To Determine Internal Battery Impedance Patents (Class 324/430)
  • Patent number: 11372055
    Abstract: A method for determining a resistance parameter value of an electrical energy storage unit is disclosed, comprising the following steps: a) determining a current variable representing an electric current flowing into or out of the electrical energy storage unit; b) determining a first voltage variable, which represents an electrical voltage prevailing between two pole terminals of the electrical energy storage unit; c) determining a second voltage variable, which represents an electrical voltage and results from a mathematical model of the electrical energy storage unit, wherein the current variable determined in step a) is applied to the mathematical model and the latter comprises a resistance parameter which represents an internal resistance of the electrical energy storage unit and to which a first value is allocated; d) generating an adaptation value for the resistance parameter, wherein the adaptation value is dependent on a difference variable between the first voltage variable and the second voltage v
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: June 28, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Olivier Cois, Joerg Poehler, Vincent Scharff
  • Patent number: 11372054
    Abstract: A device for battery impedance measurement includes a switched capacitor network, a controller configured to operate the switched capacitor network to cause an alternating current to flow between a battery and an energy storage; and measurement circuitry configured to measure the alternating current flowing to or from the battery and a voltage across the battery.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: June 28, 2022
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Stefano Marsili, Klaus Hoermaier, Akshay Misra, Filippo Rosetti
  • Patent number: 11353516
    Abstract: A method for calculating an accurate SOH of a battery pack by reducing an error occurring during SOH calculation of the battery pack.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: June 7, 2022
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventor: Hyun Chul Lee
  • Patent number: 11353512
    Abstract: As one example, a filter apparatus includes an input to receive an electrical input signal. The filter apparatus includes a forward path connected between the input and an output of the filter apparatus. A feedback path is connected to provide feedback to the forward path based on an output signal at the output of the filter apparatus. A filter bypass is configured to provide the input signal directly to the output and to the feedback path for an activation phase of the filter apparatus. Diagnostics may also be performed.
    Type: Grant
    Filed: October 15, 2020
    Date of Patent: June 7, 2022
    Assignee: Texas Instruments Incorporated
    Inventors: Takao Oshida, Bryan Andrew Mueller
  • Patent number: 11346887
    Abstract: Provided is a method for calculating the SOH of a battery power pack. The method comprises the following steps: acquiring a charging curve of a cell of a battery power pack, and determining a current charging phase according to the charging curve, wherein the charging phase comprises a high voltage charging inflection point and a high voltage charging phase (S1); acquiring a battery pack power amount corresponding to the high voltage charging inflection point and a battery pack power amount corresponding to the high voltage charging phase (S2); calculating the remaining capacity of a cell according to the battery pack power amount corresponding to the high voltage charging inflection point and the battery pack power amount corresponding to the high voltage charging phase (S3); and calculating the SOH of the cell according to the remaining capacity (S4).
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: May 31, 2022
    Assignee: BYD Company Limited
    Inventors: Linwang Deng, Tianyu Feng, Chun Lv, Siqi Lin, Zihua Yang
  • Patent number: 11340277
    Abstract: An abnormality determination device for a secondary battery includes an internal-resistance calculation unit, a threshold memory unit, a capacity balance comparison unit, and an abnormality determination unit. The internal-resistance calculation unit detects an internal resistance in a negative-electrode reaction resistance dominant region in which a reaction resistance of a negative electrode is dominant in a charge and discharge reaction of the secondary battery. The threshold memory unit stores a capacity balance threshold used as a reference for determining abnormality in a balance between a capacity of a positive electrode and a capacity of the negative electrode in the secondary battery. The capacity balance comparison unit compares the internal resistance calculated by the internal-resistance calculation unit with the capacity balance threshold stored in the threshold memory unit.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: May 24, 2022
    Assignee: DENSO CORPORATION
    Inventors: Nobuo Yamamoto, Ichiro Yamada, Shuhei Yoshida, Masaya Nakamura, Takehiko Yamaki, Hiroyasu Suzuki, Katsuki Hayashi
  • Patent number: 11327139
    Abstract: A measurement device includes: a host computer and a current source, wherein the host computer is configured to: control, when ambient temperature of a current detection device is at a preset temperature within an operation temperature range of a shunt of the current detection device, the current source to output a current with a preset current value to the current detection device; receive a calibrated current value sent by the current detection device; calculate a measurement error of the current detection device according to the preset current value and the calibrated current value; and instruct, when the measurement error is less than a preset current error, the current detection device to use the predetermined current calibration coefficient as a current calibration coefficient.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: May 10, 2022
    Assignee: Contemperary Amperex Technology Co., Limited
    Inventors: Yizhen Hou, Zhimin Dan, Wei Zhang, Jia Xu
  • Patent number: 11300628
    Abstract: A method includes recording a branch current and a terminal voltage of each of two parallel connected cells of a battery pack during the battery pack being switched from a charging or discharging state through a rest state to a balance state, to obtain an internal resistance of each cell, and an open-circuit voltage (OCV) and a state of charge (SOC) of the battery pack in the balance state, to obtain an OCV and a SOC of each cell just before the battery pack is switched to the rest state; and obtaining an aging differential index according to the SOC of each cell just before the battery pack is switched to the rest state, the branch current of each cell just after the battery pack is switched to the rest state, and a rated capacity of the battery pack, to determine a relative aging level of the two cells.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: April 12, 2022
    Assignee: Simplo Technology Co., Ltd.
    Inventor: Yi-Ren Guo
  • Patent number: 11280844
    Abstract: Various examples relate to techniques of monitoring a reliability of a cell-impedance measurement of a battery cell. In one example, a device includes a first interface configured to inject an AC excitation current into a battery cell and a shunt resistor coupled in parallel to the battery cell. The device also includes a second interface configured to inject an AC test current into the shunt resistor. The device also includes analog-to-digital converters configured to measure a cell voltage across the battery cell associated with the AC excitation current, a shunt voltage across the shunt resistor associated with the AC excitation current and the shunt voltage across the shunt resistor associated with the AC test current.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: March 22, 2022
    Assignee: Infineon Technologies AG
    Inventors: Klaus Hoermaier, Guenter Hofer, Stefano Marsili
  • Patent number: 11280837
    Abstract: A method for detecting failure of a battery cell due to an unknown discharge current, including connecting a detector in series between the battery cell and a power supply for supplying a charging power, determining whether the charging of the battery cell progresses by the charging power in excess of a predetermined battery cell specific charging reference time, measuring a current value of the battery cell in real time if the charging of the battery cell progresses in excess of the battery cell specific charging reference time, determining whether the current value of the battery cell measured in real time exceeds a predetermined battery cell specific failure determination reference current range value, and determining a state of the battery cell as a failure state if the current value of the battery cell exceeds the predetermined battery cell specific failure determination reference current range value.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: March 22, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Jin Sam Koo, Kwang Soo Jeon, Jun Hyuk Pack, Dong Hyun Lee, Kyoung Min Kwon, Jong Hwa Lee
  • Patent number: 11264651
    Abstract: An apparatus is configured to determine the leakage resistance in respect of the positive and/or negative terminals of a vehicle battery. The apparatus includes a first pair of serially arranged resistors connected between the terminals with a first switch connected between the resistors and a second pair of serially arranged resistors connected between the vehicle chassis/nominal ground and the negative terminal or the positive terminal, with a second switch connected between the resistors. A further fifth resistor is connected between the vehicle chassis/nominal ground, and the negative terminal or the positive terminal via a third switch, and a controller is configured to selectively control the switches during processing steps.
    Type: Grant
    Filed: February 28, 2020
    Date of Patent: March 1, 2022
    Assignee: DELPHI TECHNOLOGIES IP LIMITED
    Inventors: Seyed R. Zarabadi, Mark W. Gose
  • Patent number: 11262414
    Abstract: A device detects a deformation of an electrical energy store. The device has a measuring device which is designed to measure the electrical current/voltage behavior of the energy store, and an evaluation unit which is designed to detect a change in the current/voltage behavior and to determine the deformation on the basis of the change.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: March 1, 2022
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Jan Philipp Schmidt
  • Patent number: 11262412
    Abstract: Systems and methods of monitoring and testing a battery module, including generating Electrochemical Impedance Spectra (EIS) of one or more battery modules, fitting the EIS spectra to an equivalent circuit model to establish equivalent circuit fit parameters, measuring an open circuit voltage of the one or more battery modules, measuring a temperature of the one or more battery modules, combining the EIS equivalent circuit fit parameters with measured open circuit and temperature values to determine weighting parameters of the equivalent circuit fit parameters, applying the weighting parameters to the equivalent circuit fit parameters to generate weighted equivalent circuit fit parameters, and generating a state-of-health (SoH) measurement of the one or more battery modules based on the weighted equivalent circuit fit parameters.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: March 1, 2022
    Assignee: Advanced Measurement Technology, Inc.
    Inventors: John Christopher Harper, Oliver James Curnick, Jonathan Edward Harrisson Sansom
  • Patent number: 11221372
    Abstract: A battery performance evaluation device executes an alternating current impedance acquiring process (S1), an OCV acquiring process (S2), and an SOC estimating process (S3). The alternating current impedance acquiring process involves acquiring a measurement result of an alternating current impedance of a target secondary battery, the alternating current impedance measured by applying an application signal to the target secondary battery within a specific frequency range. The OCV acquiring process involves acquiring an OCV of the target secondary battery. The SOC estimating process involves estimating an SOC of the target secondary battery to be 0%, if an imaginary component of the measurement result of the acquired alternating current impedance at a predetermined frequency within the specific frequency range is greater than or equal to a first threshold value and the acquired OCV value is less than or equal to a second threshold value.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: January 11, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahiko Mitsui, Junta Izumi, Juni Yasoshima
  • Patent number: 11214168
    Abstract: A deterioration-state calculation method for a battery comprises: detecting current and voltage of the battery; calculating a charge state based on the detected value; calculating a first deterioration state of the battery for each predetermined period based on an elapsed time from the time use is started and an amount of charge-discharge; calculating a second deterioration state based on a change amount in the charge state of the battery and a change amount of current; calculating the second deterioration state for a plurality of times within the predetermined period; calculating reliability of calculation of the second deterioration state for each of a plurality of the second deterioration states based on the detected value; calculating a correction value of the deterioration state based on the second deterioration state with the reliability of the predetermined reliability or higher; and calculating the deterioration state by correcting the first deterioration state.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: January 4, 2022
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Rei Aoyama
  • Patent number: 11193983
    Abstract: The first step includes performing FFT for a voltage and a current of a battery a plurality of times to thereby calculate the voltage and the current for each frequency. The second step includes determining whether or not the first condition and the second condition are satisfied for the current of the battery that is calculated for each frequency. The third step includes calculating an impedance component of the battery for each frequency range when at least one of the first condition and the second condition is not satisfied, and not calculating the impedance component of the battery for each frequency range when each of the first condition and the second condition is satisfied. The first condition shows that the current in a low frequency range is greater than a reference value. The second condition shows that the current in a frequency range is less than a reference value.
    Type: Grant
    Filed: November 12, 2018
    Date of Patent: December 7, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanori Soejima, Hiroshi Hamaguchi, Ryo Kanada, Nobuyasu Haga
  • Patent number: 11190036
    Abstract: A power supply device and a power supply control method with which charging and electric power supply can be continued efficiently, and a charge capacity can be added is disclosed. A power supply device including: plural battery units replaceably connected to a battery connection part, an output unit for outputting electric power from the battery unit to a load, and a control unit for controlling connection of the plural battery units with respect to the output unit, wherein the control unit selects a battery unit having a remaining charge amount that is smallest among the plural battery units and equal to or greater than a first predetermined amount, and connects the selected battery unit to the output unit.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: November 30, 2021
    Assignee: MIRAI-LABO KABUSHIKI KAISHA
    Inventor: Toshio Hiratsuka
  • Patent number: 11175347
    Abstract: The present invention relates to a device and a method for diagnosing battery deterioration, the device comprising: a battery comprising at least one cell; a charging unit for charging the cell, and performing cut-off during a stabilization time in which the charged cell is stabilized; a sensing unit for measuring a current of the cell with respect to time; and a control unit for, by using the measured current, detecting an inflection point of the measured current, calculating a slope of the measured current in a first period after a time corresponding to the inflection point; and comparing the current slope of a reference cell, corresponding to the slope of the measured current, so as to diagnose whether the cell has deteriorated.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: November 16, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Ji Yeon Kim, Yoon Jung Bae
  • Patent number: 11163008
    Abstract: A terminal device, a method for monitoring battery safety of a terminal device, and a system for monitoring battery safety of a terminal device are provided. The method for monitoring battery safety includes the following steps. A voltage of a battery of the terminal device is acquired in real time, and temperature of each area of a battery surface of the battery is acquired in real time, where the battery surface is divided into multiple areas. Whether a sudden change in voltage has occurred to the battery is determined according to the voltage of the battery acquired in real time, and whether the battery surface has an abnormal temperature area is determined according to the temperature of each area. Upon determining that the sudden change in voltage has occurred to the battery and the battery surface has the abnormal temperature area, the battery is determined to be currently abnormal.
    Type: Grant
    Filed: March 15, 2019
    Date of Patent: November 2, 2021
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventor: Wei Chen
  • Patent number: 11104242
    Abstract: A vehicle battery system has a battery including a plurality of series connected cells, a bus bar electrically connected between an adjacent pair of the series connected cells, and circuitry. The circuitry injects a sinusoidal current waveform through the bus bar, obtains a magnitude of a sinusoidal voltage waveform contained by an overall voltage of the bus bar that is caused by the sinusoidal current waveform from a sampled and filtered version of the overall voltage and digital data defining the sinusoidal current waveform, obtains a resistance of the bus bar from the magnitude of the sinusoidal voltage waveform and a measured magnitude of the sinusoidal current waveform, and obtains a magnitude of current through the battery from a DC portion of a spectrum of the overall voltage and the resistance of the bus bar.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: August 31, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Benjamin A. Tabatowski-Bush, Baojin Wang, John Paul Gibeau
  • Patent number: 11099598
    Abstract: Disclosed as a clock alignment module for a near field communication, NFC, controller operable in active load modulation, ALM, card mode, the module being operable during a transmit mode comprising transmit bursts and comprising: an input for receiving a field clock signal (CLK_FIELD); an output for outputting a local controller clock signal (CLK_FB); a transmit envelop unit configured to determine whether a time since an end of a latest transmit burst exceeds a threshold, Tdelay; and a phase locked loop, PLL, configured to selectively lock the phase of the local controller clock signal to the phase of the field clock signal, in response to the time exceeding the threshold and a next transmit burst not having started. Associated NFC controllers, integrated circuits and methods are also disclosed.
    Type: Grant
    Filed: February 21, 2020
    Date of Patent: August 24, 2021
    Assignee: NXP B.V.
    Inventors: Sebastien Prouet, Stefan Brennsteiner
  • Patent number: 11085960
    Abstract: An insulation detection method includes: a first and second equivalent resistances are calculated; the less one of the first and second equivalent resistances is taken as a first insulation resistance, which is an insulation resistance of the high voltage circuit on the side where the battery pack locates relative to the reference potential terminal; when the first insulation resistance is normal, the switch unit is closed, and a second insulation resistance is calculated according to the first and second equivalent resistances, voltages of a first and second sampling point when the switch unit is closed; the second insulation resistance is an insulation resistance of the high voltage circuit on the side where the load locates relative to the reference potential terminal; the insulation state of the high voltage circuit on the side where the load locates is determined according to the second insulation resistance.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: August 10, 2021
    Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
    Inventors: Le Chu, Qiandeng Li, Yanhui Fu, Qidong Lou
  • Patent number: 11073567
    Abstract: A vehicle battery diagnosis method and apparatus are provided. The vehicle battery diagnosis method includes receiving battery state history data including data stored based on state of charge (SOC) ranges of a battery and SOCs of the battery. Maximum distributions of the SOCs of the battery are then determined based on the battery state history data. A state of the battery is diagnosed based on a reduction rate among the maximum distributions of the SOCs of the battery based on the battery state history data.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: July 27, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventor: Ki Seon Ryu
  • Patent number: 11047916
    Abstract: A battery diagnosis device includes: one or more sensors which measure at least one of a current value, a voltage value, and a temperature value of a battery; a first determination unit which acquires, from the sensor, at least one of measured values of the current value, the voltage value, and the temperature value of the battery, and determines a state of the battery by using a first method, based on the acquired measured values; a second determination unit which acquires, from the sensor, at least one of measured values of the current value, the voltage value, and the temperature value of the battery, and determines the state of the battery by using a second method different from the first method, based on the acquired measured values; and a diagnosis unit which diagnoses the battery, based on determination results of the first determination unit and the second determination unit.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: June 29, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshiyuki Takahara, Linyu Sun
  • Patent number: 11048835
    Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for the generation and use of a fast battery model. One of the methods includes obtaining temperature data for one or more locations within or on the surface of a battery, the temperature data comprising time-varying heat flow inputs applied to the battery and time-varying temperature signals generated by the battery. The method also includes processing the temperature data to generate a continuous-time thermal model having one or more time-delay elements and one or more parameters, wherein parameter values are fitted using the temperature data.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: June 29, 2021
    Assignee: Dassault Systemes Simulia Corp.
    Inventor: Edward Dean Tate, Jr.
  • Patent number: 11031640
    Abstract: An assembled battery is constituted of a plurality of battery blocks connected in series, each battery block including a plurality of cells. SBMs are provided corresponding to the battery blocks, respectively. Each of the SBMs is configured to monitor at least one of a voltage of each cell included in a corresponding battery block, and a voltage of the corresponding battery block. A total voltage monitoring circuit is configured to monitor the total voltage of the assembled battery, separately from the SBMs.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: June 8, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masaya Murase, Hiromasa Tanaka
  • Patent number: 10985413
    Abstract: A method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a method in which a voltage is applied to a battery and the current value thereof is measured. The method includes the steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.2*105 ?·cm2 or more; a voltage applying step of applying voltage to an all solid state battery of which the resistance is increased; and a judging step of judging acceptability of the all solid state battery based on a current value measured in the voltage applying step.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: April 20, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato Kamiya, Katsuhiko Nagaya, Norihiro Yamada, Shinobu Okayama, Takayuki Hojo
  • Patent number: 10962601
    Abstract: A method and system to determine if there is an open cell in a battery pack of cells arranged in a lattice. Voltage measurements from each parallel cell group along with information on the battery pack topology are used to estimate the resistance of each cell group. The resistance of each cell group is calculated based on the measured voltage less a nominal open circuit voltage divided by the current level of the battery pack. The average cell group resistance of the battery pack is also calculated. The cell group resistances are analyzed statistically using the resistance of each cell group and the average cell group resistance to reveal outliers which are indicative of open cell groups.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: March 30, 2021
    Assignee: BAE Systems Controls Inc.
    Inventor: Robert A. Hess
  • Patent number: 10955484
    Abstract: The present disclosure relates to the field of battery state monitoring technologies, and in particular, to a battery state monitoring method and apparatus. The method is: monitoring a voltage value and a current value of an output end of a battery; determining a battery impedance value based on the voltage value; calculating an impedance voltage-drop value based on the current value and the battery impedance value; calculating an open circuit voltage of the battery based on the voltage value and the impedance voltage-drop value; when a difference of the open circuit voltage between two consecutive calculations is greater than or equal to a threshold, judging that the battery state is abnormal; and when the difference of the open circuit voltage between two consecutive calculations is determined to be lower than the threshold, updating the battery impedance value based on the voltage value and the current value.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: March 23, 2021
    Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
    Inventors: Fei Wu, Juan Jin, Kefei Wang
  • Patent number: 10955486
    Abstract: A method for monitoring battery safety is provided. When a terminal device remains coupled with an adaptor after charging of a battery of the terminal device is completed, in response to the terminal device being in a low-power state, recharge information of the terminal device is acquired. According to the recharge information of the terminal device, whether the battery is abnormal is determined. The disclosure further provides a system for monitoring battery safety and a non-transitory computer readable storage medium.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: March 23, 2021
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventor: Wei Chen
  • Patent number: 10948546
    Abstract: Various embodiments of the present technology comprise a method and apparatus for battery management. In various embodiments, the apparatus comprises a lithium ion battery and a fuel gauge circuit to monitor the resistance and the capacity as the battery ages. The fuel gauge circuit utilizes the resistance and capacity values to compute resistance changes due to both cycle aging and calendar aging separately. The fuel gauge circuit utilizes the change in resistance values to determine aged capacity values. The fuel gauge circuit controls charging/discharging of the battery according to the aged capacity values.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: March 16, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Hideo Kondo
  • Patent number: 10921385
    Abstract: A system for differentiating short circuiting in a battery includes: a detector coupled to the battery; a monitor in communication with the detector, the monitor including a profile of a battery shorting behavior, and a comparator for matching data from the detector to the profile; and a controller for taking action based upon information from the detector. A method for detecting short circuiting in a battery includes the steps of: detecting a behavior of the battery; comparing the behavior of the battery to a predetermined battery behavior profile; determining the type of short based on the comparison; and taking mitigating action based on the determination. The system/method may monitor: temperature of the battery, heat generation from the battery, current flow through the battery, voltage drop across the battery, and/or combinations thereof. The system/method discriminates between the various battery shorting behaviors for aggressive response or passive response.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: February 16, 2021
    Assignee: Celgard, LLC
    Inventors: Zhengming Zhang, Weifeng Fang
  • Patent number: 10903669
    Abstract: A control device for controlling charging of a rechargeable battery, the control device being configured to: determine the voltage of the battery during charging of the battery, stop charging, when the determined voltage exceeds a predetermined upper voltage limit, determine the voltage of the battery after stopping charging, determine the voltage difference between the predetermined upper voltage limit and the determined voltage of the battery after stopping charging, and continue charging, when the determined voltage difference exceeds a predetermined threshold. A corresponding method controls charging of a rechargeable battery.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: January 26, 2021
    Assignee: TOYOTA MOTOR EUROPE
    Inventors: Keita Komiyama, Yuki Katoh
  • Patent number: 10847982
    Abstract: A battery control system including a secondary battery within which gas is generated with use, and a controller configured to control charging/discharging of the secondary battery. In the controller, a measurer is configured to measure a resistance of the secondary battery, and a stop director is configured to stop charging/discharging of the secondary battery when the resistance of the secondary battery has exceeded a predetermined resistance threshold.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: November 24, 2020
    Assignee: DENSO CORPORATION
    Inventors: Norikazu Adachi, Tomoki Yamane
  • Patent number: 10809303
    Abstract: The present invention relates to an apparatus and a method for estimating a state of a battery, and more particularly, an apparatus for estimating a state of a battery includes: a first SOC estimating unit estimating a first state of charging (SOC) of the battery based on open circuit voltage and a temperature of the battery; a first SOH estimating unit estimating a first state of health of the battery based on the first SOC and the current of the battery; and a second SOC estimating unit estimating a second SOC of the battery based on the first SOH, charging/discharging voltage, the temperature, and the current of the battery or estimating the second SOC of the battery based on the charging/discharging voltage, the temperature, and the current of the battery.
    Type: Grant
    Filed: January 28, 2016
    Date of Patent: October 20, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Hyunchul Lee, Jongmin Park, Kiwook Jang, Jongbum Lee
  • Patent number: 10809133
    Abstract: The invention describes a calorimetric measurement set-up having a sensor unit (1) for controlling the quality of the operation of a battery having a cathode and an anode, wherein the measurement set-up or the sensor unit (1) is connected to data processing electronics (11) via a communication link (12) and sensor measured values are therefore recorded and processed. This measurement set-up is intended to achieve reproducible and sufficiently accurate quality control of a battery.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: October 20, 2020
    Assignee: greenTEG AG
    Inventors: Lukas Durrer, Wulf Glatz, Thomas Helbling
  • Patent number: 10797293
    Abstract: A battery pack includes a plurality of unit cells, each including an electrode body having a structure in which a positive electrode and a negative electrode are stacked, and a busbar that electrically connects a positive electrode terminal to a negative electrode terminal between the unit cells. The unit cells are stacked adjacent to one another in the same direction as a direction in which the positive electrode and the negative electrode of the electrode body are stacked. The busbar electrically connects the unit cells disposed apart from each other among the unit cells excluding the unit cells disposed adjacent to each other.
    Type: Grant
    Filed: November 10, 2017
    Date of Patent: October 6, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato Kamiya, Masaru Ishii, Takayuki Hojo, Tetsuya Kaneko
  • Patent number: 10782353
    Abstract: A device that estimates the residual capacity of a lithium ion battery (3) that starts an engine starter (1), includes a control section (30) that calculates resistance values of a cathode and anode of the lithium ion battery based on detected values of a voltage sensor (SN1) and a current sensor (SN2) at the time when a first time has elapsed, and at the time when a second time longer than the first time has elapsed, from startup of the engine starter, and estimates the residual capacity from increases over time in the resistance values. The control section (30) starts the engine starter with the lithium ion battery under conditions under which the startup time of the engine starter will be longer when the last startup time of the engine starter is shorter than the second time or when a predetermined time period has elapsed from the last estimation.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: September 22, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Tenyu Yan, Takashi Utsunomiya
  • Patent number: 10775440
    Abstract: Methods, apparatuses, and systems for measuring impedance spectrum, power or energy density, and/or spectral density using frequency component analysis of power converter voltage and current ripple are described herein. An example method for measuring impedance spectrum, power spectrum, or spectral density can include measuring an alternating current (AC) ripple associated with a power converter, where the AC ripple includes an AC current ripple and an AC voltage ripple. The method can also include performing a frequency analysis to obtain respective frequency components of the AC current ripple and the AC voltage ripple, and calculating an impedance spectrum, a power spectrum, or a spectral density of an electrical component based on the respective frequency components of the AC current ripple and the AC voltage ripple.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: September 15, 2020
    Assignee: The Board of Trustees of the University of Alabama
    Inventor: Jaber A. Abu Qahouq
  • Patent number: 10759006
    Abstract: A method and a test fixture for evaluating a battery cell are described, wherein the battery cell is composed of a cell body having a plurality of electrode foils that are joined to both a positive terminal and a negative terminal at weld junctions. The method includes retaining the cell body of the battery cell in a first clamping device and gripping one of the positive and negative terminals in a terminal gripper. A dynamic stress end effector coupled to the terminal gripper is employed to apply a vibrational excitation load to the one of the positive and negative terminals. Impedance between the positive terminal and the negative terminal is monitored via a controller, and integrity of the weld junction of the one of the positive and negative terminals is evaluated based upon the impedance.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: September 1, 2020
    Assignee: GM Global Technology Operations LLC
    Inventors: Wayne W. Cai, Debejyo Chakraborty, Qian Lin, John M. Moote, Anthony Ottomano, Teresa J. Rinker
  • Patent number: 10753978
    Abstract: A method for testing an all solid state battery with which the presence of short circuit or the presence of defect causing short circuit can be detected with high accuracy by a comparatively simple method in which a voltage is applied to a battery and the current value thereof is measured. The method comprising steps of: a resistance increasing step of increasing resistance of an all solid state battery to 3.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: August 25, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiko Nagaya, Masato Kamiya, Shinobu Okayama
  • Patent number: 10753985
    Abstract: To determine in a simple and unequivocal manner whether measurement contacts at which a voltage is to be measured have been properly contacted in a measurement system, in the measurement system, after a discharge switch connecting a charging circuit to a voltage measurement device is closed, the charging circuit is discharged via an internal resistance of the voltage measurement device. When the discharge switch is closed, after a measurement switch connecting the voltage measurement device to the measurement contacts is closed, it is established whether the electrical system is contacted with the measurement system by analyzing the voltage curve at the voltage measurement device after closure of the measurement switch. Advantageously, after the discharge switch is closed, the charging circuit is discharged via a discharge resistor connected in series or in parallel with the voltage measurement device and via the internal resistance.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: August 25, 2020
    Assignee: AVL DiTest GmbH
    Inventors: Christian Huber, Roman Riegler
  • Patent number: 10680294
    Abstract: A method for managing a battery according to a state of health of the battery, comprising, prior to using the battery, predetermining a maximum depth of discharge profile according to the state of health of the battery, the profile being dependent on a technology of the battery, on a nominal energy level to be made available each time the battery is discharged, the nominal energy level being substantially constant over a service life of the battery. While using the battery, a maximum depth of discharge of the battery is adjusted at regular intervals, each time the state of health of the battery decreases by a percentage corresponding to an update interval p % that is equal to p/100, that is, for all state of health values (SOHn) that are equal to SOH0-n×p %, where n is an integer comprised between 0 and 20/p.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: June 9, 2020
    Assignee: Airbus SAS
    Inventors: Benoit Ferran, Emmanuel Joubert, Clément Dinel
  • Patent number: 10670664
    Abstract: A resistance factor determining method of a secondary battery according to the present disclosure determines, when the secondary battery has a certain temperature and state of charge, a primary differential value regarding a charge initial I-V profile calculated from a current value at a point of intersection at which a charge final I-V profile according to changes in magnitude of the charging current meets a boundary line set to a charge upper limit as the resistance factor corresponding to the temperature and state of charge. Further, a charge power estimating apparatus and method according to the present disclosure estimates a charge power corresponding to the temperature and state of charge of the secondary battery while the secondary battery is being charged using the resistance factor pre-defined according to the state of charge and temperature of the secondary battery.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: June 2, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Sun-Young Cha, Won-Tae Joe
  • Patent number: 10664365
    Abstract: Systems and methods of monitoring and controlling a back-up power supply are provided. The back-up power supply can include an uninterruptible power supply system configured with a plurality of primary battery banks maintained in long-term storage and a working battery maintained in an operable state. The back-up power supply system can monitor the condition of a first working battery to determine if the condition is below a performance threshold or a capacity threshold. The uninterruptible power supply system can transition a primary battery bank previously maintained in long-term storage to an operable state and designate the transitioned primary battery as a second working battery. The uninterruptible power supply system can switch the source of power provided by the back-up power supply from the first working battery to the second working battery.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: May 26, 2020
    Assignee: Google LLC
    Inventors: Philippe Gow, Christina Peabody
  • Patent number: 10656195
    Abstract: A system for differentiating short circuiting in a battery includes: a detector coupled to the battery; a monitor in communication with the detector, the monitor including a profile of a battery shorting behavior, and a comparator for matching data from the detector to the profile; and a controller for taking action based upon information from the detector. A method for detecting short circuiting in a battery includes the steps of: detecting a behavior of the battery; comparing the behavior of the battery to a predetermined battery behavior profile; determining the type of short based on the comparison; and taking mitigating action based on the determination. The system/method may monitor: temperature of the battery, heat generation from the battery, current flow through the battery, voltage drop across the battery, and/or combinations thereof. The system/method discriminates between the various battery shorting behaviors for aggressive response or passive response.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: May 19, 2020
    Assignee: Celgard, LLC
    Inventors: Zhengming Zhang, Weifeng Fang
  • Patent number: 10613150
    Abstract: A battery health state evaluation method for evaluating a health state of a battery comprises a charging step, an idling step, a pulse discharging step, an evaluation index calculating step, and an evaluation result yielding step. The evaluation index calculating step retrieves a continuous voltage data and a continuous current data in a charging process, an idling process, and a pulse discharge process and calculates a plurality of evaluation indexed according to the continuous voltage data and continuous current data. The evaluation indexes are associated with the health state of the battery. The evaluation result yielding step evaluates the health state of the battery according to the indexes and yields an evaluation result. Therefore, the battery health state evaluation method is easy, convenient, and effective in performing a test quickly and accurately.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: April 7, 2020
    Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Wen-Chen Lih, Hung-Jhih Ku, Bo-Lin Liao, Tsung-Yu Tsai
  • Patent number: 10605871
    Abstract: A method for determining a state of a rechargeable battery includes obtaining a complex impedance measured by applying AC voltage or AC current to a rechargeable battery that is subject to determination and determining a state of the rechargeable battery based on the obtained complex impedance. The determining a state of the rechargeable battery includes determining whether or not a first capacity shift is occurring based on a comparison of a value of the complex impedance at a predetermined frequency with a first determination value used to determine a negative electrode capacity shift, and when determined that the first capacity shift is not occurring, determining whether or not a second capacity shift is occurring based on a comparison of a gradient of the complex impedance with respect to a real axis in a diffusion resistance region with a second determination value used to determine a positive electrode capacity shift.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: March 31, 2020
    Assignees: PRIMEARTH EV ENERGY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Matsuno, Shinichiro Ito, Yasushi Nakagiri, Daisuke Koba, Tamotsu Fukuma, Junta Izumi, Kazuya Kodama, Masahiko Mitsui
  • Patent number: 10585146
    Abstract: A vehicle system provides an excitation signal to an electrochemical system for use in Electrochemical Impedance Spectroscopy diagnostics. The electrochemical system is connectable to the vehicle system and the vehicle system includes a power stage, such as a charger, connectable to the electrochemical system for supplying electrical energy to the electrochemical system, and/or connectable to the electro-chemical system for withdrawing electrical energy from the electrochemical system, and an Excitation Generation Unit comprised by the power stage or operatively connected to the power stage. The Excitation Generation Unit is adapted for instructing the power stage to generate an excitation signal for use in the Electrochemical Impedance Spectroscopy diagnostics, and the power stage is adapted for generating the excitation signal and supplying the excitation signal to the electrochemical system when so instructed by the Excitation Generation Unit.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: March 10, 2020
    Assignee: Lithium Balance A/S
    Inventors: Andreas Elkjær Christensen, Rasmus Mosbæk
  • Patent number: 10566807
    Abstract: The present invention relates to a system and a method of protecting a battery, and particularly to a system and a method of protecting a battery, which compare current state information of a battery with reference state information and control an operation of a power supplying unit that supplies power supplied from the battery to a load based on a result of the comparison in order to block power supplied from the battery that is in a problem state, thereby protecting a load from the battery in the problem state.
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: February 18, 2020
    Assignee: LG Chem, Ltd.
    Inventor: Doyul Kim