To Determine Internal Battery Impedance Patents (Class 324/430)
  • Patent number: 10429444
    Abstract: The present invention pertains to the detection of the state of charge of a battery, whereby the complex impedance in the diffusion region of the battery is used. An arithmetic device such as a computer determines the slope of the complex impedance at least two different frequencies in the diffusion region of a rechargeable battery when a straight-line approximation has been made. The state of charge of the rechargeable battery is detected by using the slope that has been determined, and the relationship between the state of charge and slopes that have been stored in advance in a storage means.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: October 1, 2019
    Assignee: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Daisuke Koba, Sachio Takeda, Katsunori Maegawa, Tetsuya Osaka
  • Patent number: 10377239
    Abstract: A sensor of a status determination device detects a magnitude of a terminal voltage of an auxiliary battery provided separately from a driving battery and a magnitude of a current flowing through the auxiliary battery. The driving battery is an electrical power source for a driving motor of a vehicle, and the auxiliary battery is an electrical power source for auxiliary equipment and has an output voltage lower than that of the driving battery. An internal resistance calculator calculates an internal resistance of the auxiliary battery based on the magnitude of the terminal voltage and the magnitude of the current detected by the sensor in a stable period that is before the auxiliary equipment is started and in which the magnitude of the terminal voltage and the magnitude of the current fall within predetermined fluctuation ranges, and those detected in a period after starting of the auxiliary equipment is detected.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: August 13, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Takuma Iida, Hiroyuki Jimbo, Takeshi Chiba, Shunsuke Nitta, Kazuhiro Sugie
  • Patent number: 10377247
    Abstract: A charging system for a high voltage battery includes a pair of contactors each electrically connected to one of positive and negative terminals of the battery and configured to enable charging of the battery when closed; and a controller programmed to generate a notification indicating that one of the contactors is welded closed based on port voltage values achieved while issuing a predetermined sequence of open and close commands to the contactors after charge completion.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: August 13, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Philip Michael Gonzales, Vineeth Seshadri Kallur, Masahiro Kimoto, Wesley Edward Burkman, Benjamin A. Tabatowski-Bush
  • Patent number: 10371755
    Abstract: In a general aspect, a method can include providing an indication that the electronic device has changed from a battery charging state to a battery discharging state and measuring an initial measured state-of-charge (MSOC) value of a battery of the electronic device. In the event the initial MSOC value is above a threshold value, the method can further include determining a compensation value based on the initial MSOC value and the threshold value, determining an initial reported state of charge (RSOC) value by scaling the initial MSOC value using the compensation value and reporting the initial RSOC value using the electronic device.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: August 6, 2019
    Assignee: Fairchild Semiconductor Corporation
    Inventor: James Meacham
  • Patent number: 10333182
    Abstract: A method and system are disclosed for estimating cell voltage excursion in a battery pack in the presence of a sensing fault in which actual cell voltages of first and second battery cells in a block of battery cells become unknown or missing. The sensing fault is detected, and a cell voltage is determined for each cell in the block other than the first and second cells. The method also includes measuring a block voltage, calculating an average cell voltage in the block, and estimating that the first cell is equal to the calculated average cell voltage. All excursion or deviation of the measured block voltage from a sum of the cell voltages and the estimated cell voltage of the first cell is assigned to the second cell. A control action is executed using the estimated cell voltages, including selectively enabling or disabling functionality of the battery pack.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: June 25, 2019
    Assignee: GM Global Technology Operations LLC
    Inventors: James C. Gibbs, Todd W. Bazzett, Andrew C. Baughman, Todd F. Mackintosh
  • Patent number: 10326176
    Abstract: Systems and methods for monitoring a state of health of a battery are disclosed. The state of health of the battery may be determined based on an internal resistance of the battery. The state of health of the battery may be determined based on a measured terminal voltage of the battery, a measured current of the battery, a temperature of the battery, and a state-of-charge of the battery.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: June 18, 2019
    Assignee: Enerdel, Inc.
    Inventor: Zhengming Wang
  • Patent number: 10298030
    Abstract: A battery pack includes a battery, a terminal unit, a first current path, a second current path, and a first voltage sensing path. The battery has first and second battery terminals. The terminal unit includes a first pack terminal, a second pack terminal, and a first sensing terminal. The first current path includes charging and discharging switches and is located between the first battery terminal and the first pack terminal. A charging current and discharging current of the battery flows on the first current path. The second current path is between the second battery terminal and the second pack terminal. The first voltage sensing path includes the first sensing terminal, and voltage between the first sensing terminal and another terminal corresponds to a voltage between the first battery terminal and the first sensing terminal.
    Type: Grant
    Filed: July 18, 2016
    Date of Patent: May 21, 2019
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Jiyeon Choi, Jongchan Han, Giyoung Kim
  • Patent number: 10281530
    Abstract: A battery capacity measuring device that measures the battery capacity of a rechargeable battery includes an impedance measurement unit that measures the complex impedance of a rechargeable battery, which is a subject to measurement, based on application of measurement AC power, a parameter calculation unit that calculates a parameter that is a ratio of a difference between measured angular speeds of two complex impedances having different measured angular speeds in a diffusion region among a plurality of measured complex impedances to a difference between components of the two complex impedances, and a capacity calculation unit that calculates the capacity of the rechargeable battery based on information that is set in advance and indicates the relationship between the capacity of the rechargeable battery and the parameter and a parameter calculated by the parameter calculation unit.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: May 7, 2019
    Assignee: PRIMEARTH EV ENERGY CO., LTD.
    Inventors: Hiroki Nishi, Daisuke Koba, Tetsuya Osaka
  • Patent number: 10249913
    Abstract: A battery pack cooling system includes a plurality of cells disposed in an internal space of a battery pack case so as to form a cooling passage configured to cool the cell modules by cooling air flowing in the cooling passage. A first temperature sensor is a minimum temperature sensor disposed in the upstream position which becomes a lowest temperature. A second temperature sensor is a maximum temperature sensor disposed in the downstream position which becomes a highest temperature. A third temperature sensor is configured to measure the temperature of either the highest temperature or the lowest temperature disposed in a second cell module. A cooling passage includes a cooling air inlet passage, a cooling air exhaust passage, and a plurality of cooling branch passages disposed to connect the cooling air inlet passage and the cooling air exhaust passage in parallel.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: April 2, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Toyoki Iguchi, Hiroaki Hashimoto, Masayoshi Saeki, Hiroaki Saitou, Shigeyuki Kiyota, Yoshiyuki Tanaka, Hiroshi Iwata, Hiroshi Hoshi, Akira Kotaki, Nayuta Yamachi, Toshiyuki Yoshida, Chikara Kikkawa, Takeshi Haga
  • Patent number: 10215813
    Abstract: In a state monitoring of a storage battery, accuracy of estimation of the remaining service life of the storage battery can be improved by monitoring the state of the storage battery and distinguishing an initial failure and an accidental failure from degradation over time.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 26, 2019
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Ichiro Mukaitani, Takeo Sakamoto, Yoshiaki Itoh
  • Patent number: 10197629
    Abstract: A method of generating at least one recommended replacement time signal for a battery is provided. The method includes measuring a plurality of associated unloaded and loaded battery voltages. A delta voltage for each associated unloaded and loaded battery voltage is then determined. A select number of delta voltages are averaged. A minimum delta voltage is determined from a plurality of the averaged delta voltages. At least one recommended replacement time signal for the battery is generated with the use of the minimum delta voltage when at least one averaged delta voltage is detected that has at least reached a replacement threshold.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: February 5, 2019
    Assignee: Medtronic, Inc.
    Inventors: Charles R. Gordon, James D. Reinke, Val D. Eisele
  • Patent number: 10193174
    Abstract: A fuel cell internal state detection system includes estimation object state quantity setting unit for setting a suitable estimation object state quantity as an index of an internal state, an impedance value acquisition unit configured to obtain an impedance value of a fuel cell, an impedance usability judging unit configured to judge whether or not the obtained impedance value is usable for the calculation of the estimation object state quantity, estimation object state quantity calculation unit for calculating the estimation object state quantity set by the estimation object state quantity setting unit on the basis of the obtained impedance value when the impedance value is judged to be usable for the calculation of the estimation object state quantity by the impedance usability judging unit, and an unusable-scene process execution unit configured to perform an unusable-scene process when the impedance value is judged not to be usable for the calculation of the estimation object state quantity by the impeda
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 29, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Toshikazu Kotaka, Tetsuya Aoki
  • Patent number: 10046664
    Abstract: An internal resistance estimation method for a secondary battery includes: acquiring an initial internal resistance value and temperature course information including a battery temperature and time information about time at which the battery temperature has been recorded; estimating an increased amount of the internal resistance value after a lapse of a predetermined time from the predetermined reference time on the basis of the temperature course information; estimating a reduced amount of the internal resistance value of the secondary battery resulting from a relative change between a range of use of a state of charge of the positive electrode and a range of use of a state of charge of the negative electrode on the basis of the temperature course information; and calculating an internal resistance variation in the lapse of the predetermined time on the basis of the increased amount and the reduced amount.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: August 14, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Komiyama
  • Patent number: 10023068
    Abstract: Methods, systems, and apparatus of managing the lifespan of a battery are disclosed herein. A method comprises interpreting age data indicative of a current age of a battery, interpreting usage data indicative of a current usage of the battery, comparing the age data to the usage data, and allocating a propelling power from the battery in a hybrid electric vehicle (HEV) responsive to the comparison.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: July 17, 2018
    Assignee: Cummins, Inc.
    Inventors: Lining Zhou, Martin T. Books
  • Patent number: 9931960
    Abstract: Systems and methods for measuring voltage of a battery pack for an electrified vehicle, such as an electric or hybrid vehicle, include a battery having internal circuits that measure pack voltage and individual cell voltages, an electric machine powered by the battery to propel the vehicle via an external circuit that measures the pack voltage, and a processor programmed to publish the pack voltage to a vehicle network based on a first internal circuit voltage in response to a voltage differential among the internal circuits being less than a threshold and based on the individual cell voltages otherwise. The published pack voltage may be used by one or more battery or vehicle controllers to control various battery and vehicle functions including engine starting in a hybrid vehicle and battery charging and discharging, for example.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: April 3, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Benjamin A. Tabatowski-Bush, Michael Edward Loftus, Xu Wang
  • Patent number: 9931957
    Abstract: The invention relates to a battery system (100) with a battery (20), which is designed to supply a high voltage network (70) with electric energy, and a measuring device (130) for measuring at least one insulation resistance provided between the battery (20) and a housing of the battery (20). The measuring device (130) is equipped with two measuring paths (140, 150), each of which is paired with one of two high-voltage connections (21, 22) of the battery (20), each of which comprises a series circuit that comprises a first resistor (142, 152) and a relay (145, 155), and each of which is connected between the paired high-voltage connection (21, 22) and a point (25) that has a housing potential. Furthermore, each series circuit has a semiconductor switch (147, 157). The measuring device (130) also has two functional modes in which the relays (145, 155) of the measuring paths (140, 150) are closed.
    Type: Grant
    Filed: August 13, 2015
    Date of Patent: April 3, 2018
    Assignee: Robert Bosch GmbH
    Inventors: Chrysanthos Tzivanopoulos, Thomas Schaedlich
  • Patent number: 9892691
    Abstract: Systems and methods are provided for optimizing battery life in an electronic device. The device is configured to make periodic assessments of battery capacity by measuring the DC resistance value of the battery cell. The temperature of the battery cell and/or other characteristics of the device are used to determine a threshold DC resistance level. If the measured DC resistance value reaches a determined threshold level, the device can initiate a power-saving mode in which an operating parameter of the device is adjusted to decrease power consumption.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: February 13, 2018
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: James Robert Lim, Bryan Holmdahl, Mudit Sunilkumar Khasgiwala, Chang Hwa Rob Yang, Vidhyananth Ramasamy Venkatasamy
  • Patent number: 9846203
    Abstract: It is possible to accurately estimate a starting current and calculate a precise starting minimum voltage without being influenced by a change in a storage battery state or a starting state by updating a current/voltage correlation characteristic corresponding to a deterioration state of a storage battery each time a current/voltage data set obtained when a starter is driven is newly stored in association with the deterioration state of the storage battery and by calculating the starting current corresponding to a present voltage immediately before start in accordance with the current/voltage correlation characteristic corresponding to the present deterioration state of the storage battery when determination is made as to whether or not to drive the starter.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: December 19, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Saito, Hideaki Tani, Satoshi Wachi, Takafumi Hara
  • Patent number: 9836114
    Abstract: Systems and methods are provided for optimizing battery life in an electronic device. The device is configured to make periodic assessments of battery capacity by measuring the DC resistance value of the battery cell during the execution of a power-consuming operation. If the measured DC resistance value reaches a threshold level, the device can initiate a power-saving mode in which an operating parameter of the device is adjusted to decrease power consumption.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: December 5, 2017
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: James Robert Lim, Poon-Keong Ang, Mudit Sunilkumar Khasgiwala, Vidhyananth Ramasamy Venkatasamy, Thomas Gang Wang
  • Patent number: 9834099
    Abstract: A control system for a vehicle for optimizing the energy efficiency of a rechargeable electric battery system and/or for optimizing the lifetime of a rechargeable electric battery. The rechargeable electric battery system comprising: the rechargeable electric battery, a temperature management system for the rechargeable electric battery and one or more sensors for measuring one or more characteristics relating to the rechargeable electric battery. The control system comprising a control unit configured and arranged to receive data from the one or more sensors and being coupled to the temperature management system. The control unit being configured and arranged to determine in dependence upon data received from the one or more sensors, a time-weighted-average state-of-health of the rechargeable electric battery.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: December 5, 2017
    Assignee: Jaguar Land Rover Limited
    Inventor: Ian Hughes
  • Patent number: 9789304
    Abstract: A method of treating hypertension in a patient includes 1) generating, by an electroacupuncture device implanted beneath a skin surface of the patient at an acupoint corresponding to a target tissue location within the patient, stimulation sessions at a duty cycle that is less than 0.05, wherein the duty cycle is a ratio of T3 to T4, each stimulation session included in the stimulation sessions has a duration of T3 minutes and occurs at a rate of once every T4 minutes, and the electroacupuncture device comprises a central electrode of a first polarity and an annular electrode of a second polarity and that is spaced apart from the central electrode; and 2) applying, by the electroacupuncture device, the stimulation sessions to the target tissue location by way of the central electrode and the annular electrode in accordance with the duty cycle.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: October 17, 2017
    Assignee: Valencia Technologies Corporation
    Inventors: Jeffrey H. Greiner, David K. L. Peterson, Chuladatta Thenuwara
  • Patent number: 9746894
    Abstract: Systems, devices, methods, computer-readable media, techniques, and methodologies are disclosed for increasing efficiency in power management for user devices. In some embodiments, a system voltage and battery voltage of a user device may be monitored and stored. The system voltage and battery voltage may be analyzed, and a system minimum voltage threshold for a user device may be modified based on the analysis of the measurements.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: August 29, 2017
    Assignee: Amazon Technologies, Inc.
    Inventor: Vigneswaran Rajagopalan
  • Patent number: 9720047
    Abstract: Disclosed is an apparatus and method for estimating a parameter of a secondary battery. The apparatus according to the present disclosure includes a sensor means configured to measure a plurality of current-voltage data while a charging current decreases when a secondary battery is charged in such a pattern that the charging current increases to a peak value and then decreases, and a control means configured to receive an input of the plurality of current-voltage data from the sensor means, calculate a linear approximation equation representing a correlation between a current and a voltage from the plurality of current-voltage data, estimate an open-circuit voltage (OCV) of the secondary battery by reflecting a polarization voltage of the secondary battery quantified through a resistor-capacitor (RC) circuit on a Y intercept of the linear approximation equation, and estimate a state of charge (SOC) of the secondary battery from the estimated OCV.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: August 1, 2017
    Assignee: LG CHEM, LTD.
    Inventor: Won-Tae Joe
  • Patent number: 9711987
    Abstract: An apparatus and method for managing energy are disclosed herein. The apparatus for managing energy includes a State-of-Health (SOH) determination unit and an energy distribution unit. The SOH determination unit collects information about energy storage systems and energy facilities, and determines the SOH of each of the energy storage systems based on the information. The energy distribution unit distributes energy stored in the energy storage system to loads inside a building based on the information and the SOH.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: July 18, 2017
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jongwoo Choi, Il Woo Lee, Youn Kwae Jeong
  • Patent number: 9651624
    Abstract: The present disclosure includes systems and methods for state of charge estimation. In one embodiment, the present disclosure includes a method comprising receiving a voltage corresponding to a state of charge of a battery, converting the voltage to an estimated state of charge using different algorithms across different ranges. In another embodiment, an offset state of charge is applied to a first state of charge to produce an estimated state of charge.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 16, 2017
    Inventors: Krishnakumar Gopalakrishnan, Eric I Mikuteit
  • Patent number: 9588183
    Abstract: A secondary battery is charged at a predetermined charging current density to a first SOC, and discharged at a discharging current density same as the charging current density to a second SOC smaller than the first SOC, the voltage thereof is stabilized by leaving the secondary battery for a predetermined time while maintaining the secondary battery in the range of ±3° C. from the battery temperature of the secondary battery that has been discharged, the secondary battery the voltage of which has been stabilized is self-discharged under room temperature, and the presence or absence of a short-circuit is detected on the basis of a voltage drop amount after a given time.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: March 7, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takayuki Nakayama, Akio Minakuchi
  • Patent number: 9577294
    Abstract: A method of manufacturing for a secondary battery. The secondary battery is configured to include an electrode group in a battery package. The electrode group includes a positive electrode, a negative electrode, and a separator. The manufacturing method includes: (a) measuring a first voltage drop amount of the secondary battery with the passage of time in a state in which a compression force in a direction parallel to a lamination direction of the electrode group is applied to the electrode group via the battery package; (b) measuring a second voltage drop amount of the secondary battery with the passage of time in a state in which the compression force is released; and (c) detecting a small short circuit of the secondary battery by comparing the first voltage drop amount and the second voltage drop amount.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: February 21, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kosuke Iwase
  • Patent number: 9506989
    Abstract: A battery remaining amount detection unit includes: a voltage measurement section configured to measure a voltage of a battery; an open-circuit voltage calculation section configured to calculate an estimated open-circuit voltage; and a remaining amount detection section configured to detect a remaining amount of the battery from the estimated open-circuit voltage, in which the open-circuit voltage calculation section is configured to calculate a first voltage change amount as a voltage change amount from a no-load voltage when no load is applied to the battery and a closed-circuit voltage when a load is applied to the battery, and the open-circuit calculation section is configured to calculate the estimated open-circuit voltage based on the closed-circuit voltage of the battery and the first voltage change amount.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: November 29, 2016
    Assignee: Sony Corporation
    Inventor: Isao Suzuki
  • Patent number: 9482696
    Abstract: A method and an electronic device are disclosed for measuring a current. The device measures a temperature between a first sampling point and a second sampling point on a metal structure carrying a current to be measured. The device outputs a first signal according to the measured temperature and a second signal after sampling and filtering the first signal. The device detects the first voltage signal at the first sampling point and the second voltage signal at the second sampling point. The device samples and filters a difference between the first voltage signal and the second voltage signal and outputs a third voltage signal. The device restores the second signal to a temperature value representing a temperature between the first sampling point and the second sampling point and calculates a resistance value between the first sampling point and the second sampling point according to the temperature value.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: November 1, 2016
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jing Yang, Qinghuan Wei
  • Patent number: 9411019
    Abstract: A method and a system for estimating the State of Health (SOH) of a battery set are disclosed. The method utilizes a discrete quantization algorithm to estimate the SOH of the battery set, wherein the voltage standard deviations are calculated according to the loop voltages of the battery cells, and comparing the rated discharge capacity with the voltage standard deviations for estimating the SOH of the battery set.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: August 9, 2016
    Assignee: Automotive Research & Testing Center
    Inventors: Bo-Han Hwang, Kuo-Liang Weng, Deng-He Lin
  • Patent number: 9364673
    Abstract: An implantable medical device (IMD) is disclosed having measurement circuitry for measuring one or more currents in the IMD, such as the currents drawn from various power supply voltages. Such currents are measured without disrupting normal IMD operation, and can be telemetered from the IMD for review. Switching circuitry in line with the current being measured is temporarily opened for a time period to disconnect the power supply voltage from the circuitry being powered. A voltage across a capacitance in parallel with the circuitry is measured when the switching circuitry is opened and again closed at the end of the time period, with the circuitry drawing power from the charged capacitance during this time period. The average current drawn by the power supply voltage is determined using the difference in the measured voltages, the known capacitance, and the time period between the measurements.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: June 14, 2016
    Assignee: Boston Scientific Neuromodulation Corporation
    Inventors: Robert Graham Lamont, Damon Moazen, Robert D. Ozawa, Thomas W. Stouffer
  • Patent number: 9366728
    Abstract: A battery sensing section measures a voltage across a secondary battery. A current sensing section measures a current flowing through the secondary battery. A control section holds the value of an external impedance present in a discharge path outside the secondary battery, discharges the secondary battery from a first time to a second time at which an integrated discharge capacity based on a measured discharge current becomes equal to a predetermined discharge capacity reference value, calculates the internal impedance present in the secondary battery at the second time based on the measured voltage, calculates the second open voltage at the second time by multiplying the sum of the external impedance and the internal impedance by the measured discharge current, and calculates the recovered capacity of the secondary battery based on the first open voltage at the first time, the second open voltage and the discharge capacity reference value.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: June 14, 2016
    Assignees: NEC ENERGY DEVICES, LTD., NEC CORPORATION
    Inventors: Shin Suzuki, Yoichiro Tashiro
  • Patent number: 9366731
    Abstract: An internal resistance measurement device for stacked battery includes an AC power supply part for outputting an AC current to an measurement-object, which includes at least a stacked battery made of a plurality of stacked power generating elements, by being connected to the measurement-object, an AC adjusting part for adjusting an AC current so that a positive-electrode AC potential difference, which is a potential difference obtained by subtracting potential in a middle portion from potential in a portion connected to a load device on the positive side of the measurement-object, matches a negative-electrode AC potential difference, which is a potential difference obtained by subtracting potential in the middle portion from potential in a portion connected to the load device on the negative side of the measurement-object, and a resistance calculating part for calculating resistance of the battery based on the adjusted AC current and the AC potential difference.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: June 14, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Masanobu Sakai, Tetsuya Kamihara
  • Patent number: 9354278
    Abstract: This device and method use the complex impedance of a rechargeable battery to detect the state of the rechargeable battery. A computer determines the slope of the complex impedance at least two different frequencies in a diffusion region of the rechargeable battery when a straight-line approximation has been made, and compares the slope with a threshold value. If the slope is greater than or equal to the threshold value, the computer determines that the battery has a normal capacity balance, and if the slope is less than the threshold value, the computer determines that the battery has an abnormal unbalanced capacity. Furthermore, if the magnitude of an imaginary axis component of the complex impedance in the diffusion region of the rechargeable battery is greater than the threshold battery, the computer determines that the battery has an abnormal capacity balance, and if said magnitude is less than or equal to the threshold value, the computer determines that the battery has a normal capacity balance.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: May 31, 2016
    Assignee: Primearth EV Energy Co., Ltd.
    Inventors: Daisuke Koba, Sachio Takeda, Katsunori Maegawa, Naoto Sato, Tetsuya Osaka
  • Patent number: 9347997
    Abstract: In one embodiment, a method implemented by a processor, comprising receiving voltage values corresponding to a battery system, receiving charge values corresponding to charge flowing through the battery system, and determining a state of charge based on specified anchoring points of a charge integration, the anchoring points based on the received voltage and time.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: May 24, 2016
    Assignee: CHANGS ASCENDING ENTERPRISE CO., LTD.
    Inventors: Chun-Chieh Chang, Tsun Yu Chang
  • Patent number: 9319806
    Abstract: Provided is a method and apparatus for low power operation of a binaural hearing aid, the method including determining whether a residual battery exceeds a predetermined threshold level, collecting an external audio signal, in response to whether the residual battery exceeds the predetermined threshold level, and transmitting the collected audio signal to a second hearing aid.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: April 19, 2016
    Assignees: Samsung Electronics Co., Ltd., THE INDUSTRY & ACADEMIC COOPERATION IN CHUNGNAM NATIONAL UNIVERSITY (IAC)
    Inventors: Yun Seo Ku, Jong Jin Kim, Jun Il Sohn, Jong Hee Han, Dong Wook Kim, Ji Hoon Kim
  • Patent number: 9252465
    Abstract: An exemplary embodiment includes a method for determining a time to recharge a rechargeable battery system including providing impedance data over a frequency range, said impedance data characterizing the operation of a rechargeable battery within a selected time window; analyzing said impedance data for predetermined behavior of said impedance data indicating an approaching state of discharge of said battery; and, determining from said predetermined behavior of said impedance data whether a recharge of said rechargeable battery is indicated.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: February 2, 2016
    Assignee: GM Global Technology Operations LLC
    Inventor: Krishnan S Hariharan
  • Patent number: 9207284
    Abstract: A parameter estimation device includes an input signal detecting means 3 that detects an input signal inputted to an object system 1 expressed by an equivalent circuit model 5A containing at least an integrator element COCV, an output signal detecting means 2 that detects an output signal outputted from the object system, an output differentiating means 4 that differentiates the output signal to obtain and output an output differential signal, a modified equivalent circuit model 5B where respective elements of the equivalent circuit model 5A are changed to non-integrator elements in such a way that the output when the input signal is inputted becomes an output differential signal, and an element parameter estimating means 5 that estimates the parameters corresponding to the respective elements based on the modified equivalent circuit model by using the signals.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: December 8, 2015
    Assignees: CALSONIC KANSEI CORPORATION, KEIO UNIVERSITY
    Inventors: Atsushi Baba, Kensuke Osamura, Shuichi Adachi
  • Patent number: 9207286
    Abstract: An apparatus is disclosed that includes a resistance measuring unit operable to determine a solution resistance Rsol and a charge transfer resistance Rct of a battery; and at least one computer-readable non-transitory storage medium comprising code, that, when executed by at least one processor, is operable to provide an estimate of the present value of the battery by: comparing Rsol and Rct to historical deterioration transition information; estimating the number of remaining charge cycles before a discharge capacity lower limit is reached by the battery using the comparison; and estimating the number of remaining charge cycles before a discharge time lower limit is reached by the battery using the comparison. The estimate of the present value of the battery includes the smaller of the number of remaining charge cycles before a discharge capacity lower limit is reached or the number of remaining charge cycles before a discharge time lower limit is reached.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: December 8, 2015
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akihiro Matsui, Kazuto Kuroda, Yasuhiro Harada, Shinichiro Kosugi, Hisashi Oya, Mami Mizutani, Takashi Morimoto, Takeo Hayase, Yukitaka Monden, Norio Takami
  • Patent number: 9197078
    Abstract: A vehicle includes a battery pack and at least one controller programmed to implement a model of the battery pack. The model includes parameters representing an internal resistance and charge transfer impedance of the battery pack, and identified from an extended Kalman filter having an augmented state vector. The augmented state vector is at least partially defined by a time constant associated with the charge transfer impedance and a variable representing a proportionality between the internal resistance and a resistance term of the charge transfer impedance to reduce observed variability of the parameters.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: November 24, 2015
    Assignee: Ford Global Technologies, LLC
    Inventor: Tae-Kyung Lee
  • Patent number: 9164150
    Abstract: There is provided a device for calculating impedances of a battery cell for respective frequency domains. The device includes: a Fourier transformation calculator configured to perform Fourier transformation on voltage waveform data and current waveform data, which are output from the battery cell, and calculate an impedance of the battery cell by dividing a Fourier transformation data of the voltage waveform data by a Fourier transformation data of the current waveform data; a circuit constant estimator configured to estimate circuit constants of a predetermined equivalent circuit model of the battery cell, based on the impedance calculated by the Fourier transformation calculator; and an impedance estimator configured to estimate impedances of the battery cell for respective frequency domains, based on the estimated circuit constants and the equivalent circuit mode.
    Type: Grant
    Filed: July 30, 2012
    Date of Patent: October 20, 2015
    Assignee: YOKOGAWA ELECTRIC CORPORATION
    Inventor: Syuhei Okada
  • Patent number: 9147910
    Abstract: A system and method of use including a controller responsive to a deviation in absolute value or relative slope and operable to terminate a discharge operation in an energy storage device is provided. The absolute value or relative slope is determined at sampling frequency based upon a combination of measured operating parameters, for example, potential and current. Any deviation in the absolute value or relative slope indicates that a threshold limit in the available energy of the system has been reached, for example when active materials in the device are at a point of depletion, indicating a need to cease the discharge operation. The system and method operate on a real-time basis, providing instantaneous SOH information with regard to the device.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: September 29, 2015
    Assignee: General Electric Company
    Inventors: Christopher James Chuah, Roger Bull, James Sudworth, Vincent Boccanfuso, David James
  • Patent number: 9097775
    Abstract: A method and apparatus for determining the condition of a rechargeable battery determines a dynamic impedance of the battery while discharging the battery, and determines a battery condition category based on the dynamic impedance. The battery can be discharged in a manner that recovers the stored energy being discharged from the battery.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: August 4, 2015
    Assignee: Motorola Solutions, Inc.
    Inventors: Roy L. Kerfoot, Jr., Michael D. Geren, John E. Herrmann
  • Publication number: 20150145520
    Abstract: In various embodiments, a method for evaluating a cell of a battery is provided. The method may include: balancing a voltage of at least one cell of the battery using charge pulses, wherein the charge pulses are modulated with an oscillating test signal; measuring a current flow through the cell and measuring a voltage across the cell; demodulating the measured current and the measured voltage; and determining an impedance based on the demodulated current and the demodulated voltage. Further, in various embodiments, a circuit is provided, including a balancing circuit configured to inductively transfer charges between cells in a battery using current pulses, and a control unit configured to control the balancing circuit to provide the current pulses, wherein an average value of the current pulses oscillates over time.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 28, 2015
    Applicant: Infineon Technologies AG
    Inventor: Clemens Kain
  • Publication number: 20150145521
    Abstract: A method of selecting a used secondary battery includes an internal resistance measurement step of measuring a specific internal resistance (second internal resistance) at a specific battery temperature (second battery temperature) of each of used secondary batteries, and a selection step of selecting a used secondary battery or batteries having the specific internal resistance (second internal resistance) smaller than a preset threshold from the plurality of used secondary batteries whose specific internal resistances (second internal resistance) have been measured in order to exclude an electrode-deteriorated battery from the used secondary batteries.
    Type: Application
    Filed: October 1, 2014
    Publication date: May 28, 2015
    Inventors: Daisuke KOBA, Sachio TAKEDA, Koichi ICHIKAWA, Yasuhiro TAKAHASHI, Hirochika HABU
  • Publication number: 20150137823
    Abstract: A power storage member monitoring device of the present disclosure includes a circuit that designates a monitor target power storage member based on results of voltage measurement carried out more than once on each of series-connected power storage blocks, each of the power storage blocks including at least one power storage member.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 21, 2015
    Inventor: Masashi MURASAKI
  • Publication number: 20150108991
    Abstract: A battery control device calculates at least one of an allowable current and an allowable power during charge/discharge of a battery from a no-load voltage and an internal resistance of the battery, and corrects at least one of the no-load voltage and the internal resistance according to the states of charge/discharge of the battery.
    Type: Application
    Filed: May 24, 2012
    Publication date: April 23, 2015
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshinori Aoshima, Hiroshi Morikawa, Kenji Nakai, Keiichiro Ohkawa
  • Patent number: 9007068
    Abstract: A method is provided for current-based detection of an electrical fault in an electrical network of a motor vehicle, the network having at least: one battery, one pulse-controlled inverter, one d.c. voltage converter, and an intermediate circuit associated with the pulse-controlled inverter. The method includes: detecting magnitudes of each a battery current, a d.c. voltage converter current, and an intermediate circuit current; comparing current magnitudes according to provided equations; and checking based on the comparison of whether a specifiable deviation has been exceeded. An alternative method for voltage-based detection of an electrical fault in an electrical network of a motor vehicle includes: detecting magnitudes of each a battery voltage, a d.c. voltage converter voltage, and an intermediate circuit voltage; comparing voltage magnitudes according to provided equations; and checking based on the comparison of whether a specifiable deviation has been exceeded.
    Type: Grant
    Filed: November 11, 2008
    Date of Patent: April 14, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Beqir Pushkolli, Ulrich Klein
  • Patent number: 8994334
    Abstract: The battery state-of-charge calculation device (100) is provided with a SOCV calculation unit (5) which outputs a first state of charge calculated based on voltage data, a SOCI calculation unit (6) which outputs a second state of charge calculated based on current data, an estimated impedance voltage calculation unit (12) which calculates an impedance voltage value based on an effective state of charge and the current data, a static determination unit (7) which determines that the impedance voltage value remains static for a predetermined time or longer in a range identified by a predetermined threshold value and outputs the determination result; and a SOC decision unit (20) which, based on the determination result, outputs the first state of charge as the effective state of charge where the impedance voltage value is static and outputs the second state of charge as the effective state of charge where the impedance voltage value is not static.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: March 31, 2015
    Assignees: Mitsubishi Heavy Industries, Ltd., Kyushu Electric Power Co., Inc.
    Inventors: Tetsuro Shigemizu, Masami Iida, Takehiko Nishida, Masazumi Ohishi, Kazuyuki Adachi, Shinji Murakami, Yoshihiro Wada
  • Publication number: 20150072198
    Abstract: A battery cell unit includes a battery cell and a monitoring device for monitoring the state of the battery cell. The monitoring device comprises an actuating device configured to activate an impedance spectroscopy mode provided by the battery cell unit, in which impedance spectroscopy mode measurement currents can be applied to the battery cell to perform impedance spectroscopy of the battery cell, said measurement currents flowing through the battery cell and comprising alternating currents at different frequencies. The monitoring device also comprises a sensor device designed to detect the measurement currents and the corresponding measurement voltages, each of which is a battery cell voltage arising as a response to a measurement current, such that a complex impedance of the battery cell can be determined from the measured values of the measurement currents and the measurement voltages as a function of the frequency of the measurement currents within predetermined tolerance limits.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 12, 2015
    Inventor: Holger Fink