With Discharge Of Cells Or Batteries Patents (Class 320/118)
  • Patent number: 9000727
    Abstract: A system for balancing charge within a battery pack with a plurality of cells connected in series, including a capacitor; a processor configured to select a combination of donor cells and receiver cells from the plurality of cells in one of the following two modes: (1) a first mode where the number of donor cells is equal to the number of receiver cells, and (2) a second mode where the number of donor cells is greater than the number of receiver cells; and a plurality of switches that electrically connect the capacitor to the donor cells to charge the capacitor, and that electrically connected the capacitor to the receiver cells to discharge the capacitor. The transfer of charge between cells in the plurality of cells through the capacitor balances the charge within the battery pack.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: April 7, 2015
    Assignee: Motiv Power Systems, Inc.
    Inventors: Jim Castelaz, Jessica Riley, Vishal Parikh, Steven Diamond, Samuel Chang
  • Patent number: 8994335
    Abstract: A power supply apparatus supplies a power supply voltage to a charge monitor that monitors charge states of rechargeable battery cells. The apparatus includes: a first capacitative element that supplies a power supply voltage to the charge monitor; a second capacitative element that is charged from the rechargeable battery cell and charges the first capacitative element; a switch group including a first switch that connects the first and second capacitative elements, and a second switch that connects the rechargeable battery cell and the second capacitative element; and a controller that controls the switch group. The controller repeats charging the second capacitative element by the rechargeable battery cell by connecting the rechargeable cell and the second capacitative element by the first switch, and charging the first capacitative element by the second capacitative element by connecting the first and second capacitative elements by the second switch.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: March 31, 2015
    Assignee: Sony Corporation
    Inventors: Hiroyasu Tagami, Kouzi Tsukamoto
  • Patent number: 8994301
    Abstract: An electric-bicycle driving apparatus includes a speed-change mode operator to output a low-speed or high-speed mode signal, a controller to output a first or second control signal corresponding to the low-speed or high-speed mode signal, a first motor driver to output a first motor-driving signal to drive a motor in a low-speed mode in response to the low-speed mode signal, a second motor driver to output a second motor-driving signal to drive the motor in a high-speed mode in response to the high-speed mode signal, a motor-drive-load booster to boost load of the second motor-driving signal using battery power under control of the controller in response to the high-speed mode signal, and a motor speed-change switching unit to selectively receive a switching enable signal from the controller so as to be turned on to provide the second motor-driving signal having the boosted load to the motor.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: March 31, 2015
    Assignee: Mando Corporation
    Inventor: Hong Youp Son
  • Patent number: 8981722
    Abstract: A cell control device according to the present invention includes: a discharge circuit that discharges each unit cell selected by the first switches among a plurality of unit cells connected in series; a charging circuit that charges each unit cell selected by the second switches among the unit cells connected in series, and; a voltage detection unit that detects a voltage of each unit cell via voltage detection lines respectively connected to positive and negative electrodes of the unit cells; an oscillator that irradiates high frequency electromagnetic radiation upon the voltage detection lines; and a charging control unit that controls switching of the first switches, thereby performing discharge of the each unit cell, and a charging control unit that controls switching of the second switches, thereby performing charging of the unit cells, based on voltages of the unit cells that are detected by the voltage detection unit.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: March 17, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hikaru Miura, Akihiko Kudo
  • Patent number: 8984312
    Abstract: A first battery 102 is removably housed in a first battery housing unit 108, and a second battery 103 is removably housed in a second battery housing unit 110. When it is detected that a lid 107 or 109 that is used when the first battery 102 or the second battery 103 is replaced is in an open state, system control sections 113 and 114 start a restriction mode for restricting an operation of an information processing device 100 such that power consumption by the information processing device 100 is curtailed.
    Type: Grant
    Filed: July 5, 2012
    Date of Patent: March 17, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Takashi Koshimizu
  • Patent number: 8981721
    Abstract: A battery control device that controls a battery module in which a plurality of cell groups, in each of which a plurality of cells are connected in series, are connected in series or series-parallel, includes: a plurality of cell controller ICs that control each of the plurality of cell groups; and one or more connectors that are provided for connecting the plurality of cell controller ICs to the battery module; wherein: the plurality of cell controller ICs include first and second cell controller ICs that are provided in sequence, so as to control two or more of the cell groups that are connected in series; and an auxiliary connection member (a pin) is provided for connecting GND terminal side wiring of the first cell controller IC and VCC terminal side wiring of the second cell controller IC together, externally to the battery control device.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: March 17, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Tatsumi Yamauchi, Akihiro Machida, Akihiko Kudo
  • Publication number: 20150069973
    Abstract: A measurement unit (200) measures voltages and currents of battery cells (100). A battery control unit (400) calculates a present estimation value of a residual capacity of the battery cells (100) by integrating the currents. The voltages of the battery cells (100) are set to a reference voltage value V1 serving as a trigger of a process of correcting the estimation value of the residual capacity and an alarm voltage value Va which is a voltage higher than the reference voltage value. In addition, the battery control unit (400) continues discharge of all the battery cells (100), as it is, when an alarm condition in which a voltage of a minimum capacity cell is equal to or less than the alarm voltage value is not satisfied, and outputs a first signal when the voltage of the minimum capacity cell satisfies the alarm condition.
    Type: Application
    Filed: February 8, 2013
    Publication date: March 12, 2015
    Applicant: NEC ENERGY DEVICES, LTD.
    Inventor: Tadahiro Yoshida
  • Patent number: 8975870
    Abstract: A charging device supplies charge current to a battery group having plural secondary batteries connected in series to perform charging. In the charging device, a discharge route circuit for discharging charge current to be supplied to the secondary battery when the battery voltage of the secondary battery exceeds a predetermined voltage while charging is provided to every secondary battery. Also provided is a cut-off circuit for cutting off the discharge route circuit from each secondary battery after charging is completed. Discharge at a discharge route circuit is suppressed and energy efficiency is increased.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: March 10, 2015
    Assignees: Iwasaki Electric Co., Ltd., Tokyo Rectifier Co., Ltd., JPS Co., Ltd.
    Inventors: Tomomi Maruyama, Eiji Saiki, Akitoshi Kato, Yoshihiro Honda
  • Patent number: 8970171
    Abstract: The present application is directed to a power dissipation apparatus including a conductive trace formed on a substrate and to methods of using the power dissipation apparatus. The power dissipation apparatus may be used to dissipate heat generated from electrical current passed through the conductive trace of the power dissipation apparatus. The current may be provided from, for example, a battery conditioner.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: March 3, 2015
    Assignee: Zoll Medical Corporation
    Inventors: Michael Lopin, James G. Radzelovage, Hailong Xu, Frederick Faller
  • Patent number: 8963499
    Abstract: A battery pack, a method of controlling the same, and an energy storage system including the battery pack are disclosed. According to some aspects, the method may include calculating charge capacities of the battery cells, obtaining a first average value, which is an average value of the calculated charge capacities, establishing a first standard value for selecting an abnormal battery cell based on the first average value and determining a first battery cell having the lowest charge capacity from among battery cells having charge capacities greater than the first standard value. A second standard value for selecting a battery cell that is to be discharged during a cell balancing operation may be established. A cell balancing operation with respect to battery cells having charge capacities greater than the second standard value may then be performed. Accordingly, a cell balancing operation may be effectively performed in order to efficiently manage a battery pack.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: February 24, 2015
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Hyo-Joon Choi
  • Publication number: 20150048794
    Abstract: Disclosed is a battery charge balancing device which includes: a charge-measuring unit that measures charge of a plurality of batteries storing power through a plurality of power converters connected with a plurality of input power sources; a mode-conversion parameter calculating unit that calculates mode conversion parameters for determining mode conversion such that the power converters operate in a power conversion mode for converting power or in a balancing mode for balancing charge between the batteries; and a control unit that controls power transmission path of the power converters by switching a plurality of switches connected between the power converters and the batteries in accordance with the calculated mode conversion parameters.
    Type: Application
    Filed: January 25, 2013
    Publication date: February 19, 2015
    Inventor: Joung Hu Park
  • Patent number: 8957636
    Abstract: Provided is a vehicle battery-pack equalization system (100), wherein, in a battery pack (10) to be mounted on a vehicle, and which is comprised of a plurality of unit cells (11) connected in series, each of the unit cells (11) are made to be discharged to equalize the voltages thereof, or the remaining capacities (SOC) thereof. The equalization processing time of each of the unit cells (11) is set to a period of time the result of multiplying the discharging time of the battery pack (10) starting from just before the equalization processing, and the ratio of the difference between the currents discharged by each of the unit cells (11) with respect to the equalization discharging current. In such a way, power consumption during equalization processing can be inhibited.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: February 17, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Kiyoe Ochiai
  • Patent number: 8957625
    Abstract: A method for balancing multiple battery cells which are grouped into multiple battery modules includes: obtaining cell parameters of the battery cells, respectively; calculating an average cell parameter for each of the battery modules according to the cell parameters; identifying a donator module and a receiver module from the battery modules based upon the average cell parameter; and transferring energy from the donator module to the receiver module to balance the battery cells.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: February 17, 2015
    Assignee: O2Micro, Inc.
    Inventors: Guoxing Li, Wei Zhang, Songtao Chen, Chutao Zhang
  • Publication number: 20150042282
    Abstract: In an electric power supply system, a plurality of batteries (405, 406) are connected in series by a switch group (402 to 404, 407 to 409), and a higher voltage and a lower voltage are output through a terminal and a VOL terminal, respectively, and are respectively converted in the voltage thereof by two step-down DC-DC inverters (105, 106). During a discharge operation upon a serial connection, remaining content of the batteries is measured in a period other than the period of discharge from the batteries (105, 106), and the connection mode of the serial connection is controlled based on the remaining content, to control the discharge of the respective batteries up to the discharge capacity.
    Type: Application
    Filed: October 24, 2014
    Publication date: February 12, 2015
    Applicant: LENOVO INNOVATIONS LIMITED (HONG KONG)
    Inventor: Toshiyuki OGA
  • Publication number: 20150035490
    Abstract: A battery system has a battery module including a number M of series-connected batteries. The battery system is further provided with a number N (1<N?M) of charge equalizers, each of which once connected to a battery, causes the battery to be charged and/or discharged to achieve charge equalization. A control device is configured to determine for each battery if it requires charge equalization based on a state of charge (SOC) of the battery, compare a number L of the batteries that require charge equalization and the number M, and based on the comparison result, cause the battery system to be shut down, or the one or more batteries that require charge equalization to be connected to corresponding charge equalizers. A selective switch module is used for connecting the one or more batteries that require charge equalization to corresponding charge equalizers, respectively.
    Type: Application
    Filed: July 2, 2014
    Publication date: February 5, 2015
    Inventors: Saijun MAO, Huiqing WU, Herman Lucas Norbert WIEGMAN, Qunjian HUANG, Ying MEI
  • Publication number: 20150035489
    Abstract: A charging and discharging system is disclosed. The charging and discharging system includes a first cell assembly and a second cell assembly. The first battery cell assembly includes a first cell, a first connecting piece, and a second connecting piece. The second cell assembly includes a second cell, a third connecting piece, and a fourth connecting piece. The first connecting piece and the second connecting piece connect the first cell to a circuit board. The third connecting piece and the fourth connecting piece connect the second cell to the circuit board. A length of the third connecting piece and the fourth connecting piece is greater than a total length of the first connecting piece and the second connecting piece. A resistivity of the third connecting piece and the fourth connecting piece is smaller than a length of the first connecting piece and the second connecting piece.
    Type: Application
    Filed: April 25, 2014
    Publication date: February 5, 2015
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: JEN-JUNG HSIAO
  • Patent number: 8945751
    Abstract: An electrochemical storage device including a plurality of electrochemical cells connected electrically in series. Each cell includes an anode electrode, a cathode electrode and an aqueous electrolyte. The charge storage capacity of the anode electrode is less than the charge storage capacity of the cathode.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: February 3, 2015
    Assignee: Aquion Energy, Inc.
    Inventor: Jay Whitacre
  • Patent number: 8947048
    Abstract: A power supply system includes a first charge storage. A series circuit with a plurality of n charge storage modules is connected between load terminals. A second charge storage includes load terminals. A charge transfer arrangement includes at least one charge transfer unit coupled between one of the charge storage modules and the load terminals of the second charge storage. The charge transfer arrangement is configured to transfer upon request electrical charge from the one charge storage module to the second charge storage.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: February 3, 2015
    Assignee: Infineon Technologies AG
    Inventor: Werner Roessler
  • Patent number: 8941360
    Abstract: Provided are a battery state monitoring circuit and a battery device, in which, even when one secondary battery becomes an overcharged state or an overdischarged state and then a voltage detection circuit operates, power is not consumed in only the one secondary battery. The battery state monitoring circuit includes: a plurality of voltage detection circuits which are provided for a plurality of secondary batteries, respectively, for detecting voltages of the plurality of secondary batteries; and a current bypass circuit provided in each of the plurality of voltage detection circuits, for allowing an operation current of the each of the plurality of voltage detection circuits to flow into a ground terminal. Therefore, when only one secondary battery becomes an overcharged state or an overdischarged state, the battery device operates so that the power of all the secondary batteries is consumed to prevent voltages between the secondary batteries from being unbalanced.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: January 27, 2015
    Assignee: Seiko Instruments Inc.
    Inventors: Hiroshi Saito, Kazuaki Sano
  • Patent number: 8941355
    Abstract: What is provided is a cell balance control device including: a bypass circuit including a direct circuit with a bypass resistance and a switching element, the bypass circuit being connected in parallel to each of a plurality of cells included in a battery; a cell voltage detection unit detecting a cell voltage of each of the plurality of cells; a temperature detection unit detecting a temperature of a substrate on which the bypass circuit is mounted; and a control unit controlling and computing a duty ratio of the switching element based on a value detected by the temperature detection unit and a cell voltage of a discharge-needed cell obtained by the cell voltage detection unit.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: January 27, 2015
    Assignee: Keihin Corporation
    Inventors: Seiji Kamata, Eishin Matsumoto
  • Patent number: 8941507
    Abstract: An flight-safe indicator for a battery displays the flight-safety state of a battery to be transported by an aircraft. The indicator can be easily recognized by ground personnel anywhere regardless of the language they speak or read. The indicator comprises an icon indicating that the battery is safe for flight and would be easily recognized by personnel at an airport. The icon would be placed on the battery or on the battery packaging prior to loading on the aircraft. When the magnitude of power stored on the battery exceeds a safety threshold, the icon changes to an indication that the battery is not safe for transporting by aircraft and the operator may discharge the battery using a load until it reaches a safe level.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: January 27, 2015
    Assignee: Panacis Inc.
    Inventor: Steve Carkner
  • Publication number: 20150022155
    Abstract: A battery cell voltage equalization circuit 1 equalizes the voltages of battery cells B1 and B2 that are connected in series. A switch S1 is electrically connected to the positive electrode of the battery cell B1 via a first path, is electrically connected to the negative electrode of the battery cell B1 via a second path, and electrically connects or disconnects the first and second paths. A switch S2 is electrically connected to the positive electrode of the battery cell B2 via the second path, is electrically connected to the negative electrode of the battery cell B2 via a third path, and electrically connects or disconnects the second and third paths. An inductor L is provided in the second path. Fuses h1 through h3 are provided in the first through third paths, respectively. The switches S1 and S2 are controlled to an ON state alternately.
    Type: Application
    Filed: October 31, 2012
    Publication date: January 22, 2015
    Inventors: Munetaka Yamamoto, Masaaki Suzuki, Mamoru Kuraishi
  • Patent number: 8937457
    Abstract: A system including a plurality of cells connected in series in a rechargeable battery pack and a plurality of cell balancing modules. Each cell balancing module performs voltage balancing of a respective pair of cells. Each cell balancing module includes a communication module to (i) transmit, via a communication link, information about voltages of the respective pair of cells to an adjacent cell balancing module and (ii) receive, via the communication link, from the adjacent cell balancing module, information about voltages of cells corresponding to the adjacent cell balancing module. Each cell balancing module performs, based on the information received from the adjacent cell balancing module, the voltage balancing in response to a voltage difference between any of the plurality of cells being greater than or equal to a predetermined threshold instead of performing the voltage balancing based on a difference between voltages of the respective pair of cells.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: January 20, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: Sehat Sutardja, Pantas Sutardja
  • Patent number: 8933665
    Abstract: A system that balances voltages between battery banks. The system includes battery banks, including a first bank and a second bank, and a first capacitor. The system also includes a first set of switching devices which selectively couple first and second terminals of the first capacitor to first and second terminals of the first bank, and to first and second terminals of the second bank. The system includes a clocking circuit which generates clock signals with substantially non-overlapping first and second clock phases. This clocking circuit is configured so that during the first phase the first and second terminals of the first capacitor are coupled to the first and second terminals of the first bank, respectively, and during the second phase the first and second terminals of the first capacitor are coupled to the first and second terminals of the second bank, respectively.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: January 13, 2015
    Assignee: Apple Inc.
    Inventors: William C. Athas, Thomas C. Greening
  • Patent number: 8928282
    Abstract: The present invention is a control system for an assembled battery that controls an assembled battery comprising a plurality of cells, including: a bypass circuit connected in parallel to each cell of the cells, and comprising a switching element and a resistor connected in series; and a control circuit that controls a bypass current flowing in the bypass circuit by opening and closing the switching element, in order to discharge the cell; wherein the bypass circuit is set so that a current of a same magnitude as a self-discharge current in a predetermined overcharged states of the cell flow in the bypass circuit.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: January 6, 2015
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Akihiko Kudo, Kenji Nakai
  • Patent number: 8924056
    Abstract: A system and method is provided for balancing a storage battery for an automotive vehicle. The battery is of the type including a plurality of storage cells. The system includes a thermoelectric device and a controller. The thermoelectric device receives thermal energy and converts the thermal energy into electric energy. The controller determines a subset of the storage cells in the battery to be charged based on an amount of electric charge in each of the storage cells. Furthermore, the controller causes the electric energy to be distributed to each storage cell in the subset in an effort to balance the battery in the vehicle.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: December 30, 2014
    Assignee: Ford Global Technologies, LLC
    Inventors: Steven F. Chorian, Jin Wang
  • Patent number: 8922165
    Abstract: Embodiments of an electronic circuit for monitoring a battery stack enable cell balancing while conserving pin-count of the circuit package. The illustrative electronic circuit comprises a battery monitoring integrated circuit configured for monitoring a plurality of cells in the battery stack. The battery monitoring integrated circuit is arranged to share a common node pin between two adjacent battery cells in the battery stack for the purpose of cell balancing.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: December 30, 2014
    Assignee: Freescale Semiconductor, Inc.
    Inventor: Peter J. Bills
  • Patent number: 8922166
    Abstract: A system for balancing a plurality of battery pack system modules connected in series may include in each battery pack system module a controller configured to detect that the first system module has reached a first state of charge; activate the first charge switch to physically disconnect and to prevent further charging of the first system module after detecting the first state of charge; discharge the plurality of cells after activating the first charge switch to balance the first system module with a second system module coupled to the first system module; de-activate the first charge switch after discharging the plurality of battery cells; and charge the plurality of cells after de-activating the first charge switch.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: December 30, 2014
    Assignee: Southwest Electronic Energy Corporation
    Inventors: David Allen White, Claude Leonard Benckenstein, Jr.
  • Patent number: 8922167
    Abstract: Rechargeable battery systems and rechargeable battery system operational methods are described. According to one aspect, a rechargeable battery system includes a plurality of rechargeable battery cells coupled between a plurality of terminals and shunting circuitry configured to shunt charging electrical energy around respective ones of the rechargeable battery cells during charging of the rechargeable battery cells from substantially discharged states of charge of the rechargeable battery cells to substantially charged states of charge of the rechargeable battery cells.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: December 30, 2014
    Assignee: Valence Technology, Inc.
    Inventor: Peter Nysen
  • Patent number: 8917060
    Abstract: A secondary cell control system includes a plurality of cells; a charging circuit section and a discharging circuit section. The charging circuit section charges cells selected from among said plurality of cells, and the discharging circuit section discharges cells selected from among said plurality of cells.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: December 23, 2014
    Assignees: Mitsubishi Heavy Industries, Ltd., Kyushu Electric Power Co., Inc.
    Inventors: Tetsuro Shigemizu, Takehiko Nishida, Katsuo Hashizaki, Hidehiko Tajima, Katsuaki Kobayashi, Kazuyuki Adachi, Shinji Murakami, Yoshihiro Wada, Hiroyuki Shibata, Kouji Kurayama
  • Patent number: 8917059
    Abstract: Provided is an inter-module voltage balance correcting circuit of a power storage system including a plurality of storage modules connected in series, each of the storage modules including a plurality of storage cells connected in series. The inter-module voltage balance correcting circuit includes a resistance voltage dividing circuit (R1-R2) that equally divides a series voltage across a first storage module and a second storage module connected in series; and a pair of transistors that are turned ON/OFF complementarily based on a voltage (Vp1-Vp2) appearing between an intermediate connecting point (p2) between the storage modules M1, M2 in series and a voltage dividing point p1 of the resistance voltage dividing circuit, and a bypass discharge resistive element is selectively connected to modules by turning ON/OFF the complementary transistors.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: December 23, 2014
    Assignee: FDK Corporation
    Inventor: Fumiaki Nakao
  • Publication number: 20140370940
    Abstract: A plurality of battery cells (100) are connected in series to each other. A temperature measurement unit (300) measures temperatures of two or more battery cells (100). A battery control unit (400) controls charge and discharge of the battery cells (100) on the basis of the temperatures measured by the temperature measurement unit (300). In addition, when the charge of the battery cells (100) is performed or the discharge of the battery cells (100) is performed, the battery control unit (400) specifies a lowest temperature cell having the lowest temperature and a highest temperature cell having the highest temperature, on the basis of the temperatures measured by the temperature measurement unit (300). In addition, the battery control unit (400) continues the charge or discharge, as it is, when a first condition in which a temperature difference ?T between the highest temperature cell and the lowest temperature cell is equal to or greater than a reference value T1 is not satisfied.
    Type: Application
    Filed: February 8, 2013
    Publication date: December 18, 2014
    Applicant: NEC ENERGY DEVICES, LTD.
    Inventor: Tadahiro Yoshida
  • Patent number: 8912756
    Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: December 16, 2014
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
  • Publication number: 20140361746
    Abstract: The present invention provides a charge/discharge control circuit and a battery device capable of detecting an intermediate terminal disconnection without causing the balance between battery voltages to collapse and shortening the service life of the battery device. A charge/discharge control circuit which controls charging/discharging of a plurality of secondary batteries connected in series is equipped with intermediate terminal disconnection detecting circuits each of which is provided between a positive electrode terminal and a negative electrode terminal of each secondary battery and detects an intermediate terminal disconnection of each intermediate terminal by intermittently equal detection currents.
    Type: Application
    Filed: May 28, 2014
    Publication date: December 11, 2014
    Applicant: Seiko Instruments Inc.
    Inventor: Hiroshi SAITO
  • Patent number: 8907676
    Abstract: A power cell system such as a fuel cell system, with apparatus for detecting a discontinuity. A power cell system, e.g. a fuel cell system, includes a plurality of power cells, e.g. fuel cells and plurality of first resistances, the plurality of power cells and first resistances being connected in the form of a ladder circuit, and electronic filters each having a first connection to a first node between two of the first resistances, each electronic filter having a second resistance and a charge storage device connected to the second resistance.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: December 9, 2014
    Assignee: Vito NV
    Inventor: Peter Coenen
  • Patent number: 8907627
    Abstract: A balancer circuit for a cell in a rechargeable battery, having connecting terminals for connection of the balancer circuit to the cell. A first resistor is electrically connected to one of the connecting terminals and a voltage switch is arranged in series with the first resistor and electrically connected to the other one of the connecting terminals. The voltage switch, e.g., an adjustable voltage reference circuit, is operable to shunt a balancing current through the first resistor when a load voltage sensed over the connecting terminals is higher than a threshold voltage.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: December 9, 2014
    Assignee: Super B B.V.
    Inventor: Marinus Hendrikus Doornekamp
  • Publication number: 20140354232
    Abstract: An accumulator battery, comprising at least: first and second stages electrically connected in series, each stage including at least first to third accumulators electrically connected in parallel. There are at least first and second current limiters via which the first to third accumulators of said first stage are connected in parallel and via which the first to third accumulators of said second stage are connected in parallel.
    Type: Application
    Filed: November 14, 2012
    Publication date: December 4, 2014
    Inventors: Sebastien Carcouet, Bruno Beranger, Daniel Chatroux
  • Patent number: 8902072
    Abstract: Provided are an apparatus and a method for diagnosing an abnormality in a cell balancing circuit. The apparatus may include a plurality of cell balancing circuits respectively connected to a plurality of battery cells included in a battery pack for balancing the voltages of the battery cells, a diagnosis resistor respectively installed between the cell balancing circuit and a cathode terminal and an anode terminal of the corresponding battery cell, a voltage measuring unit for measuring a voltage difference of the balancing circuit corresponding to each of the battery cells, and a control unit for turning on or off a cell balancing circuit to be diagnosed and for determining whether there is an abnormality in the cell balancing circuit to be diagnosed, based on a variation pattern of a voltage difference of a cell balancing circuit adjacent to the cell balancing circuit to be diagnosed that is measured by the voltage measuring unit.
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: December 2, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Sang-Hoon Lee, Dal-Hoon Lee, Ju-Hyun Kang, Jee-Ho Kim
  • Patent number: 8901889
    Abstract: A discharge control apparatus includes: two or more battery packs equipped with a secondary battery; and a main control unit controlling discharge from the battery packs, in which the two or more battery packs are controlled such that at least one of the battery packs selected by the main control unit discharges, and when switching the battery packs so that only the selected battery pack discharges, the main control unit controls switching such that the battery pack after switching discharges and then the battery pack before switching stops discharge.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: December 2, 2014
    Assignee: Sony Corporation
    Inventor: Yoshihito Ishibashi
  • Patent number: 8901886
    Abstract: The present inventions, in certain aspects, are directed to techniques and/or circuitry to charge a battery the method comprises (i) charging the battery via a charging sequence, wherein charging the battery includes: (a) applying a plurality of charge signals, and (b) applying one or more discharge signals wherein, in response thereto, the battery outputs electrical energy. In certain embodiments, the electrical energy output by the battery in response to the discharge signals is stored (for example, in a capacitor and/or second battery). The present inventions are also directed to, among other things, an apparatus to charge a battery comprising charging circuitry including: (i) a current source to generate a plurality of charge signals, and (ii) a current sink to generate one or more discharge signals, wherein, in response thereto, the battery outputs electrical energy.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: December 2, 2014
    Assignee: Qnovo Inc.
    Inventors: Fred Berkowitz, Nadim Maluf, Dania Ghantous
  • Patent number: 8896155
    Abstract: In an electric power supply system, a plurality of batteries (405, 406) are connected in series by a switch group (402 to 404, 407 to 409), and a higher voltage and a lower voltage are output through a terminal and a VOL terminal, respectively, and are respectively converted in the voltage thereof by two step-down DC-DC inverters (105, 106). During a discharge operation upon a serial connection, remaining content of the batteries is measured in a period other than the period of discharge from the batteries (105, 106), and the connection mode of the serial connection is controlled based on the remaining content, to control the discharge of the respective batteries up to the discharge capacity.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: November 25, 2014
    Assignee: Lenovo Innovations Limited (Hong Kong)
    Inventor: Toshiyuki Oga
  • Patent number: 8896315
    Abstract: A battery cell balancing system is operable to utilize a relatively small number of transformers interconnected with a battery having a plurality of battery cells to selectively charge the battery cells. Windings of the transformers are simultaneously driven with a plurality of waveforms whereupon selected battery cells or groups of cells are selected and charged. A transformer drive circuit is operable to selectively vary the waveforms to thereby vary a weighted voltage associated with each of the battery cells.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: November 25, 2014
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Francis J. Davies
  • Patent number: 8884584
    Abstract: A multi-series battery control system comprises a plurality of unit battery cell of which unit consists of multiple battery cells connected in series; a plurality of control IC comprising a control circuit for controlling the unit battery cell; a main controller that sends and receives signal to/from the control ICs via an insulation; means for sending an abnormality signal, which represents the existence or the absence of abnormality of the control ICs or the battery cells, to the main controller from the control ICs, responding to the first signal outputted from the main controller via the insulation; and means for searching contents of the abnormality in the control ICs or the battery cells and sending the abnormality contents signal based on the search, to the main controller from the control ICs, responding to the second signal outputted from the main controller via the insulation.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: November 11, 2014
    Assignee: Shin-Kobe Electric Machinery Co., Ltd.
    Inventors: Akihiko Emori, Shigeyuki Yoshihara, Kazuyoshi Sasazawa, Tatsuo Horiba, Akihiko Kudo
  • Patent number: 8884585
    Abstract: Batteries, battery systems, battery submodules, battery operational methods, battery system operational methods, battery charging methods, and battery system charging methods are described. According to one aspect, a battery includes a first battery terminal, a second battery terminal, and a plurality of submodules individually comprising a first submodule terminal, a second submodule terminal, a plurality of rechargeable cells electrically coupled between the first and second submodule terminals, and switching circuitry configured to electrically couple one of the first and second battery terminals with one of the first and second submodule terminals of one of the submodules during an engaged mode of operation of the one of the submodules and to electrically isolate the one of the first and second battery terminals from the one of the first and second submodule terminals of the one of the submodules during a disengaged mode of operation of the one of the submodules.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: November 11, 2014
    Assignee: Valence Technology, Inc.
    Inventors: Russell M. Troxel, Joel E. Sandahl
  • Publication number: 20140327400
    Abstract: A battery system monitoring apparatus for monitoring a cell group having a plurality of battery cells, and includes a cell controller IC which monitors and controls the states of the plurality of battery cells. A battery controller controls the cell controller IC and a plurality of voltage detection lines measure the voltage across the terminals of the battery cell. The voltage detection lines connect positive and negative electrodes of the battery cell, respectively, to a plurality of voltage input terminals of the cell controller IC. A power line connects the positive electrode of the battery cell having the highest potential among the plurality of battery cells to a power supply terminal of the cell controller IC and a ground line which connects the negative electrode of the battery cell having the lowest potential among the plurality of battery cells to a ground terminal of the cell controller IC.
    Type: Application
    Filed: October 20, 2011
    Publication date: November 6, 2014
    Applicant: HITACHI VEHICLE ENERGY, LTD.,
    Inventors: Akihiko Kudo, Mutsumi Kikuchi, Akihiko Emori
  • Patent number: 8878541
    Abstract: A battery voltage monitoring circuit includes a first power supply terminal to be connected to the positive terminal of a battery pack having rechargeable cells connected in series; a first supply voltage sensing terminal to be connected to the positive terminal of the battery pack; a first resistor connected between the first power supply terminal and the first supply voltage sensing terminal; a second supply voltage sensing terminal to be connected to the negative terminal of a first rechargeable cell of the rechargeable cells, the first rechargeable cell being on the positive terminal side of the battery pack and connected to the positive terminal of the battery pack; a second resistor connected between the second supply voltage sensing terminal and the first power supply terminal; and a first comparator configured to compare a voltage at the first power supply terminal and a voltage at the first supply voltage sensing terminal.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: November 4, 2014
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Akihiro Nishizawa, Takashi Takeda
  • Patent number: 8878493
    Abstract: An apparatus is provided, which monitors an operation state of a battery composed of a plurality of cells mutually connected in series. In this apparatus, a cell voltage of each of the plurality of cells is detected as information indicating an operation state of the battery. Based on the detected cell voltages, an operation state is monitored for a cell having a highest cell voltage and a cell having a lowest cell voltage among the plurality of cells.
    Type: Grant
    Filed: October 18, 2011
    Date of Patent: November 4, 2014
    Assignee: Denso Corporation
    Inventor: Tetsuya Kobayashi
  • Patent number: 8872477
    Abstract: A battery pack and a method of operating the battery pack are disclosed. The battery pack includes a plurality of battery cells and is configured to open a terminal of the battery if an open circuit is detected in a line connecting battery cells.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: October 28, 2014
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jongwoon Yang, Euijeong Hwang, Susumu Segawa, Jinwan Kim, Hanseok Yun, Beomgyu Kim
  • Patent number: 8872478
    Abstract: Embodiments of the invention provided circuits and methods for balancing battery cells. According to a first embodiment, a cell balancing circuit includes an auxiliary current path for controlling a conductance status of a shunt path. According to a second embodiment, a cell balancing circuit utilizes a total voltage of multiple neighboring cells in a battery pack to generate a current. Based on the current, a voltage drop is generated to conduct a shunt path corresponding to one cell of the neighboring cells. According to a third embodiment, a cell balancing circuit utilizes a total voltage of multiple neighboring cells in a battery pack to generate a current. Based on the current, a voltage drop is generated to conduct a shunt path corresponding to one cell of the neighboring cells. The cell balancing circuit can turn on multiple internal switches at the same time to balance multiple neighboring cells simultaneously.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: October 28, 2014
    Assignee: O2Micro Inc.
    Inventor: Guoxing Li
  • Patent number: 8872476
    Abstract: The present invention discloses a charging management system and a charger with such charging management system. The charging management system includes a first signal-output port, a second signal-output port, a third signal-output port and a controller electrically connected with the first, second and third signal-output ports. The first and second signal-output ports are adapted for outputting first and second control signals representing first and second charging currents, respectively, to a charging circuit. The third signal-output port is adapted for outputting a third control signal representing a variable third charging current to the charging circuit. The controller controls the charging management system to operate under at least one of two modes. In the first mode, the controller alternately controls the first and second signal-output ports to output the first and second control signals. In the second mode, the controller only controls the third signal-output port to output the third control signal.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: October 28, 2014
    Assignees: Suzhou Golden Crown New Energy Co., Ltd, Golden Crown New Energy (HK) Limited
    Inventors: Jen-Chin Huang, Zhijian Liu