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公开(公告)号：US20220037892A1
公开(公告)日：2022-02-03
申请号：US16945558
申请日：2020-07-31
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Sara R. Beyer , Fang Wang , Tao Wang , Jeffrey Michael Setting
IPC: H02J7/00
Abstract: A battery system with battery cell groups arranged in battery modules includes a controller network configured to monitor each module. The network includes multiple cell monitoring units (CMUs); each CMU electrically connected to one battery module and configured to process cell data for the respective battery cell groups. The network also includes multiple voltage sensors on each CMU—each sensor configured to detect voltage across one respective cell group, and multiple microchips—each microchip arranged on one CMU in communication with the respective voltage sensors. Each microchip is programmed with an algorithm configured to receive detected voltage data from the respective sensors at predetermined time intervals over a predetermined timeframe and store the voltage data. The algorithm is additionally configured to determine a discharge rate of each associated cell group using the stored data and determine degradation of each cell group using the determined respective discharge rate.
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公开(公告)号：US10974616B2
公开(公告)日：2021-04-13
申请号：US16015896
申请日：2018-06-22
Applicant: GM Global Technology Operations LLC
Inventor： Fang Wang , Jeffrey Johnson , Theodore T. Kim , Tao Wang , Janpreet S. Basi
Abstract: A high-voltage electrical system includes a high-voltage electrical bus, a low-voltage controller performing battery management system (BMS) functions, and a rechargeable energy storage system (RESS) connected to the HV electrical bus. The RESS has contactors connected to the voltage rails, a battery pack, a current sensor outputting a voltage signal indicative of pack current, cell monitoring units (CMUs) connected to designated battery cells that measure corresponding cell voltages, and voltage isolation hardware between the CMUs and the LV controller. The voltage isolation hardware includes the contactors and may include a transformer. The RESS and LV controller are connected via LV serial connections such that the LV controller performs the designated BMS functions, including monitoring the pack current and controlling an open/closed state of the contactors. A powertrain system includes the electrical system, an electric machine, and a coupled load.
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公开(公告)号：US09696384B2
公开(公告)日：2017-07-04
申请号：US13973362
申请日：2013-08-22
Applicant: GM Global Technology Operations LLC
Inventor： Fang Wang , Wei Liu , Jochen Lenz , Peter Andres
CPC classification number: G01R31/3624 , G01R27/025 , G01R31/006 , G01R31/025 , H01M2/1094 , H01M10/4228 , H01M10/48 , H01M2220/20
Abstract: A system and method of simultaneously calculating an isolation resistance and a y-capacitance of a RESS may include the steps of: injecting a first signal into a RESS; recording an output signal from the RESS in response to the injection of the first signal; multiplying the first signal with the output signal to determine a first product; multiplying a second signal with the output signal to determine a second product wherein the second signal is orthogonal to the first signal; filtering the first product to determine a first constant; filtering the second product to determine a second constant; processing the first constant to determine a y-capacitance value; and processing the second constant to determine an isolation resistance value.
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公开(公告)号：US20240085490A1
公开(公告)日：2024-03-14
申请号：US17941594
申请日：2022-09-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Fang Wang , Yue-Yun Wang , Anthony P. Tata
IPC: G01R31/396 , B60L3/00 , B60L58/30 , G01R31/36 , G01R31/3835 , G01R31/388 , G01R31/392
CPC classification number: G01R31/396 , B60L3/0046 , B60L58/30 , G01R31/3648 , G01R31/3835 , G01R31/388 , G01R31/392
Abstract: A system for monitoring a battery module having a plurality of cells includes a sensor adapted to obtain respective cell voltages of the plurality of cells. The controller is adapted to receive data from the sensor, the controller having a processor and tangible, non-transitory memory on which instructions are recorded. The controller is configured to sort the respective cell voltages to create a voltage ranking. The voltage ranking is repeated with at least one new set of cell voltage readings obtained at a predefined checking frequency. Differences in the voltage ranking of the plurality of cells are analyzed. The controller is adapted to control operation of the battery module based in part on differences in the voltage ranking. The controller may be adapted to predict likelihood of a thermal runway event based in part on the differences in the voltage ranking.
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公开(公告)号：US11830990B2
公开(公告)日：2023-11-28
申请号：US16773558
申请日：2020-01-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Fang Wang , Fiona E. Meyer-Teruel , Tao Wang , Thomas Timpf, Jr. , Andrew C. Baughman
IPC: H01M10/48 , H02J7/00 , G01K1/02 , G01K13/00 , B60L50/64 , B60L58/24 , H02P27/06 , H01M10/42 , B60K6/28 , B60K6/26
CPC classification number: H01M10/486 , B60L50/64 , B60L58/24 , G01K1/026 , G01K13/00 , H01M10/4257 , H02J7/0013 , H02J7/00032 , H02J7/0047 , H02P27/06 , B60K6/26 , B60K6/28 , B60Y2200/91 , B60Y2200/92 , H01M2010/4271 , H01M2010/4278 , H01M2220/20
Abstract: A battery system includes a rechargeable energy storage system (RESS) having battery cells, and a battery controller network configured to execute two-level logic to detect a thermal runaway condition. The network includes RESS-embedded cell monitoring units (CMUs) electrically connected to a respective cell group, and measuring and wirelessly transmitting cell data. A battery control module (BCM) is in communication with the CMUs. Thermal runaway sensors are mounted on the CMUs and/or the BCM. A master controller connected to the BCM includes a thermal runaway detection algorithm configured to detect a thermal runaway condition occurring within the RESS. The BCM uses data from the CMUs and thermal runaway sensors to execute first logic level which determines when to wake up the master controller. The master controller, in response to receipt of a wakeup signal, executes a second logic level to execute the algorithm.
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Patent Agency Ranking
6.发明授权公开(公告)号：US11146076B2
公开(公告)日：2021-10-12
申请号：US16030083
申请日：2018-07-09
Applicant: GM Global Technology Operations LLC
Inventor： Tamara R. Thomson , Fang Wang , Tao Wang , Theodore T. Kim , Larry T. Nitz
Abstract: A battery system includes a battery module, an active cell balancing circuit, and a battery controller. Each cell has diametrically-opposed positive and negative cell tabs. The circuit includes voltage sensors and, at each end of the battery module, first and second tiers of switches and an energy storage element. Each voltage sensor is located between a different pair of adjacent cells. The controller receives measured voltages from the sensors indicative of an electric potential between adjacent battery cells. Responsive to the measured voltages, the controller commands the first tier to selectively connect or disconnect designated pairs of cells to the corresponding second tier. The controller also commands the second tier to selectively connect or disconnect the designated cells to a corresponding energy storage element. This action shuttles energy between the designated pairs of battery cells to balance a state of charge.
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公开(公告)号：US20210234209A1
公开(公告)日：2021-07-29
申请号：US16773558
申请日：2020-01-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Fang Wang , Fiona E. Meyer-Teruel , Tao Wang , Thomas Timpf, JR. , Andrew C. Baughman
Abstract: A battery system includes a rechargeable energy storage system (RESS) having battery cells, and a battery controller network configured to execute two-level logic to detect a thermal runaway condition. The network includes RES S-embedded cell monitoring units (CMUs) electrically connected to a respective cell group, and measuring and wirelessly transmitting cell data. A battery control module (BCM) is in communication with the CMUs. Thermal runaway sensors are mounted on the CMUs and/or the BCM. A master controller connected to the BCM includes a thermal runaway detection algorithm configured to detect a thermal runaway condition occurring within the RESS. The BCM uses data from the CMUs and thermal runaway sensors to execute first logic level which determines when to wake up the master controller. The master controller, in response to receipt of a wakeup signal, executes a second logic level to execute the algorithm.
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公开(公告)号：US10886758B2
公开(公告)日：2021-01-05
申请号：US16057019
申请日：2018-08-07
Applicant: GM Global Technology Operations LLC
Inventor： Brandon M. Thayer , Fang Wang , Charles Hua , Andrew K. Chandler
Abstract: An electrical system includes a battery disconnect unit (BDU) connected to a rechargeable energy storage system (RESS) via a high-voltage bus. The BDU has one or more contactors that close responsive a low-voltage drive current to thereby connect the RESS to the high-voltage bus. A low-voltage drive circuit conducts the drive current to the contactor(s). Opening of a low-voltage connection interrupts the drive current and causes the contactor(s) to transition from the closed state to an open state. The contactor(s) open in response to interruption of the drive current to thereby disconnect the RESS. The contactor(s) may be closed again after a lockout safety procedure, such that reestablishing the electrical connection does not itself re-energize the high-voltage bus. An electrified powertrain includes a transmission, electric machine, power inverter module, and the above-noted electrical system.
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公开(公告)号：US20200052508A1
公开(公告)日：2020-02-13
申请号：US16057019
申请日：2018-08-07
Applicant: GM Global Technology Operations LLC
Inventor： Brandon M. Thayer , Fang Wang , Charles Hua , Andrew K. Chandler
Abstract: An electrical system includes a battery disconnect unit (BDU) connected to a rechargeable energy storage system (RESS) via a high-voltage bus. The BDU has one or more contactors that close responsive a low-voltage drive current to thereby connect the RESS to the high-voltage bus. A low-voltage drive circuit conducts the drive current to the contactor(s). Opening of a low-voltage connection interrupts the drive current and causes the contactor(s) to transition from the closed state to an open state. The contactor(s) open in response to interruption of the drive current to thereby disconnect the RESS. The contactor(s) may be closed again after a lockout safety procedure, such that reestablishing the electrical connection does not itself re-energize the high-voltage bus. An electrified powertrain includes a transmission, electric machine, power inverter module, and the above-noted electrical system.
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公开(公告)号：US20190389316A1
公开(公告)日：2019-12-26
申请号：US16015896
申请日：2018-06-22
Applicant: GM Global Technology Operations LLC
Inventor： Fang Wang , Jeffrey Johnson , Theodore T. Kim , Tao Wang , Janpreet S. Basi
Abstract: A high-voltage electrical system includes a high-voltage electrical bus, a low-voltage controller performing battery management system (BMS) functions, and a rechargeable energy storage system (RESS) connected to the HV electrical bus. The RESS has contactors connected to the voltage rails, a battery pack, a current sensor outputting a voltage signal indicative of pack current, cell monitoring units (CMUs) connected to designated battery cells that measure corresponding cell voltages, and voltage isolation hardware between the CMUs and the LV controller. The voltage isolation hardware includes the contactors and may include a transformer. The RESS and LV controller are connected via LV serial connections such that the LV controller performs the designated BMS functions, including monitoring the pack current and controlling an open/closed state of the contactors. A powertrain system includes the electrical system, an electric machine, and a coupled load.
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