公开(公告)号：US20200014219A1

公开(公告)日：2020-01-09

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

IPC: H02J7/00

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.

公开(公告)号：US20140058687A1

公开(公告)日：2014-02-27

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

IPC: G01R31/36

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.

Abstract translation: 同时计算RESS的隔离电阻和y电容的系统和方法可以包括以下步骤：将第一信号注入RESS; 响应于所述第一信号的注入，记录来自所述RESS的输出信号; 将第一信号与输出信号相乘以确定第一乘积; 将第二信号与所述输出信号相乘以确定第二乘积，其中所述第二信号与所述第一信号正交; 过滤第一个产品以确定第一个常数; 过滤第二产品以确定第二常数; 处理第一常数以确定y电容值; 并处理第二常数以确定隔离电阻值。

公开(公告)号：US12085625B2

公开(公告)日：2024-09-10

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.

公开(公告)号：US09194904B2

公开(公告)日：2015-11-24

申请号：US13922930

申请日：2013-06-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Wang ,  Andrew K. Chandler ,  Paul W. Kelley ,  Richard H. Miller

IPC: H02H3/00 ,  H02H7/26 ,  G01R31/02 ,  G01R19/165

CPC classification number: G01R31/025 ,  G01R19/16542

Abstract: System and methods for detecting electrical leakages in a battery sensing are presented. In certain embodiments, the systems and methods allow a vehicle battery sensing circuit and/or other associated system to detect certain electrical leakages and implement one or more actions to protect vehicle systems from damage resulting from such leakages.

Abstract translation: 提出了一种用于检测电池感测中的电气泄漏的系统和方法。 在某些实施例中，系统和方法允许车辆电池感测电路和/或其他相关联的系统检测某些电气泄漏并且实施一个或多个动作以保护车辆系统免受由于这种泄漏而造成的损坏。