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

IPC: H01M10/48 ,  H01M10/42 ,  H02P27/06 ,  H02J7/00 ,  G01K1/02 ,  G01K13/00 ,  B60L50/64 ,  B60L58/24

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.

公开(公告)号：US20220069376A1

公开(公告)日：2022-03-03

申请号：US17007981

申请日：2020-08-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Andrew C. Baughman ,  Thomas Timpf, JR. ,  Christine E. Cabrera

IPC: H01M10/633 ,  H01M10/613 ,  H01M10/625 ,  H01M10/42 ,  H01M10/48

Abstract: A battery system with cell groups arranged in modules and with plurality of modules arranged in individual battery sub-packs includes a controller network configured to monitor the sub-packs. The network includes a plurality of cell monitoring units (CMUs); each CMU connected to one module for processing data for respective cell groups. The network also includes multiple voltage sensors on each CMU, with each sensor detecting voltage across one cell group. The network additionally includes an electronic controller programmed with an algorithm and in wireless communication with each CMU. The algorithm identifies when electrical power is disconnected from the RESS and directs electrical current through a selected sub-pack after power is restored. The algorithm also interrogates voltage sensors of a particular CMU, detects a change in voltage triggered by the current, and records a cross-reference between the particular CMU and the selected sub-pack when the change in voltage is detected.