公开(公告)号：US20210104793A1

公开(公告)日：2021-04-08

申请号：US16595737

申请日：2019-10-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Elaine E. Parkanzky ,  Karl C. Dorgan ,  Faruk Sohag ,  Rajesh K. Bhagirath ,  Edgar P. Calderon ,  John M. Moote

IPC: H01M10/6569 ,  H05K7/20 ,  H01M10/613 ,  H01M10/658

Abstract: A thermal barrier for use in a power module assembly having at least one battery cell and corresponding method of forming. The thermal barrier includes at least one compressible member having one or more pockets. A first layer and a second layer are positioned adjacent to the compressive member at a first side and a second side, respectively. The thermal barrier includes one or more phase change materials configured to be deposited into the pockets. The phase change materials are configured to undergo an endothermic phase change reaction when a temperature is at or above an activation temperature. The first layer and the second layer may be configured to at least partially reflect radiant heat. In one example, the phase change materials include a bicarbonate salt.

公开(公告)号：US20230299365A1

公开(公告)日：2023-09-21

申请号：US17695985

申请日：2022-03-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Herman K. Phlegm ,  Srikanth Arisetty ,  Rajesh K. Bhagirath ,  Edgar P. Calderon

IPC: H01M10/42 ,  H01M50/367 ,  H01M10/48

CPC classification number: H01M10/4207 ,  H01M50/367 ,  H01M10/482

Abstract: A method for constant pressure regulation of battery cells includes disposing the cells in a stacked arrangement within a battery cell placement volume of an apparatus configured to maintain a constant pressure on the cells, providing a gas pressure within a chamber of the apparatus, thereby causing an initial pressure to be applied on the battery cells, and detecting an expansion of the battery cells during a predetermined timespan using a linear displacement sensor. During the predetermined timespan, if the detected expansion is less than a maximum allowable expansion minus a predetermined measurement error, then the gas pressure within the chamber is increased, and if the detected expansion is greater than the maximum allowable expansion plus the predetermined measurement error, then the gas pressure within the chamber is decreased. An apparatus for constant pressure regulation of battery cells is also provided.

公开(公告)号：US20250118851A1

公开(公告)日：2025-04-10

申请号：US18483201

申请日：2023-10-09

Applicant: GM Global Technology Operations LLC

Inventor： Daniel Philip Pothen ,  Paul Buchholz ,  Tejas R. Bhavsar ,  Rajesh K. Bhagirath

IPC: H01M50/291 ,  B60L50/64 ,  H01M50/209 ,  H01M50/242 ,  H01M50/249

Abstract: A battery assembly includes a first battery cell including a first surface and a first surface section. The first surface is opposite the second surface. A second battery cell includes a second surface and a second surface section. The second surface section is opposite of the second surface. A tunable spring member is provided between the first battery cell and the second battery cell. The tunable spring member includes a first spring surface facing the first surface section and a second spring surface facing the second surface. The tunable spring member includes a plurality of energy absorption zones disposed across the first spring surface and the second spring surface. A first portion of the plurality of energy absorption zones establish a first spring rate, and a second portion of the plurality of energy absorption zones establish a second spring rate that is distinct from the first spring rate.

公开(公告)号：US11183721B2

公开(公告)日：2021-11-23

申请号：US16595737

申请日：2019-10-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Elaine E. Parkanzky ,  Karl C. Dorgan ,  Faruk Sohag ,  Rajesh K. Bhagirath ,  Edgar P. Calderon ,  John M. Moote

IPC: H01M10/38 ,  H01M10/6569 ,  H01M10/658 ,  H01M10/613 ,  H05K7/20

Abstract: A thermal barrier for use in a power module assembly having at least one battery cell and corresponding method of forming. The thermal barrier includes at least one compressible member having one or more pockets. A first layer and a second layer are positioned adjacent to the compressive member at a first side and a second side, respectively. The thermal barrier includes one or more phase change materials configured to be deposited into the pockets. The phase change materials are configured to undergo an endothermic phase change reaction when a temperature is at or above an activation temperature. The first layer and the second layer may be configured to at least partially reflect radiant heat. In one example, the phase change materials include a bicarbonate salt.