Battery pack

Patent metadata

Field	Value
Publication number	US-2024258633-A1
Application number	US-202418425902-A
Country	US
Kind code	A1
Filing date	Jan 29, 2024
Priority date	Jan 31, 2023
Publication date	Aug 1, 2024
Grant date	—

Abstract

A battery pack disclosed herein includes a plurality of rectangular secondary batteries that are disposed along an arrangement direction, and a spacer that is disposed between the rectangular secondary batteries that are adjacent in the arrangement direction. The spacer includes a first part and a second part, the first part has an elastic modulus of 1 MPa or more and 10 MPa or less, the second part includes a porous part, and 50 mass % or more of the entire porous part is occupied by a material that satisfies both the following conditions: a classification of heat resistance based on JIS K 6380 (2014) is E or more; and the elastic modulus in the arrangement direction is 0.02 MPa or more and 0.9 MPa or less.

First claim

What is claimed is:

1 . A battery pack comprising:
a plurality of rectangular secondary batteries that are disposed along a predetermined arrangement direction; and a spacer that is disposed between the rectangular secondary batteries that are adjacent in the arrangement direction, wherein the spacer includes a first part and a second part that are stacked in the arrangement direction, the first part has an elastic modulus of 1 MPa or more and 10 MPa or less, the second part includes a porous part, 50 mass % or more of the entire porous part is occupied by a material that satisfies both the following conditions: (1) a classification of heat resistance based on JIS K 6380 (2014) is E or more; and (2) the elastic modulus is 0.02 MPa or more and 0.9 MPa or less, and the elastic modulus is a value obtained as an inclination of an approximation line in a range of a compression ratio from 1 to 20% from a compression load-compression ratio curve (horizontal axis:compression ratio, vertical axis:compression load) formed by performing compression until a compression load becomes 3.9 MPa in the arrangement direction at a compression speed of 12 kPa/min.

2 . The battery pack according to claim 1 , wherein silicone rubber occupies 50 mass % or more of the entire porous part.

3 . The battery pack according to claim 1 , wherein the elastic modulus of the material forming the porous part is 0.02 MPa or more and 0.2 MPa or less.

4 . The battery pack according to claim 1 , wherein the porous part has a porosity of 25 vol % or more.

5 . The battery pack according to claim 1 , wherein the porous part has a porosity of 50 vol % or more.

6 . The battery pack according to claim 1 , wherein an area of a surface of the first part that is orthogonal to the arrangement direction is less than or equal to an area of a surface of the second part that is orthogonal to the arrangement direction.

7 . The battery pack according to claim 1 , wherein a part of the first part is disposed in the second part.

8 . The battery pack according to claim 1 , wherein the first part and the second part are integrated by a binding member.

Assignees

• Prime Planet Energy & Solutions Inc

Inventors

• Iwata Ryosuke
• Matsuta Shigeki
• Omura Tetsuji

Classifications

• H01M10/658

  by thermal insulation or shielding · CPC title

• H01M50/209 Primary

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/291 Primary

  characterised by their shape · CPC title

• H01M50/293 Primary

  characterised by the material · CPC title

• H01M50/242 Primary

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title