Power storage device

Patent metadata

Field	Value
Publication number	US-2025372803-A1
Application number	US-202519298756-A
Country	US
Kind code	A1
Filing date	Aug 13, 2025
Priority date	Feb 10, 2024
Publication date	Dec 4, 2025
Grant date	—

Abstract

A power storage device includes a plurality of power storage cells, a bottom wall, a panel member that cooperates with the bottom wall to define an emission path, and a protective member. Each power storage cell has a lower surface provided with a safety valve. The bottom wall has a plurality of through holes. The protective member includes a plurality of cylindrical portions projecting through the through holes, respectively, toward the panel member.

First claim

What is claimed is:

1 . A power storage device comprising:
a plurality of power storage cells disposed in one direction; a bottom wall disposed below the plurality of power storage cells; a panel member provided below the bottom wall and cooperating with the bottom wall to define an emission path; and a protective member provided at the bottom wall, the plurality of power storage cells each having a lower surface provided with a safety valve, the bottom wall having a plurality of through holes each provided at a position facing the safety valve, the protective member including a plurality of cylindrical portions projecting through the plurality of through holes, respectively, toward the panel member.

2 . The power storage device according to claim 1 , wherein the protective member further includes a closure portion that closes the cylindrical portion internally.

3 . The power storage device according to claim 1 , wherein each cylindrical portion in a plane orthogonal to a vertical direction has an area in cross section gradually decreasing toward the panel member.

4 . The power storage device according to claim 1 , wherein the protective member includes a coupling portion that couples together the cylindrical portion and another cylindrical portion adjacent thereto in the one direction and paired therewith.

5 . The power storage device according to claim 1 , wherein
the protective member includes a protrusion protruding from an outer surface of the cylindrical portion, and the protrusion is located below the bottom wall and faces the bottom wall.

6 . The power storage device according to claim 1 , further comprising a pillar element disposed between the bottom wall and the panel member, wherein a distance between the pillar element and the bottom wall is smaller than a distance between the panel member and the cylindrical portion.

Assignees

• Toyota Motor Co Ltd

Inventors

• Iwata Makoto
• Ishikawa Shotaro
• Fujiwara Shunsuke
• Nakamura Soichiro
• Nakano Takahiko
• Suzuki Kosuke
• Ishizuka Masahiro
• Matsuo Kensuke
• Kumazawa Kazuya

Classifications

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M50/358

  External gas exhaust passages located on the battery cover or case · CPC title

• H01M50/3425 Primary

  in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member · CPC title

• H01M50/394

  Gas-pervious parts or elements · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title