Prismatic power storage device

Patent metadata

Field	Value
Publication number	US-2025379321-A1
Application number	US-202519016624-A
Country	US
Kind code	A1
Filing date	Jan 10, 2025
Priority date	Jun 10, 2024
Publication date	Dec 11, 2025
Grant date	—

Abstract

A prismatic power storage device includes a case having a case body and a rectangular plate-shaped lid, an electrode body housed in the case, a positive terminal member extending out through a positive-electrode insert hole provided in the lid, and a negative terminal member extending out through a negative-electrode insert hole. The lid includes a first safety valve provided in a center of the lid and to be opened at a first operating pressure, a second safety valve provided on one side relative to a central region and to be operated at a second operating pressure higher than the first operating pressure, and a third safety valve provided on the other side relative to the central region and to be operated at a third operating pressure higher than the first operating pressure.

First claim

What is claimed is:

1 . A prismatic power storage device comprising:
a case having a rectangular parallelepiped box shape, including:
a case body made of metal in a bottomed rectangular tube shape with a rectangular opening portion; and
a lid made of metal in a rectangular plate shape and closing the rectangular opening portion;
an electrode body housed in the case hermetically sealed, the electrode body including a positive current collector part and a negative current collector part; a positive terminal member having one end connected to the positive current collector part, and extending out of the case by passing through a positive-electrode insert hole provided in the lid on one side in a longitudinal direction of the lid; and a negative terminal member having one end connected to the negative current collector part, and extending out of the case by passing through a negative-electrode insert hole provided in the lid on another side in the longitudinal direction, wherein the lid includes: a first safety valve provided in a central region in the longitudinal direction, between the positive-electrode insert hole and the negative-electrode insert hole, the first safety valve being to be opened at a first operating pressure; a second safety valve provided on the one side in the longitudinal direction relative to the central region, the second safety valve being to be opened at a second operating pressure higher than the first operating pressure; and a third safety valve provided on the other side in the longitudinal direction relative to the central region, the third safety valve being to be opened at a third operating pressure higher than the first operating pressure.

2 . The prismatic power storage device according to claim 1 , wherein the second safety valve is provided on the one side in the longitudinal direction relative to the positive-electrode insert hole.

3 . The prismatic power storage device according to claim 1 , wherein the third safety valve provided to the other side in the longitudinal direction relative to the negative-electrode insert hole.

4 . The prismatic power storage device according to claim 2 , wherein the third safety valve provided to the other side in the longitudinal direction relative to the negative-electrode insert hole.

Assignees

• Prime Planet Energy & Solutions Inc

Inventors

• Fujimura Satoshi

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2200/20

  Pressure-sensitive devices · CPC title

• H01M50/15

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• H01M50/159

  Metals · CPC title

• H01M50/103 Primary

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title