Power storage device

Patent metadata

Field	Value
Publication number	US-2024413504-A1
Application number	US-202318331683-A
Country	US
Kind code	A1
Filing date	Jun 8, 2023
Priority date	Jun 10, 2022
Publication date	Dec 12, 2024
Grant date	—

Abstract

A power storage device includes a pair of restraint plates configured to sandwich and restrain a stacked body, a pair of current collector plates, and a pair of insulating plates in a first direction; and a terminal base configured to be provided on a side surface of at least one of the restraint plates extending in a third direction intersecting both the first direction and a second direction, and the first direction, and have a terminal bolt fixed thereto. The at least one of the restraint plates is configured to have a pair of projecting portions projecting in the second direction beyond the side surface having the terminal base fixed thereto when viewed in the first direction.

First claim

What is claimed is:

1 . A power storage device comprising:
a stacked body configured to have a power storage module in which electrodes including a plurality of bipolar electrodes are stacked in a first direction; a pair of current collector plates configured to be respectively stacked at both ends of the stacked body in the first direction; a pair of insulating plates configured to sandwich the stacked body and the pair of current collector plates in the first direction; a pair of restraint plates configured to sandwich and restrain the stacked body, the pair of current collector plates, and the pair of insulating plates in the first direction; and a terminal base configured to have a terminal bolt electrically connected to a terminal of at least one of the current collector plates and protruding in a second direction intersecting the first direction fixed thereto, and be provided on a first side surface extending in a third direction intersecting both the first direction and the second direction, and the first direction in at least one of the restraint plates, wherein the at least one of the restraint plates is configured to have a pair of projecting portions projecting in the second direction beyond the first side surface having the terminal base fixed thereto when viewed in the first direction, wherein the terminal base is configured to be disposed between the pair of projecting portions when viewed in the first direction, wherein at least one of the insulating plates is configured to include a terminal base protection portion covering at least a part of the terminal base, and wherein the pair of projecting portions are configured to project beyond the terminal base protection portion in the second direction.

2 . The power storage device according to claim 1 ,
wherein the at least one of the insulating plates is configured to have a peripheral wall standing in the first direction, and wherein the peripheral wall is configured to have
a first wall portion standing in a direction lying in the first direction away from the at least one of the restraint plates adjacent thereto in a range having the projecting portions formed therein in the third direction, and
a second wall portion standing in a direction opposite to the first wall portion in the first direction in a range between the pair of projecting portions in the third direction.

3 . The power storage device according to claim 2 ,
wherein the first wall portion is configured to have a first side wall in the third direction when viewed in the first direction, and wherein the pair of projecting portions are configured to project beyond the first side wall in the second direction.

4 . The power storage device according to claim 3 ,
wherein the second wall portion is configured to have a second side wall covering the first side surface in the third direction when viewed in the first direction, and wherein the first side wall is configured to project beyond the second side wall in the second direction.

5 . The power storage device according to claim 4 ,
wherein the second wall portion is configured to have a third side wall in the second direction when viewed in the first direction such that a second side surface in the second direction of the projecting portions is covered, and wherein the second side wall and the third side wall are configured to be connected to each other and cover the first side surface and the second side surface of the at least one of the restraint plates.

Assignees

• Toyota Jidoshokki Kk
• Toyota Motor Co Ltd

Inventors

• Oide Ryuji
• Maeda Kazuki
• Morioka Satoshi
• Okumura Motoyoshi

Classifications

• H01M2220/20

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• H01M50/553

  Terminals adapted for prismatic, pouch or rectangular cells · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0468

  Compression means for stacks of electrodes and separators · CPC title