Battery module

Patent metadata

Field	Value
Publication number	US-10950832-B2
Application number	US-201816217233-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Dec 25, 2017
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

[Object] To provide a battery module that can prevent the breakage of batteries due to the expansion or contraction of the batteries when charging and discharging the batteries.
[Solution To Problem] A battery module includes a plurality of stacked batteries and a restraint part for restraining the plurality of batteries. The restraint part is composed of a pair of end plates arranged at either end in the stacking direction of the plurality of batteries and tension bands for connecting the pair of end plates and constraining the plurality of batteries in a pressurized state. The tension bands include elastically deformable concave-convex parts.

First claim

The invention claimed is:

1. A battery module, comprising a plurality of stacked batteries, a restraint part for restraining the plurality of batteries, and an intermediate plate between the plurality of batteries,
wherein the restraint part is comprised of a pair of end plates arranged at either end in the stacking direction of the plurality of batteries and a tension band for connecting the pair of end plates and constraining the plurality of batteries in a pressurized state, and
wherein the tension band includes an elastically deformable concave-convex part, and
wherein the concave-convex part is disposed only on a portion facing at least one side surface of the end plates and the intermediate plate.

2. The battery module according to claim 1 , wherein the concave-convex part is disposed only on a portion facing at least one side surface of the end plates and the intermediate plate.

3. The battery module according to claim 1 , wherein the tension band is composed of a metal or a fiber-reinforced plastic.

4. The battery module according to claim 1 , wherein the concave-convex part is formed by an embossing process.

5. The battery module according to claim 1 , wherein the plurality of batteries are all-solid-state batteries.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kawakami Masatsugu
• Okada Hidetoshi
• Oguma Yasumasa

Classifications

• H01M10/0481 Primary

  Compression means other than compression means for stacks of electrodes and separators · CPC title

• H01M50/291

  characterised by their shape · CPC title

• H01M50/209 Primary

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

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M2220/20

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