Method for producing battery module and battery module

Patent metadata

Field	Value
Publication number	US-2024243407-A1
Application number	US-202418404612-A
Country	US
Kind code	A1
Filing date	Jan 4, 2024
Priority date	Jan 16, 2023
Publication date	Jul 18, 2024
Grant date	—

Abstract

A main object of the present disclosure is to provide a method for producing a method for producing a battery module wherein batteries are well joined. The present disclosure achieves the object by providing the method including: a preparing step of preparing a plurality of battery; a layered body forming step of forming a layered body by arranging an intermediate member between a pair of the battery adjacent to each other in a thickness direction; and a joining step of joining the pair of the battery in the layered body using an adhesive agent, wherein the intermediate member includes a frame structure when viewed from the thickness direction; the intermediate member includes a communicating part that communicates an inside and an outside of the frame structure; and the joining step includes an injecting treatment of injecting the adhesive agent into the inside of the frame structure via the communicating part.

First claim

What is claimed is:

1 . A method for producing a battery module, the method comprising:
a preparing step of preparing a plurality of battery; a layered body forming step of forming a layered body by arranging an intermediate member between a pair of the battery adjacent to each other in a thickness direction; and a joining step of joining the pair of the battery in the layered body using an adhesive agent, wherein the intermediate member includes a frame structure when viewed from the thickness direction; the intermediate member includes a communicating part that communicates an inside and an outside of the frame structure; and the joining step includes an injecting treatment of injecting the adhesive agent into the inside of the frame structure via the communicating part.

2 . The method for producing a battery module according to claim 1 , wherein
the joining step includes a degassing treatment of degassing the inside via the communicating part before the injecting treatment; and when V 1 designates a volume of a gas degassed by the degassing treatment and V 2 designates a volume of the adhesive agent to be injected by the injecting treatment, the V 1 and the V 2 satisfy V 2 ≤V 1 .

3 . The method for producing a battery module according to claim 1 , wherein
the adhesive agent contains a thermosetting resin; the joining step includes a curing treatment of curing the adhesive agent after the injecting treatment; and the curing treatment is a treatment of curing the adhesive agent by a heat generated by charging or discharging of the battery.

4 . The method for producing a battery module according to claim 1 , wherein the pair of the battery in the layered body are electronically connected to each other interposing the intermediate member.

5 . The method for producing a battery module according to claim 1 , wherein the battery includes a plurality of electrode layered in the thickness direction, and includes a bipolar electrode as the electrode.

6 . The method for producing a battery module according to claim 1 , wherein
a shape of the battery in a plan view when viewed from the thickness direction is a square; and a length of each side configuring the square is 30 cm or more.

7 . The method for producing a battery module according to claim 1 , wherein the battery includes a plurality of electrode layered in the thickness direction, and a laminate-type outer package that seals the plurality of electrode.

8 . A battery module comprising:
a plurality of battery arranged in a thickness direction; and an intermediate member arranged between a pair of the battery adjacent to each other in the thickness direction, wherein the intermediate member includes a frame structure when viewed from the thickness direction; the intermediate member includes a communicating part that communicates an inside and an outside of the frame structure; and the battery module includes an adhesive agent layer that joins the pair of the battery, in the inside.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ishikawa Shotaro
• Yamada Atsushi

Classifications

• H01M50/209

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

• H01M50/258

  Modular batteries; Casings provided with means for assembling · CPC title

• H01M50/244 Primary

  Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method · CPC title

• H01M50/293

  characterised by the material · CPC title

• H01M50/264 Primary

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