Method for cooling battery

Patent metadata

Field	Value
Publication number	US-2025023134-A1
Application number	US-202418644736-A
Country	US
Kind code	A1
Filing date	Apr 24, 2024
Priority date	Jul 11, 2023
Publication date	Jan 16, 2025
Grant date	—

Abstract

In a laminated all-solid-state battery, a negative electrode terminal and a positive electrode terminal around which a resin sheet is wound are sandwiched between exterior members (laminate films), and the exterior members are joined by heat welding. The laminated all-solid-state battery is in contact with the heat exchanger via a heat conductive sheet. When the terminal temperature detected by the temperature sensor provided at the negative electrode terminal and the positive electrode terminal is equal to or higher than a predetermined value, the flow rate control valve is fully closed and the flow rate control valve is fully opened. The cooling amount of the joint portion in which the negative electrode terminal and the positive electrode terminal extend increases, the temperature of the joint portion decreases, the deformation of the resin sheet is suppressed, and the unsealing of the seal is suppressed.

First claim

What is claimed is:

1 . A method for cooling a battery including
a power generation element including an all-solid-state battery stack, and an exterior member including a laminate film housing the power generation element and having a peripheral edge joined by thermal welding to seal the power generation element, an electrode terminal of the power generation element extending from a joint portion of the exterior member, the method comprising cooling the joint portion from which the electrode terminal extends when a terminal temperature that is a temperature of the joint portion from which the electrode terminal extends is higher than a first predetermined value.

2 . The method according to claim 1 , wherein:
the cooling is liquid cooling in which a heat medium flows through a flow path of a heat exchanger; when the terminal temperature is higher than the first predetermined value, the joint portion is cooled by increasing a heat medium flow rate in the flow path corresponding to the joint portion from which the electrode terminal extends; and when the terminal temperature is lower than a second predetermined value smaller than the first predetermined value, the battery is cooled by the heat medium flowing through an entire flow path of the heat exchanger.

3 . The method according to claim 1 , wherein:
the cooling is air cooling; and when the terminal temperature is higher than the first predetermined value, cooling air is supplied to the joint portion from which the electrode terminal extends.

4 . The method according to claim 1 , wherein:
a thermoplastic resin sheet is disposed between the electrode terminal and the exterior member at the joint portion from which the electrode terminal extends; and the joint portion including the resin sheet is cooled.

5 . The method according to claim 4 , wherein the all-solid-state battery stack is a sulfide-based all-solid-state battery.

Assignees

• Toyota Motor Co Ltd

Inventors

• Migita Tsubasa
• Iida Masahide
• Oguma Yasumasa
• Kuruma Yusuke
• Ukita Keisuke

Classifications

• H01M10/6556

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/178

  for pouch or flexible bag cells · CPC title

• H01M10/647

  Prismatic or flat cells, e.g. pouch 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