Battery pack

Patent metadata

Field	Value
Publication number	US-2024356134-A1
Application number	US-202418433583-A
Country	US
Kind code	A1
Filing date	Feb 6, 2024
Priority date	Apr 18, 2023
Publication date	Oct 24, 2024
Grant date	—

Abstract

The control device executes a process including a step of acquiring a detected value from each surface pressure sensor when charging is in progress, a step of specifying a corresponding partial pressurizing unit when it is determined that there is a reaction uneven portion, a step of outputting a pressurization command, a step of determining whether or not pressurization is completed, and a step of outputting a pressurization release command when it is determined that pressurization is completed.

First claim

What is claimed is:

1 . A battery pack comprising:
a first all-solid-state battery; a second all-solid-state battery; a surface pressure sensor provided between the first all-solid-state battery and the second all-solid-state battery in a bound state and configured to detect a distribution of an in-plane pressure between the first all-solid-state battery and the second all-solid-state battery; and a control device configured to detect, by using a detection result from the surface pressure sensor, a portion where a local pressure increase occurs between the first all-solid-state battery and the second all-solid-state battery as a portion where reaction unevenness occurs.

2 . The battery pack according to claim 1 , wherein the first all-solid-state battery and the second all-solid-state battery have a characteristic that a thickness in an arrangement direction of the first all-solid-state battery and the second all-solid-state battery increases compared with a thickness in an initial state due to the reaction unevenness that occurs during charging or discharging of the battery pack.

3 . The battery pack according to claim 1 , wherein the surface pressure sensor is configured to detect the distribution of the in-plane pressure between the first all-solid-state battery and the second all-solid-state battery on an end side close to a first terminal of the first all-solid-state battery and a second terminal of the second all-solid-state battery in a plane.

Assignees

• Toyota Motor Co Ltd

Inventors

• Otaki Mitsutoshi
• Nakanishi Shinji
• Waseda Tetsuya
• Yoshida Jun
• Migita Tsubasa
• Uchida Yoshihiro

Classifications

• G01R31/36

  Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] · CPC title

• G01L5/00

  Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• H01M10/482 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M10/0562

  Solid materials · CPC title