The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2022
Filed:
Mar. 06, 2020
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Ryo Kagami, Ichinomiya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
According to the present disclosure, provided is a battery pack that can prevent the surface pressure applied to a cell group at the time of restraint from being uneven, and can stably demonstrate a high level of battery performance. The battery pack disclosed herein includes a cell group in which a plurality of single cells is arranged, and a restraining member that restrains the cell group. Each of the single cells of this battery pack is an all-solid-state cell including a stacked electrode body in which sheet materials composed of a positive electrode, a negative electrode, and a solid electrolyte layer are stacked, and an outer package body that accommodates the stacked electrode body. The cell group of the battery pack disclosed herein is configured such that the ratio of the maximum value Kof spring constant to the minimum value Kof spring constant along the arrangement direction (K/K) is 1 or more and 3 or less. As a result, the surface pressure applied to the cell group at the time of restraint can be prevented from being uneven, and a high level of battery performance can be exhibited.