公开(公告)号：US20230148028A1

公开(公告)日：2023-05-11

申请号：US17894715

申请日：2022-08-24

申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA ,  JINNAI INDUSTRIES INC.

发明人： Tomohiro Sekiya ,  Kensaku Miyazawa ,  Kazuo Tojima ,  Hitoshi Nakamura ,  Haruyoshi Sakakibara ,  Yasutaka Terashima

IPC分类号： G01R31/52 ,  G01R31/385

CPC分类号： G01R31/52 ,  G01R31/3865

摘要： A method for evaluating an electric power storage device includes causing a short circuit by inserting an electrically conductive probe into a stacked portion in a thickness direction of electrode layers; measuring a penetration depth of the probe after the short circuit occurs; and evaluating the number of electrode layers involved in the short circuit based on the penetration depth. The penetration depth is identified by measuring a length of an adhesion portion in an axial direction of the probe. The adhesion portion is a portion of a surface of the probe to which a constituent material of the stacked portion adheres.