公开(公告)号：US20210152010A1

公开(公告)日：2021-05-20

申请号：US17097244

申请日：2020-11-13

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroki NAGAI ,  Hiroki TASHIRO ,  Mitsuhiro KUZUBA ,  Ryo KANADA

IPC: H02J7/00 ,  H01M10/0525 ,  H01M10/44 ,  G01R31/3842 ,  G01R31/396 ,  B60L58/12 ,  B60L53/62

Abstract: In a method for charging a battery, the battery is a lithium ion battery including a graphite-containing negative electrode. A stage structure of the graphite is classified into a stage 1 to a stage 4 . The battery includes: an SOC region where the stage 4 and the stage 3 coexist; an SOC region where the stage 3 and the stage 2 coexist; and an SOC region where the stage 2 and the stage 1 coexist. The method includes first and second steps. The first step is estimating an SOC of the battery based on at least one of a voltage and a current of the battery. The second step is determining a charging current to the battery in accordance with the SOC of the battery such that the charging current in the SOC region is larger than the charging current in the SOC regions.