公开(公告)号：US11899070B2

公开(公告)日：2024-02-13

申请号：US17288789

申请日：2019-10-09

申请人： Vehicle Energy Japan Inc.

发明人： Ryohhei Nakao ,  Hiroshi Morikawa ,  Masashi Naitoh ,  Masafumi Shiwa ,  Fanny Matthey

IPC分类号： G01R31/382 ,  G01R31/367 ,  G01R31/374 ,  B60L58/10 ,  G01R31/36 ,  H01M10/44 ,  H01M10/48 ,  H02J7/00

CPC分类号： G01R31/382 ,  B60L58/10 ,  G01R31/367 ,  G01R31/3648 ,  G01R31/374 ,  H01M10/44 ,  H01M10/48 ,  H01M10/486 ,  H02J7/0047 ,  B60L2240/545 ,  B60L2240/547 ,  B60L2240/549

摘要： An appropriate upper limit current value is set in consideration of steep change in battery voltage in a high-current region caused by the ion concentration gradient in a diffusion layer formed around an interface between an electrode and an electrolyte. An upper limit current calculator 152 includes: a concentration gradient estimator 1523 that estimates a lithium ion concentration gradient in a diffusion layer formed around an interface between an electrode and an electrolyte of a battery, based on a current flowing in the battery, or on the current and a temperature; and an upper limit current determiner 1524 that determines an upper limit current value of the battery, based on the lithium ion concentration gradient. The upper limit current determiner 1524 determines the upper limit current value such that an overvoltage of the battery according to the lithium ion concentration gradient falls within a predetermined range.