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Patent Searching and Data


Title:
BATTERY STATE ESTIMATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/065443
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a battery state estimation device that can accurately estimate the deterioration state of the entire battery system considering SOH distribution of battery cells. The battery state estimation device according to the present invention estimates SOH of battery cells using a correspondence relationship between a time derivative of the output voltage and the battery temperature during the rest period of the battery cells, and estimates the deterioration state of the entire battery system using SOH of the plurality of battery cells (refer to fig. 1).

Inventors:
Miftahullatif Emha Bayu (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, JP)
KOUNO Toru (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, JP)
Application Number:
JP2020/034716
Publication Date:
April 08, 2021
Filing Date:
September 14, 2020
Export Citation:
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Assignee:
HITACHI, LTD. (Chiyoda-ku Tokyo, 80, JP)
International Classes:
H01M10/48; H02J7/00; G01R31/374; G01R31/392; G01R31/396
Attorney, Agent or Firm:
HIRAKI & ASSOCIATES (5-1 Atago 2-chome, Minato-k, Tokyo 32, JP)
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