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1. (WO2014208253) SECONDARY BATTERY SYSTEM

Pub. No.:    WO/2014/208253    International Application No.:    PCT/JP2014/064046
Publication Date: Thu Jan 01 00:59:59 CET 2015 International Filing Date: Thu May 29 01:59:59 CEST 2014
IPC: H02J 7/00
B60L 3/00
B60L 11/18
H01M 10/44
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: SASAKI Hironori
佐々木 寛文
Title: SECONDARY BATTERY SYSTEM
Abstract:
The purpose of the invention is to provide a secondary battery system capable of suppressing the degradation of battery capacity. When it is discriminated that an assembled battery (41) is brought into a non-use state, a battery state detection unit (523) in a battery controller (52) compares the SOC of the assembled battery (41), which is calculated by a battery state calculation unit (522), with a reference SOC (S003). If the SOC of the assembled battery (41) is higher than the reference SOC, the battery state detection unit (523) in the battery controller (52) calculates, from the difference between the SOC of the assembled battery (41) and the reference SOC, a capacity value that makes the SOC of the assembled battery (41) less than the reference SOC and transmits calculated capacity value to a cell controller (51) (S004). Based on the capacity value transmitted from the battery state detection unit (523), the cell controller (51) discharges the assembled battery (41) (S005).