Suche in nationalen und internationalen Patentsammlungen

1. (WO2018055915) SECONDARY BATTERY CONTROL DEVICE

Pub. No.:    WO/2018/055915    International Application No.:    PCT/JP2017/027609
Publication Date: Fri Mar 30 01:59:59 CEST 2018 International Filing Date: Tue Aug 01 01:59:59 CEST 2017
IPC: H02J 7/00
G01R 31/36
H01M 10/44
H01M 10/48
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: ODA Masanari
織田 将成
SUZUKI Shuichi
鈴木 修一
MAKINO Shigeki
牧野 茂樹
ISHIZU Takenori
石津 竹規
NAKAO Ryohhei
中尾 亮平
Title: SECONDARY BATTERY CONTROL DEVICE
Abstract:
Extending the service life of secondary batteries has not been possible due to the deterioration of the secondary batteries. According to the present invention, in step S17, it is determined whether the difference between the average value of a negative electrode capacity deviation dn1 calculated in step 15 and a negative electrode capacity deviation dn2 calculated in step 16 is greater than a predetermined value D. When the average value of the actually measured negative electrode capacity deviation dn1 is greater than the ideal negative electrode capacity deviation dn2, and the deterioration of the negative electrode capacity deviation dn1 is in progress, a secondary battery 10 is controlled to operate at a high voltage in the following step S18. Accordingly, the deterioration of the negative electrode capacity deviation dn1 is suppressed, and the service life of the secondary battery 10 is extended. In addition, when the average value of an actually measured positive electrode utilization rate mp1 decreases below the ideal positive electrode utilization rate mp2, and the deterioration of the positive electrode utilization rate mp1 is in progress, the secondary battery 10 is controlled in step S20 to operate at a reduced upper limit current of the secondary battery 10. Thus, the deterioration of the positive electrode utilization rate mp1 is suppressed, and the service life of the secondary battery 10 is extended.