Title:
METHOD FOR CHARGING SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/185152
Kind Code:
A1
Abstract:
The present invention provides a power storage system which has high energy density. The present invention provides a power storage system which has high safety. The present invention provides a secondary battery which has high energy density. The present invention provides a secondary battery which has high safety. A battery charger which has a function of controlling the start and stop of charging of a secondary battery and a function of controlling the charging current of a secondary battery. The secondary battery comprises a positive electrode; the positive electrode comprises positive electrode active material particles; and the positive electrode active material particles are formed of lithium cobaltate to which magnesium has been added. The battery charger has a function of controlling charging of a secondary battery with use of a first step in which constant current charging of a secondary battery is started at a time point t1 and a second step in which the charging is stopped at a time point t2. At the time point t2, the crystal structure of lithium cobaltate as determined by powder X-ray diffractometry is represented by the space group R-3m.
Inventors:
TANEMURA KAZUKI (JP)
MIKAMI MAYUMI (JP)
OSADA TAKESHI (JP)
MOMMA YOHEI (JP)
ISHITANI TETSUJI (JP)
KATAGIRI HARUKI (JP)
MIKAMI MAYUMI (JP)
OSADA TAKESHI (JP)
MOMMA YOHEI (JP)
ISHITANI TETSUJI (JP)
KATAGIRI HARUKI (JP)
Application Number:
PCT/IB2022/051616
Publication Date:
September 09, 2022
Filing Date:
February 24, 2022
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
C01G51/00; H01M4/525; H01M10/44; H01M10/48; H02J7/02; H02J7/10
Domestic Patent References:
| WO2020104881A1 | 2020-05-28 | |||
| WO2011036760A1 | 2011-03-31 |
Foreign References:
| JP2005080325A | 2005-03-24 |
Download PDF: