US 12,261,271 B2
Management device and power storage system
Yusuke Itakura, Nara (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/633,361
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jul. 21, 2020, PCT No. PCT/JP2020/028182
§ 371(c)(1), (2) Date Feb. 7, 2022,
PCT Pub. No. WO2021/033480, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 2019-152148 (JP), filed on Aug. 22, 2019.
Prior Publication US 2022/0294028 A1, Sep. 15, 2022
Int. Cl. H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 50/583 (2021.01)
CPC H01M 10/425 (2013.01) [H01M 10/48 (2013.01); H01M 50/583 (2021.01); H01M 2010/4271 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A management device managing a power storage module including a plurality of cell blocks connected in series, each cell block of the plurality of cell blocks includes a plurality of cells connected in parallel, the management device comprising:
a voltage detector that detects a voltage of each of the plurality of cell blocks; and
a controller that performs, for each of the plurality of cell blocks:
calculating a change value of a voltage for each of the plurality of cell blocks for a certain period of time each being the voltage detected by the voltage detector;
integrating absolute values of change values to obtain an integration value, the change values each being the change value calculated; and
determining, based on the integration value, whether or not any cell block of the plurality of cell blocks includes a separated cell that is electrically separated among the plurality of cells.