US 12,352,821 B2
Calculation system, battery characteristic estimation method, and battery characteristic estimation program
Shinya Nishikawa, Osaka (JP); Tomokazu Sada, Nara (JP); Takashi Iida, Hyogo (JP); and Masaaki Takegata, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/759,913
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Dec. 28, 2020, PCT No. PCT/JP2020/049229
§ 371(c)(1), (2) Date Aug. 1, 2022,
PCT Pub. No. WO2021/166465, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 2020-028220 (JP), filed on Feb. 21, 2020.
Prior Publication US 2023/0065968 A1, Mar. 2, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/374 (2019.01); G01R 31/3828 (2019.01); G01R 31/387 (2019.01); G01R 31/392 (2019.01)
CPC G01R 31/396 (2019.01) [G01R 31/374 (2019.01); G01R 31/3828 (2019.01); G01R 31/387 (2019.01); G01R 31/392 (2019.01)] 13 Claims
OG exemplary drawing
 
1. A calculation system comprising:
a data acquisition unit configured to acquire operation data of a battery while the battery is mounted on a battery system, the operation data including at least voltages and currents measured by a management device at a plurality of time points, and states of charge (SOCs) estimated based on at least one of the voltages and the currents, the management device being configured to manage the battery;
an extraction unit configured to, extract, as sample data, a set of an SOC and a voltage from sets of the SOCs and the voltages the plurality of time points included in the operation data in a period in which the battery is regarded as resting, the period being specified based on the currents; and
an estimation unit configured to estimate an SOC-open circuit voltage (OCV) characteristic of the battery by generating an approximate curve based on the extracted sample data in a state where an actual SOC-OCV characteristics of the battery managed by the management device have not been acquired.