US 11,899,070 B2
Battery control device
Ryohhei Nakao, Tokyo (JP); Hiroshi Morikawa, Hitachinaka (JP); Masashi Naitoh, Hitachinaka (JP); Masafumi Shiwa, Hitachinaka (JP); and Fanny Matthey, Tokyo (JP)
Assigned to VEHICLE ENERGY JAPAN INC., Hitachinaka (JP)
Appl. No. 17/288,789
Filed by Vehicle Energy Japan Inc., Hitachinaka (JP)
PCT Filed Oct. 9, 2019, PCT No. PCT/JP2019/039875
§ 371(c)(1), (2) Date Apr. 26, 2021,
PCT Pub. No. WO2020/085097, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 2018-201526 (JP), filed on Oct. 26, 2018.
Prior Publication US 2022/0003819 A1, Jan. 6, 2022
Int. Cl. G01R 31/382 (2019.01); G01R 31/367 (2019.01); G01R 31/374 (2019.01); B60L 58/10 (2019.01); G01R 31/36 (2020.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01)
CPC G01R 31/382 (2019.01) [B60L 58/10 (2019.02); G01R 31/367 (2019.01); G01R 31/3648 (2013.01); G01R 31/374 (2019.01); H01M 10/44 (2013.01); H01M 10/48 (2013.01); H01M 10/486 (2013.01); H02J 7/0047 (2013.01); B60L 2240/545 (2013.01); B60L 2240/547 (2013.01); B60L 2240/549 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A battery control apparatus, comprising:
a first circuit structured to acquire data indicative of a current flowing in a secondary battery from a current detector;
a concentration gradient estimator that estimates an ion concentration gradient in a diffusion layer formed around an interface between an electrode and an electrolyte of the secondary battery, based on the current flowing in the secondary battery, or on the current and a temperature of the secondary battery; and
an upper limit current determiner that determines an upper limit current value of the secondary battery, based on the ion concentration gradient,
wherein the upper limit current determiner determines the upper limit current value such that an overvoltage of the secondary battery according to the ion concentration gradient falls within a predetermined range; and
a second circuit structured to provide an instruction to limit at least one of charging or discharging the secondary battery based on the upper limit current value.