US 12,424,673 B2
Battery control apparatus and battery system
Keiichiro Ohkawa, Hitachinaka (JP); and Ryohhei Nakao, Tokyo (JP)
Assigned to VEHICLE ENERGY JAPAN INC., Hitachinaka (JP)
Appl. No. 17/789,494
Filed by VEHICLE ENERGY JAPAN INC., Hitachinaka (JP)
PCT Filed Sep. 18, 2020, PCT No. PCT/JP2020/035632
§ 371(c)(1), (2) Date Jun. 27, 2022,
PCT Pub. No. WO2021/131184, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 2019-237407 (JP), filed on Dec. 26, 2019.
Prior Publication US 2023/0039183 A1, Feb. 9, 2023
Int. Cl. G01R 31/389 (2019.01); G01R 31/374 (2019.01); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); H01M 10/42 (2006.01); H01M 10/48 (2006.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); B60L 50/60 (2019.01); B60L 58/12 (2019.01); B60L 58/18 (2019.01)
CPC H01M 10/4257 (2013.01) [G01R 31/374 (2019.01); G01R 31/3842 (2019.01); G01R 31/389 (2019.01); G01R 31/392 (2019.01); H01M 10/482 (2013.01); H01M 10/486 (2013.01); H01M 50/204 (2021.01); H01M 50/249 (2021.01); B60L 50/60 (2019.02); B60L 58/12 (2019.02); B60L 58/18 (2019.02); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A battery control apparatus comprising:
a first operation unit that computes a first state of charge of a battery according to a first technique on a basis of an electric current value, a voltage value, and an internal resistance value of the battery;
a second operation unit that computes a second state of charge of the battery according to a second technique different from the first technique;
an internal resistance operation execution judgment unit that judges that an internal resistance correction operation can be executed if a difference between the first state of charge and the second state of charge is equal to or more than a specified value;
an internal resistance correction amount operation unit that computes a resistance correction amount according to an absolute value of the difference between the first state of charge and the second state of charge and an absolute value of the electric current value; and
an internal resistance correction unit that corrects the internal resistance value with the computed resistance correction amount if it is judged that the internal resistance correction operation can be executed,
wherein the resistance correction amount becomes a larger value when the difference is larger and an absolute value of the electric current value is smaller.