Title:
BATTERY SYSTEM
Document Type and Number:
Japanese Patent JP2021141656
Kind Code:
A
Abstract:
To accurately calculate the charge reserve amount of a negative electrode while suppressing the calculation amount in a cell system equipped with a nickel-metal hydride battery.SOLUTION: An ECU 100 executes a process of calculating the discharge reserve amount, and a process of calculating the charge reserve amount by subtracting the positive electrode capacity and the discharge reserve amount from the negative electrode capacity. The process of calculating the discharge reserve amount includes a process of calculating the discharge reserve increase amount using a model. The model includes a model indicating the amount of increase for each battery temperature by multiplying the square root of an elapsed time by a coefficient for each battery temperature. Then, the process of calculating the discharge reserve increase amount includes a process of calculating a value calculated this time by adding the previously calculated value to a value obtained by dividing the squared value of the above coefficient according to the battery temperature by the value obtained by doubling the previously calculated value.SELECTED DRAWING: Figure 10
Inventors:
MATSUMOTO JUNICHI
TAGAMI AKITSUGU
SASAKI RYO
TAGAMI AKITSUGU
SASAKI RYO
Application Number:
JP2020035594A
Publication Date:
September 16, 2021
Filing Date:
March 03, 2020
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
H02J7/00; G01R31/367; G01R31/374; G01R31/378; G01R31/392; H01M10/48; H02J7/04; H02J7/10
Attorney, Agent or Firm:
Fukami patent office