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US 12,113,389 B2Granted
Control device or control method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKenta Onishi, Yoshiaki Kikuchi, Yoshihiro Uchida, Yuki Sugo
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Abstract
The control device includes an acquisition unit that acquires a first index value that is an index of a deterioration state of the power storage device, and a lower limit setting unit that lowers a lower limit value of an allowable range for a second index value indicating a power storage state of the power storage device, when the first index value acquired by the acquisition unit indicates a predetermined degree of deterioration or more.
Claims10
A control device that controls a power storage device, the control device comprising:
- an acquisition unit that acquires a first index value that is an index of a deterioration state of the power storage device;
- and
- a lower limit setting unit that lowers a lower limit value of an allowable range for a second index value indicating a power storage state of the power storage device, when the first index value acquired by the acquisition unit indicates a predetermined degree of deterioration or more,
- wherein the power storage device has an SOC-OCV characteristic curve including a first SOC region in which SOC is equal to or higher than a predetermined reference value and a second SOC region in which the SOC is less than the reference value,
- wherein the SOC-OCV characteristic curve of the power storage device before deterioration in which the first index value does not indicate the predetermined degree of deterioration or more is different from the SOC-OCV characteristic curve of the power storage device after deterioration in which the first index value indicates the predetermined degree of deterioration or more, and
- wherein an amount of change in OCV of the power storage device before and after deterioration in the first SOC region is greater than the amount of change in the OCV before and after deterioration in the second SOC region.
3 more elements
A control method for controlling a power storage device, the control method comprising:
- acquiring a first index value that is an index of a deterioration state of the power storage device;
- and
- lowering a lower limit value of an allowable range for a second index value indicating a power storage state of the power storage device, when the first index value indicates a predetermined degree of deterioration or more,
- wherein the power storage device has an SOC-OCV characteristic curve including a first SOC region in which SOC is equal to or higher than a predetermined reference value and a second SOC region in which the SOC is less than the reference value,
- wherein the SOC-OCV characteristic curve of the power storage device before deterioration in which the first index value does not indicate the predetermined degree of deterioration or more is different from the SOC-OCV characteristic curve of the power storage device after deterioration in which the first index value indicates the predetermined degree of deterioration or more, and
- wherein an amount of change in OCV of the power storage device before and after deterioration in the first SOC region is greater than the amount of change in the OCV before and after deterioration in the second SOC region.
3 more elements
A control device that controls a power storage device, the control device comprising:
- an acquisition unit that acquires a first index value that is an index of a deterioration state of the power storage device;
- and
- a lower limit setting unit that lowers a lower limit value of an allowable range for a second index value indicating a power storage state of the power storage device, when the first index value acquired by the acquisition unit indicates a predetermined degree of deterioration or more,
- wherein the power storage device has an SOC-OCV characteristic curve including a first SOC region in which SOC is equal to or higher than a predetermined reference value and a second SOC region in which the SOC is less than the reference value, and
- wherein after the power storage device is charged such that the SOC becomes equal to or higher than the reference value and discharge is performed, until a predetermined time elapses from a timing at which discharge is suspended, a voltage of the power storage device does not return to the voltage at a start of discharge.
2 more elements
Dependencies are inferred from the claim text.