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US 2020/0264237 A1Published application
Apparatus and method for calculating soh of battery pack
AssigneeLG Chem, Ltd.
InventorHyun Chul LEE
Life of this patent
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Abstract
A method for calculating an accurate SOH of a battery pack by reducing an error occurring during SOH calculation of the battery pack.
Claims10
A method for calculating a state of health (SOH) of a battery pack, the method comprising:
- a current integrated value calculation step corresponding to an SOC change amount of calculating a current integrated value corresponding to the SOC change amount using a current integration method;
- an SOH update signal checking step of checking whether an SOH update signal is applied and a condition of the SOH update signal;
- a final current integrated value calculation step of calculating a final current integrated value based on the current integrated value corresponding to the SOC change amount when the SOH update signal satisfies a predetermined condition in the SOH update signal checking step;
- a battery pack nominal capacity setting step of setting a nominal capacity of the battery pack to the final current integrated value calculated in the final current integrated value calculation step when the final current integrated value calculation step is performed;
- and
- a battery pack SOH calculation step of calculating the SOH of the battery pack based on the nominal capacity of the battery pack set in the battery pack nominal capacity setting step.
3 more elements
A device for calculating an SOH of a battery pack, the device comprising:
- an SOC calculation unit for calculating an SOC of the battery at predetermined period intervals;
- an SOH calculation unit for calculating an SOH based on the SOC measured by the SOC calculation unit,
- wherein the SOC calculation unit comprises a current integrated value calculation module for calculating a current integrated value corresponding to an SOC change amount of the battery, and
- wherein the SOH calculation unit comprises:
- an SOH update signal checking module for checking whether or not the SOH update signal is applied;
- a final current integrated value calculation module for calculating a final current integrated value based on the current integrated value corresponding to the SOC change amount calculated by the current integrated value calculation module;
- a battery pack nominal capacity setting module for setting the nominal capacity of the battery pack;
- and
- an SOH calculation module for calculating the SOH of the battery pack.
6 more elements
Dependencies are inferred from the claim text.