The present invention relates to a battery system and a capacity recovery method for a lithium ion secondary battery. An electronic control unit (ECU) executes capacity recovery control for recovering the capacity of an assembled battery (10) by controlling a power control unit (PCU) (920), wherein the capacity recovery control comprises a discharge mode and a capacity recovery mode. In the discharge mode, the ECU (960) discharges the assembled battery (10) to a predetermined overdischarge region, and in the capacity recovery mode, the ECU (960), in the overdischarge region, increases the voltage of the lithium ion secondary battery due to the discharge stop and repeatedly executes the pulse discharge for discharging the lithium ion secondary battery while vibrating the discharge current.
ECU(960)는, PCU(920)를 제어함으로써, 조전지(10)의 용량을 회복시키는 용량 회복 제어를 실행한다. 용량 회복 제어는, 방전 모드와, 용량 회복 모드를 포함한다. 방전 모드에서는, ECU(960)는, 조전지(10)를 소정의 과방전 영역까지 방전시킨다. 용량 회복 모드에서는, ECU(960)는, 과방전 영역에 있어서, 방전 정지에 의한 리튬 이온 이차 전지의 전압 상승과, 방전 전류를 진동시키면서 리튬 이온 이차 전지를 방전시키는 펄스 방전을 반복하여 실행한다.
BATTERY SYSTEM AND CAPACITY RECOVERY METHOD FOR LITHIUM ION SECONDARY BATTERY
전지 시스템 및 리튬 이온 이차 전지의 용량 회복 방법
2019-06-24
Patent
Electronic Resource
Korean
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY |
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