To diagnose whether a battery undergoes rapid deterioration when large electric current is applied to the battery due to counter-electromotive force.SOLUTION: When a PCU (inverter) of an electric vehicle fails, whether a battery undergoes rapid deterioration is determined using a first map with a battery temperature TB and electric current IB as parameters or a second map with the temperature TB and a change rate ΔVB of battery voltage VB as parameters (S12 and S13). When the battery is determined to undergo the rapid deterioration, a battery replacement warning lamp is illuminated (S14).SELECTED DRAWING: Figure 5
【課題】逆起電力による大電流がバッテリに印加されたとき、バッテリが急速劣化したか否かを診断する。【解決手段】電動車両のPCU(インバータ)が故障したとき、バッテリの温度TBと電流IBとをパラメータとした第1マップ、または、温度TBとバッテリの電圧VBの変化速度ΔVBとをパラメータとした第2マップを用いて、バッテリの急速劣化が生じたか否かを判定する(S12mS13)。バッテリの急速劣化が生じたと判定したとき、バッテリ交換警告灯を点灯する(S14)。【選択図】図5
ELECTRIC VEHICLE AND VEHICLE BATTERY DETERIORATION DIAGNOSTIC METHOD
電動車両、および、車両用バッテリの劣化診断方法
2024-04-05
Patent
Electronic Resource
Japanese
IPC: | 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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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