To calculate a travelable time in the event of malfunctioning of a current detection unit.SOLUTION: A battery ECU makes a malfunction determination for a current detection unit that detects a current in a secondary battery. In a storage unit of the battery ECU, curves L11 to L14 indicating a correspondence between a voltage of the secondary battery and a time in a case where discharge load on the secondary battery is made constant are stored for each of a plurality of discharge loads of different values. If determining that the secondary battery is malfunctioning, the battery ECU calculates the inclination a of a change in a voltage in relation to a time. The battery ECU compares the inclination of a portion corresponding to the voltage from which the inclination a is calculated with the inclination a thereby selecting from the curves L11 to L14 the one in which the inclination of a portion corresponding to the voltage from which the inclination a is calculated is closest to the inclination a. The battery ECU calculates a travelable time from the one selected from the curves L11 to L14. A drive ECU permits the vehicle to travel within the travelable time.SELECTED DRAWING: Figure 4
【課題】電流検出部の故障時に走行可能時間を算出すること。【解決手段】電池ECUは、二次電池の電流を検出する電流検出部の故障判定を行う。電池ECUの記憶部には、二次電池の放電負荷を一定にした場合の二次電池の電圧と時間との対応関係を示す曲線L11〜L14が、値の異なる複数の放電負荷毎に記憶されている。電池ECUは、二次電池が故障していると判定すると、時間に対する電圧の変化の傾きaを算出する。電池ECUは、算出した傾きaを算出した際の電圧に対応する部分の傾きと、傾きaとを照合することで、傾きaを算出した際の電圧に対応する部分の傾きが傾きaに最も合致する曲線L11〜L14を選択する。電池ECUは、選択した曲線L11〜L14から走行可能時間を算出する。駆動ECUは、走行可能時間内での車両の走行を許容する。【選択図】図4
TRAVEL CONTROL DEVICE AND TRAVELABLE TIME CALCULATION DEVICE
走行制御装置及び走行可能時間算出装置
2020-03-26
Patent
Electronic Resource
Japanese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / 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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