To appropriately diagnose the presence or absence of welding of charging relays even if a DC power supply facility is a specific DC power supply facility.SOLUTION: When DC charging is completed, an ECU of a vehicle performs first diagnosis processing for diagnosing the presence or absence of welding of charging relays 71 and 72 while SMRs are closed. In the first diagnosis processing, the presence or absence of welding of the charging relays 71 and 72 is diagnosed on the basis of an opening/closing command to the charging relays 71 and 72, and a voltage applied to a charging port. When it is determined that both of the charging relays 71 and 72 are welded in the first diagnosis processing, the ECU performs second diagnosis processing on the assumption that a DC power supply facility is a specific DC power supply facility. In the second diagnosis processing, the presence or absence of welding of the charging relays 71 and 72 is diagnosed on the basis of the opening/closing command to the charging relays 71 and 72, the voltage (a first voltage) applied to the charging port, and a voltage (a second voltage) between a first power line and a second power line.SELECTED DRAWING: Figure 2
【課題】DC給電設備が特定DC給電設備であっても、充電リレーの溶着の有無を適切に診断することである。【解決手段】車両のECUは、DC充電が完了すると、SMRを閉成した状態で充電リレー71,72の溶着の有無を診断する第1診断処理を実行する。第1診断処理は、充電リレー71,72への開放/閉成の指令と、充電口に印加されている電圧とに基づいて充電リレー71,72の溶着の有無が診断される。第1診断処理において、充電リレー71,72の両方が溶着していると判定された場合には、ECUは、DC給電設備が特定DC給電設備であることを想定した第2診断処理を実行する。第2診断処理は、充電リレー71,72への開放/閉成の指令と、充電口に印加されている電圧(第1電圧)と、第1電力線および第2電力線間の電圧(第2電圧)とに基づいて充電リレー71,72の溶着の有無が診断される。【選択図】図2
VEHICLE AND WELDING DIAGNOSIS METHOD
車両および溶着診断方法
20.08.2020
Patent
Elektronische Ressource
Japanisch
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