VEHICLE

To diagnose a failure in a relay by using the minimum number of voltage sensors.SOLUTION: Under a condition where an AC voltage from a charger 2 is being applied to an inlet 60, an ECU 100 controls a relay 50 such that a connection destination of a bidirectional converter 20 is switched to an outlet...

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Bibliographic Details
Main Author ANDO TORU
Format Patent
LanguageEnglish
Japanese
Published 04.07.2022
Subjects
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES
ELECTRICITY
ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES
PERFORMING OPERATIONS
SYSTEMS FOR STORING ELECTRIC ENERGY
TRANSPORTING
VEHICLES IN GENERAL
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Summary:To diagnose a failure in a relay by using the minimum number of voltage sensors.SOLUTION: Under a condition where an AC voltage from a charger 2 is being applied to an inlet 60, an ECU 100 controls a relay 50 such that a connection destination of a bidirectional converter 20 is switched to an outlet 70 when an AC voltage is detected by a voltage sensor 40 while the relay 50 is controlled to electrically connect the bidirectional converter 20 and the inlet 60. The ECU 100 diagnoses the relay 50 as having a failure (e.g. welding) to be not switchable by the inlet 60 side when an AC voltage is detected by the voltage sensor 40. On the other hand, when an AC voltage is not detected by the voltage sensor 40, the ECU 100 controls the relay 50 to restore the connection destination of the bidirectional converter 20 to the inlet 60, and, when an AC voltage is not detected by the voltage sensor 40, the ECU 100 diagnoses the relay 50 as having a failure to be not switchable by the outlet 70 side.SELECTED DRAWING: Figure 2 【課題】できるだけ少ない電圧センサでリレーの故障を診断する。【解決手段】充電器２からの交流電圧がインレット６０に印加されている条件下において、ＥＣＵ１００は、双方向コンバータ２０とインレット６０とが電気的に接続されるようにリレー５０を制御した状態で電圧センサ４０により交流電圧が検出された場合に、双方向コンバータ２０の接続先がアウトレット６０に切り替わるようにリレー５０を制御する。ＥＣＵ１００は、電圧センサ４０により交流電圧が検出されたときには、リレー５０がインレット６０側で切り替え不能に故障（溶着など）していると診断する。一方で、ＥＣＵ１００は、電圧センサ４０により交流電圧が検出されなかったときには、双方向コンバータ２０の接続先がインレット６０に戻るようにリレー５０を制御し、電圧センサ４０により交流電圧が検出されなかったときには、リレー５０がアウトレット７０側で切り替え不能に故障していると診断する。【選択図】図２
Bibliography:Application Number: JP20200211969