A relay diagnosis apparatus according to the present disclosure is for a parallel pack assembly including a first battery pack having a first battery module and a first positive relay and a second battery pack having a second battery module and a second positive relay, and includes a diagnosis unit including a diagnosis switch and a diagnosis resistor connected between a first pack terminal and a second pack terminal, a first detector to detect a current of the first battery module, a second detector to detect a current of the second battery module, and a control unit to collect a first detection value from the first detector and a second detection value from the second detector in a first diagnosis period during which the first and second positive relays are in an open operational state and the diagnosis switch is in a closed operational state. The control unit determines a stuck-closed fault of the first positive relay and a stuck-closed fault of the second positive relay based on the first detection value, the second detection value and a first threshold.
RELAY DIAGNOSIS DEVICE, RELAY DIAGNOSIS METHOD, BATTERY SYSTEM, AND ELECTRIC VEHICLE
RELAISDIAGNOSEVORRICHTUNG, RELAISDIAGNOSEVERFAHREN, BATTERIESYSTEM UND ELEKTRISCHES FAHRZEUG
DISPOSITIF DE DIAGNOSTIC DE RELAIS, PROCÉDÉ DE DIAGNOSTIC DE RELAIS, SYSTÈME DE BATTERIE ET VÉHICULE ÉLECTRIQUE
2023-07-19
Patent
Elektronische Ressource
Englisch
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