In the present invention, the connection between an external power supply and a unit for detecting welding of a relay is disestablished at least when a short circuit is detected, thereby preventing the short circuit from being falsely detected in the event that the short circuit and the welding of the relay can both be detected. A device (100) for detecting welding of a relay detects welding of a relay provided to a path via which a cell (152) is charged by an external power supply (160). Welding of a power-supply-side relay (101) or a ground-side relay (102) is detected on the basis of a current flowing disproportionately more toward the external power supply (160) than the power-supply-side relay (101) or ground-side relay (102) when a control unit (106) has deactivated the power-supply-side relay (101) or ground-side relay (102) during an interrupting in charging. A disconnecting switch (104) establishes or disestablishes the connection between the external power supply (160) and a weld-detection switch (103).
Device for detecting welding of relay
2015-05-06
Patent
Elektronische Ressource
Englisch
IPC: | H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01H Elektrische Schalter , ELECTRIC SWITCHES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |