The invention provides a vehicle relay diagnostic device which suppresses the complicated diagnosis of the malfunction of a plurality of relays. A vehicle relay diagnostic device includes: a first detection unit that detects a voltage of a converter; a second detection unit that detects a voltage that is a potential difference between a first electric wire between the first relay and the converter and a second electric wire between the second relay and the power storage unit; a third detection unit that detects a voltage between terminals of the first relay; and a control system. The processing performed by the control system includes: a step of matching the voltage of the power storage unit with the voltage of the converter; a step of diagnosing that the first relay is in a disconnection clamping stagnation abnormity; outputting a closing signal to the second relay; a step of diagnosing that the second relay is in a disconnection clamping stagnation abnormity; a step of diagnosing that the second relay is in a closed clamping stagnation abnormity; and a step of diagnosing that the first relay is in the closing clamping stagnation abnormity.
本发明提供一种车辆用继电器诊断装置,其抑制多个继电器的动作不良的诊断变得繁杂这一情况。车辆用继电器诊断装置具有:第一检测部,其检测转换器的电压;第二检测部,其检测作为第一电线与第二电线之间的电位差的电压,该第一电线在第一继电器与转换器之间,该第二电线在第二继电器与蓄电部之间;第三检测部,其检测第一继电器的端子间的电压;以及控制系统。控制系统执行的处理包括:将蓄电部的电压与转换器的电压相匹配的步骤;诊断为第一继电器处于断开卡滞异常的步骤;向第二继电器输出闭合信号的步骤;诊断为第二继电器处于断开卡滞异常的步骤;诊断为第二继电器处于闭合卡滞异常的步骤;以及诊断为第一继电器处于闭合卡滞异常的步骤。
Relay diagnostic device for vehicle
车辆用继电器诊断装置
2025-05-23
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |