Provided are an insulation resistance detection device and a fault detection method capable of detecting a fault in a measurement unit that measures a voltage applied to a detection resistor. An insulation resistance detection device according to an embodiment includes a measurement unit and a control unit. The measuring unit is provided with: a first switch connected to the positive electrode side of the battery; a second switch connected to the negative electrode side of the battery; a detection resistor; and a measurement circuit that measures the voltage applied to the detection resistor. The control unit turns on one of the first switch and the second switch and turns off the other switch, thereby forming a series connection circuit of the battery, the insulation resistance of the battery, and the detection resistance, and calculates the insulation resistance based on the voltage measured by the measurement circuit. The control unit turns on the first switch and the second switch to form a series connection circuit of the battery and the detection resistor, and detects a fault of the measurement unit on the basis of the voltage measured by the measurement circuit.
提供一种能够检测对施加于检测电阻的电压进行测量的测量部的故障的绝缘电阻检测装置以及故障检测方法。实施方式所涉及的绝缘电阻检测装置具备测量部和控制部。测量部具备:与电池的正极侧连接的第一开关;与电池的负极侧连接的第二开关;检测电阻;以及对施加于检测电阻的电压进行测量的测量电路。控制部接通第一开关及第二开关中的一个开关并断开另一个开关,从而形成电池、电池的绝缘电阻和检测电阻的串联连接电路,基于由测量电路测量的电压计算绝缘电阻。控制部接通第一开关及所述第二开关,形成电池和检测电阻的串联连接电路,基于由测量电路测量的电压检测测量部的故障。
Insulation resistance detection device and fault detection method
绝缘电阻检测装置以及故障检测方法
2023-06-27
Patent
Elektronische Ressource
Chinesisch
Insulation resistance detection device and fault detection method
Europäisches Patentamt | 2023
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