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发明公开
CN107144735A 一种电动汽车电池组绝缘电阻检测系统、方法和电动汽车 无效 - 驳回

一种电动汽车电池组绝缘电阻检测系统、方法和电动汽车
摘要：
本发明提出一种电动汽车电池组绝缘电阻检测系统、方法和电动汽车。检测系统包括：第一已知测量电阻，与电池组正极端子的绝缘电阻并联；第二已知测量电阻，与电池组负极端子的绝缘电阻并联；第一开关，与第一已知测量电阻串联；第二开关，与第二已知测量电阻串联。本发明提出一种高压系统寄生电容自适应的绝缘电阻检测方案，避免了寄生电容对绝缘电阻检测的不利影响，可以准确测量绝缘电阻值。
摘要（英）：

The invention provides a system and a method for detecting insulation resistance of a battery pack of an electric vehicle, and the electric vehicle thereof. The system comprises the components of a first known measuring resistor which is parallelly connected with the insulating resistance of an anode terminal of the battery pack; a second known measuring resistor which is parallelly connected with the insulating resistance of a cathode terminal of the battery pack; a first switch which is serially connected with the first known measuring resistance; and a second switch which is serially connected with the second known measuring resistor. The system, the method and the electric vehicle according to the invention are adapted with the parasitic capacitance of a high-voltage system and furthermore perform functions of preventing an adverse influence of the parasitic capacitance to insulation resistance detection and accurately measuring the insulation resistance.

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