The invention discloses an insulation resistance detection device of a new energy automobile, the new energy automobile and an insulation resistance detection method of the new energy automobile, and the device is characterized in that a bus voltage positive end of a power battery passes through a first sampling module, a first switch module and a first detection module; a first detection voltage is detected when the first switch module is turned on and the second switch module is controlled to be turned off; after passing through a second sampling module, a second switch module and a second detection module, the bus voltage negative end of the power battery detects a second detection voltage when the first switch module is switched off and the second switch module is controlled to be switched on; under the condition that the first detection voltage and the second detection voltage are detected, first insulation resistance and second insulation resistance are obtained through calculation. According to the scheme, in the process of detecting and calculating the resistance value of the insulation resistor, the two switch modules are adopted to realize interlocking, so that the detection difficulty is reduced.
本发明公开了一种新能源汽车的绝缘电阻检测装置、新能源汽车及其绝缘电阻检测方法,该装置包括:动力电池的母线电压正端,经第一采样模块、第一开关模块和第一检测模块后,在第一开关模块开通且控制第二开关模块关断时检测到第一检测电压;动力电池的母线电压负端,经第二采样模块、第二开关模块和第二检测模块后,在第一开关模块关断且控制第二开关模块开通时检测到第二检测电压;在检测到第一检测电压和第二检测电压的情况下,计算得到第一绝缘电阻和第二绝缘电阻。该方案,通过在对绝缘电阻的阻值进行检测和计算的过程中,采用两个开关模块实现互锁,使得检测难度减小。
New energy automobile and insulation resistance detection device and method thereof
一种新能源汽车及其绝缘电阻检测装置、方法
2023-11-24
Patent
Electronic Resource
Chinese
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