Automobile slow charge and fast charge test voltage resistance method:
The resistance value of the car is measured with an ohmmeter (the measurement of electrical barrier of a multimeter). In most cases, a multi-range measuring instrument (multimeter) is used to avoid reading errors and inaccuracies. Note the following points when measuring resistance:
The component to be measured must not be connected to the voltage supply during the measurement, because the ohmmeter uses its own voltage supply and determines the resistance value by voltage or current.
② At least one side of the component to be tested must be separated from the circuit, otherwise the parallel component will affect the measurement result
1. When testing the insulation resistance of all high-voltage components, the insulation should be measured under the premise of turning off the power battery maintenance switch and the negative line of the low-voltage battery (if the charging plug needs to be disconnected during charging).
Disconnect the high voltage connection line of each high voltage component, and test the insulation resistance of the high voltage positive and negative extremes in the high voltage input and output interface of each high voltage component to the body with a 1000V megohm meter.