Insulation fault detection method and system for new energy automobile power battery

The invention provides an insulation fault detection method and system for a new energy automobile power battery, and the method comprises the steps: obtaining the test data of the new energy automobile power battery, and carrying out the classification marking of the test data, and obtaining a sub-test data set; analyzing each sub-test data group based on a classification marking result, and judging whether the new energy automobile power battery has an insulation fault or not; and when the insulation fault exists, determining the fault type of the insulation fault and the severity of the insulation fault, and carrying out alarm reminding based on the fault type and the severity. By effectively analyzing the test data of the new energy automobile power battery, whether the battery has an insulation fault or not can be found in time, and the fault type and severity of the insulation fault can be accurately determined when the insulation fault exists, so that the efficiency and accuracy of insulation fault tro