Battery life control method for electric automobile

The invention belongs to the field of electric vehicles. The invention particularly relates to a battery life control method for an electric vehicle. A test element, a temperature sensor, a Hall sensor, an SOC estimation module, a voltage/temperature calculation module, an SOH calculation module, a main control module, an ECU, a storage unit of the ECU, a delayer and a battery fan control elementare included. The test element is a single battery in a battery pack, a temperature sensor and a Hall sensor are connected to an interface of each single battery to respectively detect the temperatureand the voltage of the single battery, and detection data is transmitted to an SOC estimation module and a voltage/temperature calculation module in the battery management system through a CAN bus; and when the detected temperature value or voltage value exceeds a set threshold value, the digital signal is converted into an electric signal, and the interface temperature and the output voltage ofthe battery are fed back an