There are five types of lithium batteries for new energy vehicles:

1. Nickel cadmium battery - voltage 1.2V, strong overcharge resistance, but due to the relatively low voltage, the life is not very long.

2. NiMH battery: the voltage is 1.2V. At present, the automobile battery has the longest service life, but the voltage is still relatively low.

3. Lithium ion battery: the voltage is 3.6V, the weight is about 40% lighter than NiMH battery, but the capacity is 60% or more higher than NiMH battery. The life of lithium ion battery is the same as that of nickel cadmium battery, but it is not resistant to overcharge. High temperature is easy to cause structure damage and spontaneous combustion or explosion. It is also the most widely used battery for new energy vehicles.

4. Lithium polymer battery: the voltage is 3.7V, and the improved lithium-ion battery is more stable than the former. It is also the highest technology of lithium battery in common new energy vehicles at present.

5. Lead acid battery: the voltage is 2.0V. It is a common battery for vehicle battery, with long service life, large volume and weight.