What are the batteries of new energy vehicles

1. Lead acid battery

Lead acid battery has the advantages of low cost, good low temperature performance and high cost performance; Low energy density, short service life, large volume and poor safety. Due to the low energy density and service life, electric vehicles as power can not have good speed and high range, which are generally used for low-speed vehicles.

2. Ni MH battery

Ni MH battery has the advantages of low cost, mature technology, long service life and durability; Low energy density, large volume, low voltage and battery memory effect. Although its performance is better than that of lead-acid battery, it contains heavy metals and pollutes the environment after abandonment.

3. Lithium manganate battery

Lithium manganate battery is a cathode material with low cost, good safety and low temperature performance, but the material itself is not very stable and is easy to decompose to produce gas. Therefore, it is mostly used in combination with other materials to reduce the cost of the cell. However, its cycle life decays rapidly, prone to bulging, poor high temperature performance and relatively short service life. It is mainly used for large and medium-sized cells, In terms of power battery, its nominal voltage is 3.7V.

4. Lithium iron phosphate battery

Lithium iron phosphate battery has the advantages of good thermal stability, safety, low cost, long service life, low energy density and low temperature. When the battery temperature is 500-600 ℃, its internal chemical components begin to decompose, and puncture, short circuit and high temperature will not burn or explode, and its service life is long. However, the vehicle range is general. When the temperature is lower than - 5 ℃, the charging efficiency is low, which is not suitable for the charging demand in the north in winter.

5. Ternary lithium battery

Ternary lithium ion battery has high energy density, long cycle life and is not afraid of low temperature; Insufficient stability at high temperature. The energy density can reach the highest, but the high temperature performance is relatively poor. For pure electric vehicles with requirements on endurance mileage, it is the mainstream direction and suitable for Northern weather. The battery is more stable at low temperature.