The requirements of laptop battery electric vehicles is relatively high, high specific energy, high specific power, fast charge and has a depth of discharge function, circulation and long service life, the biggest bottleneck constraints of electric vehicles is the battery. From the use of point of view, lead-acid battery as a relatively mature technology, mass production, its high cost-effective and high-rate discharge characteristics, but the specific energy, specific power and energy density are relatively low.

Ni-MH battery safety performance than the lithium battery is better, but the lithium battery a higher energy density and cycle life.At present, the domestic lithium battery production enterprises more, especially the rapid development of lithium iron phosphate battery.

At present, more and more researchers use lithium-ion battery electric vehicles as a motive power battery, because the lithium-ion battery has the following advantages: a high voltage, which is equivalent hydride nickel-cadmium battery – nickel battery three times; than the energy of large Sony VGP-BPS2C battery, up to 165WH / kg, nickel-hydrogen battery three times; size small; the quality of light; cycle life long; self-discharge rate is low; no memory effect; no pollution. If the use of lithium-ion battery, hard to reduce the cost of electric vehicles. Lithium iron phosphate battery is also a lithium battery, its specific energy less than half of lithium cobalt oxide battery, but its high security, cycles can reach 2000 times, discharge stability, cheap, a new car with Sony VGP-BPS5 battery power options.

In addition to increase the lithium battery research, business is also set out to find a new breakthrough in battery power. Currently BYD electric vehicle using battery power is called the “ET-POWER” iron motive power battery, it is BYD latest achievements in the battery area. Iron battery raw materials, a broad, non-polluting, recyclable, its heat resistance, resistance to stress and capacity are far stronger than ordinary MSI Wind U100 battery, battery charge of up to 2000 cycles over the battery life of more than 60 continuous miles kilometers. To F3DM, for example, in pure electric mode can be life 100 kilometers.