Which one is suitable for new energy vehicle, Nickel-metal hydride battery or lithium-ion battery?

As industry development, battery era has gone through lead-acid battery to nickel cadmium battery, and now is the stage of nickel hydride battery and lithium ion battery, an era of green battery. However, which one is better, Nickel hydride battery or lithium battery?

On June 25, 2009, the ministry of the new energy automobile production enterprises and products access management rules, the rules implemented on July 1.In the "rules", to start period, new energy vehicles into three different stages of technology development and maturity. Hydrogen fuel cell vehicles, cars and dimethyl ether engine cars are included in the initial stage; Lithium ion power battery powered hybrid electric passenger cars, commercial vehicles, and pure electric vehicles, belong to development; Use lead-acid battery and nickel metal hydride battery hybrid passenger car is mature., it is worth noting that in the industry generally optimistic about the lithium battery electric vehicles fell after the Ni-Mh battery hybrid, drawn in the development.

Ni-Mh batteries to accelerate forward

Nickel metal hydride batteries (Ni - MH Batteries) as an early nickel cadmium battery replacement product, it is the most environmentally friendly batteries, no longer use poisonous cadmium, can eliminate the heavy metals pollution to the environment problem. Ni-Mh batteries has higher energy density than, this means that you can not to add additional weight to digital devices, use Ni-Mh batteries can effectively extend the working hours of equipment. Ni-Mh batteries another advantage is that greatly reduced the nickel cadmium battery "memory effect", in which nickel metal hydride batteries can be more convenient to use.

Why Ni-Mh batteries to replace the most favored by people of lithium battery? It makes sense. First of all, the Ni-Mh battery market since the 1990 s, after the market inspection period is longer. Secondly Ni-Mh sufficient mineral resources; Again, many domestic manufacturers, Guangdong alone there are more than 100 do Ni-Mh battery of private enterprises; Fourth, compared with li-ion battery, nickel metal hydride batteries is characterized by high security, it is not easy to explode.

Ni-Mh battery is the most mature application in the field of HEV auto secondary battery. But in perspective, there are some "grip" Ni-Mh batteries: refining technology is not mature, the cost is too high. There is a big hidden danger is that once widespread promotion, recovery of problem in the future. In the long run, nickel metal hydride batteries will face stiff challenges from lithium ion battery, but in the short term, the Ni-Mh batteries in the coming era of new energy is still promising.

Lithium battery stars of the future

Since 1991 since the commercialization of the lithium ion battery industry developing quickly, among them Polymer lithium ion batteries In security, volume, quality, capacity and discharge performance is better than that of liquid lithium ion battery, wider application range.

At the fifth session of Beijing international electric car exhibition of clean energy vehicles, reporters found that when the bus manufacturers bring exhibitors pure electric bus almost all adopt the lithium battery. Faw passenger car use Lithium power battery, in the Daqingshan pure electric passenger cars, interpretation of Shandong star adopted lithium iron phosphate batteries, including phosphoric acid lithium ion electron, objects and iron lithium phosphate series of lithium battery has been fully display.

Song Jian, the executive vice president of institute of automotive engineering of Tsinghua University, said that currently, 99% of the world hybrid battery market shares nickel metal hydride battery, and nickel hydride battery technology in domestic development is more mature. But the price of nickel is expensive, nickel hydride batteries on the production costs a lot higher than the lithium-ion battery. Compared with Ni-Mh battery, a new generation of lithium-ion battery will reduce half of its weight, and battery capacity even doubles. The mileage after a single charging will greatly improve. And the service life of Ni-Mh batteries in the next three to five years will reach its limitation. Generally speaking, the lithium-ion battery will become the source of power in the future in new energy vehicle development.

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