The emergence of the electric vehicle industry has driven the development of electric vehicle batteries, and the two complement each other. Electric vehicles need batteries, and batteries can only realize their value in electric vehicles. So which electric vehicle battery technology is strong? Many electric vehicle owners will pay attention to the battery problem. Today, the power lithium battery shell technicians will analyze with you:Which electric vehicle battery technology is strong?
1. Power lithium ion battery
Lithium-ion batteries use light metal lithium. Although they do not contain harmful heavy metals such as mercury and lead, they are environmentally friendly and have little environmental pollution. But in fact, as cathode materials and electrolytes containing metals such as nickel and manganese, lithium-ion batteries in the United States are listed as a kind of battery that contains flammable, leaching toxicity, corrosive, reactive, toxic and harmful batteries. For these types of batteries, the recycling process is more complicated, leading to higher costs, so the current recycling rate is not high, and the impact of waste batteries on the environment.
2. Hydrogen fuel power battery
Hydrogen fuel power battery is an efficient and clean energy. It not only emits very little water, but also is very clean, so there is no water pollution problem. At the same time, unlike the engine, the fuel power cell does not convert thermal energy into mechanical energy, but directly converts chemical energy into electrical energy and thermal energy, which makes the energy conversion efficiency high and low noise. Hydrogen fuel power batteries do not require large and complex configurations for power generation, and battery stacks can be assembled in modules.
3. Ni-MH rechargeable battery
As the cadmium in nickel-cadmium batteries is toxic, which complicates the disposal of waste batteries and pollutes the environment, it will gradually be replaced by nickel-hydrogen rechargeable batteries (ni-mh) made of hydrogen storage alloys. In terms of battery power, the battery power of the same size Ni-MH rechargeable battery is about 1.5 to 2 times that of the Ni-Cd battery, without cadmium pollution. At present, Ni-MH rechargeable batteries have been widely used in small portable electronic devices such as mobile communications and notebook computers. Ni-MH batteries are composed of hydrogen ions and nickel ions. The battery capacity is more than 30% larger than the nickel-cadmium battery, lighter than the nickel-cadmium battery, and has a long service life and no pollution to the environment.
4. Super capacitor
The low energy density of ultracapacitors is one of the bottlenecks of its application, only 1/20 of that of lithium-ion batteries, which is about 10wh/kg. Therefore, it cannot be used as an important power source for electric vehicles, but is important as an auxiliary power source, and is mainly used for quick start devices and braking energy recovery devices. The charge transfer of the supercapacitor occurs on the surface of the active material of the electrode, so the capacity attenuation of the temperature is very small, and the capacity of the lithium ion battery usually attenuates by 70% at low temperatures.
5. Aluminum-air battery
The anode active material of the aluminum-air battery is metal aluminum, which is rich in content, low in price, and environmentally friendly. The anode active material is oxygen in the air, and the anode capacity can be seen to be infinite. Therefore, aluminum-air batteries have the advantages of light weight, small size, and long service life. Air electrode polarization and aluminum hydroxide deposition are important obstacles to the marketization of metal-air batteries. At present, it is still in the experimental stage, and there is still a long way to go before commercial promotion.
From the above analysis, we can see the advantages of electric vehicle battery technology. Although the recycling and reuse rate of lithium-ion batteries is not high, it is undeniable that lithium-ion batteries are the most widely used and most mature technology in electric vehicles. In addition, researchers have been committed to the recycling of lithium-ion batteries.