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Is it better to use lithium-ion battery or lead-acid battery for new energy vehicles? Battery is one of the core components of new energy vehicles. According to the type of battery, it can be divided into lead-acid battery and lithium-ion battery. Lithium-ion batteries have higher discharge efficiency and better endurance.

Is it better to use lithium-ion battery or lead-acid battery for new energy vehicles?

At present, new energy vehicles use lithium-ion batteries as power lithium batteries. As we all know, the price of lithium-ion batteries is very expensive. After several price reductions, the cost per watt hour is still as high as about 1 yuan at the end of 2018. The battery capacity of mainstream electric vehicles is about 60kWh. If tax is included, it will be more than 70000 yuan.

In terms of energy density, the current energy density of lead-acid batteries is about 50-70wh/g, while the energy density of lithium-ion batteries is generally 200-260wh/g, which means that under the same weight of batteries, the discharge efficiency of lithium-ion batteries is higher, and the endurance is also stronger. In terms of the current market performance, the demand for new energy vehicles with strong endurance is relatively large, so lithium-ion batteries occupy a complete advantage in this respect.

2. Service life

Generally speaking, the current lithium-ion batteries are more popular are ternary lithium-ion batteries and iron lithium-ion batteries. Generally, the cycle times of ternary lithium-ion batteries can reach more than 1000, while the cycle times of iron-lithion batteries can reach 2000. However, the cycle times of lead-acid batteries are only about 300-350, so the service life of lithium-ion batteries is about 3-6 times that of lead-acid batteries.

3. Safety

If the lead-acid battery is charged for a long time, there will be a lot of hydrogen and oxygen. If these gases are not discharged in time, they will explode in the event of an open fire, which is also very dangerous. At present, most lead-acid batteries in the market are not overcharged, which means that once overcharged, it is likely to be dangerous. In this regard, lithium-ion batteries are relatively safer.

4. Weight

Lead-acid batteries contain a large amount of lead and sulfuric acid. The density of lead is 11.3437g/cm3, and the density of sulfuric acid is 1.8305g/cm3; The density of lithium, an important component of lithium-ion batteries, is only 0.534g/cm3. Therefore, even if other components are included, the weight of lithium-ion batteries with the same volume is only about one-third of that of lead-acid batteries.

5. Charge and discharge ratio

The lead-acid battery does not support high rate charging and discharging, so it does not support DC fast charging, nor does it support the operation of high speed motors. If the lead-acid battery is used as the lithium battery for new energy vehicles, the maximum speed of the vehicle is estimated to be less than 100 kilometers, and the climbing ability and acceleration performance will also decline a lot.

In general, although lead-acid batteries are not as good as lithium-ion batteries in all aspects of performance, they are cheaper and more durable. However, at present, the development potential of lithium-ion batteries is higher than that of lead-acid batteries, and they are also very suitable as the power source of new energy vehicles.

Although the price of lithium-ion battery is higher, its advantages determine that it is more suitable than lead-acid battery as the power lithium battery of new energy vehicles.

Summary: The lithium-ion battery, rather than lead-acid battery, is selected as the power lithium battery for new energy vehicles, because lithium-ion battery is more suitable for use as power lithium battery than lead-acid battery, even if the price is higher, but the use effect is better.

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