Why do you need to use lithium iron phosphate battery for BYD?

Date:Oct 30, 2019

The energy density is low and the cold resistance is poor. Why do you need to use lithium iron phosphate battery for BYD?

The battery is the core component of the car for the vehicle. It is related to the safety of the vehicle and the cruising range of the vehicle. For the new energy electric vehicles currently on the market, most of them use a ternary lithium battery, but as a battery. BYD, the leader of domestic new energy vehicles, uses lithium iron phosphate batteries for most models. For lithium iron phosphate battery, it is characterized by the absence of precious elements such as cobalt, low raw material prices and resources such as phosphorus and iron. The content is rich, there will be no shortage of raw materials; and the stability in high temperature and high heat environment is high, the disadvantage is that the energy density of the battery is low and the cold resistance is poor.

Why is BYD still using lithium iron phosphate battery? In this case, it is necessary to consider the safety performance of the battery. For the battery, it is necessary to ensure the use of a safe, reliable, low-cost power battery, and lithium iron phosphate. In terms of cost, the battery is lower than the ternary lithium battery. Since the lithium iron phosphate battery does not require precious metal materials, the comparative production cost is low, so that the production cost of the vehicle can be controlled.

Secondly, for the lithium iron phosphate battery, the thermal runaway temperature of the battery is basically above 500 degrees, and compared with the ternary lithium battery is about 300 degrees, so the thermal stability of the ternary lithium battery is lower than that of lithium iron phosphate. Battery, the last is the battery life, compared to the ternary lithium battery, lithium iron phosphate battery life is longer than the ternary lithium battery, according to the life of the ternary lithium battery, the battery cycle life is 2000 times There will be a decline after the discharge cycle, and it will be more than 3,000 times for the iron phosphate battery.

In summary, although the energy density of lithium iron phosphate battery is not as good as that of ternary lithium battery, it is higher in terms of the cost of use and the service life of the battery, and ultimately the cost of the battery is low. Cathode materials are actually more common, and cost reduction does not mean that it does not take up too much resources....

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