What are the advantages of lithium iron phosphate batteries

First of all, safety is a necessary condition for cars. Cars are different from mobile phones and computers. Cars may encounter many unpredictable factors during high-speed driving, such as battery squeezing and bumping caused by car accidents. Any one of the unfavorable factors may cause car crashes and deaths. We can see that some poorly used lead-acid batteries used in scooters in the late years have no safety guarantee at all. There are many cases of battery spontaneous combustion and collision incineration. Another example is the successive fires of Tesla in the past year, although the safety plan that benefited Tesla did not show any casualties. But at the same time, we must also see that these few incidents were very minor collision accidents. The collision itself did not damage the car or people, but the battery caught fire. What if it is a more severe accident? 2. High-rate discharge life The service life of ordinary cars is as long as decades, and the battery of an electric car needs at least 3,000 cycles of life in 10 years. As a relatively expensive component, it is very important that the battery life is equal to that of the car. It is necessary to ensure the performance of the vehicle and the interests of the car owner, so as to facilitate the promotion of the market. At present, only BYD Qin, which went on the market last year, has a life-long warranty for battery cells among the electric cars of various international car companies. The battery life is also the cycle life, not the number given by simple battery parameters. The cycle life of the battery is closely related to the cycle state of the battery, such as discharge rate, charge rate, temperature, etc. Generally, the cycle life obtained from the battery laboratory data is obtained at a stable charge and discharge rate of 0.3C and a stable optimal temperature of 20 degrees. But in the process of using the car, the magnification and temperature are not stable. This is the reason why the battery life of laptops, mobile phones, or battery cars is usually far less than the data given by the manufacturers. As for the small-to-medium distance pure electric and long-range dual-mode hybrid electric vehicles, due to the relatively small number of batteries, the discharge requirements will be higher, and the impact on the lifespan will be greater. 3. Temperature adaptability The impact of extreme cold on the battery is important to show that the current charge and discharge rate is low and the capacity is reduced; the impact of extreme heat on the battery is mainly manifested in the reduction of lifespan, high temperature safety, and decline in charge and discharge capabilities. The impact of extreme cold on batteries is relatively light. Generally, lithium batteries can be used below minus 20 degrees Celsius, and heat is generated by themselves during the discharge of the battery, but the increase in energy consumption and the reduction in power cannot be guarded. 4. Energy density Energy density, as the name implies, is the energy that a unit weight of the battery can contain. Energy density is usually an important indicator for judging battery performance, but in my decomposition system, energy density is not very important in battery performance indicators. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: A brief history of the development of polymer lithium batteries with RC models