Lithium Battery Knowledge

The BMS battery management system is simply the steward of the battery, which plays important functions such as ensuring safety, extending the service life, and estimating the remaining power. , reduce the loss caused by battery damage.

As one of the current battery types for electric vehicles, LiFePO4 batteries are characterized by relatively stable thermal stability, low production costs, and long service life. However, its low temperature resistance is very low. In the case of -10 ℃, although the battery can be used normally, the charging efficiency will be greatly reduced.

Lithium-ion batteries have the advantages of high energy density, long cycle life, low self-discharge rate, no memory effect, green environmental protection, etc., and have broad application prospects in the field of energy storage. At present, lithium-ion battery technology mainly includes lithium cobalt oxide, lithium manganate, lithium iron phosphate, lithium titanate and other different types. From the perspective of market application prospects and technology maturity, lithium iron phosphate batteries are recommended as the first choice in the field of energy storage.

With the development of lithium battery technology, there are more and more types of cylindrical lithium batteries. Cylindrical lithium ion batteries are divided into lithium cobalt oxide, lithium manganate, and ternary materials. The three material system batteries have different advantages. Let's take a look at the models and specifications of cylindrical lithium batteries.

What is the real lifespan of a LiFePO4 battery pack? In fact, the lifespan of lithium battery packs is similar. Whether it is a LiFePO4 battery or a ternary lithium battery, the actual service life is related to the user's usage and protection. In this article, how long is the real life of a LiFePO4 battery pack?

LiFePO4 battery has a series of unique advantages such as high working voltage, high energy density, long cycle life, low self-discharge rate, no memory effect, green environmental protection, etc., and supports stepless expansion, suitable for large-scale electric energy storage, in renewable Energy power stations have good application prospects in the fields of safe grid connection of power generation, power grid peak regulation, distributed power stations, UPS power supplies, and emergency power supply systems.

Ternary lithium batteries generally refer to ternary polymer lithium batteries. Ternary polymer lithium battery refers to a lithium battery whose positive electrode material uses nickel cobalt lithium manganate (Li(NiCoMn)O2) ternary positive electrode material. The precursor product of ternary composite positive electrode material is nickel salt, cobalt salt, manganese salt. As the raw material, the ratio of nickel, cobalt and manganese in it can be adjusted according to actual needs. The battery with ternary material as the positive electrode is safer than the lithium cobalt oxide battery, but the voltage is too low, so it is used in mobile phones (the cut-off voltage of mobile phones is generally around 3.4V). ) will have a clear feeling of insufficient capacity.

Research published in the latest issue of the American Chemical Society "NanoLetters" shows that Chinese scientists are expected to develop a lithium battery that is resistant to combustion and explosions. This lithium battery made of new materials is flexible, low-cost and safer.

Lithium manganese iron phosphate (LMFP) is a new type of cathode material obtained by adding manganese element on the basis of LiFePO4. On the one hand, it can improve the voltage of the material system and make up for the lack of low energy density caused by low voltage of LiFePO4; The surface is coated with a carbon material conductive agent to improve the conductivity. So, what are the advantages of LMFP cathode material?

Ternary lithium-ion batteries refer to lithium-ion batteries that use three transition metal oxides of nickel, cobalt, and manganese as cathode materials. Compared with lithium iron phosphate batteries, ternary lithium-ion batteries have more average overall performance and higher energy density. high, the volume specific energy is also higher. Because it combines the advantages of lithium cobaltate, lithium nickelate and lithium manganate, its performance is better than any of the above single-component cathode materials.