3.7V Lithium Polymer Battery

my country's technology in 3.7V Lithium Polymer Battery is relatively mature

In recent years, with the global air pollution and the continuous reduction of petroleum energy. Electric vehicles are being vigorously developed all over the world. my country is no exception and has also introduced many preferential policies to stimulate consumers to choose electric vehicles. Under the continuous promotion of preferential policies, the development of electric vehicles is very rapid, and the number of electric vehicles in my country is also increasing. But we often hear news about electric cars igniting or even exploding. At present, it is a period of vigorous development of electric vehicles. Such problems will undoubtedly have a huge impact on manufacturers. Not only that, the entire electric vehicle industry will also suffer a heavy blow.

The core components of electric vehicles are motors and batteries. The culprit for spontaneous combustion and explosion is the battery of electric vehicles. So are the batteries of electric vehicles safe now?

From the internal structure of the battery, the fire of lithium-ion batteries is caused by thermal runaway inside the lithium-ion battery. It is mainly because the motor and the electrolyte have a strong chemical reaction. The current commercial lithium-ion battery positive electrode materials are lithium iron phosphate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, etc. The negative electrode part generally uses graphene and lithium titanate. The electrolyte uses organic solvents and lithium salts, and the main component of the diaphragm is a composite material. In terms of the positive electrode, lithium iron phosphate requires a higher temperature for thermal decomposition and releases the least heat, making it the safest positive electrode material at present. Among the negative electrode materials, iron phosphate is the safest.

During the cycle of charging and discharging, the battery reacts chemically inside the battery continuously, which will cause the battery to age, and battery aging will also affect safety. In practical applications, battery spontaneous combustion occurs from time to time. Therefore, for the safety of new batteries that have not been recycled, it is not possible to fully explain why spontaneous combustion occurs. At present, according to the materials used in the negative electrode, power batteries can be roughly divided into two categories: carbon negative electrode batteries and lithium titanate negative electrode batteries.

Because of the special internal structure of carbon negative electrode batteries, after long-term use, they will affect the activity and structure of the electrode, cause changes in the diaphragm morphology, and increase the possibility of damage. Batteries are prone to thermal runaway in the case of short circuit, overcharge or extrusion, which can cause natural phenomena.

Compared with carbon negative electrode batteries, 3.7V Lithium Polymer Battery are very stable and have higher embedding points, which greatly reduces the probability of short circuit inside the battery. Moreover, the activity of the reaction between lithium titanate and the electrolyte is very low, and almost no special reactions will occur, and the stability and safety are very high. Moreover, lithium titanate can absorb the oxygen produced by the positive electrode decomposer very well, greatly reducing the risk of thermal runaway, thereby improving the safety performance of the battery. Batteries using lithium titanate as negative electrodes are much stronger than carbon negative electrode batteries in terms of safety performance and service life. In fact, the safety performance of power batteries depends largely on the selection of batteries and the manufacturing process of batteries. The emergence of 3.7V Lithium Polymer Battery has dispelled people's fear of new energy vehicle batteries. At present, my country's technology in 3.7V Lithium Polymer Battery is relatively mature. It is mainly used in the fields of buses and shuttle buses.

3.7V Lithium Polymer Battery can not only reassure everyone in terms of safety, but also charge very quickly. Unlike the two-dimensional lithium ion transmission channel of traditional carbon negative electrode materials. The spinel structure used by lithium titanate has a faster transmission channel. The battery can be charged in a very short time. It can also complete charging and discharging in a particularly cold environment, which greatly improves the convenience of user use. However, the disadvantages of 3.7V Lithium Polymer Battery are low density and insufficient endurance. However, after years of development, the density of 3.7V Lithium Polymer Battery has increased by nearly 60% compared with a few years ago, and the gap with other batteries has been continuously narrowed, and the endurance has been improved. The advantage of fast charging can completely make up for this.

As oil continues to decrease, new energy vehicles must be the trend of future development, and electric vehicles also belong to this category. Electric vehicles will also become the focus of development in the automotive industry. Although electric vehicles are constantly developing, we cannot ignore the dangers brought by batteries. Some accidents that have occurred have also sounded the alarm for major battery manufacturers. The most important thing is to completely solve the safety problem of batteries. In fact, it is to make a fuss about endurance. After all, the safety of cars is above all else. What do you think of the future development of electric vehicles?

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