Solutions for power lithium batteries in electric vehicles. The substantial growth of new energy vehicles has also led to the explosive growth of power lithium batteries. Power lithium batteries are the power source that provides power for tools, mostly referring to the lithium batteries that provide power for electric vehicles, electric trains, electric bicycles, and golf carts. The power lithium battery industry can best be described as "ice and fire". The "Matthew Effect" of the industry is intensifying.

　　Market status of power lithium batteries

　　The overcapacity in the power lithium battery market is a structural excess that coexists with tight supply and overcapacity. The rise of ternary lithium batteries and the decline of other lithium batteries have led to a waste of production capacity such as lithium iron phosphate batteries, lithium manganese oxide, and lithium titanate, resulting in insufficient supply of high-end high-quality production capacity, while insufficient orders for low-end production capacity have resulted in serious product inventory backlogs , production and operation are difficult.

　　The expansion of power lithium batteries has rapidly moved the market from blue ocean to red ocean. Competition has become increasingly fierce, and sales prices have dropped year by year. Taking CATL as an example, the average sales price of power battery systems in CATL was 2.28 yuan/Wh in 2015, 2.06 yuan/Wh in 2016, and 1.41 yuan/Wh in 2017. Industry insiders predict that the industry’s average power battery selling price will drop below 1 yuan/Wh in 2018.

　　In addition, this year, my country's new energy battery industry is facing problems such as increasingly fierce price wars and structural overcapacity. Public information shows that in recent years, the production capacity of the power lithium battery market has continued to break new highs, and the growth rate of production capacity has continued to be higher than the sales growth rate of new energy vehicles. Last year, the industry's production capacity exceeded 200GWh, but the overall capacity utilization rate was less than 40%. In the future, power lithium battery companies must focus on R&D, technology and quality in order to seize more market share.

　　Characteristics of power lithium batteries

　　●High energy and high power;

　　●High energy density;

　　●Cyclic use under high rate partial state of charge (HRPSOC);

　　●Wide operating temperature range (-30~65℃);

　　●Long service life, requiring 5-10 years;

　　●Safe and reliable.

　　Solutions for power lithium batteries in electric vehicles

　　Electric vehicles are a mainstream trend in solving energy, environment, urban transportation and other issues, and are also a major direction for the future development of the automobile industry. In the cost structure of pure electric vehicles, the electric drive system accounts for more than 50% of the entire vehicle. Among them, lithium batteries are one of the keys, so there is a saying that "whoever gets lithium will win the world." Adhesives are one of the core factors to achieve stable, efficient, durable and safe operation of electric drive systems.

　　In recent years, electric bicycles, hybrid vehicles, electric vehicles, fuel cell vehicles, etc. powered by lithium batteries have received increasing attention from the market. The application of power batteries in the transportation field is of great significance for reducing greenhouse gas emissions, reducing air pollution, and applying new energy. Among them, lithium batteries have attracted more and more attention due to their high energy density, high number of recycles, light weight, and green environmental protection. Therefore, they have been widely used in portable handheld devices such as mobile phones, laptops, and power tools, and have been widely used in portable handheld devices such as mobile phones, laptops, and power tools. It has begun to enter high-power applications such as electric vehicles and electric vehicles, and has become a hot spot in the development of global electric vehicles.

　　As the core component of battery protection and management, the BMS lithium battery management system must not only ensure the safe and reliable use of the battery, but also give full play to the battery's capabilities and extend its service life. It serves as a communication bridge between the battery, vehicle management system and the driver. Battery management Systems play an increasingly critical role in electric vehicle performance.

　　The BMS lithium battery management system is closely integrated with the power battery of electric vehicles. It continuously detects the voltage, current, and temperature of the battery. It also performs leakage detection, thermal management, battery balance management, alarm reminders, and calculation of remaining capacity and discharge power. , reports the SOC&SOH status, and also uses an algorithm to control the maximum output power according to the voltage, current and temperature of the battery to obtain the maximum mileage, and uses an algorithm to control the charger for optimal current charging. It communicates with the vehicle master controller and motor control through the CAN bus interface. devices, energy control systems, vehicle display systems, etc. for real-time communication.

　　How to select lithium batteries for electric vehicles

　　1. Resolutely do not buy lithium batteries that are lower than the average wholesale price of the market.

　　2. Products that have not passed the market test for more than 2 years.

　　3. Do not buy batteries that are not supplied by electric vehicle manufacturers.

　　4. Do not buy high-priced batteries if they are not produced by a major manufacturer.

　　5. Do not buy lithium batteries that change the national standard size.

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