Through the world's first battery cooling technology, the Kirin battery can support 5 minutes of fast hot start and 10 minutes of fast charging. Under the same chemical system and the same size of the battery pack, the power of the Kirin battery pack is 13% higher than that of the 4680 system, achieving a comprehensive improvement in battery life, fast charging, safety, life, efficiency, and low-temperature performance. Kirin batteries will be mass-produced and launched in 2023.
It is understood that the Kirin battery conducts comprehensive simulations for the electrochemical reactions of the full life cycle and the actual vehicle requirements of the water cooling system, and builds a micron bridge connection device in the multi-functional elastic interlayer, which flexibly cooperates with the breathing of the battery core for free expansion and contraction, and improves the life of the battery core. cycle reliability.
At the same time, an integrated energy unit is composed of batteries and multifunctional elastic interlayers. Build a more stable force-bearing structure perpendicular to the driving direction, and improve the structural strength and impact resistance of the battery pack.
Kirin Battery also pioneered the large-surface cooling technology of the battery cell, which shortens the temperature control time of the battery cell to half of the original one. In extreme cases, Kirin battery cells can rapidly cool down to effectively block the abnormal heat conduction between cells, and effectively prevent irreversible damage caused by abnormal operating temperatures of the battery, improving the life and safety of the cells as a whole.
In fact, as early as March 26 this year at the 8th my country Electric Vehicle Hundreds Forum, CATL officially announced the launch of CTP3.0 batteries, which became the focus of the industry.
Wu Kai, Chief Scientist of CATL recently said at the 2022 World Power Lithium Battery Conference that the Kirin battery has the following characteristics: First, the CTP3. The heat conduction is reduced to prevent thermal runaway; second, because the water-cooled sheet has a buffer function, which greatly improves battery life; third, Kirin batteries can meet high-voltage fast charging, and 4C charging is not difficult; fourth, Kirin batteries can improve internal Space utilization, the energy density of the lithium iron phosphate system is 160Wh/kg, and the ternary high-nickel can reach 250Wh/kg, which is 13% more than the 4680 battery.
The 4680 battery is TSLA's third-generation battery product. In September 2020, TSLA debuted the battery at the Battery Day event. According to reports, the battery is 80 mm high and 46 mm in diameter. Compared with traditional lithium batteries, the energy density is increased by 5 times, the cruising range is increased by 16%, and the cost is reduced by 14%.
It is understood that CTP (the abbreviation of Cell to Pack in English, that is, no module power lithium battery pack) technology is to integrate the battery cells into the battery pack, reducing the gap between the modules and bringing about an increase in the utilization rate of the car volume , The energy density of the battery pack is greatly enhanced, the number of vehicle parts is reduced and the production efficiency is improved.
In September 2019, CATL and BAIC New Energy jointly launched the world's first CTP battery pack, which was installed on BAIC New Energy's hot model EU5 for the first time. Due to the cancellation of components such as module side panels and a number of processes, the overall utilization rate of the battery pack will increase by 15%-20%, and the production efficiency will increase by 50%.
CATL's second-generation CTP technology optimizes the two end plates of the module and integrates the cells directly into the battery box.
After CATL, many companies launched their own CTP products one after another:
In 2000, the blade battery (GCTP) launched by BYD adopted a module-free design, greatly reducing internal cables and structures, which eventually increased battery volume utilization by more than 50%, reduced the number of parts by 40%, and reduced costs. 30%.
The CTP technology of Honeycomb Energy includes two methods: no module method and large module method. Compared with the traditional 590 module, the first-generation CTP battery pack will reduce the number of components by 24%; the second-generation CTP will increase the weight group efficiency by 5%-10%, increase the space utilization rate by 5%, and further reduce the cost by 22%. Number of parts.
Based on the concept of soft-pack large modules, Jiewei Power launched LCM & building block batteries. The idea is to improve the space utilization rate by changing the thickness, length, and width of different batteries, and realize the arrangement of batteries in the form of building blocks in the battery pack. In the case of a certain cell width, the volume utilization rate of the building block battery can be increased by 8%-12%, and the cost can be reduced by 10%-15%. At present, Jiewei power building block battery technology has matured, and the samples have been sent to international car companies, and domestic large-scale promotion and application are imminent.
The battery capacity of Envision Power Soft Pack CTP will be doubled in the same space, and the battery life will be extended to 1000km. It is expected to be mass-produced in 2024
Next, CATL's goal is to mass-produce batteries that meet the requirements of no heat dissipation and a cruising range of up to 1,000km in 2023, and is expected to mass-produce battery-chassis combinations using CTC technology in 2025, bringing the most important part of electric vehicles The two components are integrated into one.