Research on the integration technology of soft pack power lithium-ion battery pack

Summary of research on soft pack power battery pack integration technology: The development of science and technology, environmental requirements, national policies and other trends have brought the electric vehicle industry into an explosive period. The soft pack power lithium-ion battery has high safety performance, high energy density, and low cost. , Long life and other advantages, are widely favored by automobile companies. A soft pack battery with integrated technology is proposed based on adhesive paste and fixation, which can realize the rapid assembly of soft pack power lithium-ion battery packs, and effectively ensure the reliability and vibration reduction of the battery pack. It is an integrated research software with important practical significance. Pack electric vehicle power lithium-ion battery pack. Key words: soft pack power lithium-ion battery; electric vehicle; analysis of integrated technology. In the 12th Five-Year Plan period, my country has strongly supported the development of new energy electric vehicles. The three successful factors of high-tech planning, government policies, cost and convenience have promoted the development of electric vehicles. The car market is booming. Especially since last year, the new energy vehicle market has gradually opened up. In 2014, the output of new energy vehicles increased nearly 4 times over the same period of the previous year, and the output in the first quarter of 2015 increased 2.5 times over the same period of the previous year. An important factor affecting the development of electric vehicles is power lithium-ion batteries. In recent years, mainstream electric vehicle companies such as Dongfeng and BYD have begun to adopt a large number of soft pack power lithium-ion batteries. Soft pack power lithium-ion batteries are favored by more and more people because of their high safety performance, high energy density, low cost, long life and other advantages. Major soft-pack battery manufacturers, including Samsung SDI, Dongguan ATL, Sony, LG, etc., are stepping up research on soft-pack power lithium-ion batteries, but the research on soft-pack power lithium-ion battery integration technology lags behind electric vehicles. The development of the market. The power lithium-ion battery of the soft pack fastening method, battery tab connection mode and testing, etc., proposed a comprehensive power lithium-ion battery technology model based on adhesive pasting the soft pack, and the test results show that this method can quickly achieve integration The power of the soft pack battery can effectively ensure the reliability and vibration resistance of the battery pack. The research on the integration of lithium-ion batteries and soft packs for electric vehicle power has important practical significance. The soft pack battery refers to a lithium battery with a soft packaging material (usually an aluminum-plastic composite film) as the outer shell. It has the advantages of small size, light weight, high specific energy, high safety, and flexible design. The structure of the soft pack power lithium-ion battery is packaged with aluminum-plastic film, and the positive and negative batteries also use the structure of battery tabs, which is different from the general plastic shell and metal shell battery. Therefore, the fastening and series-parallel connection of soft-pack power lithium-ion batteries are two major difficulties in the integration of soft-pack power lithium-ion batteries. At present, there are few researches dedicated to the integration of power lithium-ion battery technology for soft packs. Some companies or university laboratories use soft pack batteries to install PVC plastic sleeves made in molds, and the battery tabs are welded with the nut according to the requirements. The battery pack is bolted in series. This method not only increases the weight of the battery pack, but also reduces the energy density of the soft pack power supply. According to the form of soft-powered soft-pack batteries, it is not easy to fix, and will appear on the surface properties of scratches, pits, creases, etc., etc., studied the fastening method of the adhesive, the dispensing machine to the power of the soft-pack battery assembly , Use a special cooling aluminum shell and adhesive, and paste it together with the glue single battery and the heat sink aluminum according to the requirements of series and parallel connection to realize the fastening of the battery pack. This method not only ensures the reliability and vibration resistance of battery fastening, but also facilitates assembly. 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: Analysis of the difference between lithium batteries and lead-acid batteries