Advantages and disadvantages of soft pack polymer lithium battery

If the cylindrical lithium battery is the standard configuration of the power battery, then the soft-packed polymer lithium battery is a good person for consumer digital electronics. The body is soft and the shape can be large or small. It is widely used in Bluetooth headsets, smart phones, and home appliances. On many other devices, the advantages of the soft-pack polymer lithium battery are obvious, but the disadvantages are also the same; the soft-pack polymer lithium battery literally means that the liquid soft liquid lithium-ion battery is covered with a polymer shell . The biggest difference from other batteries is the use of aluminum-plastic film as the battery cell encapsulation material. For the soft-pack polymer lithium battery, the soft-pack battery has good safety performance, and its volume is better. In other words, the advantages of light weight, large capacity, low internal resistance, and flexible design began to gradually show its advantages and prominent status. The soft-pack polymer lithium battery is structured with aluminum-plastic film packaging. The biggest advantage of aluminum film packaging is that it has a certain degree of flexibility. When the battery has a safety problem, the soft-pack battery will generally burst and the internal liquid will leak. There will be no explosion or fire due to the gas being not discharged. This is different from the steel shell or aluminum shell battery in that the advantages of this battery are still predictable. Secondly, the weight of the battery is light. For electric vehicles, the installation of soft-pack batteries can reduce the weight of the batteries, which can increase the cruising range of the vehicle to a certain extent. Advantages of soft-packed polymer lithium battery: soft-packed battery, aluminum plastic film has a large deformation space, unlike steel shell aluminum shell batteries that will explode when thermally out of control; the shell is a layer of aluminum plastic film, which is light in weight and inactive Part of the proportion is small, the weight of the soft pack battery is 40% lighter than the steel shell lithium battery of the same capacity, and 20% lighter than the aluminum shell battery; the capacity of the soft pack battery is larger than that of the steel shell battery of the same size. The capacity is 10-15% higher, which is 5-10% higher than the aluminum shell battery; the shell strength is low, and the mechanical stress generated on the internal structure during the cycle is small, which is beneficial to the cycle life (of course, no additional Under stress conditions); the position of the tabs is sufficient, and the heat is evenly distributed during the charging and discharging process. The disadvantages of soft-packed polymer lithium batteries: low shell strength and strong dependence on group technology; compared with winding production methods, the production efficiency of laminated sheets is relatively low. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete it.