Soft pack battery-the most suitable technical route for power battery?

　　With the continuous improvement of energy density requirements, various manufacturers are working hard to improve the parameters of their own products, mainly along two and a half lines: one is to step up the development of high specific energy cathode materials, and the other is to increase the capacity of battery cells. , To reduce the proportion of auxiliary structures such as the shell in the monomer.

　　With the continuous improvement of energy density requirements, various manufacturers are working hard to improve the parameters of their own products, mainly along two and a half lines: one is to step up the development of high specific energy cathode materials, and the other is to increase the capacity of battery cells. , To reduce the proportion of auxiliary structures such as the shell in the monomer. The other half is considering the transformation of soft-pack batteries, which can be seen from the current mainstream battery factories actively undertaking national scientific research projects in the direction of soft-pack batteries. Is the soft pack battery the most suitable technology route for power batteries? Today, the editor organizes some contents of the soft pack battery and predicts the future technical route of the power battery together.webcam factory

　　The basic structure of the soft pack battery

　　The pressure of the soft pack lithium battery module

　　The soft-packed lithium-ion battery module generally adopts a stacked method to form the module, in which a certain force is applied to the stacked battery to compress it, and its function is mainly to restrain the battery. If the pressure is too small, the battery will be easily damaged when it vibrates with the vehicle body; if the pressure is too large, it will have a negative impact on the life of the battery. Therefore, when designing the structure of the soft-packed lithium-ion battery module, it is necessary to consider applying an appropriate pressure to the battery. The small stacking pressure can prevent the layers from separating, which is beneficial to the long-term battery life. However, due to the loss of circulating lithium ions, greater pressure results in a greater capacity decay rate. In addition, stacking pressure can also cause local deformation and chemical degradation of the diaphragm. When the battery capacity changes from 0 to 100%, the thickness of the lithium battery will increase by about 1.2%. From these research results, the external pressure of the lithium battery has a significant impact on the performance of the battery, which must be considered when designing the structure of the lithium battery module.