In order to carry out the optimization of the performance of lithium batteries, to improve its energy density is an important key engineering design tasks.lithium ion battery VS lead acid battery World Energy and lithium battery manufacturers point out that to improve the energy density of battery management system can start from a number of different aspects, including product development of new materials, optimization of the battery industry structure technology, and by improving the manufacturing process.

1. Enhanced lithium cell materials

Specific energy can be changed through the use of different organic chemicals management system. For example, in lithium-ion battery cathode materials, the ratio of nickel, cobalt and manganese can be adjusted to increase the content of nickel, thereby increasing the specific energy of lithium-ion batteries. Silicon-carbon polymer materials are available in volumes up to Mach 4200, whereas the basic theoretical capacity of lithium-ion batteries is only Mach 372. In addition, many lithium-ion batteries have impaired capacity on a single charge, and some lithium-ion batteries are impaired throughout the charging process. Filling lithium into lithium-ion batteries or lithium-ion battery electrolytes is also an important part of new battery research.

2. Optimize the arrangement structure

Currently, most battery packs utilize a variety of structural methods to secure the retention cards and support elements in the battery pack. Many of the structural elements are large in size and mass, which greatly reduces the efficiency of the overall integration.lithium battery vs lead acid By adjusting the arrangement structure of the battery pack and simplifying the structure of the various mounting support points, it is possible to make lithium-ion battery packs have a high volume utilization in a relatively limited interior space. This year's CTP (Cell to Pack) program changes the structure of past lithium-ion touch battery packs by forming a standardized battery pack from several lithium-ion battery packs in a large space, which are then intelligently stacked to form a larger battery control module. These schemes not only reduce the number of components, but also greatly improve space utilization and specific energy. Therefore, simplify the structure of the rechargeable battery and form a secondary integration program for lithium-ion batteries has become the technology direction chosen by many companies.

3. Change the specifications of a rechargeable metal battery

Changing the specifications of a rechargeable battery is also an important aspect of expanding energy density. For example, changing the length and width of the battery can make the lithium-ion battery flatter and narrower within a certain volume, which facilitates the overall layout of the lithium-ion cells in the battery pack, and also improves the spatial efficiency of the power lithium-ion batteries and produces battery packs with greater specific energy. The scheme also allows the lithium-ion core to have a larger total heat dissipation area, permitting the lithium-ion core to immediately transfer internally generated heat to the outside world, preventing internally generated heat from accumulating and better matching the higher specific energy. Therefore, how to improve the specific energy of the battery according to the changes in battery specifications is also a major part of our research.

4. Application of lightweight raw materials

In the application of raw materials, in addition to the upgrading and development of materials as lithium-ion power batteries, the improvement of battery pack materials is also an important technical measure for companies to improve their energy and rechargeable battery management system design ratio. At present, the battery box materials are mostly aluminum alloy building materials, high-strength steel materials and polymer composite materials. Aluminum alloy profile of the relative value of the density of the impact is small, only one-third of China's steel, the use of aluminum alloy profiles instead of steel market can get a significant level of reduction in the weight of the battery. Aluminum alloy profiles will also lead to produce a layer of high-density, stable oxidized environmental air film, corrosion resistance, is a kind of education high-quality battery lightweight raw materials; high-strength steel, high-strength steel rechargeable battery shell can be selected lighter, and for the cost is also lower than the traditional high-carbon steel raw materials; thermoplastic polymer materials we can not appear to repeat the use of the students, but the cost is low, ductility is good, it is ideal! The battery shell raw materials, has been widely studied and applied to battery packs.