From the "big" and "small" of power battery diaphragm technology, what are the applications of lithium-ion batteries?

　　The technological development of lithium battery separators is advancing with changes in the application of lithium-ion batteries. At present, the prominent feature is the development trend of terminalization of lithium batteries becoming smaller and lithium batteries becoming larger.

　　The technological development of lithium battery separators is advancing with the changes in the application of lithium-ion batteries. The current outstanding feature is the development trend of lithium batteries becoming smaller and larger and lithium batteries growing.

　　China's lithium battery industry is in the ascendant. Under the encouragement of national policies, the existing capacity expansion and potential capacity development are doubling year by year. As the most profitable separator of lithium-ion battery inner components, it is the first to develop.

　　The main performance requirements of current lithium battery separators include: thickness uniformity, mechanical properties (including tensile strength and puncture resistance), air permeability, physical and chemical properties (including wettability, chemical stability, thermal stability, safety), etc. Four major performance indicators.

　　The technological development of lithium battery separators is advancing with the changes in the application of lithium-ion batteries. The current outstanding feature is the development trend of lithium batteries becoming smaller and larger and lithium batteries growing.

　　See from the "small" place

　　is mainly reflected in lithium batteries for portable electronic consumer products, such as mobile phones, digital cameras, electronic dictionaries, etc. The high energy density requirements of the aesthetics and miniaturization of lithium battery designs have prompted the thinner and thinner separators for such lithium battery applications. Because the meaning of high energy density is to accommodate more electrode materials in a small volume, under the condition that the positive and negative materials have been determined, the performance of the separator becomes inevitable. This requires that the separator be thinner to maintain the original Some battery capacity and cycle life.

　　see from the "big" place

　　is mainly reflected in the lithium power batteries used in electric bicycles and electric vehicles. It is not difficult to see through the spontaneous combustion incidents of electric vehicles exposed in China that safety performance is currently the bottleneck restricting power lithium batteries. The main reasons for this are manifested in these three aspects:

　　1. Safety is the core of the physical and chemical properties of lithium-ion battery separators. Any defect in the other three properties may lead to unstable safety performance;

　　2. The larger the capacity of the power lithium battery cell itself, the fewer the number of cells that need to be connected in series. This objectively requires the power lithium battery to use a cell with a larger capacity. Performance indicators need more delicate craftsmanship to ensure;

　　3. Due to the consistency of the series cells and the combination technology will bring safety hazards, this especially requires the manufacture of lithium battery separators to be more precise.

　　The excellent performance of lithium batteries and lithium battery packs cannot be completely counted on the diaphragms. The comprehensive matching of positive and negative electrodes and electrolyte components can achieve this goal. Lithium battery packs have more technical problems in combination. However, the importance of diaphragm technology as the most valuable lithium battery technology is self-evident.