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Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
Guizhou STD Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production & sale of lithium polymer batteries, drone battery, airplane batteries & battery pack etc.
release time:2023-08-08 Hits: Popular:AG11 battery
The diaphragm is located between the positive and negative poles, and its main function is to separate the active substances of the positive and negative poles, preventing short circuits between the two poles due to contact; In addition, during electrochemical reactions, the necessary electrolyte can be maintained to form channels for ion movement. The material of the separator is non-conductive, and different types of batteries use different separators. For lithium-ion batteries, as the electrolyte is an organic solvent system, the separator requires the following performance.
① In the battery system, its chemical stability is good, and the materials used are resistant to organic solvents.
② High mechanical strength and long service life.
③ The ionic conductivity of organic electrolytes is lower than that of aqueous solution systems. In order to reduce resistance, the electrode area must be as large as possible, so the membrane must be very thin.
④ When there is an abnormality in the battery system, the temperature rises. To prevent danger, at the beginning of rapid heat generation temperature (120-140 ℃), the thermoplastic membrane melts, the micropores close, and becomes an insulator, preventing electrolyte from passing through, thus achieving the purpose of interrupting current.
⑤ From the perspective of lithium batteries, they should be able to be fully immersed in organic electrolytes and maintain a high degree of immersion during repeated charging and discharging processes.
The commonly used separator material in batteries is usually a microporous membrane made of cellulose or woven fabric or synthetic resin. Lithium ion batteries generally use high-strength, thin-film polyolefin based porous membranes, commonly used membranes include polypropylene (PP) and polyethylene (PE) microporous membranes, as well as copolymers of propylene and ethylene, and polyethylene homopolymers.
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