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Sino Science&Technology Battery Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of Lifepo4 batteries,energy storage battery,portable UPS power supply,personalized customization lithium battery pack etc .
Environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery,3.7V lithium polymer battery, NiMH battery , NiCD battery ,Lead acid battery,dry cell battery ,alkaline battery ,heavy duty battery, button cell battery etc. we devote to R&D,innovation ,production & sales
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:2024-01-12 Hits: Popular:AG11 battery
The widely used positive electrode material for lithium-ion batteries is lithium cobalt oxide. The theoretical capacity of lithium cobalt oxide is 270mAh/g, but in reality, it can only exert a capacity of 135-140mAh/g. Excessive use will damage its material structure. If certain accidents occur, such as damage to the management system causing the charging voltage of the battery to be too high, the remaining lithium in the positive electrode will come out and deposit in the form of metallic lithium on the surface of the negative electrode through the electrolyte. The surface of metallic lithium is prone to the formation of "dendrites", which can puncture the insulation film, cause a short circuit between the positive and negative electrodes, and cause the battery to quickly heat up, leading to safety accidents. Overcharging the battery can also cause the positive electrode to accelerate the oxidation of the electrolyte at high voltage, resulting in thermal runaway of the battery due to the heat and gas generated. Overheating inside the battery can accelerate the reaction of lithium cobalt oxide. The internal temperature of the battery can instantly exceed 150 ℃, the separator is melted, the positive and negative poles are directly short circuited, and the battery burns and explodes. If other metal impurities are mixed in during the battery production process, it is also easy to cause local overheating of the battery during charging and discharging, thereby causing safety issues.
Although lithium-ion batteries have safety issues, there are currently no other types of batteries that can replace them due to their inherent performance. Major lithium-ion battery companies have also strengthened their control over safety, mainly focusing on the following areas: replacing lithium cobalt oxide with new positive electrode materials in areas with high safety requirements (such as lithium manganese oxide, lithium iron phosphate, ternary systems, etc.)
To make our lithium batteries safer, we need to do the following:
1. Adopting stricter methods to control the production environment and product quality;
2. Develop more detailed and strict industry and enterprise standards;
3. Develop new electrolyte additives, separators, negative electrode materials, etc;
4. Strengthen the control of the battery protection system to prevent overcharging of the battery.
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