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SINO TECHNOLOGY

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 .

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SUNBEAM

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

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GREEN POWER

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

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DATAPOWER

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.

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SEONG-HEE

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

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STD

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.

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Sino Technology Manufacturer Group co.,ltd

18650 lithium battery 3000mah

Model No.: R6P

Voltage: 1.5V

Series: Carbon Zinc Dry Cell

Size: 50.5*14.5mm

Applications: Calculators / Children's Toys / Clocks&Watches etc

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　　The dismantling of the 18650 battery after the test showed that although the battery core was severely deformed, the positive and negative electrodes did not break, but a crack appeared in the diaphragm at a distance of 1.3 mm from the upper edge, which directly caused the battery to break. There was a short circuit, a sudden drop in voltage, and this crack was probably caused by the intrusion of the sharp edge of the metal foil. In addition, the thickness of the diaphragm has dropped greatly in some places, which is mainly caused by the depressed shell pressing the battery.

　　From the above analysis results, the possible reasons for the short circuit of the 18650 battery under axial pressure are mainly as follows.

　　1. The casing is in contact with the positive and negative electrodes through the ruptured diaphragm

　　2. The positive and negative electrodes are in contact through the ruptured separator

　　3. The positive and negative electrodes contact through the thinned area of the separator

　　4. The safety valve is squeezed and comes into contact with the cell