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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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18650 li-ion battery

release time:2024-03-14 Hits: Popular:AG11 battery

　　How to repair the 18650 li-ion battery protection board?

　　1. No voltage or abnormal voltage

　　If there is no voltage or abnormal voltage, we should adjust the multimeter to DC 20 volts, then use the red meter pen to touch the positive electrode of the 18650 li-ion battery cell, and the black meter pen to touch the negative electrode of the battery cell. If the multimeter shows no voltage or the voltage is very low , it proves that the battery core is damaged.

　　2. No overcurrent protection

　　If there is no over-current protection, etc., first check whether the circuit of the over-current detection pin is defective. If so, replace the protection IC.

　　3. No resistance or excessive resistance

　　You need to find the cause from the identification circuit of the resistor pad, check whether the identification resistor is desoldered, whether the wrong resistor is pasted, whether there is a short circuit or open circuit, etc.

　　4. There is no internal resistance or the internal resistance is too large

　　1. If there is no internal resistance, you need to check whether the pins of the mos tube are damaged. If so, just replace the mos tube.

　　2. If the internal resistance is too large, use a probe to contact the electric fish 18650 li-ion battery protection board to detect whether there is poor contact or excessive oxidation. You also need to check whether there are too many nickel flakes on the battery core. If there are too many nickel flakes on the battery core, it will also cause excessive internal resistance.

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