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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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How to set the ratio of positive and negative electrodes for lithium batteries?AG10 battery

release time:2023-08-24 Hits: Popular:AG11 battery

　　The so-called ratio of positive and negative electrodes in lithium batteries, to put it bluntly, means how much excess is needed for the negative electrode to be suitable; Excessive consumption can cause waste of the negative electrode, but it can improve the capacity of the positive electrode (i.e. high capacity); If there is too much or less, there is a risk of lithium precipitation, which makes it difficult to fully utilize the positive electrode capacity (i.e. low capacity).

　　CB value: also abbreviated as Ce11Balance in English.

　　The calculation method is as follows: CB=negative electrode capacity per unit area/positive electrode capacity per unit area. Under normal circumstances, the CB value is determined by the following conditions:

　　1. The first efficiency of active materials;

　　2. Coating accuracy;

　　3. The decay rate of the positive and negative pole cycle (requires some experience).

　　If the coating accuracy can reach 100% and the first efficiency of the positive electrode is greater than the first efficiency of the negative electrode, then the CB value can theoretically approach 1. However, considering that the attenuation of the negative electrode is generally greater than that of the positive electrode, it is still necessary to increase the CB value.

　　Positive electrode material: Taking lithium borate as an example, the designed capacity is 140mAh/g (the initial efficiency of lithium borate is generally 95%); Negative electrode material: artificial graphite, designed with a capacity of 340mAh/g (the first efficiency of artificial graphite is generally 90%); Coating accuracy: Assuming a coating accuracy deviation of 2.5%;

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