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Strongly recommend the current development status of power tools lithium battery?

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Strongly recommend the current development status of power tools lithium battery?

Release date:2018-01-06 Author: Click:

Lithium-ion batteries, lithium-ion secondary batteries as a new type of high voltage, high energy density rechargeable batteries, its unique physical and electrochemical properties, has a wide range of applications. Its outstanding characteristics are: light weight, large energy storage, no pollution, no memory effect, long service life. With the same volume weight, Li-ion battery storage capacity is 1.5 times that of nickel-metal hydride battery, is 3 times that of nickel-cadmium battery, and its electric energy field has not yet been fully developed successfully, so its development prospect is very bright, It is the best battery that can be applied to electric vehicles at present.


The Lithium-ion batteries are becoming popular in the energy storage market. Lithium battery power tools used in secondary storage energy storage system forming a hot choice to replace lead-acid batteries, not only for electric vehicles, but also in solar energy, small energy storage devices and other equipment on the glory.


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Lithium-ion batteries can be classified into liquid lithium-ion battery (LIB) and polymer lithium-ion battery (LIP) according to the different electrolyte materials used. The positive and negative electrode materials used in the two are the same. The positive electrode materials include three types of lithium cobaltate, nickel cobalt manganese, and lithium iron phosphate materials, and the negative electrode is graphite. The working principle of the battery is also basically the same.


Their main difference lies in the difference of the electrolyte, in which the liquid lithium ion battery uses a liquid electrolyte, and the polymer lithium ion battery replaces a solid polymer electrolyte. This type of polymer can be either "dry" or "colloidal," and most currently use polymer colloidal electrolytes.


The life of a lithium battery pack is generally 300-500 charge cycles. Assume that one full discharge provides a quantity of electricity Q. If the reduction in quantity of electricity after each charging period is not considered, then lithium battery may provide or supplement 300Q-500Q of power in its lifetime. From this we know that if you use 1/2 to charge, you can charge 600-1000 times; if you use 1/3 to charge, you can charge 900-1500 times. And so on, if random charge, the number of uncertainties. In short, regardless of how the charge is made, the total supply of power to the 300Q-500Q is constant. Therefore, we can also understand this: Lithium battery life is related to the total charge of the battery, regardless of the number of charges. Deep-discharge deep charge and shallow shallow charge have little effect on the lifespan of lithium batteries.


The best maintenance method for lithium-ion batteries is to use lightly, fast-discharge and fast-charge. This is similar to the use of mechanical equipment. The higher the frequency and the higher the frequency, the faster the battery will be depleted. The smaller the degree of deep discharge of a lithium battery, the longer it will take, and if possible, try to avoid frequent full charge and discharge.

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