3. Coulomb counter: The coulomb counter is a current check resistor in the positive and negative poles of the lithium battery. When there is current flowing through the resistor, Vsense will appear, and the current flowing through the battery can be calculated by detecting Vsense. At present, in the battery market, the application of lithium iron phosphate batteries is more and more extensive. The density of lithium-ion batteries is high, 5 times that of lead-acid batteries. At the same time, the lifespan of lithium-ion batteries is greatly increased compared to lead-acid batteries. The number of charge and discharge of lithium-ion batteries is 1,000 times, which can theoretically be used for ten years. Lithium batteries are generally conventionally charged with "two-stage constant current charging". This method does not waste electricity, and the charging time is short, which is beneficial to prolong the service life of lithium-ion batteries. At the same time, it is much easier to calculate the capacity of lithium-ion batteries.
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