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Volumetric Properties Of Rechargeable Lithium Batteries
Oct 26, 2017

Lithium-ion battery is an ideal power source because of its high working voltage, small size, light weight, no memory effect, no pollution, small self-discharge and long cycle life. In practice, in order to obtain a higher discharge voltage, at least two monomer lithium-ion batteries are generally used in series to form lithium-ion battery packs.Rechargeable Lithium Batteries 

At present, lithium-ion battery pack has been widely used in many fields such as notebook computer, electric bicycle and standby power supply.Rechargeable Lithium Batteries

At present, the charge of lithium ion battery pack is generally used in series charging, which is mainly due to the simple structure, low cost and easy realization of the series charging method. But because of the monomer lithium ion battery between the capacity, internal resistance, attenuation characteristics, self-discharge and other performance differences, in the lithium-ion battery pack in series charging, the smallest capacity of the monomer lithium-ion battery will be full of electricity, and at this time, the other batteries are not full of electricity, if continued in series charge, The electrically charged monomer lithium-ion battery may be recharged.Rechargeable Lithium Batteries

and lithium-ion battery overcharge can seriously damage the performance of the battery, may even cause the explosion to cause staff injury, therefore, in order to prevent the emergence of lithium-ion batteries overcharge, lithium-ion battery pack is generally equipped with a battery management system, through the battery management system for each monomer lithium-ion battery to overcharge and other protection. In series charging, if there is a single lithium-ion battery voltage to overcharge protection voltage, the battery control system will be the entire series of charging circuit cut off, stop charging to prevent this single cell battery has been charged, and this will cause other lithium-ion batteries can not be full of electricity.Rechargeable Lithium Batteries

While some battery management systems have a balanced function, however, due to the cost, heat dissipation, reliability and other considerations, the battery control system of the equilibrium current is generally far less than the series charge current, so the balance effect is not very obvious, there will be some of the monomer batteries charged with the situation, which requires a large current charge lithium ion battery pack, For example, the lithium-ion battery pack for electric vehicles is more obvious.Rechargeable Lithium Batteries