Electric vehicle lithium-ion batteries are divided into different types, generally lithium-ion iron phosphate batteries and ternary lithium-ion batteries, the former for slow charging, the latter for fast charging, depending on the manufacturer's charging strategy for lithium-ion batteries, will be set up inside their chargers, can not be changed. Each lithium-ion battery manufacturer will configure the slow-charging and fast-charging ports according to the characteristics of the lithium-ion battery, and the BMS system will unify the management of the charging process, as long as the charging is safe according to the manufacturer's requirements.
In general, electric car lithium-ion batteries outside is not available for fast charging. Usually will not match the fast charging, unless the charging station has the relevant model fast charging adaptation standards, these fast charging protocol standards are usually set by the electric vehicle manufacturers factory, through the agreement to calibrate the charging source to meet the charging standards of lithium batteries. At present, in the vast majority of cases, only the original charging post can be used for fast charging, and of course there are charging stations that can also be adapted for fast charging. But very few of them.
Electric vehicle lithium-ion battery fast charging saves charging time, but also has a certain impact on the lithium-ion battery itself. Lithium batteries are not actually suitable for fast charging, fast charging will accelerate the polarization phenomenon of lithium wear, thus affecting the battery performance.
Due to the polarization phenomenon in the battery, the maximum charge current it can accept will be reduced with the addition of charge and discharge cycles. Lithium-ion battery manufacturers analyze that a series of problems such as the reaction decomposition of electrolyte, gas production, etc., the risk factor is suddenly added, the impact on the safety of lithium-ion batteries.
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