Charging and maintenance of lithium batteries for electric vehicles

Lithium-ion batteries have different charging and discharging characteristics and performance parameters than nickel-metal hydride batteries. The use and maintenance of power lithium batteries for electric bicycles are not much different from those of ordinary lithium batteries. The following is how to better use power lithium batteries.

1. Timeliness of charging: (1) Battery is usually half - charged when it leaves the factory. When riding for the first time, it is best to fill the battery, one will reduce the charge of the lithium battery due to self-discharge, and the other will activate the active substance. (2) Do not exhaust the battery every time you ride, because over-discharge is very harmful to the lithium battery. Long-term over-discharge will reduce battery life by a factor of three. At the very least, when there is a low battery warning in the electric vehicle riding, stop the ride decisively and charge the lithium battery.

2. The timeliness of charging: (1) Lithium battery is effective at any time, even if there is 50% of electricity before charging, it does not matter, because it is different from nickel-metal hydride battery, the latter has memory effect Lithium battery does not. (2) Do not overcharge, when the charging completion indicator is on, stop charging.

3. Make up the self-discharge charging: If you do not use the battery for a long time, you must charge it once in 60~90 days, because the optimal storage state of the lithium battery is semi-electric storage (that is, 40%~60% of the nominal capacity of the battery) Between storage), we know that the maximum voltage of the lithium battery is 4.2V, therefore, the storage voltage is preferably between 3.8V and 3.9V, and the capacity is basically half.

4. The original charging equipment: try to use the original lithium battery charger charging, the original charger supporting performance, the charging rate is moderate, there are some fast charging piles, it is recommended not to use more, use the last time, twice in the year There is no excuses. Excessive current charging also has a greater damage to the internal structure of the battery.

5. The temperature environment during storage: Lithium battery temperature environment is wide, -20 ° C ~ 45 ° C, but in fact the most suitable temperature is room temperature. From the perspective of “aging”, temperature may be the main reason for the gradual decline in lithium battery capacity. For countries with large temperature differences in China, the northern region should develop low-temperature lithium batteries , while the southern region should develop high-temperature lithium batteries .

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