Advantages of electric bicycle battery pack
Lithium battery has long service life, light weight and small volume
At present, the brands of lithium battery electric vehicles are diversified. The power performance of lithium battery electric bicycles is similar to that of lead-acid batteries. They can be charged for 6 ~ 8 hours. They can run 30 ~ 45 kilometers according to the battery capacity, and the weight is only about 1 / 5 of that of lead-acid batteries. The biggest advantage of lithium battery electric bicycles is long service life. The price of lithium batteries in the world is expensive only on the surface. In fact, careful calculation of the cost is similar to that of lead-acid batteries. At present, lithium batteries are generally guaranteed for 2 years and lead-acid batteries for 1 year.
Lithium battery has non activation characteristics
In the use of lithium batteries, it should be noted that after the battery is placed for a period of time, it will enter the sleep state. At this time, the capacity is lower than the normal value, and the service time will be shortened. However, the lithium battery is easy to activate. It can activate the battery and restore its normal capacity as long as it passes through 3-5 normal charge and discharge cycles. Due to the characteristics of lithium battery itself, it has almost no memory effect. Therefore, the user does not need special methods and equipment in the activation process of the new lithium battery.
Lithium battery with memory effect
When charging lead-acid batteries and nickel batteries, consumers have always worried about the memory effect of the battery. When using lithium batteries, everyone can breathe a sigh of relief. Lithium batteries do not have memory effect.
Battery pack maintenance of electric bicycle
The battery shall be recharged before initial use
The battery generally takes 1-2 months or even longer from delivery to use. During storage, the battery consumes part of the power due to spontaneous reactions such as self discharge in the battery, which can not reach the rated capacity. Therefore, it is best to supplement charging before initial use, so as to avoid customers mistaking it as insufficient capacity.
How to deal with batteries when electric vehicles are stored for a long time
Firstly, the battery should be fully charged and stored, and should be charged at least once a month to prevent power loss, which can effectively prevent irreversible salinization and crystal branch short circuit caused by crystal technology generation.
Is it better to charge the battery frequently or charge it after discharging
Because the deeper and shallower the discharge, the number of cycles will increase significantly. Therefore, according to this theory, frequent charging is beneficial to the cycle life. However, due to the influence of price factors and technical level, there are some defects such as high failure rate, poor reliability and low precision.
Therefore, sometimes frequent charging will affect the service life of the battery. When the battery is discharged and recharged, although the charging times are reduced, there will always be differences between individual batteries during discharge, which may lead to over discharge of some single cells, greatly reduce the charging acceptance capacity, resulting in insufficient charging. In addition, due to recharging after discharge, the charger has a long heavy load time and is easy to damage the charger.
Harm of overcharge and undercharge to battery
Overcharge means that the charging current of the battery is greater than the acceptable current of the battery. Overcharge is mainly the side reaction of electrolytic water. As the oxygen generated by the positive electrode of the battery is transferred to the negative electrode, oxygen compound reaction occurs and heat occurs. Therefore, the overcharge amount is actually converted into heat to increase the battery temperature. If it is not controlled, it will cause a large amount of water loss and deformation in serious cases.
Generally speaking, under charging means that if the battery is not fully charged, it is often under charged, and the pole will gradually form a kind of thick and hard lead sulfate, which is almost insoluble, that is, it will produce “irreversible sulfation”. The battery cannot be charged by ordinary methods, so the capacity will decay rapidly time by time.