Five ways to pick a good lithium-ion battery
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2020/12/18 12:04:53
With the rapid improvement of lithium battery technology, the cost of lithium battery continues to fall.The advantages of higher energy density, lighter mass, less pollution and longer service life make lithium batteries more and more concerned in the field of electric bicycles.
At present, the lithium battery of all sorts of brand on the market is mixed, stand or fall hard to distinguish.How to choose a new national standard special lithium battery, become dealers and consumers imminent matter!
1.Inspect appearance and packing
The quality of a battery can first be judged from its appearance and packaging. A product that does not do well even in the details of packaging is certainly not a professional product.The appearance can help us to screen out some inferior products.
2. Compare weights
The weight of lithium batteries is directly proportional to the capacity. If the weight difference is too large for polymer lithium batteries, the capacity will definitely be insufficient. However, there are differences in the capacity of some batteries.In addition, you can also sense from the packaging whether the weight of the battery is heavy, if heavy people prefer high quality lithium batteries.
3.Test internal resistance and maximum current
In fact, the fastest test method to judge the performance of lithium batteries is to test the internal resistance and the maximum discharge current.Good quality lithium batteries, very small internal resistance, the maximum discharge current is large.The multimeter with a range of 20A is directly connected to the two electrodes of the lithium battery. The current should be about 10A or even higher. Moreover, it can be maintained for a period of time.
4. Detection of live work
In the electrified working process of lithium battery, if the battery poles are not hot for about 10 minutes after continuous discharge, it proves that the battery protection plate system is perfect. Generally, the quality of lithium battery with high quality protection plate is better than ordinary lithium battery.
5. look at the cell
The most important component of a battery is undoubtedly its cell.At present, most of the batteries used in the market are soft-pack cells and 18650 cells, which are also relatively common materials for lithium battery pack cells.First check whether the cell is brand new, because there are some bad small workshops on the market using second-hand cell to make lithium batteries.Softpack lithium cell, also known as polymer cell, is a kind of flexible packaging electrolyte gel like battery, can be made into a variety of shapes, battery safety is high, will not explode.The current electric vehicle battery is basically 18650 cell, which is mainly made of lithium iron phosphate and lithium manganese acid and ternary materials.
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