Lithium battery sorting machine is closely related to lithium batteries, which plays a very important role. First of all, in our daily life, we often need to use lithium battery products. For example, the lithium battery electric bicycle that we often use at work is a good example, in which the lithium battery automatic bicycle accounts for 70% of the daily traffic work. A whole battery pack provides power and energy in a lithium battery bicycle. Secondly, how to determine that the whole battery pack is complete, unified and safe? This is the role of lithium battery sorter. The sorter obtains the data of each cell through internal resistance, voltage and internal pressure, so as to achieve the data of each cell. Only in this way can the lithium battery pack produced be safe and durable.

Internal resistance test of lithium battery: it refers to the resistance of current flowing through the battery when the battery is working. It is generally divided into AC internal resistance and DC internal resistance. Because the internal resistance of rechargeable battery is very small, when measuring DC internal resistance, the polarization internal resistance is generated due to the polarization of electrode capacity, so its real value can not be measured. However, measuring AC internal resistance can avoid the influence of polarization internal resistance and obtain the real internal value.

Test lithium battery voltage: refers to the potential difference between the positive and negative poles of the battery when the lithium battery is connected to the load, that is, when there is current flowing through the circuit, also known as discharge voltage. Because of the existence of ohmic resistance and polarization overpotential, the working voltage of lithium battery is lower than the open circuit voltage.

Testing the internal pressure of lithium battery: it refers to the pressure formed by the gas generated during the charging and discharging process of lithium battery, which is mainly affected by the battery material manufacturing process, structure and other use process factors. Generally, the internal pressure of the battery is maintained at a normal level, and the internal pressure of the battery may rise in the case of overcharge or overdischarge.

In short, the lithium battery sorter is a part of the lithium battery assembly equipment to inspect the lithium battery. Its steps are to ensure that each cell has the same value. In this way, the lithium batteries with the same value are welded into a lithium battery pack. After installing the protection plate, it is basically a finished product, which can be directly installed on the electric bicycle.