What is the function of the lithium battery protection board?

The reason why the lithium-ion battery pack needs a protective plate is due to its own characteristics. The internal reaction of the lithium-ion battery is not stable, which makes the battery have the potential of explosion and fire. This dangerous accident happens precisely because of the overcharge and over discharge of the battery. Therefore, there will be a lithium-ion battery protective plate in each lithium-ion battery module. What are the functions of the lithium-ion battery protection board? How to better protect customized lithium-ion batteries?

The customization of lithium ion battery has two important parts: the lithium ion battery cell and the protection board. If the lithium ion battery cell is the "heart" of the battery, then the protection board is to protect various antibody organs of the heart. A safe and reliable lithium battery pack must be equipped with the protection board component. When the overcharge voltage of the customized lithium-ion battery cell is higher than 4.2V, it will start to have side uses. The higher the overcharge voltage, the higher the risk.

1. As the most important function in lithium ion battery customization, the protection board is the charge and discharge protection of series or parallel lithium ion battery packs. When fully charged, it can ensure that the voltage value between each single battery in the battery pack is consistent and that each single battery is fully charged. In addition, the protection board also detects the over-current, short circuit, over temperature, over-voltage and other states of the lithium-ion battery to protect the battery, and protect the battery against no discharge, no charge, no current, and short circuit. Short circuit of lithium-ion battery has a great risk factor. Short circuit will cause the battery to have a large current, but also a large amount of heat, which will seriously damage the service life of the battery. More seriously, the heat will cause the battery to burn and explode. The purpose of customized protection board for lithium ion battery is that when high current occurs, the protection board will be turned off instantly, so that there is no power or heat in the battery.

2. Overcharge protection: The voltage of the lithium ion battery will also increase with the increase of the charging capacity. When the battery voltage exceeds the threshold value of the overcharge voltage of the protection plate, the protection plate will make the battery power off and no longer charge; Overdischarge protection: the voltage decreases with the decrease of the discharge capacity of the lithium ion battery. When the battery voltage drops to the threshold value of the over discharge voltage of the protection board, the protection board will shut down the battery and stop discharging.

3. The lithium-ion battery protection board also has the functions of power detection, margin display, battery working status display, communication remote control, etc; In addition, the functions of equalization, temperature control and soft switch can be selected.

Generally, in a customized lithium-ion battery pack, in addition to the customized lithium-ion battery cell, there will be a protective plate, which is important to provide the three protections. However, the three protections of the protective plate are obviously not enough. The global explosion of lithium-ion batteries is still frequent. To ensure the stability of the battery system, a more careful analysis of the causes of the battery explosion is required, In this way, the lithium ion battery can be better protected to play its role.

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