What purpose does the protection board play in the AGV lithium battery?

What is the use of shielding in AGV lithium batteries? We all know that a product of AGV lithium batteries is not only composed of batteries, in addition to some basic components, the most important thing is the lithium battery maintenance board. This is a maintenance function part, so what kind of maintenance is it? We said before that the AGV lithium battery exploded and caught fire, all due to battery overcharge, over discharge, over current, short circuit, etc., but the lithium battery maintenance board is In order to prevent these problems from happening. To prevent overcharging, when the charging is overcurrent, the voltage will reach the highest voltage, and the maintenance board will actively stop charging. To prevent over-discharge, when the battery is about to run out, the voltage will also reach the lowest level, the maintenance board will no longer shut down and discharge, and the device will also actively shut down. To prevent over-current, different products use different voltages. When the products use different voltages, the maintenance board will be closed. To prevent short circuits, when the lithium battery is short-circuited, the repair board will be closed in an instant and will no longer be energized, so that accidents will not occur. First of all, it is necessary to solve the problems caused by external factors such as human error or damage during the blasting of the AGV lithium battery. The important issue is the quality of the battery itself. Lithium battery is the most critical core of the entire battery, and its burst is because of it. Therefore, we can divide into three types of cell blasting: internal short circuit, external short circuit and overshoot. The internal short circuit is mainly caused by some metal burrs inside the battery piercing the diaphragm, which may cause a small short circuit. But because these burrs also have a certain resistance value, and are very small and easy to burn, they will return to normal in a short time, and the probability of explosion is not very small. External short circuit refers to a short circuit outside the battery, which is caused by the poor insulation design of the lithium battery. When a short circuit occurs, the electronic components cannot block the circuit, causing the internal temperature of the battery to rise. The electrolyte gasified and expanded and broke the outer shell of the lithium battery pack. The high temperature of the battery causes the data to burn and explode. In fact, overcharge is also the cause of internal short circuit, because the battery after overcharge is full of metal burrs, and there are micro short circuits everywhere, which will cause an explosion. Among these factors, there are our own reasons, and there are also manufacturers and manufacturers' problems. Therefore, we must use AGV lithium battery equipment safely and reasonably, and do not buy inferior products. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Knowledge of lithium battery type and capacity selection