How To Recognize If A Lithium Battery Has Protection Plate?

The application of lithium batteries is becoming more and more widespread, and now almost every industry needs lithium batteries. Because lithium batteries are so widely used, people are also paying more and more attention to the safety of lithium batteries themselves, so the safety protection plate of lithium batteries has become very important.

The role of lithium battery protection plate we all know, the most basic three points: anti-overcharge, anti-over-discharge and prevent the harm caused by short circuit. But there are a large number of unscrupulous manufacturers on the market, lithium batteries itself is used by the second-hand battery cells, the lithium battery protection plate process and its substandard. There are even some lithium battery manufacturers in order to save costs, did not join the lithium battery protection plate itself. Such batteries into the market, although the price is very low, but the potential danger is great. Therefore, we advise you not to buy these poor quality lithium batteries for the sake of cheap. Then there are friends will ask, how to know whether they buy lithium batteries with lithium battery protection plate?

First of all, let's take 18650 as an example, from the name we can know that the height of the battery's cell is 65mm, so in terms of this, the height after adding the protection plate should be between 68mm and 72mm, so we can visually inspect the height and roughly identify it.

Secondly, we will buy back the lithium battery for discharge, if the battery to 2.3V stops discharging, then it shows that the lithium battery in the lithium battery protection plate plays a role, if to 2.3V still continue to discharge, we immediately manually disconnect its charging, first of all, the battery should not have a protection plate, and secondly, as mentioned above, immediately disconnecting the battery output is also designed to prevent lithium battery over-discharge.

The last way that is to judge by the temperature. If we use lithium batteries on the way to find that the battery itself temperature rises, it is likely to be caused by the positive and negative short circuit, if there is a lithium battery protection board, if a positive and negative short circuit occurs, the protection board will understand the power cut, so there will be no heating this phenomenon exists, on the contrary, if there is no lithium battery protection board, then the battery will not be normal heat.

Therefore, if you find any abnormality when using lithium batteries, disconnect the power supply first to avoid accidents.