How to judge whether the lithium battery protection board is used in the lithium battery?

by:CTECHi     2021-07-17

In the development of informatization today, the application of lithium batteries is becoming more and more extensive, ranging from mobile phones to electric vehicles, and it can even be said that they are used everywhere and all the time. At present, almost all industries have lithium batteries. The 'footprint' of the battery. It is precisely because the application of lithium batteries is so extensive that people are paying more and more attention to the safety of lithium batteries themselves, so lithium battery protection boards have become important. What is its importance? What important role does it play in lithium batteries? The following Chinese people create and discuss its mystery with everyone.

Lithium battery protection board, as its name implies, is a circuit board that protects the battery, but what protection function does it have? The three most basic points: prevent overcharge, prevent overdischarge, and prevent the harm caused by short circuit. Then some people will ask, the role of lithium battery protection board is so great, how can you know whether the lithium battery you buy contains What about the lithium battery protection board? Today, Guoren Chuangfa will show you how to judge whether the lithium battery protection board is used in the lithium battery?

Before learning, Chinese Chuangfa warmly reminds everyone that there are also a large number of unscrupulous manufacturers on the market. The lithium battery itself uses second-hand batteries. The craftsmanship of the lithium battery protection board is also extremely substandard. In order to save costs, some lithium battery manufacturers even did not add a protective board to the lithium battery itself. This kind of battery flow into the market, although the price is very low, but the potential danger it brings is great. Therefore, I hereby advise everyone not to buy these low-quality lithium batteries for the sake of cheapness. Safety is the most important thing. Now we come to learn how to judge whether the lithium battery protection board is used in the lithium battery?

First, we take 18650 as an example. From the name, we can know that the height of the battery cell is 65 mm. So in this regard, the height after adding the protective plate should be 68 mm to 72 mm. Time, so we can visually check the height and roughly distinguish it.

Secondly, we will discharge the lithium battery we bought. If the battery reaches 2.3V, it will stop discharging, then the lithium battery protection board in the lithium battery has played a role. To continue discharging, we will manually disconnect the charging immediately. From this we can judge that the battery should not have the protective plate. The immediate disconnection of the battery output mentioned above is also to prevent the over-discharge of the lithium battery.

The last way is to judge by temperature. If we find that the temperature of the battery itself rises while using the lithium battery, it may be caused by the short circuit of the positive and negative electrodes. If there is a lithium battery protection board If there is a short circuit between the positive and negative poles, the protection board will be cut off immediately, so there will be no heat generation. On the contrary, if there is no lithium battery protection board, the battery will heat up abnormally.

The above is the knowledge that Guoren Chuangfa Technology Co., Ltd. learned with everyone today, so if you find an abnormal phenomenon while using the lithium battery, please disconnect the power first to avoid accidents.

For the promotion of lithium battery industry chain enterprises, the lithium grid (li-b.cn) welcomes contributions. share to:
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