whether the lithium battery has PCB?
Lithium batteries are increasingly widely used, from small cell phones to electric cars, at present, almost all walks of life have lithium battery “footprint”. It is because the application of lithium batteries so widely, so people are also paying more attention to the safety of lithium batteries themselves, so lithium battery PCB becomes important.
The most basic three protection points of lithium battery PCB are: 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, they made lithium batteries with second-hand cells, the process of lithium battery PCB is not up to standard. There are even some lithium battery manufacturers in order to save costs, there is no lithium battery PCB of their products. This battery flow into the market, although the price is very low, but the potential danger is very big. Therefore, here we advise you not to buy these poor quality lithium batteries for cheap. Then someone will ask, how to know whether the lithium batteries has PCB?
First of all, we take 18650 as an example, from the name we can know that the battery cell height is 65 mm, so on this point, after adding the PCB height should be 68 mm to 72 mm, so we can visually inspect the height, roughly to identify.
Secondly, we will buy back the lithium battery for discharge, if the battery to 2.3V stops discharging, then the lithium battery PCB in the lithium battery plays a role, if to 2.3V still continue to discharge, we immediately disconnect it manually. First of all, the battery doesn’t have PCB inside, and secondly, immediately disconnect the battery is also designed to prevent lithium batteries from over-discharging.
The last way that is to judge by the temperature. If we use lithium batteries on the way to find that the battery temperature rises, it is likely to be caused by the positive and negative short circuit. if there is a lithium battery PCB, if a positive and negative short circuit occurs, the PCB will understand and cut the power supply, so there will be no heating phenomenon exists, on the contrary, if there is no lithium battery PCB , then the battery will be heating abnormally.
On the way of using lithium batteries, if you find abnormal phenomena, first disconnect the power supply to avoid accidents.