How to identify whether a lithium-ion battery has a lithium-ion battery protection board?

Everyone knows the effects of lithium-ion battery manufacturers' protection boards. The three most basic points are: prevention of overcharge, prevention of overdischarge and prevention of damage caused by short-circuit failure. However, at this stage, there are also a large number of black heart processing manufacturers on the market. The lithium iron phosphate battery itself uses second-hand lithium ion batteries, and the production process of the protection board of the lithium ion battery manufacturer is also unqualified. Even some lithium-ion battery processors do not add lithium-ion battery protection plates to the lithium-ion battery itself in order to better save costs. Such a flow of rechargeable batteries into the sales market, although the price is very low, but the potential risks that arise are very large. There is no need to buy such fake and inferior lithium iron phosphate batteries in order to be more greedy for cheap. Then some friends will ask, how do you judge whether the lithium iron phosphate battery you bought contains a lithium iron phosphate battery protection board? Today, the square high-tech technology will accompany you to identify whether the lithium-ion battery contains a lithium-ion battery protection board. First of all, we take 18650 as an example. From the name, we can know that the aspect ratio of the lithium-ion cell of the rechargeable battery is 65mm. Therefore, at this point, the aspect ratio after adding the lithium-ion battery protection board should be 68mm to 72mm. In the middle, so we can estimate the aspect ratio and roughly identify it. Secondly, everyone will charge and discharge the lithium-ion battery manufacturers that they bought back. If the rechargeable battery reaches 2.3V and terminates the charge and discharge, then it indicates that the lithium-ion battery manufacturer's protection board in the lithium iron phosphate battery is fully functional. If it is still charging and discharging again at 2.3V, everyone will immediately cut off the battery for charging. First, the rechargeable battery should be without a rain shield. Secondly, the output of the rechargeable battery mentioned above should be cut off immediately for more Prevent the power loss of lithium-ion battery manufacturers. The use of lithium-ion battery manufacturers is becoming more and more common, ranging from mobile phones to pure electric vehicles. At this stage, the final method is to distinguish based on temperature. If we find that the temperature of the rechargeable battery rises during the application of the lithium iron phosphate battery, it is likely to be caused by the positive and negative short circuit failure. If there is a protection board from the lithium ion battery manufacturer, if the positive and negative short circuit failure occurs, the lithium iron phosphate battery The protection board will know that the power is turned off, so it is not easy to be hot. On the contrary, if there is no lithium-ion battery manufacturer's protection board, the rechargeable battery will be abnormally hot. Above is the information content of the square high-tech analysis for everyone in detail today. Therefore, if an abnormal condition is found during the application of the lithium iron phosphate battery, the switching power supply should be cut off to prevent accidents. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Temperature analysis of low temperature performance of 18650 lithium ion battery