How to identify whether the lithium battery has a protective plate

1) Look at the battery sleeve parameters: the battery sleeve has the words Protecetion of Over-charge as shown in the figure. When the manufacturer adds a protection board to the battery, it will generally indicate that the battery has a protection board. If there is ProtecetionofOver-charge... or overcharge/overdischarge protection on your battery sleeve, declare that the battery is equipped with a protective plate. 2) Use a caliper to measure the battery length. The length of the 18650 battery with a protective plate is generally greater than 65mm, as shown in the figure. The length of the 18650 lithium battery is 65mm, and the length of the plate is beyond this length, generally 69-71mm. (When using a metal caliper to measure the battery length, please put insulators such as paper on the positive and negative poles to avoid safety accidents) 3) Calculate the battery discharge rate In the previous small class, the author has already said that the power battery is to maintain high current The discharge is without a protective board. Everyone calculates the battery's discharge rate (discharge current/rated capacity u003d discharge rate) to determine whether the battery is equipped with a protective plate. Example of XTAR18650 battery For example, a 18650 battery with a rated capacity of 2600mAh and a continuous discharge current of 30A, then the discharge rate is about 11C, which is a power lithium-ion battery (discharge rate is about 10C and above), then we can judge whether the battery is without Protect the board. (Note: This method is mainly for power lithium-ion batteries) Small tips: Not all batteries on the market currently have a protection board, so users should choose to have a charging protection function (such as XTAR family chargers) when buying a charger. It can not only extend the battery life, but also effectively guard against charging risks. 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: Analysis of 18650 lithium battery pack process quality characteristics