How to judge the fault of lithium battery protection plate

 

Most people are not familiar with lithium batteries. Lithium batteries are actually used more frequently, but lithium batteries will also fail, and there are many reasons for its failure, Not only the circuit, but also the current resistance may be responsible for this, so if the lithium battery protection board fails, it must be judged according to the specific situation to find out its cause. Let's introduce how to judge the failure of the lithium battery protection board.

 

In fact, there are several reasons for the failure of the lithium battery protection board. The first is that the current is not displayed, and the output voltage is also unstable. Such a current cannot drive other batteries, so it will malfunction. The second reason is not charging, the third reason is no internal resistance, the fourth reason is large internal resistance, and the fifth reason is large resistance without resistance. These are some specific reasons, if you want to judge whether it appears Failure, you can start from these aspects, which is very convenient. It can be measured by a universal meter. This is a very accurate measurement method. Connect the relevant circuit through the universal meter, test the relevant voltage, compare it with the normal voltage, and judge whether there is a malfunction. This is an effective method. Also, measure the voltage of B- and the battery positive pole and P- and the battery positive pole by connecting the B-wire. If the voltage is the same as before, it means that the protection board is normal. If it is not the same, then It means that there are some faults, which all need to be accurately judged. The above are some measures to judge whether they are faulty.