What are the reasons why the lithium battery cannot be charged?

Lithium batteries can be divided into two categories, namely lithium metal batteries and lithium ion batteries. The charging method is basically CC/CV, which is also the conventional charging method for lithium batteries currently known. When the lithium battery cannot be charged, When the phenomenon occurs, it is nothing more than the following situations: 　　1) The lithium battery cannot be charged due to over-discharge. That is to say, the lithium battery is discharged very low, in a deep discharge state, and the power is basically used up, so low as the lithium battery The cut-off voltage can be activated at this time, but this is not necessarily effective; 　　 2) If the charger or charging circuit is faulty, first check if there is any problem with the charger. The method is very simple, directly measure the output voltage or observe the load of the corresponding voltage. That is, if there is a problem with the circuit, it will take a little effort. After all, it involves circuit hardware and other problems. If necessary, directly disassemble and analyze it; 　　 3) The lithium battery has been used for a long time, and the battery failure is more likely It’s small, but it can’t be ruled out. You should be familiar with your battery, and you should change the battery after you use it; 　　 4) There is a problem with the battery charging IC or BMS system. The battery management system has problems due to the imbalance of the battery cells. , Resulting in misjudgment by the management IC, which leads to failure to detect voltage or current. Or these chips fail to charge. Generally speaking, in this case, you first need to replace a protection board of the same specification to confirm whether the failure exists on the protection board. 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 article: How much do you know about the principle of lithium ion batteries?