Causes of lithium battery accidents and correct use methods

1. Internal short circuit (mostly soft package large monomer): structure or process defects lead to the insertion of the tabs, the surplus of the diaphragm is too small, burrs, and the diaphragm is discounted. In the current structure of thick battery and internal parallel connection, the lug insertion is often not in place. The addition of a protective plate in the subsequent finished product or the use process may easily cause an internal acute short circuit and cause combustion or explosion (internal short circuit: this is personally I have a deep understanding. At that time, more than 2K batteries of this kind were scrapped. The actual nature of the design defect was an acute internal short circuit. However, this situation is almost rare now, unless external forces are involved. 2. External short circuit: The explosion after burning caused by the external short circuit of the battery below 1AH is rare. It is usually caused by bulging or simply burning the tabs. The personal decomposition is caused by external short circuit of power lithium ion battery or large capacity mobile phone battery. Burning. This involves customers improperly installing the metal outer box without considering the insulation of the tabs, and abnormal smoke and combustion of the battery occurs at the installation site; the power lithium-ion battery is also often lack of structural fixing measures (not considered properly), and the battery pack is used during the user’s use. Shaking may cause damage to the battery's external insulating protective film or damage to the connecting wire, which will eventually cause short-circuit and burn. 3. Overcharge explosion: This is the most dangerous and the one that the company fears most, but it still happens occasionally. From what we know, there are two points: a. The user does not use the matching charger as required, which destroys the protection circuit and the user often charges for an unlimited time. In this case, it is difficult to not explode; b. Unreasonable and the protection board fails, in this case it will be a mess... the same is true for single-cell batteries. 4. The material of the battery is not good enough. If the material is not off, it may overheat under the calibrated voltage and current, which may cause an accident. Based on the above decomposition, if you can use lithium batteries correctly and be as alert as possible to the occurrence of the above situations, you can sort out some methods: 1. Frequent deep charging and discharging: Lithium batteries have almost no memory. Many friends are using lithium batteries or lithium batteries. In the case of digital products, I like to use the power to a point (protected by the protective plate) and then recharge it. In the eyes of many people, this is also a way to activate the battery. In the use of lithium batteries, we call the state of recharging after running out of power as deep charging and discharging. In fact, deep charge and discharge is a major misunderstanding of many people when using lithium batteries. Scientists have concluded through experiments that the number of deep charge and discharge is directly proportional to the battery life under other environmental conditions. Will cause the battery life to end prematurely. Lithium batteries with a long service life can easily cause battery swelling and other situations, which can cause an explosion. 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: What are the principles and methods of 18650 lithium battery repair