18650锂离子电池爆炸的原因是是什么？

大家好，18650电池爆炸一直是大家担忧的问题，经过30年的发展，18650电池制备工艺已经非常成熟，除了性能有了极大提升之外，其安全性也非常完善。但是你们要知道很多实际上劣质电池和不合格电池才是这些事件的罪魁祸首。很多朋友认为那个金属壳的圆柱电芯18650锂离子电池爆炸的威力超乎你的想象。其实这种金属壳的锂离子18650电芯在正极那头有盖帽，盖帽都有泄气阀装置，没等里面的气体达到爆炸临界值的时候，就已经泄气了，安全阀是每一颗18650锂离子电池的标配，也是最重要的一道防爆屏障。。当然这个是品牌的哈。18650锂离子电池爆炸的原因是里面的电解液和微量的水分短时间受高温高压的作用产生膨胀后爆炸的，有了泄气阀，则这种条件不会产生。除非内部短路，能形成爆炸条件。

此前发生的移动电源爆炸事件，全部是因为无良厂家为节省成本使用不合格的劣质18650电池，甚至是二手废电引起的。目前各大品牌电池厂商生产的18650锂离子电池其实是非常安全的，而且18650电池使用率非常高，我们在日常使用时能够做到正确的使用以及避免电池短路，受损或温度过高，完全不用担心电池会爆炸。我们不能一竹竿打翻一船人，以个别劣质产品来定性18650锂离子电池的安全性。

我在东莞的鸿伟能公司做技术员，有时候也要测试锂电池的综合机械性能如何，如果测试的电池通过率达到标准就可以出货。做这些实验有一定的危险性，因为像重物锤击这类的实验，个别电池会爆炸，把钢壳完全炸开，不是把盖子顶开那种，是把钢壳炸成一个片。威力相当大，这种实验是在铁箱里面进行的，电池一爆炸，整个铁柜子都会震动并且摇晃一下，实验的柜子起码有百多斤，大家可想而知爆炸的威力有多大。

18650锂离子电池爆炸的原因还是蛮多的：

1.电池材料对锂电池的安全性影响，因为电池材料一般都具有热活性，当外部温度或者电池温度持续升高时，锂电池部就会进行许多热反应，如果温度不断上升，18650锂离子电池就有爆炸的可能性。所以锂电池正负极材料的选择对于电池安全性能具有重要影响。

2.生产中各个操作环节的品质控制也是影响电池安全性能的重要因素，正负极容量配比、浆料均匀度控制、正负极片毛刺、电芯卷绕时有短路为检测出来做到成品后电池电路等等。我们在用锂电池的时候，如果有过充或者外短路，内短路导致锂电池发烫，电池内部快速化学反应膨胀引起爆炸。

讲解了这么多，我们来总结一下:其实对于锂电池来讲，会出现爆炸原因也是可以理解的，毕竟在以前的时候，对于这种稳定性的把握不会那么厉害，但是18650作为一种性能对比性非常高的锂电池，其应用肯定会越来越广泛的，毕竟目前对于这种不可或缺的电池来讲，18650锂电池是最好的一个选择。

Everyone is good, 18650 battery explosion has been a concern for everyone, after 30 years of development, 18650 battery preparation technology has been very mature, in addition to the performance has been greatly improved, its safety is also very perfect. But you need to know that many of them are actually inferior batteries and substandard batteries. Many friends think that the cylindrical shell of the metal shell, the 18650 lithium ion battery explode more powerful than you think. In fact, the lithium ion 18650 core of this metal shell has a cap at the front of the positive pole, and the cap has the deflated valve device. When the gas inside the explosion reaches the critical value of the explosion, it is already deflated. The safety valve is the mark of each 18650 lithium ion battery, and it is also the most important explosion protection barrier. Of course, this is the brand of Kazakhstan. 18650 the reason for the explosion of lithium ion batteries is that the electrolyte and the small amount of water in a short time are inflated by the effect of high temperature and high pressure, and there is a deflation valve, and this condition will not be produced. The explosion condition can be formed unless the internal short circuit is short circuited.

The previous explosion of the mobile power supply was caused by the unqualified manufacturers of poor quality 18650 batteries, even secondhand waste electricity, to save cost. At present, 18650 lithium ion batteries produced by major brand battery manufacturers are actually very safe, and 18650 batteries are very high, we can use it correctly in daily use and avoid battery short circuit, damage or high temperature, without fear that the battery will explode. We can not overturn a boat man by a bamboo pole to identify the safety of 18650 lithium-ion batteries with individual inferior products.

I am a technician in Dongguan's Hongwei energy company, and sometimes I have to test the comprehensive mechanical performance of the lithium battery. If the test battery passes the standard, it can be shipped. It is dangerous to do these experiments because, like heavy hammer experiments, individual batteries will explode, and the steel shells are completely blown away, not the top of the lid, and the steel shell is blown into a piece. It was quite powerful. The experiment was carried out in an iron box. As soon as the battery exploded, the whole iron cabinet shook and shook, and the experimental cabinet had more than a hundred kilograms, and you could imagine how powerful the explosion was.

18650 the reasons for the explosion of lithium ion batteries are quite numerous.

1. battery material affects the safety of lithium batteries because the battery materials generally have thermal activity. When the external temperature or the battery temperature continues to rise, the lithium battery will do a lot of thermal reactions. If the temperature rises, the 18650 lithium ion battery has the possibility of explosion. Therefore, the choice of anode and cathode materials for lithium batteries has an important influence on the safety performance of batteries.

2. the quality control of each operation in the production is also an important factor affecting the battery safety performance. The positive and negative capacity ratio, the size uniformity control, the positive and negative electrode burr, the short circuit in the coil winding are detected to achieve the battery circuit after the finished product. When we use lithium battery, if there are overcharging or short circuiting, the internal short circuit will cause the lithium battery to burn, and the rapid chemical reaction inside the battery will cause explosion.

Explain so much, we sum up: in fact, for the lithium battery, there will be the cause of the explosion is understandable, after all the time before, for the stability of the grasp of not so serious, but the 18650 as a performance comparison of very high lithium battery, its application will be more and more widely, After all, the 18650 lithium battery is the best choice for such an indispensable battery.