If want to know why the perpetrators are always lithium battery, it is necessary to know the structure of lithium batteries. Lithium ends into positive and negative poles, the middle filled with electrolyte, the electrolyte flowing through the voltage, the lithium ion from one end to the other end, which is the charge and discharge processes.
This process is usually not a problem, but when a problem occurs, it will very quickly have great consequences. As to what is the problem? One common problem is caused by overheating of the battery overcharge even further the positive chemical changes may eventually burst into flames or explode. Do not think that overheating only happens in the batteries overcharge.
Similarly, excessive discharge of the same accident will occur, because the negative electrode comprising an oxide, and the electrolyte will produce a chemical reaction, and thus heat. The bad battery is also possible that there are impurities ran into the electrolyte resulting in the above reaction.
But do not underestimate this battery overheating problem, because overheating will cause the reaction to accelerate, once the temperature continued to soar even more than 150 ℃, it is likely on fire in your pocket or in the bag or portable solar power generator.
As for when the lithium battery may overheat? It's hard to say. Some poor quality or have a problem, or in the case of inappropriate use of lithium batteries is likely first charge or discharge at a serious overheating; and some may increase with the number of cycles of charge and discharge debilitating, leading to overheating. Whether it is positive or negative electrolyte, as long as there is a little problem, it may lead to disaster, this is perhaps the reason of the originator Segway balanced car explosion.
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