At today that science and technology flies to develop soon, the electronics equipments of various ambulation is in mankind live a great deal of application, the lithium battery also develops to become immediately and quickly battery realm two times in an industry of the importance.The lithium battery is comparing the capacity and having no memory effect, longevity life, environmental protection...etc. comprehensive function far far above other battery two times, the lithium battery is called" ultimate end battery", but why in the big capacity  battery realm did not see the figure of the lithium battery?The key problem is the check and supervision of the safety problem that is subjected to the lithium battery.The hope passes the safety that this text can know the lithium ion battery for the everyone, bringing the help for the choice and the applied lithium  ion battery, the development of the push lithium  ion battery.

　  A, lithium battery why have the safety problem

 
1, inner part how short circuit is become:The biggest  of the lithium ion battery suffer from is the applied cobalt  lithium ion battery of the sour lithium is under the circumstance that lead the  , the lithium ion piles up to become  in the anode, piercing the diaphragm, becoming the internal short circuit.

2, produce the big electric current:The exterior short circuit, the internal short circuit will produce several 100 amperes of over big electric current

    I. The exterior short circuit hour, because the exterior loads low, the battery moment the big electric current turn on electricity.At inside  consumes a great deal of energy, producing the huge calories.

    II. The inner part short circuit, the main reason is a diaphragm to was wear deeply, the inner part becomes the big electric current, temperature the rising causes diaphragm melt, the short-circuit area extend, then becoming the vicious cycle
 
3, air is where come:In order to attain the high work electric voltage( the hydrogen of  batteries work the electric voltage as 1.2 Vs, sour battery of lead work electric voltage is 2 Vs) that the list gives or get an electric shock 34.2 Vses of －s of 芯 only, the lithium ion battery must adopt to resolve the electric voltage big in the organic electrolyte of the 2 Vs, but adopt the organic electrolyte in the big electric current, under the condition of the heat meeting drive electrolysis, the electrolysis creation air, cause internal pressure go up, the severity will break through the hull body
  
4, how combustion is take place:The calories comes from the big electric current, at the same time under the condition of high electric voltage( over 5 Vs), the oxide of the cathode lithium also will take place to oxidize the reaction, a metals  lithium, under the condition that air causes the hull body break, get in touch with directly with the air, cause combustion, emblaze the electrolyte at the same time, take place the strong flames, rapid inflation of air, take place the explosion.
   
5, whether the polymer battery there will be the safety problem or not:The differentiation of the polymer battery and the lithium ion battery lies in the electrolyte as gum form, the half solid, the lithium ion  battery electrolyte is a liquid.So, the polymer battery can use the tetrapak, producing the air interiorly, can with the more early breakthrough  hull body, avoid the air gathering excessive, produce the vehemence to rise  .But the polymer battery did not resolve the safety problem by the root, sour lithium and organic electrolytes of same usage cobalt, and the electrolyte is the gum form, leaking not easily, will take place the more violent combustion, the combustion is the safety biggest problem in the polymer battery.