What is the cause of the lithium-ion battery explosion?

　　Author ：Iflowpower – Portable Power Station Supplier

External short circuit may cause improper operation, or misuse, due to external short circuit, the battery discharge current is large, the heat of the battery can cause the electrical core to shrink or completely disrupt the inside of the cell, resulting in internal short circuit, and thus exploding. External short circuit possible station: 1, the upper battery is not good, resulting in positive and negative contact; 2, the battery is fired during turnover;. Internal short circuit due to short-circuit phenomena internally, the battery is high current discharge, there is a large amount of heat, burn the diaphragm, resulting in a larger short-circuit, so that the battery is high temperature, so that the electrolyte is analyzed into a gas, causing internal pressure over Big, when the neck of the battery cannot withstand this pressure, the battery will explode.

Internal short circuit: 1, the positive and negative slice of burrs; 2. Positive and negative pole small pieces; 3, positive and negative polar small slice; 4, negative pole riveting is not flat, there is burr; 5, winding does not ; 6, the diaphragm paper has a sand eye; 7, the pressure is too large; 8 When the temperature is too high, the temperature is too high; 12, the upper glue position is not correct; 13, the high temperature rubber paper encloses the negative ear; 14, the bottom gel is not fully enclosed. When the charging is overcharged, the lithium of the positive electrode will change the structure of the positive electrode, and the excessive lithium is too much easily inserted into the negative electrode, and it is easy to cause the negative electrode surface to the lithium, and when the voltage reaches 4.

5V , Electrolyte will analyze a large number of gas. It may cause explosion in all kinds of. Overcharged Possible State: 1, the current is set too large; 2, the individual point current of the pre-charger is too large; 3, the battery capacity is insufficient; The voltage is large; 6, when the user is used, the charger voltage is large.

The overlating water content is over high moisture, and when the electrolytic solution in the battery can be processed, the gas can be reacted with the generated lithium, resulting in lithium oxide, so that the capacity of the battery is lost, which is easy to overcharge the battery. Generating a gas, the moisture is low, and it is easy to analyze the generated gas when charging. When this series of generated gas increases the internal pressure of the battery, the electrical core will explode when the outer casing of the battery cannot be affected.

Insufficient negative electrode capacity When the negative electrode portion of the positive electrode portion is insufficient, or when there is no capacity, the portion or all of the lithium that appears when charging is inserted into the interlayer structure of the negative electrode graphite, and the surface of the negative electrode is analyzed. When the transverse crystal is charged, the protruding portion is more likely to cause lithium precipitation. After dozens to hundreds of cycles of circulation, the dendrites will grow up, and finally thorns the diaphragm paper, so that short circuit occurs inside.

Stone with insufficient negative electrode capacity: 1, the positive electrode is high; 2, the negative electrode is low; 3, the positive and negative mixing is uneven; 4, the positive electrode dressing is large; 5, the positive electrode coating is uneven; 6, the positive tail tail stack; 7, the negative electrode coating is uneven; 9, negative electrode darkness; 10, negative scale scratches; 11, negative electrode pose; 12, negative electrode foil; 13, negative particles; 14, negative electrode tablets Due to death; 15, positive and negative power distribution errors; 16, negative poles can not live;.