Analysis of the cause and explosion type of lithium battery

Yazar ：Iflowpower – Taşınabilir Güç İstasyonu Tedarikçisi

1: The internal polarization is large. 2: the pole water absorption, reacting the drum with the electrolyte. 3: The quality of the electrolyte itself, performance problem .

4: The amount of liquid in the liquid does not meet the process requirements. 5: assembly The laser welding in the process is poor, leakage, leakage, leakage. 6: dust, polar dust is first easily causing micro-short circuit.

7: The positive and negative poles are thick, the shell is difficult. 8: Nipple sealing problem, steel ball sealing performance is not good to cause gas drum. 9: Gövde malzemesinin kalınlığı ve gövde deformasyonunun kalınlığı.

The type of exploded type decomposing the battery core explosion can be summarized as an external short circuit, internal short circuit, Three kinds of. The external system here refers to the exterior of the battery, which contains short circuits caused by poor insulation design in the battery pack. When a short circuit is outside the battery cell, the electronic component is not cut off, and the interior of the battery cell will have high heat, resulting in a partial electrolyte steaming, and support the battery shell.

When the internal temperature of the battery is high to 135 degrees Celsius, the quality of the diaphragm is closed, the electrochemical reaction is terminated or near termination, the current is plummeted, and the temperature is slowly decreased, and the explosion occurred. However, the fine hole closure rate is too bad, or the fine hole does not close the diaphragm paper, which will make the battery temperature rise, more electrolyte, and finalize the battery housing, and even improve the battery temperature. Material burning and exploding.

The internal short circuit is to be because the brass foil is pulling the membrane of the aluminum foil, or the branches of the lithium atom wear the diaphragm. Bu ince iğneler mikro kısa devrelere sebep olabilir. İğne çok ince olduğu için belli bir direnç değeri var, dolayısıyla akım illa ki olmayacak.

Copper aluminum foil burr is caused by processing, and it is observable. Ayrıca arıza küçük olduğu için bazen pil yanabiliyor, böylece pil normale dönüyor. Bu nedenle çapaklardan kaynaklanan patlamanın olasılığı yüksek değildir.

Bu şekilde her bir hücrenin iç kısmından kısa bir bataryanın dahili olarak şarj edilmesi mümkün olur. Ancak patlama olayı gerçekleşmiş ancak istatistiksel olarak desteklenmiştir. Therefore, the explosion caused by internal short circuits, it is still due to overcharge.

Çünkü, iğne şeklinde bir lityum metal kristalleşmesidir ve bir mikro kısa devredir. Dolayısıyla akü sıcaklığı giderek artacak ve en sonunda yüksek sıcaklık elektrolit gazına dönüşecektir. This situation, whether it is too high to make the material burns, or the outer shell is first striking, so that the air into the lithium metal is violently oxidized, all of which are explosion.

Ancak aşırı iç kısa devreden kaynaklanan bu patlamanın mutlaka şarj anında meydana gelmesi gerekmiyor. It is possible that the battery temperature is not high to let the material burned. When the gas appears, the consumer is not enough to break the battery housing, the consumer will terminate the charging, with the mobile phone to go out.

At this time, the heat of many micro-short circuits, slowly increase the temperature of the battery, after a period of time, only explosion. Tüketicinin genel tanımı, telefonu eline aldığında telefonun ısındığını ve patladığını görmesidir.