Lithium battery explosion caused by the internal structural design

Panic caused by lithium ion battery cell phone explosion is always the thing after the terror, global brands including Dell, Apple has a similar embarrassment. This makes people think: lithium battery explosion was inevitable right?
Is used in cell phones, laptops and other lithium-ion battery, called the lithium-ion battery is fulfilled by the movement of lithium ions between the positive and negative power supply and release of the device, it calls lithium ion can be attached when the shuttle between the positive and negative factors affecting the clean movement. In theory, this design is possible, but in practice, due to extremely powerful lithium-ion batteries are sensitive products, any abnormal conditions can cause problems with the battery.
All lithium battery explosion is caused by a short circuit, causing short-circuiting has overcharge, discharge, over current, over heat, which is formed through the internal structure of lithium-ion batteries battery short circuit, the so-called internal causes external causes, lithium battery the structure itself is a manufacturing process, and manufacturing processes are difficult to 100% avoid defects exist.
Lithium-ion anode and cathode should clean their stay, through the electrolyte, the separator should also be free of impurities, but during the process of manufacture, electrolyte and diaphragm to completely avoid the metal dust, debris such as copper or aluminum foil. When people misuse (over charge, over discharge, overflow) or lithium-ion batteries in extreme conditions (high temperature), lithium-ion batteries can overheat, debris at room temperature, the quiet was broken, so as to be in a hot thermal motion in the electrolyte space. Next, if debris close to the diaphragm, hot debris that will affect the effect of diaphragm, was caused by short circuit. Visible, short circuit requires two things: one is that batteries have impurities in the body, second, impurities will move, their intermediary is fever, so fever with short-circuit the inevitable, and fever is not necessarily short. The third step, short circuit will give a spark, and the electrolyte is a combustible liquid, Sparks will lead to the battery in a confined space combustion and explosion, it is easy to understand. Therefore, there is a lithium polymer battery with gel electrolyte instead of liquid electrolyte, can reduce the probability of short circuit. But it cannot be completely avoided.
Once the battery short circuit, depending on the cell structure and the degree of temperature difference, in General, experience in battery leakage, combustion and explosion occurred three cases, and the worst.
Contact:
Person: Tim.lee
Company: Dongguan Large Electronics Co., Ltd
Add: Block A, Gaosheng Technology Zone, Nancheng District, Dongguan City, Guangdong Province, CN
Tel: 86-769-23182621
Email: Tim.lee@largepower.cn
Site: www.lithiumion-batterypack.com


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