Recently，the circle of friends went viral in the elevator electric bicycle lithium battery fire deflagging incident caused a lot of repercussions.The man was knocked unconscious in the elevator ， suffered extensive burns all over his body. Although he was treated, he died 26 days later.
Why does the lithium battery explode instantly when it is taken into the elevator?Usually, what should we pay attention to in order to avoid unnecessary safety risks?
“Why did the electric car battery explode as soon as it entered the elevator?”
The viral spread of this news has caused the public to have the illusion that ，electric bicycle lithium batteries will cause deflagration as soon as they enter the elevator.
Well, not necessarily.Lithium batteries into the elevator is not inevitable.
In the accident, the victim used the illegally modified lithium battery of the business is the main reason, and the victim in the home illegal charging led to overheating of the battery is also a reason. The party carried the overheating lithium battery into the confined space such as the elevator, which aggravated the seriousness of the accident.
The event has its particularity, then, and our lives are closely related to the lithium battery, in the end how to use it correctly?
Let’s first understand the lithium battery, understand the principle of the right medicine。
Lithium batteries are usually composed of four parts: a positive lithium compound (such as lithium cobalt oxide LiCoO2 or lithium iron phosphate LiFePO4), a negative material that can embed lithium, an electrolyte, and a layer of microporous diaphragm material that allows only lithium ions to pass through.
His power generation is mainly based on the embedding and deembedding process of lithium ions between the positive and negative electrodes.The positive and negative materials are vividly likened to the two ends of the “rocking chair”, and the lithium ions “swing” between the positive and negative electrodes to transfer energy, similar to the process of rocking back and forth in a rocking chair.
When the lithium battery is improperly charged, resulting in overheating inside the battery, the electrolyte will decompose and release flammable gases, which will cause an explosion when it encounters an open flame.Lithium battery overcharge, will also form lithium dendrites.
Lithium dendrites may puncture the diaphragm, resulting in a short circuit of the positive and negative electrodes, triggering thermal runaway.
Understanding the underlying logic, when we use lithium battery electric bicycles or cars in life, we should pay attention to the following reasons that may lead to the explosion of lithium batteries:
1.the temperature of the battery itself should not be too high, pay attention to heat dissipation under high temperature conditions, stop use, placed in the outdoor cool place.
2.protect the lithium battery from damage, the internal diaphragm material damage, will also lead to the battery explosion.
3.To use business-configured charging appliances , prevent the voltage and current of non-matching chargers from exceeding the specified value of the battery, resulting in high temperature when charging.
4.choose a regular brand lithium battery.
A small number of manufacturers in order to save costs and cut corners, the use of waste lead and other raw materials to refit lithium batteries, this lithium battery has no quality assurance and brand certification, the production of batteries are also prone to “leakage” this phenomenon.
Therefore, the lithium battery into the elevator will not lead to a direct explosion, we should try to use it correctly in life.Avoid lithium battery temperature is too high, overcharge, overdischarge, do not arbitrarily modify or damage the structure and appearance of the battery.The correct and safe use of lithium batteries, bicycles and electric vehicles related to lithium batteries, I believe that it can bring us more convenience than risk.