What is the root cause of the cell phone explosion? How to avoid cell phone explosion?

Recently, the news related to the "mobile phone explosion" has repeatedly seen the news, which has made many people alert to the usual inseparable mobile phones. But you can't use a cell phone because it might explode, can you? The reporter interviewed Zhouhongzhi, an associate professor of the School of Applied Mathematics at Beijing University of Technology, and asked him to tell everyone about the explosion of mobile phones.

What is the root cause of the cell phone explosion?

Zhouhongzhi said that the root cause of the cell phone explosion is the cell phone battery, specifically divided into internal reasons and external reasons. The internal reason is that the cell phone battery quality does not pass. Most mobile phones now use lithium batteries. The storage power of lithium batteries is related to the activity of lithium metals. The activity of lithium metals is good, and the storage power of lithium batteries is high; The lithium metal has poor activity and the lithium battery has low power storage. Some manufacturers will inappropriately increase the activity of lithium metals in order to increase battery storage. However, the stronger the activity of lithium metals, the more likely it is to produce crystal branches and short circuits inside the battery, and the more likely the mobile phone will explode.

External causes are the main reasons for the explosion of mobile phones and directly related to mobile phone chargers. Zhouhongzhi said that when the phone is charging, the charger will convert the 220 Volt home voltage to about 5 Volt working voltage. This process requires that the charger component has good insulation performance and its production process needs to meet strict quality standards. As the insulation ability of some components and insulating materials in the charger is related to the power consumption of the charger, the power consumption will increase, and the insulation ability will decrease; In the charging process, if the charger's design circuit is inherently inadequate, the quality of components is poor, and the manufacturing process is not good, its insulation is easily destroyed. This situation can easily cause voltage breakdown and lead to an explosion of the mobile phone. In particular, some chargers have problems with their own circuit design and have great safety hazards. It is recommended that people pay more attention to their quality when buying cheap chargers.

What happens to your phone that could explode?

Zhouhongzhi reminded everyone that in most cases, the mobile phone will often appear before the explosion of the phenomenon of excessive hot mobile phone, so if the mobile phone is found to be too hot, it must be noticed. However, according to Zhouhongzhi, if the quality of the cell phone battery itself is problematic, there are often not many warning signs before the explosion, and the heating process is very rapid, and it is difficult for people to respond in time. When the cell phone battery itself does not have a quality problem, if there are some abnormal phenomena in the charging process of the mobile phone, such as the charger emits paste odor, the cell phone is unusually hot, etc., it needs to cause vigilance. At present, many of the better smartphones themselves have overheating protection functions, that is, when the heat is excessive, it will automatically cut off the power supply; However, for the high-pressure breakdown of the inferior charger, the superheat protection function is powerless.

In addition, Zhouhongzhi suggested that if you find cell phone batteries raised, charging too slowly, etc., indicating that the battery itself has aged or damaged, you should replace the battery in a timely manner.

How to avoid cell phone explosion?

Zhouhongzhi said that for individuals, in order to ensure their own safety, we should pay attention to the following points:

1, when buying mobile phones and chargers, must go to the regular store to purchase the products certified by the National 3C, do not buy fake products for the sake of cheap.

2, the best use of the original supporting charger to charge the mobile phone, different mobile phone charger is best not mixed.

Don't wait for the phone to run out of power. This will reduce battery activity and speed up battery aging. It is best to charge the phone when it has more than 30 % of the power.

4, non-professionals do not arbitrarily disassemble mobile phones and cell phone batteries. If the cell phone battery is a detachable battery, it must also be turned off and then dismantled.

Don't put your phone in a hot place. The ambient temperature of mobile phones is generally between minus 20 degrees Celsius and 45 degrees Celsius. Beyond or below this range may affect the normal use of mobile phones. Be particularly careful when the temperature is too high.

The page contains the contents of the machine translation.