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Recently, mobile phone explosions have occurred frequently. So under what circumstances will the phone explode? What should I pay attention to when I use it normally?
Jiang, a researcher of battery materials at the Fujian Institute of Engineering, said that the main culprit in the explosion of mobile phones was the mobile phone battery . What causes easy damage to the phone battery? Teacher Jiang summarized the following three reasons:
The temperature is too high: charging the phone for a long time, putting the phone in the sun and the temperature inside the car will cause the battery temperature of the phone to be too high. The suitable temperature of the mobile phone is 10 ° C ~ 35 ° C, so use and carry the phone should pay attention to reduce the temperature difference around it. When the phone is close to 80 ° C, it is most likely to cause an explosion, causing the phone to be destroyed or even a fire.
Overcharge: After normal charging is completed, continue high-voltage charging, so that the residual lithium ions of the positive electrode continue to transfer to the negative electrode, but the negative electrode cannot embed more lithium ions, so that lithium ions are precipitated as metallic lithium on the surface of the negative electrode, causing dendrites and the like. There is a danger of damage to the separator, short circuit of the battery, and leakage of the electrolyte.
Overdischarge: After the battery is normally discharged to the cutoff voltage, continue to discharge. Since it is necessary to maintain a certain lithium ion in the negative electrode to maintain the stability of the structure, excessive discharge will cause more lithium ions to migrate out, destroying the stable structure of the negative electrode, causing irreversible damage of the negative electrode.
Do not put the phone close to metal objects, which is easy to cause chemical reaction. The phone should pay attention to the following three aspects during use:
1. Anti-metal. Don't put your mobile phone battery close to metal objects, such as gold jewelry, bracelets, keys, etc. These metal objects can't be mixed with the mobile phone, because these conductors and the battery charging interface of the mobile phone can easily lead to short circuit. Cause the battery to overheat. A chemical reaction inside the battery or even an explosion.
2. Don't use it without electricity. When the mobile phone is charging, the lithium battery is most afraid of excessive discharge. Once the discharge voltage is lower than 2.7V, the battery may be scrapped. For lithium batteries, it should be shallowly charged and charged at any time.
3. It is best to charge during the day. In some places, electricity consumption is low at night, voltage is higher than during the day, voltage fluctuations are relatively large, and lithium batteries are more delicate. If charging in this case, battery life may be affected.
4. Do not mix iPad and iPhone chargers. In the middle of this month, someone in Shanghai used an iPad charger to charge the iPhone. The battery of the mobile phone was actually exploded, and it was separated when used.
Nowadays, the smart phone configuration is relatively high. When playing games or watching movies and surfing the Internet, the mobile phone will generate a certain amount of heat. When using it, the motherboard feels hot, and when the heat is not emitted, it may explode. It is best not to play games while charging the phone, and do not watch the mobile TV while charging. The voltage of the charger is unstable. If it is a poor quality battery, it may be dangerous.
When the phone is hot, turn off all the programs and let it cool off on one side, but when cooling the phone, these common methods must not be done:
1. When the mobile phone is overheated, it will be put into the refrigerator immediately, and the alternating hot and cold will generate a lot of water vapor, which will easily lead to battery short circuit and explosion;
2. The method of blowing the air conditioner to cool the mobile phone seems to be good. In fact, this is exactly the same as the mobile phone in the refrigerator. The temperature of the air outlet can be very low, it is best not to.
Jiang, a researcher of battery materials at the Fujian Institute of Engineering, said that the main culprit in the explosion of mobile phones was the mobile phone battery . What causes easy damage to the phone battery? Teacher Jiang summarized the following three reasons:
The temperature is too high: charging the phone for a long time, putting the phone in the sun and the temperature inside the car will cause the battery temperature of the phone to be too high. The suitable temperature of the mobile phone is 10 ° C ~ 35 ° C, so use and carry the phone should pay attention to reduce the temperature difference around it. When the phone is close to 80 ° C, it is most likely to cause an explosion, causing the phone to be destroyed or even a fire.
Overcharge: After normal charging is completed, continue high-voltage charging, so that the residual lithium ions of the positive electrode continue to transfer to the negative electrode, but the negative electrode cannot embed more lithium ions, so that lithium ions are precipitated as metallic lithium on the surface of the negative electrode, causing dendrites and the like. There is a danger of damage to the separator, short circuit of the battery, and leakage of the electrolyte.
Overdischarge: After the battery is normally discharged to the cutoff voltage, continue to discharge. Since it is necessary to maintain a certain lithium ion in the negative electrode to maintain the stability of the structure, excessive discharge will cause more lithium ions to migrate out, destroying the stable structure of the negative electrode, causing irreversible damage of the negative electrode.
Do not put the phone close to metal objects, which is easy to cause chemical reaction. The phone should pay attention to the following three aspects during use:
1. Anti-metal. Don't put your mobile phone battery close to metal objects, such as gold jewelry, bracelets, keys, etc. These metal objects can't be mixed with the mobile phone, because these conductors and the battery charging interface of the mobile phone can easily lead to short circuit. Cause the battery to overheat. A chemical reaction inside the battery or even an explosion.
2. Don't use it without electricity. When the mobile phone is charging, the lithium battery is most afraid of excessive discharge. Once the discharge voltage is lower than 2.7V, the battery may be scrapped. For lithium batteries, it should be shallowly charged and charged at any time.
3. It is best to charge during the day. In some places, electricity consumption is low at night, voltage is higher than during the day, voltage fluctuations are relatively large, and lithium batteries are more delicate. If charging in this case, battery life may be affected.
4. Do not mix iPad and iPhone chargers. In the middle of this month, someone in Shanghai used an iPad charger to charge the iPhone. The battery of the mobile phone was actually exploded, and it was separated when used.
Nowadays, the smart phone configuration is relatively high. When playing games or watching movies and surfing the Internet, the mobile phone will generate a certain amount of heat. When using it, the motherboard feels hot, and when the heat is not emitted, it may explode. It is best not to play games while charging the phone, and do not watch the mobile TV while charging. The voltage of the charger is unstable. If it is a poor quality battery, it may be dangerous.
When the phone is hot, turn off all the programs and let it cool off on one side, but when cooling the phone, these common methods must not be done:
1. When the mobile phone is overheated, it will be put into the refrigerator immediately, and the alternating hot and cold will generate a lot of water vapor, which will easily lead to battery short circuit and explosion;
2. The method of blowing the air conditioner to cool the mobile phone seems to be good. In fact, this is exactly the same as the mobile phone in the refrigerator. The temperature of the air outlet can be very low, it is best not to.
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