The mobile phone charging cable is the "lifeline" of the mobile phone, and almost every day people use it. This "lifeline" that is so important is often the easiest to ignore its "health" status. If used improperly, its potential safety hazards will also be released.
Here's a rough list of potential dangers in the phone's charging cable:
1. The mobile phone is charged without unplugging the charging circuit board plug;
2. The charger is too long to use and aging;
3. The charger is not dried due to moisture;
4. The charger wire or shell is broken.
Here is some basic common sense of the charger:
The transformer in the charger is to reduce the high voltage of 220 volts to a low voltage of 5 volts, so that there is a "voltage difference" between the high and low voltages, in such a small device, if the "electric tiger" rushes out of the isolation layer and is released, the burst combustion is an inevitable consequence.
As long as the charging plug is connected to the power supply, even if the other end is detached from the mobile phone, the transformer primary coil is still in the working state. This can easily cause the charger to heat up. If the insulation layer of the coil is aging or damaged, causing a short circuit, it is natural to cause a catastrophe.
To prevent the occurrence of the unexpected, you can pay attention to the following points:
1. Do not answer the phone while charging. Under normal circumstances, the insulation between components with dangerous voltages and accessible conductive parts is broken down or the contact current is too large, which can easily cause the user to be electrocuted. Especially for some smartphone users.
2. It is best to use direct charging. The original mobile phone charger has an overvoltage protection line, and is equipped with a rectifier transformer device, which can make the high voltage become low voltage, and the direct current is converted to ALTERNA. Most of the universal chargers are produced by informal manufacturers, without a protective coil, which is easy to make the voltage or current too high and unstable. Too high a voltage is easy to charge the battery, sometimes it will cause a dangerous explosion, and the mobile phone is easy to burn out.
3. Select products with qualified quality. When buying mobile phone chargers and batteries, we must choose qualified products from regular manufacturers, and do not try to be cheap enough for informal small manufacturers to buy products with unqualified electrical performance. Fire experts pointed out that a good charger has an overheating self-protection circuit inside, and when its internal temperature reaches a certain value, it will automatically disconnect the power supply and play a certain degree of protection.
4. Try to recharge when someone is watching. The mobile phone battery should try to choose when someone is charging, so that the abnormal situation can be handled in time. Charging should pay attention to the charger temperature and whether there is a scorched smell, if the temperature is too high, there is obvious hot hands or the smell of burnt paste, etc., to stop charging first, after checking out the cause and carrying out the necessary treatment before charging.
5. Don't cover anything while your phone is charging. When charging, the mobile phone voltage is higher than the standby state, if you use an unqualified battery or charger, coupled with a poor environment during charging, such as high temperature, humidity, etc., accidents may occur.
6. Unplug the power supply when not in use. After charging, remember to unplug the power supply, which can effectively prevent the power bus from causing a fire.
7. Prohibit ultra-long charging, especially inferior chargers and data cables without overtemperature protection and automatic power off function. Normally no more than four hours.
8. Select the charger and data cable matching the mobile phone, and prohibit the misuse of inferior chargers and data cables.
The last point can be said to be the "safety lock" of the mobile phone charging cable, that is, the charging cable contact is "deep protection", this method is very simple and reliable, and the charging cable plug contact and the internal electrical contact can be sprayed with "5GE nano protection agent". Its role is that the contact insertion and removal life is greatly extended, the insertion and removal no longer has a sense of stagnation, and the most critical thing is to improve the efficiency of electrical contact, moisture-proof, leakage-proof, and oxidation-proof.
Source: Popular Science China
Editor-in-charge: Lai Xiumei
Duty Director: Zhao Jun eel
Chief Editor-in-Chief: Lullivan
