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The Function Of Mobile Phone Charger
Jul 25, 2017

1. The quality seat can identify the lithium battery and the nimh battery, and then decide the charging mode. Lithium battery protection circuit board has a integrated circuit to store the characteristics of the lithium battery materials, it give up her seat on the one hand can identify lithium batteries, to determine the "current" and "constant voltage charging mode; On the other hand, the phone can also identify the lithium battery to determine the discharge mode. 

2. The charging mode of nimh battery adopts "fixed current". The metal hydride battery itself is not afraid of charging, and when the nickel hydride battery is overcharged, it will have a reverse reaction to prevent the voltage from rising, which will make the battery slightly hot. In addition, nimh batteries usually have a thermistor to prevent the battery from overcharging. Most cell phone's working voltage is about 3.6 V, so it needs three nickel-metal hydride battery core. In general, the core of the metal hydride battery has been charged to about 1.4 ~ 1.5v, which is to stop, the maximum voltage of the three batteries is about 4.4 V. 

3. Due to the risk of overcharge of lithium batteries, the setting conditions for charging and discharging are more stringent than nickel-cadmium batteries and nimh batteries. Lithium batteries usually attach a control board to prevent charging. According to the characteristics of lithium battery design, the first period of charging is based on "current" way, by the time the fast charge to "voltage" (about 4.1 ~ 4.2 V) battery charging ways to achieve the best state. In the market, there are some artificial cutting materials, and cell phone batteries are recognized as nimh batteries, while charging in the "fixed current" way can easily lead to overcharging of lithium batteries. The protective circuit board will protect the lithium battery to prevent the charger from being recharged. If you encounter a poorly designed circuit board, it will not protect the battery, cause the battery to overcharge, and may cause the battery core to deform, leak, explosion and so on due to overcharge. 

4. The seat charge is mostly used for quick charging, which is usually filled in 3 ~ 4 hours. When the charge is fully charged, the battery is still very weak, even if the battery is not removed from the seat. 

5. The memory effect of nickel metal hydrogen battery is not large, and it is not necessary to discharge frequently. The charger that is sold on the market, the attached discharge device is of different quality. The phenomenon of poor quality will have a discharge, easy to cause the battery internal corrosion of negative plate (internal nimh battery electrolyte is potassium hydroxide alkaline solution), thereby reducing the capacity of the battery life, and can use at ordinary times. In this case, the battery will go bad faster every time you discharge it and recharge it. Normally, the best way to discharge a battery is to charge it when it is powered off.