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The principle of mobile phone charging

Article Source:Kinri Energy | Author:Kinri Energy | Issuing Time:2024.05.17
How to make boring knowledge interesting and abstract things vivid? Today, Kinri will use a simple model of "draining water" to help everyone understand the relevant knowledge about mobile phone charging.



Water tank: used to indicate our power grid, our vast power grid, you can imagine it as a bucket of water.

Valve: You can imagine it as a charger that controls the amount of water flowing into the cup by repeatedly switching on and off. If it weren't for this valve, you could imagine the consequences. In foreign countries, it is customary to call a charger an adapter, which means it has an adaptive function.

Water cup: It can be imagined as our phone battery or tablet battery. Water is electricity, transmitted through water pipes.

A mobile phone charger is actually a flyback type switching power supply, which generally has the following concepts: output voltage, output current, ripple, CV (constant voltage charging), CC (constant current charging). We can understand the process of charging a mobile phone as adding water to a cup through a valve, and the charger is the function of a valve:

Output voltage: The maximum water storage height allowed by the water cup, and the voltage is determined by the design circuit of the charger.

Output current: The size of the water pipe determines the amount of water flow, and the current is imagined as water flow. The current size is determined by the design of the charger circuit.

Output ripple: The size of the waves stirred by water entering the cup.

Constant current charging: This is a concept that many people are confused about. You can imagine that in the state of a hollow cup of water, we use a fixed aperture water pipe to fill the cup with water, and the water flow is constant, that is, constant flow.

Constant pressure charging: When the water cup is almost full, set a maximum limit water level and do not allow the quantity to exceed. By reducing the time and frequency of valve opening, the water flow rate can be reduced to achieve constant pressure charging. To understand this concept, it is also necessary to imagine that the water in the cup is inserted into a straw, and more or less water is sucked out of the cup, which is the concept of a load. When you add water, the water is still being consumed.

Does this statement make the entire charging process, including various concepts, very clear?