Structure and working principle of power adapter and battery

The power adapter mainly consists of a power cord, a plug and a high-quality power adapter circuit board. Among them, the power adapter circuit board is the core component of the power adapter. The power adapter is a power conversion circuit that keeps the electronic switching device in the on and off states through the relevant control circuit to pulse-modulate the input voltage to achieve the purpose of AC and DC voltage conversion. The power adapter has the characteristics of adjustable output voltage and automatic voltage stabilization.

Notebook computer power adapters usually have a nameplate that indicates the basic information of the power adapter, such as the brand, origin, input voltage and current, output voltage and current, and precautions.

Different brands and models of laptops use different plugs, so laptop power adapters are generally not universal. In order to solve the problem of universality, some power adapter wholesale manufacturers in the market have designed multi-standard plugs, which can be suitable for different brands and models of notebook computers.

Lithium-ion batteries currently used in notebook computers usually experience aging problems to varying degrees after two years of use, resulting in shorter standby times and weaker mobile performance of notebook computers. Usually, the solution to this problem is to replace the battery or the cells in the battery.

The main structure of a notebook computer power adapter includes a housing, a battery cell, and a control circuit board. The output voltage of a single battery cell is generally around 3.6V. Manufacturers generally use a series and parallel connection of multiple battery cells to obtain a battery output voltage of about ten volts. The main function of the control circuit board is to provide feedback to the related circuits in the motherboard after charging protection and the battery is fully charged to stop the charging process.

The parameters of notebook battery performance mainly include: battery type, battery capacity, battery voltage, external dimensions, product weight, number of battery cells, and applicable models. At present, the type of battery used in notebook computers is usually a lithium-ion rechargeable battery, and the battery capacity is usually between 2 000 mA and 10 000 mA. Among them, about 5 000 mA is the battery capacity used by mainstream notebook computers. Battery capacity is closely related to the number of battery cells. The larger the battery capacity, the more the number of battery cells will inevitably increase, and the weight will be relatively large.

Different types of notebook computers can use different batteries, the main difference is that they require different battery input voltages, and different notebook computers use different battery sizes, so the batteries are not universal. When using or replacing the laptop battery, you must pay attention to the brands and models that the battery can be used for.