ODM supply laptop lithium internal portable battery supplier Manufacturer

The battery of the laptop is the battery in the laptop. Now using a rechargeable battery is one of the advantages of a laptop over a desktop computer. It can greatly facilitate the use of notebook computers in various environments.

The earliest battery introduced was a nickel-cadmium battery (NiCd), but this kind of battery has a "memory effect", which must be discharged before each charge. It is very inconvenient to use. It was soon replaced by a nickel-hydrogen battery (NIMH). NIMH not only has no "memory effect", but also can increase the power per unit weight by 10%.

Effect

The function of the battery is to enable the notebook computer to stand by without AC power. It mainly relies on the battery inside to maintain energy. It can also be said that the quality of the battery determines the quality of the battery. The standby time of a normal notebook computer battery should not be less than 2H.

working principle

The working principle of laptop batteries is generally two in parallel and three in series, that is, two batteries in parallel, and then three groups of two batteries in parallel are connected in series. Sometimes it is called 6 cells, which means 6 batteries. There are also 4 cells for ultra-thin batteries and 8 cells for thickened batteries. Their working principles are the same. The more cells, the longer the standby time.

Internal structure

The internal structure of laptop battery is mainly composed of battery cell, charge and discharge control circuit board and temperature feedback line. The battery cell is the energy center of the battery, which is responsible for countless times of charge and discharge. The circuit board is used to control the charge and discharge of the battery cell. When the battery cell loses power, it is allowed to charge, and when the battery cell is full, it is cut off. Due to the large capacity of the notebook computer cell, it needs to undergo violent chemical reaction in the process of use. Therefore, for the sake of safety, it is necessary to strictly control the temperature of the cell not to be too high. The temperature feedback line plays a very important role here; When the temperature exceeds a certain level, it is sent to the circuit board through the temperature feedback line, and the charging can be cut off immediately.

Battery cell type

The notebook battery mainly adopts 18650 specification, that is, the battery is 65mm long and 18mm in diameter. This kind of battery is widely used in notebook batteries. Of course, some notebook batteries are constrained by shape and volume and use other types of battery cells.

There are three main types of batteries used in notebook computers: 1 Nickel cadmium battery, 2 Nickel metal hydride battery, 3 Lithium battery; They are generally expressed as: nickel cadmium Ni-Cd, nickel hydrogen Ni-MH, lithium battery Li.

When buying or replacing laptop batteries, the "battery cell" may be unfamiliar to many users. First of all, cell and battery are two concepts. A battery is composed of several small units that are slightly larger than the thumb, cylindrical, about 6-7 cm high and 18mm in diameter. The professional name is 18650. The cells are like small batteries. After series combination, they are the batteries we see.

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