What is the structure and shape classification of lithium batteries?

The manufacturing technology of lithium batteries is very strict and messy. The first steps in the process of lithium battery manufacturing are as follows:

1, special solvents and adhesives used in pulp preparation are mixed with powder positive and negative active substances. After mixing at high speed, the positive and negative polar substances are formed.

2, coating the resulting slurry evenly coated in the appearance of metal foil, drying, do not separate into positive and negative polar tablets.

3, the installation is arranged in the order of a positive pole piece, a negative pole piece, and a barrier from top to bottom. It is wound into a battery core, and then injected into electrolytes, seals, and other technical processes, that is, the installation process of the final battery. Make a product battery.

4, the special battery charging and discharging equipment for chemical use to test the batteries of products, each battery is inspected, and qualified products of batteries are screened and ready to be delivered.

The shape of the lithium battery of the battery is first and foremost cylindrical lithium battery and square lithium battery, in addition to the button lithium battery. In 1998, the output value of lithium batteries was 280 million(60 cylindrical batteries and 40 square batteries), of which 40 were used for notebook computers, 40 were used for mobile phones, and 20 were used for cameras. Regardless of the type of lithium battery, the basic structure of the lithium battery is: positive electrode, negative electrode, positive and negative polar set fluid, barrier paper, shell and sealing ring, cover plate and so on.

(1) The positive poles are now used by LCo() 2, LiNi02, LiMmo, etc.. From the point of view of electrical functions and other inductive functions, LiCoQ is used to make positive poles, and LiCo() 2 is mixed with binder(PbFE). It is then crushed on a positive collector fluid(aluminum foil) to make a positive electrode.

(2) The negative electrode compresses graphite and binders on the negative collector fluid(copper foil).

(3) The electrolyte is better than LiPF6, but it is expensive; Others have LiAsF6 but have great toxicity; LiClQ, with strong oxidizing properties; Organic solvents include DEC, DMC, and DME.

(4) The separation paper uses microporous polypropylene film or specially treated low-density polyethylene film. In addition, the shell, cap, sealing ring, etc., depending on the shape of the battery changes. And think about safety equipment.

Like a cylindrical lithium battery, the lid also has a specially processed crack valve to prevent the battery from overpressing and possibly presenting safety problems. Once this valve is opened, the battery will fail. Similarly, the electrode of the lithium battery is also wound up, which is completely different from the laminated structure of the square MH-Ni or Cd-Ni battery. Unlike cylindrical batteries, the positive column of a square lithium battery is a metal-ceramic or metal-glass insulator that completes the insulation between the positive pole and the shell.

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