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Jul 21 , 2022
The main components for custom production of li ion battery are positive electrode material, negative electrode material, barrier and electrolyte. The customization process is also mainly based on these four battery materials.
The main components for customized production of li ion battery include positive electrode material, negative electrode material, barrier and electrolyte. The lithium-ion battery customization process is also mainly based on these four battery materials.
To custom lithium battery packs, the first step of the manufacturing process is to mix powdered positive and negative active materials with special solvents and binders, and then mix them evenly at a high speed to form slurry-like positive and negative materials.
It should be noted that the proportions of the positive and negative active materials of the lithium-ion battery, the solvent and the binder must be well adjusted. Otherwise, it will not only waste materials, but also produce harmful gases.
Afterwards, the prepared slurry-like positive and negative electrode materials are evenly smeared on the surface of the metal foil, and dried to form the positive and negative pole pieces. The paste-like cathode material is smeared on the aluminum foil, and the anode material is smeared on the copper foil. Regarding the requirements of the metal foil, it is necessary to know its standard, thickness, single-sided light or double-sided light.
As a bridge between the north and south poles of the positive and negative poles, the barrier is to isolate the positive and negative poles of the lithium-ion battery to prevent the north and south poles from contacting and forming a short circuit. At the same time, the barrier needs to have pores to allow lithium ions to travel between the positive and negative north and south poles. Therefore, the material of the customized barrier for li ion battery needs to be electronically insulated and can support the stability of the positive and negative north and south poles.
After correctly assembling the pole pieces and barriers of the positive and negative poles, inject electrolyte between the positive and negative poles. The electrolyte is like blood in a lithium-ion battery, transferring energy between the positive and negative north and south poles.
It should be noted that the humidity of the environment where the electrolyte is injected must be as low as possible. Moisture has a great influence on the electrolyte, and the injection hole should be closed in time after the electrolyte is injected.
Everyone knows that lithium battery customization is not only composed of a battery cell, except for some basic accessories, among which the most important lithium battery is the maintenance board. The maintenance board plays a role in maintaining the battery, so what maintenance functions does the maintenance board have for the lithium battery itself?
1. Short-circuit maintenance
The short circuit of a lithium battery has a great risk factor. The short circuit will cause a large current to be generated in the battery, and a large amount of heat will also be generated at the same time, which will severely damage the service life of the lithium battery. If more severe, the generated heat will cause the battery to burn and blasting.
The maintenance function of the lithium battery customized maintenance board is that when a large current occurs, the maintenance board will be turned off instantly, so that the battery is no longer powered and no heat will be generated.
2. Overcharge maintenance
As the charge level of the lithium battery increases, the voltage will also increase. When the voltage of the lithium battery exceeds the overcharge voltage threshold of the maintenance board, the maintenance board will cut off the battery and no longer charge it.
3. Over-discharge maintenance
The reduction voltage of the discharge capacity of the lithium battery also decreases. When the battery voltage drops to the threshold value of the over-discharge voltage of the maintenance board, the maintenance board will turn off the lithium battery and no longer discharge.