Note of lithium battery production process

The lithium battery has different production process because of different lithium battery manufacturers. Due to the same principle, it has the same main lithium battery production process. Here are the basic consistent: ingredients, coating, rolling, cutting, slitting machine, welding pole ear, winding, encapsulation, baking, filler, formation, molding, capacitance detection process, etc.

Lithium battery place in People's Daily lives, but it come from? Lithium battery production process what link? Although lithium battery production process depending on the different lithium battery manufacturers have some differences, but due to the same principle, and main lithium battery production process is almost the same.

In the lithium battery production process and essential step, from material to the forming of the capacity test should pay attention to five aspects of problems:

A across the electrodes, the improvement of the material structure of the active material, it is fundamental for lithium battery production process:

1, proper ion doping on the material,

2, improve the particle size distribution of active material, avoid the particle size distribution of the active material is too wide,

3, use as far as possible with disordered layered structure or structure with thin layer of material,

4, improve the surface of the electrode material structure;

Second, the electrode coating with high bond strength is beneficial to decrease the rate of circulation capacity declined, this is the most technical content in the lithium battery production technology process, therefore should pay attention to:

1, the formation of binder and the solvent adhesive materials to pure, pasted plate also shoulds not be too long,

2, anode coating mixture is used in the adhesive and the ratio of active material to appropriate, to ensure not to drop after coating powder, not to take off powder;

Third, the optimization of electrolyte, lithium battery production process is to keep the capacity to the requirement of the electrolyte, extend battery life:

1, through the optimization of lithium salts, solvents and additives, improve electrolyte conductivity and reduce polarization,

2, inhibit the reaction of the anode materials and electrolyte,

3, by controlling proper specific surface area and carbon anode materials for coating, surface treatment such as film and the surface chemical reaction, improve the surface of the anode materials structure;

Four, battery material preparation, after the completion of the lithium battery production process into assembly link, at this time to pay attention to:

1, the cathode capacity slightly greater than the positive capacity,

2, after winding is negative and the diaphragm, the formation of positive and negative pole piece and the diaphragm of the gap between the three size no greater than 0.5 mm, upper and lower deviation is less than 0.5 mm.

Five, the points for testing, in accordance with national standards, with a low rate of charging advisable, general is 0.2 C.

Technology in general and in the manufacturing stage should pay attention to the following proportion relations: extremely one-sided and compaction density, negative excess rate, technics, electrolyte with was negative amount shall apply.

Each step in the process of synthesis of lithium battery time have difference, in general, ingredients, baking, to turn into a long time, is about 10 hours, less number of two days and nights; Other process is faster, the average 5, and 6 hours.The lithium-ion battery production process takes about 15 days.

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