Method of coating battery electrode plates
A battery electrode and coating method technology, applied in battery electrodes, electrode current collector coating, electrode manufacturing and other directions, can solve the problems of difficult powder mixing evenly, difficult to fix, and the quality of the pole piece is reduced, to avoid voids or The effect of removing air bubbles, eliminating time-consuming and improving adhesion
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Embodiment 1
[0021] According to the proportion, the binder methyl cellulose, conductive carbon black and solvent water are mixed and stirred evenly to form a conductive paste, and then coated on the surface of the selected current collector copper foil to form a conductive paste on the surface. Glue coating layer, the thickness of the coating is controlled to be 2mm; and then the positive electrode active material powder or the negative electrode active material powder is continuously sprayed on the surface of the above-mentioned rubber gel coating layer by a linear flow spraying method using powder spraying equipment ; The tape running speed of the powder spraying equipment is set to be 3m / min in the present embodiment, and the powder spraying amount is 10g / s. Certainly, the tape running speed and the powder spraying amount can be adjusted according to actual conditions, and the positive electrode active material powder can adopt phosphoric acid here. Lithium iron and negative electrode a...
Embodiment 2
[0023] According to the proportion, the binder polymethyl methacrylate, Ketjen black and solvent water are mixed and stirred evenly to form a conductive paste, and then coated on the surface of the selected current collector aluminum foil to form on the surface Conductive adhesive coating layer, control the thickness of the coating to be 3mm; then use powder spraying equipment to spray the positive electrode active material powder or negative electrode active material powder continuously in the linear flow spraying method on the above-mentioned adhesive gel coating layer Surface; the belt speed of the powder spraying equipment is set to 5m / min in the present embodiment, and the amount of powder sprayed is 13g / s. Of course, the belt speed and powder injection amount can be adjusted according to actual conditions, and the positive electrode active material powder can be used here. Lithium manganate, the negative electrode active material powder can use two-dimensional material gr...
Embodiment 3
[0025]Select the binder polymethyl methacrylate, ketjen black and solvent water according to the proportion, mix and stir evenly to form a conductive paste, and then coat the surface of the selected current collector aluminum foil to form a conductive paste on the surface. Glue coating layer, the thickness of the coating is controlled to be 1mm; and then the positive electrode active material powder or the negative electrode active material powder is continuously sprayed on the surface of the above-mentioned rubber gel coating layer by a linear flow spraying method using powder spraying equipment In the present embodiment, the belt speed of the powder spraying equipment is set to be 4m / min, and the powder spraying amount is 8g / s. Here, the positive electrode active material powder can adopt the ternary material manganese iron phosphate lithium powder, and the negative electrode active material powder can adopt conductive graphite powder; of course, other positive and negative a...
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