Two-roll extrusion coating production method of energy storage electrode

A technology for energy storage electrodes and production methods, applied in electrode rolling/calendering, battery electrodes, electrode manufacturing, etc., can solve the problems of reducing battery energy density, wasting materials, and large amount of positive electrode material dressings, etc. Stable quality effect

A technology for energy storage electrodes and production methods, applied in electrode rolling/calendering, battery electrodes, electrode manufacturing, etc., can solve the problems of reducing battery energy density, wasting materials, and large amount of positive electrode material dressings, etc. Stable quality effect

CN112542560BActive Publication Date: 2022-07-08QINGDAO NINEX NEW ENERGY TECH CO LTD
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  • Two-roll extrusion coating production method of energy storage electrode
  • Two-roll extrusion coating production method of energy storage electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0058] like figure 1 As shown, it is a schematic structural diagram of the two-roll extrusion coating production equipment for energy storage electrodes in Example 1 of the two-roll extrusion coating production method for energy storage electrodes of the present invention. The double-roll extrusion coating production equipment for the energy storage electrode includes:

[0059] Unwinding mechanism 10: for unwinding the current collector strip 1;

[0060] Extrusion coating device 20: used for extrusion coating the electrode material layer on the current collector strip 1 and obtaining the electrode strip 2;

[0061] Winding mechanism 30 : used for winding the prepared electrode strip 2 .

[0062] Specifically, the extrusion coating device 20 includes a group of extrusion rollers, and the group of extrusion rollers includes two extrusion rollers 21 whose axes are parallel to each other; The feeding device of the electrode material 3;

[0063] Between the unwinding mechanism ...

Embodiment 2

[0090] like figure 2 As shown, it is a schematic structural diagram of a two-roll extrusion coating production equipment for energy storage electrodes in Example 2 of the two-roll extrusion coating production method for energy storage electrodes of the present invention. The double-roll extrusion coating production equipment for the energy storage electrode includes:

[0091] Unwinding mechanism 10: for unwinding the current collector strip 1;

[0092] Extrusion coating device 20: used for extrusion coating the electrode material layer on the current collector strip 1 and obtaining the electrode strip 2;

[0093] Winding mechanism 30 : used for winding the prepared electrode strip 2 .

[0094] Specifically, the extrusion coating device 20 includes a group of extrusion rollers, and the group of extrusion rollers includes two extrusion rollers 21 whose axes are parallel to each other; The feeding device of the electrode material 3;

[0095] Between the unwinding mechanism 1...

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Abstract

The invention discloses a double-roll extrusion coating production method of an energy storage electrode, comprising: an extrusion coating process, wherein an electrode material layer is extruded and formed on at least one side of a current collector strip by a extrusion roller group; In the extrusion coating process, the roller gap between the two extrusion rollers is adjusted to a set range, and the electrode material that has been stirred and dispersed is added to the feed side of the two extrusion rollers; the two extrusion rollers are driven to rotate. , and make the tangential velocity of the squeezing roll equal to the velocity of the current collector strip passing between the two squeezing rolls, and the electrode material is extruded and coated on the current collector strip by the squeezing roll and formed The electrode material layer is obtained to obtain an electrode strip. The double-roll extrusion coating production method of the energy storage electrode of the present invention adopts the method of extrusion and coating at the same time, which can effectively control the extrusion thickness of the electrode material, and the bonding force between the electrode material and the strip is better. The quality of the produced energy storage electrode is more stable.

Description

technical field [0001] The invention relates to a production method of an energy storage electrode, in particular to a production method of double-roll extrusion coating of an energy storage electrode. Background technique [0002] The interior of a lithium battery is generally composed of positive electrode materials and their current collectors, negative electrode materials and their current collectors, electrolytes, separators, and shells. The content of the positive electrode material and the content of the negative electrode material are paired in a certain proportion to jointly determine the capacity of the battery, while the other components only play the role of constituting the battery system and do not provide capacity by themselves. On the premise that all components of a lithium battery have been determined, the only way to increase its energy density is to increase the proportion of positive electrode materials and negative electrode materials in the battery, an...

Claims

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Application Information

Patent Timeline
08 Jul 2022
Publication
CN112542560B
IPC
H01M4/04; H01M4/139
CPC
H01M4/0435; H01M4/139; Y02P70/50
Inventors
辛民昌; 李长明