Pole piece assembly

Abstract

The utility model relates to the technical field of battery cell production process, in particular to a pole piece assembly, which comprises an anode pole piece, a cathode pole piece, an anode pole piece and a cathode pole piece, the anode pole piece comprises a pole piece coating area and a pole piece foil area, and a reinforcing structure is arranged on the pole piece foil area; according to the utility model, the reinforcing structure is arranged in the foil area of the pole piece, so that the bending and rolling probability of the copper foil can be reduced when the cutting edge of the pole piece cutter is cut, the feeding folding probability of the pole piece is reduced during winding, the winding yield is improved, the equipment debugging time is shortened, the production efficiency is further improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core production technology, and in particular to a pole piece assembly. Background Art

[0002] 3C batteries generally use winding machines to produce battery cells. The equipment adopts a single-sided needle extraction structure, actively unwinds the positive and negative electrode sheets and diaphragms, automatically corrects the deviation during the movement, automatically detects and controls the tension, and automatically affixes protective glue to the positive and negative electrode sheets. The sheets are fed into the winding part by the feeding mechanism and automatically wound together with the diaphragm according to the process requirements. After the winding is completed, the positive and negative electrode sheets are automatically cut off. During the cutting step of the sheets, since the sheets are relatively thin, the knife-cut edges are prone to bending when cutting.

[0003] In order to avoid bending on the winding machine in the related art, Teflon is attached to the electrode feeding point and an air blowing method is added to assist the electrode feeding and reduce the probability of the electrode head being bent. However, this method is not effective in improving the bending of the electrode feeding for severely bent electrodes, and different degrees of bending will still occur during the cutting step.

[0004] Therefore, how to prevent the electrode from bending during cutting is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0005] The utility model provides a pole piece assembly to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a pole piece assembly, comprising: an anode pole piece, which includes a pole piece coating area and a pole piece foil area, wherein a reinforcement structure is arranged on the pole piece foil area; the reinforcement structure includes stripes, and the stripes are arranged on the top surface of the pole piece foil area; the arrangement direction of the stripes is perpendicular to the cutting direction of the pole piece knife; the stripes are arranged at equal intervals; and a blank reinforcement area is formed between two adjacent stripes.

[0007] Furthermore, a pole piece head is provided on the pole piece foil area.

[0008] Furthermore, one side edge of the pole piece head is a pole piece knife-cut edge.

[0009] Furthermore, the foil in the electrode foil area is copper foil.

[0010] Furthermore, the copper foil is arranged on the top surface of the anode electrode.

[0011] Furthermore, the thickness of the copper foil is 5-10 μm.

[0012] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: by setting a reinforcing structure in the electrode foil area, the probability of copper foil bending and curling can be reduced when the electrode is cut, thereby reducing the probability of electrode feeding being folded during winding, improving the winding quality, reducing equipment debugging time, and thereby improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural schematic diagram of a preferred embodiment of a pole piece assembly of the present utility model;

[0015] Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0016] Figure 3 This is a bottom-view cross-sectional diagram of the electrode foil area of ​​the present invention;

[0017] Figure 4 It is a schematic side view of the cross-sectional structure of the pole piece assembly of the present utility model.

[0018] Among them, 1. Anode pole piece; 11. Pole piece head; 12. Pole piece knife cutting edge; 2. Pole piece foil area; 21. Copper foil; 3. Reinforcement structure; 31. Stripes; 32. Blank reinforcement area; 4. Pole piece coating area. DETAILED DESCRIPTION

[0019] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0020] See also Figure 1 , Figure 1 This is a schematic structural diagram of the optimal embodiment of a pole piece assembly of the utility model. Figure 1 As shown, the present invention provides a pole piece assembly, comprising: an anode pole piece 1, which includes a pole piece coating area 4 and a pole piece foil area 2, wherein a reinforcement structure 3 is provided on the pole piece foil area 2.

[0021] Anode plate 1

[0022] The anode electrode 1 includes a electrode coating area 4 and a electrode foil area 2. In the electrode production process, the electrode foil area 2 will be cut after the winding technology. In order to prevent the cut edge of the anode electrode 1 from bending, a reinforcement structure 3 is provided in the electrode foil area 2.

[0023] Pole foil area 2

[0024] Please continue reading Figure 1 Combined with Figure 4 , Figure 4 This is a side cross-sectional structural diagram of the pole piece assembly of the utility model. Figure 1 and 4 As shown, the foil in the electrode foil area 2 is copper foil 21. Copper foil 21 is placed on the top surface of the anode electrode 1. The thickness of copper foil 21 is 5-10 μm. A reinforcement structure 3 is provided on the electrode foil area 2. A electrode head 11 is provided on the electrode foil area 2. One side of the electrode head 11 is the electrode blade cutting edge 12. After the electrode is unwound, the electrode is cut downwards, and the cutting position is the electrode blade cutting edge 12.

[0025] Strengthening structure 3

[0026] See also Figure 2 Combined with Figure 3 , Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram; Figure 3 This is a schematic diagram of the cross-sectional structure of the pole piece foil area of ​​the utility model from a bottom view. Figures 2 to 3 As shown, the specific composition of the reinforcement structure 3 is described in detail below. The reinforcement structure 3 includes stripes 31, which are arranged on the top surface of the electrode foil area 2. The stripes 31 are arranged in a direction perpendicular to the direction of the electrode blade cutting edge 12. The stripes 31 are arranged at equal intervals. A blank reinforcement area 32 is formed between adjacent stripes 31. The spacing between the stripes 31 and the blank reinforcement area 32 can prevent bending at the cutting position of the electrode.

[0027] In summary, the beneficial effects of the present invention are: by setting stripes 31 in the electrode foil area 2, the probability of copper foil bending and curling can be reduced when cutting the electrode knife edge 12, and the probability of electrode feeding being folded during winding can be reduced, thereby improving the winding quality, reducing equipment debugging time, and thus improving production efficiency and reducing production costs.

[0028] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A pole piece assembly, characterized in that: include: An anode electrode (1) comprises an electrode coating region (4) and an electrode foil region (2), wherein A reinforcement structure (3) is provided on the pole piece foil area (2); The reinforcing structure (3) comprises stripes (31), and The stripes (31) are arranged on the top surface of the electrode foil area (2); A pole piece head (11) is provided on the pole piece foil area (2), and one side edge of the pole piece head (11) is a pole piece knife cutting edge (12); The arrangement direction of the stripes (31) is perpendicular to the direction of the electrode blade cutting edge (12), and the stripes (31) are arranged at equal intervals; A blank reinforcement area (32) is formed between two adjacent stripes (31).

2. The pole piece assembly according to claim 1, characterized in that: The foil material of the pole piece foil area (2) is copper foil (21).

3. The pole piece assembly according to claim 2, wherein: The copper foil (21) is arranged on the top surface of the anode electrode (1).

4. The pole piece assembly according to claim 3, characterized in that: The thickness of the copper foil (21) is 5-10 μm.

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