Pole piece processing device

Abstract

The utility model belongs to the technical field of battery production, and particularly relates to a pole piece processing device which comprises a conveying roller set, a feeding assembly and a thinning control assembly, the conveying roller set comprises a clockwise conveying roller and an anticlockwise conveying roller which are adjacently arranged, a first rolling area is arranged between the clockwise conveying roller and the anticlockwise conveying roller, and a second rolling area is arranged between the clockwise conveying roller and the anticlockwise conveying roller. The feeding assembly is provided with a discharging unit, the discharging unit is located above the first rolling area, the thinning control assembly comprises a first baffle and a second baffle which are oppositely arranged at an interval, the first baffle and the second baffle are both arranged on the clockwise conveying roller and the anticlockwise conveying roller, and a powder area is arranged between the first baffle and the second baffle; the powder area is arranged between the discharging unit and the first grinding area. According to the utility model, the condition that the edge of the coating area of the pole piece is too thick can be avoided, and the effect of thinning the edge is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to a pole piece processing device. Background Art

[0002] With the development of battery technology, the use of lithium-ion batteries has become more and more widespread. In addition, the electrode sheets in existing lithium-ion batteries are generally prepared by wet method. In the production of traditional electrode sheets, N-methyl-2-pyrrolidone (NMP) is widely used in mixed solvents. However, NMP itself has certain toxicity in liquid state or when evaporated, which does not meet the needs of sustainable development. In addition, when the dry method is used to prepare the electrode sheets, although NMP is not needed, the existing dry method electrode sheets have thick edges, and the existing dry method electrode sheet preparation equipment cannot solve this problem, which has become the current technical difficulty. Utility Model Content

[0003] The purpose of the utility model is to provide a processing device for pole pieces to address the deficiencies of the existing technology, which effectively improves the control ability of pole piece edge thinning, avoids edge thickening and burrs, and effectively improves the utilization rate of raw materials.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A pole piece processing device, comprising:

[0006] A conveying roller group includes a clockwise conveying roller and a counterclockwise conveying roller arranged adjacent to each other, wherein a first rolling area is defined between the clockwise conveying roller and the counterclockwise conveying roller;

[0007] A feeding assembly having a feeding unit, wherein the feeding unit is located above the first rolling area;

[0008] The thinning control component includes a first baffle and a second baffle arranged relative to each other at an interval. The first baffle and the second baffle are both arranged on the clockwise conveying roller and the counterclockwise conveying roller. The powder area is between the first baffle and the second baffle, and the powder area is arranged between the unloading unit and the first crushing area.

[0009] As an improvement to the electrode processing device of the present invention, the thinning control assembly also includes a first support plate and a second support plate, and the opposite sides of the first baffle are respectively installed on the first support plate and the second support plate through a first positioning member, and the opposite sides of the second baffle are respectively installed on the first support plate and the second support plate through a second positioning member.

[0010] As an improvement to the pole piece processing device of the present invention, the clockwise conveying roller and the counterclockwise conveying roller are rotatably arranged on the frame respectively, and the first support plate and the second support plate are respectively installed on the frame.

[0011] As an improvement to the pole piece processing device of the present invention, the first baffle is in sliding contact with the clockwise conveying roller and the counterclockwise conveying roller respectively through a first smooth buffer pad, and the second baffle is in sliding contact with the clockwise conveying roller and the counterclockwise conveying roller respectively through a second smooth buffer pad.

[0012] As an improvement to the pole piece processing device of the present invention, the first baffle and / or the second baffle include a first corrosion-resistant layer, a smooth buffer layer and a second corrosion-resistant layer that are stacked, and the smooth buffer layer is in sliding contact with the clockwise conveying roller and the counterclockwise conveying roller respectively.

[0013] As an improvement to the pole piece processing device of the present invention, the bottoms of the first baffle and the second baffle are both configured as arc-shaped structures.

[0014] As an improvement to the pole piece processing device of the present invention, the first support plate and the second support plate are respectively provided with a slide groove, and the first positioning member and the second positioning member are respectively slidably provided in the slide groove.

[0015] As an improvement to the pole piece processing device of the present invention, one side of the first baffle is connected to the output end of the first driver, and one side of the second baffle is connected to the output end of the second driver.

[0016] As an improvement to the pole piece processing device of the present invention, the conveying roller group is arranged between the pole piece unwinding assembly and the pole piece winding assembly.

[0017] As an improvement to the electrode processing device of the present invention, the blanking unit, the electrode unwinding assembly and the electrode winding assembly are electrically connected to a controller respectively.

[0018] The beneficial effects of the present invention are: the present invention includes a conveying roller group, a feeding assembly and a thinning control assembly, the conveying roller group includes a clockwise conveying roller and a counterclockwise conveying roller arranged adjacent to each other, and a first rolling area is provided between the clockwise conveying roller and the counterclockwise conveying roller, the feeding assembly has a feeding unit, the feeding unit is located above the first rolling area, the feeding unit is used to feed the coating into the first rolling area, the clockwise conveying roller and the counterclockwise conveying roller roll each other to press out a coating layer with uniform thickness, the thinning control assembly includes a first baffle and a second baffle arranged relative to each other at intervals, the first baffle and the second baffle are both arranged above the clockwise conveying roller and the counterclockwise conveying roller, the powder area is between the first baffle and the second baffle, and the powder area is arranged between the feeding unit and the first rolling area, when the spacing between the first baffle and the second baffle is set according to a preset range, the edge of the coating layer can be effectively guided by the baffle and can be evenly spread, thereby effectively preventing the occurrence of thick edges at the edges of the pole pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 This is an assembly structure diagram of the first baffle and the first positioning member of the utility model.

[0021] Figure 3 This is an assembly structure diagram of the second baffle and the second positioning member of the utility model.

[0022] Figure 4 This is an assembly structure diagram of the baffle, support plate and conveying roller of the utility model.

[0023] Figure 5 This is a cross-sectional view of the first baffle of the present invention.

[0024] Figure 6 This is an assembly structure diagram of the support plate, conveyor roller, driver and frame of the utility model.

[0025] Figure 7 It is a three-dimensional structural diagram of the support plate of the present utility model.

[0026] Figure 8 This is a structural diagram of the feeding component and controller of the utility model.

[0027] Among them: 1. Conveyor roller group; 2. Feeding assembly; 3. Thinning control assembly; 4. Frame; 5. Pole piece unwinding assembly; 6. Pole piece winding assembly; 7. Controller; 8. Foil; 11. Clockwise conveyor roller; 12. Counterclockwise conveyor roller; 13. First rolling area; 21. Unloading unit; 22. Feeding unit; 31. First baffle; 31a. First positioning member; 31b. First smooth buffer pad; 32. Second baffle; 32a. First positioning member; 32b. Second smooth buffer pad; 33. Powder area; 34. First support plate; 35. Second support plate; 36a. First corrosion-resistant layer; 36b. Smooth buffer layer; 36c. Second corrosion-resistant layer; 37. Chute; 38. First drive; 39. Second drive. DETAILED DESCRIPTION

[0028] If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in name as a way to distinguish components, but rather use differences in the functions of the components as the criteria for distinction. For example, the term "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0029] In this utility model, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integral connection; it can mean mechanical connection, direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] The following is combined with Figures 1 to 8 The present invention is further described in detail with reference to the following specific embodiments, but is not intended to limit the present invention.

[0031] Example 1

[0032] A processing device for pole pieces, see Figures 1 to 4The conveying roller group 1 includes a clockwise conveying roller 11 and a counterclockwise conveying roller 12 arranged adjacent to each other, and a first rolling area 13 is provided between the clockwise conveying roller 11 and the counterclockwise conveying roller 12. The feeding assembly 2 includes a discharge unit 21, and the discharge unit 21 is located above the first rolling area 13. The thinning control assembly 3 includes a first baffle 31 and a second baffle 32 arranged opposite to each other at a distance. The first baffle 31 and the second baffle 32 are both provided above the clockwise conveying roller 11 and the counterclockwise conveying roller 12. The first baffle 31 and the second baffle 32 are provided above the clockwise conveying roller 11 and the counterclockwise conveying roller 12. Between the baffle 31 and the second baffle 32 is the powder area 33, which is arranged between the unloading unit 21 and the first rolling area 13. When the dry preparation material of the electrode is put into the powder area 33, the material will be limited between the first baffle 31 and the second baffle 32. At this time, the first baffle 31 and the second baffle 32 have a good guiding and spreading effect on the edge of the coating. When the material is evenly rolled by the clockwise conveying roller 11 and the counterclockwise conveying roller 12, the edge of the coating can be effectively thinned.

[0033] Preferably, the thinning control assembly 3 also includes a first support plate 34 and a second support plate 35. The opposite sides of the first baffle 31 are respectively installed on the first support plate 34 and the second support plate 35 through the first positioning member 31a, and the opposite sides of the second baffle 32 are respectively installed on the first support plate 34 and the second support plate 35 through the second positioning member 32a. The first support plate 34 and the second support plate 35 are arranged opposite to each other, and the first baffle 31 and the second baffle 32 can adjust the distance between the two baffles along the support plate.

[0034] Preferably, see Figure 6 The clockwise conveying roller 11 and the counterclockwise conveying roller 12 are respectively rotatably arranged on the frame 4, and the first support plate 34 and the second support plate 35 are respectively installed on the frame 4. The frame 4 can improve the stability of the device. The coating can form a coating film with uniform thickness under the stable and uniform rolling of the clockwise conveying roller 11 and the counterclockwise conveying roller 12, and then be conveyed to the surface of the foil 8 by the conveying roller.

[0035] Preferably, the first baffle 31 slides against the clockwise conveyor roller 11 and the counterclockwise conveyor roller 12 via a first smooth buffer pad 31b, and the second baffle 32 slides against the clockwise conveyor roller 11 and the counterclockwise conveyor roller 12 via a second smooth buffer pad 32b. Furthermore, the bottoms of both the first baffle 31 and the second baffle 32 are configured as arc-shaped structures. The two smooth buffer pads can be rubber pads, which are used to cushion the contact between the baffles and the conveyor rollers and reduce friction between the baffles and the conveyor rollers.

[0036] Preferably, see Figure 7The first support plate 34 and the second support plate 35 are respectively provided with a slide groove 37, and the first positioning member 31a and the second positioning member 32a are respectively slidably set in the slide groove 37, thereby improving the flexibility of adjusting the distance between the first baffle 31 and the second baffle 32. When the first baffle 31 and the second baffle 32 need to be fixed, the first positioning member 31a and the second positioning member 32a can be respectively locked in the slide groove 37 by bolts, and the baffle distance is used to fix the width size of the powder, that is, it can fix the width size of the coating membrane.

[0037] Preferably, one side of the first baffle 31 is connected to the output end of the first driver 38, and one side of the second baffle 32 is connected to the output end of the second driver 39. The first driver 38 and the second driver 39 can be installed on the frame 4 to meet the flexible adjustment of the distance between the first baffle 31 and the second baffle 32. The first driver 38 and the second driver 39 can both be motors.

[0038] Preferably, the conveying roller group 1 is arranged between the pole piece unwinding assembly 5 and the pole piece winding assembly 6, and the foil 8 is conveyed from the pole piece unwinding assembly 5 through multiple conveying rollers to the pole piece winding assembly 6, and the conveying roller group 1 coats the surface of the foil 8 with a coating film.

[0039] Preferably, see Figure 8 The feeding component 2 transfers the material to the unloading unit 21 through the feeding unit 22. The unloading unit 21, the electrode unwinding component 5 and the electrode winding component 6 are respectively electrically connected to the controller 7. The controller 7 can be a PLC controller. Under the electrical control of the controller 7, the electrode unwinding component 5 and the electrode winding component 6 run synchronously, and the unloading unit 21 can control the flow rate of feeding the material to the powder area 33 through the solenoid valve electrically connected to the controller 7, thereby making the electrode processing process efficient and controllable.

[0040] The above-mentioned dry method and device for preparing electrode sheets can effectively increase the maximum threshold of active material loading, thereby preparing higher quality electrodes and meeting the requirements for the preparation of dry electrode sheets for lithium / sodium batteries.

[0041] Example 2

[0042] The difference from Example 1 is that, see Figure 6The specific structure of the first baffle 31 and / or the second baffle 32 may include a first corrosion-resistant layer 36a, a smooth buffer layer 36b and a second corrosion-resistant layer 36c that are stacked. The first corrosion-resistant layer 36a, the smooth buffer layer 36b and the second corrosion-resistant layer 36c can be locked together by screws, and the first corrosion-resistant layer 36a and the second corrosion-resistant layer 36c can be Teflon layers. The Teflon layer is used to improve the strength of the baffle. The smooth buffer layer 36b is in sliding contact with the clockwise conveying roller 11 and the counterclockwise conveying roller 12 respectively. The buffer layer is used to buffer the contact between the baffle and the conveying roller, thereby reducing the friction between the baffle and the conveying roller.

[0043] The other structures of this embodiment are the same as those of embodiment 1 and will not be described again here.

[0044] Obviously, the device of the utility model effectively improves the control ability of the edge thinning of the electrode, can avoid thick edges and burrs, effectively improves the utilization rate of raw materials, does not require edge trimming of the coated membrane, will not cause waste of raw materials and increase production costs, and ensures that the coated area of ​​the electrode will not have excessively thick edges, thereby achieving the effect of edge thinning.

[0045] Based on the disclosure and teachings of the above description, those skilled in the art will be able to make changes and modifications to the above embodiments. Therefore, the utility model is not limited to the specific embodiments described above. Any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present utility model fall within the scope of protection of the present utility model. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation on the present utility model.

Claims

1. A pole piece processing device, characterized in that: include: A conveying roller group (1) comprises a clockwise conveying roller (11) and a counterclockwise conveying roller (12) arranged adjacent to each other, wherein a first rolling area (13) is provided between the clockwise conveying roller (11) and the counterclockwise conveying roller (12); A feeding assembly (2) having a feeding unit (21), wherein the feeding unit (21) is located above the first rolling area (13); The thinning control assembly (3) comprises a first baffle (31) and a second baffle (32) which are arranged relative to each other at an interval, wherein the first baffle (31) and the second baffle (32) are both arranged on the clockwise conveying roller (11) and the counterclockwise conveying roller (12), and a powder material area (33) is provided between the first baffle (31) and the second baffle (32), and the powder material area (33) is provided between the unloading unit (21) and the first crushing area (13).

2. The electrode processing device according to claim 1, characterized in that: The thinning control assembly (3) further comprises a first support plate (34) and a second support plate (35), wherein opposite sides of the first baffle (31) are respectively mounted on the first support plate (34) and the second support plate (35) via first positioning members (31a), and opposite sides of the second baffle (32) are respectively mounted on the first support plate (34) and the second support plate (35) via second positioning members (32a).

3. The electrode processing device according to claim 2, characterized in that: The clockwise conveying roller (11) and the counterclockwise conveying roller (12) are respectively rotatably arranged on the frame (4), and the first supporting plate (34) and the second supporting plate (35) are respectively installed on the frame (4).

4. The electrode processing device according to any one of claims 1 to 3, characterized in that: The first baffle (31) is in sliding contact with the clockwise conveying roller (11) and the counterclockwise conveying roller (12) respectively through a first smooth buffer pad (31b), and the second baffle (32) is in sliding contact with the clockwise conveying roller (11) and the counterclockwise conveying roller (12) respectively through a second smooth buffer pad (32b).

5. The electrode processing device according to any one of claims 1 to 3, characterized in that: The first baffle (31) and / or the second baffle (32) comprises a first corrosion-resistant layer (36a), a smooth buffer layer (36b) and a second corrosion-resistant layer (36c) which are stacked, and the smooth buffer layer (36b) is in sliding contact with the clockwise conveying roller (11) and the counterclockwise conveying roller (12), respectively.

6. The electrode processing device according to any one of claims 1 to 3, characterized in that: The bottoms of the first baffle (31) and the second baffle (32) are both configured as arc-shaped structures.

7. The electrode processing device according to any one of claims 2 to 3, characterized in that: The first support plate (34) and the second support plate (35) are respectively provided with a sliding groove (37), and the first positioning member (31a) and the second positioning member (32a) are respectively slidably arranged in the sliding groove (37).

8. The electrode processing device according to any one of claims 1 to 3, characterized in that: One side of the first baffle (31) is connected to the output end of the first driver (38), and one side of the second baffle (32) is connected to the output end of the second driver (39).

9. The electrode processing device according to any one of claims 1 to 3, characterized in that: The conveying roller group (1) is arranged between the pole piece unwinding assembly (5) and the pole piece winding assembly (6).

10. The electrode processing device according to claim 9, characterized in that: The unloading unit (21), the pole piece unwinding assembly (5) and the pole piece winding assembly (6) are electrically connected to a controller (7) respectively.

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