Battery pole piece rolling device

Abstract

The utility model belongs to the technical field of battery production, and discloses a battery pole piece rolling device. The battery pole piece rolling device comprises a first rolling assembly and a second rolling assembly, the first rolling assembly comprises a first gasket and a first roller set, the first roller set comprises at least two first rollers, and the at least two first rollers are arranged in the first gasket at intervals and can drive the first gasket to rotate. The second rolling assembly comprises a second gasket and a second roller set, the second roller set comprises at least two second rollers, and the at least two second rollers are arranged in the second gasket at intervals and can drive the second gasket to rotate. A rolling channel is formed between the first gasket and the second gasket, the pole piece can penetrate through the rolling channel and is in contact with the first gasket and the second gasket, and at least one first roller and at least one second roller are arranged in an aligned mode so as to roll the pole piece. According to the battery pole piece rolling device, the risk of belt breakage of the pole piece can be effectively reduced, and the production quality and the production efficiency of the pole piece can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a battery pole piece rolling device. Background Art

[0002] During the production process of lithium-ion battery pole pieces, the pole pieces need to go through multiple processes such as coating, drying, and rolling. Through the rolling process, the pole pieces will be stretched and thinned, thereby ensuring that the produced pole pieces have appropriate compaction density and thickness, thereby ensuring the quality of the produced batteries.

[0003] However, when lithium-ion battery electrodes are rolled, due to pinholes on the surface of the anode and cathode foils, the electrodes are easily broken when subjected to rolling force, resulting in low production quality and efficiency.

[0004] Therefore, there is an urgent need to improve the battery pole sheet rolling device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a battery pole piece rolling device, which can effectively reduce the risk of pole piece breakage during rolling, and is conducive to improving the production quality and production efficiency of the pole piece.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery pole sheet rolling device, comprising:

[0008] A first rolling assembly, comprising a first washer and a first roller set, wherein the first roller set comprises at least two first rollers, and the at least two first rollers are arranged in the first washer at intervals to tension the first washer, and the first rollers can drive the first washer to rotate;

[0009] A second rolling assembly includes a second washer and a second roller group, wherein the second roller group includes at least two second rollers, and the at least two second rollers are arranged in the second washer at intervals to tension the second washer, and the second rollers can drive the second washer to rotate;

[0010] A rolling channel is formed between the first gasket and the second gasket, and the pole piece to be rolled can pass through the rolling channel, and the pole piece is in contact with the first gasket and the second gasket. At least one of the first roller and the second roller is aligned to roll the pole piece.

[0011] As an optional solution, at least two of the first rollers are arranged in one-to-one alignment with the second rollers.

[0012] As an optional solution, the first washer is provided with first internal teeth, the first roller is provided with first external teeth, and the first internal teeth are meshed with the first external teeth, so that the rotation of the first roller can drive the first washer to run synchronously; and / or,

[0013] The second washer is provided with second inner teeth, and the second roller is provided with second outer teeth, and the second inner teeth are meshed with the second outer teeth, so that the rotation of the second roller can drive the second washer to run synchronously.

[0014] As an optional solution, the width D1 of the first gasket and / or the second gasket is not less than the width D2 of the pole piece, so that the pole piece can be covered by the first gasket and / or the second gasket when passing through the first gasket and the second gasket.

[0015] As an optional solution, the thickness of the first gasket and / or the second gasket is greater than 10 mm.

[0016] As an optional solution, the distance between the first gasket and the second gasket can be adjusted so that the pole pieces with different thicknesses can all pass through the rolling channel.

[0017] As an optional solution, the first roller set and / or the second roller set can be moved and adjusted in the thickness direction of the pole piece.

[0018] As an optional solution, the pole sheet is released from the unwinding shaft, rolled by the battery pole sheet rolling device and then wound onto the winding shaft, and the two ends of the first gasket and the second gasket extend toward the unwinding shaft and the winding shaft respectively, and maintain a preset gap with the unwinding shaft and the winding shaft.

[0019] As an optional solution, the first roller and the second roller arranged opposite to each other have the same diameter.

[0020] As an optional solution, at least two of the first rollers have different diameters, and the first roller with the largest diameter is connected to a first driving member, and the first driving member is used to drive the first roller to rotate; and / or,

[0021] At least two of the second rollers have different diameters, and the second roller with the largest diameter is connected to a second driving member, and the second driving member is used to drive the second roller to rotate.

[0022] Beneficial effects:

[0023] The battery pole piece rolling device proposed in the utility model forms a rolling channel between the first washer and the second washer by setting a first washer and a second washer, and the pole piece passes through the rolling channel, and the first roller and the second roller set opposite to each other exert an extrusion force on the first washer and the second washer, so that the first washer and the second washer roll the pole piece. The rolling pressure output by the first roller and the second roller is dispersed by setting the first washer and the second washer, and evenly applied to the pole piece surface, so that the risk of the pole piece breaking during the rolling process can be effectively reduced, which is conducive to improving the production quality and production efficiency of the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of collecting and releasing the pole piece provided by the embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the pole piece provided by the embodiment of the utility model;

[0026] Figure 3 It is a structural schematic diagram of a battery pole sheet rolling device provided by an embodiment of the utility model;

[0027] Figure 4 It is a structural schematic diagram of a first rolling assembly provided in an embodiment of the utility model;

[0028] Figure 5 It is a structural schematic diagram of a first gasket provided in an embodiment of the utility model;

[0029] Figure 6 yes Figure 5 A magnified view of the structure at center.

[0030] In the figure:

[0031] 1. first rolling assembly; 11. first washer; 111. first inner tooth; 12. first roller assembly; 121. first roller; 1211. first outer tooth;

[0032] 2. second rolling assembly; 21. second washer; 211. second inner teeth; 22. second roller assembly; 221. second roller; 2211. second outer teeth;

[0033] 3. Pole piece; 31. Coating area; 32. Pole ear area; 321. Positive pole ear; 322. Negative pole ear;

[0034] 4. Unwind the reel; 5. Rewind the reel. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] like Figure 1 As shown, the pole piece 3 is wound on the unwinding shaft 4 and stored in a roll. When rolling is required, the pole piece 3 is released from the unwinding shaft 4, rolled by a rolling device, and then wound on the winding shaft 5. During the rolling process, the unwinding shaft 4 and the winding shaft 5 rotate synchronously.

[0040] like Figure 2As shown, the pole piece 3 includes a coating area 31 and a pole ear area 32. The pole ear area 32 is not coated with active material. The pole ear area 32 is arranged at both ends of the width direction of the coating area 31. A positive pole ear 321 is arranged at one end of the coating area 31, and a negative pole ear 322 is arranged at the other end. The total width of the pole piece 3 is D2, and the width of the coating area 31 is D3.

[0041] like Figure 3 As shown, this embodiment provides a battery pole piece rolling device, which is arranged between the unwinding shaft 4 and the winding shaft 5, and is used to roll the pole piece 3 released from the unwinding shaft 4, and stretch and thin the pole piece 3. Specifically, the battery pole piece rolling device includes a first rolling assembly 1 and a second rolling assembly 2, the first rolling assembly 1 includes a first washer 11 and a first roller group 12, the first roller group 12 includes at least two first rollers 121, at least two first rollers 121 are arranged in the first washer 11 at intervals to tighten the first washer 11, and the first roller 121 can drive the first washer 11 to rotate. The second rolling assembly 2 includes a second washer 21 and a second roller group 22, the second roller group 22 includes at least two second rollers 221, at least two second rollers 221 are arranged in the second washer 21 at intervals to tighten the second washer 21, and the second roller 221 can drive the second washer 21 to rotate. A rolling channel is formed between the first gasket 11 and the second gasket 21 , and the pole piece 3 to be rolled can pass through the rolling channel, and the pole piece 3 is in contact with the first gasket 11 and the second gasket 21 , and at least one first roller 121 and a second roller 221 are aligned to roll the pole piece 3 .

[0042] By providing the first gasket 11 and the second gasket 21, a rolling channel is formed between the first gasket 11 and the second gasket 21, and the pole piece 3 passes through the rolling channel, and the first roller 121 and the second roller 221 provided opposite to each other apply extrusion force to the first gasket 11 and the second gasket 21, so that the first gasket 11 and the second gasket 21 roll the pole piece 3. By providing the first gasket 11 and the second gasket 21, the rolling pressure output by the first roller 121 and the second roller 221 is dispersed and evenly applied to the surface of the pole piece 3, thereby effectively reducing the risk of the pole piece 3 being broken during the rolling process, which is conducive to improving the production quality and production efficiency of the pole piece 3.

[0043] The pole piece 3 is released from the unwinding shaft 4, rolled by the battery pole piece rolling device, and then wound onto the winding shaft 5. The two ends of the first gasket 11 and the second gasket 21 extend toward the unwinding shaft 4 and the winding shaft 5, respectively, and maintain a preset gap with the unwinding shaft 4 and the winding shaft 5. The preset gap is as small as possible and does not interfere with the unwinding shaft 4 and the winding shaft 5. When the pole piece 3 is rolled and subjected to force, the pulling force on the pole piece 3 during unwinding and winding is decomposed by the first gasket 11 and the second gasket 21, which is conducive to keeping the pole piece 3 from breaking when rolled.

[0044] Specifically, the first rolling assembly 1 and the second rolling assembly 2 adopt the same structure and are respectively arranged on the upper and lower sides of the pole piece 3. Under the support and tension of at least two first rollers 121, the lower side surface of the first gasket 11 forms a flat first rolling surface; similarly, the upper side surface of the second gasket 21 forms a flat second rolling surface. The first rolling surface and the second rolling surface form a larger area of ​​contact with the pole piece 3, so that the force on the pole piece 3 is more uniform.

[0045] Optionally, at least two first rollers 121 are aligned with the second roller 221. By aligning the first roller 121 and the second roller 221 up and down, multiple squeezing forces are formed on the pole piece 3, which is more conducive to rolling the pole piece 3 evenly. In this embodiment, three first rollers 121 and three second rollers 221 are respectively provided, and the three first rollers 121 and the second rollers 221 are aligned one by one. Of course, the number of the first rollers 121 and the second rollers 221 is not limited thereto, and two or more than three can be provided as needed.

[0046] Optionally, the first roller 121 and the second roller 221 arranged opposite to each other have the same diameter to facilitate the control of the synchronous rotation of the first roller 121 and the second roller 221, which is beneficial to adjust the first gasket 11 and the second gasket 21 to form the same moving linear speed, ensuring that the pole piece 3 will not be pulled and damaged due to different forces on the upper and lower sides when moving in the rolling channel.

[0047] Alternatively, if Figure 3 and Figure 4 As shown, at least two first rollers 121 have different diameters, and the first washer 11 is tensioned, roughly forming a triangular structure. The first roller 121 with the largest diameter is connected to the first driving member, and the first driving member is used to drive the first roller 121 to rotate; and / or, at least two second rollers 221 have different diameters, and the second roller 221 with the largest diameter is connected to the second driving member, and the second driving member is used to drive the second roller 221 to rotate. The first driving member and the second driving member can specifically adopt motors, and the first roller 121 and the second roller 221 are driven by the corresponding motors to rotate. The first roller 121 with the largest diameter acts as a driving wheel to drive the first washer 11 to rotate, and the other first rollers 121 act as driven wheels to rotate with the first washer 11. The working process of the second roller 221 is the same as that of the first roller 121, and will not be repeated.

[0048] In other embodiments, the diameters of the first rollers 121 may be the same. Figure 5 As shown, the first washer 11 is tensioned and roughly presents a rectangular structure. At this time, the first roller 121 in the middle is preferably used as a driving wheel to better drive the first washer 11 to rotate.

[0049] like Figure 4-Figure 6As shown, in order to achieve the synchronous operation of each first roller 121 and the first washer 11, the first washer 11 is provided with a first inner tooth 111, and the first roller 121 is provided with a first outer tooth 1211, and the first inner tooth 111 is meshed with the first outer tooth 1211, so that the rotation of the first roller 121 can drive the first washer 11 to run synchronously. At the first rollers 121 at both ends, the first washer 11 is bent into an arc shape, and the tooth spacing of the first inner teeth 111 will be reduced. In this regard, the tooth spacing and shape of the first outer teeth 1211 of the first rollers 121 at the bending points at both ends are adaptively designed to ensure that the deformed first inner teeth 111 can mesh with the first outer teeth 1211.

[0050] Similarly, the second washer 21 is provided with second inner teeth 211, and the second roller 221 is provided with second outer teeth 2211, and the second inner teeth 211 are meshed and connected with the second outer teeth 2211, so that the rotation of the second roller 221 can drive the second washer 21 to run synchronously. For the specific design principle and structure, refer to the first rolling assembly 1, and no detailed description is given.

[0051] Optionally, combined Figure 2 and Figure 4 As shown, the width D1 of the first gasket 11 and / or the second gasket 21 is not less than the width D2 of the pole piece 3, so that the pole piece 3 can be covered by the first gasket 11 and / or the second gasket 21 when passing through the first gasket 11 and the second gasket 21. On the one hand, it can ensure that the entire coating area 31 of the pole piece 3 is rolled, and on the other hand, the pole ear area 32 of the pole piece 3 is also located between the first gasket 11 and the second gasket 21. The first gasket 11 and the second gasket 21 limit the pole ear area 32, thereby preventing the pole ear area 32 from bending.

[0052] Optionally, the thickness of the first washer 11 and / or the second washer 21 is greater than 10 mm to ensure that the first washer 11 and / or the second washer 21 still has sufficient structural strength after the inner teeth are processed. The first washer 11 and the second washer 21 can be made of metal materials, such as aluminum alloy or steel, etc., which have a certain hardness and structural strength to mesh with the rollers for transmission, and have a certain bending and deformation ability after being processed into thin sheets, so that they can rotate around the roller group.

[0053] In order to be able to roll-press pole pieces 3 of different thicknesses, the spacing between the first gasket 11 and the second gasket 21 is designed to be adjustable, so that pole pieces 3 of different thicknesses can all pass through the rolling channel.

[0054] In order to adjust the distance between the first gasket 11 and the second gasket 21, the first roller set 12 and / or the second roller set 22 can be moved and adjusted in the thickness direction of the pole piece 3, and the gap size between the first gasket 11 and the second gasket 21 is changed by moving the first roller set 12 and the second roller set 22 closer to or away from each other.

[0055] In order to facilitate the adjustment of the first roller set 12, the battery pole sheet rolling device further includes a bracket (not shown in the figure), and each first roller 121 is rotatably arranged on the bracket, and the bracket can be adjusted up and down to achieve the overall up and down movement of each first roller set 12. Similarly, the second roller set 22 can also be rotatably arranged on another bracket to move the second roller set 22 as a whole.

[0056] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Battery pole sheet rolling device, characterized in that: include: A first rolling assembly (1) comprises a first washer (11) and a first roller set (12), wherein the first roller set (12) comprises at least two first rollers (121), the at least two first rollers (121) are arranged in the first washer (11) at intervals to tension the first washer (11), and the first rollers (121) are capable of driving the first washer (11) to rotate; A second rolling assembly (2), comprising a second washer (21) and a second roller set (22), wherein the second roller set (22) comprises at least two second rollers (221), the at least two second rollers (221) being arranged in the second washer (21) at intervals to tension the second washer (21), and the second rollers (221) are capable of driving the second washer (21) to rotate; A rolling channel is formed between the first gasket (11) and the second gasket (21), and the pole piece (3) to be rolled can pass through the rolling channel, and the pole piece (3) is in contact with the first gasket (11) and the second gasket (21), and at least one of the first roller (121) and the second roller (221) is aligned to roll the pole piece (3).

2. The battery pole sheet rolling device according to claim 1, characterized in that: At least two of the first rollers (121) are arranged in one-to-one alignment with the second rollers (221).

3. The battery pole sheet rolling device according to claim 1, characterized in that: The first washer (11) is provided with first internal teeth (111), the first roller (121) is provided with first external teeth (1211), the first internal teeth (111) meshing with the first external teeth (1211), so that the rotation of the first roller (121) can drive the first washer (11) to run synchronously; and / or, The second washer (21) is provided with second internal teeth (211), and the second roller (221) is provided with second external teeth (2211), and the second internal teeth (211) are meshed with the second external teeth (2211), so that the rotation of the second roller (221) can drive the second washer (21) to run synchronously.

4. The battery pole sheet rolling device according to claim 1, characterized in that: The width D1 of the first gasket (11) and / or the second gasket (21) is not less than the width D2 of the pole piece (3), so that the pole piece (3) can be covered by the first gasket (11) and / or the second gasket (21) when passing through the first gasket (11) and the second gasket (21).

5. The battery pole sheet rolling device according to claim 1, characterized in that: The thickness of the first gasket (11) and / or the second gasket (21) is greater than 10 mm.

6. The battery pole sheet rolling device according to any one of claims 1 to 5, characterized in that: The distance between the first gasket (11) and the second gasket (21) can be adjusted so that the pole pieces (3) of different thicknesses can all pass through the rolling channel.

7. The battery pole sheet rolling device according to claim 6, characterized in that: The first roller set (12) and / or the second roller set (22) are capable of being moved and adjusted in the thickness direction of the pole piece (3).

8. The battery pole sheet rolling device according to any one of claims 1 to 5, characterized in that: The pole piece (3) is released from the unwinding shaft (4), rolled by the battery pole piece rolling device, and then wound onto the winding shaft (5), and the two ends of the first gasket (11) and the second gasket (21) extend toward the unwinding shaft (4) and the winding shaft (5) respectively, and maintain a preset gap with the unwinding shaft (4) and the winding shaft (5).

9. The battery pole sheet rolling device according to any one of claims 1 to 5, characterized in that: The first roller (121) and the second roller (221) arranged opposite to each other have the same diameter.

10. The battery pole sheet rolling device according to any one of claims 1 to 5, characterized in that: At least two of the first rollers (121) have different diameters, the first roller (121) with the largest diameter is connected to a first driving member, and the first driving member is used to drive the first roller (121) to rotate; and / or, At least two of the second rollers (221) have different diameters, and the second roller (221) with the largest diameter is connected to a second driving member, and the second driving member is used to drive the second roller (221) to rotate.

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