Pole piece cutting device

Abstract

The utility model provides a pole piece cutting device which comprises a cutting unit and a conveying unit arranged on the downstream of the cutting unit. The cutting unit comprises a cutting mechanism for cutting the pole piece to a preset length, and a feeding mechanism arranged at the downstream of the cutting mechanism and used for conveying the cut pole piece to the conveying unit; the multiple sets of cutting units are arranged side by side, the cutting units alternately convey the cut pole pieces to the conveying unit, and the conveying unit conveys the cut pole pieces to the next procedure. According to the pole piece cutting device, the multiple groups of cutting units are arranged side by side, the cutting units alternately convey the cut pole pieces to the conveying unit, and if one cutting unit cuts the pole pieces, the other cutting units can convey the cut pole pieces to the conveying unit; and the conveying unit can continuously convey the cut pole pieces backwards, so that the production efficiency is improved.

Description

Technical Field

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

[0002] Lithium-ion batteries are widely used due to their high energy density, long service life, and green and pollution-free characteristics. In the production process of lithium-ion batteries, it is necessary to use a cutting device to cut the rolled pole pieces into individual pole pieces, and the cut pole pieces are transferred to the conveyor line, and then transported to the next process by the conveyor line to complete the cutting and unloading. However, the existing pole piece cutting device is limited by its own structure, which leads to the need to keep the material belt in a stopped state when cutting the pole pieces during the production process to ensure the accuracy of the cutting size. After the cutting is completed, the pole piece is continued to be transported backwards. In this way, the subsequent conveyor line also needs to stop running during the process of the cutting device cutting the material belt, thereby limiting the further improvement of the pole piece production efficiency. Utility Model Content

[0003] In view of this, the utility model aims to provide a pole piece cutting device to improve production efficiency.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A pole piece cutting device comprises a cutting unit and a conveying unit arranged downstream of the cutting unit;

[0006] The cutting unit includes a cutting mechanism for cutting the electrode piece to a preset length, and a feeding mechanism disposed downstream of the cutting mechanism and feeding the cut electrode piece to the feeding unit;

[0007] The cutting units are arranged in a plurality of groups side by side, and each group of the cutting units alternately conveys the cut electrode sheets to the conveying unit, and the conveying unit conveys the cut electrode sheets to the next process.

[0008] Furthermore, the cutting mechanism includes a cutter assembly for cutting the pole piece, a feeding roller arranged upstream of the cutter assembly and conveying the pole piece to the cutter assembly, and a unloading roller arranged between the cutter assembly and the feeding mechanism.

[0009] Furthermore, the cutter assembly includes a pressing member and a cutter;

[0010] The pressing member can be driven to approach the pole piece and press the pole piece;

[0011] The cutter can be driven close to the pole piece to cut the pole piece.

[0012] Furthermore, the cutter assembly further comprises a first driving member, and a pressing member and a cutter 101 provided at a power output end of the first driving member;

[0013] The pressing member is slidably arranged at the power output end of the first driving member, and an elastic member is connected between the pressing member and the power output end.

[0014] Further, the feeding mechanism includes a first vacuum belt disposed downstream of the unloading nip roller, a transition nip roller disposed between the first vacuum belt and the conveying unit, a first support plate disposed between the first vacuum belt and the transition nip roller, and a second support plate disposed between the transition nip roller and the conveying unit;

[0015] The first supporting plate and the second supporting plate are used to support the bottom of the pole piece.

[0016] Further, the conveying unit includes a co-current nip roller, and a second vacuum belt disposed downstream of the co-current nip roller;

[0017] The second support plate is arranged between the parallel flow nip roller and the transition nip roller.

[0018] Furthermore, it also includes a feeding unit corresponding to each cutting unit, and each feeding unit supplies the electrode piece to the corresponding cutting unit;

[0019] The feeding unit comprises an unwinding mechanism for unwinding the pole piece, and a tape connection platform arranged between the unwinding mechanism and the cutting unit.

[0020] Furthermore, a dust removal mechanism, a tension swing roller and a deviation correction mechanism are arranged in sequence along the conveying direction of the pole piece between the tape connection platform and the cutting unit;

[0021] The dust removal mechanism and the deviation correction mechanism are arranged at intervals in the left-right direction, and the tension swing roller is located below the dust removal mechanism.

[0022] Furthermore, a buffer mechanism is provided between the deviation correction mechanism and the cutting unit;

[0023] The cache mechanism includes a second driving member and a cache roller disposed at a power output end of the second driving member. The second driving member can drive the cache roller to move, thereby lengthening or shortening the distance traveled by the pole piece from the deviation correction mechanism to the cutting unit.

[0024] Furthermore, the buffer mechanism and the deviation correction mechanism are arranged at intervals in the left-right direction;

[0025] The cutting unit is located above or below the buffer mechanism.

[0026] Compared with the prior art, the utility model has the following advantages:

[0027] The electrode cutting device described in the utility model arranges the cutting units into multiple groups arranged side by side, and each cutting unit alternately conveys the cut electrode sheets to the conveying unit. When one cutting unit cuts the electrode sheets, the remaining cutting units can convey the cut electrode sheets to the conveying unit, so that the conveying unit can continuously convey the cut electrode sheets backwards, which is beneficial to improving production efficiency.

[0028] In addition, by making the cutter assembly include a pressing member, the electrode piece can be pressed by the pressing member and then cut by the cutter 101, which can prevent the electrode piece from shaking during cutting, which is conducive to ensuring the accuracy of the cutting size. And the feeding mechanism includes a first vacuum belt, a transition clamping roller, a first support plate and a second tray, which has a simple structure and is convenient for arrangement, so that the electrode pieces cut by each group of cutting units can be transported to the conveying unit.

[0029] In addition, by providing a cache mechanism, when the cutting unit stops conveying the electrode sheet after cutting the electrode sheet, the components before the cache mechanism can still be in working state, which is beneficial to further improve production efficiency and reduce the power consumption of the electrode sheet cutting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0031] Figure 1 It is a structural schematic diagram of the pole piece cutting device according to an embodiment of the utility model;

[0032] Figure 2 It is a partial structural schematic diagram of the pole piece cutting device according to an embodiment of the utility model;

[0033] Figure 3 It is a structural schematic diagram of the cutting mechanism described in an embodiment of the utility model;

[0034] Figure 4 It is a partial structural schematic diagram of the feeding mechanism and the conveying unit according to the embodiment of the utility model;

[0035] Figure 5 It is a structural schematic diagram of the cache mechanism described in an embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 1. Cutting mechanism; 101. Cutter; 102. Pressing member; 103. First driving member; 104. Elastic member; 105. Feeding roller; 106. Unloading roller;

[0038] 2. Feeding mechanism; 201. First vacuum belt; 202. Transition clamping roller; 203. First support plate; 204. Second support plate;

[0039] 3. Conveying unit; 301. Transition clamping roller; 302. Second vacuum belt;

[0040] 4. Unwinding mechanism; 5. Belt splicing platform; 6. Dust removal mechanism; 7. Tension swing roller; 8. Correction mechanism; 9. Buffer roller; 10. Second driving member; 11. Tension detection roller; 12. Measuring roller; 13. Surface defect detection unit. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0044] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0045] This embodiment relates to a pole piece cutting device, the overall structure of which is as follows: Figure 1 and Figure 2As shown in the figure, the electrode sheet cutting device includes a cutting unit and a conveying unit 3 arranged downstream of the cutting unit. The cutting unit includes a cutting mechanism 1 for cutting the electrode sheet to a preset length, and a feeding mechanism 2 arranged downstream of the cutting mechanism 1 and conveying the cut electrode sheet to the conveying unit 3. The cutting units are arranged in multiple groups side by side, and each group of cutting units alternately conveys the cut electrode sheet to the conveying unit 3, and the conveying unit 3 conveys the cut electrode sheet to the next process.

[0046] It can be understood that in this embodiment, the cutting units are arranged in multiple groups side by side, and each cutting unit alternately conveys the cut electrode sheets to the conveying unit 3. If one of the cutting units cuts the electrode sheets, the remaining cutting units can convey the cut electrode sheets to the conveying unit 3, so that the conveying unit 3 can continuously convey the cut electrode sheets backward, which is beneficial to improving production efficiency.

[0047] Based on the above overall introduction, as a preferred implementation method, Figure 1 As shown in the figure, in the present embodiment, two groups of cutting units are arranged side by side up and down, and the two groups of cutting units jointly supply the cut electrode sheets to a subsequent group of conveying units 3, and when one cutting unit cuts the electrode sheets, the other cutting unit can supply the electrode sheets to the conveying unit 3.

[0048] As a preferred implementation method, Figure 2 As shown in the figure, the cutting mechanism 1 includes a cutter assembly for cutting the electrode piece, a feeding clamping roller 105 arranged upstream of the cutter assembly and conveying the electrode piece to the cutter assembly, and a feeding clamping roller 106 arranged between the cutter assembly and the feeding mechanism 2. Such a configuration has a simple structure and is easy to operate. After the electrode piece passes a preset length, the feeding clamping roller 105 and the feeding clamping roller 106 can stop moving, so that the cutter assembly cuts the electrode piece, and the feeding clamping roller 106 conveys it to the feeding mechanism 2.

[0049] As a preferred example, Figure 3 As shown in the figure, in this embodiment, the cutter assembly includes a pressing member 102 and a cutter 101. The pressing member 102 can be driven close to the pole piece and press the pole piece, and the cutter 101 can be driven close to the pole piece to cut the pole piece. By making the cutter assembly include the pressing member 102, the pole piece can be cut off by the cutter 101 after the pressing member 102 presses the pole piece, which can prevent the pole piece from shaking during cutting, which is conducive to ensuring the accuracy of the cutting size.

[0050] As a preferred embodiment, the cutter assembly also includes a first driving member 103, and a clamping member 102 and a cutter 101 arranged at the power output end of the first driving member 103. The clamping member 102 is slidably arranged at the power output end of the first driving member 103, and an elastic member 104 is connected between the clamping member 102 and the power output end. By making the clamping member 102 slidably arranged at the power output end of the first driving member 103, and providing an elastic member 104 between the clamping member 102 and the power output end, when the first driving member 103 drives the clamping member 102 and the cutter 101 to move, the clamping member 102 can achieve elastic pressing against the pole piece to avoid damage to the pole piece. And after the clamping member 102 presses the pole piece, the first driving member 103 can continue to drive the cutter 101 to move, so that the cutter 101 cuts off the pole piece.

[0051] In a specific implementation, the pressing member 102 may include a pressing block, and a connecting rod disposed on the pressing block and slidably connected to the power output end of the first driving member 103, and the elastic member 104 may be a spring sleeved on the connecting rod. The first driving member 103 may be a cylinder commonly used in the prior art. It should be noted that in this embodiment, only one driving member is used to drive the pressing member 102 and the cutter 101 to move at the same time, which is only a preferred implementation. In addition, in other embodiments, two driving members may be selected to drive the pressing member 102 and the cutter 101 to move respectively.

[0052] As a preferred embodiment, the feeding mechanism 2 includes a first vacuum belt 201 disposed downstream of the unloading clamping roller 106, a transition clamping roller 202 disposed between the first vacuum belt 201 and the conveying unit 3, a first support plate 203 disposed between the first vacuum belt 201 and the transition clamping roller 202, and a second support plate 204 disposed between the transition clamping roller 202 and the conveying unit 3. The first support plate 203 and the second support plate 204 are used to support the bottom of the electrode piece. Such a configuration is simple in structure, convenient for arrangement, and facilitates the conveying of the electrode pieces cut by each group of cutting units to the conveying unit 3.

[0053] As a preferred example, Figure 2 As shown in the figure, in this embodiment, the conveying unit 3 includes a parallel flow nip roller 301 and a second vacuum belt 302 arranged downstream of the parallel flow nip roller 301. The second support plate 204 is arranged between the parallel flow nip roller 301 and the transition nip roller 202. Such an arrangement facilitates the conveying unit 3 to receive the pole pieces conveyed from each cutting unit, and the pole pieces conveyed to the next process are all conveyed by one conveying unit 3, which is convenient for the subsequent process to take the material.

[0054] In the present embodiment, the electrode sheet cutting device further includes a feeding unit corresponding to each cutting unit, and each feeding unit supplies the electrode sheet to the corresponding cutting unit. The feeding unit includes an unwinding mechanism 4 for unwinding the electrode sheet, and a tape connection platform 5 provided between the unwinding mechanism 4 and the cutting unit. It can be understood that by providing the unwinding mechanism 4, it is convenient to unwind the electrode sheet, and by providing the tape connection platform 5, it is convenient to connect the replaced electrode sheet with the previous electrode sheet at the tape connection platform 5 when replacing the electrode sheet, without the need for threading operation, which is convenient for operation. It should be noted that the structures of the unwinding mechanism 4 and the tape connection platform 5 of the present embodiment can be set with reference to the relevant structures in the prior art, and will not be described in detail here.

[0055] As a preferred implementation method, Figure 1 As shown in the figure, in this embodiment, a dust removal mechanism 6, a tension swing roller 7 and a deviation correction mechanism 8 are arranged in sequence along the conveying direction of the pole piece between the tape connection platform 5 and the cutting unit. The dust removal mechanism 6 and the deviation correction mechanism 8 are arranged at intervals in the left-right direction, and the tension swing roller 7 is located below the dust removal mechanism 6. Such an arrangement facilitates full use of the space below the dust removal mechanism 6, is conducive to the compactness of the layout of the pole piece cutting device, and can reduce the size of the pole piece cutting device in the left-right direction, which is convenient for arrangement in the factory.

[0056] When implementing it, Figure 1 As shown in the figure, in this embodiment, the unwinding mechanism 4 is located at the far left, the conveying unit 3 is located at the far right, and the correcting mechanism 8 is located at the right side of the dust removal mechanism 6. Of course, in other embodiments, if the unwinding mechanism 4 is set at the far right and the conveying unit 3 is set at the far left, the correcting mechanism 8 can also be located at the left side of the dust removal mechanism 6. In addition, the correcting mechanism 8, the dust removal mechanism 6 and the tension swing roller 7 can all be selected from the related equipment commonly used in the prior art, and will not be described in detail here.

[0057] As a preferred implementation method, Figure 1 and Figure 5 As shown in , in this embodiment, a buffer mechanism is provided between the deflection correction mechanism 8 and the cutting unit. The buffer mechanism includes a second driving member 10 and a buffer roller 9 provided at the power output end of the second driving member 10. The second driving member 10 can drive the buffer roller 9 to move, thereby lengthening or shortening the distance traveled by the pole piece from the deflection correction mechanism 8 to the cutting unit.

[0058] By providing a cache mechanism, when the cutting unit cuts the electrode sheet and stops conveying the electrode sheet, the various components located before the cache mechanism can still continue to work. At this time, it is only necessary to adjust the position of the cache roller 9 to lengthen the distance traveled by the electrode sheet from the correction mechanism 8 to the cutting unit, and cache the excess electrode sheet at the cache roller 9.

[0059] After the cutting unit completes cutting and begins to transport the electrode piece, the buffer roller 9 can be returned to its original position to release the previously buffered electrode piece. This helps to further improve production efficiency and reduce the power consumption of the electrode piece cutting device. In addition, the second driving member 10 in this embodiment can be a linear module commonly used in the prior art, which will not be described in detail here.

[0060] As a preferred implementation, in this embodiment, the buffer mechanism and the correction mechanism 8 are arranged at intervals in the left-right direction. The cutting unit is located above or below the buffer mechanism. This arrangement is convenient for improving the compactness of the layout of the electrode cutting device and is conducive to reducing the size of the electrode cutting device in the left-right direction. Figure 1 As shown in , the buffer mechanism is arranged on the right side of the deflection correction mechanism 8, the upper row of cutting units are located below the buffer mechanism, and the lower row of cutting units are located above the buffer mechanism. At this time, when the buffer roller 9 is moved to the left, the distance traveled by the pole piece from the deflection correction mechanism 8 to the cutting unit can be shortened, and when the buffer roller 9 is moved to the right, the distance traveled by the pole piece from the deflection correction mechanism 8 to the cutting unit can be lengthened.

[0061] It is worth noting that the electrode cutting device of this embodiment may also include other components commonly used in the existing electrode conveying process, such as a tension detection roller 11 for detecting the surface tension of the electrode, a metering roller 12 for measuring the length traveled by the electrode, and a surface defect detection unit 13 for detecting surface defects of the electrode.

[0062] The electrode cutting device of this embodiment arranges the cutting units into multiple groups side by side, and each cutting unit alternately conveys the cut electrode sheets to the conveying unit 3. When one cutting unit cuts the electrode sheets, the remaining cutting units can convey the cut electrode sheets to the conveying unit 3. The conveying unit 3 can continuously convey the electrode sheets to the subsequent process, which is beneficial to improving production efficiency.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pole piece cutting device, characterized in that: It includes a cutting unit and a conveying unit arranged downstream of the cutting unit; The cutting unit includes a cutting mechanism for cutting the electrode piece to a preset length, and a feeding mechanism disposed downstream of the cutting mechanism and feeding the cut electrode piece to the feeding unit; The cutting units are arranged in a plurality of groups side by side, and each group of the cutting units alternately conveys the cut electrode sheets to the conveying unit, and the conveying unit conveys the cut electrode sheets to the next process.

2. The pole piece cutting device according to claim 1, characterized in that: The cutting mechanism includes a cutter assembly for cutting the pole piece, a feeding roller arranged upstream of the cutter assembly and conveying the pole piece to the cutter assembly, and a unloading roller arranged between the cutter assembly and the feeding mechanism.

3. The pole piece cutting device according to claim 2, characterized in that: The cutter assembly comprises a pressing member and a cutter; The pressing member can be driven to approach the pole piece and press the pole piece; The cutter can be driven close to the pole piece to cut the pole piece.

4. The pole piece cutting device according to claim 3, characterized in that: The cutter assembly further comprises a first driving member, and a pressing member and a cutter arranged at a power output end of the first driving member; The pressing member is slidably arranged at the power output end of the first driving member, and an elastic member is connected between the pressing member and the power output end.

5. The pole piece cutting device according to claim 2, characterized in that: The feeding mechanism comprises a first vacuum belt arranged downstream of the unloading nip roller, a transition nip roller arranged between the first vacuum belt and the conveying unit, a first support plate arranged between the first vacuum belt and the transition nip roller, and a second support plate arranged between the transition nip roller and the conveying unit; The first supporting plate and the second supporting plate are used to support the bottom of the pole piece.

6. The pole piece cutting device according to claim 5, characterized in that: The conveying unit includes a co-current nip roller and a second vacuum belt disposed downstream of the co-current nip roller; The second support plate is arranged between the parallel flow nip roller and the transition nip roller.

7. The pole piece cutting device according to claim 1, characterized in that: It also includes a feeding unit corresponding to each cutting unit, and each feeding unit supplies the electrode piece to the corresponding cutting unit respectively; The feeding unit comprises an unwinding mechanism for unwinding the pole piece, and a tape connection platform arranged between the unwinding mechanism and the cutting unit.

8. The pole piece cutting device according to claim 7, characterized in that: A dust removal mechanism, a tension swing roller and a deviation correction mechanism are arranged in sequence along the conveying direction of the pole piece between the tape connection platform and the cutting unit; The dust removal mechanism and the deviation correction mechanism are arranged at intervals in the left-right direction, and the tension swing roller is located below the dust removal mechanism.

9. The pole piece cutting device according to claim 8, characterized in that: A buffer mechanism is provided between the deviation correction mechanism and the cutting unit; The cache mechanism includes a second driving member and a cache roller disposed at a power output end of the second driving member. The second driving member can drive the cache roller to move, thereby lengthening or shortening the distance traveled by the pole piece from the deviation correction mechanism to the cutting unit.

10. The pole piece cutting device according to claim 9, characterized in that: The buffer mechanism and the deviation correction mechanism are arranged at intervals in the left-right direction; The cutting unit is located above or below the buffer mechanism.

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