Sheet feeding tension compensation mechanism

Abstract

The utility model relates to a piece feeding tension compensation mechanism, which is used for transferring a positive pole piece or a negative pole piece to a winding needle, and comprises a process deviation rectifying component, a main driving roller, a clamping compensation component, a cutter component and a linear driving component, the linear driving component drives the clamping compensation component and the cutter component to move, and the process deviation rectifying component is used for rectifying the process deviation of the positive pole piece or the negative pole piece. After the process deviation rectifying assembly rectifies a pole piece, the pole piece sequentially passes through the clamping compensation assembly and the cutter assembly, the main driving roller conveys the pole piece to a winding needle, the cutter assembly cuts off the pole piece, and the clamping compensation assembly conducts tension compensation on the pole piece and transfers the pole piece to the main driving roller. According to the piece feeding tension compensation mechanism, the compensation unit is arranged in the clamping compensation assembly, tension compensation can be conducted in the piece feeding process after the pole piece is cut off, the pole piece can be kept tensioned after being cut off, the probability that the pole piece is fed to the main driving roller to slip after being cut off is reduced, and the piece feeding precision of the pole piece feeding mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a sheet feeding tension compensation mechanism. Background Art

[0002] With the improvement of people's material living standards, various portable electronic devices have been widely used, and people's requirements for battery performance are getting higher and higher. The quality of the winding of the battery cell pole pieces directly determines the performance indicators of the battery. Therefore, higher requirements are also placed on the equipment for winding the battery cell pole pieces.

[0003] At present, in the production process of wound battery cells, the winding core is used as the starting point. The positive and negative electrode sheets are separated by means of a diaphragm and then stacked to form a electrode sheet strip, which is then wound layer by layer in the same direction. However, the electrode sheet that is corrected to the main drive roller is not driven by power. The excessive length of the electrode sheet causes the traction force of the main drive roller to not match the tension of the electrode sheet. The traction force is less than the tension, causing the main drive roller to slip. The main drive roller cannot guarantee the correction amount, and the low accuracy of the sheet entry leads to abnormalities in the rolled battery cell. Utility Model Content

[0004] The main purpose of the utility model is to provide a feeding tension compensation mechanism to solve the above technical problems. After the pole piece is cut, the pole piece can be clamped and the tension of the pole piece can be adjusted.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sheet feeding tension compensation mechanism is used to transfer a positive electrode sheet or a negative electrode sheet to a winding needle, comprising a process correction component, a main drive roller, a clamping compensation component, a cutter component and a linear drive component. The linear drive component drives the clamping compensation component and the cutter component to move. After the process correction component corrects the electrode sheet, the main drive roller transfers the electrode sheet to the winding needle after passing through the clamping compensation component and the cutter component in sequence. The cutter component cuts the electrode sheet, and the clamping compensation component performs tension compensation on the electrode sheet and transfers it to the main drive roller.

[0007] As a preferred technical solution, the clamping compensation assembly includes a clamping base plate, a compensation unit, a fixed clamping plate and a movable clamping plate unit, the fixed clamping plate is installed on the clamping base plate, the movable clamping plate unit moves relative to the fixed clamping plate, and the compensation unit is installed between the fixed clamping plate and the movable clamping plate unit.

[0008] As a preferred technical solution, the movable clamp unit includes a clamping cylinder, a guide shaft connecting block, a guide structure, a movable clamp, a clamp cam and a clamp cam track. The movable clamp is fixed to the guide shaft connecting block through the guide structure, the clamp cam is fixed to the movable clamp, the clamp cam abuts against the clamp cam track, and the clamping cylinder drives the guide shaft connecting block to move.

[0009] As a preferred technical solution, the compensation unit includes a compensation motor, a driving wheel, a driven wheel, a belt, a fixed roller and a movable roller, the movable roller is installed on the fixed clamping plate, the fixed roller is installed on the movable clamping plate, the driven wheel is fixed to one end of the movable roller, the driving wheel is connected to the driven wheel through the belt, and the compensation motor drives the driving wheel to rotate.

[0010] As a preferred technical solution, the cutter assembly includes a cutter mounting seat, a cutter cylinder, a pressure plate, a movable knife mounting seat, a fixed knife, a movable knife, a cutter cam and a cam track; the fixed knife and the cutter cylinder are fixed on the cutter mounting seat, the pressure plate, the movable knife and the cutter cam are installed on the movable knife mounting seat, the cutter cylinder drives the movable knife mounting seat to move, and the cutter cam abuts against the cam track.

[0011] As a preferred technical solution, the linear drive assembly includes a drive bracket, a linear motor, a guide rail, a rack and a power-off brake. The linear motor is provided with a mover and a stator. The stator, the guide rail and the rack are fixed on the drive bracket. The power-off brake is fixed on the mover. The mover is respectively fixed to the clamping compensation assembly and the cutter assembly, and the power-off brake is engaged with the rack.

[0012] As a preferred technical solution, the linear drive assembly also includes a compensation buffer structure and a cutter buffer structure, and the compensation buffer structure and the cutter buffer structure are installed on the drive bracket.

[0013] As a preferred technical solution, the compensation buffer structure includes a compensation buffer cylinder and a compensation buffer block, and the compensation buffer cylinder drives the compensation buffer block to move.

[0014] As a preferred technical solution, the cutter buffer structure includes a cutter buffer cylinder and a cutter buffer block, and the cutter buffer cylinder drives the cutter buffer block to move.

[0015] The beneficial effect of the utility model is that the above-mentioned sheet feeding tension compensation mechanism is provided with a compensation unit in the clamping compensation assembly, which can perform tension compensation in the process of sheet feeding after the electrode sheet is cut off, so that the electrode sheet can be kept tensioned after cutting, reducing the chance of slipping of the electrode sheet from the cutting feed to the main driving roller, and improving its feeding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the sheet feeding tension compensation mechanism involved in the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the linear drive assembly involved in the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the cutter assembly involved in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the clamping compensation component involved in the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] like Figure 1 As shown, a film feeding tension compensation mechanism is used to transfer the positive electrode sheet or the negative electrode sheet to the winding needle, including a process correction component 1, a main driving roller 5, a clamping compensation component 3, a cutter component 4 and a linear driving component 2. The linear driving component 2 drives the clamping compensation component 3 and the cutter component 4 to move. After the process correction component 1 corrects the electrode sheet, it passes through the clamping compensation component 3 and the cutter component 4 in sequence. The main driving roller 5 transfers the electrode sheet to the winding needle for winding. The winding needle is wound, and the cutter component 4 cuts the electrode sheet. The clamping compensation component 3 performs tension compensation on the electrode sheet and transfers it to the main driving roller 5 to start the next winding.

[0022] like Figure 2As shown, the linear drive assembly 2 includes a drive bracket 21, a linear motor, a compensation buffer structure 26, a cutter buffer structure 27, a guide rail 28, a rack 29 and a power-off brake 25. The linear motor includes a first mover 23, a second mover 24 and a stator 22. The stator 22, the compensation buffer structure 26, the cutter buffer structure 27, the guide rail 28 and the rack 29 are fixed on the drive bracket 21. The power-off brake 25 is fixed on the first mover 23 and the second mover 24. The second mover 24 is fixed to the clamping compensation assembly 3. The first mover 23 is fixed to the cutter assembly 4 is fixed, the power-off brake 25 is meshed with the rack 29, the first mover 23 moves along the stator 22, driving the cutter assembly 4 to move, when the first mover 23 needs to stop, the power-off brake 25 starts to cut off the power, and brakes by meshing with the rack 29, the cutter assembly 4 abuts against the cutter buffer structure 27 to decelerate, the second mover 24 moves along the stator 22, driving the clamping compensation assembly 3 to move, when the second mover 24 needs to stop, the power-off brake 25 starts to cut off the power, and brakes by meshing with the rack 29, the clamping compensation assembly 3 abuts against the compensation buffer structure 26 to decelerate. The compensation buffer structure 26 includes a compensation buffer cylinder 261 and a compensation buffer block 262, the compensation buffer cylinder 261 drives the compensation buffer block 262 to move, the compensation buffer block 262 abuts against the clamping compensation assembly 3, and the compensation buffer cylinder 261 is compressed and contracted for buffering. The cutter buffer structure 27 includes a cutter buffer cylinder 271 and a cutter buffer block 272. The cutter buffer cylinder 271 drives the cutter buffer block 272 to move, and the cutter buffer block 272 abuts against the cutter assembly 4. The cutter buffer cylinder 271 is compressed and contracted for buffering.

[0023] like Figure 3 As shown, the cutter assembly 4 includes a cutter mounting seat 41, a cutter cylinder 45, a pressure plate 44, a movable knife mounting seat 43, a fixed knife 42, a movable knife 46, a cutter cam 47, a cam track 48 and a dust suction pipe 49. The fixed knife 42 and the cutter cylinder 45 are fixedly mounted on the cutter mounting seat 41, the pressure plate 44, the movable knife 46 and the cutter cam 47 are mounted on the movable knife mounting seat 43, the cam track 48 is fixedly mounted on the driving bracket 21, and the first mover 23 is along the stator 2 2 moves, driving the cutter assembly 4 to move, so that the cutter cam 47 abuts against the cam track 48, and the cutter cam 47 moves along the surface of the cam track 48, driving the movable knife mounting seat 43 to move, so that the movable knife 46 moves relative to the fixed knife 42, thereby cutting the pole piece, and the cutter cylinder 45 drives the movable knife mounting seat 43 to move, so that the movable knife 46 is reset, and the dust suction pipe 49 is installed on the pressing plate 44 and the cutter mounting seat 41, and is used to absorb the dust generated during cutting.

[0024] like Figure 4As shown, the clamping compensation assembly 3 includes a clamping base plate 31, a compensation unit 34, a fixed clamp plate 32, a movable clamp plate unit 33 and a guide plate 35. The fixed clamp plate 32 is installed on the clamping base plate 31, the movable clamp plate unit 33 moves relative to the fixed clamp plate 32, and the compensation unit 34 and the guide plate 35 are installed between the fixed clamp plate 32 and the movable clamp plate unit 33. The movable clamping plate unit 33 includes a clamping cylinder 331, a guide shaft connecting block 332, a guide structure 336, a movable clamping plate 333, a clamping plate cam 334 and a clamping plate cam track 335. The movable clamping plate 333 is fixed to the guide shaft connecting block 332 through the guide structure 336. The clamping plate cam 334 is fixed on the movable clamping plate 333. The clamping plate cam track 335 is fixed on the driving bracket 21. The clamping plate cam 335 abuts against the clamping plate cam track 335. The second mover 24 moves along the stator 22, driving the clamping compensation assembly 3 to move, so that the clamping plate cam 335 leaves the clamping plate cam track 335. The clamping cylinder 331 drives the guide shaft connecting block 332 to move, so that the movable clamping plate 333 moves relative to the fixed clamping plate 32, thereby clamping the pole piece. The guide plate 35 is installed on the fixed clamping plate 32 and the movable clamping plate 333, and is used to guide the pole piece to between the fixed clamping plate 32 and the movable clamping plate 333. The compensation unit 34 includes a compensation motor 341, a driving wheel 342, a driven wheel 344, a belt 343, a fixed roller 346 and a movable roller 345. The movable roller 345 is installed on the fixed clamping plate 32, the fixed roller 346 is installed on the movable clamping plate 333, the driven wheel 344 is fixed to one end of the movable roller 345, the driving wheel 342 is connected to the driven wheel 344 through the belt 343, and the compensation motor 341 drives the driving wheel 342 to rotate, thereby driving the pole piece transmission to adjust the tension of the pole piece.

[0025] The above-described embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent application scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A sheet feeding tension compensation mechanism, used for transferring a positive electrode sheet or a negative electrode sheet to a winding needle, characterized in that: It includes a process correction component, a main driving roller, a clamping compensation component, a cutter component and a linear driving component. The linear driving component drives the clamping compensation component and the cutter component to move. After the process correction component corrects the pole piece, it passes through the clamping compensation component and the cutter component in sequence. The main driving roller transfers the pole piece to the winding needle, the cutter component cuts the pole piece, and the clamping compensation component compensates the tension of the pole piece and transfers it to the main driving roller.

2. The sheet feeding tension compensation mechanism according to claim 1, characterized in that: The clamping and compensating assembly includes a clamping base plate, a compensation unit, a fixed clamping plate and a movable clamping plate unit. The fixed clamping plate is installed on the clamping base plate, the movable clamping plate unit moves relative to the fixed clamping plate, and the compensation unit is installed between the fixed clamping plate and the movable clamping plate unit.

3. The sheet feeding tension compensation mechanism according to claim 2, characterized in that: The movable clamping plate unit includes a clamping cylinder, a guide shaft connecting block, a guide structure, a movable clamping plate, a clamping plate cam and a clamping plate cam track. The movable clamping plate is fixed to the guide shaft connecting block through the guide structure, the clamping plate cam is fixed to the movable clamping plate, the clamping plate cam abuts against the clamping plate cam track, and the clamping cylinder drives the guide shaft connecting block to move.

4. The sheet feeding tension compensation mechanism according to claim 3, characterized in that: The compensation unit includes a compensation motor, a driving wheel, a driven wheel, a belt, a fixed roller and a movable roller. The movable roller is installed on the fixed clamping plate, the fixed roller is installed on the movable clamping plate, the driven wheel is fixed to one end of the movable roller, the driving wheel is connected to the driven wheel through the belt, and the compensation motor drives the driving wheel to rotate.

5. The sheet feeding tension compensation mechanism according to claim 1, characterized in that: The cutter assembly includes a cutter mounting seat, a cutter cylinder, a pressure plate, a movable knife mounting seat, a fixed knife, a movable knife, a cutter cam and a cam track. The fixed knife and the cutter cylinder are fixed on the cutter mounting seat, the pressure plate, the movable knife and the cutter cam are installed on the movable knife mounting seat, the cutter cylinder drives the movable knife mounting seat to move, and the cutter cam abuts against the cam track.

6. The sheet feeding tension compensation mechanism according to claim 1, characterized in that: The linear drive assembly includes a drive bracket, a linear motor, a guide rail, a rack and a power-off brake. The linear motor is provided with a mover and a stator. The stator, the guide rail and the rack are fixed on the drive bracket. The power-off brake is fixed on the mover. The mover is respectively fixed to the clamping compensation assembly and the cutter assembly, and the power-off brake is engaged with the rack.

7. The sheet feeding tension compensation mechanism according to claim 6, characterized in that: The linear drive assembly also includes a compensation buffer structure and a cutter buffer structure, and the compensation buffer structure and the cutter buffer structure are installed on the drive bracket.

8. The sheet feeding tension compensation mechanism according to claim 7, characterized in that: The compensation buffer structure includes a compensation buffer cylinder and a compensation buffer block, and the compensation buffer cylinder drives the compensation buffer block to move.

9. The sheet feeding tension compensation mechanism according to claim 7, characterized in that: The cutter buffer structure comprises a cutter buffer cylinder and a cutter buffer block, and the cutter buffer cylinder drives the cutter buffer block to move.

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