Device for releasing stress of pole piece and diaphragm in coiling process

Abstract

The utility model relates to the technical field of a lithium battery coiling process, in particular to a pole piece and diaphragm stress release device for a coiling process. Comprising a positive plate, a first diaphragm, a negative plate and a second diaphragm which are arranged on the surface of a workbench, a heating bin is fixed to the surface of the workbench, fan blades are arranged on the surface of the bottom in the heating bin, a second motor is fixed to the surface of the workbench, and a winding roller is arranged at the output end of the second motor; a telescopic rod is fixed to the surface of the bottom of the vibration supporting frame, the outer surface of the telescopic rod is movably sleeved with a movable sleeve, a transmission block is movably arranged at the bottom of the movable sleeve, and a rotating rod is movably arranged at the end of the transmission block. The evaporated water is blown out through the opening in the upper end of the heating bin by matching with the fan blades, so that the water is prevented from being adsorbed into the pole piece and the diaphragm again, and the internal stress of the pole piece and the diaphragm is released.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery winding process technology, specifically a stress relief device for electrode sheets and separators in a winding process. Background Technology

[0002] A lithium battery is an electrochemical system containing lithium, including metallic lithium, lithium alloys, lithium ions, and lithium polymers.

[0003] In existing technologies, in order to improve the energy density and safety of lithium batteries, it is often necessary to wind the electrode sheets. In order to prevent the positive and negative electrode sheets from directly contacting each other and causing a short circuit, the positive and negative electrode sheets need to be separated by a separator during winding. The microporous structure of the separator allows ions to pass through, ensuring the normal operation of the battery. When the electrode sheets and separator are wound together, they need to be heated to remove the moisture inside the electrode sheets, thereby reducing internal stress and reducing deformation resistance.

[0004] However, existing stress relief devices involve winding the electrode and separator together and placing them into an aluminum casing before heating them. Since the aluminum casing is sealed, it is difficult to completely remove the moisture generated by heating the electrode, which affects the quality of the lithium battery. Utility Model Content

[0005] The purpose of this invention is to provide a stress relief device for electrode sheets and diaphragms in wire winding processes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a stress relief device for electrode sheets and diaphragms in a wire winding process, the stress relief device comprising:

[0007] A workbench, the surface of which is provided with a positive electrode plate, a first diaphragm, a negative electrode plate and a second diaphragm, a heating chamber fixed on the surface of the workbench, a fan blade provided on the bottom surface inside the heating chamber, a second motor fixed on the surface of the workbench, and a take-up roller provided at the output end of the second motor;

[0008] A vibration support frame is provided with a support roller movably mounted on its inner surface, a telescopic rod is fixed on the bottom surface of the vibration support frame, a movable sleeve is movably mounted on the outer surface of the telescopic rod, a transmission block is movably mounted at the bottom of the movable sleeve, and a rotating rod is movably mounted at the end of the transmission block.

[0009] Preferably, the positive electrode, the first diaphragm, the negative electrode, and the second diaphragm are on the same vertical line, the tension roller is movably provided on the surface of the worktable, the vibration support frame is movably provided on the surface of the worktable, and the positive electrode, the vibration support frame, the heating chamber, the tension roller, and the winding roller are distributed on the surface of the worktable from left to right.

[0010] Preferably, a fixed support frame is fixed to the surface of the workbench, the rotating rod moves through the inner wall of the fixed support frame, and a first motor is provided at the end of the rotating rod.

[0011] Preferably, a dryer is fixed to the outer surface of the heating chamber, and a first spring is fixed to the lower surface of the vibration support frame, with the other end of the first spring fixed to the surface of the worktable.

[0012] Preferably, a second spring is movably sleeved on the outer surface of the telescopic rod, and the telescopic rod and the second spring are movably located inside the movable sleeve.

[0013] Preferably, the positive electrode sheet, the first diaphragm, the negative electrode sheet, and the second diaphragm pass through a support roller, a heating chamber, a tension roller, and a take-up roller, respectively.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The vibration of the vibrating support frame causes the positive electrode, first separator, negative electrode, and second separator on its surface to vibrate through the support rollers. This shakes off the dust adsorbed on the electrode and separator surfaces, preventing dust from affecting the quality of the lithium battery electrode winding. The increased temperature evaporates the moisture inside the electrode and separator, and the evaporated moisture is blown out through the opening at the top of the heating chamber by the fan blades, preventing the moisture from being re-adsorbed into the electrode and separator. This releases the internal stress of the electrode and separator. At the same time, rotating the tension roller can adjust the tension of the electrode and separator before winding, preventing the electrode and separator from becoming loose during winding due to insufficient tension. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the workbench structure of this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the winding assembly structure of this utility model;

[0020] Figure 5 This is a three-dimensional schematic diagram of the vibration component structure of this utility model;

[0021] Figure 6 This is an exploded three-dimensional schematic diagram of the vibration component structure of this utility model;

[0022] Figure 7 This is a three-dimensional schematic diagram of the tension roller structure of this utility model.

[0023] In the diagram: 1. Workbench; 2. Positive electrode plate; 3. First diaphragm; 4. Negative electrode plate; 5. Second diaphragm; 6. Vibration support frame; 7. Heating chamber; 8. Dryer; 9. Tension roller; 10. Take-up roller; 11. Fan blade; 12. First spring; 13. Fixed support frame; 14. First motor; 15. Second motor; 16. Support roller; 17. Movable sleeve; 18. Transmission block; 19. Rotating rod; 20. Telescopic rod; 21. Second spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1: Please refer to Figures 1 to 7 This utility model provides a technical solution: a stress relief device for electrode and diaphragm in a winding process. The workbench 1 is provided with a positive electrode 2, a first diaphragm 3, a negative electrode 4, and a second diaphragm 5. A heating chamber 7 is fixed on the surface of the workbench 1. The bottom surface of the heating chamber 7 is provided with fan blades 11. When the temperature rises, the moisture in the electrode and diaphragm will evaporate. The fan blades 11 will blow the evaporated moisture out through the opening at the top of the heating chamber 7, preventing the moisture from being reabsorbed into the electrode and diaphragm, thereby releasing the internal stress of the electrode and diaphragm. A second motor 15 is fixed on the surface of the workbench 1. A take-up roller 10 is provided at the output end of the second motor 15.

[0026] A support roller 16 is movably provided on the inner surface of the vibration support frame 6, and a telescopic rod 20 is fixed on the bottom surface of the vibration support frame 6. A movable sleeve 17 is movably sleeved on the outer surface of the telescopic rod 20. A transmission block 18 is movably provided at the bottom of the movable sleeve 17, and a rotating rod 19 is movably provided at the end of the transmission block 18. When the vibration support frame 6 vibrates, the support roller 16 will cause the positive electrode 2, the first diaphragm 3, the negative electrode 4, and the second diaphragm 5 on their surfaces to vibrate, thereby shaking off the dust adsorbed on the surfaces of the positive electrode 2, the first diaphragm 3, the negative electrode 4, and the second diaphragm 5, and avoiding the impact of dust on the quality of the lithium battery electrode winding.

[0027] Based on Embodiment 1, the positive electrode 2, the first diaphragm 3, the negative electrode 4, and the second diaphragm 5 are on the same vertical line. The tension roller 9 is movably provided on the surface of the worktable 1, and the vibration support frame 6 is movably provided on the surface of the worktable 1. The positive electrode 2, the vibration support frame 6, the heating chamber 7, the tension roller 9, and the winding roller 10 are distributed from left to right on the surface of the worktable 1.

[0028] A fixed support frame 13 is fixed on the surface of the workbench 1. The rotating rod 19 moves and rubs against the inner wall of the fixed support frame 13. A first motor 14 is provided at the end of the rotating rod 19. A dryer 8 is fixed on the outer surface of the heating chamber 7. A first spring 12 is fixed on the lower surface of the vibration support frame 6. The other end of the first spring 12 is fixed to the surface of the workbench 1. Since the vibration support frame 6 is supported by the first spring 12 in a balanced state, the vibration support frame 6 absorbs energy when it moves up and down due to the elasticity of the first spring 12, causing the vibration support frame 6 to vibrate.

[0029] The telescopic rod 20 is movably fitted with a second spring 21 on its outer surface. The telescopic rod 20 and the second spring 21 are movably located inside the movable sleeve 17. When the movable sleeve 17 moves downward, it will pressurize the second spring 21 to pull the vibration support frame 6 downward. The positive electrode 2, the first diaphragm 3, the negative electrode 4 and the second diaphragm 5 pass through the support roller 16, the heating chamber 7, the tension roller 9 and the winding roller 10, respectively.

[0030] Specifically, when winding the electrode sheet, the second motor 15 is started to drive the winding core to rotate and pull the positive electrode sheet 2, the first diaphragm 3, the negative electrode sheet 4 and the second diaphragm 5 to the right. The first motor 14 is started to drive the rotating rod 19 to rotate. Since the connection between the rotating rod 19 and the transmission block 18 is not on the same axis as the first motor 14, the rotating rod 19 will pull the movable sleeve 17 up and down through the transmission block 18 when it rotates.

[0031] When the movable sleeve 17 moves downward, it will pressurize the second spring 21 to pull the vibration support frame 6 downward. When the movable sleeve 17 moves upward, it will support the vibration support frame 6 to move upward through the upper surface. Since the vibration support frame 6 is supported by the first spring 12 in the balanced state, due to the elasticity of the first spring 12, the up and down movement of the vibration support frame 6 will absorb energy, causing the vibration support frame 6 to vibrate.

[0032] When the vibration support frame 6 vibrates, the positive electrode 2, the first separator 3, the negative electrode 4 and the second separator 5 on its surface will vibrate through the support roller 16, thereby shaking off the dust adsorbed on the surface of the positive electrode 2, the first separator 3, the negative electrode 4 and the second separator 5, so as to avoid the dust affecting the quality of the lithium battery electrode winding.

[0033] After the dust is removed, the positive electrode 2, the first separator 3, the negative electrode 4, and the second separator 5 will be heated in the heating chamber 7. The increased temperature will evaporate the moisture in the electrode and separator, and the evaporated moisture will be blown out through the opening at the top of the heating chamber 7 by the fan blade 11, so as to prevent the moisture from being reabsorbed into the electrode and separator, thereby releasing the internal stress of the electrode and separator.

[0034] The electrode and diaphragm in the heating chamber 7 will be attracted together and wound up by the winding roller 10. At the same time, rotating the tension roller 9 can adjust the tension of the electrode and diaphragm before winding, so as to avoid the electrode and diaphragm from becoming loose during winding due to insufficient tension.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stress relief device for electrode sheets and diaphragms in a wire winding process, characterized in that: The stress relief device for the wire-wound electrode and diaphragm includes: A workbench (1) is provided with a positive electrode plate (2), a first diaphragm (3), a negative electrode plate (4) and a second diaphragm (5) on its surface. A heating chamber (7) is fixed on the surface of the workbench (1). A fan blade (11) is provided on the bottom surface inside the heating chamber (7). A second motor (15) is fixed on the surface of the workbench (1). A take-up roller (10) is provided at the output end of the second motor (15). Vibration support frame (6), the inner surface of the vibration support frame (6) is movably provided with support roller (16), the bottom surface of the vibration support frame (6) is fixed with telescopic rod (20), the outer surface of the telescopic rod (20) is movably fitted with movable sleeve (17), the bottom of the movable sleeve (17) is movably provided with transmission block (18), and the end of the transmission block (18) is movably provided with rotating rod (19).

2. The stress relief device for electrode sheets and diaphragms in a wire winding process according to claim 1, characterized in that: The positive electrode (2), the first diaphragm (3), the negative electrode (4) and the second diaphragm (5) are on the same vertical line. The tension roller (9) is movably provided on the surface of the worktable (1). The vibration support frame (6) is movably provided on the surface of the worktable (1). The positive electrode (2), the vibration support frame (6), the heating chamber (7), the tension roller (9) and the winding roller (10) are distributed from left to right on the surface of the worktable (1).

3. The stress relief device for electrode sheets and diaphragms in a winding process according to claim 2, characterized in that: The workbench (1) is fixed with a fixed support frame (13), the rotating rod (19) moves through the inner wall of the fixed support frame (13), and the end of the rotating rod (19) is provided with a first motor (14).

4. The stress relief device for electrode sheets and diaphragms in a wire winding process according to claim 3, characterized in that: A dryer (8) is fixed to the outer surface of the heating chamber (7), and a first spring (12) is fixed to the lower surface of the vibration support frame (6). The other end of the first spring (12) is fixed to the surface of the workbench (1).

5. The stress relief device for electrode sheets and diaphragms in a wire winding process according to claim 4, characterized in that: The telescopic rod (20) is movably fitted with a second spring (21) on its outer surface, and the telescopic rod (20) and the second spring (21) are movably located inside the movable sleeve (17).

6. The stress relief device for electrode sheets and diaphragms in a wire winding process according to claim 5, characterized in that: The positive electrode (2), the first diaphragm (3), the negative electrode (4), and the second diaphragm (5) pass through the support roller (16), the heating chamber (7), the tension roller (9), and the winding roller (10), respectively.

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