Diaphragm-driven piece-type pole piece winding mechanism

Abstract

The utility model discloses a diaphragm driving piece type pole piece winding mechanism in the field of winding mechanisms, which comprises a base and two movable blocks capable of moving forwards, a guide plate used for conveying pole pieces is arranged above the base, a piece conveying table capable of moving towards the guide plate is arranged between the two movable blocks, and when the movable blocks move towards the base, the piece conveying table can move towards the guide plate. The piece feeding table moves synchronously with the guide plate, a rotatable pole piece passing roller is installed on the piece feeding table, a film passing roller arranged at the rear end of the piece feeding table is further installed between the two movable blocks, and a downward pressing assembly capable of moving up and down is further arranged above the piece feeding table. A pole piece is sequentially pressed and conveyed on the pole piece passing roller and the membrane passing roller, meanwhile, the membrane which is synchronously conveyed with the pole piece is additionally arranged on the membrane passing roller, the pole piece is driven by the membrane to be wound together, the waiting time can be shortened, the alignment degree of the pole piece and the membrane is improved, the production efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of winding mechanisms, in particular to a diaphragm driving a sheet-type pole piece into a winding mechanism. Background Art

[0002] Battery electrodes are an essential component of batteries. They directly participate in the battery's electrochemical reaction process and are key components in the battery's ability to store and release electrical energy. In modern battery systems such as lithium-ion batteries, electrodes typically include positive and negative electrodes.

[0003] During the winding process, it is usually necessary to stack the electrode and the diaphragm in a specific order and then wind them. The current way of winding the electrode is basically to rely on the winding needle on the winding mechanism to drive the electrode to rotate. In the method of using the winding needle to drive the electrode winding, in order to cooperate with the winding needle, the front end of the electrode needs to be set as a plain foil structure and cannot be processed by coating. Otherwise, the winding needle cannot drive the electrode to wind, which has high requirements on the electrode structure. Moreover, the front end of the electrode cannot be coated directly with a plain foil structure, which will reduce the capacity of the battery cell. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technical solutions, the utility model provides a diaphragm-driven sheet-type electrode winding mechanism, which can effectively solve the technical problem that the current electrode winding is basically driven by a winding needle, which affects the performance of the electrode.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The diaphragm drives the sheet-type electrode into the winding mechanism, which includes a base and two movable blocks that can move forward. A guide plate for conveying the electrode is provided above the base. A feeding platform that can move along the guide plate is installed between the two movable blocks. When the movable block moves toward the base, the feeding platform moves synchronously toward the guide plate.

[0007] The film feeding platform is equipped with a rotatable pole piece roller, and a film roller located at the rear end of the film feeding platform is also installed between the two movable blocks. A downward pressing component that can move up and down is also provided above the film feeding platform. The downward pressing component includes a downward pressing positioning member, a first mounting seat connected to one end of the downward pressing positioning member, and a second mounting seat connected to the other end of the downward pressing positioning member. The first mounting seat is equipped with a first downward pressing roller that can press down on the pole piece roller, and the second mounting seat is equipped with a second downward pressing roller that can press down on the film roller. The downward pressing positioning member is connected to one end of the second mounting seat by a second telescopic cylinder for adjusting the distance between the second downward pressing roller and the film roller.

[0008] Furthermore, the base is connected to one end of the movable block via a first linear guide rail, so that the movable block moves toward the base along the first linear guide rail.

[0009] Furthermore, the guide plate and one end of the film feeding platform are connected by a third linear guide rail, so that the film feeding platform moves toward the guide plate along the third linear guide rail. A first telescopic cylinder is also connected between the guide plate and the film feeding platform to control the movement of the film feeding platform on the third linear guide rail.

[0010] Furthermore, the movable block is equipped with a correction sensor for detecting the position of the pole piece on the film feeding platform. A cross bar passing through the inside of the film feeding platform is connected between the two movable blocks, so that the film feeding platform can move left and right along the cross bar. The guide plate is connected to the base through a second linear guide rail, so that the guide plate can move left and right through the second linear guide rail. A correction component for controlling the left and right movement of the guide plate is installed at one end of the base. When the guide plate moves left and right, the film feeding platform moves in the same direction with the guide plate.

[0011] Furthermore, the correction component consists of a correction motor, a correction screw and a correction connecting block. The correction connecting block is connected to the bottom of the guide plate. One end of the correction screw is connected to the correction motor, and the other end is fixed through the correction connecting block. The correction screw drives the correction connecting block to move left and right through the correction motor to realize the left and right correction movement of the guide plate.

[0012] Furthermore, the guide plate and the film feeding platform are both provided with air holes for adsorbing the electrode sheets, and one end of the guide plate and the film feeding platform are both provided with connectors communicating with the corresponding air holes.

[0013] Furthermore, the downward pressure positioning member is connected to the first mounting seat through a fourth linear guide rail, so that the first mounting seat equipped with the first downward pressure roller can move left and right along the fourth linear guide rail. When the first downward pressure roller is connected to the pole piece roller through the pole piece, the first downward pressure roller can move left and right along with the pole piece roller through the fourth linear guide rail.

[0014] Furthermore, two reset springs for resetting the first downward pressure roller are connected between the downward pressure positioning member and the first mounting seat. The two reset springs are symmetrically distributed. When the first downward pressure roller moves away from the pole piece roller, the reset spring resets the first downward pressure roller to the center.

[0015] Furthermore, the pressing assembly also includes a lifting control cylinder for controlling the up and down movement of the pressing positioning member.

[0016] Furthermore, one end of the downward positioning member is connected to a positioning pin for inserting into the film feeding platform for positioning, and the film feeding platform is provided with a positioning socket corresponding to the positioning pin.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] When the electrode is conveyed, the utility model is pressed and conveyed on the electrode roller and the film roller in turn. At the same time, a diaphragm is added to the film roller to be conveyed synchronously with the electrode. The electrode is wound together by the diaphragm, which saves waiting time, improves the alignment of the electrode and the diaphragm, improves production efficiency, and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front end direction of the overall structure of an embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the rear end direction of the overall structure of an embodiment of the utility model;

[0021] Figure 3 This is a schematic diagram of the base structure of an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the base removal guide plate structure of the embodiment of the utility model;

[0023] Figure 5 For the embodiment of the utility model Figure 4 A schematic diagram of the structure of part A in the middle;

[0024] Figure 6 For the embodiment of the utility model Figure 4 A magnified schematic diagram of the structure of part B;

[0025] Figure 7 This is a schematic diagram of the front end direction of the pressing component according to an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram of the rear end direction of the pressing assembly according to an embodiment of the utility model;

[0027] Numbers in the figure:

[0028] 1-base, 2-movable block, 3-guide plate, 4-feeding platform, 5-pole roller, 6-film roller, 7-pressing assembly, 8-first linear guide, 9-third linear guide, 10-first telescopic cylinder, 11-correction sensor, 12-cross bar, 13-second linear guide, 14-correction assembly, 15-air hole, 16-connector, 17-fourth linear guide, 18-reset spring, 19-lifting control cylinder, 20-positioning pin, 21-positioning socket;

[0029] 701-downward pressing positioning member, 702-first mounting seat, 703-second mounting seat, 704-first downward pressing roller, 705-second downward pressing roller, 706-second telescopic cylinder;

[0030] 1401-correction motor, 1402-correction screw rod, 1403-correction connecting block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-8 As shown, the utility model provides a diaphragm-driven sheet-type pole piece winding mechanism, which needs to be used in conjunction with the diaphragm and is mainly used to allow the pole piece to be better wound by driving the diaphragm.

[0033] The structure of this mechanism mainly includes a base 1 and two movable blocks 2 that can move toward one end of the base 1. A guide plate 3 for conveying the electrode is provided above the base 1. A feeding table 4 that can move toward one end of the guide plate 3 is installed between the two movable blocks 2. When the movable block 2 moves toward the base 1, the feeding table 4 moves synchronously toward the guide plate 3 to transfer the electrode. The position where the electrode is placed is one end of the guide plate 3, and the position where the electrode is finally wound is set at one end of the feeding table 4. Therefore, the feeding table 4 needs to move toward one end of the guide plate 3 to convey the electrode to one end of the feeding table 4.

[0034] In order to improve the stability of the forward and backward movement, the base 1 is connected to one end of the movable block 2 by a first linear guide 8, so that the movable block 2 moves along the first linear guide 8 toward the base 1, and the guide plate 3 and the film feeding platform 4 are connected at one end by a third linear guide 9, so that the film feeding platform 4 moves along the third linear guide 9 toward the guide plate 3. The movable block 2 on the first linear guide 8 and the film feeding platform 4 on the third linear guide 9 adopt a synchronous movement method to prevent the direction from deviating when the electrode is transferred. In addition, a first telescopic cylinder 10 is also connected between the guide plate 3 and the film feeding platform 4 to control the movement of the film feeding platform 4 on the third linear guide 9. The first telescopic cylinder 10 serves as the power provided during the movement.

[0035] The electrode is transferred from the surface of the guide plate 3 to the surface of the feeding table 4. In order to improve the adsorption effect of the electrode on the surfaces of the guide plate 3 and the feeding table 4, the surfaces of the guide plate 3 and the feeding table 4 are provided with air holes 15 for adsorbing the electrode. At the same time, one end of the guide plate 3 and the feeding table 4 is provided with a connector 16 that is connected to the corresponding air hole 15. The user can use the connector 16 to connect the equipment that provides adsorption power.

[0036] In order to better compact the electrode transferred from the guide plate 3, a rotatable electrode roller 5 is installed on the surface of the feeding platform 4. When combined with the diaphragm, in order to better allow the electrode to contact the diaphragm, a film roller 6 is installed at the rear end of the feeding platform 4 between the two movable blocks 2. A pressing component 7 that can move up and down is also added above the feeding platform 4. After the pressing component 7 is pressed down, it can fix the direction and angle of the electrode transmission with the electrode roller 5 to avoid deviation. At the same time, the pressing component 7 can also be synchronously pressed on the surface of the film roller 6 to make the diaphragm and the electrode fit better before winding. At this time, the direction of entry of the diaphragm is from the bottom of the feeding platform 4, and it goes around the outside of the film roller 6 to fit with the electrode above, and then enters the top of the film roller 6 together and is tightened by the pressing component 7. It should be noted that the pressing assembly 7 will only descend and engage with the film feeding platform 4 when the film feeding platform 4 moves back to the bottom of the pressing assembly 7. The pressing assembly 7 does not move as the film feeding platform 4 moves forward and backward.

[0037] The structure of the pressing assembly 7 includes a pressing positioning member 701, a first mounting seat 702 connected to one end of the pressing positioning member 701, and a second mounting seat 703 connected to the other end of the pressing positioning member 701, wherein the first mounting seat 702 is installed with a first pressing roller 704 that can press down on the pole piece roller 5, and the second mounting seat 703 is installed with a second pressing roller 705 that can press down on the membrane roller 6. After the first pressing roller 704 is lowered, it is pressed against the pole piece roller 5 to fix the direction and position of the pole piece movement, and after the second pressing roller 705 is lowered, it contacts the membrane roller 6 to press the pole piece and the diaphragm, thereby improving the integrity of the pole piece and the diaphragm after bonding, and avoiding the occurrence of incomplete bonding such as bubbles. In addition, the pressing positioning member 701 is connected to one end of the second mounting seat 703 by a second telescopic cylinder 706, which is used to adjust the distance between the second pressing roller 705 and the membrane roller 6. Since the first downward pressing roller 704 at the front end is only used to press down the electrode sheet, the height of the first downward pressing roller 704 can be adjusted according to the thickness of the electrode sheet, and the second downward pressing roller 705 at the rear end needs to press down the electrode sheet and the diaphragm at the same time. In addition, the diaphragm has a certain thickness, so the height of the second downward pressing roller 705 needs to be adjusted according to the actual thickness to meet the use of diaphragms of different thicknesses.

[0038] To control the vertical movement of the hold-down assembly 7, a drive-controlled lifting control cylinder 19 is installed at the top of the hold-down assembly 7. When the film feed table 4 retreats to the bottom of the hold-down assembly 7, the lift drive control cylinder 19 controls the hold-down assembly 7 to descend, aligning and contacting the film feed table 4. During positioning, one end of the hold-down positioning member 701 is connected to a positioning pin 20 for inserting into the film feed table 4. The film feed table 4 is equipped with a corresponding positioning socket 21 for inserting the positioning pin 20.

[0039] In addition, in order to allow the transferred electrode to contact the diaphragm in a more precise position, the transferred electrode can be corrected left and right during operation and adjusted to the position corresponding to the diaphragm to avoid deviation when the electrode and diaphragm are fitted.

[0040] The left and right correction adjustment of the position of the pole piece is mainly completed by the correction sensor 11 for detecting the position of the pole piece and the correction component 14 at one end of the base 1. Specifically, when the pole piece transitions from the guide plate 3 to the feeding table 4, the movable block 2 is installed with a correction sensor 11 for detecting the position of the pole piece on the feeding table 4. The correction sensor 11 needs to be used in conjunction with the correction sensor. When in use, the correction sensor 11 promptly detects whether the position of the pole piece has deviated, and feeds back to the correction component 14 through the sensor to adjust the position of the pole piece.

[0041] For example: if the reference position of the pole piece is set to 0 before the correction sensor 11 detects it, if the value detected by the correction sensor 11 is 0, the pole piece position does not need to be adjusted; if the value after the correction sensor 11 detects the pole piece position is negative, then the correction component 14 needs to control the guide plate 3 and the film feed table 4 to move to the right a corresponding distance; if the value after the correction sensor 11 detects the pole piece position is positive, then the correction component 14 needs to control the guide plate 3 and the film feed table 4 to move to the left a corresponding distance. In this way, the position of the pole piece is corrected to the left and right. In order to better detect the position of the pole piece, the correction sensor 11 uses an infrared correction sensor, which uses the characteristics of infrared rays to monitor and control the position of the object.

[0042] Among them, the correction component 14 is composed of a correction motor 1401, a correction screw 1402 and a correction connecting block 1403. The correction connecting block 1403 is connected to the bottom of the guide plate 3. One end of the correction screw 1402 is connected to the correction motor 1401, and the other end is fixed through the correction connecting block 1403. The correction screw 1402 drives the correction connecting block 1403 to move left and right through the correction motor 1401 to realize the left and right correction movement of the guide plate 3.

[0043] To facilitate the synchronous movement of the guide plate 3 and the film feed platform 4 during left-right deflection adjustment, a crossbar 12 passing through the interior of the film feed platform 4 is connected between the two movable blocks 2, allowing the film feed platform 4 to move left and right along the crossbar 12. The guide plate 3 is connected to the base 1 via a second linear guide 13, allowing the guide plate 3 to move left and right. When the position of the pole piece is corrected left and right, the guide plate 3 and the film feed platform 4 move synchronously.

[0044] When the electrode is corrected to the left and right, the feeding platform 4 has been retreated to the bottom of the pressing assembly 7. At this time, the pressing assembly 7 can be aligned and contacted with the feeding platform 4 before correction. Because the correction is only for the electrode, the film roller 6 provided at the rear end of the feeding platform 4 does not need to move left and right. Since the pressing positioning member 701 is connected to the first mounting seat 702 through the fourth linear guide 17, the first mounting seat 702 equipped with the first pressing roller 704 is moved left and right along the fourth linear guide 17. When the first pressing roller 704 is pressed against the electrode roller 5, the first pressing roller 704 can be moved left and right along with the electrode roller 5 through the fourth linear guide 17. After the position of the electrode is adjusted, the second pressing roller 705 at the rear end can be controlled so that the electrode contacts the diaphragm and the film is then wound.

[0045] Two reset springs 18 for resetting the first lower pressing roller 704 are connected between the lower pressing positioning member 701 and the first mounting seat 702. The two reset springs 18 are symmetrically distributed. When the first lower pressing roller 704 is away from the surface of the pole piece roller 5, the reset spring 18 resets the first lower pressing roller 704 to the center. If the pole piece is completed, the feeding table 4 needs to move toward one end of the guide plate 3 again to connect a new pole piece for further processing. At this time, the lower pressing assembly 7 needs to rise and separate from the feeding table 4. At this time, the first lower pressing roller 704 is not subject to any force resistance after separating from the pole piece roller 5. The reset springs 18 on both sides need to return to a balanced state. The reset springs 18 reset the first lower pressing roller 704 to the center through their own force.

[0046] Compared with traditional technologies, this technical solution compresses the electrode sheets on the electrode sheet roller 5 and the membrane roller 6 during transmission. Meanwhile, a diaphragm is added to the membrane roller 6 to be transmitted synchronously with the electrode sheet. The diaphragm drives the electrode sheet to be wound together, which reduces waiting time, improves the alignment of the electrode sheet and the diaphragm, improves production efficiency, and reduces production costs. In addition, the electrode sheets transported in this way do not need to be provided with a light foil at the front end, which can increase the capacity of the battery cell after use.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

Claims

1. The diaphragm drives the sheet-type electrode into the winding mechanism, which includes a base and two movable blocks that can move forward. A guide plate for conveying the electrode is provided above the base. A feeding platform that can move toward the guide plate is installed between the two movable blocks. When the movable block moves toward the base, the feeding platform moves synchronously toward the guide plate. The characteristics are: The film feeding platform is equipped with a rotatable pole piece roller, and a film roller located at the rear end of the film feeding platform is also installed between the two movable blocks. A downward pressing component that can move up and down is also provided above the film feeding platform. The downward pressing component includes a downward pressing positioning member, a first mounting seat connected to one end of the downward pressing positioning member, and a second mounting seat connected to the other end of the downward pressing positioning member. The first mounting seat is equipped with a first downward pressing roller that can press down on the pole piece roller, and the second mounting seat is equipped with a second downward pressing roller that can press down on the film roller. The downward pressing positioning member is connected to one end of the second mounting seat by a second telescopic cylinder for adjusting the distance between the second downward pressing roller and the film roller.

2. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 1, characterized in that: The base is connected to one end of the movable block via a first linear guide rail, so that the movable block moves toward the base along the first linear guide rail.

3. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 1, characterized in that: The guide plate and one end of the film feeding platform are connected by a third linear guide rail, so that the film feeding platform moves toward the guide plate along the third linear guide rail. A first telescopic cylinder is also connected between the guide plate and the film feeding platform to control the movement of the film feeding platform on the third linear guide rail.

4. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 1, characterized in that: The movable block is equipped with a correction sensor for detecting the position of the pole piece on the film feeding platform. A cross bar passing through the inside of the film feeding platform is connected between the two movable blocks, so that the film feeding platform can move left and right along the cross bar. The guide plate is connected to the base through a second linear guide rail, so that the guide plate can move left and right through the second linear guide rail. A correction component for controlling the left and right movement of the guide plate is installed at one end of the base. When the guide plate moves left and right, the film feeding platform moves in the same direction with the guide plate.

5. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 4, characterized in that: The correction component consists of a correction motor, a correction screw and a correction connecting block. The correction connecting block is connected to the bottom of the guide plate. One end of the correction screw is connected to the correction motor, and the other end is fixed through the correction connecting block. The correction screw drives the correction connecting block to move left and right through the correction motor to realize the left and right correction movement of the guide plate.

6. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 1, characterized in that: The guide plate and the film feeding platform are both provided with air holes for adsorbing the electrode pieces, and one end of the guide plate and the film feeding platform are both provided with connectors that are in communication with the corresponding air holes.

7. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 1, characterized in that: The downward pressure positioning member is connected to the first mounting seat through a fourth linear guide rail, so that the first mounting seat equipped with the first downward pressure roller can move left and right along the fourth linear guide rail. When the first downward pressure roller is connected to the pole piece roller through the pole piece, the first downward pressure roller can move left and right along with the pole piece roller through the fourth linear guide rail.

8. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 7, characterized in that: Two reset springs for resetting the first downward pressure roller are connected between the downward pressure positioning member and the first mounting seat. The two reset springs are symmetrically distributed. When the first downward pressure roller moves away from the pole piece roller, the reset spring resets the first downward pressure roller to the center.

9. The diaphragm-driven sheet-type pole piece winding mechanism according to claim 1, characterized in that: The pressing assembly further includes a lifting control cylinder for controlling the upward and downward movement of the pressing positioning member.

10. The diaphragm-driven sheet-type pole piece winding mechanism according to any one of claims 1 to 9, characterized in that: One end of the downward positioning member is connected to a positioning pin for inserting into the film feeding platform for positioning, and the film feeding platform is provided with a positioning socket corresponding to the positioning pin.

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