Winding, demagnetizing and rolling mechanism for slit pole piece

Abstract

The utility model relates to the technical field of batteries, and discloses a slitting pole piece winding and demagnetizing rolling mechanism which comprises a connecting arm, a magnetic attraction part, a pressing roller and a winding roller, the winding roller is installed on a rack and driven by a driving mechanism to rotate, the winding roller is used for winding a slitting pole piece, and the magnetic attraction part is installed on the connecting arm. The magnetic attraction part and the pressing roller are installed on the side, facing the winding roller, of the connecting arm, the connecting arm is movably connected with the rack, the connecting arm enables the pressing roller to make contact with the periphery of a pole piece wound around the winding roller all the time, and the magnetic attraction part is in clearance fit with the pressing roller and the pole piece. By adopting the pole piece winding, demagnetizing and rolling mechanism disclosed by the utility model, the demagnetizing treatment can be carried out on the slit pole piece in the winding and rolling treatment processes.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a demagnetizing roller pressing mechanism for winding and pressing slit electrode sheets. Background Technology

[0002] Magnetization control is crucial in battery manufacturing. Incomplete demagnetization can lead to internal short circuits, causing low voltage in mild cases and even spontaneous combustion or explosion in severe cases. The slitting process involves cutting a roll of electrode sheets into multiple small strips. During this process, the blades and electrode sheets experience compression and friction, which easily generates metal dust. Most existing demagnetization mechanisms add a magnetic rod before and after the slitting blade, which is insufficient for thoroughly demagnetizing the individual electrode strips after slitting. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a demagnetizing roller pressing mechanism for winding and pressing slit electrode sheets, which can demagnetize the slit electrode sheets during the winding and pressing process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A demagnetizing roller pressing mechanism for winding slit electrode sheets is provided, comprising a connecting arm, a magnetic suction part, a pressure roller, and a winding roller. The winding roller is mounted on a frame and driven to rotate by a drive mechanism. The winding roller is used to wind up the slit electrode sheets. The magnetic suction part and the pressure roller are mounted on the side of the connecting arm facing the winding roller. The connecting arm is movably connected to the frame. The connecting arm ensures that the pressure roller is always in contact with the outer periphery of the electrode sheet wound on the winding roller. The magnetic suction part is in clearance fit with the pressure roller and the electrode sheet.

[0006] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheets, the connecting arm is rotatably connected to the frame via a rotating shaft. The axis of the rotating shaft is parallel to the rotation axis of the winding roller and the rotation axis of the pressing roller, and the winding roller is located below the connecting arm.

[0007] As a further embodiment of the demagnetizing roller pressing mechanism for winding and demagnetizing the slit electrode sheets, the magnetic suction part includes a first mounting base and a magnetic rod. The first mounting base is fixedly connected to the connecting arm by bolts, and the magnetic rod is fixed on the first mounting base. The magnetic rod is in clearance fit with the outer periphery of the pressure roller and the electrode sheet.

[0008] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheets, the magnetic rod has a cylindrical structure, and the center line of the magnetic rod along its length is parallel to the rotation axis of the winding roller.

[0009] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheets, the side of the magnetic rod closest to the winding roller is an arc shape recessed in the direction away from the winding roller.

[0010] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheets, both ends of the electrode sheet along the rotation axis of the winding roller do not extend beyond the magnetic rod.

[0011] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheets, it also includes a fixing part and a second mounting base. The second mounting base is a U-shaped structure with its opening facing the winding roller. The two ends of the pressure roller along its length are rotatably connected to the two side plates of the second mounting base. The fixing part is fixed on the connecting arm and connected to the second mounting base.

[0012] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheet winding, the fixing part is located on the side of the connecting arm away from the winding roller, the second mounting seat is located at the end of the connecting arm away from the rotation axis of the connecting arm, the fixing part is provided with a fixing groove, the fixing groove passes through the fixing part on both sides along its length direction, the connecting arm is inserted into the fixing groove and fixed by bolts.

[0013] As a further embodiment of the demagnetizing roller pressing mechanism for winding and demagnetizing the slit electrode sheets, the end of the connecting arm away from the second mounting seat is provided with a mounting hole that is inserted into the rotating shaft, and the side of the mounting hole away from the second mounting seat is open.

[0014] As a further embodiment of the demagnetizing roller pressing mechanism for the slit electrode sheet winding, the side of the connecting arm facing the winding roller is inclined, and the width of the side of the connecting arm adjacent to the rotating shaft is greater than the width of the side of the connecting arm adjacent to the pressing roller. The inclined surface is provided with an arc-shaped notch for avoiding the electrode sheet.

[0015] Beneficial effects:

[0016] In this invention, a winding roller is rotatably mounted on a frame and driven by a drive mechanism to wind up the slit electrode sheets. A connecting arm is movably connected to the frame, ensuring that a pressure roller mounted on the connecting arm remains in constant contact with the outer circumference of the small electrode rolls wound on the winding roller, thus performing roll pressing on the wound electrode sheets and improving the tightness of the winding. During the winding and rolling process, a magnetic suction part mounted on the connecting arm engages with the electrode sheet to absorb iron filings from the electrode surface during winding, achieving demagnetization. Simultaneously, the magnetic suction part's engagement with the pressure roller ensures that the demagnetization process does not affect the pressure roller's rolling operation. This electrode sheet winding, demagnetizing, and rolling mechanism of this invention demagnetizes the slit electrode sheets during winding and rolling, solving the problem of weak demagnetization after slitting, reducing the introduction of metal dust, and meeting the stringent demagnetization requirements of battery production. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of the demagnetizing roller pressing mechanism for winding the slit electrode sheets according to an embodiment of the present invention. Figure 1 ;

[0019] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0020] Figure 3 This is a schematic diagram of the structure of the demagnetizing roller pressing mechanism for winding the slit electrode sheets according to an embodiment of the present invention. Figure 2 .

[0021] Figures 1 to 3 middle:

[0022] 100. Electrode;

[0023] 1. Connecting arm; 11. Mounting hole; 12. Arc-shaped notch; 2. Magnetic suction part; 21. First mounting seat; 22. Magnetic rod; 3. Pressure roller; 4. Take-up roller; 5. Fixing part; 51. Fixing groove; 6. Second mounting seat. Detailed Implementation

[0024] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are merely used for distinction in description and have no special meaning.

[0028] like Figures 1 to 3 As shown, the demagnetizing roller pressing mechanism for winding and demagnetizing the slit electrode sheets in this embodiment includes a connecting arm 1, a magnetic suction part 2, a pressure roller 3, and a winding roller 4. The winding roller 4 is mounted on the frame (not shown in the figure) and driven to rotate by a drive mechanism. The winding roller 4 is used to wind up the slit electrode sheets 100. The magnetic suction part 2 and the pressure roller 3 are mounted on the side of the connecting arm 1 facing the winding roller 4. The connecting arm 1 is movably connected to the frame. The connecting arm 1 ensures that the pressure roller 3 is always in contact with the outer periphery of the electrode sheet 100 wound on the winding roller 4. The magnetic suction part 2 is in clearance fit with the pressure roller 3 and the electrode sheet 100.

[0029] Understandably, the take-up roller 4 is rotatably mounted on the frame and driven by a drive mechanism (not shown in the figure) to perform a take-up operation on the slit electrode sheet 100. The connecting arm 1 is movably connected to the frame and allows the pressure roller 3 mounted on the connecting arm 1 to always be in contact with the outer periphery of the electrode sheet 100 wound on the take-up roller 4, thereby performing a roll pressing process on the wound electrode sheet 100 and improving the tightness of the slit electrode sheet 100. During the take-up and roll pressing process of the electrode sheet 100, the magnetic suction part 2 mounted on the connecting arm 1 is in clearance fit with the electrode sheet 100, which can pick up iron filings on the surface of the electrode sheet 100 during the take-up process, achieving demagnetization. At the same time, the magnetic suction part 2 is in clearance fit with the pressure roller 3, so the demagnetization process will not affect the roll pressing operation of the pressure roller 3.

[0030] The electrode winding and demagnetizing roller pressing mechanism of this embodiment can demagnetize the slit electrode 100 during the winding and pressing process, which solves the problem of weak demagnetizing ability after the electrode slitting machine is cut, reduces the introduction of metal dust, and meets the stringent requirements for demagnetization in the battery production process.

[0031] Furthermore, the connecting arm 1 is rotatably connected to the frame via a rotating shaft (not shown in the figure). The axis of the rotating shaft is parallel to the rotation axis of the take-up roller 4 and the rotation axis of the pressure roller 3. The take-up roller 4 is located below the connecting arm 1.

[0032] Since the connecting arm 1 is rotatably connected to the frame via a rotating shaft (not shown in the figure), and the take-up roller 4 is located below the connecting arm 1, when the electrode 100 is wound on the take-up roller 4, the weight of the connecting arm 1, the magnetic suction part 2, and the pressure roller 3 will always keep the pressure roller 3 in contact with the outer periphery of the electrode 100. As the diameter of the small roll of electrode 100 increases, the pressure roller 3 rotates around the rotating shaft, thereby ensuring that the pressure roller 3 is always in contact with the outer periphery of the electrode 100 during the winding process, resulting in a good rolling effect.

[0033] Furthermore, the magnetic suction unit 2 includes a first mounting base 21 and a magnetic rod 22. The first mounting base 21 is fixedly connected to the connecting arm 1 by bolts, and the magnetic rod 22 is fixed on the first mounting base 21. The magnetic rod 22 is in clearance fit with the pressure roller 3 and the outer periphery of the electrode 100. The magnetic rod 22 is fixed on the connecting arm 1 by the first mounting base 21 to demagnetize the electrode 100 during the winding process.

[0034] In this embodiment, the magnetic rod 22 has a cylindrical structure, and its center line along its length is parallel to the rotation axis of the winding roller 4. By designing the magnetic rod 22 as a cylindrical structure, it is possible to avoid the small coil of the electrode sheet 100 from contacting the outer periphery of the magnetic rod 22 as its diameter increases, thus preventing it from affecting normal winding.

[0035] Furthermore, the side of the magnetic rod 22 closest to the take-up roller 4 is recessed in an arc shape, moving away from the take-up roller 4. By recessing the lower end face of the magnetic rod 22, i.e. the side closest to the take-up roller 4, into an arc shape, the magnetic attraction surface of the magnetic rod 22 facing the small roll of electrode sheet 100 is increased, thereby improving the demagnetization effect of the magnetic rod 22 on the small roll of electrode sheet 100.

[0036] Furthermore, since the two ends of the electrode 100 do not extend beyond the magnetic rod 22 along the rotation axis of the winding roller 4, the magnetic rod 22 can cover the electrode 100 along the width direction of the electrode 100 to further improve the demagnetization effect.

[0037] For example, the connecting arm 1 has a plate-like structure, and the thickness of the connecting arm 1 extends along the rotation axis of the take-up roller 4. The first mounting base 21 includes two mounting blocks, which are respectively fixed to both sides of the connecting arm 1 along its thickness direction by screws. The two mounting blocks protrude from the connecting arm 1 on the side facing the take-up roller 4, which facilitates the installation of the magnetic rod 22. The magnetic rod 22 includes two sub-magnetic rods, which are respectively fixed to the opposite sides of the two mounting blocks. The side of the sub-magnetic rod away from the mounting block protrudes from the side of the electrode 100 along the rotation axis of the take-up roller 4.

[0038] In other embodiments, a connecting hole can be opened on the side of the mounting block facing the winding roller 4, and the magnetic rod 22 can be inserted into the connecting hole for fixation.

[0039] In this embodiment, the demagnetizing roller pressing mechanism for the slit electrode sheet winding also includes a fixing part 5 and a second mounting seat 6. The second mounting seat 6 is a U-shaped structure with its opening facing the winding roller 4. The two ends of the pressure roller 3 along its length direction are rotatably connected to the two side plates of the second mounting seat 6. The fixing part 5 is fixed on the connecting arm 1 and connected to the second mounting seat 6.

[0040] The second mounting base 6 is designed with a U-shaped structure, that is, the second mounting base 6 includes two side plates and a connecting plate fixedly connected to the two side plates. The U-shaped structure facilitates the installation of the pressure roller 3. For example, the pressure roller 3 is located between the two side plates, and the two ends of the pressure roller 3 along its length direction are respectively rotatably connected to the corresponding side plate through a connecting shaft, and the fixing part 5 is fixedly connected to the connecting plate.

[0041] The fixing part 5 is located on the side of the connecting arm 1 away from the take-up roller 4, and the second mounting seat 6 is located at the end of the connecting arm 1 away from the rotation axis of the connecting arm 1. The fixing part 5 has a fixing groove 51, which passes through the fixing part 5 on both sides along its length direction. The connecting arm 1 is inserted into the fixing groove 51 and fixed by bolts.

[0042] like Figure 1 and Figure 2As shown, in this embodiment, a fixing groove 51 is opened on the side of the fixing part 5 facing the connecting arm 1. The fixing groove 51 allows the connecting arm 1 to be inserted and engaged with the fixing part 5 to achieve initial fixation, which facilitates the adjustment of the position of the pressure roller 3. After the position is adjusted, it is then tightened with bolts to achieve a stable connection between the fixing part 5 and the connecting arm 1.

[0043] Furthermore, the end of the connecting arm 1 away from the second mounting base 6 is provided with a mounting hole 11 that is engaged with the rotating shaft, and the side of the mounting hole 11 away from the second mounting base 6 is open.

[0044] In this embodiment, a mounting hole 11 is provided at the end of the connecting arm 1 away from the second mounting base 6. After the rotating shaft passes through the mounting hole 11, both ends of the rotating shaft are fixed to the frame, and the connecting arm 1 can rotate relative to the rotating shaft. Alternatively, in other embodiments, the rotating shaft is inserted into the mounting hole 11 and then rotatably connected to the frame, which also enables the rotation of the connecting arm 1. By leaving the side of the mounting hole 11 away from the second mounting base 6 open, the difficulty of disassembling and assembling the rotating shaft can be reduced.

[0045] Furthermore, the side of the connecting arm 1 facing the winding roller 4 is an inclined surface, and the width of the side of the connecting arm 1 adjacent to the rotating shaft is greater than the width of the side of the connecting arm 1 adjacent to the pressure roller 3. The inclined surface is provided with an arc-shaped notch 12 for avoiding the electrode sheet 100.

[0046] By designing the side of the connecting arm 1 facing the take-up roller 4 as an inclined surface, and opening an arc-shaped notch 12 on the inclined surface, the small roll of electrode 100 can be avoided, thus preventing the connecting arm 1 from making non-rolling contact with the outer peripheral surface of the small roll of electrode 100 and damaging the electrode 100.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A slitting post-pole winding demagnetization roller mechanism, characterized in that, The connecting arm, the magnetic attraction part, the compression roller and the winding roller are included, the winding roller is installed on the rack and is driven to rotate by the driving mechanism, the winding roller is used for winding the polar piece after slitting, the magnetic attraction part and the compression roller are installed on the side of the connecting arm facing the winding roller, the connecting arm is movably connected with the rack, the connecting arm makes the compression roller always contact with the outer periphery of the polar piece wound on the winding roller, and the magnetic attraction part is matched with the compression roller and the polar piece.

2. The slitting post-pole winding demagnetization roller pressing mechanism according to claim 1, characterized in that, The connecting arm is rotatably connected with the rack through the rotating shaft, the axis of the rotating shaft is parallel to the rotating axis of the winding roller and the rotating axis of the compression roller, and the winding roller is located below the connecting arm.

3. The slitting post-Tab-wound de-magnetizing roller mechanism of claim 1, wherein, The magnetic attraction part includes a first mounting seat and a magnetic rod, the first mounting seat is fixedly connected with the connecting arm through bolts, and the magnetic rod is fixed on the first mounting seat.

4. The slitting post-pole winding demagnetization roller pressing mechanism according to claim 3, characterized in that, The magnetic rod is a cylindrical structure, and the center line of the magnetic rod in the length direction is parallel to the rotating axis of the winding roller.

5. The slitting post-pole winding demagnetization roller pressing mechanism according to claim 3, characterized in that, The side of the magnetic rod close to the winding roller is concave in the direction away from the winding roller.

6. The slitting post-pole winding demagnetization roller pressing mechanism according to claim 3, characterized in that, The two ends of the polar piece in the direction of the rotating axis of the winding roller do not exceed the magnetic rod.

7. The slitting post-Tab-wound de-magnetizing roller mechanism of claim 2, wherein, The fixed part and the second mounting seat are further included, the second mounting seat is a U-shaped structure with an opening facing the winding roller, the two ends of the compression roller in the length direction are rotatably connected with the two side plates of the second mounting seat, and the fixed part is fixed on the connecting arm and connected with the second mounting seat.

8. The slitting post- pole web roll de-magnetizing and roll press mechanism of claim 7, wherein, The fixed part is located on the side of the connecting arm away from the winding roller, the second mounting seat is located on the end of the connecting arm away from the rotating axis of the connecting arm, the fixed part is provided with a fixed groove penetrating through the fixed part in the length direction, the connecting arm is insertedly matched with the fixed groove and is fixed by bolts.

9. The slitting post- pole web roll de-magnetizing and roll press mechanism of claim 8, wherein, The end of the connecting arm away from the second mounting seat is provided with a mounting hole insertedly matched with the rotating shaft, and the side of the mounting hole away from the second mounting seat is open.

10. The slitting post-slit pole sheet roll-off demagnetization roller mechanism according to any one of claims 7 to 9, characterized in that, The side of the connecting arm facing the winding roller is an inclined surface, and the width of the side of the connecting arm adjacent to the rotating shaft is greater than the width of the side of the connecting arm adjacent to the compression roller, and the inclined surface is provided with an arc-shaped notch for avoiding the polar piece.

Images