A terminal ear anti-folding device and winding machine

Abstract

The present invention relates to the technical field of battery production and manufacturing, and in particular to a tab anti-folding device and a winding machine. The tab anti-folding device includes a roller mechanism, and the roller mechanism includes a roller shaft and a roller, and the roller is rotatably sleeved on the roller shaft, and the roller includes a cylindrical section and a conical section, and the small diameter section of the conical section is away from the side of the pole piece, and the cylindrical section is in contact with the pole piece, and the conical section can cooperate with the tab on the pole piece. The present invention has a simple structure, can effectively reduce the situation that the tab is folded or even broken when passing through the roller, and improves the yield rate.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production and manufacturing, and in particular to a tab anti-folding device and a winding machine. Background Art

[0002] At present, in the production of power lithium batteries, battery cells are mainly formed by winding machines. Since the pole sheets are relatively thin, the pole ears on the pole sheets are thin and slender, and the winding speed is relatively fast, when the pole sheets pass through the cylindrical rollers of the winding machine, it is easy to cause the pole ears to fold, and even cause the roots of the pole ears to tear and break the belt. Summary of the invention

[0003] The purpose of the present invention is to provide a tab anti-folding device, which can smooth the tab and effectively prevent the tab from folding or even breaking when passing through a roller.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A pole lug anti-bending device comprises a roller mechanism, wherein the roller mechanism comprises a roller shaft and a roller, wherein the roller is rotatably mounted on the roller shaft, wherein the roller comprises a cylindrical section and a conical section, wherein the small diameter end of the conical section is arranged on a side away from the pole piece, and the cylindrical section is in contact with the pole piece, and the conical section can cooperate with the pole lug on the pole piece.

[0006] Preferably, the roller is an integrally formed structure; or the cylindrical section and the conical section are independently arranged.

[0007] Preferably, the tab anti-bending device further comprises a tab smoothing mechanism, and the two tab smoothing mechanisms are respectively arranged at the inlet end and the outlet end of the roller.

[0008] Preferably, the angle between the two tab smoothing mechanisms is adjustable.

[0009] Preferably, the tab smoothing mechanism comprises:

[0010] A bracket, arranged on the roller shaft, and the bracket is L-shaped;

[0011] Two symmetrically arranged smoothing components are arranged on the bracket, and the pole lug passes through the two smoothing components.

[0012] Preferably, the bracket includes a mounting block and a pressing block, the mounting block is detachably connected to the pressing block, and both the mounting block and the pressing block are provided with semi-through holes, and after the mounting block and the pressing block are connected, the two semi-through holes form a through hole, and the roller shaft is interference fit with the through hole.

[0013] Preferably, the distance between the two smoothing components is adjustable.

[0014] Preferably, the smoothing component comprises:

[0015] A support rod, arranged on the bracket;

[0016] A guide block, wherein the guide block is sleeved on the support rod;

[0017] A caressing plate is fixed to the bottom surface of the guide block, and the pole lug passes through the two caressing plates.

[0018] Preferably, the stroking plate comprises:

[0019] A plane, one side of which is connected to the bottom surface of the guide block, and the pole lug passes through the other side of the planes of the two smoothing plates;

[0020] Two arc surfaces are arranged opposite to each other, and the distance between the two arc surfaces gradually decreases along the direction in which the guide block is connected to the plane.

[0021] Beneficial effects: The present invention provides a device for preventing the tab from folding. When the tab passes through the roller, the tab fits with the cylindrical section, and the tab matches with the conical section. If the tab is in a normal state and is not folded, the conical section of the roller has no contact with the tab, which can prevent the tab from folding in a direction away from the conical section due to the support force of the conical section. If the tab folds in a direction close to the conical section, the surface of the conical section will contact the tab to prevent the tab from continuing to fold in the direction of the roller, and the tab is moved away from the conical section under the force of the conical section to correct the tab. The present invention has a simple structure, can effectively reduce the folding or even breaking of the tab when passing through the roller, and improves the yield rate.

[0022] Another object of the present invention is to provide a winding machine, including the above-mentioned tab anti-folding device, which can effectively reduce the folding or even breaking of the tab when passing through the roller, thereby improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the tab anti-folding device provided by the present invention;

[0024] Figure 2 It is a structural schematic diagram of the roller mechanism provided by the present invention;

[0025] Figure 3 It is a structural schematic diagram of the tab smoothing mechanism provided by the present invention;

[0026] Figure 4 It is a schematic structural diagram of two tab smoothing mechanisms provided by the present invention at a first angle;

[0027] Figure 5It is a schematic structural diagram of two tab smoothing mechanisms provided by the present invention at another angle.

[0028] in:

[0029] 1. Roller mechanism; 11. Roller shaft; 12. Roller; 121. Cylindrical section; 122. Conical section; 13. Bearing stop;

[0030] 2. Tab smoothing mechanism;

[0031] 21. bracket; 211. mounting block; 212. pressing block;

[0032] 22. Smoothing assembly; 221. Support rod; 222. Guide block; 223. Smoothing plate;

[0033] 100. Pole piece; 101. Tab. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0036] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figure 1 As shown, this embodiment provides a winding machine including a tab anti-folding device, which can effectively reduce the possibility of the tab 101 being folded or even broken when passing through the roller 12, thereby improving the yield rate.

[0040] Specifically, the pole ear anti-bending device in this embodiment includes a roller mechanism 1, the roller mechanism 1 includes a roller shaft 11 and a roller 12, the roller 12 is rotatably mounted on the roller shaft 11, the roller 12 includes a cylindrical section 121 and a conical section 122, the small diameter end of the conical section 122 is arranged on the side away from the pole piece 100, and the cylindrical section 121 is in contact with the pole piece 100, and the conical section 122 can cooperate with the pole ear 101 on the pole piece 100.

[0041] When the pole piece 100 passes through the roller 12, the pole piece 100 fits with the cylindrical section 121, and the pole ear 101 cooperates with the conical section 122. If the pole ear 101 is in a normal state and is not folded, the conical section 122 and the pole ear 101 are not in contact, which can prevent the pole ear 101 from folding in a direction away from the conical section 122 due to the support force of the conical section 122; if the pole ear 101 folds in a direction close to the conical section 122, the surface of the conical section 122 will contact the pole ear 101 to prevent the pole ear 101 from continuing to fold in the direction of the roller 12, and make the pole ear 101 away from the conical section 122 under the force of the conical section 122 to correct the pole ear 101. The roller mechanism 1 can effectively reduce the folding or even breaking of the pole ear 101 when passing through the roller 12, thereby improving the yield rate.

[0042] Among them, in this embodiment, for the purpose of simple cost and convenient control, the roller 12 is an integrally formed structure. In other embodiments, the cylindrical section 121 and the conical section 122 can also be independently provided so that the two can rotate relative to each other. If the pole ear 101 is folded, the pole ear 101 will drive the conical section 122 to rotate. Due to the different folding degrees of the pole ear, the rotation speed of the conical section 122 is also different, and the support force brought to the pole ear 101 is different. In this way, the conical section 122 can adjust the rotation speed according to the state of the pole ear 101 when cooperating with the pole ear 101, thereby further reducing the situation where the pole ear 101 is folded or even broken when passing through the roller 12.

[0043] Combination Figure 2 It can be seen that in order to prevent the roller 12 from axially moving on the roller shaft 11 , the roller mechanism 1 further includes two bearing stops 13 , which are sleeved on the roller shaft 11 and respectively abut against two ends of the roller 12 .

[0044] In this embodiment, Figure 3 As shown, in order to better prevent the pole lug 101 from folding when passing through the roller 12, the pole lug anti-folding device also includes a pole lug smoothing mechanism 2. The two pole lug smoothing mechanisms 2 are respectively arranged at the inlet and outlet ends of the roller 12. Even if the pole piece 100 is rewound and the roller 12 is reversed, it can continue to be used without reinstallation.

[0045] Specifically, Figure 1 and Figure 3 As shown, the pole lug smoothing mechanism 2 includes a bracket 21 and two symmetrically arranged smoothing components 22. The bracket 21 is arranged on the roller shaft 11, and the bracket 21 is L-shaped. This shape can meet the requirement that even if the pole piece 100 is at a very small bending angle, the two pole lug smoothing mechanisms 2 will not interfere with each other, and are convenient to use; the two smoothing components 22 are arranged on the bracket 21 in parallel and at intervals, and the pole lug 101 passes through the gap between the two smoothing components 22.

[0046] During the production of the battery cell, the bending angle of the electrode 100 will gradually decrease during the winding process. Figure 4 and Figure 5 It can be seen that in order to make the tab smoothing mechanism 2 always smooth the tab 101, the angle between the two tab smoothing mechanisms 2 is adjustable. The angle between the two tab smoothing mechanisms 2 can be adjusted by adjusting the angle of the bracket 21 relative to the roller shaft 11.

[0047] Specifically, the bracket 21 includes a mounting block 211 and a pressing block 212. The mounting block 211 is detachably connected to the pressing block 212. Both the mounting block 211 and the pressing block 212 are provided with semi-through holes. After the mounting block 211 and the pressing block 212 are connected, the two semi-through holes form a through hole, and the roller shaft 11 is passed through the through hole. Before use, the mounting block 211 can be rotated to a suitable position and then the pressing block 212 can be installed, so that the bracket 21 is fixed on the roller shaft 11.

[0048] In order to prevent the bracket 21 from rotating during operation, the through hole formed by the mounting block 211 and the pressing block 212 is interference fit with the roller shaft 11 .

[0049] Furthermore, in order to achieve a detachable fixed connection between the pressing block 212 and the mounting block 211, a fixing through hole is provided on the pressing block 212, and a threaded hole is provided at a corresponding position of the mounting block 211. The first fastener passes through the fixing through hole and is threadedly connected to the threaded hole, thereby not only preventing the pole ear smoothing mechanism 2 from rotating, but also achieving a detachable connection between the bracket 21 and the roller shaft 11.

[0050] Illustratively, the first fastener may be a bolt or a screw.

[0051] In order to smooth the pole ear 101, the smoothing assembly 22 includes a support rod 221, a guide block 222 and a smoothing plate 223. The support rod 221 is arranged on the bracket 21; the guide block 222 is sleeved on the support rod 221; the smoothing plate 223 is fixed to the bottom surface of the guide block 222, and the pole ear 101 passes through the gap between the two smoothing plates 223.

[0052] Optionally, the distance between the two smoothing assemblies 22 is adjustable to accommodate different thicknesses of the tabs 101. The distance between the two smoothing assemblies 22 can be adjusted by making the mounting position of the support rod 221 on the bracket 21 adjustable.

[0053] Specifically, a long hole is provided on the mounting block 211, and the end of the support rod 221 can be slidably fixed in the long hole. For example, when the end of the support rod 221 slides to a desired position in the long hole, fastening nuts are placed on both sides of the long hole, and the fastening nuts are sleeved on the support rod 221. After the nuts are tightened, the two nuts are respectively abutted against the two sides of the mounting block 211. The slidable fixing of the support rod 221 on the mounting block 211 can not only adjust the height of the smoothing assembly 22 itself, but also adjust the distance between the two smoothing assemblies 22 to match the position of the tab 101.

[0054] In order to adapt to different sizes of tabs 101, the guide block 222 is slidably mounted on the support rod 221, that is, before use, the guide block 222 can be slid to a suitable position and then fixed on the support rod 221. The guide block 222 is provided with a sliding through hole, and the support rod 221 is inserted into the sliding through hole, so that the guide block 222 can drive the smoothing plate 223 to be in the position where the tab 101 is most easily folded according to the actual production process.

[0055] Furthermore, in order to prevent the guide block 222 from sliding during operation, a stabilizing through hole is provided on the guide block 222, and the second fastener passes through the stabilizing through hole and abuts against the outer wall of the support rod 221. When the position of the guide block 222 needs to be adjusted, the second fastener is loosened, and then the guide block 222 is slid to the desired position.

[0056] In order to smooth the pole ear 101 more smoothly and reduce damage to the pole ear 101 during the smoothing process, the smoothing plate 223 includes a plane and two oppositely arranged arc surfaces, one side of the plane is connected to the bottom surface of the guide block 222, and the pole ear 101 passes through the other side of the plane of the two smoothing plates 223; the distance between the two arc surfaces gradually decreases along the direction in which the guide block 222 is connected to the plane.

[0057] Optionally, the lengths of the two caressing plates 223 may be different. In this embodiment, the caressing plate 223 close to the roller mechanism 1 is shorter, thereby avoiding interference between the caressing plate 223 and the roller mechanism 1 due to the caressing plate 223 being too long. In other embodiments, the length of the caressing plate 223 may also be adjusted according to actual conditions.

[0058] When installing the tab anti-folding device, first place the roller 12 on the roller shaft 11, and place bearing blocks 13 at both ends of the roller 12 so that the roller 12 can only rotate but not move axially. Then, according to the bending angle of the pole piece 100 and the position of the tab 101, the bracket 21 is installed on the roller shaft 11, and the height-adjusted smoothing assembly 22 is fixed on the bracket 21 by tightening the nut, and then according to production needs, the guide block 222 is slid to make the smoothing plate 223 at the position where the tab 101 is most likely to be folded, and then the guide block 222 is fixed on the support rod 221 by fasteners, so that the tab 101 passes between the two smoothing plates 223.

[0059] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A tab anti-bend device, characterized in that: The pole lug anti-bending device comprises a roller mechanism (1), the roller mechanism (1) comprising a roller shaft (11) and a roller (12), the roller (12) being rotatably sleeved on the roller shaft (11), the roller (12) comprising a cylindrical section (121) and a conical section (122), the small diameter end of the conical section (122) being arranged on a side away from the pole piece (100), and the cylindrical section (121) being in close contact with the pole piece (100). The conical section (122) can cooperate with the pole ear (101) on the pole piece (100); the cylindrical section (121) and the conical section (122) are independently arranged, and when the pole ear (101) is folded, the pole ear (101) will drive the conical section (122) to rotate, and when the conical section (122) cooperates with the pole ear (101), the rotation speed can be adjusted according to the state of the pole ear (101).

2. The tab anti-bending device according to claim 1, characterized in that: The tab anti-bending device further comprises a tab smoothing mechanism (2), wherein two tab smoothing mechanisms (2) are respectively arranged at the inlet end and the outlet end of the roller (12).

3. The tab anti-bending device according to claim 2, characterized in that: The angle between the two tab smoothing mechanisms (2) is adjustable.

4. The tab anti-bending device according to claim 2, characterized in that: The tab smoothing mechanism (2) comprises: A bracket (21) is arranged on the roller shaft (11), and the bracket (21) is L-shaped; Two symmetrically arranged smoothing assemblies (22), wherein the smoothing assemblies (22) are arranged on the bracket (21), and the pole lug (101) passes through the two smoothing assemblies (22).

5. The tab anti-bending device according to claim 4, characterized in that: The bracket (21) comprises a mounting block (211) and a pressing block (212); the mounting block (211) is detachably connected to the pressing block (212); both the mounting block (211) and the pressing block (212) are provided with a semi-through hole; after the mounting block (211) and the pressing block (212) are connected, the two semi-through holes form a through hole; the roller shaft (11) is interference-fitted with the through hole.

6. The tab anti-bending device according to claim 4, characterized in that: The distance between the two smoothing components (22) is adjustable.

7. The tab anti-bending device according to claim 4, characterized in that: The smoothing component (22) comprises: A support rod (221) is arranged on the bracket (21); A guide block (222), wherein the guide block (222) is sleeved on the support rod (221); A stroking plate (223), the stroking plate (223) being fixed to the bottom surface of the guide block (222), and the pole lug (101) passing through two of the stroking plates (223).

8. The tab anti-bend device according to claim 7, characterized in that: The caressing plate (223) comprises: A plane, one side of the plane being connected to the bottom surface of the guide block (222), and the pole lug (101) passing through the other side of the plane of the two smoothing plates (223); Two arc surfaces are arranged opposite to each other, and the distance between the two arc surfaces gradually decreases along the direction in which the guide block (222) is connected to the plane.

9. A winding machine, characterized in that: It comprises a tab anti-bending device as claimed in any one of claims 1 to 8.

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