Pole lug flattening device

Abstract

The utility model discloses a pole lug flattening device, which is applied to a coiling included angle of a coiler and comprises a first connecting rod, a second connecting rod and a flattening block, the smoothing block is detachably connected with the first connecting rod, and the first connecting rod is movably connected with the second connecting rod; the end, close to the second connecting rod, of the first connecting rod is provided with a first through hole, a first clamping block and a second clamping block, the first clamping block and the second clamping block are symmetrically arranged, the second connecting rod comprises an extending part and a rotating part, the extending part penetrates through the first through hole, and the rotating part penetrates through the first through hole. And the rotating part is sleeved on an external negative electrode film combining roller. According to the utility model, the problem that the tab folded into the included angle cannot be centralized due to the limitation of the space at the included angle in the winding process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery core preparation and relates to a tab smoothing device. Background Art

[0002] During the manufacturing process of lithium battery cells, the tabs folded into the coating area will cause short circuits in the cells or lithium deposition short circuits in the later stages of the cell cycle, which can seriously cause cell fires. Currently, in the manufacturing process of batteries, there are corresponding means to prevent and detect tab folding, but due to the limited space at the winding angle during the winding process, the existing means cannot straighten or detect the tabs folded into the angle. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a tab smoothing device, which solves the problem that the tab folded at the angle cannot be straightened due to the space limitation at the angle of winding in the winding process of the winding machine.

[0004] The technical solution of the utility model is: the utility model provides a tab smoothing device, which is applied to the winding angle of the winding machine, and comprises: a first connecting rod, a second connecting rod and a smoothing block; the smoothing block is detachably connected to the first connecting rod, and the first connecting rod is movably connected to the second connecting rod;

[0005] A first through hole, a first tightening block and a second tightening block are provided at one end of the first connecting rod close to the second connecting rod. The first tightening block and the second tightening block are symmetrically arranged. The second connecting rod includes an extension part and a rotating part. The extension part passes through the first through hole, and the rotating part is sleeved on the external negative electrode film roller.

[0006] Furthermore, the smoothing block includes a first side wall and a second side wall that are symmetrically arranged, and an angle between the first side wall and the second side wall is an acute angle.

[0007] Furthermore, the smoothing block also includes a third side wall, which is arranged between the first side wall and the second side wall, the axis of the first connecting rod is perpendicular to the third side wall, and one end of the first connecting rod close to the smoothing block is detachably connected to the third side wall by screws.

[0008] Furthermore, the first side wall and the second side wall are both smooth curved surfaces.

[0009] Further, the cross-section of the first through hole is the same as the cross-section area and shape of the extension portion.

[0010] Furthermore, two sets of bolt locking are arranged between the first tightening block and the second tightening block.

[0011] Furthermore, the extending portion is fixedly connected to the rotating portion, and an axis of the extending portion is perpendicular to an axis of the rotating portion.

[0012] Furthermore, the rotating part is symmetrically provided with a first top screw and a second top screw along the radial direction, and both the first top screw and the second top screw pass through the rotating part and abut against the negative electrode film roller.

[0013] Furthermore, the rotating part includes a second through hole arranged along the axial direction, and the negative electrode film roller is plugged into the second through hole.

[0014] Furthermore, the first connecting rod, the second connecting rod and the smoothing block are all made of metal.

[0015] The beneficial effects of the utility model are as follows: the utility model provides a tab smoothing device, which is provided with a first connecting rod, a second connecting rod and a smoothing block, wherein the first connecting rod is movably connected to the second connecting rod, an extension portion on the second connecting rod passes through the first through hole of the first connecting rod, and the distance between the smoothing block and the battery cell that needs to smooth the tab is adjusted, the first tightening block and the second tightening block are symmetrically arranged, and the first connecting rod and the second connecting rod are locked after adjustment, and a rotating portion is provided at one end of the second connecting rod, and the rotating portion is sleeved on the negative electrode film roller to adjust the angle between the smoothing device and the battery cell that needs to be smoothed. The smoothing device can smooth and correct the folded tab, and prevent the battery cell from being rolled into the electrode film coating area after being rolled, causing lithium deposition or short circuit of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the structure of a tab smoothing device provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure at the angle of a winding machine provided in an embodiment of the present application.

[0019] Description of reference numerals:

[0020] 1-smoothing block, 2-first connecting rod, 3-second connecting rod, 4-negative electrode film roller, 5-negative electrode sheet, 6-positive electrode sheet, 7-winding needle;

[0021] 11-first side wall, 12-second side wall, 13-third side wall, 21-first through hole, 22-first clamping block, 23-second clamping block, 31-extension part, 32-rotation part, 321-second through hole, 51-negative pole ear, 61-positive pole ear. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the present invention, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0024] The following is a detailed description of the implementation of the present invention in conjunction with the specific drawings:

[0025] Figure 1 A schematic diagram of the structure of a tab smoothing device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the tab smoothing device provided by the present application includes: a smoothing block 1, a first connecting rod 2 and a second connecting rod 3, the smoothing block 1 is detachably connected to the first connecting rod 2, and the first connecting rod 2 is movably connected to the second connecting rod 3. The smoothing block 1 is an inverted triangle block, and the smoothing block 1 includes a first side wall 11, a second side wall 12 and a third side wall 13. The first side wall 11 and the second side wall 12 are symmetrically arranged, and the angle between the first side wall 11 and the second side wall 12 is an acute angle, which is the same as the angle between the negative electrode sheet and the positive electrode sheet in the winding machine. It can smooth the tabs with a folding angle of less than 120° before the positive and negative electrode sheets are rolled, and prevent the battery cell from being rolled into the electrode film coating area after rolling, causing lithium deposition or short circuit of the battery cell. The third side wall 13 is arranged between the first side wall 11 and the second side wall 12, and the first side wall 11 and the second side wall 12 are both smooth arc surfaces, which prevent the smoothing block 1 from scratching the positive electrode sheet 5 and the negative electrode sheet 6 during the smoothing process. The smoothing block 1 , the first connecting rod 2 , and the second connecting rod 3 are all made of metal to reduce friction between the negative electrode sheet 5 and the positive electrode sheet 6 .

[0026] One end of the first connecting rod 2 is connected to the third side wall 13 by a screw structure, and the axis of the first connecting rod 2 is perpendicular to the third side wall 13. The first connecting rod 2 includes a first through hole 21, a first tightening block 22 and a second tightening block 23, the first tightening block 22 and the second tightening block are symmetrically arranged, and an adjustment gap is provided in the middle, and the first tightening block 22 and the second tightening block 23 are connected by two sets of bolt structures, which are used to lock the first tightening block 22 and the second tightening block 23 after adjusting the relative position of the first connecting rod 2 and the second connecting rod so that they no longer slide, adjust the smoothing block 1 to a suitable distance, and adjust the smoothing effect of the smoothing block 1 to the best.

[0027] The second connecting rod 3 includes an extension portion 31 and a rotating portion 32. The extension portion 31 is plugged into the first through hole 21. The area and shape of the cross section of the extension portion 31 are the same as those of the first through hole 21. By adjusting the position of the extension portion 31 in the first through hole 21, the distance between the smoothing mechanism and the positive electrode sheet is adjusted. The extension portion 31 is fixedly connected to the rotating portion 32, and the axis of the extension portion 31 is perpendicular to the axis of the rotating portion 32. The entire second connecting rod 3 acts as a crank to control the rotational movement of the entire smoothing device. A second through hole 321 is provided in the rotating portion 32. The negative electrode film roller 4 passes through the second through hole 321 and is plugged into the second connecting rod 3. The diameter of the negative electrode film roller 4 is slightly smaller than the diameter of the second through hole 321, which facilitates the rotation and adjustment of the angle of the second connecting rod 32. The middle part of the rotating portion 32 is symmetrically provided with a first top screw and a second top screw (not shown in the figure) along the radial direction. The first top screw and the second top screw are respectively abutted against the negative electrode film roller 4, and are used to fix the smoothing device after rotating to a suitable angle on the negative electrode film roller.

[0028] Figure 2 A schematic diagram of the structure of a winding machine at an angle provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the second connecting rod 3 is sleeved on the negative electrode film roller 4, and the smoothing device is rotated to a suitable position by rotating the second connecting rod 3. The smoothing block 1 is arranged between the positive electrode sheet 6 and the negative electrode sheet 5, and is used to smooth the positive electrode tab 61 on the positive electrode sheet 6 and the negative electrode tab 51 on the negative electrode sheet 5 to prevent folding during the winding process. The positive electrode sheet 6 and the negative electrode sheet 5 are wound into the winding needle 7, and the smoothing device is installed at the angle of the winding machine. By adjusting the relative distance between the first connecting rod 2 and the second connecting rod 3, and the rotation angle between the second connecting rod 3 and the negative electrode film roller 4, the folded tabs are smoothed to a good state through the arc surface on the smoothing block 1, so as to prevent the folded tabs from overlapping the negative electrode sheet 5 before being wound into the winding needle 7, resulting in short circuit failure of the battery cell.

[0029] Obviously, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0030] Note that in the description of this specification, the reference terms "some embodiments", "other embodiments", etc., mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. A tab smoothing device, applied to the winding angle of a winding machine, characterized in that: include: A first connecting rod, a second connecting rod and a smoothing block; the smoothing block is detachably connected to the first connecting rod, and the first connecting rod is movably connected to the second connecting rod; A first through hole, a first tightening block and a second tightening block are provided at one end of the first connecting rod close to the second connecting rod. The first tightening block and the second tightening block are symmetrically arranged. The second connecting rod includes an extension part and a rotating part. The extension part passes through the first through hole, and the rotating part is sleeved on the external negative electrode film roller.

2. A tab smoothing device as claimed in claim 1, characterized in that: The smoothing block includes a first side wall and a second side wall that are symmetrically arranged, and an angle between the first side wall and the second side wall is an acute angle.

3. A tab smoothing device as claimed in claim 2, characterized in that: The smoothing block also includes a third side wall, which is arranged between the first side wall and the second side wall. The axis of the first connecting rod is perpendicular to the third side wall, and one end of the first connecting rod close to the smoothing block is detachably connected to the third side wall by screws.

4. A tab smoothing device as claimed in claim 3, characterized in that: The first side wall and the second side wall are both smooth curved surfaces.

5. The tab smoothing device according to claim 1, characterized in that: The cross-section of the first through hole is the same as the cross-section area and shape of the extending portion.

6. The tab smoothing device according to claim 1, characterized in that: Two sets of bolts are arranged between the first tightening block and the second tightening block for locking.

7. The tab smoothing device according to claim 1, characterized in that: The extending portion is fixedly connected to the rotating portion, and an axis of the extending portion is perpendicular to an axis of the rotating portion.

8. The tab smoothing device according to claim 7, characterized in that: The rotating part is symmetrically provided with a first top screw and a second top screw along the radial direction. Both the first top screw and the second top screw pass through the rotating part and abut against the negative electrode film roller.

9. A tab smoothing device as claimed in claim 8, characterized in that: The rotating part comprises a second through hole arranged along the axial direction, and the negative electrode film-joining roller is plugged into the second through hole.

10. The tab smoothing device according to claim 9, characterized in that: The first connecting rod, the second connecting rod and the smoothing block are all made of metal.

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