Pole lug flattening mechanism

Abstract

The utility model relates to the technical field of battery production, in particular to a tab flattening mechanism. The mechanism comprises a smoothing plate assembly and a follow-up assembly. The smoothing plate assembly is used for abutting against the outer side surface of the coiled tab; the follow-up assembly comprises a lead screw, a movable base connected to the lead screw in a threaded mode and a driving piece used for driving the lead screw to rotate, and the smoothing plate assembly is arranged on the movable base. In the working process of the mechanism, along with the increase of the number of battery cell winding turns, the driving piece drives the smoothing plate assembly to slowly follow and move through the lead screw and the movable seat, so that the smoothing plate assembly can stably and reliably abut against the outer side face of a tab all the time, the tab folding condition is improved, and the overall yield of equipment is greatly improved. The lead screw has the advantage of high controllability, the moving speed of the smoothing plate assembly is matched with the rolling speed of the battery cell by controlling the screw pitch and the rotating speed of the lead screw, and the smoothing effect on the tab is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to an ear flattening mechanism. Background Art

[0002] The main production method of the battery cell is to make it by winding. At present, when the pole piece with ears is wound around the winding needle, the stacked ears are very easy to fold over during the winding process, causing excessive deformation or even damage to the ears. Therefore, a flattening mechanism needs to be set up to flatten the ears.

[0003] However, the flattening mechanism in the prior art usually uses a cylinder to control the movement of the flattening plate. This structure can only ensure that the flattening plate is at a fixed position where a cylinder extends, and cannot well adapt to the change of the wire position caused by the increase of the number of turns of the battery cell during the winding process, thus causing the ears to fold over. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an ear flattening mechanism to solve the technical problem that the flattening plate in the prior art cannot well adapt to the change of the wire position caused by the increase of the number of turns of the battery cell during the winding process, thus causing the ears to fold over.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An ear flattening mechanism, comprising:

[0007] A flattening plate assembly, arranged on one side of the winding needle and close to the wire on the winding needle, for abutting against the outer side of the incoming ear of the pole piece;

[0008] A follow-up assembly, including a lead screw, a movable seat screwed on the lead screw, and a driving member for driving the lead screw to rotate, and the flattening plate assembly is installed on the movable seat.

[0009] Further, the flattening plate assembly includes a first flattening plate and a second flattening plate;

[0010] The first flattening plate is used for abutting against the outer side of the incoming ear of the first pole piece;

[0011] The second flattening plate is used for abutting against the outer side of the incoming ear of the second pole piece.

[0012] Further, the first flattening plate and / or the second flattening plate is rotatably and adjustably installed on the movable seat.

[0013] Further, the follower assembly further includes a first locking member; a first arc-shaped long hole is provided on the first leveling plate, and the first arc-shaped long hole is centered on the rotation axis of the first leveling plate; one end of the first locking member is provided with a first abutting structure, the other end of the first locking member passes through the first arc-shaped long hole and is connected to the movable seat, and the first leveling plate is clamped between the first abutting structure and the movable seat;

[0014] And / or, the follower assembly further includes a second locking member; a second arc-shaped long hole is provided on the second leveling plate, and the second arc-shaped long hole is centered on the rotation axis of the second leveling plate; one end of the second locking member is provided with a second abutting structure, the other end of the second locking member passes through the second arc-shaped long hole and is connected to the movable seat, and the second leveling plate is clamped between the second abutting structure and the movable seat.

[0015] Further, the movable seat includes a movable body and a connecting plate slidably and adjustably mounted on the movable body;

[0016] The first leveling plate and / or the second leveling plate is mounted on the connecting plate.

[0017] Further, the follower assembly further includes a third locking member; a linear long hole is provided on the connecting plate, one end of the third locking member is provided with a third abutting structure, the other end of the third locking member passes through the linear long hole and is connected to the movable body, and the connecting plate is clamped between the third abutting structure and the movable body.

[0018] Further, the wire inlet end of the first leveling plate is bent away from the first pole tab to form a first flanging;

[0019] And / or, the wire inlet end of the second leveling plate is bent away from the second pole tab to form a second flanging.

[0020] Further, the follower assembly further includes a guide rail and a slider slidably disposed on the guide rail, and the slider is connected to the movable seat.

[0021] Further, it further includes a mounting bracket;

[0022] One end of the lead screw is connected to the driving member, and the other end of the lead screw is rotatably connected to the mounting bracket;

[0023] The driving member is mounted on the mounting bracket.

[0024] Further, it further includes a cover plate;

[0025] The cover plate and the mounting bracket are connected to each other and enclose a receiving space, and the lead screw is disposed in the receiving space.

[0026] Advantages of the present utility model:

[0027] The tab flattening mechanism provided by the present utility model includes:

[0028] A flattening plate assembly, disposed on one side of the winding needle and close to the material line on the winding needle, for abutting against the outer side surface of the incoming tab.

[0029] A follow-up assembly, including a lead screw, a movable seat screwed on the lead screw, and a driving member for driving the lead screw to rotate, and the flattening plate assembly is mounted on the movable seat.

[0030] During the working process of the above mechanism, as the number of winding turns of the battery cell increases, the driving member drives the flattening plate assembly to slowly move along with the lead screw and the movable seat, so that the flattening plate assembly can always stably and reliably abut against the outer side surface of the tab, thereby improving the situation of tab folding and greatly improving the overall yield of the equipment. The lead screw has the advantage of high controllability. By controlling the pitch and rotation speed of the lead screw, the moving speed of the flattening plate assembly is adapted to the winding speed of the battery cell, further improving the flattening effect on the tab. Description of the drawings

[0031] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a front view of the tab flattening mechanism provided by the embodiment of the present utility model;

[0033] Figure 2 It is a three-dimensional structure diagram of the tab flattening mechanism provided by the embodiment of the present utility model from an angle;

[0034] Figure 3 It is a three-dimensional structure diagram of the tab flattening mechanism provided by the embodiment of the present utility model from another angle;

[0035] Figure 4 It is a three-dimensional structure diagram of the tab flattening mechanism provided by the embodiment of the present utility model with a cover plate added.

[0036] Icon:

[0037] 1 - Flattening plate assembly; 11 - First flattening plate; 111 - First arc-shaped long hole; 112 - First flange; 12 - Second flattening plate; 121 - Second arc-shaped long hole; 122 - Second flange;

[0038] 2 - Follow-up assembly; 21 - Lead screw; 22 - Movable seat; 221 - Movable body; 222 - Connecting plate; 2221 - Linear long hole; 23 - Driving member; 24 - Guide rail; 25 - Slide block;

[0039] 3 - Mounting bracket;

[0040] 4 - Cover plate. Detailed implementation mode

[0041] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0042] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or connected through an intermediate medium; it can be a mechanical connection, or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] The existing flattening plates are usually driven by air cylinders and cannot well adapt to the change in the position of the material line caused by the increase in the number of turns of the battery core during the winding process, resulting in the folding of the tab.

[0045] Based on this, the embodiment of the present invention provides an ear flattening mechanism. Referring to Figure 1 , this mechanism includes:

[0046] The flattening plate assembly 1 is arranged on one side of the winding needle and close to the material line on the winding needle, and is used to abut against the outer side of the tab being wound;

[0047] The follower assembly 2 includes a lead screw 21, a movable seat 22 screwed onto the lead screw 21, and a driving member 23 for driving the rotation of the lead screw 21. The flattening plate assembly 1 is installed on the movable seat 22.

[0048] During the working process of the above mechanism, as the number of winding turns of the battery cell increases, the driving member 23 drives the flattening plate assembly 1 to slowly move following through the lead screw 21 and the movable seat 22, so that the flattening plate assembly 1 can always stably and reliably abut against the outer side of the tab, thereby improving the situation of tab folding and greatly increasing the overall yield of the equipment. The lead screw 21 has the advantage of high controllability. By controlling the pitch and rotation speed of the lead screw, the moving speed of the flattening plate assembly 1 is adapted to the winding speed of the battery cell, further improving the flattening effect on the tab.

[0049] In this embodiment, the driving member 23 is a servo motor. Optionally, the output shaft of the driving member 23 can be connected to the lead screw 21 through a coupling, a gear, a pulley, etc.

[0050] Further, the flattening plate assembly 1 includes a first flattening plate 11 and a second flattening plate 12;

[0051] The first flattening plate 11 is used to abut against the outer side of the tab of the first pole piece entering the winding;

[0052] The second flattening plate 12 is used to abut against the outer side of the tab of the second pole piece entering the winding.

[0053] In this embodiment, the first pole piece and the second pole piece can be respectively set as the anode pole piece and the cathode pole piece. In other embodiments, the first pole piece and the second pole piece can also be respectively set as the cathode pole piece and the anode pole piece, without specific limitation.

[0054] In this embodiment, the flattening plates corresponding to the tabs of the first pole piece and the second pole piece are both installed on the movable seat 22, and the two flattening plates are driven to move simultaneously through the follower assembly 2, so that the two flattening plates move together with the position of the material line as the number of winding turns of the battery cell increases, thereby achieving the effect of simultaneously flattening the tabs of the first pole piece and the second pole piece.

[0055] Refer to Figure 2 , the first flattening plate 11 and / or the second flattening plate 12 are rotatably and adjustably installed on the movable seat 22. The above setting can realize that the inclination angle of the flattening plate relative to the horizontal plane is adjustable, so that the inclination direction of the flattening plate is consistent with the winding direction of the tab, ensuring the flattening effect.

[0056] Specifically, the follower assembly 2 further includes a first locking member; a first arc-shaped long hole 111 is provided on the first leveling plate 11, and the first arc-shaped long hole 111 is centered on the rotation axis of the first leveling plate 11; one end of the first locking member is provided with a first abutting structure, and the other end of the first locking member passes through the first arc-shaped long hole 111 and is connected to the movable seat 22, and the first leveling plate 11 is clamped between the first abutting structure and the movable seat 22;

[0057] And / or, the follower assembly 2 further includes a second locking member; a second arc-shaped long hole 121 is provided on the second leveling plate 12, and the second arc-shaped long hole 121 is centered on the rotation axis of the second leveling plate 12; one end of the second locking member is provided with a second abutting structure, and the other end of the second locking member passes through the second arc-shaped long hole 121 and is connected to the movable seat 22, and the second leveling plate 12 is clamped between the second abutting structure and the movable seat 22.

[0058] Taking the example that the first leveling plate 11 is rotatably and adjustably installed on the movable seat 22. The first leveling plate 11 includes a leveling portion and a rotating portion connected at an angle (for example, 90°), wherein the leveling portion is used to abut against the outer side of the first pole piece tab of the incoming coil, and the rotating portion is used to be pivotally connected to the movable seat 22, and the first arc-shaped long hole 111 is specifically provided on the pivotal connection portion; the first locking member can specifically be a bolt, and the bolt head of the first locking member is the first abutting structure, and the end of the first locking member away from the bolt head passes through the first arc-shaped long hole 111 and is screwed to the movable seat 22 (or can be locked by a nut). When it is necessary to adjust the inclination angle of the first leveling plate 11, loosen the first locking member to release the first leveling plate 11 by the first abutting structure and the movable seat 22; then rotate the first leveling plate 11 to a suitable angle; subsequently, tighten the first locking member to clamp the first leveling plate 11 by the first abutting structure and the movable seat 22, and fix the first leveling plate 11 on the movable seat 22.

[0059] The connection structure between the second leveling plate 12 and the movable seat 22 is the same as described above, and will not be elaborated here.

[0060] Continue to refer to Figure 2 , the movable seat 22 includes a movable body 221, a connecting plate 222 slidably and adjustably installed on the movable body 221, and a nut fixed on the movable body 221, and the nut is screwed on the lead screw 21.

[0061] In this embodiment, the movable body 221 is sleeved on the nut, and the two are fixedly connected to each other by a plurality of screws.

[0062] Based on the above structure, the first leveling plate 11 and / or the second leveling plate 12 are installed on the connecting plate 222. Since the connecting plate 222 is slidably and adjustably installed on the movable body 221, the first leveling plate 11 and / or the second leveling plate 12 installed on the connecting plate 222 can simultaneously achieve rotation and sliding adjustment, with more flexible adjustability and better applicability.

[0063] In this embodiment, the first leveling plate 11 is rotatably and adjustably installed on the movable body 221, the second leveling plate 12 is rotatably and adjustably installed on the connecting plate 222, and the rotation axes of the first leveling plate 11 and the second leveling plate 12 are parallel; the connecting plate 222 is slidably and adjustably connected to the movable body 221 in a direction perpendicular to the rotation axes of the first leveling plate 11 and the second leveling plate 12. The above structure can adjust the relative positions and the included angle between the first leveling plate 11 and the second leveling plate 12, further improving the applicability.

[0064] Continue to refer to Figure 2 , a plurality of installation positions are spaced on the connecting plate 222, and at each installation position, there is a pivot hole for pivotally connecting with the second leveling plate 12 and a locking hole for fixing the second locking member. The second leveling plate 12 can be installed at any one of the installation positions. By means of the multiple installation positions, various tab types can be compatible, further improving the applicability.

[0065] Based on the above structure, the follower assembly 2 further includes a third locking member; a linear long hole 2221 is provided on the connecting plate 222, one end of the third locking member is provided with a third abutting structure, and the other end of the third locking member passes through the linear long hole 2221 and is connected to the movable body 221, and the connecting plate 222 is clamped between the third abutting structure and the movable body 221.

[0066] In order to improve the connection stability between the movable body 221 and the connecting plate 222, the number of the linear long holes 2221 can be multiple. Exemplarily, in this embodiment, the number of the linear long holes 2221 is two.

[0067] Specifically, the third locking member can be specifically a bolt, the bolt head of the third locking member is the first abutting structure, and the end of the third locking member away from the bolt head passes through the linear long hole 2221 and is screwed to the movable body 221.

[0068] Continue to refer to Figure 2 , the wire inlet end of the first leveling plate 11 is bent away from the first tab of the first pole piece to form a first flanging 112;

[0069] and / or, the wire inlet end of the second leveling plate 12 is bent away from the second tab of the second pole piece to form a second flanging 122.

[0070] By setting the first flanging 112 and the second flanging 122, it is avoided that the tab is scratched by the end of the flattening plate during the process of the tab entering the roll, which is convenient for the tab to enter the line.

[0071] Refer to Figure 3 , the follower assembly 2 further includes a guide rail 24 and a slider 25 slidably disposed on the guide rail 24, and the slider 25 is connected to the movable seat 22. The movement direction of the flattening plate assembly 1 can be restricted by the guide rail 24 and the slider 25, so that the flattening plate assembly 1 can move smoothly along a predetermined trajectory.

[0072] Furthermore, the tab flattening mechanism further includes a mounting bracket 3;

[0073] One end of the lead screw 21 is connected to the driving member 23, and the other end of the lead screw 21 is rotatably connected to the mounting bracket 3;

[0074] Both the driving member 23 and the guide rail 24 are mounted on the mounting bracket 3.

[0075] The tab flattening mechanism can be made into a whole through the mounting bracket 3, which is convenient for disassembly, taking and placing from the whole machine.

[0076] Refer to Figure 4 , the tab flattening mechanism further includes a cover plate 4;

[0077] The cover plate 4 is connected to the mounting bracket 3 and the two enclose a receiving space. The lead screw 21, the guide rail 24 and the slider 25 are all arranged in the receiving space. A part of the structure of the movable seat 22 extends into the receiving space and is fixed on the slider 25, and another part of the structure of the movable seat 22 is located outside the receiving space and is connected to the flattening plate assembly 1. The receiving space can prevent dust and other impurities from accumulating on the workpieces inside it, and can also make the whole mechanism clean and beautiful.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tab smoothing mechanism, characterized in that: include: A smoothing plate assembly (1) is arranged on one side of the winding needle and close to the material line on the winding needle, and is used to abut against the outer side surface of the electrode ear being wound; The follower assembly (2) comprises a screw rod (21), a movable seat (22) screwed on the screw rod (21), and a driving member (23) for driving the screw rod (21) to rotate. The smoothing plate assembly (1) is mounted on the movable seat (22).

2. The tab smoothing mechanism according to claim 1, characterized in that: The caressing plate assembly (1) comprises a first caressing plate (11) and a second caressing plate (12); The first smoothing plate (11) is used to abut against the outer side surface of the first pole piece ear that is rolled in; The second smoothing plate (12) is used for abutting against the outer side surface of the rolled-in second pole piece ear.

3. The tab smoothing mechanism according to claim 2, characterized in that: The first caressing plate (11) and / or the second caressing plate (12) are rotatably and adjustably mounted on the movable seat (22).

4. The tab smoothing mechanism according to claim 3, characterized in that: The follower assembly (2) further comprises a first locking member; a first arc-shaped long hole (111) is provided on the first caressing plate (11), and the first arc-shaped long hole (111) takes the rotation axis of the first caressing plate (11) as its center; a first abutment structure is provided at one end of the first locking member, and the other end of the first locking member passes through the first arc-shaped long hole (111) and is connected to the movable seat (22), and the first caressing plate (11) is clamped between the first abutment structure and the movable seat (22); And / or, the follower assembly (2) further comprises a second locking member; a second arc-shaped long hole (121) is provided on the second caressing plate (12), and the second arc-shaped long hole (121) is centered on the rotation axis of the second caressing plate (12); a second abutment structure is provided at one end of the second locking member, and the other end of the second locking member passes through the second arc-shaped long hole (121) and is connected to the movable seat (22), and the second caressing plate (12) is clamped between the second abutment structure and the movable seat (22).

5. The tab smoothing mechanism according to claim 3, characterized in that: The movable seat (22) comprises a movable body (221) and a connecting plate (222) slidably and adjustably mounted on the movable body (221); The first caressing plate (11) and / or the second caressing plate (12) are mounted on the connecting plate (222).

6. The tab smoothing mechanism according to claim 5, characterized in that: The follower assembly (2) further comprises a third locking member; a straight long hole (2221) is provided on the connecting plate (222); a third abutment structure is provided at one end of the third locking member; the other end of the third locking member passes through the straight long hole (2221) and is connected to the movable body (221); the connecting plate (222) is clamped between the third abutment structure and the movable body (221).

7. The tab smoothing mechanism according to claim 2, characterized in that: The wire inlet end of the first caressing plate (11) is bent in a direction away from the first pole piece ear to form a first flange (112); And / or, the wire inlet end of the second smoothing plate (12) is bent in a direction away from the second pole piece ear to form a second flange (122).

8. The tab smoothing mechanism according to claim 1, characterized in that: The follower assembly (2) further comprises a guide rail (24) and a slider (25) slidably arranged on the guide rail (24); the slider (25) is connected to the movable seat (22).

9. The tab smoothing mechanism according to any one of claims 1 to 8, characterized in that: Also includes a mounting frame (3); One end of the screw rod (21) is connected to the driving member (23), and the other end of the screw rod (21) is rotatably connected to the mounting frame (3); The driving member (23) is mounted on the mounting frame (3).

10. The tab smoothing mechanism according to claim 9, characterized in that: Also includes a cover plate (4); The cover plate (4) and the mounting frame (3) are connected and the two enclose a containing space, and the screw rod (21) is arranged in the containing space.

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