Smoothing mechanism and battery cell winding device

Abstract

The utility model provides a smoothing mechanism and a battery cell winding device, which relate to the technical field of winding equipment; a smoothing plate and an adjusting component are provided at the end of the core shaft of the first film-forming roller facing the winding needle; when the material line of the winding needle gradually increases, the smoothing plate can move with the core shaft to adapt to the change of the material line position; at the same time, since the smoothing plate and the core shaft are elastically connected by an elastic component, the elastic force control of the elastic component can be used to adjust the angle of the smoothing plate by external force, thereby avoiding interference of the smoothing plate during processes such as clamping the diaphragm, alleviating the technical problem that the smoothing plate in the prior art is in a fixed position where a cylinder is extended and cannot well adapt to the folding of the pole ear caused by the change of the material line position caused by the increase in the number of battery cell turns during the winding process, thereby improving the yield rate of battery cell winding production.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core winding equipment, in particular to a smoothing mechanism and a battery core winding device. Background Art

[0002] Cell winding is a manufacturing process that winds the anode, separator and cathode layers in a certain way to form a cell. The purpose is to ensure that each lithium ion has a corresponding carbon ion combined with it. Therefore, the quality of the cell winding process directly affects the quality and service life of the lithium battery. Compared with flat batteries, wound batteries are made of high-voltage winding of plates with a thickness of only about 1mm. They have the advantages of wide high and low temperature performance, super high-rate discharge capability and solid structure, and have excellent seismic performance.

[0003] When the anode, diaphragm and cathode layers are put into winding needle for winding, it is usually necessary to set a smoothing plate to prevent the pole ear from bending, which can effectively avoid deformation, folding and other problems during the transmission of the pole ear and ensure product quality. However, in the prior art, before smoothing the pole ear, the setting of the smoothing plate will affect the parallelization of the diaphragm. Utility Model Content

[0004] The utility model aims to provide a smoothing mechanism and a battery core winding device to adjust the angle of the smoothing plate to avoid technical problems affecting the membrane bonding.

[0005] In a first aspect, the utility model provides a smoothing mechanism, comprising a first film-stitching roller, a smoothing plate and an adjustment assembly, wherein the first film-stitching roller has a core shaft, the smoothing plate is elastically connected to the core shaft through the adjustment assembly, and the smoothing plate can be driven to rotate around the core shaft and reset under the action of the adjustment assembly.

[0006] In combination with the first aspect, the utility model provides a first possible implementation of the first aspect, wherein the adjustment assembly includes a fixed shaft, an elastic member and a limit plate, one end of the fixed shaft is connected to the core shaft, and the other end is connected to the limit plate, and the smoothing plate is connected to the fixed shaft through the elastic member;

[0007] The limiting plate is used to adjust the initial position of the smoothing plate.

[0008] In combination with the first possible implementation of the first aspect, the utility model provides a second possible implementation of the first aspect, wherein an extension column is provided on the limiting plate in a direction toward the smoothing plate.

[0009] In combination with the second possible implementation of the first aspect, the utility model provides a third possible implementation of the first aspect, wherein the elastic member is a scroll spring, and the scroll spring is sleeved on the outer side of the fixed shaft.

[0010] In combination with the third possible implementation of the first aspect, the utility model provides a fourth possible implementation of the first aspect, which further includes a shell, the volute spring and the fixed shaft are arranged in the shell, and the end of the fixed shaft connected to the limit plate extends out of the shell; one end of the volute spring is clamped to the fixed shaft, and the other end of the volute spring is clamped to the shell.

[0011] In combination with the fifth possible implementation of the first aspect, the utility model provides a fifth possible implementation of the first aspect, wherein a connecting block is provided at one end of the caressing plate facing the shell, and the caressing plate is detachably connected to the shell through the connecting block.

[0012] In combination with the fifth possible implementation of the first aspect, the utility model provides a sixth possible implementation of the first aspect, wherein the connecting block is arranged at the end of the smoothing plate facing the limiting plate, and the extension column abuts against the connecting block.

[0013] In combination with the sixth possible implementation of the first aspect, the utility model provides a seventh possible implementation of the first aspect, wherein:

[0014] The first film-forming roller is arranged on one side of the winding needle and close to the material line of the winding needle. The smoothing plate can be driven to move in a direction perpendicular to the material line, approaching or moving away from the winding needle.

[0015] In combination with the sixth possible implementation of the first aspect, the utility model provides an eighth possible implementation of the first aspect, wherein the first film-forming roller also includes a roller, the roller is rotatably mounted on the core shaft through a bearing, and the roller rotates with the transmission of the material line.

[0016] In a second aspect, the utility model further provides a battery cell winding device, comprising the smoothing mechanism described above; and further comprising a second film-forming roller, wherein the second film-forming roller is driven to approach or move away from the first film-forming roller;

[0017] When the second film-forming roller approaches the first film-forming roller, the smoothing plate is pushed to rotate around the core shaft;

[0018] When the second film-forming roller moves away from the first film-forming roller, the smoothing plate rotates in the opposite direction under the action of the adjusting component.

[0019] The embodiments of the utility model bring about the following beneficial effects: a method is adopted in which a caressing plate and an adjusting component are provided at the end of the core shaft of the first film-joining roller, wherein the caressing plate is elastically connected to one end of the core shaft through the adjusting component; since the caressing plate and the core shaft are elastically connected through the elastic component, the angle of the caressing plate can be adjusted by external force by utilizing the elastic force control of the elastic component, that is, when external force is applied, the caressing plate rotates in the direction of the external force, and when the external force is removed, the caressing plate returns to its original position by utilizing the elastic force, thereby avoiding interference caused by the caressing plate during processes such as clamping the diaphragm, thereby improving the film-joining effect and the yield rate of the battery cell winding production. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the overall structure of a smoothing device provided in an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of an elastic component in a smoothing device provided in an embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the connection structure between the elastic component and the smoothing plate in the smoothing device provided in an embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the positions of the smoothing plate when the first film-forming roller and the second film-forming roller in the smoothing device provided in an embodiment of the utility model clamp the diaphragm;

[0025] Figure 5 A schematic diagram of the positions of the first film-forming roller and the second film-forming roller in the smoothing device provided in the embodiment of the utility model when the electrode piece is inserted;

[0026] Figure 6 A schematic diagram of adjusting the position of a smoothing plate when the battery cell in the smoothing device provided by an embodiment of the utility model gradually becomes larger.

[0027] Icons: 10 - first film-joining roller; 20 - second film-joining roller; 30 - winding needle; 40 - caressing plate; 41 - connecting block; 50 - diaphragm; 60 - pole piece; 70 - battery cell; 80 - mounting plate; 100 - adjustment assembly; 110 - fixed shaft; 120 - elastic part; 130 - limit plate; 140 - extension column. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1 - Figure 3 As shown, the utility model provides a smoothing mechanism, including a first film-forming roller 10, a smoothing plate 40 and an adjusting assembly 100. The first film-forming roller 10 has a core shaft, and the smoothing plate 40 is elastically connected to the core shaft through the adjusting assembly 100. The smoothing plate 40 can be driven to rotate around the core shaft and reset under the action of the adjusting assembly 100.

[0032] The end of the core shaft of the first film-forming roller 10 is provided with a caressing plate 40 and an adjusting component 100, wherein the caressing plate 40 is elastically connected to one end of the core shaft through the adjusting component 100, and the caressing plate 40 can be driven to rotate around the core shaft and reset under the action of the adjusting component 100. Since the caressing plate 40 and the core shaft are elastically connected through the elastic component, the angle of the caressing plate 40 can be adjusted by external force by utilizing the elastic force control of the elastic component, that is, when external force is applied, the caressing plate 40 rotates in the direction of the external force, and when the external force is removed, the caressing plate 40 returns to its original position by utilizing the elastic force, thereby avoiding interference caused by the caressing plate 40 during processes such as clamping the diaphragm 50, thereby improving the film-forming effect and the yield rate of the winding production of the battery cell 70.

[0033] Furthermore, the adjustment assembly 100 includes a fixed shaft 110, an elastic member 120 and a limit plate 130, one end of the fixed shaft 110 is connected to the core shaft, and the other end is connected to the limit plate 130, and the smoothing plate 40 is connected to the fixed shaft 110 through the elastic member 120;

[0034] The limiting plate 130 is used to limit the movement of the smoothing plate 40 .

[0035] Furthermore, an extension column 140 is provided on the limiting plate 130 in a direction facing the smoothing plate 40 .

[0036] In this embodiment, a fixed shaft 110 is provided at the end of the core shaft to provide a connection foundation for the connection of the caressing plate 40. At the same time, in order to control the caressing plate 40 at a suitable angle, a limit plate 130 is detachably connected to the outer side of the fixed shaft 110, that is, the caressing plate 40 and the limit plate 130 are both connected to the same fixed shaft 110; the detachable connection of the limit plate 130 can adjust the rotation of the limit plate 130 around the fixed shaft 110 according to the required angle of the caressing plate 40, and then adjust the rotation of the extension column 140, and fix the limit plate 130 to the fixed shaft 110 at a determined position, and the extension column 140 limits the position of the caressing plate 40. In other embodiments, the limit plate 130 can also be directly connected to the caressing plate 40 to limit the position of the caressing plate 40.

[0037] The caressing plate 40 is connected to the fixed shaft 110 through the elastic member 120. The elastic force of the elastic member 120 exerts a force on the caressing plate 40 to rotate around the fixed shaft 110 and approach the extension column 140. The rotation of the caressing plate 40 is blocked by the setting of the extension column 140, thereby achieving the setting of the initial position of the caressing plate 40.

[0038] It should be noted that the limit plate 130 is installed on the outside of the fixed shaft 110. In order to increase the contact area between the limit plate 130 and the smoothing plate 40, an extension column 140 is provided on the limit plate 130 in the direction facing the smoothing plate 40; at the same time, the extension column 140 can be detachably connected to the limit plate 130 by threaded connection, plug-in, etc.

[0039] Furthermore, the elastic member 120 is a spiral spring, which is sleeved on the outer side of the fixed shaft 110 , and one end of the fixed shaft 110 extending out of the spring is connected to the limiting plate 130 .

[0040] In this embodiment, the elastic member 120 can be set up by a spiral spring. By sleeved the spiral spring on the outer side of the fixed shaft 110, it is easy to install and save space. The limit plate 130 can be connected to one end of the spiral spring extending from the fixed shaft 110 by threaded connection, plug-in, etc. The spiral spring acts on the rotation of the caressing plate 40 along the fixed shaft 110. The limit plate 130 limits the caressing plate 40 from the other end of the fixed shaft 110 through the extension column 140; one end of the spiral spring is clamped on the fixed shaft 110, and the other end can be directly connected to the caressing plate 40.

[0041] In other embodiments, the elastic member 120 may also be configured as a tension spring to provide a force on the caressing plate 40 in a direction close to the extension column 140 . Other mounting structures may be configured adaptively.

[0042] Furthermore, it also includes a shell, the spiral spring and the fixed shaft 110 are arranged in the shell, and one end of the fixed shaft 110 connected to the limiting plate 130 extends out of the shell.

[0043] The setting of the shell can provide external protection for the spiral spring and the fixed shaft 110. At the same time, the outer wall of the shell is also connected to the caressing plate 40, and the end of the fixed shaft 110 connected to the limiting plate 130 extends out of the shell. When the limiting plate 130 is installed, the extension column 140 extends from the outside of the fixed shaft 110 to the inside to limit the caressing plate 40.

[0044] Furthermore, a connecting block 41 is provided at one end of the caressing plate 40 facing the shell, and the caressing plate 40 is detachably connected to the shell through the connecting block 41 .

[0045] Furthermore, the connection block 41 is disposed at the end of the smoothing plate 40 facing the limiting plate 130 , and the extension column 140 abuts against the connection block 41 .

[0046] Furthermore, one end of the spiral spring is clamped to the fixed shaft 110 , and the other end is clamped to the connecting block 41 .

[0047] The elastic connection structure between the smoothing plate 40 and the fixed shaft 110 in this embodiment is as follows: one end of the spiral spring is clamped to the fixed shaft 110, and the other end of the spiral spring is clamped to the connecting block 41. Such an arrangement can ensure elastic force transmission and is easy to install.

[0048] It should be noted that the caressing plate 40 can be detachably connected to the housing by threaded connection through the connecting block 41, and the connecting block 41 is arranged at the end of the caressing plate 40 facing the limiting plate 130 to provide space for the connection between the caressing plate 40 and the elastic member 120.

[0049] Furthermore, the first film roller 10 is rotatably mounted on the core shaft through a bearing, and the core shaft is mounted on a mounting plate 80. The first film roller 10 is arranged on one side of a winding needle 30 and is close to the material line of the winding needle 30. The mounting plate 80 is connected to a driving member, and the driving member drives the smoothing plate 40 to approach or move away from the winding needle in a direction perpendicular to the material line.

[0050] During the winding process, as the number of turns of the battery cell 70 on the winding needle 30 increases, the caressing plate 40 can slowly follow the position of the material line along with the first film-forming roller 10. The specific driving component can be driven by a motor to gradually move the first film-forming roller 10 away from the winding needle 30, so that the caressing plate 40 and the pole piece 60 always maintain a relatively ideal relative position.

[0051] The driving part is driven by a motor, which alleviates the technical problem of the prior art that a cylinder is used near the winding needle 30 to control the smoothing plate 40, which can only ensure that the smoothing plate 40 is in a fixed position where the cylinder is extended, and cannot adapt well to the technical problem of the folding of the pole ear caused by the change of the material line position caused by the increase in the number of turns of the battery cell 70 during the winding process.

[0052] Furthermore, if Figure 4 - Figure 6 As shown, it also includes a second film-forming roller 20. When the diaphragm 50 is film-formed, the second film-forming roller 20 moves toward the first film-forming roller 10 to a limit position, pushing the caressing plate 40 to rotate;

[0053] The caressing plate 40 rotates along the core shaft, and under the thrust of the second film-forming roller 20 , a space is left for the film 50 on the first film-forming roller 10 and the film 50 on the second film-forming roller 20 to be clamped with the winding needle 30 after the film 50 on the first film-forming roller 10 and the film 50 on the second film-forming roller 20 are formed.

[0054] In this embodiment, the winding step includes three stages: clamping the diaphragm 50, the pole piece 60, inserting the diaphragm 50, and winding the pole piece 60 around the winding needle 30 to form the battery cell 70, and gradually increasing the diameter of the battery cell 70 and adjusting the flat plate 40;

[0055] like Figure 4 As shown, during the stage of clamping the membrane 50 , the second film-forming roller 20 gradually moves toward the first film-forming roller 10 and pushes the smoothing plate 40 to provide space for the film-forming process of the membrane 50 in the first film-forming roller 10 and the second film-forming roller 20 .

[0056] like Figure 5 As shown, during the electrode piece 60 insertion stage, the second film-forming roller 20 gradually moves away from the first film-forming roller 10, and the smoothing plate 40 gradually returns to its original position under the action of the elastic member 120, parallel to the electrode piece 60, and smoothes the electrode ears on the edge of the electrode piece 60.

[0057] like Figure 6As shown, during the adjustment stage of the caressing plate 40 when the diameter of the battery cell 70 gradually increases, as the number of winding turns of the battery cell 70 increases, the caressing plate 40 can, under the action of the driving member, slowly follow the position of the material line along with the first film roller 10, so that the caressing plate 40 and the pole piece 60 always maintain a relatively ideal relative position.

[0058] On the second aspect, the embodiment of the utility model further provides a winding device for a battery cell 70, including the smoothing mechanism provided above, the principle of which has been described and will not be repeated here.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A smoothing mechanism, characterized in that: The invention comprises a first film-forming roller (10), a smoothing plate (40) and an adjusting assembly (100), wherein the first film-forming roller (10) has a core shaft, the smoothing plate (40) is elastically connected to the core shaft through the adjusting assembly (100), and the smoothing plate (40) can be driven to rotate around the core shaft and reset under the action of the adjusting assembly (100).

2. The smoothing mechanism according to claim 1, characterized in that: The adjustment assembly (100) comprises a fixed shaft (110), an elastic member (120) and a limiting plate (130); one end of the fixed shaft (110) is connected to the core shaft, and the other end is connected to the limiting plate (130); the smoothing plate (40) is connected to the fixed shaft (110) via the elastic member (120); The limiting plate (130) is used to adjust the initial position of the smoothing plate (40).

3. The smoothing mechanism according to claim 2, characterized in that: An extension column (140) is provided on the limiting plate (130) in a direction facing the smoothing plate (40).

4. The smoothing mechanism according to claim 3, characterized in that: The elastic member (120) is a spiral spring, and the spiral spring is sleeved on the outside of the fixed shaft (110).

5. The smoothing mechanism according to claim 4, characterized in that: It also includes a shell, the spiral spring and the fixed shaft (110) are arranged in the shell, and one end of the fixed shaft (110) connected to the limit plate (130) extends out of the shell; one end of the spiral spring is clamped to the fixed shaft (110), and the other end of the spiral spring is clamped to the shell.

6. The smoothing mechanism according to claim 5, characterized in that: A connecting block (41) is provided at one end of the caressing plate (40) facing the shell, and the caressing plate (40) is detachably connected to the shell via the connecting block (41).

7. The smoothing mechanism according to claim 6, characterized in that: The connecting block (41) is arranged at the end of the smoothing plate (40) facing the limiting plate (130), and the extension column (140) abuts against the connecting block (41).

8. The smoothing mechanism according to claim 1, characterized in that: The first film-forming roller (10) is arranged on one side of the winding needle (30) and is arranged close to the material line of the winding needle (30), and the smoothing plate (40) can be driven to move in a direction perpendicular to the material line, approaching or moving away from the winding needle (30).

9. The smoothing mechanism according to claim 8, characterized in that: The first film-forming roller (10) also includes a roller wheel, which is rotatably mounted on a core shaft via a bearing, and the roller wheel rotates along with the transmission of the material line.

10. A battery cell winding device, characterized in that: It comprises the smoothing mechanism according to any one of claims 1 to 9; and further comprises a second film-forming roller (20), wherein the second film-forming roller (20) is driven to approach or move away from the first film-forming roller (10); When the second film-forming roller (20) approaches the first film-forming roller (10), it pushes the caressing plate (40) to rotate around the core axis; When the second film-forming roller (20) moves away from the first film-forming roller (10), the smoothing plate (40) rotates in the opposite direction under the action of the adjusting component (100).

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