Film coating mechanism and film coating device

Abstract

The utility model relates to the technical field of battery production equipment, in particular to a film coating mechanism and a film coating device. The film wrapping mechanism comprises a rolling assembly, the rolling assembly comprises a first roller and a second roller, the first roller is used for rolling and pasting the wrapping film extending out of the front surface of the battery cell on a side seal of the battery cell, and the second roller is used for rolling and pasting the wrapping film extending out of the side seal on the back surface of the battery cell; the length of the second roller can cover the wrapping film, the length of the first roller is smaller than that of the second roller, and the length of the first roller is matched with that of the plane area of the side seal, so that when the first roller rolls and pastes the wrapping on the side seal, the first roller rolls from the plane area of the side seal. Therefore, the short first roller is used for pasting the wrapping film on the side seal of the battery cell, so that the first roller only covers the plane area in the middle of the side seal, and the uneven areas at the two ends of the side seal are completely wrapped, the wrapping film can be effectively prevented from being gathered and wrinkled at the notch, and the appearance of the battery cell pasted with the wrapping film is ensured to meet the requirement.

Description

Technical Field

[0001] This application relates to the field of battery production equipment technology, and in particular to a coating mechanism and coating device. Background Technology

[0002] During the production of pouch batteries, a wrapping film or easy-tear sticker needs to be applied to the surface of the cells to facilitate disassembly and repair of the finished batteries after they are installed in the battery compartment. During the film application process, the wrapping film is first pasted onto the larger side (front) of the cell in the thickness direction. Then, the portion of the wrapping film extending beyond the front side needs to be rolled from the side seal of the cell onto the larger side (back) of the cell.

[0003] Current coating equipment typically uses a single roller to roll the coating film from the side seal of the battery cell to the back of the battery cell. However, due to processing limitations, the side seal of the battery cell cannot be made entirely flat. Its central area is flat, while the two ends along its length are curved surfaces. In addition, in order to avoid the FPC circuitry of the battery cell, the coating film also has notches. This causes the coating film to wrinkle and accumulate at the notches during the process of rolling the coating film from the side seal of the battery cell to the back of the battery cell using a single roller, resulting in a poor appearance of the product after coating. Utility Model Content

[0004] The purpose of this invention is to provide a coating mechanism and coating device to prevent the coating film from accumulating and wrinkling at the gap when the coating film is applied to the side of the battery cell.

[0005] This utility model provides a coating mechanism, including a rolling assembly, wherein the rolling assembly includes a first roller and a second roller;

[0006] The first roller is used to roll the wrapping film extending from the front of the battery cell onto the side seal of the battery cell, and the second roller is used to roll the wrapping film extending from the side seal onto the back of the battery cell.

[0007] The length of the second roller is sufficient to cover the wrapping film, the length of the first roller is less than the length of the second roller, and the length of the first roller is adapted to the length of the planar area of ​​the side seal, so that the first roller can roll over the planar area of ​​the side seal.

[0008] Furthermore, the rolling assembly includes a fixed base, on which both the first roller and the second roller are rotatably mounted;

[0009] The first roller and the second roller are arranged side by side at intervals along the second direction, and the axial directions of the first roller and the second roller are both arranged along the first direction; the side of the first roller away from the second roller in the second direction is used to face the side seal of the battery cell, and the first roller can roll over the side seal in the third direction;

[0010] The first direction, the second direction, and the third direction are mutually perpendicular to each other, the third direction is the thickness direction of the battery cell, and the second direction is perpendicular to the plane where the side seal is located;

[0011] The first roller and the second roller are offset along the third direction, such that when the second roller abuts against the back of the battery cell, the first roller is spaced a predetermined distance from the back of the battery cell.

[0012] Furthermore, the rolling assembly includes a first support and a first elastic element;

[0013] The fixed base is movably mounted on the first bracket along the third direction, one end of the first elastic member abuts against the fixed base, and the other end of the first elastic member abuts against the first bracket;

[0014] When the second roller rolls on the back of the battery cell, the first elastic element provides an elastic force to the fixing seat in the third direction, causing the second roller to elastically abut against the back.

[0015] Furthermore, the rolling assembly also includes a second bracket and a first drive member;

[0016] The first bracket is movably mounted on the second bracket along the second direction, and the first driving member is mounted on the second bracket. The driving end of the first driving member is connected to the first bracket to drive the first bracket to move along the second direction.

[0017] Furthermore, the driving end of the first driving member is provided with a connecting shaft, and the connecting shaft is provided with a first limiting part and a second limiting part spaced apart along the second direction;

[0018] The first bracket is provided with a snap-fit ​​part, which is snapped between the first limiting part and the second limiting part, so that the first bracket can move relative to the connecting shaft between the first limiting part and the second limiting part;

[0019] The rolling assembly further includes a second elastic element, one end of which abuts against the first bracket, and the other end of which abuts against the second bracket. The second elastic element can provide elastic force to the first bracket along the second direction, so that the first roller elastically abuts against the side seal when rolling it.

[0020] Furthermore, the rolling assembly is provided in two sets, and the two sets of rolling assemblies are arranged at a distance from each other along the second direction, and the battery cell can pass through the two rolling assemblies.

[0021] Furthermore, the coating mechanism also includes a platform and a second driving member. The platform is used to support the back of the battery cell, and the driving end of the second driving member is connected to the platform to drive the platform to move up and down in the third direction.

[0022] Furthermore, the coating mechanism also includes a suction plate and a third driving component;

[0023] The suction plate and the platform are arranged opposite each other along the third direction, and the suction plate is used to adsorb the front side of the battery cell;

[0024] The driving end of the third driving member is connected to the suction plate to drive the suction plate to move along the third direction.

[0025] Furthermore, the coating mechanism also includes a fourth driving member, and the suction plate is mounted on the driving end of the fourth driving member through the third driving member, and the fourth driving member can drive the suction plate to move along the first direction.

[0026] This utility model also provides a coating device, including the coating mechanism described in any of the above claims.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] The coating mechanism provided by this utility model includes a rolling assembly, which includes a first roller and a second roller. For a battery cell with a coating film attached to its front side, the first roller is used to roll the coating film extending from the front of the battery cell onto the side seal of the battery cell. After the first roller completes the coating of the side seal, a portion of the coating film extends beyond the side seal, and the second roller is used to roll the portion of the coating film extending beyond the side seal onto the back of the battery cell. The central area of ​​the side seal is a planar area, and the length of the first roller is adapted to the planar area of ​​the side seal. When applying the coating film to the side seal of the battery cell, the first roller can roll across the planar area of ​​the side seal, and the notch in the coating film is located in this planar area. The length of the second roller is greater than the length of the first roller, and the length of the second roller can cover the coating film; that is, the dimension of the coating film in the length direction of the second roller is smaller than the length dimension of the second roller and falls completely within the coverage area of ​​the second roller.

[0029] Therefore, this application sets two rollers of different lengths. The shorter first roller is used to roll the wrapping film onto the side seal of the battery cell, and the first roller only covers the flat area in the middle of the side seal, leaving the uneven areas at both ends of the side seal unwrapped. Then, the longer second roller is used to roll the wrapping film onto the back of the battery cell. This can effectively prevent the wrapping film from accumulating and wrinkling at the gaps, ensuring that the appearance of the battery cell after wrapping meets the requirements.

[0030] This utility model also provides a coating device, including the aforementioned coating mechanism, and thus the coating device also has the beneficial effects of the coating mechanism. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the coating mechanism provided in an embodiment of the present utility model from a first-view perspective;

[0033] Figure 2 A schematic diagram of the coating mechanism provided in an embodiment of this utility model from a second perspective;

[0034] Figure 3 This is a schematic diagram of the rolling assembly of the coating mechanism provided in an embodiment of the present invention.

[0035] Figure label:

[0036] 1-Rolling assembly, 11-First roller, 12-Second roller, 13-Fixed base, 14-First elastic element, 15-First bracket, 16-Second bracket, 17-First driving element, 18-Second elastic element, 2-Platform, 3-Second driving element, 4-Suction plate, 5-Third driving element, 6-Fourth driving element;

[0037] a - First direction, b - Second direction, c - Third direction. Detailed Implementation

[0038] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0039] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0040] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] The following reference Figures 1 to 3 This application describes a coating mechanism and coating device according to some embodiments.

[0044] This application provides a coating mechanism for rolling a portion of the coating film extending from the front of the battery cell along the side seal of the battery cell to the back of the battery cell.

[0045] like Figure 3 As shown, the coating mechanism includes a rolling assembly 1, which includes a first roller 11 and a second roller 12. For a battery cell with a coating film attached to its front side, the first roller 11 is used to roll the coating film extending from the front of the battery cell onto the side seal of the battery cell. After the first roller 11 completes the application of the coating film to the side seal, a portion of the coating film extends out of the side seal, and then the second roller 12 is used to roll the portion of the coating film extending out of the side seal onto the back of the battery cell.

[0046] The central area of ​​the side seal is a planar area. The length of the first roller 11 is adapted to the planar area of ​​the side seal. When applying the wrapping film to the side seal of the battery cell, the first roller 11 can roll over the planar area of ​​the side seal, and the notch in the wrapping film is located on the planar area. The length of the second roller 12 is greater than the length of the first roller 11, and the length of the second roller 12 can cover the wrapping film. That is, the dimension of the wrapping film in the length direction of the second roller 12 is smaller than the length dimension of the second roller 12 and falls completely within the length coverage area of ​​the second roller 12.

[0047] Therefore, this application sets two rollers of different lengths. First, the shorter first roller 11 is used to roll the wrapping film onto the side seal of the battery cell, and the first roller 11 only covers the flat area in the middle of the side seal, leaving the uneven areas at both ends of the side seal unwrapped. Then, the longer second roller 12 is used to roll the wrapping film onto the back of the battery cell. This can effectively prevent the wrapping film from accumulating and wrinkling at its gaps, ensuring that the appearance of the battery cell after wrapping film is applied meets the requirements.

[0048] In one embodiment of this application, preferably, as shown below, Figure 3 As shown, the rolling assembly 1 includes a fixed base 13. The two ends of the first roller 11 and the two ends of the second roller 12 are respectively mounted on the fixed base 13 through supports, so that both the first roller 11 and the second roller 12 can rotate around their own axes. The axis of the first roller 11 is set along the first direction a, and one side of the first roller 11 in the second direction b is used to face the side seal of the battery cell. The first roller 11 can roll over the side seal along the third direction c to roll the part of the wrapping film extending from the front of the battery cell onto the side seal. The first direction a, the second direction b and the third direction c are perpendicular to each other. The third direction c is the thickness direction of the battery cell and also the width direction of the side seal. The first direction a is parallel to the length direction of the side seal, and the second direction b is perpendicular to the side seal.

[0049] The axis of the second roller 12 is also set along the first direction a. The first roller 11 and the second roller 12 are arranged side by side and spaced apart along the second direction b. The second roller 12 is located on the side of the first roller 11 away from the side seal, so that when the first roller 11 rolls over the side seal, the second roller 12 does not contact the side seal.

[0050] The second roller 12 can move relative to the battery cell along the second direction b and roll on the back of the battery cell along the second direction b to push the portion of the wrapping film extending from the side seal to fold toward the back of the battery cell and roll it onto the back of the battery cell. In this embodiment, the first roller 11 and the second roller 12 are offset in the third direction c, so that when the second roller 12 rolls on the back of the battery cell, the first roller 11 is spaced a predetermined distance from the back of the battery cell to avoid the first roller 11 contacting the back of the battery cell. At the same time, when the second roller 12 rolls the wrapping film onto the back of the battery cell, the first roller 11 can play a pre-guiding role for the wrapping film.

[0051] In this embodiment, preferably, the misalignment distance between the first roller 11 and the second roller 12 in the third direction c is 3mm to 8mm.

[0052] In one embodiment of this application, preferably, as shown below, Figure 3As shown, the rolling assembly includes a first bracket 15 and a first elastic member 14. The fixed seat 13 is movably mounted on the first bracket 15 along a third direction c. The two ends of the first elastic member 14 abut against the fixed seat 13 and the first bracket 15, respectively. When the second roller 12 abuts against the back of the battery cell, the first elastic member 14 can increase the elastic force of the fixed seat 13 along the third direction c, so that the fixed seat 13 has a tendency to move towards the back of the battery cell, thereby making the second roller 12 elastically abut against the back of the battery cell, so that the second roller 12 can roll stably on the back of the battery cell to roll the wrapping film onto the back of the battery cell.

[0053] In one embodiment of this application, preferably, as shown below, Figure 3 As shown, the rolling assembly also includes a second bracket 16 and a first driving member 17. The second bracket 16 is fixedly mounted, and the first driving member 17 is fixed to the second bracket 16. The driving end of the first driving member 17 is connected to the first bracket 15, and the driving end of the first driving member 17 is extendable along the second direction b, so that the rolling assembly 1 on the first bracket 15 can move along the second direction b under the drive of the first driving member 17. Therefore, when rolling the side seal of the battery cell, the first driving member 17 can be used to adjust the relative position between the first roller 11 and the side seal in the second direction b, so that when the first roller 11 and the battery cell move relative to each other in the third direction c, the first roller 11 can roll over the side seal. At the same time, when rolling the wrapping film onto the back of the battery cell, the first driving member 17 can drive the second roller 12 to move along the second direction b.

[0054] In this embodiment, preferably, as follows: Figure 3 As shown, the driving end of the first driving member 17 is provided with a connecting shaft, which is connected to a first limiting part and a second limiting part that are spaced apart along the second direction b. The first bracket 15 is provided with a snap-fit ​​part, which is snapped between the first limiting part and the second limiting part, so that the first bracket 15 can move along the second direction b under the drive of the first driving member 17, and the first bracket 15 can also move relative to the connecting shaft between the first limiting part and the second limiting part along the second direction b.

[0055] Furthermore, the rolling assembly also includes a second elastic member 18, which is disposed along the second direction b. One end of the second elastic member 18 abuts against the first support 15, and the other end of the second elastic member 18 abuts against the second support 16. The second elastic member 18 can provide the first support 15 with an elastic force along the second direction b, so that the second support 16 has a tendency to move in the direction of the battery cell along the second direction b.

[0056] When using the first roller 11 to roll and wrap the side seal of the battery cell, the position between the first roller 11 and the side seal can be adjusted first using the first drive member 17. When the first roller 11 abuts against the side seal, the cooperation between the first bracket 15 and the connecting shaft and the elastic force of the second elastic member 18 make the abutment between the first roller 11 and the side seal elastic, thereby ensuring that the first roller 11 rolls stably over the side seal.

[0057] In one embodiment of this application, preferably, as shown below, Figure 1 and Figure 2 As shown, the wrapping mechanism also includes a lifting assembly and a suction plate 4 assembly.

[0058] The lifting assembly includes a platform 2 and a second driving member 3. The platform 2 is used to support the back of the battery cell. The driving end of the second driving member 3 is connected to the platform 2 to drive the platform 2 and the battery cell on the platform 2 to move along a third direction c.

[0059] The suction plate 4 assembly includes a suction plate 4 and a third driving member 5. The suction plate 4 is used to adsorb the front side of the battery cell. The suction plate 4 and the stage 2 are arranged opposite each other along the third direction c. The suction plate 4 is connected to the driving end of the third driving member 5, so that the suction plate 4 can move along the third direction c under the drive of the third driving member 5.

[0060] When applying the wrapping film to the side seal of the battery cell, the battery cell with the wrapping film on its front is first placed on the platform 2, with the back of the battery cell facing the platform 2. Then, the suction plate 4 moves towards the platform 2 until it abuts against the front of the battery cell, and the suction plate 4 is used to adhere to the front of the battery cell. Then, the platform 2 and the suction plate 4 simultaneously move the battery cell along a third direction c, causing the battery cell and the first roller 11 to move relative to each other along the third direction c, and the first roller 11 rolls over the side seal of the battery cell to complete the rolling application of the wrapping film to the side seal of the battery cell. By using the platform 2 and the suction plate 4 to hold the battery cell and move it, misalignment of the battery cell and the wrapping film during the application of the wrapping film can be avoided.

[0061] After the side sealing film is applied, the stage 2 is moved away from the battery cell along the third direction c, and the battery cell is only attracted by the suction plate 4, so as to provide operating space for the second roller 12 to roll the wrapping film onto the back of the battery cell.

[0062] In this embodiment, preferably, as follows: Figure 1 and Figure 2As shown, the suction plate 4 assembly also includes a fourth driving member 6. The suction plate 4 is mounted on the driving end of the fourth driving member 6 via the third driving member 5. The fourth driving member 6 can drive the suction plate 4 to move along the first direction a, thereby adjusting the position of the suction plate 4 along the first direction a so that the suction plate 4 can be accurately adsorbed onto the battery cell. At the same time, the suction plate 4 can also be used to drive the battery cell to adjust its position along the first direction a, so as to ensure that when the first roller 11 rolls over the side seal, the first roller 11 rolls over the planar area of ​​the side seal.

[0063] In one embodiment of the application, preferably, as shown below, Figure 1 and Figure 2 As shown, the rolling assembly 1 is provided in two sets. The two sets of rolling assemblies 1 are arranged at intervals relative to each other along the second direction b. The suction cup assembly and the lifting assembly are located between the two sets of rolling assemblies 1. The suction cup assembly and the lifting assembly can drive the battery cell through the two sets of rolling assemblies 1 so that the two sets of rolling assemblies 1 can simultaneously apply the side sealing film to both sides of the battery cell.

[0064] This application also provides a coating device, including the coating mechanism of any of the above embodiments.

[0065] In this embodiment, the coating device includes a coating mechanism, and therefore the coating device has all the beneficial effects of the coating mechanism, which will not be described in detail here.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An encapsulation mechanism, characterized by, The rolling assembly comprises a first roller and a second roller; The first roller is used for rolling the wrapping film protruding from the front of the battery cell on the side seal of the battery cell, and the second roller is used for rolling the wrapping film protruding from the side seal on the back of the battery cell; The length of the second roller can cover the wrapping film, the length of the first roller is smaller than the length of the second roller, and the length of the first roller is matched with the length of the planar area of the side seal, so that the first roller can roll through the planar area of the side seal.

2. The enveloping mechanism of claim 1, wherein, The rolling assembly comprises a fixing seat, and the first roller and the second roller are rotatably installed on the fixing seat; The first roller and the second roller are arranged side by side in a second direction, and the axes of the first roller and the second roller are arranged in a first direction; the side of the first roller away from the second roller in the second direction is used for facing the side seal of the battery cell, and the first roller can roll through the side seal in a third direction; The first direction, the second direction and the third direction are perpendicular to each other, the third direction is the thickness direction of the battery cell, and the second direction is perpendicular to the plane where the side seal is located; The first roller and the second roller are arranged in a staggered manner in the third direction, so that when the second roller abuts against the back of the battery cell, the first roller is spaced apart from the back of the battery cell by a predetermined distance.

3. The enveloping mechanism of claim 2, wherein, The rolling assembly comprises a first support and a first elastic member; The fixing seat is movably installed on the first support in the third direction, one end of the first elastic member abuts against the fixing seat, and the other end of the first elastic member abuts against the first support; When the second roller rolls on the back of the battery cell, the first elastic member can provide an elastic force in the third direction for the fixing seat, so that the second roller elastically abuts against the back of the battery cell.

4. The enveloping mechanism of claim 3, wherein, The rolling assembly further comprises a second support and a first driving member; The first support is movably installed on the second support in the second direction, and the first driving member is installed on the second support; a driving end of the first driving member is connected with the first support to drive the first support to move in the second direction.

5. The enveloping mechanism of claim 4, wherein, The driving end of the first driving member is provided with a connecting shaft, and a first limiting portion and a second limiting portion are arranged on the connecting shaft in the second direction; A clamping portion is arranged on the first support, and the clamping portion is clamped between the first limiting portion and the second limiting portion, so that the first support can move relative to the connecting shaft between the first limiting portion and the second limiting portion; The rolling assembly further comprises a second elastic member, one end of the second elastic member abuts against the first support, and the other end of the second elastic member abuts against the second support; the second elastic member can provide an elastic force in the second direction for the first support, so that the first roller elastically abuts against the side seal when rolling the side seal.

6. The enveloping mechanism of claim 2, wherein, The rolling assembly is provided with two groups, and the two groups of rolling assemblies are oppositely arranged along a second direction, and the battery cell can pass between the two rolling assemblies.

7. The enveloping mechanism of claim 2, wherein, The film coating mechanism further comprises a carrier and a second driving member, the carrier is used for supporting the back surface of the battery cell, and the driving end of the second driving member is connected with the carrier to drive the carrier to ascend and descend along the third direction.

8. The enveloping mechanism of claim 7, wherein, The film coating mechanism further comprises a suction plate and a third driving member; The suction plate is oppositely arranged with the carrier along the third direction, and the suction plate is used for adsorbing the front surface of the battery cell; The driving end of the third driving member is connected with the suction plate to drive the suction plate to move along the third direction.

9. The enveloping mechanism of claim 8, wherein, The film coating mechanism further comprises a fourth driving member, the suction plate is installed on the driving end of the fourth driving member through the third driving member, and the fourth driving member can drive the suction plate to move along the first direction.

10. An encapsulation device, characterized by The film coating mechanism comprises any one of claims 1 to 9.

Images