CN112736274B

CN112736274B - Coating device and coating equipment

Info

Publication number: CN112736274B
Application number: CN202110008392.6A
Authority: CN
Inventors: 占义包; 彭煜辉; 刘万华; 陈木贵
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2023-05-05
Anticipated expiration: 2041-01-05
Also published as: CN112736274A

Abstract

The application discloses diolame device and diolame equipment for turn over the top cap orientation to the insulating film on the battery cell side, the battery cell includes casing, top cap and utmost point post, and top cap encapsulation casing, the top cap is worn to establish by the utmost point post, and the diolame device is used for turning over the insulating film on the casing and compresses tightly to the top cap, and the diolame device includes: a bracket; the sliding mechanism can slide up and down relative to the bracket; the edge folding mechanism comprises a first driving piece and a first edge folding piece, wherein the first driving piece is in rotary connection with the sliding mechanism, and the first edge folding piece is in rotary connection with the first driving piece; when the sliding mechanism drives the flanging mechanism to move and the first driving piece drives the first flanging piece to be in the first state, the first flanging piece folds and attaches the insulating film on the shell to the top cover towards the pole direction, and when the first driving piece drives the first flanging piece to be in the second state, the first flanging piece compresses the insulating film. The coating device can enable the insulating film to be tightly attached to the top cover, and the warping is avoided.

Description

Coating device and coating equipment

Technical Field

The application relates to the technical field of battery coating machinery, in particular to a coating device and coating equipment.

Background

The lithium battery has the advantages of sustainable recycling and low pollution, has been rapidly developed in recent years, and is widely applied to the fields of electric automobiles, energy storage and the like.

The lithium battery comprises a bare cell, an aluminum shell and a top cover, wherein the aluminum shell is packaged outside the bare cell, and the top cover is used for sealing the aluminum shell, so that the single battery is formed. The single battery is generally required to be coated with an insulating film, and the insulating film is coated on the aluminum shell and part of the top cover, so that the single battery can maintain good insulating property and is convenient to use.

In the existing coating mode, when the insulating film is subjected to edge folding coating from the shell to the top cover, the coating is completed directly through an edge folding turning mode, but the distance between the pole and the shell is narrow, so that the edge folding coating mode enables the insulating film to be attached to the top cover untight, and further the insulating film can be tilted in subsequent use, and the use of the battery cell is affected.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a coating device, which can enable an insulating film on a shell to be tightly attached after being turned over towards the direction of a top cover, so that the warping and the bubbles are avoided.

The application also provides coating equipment with the coating device.

According to the diolame device of this application embodiment of a first aspect for turn over the insulating film on the battery cell side towards the top cap direction, the battery cell includes casing, top cap and utmost point post, the top cap encapsulation the casing, utmost point post wears to establish the top cap, diolame device is used for to the insulating film on the casing turns over and compresses tightly extremely the top cap, diolame device includes: a bracket; the sliding mechanism can slide up and down relative to the bracket; the edge folding mechanism comprises a first driving piece and a first edge folding piece, wherein the first driving piece is in rotary connection with the sliding mechanism, and the first edge folding piece is in rotary connection with the first driving piece; the sliding mechanism drives the edge folding mechanism to move, and when the first driving piece drives the first edge folding piece to be in a first state, the first edge folding piece folds and attaches the insulating film on the shell to the top cover in the pole direction, and when the first driving piece drives the first edge folding piece to be in a second state, the first edge folding piece compresses tightly the insulating film.

According to the coating device disclosed by the embodiment of the application, the coating device has at least the following beneficial effects: through under slide mechanism drives the motion of hem mechanism, first driving piece drive first hem spare is in first state simultaneously, and first hem spare in the hem mechanism can turn over the insulating film on the casing towards the top cap direction, and when first driving piece drive first hem spare was changed to the second state this moment, first hem spare can compress tightly the insulating film to make the insulating film on the casing side turn over towards the top cap direction and compress tightly, turn over earlier and compress tightly afterwards, thereby make the insulating film can be compressed tightly on the top cap, avoid the perk.

According to some embodiments of the present application, the contact surface of the first flanging member and the pole and the contact surface of the first flanging member and the top cover are inclined surfaces.

According to some embodiments of the present application, the contact surface between the first flanging member and the pole and the contact surface between the first flanging member and the top cover are connected through an arc surface.

According to some embodiments of the application, a first heat conducting wire is arranged in the first flanging piece and is used for heating the first flanging piece.

According to some embodiments of the application, the material of the first hemming member is silica gel or rubber.

According to the coating equipment of the second aspect embodiment of the application, the coating equipment comprises the coating device, wherein the coating device comprises two sliding mechanisms and two flanging mechanisms, one sliding mechanism correspondingly drives one flanging mechanism to move, and the two flanging mechanisms are oppositely arranged and used for folding insulating films on the upper side and the lower side of the shell towards the direction of the pole and compressing the insulating films to the top cover.

According to the coating equipment disclosed by the embodiment of the application, the coating equipment has at least the following beneficial effects: the automatic film coating machine comprises two sliding mechanisms and two edge folding mechanisms, so that the insulating films on two large surfaces of a single battery can be turned and pressed at one time, two side edge folding mechanisms are further arranged on a support, the insulating films on two small surfaces of a shell can be directly turned and pressed on a top cover, the film coating of the single battery is automatic, the film coating can be completed in two steps, and the film coating efficiency is high.

According to some embodiments of the application, the coating device further comprises two side flanging mechanisms, wherein the two side flanging mechanisms are arranged on the front side and the rear side of the bracket, and are used for turning over the insulating films on the front side and the rear side of the shell towards the pole direction and compressing the insulating films to the top cover.

According to some embodiments of the application, the side flanging mechanism comprises a second driving piece and a second flanging piece, the second driving piece drives the second flanging piece to move so as to fold and compress the insulating film to the top cover, and a contact surface of the second flanging piece and the top cover is an inclined surface.

According to some embodiments of the application, a second heat conducting wire is installed in the second flanging piece, and the second heat conducting wire is used for heating the second flanging piece.

According to some embodiments of the present application, the coating apparatus further includes a battery holder for carrying the unit battery, the support includes a base and a sliding seat, each of the sliding mechanisms and each of the hemming mechanisms are disposed on the sliding seat, and the sliding seat slides relative to the base under the drive of the fourth driving member so as to be close to or far away from the battery holder.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The application is further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic view of an uncoated structure of a single battery according to an embodiment of the disclosure; the method comprises the steps of carrying out a first treatment on the surface of the

Fig. 2 is a schematic structural diagram of the battery cell of fig. 1 after being coated;

FIG. 3 is a schematic structural view of an encapsulation device according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of the first flanging member of FIG. 3 in a first state and a single battery;

FIG. 5 is an enlarged schematic view of the portion I in FIG. 4;

FIG. 6 is a schematic view of the first flanging member of FIG. 3 in a second state and a single battery;

FIG. 7 is an enlarged schematic view of the portion II of FIG. 6;

fig. 8 is a schematic structural view of an encapsulation tool according to another embodiment of the present application.

Reference numerals:

a coating device 100;

a bracket 110, a base 111, a slide base 112, and a fourth driving member 113;

the sliding mechanism 120, the third driving piece 121, the first sliding block 122, the first sliding chute 123 and the fixing piece 124;

the flanging mechanism 130, the first driving piece 131, the first flanging piece 132, the connecting piece 133, the first face 1321, the second face 1322 and the first heat conducting wire 1323;

single cell 200, housing 210, top cover 220, pole 230, large face 240, small face 250;

an insulating film 300;

a coating apparatus 400;

the side hemming mechanism 410, the second driving member 411, the second hemming member 412, the second slider 413, the second chute 414, the mounting member 415, the second heat conductive wire 4121;

battery holder 420, bottom plate 421, pallet 422, and retaining plate 423.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that references to orientation descriptions, such as directions of up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical solution.

In the description of the present application, a description with reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 to 7, an encapsulation device 100 according to an embodiment of the present application includes a bracket 110, a sliding mechanism 120, and a flanging mechanism 130.

The coating device 100 in this embodiment is used for turning over an insulating film on a side surface of the unit cell 200 toward a top cover direction, the unit cell 200 includes a housing 210, a top cover 220 and a pole 230, the top cover 220 encapsulates the housing 210, the pole 230 penetrates through the top cover 220, and the coating device 100 is used for turning over and pressing the insulating film 300 on the housing 210 to the top cover 220.

Fig. 1 is a schematic diagram of a single battery 200 without coating, and fig. 2 is a schematic diagram of a single battery 200 after coating, wherein the single battery 200 includes two opposite large faces 240 and two opposite small faces 250, the coating device 100 in this embodiment is used for folding an insulating film 300 located on the large faces 240 of the single battery 200 toward a pole 230 and pressing the insulating film onto a top cover 220, and because the distance between the pole 230 and the large faces 240 is relatively narrow, the insulating film 300 is not tightly coated after coating is completed by the existing coating equipment, so that a warping phenomenon occurs.

In one embodiment of the present application, the bracket 110 is used for supporting the sliding mechanism 120 and the hemming mechanism 130, and the sliding mechanism 120 can slide up and down relative to the bracket 110 and drive the hemming mechanism 130 to slide up and down; the flanging mechanism 130 comprises a first driving piece 131 and a first flanging piece 132, wherein the length of the first flanging piece 132 is longer than that of the single battery 200, the first driving piece 131 is rotationally connected with the sliding mechanism 120, and the first flanging piece 132 is rotationally connected with the first driving piece 131; when the sliding mechanism 120 drives the folding mechanism 130 to move and the first driving member 131 drives the first folding member 132 to be in the first state, the first folding member 132 folds the insulating film 300 on the housing 210 towards the pole 230 to be attached to the top cover 220, specifically please refer to fig. 4 and fig. 5, and when the first driving member 131 drives the first folding member 132 to be in the second state, the first folding member 132 compresses the insulating film 300, please refer to fig. 6 and fig. 7, wherein the insulating film 300 in the embodiment is the insulating film 300 located on the large surface 240.

According to the coating device 100, the first driving member 131 drives the first flanging member 132 to be in the first state under the movement of the flanging mechanism 130 driven by the sliding mechanism 120, the first flanging member 132 in the flanging mechanism 130 can fold the insulating film 300 on the shell 210 towards the top cover 220, and at the moment, when the first driving member 131 drives the first flanging member 132 to change into the second state, the first flanging member 132 can compress the insulating film 300, so that the insulating film 300 on one large surface 240 of the shell 210 is folded and compressed towards the top cover 220, and the insulating film 300 can be compressed on the top cover 220 after being folded, thereby avoiding warping.

Referring to fig. 3, in an embodiment of the present application, the sliding mechanism 120 includes a third driving member 121, a first sliding block 122, a first sliding groove 123 and a fixing member 124, wherein the third driving member 121 is fixedly connected with the fixing member 124, the first sliding block 122 is disposed on the bracket 110, the first sliding groove 123 is disposed on one side of the fixing member 124, and the first sliding groove 123 is slidably connected with the first sliding block 122, so as to enable the third driving member 121 to drive the fixing member 124 to slide up and down with respect to the first sliding block 122.

The third driving member 121 in this embodiment is a driving cylinder.

In this example, two parallel first sliding blocks 122 and two parallel first sliding grooves 123 are disposed at intervals, and one first sliding groove 123 is slidably connected with one first sliding block 122, so that the third driving member 121 drives the two first sliding grooves 123 on the fixing member 124 to slide stably up and down with respect to the two first sliding blocks 122.

In one embodiment of the present application, the hemming mechanism 130 includes a first driving member 131, a first hemming member 132, and two connecting members 133, where the first driving member 131 is rotatably connected to the sliding mechanism 120, and the first hemming member 132 is rotatably connected to the first driving member 131.

The first driving member 131 in this embodiment is a driving cylinder.

Specifically, one end of the first driving member 131 is rotatably connected to the fixing member 124, the other end of the first driving member 131 is rotatably connected to the first folding member 132, and two ends of the first folding member 132 are rotatably connected to one end of each connecting member 133, and the other end of the connecting member 133 is fixedly connected to the fixing member 124. Therefore, under the driving of the first driving member 131, the first hemming member 132 can rotate relative to the connecting member 133, and since the connecting member 133 is fixedly connected relative to the fixing member 124, the first hemming member 132 can rotate relative to the sliding mechanism 120, so that the sliding mechanism 120 and the first driving member 131 can drive the first hemming member 132 to have different action states.

Referring to fig. 4 to 7, the contact surface between the first flanging member 132 and the pole 230 is a first surface 1321, the contact surface between the first flanging member 132 and the top cover 220 is a second surface 1322, and the first surface 1321 and the second surface 1322 are inclined surfaces. Because the pole 230 and the top cover 220 are in a vertical state, the included angle between the pole 230 and the top cover 220 is 90 degrees, the contact surface between the first folding member 132 and the pole 230 and the contact surface between the first folding member 132 and the top cover 220 are inclined planes, and the included angle between the first folding member 132 and the top cover 220 is smaller than 90 degrees, so that after the sliding mechanism 120 and the first driving member 131 drive the first folding member 132 to fold the insulating film 300 on the shell 210 towards the pole 230, gaps are reserved between the first surface 1321 and the pole 230 and between the second surface 1322 and the top cover 220, and the first driving member 131 can drive the first folding member 132 to push downwards towards the pole 230, so as to compress the insulating film 300, and the first driving member 131 drives the second surface 1322 and the top cover 220 to press and contact again, so that the insulating film 300 is tightly attached to the top cover 220, and the rising phenomenon is avoided.

Referring to fig. 4 to 7, since the connection area between the top cover 220 and the housing 210 is in an arc transition, the contact surfaces between the first flanging member 132 and the pole 230 and the contact surfaces between the first flanging member 132 and the top cover 220 are in an arc transition, that is, the first surface 1321 and the second surface 1322 are connected through the arc surfaces, so as to adapt to the arc transition area between the top cover 220 and the housing 210, thereby avoiding scratching the battery and ensuring the tightness of the rubberizing.

Wherein, in order to make the insulating film 300 design, be equipped with first heat conduction silk 1323 in the first hem spare 132, first heat conduction silk 1323 is used for heating first hem spare 132 to when first hem spare 132 carries out hem press mold, can also heat the design to the insulating film 300, make it can closely attach on top cap 220 surface after the cooling, avoid the perk, guarantee the pad pasting effect.

Wherein, the first heat conducting wire 1323 is pre-installed in the first flanging piece 132, when the flanging is performed, the first heat conducting wire 1323 is heated, the flanging and scalding withstanding pressure is preset between 5kgf and 10kgf, the heating temperature of the first heat conducting wire 1323 is preset between 100 ℃ and 120 ℃, and the heating time lasts between 2 seconds and 5 seconds.

In addition, since the whole housing in the single battery 200 is made of metal, the material of the first flanging member 132 in the embodiment is silica gel or rubber, which has both a certain elasticity and a high temperature resistance. Thus not only being resistant to high temperature when heated, but also protecting the single battery 200 and making the envelope more compact.

The specific use process of the coating device 100 is as follows: when the insulating film 300 on the upper large surface 240 of the casing 210 is turned over, the third driving member 121 drives the flanging mechanism 130 to descend as a whole, the first driving member 131 drives and extends to enable the first flanging member 132 to be in the first state, the first surface 1321 of the first flanging member 132 and the top cover 220 are approximately in the vertical state, please refer to fig. 4 and fig. 5, the arc transition area of the first surface 1321 and the second surface 1322 presses the insulating film 300 on the arc transition area of the top cover 220 and the large surface 240, the insulating film 300 is pressed down to be attached to the top cover 220 under the driving of the first driving member 131, the first driving member 131 extends again, so that the first flanging member 132 is driven to change into the second state, the second surface 1322 of the first flanging member 132 moves towards the top cover 220 and is attached to the top cover 220, please refer to fig. 6 and fig. 7, so that the insulating film 300 is tightly wrapped on the top cover 220 through a plurality of steps, and when the large surface 240 is turned over, the other battery is coated, and the other large surface 240 is clamped.

According to the coating device 100, the contact surface between the first flanging piece 132 and the pole 230 is set to be an inclined surface, and the contact surface between the first flanging piece 132 and the top cover 220 is designed to be an inclined surface, so that under the mutual cooperation of the third driving piece 121 and the first driving piece 131, the first flanging piece 132 can be driven to tightly press the insulating film 300 on the top cover 220, and the first heat conducting wire 1323 is further arranged in the first flanging piece 132, so that the insulating film 300 can be heated and shaped, the flatness of the adhesive film can be ensured after cooling, and the rising of the insulating film in the subsequent use process is avoided.

Referring to fig. 8, in another embodiment of the application, the coating apparatus 400 includes two sliding mechanisms 120 and two folding mechanisms 130, where one sliding mechanism 120 correspondingly drives one folding mechanism 130 to move, and the two folding mechanisms 130 are oppositely disposed and are used for folding and compressing the insulating films 300 of the two large faces 240 on the upper and lower sides of the housing 210 toward the pole 230 toward the top cover 220, so that the coating of the two large faces 240 of the housing 210 is completed at one time, and the coating efficiency is high.

In one embodiment of the present application, the coating apparatus 400 further includes two side flanging mechanisms 410, where the two side flanging mechanisms 410 are disposed on front and rear sides of the bracket 110, and are used to fold and compress the insulating film 300 of the two facets 250 on the front and rear sides of the housing 210 toward the pole 230 to the top cover 220.

The side flanging mechanism 410 includes a second driving member 411 and a second flanging member 412, the second driving member 411 is fixedly connected with the bracket 110, and the two second flanging members 412 are driven by the respective second driving members 411 to fold the insulating film 300 of the two facets 250 on the front side and the rear side of the housing 210 toward the pole 230 and compress the insulating film to the top cover 220. Wherein the contact surface between the second flanging member 412 and the top cover 220 is a bevel. The width of the second flanging member 412 is greater than that of the unit cell 200.

The second driving member 411 in this embodiment is a driving cylinder.

Specifically, the side flanging mechanism 410 includes a second driving member 411, a second flanging member 412, a second slider 413, a second chute 414, and a mounting member 415, where the second driving member 411 is disposed on the bracket 110 and is fixedly connected with the bracket 110, the second slider 413 is disposed on the bracket 110, the second slider 413 is perpendicular to the first slider 122, the second chute 414 is disposed on one side of the mounting member 415, the second chute 414 is slidably connected with the second slider 413, and the second flanging member 412 is fixedly connected with the mounting member 415, so that the mounting member 415 is driven by the second driving member 411 to slide with respect to the bracket 110, and thus the second flanging member 412 disposed on the mounting member 415 is driven to slide with respect to the bracket 110.

In addition, in order to shape the insulating film 300, the second heat conducting wire 4121 is disposed in the second flanging member 412, and the second heat conducting wire 4121 is used for heating the second flanging member 412, so that when the second flanging member 412 performs flanging and film pressing, the insulating film 300 can be further shaped by heating, so that the insulating film 300 can be tightly attached to the surface of the top cover 220 after being cooled, tilting is avoided, and film pasting effect is ensured.

Wherein, the second heat conducting wire 4121 is pre-installed in the second flanging piece 412, when the flanging is performed, the second heat conducting wire 4121 is heated, the flanging and scalding withstanding pressure is preset between 5kgf and 10kgf, the heating temperature of the second heat conducting wire 4121 is preset between 100 ℃ and 120 ℃, and the heating time lasts between 2 seconds and 5 seconds.

In addition, since the whole housing of the single battery 200 is made of metal, the second flanging member 412 in the embodiment is made of silica gel or rubber, and has certain elasticity and high temperature resistance. Thus not only being resistant to high temperature when heated, but also protecting the single battery 200 and making the envelope more compact.

Referring to fig. 8, the coating apparatus 400 further includes a battery holder 420 for carrying the single battery 200, the bracket 110 includes a base 111 and a sliding seat 112, the sliding mechanism 120, the two edge folding mechanisms 130, and the two side edge folding mechanisms 410 are disposed on the sliding seat 112, and the sliding seat 112 slides relative to the base 111 under the driving of the fourth driving member 113 to approach and separate from the battery holder 420. Therefore, under the driving of the fourth driving member 113, an avoidance space can be reserved between the sliding seat 112 and the battery fixing frame 420, so that the manipulator can conveniently grasp and put the single battery 200.

The fourth driving member 113 is a driving cylinder.

In one embodiment of the present application, the battery holder 420 includes a bottom plate 421, a supporting plate 422, and a blocking plate 423, the bottom plate 421 is used for mounting the supporting plate 422, the unit battery 200 is placed on the supporting plate 422, and the blocking plate 423 is used for blocking the unit battery 200. Wherein the height of the blade 422 matches the height of the side hemming mechanism 410.

The above-mentioned diolame equipment 400 includes two slide mechanism 120 and two hem mechanisms 130 to can realize the disposable turn-ups to two big faces 240 of battery cell 200 and diolame, still be equipped with two side hem mechanisms 410 on support 110, can directly turn over the insulating film 300 on two facet 250 of casing 210 and compress tightly to top cap 220, thereby make the diolame of battery cell 200 realize automaticly, two steps can accomplish, diolame efficiency is high.

The embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the present application and features of the embodiments may be combined with each other without conflict.

Claims

1. The coating device is used for turning over the insulating film on the battery cell side towards the top cap direction, the battery cell includes casing, top cap and utmost point post, the top cap encapsulation the casing, utmost point post wears to establish the top cap, the coating device is used for turning over and compressing tightly to the insulating film on the casing the top cap, its characterized in that, the coating device includes:

a bracket;

the sliding mechanism can slide up and down relative to the bracket;

the edge folding mechanism comprises a first driving piece and a first edge folding piece, wherein the first driving piece is in rotary connection with the sliding mechanism, and the first edge folding piece is in rotary connection with the first driving piece;

when the sliding mechanism drives the flanging mechanism to move and the first driving piece drives the first flanging piece to be in a first state, the first surface of the first flanging piece and the top cover are approximately in a vertical state, the first flanging piece folds and attaches the insulating film on the shell to the top cover towards the pole direction, the first driving piece drives the first flanging piece to push downwards towards the pole direction, and when the first driving piece drives the first flanging piece to be in a second state, the second surface of the first flanging piece is tightly attached to the top cover, the first driving piece drives the second surface to be in pressing contact with the top cover, and the second surface tightly presses the insulating film and tightly attaches the insulating film to the top cover;

the contact surface of the first flanging part and the pole is a first surface, the contact surface of the first flanging part and the top cover is a second surface, the first surface and the second surface are inclined surfaces, and the included angle between the first surface and the second surface is smaller than 90 degrees.

2. The coating apparatus of claim 1, wherein the contact surface of the first flanging member and the pole and the contact surface of the first flanging member and the top cover are connected by an arc surface.

3. The coating apparatus of claim 1, wherein a first thermally conductive filament is disposed within the first hemming member, the first thermally conductive filament being configured to heat the first hemming member.

4. The coating apparatus of claim 1, wherein the material of the first hemming member is silicone or rubber.

5. The coating device is characterized by comprising the coating device according to any one of claims 1 to 4, wherein the coating device comprises two sliding mechanisms and two flanging mechanisms, one sliding mechanism correspondingly drives one flanging mechanism to move, and the two flanging mechanisms are oppositely arranged and are used for folding and pressing insulating films on the upper side and the lower side of the shell towards the direction of the polar column to the top cover.

6. The coating apparatus according to claim 5, further comprising two side hemming mechanisms provided on front and rear sides of the bracket for folding the insulating films on the front and rear sides of the housing toward the pole and pressing the insulating films to the top cover.

7. The encapsulation tool of claim 6, wherein the side hemming mechanism includes a second drive member and a second hemming member, the second drive member driving the second hemming member to move to fold and compress the insulating film to the top cover, the contact surface of the second hemming member and the top cover being a bevel.

8. The coating apparatus of claim 7, wherein a second heat conducting wire is mounted within the second hemming member, the second heat conducting wire being configured to heat the second hemming member.

9. The coating apparatus of claim 5, further comprising a battery holder for carrying the unit battery, wherein the support comprises a base and a slide mount, each of the slide mechanisms and each of the hemming mechanisms being disposed on the slide mount, the slide mount being slid relative to the base to approach or separate from the battery holder under the drive of a fourth drive member.