CN111816906A

CN111816906A - Film coating machine

Info

Publication number: CN111816906A
Application number: CN202010825550.2A
Authority: CN
Inventors: 张万财; 冯俊敏; 吴婷婷
Original assignee: Xiamen Haichen New Energy Technology Co Ltd
Current assignee: Xiamen Haichen New Energy Technology Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-10-23
Anticipated expiration: 2040-08-17
Also published as: CN111816906B

Abstract

A film coating machine belongs to the field of battery packaging. The film coating machine comprises a large-surface film coating device, a two-character shearing device and a folding device which are sequentially arranged according to the working procedure positions. The large-face coating device is used for coating the large face of the battery, the two-character shearing device is used for shearing the blue film corresponding to the bottom of the battery to form a two-character notch, and then the sheared blue film is folded through the folding device. The film coating machine can be compatible with two processes of U-shaped film coating and reverse-shaped film coating with smaller modification cost, so that lower equipment purchase cost and higher film coating flexibility in the battery film coating process are realized.

Description

Film coating machine

Technical Field

The application relates to the field of battery packaging, in particular to a film coating machine.

Background

The blue coating of the square hard-shell battery refers to: and coating a blue protective film on the outer surface of the battery.

The blue film is generally wrapped around the surface of the battery before shipment. Which can ensure good insulation of the outer surface of the battery and is therefore an indispensable part of the battery production process. The battery can be protected by wrapping the blue film on the battery, the surface of the battery is protected from being scratched and corroded by electrolyte, and the appearance of the battery is more attractive.

At present, the process of coating blue films on batteries is basically completed by automation equipment and manpower, and the equipment is divided into a U-shaped film coating machine and a reverse-shaped film coating machine.

However, the two film coating machines are completely independent, so that the two sets of equipment need to be specifically equipped to meet the requirements based on different film coating modes. If another coating mode is replaced, the coating equipment needs to be replaced, so that the cost and the labor input of a company are increased. Alternatively, an existing film coating machine can be optionally modified so as to be suitable for another film coating mode. However, the existing film coating machine has long modification period and great difficulty.

Disclosure of Invention

In order to improve, solve foretell coating machine transformation degree of difficulty even big, can not conveniently compatible U type and the problem of two kinds of film forms of returning the type, this application has proposed a coating machine.

The application is realized as follows:

in a first aspect, an embodiment of the application provides a film coating machine, which comprises a large-surface film coating device, a two-character shearing device and a folding device which are sequentially arranged according to process positions and are independently configured.

The large-surface film coating device is provided with a power transmission battery mechanism and a film pressing mechanism which are sequentially arranged; wherein, power transmission battery mechanism has tensioning roller, cross-connect's first frame and first delivery track, and the tensioning roller is connected in the frame and is located first delivery track's exit end, and press mold mechanism includes opposite press mold roller, cross-connect's second frame and second delivery track, and the press mold roller is located second delivery track's entry end and connects in the second frame.

The device for cutting the double-character pattern comprises a third rack, a first displacement mechanism, a second displacement mechanism, a clamping plate mechanism and a cutter mechanism, wherein the third rack is connected to one side, deviating from the first rack, of the second rack, the first displacement mechanism is connected to the third rack, the clamping plate mechanism, the cutter mechanism and the second displacement mechanism are connected to the first displacement mechanism, and the cutter mechanism is provided with a blade driven by the second displacement mechanism.

The edge folding device is provided with a top edge folding mechanism and a bottom edge folding mechanism which are arranged oppositely, and the top edge folding mechanism and the bottom edge folding mechanism are distributed on two sides of the tail end of the second conveying track; the top folding mechanism comprises a top folding frame, a first top folding plate and a second top folding plate, wherein the first top folding plate and the second top folding plate are arranged in the longitudinal and transverse directions and connected to the top folding frame; the bottom folding mechanism comprises a bottom folding frame, a first bottom folded plate and a second bottom folded plate, wherein the first bottom folded plate and the second bottom folded plate are arranged in the longitudinal direction and the transverse direction and are connected to the bottom folding frame, the first bottom folded plate is arranged in two opposite positions, and the second bottom folded plate is arranged in two opposite positions.

Optionally, the power feeding mechanism includes a positioning roller connected to the first frame and located at an outlet end of the first conveying rail, and the tension rollers are located at both sides of the positioning roller.

Optionally, the film feeding mechanism includes a film drawing roller, and the film drawing roller is connected to the first rack in a liftable manner and is located at the outlet end of the first conveying rail.

Optionally, the second frame is connected with a film cutting knife, and the film cutting knife is located at the inlet end of the second conveying track and can reciprocate along the width direction of the second conveying track.

Optionally, the lamination roller comprises an upper roller and a lower roller with an adjustable lamination gap therebetween.

Optionally, the two-letter shearing device has two groups, and is respectively located at two sides of the second conveying track.

Optionally, the top and bottom crimping mechanisms are each provided with a pair of platens, and each pair of platens can be relatively far apart or close together.

Optionally, the first top flap and the second top flap are each driven in a linear reciprocating motion by a top displacement mechanism connected to the top hemming frame.

Optionally, the first bottom flap is driven in a linear reciprocating motion by a bottom displacement mechanism connected to the bottom folding frame.

Optionally, the second bottom flap is driven in a rotationally reciprocating motion by a bottom pivoting mechanism connected to the bottom folding frame.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1-A is a schematic flow diagram of a conventional reverse-type coating process;

FIG. 1-B is a schematic flow chart of an existing U-shaped coating process;

fig. 2 shows a schematic structural view of the cooperation of a membrane with a battery after a first operation is performed in an encapsulation method of an example of the present application;

FIG. 3 shows a schematic diagram of the membrane-to-cell fit after a second operation in an encapsulation process according to an example of the present application;

fig. 4 shows a schematic view of a membrane mated with a battery at a first viewing angle after a third operation in an encapsulation process according to an example of the present application;

fig. 5 shows a schematic view of a membrane mated with a battery at a second viewing angle after a third operation in an encapsulation process according to an example of the present application;

fig. 6 shows a schematic view of a membrane mated with a battery at a third viewing angle after a fourth operation in an encapsulation process according to an example of the present application;

fig. 7 shows a schematic view of a membrane mated with a battery at a fourth viewing angle after a fourth operation in an encapsulation process according to an example of the present application;

fig. 8 shows a schematic structural view of a membrane and a battery after a fifth operation in an encapsulation method of an example of the present application;

fig. 9 is a schematic structural diagram of a film coating machine according to an embodiment of the present application;

FIG. 10-A is a schematic structural view of a large-surface film wrapping device in the film wrapping machine of FIG. 9;

FIG. 10-B is a schematic view of a film pressing mechanism in the large bread film forming apparatus of FIG. 10-A at a different viewing angle;

FIG. 10-C is a schematic diagram of the battery feeding mechanism in the large bread making device of FIG. 10-A at a different viewing angle;

FIG. 11 is a schematic structural view of a double-letter shearing device in the film coating machine of FIG. 9;

FIG. 12 is a schematic view of the folding device in the film wrapping machine of FIG. 9;

FIG. 13 is a schematic view of the bottom hemming mechanism of the hemming device of FIG. 12;

fig. 14 is a schematic view of the top hemming mechanism in the hemming device of fig. 12.

Icon: 900-a battery; 800-film material; 801-a first end portion; 802-a second end; 803-third end portion; 804-a fourth end; 100-a film coating machine; 101-large surface coating device; 102-a two-character cutting device; 103-a flanging device; 1011-a battery-feeding mechanism; 1012-film pressing mechanism; 10111-a first gantry; 10112-a first delivery track; 10113-tension roller; 10114-positioning rollers; 10115-film drawing roller; 112 a-bottom wheel; 112 b-side wheels; 10121-squeeze film roller; 10122-a second gantry; 10123-a second delivery track; 10124-film cutter; 1021-a third chassis; 1022 — a first displacement mechanism; 1023-a second displacement mechanism; 1024-a clamping plate mechanism; 1025-cutter mechanism; 1031-bottom edge folding mechanism; 10311-bottom edge folding frame; 10312-a first bottom flap; 10313-a second bottom flap; 1032-top crimping mechanism; 10321-a top hemming bed; 10322-a first top flap; 10323-a second top flap; 104-pressing plate.

Detailed Description

At present, the coating mode of the battery mainly comprises a reverse type coating (figure 1-A) and a U type coating (figure 1-B). However, the two coating methods need to be applied to production lines with completely different structures, namely, the two coating methods operate by completely different coating equipment. Therefore, two kinds of coating equipment are required to be equipped in actual production, so that the coating cost and the equipment purchase cost are high.

In view of the above, in the present application example, the inventor proposes a new film coating machine, and also proposes a film coating method implemented by using the film coating machine — a new circular film coating manner. The equipment can meet the process requirements of the double-sided envelope and the U-shaped envelope.

It should be noted that the above "compatible with existing envelopes and U-shaped envelope process" means: the film coating machine provided by the present application can implement a new type-reversing film coating method, see fig. 2 to 8 (different from the prior art type-reversing film coating method, fig. 1-a).

Meanwhile, the film coating machine can also realize the existing U-shaped film coating mode (the U-shaped film coating mode in the prior art, shown in the figure 1-B) through relatively small modification. The 'minor modification' refers to modification (relating to change of number and position) of the double-line shearing device and the edge folding device of the film coating machine in the example of the application. Compared with the prior art in which the whole coating equipment is directly replaced, the scheme of the application has the advantages of small modification difficulty and short period.

In addition, when the coating machine switches between different coating modes, the input mode of the battery can be properly adjusted by matching the two-character shearing device and the edge folding device.

Fig. 2 to 8 show a new coating method of the clip type in the present application, which first coats the side of the battery. Therefore, the cells were transported with the side facing the blue film at the time of feeding. And then the battery is reformed for coating the bottom surface of the battery when the U-shaped coating is carried out. Therefore, the battery is transported with the bottom surface facing the blue film at the time of feeding.

The battery encapsulation method implemented in the present application is described below with reference to examples. The novel dual-surface coating mode mainly comprises three links, namely a large surface coating mode, a bottom surface coating mode and a top surface coating mode.

It is noted that in the present example, the encapsulated battery 900 is cited as an example of a generally rectangular parallelepiped-shaped structure having a relatively long height (denoted by a in fig. 2), and a relatively small width (denoted by B in fig. 2) and length (denoted by C in fig. 2). However, the processes and apparatuses proposed in the examples of the present application are not limited to the above-described structure of the battery 900. In other examples, the block battery 900 having a hexahedral structure as a whole may be applied to the present application.

In addition, in the battery 900 (rectangular parallelepiped) corresponding to the above-described structure, the large surface thereof means a surface having a relatively large surface area. As in fig. 2, of the six faces of the rectangular parallelepiped battery 900, the large face is the upper large face defined by the direction a and the direction C and the lower large face opposed thereto; the top surface is the top surface as defined above for direction B and direction C; the bottom surface is defined by a direction B and a direction C; what is collectively defined by the large face, the top face, and the bottom face is a left side face (defined by direction a and direction B) and an opposite right side face. For ease of illustration, the six surfaces of the battery 900 are described in the example as opposing top and bottom surfaces, opposing first and second side surfaces, opposing first and second major surfaces, respectively.

Accordingly, the (blue) film to wrap the battery 900 is provided in a sheet/strip form having a first end 801 and a second end 802 extending in a first direction (parallel to the width direction a of the battery 900), and a third end 803 and a fourth end 804 extending in a second direction (parallel to the height direction B of the battery 900). Also, one surface of the blue film has tackiness, so that it can be firmly adhered to the surface of the battery.

Therefore, the step of attaching the large faces mainly includes bending the two ends of the film in the second direction so as to wrap the first side face, the second side face, the first large face and the second large face of the battery 900. Bottoming is primarily intended to refer to folding one end of the film in a first direction to wrap the bottom surface of the cell 900, while topping is primarily intended to refer to folding the other end of the film in the first direction to wrap the top surface of the cell 900.

The following describes the method of the battery film-wrapping material in examples with reference to the drawings (fig. 2 to 8).

Step S101 is to attach the film 800 to the first side surface of the battery 900 such that the first end 801 and the second end 802 are distributed in the direction from the first large surface to the second large surface, and the third end 803 and the fourth end 804 are distributed in the direction from the top surface to the bottom surface.

As shown in fig. 2, the film 800 is attached to the right side (first side surface) of the battery 900, and the first end 801, the second end 802, the third end 803, and the fourth end 804 respectively extend to the outside of the battery 900.

Step S102, folding the film material 800 to cover the first and second large faces, and attaching the first and

second end portions

801 and 802 to the second side face.

As shown in fig. 3, the first end 801 and the second end 802 of the film 800 are folded and covered on the left side (second side) of the battery 900. In the subsequent film coating machine, the process can be completed by moving the battery 900 toward the film 800 until the battery 900 drives the limited (tensioned) film 800 to be bent and deformed in the length direction.

Thus, the first side, the second side, the first large side, and the second large side of the battery 900 are all covered by the film 800. Also, on the second side of the cell 900, the first end 801 and the second end 802 of the film 800 are immediately adjacent to each other (and may even be one overlying the other). The film 800 is folded to form a quadrangular prism-shaped cylindrical structure, and both ends thereof protrude out of the top and bottom surfaces of the battery 900.

Step S103, cutting the fourth end 804 of the film material 800 at a location adjacent to the intersection of the first side surface and the first major surface, the intersection of the first side surface and the second major surface, the intersection of the second side surface and the first major surface, and the intersection of the second side surface and the second major surface to form a first side fold, a first major fold extending along the first major surface, a second side fold extending along the second side surface, and a second major fold extending along the second major surface.

In this step, the bottom surface of the battery 900 is mainly wrapped by folding the film material 800. That is, the film material 800 on the bottom surface side of the cell 900 is cut/sheared to perform the "double-cut" operation. Wherein the cutting position is at a proper distance from each intersection line. On the one hand, the cutting mode is convenient to operate, and meanwhile better coverage of the folded edge can be achieved.

By this operation, the portion of the film 800 on the bottom surface side of the cell 900 is divided into four main portions. And, the four parts can be independently bent. Wherein the first portion extends in the same direction as the first side of the battery 900; the second portion extends in the same direction as the first major face of the cell 900; the third portion extends in the same direction as the second side of the battery 900; the fourth portion extends in the same direction as the second major surface of the cell 900, and is configured as shown in fig. 4 and 5.

Step S104, folding the first and second large folded portions to cover the bottom surface, and then folding the first and second side folded portions to cover the first and second large folded portions.

Through the above-described double-letter cutting operation, portions of the film material 800 on the bottom surface of the battery 900 may be separately and independently folded so as to wrap the bottom surface of the battery 900. In other words, the four portions formed are independently folded by the operation of the above step S103.

As shown in fig. 6 and 7, first folding the first large folded portion and the second large folded portion extending in the same direction as the first large face and the second large face, respectively, to cover the bottom face; the ends of the first and second large folds are in close proximity to completely cover the bottom surface of the cell 900.

Then, the first side folded part and the second side folded part extending in the same direction as the first side and the second side, respectively, are folded. Accordingly, the first and second side folded parts are overlapped on the first and second large folded parts, so that the two large folded parts (the first and second large folded parts) are pressed against the bottom surface of the battery 900.

Step S105, folding the third end 803 to cover the top surface.

Through the processes of the above steps S101 to S104, the first large surface, the second large surface, the first side surface, the second side surface, and the bottom surface of the battery 900 are all wrapped and covered with the film material 800. The top portion may accordingly also be covered by folding the third end 803 of the film material 800. Unlike the bottom, large, or side surfaces, the top surface of the battery 900 is wrapped at the edge portion and the remaining portion is exposed, as shown in fig. 8. This is because the battery 900 is provided with electrode terminals (not shown) at the top region, which are exposed when the encapsulation is performed, so as to avoid affecting the normal use of the battery 900 (connecting the positive and negative electrodes).

Corresponding to the coating method of the battery 900 described above, a coating machine is proposed in the example.

Corresponding to the coating method, the coating machine mainly comprises three parts which are a large surface pasting structure, a cutting structure and a folding structure. Wherein paste the big face structure and be used for pasting the big face to the battery, tailor the structure and be used for cutting two characters to the membrane material, hem structure is used for pasting top surface or bottom surface to the battery. Moreover, the above structures can also work relatively independently, so that different functional modules can be selectively executed according to the requirements of the coating method, so as to realize corresponding coating operation.

It should be noted that, in the present application example, the operation mode of the film coating machine is described corresponding to the above film coating method. However, this is not a limitation, and the film coating machine can be used only for carrying out the above film coating method. The coating process shown in fig. 1-a and 1-B can also be performed by using a coating machine as described below.

The coating machine in the application example has the following advantages:

(1) the coating machine can be seamlessly switched to a circular coating mode or a U-shaped coating mode, so that the limitation of equipment is avoided, the market demands of different coating modes are met, and the coating machine has good compatibility.

(2) Because the two devices are combined into one device, the cost of one device is eliminated, and the purchase cost of the device is reduced.

(3) The function of many equipment can be realized to an equipment, consequently, can reduce equipment to improve the workshop utilization ratio, and integrated equipment area is little, and the factory building input cost is low.

(4) The labor cost is saved, and the operation posts of one device are reduced by the integrated device.

The film coating machine in the present application example is described in detail below with reference to the accompanying drawings.

Referring to fig. 9, the film wrapping machine 100 includes a large-face film wrapping device 101, a two-letter shearing device 102, and a folding device 103, which are sequentially arranged according to the process positions. The large-surface enveloping device 101, the double-character cutting device 102 and the folding device are also independently configured and controlled, so that devices and components to be controlled can be selectively used as required.

In the whole process of coating the battery, the battery sequentially passes through the large-surface coating device 101, the two-character cutting device 102 and the edge folding device 103, so that large-surface coating, two-character cutting, bottom surface coating and top surface coating are sequentially completed. In addition, the coating machine can be provided with an outer frame generally, so that each main device is limited in the coating machine, an operator is isolated from each device, the interior of the coating machine is kept clean, and pollution or foreign matter influence is avoided. Accordingly, the external frame may be generally constituted by a metal frame and a plurality of transparent windows (which may be partially opened and closed) provided on the metal frame.

Large-surface coating device 101

The structure of the large-area enveloping device 101 is shown in fig. 10-a, 10-B and 10-C.

The large-area coating device 101 mainly comprises a battery feeding mechanism 1011 and a film pressing mechanism 1012 which are sequentially arranged. The battery feeding mechanism 1011 is mainly used for conveying the battery according to a required posture, and then attaching the film to the surface of the battery at a station of the film pressing mechanism 1012.

In the example, the power feeding battery mechanism 1011 has a tension roller 10113, a first frame 10111 connected in cross-and-cross, and a first conveying rail 10112. A tension roller 10113 is attached to the frame and located at the exit end of the first conveying track 10112.

Wherein the first rack 10111 and the first conveying rail 10112 are arranged in a longitudinal and transverse direction and are matched with each other in spatial position. For example, the first rack 10111 is arranged in a vertical direction, and the first conveying rail 10112 is arranged in a horizontal direction. The first frame 10111 is disposed at an end of the first conveying rail 10112, and tensions the blue film by means of a tension roller 10113 (having a plurality as necessary), and passes the blue film through a horizontal extension line of the first conveying rail 10112. Thus, when the battery is conveyed to the end of the first conveying rail 10112, the surface of the battery can be attached to the blue film.

The first conveying rail 10112 may convey the battery in a pushing manner by means of a pneumatic or hydraulic cylinder. Accordingly, the first conveying rail 10112 may have a rail and a cylinder as a pusher. The piston rod of cylinder can connect the push pedal to can utilize the push pedal to carry out the propelling movement to the battery. Alternatively, the first conveying track 10112 may convey the battery by rollers. Accordingly, the first conveying track 10112 may have a track and a plurality of rollers arranged in sequence in the extending direction thereof, which may be actively rotated. Therefore, the rollers are matched to rotate to convey the batteries.

The battery is conveyed in a pushing mode in the application example, and the track is also provided with rollers capable of rotating passively for stable conveying of the battery. Thereby, the conveying resistance can be reduced by the roller when the battery is pushed. In addition, the posture of the battery in the conveying process can be controlled by selecting the arrangement mode of the rollers. Illustratively, the scroll wheel may have a bottom wheel 112a and a side wheel 112 b. Wherein the bottom rollers provide support for the batteries in the vertical direction and the side wheels 112b provide attitude restraint for the batteries in the width direction of the track.

Further, as an alternative, the battery feeding mechanism 1011 may also be provided with a positioning roller 10114. The registration rollers 10114 may pose a pose restriction on the battery so that it maintains a desired pose. For example, in an example, a registration roller 10114 is connected to the first frame 10111 and positioned at an outlet end of the first conveying rail 10112, and correspondingly, tension rollers 10113 for tensioning the blue film are positioned at both sides of the registration roller 10114. When the battery is transported to the end by the first conveying rail 10112, the battery comes into abutting contact with the tensioned blue film in the horizontal direction, and therefore, the two large faces (the first large face and the second large face) of the battery are clamped from the vertical direction by the positioning rollers 10114, so that it is possible to keep the posture thereof stable while applying a forward thrust to the blue film.

The film feed roller 10115 may be disposed in the battery feed mechanism 1011. The film drawing roller 10115 is connected to the first frame 10111 in a liftable manner and is located at an outlet end of the first conveying rail 10112. The film drawing roller 10115 can be lifted (in the vertical direction) through the matching of a lead screw and a slide block. The film drawing roller 10115 can reset the blue film so as to carry out the next battery film wrapping. Since the blue film has adhesiveness, the film pulling roller 10115 achieves attachment by adhesion to the blue film and pulls the blue film by movement. Generally, the film drawing roller 10115 may cooperate with the tension roller 10113 to tension the blue film.

In an example, the film laminating mechanism 1012 comprises opposite film laminating rollers 10121, a second frame 10122 and a second conveying rail 10123 which are connected in a cross-bar mode, and the film laminating rollers 10121 are located at the inlet end of the second conveying rail 10123.

The squeeze film roller 10121 can be tightly attached to the upper and lower large surfaces of the battery, and the blue film is rolled to be attached to the two large surfaces. The squeeze film rollers 10121 may be two, one above the other and opposite to each other, and may be relatively close to each other or relatively far from each other by a structure such as a screw slider. Illustratively, lamination roller 10121 includes an upper and a lower roller with an adjustable lamination gap therebetween.

The squeeze roller 10121 is adjusted to a proper interval, and the second conveying rail 10123 synchronously conveys the batteries. Namely, the stationary film laminating roller 10121 presses the blue film against the surface of the battery by the pulling action of the second conveying rail 10123. The blue film may have an appropriate length so as to be used corresponding to one battery capsule in one manufacturing process.

But the coating machine can also be provided with a film cutting knife 10124 based on the requirement of continuous production. In an example, the slit film knife 10124 is attached to the second frame 10122. And the film cutting knife 10124 is positioned at an inlet end of the second conveying rail 10123 and can reciprocate in a width direction of the second conveying rail 10123.

Thus, the blue film can be supplied and used in a continuous roll for continuous production. In actual production, the film drawing roller 10115 is bonded to the end of the blue film, the film drawing roller 10115 is located at the lower part of the first frame 10111, and the tension roller 10113 is in contact with the blue film and located at the upper part of the first frame 10111. The blue film is tensioned, and when the battery is conveyed by the first rail to be in contact with the blue film, the film pulling roller 10115 is lifted, and simultaneously the tensioning roller 10113 releases the blue film, so that the blue film is pressed against the surface of the battery by the film pressing roller 10121 of the film pressing mechanism 1012. When the battery is moved to a proper position, the film cutting knife 10124 cuts the blue film, the film drawing roller 10115 is separated from the end of the blue film during the rising process and can be bonded with the new end formed by the cutting of the film cutting knife 10124, and then the film drawing roller 10115 descends and discharges the film along with the tensioning roller 10113, so that the blue film is tensioned again for the film wrapping operation of the next battery.

Two-character cutting device 102

Referring to fig. 11, the word cutting device 102 includes a third frame 1021, a first displacement mechanism 1022, a second displacement mechanism 1023, a clamping mechanism 1024, and a cutter mechanism 1025.

The first and

second displacement mechanisms

1022, 1023 are used to provide drive to move the components as needed. Wherein the first displacement mechanism 1022 can move the second displacement mechanism 1023, the clamp plate mechanism 1024, and the cutter mechanism 1025 as a whole, for example, in the width direction of the second conveying track 10123, to bring the clamp plate mechanism 1024 and the cutter mechanism 1025 close to the blue film. The second displacement mechanism 1023 can drive the cutter mechanism 1025 to move, for example, along the extending direction of the second conveying track 10123, so as to make a two-letter notch.

The third frame 1021 is connected to the second frame 10122 at a side away from the first frame 10111. In other words, the second rack 10122 is located between the first rack 10111 and the third rack. After passing through the large-area coating device, the battery passes through the first frame 10111, enters the film pressing mechanism 1012 from the first conveying rail 10112, is conveyed out by the second conveying rail 10123, and enters the second letter shearing station after being separated from the second frame 10122.

As the name implies, the clipping device 102 is a device for making a two-letter notch at a selected position of the blue membrane. The two-letter cutting is mainly implemented by cutting the blue film through a cutter structure. In order to smoothly perform the cutting operation and to avoid curling, wrinkling, or the like of the blue film (particularly, considering the adhesiveness of the blue film), the clip mechanism 1024 is used to fix the portion of the blue film that requires the clipping of the double line. The blue film is thus clamped by the clamp mechanism 1024 and cut by the cutter mechanism 1025.

Corresponding to the two-letter cut, the cutter mechanism 1025 has two blades and can be driven by the second displacement mechanism 1023, thereby achieving two notches at a time to form a two-letter notch. Alternatively, the cutter structure may have a single blade with two notches formed by two cutting operations.

The clamping mechanism 1024 has two jaws and is driven to open and close by, for example, a movable slider so as to clamp or release the blue film. As a structure for cooperating with the knife mechanism 1025, the clip may be provided with two knife slots (in the present exemplary embodiment) for the blades to pass through. Therefore, the two clamping pieces can have larger contact area with the blue film, and a better clamping effect is achieved. The blade then cuts the blue film through the knife slit. Alternatively, in other examples, one of the clips has a relatively small dimension, such as less than the spacing between two blades. Therefore, the blade can cut the blue film directly by passing through the clip.

Since the battery is a rectangular parallelepiped, two cutouts are formed in the blue film at two places when the battery is cut in a two-letter shape. Therefore, the two-character cutting device is two (one group). Further, two sets of the device for cutting two words may be provided as required, and are respectively located at two sides of the second conveying track 10123. Two binary shearing devices can shear the blue film on the bottom and top of the cell (based on the encapsulation process requirements for this requirement). In the present application example, the two-letter cutting device is a group and located on the same side of the second conveying track 10123, so as to cut two letters on the blue film at the bottom of the battery, and is suitable for a new double-type envelope method. Or, the two-letter shearing device may have two sets, and be located the both sides of second delivery track 10123 respectively, be applicable to current U type diolame mode. Or, the two-letter cutting device may have one group, and two-letter cutting devices in the group are respectively located at two sides of the second conveying track 10123, and are suitable for the existing U-shaped envelope mode.

Hemming device 103

Referring to fig. 12, 13 and 14, the folding device includes a top folding mechanism 1032 and a bottom folding mechanism 1031, which are oppositely disposed, in this example, at both sides of the end of the second conveying rail 10123 in the width direction, and respectively fold the blue films at the top and bottom of the battery to envelope the bottom and top surfaces of the battery.

The top folding mechanism 1032 includes, among other things, a top folding frame 10321, a first top flap 10322 and a second top flap 10323 connected to the top folding frame 10321. Also, the first top flaps 10322 are two and opposed to each other, and the second top flaps 10323 are two and opposed to each other. The two first top flaps 10322 are distributed longitudinally and the two second top flaps 10323 are distributed laterally. Thus, the two first top flaps 10322 and the two second top flaps 10323 apply a hemming operation to the blue film on top of the battery from four orientations.

The bottom folding mechanism 1031 includes a bottom folding frame 10311, and a first bottom flap 10312 and a second bottom flap 10313 arranged in the longitudinal and transverse directions and connected to the bottom folding frame 10311. The first bottom flaps 10312 are two and opposing, and the second bottom flaps 10313 are two and opposing. Accordingly, the two first bottom flaps 10312 and the two second bottom flaps 10313 apply a hemming operation to the blue film at the bottom of the battery from four orientations.

The folding mechanism may perform the folding action by a mechanism that can move linearly, for example, the folding mechanism is implemented by a cylinder and a bending plate that reciprocate linearly. The four edge folding mechanisms are respectively opposite to the parts of the blue film, which need to be folded, and the corresponding bending plates are pushed by the air cylinders to move towards the blue film, so that the blue film is bent and adhered to the battery. Accordingly, the hemming device may be correspondingly equipped with a top displacement mechanism and a bottom displacement mechanism as the above-described linear reciprocating motion apparatus.

In addition, in order to increase the frictional force so that the blue film can be bent while avoiding mechanical damage to the blue film, the bending plate may be sleeved with a rubber sleeve so as to contact the blue film through the rubber sleeve when the blue film is bent.

In the example, for implementing the new dual-type envelope method, the blue film on the top of the battery does not need to be cut into two characters, and the blue film on the bottom of the battery does not need to be cut into two characters. Therefore, corresponding to the blue film structure and the envelope method of this method, the top hemming frame 10321 is driven by four linear reciprocating mechanisms, and the bottom hemming frame 10311 is driven by two linear reciprocating mechanisms and two rotating mechanisms.

When the blue films positioned at the bottom and the top of the battery are bent, the hemming device may be provided with a posture-maintaining member in order to prevent the posture of the battery from being changed. Since the hemming device mainly has two parts, the posture maintaining members correspondingly have two parts. For example, the top and

bottom hemming mechanisms

1032 and 1031 are respectively provided with a pair of pressing plates 104. The pair of pressing plates 104 are oppositely disposed, and each pair of pressing plates 104 can be relatively far away or close to each other, so that the battery can be clamped and fixed. Generally, the platens 104 may be driven by hydraulic cylinders to extend and retract, thereby effecting relative movement between the two platens 104.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A film wrapping machine, characterized by comprising:

the large-surface film coating device is provided with a power transmission battery mechanism and a film pressing mechanism which are sequentially arranged;

the battery feeding mechanism is provided with a tensioning roller, a first rack and a first conveying track which are connected in a transverse and longitudinal mode, the tensioning roller is connected to the rack and located at the outlet end of the first conveying track, the film pressing mechanism comprises film pressing rollers which are arranged oppositely, a second rack and a second conveying track which are connected in a transverse and longitudinal mode, and the film pressing rollers are located at the inlet end of the second conveying track and connected to the second rack;

the device for cutting the double-character pattern comprises a third rack, a first displacement mechanism, a second displacement mechanism, a clamping plate mechanism and a cutter mechanism, wherein the third rack is connected to one side, away from the first rack, of the second rack;

the edge folding device is provided with a top edge folding mechanism and a bottom edge folding mechanism which are arranged oppositely, and the top edge folding mechanism and the bottom edge folding mechanism are distributed on two sides of the tail end of the second conveying track;

the top folding mechanism comprises a top folding frame, a first top folding plate and a second top folding plate, wherein the first top folding plate and the second top folding plate are arranged in the longitudinal and transverse directions and connected to the top folding frame;

the bottom folding mechanism comprises a bottom folding frame, a first bottom folding plate and a second bottom folding plate, wherein the first bottom folding plate and the second bottom folding plate are arranged in the longitudinal and transverse directions and connected to the bottom folding frame;

the large-surface film coating device, the two-character shearing device and the edge folding device are independently configured and sequentially arranged according to the working procedure positions.

2. The film wrapping machine of claim 1, wherein the battery feeding mechanism comprises a positioning roller connected to the first frame and located at an outlet end of the first conveying track, and the tensioning rollers are located at both sides of the positioning roller.

3. The film coating machine according to claim 1 or 2, wherein the battery feeding mechanism comprises a film drawing roller which is connected to the first frame in a liftable manner and is located at the outlet end of the first conveying track.

4. The film wrapping machine according to claim 3, wherein a film cutting knife is connected to the second machine frame, and the film cutting knife is located at the inlet end of the second conveying track and can reciprocate along the width direction of the second conveying track.

5. The film wrapping machine of claim 1, wherein the lamination rollers comprise an upper roller and a lower roller with an adjustable lamination gap therebetween.

6. The film coating machine according to claim 1, wherein the two-letter shearing device has two groups and is respectively located at two sides of the second conveying track.

7. The film wrapping machine of claim 1, 5 or 6, wherein the top folding mechanism and the bottom folding mechanism are respectively provided with a pair of pressing plates, and each pair of pressing plates can be relatively far away or close to each other.

8. The film wrapping machine of claim 1 wherein the first top flap and the second top flap are each linearly reciprocated by a top displacement mechanism attached to the top folding frame.

9. The film wrapping machine of claim 1 or 8 wherein the first bottom flap is linearly reciprocated by a bottom displacement mechanism connected to the bottom folding frame.

10. The film wrapping machine of claim 9 wherein the second bottom flaps are driven in a reciprocating rotary motion by a bottom rotating mechanism attached to the bottom folding frame.