CN115224158A - A battery string sticking film device and film sticking method - Google Patents

Abstract

The invention provides a battery string film pasting device and a film pasting method, wherein the film pasting device comprises a welding strip providing device, a battery piece providing device, a conveying device and a pre-fixing device, wherein: the welding strip providing device is used for placing the welding strip group on the conveying device, and the battery piece providing device is used for placing battery pieces on the conveying device to form a battery string; the pre-fixing device pre-fixes the battery strings stacked on the conveying device, so that the battery pieces and the welding strip groups are pre-fixed together; the battery string film pasting device further comprises a film strip pasting device, and the film strip pasting device is used for: the back surface of the battery string is attached with a back surface membrane strip group, each back surface membrane strip is at least attached to one welding strip on the back surface of the battery string, the front surface membrane strip group is attached to the front surface of the battery string, and each front surface membrane strip is at least attached to one welding strip on the front surface of the battery string. The invention can automatically stack the back film strip group and the front film strip group on the battery string, thereby saving the membrane resource and reducing the production cost of the battery string.

Description

A battery string sticking film device and film sticking method

technical field

The invention relates to the field of battery production, in particular to a battery string film sticking device and a film sticking method.

Background technique

The traditional solar cell leads the photo-generated current in the cell to the outside of the cell through the grid lines on it. Considering the final conductivity, the current grid lines are mostly printed with silver paste. It is divided into three busbars, four busbars and multiple busbars.

For the above-mentioned three-busbar, four-busbar and multi-busbar solar cells, at present, a plurality of welding strips are mainly welded to each busbar of the solar cell by flux, so as to obtain a battery composed of several cells connected in series. String, and finally realize the conversion of light energy to electrical energy. However, the battery string obtained by welding the ribbon and the busbar not only has a large shading area, which affects the photoelectric conversion efficiency, but also has a high cost of silver paste. In order to overcome the above problems, busbarless crystalline silicon solar cells have appeared.

The existing busbarless battery cell string method is to stack the whole film sheet on the battery string, and then heat and press the stacked cells, welding tape and film tape, so that the welding tape is melted. The membranes are adhered to the corresponding cell sheets to obtain cell strings.

The disadvantage of the existing busbar-less cell stringing method is that a large amount of film material is required to use a whole piece of film to bond the welding tape and the cell, thereby increasing the production cost of the cell string.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention first provides a battery string film sticking device, which adopts the following technical solutions:

A battery string sticking device, a welding tape providing device, a battery slice providing device, a conveying device, and a pre-fixing device, wherein:

The welding ribbon providing device is used for providing welding ribbon sets, wherein each welding ribbon set includes a plurality of parallel welding strip segments;

The battery sheet providing device is used for providing battery sheets;

The ribbon supplying device and the battery sheet supplying device are configured to cooperate with each other, and stack the ribbon assembly and the battery sheets on the conveying device in a predetermined manner to form a battery string;

The pre-fixing device is configured to pre-fix the battery strings stacked on the conveying device, so that some or all of the stacked battery sheets and the welding ribbon group are pre-fixed and connected together to form a pre-fixed battery string;

The battery string sticking device also includes a film strip coating device, which is used for:

The back of the pre-fixed battery string is covered with a back film strip group, the back film strip group includes a plurality of parallel back film strips, wherein each back film strip is attached to at least one welding tape on the back of the battery string ;and / or,

A front side film strip group is attached to the front side of the pre-fixed battery string, and the front side film strip group includes a plurality of parallel front side film strips, wherein each front side film strip is attached to at least one welding tape on the front side of the battery string .

Through the cooperation of the welding tape providing device, the battery sheet providing device, the conveying device and the pre-fixing device, the battery string film sticking device of the present invention can automatically stack the back film strip group and the front film strip group on the battery string, so that the welding tape and the The battery string is finally bonded by the film strip, thereby reducing the production cost of the battery string.

In some embodiments, the film strip application device includes a battery string conveying mechanism and a film strip application mechanism, and the film strip application device further includes a back film strip roll wound with a back film strip group and/or a front film strip group wound with The front film strip roll, wherein: the battery string conveying mechanism is arranged at the output end of the conveying device, and the battery string conveying mechanism is provided with a conveyor belt for conveying in a direction away from the conveying device; the pre-fixed battery strings on the conveying device are transported from The output end of the device is conveyed to the conveyor belt; the film strip coating mechanism is configured in the process of conveying the battery string by the conveyor belt, and the back surface of the battery string is covered with the back film strip group released from the back film strip roll, and/or, in the The front side of the battery string is attached to the front side film strip group released from the front side film strip roll.

Provided is a film strip sticking device with a simple structure, which receives the pre-fixed battery strings output by the conveying device through the battery string conveying mechanism, and automatically transfers the back film strip group and the front film strip group through the film strip sticking mechanism. Attached to the battery string.

In some embodiments, the film strip applying mechanism includes a film strip pulling mechanism, wherein: the back film strip group unloaded from the back film strip roll is laid on the conveyor belt from the end of the battery string conveying mechanism close to the conveying device, and the conveying device is placed on the conveyor belt. The battery string is transported from the output end of the conveying device to the conveyor belt and pressed on the back film strip group, and the end of the back film strip group protrudes forward of the battery string; and synchronously pull the back film strip group according to the conveying direction of the conveyor belt, so that the back film strip group is gradually attached to the back of the battery string; and/or, the front film strip group released from the front film strip roll is laid on the back On the battery string on the mask strip group, the end of the front film strip group protrudes forward of the battery string, and the film strip pulling mechanism clamps the end of the front film strip group, and pulls the front film strip group synchronously according to the conveying direction of the conveyor belt. , so that the front side film strip group is gradually attached to the front side of the battery string.

A simple-structured film strip sticking mechanism is provided, which pulls the back film strip group and the front film strip group synchronously according to the conveying direction of the conveyor belt through the traction mechanism, so that the back film strip group and the front film strip group are gradually attached to the surface. String on the battery.

In some embodiments, the film strip applying mechanism includes a film strip pressing mechanism, wherein the back film strip group unloaded from the back film strip roll is laid on the conveyor belt from the end of the battery string conveying mechanism close to the conveying device, and the conveying device The battery string on the upper side is conveyed from the output end of the conveying device to the conveyor belt and carried on the back film strip group; and/or, the front film strip group released from the front film strip roll is laid on the battery string on the back film strip group ; The film strip pressing mechanism is used to press the end of the battery string to fix the end of the back film strip group and/or the end of the front film strip group to the battery string, so that when the conveyor belt is transporting the battery string, the The back film strip group and/or the front film strip group is gradually attached to the back side and/or the front side of the battery string.

Another structural film strip coating mechanism is provided, which can make both the back film strip group and the front film strip group move forward with the battery string by pressing the end of the front film strip group laid on the battery string. , so that the back film strip group and the front film strip group are gradually attached to the battery string.

In some embodiments, the conveyor belt includes a first conveyor belt and a second conveyor belt arranged side by side, and after the battery strings on the conveyor device are conveyed from the output end of the conveyor device to the conveyor belt, the first side of the battery strings is placed on the conveyor belt. On the first conveyor belt, the second side edge of the battery string is placed on the second conveyor belt; the film strip stacking mechanism includes a back film strip stacking part and/or a front film strip stacking part, wherein: the back film strip stacking The placing portion is configured to apply the back film strip group to the back of the battery string from below the battery string; and/or the front film strip stacking portion is configured to apply the front film strip group to the battery from above the battery string The front of the string.

Only two edges of the battery string are placed on the conveyor belt, so that the lower surface of the battery string can expose the conveyor belt. That is, the back surface film strip stacking portion and the front surface film strip stacking portion can be applied to the cell sheets from above and below.

In some embodiments, the back film strip stacking part includes a lifting platform, a back film strip pulling assembly and a back film strip cutting assembly, wherein: the back film strip pulling assembly is used for the back film strip group for unwinding the back film strip roll Pulled to the jacking platform, the back film strip cutting assembly is used to cut off the back film strip group located on the jacking platform, and the jacking platform is used to lift the back film strip group upward, so that the back film strip group is attached to the The back of the battery string.

A back film strip stacking part with a simple structure is provided, which lifts the back film strip group from below and sticks it to the battery string through the cooperation of the lifting receiving platform, the back film strip pulling component and the back film strip cutting component. superior.

In some embodiments, the front film strip stacking part includes a front film strip pulling assembly and a front film strip cutting assembly, wherein: the front film strip pulling assembly is used for pulling the front film strip group from the front film strip roll to the battery string. , The front film strip cutting assembly is used to cut the front film strip group, so that the front film strip group is attached to the front side of the battery string.

Provided is a front film strip stacking part with a simple structure, which can attach the front film strip group to the battery string from above through the cooperation of the front film strip pulling component and the front film strip cutting component.

In some embodiments, glue dots are provided on the battery sheets, and each welding tape segment is covered on the corresponding glue dots of the battery sheet; or, the welding tape segment is covered with a hot melt layer; the battery string film sticking device further includes a heating mechanism , the heating mechanism is used to heat the stacked battery strings on the conveying device, so that the glue point or the hot-melt layer is heated and melted; the pre-fixing device is configured to press down the battery strings on the conveying device, so that each welding strip segment is melted The glue point or the molten hot melt layer is bonded to the corresponding battery sheet.

By setting the heating mechanism, the battery string is heated, so that the glue spots on the battery sheets or the hot-melt layer on the surface of the welding tape are heated and melted, and finally, after being pressed by the pre-fixing device, each welding tape segment can be bonded to the corresponding on the battery slice.

In some embodiments, the heating mechanism includes a first heating component and/or a second heating component, wherein: the first heating component is arranged on the conveying device; the second heating component is arranged on the pre-fixing device, and the pre-fixing device is pressed down When the battery strings on the conveying device are conveyed, the second heating assembly heats the stacked battery strings on the conveying device.

By setting the heating mechanism, the heating of the battery string is realized.

The present invention also provides a battery string sticking method, which includes:

stacking the ribbon pack and the battery sheet on the conveying device in a predetermined manner to form a battery string;

Pre-fixing the stacked battery strings, so that some or all of the stacked battery sheets and the welding ribbon group are pre-fixed and connected together to form a pre-fixed battery string;

The back of the pre-fixed battery string is covered with a back film strip group, the back film strip group includes a plurality of parallel back film strips, wherein each back film strip is attached to at least one welding tape on the back of the battery string ;and / or,

A front side film strip group is attached to the front side of the pre-fixed battery string, and the front side film strip group includes a plurality of parallel front side film strips, wherein each front side film strip is attached to at least one welding tape on the front side of the battery string .

The battery string sticking method of the invention can automatically stack the back film strip group and the front film strip group on the battery, so that the welding tape and the battery string are finally bonded through the film strip, thereby reducing the production cost of the battery string.

Description of drawings

FIG. 1 is a schematic structural diagram of a battery string film sticking device provided by an embodiment of the present invention;

Fig. 2 is the enlarged view of E place in Fig. 1;

Fig. 3 is the enlarged view of F place in Fig. 1;

Figures 1 to 3 include the following reference numerals:

Ribbon providing device 1: ribbon roll 11, ribbon pressing mechanism 12, ribbon pressing mechanism 13, ribbon cutting mechanism 14;

conveying device 2;

Prefixing device 3;

Film strip coating device 4: battery string conveying mechanism 41, back film strip roll 42, front film strip roll 43, film strip pulling mechanism 44;

Ribbon guide 5;

String cutting device 6;

The battery string 100, the back film strip group A, and the front film strip group B.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

The existing busbarless battery cell string method is to stack the whole film sheet on the battery string, and then heat and press the stacked cells, welding tape and film tape, so that the welding tape is melted. The membranes are adhered to the corresponding cell sheets to obtain cell strings. The disadvantage is that the use of a whole piece of film to bond the welding tape and the battery sheet requires a lot of film material, thereby increasing the production cost of the battery string.

In view of this, the present invention provides a battery string film sticking device and film sticking method, which can automatically stack the back film strip group and the front film strip group on the battery string, so that the welding tape and the battery string are finally bonded through the film strip. The production cost of the battery string is reduced.

As shown in FIG. 1 , the battery string lamination device provided by the present invention includes a welding tape providing device 1, a battery slice providing device (not shown), a conveying device 2 and a pre-fixing device 3, wherein:

The ribbon providing device 1 is used to provide groups of ribbons, wherein each group of ribbons includes a plurality of parallel ribbon segments.

The battery sheet providing device is used for providing battery sheets.

The ribbon supplying device 1 and the battery sheet supplying device are configured to cooperate with each other, and stack the ribbon assembly and the battery sheets on the conveying device 2 in a predetermined manner to form a battery string.

The target battery string is formed by stacking N+1 ribbon groups and N battery slices in a predetermined manner. The N+1 ribbon groups include 1 and the head ribbon group, 1 tail ribbon group and N-1 A set of intermediate ribbons.

For the battery string that needs to be welded with ribbons on both sides, the stacking method of the ribbon group and the battery slices is as follows: the i-th battery slice is stacked on the second half of the i-th ribbon group, and the i+1-th ribbon The first half of the group is stacked on the ith cell, where i is any natural number between 0 and N. This type of battery string requires welding ribbons on both sides, so film strips need to be attached to both sides.

For the battery string (IBC battery string) that only needs to weld the ribbon on one side, the stacking method of the ribbon and the battery is as follows: the second half of the first ribbon group (ie the head ribbon group) is stacked. on the first cell. The second half of the i-th ribbon group is stacked on the i-th cell. The first half of the i-th ribbon group is stacked on the i-1-th cell, where i is any natural number greater than 1 and less than N+1. The first half of the N+1 th ribbon group (ie, the tail ribbon group) is stacked on the N th cell. In this type of battery string, only one side of the battery string needs to be welded with a welding tape, so correspondingly, only one side of the battery string needs to be covered with a film strip.

The pre-fixing device 3 is configured to pre-fix the battery strings stacked on the conveying device 2, so that some or all of the stacked battery sheets and the welding ribbon group are pre-fixed and connected together to form a pre-fixed battery string 100, It is enough that the welding ribbon group does not shift relative to the cell.

The battery string film sticking device also includes a film strip sticking device 4, wherein:

For the battery string 100 that needs to be welded on both sides after pre-fixing, the film strip coating device 4 is used for:

A backside film strip group is attached to the back of the pre-fixed battery string 100. The backside film strip group includes a plurality of parallel backside film strips, wherein each backside film strip is attached to at least one welding tape on the back of the battery string. superior.

And, the front surface of the battery string 100 after pre-fixed is covered with a front film strip group, and the front film strip group includes a plurality of parallel front film strips, wherein each front film strip is attached to at least one of the front surfaces of the battery string 100. on the root ribbon.

For the pre-fixed battery string 100 that only needs to be welded on one side, there are two cases as follows:

Case 1. If the side of the battery string 100 that needs to be welded faces upwards, the film sticking device 4 is used to: cover the front side of the pre-fixed battery string 100 (that is, the side currently facing upward) The mask strip group, similarly, the front side film strip group includes a plurality of parallel front side film strips, wherein each front side film strip is attached to at least one welding strip on the front side of the battery string.

Case 2. If the side of the battery string 100 that needs to be welded is facing down, the film sticking device 4 is used to: cover the back of the pre-fixed battery string 100 (that is, the side currently facing down) The film strip group, similarly, the back film strip group includes a plurality of parallel back film strips, wherein each back film strip is attached to at least one welding tape on the back of the battery string.

Whether the front film strip or the back film strip specifically covers one welding strip or two or more welding strips, then according to the specific embodiment, the spacing between adjacent welding strips is selected. For example, when the spacing between welding strips is large When the front and back film strips are covered with a corresponding welding strip, and when the distance between the welding strips is small, each front and back film strips can cover two or two adjacent strips correspondingly. Ribbon above the root.

It can be seen that, through the cooperation of the ribbon supply device 1, the cell supply device, the conveying device 2 and the pre-fixing device 3, the battery string film sticking device of the present invention can automatically stack the back film strip group and/or the front film strip group to the battery. on-chip, thereby reducing the production cost of the battery string.

As shown in FIG. 1 and FIG. 2 , optionally, the welding strip providing device 1 includes a plurality of welding strip rolls 11 , a welding strip pressing mechanism 12 , a welding strip cutting mechanism 14 and a welding strip pulling mechanism. The welding strip rolls 11 , The ribbon pressing mechanism 12 , the ribbon cutting mechanism 14 and the ribbon pulling mechanism are arranged in sequence along the extending direction of the ribbon, and the ribbon pulling mechanism pulls the ribbon through the ribbon pressing mechanism 12 and the ribbon cutting mechanism 14 to At the preset position, when the welding strip pressing mechanism 12 presses the welding strip, the welding strip cutting mechanism 14 cuts the welding strip to form a welding strip group including a plurality of welding strip segments, and the welding strip pulling mechanism clamps the cut welding strip. Groups are placed on conveyor 2.

Of course, it can be understood that the welding ribbon providing device 1 can also be a device that directly provides a welding ribbon group.

Optionally, the ribbon providing device 1 further includes a ribbon pressing mechanism 13, and the ribbon pressing mechanism 13 is arranged between the ribbon pressing mechanism 12 and the ribbon cutting mechanism 14, and is used for performing the processing on the ribbon group to be cut. Press to form a bending structure at the position between the two adjacent battery sheets when the ribbon group and the battery sheet are stacked. After bending, the ribbon group forms a step shape between the second half and the first The half section is located below the stepped shape, so that when stacking with the battery sheet, the first half section of the welding tape is suitable for stacking on the previous battery sheet, and the battery sheet is stacked above the second half section.

The specific process of providing the welding strip group by the welding strip providing device 1 is as follows: the welding strip pulling mechanism clamps a plurality of parallel welding strips from the welding strip roll 11, and then pulls the welding strips through the welding strip pressing mechanism 12 and the welding strip pressing mechanism in turn. 13 and the welding strip cutting mechanism 14, when the welding strip is pulled to a preset position, the welding strip pressing mechanism 13 presses the welding strip to form a bending structure, and when the pressing is completed and the welding strip pressing mechanism 13 presses the welding strip , the welding strip cutting mechanism 14 cuts the welding strip to form a welding strip group with a bending structure in the middle position, and then the welding strip pulling mechanism pulls the cut welding strip group to move to the conveying device 2 for laying.

The battery string laminating device also includes a ribbon guide device 5 located at one end of the conveyor device 2 close to the ribbon supply device 1 , and the ribbon guide device 5 guides the ribbon when the ribbon supplier 1 provides the ribbon to the conveyor device 2 . .

In order to realize the pre-fixation between the battery sheet and the welding tape, in some application examples, glue dots are provided on the battery sheet, and each welding tape segment is covered on the corresponding glue dot of the battery sheet during the stacking process. In other application examples, the welding strip section is covered with a hot melt layer. By heating the stacked battery strings, the glue points of the battery sheets or the hot-melt layer on the welding tape segments are in a molten state. At this time, pressure is applied to the battery strings, so that each welding tape segment can be bonded to the corresponding battery sheet. , to achieve pre-fixation.

Optionally, the battery string sticking device further includes a heating mechanism, and the heating mechanism is used to heat the stacked battery strings on the conveying device 2, so that the glue spots on the battery sheets or the hot melt layer on the welding tape are heated and melted. The pre-fixing device 3 is configured to press down the battery string on the conveying device 2 , so that each welding tape segment is adhered to the corresponding battery sheet by the molten glue point or the molten hot-melt layer.

The heating mechanism can be a first heating component arranged on the conveying device 2, such as a heating plate installed under the conveying belt of the conveying device 2. During the process of stacking and conveying the battery strings, the conveying device 2 directly implements the heating of the battery strings. heating. The heating mechanism may also be a second heating assembly disposed on the pre-fixing device 3. When the pre-fixing device 3 presses down the battery string on the conveying device 2, the second heating assembly synchronously heats the battery string.

As shown in FIG. 1 and FIG. 3 , optionally, the film strip coating device 4 includes a battery string conveying mechanism 41, a film strip coating mechanism, a back film strip roll 42 wound with a back film strip group, and/or a back film strip roll 42 wound thereon. Front film strip roll 43 of the front film strip group, in which:

The battery string conveying mechanism 41 is provided at the output end of the conveying device 2 , and the battery string conveying mechanism 41 is provided with a conveying belt for conveying in a direction away from the conveying device.

The pre-fixed battery strings 100 on the conveying device 2 are conveyed from the output end of the conveying device 2 to the conveying belt of the battery string conveying mechanism 41 .

The film sticking mechanism is configured in the process of conveying the battery string by the conveyor belt, and sticks the back film strip group A released from the back film roll 42 on the back of the battery string 100 , and/or sticks it on the front of the battery string 100 . The front film strip group B from which the front film strip roll 43 is unwound. specific:

For the battery string 100 that needs to be welded with soldering tapes on both sides after pre-fixing, the back film strip roll 42 and the front film strip roll 43 need to be provided at the same time. After the pre-fixed battery string 100 is transported from the output end of the conveying device 2 to the conveyor belt of the battery string transport mechanism 41, the film strip coating mechanism attaches the back film strip group A released from the back film strip roll 42 to the battery string. The back side of the battery string 100 , and the front side film strip group B released from the front side film strip roll 43 is attached to the front side of the battery string 100 .

For the battery string 100 that only needs to be soldered on one side after pre-fixing, then:

If the side of the battery string 100 to be welded is facing upwards, only the front film strip roll 43 can be provided, and the film strip coating mechanism attaches the front film strip group released from the front film strip roll 43 to the battery string 100. The front side (ie the side that is currently facing up).

However, if the side of the battery string 100 to be welded is facing down, only the back film strip roll 42 can be provided, and the film strip coating mechanism will stick the back film strip group released from the back film strip roll 42 to the battery string 100 . 's back side (that is, the side that is currently facing down).

Hereinafter, the structure of the film sticking device 4 in the present invention and the film sticking process will be exemplarily described through three embodiments.

first embodiment

As shown in FIG. 3 , in the film strip coating device 4 in this embodiment, the film strip coating mechanism includes a film strip pulling mechanism 44 .

For the battery string 100 that needs to be welded on both sides after pre-fixing, the film sticking process in this embodiment is as follows:

First, the back film strip group A that is controlled to be released from the back film strip roll 42 is laid on the conveyor belt of the battery string conveying mechanism 41 from the end of the battery string conveying mechanism 41 close to the conveying device 2 .

Under the conveying of the conveying device 2, the battery string 100 is conveyed from the output end of the conveying device 2 to the conveyor belt and pressed on the back film strip group A, and ensure that the end of the back film strip group A extends forward of the battery string 100, that is, the battery sheet located at the head end of the battery string 100 is protruded forward.

Next, lay the front film strip group B unloaded from the front film strip roll 43 on the battery string 100 on the back film strip group A, and ensure that the end of the front film strip group B extends forward of the battery string 100 .

Next, the control film strip pulling mechanism 44 simultaneously clamps the end of the back film strip group A and the end of the front film strip group B, and simultaneously pulls the back film strip group A and the front film strip group B according to the conveying direction of the conveyor belt, During this process, the back film strip group A and the front film strip group B are gradually attached to the battery string 100 .

Optionally, in the process of pulling the film strips by the pulling mechanism 44, a pressing tool can be placed on the coated front film strip group B in turn, so as to connect the front film strip group B, the back film strip group A and the battery string. 100 pressed together.

Optionally, a front film cutting device and a back film strip cutting device can also be provided. After the back film strip group and the front film strip group are pasted, the front film cutting device is used to cut the pasted front film strip group. The strip cutting device is used to cut the laminated back film strip group.

When the film strips are attached on both the front and the back of the battery string, the front film cutting device at the front film strip roll cuts the front film strip, and the back film strip cutting device at the back film strip roll cuts the back film strip.

For the battery string 100 that only needs to be soldered on one side after pre-fixing, then:

If the side of the battery string 100 to be welded faces upwards, the film sticking process in this embodiment is as follows:

After the battery string 100 is conveyed from the output end of the conveying device 2 to the conveyor belt of the battery string conveying mechanism 41, the front film strip group B released from the front film strip roll 43 is placed on the battery string 100 on the back film strip group A , and make sure that the end of the front film strip group B extends forward of the battery string 100 .

Next, the control film strip pulling mechanism 44 clamps the end of the front film strip group B, and pulls the front film strip group B synchronously according to the conveying direction of the conveyor belt. During this process, the front film strip group B is gradually attached to the battery string. 100 on the front.

And if the side of the battery string 100 that needs to be welded faces down, the film sticking process in this embodiment is as follows:

First, the back film strip group A that is controlled to be released from the back film strip roll 42 is laid on the conveyor belt of the battery string conveying mechanism 41 from the end of the battery string conveying mechanism 41 close to the conveying device 2 .

Under the conveying of the conveying device 2, the battery string 100 is conveyed from the output end of the conveying device 2 to the conveyor belt and pressed on the back film strip group A, so as to ensure that the end of the back film strip group A extends forward of the battery string 100. .

Next, the control film strip pulling mechanism 44 clamps the end of the back film strip group A, and pulls the back film strip group A synchronously according to the conveying direction of the conveyor belt. During this process, the back film strip group A is gradually attached to the battery string. on the back.

Optionally, for the battery string 100 that only needs to be welded on one side after pre-fixing, a pressing tool can also be used to press the front film strip or the back film strip to the battery string, so as to ensure that the front film strip or the back film strip can be Attached to the battery string 100 . After the application is completed, use the front film strip cutting device or the back film strip cutting device to cut the applied front film strip group or back film strip group.

In order to further improve the sticking effect of the film strip group, optionally, a heating device may be provided under the conveyor belt of the battery string conveying mechanism 41 in this embodiment, and the heating device is used for heating the battery string, the front film strip group and/or the battery string. Or the back film strip group is heated, so that the front film strip group and the back film strip group are melted and bonded to the battery string.

Second Embodiment

In the film strip coating device 4 in this embodiment, the film strip coating mechanism includes a film strip pressing mechanism.

For the battery string 100 that needs to be welded on both sides after pre-fixing, the film sticking process in this embodiment is as follows:

First, the back film strip group A that is controlled to be released from the back film strip roll 42 is laid on the conveyor belt of the battery string conveying mechanism 41 from the end of the battery string conveying mechanism 41 close to the conveying device 2 .

Under the conveyance of the conveying device 2, the battery string 100 is conveyed from the output end of the conveying device 2 to the conveying belt and pressed onto the back film strip group A.

Next, the front film strip group B unloaded from the front film strip roll 43 is laid on the battery string 100 on the back film strip group A.

Next, the film strip pressing mechanism presses the end of the front film strip group B against the end of the battery string 100 . In this way, the front film strip group B and the back film strip group can be transported forward synchronously with the battery string 100 , so that the back film strip group A and the front film strip group B are gradually attached to the battery string 100 .

For the battery string 100 that only needs to be soldered on one side after pre-fixing, then:

If the side of the battery string 100 to be welded faces upwards, the film sticking process in this embodiment is as follows:

After the battery string 100 is conveyed from the output end of the conveying device 2 to the conveyor belt of the battery string conveying mechanism 41, the front film strip group B released from the front film strip roll 43 is laid on the battery string 100 on the back film strip group A superior.

Next, the film strip pressing mechanism presses the end of the front film strip group B against the end of the battery string 100 . In this way, the front film strip group B can be transported forward synchronously with the battery string 100 , so that the front film strip group B is gradually attached to the battery string 100 .

And if the side of the battery string 100 that needs to be welded faces down, the film sticking process in this embodiment is as follows:

First, the back film strip group A controlled to be released from the back film strip roll 42 is laid on the conveyor belt of the battery string conveying mechanism 41 from the end of the battery string conveying mechanism 41 close to the conveying device 2 .

Under the conveyance of the conveying device 2, the battery string 100 is conveyed from the output end of the conveying device 2 to the conveying belt and pressed onto the back film strip group A.

Next, the film strip pressing mechanism is pressed against the end of the battery string 100 . In this way, the back film strip group A can also be pressed and positioned on the back of the battery string 100 , so as to be transported forward synchronously with the battery string 100 , and gradually adhered to the battery string 100 .

In order to further improve the sticking effect of the film strip group, optionally, a heating device may be provided under the conveyor belt of the battery string conveying mechanism 41 in this embodiment, and the heating device is used for the battery string, the front film strip group and the battery string. /or the back film strip group is heated, so that the front film strip group and the back film strip group are melted and adhered to the battery string.

Optionally, in this embodiment, a front film strip cutting device and a back film strip cutting device can also be provided. After the battery string is pasted with the film strip group, the front film strip cutting device and the back film strip cutting device The strip group and the back film strip group are cut off, and when the next battery string is transported in place, the film strip group continues to be applied to the next battery string.

Third Embodiment

In the film strip coating device 4 in this embodiment, the conveyor belt of the battery string conveying mechanism 41 includes a first conveyor belt and a second conveyor belt arranged side by side, and the battery strings on the conveying device 2 are conveyed from the output end of the conveying device. After being placed on the conveyor belt, the first side of the battery string 100 is placed on the first conveyor belt, and the second side edge of the battery string is placed on the second conveyor belt.

In this embodiment, the membrane strip stacking mechanism includes a back membrane strip stacking part and/or a front membrane strip stacking part, wherein: the back membrane strip stacking part is used to attach the back membrane strip assembly from below the battery string 100 . Cover the back of the battery string. The front surface film strip stacking part is used for attaching the front surface film strip group to the front surface of the battery string from above the battery string.

Among them, for the battery string 100 that needs to be welded with welding strips on both sides after pre-fixing, it is necessary to set the back film strip stacking part and the front film strip stacking part at the same time, wherein the back film strip stacking part and the front film strip stacking part are The back film strip group A and the front film strip group B are respectively attached to the back and front of the battery string 100 from below and above the battery string, respectively.

For the battery string 100 that only needs to be welded on one side, only the back film strip stacking part may be provided, or only the front film strip stacking part may be provided.

Optionally, in this embodiment, the back film strip stacking part includes a jack-up receiving platform, a back film strip pulling assembly and a back film strip cutting assembly, wherein: the back film strip pulling assembly is used to release the back film strip roll 42. The back film strip group A is pulled to the jacking platform, the back film strip cutting assembly is used to cut off the back film strip group A located on the jacking platform, and the jacking receiving platform is used to lift the back film strip group A upward, so that the The back film strip group A is attached to the back of the battery string.

Optionally, the front film strip stacking part includes a front film strip pulling assembly and a front film strip cutting assembly, wherein: the front film strip pulling assembly is used for pulling the front film strip group B released from the front film strip roll 43 to the battery string 100. On the other hand, the front film strip cutting assembly is used to cut the front film strip group B drawn to the battery string 100, so that the front film strip group B is attached to the front surface of the battery string.

As shown in FIG. 3 , as shown in FIG. 1 , the battery string film sticking device in the present invention further includes a string cutting device 6 , and the string cutting device 6 is used to divide the whole battery string after the film sticking into a plurality of independent predetermined lengths battery string.

The present invention also provides a method for attaching a film to a battery string, which can be implemented by the device for attaching a film to a battery string provided by any of the above embodiments of the present invention. The battery string sticking method provided by the present invention comprises the following steps:

The ribbon packs and battery sheets are stacked on the conveyor in a predetermined manner to form battery strings.

The stacked battery strings are pre-fixed, so that part or all of the stacked battery sheets and the welding ribbon group are pre-fixed and connected together to form a pre-fixed battery string.

The back of the pre-fixed battery string is covered with a back film strip group, the back film strip group includes a plurality of parallel back film strips, wherein each back film strip is attached to at least one welding tape on the back of the battery string . and / or,

A front side film strip group is attached to the front side of the pre-fixed battery string, and the front side film strip group includes a plurality of parallel front side film strips, wherein each front side film strip is attached to at least one welding tape on the front side of the battery string .

The invention has been described above in sufficient detail with certain particularities. Those of ordinary skill in the art should understand that the descriptions in the embodiments are only exemplary, and all changes made without departing from the true spirit and scope of the present invention should belong to the protection scope of the present invention. The claimed scope of the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims (10)

1. A battery string film sticking device, characterized in that, the battery string sticking film device comprises a welding tape providing device, a battery slice providing device, a conveying device, and a pre-fixing device, wherein: The welding ribbon providing device is used for providing welding ribbon groups, wherein each welding ribbon group includes a plurality of parallel welding ribbon segments; The battery sheet providing device is used for providing battery sheets; The welding ribbon supplying device and the battery sheet supplying device are configured to cooperate with each other, and stack the welding ribbon group and the battery sheet on the conveying device in a predetermined manner to form a battery string; The pre-fixing device is configured to pre-fix the battery strings stacked on the conveying device, so that some or all of the stacked battery sheets and the welding ribbon group are pre-fixed and connected together to form a pre-fixed battery. battery string; The battery string film sticking device further includes a film strip sticking device, and the film stick sticking device is used for: A backside film strip group is attached to the back of the pre-fixed battery string, and the backside film strip group includes a plurality of parallel backside film strips, wherein each of the backside film strips is attached to at least the battery string. on a ribbon on the back of the ; and/or, A front side film strip group is attached to the front side of the pre-fixed battery string, and the front side film strip group includes a plurality of parallel front side film strips, wherein each of the front side film strips is attached to at least the battery string. on a ribbon on the front side. 2 . The battery string film sticking device according to claim 1 , wherein the film strip sticking device comprises a battery string conveying mechanism and a film stick sticking mechanism, and the film stick sticking device further comprises a back film wound with a back film. 3 . Backside film strip rolls of the strip pack and/or front rolls of film strips wound with the front packs of film strips, wherein: The battery string conveying mechanism is arranged at the output end of the conveying device, and the battery string conveying mechanism is provided with a conveying belt for conveying in a direction away from the conveying device; The pre-fixed battery string on the conveying device is conveyed from the output end of the conveying device to the conveying belt; The film strip coating mechanism is configured to cover the back surface film strip group unloaded from the back surface film strip roll on the back of the battery string during the process of conveying the battery string by the conveyor belt, and/or , the front side film strip group released from the front side film strip roll is pasted on the front side of the battery string. 3 . The battery string film sticking device according to claim 2 , wherein the film sticking mechanism comprises a film stick pulling mechanism, wherein: 3 . The back film strip group released from the back film strip roll is laid on the conveyor belt from the end of the battery string conveying mechanism close to the conveying device, and the battery strings on the conveying device are fed from the conveying device. The output end of the device is delivered to the conveyor belt and pressed on the back film strip group, and the end of the back film strip group protrudes forward from the battery string; the film strip pulling mechanism is configured as Clamping the end of the back film strip group, and pulling the back film strip group synchronously according to the conveying direction of the conveyor belt, so that the back film strip group is gradually attached to the back of the battery string; and / or, The front film strip group released from the front film strip roll is laid on the battery string on the back film strip group, and the end of the front film strip group protrudes forward from the battery string, and the film The strip pulling mechanism is configured to clamp the end of the front film strip group, and synchronously pull the front film strip group according to the conveying direction of the conveyor belt, so that the front film strip group is gradually attached to the on the front of the battery string. 4. The battery string film sticking device according to claim 2, wherein the film sticking mechanism comprises a film stick pressing mechanism, wherein: The back film strip group released from the back film strip roll is laid on the conveyor belt from the end of the battery string conveying mechanism close to the conveying device, and the battery strings on the conveying device are fed from the conveying device. The output end of the device is conveyed to the conveyor belt and carried on the back film strip group; And/or, the front film strip group released from the front film strip roll is laid on the battery string on the back film strip group; The film strip pressing mechanism is used for pressing the end of the battery string, so as to fix the end of the back film strip group and/or the end of the front film strip group to the battery string, When the battery string is conveyed by the conveyor belt, the back film strip group and/or the front film strip group is gradually attached to the back and/or front surface of the battery string. 5. The battery string film sticking device of claim 2, wherein: The conveyor belt includes a first conveyor belt and a second conveyor belt arranged side by side. After the battery string on the conveyor device is transported from the output end of the conveyor device to the conveyor belt, the battery string is The first side is placed on the first conveyor belt, and the second side edge of the battery string is placed on the second conveyor belt; The membrane strip stacking mechanism includes a back membrane strip stacking part and/or a front membrane strip stacking part, wherein: The back surface film strip stacking portion is configured to apply the back surface film strip group to the back surface of the battery string from below the battery string; and/or, The front surface film strip stacking portion is configured to apply the front surface film strip group to the front surface of the battery string from above the battery string. 6 . The battery string film sticking device according to claim 5 , wherein the back film strip stacking part comprises a lifting receiving platform, a back film strip pulling assembly and a back film strip cutting assembly, wherein: 6 . The back film strip pulling assembly is used for pulling the back film strip group unloaded from the back film strip roll to the lifting receiving platform, and the back film strip cutting assembly is used for cutting off the back film strips located on the lifting receiving platform The back film strip group is used to lift the back film strip group upward, so that the back film strip group is attached to the back of the battery string. 7. The battery string film sticking device of claim 5, wherein the front film strip stacking part comprises a front film strip pulling assembly and a front film strip cutting assembly, wherein: The front film strip pulling assembly is used for pulling the front film strip group released from the front film strip roll to the battery string, and the front film strip cutting assembly is used for cutting the front film strip group, so that the The front surface film strip group is attached to the front surface of the battery string. 8 . The battery string film sticking device according to claim 1 , wherein glue dots are arranged on the battery sheets, and each of the welding tape segments is covered on the corresponding glue dots of the battery sheet; The welding strip section is covered with a hot melt layer; The battery string sticking device further includes a heating mechanism, and the heating mechanism is used to heat the stacked battery strings on the conveying device, so that the glue point or the hot-melt layer is heated and melted; The pre-fixing device is configured to press down the battery string on the conveying device, so that each of the welding tape segments is adhered to the corresponding battery sheet through a molten glue point or a molten hot-melt layer. 9. The battery string film sticking device of claim 8, wherein: The heating mechanism includes a first heating assembly and/or a second heating assembly, wherein: the first heating assembly is arranged on the conveying device; The second heating assembly is arranged on the pre-fixing device, and when the pre-fixing device presses down the battery string on the conveying device, the second heating assembly heats the stack on the conveying device Good battery string. 10. A method for sticking a film on a battery string, wherein the method for sticking a film on a battery string comprises: stacking the ribbon packs and battery sheets on the conveying device in a predetermined manner to form battery strings; Pre-fixing the stacked battery strings, so that some or all of the stacked battery sheets and the welding ribbon group are pre-fixed and connected together to form a pre-fixed battery string; A backside film strip group is attached to the back of the pre-fixed battery string, and the backside film strip group includes a plurality of parallel backside film strips, wherein each of the backside film strips is attached to at least the battery string. on a ribbon on the back of the ; and/or, A front side film strip group is attached to the front side of the pre-fixed battery string, and the front side film strip group includes a plurality of parallel front side film strips, wherein each of the front side film strips is attached to at least the battery string. on a ribbon on the front side.

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