Battery string preparation equipment

Abstract

The utility model relates to the technical field of photovoltaic module manufacturing, and particularly discloses a battery string preparation device. The battery string preparation equipment comprises a semi-finished product battery piece assembly feeding device, a string conveying line, a front face glue film feeding mechanism, a back face glue film feeding mechanism and a second glue applying mechanism. The semi-finished battery piece assembly feeding mechanism can feed semi-finished battery piece assemblies to the bunching conveying line; adsorption holes used for adsorbing and fixing the front adhesive film are formed in the conveying face of the bunching conveying line. The front face adhesive film feeding mechanism and the back face adhesive film feeding mechanism are used for feeding front face adhesive films and back face adhesive films to the bunching conveying line correspondingly. At least two avoiding positions are formed between the back adhesive film and the battery piece and used for avoiding the corresponding adhesive applying positions of the second welding strip section. And the second sizing mechanism can be used for sizing at each sizing position of the second welding strip section, so that the second welding strip section is fixed on the back surface of the corresponding battery piece. According to the battery string preparation device, the string forming quality and efficiency of the battery strings are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of volt-cell assembly manufacturing, in particular to a battery string preparation device. Background Art

[0002] The existing battery string preparation device first stacks a number of battery cells and a number of welding ribbon groups into a string, then lays a front adhesive film group on the front of the battery string, and then turns it over and lays a back adhesive film group on the back of the battery string. However, the battery string prepared by this battery string preparation device is prone to the hot spot effect, which causes the welding ribbon to partially fail to maintain ohmic contact with the silver fine grid lines of the battery cell, thereby affecting the performance of the component.

[0003] Therefore, it is necessary to improve the existing battery string preparation process and equipment to solve the above problems. Summary of the invention

[0004] The utility model aims to provide a battery string preparation device, which improves the stringing quality and efficiency of the battery strings.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A battery string preparation device, comprising a semi-finished battery cell assembly feeding device, a string conveying line, a front adhesive film feeding mechanism, a back adhesive film feeding mechanism and a second adhesive application mechanism;

[0007] The semi-finished battery cell assembly comprises a battery cell and a welding ribbon group, wherein the welding ribbon in the welding ribbon group comprises a first welding ribbon segment and a second welding ribbon segment, wherein the first welding ribbon segment is fixed to the front side of the battery cell by at least two glue points, and the second welding ribbon segment extends out of the battery cell; the semi-finished battery cell assembly feeding mechanism is capable of turning over the semi-finished battery cell assembly and feeding it to the string conveyor line, and covering the second welding ribbon segment on the back side of the battery cell of the previous semi-finished battery cell assembly;

[0008] The conveying surface of the string conveying line is provided with adsorption holes for adsorbing and fixing the front adhesive film;

[0009] The front adhesive film feeding mechanism and the back adhesive film feeding mechanism are used to feed the front adhesive film and the back adhesive film to the string conveyor line respectively, so that the front adhesive film is attached to the bottom surface of the first welding tape segment, and the back adhesive film is attached to the top surface of the second welding tape segment extending to the back of the previous battery cell; wherein at least two avoidance positions are formed between the back adhesive film and the battery cell to avoid the corresponding adhesive application position of the second welding tape segment;

[0010] The second glue applying mechanism can apply glue at each of the glue applying positions of the second welding ribbon segment, so that the second welding ribbon segment is fixed on the back side of the corresponding battery cell.

[0011] Furthermore, the semi-finished cell assembly feeding device comprises a conveying mechanism for conveying the cell and a cell feeding mechanism, a solder strip feeding mechanism, a first glue applying mechanism, a first curing mechanism and a flipping mechanism sequentially arranged along the cell conveying direction;

[0012] The conveying mechanism is provided with a plurality of carriers, and the carriers are provided with a plurality of adsorption holes for adsorbing and fixing the battery sheets and a plurality of solder strip positioning grooves for positioning and placing each of the second solder strip segments;

[0013] The battery cell loading mechanism can load the battery cell onto the carrier with the front side facing upward;

[0014] The solder ribbon feeding mechanism can transport the solder ribbon group to the battery cell located on the carrier;

[0015] The first glue applying mechanism can fix each of the first welding ribbon segments on the front side of the battery cell by applying glue;

[0016] The first curing mechanism is capable of curing each glue point formed by applying glue on the first welding strip segment;

[0017] The flipping mechanism can flip the semi-finished battery cell assembly obtained after curing onto the front adhesive film located at the front end of the string conveyor line.

[0018] Furthermore, the string conveying line has a horizontal section and an inclined section for conveying the front adhesive film toward the horizontal section;

[0019] The front adhesive film feeding mechanism is located at one side of the inclined section and can rotate and transport the cut front adhesive film to the inclined section.

[0020] Furthermore, the front film feeding mechanism includes a rotatable suction cup assembly, a rotating drive member and a linear drive member, the rotation center axis of the suction cup assembly is perpendicular to the inclined section, and includes a plurality of suction cups arranged at an annular interval; the rotating drive member drives the suction cup assembly to rotate; and the linear drive member drives the suction cup assembly to move axially.

[0021] Furthermore, the inclined section is arranged vertically.

[0022] Furthermore, a heating component is provided on a side of the inclined section facing away from its conveying surface, and / or a heating component is provided below an end of the horizontal section close to the inclined section.

[0023] Furthermore, it also includes a limiting press having a plurality of welding strip guide grooves, a limiting press transport mechanism and a limiting press streamline located on one side of the string conveyor line; the limiting press circulates between the limiting press streamline and the string conveyor line, and moves to an initial supply position under the transport of the limiting press streamline; the limiting press transport mechanism is capable of moving the limiting press between the string conveyor line and the limiting press streamline.

[0024] Furthermore, the limiting press comprises a U-shaped press body, the inner width of which is slightly larger than the width of the battery cell; each of the welding strip guide grooves is arranged on a side of the press body away from the outlet end.

[0025] Furthermore, a second heating device is provided above the string conveyor line, and the second heating device can heat the glue spots formed by applying glue on the second welding tape segment and / or the backside glue film attached to the second welding tape segment;

[0026] Alternatively, a third heating device and a light-curing device are provided above the string conveyor line, wherein the third heating device is used to heat the back adhesive film attached to the second welding tape segment, and the light-curing device is used to light-cure the glue spots formed by applying glue on the second welding tape segment.

[0027] Furthermore, the back-side adhesive film feeding mechanism includes a lifting seat, a polygonal prism rotatably arranged on the lifting seat, a cutter assembly and a lifting drive member; each outer side surface of the polygonal prism is provided with a plurality of adsorption holes for adsorbing and fixing the adhesive film, and each of the outer side surfaces is in a horizontal state when it rotates to the bottom; the cutter assembly can cut the adhesive film adsorbed and fixed by the polygonal prism to form a back-side adhesive film; the lifting drive member drives the lifting seat to move up and down.

[0028] The beneficial effects of the utility model are:

[0029] 1. Apply glue to the first and second sections of the solder ribbon to form multiple glue spots. These glue spots can maintain the tension on the solder ribbon when a hot spot effect occurs, so that the solder ribbon can be stably attached to the surface of the battery cell.

[0030] 2. After the adhesive film is attached, the battery will no longer be flipped, which effectively prevents the welding ribbon from detaching from the battery cell during the flipping process, thereby improving the quality of the battery string.

[0031] 3. The whole string making process has a compact rhythm and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a battery string preparation device provided by the utility model.

[0033] Figure 2 yes Figure 1 The enlarged schematic diagram of point I in FIG.

[0034] Figure 3 This is a front view of a battery string preparation device provided by the utility model.

[0035] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle string conveyor line and the front film feeding mechanism.

[0036] Figure 5 yes Figure 1 Schematic diagram of the structure of the front film cutting mechanism.

[0037] Figure 6 yes Figure 1 Schematic diagram of the structure of the limiting press. DETAILED DESCRIPTION

[0038] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figures 1 to 6 As shown, a battery string preparation device includes a semi-finished battery cell assembly feeding device 1, a string conveyor line 3, a front adhesive film feeding mechanism 2, a back adhesive film feeding mechanism and a second adhesive application mechanism.

[0040] Specifically, the semi-finished cell cell assembly includes a cell and a welding tape group, the welding tape in the welding tape group includes a first welding tape segment and a second welding tape segment, the first welding tape segment is fixed to the front of the cell by at least two glue points, and the second welding tape segment extends out of the cell. In the battery string preparation equipment, the semi-finished cell cell assembly feeding mechanism 1 is used to flip the semi-finished cell cell assembly over and feed it to the string conveyor line 3, and cover the second welding tape segment on the back of the cell of the previous semi-finished cell cell assembly; the semi-finished cell cell assembly feeding device 1 includes a conveying mechanism 10 for conveying the cell and a cell feeding mechanism, a welding tape feeding mechanism, a first glue application mechanism, a first curing mechanism and a flipping mechanism 5 arranged in sequence along the cell conveying direction.

[0041] The conveying mechanism 10 includes a rotatable turntable 12 and a plurality of carriers 11 arranged circumferentially on the turntable 12. The carrier 11 is provided with a plurality of adsorption holes for adsorbing and fixing the battery cells, and the carrier 11 is also provided with a plurality of solder strip positioning grooves for positioning and placing each second solder strip segment.

[0042] The cell loading mechanism is used to load the cell onto the carrier plate with the front side facing up, and includes a set of suction cups and a lifting drive module and a linear drive module for driving all the suction cups to lift and move linearly. The lifting drive module can be a cylinder, and the linear drive module can be a linear slide.

[0043] The solder ribbon feeding mechanism is used to carry the solder ribbon group to the battery cell on the carrier 11, and includes a plurality of clamps for clamping and fixing the solder ribbon group and a lifting drive module and a linear drive module for driving all the clamps to lift and move linearly. The lifting drive module can be a cylinder, and the linear drive module can be a linear slide.

[0044] The first glue applying mechanism is used to fix each first welding ribbon segment on the front of the battery cell by applying glue, and includes a set of glue dispensing valves and a lifting drive module and a linear drive module that drive all the glue dispensing valves to lift and move linearly. The lifting drive module can be a cylinder, and the linear drive module can be a linear slide.

[0045] The first curing mechanism is used to cure the glue spots formed on the first welding strip segment. When the glue spots are thermal curing glue, the first curing mechanism adopts infrared heating curing; when the glue spots are UV glue, the first curing mechanism adopts UV curing.

[0046] The flipping mechanism 5 is used to flip the semi-finished battery cell assembly obtained after curing onto the front adhesive film at the front end of the string conveyor line, and includes an incoming material flipping module, a discharge material flipping module, two lifting modules and two transverse movement modules. The incoming material flipping module and the discharge material flipping module both include a fixed component for fixing the battery cell assembly and a rotating module for driving the fixed component to rotate 90°; the two lifting modules are used to drive the incoming material flipping module and the discharge material flipping module to move up and down respectively, and the transverse movement module is used to drive the discharge material flipping module to move horizontally.

[0047] Furthermore, the fixing assembly includes a set of suction cups and a set of clamps; wherein, a set of suction cups is used to absorb and fix the battery cells in the semi-finished battery cell assembly, and a set of clamps is used to clamp and fix the second welding strip segment in the semi-finished battery cell assembly. It should be noted that the clamping position of the clamps in the incoming material turning module is staggered with the clamping position of the clamps in the unloading material turning module to avoid interference. The lifting module is preferably a cylinder, the rotating module is preferably a rotating cylinder, and the traverse module is preferably a linear slide.

[0048] The working process of the semi-finished battery cell assembly feeding mechanism is: first, the battery cell feeding mechanism is used to place the battery cell on the carrier 11 with the front side facing up, and then the solder tape feeding mechanism is used to position and place the prepared solder tape group on the battery cell located on the carrier 11; then, the first glue application mechanism is used to fix each first solder tape segment on the front side of the battery cell; then, the first curing mechanism is used to cure each glue point formed on the first solder tape segment by the glue application, so as to obtain a semi-finished battery cell assembly; finally, the flipping mechanism 5 is used to flip the semi-finished battery cell assembly over to the front glue film located at the front end of the string conveyor line 3.

[0049] In the battery string preparation equipment, adsorption holes for adsorbing and fixing the front adhesive film are opened on the conveying surface of the string conveyor line 3; the string conveyor line 3 is triangular in shape as a whole, and has a horizontal section 31 and an inclined section 32 for conveying the front adhesive film toward the horizontal section 31. Among them, the inclined section 32 is preferably arranged vertically.

[0050] A heating component is provided on the side of the inclined section 32 away from the conveying surface thereof, and / or a heating component is provided below the end of the horizontal section close to the inclined section 32. The heating component is used to heat the adhesive film group adsorbed and fixed on the inclined section 32 and / or the end of the horizontal section 31 close to the inclined section 32, so that the adhesive film has adhesiveness. In this embodiment, the heating component includes a plurality of heating tubes arranged side by side along the conveying direction of the front adhesive film.

[0051] In the battery string preparation equipment, the front adhesive film loading mechanism 2 and the back adhesive film loading mechanism 7 are respectively used to load the front adhesive film and the back adhesive film onto the string conveyor line 3, so that the front adhesive film is attached to the bottom surface of the first welding tape segment, and the back adhesive film is attached to the top surface of the second welding tape segment extending to the back of the previous battery cell; wherein, at least two avoidance positions are formed between the back adhesive film and the battery cell to avoid the corresponding gluing position of the second welding tape segment.

[0052] The front film feeding mechanism 2 is located on one side of the string inclined section 32, and is used to rotate and transport the front film cut by the front film cutting mechanism 4 to the inclined section 32. Figure 5 As shown, the front film cutting mechanism 4 includes a rotatable polygonal cylinder 421, a cutter assembly 422, and a driving assembly for driving the polygonal cylinder 421 to rotate. The outer side of the polygonal cylinder 421 is provided with a plurality of adsorption holes for adsorbing and fixing the film to be cut, and each outer side of the polygonal cylinder 421 is flush with the inclined section 32 in sequence. The driving assembly includes two pulleys 424, a belt connecting the two pulleys 424, and a motor 423, wherein one pulley 424 is coaxially connected to one end of the polygonal cylinder 421, and the other pulley 424 is coaxially connected to the output end of the motor 423. The cutter assembly 422 includes a knife seat, a cutter fixed to the bottom surface of the knife seat, and a cutter driving member driving the knife seat to slide up and down. The cutter driving member is preferably a cylinder.

[0053] The front film feeding mechanism 2 includes a rotatably arranged suction cup assembly 21, a rotating drive member 22 and a linear drive member 23. The rotation center axis of the suction cup assembly 21 is perpendicular to the inclined section 31, and includes a rotating frame 211 and a plurality of suction cups 212 arranged circumferentially and spaced along the rotating frame 211. The rotating drive member 22 drives the suction cup assembly 21 to rotate. The linear drive member 23 drives the suction cup assembly 21 to move axially. In this embodiment, the rotating frame 211 is in a windmill shape. The suction cup 212 is provided with a plurality of adsorption holes, which are connected to at least one through hole provided on the rotating frame 211. The rotating drive member 22 is preferably a rotating cylinder, and the linear drive member 23 is preferably an electric linear slide.

[0054] The back film feeding mechanism 7 includes a lifting seat, a polygonal prism rotatably arranged on the lifting seat, a cutter assembly and a lifting drive; each outer side surface of the polygonal prism is provided with a plurality of adsorption holes for adsorbing and fixing the film, and each outer side surface is in a horizontal state when it rotates to the bottom; the cutter assembly is used to cut the film adsorbed and fixed by the polygonal prism to form a back film; the lifting drive drives the lifting seat to move up and down. The lifting drive is preferably a cylinder. In this embodiment, the structure of the polygonal prism and the cutter assembly in the back film feeding mechanism 7 is the same as the structure of the polygonal column 421 and the cutter assembly 422 in the front film cutting mechanism 4.

[0055] The second glue applying mechanism is used to apply glue at each glue applying position of the second soldering strip segment, so that the second soldering strip segment is fixed on the back side of the corresponding battery cell. The second glue applying mechanism has the same structure as the first glue applying mechanism.

[0056] The battery string preparation equipment also includes a limiting press 61 having a plurality of solder strip guide grooves, a limiting press conveying mechanism 62, and a limiting press streamline 6 located on one side of the string conveying line 3. The limiting press 61 circulates between the limiting press streamline 6 and the string conveying line 3, and moves to the initial supply position under the conveyance of the limiting press streamline 6; the limiting press conveying mechanism 62 can move the limiting press between the string conveying line 3 and the limiting press streamline 6.

[0057] Furthermore, if Figure 6 As shown, the limiting press 61 includes a U-shaped press body, the inner width of which is slightly larger than the width of the battery cell; each welding ribbon guide groove 62 is provided on a side of the press body away from the outlet end. Before the semi-finished battery cell assembly is turned over and placed, the limiting press 61 is placed at the front end of the battery cell of the previous semi-finished battery cell assembly, and each welding ribbon guide groove 62 is used to position a section of each second welding ribbon segment away from the first welding ribbon segment, so that each second welding ribbon segment can be accurately stacked on the back of the battery cell of the previous semi-finished battery cell assembly.

[0058] The limiting press streamline 6 is preferably a belt conveyor line. Two limiting press transport mechanisms 62 are provided, which are respectively located at the front and rear ends of the limiting press streamline 6; the limiting press transport mechanism 62 located at the front end of the limiting press streamline 6 is used to transport the limiting press 61 on the limiting press streamline 6 to the string conveyor line 3, and the limiting press transport mechanism 62 located at the rear end of the limiting press streamline 6 is used to transport the limiting press 61 on the string conveyor line 3 to the limiting press streamline 6. In this embodiment, the limiting press transport mechanism 62 includes a group of suction cups and a lifting drive module and a linear drive module that drive a group of suction cups to lift and move horizontally together. Among them, the lifting drive module can be a cylinder, and the linear drive module can be a linear slide.

[0059] As an embodiment of the utility model, a second heating device is provided above the string conveyor line 3, which is used to cure the heat-curing glue spots formed on the second welding strip segment by glue application and to heat the back adhesive film attached to the back of the second welding strip segment. The second heating device uses infrared radiation heating to heat. In this embodiment, since the curing of the heat-curing glue spots and the heating of the back adhesive film are performed synchronously, the string action beat can be saved, which is conducive to improving the production efficiency of the equipment.

[0060] As another embodiment of the utility model, a third heating device and a second curing device are arranged above the string conveyor line 3. The third heating device is the same as the second heating device and adopts infrared radiation heating to heat the back adhesive film attached to the back of the second welding tape segment; the second curing device adopts UV lamp irradiation to cure the UV glue spots formed by gluing.

[0061] The battery string preparation equipment of the utility model firstly utilizes the front adhesive film feeding mechanism 2 to feed the cut front adhesive film to the inclined section 32 of the string conveying line 3, and then conveys it to one end of the horizontal section 31 close to the inclined section by the inclined section 32; then utilizes the semi-finished battery cell assembly feeding device 1 to feed the semi-finished battery cell assembly to the horizontal section 31, and makes the front adhesive film located in the horizontal section 31 attached to the first welding strip section, and the second welding strip section is stacked on the back of the previous battery cell; then utilizes the back adhesive film feeding mechanism 7 to attach the cut back adhesive film to the second welding strip section located on the back of the battery cell, and then utilizes the second adhesive application mechanism to apply adhesive at the adhesive application position of the second welding strip section exposed at the avoidance position of the back adhesive film, and finally obtains the battery string by heating the back adhesive film and curing the adhesive points.

[0062] The battery string preparation equipment of the utility model forms a plurality of glue spots by dispensing glue on the first welding strip segment and the second welding strip segment. These glue spots can maintain the pulling force on the welding strip when the hot spot effect occurs, so that the welding strip can be stably attached to the surface of the battery cell; after the adhesive film is attached, it is no longer flipped, which effectively prevents the welding strip from detaching from the battery cell during the flipping process, thereby improving the stringing quality of the battery string; the whole string making process has a compact rhythm and high efficiency.

[0063] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A battery string preparation device, characterized in that: It includes a semi-finished battery cell assembly feeding device, a string conveyor line, a front film feeding mechanism, a back film feeding mechanism and a second glue application mechanism; The semi-finished battery cell assembly comprises a battery cell and a welding ribbon group, wherein the welding ribbon in the welding ribbon group comprises a first welding ribbon segment and a second welding ribbon segment, wherein the first welding ribbon segment is fixed to the front side of the battery cell by at least two glue points, and the second welding ribbon segment extends out of the battery cell; the semi-finished battery cell assembly feeding mechanism is capable of turning over the semi-finished battery cell assembly and feeding it to the string conveyor line, and covering the second welding ribbon segment on the back side of the battery cell of the previous semi-finished battery cell assembly; The conveying surface of the string conveying line is provided with adsorption holes for adsorbing and fixing the front adhesive film; The front adhesive film feeding mechanism and the back adhesive film feeding mechanism are used to feed the front adhesive film and the back adhesive film to the string conveyor line respectively, so that the front adhesive film is attached to the bottom surface of the first welding tape segment, and the back adhesive film is attached to the top surface of the second welding tape segment extending to the back of the previous battery cell; wherein at least two avoidance positions are formed between the back adhesive film and the battery cell to avoid the corresponding adhesive application position of the second welding tape segment; The second glue applying mechanism can apply glue at each of the glue applying positions of the second welding ribbon segment, so that the second welding ribbon segment is fixed on the back side of the corresponding battery cell.

2. A battery string preparation device according to claim 1, characterized in that: The semi-finished cell sheet assembly feeding device comprises a conveying mechanism for conveying the cell sheets, and a cell sheet feeding mechanism, a solder strip feeding mechanism, a first glue applying mechanism, a first curing mechanism and a flipping mechanism sequentially arranged along the cell sheet conveying direction; The conveying mechanism is provided with a plurality of carriers, and the carriers are provided with a plurality of adsorption holes for adsorbing and fixing the battery sheets and a plurality of solder strip positioning grooves for positioning and placing each of the second solder strip segments; The battery cell loading mechanism can load the battery cell onto the carrier with the front side facing upward; The solder ribbon feeding mechanism can transport the solder ribbon group to the battery cell located on the carrier; The first glue applying mechanism can fix each of the first welding ribbon segments on the front side of the battery cell by applying glue; The first curing mechanism is capable of curing each glue point formed by applying glue on the first welding strip segment; The flipping mechanism can flip the semi-finished battery cell assembly obtained after curing onto the front adhesive film located at the front end of the string conveyor line.

3. A battery string preparation device according to claim 2, characterized in that: The string conveying line has a horizontal section and an inclined section for conveying the front adhesive film toward the horizontal section; The front adhesive film feeding mechanism is located at one side of the inclined section and can rotate and transport the cut front adhesive film to the inclined section.

4. A battery string preparation device according to claim 3, characterized in that: The front film feeding mechanism includes a rotatably arranged suction cup assembly, a rotating drive member and a linear drive member. The rotation center axis of the suction cup assembly is perpendicular to the inclined section, and includes a plurality of suction cups arranged at an annular interval. The rotating drive member drives the suction cup assembly to rotate; and the linear drive member drives the suction cup assembly to move axially.

5. The battery string preparation device according to claim 3, characterized in that: The inclined section is arranged vertically.

6. The battery string preparation device according to claim 3, characterized in that: A heating component is arranged on the side of the inclined section facing away from the conveying surface thereof, and / or a heating component is arranged below the horizontal section near one end of the inclined section.

7. The battery string preparation device according to claim 1, characterized in that: It also includes a limiting press having a plurality of welding strip guide grooves, a limiting press transport mechanism and a limiting press streamline located on one side of the string conveyor line; the limiting press circulates between the limiting press streamline and the string conveyor line, and moves to an initial supply position under the transport of the limiting press streamline; the limiting press transport mechanism can move the limiting press between the string conveyor line and the limiting press streamline.

8. The battery string preparation device according to claim 7, characterized in that: The limiting press comprises a U-shaped press body, the inner width of which is slightly larger than the width of the battery cell; each of the welding strip guide grooves is arranged on a side of the press body away from the outlet end.

9. The battery string preparation device according to claim 1, characterized in that: A second heating device is arranged above the string conveyor line, and the second heating device can heat the glue points formed by applying glue on the second welding tape segment and / or the back adhesive film attached to the second welding tape segment; Alternatively, a third heating device and a light-curing device are provided above the string conveyor line, wherein the third heating device is used to heat the back adhesive film attached to the second welding tape segment, and the light-curing device is used to light-cure the glue spots formed by applying glue on the second welding tape segment.

10. The battery string preparation device according to claim 1, characterized in that: The back film feeding mechanism includes a lifting seat, a polygonal prism rotatably arranged on the lifting seat, a cutter assembly and a lifting drive member; each outer side surface of the polygonal prism is provided with a plurality of adsorption holes for adsorbing and fixing the film, and each outer side surface is in a horizontal state when it rotates to the bottom; the cutter assembly can cut the film adsorbed and fixed by the polygonal prism to form a back film; The lifting drive member drives the lifting seat to move up and down.

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