Conveying bearing surface, conveying belt, conveying device and series welding machine

Abstract

The embodiment of the utility model discloses a conveying bearing surface, a conveying belt, a conveying device and a series welding machine. Wherein the conveying bearing surface comprises a metal bearing surface, and a first type of through holes and a second type of through holes are formed in the metal bearing surface; the first type of through holes are used for ventilating downwards to form negative pressure so as to adsorb the battery piece on the metal bearing surface; and the second type of through holes are used for light of the serial connection device to pass through. According to the embodiment of the utility model, the technical problem of how to improve the wear resistance and the bearing strength of the conveying belt is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment manufacturing, in particular to a conveying bearing surface, a conveying belt, a conveying device and a string welding machine. Background Art

[0002] In the production process of photovoltaic cell modules, cells are welded into cell strings using welding ribbons. During welding, the welding ribbons need to be adhered to specific positions of the cells. In order to reduce the obstruction of the light-receiving area on the surface of the cell, the welding ribbons become thinner and thinner. Before the welding ribbons and cells are stacked together and welded, they will be pre-arranged according to the placement rules of the cell string and then transported to the welding device for serial connection. During the transportation process, in order to ensure that the relative position of the welding ribbon and the cell does not shift, holes will be opened on the conveyor belt, and the cell will be adsorbed and positioned through the holes.

[0003] At present, conveyor belts generally use Teflon conveyor belts, which have relatively poor wear resistance. When conveying battery cells and related press tooling, as the number of battery cells and tooling increases, the wear of the conveyor belt will increase. In addition, the Teflon conveyor belt is a flexible conveyor belt with low bearing strength. When it is necessary to punch holes on the conveyor belt, the bearing strength of the conveyor belt will be further reduced, causing the conveyor belt to deform during the conveying process and unable to stably transfer materials. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a conveying bearing surface, a conveyor belt, a conveying device and a stringing machine to solve the technical problem of how to improve the wear resistance and bearing strength of the conveyor belt.

[0005] In the first aspect, the utility model provides a conveying bearing surface, including a metal bearing surface, on which a first type of through holes and a second type of through holes are provided; the first type of through holes are used for ventilation to form a negative pressure downward to adsorb the battery cells on the metal bearing surface; the second type of through holes are used for allowing light from a serial device to pass through.

[0006] In one embodiment of the above-mentioned conveying bearing surface,

[0007] The first type of through holes are arranged in a band shape along the length direction of the metal bearing surface to form an adsorption band; the second type of through holes are arranged in a band shape along the length direction of the metal bearing surface to form a light-transmitting band; there are multiple adsorption bands and multiple light-transmitting bands, and the number of adsorption bands and the number of light-transmitting bands are the same or different.

[0008] In one embodiment of the above-mentioned conveying bearing surface,

[0009] The first-type through holes on the same adsorption belt are arranged at intervals; the second-type through holes on the same light-transmitting belt are arranged evenly or densely.

[0010] In one embodiment of the above-mentioned conveying bearing surface,

[0011] The plurality of adsorption tapes and the plurality of light-transmitting tapes are arranged alternately in the width direction of the metal bearing surface.

[0012] In one embodiment of the above-mentioned conveying bearing surface,

[0013] Each of the light-transmitting strips includes at least one row of second-type through holes arranged along the length direction of the metal bearing surface; when each of the light-transmitting strips includes at least two rows of second-type through holes arranged along the length direction of the metal bearing surface, the second-type through holes in two adjacent rows in the same light-transmitting strip are staggered.

[0014] In one embodiment of the above-mentioned conveying bearing surface,

[0015] The metal bearing surface is provided with third-type through holes on both sides in the length direction, and the third-type through holes are used to reduce the strength of the metal bearing surface.

[0016] In one embodiment of the above-mentioned conveying bearing surface,

[0017] The third-type through holes on the same side are arranged evenly and staggered, or for the third-type through holes on the same side, the arrangement spacing of the third-type through holes on the outer side is greater than the arrangement spacing of the third-type through holes on the inner side.

[0018] In one embodiment of the above-mentioned conveying bearing surface,

[0019] The arrangement pitch of the third type of through holes is greater than the arrangement pitch of the second type of through holes.

[0020] In one embodiment of the above-mentioned conveying bearing surface,

[0021] The metal bearing surface is provided with an anti-sticking coating; or,

[0022] A light-transmitting anti-sticking film is attached to the metal bearing surface, and the light-transmitting anti-sticking film is attached at least above the second type of through holes.

[0023] In one embodiment of the above-mentioned conveying bearing surface,

[0024] The metal bearing surface is made of metal rigid material.

[0025] In one embodiment of the above-mentioned conveying bearing surface,

[0026] Anti-slip parts are respectively arranged on both sides of the metal bearing surface, and the first type of through holes and the second type of through holes are arranged in the middle of the anti-slip parts.

[0027] In a second aspect, the utility model provides a conveyor belt, wherein the conveyor belt is formed by extending the conveying bearing surface described in any one of the first aspects into a ring shape.

[0028] In a third aspect, the utility model provides a conveying device, comprising a driving device, a support roller, and a conveying belt as described in the second aspect, wherein:

[0029] The conveyor belt is sleeved on the support roller, and the driving device is used to drive the support roller to rotate so as to drive the conveyor belt to rotate;

[0030] The conveying device also includes a bracket and a support plate; the support roller is installed on the bracket, and the support plate is installed on the top of the bracket and is used to support the conveyor belt.

[0031] In one embodiment of the above-mentioned conveying device,

[0032] A heating device is provided inside the support plate, and the heating device is used to heat the soldering tape and battery cells conveyed on the conveyor belt; adsorption holes are provided on the support plate, and the adsorption holes are used to suck air downward from the first type of through holes so that the battery cells are adsorbed on the conveyor belt; grooves are provided on both sides of the support plate, and magnetic parts are provided in the grooves.

[0033] In one embodiment of the above-mentioned conveying device,

[0034] The conveying device also includes a tensioning roller, which is movably arranged on the bracket, and the conveying belt is sleeved on the tensioning roller, and the tensioning roller is used to tension the conveying belt.

[0035] In a fourth aspect, the utility model provides a conveying device, comprising a lifting device and a conveying bearing surface as described in any one of the second aspects, the lifting device comprising a movable frame and a light-transmitting member, the light-transmitting member is installed on the top of the movable frame, and the conveying bearing surface is located above the light-transmitting member, wherein: the light-transmitting member is a light-transmitting bearing strip or a light-transmitting bearing plate.

[0036] In the fifth aspect, the utility model provides a string welding machine, which includes a welding tape feeding device, a battery cell feeding device and a string connection device, wherein the welding tape feeding device and the battery cell feeding device are used to provide welding tape and battery cells to a conveying bearing surface as described in any one of the first aspect, or to a conveying device as described in any one of the third aspect or the fourth aspect, and place the welding tape and battery cells in a string rule, and the string connection device is used to connect the welding tape and battery cells placed in a string rule into a battery string.

[0037] One or more of the above embodiments of the present invention have at least one or more of the following beneficial effects:

[0038] In the technical solution for implementing the utility model, a metal bearing surface is used as the main body of the conveying bearing surface, and two types of through holes are opened on the metal bearing surface. The battery cells are adsorbed through one type of through holes, and the battery string solidification and connection are completed through the other type of holes. The metal bearing surface can effectively improve the bearing strength and wear resistance of the conveyor belt without affecting the adsorption, positioning, conveying and welding functions of the battery cells and welding strips, so that the conveyor belt can transport more battery cells and tooling, thereby improving the battery string welding efficiency.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0041] Figure 1 It is a structural schematic diagram based on the existing conveying bearing surface;

[0042] Figure 2 is a structural schematic diagram of a conveying bearing surface according to an embodiment of the utility model;

[0043] Figure 3 It is a schematic diagram of the light-transmitting belt structure of the conveying bearing surface according to an embodiment of the utility model;

[0044] Figure 4 is a schematic structural diagram of a conveying device according to an embodiment of the utility model;

[0045] Figure 5 It is a structural schematic diagram of a string welding machine according to an embodiment of the utility model;

[0046] Explanation of the reference numerals: 100, metal bearing surface; 101, first type of through hole; 102, second type of through hole; 103, third type of through hole; 201, driving device; 202, supporting roller; 203, conveyor belt; 204, bracket; 205, supporting plate; 301, light-transmitting member; 3011, light-transmitting bearing strip; 302, fixed bearing platform; 3021, fixed beam; 303, welding platform; 304, unloading platform; A, adsorption belt; B, light-transmitting belt. DETAILED DESCRIPTION

[0047] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] As described in the background technology, the existing conveyor belts are made of flexible materials with low bearing strength. Figure 1 As shown, the existing conveyor belt is used to transport battery cells and related tooling on a bearing surface. In order to position the battery cells and welding strips, holes need to be punched on the bearing surface for adsorption and positioning. The adsorption holes reduce the bearing strength of the conveyor belt, and the conveyor belt cannot withstand more holes other than the adsorption function. Therefore, in order to facilitate the serial connection of the battery cells and welding strips to the welding device, the bearing surface usually adopts a transparent film belt, and the transparent film belt is usually made of soft materials such as Teflon, has limited bearing strength, and is easy to wear. Based on this, the utility model creatively proposes a metal bearing surface as the main body of the conveying bearing surface, and two types of through holes are opened on the metal bearing surface. The battery cells are adsorbed through one type of through holes, and the battery string is solidified and connected through the other type of holes. Under the premise of not affecting the adsorption, positioning, conveying and welding functions of the battery cells and welding strips, the bearing strength and wear resistance of the conveyor belt can be effectively improved through the metal bearing surface, so that the conveyor belt can transport more battery cells and tooling, and the battery string welding efficiency is improved.

[0049] In one implementation, the present application provides a conveying bearing surface. Figure 1 This is a schematic diagram of the main components of the conveying bearing surface of this example, and is not intended to indicate the physical dimensions of different components, nor is it intended to indicate the details of the physical arrangement of the components, and components that are not relevant to the understanding of the solution of the utility model are omitted. It should be understood that Figure 1 The transport support surfaces shown are given only as examples; other variations are also possible.

[0050] like Figure 1 As shown, the conveying bearing surface includes a metal bearing surface 100, and the metal bearing surface 100 is provided with a first type of through hole 101 and a second type of through hole 102; the first type of through hole 101 is used to ventilate downward to form a negative pressure to adsorb the battery cell on the metal bearing surface 100, playing the role of adsorbing and positioning the battery cell; the second type of through hole 102 is used to allow light from the serial connection device to pass through, thereby completing the serial connection of the welding strip and the battery cell. Based on the high strength, non-deformation and wear resistance of the metal bearing surface 100, even if multiple types of holes are opened on it, its bearing strength will not be affected. Therefore, by opening the second type of through hole 102, its light transmittance is guaranteed, which does not affect the normal use of the serial connection device, and can carry more battery cells, thereby improving the serial connection efficiency.

[0051] In a possible implementation, Figure 1As shown, the first type of through holes 101 are arranged in a strip shape along the length direction of the metal bearing surface 100 to form an adsorption belt A, so as to facilitate the adsorption and positioning of the battery cell; the second type of through holes 102 are arranged in a strip shape along the length direction of the metal bearing surface 100 to form a light-transmitting belt B, so as to facilitate the continuous passage of light from the welding device for series connection; there are multiple adsorption belts A and light-transmitting belts B, and the number of adsorption belts A and light-transmitting belts B can be the same or different, and can be set and adjusted according to actual transportation and welding requirements, and there is no specific limit on the number.

[0052] In a possible embodiment, the specific arrangement of the adsorption belt A and the light-transmitting belt B is as follows: the first-type through holes 101 on the same adsorption belt A are arranged at intervals, and are used to adsorb and position different battery cells, so as to connect the welding belt and the battery cells in series; the second-type through holes 102 on the same light-transmitting belt B can be arranged evenly or densely, so as to facilitate the passage of light through the series connection device. In order to facilitate the series connection of the battery cells on the adsorption belt A by the series connection device, the adsorption belt A and the light-transmitting belt B are staggered in the width direction of the metal bearing surface 100, so that the battery cells on each adsorption belt A can be conveniently connected in series. Furthermore, each light-transmitting belt B includes at least one row of second-type through holes 102 arranged along the length direction of the metal bearing surface 100; when each light-transmitting belt B includes at least two rows of second-type through holes 102 arranged along the length direction of the metal bearing surface 100, the two adjacent rows of second-type through holes 102 in the same light-transmitting belt B are staggered, for example Figure 3 , which is a partial schematic diagram of the light-transmitting strip B, two adjacent rows of second-type through holes 102 are arranged in a staggered manner so that light from the serial connection device can pass through from various angles, facilitating the serial connection of the battery cell and the solder strip.

[0053] In a possible implementation, Figure 1As shown, the metal bearing surface 100 is provided with third-type through holes 103 on both sides in the length direction. The third-type through holes 103 are used to reduce the strength of the metal bearing surface 100. Since the bearing surface is made of metal, during transportation, when the metal bearing surface 100 runs to a corner or changes the conveying direction, it may be inconvenient to rotate or even jam due to excessive strength. Therefore, some third-type through holes 103 can be opened on both sides to reduce the strength of the metal bearing surface 100, so that the metal bearing surface 100 can be more flexible when it is made into an annular conveyor belt, and the radius of the conveyor belt turning on the roller will be correspondingly reduced, and the operation will be smoother. Further, the third-type through holes 103 on the same side are staggered and evenly arranged, or for the third-type through holes 103 on the same side, the arrangement spacing of the third-type through holes 103 on the outside is greater than the arrangement spacing of the third-type through holes 103 on the inside. This arrangement can appropriately reduce its strength without affecting the normal bearing strength of the metal bearing surface 100 on the battery cells and related tooling, so that it can run more smoothly. In addition, the arrangement pitch of the third type of through holes 103 may be greater than the arrangement pitch of the second type of through holes 102 , forming a wider structural hole belt on both sides of the metal bearing surface 100 , further reducing the strength of the metal bearing surface.

[0054] In one possible embodiment, an anti-sticking coating may be provided on the metal bearing surface 100 to prevent the material transported on the metal bearing surface 100 from sticking to the metal bearing surface; or, a light-transmitting anti-sticking film is applied on the metal bearing surface 100, and the light-transmitting anti-sticking film is applied at least above the second-type through hole 102, which can seal the second-type through hole 102. While not affecting the light of the serial device passing through the second-type through hole 102, it can prevent the material from sticking and effectively prevent foreign matter from entering the second-type through hole. The material of the anti-sticking coating or the light-transmitting anti-sticking film may be Teflon.

[0055] In the above embodiment, the metal bearing surface 100 is made of metal rigid material, for example, steel strip. It should be understood that the shapes of the first type of through holes 101, the second type of through holes 102 and the third type of through holes 103 can be any shape such as long strips, circles or waist holes, without specific limitation.

[0056] In one implementation, both sides of the metal bearing surface 100 are provided with anti-skid parts, and the first type of through hole 101 and the second type of through hole 102 are provided in the middle of the anti-skid parts. The anti-skid parts may be anti-skid belts, such as silicone strips, provided at the edges of the conveying bearing surface in the width direction, or the anti-skid parts may be knurled patterns, frosted patterns, etc. provided at both sides of the metal bearing surface 100 in the width direction. The provision of the anti-skid parts may effectively increase the friction of the metal bearing surface 100, and when the pressing tool of the pressure welding belt is placed on the metal bearing surface 100 for conveying, the pressing tool may be effectively prevented from slipping during the conveying process.

[0057] In one implementation, the anti-slip portion may be disposed between the band formed by the second type through hole 102 and the third type through hole 103 , or may be disposed on the side of the third type through hole 103 away from the second type through hole 102 .

[0058] In one implementation, the present application also provides a delivery device. Figure 4 This is a schematic diagram of the main components of this example, and is not intended to indicate the physical dimensions of different components, nor the details of the physical arrangement of the components, and omits components that are not relevant to the understanding of the present invention. It should be understood that Figure 4 The conveying device shown is given only as an example; other variants are also possible.

[0059] like Figure 4 As shown, the conveying device includes a driving device 201, a supporting roller 202 and a conveyor belt 203. The conveyor belt 203 is formed by extending the conveying bearing surface described in any one of the embodiments in Example 1 into a ring shape. The conveyor belt 203 is used to synchronously convey battery cells, welding strips and related positioning tooling. Since the conveyor belt 203 adopts a metal bearing surface 100, it has the characteristics of high bearing strength and wear resistance, and does not affect the normal positioning, conveying and serial connection of the battery cells and welding strips, thereby achieving the effect of conveying more battery cells and improving the serial connection efficiency. In this example, the conveyor belt 203 is mounted on the support roller 202, and the driving device 201 is used to drive the support roller 202 to rotate to drive the conveyor belt 203 to rotate; the conveying device also includes a bracket 204 and a support plate 205; the support roller 202 is installed on the bracket 204, and the support plate 205 is installed on the top of the bracket 204 and is used to support the conveyor belt 203. During use, the battery cells and welding strips are positioned and adsorbed on the conveyor belt 203, and the driving device 201 drives the support roller 202 to drive the conveyor belt 203 to transport the battery cells. The overall coordination can more stably transport the battery cells, welding strips and related positioning work to ensure the series connection efficiency.

[0060] In some possible embodiments, a heating device is provided in the support plate 205, and the heating device is used to heat the soldering tape and battery cells conveyed on the conveyor belt 203, and to preheat the stacked battery cells, film tapes and soldering tapes, so that the soldering tapes and battery cells can be more conveniently connected in series.

[0061] In some possible embodiments, adsorption holes are provided on the support plate 205, and the adsorption holes are used to suck air downward from the first type of through holes 101 so that the battery cells are adsorbed on the conveyor belt 203. Furthermore, the adsorption holes on the support plate 205 can be arranged one-to-one with the first type of through holes 101, which is more conducive to the adsorption and positioning operation of the battery cells.

[0062] In one implementation, grooves are provided on both sides of the support plate 205, and magnetic members are provided in the grooves. The grooves may be long strip structures extending along the conveying direction, and the magnetic members may be magnets. When the conveying device conveys the press of the pressure welding belt, the magnets may adsorb the press on the conveying belt 203 to prevent the press from slipping when the conveying belt 203 is conveying.

[0063] In some possible embodiments, the conveying device also includes a tensioning roller (not shown in the figure), which is movably arranged on the bracket 204, and the conveyor belt 203 is mounted on the tensioning roller. The conveyor belt 203 can be tensioned to ensure that the conveyor belt 203 is wound around the support roller 202 in a tensioned state, so that the driving device 201 can be driven more smoothly and stably.

[0064] In one implementation, the present application provides a delivery device. Figure 5 This is a schematic diagram of the main components of this example, and is not intended to indicate the physical dimensions of different components, nor the details of the physical arrangement of the components, and omits components that are not relevant to the understanding of the present invention. It should be understood that Figure 5 The conveying device shown is given only as an example; other variants are also possible.

[0065] like Figure 5 As shown, the conveying device includes a lifting device and a conveying bearing surface as described in any of the above-mentioned implementation methods, the lifting device includes a mobile frame (not shown in the figure, it can be understood as a frame that can move in all directions) and a light-transmitting member 301, the light-transmitting member 301 is installed on the top of the mobile frame, and the conveying bearing surface is located above the light-transmitting member 301, wherein: the light-transmitting member 301 is a light-transmitting bearing strip 3011 or a light-transmitting bearing plate. During use, the light-transmitting member 301 is driven to rise, move forward or fall by the moving function of the mobile frame, thereby driving the conveying bearing surface on the light-transmitting member 301 to move in unison, so as to realize the overall conveying movement of the conveying bearing surface from the feeding device to the serial connection device, and can be driven from the welding device to the discharging device, so as to realize the overall conveying movement of the bearing surface. In this mobile conveying mode, the metal bearing surface 100 not only has good bearing strength, but also facilitates the overall movement and conveying of the lifting device, and is suitable for the entire process from feeding, welding to discharging.

[0066] In some possible implementations, the conveying device further includes a fixed carrier 302, which is used to place the battery string. The fixed carrier 302 includes a plurality of fixed beams 3021, and a plurality of beams that can rise and fall and move along the conveying direction are staggered on the light-transmitting member 301 and the fixed carrier 302, such as Figure 5 The light-transmitting bearing bar 3011 and the fixed beam 3021 , the light-transmitting bearing bar 3011 rises from the bottom of the fixed bearing platform 302 , lifts up the battery string, and lifts it onto the welding platform 303 .

[0067] The present application also provides a string welding machine, which includes a solder strip feeding device, a battery cell feeding device and a string connection device. The solder strip feeding device and the battery cell feeding device are used to provide solder strips and battery cells to the conveying bearing surface as described in Example 1, or to the conveying device described above, and place the solder strips and battery cells in a string rule. The string connection device is used to connect the solder strips and battery cells placed in a string rule into a battery string.

[0068] For example, the ribbon feeding device and the cell feeding device of the stringer Figure 5 The conveying device described in the embodiment provides soldering strips and battery cells, the fixed carrier 302 places the soldering strips and battery cells in a string-like pattern, the light-transmitting member 301 of the lifting device lifts the battery string from the fixed carrier 302 and transports it to the welding station 303, after being transported to the welding station 303, the welding device welds the battery cells and soldering strips into a battery string, the mobile frame then drives the beam of the light-transmitting member 301 to lift the battery string on the welding station 303 to the top of the discharge station 304, the beam of the light-transmitting member 301 descends, and the battery string is placed on the discharge station 304, completing the entire battery string welding process. In this example, the conveying bearing surface is attached to the beam on the welding station 303, and the second type of through hole 102 on the conveying bearing surface can allow light from the stringing device to pass through, and can also allow the ejector pin under the welding station 303 to pass through, so as to press the soldering strips tightly against the back of the battery cell.

[0069] In some possible implementations, the string welding machine may further include a vacuum device, which is disposed below the metal bearing surface 100 and provides negative pressure to the first type of through holes 101 to adsorb the battery cells onto the metal bearing surface 100 .

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A conveying bearing surface, It is characterized in that It includes a metal bearing surface, on which a first type of through hole and a second type of through hole are provided; the first type of through hole is used for ventilation to form a negative pressure downward to adsorb the battery cell on the metal bearing surface; the second type of through hole is used for allowing light from the serial device to pass through.

2. The conveying bearing surface according to claim 1, It is characterized in that The first type of through holes are arranged in a band shape along the length direction of the metal bearing surface to form an adsorption band; the second type of through holes are arranged in a band shape along the length direction of the metal bearing surface to form a light-transmitting band; there are multiple adsorption bands and multiple light-transmitting bands, and the number of adsorption bands and the number of light-transmitting bands are the same or different.

3. The conveying bearing surface according to claim 2, It is characterized in that The first-type through holes on the same adsorption belt are arranged at intervals; the second-type through holes on the same light-transmitting belt are arranged evenly or densely.

4. The conveying bearing surface according to claim 2, It is characterized in that The plurality of adsorption tapes and the plurality of light-transmitting tapes are arranged alternately in the width direction of the metal bearing surface.

5. The conveying bearing surface according to claim 2, It is characterized in that Each of the light-transmitting strips includes at least one row of second-type through holes arranged along the length direction of the metal bearing surface; when each of the light-transmitting strips includes at least two rows of second-type through holes arranged along the length direction of the metal bearing surface, the second-type through holes in two adjacent rows in the same light-transmitting strip are staggered.

6. The conveying bearing surface according to claim 1, It is characterized in that The metal bearing surface is provided with third-type through holes on both sides in the length direction, and the third-type through holes are used to reduce the strength of the metal bearing surface.

7. The conveying bearing surface according to claim 6, It is characterized in that The third-type through holes on the same side are arranged evenly and staggered, or for the third-type through holes on the same side, the arrangement spacing of the third-type through holes on the outer side is greater than the arrangement spacing of the third-type through holes on the inner side.

8. The conveying bearing surface according to claim 6, It is characterized in that The arrangement pitch of the third type of through holes is greater than the arrangement pitch of the second type of through holes.

9. The conveying bearing surface according to any one of claims 1 to 8, It is characterized in that The metal bearing surface is provided with an anti-sticking coating; or, A light-transmitting anti-sticking film is attached to the metal bearing surface, and the light-transmitting anti-sticking film is attached at least above the second type of through holes.

10. The conveying bearing surface according to claim 1, It is characterized in that The metal bearing surface is made of metal rigid material.

11. The conveying bearing surface according to claim 1, It is characterized in that Anti-slip parts are respectively arranged on both sides of the metal bearing surface, and the first type through holes and the second type through holes are arranged in the middle of the anti-slip parts.

12. A conveyor belt, It is characterized in that The conveyor belt is formed by extending the conveying bearing surface according to any one of claims 1 to 11 into a ring shape.

13. A conveying device, It is characterized in that The invention comprises a driving device, a support roller and a conveyor belt as claimed in claim 12, wherein: The conveyor belt is sleeved on the support roller, and the driving device is used to drive the support roller to rotate so as to drive the conveyor belt to rotate; The conveying device also includes a bracket and a support plate; the support roller is installed on the bracket, and the support plate is installed on the top of the bracket and is used to support the conveyor belt.

14. The conveying device according to claim 13, It is characterized in that A heating device is provided inside the support plate, and the heating device is used to heat the soldering tape and battery cells conveyed on the conveyor belt; adsorption holes are provided on the support plate, and the adsorption holes are used to suck air downward from the first type of through holes so that the battery cells are adsorbed on the conveyor belt; grooves are provided on both sides of the support plate, and magnetic parts are provided in the grooves.

15. The conveying device according to claim 13 or 14, It is characterized in that The conveying device also includes a tensioning roller, which is movably arranged on the bracket, and the conveying belt is sleeved on the tensioning roller, and the tensioning roller is used to tension the conveying belt.

16. A conveying device, It is characterized in that It comprises a lifting device and a conveying bearing surface as described in any one of claims 1 to 11, wherein the lifting device comprises a movable frame and a light-transmitting member, wherein the light-transmitting member is installed on the top of the movable frame, and the conveying bearing surface is located above the light-transmitting member, wherein: the light-transmitting member is a light-transmitting bearing strip or a light-transmitting bearing plate.

17. A string welding machine, It is characterized in that The stringing machine includes a solder strip feeding device, a battery cell feeding device and a serial connection device. The solder strip feeding device and the battery cell feeding device are used to provide solder strips and battery cells to the conveying bearing surface as described in any one of claims 1 to 11, or to the conveying device as described in any one of claims 13 to 15 or claim 16, and place the solder strips and battery cells in a string rule. The serial connection device is used to connect the solder strips and battery cells placed in a string rule into a battery string.

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