CN219303685U - Photovoltaic cell string repairing device - Google Patents

Abstract

The utility model discloses a photovoltaic cell string repairing device, which comprises a plurality of placing tables, wherein the placing tables are arranged side by side and are used for placing a cell string, each placing table is used for placing only one cell, and the cell string comprises a plurality of cells; the heating assembly is used for heating the abnormal battery piece or the target battery piece placed on the placing table; the welding assembly can move to the upper part of any placement table and comprises a pressing piece, the pressing piece is used for pressing a plurality of first welding strips positioned on a target battery piece on the target battery piece, and the target battery piece is a battery piece placed on the placement table and used for replacing an abnormal battery piece. The photovoltaic cell string repairing device provided by the utility model does not need to heat and weld each welding strip one by one, thereby reducing the labor intensity of workers, shortening the repairing time of the cell string and improving the repairing efficiency of the cell string.

Description

Photovoltaic cell string repairing device

Technical Field

The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic cell string repairing device.

Background

The photovoltaic module includes a photovoltaic laminate including a string of cells formed by connecting a plurality of cells in series by a plurality of solder strips.

At present, when one or more battery pieces in a plurality of battery pieces included in a back contact battery string are abnormal, repair is required. When repairing, the worker usually adopts an electric iron to heat the welding strips on the abnormal battery pieces one by one so as to peel off the welding strips from the abnormal battery pieces, and after the abnormal battery pieces are peeled off and pulled out, the worker also needs to replace new battery pieces, and the welding strips and the new battery pieces are welded one by one through the electric iron. However, the time required for the entire repair process is long, i.e., the repair efficiency of the battery string is low.

Disclosure of Invention

The utility model provides a photovoltaic cell string repairing device, and aims to solve the technical problem of low repairing efficiency of a cell string in the prior art.

The embodiment of the utility model provides a photovoltaic cell string repairing device, which comprises the following components:

the battery string device comprises a plurality of placing tables, a plurality of battery storage units and a plurality of storage units, wherein the placing tables are arranged side by side and are used for placing battery strings, each placing table is used for placing only one battery piece, and each battery string comprises a plurality of battery pieces;

the heating assembly is used for heating the abnormal battery piece or the target battery piece placed on the placing table;

the welding assembly can move to any place the top of platform, welding assembly includes compresses tightly the piece, compress tightly the piece and be used for will be located a plurality of first welding strips on the target battery piece compress tightly on the target battery piece, the target battery piece is place on the platform be used for replacing the battery piece of unusual battery piece.

Optionally, the plurality of placing tables are arranged side by side along a first direction, the welding assembly comprises a mounting plate, the mounting plate can slide along the first direction, the pressing piece comprises a plurality of pressing wheels, the plurality of pressing wheels are arranged at intervals along a second direction, and the first direction is perpendicular to the second direction;

the pressing wheel is rotationally connected to the bottom of the mounting plate, and the axial direction of the pressing wheel is consistent with the second direction; when the mounting plate slides along the first direction above the target battery piece, the pressing wheel is used for rotating and pressing a plurality of first welding strips on the target battery piece.

Optionally, a plurality of deflector plates are arranged at the bottom of the mounting plate, the pinch roller is positioned between the adjacent deflector plates, a rectifying groove is arranged between the adjacent deflector plates, and the rectifying groove is used for guiding the first welding strip.

Optionally, the welding assembly includes first sliding seat and second sliding seat, first sliding seat is used for following first direction slip, second sliding seat sliding connection is in on the first sliding seat, the slip direction of second sliding seat is perpendicular to place the mesa of platform, the mounting panel can dismantle and connect on the second sliding seat.

Optionally, the aligning groove comprises a holding groove and guide grooves arranged at two ends of the holding groove, the holding groove is used for holding the pressing wheel, and the guide grooves comprise a first end deviating from the holding groove and a second end close to the holding groove;

the guide groove gradually decreases in width in the second direction from the first end to the second end.

Optionally, the first end of the pressing wheel is used for pressing the first welding strip to protrude out of the bottom surface of the guide plate, and the distance between the first end of the pressing wheel and the bottom surface of the guide plate is 0.5mm-2mm along the direction perpendicular to the table top of the placing table.

Optionally, a handle hole is formed in one end, facing away from the second sliding seat, of the mounting plate.

Optionally, a fan assembly is disposed on an end of the mounting plate facing away from the puck.

Optionally, a plurality of heating assemblies are arranged and are in one-to-one correspondence with the placing tables; the placing table comprises a table top used for placing the battery pieces, the heating component is arranged below the table top and used for heating the abnormal battery pieces or the target battery pieces placed on the table top through the table top.

Optionally, the device further comprises a heat insulation plate, wherein the heat insulation plate is positioned between the adjacent placing tables.

Optionally, the heat insulation board protrudes from the table top; and the height of the heat insulation plate protruding out of the table top is equal to the thickness of the battery piece along the direction perpendicular to the table top.

Optionally, the device further comprises a first guide rail and supporting seats arranged at two ends of the first guide rail, wherein the first guide rail extends along the first direction, and the first sliding seat is connected to the first guide rail in a sliding manner;

the support seat is provided with a support groove, the first guide rail is arranged in the support groove, and a first gasket is arranged between the first guide rail and the bottom wall of the support groove.

In the embodiment of the utility model, the plurality of battery pieces included in the battery string can be placed through the plurality of placing tables arranged side by side, and the abnormal battery pieces or the target battery pieces placed on the placing tables can be heated through the heating assembly, so that the plurality of welding strips on the abnormal battery pieces are separated, and a worker can conveniently peel the plurality of welding strips from the abnormal battery pieces. In addition, through the arrangement of the welding assembly, after a new target battery piece is replaced, the target battery piece can be heated through the heating assembly, and meanwhile, the plurality of first welding strips positioned on the target battery piece are pressed through the pressing piece, so that the plurality of first welding strips are welded with the target battery piece, in the mode, the welding of the target battery piece and the plurality of first welding strips can be realized at one time, each welding strip is not required to be welded one by one, and therefore the repair operation of a battery string is simplified, the labor intensity of workers is reduced, the repair time of the battery string is shortened, and the repair efficiency of the battery string is improved; in addition, the photovoltaic cell string repairing device provided by the embodiment of the utility model does not need to use an electric soldering iron, and avoids the phenomenon that foreign matters such as tin slag and the like are easy to appear on a welded cell sheet caused by tin dipping of a soldering iron head of the electric soldering iron.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the technical means of the present utility model, as it is embodied in the present specification, and is intended to provide a better understanding of the above and other objects, features and advantages of the present utility model, as it is embodied in the following description.

Drawings

Fig. 1 is a schematic perspective view of a photovoltaic cell string repair device according to an embodiment of the present utility model;

fig. 2 is a schematic side view structure of a photovoltaic cell string repair device according to an embodiment of the present utility model;

fig. 3 is a schematic top view of a photovoltaic cell string repair device according to an embodiment of the present utility model;

fig. 4 is a schematic front view of a photovoltaic cell string repair device according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a welding assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic perspective view of a pinch roller and a guide plate according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a puck and a guide plate according to an embodiment of the present utility model;

FIG. 8 is a second schematic structural view of a puck and a guide plate according to an embodiment of the present utility model;

fig. 9 is a schematic structural diagram of a placement table according to an embodiment of the present utility model;

fig. 10 is a schematic diagram of a second structure of the placement platform according to the embodiment of the present utility model;

fig. 11 is a schematic structural view of a first guide rail and a supporting seat according to an embodiment of the present utility model;

fig. 12 is a schematic structural diagram of a first sliding seat and a second sliding seat according to an embodiment of the present utility model.

Reference numerals:

10-placing table, 11-table top, 12-adsorption hole, 13-temperature display screen, 14-temperature control button, 20-welding component, 21-first sliding seat, 22-second sliding seat, 23-mounting plate, 24-pinch roller, 25-guide plate, 26-righting groove, 27-fan component, 30-rack, 31-rack body, 32-supporting seat, 33-first guide rail, 34-first gasket, 35-reserved table top, 40-heat insulation board, 231-handle hole, 251-connecting part, 252-guide part, 261-guide groove and 321-supporting groove.

Detailed Description

Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

With the rapid development of the photovoltaic industry, the technology of the cells in the photovoltaic module is also rapidly iterated, such as from BSF cells to PERC cells, and then to IBC back contact cells. At present, when one or more battery pieces in the plurality of battery pieces included in the IBC back contact battery string are abnormal, repair is required. When the welding strips on the abnormal battery pieces are stripped by using electric soldering iron and tetrafluorocloth as tools commonly adopted by workers during repair, after the welding strips are heated by holding the electric soldering iron by the workers at a constant speed along the extending direction of the welding strips, the welding strips are lifted off and the abnormal battery pieces and the welding strips are stripped, however, the IBC back contact battery adopts a multi-main grid technology MBB, the number of the welding strips to be welded on the IBC back contact battery is large, and the time consumed by a mode of heating and stripping a plurality of welding strips on the abnormal battery pieces one by one is long; in addition, after the abnormal battery piece is stripped and pulled out, a new battery piece is replaced, and a plurality of welding strips and the new battery piece are welded one by one through an electric soldering iron, namely, a worker can finish repairing the battery string through a plurality of operations, namely, the time required by the whole repairing process is longer, the repairing efficiency of the battery string is lower, the workload of the worker is higher, and the labor intensity is high; in addition, in the process that the electric iron is directly contacted with the welding strip to enable tin on the welding strip to reach a molten state, the soldering iron head of the electric iron is extremely easy to be dipped with tin, and foreign matters such as tin slag and the like are easy to appear on a welded battery piece.

In order to solve the above problems, referring to fig. 1 to 12, an embodiment of the present utility model discloses a photovoltaic cell string repairing apparatus, which includes a plurality of placement tables 10 arranged side by side, a plurality of placement tables 10 for placing a cell string, and each placement table 10 placing only one cell sheet, the cell string including a plurality of cell sheets; a heating assembly for heating the abnormal battery piece or the target battery piece placed on the placement table 10; the welding assembly 20 is movable to the upper part of any placement table 10, and the welding assembly 20 comprises a pressing piece, wherein the pressing piece is used for pressing a plurality of first welding strips on a target battery piece, and the target battery piece is a battery piece placed on the placement table 10 and used for replacing an abnormal battery piece.

Specifically, the single placement stage 10 is used for placing a single battery piece, that is, each placement stage 10 is used for placing only one battery piece, and a plurality of battery pieces included in a battery string can be placed by a plurality of placement stages 10 arranged side by side. The battery pieces included in the battery string are particularly back contact battery pieces, such as IBC battery pieces, namely the photovoltaic battery string repairing device provided by the embodiment of the utility model aims at repairing the back contact battery string, the back contact battery string comprises a plurality of back contact battery pieces connected in series, and the plurality of back contact battery pieces are welded through a scribing and welding integrated machine to form the IBC back contact battery string. The positive electrode and the negative electrode of the back contact battery piece are arranged on the back of the back contact battery piece, a plurality of welding strips are adopted to be welded between the back of the adjacent back contact battery pieces in the back contact battery string to realize interconnection, for example, for one back contact battery piece, the back contact battery piece is adjacent to two back contact battery pieces, the back contact battery piece is connected with one back contact battery piece adjacent to the back contact battery piece through 9 welding strips, the back contact battery piece adjacent to the back contact battery piece is connected with the other back contact battery piece through 10 welding strips, the 9 welding strips and the 10 welding strips are distributed on the back contact battery piece in a staggered mode, namely, 19 welding strips are welded on the back contact battery piece.

The number of the placement tables 10 may be set according to the number of the battery pieces included in the battery string and actual requirements, for example, the number of the placement tables 10 may be set to 5 to 15, specifically, 5, 8, 10, 11, 12, 13, 15, etc. The number of the placement stages 10 is preferably set to 12, and at this time, the 12 placement stages 10 support placement of a battery string including 12 battery pieces at most. The photovoltaic cell string repair device further includes a frame 30, and the plurality of placement stages 10 may be disposed side by side on the frame 30.

The abnormal battery piece, namely the battery piece with the abnormality in the battery string, and the heating temperature of the heating component when heating the abnormal battery piece or the target battery piece can be 60-300 ℃. The heating components can be arranged in a plurality of places, and the heating components are arranged in the placing table 10 and are in one-to-one correspondence with the placing table 10, namely, the heating components are specifically used for heating the battery pieces placed on the placing table 10 corresponding to the heating components. When the number of the placement stages 10 is set to 12, the number of the heating elements is also 12. For the back contact battery string, the front surface of the back contact battery piece included in the back contact battery string can be placed on the placing table 10, and when the heating component heats the back contact battery piece, heat can be transferred from the front surface in contact with the placing table 10 to the back surface. For the abnormal battery piece, after the abnormal battery piece is heated by the heating component, the outer tin of the welding strips on the silver paste of the main grid line on the back of the abnormal battery piece is melted under the condition of gradually increasing temperature, a plurality of welding strips are simultaneously opened to be in a fusion bonding state, and at the moment, a worker can rapidly pull the welding strips one by using bent-tip tweezers so as to peel the welding strips from the abnormal battery piece.

In other embodiments, a heating assembly may be provided that is movable to any of the placement stations 10 to heat an abnormal or target battery cell placed on the placement station 10.

The first welding strips are welding strips on the target battery piece, namely welding strips to be welded on the target battery piece, the first welding strips are arranged in a plurality, the target battery piece is used for replacing the battery piece of the abnormal battery piece after the abnormal battery piece is pulled out of the placement table 10, and the target battery piece is a normal battery piece without problems. After the abnormal battery piece is peeled off from the plurality of welding strips, the abnormal battery piece needs to be extracted, a new target battery piece is replaced and placed at the placement table 10, and then the target battery piece needs to be welded with the plurality of first welding strips. At this time, the welding assembly 20 may be moved to above the placement table 10 for placing the target battery cell, and then the target battery cell is heated by the heating assembly while the plurality of first welding strips on the target battery cell are pressed by the pressing member so that the plurality of first welding strips are welded with the target battery cell.

According to the photovoltaic cell string repairing device provided by the embodiment of the utility model, the plurality of battery pieces included in the battery string can be placed through the plurality of placing tables 10 which are arranged side by side, and the abnormal battery pieces or target battery pieces placed on the placing tables 10 can be heated through the heating component, so that the plurality of welding strips on the abnormal battery pieces are separated, and a worker can conveniently peel the plurality of welding strips from the abnormal battery pieces; in addition, through the arrangement of the welding assembly 20, after a new target battery piece is replaced, the target battery piece can be heated through the heating assembly, and meanwhile, the plurality of first welding strips positioned on the target battery piece are pressed through the pressing piece, so that the plurality of first welding strips are welded with the target battery piece, in the mode, the welding of the target battery piece and the plurality of first welding strips can be realized at one time, each welding strip is not required to be welded one by one, and therefore, the repair operation of a battery string is simplified, the labor intensity of workers is reduced, the repair time of the battery string is shortened, and the repair efficiency of the battery string is improved; in addition, the photovoltaic cell string repairing device provided by the embodiment of the utility model does not need to use an electric soldering iron, and avoids the phenomenon that foreign matters such as tin slag and the like are easy to appear on a welded cell sheet caused by tin dipping of a soldering iron head of the electric soldering iron.

Referring to fig. 1 and 5, the plurality of placement tables 10 are arranged side by side in a first direction, the welding assembly 20 includes a mounting plate 23, the mounting plate 23 is slidable in the first direction, the pressing member includes a plurality of pressing wheels 24, and the plurality of pressing wheels 24 are spaced apart in a second direction, and the first direction is perpendicular to the second direction; the pressing wheel 24 is rotationally connected to the bottom of the mounting plate 23, and the axial direction of the pressing wheel 24 is consistent with the second direction; the pressing wheel 24 is used to rotate and press the plurality of first welding strips on the target battery plate when the mounting plate 23 slides in the first direction above the target battery plate.

Specifically, the placement table 10 may be a rectangular box structure, where the placement table 10 has a longitudinal direction, a width direction and a height direction perpendicular to each other, and the length and the width of the placement table 10 may be set according to the length and the width of the battery piece, for example, the length and the width of the placement table 10 are respectively greater than or equal to the length and the width of the battery piece used for placement. The battery piece is square battery piece, and when the battery piece was placed on placing table 10, the width direction of battery piece was unanimous with the width direction of placing table 10, and the thickness direction of battery piece was unanimous with the direction of height of placing table 10. When the battery piece is placed on the placement table 10, one side in the length direction of the battery piece may be aligned with one side in the length direction of the placement table 10, so as to ensure that the position of the battery piece placed after the placement table 10 is fixed. The rack 30 includes a rack body 31, the rack body 31 has a longitudinal direction, a width direction and a height direction which are perpendicular to each other, the longitudinal direction of the rack body 31 is consistent with the width direction of the placing table 10, and the height direction of the rack body 31 is consistent with the height direction of the placing table 10. When the placement stage 10 has a rectangular box structure, the first direction is identical to the width direction of the placement stage 10. The first direction may refer to the direction indicated by the arrow a in fig. 1, that is, the left-right direction of the photovoltaic cell string repair apparatus shown in fig. 1. The plurality of placing tables 10 may be disposed side by side on the rack body 31 along the first direction. In addition to being slidable in the first direction, the mounting plate 23 is also slidable in a direction perpendicular to the table top 11 of the placement table 10, i.e. in the height direction of the placement table 10.

The extending direction of the welding strips on the battery piece is consistent with the width direction of the battery piece, the intervals among the welding strips welded on the battery piece are fixed, and the welding strips welded on the battery piece are in one-to-one correspondence with the main grid lines on the battery piece. The pinch roller 24 is of a disc-shaped structure, and the whole pinch roller 24 can be made of high-temperature-resistant rubber. The surface of the pressing wheel 24 may be provided with a buffer portion, and the buffer portion is made of a high temperature resistant rubber material, such as a soft high temperature resistant rubber material, so that the buffer portion is pressed against the first welding strip. When the pressing wheel 24 rotates relative to the mounting plate 23, the pressing wheel 24 rotates about the axis of the pressing wheel 24. The spacing between adjacent pinch rollers 24 is matched with the spacing between adjacent main grid lines on the target battery piece, so as to ensure that the plurality of pinch rollers 24 can correspondingly press a plurality of first welding strips on the target battery piece onto a plurality of main grid lines on the target battery piece.

The number of the pressing wheels 24 is determined according to the number of welding strips to be welded on the target battery piece, namely, the number of main grid lines on the target battery piece, for example, the number of the pressing wheels 24 can be equal to the number of welding strips to be welded on the target battery piece. When the number of the welding strips to be welded on the target battery piece is 19, the number of the pressing wheels 24 is 19.

When the target battery piece is welded with the plurality of first welding strips on the target battery piece, the mounting plate 23 can slide to one side of the width direction of the target battery piece along the first direction, then the plurality of pressing wheels 24 press the part of the plurality of first welding strips on one side of the width direction of the target battery piece, then the welding assembly 20 slides to the other side of the width direction of the target battery piece along the first direction, and in the process, the pressing wheels 24 press the first welding strips along the width direction of the target battery piece along the rotation direction, namely, the extending direction of the first welding strips, so that the first welding strips can be all pressed, and the welding of the plurality of first welding strips and the target battery piece is completed. The contact force exerted on the first welding strip by the pressing wheel 24 when the pressing wheel 24 presses the first welding strip is combined with heat provided by the heating assembly when the target battery piece is heated, so that ohmic contact is formed between the first welding strip and the target battery piece, and further welding between the first welding strip and the target battery piece is achieved.

It should be noted that, when the plurality of first welding strips are welded to the target battery piece, all the first welding strips may be welded at one time, and at this time, each pressing wheel 24 of the plurality of pressing wheels 24 is used for pressing the first welding strips while rotating in the rotating process. When the first welding strips are welded with the target battery piece, the first welding strips can be welded twice, and at the moment, part of the pressing wheels 24 in the pressing wheels 24 are used for pressing the first welding strips.

In the embodiment of the utility model, the pressing of a plurality of first welding strips can be correspondingly realized through the arrangement of a plurality of pressing wheels 24; in addition, through the arrangement that the pinch roller 24 is rotationally connected to the mounting plate 23, when the pinch roller 24 compresses the first welding strip, the pinch roller 24 rolls relative to the first welding strip, so that the friction force between the pinch roller 24 and the first welding strip is weakened; in addition, only a small part of the first welding strip is in contact with the pressing wheel 24, so that the tight contact between the welding part of the first welding strip and the target battery piece is ensured, and the welding effect is ensured.

Referring to fig. 1, 3 and 12, the welding assembly 20 includes a first slide seat 21 and a second slide seat 22; the first sliding seat 21 is used for sliding along a first direction, the second sliding seat 22 is slidably connected to the first sliding seat 21, the sliding direction of the second sliding seat 22 is perpendicular to the table top 11 of the placement table 10, and the mounting plate 23 is detachably connected to the second sliding seat 22.

Specifically, the first sliding seat 21 is located at one side of the frame body 31 in the width direction, the first sliding seat 21 can slide along the first direction, and when the first sliding seat 21 slides along the first direction, the second sliding seat 22 and the mounting plate 23 connected to the first sliding seat 21 slide along with the sliding of the first sliding seat 21, so that the welding assembly 20 can move above any placing table 10. When the first sliding seat 21 slides over the target battery piece along the first direction, the plurality of pressing wheels 24 on the mounting plate 23 are located above the battery piece placed on the placement table 10 or the welding strip on the battery piece, and do not contact with the battery piece placed on the placement table 10 or the welding strip on the battery piece. The second sliding seat 22 is slidably connected to the first sliding seat 21 along a direction perpendicular to the table top 11 of the placement table 10, and when the second sliding seat 22 slides relative to the first sliding seat 21, the mounting plate 23 connected to the second sliding seat 22 slides along with the sliding of the second sliding seat 22, so that the plurality of pressing wheels 24 disposed at the bottom of the mounting plate 23 can press the plurality of first welding strips on the target battery piece. The direction perpendicular to the table top 11 of the placement table 10 is identical to the thickness direction of the battery piece placed on the placement table 10, i.e., the up-down direction of the photovoltaic cell string repair device shown in fig. 1.

The two ends of the length direction of the frame body 31 are also provided with reserved table tops 35, a plurality of placing tables 10 are positioned between the two reserved table tops 35, and the welding assembly 20 is initially positioned above the left reserved table top 35. Taking the left-most placing table 10 of the photovoltaic cell string repairing device shown in fig. 1 as a first placing table, taking the cell placed on the second placing table as an abnormal cell as an example, after the abnormal cell is stripped off from a plurality of welding strips on the second placing table, extracting the abnormal cell, replacing a new target cell on the second placing table, firstly sliding the second sliding seat 22 upwards, then sliding the welding assembly 20 from the upper side of the reserved table top 35 to the upper side of the second placing table by rightward sliding of the first sliding seat 21, and then enabling the pressing piece to press a plurality of first welding strips on the target cell by downward sliding of the second sliding seat 22.

In the embodiment of the present utility model, the welding assembly 20 can slide above any placement table 10 by the arrangement of the first sliding seat 21 sliding along the first direction; by arranging the second sliding seat 22, the pressing wheel 24 can not contact with the battery piece and the welding strip in the sliding process of the welding assembly 20 along the first direction, so that the pressing wheel 24 is prevented from damaging other normal battery pieces; and through the arrangement of the second sliding seat 22, the pressing wheel 24 can press a plurality of first welding strips on the target battery piece without being limited by the thickness of the battery piece.

The bottom of mounting panel 23 is provided with a plurality of deflector 25, and pinch roller 24 is located between adjacent deflector 25, has between the adjacent deflector 25 and reforms the groove 26, reforms the groove 26 and is used for the direction of first welding strip.

Specifically, after the plurality of welding strips are stripped from the abnormal battery piece and the new target battery piece is replaced, the positions of the plurality of first welding strips on the target battery piece relative to the main grid line on the target battery piece deviate, and the first welding strips can tilt. A plurality of guide plates 25 may be fixed to the bottom of the mounting plate 23, and the plurality of guide plates 25 may be spaced apart along the second direction, and each pressing wheel 24 may be located between corresponding adjacent guide plates 25. The guide plate 25 may be made of epoxy resin. In the first direction, the length of guide plate 25 is greater than the diameter of puck 24.

The alignment groove 26 is used for aligning and guiding the direction of the first solder strip before the pressing wheel 24 presses the first solder strip. When the position of the first welding strip is offset, before the pressing wheel 24 presses the first welding strip, the first welding strip is contacted with the guide plates, the first welding strip enters the aligning groove 26 between the adjacent guide plates 25 under the condition that the guide plates 25 are folded, and then the first welding strip is pressed by the pressing wheel 24 between the adjacent guide plates 25. In the embodiment of the utility model, the first welding strip can be guided by the arrangement of the guide plate 25, so that the pinch roller 24 can be ensured to be accurately pressed on the first welding strip, and the situation that the pinch roller 24 presses a target battery piece instead of the first welding strip due to the position deviation of the first welding strip is avoided. Of course, when the plurality of first welding strips are welded with the target battery piece, the positions of the first welding strips on the target battery piece can be placed in advance, and at this time, the first welding strips do not need to be guided.

Referring to fig. 8, the rectifying groove 26 includes a receiving groove for receiving the pressing wheel 24, and a guide groove 261 provided at both ends of the receiving groove, the guide groove 261 including a first end facing away from the receiving groove and a second end adjacent to the receiving groove; the guide groove 261 gradually decreases in width in the second direction from the first end to the second end.

Specifically, the length direction of the connection portion 251 coincides with the first direction. The guide plate 25 includes a connection part 251 and guide parts 252 provided at both ends of the connection part 251, and the pressing wheel 24 is positioned between the adjacent connection parts 251. The two guide portions 252 are fixed to both ends of the connecting portion 251 in the longitudinal direction, respectively, and the two guide portions 252 are symmetrically disposed. The length of connection 251 may be the same as the diameter of puck 24. In the second direction, the spacing between adjacent connection portions 251, i.e., the width of the receiving groove, is matched to the thickness of puck 24, e.g., when the thickness of puck 24 is 5mm, the spacing between adjacent connection portions 251 can be 5.2mm. It should be noted that the thickness of puck 24 is greater than the width of the first strap.

The return groove 26 includes a receiving groove between adjacent connecting portions 251 and guide grooves 261 provided at both ends of the receiving groove, the guide grooves 261 being located between adjacent guide portions 252. In the embodiment of the utility model, the width of the guide groove 261 is gradually reduced, so that the deviated first welding strip can be gradually folded until the first welding strip enters the accommodating groove, and the pinch roller 24 accommodated by the accommodating groove can be ensured to accurately press the first welding strip on the main grid line of the target battery piece.

The pressing wheel 24 is used for pressing the first end part of the first welding strip to protrude out of the bottom surface of the guide plate 25, and the distance between the first end part of the pressing wheel 24 and the bottom surface of the guide plate 25 is 0.5mm-2mm along the direction perpendicular to the table top 11 of the placing table 10.

Specifically, the bottom surface of the guide plate 25, that is, the guide plate 25, is close to the surface of the placement stage 10. Referring to fig. 6 and 7, the pressing wheel 24 for pressing the first end of the first welding strip, i.e., the lower end of the pressing wheel 24, is protruded from the bottom surface of the guide plate 25. Referring to fig. 7, the height H1 of the bottom surface of the first end portion projecting guide plate 25 of the pressing wheel 24 in the direction perpendicular to the table surface 11 of the placement table 10 is 0.5mm to 2mm. H1 may be set to 0.5mm, 0.6mm, 1.0mm, 1.5mm, 1.7mm, 2mm, etc. Through the setting that pinch roller 24 is used for compressing tightly the first terminal part protrusion deflector 25 of first welding strip, can guarantee that pinch roller 24 compresses tightly when first welding strip, deflector 25 can not contact other parts of target battery piece, has avoided deflector 25 to damage target battery piece.

In practical application, for one back contact battery piece positioned at the middle position, two sides of the width direction of the back contact battery piece are adjacent to two back contact battery pieces, the back contact battery piece is connected with one back contact battery piece adjacent to the back contact battery piece through 9 welding strips, the back contact battery piece is connected with the other back contact battery piece adjacent to the back contact battery piece through 10 welding strips, and the 9 welding strips and the 10 welding strips are distributed on the back contact battery piece in a staggered mode, namely 19 welding strips are welded on the back contact battery piece. At this time, when the plurality of first bonding pads are bonded to the target battery cell, 9 bonding pads for connection to an adjacent one of the back contact battery cells may be first bonded, and 10 bonding pads for connection to an adjacent other of the back contact battery cells may be bonded. At this time, when welding the target battery piece and the plurality of first welding strips, the welding assembly 20 can slide to one side, such as the right side, of the width direction of the target battery piece along the first direction, then the second sliding seat 22 slides downwards to enable the plurality of pressing wheels 24 to press the parts of the 9 first welding strips positioned on the right side of the target battery piece, and then the welding assembly 20 slides to the other side, namely the left side, of the width direction of the target battery piece slowly and uniformly at the same speed along the first direction, in this process, the first welding strips enter the rectifying groove 26 under the folding of the guide plate 25 and are further guided to the travelling straight line of the pressing wheels 24, and the pressing wheels 24 rotate along the extending direction of the first welding strips to press the 9 first welding strips so as to finish the welding of the 9 first welding strips and the target battery piece; then the welding assembly 20 is positioned at the left side of the target battery piece, the second sliding seat 22 slides downwards to enable the plurality of pressing wheels 24 to press 10 first welding strips at the left side of the target battery piece, then the welding assembly 20 slides to the right side of the target battery piece slowly and uniformly along the first direction, in the process, the first welding strips enter the rectifying groove 26 after being folded by the guide plate 25 and are further guided to the travelling straight line of the pressing wheels 24, and the pressing wheels 24 press 10 first welding strips along the extending direction of the first welding strips while rotating so as to finish welding of the other 10 first welding strips and the target battery piece; after the welding is completed, the welding assembly 20 is again moved over the reserve table 35.

Referring to fig. 2, a handle hole 231 is provided at an end of the mounting plate 23 facing away from the second sliding seat 22.

Specifically, by providing the handle hole 231, a worker can grasp the handle hole 231 on the mounting plate 23 to manually adjust the position of the mounting plate 23, such as manually adjusting the position of the mounting plate 23 up and down and left and right. When the operator manually adjusts the left and right positions of the mounting plate 23, the first sliding seat 21 is driven to slide left and right by the mounting plate 23; when the operator manually adjusts the vertical position of the mounting plate 23, the second sliding seat 22 is driven to slide up and down by the mounting plate 23. In the embodiment of the utility model, the arrangement of the handle hole 231 facilitates the staff to hold the mounting plate 23 when the staff manually adjusts the position of the mounting plate 23. Of course, in other embodiments, the sliding of the first sliding seat 21 and the second sliding seat 22 may be driven by the driving mechanism, that is, the sliding of the first sliding seat 21 and the second sliding seat 22 may drive the position of the mounting plate 23 to change.

Referring to FIG. 5, a fan assembly 27 is provided on the mounting plate 23 at an end facing away from the puck 24.

Specifically, the fan assembly 27 includes a plurality of fans, e.g., the fan assembly 27 may include four fans. The fan assembly 27 also includes a fan knob for controlling the opening and closing of the plurality of fans and adjusting the power level of the plurality of fans. In the embodiment of the utility model, the fan assembly 27 is arranged, so that the surfaces of the welded first welding strips can be cooled, and the rapid cooling and solidification of tin are facilitated.

The heating components are arranged in a plurality and are in one-to-one correspondence with the placing tables 10; the placement table 10 includes a table top 11 for placing the battery pieces, and a heating assembly is provided below the table top 11 for heating the abnormal battery pieces or the target battery pieces placed on the table top 11 through the table top 11.

Specifically, the number of heating elements is the same as the number of placing tables 10, and when the number of placing tables 10 is set to 12, the number of heating elements is also 12. The heating assembly is specifically configured to heat the battery piece placed on the placement table 10 corresponding to the heating assembly. Referring to fig. 9, the mesa 11 is for contacting the battery cell. When the cell is a back contact cell, the mesa 11 is configured to contact the front surface of the back contact cell. The mesa 11 has a heat conductive property. A heating assembly (not shown) may be provided below the table top 11, the heating assembly comprising two resistive tubes which, when energized, generate heat. The heat generated by the heating assembly is transferred through the table top 11 to the battery cells in contact with the table top 11. The body will be transferred to the front side of the back contact cell through the mesa 11 and the heat will be transferred from the front side of the back contact cell to the back side. By arranging a plurality of heating assemblies, when abnormality occurs in a plurality of battery pieces in the plurality of battery pieces included in the battery string, the plurality of abnormal battery pieces can be heated at the same time.

Referring to fig. 10, a plurality of suction holes 12 are provided on a table 11, and the suction holes 12 are used to generate negative pressure and suction the battery sheet placed on the placement table 10. The adsorption hole 12 may be a vacuum adsorption hole. The plurality of suction holes 12 may be uniformly distributed on the table 11. By providing the suction holes 12, the battery piece placed on the table top 11 can be fixed, and defects such as scratch of the battery piece due to positional displacement of the battery piece can be avoided.

The placing table 10 further comprises a first side surface fixed to one side of the table top 11 in the length direction, and a temperature display screen 13 and a temperature control button 14 are arranged on the first side surface. The temperature display screen 13 is used for displaying the temperature when the heating assembly heats, so that a worker can accurately know the temperature when the heating assembly heats, and the temperature when the heating assembly heats can be conveniently adjusted. The temperature control button 14 is used to adjust the temperature of the heating assembly as it heats. The heating temperature of the heating assembly when heating the abnormal battery piece or the target battery piece can be 60-300 ℃, namely the temperature of the heating assembly when heating is adjusted to be 60-300 ℃.

Referring to fig. 9, the photovoltaic cell string repair device provided by the embodiment of the present utility model further includes a heat insulation plate 40, and the heat insulation plate 40 is located between adjacent placement tables 10.

Specifically, the heat insulation board 40 may be made of heat insulation cotton. When the battery string is repaired, only the abnormal battery piece and the target battery piece for replacing the abnormal battery piece are required to be heated, and other battery pieces are not required to be heated.

Referring to fig. 9, the heat insulating plate 40 protrudes from the table 11; the height of the heat insulating plate 40 protruding from the table 11 is equal to the thickness of the battery sheet in the direction perpendicular to the table 11.

Specifically, the table top 11 may be horizontally disposed, and in this case, the heat insulation plate 40 protrudes from the height of the table top 11, i.e., along a direction perpendicular to the table top 11, and the space between the top surface of the heat insulation plate 40 and the table top 11. Referring to fig. 9, the mesa 11 may also be a curved surface for accommodating a curved back contact battery plate. At this time, the heat insulating plate 40 protrudes by the height of the table 11, i.e., the distance between the top surface of the heat insulating plate 40 and the edge of one side of the table 11 in the width direction. In the embodiment of the utility model, the thermal insulation board 40 protrudes out of the table top 11, so that the edge fragments of the battery piece caused by the pressure of the pressing wheel 24 can be avoided.

Referring to fig. 1 and 11, the photovoltaic cell string repair device provided by the embodiment of the utility model further includes a first guide rail 33 and supporting seats 32 disposed at two ends of the first guide rail 33, the first guide rail 33 extends along a first direction, and the first sliding seat 21 is slidably connected to the first guide rail 33; the support seat 32 is provided with a support groove 321, the first guide rail 33 is arranged in the support groove 321, and a first gasket 34 is arranged between the first guide rail 33 and the bottom wall of the support groove 321.

Specifically, the rack 30 includes a support base 32, the support base 32 may be fixed on one side of the rack body 31 in the width direction, and the two support bases 32 are respectively fixed on two ends of the rack body 31 in the length direction. The two support seats 32 are used to support both ends of the first rail 33. The first sliding seat 21 is provided with a second guide rail extending in a direction perpendicular to the table top 11, and the second sliding seat 22 is slidably connected to the second guide rail. The bottom of the second guide rail is also provided with a limiting block, and the limiting block is used for limiting the lowest sliding position of the second sliding seat 22. That is, when no worker holds the mounting plate 23, the mounting plate 23 and the second slide seat 22 are brought into contact with the stopper by gravity, and at this time, the mounting plate 23 and the second slide seat 22 are positioned at the lowest position.

The supporting seat 32 is provided with a supporting groove 321 penetrating through, and the end part of the first guide rail 33 can be fastened and connected in the supporting groove 321 through bolts. The support groove 321 includes a bottom wall contacting the bottom surface of the first rail 33, and the first gasket 34 may be directly placed between the first rail 33 and the bottom wall of the support groove 321. The first spacer 34 may be made of stainless steel, and the thickness of the first spacer 34 may be 50um. The number of the first gaskets 34 may be set according to practical requirements, for example, the number of the first gaskets 34 may be set to 1-5. The thickness of each first gasket 34 in the plurality of first gaskets 34 may or may not be the same. The upper and lower height of the first sliding seat 21 relative to the first guide rail 33 is fixed, and then the upper and lower height of the limiting block relative to the first guide rail 33 is also fixed, and the height of the first guide rail 33 can be adjusted through the arrangement of the first gaskets 34 and the adjustment of the number of the first gaskets 34, so that the height of the limiting block is adjusted, the lowest positions of the mounting plate 23 and the second sliding seat 22 are adjusted, and the pressing piece arranged at the bottom of the mounting plate 23 can adapt to the thickness, the welding strip specification, the solder paste height and the like of different battery pieces.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.

Claims (12)

1. A photovoltaic cell string repair device, comprising:

the battery string device comprises a plurality of placing tables, a plurality of battery storage units and a plurality of storage units, wherein the placing tables are arranged side by side and are used for placing battery strings, each placing table is used for placing only one battery piece, and each battery string comprises a plurality of battery pieces;

the heating assembly is used for heating the abnormal battery piece or the target battery piece placed on the placing table;

the welding assembly can move to any place the top of platform, welding assembly includes compresses tightly the piece, compress tightly the piece and be used for will be located a plurality of first welding strips on the target battery piece compress tightly on the target battery piece, the target battery piece is place on the platform be used for replacing the battery piece of unusual battery piece.

2. The photovoltaic cell string repair device according to claim 1, wherein a plurality of the placement tables are arranged side by side in a first direction, the welding assembly includes a mounting plate slidable in the first direction, the pressing member includes a plurality of pressing wheels, the plurality of pressing wheels are arranged at intervals in a second direction, and the first direction is perpendicular to the second direction;

the pressing wheel is rotationally connected to the bottom of the mounting plate, and the axial direction of the pressing wheel is consistent with the second direction; when the mounting plate slides along the first direction above the target battery piece, the pressing wheel is used for rotating and pressing a plurality of first welding strips on the target battery piece.

3. The photovoltaic cell string repair device according to claim 2, wherein a plurality of guide plates are arranged at the bottom of the mounting plate, the pinch roller is located between adjacent guide plates, and a correction groove is formed between the adjacent guide plates, and is used for guiding the first solder strip.

4. The photovoltaic cell string repair device according to claim 2, wherein the welding assembly comprises a first slide seat and a second slide seat, the first slide seat is used for sliding along the first direction, the second slide seat is slidably connected to the first slide seat, the sliding direction of the second slide seat is perpendicular to the table surface of the placement table, and the mounting plate is detachably connected to the second slide seat.

5. The photovoltaic cell string repair device according to claim 3, wherein the rectifying groove comprises a receiving groove and a guide groove arranged at two ends of the receiving groove, the receiving groove is used for receiving a pinch roller, and the guide groove comprises a first end facing away from the receiving groove and a second end close to the receiving groove;

the guide groove gradually decreases in width in the second direction from the first end to the second end.

6. The photovoltaic cell string repair device according to claim 3, wherein the pressing wheel is configured to press the first end portion of the first solder strip to protrude from the bottom surface of the guide plate, and a distance between the first end portion of the pressing wheel and the bottom surface of the guide plate is 0.5mm to 2mm in a direction perpendicular to the table surface of the placement table.

7. The photovoltaic cell string repair device according to claim 4, wherein a handle hole is provided at an end of the mounting plate facing away from the second sliding seat.

8. The photovoltaic cell string repair device of claim 2, wherein a fan assembly is disposed on an end of the mounting plate facing away from the pinch roller.

9. The photovoltaic cell string repair device according to claim 1, wherein a plurality of heating assemblies are provided and are in one-to-one correspondence with the placement tables; the placing table comprises a table top used for placing the battery pieces, the heating component is arranged below the table top and used for heating the abnormal battery pieces or the target battery pieces placed on the table top through the table top.

10. The photovoltaic cell string repair device of claim 9 further comprising heat shields positioned between adjacent ones of the placement stations.

11. The photovoltaic cell string repair device of claim 10 wherein the thermal shield protrudes from the mesa; and the height of the heat insulation plate protruding out of the table top is equal to the thickness of the battery piece along the direction perpendicular to the table top.

12. The photovoltaic cell string repair device according to claim 4, further comprising a first rail and supporting seats provided at both ends of the first rail, the first rail extending in the first direction, the first sliding seat being slidably connected to the first rail;

the support seat is provided with a support groove, the first guide rail is arranged in the support groove, and a first gasket is arranged between the first guide rail and the bottom wall of the support groove.

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