A welding mesh forming mold and a solar cell welding machine

Abstract

The invention discloses a welding mesh forming mold and a solar cell chip welding machine. The welding mesh forming mold comprises a lower mold base, an upper mold base, a positioning device, a welding device and a cutting device. The upper mold base is movably installed on the lower mold base along the up-down direction. The lower end of the upper mold base is provided with a pressing plate structure. The positioning device is arranged at the upper end of the lower mold base. A plurality of positioning grooves staggered along the left-right and front-back directions are formed on the positioning device. Any two positioning grooves intersect with each other to form an intersecting groove section. The bottom wall of each intersecting groove section is penetrated with a first mounting hole. The welding device comprises a welding column movably installed on each first mounting hole along the up-down direction. The lower end of the welding column is connected with a heating device. The cutting device is arranged on the upper mold base. After the welding strips are positioned in each positioning groove by the positioning device, the upper mold base moves downward to make the pressing plate structure downward close the notches of the plurality of positioning grooves. The welding column moves upward to press against the intersection of two welding strips for welding, and then the plurality of welding strips are cut by the cutting device to form a welding mesh.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic technology, and in particular to a welding mesh forming die and a solar cell sheet welding machine. Background Art

[0002] With the rise in energy prices, the development and utilization of new energy has become the main research topic in the energy field today. Since solar energy has the advantages of being pollution-free, not geographically restricted, and inexhaustible, research on solar power generation has become the main direction for the development and utilization of new energy. Using solar cells to generate electricity is a major way for people to use solar energy today. It promotes the high conversion efficiency of components, drives the continuous reduction of the manufacturing cost of components, and drives the performance of components to improve. This is an inevitable trend in the development of the industry. At present, the crystalline silicon cells used in the market use multiple main grids to be electrically connected by welding ribbons. The current on the cell is collected to the main grid through fine grid lines, and then flows out through the welding ribbons on the main grid lines. However, the width of the fine grid is limited by the screen printing process, and the main grid cannot be too thin because it also shoulders the responsibility of connecting the welding ribbon. A too thin main grid will cause welding difficulties and cannot guarantee welding tension. Summary of the invention

[0003] In response to the above problems, the inventors designed a busbar-free battery cell with a copper wire mesh welding process, which directly connects the battery fine grids through more and thinner welding strips, collects current and realizes battery interconnection, eliminating the traditional busbar at the battery level. Busbar-free batteries increase component power by reducing shading and resistance loss, and reduce costs by using copper wire instead of silver busbars, thereby improving efficiency while reducing costs. Therefore, how to manufacture a welding mesh to replace the busbar is an urgent problem to be solved.

[0004] The main purpose of the present invention is to provide a welding mesh forming die and a solar cell welding machine, aiming to solve the problem of how to weld a welding mesh that replaces a main grid.

[0005] To achieve the above object, the present invention provides a welding mesh forming mold, comprising:

[0006] Lower die seat;

[0007] An upper die base is movably mounted on the lower die base in the up-down direction, and a pressing plate structure is provided at the lower end of the upper die base;

[0008] A positioning device is provided at the upper end of the lower die base, and the positioning device is formed with a plurality of positioning grooves staggered in the left-right and front-back directions, and any two of the positioning grooves intersect with each other to form an intersecting groove section, and a first mounting hole is penetrated through the bottom wall of each of the intersecting groove sections;

[0009] A welding device, comprising a welding column movably mounted on each of the first mounting holes in an up-down direction, wherein a heating device is connected to the lower end of the welding column; and

[0010] A cutting device, arranged on the upper die seat;

[0011] Wherein, each of the positioning grooves is correspondingly penetrated with a welding strip, the upper mold seat moves downward, the pressure plate structure downwardly closes the notches of the plurality of positioning grooves, and the welding column moves upward to press against the intersection of the two welding strips, so that the two welding strips are heated and welded to be connected;

[0012] The cutting device cuts a plurality of welding strips so that the plurality of welding strip segments located in the positioning device form a welding mesh.

[0013] Optionally, the positioning device comprises:

[0014] A positioning plate, wherein the upper end surface of the positioning plate is provided with the plurality of positioning grooves;

[0015] A guide plate is movably mounted on the lower die seat in the up-down direction and is located on one side of the positioning plate, a plurality of guide channels are formed on the upper end of the guide plate, the plurality of guide channels are respectively arranged corresponding to the plurality of positioning grooves, and the plurality of guide channels are used to limit and guide the welding strip from the guide channel to pass through the positioning groove; and

[0016] The guide driving device is arranged on the lower die base and is used for driving the guide plate to move.

[0017] Optionally, a first installation groove is formed at the upper end of the guide plate, a positioning sleeve is provided in the first installation groove, and an inner cavity of the positioning sleeve forms the guide channel.

[0018] Optionally, the heating device comprises:

[0019] An oil heating assembly is movably mounted on the lower die base in an up-and-down direction; and

[0020] A heating drive device, disposed on the lower die base, for driving the oil heating assembly to move;

[0021] Wherein, the lower end of the welding column is arranged at the upper end of the oil heating component.

[0022] Optionally, the oil heating assembly comprises:

[0023] A heating housing is formed with an oil storage chamber; and,

[0024] A connecting pipeline, including a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe and the liquid outlet pipe are both connected to the oil storage chamber;

[0025] Wherein, the lower end of the welding column is mounted to the upper end of the heating shell.

[0026] Optionally, the welding column is arranged in steps, including a first welding column segment, a second welding column segment and a third welding column segment which are distributed from bottom to top and whose outer diameters gradually decrease;

[0027] The oil heating assembly also includes:

[0028] A heat conducting plate is attached to the heating shell and arranged on the upper end surface of the heat conducting plate, the upper end surface of the heat conducting plate is provided with a second mounting groove, and the bottom wall of the second mounting groove is provided with a plurality of receiving grooves;

[0029] A synchronization holding block is arranged in the second mounting groove, and each of the synchronization holding blocks is penetrated by a plurality of second mounting holes;

[0030] A plurality of preload springs, wherein the lower end of each preload spring is correspondingly arranged in each of the receiving grooves;

[0031] a first limiting plate having a plurality of third mounting holes therethrough, the limiting plate being disposed on the upper end surface of the heat conducting plate to close the notch of the second mounting slot; and

[0032] A second limiting plate is mounted on the lower die base and is located above the first limiting plate, and the second limiting plate is provided with a plurality of fourth mounting holes;

[0033] Wherein, the positioning plate is arranged on the upper end surface of the second limiting plate;

[0034] The lower end of each first welding column segment is pressed against the upper end of the preload spring, each second welding column segment is correspondingly inserted into the second mounting hole and the third mounting hole, and each third welding column segment is correspondingly inserted into the fourth mounting hole and is arranged in the first mounting hole.

[0035] Optionally, the oil heating assembly further comprises a cooling fan disposed on the lower die base, and the cooling fan is located below the heating shell; and / or,

[0036] The oil heating assembly also includes a thermocouple arranged on the lower die base, and the thermocouple is connected to the heating shell.

[0037] Optionally, the welding mesh forming mold further includes:

[0038] A connecting seat, fixedly mounted to the lower die seat;

[0039] An upper die mounting seat, wherein the upper die seat is arranged on the upper die mounting seat;

[0040] A gear rack transmission structure, the gear rack transmission structure comprises a gear and a rack meshing with each other, the rack extending up and down, one of the gear and the rack being arranged on the connecting seat, and the other being arranged on the upper die mounting seat; and,

[0041] The guide structure comprises a slide rail and a slider which slide in cooperation with each other, wherein one of the slide rail and the slider is arranged on the connecting seat, and the other is arranged on the upper die mounting seat.

[0042] Optionally, the pressure plate structure comprises:

[0043] A pressing plate is arranged on the upper die seat, the lower end surface of the pressing plate is used to close the notches of the plurality of positioning grooves downwards, and the lower end surface of the pressing plate is provided with a fifth mounting hole; and,

[0044] The clamping member is movably installed in the fifth installation hole along the up-down direction, and is used to fix the welding mesh downward to the upper end of the lower mold base when the upper mold base is separated from the lower mold base.

[0045] Optionally, the fifth mounting hole includes a first hole section and a second hole section arranged in a stepped manner in the up-down direction, and the hole diameter of the first hole section is smaller than the hole diameter of the second hole section to form a first step surface arranged downward;

[0046] The pressing member comprises:

[0047] A first connecting rod, the upper end of which passes through the first hole section and is fixedly mounted on the pressing plate;

[0048] A gland, movably mounted on the lower end of the first connecting rod in an up-down direction; and

[0049] A compression spring is arranged in the second hole section and is located between the pressure cover and the first step surface.

[0050] Optionally, the pressing plate structure includes a pressing plate, and the pressing plate is movably and adjustably mounted on the upper mold base in the up-and-down directions.

[0051] Optionally, the pressing plate is provided with a sixth mounting hole, and the sixth mounting hole comprises a third hole section and a fourth hole section arranged in a stepped manner in the up-down direction, and the hole diameter of the third hole section is smaller than the hole diameter of the fourth hole section to form a second step surface arranged downward;

[0052] The elastic connection structure between the pressing plate and the upper die seat comprises:

[0053] a second connecting rod, wherein the upper end of the second connecting rod passes through the sixth mounting hole and is fixedly mounted on the upper die seat, and a limiting boss is provided on the outer side of the lower end of the second connecting rod, and the limiting boss is used to allow the pressing plate to be hung on the lower end of the second connecting rod; and

[0054] An adjusting spring is arranged between the pressing plate and the upper die seat.

[0055] Optionally, the edge of the pressing plate structure is set inwardly relative to the upper mold base, so as to form a first cutting space on the peripheral side of the pressing plate structure;

[0056] The cutting device comprises:

[0057] A fixed seat, arranged on the upper die seat;

[0058] A cutting structure, comprising a first cutting structure movably mounted on the fixing seat and arranged corresponding to the first cutting space, wherein the first cutting structure has a cutting end and a connecting end opposite to each other; and

[0059] A cutting drive device is arranged on the upper die base, and the cutting drive device is drivingly connected to the connecting end;

[0060] Wherein, the cutting end is driven by the cutting driving device to protrude downward from the pressing plate structure, so as to extend into the first cutting space to cut the welding strip.

[0061] Optionally, the first cutting structure comprises a plurality of cutting knives, two ends of each cutting knives respectively form the cutting end and the connecting end, and the middle position of each cutting knives is hingedly mounted on the fixing seat;

[0062] The cutting device further comprises a synchronous connection block, and the connection ends of each of the cutting blades are rotatably connected to the synchronous connection block;

[0063] The cutting drive device drives the synchronous connecting block to move linearly.

[0064] Optionally, a third mounting groove is formed at the upper end of the synchronous connecting block, and the connecting end can be detachably mounted in the third mounting groove.

[0065] Optionally, the pressing plate structure includes a plurality of pressing plates distributed along the front-rear direction, and a second cutting space is formed between two adjacent pressing plates;

[0066] The cutting structure further includes a second cutting structure movably mounted on the fixing seat and arranged corresponding to the second cutting space.

[0067] The present invention further provides a solar cell welding machine, the solar cell welding machine comprising a welding mesh forming mold, the welding mesh forming mold comprising:

[0068] Lower die seat;

[0069] An upper die base is movably mounted on the lower die base in the up-down direction, and a pressing plate structure is provided at the lower end of the upper die base;

[0070] A positioning device is provided at the upper end of the lower die base, and the positioning device is formed with a plurality of positioning grooves staggered in the left-right and front-back directions, and any two of the positioning grooves intersect with each other to form an intersecting groove section, and a first mounting hole is penetrated through the bottom wall of each of the intersecting groove sections;

[0071] A welding device, comprising a welding column movably mounted on each of the first mounting holes in an up-down direction, wherein a heating device is connected to the lower end of the welding column; and

[0072] A cutting device, arranged on the upper die seat;

[0073] Wherein, each of the positioning grooves is correspondingly penetrated with a welding strip, the upper mold seat moves downward, the pressure plate structure downwardly closes the notches of the plurality of positioning grooves, and the welding column moves upward to press against the intersection of the two welding strips, so that the two welding strips are heated and welded to be connected;

[0074] The cutting device cuts a plurality of welding strips so that the plurality of welding strip segments located in the positioning device form a welding mesh.

[0075] In the technical solution of the present invention, the upper mold base is movably installed on the lower mold base along the up and down direction, and the lower end of the upper mold base is provided with a pressure plate structure, and the positioning device is arranged at the upper end of the lower mold base, and the positioning device is formed with a plurality of positioning grooves staggered along the left and right and front and back directions, and any two of the positioning grooves intersect with each other to form an intersecting groove section, and the bottom wall of each of the intersecting groove sections is penetrated with a first mounting hole, and the welding device includes a welding column movably installed on each of the first mounting holes along the up and down direction, and the lower end of the welding column is connected with a heating device, and the cutting device is arranged on the upper mold base. In this way, after the welding strip is positioned in each of the positioning grooves by the positioning device, the upper mold base moves downward so that the pressure plate structure downwardly closes the notches of the plurality of positioning grooves, and then the welding column moves upward to press against the intersection of the two welding strips, so that the two welding strips are heated and welded to be connected, and after welding is completed, the plurality of welding strips are cut by the cutting device so that the plurality of welding strip segments located in the positioning device form a welding network. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0077] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a welding mesh forming mold provided by the present invention;

[0078] Figure 2 for Figure 1 A schematic diagram of a three-dimensional structure at an angle of an embodiment of a lower die base;

[0079] Figure 3 for Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of a lower die base in another angle;

[0080] Figure 4 for Figure 1 A schematic diagram of the top view of the lower die base;

[0081] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0082] Figure 6 for Figure 5 A schematic diagram of the local enlarged structure at E in the middle;

[0083] Figure 7 for Figure 4 A schematic diagram of the cross-sectional structure along the BB direction;

[0084] Figure 8 for Figure 7 A schematic diagram of the local enlarged structure at F in the middle;

[0085] Fig. 9 for Figure 1 A schematic diagram of the structure of the lower die base viewed from above;

[0086] Fig.10 for Figure 1 A schematic diagram of the three-dimensional structure of the positioning device (local structure);

[0087] Fig.11 for Fig.10 A schematic diagram of the local enlarged structure at G in the middle;

[0088] Fig.12 for Figure 1 A schematic diagram of the three-dimensional structure of the upper die base;

[0089] Fig.13 for Figure 1 A schematic diagram of the structure of the upper die base viewed from above;

[0090] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure along the CC direction;

[0091] Fig.15 for Fig.13 Schematic diagram of the cross-sectional structure along the DD direction;

[0092] Fig.16 for Fig.14Schematic diagram of the local enlarged structure at H in the middle;

[0093] Fig.17 for Fig.15 A schematic diagram of the local enlarged structure at position I in the middle;

[0094] Fig.18 for Figure 1 A schematic diagram of the three-dimensional structure of the upper die base (assembly); Fig.19 for Figure 1 Schematic diagram of the top view of the upper die seat (assembly) Fig. 20 for Figure 1 Schematic diagram of the three-dimensional structure of the cutting device.

[0095] Description of Figure Numbers:

[0096]

[0097]

[0098] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0099] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0100] It should be noted that if a directional indication is involved in the embodiment of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0101] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0102] The crystalline silicon solar cells currently used in the market use multiple main grids that are electrically connected through welding ribbons. The current on the solar cell is collected by fine grid lines to the main grid lines, and then flows out through the welding ribbons on the main grid lines. However, the width of the fine grid is restricted by the screen printing process, and the main grid cannot be too thin because it also has the responsibility of connecting the welding ribbons. A too thin main grid will cause welding difficulties and cannot guarantee welding tension.

[0103] In view of this, the present invention provides a solar cell welding machine, the solar cell welding machine includes a welding mesh forming mold, and any solar cell welding machine including the welding mesh forming mold is within the protection scope of the present invention, wherein: Figures 1 to 20 This is a structural schematic diagram of an embodiment of a welding mesh forming mold provided by the present invention.

[0104] See also Figure 1 The welding mesh forming mold 100 includes a lower die base 1, an upper die base 2, a positioning device 3, a welding device 4 and a cutting device 5. The upper die base 2 is movably installed on the lower die base 1 along the up-down direction. The lower end of the upper die base 2 is provided with a pressing plate structure 6. The positioning device 3 is provided at the upper end of the lower die base 1. A plurality of positioning grooves 31 staggered along the left-right and front-back directions are formed on the positioning device 3. Any two of the positioning grooves 31 intersect with each other to form an intersecting groove section. The bottom wall of each intersecting groove section is penetrated with a first mounting hole. The welding device 4 includes a plurality of positioning grooves 31 staggered along the left-right and front-back directions. A welding column 41 is movably mounted on each of the first mounting holes, and a heating device 42 is connected to the lower end of the welding column 41. The cutting device 5 is arranged on the upper mold base 2, wherein each of the positioning grooves 31 is respectively penetrated with a welding strip. The upper mold base 2 moves downward, and the pressure plate structure 6 closes the notches of the multiple positioning grooves 31 downward. The welding column 41 moves upward to press against the intersection of two welding strips so that the two welding strips are heated and welded to be connected. The cutting device 5 cuts multiple welding strips so that the multiple welding strip segments located in the positioning device 3 form a welding mesh.

[0105] In the technical solution of the present invention, the upper die base 2 is movably mounted on the lower die base 1 along the up-down direction, a pressure plate structure 6 is provided at the lower end of the upper die base 2, the positioning device 3 is provided at the upper end of the lower die base 1, and a plurality of positioning grooves 31 staggered along the left-right and front-back directions are formed on the positioning device 3, any two of the positioning grooves 31 intersect with each other to form an intersecting groove section, and a first mounting hole is penetrated through the bottom wall of each of the intersecting groove sections, and the welding device 4 includes a welding column 41 movably mounted on each of the first mounting holes along the up-down direction, and the welding column 41 has a A heating device 42 is connected to the lower end, and the cutting device 5 is arranged on the upper mold base 2. In this arrangement, after the welding strip is positioned in each of the positioning grooves 31 by the positioning device 3, the upper mold base 2 moves downward to allow the pressure plate structure 6 to close the notches of the multiple positioning grooves 31 downward, and then the welding column 41 moves upward to press against the intersection of the two welding strips so that the two welding strips are heated and welded to be connected. After welding is completed, the multiple welding strips are cut by the cutting device 5 so that the multiple welding strip segments located in the positioning device 3 form a welding network.

[0106] For further information, see Figure 4 The positioning device 3 includes a positioning plate 32, a guide plate 33 and a guide drive device 35. The upper end surface of the positioning plate 32 is provided with the plurality of positioning grooves 31. The guide plate 33 is movably installed on the lower mold base 1 along the up and down directions and is located on one side of the positioning plate 32. A plurality of guide channels are formed on the upper end of the guide plate 33. The plurality of guide channels are respectively arranged corresponding to the plurality of positioning grooves 31. The plurality of guide channels are used to limit and guide the welding strips from the guide channels to pass through the positioning grooves 31 correspondingly. The guide drive device 35 is arranged on the lower mold base 1 to drive the guide plate 33 to move. In this way, the guide channel on the guide plate 33 is guided to quickly position the welding strip in the positioning groove 31. After the positioning of the welding strip is completed, the guide plate 33 is driven to move by the guide drive device 35 to fix the positioned welding strip to prevent the positioned welding strip from moving and affecting subsequent welding.

[0107] For further information, see Fig.10 and Fig.11 A first mounting groove 331 is formed at the upper end of the guide plate 33, and a positioning sleeve 34 is provided in the first mounting groove 331. The inner cavity of the positioning sleeve 34 forms the guide channel. In this way, the positioning sleeve 34 ensures that the welding strip is positioned in the corresponding positioning groove 31, which is conducive to quickly positioning the welding strip. At the same time, the first mounting groove 331 is used to avoid affecting the downward closure of the multiple positioning grooves 31 by the pressure plate structure 6.

[0108] The heating method of the heating device 42 can be implemented in various forms, such as electric heating, steam heating, etc., which are not limited in the present application. Specifically, in this embodiment, please refer to Figure 2 and Figure 3 The heating device 42 includes an oil heating component 421 and a heating drive device 422. The oil heating component 421 is movably installed on the lower mold base 1 in the up and down directions. The heating drive device 422 is arranged on the lower mold base 1 to drive the oil heating component 421 to move. The lower end of the welding column 41 is arranged at the upper end of the oil heating component 421. With such an arrangement, after the welding column 41 is heated by the oil heating component 421, the oil heating component 421 is driven to move by the heating drive device 422, so that the heated welding column 41 welds the welding strip upward.

[0109] It should be noted that the maximum temperature of oil heating can usually reach 400° C. In order to ensure the quality of welding, the welding strip should preferably be made of copper alloy or tinned copper wire.

[0110] It should be noted that the heating drive device 422 can be one of a pneumatic cylinder, an oil cylinder or an electric push rod. Furthermore, in order to prevent the heating drive device 422 from being damaged due to excessive movement speed, a hydraulic buffer is provided on the lower mold base 1 to limit the movement speed of the heating drive device 422. At the same time, in order to ensure that the oil heating component 421 moves stably in the up and down directions, a guide structure 24 is provided on the lower mold base 1 to ensure that the oil heating component 421 moves along a predetermined route, thereby improving the stability of the heating device 42.

[0111] Furthermore, the oil heating component 421 includes a heating shell 4211 and a connecting pipe 4212, the heating shell 4211 is formed with an oil storage chamber, the connecting pipe 4212 includes a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe and the liquid outlet pipe are both connected to the oil storage chamber, wherein the lower end of the welding column 41 is installed to the upper end of the heating shell 4211. In this arrangement, the heated hot oil is introduced into the oil storage chamber through the connecting pipe 4212 to heat the welding column 41 connected to the heating shell 4211.

[0112] It should be noted that there are many implementations of the structure of the heating shell 4211, which are not limited in the present application. For example, the heating may be performed by storing hot oil in the oil storage chamber, or by flowing hot oil in a flow channel formed in the heating shell 4211 for heating.

[0113] For further information, see Figures 5 to 8The welding column 41 is arranged in steps, including a first welding column section 411, a second welding column section 412 and a third welding column section 413 which are distributed from bottom to top and whose outer diameters are gradually reduced. The oil heating component 421 also includes a heat conducting plate 4213, a synchronous holding block 4214, a plurality of preload springs 4215, a first limiting plate 4216 and a second limiting plate 4217. The heat conducting plate 4213 is attached to the heating shell 4211 and is arranged on the upper end surface of the heat conducting plate 4213. The upper end surface of the heat conducting plate 4213 is provided with a second mounting groove 42131. The bottom wall of the second mounting groove 42131 is provided with a plurality of accommodating grooves 42132. The synchronous holding block 4214 is arranged in the second mounting groove 42131. Each The synchronization holding block 4214 is penetrated with a plurality of second mounting holes, the lower end of each of the preload springs 4215 is correspondingly arranged in each of the accommodating grooves 42132, the first limiting plate 4216 is penetrated with a plurality of third mounting holes, the limiting plate is arranged on the upper end surface of the heat conducting plate 4213 to close the notch of the second mounting groove 42131, the second limiting plate 4217 is installed to the lower die base 1, and is located above the first limiting plate 4216, the second limiting plate 4217 is penetrated with a plurality of fourth mounting holes, wherein the positioning plate 32 is arranged on the upper end surface of the second limiting plate 4217, the lower end of each of the first welding column 41 section 411 is correspondingly pressed against the upper end of the preload spring 4215, and each of the second The welding column 41 segment 412 is correspondingly penetrated in the second mounting hole and the third mounting hole, and each of the third welding column segments 413 is correspondingly penetrated in the fourth mounting hole and is arranged in the first mounting hole. In this arrangement, the heat of the heating shell 4211 is transferred upward to the welding column 41 through the heat conducting plate 4213, and the plurality of welding columns 41 are installed in the second mounting groove 42131 through the synchronization holding block 4214, which is beneficial to the installation of the welding column 41 and to keeping the plurality of welding columns 41 synchronized. The synchronization holding block 4214 is fixed to the second mounting groove 42131 through the first limiting plate 4216 to prevent the synchronization holding block 4214 from being carried upward out of the welding column 41 The second mounting groove 42131 adjusts the height of the welding column 41 through the pre-tightening spring 4215 to prevent the welding column 41 from failing to contact the welding strip due to inconsistent height, thereby affecting the welding quality. The aperture of the second mounting hole is smaller than the outer diameter of the first welding column segment 411 to limit the upward movement of the first welding column segment 411 to prevent the welding column 41 from popping up. Furthermore, the heat conducting plate 4213, the synchronization maintaining block 4214 and the first limiting plate 4216 move upward relative to the second limiting plate 4217 under the drive of the heating shell 4211, and the aperture of the first mounting hole is smaller than the outer diameter of the second welding column segment 412 to limit the upward movement of the second welding column segment 412.

[0114] Since too high a temperature may affect the operation of the drive device and other equipment, in order to prevent the temperature of the oil heating component 421 from being too high, please refer to Figure 7 The oil heating component 421 also includes a cooling fan 4218 arranged on the lower mold base 1, and the cooling fan 4218 is located below the heating shell 4211. In this arrangement, the heating shell 4211 is cooled by the cooling fan 4218, thereby preventing the oil temperature of the oil heating component 421 from being too high. Furthermore, in order to quickly reduce the temperature of the oil heating component 421, a plurality of cooling fans 4218 are provided.

[0115] It should be noted that in order to prevent excessive temperature from affecting the operation of other equipment and to prevent personnel from accidentally touching the oil heating component 421 and causing burns and other safety accidents, the lower mold base 1 is provided with a heat insulation board to isolate the oil heating component 421.

[0116] To measure the temperature of the heating housing 4211, refer to Fig. 9 The oil heating component 421 also includes a thermocouple 4219 arranged on the lower mold base 1, and the thermocouple 4219 is connected to the heating shell 4211. With such a configuration, the temperature of the heating shell 4211 is obtained through the thermocouple 4219, so as to determine whether the oil heating component 421 reaches the temperature required for welding, which is beneficial to ensure the welding quality of the welding device 4. At the same time, the thermocouple is used to determine whether the temperature of the oil heating component 421 is too high, which is beneficial to control the temperature of the oil heating component 421. Furthermore, in order to ensure the accuracy of the measurement result, a plurality of thermocouples 4219 are arranged, and the plurality of thermocouples 4219 are correspondingly connected to different positions of the heating shell 4211.

[0117] See also Fig.18 and Fig.19The welding mesh forming mold 100 also includes a connecting seat 21, an upper mold mounting seat 22, a gear rack transmission structure 23 and a guide structure 24, the connecting seat 21 is fixedly installed to the lower mold base 1, the upper mold mounting seat 22, and the upper mold base 2 is arranged on the upper mold mounting seat 22, the gear rack transmission structure 23 includes mutually meshing gears and racks, and the rack extends up and down, one of the gears and racks is arranged on the connecting seat 21, and the other is arranged on the upper mold mounting seat 22, the guide structure 24 includes a slide rail and a slider that slide with each other, one of the slide rail and the slider is arranged on the connecting seat 21, and the other is arranged on the upper mold mounting seat 22, so that the gear rack transmission structure 23 drives the upper mold mounting seat 22 to move up and down, so as to drive the upper mold base 2 to move up and down, and at the same time, the guide structure 24 is used to ensure that the upper mold base 2 moves accurately along a predetermined route, thereby improving the stability of the movement of the upper mold base 2.

[0118] It should be noted that the guide structure 24 has multiple implementations, for example, it can be a slide rail and a slider that slide in cooperation with each other, or it can be a guide rod and a guide sleeve that slide in cooperation with each other, etc., and this is not limited in the present application.

[0119] See also Fig.15 The pressing plate structure 6 includes a pressing plate 61 and a clamping member 62. The pressing plate 61 is arranged on the upper mold base 2. The lower end surface of the pressing plate 61 is used to downwardly close the notches of the multiple positioning grooves 31. The lower end surface of the pressing plate 61 is provided with a fifth mounting hole 611. The clamping member 62 is movably installed in the fifth mounting hole 611 along the up and down direction, and is used to fix the welding mesh downward to the upper end of the lower mold base 1 when the upper mold base 2 is separated from the lower mold base 1. With this arrangement, when the upper mold base 2 rises, the clamping member 62 extends out of the fifth mounting hole 611 to fix the welding mesh to the upper end of the lower mold base 1, thereby preventing the welding mesh from adhering to the pressing plate structure 6, thereby facilitating the subsequent movement of the welding mesh.

[0120] It should be noted that the upper die base 2 is provided with a cooling pipe, and the pipe outlet of the cooling pipe is provided on the pressure plate 61 and faces the lower die base 1, which is used to ventilate the welding mesh downward, thereby quickly reducing the temperature of the welding mesh and preventing the welding mesh from adhering to the welding mesh moving device, which is beneficial to the movement of the welding mesh.

[0121] The pressing member 62 can have various implementations, which are not limited in the present application. For example, it can be an elastic member, or it can be as in the present embodiment. Fig.17The fifth mounting hole 611 includes a first hole section 6111 and a second hole section 6112 which are arranged in a stepped manner along the up-down direction. The aperture of the first hole section 6111 is smaller than the aperture of the second hole section 6112 to form a first stepped surface arranged downward. The pressing member 62 includes a first connecting rod 621, a pressure cover 622 and a pressure spring 623. The upper end of the first connecting rod 621 passes through the first hole section 6111 and is fixedly installed on the pressing plate 61. The pressure cover 622 is movably installed on the lower end of the first connecting rod 621 along the up-down direction. The pressure spring 623 is arranged in the second hole section 6112 and is located between the pressure cover 622 and the first stepped surface. With such an arrangement, when the upper die base 2 contacts the lower die base 1, the pressure spring 623 is compressed. When the upper die base 2 is separated from the lower die base 1, the pressure spring 623 stretches, so that the pressure cover 622 moves downward to fix the welding mesh to the lower die base.

[0122] See also Fig.13 and Fig.14 The pressure plate structure 6 includes a pressure plate 61, which is movably and adjustably installed on the upper mold base 2 in the up and down directions. Such a configuration allows the pressure plate 61 to adapt to the uneven upper end surface of the lower mold base 1 to ensure that the pressure plate 61 presses the welding strip downward to facilitate the welding of the welding column 41.

[0123] For further information, see Fig.16 The pressing plate 61 is provided with a sixth mounting hole 612, and the sixth mounting hole 612 includes a third hole section 6121 and a fourth hole section 6122 arranged in a stepped manner in the up-down direction, the aperture of the third hole section 6121 is smaller than the aperture of the fourth hole section 6122 to form a second stepped surface arranged downward, the elastic connection structure 63 between the pressing plate 61 and the upper die seat 2, the elastic connection structure 63 includes a second connecting rod 631 and an adjusting spring 632, the upper end of the second connecting rod 631 passes through the sixth mounting hole 612 and is fixedly installed on the upper die seat 2 Die base 2, a limiting boss is provided on the outer side of the lower end of the second connecting rod 631, and the limiting boss is used to make the pressure plate 61 hang on the lower end of the second connecting rod 631, and the adjustment spring 632 is arranged between the pressure plate 61 and the upper die base 2. In this way, the pressure plate 61 is installed on the lower end of the second connecting rod 631 along the up and down movement, and the up and down movement of the pressure plate 61 is controlled by the adjustment spring 632. Under the premise of ensuring that the pressure plate 61 presses the welding mesh tightly, it can adapt to the uneven situation of the lower die base 1, thereby facilitating the welding of the welding column 41.

[0124] See also Fig. 20, the edge of the pressing plate structure 6 is retracted relative to the upper mold base 2 to form a first cutting space on the peripheral side of the pressing plate structure 6, the cutting device 5 includes a fixed seat 51, a cutting structure and a cutting drive device 54, the fixed seat 51 is arranged on the upper mold base 2, the cutting structure includes a first cutting structure 52 movably mounted on the fixed seat 51 and arranged corresponding to the first cutting space, the first cutting structure 52 has relative cutting ends 5211 and connecting ends 5212, the cutting drive device 54 is arranged on the upper mold base 2, the cutting drive device 54 is drivingly connected to the connecting end 5212, wherein the cutting end 5211 protrudes downward from the pressing plate structure 6 under the drive of the cutting drive device 54, so as to extend into the first cutting space to cut the welding strip, and in this way, the cutting drive device 54 drives the cutting structure to move, so that the cutting end 5211 protrudes downward from the pressing plate structure 6, and extends into the first cutting space to cut the welding strip.

[0125] It should be noted that the cutting method of the cutting device 5 can be implemented in a variety of ways, such as rotational cutting, linear motion cutting of the welding strip, etc., which is not limited in the present application.

[0126] Furthermore, the cutting structure can have multiple implementations, for example, one cutting knife 521 can cut multiple welding strips at the same time, or one cutting knife 521 can cut one welding strip, etc., and this is not limited in the present application. Specifically, in the present embodiment, the first cutting structure 52 includes multiple cutting knives 521, and the two ends of each cutting knife 521 respectively form the cutting end 5211 and the connecting end 5212, and the middle position of each cutting knife 521 is hingedly mounted on the fixed seat 51. The cutting device 5 also includes a synchronous connecting block 53, and the connecting end 5212 of each cutting knife 521 is rotatably connected to the synchronous connecting block 53. The cutting drive device 54 drives the synchronous connecting block 53 to move linearly. In this way, the multiple cutting knives 521 are connected together through the synchronous connecting block 53, and the cutting drive device 54 drives the synchronous connecting block 53 to move, so that the first cutting structure 52 can cut multiple welding strips at the same time.

[0127] Furthermore, a third mounting groove 531 is formed at the upper end of the synchronous connection block 53, and the connection end 5212 can be detachably mounted on the third mounting groove 531. With such a configuration, it is convenient to install the cutting knife 521 on the synchronous connection block 53 through the third mounting groove 531. At the same time, a detachable connection method is adopted to facilitate quick loading and unloading of the cutting knife 521, thereby facilitating replacement of the cutting knife 521.

[0128] Taking into account that a welding mesh that is too large may be easily damaged during movement, in one embodiment, the pressure plate structure 6 includes a plurality of pressure plates 61 distributed along the front-to-back direction, and a second cutting space is formed between two adjacent pressure plates 61. The cutting structure also includes a second cutting structure 55 movably mounted on the fixed seat 51 and arranged corresponding to the second cutting space. In this way, a welding mesh is divided into a plurality of smaller welding meshes by the second cutting structure 55, thereby reducing the probability of damage to the welding mesh during movement, thereby facilitating the movement of the welding mesh.

[0129] It should be noted that the first cutting structure 52 and the second cutting structure 55 both adopt the same structure, which is convenient for mutual replacement and unified purchase, thereby reducing costs.

[0130] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A welding mesh forming mold for a solar cell welding machine, characterized in that: The welding mesh forming mold comprises: Lower die seat; An upper die base is movably mounted on the lower die base in the up-down direction, and a pressing plate structure is provided at the lower end of the upper die base; A positioning device is arranged at the upper end of the lower mold base, and a plurality of positioning grooves are formed on the positioning device, which are staggered along the left and right and front and back directions, and any two of the positioning grooves intersect with each other to form an intersecting groove section, and the bottom wall of each of the intersecting groove sections is penetrated with a first mounting hole. The positioning device comprises a positioning plate, a guide plate and a guide driving device, the upper end surface of the positioning plate is provided with the plurality of positioning grooves, the guide plate is movably installed on the lower mold base along the up and down directions, and is located on one side of the positioning plate, a plurality of guide channels are formed on the upper end of the guide plate, the plurality of guide channels are respectively arranged corresponding to the plurality of positioning grooves, and the plurality of guide channels are used to limit and guide the welding strips from the guide channels to pass through the positioning grooves correspondingly, a first mounting groove is formed on the upper end of the guide plate, a positioning sleeve is arranged in the first mounting groove, and the inner cavity of the positioning sleeve forms the guide channel, and the guide driving device is arranged on the lower mold base to drive the guide plate to move; A welding device, comprising a welding column movably mounted on each of the first mounting holes in an up-down direction, wherein the welding column is arranged in steps, including a first welding column section, a second welding column section and a third welding column section which are arranged from bottom to top and whose outer diameters gradually decrease; The heating device comprises an oil heating component and a heating driving device, the oil heating component is movably installed on the lower mold base in the up-down direction, and the lower end of the welding column is arranged at the upper end of the oil heating component, the oil heating component comprises a heating shell, a connecting pipeline, a heat conducting plate, a synchronous holding block, a plurality of pre-tightening springs, a first limit plate and a second limit plate, the heating shell forms an oil storage cavity, the lower end of the welding column is installed to the upper end of the heating shell, the connecting pipeline comprises an inlet pipe and an outlet pipe, the inlet pipe and the outlet pipe are both connected to the oil storage cavity, the heat conducting plate is attached to the heating shell and is arranged on the upper end surface of the heating shell, the upper end surface of the heat conducting plate is provided with a second mounting groove, the bottom of the second mounting groove is provided with a plurality of accommodating grooves, the synchronous holding block is arranged in the second mounting groove, and each of the synchronous holding blocks is arranged in the second mounting groove. The holding block is penetrated with a plurality of second mounting holes, the lower ends of the plurality of pre-tightening springs are respectively correspondingly arranged in the respective accommodating grooves, the first limiting plate is penetrated with a plurality of third mounting holes, the first limiting plate is arranged on the upper end surface of the heat conducting plate, so as to close the notch of the second mounting groove, the second limiting plate is installed to the lower die seat, and is located above the first limiting plate, the second limiting plate is penetrated with a plurality of fourth mounting holes, the positioning plate is arranged on the upper end surface of the second limiting plate, the lower end of each of the first welding column sections is correspondingly pressed against the upper end of the pre-tightening spring, each of the second welding column sections is correspondingly penetrated in the second mounting hole and the third mounting hole, each of the third welding column sections is correspondingly penetrated in the fourth mounting hole and arranged in the first mounting hole, the heating driving device is arranged on the lower die seat, so as to drive the oil heating assembly to move; and, A cutting device, arranged on the upper die seat; Wherein, each of the positioning grooves is correspondingly penetrated with a welding strip, the upper mold seat moves downward, the pressure plate structure downwardly closes the notches of the plurality of positioning grooves, and the welding column moves upward to press against the intersection of the two welding strips, so that the two welding strips are heated and welded to be connected; The cutting device cuts a plurality of welding strips so that the plurality of welding strip segments located in the positioning device form a welding mesh.

2. The welding mesh forming mold according to claim 1, characterized in that: The oil heating assembly further comprises a cooling fan disposed on the lower die base, and the cooling fan is located below the heating shell; and / or, The oil heating assembly also includes a thermocouple arranged on the lower die base, and the thermocouple is connected to the heating shell.

3. The welding mesh forming mold according to claim 1, characterized in that: The welding mesh forming mold also includes: A connecting seat, fixedly mounted to the lower die seat; An upper die mounting seat, wherein the upper die seat is arranged on the upper die mounting seat; A gear rack transmission structure, the gear rack transmission structure comprises a gear and a rack meshing with each other, the rack extending up and down, one of the gear and the rack being arranged on the connecting seat, and the other being arranged on the upper mold mounting seat; and, The guide structure comprises a slide rail and a slider which slide in cooperation with each other, wherein one of the slide rail and the slider is arranged on the connecting seat, and the other is arranged on the upper die mounting seat.

4. The welding mesh forming mold according to claim 1, characterized in that: The pressure plate structure comprises: A pressing plate is arranged on the upper die seat, the lower end surface of the pressing plate is used to close the notches of the plurality of positioning grooves downwards, and the lower end surface of the pressing plate is provided with a fifth mounting hole; and, The clamping member is movably installed in the fifth installation hole along the up-down direction, and is used to fix the welding mesh downward to the upper end of the lower mold base when the upper mold base is separated from the lower mold base.

5. The welding mesh forming mold according to claim 4, characterized in that: The fifth mounting hole comprises a first hole section and a second hole section which are arranged in a stepped manner in the up-down direction, wherein the hole diameter of the first hole section is smaller than the hole diameter of the second hole section to form a first stepped surface arranged downward; The pressing member comprises: A first connecting rod, the upper end of which passes through the first hole section and is fixedly mounted on the pressing plate; A gland, movably mounted on the lower end of the first connecting rod in an up-down direction; and A compression spring is arranged in the second hole section and is located between the pressure cover and the first step surface.

6. The welding mesh forming mold according to claim 1, characterized in that: The pressing plate structure comprises a pressing plate, and the pressing plate is movably and adjustably mounted on the upper die seat in the up-down direction.

7. The welding mesh forming mold according to claim 6, characterized in that: The pressing plate is provided with a sixth mounting hole, and the sixth mounting hole includes a third hole section and a fourth hole section arranged in a stepped manner in the up-down direction, and the hole diameter of the third hole section is smaller than the hole diameter of the fourth hole section to form a second step surface arranged downward; The elastic connection structure between the pressing plate and the upper die seat comprises: a second connecting rod, wherein the upper end of the second connecting rod passes through the sixth mounting hole and is fixedly mounted on the upper die seat, and a limiting boss is provided on the outer side of the lower end of the second connecting rod, and the limiting boss is used to allow the pressing plate to be hung on the lower end of the second connecting rod; and An adjusting spring is arranged between the pressing plate and the upper die seat.

8. The welding mesh forming mold according to claim 1, characterized in that: The edge of the pressing plate structure is set inwardly relative to the upper mold base to form a first cutting space on the peripheral side of the pressing plate structure; The cutting device comprises: A fixed seat, arranged on the upper die seat; A cutting structure, comprising a first cutting structure movably mounted on the fixing seat and arranged corresponding to the first cutting space, wherein the first cutting structure has a cutting end and a connecting end opposite to each other; and A cutting drive device is arranged on the upper die base, and the cutting drive device is drivingly connected to the connecting end; Wherein, the cutting end is driven by the cutting driving device to protrude downward from the pressing plate structure, so as to extend into the first cutting space to cut the welding strip.

9. The welding mesh forming mold according to claim 8, characterized in that: The first cutting structure comprises a plurality of cutting knives, two ends of each cutting knives respectively form the cutting end and the connecting end, and the middle part of each cutting knives is hingedly mounted on the fixing seat; The cutting device further comprises a synchronous connection block, and the connection end of each cutting knife is rotatably connected to the synchronous connection block; The cutting drive device drives the synchronous connecting block to move linearly.

10. The welding mesh forming mold according to claim 9, characterized in that: A third mounting groove is formed at the upper end of the synchronous connecting block, and the connecting end can be detachably mounted in the third mounting groove.

11. The welding mesh forming mold according to claim 8, characterized in that: The pressing plate structure includes a plurality of pressing plates distributed along the front-back direction, and a second cutting space is formed between two adjacent pressing plates; The cutting structure further includes a second cutting structure movably mounted on the fixing seat and arranged corresponding to the second cutting space.

12. A solar cell welding machine, characterized in that: It comprises the welding mesh forming mold as described in any one of claims 1 to 11.

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