Photovoltaic module welding device and photovoltaic equipment

Abstract

The utility model provides a photovoltaic module welding device and photovoltaic equipment, the photovoltaic module welding device comprises a welding mechanism, and the welding mechanism comprises a top plate, a first side plate, a second side plate and a crimping strip; the first side plate and the second side plate are arranged on the two opposite sides of the top plate in the first direction and connected with the top plate. The first side plate and the second side plate are respectively provided with a crimping surface; the crimping surfaces are positioned at one ends, deviating from the top plate, of the first side plate and the second side plate; the crimping strip extends along the first direction, one end of the crimping strip bypasses the crimping surface of the first side plate and is fixed on the first side plate, and the other end of the crimping strip bypasses the crimping surface of the second side plate and is fixed on the second side plate. According to the invention, the arrangement of a needle pressing mechanism in a traditional mode is canceled, and the welding strip is pressed and held in the welding process by adopting the crimping strip. Compared with a traditional pressing needle mechanism, the crimping strip is simple in structure, the mounting and fixing mode is simple and convenient, maintenance or replacement is convenient, and the maintenance cost can be controlled easily.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic module preparation, in particular to a photovoltaic module welding device and a photovoltaic device. BACKGROUND

[0002] An important component of a photovoltaic module is a cell piece. The cell pieces are connected in series by welding ribbons to form cell strings, and the cell strings are spliced by bus bars (conductive materials such as metal sheets) according to a certain arrangement to realize parallel connection of multiple cell strings. The process of splicing the cell strings by the bus bars is called bus welding.

[0003] In the traditional way, a set of needle pressing mechanism is configured to press the welding ribbons onto the bus bars during the bus welding process to avoid virtual welding. However, the structure of the set of mechanism is relatively complex, and regular maintenance is required. The maintenance process is relatively cumbersome and has a long cycle, which affects the welding efficiency of the cell pieces. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the present application provides a photovoltaic module welding device and a photovoltaic device to at least solve the problems of complex structure and high maintenance cost of the existing photovoltaic module welding device.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] The present application provides a photovoltaic module welding device, which comprises a welding mechanism, and the welding mechanism comprises: a top plate, a first side plate, a second side plate and a pressure contact strip; the first side plate and the second side plate are arranged on opposite sides of the top plate along a first direction and are connected with the top plate; the first side plate and the second side plate each have a pressure contact surface, and the pressure contact surface is located at an end of the first side plate and the second side plate away from the top plate; the pressure contact strip extends along the first direction, one end of the pressure contact strip passes around the pressure contact surface of the first side plate and is fixed on the first side plate, and the other end of the pressure contact strip passes around the pressure contact surface of the second side plate and is fixed on the second side plate.

[0007] Optionally, a strip-shaped groove is arranged on the pressure contact surface, the strip-shaped groove extends along the first direction, and part of the pressure contact strip is embedded in the strip-shaped groove.

[0008] Optionally, the number of strip-shaped grooves is a plurality, the plurality of strip-shaped grooves are arranged at intervals, and the number of pressure contact strips is a plurality, and the plurality of pressure contact strips are embedded in the plurality of strip-shaped grooves one by one.

[0009] Optionally, the welding mechanism further comprises a tensioning wheel; the tensioning wheel is arranged on a side of the first side plate away from the second side plate, and one end of the pressure contact strip is fixed on the tensioning wheel.

[0010] Optionally, the welding mechanism comprises a guide wheel; the guide wheel is arranged on a side of the first side plate away from the second side plate, and one end of the pressure contact strip passes around the guide wheel and is fixed on the tensioning wheel.

[0011] Optionally, the welding mechanism further comprises a buckling plate, the buckling plate is connected to the second side plate in buckling manner on the side away from the first side plate, so as to fix the other end of the crimping strip on the second side plate.

[0012] Optionally, the welding mechanism further comprises a temperature measuring strip and a temperature sensor, the temperature measuring strip is arranged on the side close to the crimping surface and extends along the first direction, one end of the temperature measuring strip is fixed on the first side plate, the other end of the temperature measuring strip is fixed on the second side plate, and the contact of the temperature sensor is connected with the temperature measuring strip.

[0013] Optionally, the first side plate and the second side plate are respectively provided with through holes, the through holes have a spacing along the second direction with the crimping surface, wherein the second direction intersects the first direction; the two ends of the temperature measuring strip respectively pass through the corresponding through holes and are connected with the first side plate and the second side plate.

[0014] Optionally, the end of the first side plate away from the top plate is provided with a protruding part, and the crimping surface is arranged on the protruding part; and / or, the end of the second side plate away from the top plate is provided with a protruding part, and the crimping surface is arranged on the protruding part.

[0015] Optionally, the welding mechanism further comprises a heating assembly, the heating assembly is arranged between the top plate and the crimping strip, and the heating assembly is connected with the top plate, or the heating assembly is connected with the first side plate and the second side plate.

[0016] Optionally, the heating assembly comprises a heating pipe and a reflecting plate, the reflecting plate is connected with the top plate, and the heating pipe is arranged on the side away from the top plate and connected with the reflecting plate.

[0017] Optionally, the spacing between the reflecting plate and the heating pipe is smaller than the spacing between the reflecting plate and the top plate.

[0018] Optionally, the welding mechanism further comprises a fan, the fan is installed on the top plate, the air outlet of the fan is arranged towards the reflecting plate, and a plurality of hollow holes are arranged on the reflecting plate.

[0019] Optionally, the welding mechanism further comprises two third side plates, the two third side plates extend along the first direction and are connected with the top plate, the first side plate and the second side plate respectively, a rectangular cavity is formed between the two third side plates, the top plate, the first side plate and the second side plate, and the heating assembly is arranged in the cavity.

[0020] Optionally, a driving mechanism is further included, the driving mechanism is connected with the top plate, and the driving mechanism is used for driving the welding mechanism to move along the second direction through the top plate, wherein the second direction intersects the first direction.

[0021] The application also provides a photovoltaic device, comprising a cell piece support and the photovoltaic module welding device according to any one of the preceding.

[0022] Compared with the prior art, the photovoltaic module welding device and the photovoltaic device have the following advantages:

[0023] The photovoltaic module welding device cancels the setting of the pressing needle mechanism in the conventional mode, and adopts the pressure contact strip, which can hold the welding strip during the welding process, so that the welding strip and the bus bar are in full contact, thereby realizing the welding of the welding strip and the bus bar. Compared with the conventional pressing needle mechanism, the pressure contact strip of the application has a simple structure. One end of the pressure contact strip is wound around the pressure contact surface of the first side plate and fixed on the first side plate, and the other end is wound around the pressure contact surface of the second side plate and fixed on the second side plate, so that the installation and fixation of the pressure contact strip can be completed. The installation and fixation method is simple and convenient. At the same time, the pressure contact strip is fixed by two ends, which ensures that the pressure contact surfaces on the first side plate and the second side plate are at the same height, so that the pressure contact strip is adjusted to be in a horizontal state, so that the pressure contact strip and the welding strip are in full contact, and the pressure holding effect is achieved. When maintenance or replacement of the pressure contact strip is required, the pressure contact strip can be detached from the first side plate and the second side plate, thereby greatly facilitating the maintenance or replacement of the pressure contact strip, and helping to control the maintenance cost.

[0024] The photovoltaic device has the same or similar advantages as the photovoltaic module welding device described above, and will not be described here. BRIEF DESCRIPTION OF DRAWINGS

[0025] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0026] Figure 1 is a front view of a photovoltaic module welding device in an embodiment of the present application;

[0027] Figure 2 is a side view of a photovoltaic module welding device in an embodiment of the present application;

[0028] Figure 3 is a schematic view of a first side plate in an embodiment of the present application;

[0029] Figure 4 is a schematic view of a second side plate in an embodiment of the present application;

[0030] Figure 5 is a schematic view of the side of the first side plate away from the second side plate in an embodiment of the present application;

[0031] Figure 6 is a schematic view of a reflecting plate in an embodiment of the present application;

[0032] Figure 7 is a schematic view of a photovoltaic device in an embodiment of the present application;

[0033] Figure 8 is a schematic view of a photovoltaic device without a welding mechanism in an embodiment of the present application;

[0034] Figure 9 is a schematic view of a cell placed on a cell support in an embodiment of the present application;

[0035] Figure 10 is a partial schematic view of a cell welding process in an embodiment of the present application.

[0036] Legend of reference signs:

[0037] 10 - top plate, 11 - first side plate, 12 - second side plate, 13 - third side plate, 14 - crimping surface, 141 - strip-shaped groove, 15 - through hole, 16 - protruding part, 17 - hanging plate, 121 - limiting groove;

[0038] 2 - crimping strip, 31 - tensioning wheel, 32 - guide wheel, 33 - buckling plate, 4 - temperature measuring strip, 51 - heating pipe, 52 - reflecting plate, 521 - hollow hole, 53 - connecting column, 6 - fan;

[0039] 71 - first mounting plate, 72 - second mounting plate, 73 - support frame;

[0040] 81 - cell support, 82 - cell string, 83 - welding ribbon, 84 - busbar. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0042] The terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of such terms is only meant to distinguish between objects for ease of description and not meant to limit the scope of the application. A first object covered or described by this application can be termed a second object, and similarly, a second object can also be termed a first object without departing from the scope of the application. Moreover, the objectives "and / or", as used herein is to be interpreted as inclusive, i.e., the inclusion of at least one of a number of objects, whether there are some objects not expressly included in the statement. In addition, the characters " / " and "and / or" as used herein are generally intended to present one of the associated objects as an "or" relationship.

[0043] The terms "comprise", "comprising", or any other variation thereof, as used in the specification and in claims of the present application, 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 can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0044] A photovoltaic module welding device and a photovoltaic device are provided in the present application.

[0045] A photovoltaic module welding device is provided in the present application, Figure 1 is a front view of a photovoltaic module welding device in the present application, Figure 2 is a side view of a photovoltaic module welding device in the present application, referring to Figure 1 and Figure 2 As shown, the photovoltaic module welding device comprises a welding mechanism, which comprises a top plate 10, a first side plate 11, a second side plate 12, and a pressure contact strip 2. The first side plate 11 and the second side plate 12 are arranged on opposite sides of the top plate 10 along a first direction and are connected to the top plate 10. The first side plate 11 and the second side plate 12 each have a pressure contact surface 14 located at an end thereof away from the top plate 10. The pressure contact strip 2 extends along the first direction, with one end of the pressure contact strip 2 passing around the pressure contact surface 14 of the first side plate 11 and being fixed to the first side plate 11, and the other end of the pressure contact strip 2 passing around the pressure contact surface 14 of the second side plate 12 and being fixed to the second side plate 12.

[0046] Specifically, the top plate 10 is arranged to extend along a first direction, the first direction being equivalent to the length direction of the top plate 10, the first side plate 11 and the second side plate 12 are arranged on opposite sides of the top plate 10 along the first direction and connected with the top plate 10, wherein the connection mode between the first side plate 11 and the second side plate 12 and the top plate 10 can adopt any mode such as fastener assembly connection, laser welding, limiting clamping, adhesive connection, etc., which can ensure the reliable connection of the first side plate 11 and the second side plate 12 with the top plate 10, and the present embodiment is not limited in this regard. The first side plate 11 and the second side plate 12 form a U-shaped structure with the top plate 10, the first side plate 11 and the second side plate 12 each have a pressure contact surface 14, Figure 3 is a schematic view of a first side plate 11 in the present embodiment, Figure 4 is a schematic view of a second side plate 12 in the present embodiment, referring to Figure 3 and Figure 4 , the pressure contact surface 14 is located at one end of the first side plate 11 and the second side plate 12 away from the top plate 10, and the pressure contact surface 14 is equivalent to the bottom surface of the first side plate 11 and the second side plate 12, which is suitable for contacting the welding strip during the welding process.

[0047] The pressure contact strip 2 has a long strip structure and is arranged to extend along the first direction. The pressure contact strip 2 is made of a refractory and high-temperature resistant material and is suitable for holding the welding strip during the welding process to enable the welding strip to fully contact the busbar, thereby facilitating the welding of the two and reducing the probability of false welding. In some embodiments, the pressure contact strip 2 can be made of tungsten, molybdenum alloy, etc., which has a high melting point and is not easy to deform or melt in a high-temperature environment, thereby effectively holding the welding strip. One end of the pressure contact strip 2 is wound around the pressure contact surface 14 of the first side plate 11 and fixed to the side of the first side plate 11 away from the second side plate 12, and the other end of the pressure contact strip 2 is wound around the pressure contact surface 14 of the second side plate 12 and fixed to the side of the second side plate 12 away from the first side plate 11, thereby achieving the installation and fixation of the pressure contact strip 2.

[0048] In the conventional manner, a set of pressure pin mechanisms is required to be configured to press the welding strip onto the busbar during the welding process of the welding strip and the busbar to avoid false welding. However, the pressure pin mechanism has a large number of pressure pins and a relatively complex structure, and the multiple pressure pins need to be regularly maintained to maintain the consistency of the pin surfaces and avoid false welding caused by the failure of some pressure pins to contact the welding strip. In addition, the pressure pins that are worn at the pin positions need to be regularly replaced to avoid slipping during the holding process, which affects the holding effect, thereby causing the maintenance process of the pressure pin mechanism to be tedious and long, which affects the welding efficiency of the photovoltaic module.

[0049] The photovoltaic module welding device of the embodiment of the present application cancels the setting of the pressure pin mechanism in the traditional mode, and adopts the pressure contact strip 2. The pressure contact strip 2 can hold the welding strip during the welding process, so that the welding strip and the bus bar are in full contact, thereby realizing the welding of the welding strip and the bus bar. Compared with the traditional pressure pin mechanism, the pressure contact strip 2 of the present application has a simple structure. One end of the pressure contact strip 2 is wound around the pressure contact surface 14 of the first side plate 11 and fixed to the first side plate 11, and the other end is wound around the pressure contact surface 14 of the second side plate 12 and fixed to the second side plate 12. The installation and fixation of the pressure contact strip 2 can be completed, and the installation and fixation method is simple and convenient. At the same time, the pressure contact strip 2 is fixed by both ends, which ensures that the pressure contact surfaces 14 on the first side plate 11 and the second side plate 12 are at the same height, i.e. the pressure contact strip 2 is adjusted to be in a horizontal state, so that the pressure contact strip 2 is in full contact with the welding strip, thereby effectively holding the welding strip. When it is necessary to maintain or replace the pressure contact strip 2, the pressure contact strip 2 can also be detached from the first side plate 11 and the second side plate 12, thereby greatly facilitating the maintenance or replacement of the pressure contact strip 2, and helping to control the maintenance cost.

[0050] Optionally, as shown in Figure 3 and Figure 4 In some embodiments of the present application, a strip-shaped groove 141 is arranged on the pressure contact surface 14, and the strip-shaped groove 141 extends along the first direction. Part of the pressure contact strip 2 is embedded in the strip-shaped groove 141. The strip-shaped groove 141 extends along the first direction, i.e. the arrangement direction of the strip-shaped groove 141 is the same as the arrangement direction of the pressure contact strip 2. Part of the pressure contact strip 2 is embedded in the strip-shaped groove 141, and the other part of the pressure contact strip 2 is located outside the strip-shaped groove 141, so that part of the pressure contact strip 2 protrudes from the pressure contact surface 14 of the first side plate 11 and the second side plate 12. In this way, the pressure contact strip 2 can be in full contact with the welding strip, thereby achieving an effective holding effect.

[0051] Further, the pressure contact strip 2 can be a tungsten wire strip with a circular cross section. Correspondingly, the strip-shaped groove 141 can be a semicircular strip-shaped groove with a semicircular cross section. The diameter of the strip-shaped groove 141 is close to the diameter of the tungsten wire strip, so that half of the tungsten wire strip is embedded in the strip-shaped groove 141, and the other half is located outside the strip-shaped groove 141. The tungsten wire strip located outside the strip-shaped groove 141 can effectively hold the welding strip and the bus bar in full contact, thereby realizing the welding of the two.

[0052] Optionally, as shown in Figure 3 and Figure 4 In some embodiments of the present application, the number of strip-shaped grooves 141 is multiple, and the multiple strip-shaped grooves 141 are arranged at intervals. The number of pressure contact strips 2 is multiple, and the multiple pressure contact strips 2 are embedded in the multiple strip-shaped grooves 141 one by one.

[0053] Specifically, in the embodiment, the number of the crimping bars 2 is multiple, the multiple crimping bars 2 are arranged at intervals, and the overall width dimension of the multiple crimping bars 2 is close to the width dimension of the bus bar. In this case, multiple strip-shaped grooves 141 can be arranged on the first side plate 11 and the second side plate 12 respectively, the multiple strip-shaped grooves 141 are arranged at intervals, and each strip-shaped groove 141 is embedded with one crimping bar 2. The crimping bars 2 arranged in this way are more conducive to heat dissipation during welding. If one of the crimping bars 2 is excessively worn or broken, the worn or broken crimping bar 2 can be replaced without affecting the other crimping bars 2, thereby being more conducive to controlling the maintenance cost of the crimping bars 2.

[0054] In other embodiments, the number of the crimping bars 2 can be one, the width dimension of the crimping bar 2 is close to the width dimension of the bus bar, the first side plate 11 and the second side plate 12 can be arranged with one strip-shaped groove 141 respectively, the width of the strip-shaped groove 141 is close to the width of the crimping bar 2, and part of the crimping bar 2 is embedded in the strip-shaped groove 141. The crimping bar 2 arranged in this way is more convenient to install and fix, thereby being more conducive to shortening the production cycle of the photovoltaic module welding device.

[0055] Optionally, Figure 5 is a schematic view of one side of the first side plate 11 away from the second side plate 12 in the embodiment of the application. As shown in Figure 5 , in some embodiments of the application, the welding mechanism further comprises a tensioning wheel 31. The tensioning wheel 31 is arranged on the side of the first side plate 11 away from the second side plate 12, and one end of the crimping bar 2 is fixed on the tensioning wheel 31.

[0056] Specifically, the tensioning wheel 31 is arranged on the side of the first side plate 11 away from the second side plate 12 and is fixedly connected with the first side plate 11. The tensioning wheel 31 can be fixed on the first side plate 11 by means of fastener assembly connection, so as to facilitate the disassembly and maintenance of the tensioning wheel 31 in the later stage. The end of the crimping bar 2 is fixed on the tensioning wheel 31. The tensioning wheel 31 can provide continuous tensioning force to maintain the stability of the crimping bar 2 and avoid the slipping phenomenon of the crimping bar 2 during the pressing process, thereby improving the pressing effect of the crimping bar 2 on the welding strip. The tensioning wheel 31 can also control the friction between the crimping bar 2 and the welding strip to a certain extent, thereby prolonging the service life of the crimping bar 2. The tensioning wheel 31 in the embodiment can be an automatic adjustment type tensioning wheel 31 or a manual adjustment type tensioning wheel 31, which can be flexibly arranged according to actual needs and costs.

[0057] Optionally, as shown in Figure 5 , in some embodiments of the application, the welding mechanism comprises a guide wheel 32. The guide wheel 32 is arranged on the side of the first side plate 11 away from the second side plate 12, and one end of the crimping bar 2 passes around the guide wheel 32 and is fixed on the tensioning wheel 31.

[0058] Specifically, the guide wheel 32 is also located on the side of the first side plate 11 opposite to the second side plate 12 and is fixedly connected to the first side plate 11. The guide wheel 32 can be fixed to the first side plate 11 by fastener assembly, welding, adhesive bonding, or limiting snap-fit, etc., and can be flexibly configured according to actual needs. The end of the crimping strip 2 bypasses the guide wheel 32 and is fixed to the tensioning wheel 31. The guide wheel 32 provides a bypass path for the crimping strip 2, preventing it from deviating from the predetermined trajectory, thereby improving the reliability of the connection between the crimping strip 2 and the tensioning wheel 31. The guide wheel 32 also helps to evenly distribute the tension on the crimping strip 2, preventing it from being too loose or too tight, thereby improving the crimping effect of the crimping strip 2 on the welding strip.

[0059] In addition, when there are multiple crimping strips 2, there can also be multiple guide wheels 32 and tension wheels 31, with multiple guide wheels 32 and tension wheels 31 arranged side by side. Figure 5 On the first side plate 11 shown, guide wheels 32 and tension wheels 31 are arranged in two rows, with tension wheels 31 on the outer side and guide wheels 32 on the inner side. The crimping strip 2 passes around the guide wheels 32 and is fixed to the corresponding tension wheel 31. The center position between the two rows of guide wheels 32 is in the same plane as the center position of the strip groove 141, in order to improve the situation where the crimping strip 2 slips into the strip groove 141.

[0060] Optionally, refer to Figure 1 As shown, in some embodiments of this application, the welding mechanism further includes: a fastening plate 33; the fastening plate 33 is fastened to the side of the second side plate 12 opposite to the first side plate 11, so as to fix the other end of the crimping strip 2 to the second side plate 12.

[0061] Specifically, the fastening plate 33 is located on the side of the second side plate 12 opposite to the first side plate 11, and is fastened to the second side plate 12, as shown in the figure. Figure 4 As shown, the second side plate 12 is provided with several rows of limiting grooves 121 on the side opposite to the first side plate 11, and the fastening plate 33 is provided with several rows of limiting protrusions. The end of the pressing strip 2 is located at the several rows of limiting grooves 121. The limiting protrusions on the fastening plate 33 are engaged with the limiting grooves 121 on the second side plate 12 to realize the fastening connection between the fastening plate 33 and the second side plate 12, thereby fixing the end of the pressing strip 2 between the fastening plate 33 and the second side plate 12.

[0062] In the above embodiment, the first side plate 11 is provided with the tensioning wheel 31, and the second side plate 12 is provided with the buckling plate 33, so as to fix the two ends of the crimping strip 2. In some other embodiments of the present application, the first side plate 11 and the second side plate 12 can be respectively provided with the tensioning wheel 31, so as to tension and fix the two ends of the crimping strip 2. Alternatively, the first side plate 11 and the second side plate 12 can be respectively provided with the buckling plate 33, so as to fix the two ends of the crimping strip 2.

[0063] Optionally, as shown in Figure 3 and Figure 4 In some embodiments of the present application, the welding mechanism further comprises a temperature measuring strip 4 and a temperature sensor. The temperature measuring strip 4 is located on the side close to the crimping surface 14 and extends along the first direction. One end of the temperature measuring strip 4 is fixed to the first side plate 11, and the other end of the temperature measuring strip 4 is fixed to the second side plate 12. The contact of the temperature sensor is connected with the temperature measuring strip 4.

[0064] Specifically, the temperature measuring strip 4 extends along the first direction, that is, the arrangement direction of the temperature measuring strip 4 is the same as the arrangement direction of the crimping strip 2. One end of the temperature measuring strip 4 is fixed to the first side plate 11, and the other end of the temperature measuring strip 4 is fixed to the second side plate 12. The fixed connection between the temperature measuring strip 4 and the first side plate 11 and the second side plate 12 can be adhesive connection, limiting clamping or the like, which can be flexibly set according to actual needs. The contact of the temperature sensor is connected with the temperature measuring strip 4, which can detect the temperature of the temperature measuring strip 4. Since the temperature measuring strip 4 is located on the side close to the crimping surface 14, the temperature of the temperature measuring strip 4 is close to the temperature of the crimping strip 2, so that the temperature detected by the temperature sensor can be regarded as the temperature of the crimping strip 2. The temperature sensor can detect the real-time temperature of the crimping strip 2 during the welding process, so as to avoid the phenomenon of overwelding or virtual welding.

[0065] In some embodiments, the temperature measuring strip 4 can be made of the same material as the crimping strip 2, so that the temperature of the temperature measuring strip 4 is more close to the temperature of the crimping strip 2, and the accuracy of the measured temperature is improved. The temperature sensor can be a thermocouple temperature sensor, a resistance temperature sensor, a semiconductor temperature sensor or the like, which is not limited in the present embodiment.

[0066] Optionally, as shown in Figure 3 and Figure 4 In some embodiments of the present application, the first side plate 11 and the second side plate 12 are respectively provided with through holes 15, and the through holes 15 have a spacing along the second direction with the crimping surface 14. The second direction intersects with the first direction. The two ends of the temperature measuring strip 4 pass through the corresponding through holes 15 and are connected with the first side plate 11 and the second side plate 12.

[0067] Specifically, the second direction intersects the first direction, and the angle between the second direction and the first direction can be any angle. In the embodiment, the second direction is perpendicular to the first direction, wherein "perpendicular" not only includes the case of absolute perpendicularity, but also includes the case of approximate perpendicularity as generally recognized, such as the case where the included angle between the second direction and the first direction is 89°-91°, which is regarded as the case where the second direction is perpendicular to the first direction. In the case where the second direction is perpendicular to the first direction, the second direction corresponds to the height direction of the first side plate 11 and the second side plate 12.

[0068] The through hole 15 has a spacing along the second direction from the crimping surface 14, so as to prevent the arrangement of the through hole 15 from affecting the arrangement of the strip-shaped groove 141. One end of the temperature measuring strip 4 passes through the through hole 15 on the first side plate 11 and is fixed to the side of the first side plate 11 away from the second side plate 12. The other end of the temperature measuring strip 4 passes through the through hole 15 on the second side plate 12 and is fixed to the side of the second side plate 12 away from the first side plate 11. In some embodiments, the spacing along the second direction between the through hole 15 and the crimping surface 14 can be no more than 10 mm, so as to avoid that the too large spacing affects the temperature consistency between the temperature measuring strip 4 and the crimping strip 2. In addition, if the temperature measuring strip 4 is made of the same material as the crimping strip 2, such as a tungsten strip with a circular cross section, the through hole 15 can be a circular through hole, and the diameter of the circular through hole is close to the diameter of the temperature measuring strip 4, so as to ensure that the temperature measuring strip 4 can pass through the through hole 15 smoothly.

[0069] Optionally, referring to FIG. 1, Figure 3 In some embodiments of the present application, the end of the first side plate 11 away from the top plate 10 is provided with a protruding portion 16, and the crimping surface 14 is arranged on the protruding portion 16. Alternatively, the end of the second side plate 12 away from the top plate 10 is provided with a protruding portion 16, and the crimping surface 14 is arranged on the protruding portion 16. Alternatively, the ends of the first side plate 11 and the second side plate 12 away from the top plate 10 are respectively provided with protruding portions 16, and the crimping surface 14 is arranged on the corresponding protruding portion 16. Specifically, the protruding portion 16 protrudes along the second direction, and the size of the protruding portion 16 is small. In this way, it is helpful to avoid interference between the ends of the first side plate 11 and the second side plate 12 and the solder strip during the process of holding and pressing the solder strip by the crimping strip 2, and it is also helpful to position the contact position of the crimping strip 2 and the solder strip, so as to realize smooth welding and improve the welding effect.

[0070] Optionally, referring to FIG. 1, Figure 1 and Figure 2As shown in the drawings, in some embodiments of the present application, the welding mechanism further comprises a heating assembly; the heating assembly is arranged between the top plate 10 and the compression strip 2, and the heating assembly is connected with the top plate 10, or the heating assembly is connected with the first side plate 11 and the second side plate 12. Specifically, the heating assembly can be connected with the top plate 10 to achieve the installation and fixation of the heating assembly, and the heating assembly can also be connected with the first side plate 11 and the second side plate 12 to achieve the installation and fixation of the heating assembly, which can be flexibly set according to actual conditions. The heating assembly is mainly used to provide heat in the welding process of the welding strip and the bus bar, so that the part of the welding strip in contact with the bus bar is heated and melted, thereby realizing the welding of the two.

[0071] Optionally, referring to Figure 1 and Figure 2 As shown in the drawings, in some embodiments of the present application, the heating assembly comprises a heating pipe 51 and a reflecting plate 52; the reflecting plate 52 is connected with the top plate 10, and the heating pipe 51 is arranged on the side of the reflecting plate 52 away from the top plate 10 and is connected with the reflecting plate 52.

[0072] Specifically, the reflecting plate 52 is connected with the top plate 10 through a connecting column 53, and the connecting column 53 and the top plate 10 and the connecting column 53 and the reflecting plate 52 can be fixedly connected together by means of fastener assembly connection, welding, limiting clamping, adhesive connection, etc. to achieve the installation and fixation of the reflecting plate 52. The heating pipe 51 can adopt an infrared lamp tube, which generates heat when current flows through the heating element (such as metal wire or metal electrode in quartz tube) in the lamp tube, and the generated heat is released in the form of infrared radiation. The heating pipe 51 is arranged on the side of the reflecting plate 52 away from the top plate 10 and is connected with the reflecting plate 52 through the bayonet of the lamp tube end. After the heating pipe 51 is powered on, heat is generated, which raises the temperature of the welding device. The reflecting plate 52 can reflect most of the heat generated by the heating pipe 51 to the lower side, i.e. the side where the compression strip 2 is located, to ensure that the temperature of the welding part meets the requirements and realizes the effective welding of the welding strip and the bus bar.

[0073] Optionally, referring to Figure 1 and Figure 2 As shown in the drawings, in some embodiments of the present application, the distance between the reflecting plate 52 and the heating pipe 51 is smaller than the distance between the reflecting plate 52 and the top plate 10, so as to ensure that most of the heat generated by the heating pipe 51 is reflected to the side where the compression strip 2 is located, improve the utilization rate of heat, and thus help to save power and ensure the welding effect. In addition, such arrangement can also limit excessive heat from being transferred to the top plate 10, so as to avoid damaging the electronic devices and the like installed on the top plate 10.

[0074] Optionally, Figure 6 is a schematic view of a reflecting plate 52 in some embodiments of the present application, referring to Figure 1 and Figure 6As shown in FIG. 1, in some embodiments of the present application, the welding mechanism further comprises a fan 6, the fan 6 is installed on the top plate 10, and the air outlet of the fan 6 is arranged towards the reflecting plate 52, and a plurality of hollow holes 521 are formed in the reflecting plate 52. Specifically, the fan 6 can play a role of rapid cooling after welding, so as to facilitate the next welding. A plurality of hollow holes 521 are formed in the reflecting plate 52, and the plurality of hollow holes 521 are arranged at intervals on the reflecting plate 52. The wind blown by the fan 6 can pass through the hollow holes 521 and blow on the heating pipe 51, so as to play a role of rapid cooling on the heating pipe 51, and avoid affecting the service life of the heating pipe 51 due to long time in overheating state.

[0075] Optionally, referring to Figure 1 and Figure 2 As shown in FIG. 1, in some embodiments of the present application, the welding mechanism further comprises two third side plates 13, the two third side plates 13 are arranged along the first direction and are connected with the top plate 10, the first side plate 11 and the second side plate 12 respectively, and a rectangular cavity is formed between the two third side plates 13, the top plate 10, the first side plate 11 and the second side plate 12, and the heating assembly is arranged in the cavity.

[0076] Specifically, the two third side plates 13 correspond to the two sides of the top plate 10 in the width direction (only one third side plate 13 is shown in FIG. 1), the first side plate 11 and the second side plate 12 correspond to the two sides of the top plate 10 in the length direction, and the top plate 10, the first side plate 11, the second side plate 12 and the two third side plates 13 are connected to form a rectangular cavity. The cavity is beneficial to accumulate heat during welding, so as to avoid the phenomenon of virtual welding due to too low heat at the welding position. Figure 1 Figure 2 Optionally, in some embodiments of the present application, the photovoltaic module welding device further comprises a driving mechanism, the driving mechanism is connected with the top plate 10, and the driving mechanism is used for driving the welding mechanism to move along the second direction through the top plate 10.

[0077] Specifically, the cell is arranged below the welding device along the second direction. When it is necessary to perform the welding action, the driving mechanism drives the welding device to move towards the cell. When it is necessary to perform the reset action after welding, the driving mechanism drives the welding device to move away from the cell.

[0078] In the embodiment, the driving mechanism comprises two mounting plates, i.e. a first mounting plate 71 and a second mounting plate 72, the first mounting plate 71 is used for mounting the welding mechanism, and referring to

[0079] In the embodiment, the driving mechanism comprises two mounting plates, i.e. a first mounting plate 71 and a second mounting plate 72, the first mounting plate 71 is used for mounting the welding mechanism, and referring to Figure 1 ​As shown, the welding mechanism is provided with a hanging plate 17, which is fixedly connected with the first mounting plate 71 to realize the connection between the welding mechanism and the driving mechanism. The second mounting plate 72 is used for mounting the driving member, which is connected with the first mounting plate 71, so that the driving member can drive the first mounting plate 71 to move in the second direction to realize the movement of the welding mechanism. In addition, the driving mechanism further comprises a support frame 73, which is used for supporting the welding mechanism, and the second mounting plate 72 is fixed on the support frame 73.

[0080] The embodiment of the present application further provides a photovoltaic device, Figure 7 Fig. 1 is a schematic diagram of a photovoltaic device according to an embodiment of the present application, Figure 8 Fig. 2 is a schematic diagram of a photovoltaic device without a welding mechanism according to an embodiment of the present application, referring to Figure 7 and Figure 8 As shown, the photovoltaic device comprises a cell piece support 81 and a photovoltaic module welding device according to any one of the preceding embodiments; the cell piece support 81 is adapted to support cell pieces, and the photovoltaic module welding device is adapted to weld a solder strip 83 with a busbar 84, wherein the pressure contact strip 2 is adapted to pressure contact the solder strip 83.

[0081] Specifically, the cell piece support 81 is adapted to support a cell string 82 formed by series connection of the cell pieces through the solder strip 83, Figure 9 Fig. 3 is a schematic diagram of a cell piece placed on the cell piece support 81 according to an embodiment of the present application, Figure 10 Fig. 4 is a partial schematic diagram of a cell piece welding process according to an embodiment of the present application, referring to Figure 9 and Figure 10 As shown, the welding process of the photovoltaic device is as follows: the edge part of the cell string 82 is placed on the cell piece support 81, so that the solder strip 83 on the cell string 82 is placed directly below the pressure contact strip 2 in the welding mechanism; the driving mechanism in the welding device is actuated to drive the welding mechanism to move towards the side close to the cell piece support 81, i.e. the welding mechanism moves downward; then the pressure contact strip 2 in the welding mechanism presses the solder strip 83 on the cell string 82 to make it tightly contact the busbar 84. At this time, the heating pipe 51 starts to work, and the part of the solder strip 83 on the cell string 82 in contact with the busbar 84 is heated and melted to realize welding.

[0082] In the above welding process, the temperature sensor mounted on the temperature measuring strip 4 monitors the temperature of the welding part in real time to avoid overwelding or false welding. After the welding is completed, the driving mechanism drives the welding mechanism to move towards the side away from the cell piece support 81, i.e. the welding mechanism moves upward, so that the pressure contact strip 2 is separated from the welding area. Then, the cell string 82 is replaced for the next welding, and the above process is repeated. The photovoltaic device of the embodiment can realize the welding of any number of cell strings 82, and when several cell strings are welded, the welding device only needs to be combined side by side.

[0083] It is to be understood that the terminology "some embodiments", "other embodiments", etc. used throughout this specification can refer to the same or different embodiments as each other, and can not necessarily describe all embodiments according to the application. Furthermore, the use of the terms "first", "second", etc. do not necessarily indicate that the entities so described must be in a different region or have different properties. Such terms are only used to distinguish one general category of components or methods from another where appropriate. The mere use of the term preference, desire, said, might, can, may etc, does not mean that the use of these terms necessarily involves any prejudice, preference, desire, recitation, or suggestion that any specific element, feature, structure, or characteristic of the application is preferred, desirable, essential, required, or necessary. The terminology encompasses the explicit recitation of features or characteristics, and also suggestions of features or characteristics that can be equivalent to, or a subset of, the recited features or characteristics.

[0084] Finally, it is to be understood that the above description is intended to be illustrative and not restrictive. Many other embodiments will be apparent to those of skill in the art upon reading the above description and the appended claims, and it is therefore intended that the application be understood to be in all aspects as the following claims allow.

Claims

1. A photovoltaic module welding apparatus, characterized by, The welding mechanism comprises a top plate, a first side plate, a second side plate and a pressing strip; The first side plate and the second side plate are arranged on opposite sides of the top plate along a first direction and are connected with the top plate; The first side plate and the second side plate respectively have a pressing surface at one end thereof away from the top plate; The pressing strip extends along the first direction, one end of the pressing strip is fixed on the first side plate by passing around the pressing surface of the first side plate, and the other end of the pressing strip is fixed on the second side plate by passing around the pressing surface of the second side plate.

2. The photovoltaic module welding apparatus of claim 1, wherein, A strip-shaped groove is arranged on the pressing surface and extends along the first direction, and part of the pressing strip is embedded in the strip-shaped groove.

3. The photovoltaic module welding apparatus of claim 2, wherein, The number of the strip-shaped grooves is multiple, and the multiple strip-shaped grooves are arranged at intervals, and the number of the pressing strips is multiple, and the multiple pressing strips are embedded in the multiple strip-shaped grooves one by one.

4. The photovoltaic module welding apparatus of claim 1, wherein, The welding mechanism further comprises a tensioning wheel; The tensioning wheel is arranged on the side of the first side plate away from the second side plate, and one end of the pressing strip is fixed on the tensioning wheel.

5. The photovoltaic module welding apparatus of claim 4, wherein, The welding mechanism comprises a guide wheel; The guide wheel is arranged on the side of the first side plate away from the second side plate, and one end of the pressing strip passes around the guide wheel and is fixed on the tensioning wheel.

6. The photovoltaic module welding apparatus of claim 1, wherein, The welding mechanism further comprises a buckling plate; The buckling plate is buckled and connected with the side of the second side plate away from the first side plate to fix the other end of the pressing strip on the second side plate.

7. The photovoltaic module welding apparatus of claim 1, wherein, The welding mechanism further comprises a temperature measuring strip and a temperature sensor; The temperature measuring strip is arranged on the side close to the pressing surface and extends along the first direction, one end of the temperature measuring strip is fixed on the first side plate, the other end of the temperature measuring strip is fixed on the second side plate, and the contact of the temperature sensor is connected with the temperature measuring strip.

8. The photovoltaic module welding apparatus of claim 7, wherein, The first side plate and the second side plate are respectively provided with through holes, and the through holes and the pressing surfaces have a spacing along a second direction; The two ends of the temperature measuring strip pass through the corresponding through holes and are connected with the first side plate and the second side plate.

9. The photovoltaic module welding apparatus of claim 1, wherein, The end of the first side plate away from the top plate is provided with a protruding portion, and the pressing surface is arranged on the protruding portion; The end of the second side plate away from the top plate is provided with a protruding portion, and the pressing surface is arranged on the protruding portion.

10. The photovoltaic module welding apparatus according to any one of claims 1 to 9, characterized in that, The welding mechanism further comprises a heating assembly; The heating assembly is arranged between the top plate and the pressing strip, and the heating assembly is connected with the top plate, or the heating assembly is connected with the first side plate and the second side plate.

11. The photovoltaic module welding apparatus of claim 10, wherein, The heating assembly comprises a heating pipe and a reflecting plate; The reflecting plate is connected with the top plate, and the heating pipe is arranged on the side of the reflecting plate away from the top plate and is connected with the reflecting plate.

12. The photovoltaic module welding apparatus of claim 11, wherein, The spacing between the reflecting plate and the heating pipe is smaller than the spacing between the reflecting plate and the top plate.

13. The photovoltaic module welding apparatus of claim 11, wherein, The welding mechanism further comprises a fan; The fan is installed on the top plate, and an air outlet of the fan is arranged towards the reflection plate, and a plurality of hollow holes are formed in the reflection plate.

14. The photovoltaic module welding apparatus of claim 10, wherein, The welding mechanism further comprises two third side plates; The two third side plates are arranged along the first direction and connected with the top plate, the first side plate and the second side plate respectively, and a rectangular cavity is formed between the two third side plates, the top plate, the first side plate and the second side plate, and the heating assembly is arranged in the cavity.

15. The photovoltaic module welding apparatus of claim 1, wherein, Further comprising a driving mechanism; The driving mechanism is used for driving the welding mechanism to move along a second direction, wherein the second direction intersects with the first direction.

16. A photovoltaic device, characterized by The photovoltaic module welding device comprises a battery piece support and a photovoltaic module welding device as claimed in any one of claims 1-15. The battery piece support is adapted to support a battery piece, and the photovoltaic module welding device is adapted to weld a welding strip and a bus bar, wherein the pressing strip is adapted to press the welding strip.

Images