Electric injection type photovoltaic module packaging equipment

Abstract

The utility model aims to solve the technical problems in the prior art that when electric injection is carried out on a photovoltaic module in a lamination process, the pressure of an electrode is easy to generate indentations and pits on the surface of the photovoltaic module and the photovoltaic module is not safe when the electric injection is carried out on the photovoltaic module which is not solidified and still in a softened state by the electrode. The utility model provides electric injection type photovoltaic module packaging equipment, which comprises a lamination curing unit and a discharging unit, and the discharging unit comprises a discharging transmission device composed of a discharging transmission part and a discharging transmission driving mechanism. The discharging transmission driving mechanism drives the discharging transmission part to operate to receive the photovoltaic module and transmit the photovoltaic module to a preset position, by adopting the electric injection type photovoltaic module packaging equipment, indentations and pits cannot be generated on the surface of the photovoltaic module during electric injection, the photoelectric conversion efficiency of the photovoltaic module is improved to a certain extent, and the packaging efficiency of the photovoltaic module is improved. The method is a major breakthrough in the field.

Description

Technical Field

[0001] The utility model relates to the technical field of laminators, in particular to electric injection type photovoltaic component packaging equipment. Background Art

[0002] Photovoltaic modules are increasingly valued as a clean energy source. With the development of photovoltaic module technology, the requirements for the quality of photovoltaic modules are increasing, and the improvement of the conversion efficiency of photovoltaic modules has become a new growth point today. In order to improve the conversion efficiency of photovoltaic modules, the implementation of electrical injection of photovoltaic modules has been completed in the laboratory. In the laboratory stage, the electrodes are manually connected to the cells of the photovoltaic modules to implement electrical injection. A Chinese invention patent named Photovoltaic Module Lamination Device discloses a photovoltaic module lamination device provided with an electrical injection device, and its patent application number is 202111514164.2, and its publication number is CN113895131A. It can complete electrical injection simultaneously during the lamination process. The laminating device includes a supporting component, a pressing component and a power component, wherein the power component is arranged on the pressing component, the supporting component is used to support the photovoltaic component, the pressing component can move toward the supporting component to squeeze the photovoltaic component, the heating component is used to heat the photovoltaic component, the power component can be electrically connected with the photovoltaic component when the pressing component is pressed on the photovoltaic component to inject current into the photovoltaic component, the pressing component includes a pressing plate, a window is provided on the pressing plate, the power component includes a power supply and a pair of electrodes, the electrodes are electrically connected to the power supply, the electrodes of the power component are arranged at the window, so that when the pressing component is pressed on the photovoltaic component, the power component can be electrically connected to the photovoltaic component through the window, and a cover plate is arranged on the side of the pressing plate away from the supporting component, and the cover plate is used to open or close the window. Therefore, when the pressing component is pressed against the supporting component, the photovoltaic component can be enclosed between the pressing plate and the supporting component. The photovoltaic module lamination device adopts the above structure, because the lamination of photovoltaic modules is completed during the lamination process, when the electrode contacts the photovoltaic module, the adhesive film between the layers of the photovoltaic module is in a softened state, and the photovoltaic module has not yet been solidified. Therefore, it is easy to produce indentations or pits on the photovoltaic module, affecting the quality of the photovoltaic module. In addition, because the electrode is set at the window opened on the pressure plate and fixed on the lower pressure component, the position of the lower pressure component is fixed, and the conveying position of the photovoltaic module is deviated each time. Therefore, the relative position between the electrode and the injection electrode sheet of the photovoltaic module is variable. Therefore, the position of the electrode and the confluence will deviate, so that the electrode cannot contact the injection electrode sheet when current flows in, and the current cannot be injected as expected, and leakage accidents are prone to occur, bringing unsafe hidden dangers. Utility Model Content

[0003] The purpose of the utility model is to provide an electric injection photovoltaic module packaging device to address the technical problem that in the prior art, electric injection is performed on photovoltaic modules during the lamination process, so that the pressure of the electrodes when the electrodes are injected into the uncured and softened photovoltaic modules is likely to cause indentations, pits and unsafe technical problems on the surface of the photovoltaic modules.

[0004] The technical solution of the utility model to solve the technical problem is as follows:

[0005] An electric injection type photovoltaic module packaging device comprises a lamination curing unit and a discharging unit, wherein the discharging unit comprises a discharging transmission device composed of a discharging transmission component and a discharging transmission driving mechanism, wherein the discharging transmission driving mechanism drives the discharging transmission component to operate to receive photovoltaic modules and transmit the photovoltaic modules to a predetermined position, and further comprises an electric injection unit, wherein the electric injection unit is located outside the lamination curing unit and comprises a robot assembly and an electrode assembly, wherein the electrode assembly comprises an electrode and an insulating mounting plate, wherein the electrode is connected to the output end of the robot assembly through the insulating mounting plate, wherein the robot assembly drives the electrode assembly to move so that the electrode butts against the injection electrode sheet of the photovoltaic module, thereby implementing electric injection or leaving the injection electrode sheet to terminate electric injection, and after the photovoltaic module is transmitted from the hot cavity of the lamination curing unit and transmitted to the predetermined position, electric injection is implemented on the photovoltaic module;

[0006] It also includes a mechanical correction mechanism, through which the photovoltaic assembly on the discharge transmission device is corrected to a predetermined position, and the manipulator assembly includes an X-axis servo drive mechanism, a Y-axis servo drive and a Z-axis lifting drive mechanism, the X-axis servo drive mechanism drives the electrode assembly to move along the X-axis, the Y-axis servo drive mechanism drives the electrode assembly to move along the Y-axis so that the electrode assembly is aligned with the injection electrode sheet on the photovoltaic assembly, and the Z-axis lifting drive mechanism drives the electrode assembly to move along the Z-axis so that the probe of the electrode assembly presses the injection electrode sheet to perform electrical injection;

[0007] The manipulator assembly also includes a crossbeam arranged along the Y-axis, the crossbeam spans above the cooling platform and is perpendicular to the X-axis direction, the Y-axis servo drive mechanism is fixedly arranged on the crossbeam, and its output end is fixedly connected to the X-axis servo drive mechanism to drive the X-axis servo drive mechanism to move along the Y-axis direction, the support beam is arranged along the X-axis direction, the output end of the X-axis servo drive mechanism is connected to two Z-axis lifting drive mechanisms, a slide rail is arranged on the support beam along the X-axis direction, the Z-axis lifting drive mechanism is slidably connected to the support beam through the slide rail and the slider, the output end of the Z-axis lifting drive mechanism is fixedly connected to the electrode assembly, and also includes a cooling unit, the cooling unit includes a cooling platform, the discharge transmission device is a high-temperature cloth transmission device, the high-temperature cloth is a transmission component of the discharge transmission device, the high-temperature cloth is arranged around the cooling platform, a cooling medium channel is arranged in the cooling platform, a cooling medium is arranged in the cooling medium channel, and the cooling medium channel is used to communicate with the cooler, thereby completing the exchange of the cooling medium; and / or the Z-axis lifting drive mechanism is a servo drive mechanism or a cylinder or an electric cylinder;

[0008] The electrode assembly includes an electrode and an insulating mounting plate. The electrode is arranged below the insulating mounting plate, one end of the electrode passes through the insulating mounting plate and is connected to a locking nut, and the other end is provided with a probe, and a spring is provided between the insulating mounting plate and the probe.

[0009] It also includes a visual system, the visual system includes a camera and a camera bracket, the camera is arranged on the crossbeam through the camera bracket, the camera lens is arranged corresponding to the predetermined position of the photovoltaic module, and is aligned with the predetermined stop position of the photovoltaic module. The visual system obtains the position of the injection electrode sheet after the photovoltaic module is corrected through the camera, and calculates the distance between the injection electrode sheet and the electrode assembly. The manipulator assembly moves the electrode assembly according to the calculated distance so that the electrode can be pressed onto the injection electrode sheet;

[0010] Each photovoltaic module is equipped with a robot assembly, and the servo drive of each robot assembly is connected to the output end electrical signal of the control system, and the control system controls the synchronous movement of each robot assembly;

[0011] The discharging unit comprises a multi-layer photovoltaic module discharging transmission device, and the discharging transmission components of each photovoltaic module discharging transmission device are arranged in the upper and lower layers. Each layer of photovoltaic module discharging transmission device is respectively provided with a corresponding robot assembly, and the robot assembly of each layer is connected with the control system by electrical signals, and the control system controls the synchronous movement of the robot assembly of each layer; or each layer of the robot assembly is respectively provided with a sub-control system, and the sub-control system controls the synchronous movement of the robot assembly of each layer;

[0012] After the photovoltaic modules are laminated and cured and before the cooling step, the photovoltaic modules are electrically injected, and immediately after the photovoltaic modules are discharged from the lamination chamber, the photovoltaic modules are electrically injected, and then the photovoltaic modules are cooled after the electrical injection;

[0013] After all the photovoltaic modules laminated once are discharged from the lamination chamber, electricity is injected into the discharged photovoltaic modules simultaneously;

[0014] A cooling platform with cooling medium passing through it is used as a supporting platform during electricity injection. After electricity injection into the photovoltaic module is completed, the cooling medium is used to replace the medium that absorbs heat during the cooling process.

[0015] The advantages and beneficial effects of the utility model are:

[0016] After the photovoltaic modules are discharged from the laminating machine, the position of the photovoltaic modules is calibrated on the discharge conveyor on the discharge side before electrical injection, which can ensure that the relative position of the photovoltaic modules and the electrodes remains unchanged, so that the relative position of the electrodes and the electrode sheets injected into the photovoltaic modules remain aligned, and the electrodes can stably contact with the injected electrode sheets.

[0017] The electric injection type photovoltaic module packaging equipment using the structure of the utility model has an electric injection mechanism arranged outside the lamination curing chamber. When the photovoltaic module is transferred to the predetermined position of the discharge transmission unit, the photovoltaic module is subjected to electric injection. Therefore, the photovoltaic module has been cured and maintained at a relatively high temperature. Therefore, no indentations or pits are generated on the surface of the photovoltaic module during electric injection, and the photovoltaic module has a certain improvement in photoelectric conversion efficiency.

[0018] With the equipment of the utility model, although the photoelectric conversion rate of a single photovoltaic module does not seem to be very obvious, with the current development of photovoltaic technology, it is extremely difficult to improve the photoelectric conversion efficiency a little bit, especially when the photovoltaic modules are used for power generation. Since the amount of photovoltaic modules in each unit is huge, the improvement of the photoelectric conversion efficiency of many photovoltaic modules together is huge, which is also a major breakthrough in this field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the electric injection photovoltaic module packaging device of the utility model;

[0020] Figure 2 Another embodiment of the utility model of the electric injection photovoltaic module packaging equipment overall structure schematic diagram, which omits the lamination heat chamber host, only showing the discharge station side;

[0021] Figure 3 This is a schematic structural diagram of an embodiment of an electric injection unit for electric injection type photovoltaic module packaging equipment of the utility model;

[0022] Figure 4 A schematic diagram of the structure of an embodiment of the correction mechanism of the electric injection unit of the utility model;

[0023] Figure 5 A schematic diagram of the structure of the manipulator assembly embodiment of the utility model electric injection unit;

[0024] Figure 6 A schematic diagram of the structure of a visual system embodiment of the utility model electric injection unit;

[0025] Figure 7 This is a schematic diagram of the structure of an embodiment of an electrode assembly of the electric injection unit;

[0026] Figure 8 It is a schematic structural diagram of an embodiment of a discharging unit of the utility model using a multi-layer stacked discharging platform.

[0027] Description of Reference Numerals

[0028] 100-frame, 110-beam, 120-injection electrode sheet; 121-module positive electrode; 122-module negative electrode; 130-photovoltaic module

[0029] 200-discharging unit, 210-discharging transmission device,

[0030] 300-Cooling unit, 310-Cooling platform

[0031] 400-electric injection unit, 410-mechanical alignment mechanism, 411-alignment drive, 412-guide wheel, 413-alignment frame, 430-manipulator assembly, 431-X-axis servo drive mechanism, 432-Y-axis servo drive mechanism, 433-support beam, 450-visual system, 451-camera, 452-camera bracket, 453-light source, 454-lens

[0032] 480-electrode assembly, 481-electrode, 482-probe, 483-buffer spring, 484-insulating mounting plate, 490-electrode assembly lifting device, DETAILED DESCRIPTION

[0033] The present invention is further described in detail below through specific embodiments, which are only descriptive and not restrictive, and cannot be used to limit the protection scope of the present invention. The description is based on the actual use position of the photovoltaic module laminator in actual application.

[0034] The photovoltaic module packaging method of the utility model includes a photovoltaic module lamination and curing step and a photovoltaic module cooling and cooling step. After the photovoltaic module lamination and curing step is completed and before the photovoltaic module cooling and cooling step, the photovoltaic module is quickly discharged from the lamination and curing chamber. The temperature drop of the photovoltaic module during the discharge process is preferably controlled at 0-40C°. After the discharge is in place, the photovoltaic module is electrically injected. After the electrical injection is completed, cooling and cooling are performed. It is best to simultaneously perform electrical injection for all photovoltaic modules that are in place. When implementing electrical injection, the current injected into each module is consistent and the injection time is consistent. It is best to perform correction on each photovoltaic module that is in place before electrical injection, and perform electrical injection when it is corrected to correspond to the electrode position of the electrical injection mechanism. Further, after the photovoltaic module is corrected, the position of the injection electrode sheet on the corrected photovoltaic module is located by a visual system, and the distance between the injection electrode sheet of the photovoltaic module and the aligned electrode probe is calculated, and then the probe and the injection electrode sheet of the photovoltaic module are accurately aligned by moving the probe by a corresponding distance. During the electric injection, the temperature of the photovoltaic module is different depending on the type of module, and it is best to control it to be lower than its lamination curing temperature of 0-40C°. For example, for N-type modules, the temperature of the photovoltaic module during the electric injection is preferably controlled at 90-140 degrees, the power supply of the electric injection is 0-60 volts, the current is 0-20 amps, and the injection time is 0-300 seconds. Through testing, the photoelectric conversion efficiency of each photovoltaic module can be increased by 0-5W after the electric injection, and the improvement of the photoelectric conversion efficiency is different for different module process forms. As the power station is constantly expanding, the amount of modules used in each power station is huge. Therefore, for the entire photovoltaic power generation system, the improved photoelectric conversion efficiency is considerable. In the utility model, since the photovoltaic module is laminated and cured and quickly transmitted after coming out of the lamination curing chamber, the temperature drop of the photovoltaic module during the transmission process is relatively small, generally only 0-40C°. After the photovoltaic module is transferred to the right place, the photovoltaic module is electrically injected. Therefore, the photovoltaic module still maintains a relatively high temperature. At this time, the photovoltaic module is electrically injected to ensure a relatively high photoelectric conversion efficiency. In order to further improve the photoelectric conversion efficiency and maintain the temperature of the photovoltaic module after discharge, the photovoltaic module can be heated during the discharge and / or electrical injection process to maintain the lamination curing temperature, and then cooled after the electrical injection is completed.

[0035] The photovoltaic module packaging process of the utility model can be realized by using the electric injection type photovoltaic module packaging equipment of the following embodiment structure. Figure 1-Figure 7As shown, the electric injection type photovoltaic module packaging equipment of the embodiment structure of the utility model includes a lamination curing unit (not shown in the figure), a discharging unit 200 and an electric injection unit 400. The lamination curing unit completes the lamination curing of the photovoltaic module and transfers the photovoltaic module out of the lamination curing chamber through the photovoltaic module transmission component. The discharging unit 200 is used to receive the photovoltaic module transferred out of the lamination curing chamber and transfer the photovoltaic module to a predetermined position. Usually, the photovoltaic modules are arranged in a linear single row, so after being transferred in place, the photovoltaic modules are also discharged in a single row. The discharging unit includes a discharging transmission device composed of a module discharging transmission component and a discharging transmission component driving mechanism, and the discharging transmission component is driven by the discharging transmission component driving device to operate, and the discharging transmission component receives the photovoltaic module transferred out of the lamination curing chamber carrying the photovoltaic module, and stops the transmission at a predetermined position, so that the photovoltaic module stops at a predetermined position. The electric injection unit includes at least one single electric injection unit, and each single electric injection unit includes an electrode assembly, a manipulator assembly that drives the electrode assembly to align with the injection electrode sheet on the photovoltaic module and presses the injection electrode sheet. After the electric injection is completed, the robot assembly drives the electrode assembly back to its position. It is best to set up a visual system, which obtains the position of the photovoltaic module injection electrode sheet and feeds it back to the control system. The control system calculates the distance between the photovoltaic module injection electrode sheet and the electrode assembly, drives the robot assembly to move the electrode assembly to a position relative to the photovoltaic module injection electrode sheet, and drives the electrode assembly to rise and fall so that the electrode contacts the injection electrode sheet to inject current or leaves the injection electrode sheet.

[0036] Normally, photovoltaic modules need to be cooled after being discharged from the lamination chamber. Therefore, it is best to set up a cooling unit to cool down the photovoltaic modules that have been transferred to the right place and completed the electrical injection. The cooling unit has two basic structural forms. One structural form is to use a fan as a cooling device. The fan is generally arranged below or above the discharge transmission device to blow air to cool the photovoltaic modules. At this time, a roller transmission device is used as the discharge transmission device. The roller transmission device is located on the discharge side of the lamination host. Each roller operates a discharge transmission component. Each roller rotates synchronously. The transmission plane formed by the upper surface of each roller is in the same transmission plane as the transmission component of the lamination host. The roller receives the photovoltaic modules transmitted by the lamination host and transmits the photovoltaic modules to a predetermined position. The fan is arranged below the two rollers to blow air to cool the photovoltaic modules. Another structure is to use a cooling platform 310 with cooling medium as a cooling device. The cooling platform is located at the discharge side of the laminating main machine. The discharge transmission device uses a high-temperature cloth transmission device. The high-temperature cloth conveyor belt surrounds the cooling platform. The high-temperature cloth serves as a discharge transmission component to receive the photovoltaic components transmitted by the laminating main machine, and transmits the photovoltaic components to a predetermined position under the action of the high-temperature cloth chain transmission drive device. The cooling medium in the cooling platform is connected to the cooling machine through a cooling pipe, and the cooling medium is circulated through the cooling machine. The high-temperature cloth conveyor belt transmits the photovoltaic components to the cooling platform, and the photovoltaic components are cooled on the cooling platform.

[0037] In the present utility model, the robot assembly can be performed by a robot arm, which can be arranged next to the discharge unit. The electrode assembly can be moved by the robot arm, and the following structure can also be adopted, including an X-axis servo drive mechanism 431, a Y-axis servo drive mechanism 432, a support beam 433 and an electrode assembly lifting device 490. The electrode assembly lifting device serves as the Z-axis servo drive of the robot assembly. An electrode assembly lifting device is respectively arranged at both ends of the support beam. An electrode assembly 480 is respectively arranged at the output end of each electrode assembly driving device 490, and the electrode assembly is driven to be lifted and lowered by the electrode assembly lifting device. The output end of the X-axis servo drive mechanism is connected to two electrode assembly lifting devices, and the two electrode assembly lifting devices are respectively fixedly arranged at both ends of the support beam. The output end of the Y-axis servo drive mechanism is fixedly connected to the X-axis servo drive mechanism. The Y-axis servo drive mechanism is fixedly arranged on a crossbeam 110 arranged along the Y-axis direction and straddling the discharge transmission device. The length directions of the crossbeam and the support beam are arranged vertically. The robot assembly adopting the above structure, the Y-axis servo drive mechanism can drive the X-axis servo drive mechanism and the support beam to move along the length direction of the beam, that is, the Y-axis direction, so as to adjust the position of the electrode assembly in the Y-axis direction, the X-axis servo drive mechanism can drive the electrode assemblies on both sides to move along the X-axis direction to adjust the position of the electrode assembly in the X-axis, and the electrode assembly lifting device adjusts the position of the electrode assembly in the Z-axis direction, so as to achieve all-round position adjustment of the electrode assembly. The electrode of one electrode assembly is used to connect to the positive pole of the power supply, and the electrode of the other electrode assembly is used to connect to the negative pole of the power supply. The electrode assembly preferably adopts the following structure, including an electrode 481, the electrode is fixedly connected to the output end of the electrode assembly lifting device 490 through an insulating mounting plate 484, a probe 482 is provided at the free end of the electrode, and a buffer spring 483 is provided on the electrode jacket, the spring is located between the insulating mounting plate and the probe, and the mounting end of the electrode passes through the insulating mounting plate and is locked by a nut 485. Preferably, a double-axis electric cylinder or a cylinder is used as the electrode assembly lifting device, which can improve the stability of the structure. It is best to set two electrodes for each electrode assembly, and the probe connects the two electrodes. The probe is in the shape of a long strip, so that the length of the probe is relatively long. When the electrode is opposite to the injection electrode sheet, the length direction of the probe is set perpendicular to the length direction of the injection electrode sheet. This can increase the compatibility of the electrode, reduce the difficulty of aligning the probe with the injection electrode sheet, and prevent the probe from missing the injection electrode sheet. Setting two electrodes and fixedly connecting the probe can prevent the probe from rotating when in contact with the injection electrode sheet, improve the stability of the contact, and improve the success rate of electrical injection. When setting the probe, the center position of the probe is usually used as a reference position for position calculation. Since the positions of the probe and the electrode on the X-axis and Y-axis are fixed, in the description of this patent, for the convenience of description, when explaining the alignment position with the injection electrode sheet on the photovoltaic module, it is uniformly referred to as the position with the electrode assembly.It is best to set a mechanical correction mechanism 410 to correct the position of the photovoltaic module when the photovoltaic module reaches the pre-positioned position. In the field of photovoltaic module laminating machine technology, photovoltaic module correction devices are commonly used devices with various structures, all of which can be applied to the solution of this patent. In this patent, the following structure is adopted to simplify the structure, such as. Figure 4 As shown, each mechanical correction mechanism includes a correction drive 411, a guide wheel 412 and a correction frame 413. A guide wheel 412 is rotatably set at both ends of the correction frame 413. The correction frame is fixedly connected to the output end of the correction drive. A pair of correction mechanisms are correspondingly set for each photovoltaic module. The two correction mechanisms are respectively set at the two ends of the beam and are relatively set. The length direction of the correction frame is parallel to the X-axis. The output ends of the two correction drives are set facing each other. The four guide wheels form a retractable rectangle. The positions of the two correction mechanisms are relatively fixed. The correction drive is fixed on the frame. The correction mechanism corrects the position of the photovoltaic module that deviates from the direction of movement to a predetermined position. A cylinder is used as the correction drive. Since the photovoltaic modules are generally arranged in a line along the running direction when they are transmitted, the photovoltaic modules can be corrected to the predetermined position by only adjusting the position of the photovoltaic modules in the Y-axis direction. The electrode module lifting device can also use a servo lifting drive device.

[0038] like Figure 3 and Figure 6 As shown, it is best to set up a visual system 450 to identify and compare the position of the injected electrode sheet on each discharged photovoltaic module. The visual system includes a camera 451 as an imaging device, a camera bracket 452, and a light source 453. The camera is fixedly arranged above the discharge transmission device 210 through the camera bracket. The lens 454 of the camera faces the predetermined position of the photovoltaic module. The control system controls the robot assembly driving actions according to the position of the injected electrode sheet on the photovoltaic module collected by the camera, so that the electrode probe is aligned and contacted with the injected electrode sheet 120. In the structure of the utility model, each group of electrode assemblies is linked. Therefore, as long as one camera is used to detect and identify the position of the injected electrode sheet of the photovoltaic module, the electrode probe on one side can be aligned with the injected electrode sheet, and the electrode probe on the other side can be aligned with the injected electrode sheet on the same side. In this device, a camera can also be set corresponding to each electrode assembly, and the position of the two opposite sides of the photovoltaic assembly can be detected. The two electrode assemblies are respectively provided with a Y-axis drive, which can increase the accuracy of the alignment. The busbar on the photovoltaic module can be directly used as the injected electrode sheet.

[0039] It can be that one robot is used to assemble multiple pairs of electrode assemblies, and each photovoltaic module is equipped with a pair of electrode assemblies. The same robot is used to assemble and drive all electrode assemblies to move synchronously on the X-axis and Y-axis to align with the injection electrode sheets set on each photovoltaic module. This structure is called a linkage electric injection mechanism. This structure requires that the stopping position of the photovoltaic module is relatively accurate, otherwise the electrodes and electrode sheets are prone to misalignment. It can also be like Figure 1 and 3As shown, multiple manipulator assemblies are set up, each manipulator assembly is equipped with a pair of electrode assemblies, and each photovoltaic module is equipped with a manipulator assembly and a pair of electrode assemblies. This structure is called a single-machine electrical injection mechanism. A single-machine electrical injection mechanism is set up for each photovoltaic module. For example, when electrical injection is implemented for 7 photovoltaic modules, 7 single-machine electrical injection mechanisms are set up and used in conjunction with the discharge transmission device. The manipulator assembly of each single-machine electrical injection mechanism drives its electrode assembly to move so that the position of the electrode assembly is relative to the predetermined position of the photovoltaic module. During electrical injection, the probe of each single-machine electrical injection mechanism performs electrical injection for the photovoltaic module at the corresponding position. The drive of the manipulator assembly of each single-machine electrical injection mechanism is electrically connected to the control system respectively, and the 7 single-machine electrical injection mechanisms can implement electrical injection at the same time under the control of the control system. The use of a single-machine electric injection mechanism to implement electric injection for multiple photovoltaic modules at the same time can implement electric injection at the same time after the photovoltaic modules are discharged. It can shorten the downtime of the discharge transmission device, make the downtime match the lamination rhythm of the laminating host, and complete the electric injection of the previous batch of photovoltaic modules discharged while the laminating host is laminating and curing, without affecting the entire production rhythm. Since the transmission speed of the discharge transmission device is very high, the time difference between the photovoltaic modules at the front and the photovoltaic modules at the back leaving the lamination cavity is very short, generally about 10 seconds per photovoltaic module. Therefore, the temperature difference between the front and the last photovoltaic modules is the key factor affecting the effect of electric injection in this technical solution. Therefore, in order to achieve a better effect of electric injection, it is also necessary to increase the discharge speed and discharge transmission speed of the photovoltaic modules to keep the temperature drop of the photovoltaic modules as low as possible. Another technical solution to control the temperature drop of photovoltaic modules is to reduce the influence of the cooling unit on the temperature of the photovoltaic modules. When the cooling unit adopts a cooling platform for cooling, the electric injection unit can be set separately from the cooling unit. For example, the cooling unit is set behind the electric injection unit, and the electric injection unit is an independent unit located above the rack of the discharging unit, and the cooling unit is independently provided with a photovoltaic module conveying device. In this way, when the photovoltaic module is transmitted out of the lamination cavity through the discharging transmission device, the cooling platform is no longer provided under the discharging transmission component of the discharging transmission device, and the cooling medium will not affect the temperature of the photovoltaic module. After the electric injection is completed, the photovoltaic module is transmitted to the photovoltaic module conveying component of the cooling unit by the discharging transmission device. However, the use of this structure will increase the length of the entire electric injection photovoltaic module packaging equipment and increase the floor space. Another structure is to add a pin mechanism to the cooling unit, the pin of the pin mechanism is connected to the output end of the pin drive device, the top of the pin passes through a through hole set on the cooling platform, the top of the pin is located above the transmission platform, the lower end of the pin and the pin drive device are both located below the cooling platform, a plurality of pins are arranged so that the pins are densely distributed, and the discharge transmission component uses high-temperature cloth. When the photovoltaic module is delivered to the position, the high-temperature cloth is lifted up by the pin, so that the photovoltaic module is lifted up and then electricity is injected. During the electricity injection process, the influence of the low temperature of the cooling platform is minimized.Another structure is that the cooling platform is still a part of the discharging unit, and a high-temperature cloth transmission device is used as a discharging transmission device to transmit the laminated and cured photovoltaic modules. The high-temperature cloth is arranged around the cooling platform, and the cooling platform is used as a mechanism to support the high-temperature cloth. The exchange time of the cooling medium in the cooling platform is controlled by the control system. After the photovoltaic module is cooled, the cooling medium is not exchanged first. At this time, the cooling medium temperature rises due to heat absorption. After the discharging unit receives the photovoltaic module transmitted from the lamination chamber, it performs electrical injection on the photovoltaic module. At this time, the cooling medium is at the highest temperature. After the electrical injection is completed, the control system controls the cooling unit to circulate the cooling medium and fill the cooling medium into the cooling platform, so that the heated cooling medium returns to the cooling machine, and the cold low-temperature medium is sent to the cooling platform to complete the cooling medium exchange. In this way, when the photovoltaic module is electrically injected, the temperature of the cooling platform is at the highest temperature, reducing the temperature drop of the photovoltaic module.

[0040] Preferably, each electric injection mechanism is equipped with a power supply, the two groups of electrodes of each electric injection mechanism are respectively connected to the power supply, and the control switch of the power supply is electrically connected to the control system.

[0041] like Figure 8 As shown, in the utility model, the discharging unit can adopt a multi-layer stacked discharging platform. It includes a discharging transmission device with multiple layers of independent transmission, each layer of the discharging transmission device is respectively provided with a manipulator assembly, each electrode assembly of the manipulator assembly corresponds to the expected stop position of the photovoltaic module, and the electric injection mechanism of each layer is respectively connected to the control system, and the control system is respectively electrically connected to the X-axis servo drive device, Y-axis servo drive device and servo drive device of each layer of the manipulator assembly, and the X-axis servo drive device, Y-axis servo drive device and Z-axis drive device of each layer of the manipulator assembly are respectively controlled to move, and the photovoltaic modules located on each layer of the discharging transmission device are electrically injected, and the control system controls the electric injection of the photovoltaic modules of each layer separately or synchronously. When each layer of photovoltaic modules is controlled individually, the discharged photovoltaic modules can be electrically injected in time to reduce temperature drop, realize a fast electrical injection process, and control the feeding and discharging time in real time. The injected modules can proceed to the next process according to the process rhythm. When each layer of photovoltaic modules is electrically injected synchronously, each layer of modules can use the same set of electrical injection parameters, so that the modules can be compared horizontally under the same conditions. At the same time, synchronous injection of modules facilitates process parameter control and overall coordination, thereby improving the overall production efficiency of modules.

Claims

1. An electric injection photovoltaic module packaging device, comprising a lamination curing unit and a discharging unit, characterized in that: The discharging unit includes a discharging transmission device composed of a discharging transmission component and a discharging transmission driving mechanism. The discharging transmission driving mechanism drives the discharging transmission component to receive the photovoltaic module and transmit the photovoltaic module to a predetermined position. The discharging unit also includes an electric injection unit. The electric injection unit is located outside the lamination and curing unit, including a robot assembly and an electrode assembly. The electrode assembly includes an electrode and an insulating mounting plate. The electrode is connected to the output end of the robot assembly through the insulating mounting plate. The robot assembly drives the electrode assembly to move so that the electrode docks and presses the injection electrode sheet of the photovoltaic module, thereby implementing electric injection or leaving the injection electrode sheet to terminate electric injection. After the photovoltaic module is transmitted from the hot cavity of the lamination and curing unit and transmitted to the predetermined position, electric injection is implemented on the photovoltaic module.

2. The electric injection type photovoltaic module packaging device according to claim 1, characterized in that: It also includes a mechanical correction mechanism, by which the photovoltaic assembly on the discharge transmission device is corrected to a predetermined position. The manipulator assembly includes an X-axis servo drive mechanism, a Y-axis servo drive and a Z-axis lifting drive mechanism. The X-axis servo drive mechanism drives the electrode assembly to move along the X-axis, and the Y-axis servo drive mechanism drives the electrode assembly to move along the Y-axis so that the electrode assembly is aligned with the injection electrode sheet on the photovoltaic assembly. The Z-axis lifting drive mechanism drives the electrode assembly to move along the Z-axis so that the probe of the electrode assembly presses the injection electrode sheet to implement electrical injection.

3. The electric injection type photovoltaic module packaging device according to claim 2, characterized in that: The manipulator assembly also includes a crossbeam arranged along the Y-axis, the crossbeam spans above the cooling platform and is perpendicular to the X-axis direction, the Y-axis servo drive mechanism is fixedly arranged on the crossbeam, and its output end is fixedly connected to the X-axis servo drive mechanism to drive the X-axis servo drive mechanism to move along the Y-axis direction, the support beam is arranged along the X-axis direction, the output end of the X-axis servo drive mechanism is connected to two Z-axis lifting drive mechanisms, a slide rail is arranged on the support beam along the X-axis direction, the Z-axis lifting drive mechanism is slidably connected to the support beam through the slide rail and the slider, the output end of the Z-axis lifting drive mechanism is fixedly connected to the electrode assembly, and also includes a cooling unit, the cooling unit includes a cooling platform, the discharge transmission device is a high-temperature cloth transmission device, the high-temperature cloth is a transmission component of the discharge transmission device, the high-temperature cloth is arranged around the cooling platform, a cooling medium channel is arranged in the cooling platform, a cooling medium channel is arranged in the cooling medium channel, and the cooling medium channel is used to communicate with the cooler, thereby completing the exchange of the cooling medium; and / or the Z-axis lifting drive mechanism is a servo drive mechanism or a cylinder or an electric cylinder.

4. The electric injection photovoltaic module packaging device according to claim 1, characterized in that: The electrode assembly includes an electrode and an insulating mounting plate. The electrode is arranged below the insulating mounting plate, one end of the electrode passes through the insulating mounting plate and is connected to a locking nut, and the other end is provided with a probe, and a spring is provided between the insulating mounting plate and the probe.

5. The electric injection photovoltaic module packaging device according to claim 2, characterized in that: It also includes a visual system, which includes a camera and a camera bracket. The camera is set on the crossbeam through the camera bracket. The camera lens is set corresponding to the predetermined position of the photovoltaic component and is aligned with the predetermined stop position of the photovoltaic component. The visual system obtains the position of the injection electrode sheet after the photovoltaic component is corrected through the camera, and calculates the distance between the injection electrode sheet and the electrode assembly. The robot assembly moves the electrode assembly according to the calculated distance so that the electrode can be pressed onto the injection electrode sheet.

6. The electric injection type photovoltaic module packaging device according to claim 2, characterized in that: A robot assembly is correspondingly arranged for each photovoltaic module, and the servo drive of each robot assembly is connected to the output electrical signal of the control system, and the control system controls the synchronous movement of each robot assembly.

7. The electric injection type photovoltaic module packaging device according to claim 1, characterized in that: The discharging unit comprises a multi-layer photovoltaic module discharging transmission device, and the discharging transmission components of each photovoltaic module discharging transmission device are arranged in the upper and lower layers. Each layer of photovoltaic module discharging transmission device is respectively provided with a corresponding robot assembly, and the robot assembly of each layer is connected with the control system by electrical signals, and the control system controls the synchronous movement of the robot assembly of each layer; or each layer of the robot assembly is respectively provided with a sub-control system, and the sub-control system controls the synchronous movement of the robot assembly of each layer.

8. The electric injection photovoltaic module packaging device according to claim 3, characterized in that: After the photovoltaic components have completed lamination and curing and before the cooling step, the photovoltaic components are electrically injected. After the photovoltaic components are discharged from the lamination cavity, the photovoltaic components are electrically injected immediately. After the electrical injection, the photovoltaic components are cooled.

9. The electric injection photovoltaic module packaging device according to claim 1, characterized in that: After all the photovoltaic modules laminated once are discharged from the lamination chamber and in place, electricity is injected into the discharged photovoltaic modules at the same time.

10. The electric injection photovoltaic module packaging device according to claim 3, characterized in that: A cooling platform with cooling medium passing through it is used as a supporting platform during electricity injection. After electricity injection into the photovoltaic module is completed, the cooling medium is used to replace the medium that absorbs heat during the cooling process.

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