Packaging device based on photovoltaic cell and packaging method thereof

Abstract

The invention relates to the technical field of photovoltaic cell packaging, and discloses a packaging device based on photovoltaic cells and a packaging method thereof.The packaging device comprises a lower box and an upper box, a heat-conducting packaging table is arranged on the upper side of the interior of the lower box, and heating plates capable of horizontally moving are arranged on the upper side and the lower side of the packaging table; according to the packaging device based on the photovoltaic cells and the packaging method of the packaging device based on the photovoltaic cells, the extrusion belt is arranged above the packaging table, the first extrusion rods and the second extrusion rods are matched, inclined extrusion acting force is generated on the surfaces of the photovoltaic cell assemblies, and therefore the photovoltaic cell assemblies can be packaged, and the packaging efficiency is improved. According to the device, a plurality of extrusion and bubble removal treatment is carried out on a heated photovoltaic battery piece so as to improve the bubble removal effect in a photovoltaic battery piece assembly, and meanwhile, the battery piece in the device can be prevented from shifting by controlling the alternate movement mode and the movement driving acting force direction of the first extrusion rod and the second extrusion rod.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cell packaging, and in particular to a packaging device based on photovoltaic cells and a packaging method thereof. Background Art

[0002] Photovoltaic cells are a type of solar cell made from monocrystalline silicon, polycrystalline silicon or amorphous silicon. After the photovoltaic cells are produced, they need to be packaged and assembled to form solar modules. Solar modules are generally composed of glass, cells and back panels. EVA materials are used to bond and fix the cells to the glass and back panels. The packaging process of solar modules mainly includes single welding, string welding, stacking, vacuuming, lamination, trimming, framing, and bonding junction boxes.

[0003] When the solar panels are laminated and packaged, the solar panels need to be heated, and the EVA layer in the solar panels melts due to the heat. At this time, bubbles may remain in the solar panels. If the bubbles are not removed, it will directly affect the performance of the photovoltaic cells. Traditional photovoltaic cell lamination equipment removes internal bubbles by applying pressure when the EVA layer is in a molten state. The bubble removal effect in solar cells is limited. At the same time, in the process of removing bubbles, the cells in the solar panels are easily shifted, which will directly affect the quality of the solar panel packaging. At the same time, the lamination equipment directly heats the solar panel as a whole, and then removes the bubbles, and then performs lamination and cooling treatment. The entire process of solar panel lamination is relatively complicated and time-consuming. Summary of the invention

[0004] In order to solve the problems that the above-mentioned traditional photovoltaic cell laminating equipment has poor bubble removal effect, and the cell in the solar module is easily displaced during the bubble removal process, and the whole process of the traditional laminating equipment for the solar module lamination process is relatively complicated and time-consuming, the present invention is implemented through the following technical scheme: a packaging device based on photovoltaic cells, including a lower box and an upper box, the upper side of the lower box is provided with a heat-conducting packaging table, both sides of the packaging table are provided with conveying rollers, and both sides of the upper box are provided with a packaging inlet and a packaging outlet, respectively, the upper and lower sides of the packaging table are provided with a heating plate that can move horizontally, and the heating plate is installed with a heating wire, and the lower box and the upper box are provided with a horizontal threaded rod, the threaded rod is distributed on both sides of the heating plate, and is threadedly connected to the heating plate, and the upper and lower sides of the packaging table are provided with two groups of heating plates, and the two groups of heating plates on the same side are heated and moved from the middle of the packaging table to both sides;

[0005] The interior of the upper box is provided with vertical plates on both sides along the conveying direction of the photovoltaic cell assembly, and side support plates are installed on the inner sides of the two vertical plates. An extrusion belt is provided between the two side support plates, and the extrusion belt is located above the packaging platform. The extrusion belt is provided with an extrusion rod 1 and an extrusion rod 2 on the side away from the packaging platform;

[0006] The extrusion belt is squeezed toward the surface of the photovoltaic cell assembly by using the extrusion rod one and the extrusion rod two. The extrusion rod one and the extrusion rod two are alternately moved toward the heating direction of the heating plate. The movement of the two extrusion rods can be used to discharge the bubbles remaining inside the photovoltaic cell assembly. When one of the two extrusion rods moves, the other extrusion rod generates a force component on the photovoltaic cell assembly through the extrusion belt that is opposite to the movement direction of the extrusion rod, so as to avoid displacement of the cells in the photovoltaic cell assembly during exhaust.

[0007] Furthermore, a mounting box is slidably mounted on the lower surface of the side support plate, a moving mechanism is mounted on the upper surface of the mounting box, the moving mechanism includes an electric drive wheel, a linear motor (this part can be realized using existing technology), both ends of the extrusion rod 1 and the extrusion rod 2 are mounted inside the mounting box on the corresponding side, the extrusion rod 1 is fixedly connected to the mounting box, and the extrusion rod 2 is horizontally slidably connected to the mounting box;

[0008] The surface of the first extrusion rod located at one end of the installation box is rotatably mounted with a linkage rod 1, and the surface of the second extrusion rod located at one end of the installation box is rotatably mounted with a linkage rod 2, and the linkage rod 1 and the linkage rod 2 are rotatably connected through a shaft rod;

[0009] A retractable locking rod is installed on the surface of the installation box and the end of the second extrusion rod, and a locking hole matching the locking rod is opened on the surface of the packaging platform;

[0010] When one of the squeezing rods moves, the other squeezing rod is fixed to the packaging platform by the cooperation between the locking rod and the corresponding locking hole.

[0011] Furthermore, a driving assembly is provided inside the installation box, and the driving assembly is used to press down the shaft rod, at which time the second extrusion rod and the packaging platform are in a fixed state, and the driving assembly is used to apply opposing forces to the surfaces of the first linkage rod and the second linkage rod to reduce the angle between the first linkage rod and the second linkage rod, at which time the first extrusion rod and the packaging platform are in a fixed state;

[0012] The driving assembly includes a slide plate and a bidirectional telescopic rod;

[0013] The slide plate is installed inside the installation box so as to slide up and down. A horizontal slide groove is provided on the surface of the slide plate, and the slide groove is matched with the shaft rod. The slide plate is driven by a telescopic rod installed inside the installation box, and the telescopic rod is an electric telescopic rod or a hydraulic telescopic rod.

[0014] The bidirectional telescopic rod is installed between the first linkage rod and the second linkage rod. The bidirectional telescopic rod is an electric telescopic rod or a hydraulic telescopic rod.

[0015] Furthermore, a slide is installed inside the vertical plate to slide up and down, and the slide is driven to move by a screw installed in the vertical plate. The side support plate is fixedly installed at the lower end of the slide, and a slider is installed inside the slide to slide up and down, and the slider is driven to move by a screw installed in the slide, and an adjusting roller is installed between the sliders on both sides;

[0016] The extrusion belt is a closed belt, and a fixed plate is fixedly installed between the two ends of the two side support plates. Two upper and lower guide rollers are arranged on the outer side of the fixed plate, and the extrusion belt is supported by the adjusting roller and the guide roller.

[0017] Furthermore, a pressing plate group consisting of a plurality of pressing plate units is provided between the two side support plates, the pressing plate units are connected to the side support plates in an upward and downward sliding manner, the pressing plate units in the pressing plate group are sequentially distributed along the heating movement direction of the heating plate, and the pressing plate units are distributed above the packaging station. After exhausting by using the first and second extrusion rods, the pressing plate units at the corresponding positions press the photovoltaic cell sheet assembly through the extrusion belt;

[0018] A connecting groove is provided on one side of the pressing plate unit in the same pressing plate group, and a connecting block is fixedly installed on the other side. The connecting block is located in the connecting groove on the side surface of the adjacent pressing plate unit, and the upper and lower widths of the connecting groove are adapted to the moving stroke of the pressing plate unit.

[0019] Furthermore, a walking type pressing assembly is arranged above the pressing plate group. After one of the pressing plate units in the pressing plate group is pressed downward by the walking type pressing assembly, the walking type pressing assembly is continued to be used to press the next pressing plate unit downward along the moving direction of the heating plate. Before the next pressing plate unit is pressed, the previous pressing plate unit always keeps the pressing state.

[0020] The walking type clamping assembly comprises two rotating rods, two sets of mounting rods and two sets of walking pressure strips, and the walking pressure strips are provided with counterweight blocks;

[0021] The two rotating rods are respectively installed on the inner surface of the two side support plates, the two groups of mounting rods are rotatably installed between the two rotating rods, the two groups of mounting rods are distributed at both ends of the central axis of the rotating rods, and the two groups of walking pressure strips are fixedly installed under the corresponding installation rods through connecting plates. Ball bearings are provided on the lower surface of the walking pressure strips, and the ball bearings are used to reduce the horizontal resistance between the walking pressure strips and the surface of the pressure plate unit;

[0022] A motor module is installed at one end of the mounting rod close to the rotating rod. The motor module is used to drive the rotating rod to rotate relative to the mounting rod, so that the two groups of walking pressure strips can be moved alternately in the direction of heating and moving of the heating plate.

[0023] A reset spring is arranged between the pressure plate unit and the side support plate, or a reset driving member is arranged for the first pressure plate unit that moves downward in the pressure plate group, or a synchronous reset driving member is arranged for several pressure plate units in the pressure plate group, so as to realize the upward reset of the pressure plate unit.

[0024] Furthermore, the inner surface of the side support plate is provided with a guide groove composed of a plurality of semicircular guide grooves and a linear initial groove, the plurality of guide grooves are connected in sequence, the radius of the guide groove is the same as the radius of rotation of the central axis of the rotating rod relative to the mounting rod, the initial groove is connected with an end of the guide groove close to the center of the side support plate, the guide groove and the initial groove are adapted to the central axis of the rotating rod, when the central axis of the rotating rod slides in the guide groove, the inner wall of the guide groove exerts an extrusion force on the central axis, and the direction of the extrusion force points to the mounting rod along the rod body of the rotating rod;

[0025] An adjustment plate is installed in the cavity inside the side support plate so as to slide up and down. A horizontal slide groove is provided inside the adjustment plate. The central axis of the rotating rod extends into the slide groove. The adjustment plate is driven to move by a hydraulic rod installed inside the side support plate. The adjustment plate is used to adjust the position of the central axis of the rotating rod in the initial groove. At the same time, it is used to apply a force to the surface of the central axis and transmit the force to the surface of the mounting rod through the rotating rod.

[0026] Furthermore, a liquid inlet pipe and a liquid outlet pipe are respectively provided on both sides of the width direction of the corresponding section of the extrusion belt and the packaging station, and the liquid inlet pipe and the liquid outlet pipe are connected to the circulating coolant tank through a connecting pipe, and a cooling pipe is installed between the liquid inlet pipe and the liquid outlet pipe, and the two ends of the cooling pipe are respectively connected to the liquid inlet pipe and the liquid outlet pipe;

[0027] A plurality of U-shaped portions of the cooling pipeline near the liquid outlet pipe are provided with branch joints on their surfaces, the branch joints are connected to the liquid outlet pipe, a control valve is provided between the branch joint and the U-shaped portion of the cooling pipeline, and the control valve is used to control the opening and closing of the branch joint and the cooling pipeline. When the branch joint is connected to the cooling pipeline, the U-shaped portion of this portion is disconnected from the cooling pipeline, and when the branch joint is disconnected from the cooling pipeline, the U-shaped portion of this portion is connected to the cooling pipeline;

[0028] A plurality of pressure sensors are sequentially arranged inside the corresponding sections of the extrusion belt and the packaging table along the heating movement direction of the heating plate. The plurality of pressure sensors are electrically connected to the corresponding control valves, respectively. A delay module is arranged at the signal control end of the pressure sensor, and the delay module is utilized to delay control the opening and closing of the control valve.

[0029] Furthermore, an extrusion belt is also provided below the packaging platform, and a pressing plate group is also provided on the side of the extrusion belt away from the packaging platform.

[0030] A method for packaging a photovoltaic cell comprises the following specific steps:

[0031] S1, placing the photovoltaic cell assembly to be packaged on the surface of the packaging table, and using the heat generated by the heating plate to perform mobile heating on the photovoltaic cell assembly;

[0032] S2, using the extrusion rod 1 and the extrusion rod 2 to extrude the heated section on the surface of the photovoltaic cell assembly;

[0033] S201, using the driving assembly to alternately control the squeezing rod 1 and the squeezing rod 2 to move along the heating moving direction of the heating plate to remove bubbles inside the photovoltaic cell assembly;

[0034] S202, using the force applied by the squeezing rod 1 and the squeezing rod 2 on the surface of the photovoltaic cell assembly to prevent the cell in the photovoltaic cell assembly from shifting;

[0035] S3, using two groups of walking pressure strips in the walking pressure assembly to alternately push the pressure plate unit downward along the heating movement direction of the heating plate, and using the pressure plate unit to press and fix the exhausted photovoltaic cell assembly;

[0036] S4. The coolant is transported to the cooling pipe. Under the action of the control valve, the coolant flows through the inner section of the extruded belt corresponding to the photovoltaic cell assembly that can cool down the temperature, so as to cool down the photovoltaic cell assembly.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The packaging device and packaging method based on photovoltaic cells, by arranging an extrusion belt above the packaging table, and using the cooperation of the extrusion rod 1 and the extrusion rod 2, an inclined extrusion force is generated on the surface of the photovoltaic cell assembly, so as to realize multiple extrusion and bubble removal treatment of the heated photovoltaic cell, so as to improve the removal effect of bubbles in the photovoltaic cell assembly. At the same time, by controlling the alternating movement mode and the movement driving force direction of the extrusion rod 1 and the extrusion rod 2, the displacement of the cells inside the photovoltaic cell assembly can be avoided while the bubbles are removed from the photovoltaic cell assembly, so as to ensure the packaging effect of the photovoltaic cell assembly.

[0039] 2. The packaging device based on photovoltaic cells and the packaging method thereof are provided with movable heating plates on the upper and lower sides of the packaging platform, and while using the extrusion rods 1 and 2 to perform air bubble treatment on the photovoltaic cell assembly, the pressure plate unit is used to press and fix the photovoltaic cell assembly that has been degassing, and by controlling the flow area of ​​the coolant inside the extrusion belt, the coolable section in the photovoltaic cell assembly is cooled and cooled simultaneously, thereby realizing the collaborative operation of multiple processes, which is beneficial to shortening the lamination processing time of the photovoltaic cell assembly and improving the efficiency of the lamination packaging of the photovoltaic cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a three-dimensional diagram of the overall structure of the packaging device of the present invention;

[0041] Figure 2 A three-dimensional diagram of the internal structure of the packaging device of the present invention;

[0042] Figure 3 This is a front view of the internal structure of the packaging device of the present invention;

[0043] Figure 4 It is a three-dimensional diagram of the related structures of the side support plate, the adjusting roller and the extrusion belt of the present invention;

[0044] Figure 5 This is a three-dimensional diagram of the structure distribution inside the extrusion belt of the present invention;

[0045] Figure 6 This is a front view of the structure distribution inside the extrusion belt of the present invention;

[0046] Figure 7 It is a three-dimensional diagram of the combined structure of the extrusion rod 1 and the extrusion rod 2 and the installation box of the present invention;

[0047] Figure 8 It is a three-dimensional diagram of the combined structure of the extrusion rod 1 and the extrusion rod 2 and the driving assembly of the present invention;

[0048] Fig. 9 This is a front view of the matching structure of the extrusion rod 1 and the extrusion rod 2 and the driving assembly of the present invention;

[0049] Fig.10 It is a schematic diagram of the structure of the pressing plate unit of the present invention;

[0050] Fig.11 The invention provides a three-dimensional structure of the combined structure of the rotating rod, the mounting rod, the walking layer and the side support plate. Figure 1 ;

[0051] Fig.12 The invention provides a three-dimensional structure of the combined structure of the rotating rod, the mounting rod, the walking layer and the side support plate. Figure 2 ;

[0052] Fig.13 It is a schematic diagram of the structure in the inner cavity of the side support plate of the present invention;

[0053] Fig.14 This is a schematic diagram of the internal cooling pipeline distribution structure of the extrusion belt of the present invention;

[0054] Fig.15 For the present invention Fig.14 A schematic diagram of the enlarged structure at A in the middle;

[0055] In the figure: 1, lower box; 2, packaging table; 3, upper box; 31, packaging inlet; 32, packaging outlet; 4, heating plate; 5, vertical plate; 51, slide seat; 52, slide block; 6, adjusting roller; 7, side support plate; 71, guide groove; 72, initial groove; 73, adjusting plate; 74, hydraulic rod; 8, fixed plate; 81, guide roller; 9, extrusion belt; 91, liquid inlet pipe; 92, cooling pipe; 921, branch joint; 93, liquid outlet Tube; 10, installation box; 101, extrusion rod one; 102, linkage rod one; 103, extrusion rod two; 104, linkage rod two; 105, locking rod; 11, slide plate; 111, two-way telescopic rod; 12, pressure plate unit; 121, connecting block; 122, connecting groove; 13, rotating rod; 131, installation rod; 132, walking pressure strip; 133, motor module; 14, circulating coolant tank; 100, photovoltaic cell assembly. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] The embodiments of the packaging device based on photovoltaic cells and the packaging method thereof are as follows:

[0058] See also Figure 1-Figure 15A packaging device based on photovoltaic cells, the packaging device is applied to the packaging of photovoltaic cell modules 100, wherein the photovoltaic cell modules 100 are composed of a glass layer, an EVA layer, a battery layer, an EVA layer, a glass fiber layer and a backplane layer from top to bottom, the packaging device comprises a lower box 1 and an upper box 3, a heat-conducting packaging table 2 is arranged on the upper side of the lower box 1, conveying rollers are arranged on both sides of the packaging table 2, and a packaging inlet 31 and a packaging outlet 32 ​​are respectively arranged on both sides of the upper box 3 for feeding and outputting the photovoltaic cell modules 100.

[0059] A horizontally movable heating plate 4 is provided on the upper and lower sides of the packaging table 2. A heating wire is installed inside the heating plate 4, and the heating wire is connected to a power source. The EVA layer in the photovoltaic cell assembly 100 is heated by the heating plate 4. Horizontal threaded rods are provided inside the lower box 1 and the upper box 3. The threaded rods are driven to rotate by a motor. The threaded rods are distributed on both sides of the heating plate 4 and are threadedly connected to the heating plate 4 to control the horizontal movement of the heating plate 4. Two groups of heating plates 4 are provided on the upper and lower sides of the packaging table 2. The two groups of heating plates 4 on the same side heat and move from the middle of the packaging table 2 to both sides.

[0060] Vertical plates 5 are provided on both sides of the upper box 3 along the conveying direction of the photovoltaic cell assembly 100, and side support plates 7 are installed on the inner sides of the two vertical plates 5. A slide 51 is installed inside the vertical plates 5 to slide up and down, and the slide 51 is driven to move by a screw installed in the vertical plates 5. The side support plates 7 are fixedly installed at the lower end of the slide 51, and a slider 52 is installed inside the slide 51 to slide up and down, and the slider 52 is driven to move by a screw installed in the slide 51, and an adjusting roller 6 is installed between the sliders 52 on both sides.

[0061] An extrusion belt 9 is arranged between the two side support plates 7. The extrusion belt 9 is a closed belt. A fixed plate 8 is fixedly installed between the two ends of the two side support plates 7. Two upper and lower guide rollers 81 are arranged on the outer side of the fixed plate 8. The extrusion belt 9 is supported by the adjusting roller 6 and the guide roller 81. The position of the adjusting roller 6 is controlled by the slider 52 to ensure the surface tension of the extrusion belt 9.

[0062] The extrusion belt 9 is located above the packaging platform 2 , and an extrusion rod 101 and an extrusion rod 2 103 are provided on a side of the extrusion belt 9 away from the packaging platform 2 .

[0063] An installation box 10 is slidably installed on the lower surface of the side support plate 7, and a moving mechanism, such as an electric drive wheel, is installed on the upper surface of the installation box 10 for resetting the installation box 10 (this part can be implemented using existing technology and is not shown in the figure). Both ends of the extrusion rod 101 and the extrusion rod 2 103 are installed inside the installation box 10 on the corresponding side, the extrusion rod 101 is fixedly connected to the installation box 10, and the extrusion rod 2 103 is horizontally slidably connected to the installation box 10.

[0064] The surface of the extrusion rod 101 located at one end inside the installation box 10 is rotatably mounted with a linkage rod 102, and the surface of the extrusion rod 103 located at one end inside the installation box 10 is rotatably mounted with a linkage rod 104. The linkage rod 102 and the linkage rod 104 are rotatably connected via an axle rod.

[0065] A retractable locking rod 105 is installed on the surface of the mounting box 10 and the end of the second squeezing rod 103, and a locking hole matching the locking rod 105 is opened on the surface of the packaging table 2; when one squeezing rod moves, the other squeezing rod uses the cooperation between the locking rod 105 and the corresponding locking hole to keep it in a fixed state with the packaging table 2.

[0066] A driving component is provided inside the mounting box 10, and the driving component is used to press down the shaft rod. At this time, the extrusion rod 103 and the packaging table 2 are in a fixed state. When the driving component presses down the shaft rod, the linkage rod 102 pushes the extrusion rod 101 to move, and at the same time, the linkage rod 104 generates a force on the extrusion rod 103. The component of this force in the horizontal direction is opposite to the moving direction of the extrusion rod 101. The driving component is used to apply opposite forces to the surfaces of the linkage rod 102 and the linkage rod 104 to reduce the angle between the linkage rod 102 and the linkage rod 104. At this time, the extrusion rod 101 and the packaging table 2 are in a fixed state. In this process, the linkage rod 104 drives the extrusion rod 103 to move, and the component of the force generated by the linkage rod 102 on the extrusion rod 101 in the horizontal direction is opposite to the moving direction of the extrusion rod 103. The above-mentioned force can be used to avoid displacement of the photovoltaic cell assembly 100 when venting the gas.

[0067] The driving assembly includes a slide plate 11 and a bidirectional telescopic rod 111; the slide plate 11 is installed inside the installation box 10 for sliding up and down, and a horizontal slide groove is provided on the surface of the slide plate 11, which is adapted to the shaft rod. The slide plate 11 is driven by the telescopic rod installed inside the installation box 10, and the telescopic rod is an electric telescopic rod or a hydraulic telescopic rod.

[0068] The bidirectional telescopic rod 111 is installed between the linkage rod 102 and the linkage rod 2 104. The bidirectional telescopic rod 111 is an electric telescopic rod or a hydraulic telescopic rod. The bidirectional telescopic rod 111 is used in conjunction with the slide plate 11. When reducing the angle between the linkage rod 102 and the linkage rod 2 104, the extrusion rod 2 103 is used to exhaust the photovoltaic cell assembly 100, and the extrusion rod 1 101 is used to prevent the cell in the photovoltaic cell assembly 100 from shifting.

[0069] The extrusion belt 9 is squeezed toward the surface of the photovoltaic cell assembly 100 by using the extrusion rod 101 and the extrusion rod 103. The extrusion rod 101 and the extrusion rod 103 are alternately moved toward the heating direction of the heating plate 4. The movement of the two extrusion rods can be used to discharge the bubbles remaining inside the photovoltaic cell assembly 100, which is beneficial to improving the effect of bubble discharge. When one of the two extrusion rods moves, the other extrusion rod generates a force component on the photovoltaic cell assembly 100 through the extrusion belt 9 that is opposite to the movement direction of the above-mentioned extrusion rod, which is used to avoid displacement of the cells in the photovoltaic cell assembly 100 during exhaust.

[0070] A pressing plate group consisting of several pressing plate units 12 is provided between the two side support plates 7, and an extrusion belt 9 is also provided under the packaging table 2. A pressing plate group is also provided on the side of the extrusion belt 9 away from the packaging table 2. The pressing plate units 12 are connected to the side support plates 7 for vertical sliding. The pressing plate units 12 in the pressing plate group are distributed in sequence along the heating movement direction of the heating plate 4. The pressing plate units 12 are distributed above the packaging table 2. After exhausting by using the extrusion rod 101 and the extrusion rod 2 103, the pressing plate units 12 at the corresponding position press the photovoltaic cell assembly 100 through the extrusion belt 9, which is used to encapsulate, press and fix the photovoltaic cell assembly 100.

[0071] A connecting groove 122 is provided on one side of the pressure plate unit 12 in the same pressure plate group, and a connecting block 121 is fixedly installed on the other side. The connecting block 121 is located in the connecting groove 122 on the side surface of the adjacent pressure plate unit 12. The upper and lower widths of the connecting groove 122 are adapted to the moving stroke of the pressure plate unit 12. Along the moving direction of the heating plate 4, when the previous pressure plate unit 12 has not moved downward, the subsequent pressure plate unit 12 cannot move downward to achieve a clamping effect. In addition, when the subsequent pressure plate unit 12 moves downward to achieve a clamping effect, under the cooperation of the connecting block 121 and the connecting groove 122, the subsequent pressure plate unit 12 will generate a downward force on the previous pressure plate unit 12, thereby achieving a linkage effect between the two adjacent pressure plate units 12.

[0072] A walking pressing assembly is arranged above the pressing plate group. After one of the pressing plate units 12 in the pressing plate group is pressed downward by the walking pressing assembly, the next pressing plate unit 12 is pressed downward along the moving direction of the heating plate 4 by the walking pressing assembly. Before the next pressing plate unit 12 is pressed, the previous pressing plate unit 12 always remains in a pressed state.

[0073] The walking type clamping assembly includes two rotating rods 13, two sets of mounting rods 131 and two sets of walking pressure strips 132. The walking pressure strips 132 are provided with counterweight blocks for keeping the lower surface of the walking pressure strips 132 always parallel to the upper surface of the pressure plate unit 12.

[0074] The two rotating rods 13 are respectively installed on the inner surfaces of the two side support plates 7, and the two groups of mounting rods 131 are rotatably installed between the two rotating rods 13. The two groups of mounting rods 131 are distributed at both ends on both sides of the central axis of the rotating rod 13, and the two groups of walking pressure strips 132 are fixedly installed under the corresponding mounting rods 131 through connecting plates. Balls are provided on the lower surface of the walking pressure strips 132, and the ball bearings are used to reduce the horizontal resistance between the walking pressure strips 132 and the surface of the pressure plate unit 12, so that when the rotating rod 13 rotates toward the mounting rod 131, the walking pressure strips 132 can be horizontally moved on the surface of the pressure plate unit 12 to adjust the position of the walking pressure strips 132 relative to the pressure plate unit 12 when the pressure plate unit 12 is pressed.

[0075] A motor module 133 is installed at one end of the mounting rod 131 close to the rotating rod 13. The motor module 133 drives the rotating rod 13 to rotate relative to the mounting rod 131, so that the two groups of walking pressure strips 132 can move alternately in the direction of heating and moving of the heating plate 4.

[0076] The combined design of the walking clamping assembly and the pressure plate unit 12 structure can achieve the clamping effect of the pressure plate unit 12 inside the pressure plate group by using a group of walking clamping assemblies when multiple pressure plate units 12 are set. There is no need to set a separate driving source for each pressure plate unit 12. A reset spring can be set between the pressure plate unit 12 and the side support plate 7, or a reset driving component can be set for the first pressure plate unit 12 that moves downward in the pressure plate group, or a synchronous reset driving component can be set for several pressure plate units 12 in the pressure plate group, so as to achieve the upward reset of the pressure plate unit 12 (the reset methods of these several pressure plate units 12 are all achieved by using existing technologies).

[0077] The inner surface of the side support plate 7 is provided with a guide groove 71 composed of a plurality of semicircular guide grooves and a linear initial groove 72. The plurality of guide grooves are connected in sequence. The radius of the guide groove is the same as the radius of rotation of the central axis of the rotating rod 13 relative to the mounting rod 131. The initial groove 72 is connected to an end of the guide groove 71 close to the center of the side support plate 7. The guide groove 71 and the initial groove 72 are adapted to the central axis of the rotating rod 13. When the central axis of the rotating rod 13 slides in the guide groove, the inner wall of the guide groove exerts an extrusion force on the central axis. The direction of the extrusion force is along the rod body of the rotating rod 13 toward the mounting rod 131, so as to ensure the downward pressure of the mounting rod 131 on the walking pressure strip 132.

[0078] An adjustment plate 73 is installed in the cavity inside the side support plate 7 so as to slide up and down. A horizontal slide groove is provided inside the adjustment plate 73, and the central axis of the rotating rod 13 extends into the slide groove. The adjustment plate 73 is driven to move by a hydraulic rod 74 installed inside the side support plate 7. The adjustment plate 73 is used to adjust the position of the central axis of the rotating rod 13 in the initial groove 72, and is also used to apply a force to the surface of the central axis and transmit the force to the surface of the mounting rod 131 through the rotating rod 13.

[0079] A liquid inlet pipe 91 and a liquid outlet pipe 93 are respectively provided on both sides of the inner width direction of the corresponding section of the extrusion belt 9 and the packaging table 2. The liquid inlet pipe 91 and the liquid outlet pipe 93 are connected to the circulating coolant tank 14 through a connecting pipe. The circulating coolant tank 14 provides coolant. A cooling pipe 92 is installed between the liquid inlet pipe 91 and the liquid outlet pipe 93. The two ends of the cooling pipe 92 are respectively connected to the liquid inlet pipe 91 and the liquid outlet pipe 93.

[0080] Branch joints 921 are provided on the surfaces of several U-shaped portions on one side of the cooling pipe 92 close to the liquid outlet pipe 93. The branch joints 921 are connected to the liquid outlet pipe 93. A control valve is provided between the branch joint 921 and the U-shaped portion of the cooling pipe 92. The control valve is used to control the opening and closing of the branch joint 921 and the cooling pipe 92. When the branch joint 921 is connected to the cooling pipe 92, the U-shaped portion of this part is disconnected from the cooling pipe 92. When the branch joint 921 is disconnected from the cooling pipe 92, the U-shaped portion of this part is connected to the cooling pipe 92.

[0081] A plurality of pressure sensors are arranged in sequence inside the corresponding sections of the extrusion belt 9 and the packaging table 2 along the heating movement direction of the heating plate 4. The plurality of pressure sensors are electrically connected to the corresponding control valves respectively. A delay module is arranged at the signal control end of the pressure sensor, and the delay module is used to delay the opening and closing of the control valve.

[0082] When the pressing plate unit 12 presses the extrusion belt 9, the pressure sensor at the corresponding position senses the change in pressure and sends a signal to the control valve through the delay module after a set time length. When the control valve disconnects the branch joint 921 from the cooling pipe 92, the U-shaped part of this part is connected to the cooling pipe 92 at the same time, so that the photovoltaic cell assembly 100 can be cooled and cooled in sections. When the photovoltaic cell assembly 100 is exhaust-treated by the extrusion rod 101 and the extrusion rod 2 103, and the photovoltaic cell assembly 100 after exhaust-treatment is pressed and fixed by the pressing plate unit 12, the circulating flow position of the coolant inside the extrusion belt 9 is controlled, and the position of the photovoltaic cell assembly 100 that can be cooled after being pressed and fixed is cooled and cooled, which is beneficial to shorten the packaging process time of the photovoltaic cell assembly 100.

[0083] A method for packaging a photovoltaic cell comprises the following specific steps:

[0084] In the first step, the photovoltaic cell assembly 100 to be packaged is placed on the surface of the packaging table 2, and the photovoltaic cell assembly 100 is heated by movement using the heat generated by the heating plate 4; in the second step, the heated section on the surface of the photovoltaic cell assembly 100 is squeezed using squeezing rod 1 101 and squeezing rod 2 103.

[0085] The driving assembly is used to alternately control the squeezing rod 101 and the squeezing rod 2 103 to move along the heating movement direction of the heating plate 4 to remove bubbles inside the photovoltaic cell assembly 100; the force applied to the surface of the photovoltaic cell assembly 100 by the squeezing rod 101 and the squeezing rod 2 103 during squeezing is used to prevent the cells in the photovoltaic cell assembly 100 from shifting.

[0086] In the third step, two groups of walking pressure strips 132 in the walking pressure assembly are used to alternately push the pressure plate unit 12 downward along the heating movement direction of the heating plate 4, and the pressure plate unit 12 is used to press and fix the exhausted photovoltaic cell assembly 100.

[0087] The fourth step is to transport the coolant to the cooling pipe 92. Under the action of the control valve, the coolant flows through the inner section of the extrusion belt 9 corresponding to the photovoltaic cell assembly 100 that can be cooled and cooled, so as to cool and dissipate the heat of the photovoltaic cell assembly 100.

[0088] The working principle of the photovoltaic cell packaging device:

[0089] The photovoltaic cell assembly 100 to be packaged is transported to the interior of the upper box 3 through the packaging inlet 31, and the photovoltaic cell assembly 100 is placed on the surface of the packaging table 2. At this time, the heating plate 4 is located on the upper and lower sides of the middle position of the packaging table 2. The heating wire inside the heating plate 4 is connected to the power supply, and the heating plate 4 generates heat and heats the photovoltaic cell assembly 100 from the upper and lower sides. The EVA layer inside the photovoltaic cell assembly 100 is melted by the heat. When the heating plate 4 heats the photovoltaic cell assembly 100, it continuously moves toward the side direction of the photovoltaic cell assembly 100 to perform mobile heating on the photovoltaic cell assembly 100.

[0090] After the EVA layer inside the photovoltaic cell assembly 100 melts, the slide 51 is used to adjust the position of the extrusion belt 9, and the extrusion rod 101 and the extrusion rod 103 are used to extrude the surface of the photovoltaic cell assembly 100 through the extrusion belt 9. At the same time, the driving assembly is used to alternately control the extrusion rod 101 and the extrusion rod 103 to move along the heating movement direction of the heating plate 4. The movement of the extrusion rod 101 and the extrusion rod 103 will push the bubbles inside the photovoltaic cell assembly 100. The force applied to the surface of the photovoltaic cell assembly 100 by the extrusion rod 101 and the extrusion rod 103 during extrusion will not be perpendicular to the surface of the photovoltaic cell assembly 100, which is convenient for pushing the bubbles inside the photovoltaic cell assembly 100 and can avoid the displacement of the cell during exhaust.

[0091] When the extrusion rod 101 and the extrusion rod 2 103 move to exhaust, the two groups of walking pressure strips 132 in the walking pressing assembly are used to alternately push the pressing plate unit 12 downward along the heating movement direction of the heating plate 4, and the pressing plate unit 12 is used to press the exhausted photovoltaic cell assembly 100, and the molten EVA layer is used to fix the cell layer with the glass layer and the glass fiber layer.

[0092] After the pressing plate unit 12 presses the photovoltaic cell assembly 100 for a set time, the coolant in the circulating coolant tank 14 enters the liquid inlet pipe 91, and enters the cooling pipe 92 from the liquid inlet pipe 91. Under the action of the control valve, the coolant flows through the inner section of the extrusion belt 9 corresponding to the photovoltaic cell assembly 100 that can be cooled, so as to cool and dissipate the heat of the photovoltaic cell assembly 100. As the extrusion rod 101 and the extrusion rod 2 103 continue to move, and the pressing plate unit 12 continues to press the photovoltaic cell assembly 100, the flow section area of ​​the coolant in the extrusion belt 9 continues to increase until the photovoltaic cell assembly 100 is cooled and dissipated as a whole.

[0093] After cooling, the photovoltaic cell 100 is transported out of the upper box 3 through the packaging outlet 32 ​​.

[0094] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A packaging device based on photovoltaic cells, comprising a lower box (1) and an upper box (3), characterized in that: A heat-conducting packaging platform (2) is provided on the upper side of the interior of the lower box (1), and heating plates (4) that can move horizontally are provided on both the upper and lower sides of the packaging platform (2); The interior of the upper box (3) is provided with vertical plates (5) on both sides along the conveying direction of the photovoltaic cell assembly (100), and side support plates (7) are installed on the inner sides of the two vertical plates (5). An extrusion belt (9) is provided between the two side support plates (7), and the extrusion belt (9) is located above the packaging platform (2). The side of the extrusion belt (9) away from the packaging platform (2) is provided with an extrusion rod 1 (101) and an extrusion rod 2 (103); The extrusion belt (9) is extruded toward the surface of the photovoltaic cell assembly (100) by using the extrusion rod one (101) and the extrusion rod two (103); the extrusion rod one (101) and the extrusion rod two (103) are alternately moved toward the heating direction of the heating plate (4); when one of the two extrusion rods moves, the other extrusion rod generates a force component on the photovoltaic cell assembly (100) through the extrusion belt (9) in the opposite direction of the movement of the extrusion rod.

2. The photovoltaic cell packaging device according to claim 1, characterized in that: A mounting box (10) is slidably mounted on the lower surface of the side support plate (7), both ends of the first extrusion rod (101) and the second extrusion rod (103) are mounted inside the mounting box (10) on the corresponding side, the first extrusion rod (101) is fixedly connected to the mounting box (10), and the second extrusion rod (103) is horizontally slidably connected to the mounting box (10); The first extrusion rod (101) is rotatably mounted on a surface of one end of the interior of the installation box (10) with a linkage rod (102); the second extrusion rod (103) is rotatably mounted on a surface of one end of the interior of the installation box (10) with a linkage rod (104); the linkage rod (102) and the linkage rod (104) are rotatably connected via a shaft; A retractable locking rod (105) is installed on the surface of the installation box (10) and the end of the second extrusion rod (103), and a locking hole matching the locking rod (105) is opened on the surface of the packaging platform (2); When one of the squeezing rods moves, the other squeezing rod is fixed to the packaging platform (2) by means of the cooperation between the locking rod (105) and the corresponding locking hole.

3. The photovoltaic cell packaging device according to claim 2, characterized in that: The installation box (10) is provided with a driving assembly inside, and the driving assembly is used to press the shaft rod downward, at which time the second extrusion rod (103) and the packaging platform (2) are in a fixed state, and the driving assembly is used to apply opposing forces to the surfaces of the first linkage rod (102) and the second linkage rod (104), thereby reducing the angle between the first linkage rod (102) and the second linkage rod (104), and at this time the first extrusion rod (101) and the packaging platform (2) are in a fixed state; The driving assembly comprises a slide plate (11) and a bidirectional telescopic rod (111); The slide plate (11) is installed inside the installation box (10) in a manner of sliding up and down, a horizontal slide groove is provided on the surface of the slide plate (11), the slide groove is adapted to the shaft rod, and the slide plate (11) is driven by a telescopic rod installed inside the installation box (10); The bidirectional telescopic rod (111) is installed between the first linkage rod (102) and the second linkage rod (104).

4. The photovoltaic cell packaging device according to claim 3, characterized in that: A sliding seat (51) is installed inside the vertical plate (5) so as to slide up and down, the side support plate (7) is fixedly installed at the lower end of the sliding seat (51), a sliding block (52) is installed inside the sliding seat (51) so as to slide up and down, and an adjusting roller (6) is installed between the sliding blocks (52) on both sides; The extrusion belt (9) is a closed belt. A fixed plate (8) is fixedly installed between the two ends of the two side support plates (7). Two upper and lower guide rollers (81) are provided on the outer side of the fixed plate (8). The extrusion belt (9) is supported by the adjusting roller (6) and the guide roller (81).

5. The photovoltaic cell packaging device according to claim 3 or 4, characterized in that: A pressing plate group consisting of a plurality of pressing plate units (12) is provided between the two side support plates (7), the pressing plate units (12) are connected to the side support plates (7) in an up-and-down sliding manner, the pressing plate units (12) in the pressing plate group are sequentially distributed along the heating movement direction of the heating plate (4), and the pressing plate units (12) are distributed above the packaging table (2); A connection groove (122) is provided on one side of the pressure plate unit (12) in the same pressure plate group, and a connection block (121) is fixedly installed on the other side. The connection block (121) is located in the connection groove (122) on the side surface of the adjacent pressure plate unit (12). The upper and lower widths of the connection groove (122) are adapted to the moving stroke of the pressure plate unit (12).

6. The photovoltaic cell packaging device according to claim 5, characterized in that: A walking type pressing assembly is arranged above the pressing plate group. After one of the pressing plate units (12) in the pressing plate group is pressed downward by the walking type pressing assembly, the next pressing plate unit (12) is pressed downward along the moving direction of the heating plate (4) by the walking type pressing assembly. Before the next pressing plate unit (12) is pressed, the previous pressing plate unit (12) is always kept in a pressed state. The walking type clamping assembly comprises two rotating rods (13), two groups of mounting rods (131) and two groups of walking pressure strips (132); The two rotating rods (13) are respectively installed on the inner surfaces of the two side support plates (7), the two groups of mounting rods (131) are rotatably installed between the two rotating rods (13), the two groups of mounting rods (131) are distributed at both ends of the central axis of the rotating rods (13), and the two groups of walking pressure strips (132) are fixedly installed under the corresponding mounting rods (131) through connecting plates; A motor module (133) is installed at one end of the installation rod (131) close to the rotating rod (13), and the motor module (133) is used to drive the rotating rod (13) to rotate relative to the installation rod (131).

7. The photovoltaic cell packaging device according to claim 6, characterized in that: The inner surface of the side support plate (7) is provided with a guide groove (71) composed of a plurality of semicircular guide grooves and a linear initial groove (72), the plurality of guide grooves are connected in sequence, the radius of the guide groove is the same as the radius of rotation of the central axis of the rotating rod (13) relative to the mounting rod (131), the initial groove (72) is connected to an end of the guide groove (71) close to the center of the side support plate (7), and the guide groove (71) and the initial groove (72) are adapted to the central axis of the rotating rod (13); An adjustment plate (73) is slidably mounted in the cavity inside the side support plate (7) up and down, and a horizontal slide groove is provided inside the adjustment plate (73), and the central axis of the rotating rod (13) extends into the slide groove.

8. The photovoltaic cell packaging device according to claim 7, characterized in that: A liquid inlet pipe (91) and a liquid outlet pipe (93) are respectively provided on both sides of the corresponding sections of the extrusion belt (9) and the packaging platform (2) in the width direction, a cooling pipe (92) is installed between the liquid inlet pipe (91) and the liquid outlet pipe (93), and both ends of the cooling pipe (92) are respectively connected to the liquid inlet pipe (91) and the liquid outlet pipe (93); A plurality of U-shaped portions of the cooling pipeline (92) on a side close to the liquid outlet pipe (93) are provided with branch joints (921), the branch joints (921) are connected to the liquid outlet pipe (93), and a control valve is provided between the branch joint (921) and the U-shaped portion of the cooling pipeline (92); A plurality of pressure sensors are sequentially arranged inside the corresponding sections of the extrusion belt (9) and the packaging table (2) along the heating movement direction of the heating plate (4), and the plurality of pressure sensors are electrically connected to the corresponding control valves, respectively. A delay module is arranged at the signal control end of the pressure sensor, and the delay module is used to delay the opening and closing of the control valve.

9. The photovoltaic cell packaging device and packaging method according to claim 8, characterized in that: An extrusion belt (9) is also provided below the packaging platform (2), and a pressure plate group is also provided on the side of the extrusion belt (9) away from the packaging platform (2).

10. A method for packaging a photovoltaic cell, using the packaging device based on a photovoltaic cell according to claim 9, characterized in that: The specific steps include: S1, placing the photovoltaic cell assembly (100) to be packaged on the surface of the packaging platform (2), and using the heat generated by the heating plate (4) to perform mobile heating on the photovoltaic cell assembly (100); S2, using the squeezing rod 1 (101) and the squeezing rod 2 (103) to squeeze the heated section on the surface of the photovoltaic cell assembly (100); S201, using the driving assembly to alternately control the squeezing rod 1 (101) and the squeezing rod 2 (103) to move along the heating movement direction of the heating plate (4), so as to remove bubbles inside the photovoltaic cell sheet assembly (100); S202, using the force applied to the surface of the photovoltaic cell assembly (100) by the squeezing rod 1 (101) and the squeezing rod 2 (103) during squeezing to prevent the cells in the photovoltaic cell assembly (100) from shifting; S3, using two groups of walking pressure strips (132) in the walking pressure assembly to alternately push the pressure plate unit (12) downward along the heating movement direction of the heating plate (4), and using the pressure plate unit (12) to press and fix the photovoltaic cell sheet assembly (100) after exhaust; S4, conveying the coolant to the cooling pipe (92); under the action of the control valve, the coolant flows through the inner section of the extrusion belt (9) corresponding to the photovoltaic cell assembly (100) capable of cooling down, thereby cooling and dissipating the heat of the photovoltaic cell assembly (100).

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