Welding and cutting integrated tool for photovoltaic module

Abstract

The invention relates to the technical field of photovoltaic module welding, and discloses a welding and cutting integrated tool for a photovoltaic module, which comprises a pressure welding and cutting assembly, an operating rod and a heating assembly, the pressure welding cutting assembly comprises a heat insulation head and a pressure welding cutting roller rotationally connected to the heat insulation head. The heating assembly is electrically connected with the pressure welding cutting roller so as to heat the pressure welding cutting roller to enable the heating temperature to be higher than the welding material melting point and lower than the battery piece heat damage temperature; the outer wall of the pressure welding cutting roller is gradually concave inwards towards the axis from the left end part to the right end part to the middle part, so that arc-shaped grooves are formed in the top surface and the bottom surface of the longitudinal section of the pressure welding cutting roller, and the longitudinal section of the pressure welding cutting roller is integrally H-shaped; the heat insulation head is connected with the operating rod so as to drag the operating rod to drive the pressure welding cutting roller to roll on the surface of the welding material, and the operating rod is pressed downwards to enable the pressure welding cutting roller to apply pressure to the surface of the welding foil. Therefore, the tool can realize cutting and pressure welding of the welding foil in one step, the process is greatly simplified, the cost is low, and the damage to the battery piece is small.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic assembly welding, and in particular to an integrated welding and cutting tool for photovoltaic assemblies. Background Art

[0002] At present, during the welding process of solar cell modules (i.e., photovoltaic modules), it is necessary to first align the welding strips and the welding points, then glue the welding strips or weld the welding points to fix them, and then press weld the fixed welding strips. This welding process is not only complicated, has a long production cycle, and high equipment cost; but also the alignment process of the welding strips and the welding points increases the difficulty of the process operation. In addition, the traditional welding process is to press weld multiple welding strips on the surface of the entire photovoltaic module at the same time. This process is not only easy to cause thermal damage to the non-welding area on the surface of the photovoltaic module, but also the surface of the crystalline silicon cell will be uneven after string welding, and it will also cause irreversible damage such as hidden cracks and fragments to the cell; during the welding process of the welding points, the vertical chisel awl or pointed tweezers commonly used are also easy to cause irreversible scratches on the crystalline silicon cell. The above problems will affect the photoelectric conversion efficiency of the photovoltaic module. In addition, in recent years, the main grid-free (Zero Bus Bar, referred to as 0BB) photovoltaic cell has attracted much attention due to its small front shading area, low battery series resistance and dark current density, and higher conversion efficiency and fill factor. However, the current welding technology of busbar-free photovoltaic cell modules is mainly divided into four routes: welding glue dispensing, glue dispensing, film coating, and SmartWire. Glue, low-temperature welding tape, skin film or embedded circular copper welding tape are required in the welding process. Gluing is done through a needle, which is slow and uneven; and the use of low-temperature welding tape, skin film or embedded circular copper welding tape greatly increases the material cost.

[0003] In response to the above problems, many researchers have proposed laser welding and have made certain progress; but it still cannot solve the current interconnection problem between the welding ribbon and the crystalline silicon solar cell. For example, referring to the publication number CN118553814A, some researchers have proposed that the battery cell, welding ribbon, encapsulation film and photovoltaic glass can be laminated in advance, and then the welding ribbon and the crystalline silicon battery cell can be interconnected by laser sintering the welding ribbon. Although this technology eliminates the use of welding ribbon fixing materials such as adhesives or skin membranes; it still requires high-cost ultra-low temperature welding ribbons for welding, and laser light leakage or local heating during welding will cause irreversible damage or destruction to the encapsulation film or even the entire device, affecting the subsequent practical application of the product. Moreover, the omission of welding ribbon fixing materials may also cause the welding ribbon to be misaligned during the lamination process, and then the preset laser path cannot accurately cover the welding ribbon, resulting in poor welding. In addition, it is difficult to monitor the series yield of the battery cell, and it is difficult to repair defective products after lamination, which will increase production costs.

[0004] For example, with respect to laser sintering technology, see publication number CN112599642A, some scholars have proposed that a preset patterned tin-lead powder layer can be laid on the surface of the cell, and then the tin-lead powder layer can be melted by laser as an auxiliary layer, and the crystalline silicon solar cells can be interconnected through welding strips to reduce the shielding of light by the welding strips after welding, thereby improving the photoelectric conversion efficiency of the battery. Although this technology eliminates the use of a portion of the welding strip above the main grid, it avoids the shielding of light by the welding strip after welding to a certain extent. However, it is difficult to accurately pattern the metal powder on the surface of the main grid and align the actual pattern of the metal powder with the preset pattern of the laser beam. The misalignment of the actual pattern of the metal powder and the preset pattern of the main grid (or laser beam) is not easy to monitor and difficult to correct later. Moreover, the metal powder may not be completely melted during the sintering process, resulting in poor welding, and the residual metal powder will cause pollution to the surface of the crystalline silicon solar cell, affecting its photoelectric conversion efficiency. In addition, metal powder graphics and laser sintering add new processes based on the original processes, which not only complicates the process and reduces the fault tolerance, but also increases the defective rate in the intermediate links of the product and increases production and equipment costs. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an integrated welding and cutting tool for photovoltaic modules.

[0006] Based on this, the present invention discloses an integrated welding and cutting tool for photovoltaic modules, including a pressure welding and cutting module, an operating rod and a heating module;

[0007] The pressure welding and cutting assembly includes a heat insulation head and a pressure welding and cutting roller rotatably connected to the heat insulation head; the heating assembly is electrically connected to the pressure welding and cutting roller to heat the pressure welding and cutting roller so that the heating temperature thereof is higher than the melting point of the welding material and lower than the thermal damage temperature of the battery cell;

[0008] The outer wall of the pressure welding cutting roller is gradually concave toward the axis from the left and right ends to the middle, so that the top surface and the bottom surface of the longitudinal section of the pressure welding cutting roller are both formed with arc-shaped grooves concave toward the axis, and the longitudinal section of the pressure welding cutting roller is "H"-shaped as a whole;

[0009] The heat insulation head is connected to the operating rod, and the operating rod is dragged to make the heat insulation head drive the pressure welding cutting roller to roll on the surface of the welding material, and the pressure welding cutting roller applies downward pressure to the surface of the welding foil through the operating rod, so as to prompt the left and right ends of the pressure welding cutting roller to cut the molten welding material, and roll and press the molten welding material to the surface of the battery cell through the arc groove.

[0010] Preferably, the left and right end faces of the pressure welding and cutting roller are provided with a rotating shaft protruding outward; the bottom of the thermal insulation head is provided with a first mounting groove with a notch facing downward, so that the pressure welding and cutting roller can be embedded and installed in the first mounting groove through the rotating shaft, and the rotating shaft is rotatably connected to the thermal insulation head.

[0011] Further preferably, the heating assembly includes a wire and a brush, the brush is mounted on the rotating shaft, the lower end of the wire is in electrical contact with the brush, and the upper end of the wire is connected to an external power source or circuit; the welding material is welding foil.

[0012] More preferably, a receiving hole is provided inside the thermal insulation head, and the lower end of the receiving hole is connected to the first mounting groove; the brush is located in the lower end of the receiving hole, and the lower end of the wire is electrically contacted with the brush after passing through the receiving hole;

[0013] The number of the wires, brushes and accommodating holes is at least two, so as to correspond to and match the rotating axes of the left and right end surfaces of the pressure welding and cutting roller.

[0014] Preferably, the operating rod is equipped with a buffer device for buffering and regulating the pressure welding pressure.

[0015] Further preferably, the buffer device comprises an air container assembly and a piston assembly; the air container assembly comprises an air cavity installed in the upper end portion of the operating rod so as to be movable up and down;

[0016] The piston assembly includes a piston head and a connecting rod; the piston head is sealed and installed in the air cavity so that the top surface of the piston head and the upper end of the air cavity together form a closed space for accommodating inflation gas, and the piston head can move up and down along the inner wall of the air cavity under the action of downward pressure or air pressure; the lower end of the connecting rod passes through the piston head and the air cavity in turn and is connected to the operating rod.

[0017] More preferably, the piston assembly further comprises a sealing ring, and the outer side wall of the piston head is provided with a second mounting groove for mounting the sealing ring;

[0018] A circular hole for the connecting rod to pass through is also provided in the middle of the piston head.

[0019] More preferably, an annular protrusion is provided at the opening edge in the bottom of the air cavity, and the piston head is located above the annular protrusion, so that when the pressure in the enclosed space is too high, the annular protrusion is abutted against the bottom of the piston head to prevent the piston assembly from escaping from the air cavity.

[0020] Further preferably, the operating rod includes a fixed sleeve and a protective sleeve; the bottom of the fixed sleeve is connected to the thermal insulation head, and the protective sleeve is threadedly connected to the top of the fixed sleeve; a spiral hole is provided at the upper end of the fixed sleeve, and an external thread is provided at the lower end of the connecting rod, so that the connecting rod can be threadedly connected to the spiral hole after passing through the protective sleeve.

[0021] More preferably, an alarm component for indicating excessive welding pressure is installed on the upper part of the air cavity;

[0022] The alarm component includes a buzzer indicator, power supply electrode 1, power supply electrode 2, a mobile power supply and a protective cap; the mobile power supply is electrically connected to power supply electrode 1 and power supply electrode 2, the buzzer indicator is electrically connected to power supply electrode 1, power supply electrode 1 and power supply electrode 2 are spaced apart and are both located above the connecting rod, so that when the welding pressure is too large, the air cavity moves downward and the piston head moves upward along the inner wall of the air cavity, so that the upper end of the connecting rod electrically contacts the power supply electrode 1 and the power supply electrode 2, so that the buzzer indicator emits a buzzer and flashes a light to alarm; the protective cap is connected to the top of the air cavity to play a protective role.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] In the integrated welding and cutting tool of the present invention, when the operating rod drives the pressure welding and cutting roller to roll on the surface of the welding material (such as welding foil) through the heat-insulating head, the left and right edges of the "H"-shaped pressure welding and cutting roller will contact the surface of the welding foil, and the surface of the welding foil will be subjected to downward pressure in turn through the operating rod and the rolling pressure welding and cutting roller, and the pressure welding and cutting roller will be heated by the heating component at the same time; in this way, through the coordinated cooperation of the pressure welding and cutting component, the heating component and the operating rod, the melting and cutting of the welding foil can be achieved through the rolling and downward pressure of the heated pressure welding and cutting roller, and the melted liquid welding foil can be squeezed and concentrated into the arc-shaped groove, and the liquid welding foil can be pressure-welded to the surface of the crystalline silicon cell through rolling and pressing on the surface of the arc-shaped groove, thereby realizing the welding function. Therefore, the integrated welding and cutting tool can realize the cutting and stacking pressure welding process of the welding foil in one step, reducing the welding process of the photovoltaic module.

[0025] Moreover, the welding process of the integrated welding and cutting tool does not require the use of materials such as low-temperature welding strips, skin membranes or embedded circular copper welding strips, making the structure of photovoltaic modules simpler and lower in cost. Compared with the previous hot-press welding, the welding process of the integrated welding and cutting tool reduces the alignment and fixing processes of the welding strips, and the rolling welding of the "H"-shaped pressure welding and cutting roller only occurs in the welding area, which greatly reduces the welding area and can effectively reduce the thermal damage to the non-welding area during the welding process. Compared with other welding foil welding processes, the special "H"-shaped pressure welding and cutting roller structure of the welding head not only reduces the later welding foil cutting process, but also avoids sliding friction and damage between the welding head and the welding foil and crystalline silicon solar cells during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a photovoltaic module welding and cutting integrated tool in a normal state according to this embodiment.

[0027] Figure 2 This is an enlarged view of the front partial structure of the pressure-welded cutting assembly.

[0028] Figure 3 This is an enlarged view of the side structure of the pressure-welded cutting assembly.

[0029] Figure 4 This is a schematic structural diagram of an integrated welding and cutting tool for photovoltaic modules in an alarm state according to this embodiment.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the pressure welding cutting roller.

[0031] Figure 6 It is a partial cross-sectional view of the pressure welding cutting assembly after the wire 2 and brush 2 are removed.

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixed sleeve.

[0033] Figure 8 A partial cross-sectional view of the piston head.

[0034] Description of the accompanying drawings: pressure welding and cutting assembly 1; pressure welding and cutting roller 11; rotating shaft 111; arc groove 112; heat insulation head 12; first mounting groove 121; receiving hole 122;

[0035] Operating rod 2; fixing sleeve 21; spiral hole 211; through hole 212; protective sleeve 22;

[0036] Air containing component 3; annular protrusion 31; air cavity 32;

[0037] Piston assembly 4; sealing ring 41; piston head 42; circular hole 421; second mounting groove 422; connecting rod 43; external thread 431;

[0038] Alarm component 5; buzzer indicator 51; power supply electrode 1 52; power supply electrode 2 53; mobile power supply 54; protective cap 55;

[0039] Heating component 6; wire one 61; wire two 62; brush one 63; brush two 64. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example

[0042] This embodiment is a photovoltaic module welding and cutting integrated tool, see Figure 1It includes a pressure welding and cutting component 1, a heating component 6, an operating rod 2, an air container component 3, a piston component 4 and an alarm component 5.

[0043] See also Figure 1-6 The pressure welding and cutting assembly 1 includes a pressure welding and cutting roller 11 and a heat insulation head 12. The heat insulation head 12 has high temperature resistance and heat insulation properties. The left and right end surfaces of the pressure welding and cutting roller 11 are both provided with a rotating shaft 111 protruding outward (such as Figure 5 The top of the heat insulation head 12 is connected to the operating rod 2. The bottom of the heat insulation head 12 is provided with a first mounting groove 121 with a notch downward (as shown in FIG. Figure 6 As shown), the pressure welding and cutting roller 11 is embedded and installed in the first installation groove 121 through the rotating shaft 111, and the rotating shaft 111 is rotatably connected to the thermal insulation head 12, so as to ensure that the pressure welding and cutting roller 11 can be rotatably connected to the thermal insulation head 12 through the rotating shaft 111. In this way, during the welding process, the welding and cutting integrated tool is dragged and moved by the operating rod 2, so that the thermal insulation head 12 drives the rotating shaft 111 to rotate, so that the rotating shaft 111 drives the pressure welding and cutting roller 11 to roll on the surface of the welding material (preferably welding foil), and the pressure welding and cutting roller 11 applies downward pressure to the surface of the welding foil through the operating rod 2 and the thermal insulation head 12 in turn; thereby assisting the pressure welding and cutting roller 11 to cut the welding foil, and superimposing and welding the cut welding foil on the surface of the battery cell, that is, assisting in realizing the integrated operation of cutting and welding in one step.

[0044] In practice, the first mounting groove 121 is preferably a circular groove with the notch facing downward.

[0045] In order to assist in realizing the integrated operation of cutting and welding in one step, it is necessary to use a pressure welding cutting roller 11 with a specific shape and structure as follows: the outer peripheral wall of the pressure welding cutting roller 11 gradually concave inwardly toward the axis from the left and right ends to the middle, so that the top and bottom surfaces of the longitudinal section of the pressure welding cutting roller 11 are both formed with an arc-shaped groove 112 concave inwardly toward the axis (such as Figure 1 As shown), the longitudinal section of the pressure welding cutting roller 11 is "H"-shaped as a whole (hereinafter, the pressure welding cutting roller 11 with an "H"-shaped longitudinal section is referred to as the "H"-shaped pressure welding cutting roller 11).

[0046] In order to assist in realizing the integrated operation of cutting and welding in one step, the heating component 6 also needs to be electrically connected to the pressure welding cutting roller 11 to heat the "H"-shaped pressure welding cutting roller 11 with a certain resistance value, so that the "H"-shaped pressure welding cutting roller 11 heats up and heats up to a specific temperature (the specific temperature is higher than the melting point of the solder foil and lower than the highest temperature when the battery cell is not thermally damaged).

[0047] Therefore, the integrated welding and cutting tool of this embodiment uses welding foil as welding material, and cooperates with the welding and cutting assembly 1, the heating assembly 6 and the operating rod 2, and cooperates with the "H"-shaped welding and cutting roller 11 with arc grooves 112 on the top and bottom surfaces of the longitudinal section. In this way, in the process of the rotating shaft 111 driving the welding and cutting roller 11 to roll on the surface of the welding foil, the left and right edges of the "H"-shaped welding and cutting roller 11 both contact the surface of the welding foil, and the operating rod 2 and the rolling welding and cutting roller 11 are used to apply downward pressure to the surface of the welding foil in turn, and the heating assembly 6 is used to heat the welding and cutting roller 11; in this way, the rolling and downward pressure of the heated welding and cutting roller 11 can realize the melting and cutting of the welding foil, and the melted liquid welding foil is squeezed and concentrated into the arc groove 112, and the liquid welding foil can be welded to the surface of the crystalline silicon cell through rolling pressing on the surface of the arc groove 112, so as to realize the welding function. Therefore, the integrated welding and cutting tool can realize the welding foil cutting and lamination welding process in one step, reducing the welding process of photovoltaic modules. The arc groove 112 also plays a certain shaping role on the molten welding foil during the rolling pressing process. After the arc groove 112 is rolled and pressed away, the pressed welding foil will cool down and then be completely shaped.

[0048] Moreover, the welding process does not require the use of materials such as low-temperature welding strips, skin membranes or embedded circular copper welding strips, making the structure of photovoltaic modules simpler and lower in cost. Compared with the previous hot-press welding, the welding strip alignment and fixing process is reduced during the welding process, and the rolling welding of the "H"-shaped pressure welding cutting roller 11 only occurs in the welding area, which greatly reduces the welding area and can effectively reduce the thermal damage to the non-welding area during the welding process. Compared with other welding foil welding processes, the special "H"-shaped pressure welding cutting roller 11 structure of the welding head not only reduces the later welding foil cutting process, but also avoids the sliding friction and damage between the welding head and the welding foil and crystalline silicon cell during the welding process. In addition, compared with the sliding pressure welding contact, the rolling pressure welding of the "H"-shaped pressure welding cutting roller 11 can reduce the sliding damage of the contact to the crystalline silicon cell and the welding foil surface during the welding process.

[0049] In practice, the distance between the left and right edges of the "H"-shaped pressure welding and cutting roller 11 can be set according to the welding width requirements of the welding material, and the resistance value of the "H"-shaped pressure welding and cutting roller 11 can be set according to actual heating requirements.

[0050] Specifically, see Figure 1-4 and Figure 6 The heating assembly 6 includes a wire (such as wire 1 61, wire 2 62) and a brush (such as brush 1 63, brush 2 64). Correspondingly, the interior of the heat insulation head 12 is provided with at least two receiving holes 122 (such as Figure 6As shown), the operating rod 2 is provided with at least two through holes 212 (as shown) spaced apart from each other. Figure 7 As shown in FIG. 1 , the through hole 212 is connected to the receiving hole 122. Taking the wire 1 61, the brush 1 63, one of the receiving holes 122, one of the through holes 212 and the rotating shaft 111 on the left end face of the pressure welding cutting roller 11 as an example, the connection or installation relationship of the wire, the brush, the receiving hole 122, the through hole 212 and the rotating shaft 111 is described as follows:

[0051] The brush 1 63 is installed in the lower end of the receiving hole 122; the upper end of the wire 1 61 is connected to the external circuit or the external mobile power supply 54; the lower end of the wire 1 61 passes through the through hole 212 and reaches the lower end of the receiving hole 122 to make electrical contact with the brush 1 63; and the lower end of the receiving hole 122 is connected to the first installation groove 121, so that the brush 1 63 can be installed on the rotating shaft 111 on the left end surface of the pressure welding cutting roller 11. The connection or installation relationship between the wire 2 62, the brush 2 64, another receiving hole 122, another through hole 212 and the rotating shaft 111 on the right end surface of the pressure welding cutting roller 11 is similar, so it will not be repeated. In this way, the wire is electrically connected to the pressure welding and cutting roller 11 through the brush and the rotating shaft 111, so that the heating component 6 heats the pressure welding and cutting roller 11, and the heating temperature of the pressure welding and cutting roller 11 can be higher than the melting point of the solder foil and lower than the highest temperature when the crystalline silicon cell is not thermally damaged.

[0052] A buffer device composed of an air container assembly 3 and a piston assembly 4 is installed on the upper part of the operating rod 2 for buffering and regulating the pressure of the pressure welding.

[0053] Specifically, the operating rod 2 includes a fixed sleeve 21 and a protective sleeve 22; the bottom of the fixed sleeve 21 is connected to the heat insulation head 12, and the protective sleeve 22 is threadedly connected to the top of the fixed sleeve 21. The air container component 3 includes an air cavity 32, which has a specific shape and is installed at the upper end of the protective sleeve 22 so as to be movable up and down, thereby assisting in buffering and adjusting the welding pressure.

[0054] Further, the piston assembly 4 includes a sealing ring 41, a piston head 42 and a connecting rod 43. The outer side wall of the piston head 42 is provided with a second mounting groove 422 (such as Figure 8As shown in the figure), the sealing ring 41 is in close contact with the piston head 42 in the second installation groove 422. The piston head 42 is sealed and installed inside the air cavity 32 through the sealing ring 41, so that the top surface of the piston head 42 and the upper end of the air cavity 32 together form a closed space for the inflation gas to be contained, and the piston head 42 can move up and down along the inner wall of the air cavity 32 under the action of the downward pressure or air pressure to achieve the compression of the gas in the closed space. During the pressure welding process, the bottom surface of the piston head 42 abuts against the top surface of the protective sleeve 22. In this way, the buffering and adjustment of the welding pressure are achieved through the cooperation of the air cavity 32 and the piston head 42 that can move up and down.

[0055] Therefore, when the pressure welding and cutting roller 11 is pressed against the welding foil, an upward force will be exerted on the pressure welding and cutting assembly 1, the operating rod 2 and the piston assembly 4. Under the action of the buffer device composed of the gas container assembly 3 and the piston assembly 4, the gas in the enclosed space will be compressed to increase the pressure of the pressure welding and cutting roller 11 on the welding foil, thereby helping to achieve the integrated function of welding and cutting.

[0056] Specifically, a circular hole 421 (such as Figure 8 In practice, the inner diameter of the circular hole 421 can be set according to the connection requirements with the connecting rod 43. The lower end of the connecting rod 43 is provided with an external thread 431 (as shown in FIG. Figure 1 As shown), the upper end of the fixing sleeve 21 is provided with a spiral hole 211 (as shown Figure 7 As shown in the figure, the lower end of the connecting rod 43 passes through the piston head 42, the air cavity 32 and the protective sleeve 22 in sequence and is then threadedly connected to the spiral hole 211, so that the lower end of the connecting rod 43 is fixedly installed on the fixed sleeve 21. In practice, the inner diameter and depth of the spiral hole 211 can be set according to the fixing requirements of the connecting rod 43. The outer diameter of the connecting rod 43 and the length of the external thread 431 can be set according to the connection requirements with the fixed sleeve 21.

[0057] Moreover, an annular protrusion 31 (such as Figure 1 , 4 As shown), the piston head 42 is located above the annular protrusion 31; in this way, when the pressure required for pressure welding is too large and the pressure in the air cavity 32 is still higher than the atmospheric pressure after resetting, the top of the annular protrusion 31 can be abutted against the bottom of the piston head 42 to prevent the piston assembly 4 from falling out of the air cavity 32.

[0058] An alarm component 5 is also installed on the upper part of the gas container component 3 to indicate that the welding pressure is too high, so as to remind the operator to adjust the welding pressure in time, thereby effectively alleviating the problem of fragmentation and hidden cracks of the battery cell.

[0059] Specifically, the alarm component 5 includes a buzzer indicator 51, a power supply electrode 1 52, a power supply electrode 2 53, a mobile power supply 54 and a protective cap 55. The mobile power supply 54 is electrically connected to the top of the power supply electrode 1 52 and the power supply electrode 2 53 to provide electrical energy; the buzzer indicator 51 is electrically in contact with the power supply electrode 1 52. The power supply electrode 1 52 and the power supply electrode 2 53 are both installed in the upper end of the air cavity 32, and the power supply electrode 1 52 and the power supply electrode 2 53 are spaced apart from each other. The upper end of the connecting rod 43 extends to the top of the piston head 42 (the extension length of the upper end of the connecting rod 43 can be set according to the actual alarm requirements when the welding and cutting integrated tool is compressed by a large pressure), and the top of the connecting rod 43 is conductive; the power supply electrode 1 52 and the power supply electrode 2 53 both have good conductivity, and the power supply electrode 1 52 and the power supply electrode 2 53 are both located above the connecting rod 43. Therefore, during the pressure welding process, excessive welding pressure will cause the air cavity 32 to move downward excessively and the piston head 42 to move upward excessively along the inner wall of the air cavity 32, so that the upper end of the connecting rod 43 can electrically contact the power supply electrode 1 52 and the power supply electrode 2 53, so that the connecting rod 43 and the buzzer indicator 51, the power supply electrode 1 52, the power supply electrode 2 53 and the mobile power supply 54 form a closed circuit, thereby causing the buzzer indicator 51 to emit a buzzer and flash the light to realize the alarm function.

[0060] Preferably, the bottoms of the power supply electrode 1 52 and the power supply electrode 2 53 are at the same height as the contact surface of the top of the connecting rod 43 .

[0061] The protective cap 55 is installed above the mobile power source 54, and the protective cap is connected to the top of the air cavity 32 to play a protective role.

[0062] During the welding process, when the integrated welding and cutting tool vibrates due to the rolling of the pressure welding and cutting roller 11, the buffer device composed of the gas container component 3 and the piston component 4 will play a buffering role, alleviating the problem of fragmentation or hidden cracks of the crystalline silicon cell caused by the rigid stress. When the vibration is too large, the top of the connecting rod 43 will contact the power supply electrode 1 52 and the power supply electrode 2 53, so that the top of the connecting rod 43 and the alarm component 5 form a closed loop, so that the buzzer indicator 51 buzzes and flashes the light alarm to warn that the internal air pressure of the air cavity 32 is the maximum pressure that the crystalline silicon cell can withstand during the pressure welding process, thereby reminding the staff to adjust the welding pressure in time.

[0063] The "H"-shaped pressure welding cutting roller 11 has a certain resistance value. By applying a matching certain voltage to the top of wire 1 61 and wire 2 62, the "H"-shaped pressure welding cutting roller 11 is heated so that the heating temperature of the "H"-shaped pressure welding cutting roller 11 is higher than the melting point of the solder foil and lower than the maximum temperature when the crystalline silicon cell is not thermally damaged. Afterwards, the integrated welding and cutting tool is held or fixed on an external machine, the welding foil is stacked on the surface of the crystalline silicon cell, and the integrated welding and cutting tool is dragged to make the rotating shaft 111 drive the pressure welding and cutting roller 11 to roll on the surface of the welding foil, and the pressure welding and cutting roller 11 is heated by the heating component 6, so that the heating temperature of the pressure welding and cutting roller 11 is higher than the melting point of the welding foil and lower than the highest temperature when the crystalline silicon cell is not thermally damaged; through the preset pattern (or preset path), the heated "H"-shaped pressure welding and cutting roller 11 is melted and cut to the welding foil, and the melted liquid welding foil is rolled and pressed on the surface of the arc groove 112, and superimposed and welded on the surface of the crystalline silicon cell, so that the cutting function of the excess welding foil and the superimposition welding function of the liquid welding foil can be realized in one step. After the welding is completed, the integrated welding and cutting tool is separated from the surface of the welding foil, and the air cavity 32 will push the piston component 4, the operating rod 2 and the pressure welding and cutting component 1 to reset, so that the integrated welding and cutting tool can be quickly reset.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0065] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A welding and cutting integrated tool for photovoltaic modules, characterized in that: It includes a pressure welding and cutting assembly, an operating rod and a heating assembly; The pressure welding and cutting assembly includes a heat insulation head and a pressure welding and cutting roller rotatably connected to the heat insulation head; the heating assembly is electrically connected to the pressure welding and cutting roller to heat the pressure welding and cutting roller so that the heating temperature thereof is higher than the melting point of the welding material and lower than the thermal damage temperature of the battery cell; The outer wall of the pressure welding cutting roller is gradually concave toward the axis from the left and right ends to the middle, so that the top surface and the bottom surface of the longitudinal section of the pressure welding cutting roller are both formed with arc-shaped grooves concave toward the axis, and the longitudinal section of the pressure welding cutting roller is "H" shaped as a whole; The heat insulation head is connected to the operating rod, and the operating rod is dragged to make the heat insulation head drive the pressure welding cutting roller to roll on the surface of the welding material, and the pressure welding cutting roller applies downward pressure to the surface of the welding foil through the operating rod, so as to prompt the left and right ends of the pressure welding cutting roller to cut the molten welding material, and roll and press the molten welding material to the surface of the battery cell through the arc groove.

2. The photovoltaic module welding and cutting integrated tool according to claim 1, characterized in that: The left and right end faces of the pressure welding and cutting roller are both provided with a rotating shaft protruding outward; the bottom of the thermal insulation head is provided with a first mounting groove with a notch facing downward, so that the pressure welding and cutting roller can be embedded and installed in the first mounting groove through the rotating shaft, and the rotating shaft is rotatably connected to the thermal insulation head.

3. The photovoltaic module welding and cutting integrated tool according to claim 2, characterized in that: The heating component comprises a wire and a brush, the brush is mounted on the rotating shaft, the lower end of the wire is in electrical contact with the brush, and the upper end of the wire is connected to an external power source or circuit; the welding material is welding foil.

4. The photovoltaic module welding and cutting integrated tool according to claim 3, characterized in that: The insulation head is provided with a receiving hole inside, and the lower end of the receiving hole is connected to the first mounting groove; the brush is located in the lower end of the receiving hole, and the lower end of the wire is electrically connected to the brush after passing through the receiving hole; The number of the wires, brushes and accommodating holes is at least two, so as to correspond to and match the rotating axes of the left and right end surfaces of the pressure welding and cutting roller.

5. The photovoltaic module welding and cutting integrated tool according to claim 1, characterized in that: The operating rod is equipped with a buffer device for buffering and regulating the pressure welding pressure.

6. The photovoltaic module welding and cutting integrated tool according to claim 5, characterized in that: The buffer device includes an air container assembly and a piston assembly; the air container assembly includes an air cavity installed in the upper end of the operating rod so as to be movable up and down; The piston assembly includes a piston head and a connecting rod; the piston head is sealed and installed in the air cavity so that the top surface of the piston head and the upper end of the air cavity together form a closed space for accommodating inflation gas, and the piston head can move up and down along the inner wall of the air cavity under the action of downward pressure or air pressure; the lower end of the connecting rod passes through the piston head and the air cavity in turn and is connected to the operating rod.

7. The photovoltaic module welding and cutting integrated tool according to claim 6, characterized in that: The piston assembly also includes a sealing ring, and the outer side wall of the piston head is provided with a second installation groove for installing the sealing ring; A circular hole for the connecting rod to pass through is also provided in the middle of the piston head.

8. The photovoltaic module welding and cutting integrated tool according to claim 6, characterized in that: An annular protrusion is also provided at the opening edge in the bottom of the air cavity, and the piston head is located above the annular protrusion, so that when the pressure in the enclosed space is too high, the annular protrusion and the bottom of the piston head are abutted to prevent the piston assembly from falling out of the air cavity.

9. The photovoltaic module welding and cutting integrated tool according to claim 6, characterized in that: The operating rod includes a fixed sleeve and a protective sleeve; the bottom of the fixed sleeve is connected to the insulation head, and the protective sleeve is threadedly connected to the top of the fixed sleeve; a spiral hole is provided at the upper end of the fixed sleeve, and an external thread is provided at the lower end of the connecting rod, so that the connecting rod can be threadedly connected to the spiral hole after passing through the protective sleeve.

10. The photovoltaic module welding and cutting integrated tool according to claim 6, characterized in that: An alarm component for indicating excessive welding pressure is also installed on the upper part of the air cavity; The alarm component includes a buzzer indicator, power supply electrode 1, power supply electrode 2, a mobile power supply and a protective cap; the mobile power supply is electrically connected to power supply electrode 1 and power supply electrode 2, the buzzer indicator is electrically connected to power supply electrode 1, power supply electrode 1 and power supply electrode 2 are spaced apart and are both located above the connecting rod, so that when the welding pressure is too large, the air cavity moves downward and the piston head moves upward along the inner wall of the air cavity, so that the upper end of the connecting rod electrically contacts the power supply electrode 1 and the power supply electrode 2, so that the buzzer indicator emits a buzzer and flashes a light to alarm; the protective cap is connected to the top of the air cavity to play a protective role.

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