Welding device and battery string welding equipment

Abstract

The utility model relates to the field of photovoltaic module production, in particular to a welding device and a battery string welding device.The welding device comprises an air blower, a lamp box and at least one exhaust tube, the lamp box comprises a frame, a lamp set, a fan cover assembly and at least one first temperature detection piece, the lamp set, the fan cover assembly and the at least one first temperature detection piece are arranged on the frame, and the fan cover assembly covers the lamp set; a first end pipe opening of the exhaust pipe is fixed to the fan cover assembly and communicates with the fan cover assembly, a second end pipe opening of the exhaust pipe is connected with an exhaust opening of the air blower, the air blower is configured to exhaust air and cool the area where the lamp set is located through the exhaust pipe, and the first temperature detection piece is configured to measure the temperature of the area where the lamp set is located. The temperature of the area where the lamp set is located is detected through the first temperature detection piece, when the temperature of the area where the lamp set is located is higher than a set value or a set range, heat of the area where the lamp set is located is taken away through the air blower and prevented from being blown to a welding strip and a battery piece, and the welding temperature can be effectively controlled by controlling the power, the working duration and the like of the lamp set; the welding quality is ensured.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module manufacturing, specifically a welding apparatus and battery string welding equipment. Background Technology

[0002] In the automated production process of photovoltaic modules, solder ribbons and solar cells need to be stacked into strings in a predetermined order, and then welded together using a welding device. Existing welding devices typically include a lamp box. To prevent the lamp box from overheating, a heat dissipation component is usually installed inside to cool the box and maintain a suitable welding temperature. Current heat dissipation components are typically fans. During welding, infrared light emitted from the lamps inside the lamp box welds the solder ribbons and solar cells. Simultaneously, the fan blows heat from the environment onto the solder ribbons and solar cells. The unstable heat output from the fan leads to uncontrollable welding temperature and welding quality. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a welding apparatus, the detailed technical solution of which is as follows:

[0004] A welding apparatus includes a blower, a lamp box, and at least one exhaust pipe. The lamp box includes a frame and lamps, a hood assembly, and at least one first temperature sensor mounted on the frame. The hood assembly covers the lamps. The first end of the exhaust pipe is fixed to the hood assembly and the two are connected. The second end of the exhaust pipe is connected to the exhaust port of the blower. The blower is configured to draw air from the area where the lamps are located through the exhaust pipe to cool it down. The first temperature sensor is configured to measure the temperature of the area where the lamps are located.

[0005] This application uses a first temperature detection element to detect the temperature of the area where the lamp group is located. When the temperature of the area where the lamp group is located is higher than the set value or the set range, a blower is used to remove the heat from the area where the lamp group is located, so as to prevent this heat from being blown onto the welding strip and the battery cell. Furthermore, the welding temperature can be effectively controlled by controlling the power and working time of the lamp group, so as to ensure the welding quality.

[0006] In some embodiments, the light box extends along a first direction, and the hood assembly includes at least two hood units arranged side by side along the first direction. All hood units cover the light assembly, and each hood unit is connected to an exhaust pipe. The opening of the hood unit faces the light assembly, and the first end of the exhaust pipe is located at a position opposite to the opening of the hood unit.

[0007] The light box extends along the first direction. During welding, the length direction of the light box is consistent with the length direction of the battery string, meaning the entire battery string can be welded using the light box, resulting in high welding efficiency. The fan units are arranged side by side along the length direction of the light box, and each fan unit is connected to an exhaust pipe. Multiple exhaust pipes simultaneously draw air from the light box, ensuring uniform heat dissipation in all areas of the light box.

[0008] In some embodiments, the light box includes a reflector with a plurality of ventilation holes evenly distributed on its surface; the reflector is disposed between the shroud assembly and the light group, or the reflector is disposed at the opening end of the shroud unit; the surface of the reflector faces the light group, and the reflector is configured to reflect the light emitted by the light group.

[0009] The reflector reflects the light emitted by the lamp assembly, allowing more light to reach the solder ribbon and solar cells, thus improving the welding effect. Additionally, the reflector has multiple ventilation holes, meaning it does not interfere with the blower's ventilation of the area where the lamp assembly is located, and heat from that area can be extracted through the ventilation holes.

[0010] In some embodiments, the welding apparatus further includes a pressure pin assembly mounted on the frame of the light box. The pressure pin assembly includes a plurality of elastic pressure pins arranged in a matrix. The light group includes at least two lamp tubes arranged side by side. At least one row of elastic pressure pins is provided between two adjacent lamp tubes, and the outer ends of the elastic pressure pins protrude beyond the lamp tubes.

[0011] The elastic pressure pin is used to press the solder strip in the battery string, so that the solder strip and the battery cell are in close contact, thereby ensuring that the solder strip and the battery cell are reliably connected after welding.

[0012] In some embodiments, the length direction of the lamp tube is along the second direction, all lamp tubes are arranged side by side at intervals along the first direction, and the second direction is perpendicular to the first direction;

[0013] The pressure needle assembly includes multiple pressure needle units. Each pressure needle unit includes a mounting strip with a row of elastic pressure needles on it. The row of elastic pressure needles on the mounting strip is spaced apart along a second direction. The mounting strip is mounted on the frame of the light box. At least one pressure needle unit is provided between two adjacent light tubes.

[0014] Alternatively, the pressure pin assembly includes a mounting plate on which multiple elastic pressure pins are arranged in a matrix, and the mounting plate is mounted on the frame of the light box.

[0015] The pressure needle assembly can adopt either of the above two structural forms as needed. When the pressure needle assembly adopts a structure with multiple pressure needle units, if a single pressure needle unit is damaged, the damaged pressure needle unit can be replaced individually, saving maintenance costs. When the pressure needle assembly adopts a structure with a mounting plate and elastic pressure needles, the installation and disassembly of the pressure needle assembly and the light box frame are more convenient.

[0016] In some embodiments, the welding apparatus includes at least one air blowing pipe mounted on the frame of the lamp box. The air blowing pipe has at least one air blowing hole on its wall. The air blowing pipe is connected to an air source, and the gas from the air source is blown towards the outer area of ​​the lamp assembly through the air blowing hole of the air blowing pipe.

[0017] After the light box is welded, air is blown onto the solder strip and battery cells to cool them down, so that the molten solder on the solder strip can be solidified again, ensuring a reliable connection between the solder strip and the battery cells.

[0018] This application also proposes a battery string welding device, which includes the above welding apparatus and at least one support unit;

[0019] The carrying unit includes a moving mechanism and a carrying platform. The moving mechanism is configured to drive the carrying platform to move between the loading station, the welding station and the unloading station. The carrying platform is used to carry the battery string.

[0020] The welding device includes a lifting mechanism. The frame of the light box is installed on the drive end of the lifting mechanism. The lifting mechanism is configured to drive the light box to rise and fall. The welding device is set above the welding station. The light box of the welding device is configured to weld the battery string on the support platform of the welding station.

[0021] During loading, a moving mechanism drives the carrier platform to the loading station, where an entire string of batteries can be transferred onto the carrier platform, or multiple battery cells can be placed on the carrier platform and the welding ribbon can be pulled onto the battery cells, so that the battery cells and welding ribbon are stacked on the carrier platform in a predetermined order to form a battery string. Then, the moving mechanism drives the carrier platform and the battery string on it to the welding station, and the lifting mechanism lowers the light box to the appropriate welding position. The light box is used to weld the entire battery string. After welding is completed, the lifting mechanism raises the light box to the initial position, and the moving mechanism moves the carrier platform to the unloading station. The welded battery string is then removed from the carrier platform using a suction cup or other robotic arm. The entire process achieves automated welding of the entire battery string with high efficiency.

[0022] In some embodiments, there are two support units arranged side by side. The welding device includes a traversing mechanism and a lifting mechanism mounted on the drive end of the traversing mechanism. The traversing mechanism is configured to drive the lifting mechanism and the light box to move between the welding stations of the two support units, so as to use the light box to alternately weld the battery strings at the welding stations of the two support units.

[0023] The two carrier units take turns receiving battery strings at the loading station and welding them through the light box. That is, when the battery strings on the carrier platform of one carrier unit are finished being welded through the light box, the carrier platform of the other carrier unit is already waiting to weld the battery strings at the welding station. The light box can be moved above the carrier platform of the other carrier unit to continue welding the battery strings thereon. The cooperation of the two carrier units can reduce the waiting time for welding battery strings and greatly improve production efficiency.

[0024] In some embodiments, the moving mechanism includes a first translation mechanism and a second translation mechanism, the carrying platform is mounted on the drive end of the second translation mechanism, the second translation mechanism is configured to drive the carrying platform to translate along a second direction, the second translation mechanism is mounted on the drive end of the first translation mechanism, and the first translation mechanism is configured to drive the second translation mechanism and the carrying platform to translate along a first direction;

[0025] The welding station and the unloading station are arranged on the moving path of the bearing platform along the first direction. The loading station of the two bearing units is the same station, and the loading station is located between the two bearing units. The loading station is arranged on the moving path of the bearing platform along the second direction.

[0026] The two carrier units share a single loading station, meaning that the two carrier units can receive battery cells and welding strips, or battery strings, at the same station, which is quite convenient.

[0027] In some embodiments, the support unit further includes at least one heating element and at least one second temperature detection element, both of which are disposed in the support platform.

[0028] The heating element heats the support platform to preheat the battery strings on it before welding, thus saving welding time and improving welding efficiency. The second temperature sensing element detects the temperature of the support platform and controls the heating element to continue or pause heating based on the detected temperature, ensuring the support platform remains within a suitable temperature range. Attached Figure Description

[0029] Figure 1 This is a structural diagram of the welding apparatus of this application;

[0030] Figure 2 This is a structural diagram showing the assembly of the light box and the exhaust pipe in this application;

[0031] Figure 3 for Figure 2 Another structural diagram;

[0032] Figure 4 for Figure 3 Enlarged view of section A;

[0033] Figure 5This is a structural diagram of the pressure needle unit of this application;

[0034] Figure 6 This is a structural diagram showing the fit between the hood assembly and the exhaust duct in this application;

[0035] Figure 7 This is a top view of the battery string welding equipment of this application;

[0036] Figure 8 This is a perspective view of the battery string welding equipment of this application;

[0037] Figure 9 This is a partial structural diagram of the battery string welding equipment of this application.

[0038] Figures 1 to 9 Includes:

[0039] 10-Lightbox; 11-Frame; 12-Lamp tube; 13-Wind cover unit; 14-Reflector; 20-Exhaust pipe; 30-Pressing needle assembly; 31-Elastic pressing needle; 32-Mounting strip; 40-Air blowing pipe; 51-Moving mechanism; 511-Second belt; 512-First seat; 513-Fourth motor; 514-Gear; 515-Rack; 516-Second seat; 52-Bearing platform; 60-Lifting mechanism; 61-First motor; 62-Screw and nut mechanism; 63-Lifting frame; 64-Horizontal moving frame; 70-Horizontal moving mechanism; 71-Fixed frame; 72-Second motor; 73-First belt. Detailed Implementation

[0040] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1 to 9 As shown in the figure, this application provides a welding device, which includes a blower, a lamp box 10 and at least one exhaust pipe 20. The lamp box 10 includes a frame 11 and a lamp assembly, a fan hood assembly and at least one first temperature detection element disposed on the frame 11. The fan hood assembly covers the lamp assembly. The first end of the exhaust pipe 20 is fixed to the fan hood assembly and the two are connected. The second end of the exhaust pipe 20 is connected to the exhaust port of the blower. The blower is configured to draw air from the area where the lamp assembly is located to cool it down through the exhaust pipe 20. The first temperature detection element is configured to measure the temperature of the area where the lamp assembly is located.

[0042] In the photovoltaic module manufacturing process, the lamp box 10 of the welding device of this application can be placed above the battery string to heat the battery string, thereby welding the solder strips in the battery string together. During the welding process, the temperature of the area where the lamp group is located is detected by a first temperature detection element. When the temperature of the area where the lamp group is located is higher than a set value or a set range, a blower is used to remove the heat from the area where the lamp group is located, preventing this heat from being blown onto the solder strips and battery cells. Furthermore, the welding temperature can be effectively controlled by controlling the power and working time of the lamp group, ensuring welding quality.

[0043] In some embodiments, the light box 10 extends along a first direction X, and the hood assembly includes at least two hood units 13 arranged side by side along the first direction X. All hood units 13 cover the light assembly, and each hood unit 13 is connected to an exhaust pipe 20. The opening of the hood unit 13 faces the light assembly, and the first end of the exhaust pipe 20 is located at a position opposite to the opening of the hood unit 13.

[0044] The light box 10 extends along the first direction X. During welding, the length direction of the light box 10 is aligned with the length direction of the battery string, meaning the entire battery string can be welded using the light box 10, resulting in high welding efficiency. The fan units 13 are arranged side-by-side along the length direction of the light box 10, and each fan unit 13 is connected to an exhaust pipe 20. Multiple exhaust pipes 20 simultaneously draw air from the light box 10, ensuring uniform heat dissipation across all areas of the light box 10. Figure 6 As shown, the hood unit 13 includes four surrounding plates, which are arranged in a truncated quadrangular shape. The small port of the hood unit 13 is connected to the exhaust pipe 20, and the large port of the hood unit 13 faces the light box 10, so as to ensure that the heat emitted by the light box 10 can be easily drawn into the hood unit 13 and then drawn away by the exhaust pipe 20 and the blower.

[0045] In some embodiments, the light box 10 includes a reflector 14, on which a plurality of ventilation holes are uniformly opened; the reflector 14 is disposed between the hood assembly and the lamp group, or the reflector 14 is disposed at the opening end of the hood unit 13; the surface of the reflector 14 faces the lamp group, and the reflector 14 is configured to reflect the light emitted by the lamp group.

[0046] by Figure 6 For example, the reflector 14 is located at the large port of the shroud unit 13, meaning the reflector 14 and the shroud unit 13 are fixed together. During installation or disassembly, the reflector 14 is installed or disassembled along with the shroud unit 13, which is convenient. The reflector 14 can reflect the light emitted by the lamp assembly, allowing more light to illuminate the solder ribbon and battery cells, thereby improving the welding effect. Furthermore, the reflector 14 has multiple ventilation holes, meaning it does not affect the blower's ventilation of the area where the lamp assembly is located, and heat from the area can be extracted through the ventilation holes.

[0047] In some embodiments, the welding apparatus further includes a pressure pin assembly 30, which is mounted on the frame 11 of the light box 10. The pressure pin assembly 30 includes a plurality of elastic pressure pins 31 arranged in a matrix. The light group includes at least two lamp tubes 12 arranged side by side. At least one row of elastic pressure pins 31 is arranged between two adjacent lamp tubes 12. The outer ends of the elastic pressure pins 31 protrude beyond the lamp tubes 12.

[0048] When the light box 10 is welding the battery string, the elastic pressure pins 31 in the pressure pin assembly 30 press on the welding strips of the battery string. Each welding strip in the battery string can be pressed by a row of elastic pressure pins 31, so that all welding strips are in close contact with the corresponding battery cells, thereby ensuring that the welding strips and battery cells are reliably connected after welding.

[0049] In some embodiments, the length direction of the lamp tube 12 is along the second direction Y, and all lamp tubes 12 are arranged side by side at intervals along the first direction X, with the second direction Y being perpendicular to the first direction X;

[0050] The structure of the pressure needle assembly 30 can include the following two types:

[0051] The first type, such as Figure 4 and 5 As shown, the pressure needle assembly 30 includes multiple pressure needle units, each pressure needle unit including a mounting strip 32, on which a row of elastic pressure needles 31 are provided. The row of elastic pressure needles 31 on the mounting strip 32 is spaced apart along the second direction Y. The mounting strip 32 is disposed on the frame 11 of the light box 10, and at least one pressure needle unit is provided between two adjacent lamp tubes 12.

[0052] The second type includes a pressure pin assembly 30, which includes a mounting plate on which multiple elastic pressure pins 31 are arranged in a matrix. The mounting plate is mounted on the frame 11 of the light box 10.

[0053] The pressure needle assembly 30 can adopt the above two structural forms as needed. When the pressure needle assembly 30 adopts the first structural form, if a certain elastic pressure needle 31 is damaged, the pressure needle unit where the damaged elastic pressure needle 31 is located can be removed and replaced separately, saving maintenance costs. When the pressure needle assembly 30 adopts the second structural form, the installation and disassembly of the pressure needle assembly 30 and the frame 11 are more convenient.

[0054] In some embodiments, the welding apparatus includes at least one air blowing pipe 40, which is mounted on the frame 11 of the lamp box 10. At least one air blowing hole is provided on the pipe wall of the air blowing pipe 40. The air blowing pipe 40 is connected to an air source, and gas from the air source is blown towards the outer region of the lamp assembly through the air blowing hole of the air blowing pipe 40. The outer region of the lamp assembly is the area where the battery string is located during welding.

[0055] When the 10 pairs of battery strings in the light box are soldered, the solder on the solder strip will melt. After the soldering is completed, the solder strip and the battery cell are cooled by blowing air through the air pipe 40, so that the melted solder on the solder strip can be solidified again. The solidified solder makes the solder strip and the battery cell reliably connected.

[0056] like Figure 7 , 8 As shown, this application also proposes a battery string welding device, which includes the above welding device and at least one support unit;

[0057] The carrying unit includes a moving mechanism 51 and a carrying platform 52. The moving mechanism 51 is configured to drive the carrying platform 52 to move between the loading station A, the welding station B and the unloading station C. The carrying platform 52 is used to carry the battery string.

[0058] The welding device includes a lifting mechanism 60. The frame 11 of the light box 10 is installed on the drive end of the lifting mechanism 60. The lifting mechanism 60 is configured to drive the light box 10 to rise and fall. The welding device is located above the welding station B. The light box 10 of the welding device is configured to weld the battery string on the support platform 52 of the welding station B.

[0059] During loading, the moving mechanism 51 drives the carrier platform 52 to the loading station A, where the entire battery string can be transferred onto the carrier platform 52, or multiple battery cells can be placed on the carrier platform 52 and the welding ribbon can be pulled onto the battery cells, so that the battery cells and welding ribbon are stacked on the carrier platform 52 in a predetermined order to form a battery string. Then, the moving mechanism 51 drives the carrier platform 52 and the battery string on it to the welding station B. The lifting mechanism 60 drives the light box 10 to descend to the appropriate welding position, and the light box 10 is used to weld the entire battery string. After welding is completed, the air blowing pipe 40 blows air to cool the welding ribbon and battery cells. Then, the lifting mechanism 60 drives the light box 10 to rise to the initial position, and the moving mechanism 51 drives the carrier platform 52 to the unloading station C. The welded battery string on the carrier platform 52 can be removed by using a suction cup or other robotic arm. The whole process realizes automated welding of the entire battery string with high efficiency.

[0060] In some embodiments, there are two support units arranged side by side. The welding device includes a transverse mechanism 70 and a lifting mechanism 60 mounted on the drive end of the transverse mechanism 70. The transverse mechanism 70 is configured to drive the lifting mechanism 60 and the light box 10 to move between the welding stations B of the two support units, so as to use the light box 10 to alternately weld the battery strings at the welding stations B in the two support units.

[0061] The two carrier units' carrier platforms 52 take turns receiving battery strings at the loading station A and welding them through the light box 10 in turn. That is, when the battery strings on the carrier platform 52 of one carrier unit are finished being welded by the light box 10, the carrier platform 52 of the other carrier unit is already carrying battery strings at the welding station B waiting to be welded. The light box 10 can be moved horizontally above the carrier platform 52 of the other carrier unit to continue welding the battery strings on it. The cooperation of the two carrier units can reduce the waiting time of the light box 10 for battery strings and greatly improve production efficiency.

[0062] In one embodiment, the lifting mechanism 60 includes a first motor 61, a lead screw and nut mechanism 62, a lifting frame 63, and a transverse frame 64. The frame 11 of the light box 10 is fixed below the lifting frame 63. The first motor 61 and the lead screw and nut mechanism 62 are mounted on the transverse frame 64. The first motor 61 drives the lead screw in the lead screw and nut mechanism 62 to rotate. The lead screw is arranged vertically. The lifting frame 63 and the transverse frame 64 are vertically connected by multiple cooperating first slide rail slider assemblies. The lifting frame 63 is connected to the nut in the lead screw and nut mechanism 62. When the first motor 61 rotates, it can drive the lifting frame 63 and the light box 10 to rise and fall through the lead screw and nut mechanism 62. The lifting mechanism 60 can also use belt drive or electric cylinder to drive the light box 10 to rise and fall.

[0063] In one embodiment, the transverse mechanism 70 includes a fixed frame 71, a second motor 72, a first drive wheel assembly, and a first belt 73 sleeved on the first drive wheel assembly. The first belt 73 is horizontally arranged. The second motor 72 drives the first belt 73 to rotate through the first drive wheel assembly. The transverse frame 64 and the fixed frame 71 in the lifting mechanism 60 are horizontally connected through a second slide rail slider assembly, and the transverse frame 64 and the first belt 73 are fixedly connected. That is, when the first belt 73 rotates, it can drive the transverse frame 64 to move horizontally. The light box 10 installed below the transverse frame 64 will also move horizontally to connect with the support platform 52 of the two support units. The transverse mechanism 70 can also use a screw and nut mechanism or an electric cylinder to drive the light box 10 to move horizontally.

[0064] In some embodiments, the moving mechanism 51 includes a first translation mechanism and a second translation mechanism. The support platform 52 is mounted on the drive end of the second translation mechanism. The second translation mechanism is configured to drive the support platform 52 to translate along the second direction Y. The second translation mechanism is mounted on the drive end of the first translation mechanism. The first translation mechanism is configured to drive the second translation mechanism and the support platform 52 to translate along the first direction X.

[0065] Welding station B and unloading station C are arranged on the moving path of the bearing platform 52 along the first direction X. The loading station A of the two bearing units is the same station, and the loading station A is located between the two bearing units. The loading station A is arranged on the moving path of the bearing platform 52 along the second direction Y.

[0066] The two carrier units share a single loading station A, meaning that the two carrier units can receive battery cells and welding strips, or battery strings, at the same station, which is quite convenient.

[0067] In one embodiment, the first translation mechanism includes a third motor, a second drive wheel assembly, a second belt 511, and a first seat 512. The second belt 511 is sleeved on the second drive wheel assembly and extends along the first direction X. The third motor drives the second belt 511 to rotate through the second drive wheel assembly. The first seat 512 is connected to the second belt 511. While the second belt 511 is rotating, it drives the first seat 512 to move along the first direction X. The second translation mechanism includes a fourth motor 513, a gear 514, a rack 515, and a second base 516. The second base 516 is slidably mounted on the first base 512 via a third slide rail slider assembly, with the sliding direction along the second direction Y. The fourth motor 513 and the support platform 52 are mounted on the second base 516, and the gear 514 is mounted on the output shaft of the fourth motor 513. The rack 515 is mounted on the first base 512 and extends along the second direction Y. The gear 514 and the rack 515 mesh. When the fourth motor 513 rotates, the gear 514 moves along the rack 515, thereby driving the second base 516 and the support platform 52 on it to move along the second direction Y. The first and second translation mechanisms can also adopt other structural forms such as a screw and nut mechanism or chain drive.

[0068] In some embodiments, the support unit further includes at least one heating element and at least one second temperature detection element, both of which are disposed in the support platform 52.

[0069] The heating element can heat the support platform 52 to preheat the battery strings on the support platform 52 before welding, thereby saving welding time and improving welding efficiency. The second temperature detection element is used to detect the temperature of the support platform 52, and then controls the heating element to continue heating or pause heating according to the detected temperature, so that the support platform 52 is kept within a suitable temperature range.

[0070] The foregoing has provided a sufficiently detailed and specific description of this application. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within the protection scope of this application. The scope of protection claimed in this application is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A welding apparatus, characterized in that: The welding device includes a blower, a lamp box, and at least one exhaust pipe. The lamp box includes a frame and lamp groups, a fan hood assembly, and at least one first temperature detection element disposed on the frame. The fan hood assembly covers the lamp groups. The first end of the exhaust pipe is fixed to the fan hood assembly and the two are connected. The second end of the exhaust pipe is connected to the exhaust port of the blower. The blower is configured to draw air from the area where the lamp groups are located through the exhaust pipe to cool it down. The first temperature detection element is configured to measure the temperature of the area where the lamp groups are located.

2. The welding apparatus as described in claim 1, characterized in that: The light box extends along a first direction, and the hood assembly includes at least two hood units arranged side by side along the first direction. All the hood units cover the light group, and each hood unit is connected to the exhaust pipe. The opening of the hood unit faces the light group, and the first end of the exhaust pipe is located at a position opposite to the opening of the hood unit.

3. The welding apparatus as described in claim 2, characterized in that: The light box includes a reflector, and multiple ventilation holes are evenly opened on the surface of the reflector. The reflector is disposed between the shroud assembly and the lamp group, or the reflector is disposed at the open end of the shroud unit; The reflector faces the lamp assembly, and the reflector is configured to reflect the light emitted by the lamp assembly.

4. The welding apparatus as described in claim 1, characterized in that: The welding device further includes a pressure pin assembly, which is mounted on the frame of the light box. The pressure pin assembly includes a plurality of elastic pressure pins arranged in a matrix. The light group includes at least two lamp tubes arranged side by side. At least one row of elastic pressure pins is arranged between two adjacent lamp tubes. The outer ends of the elastic pressure pins protrude beyond the lamp tubes.

5. The welding apparatus as described in claim 4, characterized in that: The light box extends along a first direction, the length direction of the lamp tube is along a second direction, all the lamp tubes are arranged side by side at intervals along the first direction, and the second direction is perpendicular to the first direction; The pressure pin assembly includes multiple pressure pin units, each pressure pin unit includes a mounting strip, on which a row of elastic pressure pins is disposed, the row of elastic pressure pins on the mounting strip is spaced apart along the second direction, the mounting strip is disposed on the frame of the light box, and at least one pressure pin unit is disposed between two adjacent light tubes; Alternatively, the pressure pin assembly includes a mounting plate on which a plurality of the elastic pressure pins are arranged in a matrix, and the mounting plate is disposed on the frame of the light box.

6. The welding apparatus as described in claim 1, characterized in that: The welding device includes at least one air blowing pipe, which is mounted on the frame of the lamp box. At least one air blowing hole is provided on the pipe wall of the air blowing pipe. The air blowing pipe is connected to an air source, and the gas from the air source is blown towards the outer area of ​​the lamp assembly through the air blowing hole of the air blowing pipe.

7. A battery string welding device, characterized in that: The battery string welding equipment includes a welding device as described in any one of claims 1-6 and at least one support unit; The carrying unit includes a moving mechanism and a carrying platform. The moving mechanism is configured to drive the carrying platform to move between a loading station, a welding station, and a unloading station. The carrying platform is used to carry battery strings. The welding device includes a lifting mechanism, the frame of the light box is mounted on the drive end of the lifting mechanism, the lifting mechanism is configured to drive the light box to rise and fall, the welding device is located above the welding station, and the light box of the welding device is configured to weld the battery string on the support platform of the welding station.

8. The battery string welding equipment as described in claim 7, characterized in that: There are two support units arranged side by side. The welding device includes a traversing mechanism and a lifting mechanism installed at the drive end of the traversing mechanism. The traversing mechanism is configured to drive the lifting mechanism and the light box to move between the welding stations of the two support units, so as to use the light box to alternately weld the battery strings at the welding stations of the two support units.

9. The battery string welding equipment as described in claim 8, characterized in that: The moving mechanism includes a first translation mechanism and a second translation mechanism. The carrying platform is mounted on the drive end of the second translation mechanism. The second translation mechanism is configured to drive the carrying platform to translate along the second direction. The second translation mechanism is mounted on the drive end of the first translation mechanism. The first translation mechanism is configured to drive the second translation mechanism and the carrying platform to translate along the first direction. The welding station and the unloading station are arranged on the moving path of the bearing platform along the first direction. The loading station of the two bearing units is the same station and is located between the two bearing units. The loading station is arranged on the moving path of the bearing platform along the second direction.

10. The battery string welding equipment as described in claim 7, characterized in that: The support unit further includes at least one heating element and at least one second temperature detection element, both of which are disposed in the support platform.

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