Lamp box and welding device

Abstract

The utility model discloses a lamp box and a welding device, and belongs to the technical field of batteries. The lamp box comprises a plurality of light-emitting units, and the light-emitting units comprise at least one first light-emitting unit and at least one second light-emitting unit. The first light-emitting units are configured to cure glue points on battery pieces. The distance between the center of the glue point and the irradiation center of at least one first light-emitting unit is smaller than the target distance; and the second light-emitting unit is configured to weld the battery piece with a welding strip. The glue point curing effect can be improved, the equipment cost is reduced, the production time is saved, and the production efficiency is reduced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a light box and a welding device. Background Art

[0002] Photovoltaic cells are clean energy devices that convert solar energy directly into electrical energy. The core part is the photovoltaic cell. Photovoltaic cells need to be connected together through interconnection technology to increase output power. At present, the interconnection technology of busbar-free photovoltaic cells is mainly to first irradiate the photocuring glue on the cell with an ultraviolet light box to cure it, and then weld the cell with an infrared light box. However, this interconnection technology requires two different light boxes, which increases equipment costs, and curing and welding need to be completed in two steps, which increases production time and reduces production efficiency. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a light box and a welding device, which can improve the curing effect of glue points, reduce equipment costs, save production time, and improve production efficiency.

[0004] In a first aspect, the present application provides a light box, comprising a plurality of light-emitting units, wherein the plurality of light-emitting units include at least one first light-emitting unit and at least one second light-emitting unit:

[0005] The first light-emitting unit is configured to cure a glue spot on the cell sheet, and the distance between the center of the glue spot and the irradiation center of at least one of the first light-emitting units is smaller than the target distance;

[0006] The second light emitting unit is configured to weld the battery cell to a welding ribbon.

[0007] According to the light box of the present application, by simultaneously arranging the first light-emitting unit and the second light-emitting unit in the light box, the first light-emitting unit irradiates the glue spots on the battery cells to solidify the glue spots, and at the same time the second light-emitting unit heats the battery cells to weld the battery cells to the welding strips. There is no need to set up two light boxes, which greatly simplifies the equipment structure and reduces the equipment cost. In addition, the distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit is smaller than the target distance, which ensures the irradiation effect of the first light-emitting unit on the glue spot, thereby improving the curing effect of the glue spot. Moreover, welding and curing are completed simultaneously in one light box without the need to be completed in two steps, which greatly improves production efficiency and saves production time.

[0008] According to an embodiment of the present application, the target distance is less than or equal to the sum of an irradiation radius of the first light-emitting unit and a radius of the glue dot.

[0009] According to one embodiment of the present application, the target distance is 5 mm.

[0010] According to one embodiment of the present application, the plurality of light emitting units are distributed in an array.

[0011] According to one embodiment of the present application, the plurality of light emitting units are distributed in an array of multiple rows and columns;

[0012] In each row of light-emitting units, the first light-emitting units and the second light-emitting units are alternately distributed;

[0013] Each column of light-emitting units is the same type of light-emitting units, or, in each column of light-emitting units, the first light-emitting units and the second light-emitting units are alternately distributed.

[0014] According to one embodiment of the present application, the first light-emitting unit includes an ultraviolet LED, and the second light-emitting unit includes an infrared LED.

[0015] According to one embodiment of the present application, the light box further includes a heat dissipation substrate;

[0016] The plurality of light emitting units are located on the heat dissipation substrate.

[0017] According to one embodiment of the present application, the light box further includes a water cooling pipeline structure;

[0018] The water cooling pipeline structure is located on a side of the heat dissipation substrate away from the light emitting unit.

[0019] According to one embodiment of the present application, the light box further includes a circuit board;

[0020] The circuit board is located on a side of the water cooling pipeline structure away from the heat dissipation substrate, and the plurality of light emitting units are electrically connected to the circuit board.

[0021] In a second aspect, the present application provides a welding device, including a transmission mechanism and the light box described in the first aspect above;

[0022] The transmission mechanism is configured to transmit the battery sheet to the light box;

[0023] The light box is configured to solidify the glue spots on the battery cell and weld the battery cell to the welding ribbon at the same time.

[0024] According to the welding device of the present application, by simultaneously arranging the first light-emitting unit and the second light-emitting unit in the light box, the first light-emitting unit irradiates the glue spots on the battery cell to solidify the glue spots, and at the same time the second light-emitting unit heats the battery cell to weld the battery cell to the welding strip. There is no need to set up two light boxes, which greatly simplifies the equipment structure and reduces the equipment cost. In addition, the distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit is smaller than the target distance, which ensures the irradiation effect of the first light-emitting unit on the glue spot, thereby improving the curing effect of the glue spot. Moreover, welding and curing are completed simultaneously in one light box without the need to be completed in two steps, which greatly improves production efficiency and saves production time.

[0025] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0026] By simultaneously arranging the first light-emitting unit and the second light-emitting unit in the light box, the first light-emitting unit irradiates the glue spots on the battery cell to solidify the glue spots, and at the same time the second light-emitting unit heats the battery cell to weld the battery cell to the welding strip. There is no need to set up two light boxes, which greatly simplifies the equipment structure and reduces the equipment cost. In addition, the distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit is smaller than the target distance, thereby ensuring the irradiation effect of the first light-emitting unit on the glue spot, thereby improving the curing effect of the glue spot. Moreover, welding and curing are completed simultaneously in one light box without having to be completed in two steps, which greatly improves production efficiency and saves production time.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 It is one of the structural schematic diagrams of the light box provided in the embodiment of the present application;

[0030] Figure 2 This is the second structural schematic diagram of the light box provided in the embodiment of the present application;

[0031] Figure 3 This is the third structural schematic diagram of the light box provided in the embodiment of the present application;

[0032] Figure 4 This is the fourth structural schematic diagram of the light box provided in the embodiment of the present application;

[0033] Figure 5 It is a schematic diagram of the structure of the welding device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0035] The light box and welding device provided in the embodiments of the present application are described below with reference to the accompanying drawings.

[0036] Figure 1 This is a schematic diagram of the structure of the light box provided in an embodiment of the present application.

[0037] like Figure 1 As shown, the light box provided in the embodiment of the present application includes a plurality of light emitting units 1, and the plurality of light emitting units 1 include at least one first light emitting unit 1a and at least one second light emitting unit 1b. The light emitted by the first light emitting unit 1a and the second light emitting unit 1b are different.

[0038] The first light-emitting unit 1a is configured to cure the glue spots on the cell. The cell has glue spots, which are curing glue. The glue spots on the cell need to be cured to bond the cell to the solder strip. When the cell is transferred to the light box, the first light-emitting unit 1a emits light to cure the glue spots on the cell to bond the cell to the solder strip.

[0039] The distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit 1a is less than the target distance. The irradiation center of the first light-emitting unit 1a refers to the center point of the irradiation area after the light emitted by the first light-emitting unit 1a irradiates the battery cell. The target distance can be set in advance. The target distance can be set smaller so that the center of the glue spot coincides with the irradiation center of the corresponding first light-emitting unit 1a as much as possible to ensure the irradiation effect of the first light-emitting unit 1a on the glue spot, improve the curing effect of the glue spot, and further improve the bonding effect between the battery cell and the solder strip.

[0040] The cell may have one or more glue dots, and the number of the first light-emitting units 1a is greater than or equal to the number of glue dots on the cell, so that each glue dot corresponds to at least one first light-emitting unit 1a. The distance between the center of each glue dot and the irradiation center of each corresponding first light-emitting unit 1a is less than the target distance. It should be noted that the number of first light-emitting units 1a corresponding to each glue dot may be the same or different. The distance between the center of each glue dot and the irradiation center of the corresponding first light-emitting unit 1a may be the same or different.

[0041] When the number of first light-emitting units 1a is greater than the number of glue dots on the battery cell, each first light-emitting unit 1a may correspond to a glue dot, or only some of the first light-emitting units 1a may correspond to a glue dot, while another part of the first light-emitting units 1a may not correspond to any glue dot, that is, the distance between the irradiation center of another part of the first light-emitting units 1a and the center of each glue dot is greater than the target distance.

[0042] The second light-emitting unit 1b is configured to weld the cell. The cell may be a main grid-less photovoltaic cell, and the cell also has fine grid lines, which need to be welded to the welding ribbon. When the cell is transferred to the light box, the second light-emitting unit 1b emits light to heat the cell so that the fine grid lines on the cell are welded to the welding ribbon.

[0043] It should be noted that the first light-emitting unit 1a and the second light-emitting unit 1b in the light box can work at the same time, that is, when the battery cell is transmitted to the light box, the first light-emitting unit 1a and the second light-emitting unit 1b emit light at the same time. The light emitted by the first light-emitting unit 1a solidifies the glue point on the battery cell, and the light emitted by the second light-emitting unit 1b welds the battery cell to the welding strip, that is, the battery cell can be cured and welded at the light box at the same time, without having to be completed in two steps, reducing the complexity of the operation, greatly improving production efficiency, and saving production time. Moreover, the first light-emitting unit 1a and the second light-emitting unit 1b are located in the same light box, and there is no need to set up two light boxes, which greatly simplifies the equipment structure and reduces equipment costs.

[0044] In some embodiments, the target distance is less than or equal to the sum of the irradiation radius of the first light-emitting unit 1a and the radius of the glue point. The area irradiated by the first light-emitting unit 1a on the cell (irradiation area) is circular, and the irradiation radius of the first light-emitting unit 1a is the radius of the irradiation area. The cross-section of the glue point is also circular, and the radius of the glue point is the radius of the cross-section of the glue point.

[0045] The distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit 1a is smaller than the sum of the irradiation radius of the first light-emitting unit 1a and the radius of the glue spot, so that the irradiation area of ​​at least one first light-emitting unit 1a overlaps with the glue spot, that is, at least one first light-emitting unit 1a can irradiate the glue spot, so as to improve the curing effect of the glue spot, thereby improving the bonding effect between the battery cell and the solder strip.

[0046] In some embodiments, the target distance is 5 mm. For example, if the radius of the glue dot is 4 mm, and the irradiation radius of the first light-emitting unit 1a is 2.5 mm, the target distance can be set to 5 mm so that the center of the glue dot coincides with the irradiation center of the corresponding first light-emitting unit 1a as much as possible, thereby improving the irradiation effect of the first light-emitting unit 1a on the glue dot and further improving the curing effect of the glue dot.

[0047] In some embodiments, the light emitting unit 1 is an LED chip, the first light emitting unit 1a is an ultraviolet LED, and the second light emitting unit 1b is an infrared LED. The first light emitting unit 1a is used to emit ultraviolet rays, and the second light emitting unit 1b is used to emit infrared rays.

[0048] When the cell is transferred to the light box, the light box emits ultraviolet rays and infrared rays at the same time, that is, the first light-emitting unit 1a emits ultraviolet rays, and the second light-emitting unit 1b emits infrared rays. The ultraviolet rays emitted by the first light-emitting unit 1a irradiate the glue points on the cell to solidify the glue points, and the infrared rays emitted by the second light-emitting unit 1b irradiate the welding points on the cell to weld the cell to the welding ribbon, thereby achieving curing and welding at the same time.

[0049] The light box in the related art uses quartz lamps to weld the battery cells. The service life of the quartz lamps is about 5,000 hours. If the lamp is damaged, it is necessary to stop the machine for replacement, which affects the workshop capacity. This embodiment uses LED chips as light-emitting units. The service life of the LED chips is about 30,000 hours, which is 6 times the service life of the quartz lamps. That is, the service life of the LED chips in this embodiment is longer, and the probability of stopping the machine for replacement due to damage of the LED chips is lower, which helps to improve the workshop capacity.

[0050] It should be noted that the light-emitting unit 1 may also be other types of light-emitting devices, which are not specifically limited here. The first light-emitting unit 1a may also be a light-emitting device that emits other types of light, as long as it can solidify the glue points on the battery cell, which is not specifically limited here. The second light-emitting unit 1b may also be a light-emitting device that emits other types of light, as long as it can weld the battery cell and the welding strip, which is not specifically limited here.

[0051] In some embodiments, the multiple light emitting units 1 have the same size, for example, the size of the light emitting unit 1 is 3.5 mm*3.5 mm or 5 mm*5 mm.

[0052] In some embodiments, the plurality of light-emitting units 1 are distributed in an array. The plurality of light-emitting units 1 (including the first light-emitting unit 1a and the second light-emitting unit 1b) may be distributed in a row and multiple columns, or in multiple rows and one column, or in multiple rows and multiple columns. The distribution of the plurality of light-emitting units 1 may be set according to the size of the battery cell and the size of the light-emitting unit, etc., to ensure that the plurality of light-emitting units 1 can simultaneously solidify the glue points on the battery cell and weld the battery cell and the welding strip, which is not specifically limited here.

[0053] In some embodiments, the plurality of light emitting units 1 are arranged in an array of multiple rows and columns. Figure 2 and Figure 3As shown, in each row of light-emitting units, the first light-emitting units 1a and the second light-emitting units 1b are alternately distributed, that is, in each row of light-emitting units, there is a second light-emitting unit 1b between two adjacent first light-emitting units 1a, and there is a first light-emitting unit 1a between two adjacent second light-emitting units 1b. The first light-emitting unit 1 in each row of light-emitting units can be the first light-emitting unit 1a or the second light-emitting unit 1b. The alternation method of light-emitting units in different rows can be the same or different, that is, the first light-emitting units of light-emitting units in different rows can be the same or different.

[0054] In some embodiments, Figure 2 As shown, each column of light-emitting units 1 can be the same type of light-emitting units, that is, all light-emitting units in a column are first light-emitting units 1a, or all light-emitting units in a column are second light-emitting units 1b. Moreover, in each row of light-emitting units, the first light-emitting units 1a and the second light-emitting units 1b are alternately distributed, so that there is a column of second light-emitting units 1b between two adjacent columns of first light-emitting units 1a, and there is a column of first light-emitting units 1a between two adjacent columns of second light-emitting units 1b.

[0055] In some embodiments, Figure 3 As shown, in each column of light-emitting units 1, the first light-emitting units 1a and the second light-emitting units 1b are alternately distributed, that is, in each column of light-emitting units 1, there is a second light-emitting unit 1b between two adjacent first light-emitting units 1a, and there is a first light-emitting unit 1a between two adjacent second light-emitting units 1b. Moreover, in each row of light-emitting units, the first light-emitting units 1a and the second light-emitting units 1b are alternately distributed, so that a plurality of first light-emitting units 1a are evenly distributed, and a plurality of second light-emitting units 1b are evenly distributed. Among them, the four sides of each first light-emitting unit 1a (such as Figure 3 The top, bottom, left and right (in the figure) are all second light-emitting units 1b, and the surroundings of each second light-emitting unit 1b are all first light-emitting units 1a.

[0056] In this embodiment, the first light-emitting units 1a are evenly distributed, so that the light (such as ultraviolet rays) emitted by the first light-emitting units 1a evenly irradiate the glue points on the battery cells, which facilitates the curing of the glue points. The second light-emitting units 1b are evenly distributed, so that the light (such as infrared rays) emitted by the second light-emitting units 1b evenly irradiate the interior of the light box, thereby making the ambient temperature inside the light box balanced, improving the uniformity of welding between the battery cells and the welding strips, and thus improving the welding quality.

[0057] In some embodiments, Figure 4As shown, the light box may further include a heat dissipation substrate 2, and a plurality of light-emitting units 1 are located on the heat dissipation substrate 2. The plurality of light-emitting units 1 may be distributed in an array on the heat dissipation substrate 2. It should be noted that the plurality of light-emitting units 1 are arranged toward the battery cell, and the heat dissipation substrate 2 is located on the side of the light-emitting unit 1 away from the battery cell. The heat dissipation substrate 2 is used to dissipate heat for the plurality of light-emitting units 1. The heat dissipation substrate 2 may include metal (such as copper), ceramic, etc.

[0058] In some embodiments, Figure 4 As shown, the light box may further include a water cooling pipe structure 3, which is located on the side of the heat dissipation substrate 2 away from the light emitting unit 1. The water cooling pipe structure 3 is used to dissipate heat from the light box. This embodiment uses the water cooling pipe structure 3 to dissipate heat, so that the heat dissipation efficiency of the light box is more efficient.

[0059] In some embodiments, Figure 4 As shown, the light box may further include a circuit board (PCB) 4, which is located on the side of the water-cooling pipe structure 3 away from the heat dissipation substrate 2, and the plurality of light-emitting units 1 are electrically connected to the circuit board 4. The plurality of light-emitting units 1 are electrically connected to the circuit board 4 after being connected in series and / or in parallel. The circuit board 4 may control the plurality of light-emitting units 1 to start or stop working, and the circuit board 4 may also control the power of the light-emitting units 1 to optimize the curing effect of the glue points on the battery cell and the welding effect between the battery cell and the solder strip.

[0060] In some embodiments, Figure 4 As shown, the light box may further include a summary wiring port 5, which is located on the heat dissipation substrate 2, and the summary wiring port 5 and the plurality of light-emitting units 1 are located on the same side of the heat dissipation substrate 2. The plurality of light-emitting units 1 are electrically connected to the summary wiring port 5 after being connected in series and / or in parallel, and the summary wiring port 5 is electrically connected to the circuit board 4, that is, the plurality of light-emitting units 1 are electrically connected to the circuit board 4 through the summary wiring port 5.

[0061] The number of the aggregate wiring ports 5 may be one or more. The aggregate wiring ports 5 are located on at least one side of the plurality of light emitting units 1. In the case where there are a plurality of aggregate wiring ports 5, the plurality of aggregate wiring ports 5 may be located around the plurality of light emitting units 1, so that the plurality of light emitting units 1 are electrically connected to the circuit board 4 through the aggregate wiring ports 5.

[0062] According to the light box provided in the embodiment of the present application, by simultaneously arranging the first light-emitting unit 1a and the second light-emitting unit 1b in the light box, the first light-emitting unit 1a irradiates the glue spots on the battery cells to solidify the glue spots, and at the same time the second light-emitting unit 1b heats the battery cells to weld the battery cells to the welding strips. There is no need to set up two light boxes, which greatly simplifies the equipment structure and reduces the equipment cost. In addition, the distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit 1a is smaller than the target distance, which ensures the irradiation effect of the first light-emitting unit 1a on the glue spot, thereby improving the curing effect of the glue spot. Moreover, welding and curing are completed simultaneously in one light box without the need to be completed in two steps, which greatly improves production efficiency and saves production time.

[0063] Correspondingly, an embodiment of the present application also provides a welding device.

[0064] like Figure 5 As shown, the welding device provided in the embodiment of the present application includes a transmission structure 10 and a light box 20. The transmission mechanism 10 is configured to transmit the battery cell 30 to the light box 20, and the light box 20 is configured to solidify the glue points on the battery cell 30 and weld the battery cell 30 to the welding ribbon. Among them, the length of the light box 20 along the transmission direction of the battery cell 30 can be set according to the welding method of the battery cell 30, which is not specifically limited here. For example, for a welding method of one piece per weld, the length of the light box 20 along the transmission direction can be equal to the length of one battery cell 30 along the transmission direction; for a welding method of multiple pieces per weld, the length of the light box 20 along the transmission direction can be equal to the overall length of multiple battery cells 30 along the transmission direction.

[0065] Combination Figures 1 to 3 As shown, the light box 20 includes a plurality of light emitting units 1, and the plurality of light emitting units 1 include at least one first light emitting unit 1a and at least one second light emitting unit 1b. The first light emitting unit 1a is configured to cure the glue point on the battery cell, and the distance between the center of the glue point and the irradiation center of at least one first light emitting unit 1a is less than the target distance. The second light emitting unit 1b is configured to weld the battery cell.

[0066] When the transmission mechanism 10 transmits the battery cell 30 to the light box 20, the first light-emitting unit 1a and the second light-emitting unit 1b in the light box 20 can work at the same time, that is, the first light-emitting unit 1a and the second light-emitting unit 1b emit light at the same time, the light emitted by the first light-emitting unit 1a solidifies the glue point on the battery cell 30, and the light emitted by the second light-emitting unit 1b welds the battery cell 30 to the welding strip, that is, the battery cell 30 can be cured and welded at the light box at the same time, greatly improving production efficiency and saving production time. Moreover, the first light-emitting unit 1a and the second light-emitting unit 1b are located in the same light box, which greatly simplifies the equipment structure and reduces equipment costs.

[0067] In some embodiments, the target distance is less than or equal to the sum of an irradiation radius of the first light emitting unit and a radius of the glue dot.

[0068] In some embodiments, the target distance is 5 mm.

[0069] In some embodiments, the plurality of light emitting units 1 are distributed in an array.

[0070] In some embodiments, the plurality of light emitting units 1 are distributed in an array of multiple rows and columns;

[0071] In each row of light-emitting units 1, the first light-emitting units 1a and the second light-emitting units 1b are alternately distributed;

[0072] Each column of light-emitting units 1 is the same type of light-emitting units, or, in each column of light-emitting units 1 , the first light-emitting units 1 a and the second light-emitting units 1 b are alternately distributed.

[0073] In some embodiments, the first light emitting unit 1a includes an ultraviolet LED, and the second light emitting unit 1b includes an infrared LED.

[0074] In some embodiments, the light box further includes a heat dissipation substrate 2;

[0075] The plurality of light emitting units 1 are located on the heat dissipation substrate 2 .

[0076] In some embodiments, the light box further includes a water cooling pipeline structure 3;

[0077] The water cooling pipeline structure 3 is located on a side of the heat dissipation substrate 2 away from the light emitting unit 1 .

[0078] In some embodiments, the light box further comprises a circuit board 4;

[0079] The circuit board 4 is located on a side of the water-cooling pipe structure 3 away from the heat dissipation substrate 2 , and the plurality of light-emitting units 1 are electrically connected to the circuit board 4 .

[0080] According to the welding device provided in the embodiment of the present application, by simultaneously arranging the first light-emitting unit and the second light-emitting unit in the light box, the first light-emitting unit irradiates the glue spots on the battery cells to solidify the glue spots, and at the same time the second light-emitting unit heats the battery cells to weld the battery cells to the welding strips. There is no need to set up two light boxes, which greatly simplifies the equipment structure and reduces the equipment cost. In addition, the distance between the center of the glue spot and the irradiation center of at least one first light-emitting unit is less than the target distance, which ensures the irradiation effect of the first light-emitting unit on the glue spot, thereby improving the curing effect of the glue spot. Moreover, welding and curing are completed simultaneously in one light box without the need to be completed in two steps, which greatly improves production efficiency and saves production time.

[0081] The terms "first", "second", etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0082] In the description of the present application, “plurality” means two or more.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A light box, characterized in that: Comprising a plurality of light emitting units, the plurality of light emitting units comprising at least one first light emitting unit and at least one second light emitting unit: The first light-emitting unit is configured to cure a glue spot on the cell sheet, and the distance between the center of the glue spot and the irradiation center of at least one of the first light-emitting units is smaller than the target distance; The second light emitting unit is configured to weld the battery cell to a welding ribbon.

2. The light box according to claim 1, characterized in that: The target distance is less than or equal to the sum of an irradiation radius of the first light emitting unit and a radius of the glue dot.

3. The light box according to claim 1, characterized in that: The target distance is 5 mm.

4. The light box according to claim 1, characterized in that: The plurality of light emitting units are distributed in an array.

5. The light box according to claim 4, characterized in that: The plurality of light emitting units are distributed in an array of multiple rows and columns; In each row of light-emitting units, the first light-emitting units and the second light-emitting units are alternately distributed; Each column of light-emitting units is the same type of light-emitting units, or, in each column of light-emitting units, the first light-emitting units and the second light-emitting units are alternately distributed.

6. The light box according to claim 1, characterized in that: The first light emitting unit includes an ultraviolet LED, and the second light emitting unit includes an infrared LED.

7. The light box according to any one of claims 1 to 6, characterized in that: The light box also includes a heat dissipation substrate; The plurality of light emitting units are located on the heat dissipation substrate.

8. The light box according to claim 7, characterized in that: The light box also includes a water cooling pipeline structure; The water cooling pipeline structure is located on a side of the heat dissipation substrate away from the light emitting unit.

9. The light box according to claim 8, characterized in that: The light box also includes a circuit board; The circuit board is located on a side of the water cooling pipeline structure away from the heat dissipation substrate, and the plurality of light emitting units are electrically connected to the circuit board.

10. A welding device, characterized in that: It comprises a transmission mechanism and a light box as claimed in any one of claims 1 to 9; The transmission mechanism is configured to transmit the battery sheet to the light box; The light box is configured to solidify the glue spots on the battery cell and weld the battery cell to the welding ribbon at the same time.

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