Drying device for heterojunction solar cell production

Abstract

The invention provides a drying device for heterojunction solar cell production, and relates to the technical field of heterojunction cell screen printing auxiliary equipment.The drying device comprises a first conveying line, a second conveying line and a heating lamp tube, and the first conveying line is suitable for conveying cell pieces in the conveying direction; the second conveying line and the first conveying line are arranged at intervals in the height direction, the extending directions of the second conveying line and the first conveying line are consistent, the multiple heating lamp tubes are arranged on the second conveying line in the extending direction of the second conveying line, and the heating lamp tubes are connected with the second conveying line and extend in the first direction. The first direction, the height direction and the conveying direction are perpendicular in pairs, and the second conveying line is suitable for pulling the heating lamp tube to rotate in the conveying direction so as to dry grid line silver paste on the battery piece. According to the invention, the grid line silver paste on the battery piece can be uniformly dried, so that the drying effect of the battery piece is ensured, and the drying efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of screen printing auxiliary equipment for heterojunction batteries, and in particular to a drying device for producing heterojunction solar cells. Background Art

[0002] Heterojunction cells are N-type single crystal bifacial cells with advantages such as simple process, high power generation and low cost per kilowatt-hour. Therefore, the market share of heterojunction cells in the field of solar cells has gradually increased. Heterojunction solar cells need to form electrode grid lines through screen printing, and then the cell sheets printed with grid line silver paste are sent to the oven and sintering furnace by the transmission belt for drying and sintering process to form solid grid lines. However, the drying device in the related art has a poor drying effect on the grid line silver paste on the cell sheet, and the drying efficiency is low, which affects the screen printing production efficiency of heterojunction cells. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a drying device for heterojunction solar cell production, which can evenly dry the grid line silver paste on the cell to ensure the drying effect of the cell and improve the drying efficiency.

[0005] According to an embodiment of the present invention, a drying device for producing heterojunction solar cells comprises a first conveyor line, a second conveyor line and heating lamps, wherein the first conveyor line is suitable for conveying solar cells along a conveying direction; the second conveyor line and the first conveyor line are arranged at intervals along a height direction and the extension directions of the two are consistent, a plurality of the heating lamps are arranged on the second conveyor line along its extension direction, the heating lamps are connected to the second conveyor line and extend along a first direction, the first direction, the height direction and the conveying direction are perpendicular to each other, and the second conveyor line is suitable for pulling the heating lamps to rotate along the conveying direction so as to dry the grid line silver paste on the solar cells.

[0006] According to the drying device for heterojunction solar cell production according to the embodiment of the present invention, the first conveyor line can convey the cell to be dried to the heating lamp tube, so that the heat generated by the heating lamp tube can be used to dry the silver paste of the grid line on the cell cell. During the drying process, the second conveyor line rotates along the conveying direction with the heating lamp tube, so that each heating lamp tube can take turns to dry the grid line on the same cell cell, which can effectively avoid the influence of the heat difference between the heating lamp tubes on the drying quality of the cell cell, and realize uniform heating of the surface of the cell cell to ensure the consistency of the grid line forming on the cell cell. Therefore, compared with the related art, the present invention can uniformly dry the silver paste of the grid line on the cell cell to ensure the drying effect of the cell cell and improve the drying efficiency.

[0007] In some embodiments, the second conveying line includes a first conveying body and a second conveying body arranged at intervals along the first direction, and the first conveying body and the second conveying body rotate at the same speed;

[0008] The heating lamp tube includes a first section, a heating section, and a second section which are connected in sequence, at least a portion of the first section is connected to the first conveying body, and at least a portion of the second section is connected to the second conveying body. On the projection plane perpendicular to the height direction, the projection of the heating section is completely located between the projection of the first conveying body and the projection of the second conveying body.

[0009] In some embodiments, the length of the heating section is not less than the length of the battery cell in the first direction.

[0010] In some embodiments, the arrangement area of ​​all the heating lamps on the second conveyor line is defined as the coverage area of ​​all the heating lamps, and on the projection plane perpendicular to the height direction, the projection area of ​​the coverage area of ​​all the heating lamps is not less than the projection area of ​​the battery cell.

[0011] In some embodiments, a clamping structure is provided between the heating lamp tube and the second conveying line, and the clamping structure includes a clamping member and a clamping seat, one of the clamping member and the clamping seat is provided on the heating lamp tube, and the other is provided on the second conveying line.

[0012] In some embodiments, the clamping seat is provided with a clamping cavity, and the clamping member includes a connected mounting portion and an elastic portion, the mounting portion is connected to any one of the heating lamp tube and the second conveying line, the elastic portion has a first critical state and a second critical state, and the elastic portion is elastically deformed when switching from the first critical state to the second critical state so that the elastic portion can slide along the clamping cavity, and the elastic portion can rebound from the second critical state to the first critical state to press against the clamping cavity.

[0013] In some embodiments, the mounting portion is connected to the heating lamp tube, and a heat dissipation hole is provided on the mounting portion. There are a plurality of heat dissipation holes and the heat dissipation holes are arranged in an array on the mounting portion.

[0014] In some embodiments, the drying device further comprises a casing, wherein the casing is mounted above the first conveyor line, and on a projection plane perpendicular to the height direction, an outer contour of the projection of the second conveyor line is located inside an outer contour of the projection of the casing.

[0015] In some embodiments, the first conveying body and the second conveying body both include a driving wheel and a driven wheel, the driving wheel and the driven wheel are connected via a transmission belt, the driving wheel of the first conveying body and the driving wheel of the second conveying body are coaxially connected, and the driven wheel of the first conveying body and the driven wheel of the second conveying body are coaxially connected;

[0016] The second conveying line further includes a first motor, which is drivingly connected to any one of a driving wheel of the first conveying body and a driving wheel of the second conveying body.

[0017] In some embodiments, the second conveyor line is located above the first conveyor line, and the drying device also includes a third conveyor line and a flipping assembly. The third conveyor line, the flipping assembly and the first conveyor line are arranged in sequence along the conveying direction. The third conveyor line is provided with a printer and is used to convey the battery cells. The printer is suitable for printing grid lines on the battery cells. The flipping assembly is used to flip the battery cells so that the wall surface of the battery cell with the grid lines printed thereon is flipped 180°.

[0018] In some embodiments, the first conveyor line includes a base, a first rotating shaft, a second rotating shaft and a second motor.

[0019] Wherein, the first rotating shaft and the second rotating shaft are arranged on the base at intervals along the conveying direction and are both pivotally connected to the base, the first rotating shaft and the second rotating shaft are connected by a first transmission belt, the first transmission belt has two and are arranged at intervals along the first direction, the battery sheet is located on the top surface of the first transmission belt and is suitable for contacting at least a portion of each of the first transmission belts;

[0020] Wherein, the second motor is mounted on the base and is transmission-connected to the first rotating shaft.

[0021] In some embodiments, the flip assembly includes a first flip body, a second flip body and a spacing adjustment mechanism.

[0022] The first flip body and the second flip body are arranged at intervals along the first direction, and at least a portion of the battery sheet can contact each of the first flip body and the second flip body;

[0023] Wherein, the distance adjustment mechanism is connected to the first flip body and the second flip body so as to adjust the distance between the first flip body and the second flip body along the first direction.

[0024] In some embodiments, the first flip body and the second flip body each include a support seat, a support shaft, a third motor and a plurality of flip blades.

[0025] Wherein, the support seat is connected to the spacing adjustment mechanism, the support shaft is pivotally connected to the support seat along the first direction, and the third motor is mounted on the support seat and is transmission-connected to the support shaft;

[0026] Among them, the multiple flip leaves are connected to the support shaft and are arranged at equal intervals along the circumference of the support shaft. A receiving groove is jointly defined between any two adjacent flip leaves and the outer peripheral wall of the support shaft, and at least part of the battery cell is suitable for being slidably connected to the receiving groove.

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

[0028] Figure 1 It is a schematic structural diagram of a drying device for producing heterojunction solar cells according to an embodiment of the present invention.

[0029] Figure 2 It is a schematic diagram of the explosion structure between the first conveyor line, the second conveyor line and the heating lamp tube in the drying device for producing heterojunction solar cells according to an embodiment of the present invention.

[0030] Figure 3 It is a schematic structural diagram of the second conveyor line in the drying device for producing heterojunction solar cells according to an embodiment of the present invention.

[0031] Figure 4 It is a structural schematic diagram of a clamping structure in a drying device for producing heterojunction solar cells according to an embodiment of the present invention.

[0032] Figure numerals: 1. first conveyor line, 11. base, 12. first rotating shaft, 13. second rotating shaft, 14. second motor, 15. first transmission belt, 2. second conveyor line, 21. first conveying body, 211. driving wheel, 212. driven wheel, 22. second conveying body, 23. first motor, 3. heating lamp tube, 31. first section, 32. heating section, 33. second section, 4. clamping structure, 41. clamping piece, 411. mounting portion, 4111. heat dissipation hole, 412. elastic portion, 42. clamping seat, 421. clamping chamber, 5. casing, 6. third conveyor line, 7. flipping assembly, 71. first flipping body, 711. supporting seat, 712. supporting shaft, 713. third motor, 714. flipping leaf, 72. second flipping body, 73. spacing adjustment mechanism. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figure 2 As shown, a drying device for heterojunction solar cell production according to an embodiment of the present invention comprises a first conveyor line 1, a second conveyor line 2 and a heating lamp tube 3. The first conveyor line 1 is suitable for conveying cells along a conveying direction; the second conveyor line 2 and the first conveyor line 1 are arranged at intervals along a height direction and the extension directions of the two are consistent. A plurality of heating lamp tubes 3 are arranged along the extension direction of the second conveyor line 2. The heating lamp tubes 3 are connected to the second conveyor line 2 and extend along a first direction. The first direction, the height direction and the conveying direction are perpendicular to each other. The second conveyor line 2 is suitable for pulling the heating lamp tube 3 to rotate along the conveying direction so as to dry the grid line silver paste on the cell. The second conveyor line 2 and the plurality of heating lamp tubes 3 cooperate to form a drying structure for the cell.

[0035] It can be understood that according to the drying device for heterojunction solar cell production according to the embodiment of the present invention, the first conveyor line 1 can convey the cell to be dried to the heating lamp tube 3, so that the heat generated by the heating lamp tube 3 can be used to dry the silver paste of the grid line on the cell. During the drying process, the second conveyor line 2 rotates along the conveying direction with the heating lamp tube 3, so that each heating lamp tube 3 can take turns to dry the grid line on the same cell. The influence of the heat difference between the heating lamp tubes 3 on the drying quality of the cell can be effectively avoided, and uniform heating of the surface of the cell can be achieved to ensure the consistency of the grid line forming on the cell. Therefore, compared with the related art, the present invention can evenly dry the silver paste of the grid line on the cell to ensure the drying effect of the cell and improve the drying efficiency.

[0036] Specifically, the conveying direction may be the front-to-back direction in the figure. The height direction may be the up-down direction in the figure. The first direction may be the left-right direction in the figure. The thickness direction of the battery cell is consistent with the height direction. The second conveyor line 2 may be located above the first conveyor line 1, or the second conveyor line 2 may be located below the first conveyor line 1. The specific layout position of the second conveyor line 2 may be determined according to the actual layout conditions of the device on the site, and the orientation of the grid line silver paste on the battery cell relative to the first conveyor line 1 (i.e., whether the grid line silver paste faces the first conveyor line 1 or faces away from the first conveyor line 1). Both the first conveyor line 1 and the second conveyor line 2 may be high temperature resistant conveyor lines.

[0037] like Figure 2 and Figure 3As shown, in some embodiments, the second conveying line 2 includes a first conveying body 21 and a second conveying body 22 arranged at intervals along the first direction, and the first conveying body 21 and the second conveying body 22 rotate at the same speed, that is, the first conveying body 21 and the second conveying body 22 can convey at the same speed.

[0038] The heating lamp tube 3 includes a first section 31, a heating section 32 and a second section 33 which are connected in sequence. At least a portion of the first section 31 is connected to the first conveying body 21, and at least a portion of the second section 33 is connected to the second conveying body 22. On the projection plane in the vertical height direction, the projection of the heating section 32 is completely located between the projection of the first conveying body 21 and the projection of the second conveying body 22, that is, the heating section 32 is suspended between the first conveying body 21 and the second conveying body 22.

[0039] It can be understood that since the heating section 32 is completely suspended between the first conveying body 21 and the second conveying body 22, the heat generated by the heating section 32 can directly act on the battery cell. Therefore, compared with the structure in which the heating section 32 is in contact with the first conveying body 21 and the second conveying body 22, part of the heat needs to pass through both before acting on the battery cell. In the present invention, the heating sections 32 of all heating lamps 3 can directly apply heat to the battery cell during the rotation process, thereby achieving full utilization of energy and saving energy consumption. It can effectively avoid the problem of heat loss of the heating section 32 on the first conveying body 21 and the second conveying body 22, and at the same time, it also ensures the service life of the first conveying body 21 and the second conveying body 22.

[0040] Specifically, the first section 31, the heating section 32 and the second section 33 may all extend along the first direction. The second conveyor line 2 may be evenly spaced with heating lamps 3, that is, on a projection plane perpendicular to the first direction, the projections of the plurality of heating lamps 3 are evenly spaced along the outer contour of the projection of the entire second conveyor line 2, so as to improve the drying efficiency and drying quality of the battery cells and ensure the screen printing production efficiency of the heterojunction battery.

[0041] like Figure 2 As shown, in some embodiments, the length of the heating section 32 is not less than the length of the battery sheet in the first direction.

[0042] like Figure 2 As shown, in some embodiments, the arrangement area of ​​all the heating lamps 3 on the second conveyor line 2 is defined as the coverage area of ​​all the heating lamps 3, and on the projection plane in the vertical height direction, the projection area of ​​the coverage area of ​​all the heating lamps 3 is not less than the projection area of ​​the battery cell.

[0043] It can be understood that the above two structural design solutions can further ensure the coverage of the drying area of ​​the entire printed surface of the battery cell, so that the consistency of the grid line forming on the battery cell is better.

[0044] like Figure 2 and Figure 4 As shown, in some embodiments, a clamping structure 4 is provided between the heating lamp tube 3 and the second conveying line 2, and the clamping structure 4 includes a clamping member 41 and a clamping seat 42, one of the clamping member 41 and the clamping seat 42 is provided on the heating lamp tube 3, and the other is provided on the second conveying line 2.

[0045] It can be understood that the clamping structure 4 makes the heating lamp tube 3 and the second conveyor line 2 detachably connected, which improves the disassembly and assembly efficiency between the two and facilitates subsequent maintenance. At the same time, when one of the two is damaged, only the corresponding replacement is required to save costs and ensure the service life of both.

[0046] Taking the figure as an example, the clamp 41 can be fixed on the end of any one of the first section 31 and the second section 33 of the heating lamp tube 3 that is away from the heating section 32. Correspondingly, the clamping seat 42 can be fixed on the first conveying body 21 or the second conveying body 22 to ensure that the two can be snap-fitted together to achieve convenient disassembly and assembly of the heating lamp tube 3 on the second conveying line 2.

[0047] like Figure 4 As shown, in some embodiments, the holder 42 is provided with a clamping cavity 421, and the clamping member 41 includes a connected mounting portion 411 and an elastic portion 412, the mounting portion 411 is connected to any one of the heating lamp tube 3 and the second conveying line 2, the elastic portion 412 has a first critical state and a second critical state, and the elastic portion 412 is elastically deformed when switching from the first critical state to the second critical state so that the elastic portion 412 can slide along the clamping cavity 421, and the elastic portion 412 can rebound from the second critical state to the first critical state to press against the clamping cavity 421, that is, the elastic portion 412 is suitable for elastic deformation to cooperate with pressing against the inner wall surface of the clamping cavity 421.

[0048] It can be understood that by squeezing the elastic part 412, it is elastically deformed so that the elastic part 412 can slide along the clamping cavity 421 of the socket 42 until the end of the elastic part 412 away from the mounting part 411 abuts against the bottom wall of the clamping cavity 421, thereby completing the clamping of the clamp 41 in the socket 42. At this time, the elastic part 412 is clamped in the clamping cavity 421 under the action of the elastic restoring force.

[0049] Specifically, the clamping seat 42 may be composed of two corresponding U-shaped blocks, and the two U-shaped blocks define a clamping cavity 421. The elastic portion 412 may be composed of a first bending section and a second bending section correspondingly connected to both sides of the mounting portion 411, and the first bending section and the second bending section approach each other when the elastic portion 412 switches from the first critical state to the second critical state.

[0050] like Figure 2 and Figure 4As shown, in some embodiments, the mounting portion 411 is connected to the heating lamp 3 , and a heat dissipation hole 4111 is provided on the mounting portion 411 . There are multiple heat dissipation holes 4111 and they are arranged in an array on the mounting portion 411 to achieve heat dissipation between the mounting portion 411 and the heating lamp 3 .

[0051] Specifically, the outer contour of the heat dissipation hole 4111 can be one of a circle, a rectangle, a racetrack, and any closed curve.

[0052] like Figure 2 As shown, in some embodiments, the drying device also includes a casing 5, which is installed above the first conveyor line 1. On the projection plane in the vertical height direction, the outer contour of the projection of the second conveyor line 2 is located on the inner side of the outer contour of the projection of the casing 5, so that the second conveyor line 2 and the heating lamp tube 3 are covered on the first conveyor line 1 by the casing 5, thereby reducing the interference of the external environment on the drying process, reducing the heat loss of drying, and further improving the drying efficiency.

[0053] like Figure 3 As shown, in some embodiments, the first conveying body 21 and the second conveying body 22 both include a driving wheel 211 and a driven wheel 212, the driving wheel 211 and the driven wheel 212 are connected by a transmission belt, the driving wheel 211 of the first conveying body 21 and the driving wheel 211 of the second conveying body 22 are coaxially connected, that is, the two are sleeved on the same rotating shaft. The driven wheel 212 of the first conveying body 21 and the driven wheel 212 of the second conveying body 22 are coaxially connected, that is, the two are sleeved on the same rotating shaft.

[0054] The second conveying line 2 further includes a first motor 23 , which is drivingly connected to any one of the driving wheel 211 of the first conveying body 21 and the driving wheel 211 of the second conveying body 22 .

[0055] It can be understood that, by adopting the above structural design, the first motor 23 can drive the first conveying body 21 and the second conveying body 22 simultaneously, and the overall structure is simple.

[0056] Specifically, the transmission belt may not be limited to a high temperature resistant belt or a chain. In addition, taking the figure as an example, the card seat 42 in the clamping structure 4 may be fixed on the transmission belt.

[0057] like Figure 1 and Figure 2 As shown, in some embodiments, the second conveyor line 2 is located above the first conveyor line 1, and the drying device also includes a third conveyor line 6 and a flipping assembly 7. The third conveyor line 6, the flipping assembly 7 and the first conveyor line 1 are arranged in sequence along the conveying direction. The third conveyor line 6 is provided with a printer and is used to convey battery cells. The printer is suitable for printing grid lines on the battery cells. The flipping assembly 7 is used to flip the battery cells so that the wall surface of the battery cell with the grid lines printed thereon is flipped 180°.

[0058] It can be understood that the flipping assembly 7 can flip the wall surface of the battery cell with the gate lines printed on it to face the first conveyor line 1 (that is, the surface with the gate lines printed on it faces downward to enter the drying device). At this time, compared with the method in which the wall surface of the battery cell with the gate lines printed on it faces away from the first conveyor line 1 (that is, the surface with the gate lines printed on it faces upward to enter the drying device), the line shape of the gate lines of the battery cell is easy to collapse during drying, so that the aspect ratio of the gate lines is reduced. When the gate line silver paste in the present invention is dried by the heating lamp 3 on the second conveyor line 2 under the influence of gravity, it can form a gate line with a larger aspect ratio, thereby improving the conversion efficiency of the heterojunction battery.

[0059] like Figure 2 As shown, in some embodiments, the first conveyor line 1 includes a base 11 , a first rotating shaft 12 , a second rotating shaft 13 and a second motor 14 .

[0060] Among them, the first rotating shaft 12 and the second rotating shaft 13 are arranged at intervals on the base 11 along the conveying direction and are both pivotally connected to the base 11. The first rotating shaft 12 and the second rotating shaft 13 are connected through the first transmission belt 15. There are two first transmission belts 15 and they are arranged at intervals along the first direction. The battery cell is located on the top surface of the first transmission belt 15 and is suitable for contacting at least part of each first transmission belt 15, so that the wall surface of the battery cell printed with the grid line can be suspended on the first conveyor line 1, effectively avoiding the problem of the first conveyor belt easily damaging the grid line when it contacts the uncured grid line, so as to ensure the production quality of the heterojunction battery.

[0061] The second motor 14 is mounted on the base 11 and is transmission-connected to the first rotating shaft 12 .

[0062] Specifically, a first rotating wheel can be mounted on the first rotating shaft 12 , and a second rotating wheel can be mounted on the second rotating shaft 13 . The first rotating wheel and the second rotating wheel are connected to each other via a first transmission belt 15 to ensure smooth conveying operation of the first conveyor line 1 .

[0063] like Figure 1 As shown, in some embodiments, the flip assembly 7 includes a first flip body 71 , a second flip body 72 and a spacing adjustment mechanism 73 .

[0064] The first flip body 71 and the second flip body 72 are arranged at intervals along the first direction, and at least a portion of the battery cell can be in contact with each of the first flip body 71 and the second flip body 72 .

[0065] The spacing adjustment mechanism 73 is connected to the first flip body 71 and the second flip body 72 so as to adjust the spacing between the first flip body 71 and the second flip body 72 along the first direction.

[0066] It can be understood that the spacing adjustment mechanism 73 can adjust the spacing between the first flip body 71 and the second flip body 72, so that the flip assembly 7 can adapt to the flipping and receiving requirements of battery cells of different specifications. At the same time, because the printed area of ​​the battery cell can be suspended between the first flip body 71 and the second flip body 72, it is not in contact with the first flip body 71 and the second flip body 72, and is therefore not easily worn.

[0067] It should be noted that at least part of the edge of the cell (i.e., the portion where the grid lines are not printed) can be in contact with each of the first flip body 71 and the second flip body 72 to ensure that the first flip body 71 and the second flip body 72 receive the cell, so that the printed area of ​​the cell is suspended between the first flip body 71 and the second flip body 72. In addition, the spacing adjustment mechanism 73 is not limited to a spacing adjustment mechanism formed by the cooperation of a motor and a lead screw.

[0068] like Figure 1 As shown, in some embodiments, the first flip body 71 and the second flip body 72 each include a support seat 711 , a support shaft 712 , a third motor 713 and a plurality of flip blades 714 .

[0069] The support base 711 is connected to the spacing adjustment mechanism 73 , the support shaft 712 is pivotally connected to the support base 711 along a first direction, and the third motor 713 is mounted on the support base 711 and is transmission-connected to the support shaft 712 .

[0070] Among them, multiple flip leaves 714 are connected to the support shaft 712 and are arranged at equal intervals along the circumference of the support shaft 712. A receiving groove is jointly defined between any two adjacent flip leaves 714 and the outer peripheral wall of the support shaft 712, and at least part of the battery cell is suitable for being slidably connected to the receiving groove.

[0071] It can be understood that the third motor 713 can drive the multiple flipping blades 714 to rotate on the support seat 711 through the support shaft 712, so that the battery cells received from the third conveyor line 6 can be flipped 180 degrees when entering the first conveyor line 1, and the multiple flipping blades 714 also ensure the continuity of the entire flipping operation. At the same time, the accommodating groove can limit the battery cells along the thickness direction of the flipping blades 714 during the flipping process, ensuring the smooth implementation of the flipping operation.

[0072] It should be noted that the turning blades 714 of the first turning body 71 and the turning blades 714 of the second turning body 72 correspond to each other along the first direction (i.e., the left-right direction), and at the same time, the third motor 713 of the first turning body 71 and the third motor 713 of the second turning body 72 need to ensure synchronous rotation to ensure that both can well receive and turn over the battery cell. In addition, the battery cell can be limited to the turning blade 714 by adsorption (such as electromagnetic adsorption or negative pressure adsorption).

[0073] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0077] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A drying device for heterojunction solar cell production, characterized in that: include: A first conveying line, wherein the first conveying line is suitable for conveying battery cells along a conveying direction; as well as A second conveyor line and heating lamps, wherein the second conveyor line and the first conveyor line are arranged at intervals along the height direction and the extension directions of the two are consistent, a plurality of the heating lamps are arranged on the second conveyor line along its extension direction, the heating lamps are connected to the second conveyor line and extend along the first direction, the first direction, the height direction and the conveying direction are perpendicular to each other, and the second conveyor line is suitable for pulling the heating lamps to rotate along the conveying direction so as to dry the gate line silver paste on the battery cell.

2. The drying device for heterojunction solar cell production according to claim 1, characterized in that: The second conveying line includes a first conveying body and a second conveying body arranged at intervals along the first direction, and the first conveying body and the second conveying body rotate at the same speed; The heating lamp tube includes a first section, a heating section, and a second section which are connected in sequence, at least a portion of the first section is connected to the first conveying body, and at least a portion of the second section is connected to the second conveying body. On the projection plane perpendicular to the height direction, the projection of the heating section is completely located between the projection of the first conveying body and the projection of the second conveying body.

3. The drying device for heterojunction solar cell production according to claim 2, characterized in that: The length of the heating section is not less than the length of the battery cell in the first direction; And / or, define the arrangement area of ​​all the heating lamps on the second conveyor line as the coverage area of ​​all the heating lamps, and on the projection plane perpendicular to the height direction, the projection area of ​​the coverage area of ​​all the heating lamps is not less than the projection area of ​​the battery cell.

4. The drying device for heterojunction solar cell production according to claim 1, characterized in that: A clamping structure is provided between the heating lamp tube and the second conveying line. The clamping structure comprises a clamping member and a clamping seat. One of the clamping member and the clamping seat is provided on the heating lamp tube, and the other is provided on the second conveying line.

5. The drying device for producing heterojunction solar cells according to claim 4, characterized in that: The clamping seat is provided with a clamping cavity, and the clamping member includes a connected mounting portion and an elastic portion, the mounting portion is connected to any one of the heating lamp tube and the second conveying line, the elastic portion has a first critical state and a second critical state, and the elastic portion is elastically deformed when switching from the first critical state to the second critical state so that the elastic portion can slide along the clamping cavity, and the elastic portion can rebound from the second critical state to the first critical state to press against the clamping cavity.

6. The drying device for heterojunction solar cell production according to claim 5, characterized in that: The mounting portion is connected to the heating lamp tube, and a heat dissipation hole is arranged on the mounting portion. There are a plurality of heat dissipation holes arranged in an array on the mounting portion.

7. The drying device for producing heterojunction solar cells according to any one of claims 1 to 6, characterized in that: It also includes a casing, which is installed above the first conveyor line. On the projection plane perpendicular to the height direction, the outer contour of the projection of the second conveyor line is located inside the outer contour of the projection of the casing.

8. The drying device for heterojunction solar cell production according to claim 1, characterized in that: The second conveyor line is located above the first conveyor line, and the drying device also includes a third conveyor line and a flipping assembly. The third conveyor line, the flipping assembly and the first conveyor line are arranged in sequence along the conveying direction. The third conveyor line is provided with a printer and is used to convey the battery cells. The printer is suitable for printing grid lines on the battery cells. The flipping assembly is used to flip the battery cells so that the wall surface of the battery cell with the grid lines printed thereon is flipped 180°.

9. The drying device for producing heterojunction solar cells according to claim 8, characterized in that: The turning assembly comprises: a first flip body and a second flip body, wherein the first flip body and the second flip body are arranged at intervals along the first direction, and at least a portion of the battery sheet can contact each of the first flip body and the second flip body; and A spacing adjustment mechanism is connected to the first flip body and the second flip body so as to adjust the spacing between the first flip body and the second flip body along the first direction.

10. The drying device for producing heterojunction solar cells according to claim 9, characterized in that: The first flip body and the second flip body both include: A support base, a support shaft and a third motor, wherein the support base is connected to the spacing adjustment mechanism, the support shaft is pivotally connected to the support base along the first direction, and the third motor is mounted on the support base and is drivingly connected to the support shaft; and A plurality of flip leaves are connected to the support shaft and are arranged at equal intervals along the circumference of the support shaft, and a receiving groove is jointly defined between any two adjacent flip leaves and the outer peripheral wall of the support shaft, and at least a portion of the battery cell is suitable for being slidably connected to the receiving groove.

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