Welding bottom plate and welding equipment

Abstract

The embodiment of the invention provides a welding bottom plate and welding equipment, the welding bottom plate comprises a body, the body is provided with a top surface, the top surface is used for placing a welding strip, and the body is further provided with a through hole; the guide piece is installed in the through hole in a liftable mode, and the guide piece is provided with a first adsorption hole used for adsorbing the battery piece; the guide piece has a first state and a second state, and when the guide piece is in the first state, the guide piece is higher than the top surface, so that the guide piece can support the battery piece; when the guiding piece is in the second state, the guiding piece is lower than the top face so that the battery piece can be attached to the welding strip on the top face. The guiding piece in the first state can ensure the adsorption effect of the welding bottom plate on the battery piece in the transportation process, the risk that the battery piece slides in the transportation process is reduced, and the situation that poor welding occurs between the battery piece and the welding strip can be improved. The guiding piece in the second state can ensure that the battery piece and the welding strip are stably attached in the welding process, and the connecting effect of the battery piece and the welding strip is improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell production, and in particular to a welding base plate and welding equipment. Background Art

[0002] When welding the back-contact battery cell and the solder ribbon, a welding base plate is usually required to assist: first lay the solder ribbon on the welding base plate, then cover the back-contact battery cell on the surface of the solder ribbon, so that the back of the back-contact battery cell faces the solder ribbon, and then use a transportation device to transport the welding base plate, solder ribbon and battery cell to the welding position for welding.

[0003] The existing welding base plate is provided with adsorption holes for adsorbing the back contact cell. However, due to the presence of the welding ribbon, there is a gap between the welding base plate and the back contact cell. The adsorption force on the back contact cell is insufficient, and it is easy to slip relative to the welding ribbon during transportation, resulting in poor welding such as cold soldering and biased soldering in the photovoltaic module. Summary of the invention

[0004] In view of this, the present application provides a welding base plate and welding equipment to help solve the problem in the prior art that the welding defect rate is high due to the slippage of battery cells during transportation.

[0005] In a first aspect, an embodiment of the present application provides a welding base plate, comprising: a main body, having a top surface, the top surface is used to place a welding strip, and the main body is also provided with a through hole; a guide member, which can be lifted and lowered in the through hole, and the guide member is provided with a first adsorption hole for adsorbing a battery cell; the guide member has a first state and a second state, when the guide member is in the first state, the guide member is higher than the top surface, so that the guide member can support the battery cell; when the guide member is in the second state, the guide member is lower than the top surface, so that the battery cell can be attached to the welding strip on the top surface.

[0006] In a possible implementation, the guide member extends along the first direction, and the guide member is provided with a plurality of the first adsorption holes, and the plurality of the first adsorption holes are distributed at intervals along the first direction; and a distance L1 between two adjacent first adsorption holes is 8 mm to 150 mm.

[0007] In a possible implementation, the guide member extends along a first direction, and the guide member is provided with a plurality of the first adsorption holes, and the plurality of the first adsorption holes are spaced apart along the first direction; along the first direction, a distance L2 between the first adsorption holes located at the edge of the guide member and the edge of the main body is 15 mm to 70 mm.

[0008] In a possible implementation, the welding base plate includes a plurality of guide members, and the plurality of guide members are distributed on the body at intervals along the second direction.

[0009] In a possible implementation, an anti-slip layer is provided on a surface of the guide member facing the battery cell along a height direction of the guide member.

[0010] In a possible implementation, the guide member extends along a first direction, and the guide member is provided with a plurality of limiting grooves for accommodating the welding strip, and the plurality of limiting grooves are distributed at intervals along the first direction.

[0011] In a possible implementation, the body is further provided with a second adsorption hole for adsorbing the battery cell, and the second adsorption hole and the limiting groove are staggered in a second direction; the second direction is perpendicular to the first direction.

[0012] In a possible implementation manner, the diameter of the first adsorption hole is 1 mm to 5 mm; and / or the diameter of the second adsorption hole is 1 mm to 5 mm.

[0013] In a possible implementation, the welding base plate includes a plurality of first adsorption hole groups and a plurality of second adsorption hole groups, the first adsorption hole group includes a plurality of first adsorption holes spaced apart along the second direction, the second adsorption hole group includes a plurality of second adsorption holes spaced apart along the second direction; the plurality of first adsorption hole groups and the plurality of second adsorption hole groups are staggered in the first direction.

[0014] In a second aspect, an embodiment of the present application provides a welding device, including the welding base plate described above.

[0015] In the present application, when the guide is in the first state, the guide is higher than the top surface and can be used to support the battery cell placed on the welding base plate. At this time, the back of the battery cell can be fitted with the surface of the guide without a gap, so that the first adsorption hole can provide effective and stable adsorption force to the battery cell. When the guide is in the second state, the guide is lower than the top surface. At this time, the guide is no longer in direct contact with the battery cell, that is, the guide is no longer used to support the battery cell, so that the battery cell can be fitted with the welding strip on the top surface to ensure that the battery cell can be effectively welded with the welding strip. Specifically, in the process of transporting the welding base plate, the welding strip and the battery cell to the welding position together, the guide can be kept in the first state, which can ensure the adsorption effect of the welding base plate on the battery cell during transportation, improve the stability of the battery cell during transportation, and reduce the risk of slippage of the battery cell during transportation, which is conducive to improving the situation of poor welding such as biased welding and cold welding between the battery cell and the welding strip, and then it is conducive to improving the yield rate of photovoltaic modules. When the welding base plate, welding ribbon and battery cell have been transported to the welding position, the guide member can be switched from the first state to the second state. This can ensure that the battery cell and the welding ribbon maintain a stable fit during the welding process, thereby improving the welding effect between the battery cell and the welding ribbon, and further improving the yield rate and photoelectric conversion efficiency of the photovoltaic module.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of the welding base plate provided in the present application when the guide member is in the first state;

[0019] Figure 2 for Figure 1 A schematic structural diagram of the welding base plate when the guide member is in the second state;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure when the welding base plate and the welding strip cooperate;

[0021] Figure 4 for Figure 2 Magnified view of part A in FIG.

[0022] Reference numerals:

[0023] 10- first adsorption hole group;

[0024] 20- second adsorption hole group;

[0025] 1-Ontology;

[0026] 1a-top surface;

[0027] 11-through hole;

[0028] 12- second adsorption hole;

[0029] 121- second suction nozzle;

[0030] 2-Guide;

[0031] 21-first adsorption hole;

[0032] 211-first suction nozzle;

[0033] 22-limiting slot;

[0034] 3- Anti-slip layer;

[0035] 4- Soldering strip. DETAILED DESCRIPTION

[0036] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0037] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0039] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0040] The present application embodiment provides a welding base plate for use in the welding process of a battery cell, such as Figure 1As shown, the welding base plate includes a main body 1 and a guide member 2, the main body 1 has a top surface 1a for placing the welding strip 4, and the guide member 2 is provided with a first adsorption hole 21 for adsorbing the battery cell. The structure of the welding base plate is described in detail below, taking the battery cell as the back contact battery cell as an example. The main body 1 is also provided with a through hole 11, and the guide member 2 can be installed in the through hole 11 in a liftable manner along the thickness direction Z of the welding base plate, so that the guide member 2 can have a first state and a second state with different heights. Among them, the first state is a raised state. When the guide member 2 is in the first state, the guide member 2 is higher than the top surface 1a, and can be used to support the battery cell placed on the welding base plate. At this time, the back of the battery cell can be fitted with the surface of the guide member 2 without any gap, so that the first adsorption hole 21 can provide effective and stable adsorption force to the battery cell. The second state is a descending state, such as Figure 2 As shown, when the guide member 2 is in the second state, the guide member 2 is lower than the top surface 1a. At this time, the guide member 2 is no longer in direct contact with the battery cell, that is, the guide member 2 is no longer used to support the battery cell, so that the battery cell can fit with the welding strip 4 on the top surface 1a to ensure that the battery cell can be effectively welded to the welding strip 4.

[0041] Specifically, during the process of transporting the welding base plate, welding strip and battery cell to the welding position, the guide member 2 can be kept in the first state, which can ensure the adsorption effect of the welding base plate on the battery cell during transportation, improve the stability of the battery cell during transportation, and reduce the risk of the battery cell slipping during transportation, which is conducive to improving the situation of poor welding such as biased welding and cold welding between the battery cell and the welding strip, and thus is conducive to improving the yield rate of photovoltaic modules. When the welding base plate, welding strip and battery cell have been transported to the welding position, the guide member 2 can be switched from the first state to the second state, which can ensure that the battery cell and the welding strip 4 remain stably attached during the welding process, thereby improving the welding effect of the battery cell and the welding strip 4, and thus improving the yield rate and photoelectric conversion efficiency of the photovoltaic module.

[0042] In this embodiment, the guide member 2 can be lifted and lowered by an external lifting mechanism, thereby switching between the first state and the second state. The lifting mechanism can be a hydraulic lifting mechanism, a pneumatic lifting mechanism, a screw lifting mechanism, etc., and this embodiment does not limit this. The guide member 2 and the inner wall of the through hole 11 can be clearance-matched, that is, the guide member 2 may not contact the inner wall of the through hole 11 during the lifting process, and the guide member 2 is completely supported by the lifting mechanism; or, one of the guide member 2 and the inner wall of the through hole 11 can be provided with a guide rail, and the other can be provided with a slide groove that cooperates with the guide rail, that is, the guide member 2 and the through hole 11 can slide and cooperate with each other through the guide rail and the guide groove during the lifting process of the guide member 2, which is conducive to improving the stability of the guide member 2 during the lifting process.

[0043] In a specific embodiment, Figure 1As shown, the guide member 2 extends along the first direction X, and a plurality of limiting grooves 22 spaced apart along the first direction X are provided on the guide member 2, and each limiting groove 22 is used to accommodate a welding strip 4 respectively.

[0044] Specifically, the limiting groove 22 passes through the guide member 2 along the second direction Y. Figure 3 As shown, when the guide member 2 is in the first state, the welding strip 4 can be placed in the limiting groove 22. At this time, the two side walls of the limiting groove 22 along the first direction X are used to limit the movement of the welding strip 4 along the first direction X, that is, the limiting groove 22 can limit and guide the welding strip 4, thereby improving the stability of the welding strip 4 during transportation and reducing the risk of the welding strip 4 being offset, which is conducive to improving the situation of poor welding such as biased welding and cold welding between the battery cell and the welding strip 4, and further helps to improve the yield rate of the photovoltaic module. When the guide member 2 is in the second state, the limiting groove 22 drops to the inside of the through hole 11 and will not interfere with the welding process.

[0045] like Figure 1 As shown, the limiting groove 22 and the first adsorption hole 21 are mutually staggered in the second direction Y, that is, the first adsorption hole 21 is arranged to avoid the welding strip 4, and the welding strip 4 is used to weld with the main grid on the battery cell. When the battery cell is placed on the welding bottom plate, the main grid is aligned with the welding strip 4. Therefore, when the guide 2 is in the first state, the first adsorption hole 21 can avoid the main grid on the battery cell to avoid deformation or damage of the main grid caused by the adsorption force, so as to ensure the structural stability of the battery cell.

[0046] It should be noted that the first direction X and the second direction Y in this example are perpendicular to each other. The first direction X is perpendicular to the extension direction of the welding strip 4, and can be specifically the length direction of the welding base plate; the second direction Y is parallel to the extension direction of the welding strip 4, and can be specifically the width square of the welding base plate.

[0047] In a specific embodiment, Figure 1 As shown, a plurality of first adsorption holes 21 are provided on the guide member 2, and the plurality of first adsorption holes 21 are spaced apart along the first direction X. Specifically, the number of the first adsorption holes 21 is at least two, and at most two less than the number of the main grids on the battery cell. Along the first direction X, the distance L1 between two adjacent first adsorption holes 21 is 8 mm to 150 mm, and L1 can specifically be 8 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm or 150 mm, or other values ​​within the above range, which is not limited in this embodiment.

[0048] When L1 is too large (for example, greater than 150mm), it means that the number of first adsorption holes 21 is small, the adsorption effect of the guide member 2 on the battery cell is weakened, and the battery cell still has the risk of slipping during transportation; when L1 is too small (for example, less than 8mm), it means that the number of first adsorption holes 21 is large, which occupies too much space of the guide member 2, making it inconvenient to set the limit groove 22 on the guide member 2, and too many first adsorption holes 21 will lead to a decrease in the structural strength of the guide member 2, and the adsorption effect of the guide member 2 will no longer be significantly improved. Therefore, when the distance L1 between two adjacent first adsorption holes 21 is 8mm to 150mm, it can improve the adsorption effect of the guide member 2 on the battery cell, ensure that the guide member 2 has sufficient structural strength, and also make the guide member 2 have a suitable space to set the limit groove 22.

[0049] In a specific embodiment, along the first direction X, the distance L2 between the first adsorption hole 21 located at the edge of the guide member 2 and the edge of the main body 1 is 15mm~70mm, and L2 can specifically be 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm or 70mm, or other values ​​within the above range, which is not limited in this embodiment.

[0050] When L2 is too small (e.g., less than 15mm), the first adsorption hole 21 on the edge of the guide 2 is too close to the edge of the body 1, which will reduce the structural strength of the edge of the body 1 and easily cause damage or even breakage; when L2 is too large (e.g., greater than 70mm), the first adsorption hole 21 on the edge of the guide 2 is too far away from the edge of the body 1, which will cause the two ends of the battery cell along the first direction X to not receive sufficient adsorption force, affecting the stability of the battery cell during transportation. When L2 is 15mm to 70mm, along the first direction X, the distance between the first adsorption hole 21 on the edge of the guide 2 and the edge of the battery cell is 2.5mm to 10mm, which is conducive to improving the adsorption effect of the edge of the battery cell.

[0051] Therefore, when the distance L2 between the first adsorption hole 21 located on the edge of the guide member 2 and the edge of the main body 1 is 15mm~70mm, it can not only improve the adsorption effect of the guide member 2 on the battery cell, thereby improving the stability of the battery cell during transportation and effectively resisting the inertia during transmission, but also ensure the structural strength of the main body 1, thereby extending the service life of the welding base plate.

[0052] In a specific embodiment, Figure 1 As shown, the welding base plate includes a plurality of guide members 2, and the plurality of guide members 2 are spaced apart on the body 1 along the second direction Y. Specifically, the number of the guide members 2 may be 2, 3, 4 or more, which is not limited in this embodiment.

[0053] If only one guide member 2 is provided, it cannot provide a good support for the battery cell, and the battery cell is prone to shaking or even bending and deforming during transportation. Therefore, providing at least two guide members 2 along the second direction Y is conducive to improving the stability of the battery cell during transportation and reducing the loss of the battery cell during transportation. Moreover, when multiple guide members 2 are provided along the second direction Y, the limiting grooves 22 on the multiple guide members 2 that are aligned along the second direction Y and in the same column can be used to limit and guide the same welding strip 4, thereby further improving the stability of the welding strip 4 during transportation.

[0054] In a specific embodiment, the guide member 2 can also be composed of a plurality of sub-guide members arranged at intervals along the first direction X, the interval between two adjacent sub-guide members is used to form a limiting groove 22, the side walls of two adjacent sub-guide members are used to constitute the side walls of the limiting groove 22, and the first adsorption hole 21 is arranged on the sub-guide member.

[0055] In a specific embodiment, Figure 1 As shown, along the height direction Z of the guide member 2, an anti-skid layer 3 is provided on the surface of the guide member 2 facing the battery cell. The anti-skid layer 3 can increase the friction between the contact surface between the battery cell and the guide member 2, thereby preventing the battery cell from slipping relative to the guide member 2, which is beneficial to further improve the stability of the battery cell during transportation.

[0056] The anti-skid layer 3 should be made of a high temperature resistant material, specifically high temperature rubber, which can be used for a long time in a high temperature environment of 300°C to 400°C and has excellent anti-skid performance, so that the contact static friction coefficient between the anti-skid layer 3 and the battery cell satisfies 0.3 to 1. The surface of the anti-skid layer 3 may also be provided with an anti-skid pattern to further improve the anti-skid effect of the anti-skid layer 3.

[0057] In addition, the thickness D1 of the anti-skid layer 3 should satisfy: D1≤1mm, which can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, or other values ​​within the above range, which are not limited in this embodiment. If the anti-skid layer 3 is too thick, the anti-skid layer 3 may be higher than the top surface 1a when the guide member 2 is in the second state, thereby affecting the close contact between the battery cell and the welding strip 4. Therefore, when D1≤1mm, the bonding effect between the battery cell and the welding strip 4 can be improved when the guide member 2 is in the second state, and the waste of materials caused by the anti-skid layer 3 being too thick can be avoided.

[0058] In a specific embodiment, Figure 1As shown, the body 1 is further provided with a second adsorption hole 12 for adsorbing the battery cell, and the second adsorption hole 12 is also used for adsorbing the battery cell. When the guide member 2 is in the second state, there is a certain distance between the first adsorption hole 21 and the battery cell, and the second adsorption hole 12 is closer to the battery cell than the first adsorption hole 21, thereby improving the stability of the battery cell when the guide member 2 is in the second state (i.e., when the battery cell is in the welding state), so that the battery cell is stably attached to the surface of the welding strip 4, which is conducive to improving the welding effect between the battery cell and the welding strip 4.

[0059] Specifically, the second adsorption hole 12 and the limiting groove 22 are mutually staggered in the second direction Y, that is, the second adsorption hole 12 is arranged to avoid the welding strip 4, and the second adsorption hole 12 can avoid the main grid on the battery cell to avoid deformation or damage of the main grid caused by the adsorption force, so as to ensure the structural stability of the battery cell. In addition, the body 1 can be provided with a plurality of second adsorption holes 12 distributed at intervals in the first direction X, and / or the body 1 can be provided with a plurality of second adsorption holes 12 distributed at intervals in the second direction Y.

[0060] Specifically, the first adsorption hole 21 can be a through-hole structure, and the end of the first adsorption hole 21 away from the battery cell is connected to the exhaust device, and the exhaust device is used to suck the air in the first adsorption hole 21 to achieve the adsorption effect of the first adsorption hole. Similarly, the second adsorption hole 12 can also be a through-hole structure connected to the exhaust device, but the first adsorption hole 21 and the second adsorption hole 12 should be connected to different exhaust pipelines in the exhaust device, so that the first adsorption hole 21 and the second adsorption hole 12 can work independently of each other. Alternatively, the first adsorption hole 21 and the second adsorption hole 12 can also be connected to different exhaust devices, and can also work independently.

[0061] The first adsorption hole 21 and the second adsorption hole 12 can remain in the working state when the guide member 2 is in the first state and when the guide member 2 is in the second state, that is, they can simultaneously play an adsorption role on the battery cell to improve the stability of the battery cell. However, when the guide member 2 is in the first state, the first adsorption hole 21 is closer to the battery cell, and the adsorption effect of the first adsorption hole 21 is more obvious; when the guide member 2 is in the second state, the second adsorption hole 12 is closer to the battery cell, and the adsorption effect of the second adsorption hole 12 is more obvious.

[0062] In a specific embodiment, Figure 4 As shown, a first suction nozzle 211 can be provided in the first adsorption hole 21. The first suction nozzle 211 is used to connect to the exhaust device. The first suction nozzle 211 has a conical through hole penetrating along the thickness direction Z of the welding base plate. The end with a smaller aperture of the conical through hole faces the direction of the exhaust device, and the end with a larger aperture faces the direction of the battery cell. This can reduce the resistance of the airflow when passing through, making it easier to extract the gas, thereby improving the adsorption effect of the first adsorption hole 21.

[0063] Similarly, a second suction nozzle 121 can be provided in the second adsorption hole 12. The second suction nozzle 121 is used to connect to the vacuum device. The second suction nozzle 121 has a conical through hole penetrating along the thickness direction Z of the welding base plate. The end with a smaller aperture of the conical through hole faces the direction of the vacuum device, and the end with a larger aperture faces the direction of the battery cell, so as to enhance the adsorption effect of the second adsorption hole 12.

[0064] In a specific embodiment, the pore size of the first adsorption hole 21 is 1 mm to 5 mm; and / or, the pore size of the second adsorption hole 12 is 1 mm to 5 mm. Specifically, the pore size of the first adsorption hole 21 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, or other values ​​within the above range, which is not limited in this embodiment; the pore size of the second adsorption hole 12 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm or 5 mm, or other values ​​within the above range, which is not limited in this embodiment.

[0065] When the aperture of the first adsorption hole 21 is too small (for example, less than 1mm), the actual adsorption area for the battery cell is small, resulting in poor adsorption effect of the first adsorption hole 21; when the aperture of the first adsorption hole 21 is too large (for example, greater than 5mm), the space it occupies on the guide member 2 is too large, resulting in reduced structural strength of the guide member 2, and the adsorption effect of the guide member 2 will no longer be significantly improved. Therefore, when the aperture of the first adsorption hole 21 is 1mm to 5mm, it can improve the adsorption effect of the guide member 2 on the battery cell and ensure that the guide member 2 has sufficient structural strength.

[0066] Similarly, when the aperture of the second adsorption hole 12 is too small (for example, less than 1mm), the actual adsorption area for the battery cell is small, resulting in poor adsorption effect of the second adsorption hole 12; when the aperture of the second adsorption hole 12 is too large (for example, greater than 5mm), the space it occupies on the body 1 is too large, which will reduce the structural strength of the body 1, and the adsorption effect of the body 1 will no longer be significantly improved. Therefore, when the aperture of the second adsorption hole 12 is 1mm to 5mm, it can improve the adsorption effect of the body 1 on the battery cell and ensure that the body 1 has sufficient structural strength.

[0067] In a specific embodiment, the welding base plate includes a plurality of first adsorption hole groups 10 and a plurality of second adsorption hole groups 20, and the first adsorption hole group 10 includes a plurality of first adsorption holes 21 spaced apart along the second direction Y, that is, when the welding base plate includes a plurality of guide members 2 spaced apart along the second direction Y, a plurality of first adsorption holes 21 aligned along the second direction Y and in the same column on the plurality of guide members 2 are used to constitute the first adsorption hole group 10. The second adsorption hole group 20 includes a plurality of second adsorption holes 12 spaced apart along the second direction Y, that is, when the welding base plate includes a plurality of rows of second adsorption holes 12 spaced apart along the second direction Y, a plurality of second adsorption holes 12 aligned along the second direction Y and in the same column on the plurality of rows of second adsorption holes 12 are used to constitute the second adsorption hole group 20. Figure 1 As shown, a plurality of first adsorption hole groups 10 and a plurality of second adsorption hole groups 20 can be staggered in the first direction X, that is, the first adsorption holes 21 and the second adsorption holes 12 can be arranged in a cross or a tic-tac-toe cross structure. When the number of the first adsorption hole group 10 and the second adsorption hole group 20 is small, that is, the number of the first adsorption holes 21 and the second adsorption holes 12 is small, the arrangement according to the above arrangement can ensure that the first adsorption holes 21 and the second adsorption holes 12 are relatively evenly distributed on the welding base plate, thereby improving the uniformity of the adsorption of the welding base plate to the battery cell and ensuring the adsorption effect of the battery cell.

[0068] The embodiments of the present application also provide a welding device, which includes the welding base plate described in the above embodiments, and also includes a conveying device, a lifting mechanism, an exhaust device and a welding device. The conveying device includes a conveyor belt or other forms of conveying mechanisms, which are used to transport the placed welding base plate, welding ribbon 4 and battery cells to the bottom of the welding device; the welding device is used to weld and fix the battery cell to the welding ribbon 4; the lifting mechanism is used to control the guide member 2 to rise or fall relative to the body 1; the exhaust device is used to suck the air in the first adsorption hole 21 and the second adsorption hole 12 to realize the adsorption function of the welding base plate. The welding base plate has the above-mentioned technical effects, and the welding equipment including the welding base plate should also have the corresponding technical effects, which will not be repeated here.

[0069] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A welding base plate, characterized in that: include: A body (1) having a top surface (1a), wherein the top surface (1a) is used to place a welding strip (4), and the body (1) is also provided with a through hole (11); A guide member (2) is installed in the through hole (11) in a liftable manner, and the guide member (2) is provided with a first adsorption hole (21) for adsorbing the battery sheet; The guide member (2) has a first state and a second state. When the guide member (2) is in the first state, the guide member (2) is higher than the top surface (1a), so that the guide member (2) can support the battery cell; When the guide member (2) is in the second state, the guide member (2) is lower than the top surface (1a), so that the battery cell can be attached to the welding strip (4) on the top surface (1a).

2. The welding base plate according to claim 1, characterized in that: The guide member (2) extends along a first direction, and the guide member (2) is provided with a plurality of the first adsorption holes (21), and the plurality of the first adsorption holes (21) are distributed at intervals along the first direction; The distance L1 between two adjacent first adsorption holes (21) is 8 mm to 150 mm.

3. The welding base plate according to claim 1, characterized in that: The guide member (2) extends along a first direction, and the guide member (2) is provided with a plurality of the first adsorption holes (21), and the plurality of the first adsorption holes (21) are distributed at intervals along the first direction; Along the first direction, the distance L2 between the first adsorption hole (21) located at the edge of the guide member (2) and the edge of the main body (1) is 15 mm to 70 mm.

4. The welding base plate according to claim 1, characterized in that: The welding base plate comprises a plurality of guide members (2), and the plurality of guide members (2) are distributed at intervals along the second direction on the body (1).

5. The welding base plate according to claim 1, characterized in that: Along the height direction of the guide member (2), a non-slip layer (3) is provided on a surface of the guide member (2) facing the battery sheet.

6. The welding base plate according to claim 1, characterized in that: The guide member (2) extends along a first direction, and the guide member (2) is provided with a plurality of limiting grooves (22) for accommodating welding strips (4), and the plurality of limiting grooves (22) are distributed at intervals along the first direction.

7. The welding base plate according to claim 6, characterized in that: The body (1) is further provided with a second adsorption hole (12) for adsorbing the battery sheet, and the second adsorption hole (12) and the limiting groove (22) are arranged offset in a second direction; The second direction is perpendicular to the first direction.

8. The welding base plate according to claim 7, characterized in that: The aperture of the first adsorption hole (21) is 1 mm to 5 mm; And / or, the diameter of the second adsorption hole (12) is 1 mm to 5 mm.

9. The welding base plate according to claim 7, characterized in that: The welding base plate comprises a plurality of first adsorption hole groups (10) and a plurality of second adsorption hole groups (20), wherein the first adsorption hole group (10) comprises a plurality of first adsorption holes (21) spaced apart and distributed along the second direction, and the second adsorption hole group (20) comprises a plurality of second adsorption holes (12) spaced apart and distributed along the second direction; The plurality of first adsorption hole groups (10) and the plurality of second adsorption hole groups (20) are distributed alternately in the first direction.

10. A welding device, characterized in that: A welding base plate comprising any one of claims 1-9.

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