Bus bar folding device

Abstract

The utility model relates to the technical field of photovoltaic module production equipment, in particular to a bus bar folding device. The device comprises a base, and a supporting table, an overturning table and a heating mechanism which are arranged on the base, the supporting table is provided with a first supporting surface used for supporting the end part of a battery string group, and the overturning table is provided with a second supporting surface used for supporting a bus bar and a film belt on the bus bar; the overturning table is configured to rotate relative to the supporting table so that the bus bar and the film belt on the overturning table can be folded to the battery string set together. The heating mechanism is configured to be capable of heating the bus bar located on the overturning table so that the bus bar on the overturning table can be connected with the film belt. The device can automatically complete the film pasting procedure and the folding procedure of the bus bar, and the bus bar is prevented from being in direct contact with the battery string group after being overturned, so that the stability of a circuit is improved. In addition, the device does not directly heat the film belt, so that the problem that the film belt is damaged due to excessive heating is avoided.

Description

Technical Field

[0001] This application relates to the field of photovoltaic module manufacturing equipment, and in particular to a busbar folding device. Background Technology

[0002] In the solar cell manufacturing process, busbars need to be welded to the long solder strips at the ends of the cell string assembly. The cell string assembly is formed by arranging a certain number of cell strings according to the layout requirements of a photovoltaic module. Each cell string is formed by connecting a certain number of solar cells together via solder strips. For example... Figure 1 As shown, because the busbar 200 is located on the outside of the end battery cells of the battery string 100 after welding, the area of ​​the battery string 100 with the welded busbar 200 is relatively large. To address this issue, existing technology typically flips the busbar 200 at the end of the battery string 100 to the upper side of the battery string 100. Figure 2 This is a partial schematic diagram of the battery string 100 after the busbar 200 has been flipped to the upper side of the battery string 100.

[0003] In the photovoltaic module manufacturing process, there are two scenarios: those where an insulating film has been applied to the busbars beforehand and those where no insulating film has been applied beforehand. When an insulating film has been applied to the busbars, they will not directly contact the battery string after the busbar at the end of the battery string is flipped to the top of the battery string. However, when no insulating film has been applied to the busbars beforehand, they will directly contact the battery string after the busbar at the end of the battery string is flipped to the top of the battery string, thus affecting the stability of the circuit. Utility Model Content

[0004] The purpose of this application is to provide a busbar folding device to solve the technical problem in the prior art where, in the case where no insulating film is applied to the busbar beforehand, the busbar will directly contact the battery string after being folded onto it, thus affecting the stability of the circuit.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A busbar folding device is used to fold busbars welded on the extended welding strip at the end of a battery string. The device includes a base, a support platform, a flipping platform, and a heating mechanism mounted on the base.

[0007] The support platform has a first support surface for supporting the end of the battery string, and the flipping platform has a second support surface for supporting the busbar and the membrane strip on the busbar; the flipping platform is configured to rotate relative to the support platform to fold the busbar and the membrane strip on the flipping platform together onto the battery string.

[0008] The heating mechanism is configured to heat the busbars located on the flipping table so that the busbars on the flipping table are connected to the membrane belt.

[0009] The busbar folding device provided in this application can automatically complete the busbar application and folding processes, avoiding direct contact between the busbar and the battery pack after folding, thereby improving circuit stability. Furthermore, the device connects the busbar and the membrane strip by heating the busbar; that is, the device does not directly heat the membrane strip (the membrane strip has a lower melting point than the busbar), thus avoiding damage to the membrane strip due to overheating.

[0010] In some embodiments, the two extreme positions of the tilting table before and after rotating relative to the support table are the support position and the tilting position, respectively.

[0011] When the tilting table is in the supported position, the first support surface and the second support surface are coplanar, and the heating end of the heating mechanism can contact the tilting table or pass through the tilting table and contact the busbar on the tilting table.

[0012] When the flipping table is in the flipped position, the first support surface is opposite to the second support surface, and the busbar and membrane strip are folded together onto the battery string.

[0013] The heating mechanism heats the busbars in two ways: indirect heating and direct heating. For indirect heating, the heating element's heating head contacts the rotating platform, indirectly heating the busbar through the platform. This method offers the advantage of more uniform heating of the entire busbar. For direct heating, the heating element's heating head directly contacts the busbar. This method allows for rapid temperature increases in the contact area between the busbar and the heating element, and because the thermal conductivity of the rotating platform doesn't need to be considered, temperature control is more precise.

[0014] In some embodiments, the tilting table is provided with a through hole or blind groove for inserting the heating end of the heating mechanism, the through hole or blind groove extending from the side of the tilting table opposite to the second support surface to the second support surface.

[0015] The design of through holes or blind slots allows the heating end of the heating element to be closer to the busbar during the heating process, thereby improving the heat conduction effect.

[0016] In some embodiments, the heating mechanism includes at least one set of heating components, each set of heating components including a heating element, the heating element being mounted on the base with its heating end facing the second support surface;

[0017] Alternatively, the heating mechanism includes at least one set of heating components, each set of heating components including a heating element and a heating element driving source, wherein the heating element driving source is mounted on the base and its power output end is connected to the heating element in a transmission manner, and the heating element driving source is configured to drive the heating element to move in a direction away from or close to the second support surface.

[0018] The heating assembly includes a heating element mounted on the base. When the tilting table is tilted to the support position, the heating end of the heating element contacts or passes through the tilting table and contacts the busbar to heat the busbar. To prevent the heating element from interfering with the tilting table's tilting, the heating assembly may also include a heating element drive source connected between the base and the heating element. After heating is completed, before the tilting table tilts, the heating element drive source drives the heating element to move away from the second support surface to the initial position, so that the heating element does not interfere with the tilting table's tilting.

[0019] In some embodiments, the number of heating components is two or more groups, and each group of heating components is spaced apart along the length of the tilting table;

[0020] And / or, the heating element is a hot spot heating head or a heating plate, and the driving source for the heating element is one of a piston cylinder, an electric cylinder, or a motor.

[0021] Two or more sets of heating components can heat multiple locations along the length of the busbar, enabling multi-point connection between the busbar and the membrane belt, thus improving the strength of the connection. The heating element only needs to be able to generate heat to heat the busbar; it can be columnar, plate-shaped, block-shaped, or other irregularly shaped. The driving source for the heating element only needs to be able to drive the heating element to move in a direction away from or towards the second support surface; it can be one of a piston cylinder, electric cylinder, or motor.

[0022] In some embodiments, a first pad is provided on the first support surface, and the first pad is used to cushion the ends of the battery string;

[0023] And / or, a second pad is provided on the second support surface, the second pad being used to increase the friction between the tilting table and the busbar.

[0024] The first pad on the first support surface acts as a buffer when the busbar folds onto the battery string, preventing excessive collision force between the busbar and the battery string from causing the battery string to break. The second pad on the second support surface acts as a buffer when the busbar folds onto the battery string, and also increases the friction between the flipping table and the busbar, preventing the busbar from shifting relative to the second support surface of the flipping table.

[0025] In some embodiments, the tilting table includes a table body and a floating plate, wherein:

[0026] The platform body is rotatably connected to the support platform;

[0027] The floating plate is slidably mounted on the platform along the length of the tilting table, and the side of the floating plate away from the platform is the second support surface.

[0028] When the flipping platform is in the support position and the busbar is placed on the second support surface, the busbar is pressed to press it against the floating plate, and then pushed along the length of the flipping platform. At this time, since the floating plate is slidably set on the platform along the length of the flipping platform, the busbar and the floating plate slide synchronously relative to the platform along the length of the flipping platform. This results in the pressed busbar being misaligned relative to the end of the battery string in the length of the flipping platform. As a result, the excess solder strip where the busbar is located is also misaligned with the solder strip on the upper surface of the end battery cell. When the flipping platform flips the busbar to the upper side of the battery string, the excess solder strip will not stack on the solder strip on the upper surface of the end battery cell, thereby preventing short circuits when the battery string assembly is powered on and avoiding excessive stress at the solder strip stack during subsequent lamination of the battery string assembly, which could cause damage to the battery cell.

[0029] In some embodiments, the tilting table further includes a return spring disposed between the table body and the floating plate, with the two ends of the return spring connected to the table body and the floating plate respectively, and the return spring being able to stretch and deform in the length direction of the tilting table;

[0030] And / or, the flipping table also includes a guide assembly disposed between the table body and the floating plate, the guide assembly including a guide rail and a slider slidably disposed on the guide rail, wherein one of the guide rail and the slider is disposed on the table body and the other is disposed on the floating plate;

[0031] And / or, in the platform and the floating plate, one is provided with a mounting groove and the other is provided with a mounting protrusion, the mounting protrusion being inserted into the mounting groove and being able to move within the mounting groove along the length direction of the tilting platform.

[0032] The return spring is connected at both ends to the platform and the floating plate, respectively, and can extend and retract along the length of the tilting platform. Thus, when the busbar and the floating plate slide synchronously relative to the platform along the length of the tilting platform, the return spring is compressed and undergoes extension and retraction. When the busbar completes its misalignment, the pressure applied to it is released, the return spring depressurizes and rebounds, thereby pushing the floating plate to slide and reset along the length of the tilting platform. A guide assembly positioned between the platform and the floating plate restricts the movement trajectory of the floating plate relative to the platform, ensuring that the floating plate slides along the length of the tilting platform. Furthermore, one of the platform and the floating plate can have a mounting groove, and the other can have a mounting protrusion. The insertion and engagement of the mounting protrusion and the mounting groove further restricts the relative position of the platform and the floating plate.

[0033] In some embodiments, the busbar folding device further includes a membrane tape adsorption mechanism, which includes a pressure plate and a pressure plate drive assembly, wherein:

[0034] The pressure plate is provided with an adsorption channel, which is configured to draw air inward to adsorb the membrane belt and / or blow air outward to separate the pressure plate from the membrane belt.

[0035] When the tilting table is in the supported position, the pressure plate drive assembly is configured to drive the pressure plate to move in a direction close to or away from the second support surface, so as to place the film strip adsorbed on the pressure plate onto the busbar on the second support surface.

[0036] When the tilting table is in the support position and the manifold is placed on the tilting table, the adsorption channel in the pressure plate draws air inward to adsorb the membrane tape. The pressure plate drive assembly drives the pressure plate to move in a direction close to the second support surface to place the membrane tape adsorbed on the pressure plate onto the manifold. When the pressure plate leaves the membrane tape, the adsorption channel in the pressure plate blows air outward to separate the pressure plate from the membrane tape, so as to prevent the membrane tape from sticking to the pressure plate.

[0037] In some embodiments, the busbar folding device further includes a flipping drive mechanism mounted on the base, the power output end of the flipping drive mechanism being connected to the flipping table via a transmission, and the flipping drive mechanism being configured to drive the flipping table to rotate relative to the support platform.

[0038] And / or, the busbar folding device also includes a base drive mechanism, the power output end of which is connected to the base drive mechanism, and the base drive mechanism is configured to drive the base to move and / or rotate in space.

[0039] The flipping drive mechanism can drive the flipping table to rotate relative to the support platform, so that the flipping table is in the support position, and the busbar and membrane tape on the flipping table are folded together onto the battery string. The base drive mechanism can drive the base to move along a set trajectory, so that the first support surface of the support platform supports the bottom of the end of the battery string, and the second support surface of the flipping table supports the bottom of the busbar. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 A partial schematic diagram of the battery string assembly after the busbars have been welded.

[0042] Figure 2A partial schematic diagram showing the busbars on the battery string assembly being flipped to the top of the battery string assembly;

[0043] Figure 3 A three-dimensional schematic diagram of the busbar folding device provided in the embodiments of this application;

[0044] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0045] Figure 5 A schematic diagram showing the positional structure of the support platform, the tilting platform, and the heating mechanism provided in an embodiment of this application;

[0046] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0047] Figure 7 A schematic diagram showing the positions of the support platform, the tilting platform, and the heating element provided in the embodiments of this application when the tilting platform is in the support position;

[0048] Figure 8 A schematic diagram showing the positions of the support platform and the tilting platform provided in the embodiments of this application when the tilting platform is in the middle position between the support position and the tilting position;

[0049] Figure 9 This is a schematic diagram showing the positions of the support platform and the flipping platform provided in the embodiments of this application when the flipping platform is in the flipped position.

[0050] icon:

[0051] 1-Base;

[0052] 2-Support platform;

[0053] 3-Tilting table; 31-Through hole; 32-Table body; 321-Mounting groove; 33-Floating plate; 331-Mounting protrusion; 34-Guide assembly; 341-Guide rail; 342-Slider;

[0054] 4-Heating mechanism; 41-Heating assembly; 411-Heating element; 412-Heating element drive source;

[0055] 5-Second gasket;

[0056] 6-Tilting drive mechanism; 61-Rotating shaft; 62-First connecting rod; 63-Second connecting rod;

[0057] 7-Base drive mechanism; 71-X-axis drive assembly; 72-Y-axis drive assembly; 73-Z-axis drive assembly;

[0058] 8- Membrane belt adsorption mechanism; 81- Pressure plate;

[0059] 100-battery string pack;

[0060] 200-Busbar;

[0061] 300-membrane strip. Detailed Implementation

[0062] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0063] It should be noted that in the description of this application, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] It should be noted that, in the description of this application, the terms "connection" and "installation" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] As mentioned in the background section, if no insulating film is applied to the busbar beforehand, when the busbar at the end of the battery string is flipped to the top of the battery string, it will come into direct contact with the battery string, thus affecting the stability of the circuit.

[0066] To solve this problem, this application provides a busbar folding device, referring to... Figure 3 and Figure 4 The busbar folding device is used to fold the busbar 200 welded on the extended welding strip at the end of the battery string 100. It includes a base 1, a support platform 2, a flipping platform 3, and a heating mechanism 4 mounted on the base 1, wherein:

[0067] The support platform 2 has a first support surface for supporting the end of the battery string 100, and the flipping platform 3 has a second support surface for supporting the busbar 200 and the membrane strip 300 on the busbar 200; the flipping platform 3 is configured to rotate relative to the support platform 2 so that the busbar 200 and the membrane strip 300 on the flipping platform 3 are folded together onto the battery string 100.

[0068] The heating mechanism 4 is configured to heat the busbar 200 located on the flip table 3 so that the busbar 200 on the flip table 3 is connected to the membrane belt 300.

[0069] Reference Figures 7 to 9 The optional working process of the busbar folding device provided in this application is as follows:

[0070] First, move the base 1 or the battery string 100 so that the first support surface of the support platform 2 rests below the end of the battery string 100, and the second support surface of the flip platform 3 rests below the busbar 200.

[0071] Next, lay the membrane strip 300 flat on the busbar 200 (e.g., Figure 7 (as shown);

[0072] Subsequently, the heating mechanism 4 begins to heat the busbar 200 on the flipping table 3, so that the busbar 200 on the flipping table 3 is connected to the membrane belt 300;

[0073] After the busbar 200 and membrane tape 300 are connected and fixed on the flipping table 3, the flipping table 3 is controlled to rotate relative to the support table 2, so that the busbar 200 and membrane tape 300 are folded together onto the battery string 100 (e.g., Figure 8 and Figure 9 (As shown); After the busbar 200 is flipped, the membrane strip 300 is located between the battery string 100 and the busbar 200 (as shown). Figure 9 (As shown).

[0074] As described above, the busbar folding device provided in this application can automatically complete the film application and folding processes of the busbar 200, avoiding direct contact between the busbar 200 and the battery string 100 after folding, thereby improving circuit stability. Furthermore, conventional busbar film application equipment connects the busbar and the film strip by heating the film strip, while the busbar folding device provided in this application connects the busbar 200 and the film strip 300 by heating the busbar 200. That is, the device does not directly heat the film strip 300 (the melting point of the film strip 300 is lower than that of the busbar), thus avoiding the problem of damage to the film strip 300 due to overheating.

[0075] Continue to refer to Figure 3In some embodiments, the busbar folding device further includes a base drive mechanism 7, the power output end of which is connected to the base 1. The base drive mechanism 7 is configured to drive the base 1 to move and / or rotate in space. The base drive mechanism 7 can be configured to drive the base 1 to move relative to the entire device along one or more of the X-axis, Y-axis, and Z-axis directions, and can also be configured to drive the base 1 to rotate relative to the entire device. Generally, the X-axis, Y-axis, and Z-axis directions are orthogonal to each other, wherein the X-axis and Y-axis directions are parallel to the horizontal direction, and the Z-axis direction is perpendicular to the horizontal direction. By driving the base 1 along a set trajectory through the base drive mechanism 7, the first support surface of the support platform 2 is supported below the end of the battery string 100, and the second support surface of the flipping platform 3 is supported below the busbar 200.

[0076] In this embodiment, the base drive mechanism 7 includes an X-axis drive assembly 71, a Y-axis drive assembly 72, and a Z-axis drive assembly 73. The power output end of the X-axis drive assembly 71 is connected to the Y-axis drive assembly 72, and is configured to drive the Y-axis drive assembly 72 to move along the X-axis. The power output end of the Y-axis drive assembly 72 is connected to the Z-axis drive assembly 73, and is configured to drive the Z-axis drive assembly 73 to move along the Y-axis. The power output end of the Z-axis drive assembly 73 is connected to the base 1, and is configured to drive the base 1 to move along the Z-axis. The X-axis drive assembly 71, Y-axis drive assembly 72, and Z-axis drive assembly 73 can all be motor slide rail assemblies, and through their coordinated operation, the base 1 can be driven to move in any direction.

[0077] Continue to refer to Figure 4 In some embodiments, the busbar folding device further includes a flipping drive mechanism 6 mounted on the base 1. The power output end of the flipping drive mechanism 6 is connected to the flipping table 3 in a transmission manner. The flipping drive mechanism 6 is configured to drive the flipping table 3 to rotate relative to the support platform 2.

[0078] In some embodiments, the busbar folding device further includes a flipping drive mechanism 6 mounted on the base 1, the power output end of the flipping drive mechanism 6 being connected to the flipping table 3 in a transmission connection, and the flipping drive mechanism 6 being configured to drive the flipping table 3 to rotate relative to the support platform 2; the busbar folding device further includes a base drive mechanism 7, the power output end of the base drive mechanism 7 being connected to the base 1 in a transmission connection, and the base drive mechanism 7 being configured to drive the base 1 to move and / or rotate in space.

[0079] Specifically, the flipping drive mechanism 6 includes a rotating shaft 61 and a linkage assembly, wherein: the rotating shaft 61 is rotatably mounted on the base 1; one end of the linkage assembly is fixedly connected to the rotating shaft 61, and the other end of the linkage assembly is hinged to the flipping table 3; when the rotating shaft 61 rotates, it drives the flipping table 3 to rotate vertically relative to the support platform 2 via the linkage assembly.

[0080] To further improve the rotation stability of the tilting table 3 and prevent it from shifting or tilting during the rotation process, the linkage assembly is set to two sets. When the rotating shaft 61 rotates, the two sets of linkage assemblies drive the tilting table 3 from two different positions, so that the tilting table 3 rotates vertically relative to the support platform 2.

[0081] Optionally, the linkage assembly includes a first link 62 and a second link 63, wherein: one end of the first link 62 is fixedly connected to the rotating shaft 61, and the other end of the first link 62 is hinged to one end of the second link 63; the other end of the second link 63 is hinged to the tilting table 3. When the rotating shaft 61 rotates, it drives the first link 62 to rotate synchronously, and when the first link 62 rotates, it drives the second link 63 to push up or pull down the tilting table 3, thereby realizing the tilting drive of the tilting table 3.

[0082] Optionally, the rotating shaft 61 can be driven by either manual or automatic means. When driven manually, a control handle is fixed to the rotating shaft 61, allowing manual rotation of the rotating platform 3 by pushing or pulling the handle. When driven automatically, the rotation drive mechanism 6 further includes a shaft drive component mounted on the base 1. This component is configured to drive the rotating shaft 61 to rotate, thus automatically rotating the rotating platform 3. The shaft drive component can be a piston cylinder, an electric cylinder, or a motor, and its power output can be directly connected to the rotating shaft 61 or connected via a transmission structure such as a connecting rod, gear, or belt. In one specific embodiment, the rotating shaft 61 is fixed with a control handle, and the base 1 is equipped with a shaft drive component. This allows for easy switching between manual and automatic driving modes, making the device more flexible to operate.

[0083] Furthermore, the two extreme positions of the tilting table 3 before and after rotating relative to the support table 2 are the support position and the tilting position, respectively;

[0084] When the tilting table 3 is in the support position (i.e. Figure 7 (as shown in the figure), the first support surface and the second support surface are coplanar, and the heating end of the heating mechanism 4 can contact the flip table 3 or pass through the flip table 3 and contact the busbar 200 on the flip table 3.

[0085] When the tilting table 3 is in the tilting position (i.e.) Figure 9(As shown in the figure), the first support surface is opposite to the second support surface, and the busbar 200 and the membrane strip 300 are folded together onto the battery string 100.

[0086] In some embodiments, the heating end of the heating mechanism 4 can contact the tilting table 3 when the tilting table 3 is in the supported position, thereby indirectly heating the busbar 200 by heating the tilting table 3. The advantage of this indirect heating method of the busbar 200 is that the busbar 200 can be heated more evenly, which is suitable for situations where the membrane tape 300 is covered with hot melt adhesive; since the busbar 200 is heated evenly, it is beneficial for the hot melt adhesive on the membrane tape 300 to melt.

[0087] In other embodiments, the heating end of the heating mechanism 4 can pass through the tilting table 3 and contact the busbar 200 on the tilting table 3 when the tilting table 3 is in the supported position. The advantage of this direct heating of the busbar 200 is that it can quickly increase the temperature of the area where the busbar 200 contacts the heating end of the heating mechanism 4, and since the thermal conductivity of the tilting table 3 does not need to be considered, temperature control is more accurate. This direct heating of the busbar 200 can be applied in situations where there is no hot melt adhesive on the membrane tape 300. When heating the busbar 200, pressure can be applied to the side of the membrane tape 300 away from the busbar 200, so that the busbar 200 and the membrane tape 300 are fixed by hot pressing, improving the strength of the connection.

[0088] Reference Figure 5 In some embodiments, the heating mechanism 4 includes at least one set of heating components 41. The number of heating components 41 can be one, two, or more. The more heating components 41 there are, the more heating positions the heating mechanism 4 can have on the busbar 200, and the stronger the connection between the busbar 200 and the membrane belt 300.

[0089] The number of heating components 41 can be adaptively adjusted according to the length of the busbar 200. When there are two or more sets of heating components 41, each set of heating components 41 is distributed at intervals along the length direction of the flipping table 3. After the busbar 200 is placed on the second support surface of the flipping table 3, the length direction of the busbar 200 is parallel to the length direction of the flipping table 3. Thus, multiple sets of heating components 41 can heat multiple positions of the busbar 200 along its length direction, so that the busbar 200 and the membrane tape 300 are connected at multiple points, improving the firmness of the connection.

[0090] Continue to refer to Figure 5In some embodiments, each heating assembly 41 includes a heating element 411, which is mounted on the base 1 with its heating end facing the second support surface. When the tilting platform 3 is in the supported position, the heating element 411 is positioned below the tilting platform 3. At this time, the heating end of the heating element 411 contacts the bottom surface of the tilting platform 3. Alternatively, the bottom of the tilting platform 3 is provided with a blind hole, and the heating end of the heating element 411 is inserted into the blind hole and contacts the bottom surface of the blind hole. Or, the tilting platform 3 is provided with a through hole 31, and the heating end of the heating element 411 passes through the through hole 31 and contacts the busbar 200 on the tilting platform 3. In embodiments where the heating end of the heating element 411 is inserted into the blind hole or through hole 31, to avoid the heating element 411 interfering with the tilting of the tilting platform 3, the blind hole or through hole 31 should have sufficient space in the radial direction of the hole to allow the heating end of the heating element 411 to move out smoothly.

[0091] In other embodiments, each heating assembly 41 includes a heating element 411 and a heating element driving source 412. The heating element driving source 412 is mounted on the base 1 and its power output end is connected to the heating element 411. The heating element driving source 412 is configured to drive the heating element 411 to move in a direction away from or near the second support surface. During operation, initially, there is a gap between the heating element 411 and the flipping table 3. After the busbar 200 is placed on the second support surface and the membrane belt 300 is placed on the busbar 200, the heating element driving source 412 drives the heating element 411 to move in a direction close to the second support surface, so that the heating end of the heating element 411 contacts the flipping table 3 or the busbar 200 and heats the busbar 200. After heating is completed, before the flipping table 3 flips, the heating element driving source 412 drives the heating element 411 to move in a direction away from the second support surface to the initial position to prevent the heating element 411 from interfering with the flipping table 3.

[0092] Optionally, the heating element 411 is a hot-pressing head or a hot-pressing plate. The heating element 411 only needs to be able to generate heat to heat the busbar 200, and it can be columnar, plate-shaped, block-shaped or other irregular shapes.

[0093] Optionally, the heating element drive source 412 can be one of a piston cylinder, an electric cylinder, or a motor. Its power output end can be directly connected to the heating element 411, or it can be connected to the heating element 411 through a transmission structure such as a lead screw and nut or a gear and rack. This application does not make any specific limitations.

[0094] In this embodiment, the heating element 411 is a columnar heating head that can heat the busbar 200 by spot heating. This spot heating method can prevent the heating end of the heating element 411 from contacting areas outside the busbar 200. The heating element drive source 412 is a cylinder. The cylinder body of the heating element drive source 412 is fixed on the base 1, and the piston rod end of the heating element drive source 412 is fixed to the heating element 411.

[0095] Reference Figure 6 To allow the heating end of the heating element 411 to get closer to the busbar 200 during heating, the tilting table 3 is provided with a through hole 31 or a blind slot for the heating end of the heating mechanism 4 (specifically, the heating element 411) to be inserted. The through hole 31 or blind slot extends from the side of the tilting table 3 away from the second support surface to the second support surface. In this embodiment, the tilting table 3 is provided with a through hole 31, so that when the tilting table 3 is in the support position, the heating end of the heating element 411 can pass through the through hole 31 and directly contact the busbar 200, resulting in higher heating efficiency.

[0096] Reference Figure 5 In some embodiments, a first pad is provided on the first support surface to buffer the end of the battery string 100; and / or, a second pad 5 is provided on the second support surface to increase the friction between the flip table 3 and the busbar 200.

[0097] It should be noted that a gasket can be provided on either the first support surface or the second support surface. The gasket can be made of foamed silicone, rubber, or other elastic materials. The first gasket on the first support surface can act as a buffer when the busbar 200 is folded onto the battery string 100, preventing excessive collision force between the busbar 200 and the battery string 100 from causing the battery string 100 to break. The second gasket 5 on the second support surface can act as a buffer when the busbar 200 is folded onto the battery string 100, and can also increase the friction between the flipping table 3 and the busbar 200, preventing the busbar 200 from shifting relative to the second support surface of the flipping table 3.

[0098] Continue to refer to Figure 5 In some embodiments, the flipping table 3 includes a table body 32 and a floating plate 33, wherein: the table body 32 is rotatably connected to the support table 2, for example, the table body 32 is rotatably connected to the support table 2 by a hinge, or the table body 32 is rotatably connected to the base 1 by a hinge; the floating plate 33 is slidably disposed on the table body 32 along the length direction of the flipping table 3, and the side of the floating plate 33 away from the table body 32 is the second support surface.

[0099] When the flip platform 3 is in the support position and the busbar 200 is placed on the second support surface, the busbar 200 is pressed so that it is pressed against the floating plate 33, and the busbar 200 is pushed along the length direction of the flip platform 3. At this time, since the floating plate 33 is slidably disposed on the platform 32 along the length direction of the flip platform 3, the busbar 200 and the floating plate 33 slide synchronously relative to the platform 32 along the length direction of the flip platform 3, which ultimately causes the pressed busbar 200 to be misaligned relative to the end of the battery string 100 along the length direction of the flip platform 3.

[0100] Before the flipping table 3 flips the busbar 200, the busbar 200 is misaligned relative to the end of the battery string 100 along the length of the flipping table 3. As a result, the excess solder strip where the busbar 200 is located is also misaligned with the solder strip on the upper surface of the end battery cell. When the flipping table 3 flips the busbar 200 to the upper side of the battery string 100, the excess solder strip will not stack on the solder strip on the upper surface of the end battery cell, thereby preventing short circuit when the battery string assembly is powered on, and also avoiding excessive stress at the solder strip stack during subsequent lamination of the battery string assembly, which could cause damage to the battery cell.

[0101] The busbar 200 can be pressed manually or automatically. When the busbar 200 is pressed automatically, the busbar flipping device includes a pressing mechanism, which includes a pressing member and a pressing member drive assembly. When the flipping table 3 is in the support position, the pressing member drive assembly is configured to drive the pressing member to move in a direction close to or away from the second support surface, so that the busbar 200 is pressed between the pressing member and the floating table 31. The pressing member drive assembly is also configured to drive the pressing member to slide along the length direction of the flipping table 3, so that the pressing member and the floating table 31 are clamped and the busbar 200 is driven to slide along the length direction of the flipping table 3, so that the pressed busbar 200 is misaligned relative to the end of the battery string 100 in the length direction of the flipping table 3.

[0102] The pressing component drive assembly can be similar to the base drive mechanism 7, which will not be described in detail here; in addition, the pressing component drive assembly can also be a robot. The pressing component drive assembly only needs to satisfy the two conditions of driving the pressing component to move in the direction approaching or away from the second support surface, and driving the pressing component to move along the length direction of the flipping table 3, and its specific structure is not limited here.

[0103] Optionally, the tilting table 3 also includes a return spring disposed between the table body 32 and the floating plate 33. The two ends of the return spring are respectively connected to the table body 32 and the floating plate 33, and the return spring can extend and retract in the length direction of the tilting table 3.

[0104] Optionally, the flipping table 3 also includes a guide assembly 34 disposed between the table body 32 and the floating plate 33. The guide assembly 34 includes a guide rail 341 and a slider 342 slidably disposed on the guide rail 341. Of the guide rail 341 and the slider 342, one is disposed on the table body 32 and the other is disposed on the floating plate 33.

[0105] Optionally, the tilting table 3 also includes a return spring disposed between the table body 32 and the floating plate 33. The two ends of the return spring are respectively connected to the table body 32 and the floating plate 33. The return spring can extend and retract in the length direction of the tilting table 3. The tilting table 3 also includes a guide assembly 34 disposed between the table body 32 and the floating plate 33. The guide assembly 34 includes a guide rail 341 and a slider 342 slidably disposed on the guide rail 341. One of the guide rail 341 and the slider 342 is disposed on the table body 32, and the other is disposed on the floating plate 33.

[0106] Optionally, one of the platform 32 and the floating plate 33 is provided with a mounting groove 321, and the other is provided with a mounting protrusion 331. The mounting protrusion 331 is inserted into the mounting groove 321 and can move along the length direction of the tilting platform 3 within the mounting groove 321.

[0107] Optionally, the tilting table 3 also includes a return spring disposed between the table body 32 and the floating plate 33. The two ends of the return spring are respectively connected to the table body 32 and the floating plate 33. The return spring can extend and retract in the length direction of the tilting table 3. One of the table body 32 and the floating plate 33 is provided with a mounting groove 321, and the other is provided with a mounting protrusion 331. The mounting protrusion 331 is inserted into the mounting groove 321 and can move in the mounting groove 321 along the length direction of the tilting table 3.

[0108] Optionally, the tilting table 3 further includes a guide assembly 34 disposed between the table body 32 and the floating plate 33. The guide assembly 34 includes a guide rail 341 and a slider 342 slidably disposed on the guide rail 341. One of the guide rail 341 and the slider 342 is disposed on the table body 32, and the other is disposed on the floating plate 33. One of the table body 32 and the floating plate 33 is provided with a mounting groove 321, and the other is provided with a mounting protrusion 331. The mounting protrusion 331 is inserted into the mounting groove 321 and can move within the mounting groove 321 along the length direction of the tilting table 3.

[0109] Optionally, the tilting table 3 also includes a return spring disposed between the table body 32 and the floating plate 33. The two ends of the return spring are respectively connected to the table body 32 and the floating plate 33. The return spring can extend and retract in the length direction of the tilting table 3. The tilting table 3 also includes a guide assembly 34 disposed between the table body 32 and the floating plate 33. The guide assembly 34 includes a guide rail 341 and a slider 342 slidably disposed on the guide rail 341. One of the guide rail 341 and the slider 342 is disposed on the table body 32, and the other is disposed on the floating plate 33. One of the table body 32 and the floating plate 33 is provided with a mounting groove 321, and the other is provided with a mounting protrusion 331. The mounting protrusion 331 is inserted into the mounting groove 321 and can move within the mounting groove 321 along the length direction of the tilting table 3.

[0110] In the above structure, the two ends of the return spring are connected to the platform 32 and the floating plate 33 respectively, and it can extend and retract along the length of the tilting platform 3. Thus, when the busbar 200 and the floating plate 33 slide synchronously relative to the platform 32 along the length of the tilting platform 3, the return spring is compressed and undergoes extension and retraction. When the busbar 200 completes its misalignment, the pressure applied to the busbar 200 is released, the return spring loses pressure and rebounds, thereby pushing the floating plate 33 to slide and reset along the length of the tilting platform 3. That is, by setting the return spring, the automatic reset of the floating plate 33 is achieved. The guide assembly 34, located between the platform 32 and the floating plate 33, can limit the movement trajectory of the floating plate 33 relative to the platform 32, ensuring that the floating plate 33 slides along the length of the tilting platform 3. In addition, the platform 32 and the floating plate 33 may have a mounting groove 321 on one and a mounting protrusion 331 on the other. The relative position of the platform 32 and the floating plate 33 can be further restricted by the insertion and cooperation of the mounting protrusion 331 and the mounting groove 321.

[0111] In this embodiment, one, two, or more sets of guide components 34 are provided between the platform 32 and the floating plate 33. The guide component 34 includes a guide rail 341 and a slider 342 slidably disposed on the guide rail 341. The guide rail 341 is fixedly installed on the platform 32, and the slider 342 is fixedly installed on the floating plate 33. The platform 32 has mounting grooves 321 at both ends along its length direction, and the floating plate 33 has mounting protrusions 331 at both ends along its length direction. The mounting protrusions 331 are inserted into the mounting grooves 321 one by one and can move along the length direction of the flipping platform 3 within the mounting grooves 321.

[0112] Reference Figure 7 In some embodiments, the manifold folding device further includes a membrane tape adsorption mechanism 8, which includes a pressure plate 81 and a pressure plate driving assembly. The pressure plate 81 is provided with an adsorption channel, which is configured to draw air inward to adsorb the membrane tape 300 and / or blow air outward to separate the pressure plate 81 from the membrane tape 300. When the flipping table 3 is in the support position, the pressure plate driving assembly is configured to drive the pressure plate 81 to move in a direction close to or away from the second support surface to place the membrane tape 300 adsorbed on the pressure plate 81 onto the manifold 200 on the second support surface.

[0113] When the tilting table 3 is in the supported position and the manifold 200 is placed on the tilting table 3, the adsorption channel in the pressure plate 81 draws air inward to adsorb the membrane strip 300. The pressure plate driving assembly drives the pressure plate 81 to move in a direction close to the second support surface to place the membrane strip 300 adsorbed on the pressure plate 81 onto the manifold 200. When the pressure plate 81 leaves the membrane strip 300, the adsorption channel in the pressure plate 81 blows air outward to separate the pressure plate 81 from the membrane strip 300 to prevent the membrane strip 300 from sticking to the pressure plate 81.

[0114] The pressure plate drive assembly can be a structure similar to the base drive mechanism 7, which will not be described in detail here; in addition, the pressure plate drive assembly can also be a robot. The pressure plate drive assembly only needs to be able to drive the pressure plate 81 to move to the unloading position of the film belt 300 to adsorb the film belt 300, and move it to the second support surface to place the film belt 300 on the second support surface, and its specific structure is not limited here.

[0115] Based on the above structure, only one of the membrane belt adsorption mechanism 8 and the pressing mechanism needs to be provided. That is, in addition to adsorbing the membrane belt 300, the pressure plate 81 can also act as a pressing element to press the manifold 200 onto the floating platform 33. This arrangement can simplify the structure of the device and reduce the cost of the device.

[0116] Where the technical principles and objectives of this application are met, the embodiments of this application may be combined in any way, and the resulting technical solutions are also within the protection scope of this application.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A busbar folding device, characterized in that, The busbar folding device is used to fold the busbars welded on the extended welding strips at the ends of the battery string. The busbar folding device includes a base and a support platform, a flipping platform, and a heating mechanism mounted on the base, wherein: The support platform has a first support surface for supporting the end of the battery string, and the flipping platform has a second support surface for supporting the busbar and the membrane strip on the busbar; the flipping platform is configured to rotate relative to the support platform to fold the busbar and the membrane strip on the flipping platform together onto the battery string. The heating mechanism is configured to heat the busbar located on the flipping table so that the busbar on the flipping table and the membrane tape are connected.

2. The busbar folding device of claim 1, wherein The two extreme positions of the tilting table before and after rotating relative to the support table are the support position and the tilting position, respectively. When the tilting table is in the supported position, the first support surface and the second support surface are coplanar, and the heating end of the heating mechanism can contact the tilting table or pass through the tilting table and contact the busbar on the tilting table; When the flipping platform is in the flipped position, the first support surface is opposite to the second support surface, and the busbar and the membrane strip are folded together onto the battery string.

3. The busbar folding device of claim 2, wherein The flipping platform is provided with a through hole or blind groove for the heating end of the heating mechanism to be inserted. The through hole or blind groove extends from the side of the flipping platform away from the second support surface to the second support surface.

4. The busbar folding apparatus of claim 2, wherein The heating mechanism includes at least one set of heating components, each set of heating components includes a heating element, the heating element is mounted on the base and its heating end faces the second support surface; Alternatively, the heating mechanism may include at least one set of heating components, each set of heating components including a heating element and a heating element driving source, wherein the heating element driving source is mounted on the base and its power output end is connected to the heating element in a transmission manner, and the heating element driving source is configured to drive the heating element to move in a direction away from or close to the second support surface.

5. The busbar folding device of claim 4, wherein The number of heating components is two or more, and the heating components in each group are spaced apart along the length of the flipping table; And / or, the heating element is a hot water tap or a heating plate, and the driving source of the heating element is one of a piston cylinder, an electric cylinder, or a motor.

6. The busbar folding device of claim 1, wherein A first pad is provided on the first support surface, and the first pad is used to buffer the end of the battery string; And / or, a second pad is provided on the second support surface, the second pad being used to increase the friction between the tilting table and the busbar.

7. The busbar folding apparatus of claim 1, wherein The tilting table includes a table body and a floating plate, wherein: The platform body is rotatably connected to the support platform; The floating plate is slidably disposed on the platform along the length direction of the tilting table, and the side of the floating plate away from the platform is the second support surface.

8. The busbar folding device of claim 7, wherein The tilting table also includes a return spring disposed between the table body and the floating plate. The two ends of the return spring are respectively connected to the table body and the floating plate. The return spring can extend and retract in the length direction of the tilting table. And / or, the tilting table further includes a guide assembly disposed between the table body and the floating plate, the guide assembly including a guide rail and a slider slidably disposed on the guide rail, wherein one of the guide rail and the slider is disposed on the table body and the other is disposed on the floating plate; And / or, of the platform and the floating plate, one is provided with a mounting groove and the other is provided with a mounting protrusion, the mounting protrusion being inserted into the mounting groove and being able to move within the mounting groove along the length direction of the tilting platform.

9. The busbar folding apparatus of claim 2, wherein The busbar folding device further includes a membrane tape adsorption mechanism, which comprises a pressure plate and a pressure plate driving assembly, wherein: The pressure plate is provided with an adsorption channel, which is configured to draw air inward to adsorb the membrane strip and / or blow air outward to separate the pressure plate from the membrane strip. When the flipping table is in the supported position, the pressure plate drive assembly is configured to drive the pressure plate to move in a direction close to or away from the second support surface, so as to place the membrane tape adsorbed on the pressure plate onto the busbar on the second support surface.

10. The busbar folding apparatus according to any one of claims 1 to 9, wherein The busbar folding device also includes a flipping drive mechanism mounted on the base. The power output end of the flipping drive mechanism is connected to the flipping table in a transmission manner. The flipping drive mechanism is configured to drive the flipping table to rotate relative to the support platform. And / or, the busbar folding device further includes a base drive mechanism, the power output end of which is connected to the base drive mechanism in a transmission connection, and the base drive mechanism is configured to drive the base to move and / or rotate in space.

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