Welding positioning system and battery module welding system

Abstract

The utility model relates to the technical field of battery module welding, in particular to a welding positioning system and a battery module welding system. The welding positioning system comprises a bearing assembly used for bearing a to-be-welded workpiece; the transmission assembly is used for bearing the bearing assembly and unloading the bearing assembly; the supporting platform is used for loading the bearing assembly and loading the bearing assembly to the transmission assembly; when the welding positioning device is in a welding state, the supporting face of the supporting platform and the conveying face of the conveying assembly are equal in height, and the bearing assembly is jointly supported by the conveying assembly and the supporting platform. According to the welding positioning system and the battery module welding system, the situation that the position of the workpiece to be welded deviates due to factors such as gravity or vibration in the welding process can be avoided, the consistency of the position and quality of each welding point is ensured, and the welding efficiency and quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding positioning systems and battery module welding systems, in particular to a welding positioning system and a battery module welding system. Background Art

[0002] Batteries are energy storage devices widely used in various fields. With the development of lithium batteries and fast charging technology in recent years, they have not only promoted the application of electric vehicles, renewable energy and other fields, but also played an important role in consumer electronics, medical equipment and industrial automation. In the battery production process, welding is a key process to ensure battery performance and safety. Components such as tabs, pole pieces, battery modules and shells all need to go through the welding process to ensure good contact or firm connection.

[0003] During the processing and manufacturing of battery modules, it is necessary to weld the busbar. The existing setting requires that when the transmission mechanism transfers the battery module to the top of the top mechanism, the battery module is lifted to a certain height by the lifting mechanism before positioning and welding. Due to the differences in structure, size and center of gravity of battery modules of different specifications, the support platform of the lifting device cannot fix the position of the battery module. The position of the battery module on the lifting device may be different. After the battery module is lifted to the welding position, its welding surface may tilt, causing the welding point to be offset or difficult to locate, which in turn makes it difficult to smoothly carry out the automatic welding process, affecting the welding efficiency and quality. On the other hand, since the length of the battery module is often greater than the length of the support platform, when the lifting device lifts the battery module into place and the welding pressure head presses the battery module against the support platform, especially when the welding pressure head presses on one end of the battery module, the battery module is at risk of tipping over from the lifting device, which has a great impact on production safety and the overall efficiency of the production line.

[0004] However, the existing welding equipment has been installed and fixed, and the structure is not convenient to improve, so further solutions need to be sought. Utility Model Content

[0005] Based on this, it is necessary to provide a welding positioning system and a battery module welding system that can improve welding efficiency and quality in response to the above problems.

[0006] In a first aspect, a welding positioning system is provided, the welding positioning system comprising:

[0007] A bearing assembly, used for bearing the workpiece to be welded; a plurality of the first positioning members are arranged on a surface of the bearing assembly away from the workpiece to be welded, and first positioning blocks are respectively arranged at both ends of the bearing assembly along a first direction;

[0008] a transmission assembly, used for carrying the bearing assembly and unloading the bearing assembly; the transmission assembly comprises two conveyor belts arranged parallel to each other and spaced apart in a second direction and a conveyor belt guard plate arranged outside each of the conveyor belts, and the first positioning block is clamped on the conveyor belt guard plate; the second direction is perpendicular to the first direction; and

[0009] A support platform is used to load the bearing assembly and load the bearing assembly to the transmission assembly; the support platform is escalably disposed between the two conveyor belts; a second positioning member is disposed on the support platform corresponding to the first positioning member, and the second positioning member is engaged and connected with the first positioning member;

[0010] Wherein, when the welding positioning device is in a welding state, the support surface of the support platform is at the same height as the transmission surface of the transmission component, and the transmission component and the support platform jointly support the bearing component.

[0011] In some embodiments, a groove is formed on the surface of the first positioning block close to the conveyor belt guard plate, the conveyor belt guard plate is embedded in the groove, and the groove width of the groove is greater than the thickness of the conveyor belt guard plate.

[0012] In some embodiments, the first positioning member is a first cylindrical groove, the second positioning member is a first convex column, the groove depth of the first cylindrical groove is 1 cm-3 cm, and the height of the first convex column is 1 cm-3 cm.

[0013] In some embodiments, a second cylindrical groove is arranged around the first cylindrical groove, and the shape of the second cylindrical groove is the same as or different from that of the first cylindrical groove; a second convex column is arranged around the first convex column corresponding to the second cylindrical groove, and the shape of the second convex column matches that of the second cylindrical groove; and the second cylindrical groove is snap-connected with the second convex column.

[0014] In some embodiments, at least some of the first positioning members are electromagnetic suction members, and the second positioning member is engaged with the first positioning member and is magnetically connected to the first positioning member.

[0015] In some embodiments, the electromagnetic suction components are symmetrically arranged relative to the geometric center of the support platform; or the electromagnetic suction components are arranged at both ends of the support platform along the first direction.

[0016] In some embodiments, rollers are respectively provided at both ends of the bearing assembly, and when the transmission assembly is used to transmit the bearing assembly, the rollers are rollingly connected to the inner side of the conveyor belt guard plate.

[0017] In some embodiments, the welding positioning system further includes a first limiting component, which is disposed on a side of the support platform close to the upstream of the transmission component and is used to limit the displacement of the bearing component along the second direction.

[0018] In some embodiments, a second limiting component is provided downstream of the transmission component, and the second limiting component is located on at least one side of the transmission path of the bearing component to limit the displacement of the bearing component along the first direction.

[0019] The utility model also provides a battery module welding system, which includes the above-mentioned welding positioning system and a welding pressure head. When the workpiece to be welded is welded, the welding pressure head presses the workpiece to be welded on the supporting component, and the transmission component and the supporting platform can support the supporting component.

[0020] The above-mentioned welding positioning system and battery module welding system are suitable for welding battery modules and busbars of various specifications. The bearing assembly is supported by the support platform and loaded onto the transmission assembly, and the bearing assembly is supported together with the transmission assembly, and welding is completed under the joint support of the transmission assembly and the support platform. Since the first positioning member of the bearing assembly and the second positioning member of the support platform can be engaged and fixed with each other, the bearing assembly can be loaded, positioned and fixed at one time, and the first positioning block of the bearing assembly and the conveyor belt guard of the transmission assembly are engaged with each other, so that the two ends of the bearing assembly can be prevented from moving downward under pressure due to the compression of the welding pressure head during welding, so as to ensure that the positions of the parts to be welded in the horizontal and vertical directions can be accurately positioned during welding, so as to achieve precise welding. The present application solves the problem that the positions of the existing parts to be welded are difficult to fix and the welding points of the welding device are offset by changing the loading and unloading methods and the welding positioning positions without changing the overall structure of the existing welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are 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 creative work.

[0022] Figure 1 A structural schematic diagram of a welding positioning system provided in one embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the structure of a support platform of a welding positioning system provided in one embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the structure of a bearing assembly provided in one embodiment of the utility model;

[0025] Figure 4 for Figure 1 A magnified schematic diagram of the circled part;

[0026] Figure 5 for Figure 2 An enlarged schematic diagram of the circled portion A;

[0027] Figure 6 A schematic diagram of the reverse structure of a bearing assembly provided in one embodiment of the utility model;

[0028] Figure 7 for Figure 2 An enlarged schematic diagram of the circled portion B;

[0029] Figure 8 for Figure 2 An enlarged schematic diagram of the circled portion C.

[0030] In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the attached symbols are explained as follows:

[0031] 100: welding positioning system;

[0032] 101: welding workbench;

[0033] 111: conveyor belt, 112: conveyor belt guard;

[0034] 121: bearing assembly, 125: roller;

[0035] 122: clamping member, 1221: fixed clamping member, 1222: movable clamping member;

[0036] 123: first positioning block, 1231: groove;

[0037] 124: first positioning member, 1241: first cylindrical groove, 1242: second cylindrical groove;

[0038] 131: Lifting mechanism;

[0039] 132: support platform; 1321: anti-sucking hole;

[0040] 133: second positioning member, 1331: first protruding column, 1332: second protruding column;

[0041] 140: first limit assembly; 141: first driving member; 142: first floating wheel;

[0042] 150: second limit assembly, 151: second driving member; 152: second floating wheel;

[0043] 300, battery module. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0050] In the current manufacturing process of battery modules, the module line Busbar welding needs to lift the module to a certain position before welding can be carried out. Since the welding system usually needs to weld multiple products of different specifications, the position of some modules during welding may not be the center position of the lifting mechanism, resulting in the entire module being tilted when the module is lifted to the specified height, which in turn causes the welding focus to shift and the Busbar on the module to be unable to be positioned, resulting in poor welding, and ultimately the automatic Busbar welding cannot be used; at the same time, when the welding pressure head is pressed on one end of the battery module, the battery module is at risk of tipping over from the lifting device, affecting production safety and the overall efficiency of the production line.

[0051] In view of the above problems, the utility model provides a welding positioning system that can be better applied to the automatic Busbar welding system. Figures 1 to 6 A welding positioning system 100 provided in one embodiment of the utility model includes a welding workbench 101, a bearing assembly 121, a transmission assembly and a lifting assembly, wherein the transmission assembly is arranged on the welding workbench 101, the lifting assembly includes a lifting mechanism 131 and a supporting platform 132, and the supporting platform 132 can be lifted up and down relative to the table surface of the welding workbench 101 under the action of the lifting mechanism 131. The bearing assembly 121 is used to carry the workpiece to be welded, and is also used to cooperate with the transmission assembly and the supporting platform 132 to position the workpiece to be welded on the welding station to complete the precise positioning of the workpiece to be welded, and finally the bearing assembly 121 is unloaded from the supporting platform 132 by the transmission assembly.

[0052] In some embodiments, a plurality of first positioning members 124 are disposed on a surface of the bearing assembly 121 away from the workpiece to be welded, and first positioning blocks 123 are respectively disposed at both ends of the bearing assembly 121 along the first direction.

[0053] In some embodiments, the transmission component is used to carry the bearing component 121 and unload the bearing component 121 from the self-supporting platform 132 after welding is completed to enter the downstream station; the transmission component includes two conveyor belts 111 arranged parallel to each other and spaced apart in the second direction and conveyor belt guards 112 arranged on both sides of the conveyor belts, and the first positioning block 123 is clamped on the conveyor belt guard 112. Figure 1 and Figure 4 ; wherein the second direction is perpendicular to the first direction, such as Figure 1 As shown, the extension and conveying direction of the conveyor belt 111 is the second direction.

[0054] In some embodiments, the support platform 132 is used to unload the load-bearing component 121 from the upstream conveying mechanism and load the load-bearing component 121 onto the transmission component; in some specific embodiments, the load-bearing component 121 of the upstream workstation can be loaded onto the support platform 132 by a robot.

[0055] The support platform 132 is escalably disposed between the two conveyor belts 111. In some specific embodiments, the lifting mechanism 131 is disposed below the tabletop of the welding workbench 101. Figure 2 As shown, the output end of the jacking mechanism 131 is driven to connect to the supporting platform 132. Under the drive of the jacking mechanism 131, the supporting platform 132 can be lifted up and down; more specifically, the jacking mechanism 131 can include a cylinder to provide drive for the lifting and lowering of the supporting platform 132.

[0056] A second positioning member 133 is provided on the supporting platform 132 corresponding to the first positioning member 124. Figure 2 As shown, the second positioning member 133 is engaged with the first positioning member 124 , so that the supporting assembly 121 is positioned on the supporting platform 132 while the supporting platform 132 unloads the supporting assembly 121 from the upstream conveying mechanism.

[0057] When the bearing assembly 121 arrives at the welding station, the supporting platform 132 rises to a preset position above the welding workbench 101 under the action of the lifting mechanism 131, and the upstream transmission mechanism such as a manipulator places the bearing assembly 121 and the parts to be welded thereon (such as the battery module 300) on the supporting platform 132, and the second positioning member 133 is engaged with the first positioning member 124 to position the bearing assembly 121 on the supporting platform 132; then the supporting platform 132 moves the bearing assembly 121 downward until the supporting surface of the supporting platform 132 is at the same height as the transmission surface of the transmission assembly, and at this time, the first positioning block 123 and the first positioning block 124 are engaged with each other. The conveyor belt guard plate 112 is engaged, so that the bearing assembly 121 is supported by the support platform 132, the conveyor belt 111 and the conveyor belt guard plate 112 at the same time. Under the joint action of the engagement of the first positioning member 124 and the second positioning member 133 and the engagement of the first positioning block 123 and the conveyor belt guard plate 112, the bearing assembly 121 forms a precise and stable positioning structure with the transmission assembly and the support platform 132. When the welding positioning device is in the welding state, the transmission assembly and the support platform 132 jointly support the bearing assembly 121, so that the welded parts on the bearing assembly 121 are accurately positioned and stably welded. After the welding is completed, the support platform 132 is driven by the lifting mechanism 131 to drop below the table of the welding workbench 101, and the conveyor belt 111 transports the bearing assembly 121 to the next station.

[0058] The present application no longer follows the welding method of the existing production line in which the load-bearing component 121 is loaded through the conveyor belt 111 of the transmission component and then the load-bearing component 121 on the conveyor belt 111 is placed on the support platform 132 for lifting. Instead, the load-bearing component 121 and the parts to be welded thereon are loaded through the support platform 132. While loading, the load-bearing component 121 and the support platform 132 are positioned. Then the support platform 132 descends to the same height as the support surface and the transmission surface of the transmission component. The load-bearing component 121 and the conveyor belt guard plate 112 of the transmission component are positioned. The parts to be welded are jointly supported and positioned by the load-bearing component 121, the support platform 132 and the transmission component. The parts to be welded are no longer lifted and positioned, which avoids the displacement of the position of the parts to be welded during the lifting process, and also avoids the possible tipping problem of the parts to be welded caused by crimping.

[0059] The welding positioning system 100 of the present application is suitable for welding battery modules and busbars of various specifications. The support platform 132 receives the bearing assembly 121 and loads the bearing assembly 121 onto the transmission assembly, and supports the bearing assembly 121 together with the transmission assembly, and completes the welding under the joint support of the transmission assembly and the support platform 132. Since the first positioning member 124 of the bearing assembly 121 and the second positioning member 133 of the support platform 132 can be mutually engaged and fixed, the bearing assembly 121 can be loaded, positioned and fixed at one time, and the first positioning block 123 of the bearing assembly 121 and the conveyor belt guard plate 112 of the transmission assembly are engaged, the positions of the two ends of the bearing assembly 121 can be prevented from moving downward under pressure due to the compression of the welding pressure head during welding, so as to ensure that the positions of the parts to be welded in the horizontal and vertical directions can be accurately positioned during welding, so as to achieve precise welding. The present application solves the problem that the positions of the existing parts to be welded are difficult to fix and the welding points of the welding device are offset by changing the loading and unloading method, welding positioning position and welding positioning method without changing the overall structure of the existing welding device.

[0060] In some embodiments, the supporting component 121 is used to support the workpiece to be welded during the transmission process and the welding process, and can be as follows: Figure 3 In the plate-like structure shown, the workpiece to be welded is placed or fixed on the supporting component 121. The size of the supporting component 121 in the first direction is not less than the distance between the two conveyor belts 111. The size of the supporting component 121 in the second direction can be set according to actual needs to accommodate workpieces of different sizes to be welded.

[0061] In the present application, the transmission component is used to support the bearing component 121 together with the support platform 132 when the support platform 132 is lowered to the same height as the transmission surface of the transmission component, and the bearing component 121 is unloaded and transmitted to the downstream station after welding is completed. Taking the welding of the battery module as an example, during welding, the busbar needs to be pressed against the battery module to prevent the position displacement or relative position displacement of the busbar and the battery module itself during welding, and the pressing force may cause the support surface of the conveyor belt 111 of the transmission component to move down slightly, resulting in the displacement of the welding point. Through the snap connection between the first positioning block 123 and the conveyor belt guard plate 112, the conveyor belt guard plate 112 provides support for the bearing component 121, which can prevent the bearing component 121 from moving down with the conveyor belt 111, thereby avoiding the displacement of the welding point. In the present application, since the bearing component 121 is mainly supported by the support platform 132, and the conveyor belt 111 and the conveyor belt guard plate 112 provide auxiliary support, there will be no structural damage to the conveyor belt 111 and the conveyor belt guard plate 112.

[0062] In one embodiment, if Figure 1 to Figure 2As shown, the transmission component is arranged on the welding workbench 101, and the welding station is located on the welding workbench 101. More specifically, the transmission component, the support platform 132 and the bearing component 121 jointly form a positioning structure and a welding station for the workpiece to be welded, that is, when the support platform 132 loads the bearing component 121 and moves the bearing component 121 down to the same height as the transmission surface of the transmission component, the conveyor belt 111, the conveyor belt guard plate 112 and the support platform 132 of the transmission component jointly support the bearing component 121, so that the workpiece to be welded is jointly supported and accurately positioned by the bearing component 121, the transmission component and the support platform 132, so that the workpiece to be welded completes the welding process at the welding station.

[0063] The above-mentioned welding positioning system 100 can ensure the stable and accurate positioning of the workpiece to be welded during the welding process through the mutual cooperation of the supporting component 121, the transmission component and the supporting platform 132. It is no longer necessary to use a lifting mechanism to lift the supporting component to a certain height for positioning and welding, thereby avoiding the tilting and sliding of the supporting component during the lifting process and improving the welding stability; especially when there are multiple welding points on one side of the workpiece, the multiple welding points can be located on the same horizontal plane, ensuring the consistency of the position and quality of each welding point, thereby improving the welding efficiency and quality.

[0064] In one embodiment, please combine Figure 1 , 3 , 4 and Figure 6 A groove 1231 is formed on the surface of the first positioning block 123 close to the conveyor belt guard plate 112 , the conveyor belt guard plate 112 is embedded in the groove 1231 , and the groove width of the groove 1231 is greater than the thickness of the conveyor belt guard plate 112 .

[0065] In the present application, a groove 1231 is provided on the first positioning block 123 to engage with the conveyor belt guard plate 112. On the one hand, the conveyor belt guard plate 112 can support the bearing component 121 when the workpiece to be welded is pressed, and when the workpiece to be welded is not pressed, the groove 1231 will not abut against the conveyor belt guard plate 112, thereby avoiding interference between the bearing component 121 and the conveyor belt guard plate 112 during transmission; at the same time, the groove width of the groove 1231 is greater than the thickness of the conveyor belt guard plate 112. On the one hand, it is convenient for the groove 1231 of the first positioning member 124 to engage smoothly with the conveyor belt guard plate 112 when the support platform 132 descends, and on the other hand, when the bearing component 121 is transmitted to the downstream by the conveyor belt 111, the inner wall of the groove 1231 does not interfere with the conveyor belt guard plate 112.

[0066] In some exemplary embodiments, a first positioning block 123 is respectively disposed at both ends of the bearing assembly 121 along the first direction, that is, two first positioning blocks 123 are disposed on the bearing assembly 121. Figure 3 or Figure 6As shown, two first positioning blocks 123 are respectively provided at both ends. The position and quantity of the first positioning blocks 123 on the bearing assembly 121 are adjustable. Specifically, the two first positioning blocks 123 can be symmetrically arranged relative to the bearing assembly 121, or can be asymmetrically arranged, which is not limited here, so long as they can be engaged and abutted with the conveyor belt guard 112.

[0067] In one embodiment, the first positioning member 124 is a first cylindrical groove 1241, and the second positioning member 133 is a first protruding column 1331. Figure 5 and Figure 6 As shown, the groove depth of the first cylindrical groove 1241 is 1cm-3cm, and the height of the first convex column 1331 is 1cm-3cm. In the present application, the first positioning member 124 and the second positioning member 133 are connected by a snap-fitting manner in which the first convex column 1331 is inserted into the first cylindrical groove 1241, and the groove depth of the first cylindrical groove 1241 is 1cm-3cm, and the height of the first convex column 1331 is 1cm-3cm. Even if the center of the workpiece to be welded on the bearing assembly 121 is offset, due to the snap-fitting connection between the first positioning member 124 and the second positioning member 133, the bearing assembly 121 can be directly positioned on the supporting platform 132, and the position will not be offset during the descent of the supporting platform 132, and will not affect the welding.

[0068] In one embodiment, if Figure 5 and Figure 6 As shown, the periphery of the first cylindrical groove 1241 is provided with a second cylindrical groove 1242, and the shape of the second cylindrical groove 1242 is the same as or different from the shape of the first cylindrical groove 1241. In this embodiment, the shape of the second cylindrical groove 1242 is the same as the shape of the first cylindrical groove 1241, that is, the shapes of the first cylindrical groove 1241 and the second cylindrical groove 1242 are both shown as cylindrical, but not limited to this. The shape of the second cylindrical groove 1242 may be different from the shape of the first cylindrical groove 1241. The shapes of the first cylindrical groove 1241 and the second cylindrical groove 1242 may be selected from any one of a triangular prism, a rectangular prism or other polygonal bodies or a combination thereof. Correspondingly, the periphery of the first convex column 1331 is provided with a second convex column 1332 corresponding to the second cylindrical groove 1242, and the shape of the second convex column 1332 matches the shape of the second cylindrical groove 1242, so as to realize the snap connection between the second cylindrical groove 1242 and the second convex column 1332.

[0069] In one embodiment, the groove depth of the second cylindrical groove 1242 can be the same as or different from the groove depth of the first cylindrical groove 1241; the height of the second convex column 1332 can be the same as or different from the height of the first convex column 1331. Preferably, the groove depth of the second cylindrical groove 1242 is smaller than the groove depth of the first cylindrical groove 1241, and the height of the second convex column 1332 is smaller than the height of the first convex column 1331.

[0070] In the present application, by setting the second cylindrical groove 1242 around the first cylindrical groove 1241, setting the second boss 1332 around the first boss 1331, and connecting the second boss 1332 to the second cylindrical groove 1242, the engagement connection between the first boss 1331 and the first cylindrical groove 1241 is more stable, and the first boss 1331 is not easy to disengage from the first cylindrical groove 1241, thereby strengthening the positioning and fixing strength of the bearing component 121 on the supporting platform 132; and when the groove depth of the second cylindrical groove 1242 is less than the groove depth of the first cylindrical groove 1241, and the height of the second boss 1332 is less than the height of the first boss 1331, it is convenient for the first boss 1331 to be inserted into the first cylindrical groove 1241, and the second boss 1332 to be inserted into the second cylindrical groove 1242 is also smoother.

[0071] In one embodiment, the structures of the plurality of first positioning members 124 are the same or different, and the structures of the plurality of second positioning members 133 are the same or different, and the corresponding snap-fit ​​connection between the first positioning members 124 and the second positioning members 133 can be achieved. Figure 2 and Figure 5 As shown, the structures of the multiple first positioning members 124 are different, and the structures of the multiple second positioning members 133 are the same, which can further reduce the risk of the bearing assembly 121 and the supporting platform 132 being displaced or separated from each other.

[0072] In one embodiment, the first positioning member 124 is an electromagnetic suction member, and the second positioning member 133 is engaged with the first positioning member 124 and magnetically connected. Specifically, the first positioning member 124 is an electromagnetic suction member, which can generate an adsorption force when powered on. After the first positioning member 124 and the second positioning member 133 are engaged, the first positioning member 124 is powered on, so that the first positioning member 124 and the second positioning member 133 are adsorbed together, further strengthening the positioning and fixation between the bearing assembly 121 and the supporting platform 132.

[0073] In one embodiment, the electromagnetic suction parts are symmetrically arranged relative to the geometric center of the support platform 132, which can increase the stability of the overall center of gravity of the workpiece to be welded. Specifically, the first positioning parts 124 can be all electromagnetic suction parts, or part of them can be electromagnetic suction parts, or part of them can be powered or part of them can not be powered. When the center of gravity of the workpiece to be welded is biased to one side, the first positioning parts 124 on the opposite side of the support platform 132 can be powered to overcome the problem of unstable center of gravity of the workpiece to be welded, thereby increasing the stability of positioning and fixing between the bearing assembly 121 and the support platform 132.

[0074] In one of the embodiments, electromagnetic suction components are arranged at both ends of the support platform 132 along the first direction; in order to carry a variety of workpieces to be welded, the bearing surface of the bearing component 121 is usually larger, and generally larger than the supporting surface of the support platform 132. When the overall center of gravity of the workpiece to be welded is close to one end of the bearing component 121, there is a risk that the bearing component 121 and the workpiece to be welded will topple from the support platform 132. Electromagnetic suction components are respectively arranged at both ends of the support platform 132 along the first direction to increase the bonding strength between the two ends of the bearing component 121 and the support platform 132, so that the positioning and fixation between the bearing component 121 and the support platform 132 are more stable.

[0075] In one embodiment, one or more anti-sucking holes 1321 are provided on the support platform 132 to prevent the support surface of the support platform 132 and the bottom surface of the support component 121 from generating excessive suction when the support platform 132 is separated from the support component 121, thereby preventing the support platform 132 from being separated from the support component 121. As shown in Figure 2, two square holes are used as an example in this embodiment. In other embodiments, the shape and number of the anti-sucking holes 1321 are not limited, as long as the support platform 132 and the support component 121 can be separated easily.

[0076] In an exemplary embodiment, please combine Figure 2 and Figure 7 The welding positioning system 100 further includes a first limit assembly 140, which is disposed on the side of the support platform 132 close to the upstream of the transmission assembly, and is used to limit the displacement of the load-bearing assembly 121 along the second direction. The transmission assembly of the present application can be transmitted in the forward and reverse directions of the second direction. The forward direction of the second direction in the present application refers to the transmission direction in which the transmission assembly unloads and transmits the load-bearing assembly 121 to the downstream station. The first limit assembly 140 is disposed on the side of the support platform 132 close to the upstream of the transmission assembly. When the transmission assembly is transmitted in the reverse direction, the displacement of the load-bearing assembly 121 along the second direction can be limited to prevent the risk of the load-bearing assembly 121 falling.

[0077] In one embodiment, please refer to Figure 7 The first limiting assembly 140 includes a first driving member 141 and a first floating wheel 142. The first driving member 141 is fixed on the welding workbench 101. The first floating wheel 142 is connected to the output end of the first driving member 141. The first driving member 141 can drive the first floating wheel 142 to float up and down on the transmission surface of the transmission assembly. Figure 7 The diagram schematically shows the states of the first floating roller 142 at different positions. When the first floating roller 142 is on the transmission surface of the transmission component, it can limit the displacement of the bearing component 121 in the second direction. When the first floating roller 142 is on the transmission surface of the transmission component, it can allow the bearing component 121 to pass through.

[0078] In an exemplary embodiment, the number of the first limiting components 140 may be one or more, and the number of the first floating wheels 142 of the first limiting components 140 may be one or more according to actual needs, such as Figure 2 As shown, two first limit assemblies 140 can be set on one side of the welding workbench 101, and each first limit assemblies 140 includes two first floating wheels 142. The first floating wheels 142 are in rolling contact with the bearing assembly 121. Compared with sliding friction, rolling friction has smaller friction force, which is beneficial to reducing the wear on the surface of the bearing assembly 121 and the first floating wheels 142.

[0079] In an exemplary embodiment, FIG. 2 and FIG. Figure 8 As shown, a second limiting assembly 150 is disposed downstream of the transmission assembly, and the second limiting assembly 150 is located on at least one side of the transmission path of the bearing assembly 121 to limit the displacement of the bearing assembly 121 along the first direction.

[0080] In one embodiment, please refer to Figure 8 The second limiting assembly 150 includes a second driving member 151 and a second floating wheel 152. The second driving member 151 is fixed on the welding workbench 101. The second floating wheel 152 is connected to the output end of the second driving member 151. The second driving member 151 can drive the second floating wheel 152 to float up and down on the transmission surface of the transmission assembly. Figure 8 The diagram schematically shows the status of the second floating roller 152 at different positions. In the case where the center of gravity of the workpiece to be welded is offset, the travel path of the carrying component 121 may be offset when it is transmitted through the transmission component. When the second floating wheel 152 is on the transmission surface of the transmission component, it can limit the displacement of the carrying component 121 in the first direction and adjust the travel path of the carrying component 121 so that it always runs along the second direction. When the second floating wheel 152 is on the transmission surface of the transmission component, the travel path of the carrying component 121 is not adjusted.

[0081] In an exemplary embodiment, the number of the second limiting components 150 can be one or more, and the second limiting components 150 can be arranged on the same side of the travel path of the bearing component 121, or on both sides of the travel path of the bearing component 121, and the number of the second limiting components 150 arranged on each side of the travel path of the bearing component 121 can be one or more. The number of the second floating wheels 152 of the second limiting components 150 can be set to one or more according to actual needs, such as Figure 2 As shown, the second floating wheel 152 is in rolling contact with the bearing assembly 121 , thereby reducing the wear on the surfaces of the bearing assembly 121 and the second floating wheel 152 .

[0082] like Figure 3 and Figure 6As shown, in an exemplary embodiment, rollers 125 are respectively provided at both ends of the bearing assembly 121, and when the transmission assembly is used to transmit the bearing assembly 121, the rollers 125 are connected to the inner side of the conveyor belt guard plate by rolling. The rollers 125 are provided on the end faces of the bearing assembly 121 opposite to the conveyor belt guard plate 112, and can be abutted against the conveyor belt guard plate 112 through the rollers 125. By providing the rollers 125, the friction between the bearing assembly 121 and the conveyor belt guard plate 112 can be converted from sliding friction to rolling friction, so that the sliding process can be smoother, and the transmission rate can be increased while reducing the friction loss of the bearing assembly 121 and the conveyor belt guard plate 112.

[0083] In an exemplary embodiment, one end of the roller 125 is connected to the bottom surface of the bearing assembly 121, and the other end is a free end. When the transmission assembly is used to transmit the bearing assembly 121, the free end of the roller 125 has no contact with the transmission assembly. Specifically, a receiving groove is provided at the bottom of the bearing assembly 121, and the roller 125 is installed in the receiving groove. The rolling surface of the roller 125 is parallel to or exceeds the side surfaces at both ends of the bearing assembly 121, so as to roll and abut against the inner side of the conveyor belt guard plate 112 to reduce friction; and the bottom of the roller 125 does not exceed the bottom surface of the bearing assembly 121, so that there is a gap between the roller 125 and the upper surface of the conveyor belt 111 during transmission, that is, the roller 125 has no contact with the conveyor belt 111, thereby avoiding the contact friction between the conveyor belt 111 and the roller 125 affecting the rolling connection between the roller 125 and the conveyor belt guard plate 112.

[0084] In an exemplary embodiment, Figure 6 As shown, a plurality of clamping members 122 are provided on the bearing assembly 121, and the plurality of clamping members 122 enclose a limiting space to limit the position of the workpiece to be detected on the bearing assembly 121. The clamping member 122 can be installed on the bearing assembly 121 through a connecting member, and can clamp the workpiece to be welded from two or more sides, and can be adjusted according to the actual needs of the workpiece to be welded to meet the clamping needs of workpieces to be welded of different shapes and specifications. In some embodiments, since high-temperature gas is usually generated during the welding process, the clamping member 122 can be made of high-temperature resistant material to avoid deformation or damage during the welding process. In a specific embodiment, the clamping member 122 may include structures such as a clamp, a positioning pin or a support block, and the clamping member 122 may also include a flexible structure, or may be connected to a driving member to provide an adjustable supporting force.

[0085] In one embodiment, the plurality of clamping members 122 include a fixed clamping member 1221 and a movable clamping member 1222. The fixed clamping member 1221 is located at one end of the supporting component 121 in the first direction, and the position of the movable clamping member 1222 in the first direction and the second direction is adjustable, so that it can be used to support workpieces to be welded of different specifications and quantities.

[0086] The utility model provides a battery module welding system, including the welding positioning system 100 described in any of the above embodiments, and a welding pressure head (not shown) of the battery module welding system. When the workpiece to be welded is welded, the welding pressure head applies pressure from above the workpiece to be welded to press the workpiece to be welded on the bearing assembly 121, and the transmission assembly and the support platform 132 can support the bearing assembly 121. In an exemplary embodiment, as Figure 1 As shown, the welding positioning system 100 is used to position the workpiece to be welded, which is a battery module 300 .

[0087] Among them, the battery module 300 is a structural unit composed of multiple single batteries (or called battery cells) arranged in a certain manner. The battery module 300 connects multiple battery cells together in series or parallel to increase the overall voltage or capacity. The battery cell can be cylindrical, square or soft-pack battery cell, etc. In some embodiments, the busbar can be used for the main current path, and the aluminum bar can be used to connect the secondary current path between the battery cells. Welding can provide a low-resistance, high-reliability electrical connection between the busbar and the aluminum bar, and can increase the strength of the mechanical connection.

[0088] The battery module welding system includes a welding positioning system 100, which includes a welding workbench 101, a carrying component 121, a transmission component and a lifting component, wherein the transmission component is arranged on the welding workbench 101, and the lifting component includes a lifting mechanism 131 and a supporting platform 132. The supporting platform 132 can be lifted up and down relative to the table surface of the welding workbench 101 under the action of the lifting mechanism 131. The carrying component 121 is used to carry the workpiece to be welded, and is also used to cooperate with the transmission component and the supporting platform 132 to position the workpiece to be welded on the welding station to complete the precise positioning of the workpiece to be welded. Finally, the transmission component unloads the carrying component 121 from the supporting platform 132.

[0089] In some embodiments, the surface of the bearing assembly 121 away from the workpiece to be welded is provided with a plurality of first positioning members 124, and the two ends of the bearing assembly 121 along the first direction are respectively provided with first positioning blocks 123. The transmission assembly is used to carry the bearing assembly 121 and unload the bearing assembly 121 from the self-supporting platform 132 after welding is completed to enter the downstream station; the transmission assembly includes two conveyor belts 111 arranged parallel to each other and spaced apart in the second direction and conveyor belt guards 112 arranged on both sides of the conveyor belts, and the first positioning blocks 123 are clamped on the conveyor belt guards 112. The support platform 132 is used to unload the load-bearing component 121 from the upstream conveying mechanism and load the load-bearing component 121 onto the transmission component; the support platform 132 can be raised and lowered between the two conveyor belts 111; a second positioning member 133 is provided on the support platform 132 corresponding to the first positioning member 124, and the second positioning member 133 is engaged and connected with the first positioning member 124, so that when the support platform 132 unloads the load-bearing component 121 from the upstream conveying mechanism, the load-bearing component 121 is positioned on the support platform 132.

[0090] When the bearing component 121 arrives at the welding station, the support platform 132 loads the bearing component 121 and the battery module 300 thereon, and the second positioning member 133 is engaged with the first positioning member 124 to position the bearing component 121 on the support platform 132; then the support platform 132 moves the bearing component 121 down to the same height as the transmission surface of the transmission component, and the first positioning block 123 is engaged with the conveyor belt guard plate 112, so that the bearing component 121 is supported by the support platform 132, the conveyor belt 111 and the conveyor belt guard plate 112 at the same time, and under the joint action of the engagement of the first positioning member 124 and the second positioning member 133 and the engagement of the first positioning block 123 and the conveyor belt guard plate 112, the bearing component 121, the transmission component and the support platform 132 form a precise and stable positioning structure, so that the parts to be welded on the bearing component 121 are accurately positioned and stably welded. After welding is completed, the support platform 132 is lowered below the table surface of the welding workbench 101, and the conveyor belt 111 conveys the carrying assembly 121 to the next station.

[0091] The present application realizes the loading of the bearing component 121 and the parts to be welded thereon through the support platform 132. While loading, the bearing component 121 and the support platform 132 are positioned. Then the support platform 132 descends to the same height as the support surface and the transmission surface of the transmission component. The bearing component 121 and the conveyor belt guard plate 112 of the transmission component are positioned. The parts to be welded are supported and positioned by the bearing component 121, the support platform 132 and the transmission component. They are no longer lifted and positioned, which avoids the displacement of the position of the parts to be welded during the lifting process and also avoids the possible tipping problem of the parts to be welded caused by crimping.

[0092] In an exemplary embodiment, the battery module welding system may also include components such as welding equipment, welding pressure head, sensor and monitoring subsystem, control subsystem, cooling and fume exhaust device, fixture and jig, safety protection device and data recording and analysis subsystem. Among them, the welding equipment may include one or more of laser welding equipment, ultrasonic welding equipment or arc welding equipment. The sensor and monitoring subsystem may include a visual detection sensor, a temperature sensor and an image processing unit. The control subsystem may include a controller and a human-machine interface. The cooling and fume exhaust device may include a coolant circulation system, a cooling fan and an exhaust device.

[0093] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0094] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A welding positioning system, characterized in that: The welding positioning system comprises: A bearing assembly, used for bearing the workpiece to be welded; a surface of the bearing assembly away from the workpiece to be welded is provided with a plurality of first positioning members, and two ends of the bearing assembly along a first direction are respectively provided with first positioning blocks; a transmission assembly, used for carrying the bearing assembly and unloading the bearing assembly; the transmission assembly comprises two conveyor belts arranged parallel to each other and spaced apart in a second direction and a conveyor belt guard plate arranged outside each of the conveyor belts, and the first positioning block is clamped on the conveyor belt guard plate; the second direction is perpendicular to the first direction; and A support platform is used to load the bearing assembly and load the bearing assembly to the transmission assembly; the support platform is escalably disposed between the two conveyor belts; a second positioning member is disposed on the support platform corresponding to the first positioning member, and the second positioning member is engaged and connected with the first positioning member; Wherein, when the welding positioning device is in a welding state, the support surface of the support platform is at the same height as the transmission surface of the transmission component, and the transmission component and the support platform jointly support the bearing component.

2. The welding positioning system according to claim 1, characterized in that: A groove is provided on the surface of the first positioning block close to the conveyor belt guard plate, the conveyor belt guard plate is embedded in the groove, and the groove width of the groove is greater than the thickness of the conveyor belt guard plate.

3. The welding positioning system according to claim 1, characterized in that: The first positioning member is a first cylindrical groove, the second positioning member is a first convex column, the groove depth of the first cylindrical groove is 1cm-3cm, and the height of the first convex column is 1cm-3cm.

4. The welding positioning system according to claim 3, characterized in that: A second cylindrical groove is arranged around the first cylindrical groove, and the shape of the second cylindrical groove is the same as or different from that of the first cylindrical groove; a second convex column is arranged around the first convex column corresponding to the second cylindrical groove, and the shape of the second convex column matches that of the second cylindrical groove; the second cylindrical groove is snap-connected with the second convex column.

5. The welding positioning system according to claim 1, characterized in that: At least part of the first positioning members are electromagnetic suction members, and the second positioning members are engaged with the first positioning members and are magnetically connected.

6. The welding positioning system according to claim 5, characterized in that: The electromagnetic suction components are arranged symmetrically with respect to the geometric center of the support platform; or the electromagnetic suction components are arranged at two ends of the support platform along the first direction.

7. The welding positioning system according to claim 1, characterized in that: Rollers are respectively arranged at both ends of the bearing assembly. When the transmission assembly is used to transmit the bearing assembly, the rollers are rollingly connected to the inner side of the conveyor belt guard plate.

8. The welding positioning system according to claim 1, characterized in that: The welding positioning system further comprises a first limiting component, which is arranged on a side of the supporting platform close to the upstream of the transmission component and is used to limit the displacement of the bearing component along the second direction.

9. The welding positioning system according to claim 1, characterized in that: A second limiting component is disposed downstream of the transmission component, and the second limiting component is located on at least one side of the transmission path of the bearing component to limit the displacement of the bearing component along the first direction.

10. A battery module welding system, characterized in that: It comprises a welding positioning system and a welding pressure head as described in any one of claims 1 to 9. When the workpiece to be welded is welded, the welding pressure head presses the workpiece to be welded on the supporting component, and the transmission component and the supporting platform can support the supporting component.

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