Battery pack stirring and welding tool

Abstract

The utility model provides a battery pack stirring welding tool which comprises a working table, a plurality of fixing devices and a plurality of cushion blocks, the fixing devices and the cushion blocks are arranged on the working table, and the cushion blocks are used for bearing battery pack frames. The fixing device comprises a linear moving assembly arranged on the workbench and a rotary downward-pressing air cylinder arranged at the moving end of the linear moving assembly. A rotating shaft of the rotary pressing cylinder is connected with a pressing arm, and the end part of the pressing arm is provided with a pressing block for pressing the battery wrapping frame and the bottom plate. According to the stirring and welding tool for the battery pack, the rotary pressing air cylinder is arranged, the pressing arm can be driven to fix a frame and a bottom plate of the battery pack, manual operation is not needed, the labor intensity of workers is reduced, meanwhile, the driving force of the rotary pressing air cylinder is controllable, and the accuracy and consistency of clamping operation are guaranteed. In addition, the linear moving assembly is arranged, the distance between the pressing arms can be adjusted so as to be suitable for battery wrapping frames and bottom plates of different sizes and specifications, and therefore the universality of the tool is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery package shell processing technical field, especially a kind of battery package stirring welding tool. BACKGROUND

[0002] Battery package as the core component of energy storage, its manufacturing quality is directly related to the performance and safety of entire system. In order to guarantee the strength of battery package shell, the connection of battery package frame and bottom plate is mostly fixed by stirring welding connection, so that it has better structural strength. When welding, positioning clamping is carried out to battery package frame and bottom plate by using tool, to ensure the stirring welding.

[0003] The existing fixed tool mostly uses simple clamping mechanism, needs to rely on manual operation fastening bolt and clamping plate to fix battery package frame and bottom plate, to complete the clamping work of parts. But the labor intensity of existing tool is larger, and the accuracy and consistency of each clamping operation are poor, and the clamping mechanism of existing tool is directly fixed on the bottom plate of tool, and the universality when dealing with different specifications of battery package is poor. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims at providing a kind of battery package stirring welding tool, reduces labor intensity, guarantees the accuracy and consistency of clamping operation, and improves the universality of tool.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A kind of battery package stirring welding tool, for fixing battery package frame and bottom plate lapped on the battery package frame, including workbench, and multiple fixed devices and multiple pads on the workbench;

[0007] Each pad is used to support the battery package frame, and each fixed device is arranged around the battery package frame;

[0008] The fixed device includes linear movement assembly provided on the workbench, and rotating down pressure cylinder provided on the moving end of the linear movement assembly;

[0009] The rotating down pressure cylinder is connected with pressure arm, and the end of the pressure arm is provided with pressure block for pressing the battery package frame and the bottom plate.

[0010] Further, the end of the pressure arm is screwed with vertically arranged screw rod, the pressure block is connected to the bottom end of the screw rod, and the top end of the screw rod is provided with handle.

[0011] Further, two sides of the pressing arm towards the adjacent fixing device are provided with photoelectric switches connected with the controller of the rotary down-pressing cylinder.

[0012] Further, the rotating directions of the pressing arms on the same side are same, and the length of each pressing arm is less than the distance between the adjacent two rotary down-pressing cylinders.

[0013] Further, the fixing devices are symmetrically arranged on the opposite sides of the battery pack frame.

[0014] Further, the workbench is provided with a supporting table for supporting the bottom plate.

[0015] Further, the top of the supporting table is provided with a heating assembly, which is an electric heating pipe embedded in the top of the supporting table and arranged in a coil shape.

[0016] Further, the linear moving assembly comprises a slide rail arranged on the workbench and a slide block slidingly arranged on the slide rail; the rotary down-pressing cylinder is connected to the slide block, and the slide block is provided with a clamp.

[0017] Further, the clamp comprises a brake block, a double-headed screw rod and a handle connected to one end of the double-headed screw rod; the brake block comprises a left brake block and a right brake block, which are respectively arranged on the two sides of the slide rail and slidingly arranged in the slide block; the double-headed screw rod has two thread segments with opposite rotation directions, and the left brake block and the right brake block are respectively screwed on the two thread segments; when the handle is operated to rotate the double-headed screw rod, the left brake block and the right brake block can clamp or release the slide rail.

[0018] Further, each pad corresponds to each fixing device, and another slide block for mounting the pad is slidingly arranged on the slide rail.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The battery pack stirring and welding tool can drive the pressing arms to fix the battery pack frame and the bottom plate without manual operation, thereby reducing the labor intensity, and the driving force of the rotary down-pressing cylinder is controllable, so that the pressing force on the battery pack frame and the bottom plate can be accurately controlled, and the accuracy and consistency of the clamping operation are ensured.

[0021] In addition, the pressing block is connected to the screw rod, the screw rod is rotated by operating the handle, the distance between the pressing block and the pressing arm can be adjusted to cope with battery pack frames of different height sizes, and the universality is improved. The pressing arm is provided with a photoelectric switch, the photoelectric switch can detect the approach of the stirring needle, and the pressing arm is avoided by the stirring needle through the controller controlling the rotary down-pressing cylinder, so that the continuity of stirring and welding is ensured. The rotating directions of the pressing arms on the same side are the same, and the length of each pressing arm is less than the distance between two adjacent rotary down-pressing cylinders, so that interference and collision between the pressing arms are prevented when the pressing arms rotate and avoid.

[0022] In addition, the fixing devices are symmetrically arranged on opposite sides of the battery pack frame, which can ensure that the stress of the battery pack frame is uniform to a certain extent during the pressing and fixing process. The workbench is provided with a supporting table, which can support the bottom plate to reduce the deformation of the bottom plate. The top of the supporting table is provided with a heating assembly, which can heat the bottom plate during welding to release the stress of the bottom plate.

[0023] Furthermore, the linear movement assembly comprises a sliding rail arranged on the workbench and a sliding block slidingly arranged on the sliding rail. Through the cooperation of the sliding rail and the sliding block, the rotary down-pressing cylinder slides on the sliding rail through the sliding block, so that the rotary down-pressing cylinder is positioned on the workbench. The clamp includes a brake block, a double-headed screw, and a handle connected to one end of the double-headed screw. When the handle is operated to rotate the double-headed screw, the left brake block and the right brake block can clamp or release the sliding rail to fix the sliding block, i.e., the rotary down-pressing cylinder. Another sliding block for mounting a pad is also slidingly arranged on the sliding rail to facilitate the arrangement of the pad and ensure the pressing and fixing effect. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of this patent, are included to provide a further understanding of the application and are incorporated herein in their entirety. The embodiments of the application, together with its advantages, can be understood by a study of the following detailed written description taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 The workbench described in the embodiments of the present application is;

[0026] Figure 2 The internal structure diagram of the sliding block described in the embodiments of the present application is;

[0027] Explanation of reference signs:

[0028] 1, workbench; 101, supporting table; 102, electric heating tube;

[0029] 2, pad;

[0030] 3, linear movement assembly; 301, sliding rail; 302, sliding block; 3021, double-headed screw; 3022, handle; 3023, left brake block; 3024, right brake block;

[0031] 4. Rotary pressing cylinder; 401. Pressing arm; 402. Pressing block; 403. Screw; 404. Handle; 405. Photoelectric switch;

[0032] 5. Battery pack frame;

[0033] 6. Base plate. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0036] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] This embodiment relates to a battery pack stir welding fixture, used to fix the battery pack frame 5 and the base plate 6 overlapping the battery pack frame 5. In terms of overall structure, as follows... Figure 1 As shown, the battery pack stirring welding fixture of this embodiment includes a worktable 1, and a plurality of fixing devices and a plurality of pads 2 disposed on the worktable 1.

[0040] Each of the fixing devices is arranged around the battery pack frame 5 and is used for clamping the battery pack frame 5.

[0041] The fixing device comprises a linear moving assembly 3 arranged on the workbench 1 and a rotary pressing cylinder 4 arranged on a moving end of the linear moving assembly 3. A rotating shaft of the rotary pressing cylinder 4 is connected with a pressing arm 401, and an end of the pressing arm 401 is provided with a pressing block 402 used for pressing the battery pack frame 5 and the bottom plate 6.

[0042] During clamping, the rotary pressing cylinder 4 can drive the pressing arm 401 to rotate and descend so as to press the battery pack frame 5 and the bottom plate 6 by the pressing block 402. After welding, the rotary pressing cylinder 4 can drive the pressing arm 401 to ascend and rotate so as to avoid the battery pack frame 5, thereby facilitating the removal of the welded battery pack frame 5.

[0043] As arranged above, the rotary pressing cylinder 4 can drive the pressing arm 401 to clamp the battery pack frame 5 and the bottom plate 6 without manual operation, thereby reducing the labor intensity. Meanwhile, the driving force of the rotary pressing cylinder 4 is controllable, so as to accurately control the pressing force on the battery pack frame 5 and the bottom plate 6, thereby ensuring the accuracy and consistency of clamping. In addition, the linear moving assembly 3 can adjust the distance between the pressing arms 401 on the opposite sides, so as to adapt to battery pack frames 5 and bottom plates 6 of different sizes, thereby improving the versatility of the tooling.

[0044] Based on the above overall introduction, specifically, the battery pack frame 5 and the bottom plate 6 are welded by stirring, and there is a certain lap joint gap at the edges of the battery pack frame 5 and the bottom plate 6. In order to prevent the bottom plate 6 from deviating during welding and causing the lap joint gap to be too large and affecting the welding quality, the pressing block 402 of the present embodiment is pressed at the lap joint gap between the battery pack frame 5 and the bottom plate 6, so as to avoid the deviation of the bottom plate 6, thereby ensuring that the size of the lap joint gap remains unchanged and avoiding affecting the welding quality.

[0045] In addition, each of the fixing devices of the present embodiment can be arranged around the battery pack frame 5, or can also be arranged on the opposite sides of the battery pack frame 5, so as to ensure the clamping effect on the battery pack frame 5 and the bottom plate 6.

[0046] In order to further improve the versatility of the present embodiment, the battery pack frame 5 of different size specifications is compatible. The end of the pressing arm 401 of the present embodiment is screwed with a vertically arranged screw rod 403, the pressing block 402 is connected to the bottom end of the screw rod 403, and the top end of the screw rod 403 is provided with a handle 404. By operating the handle 404 to rotate the screw rod 403, the distance between the pressing block 402 and the pressing arm 401 can be adjusted to cope with battery pack frames 5 of different height sizes, ensuring the fixing effect of the battery pack frame 5 and the bottom plate 6, and improving the versatility. In specific implementation, the above-mentioned handle 404 is a key handle 404, so as to facilitate holding and rotating the above-mentioned screw rod 403, and the pressing block 402 of the present embodiment can adopt conventional elastic materials known to those skilled in the art, such as rubber, resin, etc. In order to prevent the pressing block 402 from causing damage to the surface of the battery pack frame 5 and the bottom plate 6 when the clamping force is too large.

[0047] In addition, it can be understood that the battery pack frame 5 and the bottom plate 6 of the present embodiment are welded by stirring, and the lap gap between the battery pack frame 5 and the bottom plate 6 serves as a welding bead, and the stirring needle for welding moves along the welding bead to complete the welding of the battery pack frame 5 and the bottom plate 6. Since the stirring needle will interfere with the fixing device, i.e. the pressing arm 401 when moving.

[0048] Therefore, the two sides of the pressing arm 401 of the present embodiment facing the adjacent fixing devices are provided with a photoelectric switch 405, and the photoelectric switch 405 is connected with the controller of the rotary down pressure cylinder 4. When the stirring needle moves towards the pressing arm 401, the photoelectric switch 405 is triggered and a control signal is generated to the controller. Then the controller controls the rotary down pressure cylinder 4 to lift and rotate the pressing arm 401, so that the pressing arm 401 avoids the stirring needle, ensuring the continuity of the stirring welding and improving the welding processing efficiency.

[0049] In specific implementation, when the photoelectric switch 405 on one pressing arm 401 is triggered, the corresponding rotary down pressure cylinder 4 controls the pressing arm 401 to rotate to avoid the stirring needle. Until the stirring needle triggers the photoelectric switch 405 on the next pressing arm 401, and after a predetermined time, the controller controls the previous pressing arm 401 to reset through the rotary down pressure cylinder 4, so as to avoid the collision between the pressing arm 401 and the stirring needle. In addition, the controller of the present embodiment is a PLC control system, and the photoelectric switch 405 of the present embodiment can adopt a diffuse reflection type photoelectric switch 405, which can be triggered in time when the stirring needle approaches.

[0050] Further, in order to prevent interference between adjacent pressing arms 401 when avoiding the stirring needle, in the embodiment, the rotating direction of each pressing arm 401 on the same side is the same, and the length of each pressing arm 401 is less than the distance between adjacent two rotating down pressure cylinders 4. The pressing arms 401 are prevented from rotating towards each other while ensuring that there is enough distance between the pressing arms 401 to avoid interference and knocking between the pressing arms 401. In specific implementation, the distance between adjacent two fixing devices is less than 350 mm, so as to prevent the fixing devices from being too far apart and affecting the clamping and fixing effect of the battery pack frame 5 and the bottom plate 6. At the same time, in order to ensure the pressing effect, at least three fixing devices should be provided on each side of the battery pack frame 5.

[0051] It is worth mentioning that the fixing devices in the embodiment are symmetrically arranged on opposite sides of the battery pack frame 5. Through the symmetric arrangement of the fixing devices, the stress on the battery pack frame 5 during the pressing and fixing process can be ensured to be uniform to some extent, and the deformation of the battery pack frame 5 affecting the welding effect is avoided.

[0052] As a specific implementation form, the workbench 1 of the embodiment is provided with a supporting table 101 for supporting the bottom plate 6. It can be understood that since the bottom plate 6 only has an edge lap joint on the battery pack frame 5, if the central part of the bottom plate 6 is not supported, the bottom plate 6 is easy to deform due to its own weight, thereby affecting the welding effect. Therefore, through the arrangement of the supporting table 101, the supporting table 101 can support the middle part of the bottom plate 6 to reduce the deformation of the bottom plate 6 due to its own weight and improve the welding effect.

[0053] Specifically, the top of the supporting table 101 is provided with a heating assembly, which is an electric heating pipe 102 embedded in the top of the supporting table 101 and arranged in a coil. When the fixing device presses the battery pack frame 5 and the bottom plate 6, the electric heating pipe 102 on the supporting table 101 can heat the bottom plate 6 on the supporting table 101, so that the bottom plate 6 reaches a certain temperature. By heating the bottom plate 6 to release the stress generated during stirring welding, the deformation of the bottom plate 6 is further reduced, and the flatness of the bottom plate 6 is improved.

[0054] As a specific implementation form, the linear moving assembly 3 of the embodiment includes a slide rail 301 provided on the workbench 1 and a sliding block 302 slidingly provided on the slide rail 301. The rotating down pressure cylinder 4 is connected to the sliding block 302, and a clamping device is provided on the sliding block 302. Through the cooperation of the slide rail 301 and the sliding block 302, the rotating down pressure cylinder 4 slides on the slide rail 301 through the sliding block 302, and the clamping device on the sliding block 302 can effectively fix the position of the sliding block 302, so as to realize the movement and positioning of the rotating down pressure cylinder 4 on the workbench 1, thereby improving the compatibility of the battery pack frame 5 of different sizes.

[0055] Specifically, as shown inFigure 2 As shown, the clamp of the embodiment includes brake blocks, a double-headed screw 3021, and a handle 3022 connected to one end of the double-headed screw 3021. The brake blocks include left brake blocks 3023 and right brake blocks 3024, which are respectively arranged on the two sides of the slide rail 301 and are slidably arranged in the slide block 302. The double-headed screw 3021 has two thread segments with opposite rotation directions, and the left brake blocks 3023 and the right brake blocks 3024 are respectively screwed on the two thread segments.

[0056] Through the arrangement of the brake blocks and the double-headed screw 3021, when the handle 3022 is operated to rotate the double-headed screw 3021, the left brake blocks 3023 and the right brake blocks 3024 can move away from or close to each other, so as to clamp or release the slide rail 301, thereby realizing the fixation of the slide block 302 and the rotary down-pressing cylinder 4. In a specific implementation, in order to prevent the slide block 302 and the slide rail 301 from falling off due to the reaction force of the compression rod when the rotary down-pressing cylinder 4 drives the compression rod to compress the battery pack frame 5, the slide rail 301 of the embodiment can adopt a dovetail groove slide block 302, which can limit the slide block 302 in the height direction.

[0057] Finally, in order to further ensure the compression and fixation effect of the battery pack frame and the bottom plate 6, each pad 2 of the embodiment corresponds to each fixing device, and another slide block 302 for mounting the pad 2 is also slidably arranged on the slide rail 301. By arranging the corresponding pad 2 and the rotary down-pressing cylinder 4 on the same slide rail 301 through the slide block 302, when the battery pack frame and the bottom plate 6 are compressed and fixed, the corresponding compression block 402 and the pad 2 can jointly clamp the battery pack frame 5, so as to prevent the compression block 402 and the pad 2 from deviating in the height direction, ensure the compression and fixation effect, and prevent the battery pack frame 5 from deforming. At the same time, the pad 2 is slidably arranged on the slide rail 301 through the slide block 302, which can facilitate the position fixation of the pad 2 and facilitate the change of the position of the pad 2 to adapt to battery pack frames 5 of different sizes.

[0058] In summary, the battery pack stirring and welding tool of the embodiment can drive the compression arm 401 to fix the battery pack frame 5 and the bottom plate 6 through the arrangement of the rotary down-pressing cylinder 4, without manual operation, thereby reducing the labor intensity. At the same time, the driving force of the rotary down-pressing cylinder 4 is controllable, which can accurately control the compression force of the battery pack frame 5 and the bottom plate 6, thereby ensuring the accuracy and consistency of the clamping operation. In addition, through the arrangement of the linear moving assembly 3, the spacing between the compression arms 401 on the opposite sides can be adjusted to adapt to battery pack frames 5 and bottom plates 6 of different sizes, thereby improving the universality of the tool of the embodiment.

[0059] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1.A battery pack stirring welding tool for fixing a battery pack frame and a bottom plate lapped on the battery pack frame, characterized in that: it comprises a workbench, a plurality of fixing devices and a plurality of pads arranged on the workbench; each pad is used for supporting the battery pack frame, and each fixing device is arranged around the battery pack frame; the fixing device comprises a linear moving assembly arranged on the workbench and a rotary pressing cylinder arranged on a moving end of the linear moving assembly; a pressing arm is connected with a rotating shaft of the rotary pressing cylinder, and an end of the pressing arm is provided with a pressing block used for pressing the battery pack frame and the bottom plate. 2.The battery pack stirring welding tool according to claim 1, characterized in that: an end of the pressing arm is screwed with a vertically arranged screw rod, the pressing block is connected with a bottom end of the screw rod, and a top end of the screw rod is provided with a handle. 3.The battery pack stirring welding tool according to claim 1, characterized in that: two sides of the pressing arm facing the adjacent fixing devices are provided with photoelectric switches, and the photoelectric switches are connected with a controller of the rotary pressing cylinder. 4.The battery pack stirring welding tool according to claim 1, characterized in that: the rotating directions of the pressing arms on the same side are the same, and the length of each pressing arm is less than the distance between two adjacent rotary pressing cylinders. 5.The battery pack stirring welding tool according to claim 1, characterized in that: each fixing device is symmetrically arranged on opposite sides of the battery pack frame. 6.The battery pack stirring welding tool according to claim 1, characterized in that: the workbench is provided with a supporting table used for supporting the bottom plate. 7.The battery pack stirring welding tool according to claim 6, characterized in that: a top of the supporting table is provided with a heating assembly, and the heating assembly is an electric heating pipe embedded in the top of the supporting table and arranged in a coil shape. 8.The battery pack stirring welding tool according to any one of claims 1 to 7, characterized in that: the linear moving assembly comprises a slide rail arranged on the workbench and a slide block slidably arranged on the slide rail; the rotary pressing cylinder is connected with the slide block, and the slide block is provided with a clamp. 9.The battery pack stirring welding tool according to claim 8, characterized in that: the clamp comprises a brake block, a double-headed screw rod and a handle connected with one end of the double-headed screw rod; the brake block comprises a left brake block and a right brake block, the left brake block and the right brake block are separately arranged on two sides of the slide rail and slidably arranged in the slide block; the double-headed screw rod has two thread segments with opposite rotation directions, and the left brake block and the right brake block are screwed on the two thread segments, respectively; when the handle is operated to rotate the double-headed screw rod, the left brake block and the right brake block can clamp or release the slide rail. 10.The battery pack stirring welding tool according to claim 8, characterized in that: each pad corresponds to each fixing device, and another slide block used for mounting the pad is slidably arranged on the slide rail. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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