A shaping tool for a battery pack case without cross beam structure

Abstract

The utility model discloses a kind of shaping tool for battery pack box without beam structure, it includes: base, shaping platform, movable connecting mechanism, shaping platform positioning mechanism, modularized cushion block and press device.Shaping platform is set in base, shaping platform is provided with support mesa and box positioning structure.Movable connecting mechanism is set between base and shaping platform, shaping platform is movably set in base by movable connecting mechanism and can move back and forth relative to base.Shaping platform positioning mechanism is configured to position the front and back positions of shaping platform relative to base.Modularized cushion block is set multiple and can be installed in the different positions of the support mesa of shaping platform.Press device includes at least two press components, press component is mounted to base and is arranged along left and right direction, press component is provided with the pressure head that can be servoed up and down, and pressure head is located on the upside of shaping platform.The above-mentioned shaping tool can accurately, controllably and efficiently shape battery pack box.

Description

Technical Field

[0001] This utility model relates to production equipment for power batteries, and in particular to a shaping fixture for battery pack housings without crossbeams or longitudinal beams. Background Technology

[0002] With the increasing demands for energy density in power battery packs, large-module and even module-less technologies have become mainstream. To reduce weight and increase internal space, a lower housing design that omits the traditional horizontal and vertical beam frame structure has emerged. While this type of housing offers significant advantages, its structural rigidity is significantly reduced, and its bending moment resistance is poor. It is highly susceptible to uncontrollable plastic deformation during high-heat welding, clamp release, and hoisting. The aforementioned housing deformation trends are highly consistent, often manifesting as upward or downward warping at the left and right ends or four corners, leading to severe deviations in the flatness and contour of the areas used for module installation or sealing. Excessive deviations in module installation contour result in uneven gaps between the cell modules and the housing, affecting heat dissipation performance and structural reliability.

[0003] Traditional methods for shaping deformed enclosures involve localized hammering or jacking. However, these methods are inefficient, rely entirely on worker experience, and cannot quantify the force application point and shaping amount, easily causing secondary damage (such as hidden cracks in the sheet metal or localized overstretching), resulting in inconsistent quality. Even though coordinate measuring machines (CMMs) or large inspection tools can accurately detect the amount and location of deformation, there is a lack of matching equipment capable of precisely executing reverse corrections, leading to difficulties in correcting errors, production delays, and high product scrap rates. Therefore, the industry urgently needs an automated tooling specifically designed for such special structural enclosures, capable of precise, controllable, and efficient shaping, to fill the critical technological gap between "inspection" and "qualification." Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a shaping fixture for battery pack housings without crossbeams or longitudinal beams, which can achieve precise, controllable, and efficient shaping.

[0005] A shaping fixture for a battery pack housing without horizontal or vertical beams, according to an embodiment of the present invention, comprises: a base; a shaping platform disposed on the base, the shaping platform having a support surface and a housing positioning structure, the housing positioning structure being used to position the housing placed on the support surface; a movable connecting mechanism disposed between the base and the shaping platform, the shaping platform being movably disposed on the base via the movable connecting mechanism and capable of moving back and forth relative to the base; a shaping platform positioning mechanism configured to position the front and rear positions of the shaping platform relative to the base; multiple modular pads configured to be installed at different positions on the support surface of the shaping platform, the upper end of each modular pad having a housing support surface; and a pressing device comprising at least two pressing components, the pressing components being installed on the base and arranged in a left-right direction, each pressing component having a pressing head capable of vertical servo movement, the pressing head being located on the upper side of the shaping platform.

[0006] According to an embodiment of the present invention, a shaping fixture for a battery pack housing without crossbeams or longitudinal beams has at least the following beneficial effects: The shaping fixture uses modular pads for bottom side support. The modular pads can provide precise reverse support during shaping, avoiding pressure concentration that could lead to local instability, and effectively releasing shaping stress, thereby improving the accuracy and quality of shaping. By using multiple sets of pressing components and a movable shaping platform, multi-point pressing shaping at different locations can be achieved, resulting in high shaping efficiency, good shaping effect, and adaptability to shaping of housings of different models and specifications. The pressing components are equipped with pressure heads that can move up and down servo-driven, allowing for controllable and accurate pressing, precise shaping, and excellent quality consistency.

[0007] According to some embodiments of the present invention, the movable connecting mechanism includes a track and a traveling wheel. The track is fixed to the base in the front-to-back direction, and the traveling wheel is connected to the shaping platform. The traveling wheel is adapted to and cooperates with the track.

[0008] According to some embodiments of the present invention, at least two tracks are provided and arranged at intervals in the left-right direction, and at least two sets of walking wheels are provided, with each set of walking wheels corresponding to one track and each set of walking wheels having at least two walking wheels arranged at intervals in front and behind.

[0009] According to some embodiments of the present invention, the shaping platform positioning mechanism is a stop structure disposed on the track. The position of the stop structure along the track is adjustable. The stop structure is used to stop the traveling wheels to position the front and rear positions of the shaping platform.

[0010] According to some embodiments of the present invention, the housing positioning structure includes a left front positioning component, a right front positioning component, a left rear positioning component, and a right rear positioning component. Each of the left front positioning component, the right front positioning component, the left rear positioning component, and the right rear positioning component includes two contoured positioning blocks. The contoured positioning blocks are fixed to the base by mounting brackets. The contoured positioning blocks are provided with housing side fitting surfaces. The housing side fitting surfaces of the two contoured positioning blocks enclose and form housing corner fitting positions.

[0011] According to some embodiments of this utility model, the pressing component is provided at both the left and right ends of the shaping platform.

[0012] According to some embodiments of the present invention, the pressing component includes a servo up-and-down driver, and the pressing head is fixed to the actuating component of the servo up-and-down driver.

[0013] According to some embodiments of the present invention, the base is provided with a connecting frame, which is a gantry frame and spans the upper side of the shaping platform. The servo up and down drive is fixed to the crossbeam of the connecting frame.

[0014] According to some embodiments of this utility model, the servo up / down driver is connected to a displacement sensor and a pressure sensor.

[0015] According to some embodiments of this utility model, the lower end face of the pressure head is a contoured surface adapted to the housing.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present invention; Figure 3 for Figure 1 Enlarged view of point A; Figure 4 for Figure 1 Enlarged view of point B; Figure 5 for Figure 1 Enlarged diagram of point C.

[0018] Figure label: Base 100, connecting bracket 110; Shaping platform 200, support table 210, box positioning structure 220, left front positioning component 221, right front positioning component 222, left rear positioning component 223, right rear positioning component 224, contour positioning block 225, mounting bracket 226. 300 movable connecting mechanism, 310 track, 320 traveling wheels; Plastic surgery platform positioning mechanism 400; Modular pad block 500; The pressing device 600, the pressing assembly 610, the pressing head 611, and the servo up and down driver 612 are included. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 5A shaping fixture for battery pack housings without crossbeams or longitudinal beams includes: a base 100, a shaping platform 200, a movable connecting mechanism 300, a shaping platform positioning mechanism 400, modular pads 500, and a pressing device 600. The shaping platform 200 is disposed on the base 100 and includes a support surface 210 and a housing positioning structure 220. The housing positioning structure 220 is used to position the housing placed on the support surface 210. The movable connecting mechanism 300 is disposed between the base 100 and the shaping platform 200, allowing the shaping platform 200 to be movably mounted on the base 100 and to move back and forth relative to the base 100. The shaping platform positioning mechanism 400 is configured to position the shaping platform 200 relative to the base 100. Multiple modular pads 500 are provided, and the modular pads 500 are configured to be installed at different positions on the support surface 210 of the shaping platform 200. The upper end of the modular pad 500 is provided with a box support surface 510. The pressing device 600 includes at least two pressing components 610. The pressing components 610 are installed on the base 100 and arranged in the left-right direction. The pressing components 610 are provided with a pressing head 611 that can move up and down servo. The pressing head 611 is located on the upper side of the shaping platform 200.

[0024] During the shaping of the enclosure, the enclosure is placed on the shaping platform 200. Modular pads 500 are placed at different positions on the support surface 210 of the shaping platform 200 based on the detected deformation location. The enclosure is supported by the enclosure support surface 510 of the modular pads 500, and the enclosure positioning structure 220 positions the enclosure. Then, based on the deformation location, the shaping platform 200 is moved to the underside of the pressing device 600, and the shaping platform 200 is positioned by the shaping platform positioning mechanism 400, ensuring that the pressing head 611 is accurately aligned with the target point. Next, the pressing device 600 is activated, and the pressing head 611 is servo-driven to perform gradual, quantitative pressing shaping of the target point. Finally, the pressing pressure is maintained for a predetermined time to fully release material stress. After a single shaping operation, key point measurements can be performed offline or online. Based on the measurement results, it is determined whether further shaping or multi-point sequential shaping is necessary until the flatness and contour of the enclosure meet the tolerance requirements.

[0025] The aforementioned shaping fixture uses modular pads 500 for bottom support. The modular pads 500 provide precise reverse support during shaping, preventing pressure concentration from causing local instability and effectively releasing shaping stress, thereby improving the accuracy and quality of shaping. By using multiple sets of pressing components 610, in conjunction with a movable shaping platform 200, multi-point pressing shaping at different locations can be achieved, resulting in high shaping efficiency, good shaping effect, and adaptability to shaping of different models and specifications of boxes. The pressing components 610 are equipped with pressing heads 611 that can move up and down servo, making the pressing amount controllable, accurate, precise, and with excellent quality consistency.

[0026] In one embodiment, an array of screw holes can be formed on the support surface 210 of the shaping platform 200, and the modular pad 500 can have mounting holes. Screws are used to fix the pads to different screw holes, thus enabling them to be installed at different positions on the support surface 210 of the shaping platform 200. It is conceivable that in other embodiments, the modular pad 500 can also be equipped with magnets, and since the shaping platform 200 is made of ferrous material, the modular pad 500 can be installed at different positions on the support surface 210 by magnetic attraction.

[0027] In this embodiment, the upper surface of the modular pad 500 is provided with a box support surface 510. The box support surface 510 can be configured to adapt to the box. When the bottom surface of the box is flat, the box support surface 510 can be flat. When the bottom surface of the box is concave or convex, the box support surface 510 can be an adaptable concave or convex surface.

[0028] In this embodiment, the movable connection mechanism 300 includes a track 310 and a traveling wheel 320. The track 310 is fixed to the base 100 in the front-to-back direction, and the traveling wheel 320 is connected to the shaping platform 200. The traveling wheel 320 is adapted to and cooperates with the track 310. The movable connection mechanism 300 uses the track 310 and the traveling wheel 320, which has a simple structure and smooth movement.

[0029] In one embodiment, an annular groove is formed on the circumference of the traveling wheel 320, and the annular groove is engaged with the track 310 to achieve a fit. In some embodiments, the track 310 may also have a groove formed along its length, and the traveling wheel 320 is disposed in the groove, which can also achieve a fit between the groove and the traveling wheel 320.

[0030] In this embodiment, at least two tracks 310 are provided and arranged at intervals in the left-right direction. At least two sets of wheels 320 are provided, with each set of wheels 320 corresponding to one track 310, and each set of wheels 320 having at least two wheels 320 arranged at intervals in front and behind. With the above structure, the support for the shaping platform 200 is more stable and balanced.

[0031] It is conceivable that in other embodiments, the movable connection mechanism 300 is not limited to the structure described above, for example, it may adopt a linear guide rail or guide rod and guide sleeve structure, which can be configured according to the actual situation.

[0032] In this embodiment, the shaping platform positioning mechanism 400 is a stop structure disposed on the track 310. The position of the stop structure along the track 310 is adjustable, and the stop structure is used to stop the traveling wheels 320 to position the shaping platform 200 in the front and rear directions. The shaping platform positioning mechanism 400 adopts the above-described structure, which is simple and easy to implement.

[0033] In one embodiment, the stop structure includes two clamping blocks that clamp the track 310, and a screw connecting the two clamping blocks to lock them together. When the screw is loosened, the two clamping blocks can move along the track 310, thereby achieving position adjustment; when the screw is tightened, the track 310 is clamped, thereby fixing the position and achieving stop positioning for the traveling wheel 320. It is conceivable that in other embodiments, the stop structure can be a sliding block, which is slidably disposed on the track 310, and a positioning screw is threaded onto the sliding block. Positioning is achieved by the positioning screw pressing against the track 310 when tightened; when position adjustment is needed, the screw can be loosened.

[0034] It is conceivable that in other embodiments, the shaping platform positioning mechanism 400 is not limited to the structure described above, for example, it may adopt a brake structure set on the walking wheel 320, etc., and the specific configuration can be made according to the actual situation.

[0035] In this embodiment, the housing positioning structure 220 includes a left front positioning component 221, a right front positioning component 222, a left rear positioning component 223, and a right rear positioning component 224. Each of the left front positioning component 221, right front positioning component 222, left rear positioning component 223, and right rear positioning component 224 includes two contour positioning blocks 225. The contour positioning blocks 225 are fixed to the base 100 by mounting brackets 226. Each contour positioning block 225 has a housing side fitting surface 2251, and the housing side fitting surfaces 2251 of the two contour positioning blocks 225 enclose a housing corner fitting position. The shaping platform positioning mechanism 400 adopts the above structure, which can accurately position the housing. The positioning structure is simple and easy to implement.

[0036] It is conceivable that the positioning mechanism 400 of the shaping platform is not limited to the structure described above; for example, it could employ a positioning pin, which could engage with a pin hole on the housing for positioning. It is understood that there are many other implementation methods for workpiece positioning in this field, and those skilled in the art can make specific configurations according to actual conditions.

[0037] In this embodiment, pressing components 610 are respectively provided at both the left and right ends of the shaping platform 200. Using the above structure, it is possible to shape cases where the left and right sides of the housing are raised or the middle is concave or convex.

[0038] In this embodiment, the pressing assembly 610 includes a servo up-and-down driver 612, and the pressing head 611 is fixed to the moving part of the servo up-and-down driver 612. In this embodiment, the servo up-and-down driver 612 can be a servo cylinder or a servo electric cylinder, thereby realizing the servo movement of the pressing head 611.

[0039] In this embodiment, the base 100 is provided with a connecting frame 110, which is a gantry frame spanning the upper side of the shaping platform 200. The servo up / down driver 612 is fixed to the crossbeam of the connecting frame 110. Using this structure, the servo up / down driver 612 can be easily installed.

[0040] In this embodiment, the servo up / down driver 612 is connected to a displacement sensor and a pressure sensor, thereby enabling accurate measurement of displacement and pressure and achieving accurate quantitative shaping.

[0041] In this embodiment, the lower end face of the pressure head 611 is a contoured surface adapted to the housing, thereby enabling it to fit the housing and improve the shaping quality.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A shaping fixture for a battery pack housing without transverse or longitudinal beams, characterized in that, include: Base (100); A shaping platform (200) is disposed on the base (100). The shaping platform (200) is provided with a support table (210) and a box positioning structure (220). The box positioning structure (220) is used to position the box placed on the support table (210). A movable connecting mechanism (300) is disposed between the base (100) and the shaping platform (200). The shaping platform (200) is movably disposed on the base (100) via the movable connecting mechanism (300) and can move back and forth relative to the base (100). The shaping platform positioning mechanism (400) is configured to position the shaping platform (200) relative to the base (100) in the front and rear positions; Modular pads (500) are provided in multiples. The modular pads (500) are configured to be installed at different positions on the support surface (210) of the shaping platform (200). The upper end of the modular pads (500) is provided with a box support surface (510). The pressing device (600) includes at least two pressing components (610), which are mounted on the base (100) and arranged in the left-right direction. Each pressing component (610) is provided with a pressing head (611) that can move up and down by servo. The pressing head (611) is located on the upper side of the shaping platform (200).

2. The shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 1, characterized in that: The movable connection mechanism (300) includes a track (310) and a walking wheel (320). The track (310) is fixed to the base (100) in the front-back direction. The walking wheel (320) is connected to the shaping platform (200). The walking wheel (320) is adapted to and cooperates with the track (310).

3. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 2, characterized in that: At least two tracks (310) are provided and arranged at intervals in the left and right direction. At least two sets of walking wheels (320) are provided. Each set of walking wheels (320) corresponds to one track (310). Each set of walking wheels (320) has at least two walking wheels (320) arranged at intervals in front and behind.

4. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 2, characterized in that: The shaping platform positioning mechanism (400) is a stop structure set on the track (310). The position of the stop structure along the track (310) is adjustable. The stop structure is used to stop the traveling wheel (320) to position the front and rear of the shaping platform (200).

5. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 1, characterized in that: The housing positioning structure (220) includes a left front positioning component (221), a right front positioning component (222), a left rear positioning component (223), and a right rear positioning component (224). Each of the left front positioning component (221), the right front positioning component (222), the left rear positioning component (223), and the right rear positioning component (224) includes two contoured positioning blocks (225). The contoured positioning blocks (225) are fixed to the base (100) by mounting brackets (226). The contoured positioning blocks (225) are provided with housing side fitting surfaces (2251). The housing side fitting surfaces (2251) of the two contoured positioning blocks (225) enclose and form a housing corner fitting position.

6. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 1, characterized in that: The pressing component (610) is provided at both the left and right ends of the shaping platform (200).

7. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 1, characterized in that: The pressing assembly (610) includes a servo up-down driver (612), and the pressing head (611) is fixed to the actuating component of the servo up-down driver (612).

8. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 7, characterized in that: The base (100) is provided with a connecting frame (110), which is a gantry frame and spans the upper side of the shaping platform (200) on both sides. The servo up and down drive (612) is fixed to the crossbeam of the connecting frame (110).

9. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 7, characterized in that: The servo up / down driver (612) is connected to a displacement sensor and a pressure sensor.

10. A shaping fixture for a battery pack housing without transverse or longitudinal beams according to claim 7, characterized in that: The lower end face of the pressure head (611) is a contoured surface adapted to the housing.

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