A hoisting tool suitable for long-size battery pack

Abstract

The utility model relates to battery technology field, specifically disclose a kind of hoisting tool suitable for long size battery pack, comprising: rectangular body shape's lifting plate, lifting plate in axial direction, multiple first lifting hooks are fixedly installed in two side edges;Multiple second lifting hooks are fixedly installed in the middle of lifting plate, and second lifting hook is evenly distributed along the radial direction of lifting plate;Elastic pull lifting device is hung on the first lifting hook and the second lifting hook, and elastic pull lifting device is used to hook the battery pack with axial length not less than 2000mm. The utility model can be through absorption tolerance, and long size battery pack is hoisted stably and at low cost.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a hoisting fixture suitable for long-sized battery packs. Background Technology

[0002] In the process of power battery system integration and assembly, the battery pack, usually simply referred to as "pack," is a complete and independently usable energy storage unit composed of multiple battery cells connected in series and parallel, along with structural components, a thermal management system, an electrical connection system, a battery management system (BMS), and safety protection devices. It is the core module for energy supply in electric vehicles (EVs), energy storage systems (ESS), power tools, and other electrical equipment.

[0003] Multiple battery pack units are stacked and fixed vertically to form a high-energy-density battery system. For ease of handling, installation, and maintenance, the upper battery pack is often lifted using a hoisting method. However, in actual hoisting operations, unreasonable arrangement of lifting points, design flaws in the lifting equipment, or a shift in the center of gravity can easily lead to uneven stress on the lifting points during hoisting, causing the entire battery pack to tilt or even undergo localized twisting deformation.

[0004] In existing technologies, such as the lifting fixture for a battery pack with a bracket described in patent application CN202220867638.5, a hook, an upper lifting chain, a lifting frame, a lower lifting chain, and a connecting block are included. The connecting block is connected to the bracket. One end of the lower lifting chain is connected to the connecting block, and the other end is connected to the lifting frame. The lower lifting chain is perpendicular to the bracket. One end of the upper lifting chain is connected to the lifting frame, and the other end is connected to the hook. The upper and lower lifting chains are located on the upper and lower sides of the lifting frame, respectively. The hook is positioned higher than the lifting frame, and the center of gravity of the battery pack and the hook are on the same vertical line. This type of bracket not only requires design based on the size of the battery pack but is also only suitable for battery packs with a highly symmetrical cubic structure. Currently, most battery packs are not square but rectangular. Because the center of gravity of rectangular structures of different sizes is different, it is necessary to calculate the center of gravity of the battery pack and the tensile force during lifting based on the weight of multiple battery packs. This is not only cumbersome to calculate but also requires the development of a corresponding bracket based on the size of the battery pack. If the aforementioned existing technologies are used to hoist the battery pack, the upper battery pack is prone to tilting during lifting due to unstable stress. This can lead to localized or bottom-level twisting and deformation, damaging the battery pack. Specifically, when an abnormally positioned upper battery pack is lowered and assembled with a lower battery pack, its bottom surface cannot achieve ideal surface contact with the top surface of the lower battery pack, resulting only in point or line contact. This non-uniform contact causes localized areas to experience pressure far exceeding design values, easily causing damage to the battery pack casing structure, sealing failure, and even internal battery pack deformation under pressure, diaphragm damage, and other safety hazards. This problem is particularly pronounced when battery packs are assembled multiple times within a single production batch, severely impacting the structural integrity, safety, and lifespan of the battery system.

[0005] Meanwhile, other existing technologies also employ other rigid hoisting methods to hoist battery packs. However, due to errors in hoisting methods, such as the installation position of the hook, the length and weight of the rigid hoisting chain, tolerances will occur during the hoisting process. These tolerances will cause the battery pack to tilt during hoisting due to uneven tension, and may even lead to deformation and damage to the battery pack. Utility Model Content

[0006] By absorbing tolerances, this basic solution provides a lifting fixture suitable for long battery packs, enabling stable and low-cost lifting.

[0007] A lifting fixture suitable for long battery packs includes: a rectangular lifting plate with multiple first hooks fixedly installed on both sides along the long side of the bottom of the rectangle; multiple second hooks fixedly installed in the middle of the lifting plate, the second hooks being evenly distributed along the short side of the bottom of the rectangle; and elastic lifting devices hanging on both the first and second hooks, the elastic lifting devices being used to hook battery packs with an axial length of not less than 2000mm.

[0008] Beneficial effects: Through the structural design of the rectangular lifting plate, combined with multiple first hooks on both sides of the axial direction and second hooks evenly distributed radially in the middle, a multi-point lifting layout of "both sides + middle" is formed, which can accurately adapt to long battery packs with an axial length of not less than 2000mm. The hooks on both sides can disperse the lifting tension in the edge area of ​​the battery pack, and the hooks evenly distributed radially in the middle can balance the center of gravity of the long battery pack, avoiding force imbalance caused by the shift of the center of gravity; while the elastic lifting device attached to both the first and second hooks can directly absorb the tolerances caused by the installation position of the hooks and the length of the lifting ropes during the lifting process, effectively solving the problems of easy tilting and local twisting deformation when lifting long rectangular battery packs, ensuring stable lifting posture, and eliminating the need to design special tooling for battery packs of different sizes, thus reducing lifting costs.

[0009] Preferably, the distance between two adjacent first hooks is 750-800mm.

[0010] Beneficial effects: The 750-800mm spacing between two adjacent first hooks, combined with the axial length characteristics of long battery packs, ensures that the first hooks on both sides of the lifting platform are evenly distributed along the axial edge of the battery pack. This avoids both localized stress concentration caused by overly dense lifting points and insufficient force distribution caused by overly sparse lifting points. This spacing ensures that the tension borne by each first hook is relatively balanced, allowing for smooth force transmission along the edges of the battery pack. It reduces shell deformation caused by the large axial span and uneven edge force of long battery packs, while providing a uniform force base for the tolerance absorption of the elastic lifting device, further improving lifting stability.

[0011] Preferably, the distance between two adjacent second hooks is 470-560mm.

[0012] Beneficial effects: The 470-560mm spacing between two adjacent second hooks targets the core stress area in the center of the lifting platform, allowing the second hooks to evenly cover the area near the battery pack's center of gravity along the radial direction of the platform. The center of gravity of long battery packs is often concentrated in the middle; this spacing allows the two second hooks to symmetrically distribute the load in the center of gravity area, balancing the tension difference between the first hooks on both sides and preventing the battery pack from tilting radially due to a shift in the center of gravity. Simultaneously, the uniform spacing allows the lifting force in the middle to be transmitted more smoothly to the lifting platform, reducing the pressure on the battery pack's central casing caused by excessive local tension, and lowering the risk of seal failure and damage to internal cells.

[0013] Preferably, the suspended platform includes a frame structure, which comprises multiple first horizontal beams, multiple first vertical beams, and a first central beam. The multiple first horizontal beams and first vertical beams are fixedly connected end-to-end to form a rectangular frame structure. The first central beam is connected to the first vertical beams at both ends and is located in the middle of the rectangular frame structure, forming the keel of the suspended platform. Preferably, a first hook is fixedly installed on the first vertical beam, and a second hook is fixedly installed on the first central beam.

[0014] Beneficial effects: The suspended platform adopts a rectangular frame structure formed by multiple first horizontal beams and first vertical beams connected end to end, coupled with a first central beam (keel) connecting the first vertical beams in the middle. This ensures the structural rigidity of the suspended platform itself, and the overall load during the hoisting process is distributed through the frame design, preventing deformation of the suspended platform due to the weight of the long battery pack, and thus preventing stress imbalance caused by displacement of the lifting points. The first central beam, acting as the keel, enhances the support strength in the middle of the suspended platform, providing a stable installation foundation for the second hook, ensuring that the tension at the middle lifting point can be effectively transferred to the entire suspended platform frame, avoiding local stress concentration that could damage the suspended platform. At the same time, the frame structure is easy to process and manufacture, adapting to the hoisting span requirements of long battery packs.

[0015] Preferably, the first hooks are symmetrically distributed on the hanging plate.

[0016] Beneficial effects: The symmetrical distribution of the first lifting hook on the lifting plate addresses the axial force requirements of long battery packs, ensuring complete symmetry of the tension at both lifting points and preventing axial tilting caused by uneven tension on one side. The symmetrically distributed first hooks counteract the attitude shift caused by the large axial length and slight differences in load on both sides of the long battery pack, ensuring it remains horizontal during lifting. This provides a guarantee for surface contact when docking with the lower battery pack, avoiding excessive local pressure caused by point or line contact, thus preventing damage to the casing structure and deformation of internal cells under pressure, and improving the structural integrity of the battery system assembly.

[0017] Preferably, the elastic lifting device includes multiple upper lifting ropes, an elastic component, a lower lifting rope, and a third hook; each upper lifting rope corresponds one-to-one with the first hook and the second hook, one end of the upper lifting rope is fixedly connected to the first hook and the second hook respectively, and the other end of the upper lifting rope is fixedly connected to the elastic component; one end of the lower lifting rope is fixedly connected to the elastic component, and the other end of the lower lifting rope is fixedly connected to the third hook, which is used to hook the battery pack.

[0018] Beneficial Effects: The flexible lifting device, through a combination structure of "one-to-one correspondence between the upper lifting rope and the first and second hooks + elastic components + lower lifting rope + third hook," achieves graded transmission and buffered adjustment of lifting force. The one-to-one correspondence of the upper lifting ropes ensures that the force at each lifting point is independently transmitted to the elastic components, avoiding mutual interference between forces at different lifting points. The elastic components can actively absorb tolerances such as hook installation errors and rope length deviations, compensating for force differences through elastic deformation. The lower lifting rope and the third hook are specifically adapted to the lifting points of the battery pack, resulting in a more stable connection and reducing the risk of disengagement. This structure allows the force at each lifting point to be dynamically adjusted through the elastic components, making the force at each lifting point more consistent, avoiding the instantaneous impact force caused by rigid connections, and effectively protecting the shell and internal structure of long-sized battery packs.

[0019] Preferably, the elastic component includes a first disc, a sidewall, a spring, a second disc, and a third disc; the outer surface of the elastic component has a shell structure; one end of the sidewall is fixedly connected to the first disc, and the other end is fixedly connected to the third disc; the spring and the second disc are both located inside the shell; one end of the spring is fixedly connected to the third disc, and the other end abuts against the second disc; the first disc is fixedly connected to the upper suspension rope, and the second disc is fixedly connected to the lower suspension rope.

[0020] Beneficial effects: The elastic component adopts a shell-like structure of "first disc + sidewall + spring + second disc + third disc". The design, with one end of the spring fixed to the third disc and the other end abutting against the second disc, organically combines elastic buffering function with force transmission structure. The shell structure protects the internal spring and discs from external impurities, extending their service life. The spring, as the core elastic component, can dynamically expand and contract according to the tension transmitted by the lower suspension rope, compensating for tension differences at different suspension points in real time. For example, if the tension at a certain suspension point is too high, the spring compression increases; if the tension is too low, the spring extends, ensuring balanced force distribution at each suspension point. The fixed connection between the first disc and the upper suspension rope, and between the second disc and the lower suspension rope, ensures the stability of force transmission, avoids lateral tension caused by force transmission deviation, and further prevents battery pack tilting or twisting deformation.

[0021] Preferably, the first disc has a plurality of first through holes evenly distributed, and the upper suspension rope passes through at least two of the first through holes and is fixedly connected to the first disc; the second disc has a plurality of second through holes evenly distributed, and the lower suspension rope passes through the second through holes and is fixedly connected to the second disc; the lower suspension rope passes out from the middle of the spring; the third disc has a third through hole distributed; the lower suspension rope passes through the third through hole and is fixedly connected to the third hook.

[0022] Beneficial effects: The design of multiple first through holes on the first disc (through at least two for the upper lifting rope), multiple second through holes on the second disc, and the lower lifting rope passing through the middle of the spring and through the third through hole on the third disc improves the reliability of lifting in terms of both connection strength and force transmission accuracy. The upper lifting rope passing through at least two first through holes enhances the connection strength with the first disc, preventing the rope from falling off during lifting. The second through holes on the second disc and the third through holes on the third disc guide the lower lifting rope, ensuring that the tension of the lower lifting rope is transmitted along the centerline of the spring, preventing lateral tension from causing spring tilting or damage. The lower lifting rope passing through the middle of the spring further ensures the coaxiality of force transmission, reduces wear inside the elastic component, and allows for more precise adjustment of the elastic component's extension and contraction, ensuring tolerance absorption and preventing local deformation of the battery pack due to force transmission offset.

[0023] Preferably, an observation through hole is provided on the side wall for observing the extension and contraction state of the spring.

[0024] Beneficial effects: The observation holes on the side walls allow for real-time monitoring of the spring's extension and contraction, providing a direct basis for judging the force during hoisting operations. Through these holes, operators can promptly detect whether the extension and contraction of the springs in each elastic lifting device are consistent, thereby determining whether the force on each lifting point is balanced. If a spring's extension or contraction is abnormal, the position of the lifting point or the battery pack's posture can be adjusted in time, preventing battery pack tilting or deformation caused by undetected uneven force distribution. Simultaneously, the observation holes facilitate post-hoisting maintenance and inspection, allowing for quick assessment of spring fatigue or damage, timely replacement of failed components, ensuring the safety and stability of subsequent hoisting operations, and reducing safety hazards caused by spring failure. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the lifting platform of a lifting fixture suitable for long battery packs, as shown in the embodiment. Figure 2 This is an example of a lifting fixture (excluding a flexible lifting device) suitable for long battery packs, and a front view of the battery pack. Figure 3 A bird's-eye view of a hoisting fixture suitable for long battery packs, as shown in the embodiment. Figure 4 This is a schematic diagram of a hoisting fixture (including a flexible lifting device) suitable for long battery packs, as well as the structure of the battery pack, as an embodiment. Figure 5 A side view of a hoisting fixture (including a flexible lifting device) suitable for long battery packs, as shown in the embodiment; Figure 6 This is a schematic diagram of the structure of an elastic lifting device for a hoisting fixture suitable for long battery packs, as shown in the embodiment. Figure 7This is a cross-sectional view of an elastic lifting device for a lifting fixture suitable for long battery packs, as described in an embodiment. Figure 8 This is a schematic diagram of the internal structure of an elastic lifting device for a hoisting fixture suitable for long battery packs, as described in an embodiment. Detailed Implementation

[0026] The reference numerals in the accompanying drawings include: Battery pack 1, hanging plate 2, first hook 3, second hook 4, elastic lifting device 5, first vertical beam 21, first horizontal beam 22, first middle beam 23, upper lifting rope 51, elastic component 52, lower lifting rope 53, third hook 54, observation through hole 521, first disc 522, side wall 523, spring 524, second disc 525, third disc 526, first through hole 5221, second through hole 5251.

[0027] Example like Figure 1 As shown, this embodiment provides a lifting fixture suitable for long battery packs, used for lifting such... Figure 2 The battery pack shown has an axial length of c. Where c is not less than 2000 mm. (Combined with...) Figure 3 As shown in the xy two-dimensional coordinate system, a lifting fixture suitable for long battery packs includes a rectangular lifting plate. The plate has an axial direction along the x-axis and a radial direction along the y-axis. Along the axial direction, five first hooks are welded to each of the two edges of the lifting plate, for a total of ten first hooks. Along the radial direction, two second hooks are fixedly installed in the middle of the lifting plate. The first and second hooks have the same shape and structure. The distance between two adjacent first hooks is 'a', which is not less than 745 mm and not more than 755 mm. The distance between two adjacent second hooks is 'b', which is not less than 555 mm and not more than 565 mm.

[0028] Specifically, such as Figure 3 The suspended platform includes two first horizontal beams, two first vertical beams, and a first central beam. The first horizontal beams and first vertical beams are fixedly connected end to end to form a rectangular frame structure. The first central beam is connected to the first vertical beams at both ends and is located in the middle of the rectangular frame structure, forming the keel of the suspended platform. Four first hooks are welded to the first vertical beams, and two second hooks are welded to the first central beam.

[0029] like Figure 4 and Figure 5As shown, a lifting fixture suitable for long battery packs also includes a flexible lifting device. This device is used to horizontally lift the battery pack, which is generally parallel to the workbench during lifting. The flexible lifting device includes multiple upper lifting ropes 51, an elastic component 52, multiple lower lifting ropes 53, and a third hook 54. The total number of the first hook and the second hook is equal to the number of upper lifting ropes. Each upper lifting rope corresponds one-to-one with the first hook and the second hook, with its top fixedly connected to both hooks and the elastic component at its bottom.

[0030] Specifically, such as Figure 6 and Figure 7 As shown, the elastic component includes a first disc 522, a sidewall 523, a spring 524, a second disc 525, and a third disc 526. The outer surface of the elastic component is a cylindrical shell structure, which is hollow inside. The first disc 522, the sidewall 523, and the third disc form the cylindrical shell structure. The first disc is fixedly connected to the top of the sidewall, and the third disc is fixedly connected to its bottom. The spring is located at the upper end of the third disc and inside the cylindrical shell. The bottom end of the spring is fixedly connected to the third disc, and the top end abuts against the second disc, which is located inside the cylindrical shell and below the third disc. The second disc is fixedly connected to a lower suspension rope, which passes through the middle of the spring.

[0031] Specifically, such as Figure 8 As shown, the first disc has multiple uniformly spaced first through holes. The bottom end of the upper suspension rope passes through at least two of the first through holes and is fixedly connected to the first disc. The second disc has multiple uniformly spaced second through holes. The lower suspension rope passes through the second through holes and is fixedly connected to the second disc, and the lower suspension rope exits from the middle of the spring. The third disc has a third through hole, through which the lower suspension rope passes, and its bottom end is fixedly connected to a third hook, which is used to lift the battery pack. It should be noted that the area of ​​the upper surface of the third disc is larger than the cross-sectional area of ​​the sidewall, so that the spring can be fixedly installed on the top of the third disc. In this embodiment, the centerline of the spring passes through the second and third through holes. The cross-sectional area of ​​the second disc is smaller than the cross-sectional area of ​​the sidewall, so that the second disc can be placed inside the cylindrical shell structure and the spring can be compressed downward by the pull of the lower suspension rope.

[0032] An observation hole is provided on the side wall to observe the extension and contraction state of the spring.

[0033] In summary, firstly, the spring buffer structure of the elastic lifting device—one end of the spring in the elastic component is fixed to the third disc, and the other end abuts against the second disc. When the tension at a certain lifting point is too large due to tolerance, the spring compression increases; when the tension is too small, the spring extends appropriately. Through dynamic expansion and contraction, the tension difference between each lifting point is compensated in real time, transforming "rigid stress transmission" into "flexible dynamic adjustment," completely absorbing the stress unevenness caused by tolerance, and solving the contradiction of "many lifting points → uneven stress."

[0034] Second, it supplements the functions of "tolerance absorption" and "condition monitoring" - existing technologies only have the single function of "lifting and transferring". The embodiment supplements the function of "tolerance absorption" through elastic components and the function of "condition monitoring" through observation through holes, so that the technical system evolves from "single function" to "multi-functional". This evolution not only solves the pain points of existing technologies, but also promotes the upgrade of long-size battery pack lifting technology from "extensive" to "precise", which has significant creativity.

[0035] The usage principle of this embodiment The battery pack is placed horizontally on the workbench. Each upper lifting rope is sequentially attached to the first and second hooks, securing them to their respective positions. Each lower lifting rope is sequentially attached to the third hook, which is then hooked onto the corresponding lifting point on the upper surface of the battery pack. The lifting platform moves upward slowly. Just as the upper and lower lifting ropes become taut, the battery pack is still on the workbench. At this point, the platform moves upward, with the upper lifting ropes experiencing upward tension from the first and second hooks, and the second disc experiencing downward tension from the lower lifting ropes. The second disc continuously compresses the spring until the forces between the upper and lower lifting ropes cancel each other out. Furthermore, the weight of the battery pack and the tension of the third hook cancel each other out, and the spring's elasticity absorbs any tolerances in the battery pack during lifting, preventing localized deformation. After leaving the workbench, the battery pack forms a single unit with a lifting fixture suitable for long battery packs, and the battery pack is horizontal relative to the workbench.

[0036] Beneficial effects of this embodiment First, the structure of the hanging platform and the layout of the hooks are scientifically and rationally designed to ensure balanced stress on long battery packs and avoid deformation at the edges and center of gravity. In this embodiment, the hanging platform adopts a structural design of "a rectangular frame with two first horizontal beams + two first vertical beams connected end to end + a central first beam (keel)". The first central beam directly connects to the first vertical beams on both sides, forming a support structure similar to a "spine". This design can improve the load-bearing strength of the hanging platform itself, and can stably bear the weight of long battery packs with an axial length of ≥2000mm. This prevents the hanging platform from bending and deforming due to large span and heavy load, and thus prevents stress imbalance caused by displacement of the lifting points. Meanwhile, the hook layout is precisely matched to the stress requirements of the long battery pack: five first hooks are welded on each of the two first vertical beams (a total of 10), with the adjacent spacing controlled at 745-755mm. This spacing just covers the weak stress area of ​​the axial edge of the battery pack, which can evenly distribute the edge tension to 10 lifting points and avoid excessive tension at a single lifting point causing the edge shell of the battery pack to dent; two second hooks are welded on the first central beam in the middle, with an adjacent spacing of 555-565mm. This can be precisely aligned with the center of gravity area of ​​the long battery pack, balance the tension difference between the first hooks on both sides, and completely solve the problem of radial tilting of the battery pack caused by the center of gravity shift, laying the foundation for the stability of the subsequent lifting posture.

[0037] Secondly, the flexible sling device dynamically absorbs tolerances and avoids damage to the battery pack from rigid impacts. In this embodiment, the flexible sling device features a structure of "one-to-one correspondence between the upper sling and the hook + cylindrical shell elastic component + lower sling guide," achieving both tolerance absorption and tensile force buffering. On the one hand, 12 lifting ropes (corresponding to 10 first hooks + 2 second hooks) are fixed to the hooks one by one, ensuring that the tension of each lifting point is independently transmitted to the elastic component, and the tension fluctuation of one lifting point will not interfere with other lifting points, thus avoiding "local overload". On the other hand, the spring design inside the elastic component is highly targeted - the bottom of the spring is fixed to the third disc, and the top abuts against the second disc connected to the second hook. When the lifting plate is lifted, if the tension of a certain lifting point is too large due to the installation error of the hook or the deviation of the lifting rope length, the spring will increase the compression accordingly to compensate for the tension difference through elastic deformation. If the tension is too small, the spring will extend appropriately to dynamically adjust the force of each lifting point to a balanced state, completely absorbing the tolerance during the lifting process and avoiding damage to the battery pack's internal cell separator by the instantaneous impact force brought by the rigid connection. In addition, the lower suspension rope passes through the middle of the spring and is guided by the second through hole of the second disc and the third through hole of the third disc to ensure that the tension is transmitted along the center line of the spring, preventing the spring from tilting or the battery pack from shifting due to lateral tension, and further protecting the structural integrity of the battery pack.

[0038] Meanwhile, ease of operation and maintenance: real-time monitoring of hoisting status reduces mass production costs. The embodiment utilizes an "observation through-hole" design on the sidewall of the elastic component, providing an intuitive means of monitoring the hoisting operation. Operators can observe the spring's extension and contraction status in real time through these holes. If the spring compression of a particular elastic component is significantly greater than others (or if the extension is abnormal), hoisting can be immediately paused, and the hoisting point position or battery pack posture adjusted. This proactively avoids the risk of tilting or deformation caused by uneven force distribution, eliminating the need to visually assess the posture after the battery pack is hoisted, thus improving operational safety and efficiency. Furthermore, the entire fixture eliminates the need for "designing dedicated brackets for different battery pack sizes" as required by existing technologies. Thanks to the tolerance absorption capacity of the elastic component, this fixture can accommodate all long rectangular battery packs with an axial length ≥2000mm without additional custom processing, significantly reducing the design and manufacturing costs of the fixture. It is particularly suitable for the hoisting needs of multiple batches of long battery packs of different specifications in mass production, balancing practicality and economy.

[0039] Finally, the assembly docking guarantee ensures the battery pack is horizontally docked, avoiding excessive local pressure. The embodiment employs a combined design of "multi-point balanced force distribution + elastic tolerance absorption," ensuring that the long battery pack remains horizontally parallel to the workbench after lifting. The symmetrically distributed first hooks on both sides offset axial tension deviations, the second hook in the middle balances the radial center of gravity, and the elastic components compensate for tension differences caused by all tolerances. Ultimately, when the battery pack is lowered to dock with the lower battery pack, the bottom surface achieves ideal "surface contact" with the top surface of the lower battery pack, rather than the point or line contact found in existing technologies. This surface contact state controls the contact pressure within the design range, preventing damage to the casing structure and sealing failure in localized areas due to excessive pressure. It even eliminates the safety hazards of internal cell deformation and diaphragm damage caused by pressure, significantly improving the structural integrity and service life of the battery system after assembly. In particular, it addresses the industry pain point of "problems easily occurring during multiple dockings" when assembling battery packs in batches.

[0040] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. 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.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 based on the specific circumstances.

[0042] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0043] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0044] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A lifting fixture suitable for long battery packs, characterized in that, include: The suspended platform is rectangular in shape. Multiple first hooks are fixedly installed on both sides of the platform in the axial direction. Multiple second hooks are fixedly installed in the middle of the platform, and the second hooks are evenly distributed along the radial direction of the platform. Both the first and second hooks are equipped with elastic lifting devices, which are used to hook battery packs with an axial length of not less than 2000 mm.

2. The hoisting fixture suitable for long battery packs according to claim 1, characterized in that, The distance between two adjacent first hooks is 750-800mm.

3. The hoisting fixture suitable for long battery packs according to claim 1, characterized in that, The distance between two adjacent second hooks is 470-560mm.

4. The hoisting fixture suitable for long battery packs according to claim 1, characterized in that, The suspended platform includes a frame structure, which includes multiple first horizontal beams, multiple first vertical beams, and a first central beam. Multiple first horizontal beams and first vertical beams are fixedly connected end to end to form a rectangular frame structure; the first middle beam is connected to the first vertical beam at both ends and is located in the middle of the rectangular frame structure to form the keel of the hanging board.

5. A hoisting fixture suitable for long battery packs according to claim 4, characterized in that, The first hook is fixedly installed on the first vertical beam, and the second hook is fixedly installed on the first middle beam.

6. A hoisting fixture suitable for long battery packs according to claim 1, characterized in that, The first hooks are symmetrically distributed on the hanging plate.

7. A hoisting fixture suitable for long battery packs according to claim 1, characterized in that, The flexible lifting device includes multiple upper lifting ropes, an elastic component, a lower lifting rope, and a third lifting hook; Each hoisting rope corresponds to the first hook and the second hook respectively. One end of the hoisting rope is fixedly connected to the first hook and the second hook respectively, and the other end of the hoisting rope is fixedly connected to the elastic component. One end of the lower suspension rope is fixedly connected to the elastic component, and the other end of the lower suspension rope is fixedly connected to the third hook, which is used to hook the battery pack.

8. A hoisting fixture suitable for long battery packs according to claim 7, characterized in that, The elastic component includes a first disk, a sidewall, a spring, a second disk, and a third disk; The outer surface of the elastic component is a shell structure; a first disk is fixedly connected to one end of the side wall, and a third disk is fixedly connected to the other end; the spring and the second disk are both located inside the shell. One end of the spring is fixedly connected to the third disc, and the other end abuts against the second disc; the first disc is fixedly connected to the upper suspension rope, and the second disc is fixedly connected to the lower suspension rope.

9. A hoisting fixture suitable for long battery packs according to claim 8, characterized in that, The first disc has multiple first through holes evenly spaced, and the hanging rope passes through at least two of the first through holes and is fixedly connected to the first disc. The second disc has multiple second through holes evenly spaced. The lower suspension rope passes through the second through holes and is fixedly connected to the second disc. The lower suspension rope exits from the middle of the spring. The third disc has a third through hole. The lower suspension rope passes through the third through hole and is fixedly connected to the third hook.

10. A hoisting fixture suitable for long-sized battery packs according to claim 8, characterized in that, An observation hole is provided on the side wall for observing the extension and contraction of the spring.

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