Clamping device for thermal runaway experiment of multi-specification battery packs

Abstract

The utility model belongs to the field of experimental equipment, and particularly relates to a clamping device for a thermal runaway experiment of a multi-specification battery pack. The clamping device comprises a carrying table, a clamping jaw, a supporting frame and a fastener. The carrying table comprises a table plate and supporting legs below the table plate. A through hole is formed in the center of the platen, and a plurality of strip-shaped holes are further formed in the platen. And the extension directions of the strip-shaped holes are radially distributed on the table board by taking the through hole as the center. The clamping jaws are perpendicular to the platen and movably connected to the four strip-shaped holes in the platen. And a limiting part is arranged at the top of each clamping jaw. The supporting frame comprises a disc face and a threaded rod, the disc face is arranged above the platen in parallel, and one end of the threaded rod is fixedly connected with the disc face. And the other end downwards penetrates through the bedplate along the through hole. The fastener is provided with an inner screw hole and can be screwed on the threaded rod, and then the height of the disc face in the supporting frame is adjusted. The utility model solves the problems that the existing device cannot adapt to battery packs with different specifications, and the normal experiment is influenced due to the nonstandard constraint mode.

Description

Technical Field

[0001] The utility model belongs to the field of experimental equipment, and particularly relates to a clamping device for thermal runaway experiments of battery packs with multiple specifications. Background Technique

[0002] With the continuous development of new energy vehicles and the increasing demand for energy storage in distributed power stations such as photovoltaic power stations, the production and sales volume of battery packs represented by lithium batteries are also growing rapidly; this has also promoted the research on battery safety technology. For lithium batteries, studying their thermal runaway under extreme conditions is of great significance for improving battery safety. Conventional battery thermal runaway experiments refer to making the battery undergo thermal runaway through external conditions such as pressurization, circuit, puncture, and overheating, and detecting various characteristic parameters of the battery during thermal runaway through sensors. When the battery undergoes thermal runaway, there is a risk of deflagration or even explosion, so the thermal runaway experiment needs to be carried out in a safe and controllable environment.

[0003] In order to reduce the safety risk during the battery thermal runaway experiment, technicians usually fix the tested battery pack on a specific clamping device and conduct the experiment in an independent space isolated from the testers. However, due to the diverse models and specifications of lithium batteries, the prior art lacks a general clamping device that can effectively adapt to different types of lithium batteries. Most of the existing clamping devices adopt flat plate-type jigs, and when applied to different lithium batteries, there are problems such as poor battery fixing effect and non-standard constraint methods. In the thermal runaway experiment, if the battery cannot be well constrained, it will lead to serious safety risks. In addition, the flat plate jig restricts the normal progress of the battery thermal runaway experiment and also affects the installation and normal operation of various sensors. When conducting destructive experiments, the battery constraint method will even affect the accuracy of the experimental data, and in severe cases, it may even lead to the inability to collect experimental data normally. Summary of the Utility Model

[0004] In order to solve the problems that the clamping device in the prior art cannot adapt to battery packs with different specifications and the non-standard constraint method affects the normal experiment, the utility model provides a clamping device for thermal runaway experiments of battery packs with multiple specifications.

[0005] The technical solution provided by the utility model is as follows: A clamping device for thermal runaway experiments of battery packs with multiple specifications, which includes a carrier table, a plurality of claws, a support frame, and a fastener.

[0006] Among them, the carrier platform includes a horizontally arranged platen and supporting legs below. The center of the platen includes a through hole, and the platen is also provided with a plurality of strip holes. The extending directions of the strip holes are radially distributed on the tabletop with the through hole as the center. Each rod-shaped claw is perpendicular to the platen and is movably connected to four strip holes in the platen, and can slide horizontally along the extending direction of the strip holes. A limiting portion horizontally extending toward the center side is further provided at the top of each claw.

[0007] The support frame includes a disk surface and a threaded rod. The disk surface is arranged parallel above the platen. One end of the threaded rod is perpendicularly and fixedly connected to the center of the disk surface; the other end extends downward through the platen along the through hole. The size of the fastener is larger than the diameter of the through hole; the fastener has an internal threaded hole and can be screwed onto the threaded rod; the fastener is used to adjust the relative height between the disk surface in the support frame and the carrier platform.

[0008] As a further improvement of the present utility model, the platen is made of a single-layer board or a multi-layer board.

[0009] And / or

[0010] The number of strip holes in the platen is four, and each strip hole is centered on the through hole on the platen and is distributed on the diagonal of a rectangle. The number of claws is also four.

[0011] As a further improvement of the present utility model, each claw includes a base and a rod body; the cross-section of the base is in an "I" shape, and the smaller-sized part in the middle of the base is clamped in the strip hole, thereby allowing the claw to move horizontally relative to the platen along the extending direction of the strip hole.

[0012] And / or

[0013] The base is also provided with a threaded hole perpendicular to the platen, and the claw and the carrier platform are fixed through a bolt along the threaded hole.

[0014] As a further improvement of the present utility model, the rod body part of the claw is of an integral structure and is formed by pairwise perpendicular splicing of three angle-iron-shaped rods; the angle-iron-shaped structures of the rods in each claw installed on the same carrier platform are bent inward at 90°.

[0015] As a further improvement of the present utility model, the strip holes in the platen are through holes or blind holes.

[0016] When the strip holes are blind holes, the platen is also provided with a plurality of cavities located below each strip hole. The width of the cavity matches the larger-sized part in the base of the claw, and the width of the cavity is greater than the width of the strip hole.

[0017] As a further improvement of the present utility model, the number of fasteners is at least one, and one of the fasteners is located above the tabletop and is used to limit the combined body of the fastener and the support frame from moving downward relative to the carrier platform.

[0018] As a further improvement of the present utility model, the support frame adopts an integral structure; wherein, the disk surface adopts a frame structure, including an external annular frame, an internal center plate, and a plurality of connecting rods connecting the annular frame and the center plate.

[0019] As a further improvement of the present utility model, the clamping device for the thermal runaway experiment of multi-specification battery packs further includes a lifting mechanism, and the lifting mechanism is used to drive the support frame to move up and down in the vertical direction.

[0020] As a further improvement of the present utility model, the lifting mechanism adopts a hydraulic cylinder or an electric cylinder.

[0021] And / or

[0022] The lifting mechanism is installed under the table board.

[0023] And / or

[0024] The ejector rod in the lifting mechanism is fixedly connected or abutted against the threaded rod of the support frame.

[0025] As a further improvement of the present utility model, the carrier table, the clamping jaws, the support frame and the fasteners are structural parts made of heat-resistant steel plates.

[0026] The carrier table further includes a protective skirt board, and the protective skirt board surrounds the outer periphery of the lower space of the table board.

[0027] The clamping device for the thermal runaway experiment of multi-specification battery packs provided by the present utility model has the following beneficial effects:

[0028] The clamping jaws in the clamping device provided by the present utility model are annularly distributed on the carrier table and can move upward along a specific direction to realize the "expansion" and "contraction" of the clamping jaws; therefore, the clamping device can be applicable to clamping lithium batteries with different shapes, different sizes and different thicknesses. It overcomes the disadvantage that the existing fixtures can only be applicable to single-size or single-type batteries.

[0029] The clamping device of the present utility model is integrally in a frame structure and clamps the battery pack by means of corner fixing, so that the shielding of the battery pack can be reduced, and most of the surfaces of the battery pack are exposed. On the one hand, this can avoid interfering with the thermal runaway process of the battery, and on the other hand, it can also avoid affecting the installation and application of various sensors and actuators during the test process.

[0030] The clamping device of the present utility model fixes the battery pack in a "clamping" manner. Compared with the conventional flat fixture, it can restrict the displacement of the battery in all directions in the fixed state, and the clamping effect is more firm. Furthermore, the safety of the battery thermal runaway test process can be improved. Description of the Drawings

[0031] The accompanying drawings are used to provide a further understanding of the present utility model and form a part of the description. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the accompanying drawings:

[0032] Figure 1 It is a schematic structural diagram of a clamping device for a multi-specification battery pack thermal runaway experiment provided in Embodiment 1 of the present utility model.

[0033] Figure 2 It is an exploded view of the structure of the clamping device for a multi-specification battery pack thermal runaway experiment in Embodiment 1 of the present utility model.

[0034] Figure 3 It is a state diagram of the clamping device for a multi-specification battery pack thermal runaway experiment restraining the battery pack.

[0035] Figure 4 It is a schematic structural diagram of the claw in Embodiment 1 of the present utility model.

[0036] Figure 5 It is an assembly drawing of a platen with through holes and blind holes respectively and the base of the claw.

[0037] Figure 6 It is a schematic structural diagram of the support frame in Embodiment 1 of the present utility model.

[0038] Figure 7 It is a schematic structural diagram of a clamping device for a multi-specification battery pack thermal runaway experiment including a lifting assembly in Embodiment 2 of the present utility model.

[0039] Figure 8 It is a schematic structural diagram of a clamping device for a multi-specification battery pack thermal runaway experiment including a protective skirt in Embodiment 2 of the present utility model.

[0040] The labels in the figure are: 1, carrier table; 2, claw; 3, support frame; 4, fastener; 5, lifting assembly; 6, protective skirt; 11, platen; 12, support leg; 21, rod body; 22, base; 31, disk surface; 32, threaded rod; 100, battery pack; 111, through hole; 112, strip hole; 210, limiting part. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0042] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish different objects described, and cannot be understood as indicating or implying relative importance.

[0043] Embodiment 1

[0044] A clamping device for a thermal runaway experiment of a multi-specification battery pack in this embodiment is as Figure 1 and Figure 2 shown, which includes a carrier 1, a plurality of rod-shaped claws 2, a support frame 3, and at least one fastener 4.

[0045] Among them, the carrier 1 includes a horizontally arranged table board 11 and support legs 12 below. In this embodiment, the shape and specifications of the table board 11 are not limited. Correspondingly, the number, installation position, and size of the support legs 12 in the carrier 1 of this embodiment are also not limited. In actual products, considering that the battery pack 100 to be tested is usually square, the tabletop of the carrier 1 in the typical scheme illustrated in this embodiment is also square. And the overall specifications of the table board 11 can be adapted to the maximum specifications of the battery pack 100 to be tested.

[0046] Specifically, as can be seen from Figure 2 , the center of the table board 11 in this embodiment includes a through hole 111, and the table board 11 is also provided with a plurality of strip holes 112. The extending directions of the respective strip holes 112 are radially distributed on the tabletop with the through hole 111 as the center. Each claw 2 is perpendicular to the table board 11 and is movably connected to four strip holes 112 in the table board 11, and can horizontally slide along the extending direction of the strip holes 112. A limiting portion 210 extending horizontally toward the center is also provided at the top of each claw 2.

[0047] The support frame 3 includes a disk surface 31 and a threaded rod 32. The disk surface 31 is arranged parallel to the table board 11 above, and one end of the threaded rod 32 is vertically and fixedly connected to the center of the disk surface 31; the other end extends downward through the table board 11 along the through hole 111. The size of the fastener 4 is larger than the diameter of the through hole 111; the fastener 4 has an internal threaded hole and can be screwed onto the threaded rod 32; the fastener 4 is used to adjust the relative height between the disk surface 31 in the support frame 3 and the carrier 1.

[0048] The following is combined with as Figure 3The operation method of the clamping device provided in this embodiment in the process of fixing and removing the lithium battery pack is described in detail to more clearly demonstrate the working principle of the clamping device and its advantages over the existing clamping devices:

[0049] 1. Fixing of lithium battery pack

[0050] First, screw the fastener 4 on the threaded rod 32 in the support frame 3 to one end of the disk surface 31 close to the top, so that the support frame 3 is lowered to a position close to the table 11; and slide each claw 2 outward along the strip hole 112 to the limit position. Then, place the battery pack 100 to be tested in the middle of each claw 2 and on the disk surface 31 of the support frame 3. Next, push each claw 2 inward along its own strip hole 112 to a position close to the side edge of the battery pack 100. At this time, the rod 21 of each claw 2 can limit the horizontal displacement of the battery pack 100 along the circumference of the battery pack 100. Then, lift the support frame 3 as a whole, so that the battery pack 100 is clamped between the limit portion 210 at the top of the claw 2 and the disk surface 31 of the support frame 3. Finally, screw the fastener 4 so that it moves along the threaded rod 32 to one end away from the disk surface 31, and presses against the upper surface of the table 11, thereby limiting the displacement of the battery pack 100 in the vertical direction. In addition, the clamping device for thermal runaway test of multi-specification battery packs of this embodiment can further screw the fastener 4 to adjust the clamping force of the claw 2 and the support frame 3 on the battery pack 100 after completing the limiting of the battery pack 100.

[0051] 1. Disassembly of lithium battery pack

[0052] When it is necessary to remove the tested battery pack 100 from the clamping device, the technician first screws the fastener 4 on the threaded rod 32 to move it to the side close to the disk 31 of the support frame 3, thereby lowering the vertical height of the support frame 3 relative to the carrier 1. At this time, the clamping force of the claws 2 and the support frame 3 on the battery pack 100 in the vertical direction is released. Then, each claw 2 is pulled outward along the bar hole 112, and the limiting effect of each claw 2 and the battery pack 100 in the horizontal direction is also contacted accordingly. At this point, the technician can take the battery pack 100 out of the clamping device.

[0053] Combining the above, it can be found that: each claw 2 in the clamping device of this embodiment can move along a specific direction on the carrier 1, thereby realizing the "expansion" and "contraction" of the claw 2; the support frame 3 can move up and down in the vertical direction to tighten the battery pack 100. Through this adjustment method, the clamping device provided by the utility model can be used to tighten lithium batteries of different shapes, sizes and thicknesses. Therefore, the clamping device provided by this embodiment can overcome the disadvantage that the existing clamp can only be used for batteries of a single size or a single type.

[0054] Further analysis of the clamping method of the clamping device on the battery pack 100 in this embodiment reveals that the corner - fixing method is adopted in this embodiment. Therefore, the shielding of the battery pack 100 can be minimized, and most of the surfaces of the battery pack 100 are exposed. On the one hand, this can avoid interfering with the battery thermal runaway process, and on the other hand, it can also avoid affecting the installation and application of various sensors and actuators during the testing process. In addition, the clamping device in this embodiment can restrict the displacement of the battery in all directions in the fixed state, and the clamping effect is more firm. Thus, the safety of the battery thermal runaway test process can be improved.

[0055] In the typical solution shown in this embodiment of Figures 1 - 3 the present invention, for a square - box - shaped battery pack, the number of the strip - shaped holes 112 in the platen 11 of this embodiment is four, and each strip - shaped hole 112 is centered on the through - hole 111 on the platen 11 and distributed on the diagonal of a rectangle. The number of the jaws 2 is also four. And the rod body 21 part of the jaw 2 is spliced by three angle - iron - shaped rods in a pairwise - perpendicular manner; the angle - iron - shaped structures of each segment of the rods in each jaw 2 installed on the same carrier 1 are bent inward at 90°.

[0056] With the jaws 2 of this special structure, the battery pack can be clamped along the four vertices and four side edges of the square - box - shaped battery pack. The jaws 2 have better wrapping property and better fastening effect.

[0057] Of course, in order to deal with other non - square - box - shaped battery packs, such as cylindrical and special - shaped battery packs, etc. In other embodiments, the number of the strip - shaped holes 112 on the carrier 1 and the installed jaws 2 can also be three, five, six, …, etc., and each jaw 2 is arranged on the carrier 1 in a structure layout such as an equilateral triangle, a regular pentagon, a regular hexagon, etc. Correspondingly. Each segment of the rod in the jaw 2 can also adopt an arc - shaped bend or a bend structure at other angles. Of course, in the simplest structure, the carrier 1 can only install two jaws 2, and the two jaws 2 are arranged mirror - symmetrically on the carrier 1.

[0058] In addition, in this embodiment, in order to ensure the structural strength and weather resistance of the jaw 2, the rod body 21 part or the whole jaw 2 of the jaw 2 should adopt an integrally - formed structure.

[0059] In order to realize the movable connection between the jaw 2 and the platen 11 and only allow the jaw 2 to slide in the horizontal direction. In this embodiment, the jaw 2 is designed to include two parts: a base 22 and a rod body 21. Among them, as Figure 4As shown, the cross-section of the base 22 is in the shape of a "work" character. In this state, the smaller-sized part in the middle of the base 22 can just be clamped in the strip-shaped hole 112. In this structure, the outer diameter of the smaller-sized part of the base 22 matches the width of the strip-shaped hole 112, and the height of the smaller-sized part of the base 22 matches the thickness of the platen 11. After adopting this structure, the claw 2 is only allowed to move horizontally relative to the platen 11 along the extending direction of the strip-shaped hole 112.

[0060] It should be specifically noted that: in this embodiment, the strip-shaped holes 112 on the carrier 1 are radially distributed, so it can naturally limit the horizontal movement of the battery pack 100 clamped by the "contracted" claw 2. And because the battery pack 100 has a relatively large self-weight, the battery pack 100 can apply pressure to the base 22, so that each claw 2 can also be tightly pressed on the platen 11 after the battery pack 100 is clamped, inhibiting the horizontal movement of each claw 2 and preventing self-reverse expansion after "contraction" and resulting in loosening; that is, the claw 2 in this embodiment has a self-locking effect when fixed.

[0061] In other further optimized solutions of this embodiment, screw holes perpendicular to the platen 11 can also be provided in the base 22, and the claw 2 and the carrier 1 are fixed along the screw holes by bolts. For example, during the battery fixing stage, when the technician adjusts the distances of each claw 2 and "holds" the battery pack 100, the technician can screw the bolts into the base 22, and then fix the claw 2 on the carrier 1.

[0062] In the solution of this embodiment, the strip-shaped holes 112 in the platen 11 can be through holes 111 or blind holes. As Figure 5 shown, when the strip-shaped hole 112 is a through hole 111, the two larger-sized parts of the "work" character structure in the base 22 of the claw 2 should be respectively clamped on the upper surface and the lower surface of the platen 11. And when the strip-shaped hole 112 is a blind hole, the platen 11 is also provided with a plurality of cavities located below each strip-shaped hole 112. The width of the cavity matches the larger-sized part of the base 22 of the claw 2, and the width of the cavity is greater than the width of the strip-shaped hole 112. One of the two larger-sized parts of the "work" character structure in the base 22 of the claw 2 is located on the upper surface of the platen 11, and the other is located in the cavity.

[0063] In actual product processing, when the strip-shaped hole 112 in the platen 11 is a through hole 111, the platen 11 should adopt a single-layer board. When the strip-shaped hole 112 in the platen 11 is a blind hole, it is neither convenient for processing nor for embedding the base 22 of the claw 2 into the blind hole. At this time, in this embodiment, the platen 11 is designed as a double-layer board. The strip-shaped hole 112 is provided in the upper layer board of the platen 11, and a pit is provided in the lower layer board at the corresponding position. During assembly, the claw 2 can be assembled into the upper layer board first, and then the upper layer board and the lower layer board are joined and welded together to form the required blind hole and cavity structures.

[0064] In this embodiment, the fastener generally adopts a nut. In the foregoing solution, the number of the fasteners 4 is only one, and the fastener 4 is located above the table surface and is used to limit the combined body of the fastener 4 and the support frame 3 from moving downward relative to the carrier 1. In other more optimized solutions, the fasteners 4 can also be multiple to improve the structural stability. For example, two fasteners 4 are adopted, one is located above the platen 11 and the other is located below the platen 11. When fixing the battery pack 100, the two fasteners 4 clamp the platen 11 along the upper and lower sides. Or both of the two fasteners are arranged above the platen 11, and the self-locking effect of the double nuts is used to prevent the nuts from loosening during the experiment. Technicians can further increase the number of nuts.

[0065] In a more optimized solution of this embodiment, such as Figure 6 shown, the support frame 3 adopts an integral structure; wherein, the disk surface 31 adopts a frame structure, including an external annular frame, an internal central plate, and multiple connecting rods connecting the annular frame and the central plate. The support frame 3 with a frame structure can, on the one hand, reduce the shielding area during the clamping process of the battery pack 100, and on the other hand, can achieve lightweight, and is convenient for holding and adjusting the height.

[0066] Embodiment 2

[0067] On the basis of the solution of Embodiment 1, this embodiment further provides a clamping device for multi-specification battery pack thermal runaway experiments with better performance. Compared with the solution of Embodiment 1, the improvement of the solution of this embodiment lies in:

[0068] Such as Figure 7As shown, the clamping device for the multi-specification battery pack thermal runaway experiment further includes a lifting mechanism 5, and the lifting mechanism 5 is used to drive the support frame 3 to move up and down in the vertical direction. In practical applications, the elevator can be configured with a hydraulic cylinder or an electric cylinder. The lifting mechanism 5 in this embodiment can lift or lower the support frame 3 and the battery pack 100 thereon instead of manual labor when the battery pack 100 is fixed or disassembled. This reduces the workload of technicians. In addition, by supporting the support frame 3 through the lifting structure, it can also bear the main load above, reducing the load borne by the nut and the threaded rod 32. To prevent the entire device from being overloaded and causing the threaded rod 32 and the nut to slip or deform when the battery pack 100 on the clamping device is too heavy.

[0069] It should be specifically noted that: the lifting mechanism 5 of this embodiment can be installed above the table board 11 and abuts against the lower surface of the disk surface 31. In a more optimized solution, the lifting mechanism 5 should be installed below the table board 11, and the ejector rod in the lifting mechanism 5 is fixedly connected or abutted against the bottom end of the threaded rod 32 of the support frame 3. In this embodiment, the lifting mechanism 5 is preferably installed below the table surface to prevent damage to the electric cylinder or hydraulic cylinder in the lifting mechanism 5 when the battery pack 100 burns or explodes during the thermal runaway experiment. When the lifting mechanism 5 is installed below the table board 11, the table board 11 can absorb the heat effect and / or shock wave generated when the upper battery pack undergoes thermal runaway, thereby playing a protective role for the lifting mechanism 5.

[0070] Based on the same requirements for shock resistance, heat resistance, etc., the carrier 1, the clamping jaws 2, the support frame 3, and the fasteners 4 of this embodiment are all structural parts made of heat-resistant steel plates. In addition, as Figure 8 shown, the carrier 1 further includes a protective skirt 6, and the protective skirt 6 surrounds the outer periphery of the lower space of the table board 11, thereby further preventing damage to the mechanism below the table board 11 during the battery pack thermal runaway experiment. In this structure, in addition to the lifting mechanism 5, other instruments and meters that do not need to be in direct contact with the battery pack 100 and are related to the test can also be installed in the safe space isolated by the protective skirt 6 below the table board 11.

[0071] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features do not conflict, they should all be considered to be within the scope described in this specification.

[0072] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the appended claims.

Claims

1. A clamping device for thermal runaway test of multi-specification battery packs, characterized in that: It includes: The platform comprises a horizontally arranged platform and supporting legs below; the platform comprises a through hole in the center, and a plurality of strip holes are also arranged in the platform; the extension direction of each of the strip holes is radially distributed on the platform with the through hole as the center; A plurality of rod-shaped claws are perpendicular to the table and movably connected to each strip hole in the table, and each claw can slide horizontally along the extension direction of the strip hole; and a limit portion extending horizontally toward one side of the center is also provided on the top of each claw; A support frame, comprising a disk and a threaded rod, wherein the disk is arranged parallel to the table top, one end of the threaded rod is vertically fixedly connected to the center of the disk, and the other end passes through the table top downward along the through hole; A fastener, whose size is larger than the diameter of the through hole; the fastener has an internal screw hole and can be screwed on the threaded rod; the fastener is used to adjust the relative height between the disk surface in the support frame and the carrier.

2. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 1, characterized in that: The number of the strip holes in the table is four, and each of the strip holes is centered on the through hole on the table and distributed on the diagonal of a rectangle; the number of the claws is also four.

3. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 1, characterized in that: Each of the clamping claws comprises a base and a rod body; the cross section of the base is in the shape of an "I" character, and the smaller portion in the middle of the base is clamped in the strip hole, thereby allowing the clamping claw to move horizontally relative to the platform along the extension direction of the strip hole; and / or The base is also provided with a screw hole perpendicular to the table plate, and the clamping claw and the carrier are fixed along the screw hole by bolts.

4. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 3, characterized in that: The rod body of the clamping claw is an integrated structure, and is formed by vertically splicing three sections of angle iron-shaped rods in pairs; in each clamping claw installed on the same carrier, the angle iron-shaped structure of each section of the rod is bent inward at 90 degrees.

5. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 3, characterized in that: The table top is a single-layer board or a multi-layer board; and / or The strip holes in the table plate are through holes or blind holes; When the strip-shaped holes are blind holes, the table is further provided with a plurality of cavities located below each of the strip-shaped holes; the width of the cavity matches the larger portion of the base of the claw and is larger than the width of the strip-shaped hole.

6. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 3, characterized in that: The number of the fasteners is at least one, and one of the fasteners is located at the upper portion of the table surface, and is used to limit the downward movement of the combination of the fastener and the support frame relative to the carrier.

7. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 3, characterized in that: The support frame adopts an integrated structure; wherein the disk surface adopts a frame structure, including an external annular frame, an internal center plate, and a plurality of connecting rods connecting the annular frame and the center plate.

8. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 1, characterized in that: It also includes a lifting mechanism, which is used to drive the support frame to move up and down in the vertical direction.

9. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 8, characterized in that: The lifting mechanism adopts a hydraulic cylinder or an electric cylinder; and / or The lifting mechanism is installed below the platform; and / or The top rod in the lifting mechanism is fixedly connected or abutted against the threaded rod of the support frame.

10. The clamping device for thermal runaway test of multi-specification battery packs as claimed in claim 9, characterized in that: The carrier, claws, support frame and fasteners are structural parts made of heat-resistant steel plates; The carrier also includes a protective skirt plate, which surrounds the outer circumference of the lower space of the platform.

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