Supporting clamp and shell welding device

Abstract

The utility model belongs to the technical field of batteries, and discloses a supporting clamp and a shell welding device.The supporting clamp comprises a square frame and a plurality of supporting plates, and a fixing piece is arranged at each vertex of the square frame; first telescopic adjusting assemblies are arranged between each fixing piece and the fixing piece adjacent to the fixing piece in the first direction, between each fixing piece and the fixing piece adjacent to the fixing piece in the second direction and between each fixing piece and the fixing piece adjacent to the fixing piece in the third direction to serve as edges of the square frame. The first direction, the second direction and the third direction are mutually vertical in pairs; the first telescopic adjusting assembly is telescopic; the supporting plate is arranged on any fixing piece on at least one side of the square frame in the third direction and can be used for supporting the shell of the battery module, simulating the supporting effect of the battery cell on the shell and then welding the shell, the test trueness is improved, meanwhile, the battery cell does not need to be used, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a supporting fixture and a shell welding device. Background Art

[0002] Before the battery module is officially put into mass production, it is necessary to conduct multiple tests on the battery module. Therefore, it is necessary to assemble multiple battery module test pieces for related tests. After the test, the battery module test pieces are often scrapped, which will cause a waste of resources and increase the cost of the test. The battery cell is one of the important components of the battery module. If the battery cell is not assembled, it may affect the test results of the battery module test piece and make it inconsistent with the actual results.

[0003] When assembling battery modules, especially battery modules with soft-pack cells, the cells need to be stacked and glued together, and then the outer shell is covered on the outside of the stacked cell group, and the outer shell is welded. In the prior art, it is necessary to evaluate the welding effect of the outer shell of the test battery module, that is, after the battery module is assembled, samples are taken to detect the pull-out force at the weld and evaluate the appearance of the outer shell after welding, and finally the outer shell is scrapped. Similar to the above-mentioned outer shell welding quality test, there is no need to test the performance or function of the cell itself, only the support force and fixing effect of the battery module outer shell need to be provided for testing. If the test piece is directly assembled with cells, the verification cost will be high. At the same time, there are many uncertain factors in welding verification, such as power, spot size, welding path, etc. These uncertain factors may cause the laser to hit the cell in the battery module and cause a fire accident.

[0004] In the prior art, fake battery cells are also used instead of battery cells for assembly, but it is only applicable to the welding of battery modules of one specification, and after the battery modules are welded, the samples are taken to detect the pull-out force of the welds and the appearance of the outer shell welding is evaluated, the modules are still scrapped. The verification cost is also very high. At the same time, fake battery cells are also flammable, and there are certain safety hazards during welding verification.

[0005] Therefore, there is an urgent need for a supporting fixture and a shell welding device to solve the above technical problems. Utility Model Content

[0006] One purpose of the utility model is to provide a supporting fixture, which can simulate the actual state of battery cells being assembled in a housing after being stacked, thereby improving the authenticity of the test, and at the same time, does not require the use of battery cells, thereby improving safety.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] Support fixture, including:

[0009] A square frame, wherein each vertex of the square frame is provided with a fixing piece, and a first telescopic adjustment component is provided between each fixing piece and the fixing piece adjacent to it along the first direction, between each fixing piece and the fixing piece adjacent to it along the second direction, and between each fixing piece and the fixing piece adjacent to it along the third direction, so as to serve as the edge of the square frame, and the first direction, the second direction, and the third direction are mutually perpendicular in pairs; the first telescopic adjustment component is telescopic;

[0010] A plurality of support plates are arranged on any one of the fixing members on at least one side of the square frame along the third direction.

[0011] Optionally, the first telescopic adjustment component includes:

[0012] Two connecting frames, respectively fixed to two adjacent fixing members, to serve as edges of the square frame;

[0013] At least one guide member is slidably connected between the two connecting frames, and the two connecting frames can move closer to or farther from each other along the guide member;

[0014] The locking member is passed through at least one of the guide members and can be tightly fixed to the connecting frame.

[0015] Optionally, the first telescopic adjustment component includes:

[0016] Two connecting frames, respectively fixed to two adjacent fixing members, to serve as edges of the square frame;

[0017] A lead screw has one end limitedly connected to one of the above-mentioned connecting frames, and the other end is threadedly connected to the other of the above-mentioned connecting frames. The lead screw rotates to drive the two above-mentioned connecting frames to move closer to or away from each other.

[0018] Optionally, the fixing member includes a main body and at least three fixing parts, and at least one of the fixing parts is respectively provided on one side of the main body along the first direction, one side of the main body along the second direction, and one side of the main body along the third direction, and the fixing parts are connected to the first telescopic adjustment assembly.

[0019] Optionally, one of the above-mentioned fixed part and the above-mentioned first telescopic adjustment component is provided with a plurality of sliding grooves, and the other is provided with a plurality of sliding blocks. The above-mentioned sliding grooves and the above-mentioned sliding blocks are slidably connected in a one-to-one manner. The above-mentioned fixed part can slide to a preset position along with the sliding between the above-mentioned sliding blocks and the above-mentioned sliding grooves, and is connected to the above-mentioned first telescopic adjustment component by bolts.

[0020] Optionally, at least one second telescopic adjustment component is connected between each of the first telescopic adjustment components extending along the first direction and the first telescopic adjustment component adjacent to and parallel to it along the second direction, and between each of the first telescopic adjustment components extending along the first direction and the first telescopic adjustment component adjacent to and parallel to it along the third direction, and the second telescopic adjustment component has the same structure as the first telescopic adjustment component.

[0021] Optionally, a connecting angle bracket is connected between the two connected second telescopic adjustment components and between the connected first telescopic adjustment component and the second telescopic adjustment component.

[0022] Optionally, it further comprises a plurality of elastic members, and the elastic parts of the plurality of elastic members are protruding from one side of the square frame along the third direction.

[0023] Optionally, the elastic member is a hydraulic buffer, and the output end of the hydraulic buffer is protruding from one side of the square frame along the third direction.

[0024] Another object of the utility model is to provide a shell welding device, which can simulate the actual state of battery cells being assembled in the shell after being stacked, thereby improving the authenticity of the test, and at the same time, does not require the use of battery cells, thereby improving safety.

[0025] To achieve this purpose, the utility model adopts the following technical solutions:

[0026] The shell welding device comprises a limiting tool and the supporting fixture described in any of the above schemes, wherein the supporting fixture is arranged in the limiting tool, and the limiting tool can limit the shell to abut against the outer periphery of the supporting fixture to facilitate the welding of the shell.

[0027] Beneficial effects of the utility model:

[0028] The utility model provides a support fixture and a shell welding device. By setting a square frame and a support plate, it can simulate the structure of a battery pack after stacking battery cells, avoid the safety problem caused by the contact between the laser and the battery cells or fake battery cells during the welding process, and improve the safety. In addition, a first telescopic adjustment component is set between any two adjacent fixings on the square frame, so that the square frame can be adjusted in three directions of X direction, Y direction and Z direction to adjust the size of the square frame in the X direction, Y direction and Z direction, and then can simulate battery cell groups of various sizes and specifications, thereby improving the compatibility of the support fixture.

[0029] Then, the supporting fixture and the limiting tooling cooperate with each other to assemble and weld the shell on the outer periphery of the supporting fixture. That is, the supporting fixture gives supporting force to the battery cell inside the shell, and the limiting tooling gives pressure to the outside of the shell, so that the shell meets the assembly position of the shell and is welded under the cooperation of the two. The welded shell is then subjected to corresponding shell welding test evaluation and other tests. No battery cell is required and it can be reused, which reduces the testing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an axonometric diagram of a support fixture provided in the first embodiment of the present utility model from one viewing angle;

[0031] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0032] Figure 3 yes Figure 2 The partial enlarged view of the support plate is hidden at B in the middle;

[0033] Figure 4 It is an axonometric view of the fixing member provided in the first embodiment of the utility model;

[0034] Figure 5 It is an axonometric diagram of the first telescopic adjustment assembly provided in the first embodiment of the utility model;

[0035] Figure 6 yes Figure 1 A partial enlarged view of point C in the middle;

[0036] Figure 7 It is an axonometric diagram of another perspective of the support fixture provided in the first embodiment of the utility model;

[0037] Figure 8 It is a partial enlarged view of the elastic member provided in the first embodiment of the utility model;

[0038] Fig. 9 is a perspective view of a support fixture provided by Embodiment 1 of the present utility model assembled with a housing;

[0039] Fig.10 This is an axonometric diagram of the shell welding device provided in the first embodiment of the utility model;

[0040] Fig.11 This is an axonometric diagram of a partial structure of a shell welding device provided in the first embodiment of the present utility model;

[0041] Fig.12 It is an axonometric view of the first telescopic adjustment component provided in the second embodiment of the present utility model.

[0042] In the figure:

[0043] 10. Square frame; 11. Fixing piece; 111. Fixing part; 1111. Fixing hole; 1112. Sliding block; 112. Main body; 113. Fixing column; 12. First telescopic adjustment assembly; 121. Connecting frame; 1211. Sliding groove; 122. Guide rail; 123. Locking piece; 124. Guide rod; 125. Lead screw; 13. Connecting angle frame; 14. Second telescopic adjustment assembly; 15. Fixed angle frame;

[0044] 20. Support plate; 21. Threaded hole;

[0045] 30. elastic member; 31. outer cylinder; 32. elastic part; 33. fixing nut;

[0046] 200, housing;

[0047] 300, limiting tooling; 310, limiting block; 320, pressing member; 330, abutting plate; 331, through hole. DETAILED DESCRIPTION

[0048] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0049] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0052] Embodiment 1

[0053] This embodiment provides a supporting fixture for simulating a battery pack after battery cells are stacked and formed, so as to support the welding of the outer shell 200 .

[0054] It should be noted that the first direction in this embodiment is Figure 1 The X direction is also the length direction of the support fixture; the second direction in this embodiment is Figure 1 The Y direction is also the width direction of the support fixture, and the third direction is Figure 1 The Z direction is the height direction of the supporting fixture, and the X direction, Y direction and Z direction are perpendicular to each other. The following description will be made based on the X direction, Y direction and Z direction.

[0055] Please refer to Figure 1 and Figure 2 Specifically, the support fixture includes a square frame 10 and a plurality of support plates 20. A fixing piece 11 is provided at each vertex of the square frame 10. A first telescopic adjustment component 12 is provided between each fixing piece 11 and the fixing piece 11 adjacent to it in the X direction, between each fixing piece 11 and the fixing piece 11 adjacent to it in the Y direction, and between each fixing piece 11 and the fixing piece 11 adjacent to it in the Z direction, so as to serve as the edge of the square frame 10, and thus simulate the supporting effect of the battery pack on the housing 200 after the battery cells are stacked. Moreover, the first telescopic adjustment component 12 is telescopic, so that the distance between each fixing piece 11 and any fixing piece 11 adjacent to it in the X direction, the Y direction, and the Z direction can be adjusted; thus, the adjustable setting of the distance of the support fixture in the X direction, the Y direction, and the Z direction can be realized. Furthermore, the support plate 20 is disposed on any fixing member 11 on at least one side of the square frame 10 along the Z direction, and can be used to support the top of the battery module housing 200 , simulating the supporting effect of the top of the battery cell on the top of the housing 200 .

[0056] The support fixture in this embodiment, by providing a square frame 10 and a support plate 20, can simulate the structure of a battery pack after stacking battery cells, avoid safety problems caused by the laser contacting the battery cells or fake battery cells during welding during assembly and welding, and improve safety. In addition, a first telescopic adjustment component 12 is provided between any two adjacent fixing members 11 on the square frame 10, so that the square frame 10 can be adjusted in distance in three directions, namely, the X direction, the Y direction, and the Z direction, so as to adjust the dimensions of the square frame 10 in the X direction, the Y direction, and the Z direction, thereby simulating battery cell groups of various sizes and specifications, and improving the compatibility of the support fixture.

[0057] Then, the outer shell 200 is assembled and welded on the outer periphery of the support fixture through the cooperation between the support fixture and the limiting fixture 300. That is, the support fixture provides supporting force to the battery cell inside the outer shell 200, and the limiting fixture 300 provides pressure to the outside of the outer shell 200. Therefore, the outer shell 200 meets the assembly position of the outer shell 200 and is welded with the cooperation of the two. Then, the welded outer shell 200 is subjected to corresponding outer shell 200 welding test evaluation and other tests, without the use of battery cells, and can be reused, thereby reducing the testing cost.

[0058] Specifically, in this embodiment, the support clamp includes twelve edges, therefore, the support clamp includes four first telescopic adjustment components 12 extending along the X direction, four first telescopic adjustment components 12 extending along the Y direction, and four first telescopic adjustment components 12 extending along the Z direction, to serve as the twelve edges of the square frame 10.

[0059] Please refer to Figures 2 to 4 In this embodiment, the fixing member 11 includes a main body 112 and at least three fixing portions 111. At least one fixing portion 111 is respectively provided on one side of the main body 112 along the X direction, one side of the main body 112 along the Y direction, and one side of the main body 112 along the Z direction. The fixing portion 111 is connected to the first telescopic adjustment component 12 to achieve the fixing and stabilizing effect of the fixing member 11 on the first telescopic adjustment component 12.

[0060] Optionally, the fixing portion 111 and the first telescopic adjustment component 12 may be connected by bolting, bonding, clamping or welding, and the stability of the connection between the two only needs to be met.

[0061] like Figure 3 and Figure 4As shown, specifically, in this embodiment, one of the fixed part 111 and the first telescopic adjustment component 12 is provided with a plurality of slide grooves 1211, and the other is provided with a plurality of sliders 1112. The slide grooves 1211 and the sliders 1112 are slidably connected in a one-to-one correspondence. The fixed part 111 can slide to a preset position along with the sliding between the sliders 1112 and the slide grooves 1211, and be fixedly connected to the first telescopic adjustment component 12, that is, the fixed part 111 and the corresponding first telescopic adjustment component 12 are first guided and limited by means of the sliding connection between the slide grooves 1211 and the sliders 1112, and then when the fixed part 111 and the first telescopic adjustment component 12 slide to the preset position, the two can be fixed to further ensure the stability of the connection between the two.

[0062] Optionally, in this embodiment, the slider 1112 is disposed on the fixing portion 111 , and the slide groove 1211 is disposed on the first telescopic adjustment component 12 , so that a sliding connection between the fixing portion 111 and the first telescopic adjustment component 12 can be achieved.

[0063] It can be understood that the above-mentioned preset position is the final assembly position of the slider 1112 of the fixing part 111 and the slide groove 1211 of the first telescopic adjustment component 12. After reaching this position, the two will no longer slide and will be fixed to ensure a stable connection between the fixing part 111 and the first telescopic adjustment component 12.

[0064] like Figure 3 and Figure 4 As shown, more specifically, the fixing portion 111 is provided with a fixing hole 1111, the fixing column 113 is threadedly connected to the fixing hole 1111, and the fixing column 113 is passed through the fixing hole 1111 and is tightly arranged with the first telescopic adjustment component 12, so as to tightly connect the fixing portion 111 with the first telescopic adjustment component 12, so that the slider 1112 and the slide groove 1211 are fixed and no longer slide, so as to realize a stable connection between the fixing portion 111 and the first telescopic adjustment component 12.

[0065] like Figure 4 As shown, in order to ensure the bearing capacity of the square frame 10 so as to better provide internal support to the shell 200; in some embodiments, the fixing portion 111 is provided with four, that is, one fixing portion 111 is provided on any one of the side of the main body 112 facing the X direction, the side of the main body 112 facing the Y direction, or the side of the main body 112 facing the Z direction, so as to further improve the connection stability between the fixing member 11 and each first telescopic adjustment component 12 connected thereto, thereby making the first telescopic adjustment component 12 more stable when telescoping, so as to improve the stability of the square frame 10.

[0066] Please refer to Figure 5The first telescopic adjustment assembly 12 includes a locking member 123, two connecting frames 121 and at least one guide member. The two connecting frames 121 are respectively fixed to two adjacent fixing members 11 to serve as the edges of the square frame 10. At least one guide member is slidably connected between the two connecting frames 121, and the two connecting frames 121 can move closer to or farther from each other along the guide member. The locking member 123 is passed through at least one guide member and can be tightly fixed to the connecting frame 121. When in use, the locking member 123 is first loosened, and then one connecting frame 121 is pulled, so that the connecting frame 121 can slide along the guide member, thereby adjusting the distance between the two connecting frames 121. After the distance is adjusted, the distance between the two connecting frames 121 can be locked by passing the locking member 123 through the guide member and being tightly fixed to the connecting frame 121, thereby achieving the adjustment function of the first telescopic adjustment assembly 12.

[0067] Specifically, the connecting frame 121 is provided with a groove structure, and the groove structure can cooperate with the guide member to achieve relative sliding between the connecting frame 121 and the guide member.

[0068] In some embodiments, the connecting frame 121 is a profile structure, which has low cost and is convenient for overlapping each other. Specifically, the profile structure is a square structure, and groove structures are provided on all four sides to achieve the sliding of the guide member. The groove structure can also be used as a slide groove 1211 to achieve the sliding connection between the fixed part 111 and the first telescopic adjustment component 12; and the profile structure is also provided with a center hole, which can also be slidably connected with the guide member, and no further processing is required, and the manufacturing cost is low.

[0069] In some optional embodiments, the guide member can be a guide rail 122 or a guide rod 124. If it is a guide rail 122, both ends of the guide rail 122 are slidably connected to the groove structure on any surface of the two connecting frames 121; if it is a guide rod 124, both ends of the guide rod 124 are slidably connected to the center holes of the two connecting frames 121. The above two structures can realize the guiding property of the guide member for the relative movement of the two connecting frames 121.

[0070] It is understandable that the number of guide members can be changed according to actual needs and is not specifically limited here.

[0071] like Figure 5 As shown, exemplarily, in the present embodiment, two guide members are provided, namely, the first telescopic adjustment component 12 comprises a guide rail 122 and a guide rod 124. Through the dual guiding action of the guide rail 122 and the guide rod 124, not only can the relative movement between the two connecting frames 121 be ensured to be smoother, but also the connection stability between the two connecting frames 121 is further enhanced, so that the two connecting frames 121 can only perform relative sliding movement without sliding or rotating, so as to improve the supporting strength of the first telescopic adjustment component 12 as an edge.

[0072] In some embodiments, the locking member 123 is a bolt, which is threadedly connected to the guide member to increase the limiting effect between the locking member 123 and the guide member, so that the locking member 123 can stably lock and fix the guide member on the connecting frame 121.

[0073] Please refer back to Figure 1 and Figure 2 In the present embodiment, four support plates 20 are provided, and the four support plates 20 are respectively connected to the connecting frames 121 connected to the four fixing members 11 themselves, so that the support plate 20 can move with the extension and retraction of the corresponding first telescopic adjustment assembly 12, and will not limit the extension and retraction of the first telescopic adjustment assembly 12. At the same time, the connection between the support plate 20 and the connecting frame 121 also improves the connection stability of the support plate 20, so as to avoid the problem that the connection point of the support plate 20 is small, resulting in a high degree of freedom and shaking, thereby improving the support reliability of the support plate 20.

[0074] Specifically, the support plate 20 is provided with a plurality of threaded holes 21, and the threaded holes 21 are equipped with bolts to achieve the connection between the support plate 20 and the connecting frame 121. In addition, some of the plurality of threaded holes 21 can also be connected to the top of the housing 200, ensuring the limiting and supporting effect of the support plate 20 on the top of the housing 200, so as to facilitate better welding of the housing 200.

[0075] Please refer to Figure 6 Since the battery module of large size is large in its length direction, the first telescopic adjustment component 12 will be unstable if it is too long; therefore, in some embodiments, at least one second telescopic adjustment component 14 is connected between each first telescopic adjustment component 12 extending along the X direction and the first telescopic adjustment component 12 adjacent and parallel to it along the Y direction, and between each first telescopic adjustment component 12 extending along the X direction and the first telescopic adjustment component 12 adjacent and parallel to it along the Z direction, and the second telescopic adjustment component 14 has the same structure as the first telescopic adjustment component 12 to reduce the number of parts. That is, in the length direction of the support fixture, the second telescopic adjustment component 14 is added as a support structure to the first telescopic adjustment component 12 with a longer length, so as to make the structure of the square frame 10 more stable, improve the service life of the support fixture, and also increase the maximum size of the support fixture, broaden the compatibility of the support fixture, and realize the simulation replacement of all current large-size battery modules.

[0076] It is understandable that since the second telescopic adjustment component 14 has the same structure as the first telescopic adjustment component 12 , a detailed description thereof will not be given here.

[0077] Exemplarily, in this embodiment, two second telescopic adjustment components 14 that are telescopic along the Y direction and two second telescopic adjustment components 14 that are telescopic along the Z direction are provided, and the four second telescopic adjustment components 14 are distributed between the four first telescopic adjustment components 12 that are telescopic along the X direction, so as to ensure the supporting effect of the support clamp when the length of the support clamp along the X direction increases.

[0078] Specifically, the connecting frame 121 of the second telescopic adjustment component 14 is directly connected to the connecting frame 121 in the first telescopic adjustment component 12 extending along the X direction to avoid affecting the telescopic effects of the first telescopic adjustment component 12 and the second telescopic adjustment component 14 .

[0079] Optionally, a connecting angle bracket 13 is connected between the two connected second telescopic adjustment components 14, and between the connected first telescopic adjustment component 12 and the second telescopic adjustment component 14. The connecting angle bracket 13 is configured to connect the first telescopic adjustment component 12 and the second telescopic adjustment component 14 to improve the connection strength between the two.

[0080] Please refer to Figure 7 and Figure 8 In this embodiment, the support clamp also includes a plurality of elastic members 30, and the elastic portions 32 of the plurality of elastic members 30 are protruded on one side of the square frame 10 along the Z direction, so that the support clamp has elasticity on one side along the Z direction, so as to simulate the elastic state of a colloid on one side after the battery cells are stacked, so that the support clamp is more in line with the actual connection and support state between the battery cell group and the shell 200.

[0081] Since the battery pack after stacking the cells is glued at the bottom when being installed in the housing 200 , the elastic member 30 protrudes from the bottom of the square frame 10 to simulate the elastic state of the colloid.

[0082] Specifically, the square frame 10 further includes a fixing angle frame 15 , the elastic member 30 is fixed on the fixing angle frame 15 , and the elastic portion 32 of the elastic member 30 extends out of the bottom of the fixing angle frame 15 to achieve the fixing of the elastic member 30 and the simulation of the colloid.

[0083] In some optional embodiments, the elastic member 30 may be a structure made of elastic materials such as silicone, and can be directly attached to the bottom of the fixed angle bracket 15 to achieve colloid simulation.

[0084] In some optional embodiments, the elastic member 30 is an oil pressure buffer, and the output end of the oil pressure buffer is protruding on one side of the square frame 10 along the Z direction, that is, the bottom of the square frame 10, so that the support fixture can simulate the elastic state of the colloid.

[0085] like Figure 8As shown, specifically, the elastic member 30 includes an outer cylinder 31 and an elastic portion 32, the outer cylinder 31 is arranged on the fixed angle bracket 15, the elastic portion 32 is slidably connected to the inside of the outer cylinder 31, and the elastic portion 32 is penetrated through the bottom of the fixed angle bracket 15, that is, the elastic portion 32 is a piston, and the outer cylinder 31 is an oil cylinder. When a certain pressure is applied to the elastic portion 32 by the outside, the oil pressure in the oil cylinder will give the elastic portion 32 a certain reaction force, so that the elastic portion 32 has a certain elasticity toward the outside.

[0086] More specifically, the outer cylinder 31 is provided with an external thread, and the fixing angle bracket 15 is provided with an internal thread. The outer cylinder 31 is threadedly connected with the fixing angle bracket 15 to achieve the fixation of the elastic member 30 .

[0087] Furthermore, the elastic member 30 further includes two fixing nuts 33 , which are threadedly connected to the outer cylinder 31 and abut against the fixing angle bracket 15 to limit the position of the elastic member 30 .

[0088] Optionally, at the bottom of the square frame 10, an elastic member 30 is provided at the connection between the connected first telescopic adjustment components 12, and at the connection between the first telescopic adjustment component 12 and the second telescopic adjustment component 14, so as to better simulate the elastic state of the support clamp.

[0089] Please refer to Figures 9 to 11 This embodiment also provides a shell welding device, which includes a limiting fixture 300 and a support fixture described in any of the above schemes. The support fixture is arranged in the limiting fixture 300. The limiting fixture 300 can limit the shell 200 to abut against the outer periphery of the support fixture to facilitate the welding of the shell 200. By using the above support fixture, the shell welding device can perform tests such as shell 200 welding test evaluation under the condition of satisfying the support force of the shell 200, without using battery cells, reducing the test cost and improving the test safety.

[0090] Specifically, the limiting tool 300 includes four limiting blocks 310, four pressing members 320 and an abutment plate 330. The four limiting blocks 310 are respectively arranged on both sides of the shell 200 along the X direction and the two sides of the shell 200 along the Y direction to achieve the connection of the shell 200 in the X direction and the Y direction. The four pressing members 320 are respectively pressed on the four limiting blocks 310 to achieve the pressing and limiting of the shell 200 in the X direction and the Y direction; the abutment plate 330 is arranged on the top of the shell 200 to press and limit the top of the shell 200. Such an arrangement can meet the limit pressing of each surface of the shell 200, and the limiting tool 300 and the supporting fixture press the shell 200 on the outside and inside of the surgery respectively, so as to achieve the fixation of the position of the shell 200, so as to facilitate welding between the various structures of the shell 200.

[0091] Optionally, the limiting block 310 and the abutting plate 330 are both arranged to avoid the welding position of the shell 200, so that the welding position of the shell 200 can facilitate welding with a welding gun.

[0092] Specifically, the limit block 310 is only fixed to the ear of the shell 200, so that the clamping piece 320 presses the limit block 310 to clamp the side of the shell 200. The limit block 310 does not interfere with the connection between the side panels of the shell 200. At the same time, the limit block 310 does not interfere with the connection between the side panels and the top panel of the shell 200 to avoid the welding position of the shell 200.

[0093] More specifically, the contact plate 330 is provided with a through hole 331 to expose the welding position between the top plate and the side plate of the housing 200 , that is, to avoid the welding position of the housing 200 .

[0094] Embodiment 2

[0095] This embodiment provides a supporting fixture and a shell welding device. The difference between this embodiment and the first embodiment lies in the different structures of the first telescopic adjustment component 12 and the second telescopic adjustment component 14. The first telescopic adjustment component 12 is used for description below.

[0096] Please refer to Figure 6 Specifically, the first telescopic adjustment assembly 12 includes a lead screw 125 and two connecting frames 121. The two connecting frames 121 are respectively fixed to two adjacent fixing members 11 to serve as edges of the square frame 10. One end of the lead screw 125 is limitedly connected to one of the connecting frames 121, and the other end is threadedly connected to the other connecting frame 121. When in use, by rotating the lead screw 125, the other connecting frame 121 can be made to reciprocate linearly along the axis direction of the lead screw 125, thereby realizing that the two connecting frames 121 are close to or away from each other.

[0097] Specifically, one end of the lead screw 125 is limitedly connected to the connecting frame 121 along its axial direction, and the lead screw 125 can be rotatably connected to the connecting frame 121 to realize the rotation of the lead screw 125, thereby allowing the other connecting frame 121 to perform reciprocating linear motion relative to the connecting frame 121.

[0098] In some embodiments, a guide rail 122 is also slidably provided between the two connecting frames 121 to improve the stability of the relative movement between the two and avoid shaking that may cause damage to the supporting fixture.

[0099] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A supporting fixture, characterized in that: include: A square frame (10), wherein each vertex of the square frame (10) is provided with a fixing member (11), and a first telescopic adjustment component (12) is provided between each fixing member (11) and the fixing member (11) adjacent to it in a first direction, between each fixing member (11) and the fixing member (11) adjacent to it in a second direction, and between each fixing member (11) and the fixing member (11) adjacent to it in a third direction, so as to serve as an edge of the square frame (10), and the first direction, the second direction and the third direction are mutually perpendicular in pairs; the first telescopic adjustment component (12) is telescopic; A plurality of support plates (20), wherein the support plates (20) are arranged on any one of the fixing members (11) on at least one side of the square frame (10) along the third direction.

2. The support fixture according to claim 1, characterized in that: The first telescopic adjustment component (12) comprises: Two connecting frames (121) are respectively fixed to two adjacent fixing members (11) to serve as edges of the square frame (10); At least one guide member is slidably connected between the two connecting frames (121), and the two connecting frames (121) can move closer to each other or farther away from each other along the guide member; A locking member (123) is inserted through at least one of the guide members and can be tightly fixed to the connecting frame (121).

3. The support fixture according to claim 1, characterized in that: The first telescopic adjustment component (12) comprises: Two connecting frames (121) are respectively fixed to two adjacent fixing members (11) to serve as edges of the square frame (10); A lead screw (125) has one end limitedly connected to one of the connecting frames (121) and the other end threadedly connected to the other connecting frame (121). The lead screw (125) rotates to drive the two connecting frames (121) to move closer to or farther away from each other.

4. The supporting fixture according to claim 1, characterized in that: The fixing member (11) comprises a main body (112) and at least three fixing parts (111), and at least one fixing part (111) is respectively provided on one side of the main body (112) along a first direction, on one side of the main body (112) along a second direction, and on one side of the main body (112) along a third direction, and the fixing part (111) is connected to the first telescopic adjustment component (12).

5. The supporting fixture according to claim 4, characterized in that: One of the fixed portion (111) and the first telescopic adjustment component (12) is provided with a plurality of sliding grooves (1211), and the other is provided with a plurality of sliding blocks (1112); the sliding grooves (1211) and the sliding blocks (1112) are slidably connected in a one-to-one correspondence; the fixed portion (111) can slide to a preset position as the sliding blocks (1112) and the sliding grooves (1211) slide, and is fixedly connected to the first telescopic adjustment component (12).

6. The supporting fixture according to claim 1, characterized in that: At least one second telescopic adjustment component (14) is connected between each of the first telescopic adjustment components (12) extending along the first direction and the first telescopic adjustment component (12) adjacent to and parallel to it along the second direction, and between each of the first telescopic adjustment components (12) extending along the first direction and the first telescopic adjustment component (12) adjacent to and parallel to it along the third direction, and the second telescopic adjustment component (14) has the same structure as the first telescopic adjustment component (12).

7. The supporting fixture according to claim 6, characterized in that: A connecting angle bracket (13) is connected between the two connected second telescopic adjustment components (14), and between the connected first telescopic adjustment component (12) and the second telescopic adjustment component (14).

8. The supporting fixture according to any one of claims 1 to 7, characterized in that: It also comprises a plurality of elastic members (30), wherein the elastic parts (32) of the plurality of elastic members (30) are protrudingly arranged on one side of the square frame (10) along the third direction.

9. The supporting fixture according to claim 8, characterized in that: The elastic member (30) is an oil pressure buffer, and the output end of the oil pressure buffer is protrudingly arranged on one side of the square frame (10) along the third direction.

10. Shell welding device, characterized in that, It comprises a limiting tool (300) and a supporting fixture as described in any one of claims 1 to 9, wherein the supporting fixture is arranged in the limiting tool (300), and the limiting tool (300) can limit the outer shell (200) to abut against the outer periphery of the supporting fixture to facilitate welding of the outer shell (200).

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