Air tightness detection tool for battery box body

Abstract

The utility model provides an air tightness detection tool for a battery box body. The air tightness detection tool comprises a flexible platform, and a pressing assembly, a height adjusting assembly, a guiding and positioning assembly, a side blocking assembly and a box body supporting plate assembly which are detachably and fixedly arranged on the flexible platform, the battery box body is of a hollow structure with an open top surface; the battery box body is reversely buckled on the top surface of the box body supporting plate assembly; the box body supporting plate assembly is supported by the height adjusting assembly, the horizontal height of the box body supporting plate assembly is adjusted, the supporting plate assembly can adapt to box bodies of different thicknesses, the height value between the back face of the battery box body and the surface of the flexible platform is limited to be a fixed value, and according to the height fixed value, only one specification needs to be designed for the pressing assembly, the guiding and positioning assembly and the side blocking assembly; meanwhile, all the components can freely move and be freely combined on the flexible platform, so that the battery box bodies with different lengths, widths and heights can be clamped for airtightness detection work, the airtight tool development period of a new battery box body is shortened, and the airtight tool development cost of the new battery box body is saved.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, specifically to a special airtight testing tooling for a battery box housing that accommodates electric vehicle battery packs. Background Technology

[0002] A battery housing is a shell or container structure used to house the battery pack of an electric vehicle. It is also known as a "battery tray" or "battery pack lower shell". Its design mainly considers functions such as protecting the battery pack, providing support and connection, heat dissipation, and facilitating installation and maintenance. At the same time, the sealing performance of the battery pack has a crucial impact on the safety of the battery pack and even the entire vehicle. Therefore, relevant manufacturers include the airtightness testing of the battery housing as a mandatory inspection item in the production process.

[0003] Existing airtightness testing fixtures for battery boxes are mostly specialized, meaning one fixture can only be used for airtightness testing of one type of battery box. Due to the rapid product updates and iterations of battery boxes (mainly due to differences in external specifications such as length, width, and thickness), the design, manufacturing, and usage cycles of airtightness testing fixtures are short. Furthermore, the components of different airtightness testing fixtures are not interchangeable or universal, and airtightness testing fixtures for discontinued battery boxes cannot be reused, resulting in asset scrapping and waste. Therefore, a new type of airtightness testing fixture for battery boxes that can be applied to different specifications is needed to solve these problems. Utility Model Content

[0004] To address the problems mentioned in the background section, this utility model provides a novel battery box airtightness testing fixture applicable to battery boxes of different specifications, thereby shortening the development cycle of the new battery box airtightness fixture and saving the development cost of the new battery box airtightness fixture.

[0005] The present invention adopts the following technical solution: a battery box airtightness testing fixture, including a flexible platform, a clamping component, a height adjustment component, a guide positioning component and a box pallet assembly. Multiple height adjustment components are detachably and fixedly installed in the middle of the top surface of the flexible platform. The box pallet assembly is fixedly installed on the top of multiple height adjustment components, and the horizontal height of the box pallet assembly is adjusted by the height adjustment components. Multiple clamping components and guide positioning components are detachably and fixedly installed on the top surface of the flexible platform and are evenly distributed on the four sides of the box pallet assembly.

[0006] The top surface of the battery box is an open surface. The battery box is inverted and placed on the top surface of the box support assembly. The battery box is positioned by multiple guiding and positioning components, and the battery box is pressed and fixed to the top surface of the box support assembly by multiple pressing components, thereby sealing the open surface.

[0007] Furthermore, the battery box airtightness testing fixture also includes a side-blocking assembly, which has a connector on the front or rear side wall of the battery box. The side-blocking assembly is detachably and fixedly installed on the top surface of the flexible platform at a position corresponding to the connector, and the side-blocking assembly is used to seal the connector.

[0008] Furthermore, the flexible platform includes a support frame and a support plate fixed to the top of the support frame. Multiple threaded holes are arrayed on the support plate, and the top surface of the support plate, on the side of the outermost threaded hole, is marked with an indicator indicating the position of the threaded holes in the X and / or Y directions.

[0009] Furthermore, a connected water trough is provided at the edge of the top surface of the support plate, and the support plate includes a rubber plug for sealing the threaded hole.

[0010] Furthermore, the clamping assembly includes a clamping support column, a first mounting base plate, a clamping cylinder, a rotating shaft, a swing arm, a pressure arm, a pressure block, and a pressure arm limiting block; the first mounting base plate is fixedly installed at the bottom end of the clamping support column, and after the screw passes through the through hole provided on the first mounting base plate, it is screwed and fixed on the flexible platform, so as to realize the detachable installation of the clamping assembly and the flexible platform;

[0011] The clamping cylinder is fixedly installed on the side of the clamping support. The swing arm is mounted on the clamping cylinder via a rotating shaft. The pressure arm is fixedly installed at the bottom of the swing arm away from the clamping cylinder. The pressure block is fixedly installed at the bottom of the pressure arm. The clamping cylinder drives the rotating shaft to rotate and causes the swing arm, pressure arm, and pressure block to rotate around the axis of the rotating shaft. The pressure arm limiting block is fixedly installed on the top of the clamping support. The pressure arm limiting block is used to limit the degree of pressure of the pressure arm and prevent the pressure block from damaging the battery box.

[0012] Furthermore, the height adjustment assembly includes an adjustment column, an adjustment base plate, a second mounting base plate, a height adjustment component, and a mounting top plate; the adjustment base plate and the mounting top plate are respectively fixedly connected to the bottom and top ends of the adjustment column, and after the screw passes through the through hole provided on the mounting top plate, it is screwed and fixed to the bottom surface of the box support plate assembly, realizing the detachable installation of the height adjustment assembly and the box support plate assembly; after the screw passes through the through hole provided on the second mounting base plate, it is screwed and fixed to the flexible platform, realizing the detachable installation of the height adjustment assembly and the flexible platform;

[0013] The height adjustment component includes an adjusting screw and a stud assembly. The adjusting screw is screwed into a threaded hole on the adjusting base plate, and the bottom end of the adjusting screw abuts against the top surface of the second mounting base plate. The stud assembly includes a flat washer, a spring washer, a nut, and a stud. The bottom end of the stud passes through a through hole on the adjusting base plate and is fixedly connected to the second mounting base plate. The top end of the stud is located at the top of the adjusting base plate. The flat washer and the spring washer are sleeved on the outside of the stud, and the nut is screwed onto the stud.

[0014] Furthermore, the guide positioning component includes a positioning support column, a third mounting base plate, and a positioning block; the third mounting base plate and the positioning block are respectively fixedly installed at the bottom and top of the positioning support column, and after the screw passes through the through hole provided on the third mounting base plate, it is screwed and fixed on the flexible platform, so as to realize the detachable installation of the guide positioning component and the flexible platform.

[0015] Furthermore, the positioning block includes a perpendicular mounting block and a vertical plate. The vertical plate is fixedly mounted on the front end of the mounting block. An elongated hole is provided on the mounting block. After the screw passes through the elongated hole on the mounting block, it is screwed and fixed to the top of the positioning support. The upper part of the front end face of the vertical plate is a sloping surface with a guiding function.

[0016] Furthermore, the box pallet assembly includes a pallet and a sealing ring fixedly installed on the edge of the top surface of the pallet, and an air inlet is provided on the pallet.

[0017] Furthermore, the side-blocking assembly includes a side-blocking support column, a fourth mounting base plate, and a cylinder. The fourth mounting base plate is fixedly installed at the bottom end of the side-blocking support column. After the screw passes through the through hole provided on the fourth mounting base plate, it is screwed and fixed on the flexible platform, so as to realize the detachable installation of the side-blocking assembly and the flexible platform.

[0018] The cylinder is fixedly installed on the top of the side plug support, and a side plug block is fixedly installed at the front end of the cylinder's telescopic rod. The side plug block is driven to move horizontally by the cylinder's telescopic rod to seal the connector.

[0019] The battery box airtightness testing fixture in this utility model patent involves inverting the battery box onto a box support assembly. The box support assembly is supported by a height adjustment component, which adjusts its horizontal height to accommodate boxes of different thicknesses. The height between the back of the battery box and the surface of the flexible platform is fixed. Based on this fixed height, the clamping component, guiding and positioning component, and side-blocking component all only need to be designed with one specification. At the same time, each component can move and combine freely on the flexible platform, enabling airtightness testing of battery boxes of different sizes and specifications. This shortens the development cycle of airtightness fixtures for new battery boxes. Except for the support assembly, which needs to be customized according to the specific battery box, other components are universal, saving development costs for airtightness fixtures for new battery boxes. Attached Figure Description

[0020] Appendix Figure 1 This is a schematic diagram of the overall structure of the battery box airtightness testing fixture in this utility model;

[0021] Appendix Figure 2 This is a schematic diagram of the structure of mounting the battery box on the battery box airtightness testing fixture;

[0022] Appendix Figure 3This is a schematic diagram of the structure of the flexible platform 1 in this utility model;

[0023] Appendix Figure 4 This is a partially enlarged structural schematic diagram of the flexible platform 1 in this utility model;

[0024] Appendix Figure 5 This is a schematic diagram of the structure of the clamping component 2 in this utility model;

[0025] Appendix Figure 6 This is a schematic diagram of the height adjustment component 3 in this utility model;

[0026] Appendix Figure 7 This is a schematic diagram of the structure of the guide and positioning component 4 in this utility model;

[0027] Appendix Figure 8 This is a schematic diagram of the structure of the box tray assembly 5 in this utility model;

[0028] Appendix Figure 9 This is a schematic diagram illustrating the structure and principle of the side-blocking component 6 in this utility model;

[0029] The reference numerals in the attached drawings are explained as follows: Flexible platform 1, Support plate 11, Threaded hole 111, Mark 112, Water tank 113, Support frame 12, Pressing assembly 2, Pressing support column 21, First mounting base plate 22, Clamping cylinder 23, Rotating shaft 24, Swing arm 25, Pressure arm 26, Pressure block 27, Pressure arm limit block 28, Height adjustment assembly 3, Adjusting support column 31, Adjusting base plate 32, Second mounting base plate 33, Adjusting screw 34, Stud assembly 35, Mounting top plate 36, Guide positioning assembly 4, Positioning support column 41, Third mounting base plate 42, Positioning block 43, Box support plate assembly 5, Support plate 51, Air inlet 511, Sealing ring 52, Side plug assembly 6, Side plug support column 61, Fourth mounting base plate 62, Cylinder 63, Side plug block 64. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The content of the utility model will be further explained below in conjunction with the drawings:

[0031] The battery box in this patent is a hollow structure with an open top, and has a connector on the front or rear side wall for wire harnesses or other components to pass through.

[0032] Example 1

[0033] Refer to the instruction manual appendix Figure 1 , 2 A battery box airtightness testing fixture includes a flexible platform 1, a clamping assembly 2, a height adjustment assembly 3, a guide and positioning assembly 4, a box support plate assembly 5, and a side plug assembly 6. Figure 1 The middle clamping component 2 is in the open state, attached Figure 2 This is a schematic diagram of the airtight tooling operation of the battery box. At this time, the battery box is upside down on the top surface of the box support assembly 5, the clamping assembly 2 is in the clamping state, and the box support assembly 5 is supported by the height adjustment assembly 3 and its horizontal height is adjusted and limited to a fixed value H. That is, the height value between the back of the battery box and the surface of the flexible platform is a fixed value H. When performing airtight tooling operation for battery boxes of different thicknesses, the height adjustment assembly 3 is used to adjust the height value between the surface of the battery box and the surface of the flexible platform to H.

[0034] Refer to the instruction manual appendix Figure 3 The flexible platform 1 includes a support frame 12 and a support plate 11 fixed to the top of the support frame 12. Adjustable feet are installed at the bottom of the support frame 12. Multiple threaded holes 111 with a spacing of 40mm are arrayed on the support plate 11. The threaded holes 111 facilitate the detachable and fixed connection of various components. On the top surface of the support plate 11, on the side of the outermost threaded hole 111, there is a mark 112 indicating the position of the threaded holes 111 in the X direction and / or Y direction. The mark 112 can be used to record the position of the threaded holes 111 used for the spatial arrangement of various components, which is convenient for reassembly according to the mark 112 after component disassembly, thus improving work efficiency.

[0035] Specifically, a threaded hole 111 located at one corner of the support plate 11 is selected as the starting point for the X and Y directions. The holes are numbered sequentially along the X and Y directions from the starting point. For example, the X direction is labeled as X1, X2, X3... and the Y direction is labeled as Y1, Y2, Y3... Then all the threaded holes 111 will have corresponding numbers. The starting point is numbered X1Y1, and X2Y3 represents the second threaded hole 111 in the X direction and the third threaded hole 111 in the Y direction.

[0036] When performing airtightness testing on the tooling of this patent, after the battery box is pressed and sealed onto the box support plate assembly 5 by the clamping assembly 2, a certain pressure of gas is injected into the battery box through the airtightness tester. Then, bubble-absorbing liquid is sprayed onto the weld seams of the battery box to reveal the leakage points. In order to prevent the bubble-absorbing liquid from leaking and to add a subsequent cleaning process, interconnected water tanks 113 are provided on the four sides of the top surface of the support plate 11. The water tanks 113 are located outside all the threaded holes 111. The support plate 11 also includes rubber plugs to seal the threaded holes 111. The rubber plugs seal the unused threaded holes 111 to prevent the bubble-absorbing liquid from leaking from the threaded holes 111. The bubble-absorbing liquid flows along the battery box onto the support plate 11 and finally flows into the water tank 113. The water tank 113 serves to isolate or collect water, which facilitates the subsequent collection of the airtightness testing bubble-absorbing liquid.

[0037] Refer to the instruction manual appendix Figure 5 The clamping assembly 2 includes a clamping support column 21, a first mounting base plate 22, a clamping cylinder 23, a rotating shaft 24, a swing arm 25, a pressure arm 26, a pressure block 27, and a pressure arm limiting block 28. The first mounting base plate 22 is fixedly installed at the bottom end of the clamping support column 21. After the screw passes through the through hole provided on the first mounting base plate 22 (the through hole contains multiple evenly distributed holes, and the spacing between the through holes is a multiple of 40mm), it is screwed and fixed on the threaded hole 111 of the support plate 11, so as to realize the detachable installation of the first mounting base plate 22 and the support plate 11. After the clamping assembly 2 is moved to the target position on the support plate 11, it is locked and fixed by screws.

[0038] The clamping cylinder 23 is fixedly installed on the side of the clamping support 21 by screws. The swing arm 25 is installed on the clamping cylinder 23 by the rotating shaft 24. The pressure arm 26 is fixedly installed on the bottom of the swing arm 25 away from the clamping cylinder 23 by screws. An elongated hole is provided on the pressure arm 26. After the screw passes through the elongated hole, it is screwed and fixed to the threaded hole on the pressure block 27. The elongated hole facilitates the adjustment of the front and rear position of the pressure block 27 relative to the pressure arm 26, so as to finely adjust the clamping position with the battery box.

[0039] The clamping cylinder 23 adopts the existing Airtac JCK clamping cylinder. The piston rod moves up and down inside the cylinder body, converting linear motion into rotation of the rotating shaft 24 via a crank-slider mechanism inside the cylinder. The swing arm 25 rotates with the rotating shaft 24, driving the pressure arm 26 and the pressure block 27 to rotate around the axis of the rotating shaft 24. Figure 5The cylinder swing arm 25 shown is currently in a horizontal clamping state. The rotating shaft 24 can drive the swing arm 25 to rotate 135° clockwise to either relax or open. When the swing arm 25 swings to the horizontal clamping state, the connecting rod in the crank-slider mechanism inside the cylinder moves to the horizontal state (dead point) and self-locks, ensuring that the pressure arm 26 and the pressure block 27 do not loosen the battery box. At the same time, the pressure arm limiting block 28 is fixedly installed on the top of the pressure support 21 by screws. The pressure arm limiting block 28 is used to limit the degree of pressure of the pressure arm 26, ensuring that the distance from the lower surface of the pressure block 27 to the lower surface of the first mounting base plate 22 is h1, and h1 = H, to prevent the pressure block 27 from damaging the battery box.

[0040] Refer to the instruction manual appendix Figure 6 The height adjustment component 3 includes an adjustment support column 31, an adjustment base plate 32, a second mounting base plate 33, an adjustment screw 34, a stud assembly 35, and a mounting top plate 36. The adjustment base plate 32 and the mounting top plate 36 are respectively fixedly connected to the bottom and top ends of the adjustment support column 31. After the screw passes through the through hole provided on the mounting top plate 36, it is screwed and fixed to the threaded hole provided on the bottom surface of the box support plate assembly 5, so as to realize the detachable installation of the mounting top plate 36 and the box support plate assembly 5. After the screw passes through the through hole provided on the second mounting base plate 33 (the through hole contains multiple evenly distributed through holes, and the spacing between the through holes is a multiple of 40mm), it is screwed and fixed to the threaded hole 111 of the support plate 11, so as to realize the detachable installation of the second mounting base plate 33 and the support plate 11. After the height adjustment component 3 is moved to the target position on the support plate 11, it is locked and fixed by the screw.

[0041] The adjusting screw 34 is screwed into the threaded hole on the adjusting base plate 32, and the bottom end of the adjusting screw 34 abuts against the top surface of the second mounting base plate 33. The stud assembly 35 includes a flat washer, a spring washer, a nut, and a stud. The bottom end of the stud passes through the through hole on the adjusting base plate 32 and is screwed into the threaded hole on the second mounting base plate 33 for fixation. Alternatively, the bottom end of the stud is fixed (e.g., welded) to the second mounting base plate 33, and the top end of the stud passes through the through hole on the adjusting base plate 32, with the top end of the stud located at the top of the adjusting base plate 32. The flat washer and the spring washer are sleeved on the outside of the stud, and the nut is screwed onto the stud. Multiple adjusting screws 34 and stud assemblies 35 are evenly and spaced between the adjusting base plate 32 and the second mounting base plate 33.

[0042] The adjusting screw 34 and the stud assembly 35 form a push-pull structure, connecting the adjusting base plate 32 and the second mounting base plate 33. By adjusting the adjusting screw 34 and the stud assembly 35, the relative height between the adjusting base plate 32 and the second mounting base plate 33 can be adjusted to achieve the purpose of adjusting the horizontal height of the box support plate assembly 5. Specifically, first loosen the nut on the stud, then adjust the relative height between the adjusting base plate 32 and the second mounting base plate 33 to the target height by rotating the adjusting screw 34, and then tighten the nut on the stud to fix the target height.

[0043] Refer to the instruction manual appendix Figure 7 The guide positioning component 4 includes a positioning support column 41, a third mounting base plate 42, and a positioning block 43. The third mounting base plate 42 and the positioning block 43 are respectively fixedly installed at the bottom and top of the positioning support column 41. After the screw passes through the through hole provided on the third mounting base plate 42 (the through hole contains multiple evenly distributed holes, and the spacing between the through holes is a multiple of 40mm), it is screwed and fixed on the threaded hole 111 of the support plate 11, so as to realize the detachable installation of the third mounting base plate 42 and the support plate 11. After the guide positioning component 4 is translated to the target position on the support plate 11, it is locked and fixed by screws.

[0044] The positioning block 43 includes a perpendicular mounting block and a vertical plate. The vertical plate is fixedly mounted on the front end of the mounting block. An elongated hole is provided on the mounting block. After the screw passes through the elongated hole on the mounting block, it is screwed and fixed to the threaded hole on the top of the positioning support 41. The elongated hole facilitates the front and rear position of the positioning block 43 relative to the positioning support 41, so as to finely adjust the positioning position with the battery box. The upper part of the front end face of the vertical plate is a slope with a guiding function. The distance from the upper surface of the positioning block 43 to the lower surface of the third mounting base plate 42 is h1, and h1 = H.

[0045] Refer to the instruction manual appendix Figure 8 The battery case tray assembly 5 includes a tray 51 and a sealing ring 52 fixedly installed on the top edge of the tray 51. The sealing ring 52 is embedded in a groove provided on the top surface of the tray 51, or fixedly installed on the top surface of the tray 51 by adhesive. When the battery case is upside down on the tray 51, the sealing ring 52 can achieve the effect of sealing the battery case. The battery case tray assembly 5 is available in various specifications to suit different specifications of battery cases. The back edge of the tray 51 is provided with threaded holes that are fixedly connected to multiple screws on the mounting top plate 36. An air inlet 511 is provided on the tray 51. The air inlet 511 is located inside the sealing ring 52. A certain pressure of gas is injected into the battery case through the air inlet 511 connected to an airtightness tester.

[0046] Refer to the instruction manual appendix Figure 9The side-blocking assembly 6 includes a side-blocking support column 61, a fourth mounting base plate 62, and a cylinder 63. The fourth mounting base plate 62 is fixedly installed at the bottom end of the side-blocking support column 61. After the screw passes through the through hole provided on the fourth mounting base plate 62 (the through hole includes multiple evenly distributed through holes, and the spacing between the through holes is a multiple of 40mm), it is screwed and fixed on the threaded hole 111 of the support plate 11, so as to realize the detachable installation of the fourth mounting base plate 62 and the support plate 11. After the guide positioning assembly 4 of the side-blocking assembly 6 is translated to the target position on the support plate 11, it is locked and fixed by screws.

[0047] Cylinder 63 is fixedly mounted on the top of side-blocking support 61 by screws. Side-blocking block 64 is fixedly mounted on the front end of the telescopic rod of cylinder 63. The telescopic rod of cylinder 63 drives the side-blocking block 64 to move horizontally to seal the connector and prevent air leakage during airtightness testing. The side-blocking block 64 includes a rubber block support plate and a side-blocking rubber block. The rubber block support plate is fixedly mounted on the front end of the telescopic rod. The side-blocking rubber block is fixedly mounted on the front end face of the rubber block support plate by means of adhesive or matching and snapping with a slot. The distance from the upper surface of the side-blocking block 64 to the lower surface of the fourth mounting base plate 62 is h1, and h1 = H.

[0048] The aforementioned cylinder 63 can be a three-axis cylinder, or a hydraulic cylinder, electric push rod, etc. can be used as alternatives.

[0049] The airtightness testing fixture described in this patent is installed on a specific battery box as follows: First, multiple height adjustment components 3 are used to support and fix the bottom of the box support plate assembly 5 around the perimeter. After the box support plate assembly 5 is moved along the support plate 11 to the target position, the second mounting base plate 33 is fixed to the threaded hole 111 at the corresponding position on the support plate 11 with screws. The battery box is then placed upside down on the support plate 51. By adjusting the adjustment screws 34 and stud assembly 35, the relative height between the adjustment base plate 32 and the second mounting base plate 33 can be adjusted so that the height between the surface of the battery box and the surface of the support plate 11 is H.

[0050] After moving multiple guide and positioning components 4 along the support plate 11 to the target positions on the four sides of the box tray assembly 5 (making the front end of the positioning block 43 abut against the side of the battery box), the third mounting base plate 42 is fixed to the threaded hole 111 at the corresponding position on the support plate 11 with screws.

[0051] After moving multiple clamping components 2 along the support plate 11 to the target positions on the four sides of the box tray assembly 5 (when the clamping cylinder 23 drives the swing arm 25 to press down and clamp, the clamping block 27 abuts against the surface of the battery box, and at this time the distance from the lower surface of the clamping block 27 to the lower surface of the first mounting base plate 22 is h1, and h1=H), the first mounting base plate 22 is fixed to the threaded hole 111 at the corresponding position on the support plate 11 by screws.

[0052] Multiple side-blocking components 6 are moved along the support plate 11 to the front or rear side wall of the battery box, corresponding to the socket on the battery box. The side-blocking block 64 is oriented toward the socket. The fourth mounting base plate 62 is fixed to the threaded hole 111 at the corresponding position on the support plate 11 with screws.

[0053] The clamping cylinder 23 drives the swing arm 25, pressure arm 26 and pressure block 27 to move downward until the swing arm 25, pressure arm 26 and pressure block 27 swing to a horizontal clamping state, pressing the battery box onto the support plate 51; the cylinder 63 drives the side block 64 to move horizontally to seal the connector, so that the airtightness tester can inject a certain pressure of gas into the battery box through the air inlet 511, and spray bubble liquid on the weld seam of the battery box, and the airtightness test can begin.

[0054] Obviously, the above-mentioned battery box-specific airtightness testing fixture and corresponding method can be modified and / or have components added without departing from the field and scope of this utility model.

[0055] It is equally clear that although this utility model has described the dedicated airtightness testing fixture for battery boxes in detail, those skilled in the art will certainly be able to obtain many other equivalent forms of dedicated airtightness testing fixtures and corresponding methods for battery boxes, which have the features described in the claims and are therefore within the scope of protection defined herein.

Claims

1. A battery case airtightness detection tool, characterized by: The utility model provides a flexible platform (1), compaction assembly (2), height adjusting assembly (3), guide positioning assembly (4) and box pallet assembly (5), a plurality of height adjusting assembly (3) can be detachably fixed in the top surface middle part of flexible platform (1), box pallet assembly (5) is fixed in a plurality of height adjusting assembly (3) top, and box pallet assembly (5) is adjusted horizontal height through height adjusting assembly (3), a plurality of compaction assembly (2) and guide positioning assembly (4) are detachably fixed on the top surface of flexible platform (1), and are evenly distributed in the four side surfaces of box pallet assembly (5); The top surface of the battery box is open, the battery box is invertedly buckled on the top surface of the box pallet assembly (5), the battery box is positioned by the plurality of guide positioning assemblies (4), and the battery box is tightly fixed on the top surface of the box pallet assembly (5) by the plurality of compaction assemblies (2), so that the open surface is sealed.

2. The battery box airtightness detection tool of claim 1, wherein: The battery box airtightness detection tool further comprises a side plugging assembly (6) detachably fixed on the top surface of the flexible platform (1) at a position corresponding to the insertion port in the front or rear side wall of the battery box, and the side plugging assembly (6) is used for sealing the insertion port.

3. The battery box airtightness detection tool of claim 1, wherein: The flexible platform (1) comprises a support frame (12) and a support plate (11) fixed to the top end of the support frame (12), a plurality of threaded holes (111) are arranged on the support plate (11), and an identification (112) indicating the positions of X-direction and / or Y-direction threaded holes (111) is marked on the side of the outermost threaded hole (111) on the top surface of the support plate (11).

4. The battery box airtightness detection tool of claim 3, wherein: A water tank (113) is formed on the top surface of the support plate (11) and is connected to the threaded holes (111), and the support plate (11) comprises a rubber plug for plugging the threaded holes (111).

5. The battery case airtightness detection tooling of claim 1, wherein: The compaction assembly (2) comprises a compaction support (21), a first mounting bottom plate (22), a clamping air cylinder (23), a rotating shaft (24), a swing arm (25), a pressing arm (26), a pressing block (27), and a pressing arm limiting block (28). The first mounting bottom plate (22) is fixedly installed at the bottom end of the compaction support (21), and a screw is screwed and fixed on the flexible platform (1) after penetrating through the through hole provided on the first mounting bottom plate (22), thereby achieving detachable installation of the compaction assembly (2) and the flexible platform (1). The clamping air cylinder (23) is fixedly installed on the side of the compaction support (21), the swing arm (25) is installed on the clamping air cylinder (23) through the rotating shaft (24), the pressing arm (26) is fixedly installed at the bottom of one end of the swing arm (25) away from the clamping air cylinder (23), the pressing block (27) is fixedly installed at the bottom of the pressing arm (26), the clamping air cylinder (23) drives the rotating shaft (24) to rotate and drives the swing arm (25), the pressing arm (26), and the pressing block (27) to rotate around the axis of the rotating shaft (24), and the pressing arm limiting block (28) is fixedly installed at the top of the compaction support (21), and the pressing arm limiting block (28) is used for limiting the compaction degree of the pressing arm (26) and preventing the pressing block (27) from damaging the battery box.

6. The battery case airtightness detection tooling of claim 1, wherein: The height adjusting assembly (3) comprises an adjusting support (31), an adjusting bottom plate (32), a second mounting bottom plate (33), a height adjusting piece and a mounting top plate (36); the adjusting bottom plate (32) and the mounting top plate (36) are fixedly connected to the bottom end and the top end of the adjusting support (31) respectively, a screw is screwed and fixed on the bottom surface of the box supporting plate assembly (5) after penetrating through the through hole provided on the mounting top plate (36), so that the height adjusting assembly (3) and the box supporting plate assembly (5) are detachably mounted; a screw is screwed and fixed on the flexible platform (1) after penetrating through the through hole provided on the second mounting bottom plate (33), so that the height adjusting assembly (3) and the flexible platform (1) are detachably mounted. The height adjusting piece comprises an adjusting screw (34) and a stud assembly (35), the adjusting screw (34) is screwed with the threaded hole provided on the adjusting bottom plate (32), and the bottom end of the adjusting screw (34) abuts against the top surface of the second mounting bottom plate (33); the stud assembly (35) comprises a flat washer, a spring washer, a nut and a stud, the bottom end of the stud penetrates through the through hole provided on the adjusting bottom plate (32) and is fixedly connected with the second mounting bottom plate (33), and the top end of the stud is located at the top of the adjusting bottom plate (32), the flat washer and the spring washer are sleeved on the outside of the stud, and the nut is screwed on the stud.

7. The battery case airtightness detection tooling of claim 1, wherein: The guiding and positioning assembly (4) comprises a positioning support (41), a third mounting bottom plate (42) and a positioning block (43); the third mounting bottom plate (42) and the positioning block (43) are fixedly mounted at the bottom end and the top end of the positioning support (41) respectively, a screw is screwed and fixed on the flexible platform (1) after penetrating through the through hole provided on the third mounting bottom plate (42), so that the guiding and positioning assembly (4) and the flexible platform (1) are detachably mounted.

8. The battery case airtightness detection tooling of claim 7, characterized in that: The positioning block (43) comprises a mounting block and a vertical plate which are perpendicular to each other, the vertical plate is fixedly mounted at the front end of the mounting block, a long waist hole is formed on the mounting block, a screw is screwed and fixed at the top of the positioning support (41) after penetrating through the long waist hole provided on the mounting block, and the upper part of the front end surface of the vertical plate is a slope which has a guiding effect.

9. The battery case airtightness detection tooling of claim 1, wherein: The box supporting plate assembly (5) comprises a supporting plate (51) and a sealing rubber ring (52) fixedly mounted at the top edge of the supporting plate (51), and an air inlet (511) is formed on the supporting plate (51).

10. The battery case airtightness detection tooling of claim 2, wherein: The side blocking assembly (6) comprises a side blocking support (61), a fourth mounting bottom plate (62) and an air cylinder (63), the fourth mounting bottom plate (62) is fixedly mounted at the bottom end of the side blocking support (61), a screw is screwed and fixed on the flexible platform (1) after penetrating through the through hole provided on the fourth mounting bottom plate (62), so that the side blocking assembly (6) and the flexible platform (1) are detachably mounted; The air cylinder (63) is fixedly mounted at the top end of the side blocking support (61), a side blocking block (64) is fixedly mounted at the front end of the telescopic rod of the air cylinder (63), and the side blocking block (64) is driven by the telescopic rod of the air cylinder (63) to move horizontally to seal the connector port.

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