A battery pack upper cover airtightness detection device capable of being quickly assembled

Abstract

The application discloses a battery pack upper cover air tightness detection equipment capable of being quickly assembled, which comprises a rack, an air cylinder, a third sliding table, a workbench, a tooling and an air tightness detector. The air cylinder moves horizontally relative to the rack through a first sliding table and a second sliding table, the workbench is moved into or out of the air cylinder through the third sliding table, the workbench is used for carrying the battery pack upper cover and the tooling, and a gas pipeline of the air tightness detector penetrates through the workbench and communicates the gap between the workbench and the battery pack upper cover. The tooling does not need to be connected with the air cylinder, the tooling is directly buckled on the battery pack upper cover after being made according to the size of the battery pack upper cover, the air cylinder adjusts its position according to the size of the tooling, so that when the air cylinder pushes and squeezes the tooling downward, the tooling presses the flange edge of the battery pack upper cover on the workbench, the gap between the battery pack upper cover and the workbench is eliminated, then the air tightness detector inflates and keeps pressure between the battery pack upper cover and the workbench to test the air tightness of the battery pack upper cover.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing equipment, and more specifically to an airtightness testing device for a battery pack cover that can be quickly assembled with tooling. Background Technology

[0002] Currently, most airtightness testing equipment for battery pack covers is designed for a single product, resulting in high R&D and procurement costs. Furthermore, storing multiple airtightness testing devices requires specific space, and excessive stacking can easily damage the equipment, reducing usable production area within the factory and thus reducing productivity. As the company grows, the number and variety of workpieces produced increase, requiring a greater variety of airtightness testing equipment. This necessitates dedicated personnel for inspection, maintenance, and statistics, increasing labor costs. This is especially true for small-batch, multi-variety production, where multiple airtightness testing devices operate simultaneously, increasing the number of operators needed. Each operator requires training before being allowed to operate the equipment, resulting in high time and labor costs. Summary of the Invention

[0003] The purpose of this invention is to provide a battery pack cover airtightness testing device that can quickly assemble tooling, so as to solve the technical problem that existing airtightness testing devices are only applicable to one type of battery pack cover.

[0004] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0005] A battery pack cover airtightness testing device capable of rapid assembly of tooling includes: a frame, a first slide, a second slide, a cylinder, a third slide, a worktable, tooling, and an airtightness tester; the first and second slides are both horizontally arranged and perpendicular to each other; the frame, the first slide, the second slide, and the cylinder are sequentially connected so that the cylinder can perform omnidirectional horizontal movement relative to the frame, and the output end of the cylinder is downwardly arranged; the third slide is horizontally arranged and passes directly below the cylinder; the worktable is connected to the frame through the third slide; the worktable is used to support the battery pack cover and the tooling; the cylinder is used to push the tooling downward so that the tooling presses the flange edge of the battery pack cover against the worktable; the gas pipeline of the airtightness tester passes through the worktable and connects the gap between the worktable and the battery pack cover; the airtightness tester is used to inflate and maintain pressure between the battery pack cover and the worktable to test the airtightness of the battery pack cover.

[0006] Furthermore, the workbench includes a pad and a vent pipe, the vent pipe vertically passing through the pad to connect to the airtightness tester; the pad is made of an elastic material, and when the cylinder pushes the tooling downward, the gap between the pad and the flange edge is eliminated.

[0007] Furthermore, the third slide includes a first slide rail, a first slider, and a load-bearing plate. The first slide rail passes horizontally through the frame, and its two ends are located on both sides of the cylinder. The load-bearing plate is connected to the first slide rail via the first slider. There are two worktables, which are respectively installed at both ends of the load-bearing plate. The air vent pipe passes through the load-bearing plate and each of the pads to connect to the air tightness tester. The two worktables move alternately to the bottom of the cylinder.

[0008] Further, the frame includes a base plate, columns, and a top plate. The base plate and the top plate are arranged in parallel. The columns are distributed at the four corners of the base plate and vertically connect the base plate and the top plate. A tooling overlap platform is installed on the frame. The tooling overlap platform includes a second slide rail, a second slider, an overlap beam, and a first spring. There are two second slide rails, which are parallel and horizontally arranged. The two ends of each second slide rail are slidably connected to two columns. The two second slide rails are fixedly connected by a connecting rod so that the two second slide rails can move vertically and vertically synchronously. There are four second sliders. Two sliders are connected to two second slide rails in pairs; there are two overlapping beams, which are parallel and horizontally arranged. Each overlapping beam is connected to two second sliders at both ends, so that the two overlapping beams can always be parallel and close to or far from each other. The overlapping beams are provided with a plurality of overlapping grooves distributed along the length of the overlapping beams. The overlapping grooves are located on the top surface of the overlapping beams. The tooling is detachably hung on the overlapping grooves and is located below the output end of the cylinder; the first spring connects the base plate and the second slide rails, and the first spring is compressed when the second slide rails descend.

[0009] Further, the tooling includes: profiles, corner pieces, and corner brackets; the profiles are elongated; the corner brackets include two right-angled sides, the two right-angled sides of which connect to the sidewalls of two mutually perpendicular profiles, or one end of the corner bracket connects to the sidewall of the profile, and the other end of the corner bracket connects to the overlapping beam via the corner piece; the corner piece is fixedly connected to the right-angled end of the corner bracket, and the corner piece is coaxially or perpendicularly connected to the ends of multiple adjacent profiles via the corner bracket, the sidewall of the corner piece abuts against the end face of the profile; several profiles are connected by the corner piece and / or the corner bracket to form a pressing frame and a load-bearing frame, the shape of the pressing frame is the same as the shape of the flange edge, the pressing frame is used to press the flange edge from top to bottom, the load-bearing frame is installed on the top of the pressing frame, the load-bearing frame is used to bear the force of the cylinder, and the two sides of the load-bearing frame are respectively hung on the two overlapping beams.

[0010] Furthermore, the profile has a rectangular cross-section, and each sidewall of the profile has a groove extending along its length. Two opposing pressure strips are formed on the two sides of the groove near the outer surface of the profile, and a first toothed strip is formed on the side of the pressure strip facing inwards. The corner bracket includes a top cover, a floating joint, a fixed joint, and a second spring. The top cover, the floating joint, and the fixed joint are sequentially connected along a direction perpendicular to one sidewall of the profile. The top cover covers the outer surface of the profile. The floating joint is connected to the top cover by a third bolt. The top cover and the floating joint respectively clamp two sides of the pressure strip, with the floating joint facing the top cover. A second rack is formed. When the third bolt is tightened, the top cover and the floating joint approach each other, and the second rack engages with the first rack. The fixed joint is detachably connected to the profile or the corner piece, and the fixed joint is slidably connected to the floating joint. The sliding direction of the floating joint is parallel to the connection direction of the floating joint and the fixed joint. When the third bolt is not tightened, the floating joint and the fixed joint are spliced ​​to form a slide strip that slides with the slide groove. The second spring is installed between the top cover and the floating joint. The second spring is embedded in the side of the floating joint near the top cover. When the top cover and the floating joint approach each other, the second spring is compressed.

[0011] Furthermore, the top and / or bottom of the corner piece are formed with stepped holes, which penetrate the center of the corner piece along the direction of gravity; two adjacent corner pieces in the vertical direction are connected by a connecting post, which includes a coaxial first shaft segment, a second shaft segment, and a third shaft segment. The diameter of the second shaft segment is larger than the diameter of the first shaft segment, and the diameter of the first shaft segment is equal to the diameter of the second shaft segment. The first shaft segment and the third shaft segment are used to be inserted into the stepped holes and connected to the corner pieces by a first bolt. The head of the first bolt abuts against the stepped surface of one of the stepped holes, and the end face of the second shaft segment abuts against the surface of the corner piece or the stepped surface of the other stepped hole.

[0012] Furthermore, the fixed joint includes a plug-in portion, a connecting portion, and an adapter portion. The plug-in portion and the adapter portion are respectively connected to the two ends of the connecting portion. The included angle between the plug-in portion and the adapter portion is 90°. The plug-in portion is spliced ​​with the floating joint to form the slide bar. The connecting portion can slide inside the slide groove. The adapter portion is connected to the force-bearing plate through a first adapter. The force-bearing plate is a flat plate horizontally arranged between the force-bearing frame and the cylinder. The adapter portion is connected to the overlapping beam through a second adapter.

[0013] Furthermore, the first adapter is in the shape of an angle steel, and the adapter part and the first adapter are connected by a fourth bolt. The other side of the first adapter is used to connect to the load-bearing plate.

[0014] Furthermore, the second adapter is flat, and the adapter portion and the second adapter are connected by a fifth bolt. A portion of the second adapter is located on the outside of the adapter portion and forms a slot. The slot is located on the bottom surface of the second adapter and engages with the overlapping slot.

[0015] Compared with the prior art, this application has the following advantages:

[0016] A battery pack cover airtightness testing device is provided, which can quickly assemble a fixture. The fixture does not require connection to a cylinder. After the fixture is made according to the size of the battery pack cover, it is directly put on the battery pack cover. The cylinder adjusts its position according to the size of the fixture so that when the cylinder pushes the fixture downward, the fixture presses the flange edge of the battery pack cover tightly against the worktable, eliminating the gap between the battery pack cover and the worktable. Then, the airtightness tester inflates and maintains pressure between the battery pack cover and the worktable to test the airtightness of the battery pack cover. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in 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 merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a simplified mechanical diagram from the main viewpoint of Embodiment 1 of the present invention;

[0019] Figure 2 This is a simplified mechanical diagram from a top view of Embodiment 2 of the present invention;

[0020] Figure 3 This is a simplified mechanical diagram from the main viewpoint of Embodiment 3 of the present invention;

[0021] Figure 4 This is a front view of a portion of the structure of Embodiment 3 of the present invention;

[0022] Figure 5 This is an assembly drawing of the tooling and tooling overlap platform according to Embodiment 3 of the present invention, and a partial enlarged view thereof;

[0023] Figure 6 This is an assembly drawing of the pressure frame, force-bearing frame, and force-bearing plate of Embodiment 3 of the present invention, and a partial enlarged view thereof;

[0024] Figure 7 This is an assembly diagram of the pressure frame and the force-bearing frame in Embodiment 3 of the present invention;

[0025] Figure 8 This is a perspective view of the right-angle connector of Embodiment 3 of the present invention;

[0026] Figure 9 This is an assembly diagram of the right-angle connector according to Embodiment 3 of the present invention;

[0027] Figure 10 This is a side view of the right-angle connector of Embodiment 3 of the present invention;

[0028] Figure 11 for Figure 10 A cross-sectional view along the AA direction;

[0029] Figure 12 for Figure 10 A cross-sectional view along the BB direction;

[0030] Figure 13 This is an axial view of the connection structure of the profile and corner bracket in one working condition according to Embodiment 3 of the present invention. The third bolt on the corner bracket is in a loosened state.

[0031] Figure 14 for Figure 13 A cross-sectional view along the CC direction;

[0032] Figure 15 This is an axial view of the connection structure of the profile and corner bracket in another working condition according to Embodiment 3 of the present invention. The third bolt on the corner bracket is in a tightened state.

[0033] Figure 16 for Figure 15 A cross-sectional view along the DD direction;

[0034] Figure 17 for Figure 15 A cross-sectional view along the EE direction;

[0035] Figure 18 This is an assembly diagram of the corner bracket from one perspective of Embodiment 3 of the present invention;

[0036] Figure 19 This is an assembly diagram of the corner bracket from another perspective of Embodiment 3 of the present invention;

[0037] Figure 20 This is a perspective view of the T-joint of Embodiment 3 of the present invention;

[0038] Figure 21 This is a perspective view of the cross-shaped connector of Embodiment 3 of the present invention;

[0039] Figure 22 This is a perspective view of the corner bracket vertically connecting two profiles in Embodiment 3 of the present invention;

[0040] Figure 23 This is an assembly diagram of the corner bracket vertically connecting two profiles in Embodiment 3 of the present invention;

[0041] Figure 24 This is a perspective view of the corner bracket connecting the first adapter in Embodiment 3 of the present invention;

[0042] Figure 25 This is an assembly diagram of the corner bracket connection to the first adapter in Embodiment 3 of the present invention;

[0043] The labels in the diagram represent the following:

[0044] 11-Frame; 111-Base plate; 112-Column; 113-Top plate; 12-First slide; 13-Second slide; 14-Cylinder; 15-Third slide; 151-First slide rail; 152-First slider; 153-Bearing plate; 16-Workbench; 161-Padded plate; 162-Ventilation pipe; 17-Battery pack cover; 171-Flange edge; 18-Tooling overlap platform; 181-Second slide rail; 182-Connecting rod; 183-Second slider; 184-Overlap beam; 185-First spring; 186-Overlap groove;

[0045] 2-Profile; 21-Slide groove; 22-Pressure strip; 221-First toothed rack; 222-First slope;

[0046] 3-Corner fitting; 31-Stepped hole; 311-Stepped surface; 32-First bolt; 33-Slot; 34-First threaded hole; 35-Second bolt;

[0047] 4-Angle bracket; 41-Top cover; 411-First through hole; 42-Floating joint; 421-Second rack; 422-Second slope; 423-Second threaded hole; 424-Guide post; 425-Spring mounting groove; 43-Fixed joint; 431-Plug-in part; 432-Fitting part; 433-Guide hole; 434-Second through hole; 435-Connecting part; 436-Adapter part; 437-Third through hole; 44-Third bolt; 45-Second spring;

[0048] 51-Pressing frame; 52-Supporting frame; 53-Supporting plate; 54-Fourth through hole;

[0049] 6-Connecting column; 61-First shaft segment; 62-Second shaft segment; 63-Third shaft segment;

[0050] 7-Gasket; 71-Limiting hole;

[0051] 8-First adapter; 81-Third threaded hole; 82-Fourth bolt; 83-Connecting hole;

[0052] 9-Second adapter; 91-Fourth threaded hole; 92-Fifth bolt; 93-Slot. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] The following is an exemplary embodiment of a battery pack cover airtightness testing device that can quickly assemble tooling.

[0055] Example 1, please refer to Figure 1 .

[0056] The battery pack cover airtightness testing equipment includes: frame 11, first slide 12, second slide 13, cylinder 14, third slide 15, worktable 16, tooling and airtightness tester;

[0057] The first slide 12 and the second slide 13 are both horizontally arranged and perpendicular to each other. The frame 11, the first slide 12, the second slide 13 and the cylinder 14 are connected in sequence so that the cylinder 14 can perform omnidirectional horizontal movement relative to the frame 11. The output end of the cylinder 14 is set downward.

[0058] The third slide 15 is horizontally positioned and passes directly below the cylinder 14. The worktable 16 is connected to the frame 11 via the third slide 15. The worktable 16 is used to support the battery pack cover 17 and the tooling. The cylinder 14 is used to push the tooling downward so that the tooling presses the flange edge 171 of the battery pack cover 17 onto the worktable 16. The gas pipeline of the airtightness tester passes through the worktable 16 and connects the gap between the worktable 16 and the battery pack cover 17. The airtightness tester is used to inflate and maintain pressure between the battery pack cover 17 and the worktable 16 to test the airtightness of the battery pack cover 17.

[0059] Specifically:

[0060] The tooling is not connected to cylinder 14, and the airtightness tester is not shown in the diagram.

[0061] The position of cylinder 14 can be adjusted according to the size of the tooling. When necessary, the position of cylinder 14 can be adjusted by adjusting the first slide 12 and the second slide 13.

[0062] The workbench 16 includes a pad 161 and a vent pipe 162. The vent pipe 162 vertically passes through the pad 161 to connect to the air tightness tester. The pad 161 is made of EVA foam. When the cylinder 14 pushes the tooling downward, the gap between the pad 161 and the flange edge 171 is eliminated.

[0063] The advantages of the above-mentioned device are:

[0064] In small-batch production, the tooling is designed according to the shape of the battery pack cover 17. During testing, the battery pack cover 17 is placed on the workbench 16, and then the tooling is placed on the battery pack cover 17 so that the tooling presses against the flange edge 171 of the battery pack cover 17. Then the position of the cylinder 14 is adjusted so that the cylinder 14 can act precisely on the top surface of the tooling.

[0065] Test parameters: Test pressure is 3-4.5 kPa; inflation time is 60 seconds, pressure holding time is 60 seconds, result display time is 60 seconds, and a test result below 50 Pa is considered unqualified.

[0066] Furthermore:

[0067] In Example 1, the time required to replace the specifications and tooling of the battery pack cover 17 is relatively long. In order to shorten the relevant time and increase production efficiency.

[0068] Example 2, please refer to Figure 2 .

[0069] The third slide 15 includes a first slide rail 151, a first slider 152 and a load-bearing plate 153. The first slide rail 151 passes horizontally through the frame 11. The two ends of the first slide rail 151 are located on both sides of the cylinder 14. The load-bearing plate 153 is connected to the first slide rail 151 through the first slider 152. The worktable 16 has two load-bearing plates and is installed at both ends of the load-bearing plate 153.

[0070] The third slide 15 is powered by a cylinder, and the load-bearing plate 153 is driven by the cylinder to move back and forth between the two ends of the first slide rail 151. Each worktable 16 can hold a battery pack cover 17 and a tooling. When one battery pack cover 17 and its tooling are located directly below the cylinder 14 and an airtightness test is performed, the other battery pack cover 17 and its tooling are located at the far end of the frame 11, allowing the operator to replace the battery pack cover 17 or replace the battery pack cover 17 and its tooling.

[0071] Ventilation pipe 162 connects both pad 161 and load-bearing plate 153.

[0072] Furthermore:

[0073] In Examples 1 and 2, the tooling lacks fixing measures. During the airtightness test, the tooling is prone to misalignment with the flange edge 171, leading to airtightness failure.

[0074] To solve the above problems, please refer to Example 3. Figure 3 and 4 .

[0075] The frame 11 includes a base plate 111, columns 112 and a top plate 113. The base plate 111 and the top plate 113 are arranged in parallel. The columns 112 are distributed at the four corners of the base plate 111 and vertically connect the base plate 111 and the top plate 113.

[0076] The frame 11 is equipped with a tooling overlap platform 18, which includes a second slide rail 181, a second slider 183, an overlap beam 184, and a first spring 185.

[0077] There are two second slide rails 181, which are parallel and horizontally arranged. The two ends of each second slide rail 181 are slidably connected to two columns 112 respectively. The two second slide rails 181 are fixedly connected by a connecting rod 182 so that the two second slide rails 181 can rise and fall vertically synchronously.

[0078] There are four second sliders 183, and the four second sliders 183 are connected to two second slide rails 181 in pairs.

[0079] There are two overlapping beams 184, which are parallel and horizontally arranged. Each overlapping beam 184 has two second sliders 183 connected to its two ends, so that the two overlapping beams 184 can always be parallel and close to or far from each other. The overlapping beams 184 are provided with a number of overlapping grooves 186 distributed along the length of the overlapping beams 184. The overlapping grooves 186 are located on the top surface of the overlapping beams 184. The tooling is detachably hung on the overlapping grooves 186. The tooling is located below the output end of the cylinder 14.

[0080] The first spring 185 connects the base plate 111 and the second slide rail 181. When the second slide rail 181 descends, the first spring 185 is compressed.

[0081] The tooling is directly suspended below 113 and cylinder 14 via the lap beam 184. The tooling does not need to be connected to cylinder 14. When cylinder 14 drives the tooling to descend, the spring is compressed. Since the tooling rises and falls along the axis of column 112, the tooling will not shift during repeated rises and falls, and there will be no problem of misalignment between the tooling and flange edge 171.

[0082] The lap groove 186 is used to connect the tooling to prevent the tooling from sliding on the lap beam 184.

[0083] Furthermore:

[0084] In Examples 1, 2, and 3, the tooling that can be manufactured quickly is of particular importance, as the production speed of the tooling determines the inspection efficiency of the battery pack cover 17.

[0085] The following are exemplary embodiments of the tooling; please refer to them. Figure 3-6 .

[0086] The tooling includes: profile 2, corner piece 3, and corner bracket 4;

[0087] Profile 2 is a long strip shape;

[0088] The corner bracket 4 has two right-angled sides, which connect to the sidewalls of two mutually perpendicular profiles 2. Alternatively, one end of the corner bracket 4 is connected to the sidewall of the profile 2, and the other end of the corner bracket 4 is connected to the overlapping beam 184 via the corner piece 3.

[0089] The corner piece 3 is fixedly connected to the right-angle end of the corner bracket 4. The corner piece 3 is coaxially or perpendicularly connected to the ends of multiple adjacent profiles 2 through the corner bracket 4. The side wall of the corner piece 3 abuts against the end face of the profile 2.

[0090] Several profiles 2 are connected by corner pieces 3 and / or corner brackets 4 to form a pressing frame 51 and a load-bearing frame 52. The shape of the pressing frame 51 is the same as that of the flange edge 171. The pressing frame 51 is used to press the flange edge 171 from top to bottom. The load-bearing frame 52 is installed on the top of the pressing frame 51. The load-bearing frame 52 is used to bear the force of the cylinder 14. The two sides of the load-bearing frame 52 are respectively hung on two overlapping beams 184.

[0091] Profile 2 is made of 40mm*40mm aluminum alloy with a thickness of 3mm. The specific thickness is selected according to the test pressure of the product. The surface of profile 2 is treated with electrophoresis or anodizing. Several profiles 2 are cut into different lengths according to the style of the battery pack cover 17 being tested. Then, multiple profiles 2 are connected coaxially or perpendicularly through corner pieces 3 to form right angle, T-shaped or cross corner pieces 3, and finally form the pressure frame 51 and the force support frame 52.

[0092] If necessary, threads can be tapped on the central hole and concave surface of the aluminum alloy profile 2 section. At the same time, one or more stainless steel plates can be installed on the convex surface of different aluminum alloy profiles 2 by welding, and holes can be drilled and threads tapped at appropriate positions on the steel plates so that they can be connected to the cylinder barrel of the cylinder 14 by bolts.

[0093] After the tooling is connected to the frame 11, the tooling can be raised and lowered vertically under the drive of the cylinder 14.

[0094] Optional:

[0095] Since the connections between the various profiles 2 are basically made by self-tapping screws, bolts or welding, once the tooling is assembled, it is difficult to adjust the errors in the dimensions, angles and parallelism of the profiles 2 and the flange edge 171, and rework requires a lot of time.

[0096] in:

[0097] Profile 2, which is connected by self-tapping screws or bolts, will have its pre-formed threaded holes and bolt holes affected by secondary drilling.

[0098] Because of the high welding temperature, the ends of the profiles 2 are deformed, resulting in large internal stress between the profiles 2. Once the welded part is cut off, the included angle between the remaining profiles 2 will change, and the shape of the overall tooling will be difficult to restore to its original shape.

[0099] To solve the above technical problems, please refer to Figure 8-19 .

[0100] The profile 2 has a rectangular cross-section. Each sidewall of the profile 2 is formed with a groove 21 extending along the length of the profile 2. Two sides of the groove 21 near the outer surface of the profile 2 are formed with opposing pressure strips 22. The side of the pressure strip 22 facing the interior of the profile 2 is formed with a first toothed strip 221.

[0101] Corner bracket 4 includes: top cover 41, floating joint 42, and fixed joint 43;

[0102] Along a direction perpendicular to one side wall of profile 2, the top cover 41, floating joint 42, and fixed joint 43 are connected in sequence;

[0103] in,

[0104] The top cover 41 is used to cover the outer surface of the profile 2;

[0105] The floating joint 42 is connected to the upper cover 41 by the third bolt 44. The upper cover 41 and the floating joint 42 respectively clamp the two sides of the pressure strip 22. The side of the floating joint 42 near the upper cover 41 forms a second toothed rack 421. When the third bolt 44 is tightened, the upper cover 41 and the floating joint 42 move closer to each other, and the second toothed rack 421 is inserted into the first toothed rack 221 so that the floating joint 42 is rubbed against the profile 2.

[0106] The fixed joint 43 is detachably connected to the profile 2 or the corner piece 3, and the fixed joint 43 is slidably connected to the floating joint 42. The sliding direction of the floating joint 42 is parallel to the connection direction of the floating joint 42 and the fixed joint 43. When the third bolt 44 is not tightened, the floating joint 42 and the fixed joint 43 are spliced ​​together to form a sliding strip that slides in cooperation with the slide groove 21.

[0107] The sidewall of profile 2 refers to the wall surface other than the end face of profile 2. Profile 2 is formed by aluminum alloy extrusion process, and the first toothed rack 221 is formed by toothing machine.

[0108] During the assembly process, first connect the corner piece 3 and the corner bracket 4 according to the requirements to form a right angle, T-shape or cross corner piece 3. Then, insert the profile 2 and the corner bracket 4, that is, insert the floating joint 42 and the fixed joint 43 into the slide groove 21. Then tighten the third bolt 44 so that the top cover 41 and the floating joint 42 clamp the pressure strip 22, thus completing the assembly of the tooling.

[0109] Then check whether the tooling is qualified, that is, check whether the profile 2 can press the flange edge 171 just right. If the length of the profile 2 is inaccurate, loosen the third bolt 44, remove the profile 2 from the corner bracket 4, recut it and reinstall it. In this way, the pressure frame 51 and the load-bearing frame 52 can be easily and quickly disassembled and assembled.

[0110] It should also be noted that:

[0111] If the floating joint 42 is removed and the pressure strip 22 is clamped only by the upper cover 41 and the fixed joint 43, the distance between the profile 2 and the profile 2 or between the profile 2 and the corner piece 3 will change when the third bolt 44 is tightened, which will cause a large internal stress between the profile 2 and the profile 2 or between the profile 2 and the corner piece 3. Therefore, the floating joint 42 is necessary.

[0112] Furthermore:

[0113] The corner piece 3 is cubic in shape. Each corner of the corner piece 3 is formed around the same center line and has a slot 33. The slot 33 has a first threaded hole 34. The corner piece 4 is connected to the first threaded hole 34 by a second bolt 35.

[0114] Optionally, the corner bracket 4 has a variety of different specifications. One type of corner bracket 4 is used to connect one profile 2 and corner piece 3, while another type of corner bracket 4 is used to connect two profiles 2 and corner piece 3. The difference is specifically reflected in the structure of the fixing joint 43.

[0115] First, please refer to Figure 8-12 :

[0116] The fixed connector 43 includes a plug-in portion 431 and a fitting portion 432. The fitting portion 432 is obliquely connected to one end of the plug-in portion 431. The angle between the plug-in portion 431 and the fitting portion 432 is 45°. The plug-in portion 431 and the floating connector 42 are spliced ​​to form the slide bar. The fitting portion 432 is fitted into the slot 33. A second through hole 434 is formed on the fitting portion 432. The second through hole 434 and the first threaded hole 34 are connected by a second bolt 35.

[0117] Secondly, please refer to Figure 20and 21 .

[0118] The fixed connector 43 includes a plug-in portion 431 and a fitting portion 432. There are two plug-in portions 431, which are respectively connected to the two ends of the fitting portion 432. The included angle between the two plug-in portions 431 is 90°. Each plug-in portion 431 is spliced ​​with a floating connector 42 to form the slide bar. The fitting portion 432 is fitted into the slot 33. A second through hole 434 is formed on the fitting portion 432. The second through hole 434 and the first threaded hole 34 are connected by a second bolt 35.

[0119] Further, please refer to Figure 17 :

[0120] Each tooth of the first rack 221 has a first slope 222 on the side closest to the first direction, and the first direction is parallel to the length direction of the first rack 221.

[0121] Each tooth of the second rack 421 has a second slope 422 formed on the side closest to the second direction. The second direction is parallel to the length direction of the second rack 421, and the first direction and the second direction are opposite.

[0122] When the first rack 221 and the second rack 421 mesh with each other, the first slope 222 and the second slope 422 provide guiding slopes for the two to mesh with each other, so as to reduce the difficulty of the two meshing with each other.

[0123] Further, please refer to Figure 18 , 19 :

[0124] The upper cover 41 has a first through hole 411 for the third bolt 44 to pass through, and the floating joint 42 has a second threaded hole 423 for the third bolt 44 to be threadedly connected. The third bolt 44 passes through the first through hole 411 and is threadedly connected to the second threaded hole 423.

[0125] Further, please refer to Figure 14 , 16 :

[0126] The second threaded hole 423 is coaxial with the guide post 424, and the second threaded hole 423 passes through the floating joint 42 and the guide post 424.

[0127] Optional:

[0128] During the process of loosening the third bolt 44 and inserting the floating joint 42 and the fixed joint 43 into the slide groove 21, it is also necessary to lift the upper cover 41 to separate it from the floating joint 42. Otherwise, the upper cover 41 will collide with the pressure strip 22, making it difficult to insert the profile 2 and the corner bracket 4.

[0129] To solve the above technical problems, please refer to Figure 14 , 16 .

[0130] A second spring 45 is installed between the top cover 41 and the floating joint 42. The second spring 45 is embedded in the side of the floating joint 42 near the top cover 41. When the top cover 41 and the floating joint 42 approach each other, the second spring 45 is compressed.

[0131] Further, please refer to Figure 14 , 16 :

[0132] The floating joint 42 has a second spring 45 mounting groove (425) recessed toward the fixed joint 43 on the side near the upper cover 41. The second threaded hole 423, the guide post 424 and the second spring 45 mounting groove (425) are coaxial.

[0133] Before tightening the third bolt 44, when the slide bar formed by the floating joint 42 and the fixed joint 43 is inserted into the slide groove 21 or slides inside the slide groove 21, under the action of the rebound force of the second spring 45, the upper cover 41 is always away from the floating joint 42 and does not contact the pressure strip 22.

[0134] Further, please refer to Figure 7-12 ,exist Figure 8-12 Only half of the middle connecting column 6 is displayed.

[0135] The corner piece 3 has a stepped hole 31 formed at the top and / or bottom, and the stepped hole 31 passes through the center of the corner piece 3 along the direction of gravity;

[0136] A connecting post 6 is installed on the corner piece 3. The connecting post 6 includes a coaxial first shaft segment 61, a second shaft segment 62, and a third shaft segment 63. The diameter of the second shaft segment 62 is larger than the diameter of the first shaft segment 61, and the diameter of the first shaft segment 61 is equal to the diameter of the second shaft segment 62. The first shaft segment 61 and the third shaft segment 63 are used to be inserted into the stepped hole 31 and connected to the corner piece 3 by a first bolt 32. The head of the first bolt 32 abuts against the stepped surface 311 of one stepped hole 31, and the end face of the second shaft segment 62 abuts against the surface of the corner piece 3 or the stepped surface 311 of another stepped hole 31.

[0137] The connecting column 6 is used to vertically connect the two corner pieces 3 so that the pressure frame 51 can be suspended directly below the force-bearing frame 52. The connecting column 6 can also be used as a sliding column to guide the vertical lifting and lowering of the tooling.

[0138] Further, please refer to Figure 22 and 23 .

[0139] To improve the assembly speed of the tooling, the number of corner brackets 3 needs to be appropriately reduced. In this case, in the parts where corner brackets 3 are not needed to connect the frame 11, two profiles 2 can be directly connected using corner brackets of the third specification 4, as described below:

[0140] The fixed connector 43 includes a plug-in portion 431 and a connecting portion 435. There are two plug-in portions 431, which are respectively connected to the two ends of the connecting portion 435. The included angle between the two plug-in portions 431 is 90°. Each plug-in portion 431 is spliced ​​with a floating connector 42 to form the slide bar. The connecting portion 435 can slide inside the slide groove 21.

[0141] The fixed joint 43 connects the end of one profile 2 to the side wall of another profile 2, thereby directly forming a T-shaped or cross-shaped corner piece 3 without the participation of the corner piece 3.

[0142] Furthermore, if an error occurs during the cutting of profile 2, resulting in profile 2 being shorter than expected, it can be compensated for in the following ways:

[0143] The tooling also includes a gasket 7 installed between profiles 2 or between profiles 2 and corner piece 3, with limiting holes 71 formed on the gasket 7 for two fixed joints 43 to pass through.

[0144] The thickness and number of gaskets 7 can be selected as needed. The limiting hole 71 is used to limit the position of the gaskets 7 and prevent the gaskets 7 from sliding.

[0145] Further, please refer to Figure 24 and 25 .

[0146] When the dimensions of the tooling change, the length and position of each profile 2 on the pressing frame 51 will also change. In order for the cylinder 14 to act on the pressing frame 51, the position of the cylinder 14 needs to be adjusted. However, adjusting the position of the cylinder 14 can easily cause the pipeline to loosen. To solve this problem, the fourth type of corner bracket 4 is provided below. Its difference from the other three types of corner bracket 4 is that the shape of the fixed joint 43 is different.

[0147] The fixed connector 43 includes a plug-in part 431, a connecting part 435, and an adapter part 436. The plug-in part 431 and the adapter part 436 are respectively connected to the two ends of the connecting part 435. The included angle between the plug-in part 431 and the adapter part 436 is 90°. The plug-in part 431 is spliced ​​with the floating connector 42 to form the slide bar. The connecting part 435 can slide inside the slide groove 21. A third through hole 437 is formed on the adapter part 436.

[0148] The adapter 436 is connected to the load-bearing plate 53 via the first adapter 8, or the adapter 436 is connected to the lap beam 184 via the second adapter 9.

[0149] For the first usage method of adapter 436, please refer to... Figure 5 .

[0150] The first adapter 8 is in the shape of an angle steel. One side of the first adapter 8 has a third threaded hole 81. The third threaded hole 81 and the third through hole 437 are connected by a fourth bolt 82. The other side of the first adapter 8 has a connecting hole 83. The connecting hole 83 is used to connect the force plate 53. The force plate 53 is a flat plate that is horizontally set directly below the cylinder 14.

[0151] The output end of cylinder 14 outputs force to force plate 53. Force plate 53 is a flat plate with four through holes 54. Force plate 53 is connected to first adapter 8 by bolts. Different force frames 52 can be connected to the same force plate 53. It is only necessary to slide angle bracket 4 to align the connection hole 83 of first adapter 8 with the fourth through hole 54 on force frame 52. Since force plate 53 does not need to be replaced, the position of cylinder 14 does not need to be adjusted.

[0152] For the first usage method of adapter 436, please refer to... Figure 6 .

[0153] The second adapter 9 is flat. A fourth threaded hole 91 is formed on one side of the second adapter 9. The fourth threaded hole 91 and the third through hole 437 are connected by a fifth bolt 92. A part of the second adapter 9 is located outside the adapter part 436 and has a slot 93. The slot 93 is located on the bottom surface of the second adapter 9 and engages with the overlapping groove 186.

[0154] When the slot 93 and the lap joint 186 fail to align and engage, slide the corner bracket 4 corresponding to the slot 93, or slide the lap joint beam 184.

[0155] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. A battery pack cover airtightness testing device capable of rapid assembly of tooling. Its features are, include: Frame (11), first slide (12), second slide (13), cylinder (14), third slide (15), worktable (16), tooling and airtightness tester; The first slide (12) and the second slide (13) are both horizontally arranged and perpendicular to each other. The frame (11), the first slide (12), the second slide (13) and the cylinder (14) are connected in sequence so that the cylinder (14) can perform omnidirectional horizontal movement relative to the frame (11). The output end of the cylinder (14) is set downward. The third slide (15) is horizontally positioned and passes directly below the cylinder (14). The worktable (16) is connected to the frame (11) via the third slide (15). The worktable (16) is used to support the battery pack cover (17) and the tooling. The cylinder (14) is used to push the tooling downward so that the tooling presses the flange edge (171) of the battery pack cover (17) onto the worktable (16). The gas pipeline of the airtightness tester passes through the worktable (16) and connects the gap between the worktable (16) and the battery pack cover (17). The airtightness tester is used to inflate and pressurize between the battery pack cover (17) and the worktable (16) to test the airtightness of the battery pack cover (17). The tooling includes: profile (2), corner piece (3) and corner bracket (4); Several of the profiles (2) are connected by the corner pieces (3) and / or the corner brackets (4) to form a pressing frame (51) and a support frame (52). The pressing frame (51) has the same shape as the flange edge (171). The pressing frame (51) is used to press the flange edge (171) from top to bottom. The support frame (52) is installed on the top of the pressing frame (51). The profile (2) has a rectangular cross-section. Each sidewall of the profile (2) is formed with a groove (21) extending along the length of the profile (2). Two opposing pressure strips (22) are formed on the two sides of the groove (21) near the outer surface of the profile (2). A first toothed strip (221) is formed on the side of the pressure strip (22) facing the inside of the profile (2). The corner bracket (4) includes: a top cover (41), a floating joint (42), a fixed joint (43), and a second spring (45); Along a direction perpendicular to one sidewall of the profile (2), the top cover (41), the floating joint (42), and the fixed joint (43) are connected in sequence; in, The top cover (41) is used to cover the outer surface of the profile (2); The floating joint (42) is connected to the upper cover (41) by a third bolt (44). The upper cover (41) and the floating joint (42) respectively clamp the two sides of the pressure strip (22). The side of the floating joint (42) near the upper cover (41) has a second toothed rack (421). When the third bolt (44) is tightened, the upper cover (41) and the floating joint (42) move closer to each other, and the second toothed rack (421) meshes with the first toothed rack (221). The fixed joint (43) is detachably connected to the profile (2) or the corner piece (3), and the fixed joint (43) is slidably connected to the floating joint (42). The sliding direction of the floating joint (42) is parallel to the connection direction of the floating joint (42) and the fixed joint (43). When the third bolt (44) is not tightened, the floating joint (42) and the fixed joint (43) are spliced ​​together to form a sliding strip that slides in cooperation with the sliding groove (21). The second spring (45) is installed between the upper cover (41) and the floating joint (42). The second spring (45) is embedded in the side of the floating joint (42) near the upper cover (41). When the upper cover (41) and the floating joint (42) are close to each other, the second spring (45) is compressed.

2. The battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 1, characterized in that, The workbench (16) includes a pad (161) and a ventilation pipe (162), the ventilation pipe (162) being vertically connected to the pad (161) to connect to the air tightness tester; The pad (161) is made of an elastic material, and when the cylinder (14) pushes the tooling downward, the gap between the pad (161) and the flange edge (171) is eliminated.

3. The battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 2, characterized in that, The third slide (15) includes a first slide rail (151), a first slider (152) and a load-bearing plate (153). The first slide rail (151) passes horizontally through the frame (11). The two ends of the first slide rail (151) are located on both sides of the cylinder (14). The load-bearing plate (153) is connected to the first slide rail (151) through the first slider (152). The workbench (16) has two and is installed at both ends of the load-bearing plate (153). The air duct (162) passes through the load-bearing plate (153) and each of the pads (161) to connect to the air tightness tester. The two workbench (16) move alternately to the bottom of the cylinder (14).

4. A battery pack cover airtightness testing device capable of rapid assembly of tooling according to any one of claims 1-3, characterized in that, The frame (11) includes a base plate (111), columns (112) and a top plate (113). The base plate (111) and the top plate (113) are arranged in parallel. The columns (112) are distributed at the four corners of the base plate (111) and vertically connect the base plate (111) and the top plate (113). The frame (11) is equipped with a tooling overlap platform (18), which includes a second slide rail (181), a second slider (183), an overlap beam (184), and a first spring (185). There are two second slide rails (181), which are parallel and horizontally arranged. The two ends of each second slide rail (181) are slidably connected to the two columns (112) respectively. The two second slide rails (181) are fixedly connected by a connecting rod (182) so that the two second slide rails (181) can move vertically up and down synchronously. There are four second sliders (183), and the four second sliders (183) are connected in pairs to two second slide rails (181). There are two overlapping beams (184), which are parallel and horizontally arranged. Each of the two ends of the overlapping beam (184) is connected to two second sliders (183) so that the two overlapping beams (184) can always be parallel and close to or far from each other. The overlapping beam (184) is provided with a plurality of overlapping grooves (186) distributed along the length direction of the overlapping beam (184). The overlapping grooves (186) are located on the top surface of the overlapping beam (184). The tooling is detachably hung on the overlapping grooves (186). The tooling is located below the output end of the cylinder (14). The first spring (185) connects the base plate (111) and the second slide rail (181), and the first spring (185) is compressed when the second slide rail (181) descends.

5. The battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 4, characterized in that, The profile (2) is a long strip shape; The corner bracket (4) includes two right-angled sides. The two right-angled sides of the corner bracket (4) are connected to the sidewalls of the two perpendicular profiles (2). Alternatively, one end of the corner bracket (4) is connected to the sidewall of the profile (2), and the other end of the corner bracket (4) is connected to the overlapping beam (184) through the corner piece (3). The corner piece (3) is fixedly connected to the right-angle end of the corner bracket (4). The corner piece (3) is coaxially or perpendicularly connected to the ends of multiple adjacent profiles (2) through the corner bracket (4). The side wall of the corner piece (3) abuts against the end face of the profile (2). The force-bearing frame (52) is used to bear the force of the cylinder (14), and the two sides of the force-bearing frame (52) are respectively hung on the two overlapping beams (184).

6. The battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 1, characterized in that, The corner piece (3) has a stepped hole (31) formed at its top and / or bottom, and the stepped hole (31) passes through the center of the corner piece (3) along the direction of gravity. Two adjacent corner pieces (3) in the vertical direction are connected by a connecting post (6), which includes a coaxial first shaft segment (61), a second shaft segment (62), and a third shaft segment (63). The diameter of the second shaft segment (62) is greater than the diameter of the first shaft segment (61), and the diameter of the first shaft segment (61) is equal to the diameter of the second shaft segment (62). The first shaft segment (61) and the third shaft segment (63) are used to be inserted into the stepped hole (31) and connected to the corner piece (3) by a first bolt (32). The head of the first bolt (32) abuts against the stepped surface (311) of one of the stepped holes (31), and the end face of the second shaft segment (62) abuts against the surface of the corner piece (3) or the stepped surface (311) of the other stepped hole (31).

7. The battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 4, characterized in that, The fixed connector (43) includes a plug-in part (431), a connecting part (435), and an adapter part (436). The plug-in part (431) and the adapter part (436) are respectively connected to the two ends of the connecting part (435). The included angle between the plug-in part (431) and the adapter part (436) is 90°. The plug-in part (431) is spliced ​​with the floating connector (42) to form the slide bar. The connecting part (435) can slide inside the slide groove (21). The adapter (436) is connected to the force plate (53) via the first adapter (8). The force plate (53) is a flat plate horizontally arranged between the force frame (52) and the cylinder (14). The adapter (436) is connected to the lap beam (184) via a second adapter (9).

8. The battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 7, characterized in that, The first adapter (8) is in the shape of an angle steel. The adapter (436) and the first adapter (8) are connected by a fourth bolt (82). The other side of the first adapter (8) is used to connect the load-bearing plate (53).

9. A battery pack cover airtightness testing device capable of rapid assembly of tooling according to claim 7, characterized in that, The second adapter (9) is flat. The adapter (436) and the second adapter (9) are connected by a fifth bolt (92). A part of the second adapter (9) is located outside the adapter (436) and has a slot (93). The slot (93) is located on the bottom surface of the second adapter (9) and engages with the overlapping groove (186).

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