Airtightness detection device and airtightness detection method thereof

Abstract

The present invention discloses an airtight detection device and an airtight detection method thereof, wherein the airtight detection device provides a special device for airtight detection of the upper cover of a battery pack PACK, which forms a sealable cavity with the upper cover of the battery pack PACK by setting a workpiece sealing mold, and ensures the position accuracy of the workpiece sealing mold by a positioning structure, and combines an edge sealing mechanism and an anti-deformation mechanism to ensure the sealing and prevent the upper cover of the battery pack PACK from deforming during detection, thereby creating reliable conditions for airtight detection, and can effectively perform airtight detection of the upper cover of the battery pack PACK, providing a basic guarantee for improving the sealing of the battery pack.

Description

Technical Field

[0001] The present invention relates to the field of battery processing equipment, and in particular to an airtightness detection device and an airtightness detection method for detecting the sealing performance of a battery pack PACK upper cover. Background Art

[0002] With the rapid development of new energy vehicles, battery packs, as core components of new energy vehicles, have attracted more and more attention from companies.

[0003] In the battery pack production process, the sealing and waterproof performance of the battery pack is an important safety requirement. Battery packs in certain layout positions have strict protection level requirements. For example, the battery pack arranged at the bottom has a sealing level of IP67. When the sealing of the battery pack does not meet the requirements, dust, moisture and even water leakage will occur in the battery pack. These situations will cause damage to the battery system, and more seriously, may cause safety accidents.

[0004] The sealing performance of the battery pack PACK shell (including the battery pack PACK upper cover and the battery pack PACK lower cover) itself is the key factor affecting the sealing of the battery pack. Therefore, it is very important to test the sealing performance of the battery pack PACK shell. Therefore, it is necessary to conduct sealing tests on the battery pack PACK upper cover and the battery pack PACK lower shell respectively. However, at present, few manufacturers test the battery pack PACK shell, and even fewer have dedicated equipment for corresponding testing. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems existing in the prior art and to provide an airtight detection device and an airtight detection method thereof.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] Airtightness detection device, used for airtightness detection of battery pack PACK cover, including

[0008] A cart, comprising a movable body and a tray on the body, wherein a workpiece sealing mold is detachably arranged on the tray;

[0009] A lifting device can apply a lifting force to the cart moved thereon to lift the cart to a target height;

[0010] The pallet positioning mechanism has a structure for horizontally positioning the pallet of the cart on the jacking device;

[0011] The trolley fixing mechanism has a structure for fixing the position of the trolley on the jacking device;

[0012] An edge sealing mechanism having a structure for applying pressure to the edge of the upper cover of the battery pack PACK on the tray;

[0013] The anti-deformation mechanism has a structure for applying pressure to different positions of the top of the upper cover of the battery pack PACK on the tray.

[0014] Preferably, in the airtight detection device, the tray includes a pair of first positioning blocks and at least two pairs of second positioning blocks, each pair of second positioning blocks and the first positioning blocks form a positioning space for limiting the workpiece sealing mold, and the plurality of positioning spaces can accommodate workpiece sealing molds of different sizes.

[0015] Preferably, in the airtight detection device, the lifting device includes a lifting bracket, the lifting bracket is movably disposed on a first guide rail extending longitudinally, a group of rollers are disposed on the lifting bracket, each of the rollers is disposed on a driving block, the driving block includes an inclined surface and a plane connected to the top of the inclined surface, and is connected to a lifting cylinder that drives it to translate, and the extension direction of the cylinder axis of the lifting cylinder is perpendicular to the axis of the first guide rail and the roller.

[0016] Preferably, in the airtight detection device, the tray positioning mechanism includes a positioning pin corresponding to the positioning ring at the bottom of the tray, and the positioning pin is connected to a cylinder that drives the positioning pin to rise and fall.

[0017] Preferably, in the airtight detection device, a support plate is provided on the positioning pin, a cushion block can be moved from the outside of the support plate to the bottom of the support plate and provide supporting force thereto, and the cushion block is connected to a translation cylinder that drives its translation.

[0018] Preferably, in the airtight detection device, the edge sealing mechanism includes a group of clamps distributed in a C shape, each of the clamps includes a rotating cylinder, the rotating cylinder is connected to a swing arm, and a pressure head is provided at the front end of the swing arm.

[0019] Preferably, in the airtight detection device, the anti-deformation mechanism includes a bracket, which is movable between a first position and a second position. At the first position, the bracket is located outside the trolley on the jacking device, and at the second position, the bracket is located above the trolley on the jacking device. A plurality of downward pressing mechanisms are provided on the bracket.

[0020] Preferably, the airtightness detection device further comprises a tray fixing mechanism, which can apply pressures towards each other on two sides of the tray.

[0021] Preferably, in the airtight detection device, the tray positioning mechanism, the cart fixing mechanism, the edge sealing mechanism and the anti-deformation mechanism are arranged on a base, a protective cover is provided on the base, a space for the cart to enter is formed on the base, a door opposite to the position of the space is provided on the side of the protective cover, an opening is formed on the top of the protective cover, the opening at least covers the tray on the cart located in the space, and a sliding door that can be opened and closed automatically is provided at the opening.

[0022] The airtightness detection method comprises at least the following steps:

[0023] S1, place the workpiece sealing mold matching the upper cover of the battery pack PACK on the tray of the cart and position it;

[0024] S2, the side door of the protective cover is opened, and the cart is pushed onto the lifting device;

[0025] S3, the lifting device lifts the cart to the target height;

[0026] S4, the pallet positioning mechanism positions the pallet;

[0027] S5, the cart fixing mechanism fixes the cart;

[0028] S6, the sliding door on the top of the protective cover is opened, the upper cover of the battery pack PACK is transferred to the workpiece sealing mold, and the sliding door is closed;

[0029] S7, the sealing mechanism applies pressure to different positions of the edge of the upper cover of the battery pack PACK;

[0030] S8, the anti-deformation mechanism translates to above the upper cover of the battery pack PACK and applies different pressures to the top of the upper cover of the battery pack PACK.

[0031] The advantages of the technical solution of the present invention are mainly reflected in:

[0032] The present solution provides a special device for testing the upper cover of a battery pack PACK, which forms a sealable cavity with the upper cover of the battery pack PACK by providing a workpiece sealing mold, and ensures the position accuracy of the workpiece sealing mold through a positioning structure, and combines an edge sealing mechanism and an anti-deformation mechanism to ensure the sealing and prevent the upper cover of the battery pack PACK from deforming during testing, thereby creating reliable conditions for airtight testing, and can effectively perform airtight testing of the upper cover of the battery pack PACK, providing a guarantee for improving the sealing of the battery pack.

[0033] The tray design of this solution can meet the placement requirements of battery pack PACK covers of various sizes. Combined with the design of the corresponding edge sealing mechanism and anti-deformation mechanism, it can effectively meet the testing requirements of battery pack PACK covers of different sizes. In addition, the use of a cart facilitates the replacement of the workpiece sealing mold, which is more flexible and convenient to use.

[0034] The jacking device of this scheme adopts inclined drive and plane support to provide supporting force, which can effectively avoid the jacking cylinder from being subjected to pressure during testing, which is beneficial to improving the reliability of jacking and avoiding long-term stress damage to the cylinder shaft, thereby improving safety.

[0035] The pallet positioning mechanism of this solution uses a pad to provide support for the positioning pin, which can effectively prevent the cylinder from receiving downward pressure during testing, which is beneficial to improving the reliability of jacking and avoiding long-term stress damage to the cylinder shaft, thereby improving safety.

[0036] The protective cover of this solution is provided with an opening and a sliding door that can be opened and closed automatically, which greatly facilitates loading and unloading of materials without moving the cart outside for loading and unloading, and can effectively improve the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a top view of the airtightness detection device of the present invention;

[0038] Figure 2 is a front view of the airtight detection device of the present invention;

[0039] Figure 3 is a perspective view of the cart of the present invention;

[0040] Figure 4 is an end view of the jacking device of the present invention;

[0041] Figure 5 It is a three-dimensional diagram and a partial enlarged diagram of the jacking device of the present invention;

[0042] Figure 6 It is a top view of the airtightness detection device of the present invention without the trolley, the lifting device and part of the pressing device;

[0043] Figure 7 It is a partial front view of the airtightness detection device of the present invention without the trolley, the lifting device and part of the pressing device;

[0044] Figure 8 yes Figure 1 A magnified image of area A;

[0045] Fig. 9 yes Figure 7 Enlarged view of area B;

[0046] Fig.10is a top view of the anti-deformation mechanism of the present invention;

[0047] Fig.11 is a side view of the anti-deformation mechanism of the present invention;

[0048] Fig.12 is a top view of the airtightness detection device of the present invention with a protective cover;

[0049] Fig.13 is a three-dimensional diagram of the protective cover of the present invention;

[0050] Fig.14 is a front view of the grabbing device of the present invention;

[0051] Fig.15 is a side view of the grabbing device of the present invention;

[0052] Fig.16 is a rear view of the pneumatic gripper area of ​​the present invention;

[0053] Fig.17 is a side view of the pneumatic gripper area of ​​the present invention;

[0054] Fig.18 is a front view of the pneumatic gripper area of ​​the present invention;

[0055] Fig.19 is a top view of the grabbing device of the present invention;

[0056] Fig. 20 It is a rear view of the grabbing device of the present invention. DETAILED DESCRIPTION

[0057] The purpose, advantages and features of the present invention will be illustrated and explained by the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0058] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0059] The airtightness detection device disclosed by the present invention is described below in conjunction with the accompanying drawings, which is used for airtightness detection of the upper cover of a battery pack PACK. Figure 1 , Attachment Figure 2 As shown, it includes a trolley 10, a lifting device 20, a pallet positioning mechanism 30, a trolley fixing mechanism 40, an edge sealing mechanism 50 and an anti-deformation mechanism 60.

[0060] The cart 10 is used to transport a workpiece sealing mold matching the upper cover of the battery pack PACK, as shown in the attached Figure 3 As shown, it includes a movable body 1010, and the body 1010 can be various known movable structures, which usually includes a frame 1011 and rollers 1012 arranged on the frame. The frame 1011 is preferably a frame structure composed of profiles, and the rollers 1012 are universal wheels and are distributed in two rows. The number of rollers 1012 can be designed according to needs, preferably 6, and of course it can also be 4 or 8, etc.

[0061] The cart 10 can be an active structure or a passive structure. The active structure means that it has a power source such as a motor, and can be a structure such as an AGV or a tram, so that it can be controlled by various known automatic control technologies or remote control technologies. The specific control method here is known and is not the innovation of this solution, so it will not be described again. When the cart 10 adopts a passive structure, it needs to be pushed by a person. Therefore, in order to facilitate the operation of the staff, a push rod 1013 is also provided on the frame 1011 for the staff to hold.

[0062] As attached Figure 3 As shown, a tray 1020 is provided on the vehicle body 1010. The tray 1020 can be various known structures. Specifically, it includes a frame composed of profiles and a support plate 1021 provided on the frame. The support plate 1021 is approximately rectangular in shape as a whole. A workpiece sealing mold 1030 is detachably provided on the tray 1020. The workpiece sealing mold 1030 is a contoured structure matching the upper cover of the battery pack PACK. When the upper cover of the battery pack PACK is placed on the workpiece sealing mold 1030, the upper cover of the battery pack PACK is confined on the workpiece sealing mold 1030. At the same time, they can enclose a cavity. The air tightness detection system is connected through the air holes of the upper cover of the battery pack PACK. By inflating the cavity and detecting the air pressure in the cavity, it can be detected whether there is air leakage in the cavity, thereby determining the sealing of the upper cover of the battery pack PACK.

[0063] When positioning the workpiece sealing mold 1030, as shown in the attached Figure 3As shown, this is achieved by setting a group of positioning blocks on the tray 1020. Specifically, a pair of first positioning blocks 1022 and a pair of second positioning blocks 1023 are set on the top surface of the tray 1021. Each of the first positioning blocks 1022 and the second positioning blocks 1023 are approximately L-shaped. They are distributed in a quadrilateral and form a positioning space. When the workpiece sealing mold 1030 is located in the positioning space defined by a pair of first positioning blocks 1022 and a pair of second positioning blocks 1023, the first positioning blocks 1022 and the second positioning blocks 1023 are located at the four top corners of the workpiece sealing mold 1030.

[0064] And because the battery pack PACK cover has different sizes, the workpiece sealing mold 1030 also has different sizes. In order to meet the testing requirements of different battery pack PACK covers, the tray 1020 needs to meet the placement requirements of workpiece sealing molds 1030 of different sizes. Figure 3 As shown, the second positioning blocks 1023 are multiple pairs, specifically three pairs. Each pair of second positioning blocks 1023 and a pair of first positioning blocks 1022 form a positioning space for limiting the workpiece sealing mold 1030. The three positioning spaces have the same width and different lengths, so that one tray 1020 can meet the positioning requirements of three workpiece sealing molds 1030 of different sizes.

[0065] In order to better define and fix the workpiece sealing mold 1030, as shown in the attached Figure 3 As shown, side positioning blocks 1024 are also gap-arranged on the support plate 1021, each of the side positioning blocks 1024 has a boss 1025 facing the workpiece sealing mold 1030, and each of the side positioning blocks 1024 is fixed to the support plate 1021 by screwing. When the workpiece sealing mold 1030 is located in the positioning space defined by a pair of first positioning blocks 1022 and a pair of second positioning blocks 1023, the boss 1025 is pressed on the edge of the workpiece sealing mold 1030.

[0066] The lifting device 20 is used to lift the cart 10 moved above it to a certain height. The installation position of the lifting device 20 is fixed, specifically, it is located in a space for parking the cart formed on a base 7. It can be various mechanisms that can apply an upward lifting force to the cart 10. During testing, the lifting device 20 also needs to withstand additional downward pressure. Therefore, in order to ensure the reliability of the lifting, the lifting device 20 adopts the following structure.

[0067] In detail, as attached Figure 2 , Attachment Figure 4 , Attachment Figure 5As shown, the lifting device 20 includes a lifting bracket 2010, the width of which is smaller than the spacing between the two rows of rollers on the frame 1011 and the top surface of which is lower than the bottom of the frame 1011 under normal conditions, so as to facilitate the smooth movement of the cart 10 to the top of the lifting device 20. The lifting bracket 2010 is slidably arranged on a first guide rail 2020 extending in the longitudinal direction, and a group of rollers 2030 are arranged on the lifting bracket 2010, the axes of the rollers 2030 are parallel to and perpendicular to the first guide rail 2020, each of the rollers 2030 is arranged on a driving block 2040, and the driving block 2040 includes an inclined surface 2041 and a plane 2042 connected to the top of the inclined surface 2041, and a plurality of the driving blocks 2040 are arranged on a carrier plate 20 60, the carrier plate 2060 is slidably disposed on a horizontal guide rail 2070, the horizontal guide rail 2070 is perpendicular to the axis of the first guide rail 2020 and the roller 2030, the carrier plate 2060 is connected to a lifting cylinder 2050 that drives its translation, the extension direction of the cylinder shaft of the lifting cylinder 2050 is perpendicular to the axis of the first guide rail 2020 and the roller 2030, the lifting cylinder 2050 and the horizontal guide rail 2070 are respectively fixed on a base 2080.

[0068] As attached Figure 5 As shown, in order to improve the smoothness of the movement of the roller 2030 on the driving block 2040, a bottom plane 2043 is connected to the lower end of the inclined surface 2041, and at the same time, the connecting part 2044 of the bottom plane 2043 and the plane 2042 and the inclined surface 2041 is rounded.

[0069] When the lifting cylinder 2050 drives the carrier plate 2060 to translate, each of the driving blocks 2040 translates to drive the rollers 2030 to move between the bottom plane 2043 and the plane 2042. When the rollers 2030 move to the plane 2042, the lifting bracket is in a high position, and the rollers 2030 have no tendency to roll down. At the same time, the pressure on the lifting bracket 2010 is completely borne by the plane 2042, and the lifting cylinder does not need to bear the downward pressure, thereby effectively improving the reliability of the lifting and reducing the damage to the cylinder shaft of the lifting cylinder. When the rollers 2030 are located at the bottom plane 2043, the lifting bracket is located at a low position.

[0070] In order to facilitate pushing the cart 10 to the predetermined position above the lifting device 20 so as to facilitate the subsequent positioning and fixing of the tray 1020, as shown in the attached Figure 6As shown, two parallel guide rods 80 are arranged on both sides of the lifting device 20, and the guide rods 80 are fixed on the base 7. A space for the cart 10 to enter and park is formed on the base 7. The entrances of the two guide rods 80 are trumpet-shaped with a large outside and a small inside, so that the cart 10 can easily enter between the two guide rods 80. At the same time, as shown in the attached Figure 3 As shown, a row of pulleys 1040 are respectively provided on both sides of the cart 10, and the axes of the pulleys 1040 extend longitudinally. When the cart 10 is located between the two guide rods 80, the wheel surface of the pulley 1040 on each side of the cart is in contact with the guide rods 80.

[0071] As attached Figure 6 As shown, a blocking block 90 is also provided at the end of each guide rod 80 , and the blocking block 90 is fixed on the base 7 . When the front end of the cart 10 abuts against the blocking block 90 , it is blocked and roughly positioned.

[0072] After the cart is roughly positioned and lifted, the pallet 1020 needs to be positioned horizontally to ensure the position accuracy of the workpiece on the pallet, which is specifically achieved by the pallet positioning mechanism 30, as shown in the attached figure. Figure 7-Figure 9 As shown, the pallet positioning mechanism 30 includes a positioning pin 3010 corresponding to the positioning ring 1026 at the bottom of the pallet 1020, the positioning pin 3010 is connected to the cylinder 3020 that drives it to rise and fall, the positioning ring 1026 is two and is located at two opposite vertex positions of the frame, the upper end of each positioning pin 3010 is in a frustum shape, the positioning pin 3010 is connected to the cylinder 3020 through a transfer column 3060 coaxially connected thereto, the cylinder 3020 is fixed on a fixed bracket 3070, the bracket 3070 is fixed on a base 7, and the bracket 3070 is also provided with a guide sleeve sleeved on the outer periphery of the transfer column 3060. When the cylinder shaft of the cylinder 3020 extends and drives the positioning pin 3010 to move to a high position, each positioning pin 3010 is inserted into a positioning hole of the positioning ring 1026 to achieve the positioning of the pallet. When the cylinder shaft of the cylinder 3020 is retracted, the positioning pin 3010 is driven to move out of the positioning hole of the positioning ring to release the positioning of the tray.

[0073] Further, in order to prevent the cylinder shaft of the cylinder 3020 from being subjected to excessive pressure, the attached Figure 8 , Attachment Fig. 9As shown, a support plate 3030 is coaxially arranged on the outer periphery of the positioning pin 3010, and the support plate 3030 is located at the bottom of the positioning pin 3010, and the support plate 3030 is coaxially fixed on the adapter column 3060. When the positioning pin 3010 moves to a high position, the support plate 3030 is supported by a cushion block 3040 which can be moved to the bottom of the support plate 3030 and fits with the bottom surface of the support plate 3030. The cushion block 3040 is slidably arranged on the top surface of the base 7, so that the pressure on the positioning pin is transmitted to the base 7 by the cushion block 3040, which greatly reduces the force on the cylinder 3020. The pad 3040 has a notch (not shown in the figure) whose width and depth are equivalent to the diameter of the adapter column 3060, and the pad 3040 is connected to the translation cylinder 3050 that drives it to translate. The translation cylinder 3050 is fixed to the top surface of the base 7 and connected to the pad 3040 through an adapter block. The adapter block can be slidably set on a fixed slide rail. Of course, the adapter block and the slide rail are not necessary and can be omitted. When the cylinder shaft of the translation cylinder 3050 is extended, the pad 3040 moves to the bottom of the support plate 3030 to support the support plate 3030; when the cylinder shaft of the translation cylinder 3050 is retracted, the pad 3040 moves to the outside of the support plate 3030, so that the cylinder 3020 can drive the positioning pin 3010 to move to a low position.

[0074] After the tray 1020 is positioned, the cart 10 needs to be fixed, as shown in the attached Figure 6 , Attachment Figure 7As shown, the cart fixing mechanism 40 has a structure for fixing the position of the cart 10, and includes a mounting frame 4010 fixed on each of the blocking blocks 90, and a rotation drive device 4020 is arranged on the mounting frame 4010, and the rotation drive device 4020 can be a rotary cylinder or a swing electric cylinder, and a rotation axis 4021 of the rotation drive device 4020 extends longitudinally and is connected to one end of a swing arm 4030, and both ends of the rotation axis 4021 have chamfered rectangular portions, and the connecting end of the swing arm 4030 and the rotation axis 4021 has two right-angled connecting surfaces, and the swing arm 4040 is fixed to the chamfered rectangular portions at both ends of the rotation axis by a locking block 4050 having two right-angled connecting surfaces, and the locking block 4050 and the connecting end of the swing arm 4030 are connected by bolts. The outer end of the swing arm 4040 is connected to a pressure block 4060, and the rotary drive device 4020 drives the swing arm 4040 to rotate, thereby driving the pressure block 4060 to rotate. When the pressure block 4060 is in the unlocked position, it is located on the outer side of the corresponding guide rod 80. When the pressure block 4060 is in the locked position, it is located on the inner side of the corresponding guide rod 80 and opposite to the blocking block 90. ​​The distance between the opposite end faces of the pressure block 4060 and the blocking block 90 is sufficient to clamp the vertical pole 1014 of the cart 10 to fix the cart 10.

[0075] After the tray 1020 is positioned, the tray 1020 needs to be fixed. The tray fixing mechanism 70 can apply pressure to the two opposite sides of the tray 1020. Figure 6 As shown, it includes two clamping cylinders 7010 located outside the two sides of the jacking device 20 in the length direction, and the two clamping cylinders 7010 are respectively fixed on the top surface of the base 7, and the cylinder axis of each clamping cylinder 7010 is respectively connected to the clamping member 7020, and the clamping member 7020 includes a base plate 7021 and a baffle 7022 perpendicular to the base plate 7021 and located above the base plate 7021, and the baffle 7022 is connected to the cylinder axis of the clamping cylinder 7010.

[0076] After the cart and the tray are fixed, the edge of the upper cover of the battery pack PACK can be sealed. The edge sealing mechanism 50 is used to apply pressure to the edge of the upper cover of the battery pack PACK on the tray 1020 so that the edge of the upper cover of the battery pack PACK is sealed to ensure the reliability of the test. Figure 6 , Attachment Figure 7As shown, the edge sealing mechanism 50 includes a group of pressers 5010 surrounding the outside of the trolley 10 located on the lifting device. The pressers 5010 are fixed on the top of the base 7. The number of pressers 5010 can be designed as needed, preferably 15, and they are distributed in a C shape. And each of the second positioning blocks 1023 corresponds to a presser 5010, so that the edge sealing requirements of the upper cover of the battery pack PACK of different sizes can be met.

[0077] As attached Figure 7 As shown, the structure of each of the clamps 5010 is the same as the above-mentioned cart fixing mechanism 40, which includes a rotation drive device 5011. The rotation drive device 5011 can be a rotation cylinder or a swing electric cylinder. The rotation axis of the rotation drive device 5011 is connected to one end of a swing arm 5012. The front end (the other end) of the swing arm 5012 is provided with a pressing head 5013. The rotation drive device drives the swing arm 5012 to rotate by an angle of not less than 90°. Preferably, the front end surface of the pressing head 5013 is ensured to be in contact with the upper cover surface of the battery pack PACK.

[0078] Since the battery pack PACK upper cover may bulge and deform under the action of air pressure when air is inflated into the cavity enclosed by the battery pack PACK upper cover and the workpiece sealing mold, the anti-deformation mechanism 60 is provided to prevent this problem from occurring. The anti-deformation mechanism 60 has a structure for applying pressure to the top of the battery pack PACK upper cover on the tray 1020.

[0079] As attached Fig.10 , Attachment Fig.11 As shown, the anti-deformation mechanism 60 includes a bracket 6010, the length of the bracket 6010 is equivalent to the length of the tray of the cart 10, and the bracket 6010 can move between a first position and a second position. At the first position, the bracket 6010 is located outside the cart 10 on the lifting device 20, and at the second position, it is located above the cart 10 of the lifting device 20. Specifically, both ends of the bracket 6010 are slidably mounted on a support frame 6060, the support frame 6060 is fixed on the top surface of the base 7, and each of the support frames 6060 extends along the width direction of the bracket 6010. The bracket 6010 is connected to a translation mechanism 6070 that drives it to move along the support frame 6060 between the first position and the second position. The translation mechanism 6070 is an electric cylinder connected to the bracket 6010, and of course, it can also be other feasible structures, such as a cylinder or a hydraulic cylinder.

[0080] As attached Fig.10As shown, the bracket 6010 is provided with a first pressing mechanism 6020, a second pressing mechanism 6030 and a third pressing mechanism 6040 from top to bottom. The first pressing mechanism 6020, the second pressing mechanism 6030 and the third pressing mechanism 6040 have similar structures. They all include pressing plates 6021, 6031, 6041 fixed below the bracket 6010. The bottoms of the pressing plates 6021, 6031, 6041 are respectively provided with a group of pressing heads 6022, 6032, 6042. The pressing heads 6021, 6031, 6041 are respectively provided with a group of pressing heads 6022, 6032, 6042. The specific distribution positions of the pressure heads 6022, 6032, and 6042 are designed as required, and the pressure heads 6022, 6032, and 6042 can also be used as plugs to block the holes on the upper cover of the battery pack PACK when necessary. Each of the pressure plates 6021, 6031, and 6041 is respectively connected to a downward pressure cylinder 6023, 6033, and 6043 that drives the lifting and lowering thereof and is fixed on the bracket 6010. Each of the pressure plates 6021, 6031, and 6041 is also respectively connected to a guide mechanism composed of a guide shaft and a sleeve. At the same time, a guide rail lock 6024, 6034, and 6044 is provided on some of the guide shafts.

[0081] At the same time, in order to adapt to different sizes of battery pack PACK covers, as shown in the attached Fig.10 , Attachment Fig.11 As shown, the anti-deformation mechanism 60 also includes three groups of fourth pressing mechanisms 6050, one group of fourth pressing mechanisms 6050 is located between the second pressing mechanism and the third pressing mechanism, and the other two groups of fourth pressing mechanisms 6050 are located on the lower side of the third pressing mechanism, each of the fourth pressing mechanisms 6050 includes a pressing cylinder 6051, and the pressing cylinder 6051 is a locking cylinder, the pressing cylinder 6051 is connected to a pressing plate 6052, and a plurality of pressing heads 6053 are arranged on the pressing plate 6052, and the plurality of pressing heads 6053 can also be used to seal the holes on the upper cover of the battery pack PACK when necessary.

[0082] In order to ensure the safety of the entire equipment, Fig.12 , Attachment Fig.13 As shown, the base 7 is also provided with a protective cover 1 covering the tray positioning mechanism 30, the trolley fixing mechanism 40, the edge sealing mechanism 50 and the anti-deformation mechanism 60. In order to facilitate pushing the trolley 10 into the protective cover 1, a door 5 that can be opened and closed and is opposite to the position of the guide rods 80 is opened on the side of the protective cover 1, thereby facilitating pushing the trolley into the two guide rods 80.

[0083] Furthermore, in order to facilitate the loading and unloading of the battery pack PACK, as shown in the attached Fig.12 , Attachment Fig.13As shown, an opening corresponding to the trolley on the jacking device is provided at the top of the protective cover 1, and a sliding door that can be opened and closed automatically is provided at the opening. The sliding door covers the opening at the top of the protective cover 1 at the first position, that is, the sliding door is in a closed state. The sliding door is located outside the opening at the second position, specifically, it moves to the top of the bracket 6010 at the first position, that is, the door body 2 is in an open state. Both ends of the door body 2 of the sliding door are slidably arranged on a track 3, and the track 3 is fixed on the protective cover 1. The extension direction of the track 3 is parallel to the moving direction of the bracket 6010. The door body 2 is connected to a translation mechanism 4 that drives it to slide along the track 3. The translation mechanism 4 can be various known structures that can produce linear movement, such as a known device such as a cylinder and an electric cylinder.

[0084] Finally, in order to facilitate moving the upper cover of the battery pack PACK onto the cart 10, a transport device is also included, which includes a gripping device and a device for driving the gripping device to move.

[0085] As attached Fig.14 , Attachment Fig.15 As shown, the gripping device includes a frame 100, and the frame 100 is used to provide installation space and support for components to be installed thereon. The frame 100 can be constructed of various profiles and / or plates. In this embodiment, the frame 100 is a rectangular frame formed by multiple profiles 110.

[0086] As attached Fig.14 , Attachment Fig.15 As shown, the frame 100 is provided with a plurality of pneumatic grippers 200 and a first pneumatic sensor 300 for judging the working status of each pneumatic gripper 200. The first pneumatic sensor 300 is connected to a control component 400. The control component 400 can control the operation of the pneumatic grippers 200 and has a pneumatic indicator light 410 for indicating the working status of the pneumatic grippers 200.

[0087] During operation, the opening and closing states of the pneumatic clamp 200 are detected by the first pneumatic sensor 300 and the detection state is displayed by the pneumatic indicator light 410, without the need for detection and display by electrical sensors and electrical indicator lights, thereby effectively avoiding the use of circuit structures.

[0088] As attached Fig.14 , Attachment Fig.15As shown, the number of the pneumatic clamps 200 can be designed as needed. For example, when the workpiece to be clamped is small, there can be two pneumatic clamps 200, which are relatively arranged on both sides of the frame 100. When the workpiece is large, there can be three pneumatic clamps 200, which are distributed in a triangle on both sides of the frame 100, for example, there are two pneumatic clamps 200 on one side of the frame, and one pneumatic clamp is arranged on the other side and is located between the two pneumatic clamps on the other side; or there can be four pneumatic clamps 200, which are distributed in a rectangular shape on both sides of the frame 100 and are opposite to each other. Of course, the number of the pneumatic clamps 200 can also be more.

[0089] The pneumatic clamp 200 can be of various feasible structures, such as the attached Fig.16 As shown, in a preferred embodiment, the pneumatic clamp 200 includes a claw body 210 and a pneumatic element 220. The claw body 210 is L-shaped as a whole. The upper end of the claw body 210 is rotatably connected to a mounting seat 900 on the side of the frame 100 through a shaft 250. The mounting seat 900 is provided with the pneumatic element 220, and the pneumatic element 220 drives the claw body 210 to rotate around the axis connected to the frame 100. The pneumatic element 220 can be various feasible structures, such as a rotary cylinder or a pneumatic motor, etc., which can be connected to the shaft 250 by a bracket, and the shaft 250 is connected to the mounting seat 900 through a bearing and fixedly connected to the claw body 210.

[0090] Of course, in other embodiments, the pneumatic element 220 may also be a pneumatic or hydraulic device capable of producing linear movement, such as a cylinder or a hydraulic cylinder. Fig.16 , Attachment Fig.17 As shown, the cylinder shaft 221 of the cylinder passes through the mounting seat 900 and is connected to a transmission rod 230, and the transmission rod 230 is vertically and rotatably connected to the cylinder shaft of the cylinder. Specifically, the cylinder shaft 221 of the cylinder is connected to the transmission rod 230 through a connecting sleeve 260, and the transmission rod 230 can move up and down relative to the mounting seat 900. The mounting seat 900 is formed with a waist-shaped hole 910 for the transmission rod 230 to move. The transmission rod 230 is pivotally connected to one end of a linkage member 240, and the linkage member 240 is T-shaped as a whole, and a notch 241 is formed thereon for the connection sleeve 260 to be installed. The other end of the linkage member 240 is pivotally connected to the claw body 210, specifically located in the middle of the claw body 210, and the claw body 210 is formed with an avoidance hole (not shown in the figure) for the linkage member 240 to rotate.

[0091] During operation, the cylinder drives the transmission rod 230 to rise and fall. When the transmission rod 230 descends, the transmission rod 230 drives the linkage member 240 to switch from a nearly vertical state to a nearly horizontal state, thereby pushing the claw body 210 to rotate toward the bottom of the frame 100 around the axis 250 connected to the frame. Multiple claw bodies 210 rotate synchronously to hold the workpiece at the bottom of the frame 100. When the transmission rod 230 rises, the claw body 210 moves in the opposite direction to open.

[0092] The first pneumatic sensor 300 is fixed on the mounting seat 900 and can be triggered by contacting the outer side wall of the claw body 210 in the closed state.

[0093] In addition, in order to ensure the reliability of the locking of the claw body 210, as shown in the attached Fig.16 As shown, a locking hole 231 is formed at least at one end of the transmission rod 230, and a locking pin 500 that can be embedded in the locking hole 231 is provided on the frame 100. The locking pin 500 can be locked manually, for example, the locking pin 500 is threadedly connected to a support member, and the locking pin 500 is manually twisted to be embedded in the locking hole 231 to achieve locking. Of course, an automatic locking method can also be adopted, for example, the locking pin 500 is connected to a linear drive device that drives it to reciprocate along its axis, such as a cylinder. At the same time, a second pneumatic sensor 600 for determining the position of the locking pin 500 is provided on the frame 100, and the pneumatic sensor 600 is connected to the control component 400. The control component 400 is also provided with a pneumatic indicator light for indicating the position of the locking pin 500.

[0094] Furthermore, in actual use, in order to enable the pneumatic gripper to accurately grasp, the workpiece needs to be positioned first so that the position of the workpiece matches that of the pneumatic gripper 200. Fig.17 , Attachment Fig.18 As shown, a workpiece locator 700 corresponding to the position of each pneumatic clamp 200 is provided on the frame 100 , and the workpiece locator 700 corresponds to the locating hole on the workpiece one by one.

[0095] In a preferred embodiment, as shown in the attached Fig.17 , Attachment Fig.18 As shown, the workpiece locator 700 includes a floating pin 710 which can reciprocate along its axial direction, the upper part of the floating pin 710 can be movably limited in the guide sleeve 720, the guide sleeve 720 is fixed to the top of the mounting seat 900, and is located above the support plate 212 of the closed claw body 210, and a spring 730 is arranged between the floating pin 710 and the top of the guide sleeve 720 or the mounting seat 900, and the spring 730 makes the lower end of the floating pin 710 extend to the outside of the guide sleeve 720.

[0096] As attached Fig.17 , Attachment Fig.18 As shown, a third pneumatic sensor 800 for determining the position of the workpiece locator 700 is also provided next to the workpiece locator 700, a waist-shaped hole 721 is provided on the side wall of the guide sleeve 720, and the sensing part of the third pneumatic sensor 800 can be embedded in the waist-shaped hole and contact the side wall of the floating pin 710. The diameters of different sections of the floating pin 710 are different. When the floating pin 710 does not locate the workpiece, the side wall of the floating pin 710 does not contact the sensing part of the third pneumatic sensor 800. When the lower end of the floating pin 710 is moved upward by upward pressure, the side wall of the floating pin 710 contacts the sensing part of the third pneumatic sensor 800, thereby driving the state of the floating pin 710. Further, the control component 400 also has a pneumatic indicator light for showing the working state of the workpiece locator 700.

[0097] Since the sizes of workpieces often vary, in order to meet the needs of grasping different workpieces, part or all of the pneumatic clamps 200 can be arranged on the frame 100 in a linearly translatable manner.

[0098] In a preferred embodiment, as shown in the attached Fig.19 As shown, there are four pneumatic clamps 200, which are arranged in pairs on both sides of the frame 100, and the mounting seats 900 where the two opposite pneumatic clamps 200 are located are connected to a transmission plate 1000, and the transmission plate 1000 is connected to a slide cylinder 3000 that drives it to move back and forth in a longitudinal direction perpendicular to the transmission plate 1000 through a C-shaped connecting piece 2000. The slide cylinder 3000 is fixed on the frame 100, and the mounting seat 900 is slidably arranged on the guide rail 4000 on the side of the frame 100.

[0099] Thus, two pairs of pneumatic clamps 200 are driven by two slide cylinders 2000 to move relative to or away from each other, so that the distance between the two pairs of pneumatic clamps 200 can be adjusted to meet the handling needs of workpieces of different sizes. In addition, the synchronous adjustment of the two pairs of pneumatic clamps 200 can ensure the stability of the center of gravity of the overall structure and avoid the center of gravity shift of the grasping device.

[0100] Of course, after the positions of the two pairs of pneumatic clamps 200 are adjusted, their positions can also be locked to avoid displacement of their positions when air supply fails. This can be achieved by using a structure similar to the above-mentioned locking pin and locking hole, which will not be elaborated here.

[0101] At the same time, if attached Fig.14As shown, two positioning structures 7000 are provided on each side of the frame and are located between the two pneumatic clamps 200. The positioning members of the two positioning structures 7000 are L-shaped and are relatively arranged to form positioning grooves, which can pre-position the workpiece before the pneumatic clamps pneumatically grasp it. Of course, the positioning members can also be driven to rise and fall by cylinders when necessary.

[0102] Since the control assembly 400 is manually operated to realize the use of the grabbing device, and different operators often have different heights, therefore, in a more preferred embodiment, the height of the control assembly 400 is adjustable. Specifically, as shown in the attached Fig.19 , Attachment Fig. 20 As shown, a mounting frame 120 extending vertically is also provided on the side of the frame 100, and a sliding cylinder 5000 is provided on the mounting frame 120. The sliding cylinder 5000 is connected to the control component 400. The control component 400 is also slidably provided on the guide column 6000 on the mounting frame 120 through a sliding sleeve, and one of the sliding sleeves has a self-locking structure.

[0103] As attached Fig.19 As shown, the control assembly 400 includes a grip handle 420 , a plurality of pneumatic indicator lights 410 , and a plurality of control buttons 430 .

[0104] The moving device (not shown in the figure) is, for example, a pneumatic balance crane (not shown in the figure). The specific structure of the pneumatic balance crane is a known technology and is not an innovation of the present invention, so it will not be described here. The pneumatic balance crane is also connected to the control component 400 and is controlled by the control component 400.

[0105] When the airtightness detection device performs airtightness detection on the upper cover of the battery pack PACK, it at least includes the following steps:

[0106] S1, fix the workpiece sealing mold with the same size as the upper cover of the battery pack PACK to be tested on the tray of the cart;

[0107] S2, open the door 5, push the cart 10 to the top of the lifting device 20, and then close the door 5;

[0108] S3, the lifting cylinder 2050 of the lifting device 20 is started to drive the lifting bracket 2010 to lift up, thereby lifting the cart 10 to the test height.

[0109] S4, the cylinder shafts of the two cylinders 3020 of the pallet positioning mechanism 30 extend to drive the two positioning pins to be inserted into the positioning rings at the bottom of the pallet to position the pallet. Subsequently, the cylinder shaft of the translation cylinder 3050 extends to move the cushion block 3040 to the bottom of the support plate 3030.

[0110] S5, the cart fixing mechanism fixes the cart 10, and the pallet fixing mechanism clamps and fixes the pallet 1020.

[0111] S6, the translation mechanism 4 of the sliding door drives the door body 2 to open, and then the battery pack PACK upper cover is transferred to the workpiece sealing mold through automatic loading equipment or manual loading equipment. After the loading is completed, the sliding door is closed.

[0112] S7, at this time, each presser 5010 of the edge sealing mechanism 50 is started to apply pressure to different positions of the edge of the upper cover of the battery pack PACK.

[0113] S8, then, the bracket 6010 of the anti-deformation mechanism 60 moves to the position where it is translated above the upper cover of the battery pack PACK, and the cylinder shafts of the first pressing mechanism 6020, the second pressing mechanism 6030, the third pressing mechanism 6040 and the fourth clamping mechanism extend to apply pressure to different positions on the top of the upper cover of the battery pack PACK.

[0114] Finally, the air holes on the upper cover of the battery pack PACK are connected through the air supply and leak detection system, inflated and the pressure value is detected to determine the sealing of the upper cover of the battery pack PACK. The process here is a known technology and is not the design point of this solution, so it will not be repeated here.

[0115] After the test is completed, the bracket 6010 of the anti-deformation mechanism 60 moves to the outside of the upper cover of the battery pack PACK, the clamp 5010 stops applying pressure to the upper cover of the battery pack PACK, the sliding door opens, and the material is unloaded and reloaded through automated equipment, and the test is repeated.

[0116] Of course, the above sequence number is not the only limitation on the specific test process. For example, the tray 1020 can be pre-positioned by the tray fixing mechanism first, and then the tray 1020 can be accurately positioned by the tray positioning mechanism 30, and finally the tray can be fixed by the tray fixing mechanism. Alternatively, the upper cover of the battery pack PACK can be first transported to the cart by the transport device, and then the cart is pushed into the lifting device. After the test is completed, the cart is pushed out to unload and then load.

[0117] When performing detection, the automatic operation of each structure and device can be controlled by combining a controller with various sensors. This is a known technology and is not an innovation of this solution, so it will not be elaborated here.

[0118] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. An airtight detection device, characterized in that: Used for air tightness detection of battery pack PACK cover, including A cart, comprising a movable body and a tray on the body, wherein a workpiece sealing mold is detachably arranged on the tray; A lifting device, which can apply a lifting force to the cart moved thereon to lift the cart; The pallet positioning mechanism has a structure for horizontally positioning the pallet of the cart on the jacking device; The trolley fixing mechanism has a structure for fixing the position of the trolley on the jacking device; An edge sealing mechanism having a structure for applying pressure to the edge of the upper cover of the battery pack PACK on the tray; The anti-deformation mechanism has a structure for applying pressure to different positions of the top of the upper cover of the battery pack PACK on the tray; The lifting device comprises a lifting bracket, the lifting bracket is movably arranged on a first guide rail extending in the longitudinal direction, a group of rollers are arranged on the lifting bracket, each of the rollers is arranged on a driving block, the driving block comprises an inclined surface and a plane connected with the top of the inclined surface, and is connected to a lifting cylinder driving the lifting cylinder to translate, and the extension direction of the cylinder shaft of the lifting cylinder is perpendicular to the axis of the first guide rail and the roller; The pallet positioning mechanism comprises a positioning pin corresponding to the positioning ring at the bottom of the pallet, and the positioning pin is connected to a cylinder that drives the pallet to rise and fall; A support plate is arranged on the positioning pin, and a cushion block can be moved from the outside of the support plate to the bottom of the support plate and provide supporting force thereto, and the cushion block is connected to a translation cylinder which drives its translation.

2. The airtight detection device according to claim 1, characterized in that: The tray includes a pair of first positioning blocks and at least two pairs of second positioning blocks. Each pair of second positioning blocks and the first positioning block form a positioning space for defining a workpiece sealing mold. The plurality of positioning spaces can accommodate workpiece sealing molds of different sizes.

3. The airtight detection device according to claim 1, characterized in that: The edge sealing mechanism comprises a group of pressers distributed in a C shape, each of the pressers comprises a rotary cylinder, the rotary cylinder is connected to a swing arm, and a pressure head is arranged at the front end of the swing arm.

4. The airtight detection device according to claim 1, characterized in that: The anti-deformation mechanism includes a bracket, which can move between a first position and a second position. At the first position, the bracket is located outside the trolley on the jacking device, and at the second position, the bracket is located above the trolley on the jacking device. A plurality of downward pressing mechanisms are arranged on the bracket.

5. The airtight detection device according to claim 1, characterized in that: Also included is a tray fixing mechanism that can apply pressure towards two sides of the tray.

6. The airtightness detection device according to any one of claims 1 to 5, characterized in that: The pallet positioning mechanism, the cart fixing mechanism, the edge sealing mechanism and the anti-deformation mechanism are arranged on a base, a protective cover is arranged on the base, a space for the cart to enter is formed on the base, a door opposite to the position of the space is opened on the side of the protective cover, an opening is formed on the top of the protective cover, the opening at least covers the pallet on the cart located in the space, and a sliding door that can be opened and closed automatically is arranged at the opening.

7. The airtightness detection method of the airtightness detection device according to claim 6, characterized in that: At least the following steps are included: S1, place the workpiece sealing mold matching the upper cover of the battery pack PACK on the tray of the cart and position it; S2, the side door of the protective cover is opened, and the cart is pushed onto the lifting device; S3, the lifting device lifts the cart to the target height; S4, the pallet positioning mechanism positions the pallet; S5, the cart fixing mechanism fixes the cart; S6, the sliding door on the top of the protective cover is opened, the upper cover of the battery pack PACK is transferred to the workpiece sealing mold, and the sliding door is closed; S7, the edge sealing mechanism applies pressure to different positions of the edge of the upper cover of the battery pack PACK; S8, the anti-deformation mechanism translates to above the upper cover of the battery pack PACK and applies different pressures to the top of the upper cover of the battery pack PACK.

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