New energy battery box airtight intelligent detection equipment

Abstract

The present invention belongs to the field of new energy batteries, and proposes an intelligent air tightness detection device for a new energy battery box, including a fixture, an air tightness test station, a PLC control system, an air source station and a transmission device. The air tightness test station is provided with an upper template, a lower template, an upper hydraulic cylinder and a lower hydraulic cylinder. The hydraulic control side of the upper hydraulic cylinder and the lower hydraulic cylinder is provided with a hydraulic control system. The hydraulic control system is provided with a high-pressure overload protection mechanism and a differential advance and retreat mechanism. The hydraulic control system includes an oil tank, a reflux valve, a stop valve, a filter, a pressure gauge, an upper cylinder reversing valve, a lower cylinder reversing valve, a pilot valve, a pre-discharge reversing valve, an upper cylinder safety valve, a lower cylinder safety valve and a lower cylinder overflow valve; the device also includes a soft bag clamping device and a folding arm clamping device for quickly disassembling and replacing the upper template. The present invention has a reasonable design, adopts a hydraulic system for mold closing, has high safety, is conducive to improving battery production efficiency and has a high utilization rate, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The present invention belongs to the field of new energy batteries, and in particular relates to an intelligent airtightness detection device for a new energy battery box. Background Art

[0002] With the rapid development of new energy vehicles, the safety and reliability of new energy batteries have received more and more attention. The airtightness of the battery housing is one of the important factors to ensure battery performance and safety. The airtightness detection methods in the new energy industry include pressure drop method, bubble method, helium mass spectrometry leak detection method, pressure sensor method and infrared imaging method, among which the "pressure drop method" is a relatively economical and practical one.

[0003] At present, the "pressure drop method" air tightness test requires a lot of manual preparation before the test, and several small parts need to be manually locked during the test, so there are many problems such as low work efficiency and complicated operation, which is difficult to meet the needs of large-scale production of new energy batteries. The existing patent CN218444289U discloses a battery box air tightness test tool, including a bench assembly, the bench assembly includes a support frame and a tooling operation table, and the table of the tooling operation table is provided with a control component, a positioning component, and a receiving template; the control component includes a rotary control valve and several cylinders, the output end of the cylinder is arranged upward, and an operator is movably connected; the positioning component is scattered on the table of the tooling operation table; one side of the receiving template is formed with a front insertion notch that matches the shape of the front side of the battery box. The equipment can realize automatic detection, but the template needs to be manually aligned during the assembly process, and its efficiency needs to be improved, such as using a hydraulic system. When considering using a hydraulic system to control the template clamping, it is necessary to consider the safety of the hydraulic system's operation and the ability to protect the template and workpiece to avoid detection accidents; secondly, for testing different batteries, the shapes of the tooling fixtures used for the test are different, such as CN207495343U discloses a tooling fixture for battery box testing, and the corresponding template shapes are also different. When facing different templates, this station has a problem of poor adaptability, which affects the actual test quality. Summary of the invention

[0004] In view of the technical problems existing in the above-mentioned detection device, the present invention proposes an intelligent airtight detection device for new energy battery boxes, which has a reasonable design, adopts a hydraulic system for mold closing, has high safety, is beneficial to improving battery production efficiency and has a high utilization rate.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the new energy battery box airtight intelligent detection equipment provided by the present invention includes a tooling fixture for clamping the workpiece to be tested, an airtightness test station, a PLC control system and an air source station, and the two sides of the airtightness test station are provided with conveying equipment for conveying the tooling fixture, the airtightness test station is provided with an upper template and a lower template, and the lower template is provided with a connection port for connecting to the air source station, and the airtightness test station is provided with an upper hydraulic cylinder for driving the upper template to move downward and a lower hydraulic cylinder for driving the lower template to move upward, and the upper hydraulic cylinder and the lower hydraulic cylinder are both differentially connected hydraulic cylinders, and the hydraulic control side of the upper hydraulic cylinder and the lower hydraulic cylinder is provided with a hydraulic control system, and the hydraulic control system is provided with a high-voltage overload protection mechanism and Differential advance and retreat mechanism, the hydraulic control system includes an oil tank, a return valve and a stop valve are provided on the input side of the oil tank, a filter and a pressure gauge are provided on the output side of the oil tank, an upper cylinder reversing valve and a lower cylinder reversing valve are provided on the output side of the pressure gauge, a pilot valve is provided on the oil circuit output side of the upper cylinder reversing valve, a pre-release reversing valve is provided on the pilot control oil circuit of the pilot valve, the pre-release reversing valve is connected with the upper cylinder reversing valve and the upper hydraulic cylinder, the upper cylinder reversing valve is communicated with the inlet and outlet oil ports of the upper hydraulic cylinder, and an upper cylinder safety valve is provided between the upper cylinder reversing valve and the oil inlet direction of the upper hydraulic cylinder, the pilot control oil circuit of the pilot valve is communicated with the lower cylinder reversing valve, the lower cylinder reversing valve is communicated with the inlet and outlet oil ports of the lower hydraulic cylinder, and a lower cylinder safety valve and a lower cylinder overflow valve are provided between the lower cylinder reversing valve and the oil inlet direction of the lower hydraulic cylinder;

[0006] A soft bag clamping device for quickly removing and replacing the upper template is arranged above the upper template, and the top of the soft bag clamping device is connected to the upper hydraulic cylinder. A folding arm clamping device for quickly removing and replacing the lower template is arranged below the lower template, and the bottom of the folding arm clamping device is connected to the lower hydraulic cylinder.

[0007] Preferably, the upper cylinder reversing valve, the lower cylinder reversing valve and the pilot valve are all three-position four-way valves, and the pre-discharge reversing valve is a two-position five-way control valve.

[0008] Preferably, the soft package clamping device includes an upper movable box, which is a rectangular structure and has guide rods at its corners. The guide rods are movably coordinated with a rack arranged at an air tightness testing station. A soft package shrinkage bag is arranged inside the upper movable box. The soft package shrinkage bag is a circular structure and its diameter gradually increases from top to bottom. The interior of the soft package shrinkage bag is a hollow structure and two pairs of air ports are arranged on its top edge. The air ports cooperate with the connecting ports arranged on the upper movable box, and the air ports are connected to the air source station.

[0009] Preferably, a pair of unwinding lines are provided on both sides of the soft package shrink bag, a transition wheel that rolls with the unwinding line is provided on the side of the upper movable box, a pay-off wheel is provided at the retractable end of the unwinding line, and a retractable motor is provided at the axial end of the pay-off wheel.

[0010] Preferably, a plurality of transverse pleated belts are provided on the inner wall of the soft package shrink bag.

[0011] Preferably, the folding arm clamping device includes a lower movable box, which is a rectangular structure and has angular supports at its corners, axial holes are provided on both sides of the angular supports, a rotating shaft is provided between the oppositely arranged axial holes, a torsion spring connected to the rotating shaft is provided inside the axial hole, a shaft sleeve is provided on the rotating shaft, at least one pair of folding arms is provided on the shaft sleeve, the folding arm is an L-shaped structure and the back side of the L-shaped mouth is used to support the lower template.

[0012] Preferably, a driving frame for synchronously driving all folding arms is provided inside the lower movable box, an H-shaped frame is provided in the center of the driving frame, a pair of U-shaped movable frames are provided on both sides of the H-shaped frame, a pair of guide wheels are provided at the bottom of the movable frames, the guide wheels are movably cooperated with the guide rails provided at the bottom of the lower movable box, a connecting sleeve is provided on the wheel axle of the guide wheel, and the connecting sleeves on the two movable frames are connected by a two-way driving cylinder.

[0013] Preferably, a roller sheet group is arranged at the top end of the folding arm, and the roller sheet group includes a plurality of axially distributed roller sheets, and the centers of the roller sheets are axially connected to the folding arm.

[0014] Preferably, the folding arm comprises a main arm and a pair of forked arms, and the forked openings of the forked arms gradually widen from bottom to top.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] 1. The intelligent air tightness detection equipment for new energy battery boxes provided by the present invention controls the lifting and lowering of the upper hydraulic cylinder and the lower hydraulic cylinder by adopting a hydraulic control system, and completes the sealing clamping of the workpiece and the fixture entering the air tightness test station. After the lower template is connected to the air source station, the sealing test can be performed between the upper template and the lower template; the workpiece after the test can be in an exposed state after the upper template and the lower template are separated, and continue to be transported away from the air tightness test station by the conveying equipment, thereby improving the efficiency of air tightness detection.

[0017] 2. The new energy battery box airtight intelligent detection equipment provided by the present invention has a hydraulic control system with a high-pressure overload protection mechanism and a differential advance and retreat mechanism. The high-pressure overload protection mechanism can provide high-pressure overload protection when the upper template is descending and the lower template is closing; the differential advance and retreat mechanism can provide two stages, fast forward and slow forward. The hydraulic control system pressure in the fast forward stage is set to a relatively low pressure, and the hydraulic control system in the slow forward stage starts to provide high pressure, and the equipment enters the high-pressure closing stage. If displacement occurs during the closing process due to failure of the positioning and clamping of the battery shell, the normal descending process of the upper template is obstructed and the resistance increases to exceed a certain safety pressure threshold, the hydraulic control system automatically stops descending, thereby avoiding damage to the workpiece to be tested and the fixture.

[0018] 3. The new energy battery box airtight intelligent detection equipment provided by the present invention can use the soft package clamping device and the folding arm clamping device to quickly disassemble and assemble the upper template and the lower template respectively, which is convenient for replacing different templates suitable for the production line, which is beneficial to improving the utilization rate of the equipment.

[0019] 4. The device is reasonably designed, uses a hydraulic system for mold closing, has high safety, is conducive to improving battery production efficiency and has a high utilization rate, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A working diagram of the intelligent air tightness detection device for new energy battery boxes provided in the embodiment;

[0022] Figure 2 A schematic diagram of a hydraulic control system provided in an embodiment;

[0023] Figure 3 An axonometric view of a soft bag clamping device and a folding arm clamping device provided in an embodiment;

[0024] Figure 4 A front view of a soft bag clamping device provided in an embodiment;

[0025] Figure 5 A front view of a folding arm clamping device provided in an embodiment;

[0026] Figure 6 for Figure 5 A cross-sectional view of the middle folding arm clamping device in the EE direction;

[0027] Figure 7 A front view of the folding arm clamping device (without the lower movable box) provided in the embodiment;

[0028] Figure 8 A top view of the folding arm clamping device (without the lower movable box) provided in the embodiment;

[0029] Fig. 9 An axonometric view of a folding arm clamping device (without a lower movable box) provided for an embodiment;

[0030] Fig.10 An axonometric view of a soft-package shrink bag provided in an embodiment;

[0031] In the above figures, 1. Air tightness test station; 2. Conveying equipment; 3. Upper template; 4. Lower template; 5. Upper hydraulic cylinder; 6. Lower hydraulic cylinder; 7. Hydraulic control system; 71. Oil tank; 72. Return valve; 73. Stop valve; 74. Filter; 75. Pressure gauge; 76. Upper cylinder reversing valve; 77. Lower cylinder reversing valve; 78. Pilot valve; 79. Pre-discharge reversing valve; 710. Upper cylinder safety valve; 711. Lower cylinder safety valve; 712. Lower cylinder overflow valve; 8. Soft bag clamping device; 81. Upper movable box; 82. Guide Rod; 83, soft bag shrink bag; 84, air port; 85, connection port; 86, unwinding wire; 87, transition wheel; 88, pay-off wheel; 89, retracting and retracting motor; 9, folding arm clamping device; 91, lower movable box; 92, angular support; 93, rotating shaft; 94, bushing; 95, folding arm; 951, main arm; 952, bifurcated arm; 96, driving frame; 97, H-frame; 98, movable frame; 99, guide wheel; 910, connecting sleeve; 911, two-way driving cylinder; 912, roller set; 913, guide rail. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0034] Examples, such as Figures 1 to 10As shown, the air tightness intelligent detection equipment for the new energy battery box provided by the present invention includes a fixture for clamping the workpiece to be tested, an air tightness test station 1, a PLC control system and an air source station. The air tightness test station 1 is provided with a conveying device 2 for conveying the fixture on both sides, and the air tightness test station 1 is provided with an upper template 3 and a lower template 4. The lower template 4 is provided with a connection port 85 for quickly connecting to the air source station. Among them, the two sides of the fixture adopt a flat plate structure, and the flat plate can make an effective translational movement along the conveying direction of the conveying device 2. In addition to supporting itself, the flat plate design on both sides is also convenient for maintaining a small mold gap after the upper and lower templates 4 are molded, which is conducive to improving the pressure-keeping space with better sealing. The PLC control system adopts a Siemens PLC module to control the oil supply and return actions of the hydraulic control system 7, and also controls the air supply and exhaust actions of the air source station; the air source station is used to supply the gas pressure required for air tightness detection. The fixture, conveying device 2 and air source station are prior art, and this embodiment will not be repeated here. On this basis, the present invention adopts a hydraulic control system 7 to control the mold closing action and mold opening action of the upper mold plate 3 and the lower mold plate 4.

[0035] Specifically, Figure 1 As shown, the air tightness test station 1 provided by the present invention is provided with an upper hydraulic cylinder 5 for driving the upper template 3 to move downward and a lower hydraulic cylinder 6 for driving the lower template 4 to move upward. The upper hydraulic cylinder 5 and the lower hydraulic cylinder 6 are both differentially connected hydraulic cylinders. The hydraulic control side of the upper hydraulic cylinder 5 and the lower hydraulic cylinder 6 is provided with a hydraulic control system 7. The hydraulic control system 7 is provided with a high-pressure overload protection mechanism and a differential advance and retreat mechanism. The hydraulic control system 7 includes an oil tank 71. The input side of the oil tank 71 is provided with a return valve 72 and a stop valve 73. The output side of the oil tank 71 is provided with a filter 74 and a pressure gauge 75. The output side of the pressure gauge 75 is provided with an upper cylinder reversing valve 76 and a lower cylinder reversing valve 77. The upper cylinder reversing valve 77 is provided with a pilot valve 78 on the oil circuit output side of the upper cylinder reversing valve 76, and a pre-release reversing valve 79 is provided on the pilot control oil circuit of the pilot valve 78. The pre-release reversing valve 79 is connected with the upper cylinder reversing valve 76 and the upper hydraulic cylinder 5. The upper cylinder reversing valve 76 is connected with the oil inlet and outlet of the upper hydraulic cylinder 5, and an upper cylinder safety valve 710 and an upper cylinder overflow valve are provided between the upper cylinder reversing valve 76 and the oil inlet direction of the upper hydraulic cylinder 5. The pilot control oil circuit of the pilot valve 78 is connected with the lower cylinder reversing valve 77, and the lower cylinder reversing valve 77 is connected with the oil inlet and outlet of the lower hydraulic cylinder 6, and a lower cylinder safety valve 711 and a lower cylinder overflow valve 712 are provided between the lower cylinder reversing valve 77 and the oil inlet direction of the lower hydraulic cylinder 6. The upper cylinder reversing valve 76, the lower cylinder reversing valve 77 and the pilot valve 78 are all three-position four-way valves, and the pre-release reversing valve 79 is a two-position five-way control valve.

[0036] More specifically, the workpiece and the fixture are pushed to the correct position and then stop. The travel switch receives a signal and outputs it to the PLC control system, and the hydraulic control system 7 starts to work. The hydraulic control system 7 is used to control the lifting of the upper hydraulic cylinder 5 and the lower hydraulic cylinder 6, and to seal and clamp the workpiece and the fixture entering the air tightness test station 1. After the lower template 4 is connected to the air source station, the upper template 3 and the lower template 4 can be tested for sealing. About the air tightness test process: 1) When the mold pressure reaches the preset value, the downward movement of the upper template 3 is stopped and the pressure holding stage is entered; the workpiece to be tested is completely enclosed in a closed space formed by the mold of the upper template 3 and the lower template 4; 2) After the upper template 3 stops running, it outputs a command signal, and the PLC control system starts the gas source station to start inflating the shell sealing space; when the pressure in the closed space reaches the preset threshold, the inflation is stopped, and the gas source station and the closed space enter the pressure holding stage; 3) After entering the gas pressure holding stage, the initial pressure value of the sealed space is tracked in real time. If the pressure drop value caused by the pressure loss or leakage of the closed cavity is within the preset range within the set time, the workpiece to be tested is a qualified product that meets the technical requirements, otherwise it needs to be retested or judged as unqualified; 4) The workpiece after inspection can be in an exposed state after the upper template 3 and the lower template 4 are separated, and continue to be transported by the conveying equipment 2 to leave the air tightness test station 1. Among them, for pressure detection, a pressure sensor can be set on the gas supply line of the gas source station, or a probe can be installed at the bottom of the lower template 4 after it is installed in place. For example, a parallel dual-probe sensing device is used, and the probe and the connection hole opened on the lower template 4 are connected after assembly. The connection can be done manually or mechanically. If the value deviation measured by the two probes is within a certain range, the final result will be accepted. If the value of the dual probe test exceeds the specification range, the system will be alarmed to prompt the abnormal pressure of the workpiece to be tested at that time. This can effectively improve the accuracy of airtightness detection, avoid misjudgment of products due to failure of pressure probes, and thus improve the stability of product quality.

[0037] Furthermore, the hydraulic control system 7 has a high-pressure overload protection mechanism and a differential advance and retreat mechanism. Among them, the high-pressure overload protection mechanism can provide high-pressure overload protection when the upper mold plate 3 is downward and the lower mold plate 4 is closed, and the upper cylinder safety valve 710 and the lower cylinder safety valve 711 respectively discharge the hydraulic oil in the overpressure part of their oil circuits; the pilot oil circuit of the pilot valve 78 is connected to the oil circuit of the upper cylinder reversing valve 76, and serves as the auxiliary valve of the upper hydraulic cylinder 5 and the lower hydraulic cylinder 6. When the medium pressure reaches the opening pressure of the pilot valve, the pilot valve 78 opens first, and the discharged medium enters the main valve, i.e., the upper cylinder reversing valve 76 and the lower cylinder reversing valve 77, from the bypass pipe. In the case of pressure overload, the hydraulic oil on the system can be discharged first through the pre-discharge reversing valve 79 to achieve the purpose of reducing pressure, thereby reducing the probability of test accidents caused by overload.

[0038] Regarding the differential advance and retreat mechanism, on the one hand, the upper hydraulic cylinder 5 and the lower hydraulic cylinder 6 both use differentially connected hydraulic cylinders. The differential connection generally connects the oil inlet and oil return of the hydraulic cylinder together, and hydraulically returns the oil in the rod chamber of the cylinder to the rodless chamber to increase the speed at which the hydraulic cylinder extends outward. This is an effective method to achieve rapid movement without increasing the flow of the hydraulic pump. On the other hand, based on the differential connection, two stages of fast forward and slow forward can be provided. The pressure of the hydraulic control system 7 in the fast forward stage is set to a relatively low pressure, while the hydraulic control system 7 in the slow forward stage begins to provide high pressure, and the equipment enters the high-pressure closing stage. If displacement occurs during the closing process due to failure of the positioning and clamping of the battery housing, the normal downward process of the upper template 3 is blocked and the resistance increases to exceed a certain safety pressure threshold. The hydraulic control system 7 automatically stops descending, thereby avoiding damage to the workpiece to be measured and the fixture.

[0039] In order to adapt to different workpieces to be tested, different upper templates 3 and lower templates 4 need to be matched, and to match them, the present invention is provided with a soft pack clamping device 8 for quickly dismantling the upper template 3 above the upper template 3, and the top of the soft pack clamping device 8 is connected to the upper hydraulic cylinder 5, and a folding arm clamping device 9 for quickly dismantling the lower template 4 is provided below the lower template 4, and the bottom of the folding arm clamping device 9 is connected to the lower hydraulic cylinder 6. In particular, for the installation of the upper template 3, the soft pack clamping device 8 can automatically soft pack the surrounding of the upper template 3, and then automatically retract it by upward pulling force, that is, install it to the corresponding position.

[0040] Specifically, the soft package clamping device 8 provided by the present invention includes an upper movable box 81, which is a rectangular structure and has guide rods 82 at its corners. The guide rods 82 are movably matched with a frame arranged at the air tightness test station 1. A soft package shrinkage bag 83 is arranged inside the upper movable box. The cross-section of the soft package shrinkage bag 83 is a circular structure and its diameter gradually increases from top to bottom. Moreover, the outer contour of the soft package shrinkage bag 83 is a quadrangular pyramid, and the conical surface of the quadrangular pyramid is a curved surface. At the same time, the interior of the soft package shrinkage bag 83 is a hollow structure and two pairs of air ports 84 are arranged on its top edge. The air ports 84 cooperate with the connecting ports 85 arranged on the upper movable box 81, and the air ports 84 are connected to the air source station. Among them, the upper movable box 81 provides installation space and deformation space for the upper template 3 and the soft package shrink bag 83. The top of the soft package shrink bag 83 is installed inside the upper movable box 81 through the air port 84 and the connecting port 85. The volume of the soft package shrink bag 83 can be controlled by the air source station. For example, if the volume expansion of the soft package shrink belt is controlled, the purpose of releasing the upper template 3 can be achieved. Or, if the upper template 3 placed thereunder provides negative pressure to the soft package shrink bag 83, its volume gradually decreases, and its inner surface effectively grasps the surface of the upper template 3. The surface of the upper template 3 is generally a concave and convex surface, so in the final shrunk state of the soft package shrink bag 83, it can grasp the upper template 3 in a coating manner, thereby achieving the purpose of clamping the upper template 3.

[0041] In order to improve the disassembly and assembly efficiency of the upper template 3, the present invention is provided with a pair of unwinding wires 86 on both sides of the soft-pack shrink bag 83, and a transition wheel 87 that rolls with the unwinding wire 86 is provided on the side of the upper movable box 81. A wire unwinding wheel 88 is provided at the retracting end of the unwinding wire 86, and a retracting and discharging motor 89 is provided at the axial end of the wire unwinding wheel 88. The retracting and discharging motor 89 can control the release length of the unwinding wire 86. By controlling the length of the unwinding wire 86, the specific position of the soft-pack shrink bag 83 under tightening can be controlled. For example, if the unwinding wire 86 is shortened, the soft-pack shrink bag 83 and the upper template 3 can rise together. The contour of the entire soft-pack shrink bag 83 is basically similar to the internal space contour of the upper movable box 81. Therefore, the soft-pack shrink bag 83 can automatically enter the position defined for it during the gradual rise, until the edge of the upper template 3 is just stuck on the inner contour of the bottom edge of the upper movable box 81, thereby realizing the function of quickly assembling the upper template 3, realizing bolt-free connection, and having a reasonable structure and ingenious design.

[0042] In order to improve the clamping stability of the soft package shrink bag 83 on the upper template 3, the present invention is provided with a plurality of transverse pleated belts on the inner wall of the soft package shrink bag 83. The pleated belts can enable the soft package shrink bag 83 to exclude air in dead corners during the gradual tightening process, thereby forming a relatively tight flexible clamping arm, thereby improving the stability of clamping the upper template 3.

[0043] In order to improve the quick installation effect of the folding arm clamping device 9 on the lower template 4, the folding arm clamping device 9 provided by the present invention includes a lower movable box 91, the lower movable box 91 is a rectangular structure and is provided with angular support members 92 at its corners, the cross-section of the angular support member 92 is L-shaped, and it is connected to the lower movable box by bolts, and axial holes are provided on both sides of the L-shape of the angular support member 92, and a rotating shaft 93 is provided between the relatively arranged axial holes, and a torsion spring connected to the rotating shaft 93 is provided inside the axial hole, and a shaft sleeve 94 is provided on the rotating shaft 93, and at least one pair of folding arms 95 is provided on the shaft sleeve 94, and the folding arm 95 is an L-shaped structure and the back side of its L-shaped mouth is used to support the lower template 4. Among them, the four angular support members 92 have a total of eight axial holes, which provide rotational support for the eight axial ends of the four rotating shafts 93. After being placed on the folding arm 95, the lower template 4 can be supported by the back of the folding arm 95. The pressure of the lower template 4 and the elastic restoring force of the torsion spring can make it gradually descend to the bottom of the lower movable box 91 until the top of the lower template 4 is stuck on the top edge of the lower movable box 91, thereby realizing the assembly of the lower template 4.

[0044] Furthermore, a driving frame 96 for synchronously driving all folding arms 95 is provided inside the lower movable box 91, an H-shaped frame 97 is provided in the center of the driving frame 96, a pair of U-shaped movable frames 98 are provided on both sides of the H-shaped frame 97, a pair of guide wheels 99 are provided at the bottom of the movable frames 98, the guide wheels 99 are movably cooperated with a guide rail 913 provided at the bottom of the lower movable box 91, the axles of the two guide wheels 99 in the same pair pass through the inner wall of the guide rail and the middle of the two axles are connected to form a synchronous shaft through a connecting sleeve 910, the connecting sleeves 910 on the two movable frames 98 are connected through the two telescopic ends of a two-way driving cylinder 911, and the two-way driving cylinder 911 is used to synchronously drive the connecting sleeve 910 and the movable frame 98 to move simultaneously. Among them, the folding arm 95 can maintain the original state of being gathered in the lower movable box 91 under the torsion connection between the rotating shaft 93 and the torsion spring, and the two movable frames 98 can be synchronously driven to fold along the matching direction of the guide wheel 99 and the guide rail 913 through the contraction of the two-way driving cylinder 911. In the process of folding, the top ends of the two movable frames 98 lift up the H-shaped frame 97 and the movable frame 98, and the lifted movable frames 98 synchronously lift up all the folding arms 95, and the opening diameter formed by all the folding arms 95 is larger than the cross-section of the lower template 4; further, if the two-way driving cylinder 911 is extended, the two movable frames 98 start to move towards the folded state until the movable frames 98 descend and all the folding arms 95 fall down, and the lower template 4 is just stuck in the inside of the lower movable box 91.

[0045] In order to improve the restraining effect of the folding arm 95 on the lower template 4, the top of the folding arm 95 provided by the present invention is provided with a roller sheet group 912, and the roller sheet group 912 includes a plurality of axially distributed roller sheets and the center of the roller sheet is axially connected to the folding arm 95. The roller sheet with rolling ability is designed to produce rolling contact with the lower template 4, on the one hand, to avoid scratching the lower template 4, and on the other hand, to provide a certain clamping caliber for the lower template 4 to prevent it from slipping from the clamping range formed by all the folding arms 95 during the falling process. In the process of disassembling and assembling the lower template 4 and the upper template 3, a certain amount of manpower can be assisted, but the workload of bolt connection and the like is greatly reduced, thereby improving the installation efficiency of the upper template 3 and the lower template 4.

[0046] In order to improve the clamping and supporting effect of the folding arm 95, the folding arm 95 provided by the present invention includes a main arm 951 and a pair of bifurcated arms 952, and the bifurcated opening of the bifurcated arms 952 gradually widens from bottom to top, thereby providing a relatively large installation distance for the roller sheet and a longer support span to improve the clamping and supporting performance of the lower template 4. Further, a pair of folding arms 95 located in the width direction of the lower movable box 91 can be provided, and two pairs of folding arms 95 located in the commercial direction of the lower movable box 91 can be provided, and all the folding arms 95 will not cause mutual interference when they are gathered in the lower movable box 91, and a sufficient clamping caliber can be guaranteed when all the folding arms 95 are turned up.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A new energy battery box airtight intelligent detection equipment, including a fixture for clamping a workpiece to be tested, an airtight test station, a PLC control system and an air source station, wherein both sides of the airtight test station are provided with a conveying device for conveying the fixture, the airtight test station is provided with an upper template and a lower template, and the lower template is provided with a connection port for connecting to the air source station, characterized in that: The air tightness test station is provided with an upper hydraulic cylinder for driving the upper template to move downward and a lower hydraulic cylinder for driving the lower template to move upward. The upper hydraulic cylinder and the lower hydraulic cylinder are differentially connected hydraulic cylinders. The hydraulic control side of the upper hydraulic cylinder and the lower hydraulic cylinder is provided with a hydraulic control system. The hydraulic control system is provided with a high-pressure overload protection mechanism and a differential advance and retreat mechanism. The hydraulic control system includes an oil tank. The input side of the oil tank is provided with a reflux valve and a shut-off valve. The output side of the oil tank is provided with a filter and a pressure gauge. The output side of the pressure gauge is provided with an upper cylinder reversing valve. and a lower cylinder reversing valve, a pilot valve is provided on the oil circuit output side of the upper cylinder reversing valve, a pre-release reversing valve is provided on the pilot control oil circuit of the pilot valve, the pre-release reversing valve is connected with the upper cylinder reversing valve and the upper hydraulic cylinder, the upper cylinder reversing valve is communicated with the oil inlet and outlet of the upper hydraulic cylinder, and an upper cylinder safety valve is provided between the upper cylinder reversing valve and the oil inlet direction of the upper hydraulic cylinder, the pilot control oil circuit of the pilot valve is communicated with the lower cylinder reversing valve, the lower cylinder reversing valve is communicated with the oil inlet and outlet of the lower hydraulic cylinder, and a lower cylinder safety valve and a lower cylinder overflow valve are provided between the lower cylinder reversing valve and the oil inlet direction of the lower hydraulic cylinder; A soft bag clamping device for quickly removing and replacing the upper template is arranged above the upper template, and the top of the soft bag clamping device is connected to the upper hydraulic cylinder. A folding arm clamping device for quickly removing and replacing the lower template is arranged below the lower template, and the bottom of the folding arm clamping device is connected to the lower hydraulic cylinder.

2. The new energy battery box airtight intelligent detection equipment according to claim 1 is characterized in that: The upper cylinder reversing valve, the lower cylinder reversing valve and the pilot valve are all three-position four-way valves, and the pre-discharge reversing valve is a two-position five-way control valve.

3. The new energy battery box airtight intelligent detection equipment according to claim 2 is characterized in that: The soft package clamping device includes an upper movable box, which is a rectangular structure and has guide rods at its corners. The guide rods are movably matched with a rack arranged at an air tightness testing station. A soft package shrink bag is arranged inside the upper movable box. The soft package shrink bag is a circular structure and its diameter gradually increases from top to bottom. The interior of the soft package shrink bag is a hollow structure and two pairs of air ports are arranged on its top edge. The air ports cooperate with the connecting ports arranged on the upper movable box, and the air ports are connected to the air source station.

4. The new energy battery box airtight intelligent detection equipment according to claim 3 is characterized in that: A pair of unwinding lines are arranged on both sides of the soft package shrink bag, a transition wheel rollingly matched with the unwinding line is arranged on the side of the upper movable box, a pay-off wheel is arranged at the retractable end of the unwinding line, and a retractable motor is arranged at the axial end of the pay-off wheel.

5. The new energy battery box airtight intelligent detection equipment according to claim 4 is characterized in that: A plurality of transverse pleated belts are arranged on the inner wall of the soft package shrink bag.

6. The new energy battery box airtight intelligent detection device according to claim 1 or 5, characterized in that: The folding arm clamping device includes a lower movable box, which is a rectangular structure and has angular support members at its corners. Axial holes are provided on both sides of the angular support members, and a rotating shaft is provided between the oppositely arranged axial holes. A torsion spring connected to the rotating shaft is provided inside the axial hole, and a shaft sleeve is provided on the rotating shaft. At least one pair of folding arms is provided on the shaft sleeve. The folding arm is an L-shaped structure and the back side of the L-shaped mouth is used to support the lower template.

7. The new energy battery box airtight intelligent detection equipment according to claim 6 is characterized in that: A driving frame for synchronously driving all folding arms is arranged inside the lower movable box, an H-shaped frame is arranged at the center of the driving frame, a pair of U-shaped movable frames are arranged on both sides of the H-shaped frame, a pair of guide wheels are arranged at the bottom of the movable frame, the guide wheels are movably matched with guide rails arranged at the bottom of the lower movable box, a connecting sleeve is arranged on the wheel axle of the guide wheel, and the connecting sleeves on the two movable frames are connected by a two-way driving cylinder.

8. The new energy battery box airtight intelligent detection equipment according to claim 7 is characterized in that: A roller sheet group is arranged at the top end of the folding arm. The roller sheet group includes a plurality of axially distributed roller sheets, and the centers of the roller sheets are axially connected to the folding arm.

9. The new energy battery box airtight intelligent detection device according to claim 8 is characterized in that: The folding arm comprises a main arm and a pair of bifurcated arms, and the bifurcated openings of the bifurcated arms gradually widen from bottom to top.

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