Airtightness detection device for new energy battery shell

Abstract

The application relates to the technical field of new energy battery shell airtightness detection, in particular to a new energy battery shell airtightness detection device, which comprises an operation table base, top surfaces of left and right ends of the operation table base are fixedly provided with top rack plates through support columns, the bottom surfaces of the two top rack plates are movably provided with spring telescopic rods at front and back ends, the top surface center of the operation table base is movably provided with a suspension plate, the bottoms of the four spring telescopic rods are movably connected with four corner positions of the top surface of the suspension plate, a circular table groove is formed in the top surface center of the suspension plate, and a rotating circular table is rotatably arranged in the center of the circular table groove. The new energy battery shell airtightness detection device detects the airtightness through the differential pressure value of two vacuum containers, the device has the functions of simulating vehicle bumping and indirectly impacting the battery shell during the process, can continue to detect the airtightness of the battery shell under two common conditions, is more rigorous and accurate, and is more functional.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy battery shell airtightness detection, in particular to a new energy battery shell airtightness detection device. BACKGROUND

[0002] The airtightness of the shell of a new energy battery, such as a lithium ion battery for an electric vehicle, is very important and directly related to driving safety and performance. Problems with airtightness can directly lead to damage to the internal battery and leakage of battery liquid after damage, which is very dangerous. Therefore, airtightness detection of new energy batteries is an extremely important quality inspection process.

[0003] The main detection methods at present include pressure drop method, helium mass spectrometry leak detection method, water immersion method, flow method, differential pressure method, etc., but the common point is that the battery shell is fixed during detection and no external interference is applied. However, during actual handling or operation, the battery will inevitably encounter a large amount of jolting and bumping impact. The lack of simulation of these conditions results in insufficiently rigorous and inaccurate airtightness detection. It is unknown whether the battery shell can maintain a certain airtightness under these unexpected conditions.

[0004] In order to solve the above problems, we have made improvements and propose a new energy battery shell airtightness detection device. SUMMARY

[0005] In order to solve the above technical problems, the present application provides the following technical solutions:

[0006] The present application provides a new energy battery shell airtightness detection device, which comprises an operation table base, the top surface of the operation table base is fixedly welded with a top rack plate through a support column at the left and right ends of the top surface, the bottom surface of the mutually close end of the two top rack plates is movably provided with a spring telescopic rod at the front and rear ends, a suspension plate is movably arranged on the top surface of the center of the operation table base, the bottom part of the four spring telescopic rods is movably connected with the four corner positions of the top surface of the suspension plate, a circular table groove is formed in the center of the top surface of the suspension plate, and a rotating circular table is rotatably arranged in the center of the circular table groove.

[0007] A circular table fixing device is installed at the center of the front end of the bottom surface of the suspension plate, a plurality of positioning pin holes are formed at equal intervals on the edge of the bottom surface of the rotating circular table, a plurality of limiting pin holes are formed through the edge of the middle part of the front end of the bottom surface of the circular table groove, a first vacuum detection box is installed at the center of the top surface of the rotating circular table, a support table is fixedly welded on the left end of the top surface of the operation table base, a second vacuum detection box is fixedly arranged on the top surface of the support table, and a differential pressure sensor is connected in series between the first vacuum detection box and the second vacuum detection box.

[0008] Two shaking simulation rollers are movably arranged below the hanging plate, an AC motor is fixedly and boltedly arranged at the front end middle part of the inner wall of the operation base pedestal, the rotating shaft of the AC motor is in transmission connection with the two shaking simulation rollers, a transmission pressure rod is rotatably arranged at the upper front right end of the operation base pedestal, the transmission pressure rod is in transmission connection with the rotating shaft of the AC motor, and a knocking rod is rotatably arranged between the two top frame plates.

[0009] As a preferred technical scheme of the present application, the first hinge seats are fixedly arranged at the bottom front and rear ends of the bottom surfaces of the mutually approaching ends of the two top frame plates and the four corner positions of the top surface of the hanging plate, and the top end and the bottom end of each spring telescopic rod are respectively in rotary connection with the top frame plate and the hanging plate through the first hinge seats.

[0010] As a preferred technical scheme of the present application, the bearing is fixedly arranged at the bottom center of the circular table groove, the outer ring bottom surface of the bearing is fixedly connected with the bottom surface of the circular table groove, the bottom center of the rotating circular table is fixedly connected with the top surface of the inner ring of the bearing, each of the positioning pin hole groups is composed of two positioning pin holes, the inner diameters of the limiting pin holes and the positioning pin holes are the same, and the limiting pin hole groups are alignable with each of the positioning pin hole groups.

[0011] As a preferred technical scheme of the present application, the circular table fixing device comprises a second hinge seat, the top of the second hinge seat is fixedly connected with the front end middle part of the bottom surface of the hanging plate, two toggle plate side plates are rotatably arranged at the bottom end inside of the second hinge seat, a connecting plate is fixedly and welded arranged at the front end between the two toggle plate side plates, a torsional spring is arranged at the top end inside of the second hinge seat, and the bottom and the top of the torsional spring are fixedly connected with the connecting plate and the hanging plate respectively.

[0012] As a preferred technical scheme of the present application, the rear end of each of the two toggle plate side plates is provided with a limiting sliding groove, and the rear end of the toggle plate side plate is further provided with a linkage rod, the linkage rod passes through the two limiting sliding grooves, limiting pins are fixedly welded at the left and right ends of the linkage rod, the outer diameters of the two limiting pins are equal to the inner diameters of the limiting pin hole groups and each of the positioning pin hole groups, the length of the limiting pin is greater than the length of the limiting pin hole group, and the two limiting pins are in sliding connection with the inside of the limiting pin hole group.

[0013] As a preferred technical scheme of the present application, a simulation assembly through hole is arranged at the top center of the operation base pedestal, a rotating shaft is rotatably arranged at the top center of the inner wall of the operation base pedestal, the rotating shaft is located below the simulation assembly through hole, linkage side plates are fixedly and welded arranged at the front and rear ends of the rotating shaft, the two linkage side plates are respectively located at the front and rear ends inside of the simulation assembly through hole, the two shaking simulation rollers are respectively in rotary connection with the opposite surfaces between the two ends of the two linkage side plates, and the distances between the two shaking simulation rollers and the center of the rotating shaft are not equal.

[0014] As a preferred technical scheme of the present application, the front end of the rotating shaft is coaxially fixedly provided with a bevel gear, the top end of the rotating shaft of the alternating current motor is also coaxially fixedly provided with a bevel gear, the two bevel gears are engaged with each other, the right upper end of the front face of the operating table base is fixedly welded with a first transmission bin, the right end of the top face of the first transmission bin is fixedly welded with a second transmission bin, and the front top of the second transmission bin is rotatably provided with a transmission pressure rod.

[0015] As a preferred technical scheme of the present application, the left end of the inside of the first transmission bin is rotatably installed with a first sprocket, the right end of the inside of the first transmission bin is rotatably provided with a second sprocket and a third sprocket, the second sprocket and the third sprocket are coaxially fixedly connected, the first sprocket is coaxially fixedly connected with the rotating shaft, the first sprocket and the second sprocket are connected through a chain transmission, the top end of the inside of the second transmission bin is rotatably provided with a fourth sprocket, the fourth sprocket is connected with the third sprocket through a chain transmission, and the rotating central shaft end of the transmission pressure rod is coaxially fixedly connected with the fourth sprocket.

[0016] As a preferred technical scheme of the present application, the other end of the transmission pressure rod is provided with a pitch adjusting handle, the connecting end of the pitch adjusting handle is coaxially welded with a threaded rod, an internal thread hole is formed in the surface of the other end of the transmission pressure rod, the pitch adjusting handle is detachably connected with the transmission pressure rod through the threaded rod and the internal thread hole, the top of the knocking rod is fixedly welded with a transmission shaft rod, the two ends of the transmission shaft rod are rotatably connected with the middle portions between the two top frame plates respectively, the front right end of the transmission shaft rod is fixedly welded with a transmission tilting rod, the bottom end of the knocking rod is fixedly provided with a rubber knocking hammer, the top center of the rotating circular table is provided with a limiting square groove, the inner wall of the limiting square groove is fixedly provided with connecting springs at equal intervals, and the outer bottom end of the first vacuum detection box is fixedly connected with the connecting springs.

[0017] As a preferred technical scheme of the present application, the top of the first vacuum detection box is detachably provided with a sealing cover, the top middle portion of the sealing cover is fixedly installed with a first electric control vacuum ball valve, the front face of the outside of the first vacuum detection box is fixedly installed with a second electric control vacuum ball valve, the front face of the inner wall of the first vacuum detection box is fixedly provided with a battery shell butt joint hose, the battery shell butt joint hose is communicated with the second electric control vacuum ball valve, the top face of the second vacuum detection box is fixedly and communicatedly installed with a third electric control vacuum ball valve, the left side of the first vacuum detection box and the right side of the second vacuum detection box are both fixedly provided with flange pipes, and the two end sensors of the differential pressure sensor are fixedly and communicatedly connected with the flange pipes of the first vacuum detection box and the second vacuum detection box through flanges.

[0018] The beneficial effect of the present application is: a kind of new energy battery shell air-tightness detection device, the air-tightness is detected by the differential pressure value of two vacuum containers, the equipment has the function of simulating vehicle jolt, battery shell indirect impact condition in process, can continue to detect the air-tightness of battery shell in two common situations, rather than only detect air-tightness in the case where battery shell has no external interference, more rigorous and accurate, more functional. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, and do not constitute a limitation of the present application.In the drawings:

[0020] Figure 1 is a shaft side view of the present application for a new energy battery shell air-tightness detection device;

[0021] Figure 2 is a front structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0022] Figure 3 is a back structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0023] Figure 4 is a left side structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0024] Figure 5 is a local structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0025] Figure 6 is a jolt simulation roller and transmission pressure bar drive transmission structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0026] Figure 7 is a suspension plate local structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0027] Figure 8 is a circular table fixing device structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0028] Figure 9 is a rotating circular table local structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0029] Figure 10 is a rotating circular table and first vacuum detection box section structure schematic view of the present application for a new energy battery shell air-tightness detection device;

[0030] In the diagram: 1. Operating platform base; 101. First transmission compartment; 102. Second transmission compartment; 2. Simulation component port; 3. Top frame plate; 4. Spring telescopic rod; 5. First hinge seat; 6. Suspension plate; 7. Frustum groove; 8. Bearing; 9. Rotating frustum; 10. Limit pin hole group; 11. Frustum fixing device; 12. Second hinge seat; 13. Paddle side plate; 14. Connecting plate; 15. Torsion spring; 16. Limit slide groove; 17. Linkage rod; 18. Limit pin; 19. Positioning pin hole group; 20. AC motor; 21. Rotating shaft; 22. Linkage... 23. Moving side plate; 24. Tumbling simulation roller; 25. First sprocket; 26. Second sprocket; 27. Third sprocket; 28. Fourth sprocket; 29. ​​Transmission pressure rod; 30. Adjustment handle; 31. Transmission shaft; 32. Transmission rocker arm; 33. Striking rod; 34. Limiting square groove; 35. Connecting spring; 36. First vacuum detection box; 37. Sealing cover; 38. First electrically controlled vacuum ball valve; 39. Second electrically controlled vacuum ball valve; 40. Battery casing docking hose; 41. Second vacuum detection box; 42. Third electrically controlled vacuum ball valve; 43. Differential pressure sensor. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] Example: Figures 1-10 As shown, a device for airtightness testing of new energy battery casing includes an operating platform base 1. Top frame plates 3 are fixedly welded to the top of the left and right ends of the top surface of the operating platform base 1 by support columns. Spring telescopic rods 4 are movably arranged at the front and rear ends of the bottom ends of the two top frame plates 3 that are close to each other. A suspension plate 6 is movably arranged above the center of the top surface of the operating platform base 1. The bottom of the four spring telescopic rods 4 are movably connected to the four corners of the top surface of the suspension plate 6. A frustum groove 7 is opened in the center of the top surface of the suspension plate 6. A rotating frustum 9 is rotatably arranged in the center of the frustum groove 7.

[0033] A frustum fixing device 11 is installed at the center of the front end of the bottom of the suspension plate 6. A set of positioning pin holes 19 is opened at equal intervals on the edge of the bottom surface of the rotating frustum 9. A set of limit pin holes 10 is opened through the edge of the middle of the front end of the bottom of the frustum groove 7. A first vacuum detection box 35 is installed at the center of the top surface of the rotating frustum 9. A support platform is fixedly welded to the left end of the top surface of the operating table base 1. A second vacuum detection box 40 is fixedly installed on the top surface of the support platform. A differential pressure sensor 42 is connected in series between the second vacuum detection box 40 and the first vacuum detection box 35.

[0034] Two shaking simulation rollers 23 are movably arranged below the hanging plate 6, an AC motor 20 is fixedly arranged at the front end of the middle part of the inner wall of the operating platform base 1, the rotating shaft of the AC motor 20 is in transmission connection with the two shaking simulation rollers 23, a transmission pressing rod 28 is rotatably arranged at the upper front end of the right outer end of the operating platform base 1, the transmission pressing rod 28 is in transmission connection with the rotating shaft of the AC motor 20, and a knocking rod 32 is rotatably arranged between the two top rack plates 3.

[0035] The bottom surface of the end close to each other of the two top rack plates 3 and the top surface of the four corner positions of the hanging plate 6 are fixedly provided with first hinge bases 5, and the top end and the bottom end of each spring telescopic rod 4 are rotatably connected with the top rack plate 3 and the hanging plate 6 through the first hinge bases 5.

[0036] A bearing 8 is fixedly arranged at the bottom center of the circular table groove 7, the outer ring bottom surface of the bearing 8 is fixedly connected with the bottom surface of the circular table groove 7, the bottom center of the rotating circular table 9 is fixedly connected with the top surface of the inner ring of the bearing 8, each positioning pin hole group 19 is composed of two positioning pin holes, the inner diameters of the limiting pin holes and the positioning pin holes are the same, and the limiting pin hole group 10 is alignable with each positioning pin hole group 19.

[0037] The circular table fixing device 11 comprises a second hinge base 12, the top of the second hinge base 12 is fixedly connected with the front end middle part of the bottom surface of the hanging plate 6, two toggle plate side plates 13 are rotatably arranged at the bottom end inside of the second hinge base 12, a connecting plate 14 is fixedly welded at the front end between the two toggle plate side plates 13, a torsional spring 15 is arranged at the top end inside of the second hinge base 12, and the bottom and the top of the torsional spring 15 are fixedly connected with the connecting plate 14 and the hanging plate 6 respectively.

[0038] Limiting sliding grooves 16 are formed at the rear ends of the two toggle plate side plates 13, linkage rods 17 are further arranged at the rear ends of the toggle plate side plates 13, the linkage rods 17 pass through the two limiting sliding grooves 16, limiting pin locks 18 are fixedly welded at the left and right ends of the linkage rods 17, the outer diameters of the two limiting pin locks 18 are equal to the inner diameters of the limiting pin hole group 10 and each positioning pin hole group 19, the length of the limiting pin lock 18 is greater than the length of the limiting pin hole group 10, and the two limiting pin locks 18 are slidably connected with the inside of the limiting pin hole group 10.

[0039] A simulation assembly through hole 2 is formed at the top center of the operating platform base 1, a rotating shaft 21 is rotatably arranged at the center of the top end of the inner wall of the operating platform base 1, the rotating shaft 21 is located below the simulation assembly through hole 2, linkage side plates 22 are fixedly welded at the front end and the rear end of the rotating shaft 21, the two linkage side plates 22 are respectively located at the front and rear ends inside of the simulation assembly through hole 2, two shaking simulation rollers 23 are rotatably connected with the opposite surfaces between the two ends of the two linkage side plates 22, and the distances between the two shaking simulation rollers 23 and the center of the rotating shaft 21 are not equal.

[0040] The front end of the rotating shaft 21 is coaxially fixedly provided with a bevel gear, and the top end of the rotating shaft of the alternating current motor 20 is also coaxially fixedly provided with a bevel gear, the two bevel gears are meshed with each other, the right upper end of the external front face of the operation table base 1 is fixedly welded with a first transmission bin 101, the right end of the top face of the first transmission bin 101 is fixedly welded with a second transmission bin 102, and the front top of the second transmission bin 102 is rotationally provided with a transmission pressure rod 28.

[0041] A first sprocket 24 is rotationally installed at the left end in the first transmission bin 101, a second sprocket 25 and a third sprocket 26 are rotationally provided at the right end in the first transmission bin 101, the second sprocket 25 and the third sprocket 26 are coaxially fixedly connected, the first sprocket 24 is coaxially fixedly connected with the rotating shaft 21, the first sprocket 24 is connected with the second sprocket 25 through a chain transmission, a fourth sprocket 27 is rotationally provided at the top in the second transmission bin 102, the fourth sprocket 27 is connected with the third sprocket 26 through a chain transmission, and the rotating central shaft end of the transmission pressure rod 28 is coaxially fixedly connected with the fourth sprocket 27.

[0042] The other end of the transmission pressure rod 28 is provided with a pitch adjusting handle 29, the connecting end of the pitch adjusting handle 29 is coaxially welded with a threaded rod, an internal thread hole is formed in the surface of the other end of the transmission pressure rod 28, the pitch adjusting handle 29 is detachably connected with the transmission pressure rod 28 through the threaded rod and the internal thread hole, a transmission shaft rod 30 is fixedly welded at the top of a knocking rod 32, the transmission shaft rod 30 is rotationally connected with the middle part between the two top frame plates 3 at both ends, a transmission tilting rod 31 is fixedly welded at the front right end of the transmission shaft rod 30, a rubber knocking hammer is fixedly arranged at the bottom end of the knocking rod 32, a limiting square groove 33 is formed in the center of the top face of the rotating circular table 9, connecting springs 34 are fixedly arranged on the inner wall of the limiting square groove 33 at equal intervals, and the external bottom end of a first vacuum detection box 35 is fixedly connected with each connecting spring 34.

[0043] A sealing cover 36 is detachably arranged at the top of the first vacuum detection box 35, a first electric control vacuum ball valve 37 is fixedly installed at the top face of the sealing cover 36, a second electric control vacuum ball valve 38 is fixedly installed on the external front face of the first vacuum detection box 35, a battery shell butt joint hose 39 is fixedly arranged on the inner wall of the first vacuum detection box 35, the battery shell butt joint hose 39 is in communication with the second electric control vacuum ball valve 38, a third electric control vacuum ball valve 41 is fixedly and communicatively installed at the top of a second vacuum detection box 40, flange pipes are fixedly arranged on the left side of the first vacuum detection box 35 and the right side of the second vacuum detection box 40, and two end sensors of a differential pressure sensor 42 are fixedly and communicatively connected with the flange pipes of the first vacuum detection box 35 and the second vacuum detection box 40 through flanges.

[0044] A clamping block is arranged on the inner wall of the first vacuum detection box 35, which is used for fixing the battery shell, the internal width dimension of the first vacuum detection box 35 should match the battery shell, so as to prevent the movement of the battery shell forward and backward during the test.

[0045] Working principle: Put the battery shell into the first vacuum detection box 35, connect the battery shell to the test air port of the hose 39, then close the sealing cover 36 to complete the sealing of the first vacuum detection box 35, then connect the external vacuum pump to the first electrically controlled vacuum ball valve 37 and the third electrically controlled vacuum ball valve 41 in turn and sequentially vacuumize, during which the second electrically controlled vacuum ball valve 38 remains closed, during which the vacuumization rate of the first vacuum detection box 35 and the second vacuum detection box 40 can be observed, if the vacuumization rate of the first vacuum detection box 35 is too slow under the same power, it is considered that the battery shell has a gas leakage;

[0046] If the vacuumization rate is the same, after vacuumization, the first electrically controlled vacuum ball valve 37 and the third electrically controlled vacuum ball valve 41 are closed, the differential pressure sensor 42 is confirmed, the air pump is connected to the second electrically controlled vacuum ball valve 38 to start inflating the battery shell, at this time the differential pressure value of the differential pressure sensor 42 can be observed, if it changes, it proves that the battery shell has poor airtightness;

[0047] If the value does not change, at this time the alternating current motor 20 can be started to drive the rotating shaft 21 to rotate, the two agitating simulation rollers 23 rotate around the rotating shaft 21, the two agitating simulation rollers 23 rotate in turn and contact the bottom surface of the suspension plate 6 and push it upward, the four spring telescopic rods 4 cooperate with the first hinge seat 5 to make the first vacuum detection box 35 realize a certain frequency of agitation effect, simulate the bumpy road conditions in the driving process, at this time the differential pressure value of the differential pressure sensor 42 can be observed whether it changes;

[0048] If the value is constant, pause the AC motor 20, install the pitch handle 29 to the transmission pressure rod 28, start the AC motor 20 again, the rotating shaft 21 drives the first sprocket 24 to rotate, the first sprocket 24 drives the second sprocket 25, the third sprocket 26 and the fourth sprocket 27 in turn under the assistance of the chain, the rotation of the fourth sprocket 27 drives the transmission pressure rod 28 to rotate, the transmission pressure rod 28 intermittently contacts and presses the front end of the transmission rocker 31, and the transmission pressure rod 28 will be separated from the transmission rocker 31 with the continuous rotation of the transmission pressure rod 28, with the up and down rotation of the transmission rocker 31, the rubber knocking hammer of the knocking rod 32 will first rise and then fall, knocking the outside of the first vacuum detection box 35, different lengths of the pitch handle 29 can be selected according to the situation, that is, the rising height of the rubber knocking hammer of the knocking rod 32 can be changed, and the knocking force can be adjusted, and in the process, the connecting plate 14 of the circular table fixing device 11 is pinched upwards, the limiting pin 18 can be lowered and extracted from the positioning pin hole group 19, at this time, the rotating circular table 9 can be rotated to change the knocking position, after the circular table fixing device 11 is loosened, the limiting pin 18 will resist the bottom surface of the rotating circular table 9 under the action of the torsional spring 15, at this time, the rotating circular table 9 is continuously rotated until the other set of positioning pin hole groups 19 are aligned, and then the limiting pin 18 is reinserted to fix the rotating circular table 9, and in the process, whether the differential pressure value of the differential pressure sensor 42 changes or not is observed, which simulates the situation that the battery shell is indirectly knocked and collided.

[0049] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or equivalent replacement for part of the technical features described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for detecting the airtightness of a new energy battery casing, comprising an operating platform base (1), characterized in that, The top of the operating table base (1) is fixedly welded to the top of the left and right ends by support columns. The two top frame plates (3) are movably provided with spring telescopic rods (4) at the front and rear ends of the bottom of the two adjacent ends. A suspension plate (6) is movably provided above the center of the top surface of the operating table base (1). The bottom of the four spring telescopic rods (4) is movably connected to the four corners of the top surface of the suspension plate (6). A frustum groove (7) is opened in the center of the top surface of the suspension plate (6). A rotating frustum (9) is rotatably provided in the center of the frustum groove (7). A frustum fixing device (11) is installed at the center of the front end of the bottom of the suspension plate (6). A group of positioning pin holes (19) is opened at equal intervals on the edge of the bottom surface of the rotating frustum (9). A group of limit pin holes (10) is opened through the edge of the middle of the front end of the bottom of the frustum groove (7). A first vacuum detection box (35) is installed at the center of the top surface of the rotating frustum (9). A support platform is fixedly welded to the left end of the top surface of the operating table base (1). A second vacuum detection box (40) is fixedly installed on the top surface of the support platform. A differential pressure sensor (42) is connected in series between the second vacuum detection box (40) and the first vacuum detection box (35). Two bouncy simulation rollers (23) are movably arranged below the suspension plate (6). An AC motor (20) is fixedly installed at the top center of the front of the inner wall of the operating platform base (1) by bolts. The rotating shaft of the AC motor (20) is connected to the two bouncy simulation rollers (23) in a transmission connection. A transmission pressure rod (28) is rotatably arranged above the right front end of the operating platform base (1). The transmission pressure rod (28) is connected to the rotating shaft of the AC motor (20) in a transmission connection. A striking rod (32) is rotatably arranged between the two top frame plates (3). The top surface of the operating table base (1) has a simulated component opening (2) and a rotating shaft (21) is rotatably installed at the center of the top of the inner wall of the operating table base (1). The two turbulent simulated rollers (23) are not equidistant from the center of the rotating shaft (21). The other end of the transmission pressure rod (28) is provided with an adjustment handle (29). The connecting end of the adjustment handle (29) is coaxially welded with a threaded rod. The other end of the transmission pressure rod (28) is provided with an internal threaded hole. The adjustment handle (29) is detachably connected to the transmission pressure rod (28) through the threaded rod and the internal threaded hole. The top of the striking rod (32) is fixedly welded with a transmission shaft (30). The two ends of the transmission shaft (30) are respectively rotatably connected to the middle between the two top frame plates (3). The right end of the front of the transmission shaft (30) is fixedly welded with a transmission rocker (31). The bottom end of the striking rod (32) is fixedly provided with a rubber striking hammer. The center of the top surface of the rotating frustum (9) is provided with a limiting square groove (33). The inner wall of the limiting square groove (33) is fixedly provided with connecting springs (34) at equal intervals. The outer bottom end of the first vacuum detection box (35) is fixedly connected to each connecting spring (34).

2. The airtightness testing device for a new energy battery casing according to claim 1, characterized in that, First hinge seats (5) are fixedly provided at the front and rear ends of the bottom of the two top frame plates (3) that are close to each other and at the four corners of the top surface of the suspension plate (6). The top and bottom ends of each spring telescopic rod (4) are rotatably connected to the top frame plate (3) and the suspension plate (6) through the first hinge seats (5).

3. The airtightness testing device for a new energy battery casing according to claim 1, characterized in that, A bearing (8) is fixedly installed at the center of the bottom surface of the frustum groove (7). The bottom surface of the outer ring of the bearing (8) is fixedly connected to the bottom surface of the frustum groove (7). The center of the bottom surface of the rotating frustum (9) is fixedly connected to the top surface of the inner ring of the bearing (8). The limiting pin hole group (10) consists of two limiting pin holes. Each positioning pin hole group (19) consists of two positioning pin holes. The inner diameters of the limiting pin holes and the positioning pin holes are the same, and the limiting pin hole group (10) can be aligned with each positioning pin hole group (19).

4. The airtightness testing device for a new energy battery casing according to claim 1, characterized in that, The truncated cone fixing device (11) includes a second hinge seat (12). The top of the second hinge seat (12) is fixedly connected to the middle of the front end of the bottom surface of the suspension plate (6). Two paddle side plates (13) are rotatably installed inside the bottom end of the second hinge seat (12). A connecting plate (14) is fixedly welded between the front ends of the two paddle side plates (13). A torsion spring (15) is provided at the top of the second hinge seat (12). The bottom and top of the torsion spring (15) are fixedly connected to the connecting plate (14) and the suspension plate (6) respectively.

5. The airtightness testing device for a new energy battery casing according to claim 4, characterized in that, The rear ends of the two paddle side plates (13) are provided with limit grooves (16). The rear ends of the paddle side plates (13) are also provided with linkage rods (17). The linkage rods (17) pass through the two limit grooves (16) and are fixedly welded with limit pins (18) at both ends. The outer diameter of the two limit pins (18) is equal to the inner diameter of the limit pin hole group (10) and each positioning pin hole group (19). The length of the limit pins (18) is greater than the length of the limit pin hole group (10), and the two limit pins (18) are internally slidably connected to the limit pin hole group (10).

6. The airtightness testing device for a new energy battery casing according to claim 1, characterized in that, The rotating shaft (21) is located below the simulated component opening (2). The front and rear ends of the rotating shaft (21) are fixedly welded with linkage side plates (22). The two linkage side plates (22) are located at the front and rear ends inside the simulated component opening (2). The two turbulent simulated rollers (23) are rotatably connected to the opposite surfaces between the two ends of the linkage side plates (22).

7. The airtightness testing device for a new energy battery casing according to claim 6, characterized in that, A bevel gear is coaxially fixed at the front end of the rotating shaft (21), and a bevel gear is also coaxially fixed at the top end of the rotating shaft of the AC motor (20). The two bevel gears mesh with each other. A first transmission chamber (101) is fixedly welded to the upper right end of the outer front of the operating table base (1). A second transmission chamber (102) is fixedly welded to the right end of the top surface of the first transmission chamber (101). A transmission pressure rod (28) is rotatably installed on the top front of the second transmission chamber (102).

8. The airtightness testing device for a new energy battery casing according to claim 7, characterized in that, A first sprocket (24) is rotatably mounted on the left end inside the first transmission chamber (101), and a second sprocket (25) and a third sprocket (26) are rotatably mounted on the right end inside the first transmission chamber (101). The second sprocket (25) and the third sprocket (26) are coaxially fixedly connected. The first sprocket (24) is coaxially fixedly connected to the rotating shaft (21). The first sprocket (24) and the second sprocket (25) are connected by chain drive. A fourth sprocket (27) is rotatably mounted on the top end inside the second transmission chamber (102). The fourth sprocket (27) and the third sprocket (26) are connected by chain drive. The rotating center shaft end of the transmission pressure rod (28) is coaxially fixedly connected to the fourth sprocket (27).

9. The airtightness testing device for a new energy battery casing according to claim 1, characterized in that, The top of the first vacuum detection box (35) is detachably provided with a sealing cover (36). A first electrically controlled vacuum ball valve (37) is fixedly installed in the middle of the top surface of the sealing cover (36). A second electrically controlled vacuum ball valve (38) is fixedly installed on the outer front of the first vacuum detection box (35). A battery housing docking hose (39) is fixedly provided on the inner wall front of the first vacuum detection box (35). The battery housing docking hose (39) is connected to the second electrically controlled vacuum ball valve (38). A third electrically controlled vacuum ball valve (41) is fixedly installed on the top surface of the second vacuum detection box (40). Flange pipes are fixedly provided on the left side of the first vacuum detection box (35) and the right side of the second vacuum detection box (40). The two ends of the differential pressure sensor (42) are fixedly connected to the flange pipes of the first vacuum detection box (35) and the second vacuum detection box (40) through the flanges respectively.

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