Battery pack shell detection equipment

Abstract

The present invention discloses a battery pack shell detection device, which belongs to the technical field of battery pack shell air tightness detection, and comprises a test unit, wherein the test unit is equipped with a vacuum adsorption unit, a shell to be detected is placed on the top of the inner cavity of the test unit via a table, an adapter unit is installed in the shell, and a sealing unit is sleeved on the outer wall of the adapter unit; through the provided adapter unit and the sealing unit, it is realized that the shell joint is sealed from the inside, so that during the immersion test, water entering the shell from the leakage point cannot splash, and it is possible to observe whether the shell is sealed through a humidity card, and the specific leakage point can be observed, and at the same time, after repair, the shell fixed by the vacuum adsorption unit can be driven by a rotating joint to adjust to a downward tilted state on one side after repair, so that during water immersion, only this side can be immersed in water for testing.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack shell air tightness detection, and in particular to a battery pack shell detection device. Background Art

[0002] The shapes of battery pack shells are mainly divided into three types: cylindrical, square and soft-pack. For square battery pack shells, metal is used as the shell material, and the shape is a cube or a rectangular parallelepiped. Compared with cylindrical batteries, square batteries have stronger plasticity and can be customized according to the specific needs of the products they are equipped with.

[0003] The sealing of the battery pack shell is a key indicator of the quality of the entire power battery pack, so the battery pack shell needs to be tested for sealing.

[0004] When testing the sealing of a square battery pack shell with a cubic shape, a water immersion method is commonly used. However, when using the water immersion method to test, although it is possible to visually see whether there is a leak in the shell by observing whether there are bubbles coming out of the outside of the shell, or by opening the shell after immersion and observing whether there are water marks from the inside of the shell, the water will splash after entering the shell through the gap, making it impossible to know the specific leakage location, which brings difficulties to subsequent repairs. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that during a water immersion test, although it is possible to visually see whether there is a leak in the shell by observing whether there are bubbles coming out from the outside of the shell, or by opening the shell after immersion and observing whether there are water marks from the inside of the shell, water will splash after entering the shell through the gap, making it impossible to know the specific leakage location, thereby bringing difficulties to subsequent repairs. A battery pack shell detection device is proposed to solve the problem that during a water immersion test, although it is possible to visually see whether there is a leak in the shell by observing whether there are bubbles coming out from the outside of the shell, or by opening the shell after immersion and observing whether there are water marks from the inside of the shell.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A battery pack shell detection device, comprising a test unit, the test unit is equipped with a vacuum adsorption unit, the top of the inner cavity of the test unit is provided with a platform on which a shell to be detected is placed, the shell is equipped with an adapter unit, and the outer wall of the adapter unit is sleeved with a sealing unit;

[0008] The adapting unit comprises a mounting plate and a pitch-changing component mounted on the mounting plate, wherein the pitch-changing component is connected to a fitting component via a telescopic rod;

[0009] The fitting assembly includes a middle rod fixed to the telescopic rod, the middle rod has two installation cavities inside, an extension rod is inserted into the installation cavity, a side rod is fixed to one end of the extension rod, and an installation cavity is opened on the outer wall of the extension rod;

[0010] A plurality of abutting blocks are slidably connected in the installation cavity, a plurality of first springs are fixed to a side wall of the installation cavity, and one end of the first spring is fixed to the abutting block;

[0011] The sealing unit comprises a sealing ring sleeved on the outer surface of the middle rod and the side rod, a plurality of splash-proof grooves distributed at equal intervals are opened on the outer wall of the sealing ring, and a display component is fixedly connected to the inner bottom wall of the splash-proof groove;

[0012] The fitting component drives the sealing ring to press against the seam of the inner wall of the shell under the drive of the variable pitch component, so that after the test unit performs a water immersion test on the shell, it can observe whether the shell is sealed through the display component and the specific leakage point can be observed.

[0013] As a further description of the above technical solution:

[0014] The test unit includes a base, an immersion box is placed on the base, a transverse slide groove is opened on the top of the inner wall of the immersion box, the table plate is slidably assembled in the transverse slide groove, vertical rods are fixed at the four corners of the upper surface of the base, and a top plate is fixed to the top ends of the four vertical rods.

[0015] As a further description of the above technical solution:

[0016] The top plate is equipped with an electric hydraulic rod, one end of which is fixed with a rotating joint;

[0017] The rotating joint comprises a base, a limiting seat is fixed to the base by bolts, a ball joint is assembled in the base and the limiting seat, and the top end of the ball joint is fixed to one end of the electric hydraulic rod;

[0018] A plurality of positioning screw holes are provided on the front, back and both sides of the ball joint, and a plurality of positioning bolts matching the positioning screw holes are threadedly penetrated on the outer wall of the limiting seat, so that the ball joint is fixed in the limiting seat after rotation.

[0019] As a further description of the above technical solution:

[0020] The adapter unit also includes internally threaded vertical pipes fixed at the four corners of the upper and lower surfaces of the mounting plate, the internal threads of the internally threaded vertical pipes are connected with threaded pillars, and one end of the threaded pillars is fixed with a support plate.

[0021] As a further description of the above technical solution:

[0022] The pitch-changing assembly comprises a toothed disc rotatably connected to the middle of the upper surface of the mounting disc, a motor is fixed to the middle of the lower surface of the mounting disc, the output end of the motor is connected to the toothed disc, a power supply box is fixed to the lower surface of the mounting disc, and a battery for powering the motor is installed in the power supply box;

[0023] The upper surface of the mounting plate is provided with a limiting slide groove matched with the telescopic rod, and the telescopic rod is slidably assembled in the limiting slide groove. The upper surface of the toothed plate is provided with a plurality of guide grooves, and guide columns are inserted in the guide grooves. The bottom ends of the guide columns are fixed to the telescopic rod.

[0024] As a further description of the above technical solution:

[0025] A plurality of adjusting studs are threadedly provided at the edge of the upper surface of the mounting plate, a retaining groove is provided inside the adjusting stud, a winding and unwinding column is rotatably connected in the retaining groove, two driven gears meshing with the toothed disc are fixedly provided on the winding and unwinding column, and a guide rope is wound around the middle of the outer surface of the winding and unwinding column;

[0026] A second spring is fixed to the other end of the extension rod, and the other end of the second spring is fixed to the inner wall of the installation cavity. A rope guide frame is fixed to the side of the upper surface of the telescopic rod away from the toothed disc and to the outer wall of the installation disc, and two rope guide columns are rotatably connected in the rope guide frame;

[0027] One end of the guide rope passes through the guide rope frame and the middle rod in sequence and enters the installation cavity to be fixed with the extension rod.

[0028] As a further description of the above technical solution:

[0029] The display assembly comprises a connecting head fixedly connected to the bottom wall of the anti-splash tank, one end of the connecting head is threadedly sleeved with a receiving tube, and a humidity card is arranged in the receiving tube.

[0030] As a further description of the above technical solution:

[0031] The vacuum adsorption unit comprises a hollow mounting part, a lower surface of which is fixedly connected with a plurality of vacuum suction cups, and a vacuum device is mounted on the top plate, and the vacuum device is connected with the hollow mounting part through a connecting pipe.

[0032] As a further description of the above technical solution:

[0033] An embedding groove is provided in the middle of the outer surface of the abutting block, a rolling column is rotatably connected in the embedding groove, and an inclined surface is formed at the edge of the outer wall of the abutting block.

[0034] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0035] The adapter unit and the sealing unit are provided to seal the shell joints from the inside, so that water entering the shell from the leakage point cannot splash during the immersion test. The humidity card can be used to observe whether the shell is sealed and the specific leakage point can be observed.

[0036] Before testing, open the shell and place the adapter unit in the inner cavity of the shell. Then, the pitch-changing component can drive the sealing ring to gradually abut against the joint. It can also adapt to square shells of different sizes. Then, after reclosing and fixing the shell, perform a water immersion test. During the test, when leakage occurs, water flows inward through the gap and is then blocked by the splash-proof groove on the outer wall of the sealing ring to avoid splashing. At the same time, when the water in the groove falls on the surface of the humidity card, it will change color. After opening the shell, directly observe which position of the humidity card changes color, and you can accurately know the specific leakage point, which is convenient for subsequent repairs.

[0037] At the same time, after repair, the shell fixed by the vacuum adsorption unit can be driven by the rotating joint to adjust the repaired side to a downward tilted state, so that when immersed in water, only this side can be immersed in water for testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It shows a schematic diagram of a structure provided in a three-dimensional manner according to an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the structure inside a housing provided according to an embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram showing the structural disassembly of a rotating joint provided in an embodiment of the present invention is shown;

[0041] Figure 4 A schematic diagram showing a first viewing angle of an installation position of a sealing unit provided in an embodiment of the present invention is shown;

[0042] Figure 5 A schematic diagram showing a second viewing angle of an installation position of a sealing unit provided in an embodiment of the present invention;

[0043] Figure 6 A schematic structural diagram of a pitch-changing assembly according to an embodiment of the present invention is shown;

[0044] Figure 7 A schematic structural diagram of a sealing unit provided according to an embodiment of the present invention is shown;

[0045] Figure 8 Shows a schematic structural diagram of a bonding assembly according to an embodiment of the present invention;

[0046] Fig. 9It shows a schematic structural diagram of a winding and unwinding column provided according to an embodiment of the present invention;

[0047] Fig.10 The embodiment of the present invention provides Figure 2 The enlarged structural diagram at A in the middle;

[0048] Fig.11 The embodiment of the present invention provides Figure 6 Schematic diagram of the enlarged structure at point B.

[0049] Legend:

[0050] 10. Test unit; 11. Base; 12. Immersion tank; 13. Top plate; 14. Table; 15. Electric hydraulic rod; 16. Rotating joint; 161. Base; 162. Limit seat; 163. Ball joint; 164. Positioning bolt;

[0051] 20. Vacuum adsorption unit; 21. Hollow mounting piece; 22. Vacuum suction cup; 23. Vacuum equipment; 24. Connecting pipe;

[0052] 30. Shell;

[0053] 40. Adaptation unit; 41. Mounting plate; 42. Pitch-changing assembly; 421. Toothed plate; 422. Guide groove; 423. Guide column; 424. Motor; 425. Telescopic rod; 426. Adjusting stud; 427. Winding column; 428. Driven gear; 429. Guide rope; 43. Fitting assembly; 431. Middle rod; 432. Extension rod; 433. Side rod; 434. Abutment block; 435. First spring; 436. Second spring; 437. Rolling column; 438. Inclined surface; 44. Internally threaded vertical pipe; 45. Threaded pillar; 46. Support plate; 47. Battery; 48. Guide rope frame;

[0054] 50. Sealing unit; 51. Sealing ring; 52. Splashproof groove; 53. Display component; 531. Connecting head; 532. Receiving tube; 533. Humidity card. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] Embodiment 1: Figure 1 - Fig.11 As shown, the present invention provides:

[0057] A battery pack shell detection device, comprising a test unit 10, the test unit 10 is equipped with a vacuum adsorption unit 20, the top of the inner cavity of the test unit 10 is provided with a platen 14 to place a shell 30 to be detected, the shell 30 is equipped with an adapter unit 40, and the outer wall of the adapter unit 40 is provided with a sealing unit 50;

[0058] The fitting component 43, driven by the variable pitch component 42, drives the sealing ring 51 to press against the inner wall joint of the shell 30, so that after the test unit 10 performs a water immersion test on the shell 30, it can be observed through the display component 53 whether the shell 30 is sealed and the specific leakage point can be observed.

[0059] like Figure 1 and Figure 2 The test unit 10 includes a base 11, on which a water immersion box 12 is placed, a transverse slide groove is provided at the top of the inner wall of the water immersion box 12, a table 14 is slidably assembled in the transverse slide groove, four corners of the upper surface of the base 11 are fixed with vertical rods, the top ends of the four vertical rods are commonly fixed with a top plate 13, and an electric hydraulic rod 15 is assembled on the top plate 13;

[0060] In the initial state, the table 14 is slid to one side of the immersion tank 12, and then the shell 30 to be tested is placed on the surface of the table 14. After the adapter unit 40 is installed, it is slid inward to the bottom of the vacuum adsorption unit 20. After the shell 30 is adsorbed and fixed, the table 14 is slid out to the outside of the immersion tank 12. After the test is completed, the shell 30 is lifted by the electric hydraulic rod 15, and then the table 14 is slid to the bottom of the shell 30 to release the adsorption of the shell 30.

[0061] like Figure 1 and Figure 2 The vacuum adsorption unit 20 includes a hollow mounting member 21, a plurality of vacuum suction cups 22 are fixedly connected to the lower surface of the hollow mounting member 21, a vacuum device 23 is mounted on the top plate 13, and the vacuum device 23 is connected to the hollow mounting member 21 through a connecting pipe 24;

[0062] Preferably, the vacuum device 23 is a vacuum pump, and its working principle is: by starting the vacuum device 23 to suck, negative air pressure is generated in the vacuum suction cup 22, so that the shell 30 to be inspected is firmly sucked, and the shell 30 can begin to be moved. When releasing, air is steadily inflated into the vacuum suction cup 22, so that the negative air pressure in the vacuum suction cup 22 changes to zero air pressure or slightly positive air pressure, and the vacuum suction cup 22 is separated from the shell 30.

[0063] like Figure 2 , Figure 4 and Fig.10The sealing unit 50 includes a sealing ring 51 sleeved on the outer surface of the middle rod 431 and the side rod 433, and a plurality of splash-proof grooves 52 distributed at equal intervals are opened on the outer wall of the sealing ring 51, and a display component 53 is fixedly connected to the inner bottom wall of the splash-proof groove 52;

[0064] like Figure 7 The display assembly 53 includes a connecting head 531 fixedly connected to the inner bottom wall of the splashproof groove 52, one end of the connecting head 531 is threadedly sleeved with a receiving tube 532, and a humidity card 533 is arranged in the receiving tube 532;

[0065] During the water immersion test, the sealing ring 51 is always attached to the seam of the inner wall of the housing 30 to wrap the seam, so as to prevent the water entering the housing 30 from splashing around when the housing 30 leaks during the test;

[0066] When leakage occurs, water that enters the shell 30 through the gap will enter the splash guard 52 for collection, and will flow into the receiving tube 532 through the connecting head 531, and finally contact the humidity card 533, causing the humidity card 533 to change color. When the test is completed, open the shell 30 and observe whether the humidity card 533 changes color, that is, it can be known whether the shell 30 is sealed. If it is not sealed, the specific leakage location can be known through the humidity card 533.

[0067] like Figure 2 , Figure 4 , Figure 5 and Figure 6 The adapting unit 40 includes a mounting plate 41 and a pitch-changing assembly 42 mounted on the mounting plate 41, and a fitting assembly 43 is connected to the pitch-changing assembly 42 via a telescopic rod 425. The adapting unit 40 also includes an internally threaded vertical pipe 44 fixed at the four corners of the upper surface and the lower surface of the mounting plate 41, and the internal threads of the internally threaded vertical pipe 44 are connected to a threaded pillar 45, and a support plate 46 is fixed to one end of the threaded pillar 45;

[0068] After the adapter unit 40 is placed in the housing 30, the height of the mounting plate 41 is adjusted by rotating the threaded support 45 located on the lower surface of the mounting plate 41, so that the height of the splash-proof groove 52 at the middle position of the outer wall of the sealing ring 51 corresponds to the joint of the housing 30. Fig.10 As shown;

[0069] At this time, the threaded support 45 located on the upper surface of the mounting plate 41 is rotated again so that the support plate 46 at the top of the threaded support 45 can abut against the inner top wall of the shell 30 after the shell 30 is closed, thereby allowing the adapter unit 40 to be fixed inside the shell 30 after the shell 30 is closed.

[0070] like Figure 4 and Figure 6The pitch-changing assembly 42 includes a toothed disc 421 rotatably connected to the middle of the upper surface of the mounting disc 41, a motor 424 is fixed to the middle of the lower surface of the mounting disc 41, and the output end of the motor 424 is connected to the toothed disc 421. A power supply box is fixed to the lower surface of the mounting disc 41, and a battery 47 for powering the motor 424 is installed in the power supply box. Preferably, the motor 424 is a servo motor;

[0071] The upper surface of the mounting plate 41 is provided with a limit slide groove adapted to the telescopic rod 425, and the telescopic rod 425 is slidably assembled in the limit slide groove. The upper surface of the toothed plate 421 is provided with a plurality of guide grooves 422, and guide posts 423 are inserted into the guide grooves 422, and the bottom ends of the guide posts 423 are fixed to the telescopic rod 425.

[0072] Two driven gears 428 meshing with the toothed disc 421 are fixedly sleeved on the winding and unwinding column 427, a guide rope 429 is wound around the middle of the outer surface of the winding and unwinding column 427, a second spring 436 is fixed to the other end of the extension rod 432, and the other end of the second spring 436 is fixed to the inner wall of the installation cavity;

[0073] A guide rope frame 48 is fixed on the side of the upper surface of the telescopic rod 425 away from the toothed disc 421 and on the outer wall of the mounting disc 41. Two guide rope columns are rotatably connected in the guide rope frame 48. One end of the guide rope 429 passes through the guide rope frame 48 and the middle rod 431 in sequence and enters the mounting cavity to be fixed with the extension rod 432. The guide rope 429 passes between the two guide rope columns, and the guide rope columns can guide the guide rope 429.

[0074] like Figure 8 and Fig.11 The fitting assembly 43 includes a middle rod 431 fixed to the telescopic rod 425, and two installation cavities are provided inside the middle rod 431. An extension rod 432 is inserted into the installation cavity. A side rod 433 is fixed to one end of the extension rod 432, and an installation cavity is provided on the outer wall of the extension rod 432;

[0075] A plurality of abutting blocks 434 are slidably connected in the installation cavity, a plurality of first springs 435 are fixed to a side wall of the installation cavity, and one end of the first spring 435 is fixed to the abutting block 434;

[0076] When the initial position of the sealing ring 51 does not match the inner cavity of the housing 30, after the position of the mounting plate 41 is adjusted according to the above operation steps, the motor 424 is started to drive the toothed plate 421 to rotate clockwise, and at this time, the telescopic rod 425 is driven to extend outward under the action of the guide groove 422, so that the fitting component 43 moves together, and at the same time, the toothed plate 421 drives the driven gear 428 to rotate counterclockwise, so that the winding column 427 gradually contacts the restraint of the guide rope 429;

[0077] At this time, under the action of the elastic force of the second spring 436 in a compressed state, the extension rod 432 is driven to gradually move outward from the middle rod 431. In the process of gradually moving out, driven by the elastic force of the first spring 435 in a compressed state, the abutting block 434 on the outer wall of the outwardly extending part of the outwardly extending rod 432 is extended outward and abuts against the sealing ring 51, thereby preventing the extended part from losing its abutting force on the sealing ring 51, ensuring that the sealing ring 51 can always maintain a close fit with the inner wall of the shell 30 after extension, and when the sealing ring 51 abuts against the inner wall of the shell 30, the motor 424 is turned off.

[0078] like Fig.11 An embedding groove is provided in the middle of the outer surface of the push block 434, a rolling column 437 is rotatably connected in the embedding groove, and an inclined surface 438 is formed at the edge of the outer wall of the push block 434;

[0079] When the extension rod 432 extends outward or moves inward, the rolling column 437 on its surface can roll the sealing ring 51 and cooperate with the inclined surface 438 to flatten the wrinkles that may appear when the sealing ring 51 shrinks after deformation.

[0080] Embodiment 2: as Figure 5 , Figure 6 and Fig. 9 A plurality of adjusting studs 426 are threadedly provided at the edge of the upper surface of the mounting plate 41, and a retaining groove is provided inside the adjusting stud 426, and a winding and unwinding column 427 is rotatably connected in the retaining groove;

[0081] Specifically, when the sealing test of the rectangular housing 30 is required, the telescopic rod 425 is extended and retracted to match the length-width ratio of the four fitting components 43 with the rectangular housing 30 to be tested, and then the two adjusting screws 426 corresponding to one of the long sides are rotated to move the corresponding winding and unwinding column 427 upward, so that the driven gear 428 on its surface is out of meshing state with the toothed disc 421, and the driven gear 428 is no longer restricted at this time;

[0082] At this time, under the action of the elastic force of the second spring 436, the extension rod 432 is driven to gradually move outward from the middle rod 431 until the side rod 433 on the extension rod 432 abuts against the side rod 433 of the short side. During the gradual moving out process, driven by the elastic force of the first spring 435, the abutting block 434 on the outer wall of the outwardly extending portion of the outwardly extending rod 432 is extended outward and abuts against the sealing ring 51. At this time, the two adjusting screws 426 are rotated in the opposite direction to make the corresponding winding and unwinding rods 427 move downward and reset. At this time, the disengaged driven gear 428 is re-engaged with the toothed disc 421, and then the above operation is repeated to adjust the other long side.

[0083] After the adjustment is completed, the adapter unit 40 is placed in the housing 30, and then the threaded pillar 45 located on the lower surface of the mounting plate 41 is rotated to adjust the height of the mounting plate 41, so that the height of the splash-proof groove 52 at the middle position of the outer wall of the sealing ring 51 corresponds to the joint of the housing 30. At this time, the threaded pillar 45 located on the upper surface of the mounting plate 41 is rotated again, so that the support plate 46 at the top of the threaded pillar 45 can be against the inner top wall of the housing 30 after the housing 30 is closed, so that the adapter unit 40 can be fixed inside the housing 30 after the housing 30 is closed;

[0084] Then, the motor 424 is started to drive the toothed disc 421 to rotate clockwise. At this time, the telescopic rod 425 is driven to extend outward under the action of the guide groove 422, so that the fitting assembly 43 moves together. At the same time, the toothed disc 421 drives the driven gear 428 to rotate counterclockwise, so that the winding column 427 gradually contacts the guide rope 429.

[0085] At this time, under the elastic force of the second spring 436 in the compressed state, the extension rod 432 is driven to gradually move outward from the middle rod 431, and the motor 424 is turned off when the sealing ring 51 hits the inner wall of the housing 30;

[0086] At this time, the shell 30 is closed again, and then the shell 30 is sucked by the vacuum suction cup 22, and then the shell 30 is sent into the immersion tank 12 by the electric hydraulic rod 15 for a sealing test. After the test, it is taken out, and then the shell 30 is opened for observation to find out whether it is sealed and the leakage location.

[0087] Embodiment three: as Figure 2 and Figure 3 , a rotating joint 16 is fixed to one end of the electric hydraulic rod 15;

[0088] The rotating joint 16 includes a base 161, a limiting seat 162 is fixed to the base 161 by bolts, a ball joint 163 is assembled in the base 161 and the limiting seat 162, and the top of the ball joint 163 is fixed to one end of the electric hydraulic rod 15;

[0089] The front, back and both sides of the ball joint 163 are provided with a plurality of positioning screw holes, and the outer wall of the limiting seat 162 is threaded with a plurality of positioning bolts 164 adapted to the positioning screw holes, so that the ball joint 163 is fixed in the limiting seat 162 after rotation;

[0090] After the shell 30 with sealing problems is repaired, if the leakage position is only on one side, after the vacuum adsorption unit 20 adsorbs the repaired shell 30, the positioning bolt 164 is loosened to release the restriction on the ball joint 163, and then the shell 30 is rotated to tilt the side of the leakage position downward, and then the positioning bolt 164 is tightened to fix the position of the ball joint 163. In this state, when immersed in water, one side of the leakage position can be submerged in water for testing.

[0091] Specifically, when the battery pack shell detection device is working / in use:

[0092] First, place the shell 30 to be tested on the surface of the table 14, then open the shell 30 and place the adapter unit 40 in the inner cavity of the shell 30, and adjust the height of the mounting plate 41 by rotating the threaded pillar 45 located on the lower surface of the mounting plate 41, so that the height of the splash-proof groove 52 at the middle position of the outer wall of the sealing ring 51 corresponds to the joint of the shell 30, and then rotate the threaded pillar 45 located on the upper surface of the mounting plate 41, so that the support plate 46 at the top of the threaded pillar 45 can be against the inner top wall of the shell 30 after the shell 30 is closed, so that the adapter unit 40 can be fixed inside the shell 30 after the shell 30 is closed;

[0093] When the initial position of the sealing ring 51 does not match the inner cavity of the housing 30, the start motor 424 drives the toothed disc 421 to rotate clockwise, and at this time, the telescopic rod 425 is driven to extend outward under the action of the guide groove 422, so that the fitting component 43 moves together, and at the same time, the toothed disc 421 drives the driven gear 428 to rotate counterclockwise, so that the winding column 427 gradually contacts the restraint of the guide rope 429;

[0094] At this time, under the action of the elastic force of the second spring 436 in the compressed state, the extension rod 432 is driven to gradually move outward from the middle rod 431. In the process of gradually moving out, driven by the elastic force of the first spring 435 in the compressed state, the abutting block 434 on the outer wall of the outwardly extending portion of the outwardly extending rod 432 is extended outward and abuts against the sealing ring 51, ensuring that the sealing ring 51 can always keep a close fit with the inner wall of the shell 30 after extension. When the sealing ring 51 abuts against the inner wall of the shell 30, the motor 424 is turned off, and the shell 30 is closed at this time;

[0095] Then, the housing 30 is fixed by the vacuum adsorption unit 20. After fixation, the platform 14 is slid out to one side. At this time, the electric hydraulic rod 15 is started to drive the housing 30 to move downward and gradually immerse it in the immersion tank 12, so that the housing 30 is immersed in water. After a certain period of testing, the housing 30 is raised, and then the platform 14 is slid under the housing 30. At this time, the vacuum adsorption unit 20 is released from fixing the housing 30.

[0096] Then open the housing 30 and directly observe whether the humidity card 533 changes color, so as to accurately know whether it is sealed and the specific leakage point.

[0097] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A battery pack shell detection device, comprising a test unit (10), wherein a vacuum adsorption unit (20) is mounted on the test unit (10), characterized in that: The top of the inner cavity of the test unit (10) is provided with a table (14) on which a housing (30) to be tested is placed, an adapting unit (40) is assembled in the housing (30), and a sealing unit (50) is sleeved on the outer wall of the adapting unit (40); The adapting unit (40) comprises a mounting plate (41) and a variable pitch component (42) mounted on the mounting plate (41), wherein the variable pitch component (42) is connected to a fitting component (43) via a telescopic rod (425); The fitting assembly (43) comprises a middle rod (431) fixed to the telescopic rod (425), two installation cavities are provided inside the middle rod (431), an extension rod (432) is inserted into the installation cavities, a side rod (433) is fixed to one end of the extension rod (432), and an installation cavity is provided on the outer wall of the extension rod (432); A plurality of abutting blocks (434) are slidably connected in the installation cavity, a plurality of first springs (435) are fixed to a side wall of the installation cavity, and one end of the first spring (435) is fixed to the abutting block (434); The sealing unit (50) comprises a sealing ring (51) sleeved on the outer surfaces of the middle rod (431) and the side rod (433); a plurality of splash-proof grooves (52) distributed at equal intervals are formed on the outer wall of the sealing ring (51); and a display assembly (53) is fixedly connected to the inner bottom wall of the splash-proof groove (52); The fitting component (43) is driven by the variable pitch component (42) to drive the sealing ring (51) to abut against the inner wall joint of the housing (30), so that after the testing unit (10) performs a water immersion test on the housing (30), it is possible to observe whether the housing (30) is sealed through the display component (53) and to observe the specific leakage point; The pitch-changing assembly (42) comprises a toothed disc (421) rotatably connected to the middle of the upper surface of the mounting disc (41); a motor (424) is fixed to the middle of the lower surface of the mounting disc (41); an output end of the motor (424) is connected to the toothed disc (421); a power supply box is fixed to the lower surface of the mounting disc (41); a battery (47) for supplying power to the motor (424) is installed in the power supply box; The upper surface of the mounting plate (41) is provided with a limiting slide groove adapted to the telescopic rod (425), the telescopic rod (425) is slidably assembled in the limiting slide groove, the upper surface of the toothed plate (421) is provided with a plurality of guide grooves (422), guide posts (423) are inserted into the guide grooves (422), and the bottom ends of the guide posts (423) are fixed to the telescopic rod (425); A plurality of adjusting studs (426) are threadedly provided at the edge of the upper surface of the mounting plate (41), a retaining groove is provided inside the adjusting stud (426), a winding column (427) is rotatably connected in the retaining groove, two driven gears (428) meshing with the toothed plate (421) are fixedly sleeved on the winding column (427), and a guide rope (429) is wound around the middle of the outer surface of the winding column (427); A second spring (436) is fixed to the other end of the extension rod (432), and the other end of the second spring (436) is fixed to the inner wall of the installation cavity. A guide rope frame (48) is fixed to the side of the upper surface of the telescopic rod (425) away from the toothed disc (421) and to the outer wall of the installation disc (41). Two guide rope columns are rotatably connected in the guide rope frame (48). One end of the guide rope (429) passes through the guide rope frame (48), the middle rod (431) in sequence, and enters the installation cavity to be fixed to the extension rod (432).

2. The battery pack shell detection device according to claim 1, characterized in that: The test unit (10) comprises a base (11), on which an immersion box (12) is placed, a transverse slide groove is provided at the top of the inner wall of the immersion box (12), and the table plate (14) is slidably assembled in the transverse slide groove. Vertical rods are fixed at the four corners of the upper surface of the base (11), and a top plate (13) is fixed to the top ends of the four vertical rods.

3. The battery pack shell detection device according to claim 2, characterized in that: An electric hydraulic rod (15) is mounted on the top plate (13), and a rotating joint (16) is fixed to one end of the electric hydraulic rod (15); The rotating joint (16) comprises a base (161), a limiting seat (162) is fixed to the base (161) by means of bolts, a ball joint (163) is assembled in the base (161) and the limiting seat (162), and the top end of the ball joint (163) is fixed to one end of the electric hydraulic rod (15); The front, back and both sides of the ball joint (163) are provided with a plurality of positioning screw holes, and the outer wall of the limiting seat (162) is threaded with a plurality of positioning bolts (164) adapted to the positioning screw holes, so that the ball joint (163) is fixed in the limiting seat (162) after rotation.

4. The battery pack shell detection device according to claim 1, characterized in that: The adapter unit (40) further comprises an internally threaded vertical pipe (44) fixed at four corners of the upper and lower surfaces of the mounting plate (41), the internal threads of the internally threaded vertical pipe (44) being connected to a threaded support column (45), one end of the threaded support column (45) being fixed to a support plate (46).

5. The battery pack shell detection device according to claim 1, characterized in that: The display assembly (53) comprises a connecting head (531) fixedly connected to the inner bottom wall of the anti-splash groove (52), one end of the connecting head (531) being threadedly sleeved with a receiving tube (532), and a humidity card (533) being arranged in the receiving tube (532).

6. The battery pack shell detection device according to claim 2, characterized in that: The vacuum adsorption unit (20) comprises a hollow mounting member (21), a plurality of vacuum suction cups (22) being fixedly connected to the lower surface of the hollow mounting member (21), a vacuum device (23) being mounted on the top plate (13), and the vacuum device (23) being connected to the hollow mounting member (21) via a connecting pipe (24).

7. The battery pack shell detection device according to claim 1, characterized in that: An embedding groove is provided in the middle of the outer surface of the abutting block (434), a rolling column (437) is rotatably connected in the embedding groove, and an inclined surface (438) is formed at the edge of the outer wall of the abutting block (434).

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