A sealing performance testing device and method for a new energy vehicle battery pack

Abstract

The present invention discloses a sealing performance testing device for a new energy vehicle battery pack, which includes a testing chamber. An aqueous solution is provided inside the testing chamber. The inner wall of the testing chamber is respectively rotatably connected with a first reciprocating lead screw and a second reciprocating lead screw. Two sliders are respectively threadedly connected to the side walls of the first reciprocating lead screw and the second reciprocating lead screw, and the side walls of both sliders are slidably connected to the inner wall of the testing chamber. The present invention also discloses a method for testing the sealing performance of a new energy vehicle battery pack, which includes the following steps: S1. Rotate a plurality of bolts to separate them from the testing chamber, and then separate the sealing cover from the frame opening. By the forward rotation of the motor driving the vertical rod to rotate, the driving wheel drives two driven wheels to rotate through the synchronous belt, thereby driving the first reciprocating lead screw and the second reciprocating lead screw to rotate synchronously, and then driving the two sliders to slide upward, so as to move the placement frame out of the frame opening, without manual placement and salvage of the battery pack body, reducing the labor intensity.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack testing, and particularly to a sealing performance testing device and method for a new energy vehicle battery pack. Background Art

[0002] A new energy vehicle refers to a vehicle that uses unconventional vehicle fuels as the power source, integrates advanced technologies in vehicle power control and driving, and forms an advanced technical principle, new technologies, and new structures. It mainly provides energy by storing electrical energy in the battery pack. Currently, in order to cool the battery pack, a liquid cooling system is set at the battery pack, and thus the battery pack needs to have good sealing performance. Once the sealing performance of the battery pack fails, water vapor and coolant will invade the interior of the battery pack, causing irreversible consequences to the company's property and personnel safety.

[0003] Currently, the sealing performance of the battery pack is directly detected by placing it in an aqueous solution and standing for a period of time, and then fishing it out to test the performance. However, the placement and fishing of the battery pack are manually operated, with a large labor intensity, and the detection of the sealing performance of the battery pack is carried out under normal pressure, and the battery pack cannot be tested more strictly, so it cannot be ensured whether the sealing performance of a good battery pack is good after long-term use.

[0004] Based on this, the present invention proposes a sealing performance testing device and method for a new energy vehicle battery pack. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a sealing performance testing device and method for a new energy vehicle battery pack are proposed.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A sealing performance testing device for a new energy vehicle battery pack, comprising a testing chamber. An aqueous solution is provided inside the testing chamber. The inner wall of the testing chamber is respectively rotatably connected with a first reciprocating lead screw and a second reciprocating lead screw. Two sliders are respectively threadedly connected to the side walls of the first reciprocating lead screw and the second reciprocating lead screw. The side walls of the two sliders are both slidably connected to the inner wall of the testing chamber. Two fixing blocks are respectively fixedly connected to the upper ends of the two sliders. A placing frame is fixedly connected to the upper ends of the two fixing blocks together. A battery pack body is placed inside the placing frame. A plurality of first springs are fixedly connected to both inner walls of the placing frame. The ends of the plurality of first springs away from the inner wall of the placing frame are fixedly connected to a clamping plate together. The side wall of the clamping plate is in contact with the side wall of the placing frame. A through hole is opened at the bottom of the placing frame. A driving mechanism for driving the first reciprocating lead screw and the second reciprocating lead screw to rotate synchronously is provided inside the testing chamber. Two supporting plates are fixedly connected to the lower end of the testing chamber. A pressurizing mechanism for pressurizing the testing chamber is provided on one of the supporting plates.

[0008] Preferably, the driving mechanism includes a vertical rod sealingly rotatably connected to the bottom of the testing chamber. A driving wheel is fixedly connected to the upper end of the vertical rod. Two driven wheels are respectively fixedly connected to the side walls of the first reciprocating lead screw and the second reciprocating lead screw. A synchronous belt is connected between the driving wheel and the two driven wheels. A rotating mechanism for driving the vertical rod to rotate is provided on one of the supporting plates.

[0009] Preferably, the rotating mechanism includes a first one-way bearing. The side wall of one of the supporting plates is fixedly connected with a motor through a bracket. The side wall of the movable shaft of the motor is fixedly connected to the outer side wall of the first one-way bearing through a plurality of L-shaped rods. The lower end of the vertical rod penetrates through the lower end of the testing chamber. The side wall of the vertical rod below the testing chamber is fixedly connected to the inner side wall of the first one-way bearing.

[0010] Preferably, the pressurizing mechanism includes a sliding plug cylinder fixedly connected to the side wall of one of the supporting plates. A sliding plate is sealingly slidably connected to the inner wall of the sliding plug cylinder. A second spring is fixedly connected to the side wall of the sliding plate. The end of the second spring away from the sliding plate is elastically connected to the inner wall of the sliding plug cylinder. An air suction pipe is fixedly connected to the inner wall of the sliding plug cylinder. The inner wall of the sliding plug cylinder is communicated with the inner wall of the testing chamber through an air outlet pipe. An extrusion mechanism for extruding the sliding plate is provided on the motor.

[0011] Preferably, the extrusion mechanism includes a second one-way bearing. The side wall of the movable shaft of the motor is fixedly connected to the inner side wall of the second one-way bearing. A cam is fixedly connected to the outer side wall of the second one-way bearing. A cross bar is fixedly connected to the side wall of the sliding plate away from the second spring. A vertical plate is fixedly connected to the end of the cross bar away from the sliding plate. The side wall of the vertical plate is in contact with the side wall of the cam.

[0012] Preferably, a first one-way valve that only allows gas to enter the inner wall of the sliding plug cylinder from the outside is installed in the air suction pipe, and a second one-way valve that only allows gas to enter the test chamber from the sliding plug cylinder is installed in the air outlet pipe.

[0013] Preferably, a frame opening matching the placement frame is provided at the top of the test chamber, and a sealing cover matching the frame opening is connected to the top of the test chamber through a plurality of bolts.

[0014] A method for testing the sealing performance of a new energy vehicle battery pack includes the following steps;

[0015] S1. Rotate a plurality of bolts to separate them from the test chamber, and then separate the sealing cover from the frame opening.

[0016] S2. Drive the motor to rotate forward, thereby moving the placement frame upward and removing it from the frame opening.

[0017] S3. Place the battery pack body to be tested in the placement frame, and then continue to drive the motor to rotate forward, thereby driving the placement frame to move downward to its original position.

[0018] S4. Place the sealing cover on the top of the test chamber, and then rotate the plurality of bolts again to fix the sealing cover.

[0019] S5. Drive the motor to rotate in the reverse direction, thereby causing the sliding plug cylinder to intermittently pump air into the test chamber, thereby pressurizing the test chamber and testing the sealing performance of the battery pack body.

[0020] The present invention has the following beneficial effects:

[0021] 1. By setting the first reciprocating lead screw, the second reciprocating lead screw and the driving mechanism, when the motor rotates forward, the vertical rod rotates, so that the driving wheel drives the two driven wheels to rotate through the synchronous belt, and then drives the first reciprocating lead screw and the second reciprocating lead screw to rotate synchronously, and then drives the two sliders to slide upward, thereby removing the placement frame from the frame opening, without manual placement and fishing of the battery pack body by workers, reducing the labor intensity.

[0022] 2. By setting the backlog mechanism and the extrusion mechanism, when the motor rotates in the reverse direction, the cam rotates, so that the cam intermittently presses the vertical plate, and then drives the sliding plate to slide back and forth on the inner wall of the sliding plug cylinder. Then, under the action of the first one-way valve and the second one-way valve, the sliding plug cylinder can intermittently fill the test chamber with gas at this time, increasing the pressure in the test chamber, and then improving the sealing detection effect of the battery pack body. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a device and method for testing the sealing performance of a new energy vehicle battery pack proposed by the present invention;

[0024] Figure 2Schematic enlarged view of the structure at position A in a new energy vehicle battery pack sealing test device and method proposed by the present invention;

[0025] Figure 3 Schematic enlarged view of the structure at position B in a new energy vehicle battery pack sealing test device and method proposed by the present invention;

[0026] Figure 4 Top view structural schematic diagram of the driving mechanism in a new energy vehicle battery pack sealing test device and method proposed by the present invention.

[0027] In the figure: 1 test box, 2 first reciprocating lead screw, 3 second reciprocating lead screw, 4 slider, 5 fixed block, 6 placement frame, 7 battery pack body, 8 first spring, 9 clamping plate, 10 through port, 11 frame opening, 12 sealing cover, 13 bolt, 14 vertical rod, 15 driving wheel, 16 driven wheel, 17 support plate, 18 motor, 19 first one-way bearing, 20 sliding plug cylinder, 21 sliding plate, 22 second spring, 23 suction pipe, 24 air outlet pipe, 25 cross bar, 26 vertical plate, 27 second one-way bearing, 28 cam, 29 first one-way valve, 30 second one-way valve. Detailed implementation manners

[0028] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0029] Refer to Figures 1-4 , a new energy vehicle battery pack sealing test device, including a test box 1, an aqueous solution is provided in the test box 1, the inner walls of the test box 1 are respectively rotatably connected with a first reciprocating lead screw 2 and a second reciprocating lead screw 3, the side walls of the first reciprocating lead screw 2 and the second reciprocating lead screw 3 are respectively threadedly connected with two sliders 4, the side walls of the two sliders 4 are both slidably connected with the inner wall of the test box 1, the upper ends of the two sliders 4 are respectively fixedly connected with two fixed blocks 5, the upper ends of the two fixed blocks 5 are jointly fixedly connected with a placement frame 6, a battery pack body 7 is placed inside the inner wall of the placement frame 6, a plurality of first springs 8 are fixedly connected to both inner walls of the placement frame 6, the ends of the plurality of first springs 8 far away from the inner wall of the placement frame 6 are jointly fixedly connected with a clamping plate 9, the side wall of the clamping plate 9 is attached to the side wall of the placement frame 6, a through port 10 is opened at the bottom of the placement frame 6, a driving mechanism for synchronously rotating the first reciprocating lead screw 2 and the second reciprocating lead screw 3 is provided in the test box 1, and two support plates 17 are fixedly connected to the lower end of the test box 1, and a pressurizing mechanism for pressurizing the test box 1 is provided on one of the support plates 17.

[0030] The driving mechanism includes a vertical rod 14 that is hermetically and rotatably connected to the bottom of the test chamber 1. The upper end of the vertical rod 14 is fixedly connected to a driving wheel 15. Two driven wheels 16 are respectively fixedly connected to the side walls of the first reciprocating lead screw 2 and the second reciprocating lead screw 3. A timing belt is connected between the driving wheel 15 and the two driven wheels 16. A rotating mechanism for driving the vertical rod 14 to rotate is provided on one of the support plates 17.

[0031] The rotating mechanism includes a first one-way bearing 19. A motor 18 is fixedly connected to the side wall of one of the support plates 17 through a bracket. The side wall of the movable shaft of the motor 18 is fixedly connected to the outer side wall of the first one-way bearing 19 through a plurality of L-shaped rods. The lower end of the vertical rod 14 penetrates through the lower end of the test chamber 1, and the side wall of the vertical rod 14 below the test chamber 1 is fixedly connected to the inner side wall of the first one-way bearing 19.

[0032] The pressurizing mechanism includes a sliding plug cylinder 20 fixedly connected to the side wall of one of the support plates 17. A sliding plate 21 is hermetically and slidably connected to the inner wall of the sliding plug cylinder 20. A second spring 22 is fixedly connected to the side wall of the sliding plate 21. The end of the second spring 22 away from the sliding plate 21 is elastically connected to the inner wall of the sliding plug cylinder 20. An air suction pipe 23 is fixedly connected to the inner wall of the sliding plug cylinder 20. The inner wall of the sliding plug cylinder 20 is communicated with the inner wall of the test chamber 1 through an air outlet pipe 24. An extrusion mechanism for extruding the sliding plate 21 is provided on the motor 18.

[0033] The extrusion mechanism includes a second one-way bearing 27. The side wall of the movable shaft of the motor 18 is fixedly connected to the inner side wall of the second one-way bearing 27. A cam 28 is fixedly connected to the outer side wall of the second one-way bearing 27. A cross bar 25 is fixedly connected to the side wall of the sliding plate 21 away from the second spring 22. A vertical plate 26 is fixedly connected to the end of the cross bar 25 away from the sliding plate 21. The side wall of the vertical plate 26 is in contact with the side wall of the cam 28.

[0034] A first one-way valve 29 that only allows gas to enter the inner wall of the sliding plug cylinder 20 from the outside is installed in the air suction pipe 23. A second one-way valve 30 that only allows gas to enter the test chamber 1 from the sliding plug cylinder 20 is installed in the air outlet pipe 24.

[0035] A frame opening 11 that cooperates with the placement frame 6 is formed at the top of the test chamber 1. A sealing cover 12 that cooperates with the frame opening 11 is connected to the top of the test chamber 1 through a plurality of bolts 13.

[0036] In the present invention, a plurality of bolts 13 are rotated so that all the plurality of bolts 13 are separated from the upper end of the test box 1. Subsequently, the sealing cover 12 is removed from the upper end of the test box 1. Then, the driving motor 18 is rotated forward. At this time, the outer ring of the first one-way bearing 19 drives the rotation of its inner ring, and the inner ring of the second one-way bearing 27 does not drive the rotation of its outer ring. Thus, at this time, the vertical rod 14 is driven to rotate, so that the driving wheel 15 drives the rotation of the two driven wheels 16 through the synchronous belt, and further drives the synchronous rotation of the first reciprocating lead screw 2 and the second reciprocating lead screw 3. Further, the two sliders 4 are driven to slide upward, thereby moving the placement frame 6 out of the frame opening 11. At this time, the two sliders 4 are respectively located at the uppermost threaded portions of the first reciprocating lead screw 2 and the second reciprocating lead screw 3. Subsequently, the battery pack body 7 is placed in the placement frame 6, so that the two clamping plates 9 clamp the battery pack body 7 under the action of a plurality of first springs 8 respectively;

[0037] Subsequently, the driving motor 18 is continuously rotated forward. Thus, the first reciprocating lead screw 2 and the second reciprocating lead screw 3 rotate synchronously again, and further drive the two sliders 4 to slide downward, thereby moving the placement frame 6 down to its original position, as Figure 1 shown. At this time, the two sliders 4 are respectively located at the lowermost threaded portions of the first reciprocating lead screw 2 and the second reciprocating lead screw 3. Subsequently, the sealing cover 12 is placed on the upper end of the test box 1, and the plurality of bolts 13 are rotated again so that the plurality of bolts 13 are connected to the test box 1, and the sealing cover 12 seals the frame opening 11;

[0038] Subsequently, the driving motor 18 is rotated reversely. At this time, the outer ring of the first one-way bearing 19 does not drive the rotation of its inner ring, and the inner ring of the second one-way bearing 27 drives the rotation of its outer ring. Thus, the cam 28 is driven to rotate, so that the cam 28 intermittently presses the vertical plate 26, and further drives the slide plate 21 to slide back and forth on the inner wall of the slide plug cylinder 20. Thus, under the action of the first one-way valve 29 and the second one-way valve 30, the slide plug cylinder 20 can intermittently fill the test box 1 with gas at this time, so that the pressure in the test box 1 increases, and further improves the sealing detection effect on the battery pack body 7. After testing the battery pack body 7, the above steps of moving the placement frame 6 upward and out can be repeated.

[0039] A method for testing the sealing performance of a new energy vehicle battery pack includes the following steps;

[0040] S1. Rotate a plurality of bolts 13 to separate them from the test box 1, and then separate the sealing cover 12 from the frame opening 11;

[0041] S2. Rotate the driving motor 18 forward, and thus move the placement frame 6 upward and out of the frame opening 11;

[0042] S3. Place the battery pack body 7 to be tested in the placement frame 6. Subsequently, continue to rotate the driving motor 18 forward, and thus drive the placement frame 6 to move downward to its original position;

[0043] S4. Place the sealing cover 12 on the top of the test chamber 1, and then rotate the plurality of bolts 13 again to fix the sealing cover 12.

[0044] S5. Drive the motor 18 to rotate in the reverse direction, so that the sliding plug cylinder 20 intermittently pumps air into the test chamber 1, thereby pressurizing the inside of the test chamber 1, so as to test the sealing performance of the battery pack body 7.

[0045] In this method, the battery pack body 7 can be placed and salvaged by itself without manual placement, reducing the labor intensity. Moreover, the sealing performance detection of the battery pack body 7 is a pressure test, which can improve the test effect on the battery pack body 7.

[0046] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A sealing performance testing device for a new energy vehicle battery pack, comprising a testing chamber (1), and an aqueous solution is provided inside the testing chamber (1). Characterized in that, The inner walls of the testing chamber (1) are respectively rotatably connected with a first reciprocating lead screw (2) and a second reciprocating lead screw (3). Two sliders (4) are respectively threadedly connected to the side walls of the first reciprocating lead screw (2) and the second reciprocating lead screw (3). The side walls of the two sliders (4) are both slidably connected to the inner wall of the testing chamber (1). Two fixing blocks (5) are respectively fixedly connected to the upper ends of the two sliders (4). A placement frame (6) is fixedly connected to the upper ends of the two fixing blocks (5) together. A battery pack body (7) is placed inside the inner wall of the placement frame (6). A plurality of first springs (8) are fixedly connected to both inner walls of the placement frame (6). The ends of the plurality of first springs (8) far from the inner wall of the placement frame (6) are fixedly connected to a clamping plate (9) together. The side wall of the clamping plate (9) is attached to the side wall of the placement frame (6). A through hole (10) is opened at the bottom of the placement frame (6). A driving mechanism for driving the first reciprocating lead screw (2) and the second reciprocating lead screw (3) to rotate synchronously is provided inside the testing chamber (1). Two support plates (17) are fixedly connected to the lower end of the testing chamber (1). A pressurizing mechanism for pressurizing the testing chamber (1) is provided on one of the support plates (17).

2. A sealing performance testing device for a new energy vehicle battery pack according to claim 1, Characterized in that, The driving mechanism includes a vertical rod (14) rotatably and sealingly connected to the bottom of the testing chamber (1). A driving wheel (15) is fixedly connected to the upper end of the vertical rod (14). Two driven wheels (16) are respectively fixedly connected to the side walls of the first reciprocating lead screw (2) and the second reciprocating lead screw (3). A synchronous belt is connected between the driving wheel (15) and the two driven wheels (16). A rotating mechanism for driving the vertical rod (14) to rotate is provided on one of the support plates (17).

3. A sealing performance testing device for a new energy vehicle battery pack according to claim 2, Characterized in that, The rotating mechanism includes a first one-way bearing (19). A motor (18) is fixedly connected to the side wall of one of the support plates (17) through a bracket. The side wall of the movable shaft of the motor (18) is fixedly connected to the outer side wall of the first one-way bearing (19) through a plurality of L-shaped rods. The lower end of the vertical rod (14) penetrates through the lower end of the testing chamber (1). The side wall of the vertical rod (14) below the testing chamber (1) is fixedly connected to the inner side wall of the first one-way bearing (19).

4. A sealing performance testing device for a new energy vehicle battery pack according to claim 3, Characterized in that, The pressurizing mechanism includes a sliding plug cylinder (20) fixedly connected to the side wall of one of the support plates (17). A sliding plate (21) is hermetically and slidably connected to the inner wall of the sliding plug cylinder (20). A second spring (22) is fixedly connected to the side wall of the sliding plate (21). One end of the second spring (22) away from the sliding plate (21) is elastically connected to the inner wall of the sliding plug cylinder (20). An air suction pipe (23) is fixedly connected to the inner wall of the sliding plug cylinder (20). The inner wall of the sliding plug cylinder (20) is communicated with the inner wall of the test chamber (1) through an air outlet pipe (24). An extrusion mechanism for extruding the sliding plate (21) is provided on the motor (18).

5. The sealing performance testing device for a new energy vehicle battery pack according to claim 4, characterized in that, the extrusion mechanism includes a second one-way bearing (27). The side wall of the movable shaft of the motor (18) is fixedly connected to the inner side wall of the second one-way bearing (27). The outer side wall of the second one-way bearing (27) is fixedly connected to a cam (28). A cross bar (25) is fixedly connected to the side wall of the sliding plate (21) away from the second spring (22). One end of the cross bar (25) away from the sliding plate (21) is fixedly connected to a vertical plate (26). The side wall of the vertical plate (26) is in contact with the side wall of the cam (28).

6. The sealing performance testing device for a new energy vehicle battery pack according to claim 5, characterized in that, a first one-way valve (29) that only allows gas to enter the inner wall of the sliding plug cylinder (20) from the outside is installed in the air suction pipe (23). A second one-way valve (30) that only allows gas to enter the test chamber (1) from the sliding plug cylinder (20) is installed in the air outlet pipe (24).

7. The sealing performance testing device for a new energy vehicle battery pack according to claim 6, characterized in that, a frame opening (11) matching the placement frame (6) is formed at the top of the test chamber (1). The top of the test chamber (1) is connected with a sealing cover (12) matching the frame opening (11) through a plurality of bolts (13).

8. The testing method of the sealing performance testing device for a new energy vehicle battery pack according to claim 7, characterized in that, it includes the following steps; S1. Rotate a plurality of bolts (13) to separate them from the test chamber (1), and then separate the sealing cover (12) from the frame opening (11); S2. Drive the motor (18) to rotate forward, and then move the placement frame (6) upward and move it out of the frame opening (11); S3. Place the battery pack body (7) to be tested in the placement frame (6), and then continue to drive the motor (18) to rotate forward, and then drive the placement frame (6) to move downward to its original position; S4. Place the sealing cover (12) on the top of the test chamber (1), and then rotate a plurality of bolts (13) again to fix the sealing cover (12); S5. Drive the motor (18) to rotate in the reverse direction, and then the sliding plug cylinder (20) intermittently pumps air into the test chamber (1), and then pressurizes the inside of the test chamber (1), so as to test the sealing performance of the battery pack body (7).

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