Inner leakage measuring device for cooling pipe of automobile battery pack

Abstract

The invention discloses a device for measuring inner leakage of a cooling pipe of an automobile battery pack. Comprising a detection table, a sealing chuck, a rear bearing seat, a front bearing seat and the like. A gas tank is arranged on the first bracket on the right side of the bottom of the detection table and is communicated with the right side sealing chuck through a gas pipe. A T-shaped frame is installed at the inner end of the cross arm, a sliding plate is inserted into a front clamping ring of the T-shaped frame to be connected with an assembly plate, a two-way screw is arranged between side plates at the bottom of an installation plate at the bottom end of the assembly plate, a second motor drives the two-way screw to rotate through a main gear and an auxiliary gear to enable a detection chuck at the bottom of a moving block to clamp a cooling pipe, and the detection chuck is provided with a detection probe. And the internal structures of the rear bearing seat and the front bearing seat are matched with components such as sliding blocks. The first motor drives the transmission rod to make the assembling plate and the mounting plate reciprocate left and right to drive the cooling pipe to shake. The device can comprehensively cover and detect the internal leakage of the cooling pipe, improves the accuracy, can detect tiny leakage, also can simulate actual working condition shake detection, and improves the practicability.

Description

Technical Field

[0001] The present invention relates to the application field of cooling pipe internal leakage detection devices, and more particularly to an internal leakage detection device for an automotive battery pack cooling pipe. Background Art

[0002] New energy vehicle batteries need to be cooled, and water cooling is the current mainstream cooling solution. The battery pack needs to use cooling corrugated pipes for cooling. During the production of some cooling corrugated pipes, high-frequency welding is required between the plate body and the end. High-frequency welding has the advantages of high production efficiency and good product consistency, but the welding effect cannot be visually inspected. Existing detection methods include internal leakage detection, water detection, dry detection, helium detection, etc. Among them, internal leakage detection is a special inspection item, and its purpose is to check the shunt effect of cooling pipes with an internal shunt blocking design.

[0003] Common internal leakage detection devices for automotive battery pack cooling pipes cannot fully cover the cooling pipes, resulting in some areas being omitted and prone to missed detection. In addition, their detection ability for minute leaks is insufficient. Since traditional detection devices cannot form an effective sealed environment to capture the airflow changes caused by minute gas leaks, some minute leaks are difficult to detect, reducing the accuracy of internal leakage detection for cooling pipes. Also, since traditional detection devices detect the cooling pipes after they are fixed, they cannot simulate the complex stress environment during actual use, resulting in poor comprehensiveness of the test data of the internal leakage detection device and failing to meet the working requirements of the application of the cooling pipe internal leakage detection device. For this reason, an internal leakage detection device for an automotive battery pack cooling pipe is proposed. Summary of the Invention

[0004] The present invention provides the following technical solution: An internal leakage detection device for an automotive battery pack cooling pipe, comprising: A detection table, on the top of which sealing chucks are installed on both the left and right sides, a rear support seat is installed at the rear of the top of the detection table, and a front support seat is installed at the front of the top of the detection table; A connecting plate, installed on the tops of the rear support seat and the front support seat. Horizontal arms are connected to the upper parts inside the connecting plate. A first support is connected to the right side of the bottom of the detection table, and an air tank is installed on the top of the first support; A T-shaped frame, installed at the inner end of the horizontal arm. Clamping rings are installed on both the left and right sides of the front part of the T-shaped frame, and sliding plates are inserted into the inside of the clamping rings. An assembly plate is connected to the bottom of the sliding plate; A mounting plate, welded to the bottom end of the assembly plate. Side plates are connected to both the left and right sides of the bottom of the mounting plate. A bidirectional screw is installed inside the side plates through ball bearings, and moving blocks are screwed on both sides of the outside of the bidirectional screw; The second bracket is connected to the rear of the T-shaped bracket. A first motor is installed inside the second bracket, and the outer end of the rotor of the first motor is coaxially connected to a transmission rod. Pillars are connected to the bottom of the moving block, and detection chucks are installed at the bottom ends of the pillars. A detection probe is inserted into the detection chuck. A second motor is installed on the left side of the top of the mounting plate. The outer end of the rotor of the second motor is coaxially connected to a main gear, and a sub-gear is coaxially installed at the left end of the bidirectional screw.

[0005] Preferably, the air outlet of the air tank is connected to an air delivery pipe, and the air outlet of the air delivery pipe is communicated with the inside of the right sealing chuck. Threaded holes are installed inside the sealing chucks.

[0006] Preferably, the interiors of the rear support seat and the front support seat are both hollow structures, and sliders are inserted into the interiors of the rear support seat and the front support seat.

[0007] Preferably, the right side of the inner cavity of the rear support seat is connected to a lead screw through a ball bearing, and the lead screw passes through the inside of the slider inside the rear support seat and is screwed to it. The left end of the lead screw passes through the corresponding position of the rear support seat, and a third motor is coaxially installed at the left end of the lead screw.

[0008] Preferably, a guide rod is inserted into the middle of the inner cavity of the front support seat. The guide rod passes through the inside of the slider inside the front support seat. The shapes of the sliders and the inner cavities of the rear support seat and the front support seat are all trapezoidal.

[0009] Preferably, the main gear meshes with the sub-gear. The threads on both sides of the bidirectional screw are arranged in opposite directions, and a partition is installed in the middle of the bidirectional screw.

[0010] Preferably, semi-circular grooves are formed inside the detection chucks. Cavities are formed inside the detection chucks at positions outside the detection probe. The number of detection probes is 2 - 4 groups.

[0011] Preferably, a through groove is formed at the middle position inside the assembly plate. A clamping block is installed on the lower side of the front side of the transmission rod through a bearing. The clamping block is inserted into the through groove.

[0012] Preferably, connecting pins are installed on the tops of the sliding plate and the right clamping ring. Springs are sleeved outside the connecting pins.

[0013] Preferably, chutes are formed on the left and right sides of the bottom of the mounting plate. Limit blocks are inserted into the chutes. The bottom ends of the limit blocks are connected to the tops of the moving blocks.

[0014] In summary, compared with the prior art, the present invention provides an inner leak detection device for an automotive battery pack cooling pipe, which has the following beneficial effects: 1. The present invention drives the rotation of the main gear through the second motor, and can drive the rotation of the bidirectional screw through the driven gear, thereby driving the closing of the moving block and the support column at the same time, so that the detection chuck can be clamped outside the cooling pipe. At the same time, the air tank can be used to ventilate the inside of the cooling pipe, so that when leakage occurs during the detection process, the gas is captured by the detection probe, and then the internal leakage state of the cooling pipe is detected. Since the detection chuck presses on the outside of the cooling pipe, it can ensure the comprehensive coverage detection of the cooling pipe, reduce the undetected area, improve the detection accuracy, and when the gas leaks inside the cooling pipe, the gas flow will be captured by the probe. Since the detection chuck is closely attached to the cooling pipe to form a sealed state, even the airflow change caused by a tiny gas leak can be effectively detected, thus improving the detection ability for tiny leaks; 2. The present invention drives the rotation of the transmission rod through the first motor, thereby driving the reciprocating left and right movement of the assembly plate and the mounting plate, so that when the detection chuck is clamped outside the cooling pipe for detection, the cooling pipe can be driven to shake reciprocally left and right, and then it can better simulate various stress conditions of the cooling pipe during actual use, enabling the cooling pipe to be detected under a more realistic usage environment, making potential leakage problems more likely to be exposed, ensuring a high degree of correlation between the detection results and the actual usage situation, and for the cooling pipe of a flexible hose, this kind of shaking detection can better detect its strength and tensile resistance, improving the practicality of the internal leakage detection device for the cooling pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention.

[0016] Figure 2 is a schematic structural diagram of the first support and the air tank of the present invention.

[0017] Figure 3 is a schematic cross-sectional structural diagram of the rear support seat of the present invention.

[0018] Figure 4 is a schematic structural diagram of the T-shaped frame and the mounting plate of the present invention.

[0019] Figure 5 is a schematic structural diagram of the T-shaped frame and the second support of the present invention.

[0020] Figure 6 is a schematic structural diagram of the transmission rod and the block of the present invention.

[0021] Figure 7 is a schematic structural diagram of the mounting plate of the present invention.

[0022] Figure 8 is a schematic cross-sectional structural diagram of the front support seat of the present invention.

[0023] Figure 9 is a schematic bottom view structural diagram of the mounting plate of the present invention.

[0024] Description of reference numerals: 1. Inspection table; 2. Sealing chuck; 3. Rear support seat; 4. Front support seat; 5. Connecting plate; 6. Cross arm; 7. First bracket; 8. Gas tank; 9. Gas pipe; 10. Lead screw; 11. Slider; 12. T-shaped frame; 13. Snap ring; 14. Slide plate; 15. Assembly plate; 16. Second bracket; 17. First motor; 18. Transmission rod; 19. Block; 20. Through groove; 21. Mounting plate; 22. Side plate; 23. Bidirectional screw; 24. Moving block; 25. Second motor; 26. Main gear; 27. Sub gear; 28. Pillar; 29. Inspection chuck; 30. Cavity; 31. Inspection probe; 32. Guide rod; 33. Slide groove; 34. Limit block; 35. Connecting pin; 36. Spring; 37. Third motor. DETAILED DESCRIPTION

[0025] 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.

[0026] The present invention provides a technical solution, a device for detecting internal leakage of a cooling pipe of an automobile battery pack, comprising a detection platform 1, a sealing chuck 2, a rear support seat 3, a front support seat 4, a connecting plate 5, a cross arm 6, a first bracket 7, a gas tank 8, a gas delivery pipe 9, a lead screw 10, a slider 11, a T-shaped frame 12, a snap ring 13, a slide plate 14, an assembly plate 15, a second bracket 16, a first motor 17, a transmission rod 18, a block 19, a through groove 20, a mounting plate 21, a side plate 22, a bidirectional screw 23, a moving block 24, a second motor 25, a main gear 26, a sub-gear 27, a pillar 28, a detection chuck 29, a cavity 30, a detection probe 31, a guide rod 32, a slide groove 33, a limit block 34, a connecting pin 35, a spring 36 and a third motor 37: See also Figure 1 , a testing platform 1, sealing chucks 2 are installed on both left and right sides of the top of the testing platform 1, a rear support seat 3 is installed on the rear side of the top of the testing platform 1, and a front support seat 4 is installed on the front side of the top of the testing platform 1; The connecting plate 5 is mounted on the top of the rear supporting seat 3 and the front supporting seat 4. The inner upper part of the connecting plate 5 is connected to a cross arm 6. Figure 2 The bottom right side of the test bench 1 is connected to a first bracket 7, and a gas tank 8 is installed on the top of the first bracket 7. The gas outlet of the gas tank 8 is connected to a gas pipe 9. The gas outlet of the gas pipe 9 is connected to the inside of the right sealing chuck 2. The inner side of the sealing chuck 2 is equipped with screw holes. Please refer to Figure 3, both the inner parts of the rear support seat 3 and the front support seat 4 are hollow structures. Sliders 11 are inserted into the inner parts of the rear support seat 3 and the front support seat 4. The right side of the inner cavity of the rear support seat 3 is connected with a lead screw 10 through a ball bearing, and the lead screw 10 passes through the inner part of the slider 11 inside the rear support seat 3 and is rotationally connected with it. The left end of the lead screw 10 passes through the corresponding position of the rear support seat 3. Please refer to Figure 1 , a third motor 37 is coaxially installed at the left end of the lead screw 10. Please refer to Figure 8 , a guide rod 32 is inserted into the middle part of the inner cavity of the front support seat 4. The guide rod 32 passes through the inner part of the slider 11 inside the front support seat 4. The shapes of the sliders 11 and the inner cavities of the rear support seat 3 and the front support seat 4 are all trapezoidal. By driving the rotation of the lead screw 10 through the third motor 37, the left - right movement of the slider 11 and the connecting plate 5 can be driven, so that the detection chuck 29 can be driven to adjust the left - right position during detection, facilitating the detection of different positions of the cooling pipe and improving the adaptability of the detection device; Please refer to Figure 4 and Figure 5 , a T - shaped frame 12 is installed at the inner end of the cross arm 6. Clamping rings 13 are installed on the left and right sides of the front part of the T - shaped frame 12, and sliding plates 14 are inserted into the clamping rings 13. An assembly plate 15 is connected to the bottom of the sliding plate 14; , a mounting plate 21 is welded to the bottom end of the assembly plate 15. Side plates 22 are connected to the left and right sides of the bottom of the mounting plate 21. A bidirectional screw 23 is installed on the inner side of the side plates 22 through a ball bearing. Moving blocks 24 are rotationally connected to both outer sides of the bidirectional screw 23; , a second bracket 16 is connected to the rear part of the T - shaped frame 12. A first motor 17 is installed inside the second bracket 16. Please refer to Figure 6 , the outer end of the rotor of the first motor 17 is coaxially connected with a transmission rod 18. A through - slot 20 is opened at the middle position inside the assembly plate 15. A clamping block 19 is installed on the lower side of the front side of the transmission rod 18 through a bearing. The clamping block 19 is inserted into the through - slot 20. Please refer to Figure 7 , support columns 28 are connected to the bottoms of the moving blocks 24. Detection chucks 29 are installed at the bottom ends of the support columns 28. Detection probes 31 are inserted into the detection chucks 29. Semi - circular grooves are opened on the inner sides of the detection chucks 29. Cavities 30 are opened at the positions outside the detection probes 31 inside the detection chucks 29. The number of the detection probes 31 is 2 - 4 groups; , a second motor 25 is installed on the left side of the top of the mounting plate 21. The outer end of the rotor of the second motor 25 is coaxially connected with a main gear 26. A sub - gear 27 is coaxially installed at the left end of the bidirectional screw 23. The main gear 26 meshes with the sub - gear 27. The threads on both sides of the bidirectional screw 23 are set in opposite directions. A partition plate is installed in the middle of the bidirectional screw 23. Please refer to Figure 5, connecting pins 35 are installed on the tops of the skateboard 14 and the right clamping ring 13, and springs 36 are sleeved outside the connecting pins 35. Please refer to Figure 9 , chute grooves 33 are opened on the left and right sides of the bottom of the mounting plate 21, limiting blocks 34 are inserted inside the chute grooves 33, and the bottom ends of the limiting blocks 34 are connected to the tops of the moving blocks 24.

[0027] The detailed real-time process of this solution is as follows: Device inspection and preparation: First, check whether the test bench 1 is stable and whether there is any damage or deformation on the tabletop. Check the status of the sealing chuck 2, including whether its screw holes are clean and unblocked, whether its opening and closing functions are normal, and whether its sealing performance is good. Check the hollow structures inside the rear support seat 3 and the front support seat 4 to ensure that there is no foreign object blockage. Check the sliding condition of the slider 11 therein, and it should be able to slide smoothly without jamming. For the lead screw 10 in the rear support seat 3, check whether its connection with the ball bearing is tight and whether it rotates flexibly. At the same time, confirm that the coaxial connection between the third motor 37 and the lead screw 10 is firm, the wiring of the motor is normal, and it can be started and operated normally. Check the guide rod 32 inside the front support seat 4, the surface should be smooth without bending deformation to ensure that the slider 11 slides stably along it. Check the pressure gauge of the air tank 8 to ensure that the gas pressure in the air tank 8 is within the appropriate range. Check whether the air delivery pipe 9 is connected firmly without damage or air leakage. Check the valve of the air tank 8 to ensure that its opening and closing functions are normal. Check whether the connection between the T-shaped frame 12 and the cross arm 6 is stable and whether the skateboard 14 inside the clamping ring 13 slides smoothly. Check whether the spring 36 on the connecting pin 35 has sufficient elasticity without damage or deformation. Check the connection of the bidirectional screw 23 with the ball bearing of the side plate 22, and the bidirectional screw 23 should be able to rotate freely. Confirm the meshing state of the main gear 26 and the sub-gear 27, the tooth surface should be clean, meshed tightly without excessive clearance. Check the screwing connection of the moving block 24 on the bidirectional screw 23, and the limiting block 34 should slide smoothly in the chute groove 33 without jamming. Check whether the connection between the first motor 17 and the transmission rod 18 is firm, and the transmission rod 18 should rotate flexibly. Check the fitting accuracy of the clamping block 19 in the through groove 20 to ensure that the clamping block 19 can slide smoothly in the through groove 20. Check the detection probe 31 inside the detection chuck 29 to ensure that its connection is normal without damage and it can accurately detect the gas flow. The surface of the semi-circular groove of the detection chuck 29 should be smooth and the dimensional accuracy meets the requirements; Cooling pipe placement: Place the automotive battery pack cooling pipe at the position of the sealing chuck 2 for fixation to ensure that the cooling pipe is placed stably; The detection chuck clamps the cooling pipe: Start the second motor 25, and the rotation of the rotor of the second motor 25 drives the main gear 26 to rotate. Since the main gear 26 meshes with the sub-gear 27, the sub-gear 27 rotates as the main gear 26 rotates, thereby driving the bidirectional screw 23 to rotate. The threads on both sides of the bidirectional screw 23 are arranged in opposite directions. When the bidirectional screw 23 rotates, the moving blocks 24 screwed on the outer sides of both sides thereof will move towards each other along the bidirectional screw 23. During the process of moving towards each other, the support columns 28 connected to the bottom of the moving block 24 will drive the detection chuck 29 to move towards the cooling pipe. The limiting block 34 slides in the sliding groove 33 to provide guiding and limiting functions for the movement of the moving block 24, ensuring that the detection chuck 29 accurately moves towards the cooling pipe. As the detection chuck 29 continues to move, the semi-circular groove inside the detection chuck 29 gradually approaches the outer wall of the cooling pipe. When the detection chuck 29 contacts the cooling pipe, due to the continuous rotation of the bidirectional screw 23, the detection chuck 29 will continue to clamp the cooling pipe under the drive of the bidirectional screw 23 until the detection chuck 29 tightly presses against the outside of the cooling pipe. At this time, a good sealing environment is formed between the detection chuck 29 and the cooling pipe, and the semi-circular groove of the detection chuck 29 can adapt to cooling pipes of different diameters to ensure full coverage of the outer circumference of the cooling pipe; Air vent detection of the cooling pipe: Use the sealing chuck 2 on the right side of the top of the detection table 1 to seal one end of the cooling pipe. Operate the clamping device on the sealing chuck 2 to tightly clamp the port of the cooling pipe to prevent gas leakage. Then open the valve of the gas tank 8, and the gas in the gas tank 8 enters the inside of the cooling pipe through the gas transmission pipe 9. As the gas continuously fills the inside of the cooling pipe, if there is an internal leakage in the cooling pipe, the internal gas will leak out from the leakage point. Since the detection chuck 29 is closely attached to the cooling pipe to form a sealed state, the leaked gas will cause an air flow change in the cavity 30 inside the detection chuck 29. The 2-4 groups of detection probes 31 inserted inside the detection chuck 29 can sensitively capture this air flow change, thereby completing the detection; Simulated actual working condition sway detection: While the detection chuck 29 clamps the cooling pipe and conducts air ventilation detection, the first motor 17 is started. The rotation of the rotor of the first motor 17 drives the transmission rod 18 to rotate. The clamping block 19 installed on the front lower side of the transmission rod 18 through a bearing is inserted into the through groove 20 of the assembly plate 15. As the transmission rod 18 rotates, the clamping block 19 makes a reciprocating motion in the through groove 20, and the reciprocating motion of the clamping block 19 in the through groove 20 drives the assembly plate 15 and the mounting plate 21 welded thereto to make a reciprocating left and right motion. Since the detection chuck 29 clamps the cooling pipe, the reciprocating left and right motion of the mounting plate 21 will drive the cooling pipe to sway left and right reciprocally. This kind of sway simulates various force conditions that the cooling pipe is subjected to during the actual driving of the vehicle, such as the forces generated by vehicle acceleration, deceleration, turning, etc. For the flexible cooling pipe, this kind of sway can also detect its strength and tensile resistance. During the swaying process of the cooling pipe, the detection probe 31 continues to detect the cooling pipe. If new leakage points appear on the cooling pipe due to additional forces during the swaying process or the leakage situation of the original leakage points worsens, the detection probe 31 can also capture the corresponding airflow changes, so as to more comprehensively and accurately detect the internal leakage situation of the cooling pipe; In this solution, the detection chuck 29 is tightly pressed against the outside of the cooling pipe. Thanks to the design of its semi-circular groove and the precise drive of the bidirectional screw 23, it can achieve a comprehensive coverage detection of the cooling pipe. Regardless of the shape of the cooling pipe, whether it is straight or has a certain degree of curvature, the detection chuck 29 can fit well on its surface. Compared with traditional detection methods, this greatly reduces the undetected area, thereby improving the detection accuracy. And the detection chuck 29 is in a tightly fitting and sealed state with the cooling pipe. When there is a tiny gas leak inside the cooling pipe, the weak airflow change generated by the leak will gather and amplify in the cavity 30 inside the detection chuck 29. The number of detection probes 31 is 2 - 4 groups, which can sensitively capture this amplified airflow change. This enables the device to detect very tiny leaks, timely discover potential early leaks in the cooling pipe, and avoid a series of problems such as battery overheating and performance degradation caused by cooling pipe leaks during the use of the automotive battery pack. At the same time, by driving the cooling pipe to reciprocate left and right by the first motor 17, it can accurately simulate the force condition of the cooling pipe during actual use of the vehicle. During vehicle driving, the cooling pipe will be affected by forces from different directions. This simulated shaking detection enables the cooling pipe to be tested under a more realistic usage environment. In this way, potential leak problems of the cooling pipe are more likely to be exposed, and the detection results have a high correlation with the actual usage situation of the cooling pipe, thereby improving the detection reliability and reducing misjudgment situations caused by a large difference between the detection environment and the actual working conditions. For the hose cooling pipe used in the automotive battery pack, this shaking detection has additional significance. The hose not only has to bear the pressure of the internal gas or liquid during actual use but also the tensile force, torsion force, etc. during vehicle driving. Through the simulated shaking detection, the strength and tensile resistance of the hose can be detected to ensure that the hose will not rupture or leak due to stress during actual use. This helps to improve the safety and reliability of the hose cooling pipe in the cooling system of the automotive battery pack and extend its service life.

[0028] And the operation is relatively simple and convenient. By starting several key components such as the second motor 25, the first motor 17, and the air tank 8, a series of detection operations such as clamping of the detection chuck, air ventilation detection of the cooling pipe, and shaking simulation of the cooling pipe can be completed. The connection between each operation step is smooth and does not require complex manual intervention. For example, the design of the reverse threads on both sides of the bidirectional screw 23 enables the detection chuck 29 to be simultaneously clamped or loosened on the cooling pipe through the drive of the second motor 25, with high-efficiency and quick operation. This simple and efficient operation method not only improves the detection efficiency but also reduces the technical requirements for operators, which is conducive to large-scale popularization and application on the production line.

[0029] In this solution, the rotation of the main gear 26 is driven by the second motor 25, and the rotation of the bidirectional screw 23 can be driven by the secondary gear 27, so that the closing of the moving block 24 and the support column 28 can be driven simultaneously, enabling the detection chuck 29 to be clamped outside the cooling pipe. At the same time, air can be introduced into the cooling pipe through the air tank 8, so that when leakage occurs during the detection process, the gas is captured by the detection probe 31, thereby completing the detection of the internal leakage state of the cooling pipe. Since the detection chuck 29 is pressed on the outside of the cooling pipe, it can ensure the comprehensive coverage detection of the cooling pipe, reduce the undetected area, and improve the accuracy of the detection. Moreover, when the gas leaks inside the cooling pipe, the gas flow will be captured by the detection probe 31. Since the detection chuck 29 is closely attached to the cooling pipe to form a sealed state, even the airflow change caused by a tiny gas leak can be effectively detected, thus improving the detection ability for tiny leaks.

[0030] In this solution, the rotation of the drive rod 18 is driven by the first motor 17, so that the left-right reciprocating movement of the assembly plate 15 and the mounting plate 21 can be driven. When the detection chuck 29 is clamped outside the cooling pipe for detection, the cooling pipe can be driven to swing left and right reciprocally, thereby being able to better simulate various stress conditions of the cooling pipe during actual use, enabling the cooling pipe to be detected under a more realistic usage environment, making potential leakage problems more likely to be exposed, ensuring a high correlation between the detection result and the actual usage situation, and for the cooling pipe of a flexible hose, this kind of swinging detection can better detect its strength and tensile resistance, enhancing the practicality of the internal leakage detection device for the cooling pipe.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An internal leakage detection device for an automotive battery pack cooling pipe, characterized in that, Including: A detection table (1), with sealing chucks (2) installed on both the left and right sides of the top of the detection table (1), a rear support base (3) installed at the rear side of the top of the detection table (1), and a front support base (4) installed at the front side of the top of the detection table (1); A connecting plate (5) installed on the tops of the rear support base (3) and the front support base (4). Horizontal arms (6) are connected to the upper inner sides of the connecting plate (5). A first bracket (7) is connected to the right side of the bottom of the detection table (1), and an air tank (8) is installed on the top of the first bracket (7); A T-shaped frame (12) installed at the inner end of the horizontal arm (6). Clamping rings (13) are installed on both the left and right sides of the front part of the T-shaped frame (12), and sliding plates (14) are inserted into the interiors of the clamping rings (13). An assembly plate (15) is connected to the bottom of the sliding plate (14); A mounting plate (21) welded to the bottom end of the assembly plate (15). Side plates (22) are connected to both the left and right sides of the bottom of the mounting plate (21). A bidirectional screw (23) is installed inside the side plates (22) through ball bearings. Moving blocks (24) are screwed onto both outer sides of the bidirectional screw (23); A second bracket (16) connected to the rear part of the T-shaped frame (12). A first motor (17) is installed inside the second bracket (16), and a transmission rod (18) is coaxially connected to the outer end of the rotor of the first motor (17). Support columns (28) are connected to the bottoms of the moving blocks (24), and detection chucks (29) are installed at the bottom ends of the support columns (28). Detection probes (31) are inserted into the interiors of the detection chucks (29); A second motor (25) installed on the left side of the top of the mounting plate (21). A main gear (26) is coaxially connected to the outer end of the rotor of the second motor (25). A sub-gear (27) is coaxially installed at the left end of the bidirectional screw (23).

2. The internal leakage detection device for the cooling pipe of an automotive battery pack according to claim 1, wherein: The air outlet of the air tank (8) is connected to an air pipe (9), and the air outlet of the air pipe (9) is communicated with the interior of the right sealing chuck (2). Threaded holes are installed on the inner sides of the sealing chucks (2).

3. The internal leakage detection device for the cooling pipe of an automotive battery pack according to claim 1, characterized in that: The interiors of both the rear support base (3) and the front support base (4) are hollow structures, and sliding blocks (11) are inserted into the interiors of both the rear support base (3) and the front support base (4).

4. An internal leakage detection device for an automotive battery pack cooling pipe according to claim 3, characterized in that: The right side of the inner cavity of the rear support base (3) is connected to a lead screw (10) through a ball bearing, and the lead screw (10) passes through the interior of the sliding block (11) inside the rear support base (3) and is screwed to it. The left end of the lead screw (10) passes through the corresponding position of the rear support base (3), and a third motor (37) is coaxially installed at the left end of the lead screw (10).

5. The internal leakage detection device for the cooling pipe of an automotive battery pack according to claim 4, wherein: A guide rod (32) is inserted into the middle of the inner cavity of the front support base (4). The guide rod (32) passes through the interior of the sliding block (11) inside the front support base (4). The inner cavity shapes of the sliding blocks (11), the rear support base (3), and the front support base (4) are all trapezoidal.

6. The internal leakage detection device for the cooling pipe of an automotive battery pack according to claim 1, wherein: The main gear (26) meshes with the auxiliary gear (27). The threads on both sides of the bidirectional screw (23) are arranged in opposite directions, and a partition is installed in the middle of the bidirectional screw (23).

7. An internal leakage detection device for an automotive battery pack cooling pipe according to claim 1, characterized in that: Semicircular grooves are formed on the inner sides of the detection chucks (29). Cavities (30) are formed inside the detection chucks (29) at positions outside the detection probes (31). The number of the detection probes (31) is 2 - 4 groups.

8. The internal leakage detection device for the cooling pipe of an automotive battery pack according to claim 1, wherein: A through groove (20) is formed in the middle position inside the assembly plate (15). A chuck (19) is installed on the lower side of the front side of the transmission rod (18) through a bearing, and the chuck (19) is inserted into the through groove (20).

9. The internal leakage detection device for an automotive battery pack cooling pipe according to claim 1, characterized in that: Connecting pins (35) are installed on the tops of the sliding plate (14) and the right - hand side clamping ring (13). Springs (36) are sleeved outside the connecting pins (35).

10. The internal leakage detection device for an automotive battery pack cooling pipe according to claim 1, characterized in that: Chute grooves (33) are formed on the left and right sides of the bottom of the mounting plate (21). Limiting blocks (34) are inserted into the chute grooves (33), and the bottom ends of the limiting blocks (34) are connected to the tops of the moving blocks (24).

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