An automatic battery pack airtightness testing device

Abstract

This invention relates to the field of battery pack testing technology and discloses an automatic battery pack airtightness testing device. The device includes a clamping and positioning assembly mounted on a feeding unit and a testing unit located on one side of the feeding unit. The testing unit includes a measuring component, an adjusting component, a driving component, a control terminal, and an airtightness tester. The control terminal is connected to the clamping and positioning assembly, the measuring component, the adjusting component, the driving component, and the airtightness tester. The control terminal calculates the adjustment parameters between the initial position and the target position of the testing connector based on preset adjustment rules, and controls the adjusting component to adjust the initial position of the testing connector to the target position according to the adjustment parameters. This invention adaptively calibrates the target position of the testing connector based on the current position of the charging / discharging connector of the battery pack under test, thereby ensuring accurate connector alignment, significantly improving the service life of the connector and the speed and accuracy of the sealing test of the battery pack under test, shortening the testing cycle of a single sample, and reducing the false positive rate.

Description

Technical Field

[0001] This invention relates to the field of battery pack testing technology, specifically to an automatic testing device for the airtightness of a battery pack. Background Technology

[0002] With the development of new energy technologies, especially the rapid growth of the electric vehicle and energy storage markets, higher requirements have been placed on the safety and reliability of battery packs. Among these, the battery pack casing, as a crucial component, directly affects the protection capabilities of the internal electronic components and the overall lifespan of the battery pack. Currently, there are two methods for testing the airtightness of battery pack casings on the market: one relies on manual inspection, which is not only inefficient but also difficult to guarantee accuracy. For example, non-standard docking procedures can easily shorten the lifespan of the connectors. The other method is automatic detection. While automatic detection is highly efficient, its air inlet and outlet positions are fixed. This means that for some battery packs with misaligned air inlets, misalignment during docking can easily occur, leading to connector damage, production line downtime, and other unnecessary losses. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an automatic battery pack airtightness testing device to solve the technical problems mentioned in the prior art.

[0004] An automatic battery pack airtightness testing device, the device comprising a clamping and positioning assembly disposed on a feeding unit, and a testing unit located on one side of the feeding unit, the testing unit comprising:

[0005] The measuring component is used to obtain the current position of the charging / discharging connector of the battery pack under test after the feeding unit transports the battery pack to the preset station and clamps and fixes it by the clamping and positioning component, and then uploads it to the control terminal.

[0006] An adjustment component is located near the charging / discharging connector of the battery pack under test. A detection connector is installed at the output end of the adjustment component. The control terminal calculates the adjustment parameters between the initial position and the target position of the detection connector based on a preset adjustment rule, and controls the adjustment component to adjust the initial position of the detection connector to the target position according to the adjustment parameters. The preset adjustment rule is: the target position of the detection connector is referenced to the current position of the charging / discharging connector of the battery pack under test, and the detection connector moves to the target position according to a preset motion trajectory and then engages with the charging / discharging connector of the battery pack under test.

[0007] A drive unit, the output end of which is equipped with the adjustment component, so that when the adjustment component adjusts the initial position of the detection connector to the target position, the control terminal controls the adjustment component to move according to a preset motion trajectory, so that the detection connector engages with the charging / discharging connector of the battery pack under test;

[0008] An airtightness tester has its inlet and outlet connected to the test connector via pipes. When the test connector mates with the charge / discharge connector of the battery pack under test, it performs airtightness testing on the battery pack. The tester simulates different operating conditions by controlling the air intake according to preset control rules. The preset control rules are as follows:

[0009] The airtightness testing environment under different operating conditions is loaded according to the testing requirements of the battery pack under test.

[0010] Optionally, the device may also include a control box and a display;

[0011] The control terminal is placed inside the control box, and a base is provided on the top of the control box. The measuring component, the adjusting component, and the driving component are respectively mounted on the base.

[0012] The display is mounted on the base. The display has a display interface and several operation buttons. The operation buttons are respectively connected to the control terminal and the airtightness detector, and are used to control the start and stop of the control terminal and the airtightness detector.

[0013] The display interface is connected to the airtightness tester and is used to display the test results of the airtightness tester.

[0014] Optionally, the adjusting member includes:

[0015] A horizontal moving unit is installed at the output end of the drive unit, and the detection connector is installed at the output end of the horizontal moving unit;

[0016] A vertical moving unit is mounted on the base. The output end of the vertical moving unit passes through the base and extends to a lifting platform above the base. The driving component is mounted on the lifting platform.

[0017] Optionally, the horizontal movement unit includes:

[0018] A guide rail is installed at the output end of the drive component;

[0019] A first telescopic component is installed on the guide rail, and the output direction of the first telescopic component is parallel to the conveying direction of the feeding unit. The detection connector is installed at the output end of the first telescopic component.

[0020] Optionally, the first telescopic member includes:

[0021] The first drive motor is mounted on the guide rail;

[0022] The first lead screw is installed at the output end of the first drive motor;

[0023] A lead screw seat is sleeved on the outer periphery of the lead screw to fix the detection connector.

[0024] The slider is slidably mounted on the outer periphery of the guide rail and connected to the lead screw seat.

[0025] Optionally, the vertical movement unit includes:

[0026] The second telescopic component is installed at the bottom of the base, and the output end of the second telescopic component passes through the top of the base and is connected to the lifting platform.

[0027] Several guide columns are provided, with one end of each guide column connected to the bottom of the lifting platform and the other end passing through the base. When the second telescopic member outputs its maximum stroke, the guide column and the base are in a cooperative relationship.

[0028] Optionally, the second telescopic member includes:

[0029] The second drive motor is installed at the bottom of the base;

[0030] The second lead screw has one end installed at the output end of the second drive motor, and the other end passes through the base and the lifting platform in sequence. The second lead screw is rotatably connected to the base and threadedly connected to the lifting platform.

[0031] Optionally, the measuring element is a charge-coupled device (CCD), which is mounted on the lifting platform via a bracket.

[0032] Optionally, the driving component is a cylinder, a hydraulic cylinder, or an electric push rod;

[0033] Preferably, the driving component is a cylinder, and the cylinder is equipped with a high-pressure air supply unit.

[0034] Optionally, the detection connector has a first connector and a second connector;

[0035] The first connector is connected to the air outlet of the air tightness tester and is matched with the air inlet of the battery pack under test.

[0036] The second connector is connected to the air inlet of the air tightness tester and mates with the vent connector of the battery pack under test;

[0037] The first connector and the second connector are respectively equipped with one of the horizontal moving units and the drive unit.

[0038] The beneficial effects that this invention can produce include:

[0039] This invention provides an automatic battery pack airtightness testing device. Through the design of measuring and adjusting components, it adaptively calibrates the target position of the testing connector based on the current position of the charge / discharge connector of the battery pack under test. This ensures precise alignment between the testing connector and the charge / discharge connector of the battery pack under test. This not only reduces labor intensity and saves production costs but also significantly improves the service life of the connector and the speed and accuracy of the sealing test of the battery pack (pack) under test, shortening the testing cycle for a single sample and reducing the false positive rate. Furthermore, this device is suitable not only for airtightness testing of battery packs of different standard models but also for battery packs with non-standard structures, exhibiting wide applicability and strong compatibility. Compared to traditional sealing testing methods, this invention's device offers faster speed, higher accuracy, and lower cost advantages, making it ideal for applications in large-scale production and quality control. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the detection unit of an automatic battery pack airtightness detection device according to the present invention;

[0041] Figure 2 In this invention Figure 1 Top view;

[0042] Figure 3 In this invention Figure 2 A schematic diagram of the structure of the feeding unit is provided on one side;

[0043] In the diagram: 1. Feeding unit, 2. Clamping and positioning assembly, 3. Measuring component, 4. Driving component, 5. Battery pack under test, 6. Air tightness tester, 7. Control box, 8. Display, 9. Base, 10. Display interface, 11. Control button, 12. Lifting platform, 13. Guide rail, 14. First drive motor, 15. First lead screw, 16. Lead screw seat, 17. Slider, 18. Guide column, 19. Second drive motor, 20. Second lead screw, 21. Bracket, 22. First connector, 23. Second connector, 24. Inflation connector, 25. Deflator connector, 26. Positioning cylinder, 27. Clamping block, 28. Positioning mechanism, 29. Travel limit switch. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figure 1 and Figure 2As shown, the present invention provides an automatic battery pack airtightness testing device. The device includes a clamping and positioning component 2 mounted on a feeding unit 1, and a testing unit located on one side of the feeding unit 1. The testing unit includes a measuring component 3, an adjusting component, a driving component 4, a control terminal, and an airtightness tester 6. The control terminal is connected to the clamping and positioning component 2, the measuring component 3, the adjusting component, the driving component 4, and the airtightness tester 6. The measuring component 3 is used to obtain the current position of the charging / discharging connector of the battery pack 5 to be tested after the feeding unit 1 conveys the battery pack 5 to be tested to a preset station and clamps and fixes it by the clamping and positioning component 2, and then uploads it to the control terminal. The adjusting component is located near the charging / discharging connector of the battery pack 5 to be tested. The output end of the adjusting component is equipped with a testing connector. The control terminal calculates the adjustment parameters between the initial position and the target position of the testing connector based on preset adjustment rules, and controls the adjusting component to adjust the initial position of the testing connector to the target position according to the adjustment parameters. The preset adjustment rule is that the target position of the test connector is referenced to the current position of the charging / discharging connector of the battery pack 5 under test. After the test connector moves to the target position according to the preset motion trajectory, it mates with the charging / discharging connector of the battery pack 5 under test. An adjustment component is installed at the output end of the drive component 4. When the adjustment component adjusts the initial position of the test connector to the target position, the control terminal controls the adjustment component to move according to the preset motion trajectory, so that the test connector mates with the charging / discharging connector of the battery pack 5 under test. The airtightness tester 6 has its air inlet and outlet connected to the test connector through pipelines. When the test connector mates with the charging / discharging connector of the battery pack 5 under test, the airtightness test of the battery pack 5 under test is performed. The test range is 0-0.6MPa. The air inlet volume is controlled according to the preset control rule to simulate the airtightness test environment under different working conditions. The preset control rule is to load the airtightness test environment under different working conditions according to the test requirements of the battery pack 5 under test.

[0046] In this embodiment, when detecting the critical value of the battery pack 5 under test, the preset control rule is that the airtightness tester 6 adjusts the test pressure to the critical value (e.g., 0.5 MPa) of the battery pack 5 under test and performs a stable voltage test within a preset time period to output the current test result, and determines whether the current test result is consistent with the critical value of the battery pack 5 under test; if consistent, the airtightness of the battery pack 5 under test is good; if inconsistent, the airtightness of the battery pack 5 under test is damaged; at this time, the tester can determine whether the airtightness of the battery pack 5 under test exceeds the preset detection threshold by analyzing whether the difference between the current test result and the critical value of the battery pack 5 under test exceeds the preset detection threshold. The test status of battery pack 5 is measured. If it exceeds the preset test threshold, it indicates that the airtightness of battery pack 5 is severely damaged and rework is required. If it does not exceed the preset test threshold, it indicates that the airtightness of battery pack 5 is moderately damaged, which may be due to air leakage in the pipeline, damage to the test connector, or incomplete fit. In this case, the test status of two or more adjacent battery packs 5 is checked to see if they are all moderately damaged in terms of airtightness. If so, the pipeline and test connector need to be checked. If not, the battery pack 5 needs to be reworked to eliminate equipment failure and reduce the rework rate.

[0047] In the above, the preset control rules allow for arbitrary setting of the number of tests and the test path when detecting the critical value of each battery pack 5 under test; such as single critical value detection, multiple interval critical value detection, and fluctuating detection within a preset test pressure range; among them, multiple interval critical value detection is set to divide the current test cycle into multiple consecutive test intervals, and use the same test pressure or different test pressures to test the airtightness of the battery pack 5 under test in any two or more test intervals; fluctuating detection within a preset test pressure range is set to perform cyclical detection within the current test cycle according to the preset test pressure range from small to large or from large to small. This simulates the airtightness testing environment under different working conditions to detect the corresponding critical value of the battery pack 5 under test, improving the applicability of the equipment.

[0048] In the above process, after the test is completed, the control terminal first controls the airtightness tester 6 to depressurize the test connector, then controls the drive component 4 to reset so that the test connector is disengaged from the charging / discharging connector of the battery pack 5 under test, and finally controls the clamping and positioning component 2 to release the tested battery pack so that the feeding unit 1 can transport the next set of battery packs 5 under test to the preset station for the next batch of airtightness testing. To accurately achieve automatic loading and unloading of the battery packs 5 under test, the control terminal can control the start and stop of the feeding unit 1.

[0049] In the above-described process, by designing measuring element 3 and adjusting element, the target position of the testing connector is adaptively calibrated according to the current position of the charging / discharging connector of the battery pack 5 under test. This ensures precise alignment between the testing connector and the charging / discharging connector of the battery pack 5 under test, reducing labor intensity and saving production costs. Furthermore, it significantly improves the service life of the connector and the speed and accuracy of the sealing test of the battery pack 5 (packet), shortening the testing cycle for a single sample and reducing the false positive rate. Moreover, this equipment is suitable not only for gas-tightness testing of battery packs 5 of different standard models but also for non-standardized structures, exhibiting wide applicability and strong compatibility. Compared to traditional sealing testing methods, the equipment of this invention offers faster speed, higher accuracy, and lower cost advantages, making it ideal for applications in large-scale production and quality control.

[0050] In this embodiment, the control terminal adopts a microcontroller. By embedding a pre-set PLC control program into the microcontroller, the clamping and positioning component 2, measuring component 3, adjusting component, driving component 4 and airtightness tester 6 are controlled to perform coordinated actions.

[0051] Furthermore, the equipment also includes a control box 7 and a display 8; the control terminal is placed inside the control box 7 for protection; the top of the control box 7 extends upwards on opposite sides to form U-shaped support sections with upward openings to fix the base 9; the display 8, measuring element 3, adjusting element, and driving element 4 are respectively mounted on the top of the base 9; the display 8 has a display interface 10 and several operating buttons 11, which are respectively connected to the control terminal and the airtightness tester 6 for controlling the start and stop of the control terminal and the airtightness tester 6; the display interface 10 is connected to the airtightness tester 6 for displaying the test results of the airtightness tester 6. In the above, the display 8 has a built-in processing unit and a storage unit. The processing unit outputs the test results to the display interface 10 and the storage unit according to a preset report format, and the storage unit is used to save the test results for later viewing.

[0052] Furthermore, the adjusting component includes a horizontal moving unit and a vertical moving unit. The horizontal moving unit is installed at the output end of the driving component 4, and the detection connector is also installed at the output end of the horizontal moving unit. The vertical moving unit is installed on the base 9, and its output end extends through the base 9 and above the base 9 to where a lifting platform 12 is mounted. The driving component 4 is installed on the lifting platform 12. In the above, the horizontal moving unit includes a guide rail 13 and a first telescopic component. The guide rail 13 is installed at the output end of the driving component 4. The first telescopic component is installed on the guide rail 13, and its output direction is parallel to the conveying direction of the feeding unit 1. The detection connector is installed at the output end of the first telescopic component, and the first telescopic component controls the movement of the detection connector in the horizontal direction to achieve lateral calibration of the detection connector. The vertical movement unit includes a second telescopic member and several guide posts 18. The second telescopic member is installed at the bottom of the base 9, and its output end passes through the top of the base 9 and is connected to the lifting platform 12. One end of each guide post 18 is fixedly connected to the bottom of the lifting platform 12, and the other end passes through the base 9. When the second telescopic member outputs to its maximum stroke, the guide post 18 and the base 9 are in a cooperative relationship to guide and limit the lifting platform 12 when the second telescopic member drives the lifting platform 12 to move. This allows the second telescopic member to control the movement of the detection connector in the vertical direction, thereby achieving vertical calibration of the detection connector.

[0053] In this embodiment, the first telescopic component includes a first drive motor 14, a first lead screw 15, a lead screw seat 16, and a slider 17. The first drive motor 14 is mounted on the guide rail 13. One end of the first lead screw 15 is mounted on the output end of the first drive motor 14 via a coupling, and the other end of the first lead screw 15 extends toward the conveying direction of the feeding unit 1 or the opposite direction. The lead screw seat 16 is sleeved on the outer periphery of the lead screw to fix the detection connector. The slider 17 is slidably mounted on the outer periphery of the guide rail 13 and fixedly connected to the lead screw seat 16. Specifically, the first drive motor 14 drives the first lead screw 15 to rotate, thereby driving the lead screw seat 16 to move the detection connector in the horizontal direction. The slider 17 guides and limits the lead screw seat 16 through the cooperation between it and the guide rail 13, thereby improving the calibration accuracy of the detection connector.

[0054] In this embodiment, the second telescopic component includes a second drive motor 19 and a second lead screw 20. The second drive motor 19 is fixedly installed at the bottom of the base 9. One end of the second lead screw 20 is installed at the output end of the second drive motor 19 via a coupling, and the other end passes through the base 9 and the lifting platform 12 in sequence. The second lead screw 20 is rotatably connected to the base 9 and threadedly connected to the lifting platform 12. Specifically, the second drive motor 19 drives the second lead screw 20 to rotate, thereby driving the lifting platform 12 to move vertically to achieve vertical calibration of the test joint.

[0055] In the above description, to improve control accuracy, the first drive motor 14 and the second drive motor 19 are both servo motors. It should be noted that in other embodiments, the first and second telescopic members can also be replaced by structures capable of reciprocating movement, such as cylinders, hydraulic cylinders, or electric telescopic rods.

[0056] Furthermore, the measuring element 3 is a charge-coupled device (CCD), which is fixedly mounted on the lifting platform 12 via a bracket 21. In this embodiment, to ensure the stability and rationality of the structure, guide grooves are provided on both sides of the bracket 21 to guide the installation of the guide rail 13. It is worth noting that a CCD is a detection element that uses charge quantity to represent signal magnitude and transmits signals via coupling. It has a series of advantages such as self-scanning, wide sensing spectrum range, small distortion, small size, light weight, low system noise, low power consumption, long life, and high reliability. The CCD can be trained according to the above-mentioned preset adjustment rules to generate a corresponding measurement system to accurately measure the current position of the charging / discharging connector of the battery pack 5 under test. Specifically, the measurement system has a photoelectric conversion array, a transfer grid, a charge shift register array, a detection circuit, and a signal processing circuit. The photoelectric conversion array consists of multiple photoelectron clusters arranged to form a collection surface, which covers one side of the charging / discharging connector of the battery pack 5 under test at the preset work position to capture the battery pack 5 under test. The system captures an optical image of the charge / discharge connector and inputs it into a transfer gate to generate electron-hole pairs. The majority carriers are displaced by the gate voltage of the transfer gate, while the minority carriers are collected in the potential well of the transfer gate to form a signal charge, thus achieving photoelectric conversion. This signal charge is then injected into a charge shift register array for directional transmission. A detection circuit collects the signal charge output from the charge shift register array and inputs it to a signal processing circuit. The signal processing circuit marks the position information of each transmission channel according to the architecture of the charge shift register array and generates the current position of the charge / discharge connector of the battery pack 5 under test based on the position information of the transmission channel corresponding to the received signal charge. The architecture of the charge shift register array is based on the arrangement of photoelectron clusters and has a transmission channel corresponding to each photoelectron cluster.

[0057] In the above, the driving component 4 is a cylinder, a hydraulic cylinder, or an electric push rod; preferably, the driving component 4 is a cylinder, and the cylinder is equipped with a high-pressure air supply unit, which is connected to a control terminal to control the output stroke of the driving component 4 through the control terminal.

[0058] Furthermore, in order to improve the docking accuracy between the test connector and the battery pack 5 under test, the test connector is designed as a first connector 22 and a second connector 23; the first connector 22 is connected to the air outlet of the air tightness tester 6 and cooperates with the air inlet 24 of the battery pack 5 under test; the second connector 23 is connected to the air inlet of the air tightness tester 6 and cooperates with the air outlet 25 of the battery pack 5 under test; the first connector 22 and the second connector 23 are respectively equipped with a horizontal moving unit and a driving component 4 to achieve independent calibration of the two connectors in the horizontal direction. The specific calibration method refers to the horizontal calibration method described above.

[0059] In the above, such as Figure 3 As shown, the clamping and positioning assembly 2 includes at least two sets of clamping members and one set of positioning members. The two sets of clamping members are arranged opposite each other on opposite sides of the preset station of the feeding unit 1, and the positioning member is arranged on the discharge end side of the preset station of the feeding unit 1, so as to block and limit the battery pack 5 to be tested when it is transported to the preset station, and to clamp and fix it by the two sets of clamping members. In this embodiment, four sets of clamping members are provided, and the four sets of clamping members are respectively arranged at the four corners of the preset station. The clamping member includes a positioning cylinder 26 and a clamping device installed at the output end of the positioning cylinder 26. Block 27, the clamping block 27 has an L-shaped structure, forming a rectangular frame at the four corners of the preset station to achieve precise clamping of the battery pack 5 to be tested; the positioning component includes a positioning mechanism 28 and a travel limit switch 29, which are respectively set at the discharge end of the preset station. When the travel limit switch 29 detects that the battery pack 5 to be tested has reached the preset station, the positioning mechanism 28 pushes the battery pack 5 to be tested upward to block and limit it. After the test is completed, the positioning mechanism 28 retracts downward to release the tested battery pack.

Claims

1. An automatic battery pack airtightness testing device, the device comprising a clamping and positioning assembly (2) disposed on a feeding unit (1), and a testing unit located on one side of the feeding unit (1), characterized in that, The detection unit includes: The measuring component (3) is used to transport the battery pack (5) to be tested to the preset station by the feeding unit (1) and to obtain the current position of the charging and discharging connector of the battery pack (5) to be tested and upload it to the control terminal after clamping and fixing it by the clamping and positioning component (2). An adjustment component is located near the charging / discharging connector of the battery pack (5) under test. A detection connector is installed at the output end of the adjustment component. The control terminal calculates the adjustment parameters between the initial position and the target position of the detection connector based on a preset adjustment rule, and controls the adjustment component to adjust the initial position of the detection connector to the target position according to the adjustment parameters. The preset adjustment rule is: the target position of the detection connector is referenced to the current position of the charging / discharging connector of the battery pack (5) under test. After the detection connector moves to the target position according to a preset motion trajectory, it cooperates with the charging / discharging connector of the battery pack (5) under test. The drive unit (4) has the adjustment unit installed at its output end. When the adjustment unit adjusts the initial position of the detection connector to the target position, the control terminal controls the adjustment unit to move according to a preset motion trajectory, so that the detection connector cooperates with the charging / discharging connector of the battery pack (5) under test. An air tightness tester (6) has its inlet and outlet connected to the test connector via pipelines. When the test connector is engaged with the charging / discharging connector of the battery pack (5) under test, it performs air tightness testing on the battery pack (5). The tester also simulates different operating conditions by controlling the air intake according to preset control rules. The preset control rules are as follows: The air tightness testing environment under different working conditions is loaded according to the testing requirements of the battery pack (5) under test; The adjusting component includes a horizontal moving unit, which is installed at the output end of the driving component (4), and the detection connector is installed at the output end of the horizontal moving unit; The detection connector has a first connector (22) and a second connector (23); the first connector (22) and the second connector (23) are respectively configured with a horizontal moving unit and a driving member (4).

2. The automatic battery pack airtightness testing device according to claim 1, characterized in that, The device also includes a control box (7) and a display (8); The control terminal is placed inside the control box (7), and a base (9) is provided on the top of the control box (7). The measuring component (3), the adjusting component and the driving component (4) are respectively installed on the base (9). The display (8) is mounted on the base (9). The display (8) has a display interface (10) and several operation buttons (11). The operation buttons (11) are connected to the control terminal and the airtightness detector (6) respectively, and are used to control the start and stop of the control terminal and the airtightness detector (6). The display interface (10) is connected to the airtightness tester (6) and is used to display the test results of the airtightness tester (6).

3. The automatic battery pack airtightness testing device according to claim 2, characterized in that, The adjusting component also includes a vertical moving unit, which is mounted on the base (9). The output end of the vertical moving unit passes through the base (9) and extends to the top of the base (9) where a lifting platform (12) is provided. The driving component (4) is mounted on the lifting platform (12).

4. The automatic battery pack airtightness testing device according to claim 3, characterized in that, The horizontal movement unit includes: The guide rail (13) is installed at the output end of the drive unit (4); The first telescopic component is installed on the guide rail (13), and the output direction of the first telescopic component is parallel to the conveying direction of the feeding unit (1). The detection connector is installed at the output end of the first telescopic component.

5. The automatic battery pack airtightness testing device according to claim 4, characterized in that, The first telescopic component includes: The first drive motor (14) is mounted on the guide rail (13); The first lead screw (15) is installed at the output end of the first drive motor (14); A lead screw seat (16) is sleeved on the outer periphery of the lead screw to fix the detection connector; The slider (17) is slidably mounted on the outer periphery of the guide rail (13) and connected to the lead screw seat (16).

6. The automatic battery pack airtightness testing device according to claim 3, characterized in that, The vertical movement unit includes: The second telescopic component is installed at the bottom of the base (9), and the output end of the second telescopic component passes through the top of the base (9) and is connected to the lifting platform (12). Several guide pillars (18) are provided, one end of each guide pillar (18) is connected to the bottom of the lifting platform (12), and the other end is provided through the base (9). When the second telescopic member outputs to the maximum stroke, the guide pillar (18) and the base (9) are in a cooperative relationship.

7. The automatic battery pack airtightness testing device according to claim 6, characterized in that, The second telescopic component includes: The second drive motor (19) is installed at the bottom of the base (9); The second lead screw (20) is installed at one end of the output end of the second drive motor (19) and the other end passes through the base (9) and the lifting platform (12) in sequence. The second lead screw (20) is rotatably connected to the base (9) and threadedly connected to the lifting platform (12).

8. The automatic battery pack airtightness testing device according to claim 3, characterized in that, The measuring device (3) is a charge-coupled device, which is mounted on the lifting platform (12) via a bracket (21).

9. The automatic battery pack airtightness testing device according to claim 1, characterized in that, The driving component (4) is a cylinder, a hydraulic cylinder, or an electric push rod; Furthermore, the cylinder is equipped with a high-pressure air supply unit.

10. The automatic battery pack airtightness testing device according to claim 3, characterized in that, The first connector (22) is connected to the air outlet of the air tightness tester (6) and is engaged with the air inlet (24) of the battery pack (5) under test; The second connector (23) is connected to the air inlet of the air tightness tester (6) and is matched with the vent connector (25) of the battery pack (5) to be tested.

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