BMS signal precision testing device resistant to environmental interference

Abstract

The application provides an environmental interference-resistant BMS signal precision testing device, and belongs to the technical field of BMS testing.The device comprises a support base, a driving shaft, a first shielding shell, a probe testing plate and an electric push rod, the support base is provided with a conveying belt with a partition plate, the driving shaft is flexibly connected to the rotating roller of the conveying belt through a connecting assembly, is used for allowing relative slip when the resistance of the rotating roller increases, the first shielding shell is provided with a second shielding shell with a shielding plate above, the second shielding shell is provided with the probe testing plate which is electrically connected to a signal detector, the electric push rod is slidably arranged above the first shielding shell and is used for driving the second shielding shell to descend so that the shielding plate and the partition plate form a shielding space.The application realizes online testing under the continuous operation of the conveying belt through flexible connection, constructs an anti-interference testing environment through the liftable shielding structure, and facilitates the replacement of the probe testing plate, and significantly improves the efficiency and accuracy of BMS signal precision testing.

Description

Technical Field

[0001] This invention belongs to the field of BMS testing technology, and particularly relates to a BMS signal accuracy testing device that is resistant to environmental interference. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In a battery management system (BMS), signal accuracy is crucial to system stability, thus requiring the use of a BMS signal testing device. Existing BMS testing devices mostly reduce the risk of connector deformation by incorporating conformal plugs and elastic components.

[0004] However, such devices still have the following technical shortcomings in practical applications: Firstly, existing testing equipment cannot be used with conveyor belts that are in continuous operation, requiring the conveyor belt to be stopped during testing, resulting in low testing efficiency.

[0005] Secondly, existing signal testing devices lack the ability to resist environmental interference. In complex industrial environments, external electromagnetic signals can easily affect the accuracy of test results, and it is not convenient to conduct comparative tests between shielded and unshielded states to verify signal accuracy. At the same time, the probe test boards inside the testing device are inconvenient to replace, resulting in low maintenance and debugging efficiency. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, the present invention provides a BMS signal accuracy testing device that is resistant to environmental interference. It enables online testing under continuous operation of the conveyor belt through flexible connection, constructs an interference-resistant testing environment through a liftable shielding structure, and facilitates the replacement of probe test boards, thus significantly improving the efficiency and accuracy of BMS signal accuracy testing.

[0007] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions: The first aspect of the present invention provides a BMS signal accuracy testing device that is resistant to environmental interference.

[0008] A BMS signal accuracy testing device resistant to environmental interference includes: a support base, a drive shaft, a first shielding shell, a probe plate, and an electric push rod; The support base is provided with a housing, and a conveyor belt with spaced partitions is fitted on the outside of the housing; The drive shaft is flexibly connected to the rotating rollers in the conveyor belt via a connecting assembly, which allows the drive shaft to slide relative to the rotating rollers when the rotational resistance of the rotating rollers increases. The first shielding shell is fixed to one side of the outer shell, and support assemblies for supporting the second shielding shell are installed on both sides of the first shielding shell; shielding plates are fixed on both sides of the second shielding shell, and signal detectors are hinged to the shielding plates; the signal detectors are electrically connected to the probe plate inside the second shielding shell. The electric push rod is slidably mounted above the first shielding shell and is used to drive the second shielding shell to descend, so that the shielding plate and the partition plate form a shielding space for BMS signal accuracy testing.

[0009] Furthermore, a support frame is provided on the support base, and a connecting frame is fixedly connected to the support frame; the electric push rod is slidably mounted on the connecting frame.

[0010] Furthermore, the connecting frame is provided with a movable groove, and a slider is slidably installed in the movable groove. The slider is fixedly connected to the electric push rod.

[0011] Furthermore, the electric push rod is provided with a pressing assembly, which includes: a pressure plate, an extension tube disposed on the pressure plate, a slip ring disposed on the extension tube, and a mounting plate disposed on the slip ring; wherein the slip ring is slidably connected to the electric push rod, and the pressure plate is made of rubber.

[0012] Furthermore, the connecting component includes a support block fixedly connected to the first spring, a first groove formed on the support block, and a locking block disposed in the first groove; wherein the first spring is installed inside the drive shaft.

[0013] Furthermore, the roller has a second groove for engaging with the locking block, and the locking block has a spherical structure.

[0014] Furthermore, openings are provided on both sides of the first shielding shell, and the inner wall of the opening fits against the outer wall of the partition; at the same time, an inner groove for docking with the shielding plate is provided in the middle of the partition, and an installation groove for docking with the shielding plate is provided on the first shielding shell.

[0015] Furthermore, the support assembly includes: a first side plate fixedly connected to both sides of the first shielding shell, a guide rod and a second spring fixedly connected to the first side plate, and a second side plate slidably installed on the outside of the guide rod.

[0016] Furthermore, the second side plate is fixedly connected to the second shielding shell.

[0017] Furthermore, a support frame is installed inside the second shielding shell, and the probe plate is placed on the support frame.

[0018] The above one or more technical solutions have the following beneficial effects: The device designed in this invention is equipped with a flexible transmission structure consisting of a drive shaft, a first spring, and connecting components. When the partition on the conveyor belt is pressed by the shielding plate, causing the rotation resistance of the roller to increase, the locking block on the drive shaft will compress the first spring and slide on the second groove of the roller, so that the drive shaft can keep rotating while the roller stops. This solves the problem that existing testing devices cannot be used with continuously running conveyor belts, and the conveyor belt must be stopped, resulting in low efficiency.

[0019] This invention, on one hand, constructs a closed electromagnetic shielding cavity on the conveyor belt by pressing a first shielding shell together with a liftable second shielding shell. This, combined with shielding plates on both sides of the second shielding shell passing through openings and engaging with the inner groove of the partition and the mounting groove of the first shielding shell, effectively resists interference from external electromagnetic signals on test accuracy. Simultaneously, when signal accuracy verification is required, the second shielding shell can be controlled to remain stationary, preventing the shielding plates from engaging with the partition, thus enabling comparative testing in an unshielded state. On the other hand, an electric push rod is slidably mounted above the first shielding shell. When replacing the probe plate, simply slide the electric push rod horizontally out of the area above the second shielding shell, shorten the electric push rod, and use the pressing component to support the flipped signal detector. The probe plate can then be directly removed and placed from the support frame. This provides ample operating space and eliminates the need for complex disassembly and assembly, significantly improving the convenience of maintenance and debugging.

[0020] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 This is a structural diagram of a BMS signal accuracy testing device that resists environmental interference according to Embodiment 1 of the present invention.

[0023] Figure 2 This is a schematic diagram of the connection structure between the second shielding shell and the signal detector in Embodiment 1 of the present invention.

[0024] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A shown in the figure.

[0025] Figure 4 This is a schematic diagram of the unfolded state of the signal detector in Embodiment 1 of the present invention.

[0026] Figure 5 This is a schematic diagram of the internal structure of the conveyor belt in Embodiment 1 of the present invention.

[0027] Figure 6 for Figure 5 An enlarged schematic diagram of the structure at point B shown in the diagram.

[0028] Figure 7 for Figure 5 An enlarged schematic diagram of the structure at point C shown in the diagram.

[0029] In the diagram: 1. Support base; 2. Outer shell; 3. Conveyor belt; 4. Partition plate; 5. Drive shaft; 6. Rotary roller; 7. First spring; 8. Connecting assembly; 801. Support block; 802. First groove; 803. Locking block; 804. Second groove; 9. Support frame; 10. Connecting frame; 11. Moving groove; 12. Slider; 13. Electric push rod; 14. Pressing assembly; 1401. Pressure plate; 1402. Extension tube; 1403. Slip ring; 1404. Mounting plate; 15. First shielding shell; 16. Opening; 17. Inner groove; 18. Mounting groove; 19. Support assembly; 1901. First side plate; 1902. Guide rod; 1903. Second spring; 1904. Second side plate; 20. Second shielding shell; 21. Signal detector; 22. Shielding plate; 23. Support frame; 24. Probe plate. Detailed Implementation

[0030] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations of the present invention.

[0032] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0033] Example 1 This embodiment discloses a BMS signal accuracy testing device that is resistant to environmental interference.

[0034] A BMS signal accuracy testing device resistant to environmental interference includes: a support base, a drive shaft, a first shielding shell, a probe plate, and an electric push rod; The support base is provided with a housing, and a conveyor belt with spaced partitions is fitted on the outside of the housing; The drive shaft is flexibly connected to the rotating rollers in the conveyor belt via a connecting assembly, which allows the drive shaft to slide relative to the rotating rollers when the rotational resistance of the rotating rollers increases. The first shielding shell is fixed to one side of the outer shell, and support assemblies for supporting the second shielding shell are installed on both sides of the first shielding shell; shielding plates are fixed on both sides of the second shielding shell, and signal detectors are hinged to the shielding plates; the signal detectors are electrically connected to the probe plate inside the second shielding shell. The electric push rod is slidably mounted above the first shielding shell and is used to drive the second shielding shell to descend, so that the shielding plate and the partition plate form a shielding space for BMS signal accuracy testing.

[0035] Based on the above-described structured design, this invention enables online testing under continuous conveyor belt operation through flexible connections, constructs an anti-interference testing environment through a liftable shielding structure, and facilitates the replacement of probe test boards, significantly improving the efficiency and accuracy of BMS signal precision testing. To facilitate understanding of the technical solution of this invention, the specific implementation methods of this invention will be further explained and described below.

[0036] like Figure 1 As shown, a housing 2 and a support frame 9 are mounted on the support base 1. Specifically, a conveyor belt 3 is mounted on the housing 2, a rotating roller 6 is installed inside the conveyor belt 3, and a partition 4 is mounted on the conveyor belt 3. Meanwhile, a connecting frame 10 is fixedly connected to the support frame 9, and an electric push rod 13 is slidably mounted on the connecting frame 10, with a pressing component 14 mounted on the electric push rod 13. Thus, the support base 1 serves as the foundation of the entire device, providing a stable mounting foundation for the housing 2 and the support frame 9, ensuring the structural stability of the device during long-term continuous operation. The housing 2 is symmetrically distributed on both sides of the conveyor belt 3, not only providing effective support and limiting the conveyor belt 3 to prevent swaying during operation, but also providing a reliable connection interface for the subsequent fixing of the first shielding shell 15. The rotating roller 6 inside the conveyor belt 3 supports and drives the conveyor belt 3 to circulate, while the partitions 4 installed at intervals on the conveyor belt 3 form multiple independent test product placement stations, ensuring that each test circuit board remains isolated from each other during transport, avoiding collisions or stacking between products. The support frame 9 is fixedly connected to the support base 1, providing rigid support for the connecting frame 10, which in turn serves as a sliding mounting base for the electric push rod 13. The electric push rod 13 is slidably mounted on the connecting frame 10. This sliding freedom allows the electric push rod 13 to be adjusted in the horizontal direction, ensuring it is accurately positioned directly above the second shielding shell 20 to apply downward pressure during testing, and also allowing it to be moved horizontally when the probe plate 24 needs to be replaced, providing unobstructed operating space for the flipping and unfolding of the signal detector 21. The pressing component 14 is installed at the output end of the electric push rod 13. Its function is to convert the linear motion of the electric push rod 13 into uniform downward pressure on the second shielding shell 20, preventing the second shielding shell 20 from tilting or jamming due to single-point force application.

[0037] A first shielding shell 15 is fixedly mounted on the outer casing 2, with openings 16 on both sides of the first shielding shell 15. Supporting components 19 are installed on both sides of the first shielding shell 15, and a second shielding shell 20 is mounted on the supporting components 19. A signal detector 21 is hinged to the second shielding shell 20, and shielding plates 22 are installed on both sides of the second shielding shell 20. A probe plate 24 is disposed inside the second shielding shell 20. Since the first shielding shell 15 is fixedly mounted on the outer casing 2, its internal space constitutes the main testing area. The inner walls of the openings 16 on both sides of the first shielding shell 15 fit snugly against the outer walls of the partition 4. This design allows the partition 4 to pass precisely through the openings 16 into the interior of the first shielding shell 15 when the conveyor belt 3 moves it. Simultaneously, the small gap between the openings 16 and the partition 4 ensures smooth conveying while minimizing electromagnetic signal leakage channels, creating conditions for constructing a shielded environment. Support components 19 are installed on both sides of the first shielding shell 15, and the second shielding shell 20 supported on it can be raised and lowered relative to the first shielding shell 15. When the electric push rod 13 drives the second shielding shell 20 to descend and press it against the first shielding shell 15, the two together form a relatively sealed cavity. The shielding plates 22 fixed on both sides of the second shielding shell 20 will pass through the opening 16 and extend downward during the descent of the second shielding shell 20, forming a more complete electromagnetic barrier with the partition 4 and the side wall of the first shielding shell 15. The signal detector 21 is hinged to the second shielding shell 20. This hinged connection allows the signal detector 21 to be flipped upward to expose the probe plate 24 underneath, making it easy for operators to pick up, put down and replace the probe plate 24. The probe plate 24 is set inside the second shielding shell 20 and electrically connected to the signal detector 21. When the second shielding shell 20 descends, the probe plate 24 moves down with it and contacts the test point of the circuit board under test on the conveyor belt 3, realizing signal acquisition and transmission. In summary, the coordinated operation of the first shielding shell 15, the second shielding shell 20, the shielding plate 22, the signal detector 21, and the probe test board 24 constitutes a functional module that integrates anti-interference shielding, signal testing, and convenient maintenance.

[0038] Furthermore, the support base 1, outer shell 2, support frame 9, connecting frame 10, and first shielding shell 15 are fixedly connected as a single structure, with the outer shell 2 symmetrically distributed on both sides of the conveyor belt 3. This fixed connection significantly improves the rigidity and operational stability of the entire device. During long-term continuous testing, the components will not experience relative displacement due to vibration or external forces, thus ensuring the relative positional accuracy between the conveyor belt 3 and the first shielding shell 15. Specifically, this ensures that the partition 4 can always accurately pass through the opening 16 without scratching or jamming. Simultaneously, the overall structural design simplifies the installation and commissioning process. Users only need to fix the support base 1 to the working ground or platform to ensure that the spatial relationship of all upper components is calibrated at once, eliminating the need for tedious individual adjustments to each component. The outer casings 2 are symmetrically distributed on both sides of the conveyor belt 3. This symmetrical layout ensures that the conveyor belt 3 is subjected to uniform force during operation. The outer casings 2 on both sides together constrain the conveyor belt 3, preventing it from shifting or derailing when operating at high speed or under lateral forces. Furthermore, the symmetrical structure provides symmetrical installation positions for any auxiliary components that may be added later (such as sensors, limit switches, etc.), facilitating automated control of the testing process. The overall structure and symmetrical layout design maximize the mechanical reliability, operational stability, and ease of maintenance of the device while ensuring functionality.

[0039] A drive shaft 5 is rotatably mounted inside the roller 6. The drive shaft 5 is rotatably connected to the outer casing 2. A connecting assembly 8 is provided between the drive shaft 5 and the roller 6. A first spring 7 is installed inside the drive shaft 5. The rotatable connection between the drive shaft 5 and the outer casing 2 means that the drive shaft 5 is driven to rotate by an external power source (such as a motor), and the rotation axis of the drive shaft 5 coincides with the rotation axis of the roller 6, ensuring coaxiality of the transmission and avoiding eccentric vibration. The first spring 7 installed inside the drive shaft 5 is a key component of the connecting assembly 8. Its function is to provide preload, enabling the connecting assembly 8 to reliably transmit the torque of the drive shaft 5 to the roller 6 under normal operating conditions. When the rotational resistance of the roller 6 increases abnormally (for example, when the shield plate 22 presses against the partition plate 4 during testing, causing the conveyor belt 3 to be obstructed), the first spring 7 can be compressed, changing the rigid connection between the drive shaft 5 and the roller 6 into a flexible connection, thereby allowing the drive shaft 5 to slip relative to the roller 6. The introduction of this flexible transmission mechanism solves the drawback of the existing rigid transmission system where "if one component gets stuck, the whole system stops." This allows the drive shaft 5 to continue rotating while the roller 6 pauses or slows down as needed, ensuring both the continuous supply of materials upstream of the conveyor belt 3 and the ability of the product under test in the test area to remain stably for a sufficiently long test time.

[0040] The connecting assembly 8 includes a support block 801 fixedly connected to the first spring 7. The support block 801 has a first groove 802, and a locking block 803 is disposed within the first groove 802. The rotating roller 6 has a second groove 804 for engaging with the locking block 803. The locking block 803 has a spherical structure. Under normal conveying conditions, the preload of the first spring 7 presses the locking block 803 into the second groove 804 via the support block 801. The locking block 803 abuts against the sidewall of the second groove 804, thereby transmitting the rotational torque of the drive shaft 5 to the rotating roller 6, driving the conveyor belt 3 to operate normally. During testing, when the shielding plate 22 presses against the partition plate 4, increasing the rotational resistance of the rotating roller 6, the reverse force exerted by the sidewall of the second groove 804 on the locking block 803 increases accordingly. This force is transmitted to the first spring 7 through the locking block 803 and the support block 801, causing the first spring 7 to be compressed. When the compression exceeds the critical value, the locking block 803 disengages from the second groove 804. The drive shaft 5 continues to rotate while the locking block 803 slides along the inner wall of the roller 6. At this point, the torque of the drive shaft 5 is no longer transmitted to the roller 6, and the roller 6 stops rotating. The locking block 803 adopts a spherical structure, and the contact between its spherical surface and the second groove 804 and the inner wall of the roller 6 is point contact or small-area contact, resulting in low frictional resistance and smooth sliding. Furthermore, the spherical structure can automatically reset after sliding. When the resistance of the roller 6 decreases, the restoring force of the first spring 7 will push the locking block 803 back into the second groove 804, restoring torque transmission. This mechanical flexible transmission scheme based on the spherical locking block and spring is simple in structure, highly reliable, and requires no electronic sensors or controllers. It can automatically switch the conveyor belt 3 between continuous operation and intermittent stop, significantly reducing equipment costs and failure rates.

[0041] A sliding groove 11 is provided on the connecting frame 10, and a slider 12 is slidably installed in the sliding groove 11. The slider 12 is fixedly connected to the electric push rod 13. The sliding groove 11 on the connecting frame 10 and the slider 12 cooperate to form a horizontal sliding guide mechanism for the electric push rod 13. The cross-sectional shape of the sliding groove 11 matches the outer contour of the slider 12, ensuring that the slider 12 can only slide in a straight line in the horizontal direction within the sliding groove 11, without deviation or wobbling. The slider 12 is fixedly connected to the electric push rod 13. When the operator manually or through an external mechanism pushes the electric push rod 13, the slider 12 drives the electric push rod 13 to move horizontally along the sliding groove 11. The introduction of this sliding mechanism allows the electric push rod 13 to have two distinct working positions in the horizontal direction: the first working position is the test position, where the electric push rod 13 is located directly above the second shielding shell 20, with its output end aligned with the top center area of ​​the second shielding shell 20, enabling it to apply uniform downward pressure to press the second shielding shell 20 against the first shielding shell 15; the second working position is the maintenance position, where the electric push rod 13 slides horizontally out of the area above the second shielding shell 20 along the moving groove 11, providing unobstructed space for the flip-opening of the signal detector 21. Limiting structures (such as limiting blocks or buffer pads) can be provided at both ends of the moving groove 11 to prevent the slider 12 from slipping and to absorb impact energy. In summary, the sliding cooperation between the moving groove 11 and the slider 12 achieves the position switching function of the electric push rod 13 with extremely low cost and a simple structure, greatly facilitating the operator's replacement of the probe plate 24 and avoiding the cumbersome operation of disassembling the electric push rod 13 to replace the probe plate 24.

[0042] The pressing assembly 14 includes a pressure plate 1401 fixedly connected to the electric push rod 13. An extension tube 1402 is fixedly connected to the pressure plate 1401, and a slip ring 1403 is installed on the extension tube 1402. The slip ring 1403 is slidably connected to the electric push rod 13, and a mounting plate 1404 is provided on the slip ring 1403. The pressing assembly 14 serves as a force transmission and support component between the electric push rod 13, the second shielding shell 20, and the signal detector 21. Its structural design fully considers the different needs of testing and maintenance. The pressure plate 1401 is fixedly connected to the output end of the electric push rod 13 and is made of rubber. When the electric push rod 13 extends, the pressure plate 1401 directly contacts and presses down on the top of the second shielding shell 20. The rubber material has elasticity and a high coefficient of friction. On the one hand, it can buffer the impact force of the downward pressure, preventing damage to the second shield 20 or the first shield 15 due to rigid impact. On the other hand, the rubber material can increase the friction force on the contact surface with the second shield 20, preventing the second shield 20 from horizontal slippage under vibration. The extension tube 1402 is fixedly connected to the pressure plate 1401 and extends upward. The slip ring 1403 is slidably mounted on the body of the electric push rod 13 (i.e., the fixed part of the electric push rod 13). The mounting plate 1404 is fixedly connected to the slip ring 1403. When the output end of the electric push rod 13 extends downward, the pressure plate 1401 and the extension tube 1402 move downward accordingly. However, since the slip ring 1403 is slidably connected to the body of the electric push rod 13 and is not driven by the output end, the mounting plate 1404 remains stationary. This difference in movement increases the vertical distance between the mounting plate 1404 and the pressure plate 1401, and does not interfere with the downward pressure action. When the output end of the electric push rod 13 retracts upward, the pressure plate 1401 and the extension tube 1402 move upward. When the upper end of the extension tube 1402 contacts the slip ring 1403, the continued retraction will push the slip ring 1403 and the mounting plate 1404 upward as a whole through the extension tube 1402. This process plays an important role when changing the probe plate 24: after the signal detector 21 flips upward to open, the operator can control the electric push rod 13 to shorten, so that the mounting plate 1404 lifts the bottom of the signal detector 21, thereby keeping the signal detector 21 in the open state, freeing the operator's hands, and allowing them to focus on the operation of picking up and putting down the probe plate 24. In other words, the pressing component 14 integrates the functions of downward pressure testing and upward support in a simple mechanical linkage.

[0043] The pressure plate 1401, extension tube 1402, slip ring 1403 and mounting plate 1404 are fixedly connected as an integral structure, and the pressure plate 1401 is made of rubber.

[0044] The inner wall of opening 16 fits snugly against the outer wall of partition 4. Partition 4 has an inner groove 17 in the middle for docking with shielding plate 22. The first shielding shell 15 has an mounting groove 18 for docking with shielding plate 22. The fit between the inner wall of opening 16 and the outer wall of partition 4 ensures that the gap between partition 4 and opening 16 is minimal during testing. When the second shielding shell 20 descends, shielding plate 22 continues to move downwards through opening 16. If the gap between partition 4 and opening 16 is too large, a gap will exist between shielding plate 22 and partition 4, leading to a decrease in electromagnetic shielding effectiveness. In this embodiment, the snug fit design allows shielding plate 22 to form a tight contact with partition 4 after descent, maximizing the blocking of electromagnetic wave leakage paths. The inner groove 17 in the middle of partition 4 matches the shape and size of shielding plate 22. When shielding plate 22 descends to its position, the lower part of shielding plate 22 is embedded in the inner groove 17, further extending the shielding path and increasing electromagnetic wave attenuation. Meanwhile, the mounting groove 18 on the first shielding shell 15 is also used to mate with the shielding plate 22. Specifically, after the shielding plate 22 passes through the opening 16, its inner surface fits against the outer surface of the partition 4, while the lower end of the shielding plate 22 is simultaneously embedded in the inner groove 17 of the partition 4 and the mounting groove 18 of the first shielding shell 15, forming a triple shielding structure: the side wall of the first shielding shell 15, the shielding plate 22, and the partition 4 together form a closed space in which the other five sides, except for the conveying direction, are covered by a metal shielding layer. In addition, since the shielding plate 22 is detachably plugged into the inner groove 17 and the mounting groove 18, the operator can freely choose whether to activate the shielding function by controlling whether the second shielding shell 20 descends. When shielding is not required (e.g., for comparative testing to verify signal accuracy), the shielding plate 22 can be kept outside the inner groove 17 and mounting groove 18 simply by not activating the electric push rod 13 or by controlling it not to extend fully. At this time, the opening 16 of the first shielding shell 15 is open, and external electromagnetic signals can enter, thereby realizing comparative testing in both shielded and unshielded states, providing a convenient testing method for evaluating the anti-interference performance of the signal detector 21.

[0045] The support assembly 19 includes a first side plate 1901 fixedly connected to both sides of the first shielding shell 15. A guide rod 1902 and a second spring 1903 are fixedly connected to the first side plate 1901. A second side plate 1904 is slidably mounted on the outer side of the guide rod 1902, and the second side plate 1904 is fixedly connected to the second shielding shell 20. The support assembly 19 provides lifting guidance and automatic reset functions for the second shielding shell 20. The first side plate 1901 is fixedly connected to both sides of the first shielding shell 15, serving as the mounting base for the entire support assembly 19. The guide rod 1902 is fixedly connected to the first side plate 1901 and extends vertically. The second side plate 1904 is slidably mounted on the outer side of the guide rod 1902, and the second side plate 1904 is fixedly connected to the second shielding shell 20. When the electric push rod 13 presses down on the second shielding shell 20, the second side plate 1904 slides vertically downward along the guide rod 1902. The guide rod 1902 ensures that the second shielding shell 20 maintains a horizontal posture during the pressing process, without deflection or tilting. This ensures that the shielding plate 22 can be accurately aligned with the inner groove 17 and the mounting groove 18, and also ensures that the probe plate 24 can make precise contact with the test point of the circuit board under test. The second spring 1903 is sleeved on the guide rod 1902, with one end abutting or fixedly connected to the first side plate 1901, and the other end abutting against the second side plate 1904. When the second shielding shell 20 is pressed down, the second spring 1903 is compressed and stores elastic potential energy. When the driving force of the electric push rod 13 is removed, the second spring 1903 releases its elastic potential energy, pushing the second side plate 1904 to slide upward along the guide rod 1902, thereby causing the second shielding shell 20 to automatically return to the raised state. This automatic reset function allows the second shielding shell 20 to detach from the first shielding shell 15 after the test, making room for the continued operation of the conveyor belt 3 and the entry of the next product to be tested. Simultaneously, the second spring 1903 also acts as a buffer, absorbing impact energy in the final stage of the downward pressing action to prevent a rigid collision between the second shielding shell 20 and the first shielding shell 15. The support assembly 19, through the combination of guide rods and springs, achieves multiple functions for the second shielding shell 20, including precise guidance, smooth pressing, buffer protection, and automatic reset.

[0046] A support frame 23 is installed inside the second shielding shell 20, and the probe plate 24 is placed on the support frame 23. The support frame 23 installed inside the second shielding shell 20 constitutes the positioning and load-bearing structure of the probe plate 24. The support frame 23 is usually a rectangular frame structure, and its inner contour dimensions are adapted to the outer contour dimensions of the probe plate 24, so that the probe plate 24 can be placed precisely on the support frame 23 without excessive horizontal displacement. The advantage of this "floating placement" design, where the probe plate 24 is placed on the support frame 23 instead of being fixed by rigid fastening methods such as screws, is that when the second shielding shell 20 descends and the probe plate 24 comes into contact with the circuit board under test, if the contact pressure on the probe plate 24 is too high due to product dimensional tolerances or installation errors, the probe plate 24 can be lifted upward by the circuit board under test, producing a small displacement within the limitation range of the support frame 23. This prevents the probe from bending or being damaged due to overpressure, thus achieving overload protection. Meanwhile, this placement method greatly facilitates the replacement of the probe test board 24. Operators simply need to flip the signal detector 21 upwards to open it, directly remove the old probe test board 24 from the support frame 23, insert the new probe test board 24, and then flip the signal detector 21 back to its original position. No tools are required, and there is no need to disassemble or reassemble screws or connectors. The probe test board 24 and the signal detector 21 can be electrically connected using elastic contacts or flexible cables to accommodate slight fluctuations of the probe test board 24 under overload conditions. Furthermore, the support frame 23 can be designed as a replaceable structure according to different testing requirements, allowing the same testing device to be compatible with various models of probe test boards 24, thus ensuring compatibility with different specifications of circuit boards under test and improving the versatility and economy of the testing device.

[0047] As an optional implementation, the circuit board to be tested is placed between two adjacent partitions 4 on the conveyor belt 3, such as... Figure 2 , Figure 3 As shown, during the operation of the device, the circuit board to be tested is transported to the interior of the first shielding shell 15 via the conveyor belt 3. The conveyor belt 3 is supported by the rotating roller 6, which is connected to the drive shaft 5 via the connecting assembly 8. When the drive shaft 5 rotates, the support block 801, under the preload of the first spring 7, causes the locking block 803 to engage in the second groove 804 inside the rotating roller 6, thereby driving the rotating roller 6 to rotate synchronously and realize the conveying function. When the two adjacent partitions 4 are aligned with the openings 16 on both sides of the first shielding shell 15, the electric push rod 13 extends, causing the electric push rod 13 to press down on the second shielding shell 20 and the signal detector 21. After the second shielding shell 20 presses against the first shielding shell 15, the shielding plate 22 can press against the partitions 4, thereby increasing the running resistance of the conveyor belt 3.

[0048] At this time, the probe plate 24 below the signal detector 21 can contact the circuit board under test for signal detection. The first shielding shell 15, the second shielding shell 20, and the shielding plate 22 provide anti-interference function during the detection process. When the device needs to be replaced with a different probe plate 24, it is done by sliding the electric push rod 13.

[0049] like Figure 4 As shown, the signal detector 21 can be unfolded to remove and replace different probe plates 24 for use. When replacing, by shortening the electric push rod 13, the pressure plate 1401, extension tube 1402, slip ring 1403 and mounting plate 1404 move upward as a whole, thereby supporting the signal detector 21. The signal detector 21 can be supported by pressing the assembly 14, so that the probe plate 24 and the signal detector 21 can be easily installed.

[0050] like Figures 5-7 As shown, when the drive shaft 5 rotates, the locking block 803 on the drive shaft 5 abuts against the inner wall of the second groove 804 on the roller 6, thereby driving the roller 6 to rotate and thus realizing the conveying function. Since the resistance of the roller 6 increases when the device is in the detection state, the locking block 803 will be squeezed, thereby compressing the first spring 7 on the support block 801 until the drive shaft 5 slides on the roller 6 and the roller 6 stops rotating. This means that the device does not need complex drive equipment and can realize the detection function during continuous conveying without intermittent stops.

[0051] like Figure 3 As shown, when the second shielding shell 20 moves downward, the second side plates 1904 on both sides can move vertically downward under the guidance of the guide rod 1902, and the second spring 1903 is compressed so that the second shielding shell 20 can be reset later. After the second shielding shell 20 is pressed with the first shielding shell 15, the inner groove 17 and the mounting groove 18 can be connected with the shielding plate 22, so that the whole device can be tested while maintaining anti-interference. It can also be tested when the shielding plate 22 is not connected with the inner groove 17 and the mounting groove 18, so that the device can be tested without using the shielding function. By performing comparative testing, the signal accuracy test function can be realized.

[0052] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A BMS signal accuracy testing device resistant to environmental interference, characterized in that, include: Support base, drive shaft, first shielding shell, probe plate and electric push rod; The support base is provided with a housing, and a conveyor belt with spaced partitions is fitted on the outside of the housing; The drive shaft is flexibly connected to the rotating rollers in the conveyor belt via a connecting assembly, which allows the drive shaft to slide relative to the rotating rollers when the rotational resistance of the rotating rollers increases. The first shielding shell is fixed to one side of the outer shell, and support assemblies for supporting the second shielding shell are installed on both sides of the first shielding shell; shielding plates are fixed on both sides of the second shielding shell, and signal detectors are hinged to the shielding plates; the signal detectors are electrically connected to the probe plate inside the second shielding shell. The electric push rod is slidably mounted above the first shielding shell and is used to drive the second shielding shell to descend, so that the shielding plate and the partition plate form a shielding space for BMS signal accuracy testing.

2. The BMS signal accuracy testing device with anti-environmental interference as described in claim 1, characterized in that, The support base is also provided with a support frame, and a connecting frame is fixedly connected to the support frame; the electric push rod is slidably installed on the connecting frame.

3. The BMS signal accuracy testing device for resisting environmental interference as described in claim 2, characterized in that, The connecting frame has a movable groove, and a slider is slidably installed in the movable groove. The slider is fixedly connected to the electric push rod.

4. The BMS signal accuracy testing device with resistance to environmental interference as described in claim 1, characterized in that, The electric push rod is provided with a pressing assembly, which includes: a pressure plate, an extension tube disposed on the pressure plate, a slip ring disposed on the extension tube, and a mounting plate disposed on the slip ring; wherein, the slip ring is slidably connected to the electric push rod, and the pressure plate is made of rubber.

5. The BMS signal accuracy testing device for resisting environmental interference as described in claim 1, characterized in that, The connecting assembly includes a support block fixedly connected to a first spring, a first groove formed on the support block, and a locking block disposed in the first groove; wherein the first spring is installed inside the drive shaft.

6. The BMS signal accuracy testing device for resisting environmental interference as described in claim 5, characterized in that, The roller has a second groove for engaging with the locking block, and the locking block has a spherical structure.

7. The BMS signal accuracy testing device for resisting environmental interference as described in claim 1, characterized in that, The first shielding shell has openings on both sides, and the inner wall of the opening fits against the outer wall of the partition. Meanwhile, the partition has an inner groove in the middle for docking with the shielding plate, and the first shielding shell has an installation groove for docking with the shielding plate.

8. The BMS signal accuracy testing device for resisting environmental interference as described in claim 1, characterized in that, The support assembly includes: a first side plate fixedly connected to both sides of the first shielding shell, a guide rod and a second spring fixedly connected to the first side plate, and a second side plate slidably installed on the outside of the guide rod.

9. The BMS signal accuracy testing device for resisting environmental interference as described in claim 8, characterized in that, The second side plate is fixedly connected to the second shielding shell.

10. The BMS signal accuracy testing device for resisting environmental interference as described in claim 1, characterized in that, A support frame is installed inside the second shielding shell, and the probe plate is placed on the support frame.

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