A new energy vehicle high-voltage relay sticking detection device

Abstract

This invention provides a high-voltage relay adhesion detection device for new energy vehicles, relating to the field of high-voltage relay adhesion detection technology. It includes a storage box comprising a left frame and a right frame, with two sets of intermediate frames between them. The intermediate frames, left frame, and right frame are combined into a rectangular box. Three sets of mounting components are vertically stacked inside the storage box. The connection cables for a BMS diagnostic instrument, high-voltage testing equipment, and a multimeter are inserted into the bottom frame. The three sets of mounting components are vertically stacked and stored. The left frame, intermediate frame, and right frame of the storage box are combined to form a complete box structure, facilitating portability and movement. In use, the left and right frames are unfolded, and the three sets of mounting components are unfolded horizontally, placing the BMS diagnostic instrument, high-voltage testing equipment, and multimeter on the same plane for convenient operation and high-voltage relay testing, improving testing convenience and avoiding site clutter.

Description

Technical Field

[0001] This invention relates to the field of high-voltage relay adhesion detection technology, specifically a device for detecting adhesion of high-voltage relays in new energy vehicles. Background Technology

[0002] High-voltage relay sticking refers to a fault where the relay contacts, after receiving a disconnect command, cannot separate normally due to melting or welding, remaining in a conductive state. This is a typical high-risk silent fault in new energy high-voltage systems. Capacitive connection sticking: During closing, surge current causes repeated arcing, resulting in localized melting of the contacts, followed by cooling and direct sticking. Breaking sticking: During high-current disconnection, the arc melts the contacts, causing the contacts that should have disconnected to re-stick. Short-circuit sticking: High current in the circuit causes the contacts to heat up and melt, or electric repulsion forces push the contacts apart, generating an arc, ultimately leading to melting and sticking.

[0003] There are mature and practical methods for detecting adhesion in high-voltage relays for new energy systems. The specific operation and technical details are as follows: Voltage / current differential detection method. Compare the voltages at both ends of the relay. When normally disconnected, the voltage at both ends is close to the total voltage of the battery. If the voltage is close to 0V, adhesion is determined. The detection accuracy error is ≤±1%, the response speed is <10ms, the cost is low, and the anti-interference is moderate. It is the most commonly used basic solution in the industry.

[0004] Existing technologies for testing high-voltage relays require the use of high-precision multimeters, BMS diagnostic instruments, and insulation resistance testers, which need to be connected to the vehicle itself and the high-voltage relay. This process involves many connected devices, which can easily lead to a chaotic testing site and make subsequent data collection and organization inconvenient. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-voltage relay adhesion detection device for new energy vehicles to solve the problems mentioned in the background section. To achieve the above objectives, the present invention provides the following technical solution: A high-voltage relay adhesion detection device for new energy vehicles, comprising: a storage box, the storage box including a left side frame and a right side frame, with two sets of intermediate frames between the left side frame and the right side frame, the intermediate frames, the left side frame and the right side frame combined into a rectangular box, three sets of mounting components vertically stacked inside the storage box, detection components mounted on the surface of the mounting components, and a rotating component on the outer side of the middle set of the three mounting components; the mounting components include a bottom frame, the top of the bottom frame covered with a mounting plate, and a rotating shaft rotatably connecting the mounting plate and the bottom frame, with spring telescopic plates in the front, back, left, and right directions on the top of the mounting plate, and a locking block fixed to the extended end of the spring telescopic plate; the detection component includes a BMS diagnostic instrument, the BMS diagnostic instrument being mounted on the middle set of mounting components. On the mounting plate of the component, a high-voltage testing device is clamped and installed on the top of the mounting plate inside the left frame, and a multimeter is clamped and installed on the top of the mounting plate inside the right frame. The dedicated wiring harness of the BMS diagnostic instrument is inserted into the vehicle's OBD-II diagnostic interface. The multimeter is adjusted to a suitable DC voltage range, and the red and black probes are respectively connected to the input and output sampling points of the high-voltage relay to be tested. The high-voltage sampling circuit of the high-voltage testing device is connected in series to both ends of the relay. The low-voltage communication end of the high-voltage testing device establishes data interaction with the vehicle's VCU and BMS through the CAN / LIN bus to synchronously obtain vehicle control commands. The rotating component includes a bidirectional telescopic plate. The middle surface of the bidirectional telescopic plate is rotatably mounted on the bottom frame surface of the middle set of mounting components. The two extended ends of the bidirectional telescopic plate are rotatably connected to the bottom frame surfaces inside the left and right frames.

[0006] Furthermore, the mounting assembly also includes: screws and bevel gears. The mounting plate is rotatably mounted with screws at the positions corresponding to the bottom of the four spring telescopic plates. The bottom of the spring telescopic plates is threaded onto the surface of the screws. The mounting plate has a moving notch on the moving path of the spring telescopic plates. A bevel gear is fixed at one end of the four screws facing the center of the mounting plate, and the four bevel gears are meshed together. The mounting plate has four through slots equidistantly spaced on its surface.

[0007] Furthermore, storage slots are provided on the top of both sides of the bottom frame, and sliders are slidably connected inside the storage slots. A rotating rod is rotatably connected to the top of the slider, and the other end of the rotating rod is rotatably connected to the end of the mounting plate away from the rotating axis through a rotating shaft. A notch is provided at the end of the bottom frame away from the rotating axis, and a baffle is fixed at the position corresponding to the notch on the mounting plate.

[0008] Furthermore, the detection component also includes: a connecting wire, to which the output terminals of the BMS diagnostic instrument, high-voltage testing equipment, and multimeter are all connected, and the connecting wire passes through the through slot into the interior of the bottom frame. A first winding seat is rotatably connected to the bottom frame via a rotating shaft and a torsion spring. A second winding seat is rotatably connected between the two first winding seats via a rotating shaft and a torsion spring. The connecting wire passes through the first winding seat and the second winding seat respectively; wherein, a plug is fixed to one end of the connecting wire that extends out of the second winding seat.

[0009] Furthermore, a sliding frame is fixed to the inner walls on both sides of the bottom frame, and a slide bracket is slidably connected inside the sliding frame. The connecting line slides out of the slide bracket, and a plug is slidably inserted into the side of the slide bracket facing the middle of the bottom frame. The plug is slidably inserted into the slide bracket and a pressing plate is fixed inside the slide bracket. The pressing plate is in pressing contact with the connecting line. A second spring is fixed between the inside of the sliding frame and the slide bracket.

[0010] Furthermore, a slide rail is fixed at the bottom center of the base frame, a slide plate is slidably connected inside the slide rail, a stud is rotatably connected to the top of the slide plate, a threaded ring is threaded onto the surface of the stud, and a first connecting rod is rotatably connected to both sides of the threaded ring. The other end of the first connecting rod is rotatably connected to the insert rod through a rotating shaft. The top of the stud is rotatably connected to a second connecting rod, and the other end of the second connecting rod is rotatably connected to the mounting plate.

[0011] Furthermore, the rotating assembly also includes: a first sliding groove, a first connecting plate, a second sliding groove, and a second connecting plate. The second sliding groove is formed on the surface of the bottom frame away from the rotating shaft. Two second connecting plates are slidably connected inside the second sliding groove. The second connecting plates are fixedly connected to the middle frame. The bottom frame has two symmetrically formed first sliding grooves at the bottom of the rotating shaft, and the first connecting plates are slidably connected inside the first sliding grooves. The first connecting plates are fixedly connected to the middle frame. The two first sliding grooves are respectively set at the upper and lower ends of the bidirectional telescopic plate, and the positions of the first sliding grooves avoid the path of the bidirectional telescopic plate rotating from horizontal to vertical.

[0012] Furthermore, the rotating shaft has a sliding insert shaft inside, and the surface of the insert shaft has symmetrically fixed protrusions, which are slidably engaged inside the rotating shaft. The insert shaft has a slot at one end facing the right frame, and the other end of the insert shaft for mounting components inside the middle frame and the right frame is fixed with a second hexagonal block; wherein the second hexagonal block is inserted into the slot of the adjacent insert shaft.

[0013] Furthermore, the other end of the mounting shaft of the component inside the left frame is fixed with a post, and the surface of the left frame corresponding to the post is provided with a hole. The right frame is threaded with a bolt at the position corresponding to the mounting shaft, and the end of the bolt that passes through the right frame is fixed with a first hexagonal block. Rotating the bolt inserts the first hexagonal block into the mounting shaft and pushes the mounting shaft to move, so that the post is inserted into the hole.

[0014] Furthermore, symmetrical sliding rods are fixed inside the left and right frames, and a movable plate is slidably sleeved on the surface of the sliding rod. The movable plate is fixedly connected to the corresponding bottom frame. A first spring is sleeved on the surface of the sliding rod, and the other end of the first spring is fixedly connected to the movable plate. The bottom of the middle frame, right frame, and left frame is rotatably equipped with movable wheels.

[0015] The beneficial effects of this invention are: 1. The BMS diagnostic instrument, high-voltage testing equipment, and multimeter of this invention are placed on corresponding mounting plates. Rotating one end of the screw causes the four screws to rotate synchronously through the meshing of bevel gears. The spring telescopic plate engages with the screw threads to clamp the BMS diagnostic instrument, high-voltage testing equipment, and multimeter on all four sides. A locking block further limits the top of the BMS diagnostic instrument, high-voltage testing equipment, and multimeter, thus maintaining their stability after installation. They do not need to be removed from the mounting plate for testing. The installation and fixation can be adjusted according to the dimensions of the BMS diagnostic instrument, high-voltage testing equipment, and multimeter, and they can be uniformly stored inside a storage box.

[0016] 2. This invention maintains the connection between the middle set of mounting components and the middle frame through the connection of the first sliding groove and the first connecting plate, and the connection of the second sliding groove and the second connecting plate. Springs are installed inside the first and second sliding grooves. Due to the spring force, after the left and right frames are unfolded, the middle frame moves to both sides, exposing the mounting components. During merging, the left and right frames are pressed together to form a single unit. The connection of the first and second connecting plates with the middle plate and the bottom frame provides support and positioning for the middle set of mounting components. After the left and right frames are unfolded, the three sets of mounting components are on the same plane. At this time, the mounting components inside the right frame... The insert shaft corresponds to the bolt. Rotating the bolt causes it to insert into the slot of the insert shaft through the first hexagonal block, pushing the insert shaft to move. The second hexagonal block at the other end of the insert shaft inserts into the slot of another set of insert shafts. The three sets of mounting components are installed in the same way to connect the insert shafts. When the insert shaft of the mounting component in the left frame is squeezed, it drives the insert post to insert into the insertion hole. At this time, the insert shafts of the three sets of mounting components are interlocked and connected to the left and right frames through the insert post and bolt, maintaining stability when unfolded horizontally. The positions of the mounting components inside the left and right frames are locked, keeping the three sets of detection components on the same plane, which facilitates unified operation and observation and data recording.

[0017] 3. This invention rotates a bidirectional telescopic plate from the middle. The two extended ends of the bidirectional telescopic plate drive the installation components inside the left and right frames to rotate. Because the moving plate slides along the sliding rod, the installation components on both sides move upward and downward along the sliding rod, respectively. After being pushed by hand, they converge towards the middle, so that the left frame, the middle frame, and the right frame are merged into one. The three sets of installation components and detection components are stacked on top of each other for easy storage and unfolding.

[0018] 4. The insertion shaft of the present invention is engaged with the rotating shaft by a convex strip, so that the insertion shaft can still drive the rotating shaft to rotate by moving along the inside of the rotating shaft. Furthermore, by rotating the bolts and inserting the first hexagonal block and the second hexagonal block into the slot, the mounting plates of the three sets of mounting components can be rotated and opened simultaneously, changing from a horizontal position to an inclined position, which facilitates the testing operation.

[0019] 5. When the mounting plate covers the bottom frame, one end of the baffle seals the notch in the bottom frame, forming a closed bottom frame to protect the internal plug. Simultaneously, when the mounting plate rotates to open, the second connecting rod pulls the sliding plate along the slide rail, moving the plug towards the outside of the bottom frame. After moving to the notch position, the stud is rotated, and the threaded engagement between the stud and the threaded ring, through the first connecting rod, drives the insertion rod into the carriage, releasing the locking of the connecting wire by the compression plate. This allows for easy manual pulling of the plug and connecting wire to unwind to an appropriate length for connection to the vehicle and high-voltage relay. After connection, the carriage and connecting wire are locked again to maintain stability. After testing, the connecting wire is retracted by the torsion spring force of the second rewind seat. After the mounting plate covers the bottom frame, the carriage slides along the slide frame, retracting the plug into the bottom frame for easy reuse. Automatic rewinding also prevents the connecting wire from becoming tangled. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 2 This is a schematic diagram of the separation of the storage box in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 3 This is a schematic diagram of the connection between the mounting components and the left side frame in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 4 This is a schematic diagram of the connection between the right frame and the rotating shaft in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 5 This is a schematic diagram of the front connection between the middle frame and the mounting components of a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 6 This is a schematic diagram showing the connection between the middle frame and the back of the mounting assembly of a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 7 This is a schematic diagram of the detection component structure in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 8 This is a schematic diagram of the surface structure of the mounting plate in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 9 This is a schematic diagram of the connection between the connecting wire and the slide in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 10 This is a schematic diagram of the connection between the slide and the sliding plate in a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; Figure 11 This is a schematic diagram of the internal structure of the bottom frame of a high-voltage relay adhesion detection device for new energy vehicles according to an embodiment of this disclosure; As shown in the figure: 1. Storage box; 11. Right side frame; 12. Middle frame; 13. Left side frame; 14. Casters; 15. Sliding rod; 16. Moving plate; 17. Insertion hole; 18. First spring; 19. Bolt; 110. First hexagonal block; 2. Mounting components; 21. Base frame; 22. Mounting plate; 23. Rotating shaft; 24. Insert shaft; 25. Insert post; 26. Slot; 27. Protrusion; 28. Second hexagonal block; 29. ​​Through slot; 210. Screw; 211. Bevel gear; 212. Spring telescopic plate; 213. Locking block; 214. First take-up seat; 215. Second take-up seat; 216. Storage slot; 217. Slider; 218. Rotating rod; 219. Slide frame; 220. Slide carriage; 221. Slide rail; 222. Slide plate; 223. Extrusion plate; 224. Insert rod; 225. Screw; 226. Threaded ring; 227. First connecting rod; 228. Second spring; 229. Second connecting rod; 230. Baffle; 3. Rotating assembly; 31. Bidirectional telescopic plate; 32. First slide rail; 33. First connecting plate; 34. Second slide rail; 35. Second connecting plate; 4. Testing components; 41. BMS diagnostic instrument; 42. High voltage testing equipment; 43. Multimeter; 44. Plug; 45. Connecting cable. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8As shown in the figure, this disclosure proposes a high-voltage relay adhesion detection device for new energy vehicles, including: a storage box 1, the storage box 1 including a left frame 13 and a right frame 11, two sets of intermediate frames 12 provided between the left frame 13 and the right frame 11, the intermediate frames 12, the left frame 13 and the right frame 11 combined into a rectangular box, three sets of mounting components 2 vertically stacked inside the storage box 1, detection components 4 mounted on the surface of the mounting components 2, and a rotating component 3 provided on the outer side of the middle set of the three sets of mounting components 2; the mounting components 2 include a bottom frame 21, the top of the bottom frame 21 is covered by a mounting plate 22, and the mounting plate 22 is connected to the bottom frame 21. A rotating shaft 23 is rotatably connected to the mounting plate 22. Spring telescopic plates 212 are provided on the top of the mounting plate 22 in four directions (front, back, left, and right), and the extended ends of the spring telescopic plates 212 are fixed with locking blocks 213. The detection assembly 4 includes a BMS diagnostic instrument 41, which is mounted on the mounting plate 22 of the middle set of mounting assemblies 2. A high-voltage testing device 42 is clamped and installed on the top of the mounting plate 22 inside the left frame 13, and a multimeter 43 is clamped and installed on the top of the mounting plate 22 inside the right frame 11. The dedicated wiring harness of the BMS diagnostic instrument 41 is inserted into the vehicle's OBD-II diagnostic interface. The multimeter 43 is adjusted to a suitable DC voltage range, and the red and black probes are respectively connected to... The sampling points at the input and output terminals of the high-voltage relay to be tested should be connected. The high-voltage sampling circuit of the high-voltage testing device 42 is connected in series to both ends of the relay. The low-voltage communication terminal of the high-voltage testing device 42 establishes data interaction with the vehicle VCU and BMS through the CAN / LIN bus to synchronously obtain vehicle control commands. The rotating assembly 3 includes a bidirectional telescopic plate 31. The middle surface of the bidirectional telescopic plate 31 is rotatably mounted on the surface of the bottom frame 21 of the middle set of mounting assemblies 2. The two extended ends of the bidirectional telescopic plate 31 are rotatably connected to the surfaces of the bottom frame 21 inside the left side frame 13 and the right side frame 11. When using the device, the BMS diagnostic instrument 41 and the high-voltage testing device 42 are connected together. The multimeter 43 is installed on the mounting plate 22 of the three sets of mounting components 2. The connecting wires 45 of the BMS diagnostic instrument 41, high voltage testing equipment 42 and multimeter 43 are inserted into the bottom frame 21. The three sets of mounting components 2 are stacked vertically and stored together. The left frame 13, middle frame 12 and right frame 11 of the storage box 1 are combined to form a complete box structure, which is convenient to carry and move. When in use, the left frame 13 and right frame 11 are unfolded and the three sets of mounting components 2 are unfolded into a horizontal shape. The BMS diagnostic instrument 41, high voltage testing equipment 42 and multimeter 43 are on the same plane, which is convenient for operation and testing of high voltage relays, improves the convenience of testing and avoids the chaos at the testing site. Among them, high-voltage testing equipment 42 is an insulation resistance tester; To connect the BMS diagnostic tool 41, locate the vehicle's OBD-II diagnostic interface, typically located in the dashboard area below the driver's seat. Insert the dedicated wiring harness provided with the diagnostic tool into the interface. Connect the vehicle's low-voltage 12V power supply. In the diagnostic tool system, select the BMS control unit corresponding to the vehicle model and complete the communication handshake to establish a connection. Some specialized devices can directly interface with the BMS's CAN bus port to read core data such as relay drive commands and voltage sampling.

[0023] The multimeter 43 connection method is to confirm that the vehicle is completely powered off, the high-voltage busbar has been discharged, and that qualified insulation protective equipment is worn.

[0024] Set the multimeter 43 to the appropriate DC voltage range. Connect the red and black probes to the input and output sampling points of the high-voltage relay being tested, respectively. In some scenarios, it is necessary to connect the probes to two reserved voltage observation points at the AD pre-charge end and the BC main negative end to assist in completing the status determination.

[0025] The professional high-voltage testing equipment (42 connection method) involves disconnecting the external load harness of the high-voltage distribution box and connecting the high-voltage sampling circuit of the testing equipment in series across the relay. The equipment's low-voltage communication terminal establishes data interaction with the vehicle's VCU and BMS via a CAN / LIN bus, synchronously acquiring vehicle control commands. Ensure all connectors are properly locked and insulation testing is completed before starting the equipment to prevent arcing due to loose connections in the high-voltage circuit.

[0026] The specific testing steps are as follows: First, ensure the vehicle is completely powered off, disconnect the negative terminal of the 12V low-voltage battery, and wear high-voltage protective gloves with an insulation level ≥1000V. Prepare a high-precision multimeter (43), a BMS diagnostic tool (41), and an insulation resistance tester, ensuring the equipment is within its calibration validity period. When the vehicle is powered on, the BMS automatically disconnects the first relay and closes the second relay, collecting voltage data from both the battery and controller terminals. Compare the two voltages to complete the initial judgment. If the preset switching conditions are met, switch the relay's on / off state and collect the third and fourth voltages for secondary verification. Combine the hard-wired SW / DI auxiliary contact signal to confirm the actual physical state of the relay and output the final adhesion judgment result. Send a disconnect command to the target relay through the diagnostic tool, waiting 15-20ms to avoid the mechanical action window. Simultaneously collect the voltage values ​​of the relay's input terminal BAT+ and output terminal HV* using a multimeter (43), and calculate the difference. If the voltage difference is ≤0.5V, or the load terminal voltage drop is less than 10% within 5 seconds after the disconnect command is issued, the relay can be determined to be adhered. Further check the hard-wired signals of the auxiliary contacts. If the relay is in the open state but the SW signal is on and the DI signal is high, the adhesion fault can be further confirmed.

[0027] like Figure 7 and Figure 8As shown, in some embodiments, the mounting assembly 2 further includes: screws 210 and bevel gears 211. The mounting plate 22 is rotatably mounted with screws 210 at the bottom positions of the four spring telescopic plates 212. The bottom of the spring telescopic plates 212 is threaded onto the surface of the screws 210. The mounting plate 22 has a moving notch on the moving path of the spring telescopic plates 212. Bevel gears 211 are fixed at one end of the four screws 210 facing the center of the mounting plate 22, and the four bevel gears 211 are meshed together. The mounting plate 22 has four through slots 29 equidistantly provided on its surface.

[0028] Understandably, the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 are placed on their respective mounting plates 22. Rotating one end of the screw 210 causes the four screws 210 to rotate synchronously through the meshing of the bevel gears 211. The spring telescopic plate 212 engages with the screws 210 and clamps them on the four sides of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43. The locking block 213 limits the top of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43, thus maintaining the stability of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 after installation. They do not need to be removed from the mounting plate 22 for testing. They can be adjusted and fixed according to their dimensions and stored uniformly inside the storage box 1.

[0029] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in some embodiments, the rotating assembly 3 further includes: a first sliding groove 32, a first connecting plate 33, a second sliding groove 34, and a second connecting plate 35. A second sliding groove 34 is formed on the surface of the bottom frame 21 at the end away from the rotating shaft 23. Two second connecting plates 35 are slidably connected inside the second sliding groove 34. The second connecting plates 35 are fixedly connected to the middle frame 12. Two first sliding grooves 32 are symmetrically formed at the bottom of the bottom frame 21 near the rotating shaft 23, and a first connecting plate 33 is slidably connected inside the first sliding groove 32. The first connecting plate 33 is fixedly connected to the middle frame 12. The two first sliding grooves 32 are respectively located at the upper and lower ends of the bidirectional telescopic plate 31. The position of the first sliding grooves 32 avoids the path of the bidirectional telescopic plate 31 rotating from horizontal to vertical. A shaft is slidably inserted inside the rotating shaft 23. 24. Symmetrically fixed protrusions 27 are provided on the surface of the insertion shaft 24, and the protrusions 27 are slidably engaged inside the rotating shaft 23. Slots 26 are provided at one end of the insertion shaft 24 facing the right frame 11. The other end of the insertion shaft 24 of the assembly 2 installed inside the middle frame 12 and the right frame 11 is fixed with a second hexagonal block 28. The second hexagonal block 28 is inserted into the slot 26 of the adjacent insertion shaft 24. Sliding rods 15 are symmetrically fixed inside the left frame 13 and the right frame 11. A moving plate 16 is slidably sleeved on the surface of the sliding rod 15. The moving plate 16 is fixedly connected to the corresponding bottom frame 21. A first spring 18 is sleeved on the surface of the sliding rod 15, and the other end of the first spring 18 is fixedly connected to the moving plate 16. Moving wheels 14 are rotatably installed at the bottom of the middle frame 12, the right frame 11 and the left frame 13.

[0030] It is understandable that by rotating the bidirectional telescopic plate 31 from the middle, the two extended ends of the bidirectional telescopic plate 31 drive the mounting components 2 inside the left frame 13 and the right frame 11 to rotate. Because the moving plate 16 slides and is limited along the slide rod 15, the mounting components 2 on both sides move upward and downward along the slide rod 15 respectively, and then converge towards the middle after being pushed by hand. Thus, the left frame 13, the middle frame 12, and the right frame 11 are merged into one unit, and the three sets of mounting components 2 and the detection components 4 are stacked on top of each other for easy storage and unfolding. The middle set of mounting components 2 is connected to the first connecting plate 33 through the first sliding groove 32. The connection between the second slide 34 and the second connecting plate 35 maintains the connection with the middle frame 12. Springs are installed inside the first slide 32 and the second slide 34. Through the spring force, after the left side frame 13 and the right side frame 11 are unfolded, the middle frame 12 moves to both sides, exposing the mounting components 2. During merging, the left side frame 13 and the right side frame 11 are pressed together to form a single unit. The connection between the first connecting plate 33 and the second connecting plate 35 and the middle plate and the bottom frame 21 provides support and positioning for the middle set of mounting components 2. After the left side frame 13 and the right side frame 11 are unfolded, the three sets of mounting components 2 are on the same plane. At this time, the insertion shaft 24 of the mounting component 2 in the right frame 11 corresponds to the bolt 19. Rotating the bolt 19 causes it to insert into the slot 26 of the insertion shaft 24 via the first hexagonal block 110, pushing the insertion shaft 24 to move. The second hexagonal block 28 at the other end of the insertion shaft 24 inserts into the slot 26 of another set of insertion shafts 24. The three sets of mounting components 2 are connected in the same way. Furthermore, when the insertion shaft 24 of the mounting component 2 in the left frame 13 is compressed, it causes the insertion post 25 to insert into the insertion hole 17. At this time, the insertion shafts 24 of the three sets of mounting components 2 are interlocked and connected to the left frame 13 via the insertion post 25 and the bolt 19. The right frame 11 is connected to maintain stability when unfolded in a horizontal state. The positions of the mounting components 2 inside the left frame 13 and the right frame 11 are locked to keep the three sets of detection components 4 on the same plane, which facilitates unified operation and observation and recording of data. The insertion shaft 24 is engaged with the rotating shaft 23 through the protrusion 27. Thus, the insertion shaft 24 can still drive the rotating shaft 23 to rotate by moving along the inside of the rotating shaft 23. Then, through the rotation of the bolt 19 and the insertion of the first hexagonal block 110 and the second hexagonal block 28 into the slot 26, the mounting plates 22 of the three sets of mounting components 2 can be rotated and opened at the same time, changing from a horizontal position to an inclined position, which facilitates detection operation.

[0031] like Figure 7 , Figure 9 , Figure 10 and Figure 11As shown, in some embodiments, the detection component 4 further includes a connecting wire 45. The output terminals of the BMS diagnostic instrument 41, the high-voltage testing device 42, and the multimeter 43 are all connected to the connecting wire 45. The connecting wire 45 passes through the through slot 29 into the bottom frame 21. A first winding seat 214 is rotatably connected inside the bottom frame 21 via a rotating shaft and a torsion spring. A second winding seat 215 is rotatably connected between the two first winding seats 214 via a rotating shaft and a torsion spring. The connecting wire 45 passes through the first winding seat 214 and the second winding seat 215 respectively. A winding seat 215; wherein, one end of the connecting wire 45 passing through the second winding seat 215 is fixed with a plug 44, and sliding frames 219 are fixed on the inner walls of both sides of the bottom frame 21. A slide frame 220 is slidably connected inside the sliding frame 219, and the connecting wire 45 slidably passes through the slide frame 220. A plug rod 224 is slidably inserted into the side of the slide frame 220 facing the middle of the bottom frame 21, and the plug rod 224 slidably passes into the slide frame 220 and a pressing plate 223 is fixed inside. The pressing plate 223 is in pressing contact with the connecting wire 45; wherein, the sliding... A second spring 228 is fixed between the inside of frame 219 and slide 220. Storage slots 216 are provided on the top of both sides of the bottom frame 21. A slider 217 is slidably connected inside the storage slot 216. A rotating rod 218 is rotatably connected to the top of the slider 217, and the other end of the rotating rod 218 is rotatably connected to the end of the mounting plate 22 away from the rotating shaft 23 via a rotating shaft. A notch is provided at the end of the bottom frame 21 away from the rotating shaft 23, and a baffle 230 is fixed to the mounting plate 22 at the position corresponding to the notch. A slide rail 221 is fixed at the bottom center of the slide rail 221. A slide plate 222 is slidably connected inside the slide rail 221. A stud 225 is rotatably connected to the top of the slide plate 222. A threaded ring 226 is threaded onto the surface of the stud 225. A first connecting rod 227 is rotatably connected to both sides of the threaded ring 226. The other end of the first connecting rod 227 is rotatably connected to the insert rod 224 through a rotating shaft. A second connecting rod 229 is rotatably connected to the top of the stud 225, and the other end of the second connecting rod 229 is rotatably connected to the mounting plate 22.

[0032] It should be noted that the connecting cable 45 of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 bypasses the first take-up holder 214 and the second take-up holder 215. The reserved length inside the first take-up holder 214 is to ensure that the connecting cable 45 remains connected to the instrument after the mounting plate 22 rotates. The length inside the second take-up holder 215 is to allow the connecting cable 45 to be pulled out during testing to connect to the vehicle itself and the high-voltage relay. One end of the plug 44 of the connecting cable 45 passes through the arc frame. When the mounting plate 22 covers the bottom frame 21, one end of the baffle 230 seals the gap in the bottom frame 21, forming a closed bottom frame 21 to protect the internal plug 44. At the same time, when the mounting plate 22 rotates and opens, the second connecting rod 229 pulls the slide plate 222 to slide along the slide rail 221. Move the plug 44 outwards towards the bottom frame 21. After moving it to the notch position, rotate the stud 225. The threaded engagement between the screw ring 226 and the stud 225 drives the insertion rod 224 through the first connecting rod 227 into the carriage 220, releasing the locking of the compression plate 223 on the connecting wire 45. This allows for manual pulling of the plug 44 and connecting wire 45 to unwind to an appropriate length for connection with the vehicle and high-voltage relay. After connection, lock the carriage 220 and connecting wire 45 again to maintain stability after connection. After testing, the connecting wire 45 is retracted by the torsion spring force of the second rewind seat 215. After the mounting plate 22 covers the bottom frame 21, the carriage 220 slides along the slide frame 219, retracting the plug 44 into the bottom frame 21 for easy next use. At the same time, automatic rewinding prevents the connecting wire 45 from becoming tangled.

[0033] Working principle: When using the device, install the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 on the mounting plate 22 of the three sets of mounting components 2. Place the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 on their respective mounting plates 22. Rotate one end of the screw 210, and through the meshing of the bevel gears 211 of the four screws 210, the four screws 210 rotate synchronously. The spring telescopic plate 212 engages with the screws 210 and clamps them on the four sides of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43. The locking block 213 limits the top of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43, thereby maintaining the stability of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 after installation. For qualitative testing, it is not necessary to remove it from the mounting plate 22. It can be adjusted and fixed according to the dimensions of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43, and stored uniformly inside the storage box 1. The connecting cables 45 of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 are inserted into the bottom frame 21. The connecting cables 45 of the BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 bypass the first winding seat 214 and the second winding seat 215. The first winding seat 214 has a reserved winding length to ensure the connection between the connecting cable 45 and the instrument after the mounting plate 22 rotates. The second winding seat 215 has a winding length to pull the connecting cable 45 out during testing to connect it to the vehicle body and... During the high-voltage relay connection test, one end of the plug 44 of the connecting wire 45 passes through the arc frame. When the mounting plate 22 covers the bottom frame 21, one end of the baffle 230 seals the notch in the bottom frame 21, forming a closed bottom frame 21 to protect the internal plug 44. Simultaneously, when the mounting plate 22 is rotated open, the second connecting rod 229 pulls the slide plate 222 to slide along the slide rail 221, moving the plug 44 towards the outside of the bottom frame 21. After moving to the notch position, the stud 225 is rotated, and the threaded engagement between the threaded ring 226 and the stud 225 drives the insertion rod 224 to pass into the slide 220 through the first connecting rod 227. This releases the locking of the compression plate 223 on the connecting wire 45, making it convenient for manual pulling of the plug 44 and the connecting wire 45 to unwind to an appropriate length for connection with the vehicle and the high-voltage relay. After connection, the slide 220 is locked to the connecting cable 45 again to maintain stability. After testing, the connecting cable 45 is retracted by the torsion spring force of the second retractor 215. After the mounting plate 22 covers the bottom frame 21, the slide 220 slides along the slide frame 219 to retract the plug 44 into the bottom frame 21 for easy use next time. At the same time, automatic rewinding prevents the connecting cable 45 from becoming tangled. The three sets of mounting components 2 are stacked vertically and stored together. The left frame 13, middle frame 12 and right frame 11 of the storage box 1 are combined to form a complete box structure for easy carrying and movement. When in use, the left frame 13 and right frame 11 are unfolded, and the three sets of mounting components 2 are unfolded into a horizontal shape. The bidirectional telescopic plate 31 is rotated from the middle.The two extended ends of the bidirectional telescopic plate 31 drive the mounting components 2 inside the left frame 13 and the right frame 11 to rotate. Because the moving plate 16 slides and is limited along the slide rod 15, the mounting components 2 on both sides move upward and downward along the slide rod 15 respectively, and converge towards the middle after being pushed by hand. Thus, the left frame 13, the middle frame 12, and the right frame 11 are merged into one unit. The three sets of mounting components 2 and the detection components 4 are stacked on top of each other for easy storage and unfolding. The middle set of mounting components 2 is connected to the first connecting plate 33 through the first sliding groove 32 and to the second connecting plate 35 through the second sliding groove 34, while maintaining connection with the middle frame 12. Springs are installed inside the first slide groove 32 and the second slide groove 34. Due to the spring force, after the left side frame 13 and the right side frame 11 are unfolded, the middle frame 12 moves to both sides, exposing the mounting components 2. During merging, the left side frame 13 and the right side frame 11 are pressed together to form a single unit. The connection between the first connecting plate 33 and the second connecting plate 35 and the middle plate and bottom frame 21 provides support and positioning for the middle set of mounting components 2. After the left side frame 13 and the right side frame 11 are unfolded, the three sets of mounting components 2 are on the same plane. At this time, the insertion shaft 24 of the mounting component 2 inside the right side frame 11 corresponds to the bolt 19. Rotating the bolt 19 causes the bolt 19 to pass through the first hexagonal... Block 110 is inserted into the slot 26 of the insert shaft 24, pushing the insert shaft 24 to move. The second hexagonal block 28 at the other end of the insert shaft 24 is inserted into the slot 26 of another set of insert shafts 24. The three sets of mounting components 2 are installed in the same way to connect the insert shafts 24. When the insert shaft 24 of the mounting component 2 in the left frame 13 is squeezed, it drives the insert post 25 to be inserted into the insertion hole 17. At this time, the insert shafts 24 of the three sets of mounting components 2 are interlocked and connected to the left frame 13 and the right frame 11 through the insert post 25 and bolt 19, maintaining stability in the unfolded horizontal state, locking the position of the mounting components 2 inside the left frame 13 and the right frame 11, and maintaining the three sets of detection Component 4 is positioned on a single plane, facilitating unified operation and data observation and recording. The insertion shaft 24 engages with the rotating shaft 23 via a protrusion 27, allowing the insertion shaft 24 to move along the interior of the rotating shaft 23 while still driving the rotating shaft 23 to rotate. This is further facilitated by the rotation via bolt 19 and the insertion of the first hexagonal block 110 and the second hexagonal block 28 into the slot 26. The mounting plates 22 of the three sets of mounting components 2 can be simultaneously rotated and opened, changing from a horizontal to an inclined position, facilitating testing operations. The BMS diagnostic instrument 41, high-voltage testing equipment 42, and multimeter 43 are all on the same plane, facilitating operation and testing of high-voltage relays, improving testing convenience, and avoiding chaos at the testing site.

[0034] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting adhesion of high-voltage relays in new energy vehicles, characterized in that, include: Storage box (1), the storage box (1) includes a left side frame (13) and a right side frame (11), two sets of middle frames (12) are provided between the left side frame (13) and the right side frame (11), the middle frames (12), the left side frame (13) and the right side frame (11) are combined into a rectangular box, and three sets of mounting components (2) are vertically stacked inside the storage box (1), and a detection component (4) is installed on the surface of the mounting components (2), and a rotating component (3) is provided on the outer side of the middle set of the three sets of mounting components (2); The mounting assembly (2) includes a base frame (21), the top of which is covered by a mounting plate (22), and a rotating shaft (23) is rotatably connected between the mounting plate (22) and the base frame (21). The mounting plate (22) has spring telescopic plates (212) in the four directions of front, back, left and right on the top of the mounting plate (22), and a locking block (213) is fixed to the extended end of the spring telescopic plate (212). The detection component (4) includes a BMS diagnostic instrument (41), which is mounted on the mounting plate (22) of the middle set of mounting components (2). A high voltage testing device (42) is clamped and mounted on the top of the mounting plate (22) inside the left frame (13), and a multimeter (43) is clamped and mounted on the top of the mounting plate (22) inside the right frame (11). The BMS diagnostic instrument (41) is inserted into the vehicle's OBD-II diagnostic interface. The multimeter (43) is adjusted to a suitable DC voltage range. The red and black probes are connected to the input and output sampling points of the high-voltage relay to be tested, respectively. The high-voltage sampling circuit of the high-voltage testing device (42) is connected in series to both ends of the relay. The low-voltage communication end of the high-voltage testing device (42) establishes data interaction with the vehicle's VCU and BMS through the CAN / LIN bus and synchronously obtains the vehicle control commands. The rotating assembly (3) includes a bidirectional telescopic plate (31), the middle surface of which is rotatably mounted on the bottom frame (21) surface of the middle set of mounting assemblies (2), and the two extended ends of the bidirectional telescopic plate (31) are rotatably connected to the bottom frame (21) surface inside the left side frame (13) and the right side frame (11).

2. The new energy vehicle high-voltage relay adhesion detection device according to claim 1, characterized in that, The installation component (2) also includes: The mounting plate (22) is rotatably mounted with screws (210) and bevel gears (211) at the bottom positions of the four spring telescopic plates (212). The bottom threads of the spring telescopic plates (212) are threaded onto the surface of the screws (210). The mounting plate (22) has a moving notch on the moving path of the spring telescopic plates (212). One end of the four screws (210) facing the center of the mounting plate (22) is fixed with a bevel gear (211), and the four bevel gears (211) are meshed together. The mounting plate (22) has four through slots (29) evenly spaced on its surface.

3. The new energy vehicle high-voltage relay adhesion detection device according to claim 2, characterized in that, The bottom frame (21) has storage slots (216) on the top of both sides. A slider (217) is slidably connected inside the storage slot (216). A rotating rod (218) is rotatably connected to the top of the slider (217), and the other end of the rotating rod (218) is rotatably connected to the end of the mounting plate (22) away from the rotating shaft (23) through a rotating shaft. The bottom frame (21) has a notch at one end away from the rotation axis (23), and the mounting plate (22) has a baffle (230) fixed at the position corresponding to the notch.

4. The new energy vehicle high-voltage relay adhesion detection device according to claim 3, characterized in that, The detection component (4) also includes: The output terminals of the BMS diagnostic instrument (41), high voltage testing equipment (42) and multimeter (43) are all connected to the connecting wire (45), and the connecting wire (45) passes through the through slot (29) into the bottom frame (21). The bottom frame (21) is rotatably connected to the first winding seat (214) through a rotating shaft and a torsion spring. The two first winding seats (214) are rotatably connected to the second winding seat (215) through a rotating shaft and a torsion spring. The connecting wire (45) passes through the first winding seat (214) and the second winding seat (215) respectively. The connector (44) is fixed at one end of the connecting wire (45) that passes through the second take-up seat (215).

5. The new energy vehicle high-voltage relay adhesion detection device according to claim 4, characterized in that, The inner walls of both sides of the bottom frame (21) are fixed with sliding frames (219), and a slide frame (220) is slidably connected inside the sliding frame (219). The connecting line (45) slides out of the slide frame (220). A plug rod (224) is slidably inserted into the side of the slide frame (220) facing the middle position of the bottom frame (21), and the plug rod (224) slides into the slide frame (220) and a pressing plate (223) is fixed inside. The pressing plate (223) is pressed and contacted with the connecting line (45). A second spring (228) is fixed between the inside of the slide frame (219) and the slide bracket (220).

6. The new energy vehicle high-voltage relay adhesion detection device according to claim 5, characterized in that, The bottom frame (21) is fixed with a slide rail (221) in the middle bottom. The slide rail (221) is slidably connected with a slide plate (222). The top of the slide plate (222) is rotatably connected with a stud (225). A threaded ring (226) is threaded onto the surface of the stud (225). The two sides of the threaded ring (226) are rotatably connected with a first connecting rod (227). The other end of the first connecting rod (227) is rotatably connected to the insert rod (224) through a rotating shaft. The top of the stud (225) is rotatably connected to a second connecting rod (229), and the other end of the second connecting rod (229) is rotatably connected to the mounting plate (22).

7. The new energy vehicle high-voltage relay adhesion detection device according to claim 6, characterized in that, The rotating assembly (3) further includes: The first slide groove (32), the first connecting plate (33), the second slide groove (34), and the second connecting plate (35) are provided on the surface of the bottom frame (21) away from the rotating shaft (23). The second slide groove (34) is slidably connected to two second connecting plates (35) inside the second slide groove (34). The second connecting plate (35) is fixedly connected to the middle frame (12). The bottom frame (21) is located at the bottom of the rotating shaft (23) and has two first slide grooves (32) symmetrically provided. The first slide groove (32) is slidably connected to the first connecting plate (33) inside the first slide groove (32). The first connecting plate (33) is fixedly connected to the middle frame (12). The two first slide grooves (32) are respectively set at the upper and lower ends of the bidirectional telescopic plate (31), and the positions of the first slide grooves (32) avoid the path of the bidirectional telescopic plate (31) rotating from horizontal to vertical.

8. The new energy vehicle high-voltage relay adhesion detection device according to claim 7, characterized in that, The rotating shaft (23) has a sliding insert shaft (24) inside. The insert shaft (24) has symmetrically fixed protrusions (27) on its surface, and the protrusions (27) are slidably engaged inside the rotating shaft (23). The insert shaft (24) has a slot (26) at one end facing the right frame (11). The other end of the insert shaft (24) of the mounting component (2) inside the middle frame (12) and the right frame (11) is fixed with a second hexagonal block (28). The second hexagonal block (28) is inserted into the slot (26) of the adjacent insert shaft (24).

9. The new energy vehicle high-voltage relay adhesion detection device according to claim 8, characterized in that, The other end of the insertion shaft (24) of the mounting component (2) inside the left frame (13) is fixed with a post (25). The left frame (13) has a hole (17) on the surface corresponding to the post (25). The right frame (11) is threaded with a bolt (19) at the position corresponding to the insertion shaft (24). The bolt (19) is fixed with a first hexagonal block (110) at one end of the right frame (11). Rotating the bolt (19) inserts the first hexagonal block (110) into the insert shaft (24) and pushes the insert shaft (24) to move, so that the insert post (25) is inserted into the insert hole (17).

10. The new energy vehicle high-voltage relay adhesion detection device according to claim 9, characterized in that: The left side frame (13) and the right side frame (11) are symmetrically fixed with sliding rods (15). A movable plate (16) is slidably sleeved on the surface of the sliding rod (15). The movable plate (16) is fixedly connected to the corresponding bottom frame (21). A first spring (18) is sleeved on the surface of the sliding rod (15), and the other end of the first spring (18) is fixedly connected to the movable plate (16). Among them, the bottom of the middle frame (12), the right frame (11) and the left frame (13) are rotatably mounted with moving wheels (14).

Images