Battery pressure detection device

Abstract

The present invention belongs to the field of battery pressure detection technology, and in particular, a battery pressure detection device, including a pressure detection box, wherein a point-surface switching mechanism is provided on the outer wall of one side of the pressure detection box, a hydraulic push rod is fixedly connected to the outer wall of one end of the point-surface switching mechanism via a flange, and the piston rod of the hydraulic push rod is fixedly connected to a pressure sensor via a bolt, a threaded sleeve is welded to the outer wall of one side of the pressure sensor, and a needle is screwed to the inner wall of the threaded sleeve, and a protrusion is provided on the outer wall of one end of the needle. The present invention realizes rapid switching between single-point detection and plane detection through mechanical linkage between the point-surface switching mechanism and the hydraulic push rod, pressure sensor, needle, protrusion and pressure plate. The point-surface switching is efficient and flexible, meeting the needs of multiple detection. On this basis, the water baffle is driven by the pressure sensor, and the water baffle can be linked to control the flow, realizing seamless connection of "detection and protection", and the overall function has the characteristics of integrated detection and fire extinguishing.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pressure detection, and in particular to a battery pressure detection device. Background Art

[0002] As the core energy carrier of modern society, batteries are widely used in consumer electronics, new energy vehicles, energy storage systems and other fields. Battery pressure testing is a technical process that quantitatively analyzes the internal or surface pressure of the battery through physical contact or non-contact methods.

[0003] During battery production, pressure monitoring can reveal key process parameters such as cell packing density and electrolyte injection volume. During battery operation, abnormal pressure often signals potential safety hazards such as thermal runaway and internal short circuits. For example, when a lithium-ion battery is overcharged or over-discharged, internal gas production causes a sudden increase in pressure. If not detected promptly, this can lead to fire or explosion. Therefore, accurate battery pressure monitoring is crucial to ensuring battery quality and preventing safety hazards.

[0004] Among traditional testing methods, single-point pressure testing is commonly used for spot checks. This involves contacting the battery surface with a needle or other tool to obtain localized pressure data, suitable for precise laboratory analysis. Plane pressure testing, on the other hand, involves applying uniform pressure over a large area using a pressure plate, simulating the crushing conditions experienced during transportation or use, to test the surface compressive strength of the battery. Both types of testing methods have their respective requirements in different application scenarios, but existing equipment generally suffers from limited functionality, inconvenient switching, and low testing efficiency.

[0005] Single function and cumbersome switching between detection modes: Existing equipment typically supports only one mode: single-point or flat surface detection. Switching requires manual removal of the needle and replacement of the pressure plate, or adjustment of the entire detection head assembly, which is time-consuming and prone to deviations in detection data due to installation errors.

[0006] Battery rupture after inspection poses a safety hazard: After battery inspection, the battery shell ruptures and the internal electrolyte may leak, which can easily cause combustion when exposed to high temperatures. Existing equipment lacks supporting fire extinguishing or protective measures. Failure to handle ruptured batteries in a timely manner can easily lead to electrolyte leakage and cause small fires, which can cause equipment damage in severe cases. If the battery ruptures and catches fire during the inspection process, traditional equipment cannot respond quickly to extinguish the fire and can only rely on manual extinguishing, delaying the best time to handle it. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a battery pressure detection device, which overcomes the shortcomings of the existing technology and effectively solves the problems of single function, cumbersome switching of detection modes, and safety hazards caused by battery rupture after detection.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A battery pressure detection device includes a pressure detection box, wherein a point-to-surface switching mechanism is provided on an outer wall of one side of the pressure detection box, a hydraulic push rod is fixedly connected to the outer wall of one end of the point-to-surface switching mechanism via a flange, and the piston rod of the hydraulic push rod is fixedly connected to a pressure sensor via a bolt, a threaded sleeve is welded to the outer wall of one side of the pressure sensor, and a needle is screwed to the inner wall of the threaded sleeve, a protrusion is provided on the outer wall of one end of the needle, a pressure plate is provided on one end of the needle, and a guide opening is opened at the center of the outer wall of one side of the pressure plate;

[0010] Adjacently distributed chucks are welded on the outer wall of the pressure sensor, and a connecting rod is rotatably connected between the two chucks on the outer wall of the pressure sensor, a water baffle is welded to the outer wall at one end of the connecting rod, and one side of the outer wall of the bottom of the pressure detection box is fixedly connected with adjacently distributed water inlet and drain, and the water inlet is located at the bottom of the water baffle, and the drain is located at the bottom of one end of the water baffle.

[0011] In this solution, a hydraulic push rod is connected to the point-to-surface switching mechanism via a flange, and its piston rod drives the pressure sensor axially. The pressure sensor is detachably connected to the needle via a threaded sleeve, facilitating the replacement of different test needles, such as blunt or sharp needles for different battery materials. The guide port is precisely sized to match the needle and protrusion, preventing the needle from protruding and damaging the battery surface during flat surface testing.

[0012] Preferably, the point-to-surface switching mechanism includes a sleeve, a driving handle, a knob, a fixing ring, a spring, a sliding column, a passive sleeve and a U-shaped slide, wherein the sleeve is welded to an inner wall on one side of the pressure detection box, the driving handle is slidably connected to the inner wall of one end of the sleeve, the knob is welded to the outer wall of one end of the driving handle, the fixing ring is welded to the outer wall of the driving handle, the spring is fixedly connected between the fixing ring and the sleeve, and the spring is located outside the driving handle, the sliding column is welded to the outer wall of the driving handle, the passive sleeve is slidably connected to the outer wall of the other end of the sleeve, and the driving handle is slidably connected to the inner wall of the passive sleeve, the U-shaped slide is opened on the outer wall of the sleeve, and the sliding column is slidably connected to the inner wall of the U-shaped slide.

[0013] Through the above scheme, one end of the driving handle is connected to the knob, and the other end is engaged with the limit groove of the passive sleeve through the limit bar. When the knob is rotated, the slide column slides along the vertical track of the U-shaped slide groove, driving the driving handle to move axially, so that the needle is aimed at the single point of the battery, and the pointing arrow now points to the "single point detection" mark; when plane detection is required, press the knob to compress the spring, so that the slide column slides into the horizontal track of the U-shaped slide groove, and the passive sleeve slides axially at the same time, pushing the pressure plate forward through the limit bar, and completely retracting the needle into the guide port, and the pointing arrow now points to the "plane detection" mark.

[0014] Preferably, the cross-sectional dimensions of the guide opening are adapted to the cross-sectional dimensions of the needle and the protrusion.

[0015] Preferably, a partition is welded to the inner wall of the bottom of the pressure detection box, and a bearing seat with a bearing is installed on the outer wall of one side of the partition. The outer wall of the hydraulic push rod is rotatably connected to the inner wall of the bearing seat through a bearing. A waterproof sealing sleeve is provided through the inner wall of the partition, and the hydraulic push rod is provided through the inner wall of the waterproof sealing sleeve.

[0016] Through the above solution, the partition divides the interior of the pressure detection box into a mechanical chamber and a detection chamber, wherein the mechanical chamber is located on one side of the bearing seat, and the detection chamber is located on one side of the pressure sensor. The bearing seat and the waterproof sealing sleeve ensure the sealing of the hydraulic push rod when it passes through the partition, preventing liquid from entering the machine.

[0017] Preferably, the bottom outer wall of the water inlet is fixedly connected to a water inlet pipe, and the bottom outer wall of the drain outlet is fixedly connected to a drain pipe, and a splash-proof plate is welded to the outer wall on the other side of the partition, and the splash-proof plate is located at the top of the water inlet.

[0018] Through the above scheme, the pressure sensor is connected to the needle through a threaded sleeve, and needles of different specifications can be quickly replaced. The water baffle is connected to the outer wall of the pressure sensor through a connecting rod. When the pressure sensor moves forward, the water baffle moves accordingly, so that the water inlet is completely exposed and the drain outlet is blocked at the same time. The water baffle is reset when it retreats, closing the water inlet and opening the drain outlet. The splash guard is welded to the other side of the partition, located above the water inlet, to prevent water from impacting the splash observation window upward during water injection, thereby ensuring that the liquid level rises steadily.

[0019] Preferably, a battery is placed on the inner wall of the other side of the pressure testing box, and a U-shaped positioning plate is welded to the top of the inner wall of the other side of the pressure testing box, the battery is located on the inner side of the U-shaped positioning plate, and symmetrically distributed guide rods are fixedly connected between the partition and the pressure testing box, and a translation plate is slidably connected to the outer wall of the guide rod, the pressure plate is welded between the two translation plates, and the pressure plate and the needle are both arranged on one side of the battery.

[0020] Through the above solution, the opening width of the U-shaped positioning plate is adapted to the thickness of the battery, and the inner wall is covered with a silicone pad to avoid damaging the battery shell. When the needle or pressure plate retracts, the U-shaped positioning plate will block the battery, so that the battery is separated from the needle or pressure plate. When performing plane detection, the hydraulic push rod pushes the pressure plate to move horizontally along the guide rod to ensure that the pressure process is smooth and without tilt, and to ensure pressure uniformity during plane detection.

[0021] Preferably, a sealing cover is hingedly connected to the outer wall of the top of the pressure detection box, and an observation window is installed on the top of the sealing cover.

[0022] Through the above solution, the sealing cover is used to isolate the internal and external environments of the pressure testing box, which plays a certain protective effect, and the observation window facilitates observation of the testing process.

[0023] Preferably, the outer wall of the end of the driving handle away from the knob is welded with equally distributed limiting strips, and the inner wall of the passive sleeve is provided with limiting grooves, and the limiting grooves correspond to the limiting strips one by one.

[0024] Preferably, a directional arrow is provided on the outer wall of one side of the pressure detection box around the knob, wherein the vertical directional arrow is a single-point detection arrow, and the horizontal directional arrow is a plane detection arrow.

[0025] Preferably, a sub-control switch is fixedly connected to the top of the outer wall on one side of the pressure detection box, and a support rod is welded to the outer wall on one side of the pressure detection box. A PLC controller is fixedly connected to the top of the outer wall on one side of the support rod by bolts, and the PLC controller is connected to the sub-control switch, hydraulic push rod and pressure sensor by signal lines.

[0026] Through the above solution, the PLC controller presets the detection program: during single-point detection, the hydraulic push rod is controlled to move according to the preset coordinates to collect pressure data; during plane detection, the pressure plate is controlled to apply pressure at a constant speed, and the pressure curve is recorded in real time. The PLC controller is linked to the sub-control switch, which can preset the detection path and pressure threshold, automatically record data, and reduce manual intervention.

[0027] The beneficial effects of the present invention are:

[0028] 1. When single-point testing is required, the present invention uses a battery pressure detection device that rotates the knob and allows the slide column to slide within the U-shaped slot, aligning the needle with the battery. The hydraulic push rod drives the needle vertically to a specific point on the battery surface, and the pressure sensor cooperates to obtain local pressure data.

[0029] When plane detection is required, the knob is pressed to compress the spring, and the passive sleeve engages with the limit bar and the limit groove to push the pressure plate forward, storing the needle in the guide port of the pressure plate. The flat structure of the pressure plate is used to detect the pressure distribution on a large area of ​​the battery surface. This design does not require the removal of parts and is easy to operate. It can meet the needs of quickly switching detection modes on the production line and solves the problem of single function of traditional equipment.

[0030] 2. In the battery pressure detection device of the present invention, when the hydraulic push rod pushes the pressure sensor close to the battery, the connecting rod drives the water baffle to move, opening the water inlet and closing the water outlet. External water is injected into the pressure detection box through the water inlet pipe. Under the action of the splash guard, the water flows evenly into the detection area. On the one hand, it can simulate a humid environment, and on the other hand, it can quickly cool down and extinguish the fire when the battery ruptures. After the detection is completed, the hydraulic push rod retracts, the water baffle is reset, the water outlet is opened, the water inlet is closed, and the waste liquid can be discharged through the drain pipe;

[0031] This design implements full-process safety control: "water injection protection before testing → real-time cooling during testing → rapid drainage after testing," reducing the risk of fire after battery rupture.

[0032] 3. The battery pressure detection device of the present invention realizes rapid switching between single-point detection and plane detection through the mechanical linkage of the point-to-plane switching mechanism and the hydraulic push rod, pressure sensor, needle, protrusion and pressure plate. The point-to-plane switching is efficient and flexible, meeting the needs of multiple detection. On this basis, the water baffle is driven by the pressure sensor, and the water baffle can be linked to control the flow. Before the detection starts, water is automatically injected by moving the water baffle to ensure that when the battery ruptures, the liquid level has covered the surrounding area of ​​the battery, realizing the seamless connection of "detection and protection". The overall device has the characteristics of integrated detection and fire extinguishing dual functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The overall structure of a battery pressure detection device proposed by the present invention is shown in FIG. Figure 1 ;

[0034] Figure 2 The overall structure of a battery pressure detection device proposed by the present invention is shown in FIG. Figure 2 ;

[0035] Figure 3 This is a schematic diagram of the overall structure of a battery pressure detection device proposed by the present invention;

[0036] Figure 4 A bottom view of the battery pressure detection device proposed by the present invention when its body structure is unfolded;

[0037] Figure 5 This is a schematic diagram of the structure of a battery pressure detection device proposed by the present invention when the needle is piercing the battery;

[0038] Figure 6 This is a schematic structural diagram of a battery pressure detection device proposed by the present invention when a pressure plate squeezes a battery;

[0039] Figure 7 This is a schematic diagram of the internal connections of a pressure detection box of a battery pressure detection device proposed by the present invention;

[0040] Figure 8 This is a schematic diagram of the pressure plate structure of a battery pressure detection device proposed by the present invention;

[0041] Figure 9 This is a schematic diagram of a point-to-surface switching mechanism of a battery pressure detection device proposed by the present invention;

[0042] Figure 10 This is a cross-sectional view of the point-to-surface switching mechanism of a battery pressure detection device proposed by the present invention.

[0043] In the figure: 1. Pressure detection box; 2. Point-to-surface switching mechanism; 201. Sleeve; 202. Driving handle; 203. Knob; 204. Fixing ring; 205. Spring; 206. Sliding column; 207. Passive sleeve; 208. U-shaped slide; 3. Hydraulic push rod; 4. Pressure sensor; 5. Needle; 6. Protrusion; 7. Pressure plate; 8. Guide port; 9. Connecting rod; 10. Water baffle; 11. Water inlet; 12. Water inlet pipe; 13. Drain outlet; 14. Drain pipe; 15. Partition; 16. Bearing seat; 17. Waterproof sealing sleeve; 18. Splash-proof plate; 19. U-shaped positioning plate; 20. Guide rod; 21. Sealing cover; 22. Observation window; 23. Limit strip; 24. Limit slot; 25. Pointing arrow; 26. Sub-control switch; 27. Support rod; 28. PLC controller; 29. ​​Translation plate. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Reference Figures 1-10 , embodiment 1, a battery pressure detection device, including a pressure detection box 1, the outer wall of one side of the pressure detection box 1 is provided with a point-surface switching mechanism 2, the point-surface switching mechanism 2 includes a sleeve 201, a driving handle 202, a knob 203, a fixing ring 204, a spring 205, a sliding column 206, a passive sleeve 207 and a U-shaped sliding groove 208, wherein the sleeve 201 is welded to the inner wall of one side of the pressure detection box 1, the driving handle 202 is slidably connected to the inner wall of one end of the sleeve 201, and the knob 203 is welded to one end of the driving handle 202. On the outer wall of the end, the fixing ring 204 is welded to the outer wall of the driving handle 202, the spring 205 is fixedly connected between the fixing ring 204 and the sleeve 201, and the spring 205 is located outside the driving handle 202, the sliding column 206 is welded to the outer wall of the driving handle 202, the passive sleeve 207 is slidably connected to the outer wall of the other end of the sleeve 201, and the driving handle 202 is slidably connected to the inner wall of the passive sleeve 207, the U-shaped groove 208 is opened on the outer wall of the sleeve 201, and the sliding column 206 is slidably connected to the inner wall of the U-shaped groove 208;

[0046] The outer wall of the end of the driving handle 202 away from the knob 203 is welded with equally spaced limiting strips 23, and the inner wall of the passive sleeve 207 is provided with limiting grooves 24, and the limiting grooves 24 correspond one to one with the limiting strips 23;

[0047] A directional arrow 25 is provided on the outer wall of one side of the pressure detection box 1 around the knob 203, wherein the vertical directional arrow 25 is a single-point detection arrow, and the horizontal directional arrow 25 is a plane detection arrow.

[0048] Through the above solution, the core of the point-surface switching mechanism 2 is to achieve rapid switching of the detection mode through mechanical linkage:

[0049] The sleeve 201 is fixed to the inner wall of the pressure detection box 1 and serves as a sliding guide structure for the driving handle 202. The knob 203 needs to be pressed to rotate and switch modes to avoid accidental movement of the detection head due to accidental touch;

[0050] One end of the driving handle 202 is connected to the knob 203, and the other end is engaged with the limiting groove 24 of the passive sleeve 207 through the limiting bar 23. When the knob 203 is rotated, the slide column 206 slides along the vertical track of the U-shaped slide groove 208, driving the driving handle 202 to move axially, so that the needle 5 is aligned with the single point of the battery. At this time, the pointing arrow 25 points to the "single point detection" mark; when plane detection is required, pressing the knob 203 compresses the spring 205, so that the slide column 206 slides into the horizontal track of the U-shaped slide groove 208, and the passive sleeve 207 slides axially, pushing the pressure plate 7 forward through the limiting bar 23, and completely receiving the needle 5 into the guide port 8. At this time, the pointing arrow 25 points to the "plane detection" mark.

[0051] The outer wall of one end of the point-to-surface switching mechanism 2 is fixedly connected to a hydraulic push rod 3 through a flange, and the piston rod of the hydraulic push rod 3 is fixedly connected to a pressure sensor 4 through a bolt. A threaded sleeve is welded to the outer wall of one side of the pressure sensor 4, and a needle 5 is screwed to the inner wall of the threaded sleeve. A protrusion 6 is provided on the outer wall of one end of the needle 5, and a pressure plate 7 is provided at one end of the needle 5, and a guide opening 8 is opened at the center of the outer wall of one side of the pressure plate 7. The cross-sectional size of the guide opening 8 is adapted to the cross-sectional size of the needle 5 and the protrusion 6.

[0052] Through the above solution, hydraulic push rod 3 is connected to point-to-surface switching mechanism 2 via a flange, and its piston rod drives pressure sensor 4 in axial motion. Pressure sensor 4 is detachably connected to needle 5 via a threaded sleeve, facilitating the replacement of different-sized testing needles, such as blunt or sharp needles for different battery materials. The dimensions of guide opening 8 precisely match needle 5 and protrusion 6, preventing protrusion 5 from protruding and damaging the battery surface during flat surface testing.

[0053] In this embodiment, when single-point detection is required, the knob 203 is rotated, and the slide column 206 slides in the U-shaped slide groove 208 to align the needle 5 with the battery. The hydraulic push rod 3 drives the needle 5 vertically to a specific point on the battery surface, and cooperates with the pressure sensor 4 to obtain local pressure data.

[0054] When plane detection is required, the knob 203 is pressed to compress the spring 205, and the passive sleeve 207 pushes the pressure plate 7 forward through the engagement of the limit bar 23 and the limit groove 24, so that the needle 5 is stored in the guide opening 8 of the pressure plate 7. The flat structure of the pressure plate 7 is used to detect the pressure distribution on a large range of the battery surface. This design does not require the removal of parts and is easy to operate. It can meet the needs of quickly switching detection modes on the production line and solve the problem of single function of traditional equipment.

[0055] Through the mechanical linkage of the point-to-surface switching mechanism 2 and the hydraulic push rod 3, pressure sensor 4, needle 5, protrusion 6 and pressure plate 7, rapid switching between single-point detection and plane detection is achieved. The point-to-surface switching is efficient and flexible, meeting the needs of multiple detection.

[0056] In the second embodiment, adjacently distributed chucks are welded on the outer wall of the pressure sensor 4, and a connecting rod 9 is rotatably connected between the two chucks on the outer wall of the pressure sensor 4, a water baffle 10 is welded to the outer wall at one end of the connecting rod 9, and an adjacently distributed water inlet 11 and a drain outlet 13 are fixedly connected to one side of the bottom outer wall of the pressure detection box 1, and the water inlet 11 is located at the bottom of the water baffle 10, and the drain outlet 13 is located at the bottom of one end of the water baffle 10, the bottom outer wall of the water inlet 11 is fixedly connected to a water inlet pipe 12, and the bottom outer wall of the drain outlet 13 is fixedly connected to a drain pipe 14, and the outer wall on the other side of the partition 15 is welded to a splash-proof plate 18, and the splash-proof plate 18 is located at the top of the water inlet 11.

[0057] Through the above scheme, the pressure sensor 4 is connected to the needle 5 through a threaded sleeve, and needles of different specifications can be quickly replaced. The water baffle 10 is connected to the outer wall of the pressure sensor 4 through the rotation of the connecting rod 9. When the pressure sensor 4 moves forward, the water baffle 10 moves accordingly, so that the water inlet 11 is completely exposed, while blocking the drain outlet 13. The water baffle 10 is reset when it retreats, closing the water inlet 11 and opening the drain outlet 13. The splash guard 18 is welded to the other side of the partition 15, located above the water inlet 11, to prevent the water flow from impacting the splash observation window 22 upward during water injection, thereby ensuring that the liquid level rises steadily.

[0058] In this embodiment, when the hydraulic push rod 3 pushes the pressure sensor 4 close to the battery, the connecting rod 9 drives the water baffle 10 to move, so that the water inlet 11 is opened and the drain port 13 is closed. The external water source is injected into the pressure detection box 1 through the water inlet pipe 12. The water flow evenly flows into the detection area under the action of the splash plate 18. On the one hand, it can simulate a humid environment, and on the other hand, it can quickly cool down and extinguish the fire when the battery ruptures. After the detection is completed, the hydraulic push rod 3 retracts, the water baffle 10 is reset, the drain port 13 is opened, the water inlet 11 is closed, and the waste liquid can be discharged through the drain pipe 14;

[0059] This design implements full-process safety control: "water injection protection before testing → real-time cooling during testing → rapid drainage after testing," reducing the risk of fire after battery rupture.

[0060] The water baffle 10 is driven by the pressure sensor 4, and the water baffle 10 can be linked to control the flow. Before the detection begins, water is automatically injected by moving the water baffle 10 to ensure that when the battery ruptures, the liquid level has covered the area around the battery, realizing the seamless connection of "detection and protection". The whole system has the characteristics of integrated detection and fire extinguishing dual functions.

[0061] A partition 15 is welded to the inner wall of the bottom of the pressure detection box 1, and a bearing seat 16 with a bearing is installed on the outer wall of one side of the partition 15. The outer wall of the hydraulic push rod 3 is rotatably connected to the inner wall of the bearing seat 16 through a bearing. A waterproof sealing sleeve 17 is penetrated on the inner wall of the partition 15, and the hydraulic push rod 3 is penetrated on the inner wall of the waterproof sealing sleeve 17.

[0062] Through the above scheme, the partition 15 divides the interior of the pressure detection box 1 into a mechanical chamber and a detection chamber, wherein the mechanical chamber is located on one side of the bearing seat 16, and the detection chamber is located on one side of the pressure sensor 4. The bearing seat 16 and the waterproof sealing sleeve 17 ensure the sealing of the hydraulic push rod 3 when passing through the partition 15 to prevent liquid from entering the machine.

[0063] A battery is placed on the inner wall of the other side of the pressure testing box 1, and a U-shaped positioning plate 19 is welded to the top of the inner wall of the other side of the pressure testing box 1. The battery is located on the inner side of the U-shaped positioning plate 19. A symmetrically distributed guide rod 20 is fixedly connected between the partition 15 and the pressure testing box 1, and a translation plate 29 is slidably connected to the outer wall of the guide rod 20. The pressure plate 7 is welded between the two translation plates 29. The pressure plate 7 and the needle 5 are both arranged on one side of the battery.

[0064] Through the above solution, the opening width of the U-shaped positioning plate 19 is adapted to the thickness of the battery, and the inner wall is covered with a silicone pad to avoid damaging the battery shell. When the needle 5 or the pressure plate 7 retracts, the U-shaped positioning plate 19 will block the battery, so that the battery is separated from the needle 5 or the pressure plate 7. When performing plane detection, the hydraulic push rod 3 pushes the pressure plate 7 to move horizontally along the guide rod 20 to ensure that the pressure process is smooth and without tilt, and to ensure pressure uniformity during plane detection.

[0065] A sealing cover 21 is hingedly connected to the outer wall of the top of the pressure detection box 1 , and an observation window 22 is installed on the top of the sealing cover 21 .

[0066] Through the above solution, the sealing cover 21 is used to isolate the internal and external environments of the pressure detection box 1, and has a certain protective effect. The observation window 22 is convenient for observing the detection process.

[0067] A sub-control switch 26 is fixedly connected to the top of the outer wall of one side of the pressure detection box 1, and a support rod 27 is welded to the outer wall of one side of the pressure detection box 1. A PLC controller 28 is fixedly connected to the top of the outer wall of one side of the support rod 27 by bolts. The PLC controller 28 is connected to the sub-control switch 26, the hydraulic push rod 3 and the pressure sensor 4 by signal lines.

[0068] Through the above scheme, the PLC controller 28 presets the detection program: during single-point detection, the hydraulic push rod 3 is controlled to move according to the preset coordinates to collect pressure data; during plane detection, the pressure plate 7 is controlled to apply pressure at a constant speed, and the pressure curve is recorded in real time. The PLC controller 28 is linked to the sub-control switch 26, which can preset the detection path and pressure threshold, automatically record data, and reduce manual intervention.

[0069] Working principle:

[0070] Preparation before testing: Open the sealing cover 21, put the battery into the pressure testing box 1, position the battery through the U-shaped positioning plate 19, adjust the position of the translation plate 29 on the guide rod 20, and align the battery side with the pressure plate 7 and the needle 5.

[0071] According to the detection requirements, use knob 203 to switch to single point or plane detection mode:

[0072] Single point detection: Rotate the knob 203 to slide the slide post 206 along the vertical track of the U-shaped slide groove 208. The slide post 206 is located at the top of the U-shaped slide groove 208. At this time, the pointing arrow 25 points to the "single point detection" mark.

[0073] Plane detection: Press the knob 203 to compress the spring 205, so that the slide 206 slides into the bottom end of the U-shaped slide groove 208. The pressure plate 7 is located on the side of the battery, and the pointing arrow 25 points to the "plane detection" mark.

[0074] Testing process:

[0075] Single point detection:

[0076] Start the sub-control switch 26, the PLC controller 28 controls the hydraulic push rod 3 to slowly extend, the needle 5 punctures the battery surface, and the pressure sensor 4 collects pressure data in real time and transmits it to the PLC controller 28. After the single-point detection is completed, the hydraulic push rod 3 retracts and moves to the point to be detected according to the preset program, preparing for the next test.

[0077] Plane detection: Start the sub-control switch 26, the hydraulic push rod 3 pushes the pressure sensor 4 to move, the needle 5 is retracted into the guide port 8, and the needle 5 continues to push the pressure plate 7 to translate along the guide rod 20. The pressure plate 7 applies uniform pressure to the side of the battery. The pressure sensor 4 synchronously collects the plane pressure distribution data, and the PLC controller 28 analyzes the data and generates a pressure cloud map.

[0078] Fire extinguishing protection: The water baffle 10 rotates as the pressure sensor 4 moves forward, opening the water inlet 11, and water flows into the detection box. The liquid level gradually submerges the bottom of the battery to form a fire-proof liquid layer. After the detection is completed, the hydraulic push rod 3 retracts, the water baffle 10 resets, automatically closing the water inlet 11 and opening the drain port 13, and the liquid in the pressure detection box 1 is quickly emptied.

[0079] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A battery pressure detection device, comprising a pressure detection box (1), characterized in that: A point-surface switching mechanism (2) is provided on the outer wall of one side of the pressure detection box (1), a hydraulic push rod (3) is fixedly connected to the outer wall of one end of the point-surface switching mechanism (2) via a flange, and the piston rod of the hydraulic push rod (3) is fixedly connected to a pressure sensor (4) via a bolt, a threaded sleeve is welded to the outer wall of one side of the pressure sensor (4), and a needle (5) is screwed to the inner wall of the threaded sleeve, a protrusion (6) is provided on the outer wall of one end of the needle (5), a pressure plate (7) is provided on one end of the needle (5), and a guide opening (8) is opened at the center of the outer wall of one side of the pressure plate (7); The outer wall of the pressure sensor (4) is welded with adjacently distributed chucks, and a connecting rod (9) is rotatably connected between the two chucks on the outer wall of the pressure sensor (4), and a water baffle (10) is welded to the outer wall of one end of the connecting rod (9). One side of the outer wall of the bottom of the pressure detection box (1) is fixedly connected with an adjacently distributed water inlet (11) and a drain (13), and the water inlet (11) is located at the bottom of the water baffle (10), and the drain (13) is located at the bottom of the other end of the water baffle (10). When the hydraulic push rod (3) pushes the pressure sensor (4) close to the battery, the connecting rod (9) drives the water baffle (10) to move, so that the water inlet (11) is opened and the drain (13) is closed. After the detection is completed, the piston rod of the hydraulic push rod (3) retracts, and the connecting rod (9) drives the water baffle (10) to reset, so that the water inlet (11) is closed and the drain (13) is opened. The point-to-surface switching mechanism (2) comprises a sleeve (201), a driving handle (202), a knob (203), a fixing ring (204), a spring (205), a sliding column (206), a passive sleeve (207) and a U-shaped sliding groove (208), wherein the sleeve (201) is welded to an inner wall of one side of the pressure detection box (1), the driving handle (202) is slidably connected to an inner wall of one end of the sleeve (201), the knob (203) is welded to an outer wall of one end of the driving handle (202), and the fixing ring (204) is welded to an outer wall of the driving handle (202). The spring (205) is fixedly connected between the fixing ring (204) and the sleeve (201), and the spring (205) is located outside the driving handle (202), the sliding column (206) is welded to the outer wall of the driving handle (202), the passive sleeve (207) is slidably connected to the outer wall of the other end of the sleeve (201), and the driving handle (202) is slidably connected to the inner wall of the passive sleeve (207), the U-shaped sliding groove (208) is opened on the outer wall of the sleeve (201), and the sliding column (206) is slidably connected to the inner wall of the U-shaped sliding groove (208).

2. A battery pressure detection device according to claim 1, characterized in that: The cross-sectional dimensions of the guide opening (8) are adapted to the cross-sectional dimensions of the needle (5) and the protrusion (6).

3. The battery pressure detection device according to claim 1, characterized in that: A partition (15) is welded to the inner wall of the bottom of the pressure detection box (1), and a bearing seat (16) with a bearing is installed on the outer wall of one side of the partition (15). The outer wall of the hydraulic push rod (3) is rotatably connected to the inner wall of the bearing seat (16) through the bearing. A waterproof sealing sleeve (17) is provided through the inner wall of the partition (15), and the hydraulic push rod (3) is provided through the inner wall of the waterproof sealing sleeve (17).

4. A battery pressure detection device according to claim 3, characterized in that: The bottom outer wall of the water inlet (11) is fixedly connected to a water inlet pipe (12), and the bottom outer wall of the drain outlet (13) is fixedly connected to a drain pipe (14). An anti-splash plate (18) is welded to the outer wall of the other side of the partition (15), and the anti-splash plate (18) is located on the top of the water inlet (11).

5. The battery pressure detection device according to claim 3, characterized in that: A battery is placed on the inner wall of the other side of the pressure detection box (1), and a U-shaped positioning plate (19) is welded to the top of the inner wall of the other side of the pressure detection box (1). The battery is located on the inner side of the U-shaped positioning plate (19). A symmetrically distributed guide rod (20) is fixedly connected between the partition (15) and the pressure detection box (1), and a translation plate (29) is slidably connected to the outer wall of the guide rod (20). The pressure plate (7) is welded between the two translation plates (29). The pressure plate (7) and the needle (5) are both arranged on one side of the battery.

6. The battery pressure detection device according to claim 1, characterized in that: A sealing cover (21) is hingedly connected to the outer wall of the top of the pressure detection box (1), and an observation window (22) is installed on the top of the sealing cover (21).

7. The battery pressure detection device according to claim 1, characterized in that: The outer wall of one end of the driving handle (202) away from the knob (203) is welded with equally spaced limiting strips (23), and the inner wall of the passive sleeve (207) is provided with limiting grooves (24), and the limiting grooves (24) correspond to the limiting strips (23) in a one-to-one manner.

8. The battery pressure detection device according to claim 7, characterized in that: A directional arrow (25) is provided on the outer wall of one side of the pressure detection box (1) around the knob (203), wherein the vertical directional arrow (25) is a single-point detection arrow, and the horizontal directional arrow (25) is a plane detection arrow.

9. The battery pressure detection device according to claim 1, characterized in that: A sub-control switch (26) is fixedly connected to the top of the outer wall of one side of the pressure detection box (1), and a support rod (27) is welded to the outer wall of one side of the pressure detection box (1). A PLC controller (28) is fixedly connected to the top of the outer wall of one side of the support rod (27) by bolts. The PLC controller (28) is connected to the sub-control switch (26), the hydraulic push rod (3) and the pressure sensor (4) by signal lines.

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