A battery case sealing property detection device

Abstract

The application discloses a kind of battery box sealing detection device, it is related to battery box sealing detection technical field, including main body, exhaust device, air inlet device and ventilation device, impurity in air source is filtered and handled by air inlet device, ventilation device fills in after filtering gas into measured piece and standard piece, when airflow flow rate drops at the end of exhaust, high-speed airflow is injected into exhaust pipe, suction effect is formed to exhaust pipe to assist exhaust, the ability of airflow to carry away impurities is enhanced, water vapor accumulated is sucked into high-speed airflow and discharged by the negative pressure of venturi throat pipe at the same time, prevent moisture from long-term retention in pipeline, and large-particle impurities in airflow are separated and removed by centrifugal force, small impurities are blocked by filter plate, automatically reverse blow cleaning filter plate at the end of exhaust, prevent filter plate from being blocked, ensure that exhaust pipeline remains unobstructed for a long time, reduce equipment maintenance cost, improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery box sealing test technology, specifically a battery box sealing test device. Background Technology

[0002] When testing the sealing performance of a battery box, the differential pressure method is usually used. Dry and purified compressed gas or nitrogen is filled into a standard container and the battery box under test. After the pressure stabilizes, the pressure difference between the standard container and the battery box under test is measured. The sealing performance of the battery box is then determined based on the pressure change. After the test is completed, the gas filled into the standard container and the battery box under test is discharged.

[0003] During the production process, the battery box may contain residual cleaning moisture, metal shavings, dust, and other foreign objects. These impurities are carried out by the airflow into the exhaust pipe during venting. These impurities will deposit on the pipe wall. In the early stage of venting, the flow rate is high, and most of the larger particles of impurities and most of the moisture can be carried out. However, in the later stage of venting, the flow rate decreases, and the airflow's ability to carry impurities and moisture decreases accordingly. Some small particles and water droplets are easy to adhere to the inner wall of the exhaust pipe. The long-term accumulation of these attached impurities may block the pipe, increase venting resistance, slow down the venting speed, and result in incomplete venting, which will increase equipment maintenance costs and reduce production efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing test device for battery boxes to solve the problem of impurities depositing on the inner wall of pipes during exhaust in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: It includes a main body, an air intake device installed on one side of the main body, an exhaust device installed on one side of the air intake device, and a ventilation device installed on the other side of the air intake device. The air intake device and the ventilation device are connected by a pipeline. During testing, the battery box to be tested and a standard component are simultaneously connected to the pipeline via the ventilation device. The air intake device filters the gas from the gas source and transports it to the ventilation device. The ventilation device fills the battery box to be tested and the standard component with gas. After the pressure is balanced, the differential pressure sensor inside the main body, using the standard component as a reference, detects the pressure drop value of the battery box to be tested, thus determining the leakage rate of the battery box. After the test is completed, the gas inside the battery box to be tested and the standard component is discharged through the exhaust device.

[0006] The exhaust device includes a pulse dehydration component and a cleanliness component. The cleanliness component is installed on one side of the main body, and a backwashing component is installed on the cleanliness component. The backwashing component and the cleanliness component are connected by a pipe. The gas discharged from the battery box and standard parts to be tested first enters the cleanliness component. The cleanliness component removes large impurities in the airflow, while small impurities are blocked by the backwashing component. The pulse dehydration component gathers water vapor in the airflow together and generates a pulse airflow at the end of the exhaust to assist in the exhaust. At the same time, it sucks away the accumulated water droplets to prevent impurities in the airflow from clogging the pipe.

[0007] The pulse dewatering assembly includes an air supply box mounted on the main body. A trigger element is installed on one side of the air supply box, connected to the air supply box via a pipe. The trigger element is also connected to the backwashing assembly via a pipe. A pressure relief element is installed on one side of the trigger element. A water collection element is installed inside the air supply box, and a debris removal assembly is installed on one side of the air supply box. When gas enters the water collection element, the water collection element accumulates water vapor in the airflow. The airflow then enters the air supply box and exits from the air supply box. At the end of the exhaust phase, the exhaust pressure decreases, and the trigger element assists in the exhaust by releasing a pulsed airflow into the air supply box, while simultaneously drawing away and discharging the water droplets accumulated in the water collection element.

[0008] The backwashing assembly includes an air jet element installed within the impurity removal assembly. An energy storage element is mounted on one side of the air jet element, and the air jet element and the energy storage element are connected by a pipe. When the trigger element discharges a pulsed airflow, it simultaneously charges the energy storage element with airflow. When the venting ends, the energy storage element discharges the charged gas into the air jet element.

[0009] The air supply box includes a connecting box. An exhaust tailpipe is installed on one side of the connecting box and is mounted on the main body. A connecting groove is provided inside the connecting box. An inclined groove and a first air inlet groove are installed on the connecting box, and the inclined groove and the first air inlet groove are connected to the connecting groove. A water collection element is installed on the other side of the connecting box. During exhaust, gas enters the connecting groove from the water collection element, exits from the connecting groove into the exhaust tailpipe, and is discharged. At the same time, gas enters the trigger element from the first air inlet groove.

[0010] The triggering element includes a trigger housing mounted on a connecting box. An intake chamber and an exhaust chamber are provided inside the trigger housing. A piston is slidably mounted between the intake and exhaust chambers. A throttling orifice is provided on the piston. A first elastic element is mounted on one side of the piston, and one end of the first elastic element is mounted on the exhaust chamber. A connecting post is mounted on the other side of the piston, and a blocking plate is mounted on one side of the connecting post. A second intake groove and a first air chamber are provided on the intake chamber, and the second intake groove and the first intake groove are connected. A first one-way valve is installed in the second intake groove. The blocking plate slides within the first air chamber. A converging chamber is installed on one side of the first air chamber, a throat chamber is installed on one side of the converging chamber, a diverging chamber is installed on one side of the throat chamber, and a second air chamber is installed on one side of the diverging chamber. The second air chamber is connected to an inclined groove.

[0011] The first elastic element is the first spring. During normal exhaust, the airflow enters the second intake groove through the first intake groove, enters the intake chamber from the second intake groove, and then enters the exhaust chamber through the throttle orifice. When the air pressure in the exhaust chamber is higher than the threshold, the pressure relief element releases the pressure in the exhaust chamber. At this time, the piston drives the connecting column to move closer to the pressure relief element, and the connecting column drives the air-blocking plate to move closer to the pressure relief element. Because the air pressure in the intake chamber is high during normal exhaust, the air supply speed from the throttle orifice to the exhaust chamber is fast. The air supply speed is faster than the pressure relief speed, and the pressure difference between the intake chamber and the exhaust chamber is small. The piston cannot overcome the elastic force of the first spring to carry the air-blocking plate away from the first air chamber, and the gas in the intake chamber cannot enter the first air chamber.

[0012] As exhaust reaches its final stage, the pressure in the intake chamber gradually decreases, and the gas supply speed through the throttle orifice drops. Because the gas supply speed is slower than the pressure relief speed, the pressure in the exhaust chamber decreases, and the pressure difference between the intake and exhaust chambers increases. The piston overcomes the elastic force of the first spring and pulls the vent plate away from the first air chamber. At this moment, the high-pressure gas in the intake chamber is instantly discharged from the first air chamber, passing sequentially through the converging chamber, throat chamber, expanding chamber, and second air chamber, and finally discharged from the inclined groove into the connecting groove, forming a powerful high-pressure pulse. After the pulse, the pressure in the intake chamber further decreases, the pressure relief element resets and closes, and the gas in the intake chamber re-pressurizes the exhaust chamber through the throttle orifice. The vent plate re-closes the first air chamber, and the next cycle begins. The above cycle is repeated at the end of exhaust, generating continuous high-pressure pulses until the exhaust pressure is insufficient to trigger again.

[0013] The pressure relief element includes a pressure relief housing mounted on a trigger housing. A pressure relief chamber is located within the pressure relief housing, and a first sliding block is slidably mounted within the chamber. A second sliding block is mounted on one side of the first sliding block and slides within the exhaust chamber. A second elastic element is mounted on the other side of the first sliding block, with one end of the second elastic element mounted on the pressure relief chamber. A pressure relief pipe is mounted on the pressure relief chamber. The second elastic element is a second spring. When the pressure in the exhaust chamber reaches a threshold, the air pressure causes the second sliding block to move away from the trigger housing, which in turn causes the first sliding block to move away from the trigger housing. Airflow enters the pressure relief chamber until the gas in the chamber is discharged through the pressure relief pipe.

[0014] The water collection element includes a water collection pipe mounted on a connecting box. Inside the water collection pipe is a separation cylinder containing spiral blades. An annular water collection groove is formed on the inner wall of the water collection pipe, and a suction pipe is installed on the annular water collection groove. The suction pipe and the throat cavity are connected by a pipe. When gas enters the water collection pipe, the airflow rotates as it passes through the spiral blades. Liquid droplets in the airflow are thrown against the pipe wall by centrifugal force, forming a water film that flows along the wall until it accumulates in the annular water collection groove. When pulsed exhaust occurs, the airflow creates negative pressure in the throat cavity, drawing the water film from the annular water collection groove into the throat cavity via the suction pipe, where it is then discharged from the second air chamber along with the airflow.

[0015] The jet element includes an exhaust pipe mounted on a water collection pipe. A filter plate is installed inside the exhaust pipe, and an exhaust ring with exhaust holes is mounted on one side of the filter plate. The exhaust ring is connected to an energy storage element via a pipe. When airflow passes through the exhaust pipe, small impurities in the airflow are blocked by the filter plate. After exhaust, the energy storage element charges the exhaust ring with gas, and the exhaust ring sprays gas through the exhaust holes towards the back of the filter plate, blowing off any adhering impurities and preventing them from obstructing airflow.

[0016] The energy storage element includes an energy storage tank mounted on a water collection pipe. An energy storage plate is slidably installed inside the energy storage tank. A detection column is mounted on one side of the energy storage plate, located inside the water collection pipe. A limit ring is installed inside the energy storage tank. A third elastic element is mounted on the energy storage plate, with one end of the third elastic element installed inside the energy storage tank. An inflation pipe is installed on one side of the energy storage tank, connected to the first air chamber via a pipe. An air blowing pipe is installed on the other side of the energy storage tank, connected to the air jet ring via a pipe. The third elastic element is a third spring. An overflow valve is installed on the energy storage tank. When the pulsed airflow passes through the first air chamber, the airflow enters the energy storage tank through the inflation pipe. The detection column senses the air pressure inside the water collection pipe. When the air pressure inside the energy storage tank reaches a threshold, it is discharged through the overflow valve. When the exhaust stops, the exhaust pressure inside the water collection pipe returns to zero, the energy storage plate moves closer to the water collection pipe, and the airflow inside the energy storage tank enters the air jet ring through the air blowing pipe.

[0017] The impurity removal assembly includes a centrifuge cylinder mounted on an exhaust pipe. A tangential exhaust pipe is installed on the centrifuge cylinder. A collection box is installed on one side of the centrifuge cylinder. A conical groove is provided inside the collection box. A collection trough is installed on one side of the conical groove. A baffle block is slidably installed inside the conical groove. A conical block is installed on the baffle block. A guide post is installed on one side of the conical block. A limit plate is installed on one side of the guide post. A support cylinder is installed on the centrifuge cylinder. The limit plate slides inside the support cylinder. A fourth elastic element is installed on one side of the limit plate. One end of the fourth elastic element is installed on the support cylinder. The fourth elastic element is the fourth spring. An exhaust valve is installed at one end of the tangential exhaust pipe. The exhaust valve is connected to the control system. When exhausting, the exhaust valve is opened, and the gas enters the centrifuge from the tangential exhaust pipe. Large impurities in the airflow accumulate on the surface of the conical block. The air pressure presses the baffle block into the conical groove. The separated airflow enters the exhaust pipe. When exhausting stops, the fourth spring resets and moves the limit plate away from the conical groove. The limit plate moves the guide column away from the conical groove. The guide column moves the conical block away from the conical groove. The conical block moves the baffle block away from the conical groove. The impurities accumulated on the conical block fall into the collection tank.

[0018] The air intake device includes a filter, which is installed on the main body. A solenoid valve is installed on one side of the filter. The filter and the solenoid valve are connected by a pipe. The solenoid valve and the filter are connected to the control system. The gas from the air source enters the filter, and the filter filters out impurities in the gas before it enters the solenoid valve.

[0019] The ventilation device includes a test pipe and a standard pipe, which are mounted on the main body and connected to a solenoid valve via pipes. Gas from the solenoid valve enters the test pipe and the standard pipe, respectively filling the battery box and the standard component under test.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: by using a pulse dehydration component and a purification component, when the airflow velocity decreases at the end of the exhaust phase, the water vapor accumulated in the pipeline is first collected, and then a pulse airflow is generated to spray a high-speed airflow into the exhaust pipe, which forms a suction effect on the exhaust pipe to assist exhaust, improve the exhaust capacity at the end of the exhaust phase, and enhance the ability of the airflow to carry away impurities. At the same time, the negative pressure of the venturi throat draws the accumulated water vapor into the high-speed airflow, and it is atomized and discharged with the high-speed airflow, preventing water from remaining in the pipeline for a long time. Furthermore, the centrifugal force separates and removes large particulate impurities in the airflow, while small impurities are blocked by the filter plate. At the end of the exhaust phase, the filter plate is automatically back-blown, causing the impurities attached to the surface of the filter plate to fall off and be discharged, preventing the filter plate from clogging, ensuring that the exhaust pipeline remains unobstructed for a long time, reducing equipment maintenance costs, and improving production efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of the sealing detection device of the present invention;

[0022] Figure 2 This is a perspective view of the exhaust device of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the exhaust device of the present invention;

[0024] Figure 4 This is a perspective view of the air supply box of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the trigger element of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the pressure relief element of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the water collection element of the present invention;

[0028] Figure 8 This is a perspective view of the air intake device and the air venting device of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the backwashing assembly of the present invention;

[0030] Figure 10 This is a schematic diagram of the internal structure of the impurity removal component of the present invention.

[0031] In the diagram: 1. Main body; 2. Exhaust device; 21. Pulse dewatering assembly; 211. Air supply box; 2111. Connecting box; 2112. Exhaust tailpipe; 2113. First air inlet groove; 2114. Inclined groove; 212. Trigger element; 2121. Trigger housing; 2122. Air inlet chamber; 2123. Exhaust chamber; 2124. Piston; 2125. Air blocking plate; 2126. First elastic element; 2127. First air chamber; 2128. Throat chamber; 2129. Second air chamber; 213. Pressure relief element; 2131. Pressure relief housing; 2132. Pressure relief chamber; 2133. First sliding block; 2134. Second sliding block; 2135. Second elastic element; 2136. Pressure relief pipe; 214. Water collection element; 2141. Water collection pipe; 2142. Separation cylinder; 2143, Spiral Blade; 2144, Annular Water Collection Tank; 2145, Suction Pipe; 22, Backwash Assembly; 221, Jet Element; 2211, Air Outlet Pipe; 2212, Filter Plate; 2213, Jet Ring; 222, Energy Storage Element; 2221, Energy Storage Box; 2222, Energy Storage Disc; 2223, Detection Column; 2224, Limiting Ring; 2225, Third Elastic Component; 2226, Air Blowing Pipe; 2227, Air Inflation Pipe; 23, Impurity Removal Assembly; 231, Centrifuge Cylinder; 232, Tangential Exhaust Pipe; 233, Material Baffle; 234, Conical Block; 235, Fourth Elastic Component; 236, Collection Tank; 237, Support Cylinder; 3, Air Inlet Device; 31, Filter; 32, Solenoid Valve; 4, Ventilation Device; 41, Test Pipe; 42, Standard Pipe. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1-9The first embodiment of the present invention shown includes a battery box sealing test device comprising a main body 1, an air inlet device 3 installed on one side of the main body 1, an exhaust device 2 installed on one side of the air inlet device 3, and a ventilation device 4 installed on the other side of the air inlet device 3. The air inlet device 3 and the ventilation device 4 are connected by a pipe. During testing, the battery box to be tested and a standard component are simultaneously connected to the ventilation device 4 through the pipe. The air inlet device 3 filters the gas from the gas source and transports it to the ventilation device 4. The ventilation device 4 fills the battery box to be tested and the standard component with gas. After the pressure is balanced, the pressure decay value of the battery box to be tested is detected by a differential pressure sensor in the main body 1, with the standard component as a reference, so that the leakage rate of the battery box to be tested can be obtained. After the test is completed, the gas in the battery box to be tested and the standard component is discharged through the exhaust device 2.

[0034] The exhaust device 2 includes a pulse dehydration component 21 and a dirt removal component 23. The dirt removal component 23 is installed on one side of the main body 1. A backwash component 22 is installed on the dirt removal component 23. The backwash component 22 and the dirt removal component 23 are connected by a pipe. The gas discharged from the battery box and standard parts to be tested first enters the dirt removal component 23. The dirt removal component 23 removes large impurities in the airflow, while small impurities are blocked by the backwash component 22. The pulse dehydration component 21 collects water vapor in the airflow together and generates a pulse airflow at the end of the exhaust to assist in the exhaust. At the same time, it sucks away the accumulated water droplets to prevent impurities in the airflow from clogging the pipe.

[0035] The pulse dewatering assembly 21 includes an air supply box 211, which is mounted on the main body 1. A trigger element 212 is installed on one side of the air supply box 211, and the trigger element 212 is connected to the air supply box 211 via a pipe. The trigger element 212 is also connected to the backwash assembly 22 via a pipe. A pressure relief element 213 is installed on one side of the trigger element 212. A water collection element 214 is installed inside the air supply box 211, and a debris removal assembly 23 is installed on one side of the air supply box 211. When gas enters the water collection element 214, the water collection element 214 accumulates water vapor in the airflow. Then, the airflow enters the air supply box 211 and is discharged from the air supply box 211. At the end of the exhaust phase, the exhaust pressure decreases, and the trigger element 212 assists in exhausting the pulsed airflow discharged from the air supply box 211, while simultaneously sucking away and discharging the water droplets accumulated in the water collection element 214.

[0036] The backwash assembly 22 includes an air jet element 221, which is installed within the impurity removal assembly 23. An energy storage element 222 is installed on one side of the air jet element 221, and the air jet element 221 and the energy storage element 222 are connected by a pipe. When the trigger element 212 discharges a pulsed airflow, it simultaneously charges the energy storage element 222 with airflow. When the venting ends, the energy storage element 222 discharges the charged gas into the air jet element 221.

[0037] The air supply box 211 includes a connecting box 2111. An exhaust tailpipe 2112 is installed on one side of the connecting box 2111, and the exhaust tailpipe 2112 is mounted on the main body 1. A connecting groove is provided inside the connecting box 2111. An inclined groove 2114 and a first air inlet groove 2113 are installed on the connecting box 2111, and the inclined groove 2114 and the first air inlet groove 2113 communicate with the connecting groove. A water collection element 214 is installed on the other side of the connecting box 2111. During exhaust, gas enters the connecting groove from the water collection element 214 and is discharged from the connecting groove into the exhaust tailpipe 2112. At the same time, gas enters the trigger element 212 from the first air inlet groove 2113.

[0038] The trigger element 212 includes a trigger housing 2121, which is mounted on a connecting box 2111. An intake chamber 2122 and an exhaust chamber 2123 are provided inside the trigger housing 2121. A piston 2124 is slidably mounted between the intake chamber 2122 and the exhaust chamber 2123. A throttling orifice is provided on the piston 2124. A first elastic element 2126 is mounted on one side of the piston 2124, with one end of the first elastic element 2126 mounted on the exhaust chamber 2123. A connecting post is mounted on the other side of the piston 2124. A blocking plate 2125 is installed on the side. A second air inlet groove and a first air chamber 2127 are provided on the air inlet chamber 2122. The second air inlet groove and the first air inlet groove 2113 are connected. A first one-way valve is installed in the second air inlet groove. The blocking plate 2125 slides in the first air chamber 2127. A converging chamber is installed on one side of the first air chamber 2127. A throat chamber 2128 is installed on one side of the converging chamber. A expanding chamber is installed on one side of the throat chamber 2128. A second air chamber 2129 is installed on one side of the expanding chamber. The second air chamber 2129 is connected to the inclined groove 2114.

[0039] The first elastic element 2126 is the first spring. During normal exhaust, the airflow enters the second air intake groove through the first air intake groove 2113, enters the intake chamber 2122 from the second air intake groove, and then enters the exhaust chamber 2123 through the throttle orifice. When the air pressure in the exhaust chamber 2123 is higher than the threshold, the pressure relief element 213 releases the pressure in the exhaust chamber 2123. At this time, the piston 2124 drives the connecting column to move closer to the pressure relief element 213, and the connecting column drives the air blocking plate 2125 to move closer to the pressure relief element 213. Because the air pressure in the intake chamber 2122 is high during normal exhaust, the air replenishment speed of the throttle orifice to the exhaust chamber 2123 is fast. The air replenishment speed is faster than the pressure relief speed. The pressure difference between the intake chamber 2122 and the exhaust chamber 2123 is small. The piston 2124 cannot overcome the elastic force of the first spring to take the air blocking plate 2125 away from the first air chamber 2127. The gas in the intake chamber 2122 cannot enter the first air chamber 2127.

[0040] As exhaust reaches its final stage, the pressure in the intake chamber 2122 gradually decreases, and the air supply speed through the throttle orifice drops. Because the air supply speed is slower than the pressure relief speed, the pressure in the exhaust chamber 2123 decreases, and the pressure difference between the intake chamber 2122 and the exhaust chamber 2123 increases. The piston 2124 overcomes the spring force of the first spring and removes the air-blocking plate 2125 from the first air chamber 2127. At this moment, the high-pressure gas in the intake chamber 2122 is instantly discharged from the first air chamber 2127, passing sequentially through the converging chamber, the throat chamber 2128, and the expanding chamber. The second air chamber 2129 eventually discharges from the inclined groove 2114 into the connecting groove, forming a strong high-pressure pulse. After the pulse, the pressure in the intake chamber 2122 drops further, the pressure relief element 213 resets and closes, and the gas in the intake chamber 2122 is repressurized into the exhaust chamber 2123 through the throttle orifice. The air blocking plate 2125 re-closes the first air chamber 2127 and enters the next cycle. The above cycle is repeated at the end of the exhaust period, generating continuous high-pressure pulses until the exhaust pressure is insufficient to trigger again.

[0041] The pressure relief element 213 includes a pressure relief housing 2131, which is mounted on the trigger housing 2121. A pressure relief chamber 2132 is provided inside the pressure relief housing 2131. A first sliding block 2133 is slidably installed in the pressure relief chamber 2132. A second sliding block 2134 is installed on one side of the first sliding block 2133 and slides in the exhaust chamber 2123. A second elastic element 2135 is installed on the other side of the first sliding block 2133. One end of the second elastic element 2135 is installed on the pressure relief chamber 2132. A pressure relief pipe 2136 is installed on the pressure relief chamber 2132. The second elastic element 2135 is a second spring. When the pressure in the exhaust chamber 2123 reaches the threshold, the air pressure drives the second sliding block 2134 to move away from the trigger housing 2121. The second sliding block 2134 drives the first sliding block 2133 to move away from the trigger housing 2121. The airflow enters the pressure relief chamber 2132 until the gas in the pressure relief chamber 2132 enters the pressure relief pipe 2136 and is discharged.

[0042] The water collection element 214 includes a water collection pipe 2141, which is installed on the connecting box 2111. A separation cylinder 2142 is installed inside the water collection pipe 2141, and a spiral blade 2143 is installed inside the separation cylinder 2142. An annular water collection groove 2144 is provided on the inner wall of the water collection pipe 2141, and a suction pipe 2145 is installed on the annular water collection groove 2144. The suction pipe 2145 and the throat cavity 2128 are connected by a pipe. When gas enters the water collection pipe 2141, the airflow rotates as it passes through the spiral blades 2143. Under the action of centrifugal force, the droplets in the airflow are thrown against the wall of the water collection pipe 2141 to form a water film, which flows along the wall until it accumulates in the annular water collection tank 2144. When the pulse exhaust occurs, the airflow passes through the throat cavity 2128 to form a negative pressure, which draws the water film in the annular water collection tank 2144 from the suction pipe 2145 into the throat cavity 2128, and then discharges it from the second air chamber 2129 along with the airflow.

[0043] The jet element 221 includes an exhaust pipe 2211, which is installed on the water collection pipe 2141. A filter plate 2212 is installed inside the exhaust pipe 2211, and an exhaust ring 2213 is installed on one side of the filter plate 2212. The exhaust ring 2213 has exhaust holes, and the exhaust ring 2213 is connected to the energy storage element 222 through a pipe. When the airflow passes through the exhaust pipe 2211, small impurities in the airflow are blocked by the filter plate 2212. After the exhaust is completed, the energy storage element 222 charges the exhaust ring 2213 with gas, and the exhaust ring 2213 sprays gas through the exhaust holes to the back of the filter plate 2212, blowing off the impurities attached to the filter plate 2212 and preventing them from affecting the airflow.

[0044] The energy storage element 222 includes an energy storage box 2221, which is installed on a water collection pipe 2141. An energy storage plate 2222 is slidably installed inside the energy storage box 2221. A detection column 2223 is installed on one side of the energy storage plate 2222 and is located inside the water collection pipe 2141. A limit ring 2224 is installed inside the energy storage box 2221. A third elastic element 2225 is installed on the energy storage plate 2222 and one end of the third elastic element 2225 is installed inside the energy storage box 2221. An air filling pipe 2227 is installed on one side of the energy storage box 2221 and is connected to the first air chamber 2127 through a pipe. An air blowing pipe 2226 is installed on the other side of the energy storage box 2221 and is connected to the air jet ring 2213 through a pipe. The third elastic element 2225 is the third spring. An overflow valve is installed on the energy storage box 2221. When the pulse airflow passes through the first air chamber 2127, the airflow enters the energy storage box 2221 from the air charging pipe 2227. The detection column 2223 senses the air pressure in the water collection pipe 2141. When the air pressure in the energy storage box 2221 reaches the threshold, it is discharged from the overflow valve. When the exhaust stops, the exhaust pressure in the water collection pipe 2141 returns to zero. The energy storage plate 2222 moves towards the water collection pipe 2141. The airflow in the energy storage box 2221 enters the jet ring 2213 from the air blowing pipe 2226.

[0045] The air intake device 3 includes a filter 31, which is installed on the main body 1. A solenoid valve 32 is installed on one side of the filter 31. The filter 31 and the solenoid valve 32 are connected by a pipe. The solenoid valve 32 and the filter 31 are connected to the control system. The gas from the air source enters the filter 31, and the filter 31 filters the impurities in the gas before it enters the solenoid valve 32.

[0046] The ventilation device 4 includes a test pipe 41 and a standard pipe 42, which are mounted on the main body 1 and connected to the solenoid valve 32 via pipes. Gas from the solenoid valve 32 enters the test pipe 41 and the standard pipe 42, respectively filling the battery box and the standard component to be tested.

[0047] like Figure 10 The second embodiment of the present invention, shown, provides a purification component 23 that differs from that of the first embodiment. The difference lies in the change of the recycling method of the purification component 23. During exhaust, the airflow containing impurities enters the purification component 23 tangentially and rotates. Large impurities are thrown to the bottom of the purification component 23 by centrifugal force. During exhaust, the pressure inside the cavity increases, and the pressure difference causes the baffle block 233 to block the discharge port. After exhaust ends and the pipeline pressure returns to zero, the spring pulls open the baffle block 233, and the accumulated impurities automatically fall and are discharged under gravity. This achieves automatic cleaning and recycling of impurities after exhaust.

[0048] The specific contents are as follows: The impurity removal component 23 includes a centrifuge cylinder 231, which is installed on the air outlet pipe 2211. A tangential exhaust pipe 232 is installed on the centrifuge cylinder 231. A collection box is installed on one side of the centrifuge cylinder 231. A conical groove is provided inside the collection box. A collection groove 236 is installed on one side of the conical groove. A baffle block 233 is slidably installed inside the conical groove. A conical block 234 is installed on the baffle block 233. A guide post is installed on one side of the conical block 234. A limit plate is installed on one side of the guide post. A support cylinder 237 is installed on the centrifuge cylinder 231. The limit plate slides inside the support cylinder 237. A fourth elastic element 235 is installed on one side of the limit plate. One end of the fourth elastic element 235 is installed on the support cylinder 237. The fourth elastic element 235 is the fourth spring. An exhaust valve is installed at one end of the tangential exhaust pipe 232. The exhaust valve is connected to the control system. When exhausting, the exhaust valve is opened and the gas enters the centrifuge cylinder 231 from the tangential exhaust pipe 232. Large impurities in the airflow accumulate on the surface of the conical block 234. The air pressure presses the baffle block 233 into the conical groove. The separated airflow enters the exhaust pipe 2211. When exhausting stops, the fourth spring resets and moves the limiting plate away from the conical groove. The limiting plate moves the guide column away from the conical groove. The guide column moves the conical block 234 away from the conical groove. The conical block 234 moves the baffle block 233 away from the conical groove. The impurities accumulated on the conical block 234 fall into the collection tank 236.

[0049] Working principle of the invention:

[0050] During testing, the battery box to be tested and the standard component are simultaneously connected to the ventilation device 4 through the pipeline. The gas from the gas source enters the filter 31, and the filter 31 filters out impurities in the gas before it enters the solenoid valve 32. The gas in the solenoid valve 32 enters the test pipeline 41 and the standard pipeline 42, respectively filling the battery box to be tested and the standard component. After the pressure is balanced, the differential pressure sensor in the main body 1, with the standard component as a reference, detects the pressure drop value of the battery box to be tested, and the leakage rate of the battery box to be tested can be obtained.

[0051] After the test is completed, the exhaust valve is opened, and the gas in the battery box and standard parts to be tested enters the centrifuge cylinder 231 through the tangential exhaust pipe 232. Large impurities in the airflow accumulate on the surface of the conical block 234. The air pressure presses the baffle block 233 into the conical groove. The separated airflow enters the exhaust pipe 2211. When the exhaust stops, the fourth spring resets and moves the limit plate away from the conical groove. The limit plate moves the guide column away from the conical groove. The guide column moves the conical block 234 away from the conical groove. The conical block 234 moves the baffle block 233 away from the conical groove. The impurities accumulated on the conical block 234 fall into the collection tank 236.

[0052] When the airflow passes through the outlet pipe 2211, small impurities in the airflow are blocked by the filter plate 2212. Then the gas enters the water collection pipe 2141. When the airflow passes through the spiral blade 2143, it rotates. The droplets in the airflow are thrown against the wall of the water collection pipe 2141 under the action of centrifugal force to form a water film, which flows along the wall until it flows into the annular water collection tank 2144 and accumulates.

[0053] Gas enters the connecting groove from the water collection pipe 2141 and is discharged from the connecting groove into the exhaust tailpipe 2112. Simultaneously, gas enters the second air intake groove from the first air intake groove 2113, then enters the air intake chamber 2122 from the second air intake groove, and then enters the exhaust chamber 2123 through the throttle orifice. When the gas pressure in the exhaust chamber 2123 exceeds the threshold, the gas pressure drives the second sliding block 2134 to move away from the trigger housing 2121. The second sliding block 2134 drives the first sliding block 2133 to move away from the trigger housing 2121, and the airflow enters the pressure relief chamber 2132 until the gas in the pressure relief chamber 2132... The gas enters the pressure relief pipe 2136 and is discharged. At this time, the piston 2124 drives the connecting column to move closer to the pressure relief element 213. The connecting column drives the air blocking plate 2125 to move closer to the pressure relief element 213. During normal exhaust, the air pressure in the intake chamber 2122 is high, and the speed of air replenishment from the throttle orifice to the exhaust chamber 2123 is fast. The replenishment speed is faster than the pressure relief speed. The pressure difference between the intake chamber 2122 and the exhaust chamber 2123 is small. The piston 2124 cannot overcome the elastic force of the first spring to carry the air blocking plate 2125 away from the first air chamber 2127. The gas in the intake chamber 2122 cannot enter the first air chamber 2127.

[0054] As exhaust reaches its final stage, the pressure in the intake chamber 2122 gradually decreases, and the air supply speed through the throttle orifice drops. Because the air supply speed is slower than the pressure relief speed, the pressure in the exhaust chamber 2123 decreases, and the pressure difference between the intake chamber 2122 and the exhaust chamber 2123 increases. The piston 2124 overcomes the spring force of the first spring and removes the air-blocking plate 2125 from the first air chamber 2127. At this moment, the high-pressure gas in the intake chamber 2122 is instantly discharged from the first air chamber 2127, passing sequentially through the converging chamber, the throat chamber 2128, and the expanding chamber. The second air chamber 2129 eventually discharges from the inclined groove 2114 into the connecting groove, forming a strong high-pressure pulse. After the pulse, the pressure in the intake chamber 2122 drops further, the pressure relief element 213 resets and closes, and the gas in the intake chamber 2122 is repressurized into the exhaust chamber 2123 through the throttle orifice. The air blocking plate 2125 re-closes the first air chamber 2127 and enters the next cycle. The above cycle is repeated at the end of the exhaust period, generating continuous high-pressure pulses until the exhaust pressure is insufficient to trigger again.

[0055] When the pulsed exhaust occurs, the airflow creates negative pressure in the throat cavity 2128, drawing the water film in the annular water collection tank 2144 from the suction pipe 2145 into the throat cavity 2128. The water is then discharged from the second air cavity 2129 along with the airflow. Simultaneously, as the pulsed airflow passes through the first air cavity 2127, the airflow enters the energy storage tank 2221 from the inflation pipe 2227. The detection column 2223 senses the air pressure in the water collection pipe 2141. When the air pressure in the energy storage tank 2221 reaches the threshold, it is discharged from the overflow valve. When the exhaust stops, the exhaust pressure in the water collection pipe 2141 returns to zero, and the energy storage plate 2222 moves towards the water collection pipe 2141. The airflow in the energy storage tank 2221 enters the jet ring 2213 from the blowing pipe 2226. The jet ring 2213 sprays air through the jet holes onto the back of the filter plate 2212, blowing off the attached impurities on the filter plate 2212 to prevent them from affecting the airflow.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A sealing performance testing device for a battery box, characterized in that: Includes a main body (1), an air intake device (3) is installed on one side of the main body (1), an exhaust device (2) is installed on one side of the air intake device (3), and a ventilation device (4) is installed on the other side of the air intake device (3). The air intake device (3) and the ventilation device (4) are connected by a pipe. The exhaust device (2) includes a pulse dewatering component (21) and a dirt removal component (23). The dirt removal component (23) is installed on one side of the main body (1). A backwashing component (22) is installed on the dirt removal component (23). The backwashing component (22) and the dirt removal component (23) are connected by a pipe. The pulse dewatering assembly (21) includes an air supply box (211), which is installed on the main body (1). A trigger element (212) is installed on one side of the air supply box (211). The trigger element (212) is connected to the air supply box (211) through a pipe. The trigger element (212) is connected to the backwash assembly (22) through a pipe. A pressure relief element (213) is installed on one side of the trigger element (212). A water collection element (214) is installed inside the air supply box (211). The impurity removal assembly (23) is installed on one side of the air supply box (211).

2. The sealing performance testing device for a battery box according to claim 1, characterized in that: The backwashing assembly (22) includes an air jet element (221), which is installed inside the impurity removal assembly (23). An energy storage element (222) is installed on one side of the air jet element (221), and the air jet element (221) and the energy storage element (222) are connected by a pipe.

3. The sealing performance testing device for a battery box according to claim 2, characterized in that: The air supply box (211) includes a connecting box (2111), an exhaust tailpipe (2112) is installed on one side of the connecting box (2111), the exhaust tailpipe (2112) is installed on the main body (1), a connecting groove is provided inside the connecting box (2111), an inclined groove (2114) and a first air inlet groove (2113) are installed on the connecting box (2111), the inclined groove (2114) and the first air inlet groove (2113) are connected to the connecting groove, and the water collection element (214) is installed on the other side of the connecting box (2111).

4. The sealing performance testing device for a battery box according to claim 3, characterized in that: The triggering element (212) includes a trigger housing (2121), which is mounted on a connecting box (2111). An intake chamber (2122) and an exhaust chamber (2123) are provided inside the trigger housing (2121). A piston (2124) is slidably mounted between the intake chamber (2122) and the exhaust chamber (2123). A throttling orifice is provided on the piston (2124). A first elastic element (2126) is mounted on one side of the piston (2124), and one end of the first elastic element (2126) is mounted on the exhaust chamber (2123). A connecting post is mounted on the other side of the piston (2124). A blocking plate (2125) is installed on one side of the connecting column. A second air inlet groove and a first air chamber (2127) are provided on the air inlet chamber (2122). The second air inlet groove and the first air inlet groove (2113) are connected. A first one-way valve is installed in the second air inlet groove. The blocking plate (2125) slides in the first air chamber (2127). A tapering chamber is installed on one side of the first air chamber (2127). A throat chamber (2128) is installed on one side of the tapering chamber. A expanding chamber is installed on one side of the throat chamber (2128). A second air chamber (2129) is installed on one side of the expanding chamber. The second air chamber (2129) is connected to the inclined groove (2114).

5. A sealing performance testing device for a battery box according to claim 4, characterized in that: The pressure relief element (213) includes a pressure relief housing (2131), which is mounted on a trigger housing (2121). A pressure relief chamber (2132) is provided inside the pressure relief housing (2131). A first sliding block (2133) is slidably installed inside the pressure relief chamber (2132). A second sliding block (2134) is installed on one side of the first sliding block (2133). The second sliding block (2134) slides in the exhaust chamber (2123). A second elastic element (2135) is installed on the other side of the first sliding block (2133). One end of the second elastic element (2135) is installed on the pressure relief chamber (2132). A pressure relief pipe (2136) is installed on the pressure relief chamber (2132).

6. A sealing performance testing device for a battery box according to claim 5, characterized in that: The water collection element (214) includes a water collection pipe (2141), which is installed on a connecting box (2111). A separation cylinder (2142) is installed inside the water collection pipe (2141), and a spiral blade (2143) is installed inside the separation cylinder (2142). An annular water collection groove (2144) is provided on the inner wall of the water collection pipe (2141), and a suction pipe (2145) is installed on the annular water collection groove (2144). The suction pipe (2145) and the throat cavity (2128) are connected by a pipe.

7. A sealing performance testing device for a battery box according to claim 6, characterized in that: The jet element (221) includes an air outlet pipe (2211), which is installed on a water collection pipe (2141). A filter plate (2212) is installed inside the air outlet pipe (2211). An air outlet ring (2213) is installed on one side of the filter plate (2212). An air outlet hole is installed on the air outlet ring (2213). The air outlet ring (2213) is connected to the energy storage element (222) through a pipe.

8. A sealing performance testing device for a battery box according to claim 7, characterized in that: The energy storage element (222) includes an energy storage tank (2221), which is installed on a water collection pipe (2141). An energy storage plate (2222) is slidably installed inside the energy storage tank (2221). A detection column (2223) is installed on one side of the energy storage plate (2222), which is located inside the water collection pipe (2141). A limit ring (2224) is installed inside the energy storage tank (2221). The energy storage plate (2222) 2) A third elastic element (2225) is installed on the upper part. One end of the third elastic element (2225) is installed inside the energy storage box (2221). An air filling pipe (2227) is installed on one side of the energy storage box (2221). The air filling pipe (2227) and the first air chamber (2127) are connected by a pipe. An air blowing pipe (2226) is installed on the other side of the energy storage box (2221). The air blowing pipe (2226) and the air jet ring (2213) are connected by a pipe.

9. A sealing performance testing device for a battery box according to any one of claims 1-8, characterized in that: The impurity removal component (23) includes a centrifuge cylinder (231), which is mounted on an exhaust pipe (2211). A tangential exhaust pipe (232) is mounted on the centrifuge cylinder (231). A collection box is mounted on one side of the centrifuge cylinder (231). A conical groove is provided inside the collection box. A collection groove (236) is mounted on one side of the conical groove. A baffle block (233) is slidably mounted inside the conical groove. A conical block (234) is mounted on the baffle block (233). A guide post is mounted on one side of the conical block (234). A limit plate is mounted on one side of the guide post. A support cylinder (237) is mounted on the centrifuge cylinder (231). The limit plate slides inside the support cylinder (237). A fourth elastic element (235) is mounted on one side of the limit plate. One end of the fourth elastic element (235) is mounted on the support cylinder (237).

10. A sealing performance testing device for a battery box according to claim 1, characterized in that: The air intake device (3) includes a filter (31), which is installed on the main body (1). A solenoid valve (32) is installed on one side of the filter (31). The filter (31) and the solenoid valve (32) are connected by a pipe. The solenoid valve (32) and the filter (31) are connected to the control system. The ventilation device (4) includes a test pipe (41) and a standard pipe (42), which are installed on the main body (1). The test pipe (41) and the standard pipe (42) are connected to the solenoid valve (32) through pipes.

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