Explosion-proof valve detection system and operation method of explosion-proof valve detection process

Abstract

The invention discloses an explosion-proof valve detection system and an operation method of an explosion-proof valve detection process, and relates to the technical field of battery pack test equipment, the explosion-proof valve detection system comprises a target explosion-proof valve, a negative pressure device, an air supply device and an explosion-proof valve tool; the anti-explosion valve tool comprises a sealing cover, an adsorption piece and a first driving piece. The sealing cover covers one end, provided with the valve cover, of the target anti-explosion valve; the adsorption piece is arranged in the sealing cover and is connected with the negative pressure device; the negative pressure device is used for sucking the adsorption part so that the adsorption part adsorbs the valve cover under the action of negative pressure; the first driving part is in transmission connection with the adsorption part and drives the adsorption part to move relative to the sealing cover, so that the adsorption part drives the valve cover to open; the air supply device inflates the inner cavity of the sealing cover when the valve cover is opened so as to carry out an air tightness test. According to the scheme, under the condition that no iron sheet is arranged in the valve cover and the valve cover is made of a non-metal material, opening and closing of the valve cover can be conveniently achieved in a negative pressure adsorption mode so as to inflate the interior of the target anti-explosion valve, and an air tightness test can be efficiently carried out.

Description

Technical Field

[0001] The present application relates to the technical field of battery pack testing equipment, and in particular to an explosion-proof valve detection system and an operating method of an explosion-proof valve detection process. Background Art

[0002] One of the cores of new energy electric vehicles is the battery pack. As the main power source of new energy electric vehicles, the performance of the battery pack is one of the factors affecting the quality of new energy electric vehicles. After the battery pack is assembled, it is necessary to conduct an airtightness test on the battery pack to ensure the safety and reliability of the battery pack.

[0003] The battery pack is equipped with an explosion-proof valve, which is used to provide a safe pressure release channel when the internal pressure of the battery pack rises abnormally. In the process of airtightness testing of the battery pack, it is necessary to use the test fixture to open and close the valve cover of the explosion-proof valve by magnetic attraction to inflate the battery pack. As the battery pack develops in the direction of lightweight design, the valve cover of the explosion-proof valve has gradually begun to eliminate the iron sheet. As a result, the existing test fixture can no longer open and close the valve cover by adsorbing the valve cover through magnetic parts, and manual intervention is required, which is extremely inconvenient to use. Summary of the invention

[0004] The main purpose of the present application is to provide an explosion-proof valve detection system, which aims to solve the technical problem that the existing explosion-proof valve airtightness testing tooling cannot open and close the valve cover by adsorbing the valve cover through magnetic parts, making it difficult to inflate the battery pack and complete the airtightness test.

[0005] To achieve the above-mentioned purpose, the explosion-proof valve detection system proposed in the present application includes a target explosion-proof valve, a negative pressure device, an air supply device and an explosion-proof valve tooling; the explosion-proof valve tooling includes: A sealing cover, the sealing cover is arranged at one end of the target explosion-proof valve where a valve cover is arranged; An adsorbent, the adsorbent is disposed in the sealing cover, and the adsorbent is connected to the negative pressure device; the negative pressure device is used to perform a suction operation on the adsorbent, so that the adsorbent adsorbs the valve cover under the action of negative pressure; a first driving member, the first driving member being in driving connection with the adsorption member; the first driving member being used to drive the adsorption member to move relative to the sealing cover so that the adsorption member contacts the valve cover and drives the valve cover to open; The air supply device is connected to the sealing cover, and is used to inflate the inner cavity of the sealing cover to perform an air tightness test when the valve cover is opened.

[0006] The explosion-proof valve detection system provided in the present application can, after the sealing cover is set on the end of the target explosion-proof valve where the valve cover is provided, drive the adsorption member to contact the valve cover through the first driving member, and then make the adsorption member and the valve cover attracted to each other through the negative pressure suction effect, and then the first driving member drives the adsorption member to move in the direction away from the target explosion-proof valve to drive the valve cover attracted on the adsorption member to open, and then inflate the interior of the valve body of the target explosion-proof valve for subsequent air tightness test; and if it is necessary to close the valve cover, it is only necessary to stop the negative pressure suction operation on the adsorption member, separate the valve cover from the adsorption member and re-cover it on the valve body; based on the above-mentioned arrangement, when there is no iron sheet inside the valve cover and the valve cover is made of non-metallic material, the opening and closing of the valve cover can be conveniently realized by negative pressure adsorption, so that the air tightness test can be carried out smoothly and efficiently.

[0007] In some embodiments, the explosion-proof valve tooling further includes a fixing bracket, the fixing bracket being used to be fixedly connected to a valve body of the target explosion-proof valve, and the sealing cover is movably connected to the fixing bracket.

[0008] The fixed bracket can guide the movement of the sealing cover.

[0009] In some embodiments, the explosion-proof valve tooling also includes a second driving member, which is transmission-connected to the sealing cover; the second driving member is used to drive the sealing cover to move along a first direction so that the sealing cover covers or moves away from one end of the target explosion-proof valve where the valve cover is provided.

[0010] The second driving member can drive the sealing cover to move relative to the fixed bracket to make room for the explosion-proof valve, making it easier to assemble the explosion-proof valve and the fixed bracket. At the same time, the first driving member and the second driving member can respectively control the movement of the adsorption member and the sealing cover to ensure that the adsorption member can maintain contact with the valve cover when the valve cover needs to be opened.

[0011] In some embodiments, a flexible buffer layer is provided at the opening of the sealing cover; when the sealing cover is provided at one end of the target explosion-proof valve provided with the valve cover, the flexible buffer layer is used to fit with the target explosion-proof valve.

[0012] By arranging a flexible buffer layer at the opening of the sealing cover, the flexible buffer layer can be used to play an isolation and buffering role, which can effectively alleviate the impact and wear caused by the contact between the sealing cover and the target explosion-proof valve.

[0013] In some embodiments, the explosion-proof valve tooling further includes an inflation pipe, one end of which is connected to the inner cavity of the sealing cover, and the other end of which is used to connect to an air supply device.

[0014] By setting up the inflation pipe and the air supply device, the explosion-proof valve tooling can not only realize the opening and closing of the valve cover, but also complete the inflation operation of the battery pack, thereby further improving the convenience and efficiency of the air tightness test.

[0015] In some embodiments, the explosion-proof valve tooling also includes a first guide rod, which is slidably arranged in the sealing cover along a first direction, one end of the first guide rod is connected to the adsorption member, and the other end of the first guide rod is connected to the first driving member; the first driving member is used to drive the first guide rod to move along the first direction to drive the adsorption member to move.

[0016] The first driving member can drive the adsorption member to move via the first guide rod, thus reducing the difficulty of driving the adsorption member to move by the first driving member.

[0017] In some embodiments, the explosion-proof valve tooling further includes a first elastic member, the first elastic member is sleeved on the first guide rod, and the first elastic member is elastically supported between the adsorption member and the sealing cover.

[0018] The first elastic member can provide an elastic force to the adsorption member to ensure that the adsorption member can be firmly abutted against the valve cover.

[0019] In some embodiments, the explosion-proof valve tooling further includes a second driving member and a second guide rod, wherein the second driving member is in driving connection with the sealing cover; the second driving member is used to drive the sealing cover to move along a first direction so that the sealing cover covers or moves away from an end of the target explosion-proof valve provided with the valve cover; The second guide rod is slidably arranged in the fixed bracket along the first direction, one end of the second guide rod is connected to the sealing cover, and the other end of the second guide rod is connected to the second driving member; the second driving member is used to drive the second guide rod to move along the first direction to drive the sealing cover to move.

[0020] The second driving member can drive the sealing cover to move via the second guide rod, thereby reducing the difficulty of achieving the second driving member driving the sealing cover to move.

[0021] In some embodiments, the explosion-proof valve tooling further includes a second elastic member, the second elastic member is sleeved on the second guide rod, and the second elastic member is elastically supported between the sealing cover and the fixing bracket.

[0022] The second elastic member can provide an elastic force to the sealing cover so that the sealing cover can be firmly attached to one end of the fixing bracket.

[0023] In some embodiments, the second driving member includes a second cam portion and a second holding portion, the second cam portion is rotatably connected to the second guide rod around a second axis, the second cam portion abuts against the fixed bracket, and the second axis is perpendicular to the first direction; the second holding portion is connected to the second cam portion.

[0024] The tester can drive the sealing cover to move by manually rotating the second cam portion with the help of the second gripping portion, thereby reducing the operating difficulty of the tester.

[0025] In some embodiments, the explosion-proof valve tooling further includes a first guide rod, which is slidably disposed in the sealing cover along the first direction, one end of the first guide rod is connected to the adsorption member, and the other end of the first guide rod is connected to the first driving member; the first driving member is used to drive the first guide rod to move along the first direction to drive the adsorption member to move; The second guide rod is a hollow structure, and the first guide rod is slidably connected to the inner cavity of the second guide rod along the first direction.

[0026] The second guide rod can be used as an assembly base for the first guide rod, so that the overall structure of the explosion-proof valve tooling is more compact and occupies less space.

[0027] In some embodiments, the first driving member includes a first cam portion and a first holding portion, the first cam portion is rotatably connected to an end of the first guide rod facing away from the adsorption member around a first axis, the first cam portion abuts against the second guide rod, and the first axis is perpendicular to the first direction; the first holding portion is connected to the first cam portion.

[0028] The tester can drive the adsorption component to move by manually rotating the first cam portion with the help of the first gripping portion, thereby reducing the operating difficulty of the tester.

[0029] In some embodiments, the adsorption component is provided with an adsorption cavity, the first guide rod is provided with an adsorption channel, and the second guide rod is provided with a connecting channel; the adsorption cavity is used to be set toward the valve cover, one end of the adsorption channel is connected with the adsorption cavity, and the other end of the adsorption channel is connected with one end of the connecting channel, and the other end of the connecting channel is used to connect to a negative pressure device.

[0030] By setting up an auxiliary channel and a connecting channel, the connection between the external negative pressure device and the internal adsorption component can be achieved without affecting the basic structure and connection matching relationship of the first guide rod and the second guide rod, so that the negative pressure suction action of the adsorption component can be carried out normally.

[0031] In some embodiments, the explosion-proof valve tooling also includes a fixed bracket, which is used to be fixedly connected to the valve body of the target explosion-proof valve, and the sealing cover is movably connected to the fixed bracket; the first driving member and the second driving member are both arranged on the outside of the fixed bracket.

[0032] Based on the above design, the assembly of the first driving member and the second driving member can be made more convenient.

[0033] In some embodiments, the fixed bracket includes a top wall and a side wall, the side wall is arranged around the periphery of the top wall to form a accommodating cavity, the sealing cover is arranged in the accommodating cavity, and the accommodating cavity is used to accommodate at least a portion of the target explosion-proof valve.

[0034] By configuring the fixing bracket to include a top wall and side walls, it is convenient to install the valve body of the target explosion-proof valve into the accommodating cavity of the fixing bracket, thereby achieving connection between the target explosion-proof valve and the explosion-proof valve tooling.

[0035] In some embodiments, a limiting flange is protruding from an opening at one end of the side wall away from the top wall, and the limiting flange is used to snap-fit ​​into a limiting groove of the target explosion-proof valve.

[0036] Through the cooperation between the limiting flange and the limiting groove, the explosion-proof valve can be stably snap-fitted and assembled into the fixing bracket, thereby improving the tightness of the connection between the explosion-proof valve and the fixing bracket.

[0037] In some embodiments, the explosion-proof valve tooling also includes an inflation pipe, which is slidably arranged in the top wall along a first direction, one end of the inflation pipe is connected to the inner cavity of the sealing cover, and the other end of the inflation pipe is used to connect to an air supply device.

[0038] Since the sealing cover moves relative to the fixed bracket along the first direction, when the inflation pipe is slidably inserted into the top wall along the first direction, it can ensure that the air supply device can transport external gas to the inner cavity of the sealing cover through the inflation pipe while avoiding the inflation pipe from hindering the relative movement between the sealing cover and the fixed bracket.

[0039] In some embodiments, the negative pressure device is connected to the sealing cover, and the negative pressure device is used to draw out the gas in the inner cavity of the sealing cover.

[0040] Through the cooperation between the negative pressure device and the air supply device, the air supply operation and the exhaust operation of the sealing cover can be realized, so that the air pressure conditions in the inner cavity of the sealing cover can better meet the actual test requirements.

[0041] In some embodiments, the air supply device is connected to the adsorption member; the air supply device is used to inflate the adsorption member so that the adsorption member is separated from the valve cover under the action of positive pressure.

[0042] When the air supply device finishes inflating the battery pack and completes the testing of the sealing performance of the battery pack, the negative pressure device stops the negative pressure suction operation on the adsorbent. At this time, the adsorbent can be inflated again through the air supply device to ensure that the valve cover can be smoothly separated from the adsorbent through the positive pressure effect, and push the valve cover to be re-closed on the valve body.

[0043] In some embodiments, the explosion-proof valve detection system further includes a second pressure sensor, and the second pressure sensor is used to obtain a third pressure value in the connection passage between the negative pressure device and the adsorption member.

[0044] By setting a second pressure sensor to obtain a third pressure value in the connection path between the negative pressure device and the adsorbent, it is possible to judge whether the adsorbent is firmly attached to the valve cover and whether the adsorbent successfully drives the valve cover to open, etc., based on the size and change of the third pressure value during the negative pressure suction operation on the adsorbent by the negative pressure device; thereby helping testers to control the corresponding test links more intuitively and accurately, and to intervene in time when the third pressure value does not match the preset situation, so as to eliminate abnormalities and faults in a timely and accurate manner, and avoid affecting subsequent test processes.

[0045] In some embodiments, the explosion-proof valve detection system further includes a first pressure sensor, and the first pressure sensor is used to obtain a first pressure value in the connection passage between the air supply device and the sealing cover.

[0046] By setting a first pressure sensor to obtain a first pressure value in the connection passage between the air supply device and the sealing cover, it can be determined whether the sealing cover, the target explosion-proof valve, and the battery pack are leaking according to the size and change of the first pressure value during the process of inflating the inner cavity of the sealing cover through the air supply device, ensuring that the inflation operation is stopped only after the gas volume in the corresponding chamber reaches a preset value, thereby helping testers to control the corresponding test links more intuitively and accurately and improving the accuracy of the test results.

[0047] In some embodiments, the explosion-proof valve detection system further includes a first pressure sensor, and the first pressure sensor is used to obtain a second pressure value in the connection passage between the negative pressure device and the sealing cover.

[0048] By setting a first pressure sensor to obtain a second pressure value in the connecting passage between the negative pressure device and the sealing cover, it is possible to determine whether a gas leakage occurs based on the size and change of the second pressure value during the process of performing a negative pressure suction operation on the inner cavity of the sealing cover through the negative pressure device to empty the gas in the sealing cover, so as to stop the negative pressure suction operation only after ensuring that the gas in the sealing cover has been completely emptied. This can help testers to control the corresponding test links more intuitively and accurately, thereby improving the accuracy of the test results.

[0049] In some embodiments, the explosion-proof valve detection system further includes a second pressure sensor, and the second pressure sensor is used to obtain a fourth pressure value in the connection passage between the air supply device and the adsorption member.

[0050] By setting a second pressure sensor to obtain a fourth pressure value in the connecting passage between the air supply device and the adsorbent, it is possible to judge whether the valve cover has been successfully separated from the adsorbent based on the size and change of the fourth pressure value during the process of inflating the adsorbent through the air supply device to ensure that the valve cover is separated from the adsorbent. This can help testers to control the corresponding test links more intuitively and accurately and ensure the normal progress of the test process.

[0051] In some embodiments, the explosion-proof valve detection system further includes a pressure tester, and the pressure tester is used to obtain the pressure change of the inner cavity of the sealing cover within a preset time.

[0052] By setting up a pressure tester, the sealing performance of the battery pack and the sealing performance of the target explosion-proof valve itself can be tested.

[0053] The present application also proposes an operation method of an explosion-proof valve detection process, and the operation method of the explosion-proof valve detection process comprises the following steps: Driving the adsorption member to fit with the valve cover of the target explosion-proof valve, so that a first cavity is formed between at least a portion of the adsorption member and the valve cover; performing a suction operation on the first cavity; The adsorption member is driven to move, so as to drive the valve cover to open and expose the vent covered by the valve cover.

[0054] Based on the above arrangement, when no iron sheet is provided inside the valve cover and the valve cover is made of non-metallic material, the valve cover can be conveniently opened by negative pressure adsorption through the adsorption part, which provides convenience for subsequent inflation operation and air tightness detection process.

[0055] In some embodiments, after the step of performing the suction operation on the first cavity, the method for operating the explosion-proof valve detection process further includes the following steps: After completing the suction operation for a preset time, obtaining a third pressure value in the first cavity; The step of driving the adsorption member to move comprises: When the third pressure value is not greater than the first pressure threshold, driving the adsorption component to move; When the third pressure value is greater than the first pressure threshold, first abnormal prompt information is output.

[0056] After completing the suction operation for a preset time, it is determined whether the third pressure value is greater than the first pressure threshold value to determine whether an abnormal condition occurs. If there is no abnormal condition, it is determined that the adsorption component has been tightly attracted to the valve cover. At this time, the adsorption component can be driven to open the valve cover and perform subsequent testing procedures. If an abnormal condition occurs, the first abnormal prompt information can be output to remind the tester to check and adjust the assembly condition in time.

[0057] In some embodiments, after the step of driving the adsorption member to move so as to drive the valve cover to open and expose the vent covered by the valve cover, the operation method of the explosion-proof valve detection process further includes the following steps: When the third pressure value increases to a second pressure threshold, a second abnormal prompt message is output; and the second pressure threshold is greater than the first pressure threshold.

[0058] In the process of driving the adsorption part to move, whether the valve cover remains in contact with the adsorption part can be determined by judging whether the third pressure value increases to the second pressure threshold, thereby judging whether the adsorption part successfully drives the valve cover to open; if the adsorption part fails to drive the valve cover to open normally, the second abnormal prompt information is output to remind the test personnel to intervene in time so as not to affect the subsequent test process.

[0059] In some embodiments, after the step of driving the adsorption member to move so as to drive the valve cover to open and expose the vent covered by the valve cover, the operation method of the explosion-proof valve detection process further includes the following steps: The interior of the target explosion-proof valve is inflated through the vent.

[0060] Inflating the interior of the target explosion-proof valve through the vent port can provide a basis for the subsequent air tightness testing process.

[0061] In some embodiments, before the step of driving the adsorption component to fit the valve cover of the target explosion-proof valve, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve with a valve cover with a sealing cover; the adsorbent is arranged in the second cavity; The step of inflating the interior of the target explosion-proof valve through the vent includes: The second cavity is inflated with gas so that the inflated gas enters the interior of the target explosion-proof valve through the vent.

[0062] Based on the above arrangement, the air supply device can be integrated on the sealing cover without connecting the air supply device at the vent after the valve cover is opened, thereby further improving the convenience and efficiency of the air tightness test.

[0063] In some embodiments, the step of inflating the second cavity so that the inflated gas enters the interior of the target explosion-proof valve through the vent includes: Acquire a first pressure value of the second cavity; When the first pressure value reaches a third pressure threshold, the inflation into the second cavity is stopped.

[0064] By judging whether the first pressure value of the second cavity reaches the third pressure threshold, it can be accurately determined whether the inflation operation is completed; when it is confirmed that the inflation volume has reached the preset level, the inflation operation is stopped.

[0065] In some embodiments, after the step of inflating the second cavity so that the inflated gas enters the interior of the target explosion-proof valve through the vent, the operation method of the explosion-proof valve detection process further includes the following steps: Obtaining a first pressure change of the second cavity within a preset time; When the first pressure change reaches a first change threshold, a third abnormal prompt information is output.

[0066] After inflation is completed, under normal sealing conditions, the air pressure in the closed second cavity formed by the interior of the battery pack, the interior of the target explosion-proof valve, and the inner cavity of the sealing cover should not change significantly within a certain period of time. Based on this consideration, this embodiment detects the first pressure change in the second cavity within a preset time and makes a judgment. If the first pressure change reaches the first change threshold, it means that the air pressure in the second cavity has changed significantly, thereby determining that the battery pack may have an abnormal sealing condition and cause gas leakage, thereby promptly reminding the tester to intervene and handle the problem.

[0067] In some embodiments, before the step of obtaining the first pressure change of the second cavity within a preset time, the operation method of the explosion-proof valve detection process further includes the following steps: The target explosion-proof valve is left to stand for a preset time.

[0068] After the inflation is completed, the target explosion-proof valve is left to stand for a preset time to allow the airflow in the second cavity to stabilize and the air pressure to balance, and then the first pressure change is obtained, which can further improve the accuracy of the final airtightness test result.

[0069] In some embodiments, after the step of inflating the interior of the target explosion-proof valve through the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The suction operation on the adsorbent is stopped, so that the valve cover is separated from the adsorbent and is re-sealed on the vent.

[0070] After the inflation operation and the air tightness test operation are completed, the valve cover needs to be closed; at this time, stopping the suction operation on the adsorption part can make the valve cover lose the negative pressure effect, so that the valve cover can be re-closed on the target explosion-proof valve under the action of gravity or the force of other connecting devices (such as the elastic force of the spring), thereby realizing the automatic closing of the valve cover.

[0071] In some embodiments, the step of stopping the suction operation on the adsorbent, separating the valve cover from the adsorbent and resealing the vent includes: Inflate the adsorbent so that the valve cover is separated from the adsorbent under positive pressure and is re-sealed on the vent; The inflation operation of the adsorbent is stopped.

[0072] While stopping the negative pressure suction operation on the adsorption piece, the adsorption piece is inflated, so that the valve cover can be smoothly separated from the adsorption piece through the positive pressure, and the valve cover can be re-covered on the target explosion-proof valve under the positive pressure.

[0073] In some embodiments, before the step of driving the adsorption component to fit the valve cover of the target explosion-proof valve, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve with a valve cover with a sealing cover; the adsorbent is arranged in the second cavity; After the step of stopping the suction operation on the adsorbent, separating the valve cover from the adsorbent and resealing the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The gas in the second cavity is discharged outward.

[0074] When the valve cover is closed again, the interior of the battery pack and the interior of the target explosion-proof valve form a first closed chamber, and the inner cavity of the sealing cover forms a second cavity. When the sealing is normal (specifically, when the sealing between the valve cover and the valve body is normal), the first closed chamber and the second cavity are not connected to each other; at this time, the gas in the inner cavity of the sealing cover can be emptied (that is, the gas in the second cavity is discharged to the outside), so that an air pressure difference can be formed between the first closed chamber and the second cavity. Subsequently, by obtaining the air pressure changes of the first closed chamber and / or the second cavity, it can be determined whether there is gas exchange between the first closed chamber and the second cavity, thereby providing a basis for ultimately determining the sealing performance of the target explosion-proof valve.

[0075] In some embodiments, the step of discharging the gas in the second cavity to the outside includes: Acquire a second pressure value of the second cavity; When the second pressure value reaches a fourth pressure threshold, the gas in the second cavity is stopped from being discharged to the outside.

[0076] In the process of evacuating the gas in the second cavity, the gas pressure in the second cavity will gradually decrease; by obtaining the second pressure value of the second cavity and comparing it with the preset fourth pressure threshold, the exhaust operation can be stopped after ensuring that the gas in the second cavity has been evacuated to the preset level (that is, when the second pressure value reaches the fourth pressure threshold), thereby helping the tester to control the above exhaust process more accurately.

[0077] In some embodiments, before the step of driving the adsorption component to fit the valve cover of the target explosion-proof valve, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve with a valve cover with a sealing cover; the adsorbent is arranged in the second cavity, and the adsorption end of the adsorbent is communicated with the second cavity; After the step of stopping the suction operation on the adsorbent, separating the valve cover from the adsorbent and resealing the vent, the operation method of the explosion-proof valve detection process further includes the following steps: A suction operation is performed on the adsorbent to discharge the gas in the second cavity outward.

[0078] This embodiment provides another way to perform negative pressure suction operation on the inner cavity of the sealing cover; when the adsorption element is separated from the valve cover, the adsorption end of the adsorption element (specifically, it can be the adsorption cavity of the adsorption element) is connected to the inner cavity of the sealing cover. At this time, the adsorption element can be subjected to negative pressure suction operation through the negative pressure device to extract the gas in the inner cavity of the sealing cover outward through the adsorption element, thereby also realizing the emptying of the gas in the second cavity.

[0079] In some embodiments, the step of performing a suction operation on the adsorbent to discharge the gas in the second cavity to the outside includes: Acquiring a third pressure value of the suction channel of the adsorbent; When the third pressure value reaches a fourth pressure threshold, the suction operation on the adsorption element is stopped.

[0080] During the process of performing negative pressure suction operation on the adsorbent through the negative pressure device to empty the gas in the inner cavity of the sealing cover, the air pressure in the inner cavity of the sealing cover will gradually decrease. Since the adsorption end of the adsorbent (specifically, it can be the adsorption cavity of the adsorbent) is connected to the inner cavity of the sealing cover, the third pressure value in the connecting passage between the negative pressure device and the adsorbent (that is, the suction channel of the adsorbent mentioned above) will also gradually decrease; at this time, the above-mentioned third pressure value is obtained through the second pressure sensor, and it is possible to intuitively judge whether there is leakage during the suction process, and the negative pressure suction operation can be stopped after ensuring that the gas in the sealing cover has been emptied to a preset level (that is, when the third pressure value reaches the fourth pressure threshold), thereby helping the tester to more accurately control the above-mentioned negative pressure suction process.

[0081] In some embodiments, after the step of discharging the gas in the second cavity to the outside, the operation method of the explosion-proof valve detection process further includes the following steps: The target explosion-proof valve is left to stand for a preset time.

[0082] Since the gas is fluid, the airflow in the second cavity is still in an unstable state for a period of time after the gas in the second cavity is discharged. At this time, there may be deviations in the air pressure detection, which may lead to misjudgment. Based on this situation, this embodiment leaves the target explosion-proof valve still for a preset time after the exhaust is completed, so that the airflow in the second cavity tends to be stable and the air pressure tends to be balanced. Then, the pressure change of the second cavity can be detected by the pressure tester, which can further improve the accuracy of the final airtightness test result.

[0083] In some embodiments, after the step of discharging the gas in the second cavity to the outside, the operation method of the explosion-proof valve detection process further includes the following steps: Obtaining a second pressure change of the second cavity within a preset time; When the second pressure change reaches a second change threshold, fourth abnormal prompt information is output.

[0084] After the gas in the second cavity is emptied, the second pressure change in the second cavity within a preset time is obtained and judged. If the second pressure change reaches a second change threshold, it means that a sealing abnormality may occur at the connection between the valve cover and the valve body, thereby causing the gas in the first closed chamber to leak into the second cavity, causing the gas pressure in the second cavity to increase abnormally. At this time, the test personnel can be reminded to intervene in time, thereby achieving accurate detection of the sealing performance of the target explosion-proof valve itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0086] Figure 1 This is a schematic diagram of the three-dimensional structure of an explosion-proof valve tooling in an embodiment of an explosion-proof valve detection system of the present application; Figure 2 This is a schematic diagram of the cross-sectional structure when the adsorption component is not in contact with the valve cover in an embodiment of the explosion-proof valve detection system of the present application; Figure 3 This is a schematic diagram of the cross-sectional structure when the adsorption component contacts the valve cover in one embodiment of the explosion-proof valve detection system of the present application; Figure 4 This is a schematic cross-sectional structure diagram of an explosion-proof valve detection system in an embodiment of the present application when the adsorption member drives the valve cover to open; Figure 5 This is a schematic diagram of the connection structure when the adsorption member contacts the valve cover in one embodiment of the explosion-proof valve detection system of the present application; Figure 6 This is a schematic diagram of the connection structure when the adsorption member drives the valve cover to open in one embodiment of the explosion-proof valve detection system of the present application; Figure 7 This is a schematic diagram of the connection structure after the valve cover and the adsorption member are separated in one embodiment of the explosion-proof valve detection system of the present application; Figure 8 This is a flow chart of an embodiment of an operation method of an explosion-proof valve detection process of the present application.

[0087] Description of Figure Numbers: 1. Target explosion-proof valve; 101. Valve body; 102. Valve cover; 1011. Limiting groove; 2. Battery pack; 3. Sealing cover; 301. Flexible buffer layer; 4. Adsorption member; 401. Adsorption cavity; 5. first driving member; 501. first cam portion; 502. first gripping portion; 5011. second limiting surface; 5012. third limiting surface; 5013. fourth limiting surface; 6. Fixed bracket; 601. Top wall; 602. Side wall; 603. Accommodating cavity; 6021. Avoidance opening; 6022. Limiting flange; 7. Second driving member; 701. Second cam portion; 702. Second gripping portion; 8. Inflatable pipe; 9. Air supply device; 10. Negative pressure device; 11. first guide rod; 1101. adsorption channel; 12. a first elastic member; 13. second guide rod; 1301. connecting channel; 14. A second elastic member; 15. First pressure sensor; 16. Second pressure sensor; 17. Pressure tester; 18. First valve; 19. Second valve; 20. Third valve; 21. Fourth valve.

[0088] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0089] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0090] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0091] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0092] The battery pack includes a box body and a battery cell disposed in the box body. The box body is usually provided with an explosion-proof valve, which is a component that is actuated to release the internal pressure or temperature of the battery pack when the internal pressure or temperature reaches a predetermined threshold. When the internal pressure or temperature of the battery pack reaches the threshold, the explosion-proof valve is actuated to form an opening or channel for the internal pressure or temperature to be released.

[0093] The explosion-proof valve includes a valve body, a valve cover and a spring. The valve cover blocks the opening of the valve body under the action of the spring. When the pressure or temperature inside the battery pack reaches a threshold, the valve cover opens under the action of the pressure inside the battery pack, so that the opening of the valve body connects the inside of the battery pack with the outside to allow the internal pressure or temperature of the battery pack to be released.

[0094] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, new energy electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0095] After the battery pack is assembled, its air tightness needs to be tested to determine the waterproof and dustproof capabilities of the battery pack and ensure the safety and reliability of the battery pack. During the air tightness test of the battery pack, the explosion-proof valve cover needs to be opened and closed through the test tooling to inflate and seal the battery pack, so that the purpose of testing the air tightness of the battery pack can be achieved by testing the internal pressure of the battery pack.

[0096] Traditional explosion-proof valves have iron sheets inside the valve cover, and the test tool can use magnetic parts to absorb the iron sheet and then pull the valve cover to open and close the valve cover. However, as battery packs move towards lightweight design, the iron sheet inside the valve cover has gradually been eliminated, and the valve cover is made of non-metallic materials. As a result, the existing test tool can no longer absorb the valve cover through magnetic parts to open and close the valve cover, and manual intervention is required, which is extremely inconvenient to use.

[0097] Based on the above problems, in order to conveniently realize the opening and closing of the non-metallic valve cover during the air tightness test, the present application provides an explosion-proof valve detection system, please refer to Figures 1 to 5 The explosion-proof valve detection system includes a target explosion-proof valve 1, a negative pressure device 10, an air supply device 9 and an explosion-proof valve tooling; the explosion-proof valve tooling includes: A sealing cover 3, the sealing cover 3 is used to cover an end of the target explosion-proof valve 1 provided with a valve cover 102; The adsorption member 4 is disposed in the sealing cover 3 and is connected to the negative pressure device 10; the negative pressure device 10 is used to perform a suction operation on the adsorption member 4 so that the adsorption member 4 adsorbs the valve cover 102 under the action of negative pressure; A first driving member 5, the first driving member 5 is in driving connection with the adsorption member 4; the first driving member 5 is used to drive the adsorption member 4 to move relative to the sealing cover 3, so that the adsorption member 4 contacts the valve cover 102 and drives the valve cover 102 to open; The air supply device 9 is connected to the sealing cover 3 and is used to inflate the inner cavity of the sealing cover 3 to perform an air tightness test when the valve cover 102 is opened.

[0098] Specifically, the shape of the adsorption component 4 can be cylindrical, ring-shaped, rectangular, etc. The part of the adsorption component 4 used to contact the valve cover 102 constitutes the adsorption end, and the adsorption end may include one or more surfaces. The adsorption end can be connected to the external negative pressure device 10 through a corresponding pipe or channel to achieve adsorption of the valve cover 102 under the suction action of the negative pressure device 10; taking the channel as an example, a channel for gas circulation can be opened inside the adsorption component 4, one end of the channel is connected to the adsorption end, and the other end of the channel passes through the outside and is connected to the negative pressure device 10.

[0099] It should be noted that, driven by the first driving member 5 , the adsorption member 4 can move relative to the sealing cover 3 inside the sealing cover 3 , and the valve cover 102 will be opened only when the adsorption end of the adsorption member 4 contacts the top surface of the valve cover 102 .

[0100] The first driving member 5 can be a linear reciprocating driving member, such as a piston cylinder, a linear motor, etc. For example, the first driving member 5 is a piston cylinder, the piston rod of the piston cylinder is connected to a first adapter, the first adapter is arranged in the sealing cover 3 and one end of the first adapter is connected to the adsorption member 4, and the first adapter can be moved in the first direction (i.e. Figure 1 Thus, when the piston cylinder reciprocates, the adsorption member 4 can be driven to move through the first adapter.

[0101] The first driving member 5 can also be an eccentric cam, which is rotatably connected to a first adapter, which is inserted into the sealing cover 3 and one end of which is connected to the adsorption member 4, and the first adapter can be rotated in the first direction (i.e. Figure 1 Thus, when the eccentric cam rotates, the adsorption member 4 can be driven to move through the first adapter. It should be noted that the eccentric cam can be rotated by a driving device such as a motor, or can be rotated manually by a tester.

[0102] During the actual air tightness test, after the sealing cover 3 is covered on the end of the target explosion-proof valve 1 provided with the valve cover 102, the valve cover 102 is located in a closed chamber enclosed by the sealing cover 3 and the surface of the target explosion-proof valve 1; the first driving member 5 first drives the adsorption member 4 to contact the valve cover 102, and then the adsorption member 4 and the valve cover 102 are attracted to each other through the negative pressure suction effect, and the first driving member 5 then drives the adsorption member 4 to move away from the target explosion-proof valve 1 to drive the valve cover 102 attracted to the adsorption member 4 to open; when the valve cover 102 is opened, the valve body 101 of the target explosion-proof valve 1 can be inflated, so that the gas passes through the valve body 101 and is filled into the battery pack 2, and then the air tightness test can be carried out. It should be noted that the sealing cover 3 and the target explosion-proof valve 1 are sealed and connected. Therefore, when the valve cover 102 is opened, a closed chamber can be formed between the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1 and the inner cavity of the sealing cover 3. The airtightness test can be carried out after the inflation is completed and the valve cover 102 is opened. At this time, the sealing performance of the battery pack 2 is tested; or after the inflation is completed, the negative pressure suction operation on the adsorption component 4 is stopped, the valve cover 102 is separated from the adsorption component 4 and re-covered on the valve body 101, so that the interior of the battery pack 2 and the interior of the valve body 101 of the target explosion-proof valve 1 form a closed chamber, and the inner cavity of the sealing cover 3 also forms a closed chamber, and then the airtightness test is carried out. At this time, the sealing performance of the target explosion-proof valve 1 itself is tested; of course, in actual applications, the above two methods can also be used simultaneously for airtightness testing to obtain more comprehensive test results, which is not limited here.

[0103] It can be seen that the explosion-proof valve detection system provided in this embodiment, after the sealing cover 3 is set on the end of the target explosion-proof valve 1 provided with the valve cover 102, the first driving member 5 can drive the adsorption member 4 to contact the valve cover 102, and then the negative pressure suction effect of the negative pressure device 10 causes the adsorption member 4 to be attracted to the valve cover 102, and the first driving member 5 then drives the adsorption member 4 to move away from the target explosion-proof valve 1, so as to drive the valve cover 102 attracted to the adsorption member 4 to open, and then the target explosion-proof valve 1 can be moved to the target explosion-proof valve 1 through the air supply device 9. The valve body 101 of the explosion-proof valve 1 is inflated for subsequent air tightness testing; if it is necessary to close the valve cover 102, it is only necessary to stop the negative pressure suction operation on the adsorption component 4, separate the valve cover 102 from the adsorption component 4 and re-cover the valve body 101; based on the above arrangement, when no iron sheet is provided inside the valve cover 102 and the valve cover 102 is made of non-metallic material, the valve cover 102 can be opened and closed conveniently by negative pressure adsorption, so that the air tightness test can be carried out smoothly and efficiently.

[0104] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a fixed bracket 6, which is used to be fixedly connected to the valve body 101 of the target explosion-proof valve 1, and the sealing cover 3 can be movably connected to the fixed bracket 6.

[0105] The fixing bracket 6 can be fixedly connected to the valve body 101 by a spring clip, or by providing an opening for the valve body 101 to extend into and forming a block on the inner side of the opening that matches the outer edge of the valve body 101 to achieve fixed connection with the valve body 101.

[0106] The fixing bracket 6 can guide the movement of the sealing cover 3 .

[0107] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a second driving member 7, which is transmission-connected to the sealing cover 3; the second driving member 7 is used to drive the sealing cover 3 along the first direction (i.e. Figure 1 The sealing cover 3 is moved in the X direction as shown in the figure, so that the sealing cover 3 covers or moves away from the end of the target explosion-proof valve 1 provided with the valve cover 102.

[0108] The second driving member 7 can be a linear reciprocating driving member, such as a piston cylinder, a linear motor, etc. For example, the second driving member 7 is a piston cylinder, the piston rod of the piston cylinder is connected to a second adapter, the second adapter is inserted through the fixed bracket 6 and one end is connected to the sealing cover 3, and the second adapter can be moved in the first direction (i.e. Figure 1 The piston cylinder can move back and forth to drive the sealing cover 3 to move through the second adapter.

[0109] It should be noted that the first adapter and the second adapter may be coaxially arranged or non-coaxially arranged.

[0110] Exemplarily, the first adapter and the second adapter are coaxially arranged, the first adapter is inserted into the second adapter, the first driving member 5 is the first piston cylinder, the second driving member 7 is the second piston cylinder, the piston rod of the first piston cylinder is coaxial with the first adapter, and the piston rod of the second piston cylinder is located on one side of the piston rod of the first piston cylinder but is connected to the second adapter.

[0111] The second driving member 7 can also be an eccentric cam, which can be rotatably connected to a second adapter, which is inserted into the sealing cover 3 and connected to the sealing cover 3 at one end, and the second adapter can be rotated in the first direction (i.e. Figure 1 The eccentric cam can be rotated to drive the sealing cover 3 to move through the second adapter. It should be noted that the eccentric cam can be rotated by a driving device such as a motor, or it can be rotated manually by a tester.

[0112] Exemplarily, the first adapter and the second adapter are coaxially arranged, the first adapter is inserted into the second adapter, the first driving member 5 is a first eccentric cam, the second driving member 7 is a second eccentric cam, the first eccentric cam can be assembled to the top of the first adapter, and the second eccentric cam can be assembled to the outside of the second adapter to ensure that there is no interference between the first eccentric cam and the second eccentric cam when they rotate.

[0113] The second driving member 7 can drive the sealing cover 3 to move relative to the fixed bracket 6 to make room for the explosion-proof valve, making it more convenient to assemble the explosion-proof valve and the fixed bracket 6. At the same time, the first driving member 5 and the second driving member 7 can respectively control the movement of the adsorption member 4 and the sealing cover 3 to ensure that the adsorption member 4 can maintain contact with the valve cover 102 when the valve cover 102 needs to be opened.

[0114] In some embodiments, reference Figures 1 to 4 A flexible buffer layer 301 is provided at the opening of the sealing cover 3; when the sealing cover 3 is provided on one end of the target explosion-proof valve 1 provided with the valve cover 102, the flexible buffer layer 301 is used to fit with the target explosion-proof valve 1.

[0115] When the sealing cover 3 is driven by the second driving member 7 to cover the target explosion-proof valve 1, a certain impact may be generated between the opening of the sealing cover 3 and the surface of the target explosion-proof valve 1; in this embodiment, by providing a flexible buffer layer 301 at the opening of the sealing cover 3, the flexible buffer layer 301 can be used to play an isolation and buffering role, which can effectively alleviate the impact and wear caused by the contact between the sealing cover 3 and the target explosion-proof valve 1. Among them, the flexible buffer layer 301 can be a rubber layer, specifically, it can be an annular rubber structure arranged around the opening of the sealing cover 3.

[0116] In some embodiments, reference Figures 1 to 4The explosion-proof valve tooling also includes an inflation pipe 8, one end of the inflation pipe 8 is connected to the inner cavity of the sealing cover 3, and the other end of the inflation pipe 8 is used to connect to the air supply device 9.

[0117] During the air tightness test, after the adsorbent 4 drives the valve cover 102 to open, the air supply device 9 can supply gas to the inner cavity of the sealing cover 3 through the inflation pipe 8. Since a closed chamber is formed between the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1 and the inner cavity of the sealing cover 3, the process of the air supply device 9 supplying gas to the inner cavity of the sealing cover 3 is equivalent to inflating the battery pack 2. Based on the above arrangement, the explosion-proof valve tooling can not only open and close the valve cover 102, but also complete the inflation operation of the battery pack 2, thereby further improving the convenience and efficiency of the air tightness test.

[0118] The air supply device 9 may include an air source and an air pump assembly for generating positive pressure, and the air pump assembly may deliver the gas of the air source to the inner cavity of the sealing cover 3 along the inflation pipe 8. The inflation pipe 8 may be a channel opened on the sealing cover 3, or may be a pipe inserted in the sealing cover 3, as long as the inner cavity of the sealing cover 3 is connected to the outside, which is not limited here.

[0119] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a first guide rod 11, which is slidably arranged in the sealing cover 3 along a first direction, one end of the first guide rod 11 is connected to the adsorption member 4, and the other end of the first guide rod 11 is connected to the first driving member 5; the first driving member 5 is used to drive the first guide rod 11 to move along the first direction to drive the adsorption member 4 to move.

[0120] In this embodiment, the first direction (i.e. Figure 1 The X direction shown in the figure refers to the axial direction of the first guide rod 11; the first guide rod 11 is the first adapter mentioned above; the shape of the first guide rod 11 can be a cylinder or a cuboid, and the first guide rod 11 can also be spliced ​​by at least one section of a cylinder and at least one section of a cuboid.

[0121] The first driving member 5 can drive the adsorption member 4 to move via the first guide rod 11 , thus reducing the difficulty of the first driving member 5 driving the adsorption member 4 to move.

[0122] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a first elastic member 12 , which is sleeved on the first guide rod 11 , and the first elastic member 12 is elastically supported between the adsorption member 4 and the sealing cover 3 .

[0123] Specifically, the first elastic member 12 can be set as a spring or a spring sheet, etc. The contact end of the first elastic member 12 and the adsorption member 4 can be connected to the adsorption member 4, or the contact end of the first elastic member 12 and the adsorption member 4 can also be not connected to the adsorption member 4; the contact end of the first elastic member 12 and the sealing cover 3 can be connected to the sealing cover 3, or the contact end of the first elastic member 12 and the sealing cover 3 can also be not connected to the sealing cover 3. It should be noted that, in some embodiments, the first elastic member 12 is always in a compressed state to provide an elastic force.

[0124] The first elastic member 12 can provide an elastic force to the adsorption member 4 to ensure that the adsorption member 4 can be firmly abutted against the valve cover 102 .

[0125] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a second driving member 7 and a second guide rod 13, and the second driving member 7 is transmission-connected to the sealing cover 3; the second driving member 7 is used to drive the sealing cover 3 to move along the first direction, so that the sealing cover 3 covers or moves away from the end of the target explosion-proof valve 1 provided with a valve cover 102; The second guide rod 13 is along the first direction (i.e. Figure 1 The second guide rod 13 is slidably arranged in the fixing bracket 6 in the X direction as shown in the figure. One end of the second guide rod 13 is connected to the sealing cover 3, and the other end of the second guide rod 13 is connected to the second driving member 7. The second driving member 7 is used to drive the second guide rod 13 to move along the first direction to drive the sealing cover 3 to move.

[0126] Specifically, the second guide rod 13 is the second adapter mentioned above. The second guide rod 13 can be in the shape of a cylinder or a cuboid, and can also be formed by splicing at least one section of a cylinder and at least one section of a cuboid.

[0127] The second guide rod 13 can be a solid guide rod, or a through hole can be machined along its axis. For example, if a through hole is machined along its axis on the second guide rod 13, the first guide rod 11 can be inserted into the second guide rod 13 through the through hole.

[0128] For example, refer to Figures 2 to 4 A third through hole (not shown in the figure) can be processed on the fixed bracket 6, and the second guide rod 13 is penetrated through the third through hole and slidably connected to the third through hole.

[0129] The second driving member 7 can drive the sealing cover 3 to move via the second guide rod 13 , thereby reducing the difficulty of achieving the second driving member 7 driving the sealing cover 3 to move.

[0130] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a second elastic member 14 , which is sleeved on the second guide rod 13 , and the second elastic member 14 is elastically supported between the sealing cover 3 and the fixing bracket 6 .

[0131] Specifically, the second elastic member 14 can be set as a spring or a spring sheet, etc. The contact end of the second elastic member 14 and the sealing cover 3 can be connected to the sealing cover 3, or the contact end of the second elastic member 14 and the sealing cover 3 can also be not connected to the sealing cover 3; the contact end of the second elastic member 14 and the fixing bracket 6 can be connected to the fixing bracket 6, or the contact end of the second elastic member 14 and the fixing bracket 6 can also be not connected to the fixing bracket 6. It should be noted that, in some embodiments, the second elastic member 14 is always in a compressed state to provide an elastic force.

[0132] The second elastic member 14 can provide an elastic force to the sealing cover 3 so that the sealing cover 3 can be firmly attached to one end of the fixing bracket 6 .

[0133] In some embodiments, reference Figures 1 to 4 The second driving member 7 includes a second cam portion 701 and a second grip portion 702. The second cam portion 701 rotates around a second axis (i.e. Figure 1 The axis b) shown is rotatably connected to the second guide rod 13 , the second cam portion 701 abuts against the fixed bracket 6 , and the second axis is perpendicular to the first direction; the second gripping portion 702 is connected to the second cam portion 701 .

[0134] The second cam portion 701 can be configured as one plate or two plates. Exemplarily, when the second cam portion 701 is configured as two plates, the two plates are symmetrically arranged relative to the central axis of the second guide rod 13 .

[0135] The second gripping portion 702 may be integrally formed with the second cam portion 701 , and the second gripping portion 702 may also be connected to the second cam portion 701 via a fastener or by welding.

[0136] Reference Figures 1 to 4 The second cam portion 701 is provided with a first limiting surface (not shown in the figure) in the circumferential direction. When the second driving member 7 is in the initial position, the first limiting surface abuts against the fixed bracket 6. When the second cam portion 701 is in the initial position, the first limiting surface abuts against the fixed bracket 6 and limits the position, the bottom surface of the sealing cover 3 abuts against the fixed bracket 6, and the explosion-proof valve cannot be assembled with the fixed bracket 6. The second cam portion 701 drives the sealing cover 3 relative to the fixed bracket 6 along the first direction (i.e. Figure 1 The sealing cover 3 moves in the X direction as shown, and an assembly space for the explosion-proof valve to enter the fixed bracket 6 is formed between the bottom of the sealing cover 3 and the fixed bracket 6; at this time, the tester can install the explosion-proof valve into the fixed bracket 6, and then control the second cam portion 701 to return to the initial position; after the second cam portion 701 is reset, the sealing cover 3 will form a closed chamber with the valve body 101.

[0137] In this embodiment, the tester can drive the sealing cover 3 to move by manually rotating the second cam portion 701, which can reduce the operating difficulty of the tester.

[0138] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a first guide rod 11, which is slidably arranged in the sealing cover 3 along a first direction, one end of the first guide rod 11 is connected to the adsorption member 4, and the other end of the first guide rod 11 is connected to the first driving member 5; the first driving member 5 is used to drive the first guide rod 11 to move along the first direction to drive the adsorption member 4 to move; the second guide rod 13 is a hollow structure, and the first guide rod 11 is slidably connected to the inner cavity of the second guide rod 13 along the first direction.

[0139] Specifically, the hollow structure means that the second guide rod 13 has a through hole along its axis, and the first guide rod 11 can slide in the through hole. For example, the through hole is a square hole, and the shape of the first guide rod 11 is a rectangular parallelepiped that matches the square hole. The first guide rod 11 can only move in the first direction (i.e. Figure 1 The machine can slide in the X direction (as shown) but cannot rotate in the circumferential direction.

[0140] The second guide rod 13 can be used as an assembly base for the first guide rod 11, so that the overall structure of the explosion-proof valve tooling is more compact and occupies less space.

[0141] In some embodiments, reference Figures 1 to 4 The first driving member 5 includes a first cam portion 501 and a first gripping portion 502. The first cam portion 501 rotates around a first axis (i.e. Figure 1 The axis a) shown is rotatably connected to the end of the first guide rod 11 away from the adsorption member 4 , the first cam portion 501 abuts against the second guide rod 13 , and the first axis is perpendicular to the first direction; the first gripping portion 502 is connected to the first cam portion 501 .

[0142] Reference Figure 2 , when the first cam portion 501 is located at the initial position, the second limiting surface 5011 abuts against and limits the second guide rod 13, and there is a first distance between the adsorption member 4 and the valve cover 102; Figure 3 , when the first cam portion 501 is located at the middle position, the third limiting surface 5012 abuts against and limits the second guide rod 13, and the adsorption member 4 contacts the valve cover 102; refer to Figure 4 When the first cam portion 501 is in the working position, the fourth limiting surface 5013 abuts against and limits the second guide rod 13, and the adsorption component 4 pulls the valve cover 102 to the designed height, and the valve cover 102 and the valve body 101 are separated to form an inflation opening. At this time, the distance between the adsorption component 4 and the valve body 101 is the second distance; it should be noted that the first distance needs to be greater than the second distance.

[0143] The first cam portion 501 may be configured as one plate or two plates. Exemplarily, when the first cam portion 501 is configured as two plates, the two plates are symmetrically arranged relative to the central axis of the first guide rod 11 .

[0144] The first gripping portion 502 may be integrally formed with the first cam portion 501 , and the first gripping portion 502 may also be connected to the first cam portion 501 via a fastener or by welding.

[0145] In this embodiment, the tester can drive the adsorption component 4 to move by manually rotating the first cam portion 501 , thereby reducing the operating difficulty of the tester.

[0146] In some embodiments, reference Figures 1 to 4 The adsorption member 4 is provided with an adsorption cavity 401, the first guide rod 11 is provided with an adsorption channel 1101, and the second guide rod 13 is provided with a connecting channel 1301; the adsorption cavity 401 is used to be set toward the valve cover 102, one end of the adsorption channel 1101 is connected with the adsorption cavity 401, and the other end of the adsorption channel 1101 is connected with one end of the connecting channel 1301, and the other end of the connecting channel 1301 is used to connect the negative pressure device 10.

[0147] The adsorption channel 1101 may include a first channel section and a second channel section. The first channel section may extend along the axial direction of the first guide rod 11 so that the first guide rod 11 forms a hollow structure. The lower end of the first channel section is connected to the adsorption cavity 401. The second channel section is opened on the cylindrical surface of the first guide rod 11 and is connected to the upper end of the first channel section. The second channel section can be set to multiple and arranged in a circumferential array along the first guide rod 11; the connecting channel 1301 can be opened on the cylindrical surface of the second guide rod 13 and is connected to the inner cavity of the hollow second guide rod 13, and the height position of the connecting channel 1301 is opposite to the second channel section, so that the connection between the connecting channel 1301 and the adsorption channel 1101 can be achieved. Based on the above configuration, the negative pressure device 10 can be connected to the adsorption cavity 401 through the connecting channel 1301 and the adsorption channel 1101; when the surface of the adsorption cavity 401 is in contact with the valve cover 102, the negative pressure device 10 draws the gas in the adsorption cavity 401 to the outside through the adsorption channel 1101 and the connecting channel 1301, so that a negative pressure environment is formed in the adsorption cavity 401, so that the adsorption member 4 can be attracted to the valve cover 102 and pull the valve cover 102 to open. Among them, the negative pressure device 10 may include an air pump component with a suction function, etc.

[0148] By setting up the auxiliary channel and the connecting channel 1301, the connection between the external negative pressure device 10 and the internal adsorption component 4 can be achieved without affecting the basic structure and connection relationship of the first guide rod 11 and the second guide rod 13, so that the negative pressure suction action of the adsorption component 4 can be carried out normally.

[0149] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes a fixed bracket 6, which is used to be fixedly connected to the valve body 101 of the target explosion-proof valve 1, and the sealing cover 3 can be movably connected to the fixed bracket 6; the first driving member 5 and the second driving member 7 are both arranged outside the fixed bracket 6.

[0150] Based on the above design, the assembly of the first driving member 5 and the second driving member 7 can be made more convenient.

[0151] In some embodiments, reference Figures 1 to 4 The fixing bracket 6 includes a top wall 601 and a side wall 602 . The side wall 602 is arranged around the periphery of the top wall 601 to form a receiving cavity 603 . The sealing cover 3 is arranged in the receiving cavity 603 . The receiving cavity 603 is used to receive at least a part of the target explosion-proof valve 1 .

[0152] For example, the valve body 101 of the target explosion-proof valve 1 can enter the accommodating cavity 603 through the bottom of the side wall 602, the side wall 602 can be set as an annular structure, and the valve cover 102 can be connected with the fixing bracket 6 through an elastic buckle structure set on the inner side of the side wall 602; Figure 1 As shown, an avoidance opening 6021 is provided on the side of the side wall 602 , so that the valve body 101 of the target explosion-proof valve 1 can enter the accommodating cavity 603 from the side of the side wall 602 through the avoidance opening 6021 .

[0153] In some embodiments, reference Figures 1 to 4 A limiting flange 6022 is protruded from the opening of one end of the side wall 602 away from the top wall 601 , and the limiting flange 6022 is used to snap-fit ​​into the limiting groove 1011 of the target explosion-proof valve 1 .

[0154] Through the cooperation between the limiting flange 6022 and the limiting groove 1011, the explosion-proof valve can be stably snap-fitted and assembled into the fixing bracket 6, thereby improving the tightness of the connection between the explosion-proof valve and the fixing bracket 6.

[0155] In some embodiments, reference Figures 1 to 4 The explosion-proof valve tooling also includes an inflation pipe 8, which is slidably arranged in the top wall 601 along a first direction, one end of the inflation pipe 8 is connected to the inner cavity of the sealing cover 3, and the other end of the inflation pipe 8 is used to connect to the air supply device 9.

[0156] Specifically, since the sealing cover 3 is moved along the first direction (i.e. Figure 1 The air supply device 9 can transport external gas to the inner cavity of the sealing cover 3 through the air supply pipe 8 while avoiding the air supply pipe 8 from hindering the relative movement between the sealing cover 3 and the fixed support 6.

[0157] The present application also provides an explosion-proof valve detection system. Figures 5 to 7 , the explosion-proof valve detection system comprises a target explosion-proof valve 1, a negative pressure device 10 and an explosion-proof valve tooling in any of the above embodiments; The sealing cover 3 is arranged on one end of the target explosion-proof valve 1 provided with a valve cover 102, and the negative pressure device 10 is connected to the adsorbent 4; the negative pressure device 10 is used to perform a suction operation on the adsorbent 4 so that the adsorbent 4 adsorbs the valve cover 102 under the action of negative pressure.

[0158] In this embodiment, the target explosion-proof valve 1 is arranged on the battery pack 2 to be tested, and the inner cavity of the valve body 101 of the target explosion-proof valve 1 is connected with the interior of the battery pack 2; when the valve cover 102 of the target explosion-proof valve 1 is not opened, the inner cavity of the valve body 101 and the interior of the battery pack 2 form a closed chamber; when the valve cover 102 is opened, the interior of the battery pack 2 can be connected with the outside through the valve body 101.

[0159] The negative pressure device 10 may include an air pump assembly with a suction function, etc.

[0160] During the air tightness test of the battery pack 2, after the sealing cover 3 is placed on the end of the target explosion-proof valve 1 provided with the valve cover 102, the adsorbent 4 can be driven to contact the valve cover 102 by the first driving member 5, and then the adsorbent 4 can be sucked by the negative pressure device 10, so that the adsorbent 4 is attracted to the valve cover 102 under the action of negative pressure, and the first driving member 5 then drives the adsorbent 4 to move away from the target explosion-proof valve 1 to drive the valve cover 102 attracted to the adsorbent 4 to open, and then the valve body 101 of the target explosion-proof valve 1 can be inflated to perform subsequent air tightness tests; and if the valve cover 102 needs to be closed, it is only necessary to stop the negative pressure suction operation on the adsorbent 4, separate the valve cover 102 from the adsorbent 4 and re-cover it on the valve body 101 under the action of the spring.

[0161] It should be noted that the sealing cover 3 and the target explosion-proof valve 1 are sealed and connected. Therefore, when the valve cover 102 is opened, a closed chamber can be formed between the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1 and the inner cavity of the sealing cover 3. The airtightness test can be carried out after the inflation is completed and the valve cover 102 is opened. At this time, the sealing performance of the battery pack 2 is tested; or after the inflation is completed, the negative pressure suction operation on the adsorption component 4 is stopped, the valve cover 102 is separated from the adsorption component 4 and re-covered on the valve body 101, so that the interior of the battery pack 2 and the interior of the valve body 101 of the target explosion-proof valve 1 form a closed chamber, and the inner cavity of the sealing cover 3 also forms a closed chamber, and then the airtightness test is carried out. At this time, the sealing performance of the target explosion-proof valve 1 itself is tested; of course, in actual applications, the above two methods can also be used simultaneously for airtightness testing to obtain more comprehensive test results, which is not limited here.

[0162] Based on the above arrangement, when no iron sheet is provided inside the valve cover 102 and the valve cover 102 is made of non-metallic material, the valve cover 102 can be conveniently opened and closed by negative pressure adsorption, so that the air tightness test can be carried out smoothly and efficiently.

[0163] Since the explosion-proof valve detection system in this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0164] In some embodiments, reference Figures 5 to 7 The explosion-proof valve detection system also includes an air supply device 9, which is connected to the sealing cover 3 and is used to inflate the inner cavity of the sealing cover 3.

[0165] Specifically, the air supply device 9 can be connected to the inner cavity of the sealing cover 3 through the inflation pipe 8. During the air tightness test, after the adsorbent 4 drives the valve cover 102 to open, the air supply device 9 can supply gas to the inner cavity of the sealing cover 3 through the inflation pipe 8. Since a closed chamber is formed between the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1 and the inner cavity of the sealing cover 3, the process of the air supply device 9 supplying gas to the inner cavity of the sealing cover 3 is equivalent to inflating the battery pack 2. Based on the above arrangement, the explosion-proof valve tooling can not only realize the opening and closing of the valve cover 102, but also complete the inflation operation of the battery pack 2, thereby further improving the convenience and efficiency of the air tightness test.

[0166] The air supply device 9 may include an air source and an air pump assembly for generating positive pressure, and the air pump assembly may deliver the gas of the air source to the inner cavity of the sealing cover 3 along the inflation pipe 8. The inflation pipe 8 may be a channel opened on the sealing cover 3, or may be a pipe inserted in the sealing cover 3, as long as the inner cavity of the sealing cover 3 is connected to the outside, which is not limited here.

[0167] In some embodiments, reference Figures 5 to 7 The negative pressure device 10 is connected to the sealing cover 3, and the negative pressure device 10 is used to extract the gas in the inner cavity of the sealing cover 3 outward.

[0168] Specifically, the negative pressure device 10 can be connected to the inner cavity of the sealing cover 3 through the negative pressure pipeline. When the pressure in the inner cavity of the sealing cover 3 is too high, a part of the gas in the inner cavity of the sealing cover 3 can be pumped out through the negative pressure device 10; and when the gas in the inner cavity of the sealing cover 3 needs to be emptied due to the requirements of the airtightness test, all the gas in the inner cavity of the sealing cover 3 can be pumped out through the negative pressure device 10 to form a vacuum environment in the sealing cover 3. Exemplarily, based on the air tightness test process in the above embodiment, after the air supply device 9 has completed inflating the battery pack 2 and completed the inspection of the sealing performance of the battery pack 2, the valve cover 102 is re-covered on the valve body 101, so that the interior of the battery pack 2 and the interior of the valve body 101 of the target explosion-proof valve 1 form a first closed chamber, and the inner cavity of the sealing cover 3 forms a second closed chamber, and the first closed chamber and the second closed chamber are not connected to each other; at this time, the negative pressure device 10 can extract all the gas in the second closed chamber to form a vacuum environment. If it is detected that the air pressure in the second closed chamber increases subsequently, it may be that the gas in the first closed chamber leaks into the second closed chamber through the abnormal sealing position of the valve cover 102, so that the air tightness inspection of the target explosion-proof valve 1 itself can be achieved.

[0169] Through the cooperation between the negative pressure device 10 and the air supply device 9, the air supply operation and the air exhaust operation of the sealing cover 3 can be realized, so that the air pressure condition of the inner cavity of the sealing cover 3 can better meet the actual test requirements.

[0170] It should be noted that the negative pressure device 10 and the air supply device 9 can be connected to the inner cavity of the sealing cover 3 through the same ventilation pipe. For example, they can be connected to the inner cavity of the sealing cover 3 through the inflation pipe 8 in the above embodiment, and ensure that the negative pressure device 10 and the air supply device 9 do not work at the same time. In this way, the structure of the explosion-proof valve detection system can be avoided from being too complicated.

[0171] In some embodiments, reference Figures 5 to 7 , the air supply device 9 is connected to the adsorption member 4; the air supply device 9 is used to inflate the adsorption member 4 so that the adsorption member 4 is separated from the valve cover 102 under the action of positive pressure.

[0172] Based on the air tightness test process in the above embodiment, when the air supply device 9 has completed inflating the battery pack 2 and completed the inspection of the sealing performance of the battery pack 2, the negative pressure device 10 stops the negative pressure suction operation on the adsorption component 4. At this time, the adsorption component 4 can be inflated again through the air supply device 9 to ensure that the valve cover 102 can be smoothly separated from the adsorption component 4 through the positive pressure effect, and push the valve cover 102 to cover the valve body 101 again.

[0173] It should be noted that the air supply device 9 and the negative pressure device 10 can be connected to the adsorption component 4 through the same ventilation pipeline. For example, they can be connected to the adsorption cavity 401 of the adsorption component 4 through the connecting channel 1301 of the second guide rod 13 and the adsorption channel 1101 of the first guide rod 11 in the above embodiment, and ensure that the air supply device 9 and the negative pressure device 10 do not work at the same time. In this way, the structure of the explosion-proof valve detection system can be avoided from being too complicated.

[0174] In some embodiments, reference Figures 5 to 7 The explosion-proof valve detection system also includes a second pressure sensor 16, which is used to obtain a third pressure value in the connection path between the negative pressure device 10 and the adsorption member 4.

[0175] By setting up a second pressure sensor 16 to obtain a third pressure value in the connection path between the negative pressure device 10 and the adsorbent 4, it is possible to judge whether the adsorbent 4 is firmly attached to the valve cover 102 and whether the adsorbent 4 successfully drives the valve cover 102 to open, etc., based on the size and change of the third pressure value during the negative pressure suction operation performed on the adsorbent 4 by the negative pressure device 10.

[0176] In addition, when the valve cover 102 is separated from the adsorption component 4 and re-covered on the valve body 101, the adsorption end of the adsorption component 4 (specifically, the adsorption cavity 401) is connected to the inner cavity of the sealing cover 3. At this time, the adsorption component 4 can be subjected to negative pressure suction operation by the negative pressure device 10 to exhaust the gas in the inner cavity of the sealing cover 3; and in this process, it can be judged whether there is a gas leakage according to the size and change of the third pressure value, so as to stop the negative pressure suction operation after ensuring that the gas in the sealing cover 3 has been completely emptied.

[0177] Based on the above settings, it can help testers to control the corresponding test links more intuitively and accurately, and can intervene in time when the third pressure value does not match the preset situation, so as to eliminate abnormalities and faults in a timely and accurate manner to avoid affecting subsequent test processes.

[0178] In some embodiments, reference Figures 5 to 7 The explosion-proof valve detection system also includes a first pressure sensor 15, which is used to obtain a first pressure value in the connection passage between the air supply device 9 and the sealing cover 3.

[0179] By setting the first pressure sensor 15 to obtain the first pressure value in the connection passage between the air supply device 9 and the sealing cover 3, it is possible to judge whether there is any leakage in the sealing cover 3, the target explosion-proof valve 1, and the battery pack 2 according to the size and change of the first pressure value during the inflation operation of the inner cavity of the sealing cover 3 through the air supply device 9, and stop the inflation operation after ensuring that the gas volume in the corresponding chamber reaches the preset value, thereby helping the test personnel to control the corresponding test links more intuitively and accurately and improve the accuracy of the test results.

[0180] In some embodiments, reference Figures 5 to 7 The explosion-proof valve detection system also includes a first pressure sensor 15, which is used to obtain a second pressure value in the connection passage between the negative pressure device 10 and the sealing cover 3.

[0181] By setting the first pressure sensor 15 to obtain the second pressure value in the connection passage between the negative pressure device 10 and the sealing cover 3, it is possible to judge whether a gas leakage occurs based on the size and change of the second pressure value during the process of performing a negative pressure suction operation on the inner cavity of the sealing cover 3 through the negative pressure device 10 to empty the gas in the sealing cover 3, so as to stop the negative pressure suction operation after ensuring that the gas in the sealing cover 3 has been completely emptied. This can help the tester to control the corresponding test links more intuitively and accurately, thereby improving the accuracy of the test results.

[0182] In some embodiments, reference Figures 5 to 7 The explosion-proof valve detection system further includes a second pressure sensor 16 , which is used to obtain a fourth pressure value in the connection passage between the air supply device 9 and the adsorption member 4 .

[0183] By setting a second pressure sensor 16 to obtain a fourth pressure value in the connection passage between the air supply device 9 and the adsorbent 4, it is possible to judge whether the valve cover 102 has been successfully separated from the adsorbent 4 based on the size and change of the fourth pressure value during the inflation operation of the adsorbent 4 through the air supply device 9 to ensure that the valve cover 102 is separated from the adsorbent 4. This can help testers to control the corresponding test links more intuitively and accurately and ensure the normal progress of the test process.

[0184] In some embodiments, reference Figures 5 to 7 The explosion-proof valve detection system also includes a pressure tester 17, which is used to obtain the pressure change of the inner cavity of the sealing cover 3 within a preset time.

[0185] Based on the air tightness test process in the above embodiment, when the air supply device 9 completes the inflation of the battery pack 2, since the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1, and the inner cavity of the sealing cover 3 together constitute a closed chamber, under normal sealing conditions, the air pressure in the closed chamber should not change significantly within a certain period of time; based on this consideration, after the battery pack 2 is completely inflated, the pressure change in the inner cavity of the sealing cover 3 within a certain period of time detected by the pressure tester 17 (that is, the pressure change in the above-mentioned closed chamber) can be used to determine whether leakage and sealing abnormality occur, thereby realizing the sealing performance detection of the battery pack 2.

[0186] Similarly, when the valve cover 102 is re-covered on the valve body 101 and the negative pressure device 10 completely empties the gas in the inner cavity of the sealing cover 3, since the interior of the battery pack 2 and the interior of the valve body 101 of the target explosion-proof valve 1 form a first closed chamber, the inner cavity of the sealing cover 3 forms a second closed chamber, and the first closed chamber and the second closed chamber are not connected to each other, so when the seal is normal (that is, the seal between the valve cover 102 and the valve body 101 is normal), the air pressure in the second closed chamber should not change significantly within a certain period of time; based on this consideration, after the gas in the inner cavity of the sealing cover 3 is emptied, the pressure change in the inner cavity of the sealing cover 3 within a certain period of time detected by the pressure tester 17 (that is, the pressure change in the above-mentioned second closed chamber) can be used to judge whether the seal between the first closed chamber and the second closed chamber is normal, whether the gas in the first closed chamber leaks into the second closed chamber, etc., thereby realizing the sealing performance detection of the target explosion-proof valve 1 itself.

[0187] The present application also provides an operation method of the explosion-proof valve detection process, see Figure 5 and Figure 6 The operation method of the explosion-proof valve detection process includes the following steps: The adsorbent 4 is driven to fit with the valve cover 102 of the target explosion-proof valve 1, so that a first cavity is formed between at least a portion of the adsorbent 4 and the valve cover 102; performing a suction operation on the first cavity; The adsorbing member 4 is driven to move, so as to drive the valve cover 102 to open, thereby exposing the vent covered by the valve cover 102 .

[0188] Specifically, when the adsorption end of the adsorption component 4 is in close contact with the valve cover 102, a closed first cavity will be formed between the adsorption end and the valve cover 102, and the suction operation of the negative pressure device 10 can exhaust the gas in the first cavity within a certain period of time, so that the air pressure in the first cavity is reduced to zero or close to zero; then the adsorption component 4 can be driven to drive the valve cover 102 to open, so that the vent on the target explosion-proof valve 1 is exposed, so that the valve body 101 of the target explosion-proof valve 1 can be inflated through the vent to perform air tightness detection.

[0189] Based on the above arrangement, when no iron sheet is provided inside the valve cover 102 and the valve cover is made of non-metallic material, the valve cover 102 can be opened conveniently by negative pressure adsorption through the adsorption member 4, which provides convenience for subsequent inflation operation and air tightness detection process.

[0190] It should be noted that a third valve 20 may be provided on the connection passage between the negative pressure device 10 and the adsorbent 4 , and by opening the third valve 20 , the negative pressure device 10 may start to perform a suction operation on the adsorbent 4 .

[0191] In some embodiments, reference Figure 5 and Figure 6 After the step of performing the suction operation on the first cavity, the operation method of the explosion-proof valve detection process further includes the following steps: After completing the suction operation for a preset time, obtaining a third pressure value in the first cavity; The step of driving the adsorption member 4 to move comprises: When the third pressure value is not greater than the first pressure threshold, driving the adsorption member 4 to move; When the third pressure value is greater than the first pressure threshold, a first abnormal prompt message is output.

[0192] When the adsorption end of the adsorption component 4 does not fit normally with the valve cover 102 due to assembly abnormalities or other reasons, the suction operation of the negative pressure device 10 may not be able to completely exhaust the gas in the first cavity within the preset time, resulting in a higher gas pressure in the first cavity. Based on the above considerations, after completing the suction operation for a preset time, it is determined whether the third pressure value is greater than the first pressure threshold to determine whether an abnormal condition occurs. If there is no abnormal condition, it is determined that the adsorption component 4 has been tightly attracted to the valve cover 102. At this time, the adsorption component 4 can be driven to open the valve cover 102 and perform subsequent test procedures; if an abnormal condition occurs, the first abnormal prompt information can be output to remind the tester to check and adjust the assembly in time.

[0193] In some embodiments, reference Figure 5 and Figure 6 After the step of driving the adsorption member 4 to move so as to drive the valve cover 102 to open and expose the vent covered by the valve cover 102, the operation method of the explosion-proof valve detection process further includes the following steps: When the third pressure value increases to the second pressure threshold, a second abnormal prompt information is output; the second pressure threshold is greater than the first pressure threshold.

[0194] Specifically, in the process of the adsorption member 4 driving the valve cover 102 to open, if the adsorption end of the adsorption member 4 and the valve cover 102 remain in close contact, the air pressure in the first cavity should not change significantly, and the air pressure should be maintained at zero or close to zero. Based on the above considerations, in the process of driving the adsorption member 4 to move, it can be determined whether the valve cover 102 remains in contact with the adsorption member 4 by determining whether the third pressure value increases to the second pressure threshold, thereby determining whether the adsorption member 4 successfully drives the valve cover 102 to open; in the case where the adsorption member 4 does not drive the valve cover 102 to open normally, the second abnormal prompt information is output to remind the test personnel to intervene in time so as not to affect the subsequent test process.

[0195] In some embodiments, reference Figure 5 and Figure 6 After the step of driving the adsorption member 4 to move so as to drive the valve cover 102 to open and expose the vent covered by the valve cover 102, the operation method of the explosion-proof valve detection process further includes the following steps: The interior of the target explosion-proof valve 1 is inflated with air through the vent port.

[0196] In practical applications, the target explosion-proof valve 1 may be inflated by directly supplying air to the vent, or by supplying air to other cavities connected to the vent, which is not limited here.

[0197] Inflating the interior of the target explosion-proof valve 1 through the vent can provide a basis for the subsequent air tightness detection process.

[0198] In some embodiments, reference Figure 5 and Figure 6 Before the step of driving the adsorption member 4 to fit the valve cover 102 of the target explosion-proof valve 1, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve 1 with a valve cover 102 with a sealing cover 3; the adsorbent 4 is disposed in the second cavity; The step of inflating the interior of the target explosion-proof valve 1 through the vent includes: The second cavity is inflated so that the inflated gas enters the interior of the target explosion-proof valve 1 through the vent.

[0199] In this embodiment, when the adsorbent 4 drives the valve cover 102 to open, a closed second cavity is formed between the interior of the battery pack 2, the interior of the target explosion-proof valve 1 and the inner cavity of the sealing cover 3. Therefore, the process of supplying gas into the second cavity is equivalent to inflating the interior of the battery pack 2; and after the inflation is completed, the subsequent air tightness test process can be carried out. Based on the above configuration, the air supply device 9 can be integrated into the sealing cover 3, and there is no need to connect the air supply device 9 at the vent after the valve cover 102 is opened, thereby further improving the convenience and efficiency of the air tightness test.

[0200] It should be noted that a first valve 18 may be provided on the connection passage between the air supply device 9 and the sealing cover 3 , and by opening the first valve 18 , the air supply device 9 may start to inflate the second cavity.

[0201] In some embodiments, reference Figure 5 and Figure 6 The step of inflating the second cavity so that the inflated gas enters the interior of the target explosion-proof valve 1 through the vent includes: Acquire a first pressure value of the second cavity; When the first pressure value reaches the third pressure threshold, the inflation into the second cavity is stopped.

[0202] During the inflation process of the above embodiment, as the gas is continuously filled in, the air pressure in the second cavity will continue to increase; by judging whether the first pressure value of the second cavity reaches the third pressure threshold, it can be accurately determined whether the inflation operation is completed; when it is confirmed that the inflation volume has reached the preset level, the inflation operation is stopped.

[0203] It should be noted that a first valve 18 may be provided on the connection passage between the air supply device 9 and the sealing cover 3. By closing the first valve 18, the air supply device 9 may stop inflating the inner cavity of the sealing cover 3 (ie, stop inflating the second cavity).

[0204] In some embodiments, reference Figure 5 and Figure 6 After the step of inflating the second cavity so that the inflated gas enters the interior of the target explosion-proof valve 1 through the vent, the operation method of the explosion-proof valve detection process further includes the following steps: Obtaining a first pressure change of the second cavity within a preset time; When the first pressure change reaches the first change threshold, third abnormality prompt information is output.

[0205] After the inflation is completed, under the condition of normal sealing, the air pressure of the closed second cavity formed by the interior of the battery pack 2, the interior of the target explosion-proof valve 1, and the inner cavity of the sealing cover 3 should not change significantly within a certain period of time. Based on this consideration, this embodiment detects the first pressure change in the second cavity within a preset time and makes a judgment. If the first pressure change reaches the first change threshold, it means that the air pressure of the second cavity has changed significantly, thereby judging that the battery pack 2 may have an abnormal sealing condition and cause gas leakage, so that the test personnel can be promptly reminded to intervene by outputting the third abnormal prompt information.

[0206] The pressure change amount of the inner cavity of the sealing cover 3 within a preset time can be detected by the pressure tester 17 to realize the detection of the first pressure change amount of the second cavity within the preset time.

[0207] Based on the above arrangement, accurate detection of the sealing performance of the battery pack 2 can be achieved.

[0208] In some embodiments, reference Figure 5 and Figure 6 Before the step of obtaining the first pressure change of the second cavity within the preset time, the operation method of the explosion-proof valve detection process further includes the following steps: The target explosion-proof valve 1 is left to stand for a preset time.

[0209] Since the gas is fluid, the airflow in the second cavity is still in an unstable state for a period of time after the inflation is completed. At this time, there may be deviations in the air pressure detection, which may lead to misjudgment. Based on this situation, in this embodiment, the target explosion-proof valve 1 is left to stand for a preset time after the inflation is completed, so that the airflow in the second cavity tends to be stable and the air pressure tends to be balanced, and then the first pressure change is obtained, which can further improve the accuracy of the final air tightness detection result.

[0210] In some embodiments, reference Figure 7 After the step of inflating the interior of the target explosion-proof valve 1 through the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The suction operation on the adsorbent 4 is stopped, so that the valve cover 102 is separated from the adsorbent 4 and is re-sealed on the vent.

[0211] After the above-mentioned inflation operation and air tightness detection operation are completed, the valve cover 102 needs to be closed; at this time, stopping the suction operation on the adsorption component 4 can make the valve cover 102 lose the negative pressure effect, so that the valve cover 102 can be re-closed on the target explosion-proof valve 1 under the action of gravity or the force of other connecting devices (such as the elastic force of the spring), thereby realizing the automatic closing of the valve cover 102.

[0212] It can be understood that the closing operation of the valve cover 102 in the present embodiment can be performed after the air tightness detection operation of the battery pack 2 in the above embodiment is completed; it can also be performed directly after the battery pack 2 is inflated, and the air tightness detection operation of the battery pack 2 can be arranged in a subsequent step; it can be flexibly adjusted according to actual conditions during the test process, and is not limited here.

[0213] In some embodiments, reference Figure 7 The step of stopping the suction operation on the adsorbent 4, separating the valve cover 102 from the adsorbent 4 and resealing the vent includes: The adsorbent 4 is inflated, so that the valve cover 102 is separated from the adsorbent 4 under the action of positive pressure and is re-sealed on the vent; The inflation operation of the adsorption member 4 is stopped.

[0214] While stopping the negative pressure suction operation on the adsorbent 4, the adsorbent 4 is inflated, so that the valve cover 102 can be smoothly separated from the adsorbent 4 through the positive pressure, and the valve cover 102 can be re-covered on the target explosion-proof valve 1 under the positive pressure.

[0215] Specifically, the negative pressure device 10 can be used to perform negative pressure suction on the adsorbent 4. During the closing process of the valve cover 102, the third pressure value in the connection passage between the negative pressure device 10 and the adsorbent 4 obtained by the second pressure sensor 16 can be used to determine whether the valve cover 102 is normally separated from the adsorbent 4, and the inflation operation on the adsorbent 4 is stopped after it is determined that the valve cover 102 is separated from the adsorbent 4.

[0216] Specifically, the adsorbent 4 can be inflated by the air supply device 9, and a fourth valve 21 can be provided on the connection passage between the air supply device 9 and the adsorbent 4. By closing the fourth valve 21, the air supply device 9 can stop inflating the adsorbent 4.

[0217] In some embodiments, reference Figures 5 to 7 Before the step of driving the adsorption member 4 to fit the valve cover 102 of the target explosion-proof valve 1, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve 1 with a valve cover 102 with a sealing cover 3; the adsorbent 4 is disposed in the second cavity; After the step of stopping the suction operation on the adsorbent 4, separating the valve cover 102 from the adsorbent 4 and resealing the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The gas in the second cavity is discharged outward.

[0218] In the present embodiment, after the valve cover 102 is closed again, the interior of the battery pack 2 and the interior of the target explosion-proof valve 1 form a first closed chamber, and the inner cavity of the sealing cover 3 forms a second cavity. When the sealing is normal (specifically, when the sealing between the valve cover 102 and the valve body 101 is normal), the first closed chamber and the second cavity are not connected to each other; at this time, the gas in the inner cavity of the sealing cover 3 can be emptied (that is, the gas in the second cavity is discharged to the outside), so that an air pressure difference can be formed between the first closed chamber and the second cavity. Subsequently, by obtaining the air pressure changes of the first closed chamber and / or the second cavity, it can be determined whether there is gas exchange between the first closed chamber and the second cavity, thereby providing a basis for ultimately determining the sealing performance of the target explosion-proof valve 1.

[0219] The operation of discharging the gas in the second cavity to the outside can be achieved by setting a pressure relief valve on the sealing cover 3, or by performing a negative pressure suction operation on the inner cavity of the sealing cover 3 through the negative pressure device 10; wherein, a second valve 19 can be set on the connecting passage between the negative pressure device 10 and the inner cavity of the sealing cover 3, and by opening the second valve 19, the negative pressure device 10 can start to perform a negative pressure suction operation on the inner cavity of the sealing cover 3.

[0220] In some embodiments, reference Figure 7 , the step of discharging the gas in the second cavity to the outside comprises: Obtaining a second pressure value of the second cavity; When the second pressure value reaches a fourth pressure threshold, the gas in the second cavity is stopped from being discharged to the outside.

[0221] In the process of evacuating the gas in the second cavity, the gas pressure in the second cavity will gradually decrease; by obtaining the second pressure value of the second cavity and comparing it with the preset fourth pressure threshold, the exhaust operation can be stopped after ensuring that the gas in the second cavity has been evacuated to the preset level (that is, when the second pressure value reaches the fourth pressure threshold), thereby helping the tester to control the above exhaust process more accurately.

[0222] Specifically, when the negative pressure device 10 is used to perform negative pressure suction on the inner cavity of the sealing cover 3 to exhaust the gas in the second cavity, the above-mentioned second pressure value can be obtained by the first pressure sensor 15 arranged in the connecting passage between the negative pressure device 10 and the sealing cover 3, so as to intuitively judge whether there is leakage or the like during the negative pressure suction process, and the negative pressure suction operation can be stopped after ensuring that the gas in the sealing cover 3 has been emptied to a preset level (that is, when the second pressure value reaches the fourth pressure threshold), thereby helping the tester to control the above-mentioned negative pressure suction process more accurately.

[0223] It should be noted that a second valve 19 may be provided on the connection passage between the negative pressure device 10 and the inner cavity of the sealing cover 3 , and by closing the second valve 19 , the negative pressure device 10 may stop performing negative pressure suction operation on the inner cavity of the sealing cover 3 .

[0224] In some embodiments, reference Figures 5 to 7 Before the step of driving the adsorption member 4 to fit the valve cover 102 of the target explosion-proof valve 1, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve 1 with the valve cover 102 with a sealing cover 3; an adsorbent 4 is arranged in the second cavity, and an adsorption end of the adsorbent 4 is connected to the second cavity; After the step of stopping the suction operation on the adsorbent 4, separating the valve cover 102 from the adsorbent 4 and resealing the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The adsorbent 4 is subjected to a suction operation to discharge the gas in the second cavity to the outside.

[0225] This embodiment provides another way to perform negative pressure suction operation on the inner cavity of the sealing cover 3, which is parallel to the way of directly extracting the gas in the inner cavity of the sealing cover 3 to the outside through the negative pressure device 10 in the above embodiment, and one of the ways can be selected during the actual test process. Specifically, based on the method adopted in this embodiment, when the adsorption component 4 is separated from the valve cover 102, the adsorption end of the adsorption component 4 (specifically, it can be the adsorption cavity 401 of the adsorption component 4) is connected to the inner cavity of the sealing cover 3. At this time, the adsorption component 4 can be subjected to negative pressure suction operation through the negative pressure device 10, so as to extract the gas in the inner cavity of the sealing cover 3 to the outside through the adsorption component 4, so that the gas in the second cavity can also be emptied.

[0226] It should be noted that a third valve 20 may be provided on the connection passage between the negative pressure device 10 and the adsorbent 4 , and by opening the third valve 20 , the negative pressure device 10 may start to perform a negative pressure suction operation on the adsorbent 4 .

[0227] In some embodiments, reference Figure 7 The step of performing a suction operation on the adsorbent 4 to discharge the gas in the second cavity to the outside includes: Acquire a third pressure value of the suction channel of the adsorption component 4; When the third pressure value reaches the fourth pressure threshold, the suction operation on the adsorption member 4 is stopped.

[0228] During the process of performing negative pressure suction operation on the adsorption component 4 through the negative pressure device 10 to empty the gas in the inner cavity of the sealing cover 3, the air pressure in the inner cavity of the sealing cover 3 will gradually decrease. Since the adsorption end of the adsorption component 4 (specifically, it can be the adsorption cavity 401 of the adsorption component 4) is connected to the inner cavity of the sealing cover 3, the third pressure value in the connecting passage between the negative pressure device 10 and the adsorption component 4 (that is, the suction channel of the adsorption component 4 mentioned above) will also gradually decrease; at this time, the above-mentioned third pressure value is obtained through the second pressure sensor 16, and it can be intuitively judged whether there is leakage during the suction process, and the negative pressure suction operation can be stopped after ensuring that the gas in the sealing cover 3 has been emptied to a preset level (that is, when the third pressure value reaches the fourth pressure threshold), thereby helping the tester to more accurately control the above-mentioned negative pressure suction process.

[0229] It should be noted that a third valve 20 can be provided on the connection passage between the negative pressure device 10 and the adsorbent 4 (that is, the suction channel of the adsorbent 4 mentioned above). By closing the third valve 20, the negative pressure device 10 can stop performing negative pressure suction operation on the adsorbent 4.

[0230] In some embodiments, reference Figure 7 After the step of discharging the gas in the second cavity to the outside, the operation method of the explosion-proof valve detection process further includes the following steps: The target explosion-proof valve 1 is left to stand for a preset time.

[0231] Since the gas is fluid, the airflow in the second cavity is still in an unstable state for a period of time after the gas in the second cavity is discharged to the outside. At this time, there may be deviations in the air pressure detection, which may lead to misjudgment. Based on this situation, in this embodiment, the target explosion-proof valve 1 is left to stand for a preset time after the exhaust is completed, so that the airflow in the second cavity tends to be stable and the air pressure tends to be balanced, and then the pressure change of the second cavity can be detected by the pressure tester 17, which can further improve the accuracy of the final air tightness test result.

[0232] In some embodiments, reference Figure 7 After the step of discharging the gas in the second cavity to the outside, the operation method of the explosion-proof valve detection process further includes the following steps: Obtaining a second pressure change in the second cavity within a preset time; When the second pressure change reaches the second change threshold, fourth abnormality prompt information is output.

[0233] Specifically, after the valve cover 102 is re-closed on the target explosion-proof valve 1, the interior of the battery pack 2 and the interior of the valve body 101 of the target explosion-proof valve 1 form a first closed chamber, and the inner cavity of the sealing cover 3 forms a second cavity. The first closed chamber and the second cavity are not connected to each other when the sealing is normal (specifically, the sealing between the valve cover 102 and the valve body 101 is normal); after the gas in the second chamber is discharged to the outside, an air pressure difference will be formed between the second cavity and the first closed chamber. If it is subsequently detected that the air pressure in the second cavity increases, it is possible that the gas in the first closed chamber leaked into the second cavity through the abnormal sealing position of the valve cover 102.

[0234] Based on the above considerations, after the gas in the second cavity is emptied, this embodiment obtains the second pressure change in the second cavity within a preset time and makes a judgment. If the second pressure change reaches the second change threshold, it means that a sealing abnormality may occur at the connection between the valve cover 102 and the valve body 101, thereby causing the gas in the first closed chamber to leak into the second cavity, causing the gas pressure in the second cavity to increase abnormally. At this time, the fourth abnormal prompt information can be output to remind the tester to intervene in time.

[0235] Specifically, the operation of obtaining the second pressure variation of the second cavity within a preset time can be achieved by detecting the air pressure variation of the inner cavity of the sealing cover 3 by the pressure tester 17 .

[0236] Based on the above arrangement, accurate detection of the sealing performance of the target explosion-proof valve 1 itself can be achieved.

[0237] Further, refer to Figures 5 to 8In an exemplary embodiment, the negative pressure device 10 is connected to the inner cavity of the adsorbent 4 and the sealing cover 3 respectively through two connecting passages, and the air supply device 9 is connected to the inner cavity of the adsorbent 4 and the sealing cover 3 respectively through two connecting passages; the first pressure sensor 15 is connected to the connecting passage between the air supply device 9 and the inner cavity of the sealing cover 3 and the connecting passage between the negative pressure device 10 and the inner cavity of the sealing cover 3. More specifically, the first pressure sensor 15 can be connected to the inner cavity of the sealing cover 3 by direct connection or indirect connection; the first pressure sensor 15 is used to obtain the first pressure in the connecting passage between the air supply device 9 and the inner cavity of the sealing cover 3. value, and the first pressure sensor 15 is used to obtain a second pressure value in the connection passage between the negative pressure device 10 and the inner cavity of the sealing cover 3; the second pressure sensor 16 is connected to the connection passage between the negative pressure device 10 and the adsorbent 4 and to the connection passage between the air supply device 9 and the adsorbent 4. More specifically, the second pressure sensor 16 can be connected to the adsorbent 4 by direct connection or indirect connection; the second pressure sensor 16 is used to obtain a third pressure value in the connection passage between the negative pressure device 10 and the adsorbent 4, and the second pressure sensor 16 is used to obtain a fourth pressure value in the connection passage between the air supply device 9 and the adsorbent 4.

[0238] The pressure tester 17 is connected to the inner cavity of the sealing cover 3 and can obtain the pressure change of the inner cavity of the sealing cover 3.

[0239] A first valve 18 is provided on the connecting passage between the air supply device 9 and the sealing cover 3, a second valve 19 is provided on the connecting passage between the negative pressure device 10 and the inner cavity of the sealing cover 3, a third valve 20 is provided on the connecting passage between the negative pressure device 10 and the adsorption component 4, and a fourth valve 21 is provided on the connecting passage between the air supply device 9 and the adsorption component 4.

[0240] Based on the above settings, refer to Figure 8 , and its corresponding complete air tightness test process is as follows: S1, vacuuming the adsorbent 4: driving the adsorbent 4 to fit with the valve cover 102, so that a closed chamber is formed between the adsorption cavity 401 of the adsorbent 4 and the valve cover 102; opening the third valve 20, and performing a negative pressure suction operation on the closed chamber between the adsorption cavity 401 and the valve cover 102 through the negative pressure device 10, so that the closed chamber forms a vacuum environment; during the negative pressure suction process, the pressure value (i.e., the third pressure value) of the closed chamber is detected by the second pressure sensor 16. If the third pressure value is not greater than the first pressure threshold, it means that the seal between the adsorbent 4 and the valve cover 102 is normal, and if the third pressure value is greater than the first pressure threshold, it means that the seal between the adsorbent 4 and the valve cover 102 is abnormal, and reassembly or abnormality analysis is required; S2, opening the valve cover 102: driving the adsorption member 4 to move, so as to drive the valve cover 102 to separate from the valve body 101 and enter the valve opening state; in the process of driving the valve cover 102 to open, according to the third pressure value obtained by the second pressure sensor 16, it can be accurately judged whether the valve cover 102 is pulled up and whether a false test occurs (i.e., the explosion-proof valve tooling and the target explosion-proof valve 1 are not correctly connected); S3, inflate the battery pack 2: open the first valve 18, and the gas supply device 9 sequentially fills the battery pack 2 with gas through the sealing cover 3 and the valve body 101; when the first pressure sensor 15 detects that the first pressure value reaches the third pressure threshold, the first valve 18 is closed, so that the gas supply device 9 stops the inflation operation; S4, first balancing operation: leaving the target explosion-proof valve 1 to stand for a preset time, so that the air pressure in the closed chamber formed by the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1, and the inner cavity of the sealing cover 3 tends to be balanced; S5, air tightness test of the battery pack 2: obtaining a first pressure change (specifically a pressure drop value) within a preset time in the inner cavity of the sealing cover 3 (i.e., the interior of the battery pack 2, the interior of the valve body 101 of the target explosion-proof valve 1, and the closed chamber formed by the inner cavity of the sealing cover 3) through the pressure tester 17, so as to detect the sealing performance of the battery pack 2; S6, the valve cover 102 is reset: the third valve 20 is closed, the fourth valve 21 is opened, and the gas supply device 9 supplies gas into the adsorption cavity 401 of the adsorption member 4, so that the negative pressure state of the closed chamber formed by the adsorption cavity 401 and the valve cover 102 disappears and enters a positive pressure state, thereby separating the valve cover 102 from the adsorption member 4, and the valve cover 102 can be reset to close with the valve body 101 under the elastic force of the spring, that is, the valve cover 102 is closed again, and then the fourth valve 21 is closed; S7, exhausting the sealing cover 3: in one embodiment, the second valve 19 is opened, and a negative pressure suction operation is directly performed on the inner cavity of the sealing cover 3 through the negative pressure device 10 to reduce the air pressure in the sealing cover 3; when the first pressure sensor 15 detects that the second pressure value reaches a fourth pressure threshold, the second valve 19 is closed; In another embodiment, the third valve 20 is opened, and the negative pressure device 10 performs a negative pressure suction operation on the adsorption member 4 to achieve the emptying of the gas in the inner cavity of the sealing cover 3; when the second pressure sensor 16 detects that the third pressure value reaches the fourth pressure threshold, the third valve 20 is closed; S8, second balancing operation: leaving the explosion-proof valve detection system to stand for a preset time so that the air pressure in the closed chamber formed by the inner cavity of the sealing cover 3 tends to be balanced; S9, air tightness test of the target explosion-proof valve 1: obtaining a second pressure change (specifically, a pressure rise value) of the inner cavity of the sealing cover 3 within a preset time through the pressure tester 17, so as to detect the sealing performance of the target explosion-proof valve 1 itself; S10, the air tightness test is completed.

[0241] It should be noted that other contents of the explosion-proof valve detection system and the operation method of the explosion-proof valve detection process disclosed in the present application can be referred to the prior art and will not be repeated here.

[0242] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. An explosion-proof valve detection system, characterized in that: The explosion-proof valve detection system includes a target explosion-proof valve, a negative pressure device, an air supply device and an explosion-proof valve tooling; the explosion-proof valve tooling includes: A sealing cover, the sealing cover is arranged at one end of the target explosion-proof valve provided with a valve cover; An adsorbent, the adsorbent is disposed in the sealing cover, and the adsorbent is connected to the negative pressure device; the negative pressure device is used to perform a suction operation on the adsorbent, so that the adsorbent adsorbs the valve cover under the action of negative pressure; a first driving member, the first driving member being in driving connection with the adsorption member; the first driving member being used to drive the adsorption member to move relative to the sealing cover so that the adsorption member contacts the valve cover and drives the valve cover to open; The air supply device is connected to the sealing cover, and is used to inflate the inner cavity of the sealing cover to perform an air tightness test when the valve cover is opened.

2. The explosion-proof valve detection system according to claim 1, characterized in that: The explosion-proof valve tooling also includes a second driving member, which is transmission-connected to the sealing cover; the second driving member is used to drive the sealing cover to move along a first direction so that the sealing cover covers or moves away from an end of the target explosion-proof valve where the valve cover is provided.

3. The explosion-proof valve detection system according to claim 1, characterized in that: The explosion-proof valve tooling further comprises a fixing bracket, wherein the fixing bracket is used to be fixedly connected to the valve body of the target explosion-proof valve, and the sealing cover is movably connected to the fixing bracket.

4. The explosion-proof valve detection system according to claim 1, characterized in that: A flexible buffer layer is provided at the opening of the sealing cover; when the sealing cover is provided at one end of the target explosion-proof valve provided with the valve cover, the flexible buffer layer is used to fit with the target explosion-proof valve.

5. The explosion-proof valve detection system according to claim 1, characterized in that: The explosion-proof valve tooling also includes an air-filling pipe, one end of which is communicated with the inner cavity of the sealing cover, and the other end of which is used to connect to an air supply device.

6. The explosion-proof valve detection system according to claim 1, characterized in that: The explosion-proof valve tooling further includes a first guide rod, which is slidably disposed in the sealing cover along a first direction, one end of the first guide rod is connected to the adsorption member, and the other end of the first guide rod is connected to the first driving member; The first driving member is used to drive the first guide rod to move along the first direction to drive the adsorption member to move.

7. The explosion-proof valve detection system according to claim 6, characterized in that: The explosion-proof valve tooling also includes a first elastic member, which is sleeved on the first guide rod and elastically supported between the adsorption member and the sealing cover.

8. The explosion-proof valve detection system according to claim 3, characterized in that: The explosion-proof valve tooling also includes a second driving member and a second guide rod, wherein the second driving member is in driving connection with the sealing cover; the second driving member is used to drive the sealing cover to move along a first direction so that the sealing cover covers or moves away from an end of the target explosion-proof valve provided with the valve cover; The second guide rod is slidably arranged in the fixed bracket along the first direction, one end of the second guide rod is connected to the sealing cover, and the other end of the second guide rod is connected to the second driving member; the second driving member is used to drive the second guide rod to move along the first direction to drive the sealing cover to move.

9. The explosion-proof valve detection system according to claim 8, characterized in that: The explosion-proof valve tooling also includes a second elastic member, which is sleeved on the second guide rod and elastically supported between the sealing cover and the fixing bracket.

10. The explosion-proof valve detection system according to claim 8, characterized in that: The second driving member includes a second cam portion and a second gripping portion, the second cam portion is rotatably connected to the second guide rod around a second axis, the second cam portion abuts against the fixed bracket, and the second axis is perpendicular to the first direction; the second gripping portion is connected to the second cam portion.

11. The explosion-proof valve detection system according to claim 8, characterized in that: The explosion-proof valve tooling further includes a first guide rod, which is slidably arranged in the sealing cover along the first direction, one end of the first guide rod is connected to the adsorption member, and the other end of the first guide rod is connected to the first driving member; The first driving member is used to drive the first guide rod to move along the first direction to drive the adsorption member to move; The second guide rod is a hollow structure, and the first guide rod is slidably connected to the inner cavity of the second guide rod along the first direction.

12. The explosion-proof valve detection system according to claim 11, characterized in that: The first driving member includes a first cam portion and a first holding portion, the first cam portion is rotatably connected to an end of the first guide rod facing away from the adsorption member around a first axis, the first cam portion abuts against the second guide rod, and the first axis is perpendicular to the first direction; the first holding portion is connected to the first cam portion.

13. The explosion-proof valve detection system according to claim 11, characterized in that: The adsorption component is provided with an adsorption cavity, the first guide rod is provided with an adsorption channel, and the second guide rod is provided with a connecting channel; the adsorption cavity is used to be arranged toward the valve cover, one end of the adsorption channel is communicated with the adsorption cavity, the other end of the adsorption channel is communicated with one end of the connecting channel, and the other end of the connecting channel is used to connect to a negative pressure device.

14. The explosion-proof valve detection system according to claim 2, characterized in that: The explosion-proof valve tooling also includes a fixed bracket, which is used to be fixedly connected to the valve body of the target explosion-proof valve, and the sealing cover is movably connected to the fixed bracket; the first driving member and the second driving member are both arranged outside the fixed bracket.

15. The explosion-proof valve detection system according to claim 3, characterized in that: The fixing bracket comprises a top wall and a side wall, wherein the side wall is arranged around the periphery of the top wall to form a receiving cavity, the sealing cover is arranged in the receiving cavity, and the receiving cavity is used to receive at least a part of the target explosion-proof valve.

16. The explosion-proof valve detection system according to claim 15, characterized in that: A limiting flange is protruding from an opening at one end of the side wall away from the top wall, and the limiting flange is used for snap-fitting into the limiting groove of the target explosion-proof valve.

17. The explosion-proof valve detection system according to claim 15, characterized in that: The explosion-proof valve tooling also includes an inflation pipe, which is slidably arranged in the top wall along a first direction, one end of the inflation pipe is connected to the inner cavity of the sealing cover, and the other end of the inflation pipe is used to connect to an air supply device.

18. The explosion-proof valve detection system according to claim 1, characterized in that: The negative pressure device is connected to the sealing cover, and is used to draw out the gas in the inner cavity of the sealing cover.

19. The explosion-proof valve detection system according to claim 1, characterized in that: The air supply device is connected to the adsorption member; the air supply device is used to inflate the adsorption member so that the adsorption member is separated from the valve cover under the action of positive pressure.

20. The explosion-proof valve detection system according to claim 1, characterized in that: The explosion-proof valve detection system further includes a second pressure sensor, which is used to obtain a third pressure value in the connection passage between the negative pressure device and the adsorption member.

21. The explosion-proof valve detection system according to claim 1, characterized in that: The explosion-proof valve detection system further includes a first pressure sensor, which is used to obtain a first pressure value in the connection passage between the air supply device and the sealing cover.

22. The explosion-proof valve detection system according to claim 18, characterized in that: The explosion-proof valve detection system further includes a first pressure sensor, which is used to obtain a second pressure value in the connection passage between the negative pressure device and the sealing cover.

23. The explosion-proof valve detection system according to claim 19, characterized in that: The explosion-proof valve detection system further includes a second pressure sensor, which is used to obtain a fourth pressure value in the connection passage between the air supply device and the adsorption member.

24. The explosion-proof valve detection system according to any one of claims 1 to 23, characterized in that: The explosion-proof valve detection system further comprises a pressure tester, and the pressure tester is used to obtain the pressure change of the inner cavity of the sealing cover within a preset time.

25. An operating method for an explosion-proof valve detection process, characterized in that: The operation method of the explosion-proof valve detection process includes the following steps: Driving the adsorption member to fit with the valve cover of the target explosion-proof valve, so that a first cavity is formed between at least a portion of the adsorption member and the valve cover; performing a suction operation on the first cavity; The adsorption member is driven to move, so as to drive the valve cover to open and expose the vent covered by the valve cover.

26. The method for operating the explosion-proof valve detection process according to claim 25, characterized in that: After the step of performing the suction operation on the first cavity, the operation method of the explosion-proof valve detection process further includes the following steps: After completing the suction operation for a preset time, obtaining a third pressure value in the first cavity; The step of driving the adsorption member to move comprises: When the third pressure value is not greater than the first pressure threshold, driving the adsorption component to move; When the third pressure value is greater than the first pressure threshold, first abnormal prompt information is output.

27. The method for operating the explosion-proof valve detection process according to claim 26, characterized in that: After the step of driving the adsorption member to move so as to drive the valve cover to open and expose the vent covered by the valve cover, the operation method of the explosion-proof valve detection process further includes the following steps: When the third pressure value increases to a second pressure threshold, a second abnormal prompt message is output; and the second pressure threshold is greater than the first pressure threshold.

28. The method for operating the explosion-proof valve detection process according to claim 25, characterized in that: After the step of driving the adsorption member to move so as to drive the valve cover to open and expose the vent covered by the valve cover, the operation method of the explosion-proof valve detection process further includes the following steps: The interior of the target explosion-proof valve is inflated through the vent.

29. The method for operating the explosion-proof valve detection process according to claim 28, characterized in that: Before the step of driving the adsorption member to fit the valve cover of the target explosion-proof valve, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve with a valve cover with a sealing cover; the adsorbent is arranged in the second cavity; The step of inflating the interior of the target explosion-proof valve through the vent includes: The second cavity is inflated with gas so that the inflated gas enters the interior of the target explosion-proof valve through the vent.

30. The method for operating the explosion-proof valve detection process according to claim 29, characterized in that: The step of inflating the second cavity so that the inflated gas enters the interior of the target explosion-proof valve through the vent, comprises: Acquire a first pressure value of the second cavity; When the first pressure value reaches a third pressure threshold, the inflation into the second cavity is stopped.

31. The method for operating the explosion-proof valve detection process according to claim 29, characterized in that: After the step of inflating the second cavity so that the inflated gas enters the interior of the target explosion-proof valve through the vent, the operation method of the explosion-proof valve detection process further includes the following steps: Obtaining a first pressure change of the second cavity within a preset time; When the first pressure change reaches a first change threshold, a third abnormal prompt information is output.

32. The method for operating the explosion-proof valve detection process according to claim 29, characterized in that: Before the step of obtaining the first pressure change amount of the second cavity within a preset time, the operation method of the explosion-proof valve detection process further includes the following steps: The target explosion-proof valve is left to stand for a preset time.

33. The method for operating the explosion-proof valve detection process according to claim 28, characterized in that: After the step of inflating the interior of the target explosion-proof valve through the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The suction operation on the adsorbent is stopped, so that the valve cover is separated from the adsorbent and is re-sealed on the vent.

34. The method for operating the explosion-proof valve detection process according to claim 33, characterized in that: The step of stopping the suction operation on the adsorbent, separating the valve cover from the adsorbent and resealing the vent includes: Inflate the adsorbent so that the valve cover is separated from the adsorbent under positive pressure and is re-sealed on the vent; The inflation operation of the adsorbent is stopped.

35. The method for operating the explosion-proof valve detection process according to claim 33, characterized in that: Before the step of driving the adsorption member to fit the valve cover of the target explosion-proof valve, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve with a valve cover with a sealing cover; the adsorbent is arranged in the second cavity; After the step of stopping the suction operation on the adsorbent, separating the valve cover from the adsorbent and resealing the vent, the operation method of the explosion-proof valve detection process further includes the following steps: The gas in the second cavity is discharged outward.

36. The method for operating the explosion-proof valve detection process according to claim 35, characterized in that: The step of discharging the gas in the second cavity to the outside comprises: Acquiring a second pressure value of the second cavity; When the second pressure value reaches a fourth pressure threshold, the gas in the second cavity is stopped from being discharged to the outside.

37. The method for operating the explosion-proof valve detection process according to claim 33, characterized in that: Before the step of driving the adsorption member to fit the valve cover of the target explosion-proof valve, the operation method of the explosion-proof valve detection process further includes the following steps: A second cavity is formed by covering the end of the target explosion-proof valve with a valve cover with a sealing cover; the adsorbent is arranged in the second cavity, and the adsorption end of the adsorbent is communicated with the second cavity; After the step of stopping the suction operation on the adsorbent, separating the valve cover from the adsorbent and resealing the vent, the operation method of the explosion-proof valve detection process further includes the following steps: A suction operation is performed on the adsorbent to discharge the gas in the second cavity outward.

38. The method for operating the explosion-proof valve detection process according to claim 37, characterized in that: The step of performing a suction operation on the adsorbent to discharge the gas in the second cavity to the outside includes: Acquiring a third pressure value of the suction channel of the adsorbent; When the third pressure value reaches a fourth pressure threshold, the suction operation on the adsorption element is stopped.

39. The method for operating the explosion-proof valve detection process according to claim 35 or 37, characterized in that: After the step of discharging the gas in the second cavity to the outside, the operation method of the explosion-proof valve detection process further includes the following steps: The target explosion-proof valve is left to stand for a preset time.

40. The method for operating the explosion-proof valve detection process according to claim 35 or 37, characterized in that: After the step of discharging the gas in the second cavity to the outside, the operation method of the explosion-proof valve detection process further includes the following steps: Obtaining a second pressure change of the second cavity within a preset time; When the second pressure change reaches a second change threshold, fourth abnormal prompt information is output.

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