Battery pack air tightness test tool

Abstract

According to the battery pack air tightness test tool provided by the utility model, the pressing rod can be driven to rotate around the rotating shaft through the elastic effect of the first elastic piece so as to drive the clamping piece to clamp the valve body of the explosion-proof pressure release valve, and the elastic mechanism is driven through the connecting rod mechanism so that the sealing cover and the explosion-proof pressure release valve are tightly attached. The cover body is adsorbed through the adsorption piece at the bottom of the sealing cover, so that the air pipe joint on the sealing cover is conveniently connected with an air outlet pipe of an air tightness tester for a battery pack air tightness test subsequently, the air tightness test of the battery pack can be completed without manually disassembling the anti-explosion pressure release valve, and the installation and the operation are convenient and simple; and gas leakage in the gas tightness test process can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack detection, in particular to an air tightness test tooling for a battery pack. Background Technique

[0002] With the rapid development and wide application of the new energy energy storage industry, the air tightness test of the battery pack is an essential link in the production and quality control process of the battery pack, and its quality is directly related to the safety, service life and performance stability of the battery pack. The air tightness test of the battery pack can detect and eliminate potential safety hazards that may occur during the production process, which is of extremely important significance for reducing the occurrence of safety accidents.

[0003] Most of the current battery packs on the market are equipped with explosion-proof pressure relief valves to balance the internal and external pressure differences of the battery pack. The explosion-proof pressure relief valve is the only interface on the battery pack that can achieve gas exchange. When performing the air tightness test on the battery pack, many manufacturers remove the explosion-proof pressure relief valve on the battery pack, and then insert the air outlet pipe of the air tightness test tooling into the battery pack through the installation hole of the explosion-proof pressure relief valve to test the air tightness of the battery pack. After the air tightness test is completed, the explosion-proof pressure relief valve is reinstalled on the battery pack. During the air tightness test, it is impossible to ensure that the air outlet pipe of the air tightness test tooling can be closely attached to the installation hole of the explosion-proof pressure relief valve, and it is also impossible to ensure the sealing performance between the explosion-proof pressure relief valve and its corresponding installation hole after installation, there is a certain leakage risk; and the repeated disassembly and assembly of the explosion-proof pressure relief valve not only makes the operation complex, but also affects the sealing performance between the explosion-proof pressure relief valve and the battery pack. Content of the Utility Model

[0004] The purpose of the utility model is to provide an air tightness test tooling for a battery pack to alleviate the above problems existing in the existing battery pack air tightness test technology.

[0005] A battery pack airtightness test tool provided by the present utility model is used for performing an airtightness test on a battery pack equipped with an explosion-proof pressure relief valve. The explosion-proof pressure relief valve includes a valve body and a cover body, and the cover body is arranged on the valve body. The battery pack airtightness test tool includes a main body, at least two fixing components are arranged on the outer side wall of the main body, and a sealing component is arranged inside the main body; each fixing component includes a pressing rod, a first elastic member, a rotating shaft and a clamping piece. The rotating shaft passes through the pressing rod and is fixedly arranged on the main body. One end of the first elastic member is fixedly connected to the pressing rod, and the other end of the first elastic member is fixedly connected to the main body. The position of the rotating shaft is below the end where the first elastic member is fixedly connected to the pressing rod. The clamping piece is fixedly arranged at the lower end of the pressing rod and is located below the bottom of the main body; the pressing rod is used to rotate around the rotating shaft under the elastic action of the first elastic member to drive the clamping piece to clamp the valve body; the sealing component includes a sealing cover that can slide up and down in the main body. An air pipe joint is arranged on the side wall of the sealing cover, and the air pipe joint is used to connect with the air outlet pipe of an airtightness tester. The top of the sealing cover is connected with a connecting rod mechanism through an elastic mechanism. The elastic mechanism is used to drive the sealing cover to approach and tightly adhere to the explosion-proof pressure relief valve under the drive of the connecting rod mechanism. An adsorbing member for adsorbing the cover body is arranged at the bottom of the sealing cover.

[0006] As a possible implementation, the elastic mechanism includes a connecting plate and at least one second elastic member. One end of each second elastic member is used to contact the bottom of the connecting plate, and the other end of each second elastic member is used to contact the top of the sealing cover. The connecting plate is used to contact each second elastic member and drive each second elastic member to contact the sealing cover under the drive of the connecting rod mechanism.

[0007] As a possible implementation, the connecting rod mechanism includes a connecting rod. One end of the connecting rod is provided with a connecting rod joint for contacting the top of the connecting plate.

[0008] As a possible implementation, the end of the connecting rod away from the connecting plate extends out of the main body and is provided with a quick clamp.

[0009] As a possible implementation, the elastic mechanism further includes a guiding shaft corresponding to each second elastic member. Each second elastic member is sleeved on its corresponding guiding shaft. One end of each guiding shaft passes through the connecting plate and is slidably connected to the connecting plate, and the other end of each guiding shaft is fixedly connected to the top of the sealing cover.

[0010] As a possible implementation, a sliding groove is arranged on the side wall of the main body, and the air pipe joint extends out of the main body through the sliding groove.

[0011] As a possible implementation, the at least two fixing components are uniformly distributed along the outer periphery of the outer side wall of the main body.

[0012] As a possible implementation, each of the fixing components further includes a rotating shaft seat fixedly arranged on the main body, and the rotating shaft passes through the rotating shaft seat and is fixedly arranged on the rotating shaft seat.

[0013] As a possible implementation, a rear cover is arranged on the top of the main body, and one end of the connecting rod away from the connecting plate passes through the rear cover and extends out of the main body; a front cover is arranged below the clamping piece at the bottom of the main body.

[0014] As a possible implementation, a sealing ring is further arranged at the bottom of the sealing cover.

[0015] A battery pack airtightness testing tool provided by the utility model can drive a pressure rod to rotate around a rotating shaft through the elastic action of a first elastic member to drive a clamping piece to clamp the valve body of an explosion-proof pressure relief valve, and drive an elastic mechanism through a link mechanism to make a sealing cover closely fit with the explosion-proof pressure relief valve, and then adsorb a cover body through an adsorbing member at the bottom of the sealing cover, so as to facilitate connecting an air pipe joint on the sealing cover with an air outlet pipe of an airtightness tester for battery pack airtightness testing subsequently. The airtightness testing of the battery pack can be completed without manually disassembling the explosion-proof pressure relief valve, the installation and operation are convenient and simple, and gas leakage during the airtightness testing process can be avoided. Description of the Drawings

[0016] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0017] Figure 1 It is a front view of a battery pack airtightness testing tool and an explosion-proof pressure relief valve in an embodiment of the utility model;

[0018] Figure 2 It is a three-dimensional view of a battery pack airtightness testing tool in an embodiment of the utility model;

[0019] Figure 3 It is a left side sectional view of a battery pack airtightness testing tool in an embodiment of the utility model;

[0020] Figure 4 It is an exploded view of a battery pack airtightness testing tool in an embodiment of the utility model.

[0021] Icons: 1 - Main body; 2 - Rear cover; 3 - Quick clamp; 4 - Link joint; 5 - Explosion-proof pressure relief valve; 6 - Clamping piece; 7 - Rotating shaft; 8 - Rotating shaft seat; 9 - First elastic member; 10 - Pressing rod; 11 - Air pipe joint; 12 - Adsorption member; 13 - Front cover; 14 - Sealing ring; 15 - Sealing cover; 16 - Connecting plate; 17 - Second elastic member; 18 - Gasket; 19 - Guide shaft; 20 - Connecting rod; 21 - Chute. Detailed implementation manners

[0022] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] See Figures 1 to 4 As shown, the embodiment of the present utility model provides a battery pack airtightness test tooling, which can be used for airtightness testing of a battery pack installed with an explosion-proof pressure relief valve 5. The explosion-proof pressure relief valve 5 can include a valve body and a cover body, and the cover body is arranged on the valve body. The battery pack airtightness test tooling can include a main body 1, and at least two fixing components are arranged on the outer side wall of the main body 1, and a sealing component is arranged inside the main body 1; each fixing component can include a pressing rod 10, a first elastic member 9, a rotating shaft 7 and a clamping piece 6. The rotating shaft 7 passes through the pressing rod 10 and is fixedly arranged on the main body 1. One end of the first elastic member 9 is fixedly connected to the pressing rod 10, and the other end of the first elastic member 9 is fixedly connected to the main body 1. The position where the rotating shaft 7 is located is below the end where the first elastic member 9 is fixedly connected to the pressing rod 10. The clamping piece 6 is fixedly arranged at the lower end of the pressing rod 10 and is located below the bottom of the main body 1; the pressing rod 10 can be used to drive the clamping piece 6 to clamp the valve body by rotating around the rotating shaft 7 under the elastic action of the first elastic member; the sealing component can include a sealing cover 15 that can slide up and down inside the main body 1. An air pipe joint 11 is arranged on the side wall of the sealing cover 15, and the air pipe joint 11 can be used to connect with the air outlet pipe of the airtightness tester. The top of the sealing cover 15 can be connected with a link mechanism through an elastic mechanism, and the elastic mechanism can be used to drive the sealing cover 15 to approach and tightly adhere to the explosion-proof pressure relief valve 5 under the drive of the link mechanism. An adsorption member 12 for adsorbing the cover body can be arranged at the bottom of the sealing cover 15.

[0024] Among them, the first elastic member 9 can adopt a spring or other elastic components, and the adsorption member 12 can adopt components such as a magnet or a suction cup that can adsorb the cover body of the explosion-proof pressure relief valve 5, and no limitation is imposed thereon.

[0025] A battery pack airtightness test tooling provided by the utility model can drive a pressure lever 10 to rotate around a rotating shaft 7 through the elastic action of a first elastic member 9 to drive a clamping piece 6 to clamp the valve body of an explosion-proof pressure relief valve 5, and drive an elastic mechanism through a connecting rod mechanism to make a sealing cover 15 closely fit with the explosion-proof pressure relief valve 5, and then adsorb a cover body through a suction attachment 12 at the bottom of the sealing cover 15, so as to facilitate connecting an air pipe joint 11 on the sealing cover 15 with an air outlet pipe of an airtightness tester for the airtightness test of the battery pack. The airtightness test of the battery pack can be completed without manually disassembling the explosion-proof pressure relief valve 5, and the installation and operation are convenient and simple, and gas leakage during the airtightness test can be avoided.

[0026] As a possible implementation manner, referring to Figure 1 、 Figure 2 and Figure 4 shown, the elastic mechanism may include a connecting plate 16 and at least one second elastic member 17. One end of each second elastic member 17 can be used to contact the bottom of the connecting plate 16, and the other end of each second elastic member 17 is used to contact the top of the sealing cover 15. The connecting plate 16 can be used to contact each second elastic member 17 under the drive of the connecting rod mechanism and drive each second elastic member 17 to contact the sealing cover 15.

[0027] Among them, the second elastic member 17 is similar to the first elastic member 9 and can adopt a spring or other elastic components, which is not limited herein.

[0028] With this design, the connecting rod mechanism can be used to drive the connecting plate 16 to contact the second elastic member 17 to drive the second elastic member 17 to contact the sealing cover 15, and then the elastic action of the second elastic member 17 is used to quickly make the sealing cover 15 closely fit with the explosion-proof pressure relief valve 5, so as to avoid gas leakage during the airtightness test.

[0029] As a possible implementation manner, referring to Figure 1 、 Figure 3 and Figure 4 shown, the connecting rod mechanism may include a connecting rod 20, and a connecting rod joint 4 for contacting the top of the connecting plate 16 may be provided at one end of the connecting rod 20. With this design, after the connecting rod 20 contacts the top of the connecting plate 16, the elastic mechanism can be driven by the connecting rod 20 to quickly make the sealing cover 15 closely fit with the explosion-proof pressure relief valve 5, so as to avoid gas leakage during the airtightness test.

[0030] As a possible implementation manner, referring to Figure 1 、 Figure 3 and Figure 4As shown, one end of the connecting rod 20 away from the connecting plate 16 can extend out of the main body 1 and can be provided with a quick clamp 3. With this design, relevant personnel can hold the quick clamp 3 to drive the connecting rod 20 to contact the top of the connecting plate 16, so as to drive the connecting plate 16 to contact the second elastic member 17 through the connecting rod 20, and then drive the second elastic member 17 to contact the sealing cover 15, thereby quickly making the sealing cover 15 fit tightly with the explosion-proof pressure relief valve 5 by the elastic action of the second elastic member 17, improving the convenience of relevant personnel to operate the airtightness test tooling of the battery pack for the airtightness test of the battery pack.

[0031] As a possible implementation manner, refer to Figure 1 、 Figure 3 and Figure 4 As shown, the elastic mechanism may further include a guide shaft 19 corresponding to each second elastic member 17. Each second elastic member 17 is sleeved on its corresponding guide shaft 19. One end of each guide shaft 19 passes through the connecting plate 16 and is slidably connected to the connecting plate 16, and the other end of each guide shaft 19 is fixedly connected to the top of the sealing cover 15. With this design, after the connecting rod 20 contacts the top of the connecting plate 16, the guide shaft 19 can play a guiding role in the movement of the connecting rod 20 driving the connecting plate 16, thereby improving the stability of the movement of the connecting plate 16; and after the connecting plate 16 contacts the second elastic member 17, the guide shaft 19 can play a guiding role in the elastic deformation of the second elastic member 17, thereby improving the stability of the elastic deformation direction of the second elastic member 17.

[0032] As a possible implementation manner, refer to Figure 1 、 Figure 2 and Figure 4 As shown, a chute 21 can be provided on the side wall of the main body 1, and the air pipe joint 11 can extend out of the main body 1 through the chute 21. With this design, the movement of the air pipe joint 11 extending out of the main body 1 can be limited through the chute 21 to ensure the stability of the movement of the air pipe joint 11, thereby facilitating the guarantee of the stability of the airtightness test of the battery pack.

[0033] As a possible implementation manner, refer to Figure 1 、 Figure 2 and Figure 4 As shown, at least two fixing components can be evenly distributed along the outer periphery of the outer side wall of the main body 1.

[0034] For example Figure 1 and Figure 4 As shown, two fixing components are evenly distributed along the outer periphery of the outer side wall of the main body 1, and the clamping pieces 6 of the two fixing components can be used together to clamp the valve body of the explosion-proof pressure relief valve 5.

[0035] With this design, the clamping pieces 6 of the fixing components uniformly distributed along the outer periphery of the outer wall of the main body 1 can jointly clamp the valve body of the explosion-proof pressure relief valve 5, thereby improving the stability of clamping the valve body of the explosion-proof pressure relief valve 5.

[0036] As a possible implementation, referring to Figure 1 、 Figure 2 and Figure 4 shown, each fixing component may further include a rotating shaft seat 8 fixedly arranged on the main body 1, and the rotating shaft 7 passes through the rotating shaft seat 8 and is fixedly arranged on the rotating shaft seat 8. With this design, the rotating shaft seat 8 can provide an installation position for the rotating shaft 7, and the position of the rotating shaft seat 8 arranged on the main body 1 can be flexibly adjusted, so that the stability and flexibility of the installation of the rotating shaft 7 can be further improved, thus facilitating the improvement of the stability and flexibility of the overall structure installation of the battery pack airtightness test tooling.

[0037] As a possible implementation, referring to Figures 1 to 4 shown, a rear cover 2 may be arranged on the top of the main body 1, and one end of the connecting rod 20 far from the connecting plate 16 passes through the rear cover 2 and extends out of the main body 1; a front cover 13 is arranged at the bottom of the main body 1 below the clamping piece 6. With this design, the components of the battery pack airtightness test tooling can be further protected by the rear cover 2 and the front cover 13, which is beneficial to extending the service life of the battery pack airtightness test tooling.

[0038] As a possible implementation, referring to Figures 2 to 4 shown, a sealing ring 14 may also be arranged at the bottom of the sealing cover 15. With this design, the sealing effect of the sealing ring 14 can be utilized to further ensure the tight fit between the sealing cover 15 and the explosion-proof pressure relief valve 5, thereby further avoiding gas leakage during the airtightness test.

[0039] In the actual application process, the connecting rod joint 4 and the connecting plate 16 can also be fixedly connected through a fixing member. For example Figure 1 、 Figure 3 and Figure 4 shown, the connecting rod joint 4 can be set to have an internal thread, and then the screw passes through the connecting plate 16 and is threadedly engaged with the internal thread of the connecting rod joint 4 to achieve the fixed connection between the connecting rod joint 4 and the connecting plate 16; in order to further avoid damage to the bottom surface of the connecting plate 16 by the screw, the screw can also pass through the gasket 18 and the connecting plate 16 in sequence from the bottom surface of the connecting plate 16 and then be threadedly engaged with the internal thread of the connecting rod joint 4.

[0040] For the convenience of understanding, here an example of specific application is used to exemplarily introduce the structure and working principle of the battery pack airtightness test tooling in the embodiment of the present invention as follows.

[0041] Referring to Figures 1 to 4As shown in the figure, the airtightness test tooling for the battery pack may include a main body 1. A rear cover 2 is fixedly connected to the top of the main body 1. A chute 21 is provided on the side wall of the main body 1. A front cover 13 is fixedly connected to the bottom of the main body 1;

[0042] Two fixing components are symmetrically distributed on the outer side wall of the main body 1 from left to right. Each fixing component may include a pressing rod 10, a first elastic member 9, a rotating shaft seat 8, a rotating shaft 7, and a clamping piece 6. The rotating shaft seat 8 is fixedly installed on the outer side wall of the main body 1 for installing the rotating shaft 7 and the pressing rod 10. The rotating shaft 7 and the pressing rod 10 are installed on the rotating shaft seat 8 by passing the rotating shaft 7 through the rotating shaft seat 8 and the pressing rod 10. A clamping piece 6 is fixedly installed at the lower end of the pressing rod 10, and the clamping piece 6 is located below the bottom of the main body 1. One end of the first elastic member 9 (using a spring, which can be denoted as the first spring) is fixedly connected to the pressing rod 10, and the other end of the first spring is fixedly connected to the main body 1. The position where the rotating shaft 7 is located is below the end where the first spring is fixedly connected to the pressing rod 10. The first spring is initially in a compressed state, and the elastic force of the first spring causes the part of the pressing rod 10 above the rotating shaft 7 to move away from the main body 1 along the second direction. Relevant personnel can press the part of the pressing rod 10 above the rotating shaft 7 along the second direction to further compress the first spring, causing the pressing rod 10 to rotate around the rotating shaft 7, so that the part of the pressing rod 10 below the rotating shaft 7 moves away from the main body 1 along the second direction, and then drives the clamping piece to move away from the main body 1 along the second direction. After the airtightness test tooling for the battery pack is docked with the explosion-proof pressure relief valve 5, the relevant personnel release the pressing rod 10, and use the elastic force of the first spring to lift the pressing rod 10, so that the part of the pressing rod 10 above the rotating shaft 7 moves away from the main body 1 along the second direction and at the same time the part of the pressing rod 10 below the rotating shaft 7 moves closer to the main body 1 along the second direction. Then, the two pressing rods 10 drive the two clamping pieces 6 to gather towards the middle to clamp the explosion-proof pressure relief valve 5, thereby fixedly connecting the airtightness test tooling for the battery pack to the explosion-proof pressure relief valve 5 installed on the battery pack;

[0043] The sealing cover 15 is slidably mounted up and down freely within the main body 1. An air pipe joint 11 is provided on the side wall of the sealing cover 15. The air pipe joint 11 is used for connecting with the air outlet pipe of the airtightness tester, and the air pipe joint 11 extends out of the main body 1 through the sliding groove 21. A sealing ring 14 and an adsorbing member 12 (a magnet is used) are mounted on the bottom surface of the sealing cover 15. The adsorbing member 12 is used for adsorbing the cover body of the explosion-proof pressure relief valve 5 (a material that can be adsorbed by a magnet is used), and the sealing ring 14 is used for sealing the contact between the sealing cover 15 and the explosion-proof pressure relief valve 5. Three guide shafts 19 and three second elastic members 17 (springs are used, which can be denoted as second springs) are fixedly mounted on the top of the sealing cover 15. Each second spring is sleeved on its corresponding guide shaft 19 respectively. The top of the connecting plate 16 is used for contacting with one end of the connecting rod 20 provided with the connecting rod joint 4. One end of each guide shaft 19 passes through the connecting plate 16 and the connecting plate 16 can slide along the guide shaft 19. A limiting block is further provided at the end of each guide shaft 19 passing through the connecting plate 16. The limiting block is used for limiting the sliding of the connecting plate 16 along the guide shaft 19. The three guide shafts 19 and the three second springs are connected with the connecting plate 16 to form an elastic mechanism. The end of the connecting rod 20 away from the connecting plate 16 passes through the rear cover 2 and extends out of the main body 1 and is fixedly connected with a quick clamp 3.

[0044] When the relevant personnel press the quick clamp 3 in the first direction, the elastic mechanism is driven by the connecting rod to contact the explosion-proof pressure relief valve 5 in the first direction. The elastic force of the second spring can keep the sealing cover 15 tightly attached to the explosion-proof pressure relief valve 5 to achieve a good sealing effect. The magnet adsorbs and opens the cover body of the explosion-proof pressure relief valve 5, thereby connecting the battery pack airtightness test tooling with the inside of the battery pack. After connecting the air pipe joint 11 with the air outlet pipe of the airtightness tester, the airtightness test of the battery pack can be carried out.

[0045] After the airtightness test of the battery pack is completed, the relevant personnel hold the quick clamp 3 and drive the elastic mechanism and the sealing cover to move in the first direction to disengage from the explosion-proof pressure relief valve 5. The cover body of the explosion-proof pressure relief valve 5 rebounds towards the valve body and closes the explosion-proof pressure relief valve 5 again. The relevant personnel can press the part of the pressure rod 10 above the rotating shaft 7 in the second direction to further compress the first spring, so that the pressure rod 10 rotates around the rotating shaft 7, making the part of the pressure rod 10 below the rotating shaft 7 move away from the main body 1 in the second direction, and then driving the clamping piece to move away from the main body 1 in the second direction. After the relevant personnel disconnect the battery pack airtightness test tooling from the explosion-proof pressure relief valve 5, the operation process ends.

[0046] The utility model connects the explosion-proof pressure relief valve 5 on the battery pack and the air outlet pipe of the airtightness tester respectively through the airtightness test tooling for the battery pack. The airtightness test of the battery pack can be completed without disassembling the explosion-proof pressure relief valve 5, and the operation is convenient and simple, avoiding gas leakage. The utility model moves the sealing cover 15 along the first direction in the main body 1, compresses the second spring of the elastic mechanism through the quick clamp 3, and the elastic force of the second spring can be used to conveniently and quickly fit the sealing cover 15 with the explosion-proof pressure relief valve 5 to prevent air leakage during the airtightness test of the battery pack. The utility model can conveniently and quickly install the airtightness test tooling for the battery pack onto the explosion-proof pressure relief valve 5 through the combination of the pressure rod 10, the first spring, the rotating shaft 7, the rotating shaft seat 8 and the clamping piece 6, making the airtightness test of the battery pack more convenient and fast.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack airtightness test tooling for performing an airtightness test on a battery pack equipped with an explosion-proof pressure relief valve, the explosion-proof pressure relief valve including a valve body and a cover body, the cover body being disposed on the valve body, characterized in that, The airtightness test tooling for the battery pack includes a main body, on the outer sidewall of which there are provided at least two fixing components, and inside the main body there is provided a sealing component; each of the fixing components includes a pressing rod, a first elastic member, a rotating shaft and a clamping piece, the rotating shaft passes through the pressing rod and is fixedly arranged on the outer sidewall of the main body, one end of the first elastic member is fixedly connected to the pressing rod, the other end of the first elastic member is fixedly connected to the main body, the position where the rotating shaft is located is below the end where the first elastic member is fixedly connected to the pressing rod, the clamping piece is fixedly arranged at the lower end of the pressing rod and is located below the bottom of the main body; the pressing rod is used to rotate around the rotating shaft under the elastic action of the first elastic member to drive the clamping piece to clamp the valve body; the sealing component includes a sealing cover slidably arranged up and down in the main body, on the sidewall of the sealing cover there is provided an air pipe joint, the air pipe joint is used to be connected to the air outlet pipe of the airtightness tester, the top of the sealing cover is connected with a connecting rod mechanism through an elastic mechanism, the elastic mechanism is used to drive the sealing cover to approach and tightly adhere to the explosion-proof pressure relief valve under the drive of the connecting rod mechanism, and at the bottom of the sealing cover there is provided an adsorbing member for adsorbing the cover body.

2. The airtightness test tooling for the battery pack according to claim 1, wherein The elastic mechanism includes a connecting plate and at least one second elastic member, one end of each second elastic member is used to contact the bottom of the connecting plate, and the other end of each second elastic member is used to contact the top of the sealing cover, and the connecting plate is used to contact each second elastic member and drive each second elastic member to contact the sealing cover under the drive of the connecting rod mechanism.

3. The airtightness test tooling for the battery pack according to claim 2, characterized in that The connecting rod mechanism includes a connecting rod, and at one end of the connecting rod there is provided a connecting rod joint for contacting the top of the connecting plate.

4. The airtightness test tooling for the battery pack according to claim 3, characterized in that, The end of the connecting rod away from the connecting plate extends out of the main body and is provided with a quick clamp.

5. The airtightness test tooling for the battery pack according to claim 2, wherein, The elastic mechanism further includes a guide shaft corresponding to each second elastic member, each second elastic member is sleeved on its corresponding guide shaft, one end of each guide shaft passes through the connecting plate and is slidably connected to the connecting plate, and the other end of each guide shaft is fixedly connected to the top of the sealing cover.

6. The airtightness test tooling for the battery pack according to claim 1, wherein, There is provided a chute on the sidewall of the main body, and the air pipe joint extends out of the main body through the chute.

7. The airtightness test tooling for the battery pack according to claim 1, wherein The at least two fixing components are uniformly distributed along the outer periphery of the outer sidewall of the main body.

8. The airtightness test tooling for the battery pack according to claim 1, wherein Each of the fixing components further includes a rotating shaft seat fixedly arranged on the main body, and the rotating shaft passes through the rotating shaft seat and is fixedly arranged on the rotating shaft seat.

9. The airtightness test tooling for the battery pack according to claim 4, wherein There is provided a rear cover on the top of the main body, and the end of the connecting rod away from the connecting plate passes through the rear cover and extends out of the main body; there is provided a front cover below the clamping piece at the bottom of the main body.

10. The airtightness test tooling for the battery pack according to any one of claims 1-9, characterized in that, There is also provided a sealing ring at the bottom of the sealing cover.

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