Airtightness detection sealing mechanism

Abstract

The utility model relates to a battery detection device, and provides an airtight detection sealing mechanism comprising a first sealing member (4) and a second sealing member which are respectively arranged on two sides of a member to be detected so as to form sealing spaces on two sides of the member to be detected. And the sealing space is used for filling detection gas for sealing detection. According to the utility model, the sealing performance of the to-be-detected member during sealing detection is ensured, the sealing effect is prolonged, the shutdown wiping frequency in the detection process is avoided, and the productivity is improved.

Description

Technical Field

[0001] The utility model relates to battery testing equipment, in particular to an airtight testing sealing mechanism. Background Art

[0002] During the manufacturing process of the power battery cover, the explosion-proof valve and the pole need to be welded to the cover. Since the cover, explosion-proof valve and pole are all made of metal, metal dust is easily generated during welding. If the dust removal effect is not good, it will cause tiny leaks in the welds around the cover, explosion-proof valve and pole. Therefore, it is necessary to conduct a sealing test on this defective cover, that is, to detect the weld positions of the explosion-proof valve and the pole.

[0003] Helium inspection of battery covers mainly uses helium as a tracer gas. The helium inspection fixture is vacuumed and then helium is injected into the fixture containing the product to be inspected. The leakage of the product is determined by the helium detector. When performing helium inspection of battery covers, the battery covers need to be sealed. However, the existing technology has poor sealing effect when there is a lot of metal dust, resulting in a high rate of false discharge. Therefore, it is necessary to frequently stop the machine to wipe the sealing ring. The number of wiping times is large, and special personnel are required to wipe the sealing ring, which greatly reduces production capacity. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an airtight detection sealing mechanism to ensure the sealing of the battery cover during helium inspection, prolong the sealing effect, avoid the number of shutdowns for wiping during the inspection process, and improve production capacity.

[0005] In order to solve the above technical problems, the utility model provides an airtight detection sealing mechanism, including a first seal and a second seal, the first seal and the second seal are used to be respectively arranged on both sides of the object to be tested to form a sealed space on both sides of the object to be tested, and the sealed space is used for filling with detection gas for sealing detection.

[0006] In some specific embodiments of the present invention, a first chamber jig and a second chamber jig are further included, wherein the first chamber jig and the second chamber jig are respectively arranged on both sides of the object to be inspected to clamp the object to be inspected, a first chamber is provided on a side of the first chamber jig close to the object to be inspected, and a second chamber is provided on a side of the second chamber jig close to the object to be inspected, the first sealing member is provided between the first chamber jig and the object to be inspected to form the sealed space between the first chamber and the object to be inspected, and a second sealing member is provided between the second chamber jig and the object to be inspected to form the sealed space between the second chamber and the object to be inspected.

[0007] In some specific embodiments of the present invention, the part to be inspected is a battery cover plate, and the two sides of the battery cover plate are respectively a first side surface and a second side surface, the first side surface is the surface where the boss structure on the battery cover plate is located, the first seal is arranged between the first chamber fixture and the first side surface, the first seal is formed with an inner circle for accommodating the boss structure on the battery cover plate, and the second seal is arranged between the second chamber fixture and the second side surface.

[0008] In some specific embodiments of the present invention, the second sealing member includes:

[0009] A pole sealing ring, the pole sealing ring is used to correspond to the pole arrangement on the battery cover; and / or

[0010] An explosion-proof valve sealing ring, the explosion-proof valve sealing ring is used to correspond to the explosion-proof valve arrangement on the battery cover; and / or

[0011] The liquid injection hole sealing ring is used to correspond to the arrangement of the liquid injection holes on the battery cover.

[0012] In some specific embodiments of the present invention, a sealing cover plate is further included. The sealing cover plate is arranged on the first sealing member and connected to the first chamber fixture. The sealing cover plate is formed with a through groove, and the through groove is used to accommodate the battery cover plate.

[0013] In some specific embodiments of the present invention, the through slot forms a limiting block, and the limiting block is used to laterally position the battery cover.

[0014] In some specific embodiments of the present invention, a seal positioning pin and / or a pressure cover positioning pin are further included. The seal positioning pin is arranged between the first seal and the first chamber fixture to form a positioning, and the pressure cover positioning pin is arranged between the seal cover plate and the first chamber fixture to form a positioning.

[0015] In some specific embodiments of the present invention, the first chamber fixture comprises a mounting plate, on which a guide pillar is disposed, and the second chamber fixture is provided with a guide sleeve, and the guide sleeve is used for slidingly cooperating with the guide pillar.

[0016] In some specific embodiments of the present invention, the second chamber fixture is provided with an elastic return member, and the elastic return member is used to be installed on the battery cover to provide a force to move the battery cover away from the second chamber fixture.

[0017] Through the above scheme, the beneficial effects of the utility model are as follows:

[0018] The airtight detection sealing mechanism provided by the utility model is respectively provided with a first sealing member and a second sealing member, so that the first sealing member and the second sealing member can be respectively provided on both sides of the battery cover plate, thereby forming a sealed space on both sides of the battery cover plate, so that the detection gas can be filled into the sealed space on one side of the battery cover plate, so as to be able to perform a sealing detection. Since a seal is formed on both sides of the battery cover plate, when the corresponding sealing member on one side of the battery cover plate has a poor sealing effect due to metal dust, the corresponding sealing member on the other side can ensure the sealing performance, thereby prolonging the sealing effect, effectively reducing the false discharge rate, reducing the frequency of shutdown and wiping, reducing the difficulty of maintenance, and improving production capacity.

[0019] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of a specific embodiment of the airtight detection sealing mechanism of the utility model;

[0022] Figure 2 is a schematic diagram of the structure of the first chamber fixture;

[0023] Figure 3 is a schematic diagram of the structure of the second chamber fixture;

[0024] Figure 4 This is a cross-sectional view of a specific embodiment of the airtight detection sealing mechanism of the utility model in a clamp-closed state;

[0025] Figure 5 is a top view of the first chamber fixture;

[0026] Figure 6 It is a bottom view of the second chamber fixture.

[0027] Description of Reference Numerals

[0028] 1. Mounting plate; 2. First chamber fixture; 3. Sealing cover plate; 4. First seal; 5. Guide pillar; 6. Battery cover plate; 7. Sealing locating pin; 8. Pressure cover locating pin; 9. Second chamber fixture; 10. Bushing 1; 11. Bushing 2; 13. Explosion-proof valve sealing ring; 14. Pole sealing ring; 15. Anti-sticking plunger; 16. Helium detection sealing ring; 17. Compression spring; 18. Circlip; 19. Filling hole sealing ring; 20. Limit block. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation modes described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the specific implementation modes described below.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "formed", "provided with", "set", "connected" and the like should be understood in a broad sense. For example, the connection can be a direct connection or an indirect connection through an intermediate medium, a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate connection member, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] In the present utility model, in the absence of corresponding explanations, the directions or positional relationships indicated by the directional words "upper", "lower", "inside" and "outside" are based on the directions or positional relationships shown in the drawings, and are only used to facilitate the description of the present utility model and simplify the description, rather than to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model; the directional terms of the present utility model should be understood in conjunction with the actual installation status.

[0032] The existing technology for helium inspection of battery cover plates is mainly single-sided sealing. Since the dust generated by the front-end welding process is not cleaned up, after a certain number of helium inspection products, the single-sided sealed seal will be attached with dust, resulting in poor sealing effect, micro-leakage, high mis-discharge rate, and the seal needs to be wiped frequently. To this end, the utility model provides an airtight detection sealing mechanism, including a first seal 4 and a second seal, the first seal 4 and the second seal are preferably sealing rings, wherein the first seal 4 and the second seal are used to be respectively arranged on both sides of the part to be inspected to form a sealed space on both sides of the part to be inspected, and the sealed space is used for filling the detection gas for sealing detection. It should be noted that the types of the above-mentioned parts to be inspected and the detection gas are not used as limitations on the protection scope of the utility model. For example, the part to be inspected can be a battery cover plate, and the detection gas can be helium. For the convenience of understanding and explanation, the technical solution of the utility model is described in detail below in conjunction with the specific embodiment of the battery cover plate helium inspection.

[0033] See also Figures 1 to 6As a specific embodiment of the airtight detection sealing mechanism of the utility model, it includes a first chamber fixture 2 and a second chamber fixture 9, the first chamber fixture 2 and the second chamber fixture 9 are respectively arranged on both sides of the battery cover plate to clamp the battery cover plate 6, the first chamber fixture 2 is provided with a first chamber on the side close to the battery cover plate 6, and the second chamber fixture 9 is provided with a second chamber on the side close to the battery cover plate 6. A first sealing member 4 is provided between the first chamber fixture 2 and the battery cover plate 6 to form a sealed space between the first chamber and the battery cover plate 6, the inner circle of the first sealing member 4 forms a space for accommodating the boss structure on the back side of the battery cover plate 6, and a second sealing member is provided between the second chamber fixture 9 and the battery cover plate 6 to form a sealed space between the second chamber and the battery cover plate 6.

[0034] It should be noted that the two sides of the battery cover 6 are respectively the first side and the second side. The second side of the battery cover 6 refers to the side where the pole and the explosion-proof valve are located, and the first side of the battery cover 6 is the side opposite to the second side. There is a boss structure on the first side of the battery cover 6, and the boss structure is opposite to the back position of the pole, the explosion-proof valve and the injection hole. It is impossible to set a seal corresponding to the back position of the pole, the explosion-proof valve and the injection hole. The utility model is provided with an inner ring for accommodating the boss structure on the battery cover 6 on the first seal 4, so that the first seal 4 can be adapted to the edge of the first side of the battery cover 6, and the back position of the pole, the explosion-proof valve and the injection hole is sealed as a whole. When it is necessary to perform helium inspection on the battery cover 6, the battery cover 6 is placed corresponding to the first seal 4 and the second seal, and then the first chamber fixture 2 and the second chamber fixture 9 are driven to move closer to each other through a power source (hydraulic cylinder, air cylinder, electric cylinder and linear motor, etc.), so as to compress the first seal 4 and the second seal, and complete the double-sided sealing of the battery cover 6. One of the first chamber and the second chamber can be directly connected to the helium source, so that helium can be delivered to one of the first chamber and the second chamber, and the other can be connected to a helium detector for micro-leak detection. After multiple tests, even when the corresponding seal on one side of the battery cover 6 has a poor sealing effect due to metal dust, the corresponding seal on the other side can ensure the sealing, thereby extending the sealing effect, effectively reducing the error rate, reducing the frequency of shutdown wiping, reducing the difficulty of maintenance, and improving production capacity.

[0035] It should be noted that the distance between the edge of the battery cover 6 and the boss structure may be too small. For example, the gap between the edge of the battery cover 6 and the boss structure is less than 0.6 mm, which makes sealing difficult. In order to ensure the reliability of the seal, the first seal 4 preferably adopts a rectangular sealing ring (a sealing ring with a rectangular cross-section) to increase the sealing area through surface contact, and the distance between the inner circle of the first seal 4 and the edge of the battery cover 6 is preferably set at 0.5-0.55 mm.

[0036] Specifically, see Figure 2 The second seal is composed of a plurality of seal rings, including a pole seal ring 14 for corresponding to the pole arrangement on the battery cover 6, an explosion-proof valve seal ring 13 for corresponding to the explosion-proof valve arrangement on the battery cover 6, and an injection hole seal ring 19 for corresponding to the injection hole arrangement on the battery cover 6. When the second chamber fixture 9 is pressed down on the second side of the battery cover 6, the pole weld is in the circle of the pole seal ring 14, the explosion-proof valve weld is in the circle of the explosion-proof valve seal 13, and the injection hole weld is in the circle of the injection hole seal ring 19, so that the pole, explosion-proof valve and injection hole on the second side of the battery cover 6 are sealed respectively, and the formed sealed spaces are respectively connected to the second chamber, so that they can be connected to the helium detector for detection. Preferably, a sealing ring can be further provided between the second chamber fixture 9 and the second side of the battery cover 6, and the pole sealing ring 14, the explosion-proof valve sealing ring 13 and the injection hole sealing ring 19 are all located inside the sealing ring, thereby forming a three-layer seal in conjunction with the first sealing ring 4, further extending the sealing effect.

[0037] As a specific embodiment of the present invention, see Figure 1 , Figure 2 , Figure 4 and Figure 5 The helium detection sealing mechanism of the utility model also includes a sealing cover plate 3 located between the first chamber fixture 2 and the second chamber fixture 9. The sealing cover plate 3 is pressed on the first sealing member 4 and connected to the first chamber fixture 2, so that the first sealing member 4 can be fixed to avoid the relative position of the first sealing member 4 and the first chamber fixture 2 from changing and affecting the sealing effect. The sealing cover plate 3 is formed with a through groove for accommodating the battery cover plate 6, which is convenient for assembling the battery cover plate 6.

[0038] See also Figure 2 and Figure 5 A limit block 20 for laterally positioning the battery cover 6 is formed on the side wall of the through groove. When the battery cover 6 is subjected to helium inspection, the battery cover 6 can be first placed in the through groove, and the limit blocks 20 corresponding to different positions on the side of the battery cover 6 cooperate with each other, so that the battery cover 6 can be laterally positioned, so that when the battery cover 6 is pressed on the first sealing member 4, no misalignment occurs, thereby ensuring the sealing effect.

[0039] As a specific implementation, see Figure 2 and Figure 5 The edge of the limit block is an arc-shaped edge, which can guide the battery cover 6. When the battery cover 6 is placed in the through groove of the sealing cover 3, the arc-shaped edge can guide the side of the battery cover 6, which can avoid the unevenness of the battery cover 6 during assembly and effectively reduce the crushing rate of the battery cover 6.

[0040] As a specific implementation, see Figure 2 and Figure 5 , and also includes a sealing locating pin 7 and / or a pressure cover locating pin 8. The first sealing member 4 is formed with a pin hole corresponding to the sealing locating pin 7, so that the first sealing member 4 is positioned and installed on the first chamber fixture 2 through the sealing locating pin 7, and the first sealing member 4 will be deformed inward after being pressed during the helium inspection. Due to the presence of the sealing locating pin 7, its inward deformation amount can be reduced, and the risk of the first sealing member 4 deforming inward and pinching the boss structure on the second side of the battery cover 6 is reduced; after the first sealing member 4 is positioned, the sealing cover 3 is positioned and installed on the first chamber fixture 2 through the pressure cover locating pin 8. Specifically, the sealing cover 3 and the first chamber fixture 2 can be fixed by screws so that the sealing cover 3 is pressed on the first sealing member 4, and the relative positions among the sealing cover 3, the first sealing member 4 and the second chamber fixture 2 are confirmed.

[0041] As a specific implementation, see Figures 1 to 3 The first chamber fixture 2 is mounted on the mounting plate 1, and the mounting plate 1 is provided with a guide pillar 5. The second chamber fixture 9 is provided with a bushing that slides with the guide pillar 5, so that the second chamber fixture 9 moves in the up and down direction relative to the first chamber fixture 2. The number of guide pillars 5 can be set to multiple, such as Figure 1 As shown, two guide pillars 5 are provided on the mounting plate 1, and are respectively located at the two ends of the mounting plate 1, and a bushing 10 and a bushing 2 11 are correspondingly provided on the second chamber fixture 9. By inserting the guide pillar 5 into the bushing, the first chamber fixture 2 and the second chamber fixture 9 can only move along the axial direction (up and down direction) of the guide pillar 5, thereby avoiding misalignment of the seals between the first chamber fixture 2 and the second chamber fixture 9 and the battery cover 6 during the pressing process, thereby ensuring the sealing effect.

[0042] It should be noted that after the helium inspection is completed, the first side and the second side of the battery cover 6 will both adhere to the corresponding seals, and during the blanking process of the battery cover 6, if the second side is not completely separated from the second seal, it will cause damage to the battery cover 6. In order to avoid this risk, the second chamber fixture 9 is provided with an elastic reset member, which is used to abut on the battery cover 6 to provide an elastic force to drive the battery cover 6 to move away from the second chamber fixture 9, so that the battery cover 6 can be separated from the second chamber fixture 9. Specifically, the elastic reset member includes a compression spring 17, which is arranged in the second chamber, and the compression spring 17 is used to abut on the pole of the battery cover 6.

[0043] Furthermore, the compression spring 17 is used to resist the end of the pole of the battery cover 6 and is provided with an anti-sticking plunger 15, through which the anti-sticking plunger 15 contacts the battery cover 6 to avoid adhesion. The second chamber fixture 9 is formed with a guide hole for the anti-sticking plunger 15 to slide, and the compression spring 17 is sleeved in the guide hole, and the compression spring 17 is provided with a clamping spring 18 mounted in the guide hole at one end away from the anti-sticking plunger 15. The clamping spring 18 is preferably a C-shaped clamping spring. The end is fixed to facilitate the compression spring 17 to apply elastic force to the anti-sticking plunger 15, so that the anti-sticking plunger 15 pushes the battery cover 6 downward. A through hole connected to the guide hole is set in the middle of the anti-sticking plunger 15. The guide hole is in the second chamber, that is, the space formed between the anti-sticking plunger 15 and the battery cover 6 is connected to the second chamber. When a tiny leak occurs at this part of the battery cover 6, helium can flow through the tiny leak and then through the through hole to the second chamber, so that it can be detected by the helium detector. In addition, preferably, see Figure 4 and Figure 6 The anti-sticking plunger 15 is arranged corresponding to the pole, and the structural strength of the pole is relatively large, which can prevent the anti-sticking plunger 15 from pushing other places to cause deformation and damage of the battery cover 6.

[0044] Also, see Figure 1 , Figure 3 and Figure 4 The side of the second chamber fixture 9 away from the battery cover 6 will be used to install a helium detector for detection. In order to ensure the accuracy of the detection result of the helium detector, a helium detection sealing ring 16 is provided on the side of the second chamber fixture 9 away from the battery cover 6 to form a seal between the helium detector and the second chamber.

[0045] In order to better understand the technical solution of the airtight detection sealing mechanism of the present invention, its working principle is explained below in combination with relatively preferred technical features.

[0046] See also Figures 1 to 6The utility model airtight detection sealing mechanism comprises a first chamber fixture 2 and a second chamber fixture 9, and the first sealing member 4 is positioned by the sealing member cover plate 3 to avoid misalignment among the first sealing member 4, the sealing member cover plate 3 and the first chamber fixture 2. The battery cover plate 6 to be detected can be accurately pressed on the first sealing member 4 under the lateral positioning of the limit block of the sealing member cover plate 3, and the boss structure on the first side surface of the battery cover plate 6 is just placed in the inner circle space of the first sealing member 4, so that the first side surface of the battery cover plate 6 is integrally sealed by the first sealing member 4, and the second chamber fixture 9 cooperates with the bushing and the guide pillar 5, so that the power source drives the first chamber fixture 2 and the second chamber fixture 9 to move closer to each other, so as to clamp the battery cover plate 6 in the middle. During the process, the pole seal 14, explosion-proof valve seal 13 and injection hole seal 19 on the second chamber fixture 9 are respectively opposite to the pole weld, explosion-proof valve weld and injection hole weld on the second side of the battery cover 6, ensuring the seal between the second side of the battery cover 6 and the second chamber. When the double-sided seal of the battery cover 6 is in place, helium is filled into the first chamber, and the second chamber is connected to the helium detector to perform micro-leakage detection on the battery cover 6. Since the helium detection sealing mechanism of the utility model performs double-layer sealing on the first side and the second side of the battery cover 6, even if one layer has a poor sealing effect due to metal dust, the other layer of sealing can still ensure the sealing, thereby extending the sealing effect, eliminating the need for frequent shutdown for wiping, reducing maintenance difficulty, and improving production capacity. In addition, after the helium inspection of the battery cover 6 is completed, during the separation process of the first chamber jig 2 and the second chamber jig 9, the anti-sticking plunger 15 can push down the pole part of the battery cover 6 under the elastic force of the compression spring 17, so that the battery cover 6 can be separated from the second chamber jig 9, effectively reducing the risk of the battery cover 6 being crushed due to the failure of the battery cover 6 to separate from the seal.

[0047] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0049] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An airtight detection sealing mechanism, characterized in that: It comprises a first sealing member (4) and a second sealing member, wherein the first sealing member (4) and the second sealing member are respectively arranged on both sides of the object to be tested to form a sealed space on both sides of the object to be tested, and the sealed space is used for filling a test gas to perform a sealing test.

2. The airtight detection sealing mechanism according to claim 1, characterized in that: The invention also comprises a first chamber jig (2) and a second chamber jig (9), wherein the first chamber jig (2) and the second chamber jig (9) are respectively arranged on both sides of the object to be inspected to clamp the object to be inspected, a first chamber is arranged on a side of the first chamber jig (2) close to the object to be inspected, and a second chamber is arranged on a side of the second chamber jig (9) close to the object to be inspected, the first sealing member (4) is arranged between the first chamber jig (2) and the object to be inspected to form the sealed space between the first chamber and the object to be inspected, and a second sealing member is arranged between the second chamber jig (9) and the object to be inspected to form the sealed space between the second chamber and the object to be inspected.

3. The airtight detection sealing mechanism according to claim 2, characterized in that: The part to be inspected is a battery cover (6), and the two sides of the battery cover (6) are respectively a first side surface and a second side surface, the first side surface is the surface where the boss structure on the battery cover (6) is located, the first sealing member (4) is arranged between the first chamber fixture (2) and the first side surface, the first sealing member (4) is formed with an inner ring for accommodating the boss structure on the battery cover (6), and the second sealing member is arranged between the second chamber fixture (9) and the second side surface.

4. The airtight detection sealing mechanism according to claim 3, characterized in that: The second sealing member comprises: A pole sealing ring (14), the pole sealing ring (14) being used to correspond to the pole arrangement on the battery cover plate (6); and / or an explosion-proof valve sealing ring (13), the explosion-proof valve sealing ring (13) being used to correspond to the explosion-proof valve arrangement on the battery cover plate (6); and / or A liquid injection hole sealing ring (19), wherein the liquid injection hole sealing ring (19) is used to correspond to the arrangement of the liquid injection holes on the battery cover plate (6).

5. The airtight detection sealing mechanism according to claim 3, characterized in that: It also includes a sealing cover plate (3), which is arranged on the first sealing member (4) and connected to the first chamber fixture (2), and the sealing cover plate (3) is formed with a through groove, which is used to accommodate the battery cover plate (6).

6. The airtight detection sealing mechanism according to claim 5, characterized in that: The through slot forms a limiting block (20), and the limiting block (20) is used to laterally position the battery cover plate (6).

7. The airtight detection sealing mechanism according to claim 5, characterized in that: It also includes a sealing member positioning pin (7) and / or a pressure cover positioning pin (8), wherein the sealing member positioning pin (7) is arranged between the first sealing member (4) and the first chamber fixture (2) to form a positioning, and the pressure cover positioning pin (8) is arranged between the sealing member cover plate (3) and the first chamber fixture (2) to form a positioning.

8. The airtight detection sealing mechanism according to claim 2, characterized in that: The first chamber fixture (2) comprises a mounting plate (1), on which a guide pillar (5) is arranged, and the second chamber fixture (9) is provided with a guide sleeve, which is used for slidingly cooperating with the guide pillar (5).

9. The airtight detection sealing mechanism according to claim 3, characterized in that: The second chamber jig (9) is provided with an elastic reset member, and the elastic reset member is used to be installed on the battery cover (6) to provide a force to move the battery cover (6) away from the second chamber jig (9).

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