Connector for power battery detection and method of using the same

Abstract

The application belongs to the technical field of engineering elements, and particularly relates to a pipe joint, especially a connecting head for power battery detection and a use method thereof. The connecting head for power battery detection comprises a connecting male head, a fixing ring and a fixing sheet, one end of the fixing sheet is hingedly connected to the side wall of the fixing ring and extends along the axial direction of the connecting male head; an adjusting ring is slidably sleeved on the outer wall of the connecting male head; a sealing convex ring is sleeved on the outer wall of the end of the connecting male head away from the fixing sheet; a nut sleeve is slidably sleeved on the outer wall of the connecting hose, and an inspection opening is formed in the nut sleeve; when connected, the nut sleeve is sleeved on the outer wall of the connecting hose, the connecting hose is inserted into the outer wall of the connecting male head until the end wall abuts against the fixing ring, the nut sleeve is axially moved and threadedly fixed with the fixing sheet to double-seal the connecting hose; when disassembled, the adjusting ring is axially moved towards the fixing ring, the fixing sheet is turned towards the axial center of the connecting male head to be separated from the locking of the nut sleeve, and the connecting hose is axially moved outwards to be separated from the connecting male head.

Description

Technical Field

[0001] This invention belongs to the field of engineering component technology, specifically relating to pipe fittings, and more particularly to connectors for power battery testing and their usage methods. Background Technology

[0002] The development of the hydrogen energy industry is driving the large-scale application of hydrogen fuel cells. The testing process requires a sealed connection via a hose and quick-connect fitting to ensure stable hydrogen transmission and testing safety. The high testing pressure of hydrogen fuel cells (up to 1–35 MPa) and the frequent insertion and removal of quick-connect fittings make them prone to leaks. Existing quick-connect fittings rely on O-rings or lip seals, which are susceptible to aging, scratches, and deformation. Wear of the locking mechanism also reduces the clamping force.

[0003] Besides inherent structural shortcomings, numerous factors during operation further exacerbate the sealing problem: during testing, the connecting hose is prone to twisting and bending, leading to misalignment of the connection angle between the quick-connect fitting and the hose, compromising the sealing surface's fit accuracy and causing seal failure. If the quick-connect fitting is not fully inserted, or if dust, impurities, or other foreign matter adhere to the sealing surface, the seal will be further compromised. Furthermore, existing technologies lack effective visual leak detection mechanisms, requiring operators to rely on specialized equipment for inspection. This is not only inefficient and time-consuming but also results in the accumulation of hydrogen leaks due to the inability to detect and address them promptly. Even minor leaks can trigger serious safety incidents, posing significant safety risks to the testing process.

[0004] More importantly, during the disassembly of the quick-connect coupling after testing, residual pressure and hydrogen often remain inside the connecting hose, and most existing quick-connect couplings use a screw-on disassembly method. If the operator operates improperly (such as forcefully or quickly disassembling), severe friction will occur between the coupling and the hose, which will generate static sparks, igniting the hydrogen and causing a safety accident.

[0005] In summary, existing quick connectors suffer from poor sealing reliability, high leakage risk, and significant safety hazards during disassembly, failing to meet testing requirements. Developing a connector for power battery testing and its usage method has become an urgent problem to be solved in this field.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Summary of the Invention

[0007] This disclosure provides at least one connector for testing power batteries and a method for using the same.

[0008] In a first aspect, embodiments of this disclosure provide a connector for testing a power battery, comprising:

[0009] The male connector is located on the side wall of the detection device;

[0010] A retaining ring is fitted onto the outer wall of the male connector.

[0011] A fixing plate, one end of which is hinged to the side wall of the fixing ring and extends axially along the connecting male head, and each fixing plate has an external thread on its outer wall;

[0012] The adjusting ring is slidably sleeved on the outer wall of the connecting male, and one end of the outer wall abuts against the inner wall of the fixing plate;

[0013] A sealing ring is fitted onto the outer wall of the end of the male connector away from the fixing plate, and the outer wall abuts against the inner wall of the connecting hose.

[0014] A nut sleeve is slidably fitted onto the outer wall of the connecting hose, and its inner wall has an internal thread adapted to the external thread; an inspection port is provided on the nut sleeve.

[0015] During connection, the nut sleeve is fitted onto the outer wall of the connecting hose, the connecting hose is inserted into the outer wall of the connecting male until the end wall abuts against the fixing ring, and the nut sleeve moves axially and is threadedly fixed to the fixing plate to achieve a double seal for the connecting hose;

[0016] During disassembly, the adjusting ring moves axially toward the fixing ring, the fixing plate flips toward the axis of the connecting male to disengage from the locking of the nut sleeve, and the connecting hose moves axially outward to disengage from the connecting male.

[0017] In one optional embodiment, the outer diameter of the sealing ring is not greater than the outer diameter of the fixing plate, wherein when the connecting hose is inserted into the connecting male and passes over the sealing ring, the sealing ring forms a double seal.

[0018] In one optional embodiment, a compression ring is provided on the inner end wall of the nut sleeve near the sealing protrusion;

[0019] A telescopic groove is provided on one side wall of the sealing ring near the extrusion ring;

[0020] When the nut sleeve is threadedly fixed to the fixing plate, the compression ring compresses the connecting hose to deform and fit into the expansion groove to form a double seal.

[0021] In one alternative embodiment, a receiving groove is formed at the intersection of the other side wall of the sealing ring and the connecting male end;

[0022] When hydrogen leaks outward from between the outer wall of the male connector and the inner wall of the connecting hose, the receiving annular groove is suitable for temporarily storing hydrogen.

[0023] In one optional embodiment, an adjusting ring groove is formed on the inner wall of the connecting hose, and the distance from the adjusting ring groove to the end of the connecting hose is the same as the distance from the fixing ring to the sealing protrusion.

[0024] In one alternative embodiment, an elastic element is provided on the side of the fixing ring away from the connecting hose, the outer end of the elastic element abutting against the adjusting ring, and the elastic element is adapted to push the adjusting ring to move away from the fixing ring.

[0025] In one alternative embodiment, the fixing piece is arc-shaped, and its inner diameter gradually decreases from one end near the fixing ring to the other end.

[0026] In one optional embodiment, the inner end of the adjusting ring is provided with an inclined surface near the outer wall of the fixing plate, and the fixing plate abuts against the inclined surface when it is rotated inward with the hinge point as the axis.

[0027] In one optional embodiment, a limiting block is provided on the outer wall of the male connector corresponding to the adjusting ring, and the limiting block is used to limit the axial movement stroke of the adjusting ring.

[0028] In one optional embodiment, the inner diameter of the connecting hose is adapted to the outer diameter of the connecting male, wherein when the connecting hose is sleeved on the connecting male, the inner wall of the connecting hose and the outer wall of the connecting male are elastically sealed.

[0029] Secondly, this disclosure also provides a method for using a connector for testing a power battery, the method comprising:

[0030] During connection, the nut sleeve is fitted onto the outer wall of the connecting hose, and the connecting hose is inserted into the outer wall of the connecting male until the end wall abuts against the retaining ring. The nut sleeve moves axially and is fixed by the thread of the retaining plate to achieve a double seal for the connecting hose.

[0031] During disassembly, the adjusting ring moves axially toward the fixing ring, the fixing plate flips toward the axis of the connecting male to disengage from the locking of the nut sleeve, and the connecting hose moves axially outward to disengage from the connecting male.

[0032] The beneficial effects of this invention are as follows: This invention provides a connector for power battery testing and its usage method. It solves the problem of easy seal failure in traditional connectors through a double-sealing structure, improving sealing reliability; it features an inspection port and a receiving ring groove, allowing for direct detection and temporary storage of leaked hydrogen, enabling rapid leak investigation and reducing safety risks; during disassembly, the adjusting ring unlocks the connector, avoiding frictional static electricity from screw disassembly and eliminating the risk of ignition by residual pressure hydrogen; the threaded engagement of the fixing plate and nut sleeve, along with the elastic element and limiting block, ensures connection stability, preventing poor sealing caused by hose twisting or misalignment, adapting to the testing needs of frequent insertion and removal, and overall improving the safety and efficiency of power battery testing.

[0033] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 A perspective view of a power battery testing connector provided in an embodiment of this disclosure;

[0037] Figure 2 A perspective view of the male connector and the connecting hose provided in an embodiment of this disclosure;

[0038] Figure 3 A cross-sectional perspective view of the male connector and the connecting hose provided in an embodiment of this disclosure;

[0039] Figure 4 This is a front view of the nut sleeve fixing connection hose provided in an embodiment of this disclosure;

[0040] Figure 5 This is a schematic diagram of the inward flipping state of the fixing piece provided in an embodiment of this disclosure.

[0041] In the picture:

[0042] 1. Connecting male connector; 10. Limiting block;

[0043] 2. Retaining ring; 21. Elastic element;

[0044] 3. Fixing plate; 30. External thread;

[0045] 4. Adjusting ring; 40. Inclined plane;

[0046] 5. Sealing protrusion ring; 51. Expansion groove; 52. Receiving ring groove;

[0047] 6. Nut sleeve; 60. Inspection port; 61. Extrusion ring;

[0048] 7. Connect the hose; 70. Adjust the ring groove;

[0049] 8. Detection device. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0052] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify an entire column of elements when following a column of elements. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0053] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0054] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0055] Research has found that the development of the hydrogen energy industry is driving the large-scale application of hydrogen fuel cells. The testing process requires a sealed connection via a hose and quick-connect fitting to ensure stable hydrogen transmission and testing safety. The high testing pressure of hydrogen fuel cells (up to 1–35 MPa) and the frequent insertion and removal of quick-connect fittings make them high-risk points for leaks. Existing quick-connect fittings rely on O-rings or lip seals, which are prone to aging, scratches, and deformation. Wear of the locking mechanism also reduces the clamping force.

[0056] Besides inherent structural shortcomings, numerous factors during operation further exacerbate the sealing problem: during testing, the connecting hose is prone to twisting and bending, leading to misalignment of the connection angle between the quick-connect fitting and the hose, compromising the sealing surface's fit accuracy and causing seal failure. If the quick-connect fitting is not fully inserted, or if dust, impurities, or other foreign matter adhere to the sealing surface, the seal will be further compromised. Furthermore, existing technologies lack effective visual leak detection mechanisms, requiring operators to rely on specialized equipment for inspection. This is not only inefficient and time-consuming but also results in the accumulation of hydrogen leaks due to the inability to detect and address them promptly. Even minor leaks can trigger serious safety incidents, posing significant safety risks to the testing process.

[0057] More importantly, during the disassembly of the quick-connect coupling after testing, residual pressure and hydrogen often remain inside the connecting hose, and most existing quick-connect couplings use a screw-on disassembly method. If the operator operates improperly (such as forcefully or quickly disassembling), severe friction will occur between the coupling and the hose, which will generate static sparks, igniting the hydrogen and causing a safety accident.

[0058] In summary, existing quick connectors suffer from poor sealing reliability, high leakage risk, and significant safety hazards during disassembly, failing to meet testing requirements. Developing a connector for power battery testing and its usage method has become an urgent problem to be solved in this field.

[0059] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0060] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0061] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0062] like Figures 1 to 5 As shown, at least one embodiment provides a connector for testing power batteries. This connector is suitable for connecting hydrogen transmission pipelines in high-pressure testing scenarios (1-35MPa) of hydrogen fuel cell power batteries. It is assembled on the side wall of the testing device 8. Its structure includes a male connector 1, a fixing ring 2, a fixing plate 3, an adjusting ring 4, a sealing convex ring 5, and a nut sleeve 6. It is adapted for use with a connecting hose 7. The components work together to achieve high-pressure sealing, convenient disassembly and assembly, and leakage prevention. The structure, working principle, and usage method are described in detail below:

[0063] like Figure 1 The male connector 1 is fixed to the side wall of the detection device 8. The male connector 1 is hollow inside, and its inner end is connected to the connecting pipe of the detection device 8. Figure 3 A fixing ring 2 is coaxially sleeved on the outer wall of the male connector 1. An elastic element 21 is installed on the side of the fixing ring 2 away from the connecting hose 7. The outer end of the elastic element 21 abuts against the adjusting ring 4 which is slidably sleeved on the outer wall of the male connector 1. A limiting block 10 is provided on the outer wall of the male connector 1 corresponding to the adjusting ring 4 to limit the axial movement stroke of the adjusting ring 4. The inner end of the adjusting ring 4 is machined with a bevel 40 near the outer wall of the fixing piece 3.

[0064] like Figure 2 and Figure 3The fixing piece 3 has an arc-shaped structure, with one end hinged to the side wall of the fixing ring 2 and extending axially along the connecting male head 1. Its inner diameter gradually decreases from the end near the fixing ring 2 to the other end. The outer wall is machined with external threads 30, and the inner wall of the fixing piece 3 abuts against the outer wall of one end of the adjusting ring 4. There are multiple fixing pieces 3, and the multiple fixing pieces 3 are evenly distributed circumferentially around the outer wall of the connecting male head 1, with a gap between adjacent fixing pieces 3. When the adjusting ring 4 is pushed outward by the elastic element 21 and slides to abut against the limiting block 10, the inner end of the adjusting ring 4 abuts against the inner wall of the minimum inner diameter of the fixing piece 3, so that the fixing piece 3 is in a state of parallel connection to the outer wall of the male connector 1, that is, each fixing piece 3 is in the shape of a ring. When the nut sleeve 6 is screwed into the outer wall of the male connector 1 and the fixing ring 2, the external thread 30 of the outer wall of the fixing piece 3 is adapted to the thread of the inner wall of the nut sleeve 6, thereby achieving the effect of fixing the nut sleeve 6. When the nut sleeve 6 is fixed, its inner wall squeezes the outer wall of the connecting hose 7 located at the sealing ring, forming a second seal, further improving the sealing performance between the connecting hose 7 and the male connector 1. Figure 2 and Figure 3 In the diagram, F1 indicates the direction of hydrogen flow, that is, hydrogen flows from the male connector 1 to the hose 7.

[0065] like Figure 3A sealing ring 5 is coaxially fitted on the outer wall of the end of the male connector 1 away from the fixing plate 3. Its outer diameter is not greater than the outer diameter of the fixing plate 3. When the connecting hose 7 is fitted on the outer wall of the male connector 1 and expands and deforms to fit outside the sealing ring 5, when the nut sleeve 6 is screwed into the outer wall of the fixing ring 2 and the fixing plate 3, the inner wall of the nut sleeve 6 can squeeze the connecting hose 7 located on the outer wall of the sealing ring 5. A telescopic groove 51 is provided on one side wall of the sealing convex ring 5 (away from the fixed ring 2), and a receiving ring groove 52 is provided at the intersection of the other side wall and the connecting male head 1. The nut sleeve 6 is slidably sleeved on the outer wall of the connecting hose 7, and the inner wall is machined with an internal thread that matches the external thread 30. A compression ring 61 is fixed on the inner end wall near the sealing convex ring 5. When the connecting hose 7 is sleeved on the outer wall of the connecting male head 1 and the end abuts against the side wall of the fixed ring 2, the nut sleeve 6 moves towards the connecting male head 1 and is fixed to the external thread 30 on the side wall of the fixing plate 3. The compression ring 61 compresses the connecting hose 7, causing it to elastically deform into the telescopic groove 51. The compression seal at this point forms the first seal, thereby improving the airtightness between the connecting hose 7 and the outer wall of the connecting male head 1. The nut sleeve 6 has an inspection port 60 on its side wall, and the connecting hose 7 has an adjusting ring groove 70 on its inner wall. The distance from the adjusting ring groove 70 to the end of the connecting hose 7 is the same as the distance from the fixing ring 2 to the sealing protrusion 5. The inner diameter of the connecting hose 7 is adapted to the outer diameter of the connecting male connector 1, so that the inner wall and the outer wall of the connecting male connector 1 can be elastically sealed after being fitted. When the end of the connecting hose 7 abuts against the side wall of the fixing ring 2, the adjusting ring groove 70 corresponds to the receiving ring groove 52. When hydrogen leaks and breaks through the first and second seals, it will temporarily stop at the adjusting ring groove 70 and the receiving ring groove 52 and form a local expansion at that point. This expansion is due to the thinning of the connecting hose 7 at this point. At this time, by pressing this area through the inspection port 60 and judging whether it expands, it can be determined whether the hydrogen has broken through the first two seals.

[0066] The working principle of the connector used for power battery testing is as follows:

[0067] like Figure 4 This connector utilizes a double-seal design to prevent high-pressure leakage. The first seal is formed by the compression fit between the sealing ring 5 and the connecting hose 7. When the connecting hose 7 is inserted into the male connector 1 and passes over the sealing ring 5, the sealing ring 5 expands and deforms under pressure, tightly fitting the inner wall of the connecting hose 7 and blocking radial hydrogen leakage. The second seal is formed by the deformation fit between the compression ring 61, the expansion groove 51, and the connecting hose 7. When the nut sleeve 6 and the fixing plate 3 are threaded together, the compression ring 61 compresses the connecting hose 7 towards the sealing ring 5, causing the hose to deform and embed into the expansion groove 51, achieving a secondary sealing fit. Simultaneously, the receiving annular groove 52 can temporarily store a small amount of leaked hydrogen, preventing rapid accumulation of leakage. Combined with the inspection port 60 of the nut sleeve 6, operators can visually observe whether there is a leak, allowing for quick troubleshooting without specialized equipment.

[0068] like Figure 5 When disassembling and unlocking, the adjusting ring 4 moves axially toward the fixed ring 2. As the inner end of the adjusting ring 4 gradually moves away from the inner wall of the fixed piece 3, it pushes the fixed piece 3 to flip toward the axis of the connecting male head 1, so that the external thread 30 of the fixed piece 3 disengages from the internal thread of the nut sleeve 6, achieving frictionless unlocking and avoiding static electricity generation. The elastic element 21 can normally push the adjusting ring 4 to move away from the fixed ring 2, ensuring the locking state of the fixed piece 3 and preventing unauthorized unlocking.

[0069] At least one embodiment provides a method of using a connector for testing a power battery, the method comprising:

[0070] During connection, the nut sleeve 6 is fitted onto the outer wall of the connecting hose 7, and the connecting hose 7 is inserted into the outer wall of the connecting male 1 until the end wall abuts against the fixing ring 2. The nut sleeve 6 moves axially and is threadedly fixed to the fixing plate 3 to achieve a double seal for the connecting hose 7.

[0071] During disassembly, the adjusting ring 4 moves axially toward the fixing ring 2, the fixing plate 3 flips toward the axis of the connecting male 1 to disengage from the locking of the nut sleeve 6, and the connecting hose 7 moves axially outward to disengage from the connecting male 1.

[0072] In this embodiment, the elastic element 21 is preferably a compression spring, the sealing convex ring 5 is made of elastic rubber material that is resistant to high pressure and hydrogen corrosion, and the fixing plate 3 is made of high-strength alloy material to ensure structural stability and service life under high pressure testing environment. The cooperation of each component realizes the sealing reliability, disassembly and assembly convenience and use safety of pipeline connection during power battery testing.

[0073] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0074] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0075] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A connector for testing power batteries, characterized in that, include: The male connector (1) is located on the side wall of the detection device (8); A retaining ring (2) is fitted onto the outer wall of the connecting male head (1); Multiple fixing pieces (3), each fixing piece (3) has one end hinged to the side wall of the fixing ring (2) and extends along the axial direction of the connecting male head (1), and each fixing piece (3) has an external thread (30) on its outer wall. The fixing pieces (3) are arc-shaped, and the multiple fixing pieces (3) are evenly distributed around the outer wall of the connecting male head (1). Adjusting ring (4) is slidably sleeved on the outer wall of connecting male head (1), and one end of the outer wall abuts against the inner wall of fixing piece (3); A sealing ring (5) is fitted onto the outer wall of the end of the connecting male (1) away from the fixing piece (3), and the outer wall abuts against the inner wall of the connecting hose (7); The nut sleeve (6) is slidably sleeved on the outer wall of the connecting hose (7), and the inner wall is provided with an internal thread that matches the external thread (30); an inspection port (60) is provided on the nut sleeve (6). During connection, the nut sleeve (6) is fitted on the outer wall of the connecting hose (7), the connecting hose (7) is inserted into the outer wall of the connecting male (1) until the end wall abuts against the fixing ring (2), the nut sleeve (6) moves axially and is threadedly fixed to the fixing plate (3) to double seal the connecting hose (7). During disassembly, the adjusting ring (4) moves axially toward the fixing ring (2), the fixing plate (3) flips toward the axis of the connecting male (1) to disengage from the locking with the nut sleeve (6), and the connecting hose (7) moves axially outward to disengage from the connecting male (1). A compression ring (61) is provided on the inner end wall of the nut sleeve (6) near the sealing protrusion (5); A telescopic groove (51) is provided on one side wall of the sealing convex ring (5) near the extrusion ring (61); When the nut sleeve (6) is threadedly fixed to the fixing plate (3), the compression ring (61) compresses the connecting hose (7) to deform and fit into the telescopic groove (51) to form a double seal. A receiving groove (52) is provided at the intersection of the other side wall of the sealing convex ring (5) and the connecting male head (1). When hydrogen leaks outward from between the outer wall of the male connector (1) and the inner wall of the connecting hose (7), the receiving annular groove (52) is suitable for temporary storage of hydrogen. An elastic element (21) is provided on the side of the fixed ring (2) away from the connecting hose (7). The outer end of the elastic element (21) abuts against the adjusting ring (4). The elastic element (21) is adapted to push the adjusting ring (4) to move away from the fixed ring (2).

2. The connector for testing power batteries as described in claim 1, characterized in that, The outer diameter of the sealing convex ring (5) is not greater than the outer diameter of the fixing plate (3). When the connecting hose (7) is inserted into the connecting male head (1) and passes over the sealing convex ring (5), the sealing convex ring (5) squeezes the connecting hose (7) to expand and deform to form a seal.

3. The connector for testing power batteries as described in claim 1, characterized in that, An adjusting ring groove (70) is provided on the inner wall of the connecting hose (7). The distance between the adjusting ring groove (70) and the end of the connecting hose (7) is the same as the distance between the fixing ring (2) and the sealing protrusion (5).

4. The connector for testing power batteries as described in claim 1, characterized in that, The inner diameter of the fixing piece (3) gradually decreases from one end near the fixing ring (2) to the other end.

5. The connector for testing power batteries as described in claim 4, characterized in that, The inner end of the adjusting ring (4) is provided with an inclined surface (40) near the outer wall of the fixing plate (3). When the fixing plate (3) is rotated inward with the hinge point as the axis, it abuts against the inclined surface (40).

6. The connector for testing power batteries as described in claim 1, characterized in that, A limiting block (10) is provided on the outer wall of the connecting male head (1) at the position corresponding to the adjusting ring (4). The limiting block (10) is used to limit the axial movement stroke of the adjusting ring (4).

7. The connector for testing power batteries as described in claim 1, characterized in that, The inner diameter of the connecting hose (7) is adapted to the outer diameter of the connecting male (1), wherein when the connecting hose (7) is fitted onto the connecting male (1), the inner wall of the connecting hose (7) and the outer wall of the connecting male (1) are elastically sealed.

8. A method of using a connector for testing a power battery, characterized in that, The method of using the power battery testing connector as described in any one of claims 1-7 includes: During connection, the nut sleeve (6) is fitted on the outer wall of the connecting hose (7), the connecting hose (7) is inserted into the outer wall of the connecting male (1) until the end wall abuts against the fixing ring (2), the nut sleeve (6) moves axially and is threadedly fixed to the fixing plate (3) to double seal the connecting hose (7). During disassembly, the adjusting ring (4) moves axially toward the fixing ring (2), the fixing plate (3) flips toward the axis of the connecting male (1) to disengage from the locking with the nut sleeve (6), and the connecting hose (7) moves axially outward to disengage from the connecting male (1).

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