Exhaust device, testing device and combined testing device

Abstract

The utility model provides an exhaust device, a testing device and a combined testing device, the exhaust device is used for guiding gas in a battery monomer to a testing instrument, and the exhaust device comprises a main pipe body and a connecting pipe body. The main pipe body comprises connecting parts and first fastening parts which are distributed at intervals along the extending direction of the main pipe body, and the connecting parts are configured to be connected with the battery monomers; the connecting pipe body is communicated with the main pipe body, the connecting pipe body comprises a second fastening part and a third fastening part which are distributed at intervals in the extending direction of the connecting pipe body, the second fastening part is detachably connected with the first fastening part, and the third fastening part is configured to be connected with a test instrument. According to the exhaust device provided by the embodiment of the invention, the use flexibility is improved, the test time is saved, and the test cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an exhaust device, a testing device, and a combined testing device. Background Art

[0002] Battery cells are widely used in electronic devices, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and electric tools, etc. Battery cells can include nickel-cadmium battery cells, nickel-hydrogen battery cells, ion battery cells, and secondary alkaline zinc-manganese battery cells, etc.

[0003] During the battery development process, the battery needs to be tested for various performance aspects. Among them, cycle testing, as a basic performance test, is widely used in the evaluation of battery life and other aspects. How to save testing time and reduce testing costs is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides an exhaust device, a testing device and a combined testing device. The exhaust device is conducive to improving the flexibility of use, saving testing time and reducing testing costs.

[0005] In a first aspect, the present application provides an exhaust device for guiding the gas in a battery cell to a testing instrument, the exhaust device comprising: a main pipe body, comprising a connecting portion and a first fastening portion spaced apart along its own extension direction, the connecting portion being configured to be connected to the battery cell; a connecting pipe body, connected to the main pipe body, the connecting pipe body comprising a second fastening portion and a third fastening portion spaced apart along its own extension direction, the second fastening portion being detachably connected to the first fastening portion, and the third fastening portion being configured to be connected to the testing instrument.

[0006] In some embodiments of the first aspect, the exhaust device includes a main pipe body and a connecting pipe body that are connected to each other. The main pipe body is used to connect the battery cell, and the connecting pipe body is used to connect the test instrument, so that the gas produced inside the battery cell during the cycle test can enter the test instrument through the main pipe body and the connecting pipe body in sequence, and the gas production inside the battery cell can be obtained through the test instrument. By providing a detachable main pipe body and connecting pipe body, the length of the exhaust device can be increased, so that the battery cell can be connected to the exhaust device for gas production detection while being connected to other components for other parameter detection. The exhaust device will not interfere with other components, so that the battery cell can obtain different parameters in the same cycle test, which is beneficial to saving test time and reducing test costs. In addition, connecting pipe bodies of different lengths can be set to be used in combination with the main pipe body to adapt to various test environments, which is beneficial to improving the flexible use of the exhaust device.

[0007] In some embodiments, the outer peripheral surface of the third fastening portion is provided with protrusions or grooves that are spaced apart along the extending direction of the main pipe body; alternatively, the outer peripheral surface of the third fastening portion is provided with a threaded structure. By setting it in this way, it is beneficial to improve the flexibility of use of the exhaust device.

[0008] In some embodiments, the exhaust device further includes an elastic pipe body that communicates with the connecting pipe body. One side of the elastic pipe body along its own extending direction is detachably connected to the first fastening portion, and the other side is configured to be connected to a testing instrument. By setting it in this way, it is convenient to connect the connecting pipe body and the testing instrument.

[0009] In some embodiments, the exhaust device further includes a sealing pipe body that communicates between the connecting pipe body and the elastic pipe body. The sealing pipe body includes a sealing portion and an insertion pipe that are connected along its own extending direction. The sealing portion is detachably connected to the third fastening portion, and the elastic pipe body is sleeved on the outer periphery of the insertion pipe. By setting it in this way, it is beneficial to improve the diversity of the exhaust device.

[0010] In some embodiments, the sealing portion is sleeved on the outer periphery of the third fastening portion. By setting it in this way, it is convenient for assembly and beneficial to improve the flexible use of the exhaust device.

[0011] In some embodiments, the sealing portion includes a sealing component and a limiting component. The sealing component is detachably connected to the third fastening portion. The limiting component is connected to the side of the sealing component facing the insertion pipe and is sleeved on the outer periphery of the insertion pipe. The limiting component protrudes from the outer peripheral surface of the sealing component and the outer peripheral surface of the insertion pipe. The limiting component can play a role of limiting and positioning during the assembly process of the exhaust device, which is convenient for assembly.

[0012] In some embodiments, the ratio of the length dimension d1 of the connecting pipe body along its own extending direction to the length dimension d2 of the main pipe body along its own extending direction satisfies: 1 / 3 ≤ d1 / d2 ≤ 2 / 3. Such a design is beneficial to reducing the manufacturing cost of the exhaust device and is beneficial to improving the diversity of the exhaust device.

[0013] In some embodiments, one of the first fastening portion and the second fastening portion is sleeved on the outer periphery of the other. The first fastening portion and the second fastening portion can be detachably connected by sleeving, which is convenient for assembly and positioning.

[0014] In some embodiments, the first fastening portion and the second fastening portion are threadedly connected. By setting it in this way, it is convenient for assembly and disassembly, which is beneficial to improving the operation efficiency.

[0015] In some embodiments, the first fastening portion and the second fastening portion are connected by any one of a first fastener and a first adapter sleeve. By setting it in this way, it is beneficial to improve the flexibility of use of the exhaust device.

[0016] In some embodiments, the exhaust device further includes a transition pipe body connected between the main pipe body and the connecting pipe body. The transition pipe body includes a fourth fastening portion and a fifth fastening portion that are spaced apart along its own extending direction. The fourth fastening portion is detachably connected to the first fastening portion, and the fifth fastening portion is detachably connected to the second fastening portion. By providing the transition pipe body, the length of the exhaust device can be further increased to prevent the exhaust device from interfering with other components, so that different parameters can be obtained for the battery cell in the same cycle test, which is beneficial to saving the test time and reducing the test cost.

[0017] In some embodiments, the number of transition pipe bodies is set to two or more, and the two or more transition pipe bodies are arranged in sequence along their own extending directions; among the two or more transition pipe bodies, the fourth fastening portion facing the main pipe body is detachably connected to the first fastening portion, the fourth fastening portion and the fifth fastening portion arranged oppositely are detachably connected to each other, and the fifth fastening portion facing the connecting pipe body is detachably connected to the second fastening portion. By setting in this way, the flexibility of use of the exhaust device is improved.

[0018] In some embodiments, the ratio of the length dimension d3 of the transition pipe body along its own extending direction to the length dimension d2 of the main pipe body along its own extending direction satisfies: 1 / 3 ≤ d3 / d2 ≤ 2 / 3. Such a design is beneficial to reducing the manufacturing cost of the exhaust device and improving the diversity of the exhaust device.

[0019] In some embodiments, one of the first fastening portion and the fourth fastening portion is sleeved on the outer periphery of the other; and / or, one of the second fastening portion and the fifth fastening portion is sleeved on the outer periphery of the other. By setting in this way, it is convenient for assembly and disassembly, which is beneficial to improving the operation efficiency.

[0020] In some embodiments, the first fastening portion and the fourth fastening portion are arranged in a threaded connection; and / or, the second fastening portion and the fifth fastening portion are arranged in a threaded connection. By setting in this way, it is convenient for assembly and disassembly, which is beneficial to improving the operation efficiency.

[0021] In some embodiments, the first fastening portion and the fourth fastening portion are connected by any one of a second fastener and a second adapter sleeve; and / or, the second fastening portion and the fifth fastening portion are connected by any one of a third fastener and a third adapter sleeve. By setting in this way, the flexibility of use of the exhaust device is improved.

[0022] In a second aspect, the present application provides a test device for detecting the gas production of a battery cell. The test device includes an exhaust device provided in any one of the embodiments of the first aspect; a test instrument connected to the third fastening portion of the connecting pipe body.

[0023] In some embodiments of the second aspect, the test device includes an exhaust device with a relatively long length and capable of flexibly changing its length, which facilitates the layout design of the test instrument and is conducive to improving the flexibility of use of the test device.

[0024] In a third aspect, the present application provides a combined test device for detecting the exhaust gas volume and expansion force of a battery cell. The combined test device includes: a first test device for detecting the gas production volume of the battery cell. The first test device includes an exhaust device and a test instrument provided in any one of the embodiments of the first aspect. The test instrument is connected to the third fastening portion of the connecting pipe body; a second test device for detecting the expansion force of the battery cell. The second test device includes a clamping tooling and a detection instrument. The clamping tooling clamps the battery cell and is electrically connected to the detection instrument; wherein, there is a gap between the clamping tooling and the exhaust device.

[0025] In some embodiments of the third aspect, by providing an exhaust device with a relatively long length and capable of flexibly changing its length, when the exhaust device and the clamping tooling are simultaneously installed on the battery cell, there will be no interference between the two, so that during one cycle of the battery cell, the gas production volume and expansion force of the battery cell can be simultaneously obtained through the first test device and the second test device, which is conducive to saving test time and reducing test costs.

[0026] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically gives the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0028] Figure 1 is a partial explosion schematic diagram of an exhaust device provided in some embodiments of the present application;

[0029] Figure 2 is a partial explosion schematic diagram of an exhaust device provided in some embodiments of the present application;

[0030] Figure 3 is a partial explosion schematic diagram of an exhaust device provided in some embodiments of the present application;

[0031] Figure 4 is a structural schematic diagram of a sealing pipe body in an exhaust device provided in some embodiments of the present application;

[0032] Figure 5 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0033] Figure 6 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0034] Figure 7 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0035] Figure 8 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0036] Figure 9 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0037] Figure 10 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0038] Figure 11 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0039] Figure 12 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0040] Figure 13 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application;

[0041] Figure 14 Partial explosion schematic diagram of an exhaust device provided for some other embodiments of the present application.

[0042] The reference numerals in the specific embodiments are as follows:

[0043] 10 - Main pipe body; 11 - Connecting portion; 12 - First fastening portion; 121 - Second external thread; 122 - First flange;

[0044] 20 - Connecting pipe body; 21 - Second fastening portion; 211 - Second flange; 22 - Third fastening portion; 221 - Protrusion; 222 - First external thread;

[0045] 30 - Elastic pipe body; 40 - Sealing pipe body; 41 - Sealing portion; 411 - Sealing component; 412 - Limiting component; 42 - Insertion pipe;

[0046] 50 - Adapter pipe body; 51 - Fourth fastening portion; 52 - Fifth fastening portion;

[0047] 61 - First adapter sleeve; 62 - Second adapter sleeve; 63 - Third adapter sleeve;

[0048] X - First direction; Detailed implementation manners

[0049] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0050] It should be noted that unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be the ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

[0051] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0052] In addition, technical terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two unless otherwise specifically defined.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0054] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] At present, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only applied to energy storage power systems such as hydraulic, thermal, wind and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in many fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand for them is also constantly increasing.

[0056] The development of battery technology needs to consider various design factors at the same time. For example, performance parameters such as battery life, energy density, discharge capacity, charge and discharge rate, etc. In addition, the reliability of the battery also needs to be considered.

[0057] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc.

[0058] The battery cell can be a secondary battery cell, and a secondary battery cell refers to a battery cell that can activate the active material and continue to be used by charging after discharging.

[0059] In the development process of the battery, it is necessary to conduct various tests on the battery. Among them, the cycle test, as the most basic performance test, is widely used in the evaluation of aspects such as battery life.

[0060] During the cycle of the battery cell, redox reactions will occur between the internal electrolyte and the positive and negative electrode materials to generate gas. If too much gas is generated, it will cause the internal pressure to be too high and affect the safety of the vehicle and the passengers inside. Therefore, usually during the cycle of the battery, the gas generation amount inside the battery is measured.

[0061] The gas generation amount test usually uses a gas production nail for gas conduction. One end of the gas production nail is welded to the liquid injection hole of the battery cell, and the other end is used to connect to the test instrument to measure the internal gas generation amount of the battery cell.

[0062] During the battery cycle, in order to save costs and improve efficiency, the expansion force of the battery cell can be detected while detecting the gas production of the battery cell. That is to say, in addition to the gas-producing nails connected to the battery cell, a clamping fixture can also be installed on the outside of the battery cell. The clamping fixture is connected to the sensor to measure the external expansion force of the battery.

[0063] However, when testing the gas production and expansion force of the battery cell at the same time, the gas production nails and the clamping tooling are prone to interference, and even the gas production nails and the clamping tooling cannot be installed on the battery cell at the same time, resulting in the inability to test the gas production and expansion force simultaneously. The thickness, strength and column distribution of the material used for the clamping tooling need to be precisely calculated, and the clamping tooling is usually specially made, with a long production cycle and high production costs.

[0064] Based on the above technical problems, the embodiment of the present application provides an exhaust device for guiding the gas in the battery cell to the test instrument, and the exhaust device includes a main pipe body and a connecting pipe body. The main pipe body includes a connecting portion and a first fastening portion spaced apart along its own extension direction, and the connecting portion is configured to be connected to the battery cell; the connecting pipe body is connected to the main pipe body, and the connecting pipe body includes a second fastening portion and a third fastening portion spaced apart along its own extension direction, and the second fastening portion is detachably connected to the first fastening portion, and the third fastening portion is configured to be connected to the test instrument.

[0065] An exhaust device provided by an embodiment of the present application has a main pipe body used to be connected to a battery cell. Connecting pipe bodies of different lengths that can be detachably connected to the main pipe body are provided to increase the overall length of the exhaust device. The exhaust device can be increased in length through conversion, which is easy to operate and helps to improve the flexible use of the exhaust device, thereby preventing it from interfering with a clamping tool in a detection device for testing the expansion force of a battery cell.

[0066] The exhaust device provided in the embodiment of the present application can be connected to a battery cell when measuring gas production, and can also be connected to a battery cell when simultaneously performing a gas production test and an expansion force test.

[0067] See also Figure 1 and Figure 2, an embodiment of the present application provides an exhaust device for guiding the gas in the battery cell to a test instrument. The exhaust device includes a main pipe body 10 and a connecting pipe body 20. The main pipe body 10 includes a connecting portion 11 and a first fastening portion 12 that are spaced apart along its own extending direction. The connecting portion 11 is configured to be connected to the battery cell. The connecting pipe body 20 communicates with the main pipe body 10. The connecting pipe body 20 includes a second fastening portion 21 and a third fastening portion 22 that are spaced apart along its own extending direction. The second fastening portion 21 is detachably connected to the first fastening portion 12, and the third fastening portion 22 is configured to be connected to the test instrument.

[0068] The exhaust device provided by the embodiment of the present application is used to guide the gas in the battery cell to a test instrument. Specifically, when performing a cycle test or other tests on the battery cell, an exhaust device can be connected to the battery cell to obtain the gas production amount of the battery cell in the test environment through the test instrument, which is convenient for subsequent performance analysis and design of the battery cell.

[0069] The test instrument can be a component capable of directly measuring the gas production amount, or a component capable of indirectly measuring the gas production amount, such as a pressure gauge or other air pressure detection devices.

[0070] The extending direction of the main pipe body 10 can extend along a straight line, that is, the main pipe body 10 can be set as a straight pipe; the extending direction of the main pipe body 10 can also extend along two or more intersecting straight lines, and the extending direction of the main pipe body 10 can also at least partially extend along an arc curve, that is, the main pipe body 10 can also be set as a bent pipe.

[0071] The extending direction of the connecting pipe body 20 can be the same as the extending direction of the main pipe body 10. Of course, it can also be set differently. However, for the sake of concise description, the following embodiments will all be described with the extending directions of the main pipe body 10 and the connecting pipe body 20 as the first direction X.

[0072] The connecting portion 11 of the main pipe body 10 is used to be connected to the battery cell. Among them, the connection method can include but is not limited to one of welding and adhesive connection. Specifically, the connecting portion 11 can be connected to the outer peripheral shell of the liquid injection hole of the battery cell, so that the gas inside the battery cell flows out from the liquid injection hole and enters the main pipe body 10.

[0073] The first fastening portion 12 of the main pipe body 10 is used to be detachably connected to the second fastening portion 21 of the connecting pipe body 20 to realize the communication setting of the main pipe body 10 and the connecting pipe body 20. Among them, the detachable connection method can include but is not limited to one of threaded connection, groove connection, flange connection, and ferrule connection.

[0074] Threaded connection refers to a connection method in which one pipe body is provided with an internal thread and the other pipe body is provided with an external thread, and the two pipe bodies are screwed to make the internal and external threads match each other; groove connection refers to a connection method in which a groove connector is sleeved on the relative positions of two pipe bodies; flange connection refers to a connection method in which flanges are provided at the relative pipe openings of the two pipe bodies, and the two flanges are fastened with fasteners such as bolts; ferrule connection refers to a connection method in which the relative parts of the two pipe bodies are inserted into the ferrule and locked with a ferrule nut to achieve the connection of the two pipe bodies.

[0075] Through the above arrangement, the first fastening part 12 and the second fastening part 21 can be detachably connected, thereby realizing the detachable arrangement of the main pipe body 10 and the connecting pipe body 20, which is also beneficial to ensure the sealing requirements after the two are connected and to improve the flexibility of use.

[0076] The third fastening portion 22 of the connecting tube body 20 is used to connect to a testing instrument, so that the gas inside the battery cell can enter the testing instrument through the main tube body 10 and the connecting tube body 20 for measurement.

[0077] An exhaust device provided by an embodiment of the present application includes a main pipe body 10 and a connecting pipe body 20 which are connected to each other. The main pipe body 10 is used to connect a battery cell, and the connecting pipe body 20 is used to connect a test instrument, so that the gas produced inside the battery cell during a cycle test can enter the test instrument through the main pipe body 10 and the connecting pipe body 20 in sequence, and the gas production inside the battery cell can be obtained through the test instrument. By providing a detachably connected main pipe body 10 and the connecting pipe body 20, the main pipe body 10 can be used in combination with connecting pipe bodies 20 of different lengths to increase the overall length of the exhaust device, so that the exhaust device can be increased in length by switching, which is easy to operate and helps to improve the flexible use of the exhaust device.

[0078] Furthermore, an exhaust device provided in an embodiment of the present application can increase its length by switching, so that while a battery cell is connected to the exhaust device for gas production detection, it can also be connected to other components for detection of other parameters. The exhaust device will not interfere with other components, so that the battery cell can obtain different parameters in the same cycle test, which is beneficial to saving test time, reducing test costs, and obtaining comprehensive cycle test data.

[0079] Furthermore, connecting pipe bodies 20 of different lengths and sizes can be provided for use with the main pipe body 10 to adapt to various test environments, thereby improving the flexible usability of the exhaust device.

[0080] In some embodiments, the length of the main pipe body 10 may be the same as that of the connecting pipe body 20; in other embodiments, the length of the main pipe body 10 may be less than that of the connecting pipe body 20; in still other embodiments, the length of the main pipe body 10 may be greater than that of the connecting pipe body 20.

[0081] Optionally, the connecting portion 11 may protrude from the outer peripheral surface of the main pipe body 10, that is, in the first direction X, the orthographic projection of the connecting portion 11 at least partially surrounds the orthographic projection of the main pipe body 10, so as to facilitate the positioning and assembly of the connecting portion 11 with the battery cell.

[0082] As Figure 1 shown, in some embodiments, the outer peripheral surface of the third fastening portion 22 is provided with protrusions 221 or grooves that are distributed at intervals along the extending direction of the main pipe body 10.

[0083] The protrusion 221 may be a structure protruding from the outer peripheral surface of the third fastening portion 22, and the groove may be a structure recessed along the outer peripheral surface of the third fastening portion 22. By setting in this way, the friction force of its connection with the test instrument can be increased, which is beneficial to improving the connection strength, and thus beneficial to improving the reliability of the exhaust device.

[0084] The number of the protrusions 221 and the grooves can both be set to two, three, or even more.

[0085] As Figure 2 shown, in some embodiments, the outer peripheral surface of the third fastening portion 22 is provided with a thread structure.

[0086] The thread structure refers to a structure with a spiral shape machined on the outer peripheral surface of the third fastening portion 22. By setting in this way, the friction force of its connection with the test instrument can be increased, which is beneficial to improving the connection strength, and thus beneficial to improving the reliability of the exhaust device.

[0087] Exemplarily, the third fastening portion 22 is a cylindrical structure, and the thread structure can be expressed as a cylindrical thread provided on the cylindrical structure.

[0088] The thread structure may include, but is not limited to, one of triangular threads, rectangular threads, trapezoidal threads, and serrated threads.

[0089] For the exhaust device provided in an embodiment of the present application, the outer peripheral surface of the third fastening portion 22 can be set to include a structure of protrusions 221 or grooves, and can also include a thread structure, which is beneficial to improving the use flexibility of the exhaust device.

[0090] Please refer to Figure 3, in some embodiments, the exhaust device further includes an elastic tube body 30 communicating with the connecting tube body 20. One side of the elastic tube body 30 along its extending direction is detachably connected to the first fastening portion 12, and the other side is configured to be connected to a test instrument.

[0091] The elastic tube body 30 can represent a tube body having a certain elasticity and capable of undergoing elastic deformation. For example, the elastic tube body 30 can include a silicone oil tube, a rubber tube, etc.

[0092] The connecting tube body 20 is connected to the test instrument through the elastic tube body 30. One side of the elastic tube body 30 along its extending direction is detachably connected to the third fastening portion 22, and the other side is connected to the test instrument. By providing the elastic tube body 30, it is convenient to connect the connecting tube body 20 to the test instrument.

[0093] Optionally, the elastic tube body 30 is sleeved on the outer periphery of the third fastening portion 22. By setting it in this way, the two can be closely attached to prevent air leakage problems, which is beneficial to improving the reliability of measurement data and thus beneficial to improving the reliability of the exhaust device.

[0094] In some examples, the elastic tube body 30 is sleeved on the outer periphery of the third fastening portion 22, and the outer peripheral surface of the third fastening portion 22 is provided with protrusions 221 or grooves spaced apart along the extending direction of the main tube body 10; in some other embodiments, the elastic tube body 30 is sleeved on the outer periphery of the third fastening portion 22, and the outer peripheral surface of the third fastening portion 22 is provided with a thread structure.

[0095] Please refer to Figure 4 and Figure 5 , in some embodiments, the exhaust device further includes a sealing tube body 40 communicating between the connecting tube body 20 and the elastic tube body 30. The sealing tube body 40 includes a sealing portion 41 and an insertion tube 42 connected along its extending direction. The sealing portion 41 is detachably connected to the third fastening portion 22, and the elastic tube body 30 is sleeved on the outer periphery of the insertion tube 42.

[0096] The extending direction of the sealing tube body 40 can extend along a straight line, that is, the sealing tube body 40 can be set as a straight tube; the extending direction of the sealing tube body 40 can also extend along two or more intersecting straight lines, and the extending direction of the sealing tube body 40 can also at least partially extend along an arc curve, that is, the sealing tube body 40 can also be set as a bent tube.

[0097] However, for the sake of brief description, the following embodiments will be described with the extending directions of the sealing tube body 40, the main tube body 10, and the connecting tube body 20 all being the first direction X.

[0098] The sealing portion 41 provided on one side of the sealed tube body 40 along the first direction X is in communication with the connecting tube body 20 and the main tube body 10. The insertion tube 42 on the other side of the sealed tube body 40 along the first direction X is connected to the elastic tube body 30. The sealed tube body 40, the connecting tube body 20, the main tube body 10, and the elastic tube body 30 are coaxially arranged.

[0099] One side of the elastic tube body 30 along the first direction X is sleeved on the outer periphery of the insertion tube 42, and the other side is connected to the test instrument. The outer peripheral surface of the insertion tube 42 is in close fit with the inner peripheral surface of the elastic tube body 30 to increase the connection area between the insertion tube 42 and the elastic tube body 30, prevent separation, facilitate improving the connection strength between the third fastening portion 22 and the elastic tube, and facilitate improving the reliability of the exhaust device.

[0100] In actual application, the elastic tube body 30 can be fixedly connected to the insertion tube 42, and the connecting tube body 20 with different lengths or structures can be replaced according to different requirements to be connected to the sealed tube body 40. That is to say, the elastic tube body 30 and the sealed tube body 40 can be continuously connected, which can prevent the problem of insufficient sealing caused by frequent disassembly and assembly of the two or the failure of the elastic tube body 30. By setting in this way, it is beneficial to improve the service life of the exhaust device. Optionally, the elastic tube body 30 is sleeved on the outer periphery of the insertion tube 42 and fixedly connected to it.

[0101] Between the sealing portion 41 of the sealed tube body 40 and the third fastening portion 22 of the connecting tube body 20, it can include but is not limited to one of threaded connection, groove connection, and ferrule connection.

[0102] In some embodiments, the sealing portion 41 is sleeved on the outer periphery of the third fastening portion 22.

[0103] The sealing portion 41 can be sleeved on the outer periphery of the third fastening portion 22 to achieve the sealed connection between the two, and the two can be connected by either snap connection or threaded connection. By setting in this way, it is convenient for installation and disassembly and beneficial to improve the operation efficiency.

[0104] Optionally, a convex portion can be provided on the outer peripheral surface of the third fastening portion 22, and a card slot matching the convex portion can be provided on the inner peripheral surface of the sealing portion 41. The convex portion and the card slot are snap-connected so that the sealing portion 41 can be sleeved on the outer periphery of the third fastening portion 22 for detachable connection with it.

[0105] Optionally, a threaded structure can be provided on the outer peripheral surface of the third fastening portion 22. For example, as Figure 2 That is Figure 5 As shown, a first external thread 222 is provided on the outer peripheral surface of the third fastening portion 22, and a first internal thread is provided on the inner peripheral surface of the sealing portion 41. The first external thread 222 and the first internal thread are correspondingly screwed together so that the sealing portion 41 can be sleeved on the outer periphery of the third fastening portion 22 for detachable connection with it.

[0106] Please continue to refer to Figure 4 and Figure 5 , in some embodiments, the sealing portion 41 includes a sealing member 411 and a limiting member 412. The sealing member 411 is detachably connected to the third fastening portion 22. The limiting member 412 is connected to one side of the sealing member 411 facing the insertion pipe 42 and sleeved on the outer periphery of the insertion pipe 42. The limiting member 412 protrudes from the outer peripheral surface of the sealing member 411 and the outer peripheral surface of the insertion pipe 42.

[0107] The sealing member 411 is used to be sleeved on the outer periphery of the third fastening portion 22 and is detachably connected to the third fastening portion 22. Among them, the two can be connected by any one of snap connection and threaded connection. By setting in this way, it is convenient for installation and disassembly, which is beneficial to improving the operation efficiency.

[0108] The limiting member 412 protrudes from the outer peripheral surface of the sealing member 411 and the outer peripheral surface of the insertion pipe 42. It can be understood that in the first direction X, the positive projection of the limiting member 412 at least partially surrounds the positive projections of the sealing member 411 and the insertion pipe 42, and can play a role in limiting and positioning the components connected to the sealing member 411 or the insertion pipe 42.

[0109] Optionally, the elastic tube body 30 is in abutting contact with the limiting member 412.

[0110] Optionally, the positive projection of the limiting member 412 in the first direction X is a polygonal structure, which is convenient for the operator to screw the sealing member 411 or the insertion pipe 42 through the limiting member 412, which is beneficial to improving the operation efficiency.

[0111] As Figure 2 shown, in some embodiments, the ratio of the length dimension d1 of the connecting pipe body 20 along its own extension direction to the length dimension d2 of the main pipe body 10 along its own extension direction satisfies: 1 / 3 ≤ d1 / d2 ≤ 2 / 3.

[0112] The length dimension d1 refers to the maximum length from one end to the other end of the connecting pipe body 20 along the first direction X; the length dimension d2 refers to the maximum length from one end to the other end of the main pipe body 10 along the first direction X.

[0113] By setting in this way, it can be avoided that the connecting pipe body 20 is set too long, so that after the main pipe body 10 is connected to the connecting pipe body 20, the adjustable range of the overall length of the exhaust device is reduced, thereby improving the diversity of the exhaust device and also being beneficial to reducing the manufacturing cost of the exhaust device.

[0114] As an example, the ratio of the length dimension d2 to the length dimension d1 can be but not limited to 1 / 3, 4 / 9, 1 / 2, 2 / 3, etc.

[0115] In some embodiments, one of the first fastening portion 12 and the second fastening portion 21 is sleeved on the outer periphery of the other.

[0116] The first fastening portion 12 and the second fastening portion 21 can be sleeved and connected by means of a threaded connection, and they can also be sleeved and connected by means of a snap connection. Moreover, a sealing ring or a gasket can be provided between the first fastening portion 12 and the second fastening portion 21 to improve the sealing performance.

[0117] For the exhaust device provided by an embodiment of the present application, the first fastening portion 12 and the second fastening portion 21 can be detachably connected by means of a sleeved connection, which is convenient for installation and disassembly and is beneficial to improving the operation efficiency.

[0118] In some embodiments, the first fastening portion 12 and the second fastening portion 21 are provided with a threaded connection.

[0119] As Figure 1 and Figure 2 shown, a second external thread 121 can be provided on the outer peripheral surface of the first fastening portion 12, and a second internal thread can be provided on the inner peripheral surface of the second fastening portion 21, and the second external thread 121 and the second internal thread are correspondingly screwed and connected.

[0120] As Figure 6 and Figure 7 shown, a second internal thread can be provided on the inner peripheral surface of the first fastening portion 12, and a second external thread 121 can be provided on the outer peripheral surface of the second fastening portion 21, and the second internal thread and the second external thread 121 are correspondingly screwed and connected.

[0121] For the exhaust device provided by an embodiment of the present application, by setting the main pipe body 10 and the connecting pipe body 20 in a threaded connection manner, it is convenient for assembly and disassembly, beneficial to improving the operation efficiency, and beneficial to improving the sealing performance between the two, thereby beneficial to improving the reliability of the exhaust device.

[0122] As Figure 2 shown, a second external thread 121 is provided on the outer peripheral surface of the first fastening portion 12, a second internal thread is provided on the inner peripheral surface of the second fastening portion 21, and the first external thread 222 and the second external thread 121 have the same thread structure, that is, the first external thread 222 can also be screwed and connected with the second internal thread.

[0123] That is to say, when a threaded structure is provided on the outer peripheral surface of the third fastening portion 22, and the first fastening portion 12 and the second fastening portion 21 are arranged in a threaded connection, the number of connecting pipe bodies 20 can be set to two or more. Two or more connecting pipe bodies 20 are arranged in sequence along the first direction X. The outermost connecting pipe body 20 facing the main pipe body 10 is threadedly connected to the first fastening portion 12 of the main pipe body 10 through the second fastening portion 21. Adjacent connecting pipe bodies 20 are arranged in a threaded connection. The outermost connecting pipe body 20 facing away from the main pipe body 10 is connected to the testing instrument through the third fastening portion 22.

[0124] By setting in the above manner, the corresponding number of connecting pipe bodies 20 can be selected according to requirements, which is beneficial to improving the flexibility of use and facilitating assembly.

[0125] Please refer to Figure 8 and Figure 9 , in some embodiments, the first fastening portion 12 and the second fastening portion 21 are connected by any one of the first fastener and the first adapter sleeve 61.

[0126] As Figure 8 shown, the first fastening portion 12 includes a first flange 122 protruding from the outer peripheral surface of the main pipe body 10, and the second fastening portion 21 includes a second flange 211 protruding from the outer peripheral surface of the connecting pipe body 20. The first flange 122 and the second flange 211 are arranged opposite to each other and are connected by a first fastener.

[0127] To improve the sealing performance after the connection between the first flange 122 and the second flange 211, a sealing ring or a gasket can also be provided between the two to prevent gas leakage, which is beneficial to improving the sealing performance between the main pipe body 10 and the connecting pipe body 20, and thus beneficial to improving the reliability of the exhaust device.

[0128] Optionally, the first fastener may include at least one of a screw, a stud, a rivet, and a bolt.

[0129] As Figure 9 shown, the first fastening portion 12 and the second fastening portion 21 are arranged opposite to each other. A part of the first adapter sleeve 61 can be sleeved on the outer periphery of the first fastening portion 12, and another part can be sleeved on the outer periphery of the second fastening portion 21 to connect the first fastening portion 12 and the second fastening portion 21.

[0130] Optionally, a nut or a clamp can be screwed on the outer peripheral surface of the first adapter sleeve 61 to further improve the connection strength between the first adapter sleeve 61 and the first fastening portion 12 and the second fastening portion 21, thereby being beneficial to improving the connection sealing performance and the reliability of the exhaust device.

[0131] An exhaust device provided by an embodiment of the present application can be detachably connected between the main body 10 and the connecting pipe body 20 by setting a first fastener or a first adapter sleeve 61, which is beneficial to improving the use flexibility, facilitating assembly and disassembly, improving the operation efficiency, and improving the sealing performance between the two.

[0132] Please refer to Figure 10 , in some embodiments, the exhaust device further includes a transition pipe body 50 connected between the main body 10 and the connecting pipe body 20. The transition pipe body 50 includes a fourth fastening portion 51 and a fifth fastening portion 52 that are spaced apart along its own extending direction. The fourth fastening portion 51 is detachably connected to the first fastening portion 12, and the fifth fastening portion 52 is detachably connected to the second fastening portion 21.

[0133] The extending direction of the transition pipe body 50 can extend along a straight line, that is, the transition pipe body 50 can be set as a straight pipe; the extending direction of the transition pipe body 50 can also extend along two or more intersecting straight lines, and the extending direction of the transition pipe body 50 can also at least partially extend along an arc curve, that is, the transition pipe body 50 can also be set as a bent pipe.

[0134] However, for the sake of simplicity in description, the following embodiments will be described with the extending directions of the main body 10, the connecting pipe body 20, the sealing pipe body 40, and the transition pipe body 50 all being the first direction X.

[0135] The transition pipe body 50 is connected between the main body 10 and the connecting pipe body 20, and the main body 10, the transition pipe body 50, the connecting pipe body 20, the sealing pipe body 40, and the elastic pipe body 30 are coaxially arranged.

[0136] The fourth fastening portion 51 of the transition pipe body 50 is used for detachably connecting with the first fastening portion 12 of the main body 10 to realize the communication setting between the main body 10 and the transition pipe body 50; the fifth fastening portion 52 of the transition pipe body 50 is used for detachably connecting with the second fastening portion 21 of the connecting pipe body 20 to realize the communication setting between the connecting pipe body 20 and the transition pipe body 50. Among them, the detachable connection method can include but is not limited to one of threaded connection, groove connection, flange connection, and ferrule connection.

[0137] The exhaust device provided by an embodiment of the present application further increases the length of the exhaust device by setting a transition pipe body 50 detachably connected between the main body 10 and the connecting pipe body 20, preventing interference between the exhaust device and other components, and being beneficial to improving the use flexibility.

[0138] Optionally, the number of the transition pipe bodies 50 can be set to one, two, or more, and the specific number of the transition pipe bodies 50 can be designed according to requirements.

[0139] Since the first fastening portion 12 and the second fastening portion 21 are detachably connected to achieve the detachable connection between the main pipe body 10 and the connecting pipe body 20, the fourth fastening portion 51 and the second fastening portion 21 can be set to have the same structure, and the fifth fastening portion 52 and the first fastening portion 12 can be set to have the same structure. In this structure, any number of adapter pipe bodies 50 can be added between the main pipe body 10 and the connecting pipe body 20, and detachable connection can be achieved, which is beneficial to improving the flexibility and diversity of the exhaust device.

[0140] Please refer to Figure 11 , in some embodiments, the number of the adapter pipe bodies 50 is set to two or more, and the two or more adapter pipe bodies 50 are arranged in sequence along their own extension directions. Among the two or more adapter pipe bodies 50, the fourth fastening portion 51 facing the main pipe body 10 is detachably connected to the first fastening portion 12, the fourth fastening portion 51 and the fifth fastening portion 52 which are oppositely arranged are detachably connected to each other, and the fifth fastening portion 52 facing the connecting pipe body 20 is detachably connected to the second fastening portion 21.

[0141] It can be understood that two adjacent adapter pipe bodies 50 are detachably connected, and among the two or more adapter pipe bodies 50 located on the outermost sides along the first direction X, one of them is detachably connected to the main pipe body 10, and the other is detachably connected to the connecting pipe body 20. By setting in this way, it is beneficial to improve the flexibility of the exhaust device.

[0142] Optionally, the structures of each adapter pipe body 50 can be set to be the same. Of course, they can also be set to be different.

[0143] Please refer to Figure 2 and Figure 10 , in some embodiments, the ratio of the length dimension d3 of the adapter pipe body 50 along its own extension direction to the length dimension d2 of the main pipe body 10 along its own extension direction satisfies: 1 / 3 ≤ d3 / d2 ≤ 2 / 3.

[0144] The length dimension d3 refers to the maximum length from one end to the other end of the adapter pipe body 50 along the first direction X.

[0145] By setting in this way, it can be avoided that the adapter pipe body 50 is set too long, so that after the main pipe body 10, the connecting pipe body 20 and the adapter pipe body 50 are connected, the adjustable range of the overall length of the exhaust device is reduced, thereby improving the diversity of the exhaust device and also being beneficial to reducing the manufacturing cost of the exhaust device.

[0146] As an example, the ratio of the length dimension d3 to the length dimension d1 can be but not limited to 1 / 3, 4 / 9, 1 / 2, 2 / 3, etc.

[0147] Optionally, the length dimension d3 of the adapter pipe body 50 and the length dimension d1 of the connecting pipe body 20 can be set to be the same. Of course, they can also be set to be different.

[0148] In some embodiments, one of the first fastening portion 12 and the fourth fastening portion 51 is sleeved on the outer periphery of the other.

[0149] The first fastening portion 12 and the fourth fastening portion 51 can be sleeved and connected by means of threaded connection. They can also be sleeved and connected by means of snap connection. Moreover, a sealing ring or a gasket can be provided between the first fastening portion 12 and the fourth fastening portion 51 to improve the sealing performance.

[0150] In some embodiments, one of the second fastening portion 21 and the fifth fastening portion 52 is sleeved on the outer periphery of the other. By setting in this way, it is convenient for assembly and positioning.

[0151] The second fastening portion 21 and the fifth fastening portion 52 can be sleeved and connected by means of threaded connection. They can also be sleeved and connected by means of snap connection. Moreover, a sealing ring or a gasket can be provided between the second fastening portion 21 and the fifth fastening portion 52 to improve the sealing performance.

[0152] In the exhaust device provided by an embodiment of the present application, the first fastening portion 12 and the fourth fastening portion 51, and the second fastening portion 21 and the fifth fastening portion 52 can be detachably connected by means of sleeved connection, which is convenient for installation and disassembly and is beneficial to improving the operation efficiency.

[0153] As Figure 10 shown, in some embodiments, the first fastening portion 12 and the fourth fastening portion 51 are connected by threaded connection.

[0154] Since the first fastening portion 12 and the second fastening portion 21 can be connected by threaded connection, therefore, the adapter pipe body 50 added between the main pipe body 10 and the connecting pipe body 20 needs to have similar structural features to them, so that when there is a need to add the adapter pipe body 50, the adapter pipe body 50 can be detachably connected between the main pipe body 10 and the connecting pipe body 20.

[0155] Please refer to Figure 2 and Figure 10 , the outer peripheral surface of the first fastening portion 12 is provided with a second external thread 121, and the inner peripheral surface of the second fastening portion 21 is provided with a second internal thread. That is to say, the inner peripheral surface of the fourth fastening portion 51 can be provided with a second internal thread, and the second external thread 121 and the second internal thread are correspondingly screwed together to realize the threaded connection setting of the first fastening portion 12 and the fourth fastening portion 51.

[0156] Of course, please refer to Figure 7 and Figure 12, when the inner peripheral surface of the first fastening portion 12 is provided with a second internal thread and the outer peripheral surface of the second fastening portion 21 is provided with a second external thread 121, the outer peripheral surface of the fourth fastening portion 51 may be provided with the second external thread 121, and the second external thread 121 is screwed and connected to the second internal thread correspondingly to achieve the threaded connection arrangement between the first fastening portion 12 and the fourth fastening portion 51.

[0157] In some embodiments, the second fastening portion 21 and the fifth fastening portion 52 are arranged in a threaded connection.

[0158] Since the first fastening portion 12 and the second fastening portion 21 can be arranged in a threaded connection, therefore, the adapter pipe body 50 added between the main pipe body 10 and the connecting pipe body 20 needs to have similar characteristics to both of them, so that when there is a need to add the adapter pipe body 50, the adapter pipe body 50 can be detachably connected between the main pipe body 10 and the connecting pipe body 20.

[0159] Please refer to Figure 2 and Figure 10 , the outer peripheral surface of the first fastening portion 12 is provided with a second external thread 121, and the inner peripheral surface of the second fastening portion 21 is provided with a second internal thread. That is to say, the outer peripheral surface of the fifth fastening portion 52 may be provided with the second external thread 121, and the second external thread 121 is screwed and connected to the second internal thread correspondingly to achieve the threaded connection arrangement between the second fastening portion 21 and the fifth fastening portion 52.

[0160] Of course, please refer to Figure 7 and Figure 12 , when the inner peripheral surface of the first fastening portion 12 is provided with a second internal thread and the outer peripheral surface of the second fastening portion 21 is provided with a second external thread 121, the inner peripheral surface of the fifth fastening portion 52 may be provided with a second internal thread, and the second external thread 121 is screwed and connected to the second internal thread correspondingly to achieve the threaded connection arrangement between the second fastening portion 21 and the fifth fastening portion 52.

[0161] For the exhaust device provided by an embodiment of the present application, by arranging the connection between the main pipe body 10 and the adapter pipe body 50 and between the connecting pipe body 20 and the adapter pipe body 50 in a threaded connection manner, it is convenient for assembly and disassembly, which is beneficial to improving the operation efficiency, and is beneficial to improving the sealing performance between the two, thereby being beneficial to improving the reliability of the exhaust device.

[0162] Please refer to Figure 13 and Figure 14 , in some embodiments, the first fastening portion 12 and the fourth fastening portion 51 are connected by any one of the second fastener and the second adapter sleeve 62.

[0163] Such as Figure 13As shown, since the first fastening portion 12 and the second fastening portion 21 can be connected by a first fastener, therefore, the adapter pipe body 50 added between the main pipe body 10 and the connecting pipe body 20 needs to have similar characteristics to them, so that when there is a need to add the adapter pipe body 50, the adapter pipe body 50 can be detachably connected between the main pipe body 10 and the connecting pipe body 20.

[0164] The fourth fastening portion 51 includes a third flange 511 protruding from the adapter pipe body 50. The first flange 122 and the third flange 511 are disposed opposite to each other and connected by a second fastener. Among them, the structures of the third flange 511 and the second flange 211 can be the same or different.

[0165] To improve the sealing performance after the connection between the first flange 122 and the third flange 511, a sealing ring or a gasket can also be provided between them to facilitate preventing gas leakage, thereby facilitating improving the sealing performance between the main pipe body 10 and the connecting pipe body 20, and further facilitating improving the reliability of the exhaust device.

[0166] Optionally, the second fastener may include but is not limited to at least one of a screw, a stud, a rivet, and a bolt.

[0167] As Figure 14 shown, the first fastening portion 12 and the fourth fastening portion 51 are disposed opposite to each other. A part of the second adapter sleeve 62 can be sleeved on the outer periphery of the first fastening portion 12, and another part can be sleeved on the outer periphery of the fourth fastening portion 51 to connect the first fastening portion 12 and the fourth fastening portion 51.

[0168] Optionally, a nut or a clamp can also be screwed on the outer peripheral surface of the second adapter sleeve 62 to further improve the connection strength between the second adapter sleeve 62 and the first fastening portion 12 and the fourth fastening portion 51, thereby facilitating improving the connection sealing performance.

[0169] The exhaust device provided by an embodiment of the present application can set a second fastener or a second adapter sleeve 62 between the main pipe body 10 and the adapter pipe body 50 to achieve their detachable connection, which is beneficial to improving the use flexibility, facilitating assembly and disassembly, beneficial to improving the operation efficiency, and beneficial to improving the sealing performance between them.

[0170] In some embodiments, the second fastening portion 21 and the fifth fastening portion 52 are connected by any one of a third fastener and a third adapter sleeve 63.

[0171] As Figure 13As shown, the fifth fastening part 52 includes a fourth flange 521 protruding from the adapter pipe body 50. The fourth flange 521 is disposed opposite to the second flange 211 and is connected by a third fastener. Among them, the structures of the fourth flange 521 and the first flange 122 can be the same or different.

[0172] To improve the sealing performance after the connection between the fourth flange 521 and the second flange 211, a sealing ring or gasket can also be provided between them to prevent gas leakage, thereby facilitating the improvement of the sealing performance between the main pipe body 10 and the connecting pipe body 20, and further facilitating the improvement of the reliability of the exhaust device.

[0173] Optionally, the third fastener may include but is not limited to at least one of screws, studs, rivets, and bolts.

[0174] As Figure 14 shown, the second fastening part 21 and the fifth fastening part 52 are disposed opposite to each other. A part of the third adapter sleeve 63 can be sleeved on the outer periphery of the second fastening part 21, and another part can be sleeved on the outer periphery of the fifth fastening part 52 to connect the second fastening part 21 and the fifth fastening part 52.

[0175] Optionally, a nut or clamp can also be screwed on the outer peripheral surface of the third adapter sleeve 63 to further improve the connection strength between the third adapter sleeve 63 and the second fastening part 21 and the fifth fastening part 52, thereby facilitating the improvement of the connection sealing performance.

[0176] The exhaust device provided by an embodiment of the present application can set a third fastener or a third adapter sleeve 63 between the adapter pipe body 50 and the connecting pipe body 20 to achieve their detachable connection, which is beneficial to improving the use flexibility, facilitating assembly and disassembly, beneficial to improving the operation efficiency, and beneficial to improving the sealing performance between them.

[0177] When the number of adapter pipe bodies 50 is set to two or more, one of the fourth fastening part 51 and the fifth fastening part 52 disposed opposite to each other along the first direction X can be sleeved on the outer periphery of the other to achieve detachable connection. The fourth fastening part 51 and the fifth fastening part 52 disposed opposite to each other along the first direction X can also be threadedly connected, or the fourth fastening part 51 and the fifth fastening part 52 disposed opposite to each other along the first direction X can also be connected by any one of a fourth fastener and a fourth adapter sleeve. The specific structural settings are as described above, and the present application will not elaborate here.

[0178] The embodiment of the present application also provides a testing device for detecting the gas production of battery cells. The testing device includes the exhaust device provided by the above embodiments and a testing instrument. The testing instrument is connected to the third fastening part 22 of the connecting pipe body 20.

[0179] A test device provided in an embodiment of the present application is provided with an exhaust device with a relatively long length and the length of which can be flexibly changed, so that the layout design of the test instrument is facilitated and the flexibility of use of the test device is improved.

[0180] The embodiment of the present application also provides a combined testing device for detecting the gas production and expansion force of a battery cell, and the combined testing device includes a first testing device and a second testing device. The first testing device is used to detect the gas production of the battery cell, and the first testing device includes an exhaust device and a testing instrument as provided in the above embodiments, and the testing instrument is connected to the third fastening portion 22 of the connecting tube body 20. The second testing device is used to detect the expansion force of the battery cell, and the second testing device includes a clamping tool and a testing instrument, the clamping tool is clamped on the battery cell and is electrically connected to the testing instrument; wherein, there is a gap between the clamping tool and the exhaust device.

[0181] The gap between the clamping fixture and the exhaust device means that there will be no interference problem after the two are connected to the battery cells respectively.

[0182] The clamping tool may include two clamping surfaces arranged opposite to each other, a clamping space is formed between the two clamping surfaces, and the battery cell can be accommodated in the clamping space.

[0183] The detection instrument may include, but is not limited to, one of a sensor and a resistance detection device.

[0184] A combined testing device provided in one embodiment of the present application is provided with an exhaust device which is relatively long and can flexibly change its length, so that when the exhaust device and the clamping tool are installed on the battery cell at the same time, there will be no interference between the two. In this way, during one cycle of the battery cell, the gas production and expansion force of the battery cell can be measured by the first testing device and the second testing device at the same time, which is beneficial to saving testing time, reducing testing costs, and being able to obtain comprehensive cycle test data.

[0185] See also Figure 2 , Figure 4 , Figure 5 , Figure 10 and Figure 11 An embodiment of the present application provides an exhaust device for guiding the gas in a battery cell to a testing instrument. The exhaust device includes a main tube 10, a connecting tube 20, an elastic tube 30, a sealing tube 40 and a transfer tube 50.

[0186] The main body 10 includes connecting portions 11 and first fastening portions 12 which are spaced apart along its extending direction. The connecting portions 11 are configured to be connected to the battery cells.

[0187] The adapter body 50 is connected between the main body 10 and the connecting pipe body 20, and includes a fourth fastening portion 51 and a fifth fastening portion 52 that are spaced apart along its own extending direction. The first fastening portion 12 is threadedly connected to the fourth fastening portion 51, and the second fastening portion 21 is threadedly connected to the fifth fastening portion 52.

[0188] The connecting pipe body 20 includes a second fastening portion 21 and a third fastening portion 22 that are spaced apart along its own extending direction. A threaded structure is provided on the outer peripheral surface of the third fastening portion 22.

[0189] The sealing pipe body 40 is connected between the connecting pipe body 20 and the elastic pipe body 30, and includes a sealing portion 41 and an insertion pipe 42 that are connected along its own extending direction. The sealing portion 41 includes a sealing member 411 and a limiting member 412. The sealing member 411 is threadedly connected to the third fastening portion 22. The limiting member 412 is connected to the side of the sealing member 411 facing the insertion pipe 42 and is sleeved on the outer periphery of the insertion pipe 42. The limiting member 412 protrudes from the outer peripheral surface of the sealing member 411 and the outer peripheral surface of the insertion pipe 42.

[0190] One side of the elastic pipe body 30 along its own extending direction is sleeved on the outer periphery of the insertion pipe 42, and the other side is configured to be connected to a test instrument.

[0191] The ratio of the length dimension d1 of the connecting pipe body 20 along its own extending direction to the length dimension d2 of the main body 10 along its own extending direction satisfies: 1 / 3 ≤ d1 / d2 ≤ 2 / 3; the ratio of the length dimension d3 of the adapter body 50 along its own extending direction to the length dimension d2 of the main body 10 along its own extending direction satisfies: 1 / 3 ≤ d3 / d2 ≤ 2 / 3.

[0192] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An exhaust device for guiding the gas in a battery cell to a test instrument, characterized in that, The exhaust device includes: A main body, including connecting parts and a first fastening part that are spaced apart along the extending direction of the main body itself. The connecting parts are configured to be connected to the battery cells. A connecting pipe body, which communicates with the main body. The connecting pipe body includes a second fastening part and a third fastening part that are spaced apart along the extending direction of the connecting pipe body itself. The second fastening part is detachably connected to the first fastening part, and the third fastening part is configured to be connected to the test instrument.

2. The exhaust device according to claim 1, characterized in that, On the outer peripheral surface of the third fastening part, there are protrusions or grooves that are spaced apart along the extending direction of the main body; alternatively, a threaded structure is provided on the outer peripheral surface of the third fastening part.

3. The exhaust device according to claim 1 or 2, characterized in that The exhaust device further includes an elastic pipe body that communicates with the connecting pipe body. One side of the elastic pipe body along its extending direction is detachably connected to the first fastening part, and the other side is configured to be connected to the test instrument.

4. The exhaust device according to claim 3, characterized in that, The exhaust device further includes a sealing pipe body that communicates between the connecting pipe body and the elastic pipe body. The sealing pipe body includes a sealing part and an insertion pipe that are connected along the extending direction of the sealing pipe body itself. The sealing part is detachably connected to the third fastening part, and the elastic pipe body is sleeved on the outer periphery of the insertion pipe.

5. The exhaust device according to claim 4, characterized in that, The sealing part is sleeved on the outer periphery of the third fastening part.

6. The exhaust device according to claim 4 or 5, characterized in that, The sealing part includes a sealing component and a limiting component. The sealing component is detachably connected to the third fastening part. The limiting component is connected to the side of the sealing component facing the insertion pipe and is sleeved on the outer periphery of the insertion pipe. The limiting component protrudes from the outer peripheral surface of the sealing component and the outer peripheral surface of the insertion pipe.

7. The exhaust device according to any one of claims 1 to 6, characterized in that, The ratio of the length dimension d1 of the connecting pipe body along its extending direction to the length dimension d2 of the main body along its extending direction satisfies: 1 / 3 ≤ d1 / d2 ≤ 2 / 3.

8. The exhaust device according to any one of claims 1 to 7, characterized in that, One of the first fastening part and the second fastening part is sleeved on the outer periphery of the other.

9. The exhaust device according to claim 8, wherein The first fastening part and the second fastening part are provided with a threaded connection.

10. The exhaust device according to any one of claims 1 to 7, characterized in that, The first fastening part and the second fastening part are connected by any one of a first fastener and a first adapter sleeve.

11. The exhaust device according to any one of claims 1 to 7, characterized in that, The exhaust device further includes a transition pipe body that communicates between the main body and the connecting pipe body. The transition pipe body includes a fourth fastening part and a fifth fastening part that are spaced apart along the extending direction of the transition pipe body itself. The fourth fastening part is detachably connected to the first fastening part, and the fifth fastening part is detachably connected to the second fastening part.

12. The exhaust device according to claim 11, characterized in that, The number of the transition pipe bodies is set to two or more, and two or more of the transition pipe bodies are arranged in sequence along their extending directions; Among two or more of the transition pipe bodies, the fourth fastening part facing the main body is detachably connected to the first fastening part, the fourth fastening part and the fifth fastening part that are oppositely arranged are detachably connected to each other, and the fifth fastening part facing the connecting pipe body is detachably connected to the second fastening part.

13. The exhaust device according to claim 11 or 12, characterized in that, The ratio of the length dimension d3 of the transition pipe body along its extending direction to the length dimension d2 of the main body along its extending direction satisfies: 1 / 3 ≤ d3 / d2 ≤ 2 / 3.

14. The exhaust device according to any one of claims 11 to 13, characterized in that, One of the first fastening part and the fourth fastening part is sleeved on the outer periphery of the other; and / or, one of the second fastening part and the fifth fastening part is sleeved on the outer periphery of the other.

15. The exhaust device according to claim 14, wherein The first fastening part and the fourth fastening part are arranged in a threaded connection; and / or, the second fastening part and the fifth fastening part are arranged in a threaded connection.

16. The exhaust device according to any one of claims 11 to 13, characterized in that, The first fastening part and the fourth fastening part are connected by any one of a second fastener and a second adapter sleeve; and / or, the second fastening part and the fifth fastening part are connected by any one of a third fastener and a third adapter sleeve.

17. A testing device for detecting the gas production of a single battery cell, characterized in that, The test device includes: The exhaust device according to any one of claims 1 to 16; A test instrument, which is connected to the third fastening part of the connecting pipe body.

18. A combined test device for detecting the exhaust volume and expansion force of a single battery cell, characterized in that, The combined test device includes: A first test device for detecting the gas production amount of the battery cell, the first test device includes the exhaust device according to any one of claims 1 to 16 and a test instrument, and the test instrument is connected to the third fastening part of the connecting pipe body; A second test device for detecting the expansion force of the battery cell, the second test device includes a clamping tooling and a detection instrument, the clamping tooling clamps the battery cell and is electrically connected to the detection instrument; Wherein, there is a gap between the clamping tooling and the exhaust device.

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