Sensor connection device and flow battery

Abstract

The application relates to the technical field of energy storage, in particular to a sensor connecting device and a flow battery. The connecting device comprises a base, an installation cavity is arranged through the base along a first direction, and two ends of the installation cavity form a first opening and a second opening; a sensor comprises a connecting part and a sensing part connected with each other, the connecting part is sleeved with the base to block the first opening, the sensing part is installed in the installation cavity and passes out through the second opening; a locking part with elasticity is arranged outside the base and the connecting part to lock the base and the connecting part; an elastic part is arranged between the base and the connecting part along the first direction, the elastic part provides abutting force for closely abutting the base and the connecting part with the abutting part of the locking part along the first direction, and the locking part abuts against the base and the connecting part to limit displacement of the base and the connecting part along the first direction. The application can firmly fix the sensor on the base to overcome the influence of vibration, not only ensures the sealing property and reduces electrolyte leakage, but also reduces the occurrence of problems such as sensor measurement distortion.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to a sensor connection device and a flow battery. Background Technology

[0002] Flow batteries are an electrochemical energy storage technology. Their core feature is the mutual conversion of electrical energy and chemical energy through the "cyclic reaction of liquid electrolyte". They have advantages such as high safety, long life and adaptability to long-term energy storage, and have become one of the key technologies to support large-scale energy consumption and build new power systems.

[0003] In flow batteries, sensors (pressure and temperature sensors) need to be mounted on the pipeline to continuously monitor key parameters of the electrolyte (such as pressure and temperature). Typically, the sensors are connected to a base mounted on the pipeline via threaded connections. However, during operation, pump start-up and shutdown, fluid impact, and external environmental factors cause continuous vibration in the pipeline. Under this alternating load, slight relative slippage occurs between the threaded pairs, causing the thread tightening preload to gradually decrease and leading to thread loosening. Once the threads loosen, it can cause sensor measurement distortion or, in severe cases, electrolyte leakage, polluting the environment, increasing maintenance costs, and affecting the performance and lifespan of the entire battery system due to electrolyte imbalance. Utility Model Content

[0004] Therefore, it is necessary to provide a sensor connection device and flow battery that can overcome the influence of vibration and prevent the sensor from becoming loose, addressing the problem that traditional threaded connections are prone to sensor loosening.

[0005] A sensor connection device, comprising:

[0006] The base has a mounting cavity extending through it along a first direction, and the two ends of the mounting cavity form a first opening and a second opening, respectively.

[0007] The sensor includes a connecting part and a sensing part that are connected to each other. The connecting part is sleeved with the base to block the first opening. The sensing part is installed in the mounting cavity and partially protrudes through the second opening.

[0008] A resilient locking element, a detachable clamp, is provided outside the base and the connecting part to lock the base and the connecting part;

[0009] An elastic member is compressed and abutted between the base and the connecting portion along the first direction to provide abutting force that causes the base and the connecting portion to abut tightly against the abutting portion of the locking member along the first direction. The locking member abuts against the base and the connecting portion to restrict their displacement along the first direction.

[0010] In one embodiment, one of the base and the connecting portion is sleeved on the outside as an outer sleeve portion and the other as an inner sleeve portion. The outer sleeve portion has a stepped portion inside, and the elastic member is located inside the outer sleeve portion and abuts against the end face of the stepped portion and the inner sleeve portion along the first direction.

[0011] In one embodiment, the elastic member is provided with a through hole, and the sensing part passes through the through hole and extends out through the second opening.

[0012] In one embodiment, the elastic element is a spring.

[0013] In one embodiment, the base serves as the outer sleeve and the connecting portion serves as the inner sleeve.

[0014] In one embodiment, at least one of the connecting portion and the base is provided with a mounting groove, and the sensor connecting device further includes a sealing ring, which is installed in the mounting groove to seal the connecting portion and the base.

[0015] In one embodiment, one of the base and the locking member is provided with a first protrusion, and the other is provided with a first receiving portion. The first protrusion is contained within the first receiving portion. The inner wall of the first protrusion or the first receiving portion provided on the locking member forms an abutting portion that abuts against the base. The first protrusion and the inner wall of the first receiving portion abut tightly under the action of the abutting force.

[0016] and / or

[0017] One of the connecting part and the locking member is provided with a second protrusion, and the other is provided with a second receiving part. The second protrusion is located in the second receiving part. The inner wall of the second protrusion or the second receiving part on the locking member forms an abutting part that abuts against the connecting part. The second protrusion and the inner wall of the second receiving part abut tightly under the action of the abutting force.

[0018] In one embodiment, the locking member includes a body and a first stop. The body is annular and has a first end and a second end formed at its two ends, respectively. The first stop is connected to the end of the first end and is folded outward. The first end is provided with an adjustment hole.

[0019] The locking member further includes a second stop, which is connected to the end of the second end and folds outward;

[0020] The second stop extends out of the adjustment hole and is adjustable in position relative to the adjustment hole in the circumferential direction.

[0021] A flow battery includes a pipe and the aforementioned sensor connection device, wherein the base of the sensor connection device is fixedly connected to the pipe.

[0022] The mounting cavity is connected to the inner cavity of the pipe, and the sensing unit can extend into the inner cavity of the pipe through the second opening.

[0023] In one embodiment, the pipe is provided with a mounting hole, and the base passes through the mounting hole and is welded and fixed to the pipe, or the base is fixedly connected to the pipe by a threaded component.

[0024] The aforementioned sensor connection device and flow battery, with the sensor and base nested together and locked by a locking member clamped to the outside, secure the base and connection in a direction intersecting the first direction. Furthermore, since the elastic member compresses and abuts against the base and connection in the first direction, it provides a contact force that ensures both the base and connection abut against the locking member's contact portion along the first direction. This contact force ensures a tight fit between the base and connection and the locking member, preventing relative movement and displacement along the first direction. Thus, compared to the threaded fixing method in existing technologies, this locking method using both the locking member and elastic member prevents vibration from causing the sensor and base to loosen. The contact force provided by the elastic member, under vibration, further tightens the contact between the base and connection and the locking member, firmly fixing the sensor to the base. This not only ensures airtightness and reduces electrolyte leakage but also reduces sensor measurement distortion. Attached Figure Description

[0025] Figure 1 A structural diagram of a sensor connection device provided in an embodiment of this application when it is installed in an mounting structure;

[0026] Figure 2 for Figure 1 A structural diagram of the structure shown from another perspective;

[0027] Figure 3 This is a structural diagram of a sensor connection device provided in an embodiment of this application;

[0028] Figure 4 for Figure 3 An exploded view of the sensor connection device shown;

[0029] Figure 5 for Figure 3 A cross-sectional view of the sensor connection device shown;

[0030] Figure 6 for Figure 3 The diagram shows the structure of the locking component of the sensor connection device.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Sensor connection device;

[0033] 10. Base; 11. Mounting cavity; 111. First opening; 112. Second opening;

[0034] 20. Sensor; 21. Connecting part; 22. Sensing part;

[0035] 30. Locking element; 31. Body; 32. First stop; 33. Adjustment hole; 34. Second stop; 35. Abutment part;

[0036] 40. Elastic element; 41. Through hole;

[0037] 50. Mounting groove; 60. First protrusion; 70. Second protrusion; 80. First receiving portion; 90. Second receiving portion; 110. Sealing ring; 120. Stepped portion;

[0038] 200. Installation structure. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0045] See Figure 1 and Figure 2 One embodiment of this application provides a sensor connection device 100, including a base 10 and a sensor 20. The base 10 is used to connect to a mounting structure 200, and the sensor 20 is mounted on the base 10, thus connecting the sensor 20 and the mounting structure 200 through the base 10. The mounting structure 200 is used to store fluid or allow fluid to flow through it, and the sensor 20 can detect parameters of the fluid within the mounting structure 200.

[0046] Optionally, the mounting structure 200 can be a pipe or a liquid storage tank, etc., and is not limited thereto. As an example, the mounting structure 200 is a pipe with mounting holes, and the base 10 is inserted through the mounting holes as shown in the figure. Figure 1 and Figure 2As shown, a gap is left between the base 10 and the mounting hole for easy installation. The base 10 and the pipe are then fixed by welding to fill the gap. Welding can ensure the connection strength and sealing of the base 10 and the pipe.

[0047] It should be noted that the type of sensor 20 is not limited. In some embodiments, sensor 20 can be a temperature sensor. In other embodiments, sensor 20 can be a pressure sensor. In still other embodiments, sensor 20 can be a sensor that detects other parameters.

[0048] Further reading Figures 3-5 The base 10 is located along the first direction ( Figure 3 and Figure 5 A mounting cavity 11 is provided through the center (Z direction), with a first opening 111 and a second opening 112 formed at both ends of the mounting cavity 11. The sensor 20 includes a connecting part 21 and a sensing part 22 connected to each other. The connecting part 21 is sleeved onto the base 10 to seal the first opening 111. The sensing part 22 is installed inside the mounting cavity 11 and partially protrudes through the second opening 112. When the base 10 is mounted on the mounting structure 200, the second opening 112 of the mounting cavity 11 communicates with the inner cavity of the mounting structure 200. Since the sensing part 22 protrudes through the second opening 112, it can extend into the inner cavity of the mounting structure 200 to detect fluid parameters. Furthermore, because the connecting part 21 is sleeved onto the base 10 and seals the first opening 111, fluid will not flow out of the mounting cavity 11 to the outside, preventing fluid leakage. It should be noted that the connecting part 21 of the sensor 20 is used to connect to an external structure so that the external structure can acquire the parameters detected by the sensor 20.

[0049] The sensor connection device 100 further includes a locking member 30 and an elastic member 40. The locking member 30 is elastic and is clamped outside the base 10 and the connecting portion 21 to lock the base 10 and the connecting portion 21. That is, the locking member 30 is clamped outside the base 10 and the connecting portion 21 so that the base 10 and the connecting portion 21 can be locked under the action of elastic tightening force, and the base 10 and the connecting portion 21 can be separated when the locking member 30 is removed from at least one of the base 10 and the connecting portion 21. The elastic member 40 is compressed and abutted between the base 10 and the connecting portion 21 in a first direction to provide an abutting force that makes the base 10 and the connecting portion 21 abut tightly against the abutting portion 35 of the locking member 30 in the first direction. The locking member 30 abuts against the base 10 and the connecting portion 21 to limit their displacement in the first direction.

[0050] It should be noted that the locking member 30 is not only clamped to the outside of the base 10 and the connecting part 21, but also has two abutting parts 35 that abut against the base 10 and the connecting part 21 respectively along the first direction (see...). Figure 5Since the elastic element 40 is compressed between the base 10 and the connecting portion 21 along the first direction, the compressed elastic element 40 has a tendency to return to its original position, providing a contact force that allows the base 10 and the connecting portion 21 to abut tightly against the abutting portion 35 of the locking element 30 along the first direction. Under the action of the contact force, the base 10 and the connecting portion 21 abut tightly against the abutting portion 35 of the locking element 30, forming a self-locking effect. The contact force has a tendency to cause the connecting portion 21 and the base 10 to shift or separate. The two abutting portions 35 abut against the base 10 and the connecting portion 21 respectively, restricting the shift of the connecting portion 21 and the base 10. Under this action, the base 10 and the connecting portion 21 are locked.

[0051] It should be noted that the preload provided by the compression of the elastic element 40 has been calculated and tested to ensure that the abutment force under the maximum expected vibration conditions keeps the base 10 and the connecting part 21 in close contact at all times.

[0052] The sensor connection device 100 provided in this application embodiment has a sensor 20 and a base 10 sleeved together and locked by a locking member 30 clamped to the outside. At this time, the locking member 30 locks the base 10 and the connecting part 21 in a direction intersecting with the first direction. Furthermore, since the elastic member 40 is compressed and abuts against the base 10 and the connecting part 21 in the first direction, the abutting force applied by the elastic member 40 makes the base 10 and the connecting part 21 abut tightly against the locking member 30, thereby preventing the base 10 and the connecting part 21 from moving relative to each other in the first direction and shifting. Thus, compared to the existing technology that uses threaded fixing, the locking member 30 and the elastic member 40 work together to lock the sensor 20 and the base 10. Vibration will not cause the sensor 20 to loosen from the base 10. The abutting force provided by the elastic member 40 will make the base 10 and the connecting part 21 abut against the locking member 30 more tightly under vibration, so that the sensor 20 is firmly fixed on the base 10. This not only ensures the sealing performance and reduces the occurrence of electrolyte leakage, but also reduces the occurrence of problems such as measurement distortion of the sensor 20.

[0053] In some embodiments, the base 10 is a tubular structure, with the first direction being the axial direction of the base 10. The locking member 30 can radially fix the base 10 and the connecting portion 21, and the abutting portion 35 can abut against the base 10 and the connecting portion 21 axially. Under the abutting force provided by the elastic member 40, the base 10 and the connecting portion 21 abut against the locking member 30 more tightly, thereby keeping the base 10 and the connecting portion 21 fixed axially. Furthermore, under the frictional force between the locking member 30 and the connecting portion 21 and the base 10, the base 10 and the connecting portion 21 can also be kept fixed circumferentially. Thus, the connecting portion 21 and the base 10 remain fixed in the radial, axial, and circumferential directions, resulting in a better fixing effect between the base 10 and the sensor 20.

[0054] In some embodiments, see further reference. Figure 5Of the base 10 and the connecting portion 21, the one sleeved on the outside is called the outer sleeve, and the other is called the inner sleeve. The outer sleeve has a stepped portion 120 inside, and the elastic member 40 is located inside the outer sleeve and abuts against the end face of the stepped portion 120 and the inner sleeve along a first direction. This arrangement of the elastic member 40 inside the outer sleeve reduces the volume of the sensor connection device 100 compared to placing it outside. Furthermore, the outer sleeve has a limiting effect on the elastic member 40, preventing displacement and locking failure.

[0055] It should be understood that in other embodiments, the elastic element 40 may also be disposed outside the base 10 and the connecting portion 21. For example, if both the base 10 and the connecting portion 21 have outward protrusions, the elastic element 40 may be disposed between the two outward protrusions, and may also apply abutting force to the base 10 and the connecting portion 21.

[0056] In some specific embodiments, the base 10 serves as the outer sleeve and the connecting portion 21 serves as the inner sleeve. In this way, the base 10 is located outside the connecting portion 21, and the base 10 can play a protective role for the connecting portion 21.

[0057] Further reading Figure 4 The elastic member 40 is provided with a through hole 41, and the sensing part 22 passes through the through hole 41 and extends out through the second opening 112. This arrangement of the sensing part 22 passing through the through hole 41, compared with the arrangement of the sensing part 22 and the elastic member 40 side by side in the mounting cavity 11, allows the mounting cavity 11 to be smaller, thereby reducing the volume of the sensor connection device 100.

[0058] Optionally, the elastic element 40 is a spring. It should be understood that in other embodiments, the structure of the elastic element 40 is not limited, and the elastic element 40 may also be an elastic pad, etc.

[0059] In some embodiments, see further reference. Figure 5 At least one of the connecting part 21 and the base 10 is provided with a mounting groove 50. The sensor connection device 100 also includes a sealing ring 110, which is installed in the mounting groove 50 to seal the connecting part 21 and the base 10. By providing a sealing ring 110 between the connecting part 21 and the base 10, the sealing effect between the connecting part 21 and the base 10 is ensured, and fluid leakage can be prevented.

[0060] In some embodiments, see Figure 6The locking member 30 includes a body 31 and a first stop 32. The body 31 is annular with a first end and a second end formed at its two ends. The first stop 32 is connected to the first end and folded outward. The first end is provided with an adjustment hole 33. The locking member 30 also includes a second stop 34, which is connected to the end of the second end and folded outward. The second stop 34 extends through the adjustment hole 33 and can move along the adjustment hole 33, that is, its position relative to the adjustment hole 33 is adjustable in the circumferential direction.

[0061] With the above configuration, when the locking member 30 needs to be clamped outside the base 10 and the connecting part 21, the first stop 32 and the second stop 34 can be used as grips. By gripping the first stop 32 and the second stop 34, the position of the second stop 34 relative to the adjustment hole 33 is changed, thereby changing the inner diameter of the locking member 30 to fit the locking member 30 outside the base 10 and the connecting part 21 or to disassemble the locking member 30. The installation and disassembly of the locking member 30 can be achieved without the need for special tools, making the installation and disassembly more convenient. Furthermore, since the first stop 32 and the second stop 34 are folded outward relative to the first end and the second end, respectively, when the inner diameter of the locking member 30 is adjusted to the maximum, the first stop and the second stop 34 can abut against each other to limit the separation of the two ends of the body 31 and ensure the fixing effect.

[0062] It is conceivable that in some other embodiments, the structure of the locking member 30 is not limited. For example, the locking member 30 can be configured to have openings at both ends. When the locking member 30 is clamped outside the connecting part 21 and the base 10, the two ends of the locking member 30 are tightened and the two ends of the locking member 30 are connected and fixed by fasteners.

[0063] In some embodiments, see further reference. Figure 3 and Figure 6 One of the base 10 and the locking member 30 is provided with a first protrusion 60, and the other is provided with a first receiving portion 80. The first protrusion 60 is accommodated and limited within the first receiving portion 80. The inner wall of the first protrusion 60 or the first receiving portion 80 on the locking member 30 forms an abutment portion 35 that abuts against the base 10. The first protrusion 60 and the inner wall of the first receiving portion 80 abut tightly under the action of abutment force. Thus, when the locking member 30 is sleeved on the base 10, the first protrusion 60 is accommodated within the first receiving portion 80. Under the cooperative action of the first protrusion 60 and the first receiving portion 80, the locking effect of the locking member 30 on the base 10 can be improved.

[0064] Furthermore, one of the connecting portion 21 and the locking member 30 is provided with a second protrusion 70, and the other is provided with a second receiving portion 90. The second protrusion 70 is contained within the second receiving portion 90. The inner wall of the second protrusion 70 or the second receiving portion 90 on the locking member 30 forms an abutment portion 35 that abuts against the connecting portion 21. The second protrusion 70 and the inner wall of the second receiving portion 90 abut tightly under the action of the abutment force. Thus, when the locking member 30 is sleeved on the connecting portion 21, the second protrusion 70 is received into the second receiving portion 90. Under the cooperation of the second protrusion 70 and the second receiving portion 90, the locking effect of the locking member 30 on the connecting portion 21 can be improved.

[0065] For some specific implementation methods, please refer to [link / reference]. Figure 3 and Figure 6 The first receiving portion 80 and the second receiving portion 90 are both provided on the body 31 of the locking member 30, the first protrusion 60 is provided on the base 10, and the second protrusion 70 is provided on the connecting portion 21. Specifically, the first receiving portion 80 and the second receiving portion 90 are the first receiving hole and the second receiving hole provided on the body 31, the first protrusion 60 is received in the first receiving hole, and the second protrusion 70 is received in the second receiving hole.

[0066] It is conceivable that in some other embodiments, the specific structure of the first receiving portion 80 and the second receiving portion 90 is not limited. For example, the first receiving portion 80 and the second receiving portion 90 may be configured as receiving grooves or other structures.

[0067] Another embodiment of this application provides a flow battery, which includes a pipe and the aforementioned sensor connection device 100. The base 10 of the sensor connection device 100 is fixedly connected to the pipe. The mounting cavity 11 communicates with the inner cavity of the pipe, and the sensing unit 22 can extend into the inner cavity of the pipe through the second opening 112. Since the aforementioned sensor connection device 100 has beneficial effects, the flow battery including the aforementioned sensor connection device 100 has the same beneficial effects, which will not be described again here.

[0068] Optionally, the pipes included in the flow battery can be inlet pipes that allow the electrolyte to flow from the storage tank to the stack, or return pipes that allow the electrolyte to flow back from the stack to the storage tank, etc., without limitation.

[0069] In some embodiments, the pipe has mounting holes, and the base 10 passes through the mounting holes and is welded to the pipe. Welding ensures the connection strength and sealing between the base 10 and the pipe. In other embodiments, the pipe has mounting holes, and the base 10 passes through the mounting holes and is fixedly connected to the pipe via threaded fittings. The method of fixing the base 10 to the pipe via threaded fittings facilitates the installation and removal of the sensor connection device 100.

[0070] It should be noted that the flow battery can be a vanadium redox flow battery or other types of flow batteries, and no limitation is made here.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A sensor connection device, characterized in that, include: The base (10) has a mounting cavity (11) extending through it along a first direction. The two ends of the mounting cavity (11) form a first opening (111) and a second opening (112), respectively. The sensor (20) includes a connecting part (21) and a sensing part (22) connected to each other. The connecting part (21) is sleeved with the base (10) to block the first opening (111). The sensing part (22) is installed in the mounting cavity (11) and extends through the second opening (112). A resilient locking element (30) is clamped around the base (10) and the connecting part (21) to lock the base (10) and the connecting part (21); An elastic member (40) is compressed and abutted between the base (10) and the connecting portion (21) along the first direction to provide abutting force such that the base (10) and the connecting portion (21) abut against the abutting portion (35) of the locking member (30) along the first direction, the locking member (30) abutting against the base (10) and the connecting portion (21) to restrict their displacement along the first direction.

2. The sensor connection device according to claim 1, characterized in that, Of the base (10) and the connecting part (21), the one that is sleeved on the outside is the outer sleeve and the other is the inner sleeve. The outer sleeve has a stepped part (120) inside. The elastic member (40) is located inside the outer sleeve and abuts against the end face of the stepped part (120) and the inner sleeve along the first direction.

3. The sensor connection device according to claim 2, characterized in that, The elastic element (40) is provided with a through hole (41), and the sensing part (22) passes through the through hole (41) and extends out through the second opening (112).

4. The sensor connection device according to claim 3, characterized in that, The elastic element (40) is a spring.

5. The sensor connection device according to claim 2, characterized in that, The base (10) serves as the outer sleeve, and the connecting part (21) serves as the inner sleeve.

6. The sensor connection device according to claim 1, characterized in that, At least one of the connecting part (21) and the base (10) is provided with a mounting groove (50), and the sensor connecting device further includes a sealing ring (110), which is installed in the mounting groove (50) to seal the connecting part (21) and the base (10).

7. The sensor connection device according to claim 1, characterized in that, One of the base (10) and the locking member (30) is provided with a first protrusion (60), and the other is provided with a first receiving portion (80). The first protrusion (60) is contained in the first receiving portion (80). The inner wall of the first protrusion (60) or the first receiving portion (80) provided on the locking member (30) forms an abutment portion (35) that abuts against the base (10). The first protrusion (60) and the inner wall of the first receiving portion (80) abut tightly under the action of the abutment force. and / or One of the connecting part (21) and the locking member (30) is provided with a second protrusion (70), and the other is provided with a second receiving part (90). The second protrusion (70) is contained in the second receiving part (90). The inner wall of the second protrusion (70) or the second receiving part (90) provided on the locking member (30) forms an abutting part (35) that abuts against the connecting part (21). The second protrusion (70) and the inner wall of the second receiving part (90) abut tightly under the action of the abutting force.

8. The sensor connection device according to any one of claims 1-7, characterized in that, The locking member (30) includes a body (31) and a first stop (32). The body (31) is annular and has a first end and a second end formed at both ends. The first stop (32) is connected to the end of the first end and folded outward. The first end is provided with an adjustment hole (33). The locking member (30) further includes a second stop (34), which is connected to the end of the second end and folded outward; The second stop (34) extends out of the adjustment hole (33) and is movable along the adjustment hole (33) in the circumferential direction.

9. A flow battery, characterized in that, Includes a pipe and a sensor connection device as described in any one of claims 1-8, wherein the base (10) of the sensor connection device is fixedly connected to the pipe; The mounting cavity (11) is connected to the inner cavity of the pipe, and the sensing part (22) can extend into the inner cavity of the pipe through the second opening (112).

10. The flow battery according to claim 9, characterized in that, The pipe is provided with an installation hole, and the base (10) passes through the installation hole and is welded and fixed to the pipe, or the base (10) is fixedly connected to the pipe by a threaded part.

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