Pressure detection device and system thereof

Abstract

The utility model discloses a pressure detection device and a system thereof. The pressure detection device comprises a first fixing plate, a first adjusting plate which is movably arranged relative to the first fixing plate, a second fixing plate, a second adjusting plate which is movably arranged relative to the second fixing plate, and a ventilation cylinder which is arranged in the second fixing plate. An adjustable first space is formed between the first adjusting plate and the first fixing plate, an adjustable second space is formed between the second adjusting plate and the second fixing plate, and the first space and the second space are located at relatively vertical staggered positions; a sealing ring embedded in the second fixing plate is arranged on the periphery of the ventilation cylinder. According to the utility model, the accuracy of the detection result of the opening pressure of the explosion-proof valve is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery detection, and in particular relates to a pressure detection device and a system thereof. Background Art

[0002] The explosion-proof valve is a safety valve used in battery modules or energy storage devices. Its main function is to monitor the pressure and temperature inside the battery. When the pressure or temperature exceeds the set value, the explosion-proof valve will rupture from the notch and release the pressure to reduce the pressure inside the battery and avoid explosion accidents. The explosion value of the explosion-proof valve of new energy batteries refers to the pressure threshold at which the explosion-proof valve instantly opens and releases the internal gas after being subjected to a certain pressure. The explosion value of the explosion-proof valve of new energy batteries is generally set to 0.5-1.0MPa. The selection of the explosion value needs to be determined according to the specific battery type and usage scenario. Generally, the maximum charging and discharging pressure of the battery, as well as factors such as temperature rise and current, should be considered. The selection of the explosion value also needs to consider the manufacturing process and material characteristics of the explosion-proof valve to ensure that the explosion-proof valve can be reliably opened and released within a certain range. The internal gas, and the explosion-proof valve itself will not fail or be damaged due to the explosion value range. Therefore, it is particularly important to accurately test the opening pressure of the explosion-proof valve at the cell end.

[0003] The existing test of the opening pressure of the explosion-proof valve is carried out by removing the explosion-proof valve from the battery housing and performing a pressure test on the single explosion-proof valve. However, the test cannot be carried out in the actual assembly environment of the explosion-proof valve, resulting in deviations in the test results. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide a pressure detection device and a system thereof, so as to improve the accuracy of the detection result of the opening pressure of the explosion-proof valve. In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] The pressure detection device comprises a first fixed plate, a first adjustment plate movably arranged relative to the first fixed plate, a second fixed plate, a second adjustment plate movably arranged relative to the second fixed plate, and a ventilator arranged in the second fixed plate;

[0006] An adjustable first space is formed between the first adjustment plate and the first fixed plate, an adjustable second space is formed between the second adjustment plate and the second fixed plate, the first space and the second space are in a relatively vertically staggered position, and a sealing ring embedded in the second fixed plate is provided on the outer periphery of the ventilator.

[0007] The battery casing is positioned in the first space and the second space, and the battery casing can be accurately and stably positioned through the first fixing plate and the first adjusting plate and the second fixing plate and the second adjusting plate; a vent is provided in the second fixing plate, and the side wall of the battery casing is pierced by the vent and the interior of the battery casing is inflated, so as to realize air pressure testing in the real environment of the battery casing, thereby improving the accuracy and efficiency of the explosion-proof valve opening pressure test.

[0008] Specifically, the ventilation cylinder is arranged through the second fixing plate, one end of the ventilation cylinder is arranged toward the second adjustment plate, and the other end of the ventilation cylinder is arranged away from the second adjustment plate. The ventilation cylinder is provided with a through airway, and the ventilation cylinder is connected to an air source docking with the airway.

[0009] The air pressure device controls the air pressure value and the air flow rate of the gas, making it easy to detect the air pressure through a ventilator.

[0010] Specifically, a plurality of first adjusting members are disposed between the first fixing plate and the first adjusting plate, one end of the first adjusting member is connected to the first fixing plate, and the other end of the first adjusting member passes through the first adjusting plate.

[0011] It is convenient to assemble and adjust the first adjusting plate and the first fixing plate.

[0012] Specifically, the end of the first adjusting member is provided with a first adjusting knob which is threadably matched with the first adjusting member.

[0013] The first adjusting knob cooperates with the first adjusting member to facilitate adjustment of the distance between the first adjusting plate and the first fixing plate.

[0014] Specifically, the first adjusting members are respectively located at four vertex corners of the first fixing plate.

[0015] Maintain stable assembly of the first adjustment plate and the first fixing plate.

[0016] Specifically, the second fixing plate is disposed on one side of the first fixing plate, a positioning plate is disposed on the other side of the first fixing plate, and the second adjusting plate is movably mounted on the positioning plate.

[0017] The second adjusting plate and the second fixing plate are convenient to assemble and adjust.

[0018] Specifically, the second adjustment plate is movably arranged on the side of the positioning plate facing the second fixed plate, and a plurality of second adjustment members are arranged between the second adjustment plate and the positioning plate, one end of the second adjustment member is connected to the second adjustment plate, and the other end of the second adjustment member passes through the positioning plate.

[0019] The second adjusting member cooperates with the positioning plate to realize the movement and adjustment function of the second adjusting member.

[0020] Specifically, a second adjusting knob threadably matched with the second adjusting member is disposed at the end of the second adjusting member.

[0021] The second adjusting knob cooperates with the second adjusting member to facilitate adjustment of the distance between the second adjusting plate and the second fixing plate.

[0022] Specifically, a limiting side plate is arranged on the first fixing plate, the limiting side plate is arranged perpendicularly to the first fixing plate, and the limiting side plate is perpendicularly to the second fixing plate.

[0023] The limiting side plate cooperates with the first fixing plate, and the limiting side plate also cooperates with the second fixing plate to achieve a multi-directional positioning function.

[0024] The pressure detection system includes the pressure detection device described above, the battery shell is positioned in the first space and the second space, the two ends of the battery shell are clamped and positioned between the first fixing plate and the first adjusting plate, the two sides of the battery shell are clamped and positioned between the second fixing plate and the second adjusting plate, the vent pierces the side wall of the battery shell to form a breach, and the sealing ring is sealed and abutted against the outer periphery of the breach.

[0025] In the pressure detection system, the battery casing is positioned on the pressure detection device, so that the pressure detection device can efficiently locate the battery casing and accurately detect the opening pressure of the explosion-proof valve of the battery casing.

[0026] Compared with the prior art, the pressure detection device and system of the utility model have the following beneficial effects:

[0027] The range of the first space is adjusted by the cooperation of the first fixing plate and the first adjusting plate, and the range of the second space is adjusted by the cooperation of the second fixing plate and the second adjusting plate. The first space and the second space are vertically intertwined with each other, and the battery shell is located in the first space and the second space, so the battery shell can be accurately and stably positioned; a vent is arranged in the second fixing plate, and the side wall of the battery shell is pierced by the vent and the interior of the battery shell is inflated to realize air pressure testing in the real environment of the battery shell. In the process of adjusting the second adjusting plate, the vent in the corresponding second fixing plate pierces the battery shell. The puncturing method is easy to operate, which improves the accuracy and efficiency of the explosion-proof valve opening pressure test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of positioning a battery housing for a pressure detection device provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of the structure of a pressure detection device provided in an embodiment of the present application.

[0030] Reference numerals:

[0031] The first fixing plate 1, the limiting side plate 11;

[0032] The first adjusting plate 2, the first adjusting member 21, the first adjusting knob 22;

[0033] The second fixing plate 3, the positioning plate 31;

[0034] The second adjusting plate 4, the second adjusting member 41, the second adjusting knob 42;

[0035] The ventilation cylinder 5, the air passage 51, the sealing ring 52, the sealing groove 53;

[0036] The battery housing 6, the explosion-proof valve 61. Detailed implementation manners

[0037] In order to make the technical solutions and advantages in the embodiments of the present application clearer, the following further describes the exemplary embodiments of the present application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0038] Embodiment 1

[0039] The present embodiment provides a pressure detection device for testing the opening air pressure data of the explosion-proof valve 61 in the battery. The pressure test is carried out in the real environment where the explosion-proof valve 61 is installed on the battery housing 6. The battery housing 6 is punctured, and then the puncture position is inflated to simulate the increase in the internal air pressure of the battery housing 6. When the air pressure in the battery housing 6 exceeds the opening threshold of the explosion-proof valve 61, the explosion-proof valve 61 opens, and then the opening air pressure data of the explosion-proof valve 61 is obtained, so as to accurately evaluate the performance of the explosion-proof valve 61 and the overall performance of the battery.

[0040] Figure 1 Schematic diagram of the structure for positioning the battery housing of the pressure detection device provided by the embodiment of the present application; Figure 2 Schematic diagram of the structure of the pressure detection device provided by the embodiment of the present application.

[0041] As Figure 1 、 Figure 2As shown, this embodiment provides a pressure detection device, including a first fixed plate 1, a first adjustment plate 2 movably arranged relative to the first fixed plate 1, a second fixed plate 3, a second adjustment plate 4 movably arranged relative to the second fixed plate 3, and a vent 5 arranged in the second fixed plate 3; a first space adjustable in the longitudinal direction is formed between the first adjustment plate 2 and the first fixed plate 1, and a second space adjustable in the transverse direction is formed between the second adjustment plate 4 and the second fixed plate 3, and the first space and the second space are in a relatively vertical staggered position.

[0042] The first space and the second space provided in this embodiment jointly position the battery housing 6, the two ends of the battery housing 6 are clamped and positioned between the first fixing plate 1 and the first adjustment plate 2, and the two sides of the battery housing 6 are clamped and positioned between the second fixing plate 3 and the second adjustment plate 4, thereby keeping the four sides of the battery housing 6 in a positioned state, ensuring the positioning stability of the battery housing 6.

[0043] The ventilation cylinder 5 is arranged to pass through the second fixed plate 3, with one end of the ventilation cylinder 5 arranged to face the second adjustment plate 4, and the other end of the ventilation cylinder 5 arranged to face away from the second adjustment plate 4. A through airway 51 is arranged in the ventilation cylinder 5, and the ventilation cylinder 5 is connected to an air source that docks with the airway 51. The air source can be provided by an air pressure device (not shown in the figure), which controls the air pressure value and the flow rate of the gas.

[0044] In this embodiment, a sealing ring 52 is provided on the outer periphery of the vent cylinder 5 and is embedded in the second fixed plate 3. A sealing groove 53 is provided on the side of the second fixed plate 3. The center of the sealing groove 53 is located in the same straight line as the axis of the vent cylinder 5. Part of the sealing ring 52 is embedded in the sealing groove 53, and part of the sealing ring 52 is exposed outside the sealing groove 53, thereby realizing the crimping sealing effect between the sealing ring 52 and the side wall of the battery casing 6.

[0045] Specific pressure testing process of the explosion-proof valve 61 of the battery casing 6: when the first fixed plate 1 and the first adjustment plate 2 position the two ends of the battery casing 6 in place, the battery casing 6 is positioned in the first space and is subject to longitudinal limitation, and the second adjustment plate 4 moves relative to the second fixed plate 3. As the second adjustment plate 4 moves to reduce the distance in the second space, the two sides of the battery casing 6 are positioned until the vent tube 5 pierces the side wall of the battery casing 6 to form a breach, and the vent tube 5 enters the breach to achieve the second fixed plate 3 and the side wall of the battery casing 6 being crimped and abutted, and the sealing ring 52 is sealed and abutted against the outer periphery of the breach in the side wall of the battery casing 6, and the internal inflation of the battery casing 6 is detected by the vent tube 5. When a certain air pressure is met, the explosion-proof valve 61 of the battery casing 6 is opened, and the air pressure device can obtain the air pressure data of the opening of the explosion-proof valve 61.

[0046] In this embodiment, the range adjustment of the first space is achieved by the cooperation of the first fixed plate 1 and the first adjusting plate 2, and the range adjustment of the second space is achieved by the cooperation of the second fixed plate 3 and the second adjusting plate 4. The first space and the second space are vertically staggered with each other, and the battery casing 6 can be accurately and stably positioned; a vent 5 is arranged in the second fixed plate 3, and the side wall of the battery casing 6 is pierced by the vent 5 and the interior of the battery casing 6 is inflated to achieve air pressure testing in the real environment of the battery casing 6. In the process of adjusting the second adjusting plate 4, the vent 5 in the corresponding second fixed plate 3 pierces the battery casing 6. The puncturing method is easy to operate, which improves the accuracy and efficiency of the pressure test of opening the explosion-proof valve 61.

[0047] Embodiment 2

[0048] This embodiment optimizes the pressure detection device on the basis of the above embodiment, especially provides a specific implementation method of the first fixing plate and the first adjusting plate:

[0049] The first fixed plate 1 and the first adjustment plate 2 are arranged relatively spaced apart, and a first space is formed between the first fixed plate 1 and the first adjustment plate 2. By adjusting the distance of the first adjustment plate 2 relative to the first fixed plate 1, the spatial range of the first space is adjusted, which means that the first fixed plate 1 and the first adjustment plate 2 are arranged in a longitudinal orientation, and the first adjustment plate 2 is arranged to move longitudinally relative to the first fixed plate 1.

[0050] Figure 1 A schematic diagram of the structure of positioning a battery housing for a pressure detection device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a pressure detection device provided in an embodiment of the present application.

[0051] like Figure 1 , Figure 2 As shown, the first fixing plate 1 can be in the shape of a square plate, a rectangular plate, a circular plate or other special-shaped plates, the first adjusting plate 2 can be in the shape of a square plate, a rectangular plate, a circular plate or other special-shaped plates, the shapes of the first adjusting plate 2 and the first fixing plate 1 can be the same or different, and the specific size of the first adjusting plate 2 can be the same or different from the size of the first fixing plate 1. In this embodiment, the first adjusting plate 2 and the first fixing plate 1 are both rectangular plates and have the same size, which facilitates the assembly and adjustment of the first adjusting plate 2 and the first fixing plate 1.

[0052] A plurality of first adjusting members 21 are provided between the first fixing plate 1 and the first adjusting plate 2. One end of the first adjusting member 21 is connected to the first fixing plate 1, and the other end of the first adjusting member 21 passes through the first adjusting plate 2. A first adjusting knob 22 threadedly engaged with the first adjusting member 21 is provided at the end of the first adjusting member 21. In this embodiment, the first adjusting member 21 is a bolt, and the first adjusting knob 22 is a nut.

[0053] In this embodiment, the number of the first adjusting members 21 is four, and they are respectively located at the four corner positions of the first fixing plate 1 to maintain the connection stability between the first fixing plate 1 and the first adjusting plate 2 .

[0054] By twisting the first adjusting knob 22, the first adjusting knob 22 and the first adjusting plate 2 are pressed against each other, thereby realizing the distance adjustment between the first adjusting plate 2 and the first fixed plate 1. When the battery casing 6 is placed between the first fixed plate 1 and the first adjusting plate 2, the first adjusting plate 2 is adjusted to move and press the end face of the battery casing 6. By tightening the first adjusting knob 22 and cooperating with the first adjusting member 21, the first adjusting plate 2 is kept tightly pressed against the end face of the battery casing 6, and the battery casing 6 is stably positioned in the first space.

[0055] In order to improve the convenience and efficiency of positioning the battery casing 6, a limiting side plate 11 is provided on the first fixed plate 1, which is used to laterally abut against the side wall of the battery casing 6. The limiting side plate 11 is relatively vertically arranged with respect to the first fixed plate 1, and the limiting side plate 11 is relatively vertically arranged with respect to the second fixed plate 3. The limiting side plate 11 can play the role of limiting the battery casing 6. The longitudinal height of the battery side plate relative to the first fixed plate 1 is not greater than the side wall height of the battery casing 6, so that the first adjustment plate 2 can be normally crimped to the top of the battery casing 6 without being hindered by the limiting side plate 11.

[0056] Embodiment 3

[0057] This embodiment optimizes the pressure detection device on the basis of the above embodiment, especially provides a specific implementation method of the second fixing plate and the second adjusting plate:

[0058] A second fixing plate 3 is disposed on one side of the first fixing plate 1 , and a second adjusting plate 4 is disposed on the other side of the first fixing plate 1 .

[0059] Figure 1 A schematic diagram of the structure of positioning a battery housing for a pressure detection device provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a pressure detection device provided in an embodiment of the present application.

[0060] like Figure 1 , Figure 2 As shown, the second fixing plate 3 and the first fixing plate 1 can be connected by means of clamping, welding, screwing, etc. In this embodiment, the second fixing plate 3 and the first fixing plate 1 are fixed by welding, and the second fixing plate 3 and the first fixing plate 1 are arranged vertically relative to each other.

[0061] A positioning plate 31 is provided on the top of the first fixed plate 1 and on the opposite side of the second fixed plate 3. The second adjustment plate 4 is movably mounted on the positioning plate 31. The positioning plate 31 and the first fixed plate 1 can be connected by snapping, welding, screwing, etc. In this embodiment, the positioning plate 31 and the first fixed plate 1 are fixed by welding, and the positioning plate 31 and the first fixed plate 1 are relatively vertically arranged.

[0062] The second adjustment plate 4 is movably arranged on the side of the positioning plate 31 facing the second fixing plate 3, and a plurality of second adjustment members 41 are arranged between the second adjustment plate 4 and the positioning plate 31. One end of the second adjustment member 41 is connected to the second adjustment plate 4, and the other end of the second adjustment member 41 passes through the positioning plate 31. The end of the second adjustment member 41 is provided with a second adjustment knob 42 threadedly matched therewith. In this embodiment, the second adjustment member 41 is a bolt, and the second adjustment knob 42 is a nut.

[0063] In this embodiment, the number of the second adjusting members 41 is two, and they are respectively located on both sides of the positioning plate 31 to maintain the stability of the second adjusting members 41 during the adjustment process.

[0064] By twisting the second adjusting knob 42, the second adjusting knob 42 and the positioning plate 31 are pressed against each other, thereby realizing the distance adjustment between the second adjusting plate 4 and the second fixing plate 3. When the battery casing 6 is placed between the second fixing plate 3 and the second adjusting plate 4, the second adjusting plate 4 is adjusted to move and press against the side wall of the battery casing 6. By tightening the second adjusting knob 42 and cooperating with the second adjusting member 41, the second adjusting plate 4 is kept tightly pressed against the side wall of the battery casing 6, and the battery casing 6 is stably positioned in the second space.

[0065] In order to improve the stability of the movement and adjustment process of the second adjustment plate 4, the bottom of the second adjustment plate 4 can be slidably abutted against the top of the first fixed plate 1. When the second adjustment plate 4 is adjusted by the second adjustment member 41, it can smoothly push the battery casing 6 close to the second fixed plate 3, and the vent 5 in the second fixed plate 3 can effectively pierce the side wall of the battery casing 6.

[0066] The side wall of the battery housing 6 is provided with an explosion-proof valve 61, and the explosion-proof valve 61 is located on the side of the battery housing 6 away from the limiting side plate 11, so as to avoid the influence on the air pressure test result caused by the blocking of the limiting side plate 11 or the second fixing plate 3 or the second adjusting plate 4. The specific structure of the explosion-proof valve 61 is not repeated here.

[0067] Embodiment 4

[0068] The present embodiment provides a pressure detection system, including the pressure detection device in the above-mentioned embodiment, wherein a battery casing is positioned in the first space and the second space, the two ends of the battery casing are clamped and positioned between the first fixing plate and the first adjusting plate, the two sides of the battery casing are clamped and positioned between the second fixing plate and the second adjusting plate, the vent pierces the side wall of the battery casing to form a breach, and the sealing ring is sealed against the outer periphery of the breach.

[0069] In the pressure detection system, the battery casing is positioned on the pressure detection device, so that the pressure detection device can efficiently locate the battery casing and accurately detect the opening pressure of the explosion-proof valve of the battery casing.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A pressure detection device, characterized in that: It comprises a first fixing plate (1), a first adjusting plate (2) movably arranged relative to the first fixing plate (1), a second fixing plate (3), a second adjusting plate (4) movably arranged relative to the second fixing plate (3), and a ventilator (5) arranged in the second fixing plate (3); An adjustable first space is formed between the first adjustment plate (2) and the first fixed plate (1), and an adjustable second space is formed between the second adjustment plate (4) and the second fixed plate (3). The first space and the second space are in a relatively vertically staggered position, and a sealing ring (52) embedded in the second fixed plate (3) is provided on the outer periphery of the ventilator (5).

2. The pressure detection device according to claim 1, characterized in that: The ventilation cylinder (5) is arranged to pass through the second fixing plate (3), one end of the ventilation cylinder (5) is arranged to face the second adjustment plate (4), and the other end of the ventilation cylinder (5) is arranged to face away from the second adjustment plate (4), a through air passage (51) is arranged in the ventilation cylinder (5), and the ventilation cylinder (5) is connected to an air source that docks with the air passage (51).

3. The pressure detection device according to claim 1, characterized in that: A plurality of first adjusting members (21) are arranged between the first fixing plate (1) and the first adjusting plate (2), one end of the first adjusting member (21) is connected to the first fixing plate (1), and the other end of the first adjusting member (21) passes through the first adjusting plate (2).

4. The pressure detection device according to claim 3, characterized in that: The end of the first adjusting member (21) is provided with a first adjusting knob (22) threadably matched therewith.

5. The pressure detection device according to claim 3, characterized in that: A plurality of the first adjusting members (21) are respectively located at the four corner positions of the first fixing plate (1).

6. The pressure detection device according to claim 1, characterized in that: The second fixing plate (3) is arranged on one side of the first fixing plate (1), a positioning plate (31) is arranged on the other side of the first fixing plate (1), and the second adjustment plate (4) is movably mounted on the positioning plate (31).

7. The pressure detection device according to claim 6, characterized in that: The second adjustment plate (4) is movably arranged on a side of the positioning plate (31) facing the second fixing plate (3), and a plurality of second adjustment members (41) are arranged between the second adjustment plate (4) and the positioning plate (31), one end of the second adjustment member (41) is connected to the second adjustment plate (4), and the other end of the second adjustment member (41) passes through the positioning plate (31).

8. The pressure detection device according to claim 7, characterized in that: The end of the second adjusting member (41) is provided with a second adjusting knob (42) which is threadably matched therewith.

9. The pressure detection device according to claim 1, characterized in that: A limiting side plate (11) is arranged on the first fixing plate (1), the limiting side plate (11) is arranged perpendicularly relative to the first fixing plate (1), and the limiting side plate (11) is arranged perpendicularly relative to the second fixing plate (3).

10. Pressure detection system, characterized in that: It comprises a pressure detection device as described in any one of claims 1 to 9, a battery casing (6) is positioned in the first space and the second space, the first fixing plate (1) and the first adjusting plate (2) respectively clamp the two ends of the battery casing (6), the second fixing plate (3) and the second adjusting plate (4) respectively clamp the two sides of the battery casing (6), the vent tube (5) pierces the side wall of the battery casing (6) to form a breach, and the sealing ring (52) is sealed against the outer periphery of the breach.

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