Pressure-resistant bursting test tool and pressure-resistant bursting test system

Abstract

The present application belongs to the technical field of pressure-resistant bursting tests. Provided are a pressure-resistant bursting test tool and a pressure-resistant bursting test system. The pressure-resistant bursting test tool is configured to test the bursting pressure of a pressure relief component, the pressure relief component comprising a first wall part which is provided with a pressure relief mechanism. The pressure-resistant bursting test tool comprises a first component and a second component, wherein the first component is provided with an inlet channel, the second component is provided with a discharge channel, the second component and the first component are configured to cooperatively clamp the first wall part, and the discharge channel is configured to discharge a fluid medium flowing through the first wall part from the inlet channel when the pressure relief mechanism is actuated. The pressure-resistant bursting test tool provided with such a structure has a simple structure, and when a bursting test is carried out on the pressure relief component, the first component and the second component can directly act on two sides of the first wall part of the pressure relief component, thereby simplifying the test process, and improving the pressure-resistant bursting test quality of the pressure relief component.

Description

Pressure burst test tooling and pressure burst test system Technical Field

[0001] The present application relates to the technical field of pressure-resistant burst testing, and in particular to a pressure-resistant burst testing tool and a pressure-resistant burst testing system. Background Art

[0002] In recent years, new energy vehicles have experienced rapid development. Within the electric vehicle sector, power batteries, as the power source for electric vehicles, play an irreplaceable and important role. With the vigorous promotion of new energy vehicles, the demand for power battery products is also growing. This increasing demand for batteries places higher demands on the reliability of battery cells.

[0003] In battery technology, to improve the reliability of battery cells, pressure relief components can be installed in the cells to relieve pressure in the event of thermal runaway. This component is typically subjected to a pressure burst test to determine its burst pressure. However, the quality of current pressure burst tests for pressure relief components is poor, making it difficult to accurately determine their burst pressure.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a pressure-resistant burst test tool and a pressure-resistant burst test system, which can effectively improve the pressure-resistant burst test quality of pressure relief components.

[0006] In a first aspect, an embodiment of the present application provides a pressure-resistant bursting test fixture for testing the bursting pressure of a pressure relief component, wherein the pressure relief component includes a first wall portion provided with a pressure relief mechanism; the pressure-resistant bursting test fixture includes a first component and a second component, the first component is provided with an entry channel, the second component is provided with an exit channel, the second component and the first component are used to cooperate in clamping the first wall portion, and the exit channel is used to discharge the fluid medium flowing from the entry channel through the first wall portion when the pressure relief mechanism is actuated.

[0007] In the above technical solution, the first wall portion is fixed by the cooperation of the first component and the second component to clamp the first wall portion. After the fluid medium is injected into the inlet channel of the first component, the pressure in the inlet channel will gradually increase until the pressure in the inlet channel reaches the bursting pressure of the pressure relief component, causing the pressure relief mechanism to be actuated. The fluid medium in the inlet channel will flow through the first wall portion and be discharged through the discharge channel of the second component. During this process, the peak pressure in the inlet channel is the bursting pressure of the pressure relief component. The pressure-resistant burst test fixture of this structure is simple. When performing a burst test on the pressure relief component, the first component and the second component can directly act on both sides of the first wall portion of the pressure relief component, which can simplify the test process and improve the quality of the pressure-resistant burst test of the pressure relief component.

[0008] In some embodiments, the first component has a first clamping surface configured to abut against the first wall portion; the entry passage includes a first escape cavity, which forms a first opening on the first clamping surface and is configured to escape the pressure relief mechanism. The provision of the first escape cavity can reduce the impact of the first component squeezing the first wall portion on the strength of the pressure relief mechanism, thereby reducing the risk of premature activation of the pressure relief mechanism during testing, resulting in inaccurate burst pressure measurements of the pressure relief component.

[0009] In some embodiments, the pressure-resistant burst test fixture further includes a first seal disposed on the first component and configured to seal the gap between the first clamping surface and the first wall. The provision of the first seal improves the sealing performance between the first component and the first wall, reducing the risk of fluid entering the channel leaking through the gap between the first clamping surface and the first wall during testing, thereby further improving the quality of the pressure-resistant burst test of the pressure relief component.

[0010] In some embodiments, the first sealing member is an annular structure, and the first sealing member is disposed around the first opening. The annular first sealing member has a simple structure and can well achieve sealing between the first component and the first wall.

[0011] In some embodiments, the first clamping surface is provided with a first limiting groove, and at least a portion of the first sealing member is accommodated in the first limiting groove. The first limiting groove serves to limit the first sealing member, thereby reducing the difficulty of installing the first sealing member.

[0012] In some embodiments, the entry channel further includes a first channel, one end of which extends to the wall surface of the first avoidance chamber opposite the first opening, and the other end of which extends to the outer surface of the first component. This allows the cross-section of the first channel to be smaller than the cross-section of the first avoidance chamber, which not only improves the strength of the first component but also facilitates communication between the entry channel and the fluid medium supply device.

[0013] In some embodiments, the second component has a second clamping surface configured to abut against the first wall portion; the discharge passage includes a second escape cavity, which forms a second opening on the second clamping surface and is configured to escape the pressure relief mechanism. The provision of the second escape cavity can reduce the impact of the second component squeezing the first wall portion on the strength of the pressure relief mechanism, thereby reducing the risk of premature activation of the pressure relief mechanism during testing, which could result in inaccurate burst pressure measurements of the pressure relief component.

[0014] In some embodiments, the pressure burst test fixture further includes a second seal disposed on the second component and configured to seal the gap between the second clamping surface and the first wall. The provision of the second seal can improve the sealing performance between the second component and the first wall, reducing the risk of fluid leakage through the gap between the second clamping surface and the first wall during testing.

[0015] In some embodiments, the second sealing member is an annular structure, and the second sealing member is disposed around the second opening. The annular second sealing member has a simple structure and can well achieve sealing between the second component and the first wall.

[0016] In some embodiments, the second clamping surface is provided with a second limiting groove, and at least a portion of the second sealing member is accommodated in the second limiting groove. The second limiting groove serves to limit the second sealing member, thereby reducing the difficulty of installing the second sealing member.

[0017] In some embodiments, the exhaust passage further includes a second passage, one end of which extends to the wall of the second avoidance cavity opposite the second opening, and the other end of which extends to the outer surface of the second component. This allows the cross-section of the second passage to be smaller than that of the second avoidance cavity, thereby improving the strength of the second component.

[0018] In some embodiments, the second component includes a base and a limiting portion; the base has a second clamping surface, the second clamping surface is used to abut against the first wall portion, the exhaust channel is formed in the base, and the exhaust channel forms a second opening on the second clamping surface; the limiting portion is connected to the base, the limiting portion has an inner side surface, the inner side surface is connected to the second clamping surface, the inner side surface and the second clamping surface jointly define a limiting cavity, the limiting cavity is used to accommodate at least a portion of the pressure relief component, so that the second component and the pressure relief component form a positioning fit. The base and the limiting portion jointly form a limiting cavity, and during the test process, the pressure relief component can form a positioning fit with the limiting cavity, so that the pressure relief component can reach the specified position of the second component more quickly, realize the rapid docking of the pressure relief component and the second component, and enable the second component to accurately press against the first wall portion.

[0019] In some embodiments, the pressure-resistant burst test fixture further includes a drive mechanism configured to drive the first component and the second component toward each other so that the first component and the second component cooperate to clamp the first wall. The drive mechanism drives the first component and the second component toward each other, thereby applying a clamping force to the first wall to improve the sealing between the first component and the second component and the pressure relief component.

[0020] In some embodiments, the driving mechanism includes a fixed member, a movable member, and a driving member; the fixed member includes a first connecting seat, the movable member is movably arranged on the fixed member along a first direction, along the first direction, the movable member is arranged relative to the first connecting seat, the first component and the second component are arranged relative to each other, and are located between the movable member and the first connecting seat; the driving member connects the movable member and the fixed member, and the driving member is configured to drive the movable member to move along the first direction so that the movable member is away from or close to the first connecting seat. By driving the movable member to approach the first connecting seat through the driving member, the first component and the second component can apply a clamping force to the first wall portion, and by driving the movable member away from the first connecting seat through the driving member, the extrusion force applied by the driving mechanism to the first component and the second component can be removed. The driving mechanism has a simple structure and can continuously apply pressure to the first component and the second component, and the pressure relief component can be conveniently removed after the test is completed.

[0021] In some embodiments, the fixing member further includes a second connecting seat and a guide member; the second connecting seat is disposed opposite the first connecting seat along the first direction, the movable member is located between the second connecting seat and the first connecting seat, and the driving member connects the second connecting seat and the movable member; the guide member extends along the first direction, connects the second connecting seat and the first connecting seat, and the movable member is slidably connected to the guide member. By providing the guide member between the first and second connecting seats and slidably connecting the movable member to the guide member, the stability of the movable member's movement along the first direction can be improved, thereby more evenly applying pressure to the first and second components.

[0022] In the second aspect, an embodiment of the present application provides a pressure-resistant bursting test system, comprising a pressure relief component and a pressure-resistant bursting test tooling provided by any embodiment of the first aspect; the pressure relief component comprises a first wall portion provided with a pressure relief mechanism; the second component and the first component cooperate to clamp the first wall portion.

[0023] In some embodiments, the pressure relief component is a housing, comprising a sidewall and a first wall portion, wherein the sidewall is disposed around the first wall portion, the first wall portion is located at one end of the sidewall, and a third opening is formed at the end of the sidewall opposite the first wall portion for allowing the first component to enter the interior of the housing; wherein the first component has a first clamping surface, at least a portion of the first component is accommodated within the housing, and the first clamping surface abuts against the inner surface of the first wall portion to form a positioning fit between the first component and the housing. During testing, the first component can be inserted into the housing and form a positioning fit with the housing, allowing the first component to reach a designated position on the first wall portion more quickly, thereby enabling the first component to accurately press against the first wall portion.

[0024] In some embodiments, the second component has a retaining cavity having a fourth opening for the housing to enter the retaining cavity; the housing is at least partially accommodated in the retaining cavity, and the wall surface of the retaining cavity opposite the fourth opening abuts against the outer surface of the first wall portion, thereby forming a positioning fit between the second component and the housing. During testing, the housing can form a positioning fit with the retaining cavity, allowing the housing to more quickly reach the designated position of the second component, achieving rapid docking between the housing and the second component, and enabling the second component and the first component to quickly and accurately clamp the first wall portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0026] FIG1 is an exploded view of a battery cell provided in some embodiments of the present application;

[0027] FIG2 is an exploded view of a pressure-resistant burst test tool provided in some embodiments of the present application;

[0028] FIG3 is a schematic structural diagram of the pressure-resistant burst test fixture shown in FIG2 ;

[0029] FIG4 is a partial enlarged view of point A in FIG3 ;

[0030] FIG5 is a schematic structural diagram of the first component shown in FIG3 ;

[0031] FIG6 is a diagram illustrating the positional relationship between a first sealing member and a first wall portion provided in some embodiments of the present application;

[0032] FIG7 is a diagram showing the positional relationship between the first sealing member and the first wall portion provided in some other embodiments of the present application;

[0033] FIG8 is a diagram showing the positional relationship between the first sealing member and the first wall portion provided in some other embodiments of the present application;

[0034] FIG9 is a diagram showing the positional relationship between the first sealing member and the first wall portion provided in some further embodiments of the present application;

[0035] FIG10 is a schematic structural diagram of the second component shown in FIG3 ;

[0036] FIG11 is an exploded view of a pressure-resistant burst test tool provided in some other embodiments of the present application;

[0037] FIG12 is a schematic structural diagram of the pressure-resistant burst test fixture shown in FIG11 ;

[0038] FIG13 is a partial enlarged view of point B in FIG12;

[0039] FIG14 is a schematic structural diagram of the second component shown in FIG12;

[0040] FIG15 is an axonometric view of a pressure-resistant burst test fixture provided in some embodiments of the present application;

[0041] FIG16 is an exploded view of a pressure burst test system provided by some embodiments of the present application;

[0042] FIG17 is an assembly diagram of the pressure-resistant burst test system shown in FIG16 ;

[0043] FIG18 is an axonometric view of the housing shown in FIG17 ;

[0044] FIG19 is a schematic structural diagram of the housing shown in FIG18 .

[0045] Icons: 1-first component; 11-entry channel; 111-first avoidance chamber; 1111-first opening; 1112-first chamber wall; 112-first channel; 1121-first entrance; 12-first clamping surface; 121-first limiting groove; 2-second component; 21-discharge channel; 211-second avoidance chamber; 2111-second opening; 2112-second chamber wall; 212-second channel; 2121-second discharge outlet; 22-second clamping surface; 221-second limiting groove; 23-base; 24-limiting portion; 241-inner side; 25-limiting chamber; 251-fourth opening; 3-first sealing member; 4- Second sealing member; 5-driving mechanism; 51-fixing member; 511-first connecting seat; 512-second connecting seat; 513-guiding member; 52-movable member; 53-driving member; 10-pressure bursting test fixture; 20-battery cell; 201-shell; 2011-shell; 2012-end cover; 202-pressure relief component; 2021-first wall; 20211-inner surface of the first wall; 20212-outer surface of the first wall; 2022-pressure relief mechanism; 2023-side wall; 20231-third opening; 203-electrode assembly; 204-electrode terminal; 100-pressure bursting test system; X-first direction. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0048] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0050] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0051] The term "plurality" used in this application refers to two or more (including two).

[0052] In battery technology, in order to improve the reliability of battery cells, a pressure relief component may be provided in the battery cells so that pressure can be relieved through the pressure relief component when the battery cells experience thermal runaway.

[0053] In a battery cell, it is generally necessary to perform a pressure-resistant burst test on the pressure relief component to obtain the bursting pressure of the pressure relief component. At present, the pressure-resistant burst test is generally performed after the battery cell is assembled. That is, by drilling a hole in the pressure relief component, connecting an external pipe, and introducing gas into the battery cell through the pipe until the pressure relief mechanism of the pressure relief component is actuated, and the bursting pressure of the pressure relief component is obtained by measuring the peak pressure inside the battery cell. This test method is complicated to operate, and the welding strength of the shell and the end cover will affect the test quality. If the welding strength of the shell and the end cover is insufficient, it is difficult to obtain the accurate bursting pressure of the pressure relief component. Therefore, the quality of the pressure-resistant burst test of the pressure relief component is currently poor, and it is difficult to accurately obtain the bursting pressure of the pressure relief component.

[0054] To address the problem of poor quality in pressure-resistant burst tests of pressure relief components, an embodiment of the present application provides a pressure-resistant burst test fixture, comprising a first component and a second component. The first component is provided with an inlet channel, and the second component is provided with an outlet channel. The second component and the first component cooperate to clamp the first wall portion of the pressure relief component, and the outlet channel is used to discharge the fluid medium flowing from the inlet channel through the first wall portion when the pressure relief mechanism of the first wall portion is actuated. The pressure-resistant burst test fixture of this structure is simple. When performing a burst test on the pressure relief component, the first component and the second component can directly act on both sides of the first wall portion of the pressure relief component, which can simplify the testing process and improve the quality of the pressure-resistant burst test of the pressure relief component.

[0055] The pressure-resistant burst test fixture described in the embodiments of the present application can be used to test the burst pressure of the pressure relief component of a battery cell.

[0056] Among them, the battery cells can be cylindrical battery cells, prismatic battery cells, soft-pack battery cells or battery cells of other shapes. The prismatic battery cells can be triangular prism battery cells, quadrangular prism battery cells, pentagonal prism battery cells, hexagonal prism battery cells, etc. The quadrangular prism battery cells can be square shell battery cells, blade-shaped battery cells, etc.

[0057] Please refer to FIG. 1 , which is an exploded view of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 may include a housing 201 and an electrode assembly 203 , wherein the electrode assembly 203 is accommodated in the housing 201 .

[0058] The housing 201 may include a shell 2011 and an end cover 2012 . The shell 2011 has an opening, and the end cover 2012 closes the opening of the shell 2011 .

[0059] The housing 2011 is a component for accommodating the electrode assembly 203. The housing 2011 can be a hollow structure with an opening at one end, or a hollow structure with openings at two opposite ends. The housing 2011 can have various shapes, such as a cylinder or a rectangular parallelepiped. The housing 2011 can be made of various materials, such as copper, iron, aluminum, steel, and aluminum alloys.

[0060] The end cap 2012 is a component that seals the opening of the housing 2011 to isolate the internal environment of the battery cell 20 from the external environment. The end cap 2012 and the housing 2011 together define a storage space for accommodating the electrode assembly 203, electrolyte, and other components. The end cap 2012 can be connected to the housing 2011 by welding or crimping to seal the opening of the housing 2011. The shape of the end cap 2012 can be compatible with the shape of the housing 201. For example, if the housing 2011 is a rectangular parallelepiped structure, the end cap 2012 can be a rectangular plate structure that matches the housing 2011. For another example, if the housing 2011 is cylindrical, the end cap 2012 can be a circular plate structure that matches the housing 2011. The end cap 2012 can also be made of a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, plastic, etc. The end cap 2012 and the housing 2011 can be made of the same or different materials.

[0061] In an embodiment where the housing 2011 is open at one end, one end cap 2012 may be provided. In an embodiment where the housing 2011 is open at two opposite ends, two end caps 2012 may be provided, each of which closes the two openings of the housing 2011, and the two end caps 2012 and the housing 2011 together define a receiving space.

[0062] The battery cell 20 may also include an electrode terminal 204, which is disposed on the outer casing 201. The electrode terminal 204 is used to electrically connect to the tabs of the electrode assembly 203 to input or output electrical energy from the battery cell 20. The electrode terminal 204 may be disposed on the housing 2011 of the outer casing 201 or on the end cap 2012 of the outer casing 201. The electrode terminal 204 may be directly connected to the tab, for example, by welding the electrode terminal 204 to the tab. The electrode terminal 204 may also be indirectly connected to the tab, for example, by a current collecting member. The current collecting member may be a metal conductor, such as copper, iron, aluminum, steel, or an aluminum alloy.

[0063] In the battery cell 20 , the pressure relief component 202 may be the end cover 2012 , the housing 2011 , or a component mounted on the end cover 2012 or the housing 2011 .

[0064] In some embodiments, the pressure relief component 202 may include a first wall portion 2021 provided with a pressure relief mechanism 2022 configured to be actuated when the internal pressure of the battery cell 20 reaches a threshold value to relieve the pressure inside the battery cell 20 .

[0065] The first wall portion 2021 may be a plate-like structure. In an embodiment where the end cap 2012 serves as the pressure relief component 202, the end cap 2012 may serve as the first wall portion 2021. In an embodiment where the housing 2011 serves as the pressure relief component 202, any wall portion of the housing 2011 may serve as the first wall portion 2021. For example, if the housing 2011 is a hollow structure with an opening at one end, the wall portion of the housing 2011 opposite the opening may serve as the first wall portion 2021. In an embodiment where the pressure relief component 202 is mounted on the end cap 2012 or the housing 2011, the pressure relief component 202 may serve as the first wall portion 2021.

[0066] The pressure relief mechanism 2022 may be a weak portion of the first wall portion 2021. The pressure relief groove may be provided on the first wall portion 2021 to form a corresponding weak portion, thereby forming the pressure relief mechanism 2022. The pressure relief groove may be a groove extending along a closed trajectory, such as an annular groove; or a groove extending along a non-closed trajectory, such as a linear groove, an H-shaped groove, a U-shaped groove, a Y-shaped groove, or an arc-shaped groove.

[0067] In the present embodiment, "activation" means that the pressure relief mechanism 2022 is activated or brought to a certain state, thereby releasing the internal pressure of the battery cell 20. The action of the pressure relief mechanism 2022 may include, but is not limited to, rupturing, breaking, or tearing at least a portion of the pressure relief mechanism 2022.

[0068] The specific structure of the pressure-resistant burst testing tool 10 is described in detail below with reference to the accompanying drawings.

[0069] Please refer to Figures 2 and 3. Figure 2 is an exploded view of a pressure-resistant bursting test jig 10 provided in some embodiments of the present application; Figure 3 is a structural schematic diagram of the pressure-resistant bursting test jig 10 shown in Figure 2. The embodiment of the present application provides a pressure-resistant bursting test jig 10 for testing the bursting pressure of a pressure relief component 202. The pressure relief component 202 includes a first wall portion 2021 provided with a pressure relief mechanism 2022. The pressure-resistant bursting test jig 10 includes a first component 1 and a second component 2. The first component 1 is provided with an inlet channel 11, and the second component 2 is provided with an outlet channel 21. The second component 2 and the first component 1 are used to cooperate to clamp the first wall portion 2021. The outlet channel 21 is used to discharge the fluid medium flowing from the inlet channel 11 through the first wall portion 2021 when the pressure relief mechanism 2022 is actuated.

[0070] The first component 1 and the second component 2 are two components of the pressure-resistant burst test fixture 10 that can be brought closer to each other, so that the second component 2 and the first component 1 cooperate to clamp the first wall portion 2021. The first component 1 and the second component 2 can be two independent components, with the first component 1 and the second component 2 positioned opposite each other. When the second component 2 and the first component 1 clamp the first wall portion 2021, the second component 2 can be stationary while the first component 1 moves toward the second component 2, the first component 1 can be stationary while the second component 2 moves toward the first component 1, or both the first component 1 and the second component 2 can move toward each other.

[0071] The first component 1 and the second component 2 can be plate-shaped, elongated, or block-shaped. The clamping force of the first component 1 and the second component 2 on the first wall 2021 can be provided manually or by a power component. When the first component 1 and the second component 2 clamp the first wall 2021, the first component 1 and the first wall 2021 can be in a sealed state, which can be achieved by direct contact between the first component 1 and the first wall 2021 or by providing a sealing member between the first component 1 and the first wall 2021. The second component 2 and the first wall 2021 can also be in a sealed state, which can be achieved by direct contact between the second component 2 and the first wall 2021 or by providing a sealing member between the second component 2 and the first wall 2021.

[0072] The inlet channel 11 may be a hole formed in the first component 1, and the outlet channel 21 may be a hole or a groove formed in the second component 2. The fluid medium may be gas, liquid, or the like.

[0073] As an example, the inlet channel 11 has a first inlet 1121 and a first outlet formed at both ends, respectively. The first inlet 1121 is formed on the outer surface of the first component 1. The outlet channel 21 has a second inlet 2121 and a second outlet 2121 formed on the outer surface of the second component 2. When the first and second components 1 and 2 are clamped by a wall, the first outlet faces toward and is blocked by the first wall 2021, while the second inlet faces toward and is blocked by the first wall 2021. The first outlet and the second inlet are separated by the first wall 2021, separating the inlet channel 11 and the outlet channel 21 from each other. When the pressure relief mechanism 2022 is activated, a corresponding hole is formed in the first wall 2021, connecting the inlet channel 11 and the outlet channel 21 through the hole in the first wall 2021.

[0074] In the embodiment of the present application, the first wall portion 2021 is fixed by the cooperation of the first component 1 and the second component 2. After the fluid medium is injected into the inlet channel 11 of the first component 1, the pressure in the inlet channel 11 gradually increases until the pressure in the inlet channel 11 reaches the bursting pressure of the pressure relief component 202, causing the pressure relief mechanism 2022 to be actuated. The fluid medium in the inlet channel 11 will flow through the first wall portion 2021 and be discharged through the discharge channel 21 of the second component 2. During this process, the peak pressure in the inlet channel 11 is the bursting pressure of the pressure relief component 202. The pressure-resistant burst test fixture 10 of this structure is simple in structure. When performing a burst test on the pressure relief component 202, the first component 1 and the second component 2 can directly act on both sides of the first wall portion 2021 of the pressure relief component 202, which can simplify the test process and improve the quality of the pressure-resistant burst test of the pressure relief component 202.

[0075] During the test, a fluid medium supply device can be connected to the first inlet port 1121 to supply fluid medium into the inlet channel 11. The fluid medium supply device can be a gas supply device to supply gas to the inlet channel 11. Of course, the gas supply device can be a device with a pressure measurement function, and the peak air pressure in the inlet channel 11 during the test can be measured by the gas supply device to obtain the bursting pressure of the pressure relief component 202. Alternatively, a pressure sensor can be provided in the inlet channel 11 to measure the peak air pressure in the inlet channel 11 during the test to obtain the bursting pressure of the pressure relief component 202.

[0076] In some embodiments, please refer to Figures 4 and 5. Figure 4 is a partial enlarged view of point A in Figure 3; Figure 5 is a schematic structural diagram of the first component 1 shown in Figure 3. The first component 1 has a first clamping surface 12, which is configured to abut against the first wall portion 2021. The inlet channel 11 includes a first avoidance cavity 111, which forms a first opening 1111 on the first clamping surface 12. The first avoidance cavity 111 is configured to avoid the pressure relief mechanism 2022.

[0077] The first clamping surface 12 is the surface of the first component 1 facing the second component 2, and is used to abut against the first wall portion 2021. The first clamping surface 12 can be a flat surface or a curved surface. The first clamping surface 12 can be the end surface of the first component 1 that is close to the second component 2. When the first component 1 and the second component 2 clamp the first wall portion 2021, the first clamping surface 12 can directly abut against the first wall portion 2021, that is, the first clamping surface 12 is in direct contact with the first wall portion 2021. The first clamping surface 12 can also indirectly abut against the first wall portion 2021, for example, through a sealing member.

[0078] A portion of the entry channel 11 may serve as the first avoidance chamber 111, or the entire entry channel 11 may serve as the first avoidance chamber 111. The first avoidance chamber 111 may have various shapes, such as cylindrical, prismatic, etc. The first opening 1111 may also have various shapes, for example, the first opening 1111 may be circular, polygonal, etc. The first opening 1111 may serve as the first outlet for the entry channel 11. When the first component 1 and the second component 2 clamp the first wall portion 2021, the projection of the pressure relief mechanism 2022 along the thickness direction of the first wall portion 2021 may be located within the first avoidance chamber 111, so as to realize the avoidance function of the first avoidance chamber 111 for the pressure relief mechanism 2022.

[0079] In this embodiment, the provision of the first avoidance chamber 111 can reduce the influence of the first component 1 on the strength of the pressure relief mechanism 2022 when squeezing the first wall portion 2021, thereby reducing the risk of premature actuation of the pressure relief mechanism 2022 during the test, resulting in inaccurate bursting pressure of the tested pressure relief component 202.

[0080] In some embodiments, please continue to refer to Figures 4 and 5. The pressure-resistant burst test fixture 10 also includes a first seal 3. The first seal 3 is provided on the first component 1. The first seal 3 is used to seal the gap between the first clamping surface 12 and the first wall portion 2021.

[0081] The first seal 3 can be an annular sealing ring, or it can include multiple separately disposed sealing segments arranged circumferentially along the first opening 1111. The first seal 3 can at least partially protrude from the first clamping surface 12. The first seal 3 can be disposed on the first clamping surface 12 of the first component 1, such that the entire first seal 3 protrudes from the first clamping surface 12; or a portion of the first seal 3 can be embedded within the first component 1, such that a portion of the first seal 3 protrudes from the first clamping surface 12. The first seal 3 can be made of a variety of materials, such as rubber, plastic, or other materials.

[0082] During the test, when the first component 1 and the second component 2 clamp the first wall portion 2021, if the first seal 3 completely protrudes from the first clamping surface 12, the first seal 3 may be completely located between the first clamping surface 12 and the first wall portion 2021, so that the first clamping surface 12 does not contact the first wall portion 2021; if a portion of the first seal 3 is embedded in the first component 1, only a portion of the first seal 3 may be located between the first clamping surface 12 and the first wall portion 2021, so that the first clamping surface 12 does not contact the first wall portion 2021, or the first seal 3 may be deformed after being subjected to the pressure of the first wall portion 2021, so that the first seal 3 is completely embedded in the first component 1, so that the first clamping surface 12 contacts the first wall portion 2021.

[0083] In this embodiment, the provision of the first seal 3 can improve the sealing performance between the first component 1 and the first wall portion 2021, reduce the risk of the fluid medium entering the channel 11 leaking through the gap between the first clamping surface 12 and the first wall portion 2021 during the test process, and further improve the pressure-resistant burst test quality of the pressure relief component 202.

[0084] In some embodiments, please refer to Figures 6 to 10. Figure 6 is a positional relationship diagram of the first seal 3 and the first wall portion 2021 provided in some embodiments of the present application; Figure 7 is a positional relationship diagram of the first seal 3 and the first wall portion 2021 provided in other embodiments of the present application; Figure 8 is a positional relationship diagram of the first seal 3 and the first wall portion 2021 provided in still other embodiments of the present application; Figure 9 is a positional relationship diagram of the first seal 3 and the first wall portion 2021 provided in still other embodiments of the present application; Figure 10 is an exploded view of the pressure-resistant burst test fixture 10 provided in still other embodiments of the present application. The first seal 3 is an annular structure, and the first seal 3 is arranged around the first opening 1111 (shown in Figure 5).

[0085] The first sealing member 3 is a sealing ring, and the first sealing member 3 surrounds the outside of the first opening 1111 , that is, the first opening 1111 is located on the inner side of the first sealing member 3 .

[0086] The first sealing member 3 extends along a closed track to form an annular structure. The closed track may be circular, rectangular, or the like.

[0087] As an example, the first seal 3 includes multiple integrally formed first sealing segments, which are connected end-to-end to form an annular structure. At least one of the first sealing segments can extend along a straight path; at least one of the first sealing segments can also extend along a non-linear path, for example, along an arcuate path.

[0088] In the embodiment shown in FIG6 , the first wall portion 2021 is provided with a pressure relief groove to form a corresponding pressure relief mechanism 2022. The pressure relief groove is H-shaped. The first sealing member 3 includes four first sealing segments, two of which are linear grooves arranged in parallel, and the other two are arcuate grooves arranged opposite each other, connecting the two linear grooves and being tangent to them.

[0089] In the embodiment shown in Figure 7, the first wall portion 2021 is provided with a pressure relief groove to form a corresponding pressure relief mechanism 2022. The pressure relief groove is H-shaped. The first sealing member 3 includes four first sealing segments, each of which is a linear groove. The four linear grooves are connected end to end to form a rectangular ring.

[0090] In the embodiment shown in Figure 8 , the first wall portion 2021 is provided with a pressure relief groove to form a corresponding pressure relief mechanism 2022. The pressure relief groove extends along a closed trajectory, i.e., it is an annular groove. The first seal 3 comprises four first sealing segments. Two of these first sealing segments are linear grooves, arranged parallel to each other, while the other two first sealing segments are arcuate grooves, arranged opposite each other, connecting the two linear grooves and being tangential to them.

[0091] In the embodiment shown in Figure 9, the first wall portion 2021 is provided with a pressure relief groove to form a corresponding pressure relief mechanism 2022. The pressure relief groove extends along a closed trajectory, i.e., it is an annular groove. The first sealing member 3 includes four first sealing segments, each of which is a linear groove. The four linear grooves are connected end to end to form a rectangular ring.

[0092] In this embodiment, the annular first sealing member 3 has a simple structure, is easy to form, has good economy, and can well achieve sealing between the first component 1 and the first wall portion 2021 .

[0093] In some embodiments, please continue to refer to FIG. 4 and FIG. 5 , the first clamping surface 12 is provided with a first limiting groove 121 , and at least a portion of the first sealing member 3 is accommodated in the first limiting groove 121 .

[0094] The first limiting groove 121 is recessed from the first clamping surface 12 in a direction away from the second component 2. The first sealing member 3 can be completely accommodated in the first limiting groove 121, or only partially accommodated in the first limiting groove 121. The first sealing member 3 and the first limiting groove 121 can form a clearance fit, a transition fit, or an interference fit.

[0095] As an example, the first limiting groove 121 is an annular groove. Along the depth direction of the first limiting groove 121 , the first sealing component 3 is only partially accommodated in the first limiting groove 121 , and the first sealing component 3 forms an interference fit with the first limiting groove 121 .

[0096] In this embodiment, the first limiting groove 121 limits the first sealing member 3 , thereby reducing the difficulty of installing the first sealing member 3 .

[0097] In some embodiments, please continue to refer to Figure 5, the entry channel 11 can also include a first channel 112, one end of the first channel 112 extends to the cavity wall of the first avoidance cavity 111 opposite to the first opening 1111, and the other end of the first channel 112 extends to the outer surface of the first component 1.

[0098] A cavity wall surface of the first avoidance cavity 111 opposite to the first opening 1111 is a first cavity wall surface 1112 . One end of the first channel 112 extends to the first cavity wall surface 1112 , so that the first channel 112 is in communication with the first avoidance cavity 111 .

[0099] The cross-section of the first channel 112 can be circular, polygonal, etc., and the cross-section of the first avoidance cavity 111 can be circular, polygonal, etc. The first channel 112 can extend along a straight path or a non-straight path. In the embodiment shown in FIG5 , the first channel 112 is generally L-shaped.

[0100] The other end of the first channel 112 may form a first inlet 1121 on the outer surface of the first component 1 . During testing, the fluid medium may enter the first channel 112 from the first inlet 1121 and then enter the first avoidance cavity 111 through the first channel 112 .

[0101] In this embodiment, the cross section of the first channel 112 can be made smaller than the cross section of the first avoidance cavity 111, which is beneficial to improving the strength of the first component 1 on the one hand, and facilitating the connection between the entry channel 11 and the fluid medium providing device on the other hand.

[0102] In some embodiments, referring to Figures 4 and 10 , Figure 10 is a schematic diagram of the structure of the second component 2 shown in Figure 3 . The second component 2 has a second clamping surface 22, which is configured to abut against the first wall portion 2021. The discharge channel 21 includes a second avoidance cavity 211, which forms a second opening 2111 on the second clamping surface 22. The second avoidance cavity 211 is configured to avoid the pressure relief mechanism 2022.

[0103] The second clamping surface 22 is the surface of the second component 2 facing the first component 1, which is used to abut against the first wall portion 2021. The second clamping surface 22 can be a flat surface or a curved surface. When the first component 1 and the second component 2 clamp the first wall portion 2021, the second clamping surface 22 can directly abut against the first wall portion 2021, that is, the second clamping surface 22 is in direct contact with the first wall portion 2021. The second clamping surface 22 can also abut against the first wall portion 2021 indirectly, for example, through a seal. As an example, in the embodiment shown in Figure 10, the second clamping surface 22 is the end surface of the second component 2 that is closest to the first component 1.

[0104] A portion of the discharge channel 21 may serve as the second avoidance chamber 211, or the entire discharge channel 21 may serve as the second avoidance chamber 211. The second avoidance chamber 211 may have various shapes, such as cylindrical, prismatic, etc. The second opening 2111 may also have various shapes, for example, the second opening 2111 may be circular, polygonal, etc. The second opening 2111 may serve as a second entrance to the discharge channel 21. When the first component 1 and the second component 2 clamp the first wall portion 2021, the projection of the pressure relief mechanism 2022 along the thickness direction of the first wall portion 2021 may be located within the second avoidance chamber 211, so as to realize the avoidance function of the second avoidance chamber 211 for the pressure relief mechanism 2022.

[0105] In this embodiment, the provision of the second avoidance cavity 211 can reduce the impact of the second component 2 squeezing the first wall portion 2021 on the strength of the pressure relief mechanism 2022, thereby reducing the risk of premature activation of the pressure relief mechanism 2022 during testing, which could lead to inaccurate measured burst pressures of the pressure relief component 202. Furthermore, after the pressure relief mechanism 2022 is activated, a portion of the first wall portion 2021 may flip over, and the first avoidance cavity 111 can avoid the outwardly flipped portion of the first wall portion 2021, thereby increasing the pressure relief area of ​​the first wall portion 2021 and improving the accuracy of the measured burst pressures of the pressure relief component 202.

[0106] In some embodiments, please continue to refer to Figures 4 and 10. The pressure-resistant burst test fixture 10 also includes a second seal 4. The second seal 4 is provided on the second component 2. The second seal 4 is used to seal the gap between the second clamping surface 22 and the first wall portion 2021.

[0107] The second sealing member 4 can be an annular sealing ring or comprise multiple, separately disposed sealing segments arranged circumferentially along the second opening 2111. The second sealing member 4 can at least partially protrude from the second clamping surface 22. The second sealing member 4 can be disposed on the second clamping surface 22 of the second component 2, such that the entire second sealing member 4 protrudes from the second clamping surface 22. Alternatively, a portion of the second sealing member 4 can be embedded within the second component 2, such that a portion of the second sealing member 4 protrudes from the second clamping surface 22. The second sealing member 4 can be made of a variety of materials, such as rubber, plastic, or other materials.

[0108] During the test, when the first component 1 and the second component 2 clamp the first wall portion 2021, if the second seal 4 completely protrudes from the second clamping surface 22, the second seal 4 may be completely located between the second clamping surface 22 and the first wall portion 2021, so that the second clamping surface 22 does not contact the first wall portion 2021; if a portion of the second seal 4 is embedded in the second component 2, only a portion of the second seal 4 may be located between the second clamping surface 22 and the first wall portion 2021, so that the second clamping surface 22 does not contact the first wall portion 2021, or the second seal 4 may be deformed after being subjected to the pressure of the first wall portion 2021, so that the second seal 4 is completely embedded in the second component 2, so that the second clamping surface 22 contacts the first wall portion 2021.

[0109] In this embodiment, the provision of the second sealing member 4 can improve the sealing performance between the second component 2 and the first wall portion 2021 , and reduce the risk of fluid medium leaking through the gap between the second clamping surface 22 and the first wall portion 2021 during testing.

[0110] In some embodiments, the second sealing member 4 is an annular structure, and the second sealing member 4 is disposed around the second opening 2111 .

[0111] The second sealing member 4 is a sealing ring, and the second sealing member 4 surrounds the outside of the second opening 2111 , that is, the second opening 2111 is located on the inner side of the second sealing member 4 .

[0112] The second sealing member 4 extends along a closed track to form an annular structure. The closed track may be circular, rectangular, or the like.

[0113] As an example, the second seal 4 includes a plurality of integrally formed second sealing segments, which are connected end-to-end to form an annular structure. At least one of the second sealing segments may extend along a straight path; at least one of the second sealing segments may also extend along a non-straight path, for example, along an arcuate path.

[0114] In this embodiment, the annular second sealing member 4 has a simple structure and can well achieve sealing between the second component 2 and the first wall portion 2021 .

[0115] In some embodiments, please continue to refer to FIG. 4 and FIG. 10 , the second clamping surface 22 is provided with a second limiting groove 221 , and at least a portion of the second sealing member 4 is accommodated in the second limiting groove 221 .

[0116] The second limiting groove 221 is recessed from the second clamping surface 22 in a direction away from the first component 1. The second sealing member 4 can be completely accommodated in the second limiting groove 221, or only partially accommodated in the second limiting groove 221. The second sealing member 4 and the second limiting groove 221 can form a clearance fit, a transition fit, or an interference fit.

[0117] As an example, the second limiting groove 221 is an annular groove. Along the depth direction of the second limiting groove 221 , the second sealing member 4 is only partially accommodated in the second limiting groove 221 , and the second sealing member 4 forms an interference fit with the second limiting groove 221 .

[0118] In this embodiment, the second limiting groove 221 limits the second sealing member 4 , thereby reducing the difficulty of installing the second sealing member 4 .

[0119] In some embodiments, please continue to refer to Figure 10, the exhaust channel 21 can also include a second channel 212, one end of the second channel 212 extends to the cavity wall of the second avoidance cavity 211 opposite to the second opening 2111, and the other end of the second channel 212 extends to the outer surface of the second component 2.

[0120] A cavity wall surface of the second avoidance cavity 211 opposite to the second opening 2111 is a second cavity wall surface 2112 . One end of the second channel 212 extends to the second cavity wall surface 2112 , so that the second channel 212 is in communication with the second avoidance cavity 211 .

[0121] The cross-section of the second channel 212 can be circular, polygonal, etc., and the cross-section of the second avoidance cavity 211 can be circular, polygonal, etc. The second channel 212 can extend along a straight path or a non-straight path. In the embodiment shown in Figure 10, the second channel 212 is generally L-shaped.

[0122] The other end of the second channel 212 may form a second outlet 2121 on the outer surface of the second component 2 . During testing, the fluid medium entering the second channel 212 may be discharged to the outside through the second outlet 2121 .

[0123] In this embodiment, the cross section of the second channel 212 can be made smaller than the cross section of the second avoidance cavity 211 , which is beneficial to improving the strength of the second component 2 .

[0124] In some embodiments, please refer to Figures 11 to 14. Figure 11 is an exploded view of a pressure-resistant burst test fixture 10 provided in other embodiments of the present application; Figure 12 is a schematic structural diagram of the pressure-resistant burst test fixture 10 shown in Figure 11; Figure 13 is a partial enlarged view of point B in Figure 12; and Figure 14 is a schematic structural diagram of the second component 2 shown in Figure 12. The second component 2 includes a base 23 and a limiting portion 24. The base 23 has a second clamping surface 22, which is used to abut against the first wall portion 2021. The discharge channel 21 is formed in the base 23, and the discharge channel 21 forms a second opening 2111 on the second clamping surface 22. The limiting portion 24 is connected to the base 23, and the limiting portion 24 has an inner side surface 241. The inner side surface 241 is connected to the second clamping surface 22. The inner side surface 241 and the second clamping surface 22 jointly define a limiting cavity 25. The limiting cavity 25 is used to accommodate at least a portion of the pressure relief component 202 so that the second component 2 and the pressure relief component 202 form a positioning fit.

[0125] The base 23 and the limiting portion 24 can be integrally formed; they can also be provided as separate parts and connected, for example, by welding. The second clamping surface 22 is the surface of the base 23 facing the second component 2 for contact with the first wall 2021. The second clamping surface 22 can be the surface of the base 23 closest to the first component 1. The second clamping surface 22 can be a flat surface or a curved surface.

[0126] The second opening 2111 is located at the end of the discharge channel 21 and can serve as a second entrance to the discharge channel 21. The limiting cavity 25 is connected to the discharge channel 21 through the second opening 2111. In the embodiment where the discharge channel 21 includes the second avoidance cavity 211, the second avoidance cavity 211 forms a second opening 2111 on the second clamping surface 22.

[0127] The limiting portion 24 protrudes from the second clamping surface 22. The cross-section of the limiting portion 24 can be an annular structure, such as a circular ring or a rectangular ring. If the cross-section of the limiting portion 24 is a circular ring structure, the inner side surface 241 of the limiting portion 24 can be cylindrical, and the limiting cavity 25 can be cylindrical; if the cross-section of the limiting portion 24 is a rectangular ring structure, the inner side surface 241 of the limiting portion 24 can be rectangular, and the limiting cavity 25 can be rectangular. The second clamping surface 22 of the base 23 and the inner side surface 241 of the limiting portion 24 are both cavity walls of the limiting cavity 25, wherein the second clamping surface 22 is the cavity wall of the limiting cavity 25 opposite to the opening of the limiting cavity 25, and the opening of the limiting cavity 25 is the fourth opening 251.

[0128] It should be noted that in an embodiment in which the second component 2 and the first wall portion 2021 are sealed by a second sealing member 4, a second limiting groove 221 can be provided on the second clamping surface 22 of the base 23 to accommodate the second sealing member 4 to position the second sealing member 4.

[0129] In this embodiment, the base 23 and the limiting portion 24 jointly form a limiting cavity 25. During the test, the pressure relief component 202 can form a positioning fit with the limiting cavity 25, so that the pressure relief component 202 can reach the specified position of the second component 2 more quickly, thereby realizing rapid docking of the pressure relief component 202 with the second component 2, and enabling the second component 2 to accurately press against the first wall portion 2021.

[0130] In some embodiments, referring to FIG. 15 , which is an isometric view of a pressure-resistant burst test fixture 10 provided in some embodiments of the present application, the pressure-resistant burst test fixture 10 may further include a drive mechanism 5 configured to drive the first component 1 and the second component 2 toward each other so that the first component 1 and the second component 2 cooperate to clamp the first wall portion 2021 .

[0131] The driving mechanism 5 is a mechanism that drives the first component 1 and the second component 2 toward each other. The driving mechanism 5 may only drive the second component 2 to move, thereby bringing the first component 1 and the second component 2 toward each other; the driving mechanism 5 may only drive the first component 1 to move, thereby bringing the first component 1 and the second component 2 toward each other; or the driving mechanism 5 may be both movable components, and the driving mechanism 5 drives the first component 1 and the second component 2 to move simultaneously in opposite directions, thereby bringing the first component 1 and the second component 2 toward each other.

[0132] The drive mechanism 5 can have various structures, and a motor, pneumatic cylinder, or hydraulic cylinder can be used as the power source in the drive mechanism 5. For example, taking the first component 1 as a fixed component, the second component 2 as a movable component, and the motor as the power source in the drive mechanism 5, the motor can drive the second component 2 to move via a screw-nut transmission structure, so that the first component 1 and the second component 2 approach each other to clamp the first wall portion 2021.

[0133] In this embodiment, the driving mechanism 5 drives the first component 1 and the second component 2 to approach each other, so that the first component 1 and the second component 2 apply a clamping force to the first wall portion 2021 to improve the sealing between the first component 1 and the second component 2 and the pressure relief component 202.

[0134] In some embodiments, the driving mechanism 5 may include a fixed member 51, a movable member 52, and a driving member 53. The fixed member 51 includes a first connecting seat 511. The movable member 52 is movably disposed on the fixed member 51 along a first direction X. Along the first direction X, the movable member 52 is disposed opposite the first connecting seat 511. The first component 1 and the second component 2 are disposed opposite each other and are located between the movable member 52 and the first connecting seat 511. The driving member 53 connects the movable member 52 and the fixed member 51 and is configured to drive the movable member 52 to move along the first direction X so as to move the movable member 52 away from or closer to the first connecting seat 511.

[0135] The driving member 53 is a power source in the driving mechanism 5 . As an example, in the embodiment shown in FIG. 15 , the driving member 53 is a cylinder.

[0136] The movable part 52 can move relative to the fixed part 51 along the first direction X. The movable part 52 can change the distance between the movable part 52 and the first connecting seat 511 relative to the fixed part 51 along the first direction X, and then change the distance between the first component 1 and the second component 2 to achieve clamping of the first wall portion 2021.

[0137] It should be noted that the first component 1 and the second component 2 can be placed only between the movable part 52 and the first connecting seat 511, so that any one of the first component 1 and the second component 2 only maintains contact with any one of the movable part 52 and the first connecting seat 511, and is not connected together. In this way, when the test is completed, the driving member 53 drives the movable part 52 away from the first connecting seat 511, the driving mechanism 5 will not drive the first component 1 and the second component 2 to move; or one of the first component 1 and the second component 2 is connected to the movable part 52, and the other is connected to the first connecting seat 511. In this way, when the test is completed, when the driving member 53 drives the movable part 52 away from the first connecting seat 511, the driving mechanism 5 will drive the first component 1 and the second component 2 away from each other.

[0138] The first direction X can be the direction of gravity, and the movable member 52 can be located below the first connecting seat 511 or above the first connecting seat 511. The first component 1 and the second component 2 are arranged opposite each other along the first direction X and are located between the movable member 52 and the first connecting seat 511. The first component 1 can be in contact with the first connecting seat 511 and the second component 2 can be in contact with the movable member 52, or the first component 1 can be in contact with the movable member 52 and the second component 2 can be in contact with the first connecting seat 511.

[0139] As an example, in the embodiment shown in FIG. 15 , the first connecting seat 511 is located below the movable member 52 , the first component 1 is in contact with the first connecting seat 511 , and the second component 2 is in contact with the movable member 52 .

[0140] In this embodiment, by driving the movable part 52 close to the first connecting seat 511 by the driving part 53, the first component 1 and the second component 2 can apply a clamping force to the first wall portion 2021. By driving the movable part 52 away from the first connecting seat 511 by the driving part 53, the extrusion force applied by the driving mechanism 5 to the first component 1 and the second component 2 can be removed. The driving mechanism 5 has a simple structure and can continuously apply pressure to the first component 1 and the second component 2. The pressure relief component 202 can be easily removed after the test is completed.

[0141] In some embodiments, the fixing member 51 further includes a second connecting seat 512 and a guide member 513. Along the first direction X, the second connecting seat 512 is disposed opposite the first connecting seat 511, the movable member 52 is located between the second connecting seat 512 and the first connecting seat 511, and the driving member 53 connects the second connecting seat 512 and the movable member 52. The guide member 513 extends along the first direction X, connecting the second connecting seat 512 and the first connecting seat 511, and the movable member 52 is slidably connected to the guide member 513.

[0142] The first connecting seat 511 and the second connecting seat 512 are connected by a guide member 513, which can guide the movable member 52. The guide members 513 between the first connecting seat 511 and the second connecting seat 512 can be one, two, three, four, or more. The movable member 52 and the guide member 513 can be slidably connected in various ways. For example, the movable member 52 can be provided with a through hole that cooperates with the guide member 513; or, for example, the guide member 513 can be provided with a slide groove, and the movable member 52 has a slider that cooperates with the slide groove.

[0143] The driving member 53 may be disposed between the second connecting base 512 and the movable member 52 , and connect the second connecting base 512 and the movable member 52 . The number of the driving member 53 may be one, two, three or more.

[0144] As an example, the second connecting seat 512, the first connecting seat 511, and the movable member 52 are all plate-shaped members. The second connecting seat 512 is located above the first connecting seat 511, and the movable seat is located between the second connecting seat 512 and the first connecting seat 511. The guide members 513 are cylindrical, and there are four guide members 513. Through holes are provided at the four corners of the movable member 52, and the four guide members 513 are respectively inserted into the four through holes. Two driving members 53 are provided between the second connecting seat 512 and the movable member 52. The driving members 53 are cylinders. The cylinder body is connected to the second connecting seat 512, and the piston rod of the cylinder is connected to the movable member 52.

[0145] In this embodiment, by setting a guide member 513 between the first connecting seat 511 and the second connecting seat 512 and making the movable member 52 slidably connected to the guide member 513, the stability of the movable member 52 moving along the first direction X can be improved, so as to apply pressure to the first component 1 and the second component 2 more evenly.

[0146] Please refer to Figures 16 and 17. Figure 16 is an exploded view of a pressure-resistant burst test system 100 provided in some embodiments of the present application; Figure 17 is an assembled view of the pressure-resistant burst test system 100 shown in Figure 16. Embodiments of the present application provide a pressure-resistant burst test system 100 comprising a pressure relief component 202 and a pressure-resistant burst test fixture 10 provided in any of the aforementioned embodiments. The pressure relief component 202 includes a first wall portion 2021 provided with a pressure relief mechanism 2022. The second component 2 and the first component 1 cooperate to clamp the first wall portion 2021.

[0147] In this embodiment, the pressure relief component 202 may be the end cover 2012 of the battery cell 20 , or the housing 2011 of the battery cell 20 , or a component mounted on the end cover 2012 or the housing 2011 .

[0148] In some embodiments, FIG18 is an isometric view of the housing 2011 shown in FIG17 , and FIG19 is a schematic structural diagram of the housing 2011 shown in FIG18 . The pressure relief component 202 is a housing 2011, which includes a sidewall 2023 and a first wall portion 2021. The sidewall 2023 is disposed around the first wall portion 2021. The first wall portion 2021 is located at one end of the sidewall 2023. A third opening 20231 is formed at the end of the sidewall 2023 opposite the first wall portion 2021 for allowing the first component 1 to enter the interior of the housing 2011. The first component 1 has a first clamping surface 12 (shown in FIG5 ). At least a portion of the first component 1 (shown in FIG18 and FIG19 ) is accommodated within the housing 2011, and the first clamping surface 12 abuts against the inner surface 20211 of the first wall portion, thereby forming a positioning fit between the first component 1 and the housing 2011.

[0149] The housing 2011 may be cylindrical or prismatic. As an example, in the embodiments shown in FIG18 and FIG17 , the housing 2011 is in the shape of a cuboid, and the side wall 2023 and the first wall portion 2021 are integrally formed.

[0150] One end of the side wall 2023 forming the third opening 20231 is the open end of the housing 2011. When assembling the battery cell 20, the electrode assembly 203 can enter the housing 2011 through the third opening 20231. When performing a pressure burst test on the housing 2011, the first component 1 can enter the housing 2011 through the third opening 20231 to form a fixed fit with the housing 2011. When the first component 1 forms a fixed fit with the housing 2011, the first clamping surface 12 abuts against the inner surface 20211 of the first wall. The first component 1 can be fully or partially contained within the housing 2011.

[0151] The inner surface 20211 of the first wall portion is the surface of the first wall portion 2021 facing the interior of the housing 2011 in the thickness direction. The first clamping surface 12 abuts against the inner surface 20211 of the first wall portion. The first clamping surface 12 and the inner surface 20211 of the first wall portion may abut directly or indirectly.

[0152] The positioning fit formed between the first component 1 and the housing 2011 can be a clearance fit, a transition fit or an interference fit.

[0153] In this embodiment, the pressure relief component 202 is a shell 2011. During the test, the first component 1 can be inserted into the shell 2011 and form a positioning fit with the shell 2011, so that the first component 1 can reach the specified position of the first wall portion 2021 more quickly, so that the first component 1 can accurately press against the first wall portion 2021.

[0154] In some embodiments, the second component 2 has a limiting cavity 25 (shown in FIG. 14 ), which has a fourth opening 251 (shown in FIG. 14 ) for the housing 2011 to enter the limiting cavity 25. The housing 2011 is at least partially accommodated in the limiting cavity 25, and the cavity wall of the limiting cavity 25 opposite the fourth opening 251 abuts against the outer surface 20212 of the first wall portion, thereby forming a positioning fit between the second component 2 and the housing 2011.

[0155] The outer surface 20212 of the first wall portion is the surface of the first wall portion 2021 in the thickness direction facing the outside of the housing 2011. The cavity wall surface of the limiting cavity 25 opposite the fourth opening 251 is the second clamping surface 22 (shown in FIG. 14 ). The second clamping surface 22 may directly abut against the outer surface 20212 of the first wall portion, or may indirectly abut against the outer surface 20212 of the first wall portion.

[0156] The positioning fit formed between the second component 2 and the housing 2011 can be a clearance fit, a transition fit or an interference fit.

[0157] In this embodiment, the second component 2 has a limiting cavity 25. During the test, the shell 2011 can form a positioning fit with the limiting cavity 25, so that the shell 2011 can reach the specified position of the second component 2 more quickly, thereby realizing rapid docking of the shell 2011 and the second component 2, so that the second component 2 and the first component 1 can quickly and accurately clamp the first wall portion 2021.

[0158] Referring to Figures 11-15 , an embodiment of the present application further provides a pressure-resistant burst test fixture 10 for testing the burst pressure of a housing 2011 of a battery cell 20. Housing 2011 has an opening and includes a first wall portion 2021 disposed opposite the opening. First wall portion 2021 is provided with a pressure relief mechanism 2022. Pressure-resistant burst test fixture 10 includes a first component 1, a second component 2, a first seal 3, a second seal 4, and a drive mechanism 5.

[0159] The first component 1 is provided with an inlet channel 11, and the second component 2 is provided with an outlet channel 21. The second component 2 and the first component 1 are used to cooperate to clamp the first wall portion 2021. The outlet channel 21 is used to discharge the fluid medium flowing from the inlet channel 11 through the first wall portion 2021 when the pressure relief mechanism 2022 is actuated.

[0160] The first component 1 is configured to form a positioning fit with the housing 2011 and has a first clamping surface 12 configured to abut against the first wall portion 2021. The inlet passage 11 includes a first escape cavity 111 and a first passage 112. The first escape cavity 111 forms a first opening 1111 on the first clamping surface 12, configured to escape the pressure relief mechanism 2022. One end of the first passage 112 extends to the cavity wall of the first escape cavity 111 opposite the first opening 1111, and the other end of the first passage 112 extends to the outer surface of the first component 1.

[0161] The first seal 3 is disposed on the first component 1 and is used to seal the gap between the first clamping surface 12 and the first wall portion 2021. The first seal 3 is an annular structure and is disposed around the first opening 1111. The first clamping surface 12 is provided with a first limiting groove 121. The first limiting groove 121 is an annular groove, and a portion of the first seal 3 is accommodated in the first limiting groove 121.

[0162] The second component 2 includes a base 23 and a limiting portion 24 . The base 23 has a second clamping surface 22 . The second clamping surface 22 is used to abut against the first wall portion 2021 . The discharge channel 21 is formed in the base 23, and the discharge channel 21 includes a second avoidance cavity 211 and a second channel 212. The second avoidance cavity 211 forms a second opening 2111 on the second clamping surface 22. The second avoidance cavity 211 is used to avoid the pressure relief mechanism 2022. One end of the second channel 212 extends to the cavity wall of the second avoidance cavity 211 opposite to the second opening 2111, and the other end of the second channel 212 extends to the outer surface of the base 23. The limiting portion 24 is connected to the base 23, and the limiting portion 24 has an inner side surface 241. The inner side surface 241 is connected to the second clamping surface 22, and the inner side surface 241 and the second clamping surface 22 jointly define a limiting cavity 25. The limiting cavity 25 is connected to the second avoidance cavity 211, and the limiting cavity 25 is used to accommodate at least a portion of the pressure relief component 202 so that the second component 2 and the pressure relief component 202 form a positioning fit.

[0163] The second sealing member 4 is disposed on the second component 2 and is used to seal the gap between the second clamping surface 22 and the first wall portion 2021. The second sealing member 4 is an annular structure and is disposed around the second opening 2111. The second clamping surface 22 is provided with a second retaining groove 221, which is an annular groove. At least a portion of the second sealing member 4 is accommodated within the second retaining groove 221.

[0164] The driving mechanism 5 includes a fixed member 51, a movable member 52, and a driving member 53. The fixed member 51 includes a first connecting seat 511, a second connecting seat 512, and a guide member 513. The second connecting seat 512 is arranged opposite to the first connecting seat 511 along the first direction X. The movable member 52 is located between the second connecting seat 512 and the first connecting seat 511. The guide member 513 extends along the first direction X and connects the second connecting seat 512 and the first connecting seat 511. The movable member 52 is slidably connected to the guide member 513. The driving member 53 is a cylinder and connects the movable member 52 and the second connecting seat 512. The driving member 53 is configured to drive the movable member 52 to move along the first direction X so as to move the movable member 52 away from or closer to the first connecting seat 511. The first component 1 and the second component 2 are arranged opposite to each other along the first direction X and are located between the movable member 52 and the first connecting seat 511.

[0165] In such a pressure-resistant burst test fixture 10, the provision of the first sealing member 3 improves the sealing between the first component 1 and the housing 2011, and the provision of the second sealing member 4 improves the sealing between the second component 2 and the housing 2011. During testing, the first component 1 can be inserted into the housing 2011 to form a positioning fit with the housing 2011, and the housing 2011 can be inserted into the limiting cavity 25 of the second component 2 to form a positioning fit. The driving member 53 can drive the movable member 52 to move, so that the movable member 52 and the first connecting seat 511 can continuously apply pressure to the first component 1 and the second component 2, thereby causing the first component 1 and the second component 2 to cooperate and clamp the first wall portion 2021 of the housing 2011. During testing, fluid medium can be injected into the inlet channel 11 of the first component 1 until the pressure in the inlet channel 11 reaches the burst pressure of the pressure relief component 202, causing the pressure relief mechanism 2022 to be actuated. The fluid medium in the inlet channel 11 will flow through the first wall portion 2021 and be discharged through the outlet channel 21 of the second component 2. During this process, the peak pressure in the inlet channel 11 is the burst pressure of the pressure relief component 202. This structure of the pressure-resistant burst test fixture 10 is simple in structure, can simplify the testing process, and improve the quality of the pressure-resistant burst test of the housing 211.

[0166] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0167] The above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit this application. Those skilled in the art will appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application are intended to be within the scope of protection of this application.

Claims

1. A pressure-resistant burst test fixture for testing the burst pressure of a pressure relief component, wherein the pressure relief component includes a first wall portion provided with a pressure relief mechanism, and the pressure-resistant burst test fixture comprises: A first component is provided with an entry passage; The second component is provided with a discharge channel. The second component and the first component are used to cooperate to clamp the first wall portion. The discharge channel is used to discharge the fluid medium flowing from the inlet channel through the first wall portion when the pressure relief mechanism is actuated.

2. The pressure burst test tool as claimed in claim 1, wherein: The first component has a first clamping surface, and the first clamping surface is used to abut against the first wall portion; The entry channel includes a first avoidance cavity, the first avoidance cavity forms a first opening on the first clamping surface, and the first avoidance cavity is used to avoid the pressure relief mechanism.

3. The pressure burst test tool as claimed in claim 2, wherein: The pressure-resistant burst test tool also includes: The first sealing member is provided on the first component, and is used for sealing the gap between the first clamping surface and the first wall portion.

4. The pressure burst test tool as claimed in claim 3, wherein: The first sealing member is an annular structure and is disposed around the first opening.

5. The pressure burst test tool according to claim 3 or 4, wherein: The first clamping surface is provided with a first limiting groove, and at least a portion of the first sealing component is accommodated in the first limiting groove.

6. The pressure burst test tool according to any one of claims 2 to 5, wherein: The entry channel further includes a first channel, one end of which extends to a cavity wall surface of the first avoidance cavity opposite to the first opening, and the other end of which extends to an outer surface of the first component.

7. The pressure burst test tool according to any one of claims 1 to 6, wherein: The second component has a second clamping surface, and the second clamping surface is used to abut against the first wall portion; The discharge channel includes a second avoidance cavity, the second avoidance cavity forms a second opening on the second clamping surface, and the second avoidance cavity is used to avoid the pressure relief mechanism.

8. The pressure burst test tool as claimed in claim 7, wherein: The pressure-resistant burst test tool also includes: The second sealing member is provided on the second component, and is used for sealing the gap between the second clamping surface and the first wall portion.

9. The pressure burst test tool as claimed in claim 8, wherein: The second sealing member is an annular structure and is disposed around the second opening.

10. The pressure burst test tool according to claim 8 or 9, wherein: The second clamping surface is provided with a second limiting groove, and at least a portion of the second sealing member is accommodated in the second limiting groove.

11. The pressure burst test tool according to any one of claims 7 to 10, wherein: The discharge channel further includes a second channel, one end of the second channel extends to a cavity wall surface of the second avoidance cavity opposite to the second opening, and the other end of the second channel extends to an outer surface of the second component.

12. The pressure burst test tool according to any one of claims 1 to 11, wherein: The second component includes: a base portion having a second clamping surface, the second clamping surface being configured to abut against the first wall portion, the discharge channel being formed in the base portion, and the discharge channel forming a second opening on the second clamping surface; A limiting portion is connected to the base, and the limiting portion has an inner side surface, which is connected to the second clamping surface. The inner side surface and the second clamping surface jointly define a limiting cavity, and the limiting cavity is used to accommodate at least a portion of the pressure relief component so that the second component and the pressure relief component form a positioning fit.

13. The pressure burst test tool according to any one of claims 1 to 12, wherein: The pressure-resistant burst test tool also includes: The driving mechanism is configured to drive the first component and the second component to approach each other, so that the first component and the second component cooperate to clamp the first wall portion.

14. The pressure burst test tool according to claim 13, wherein: The driving mechanism comprises: The fixing member includes a first connecting seat; a movable member movably disposed on the fixed member along a first direction, wherein the movable member is disposed opposite to the first connecting seat along the first direction, and the first component and the second component are disposed opposite to each other and are located between the movable member and the first connecting seat; A driving member connects the movable member and the fixed member, and is configured to drive the movable member to move along the first direction so as to move the movable member away from or close to the first connecting seat.

15. The pressure burst test tool according to claim 14, wherein: The fixing member further comprises: a second connecting seat, arranged opposite to the first connecting seat along the first direction, the movable member being located between the second connecting seat and the first connecting seat, and the driving member connecting the second connecting seat and the movable member; A guide member extends along the first direction, the guide member connects the second connecting seat and the first connecting seat, and the movable member is slidably connected to the guide member.

16. A pressure burst test system comprising: The pressure relief component includes a first wall portion provided with a pressure relief mechanism; The pressure-resistant burst testing fixture according to any one of claims 1 to 15, wherein the second component and the first component cooperate to clamp the first wall portion.

17. The pressure burst test system according to claim 16, wherein: The pressure relief component is a shell, the shell including a side wall and the first wall portion, the side wall being arranged around the first wall portion, the first wall portion being located at one end of the side wall, and a third opening being formed at an end of the side wall opposite to the first wall portion for allowing the first component to enter the interior of the shell; The first component has a first clamping surface, at least a portion of the first component is accommodated in the shell, and the first clamping surface abuts against the inner surface of the first wall portion, so that the first component and the shell form a positioning fit.

18. The pressure burst test system according to claim 17, wherein: The second component has a limiting cavity, and the limiting cavity has a fourth opening for the shell to enter the limiting cavity; At least a portion of the shell is accommodated in the limiting cavity, and a cavity wall surface of the limiting cavity opposite to the fourth opening abuts against an outer surface of the first wall portion, so that the second component forms a positioning fit with the shell.

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