An explosion-proof valve and battery pack

Abstract

This utility model relates to the field of battery technology, and in particular to an explosion-proof valve and battery pack. The explosion-proof valve includes a valve body, an end cap, a first locking member, a second locking member, and a drive mechanism. The valve body has a pressure relief channel that runs through the valve body in a first direction. The valve body has a pressure relief port and a mounting cavity on both sides in the first direction, respectively. The mounting cavity is arranged at intervals from the pressure relief channel in the second direction. The pressure relief port is connected to the pressure relief channel. The end cap is connected to the valve body and seals the pressure relief port. The first locking member is connected to the side of the end cap facing the pressure relief channel, and at least a portion of the first locking member is located within the pressure relief channel. The drive mechanism is connected to the valve body. The second locking member is connected to the drive mechanism and is locked to the first locking member. The drive mechanism can drive the second locking member to unlock from the first locking member, thereby releasing the end cap, which is beneficial to improving the release of high-pressure fluid in the pressure relief channel. At least a portion of the drive mechanism is disposed in the mounting cavity, making the explosion-proof valve structure more compact.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an explosion-proof valve and a battery pack. Background Technology

[0002] In new energy battery systems, if a lithium battery experiences thermal runaway, it will release a large amount of high-temperature, high-pressure fluid. If this fluid is not released in time, it will rapidly accumulate within the limited space of the battery pack, leading to a surge in internal pressure and potentially causing an explosion. To ensure the rapid discharge of high-pressure fluid and maintain the battery pack's airtightness, an explosion-proof valve is required. Existing explosion-proof valves mostly employ a diaphragm-pin type, relying on the internal pressure of the battery pack to drive the pin and diaphragm closer together, causing the pin to puncture the diaphragm. However, these valves have a small puncture area, a small opening, a limited pressure relief area, and a low pressure relief rate, making efficient pressure relief difficult. Utility Model Content

[0003] The primary objective of this invention is to provide an explosion-proof valve that addresses the problem of low pressure relief rate in existing explosion-proof valves.

[0004] To achieve the above objectives, this utility model provides an explosion-proof valve having a first direction and a second direction that are perpendicular to each other. The explosion-proof valve includes a valve body, an end cap, a first locking element, a second locking element, and a driving mechanism.

[0005] The valve body has a pressure relief channel that extends through the valve body along the first direction; the valve body has a pressure relief port and a mounting cavity on both sides in the first direction, the pressure relief port is connected to the pressure relief channel, and the mounting cavity is arranged at a distance from the pressure relief channel in the second direction;

[0006] The end cap is connected to the valve body and seals the pressure relief port;

[0007] The first locking member is connected to the side of the end cap facing the pressure relief channel, and at least a portion of the first locking member is located within the pressure relief channel;

[0008] The drive mechanism is connected to the valve body, and at least a portion of the drive mechanism is located within the mounting cavity. The second locking member is connected to the drive mechanism and is locked to the first locking member. The drive mechanism is configured to drive the second locking member to unlock from the first locking member, thereby releasing the end cap from sealing the pressure relief port.

[0009] As an optional solution, the explosion-proof valve further includes a first elastic compression member, which is disposed between the valve body and the end cap;

[0010] In the first direction, one end of the first elastic compression member near the valve body abuts against the valve body, and the other end abuts against the end cap.

[0011] As an alternative, in the second direction, the end cap includes a connecting end and a free end disposed opposite to each other, the connecting end being hinged to the valve body, and the first locking member being connected to the free end.

[0012] As an optional solution, the explosion-proof valve further includes a torsion spring, which includes a first torsion arm and a second torsion arm. The first torsion arm is connected to the end cap, and the second torsion arm is connected to the valve body.

[0013] As an alternative, in the first direction, the end of the first locking member away from the end cap has a first locking hole;

[0014] The second locking element is a locking pin, which is inserted into the first lock hole; the driving mechanism is configured to drive the locking pin out of the first lock hole.

[0015] As an optional feature, the explosion-proof valve further includes a reinforcing wall, which is connected to the side of the valve body away from the end cap in the first direction; and in the second direction, the reinforcing wall is located between the mounting cavity and the pressure relief channel; the reinforcing wall has a guide hole extending in the second direction, and the locking pin is slidably inserted in the guide hole.

[0016] Alternatively, the end cap can be detachably connected to the valve body;

[0017] The drive mechanism is configured to drive the second locking member to unlock from the first locking member, thereby disengaging the end cap from the valve body.

[0018] As an optional solution, the explosion-proof valve also includes an elastic rubber ring;

[0019] The elastic rubber ring is arranged around the outer periphery of the pressure relief port. In the first direction, one end of the elastic rubber ring abuts against the end cap, and the other end abuts against the valve body.

[0020] As an optional solution, the explosion-proof valve also has a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular;

[0021] The first locking member includes a first plate and a second plate; the first plate and the second plate are arranged at intervals along the second direction; the first plate has a second locking hole that passes through the second direction, and the second plate has a third locking hole that passes through the second direction.

[0022] The second locking member includes a third plate, a first locking tongue, a cantilever, and a second locking tongue. The third plate is connected to the driving mechanism and has a through hole extending along the first direction. Both the first plate and the second plate pass through the through hole.

[0023] The through hole has a first inner wall surface and a second inner wall surface arranged adjacent to each other. The first locking tongue is fixedly connected to the first inner wall surface. The first locking tongue extends along the second direction and is arranged opposite to the second lock hole.

[0024] The cantilever portion is located between the first plate and the second plate; in the third direction, the cantilever portion is connected between the second inner wall surface and the second locking tongue portion, the second locking tongue portion extending along the second direction; in the second direction, the second locking tongue portion is disposed opposite to the third lock hole.

[0025] This utility model also provides a battery pack, including the explosion-proof valve mentioned above, and the battery pack further includes a housing, battery cells and a monitoring module;

[0026] The enclosure has a receiving cavity, the battery cell is disposed in the receiving cavity, the enclosure has an installation hole communicating with the receiving cavity, and the explosion-proof valve is connected to the enclosure to seal the installation hole;

[0027] The monitoring module is configured to monitor the air pressure inside the accommodating cavity;

[0028] The drive mechanism and the monitoring module are electrically connected.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] The explosion-proof valve of this utility model includes a valve body, an end cap, a first locking member, a second locking member, and a driving mechanism. The valve body has a pressure relief channel extending through the valve body in a first direction. The valve body has a pressure relief port and a mounting cavity on both sides in the first direction, respectively. The mounting cavity is spaced apart from the pressure relief channel in the second direction. The pressure relief port communicates with the pressure relief channel. The end cap is connected to the valve body and seals the pressure relief port. The first locking member is connected to the side of the end cap facing the pressure relief channel, and at least a portion of the first locking member is located within the pressure relief channel. The driving mechanism is connected to the valve body, and the second locking member is connected to the driving mechanism and locked to the first locking member. The driving mechanism is configured to drive the second locking member to unlock from the first locking member, thereby releasing the end cap and removing the seal of the end cap on the pressure relief port, allowing the pressure relief port to be opened directly. This facilitates the rapid formation of the pressure relief port, thereby improving the efficient release of high-pressure fluid in the pressure relief channel through the pressure relief port. Moreover, at least part of the drive mechanism is disposed in the mounting cavity, and the mounting cavity makes the thickness of the explosion-proof valve of this application relatively thin in the first direction, thereby making the explosion-proof valve structure of this application more compact. Attached Figure Description

[0031] Figure 1 This is a first isometric schematic diagram of the first type of explosion-proof valve according to an embodiment of this utility model;

[0032] Figure 2 This is a second isometric schematic diagram of the first type of explosion-proof valve according to an embodiment of this utility model;

[0033] Figure 3 This is a top view of the first type of explosion-proof valve according to an embodiment of this utility model;

[0034] Figure 4 yes Figure 3 Sectional view along axis AA;

[0035] Figure 5 This is an isometric schematic diagram of the second type of explosion-proof valve according to an embodiment of this utility model;

[0036] Figure 6 This is an explosion diagram of the third type of explosion-proof valve according to an embodiment of this utility model;

[0037] Figure 7 This is a cross-sectional view of the second locking member according to an embodiment of the present utility model;

[0038] Figure 8 This is an isometric schematic diagram of the first locking member according to an embodiment of the present utility model;

[0039] Figure 9 This is an explosion diagram of the fourth type of explosion-proof valve according to an embodiment of this utility model;

[0040] Figure 10 This is an isometric view of the battery pack according to an embodiment of the present invention;

[0041] Figure 11 This is an exploded view of the battery pack according to an embodiment of the present invention;

[0042] In the diagram, Z represents the first direction, X represents the second direction, Y represents the third direction, 1 is the valve body, 11 is the pressure relief channel, 12 is the pressure relief port, 13 is the mounting cavity, 14 is the reinforcing wall, 141 is the guide hole, 2 is the end cap, 21 is the connecting end, 22 is the free end, 3 is the first locking element, 31 is the first locking hole, 32 is the first plate, 321 is the second locking hole, 33 is the second plate, 331 is the third locking hole, 4 is the second locking element, 41 is the first locking element. Three-plate body, 411, through hole, 412, first inner wall surface, 413, second inner wall surface, 42, first locking tongue, 43, cantilever, 44, second locking tongue, 5, drive mechanism, 61, torsion spring, 611, first torsion arm, 612, second torsion arm, 62, first elastic compression member, 63, elastic rubber ring, 7, fixing bracket, 8, sealing ring, 100, housing, 101, receiving cavity, 102, mounting hole, 200, battery cell. Detailed Implementation

[0043] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0044] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the embodiments of the application, "parallel" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is -1° to 1°. "Perpendicular" refers to a state in which the angle formed by two lines, a line and a surface, or a surface is 85° to 95°. Equal distances, equal angles, or equal areas refer to a state in which the tolerance range is -1% to 1%.

[0048] like Figures 1 to 9As shown, in a preferred embodiment of the explosion-proof valve of this utility model, there are a first direction Z, a second direction X, and a third direction Y, which are mutually perpendicular. The explosion-proof valve includes a valve body 1, an end cap 2, a first locking element 3, a second locking element 4, and a drive mechanism 5. The valve body 1 serves as the mounting base for the drive mechanism 5 and the end cap 2. In this embodiment, the valve body 1 has a flat structure. The first direction Z is the thickness direction of the valve body 1. The two sides of the valve body 1 in the first direction Z are the inner side and the outer side, respectively. After the valve body 1 is installed on the battery pack, the inner side faces the inside of the battery pack, and the outer side faces the outside of the battery pack. The second direction X is the length direction of the valve body 1, and the third direction Y is the length direction of the valve body 1. 1. In the width direction; the valve body 1 has a pressure relief channel 11, which runs through the valve body 1 along the first direction Z. The pressure relief channel 11 is the channel for releasing the high-pressure fluid generated by the battery pack. The valve body 1 has a pressure relief port 12 and a mounting cavity 13 on both sides in the first direction Z. The pressure relief port 12 is connected to the pressure relief channel 11. The pressure relief port 12 is located on the outside of the valve body 1 and is the outlet for releasing the high-pressure fluid generated by the battery pack. The mounting cavity 13 is located on the inside of the valve body 1. The end cap 2 is connected to the valve body 1. The end cap 2 is connected to the outside of the valve body 1 and covers the pressure relief port 12 to achieve the sealing of the pressure relief channel 11. The inside of the end cap 2 faces the pressure relief channel 11, and the outside of the end cap 2 faces away from the pressure relief channel 11. The first locking member 3 is connected to the inner side of the end cover 2, and at least a portion of the first locking member 3 is located in the pressure relief channel 11; the end of the first locking member 3 away from the end cover 2 in the first direction Z extends toward the inner side of the valve body 1, and the mounting cavity 13 is arranged at intervals with the pressure relief channel 11 in the second direction X. The mounting cavity 13 forms a mounting space for accommodating the drive mechanism 5. At least a portion of the drive mechanism 5 is located within the mounting cavity 13 and is connected to the valve body 1. The second locking member 4 is connected to the drive mechanism 5 and is locked with the first locking member 3, enabling the end cover 2 to seal the pressure relief port 12, thereby sealing the pressure relief channel 11 and keeping the explosion-proof valve in a sealed state. The drive mechanism 5 is configured to unlock the second locking member 4 from the first locking member 3, thereby releasing the end cover 2 from the pressure relief port 12 and allowing the pressure relief port 12 to be opened directly. Compared to the prior art where the pressure relief port formed by the pin piercing the diaphragm is relatively small, the pressure relief port 12 in this embodiment can be opened directly and a larger pressure relief port can be formed more quickly (the pressure relief port is pre-set and is larger than the pressure relief port formed by the pin piercing the diaphragm in the prior art), meaning that the pressure relief port can be opened directly at once. Furthermore, once the pressure relief port 12 is directly opened, the pressure relief channel 11 is connected to the outside without any obstruction, which is conducive to improving the efficient release of high-temperature and high-pressure fluid in the pressure relief channel 11 through the pressure relief port 12, thereby improving the safety of the battery pack.Furthermore, at least a portion of the drive mechanism 5 is housed within the mounting cavity 13, resulting in a smaller overall thickness of the drive mechanism 5 and valve body 1 in the first direction Z. This reduces the overall thickness of the explosion-proof valve in the first direction Z, making the overall structure of the explosion-proof valve flatter. While achieving efficient pressure relief, this also enables a lightweight and thin design of the explosion-proof valve, adapting to the space requirements of the battery pack. The high-temperature, high-pressure fluid within the pressure relief channel 11 is generated after the lithium battery experiences thermal runaway. The high-temperature, high-pressure fluid is efficiently released to the outside through the pressure relief port 12.

[0049] In some embodiments, such as Figure 5 , Figure 9 As shown, the explosion-proof valve also includes a first elastic compression member 62, which is disposed between the valve body 1 and the end cap 2. The first elastic compression member 62 is located on the outside of the valve body 1 in the first direction Z. One end of the first elastic compression member 62 near the valve body 1 abuts against the valve body 1, and the other end abuts against the end cap 2. When the end cap 2 seals the pressure relief port 12, the first elastic compression member 62 is under pressure. The first elastic compression member 62 can be a spring, an elastic rubber part, or an elastic metal sheet. The core function of the first elastic compression member 62 is to store elastic potential energy through compression and to apply an elastic thrust to the end cap 2. This elastic thrust is directed away from the valve body 1. After the drive mechanism 5 drives the second locking member 4 to unlock from the first locking member 3, the elastic potential energy stored in the first elastic compression member 62 is released, pushing the end cap 2 to move away from the valve body 1, thereby quickly opening the pressure relief port 12.

[0050] In some embodiments, such as Figures 1 to 5 As shown, in the second direction X, the end cap 2 includes a connecting end 21 and a free end 22 disposed opposite to each other. The connecting end 21 is hinged to the valve body 1, and the first locking member 3 is connected to the free end 22. When the second locking member 4 locks the first locking member 3, the first locking member 3 applies a constraint to the end cap 2, causing the end cap 2 to seal the pressure relief port 12. After the second locking member 4 unlocks from the first locking member 3, the free end 22 loses its constraint and rotates outward of the valve body 1 under the thrust of the first elastic compression member 62, actively opening the pressure relief port 12.

[0051] In some embodiments, the first elastic compression member 62 may not be provided. After the second locking member 4 is unlocked from the first locking member 3, the high-pressure fluid inside the battery pack enters the pressure relief channel 11 and impacts the end cap 2 outward. The free end 22 rotates outward to the valve body 1 under the impact of the high-pressure fluid, thereby opening the pressure relief port 12.

[0052] In some embodiments, such as Figure 1 , Figure 3As shown, the explosion-proof valve also includes a torsion spring 61, which includes a first torsion arm 611 and a second torsion arm 612. The first torsion arm 611 is connected to the end cover 2, and the second torsion arm 612 is connected to the valve body 1. Specifically, the first torsion arm 611 and the second torsion arm 612 are arranged at an angle, and the angle between the first torsion arm 611 and the second torsion arm 612 is greater than zero degrees. The second torsion arm 612 applies a torque to the end cover 2, causing the end cover 2 to flip outward. After the second locking member 4 is unlocked from the first locking member 3, under the action of the torque of the second torsion arm 612, the free end 22 rotates outward to the valve body 1, actively opening the pressure relief port 12.

[0053] In some embodiments, in the first direction Z, the end of the first locking member 3 away from the end cover 2 has a first locking hole 31; the second locking member 4 is a locking pin, which is inserted into the first locking hole 31 to lock the first locking member 3; the driving mechanism 5 is configured to drive the locking pin out of the first locking hole 31 to unlock the first locking member 3.

[0054] In some embodiments, the explosion-proof valve further includes a reinforcing wall 14. In the first direction Z, the reinforcing wall 14 is connected to the side of the valve body 1 away from the end cover 2; in the second direction X, the reinforcing wall 14 is located between the mounting cavity 13 and the pressure relief channel 11; the reinforcing wall 14 has a guide hole 141 extending along the second direction X, and the locking pin is slidably inserted into the guide hole 141. Specifically, the area between the mounting cavity 13 and the pressure relief channel 11 is a weak area in the structure of the valve body 1. The reinforcing wall 14 improves the strength of this weak area, and the reinforcing wall 14 can support the locking pin, guide and limit the locking pin, improve the concentricity between the locking pin and the lock hole, ensure that the locking pin can be smoothly inserted into the lock hole, and improve the reliability of the repeated operation of the locking mechanism. The single-sided gap between the guide hole 141 and the locking pin is greater than or equal to 0.05 mm and less than or equal to 0.1 mm, which avoids the locking pin from getting stuck due to too small a gap or the guiding accuracy from being too large a gap. In addition, integrating the guide hole 141 into the reinforcing wall 14 simplifies the internal structure of the explosion-proof valve and reduces the manufacturing cost of the explosion-proof valve.

[0055] In some embodiments, the end cap 2 is detachably connected to the valve body 1; the drive mechanism 5 is configured to drive the second locking member 4 to unlock the first locking member 3, so that the end cap 2 is detached from the valve body 1. After the second locking member 4 and the first locking member 3 are unlocked, the end cap 2 can be completely detached from the valve body 1, the pressure relief port 12 is unobstructed, and the cross-sectional area of ​​the pressure relief channel 11 is effectively utilized to achieve 100% utilization. This is suitable for scenarios with rapid pressure reduction requirements and can reduce the internal pressure of the battery pack in a shorter time. Moreover, the end cap 2 can be completely disassembled as an independent component, without the need to set hinge points on the valve body 1, which facilitates the manufacturing and assembly of the valve body 1 and reduces the manufacturing cost of the valve body 1.

[0056] In some embodiments, such as Figure 6 , Figure 9As shown, the explosion-proof valve also includes an elastic rubber ring 63; the elastic rubber ring 63 is arranged around the outer periphery of the pressure relief port 12. In the first direction Z, one end of the elastic rubber ring 63 abuts against the end cover 2, and the other end abuts against the valve body 1. When the second locking member 4 is in the locked state, the elastic rubber ring enhances the sealing between the end cover 2 and the valve body 1. After the second locking member 4 is unlocked, the elastic restoring force of the rubber ring can help the end cover 2 quickly disengage from the valve body 1, improving the pressure relief response speed.

[0057] In some embodiments, such as Figures 7 to 9 As shown, the first locking member 3 includes a first plate 32 and a second plate 33; the first plate 32 and the second plate 33 are arranged at intervals along the second direction X; the first plate 32 has a second locking hole 321 extending along the second direction X, and the second plate 33 has a third locking hole 331 extending along the second direction X; the second locking member 4 includes a third plate 41, a first locking tongue 42, a cantilever 43, and a second locking tongue 44; the third plate 41 is connected to the driving mechanism 5; the third plate 41 has a through hole 411 extending along the first direction Z; both the first plate 32 and the second plate 33 pass through the through hole. 411; The through hole 411 has a first inner wall surface 412 and a second inner wall surface 413 arranged adjacent to each other. The first locking tongue 42 is fixedly connected to the first inner wall surface 412. The first locking tongue 42 extends along the second direction X and is arranged opposite to the second lock hole 321. The cantilever 43 is located between the first plate 32 and the second plate 33. In the third direction Y, the cantilever 43 is connected between the second inner wall surface 413 and the second locking tongue 44. The second locking tongue 44 extends along the second direction X. In the second direction X, the second locking tongue 44 is arranged opposite to the third lock hole 331. When the second locking member 4 and the first locking member 3 are locked together, the first locking tongue 42 passes through the second locking hole 321 and the second locking tongue 44 passes through the third locking hole 331, which improves the locking stability of the second locking member 4 and the first locking member 3. Moreover, the first locking tongue 42 and the second locking tongue 44 are integrated on the third plate 41. The thickness of the first locking tongue 42, the cantilever 43 and the second locking tongue 44 in the first direction Z are all the same as the thickness of the third plate 41, so the second locking member 4 can be formed by punching.

[0058] In some embodiments, the driving device is a miniature push-pull electromagnet, model U1240, manufactured by Dongguan Magnetic Core Electromagnetic Technology Co., Ltd. The miniature push-pull electromagnet includes an electromagnetic drive mechanism 5, a moving iron core, and a compression spring sleeved on the outside of the moving iron core. When the power is off, the reset spring resets the moving iron core to its initial position. At this time, the second locking member 4 and the first locking member 3 are locked together. When it is necessary to unlock the first locking member 3 and the second locking member 4, the electromagnetic drive mechanism 5 is energized, which drives the moving iron core to squeeze the compression spring. The length of the moving iron core protruding from the electromagnetic drive mechanism 5 is shortened, thereby pulling the second locking member 4 away from the first locking member 3, so that the second locking member 4 and the first locking member 3 are unlocked.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] This application also proposes an embodiment of a battery pack, which includes the aforementioned explosion-proof valve, and further includes a housing 100, a battery cell 200, and a monitoring module; the housing 100 has a receiving cavity 101, the battery cell 200 is disposed in the receiving cavity 101, the housing 100 has a mounting hole 102 communicating with the receiving cavity 101, the explosion-proof valve is connected to the housing 100 to seal the mounting hole 102; the monitoring module is disposed in the receiving cavity 101, and the monitoring module is configured to monitor the air pressure in the receiving cavity 101; the drive mechanism 5 is electrically connected to the monitoring module. Specifically, the monitoring module includes a pressure monitoring sensor and a controller. Both the pressure monitoring sensor and the drive mechanism 5 are electrically connected to the controller. The pressure monitoring sensor uses a BPS-SNP805 chip and can monitor the gas pressure inside the containment cavity 101. The controller can receive the test signal from the pressure monitoring sensor and send an electrical signal to the drive mechanism 5 when the detected value (the detected gas pressure value inside the containment cavity 101) exceeds a set threshold, controlling the drive mechanism 5 to move. The drive mechanism 5 moves the second locking member 4, causing the second locking member 4 to unlock from the first locking member 3, thereby releasing the end cover 2 and removing the seal of the end cover 2 on the pressure relief port 12, allowing the pressure relief port 12 to be opened directly. This facilitates efficient release of high-pressure fluid in the pressure relief channel 11 through the pressure relief port 12. In one embodiment, the controller uses an SNJ32L003 chip.

[0061] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An explosion-proof valve having a first direction (Z) and a second direction (X) perpendicular to each other, characterized by, The explosion-proof valve includes a valve body (1), an end cap (2), a first locking element (3), a second locking element (4), and a drive mechanism (5); The valve body (1) has a pressure relief channel (11) that extends through the valve body (1) along the first direction (Z); the valve body (1) has a pressure relief port (12) and a mounting cavity (13) on both sides of the first direction (Z), the pressure relief port (12) is connected to the pressure relief channel (11), and the mounting cavity (13) is spaced apart from the pressure relief channel (11) in the second direction (X); The end cap (2) is connected to the valve body (1) and seals the pressure relief port (12); The first locking member (3) is connected to the end cap (2) on the side facing the pressure relief channel (11), and at least a portion of the first locking member (3) is located within the pressure relief channel (11); The drive mechanism (5) is connected to the valve body (1), and at least a portion of the drive mechanism (5) is located in the mounting cavity (13). The second locking member (4) is connected to the drive mechanism (5) and is locked to the first locking member (3). The drive mechanism (5) is configured to drive the second locking member (4) to unlock from the first locking member (3), thereby releasing the end cap (2) from sealing the pressure relief port (12).

2. The explosion relief valve of claim 1, wherein The explosion-proof valve also includes a first elastic compression member (62), which is disposed between the valve body (1) and the end cap (2); In the first direction (Z), the first elastic compression member (62) abuts against the valve body (1) at one end and against the end cap (2) at the other end.

3. The explosion-proof valve according to claim 1, characterized in that, In the second direction (X), the end cap (2) includes a connecting end (21) and a free end (22) disposed opposite to each other, the connecting end (21) being hinged to the valve body (1), and the first locking member (3) being connected to the free end (22).

4. The explosion-proof valve according to claim 3, characterized in that, The explosion-proof valve also includes a torsion spring (61), which includes a first torsion arm (611) and a second torsion arm (612). The first torsion arm (611) is connected to the end cap (2), and the second torsion arm (612) is connected to the valve body (1).

5. The explosion-proof valve according to claim 1, characterized in that, In the first direction (Z), the first locking member (3) has a first locking hole (31) at the end away from the end cap (2); The second locking member (4) is a locking pin, which is inserted into the first locking hole (31); the driving mechanism (5) is configured to drive the locking pin out of the first locking hole (31).

6. The explosion-proof valve according to claim 5, characterized in that, The explosion-proof valve further includes a reinforcing wall (14), which is connected to the side of the valve body (1) away from the end cap (2) in the first direction (Z); and in the second direction (X), the reinforcing wall (14) is located between the mounting cavity (13) and the pressure relief channel (11); the reinforcing wall (14) has a guide hole (141) extending along the second direction (X), and the locking pin is slidably inserted in the guide hole (141).

7. The explosion-proof valve according to claim 1, characterized in that, The end cap (2) is detachably connected to the valve body (1); The drive mechanism (5) is configured to drive the second locking member (4) to unlock from the first locking member (3), thereby disengaging the end cap (2) from the valve body (1).

8. The explosion-proof valve according to claim 7, characterized in that, The explosion-proof valve also includes an elastic rubber ring (63); The elastic rubber ring (63) is arranged around the outer periphery of the pressure relief port (12). In the first direction (Z), one end of the elastic rubber ring (63) abuts against the end cap (2) and the other end abuts against the valve body (1).

9. The explosion-proof valve according to claim 1, characterized in that, The explosion-proof valve also has a third direction (Y), and the first direction (Z), the second direction (X) and the third direction (Y) are perpendicular to each other; The first locking member (3) includes a first plate (32) and a second plate (33); the first plate (32) and the second plate (33) are arranged at intervals along the second direction (X); the first plate (32) has a second locking hole (321) through the second direction (X), and the second plate (33) has a third locking hole (331) through the second direction (X); The second locking member (4) includes a third plate (41), a first locking tongue (42), a cantilever (43), and a second locking tongue (44). The third plate (41) is connected to the driving mechanism (5). The third plate (41) has a through hole (411) extending along the first direction (Z). The first plate (32) and the second plate (33) are both inserted through the through hole (411). The through hole (411) has a first inner wall surface (412) and a second inner wall surface (413) arranged adjacent to each other. The first locking tongue (42) is fixedly connected to the first inner wall surface (412). The first locking tongue (42) extends along the second direction (X) and is arranged opposite to the second lock hole (321). The cantilever portion (43) is located between the first plate (32) and the second plate (33); in the third direction (Y), the cantilever portion (43) is connected between the second inner wall surface (413) and the second locking tongue portion (44), the second locking tongue portion (44) extends along the second direction (X); in the second direction (X), the second locking tongue portion (44) is disposed opposite to the third locking hole (331).

10. A battery pack, characterized in that, The explosion-proof valve, as described in any one of claims 1 to 9, further includes a housing (100), a battery cell (200), and a monitoring module; The housing (100) has a receiving cavity (101), the battery cell (200) is disposed in the receiving cavity (101), the housing (100) has a mounting hole (102) communicating with the receiving cavity (101), and the explosion-proof valve is connected to the housing (100) to seal the mounting hole (102); The monitoring module is configured to monitor the air pressure inside the accommodating cavity (101); The drive mechanism (5) and the monitoring module are electrically connected.

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