Two-way vent valve, battery and power consumption device

Abstract

To provide a two-way vent valve, a battery, and a power consumption device, which allow gas at both ends of the valve to be controllably exchanged in both directions, and when used with a battery or a device that uses a battery, reduces the effect of moisture outside the battery and avoids the risk of condensation on the battery.SOLUTION: A two-way vent valve includes a valve seat (110) that forms a gas passage (111) having a first end and a second end, a two-way valve assembly (120) movably provided in the gas passage and opening or closing the gas passage by moving relative to the gas passage, and a first elastic member (130) that applies force to the two-way valve assembly (120) to close the gas passage, and the first elastic member (130) is configured such that when the air pressure difference between the first end and the second end of the gas passage is greater than a first threshold value, the two-way valve assembly overcomes the force of the first elastic member to open the gas passage.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to a Chinese patent application filed on January 12, 2021, with application number 202110032669.9, entitled "Two-way vent valve, battery and device," the entire contents of which are incorporated herein by reference.

[0002] FIELD OF THE INVENTION The present application relates to the field of power batteries, and more particularly to two-way vent valves, batteries, and power consuming devices. [Background technology]

[0003] Power battery packs typically use a sealed design, and in addition to meeting basic requirements for waterproofing and dustproofing, they must also have ventilation capabilities. When a vehicle or other device is in operation, the pressure inside and outside the battery pack varies due to heat generation and altitude changes. To maintain pressure balance and prevent deformation and failure of the electronic pack's casing or sealing interface due to pressure, it is necessary to be able to replenish and remove gas in a timely manner.

[0004] Currently, battery pack ventilation devices typically use a valve body with a waterproof and breathable membrane, which not only meets basic waterproof and dustproof requirements but also uses a waterproof and breathable membrane to balance the air pressure inside and outside the battery pack. However, conventional waterproof and breathable membrane valve bodies are designed to be constantly open, making them susceptible to external moisture and subject to the risk of condensation. Condensation can cause component malfunctions and even insulation failure or short circuit failures, posing a significant risk to the safety of users and their property. Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above problems, the embodiments of the present application provide a two-way vent valve, a battery, and a power consumption device that allows gas to be controlled to be exchanged in both directions at both ends of the valve, and when used in a battery or a device that uses a battery, reduces the effects of moisture outside the battery and avoids the risk of condensation on the battery. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a two-way vent valve, the two-way vent valve comprising: a valve seat for forming a gas passage having a first end and a second end; and a two-way valve assembly movably provided in the gas passage, the two-way valve assembly including a first valve plate and a second valve plate, the first valve plate having a first through-hole and the second valve plate having a second through-hole, the first through-hole and the second through-hole being spaced apart from each other when projected in an axial direction of the gas passage; a first elastic member, wherein one biasing end of the first elastic member abuts against the first valve plate or the second valve plate to apply a force to the first valve plate and / or the second valve plate to bring the first valve piece and the second valve piece closer to each other, in order to close the gas passage, and wherein when the air pressure difference between the first end and the second end of the gas passage reaches a first threshold value, the first valve piece is configured to move toward the first end to open the gas passage, or the second valve piece is configured to move toward the second end to open the gas passage.

[0007] In any one embodiment, the first valve plate and the second valve plate are provided coaxially with the gas passage, and one of the first through hole and the second through hole is provided coaxially with the gas passage, and the other is provided along a circumferential direction of the gas passage.

[0008] In one optional aspect, the two-way valve assembly further includes a first seal provided on the first valve plate and / or the second valve plate, and when the two-way valve assembly closes the gas passage, the first seal is located between the first valve plate and the second valve plate and separates the first through-hole from the second through-hole.

[0009] In one optional embodiment, a recessed groove is provided in the first valve plate and / or the second valve plate, and the first seal is fixed to the recessed groove and protrudes from the recessed groove.

[0010] In any one embodiment, a blocking portion is provided on an inner wall of the gas passage, the first valve plate and the second valve plate are provided on both sides of the blocking portion in the axial direction of the gas passage, the first valve plate is located on a side of the blocking portion closer to the first end, and the second valve plate is located on a side of the blocking portion closer to the second end.

[0011] In one optional embodiment, a first inclined surface is provided on the edge of the blocking portion facing the first sealing material, a second inclined surface is provided on the edge of the first sealing material, and the first inclined surface is sealingly connected to the second inclined surface.

[0012] In one optional aspect, the two-way valve assembly further includes an end cap, the end cap movably disposed at the first end of the gas passage, the end cap for connecting with the second valve plate, and the first resilient member positioned between the end cap and the first valve plate.

[0013] In one optional aspect, the two-way valve assembly further includes a connecting post for connecting the end cap and the second valve plate.

[0014] In one optional embodiment, the first elastic member is a first spring fitted to the connecting post.

[0015] In any one embodiment, the two-way vent valve further includes: a mounting seat movably mounted on the valve seat, the mounting seat having a pressure release passage; a third valve plate fixed to the valve seat and located at the second end of the gas passage, the third valve plate configured to open or close the pressure release passage by movement of the valve seat relative to the mounting seat; and a second elastic member configured to apply a force to the third valve plate to close the pressure release passage, the second elastic member configured so that when the air pressure at the first end of the gas passage is greater than the air pressure at the second end and the air pressure difference reaches a second threshold value, the third valve plate overcomes the force of the second elastic member and opens the pressure release passage, the second threshold value being greater than the first threshold value.

[0016] In one embodiment, a mounting hole is provided in the center of the mounting seat, and the valve seat is fitted into the mounting hole.

[0017] In one embodiment, the pressure release passage is provided along the circumferential direction of the gas passage.

[0018] In any one embodiment, a mounting groove surrounding the mounting hole is provided on the side of the mounting seat facing the first end, a restricting portion is provided on the outer periphery of the valve seat near the first end, and the second elastic member is a second spring provided between the mounting groove and the restricting portion.

[0019] According to another aspect of the present invention, there is provided a battery including: a battery cell; a case for accommodating the battery cell; and a two-way vent valve provided in the case, the first end of the gas passage being provided toward the inside of the case and the second end of the gas passage being provided toward the outside of the case.

[0020] According to a further aspect of an embodiment of the present application, there is provided a power consuming device including the battery described above for providing electrical energy. [Effects of the Invention]

[0021] The two-way vent valve of the present invention uses a first elastic member to apply a force to the two-way valve assembly to close the gas passage within the valve seat. When the air pressure difference between both ends of the gas passage is greater than a first threshold, the two-way valve assembly overcomes the force of the first elastic member and opens the gas passage. In this way, the air pressure is driven to achieve bidirectional, controllable adjustment of the air pressure balance between both ends of the gas passage. When the air pressures at both ends of the gas passage are balanced, the gas passage is closed. Compared to the normally open vent valve design of the prior art, the two-way vent valve of the present invention can reduce the impact of moisture outside the battery and reduce the risk of condensation when applied to batteries and battery-powered devices.

[0022] The above description is merely a summary of the technical solution of the present application, in order to make the technical solution of the present application more clearly understood and implemented based on the content of the specification, and to make the above and other objects, features and advantages of the present application more clearly and easily understood, specific embodiments of the present application are specifically listed below.

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limitations on the present application. The same reference numerals are used to represent the same elements in all figures. The accompanying drawings are as follows: [Brief explanation of the drawings]

[0024] [Figure 1] 1A and 1B are diagrams showing the three-dimensional structure of a two-way vent valve according to an embodiment of the present application. [Figure 2] 1 is an exploded view of a two-way vent valve according to one embodiment of the present application. [Figure 3] 1 is a diagram showing a cross section of a plane along the axis of a gas passage of a valve seat in a two-way vent valve according to an embodiment of the present application. [Figure 4] 1 is a diagram showing the three-dimensional structure of a first valve plate in a two-way vent valve according to an embodiment of the present application. [Figure 5] 3A and 3B are diagrams showing the three-dimensional structure of a second valve plate in a two-way vent valve according to an embodiment of the present application. [Figure 6] 1 is a diagram showing the structure of a front side of a two-way vent valve according to an embodiment of the present application. [Figure 7] 7 is a cross-sectional view of a two-way vent valve according to one embodiment of the present application taken along the plane AA in FIG. 6. FIG. [Figure 8] 7 is a cross-sectional view taken along the plane AA of FIG. 6 in a two-way vent valve according to another embodiment of the present application. [Figure 9] 7 is a cross-sectional view of a two-way vent valve provided in accordance with one embodiment of the present disclosure, taken along the plane AA of FIG. 6, with the two-way valve assembly and the first elastic member removed to show the gas passageway. [Figure 10] 1 is a diagram showing a cross-sectional structure of a two-way vent valve according to an embodiment of the present invention when exhausting air. [Figure 11] 1 is a diagram showing a cross-sectional structure of a two-way vent valve according to an embodiment of the present invention during intake. [Figure 12] 1 is a cross-sectional view showing the structure of a two-way vent valve according to an embodiment of the present invention when the valve is in an explosion-proof pressure release state; [Figure 13] FIG. 10 is a diagram showing a three-dimensional structure of a battery according to another embodiment of the present application. [Figure 14] FIG. 10 is a diagram illustrating the structure of a power consumption device according to yet another embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following detailed description will be given of the embodiments of the technical solution of the present application in conjunction with the drawings. The following embodiments are only used to more clearly explain the technical solution of the present application, and are therefore merely illustrative and cannot be used to limit the protection scope of the present application.

[0026] Please refer to Figures 1 and 2, which respectively show a three-dimensional structure and an exploded structure of a two-way vent valve according to one embodiment of the present application.

[0027] As shown in the figure, the two-way vent valve 100 includes a valve seat 110, a two-way valve assembly 120, and a first elastic member 130. The valve seat 110 forms a gas passage 111. The two ends of the gas passage 111 are a first end and a second end, respectively. In the following description, the left end of the gas passage 111 in FIG. 2 is referred to as the first end, and the right end is referred to as the second end. The two-way valve assembly 120 is disposed in the gas passage 111 and is movable within the gas passage 111. The gas passage 111 is opened, closed, and closed by utilizing the movement of the two-way valve assembly 120 relative to the gas passage 111. The first elastic member 130 biases the two-way valve assembly 120 to cause the two-way valve assembly 120 to close the gas passage 111.

[0028] When the air pressure difference across the gas passage 111 exceeds a predetermined threshold (first threshold), the two-way valve assembly 120 is affected by this air pressure difference and moves within the gas passage 111, overcoming the force of the first elastic member 130, opening the gas passage 111 and allowing gas to flow across the two-way vent valve 100 for exhaust or intake, thereby achieving equilibrium in the air pressure across the gas passage 111. When the air pressures are balanced, that is, when the air pressure difference across the gas passage 111 falls below the first threshold, the two-way valve assembly 120 is restored by the biasing action of the first elastic member 130 and closes the gas passage 111 again.

[0029] In the two-way vent valve 100 provided in the embodiment of the present application, the first elastic member 130 is used to bias the two-way valve assembly 120, causing the two-way valve assembly 120 to close the gas passage 111 when the air pressure difference across the two ends of the gas passage 111 does not reach the first threshold, i.e., when the air pressures at both ends are balanced, and only when the air pressure difference across the two ends of the gas passage 111 exceeds the first threshold, the gas passage 111 is opened. In this way, the air pressure drive realizes bidirectional controllable adjustment of the balance of the air pressures at both ends of the gas passage 111 of the two-way vent valve 100.

[0030] Compared to the conventional normally open vent valve design, in which gas is exchanged between both ends in real time, the two-way vent valve 100 of the present application exchanges gas between both ends of the valve on an as-needed basis. When used in a battery, this on-demand exchange significantly reduces the frequency and amount of gas exchange between the battery and the outside, reduces the impact of external moisture on the battery interior, reduces the risk of condensation, and improves the reliability and safety of the battery and power-consuming device.

[0031] In the specific embodiment shown in the figures, the valve seat 110 is generally cylindrical. Correspondingly, the gas passage 111 is cylindrical and has an axis, such as the axis shown in Figure 3, that passes through the center of the cross section of the gas passage 111 and extends longitudinally from the first end to the second end. This structure is relatively simple and convenient to assemble.

[0032] However, those skilled in the art should understand that for purposes of the present application, the illustrated examples are merely representative, and that in other embodiments, the valve seat 110 and the gas passage 111 may have other shapes and configurations. For example, the gas passage 111 may have a different cross-sectional shape, or the gas passage 111 may have multiple segments that communicate with each other, and the segments may be parallel, perpendicular, or at other angles to each other.

[0033] Please continue to refer to Figure 2, and further refer to Figures 3 to 5. Here, Figure 3 shows the cross-sectional structure of a plane along the axis of the valve seat 110 of the two-way vent valve 100 according to one embodiment of the present application. Figures 4 and 5 respectively show the three-dimensional structures of the first valve plate 121 and the second valve plate 123 of the two-way vent valve 100 according to one embodiment of the present application.

[0034] In the specific embodiment shown in the figures, the two-way valve assembly 120 of the two-way vent valve 100 includes a first valve plate 121 and a second valve plate 123. The first valve plate 121 is provided with a first through-hole 122, and the second valve plate 123 is provided with a second through-hole 124. The first through-hole 122 and the second through-hole 124 are spaced apart from each other when projected in the axial direction of the gas passage 111. The first elastic member 130 biases the first valve plate 121 or the second valve plate 123, or biases both the first valve plate 121 and the second valve plate 123, bringing them closer to each other and closing the gas passage 111.

[0035] The first valve plate 121 and the second valve plate 123 are disposed within the gas passage 111 along the axial direction of the gas passage 111. Because the first through-hole 122 and the second through-hole 124 are provided at offset positions, when the first valve plate 121 and the second valve plate 123 move along the axial direction of the gas passage 111 due to the biasing action of the first elastic member 130 and approach or are pressed against each other, the first through-hole 122 and the second through-hole 124 do not overlap or overlap and communicate with each other, making it easy for the two-way valve assembly 120 to effectively close the gas passage 111.

[0036] Furthermore, gas from the first end of the gas passage 111 acts on the second valve plate 123 through the first through-hole 122, and gas from the second end of the gas passage 111 acts on the first valve plate 121 through the second through-hole 124. When the air pressure difference between both ends of the gas passage 111 reaches a first threshold, the two-way valve assembly 120 overcomes the acting force of the first elastic member 130 and, driven by the air pressure difference, moves the first valve plate 121 toward the first end of the gas passage 111, moves the second valve plate 123 toward the second end of the gas passage 111, or moves both the first valve plate 121 and the second valve plate 123 toward the first end and the second end of the gas passage 111, respectively, thereby separating or moving the two valve plates away from each other. Gas exchange between both ends of the gas passage 111 is achieved by communication of "first through-hole 122 - gap between first valve plate 121 and second valve plate 123 - second through-hole 124".

[0037] After the exhaust or intake gas exchange is completed, the air pressure balance is restored between both ends of the gas passage 111, i.e., the air pressure difference between both ends falls below the first threshold. At this time, the acting force of the air pressure difference on the two-way valve assembly 120 is insufficient to counter the acting force of the first elastic member 130, and the first valve plate 121 and the second valve plate 123 approach each other again under the bias of the first elastic member 130 to close the gas passage 111.

[0038] The first valve plate 121 and the second valve plate 123 are arranged along the axial direction of the gas passage 111, and the first through-hole 122 and the second through-hole 124 are provided, so that gas at both ends of the gas passage 111 passes through the first through-hole 122 and the second through-hole 124 to act on the second valve plate 123 and the first valve plate 121, respectively. This helps to adjust the pressure-receiving area of ​​the valve plate by adjusting the size of the through-hole according to the opening pressure requirements of the intake and exhaust, and the structure is flexible and can meet various needs.

[0039] In the specific embodiment shown in the figures, the first valve plate 121 and the second valve plate 123 in the two-way valve assembly 120 move along the axial direction of the gas passage 111. However, as should be understood by those skilled in the art, the illustrated example is merely a typical example. In other embodiments, the two-way valve assembly 120 may have other movement patterns. For example, when the pressure difference between both ends of the gas passage 111 is greater than a first threshold value, the first valve plate 121 and / or the second valve plate 123 overcome the force of the first elastic member 130 and rotate relative to each other within the gas passage 111, or move along a direction perpendicular to the axial direction of the gas passage 111, thereby communicating the first through-hole 122 and the second through-hole 124 and opening the gas passage 111.

[0040] In some embodiments, the first valve plate 121 and the second valve plate 123 are arranged coaxially with the gas passage 111. Furthermore, one of the first through-hole 122 and the second through-hole 124 is arranged coaxially with the gas passage 111, and the other is arranged along the circumferential direction of the gas passage 111. This design simplifies the overall structure of the two-way vent valve 100, uniforms the pressure received by the first valve plate 121 and the second valve plate 123, ensures axial movement of the first valve plate 121 and the second valve plate 123 in the gas passage 111, and helps to improve the structural stability and reliability of the two-way valve assembly 120 and the two-way vent valve 100.

[0041] 2 to 5. In the specific embodiment shown in the figures, the first through-hole 122 of the first valve plate 121 is arranged coaxially with the gas passage 111, and the second through-hole 124 of the second valve plate 123 is arranged along the circumferential direction of the gas passage 111. It should be understood by those skilled in the art that in other embodiments, the first through-hole 122 of the first valve plate 121 may be arranged along the circumferential direction of the gas passage 111, and the second through-hole 124 of the second valve plate 123 may be arranged coaxially with the gas passage 111, and the number of first through-holes 122 or second through-holes 124 arranged along the circumferential direction of the gas passage 111 may be one or more.

[0042] Please continue to refer to Figure 2, and further refer to Figures 6 to 8. Here, Figure 6 schematically shows the front structure of a two-way vent valve 100 according to one embodiment of the present application, and Figures 7 and 8 respectively show schematic cross-sectional structures of two-way vent valves 100 according to two different embodiments of the present application, taken along plane AA in Figure 6.

[0043] In the specific embodiment shown in the figures, the two-way valve assembly 120 may further include a first seal 125. The first seal 125 may be provided on the first valve plate 121, the second valve plate 123, or both the first valve plate 121 and the second valve plate 123. When the two-way valve assembly 120 closes the gas passage 111, the first seal 125 is located between the first valve plate 121 and the second valve plate 123 and separates the first through-hole 122 from the second through-hole 124.

[0044] Providing the first seal 125 and providing the first seal 125 on the first valve plate 121 and / or the second valve plate 123 is advantageous in enhancing the closing effect of the gas passage 111 by the two-way valve assembly 120, avoiding poor closing caused by a gap between the first valve plate 121 and the second valve plate 123, and also in elastically cushioning contact between the first valve plate 121 and the second valve plate 123.

[0045] The first seal 125 may be, for example, a packing as shown in Fig. 7 or a seal ring as shown in Fig. 8. It should be understood by those skilled in the art that the illustrated example is merely a typical example, and in other embodiments, there may be one or more first seals 125, as long as they can separate the first through-hole 122 from the second through-hole 124 when the first valve plate 121 and the second valve plate 123 approach each other to close the gas passage 111.

[0046] Please continue to refer to FIGS. 4 and 7 . In some embodiments, the valve plate may further include a groove 126 for fixing the first seal 125, and the first seal 125 may be fixed in the groove 126 with a portion protruding from the groove 126. In the specific embodiment shown in the figures, the groove 126 is provided in the first valve plate 121 and is provided along the outer periphery of the first through-hole 122. However, it should be understood by those skilled in the art that in other embodiments, the groove 126 may be provided in the second valve plate 123, or the first valve plate 121 and the second valve plate 123 may each include a groove 126. Furthermore, if the first seal 125 has a different structure or arrangement, the arrangement of the groove 126 may be adapted to the structure and number of the first seal 125. For example, multiple grooves 126 may be provided to fix multiple first seals 125.

[0047] Instead of providing the first seal 125 so that it directly contacts the inner wall of the valve seat 110, a groove 126 is provided in the valve plate and the first seal 125 is fixed to the valve plate. This eliminates or prevents friction between the valve seat 110 and the first seal 125, thereby improving sealing reliability. The depth of the groove 126 may be designed based on the amount of compression of the first seal 125. When the first valve plate 121 and the second valve plate 123 approach each other due to the action of the first elastic member 130 to close the gas passage 111, the portion of the first seal 125 protruding from the groove 126 elastically contacts the other valve plate or the first seal 125 on the other valve plate, further enhancing the separation effect between the first through-hole 122 and the second through-hole 124 and the closing effect on the gas passage 111.

[0048] Continuing to refer to Figure 3, please also refer to Figure 9, which is a schematic cross-sectional view of a two-way vent valve 100 according to one embodiment of the present application, taken along plane AA in Figure 6. In the figure, the two-way valve assembly 120 and the first elastic member 130 have been removed to reveal the gas passage 111.

[0049] In the specific embodiment shown in the figure, a blocking portion 112 may be provided on the inner wall of the gas passage 111. A first valve plate 121 and a second valve plate 123 are provided on both sides of the blocking portion 112 in the axial direction of the gas passage 111. Here, the first valve plate 121 is located on the side of the blocking portion 112 closer to the first end of the gas passage 111, and the second valve plate 123 is located on the side of the blocking portion 112 closer to the second end of the gas passage 111. As shown in the figure, the blocking portion 112 may be a rib provided on the inner wall of the gas passage 111 so as to be continuous along the circumferential direction of the gas passage 111. In other embodiments, the blocking portion 112 may be one or more protrusions. When multiple protrusions are present, these protrusions may be arranged uniformly or non-uniformly along the circumferential direction of the gas passage.

[0050] By providing the blocking portion 112 within the gas passage 111, when the gas passage is closed, the two-way valve assembly 120 is blocked by the blocking portion 112 and held at a specific position within the gas passage 111, thereby improving the stability and reliability of the overall structure of the two-way vent valve 100. When combined with the configuration in which the first valve plate 121 and the second valve plate 123 are spaced apart along the axial direction of the gas passage 111, the overall structure of the two-way vent valve 100 is simplified, and the assembly and operation of each component is also simplified.

[0051] Those skilled in the art should understand that the illustrations are merely exemplary, and that in other embodiments, other structures or members may be employed to position the two-way valve assembly 120 within the gas passage 111. For example, a blocking structure or member may be provided at the first or second end of the gas passage 111, or other fixed structure or resilient member may be provided, to securely hold the two-way valve assembly 120 within the gas passage 111 and to securely position the first valve plate 121 and the second valve plate 123 of the two-way valve assembly 120 at a specific location within the gas passage 111 when the two-way valve assembly 120 closes the gas passage.

[0052] Please continue to refer to Figures 3, 7, and 9. In the specific embodiment shown in the figures, a first inclined surface 113 is provided on the edge of the blocking portion 112 facing the first sealant 125, and a corresponding second inclined surface (not shown) is provided on the edge of the first sealant 125, with the first inclined surface 113 sealingly connected to the second inclined surface. The inclined surface seals between the blocking portion 112 and the first sealant 125, increasing the sealing area between the blocking portion 112 and the first sealant 125 and improving the sealing effect, which is advantageous for matching the sizes of the first sealant 125 and the blocking portion 112. This is particularly advantageous in an embodiment in which the first sealant 125 is a packing (e.g., the specific embodiment shown in Figure 7).

[0053] 2, 7, and 8. In the specific embodiment shown in the figures, the two-way valve assembly 120 may further include an end cap 127 for connecting to the second valve plate 123. The end cap 127 is movably disposed at the first end of the gas passage 111, and the first elastic member 130 is located between the end cap 127 and the first valve plate 123.

[0054] The first valve plate 121 and the second valve plate 123 are disposed within the gas passage 111 along the axial direction of the gas passage 111, so that the first valve plate 121 faces and approaches the first end of the gas passage 111, and the second valve plate 123 faces and approaches the second end of the gas passage 111. By providing an end cap 127 and connecting it to the second valve plate 123 and positioning a first elastic member 130 between the end cap 127 and the first valve plate 121, the first elastic member 130 applies a force to the end cap 127 toward the first end of the gas passage 111, and therefore indirectly applies a force to the second valve plate 123 toward the first end of the gas passage 111. At the same time, the first elastic member 130 also applies a force to the first valve plate 121 toward the second end of the gas passage 111. In this manner, the first valve plate 121 and the second valve plate 123 of the two-way valve assembly 120 are brought closer to each other by the action of the first elastic member 130, thereby achieving the effect of closing the gas passage 111.

[0055] It should be understood by those skilled in the art that the illustrated example is merely a typical example, and that in other embodiments, the first elastic member 130 may apply other forms of force to the first valve plate 121 and the second valve plate 123 to move them toward each other and close the gas passage 111. For example, a separate end cap similar to the end cap 127 may be provided at the second end of the gas passage 111, and this separate end cap may be connected to the first valve plate 121, and the first elastic member 130 may be disposed between this separate end cap and the second valve plate 123. Alternatively, a blocking structure may be provided at each end of the gas passage 111, and the first elastic member 130 may include two elastic members. One of these is positioned between the blocking structure at the first end of the gas passage 111 and the first valve plate 121 and applies a force from the first end to the first valve plate 121 toward the second end, and the other is positioned between the blocking structure at the second end of the gas passage 111 and the second valve plate 123 and applies a force from the second end to the second valve plate 123 toward the first end, bringing the first valve plate 121 and the second valve plate 123 closer to each other and closing the gas passage 111. Alternatively, in other embodiments, other forms than those described above may be adopted.

[0056] In the illustrated embodiment, the end cap 127 has a disk-like structure whose cross section matches the cross section of the gas passage 111. The center of the end cap 127 is connected to the second valve plate 123. The end cap 127 further has a plurality of third through-holes 128 distributed in the circumferential direction, which are used to communicate between the first end of the gas passage 111 and the gas inside the gas passage 111. However, those skilled in the art should understand that the illustrated example is merely a typical example, and that in other embodiments, the end cap 127 may have other structures, and may be one or more, as long as it can restrict the first elastic member 130 between the end cap 127 and the first valve plate 121. For example, the end cap 127 may be disk-shaped, rectangular-shaped, or have another shape whose cross-sectional area is smaller than that of the gas passage 111, thereby realizing gas communication using the gap between the end cap 127 and the gas passage 111.

[0057] 5, 7, and 8. In some embodiments, the bidirectional valve assembly 120 may further include a connecting post 129 for connecting the end cap 127 and the second valve plate 123. One end of the connecting post 129 may be connected to the second valve plate 123 or may be integral with the second valve plate 123. The other end of the connecting post 129 is connected to the end cap 127. By connecting the second valve plate 123 to the end cap 127 using the connecting post 129, the bias of the first elastic member 130 to the second valve plate 123 via the end cap 127 can be transmitted along the axial direction of the gas passage 111, and the air pressure at both ends of the gas passage 111 can be transmitted in the same line as the force acting on the first valve plate 121 and the second valve plate 123. As a result, the first valve plate 121 and the second valve plate 123 can be forced in the axial direction, preventing jamming and ensuring the reliability and stability of the bidirectional vent valve 100.

[0058] In the specific embodiment shown in the figures, the connecting pillar 129 is integral with the second valve plate 123, which further simplifies the structure and facilitates assembly. The connecting pillar 129 is located in the center of the second valve plate 123, and a connecting hole for connecting to the connecting pillar 129 is correspondingly provided in the center of the end cap 127. This is adapted to the specific structure in this specific embodiment, in which the first through-hole 122 is located in the center of the first valve plate 121 and is coaxial with the gas passage 111, and the second through-hole 124 is provided in the second valve plate 123 along the circumferential direction of the gas passage 111. It should be understood by those skilled in the art that the illustrated example is merely a typical example, and that in other embodiments, the connecting pillar 129 may be one or more, and may be located in the center or on the periphery of the valve plate, depending on the specific structure and installation form of the first valve plate 121 and the second valve plate 123.

[0059] The connecting post 129 and the end cap 127 may be connected by a screw. For example, a screw hole may be provided at a corresponding position on the end cap 127, and the end of the connecting post 129 that connects to the end cap 127 may be provided with a screw thread. Because the first elastic member 130 is located between the end cap 127 and the second valve plate 123, connecting the end cap 127 and the connecting post 129 by a screw is advantageous for designing the elastic compression amount of the first elastic member 130 according to actual needs and improving the control accuracy of the exhaust and intake. Similarly, in the embodiment in which the connecting post 129 is connected to the first valve plate 121, the connecting post 129 and the first valve plate 121 may also be connected by a screw.

[0060] 2, 7, and 8. In some embodiments, the first elastic member 130 may be a first spring fitted to the connecting post 129. The first spring presses the first valve plate 121 and the second valve plate 123 together, providing a restoring driving force and preload to the first valve plate 121 and the second valve plate 123, thereby enhancing the closing effect of the gas passage 111 of the two-way valve assembly 120 and preventing inadvertent opening.

[0061] In the specific embodiment shown in the drawings, one end of the connecting post 129 is connected to the center of the second valve plate 123 and passes through the first through-hole 122 in the center of the first valve plate 121, and the other end is connected to the end cap 127. In this case, it is particularly advantageous to design the first elastic member 130 as a first spring that is fitted onto the connecting post 129. This has a simple structure, is easy to assemble, and the biasing force of the first spring is uniform and aligned with the axis of the gas passage 111, which can prevent the two-way vent valve 100 from getting stuck during operation.

[0062] Those skilled in the art should understand that the illustrated example is merely a typical example, and that in other embodiments, the first elastic member 130 may have other structures, be located in other positions, or may be one or more. For example, the first elastic member 130 may be a bellows, a rubber elastomer, a metal piece, etc. Depending on the specific structures of the first elastic member 130 and the two-way valve assembly 120, the position and number of the first elastic member 130 may be other designs.

[0063] In some embodiments, the two-way vent valve 100 of the present application may also function as an explosion-proof valve.

[0064] Please continue to refer to Figures 1, 2, and 6 to 9. In the specific embodiment shown in the figures, the two-way vent valve 100 may further include a mounting seat 140, a third valve plate 150, and a second elastic member 160. The mounting seat 140 is mounted on the valve seat 110 and is movable relative to the valve seat 110, with a pressure relief passage 141 defined in the mounting seat 140. The third valve plate 150 is fixed to the valve seat 110 and is located at the second end of the gas passage 111, for opening or closing the pressure relief passage 141 in response to movement of the valve seat 110 relative to the mounting seat 140. The second elastic member 160 is for applying a force to the third valve plate 150 to close the pressure relief passage 141. Therefore, when the air pressure at the first end of the gas passage 111 is greater than the air pressure at the second end, and this air pressure difference reaches a second threshold, the third valve plate 150 can overcome the force of the second elastic member 160 and open the pressure release passage 141. Here, the second threshold is greater than the first threshold.

[0065] The two-way vent valve 100 provided in this embodiment of the present application includes a mounting seat 140 that is movable relative to the valve seat 110, a pressure relief passage 141 formed in the mounting seat 140, and a third valve plate 150 at the second end of the gas passage 111, which is fixed to the valve seat 110, is biased by a second elastic member 160 to close the pressure relief passage 141, thereby achieving the combined functions of an explosion-proof valve and a two-way vent valve. In this embodiment, the third valve plate 150 is a one-way explosion-proof valve plate. Gas at the first end of the gas passage 111 acts on the third valve plate 150 through the pressure relief passage 141, exerting a force on the third valve plate 150 toward the second end. Gas at the second end of the gas passage 111 acts directly on the third valve plate 150, exerting a force on the third valve plate 150 toward the first end.

[0066] When the air pressure at the first end of the gas passage 111 is greater than the air pressure at the second end, and this air pressure difference reaches a second threshold, the third valve plate 150 is driven by this air pressure difference to overcome the force of the second elastic member 160 and move together with the valve seat 110 relative to the mounting seat 140, opening the pressure relief passage 141 and allowing the gas at the first end of the gas passage 111 to be discharged to the second end through the pressure relief passage 141, thereby achieving the pressure relief function. This second threshold is the limit value of the explosion-proof air pressure and is greater than the first threshold value which defines the balanced ventilation limit value. After this pressure release process, the air pressure at the first end of the gas passage 111 decreases, and when the air pressure difference with the second end becomes less than the second threshold, this air pressure difference becomes insufficient to counter the force of the second elastic member 160, and the restoring force of the second elastic member 160 acting on the third valve plate 150 causes the third valve plate 150 to move together with the valve seat 110 relative to the mounting seat 140, restoring the closure of the pressure release passage 141.

[0067] Please continue to refer to Figures 2 and 6 to 9. In the specific embodiment shown in the figures, the valve seat 110 is attached to the center of the mounting seat 140. Specifically, a mounting hole 142 is provided in the center of the mounting seat 140, and the valve seat 110 is fitted into the mounting hole 142 and can move relative to the mounting seat 140 along the axial direction of the gas passage 111.

[0068] In the two-way vent valve 100 of the embodiment of the present application, the valve seat 110 and the mounting seat 140 are arranged coaxially, and during the intake / exhaust balancing process and the explosion-proof pressure relief process, the movement direction of the two-way valve assembly 120 and the third valve plate 150 also coincides with the axial direction of the gas passage 111. Furthermore, during the pressure relief process, both the gas passage 111 and the pressure relief passage 141 can be used simultaneously, greatly improving the pressure relief efficiency.

[0069] Please continue to refer to Figure 2. In the specific embodiment shown in the figure, the pressure relief passages 141 may be provided along the circumferential direction of the gas passage 111. For example, as shown in the figure, four pressure relief passages 141 may be provided evenly spaced along the circumferential direction. This allows the force received by the third valve plate 150 during the explosion-proof pressure relief process of the two-way vent valve 100 to be evenly distributed, so that the third valve plate 150 can reliably move along the axial direction of the gas passage 111, making the explosion-proof pressure relief process stable and reliable.

[0070] In some embodiments, the third valve plate 150 may be an annular valve plate that corresponds to the cross-sectional shape of the mounting seat 140. This annular valve plate is fixed to the second end of the gas passage 111 of the valve seat 110, and closes the pressure relief passage 141 that is provided in the mounting seat 140 along the circumferential direction of the gas passage 111. In addition, the central opening of the annular valve plate corresponds to the position of the gas passage 111 so as not to disturb the intake / exhaust balance of the gas passage 111.

[0071] In another embodiment, the third valve plate 150 may further include a semi-permeable membrane 151 disposed in the center of the annular valve plate. The semi-permeable membrane 151 has waterproof, dustproof, and breathable functions. When the semi-permeable membrane 151 is fixed to the second end of the gas passage 111 of the valve seat 110, when the two-way vent valve 100 of the present embodiment is applied to a battery, it can provide the battery with additional waterproof and dustproof functions and prevent damage to or impact on the battery function caused by water or dust entering the battery through the gas passage 111.

[0072] In some embodiments, in order to improve the sealing effect of the third valve plate 150 with respect to the pressure relief passage 141, a second seal 171 may be further provided between the third valve plate 150 and the mounting seat 140 on the side facing the second end of the gas passage 111. Similar to the above description of the first seal 125, the second seal 171 may also be a packing or a sealing ring, and a groove may be provided at a corresponding position on the mounting seat 140, into which the second seal 171 is fixed, with a portion of the second seal 171 protruding from the groove to make elastic contact with the third valve plate 150.

[0073] Please continue to refer to Figures 1, 2, and 6 to 9. In the specific embodiment shown in the figures, the second elastic member 160 is a second spring provided between the valve seat 110 and the mounting seat 140, and is intended to apply a force to the valve seat 110 and the mounting seat 140, pressing the third valve plate 150 from the second end of the gas passage 111 toward the mounting seat 140, in order to close the pressure release passage 141. For this purpose, a restricting portion 114 may be provided on the outer periphery of the valve seat 110 near the first end of the gas passage 111, and correspondingly, a mounting groove 144 may be further provided on the side of the mounting seat 140 facing the first end of the gas passage 111. The mounting groove 144 is provided to surround the mounting hole 142. In this way, the second spring is fitted to the outer wall of the valve seat 110.

[0074] The second elastic member 160 is provided as a second spring fitted to the outer periphery of the valve seat 110, and the elastic restoring force provided by the second spring is also coaxial with the gas passage 111, so that the two-way ventilation valve 100 of the embodiment of the present application further receives a uniform force during the explosion-proof pressure relief process.

[0075] In some embodiments, when the two-way vent valve 100 of the present invention is applied to a battery, the two-way vent valve 100 may further include a third sealant 172 to ensure a sealing effect with the battery case. Please refer to FIGS. 2 and 6 to 9 again. In the specific embodiment shown in the figures, the third sealant 172 may be provided on the mounting seat 140 closer to the first end of the gas passage 111. This is because, when the two-way vent valve 100 is applied to a battery, the first end is one end located inside the battery case, and the second end is one end located outside the battery case.

[0076] Similar to the above description of the first seal 125 and the second seal 171, the third seal 172 may also be a packing or a sealing ring, or may have a groove formed at a corresponding position on the mounting seat 140 into which the third seal 172 is fixed, with a portion of the third seal 172 protruding from the groove to elastically contact the battery case. Those skilled in the art should understand that the illustrated example is merely a typical example, and that in other embodiments, the third seal 172 may have a different structure or be located at a different position, such as on the valve seat 110. This is particularly advantageous in situations where the two-way vent valve 100 does not have an explosion-proof pressure relief function and therefore does not have a mounting seat 140.

[0077] In some embodiments, when the two-way vent valve 100 of the present invention is applied to a battery, a fastening structure may be provided on the two-way vent valve 100 to facilitate fastening the two-way vent valve 100 to the battery case. The fastening structure may be, for example, a screw hole 143 provided in the mounting seat 140, allowing the two-way vent valve 100 to be fastened to the battery case with a screw. Those skilled in the art should understand that the illustrated structure is merely a typical example, and that in other embodiments, the fastening structure is not limited thereto and other fastening forms may be used. The fastening structure may also be provided at other locations. For example, the fastening structure may be provided on the valve seat 110 or connected to the valve seat 110. This is particularly advantageous in situations where the two-way vent valve 100 does not have an explosion-proof pressure relief function and therefore does not have a mounting seat 140.

[0078] In some embodiments, a protective cover 180 may be further provided on the two-way vent valve 100 to protect the two-way vent valve 100 of the embodiments of the present application. The protective cover 180 may be provided on the two-way vent valve 100 closer to the second end of the gas passage 111. In this way, when the two-way vent valve 100 is applied to a battery, the protective cover 180 can be disposed on the exterior side of the battery to protect other structures inside, such as the valve seat 110, two-way valve assembly 120, and third valve plate 150. A gap should be left between the protective cover 180 and the valve seat 110 or the mounting seat 140 so as not to block the gas passage 111 and the pressure relief passage 141 and not to affect the two-way vent function and explosion-proof pressure relief function of the two-way vent valve 100.

[0079] See Figures 2 and 6 to 9. As shown in the figures, protective cover 180 may be provided on mounting seat 140 at the outermost side of two-way vent valve 100 near the second end of gas passage 111 to protect other internal structures.

[0080] Please refer to the accompanying Figures 10 to 12, which respectively show a cross-sectional structure of a two-way vent valve 100 according to a specific embodiment of the present invention during exhaust, intake, and explosion-proof pressure relief. The following description will be given with reference to the application of the two-way vent valve 100 to a battery.

[0081] As shown in FIG. 10, when the air pressure at the first end of the gas passage 111 is greater than the air pressure at the second end, i.e., when the air pressure inside the battery is greater than the air pressure outside, and this air pressure difference is greater than the first threshold and less than the second threshold, the two-way vent valve 100 starts the exhaust process.

[0082] Driven by the higher air pressure inside the battery, gas inside the battery flows along the gas passage 111 through the first through-hole 122 of the first valve plate 121, urging the second valve plate 123 toward the outside of the battery. Under this force, the second valve plate 123 overcomes the force of the first spring and moves toward the second end along the axis of the gas passage 111, separating from the blocking portion 112 on the inner wall of the valve seat 110 and the first seal member 125, thereby opening the gas passage 111. At this time, the first spring is in a compressed state. Gas inside the battery is discharged along the gas passage 111, as indicated by the direction of the white arrow in FIG. 10. When the air pressure difference between both ends of the gas passage 111 returns to below the first threshold, the second valve plate 123 moves along the axial direction of the gas passage 111 toward the first end due to the action of the restoring force of the first spring, and is again pressed against the blocking portion 112 on the inner wall of the valve seat 110, elastically contacting the first sealing material 125, and closing the gas passage 111 again.

[0083] As shown in FIG. 11, when the air pressure at the first end of the gas passage 111 is lower than the air pressure at the second end, i.e., the air pressure inside the battery is lower than the air pressure outside, and this air pressure difference is greater than a first threshold, the two-way vent valve 100 starts the intake stroke.

[0084] Driven by the higher air pressure outside the battery, gas outside the battery flows along the gas passage 111 through the second through-hole 124 of the second valve plate 123, urging the first valve plate 121 toward the inside of the battery. Under this force, the first valve plate 121 overcomes the force of the first spring and moves toward the first end along the axis of the gas passage 111, separating from the blocking portion 112 on the inner wall of the valve seat 110 and opening the gas passage 111. At this time, the first spring is in a compressed state. Gas outside the battery then enters the battery along the gas passage 111, as indicated by the direction of the white arrow in FIG. 11 . When the air pressure difference between both ends of the gas passage 111 returns to below the first threshold, the first valve plate 121 moves along the axial direction of the gas passage 111 toward the second end due to the action of the restoring force of the first spring, and is again pressed against the blocking portion 112 on the inner wall of the valve seat 110, and the first sealing material 125 again elastically contacts the second valve plate 123, closing the gas passage 111.

[0085] As shown in FIG. 12, when the air pressure at the first end of the gas passage 111 is greater than the air pressure at the second end, i.e., when the air pressure inside the battery is greater than the air pressure outside, and this air pressure difference reaches a second threshold, the two-way ventilation valve 100 starts the explosion-proof pressure release process.

[0086] When the pressure difference between the inside and outside of the battery reaches the explosion-proof threshold (second threshold), the gas inside the battery flows directly through the pressure relief passage 141 and acts on the third valve plate 150, pushing it toward the outside of the battery. Under this force, the third valve plate 150 overcomes the force of the second elastic member 160 (here, the second spring) and moves toward the second end along the axis of the gas passage 111, separating from the mounting seat 140 and the second seal member 171 and opening the pressure relief passage 141. At this time, the second spring is in a compressed state. The gas inside the battery is rapidly discharged along the pressure relief passage 141, as indicated by the direction of the black arrows in FIG. 12 . At the same time, the gas inside the battery continues to flow along the gas passage 111, passing through the first through-hole 122 of the first valve plate 121 and biasing the second valve plate 123, pushing it toward the outside of the battery. Under this acting force, the second valve plate 123 simultaneously overcomes the force of the first spring and moves along the axis of the gas passage 111 toward the second end, separating from the blocking portion 112 on the inner wall of the valve seat 110 and the first sealant 125, thereby opening the gas passage 111. At this time, the first spring is still in a compressed state. At the same time, gas inside the battery is also discharged along the gas passage 111, as indicated by the direction of the white arrow in FIG. 12.

[0087] In this situation, the gas inside the battery is simultaneously discharged along both the pressure relief passage 141 and the gas passage 111, allowing the air pressure inside the battery to drop below the second threshold (i.e., the explosion-proof threshold) more quickly, thereby improving the safety of the battery. The third valve plate 150, together with the valve seat 110, moves along the axial direction of the gas passage 111 toward the first end due to the action of the restoring force of the second spring, and is again pressed against the mounting seat 140, elastically contacting the second sealant 171 and again closing the pressure relief passage 141. At this time, the gas passage 111 may be left open, and the air pressure inside and outside the battery may continue to be adjusted until the air pressure inside and outside the battery is balanced (i.e., becomes smaller than the first threshold).

[0088] The two-way vent valve 100 according to the embodiment of the present application is particularly applicable to a battery. According to another aspect of the embodiment of the present application, a battery 200 is further provided. Please refer to the attached FIG. 13, which shows a schematic diagram of the three-dimensional structure of the battery 200 according to yet another embodiment of the present application.

[0089] As shown in the figure, the battery 200 comprises a case 210 and a battery cell housed in the case 210. (not shown) and the two-way vent valve 100 according to the above embodiment of the present application. The two-way vent valve 100 is fixed to the case 210, and a first end of a gas passage 111 is provided toward the inside of the case 210, and a second end of the gas passage 111 is provided toward the outside of the case 210.

[0090] As mentioned above, in some embodiments, two-way vent valve 100 may be secured to case 210 of battery 200 by a securing structure on two-way vent valve 100, such as threaded holes 143 located on mounting seat 140. In some embodiments, third sealant 172 provided on two-way vent valve 100 may be used to ensure a seal between two-way vent valve 100 and case 210 of battery 200.

[0091] According to a further aspect of the present embodiment, there is further provided a power consuming device 300. The power consuming device includes the above-mentioned battery 200, which is for supplying electrical energy to the power consuming device 300. Please refer to Fig. 14, which shows a schematic structure of the power consuming device 300 according to yet another embodiment of the present application.

[0092] In the illustrated embodiment, the power consuming device 300 may be, for example, a vehicle. The vehicle may be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle may be an electric vehicle, a hybrid vehicle, an extended-range electric vehicle (EREV), or the like. A battery 200 may be provided inside the vehicle, or at the bottom, front, or rear of the vehicle. The vehicle includes a motor 310, a controller 320, and the battery 200 for supplying electrical energy to the vehicle. The controller 320 controls the battery 200 to power the motor 310, thereby driving the motor 310 and thereby driving the wheels or other components of the vehicle. Of course, the illustrated example is merely a typical example. In other embodiments, the power consuming device 300 may be any device that includes the battery 200 and receives electrical energy from the battery 200, such as a mobile phone, a portable device, a laptop computer, an electric motorcycle, an electric vehicle, a steamship, a spacecraft, an electric toy, or a power tool.

[0093] It should be noted that unless otherwise explained, technical or scientific terms used in the examples of this application shall have the ordinary meaning as understood by a person skilled in the art to which the examples of this application belong.

[0094] In the description of the embodiments of the present application, the technical terms "center," "longitudinal direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," Orientations or positional relationships indicated by terms such as "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. are based on the orientations or positional relationships shown in the accompanying drawings and are intended merely to facilitate and simplify the description of the embodiments of the present application, and do not indicate or imply that the devices or elements shown must have a particular orientation, be configured, or operate in a particular orientation, and therefore should not be understood as limitations on the embodiments of the present application.

[0095] Additionally, terms such as "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or the number of technical features shown. In the description of the embodiments of this application, "plurality" means two or more unless clearly and specifically limited otherwise.

[0096] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "attached," "coupled," "connected," "fixed," etc. should be understood in a broad sense. For example, they may be fixedly connected, detachably connected, or integrally formed. They may be mechanically connected or electrically connected. They may be directly connected, indirectly connected via an intermediate medium, or may be a communication relationship between two elements or an interaction relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application depending on the specific circumstances.

[0097] In the description of the embodiments of the present application, unless otherwise clearly stated and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact with each other, or that the first and second features are in indirect contact with each other via an intermediate medium. Furthermore, a first feature being "on," "above," or "on top" of a second feature may mean that the first feature is directly above or diagonally above the second feature, or may simply mean that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or may simply mean that the horizontal height of the first feature is lower than that of the second feature.

[0098] Finally, it should be noted that the above embodiments are merely for illustrating the technical solutions of the present application, and are not intended to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified or some or all of the technical features may be equivalently substituted, provided that such modifications or substitutions do not deviate from the spirit of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present application, and all such modifications or substitutions should be included within the scope of the claims and description of the present application. In particular, all technical features described in the embodiments may be combined in any form as long as there is no structural contradiction. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims. [Explanation of symbols]

[0099] 100 Two-way vent valve 110 Valve seat 111 Gas passage 112 Blocking part 113 First Slope 114 Regulatory Department 120 Two-way valve assembly 121 1st valve plate 122 First through hole 123 2nd valve plate 124 Second through hole 125 First sealing material 126 Groove 127 End Cap 128 Third Through Hole 129 Connecting Pillar 130 First elastic member 140 Mounting seat 141 Pressure relief passage 142 Mounting hole 143 screw hole 144 Mounting groove 150 3rd valve plate 151 Semi-permeable membrane 160 second elastic member 171 Second sealing material 172 Third sealing material 180 Protective Cover 200 batteries 210 cases 300 Power consumption equipment 310 Motor 320 Controller

Claims

1. a valve seat for forming a gas passageway having a first end and a second end; a two-way valve assembly movably provided in the gas passage, the two-way valve assembly including a first valve plate and a second valve plate, the first valve plate having a first through-hole and the second valve plate having a second through-hole, the first through-hole and the second through-hole being spaced apart from each other when projected in an axial direction of the gas passage; a first elastic member, wherein an urging end of the first elastic member abuts against the first valve plate or the second valve plate to apply a force to the first valve plate and / or the second valve plate to move the first valve plate and the second valve plate closer to each other, in order to close the gas passage, and wherein, when a pressure difference between the first end and the second end of the gas passage reaches a first threshold value, the first valve plate is configured to move toward the first end to open the gas passage, or the second valve plate is configured to move toward the second end to open the gas passage, a blocking portion is provided on an inner wall of the gas passage, the first valve plate and the second valve plate are provided on both sides of the blocking portion in the axial direction of the gas passage, the first valve plate is located on a side of the blocking portion closer to the first end, and the second valve plate is located on a side of the blocking portion closer to the second end, the two-way valve assembly further includes an end cap, the end cap being movably disposed at the first end of the gas passage, the end cap being for connecting with the second valve plate, and the first elastic member being positioned between the end cap and the first valve plate.

2. 2. The two-way vent valve according to claim 1, wherein the first valve plate and the second valve plate are provided coaxially with the gas passage, and one of the first through hole and the second through hole is provided coaxially with the gas passage, and the other is provided along a circumferential direction of the gas passage.

3. 3. The two-way vent valve according to claim 2, wherein the two-way valve assembly further includes a first seal, the first seal being provided on the first valve plate and / or the second valve plate, and when the two-way valve assembly closes the gas passage, the first seal is located between the first valve plate and the second valve plate, separating the first through-hole from the second through-hole.

4. 4. The two-way vent valve according to claim 3, wherein a groove is provided in the first valve plate and / or the second valve plate, and the first seal is fixed to the groove and protrudes from the groove.

5. 4. The two-way vent valve according to claim 3, wherein a first inclined surface is provided on an edge of the blocking portion facing the first sealing material, a second inclined surface is provided on an edge of the first sealing material, and the first inclined surface is sealingly connected to the second inclined surface.

6. 2. The two-way vent valve of claim 1, wherein the two-way valve assembly further includes a connecting post for connecting the end cap and the second valve plate.

7. The two-way vent valve according to claim 6, wherein the first elastic member is a first spring fitted to the connecting post.

8. a mounting seat movably provided on the valve seat and having a pressure relief passage; a third valve plate fixed to the valve seat and located at the second end of the gas passage, for opening or closing the pressure release passage by movement of the valve seat relative to the mounting seat; a second elastic member for applying a force to the third valve plate to close the pressure release passage, the second elastic member being configured so that when the air pressure at the first end of the gas passage is greater than the air pressure at the second end and the air pressure difference reaches a second threshold, the third valve plate overcomes the force of the second elastic member to open the pressure release passage; and further comprising The two-way vent valve of claim 1 , wherein the second threshold value is greater than the first threshold value.

9. 9. The two-way vent valve according to claim 8, wherein a mounting hole is provided in the center of the mounting seat, and the valve seat is fitted into the mounting hole.

10. 10. The two-way vent valve according to claim 9, wherein the pressure release passage is provided along the circumferential direction of the gas passage.

11. 10. The two-way vent valve according to claim 9, wherein a mounting groove surrounding the mounting hole is provided on a side of the mounting seat facing the first end, a restricting portion is provided on an outer periphery of the valve seat near the first end, and the second elastic member is a second spring provided between the mounting groove and the restricting portion.

12. A battery; a case for accommodating the unit cells; 12. The two-way vent valve according to claim 1, wherein the first end of the gas passage is provided toward the inside of the case, and the second end of the gas passage is provided toward the outside of the case. A battery comprising:

13. 13. A power consuming device comprising the battery of claim 12 for providing electrical energy.

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