Water stop valve, battery valve device and battery

Abstract

The water stop valve comprises a shell, a valve rod and an elastic component, the shell is provided with an inner cavity and a valve hole communicated with the inner cavity and the external space, the valve rod penetrates through the valve hole and comprises a sealing plug located on the side, away from the inner cavity, of the valve hole and a floating body connected to the sealing plug, and the elastic component is arranged on the floating body. The rod body is connected to the sealing plug, and the elastic component is connected with the rod body and the shell; a first interval can be formed between the sealing plug and the hole wall of the valve hole and communicates with the inner cavity and the external space. The sealing plug can be attached to the hole wall of the valve hole so as to seal the valve hole. The water stop valve and the battery valve device are applied to the battery, and by arranging the water stop valve, when the battery is soaked in water, the sealing plug can seal the valve hole, so that water is prevented from entering the inner cavity of the battery, and short circuit of the battery caused by water is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a water stop valve, a battery valve device and a battery. Background Art

[0002] With the development of society, batteries have played an increasingly important role in human production and life. They are widely used in various fields and have become an indispensable energy storage device in human daily life. The internal circuits of the battery are generally sealed at a low level or directly exposed to the outside. Therefore, the battery shell generally adopts a sealed structure to prevent dust, water vapor, liquid, etc. from invading and causing short circuits on the exposed circuits, which will reduce and damage the battery performance. However, as the battery is used, it will face a variety of abnormal situations. When the battery is soaked in water, it is necessary to prevent water from directly or through infiltration into the inner cavity of the battery, causing an internal short circuit. Utility Model Content

[0003] The purpose of the utility model is to propose a water stop valve, a battery valve device and a battery, aiming to solve the problem that when the battery is soaked in water, it is necessary to prevent water from entering the inner cavity of the battery under the action of water pressure or infiltration, causing an internal short circuit.

[0004] In a first aspect, the utility model provides a water stop valve, the water stop valve comprising a housing, a valve stem and an elastic component, the housing being provided with an inner cavity and a valve hole communicating the inner cavity with an external space, the valve stem being passed through the valve hole, the valve stem comprising a sealing plug located at a side of the valve hole away from the inner cavity, a float connected to the sealing plug, and a rod body connected to the sealing plug, the elastic component connecting the rod body and the housing;

[0005] The sealing plug can form a first gap with the hole wall of the valve hole, and the first gap connects the inner cavity and the external space; the sealing plug can also fit the hole wall of the valve hole to seal the valve hole.

[0006] In one embodiment, the shell is further provided with an outer cavity, and the valve hole is communicated with the external space through the outer cavity.

[0007] In one embodiment, the sealing plug is in a truncated cone shape, and the valve hole is a tapered hole adapted to the sealing plug;

[0008] Wherein, the radial dimension of the tapered hole gradually increases from the inner cavity to the outer cavity.

[0009] In one embodiment, the valve stem further includes a mounting end, the rod body connects the mounting end and the sealing plug, the elastic component is sleeved on the rod body and elastically abuts between the mounting end and the cavity wall of the inner cavity.

[0010] In a second aspect, the utility model further provides a battery valve device, which includes a two-way pressure relief valve and a water stop valve of any of the above-mentioned embodiments, and the battery valve device is provided with a first space, and the two-way pressure relief valve and the water stop valve are sequentially spaced apart in the first space.

[0011] In one embodiment, the battery valve device further includes an explosion-proof valve, and the battery valve device is further provided with a second space, the explosion-proof valve is provided in the second space, and the first space and the second space are respectively used to communicate with the battery inner cavity and the external space;

[0012] The explosion-proof valve comprises a valve seat and a valve plate, the valve seat is provided with a first opening, and the valve plate is configured to open or close the first opening;

[0013] The two-way pressure relief valve comprises a valve body and a valve core, wherein the valve body is provided with a first channel, and a first side hole and a second side hole connected with the first channel, and the valve core is configured to open or close the first side hole, or the valve core is configured to open or close the second side hole;

[0014] Wherein, the valve hole and the first opening can both be communicated with the external space, and the second side hole is communicated with the external space through the inner cavity and the valve hole in sequence.

[0015] In one embodiment, the valve core is disposed in the first channel, and the valve core includes a baffle, a valve sheet and an elastic element;

[0016] The valve plate is connected to one side of the baffle plate, a first gas path is formed between the baffle plate and the valve plate; a second gas path is formed between the valve plate and the first channel; at least one of the first gas path and the second gas path is in a closed state, and the first gas path and the second gas path are both connected to the first channel and the second side hole;

[0017] Two ends of the elastic element are respectively connected to the first channel and the baffle plate to drive the baffle plate and the valve plate to close the second air path.

[0018] In one embodiment, a first through hole is formed on the baffle plate, and a second through hole is formed on the valve plate, wherein a projection of the second through hole relative to the baffle plate does not overlap with the first through hole;

[0019] The valve sheet is deformed to form the first gas path between the baffle and the valve sheet, and the first gas path connects the first through hole and the second through hole.

[0020] In one embodiment, an annular stop surface is formed in the first channel at the second side hole, and the elastic element can push the baffle to abut the valve plate so that the circumferential edge of the valve plate abuts against the annular stop surface; the valve plate can move away from the second side hole so that a second air path is formed between the circumferential edge of the valve plate and the annular stop surface, and the second air path connects the first side hole and the second side hole; and / or,

[0021] The baffle plate is provided with a boss structure, which is inserted into the second through hole. The first through hole is provided with a plurality of boss structures and is distributed at intervals in the circumferential direction of the boss structure. The baffle plate is provided with an annular protrusion, which is arranged around the second through hole and is located between the boss structure and each of the first through holes.

[0022] In a third aspect, the utility model further provides a battery, comprising a housing, a battery module and a battery valve device according to any one of the above embodiments, wherein the battery module is arranged in the housing, and the battery valve device is arranged on the housing.

[0023] The following beneficial effects are achieved by using the embodiments of the present invention:

[0024] The water stop valve, battery valve device and battery of the utility model are adopted, and the water stop valve and battery valve device are applied to the battery. By setting the water stop valve, when the battery is soaked in water, the sealing plug can seal the valve hole, thereby preventing water from entering the battery cavity, so as to prevent the battery from short-circuiting due to water. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] in:

[0027] Figure 1 Schematic diagram of a battery valve device in one embodiment.

[0028] Figure 2 for Figure 1 A schematic diagram of the battery valve device shown in another angle.

[0029] Figure 3 for Figure 1 A side view of the battery valve assembly is shown.

[0030] Figure 4 for Figure 3 Middle AA section view.

[0031] Figure 5 for Figure 4 Enlarged schematic diagram of part B in the middle.

[0032] Figure 6 for Figure 4 Enlarged schematic diagram of part C in the middle.

[0033] Figure 7 for Figure 5 The schematic diagram of the two-way pressure relief valve forming the first gas path is shown.

[0034] Figure 8 for Figure 5 The schematic diagram of the two-way pressure relief valve forming the second gas path is shown.

[0035] Fig. 9 for Figure 5 Schematic diagram of the baffle in the two-way pressure relief valve shown.

[0036] Fig.10 for Figure 5 Schematic diagram of the valve plate in the two-way pressure relief valve shown.

[0037] Fig.11 for Figure 6 Schematic diagram of the valve hole closure in the water stop valve shown.

[0038] Fig.12 for Figure 6 Schematic diagram of the valve stem in the water stop valve shown.

[0039] Fig.13 for Figure 1 Schematic diagram of the explosion-proof valve in the battery valve device shown in the open state.

[0040] Fig.14 for Fig.13 A cross-sectional view of the battery valve device with the explosion-proof valve in the open state is shown.

[0041] Fig.15 It is a schematic diagram of a first state of a water stop valve immersed in water in one embodiment.

[0042] Fig.16 It is a schematic diagram of a second state of the water stop valve immersed in water in one embodiment.

[0043] Fig.17 It is a schematic diagram of a third state of a water stop valve immersed in water in an embodiment.

[0044] Reference numerals: 100, two-way pressure relief valve; 110, valve body; 111, first channel; 112, first side hole; 113, second side hole; 114, annular stop surface; 120, valve core; 121, baffle; 1211, first through hole; 1212, convex column structure; 1213, annular protrusion; 122, valve plate; 1221, second through hole; 123, elastic element; 101, first gas path; 102, second gas path;

[0045] 200, water stop valve; 210, housing; 211, inner cavity; 212, valve hole; 213, outer cavity; 214, second opening; 220, valve stem; 221, sealing plug; 222, float; 223, rod body; 224, mounting end; 230, elastic member; 201, first interval; 202, second interval;

[0046] 300, explosion-proof valve; 310, valve seat; 311, first opening; 320, valve plate; 330, sealing ring; 340, explosion-proof spring. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0050] The utility model embodiment discloses a battery, see Figures 1 to 17The battery includes a shell, a battery module and a battery valve device. The battery module is arranged in the shell, and the battery valve device is arranged on the shell. In this embodiment, the battery valve device includes a water stop valve 200, which includes a shell 210, a valve stem 220 and an elastic component 230. The shell 210 is provided with an inner cavity 211 and a valve hole 212 connecting the inner cavity 211 and the external space. The valve stem 220 is penetrated by the valve hole 212. The valve stem 220 includes a sealing plug 221 located on the side of the valve hole 212 away from the inner cavity 211, a float 222 connected to the sealing plug 221, and a rod body 223 connected to the sealing plug 221. The elastic component 230 connects the rod body 223 and the shell 210; the sealing plug 221 can form a first gap 201 with the hole wall of the valve hole 212, and the first gap 201 connects the inner cavity 211 and the external space; the sealing plug 221 can also fit the hole wall of the valve hole 212 to seal the valve hole 212.

[0051] It is understandable that when the battery is soaked in water, please refer to Fig.11 The sealing plug 221 can seal the valve hole 212, thereby preventing water from entering the battery cavity and preventing the battery from short-circuiting due to water.

[0052] When the battery is not submerged in water, a first gap 201 is formed between the sealing plug 221 and the hole wall of the valve hole 212 , and gas flows freely on both sides of the water stop valve 200 .

[0053] In one embodiment, see Figure 4 , Figure 6 , Fig.11 and Fig.12 The housing 210 is further provided with an outer cavity 213, and the valve hole 212 is communicated with the external space through the outer cavity 213. By such a configuration, the float 222 can be placed in the outer cavity 213, and when the battery is soaked in water, the water will flow into and fill the outer cavity 213.

[0054] Furthermore, in this embodiment, the sealing plug 221 is in a truncated cone shape, and the valve hole 212 is a tapered hole adapted to the sealing plug 221, and the radial dimension of the tapered hole gradually increases from the inner cavity 211 to the outer cavity 213. With such an arrangement, when the battery is soaked in water, the sealing plug 221 fits on the hole wall of the tapered hole to seal the sealing valve hole 212, thereby preventing water from entering the inner cavity of the battery, and preventing the battery from short-circuiting due to water.

[0055] Specifically, the valve stem 220 further includes a mounting end 224, a rod body 223 connecting the mounting end 224 and the sealing plug 221, and an elastic component 230 sleeved on the rod body 223 and elastically abutting between the mounting end 224 and the cavity wall of the inner cavity 211. Of course, in other embodiments, the float 222 can also be directly exposed outside the battery valve device.

[0056] In one embodiment, the battery valve device further includes a two-way pressure relief valve 100, and the battery valve device is provided with a first space, and the two-way pressure relief valve 100 and the water stop valve 200 are sequentially arranged in the first space, so as to limit the gas flow direction of the two-way pressure relief valve 100 and the water stop valve 200 to be in a series relationship, that is, the two-way pressure relief valve 100 and the water stop valve 200 constitute a series system. Therefore, when the battery encounters water, the water stop valve 200 can prevent the liquid from contacting the two-way pressure relief valve 100, so as to prevent the two-way pressure relief valve 100 from opening and causing the liquid to enter the battery cavity.

[0057] By setting up the two-way pressure relief valve 100, when the gas pressure in the battery cavity is too high or too low compared to the atmospheric pressure in the external space, the two-way pressure relief valve 100 can automatically open to connect the battery cavity and the external space to balance the gas pressure in the battery cavity and the atmospheric pressure in the external space; when the gas pressure in the battery cavity and the atmospheric pressure in the external space reach a pressure balance, the two-way pressure relief valve 100 can automatically close to block the battery cavity and the external space to prevent external dust and water vapor from entering the battery.

[0058] In one embodiment, see Figure 4 , Fig.13 and Fig.14 The battery valve device also includes an explosion-proof valve 300. The battery valve device is also provided with a second space. The explosion-proof valve 300 is arranged in the second space. The first space and the second space are respectively used to connect the battery cavity and the external space, thereby limiting the gas flow direction of the series system and the explosion-proof valve 300 to be in a parallel relationship, and the integration is high.

[0059] By providing the explosion-proof valve 300 , when the gas pressure in the battery cavity is suddenly too high, the explosion-proof valve 300 can be opened in time, and the gas or liquid in the battery cavity can be discharged outward with a larger flow rate than the two-way pressure relief valve 100 .

[0060] Furthermore, in the present embodiment, the explosion-proof valve 300 includes a valve seat 310 and a valve plate 320, the valve seat 310 is provided with a first opening 311, and the valve plate 320 is configured to open or close the first opening 311; the two-way pressure relief valve 100 includes a valve body 110 and a valve core 120, the valve body 110 is provided with a first channel 111, and a first side hole 112 and a second side hole 113 connected to the first channel 111, the valve core 120 is configured to open or close the first side hole 112, or the valve core 120 is configured to open or close the second side hole 113; in the present embodiment, the valve hole 212 and the first opening 311 can both be connected to the external space, and the second side hole 113 is connected to the external space through the inner cavity 211 and the valve hole 212 in sequence.

[0061] It can be understood that when the valve stem 220 of the water stop valve 200 is configured to open the valve hole 212, the second side hole 113 of the two-way pressure relief valve 100 is connected to the external space through the inner cavity 211 and the valve hole 212 in sequence, so as to balance the gas pressure in the battery cavity and the atmospheric pressure in the external space. When the valve core 120 of the two-way pressure relief valve 100 is configured to close the first side hole 112, or the valve core 120 is configured to close the second side hole 113, the two-way pressure relief valve 100 can automatically close and block the battery cavity and the external space to prevent external dust and water vapor from entering the battery. When the battery encounters water, the valve stem 220 of the water stop valve 200 can also be configured to close the valve hole 212 to prevent liquid from contacting the two-way pressure relief valve 100, so as to avoid the two-way pressure relief valve 100 from opening and causing liquid to enter the battery cavity.

[0062] When the gas pressure in the battery cavity is suddenly too high, the valve plate 320 of the explosion-proof valve 300 can open the first opening 311, and the explosion-proof valve 300 can be opened in time to allow the gas or liquid in the battery cavity to leak out at a larger flow rate than the two-way pressure relief valve 100.

[0063] In one embodiment, the explosion-proof valve 300 also includes a sealing ring 330 and an explosion-proof spring 340. The sealing ring 330 is arranged at the first opening 311 of the valve seat 310. The explosion-proof spring 340 elastically connects the valve seat 310 and the valve plate 320, and is used to pull the valve plate 320 to abut against the sealing ring 330 to close the first opening 311.

[0064] Under normal conditions, the valve plate 320 is driven by the explosion-proof spring 340 to abut against the sealing ring 330, and the battery remains sealed. When the abnormality inside the battery causes the air pressure to rise rapidly, the gas overcomes the spring force of the explosion-proof spring 340 and pushes the valve plate 320 open, so that the gas inside the battery is quickly discharged to prevent the battery from bulging or exploding. Specifically, the valve plate 320 is a plate-shaped structure made of a rigid material.

[0065] In one embodiment, see Figure 4 , Figure 5 , Figure 7 and Figure 8 The valve core 120 is arranged in the first channel 111, and the valve core 120 includes a baffle 121, a valve sheet 122 and an elastic element 123; the valve sheet 122 is connected to one side of the baffle 121, and a first gas path 101 is formed between the baffle 121 and the valve sheet 122; a second gas path 102 is formed between the valve sheet 122 and the first channel 111; at least one of the first gas path 101 and the second gas path 102 is in a closed state, and the first gas path 101 and the second gas path 102 are both connected to the first channel 111 and the second side hole 113; two ends of the elastic element 123 are respectively connected to the first channel 111 and the baffle 121 to drive the baffle 121 and the valve sheet 122 to close the second gas path 102.

[0066] It is understood that when the gas pressure in the battery cavity is too low compared to the atmospheric pressure in the external space, please refer to Figure 8 A second gas path 102 is formed between the valve plate 122 and the first channel 111. The elastic element 123 is compressed, and the second gas path 102 is connected to the first channel 111 and the second side hole 113. The two-way pressure relief valve 100 can automatically open and connect the battery cavity and the external space. The gas in the external space flows into the battery cavity to balance the gas pressure in the battery cavity and the atmospheric pressure in the external space. When the gas pressure in the battery cavity and the atmospheric pressure in the external space reach pressure balance, refer to Figure 5 The elastic element 123 can drive the baffle 121 and the valve plate 122 to close the second gas path 102, switching the second gas path 102 to a closed state, and the two-way pressure relief valve 100 can automatically close and block the battery cavity and the external space to prevent external dust and water vapor from entering the battery.

[0067] When the gas pressure in the battery cavity reaches a pressure that is too high compared to the atmospheric pressure in the external space, a first gas path 101 is formed between the baffle 121 and the valve plate 122, and the first gas path 101 connects the first channel 111 and the second side hole 113. The two-way pressure relief valve 100 can automatically open to connect the battery cavity and the external space to balance the gas pressure in the battery cavity and the atmospheric pressure in the external space. When the gas pressure in the battery cavity and the atmospheric pressure in the external space reach a pressure balance, the first gas path 101 is switched to a closed state, and the two-way pressure relief valve 100 can automatically close to block the battery cavity and the external space to prevent external dust and water vapor from entering the battery.

[0068] Furthermore, in this embodiment, an annular stop surface 114 is formed in the first channel 111 at the second side hole 113, and the elastic element 123 can push the baffle 121 to abut the valve plate 122 so that the circumferential edge of the valve plate 122 abuts against the annular stop surface 114. At this time, the second gas path 102 is in a closed state.

[0069] When the gas pressure inside the battery is too low compared to the atmospheric pressure outside, refer to Figure 8 The atmospheric pressure of the external space can push the valve plate 122 to move away from the second side hole 113, so that a second gas path 102 is formed between the circumferential edge of the valve plate 122 and the annular stop surface 114, and the second gas path 102 is connected to the first channel 111 and the second side hole 113. The two-way pressure relief valve 100 can automatically open and conduct the battery cavity and the external space to balance the gas pressure in the battery cavity and the atmospheric pressure in the external space. When the gas pressure in the battery cavity and the atmospheric pressure in the external space reach pressure balance, please refer to Figure 5The elastic element 123 can push the baffle 121 to abut against the valve plate 122, so that the circumferential edge of the valve plate 122 abuts against the annular stop surface 114, and the second gas path 102 is switched to a closed state. The two-way pressure relief valve 100 can automatically close and block the battery cavity and the external space to prevent external dust and water vapor from entering the battery.

[0070] Specifically, the elastic element 123 may be a spring. Furthermore, the first channel 111 is formed with a guide structure of the elastic element 123, which is used to limit the movement trajectory of the elastic compression and release of the elastic element 123, so that the spring force remains relatively stable when subjected to external vibration. The outer diameter of the baffle 121 and the outer diameter of the valve plate 122 in the compressed state are both smaller than the diameter of the inner cavity 211 of the first channel 111, so that when the outer edge of the valve plate 122 is not tightly compressed, the gas can flow from the gap between the outer edge of the valve plate 122 and the first channel 111. Of course, in other embodiments, the elastic element 123 may also be a spring or other elastic member.

[0071] In one embodiment, see Figure 4 , Figure 5 , Figure 7 and Figure 8 The baffle plate 121 is provided with a first through hole 1211, and the valve plate 122 is provided with a second through hole 1221. The projection of the second through hole 1221 relative to the baffle plate 121 does not overlap with the first through hole 1211, so that when the baffle plate 121 and the valve plate 122 are attached to each other, the first gas path 101 is in a closed state. The valve plate 122 is a soft film structure made of elastic material.

[0072] When the gas pressure inside the battery is too high compared to the atmospheric pressure outside, refer to Figure 7 The gas pressure in the battery cavity can press the valve plate 122 through the first through hole 1211 to deform the valve plate 122. The deformation of the valve plate 122 can form a first gas path 101 between the baffle 121 and the valve plate 122. The first gas path 101 connects the first channel 111 and the second side hole 113. The two-way pressure relief valve 100 can automatically open and connect the battery cavity and the external space to exhaust gas to the external space to balance the gas pressure in the battery cavity and the atmospheric pressure in the external space. When the gas pressure in the battery cavity and the atmospheric pressure in the external space reach pressure balance, please refer to Figure 5 The valve plate 122 can be reset and fitted together with the baffle 121, the first gas path 101 is switched to a closed state, and the two-way pressure relief valve 100 can automatically close and block the battery cavity and the external space to prevent external dust and water vapor from entering the battery.

[0073] Furthermore, in the present embodiment, a boss structure 1212 is provided on the baffle plate 121, and the boss structure 1212 is inserted into the second through hole 1221. A plurality of first through holes 1211 are provided and are distributed at circumferential intervals on the boss structure 1212, so that the projection of the second through hole 1221 relative to the baffle plate 121 does not overlap with the first through hole 1211. When the baffle plate 121 and the valve plate 122 are bonded together, the first gas path 101 is in a closed state.

[0074] Specifically, the baffle 121 is provided with an annular protrusion 1213, which is arranged around the second through hole 1221 and is located between the convex column structure 1212 and each first through hole 1211. When the baffle 121 and the valve plate 122 are bonded together, the annular protrusion 1213 enhances the isolation and sealing between the first through hole 1211 and the second through hole 1221, thereby ensuring that the first gas path 101 is in a closed state.

[0075] In one embodiment, in the two-way pressure relief valve 100, the spring pressure of the elastic element 123 is F 弹1 The thrust of the gas in the external space on the valve plate 122 is F 阀外1 The thrust of the gas in the battery cavity on the valve plate 122 is F 阀内1 , the rebound force of the valve plate 122 itself is F 阀自1 When the pressure inside the battery and outside the battery tends to be balanced, the valve plate 122 is at F 弹1 and F 阀自1 Under the action of the air filter, it is in a tightly closed state, which has the function of blocking dust and water vapor.

[0076] See also Figure 7 When the pressure inside the battery is greater than the pressure outside the battery, F 阀内1 >F 阀外1 +F 阀自1 , the inner edge of the valve plate 122 is pushed open, and a gap is formed between the valve plate 122 and the baffle 121 , and the gap is the first gas path 101 , and the gas inside the battery is discharged to the outside through the first gas path 101 to achieve the purpose of pressure relief.

[0077] See also Figure 8 , when the pressure inside the battery is lower than the pressure outside the battery, F 阀外1 >F 阀内1 +F 弹1 The valve plate 122 and the baffle 121 are pushed open as a whole to form a gap with the first channel 111, and the gap is the second gas path 102. External gas is discharged inward through the second gas path 102 to achieve the purpose of pressurization.

[0078] In one embodiment, please refer to Fig.15 Medium to Fig.17In the water stop valve 200, when the sealing plug 221 seals the valve hole 212, the elastic force of the elastic component 230 is the first elastic force, and the first elastic force is F 弹上2 The first elastic force is the upper dead point elastic force of the elastic component 230. In the free state, the lower dead point elastic force of the elastic component 230 is F 弹下2 The gravity of the valve stem 220 is the first gravity, and the first gravity is F 重2 The buoyancy of the float 222 in the liquid is the first buoyancy, and the first buoyancy is F 浮 The thrust of the gas in the battery cavity on the valve stem 220 is F 阀内2 , the thrust of the external space on the valve stem 220 is F 阀外2 .

[0079] When the water stop valve 200 is in a normal state, that is, when the water stop valve 200 is not immersed in water, the valve stem 220 is downward, and F 浮 =0, Formula 1: |F 弹上2 |+|F 阀外2 |<|F 重2 |+|F 阀内2 |, the valve stem 220 falls, and there is a gap between the valve stem 220 and the valve hole 212. The valve hole 212 is in an open state, the water stop valve 200 is in an open state, and the gas can flow freely on both sides of the water stop valve 200.

[0080] When the water stop valve 200 is soaked in water, the valve stem 220 has various postures. The elastic force direction of the elastic component 230 on the valve stem 220 may be in the same direction as the gravity direction. Of course, the elastic force direction of the elastic component 230 on the valve stem 220 may also be opposite to the gravity, or the elastic force direction of the elastic component 230 on the valve stem 220 may also intersect with the gravity. For example, the elastic force direction of the elastic component 230 on the valve stem 220 may also be perpendicular to the gravity. Regardless of the posture, F 浮 >0, the buoyancy direction is opposite to the gravity direction, and the water stop valve 200 is in a closed state. The specific limiting conditions are as follows:

[0081] See also Fig.15 , the direction indicated by arrow D in the figure is the direction of gravity. When the elastic force direction of the elastic component 230 on the valve stem 220 may be in the same direction as the direction of gravity, formula 2: |F 弹上2 |+|F 阀外2 |+|F 浮 |>|F 重2 |+|F 阀内2 |; see Fig.16 , the direction indicated by arrow D in the figure is the direction of gravity. When the elastic force of the elastic component 230 on the valve stem 220 is likely to be opposite to the direction of gravity, formula 3: |F 弹上2 |+|F 重2 |+|F 阀外2 |>|F阀内2 |+|F 浮 |; see Fig.17 , the direction indicated by arrow D in the figure is the direction of gravity. When the elastic force direction of the elastic component 230 on the valve stem 220 may intersect or be perpendicular to the direction of gravity, assuming that the thrust direction of the elastic component 230 on the valve stem 220 is positive, the axial direction of the elastic component 230 is at an angle or acute angle to the vertical, follow formula 1 and formula 2, conditional formula 3: |F 弹上2 |+|F 阀外2 |+|cos(a)*F 浮 |>|cos(a)*F 重2 |+|F 阀内2 |, Formula 4: |F 弹上2 |+|cos(a)*F 重2 |+|F 阀外2 |>|F 阀内2 |+|cos(a)*F 浮 |.

[0082] In order to satisfy Formula 1, Formula 2, Formula 3, and Formula 4 at the same time, |F 重2 |>|F 弹上2 |,|F 弹上2 |>|F 重2 |-|F 浮 |,|F 弹上2 |>|F 浮 |-|F 重2 |, that is, |first gravity|>|first elastic force|, |first elastic force|>|first gravity|-|first buoyancy|, |first elastic force|>|first buoyancy|-|first gravity|.

[0083] By such arrangement, when the battery is soaked in water, the sealing plug 221 can seal the valve hole 212, thereby preventing water from entering the inner cavity of the battery, and preventing the battery from short-circuiting due to water.

[0084] In one embodiment, see Figure 6 The shell 210 is also provided with a second opening 214 connected to the outer cavity 213. The valve plate 320 can also cover the second opening 214 and form a second interval 202 with the mouth wall of the second opening 214. The interval size of the second interval 202 is not greater than the interval size of the first interval 201. The small gap of the second interval 202 blocks most external debris from entering the valve body 110, thereby protecting the sealing of the water stop valve 200 to a certain extent.

[0085] Specifically, the spacing size of the first interval 201 is between 0.1mm and 2mm. Further, the spacing size of the first interval 201 can be selected as 0.1mm, 0.5mm, 0.1mm, 0.15mm or 2mm. The spacing size of the second interval 202 is between 0.1mm and 2mm. Further, the spacing size of the second interval 202 can be selected as 0.1mm, 0.5mm, 0.1mm, 0.15mm or 2mm.

[0086] The battery valve device of this embodiment is an explosion-proof, waterproof, and dustproof bidirectional pressure relief valve structure, which can be applied to energy storage fields such as power batteries. The battery valve device of this embodiment can effectively balance the air pressure of the battery cavity relative to the external space and the dust and moisture-proof effect. Even if the battery is immersed in water more than 10 meters deep, the battery valve device can effectively and reliably prevent water from entering the battery cavity.

[0087] In one embodiment, the battery valve device is in the shape of a flat cylinder as a whole. Of course, in other embodiments, the battery valve device can also be in the shape of a rectangular parallelepiped or other shapes as a whole.

[0088] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A water stop valve (200), characterized in that: The water stop valve (200) comprises a housing (210), a valve stem (220) and an elastic component (230); the housing (210) is provided with an inner cavity (211) and a valve hole (212) communicating the inner cavity (211) with an external space; the valve stem (220) is inserted into the valve hole (212); the valve stem (220) comprises a sealing plug (221) located at a side of the valve hole (212) away from the inner cavity (211), a float (222) connected to the sealing plug (221), and a rod body (223) connected to the sealing plug (221); the elastic component (230) connects the rod body (223) and the housing (210); The sealing plug (221) can form a first gap (201) with the hole wall of the valve hole (212), and the first gap (201) connects the inner cavity (211) and the external space; the sealing plug (221) can also fit against the hole wall of the valve hole (212) to seal the valve hole (212).

2. The water stop valve (200) according to claim 1, characterized in that: The housing (210) is further provided with an outer cavity (213), and the valve hole (212) is communicated with an external space through the outer cavity (213).

3. The water stop valve (200) according to claim 2, characterized in that: The sealing plug (221) is in the shape of a truncated cone, and the valve hole (212) is a tapered hole adapted to the sealing plug (221); Wherein, the radial dimension of the tapered hole gradually increases from the inner cavity (211) to the outer cavity (213).

4. The water stop valve (200) according to claim 1, characterized in that: The valve stem (220) further includes a mounting end (224), the rod body (223) connecting the mounting end (224) and the sealing plug (221), and the elastic component (230) is sleeved on the rod body (223) and elastically abuts between the mounting end (224) and the cavity wall of the inner cavity (211).

5. A battery valve device, characterized in that: The battery valve device comprises a two-way pressure relief valve (100) and a water stop valve (200) according to any one of claims 1 to 4, wherein the battery valve device is provided with a first space, and the two-way pressure relief valve (100) and the water stop valve (200) are arranged in sequence at intervals in the first space.

6. The battery valve device according to claim 5, characterized in that: The battery valve device further comprises an explosion-proof valve (300), and the battery valve device is further provided with a second space, the explosion-proof valve (300) is arranged in the second space, and the first space and the second space are respectively used to communicate with the battery inner cavity and the external space; The explosion-proof valve (300) comprises a valve seat (310) and a valve plate (320), wherein the valve seat (310) is provided with a first opening (311), and the valve plate (320) is configured to open or close the first opening (311); The two-way pressure relief valve (100) comprises a valve body (110) and a valve core (120); a first channel (111) is provided in the valve body (110), and a first side hole (112) and a second side hole (113) connected to the first channel (111); the valve core (120) is configured to open or close the first side hole (112), or the valve core (120) is configured to open or close the second side hole (113); The valve hole (212) and the first opening (311) are both capable of communicating with the external space, and the second side hole (113) is sequentially communicated with the external space through the inner cavity (211) and the valve hole (212).

7. The battery valve device according to claim 6, characterized in that: The valve core (120) is arranged in the first channel (111), and the valve core (120) comprises a baffle (121), a valve plate (122) and an elastic element (123); The valve plate (122) is connected to one side of the baffle plate (121); a first gas path (101) is formed between the baffle plate (121) and the valve plate (122); a second gas path (102) is formed between the valve plate (122) and the first channel (111); at least one of the first gas path (101) and the second gas path (102) is in a closed state, and the first gas path (101) and the second gas path (102) are both connected to the first channel (111) and the second side hole (113); Two ends of the elastic element (123) are respectively connected to the first channel (111) and the baffle (121) to drive the baffle (121) and the valve plate (122) to close the second gas path (102).

8. The battery valve device according to claim 7, characterized in that: The baffle plate (121) is provided with a first through hole (1211), the valve plate (122) is provided with a second through hole (1221), and a projection of the second through hole (1221) relative to the baffle plate (121) does not overlap with the first through hole (1211); The valve plate (122) is deformed to form the first gas path (101) between the baffle (121) and the valve plate (122), and the first gas path (101) is connected to the first through hole (1211) and the second through hole (1221).

9. The battery valve device according to claim 8, characterized in that: An annular stop surface (114) is formed in the first channel (111) at the second side hole (113); the elastic element (123) can push the baffle (121) to abut against the valve plate (122), so that the circumferential edge of the valve plate (122) abuts against the annular stop surface (114); the valve plate (122) can move away from the second side hole (113), so that a second gas path (102) is formed between the circumferential edge of the valve plate (122) and the annular stop surface (114), and the second gas path (102) communicates with the first side hole (112) and the second side hole (113); and / or, The baffle plate (121) is provided with a convex column structure (1212), and the convex column structure (1212) is inserted into the second through hole (1221). The first through hole (1211) is provided with a plurality of convex columns, which are distributed at intervals in the circumferential direction of the convex column structure (1212); the baffle plate (121) is provided with an annular protrusion (1213), and the annular protrusion (1213) is arranged around the second through hole (1221) and is located between the convex column structure (1212) and each of the first through holes (1211).

10. A battery, characterized in that: The battery comprises a housing, a battery module and the battery valve device according to any one of claims 5 to 9, wherein the battery module is arranged in the housing, and the battery valve device is arranged on the housing.

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