CN219345608U - Explosion-proof valve and battery - Google Patents

Explosion-proof valve and battery Download PDF

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Publication number
CN219345608U
CN219345608U CN202320488783.7U CN202320488783U CN219345608U CN 219345608 U CN219345608 U CN 219345608U CN 202320488783 U CN202320488783 U CN 202320488783U CN 219345608 U CN219345608 U CN 219345608U
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explosion
valve
air
cavity
hole
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CN202320488783.7U
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Chinese (zh)
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胡业
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Xinwangda Power Technology Co ltd
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Sunwoda Electric Vehicle Battery Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model relates to the technical field of explosion-proof valves and discloses an explosion-proof valve and a battery, wherein the explosion-proof valve comprises a valve body, a plug body and a first elastic piece. The valve body is provided with a valve cavity, an air inlet hole and an air leakage hole, and the air inlet hole and the air leakage hole are communicated with the valve cavity. The plug body is arranged on the air leakage hole and can move along the axial direction of the air leakage hole. The first elastic piece is arranged on the outer wall of the valve body and is connected with the plug body. Based on the cock body with the setting of first elastic component, but explosion-proof valve repeatedly usable makes battery inside be in under a safe atmospheric pressure state all the time, based on this, will explosion-proof valve is applied in the battery, and the battery pressure release can also continue to use after finishing, can prolong the life of battery.

Description

Explosion-proof valve and battery
Technical Field
The utility model relates to the technical field of explosion-proof valves, in particular to an explosion-proof valve and a battery.
Background
At present, most lithium batteries are provided with explosion-proof valves, when the air pressure in the batteries is overlarge, the explosion-proof valves discharge the air in the lithium batteries, so that the balance of the internal pressure and the external pressure of the lithium batteries is ensured, and the expansion deformation of the lithium battery shell is avoided, so that the leakage or explosion of the lithium batteries is prevented.
In the prior art, most explosion-proof valves used in lithium batteries mainly comprise a valve body and a diaphragm, and when the air pressure in the battery is greater than the preset air pressure, the diaphragm is broken, so that the air in the battery is discharged, and the pressure relief of the battery is completed. The explosion-proof valve with the structure has the advantages of simple structure, low processing cost and the like, but belongs to a disposable consumable, is difficult to repair, can prevent the battery from being used continuously, and has short service life.
Disclosure of Invention
The purpose of the utility model is that: the explosion-proof valve capable of being reused is provided, and can be applied to a battery to prolong the service life of the battery.
In order to achieve the above object, the present utility model provides an explosion-proof valve comprising:
the valve body is provided with a valve cavity, an air inlet hole and an air leakage hole, and the air inlet hole and the air leakage hole are communicated with the valve cavity;
the plug body is arranged on the air leakage hole and can move along the axial direction of the air leakage hole;
the first elastic piece is arranged on the outer wall of the valve body and connected with the plug body, and is used for enabling the plug body to block the air leakage hole;
the plug body can jack up the first elastic piece under preset air pressure and open the air leakage hole.
In a particular embodiment of the utility model, the plug body comprises:
the plug rod is arranged in the air leakage hole and can move along the axial direction of the air leakage hole, and a first gap is arranged between the outer wall of the plug rod and the wall of the air leakage hole;
and the plug head is connected with one end of the plug rod, which is far away from the valve cavity, and is used for sealing the air leakage hole, and one side of the plug head, which is far away from the plug rod, is connected with the first elastic piece.
In a specific embodiment of the present utility model, the method further comprises:
the sealing ring is sleeved on the plug rod and is positioned between the plug head and the outer wall of the valve body.
In a particular embodiment of the utility model, the valve body comprises:
the first mounting part is provided with a first cavity, and the air inlet hole is arranged on the first mounting part and is communicated with the first cavity;
the second installation part is provided with a second cavity, is cylindrical and is connected with the first installation part, and the air leakage hole is arranged on the second installation part and is communicated with the second cavity;
the first chamber is communicated with the second chamber to form the valve cavity;
the first elastic piece is an elastic rubber sleeve which is sleeved on the second installation part and coats the plug body; the plug body can jack up the elastic rubber sleeve under preset air pressure, and a second gap which can be used for discharging air is formed between the elastic rubber sleeve and the second installation part.
In a specific embodiment of the present utility model, the method further comprises:
a first connection structure and/or a second connection structure;
the first connection structure includes:
the first annular clamping groove is arranged on the outer wall of the second installation part and surrounds the axis of the second installation part;
the first annular clamping block is arranged on the elastic rubber sleeve and is used for being matched with the first annular clamping groove;
the second connection structure includes:
the second annular clamping block is arranged on the outer wall of the second installation part and surrounds the axis of the second installation part;
the second annular clamping groove is arranged on the elastic rubber sleeve and is used for being matched with the second annular clamping block.
In a specific embodiment of the present utility model, the method further comprises:
the mounting frame is fixedly connected in the first cavity and positioned between the air inlet hole and the air outlet hole, and an air vent is formed in the mounting frame;
the second elastic piece is fixedly connected to the mounting frame, and the edge of the second elastic piece is in sealing contact with the cavity wall of the first cavity and can be separated from the cavity wall of the first cavity under preset air pressure.
In a specific embodiment of the utility model, the second elastic member is arranged on one side of the mounting frame close to the air leakage hole, and the edge of the second elastic member extends away from the mounting frame in a bending manner and is in sealing contact with the cavity wall of the first cavity.
In a specific embodiment of the present utility model, the second elastic member is a circular sheet;
the first chamber comprises a subchamber, the cavity wall of the subchamber is cylindrical, the second elastic piece is arranged in the subchamber and is coaxially arranged with the subchamber, and the edge of the second elastic piece is in sealing contact with the cavity wall of the subchamber.
In a specific embodiment of the present utility model, the air inlet hole is communicated with the subchamber, and the axis of the air inlet hole is parallel to the axis of the subchamber;
recording a plane perpendicular to the axis of the subchamber as a first reference plane;
the projection of the subchamber on the first reference plane is a first projection; the projection of the air inlet hole on the first reference plane is a second projection;
the first projection coincides with the second projection and the area of the second projection is not smaller than the area of the first projection.
The utility model also provides a battery, which comprises the explosion-proof valve; further comprises:
the shell is provided with a containing cavity and an opening, and the opening is communicated with the containing cavity;
the battery cell is arranged in the accommodating cavity;
the cover body covers the opening and is connected with the shell;
the explosion-proof valve is arranged on the cover body, the air inlet hole is used for being communicated with the accommodating cavity, and the air leakage hole is used for discharging air in the accommodating cavity out of the shell.
Compared with the prior art, the explosion-proof valve and the battery have the beneficial effects that:
the pressure release assembly of the explosion-proof valve comprises a plug body and a first elastic piece, wherein the plug body is arranged on the air release hole and can move along the axial direction of the air release hole, and the first elastic piece is connected with the plug body so that the plug body can seal the air release hole. The explosion-proof valve is applied to the battery, the valve cavity is communicated with the inside of the battery through the air inlet hole, and gas generated in the battery enters the valve cavity through the air inlet hole. The battery is in a sealed state in an initial state so as to ensure the normal use of the battery. When the air pressure in the battery is greater than the preset air pressure, the plug body jacks up the first elastic piece and opens the air leakage hole under the preset air pressure, and the air in the battery is discharged from the air leakage hole through the valve cavity, so that the pressure release of the battery is completed; when the air pressure in the battery is not more than the preset air pressure, the plug body can block the air leakage hole again under the action of the first elastic piece, so that the battery returns to a sealing state again, namely, the explosion-proof valve can be reused, the inside of the battery is always in a safe air pressure state, and based on the air pressure, the battery can be used continuously after pressure relief is finished, and the service life of the battery is prolonged.
Drawings
Fig. 1 is a schematic structural view of an explosion-proof valve of embodiment 1 of the present utility model;
FIG. 2 is an enlarged schematic view of E in FIG. 1 of embodiment 1 of the present utility model;
fig. 3 is a schematic view of another structure of the explosion-proof valve of embodiment 1 of the present utility model;
fig. 4 is a schematic structural view of an explosion-proof valve of embodiment 2 of the present utility model;
fig. 5 is a schematic structural view of an explosion-proof valve of embodiment 3 of the present utility model;
fig. 6 is a schematic structural view of an explosion-proof valve of embodiment 4 of the present utility model;
fig. 7 is a schematic structural view of an explosion-proof valve of embodiment 5 of the present utility model;
FIG. 8 is a structural view of the mount of embodiment 5 of the present utility model;
fig. 9 is a schematic view of another structure of the explosion-proof valve of embodiment 5 of the present utility model;
fig. 10 is a structural view of a battery according to embodiment 6 of the present utility model.
In the figure, 1, a valve body; 11. a first mounting portion; 11A, a first chamber; 11a, subchambers; 12. a second mounting portion; 12A, a second chamber; 121. the first annular clamping groove; 122. the second annular clamping block; 2. a plug body; 21. a plug rod; 22. a plug head; 3. a first elastic member; 31. a first annular clamping block; 32. the second annular clamping groove; 4. a seal ring; 5. a mounting frame; 51. ventilation holes; 6. a second elastic member; A. a valve cavity; B. an air inlet hole; C. a vent hole; D. a first gap; 100. an explosion-proof valve; 200. a housing; 300. and a cover body.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
The explosion-proof valve comprises a valve body 1, a plug body 2 and a first elastic piece 3. The valve body 1 is provided with a valve cavity A, an air inlet hole B and an air leakage hole C, and the air inlet hole B and the air leakage hole C are communicated with the valve cavity A. The plug body 2 is arranged in the air leakage hole C and can move along the axial direction of the air leakage hole C. The first elastic piece 3 is arranged on the outer wall of the valve body 1 and connected with the plug body 2, and is used for enabling the plug body 2 to block the air leakage hole C. The plug body 2 can jack up the first elastic member 3 under a preset air pressure, and the air leakage hole C is opened.
When the explosion-proof valve is actually used, the explosion-proof valve is applied to the battery, the valve cavity A is communicated with the inside of the battery through the air inlet hole B, and gas generated in the battery enters the valve cavity A through the air inlet hole B. The battery is in a sealed state in an initial state so as to ensure the normal use of the battery. When the gas in the battery is accumulated to a certain extent, the gas pressure in the battery is larger than the preset gas pressure, the plug body 2 jacks up the first elastic piece 3 under the action of the gas pressure, the gas leakage hole C is opened, and the gas in the battery is discharged out of the battery through the gas leakage hole C, so that the pressure relief of the battery is completed; when the air pressure in the battery is not greater than the preset air pressure, the plug body 2 can block the air leakage hole C again under the action of the first elastic piece 3, so that the battery returns to a sealing state again, namely, the explosion-proof valve can be reused, the inside of the battery is always in a safe air pressure state, and based on the air pressure, the battery can be used continuously after pressure relief is finished, and the service life of the battery is prolonged.
In the prior art, there are other reusable explosion-proof valves, and the pressure release assembly of the explosion-proof valve uses a spring and a valve core as core components, the spring and the valve core are arranged in a valve cavity of a valve body, and the valve core is used for sealing an air inlet hole through the elastic force provided by the spring, so that a battery is in a sealed state. When the air pressure in the battery is larger than a preset value, the air pressure overcomes the elasticity of the spring, so that the valve core is separated from the air inlet hole to open the air inlet hole, and based on the air pressure, the air in the battery is discharged through the air discharge hole, and the pressure relief of the battery is completed. When the air pressure in the battery is not greater than a preset value, the valve core closes the air inlet again under the action of the elastic force of the spring, so that the lithium battery is restored to a sealing state.
The valve core and the spring of the reusable explosion-proof valve are arranged in the valve cavity, so that the valve body of the explosion-proof valve is generally divided into an upper valve body and a lower valve body for facilitating the assembly of the valve core and the spring, and the upper valve body and the lower valve body form the valve body in an assembly mode and form the valve cavity in the valve body. When in assembly, the valve core and the spring are assembled into the upper valve body or the lower valve body, and then the upper valve body and the lower valve body are connected together to form the explosion-proof valve finished product. The explosion-proof valve for dividing the valve body into the upper valve body and the lower valve body has the advantages of complex structure and low assembly efficiency of the pressure relief assembly.
In the utility model, the pressure relief assembly of the explosion-proof valve comprises the plug body 2 and the first elastic piece 3, and the pressure relief is realized through the plug body 2 arranged on the pressure relief hole C and the first elastic piece 3 arranged on the outer wall of the valve body 1, so that a valve core and a spring are not required to be arranged in the valve cavity A, and on the basis, the explosion-proof valve does not need to be provided with a valve body in a split structure for assembling the valve core and the spring into the valve cavity A, so that the structure of the explosion-proof valve can be simplified. In addition, when the pressure relief assembly is assembled on the valve body 1 to form the explosion-proof valve, only the plug body 2 is required to be arranged on the air release hole C, and the first elastic piece 3 is required to be arranged on the outer wall of the valve body 1, so that the assembly operation is simple, and the assembly efficiency of the pressure relief assembly can be improved.
The following provides a detailed description of various specific implementations of the explosion-proof valve of the present utility model.
Example 1
As shown in fig. 1 and 2, the explosion-proof valve includes the structure as described above. As a specific implementation of this embodiment, the plug body 2 includes a plug rod 21 and a plug head 22. The plug rod 21 is disposed in the air release hole C and can move along the axial direction of the air release hole C, and a first gap D is disposed between the outer wall of the plug rod 21 and the wall of the air release hole C. The plug 22 is connected with one end of the plug rod 21 away from the valve cavity a, and is used for blocking the air leakage hole C, and one side of the plug 22 away from the plug rod 21 is connected with the first elastic member 3.
In this embodiment, the plug body 2 includes a plug rod 21, when the plug body 2 is assembled on the valve body 1, the plug rod 21 is inserted into the air release hole C, the air release hole C may play a limiting role on the plug body 2, and based on this, when the first elastic member 3 is not assembled, the plug body 2 may also be stably arranged on the air release hole C, so as to be not easy to fall, thereby facilitating the subsequent assembly of the first elastic member 3 on the valve body 1.
In practical application, the plug 22 seals the air release hole C under the action of the first elastic member 3, when the explosion-proof valve is releasing pressure, the plug 22 jacks up the first elastic member 3 under the action of air pressure, the plug 22 is separated from the air release hole C, so that the air release hole C is opened, and air is discharged from the output end of the air release hole C through the first gap D, so that the pressure release function of the explosion-proof valve is realized.
In some embodiments, the plug body 2 is made of rubber, or other materials that can perform a sealing function, so as to ensure the sealing performance of the plug head 22 when sealing the air leakage hole C.
In other embodiments, referring to fig. 2, the explosion protection valve further comprises a sealing ring 4, wherein the sealing ring 4 is sleeved on the plug rod 21 and is located between the plug head 22 and the outer wall of the valve body 1. In practical application, under the action of the first elastic member 3, the plug 22 presses the sealing ring 4 against the outer wall of the valve body 1, so that the sealing performance of the plug 22 when sealing the air leakage hole C can be ensured.
Specifically, the sealing ring 4 is provided to ensure the sealing performance of the plug 22 when the air leakage hole C is sealed, no matter what material the plug body 2 is, and based on this, the plug rod 21 may be made of metal, rubber, plastic, etc., and the material of the plug body 2 may be set according to practical application.
In some embodiments, as shown in fig. 1, the valve body 1 includes a first mounting portion 11 and a cylindrical second mounting portion 12 that are connected to each other. The first mounting portion 11 is provided with a first chamber 11A, and the air inlet hole B is disposed on the first mounting portion 11 and is in communication with the first chamber 11A. The second mounting portion 12 is provided with a second chamber 12A, and the air leakage hole C is provided on the second mounting portion 12 and is in communication with the second chamber 12A. The second mounting portion 12 includes a side wall and a top wall facing away from the first mounting portion 11, and the air release hole C is provided on the side wall of the second mounting portion 12. The first chamber 11A communicates with the second chamber 12A to form the valve chamber a. In practical application, the first mounting portion 11 is configured to be connected to the cover 300 of the battery, the air inlet hole B is in communication with the accommodating cavity of the housing 200 of the battery, and the air outlet hole C is located outside the battery.
At this time, the first elastic member 3 is an elastic rubber sleeve, which is sleeved on the side wall of the second installation portion 12 and covers the plug body 2; the plug body 2 can jack up the elastic rubber sleeve under preset air pressure, and a second gap which can be used for discharging air is formed between the elastic rubber sleeve and the second mounting part 12.
Specifically, the first elastic piece 3 is an elastic rubber sleeve, and is assembled on the valve body 1 in a sleeved mode, so that the connection stability of the first elastic piece 3 and the valve body 1 can be ensured without matching with other connecting pieces, and the structure of the explosion-proof valve is simplified. Meanwhile, the first elastic piece 3 can be assembled on the valve body 1 without being matched with other connecting pieces, so that the operation is simple and the efficiency is high during the assembly.
In some embodiments, the second mounting portion 12 is cylindrical or prismatic, which is not limited in this embodiment.
In some embodiments, as shown in fig. 1, the first mounting portion 11, the first chamber 11A, the second mounting portion 12, and the second chamber 12A are all cylindrical and coaxially arranged, and the outer diameter of the first mounting portion 11 is the same as the outer diameter of the second mounting portion 12, and the diameter of the first chamber 11A is the same as the diameter of the second chamber 12A. In other embodiments, as shown in fig. 3, the first mounting portion 11, the first chamber 11A, the second mounting portion 12 and the second chamber 12A are all cylindrical and coaxially arranged, and the outer diameter of the first mounting portion 11 is larger than the outer diameter of the second mounting portion 12. The diameter of the first chamber 11A is larger than the diameter of the second chamber 12A. In view of this, the first mounting portion 11 and the second mounting portion 12 of the valve body 1 may be configured as shown in fig. 1, or as shown in fig. 3, and the present embodiment is not limited thereto, and may be configured according to practical applications.
In addition, the shapes of the first chamber 11A and the second chamber 12A are not limited in this embodiment, and are set according to practical applications, and the first chamber 11A and the second chamber 12A are cylindrical and are only one specific implementation of this embodiment.
In some embodiments, as shown in fig. 1, the explosion-proof valve further comprises a first connection structure comprising a first annular clamping groove 121 and a first annular clamping block 31, wherein the first annular clamping groove 121 is provided on an outer wall of the second mounting portion 12 and is arranged around an axis of the second mounting portion 12; the first annular clamping block 31 is arranged on the elastic rubber sleeve and is used for being matched with the first annular clamping groove 121. In practical application, the elastic rubber sleeve is installed on the second installation portion 12 of the valve body 1 in a sleeved mode, and in addition, the first annular clamping block 31 on the elastic rubber sleeve is also clamped on the first annular clamping groove 121 on the second installation portion 12. Based on the mutual cooperation of the first annular clamping block 31 and the first annular clamping groove 121, the connection stability of the elastic rubber sleeve and the second installation portion 12 can be improved, so that the elastic rubber sleeve is not easy to fall off from the second installation portion 12.
In summary, in the explosion-proof valve according to the embodiment, the pressure relief assembly includes the plug body 2 and the first elastic member 3, wherein the plug body 2 includes the plug rod 21 and the plug head 22, and the first elastic member 3 is an elastic rubber sleeve. When the pressure release assembly is assembled on the valve body 1, the plug rod 21 of the plug body 2 is inserted into the air release hole C from the output end of the air release hole C, the first elastic piece 3 is sleeved on the second mounting part 12 of the valve body 1 and matched with the plug body 2, and based on the first elastic piece, the explosion-proof valve does not need to be provided with the valve body 1 in a split structure for the pressure release assembly to be mounted in the valve cavity A, so that the structure of the explosion-proof valve can be simplified. In addition, the assembly mode of the embodiment is used for assembling the pressure relief assembly on the valve body 1, the assembly operation is simple, and the assembly efficiency of the pressure relief assembly can be improved.
Example 2
The explosion-proof valve of this embodiment has a structure substantially the same as that of embodiment 1, the second mounting portion 12 is cylindrical, and the second mounting portion 12 includes a side wall and a top wall facing away from the first mounting portion 11, except that: as shown in fig. 4, the air release hole C is provided on the top wall of the second mounting portion 12. At this time, the first elastic member 3 is an elastic film, the elastic film covers the plug body 2, and both ends in the length direction thereof are locked on the top wall of the second mounting portion 12 by screws. Under preset air pressure, the plug body 2 jacks up the elastic rubber sheet to realize the pressure relief function of the explosion-proof valve. Based on this, the plug body 2 and the first elastic member 3 as the pressure relief assembly do not need to be disposed in the valve cavity a of the valve body 1, and the structure of the explosion-proof valve can be simplified, so that the assembly efficiency of the pressure relief assembly can be improved.
In addition, the first elastic body may be an elastic rubber sleeve as described in embodiment 1, and the elastic rubber sleeve in embodiment 1 is a first elastic rubber sleeve, and at this time, the elastic rubber sleeve in this embodiment is a second elastic rubber sleeve, and the second elastic rubber sleeve has the same structure as the first elastic rubber sleeve, and further includes a covering portion that covers the top wall of the second installation portion 12, and the covering portion is provided with an exhaust hole. The second elastic rubber sleeve is sleeved on the second installation part 12, and the covering part covers the top wall of the second installation part 12 so as to be connected with the plug body 2. Under preset air pressure, the plug body 2 jacks up the covering part of the second elastic rubber sleeve to form an exhaust gap, and at the moment, air is discharged through the exhaust gap and the exhaust hole to realize the pressure relief function of the explosion-proof valve.
In other embodiments, the second mounting portion 12 may have a prismatic, spherical or other shape, where the second mounting portion 12 includes a mounting plane, the air leakage hole C is disposed on the mounting plane, and the elastic film is fixed on the mounting plane by the screw. As can be seen from this, the shape of the second mounting portion 12 may be various, and the second mounting portion 12 according to the present embodiment is a cylindrical shape, which is only one embodiment, and the shape of the second mounting portion 12 is not limited in the present embodiment.
Example 3
The explosion-proof valve of this embodiment has substantially the same structure as that of embodiment 1, except that: as shown in fig. 5, the plug body 2 has a spherical structure. The output end of the air leakage hole C is provided with an annular slope matched with the spherical plug body 2. At this time, the plug body 2 is made of rubber or other materials capable of playing a sealing role. The first elastic member 3 is sleeved on the second mounting portion 12 and covers the plug body 2. Based on this, the explosion-proof valve of this embodiment also has simple structure, and pressure release subassembly packaging efficiency is high advantage.
As can be seen from this embodiment, the plug body 2 may have a structure as shown in this embodiment in addition to the structure as shown in embodiment 1, and in addition, the plug body 2 may have another structure that does not need to be assembled into the valve cavity a, which is not limited in this embodiment.
Example 4
The explosion-proof valve of this embodiment has substantially the same structure as that of embodiment 1, except that: the explosion-proof valve includes a second connection structure by which the first connection structure is replaced, as shown in fig. 6, the second connection structure including a second annular clamping block 122 and a second annular clamping groove 32. Wherein the second annular clamping block 122 is arranged on the outer wall of the second mounting part 12 and around the axis of the second mounting part 12. The second annular clamping groove 32 is arranged on the elastic rubber sleeve and is used for being matched with the second annular clamping block 122.
In practical application, the elastic rubber sleeve is installed on the second installation portion 12 of the valve body 1 in a sleeved mode, and the second annular clamping groove 32 on the elastic rubber sleeve is matched with the second annular clamping block 122 on the second installation portion 12. Based on the mutual cooperation of the second annular clamping block 122 and the second annular clamping groove 32, the connection stability of the elastic rubber sleeve and the second mounting portion 12 can be improved, so that the elastic rubber sleeve is not easy to fall off from the second mounting portion 12.
In addition, in other embodiments, the explosion-proof valve may be provided with the first connection structure and the second connection structure at the same time, which is not limited in this embodiment.
Example 5
The explosion-proof valve of this embodiment has substantially the same structure as that of embodiment 1, except that: as shown in fig. 7 and 8, the explosion-proof valve further includes a mounting bracket 5 and a second elastic member 6. Wherein, the mounting frame 5 is fixedly connected in the first chamber 11A and is located between the air inlet hole B and the air outlet hole C, and the mounting frame 5 is provided with an air vent 51. The second elastic member 6 is fixedly connected to the mounting frame 5, and an edge of the second elastic member 6 is in sealing contact with a cavity wall of the first cavity 11A and can be separated from the cavity wall of the first cavity 11A under a preset air pressure. Specifically, in the normal state, the edge of the second elastic member 6 is in sealing contact with the edge of the first chamber 11A; under preset air pressure, the edge of the second elastic member 6 is separated from the wall of the first chamber 11A to form an air-permeable channel, and air enters the first chamber 11A through the air inlet B, then enters the second chamber 12A through the air hole 51 and the air-permeable channel, and finally is discharged from the air-release hole C. Based on this, the explosion-proof valve of this embodiment has dual sealing structure under the normal state, and one is the sealing structure that first elastic component 3 and cock body 2 cooperation are constituteed, and another is the sealing structure that second elastic component 6 and mounting bracket 5 cooperation are constituteed, can guarantee the sealing performance under the normal state of explosion-proof valve.
In addition, the second elastic member 6 cooperates with the mounting frame 5 to also play a role of a vent valve, and if the first elastic member 3 and the plug body 2 are lost, the second elastic member 6 and the mounting frame 5 can be arranged to avoid failure of the explosion-proof valve.
Further, the second elastic member 6 is disposed on one side of the mounting frame 5 near the air leakage hole C, the edge of the second elastic member 6 extends away from the mounting frame 5 in a bending manner and is in sealing contact with the cavity wall of the first cavity 11A, if air enters the valve cavity a from the air leakage hole C, the edge of the second elastic member 6 further abuts against the cavity wall of the first cavity 11A under the action of air pressure, that is, the air can only circulate unidirectionally along the direction from the air inlet hole B to the air leakage hole C, and the external air cannot enter the battery, so that the air can be prevented from flowing backwards.
Further, the second elastic member 6 is a circular sheet, and the mounting frame 5 is a circular frame; the first valve cavity A comprises a subchamber 11a, the cavity wall of the subchamber 11a is cylindrical, the second elastic piece 6 is arranged in the subchamber 11a and is coaxially arranged with the subchamber 11a, and the edge of the second elastic piece 6 is in sealing contact with the cavity wall of the subchamber 11 a. When the first elastic piece and the mounting frame 5 are assembled, the second elastic piece 6 is inserted into the subchamber 11a in a state that the axis is perpendicular to the axis of the subchamber 11a, then the second elastic piece 6 is turned over so that the edge of the second elastic piece 6 is in sealing contact with the cavity wall of the subchamber 11a, and then the mounting frame 5 is fixed in the subchamber 11a and the second elastic piece 6 is fixedly connected with the mounting frame 5. A circular second elastic member 6, a circular mounting 5, which is simple in construction and facilitates assembly into said subchamber 11a of the cylindrical chamber wall.
Specifically, the fixing connection between the mounting frame 5 and the second elastic member 6 may be adhesive, which is not limited in this embodiment. The fixing connection between the mounting frame 5 and the sub-chamber 11a may be adhesive or welding, which is not limited in this embodiment.
Further, the air inlet hole B is communicated with the sub-chamber 11a, and the axis of the air inlet hole B is parallel to the axis of the sub-chamber 11 a; a plane perpendicular to the axis of the sub-chamber 11a is noted as a first reference plane. The projection of the subchamber 11a on the first reference plane is a first projection; the projection of the air inlet hole B on the first reference plane is a second projection. The first projection coincides with the second projection, i.e. the inlet aperture B is arranged opposite the sub-chamber 11 a. The area of the second projection is not smaller than the area of the first projection, that is, the opening formed by the air inlet hole B is not smaller than the sub-chamber 11a, wherein the structure of the area of the second projection is equal to the area of the first projection, as shown in fig. 7, and the structure of the area of the second projection is larger than the area of the first projection, as shown in fig. 9. Based on this, the first elastic member 3 and the mounting frame 5 may be directly assembled into the sub-chamber 11a from the air inlet hole B, so that the assembling process is convenient, the valve body 1 does not need to be provided with a split structure for the first elastic member 3 and the mounting frame 5 to be assembled into the sub-chamber 11a, and the structure of the explosion-proof valve may be simplified.
Specifically, the air inlet hole B may be a circular hole, a square hole, a special hole, or the like, which is not limited in this embodiment.
Example 6
As shown in fig. 10, the present utility model also proposes a battery including the explosion-proof valve 100 according to any one of embodiments 1 to 5; further comprises: the battery pack comprises a housing 200, a battery cell (not shown in the figure) and a cover 300, wherein the housing 200 is provided with a containing cavity (not shown in the figure) and an opening (not shown in the figure), and the opening is communicated with the containing cavity. The battery cell is arranged in the accommodating cavity. The cover 300 covers the opening and is connected to the housing 200. The explosion-proof valve 100 is disposed on the cover 300, the air inlet is used for being communicated with the accommodating cavity, and the air outlet is used for discharging the air in the accommodating cavity to the outside of the housing 200.
Because the explosion-proof valve 100 is adopted by the battery, the battery has the advantages of simple structure, good safety performance and the like.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. An explosion-proof valve, comprising:
the valve body (1) is provided with a valve cavity (A), an air inlet hole (B) and an air leakage hole (C), and the air inlet hole (B) and the air leakage hole (C) are communicated with the valve cavity (A);
the plug body (2) is arranged in the air leakage hole (C) and can move along the axial direction of the air leakage hole (C);
the first elastic piece (3) is arranged on the outer wall of the valve body (1) and connected with the plug body (2) and is used for enabling the plug body (2) to seal the air leakage hole (C);
the plug body (2) can jack up the first elastic piece (3) under preset air pressure, and the air leakage hole (C) is opened.
2. The explosion-proof valve according to claim 1, wherein the plug body (2) comprises:
the plug rod (21) is arranged in the air leakage hole (C) and can move along the axial direction of the air leakage hole (C), and a first gap (D) is arranged between the outer wall of the plug rod (21) and the hole wall of the air leakage hole (C);
the plug head (22) is connected with one end, far away from the valve cavity (A), of the plug rod (21) and used for sealing the air leakage hole (C), and one side, far away from the plug rod (21), of the plug head (22) is connected with the first elastic piece (3).
3. The explosion protection valve of claim 2, further comprising:
the sealing ring (4) is sleeved on the plug rod (21) and is positioned between the plug head (22) and the outer wall of the valve body (1).
4. The explosion-proof valve according to claim 1, characterized in that the valve body (1) comprises:
the first installation part (11) is provided with a first chamber (11A), and the air inlet hole (B) is arranged on the first installation part (11) and is communicated with the first chamber (11A);
the second installation part (12) is provided with a second chamber (12A), the second installation part (12) is cylindrical and is connected with the first installation part (11), and the air leakage hole (C) is arranged on the second installation part (12) and is communicated with the second chamber (12A);
-said first chamber (11A) is in communication with said second chamber (12A) to form said valve chamber (a);
the first elastic piece (3) is an elastic rubber sleeve which is sleeved on the second installation part (12) and covers the plug body (2); the plug body (2) can jack up the elastic rubber sleeve under preset air pressure, and a second gap which can be used for discharging air is formed between the elastic rubber sleeve and the second installation part (12).
5. The explosion protection valve of claim 4, further comprising:
a first connection structure and/or a second connection structure;
the first connection structure includes:
a first annular clamping groove (121) which is arranged on the outer wall of the second installation part (12) and is arranged around the axis of the second installation part (12);
the first annular clamping block (31) is arranged on the elastic rubber sleeve and is matched with the first annular clamping groove (121);
the second connection structure includes:
a second annular clamping block (122) which is arranged on the outer wall of the second mounting part (12) and is arranged around the axis of the second mounting part (12);
and the second annular clamping groove (32) is arranged on the elastic rubber sleeve and is matched with the second annular clamping block (122).
6. The explosion protection valve of claim 4, further comprising:
the mounting frame (5) is fixedly connected in the first cavity (11A) and positioned between the air inlet hole (B) and the air outlet hole (C), and an air vent (51) is formed in the mounting frame (5);
the second elastic piece (6) is fixedly connected to the mounting frame (5), and the edge of the second elastic piece (6) is in sealing contact with the cavity wall of the first cavity (11A) and can be separated from the cavity wall of the first cavity (11A) under preset air pressure.
7. The explosion-proof valve according to claim 6, characterized in that the second elastic member (6) is arranged on the side of the mounting frame (5) close to the venting hole (C), and that the edge of the second elastic member (6) extends bent away from the mounting frame (5) and is in sealing contact with the wall of the first chamber (11A).
8. The explosion-proof valve according to claim 6, characterized in that the second elastic element (6) is a circular sheet;
the first chamber (11A) comprises a subchamber (11A), the cavity wall of the subchamber (11A) is cylindrical, the second elastic piece (6) is arranged in the subchamber (11A) and is coaxially arranged with the subchamber (11A), and the edge of the second elastic piece (6) is in sealing contact with the cavity wall of the subchamber (11A).
9. The explosion-proof valve according to claim 8, characterized in that the air intake (B) is in communication with the subchamber (11 a), the axis of the air intake (B) being mutually parallel to the axis of the subchamber (11 a);
-noting the plane perpendicular to the axis of the subchamber (11 a) as a first reference plane;
the projection of the subchamber (11 a) on the first reference plane is a first projection; the projection of the air inlet hole (B) on the first reference plane is a second projection;
the first projection coincides with the second projection and the area of the second projection is not smaller than the area of the first projection.
10. A battery comprising an explosion-proof valve (100) according to any one of claims 1 to 9; further comprises:
a housing (200) provided with a receiving chamber and an opening, the opening being in communication with the receiving chamber;
the battery cell is arranged in the accommodating cavity;
a cover (300) covering the opening and connected to the housing (200);
the explosion-proof valve (100) is arranged on the cover body (300), the air inlet hole (B) is communicated with the accommodating cavity, and the air leakage hole (C) is used for discharging air in the accommodating cavity out of the shell (200).
CN202320488783.7U 2023-03-07 2023-03-07 Explosion-proof valve and battery Active CN219345608U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320488783.7U CN219345608U (en) 2023-03-07 2023-03-07 Explosion-proof valve and battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320488783.7U CN219345608U (en) 2023-03-07 2023-03-07 Explosion-proof valve and battery

Publications (1)

Publication Number Publication Date
CN219345608U true CN219345608U (en) 2023-07-14

Family

ID=87110027

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320488783.7U Active CN219345608U (en) 2023-03-07 2023-03-07 Explosion-proof valve and battery

Country Status (1)

Country Link
CN (1) CN219345608U (en)

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Address after: 518000 1-2 Floor, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen City, Guangdong Province

Patentee after: Xinwangda Power Technology Co.,Ltd.

Address before: 518132 1-2/F, Building A, Xinwangda Industrial Park, No. 18 Tangjianan Road, Gongming Street, Guangming New District, Shenzhen, Guangdong Province

Patentee before: SUNWODA ELECTRIC VEHICLE BATTERY Co.,Ltd.

CP03 Change of name, title or address