CN221176550U - Explosion-proof balance valve of preventing kick-backing - Google Patents
Explosion-proof balance valve of preventing kick-backing Download PDFInfo
- Publication number
- CN221176550U CN221176550U CN202322608172.4U CN202322608172U CN221176550U CN 221176550 U CN221176550 U CN 221176550U CN 202322608172 U CN202322608172 U CN 202322608172U CN 221176550 U CN221176550 U CN 221176550U
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- Prior art keywords
- valve
- check
- screw rod
- explosion
- valve body
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- 238000004880 explosion Methods 0.000 claims abstract description 22
- 238000009423 ventilation Methods 0.000 claims description 33
- 238000007789 sealing Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses an anti-rebound anti-explosion balance valve. The explosion-proof balance valve comprises a valve body, an umbrella valve, a screw rod and a check guide post, wherein an annular step is arranged at the inner periphery of the upper end of the valve body, a downward extending outer retaining wall is arranged in the middle of the inner part of the valve body, a check hole with a through side surface is arranged on the outer retaining wall, the umbrella valve is arranged on the annular step, the upper end of the screw rod is connected with the middle part of the umbrella valve, a horizontally extending check groove is formed in the side surface circumference of the screw rod, an outer spring is wound outside the screw rod, the check guide post is located inside the check groove, one end of the check guide post is connected inside the screw rod through the check spring, and the other end of the check guide post can extend out of the check groove and be inserted into the check hole. According to the anti-rebound anti-explosion balance valve, the anti-rebound function is added on the basis of a conventional anti-explosion valve, so that inflammable gas can be effectively discharged, and the risk of explosion caused by accumulation of inflammable gas in a battery pack is avoided.
Description
Technical Field
The utility model relates to the field of balance valves, in particular to an anti-rebound anti-explosion balance valve.
Background
Along with the trend of gradually replacing fuel vehicles by new energy automobiles, the demand of the market for lithium ion batteries is rapidly increased, and meanwhile, the safety requirement for battery packs is also higher.
Currently, there are many methods for controlling the flow of liquid. The explosion-proof valve for the lithium ion battery pack mainly has two functions of explosion prevention and ventilation, wherein the ventilation mainly depends on a waterproof ventilation film, and the pressure balance between the inside and the outside of the box body is realized when the battery pack works normally; the explosion-proof function is realized mainly by means of a spring, needling or a valve, and when the internal pressure of the battery box reaches a certain pressure, the spring or the valve structure is jacked up, so that a blasting channel is opened, and quick pressure relief is realized.
However, when the thermal failure occurs, the cell burns to generate flammable gas such as hydrogen, and because the explosion limit of the hydrogen is very wide (4% -75%), the explosion valve needs to be kept in a continuously opened state to prevent the flammable gas such as hydrogen from being aggregated and further exploding, so that the flammable gas in the battery pack can be continuously discharged, otherwise, the explosion risk may be caused due to the aggregation of the flammable gas in the battery pack.
Disclosure of utility model
In order to solve the problems, the utility model provides an anti-rebound anti-explosion balance valve.
According to one aspect of the present utility model, there is provided an explosion-proof balancing valve for preventing rebound, comprising:
the valve body is hollow, wherein the inner periphery of the upper end of the valve body is provided with an annular step, the middle of the inner part is provided with an outer retaining wall extending downwards, and the outer retaining wall is provided with a check hole with a through side surface;
The umbrella valve is arranged on the annular step, wherein a plurality of ventilation channels are arranged on the umbrella valve, and a ventilation film is arranged above each ventilation channel;
The screw is positioned in the outer retaining wall, the upper end of the screw is connected with the middle part of the umbrella valve, the lower end of the screw extends to the lower part of the valve body, a horizontally extending check groove is formed in the side circumference of the screw, and an outer spring is wound outside the screw;
And the check guide post is positioned in the check groove, one end of the check guide post is connected in the screw rod through a check spring, and the other end of the check guide post can extend out of the check groove and be inserted into the check hole.
In some embodiments, a plurality of hollowed-out parts are arranged inside the lower end of the valve body. The valve has the advantages that the hollow part can ensure ventilation and heat dissipation functions while meeting the structural stability of the valve body.
In some embodiments, a support ring is provided on the annular step, and the umbrella valve is mounted on the support ring. The umbrella valve has the advantages that the supporting ring can be used for stably supporting the umbrella valve.
In some embodiments, an upper seal ring is mounted in the annular step. The umbrella valve has the advantages that the upper sealing ring can seal the umbrella valve and avoid air leakage when the umbrella valve is arranged on the annular step.
In some embodiments, a lower seal ring is mounted on the circumference of the bottom surface of the valve body. The lower sealing ring is arranged to seal the valve body when the valve body is arranged on the battery pack shell.
In some embodiments, a connecting rod is arranged in the middle of the umbrella valve, and the bottom end of the connecting rod is connected with the upper end of the screw rod. The umbrella valve has the advantages that the specific structure of the umbrella valve and the connection mode with the screw rod are further described.
In some embodiments, a top of the umbrella valve is fitted with a breathable top cover. The umbrella has the advantages that the ventilation upper cover can be used for fixing and protecting the umbrella valve and the ventilation membrane on the umbrella valve, and the ventilation hole is also formed in the ventilation upper cover.
In some embodiments, a protective sleeve is provided on the exterior of the screw. The screw rod and the outer spring on the screw rod are protected by the protective sleeve, so that the screw rod and the outer spring can normally operate.
Drawings
FIG. 1 is a schematic diagram of an anti-rebound anti-explosion balance valve according to an embodiment of the present utility model;
FIG. 2 is a schematic view of the bottom structure of an explosion proof balance valve of FIG. 1;
FIG. 3 is a front cross-sectional view of an explosion proof balance valve of FIG. 1;
FIG. 4 is a partial front cross-sectional view of an explosion proof balance valve of FIG. 2;
fig. 5 is a front cross-sectional view of the explosion proof balance valve of fig. 1 in use.
In the figure: the umbrella comprises a valve body 1, an umbrella valve 2, a screw 3, a check guide post 4, an annular step 11, an outer retaining wall 12, a check hole 13, a hollowed-out part 14, a supporting ring 15, an upper sealing ring 16, a lower sealing ring 17, a ventilation channel 21, a ventilation membrane 22, a connecting rod 23, a ventilation upper cover 24, a check groove 31, an outer spring 32, a protective sleeve 33 and a check spring 41.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-4, the explosion-proof balance valve comprises a valve body 1, an umbrella valve 2, a screw 3, a check guide post 4 and other mechanisms, wherein the specific structure and the interconnection relation of the mechanisms are respectively as described.
The valve body 1 is made of plastic and can be mounted on the battery pack shell through structural designs such as threads, bolts, buckles or interference fit. Preferably, a lower seal ring 17 is mounted on the circumference of the bottom surface of the valve body 1 for sealing the mounting of the valve body 1
The valve body 1 is substantially circular, hollow in the interior thereof, and a plurality of hollowed-out portions 14 are provided in the lower end of the valve body 1 for maintaining the function of ventilation and heat dissipation. Wherein, an outer retaining wall 12 is arranged in the middle of the interior of the valve body 1, the outer retaining wall 12 is generally cylindrical, and a check hole 13 with a through side surface is arranged on the outer retaining wall 12.
A horizontal annular step 11 is provided on the inner periphery of the upper end of the valve body 1, and the outer periphery of the umbrella valve 2 is mounted on the annular step 11. In which a support ring 15 is provided on the annular step 11, the umbrella valve 2 being mounted directly on the support ring 15, and an upper sealing ring 16 being mounted in the annular step 11 for sealing.
Preferably, the interior of the umbrella valve 2 can be provided with a metal sheet by means of in-film injection molding to increase the strength thereof.
A plurality of ventilation channels 21 are arranged on the umbrella valve 2 to ensure ventilation effect, a ventilation membrane 22 is arranged above each ventilation channel 21, the ventilation membrane 22 is made of ePTFE material, and the ventilation membrane 22 can be connected with the umbrella valve 2 by means of hot melting or ultrasonic welding, etc.
Preferably, a ventilation top cover 24 is installed on top of the umbrella valve 2, and the ventilation top cover 24 is located above the ventilation membrane 22 to protect the ventilation membrane 22. The ventilation top cover 24 is made of metal or plastic and is connected to the umbrella valve 2 by ultrasonic welding. In addition, in order to ensure the ventilation effect, a plurality of ventilation holes arranged in a circular ring may be designed at the inner side of the ventilation upper cover 24.
A connecting rod 23 is arranged in the middle of the umbrella valve 2, the bottom end of the connecting rod 23 is connected with the upper end of the screw 3, and the lower end of the screw 3 extends below the valve body 1. The screw 3 is made of metal or plastic, and can be connected with the umbrella valve 2 in an interference fit, buckling or thread locking mode; the screw 3 is positioned inside the outer retaining wall 12, and an outer spring 32 is wound outside the screw 3, and the upper end of the outer spring 32 is connected to the valve body 1.
The outer spring 32 is in a stretched state in the initial state at the time of installation, so that the umbrella valve 2 and the valve body 1 are tightly connected; when a large external force acts on the umbrella valve 2 from below, the length of the outer spring 32 can be further extended and increased, and the screw 3 and the umbrella valve 2 are moved upwards, so that the umbrella valve 2 and the valve body 1 are separated to form a channel through the outside.
A horizontally extending non-return groove 31 is provided on the side circumference of the screw 3, and the non-return guide post 4 is located inside the non-return groove 31. One end of the check guide post 4 is connected to the inside of the screw 3 through a check spring 41, and the initial state of the check spring 41 is a compressed state when being installed, and forms an urging force for the check guide post 4, but the other end of the check guide post 4 is blocked by the outer retaining wall 12 and cannot move.
When the screw 3 moves up to a certain position, the outlet of the check groove 31 can be aligned with the check hole 13 on the outer retaining wall 12, and the other end of the check guide post 4 is not blocked, can be protruded outside the check groove 31 by the check spring 41, and is inserted into the check hole 13. Wherein the end of the check guide post 4 has a cambered surface so that friction with the outer retaining wall 12 can be reduced.
Preferably, a protective sleeve 33 is arranged outside the screw 3, and can be used for protecting the screw 3 and the outer spring 32.
Normally, the umbrella valve 2 is mounted in a sealed manner with the valve body 1, and the explosion-proof balance valve can only be ventilated by the umbrella valve 2, the ventilated membrane 22 and the ventilated top cover 24.
As shown in fig. 5, when a certain pressure difference is reached due to heat failure, the outer spring 32 is stretched by the force of the umbrella valve 2, and the umbrella valve 2 moves upwards and separates from the valve body 1 to form a channel which is communicated with the outside, so that the air exhaust and heat dissipation can be rapidly performed; and when a certain pressure difference is reached, the outlet of the check groove 31 is aligned with the check hole 13 on the outer retaining wall 12, so that the check guide post 4 extends out and is inserted into the check hole 13 to lock the umbrella valve 2, thereby preventing rebound thereof to influence the effect of exhaust heat dissipation.
What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.
Claims (8)
1. An explosion-proof balanced valve of anti-rebound, its characterized in that: comprising
The valve comprises a valve body (1), wherein the interior of the valve body (1) is hollow, an annular step (11) is arranged on the inner periphery of the upper end of the valve body (1), an outer retaining wall (12) extending downwards is arranged in the middle of the interior, and a check hole (13) with a through side surface is arranged on the outer retaining wall (12);
An umbrella valve (2), wherein the umbrella valve (2) is arranged on the annular step (11), a plurality of ventilation channels (21) are arranged on the umbrella valve (2), and one ventilation film (22) is arranged above each ventilation channel (21);
The screw rod (3) is positioned in the outer retaining wall (12), the upper end of the screw rod (3) is connected with the middle part of the umbrella valve (2), the lower end of the screw rod extends to the lower part of the valve body (1), a horizontally extending check groove (31) is formed in the side circumference of the screw rod (3), and an outer spring (32) is wound outside the screw rod (3);
The check guide post (4), check guide post (4) are located in the inside of check groove (31), wherein, one end of check guide post (4) is connected inside screw rod (3) through a check spring (41), and the other end can stretch out to the outside of check groove (31) and insert in check hole (13).
2. An explosion proof balance valve for preventing rebound according to claim 1, wherein: a plurality of hollowed-out parts (14) are arranged in the lower end of the valve body (1).
3. An explosion proof balance valve for preventing rebound according to claim 1, wherein: the annular step (11) is provided with a supporting ring (15), and the umbrella valve (2) is arranged on the supporting ring (15).
4. An explosion proof balance valve for preventing rebound according to claim 1, wherein: an upper sealing ring (16) is arranged in the annular step (11).
5. An explosion proof balance valve for preventing rebound according to claim 1, wherein: a lower sealing ring (17) is arranged on the circumference of the bottom surface of the valve body (1).
6. An explosion proof balance valve for preventing rebound according to claim 1, wherein: the middle part of umbrella valve (2) is provided with a connecting rod (23), the bottom of connecting rod (23) with the upper end of screw rod (3) is connected.
7. An explosion proof balance valve for preventing rebound according to claim 1, wherein: the top of the umbrella valve (2) is provided with a ventilation upper cover (24).
8. An explosion proof balance valve for preventing rebound according to claim 1, wherein: a protective sleeve (33) is arranged outside the screw (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322608172.4U CN221176550U (en) | 2023-09-25 | 2023-09-25 | Explosion-proof balance valve of preventing kick-backing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322608172.4U CN221176550U (en) | 2023-09-25 | 2023-09-25 | Explosion-proof balance valve of preventing kick-backing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221176550U true CN221176550U (en) | 2024-06-18 |
Family
ID=91537169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322608172.4U Active CN221176550U (en) | 2023-09-25 | 2023-09-25 | Explosion-proof balance valve of preventing kick-backing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221176550U (en) |
-
2023
- 2023-09-25 CN CN202322608172.4U patent/CN221176550U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |