CN219639576U - Explosion-proof valve structure and battery pack - Google Patents
Explosion-proof valve structure and battery pack Download PDFInfo
- Publication number
- CN219639576U CN219639576U CN202320627727.7U CN202320627727U CN219639576U CN 219639576 U CN219639576 U CN 219639576U CN 202320627727 U CN202320627727 U CN 202320627727U CN 219639576 U CN219639576 U CN 219639576U
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- Prior art keywords
- explosion
- proof
- distance measuring
- valve structure
- battery pack
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- 239000012528 membrane Substances 0.000 claims abstract description 57
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 239000003063 flame retardant Substances 0.000 claims description 11
- 230000009970 fire resistant effect Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 1
- 238000004880 explosion Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides an explosion-proof valve structure and a battery pack. The explosion-proof valve structure is communicated with the inside of a shell, the connecting valve body is provided with a connecting hole, an explosion-proof membrane, a thimble and a distance measuring part, the connecting hole is formed in the connecting valve body, the explosion-proof membrane is plugged in the connecting hole, the thimble is arranged on the outer side of the explosion-proof membrane, the distance measuring part is arranged on the inner side of the explosion-proof membrane, the thimble is used for puncturing the explosion-proof membrane when the explosion-proof membrane expands towards the outer side of the shell, the distance measuring part is used for detecting displacement of the explosion-proof membrane, and a protective shell is arranged on the outer side of the connecting valve body. The explosion-proof valve structure can reduce the explosion risk of the battery pack.
Description
Technical Field
The utility model relates to the technical field of battery packs, in particular to an explosion-proof valve structure. In addition, the utility model also relates to a battery pack.
Background
With the rise of new energy automobiles, the design of battery packs is strived for, and the safety design of battery packs has become a hot spot problem in current researches, wherein the thermal runaway safety of battery packs is the research direction of most attention of researchers.
Most of the traditional battery packs are provided with pressure sensors, the pressure sensors are used for monitoring the pressure change of the battery packs after thermal runaway, and then the pressure sensors are used for transmitting pressure change signals to the vehicle and giving an alarm, however, the pressure sensors can only detect the pressure change and the alarm in the battery packs and cannot process the thermal runaway condition of the battery packs, and the battery packs still have very high explosion risks.
Disclosure of Invention
In view of the above, the present utility model aims to provide an explosion-proof valve structure for reducing the explosion risk of a battery pack.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
an explosion-proof valve structure is arranged on a shell of a battery pack and comprises a connecting valve body connected with the shell, a connecting hole formed in the connecting valve body, an explosion-proof membrane plugged in the connecting hole, a thimble arranged on the outer side of the explosion-proof membrane and a distance measuring part arranged on the inner side of the explosion-proof membrane; when the explosion-proof membrane expands towards the outside of the shell, the ejector pin is used for puncturing the explosion-proof membrane, and the distance measuring part is used for detecting the displacement of the explosion-proof membrane.
Further, a protective shell is arranged on the outer side of the connecting valve body.
Further, the distance measuring part is an infrared distance measuring sensor.
Further, a fire-resistant net is arranged on the outer side of the connecting hole, and the fire-resistant net covers the inner side of the explosion-proof membrane.
Further, the fire-retarding net is provided with mounting holes, and the distance measuring part is in threaded connection with the mounting holes.
Further, a thread compound is arranged at the joint of the distance measuring part and the fire-retarding net.
Compared with the prior art, the utility model has the following advantages:
according to the explosion-proof valve structure, after thermal runaway occurs in the shell, the pressure in the shell is increased, the explosion-proof membrane is extruded to move towards the ejector pin, the ejector pin can puncture the explosion-proof membrane after the explosion-proof membrane is contacted with the ejector pin, and gas in the shell is discharged through the connecting hole, so that the pressure in the shell is relieved, the pressure in the shell is kept to be normal, and the risk of explosion of the shell due to overlarge pressure is greatly reduced.
Secondly, set up the range finding portion in the rupture membrane inboard, detect the displacement of rupture membrane through the range finding portion, increase in casing internal pressure and extrude the rupture membrane and remove the back, range finding portion can detect the displacement of rupture membrane to pass through the battery package with the displacement signal transmission of rupture membrane to vehicle VCU, and report to the police to the interior personnel of car by vehicle VCU, in order to remind the interior personnel of car to escape, thereby protect the safety of interior personnel of car in the at utmost.
Furthermore, through setting up the fire-retardant net in the connecting hole outside, can protect the rupture membrane difficult by burning to connect range finding portion on the fire-retardant net, rethread screw thread glue strengthens range finding portion and fire-retardant net's joint strength, guarantees that range finding portion is difficult for breaking away from with the fire-retardant net.
Another object of the present utility model is to provide a battery pack, which includes a housing, and the explosion-proof valve structure is disposed on the battery pack.
Further, the battery pack further comprises a battery management system, and the distance measuring part transmits a displacement signal of the rupture disc to the battery management system.
Further, the distance measuring part is connected with a main control wiring harness of the battery management system through a connecting wiring harness.
Further, the end part of the main control wire harness, which is close to the connecting wire harness, is provided with a first clamping piece, the end part of the connecting wire harness, which is close to the main control wire harness, is provided with a second clamping piece, a clamping hole is formed in the first clamping piece, and the second clamping piece is spliced with the clamping hole.
The battery pack has the technical advantages that the explosion-proof valve structure has, after the internal pressure of the shell on the battery pack is increased, the shell can be decompressed through the connecting hole on the connecting valve body, so that the safety of the battery pack is ensured, the distance measuring part transmits the displacement signal of the explosion-proof membrane to the battery management system, and the battery management system transmits the displacement signal to the vehicle VCU to warn personnel in the vehicle so as to protect the safety of the personnel in the vehicle.
Secondly, set up first fastener and second fastener between connecting pencil and master control pencil, can make things convenient for first fastener of dismouting and second fastener.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model, wherein the words of front and back, top and bottom, etc. are used to indicate relative position and are not intended to limit the utility model unduly. In the drawings:
FIG. 1 is a schematic view of an explosion-proof valve structure according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an explosion structure of an explosion-proof valve according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a battery pack according to a second embodiment of the utility model;
fig. 4 is a schematic diagram of a connection structure between a battery management system and a ranging part of an explosion-proof valve structure according to a second embodiment of the present utility model;
reference numerals illustrate:
1. a connection hole; 2. an explosion-proof membrane; 3. a thimble; 4. connecting the valve body; 5. a protective shell; 6. a distance measuring section; 7. connecting the wire harness; 8. a main control wire harness; 9. a first clamping piece; 10. a second clamping piece; 11. a clamping hole; 12. fire-retardant net; 13. a housing.
Detailed Description
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", etc., are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model; if the terms "first," "second," etc. are used herein, they are used for descriptive purposes only and not to be construed as indicating or implying relative importance.
Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.
The utility model will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
The embodiment relates to an explosion-proof valve structure, which is arranged on a shell 13 of a battery pack and can reduce the explosion risk of the battery pack; an exemplary configuration of which is shown in fig. 1-2.
In general, the explosion-proof valve structure comprises a connecting valve body 4 communicated with a shell 13, a connecting hole 1 formed in the connecting valve body 4, an explosion-proof membrane 2 plugged in the connecting hole 1, a thimble 3 arranged outside the explosion-proof membrane 2, and a distance measuring part 6 arranged inside the explosion-proof membrane 2, wherein when the explosion-proof membrane 2 expands towards the outside of the shell 13, the thimble 3 is used for puncturing the explosion-proof membrane 2.
Based on the above arrangement, the connection valve body 4 is preferably mounted on the bottom of the housing 13, but may be mounted on the side of the housing 13. In the implementation, thermal runaway takes place in the casing 13 and makes casing 13 inside pressure increase, and the inside gas of casing 13 can extrude rupture membrane 2 and remove towards thimble 3 to make thimble 3 puncture rupture membrane 2, the inside gas of casing 13 can be through connecting hole 1 pressure release, thereby reduces casing 13 inside pressure, finally reduces the risk of casing 13 explosion.
In this embodiment, the distance measuring unit 6 is preferably an infrared distance measuring sensor, after the pressure inside the casing 13 increases due to various reasons, the casing 13 will squeeze the rupture membrane 2 to move towards the thimble 3, after the rupture membrane 2 moves towards the thimble 3 to reach a preset value, the distance measuring unit 6 converts the displacement signal of the rupture membrane 2 into an electric signal and transmits the electric signal to the battery management system of the battery pack, the battery management system transmits an alarm signal to the vehicle VCU (VCU is a core electronic control unit for realizing the vehicle control decision), and the vehicle VCU controls an alarm device (the alarm device may be a conventional device such as a horn with a beep) in the vehicle to remind personnel in the vehicle, and escape in advance, thereby protecting the safety of the personnel in the vehicle. Wherein, the preset value of the displacement of the rupture disc 2 towards the thimble 3 can be adjusted by the distance measuring part 6.
Wherein, connecting hole 1 is by connecting valve body 4 shaping, and connecting hole 1 is seted up on connecting valve body 4, and connecting valve body 4 fixed mounting is in the bottom of casing 13 to make connecting hole 1 and the inside intercommunication of casing 13, the shape of rupture membrane 2 is slightly bigger than the shape of connecting hole 1, so that rupture membrane 2 and connecting hole 1 bond, and thimble 3 can be fixed in the outside of connecting valve body 4, and the pointed end of thimble 3 stretches into in the connecting hole 1.
In addition, a protective shell 5 is arranged on the outer side of the connecting valve body 4 to protect the thimble 3 and the explosion-proof membrane 2 at the connecting hole 1.
The inner side of the rupture disk 2 means the side of the rupture disk 2 facing the inside of the case 13, and the outer side of the rupture disk 2 means the side of the rupture disk 2 facing the outside of the case 13.
The distance measuring part 6 is connected with a main control wire harness 8 of the battery management system through a connecting wire harness 7, so that the distance measuring part 6 transmits a displacement signal of the explosion-proof membrane 2 to the battery management system through the connecting wire harness 7 and the main control wire harness 8.
In the present embodiment, the fire-blocking net 12 is provided outside the connection hole 1, and the fire-blocking net 12 covers the inside of the explosion-proof membrane 2 to protect the explosion-proof membrane 2 from being burned.
In addition, the ranging part 6 is in threaded connection with the side surface of the fire-retardant net 12, specifically, a mounting hole is formed in the side surface of the fire-retardant net 12, a screw is fixed on the infrared ranging sensor, the infrared ranging sensor is connected with the mounting hole on the fire-retardant net 12 through the screw, and a thread compound is smeared at the screw and the mounting hole, so that the connection strength of the infrared ranging sensor and the fire-retardant net 12 is enhanced.
It should be noted that the detection end of the infrared ranging sensor faces the rupture membrane 2, and the light beam emitted from the infrared ranging sensor can be irradiated onto the rupture membrane 2 through the mesh on the fire-retardant net 12 to detect the displacement of the rupture membrane 2.
The working process of the rupture disk 2 structure of this embodiment is as follows:
after thermal runaway occurs in the shell 13, the pressure in the shell 13 is increased to extrude the explosion-proof membrane 2 to move towards the thimble 3, after the explosion-proof membrane 2 contacts with the thimble 3, the thimble 3 punctures the explosion-proof membrane 2, and gas in the shell 13 can be discharged to the outside of the shell 13 through the connecting hole 1, so that the pressure in the shell 13 is reduced, and the risk of explosion of the shell 13 is reduced.
When the pressure in the shell 13 is increased, the rupture membrane 2 moves towards the thimble 3, after the distance that the rupture membrane 2 moves towards the thimble 3 reaches a preset value, the distance measuring part 6 converts a displacement signal that the rupture membrane 2 moves towards the thimble 3 into an electric signal, and the electric signal is transmitted to a battery management system through the connecting wire harness 7 and the main control wire harness 8, and the battery management system transmits the signal to the VCU of the vehicle to remind passengers of safety.
Example two
The present embodiment as shown in fig. 3-4 relates to a battery pack, which adopts the explosion-proof valve structure provided in the first embodiment to ensure the safety of the battery pack and the safety of personnel in the vehicle.
The battery pack further includes a battery management system, and the distance measuring unit 6 transmits the displacement signal of the rupture membrane 2 to the battery management system, and the battery management system transmits the displacement signal of the rupture membrane 2 to the vehicle VCU. The distance measuring unit 6 is connected to a main harness 8 of the battery management system via a connection harness 7.
In addition, be provided with first fastener 9 near the tip of connecting pencil 7 at master control pencil 8, connecting pencil 7 is provided with second fastener 10 near the tip of master control pencil 8 to set up card hole 11 on first fastener 9, make second fastener 10 insert in card hole 11, in order to make second fastener 10 peg graft with card hole 11, make things convenient for first fastener 9 and second fastener 10 dismouting, and have fine connection effect. The inside of card hole 11 and the outside of second fastener 10 all are provided with the sheetmetal, and after second fastener 10 pegged graft with card hole 11, the sheetmetal on the card hole 11 and the sheetmetal butt on the second fastener 10 to make connection pencil 7 and master control pencil 8 can realize the signal transmission.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. An explosion-proof valve structure locates on the casing of battery package, its characterized in that:
the explosion-proof valve structure comprises a connecting valve body, a connecting hole, an explosion-proof membrane, a thimble and a distance measuring part, wherein the connecting valve body is communicated with the inside of the shell;
when the explosion-proof membrane expands towards the outside of the shell, the ejector pin is used for puncturing the explosion-proof membrane, and the distance measuring part is used for detecting the displacement of the explosion-proof membrane.
2. The explosion-proof valve structure according to claim 1, wherein:
and a protective shell is arranged on the outer side of the connecting valve body.
3. The explosion-proof valve structure according to claim 1, wherein:
the distance measuring part is an infrared distance measuring sensor.
4. A blast valve construction according to any of claims 1-3, wherein:
and a fire-resistant net is arranged outside the connecting hole and covers the inner side of the explosion-proof membrane.
5. The explosion-proof valve structure according to claim 4, wherein:
and the fire-retarding net is provided with mounting holes, and the distance measuring part is in threaded connection with the mounting holes.
6. The explosion-proof valve structure according to claim 5, wherein:
and a thread glue is arranged at the joint of the distance measuring part and the fire-retardant net.
7. A battery pack comprising a housing, characterized in that:
the explosion-proof valve structure as claimed in any one of claims 1 to 6 is arranged on the shell.
8. The battery pack according to claim 7, wherein:
the battery pack further comprises a battery management system, and the distance measuring part transmits a displacement signal of the rupture disc to the battery management system.
9. The battery pack of claim 8, wherein:
the distance measuring part is connected with a main control wiring harness of the battery management system through a connecting wiring harness.
10. The battery pack according to claim 9, wherein:
the end part of the main control wire harness, which is close to the connecting wire harness, is provided with a first clamping piece, the end part of the connecting wire harness, which is close to the main control wire harness, is provided with a second clamping piece, a clamping hole is formed in the first clamping piece, and the second clamping piece is spliced with the clamping hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320627727.7U CN219639576U (en) | 2023-03-27 | 2023-03-27 | Explosion-proof valve structure and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320627727.7U CN219639576U (en) | 2023-03-27 | 2023-03-27 | Explosion-proof valve structure and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219639576U true CN219639576U (en) | 2023-09-05 |
Family
ID=87817517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320627727.7U Active CN219639576U (en) | 2023-03-27 | 2023-03-27 | Explosion-proof valve structure and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219639576U (en) |
-
2023
- 2023-03-27 CN CN202320627727.7U patent/CN219639576U/en active Active
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