CN216045754U - Explosion-proof valve and battery fire extinguishing system thereof - Google Patents
Explosion-proof valve and battery fire extinguishing system thereof Download PDFInfo
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- CN216045754U CN216045754U CN202121254803.1U CN202121254803U CN216045754U CN 216045754 U CN216045754 U CN 216045754U CN 202121254803 U CN202121254803 U CN 202121254803U CN 216045754 U CN216045754 U CN 216045754U
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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
Abstract
The utility model relates to an explosion-proof valve and a battery fire-fighting system thereof. Explosion-proof valve, which comprises a housin, be provided with explosion-proof structure on the casing, casing one end is open to be connected with the battery package, be provided with passive trigger assembly in the casing, passive trigger assembly includes the subassembly shell, induction coil, magnet, elastic component and temperature sensing fusible fixed knot construct, temperature sensing fusible fixed knot constructs the setting on the subassembly shell, induction coil fixes in the subassembly shell, magnet sets up in induction coil, magnet can be along induction coil's length direction reciprocating motion, magnet and temperature sensing fusible fixed knot construct and be connected, the elastic component is connected with magnet and has the trend that makes magnet take place the motion. According to the explosion-proof valve, the functions of the passive trigger assembly and the explosion-proof valve are integrated, so that additional equipment is avoided, and the simplicity of the interior of a battery pack is ensured. Under the condition of no power supply, a starting electric signal can be provided for the fire fighting device, and the thermal runaway phenomenon of the battery pack can be controlled as soon as possible.
Description
Technical Field
The utility model relates to the technical field of fire fighting equipment, in particular to an explosion-proof valve and a battery fire fighting system thereof.
Background
With the popularization of new energy automobiles, the yield of the battery pack of the core component of the new energy automobile is increased, and the safety of the battery pack is paid more and more attention. When the lithium battery is out of control thermally, a large amount of high-temperature combustible flue gas and high-temperature particulate matters are sprayed out of the lithium battery, the pressure of the high-temperature flue gas containing gas and solid particulate matters in the battery storage unit/cabin/battery pack and the like can be rapidly increased, when the pressure exceeds the pressure bearing capacity of the battery storage unit/cabin/battery pack shell structure, the high-temperature flue gas can be broken and released, and after the high-temperature flue gas is mixed with air, jet combustion, flashover and even explosion can be easily caused.
In order to prevent the emergence of above-mentioned problem, current technique can set up fire extinguishing device for the battery package usually, still is provided with the sensor in the battery package, sensor and fire extinguishing device electric connection, and when the battery package took place the thermal runaway condition, the sensor produced the signal passback and made its start for fire extinguishing device, stops the thermal runaway phenomenon in the battery package. However, the sensor needs to be powered, when a thermal runaway phenomenon occurs in the battery pack, a problem may occur in a power supply line, so that the sensor cannot normally feed back a signal to the fire extinguishing device, and finally, an inconceivable result may be caused. Therefore, a technical scheme that signals can be stably and timely transmitted to a fire extinguishing device when thermal runaway occurs in the battery pack is urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides an explosion-proof valve and a battery fire-fighting system thereof.
The specific technical scheme of the utility model is as follows:
on one hand, the utility model introduces an explosion-proof valve which comprises a shell, wherein an explosion-proof structure is arranged on the shell, one end of the shell is opened and connected with a battery pack, a passive trigger assembly is arranged in the shell and comprises an assembly shell, an induction coil, a magnet, an elastic piece and a temperature-sensing fusible fixing structure, the temperature-sensing fusible fixing structure is arranged on the assembly shell, the induction coil is fixed in the assembly shell, the magnet is arranged in the induction coil and can reciprocate along the length direction of the induction coil, the magnet is connected with the temperature-sensing fusible fixing structure, and the elastic piece is connected with the magnet and has a tendency of enabling the magnet to move.
In one embodiment, the passive triggering assembly further includes a connecting assembly, one end of the connecting assembly is connected to the temperature-sensing fusible fixing structure, and the other end of the connecting assembly is connected to the magnet.
In one embodiment, the coupling assembly is a tractor.
In one embodiment, the temperature-sensing fusible fixing structure is arranged at the middle section of the outer side of the induction coil, and the traction piece extends out of one end of the induction coil and winds back to be connected with the temperature-sensing fusible fixing structure.
In one embodiment, an opening communicated with the battery pack is arranged at the position of the component shell corresponding to the temperature-sensing fusible fixing structure.
In one embodiment, the passive triggering assembly further comprises a heat conducting assembly, the heat conducting assembly is connected with the temperature-sensing fusible fixing structure, and the heat conducting assembly extends out of the assembly shell.
In one embodiment, the passive trigger assembly is movably connected to the housing.
In one embodiment, the explosion-proof structure is an explosion-proof valve membrane, the explosion-proof valve membrane is arranged inside the shell, the shell is provided with a vent hole communicated with the explosion-proof valve membrane, and the shell is further provided with a membrane puncturing device which can be in contact with the explosion-proof valve membrane.
In one embodiment, the induction coil is arranged with its axis parallel to the plane of the explosion-proof valve membrane. On the other hand, the utility model discloses a battery fire-fighting system which comprises any one of the explosion-proof valve, a fire-fighting device and a fire-fighting device controller, wherein the fire-fighting device controller is respectively electrically connected with the induction coil of the explosion-proof valve and the fire-fighting device.
Advantageous effects
According to the explosion-proof valve, the functions of the passive trigger assembly and the explosion-proof valve are integrated, so that additional equipment is prevented from being additionally arranged in the battery pack, and the simplicity of the interior of the battery pack is ensured. Under the condition of no power supply, a starting electric signal can be provided for the fire fighting device, and the thermal runaway phenomenon of the battery pack can be controlled as soon as possible.
Drawings
FIG. 1 is a schematic view of an explosion-proof valve according to an embodiment of the present application;
FIG. 2 is a schematic view from another perspective of an explosion proof valve according to an embodiment of the present application;
FIG. 3 is a schematic illustration of yet another perspective of an explosion proof valve according to an embodiment of the present application;
FIG. 4 is a cross-sectional view of the explosion vent valve at AA in FIG. 3;
the explosion-proof valve comprises a shell 1, an explosion-proof valve membrane 2, a passive trigger component 3, a vent hole 11, a membrane puncturing device 12, a component shell 31, an electric wire leading-out hole 32, a temperature-sensing fusible fixing structure 33, a magnet 34, an induction coil 35, an elastic component 36 and a connecting component 38.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The explosion-proof valve of the utility model is shown in figures 1 and 2, and comprises a shell 1, an explosion-proof valve membrane 2 is arranged on the shell 1, one end of the shell 1 is opened and connected with a battery pack, as shown in fig. 1, a passive triggering assembly 3 is arranged in the shell 1, as shown in fig. 4, a cross-sectional view of the explosion-proof valve in fig. 3 is shown in an AA section, the passive trigger component 3 comprises a component shell 31, an induction coil 35, a magnet 34, an elastic piece 36 and a temperature-sensing fusible fixing structure 33, the temperature sensitive fusible fixing structure 33 is disposed on the assembly housing 31, the induction coil 35 is fixed in the assembly housing 31, the magnet 34 is disposed in the induction coil 35, the magnet 34 is capable of reciprocating along a length direction of the induction coil 35, the magnet 34 is connected with the temperature-sensitive fusible fixing structure 33, and the elastic piece 36 is connected with the magnet 34 and has a tendency to move the magnet 34; the induction coil 35 is electrically connected to the fire fighting device controller.
Compared with the dangerous situation that if the sensor loses power supply and the battery pack generates thermal runaway, the sensor can not transmit signals to the fire-fighting device, so that the thermal runaway phenomenon can not be timely and effectively controlled, by arranging the passive trigger component 3 in the explosion-proof valve, once the thermal runaway of the battery pack occurs, because the explosion-proof valve is weak, high-pressure and high-temperature gas can be collected to the explosion-proof valve, the temperature-sensing fusible fixing structure 33 of the passive trigger component 3 is influenced by high heat of the high-pressure and high-temperature gas, the temperature is rapidly increased to reach a melting point and the melting is started, the magnet 34 connected to the temperature sensitive fusible fixing structure 33 is thus disconnected from the fixing, the magnet 34 converts the elastic potential energy of the elastic member 36 into kinetic energy under the action of the elastic member 36, so that the magnet 34 moves along the length direction of the induction coil 35. According to Faraday's law of electromagnetic induction, in the moving process of the magnet 34, the induction coil 35 makes a motion of cutting a magnetic induction line in a magnetic field, so that the induction coil 35 generates an induction current, and as the induction coil 35 is electrically connected with an external fire fighting device controller, the fire fighting device controller receives the induction current, namely a starting electric signal, so that the fire fighting device can be started, and the thermal runaway condition in the battery pack is restrained through the fire fighting device.
It will be appreciated that the temperature sensitive fusible fixing structure 33 can have various implementations, for example, the temperature sensitive fusible fixing structure 33 can be directly fixed at one end to the assembly housing 31 and at the other end to one end of the magnet 34. Preferably, in the embodiment shown in fig. 4, the passive triggering assembly 3 further includes a connecting assembly 38, one end of the connecting assembly 38 is connected to the temperature-sensitive fusible fixing structure 33, and the other end of the connecting assembly 38 is connected to the magnet 34. By arranging the connecting component 38 to be indirectly connected with the magnet 34, when a part of the temperature-sensing fusible fixing structure 33 is melted, the fixing effect on the connecting component 38 is lost, so that the moving time of the magnet 34 in the induction coil 35 is further advanced, a starting electric signal is sent out in advance, and the fire fighting device is favorable for restraining the thermal runaway phenomenon of the battery pack as soon as possible. Specifically, in some embodiments, the connecting assembly 38 is a pulling member, and in these embodiments, the magnet 34 can be moved away from the temperature sensitive fusible fixing structure 33 by the elastic member 36. In other embodiments, the connecting assembly 38 is a support, and in these embodiments, the magnet 34 can move toward the temperature-sensitive fusible fixing structure 33 under the action of the elastic member 36.
Preferably, when the connecting assembly 38 is a pulling member, the temperature-sensitive fusible fixing structure 33 is disposed at an outer middle section of the induction coil 35, and the pulling member extends out from one end of the induction coil 35 and is connected to the temperature-sensitive fusible fixing structure 33 in a winding manner. The arrangement mode fully considers the convenience of the passive trigger assembly 3 in the assembling process, and compared with the condition that the temperature-sensing fusible fixing structure 33 is directly arranged at the end part of the induction coil 35, the arrangement mode reduces the difficulty of connecting the traction piece, the temperature-sensing fusible fixing structure 33 and the magnet.
Preferably, in the embodiment shown in fig. 4, the induction coil 35 is arranged parallel to the plane of the explosion-proof valve membrane 2. Because induction coil 35's length is longer than explosion-proof valve's size, is on a parallel with when explosion-proof valve membrane 2 sets up, can utilize explosion-proof valve's inner space more effectively to under the prerequisite that explosion-proof valve body size does not have the detail increase, with passive trigger subassembly 3 integration, avoided additionally increasing equipment in the battery package, guaranteed that the battery package is inside succinct.
Preferably, the assembly housing 31 is provided with an opening corresponding to the temperature sensitive fusible fixing structure 33 and communicated with the battery pack. Through the opening, the temperature-sensing fusible fixing structure 33 can directly contact with high-temperature gas, so that the temperature rise speed is increased to enable the temperature-sensing fusible fixing structure to reach a melting point as early as possible, the melting speed is further increased to enable the magnet 34 to be separated from the temperature-sensing fusible fixing structure 33 more quickly, and generated induced current is transmitted to the fire fighting device more early.
Preferably, the passive triggering component 3 may further include a heat conducting component, the heat conducting component is connected to the temperature-sensitive fusible fixing structure 33, and the heat conducting component extends out of the component housing 31. The heat conducting component is made of a material with high heat conductivity, so that heat in the environment can be rapidly collected, and melting of the temperature-sensing fusible fixing structure 33 is accelerated.
Specifically, in one embodiment, the temperature sensitive fusible fixing structure 33 is made of fusible metal.
Specifically, the passive trigger component 3 is movably connected with the housing 1. According to the arrangement, on one hand, the passive trigger assembly 3 can be independently assembled and then arranged in the shell 1 after the assembly is completed, so that the processing process is simplified, and on the other hand, if the passive trigger assembly 3 or the shell 1 or the explosion-proof valve membrane 2 breaks down, the broken-down assembly can be replaced, so that the cost can be reduced.
It is obvious that said elastic element 36 has many implementations, for example it can be a compression spring or an extension spring or a compression rubber or a landing pad. Preferably, in one embodiment, the magnet is provided with elastic members 36 on both sides, and the elastic members 36 on both sides have a tendency to move the magnet back and forth in the coil. With this arrangement, when the temperature sensitive fusible fixing structure 33 is melted, the magnet is released and continuously moves in the coil to generate an electric signal, so that the reliability of the explosion-proof valve of the present invention can be improved.
Specifically, the housing 1 is further provided with a wire outlet hole 32, and a wire connecting the induction coil 35 and the fire fighting device controller is led out from the wire outlet hole 32.
Specifically, the explosion-proof valve membrane 2 is arranged in the housing 1, the housing 1 is provided with an air vent 11 communicated with the explosion-proof valve membrane 2, the housing 1 is further provided with a membrane puncturing device 12, and the membrane puncturing device 12 can be in contact with the explosion-proof valve membrane 2. When the battery pack is out of control due to heat, a large amount of gas can be generated in the battery pack, the pressure in the battery pack is increased, and the explosion-proof valve membrane 2 expands towards the outer side of the battery pack due to different internal and external pressures.
In another aspect of the present invention, a battery fire fighting system is introduced, which includes the above-mentioned explosion-proof valve, a fire fighting device and a fire fighting device controller, wherein the explosion-proof valve is disposed on the battery pack, and the fire fighting device controller is electrically connected to the induction coil 35 of the explosion-proof valve and the fire fighting device, respectively. When the battery pack is out of control due to heat, the temperature-sensing fusible fixing structure is melted by high-temperature and high-pressure gas, the magnet moves in the induction coil 35 to generate induction current, namely a starting electric signal, the fire-fighting device controller receives the starting electric signal to control the fire-fighting device to start, extinguish fire and cool the interior of the battery pack, and plays a role in inhibiting the fire. Meanwhile, the high-temperature high-pressure gas extrudes the explosion-proof valve membrane, the explosion-proof valve membrane is contacted with the membrane puncture device 12 to be cracked, the high-pressure gas is sprayed out of the explosion-proof valve membrane, the internal pressure of the battery pack is reduced, and the thermal runaway condition of the battery pack is synchronously restrained.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides an explosion-proof valve, its characterized in that, includes the casing, be provided with explosion-proof structure on the casing, casing one end is open to be connected with the battery package, be provided with passive trigger assembly in the casing, passive trigger assembly includes subassembly shell, induction coil, magnet, elastic component and temperature sensing fusible fixed knot structure, temperature sensing fusible fixed knot constructs the setting on the subassembly shell, induction coil fixes in the subassembly shell, magnet sets up in the induction coil, magnet can along induction coil's length direction reciprocating motion, magnet with temperature sensing fusible fixed knot constructs the connection, the elastic component with magnet is connected and has the messenger magnet takes place the trend of motion.
2. The explosion proof valve of claim 1 wherein said passive activation assembly further comprises a coupling assembly, one end of said coupling assembly being coupled to said temperature sensitive fusible attachment structure and the other end of said coupling assembly being coupled to said magnet.
3. The explosion proof valve of claim 2 wherein said attachment assembly is a pull member.
4. The explosion vent as set forth in claim 3, wherein said temperature sensitive fusible link structure is disposed at an outer middle section of the induction coil, and said pulling member extends from one end of the induction coil and is connected to said temperature sensitive fusible link structure by being wound back.
5. The explosion proof valve of claim 1 wherein the assembly housing is provided with an opening in communication with a battery pack at a location corresponding to the temperature sensitive fusible fastening structure.
6. The explosion vent valve of claim 1, wherein the passive activation assembly further comprises a thermally conductive assembly coupled to the temperature sensitive fusible attachment structure, the thermally conductive assembly extending out of the assembly housing.
7. The explosion proof valve of claim 1 wherein said passive trigger assembly is movably connected to said housing.
8. The explosion-proof valve as recited in claim 1 wherein the explosion-proof structure is an explosion-proof valve membrane disposed within the housing, the housing having a vent hole disposed therein in communication with the explosion-proof valve membrane, the housing further having a membrane puncturing device disposed thereon, the membrane puncturing device being contactable with the explosion-proof valve membrane.
9. An explosion proof valve as claimed in claim 8 wherein the induction coil is arranged with its axis parallel to the plane of the explosion proof valve membrane.
10. A battery fire protection system comprising the explosion-proof valve of any one of claims 1 to 9, a fire protection device and a fire protection device controller, the fire protection device controller being electrically connected to the induction coil of the explosion-proof valve and the fire protection device, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121254803.1U CN216045754U (en) | 2021-06-07 | 2021-06-07 | Explosion-proof valve and battery fire extinguishing system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121254803.1U CN216045754U (en) | 2021-06-07 | 2021-06-07 | Explosion-proof valve and battery fire extinguishing system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN216045754U true CN216045754U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121254803.1U Active CN216045754U (en) | 2021-06-07 | 2021-06-07 | Explosion-proof valve and battery fire extinguishing system thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114597518A (en) * | 2022-03-16 | 2022-06-07 | 广汽埃安新能源汽车有限公司 | Trigger device for thermal runaway of battery |
| CN116799422A (en) * | 2023-08-23 | 2023-09-22 | 江西五十铃汽车有限公司 | Driving safety guarantee device for new energy automobile |
-
2021
- 2021-06-07 CN CN202121254803.1U patent/CN216045754U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114597518A (en) * | 2022-03-16 | 2022-06-07 | 广汽埃安新能源汽车有限公司 | Trigger device for thermal runaway of battery |
| CN114597518B (en) * | 2022-03-16 | 2023-06-23 | 广汽埃安新能源汽车有限公司 | Triggering device for thermal runaway of battery |
| CN116799422A (en) * | 2023-08-23 | 2023-09-22 | 江西五十铃汽车有限公司 | Driving safety guarantee device for new energy automobile |
| CN116799422B (en) * | 2023-08-23 | 2024-01-26 | 江西五十铃汽车有限公司 | Driving safety guarantee device for new energy automobile |
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