CN113908470B - Heat pipe containing gas generating device for battery and fire extinguishing method thereof - Google Patents
Heat pipe containing gas generating device for battery and fire extinguishing method thereof Download PDFInfo
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- CN113908470B CN113908470B CN202111158674.0A CN202111158674A CN113908470B CN 113908470 B CN113908470 B CN 113908470B CN 202111158674 A CN202111158674 A CN 202111158674A CN 113908470 B CN113908470 B CN 113908470B
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- heat pipe
- gas generating
- phosphate
- pipe body
- fire
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
- A62C37/10—Releasing means, e.g. electrically released
- A62C37/11—Releasing means, e.g. electrically released heat-sensitive
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
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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 invention provides a heat pipe containing a gas generating device for a battery and a fire extinguishing method thereof, belonging to the technical field of energy storage batteries. The gas generating device has simple structure, and has no influence on the structure of the battery and the structure of the heat pipe, namely the original structure and the volume of the battery.
Description
Technical Field
The invention belongs to the technical field of energy storage batteries, relates to a safety technology of an energy storage battery, and particularly relates to a heat pipe containing a gas generating device for a battery and a fire extinguishing method of the heat pipe.
Background
In recent years, lithium battery technology has been rapidly developed, and lithium batteries have been applied to more and more fields. The lithium battery can produce heat in the working process, if the heat produced in the repeated use process is too large, the heat can not be effectively emitted, the use stability of the lithium battery can be influenced, the service life of the lithium battery can be shortened, when the temperature is further increased, the lithium battery can be out of control, electrolyte in the lithium battery can be decomposed to produce combustible gas, and the combustible gas is continuously gathered to have the risks of explosion and ignition. Therefore, safety in use of lithium batteries has been a concern.
Aiming at the fire disaster generated after the thermal runaway of the lithium battery in the current market, the main treatment method is a traditional fire extinguishing method of the extinguishing agent, but the method can only extinguish the fire source outside the battery and can not extinguish the fire from the source inside the battery, so that the fire still exists inside the battery after the fire is extinguished outside the battery, and the secondary re-burning risk of the battery exists.
The invention patent with the publication number of CN111912268A discloses a heat pipe with heat conduction and fire protection functions, the bottom of the heat pipe is connected with a container, a medium is stored in the container, a release pipe group is arranged on the container, and a valve is arranged on the release pipe group. By adopting the structure, heat can be conducted at normal temperature, and when the battery pack fails to heat, the medium in the container can be sprayed into the battery pack, so that the purposes of cooling and extinguishing fire are achieved. Although the heat pipe can be arranged in the battery pack, when the battery is out of control, the medium is sprayed out of the container to extinguish the fire in the battery, but the structure of the release pipe group in the patent is complex, is not in line with the ideas of compact structure and small volume requirement of the lithium battery, and is not suitable for practical use.
Disclosure of Invention
Aiming at the problems that the fire extinguishing medium release pipe group is complex in structure and not suitable for practical use when the fire is extinguished in the battery in the prior art, the invention provides a heat pipe containing a gas generating device for the battery and a fire extinguishing method thereof.
The invention is that a gas generating device is arranged in a hollow structure of a heat pipe body, a gas generating agent and a temperature sensing initiator are arranged in the gas generating device, when the temperature sensing initiator senses that the temperature of a heat conducting medium in the heat pipe body exceeds a limit value, the temperature sensing initiator in the temperature sensing initiator reacts to release heat, the gas generating agent in the gas generating agent is promoted to react and generate a large amount of gas, so that the gas generating device is filled with a large amount of gas, when the gas pressure is large enough, the gas generating device is broken through and is converged into an inner cavity of the heat pipe body, the pressure in the inner cavity of the heat pipe body is increased, an opening is generated from a weak part on the heat pipe body, and the fire-fighting heat conducting medium is converged into the battery to extinguish the fire in the battery. The gas generating device has simple structure and does not have great influence on the structure of the battery and the structure of the heat pipe; the specific technical scheme is as follows:
the heat pipe comprises a heat pipe body, wherein a heat conducting working medium in the heat pipe body is a fire-fighting heat conducting medium, and the gas generating device is arranged in a hollow structure of the heat pipe body.
Further limited, the gas generating device comprises a packaging shell, a temperature sensing initiator and a gas generating agent, wherein the packaging shell is arranged in the hollow structure of the heat pipe body, the temperature sensing initiator and the gas generating agent are both arranged in the packaging shell, and the temperature sensing initiator is used for triggering the gas generating agent to generate gas.
Further defined, the temperature-sensitive initiator is attached to the inner wall of the package housing.
Further defined, the temperature sensitive initiator is attached to a top wall, a bottom wall or a side wall within the enclosure.
Further defined, the package housing is disposed at the bottom of the hollow structure of the heat pipe body.
Further defined, a concave clamping groove is formed in the pipe wall of the heat pipe body, and the concave clamping groove is in contact with the top of the packaging shell.
Further defined, the enclosure is disposed below the wick of the heat pipe body.
Further defined, a weak portion is provided on a tube wall of the heat pipe body.
Further defined, the frangible portion is a frangible hole, a linear score groove, or an annular score groove.
Further defined, the enclosure is a metal enclosure or a plastic enclosure, and the enclosure is compatible with a fire protection heat transfer medium.
Further defined, the metal shell is a copper shell or an aluminum shell.
It is further defined that, the fire-fighting heat-conducting medium is perfluoro ketone, pentafluoroethane, difluoromethane, difluoro-chloromonobromomethane, trifluoro-monobromomethane, tetrafluorodibromoethane, heptafluoropropane, trifluoromethane, difluoro-bromomethane, monochloromonobromomethane, difluoro-dibromomethane, ammonia water, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, fluoroalkyl phosphate, cresyl diphenyl phosphate, diphenyl monooctyl triphenyl phosphate, tributyl phosphate, trimethyl phosphate, isopropylphenyl diphenyl phosphate, tris (4-methoxyphenyl) phosphate, toluyl diphenyl phosphate, diphenyl octyl phosphate, trioctyl phosphate, triethyl phosphate, ethylene ethyl phosphate, tris (beta-chloroethyl) phosphate, tris (2, 3-pentafluoropropyl) phosphate, and the like tris (1, 3-fluoro-2-propyl) phosphate, phosphite flame retardants, trimethyl phosphite, triphenyl phosphite, triethyl phosphite, tributyl phosphite, tris (2, 2-trifluoroethyl) phosphite, phosphotriester, phosphonate flame retardants, dimethyl methylphosphonate, diethyl ethylphosphonate, diethyl phenylphosphonate, bis (2, 2-trifluoroethyl) methylphosphonate, bis (2, 2-trifluoroethyl) ethylphosphonate, diethyl 2- (thienylmethyl) phosphonate, hexamethoxycyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, unsaturated alkoxycyclotriphosphazene, hexa (2, 2-trifluoroethoxy) cyclotriphosphazene, ethoxypentafluoroethylcyclotriphosphazene, phenoxypentafluoroethylcyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, and the like, 4-methoxy-phenoxy pentafluoroethylene triphosphazene, 2-chloro-4-methoxy-phenoxy pentafluoroethylene triphosphazene, poly [ bis (methoxyethoxyethoxy) phosphazene ], poly [ bis (ethoxyethoxyethoxy) phosphazene ], small phosphazene molecules, hexafluoro-cyclotriphosphazene, ethoxy (pentafluoro) cyclotriphosphazene, hexachlorocyclotriphosphazene, or a combination of two or more thereof.
Further defined, the fire-fighting heat conducting medium is perfluorinated hexanone.
The fire extinguishing method based on the heat pipe with the gas generating device for the battery comprises the following steps of:
1) When the temperature of the fire-fighting heat conducting medium in the heat pipe body reaches a self-starting value, the temperature-sensitive initiator reacts and releases heat to provide a reaction temperature condition for the gas generating agent;
2) When the temperature reaches the reaction condition of the gas generating agent, the gas generating agent starts to react and generates a large amount of gas, the gas continuously gathers in the packaging shell, and when the gas pressure in the packaging shell reaches the limit value of the explosion of the packaging shell, the packaging shell is exploded;
3) The gas gathers in the lumen of heat pipe body, promotes the heat pipe body blasting to release the fire control heat conduction medium to the battery inside, puts out a fire to the battery inside.
Further defined, the step 3) specifically comprises: the gas gathers in the lumen of heat pipe body, and the atmospheric pressure that gas produced and fire control heat conduction medium evaporation produce gaseous atmospheric pressure combined action, impels the weak portion blasting of heat pipe body, releases fire control heat conduction medium to the battery inside, puts out a fire to the battery inside.
Further defined, the self-starting value of the temperature of the fire-fighting heat conducting medium in the step 1) is more than 150 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a heat pipe containing a gas generating device for a battery, which comprises a heat pipe body, wherein a heat conducting working medium in the heat pipe body is a fire-fighting heat conducting medium, and the gas generating device is arranged in an inner cavity of the heat pipe body. The evaporation section of the heat pipe body is arranged in the battery box body, the condensation section is arranged outside the battery box body, and when the battery works normally, heat generated when the battery works normally can be led out of the battery box body through the heat pipe body to dissipate heat of the battery; when the battery is out of control, the fire-fighting heat-conducting medium can not be led out in time to start heating because of heat, the gas generating device is triggered to start when the temperature of the fire-fighting heat-conducting medium is too high, a large amount of gas is generated, the gas generating device is exploded under the action of the gas pressure, the gas is released into the inner cavity of the heat pipe body, the gas pressure of the gas and the steam pressure generated by the fire-fighting heat-conducting medium in the inner cavity of the heat pipe body jointly act, the heat pipe body is promoted to be exploded, the fire-fighting heat-conducting medium is released into the cavity of the battery, and the interior of the battery is extinguished. The gas generating device has simple structure, and has no influence on the structure of the battery and the structure of the heat pipe, namely the original structure and the volume of the battery.
2. The gas generating device comprises a packaging shell, a temperature sensing initiator and a gas generating agent, wherein the packaging shell is arranged in a hollow structure of the heat pipe body, the temperature sensing initiator and the gas generating agent are both arranged in the packaging shell, and the temperature sensing initiator is used for triggering the gas generating agent to generate gas; the temperature of the fire-fighting heat conducting medium is sensed through the temperature-sensitive initiator, and when the temperature-sensitive initiator reaches a self-starting value, the reaction starts to generate heat, so that a temperature condition is provided for gas production of the gas producer. The whole process has simple reaction principle and good feasibility.
3. The temperature-sensitive initiator is attached to the inner wall of the packaging shell; the temperature sensing initiator is more sensitive to the temperature sensing of the fire-fighting heat conducting medium.
4. The packaging shell is arranged at the bottom of the hollow structure on the heat pipe body, so that the arrangement can not influence the steam flow and the condensed gas backflow in the inner cavity of the heat pipe body, and the normal heat conduction operation of the heat pipe body can not be hindered.
5. A concave clamping groove is formed in the pipe wall of the heat pipe body, and the concave clamping groove is contacted with the top of the packaging shell; the encapsulation shell is clamped and limited through the concave clamping groove, so that the encapsulation shell is prevented from floating in the hollow structure of the heat pipe body, and the circulation of the fire-fighting heat-conducting medium in the heat pipe body is prevented from being influenced.
6. The pipe wall of the heat pipe body is provided with a weak part, the pressure in the heat pipe body can reach a limit value conveniently through the weak part, and explosion is generated from the weak part to release the heat-conducting medium for heat insulation.
7. The packaging shell is compatible with the fire-fighting heat-conducting medium, namely, the packaging shell cannot react with the fire-fighting heat-conducting medium and cannot influence the fire-fighting heat-conducting medium.
Drawings
FIG. 1 is a schematic diagram of a structure in which a temperature sensitive initiator is arranged at the side part of a gas generating device;
FIG. 2 is a schematic view of a heat pipe with a gas generating device for a battery according to the present invention;
FIG. 3 is a schematic diagram of a structure in which a temperature sensitive initiator is arranged at the bottom of a gas generating device;
FIG. 4 is a schematic diagram of a heat pipe with a gas generating device for a battery according to the second embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the gas generating apparatus with temperature sensitive initiator on the top, bottom and side walls;
FIG. 6 is a schematic diagram of a heat pipe with a gas generating device for a battery according to the third embodiment of the present invention;
the heat pipe comprises a 1-heat pipe body, a 2-hollow structure, a 3-gas generating device, a 31-temperature-sensing initiator, a 32-gas generating agent, a 4-weak part, a 41-linear scribing groove, a 42-annular scribing groove and a 5-concave clamping groove.
Detailed Description
The technical scheme of the present invention will be further explained with reference to the drawings and examples, but the present invention is not limited to the embodiments described below.
The invention relates to a heat pipe containing a gas generating device for a battery, which comprises a heat pipe body 1, wherein a heat conducting working medium in the heat pipe body 1 is a fire-fighting heat conducting medium, and the gas generating device 3 is arranged in a hollow structure 2 of the heat pipe body 1. The gas generating device 3 comprises a packaging shell, a temperature sensitive initiator 31 and a gas generating agent 32, wherein the packaging shell is arranged in the hollow structure 2 of the heat pipe body 1, the temperature sensitive initiator 31 and the gas generating agent 32 are both arranged in the packaging shell, and the temperature sensitive initiator 31 is used for triggering the gas generating agent 32 to generate gas. The temperature sensitive initiator 31 is attached to the inner wall of the package. The temperature sensitive initiator 31 is attached to the top wall, bottom wall or side wall of the package housing. The packaging shell is arranged at the bottom of the hollow structure 2 on the heat pipe body 1. The pipe wall of the heat pipe body 1 is provided with a concave clamping groove which is contacted with the top of the packaging shell. The packaging shell is arranged below the liquid suction core of the heat pipe body 1. The wall of the heat pipe body 1 is provided with a weak part 4. The weaknesses 4 are weaknesses, linear score grooves or annular score grooves. The packaging shell is a metal shell or a plastic shell and is compatible with the fire-fighting heat conducting medium. The metal shell is a copper shell or an aluminum shell. The fire-fighting heat-conducting medium is perfluoro ketone, pentafluoroethane, difluoromethane, difluoro-chloromonobromomethane, trifluoro-monobromomethane, tetrafluorodibromoethane, heptafluoropropane, trifluoromethane, difluoro-bromomethane, monochloro-monobromomethane, difluoro-dibromomethane, ammonia water, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, fluoroalkyl phosphate, cresyl diphenyl phosphate, diphenyl-octyl triphenyl phosphate, tributyl phosphate, trimethyl phosphate, isopropylphenyl diphenyl phosphate, tris (4-methoxyphenyl) phosphate, toluenediphenyl phosphate, octyl diphenyl phosphate, trioctyl phosphate, triethyl phosphate, ethylene ethyl phosphate, tris (beta-chloroethyl) phosphate, tris (2, 3-pentafluoropropyl) phosphate tris (1, 3-fluoro-2-propyl) phosphate, phosphite flame retardants, trimethyl phosphite, triphenyl phosphite, triethyl phosphite, tributyl phosphite, tris (2, 2-trifluoroethyl) phosphite, phosphotriester, phosphonate flame retardants, dimethyl methylphosphonate, diethyl ethylphosphonate, diethyl phenylphosphonate, bis (2, 2-trifluoroethyl) methylphosphonate, bis (2, 2-trifluoroethyl) ethylphosphonate, diethyl 2- (thienylmethyl) phosphonate, hexamethoxycyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, unsaturated alkoxycyclotriphosphazene, hexa (2, 2-trifluoroethoxy) cyclotriphosphazene, ethoxypentafluoroethylcyclotriphosphazene, phenoxypentafluoroethylcyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, and the like, 4-methoxy-phenoxy pentafluoroethylene triphosphazene, 2-chloro-4-methoxy-phenoxy pentafluoroethylene triphosphazene, poly [ bis (methoxyethoxyethoxy) phosphazene ], poly [ bis (ethoxyethoxyethoxy) phosphazene ], small phosphazene molecules, hexafluoro-cyclotriphosphazene, ethoxy (pentafluoro) cyclotriphosphazene, hexachlorocyclotriphosphazene, or a combination of two or more thereof. The fire-fighting heat conducting medium is perfluoro hexanone.
Example 1
Referring to fig. 1-2, the heat pipe with a gas generating device for a battery in this embodiment includes a heat pipe body 1, a heat conducting medium in the heat pipe body 1 is a fire-fighting heat conducting medium, the gas generating device 3 is disposed in a hollow structure 2 of the heat pipe body 1, the hollow structure 2 of the heat pipe body 1 is a steam flow cavity, that is, steam vaporized by the fire-fighting heat conducting medium flows in the hollow structure 2 of the heat pipe body 1.
The gas generating device 3 of the embodiment comprises a packaging shell, a temperature sensing initiator 31 and a gas generating agent 32, wherein the packaging shell is in a hexagonal structure and is a metal shell, the metal shell is compatible with a fire-fighting heat conducting medium, and the compatibility means that no chemical reaction occurs between the metal shell and the fire-fighting heat conducting medium; the packaging shell is arranged in the hollow cavity of the heat pipe body 1, the temperature-sensitive initiator 31 and the gas generating agent 32 are packaged and sealed through the packaging shell, and the temperature-sensitive initiator 31 is used for triggering the gas generating agent 32 to generate gas.
Preferably, the temperature sensitive initiator 31 in this embodiment is attached to four sidewalls in the inner cavity of the package. The packaging shell is arranged at the bottom of the heat pipe body 1 and is positioned right below the heat absorption core on the heat pipe body 1.
The present embodiment is provided with a weak portion 4 on the pipe wall of the heat pipe body 1. Preferably, the weak portion 4 is a weak hole, and the wall thickness of the weak hole is one quarter to one third of the wall thickness of the tube wall of the heat tube body 1.
Preferably, the package housing of the present embodiment adopts a copper housing or an aluminum housing.
Preferably, the temperature sensitive initiator 31 in this embodiment is a thermosensitive wire agent.
Preferably, the gas generating agent 32 in this embodiment is a commercially available aerosol potassium salt agent, strontium salt agent, black powder, or the like.
Preferably, the fire-fighting heat conducting medium of the embodiment is perfluoro hexanone.
Preferably, the self-starting temperature of the temperature sensitive initiator 31 of the present embodiment is 160 ℃.
Example 2
Referring to fig. 3-4, the heat pipe with the gas generating device for the battery in this embodiment includes a heat pipe body 1, a heat conducting medium in the heat pipe body 1 is a fire-fighting heat conducting medium, the gas generating device 3 is disposed in a hollow structure 2 of the heat pipe body 1, the hollow structure 2 of the heat pipe body 1 is a steam flow cavity, that is, steam vaporized by the fire-fighting heat conducting medium flows in the hollow structure 2 of the heat pipe body 1.
The gas generating device 3 of the embodiment comprises a packaging shell, a temperature sensing initiator 31 and a gas generating agent 32, wherein the packaging shell is in a hexagonal structure and is a plastic shell, the plastic shell is compatible with a fire-fighting heat conducting medium, and the compatibility means that no chemical reaction occurs between the metal shell and the fire-fighting heat conducting medium; the packaging shell is arranged in the hollow cavity of the heat pipe body 1, the temperature-sensitive initiator 31 and the gas generating agent 32 are packaged and sealed through the packaging shell, and the temperature-sensitive initiator 31 is used for triggering the gas generating agent 32 to generate gas.
Preferably, the temperature sensitive initiator 31 in this embodiment is attached to four sidewalls in the inner cavity of the package. The packaging shell is arranged at the bottom of the heat pipe body 1 and is positioned below the heat absorption core on the heat pipe body 1.
The present embodiment is provided with a weak portion 4 on the pipe wall of the heat pipe body 1. Preferably, the weak portion 4 is a linear scribing groove 41 arranged along the axial direction of the heat pipe body 1, and the thickness of the bottom wall of the linear scribing groove 41 is one fifth of the wall thickness of the pipe wall of the heat pipe body 1.
Preferably, the temperature sensitive initiator 31 in this embodiment is a thermosensitive wire agent.
Preferably, the gas generating agent 32 in this embodiment is a commercially available aerosol potassium salt agent, strontium salt agent, black powder, or the like.
Preferably, the fire-fighting heat-conducting medium of this embodiment is a mixture of trifluoro-bromomethane, triethyl phosphate and hexachlorocyclotriphosphazene in any ratio.
Preferably, the self-starting temperature of the temperature sensitive initiator 31 of the present embodiment is 170 ℃.
Preferably, a concave clamping groove 5 is arranged on the pipe wall of the heat pipe body 1 in the embodiment, and the bottom of the concave clamping groove 5 is contacted with the top of the packaging shell. The encapsulation shell is limited by the concave clamping groove 5.
Example 3
Referring to fig. 5-6, the heat pipe with a gas generating device for a battery in this embodiment includes a heat pipe body 1, a heat conducting medium in the heat pipe body 1 is a fire-fighting heat conducting medium, the gas generating device 3 is disposed in a hollow structure 2 of the heat pipe body 1, the hollow structure 2 of the heat pipe body 1 is a steam flow cavity, that is, steam vaporized by the fire-fighting heat conducting medium flows in the hollow structure 2 of the heat pipe body 1.
The gas generating device 3 of the embodiment comprises a packaging shell, a temperature sensing initiator 31 and a gas generating agent 32, wherein the packaging shell is in a hexagonal structure and is a copper shell, the copper shell is compatible with a fire-fighting heat conducting medium, and the compatibility means that no chemical reaction occurs between the metal shell and the fire-fighting heat conducting medium; the packaging shell is arranged in the hollow cavity of the heat pipe body 1, the temperature-sensitive initiator 31 and the gas generating agent 32 are packaged and sealed through the packaging shell, and the temperature-sensitive initiator 31 is used for triggering the gas generating agent 32 to generate gas.
Preferably, the temperature sensitive initiator 31 in this embodiment is attached to the top wall, the bottom wall and the side wall of the inner side in the inner cavity of the package housing. The packaging shell is arranged at the bottom of the heat pipe body 1 and is positioned below the heat absorption core on the heat pipe body 1.
The present embodiment is provided with a weak portion 4 on the pipe wall of the heat pipe body 1. Preferably, the weak portion 4 is an annular scribing groove 42 arranged along the circumferential direction of the heat pipe body 1, and the thickness of the bottom wall of the annular scribing groove 42 is one quarter of the wall thickness of the pipe wall of the heat pipe body 1.
Preferably, the temperature sensitive initiator 31 in this embodiment is a thermosensitive wire agent.
Preferably, the gas generating agent 32 in this embodiment is a commercially available aerosol potassium salt agent, strontium salt agent, black powder, or the like.
Preferably, the fire-fighting heat-conducting medium of this embodiment is a mixture of pentafluoroethane, dibromomethane, trioctyl phosphate and ethoxypentafluoroethyl cyclotriphosphazene in any ratio.
Preferably, the self-starting temperature of the temperature sensitive initiator 31 of the present embodiment is 180 ℃.
Preferably, a concave clamping groove 5 is arranged on the pipe wall of the heat pipe body 1 of the embodiment, and the bottom of the concave clamping groove 5 is contacted with the top of the packaging shell; the concave clamping groove 5 is an annular clamping groove arranged along the circumferential direction of the heat pipe body 1. The encapsulation shell is limited by the concave clamping groove 5.
Example 4
The fire extinguishing method of the heat pipe containing the gas generating device for the battery of the present embodiment is based on the heat pipe containing the gas generating device for the battery of any one of the above embodiments 1 to 3, and specifically comprises the following steps:
1) When the temperature of the fire-fighting heat conducting medium in the heat pipe body 1 reaches a self-starting value, the temperature-sensitive initiator 31 reacts and releases heat to provide a reaction temperature condition for the gas generating agent 32;
2) When the temperature reaches the reaction condition of the gas generating agent 32, the gas generating agent starts to react and generates a large amount of gas, the gas continuously gathers in the packaging shell, and when the gas pressure in the packaging shell reaches the limit value of the explosion of the packaging shell, the packaging shell is exploded;
3) The gas gathers in the lumen 2 of the heat pipe body 1, promotes the heat pipe body 1 to explode and releases the fire-fighting heat conduction medium to the inside of the battery, and extinguishes the fire in the battery.
Preferably, step 3) of this embodiment specifically includes that gas gathers in the lumen 2 of the heat pipe body 1, and the air pressure generated by the gas and the air pressure generated by the evaporation of the fire-fighting heat-conducting medium act together to cause the weak portion 4 of the heat pipe body 1 to burst, so that the fire-fighting heat-conducting medium is released into the battery, and the fire is extinguished in the battery.
Preferably, the self-starting value of the temperature of the fire-fighting heat conducting medium in step 1) of the embodiment is greater than 150 ℃.
It should be noted that the number of the substrates, the fire-fighting heat-conducting medium of the invention can be perfluoro ketone, pentafluoroethane, difluoromethane, difluoro-chloromonobromomethane, trifluoro-monobromomethane, tetrafluorodibromoethane, heptafluoropropane, trifluoro-methane, difluoro-bromomethane, monochloromonobromomethane, difluoro-dibromomethane, ammonia water, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, fluoroalkyl phosphate, cresyl diphenyl phosphate, diphenyl-octyl triphenyl phosphate, tributyl phosphate, trimethyl phosphate, isopropylphenyl diphenyl phosphate, tris (4-methoxyphenyl) phosphate, toluene diphenyl phosphate, diphenyl octyl phosphate, trioctyl phosphate, triethyl phosphate, ethylene ethyl phosphate, tris (beta-chloroethyl) phosphate tris (2, 3-pentafluoropropyl) phosphate, tris (1, 3-fluoro-2-propyl) phosphate, phosphite flame retardants, trimethyl phosphite, triphenyl phosphite, triethyl phosphite, tributyl phosphite, tris (2, 2-trifluoroethyl) phosphite, phosphotriester, phosphonate flame retardants, dimethyl methylphosphonate, diethyl ethylphosphonate, diethyl methylphosphonate diethyl phenylphosphonate, bis (2, 2-trifluoroethyl) methylphosphonate, bis (2, 2-trifluoroethyl) ethylphosphonate, diethyl 2- (thienylmethyl) phosphonate, hexamethoxy cyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, unsaturated alkoxy cyclotriphosphazene, hexa (2, 2-trifluoroethoxy) cyclotriphosphazene, ethoxypentafluoroethyl cyclotriphosphazene, one or two or more of phenoxy pentafluoroethylene triphosphazene, 4-methoxy-phenoxy pentafluoroethylene triphosphazene, 2-chloro-4-methoxy-phenoxy pentafluoroethylene triphosphazene, poly [ bis (methoxyethoxyethoxy) phosphazene ], poly [ bis (ethoxyethoxyethoxy) phosphazene ], phosphazene small molecule, hexafluoro-cyclotriphosphazene, ethoxy (pentafluoro) cyclotriphosphazene, hexachlorocyclotriphosphazene. The heat pipe with the gas generating device for the battery is characterized in that the gas generating device 3 is firstly arranged in the hollow structure 2 of the heat pipe body 1 to seal one end part of the heat pipe body 1, the hollow structure 2 of the heat pipe body 1 is pumped to a vacuum state through the other end part of the heat pipe body 1, then the other end part of the heat pipe body 1 is filled with fire-fighting heat conducting medium into the hollow structure 2 of the heat pipe body 1, and finally the end part is sealed.
The foregoing is a further elaboration of the present invention in connection with the preferred embodiments, and is not intended to limit the invention, but it will be apparent to those skilled in the art that various simple additions or substitutions can be made without departing from the spirit and principles of the invention, and any modifications, equivalents, improvements and modifications can be made without departing from the scope of the invention as defined in the appended claims.
Claims (14)
1. The heat pipe is characterized by comprising a heat pipe body, wherein a heat conduction working medium in the heat pipe body is a fire-fighting heat conduction medium, and the air generating device is arranged in a hollow structure of the heat pipe body; the gas generating device comprises a packaging shell, a temperature sensing initiator and a gas generating agent, wherein the packaging shell is arranged in a hollow structure of the heat pipe body, the temperature sensing initiator and the gas generating agent are both arranged in the packaging shell, and the temperature sensing initiator is used for triggering the gas generating agent to generate gas;
the pipe wall of the heat pipe body is provided with a weak part;
the gas generating agent starts to react and generates a large amount of gas, the gas is continuously accumulated in the packaging shell, and when the gas pressure in the packaging shell reaches the limit value of the explosion of the packaging shell, the packaging shell is exploded.
2. The heat pipe with gas generating device for battery of claim 1, wherein the temperature sensitive initiator is attached to the inner wall of the package.
3. The heat pipe with gas generating device for battery of claim 2, wherein the temperature sensitive initiator is attached to the top wall, bottom wall or side wall of the package.
4. A heat pipe containing a gas generating apparatus for a battery according to any one of claims 1 to 3, wherein the package housing is disposed at the bottom of the hollow structure on the heat pipe body.
5. The heat pipe with gas generating device for battery according to claim 4, wherein a concave clamping groove is arranged on the pipe wall of the heat pipe body, and the concave clamping groove is contacted with the top of the packaging shell.
6. The heat pipe with gas generating means for a battery of claim 5, wherein the package housing is disposed below the wick of the heat pipe body.
7. The heat pipe for a battery including a gas generating apparatus according to claim 6, wherein the weak portion is a weak hole, a linear score groove, or an annular score groove.
8. The heat pipe containing a gas generating apparatus for a battery according to claim 7, wherein the package case is a metal case or a plastic case, and the package case is compatible with a fire-fighting heat conductive medium.
9. The heat pipe containing a gas generating apparatus for a battery according to claim 8, wherein the metal case is a copper case or an aluminum case.
10. A heat pipe for a battery comprising a gas generating device according to claim 9, the fire-fighting heat-conducting medium is perfluoro ketone, pentafluoroethane, difluoromethane, difluoro-chloromonobromomethane, trifluoro-monobromomethane, tetrafluorodibromoethane, heptafluoropropane, trifluoromethane, difluoro-bromomethane, monochloromonobromomethane, difluoro-dibromomethane, ammonia water, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, fluoroalkyl phosphate, cresyl diphenyl phosphate, diphenyl-octyl triphenyl phosphate, tributyl phosphate, isopropylphenyl diphenyl phosphate, tris (4-methoxyphenyl) phosphate, toluene diphenyl phosphate, diphenyl octyl phosphate, trioctyl phosphate, ethylene ethyl phosphate, tri (beta-chloroethyl) phosphate, tri (2, 3-pentafluoropropyl) phosphate tris (1, 3-fluoro-2-propyl) phosphate, phosphite flame retardants, trimethyl phosphite, triphenyl phosphite, triethyl phosphite, tributyl phosphite, tris (2, 2-trifluoroethyl) phosphite, phosphotriester, phosphonate flame retardants, dimethyl methylphosphonate, diethyl ethylphosphonate, diethyl phenylphosphonate, bis (2, 2-trifluoroethyl) methylphosphonate, bis (2, 2-trifluoroethyl) ethylphosphonate, diethyl 2- (thienylmethyl) phosphonate, hexamethoxycyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, unsaturated alkoxycyclotriphosphazene, hexa (2, 2-trifluoroethoxy) cyclotriphosphazene, ethoxypentafluoroethyl cyclotriphosphazene, one or two or more of phenoxy pentafluoroethylene triphosphazene, 4-methoxy-phenoxy pentafluoroethylene triphosphazene, 2-chloro-4-methoxy-phenoxy pentafluoroethylene triphosphazene, poly [ bis (methoxyethoxyethoxy) phosphazene ], poly [ bis (ethoxyethoxyethoxy) phosphazene ], phosphazene small molecule, hexafluoro-cyclotriphosphazene, ethoxy (pentafluoro) cyclotriphosphazene, hexachlorocyclotriphosphazene.
11. The heat pipe with gas generating device for battery of claim 10, wherein the fire-fighting heat conducting medium is perfluoro hexanone.
12. A method of extinguishing a fire based on a heat pipe containing a gas generating apparatus for a battery according to claim 11, comprising the steps of:
1) When the temperature of the fire-fighting heat conducting medium in the heat pipe body reaches a self-starting value, the temperature-sensitive initiator reacts and releases heat to provide a reaction temperature condition for the gas generating agent;
2) When the temperature reaches the reaction condition of the gas generating agent, the gas generating agent starts to react and generates a large amount of gas, the gas continuously gathers in the packaging shell, and when the gas pressure in the packaging shell reaches the limit value of the explosion of the packaging shell, the packaging shell is exploded;
3) The gas gathers in the lumen of heat pipe body, promotes the heat pipe body blasting to release the fire control heat conduction medium to the battery inside, puts out a fire to the battery inside.
13. The fire extinguishing method according to claim 12, wherein the step 3) is specifically: the gas gathers in the lumen of heat pipe body, and the atmospheric pressure that gas produced and fire control heat conduction medium evaporation produce gaseous atmospheric pressure combined action, impels the weak portion blasting of heat pipe body, releases fire control heat conduction medium to the battery inside, puts out a fire to the battery inside.
14. The fire extinguishing method of claim 13, wherein the self-initiation value of the temperature of the fire-fighting heat-conducting medium in step 1) is greater than 150 ℃.
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| CN202111158674.0A CN113908470B (en) | 2021-09-30 | 2021-09-30 | Heat pipe containing gas generating device for battery and fire extinguishing method thereof |
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| CN202111158674.0A CN113908470B (en) | 2021-09-30 | 2021-09-30 | Heat pipe containing gas generating device for battery and fire extinguishing method thereof |
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| CN113908470B true CN113908470B (en) | 2023-08-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102247683B (en) * | 2011-04-26 | 2013-01-23 | 国安达消防科技(厦门)有限公司 | Electroless self-starting fire-extinguishing device |
| US9995535B2 (en) * | 2015-06-30 | 2018-06-12 | Faraday&Future Inc. | Heat pipe for vehicle energy-storage systems |
| CN207706123U (en) * | 2017-11-21 | 2018-08-07 | 段晓杰 | A kind of photovoltaic lightningproof direct current conflux case |
| CN111509163A (en) * | 2020-05-25 | 2020-08-07 | 重庆金康动力新能源有限公司 | Battery pack with fire extinguishing function |
| CN111617407A (en) * | 2020-05-28 | 2020-09-04 | 湖北及安盾消防科技有限公司 | Energy storage device |
| CN212789533U (en) * | 2020-06-29 | 2021-03-26 | 桑赐锋 | Hot aerosol automatic fire extinguishing device |
| CN111905304A (en) * | 2020-07-23 | 2020-11-10 | 浙江南都电源动力股份有限公司 | Battery heat-packing tube device with fire extinguishing and heat conducting functions |
| CN216536633U (en) * | 2021-09-30 | 2022-05-17 | 陕西奥林波斯电力能源有限责任公司 | Heat pipe containing gas production device for battery |
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