CN216432631U - Self-venting explosion heat pipe for battery - Google Patents
Self-venting explosion heat pipe for battery Download PDFInfo
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- CN216432631U CN216432631U CN202121884056.XU CN202121884056U CN216432631U CN 216432631 U CN216432631 U CN 216432631U CN 202121884056 U CN202121884056 U CN 202121884056U CN 216432631 U CN216432631 U CN 216432631U
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Abstract
The application discloses a self-explosion venting heat pipe for a battery, which comprises a heat pipe body with a hollow structure, and is characterized in that a fire-fighting heat-conducting medium is stored in the hollow structure of the heat pipe body; the self-explosion device is arranged in the heat pipe body; when the temperature of the heat pipe reaches a threshold value, the self-explosion device in the heat pipe body is started, the generated pressure enables the weak part of the heat pipe body to be exploded, and the fire-fighting heat-conducting medium is released, so that fire in the battery or the battery box is prevented or extinguished.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a self-venting explosion heat pipe for a battery.
Background
In recent years, lithium battery technology has been rapidly developed and has been used in more and more fields. However, due to the principle and structural characteristics of the lithium battery, the heat generated by internal resistance is often increased during repeated use. If the accumulated heat cannot be effectively dissipated, the stability of the battery in use is affected, and the service life of the lithium battery is shortened. When the temperature is further raised, the electrolyte and the solvent inside can be decomposed, combusted and exploded.
In the current market, aiming at the fire after the thermal runaway of the battery, the main treatment method is the traditional fire extinguishing agent for extinguishing the fire, but the method can only extinguish the fire source outside the battery and cannot extinguish the fire from the internal source of the battery, and the secondary reburning of the battery can be caused when the thermal runaway inside the battery continues.
A heat pipe is a superconductor, generally composed of a body, an internal wick, and a heat conducting working medium, whose heat conducting capacity exceeds that of any known metal. The working principle is that when one end of the heat pipe is heated, the heat conducting working medium is evaporated and vaporized, the steam flows to the other end under a small pressure difference to release heat and condense into liquid, and the liquid flows back to the evaporation section along the porous material under the action of gravity or capillary force. The heat is transferred from one end of the heat pipe to the other end by the circulation, so that the purpose of heat conduction is achieved. The heat pipe in the current market only has a heat conduction function, and a heat pipe with a fire-fighting function is not available.
Patent CN111912268A discloses a heat pipe with heat conduction and fire control function, and the heat pipe bottom is connected with the container, stores heat conduction fire control medium in this container, sets up the release nest of tubes on the container, is provided with the valve on the release nest of tubes. By adopting the structure, heat can be conducted at normal temperature, and when the battery pack is heated due to failure, the medium in the container can be sprayed into the battery pack, so that the purposes of cooling and extinguishing fire are achieved.
Patent CN212914289U discloses a battery-wrapped heat pipe device with fire extinguishing and heat conducting functions, which includes a heat pipe body with a hollow structure and a container at the lower part of the heat pipe body, wherein a sealing cover is arranged at the top end of the heat pipe body, a liquid absorption core is arranged on the inner wall of the heat pipe body, and the liquid absorption core encloses a hollow space; the medium is stored in the container, and the inner cavity of the container is communicated with the hollow space in the heat pipe body; the heat pipe is also provided with a release pipe group, the release pipe group is provided with a valve, the release pipe group is communicated with the heat pipe body or the container, when the air pressure in the container reaches a preset value, the valve is opened, and the medium is sprayed out through the release pipe group.
In the above patent, a fire-fighting medium is filled in the container, and when the temperature and the pressure reach a certain threshold value, the release pipe group releases a fire-fighting substance to achieve a fire-fighting function. However, the above two solutions are both provided with a medium storage container separately, and the structure is complicated and not suitable for practical use.
Disclosure of Invention
In order to solve the technical problem, the technical scheme adopted by the application is as follows:
the application provides a self-explosion-venting heat pipe for a battery, which comprises a heat pipe body with a hollow structure, and is characterized in that a fire-fighting heat-conducting medium is stored in the hollow structure of the heat pipe body;
the self-explosion device is arranged in the heat pipe body;
when the temperature of the heat pipe reaches a threshold value, the self-explosion device in the heat pipe body is started, the generated pressure enables the weak part of the heat pipe body to be exploded, and the fire-fighting heat-conducting medium is released.
Furthermore, the self-explosion device is stored with a temperature-sensing self-ignition medicament which can be started within a specific temperature threshold value.
Further, the temperature-sensing autoignition medicament has a self-starting temperature threshold range of 150-200 ℃.
Furthermore, the self-explosion device also contains a gas production medicament. The temperature-sensing spontaneous combustion agent is started at a certain temperature threshold value, the gas-generating agent is further ignited, a large amount of gas is generated, the air pressure in the heat pipe is rapidly increased, the weak part of the heat pipe body is burst, and the fire-fighting heat-conducting medium is released.
Further, the medicament in the self-explosion device is hermetically stored in a metal shell which is compatible with the fire-fighting heat-conducting medium.
It is understood that the housing of the self-explosion device can also be a non-metallic housing compatible with the fire fighting heat transfer medium.
Further preferably, the metal shell is a copper shell or an aluminum shell.
Further, the fire-fighting heat-conducting medium is perfluoroketone, pentafluoroethane, difluoromethane, difluoromonochloromethane, trifluorobromomethane, tetrafluorodibromoethane, heptafluoropropane, trifluoromethane, difluorobromomethane, monochlorobromomethane, difluorodibromomethane, trimethyl phosphate, triethyl phosphate, triphenyl phosphate, fluoroalkyl phosphate, cresyldiphenyl phosphate, triphenyl diphenyl-octylphosphate, tributyl phosphate, trimethyl phosphate, isopropylphenyl diphenyl phosphate, tris (4-methoxyphenyl) phosphate, cresyldiphenyl phosphate, octyl diphenyl phosphate, trioctyl phosphate, triethyl phosphate, ethylene ethyl phosphate, tris (β -chloroethyl) phosphate, tris (2,2,3, 3-pentafluoropropyl) phosphate, tris (1,1,1,3,3, 3-fluoro-2-propyl) phosphate, Phosphite flame retardants, trimethyl phosphite, triphenyl phosphite, triethyl phosphite, tributyl phosphite, tris (2,2, 2-trifluoroethyl) phosphite, triesters of phosphorous acid, phosphonate flame retardants, dimethyl methylphosphonate, diethyl ethylphosphonate, diethyl phenylphosphonate, bis (2,2, 2-trifluoroethyl) methylphosphonate, bis (2,2, 2-trifluoroethyl) ethylphosphonate, diethyl 2- (thienylmethyl) phosphonate, hexamethoxycyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, unsaturated alkoxycyclotriphosphazene, hexa (2,2, 2-trifluoroethoxy) cyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, phenoxypentafluorocyclotriphosphazene, 4-methoxy-phenoxypentafluorocyclotriphosphazene, 2-chloro-4-methoxy-phenoxypentafluorocyclotriphosphazene, tris (2,2,2, 2-trifluoroethyl) phosphonitrile, tris (2,2,2, 2-trifluoroethyl) ethylphosphonite, tris (2,2, 2-trifluoroethyl) phosphonate, 2-ethyl) ethylphosphonite, bis (2, 2-trifluoroethyl) ethylphosphonite, bis (2-ethoxycyclopentafluorotriphosphonite), tris (2-ethoxycyclopentafluorocyclotriphosphazene) phosphonitrile, 2-ethoxycyclotriphosphazene, 2-trifluoroethyl) phosphonite, 2-ethyl-phosphonate, 2-ethyl-phosphonate, phosphonitrile-ethyl, Poly [ bis (methoxyethoxyethoxy) phosphazene ], poly [ bis (ethoxyethoxyethoxyethoxy) phosphazene ], phosphazene small molecule, hexafluorocyclotriphosphazene, ethoxy (pentafluoro) cyclotriphosphazene, hexachlorocyclotriphosphazene or a combination thereof.
Further preferably, the fire-fighting heat-conducting medium is perfluoroketone, and more preferably, the fire-fighting heat-conducting medium is perfluorohexanone.
Furthermore, the heat pipe body is also provided with a weak part. Further, the weak part is a scribing groove arranged on the heat pipe body.
Further, the self-explosion device is arranged at the bottom of the heat pipe body.
Further, a stabilizing component is arranged outside the self-explosion device. Preferably, the stabilizing component is a rubber body or a clamp spring which is elastically attached to the heat pipe body. Further preferably, the stabilizing component may be a recessed detent provided on the heat pipe body.
Further preferably, a wick is also provided within the heat pipe.
Further preferably, the wick is a copper foam sintered wick.
Further, the heat pipe is vacuumized, and the fire-fighting heat-conducting medium is injected in a vacuum state.
Compared with the prior art, the method has the following beneficial effects:
1) by utilizing the heat pipe heat conduction principle, a heat conduction working medium with fire extinguishing capability is added into the heat pipe cavity, and when the temperature does not exceed a threshold value, the heat conduction working medium can balance the temperature inside the battery or the battery box; or the heat is transferred to a cooling device connected with the heat pipe body, so that the heat management of the heat battery is realized.
2) When the temperature in the battery or the battery box is too high, the temperature in the heat pipe is increased, when the temperature of the heat pipe reaches a threshold value, the self-explosion device in the heat pipe body is started, the generated pressure enables the weak part of the corresponding position of the heat pipe body to be exploded, and the heat-conducting working medium with the fire extinguishing capability is released, so that the fire in the battery or the battery box is prevented or extinguished.
Additional advantages, objects, and features of the application will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an external view of a heat pipe according to the present application.
Fig. 2 is a schematic cross-sectional view of a heat pipe according to embodiment 1 of the present application.
Fig. 3 is a schematic view of the combination of the circlip and the blasting device in embodiment 2 of the present application.
Fig. 4 is a schematic cross-sectional view of a heat pipe according to embodiment 2 of the present application.
Fig. 5 is a schematic cross-sectional view of a heat pipe according to embodiment 4 of the present application.
Detailed Description
The present application will now be described in further detail with reference to the accompanying drawings, whereby one skilled in the art can, with reference to the description, make an implementation.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The technical solution of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
The self-explosion-venting heat pipe for the battery comprises a heat pipe body 1 with a hollow structure, wherein a fire-fighting heat-conducting medium is stored in the hollow structure of the heat pipe body 1; the self-explosion device 3 is arranged in the heat pipe body; when the temperature of the heat pipe reaches a threshold value, the self-explosion device 3 in the heat pipe body 1 is started, the generated pressure enables the weak part of the heat pipe body 1 to be exploded, and the fire-fighting heat-conducting medium is released, so that fire in the battery or the battery box is prevented or extinguished.
Example 2
As shown in fig. 1 and 2, a self-explosion device 3 with a rubber body 4 is plugged into the bottom of the heat pipe body 1, and the self-explosion device 3 is fixed with the heat pipe body through the rubber body 4. Wherein, the self-explosion device 3 contains a temperature-sensing self-ignition medicament which can be started at 160 ℃. And vacuumizing the heat pipe body 1, injecting perfluorohexanone, and sealing to obtain the self-explosion venting heat pipe.
When the temperature in the heat pipe reaches the starting temperature of the temperature-sensing spontaneous combustion agent, the self-explosion device 3 is started to rapidly raise the pressure in the heat pipe, so that the notches 2 on the heat pipe body 1 are exploded to form a release channel, and the fire-fighting heat-conducting medium in the heat pipe body is sprayed out from the release channel, so that the purpose of preventing or extinguishing fire inside the battery or the battery box is achieved.
Example 3
As shown in fig. 3 and 4, the self-explosion device 3 with the snap spring 5 is plugged into the bottom of the heat pipe body 1, the snap spring 5 is clamped and fixed in the heat pipe to the self-explosion device 3, the self-explosion device 3 contains a temperature-sensitive self-ignition medicament and a gas-generating medicament, and the ignition temperature of the temperature-sensitive self-ignition medicament is 150 ℃. And vacuumizing the heat pipe body 1, injecting trifluoromethane, and sealing to obtain the self-venting heat pipe.
When the temperature in the heat pipe reaches the starting temperature of the temperature-sensing spontaneous combustion agent, the self-explosion device 3 is started, the gas-generating agent is further ignited, a large amount of gas is generated, the pressure in the heat pipe is rapidly increased, the weak part of the heat pipe body is exploded, a release channel is formed, the fire-fighting heat-conducting medium in the heat pipe body is sprayed out from the release channel, and the purpose of preventing or extinguishing fire inside the battery or the battery box is achieved.
Example 4
As shown in fig. 5, the self-explosion device 3 is plugged into the bottom of the heat pipe body 1, and then the corresponding position on the heat pipe body is provided with a concave clip 6, so that the self-explosion device 3 is fixed at the bottom of the heat pipe body 1. The self-explosion device 3 contains a temperature-sensitive self-ignition medicament and a gas-generating medicament, and the ignition temperature of the temperature-sensitive self-ignition medicament is 170 ℃. And vacuumizing the heat pipe body 1, injecting trimethyl phosphate, and sealing to obtain the self-venting heat pipe.
It can be understood that the sunken clamping position can be formed by directly processing or stamping the heat pipe body, so that the heat pipe body is sunken, and the self-explosion device 3 is clamped and fixed at a corresponding position through the sunken part.
When the temperature in the heat pipe reaches the starting temperature of the temperature-sensing spontaneous combustion agent, the self-explosion device 3 is started, the gas-generating agent is further ignited, a large amount of gas is generated, the pressure in the heat pipe is rapidly increased, the weak part of the heat pipe body is exploded, a release channel is formed, the fire-fighting heat-conducting medium in the heat pipe body is sprayed out from the release channel, and the purpose of preventing or extinguishing fire inside the battery or the battery box is achieved.
Although the embodiments of the present application have been disclosed above, they are not limited to the applications listed in the description and the embodiments. It can be applied in all kinds of fields suitable for the present application. Additional modifications will readily occur to those skilled in the art. Therefore, the application is not limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (17)
1. A self-explosion-venting heat pipe for a battery comprises a heat pipe body with a hollow structure, and is characterized in that a fire-fighting heat-conducting medium is stored in the hollow structure of the heat pipe body;
the self-explosion device is arranged in the heat pipe body;
when the temperature of the heat pipe reaches a threshold value, the self-explosion device in the heat pipe body is started, the generated pressure enables the weak part of the heat pipe body to be exploded, and the fire-fighting heat-conducting medium is released.
2. The self-venting heat pipe for a battery as claimed in claim 1, wherein the self-explosion device stores therein a temperature-sensitive autoignition agent that can be activated within a specific temperature threshold.
3. The self-venting heat pipe for a battery as claimed in claim 2, wherein the temperature-sensitive autoignition agent has a self-starting temperature threshold in a range of 150 ℃ to 200 ℃.
4. A self-venting heat pipe for a battery as claimed in claim 2 or 3, wherein the self-venting device further contains a gas generating agent.
5. The self-venting heat pipe for a battery as claimed in claim 1, wherein the chemical agent in the self-explosion device is hermetically stored in a metal housing, and the metal housing is compatible with the fire-fighting heat-conducting medium.
6. The self-venting heat pipe for a battery as claimed in claim 5, wherein the metal case is a copper case or an aluminum case.
7. A self-venting heat pipe for a battery as defined in claim 1, wherein the heat pipe body is further provided with a weakened portion.
8. A self-venting heat pipe for a battery as defined in claim 7, wherein said weakened portion is a scored groove provided on said heat pipe body.
9. The self-venting heat pipe for a battery as claimed in claim 1, wherein the self-explosion means is provided at the bottom of the heat pipe body.
10. The self-venting heat pipe for a battery as claimed in claim 1, wherein a stabilizing member is provided in addition to the self-explosion device.
11. The self-venting heat pipe for a battery as claimed in claim 10, wherein the stabilizing member is a rubber body or a snap spring elastically clinging to the heat pipe body.
12. The self-venting heat pipe for a battery as claimed in claim 10, wherein the stabilizing member is a recessed detent provided at a corresponding position of the heat pipe body.
13. The self-venting heat pipe for a battery as claimed in claim 1, wherein said heat pipe further comprises a wick.
14. The self-venting heat pipe for a battery of claim 13, wherein said wick is a copper foam sintered wick.
15. The self-venting heat pipe for a battery as claimed in claim 1, wherein the heat pipe is filled with the fire-fighting heat transfer medium under vacuum.
16. The self-venting heat pipe for a battery as claimed in claim 15, wherein the fire-fighting heat-conducting medium is perfluoroketone, pentafluoroethane, difluoromethane, difluoromonochloromonobromomethane, trifluoromonobromomethane, tetrafluorodibromoethane, heptafluoropropane, trifluoromethane, difluorobromomethane, monochloromonobromomethane, difluorodibromomethane, 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, cresyl diphenyl phosphate, diphenyl phosphate, trioctyl phosphate, triethyl phosphate, ethylene ethyl phosphate, tris (β -chloroethyl) phosphate, tris (2,2,3,3, 3-pentafluoropropyl) phosphate, tris (2,2,3, 3-pentafluoropropyl) phosphate, Tris (1,1,1,3,3, 3-fluoro-2-propyl) phosphate, phosphite flame retardants, trimethyl phosphite, triphenyl phosphite, triethyl phosphite, tributyl phosphite, tris (2,2, 2-trifluoroethyl) phosphite, triesters of phosphorous acid, phosphonate flame retardants, dimethyl methylphosphonate, diethyl ethylphosphonate, diethyl phenylphosphonate, bis (2,2, 2-trifluoroethyl) methylphosphonate, bis (2,2, 2-trifluoroethyl) ethylphosphonate, diethyl 2- (thienylmethyl) phosphonate, hexamethoxycyclotriphosphazene, hexa (methoxyethoxyethoxy) cyclotriphosphazene, unsaturated alkoxycyclotriphosphazene, hexa (2,2, 2-trifluoroethoxy) cyclotriphosphazene, ethoxypentafluorocyclotriphosphazene, phenoxypentafluorocyclotriphosphazene, phenoxycyclopentacyclotriphosphazene, phosphonitrile, phosphorus oxide, and zinc oxide, 4-methoxy-phenoxy pentafluorocyclotriphosphazene, 2-chloro-4-methoxy-phenoxy pentafluorocyclotriphosphazene, poly [ bis (methoxyethoxyethoxy) phosphazene ], poly [ bis (ethoxyethoxyethoxyethoxy) phosphazene ], phosphazene small molecule, hexachlorocyclotriphosphazene, ethoxy (pentafluoro) cyclotriphosphazene, hexachlorocyclotriphosphazene.
17. The self-venting heat pipe for a battery as claimed in claim 16, wherein the fire-fighting heat transfer medium is perfluorohexanone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121884056.XU CN216432631U (en) | 2021-08-12 | 2021-08-12 | Self-venting explosion heat pipe for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121884056.XU CN216432631U (en) | 2021-08-12 | 2021-08-12 | Self-venting explosion heat pipe for battery |
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| Publication Number | Publication Date |
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| CN216432631U true CN216432631U (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121884056.XU Active CN216432631U (en) | 2021-08-12 | 2021-08-12 | Self-venting explosion heat pipe for battery |
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| CN (1) | CN216432631U (en) |
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2021
- 2021-08-12 CN CN202121884056.XU patent/CN216432631U/en active Active
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