CN115282544A - Lithium battery fire extinguishing agent and lithium battery prepared by using same - Google Patents
Lithium battery fire extinguishing agent and lithium battery prepared by using same Download PDFInfo
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- CN115282544A CN115282544A CN202211024782.3A CN202211024782A CN115282544A CN 115282544 A CN115282544 A CN 115282544A CN 202211024782 A CN202211024782 A CN 202211024782A CN 115282544 A CN115282544 A CN 115282544A
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- lithium battery
- fire extinguishing
- perfluorinated
- alkane
- ketone
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0028—Liquid extinguishing substances
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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
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
- A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas
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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 application relates to the technical field of lithium battery fire extinguishing agents, in particular to a lithium battery fire extinguishing agent and a lithium battery prepared by using the same. A lithium battery fire extinguishing agent mainly comprises perfluorinated C5-C8 ketone substances, and a perfluorinated C5-C10 alkane and alkene mixture; the perfluor C5-C8 ketone substance is at least one of perfluor C5-C8 ketone or at least one of fluoride corresponding to the perfluor C5-C8 ketone or at least one of corresponding isomers of the perfluor C5-C8 ketone; the mixture of perfluoro C5-C10 alkane and olefin is prepared by mixing perfluoro C5-C10 alkane and perfluoro C5-C10 alkene in any ratio. When a lithium battery accident occurs, in the temperature rising process of the lithium battery, the front-segment perfluorinated C5-C8 ketone substance is vaporized and can be used as a gas boosting agent to better atomize and then vaporize a perfluorinated C5-C10 alkane and alkene mixture under the liquid state condition, so that a better and rapid fire extinguishing effect is achieved.
Description
Technical Field
The application relates to the technical field of lithium battery fire extinguishing agents, in particular to a lithium battery fire extinguishing agent and a lithium battery prepared by using the same.
Background
New energy automobiles are more and more accepted by the public, have already occupied a larger share of the automobile market, and become one of the important components of the current automobile market. At present, the main contradiction limiting the development of new energy automobiles is the safety problem of lithium batteries. Automobile accidents of new energy automobiles caused by lithium battery safety are frequently reported by media at home and abroad, so that the public has a great fear on the safety performance of the new energy automobiles, and consumption and development of the new energy automobiles are limited.
In order to improve the safety problem of lithium batteries, related technologies such as a lithium battery fire extinguishing agent and a lithium battery fire extinguishing device disclosed in publication No. CN 109589541A-comprise a dry powder fire extinguishing mixture and an aluminum hydroxide and calcium oxide mixture, wherein the aluminum hydroxide and calcium oxide mixture comprises powdered aluminum hydroxide and calcium oxide powder, wherein 6-8 parts by weight of aluminum hydroxide and 2-4 parts by weight of calcium oxide are added; the dry powder fire extinguishing mixture is prepared from the following raw materials, by weight, 40-50 parts of modified montmorillonite powder, 5-10 parts of mica powder, 20-30 parts of carbonic acid hinge and 20-30 parts of modified activated sludge powder; 10-15 parts of hydrated zinc sulfide, 6-8 parts of calcium oxide, 5-8 parts of magnesium stearate, 3-5 parts of emulsified silicone oil, 2-4 parts of zinc borate, 1-3 parts of chlorinated paraffin and 4-5 parts of diatomite.
To the lithium battery fire extinguishing agent and the lithium battery fire extinguishing apparatus in the above-mentioned correlation technique, the inventor finds the following technical defects: lithium cell fire extinguishing agent and lithium cell extinguishing device among the correlation technique can solve current conventional fire extinguishing agent and can not absorb the lithium cell heating effectively and produce toxic gas, easily cause the circuit short circuit, and can further produce new high temperature heat source, the defect of stretching of aggravation intensity of a fire, but lithium cell fire extinguishing agent among the correlation technique still can not deal with because the problem that the whole fast and the high lithium cell that leads to of the high temperature of firing of the battery module that leads to of lithium cell high temperature effectively puts out a fire fast, there is the lithium cell hidden danger of catching a fire in new energy automobile's battery module field still.
Disclosure of Invention
In order to solve the technical problem, the application provides a lithium battery fire extinguishing agent and a lithium battery prepared by using the same.
In a first aspect, the application provides a lithium battery fire extinguishing agent, which is realized by the following scheme:
a lithium battery fire extinguishing agent is mainly composed of perfluorinated C5-C8 ketone substances, perfluorinated C5-C10 alkane and alkene mixtures; the perfluorinated C5-C8 ketone substance is at least one of perfluorinated C5-C8 ketone or at least one of fluoride corresponding to the perfluorinated C5-C8 ketone or at least one of corresponding isomers of the perfluorinated C5-C8 ketone; the mixture of the perfluorinated C5-C10 alkane and the olefin is formed by mixing perfluorinated C5-C10 alkane substances and perfluorinated C5-C10 alkene substances in any ratio; the perfluoro C5-C10 alkane substance is at least one of perfluoro C5-C10 olefin, or at least one of fluoride corresponding to the perfluoro C5-C10 olefin, or at least one of corresponding isomers of the perfluoro C5-C10 olefin; the perfluoro C5-C10 alkene substance is at least one of perfluoro C5-C10 alkane, or at least one of fluoride corresponding to the perfluoro C5-C10 alkane, or at least one of corresponding isomers of the perfluoro C5-C10 alkane.
When the lithium battery fire extinguishing agent in the application is applied to the lithium battery and the lithium battery encounters a lithium battery accident, in the temperature rise process of the lithium battery, the front-segment perfluorinated C5-C8 ketone substances are vaporized and can be used as a gas boosting agent, the perfluorinated C5-C10 alkane and alkene mixture is better atomized and then vaporized under the liquid condition, and the better quick fire extinguishing effect is achieved. And the lithium battery fire extinguishing agent in this application not only has the function of putting out a fire fast, can avoid moreover causing secondary destruction to new energy automobile group battery, effectively preserves the lithium cell electricity core that does not take place the accident, effectively reduces the economic loss that the battery accident brought.
Preferably, the compound mainly comprises perfluorinated C5-C8 ketone substances and a mixture of perfluorinated C7-C10 alkane and alkene; the perfluorinated C5-C8 ketone substance is at least one of perfluorinated C5-C8 ketone; the difference between the quantity of C in the perfluorinated C5-C8 ketone substance and the quantity of C in a perfluorinated C7-C10 alkane substance in the mixture of the perfluorinated C7-C10 alkane and alkene is more than or equal to 2; the difference between the C number in the perfluorinated C5-C8 ketone substance and the C number in the perfluorinated C7-C10 alkene substance in the perfluorinated C7-C10 alkane and alkene mixture is more than or equal to 2.
By adopting the technical scheme, the difference of the vaporization temperatures of the perfluorinated C5-C8 ketone substance, the perfluorinated C7-C10 alkane and alkene mixture is ensured, so that the perfluorinated C5-C8 ketone substance at the front section is vaporized in the temperature rising process of the lithium battery and can be used as a gas boosting agent to atomize and vaporize the perfluorinated C7-C10 alkane and alkene mixture under the liquid state better, and a better rapid fire extinguishing effect is achieved.
Preferably, the compound mainly consists of perfluorohexanone and a mixture of perfluoroC 7-C8 ketone.
The perfluorohexanone has the extinguishing concentration of 4-6 percent and higher safety margin, and is safer for human bodies when in use. Perfluorohexanone is liquid under the normal temperature, does not belong to dangerous goods again, can use safely under the ordinary pressure state, and perfluorohexanone can not frozen under-20 ℃, and the storability is relatively better, and then guarantees that this application can play better quick fire extinguishing effect and easily realizes the industrial production manufacturing, reduction in production cost.
Preferably, the composition mainly comprises perfluorohexanone, a mixture of perfluoro C7-C10 alkane and alkene.
By adopting the technical scheme, the difference of vaporization temperatures of the perfluorohexanone, the perfluoroC 7-C10 alkane and alkene mixture is ensured, and a good and rapid fire extinguishing effect is achieved.
Preferably, the compound mainly consists of perfluorohexanone, a mixture of perfluoro C8-C10 alkane and alkene.
By adopting the technical scheme, the difference of vaporization temperatures of the perfluorohexanone, the perfluoroC 8-C10 alkane and alkene mixture is ensured, and a better and rapid fire extinguishing effect is achieved.
Preferably, the composition mainly comprises perfluorohexanone, a perfluoroC 9 alkane and a perfluoroolefin mixture.
By adopting the technical scheme, the differences of the vaporization temperatures of the perfluorohexanone, the perfluoroC 7-C10 alkane and alkene mixtures are further ensured, a better and rapid fire extinguishing effect is achieved, the industrial production and manufacturing are easily realized, and the production cost is reduced.
Preferably, the composition mainly comprises perfluorohexanone and perfluorononene; the perfluorohexanone and the perfluorononene are mixed in any ratio.
By adopting the technical scheme, the perfluorohexanone and the perfluorononene have different vaporization temperatures, the vaporization temperature of the perfluorohexanone is 49 ℃, the vaporization temperature of the perfluorononene is 110 ℃, the two-section cooling and fire extinguishing effects can be achieved, the difference of the vaporization temperatures of the perfluorohexanone, the perfluoroC 7-C10 alkane and the alkene mixture is further ensured, the better and rapid fire extinguishing effect is achieved, the industrial production and manufacturing are easily realized, and the production cost is reduced.
Preferably, the molar ratio of the perfluorohexanone to the perfluorononene is controlled to be (0.1-25): 1.
by adopting the technical scheme, the industrial production and manufacturing are easy to realize, and the production cost is reduced.
In a second aspect, the application provides a lithium battery prepared by using a lithium battery extinguishing agent, which is realized by the following technical scheme:
a lithium battery prepared by using a lithium battery fire extinguishing agent comprises a lithium battery installation shell, a plurality of lithium battery cells, a lithium battery installation top cover, a fire extinguishing filler support and a fire extinguishing filler bag, wherein the lithium battery cells are detachably connected in the lithium battery installation shell; the adjacent lithium battery electric cores are mutually spaced; the lithium battery mounting top cover is detachably connected to the top of the lithium battery mounting shell to form a mounting cavity; the fire extinguishing filler support is arranged between the top of the lithium battery cell and the lithium battery mounting top cover and is positioned in the mounting cavity; the fire extinguishing filler bag is fixedly connected to the fire extinguishing filler bracket; the fire extinguishing filler bag comprises an outer film layer and the lithium battery fire extinguishing agent filled in the outer film layer.
Adopt the lithium cell of lithium cell fire extinguishing agent preparation in this application, meet with the lithium cell accident when this lithium cell, at the lithium cell temperature in-process that rises, anterior segment perfluor C5-C8 ketone material has vaporized, and can regard as gaseous boosting agent again, atomize then the vaporization with perfluor C5-C10 alkane, alkene mixture better under the liquid condition, play better quick fire extinguishing effect.
Lithium cell fire extinguishing agent preparation's lithium cell in this application, because the setting of filler support of putting out a fire can effectively be avoided putting out a fire in filler package and the new energy automobile battery module electric core surface, lithium cell module shell lid surperficial friction probability, reduces the car and goes vibrations to the loss of rubbing of filler package of putting out a fire, guarantees the life and the experimental stability of filler package of putting out a fire. In addition, the setting of filler support of putting out a fire is convenient for put out a fire the installation of filler package, can make when the filler package of putting out a fire carries out directional blasting to the direction of lithium cell electricity core, improves new energy automobile's whole car security. To sum up, this application utilizes the lithium cell of lithium cell fire extinguishing agent preparation can effectively improve the effective rate of putting out a fire of fill pack of putting out a fire, extinguishes the burning things which may cause a fire disaster fast, realizes simultaneously that the fill pack of will putting out a fire should actually be transported in the industrial production of new energy automobile battery module, breaks the development bottleneck of restriction new energy automobile.
Preferably, still include first silica gel cushion, first silica gel cushion sets up in lithium cell installation top cap, between the filler support of putting out a fire, and first silica gel cushion is located and settles the cavity.
Through adopting above-mentioned technical scheme, can promote the installation stability of this application, realize will putting out a fire the packing package and actually should transport in the industrial production of new energy automobile battery module.
In summary, the present application has the following advantages:
1. adopt the lithium cell of lithium cell fire extinguishing agent preparation in this application, meet with the lithium cell accident when this lithium cell, at the lithium cell temperature in-process that rises, anterior segment perfluor C5-C8 ketone material has vaporized, and can regard as gaseous boosting agent again, atomize then the vaporization with perfluor C5-C10 alkane, alkene mixture better under the liquid condition, play better quick fire extinguishing effect.
2. Lithium cell fire extinguishing agent preparation's lithium cell in this application, because the setting of filler support of putting out a fire can effectively be avoided putting out a fire in filler package and the new energy automobile battery module electric core surface, lithium cell module shell lid surperficial friction probability, reduces the car and goes vibrations to the loss of rubbing of filler package of putting out a fire, guarantees the life and the experimental stability of filler package of putting out a fire.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment in the present application.
Fig. 2 is a schematic view of a connection structure between a lithium battery mounting case and a lithium battery cell in an embodiment of the present application.
Fig. 3 is a partially enlarged view of a point a in fig. 2.
Fig. 4 is a schematic structural diagram of the fire extinguishing filler support in the embodiment of the application, and shows a structure that a transverse plate of the support is provided with a burst hole.
Fig. 5 is a schematic structural view of a fire extinguishing filler support in the embodiment of the application, showing a structure of a support riser with a burst hole.
Fig. 6 is a schematic structural view of the fire extinguishing filler support in the embodiment of the application, showing the structure that the transverse plate and the support vertical plate of the support are both provided with the burst holes.
Fig. 7 is the structural schematic diagram of the fire extinguishing filler support in the embodiment of the application, and shows that the structure that the burst hole is opened on the horizontal plate and the vertical support plate of the support, and the break-through notch is opened on the vertical lower surface of the support.
Fig. 8 is a schematic view of an installation structure of a fire extinguishing filler support and a lithium battery cell in the embodiment of the present application, and mainly shows that the fire extinguishing filler support is arranged between two electrodes of the lithium battery cell.
Fig. 9 is a schematic diagram of an installation structure of a fire extinguishing filler support and a lithium battery cell in the embodiment of the application, and mainly shows that the fire extinguishing filler support is arranged between an electrode and a blast hole of the lithium battery cell and on the upper part of the blast hole of the lithium battery cell.
Fig. 10 is a schematic view of an installation structure of a fire extinguishing filler support and a lithium battery cell in an embodiment of the present application, which mainly shows that a single fire extinguishing filler support is disposed between electrodes of a single lithium battery cell.
In the figure, 1, a lithium battery mounting shell; 10. arranging a cavity; 11. caulking grooves; 12. a flame retardant rubber liner; 2. a lithium battery cell; 3. a lithium battery mounting top cover; 4. a fire extinguishing filler support; 40. breaking the hole; 400. breaking through the gap; 41. a bracket transverse plate; 42. a support vertical plate; 43. a filler placement tank; 44. a limiting bar; 5. a fire extinguishing filler bag; 51. an outer film layer; 6. a first silicone rubber elastic pad; 7. a second silica gel elastic pad.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples.
Examples
The application discloses a lithium battery fire extinguishing agent which is composed of perfluorinated C5-C8 ketone substances and a perfluorinated C5-C10 alkane and alkene mixture.
The perfluor C5-C8 ketone substance is at least one of perfluor C5-C8 ketone or at least one of fluoride corresponding to the perfluor C5-C8 ketone or at least one of corresponding isomers of the perfluor C5-C8 ketone. Preferably, the perfluor C5-C8 ketone is perfluorhexanone matched with perfluorheptanone and perfluoroctanone.
Further preferred embodiments herein are perfluorohexanones or perfluoroheptanones.
The mixture of perfluoro C5-C10 alkane and olefin is prepared by mixing perfluoro C5-C10 alkane and perfluoro C5-C10 alkene in any ratio.
The perfluoro C5-C10 alkane substance is at least one of perfluoro C5-C10 olefin, or at least one of fluoride corresponding to the perfluoro C5-C10 olefin, or at least one of corresponding isomers of the perfluoro C5-C10 olefin.
The perfluoro C5-C10 alkene substance is at least one of perfluoro C5-C10 alkane, at least one of fluoride corresponding to the perfluoro C5-C10 alkane or at least one of corresponding isomers of the perfluoro C5-C10 alkane.
Furthermore, the lithium battery fire extinguishing agent consists of perfluorohexanone or perfluoroheptanone matched with a mixture of perfluoro C7-C10 alkane and alkene. The difference between the quantity of C in the perfluorinated C5-C8 ketone substance and the quantity of C in the perfluorinated C7-C10 alkane substance in the mixture of the perfluorinated C7-C10 alkane and alkene is more than or equal to 2; the difference between the C number in the perfluorinated C5-C8 ketone substance and the C number in the perfluorinated C7-C10 alkene substance in the perfluorinated C7-C10 alkane and alkene mixture is more than or equal to 2.
When the perfluor C5-C8 ketone is perfluor hexanone, the perfluor C7-C10 alkane and alkene mixture is selected from perfluor C8-C10 alkane and alkene mixture, preferably perfluor octane, alkene mixture or perfluor nonane, alkene mixture or perfluor decane and alkene mixture.
When the perfluor C5-C8 ketone is perfluorheptanone, the perfluor C7-C10 alkane and alkene mixture is perfluor nonane, alkene mixture or perfluor decane and alkene mixture.
When the perfluor C5-C8 ketone is perfluoroctanone, the perfluor C7-C10 alkane and alkene mixture is perfluor decane and alkene mixture.
The best scheme on the formula of the application is as follows: the lithium battery fire extinguishing agent is formed by mixing perfluorohexanone and perfluorononene in any ratio. Preferably, the mass ratio of the perfluorohexanone to the perfluorononene is controlled to be (0.1-25): 1, preferably 19.
Lithium cell fire extinguishing agent in this application is applied to the lithium cell and this lithium cell meets the lithium cell accident, and at lithium cell temperature rise in-process, anterior segment perfluor has already been vaporized by ketone material, and can regard as gaseous boosting agent again, atomizes then the vaporization with perfluor nonene better under the liquid condition, plays better quick fire extinguishing effect. And the lithium battery fire extinguishing agent in this application not only has the function of putting out a fire fast, can avoid moreover causing secondary destruction to new energy automobile group battery, effectively preserves the lithium cell electricity core that does not take place the accident, effectively reduces the economic loss that the battery accident brought.
Referring to fig. 1, a lithium battery prepared by using the above lithium battery fire extinguishing agent comprises a lithium battery installation shell 1, a plurality of lithium battery cells 2, a lithium battery installation top cover 3, a fire extinguishing filler support 4, a fire extinguishing filler bag 5, a first silica gel elastic cushion 6 and a second silica gel elastic cushion 7. First silica gel cushion 6 sets up in lithium cell installation top cap 3, put out a fire between filler support 4. The second silica gel elastic cushion 7 is arranged between the lithium battery cell 2 and the fire extinguishing filler support 4.
Referring to fig. 2 and 3, the lithium battery mounting case 1 is formed at an inner wall thereof with caulking grooves 11 spaced apart from each other, and a flame retardant rubber lining 12 is fixedly coupled to the caulking grooves 11. Lithium battery cell 2 joint has realized that lithium battery cell 2 can dismantle and connect in lithium battery erection shell 1 between flame retardant rubber inside lining 12 for adjacent lithium battery cell 2 is apart from each other, reserves the radiating clearance cavity of being convenient for of formation.
Referring to fig. 1 and 2, the lithium battery mounting top cover 3 is detachably connected to the top of the lithium battery mounting case 1 by bolts, so that a mounting cavity 10 is formed between the lithium battery mounting top cover 3 and the lithium battery mounting case 1. Lithium battery electricity core 2, filler support 4, the filler bag 5 of putting out a fire, first silica gel cushion 6 and second silica gel cushion 7 all set up inside settling cavity 10.
Referring to fig. 1, the fire extinguishing filler support 4 is made of poor conductor material, which may be selected from HDPE, PVC, PA6, PA66, PP, surface-oxidized aluminum or aluminum alloy. The fire extinguishing filler support 4 comprises a support transverse plate 41 and two support vertical plates 42, wherein one support vertical plate 42 is integrally formed on the lower surface of the support transverse plate 41, and the side surface of the support vertical plate 42 is flush with the side surface of the support transverse plate 41 in the length direction. Wherein, another supporting vertical plate 42 is integrally formed on the lower surface of the support transverse plate 41, and the side surface of the supporting vertical plate 42 is flush with the side surface of the support transverse plate 41 in the length direction. The two support risers 42 are symmetrical about a vertically bisected plane lengthwise of the bracket cross plate 41. The two ends of the support main body are sealed, and the sealing mode adopts the sealing of an integrally formed vertical plate or the sealing of glue. A packing placing groove 43 for fixing a fire extinguishing packing is formed adjacent to the supporting vertical plate 42 and the supporting transverse plate 41.
Referring to fig. 1, the bottom of the inner side of the supporting vertical plate 42 is formed with a limiting strip 44 along the length direction thereof for limiting the movement of the fire extinguishing filler bag 5, so that the bracket in the application can reduce the abrasion of the automobile driving vibration to the fire extinguishing filler bag, and improve the service life and the service stability of the fire extinguishing filler bag. The formation of the restriction strips 44 in this application comprises the solidification of glue to form the fire extinguishing filler support 4 by injection molding. The mode that the glue solidifies and forms the limit strip 44, fill the fire extinguishing filler bag 5 in the filler settling groove 43 that support diaphragm 41 and support riser 42 formed first, adopt glue to coat in the bottom solidification that supports the riser 42 medial surface along supporting the riser 42 length direction and form the limit strip 44, fix the fire extinguishing filler bag in the filler settling groove 43 steadily, reduce the car and travel the vibrations to the wear of the fire extinguishing filler bag, promote the fire extinguishing filler bag life and stability in use. When the fire extinguishing filler support 4 is integrally molded, in order to avoid the edges and sharp points of the limiting strips 44 from causing structural damage to the film layer of the fire extinguishing filler bag, the geometric shapes of the limiting strips 44 are limited to right-angled triangular prisms, one right-angled surface of the limiting strips 44 is integrally formed on the inner side surface of the supporting vertical plate 42, and the other right-angled surface of the limiting strips 44 is flush with the bottom surface of the supporting vertical plate 42.
In order to facilitate the blasting of the fire extinguishing filler bag for fire extinguishing, the fire extinguishing filler support 4 is provided with a plurality of bursting holes 40. The three ways of forming the burst hole 40 are: referring to fig. 4, the first and the second breaking holes 40 are opened to the bracket transverse plate 41; referring to fig. 5, the second, through hole 40 is opened to a certain supporting riser 42; referring to fig. 6, third, the through holes 40 are opened in the support cross plate 41 and the two support risers 42.
Referring to fig. 7, in order to further facilitate the blasting of the fire extinguishing filler bag to extinguish fire, the lower surface of the supporting vertical plate 42 is provided with a plurality of saw-toothed breaking notches 400.
Three mounting modes of the fire extinguishing filler support 4 are as follows: referring to fig. 8, first, the fire extinguishing filler support 4 is disposed between two electrodes of the lithium battery cell 2 in the lithium battery module, and the length direction of the fire extinguishing filler support 4 is consistent with the length direction of the lithium battery installation casing 1, that is, the vertical projection of a single fire extinguishing filler support 4 is located between two electrodes of the lithium battery cell 2; referring to fig. 9, a second, fire extinguishing filler support 4 is provided between the electrodes of the lithium battery cell 2, the blast holes, and above the blast holes of the lithium battery cell 2; referring to fig. 10, third, a single fire extinguishing filler support 4 is disposed between two electrodes of a single lithium battery cell 2 in the lithium battery module, and the length direction of the fire extinguishing filler support 4 is consistent with the length direction of the lithium battery cell 2, that is, the vertical projection of the single fire extinguishing filler support 4 is located between two electrodes of the single lithium battery cell 2. The support in this application can be convenient for put out a fire the installation of filler bag, can be so that put out a fire when filler bag carries out directional blasting to the direction of group battery, improves new energy automobile's whole car security. In addition, support in this application can reduce the car and travel the vibrations and to the wearing and tearing of the filler bag of putting out a fire, promotes the life and the stability in use of filler bag of putting out a fire.
Referring to fig. 1, the fire extinguishing filler pack 5 includes an outer film layer 51 and the above-mentioned lithium battery fire extinguishing agent filled in the outer film layer 51. The material of the outer film layer 51 is selected from one of PE, PS, PET, EVA and silica gel film. The design pressure of the outer film layer 51 is 1.5-2.5 times of the saturated vapor pressure of the corresponding fire extinguishing agent at the highest temperature of the using scene. As a use scene of the lithium battery in the application, the maximum temperature of the use scene of the lithium battery in practical production and design is limited to 130 ℃, and the designed maximum bearing pressure of the outer film layer 51 is preferably 1.5 times of the saturated vapor pressure of the corresponding fire extinguishing agent. The preferred lithium battery fire extinguishing agent in this application is that perfluor hexanone, perfluor nonene are mixed by mass ratio 19, when the lithium cell accident, the temperature rises to 49 ℃, perfluor hexanone in the fire extinguishing agent begins the vaporization, the perfluor hexanone of vaporization is as gaseous propellant, atomize perfluor nonene under the liquid condition better, when the lithium cell temperature is greater than 110 ℃, make perfluor nonene vaporize fast under perfluor hexanone's the supplementary acceleration, when the temperature exceeds 130 ℃, fire extinguishing agent saturated steam pressure is greater than the design maximum bearing pressure of adventitia layer 51, make adventitia layer 51 to set up burst hole 40 and/or break through the direction of breach 400 and carry out directional blasting, the lithium cell fire extinguishing agent of gasification diffuses to the environment fast, play the effect of putting out a fire fast.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. A lithium battery fire extinguishing agent is characterized in that: mainly consists of perfluorinated C5-C8 ketone substances and a perfluorinated C5-C10 alkane and alkene mixture; the perfluorinated C5-C8 ketone substance is at least one of perfluorinated C5-C8 ketones, or at least one of fluorides corresponding to the perfluorinated C5-C8 ketones, or at least one of perfluorinated C5-C8 ketone corresponding isomers; the mixture of the perfluorinated C5-C10 alkane and the olefin is formed by mixing perfluorinated C5-C10 alkane substances and perfluorinated C5-C10 alkene substances in any ratio; the perfluoro C5-C10 alkane substance is at least one of perfluoro C5-C10 olefin, or at least one of fluoride corresponding to the perfluoro C5-C10 olefin, or at least one of corresponding isomers of the perfluoro C5-C10 olefin; the perfluoro C5-C10 alkene substance is at least one of perfluoro C5-C10 alkane, or at least one of fluoride corresponding to the perfluoro C5-C10 alkane, or at least one of corresponding isomers of the perfluoro C5-C10 alkane.
2. The lithium battery fire extinguishing agent according to claim 1, wherein: mainly consists of perfluorinated C5-C8 ketone substances and a perfluorinated C7-C10 alkane and alkene mixture; the perfluorinated C5-C8 ketone substance is at least one of perfluorinated C5-C8 ketone; the difference between the quantity of C in the perfluorinated C5-C8 ketone substance and the quantity of C in a perfluorinated C7-C10 alkane substance in the mixture of the perfluorinated C7-C10 alkane and alkene is more than or equal to 2; the difference between the quantity of C in the perfluorinated C5-C8 ketone substance and the quantity of C in the perfluorinated C7-C10 alkene substance in the perfluorinated C7-C10 alkane-alkene mixture is not less than 2.
3. The lithium battery fire extinguishing agent according to claim 1, wherein: mainly comprises a mixture of perfluorohexanone and perfluoroC 7-C8 ketone.
4. The lithium battery fire extinguishing agent according to claim 1, wherein: mainly comprises perfluorohexanone, a mixture of perfluoro C7-C10 alkane and alkene.
5. The lithium battery fire extinguishing agent according to claim 4, wherein: mainly comprises perfluorohexanone, a mixture of perfluoro C8-C10 alkane and alkene.
6. The lithium battery fire extinguishing agent according to claim 5, wherein: mainly comprises perfluorohexanone, a mixture of perfluoro C9 alkane and alkene.
7. The lithium battery fire extinguishing agent according to claim 1, wherein: mainly consists of perfluorohexanone and perfluorononene; the perfluorohexanone and the perfluorononene are mixed in any ratio.
8. The lithium battery fire extinguishing agent according to claim 7, wherein: the mol ratio of the perfluorohexanone to the perfluorononene is controlled to be (0.1-25): 1.
9. a lithium battery manufactured by using the fire extinguishing agent for lithium battery as claimed in claims 1 to 8, characterized in that: the fire extinguishing filler comprises a lithium battery installation shell (1), a plurality of lithium battery cells (2), a lithium battery installation top cover (3), a fire extinguishing filler support (4) and a fire extinguishing filler bag (5), wherein the lithium battery cells (2) are detachably connected in the lithium battery installation shell (1); the adjacent lithium battery electric cores (2) are mutually spaced; the lithium battery mounting top cover (3) is detachably connected to the top of the lithium battery mounting shell (1) to form a mounting cavity (10); the fire extinguishing filler support (4) is arranged between the top of the lithium battery cell (2) and the lithium battery mounting top cover (3) and is positioned in the mounting cavity (10); the fire extinguishing filler bag (5) is fixedly connected with the fire extinguishing filler bracket (4); the fire extinguishing filler pack (5) comprises an outer film layer (51) and the lithium battery fire extinguishing agent as defined in claims 1 to 8 filled in the outer film layer (51).
10. A lithium battery according to claim 9, prepared by using the fire extinguishing agent for lithium battery as claimed in claims 1 to 8, characterized in that: still include first silica gel cushion (6), first silica gel cushion (6) set up in lithium cell installation top cap (3), put out a fire between filler support (4), and first silica gel cushion (6) are located and settle cavity (10).
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| CN202211024782.3A CN115282544A (en) | 2022-08-25 | 2022-08-25 | Lithium battery fire extinguishing agent and lithium battery prepared by using same |
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| CN202211024782.3A CN115282544A (en) | 2022-08-25 | 2022-08-25 | Lithium battery fire extinguishing agent and lithium battery prepared by using same |
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