A lithium battery fire extinguishing agent and a lithium battery prepared using the same

Abstract

The present 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 using the same. A lithium battery fire extinguishing agent is mainly composed of a perfluoro C5-C8 ketone substance and a perfluoro C5-C10 alkane and alkene mixture; the perfluoro C5-C8 ketone substance is at least one of the perfluoro C5-C8 ketones or at least one of the fluorides corresponding to the perfluoro C5-C8 ketones or at least one of the corresponding isomers of the perfluoro C5-C8 ketones; the mixture of perfluoro C5-C10 alkanes and alkenes is formed by mixing perfluoro C5-C10 alkanes and perfluoro C5-C10 alkenes in any ratio. When a lithium battery accident occurs, during the process of the lithium battery temperature rising, the front-stage perfluoro C5-C8 ketone substance has been vaporized, and can also be used as a gas propellant to better atomize and then vaporize the perfluoro C5-C10 alkane and alkene mixture in a liquid state, achieving a better and faster fire extinguishing effect.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery fire extinguishing agents, and in particular to a lithium battery fire extinguishing agent and a lithium battery prepared using the same. Background Art

[0002] New energy vehicles are increasingly recognized by the public, occupying a large share of the automobile market and becoming an important part of the current automobile market. At present, the main contradiction restricting the development of new energy vehicles is the safety of lithium batteries. Domestic and foreign media often report on automobile accidents caused by lithium battery safety of new energy vehicles, which makes the public have concerns about the safety performance of new energy vehicles and limits the consumption and development of new energy vehicles.

[0003] In order to improve the safety issues of lithium batteries, related technologies such as the lithium battery fire extinguishing agent and lithium battery fire extinguishing device disclosed in announcement number CN109589541A- include a dry powder fire extinguishing mixture and a mixture of aluminum hydroxide and calcium oxide. The aluminum hydroxide and calcium oxide mixture includes powdered aluminum hydroxide and calcium oxide powder, wherein by weight, aluminum hydroxide is 6-8 parts and calcium oxide is 2-4 parts; the dry powder fire extinguishing mixture is made of the following raw materials in parts by weight: by weight, 40-50 parts of modified montmorillonite powder, 5-10 parts of mica powder, 20-30 parts of tantalum carbonate; 20-30 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 diatomaceous earth.

[0004] With respect to the lithium battery fire extinguishing agent and lithium battery fire extinguishing device in the above-mentioned related technology, the inventors have discovered the following technical defects: although the lithium battery fire extinguishing agent and lithium battery fire extinguishing device in the related technology can solve the defects that the existing conventional fire extinguishing agent cannot effectively absorb the heating of the lithium battery to produce toxic gases, easily cause circuit short circuit, and may further generate new high-temperature heat sources, exacerbating the spread of the fire, the lithium battery fire extinguishing agent in the related technology still cannot cope with the problem that the lithium battery cannot be quickly and effectively extinguished due to the high fire speed of the battery module as a whole and the high fire temperature caused by the excessively high temperature of the lithium battery. There is still a hidden danger of lithium battery fire in the battery module field of new energy vehicles. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a lithium battery fire extinguishing agent and a lithium battery prepared using the same.

[0006] In the first aspect, the present application provides a lithium battery fire extinguishing agent, which is achieved through the following scheme:

[0007] A lithium battery fire extinguishing agent and a mixture of perfluoro C5-C8 ketones and perfluoro C5-C10 alkanes and alkenes; the perfluoro C5-C8 ketones are at least one of the perfluoro C5-C8 ketones or at least one of the fluorides corresponding to the perfluoro C5-C8 ketones or at least one of the corresponding isomers of the perfluoro C5-C8 ketones; the mixture of perfluoro C5-C10 alkanes and alkenes is composed of perfluoro C5-C10 alkanes and perfluoro C5-C10 alkenes in any ratio. The perfluoro C5-C10 alkane substance is at least one of the perfluoro C5-C10 olefins, at least one of the fluorides corresponding to the perfluoro C5-C10 olefins, or at least one of the corresponding isomers of the perfluoro C5-C10 olefins; the perfluoro C5-C10 olefin substance is at least one of the perfluoro C5-C10 alkanes, at least one of the fluorides corresponding to the perfluoro C5-C10 alkanes, or at least one of the corresponding isomers of the perfluoro C5-C10 alkanes.

[0008] When the lithium battery fire extinguishing agent in this application is applied to a lithium battery and the lithium battery encounters a lithium battery accident, during the process of the lithium battery temperature rising, the front-stage perfluoro C5-C8 ketone substances have been vaporized, and can also be used as a gas propellant to better atomize the perfluoro C5-C10 alkane and alkene mixture in a liquid state and then vaporize it, achieving a better and faster fire extinguishing effect. Moreover, the lithium battery fire extinguishing agent in this application not only has the function of rapid fire extinguishing, but also can avoid secondary damage to the battery pack of new energy vehicles, effectively preserve the lithium battery cells that have not been in an accident, and effectively reduce the economic losses caused by battery accidents.

[0009] Preferably, it is mainly composed of a perfluoro C5-C8 ketone substance and a perfluoro C7-C10 alkane and alkene mixture; the perfluoro C5-C8 ketone substance is at least one of the perfluoro C5-C8 ketones; the difference between the number of C in the perfluoro C5-C8 ketone substance and the number of C in the perfluoro C7-C10 alkane and alkene mixture is ≥2; the difference between the number of C in the perfluoro C5-C8 ketone substance and the number of C in the perfluoro C7-C10 alkene substance in the perfluoro C7-C10 alkane and alkene mixture is ≥2.

[0010] By adopting the above technical scheme, the difference in vaporization temperature between perfluoro C5-C8 ketone substances and perfluoro C7-C10 alkane and alkene mixture is ensured, so that in the process of lithium battery temperature rising, the front perfluoro C5-C8 ketone substances have been vaporized and can also be used as a gas propellant to better atomize and then vaporize the perfluoro C7-C10 alkane and alkene mixture in a liquid state, thereby achieving a better and faster fire extinguishing effect.

[0011] Preferably, it is mainly composed of a mixture of perfluorohexanone and perfluoro C7-C8 ketone.

[0012] The fire extinguishing concentration of perfluorohexanone is 4-6%, and the safety margin is relatively high, which is safer for the human body when used. Perfluorohexanone is a liquid at room temperature and is not a dangerous item. It can be used safely under normal pressure. Perfluorohexanone will not be frozen at -20°C and has relatively good storage properties, thereby ensuring that this application can achieve better and faster fire extinguishing effects and is easy to realize industrial production and manufacturing, reducing production costs.

[0013] Preferably, it is mainly composed of perfluorohexanone and a mixture of perfluoro C7-C10 alkanes and alkenes.

[0014] By adopting the above technical scheme, the difference in vaporization temperature between perfluorohexanone and perfluoro C7-C10 alkane and alkene mixture is ensured, thereby achieving a better and faster fire extinguishing effect.

[0015] Preferably, it is mainly composed of perfluorohexanone and a mixture of perfluoro C8-C10 alkanes and alkenes.

[0016] By adopting the above technical solution, the difference in vaporization temperature between perfluorohexanone and perfluoro C8-C10 alkane and alkene mixture is ensured, thereby achieving a better and faster fire extinguishing effect.

[0017] Preferably, it is mainly composed of perfluorohexanone and a mixture of perfluoro C9 alkanes and alkenes.

[0018] By adopting the above technical scheme, the difference in vaporization temperature between perfluorohexanone and perfluoro C7-C10 alkane and alkene mixture is further ensured, which achieves better and faster fire extinguishing effect, and is easy to realize industrial production and manufacturing, thereby reducing production costs.

[0019] Preferably, the main component is perfluorohexanone and perfluorononene; the perfluorohexanone and the perfluorononene are mixed in any ratio.

[0020] By adopting the above technical scheme, perfluorohexanone and perfluorononene have different vaporization temperatures, the vaporization temperature of perfluorohexanone is 49°C, and the vaporization temperature of perfluorononene is 110°C, which can achieve double-stage cooling and fire extinguishing effects, further ensure the difference in vaporization temperatures of perfluorohexanone and perfluoro C7-C10 alkane and alkene mixture, achieve better and faster fire extinguishing effects, and easily realize industrial production and manufacturing, thereby reducing production costs.

[0021] Preferably, the molar ratio of the perfluorohexanone to the perfluorononene is controlled at (0.1-25):1.

[0022] By adopting the above technical solution, industrialized production and manufacturing can be easily realized and production costs can be reduced.

[0023] In the second aspect, the present application provides a lithium battery prepared using a lithium battery fire extinguishing agent, which is achieved through the following technical solutions:

[0024] A lithium battery prepared using a lithium battery fire extinguishing agent, comprising a lithium battery mounting shell, a plurality of lithium battery cells, a lithium battery mounting top cover, a fire extinguishing filler bracket, and a fire extinguishing filler pack, wherein the lithium battery cells are detachably connected to the lithium battery mounting shell; adjacent lithium battery cells are spaced apart from each other; the lithium battery mounting top cover is detachably connected to the top of the lithium battery mounting shell to form an accommodation cavity; the fire extinguishing filler bracket is disposed between the top of the lithium battery cell and the lithium battery mounting top cover and is located in the accommodation cavity; the fire extinguishing filler pack is fixedly connected to the fire extinguishing filler bracket; the fire extinguishing filler pack comprises an outer film layer and the above-mentioned lithium battery fire extinguishing agent filled in the outer film layer.

[0025] When a lithium battery prepared by the lithium battery fire extinguishing agent of the present application encounters a lithium battery accident, during the process of the lithium battery temperature rising, the front-stage perfluoro C5-C8 ketone substance has been vaporized and can also be used as a gas propellant to better atomize and then vaporize the perfluoro C5-C10 alkane and alkene mixture in a liquid state, thereby achieving a better and faster fire extinguishing effect.

[0026] The lithium battery prepared by the lithium battery fire extinguishing agent in the present application can effectively avoid the probability of friction between the fire extinguishing filler package and the surface of the battery cell in the battery module of the new energy vehicle and the surface of the outer shell cover of the lithium battery module due to the setting of the fire extinguishing filler bracket, reduce the wear and tear of the fire extinguishing filler package caused by the vibration of the vehicle driving, and ensure the service life and test stability of the fire extinguishing filler package. In addition, the setting of the fire extinguishing filler bracket facilitates the installation of the fire extinguishing filler package, and can improve the safety of the whole new energy vehicle when the fire extinguishing filler package is directional blasted in the direction of the lithium battery cell. In summary, the lithium battery prepared by the lithium battery fire extinguishing agent in the present application can effectively improve the effective fire extinguishing rate of the fire extinguishing filler package, quickly extinguish the fire source, and at the same time realize the actual application of the fire extinguishing filler package in the industrial production of the battery module of the new energy vehicle, breaking the bottleneck that restricts the development of new energy vehicles.

[0027] Preferably, it also includes a first silicone elastic pad, which is arranged between the lithium battery installation top cover and the fire extinguishing filler bracket, and the first silicone elastic pad is located in the installation cavity.

[0028] By adopting the above technical solution, the installation stability of the present application can be improved, and the fire extinguishing filler pack can be actually applied to the industrial production of new energy vehicle battery modules.

[0029] In summary, this application has the following advantages:

[0030] 1. When a lithium battery prepared by the lithium battery fire extinguishing agent of the present application encounters a lithium battery accident, during the process of the lithium battery temperature rising, the front-stage perfluoro C5-C8 ketone substance has been vaporized, and can also be used as a gas propellant to better atomize and then vaporize the perfluoro C5-C10 alkane and alkene mixture in a liquid state, thereby achieving a better and faster fire extinguishing effect.

[0031] 2. The lithium battery prepared with the lithium battery fire extinguishing agent in this application can effectively avoid the probability of friction between the fire extinguishing filler package and the surface of the battery cell in the new energy vehicle battery module and the surface of the lithium battery module outer shell cover due to the setting of the fire extinguishing filler bracket, reduce the wear of the fire extinguishing filler package caused by the vibration of the vehicle running, and ensure the service life and test stability of the fire extinguishing filler package. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the embodiment in this application.

[0033] Figure 2 It is a schematic diagram of the connection structure between the lithium battery mounting housing and the lithium battery cell in the embodiment of the present application.

[0034] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0035] Figure 4 It is a schematic diagram of the structure of the fire extinguishing filler bracket in the embodiment of the present application, showing the structure of the breakthrough hole provided on the horizontal plate of the bracket.

[0036] Figure 5 It is a schematic diagram of the structure of the fire extinguishing filler bracket in the embodiment of the present application, showing the structure of the breakthrough hole provided on the supporting vertical plate.

[0037] Figure 6 It is a schematic diagram of the structure of the fire extinguishing filler bracket in the embodiment of the present application, showing a structure in which breakthrough holes are provided on both the horizontal plate and the supporting vertical plate of the bracket.

[0038] Figure 7 It is a schematic diagram of the structure of the fire extinguishing filler bracket in the embodiment of the present application, showing a structure in which breakthrough holes are provided on the horizontal plate and the vertical support plate of the bracket, and a breakthrough notch is provided on the lower surface of the vertical support plate.

[0039] Figure 8 It is a schematic diagram of the installation structure of the fire extinguishing filler bracket and the lithium battery cell in the embodiment of the present application, mainly showing that the fire extinguishing filler bracket is arranged between the two electrodes of the lithium battery cell.

[0040] Fig. 9 It is a schematic diagram of the installation structure of the fire extinguishing filler bracket and the lithium battery cell in the embodiment of the present application, mainly showing that the fire extinguishing filler bracket is arranged between the electrode and the blasting hole of the lithium battery cell and on the upper part of the blasting hole of the lithium battery cell.

[0041] Fig.10 It is a schematic diagram of the installation structure of the fire extinguishing filler bracket and the lithium battery cell in the embodiment of the present application, mainly showing that a single fire extinguishing filler bracket is arranged between the electrodes of a single lithium battery cell.

[0042] In the figure, 1. lithium battery mounting shell; 10. mounting cavity; 11. embedding groove; 12. flame retardant rubber lining; 2. lithium battery cell; 3. lithium battery mounting top cover; 4. fire extinguishing filler bracket; 40. breakthrough hole; 400. breakthrough notch; 41. bracket horizontal plate; 42. supporting vertical plate; 43. filler mounting groove; 44. limiting strip; 5. fire extinguishing filler bag; 51. outer film layer; 6. first silicone elastic pad; 7. second silicone elastic pad. DETAILED DESCRIPTION

[0043] The present application is further described in detail below with reference to the accompanying drawings and embodiments. Example

[0044] The present application discloses a lithium battery fire extinguishing agent composed of a mixture of perfluoro C5-C8 ketone substances and perfluoro C5-C10 alkanes and alkenes.

[0045] The perfluoro C5-C8 ketone substance is at least one of the perfluoro C5-C8 ketones, at least one of the fluorides corresponding to the perfluoro C5-C8 ketones, or at least one of the corresponding isomers of the perfluoro C5-C8 ketones. Preferably, the perfluoro C5-C8 ketone substance is perfluorohexanone combined with perfluoroheptanone and perfluorooctanone.

[0046] A further preferred option in the present application is perfluorohexanone or perfluoroheptanone.

[0047] The mixture of perfluoro C5-C10 alkanes and alkenes is prepared by mixing perfluoro C5-C10 alkane substances and perfluoro C5-C10 olefin substances in any proportion.

[0048] The perfluoro C5-C10 alkane substance is at least one of perfluoro C5-C10 olefins, at least one of the fluorinated compounds corresponding to the perfluoro C5-C10 olefins, or at least one of the corresponding isomers of the perfluoro C5-C10 olefins.

[0049] The perfluoro C5-C10 olefinic substance is at least one of perfluoro C5-C10 alkanes, at least one of the fluorinated compounds corresponding to the perfluoro C5-C10 alkanes, or at least one of the corresponding isomers of the perfluoro C5-C10 alkanes.

[0050] Furthermore, the lithium battery fire extinguishing agent in the present application is composed of perfluorohexanone or perfluoroheptanone combined with a perfluoro C7-C10 alkane and alkene mixture. The difference between the number of C in the perfluoro C5-C8 ketone substance and the number of C in the perfluoro C7-C10 alkane and alkene mixture is ≥2; the difference between the number of C in the perfluoro C5-C8 ketone substance and the number of C in the perfluoro C7-C10 alkene substance in the perfluoro C7-C10 alkene mixture is ≥2.

[0051] When the perfluoro C5-C8 ketone substance is perfluorohexanone, the perfluoro C7-C10 alkane-alkene mixture is selected as a perfluoro C8-C10 alkane-alkene mixture, preferably a perfluorooctane-alkene mixture or a perfluorononane-alkene mixture or a perfluorodecane-alkene mixture.

[0052] When the perfluoro C5-C8 ketone substance is perfluoroheptanone, the perfluoro C7-C10 alkane-olefin mixture is selected as perfluorononane-olefin mixture or perfluorodecane-olefin mixture.

[0053] When the perfluoro C5-C8 ketone substance is perfluorooctanone, the perfluoro C7-C10 alkane-alkene mixture is selected as a perfluorodecane-alkene mixture.

[0054] The best solution for the formulation of this application: The lithium battery fire extinguishing agent in this application is made by mixing perfluorohexanone with perfluorononene in any ratio. Preferably, the mass ratio of perfluorohexanone to perfluorononene is controlled at (0.1-25):1, and the preferred choice is 19:1.

[0055] When the lithium battery fire extinguishing agent in this application is applied to a lithium battery and the lithium battery encounters a lithium battery accident, during the process of the lithium battery temperature rising, the front-stage perfluorohexanone-like substance has been vaporized, and can also be used as a gas propellant to better atomize and then vaporize perfluorononene in a liquid state, achieving a better and faster fire extinguishing effect. The lithium battery fire extinguishing agent in this application not only has the function of rapid fire extinguishing, but also can avoid secondary damage to the battery pack of new energy vehicles, effectively preserve lithium battery cells that have not been in an accident, and effectively reduce the economic losses caused by battery accidents.

[0056] refer to Figure 1 A lithium battery prepared by using the above-mentioned lithium battery fire extinguishing agent includes a lithium battery mounting shell 1, a plurality of lithium battery cells 2, a lithium battery mounting top cover 3, a fire extinguishing filler bracket 4, a fire extinguishing filler package 5, a first silicone elastic pad 6 and a second silicone elastic pad 7. The first silicone elastic pad 6 is arranged between the lithium battery mounting top cover 3 and the fire extinguishing filler bracket 4. The second silicone elastic pad 7 is arranged between the lithium battery cell 2 and the fire extinguishing filler bracket 4.

[0057] refer to Figure 2 and Figure 3 The inner wall of the lithium battery mounting housing 1 is formed with mutually spaced embedding grooves 11, and a flame retardant rubber lining 12 is fixedly connected in the embedding groove 11. The lithium battery cell 2 is clamped between the flame retardant rubber lining 12, so that the lithium battery cell 2 can be detachably connected to the lithium battery mounting housing 1, so that adjacent lithium battery cells 2 are spaced from each other, and a gap cavity is reserved to facilitate heat dissipation.

[0058] refer to Figure 1 and Figure 2The lithium battery mounting top cover 3 is detachably connected to the top of the lithium battery mounting shell 1 by bolts, so that a placement cavity 10 is formed between the lithium battery mounting top cover 3 and the lithium battery mounting shell 1. The lithium battery cell 2, the fire extinguishing filler bracket 4, the fire extinguishing filler pack 5, the first silicone elastic pad 6 and the second silicone elastic pad 7 are all arranged inside the placement cavity 10.

[0059] refer to Figure 1 The fire extinguishing filler bracket 4 is made of a poor conductor material, and the poor conductor material can be selected from HDPE, PVC, PA6, PA66, PP material, aluminum or aluminum alloy with surface oxidation treatment. The fire extinguishing filler bracket 4 includes a bracket horizontal plate 41 and two supporting vertical plates 42, one of which is integrally formed on the lower surface of the bracket horizontal plate 41, and the side of the supporting vertical plate 42 is flush with the side of the bracket horizontal plate 41 in the length direction. Among them, the other supporting vertical plate 42 is integrally formed on the lower surface of the bracket horizontal plate 41, and the side of the supporting vertical plate 42 is flush with the side of the bracket horizontal plate 41 in the length direction. The two supporting vertical plates 42 are symmetrical about the vertical bisector of the bracket horizontal plate 41 along the length direction. The two ends of the bracket body are sealed, and the sealing method adopts an integrally formed vertical plate sealing or glue sealing. Adjacent supporting vertical plates 42 and bracket horizontal plates 41 form a filler placement groove 43 for fixing the fire extinguishing filler package.

[0060] refer to Figure 1 , the bottom of the inner side surface of the support vertical plate 42 is formed with a limiting strip 44 along its own length direction for limiting the movement of the fire extinguishing filling package 5. Therefore, the bracket in this application can reduce the wear of the fire extinguishing filling package caused by the vibration of the car's driving, and improve the service life and stability of the fire extinguishing filling package. The limiting strip 44 in this application is formed by glue curing and is integrally formed with the fire extinguishing filling bracket 4 by injection molding. The method of forming the limiting strip 44 by glue curing is to first fill the fire extinguishing filling package 5 in the filling placement groove 43 formed by the bracket cross plate 41 and the support vertical plate 42, and then use glue to coat the bottom of the inner side surface of the support vertical plate 42 along the length direction of the support vertical plate 42 to solidify to form the limiting strip 44, stably fix the fire extinguishing filling package in the filling placement groove 43, reduce the wear of the fire extinguishing filling package caused by the vibration of the car's driving, and improve the service life and stability of the fire extinguishing filling package. When the fire extinguishing filler bracket 4 is integrally injection-molded, in order to prevent the edges and sharp points of the limiting strip 44 from causing structural damage to the film layer of the fire extinguishing filler package, the geometric shape of the limiting strip 44 is limited to a right-angled triangular prism, and one of the right-angled surfaces of the limiting strip 44 is integrally formed on the inner side surface of the supporting vertical plate 42, and the other right-angled surface of the limiting strip 44 is flush with the bottom surface of the supporting vertical plate 42.

[0061] In order to facilitate the blasting of the fire extinguishing filler bag, the fire extinguishing filler bracket 4 is provided with a plurality of breakthrough holes 40. There are three ways to open the breakthrough holes 40: Figure 4 First, the breakthrough hole 40 is opened on the bracket cross plate 41; Figure 5, secondly, the breakthrough hole 40 is opened on a certain supporting vertical plate 42; Figure 6 Third, the breakthrough hole 40 is opened in the bracket horizontal plate 41 and the two supporting vertical plates 42.

[0062] refer to Figure 7 In order to further facilitate the blasting and extinguishing of the fire extinguishing filling pack, a plurality of serrated breakthrough notches 400 are provided on the lower surface of the supporting vertical plate 42 .

[0063] Three installation methods of fire extinguishing filler bracket 4: reference Figure 8 First, the fire extinguishing filler bracket 4 is arranged between the two electrodes of the lithium battery cell 2 in the lithium battery module, and the length direction of the fire extinguishing filler bracket 4 is consistent with the length direction of the lithium battery mounting shell 1, that is, the vertical projection of a single fire extinguishing filler bracket 4 is located between the two electrodes of the lithium battery cell 2; reference Fig. 9 , second, the fire extinguishing filler bracket 4 is arranged between the electrode of the lithium battery cell 2, the blasting hole and the upper part of the blasting hole of the lithium battery cell 2; reference Fig.10 Third, a single fire extinguishing filler bracket 4 is arranged between the two electrodes of a single lithium battery cell 2 in the lithium battery module, and the length direction of the fire extinguishing filler bracket 4 is consistent with the length direction of the lithium battery cell 2, that is, the vertical projection of the single fire extinguishing filler bracket 4 is located between the two electrodes of the single lithium battery cell 2. The bracket in the present application can facilitate the installation of the fire extinguishing filler package, and can improve the safety of the whole vehicle of the new energy vehicle when the fire extinguishing filler package is directional blasted in the direction of the battery pack. In addition, the bracket in the present application can reduce the wear of the fire extinguishing filler package caused by the vibration of the vehicle during driving, and improve the service life and stability of the fire extinguishing filler package.

[0064] refer to Figure 1The fire extinguishing filling package 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 silicone film. The design pressure of the outer film layer 51 is 1.5-2.5 times the saturated vapor pressure of the corresponding fire extinguishing agent at the highest temperature of the use scenario. The lithium battery in this application is used as a use scenario. The actual production and design of the lithium battery use scenario is limited to 130°C. The design maximum bearing pressure of the outer film layer 51 is preferably 1.5 times the saturated vapor pressure of the corresponding fire extinguishing agent. In the present application, the preferred lithium battery fire extinguishing agent is a mixture of perfluorohexanone and perfluorononene in a mass ratio of 19:1. When an accident occurs in the lithium battery, the temperature rises to 49°C, and the perfluorohexanone in the fire extinguishing agent begins to vaporize. The vaporized perfluorohexanone serves as a gas propellant to better atomize the perfluorononene in a liquid state. When the temperature of the lithium battery is greater than 110°C, the perfluorononene is rapidly vaporized with the assistance of perfluorohexanone. When the temperature exceeds 130°C, the saturated vapor pressure of the fire extinguishing agent is greater than the designed maximum bearing pressure of the outer film layer 51, so that the outer film layer 51 is directionally exploded in the direction of the breakthrough hole 40 and / or the breakthrough gap 400, and the vaporized lithium battery fire extinguishing agent quickly diffuses into the environment, achieving the effect of rapid fire extinguishing.

[0065] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A lithium battery prepared using a lithium battery fire extinguishing agent, characterized in that: The invention 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 bracket (4), and a fire extinguishing filler pack (5), wherein the lithium battery cells (2) are detachably connected to the lithium battery installation shell (1); adjacent lithium battery cells (2) are spaced apart from each other; the lithium battery installation top cover (3) is detachably connected to the top of the lithium battery installation shell (1), forming a placement cavity (10); the fire extinguishing filler bracket (4) is arranged between the top of the lithium battery cell (2) and the lithium battery installation top cover (3), and is located in the placement cavity (10); the fire extinguishing filler pack (5) is fixedly connected to the fire extinguishing filler bracket (4); The fire extinguishing filler support (4) comprises a support cross plate (41) and two support vertical plates (42), wherein one of the support vertical plates (42) is integrally formed on the lower surface of the support cross plate (41), and the side of the support vertical plate (42) is flush with the side of the support cross plate (41) in the length direction; the other support vertical plate (42) is integrally formed on the lower surface of the support cross plate (41), and the side of the support vertical plate (42) is flush with the side of the support cross plate (41) in the length direction; the two support vertical plates (42) are symmetrical about the perpendicular bisector plane of the support cross plate (41) along the length direction; the fire extinguishing filler support (4) is sealed at both ends, and the sealing method is to use an integrally formed vertical plate to seal or to use glue to seal; adjacent support vertical plates (42) and the support cross plate (41) form a filler placement groove (43) for fixing the fire extinguishing filler package; the bottom of the inner side surface of the support vertical plate (42) is formed with a limiting strip (44) along its own length direction for limiting the movement of the fire extinguishing filler package (5); The fire extinguishing filler support (4) is made of a poor conductor material, which is selected from HDPE, PVC, PA6, PA66, PP, aluminum or aluminum alloy with surface oxidation treatment; The fire extinguishing filling package (5) comprises an outer film layer (51) and a 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 silicone film; the design pressure of the outer film layer (51) is 1.5-2.5 times the saturated steam pressure of the corresponding fire extinguishing agent at the highest temperature of the use scene; when a lithium battery is used as the use scene, the actual production design of the lithium battery use scene The maximum temperature is limited to 130°C, and the design maximum bearing pressure of the outer film layer (51) is 1.5 times the saturated steam pressure of the corresponding fire extinguishing agent; It also includes a first silicone elastic pad (6) and a second silicone elastic pad (7), wherein the first silicone elastic pad (6) is arranged between the lithium battery mounting top cover (3) and the fire extinguishing filler bracket (4), and the first silicone elastic pad (6) is located in the mounting cavity (10); the second silicone elastic pad (7) is arranged between the lithium battery cell (2) and the fire extinguishing filler bracket (4); Lithium battery fire extinguishing agent is a mixture of perfluorohexanone and perfluorononene in a mass ratio of 19:1.

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