CN114344774A - Perfluoro hexanone fire extinguishing method shared by lithium battery electric box and energy storage cabin - Google Patents
Perfluoro hexanone fire extinguishing method shared by lithium battery electric box and energy storage cabin Download PDFInfo
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- CN114344774A CN114344774A CN202210145831.2A CN202210145831A CN114344774A CN 114344774 A CN114344774 A CN 114344774A CN 202210145831 A CN202210145831 A CN 202210145831A CN 114344774 A CN114344774 A CN 114344774A
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Abstract
The invention provides a perfluorohexanone fire extinguishing method shared by a lithium battery box and an energy storage cabin, which comprises the following steps: step S1, when in use, the heat-sensitive release device is arranged in the lithium battery electronic box, and when the internal temperature of the lithium battery electronic box reaches the set value of the heat-sensitive release device, the heat-sensitive release device is broken; step S2, starting a liquid pump and a three-way valve, wherein the liquid pump pumps the perfluorohexanone fire-extinguishing liquid in the liquid storage tank to the main infusion pipe; step S3, injecting the perfluorohexanone fire extinguishing liquid in the second infusion branch pipe into the lithium battery electronic box through the liquid outlet pipe, so as to realize the fire extinguishing operation inside the lithium battery electronic box; step S4, when the whole energy storage battery compartment is in fire, the liquid pump pumps the liquid in the liquid storage tank to the pipeline through the three-way valve, wherein the liquid has the functions of isolating oxygen and continuously cooling; the invention can realize internal fire extinguishing of the lithium battery electric box when the lithium battery electric box is out of thermal control, and can also realize internal fire extinguishing of the energy storage cabin when the energy storage battery cabin is in fire.
Description
Technical Field
The invention relates to the technical field of battery thermal runaway inhibition, in particular to a perfluorohexanone fire extinguishing method shared by a lithium battery electric box and an energy storage cabin.
Background
In recent years, electrochemical energy storage is rapidly developed, wherein the accumulated installed scale of a lithium ion battery is the largest and accounts for more than 90% of the electrochemical energy storage, and the development prospect of energy storage is very wide along with the coming of a double-carbon policy and the increasing of the proportion of new energy. Compared with the development prospect, the electrochemical energy storage related standard is not perfect, the energy storage integrated products are irregular, the power station fire accident happens sometimes, and a layer of shadow is covered on the development of the energy storage industry.
At present, most of traditional fire-fighting schemes adopt an energy storage (cabin) room level fire-fighting scheme, and a pipe network type heptafluoropropane fire-extinguishing system (HFC-227ea) is used as a fixed fire-extinguishing device of an energy storage (cabin) room level, so that the following problems exist:
1) when the lithium ion battery is subjected to thermal runaway combustion, oxygen and volatile liquid are released, and the lithium ion battery can still burn even in the absence of air. The traditional fire-fighting scheme does not reach the level of a pack electric box, the fire-extinguishing agent can not be accurately released to the electric box battery, the fire can be quickly extinguished, the long-acting cooling function is kept, and the traditional fire-fighting scheme is poor in accuracy and effectiveness aiming at the special combustion characteristic of the lithium ion battery;
2) a large number of experiments prove that the heptafluoropropane has weak performance in preventing the lithium ion battery from reburning;
3) cabin level fire control adopts passive protection, and the fire early warning often only can play a role after flue gas and temperature have spread to the cabin, can't realize effective linkage with operational parameters such as battery management system.
The problems greatly influence the large-area application and popularization of lithium ion electrochemical energy storage.
Disclosure of Invention
In view of the above, the present invention provides a method for extinguishing fire inside a lithium battery electrical box when the lithium battery electrical box is out of thermal control, and also for extinguishing fire inside an energy storage cabin when the energy storage battery cabin is in fire.
The invention is realized by adopting the following method: a perfluorohexanone fire extinguishing method shared by a lithium battery electric box and an energy storage cabin body comprises the following steps:
step S1, when in use, the heat-sensitive release device is arranged in the lithium battery electric box, and when the internal temperature of the lithium battery electric box reaches the set value of the heat-sensitive release device, the heat-sensitive glass bubbles in the heat-sensitive release device are broken;
step S2, starting a liquid pump and a three-way valve, wherein the liquid pump pumps the perfluorohexanone fire-extinguishing liquid in the liquid storage tank to a main infusion pipe, and then the perfluorohexanone fire-extinguishing liquid in the main infusion pipe is conveyed to a first sub-infusion pipe and then conveyed to a second sub-infusion pipe through the first sub-infusion pipe under the action of the three-way valve;
step S3, injecting the perfluorohexanone fire extinguishing liquid in the second infusion branch pipe into the lithium battery electric box through the liquid outlet pipe, so that fire extinguishing operation inside the lithium battery electric box is realized, and the effects of oxygen isolation and continuous cooling are achieved;
step S4, when the whole energy storage battery compartment is in fire, the liquid pump pumps the liquid in the liquid storage tank to the pipeline through the three-way valve, the atomizer is opened, and the perfluorohexanone fire extinguishing liquid is atomized and sprayed to the energy storage battery compartment by the atomizer, so that the whole energy storage battery compartment is extinguished.
The device comprises a liquid storage tank for storing perfluorohexanone fire-extinguishing liquid, wherein the liquid storage tank is arranged in an energy storage battery compartment, a plurality of rows of lithium battery electronic boxes are arranged in the energy storage battery compartment, a liquid suction pump is arranged at a liquid outlet of the liquid storage tank, an infusion main pipe is connected to the liquid suction pump, a plurality of first infusion branch pipes are connected to the infusion main pipe, the first infusion branch pipes are perpendicular to the infusion main pipe, a plurality of second infusion branch pipes matched with the lithium battery electronic boxes are arranged on the first infusion branch pipes at equal intervals, and a thermosensitive release device for injecting the perfluorohexanone fire-extinguishing liquid into the lithium battery electronic boxes is arranged at a liquid outlet end of each second infusion branch pipe; and a fire extinguishing mechanism for extinguishing the fire in the energy storage battery cabin is arranged in the energy storage battery cabin.
Further, the heat-sensitive release device includes the drain pipe, the UNICOM on the drain pipe be provided with the second infusion divides the connecting pipe that the pipe is connected, be provided with the spring in the drain pipe, the connection of drain pipe right side is provided with the mount pad, the installation is provided with the temperature sensing glass bubble on the mount pad, just the mount pad embedding set up in the lithium cell electronic box, the left side of drain pipe is connected with the stop valve, just the stop valve with spring one end is connected, the stop valve with the liquid outlet department of connecting pipe cooperatees.
Further, the mechanism of putting out a fire includes the three-way valve, the three-way valve sets up on the infusion is responsible for, energy storage battery under-deck upper surface equidistance is provided with a plurality of atomizer, just atomizer through the pipeline with three-way valve connection sets up, the pipeline embedding in the energy storage battery under-deck upper wall, fire detector is installed through the installed part in the middle part of the energy storage battery under-deck upper surface.
Further, the installed part includes the collar, first spacing groove has all been seted up at both ends about the collar inner wall, fire detector surface about both ends all seted up with first spacing groove matched with second spacing groove, the bar opening has all been seted up at both ends about the fire detector upper surface, just the bar opening with the second spacing groove is linked together, be provided with the flexible piece that is used for imbedding first spacing inslot in the second spacing groove, flexible piece upper surface is provided with and is used for driving the flexible piece stretches out and the tensile piece of shrink, just tensile piece with the flexible piece sets up perpendicularly, be provided with reset spring in the bar opening, reset spring one end with tensile piece is fixed, just tensile piece set up in the bar opening.
The invention has the beneficial effects that: according to the invention, through the action of the liquid storage tank, the liquid pump, the infusion main pipe and the thermosensitive release device, when the temperature in the lithium battery electric box rises to a certain value, the liquid pump can pump the perfluorohexanone fire-extinguishing liquid in the liquid storage tank into the infusion main pipe, and then the perfluorohexanone fire-extinguishing liquid is soaked into the lithium battery electric box through the thermosensitive release device, so that the open fire can be quickly extinguished, the lithium battery electric box is completely immersed in the perfluorohexanone fire-extinguishing agent, the effects of isolating oxygen and continuously cooling are achieved, the battery is effectively prevented from re-burning, and through the action of the three-way valve, the pipeline and the atomization nozzle, the perfluorohexanone fire-extinguishing agent can be sprayed out through the atomization nozzle when the energy storage battery compartment fires, so that the overall fire extinguishing of the energy storage battery compartment is realized; the fire extinguishing device is simple in structure and convenient and fast to operate, and can realize the fire extinguishing function when the lithium battery box is out of control due to heat.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural view of the thermosensitive releasing device.
Fig. 4 is a schematic view of the internal structure of the heat-sensitive release device.
Fig. 5 is a schematic structural view of the mounting member.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a perfluorohexanone fire extinguishing method for a common electrical box and an energy storage cabin of a lithium battery in the invention includes the following steps:
step S1, when the temperature-sensitive releasing device is used, the temperature-sensitive releasing device is installed in the lithium battery electric box, when the temperature in the lithium battery electric box reaches a set value of the temperature-sensitive releasing device, the temperature-sensitive releasing device is broken, and the set value is 93 +/-4 ℃.
Step S2, starting a liquid pump and a three-way valve, wherein the liquid pump pumps the perfluorohexanone fire-extinguishing liquid in the liquid storage tank to a main infusion pipe, and then the perfluorohexanone fire-extinguishing liquid in the main infusion pipe is conveyed to a first sub-infusion pipe and then conveyed to a second sub-infusion pipe through the first sub-infusion pipe under the action of the three-way valve;
step S3, injecting the perfluorohexanone fire extinguishing liquid in the second infusion branch pipe into the lithium battery electric box through the liquid outlet pipe, so that fire extinguishing operation inside the lithium battery electric box is realized, and the effects of oxygen isolation and continuous cooling are achieved;
step S4, when the whole energy storage battery compartment is in fire, the liquid pump pumps the liquid in the liquid storage tank to the pipeline through the three-way valve, the atomizer is opened, and the perfluorohexanone fire extinguishing liquid is atomized and sprayed to the energy storage battery compartment by the atomizer, so that the whole energy storage battery compartment is extinguished.
The temperature-sensitive glass bubbles are only sensitive to heat (temperature) in the lithium battery box, when the lithium battery in the lithium battery box is out of control due to heat, the temperature rises, the temperature-sensitive glass bubbles rapidly expand and break, the stop valve is popped out through the spring, and the fire-fighting main machine is linked, so that the fire-fighting agent can be rapidly filled in the lithium battery box within 10 seconds, the fire-fighting effect is excellent, and the accuracy and the effectiveness are high.
Referring to fig. 2 to 4, the present invention provides an embodiment, including a liquid storage tank 1 for storing a perfluorohexanone fire-extinguishing liquid, wherein the liquid storage tank 1 is disposed in an energy storage battery compartment 2, a plurality of rows of lithium battery electronic boxes 3 are disposed in the energy storage battery compartment 2, a liquid suction pump 4 is disposed at a liquid outlet of the liquid storage tank 1, a main infusion pipe 5 is connected to the liquid suction pump 4, a plurality of first sub-infusion pipes 6 are connected to the main infusion pipe 5, the first sub-infusion pipes 6 are disposed perpendicular to the main infusion pipes 5, a plurality of second sub-infusion pipes 7 matched with the lithium battery electronic boxes 3 are disposed at equal intervals on the first sub-infusion pipes 6, and a heat-sensitive release device 8 for injecting the perfluorohexanone fire-extinguishing liquid into the lithium battery electronic boxes 3 is disposed at a liquid outlet end of the second sub-infusion pipes 7; and a fire extinguishing mechanism 10 for extinguishing fire in the energy storage battery cabin 2 is arranged in the energy storage battery cabin 2. Make when 3 take place thermal runaway at lithium battery electronic box, open drawing liquid pump 4, the perfluor hexanone fire extinguishing fluid pump-out in the drawing liquid pump 4 is responsible for 5 to the infusion, the infusion is responsible for 5 and is carried perfluor hexanone fire extinguishing fluid to first infusion and be in charge of 6 and second infusion and be in charge of 7, perfluor hexanone fire extinguishing fluid in the second infusion is in charge of 7 gets into heat-sensitive release device 8, pour into perfluor hexanone fire extinguishing fluid into lithium battery electronic box 3 through heat-sensitive release device 8 in, the operation of putting out a fire to it, play the effect that separates oxygen and continuously cool down.
With reference to fig. 3 and 4, in an embodiment of the present invention, the thermal release device 8 includes a liquid outlet pipe 81, a connecting pipe 82 connected to the second infusion branch pipe 7 is disposed on the liquid outlet pipe 81 in a communicating manner, a spring 83 is disposed in the liquid outlet pipe 81, a mounting seat 84 is disposed on the right side of the liquid outlet pipe 81 in a connecting manner, a thermal glass bulb 85 is mounted on the mounting seat 84, the mounting seat 84 is embedded in the lithium battery box 3, a stop valve 86 is connected to the left side of the liquid outlet pipe 81, the stop valve 86 is connected to one end of the spring 83, and the stop valve 86 is matched with a liquid outlet of the connecting pipe 82. Under normal conditions, spring 83 is in the compressed state for when the temperature in lithium battery electronic box 3 reaches the rupture value of temperature sensing glass bubble 85, temperature sensing glass bubble 85 breaks, and the effort acts on spring 83, and spring 83 resets and makes stop valve 86 pop out, thereby opens the liquid outlet of connecting pipe 82, is convenient for perfluorohexanone fire-extinguishing fluid to pour into in lithium battery electronic box 3.
Referring to fig. 2, in an embodiment of the present invention, the fire extinguishing mechanism 10 includes a three-way valve 20, the three-way valve 20 is disposed on the main infusion pipe 5, a plurality of atomizing nozzles 21 are equidistantly disposed on an upper surface of the energy storage battery compartment 2, the atomizing nozzles 21 are connected to the three-way valve 20 through a pipe 30, the pipe 30 is embedded into an upper wall of the energy storage battery compartment 2, and a fire detector 22 is disposed in a middle portion of the upper surface of the energy storage battery compartment 2 through a mounting member 9. When the energy storage battery cabin 2 is on fire, the perfluorohexanone fire extinguishing liquid in the liquid storage tank 1 is pumped to the pipeline 30 through the liquid pump 4 by opening the three-way valve 20 and the liquid pump 4, and is atomized and sprayed out through the atomizer 21, so that the whole fire extinguishing in the energy storage battery cabin 2 is realized.
The three-way valve 20 is controlled by a fire control host to realize path switching, different requirements of lithium battery electric box level fire fighting and cabin level fire fighting on fire extinguishing agent forms are realized through different switching paths and different power of a liquid pump, and the lithium battery electric box level fire fighting and the energy storage battery cabin level fire fighting in the energy storage battery cabin share one set of fire extinguishing device.
With continued reference to fig. 2 and 5, in an embodiment of the present invention, the mounting member 9 includes a mounting ring 91, first limiting grooves 92 are respectively formed at left and right ends of an inner side wall of the mounting ring 91, second limiting grooves (not shown) matched with the first limiting grooves 92 are respectively formed at left and right ends of an outer surface of the fire detector 22, strip-shaped openings 93 are respectively formed at left and right ends of an upper surface of the fire detector 22, the strip-shaped openings 93 are communicated with the second limiting grooves, a telescopic block 94 embedded in the first limiting grooves 92 is disposed in the second limiting grooves, a stretching block 95 for driving the telescopic block 94 to extend and contract is disposed on an upper surface of the telescopic block 94, the stretching block 95 is disposed perpendicular to the telescopic block 94, a return spring 96 is disposed in the strip-shaped openings 93, and one end of the return spring 96 is fixed to the stretching block 95, and the stretching block 95 is disposed in the strip opening 93. So that fix collar 91 in energy storage battery compartment 2, then through pulling tensile piece 95, make reset spring 96 compress, flexible piece 94 contracts to the second spacing inslot, then with fire detector 22 embedding collar 91 in, unclamp tensile piece 95, because reset spring 96's reset action, flexible piece 94 pops out and imbeds to first spacing inslot 92 to realize fire detector 22's fixing.
The heat-sensitive glass bulb, the liquid pump, the atomizer, the fire detector, the lithium battery electric box and the stop valve are all in the prior art, and can be clearly understood by those skilled in the art, and are not described in detail herein.
The perfluorohexanone is an important substitute of a halon fire extinguishing agent, is a fluorinated ketone compound, is a clear, colorless and tasteless liquid, and is stored in a storage device as the fire extinguishing agent. Perfluorohexanone is a liquid at ambient temperature, since it evaporates only 1/25 times as much as water and has a vapor pressure 25 times that of water, these properties make it easy to vaporize and exist in a gaseous state, which relies primarily on heat absorption to achieve the fire extinguishing effect. In the aspect of environmental protection, it is a genuine green environmental protection fire extinguishing agent. The extinguishing concentration of the perfluorohexanone is 4-6%, the safety margin is high, and the perfluorohexanone is safer for human bodies when in use. The mechanism is mainly physical inhibition.
It is worth mentioning that the invention can better realize the fire extinguishing of the lithium battery by distinguishing the fire extinguishing of the lithium battery electric box and the integral fire extinguishing of the energy storage battery compartment, and can be divided into three conditions:
single-battery PACK fire extinguishing protection
A fire extinguishing mode that perfluorohexanone liquid is fully immersed is adopted for a single battery PACK, and a fire extinguishing device is triggered to start through a thermosensitive glass bubble for automatic fire extinguishing in a thermosensitive terminal releasing device.
Multi-battery PACK fire extinguishing protection
Adopt the fire extinguishing mode of full submergence of perfluor hexanone liquid to a plurality of battery PACKs, trigger extinguishing device through the automatic for fire extinguishing in every battery PACK heat-sensitive terminal release and start with heat-sensitive glass bubble, by fire extinguishing controller control fire extinguishing agent release time, number of times, the system possesses and provides protect function for a plurality of PACKs.
Cabin-level fire extinguishing protection
The method adopts a perfluorohexanone gas total flooding mode, namely, in a specified time, a cabin-level fire alarm controller triggers a fire extinguishing device to start, and sprays a fire extinguishing agent with a certain concentration to a cabin-level protection area to uniformly fill the whole protection area, so that a fire disaster occurring at any part in the area can be extinguished.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (5)
1. A perfluoro hexanone fire extinguishing method shared by a lithium battery electric box and an energy storage cabin body is characterized by comprising the following steps:
step S1, when in use, the heat-sensitive release device is arranged in the lithium battery electric box, and when the internal temperature of the lithium battery electric box reaches the set value of the heat-sensitive release device, the heat-sensitive glass bubbles in the heat-sensitive release device are broken;
step S2, starting a liquid pump and a three-way valve, wherein the liquid pump pumps the perfluorohexanone fire-extinguishing liquid in the liquid storage tank to a main infusion pipe, and then the perfluorohexanone fire-extinguishing liquid in the main infusion pipe is conveyed to a first sub-infusion pipe and then conveyed to a second sub-infusion pipe through the first sub-infusion pipe under the action of the three-way valve;
step S3, injecting the perfluorohexanone fire extinguishing liquid in the second infusion branch pipe into the lithium battery electric box through the liquid outlet pipe, so that fire extinguishing operation inside the lithium battery electric box is realized, and the effects of oxygen isolation and continuous cooling are achieved;
step S4, when the whole energy storage battery compartment is in fire, the liquid pump pumps the liquid in the liquid storage tank to the pipeline through the three-way valve, the atomizer is opened, and the perfluorohexanone fire extinguishing liquid is atomized and sprayed to the energy storage battery compartment by the atomizer, so that the whole energy storage battery compartment is extinguished.
2. The fire extinguishing method for the perfluoro hexanone shared by the electric box and the energy storage cabin of the lithium battery as claimed in claim 1, which is characterized in that: the device comprises a liquid storage tank for storing perfluorohexanone fire-extinguishing liquid, wherein the liquid storage tank is arranged in an energy storage battery cabin, a plurality of rows of lithium battery electronic boxes are arranged in the energy storage battery cabin, a liquid suction pump is arranged at a liquid outlet of the liquid storage tank, an infusion main pipe is connected onto the liquid suction pump, a plurality of first infusion branch pipes are connected onto the infusion main pipe and are vertically arranged with the infusion main pipe, a plurality of second infusion branch pipes matched with the lithium battery electronic boxes are equidistantly arranged on the first infusion branch pipes, and a thermosensitive release device for injecting the perfluorohexanone fire-extinguishing liquid into the lithium battery electronic boxes is arranged at a liquid outlet end of each second infusion branch pipe; and a fire extinguishing mechanism for extinguishing the fire in the energy storage battery cabin is arranged in the energy storage battery cabin.
3. The fire extinguishing method for the perfluoro hexanone shared by the electric box and the energy storage cabin of the lithium battery as claimed in claim 2, characterized in that: thermosensitive release device includes the drain pipe, the UNICOM on the drain pipe be provided with the second infusion divides the connecting pipe that the pipe is connected, be provided with the spring in the drain pipe, the connection of drain pipe right side is provided with the mount pad, the installation is provided with the temperature sensing glass bubble on the mount pad, just the mount pad embedding set up in the lithium cell electronic box, the left side of drain pipe is connected with the stop valve, just the stop valve with spring one end is connected, the stop valve with the liquid outlet department of connecting pipe cooperatees.
4. The fire extinguishing method for the perfluoro hexanone shared by the electric box and the energy storage cabin of the lithium battery as claimed in claim 2, characterized in that: fire extinguishing mechanism includes the three-way valve, the three-way valve sets up on the infusion is responsible for, energy storage battery under-deck upper surface equidistance is provided with a plurality of atomizer, just atomizer through the pipeline with three way connection sets up, the pipeline embedding in the energy storage battery under-deck upper wall, fire detector is installed through the installed part in the middle part of the energy storage battery under-deck upper surface.
5. The fire extinguishing method for the perfluoro hexanone shared by the electric box and the energy storage cabin of the lithium battery as claimed in claim 4, wherein the fire extinguishing method comprises the following steps: the installed part includes the collar, first spacing groove has all been seted up at both ends about the collar inner wall, fire detector surface about both ends all seted up with first spacing groove matched with second spacing groove, the bar opening has all been seted up at both ends about the fire detector upper surface, just the bar opening with the second spacing groove is linked together, be provided with the flexible piece that is used for imbedding first spacing inslot in the second spacing groove, flexible piece upper surface is provided with and is used for driving the flexible piece stretches out and the tensile piece of shrink, just the tensile piece with the flexible piece sets up perpendicularly, be provided with reset spring in the bar opening, reset spring one end with the tensile piece is fixed, just the tensile piece set up in the bar opening.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210145831.2A CN114344774B (en) | 2022-02-17 | 2022-02-17 | Perfluoro hexanone fire extinguishing method shared by lithium battery electric box and energy storage cabin |
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| CN202210145831.2A CN114344774B (en) | 2022-02-17 | 2022-02-17 | Perfluoro hexanone fire extinguishing method shared by lithium battery electric box and energy storage cabin |
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| CN214372534U (en) * | 2021-02-05 | 2021-10-08 | 武汉奥博奥科技有限公司 | High temperature resistant phase sensor |
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2022
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| US20190334146A1 (en) * | 2016-12-30 | 2019-10-31 | Byd Company Limited | Protection device for battery, battery, battery pack, and vehicle |
| CN206950515U (en) * | 2017-06-26 | 2018-02-02 | 宋玉龙 | A kind of fire extinguisher automatic rotary shower nozzle |
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| CN110566911A (en) * | 2019-10-20 | 2019-12-13 | 泉州市科茂利通智能科技有限公司 | LED lamp clamping and mounting structure |
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