CN213941926U - Special fire prevention intelligence management and control system that puts out a fire of ternary lithium ion power battery case - Google Patents
Special fire prevention intelligence management and control system that puts out a fire of ternary lithium ion power battery case Download PDFInfo
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- CN213941926U CN213941926U CN202022029597.6U CN202022029597U CN213941926U CN 213941926 U CN213941926 U CN 213941926U CN 202022029597 U CN202022029597 U CN 202022029597U CN 213941926 U CN213941926 U CN 213941926U
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- fire
- lithium ion
- ternary lithium
- battery box
- extinguishing
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 76
- 230000002265 prevention Effects 0.000 title claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 14
- 239000003595 mist Substances 0.000 claims description 19
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000003670 easy-to-clean Effects 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 description 22
- 239000007789 gas Substances 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000004880 explosion Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model provides a special intelligent management and control system that prevents putting out a fire of ternary lithium ion power battery case, ternary lithium ion battery incasement top is provided with carbon monoxide measurement ware and the special combination shower nozzle of a plurality of, and every special combination shower nozzle includes superfine dry powder spout and thin water smoke spout, and superfine dry powder spout is connected with out the powder pipeline with ABC superfine dry powder fire extinguisher's play powder mouth, and the water outlet of thin water smoke spout and water base fire extinguisher is connected with outlet conduit, all is provided with the solenoid valve on outlet conduit and the outlet conduit. The utility model has the advantages that: the problem of thermal runaway of the lithium ion battery is effectively solved, a new way is provided for realizing early reliable detection and quick fire extinguishing of the ternary lithium ion battery fire, and the ternary lithium ion battery fire extinguishing device is easy to clean after fire extinguishing and cannot damage the environment.
Description
Technical Field
The utility model relates to a special intelligent management and control system of preventing putting out a fire of ternary lithium ion power battery case.
Background
Lithium ion batteries are widely used in various precision devices and electric vehicles due to the advantages of high working voltage, small volume, light weight, large energy density, no memory effect, no pollution, small self-discharge, long cycle life and the like, for electric vehicles, two types of lithium ion storage batteries are mainly used, namely ternary lithium batteries (which are used in many passenger vehicles) and lithium iron phosphate batteries (which are used in many passenger vehicles), and although lithium ion batteries have more advantages than other types of batteries, the internal resistance, capacity and the like of each battery unit can be different due to the limitation of the manufacturing process of the lithium ion batteries. When a plurality of battery units are used in series, the charge and discharge rates of the respective battery cells may be inconsistent, which results in a low utilization rate of the battery capacity. When the lithium ion battery is in a serious overcharge state or is subjected to external factors such as extrusion and needling, the danger of explosion exists, and the personal safety of a user is threatened while the lithium ion battery pack is damaged. Unlike ordinary solid or liquid fires, the initial stage of a lithium ion battery fire is mainly smoldering, the sign is not obvious, but once the heat accumulated by internal reaction reaches the thermal runaway starting temperature, intense combustion or explosion happens instantly (about 10 s), and even if the fire extinguishing agent is sprayed to extinguish the open fire, the internal continuous exothermic reaction can also cause re-combustion. The standard for judging thermal runaway is that the surface temperature of a battery reaches 100 ℃, a diaphragm is fused to cause short circuit of a positive electrode and a negative electrode, the highest heating rate reaches 220 ℃/min, the reaction is severe, and the battery is ignited to explode and burn. In 12 days 5 and 12 in 2020, the Ministry of industry and correspondence issues three mandatory laws and regulations, focuses on the electric automobile, enforces the mandatory regulations on the safety problems of the electric automobile, and has no margin for any business in terms of safety problems. Particularly, a thermal diffusion test of a battery system is added according to the standard, and after thermal runaway of a battery monomer occurs, the battery system does not ignite or explode within 5 minutes, so that safe escape time is reserved for passengers. From the existing products in the current market, the lithium iron phosphate battery preliminarily reaches the specification in a needling state, but the ternary lithium battery can not meet the requirement all the time. The method is described in the electric vehicle battery fire extinguishing guide specification as follows: once the lithium battery box is on fire, personnel should immediately evacuate the vehicle to a safe area, requiring large amounts of water to cool the battery and extinguish the fire. And the root of the fire source is in the battery box, and the fire extinguishing agent hardly penetrates through the battery box to effectively extinguish the fire, so that the fire extinguishing efficiency is low. In addition, no mature automatic fire extinguishing product for lithium ion battery fire exists at home and abroad. Units such as Shenyang fire-fighting research institute of public Security department, China Ship research institute, China civil aviation university and the like have been actively explored and researched for lithium ion battery fire prevention and control in sequence, progress is made in extinguishing the open fire of the lithium ion battery, but no good means is provided for controlling the reignition of the lithium ion battery. British Fire champion company develops lithium ion battery portable Fire extinguishers, and S-shaped aerosol Fire extinguishing agents are adopted, so that the risks of heat-linked reaction and explosion exist, and re-burning and thermal runaway propagation cannot be inhibited. Organizations such as the FM global company, the Civil Aviation Administration (CAA) in the united states, the german motor vehicle supervision association (DEKRA), and the like have also conducted special research on lithium ion battery fire prevention and control, but none of them has solved the problem of suppressing the reignition of the lithium ion battery.
Disclosure of Invention
For solving above not enough in the technique, the utility model provides a special intelligent management and control system of putting out a fire of preventing of ternary lithium ion power battery case effectively solves lithium ion battery thermal runaway problem, safe and reliable.
The utility model discloses a realize through following measure:
a special fire prevention and extinguishing intelligent management and control system for a ternary lithium ion power battery box comprises a fire prevention and extinguishing intelligent control module, an ABC superfine dry powder fire extinguisher, a water-based fire extinguisher and a ternary lithium ion battery box provided with a plurality of ternary lithium ion batteries, wherein a carbon monoxide detector and a plurality of special combined nozzles are arranged at the top in the ternary lithium ion battery box, each special combined nozzle comprises a superfine dry powder nozzle and a fine water mist nozzle, the superfine dry powder nozzle and a powder outlet of the ABC superfine dry powder fire extinguisher are connected with a powder outlet pipeline, the fine water mist nozzle and a water outlet of the water-based fire extinguisher are connected with a water outlet pipeline, electromagnetic valves are arranged on the water outlet pipeline and the powder outlet pipeline, a thermocouple is arranged on a binding post of each ternary lithium ion battery, and the thermocouple and the carbon monoxide detector are in signal connection with a signal input end of, the signal output end of the fire prevention and extinguishing intelligent control module is connected with the electromagnetic valve, and the bottom in the ternary lithium ion storage battery box is provided with the explosion-proof pressure relief valve.
The special combined nozzle comprises a base, wherein the superfine dry powder nozzle and the fine water mist nozzle are arranged on the same base, the superfine dry powder nozzle is in a conical shape with a narrow top and a wide bottom, and the fine water mist nozzle is internally provided with spiral atomizing teeth.
The side of the ternary lithium ion storage battery box is provided with a battery box charging port, positive and negative plugs of the battery box charging port are respectively connected with positive and negative binding posts of the ternary lithium ion storage battery through a power supply line positioned in the ternary lithium ion storage battery box, a power-off switch is arranged on the power supply line, and the power-off switch is in signal connection with a signal output end of the intelligent fire-fighting control module.
The fire prevention and extinguishing intelligent control module is provided with an acousto-optic alarm lamp, and the acousto-optic alarm lamp is in signal connection with the signal output end of the fire prevention and extinguishing intelligent control module.
The fire prevention and extinguishing intelligent control module is provided with a manual starting switch and an emergency stop button.
The utility model has the advantages that: the ABC superfine dry powder extinguishing agent rapidly extinguishes combustion flame, water forms water mist for rapid cooling after the water extinguishing agent is sprayed out, flammable and explosive gas released by thermal runaway of the lithium ion storage battery is neutralized by the two extinguishing agents, explosion risks caused by accumulation of a large amount of flammable and explosive gas are avoided, the whole set of extinguishing system can realize full-automatic control and manual control, the problem of thermal runaway of the lithium ion battery is effectively solved, a new way is provided for early reliable detection and rapid extinguishment of fire of the ternary lithium ion battery, and the extinguishing system is easy to clean after extinguishment and cannot cause damage to the environment.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the special combined nozzle of the present invention.
Wherein: the intelligent fire-extinguishing system comprises an intelligent fire-extinguishing control module 1, a ternary lithium ion storage battery box 2, a power-off switch 3, a battery box charging port 4, a special combined spray head 5, a carbon monoxide measuring device 6, a ternary lithium ion storage battery 7, an explosion-proof pressure release valve 8, a thermocouple 9, an ABC superfine dry powder fire extinguisher 10, an electromagnetic valve 11, a water-based fire extinguisher 12, a manual starting switch 13, an acousto-optic alarm lamp 14, an emergency stop button 15, a base 16, a superfine dry powder nozzle 17, a fine water mist nozzle 18 and spiral atomizing teeth 19.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1 and 2, the invention provides a special fire prevention and extinguishing intelligent management and control system for a ternary lithium ion battery box, which is specially used in the field of fire protection, and according to the conclusion obtained after experimental research on various fire extinguishing agents of lithium ion storage batteries in a scientific research institution: the cooling performance of the common fire extinguishing agent for the lithium ion storage battery is as follows: the water mist > foam > heptafluoropropane, the superfine dry powder extinguishing agent is the extinguishing agent with highest extinguishing efficiency at present, can effectively extinguish A, B, C, E, F type fire, can inhibit and weaken the occurrence of deflagration and detonation after the compressed gas is injected into combustible gas and combustible dust and is mixed with the combustible gas and the combustible dust, but has poor cooling effect. The water fire extinguishing agent is low in price and very easy to obtain, forms fine water mist after being sprayed out by a special spray head under high pressure, has obvious cooling effect but poor fire extinguishing efficiency, and can effectively combine the two fire extinguishing agents to reduce the harm degree of disaster accidents to the minimum.
The fire-extinguishing fire-fighting water-based fire extinguisher comprises a fire-extinguishing intelligent control module 1, an ABC superfine dry powder fire extinguisher 10, a water-based fire extinguisher 12 and a ternary lithium ion storage battery box 2 provided with a plurality of ternary lithium ion storage batteries, wherein a carbon monoxide detector 6 and a plurality of special combined nozzles 5 are arranged at the top in the ternary lithium ion storage battery box 2, each special combined nozzle 5 comprises a superfine dry powder nozzle 17 and a fine water mist nozzle 18, the superfine dry powder nozzles 17 and a powder outlet of the ABC superfine dry powder fire extinguisher 10 are connected with a powder outlet pipeline, the water outlet pipelines 18 and a water outlet of the water-based fire extinguisher 12 are connected with a water outlet pipeline, electromagnetic valves 11 are arranged on the water outlet pipeline and the powder outlet pipeline, a thermocouple 9 is arranged on a binding post of each ternary lithium ion storage battery, the thermocouple 9 and the carbon monoxide detector 6 are in signal connection with a signal input end of the fire-extinguishing intelligent control module 1, and a signal output end of the fire-extinguishing intelligent control module 1 is connected with the electromagnetic valve 11, an explosion-proof pressure relief valve 8 is arranged at the bottom in the ternary lithium ion storage battery box 2. The side of the ternary lithium ion storage battery box 2 is provided with a battery box charging port 4, positive and negative plugs of the battery box charging port 4 are respectively connected with positive and negative terminals of the ternary lithium ion storage battery through a power supply line positioned in the ternary lithium ion storage battery box 2, a power-off switch 3 is arranged on the power supply line, and the power-off switch 3 is in signal connection with a signal output end of the fire-fighting intelligent control module 1. The fire prevention and extinguishing intelligent control module 1 is provided with an acousto-optic alarm lamp 14, and the acousto-optic alarm lamp 14 is in signal connection with the signal output end of the fire prevention and extinguishing intelligent control module 1. The fire prevention and extinguishing intelligent control module 1 is provided with a manual starting switch 13 and an emergency stop button 15.
The special combined nozzle 5 comprises a base 16, an ultrafine dry powder nozzle 17 and a fine water mist nozzle 18 are arranged on the same base 16, the ultrafine dry powder nozzle 17 is in a conical shape with a narrow top and a wide bottom, and spiral atomizing teeth 19 are arranged in the fine water mist nozzle 18. The two fire extinguishing agents are separately arranged and do not influence each other, and can act together when combined and sprayed, the superfine dry powder fire extinguishing agent cuts off a combustion reaction chain to carry out chemical suppression fire extinguishing, and the high-pressure water fire extinguishing agent is further refined by the spiral refining teeth to form fine water mist to rapidly cool the battery box so as to prevent re-combustion.
The direct reflection of the thermal runaway of the lithium ion storage battery is the continuous rise of the temperature and the mass production of carbon monoxide, the temperature of each ternary lithium ion storage battery 7 is monitored by a thermocouple 9, a carbon monoxide tester 6 is arranged at multiple points above a storage battery box, when the temperature reaches 80 ℃ (the temperature can be set according to the melting temperature of a battery diaphragm) and the concentration of the carbon monoxide reaches 500ppm (the concentration index can be set), an acousto-optic alarm lamp 14 sends out acousto-optic alarm, an intelligent fire-extinguishing prevention control module 1 sends out an instruction, after time delay (the time delay can be set), a power-off switch 3 is turned off, an electromagnetic valve 11 acts, an ABC superfine dry powder fire extinguisher 10 and a water-based fire extinguisher 12 simultaneously carry out multi-point injection to the ternary lithium ion storage battery box 2 through a special combined spray head 5, the ABC fire extinguishing agent rapidly puts out burning flames, and the superfine dry powder is rapidly cooled after the water extinguishing agent is sprayed out, the two extinguishing agents neutralize inflammable and explosive gases released by thermal runaway of the lithium ion storage battery, explosion risks caused by accumulation of a large amount of inflammable and explosive gases are avoided, and when the pressure of the ternary lithium ion storage battery box 2 reaches the set pressure of the explosion-proof pressure release valve 8, the explosion-proof pressure release valve 8 is opened to release redundant gases. The whole set of fire extinguishing system can realize full-automatic control and manual control, effectively solves the problem of thermal runaway of the lithium ion battery, provides a new way for realizing early reliable detection and quick fire extinguishing of ternary lithium ion battery fires, is easy to clean after fire extinguishing, and cannot cause damage to the environment.
1. The full-automatic prevention and control principle is as follows:
when a certain ternary lithium ion storage battery is out of control thermally, the temperature of electrolyte rises, so that the temperature of the anode and the cathode of the battery rises, and a large amount of carbon monoxide gas is generated at the same time, when the temperature of the cathode of the battery reaches 80 ℃ (the temperature can be set according to the melting temperature of a battery diaphragm) and the concentration of the carbon monoxide reaches 500ppm (the concentration index can be set), a thermocouple 9 connected with the cathode of the battery outputs a signal to a system fire-proof and fire-extinguishing intelligent control module 1, an acousto-optic alarm lamp 14 gives out an acousto-optic alarm, after time delay (the time delay can be set), the fire-proof and fire-extinguishing intelligent control module 1 sends an instruction, a power-off switch 3 is switched off (if the thermal out of control of the battery is caused by charging, after the power-off switch 3 is switched off, charging is forced to be interrupted), an electromagnetic valve 11 is started, an ABC superfine dry powder fire extinguisher 10 and a water-based fire extinguisher 12 simultaneously spray to a ternary lithium ion storage battery box 2 through a special combined spray nozzle 5, combustion flame is rapidly extinguished by the ABC superfine dry powder extinguishing agent, the water mist is further scattered by the high-pressure water extinguishing agent through the water mist spiral atomizing teeth 19 in the special combined nozzle 5, the superfine water mist is rapidly cooled after being sprayed out, the inflammable and explosive gas released out of control by the thermal of the lithium ion storage battery can be diluted by the two extinguishing agents, the explosion risk caused by the accumulation of the inflammable and explosive gas in large quantity is avoided, and when the pressure of the ternary lithium ion storage battery box 2 reaches the set pressure of the explosion-proof pressure relief valve 8, the explosion-proof pressure relief valve 8 is opened, and redundant gas is released. During the alarm when the device activation time has not been reached, if the emergency stop button 15 is pressed, the command to activate the extinguishing agent is cancelled, and the power-off switch 3 can be reset.
2. Manual prevention and control principle:
when a certain ternary lithium ion storage battery is out of control thermally, a thermocouple 9 and a carbon monoxide detector 6 which are connected with the cathode of the battery simultaneously output signals to a system fire-proof and extinguishing intelligent control module 1, an acousto-optic alarm lamp 14 gives out acousto-optic alarm, a starting switch is pressed, the fire-proof and extinguishing intelligent control module 1 immediately gives out an instruction, a power-off switch 3 is turned off (if the thermal runaway of the battery is caused by charging, after the power-off switch 3 is turned off, charging is forcibly interrupted), an electromagnetic valve 11 is started, an ABC superfine dry powder fire extinguisher 10 and a water-based fire extinguisher 12 simultaneously spray to the ternary lithium ion storage battery box 2 through a special combined nozzle 5, and when the pressure of the ternary lithium ion storage battery box 2 reaches the set pressure of an explosion-proof pressure relief valve 8, the explosion-proof pressure relief valve 8 is opened, and redundant gas is released.
The foregoing is only a preferred embodiment of this patent, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of this patent, and these modifications and substitutions should also be regarded as the protection scope of this patent.
Claims (5)
1. The utility model provides a special intelligent management and control system that prevents putting out a fire of ternary lithium ion power battery case which characterized in that: the fire-extinguishing fire-fighting water-saving device comprises an intelligent fire-extinguishing control module, an ABC superfine dry powder fire extinguisher, a water-based fire extinguisher and a ternary lithium ion storage battery box provided with a plurality of ternary lithium ion storage batteries, wherein a carbon monoxide detector and a plurality of special combined nozzles are arranged at the top in the ternary lithium ion storage battery box, each special combined nozzle comprises a superfine dry powder nozzle and a fine water mist nozzle, the superfine dry powder nozzle and a powder outlet of the ABC superfine dry powder fire extinguisher are connected with a powder outlet pipeline, the fine water mist nozzle and a water outlet of the water-based fire extinguisher are connected with a water outlet pipeline, electromagnetic valves are arranged on the water outlet pipeline and the powder outlet pipeline, a thermocouple is arranged on a binding post of each ternary lithium ion storage battery, the thermocouple and the carbon monoxide detector are in signal connection with a signal input end of the intelligent, an explosion-proof pressure relief valve is arranged at the bottom in the ternary lithium ion storage battery box.
2. The special fire prevention and extinguishing intelligent management and control system for the ternary lithium-ion power battery box according to claim 1, characterized in that: the special combined nozzle comprises a base, the superfine dry powder nozzle and the fine water mist nozzle are arranged on the same base, the superfine dry powder nozzle is in a conical shape with a narrow top and a wide bottom, and spiral atomizing teeth are arranged in the fine water mist nozzle.
3. The special fire prevention and extinguishing intelligent management and control system for the ternary lithium-ion power battery box according to claim 1, characterized in that: the side of the ternary lithium ion storage battery box is provided with a battery box charging port, positive and negative plugs of the battery box charging port are respectively connected with positive and negative binding posts of the ternary lithium ion storage battery through a power supply line positioned in the ternary lithium ion storage battery box, a power-off switch is arranged on the power supply line, and the power-off switch is in signal connection with a signal output end of the intelligent fire-fighting control module.
4. The special fire prevention and extinguishing intelligent management and control system for the ternary lithium-ion power battery box according to claim 1, characterized in that: the intelligent fire prevention and extinguishment control module is provided with an acousto-optic alarm lamp, and the acousto-optic alarm lamp is in signal connection with the signal output end of the intelligent fire prevention and extinguishment control module.
5. The special fire prevention and extinguishing intelligent management and control system for the ternary lithium-ion power battery box according to claim 1, characterized in that: the fire prevention and extinguishing intelligent control module is provided with a manual starting switch and an emergency stop button.
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| CN202022029597.6U CN213941926U (en) | 2020-09-16 | 2020-09-16 | Special fire prevention intelligence management and control system that puts out a fire of ternary lithium ion power battery case |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377321A (en) * | 2021-12-14 | 2022-04-22 | 深圳供电局有限公司 | Fire fighting method for battery pack, fire fighting device for battery pack and energy storage equipment |
| CN114397853A (en) * | 2022-01-20 | 2022-04-26 | 航天科工哈尔滨风华有限公司电站设备分公司 | Safety device with intelligent holographic function |
-
2020
- 2020-09-16 CN CN202022029597.6U patent/CN213941926U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114377321A (en) * | 2021-12-14 | 2022-04-22 | 深圳供电局有限公司 | Fire fighting method for battery pack, fire fighting device for battery pack and energy storage equipment |
| CN114397853A (en) * | 2022-01-20 | 2022-04-26 | 航天科工哈尔滨风华有限公司电站设备分公司 | Safety device with intelligent holographic function |
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