CN116570861A - Fire extinguishing device, system and method for battery pack - Google Patents
Fire extinguishing device, system and method for battery pack Download PDFInfo
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- CN116570861A CN116570861A CN202310571486.3A CN202310571486A CN116570861A CN 116570861 A CN116570861 A CN 116570861A CN 202310571486 A CN202310571486 A CN 202310571486A CN 116570861 A CN116570861 A CN 116570861A
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- gas
- battery
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 79
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 36
- 239000007921 spray Substances 0.000 claims description 35
- 239000000443 aerosol Substances 0.000 claims description 18
- 238000004880 explosion Methods 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 abstract description 23
- 238000001514 detection method Methods 0.000 abstract description 13
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 14
- 238000013461 design Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000011897 real-time detection Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000012983 electrochemical energy storage Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application relates to the technical field of energy storage, in particular to a fire extinguishing device of a battery pack, which comprises a smoke sensor positioned in a battery pack box body and an explosion-proof pressure release valve positioned on the battery pack box body, wherein the smoke sensor and the explosion-proof pressure release valve are close to each other and are opposite to each other; the application also relates to a fire extinguishing system of the battery pack, which comprises the fire extinguishing device of the battery pack, a temperature sensor, a VOC detector and a controller, wherein the temperature sensor and the VOC detector are arranged in the battery pack box, the controller is arranged outside the battery pack box and is used for controlling to perform early warning or starting a multi-stage fire extinguishing mode to perform fire extinguishing and cooling according to detection signals of the smoke sensor, the temperature sensor and the VOC detector; the application also discloses a fire extinguishing method of the fire extinguishing system based on the battery pack. The application has the advantages of reliable and stable detection of smoke concentration and gas components, more timely detection when the battery pack is abnormal, and safe and efficient use.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to a fire extinguishing device, a fire extinguishing system and a fire extinguishing method for a battery pack.
Background
The battery module comprises a plurality of single batteries, the battery modules are assembled to form a battery pack, the battery packs are assembled to form an energy storage container, and the energy storage containers are matched with an energy storage management system to form an energy storage power station. With the rapid development of energy storage technology, electrochemical energy storage is increasingly widely applied, and the current application of the electrochemical energy storage comprises an energy storage battery pack on a new energy automobile, an energy storage container or an energy storage power station of a large-scale market, a factory or a district, however, the following energy storage safety problem is also more and more emphasized, wherein the fire protection technology of the battery pack is an important link of the design and production of the battery pack. At present, the defects in the aspect of fire control design of the battery pack are as follows:
disclosure of Invention
The application aims to provide a fire extinguishing device of a battery pack, so as to achieve the effects of more reliable and stable detection of smoke concentration and gas components and more timely detection when the battery pack is abnormal.
The utility model provides a fire extinguishing device of battery package, includes the smoke transducer that is located the battery package box and is located the explosion-proof relief valve on the battery package box, smoke transducer with explosion-proof relief valve is close to each other and just to setting up.
The application has the beneficial effects that: the explosion-proof pressure release valve is arranged on the battery pack box body, when the battery pack is in a normal working state, gas in the battery pack box body flows to the outside through the explosion-proof pressure release valve, and the smoke sensor is close to the explosion-proof pressure release valve and faces the explosion-proof pressure release valve, so that the smoke sensor is just positioned on a flow path of the gas in the battery pack box body flowing to the explosion-proof pressure release valve, and the gas has certain fluidity, so that compared with other positions in the battery pack box body, the real-time detection of the smoke sensor can be ensured to be more reliable and stable, and the condition of the concentration and the components of the gas in the battery pack box body can be integrally reflected; when the abnormality occurs in the battery pack box body, the gas is rapidly increased, so that a large amount of gas is leaked through the explosion-proof pressure release valve, in the process, the smoke sensor is close to the explosion-proof pressure release valve and is designed to be opposite to the explosion-proof pressure release valve, so that the increase of the gas concentration and the change of the gas composition can be timely detected, countermeasures are timely taken to avoid the aggravation of abnormal conditions, and the design has the effect of timely and efficient detection.
The preferred embodiment of the application is as follows: the battery pack is characterized by further comprising an aerosol fire extinguisher which is arranged in the battery pack box body and is close to the smoke sensor, wherein a fire-fighting support is arranged in the battery pack box body, the smoke sensor is detachably mounted on the fire-fighting support, and the fire-fighting support is detachably mounted on the battery core end plate.
The beneficial effects are that: according to the scheme, the aerosol fire extinguisher arranged in the battery pack box body is used for automatically extinguishing fire when abnormality occurs in the battery pack box body, such as open fire; the smoke sensor is detachably arranged on the fire-fighting support, the detachable structural design is more convenient to maintain and replace, and because the smoke sensor is close to and just faces the explosion-proof pressure release valve, and the aerosol fire extinguisher is close to the smoke sensor and is arranged, the aerosol fire extinguisher is also close to the explosion-proof pressure release valve, and the design has the advantages that when the aerosol fire extinguisher is started to extinguish fire, a large amount of gas (particularly combustible gas) accumulated near the explosion-proof pressure release valve can be directly sprayed, so that a better fire extinguishing effect is achieved.
The preferred embodiment of the application is as follows: still include the linking bridge of L type, it has first screw hole to open on the horizontal stabilizer blade of linking bridge, and open there is the second screw hole battery core end plate up end, at first screw hole and second screw hole internal thread connecting bolt be equipped with horizontal first spliced pole on the vertical stabilizer blade of linking bridge, open on the upper portion of fire control support has the bar hole of joint on first spliced pole.
The beneficial effects are that: through setting up the linking bridge and at first screw hole and second screw hole internal thread connecting bolt to can realize the detachable connection of linking bridge and electric core end plate, convenient equipment and dismantlement, the design of the first spliced pole cooperation joint that sets up on through bar hole and the linking bridge, during the equipment, directly will install the fire control support card of smoke transducer and aerosol fire extinguisher and go into the spliced pole and can realize the fast-assembling, and the design in bar hole, but after the card goes into the spliced pole, the position of fire control support carries out the self-adaptation as required.
The preferred embodiment of the application is as follows: the fire-fighting support is located at the smoke sensor and the aerosol fire extinguisher and is hollow, and through holes which can be opposite to the hollow positions are formed in the end plates of the battery cells.
The beneficial effects are that: 1. in the scheme, the fire-fighting support is positioned at the smoke sensor and the aerosol fire extinguisher and is provided with the through holes corresponding to the hollow parts, so that the weight of the whole fire-fighting support and the whole electricity core end plate is reduced, and the fire-fighting support is more convenient to transport, install and detach; 2. on the other hand, when the inside normal state that is in of battery package box, whole fire control support is located horizontal position and is made the fretwork place just to or be located the position and make the fretwork place just to with the via hole, so neither influence the normal detection of smoke transducer, can not make the inside excessive exposure of electric core and lead to dustproof, the waterproof effect receives the influence, take place unusual when electric core inside, if thermal runaway, inside gas increases sharply, when a large amount of gas flows to the via hole of electric core end plate department through electric core inside, when the fire control support fretwork is passed through to the via hole again, because fire control support passes through the cooperation of bar hole and the first spliced pole of linking bridge, belong to the floating connected mode that horizontal position is adjustable, consequently, the very big gas that increases sharply can force whole fire control support to produce micro lateral shifting, thereby make the fretwork place of fire control support just to be bigger with the area of the via hole of electric core end plate, make each electric core inside and form direct gas flow channel between explosion transducer and the explosion-proof valve, can shorten the gas flow path in a large amount through electric core inside and the via hole of electric core end plate, can shorten gas flow path in time, the gas flow to the fire control transducer is higher in time and the explosion-proof valve is also passed through to the explosion-proof valve, and the fire control valve is high-proof, and the fire control device is high-proof.
The preferred embodiment of the application is as follows: the anti-explosion device is characterized by further comprising a gas-liquid two-phase spray head which is arranged on the battery pack box body and the spray nozzle faces the inner side of the battery box body, and the gas-liquid two-phase spray head is positioned right above the anti-explosion pressure release valve.
The beneficial effects are that: the application is further provided with the gas-liquid two-phase spray head, when the battery pack box body is in a thermal runaway state and generates open fire, and the open fire is in an spreading state, the problem that fire cannot be controlled can be solved by adopting the aerosol fire extinguisher alone, so that the fire extinguishing agent can be further automatically controlled to be sprayed by the gas-liquid two-phase spray head for extinguishing fire, and the gas-liquid two-phase spray head has a fire extinguishing effect on one hand and a cooling effect on the other hand after the whole battery pack box body is filled with the vaporous fire extinguishing agent sprayed by the gas-liquid two-phase spray head, and because a large amount of gas is concentrated at the explosion-proof pressure relief valve, a large amount of accumulated gas (particularly combustible gas) is sprayed by the gas-liquid two-phase spray head in a concentrated way, so that the fire extinguishing effect is better.
The preferred embodiment of the application is as follows: the nozzles of the gas-liquid two-phase spray head are opposite to the through holes and the hollowed-out parts of the fire-fighting support.
The beneficial effects are that: when a large amount of gas is generated by open fire in the battery pack box body, the gas circulation channel from the inside of the battery cell to the through hole of the battery cell end plate and the hollowed-out part of the fire-fighting support is shortest, and the accumulated gas is the most, so that the gas-liquid two-phase spray head is opposite to the through hole and the hollowed-out part of the fire-fighting support, the gas-liquid two-phase spray head can directly spray a large amount of gas, and the sprayed vaporific extinguishing agent can reach the fire-extinguishing part through the shortest circulation channel, so that the comprehensive fire-extinguishing effect is better.
The second object of the present application is to provide a fire extinguishing system of a battery pack, which comprises the fire extinguishing device of a battery pack, wherein the fire extinguishing system of a battery pack has the advantages of more reliable and stable real-time detection of a smoke sensor, and more timely and efficient detection when a large amount of gas is generated due to thermal runaway.
The preferred implementation mode of the fire extinguishing system of the battery pack is characterized by further comprising a temperature sensor, a VOC detector and a controller, wherein the temperature sensor and the VOC detector are arranged in the battery pack box body, the controller is arranged outside the battery pack box body, and the controller is used for controlling to perform early warning or starting a multi-stage fire extinguishing mode to perform fire extinguishing and cooling according to detection signals of the smoke sensor, the temperature sensor and the VOC detector.
The beneficial effects are that: the temperature of each electric core in the battery pack box body is detected in real time through the temperature sensor, the VOC detector monitors whether each electric core in the battery pack box body has the condition that electrolyte is revealed in real time, and gas components and concentration in the battery pack box body can be detected in real time through the smoke sensor, and then the fire extinguishing and the cooling are carried out in a mode of early warning or starting multistage fire extinguishing through the controller according to detection signals of the smoke sensor, the temperature sensor and the VOC detector, so that the fire safety of the whole battery pack is ensured.
Another object of the present application is to provide a fire extinguishing method of a battery pack, the method comprising: under the normal working state of the battery pack or when the gas in the battery pack is increased, a large amount of gas is instantaneously discharged through the explosion-proof pressure relief valve, a smoke sensor opposite to the explosion-proof pressure relief valve is used for sensing gas components and smoke concentration signals, the method enables the real-time detection of the smoke sensor to be more reliable and stable, and when thermal runaway occurs to generate a large amount of gas, the detection is more timely and efficient.
The preferred embodiment of the fire extinguishing method of the battery pack of the application is as follows: the temperature signal, the gas component and the concentration signal and the VOC leakage condition are detected in real time through the temperature sensor, the smoke sensor and the VOC detector respectively, and the controller controls to early warn or start a multi-stage fire extinguishing mode to extinguish and cool according to the temperature signal, the gas component and the smoke concentration signal and the VOC leakage condition.
The beneficial effects are that: the automatic and efficient control can be realized, and the fire extinguishing device is started or is subjected to fire extinguishing and cooling to ensure the fire extinguishing safety of the whole battery pack.
Drawings
FIG. 1 is a schematic view of a fire extinguishing apparatus of the battery pack of the present application;
FIG. 2 is a schematic view showing a partial structure of a fire extinguishing apparatus of the battery pack of the present application;
FIG. 3 is a schematic architectural diagram of a fire suppression system of the battery pack of the present application;
fig. 4 is a schematic structural view of a second embodiment of the fire extinguishing apparatus of the battery pack of the present application;
fig. 5 is a schematic structural view of a third embodiment of the fire extinguishing apparatus of the battery pack of the present application;
fig. 6 is a partially enlarged schematic illustration of the third embodiment.
Detailed Description
The following description of the preferred embodiments of the present application is provided in connection with the accompanying drawings, and it should be understood that the preferred embodiments described below are for illustration only and are not intended to limit the scope of the present application.
The terms first, second and the like in the description, in the claims and in the embodiments of the application, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The application is further described in detail below with reference to the preferred embodiments:
reference numerals in the drawings of the specification include: the battery pack box 501, the gas-liquid two-phase sprayer 502, the explosion-proof pressure release valve 503, the aerosol fire extinguisher 504, the smoke sensor 505, the support 5051, the fire-fighting bracket 506, the hollowed 5061, the strip-shaped hole 5062, the second connecting column 5063, the connecting bracket 507, the first connecting column 5071, the bolt 5072, the battery end plate 508 and the through hole 5081.
As shown in fig. 1 and 2: the embodiment discloses a fire extinguishing device of a battery pack, which comprises an aerosol fire extinguisher 504, a gas-liquid two-phase spray head 502, a smoke sensor 505, an explosion-proof pressure release valve 503, a fire-fighting bracket 506, a connecting bracket 507, a battery core end plate 508, a guide groove 509 and a first electromagnet 5091;
the standby gas-liquid two-phase spray head 601, the mounting seat 602, the guide rail 603, the mounting plate 604, the sliding block 605, the second electromagnet 606 and the magnet 607.
In this embodiment, the aerosol fire extinguisher 504, the smoke sensor 505, the fire-fighting bracket 506, the connection bracket 507 and the battery core end plate 508 are all disposed in the battery pack case 501, the gas-liquid two-phase spray head 502 and the explosion-proof pressure release valve 503 are all disposed on the battery pack case 501, the nozzle of the gas-liquid two-phase spray head 502 faces the inner side of the battery pack case, and the gas-liquid two-phase spray head 502 is located right above the explosion-proof pressure release valve 503, wherein one end of the portion of the gas-liquid two-phase spray head 502 located outside the battery pack case 501 is connected with a gas pipeline, the other end is connected with a liquid pipeline, and valves capable of being automatically opened or closed under the control of a controller are respectively disposed on the gas pipeline and the liquid pipeline.
Specifically, the smoke sensor 505 is detachably mounted on the fire-fighting bracket 506, in this embodiment, a plurality of supporting legs 5051 are disposed on the periphery of the smoke sensor 505, each supporting leg 5051 is provided with a mounting hole, a second connecting post 5063 is disposed on the fire-fighting bracket 506 corresponding to the mounting hole, and quick-dismantling and quick-mounting of the smoke sensor 505 is realized by mounting the second connecting post 5063 of Kong Karu.
In this embodiment, the fire-fighting bracket 506 is detachably mounted on the battery end plate 508, and specifically is connected through a connection bracket 507: in this embodiment, two groups of connecting brackets are respectively arranged on two sides of the upper portion of the fire-fighting bracket, the connecting brackets 507 are in an L shape, angle steel can be adopted, a first threaded hole is formed in a horizontal support leg 5051 of the connecting brackets 507, a second threaded hole is formed in the upper end face of the battery core end plate 508, bolts 5072 are connected in the first threaded hole and the second threaded hole in a threaded manner, a horizontal first connecting column 5071 is arranged on a vertical support leg 5051 of the connecting brackets 507, and a strip-shaped hole 5062 which is clamped on the first connecting column 5071 is formed in the upper portion of the fire-fighting bracket 506.
In this embodiment, the smoke sensor 505 and the explosion-proof pressure release valve 503 are close to each other and are opposite to each other, the fire-fighting bracket 506 is located at the smoke sensor 505 and the aerosol fire extinguisher 504, the electric core end plate 508 is provided with a through hole 5081 which can be opposite to the position of the hollow 5061, and the nozzle of the gas-liquid two-phase nozzle 502 is opposite to the through hole 5081 and the hollow 5061 of the fire-fighting bracket 506.
When the battery pack is in a normal working state, gas in the battery pack box body 501 flows to the outside through the explosion-proof pressure release valve 503, and the smoke sensor 505 is close to the explosion-proof pressure release valve 503 and faces the explosion-proof pressure release valve 503, so that the smoke sensor 505 is just on a flow path of the gas in the battery pack box body 501 flowing to the explosion-proof pressure release valve 503, and compared with other positions in the battery pack box body 501, the gas has certain fluidity, so that the real-time detection of the smoke sensor 505 can be ensured to be more reliable and stable, and the condition of the concentration and the components of the gas in the battery pack box body 501 can be integrally reflected; when the abnormality occurs in the battery pack case 501, the gas increases sharply, which results in a large amount of gas leaking out through the explosion-proof pressure release valve 503, in this process, since the smoke sensor 505 is close to the explosion-proof pressure release valve 503 and is designed to face the explosion-proof pressure release valve 503, the increase of the gas concentration and the change of the gas composition can be detected in time.
The fire-fighting bracket 506 is positioned at the positions of the smoke sensor 505 and the aerosol fire extinguisher 504 and is provided with the through holes 5081 corresponding to the positions of the hollowed-out parts 5061 on the battery cell end plate 508, so that the weight of the whole fire-fighting bracket 506 and the battery cell end plate 508 is reduced, and the transportation, the installation and the disassembly are more convenient; on the other hand, when the inside of the battery pack box 501 is in a normal state, the position of the whole fire-fighting bracket 506 is in a transverse direction, so that the hollow 5061 is not opposite to the through hole 5081 or the position of the fire-fighting bracket 506 is opposite to the through hole 5081, so that the normal detection of the smoke sensor 505 is not affected, excessive exposure of the inside of the battery core is not caused, dust prevention and waterproof effects are affected, when the inside of the battery core is abnormal, such as thermal runaway, the internal gas is rapidly increased, a large amount of gas flows to the through hole 5081 at the position of the battery core end plate 508 through the inside of the battery core, and then flows to the hollow 5061 of the fire-fighting bracket 506 through the through hole 5081, and then the fire-fighting bracket 506 is matched with the first connecting column 5071 of the connecting bracket 507 through the strip-shaped hole 5062, and the floating type connecting mode with adjustable transverse position is adopted, so that a large amount of rapidly increased gas can force the whole fire-fighting bracket 506 to generate trace transverse movement, the hollow 5061 of the fire-fighting bracket 506 is enabled to be directly opposite to the through hole 5081 of the battery core end plate 508, the pressure relief valve is enabled to be larger, the pressure of the inside of each battery core is enabled to be in a large enough, the inside of the battery core is enabled to be in a large enough, compared with the smoke sensor 505, the pressure sensor is enabled to be directly connected with the smoke sensor 505, and the pressure sensor is enabled to be directly connected to the pressure sensor, and has high pressure release effect.
In this embodiment, be equipped with the third spliced pole the lateral surface of electricity core end plate, open the mounting hole that has the bar in the position that corresponds the third spliced pole on the fire control support, the fire control support passes through in the mounting hole joint third spliced pole to also set up a plurality of stabilizer blades in aerosol fire extinguisher's periphery, all open the mounting hole on every stabilizer blade, the tip of mounting hole joint third spliced pole when the installation. This kind of design of this embodiment not only plays the effect of further supporting to the fire control support through the third spliced pole, the mounting hole of bar and the cooperation of third spliced pole moreover, when having a large amount of gaseous circulation to fire control support department, make the fire control support can the sideslip expose the via hole of electric core end plate, and can not make the fire control support fixed die, and the design of the mounting hole of bar hole and bar, more stable when can guaranteeing the fire control support sideslip, only connect smoke transducer on the fire control support, it has light in weight, small characteristics, can not cause the influence to the position fine setting of fire control support.
As shown in fig. 2, this embodiment also discloses a fire extinguishing system of a battery pack, including the fire extinguishing device of a battery pack as described above, further including a temperature sensor, a VOC detector and a controller disposed outside the battery pack, where the controller is configured to control early warning or start a multi-stage fire extinguishing mode to extinguish a fire and cool according to detection signals of the smoke sensor, the temperature sensor and the VOC detector.
In this embodiment, the early warning means that when the VOC detector detects that the electrolyte leaks and no open fire is generated, and the temperature of the battery core does not exceed the normal value, the warning device sends warning information to remind a worker to timely clean the leaked electrolyte and repair or replace the battery core or the electrical component in the battery pack, the multi-stage fire extinguishing mode means that when the temperature sensor detects that the temperature exceeds the normal value and the smoke concentration sensor detects that the gas component is abnormal and the concentration exceeds the normal value, the open fire is generated at this time, the aerosol fire extinguisher is started to extinguish the fire, and when the temperature is detected to reach the warning value and the concentration also reaches the warning value, the fire is stopped to spread, only one fire extinguishing mode cannot be controlled well, so that the secondary fire extinguishing is started, namely the gas-liquid two-phase spray head is automatically controlled to be started to extinguish the fire further.
The embodiment also discloses a fire extinguishing method of the battery pack, which comprises the following steps: under normal working state of the battery pack or when the gas in the battery pack is increased, a large amount of gas is instantaneously discharged through the explosion-proof pressure relief valve, gas components and smoke concentration signals are sensed through a smoke sensor opposite to the explosion-proof pressure relief valve, and further, the method detects temperature signals, gas components and concentration signals and VOC leakage conditions in real time through a temperature sensor, a smoke sensor and a VOC detector respectively, and a controller controls early warning or starts a multi-stage fire extinguishing mode to extinguish fire and cool down according to the temperature signals, the gas components and smoke concentration signals and the VOC leakage conditions.
Example two
The difference between this embodiment and the embodiment is that the fire extinguishing device of the battery pack of this embodiment further discloses a connection mode between the smoke sensor and the fire-fighting bracket 506, in this embodiment, two guide slots 509 along the vertical direction are provided on two sides of the fire-fighting bracket, which are located at the hollow 5061, the cross section of the guide slots 509 is dovetail-shaped, the lower parts of the guide slots extend downward beyond the hollow 5061, a first electromagnet 5091 is provided at the bottom of the guide slots, which is located at the position opposite to the explosion-proof pressure release valve, two sliding blocks (not shown in the figure) slidingly matched with the guide slots are provided on the inner side surface of the smoke sensor, metal sheets capable of being absorbed by the first electromagnet 5091 are provided at the bottom of the sliding blocks, and the on-off of the first electromagnet 5091 is controlled by a controller provided in the battery pack.
When the battery pack works normally, the electromagnet is electrified, so that the smoke sensor is adsorbed, the smoke sensor faces the explosion-proof pressure release valve, a large amount of gas is generated in the battery pack, and the smoke sensor timely detects that the smoke concentration is increased, and simultaneously, the pressure of the large amount of gas is released through the explosion-proof pressure release valve. If after the explosion-proof pressure release valve and the outside of the battery pack form a free gas channel, the smoke sensor is still in a right position with the explosion-proof pressure release valve, and the smoke concentration at the position is lower than the smoke concentration at other positions of the battery pack due to the rapid circulation of gas at the explosion-proof pressure release valve, so that the smoke concentration detected by the smoke sensor is inaccurate.
The embodiment further discloses a fire-extinguishing early warning method of battery pack, still includes smoke sensor position adjustment step, and after explosion-proof relief valve was released the pressure, the electro-magnet outage was controlled to the controller to make smoke sensor slide to the position that is close to battery pack bottom along the guide way under self gravity effect, thereby no longer just right with explosion-proof relief valve.
Example III
The first difference between this embodiment and the second embodiment is that: in this embodiment, the device further includes a standby gas-liquid two-phase spray head 601, a via hole is formed on the battery box 501, the standby gas-liquid two-phase spray head 601 horizontally passes through the via hole, one end of a nozzle of the standby gas-liquid two-phase spray head faces the inside of the battery box 501, a mounting seat 602 is provided outside the battery box 501, a guide rail 603 is provided on the upper portion of the mounting seat 602, a mounting plate 604 is provided at one end of the standby gas-liquid two-phase spray head 601 far away from the nozzle, sliders 605 are respectively provided at two sides of the lower portion of the mounting plate 604, the sliders 605 are in sliding fit with the guide rail 603, a second electromagnet 606 is provided at an end of the mounting seat 602 near the battery box 501, which is provided with a magnet 607 capable of being adsorbed or repelled by the second electromagnet 606, and the polarity of the second electromagnet 606 is controlled by a controller according to the temperature collected in the battery box 501 and the temperature collected in the energy storage container.
The use scene and principle of this scheme lie in: in the electrochemical energy storage technology, a battery pack is a basic energy storage unit and is formed by installing a plurality of groups of battery modules inside a battery box, each group of battery modules comprises a plurality of battery cores which are arranged in a row, a temperature sensor is arranged on each battery core, the temperature inside the battery box is measured by the highest value of the temperature collected in each battery core, the plurality of battery packs form an energy storage container, the temperatures outside the battery box and inside the shell of the energy storage container are collected through the temperature sensors inside the energy storage container, and in addition, smoke sensors are also arranged inside and outside the battery box.
Description: in the application, in a normal initial state, the second electromagnet is electrified to enable the polarity of the second electromagnet to be different from that of the magnet, so that the magnet is adsorbed, a nozzle of the standby gas-liquid two-phase spray head faces the inside of the battery box, the standby gas-liquid two-phase spray head is always connected with a fire-fighting pipeline, and a valve is arranged on the fire-fighting pipeline.
The application is provided with the standby gas-liquid two-phase spray head, and has the following advantages: when the temperature inside a certain battery box is too high and the gas concentration is too high and exceeds the warning value to approach the dangerous value, the controller can control the valve on the fire-fighting pipeline to be opened at the moment, so that the standby gas-liquid two-phase spray head is started to extinguish the fire inside the battery box.
When the temperature sensor in the energy storage container collects the temperature in the whole energy storage container to be too high, the smoke sensor in the energy storage container collects smoke concentration to be too high, the fact that open fire is generated is required to extinguish fire, and when the temperature and the smoke concentration in the single battery box are not close to dangerous values, the controller can control the second electromagnet to be electrified with reverse current, so that the polarities of the second electromagnet and the magnets are the same, and the second electromagnet repels each other, the sliding blocks positioned on two sides of the lower portion of the mounting plate slide along the guide rail under the repulsive force effect, so that the standby gas-liquid two-phase spray head is driven to gradually withdraw from the through hole of the battery box until the nozzle of the gas-liquid two-phase spray head is completely positioned between the outside of the battery box and the shell of the energy storage container, then the controller controls the valve to be opened, the standby gas-liquid two-phase spray head is started to extinguish fire, meanwhile, after the standby gas-liquid two-phase spray head withdraws from the through hole, the battery box and the inner space of the energy storage container are communicated, so that the internal gas flow inside the battery box or the inner space of the energy storage container is better, and the explosion danger caused by mass aggregation of gas in the internal gas flow of the battery box or the gas flow difference inside the energy storage container is avoided, and the design has more outstanding technical effects.
The preferred embodiments of the present application have been described in detail with reference to the accompanying drawings, in which typical known structures and common general knowledge are not described in any way, and those skilled in the art can complete and practice the technical scheme of the present application with their own capabilities in light of the present disclosure, and some typical known structures, known methods or common general knowledge should not be taken as an obstacle for the practice of the present application by those of ordinary skill in the art.
The protection scope of the present application is subject to the content of the claims, and the content of the application, the detailed description and the drawings of the specification are used for explaining the claims.
Several modifications can be made to the embodiments of the present application within the technical concept of the present application, and the modified embodiments should be considered as being within the scope of the present application.
Claims (10)
1. A fire extinguishing device of battery package, its characterized in that: including being located the smoke transducer of battery package box and being located the explosion-proof relief valve on the battery package box, smoke transducer with explosion-proof relief valve is close to each other and just to setting.
2. The fire extinguishing apparatus of a battery pack according to claim 1, wherein: the battery pack is characterized by further comprising an aerosol fire extinguisher which is arranged in the battery pack box body and is close to the smoke sensor, wherein a fire-fighting support is arranged in the battery pack box body, the smoke sensor is detachably mounted on the fire-fighting support, and the fire-fighting support is detachably mounted on the battery core end plate.
3. The fire extinguishing apparatus of a battery pack according to claim 2, wherein: still include the linking bridge of L type, it has first screw hole to open on the horizontal stabilizer blade of linking bridge, and open there is the second screw hole battery core end plate up end, at first screw hole and second screw hole internal thread connecting bolt be equipped with horizontal first spliced pole on the vertical stabilizer blade of linking bridge, open on the upper portion of fire control support has the bar hole of joint on first spliced pole.
4. A fire extinguishing apparatus for a battery pack according to claim 3, wherein: the fire-fighting support is located at the smoke sensor and the aerosol fire extinguisher and is hollow, and through holes which can be opposite to the hollow positions are formed in the end plates of the battery cells.
5. A fire extinguishing apparatus for a battery pack according to claim 3, wherein: the anti-explosion device is characterized by further comprising a gas-liquid two-phase spray head which is arranged on the battery pack box body and the spray nozzle faces the inner side of the battery box body, and the gas-liquid two-phase spray head is positioned right above the anti-explosion pressure release valve.
6. The fire extinguishing apparatus of a battery pack according to claim 5, wherein: the nozzles of the gas-liquid two-phase spray head are opposite to the through holes and the hollowed-out parts of the fire-fighting support.
7. A fire suppression system for a battery pack, characterized by: fire extinguishing device comprising a battery pack according to any of claims 1-6.
8. The battery pack fire suppression system of claim 7, wherein: still including setting up temperature sensor, VOC detector and the controller of setting outside the battery package box in the battery package box, the controller is used for carrying out early warning or starting multistage fire extinguishing mode and putting out a fire and cooling according to smoke transducer, temperature sensor, VOC detector's detected signal.
9. A fire extinguishing method for a battery pack, which is characterized in that: under the normal working state of the battery pack or when the gas in the battery pack is increased, a large amount of gas is instantaneously discharged through the explosion-proof pressure release valve, and a smoke sensor opposite to the explosion-proof pressure release valve is used for sensing gas components and smoke concentration signals.
10. The fire suppression method of a battery pack according to claim 9, wherein: the temperature signal, the gas component and the concentration signal and the VOC leakage condition are detected in real time through the temperature sensor, the smoke sensor and the VOC detector respectively, and the controller controls to early warn or start a multi-stage fire extinguishing mode to extinguish and cool according to the temperature signal, the gas component and the smoke concentration signal and the VOC leakage condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571486.3A CN116570861A (en) | 2023-05-19 | 2023-05-19 | Fire extinguishing device, system and method for battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571486.3A CN116570861A (en) | 2023-05-19 | 2023-05-19 | Fire extinguishing device, system and method for battery pack |
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| CN202310571486.3A Pending CN116570861A (en) | 2023-05-19 | 2023-05-19 | Fire extinguishing device, system and method for battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116845406A (en) * | 2023-08-28 | 2023-10-03 | 宁德时代新能源科技股份有限公司 | Battery and electricity utilization device |
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2023
- 2023-05-19 CN CN202310571486.3A patent/CN116570861A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116845406A (en) * | 2023-08-28 | 2023-10-03 | 宁德时代新能源科技股份有限公司 | Battery and electricity utilization device |
| CN116845406B (en) * | 2023-08-28 | 2024-03-01 | 宁德时代新能源科技股份有限公司 | Battery and electricity utilization device |
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