CN106063979B - Water-based fire extinguishing device special for automobile lithium battery box - Google Patents
Water-based fire extinguishing device special for automobile lithium battery box Download PDFInfo
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- CN106063979B CN106063979B CN201610713481.XA CN201610713481A CN106063979B CN 106063979 B CN106063979 B CN 106063979B CN 201610713481 A CN201610713481 A CN 201610713481A CN 106063979 B CN106063979 B CN 106063979B
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- fire
- fire extinguishing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Secondary Cells (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention discloses a special water-based fire extinguishing device for a lithium battery box of an automobile, which comprises a plurality of groups of battery groups, wherein each group of battery groups is provided with a fire monitoring device and a fire extinguishing device, the fire extinguishing device is connected with the fire monitoring device through electric signals, the fire extinguishing device comprises a host and fire extinguishing pipes, the host comprises a host shell, a plurality of fire extinguisher tank bodies are arranged in the host shell, main valve bodies are arranged on the fire extinguisher tank bodies, a main controller and a valve body converter which correspond to the fire extinguisher tank bodies are arranged on the host shell, the main controller is electrically connected with the corresponding main valve bodies and the valve body converter, the fire monitoring device is electrically connected with the main controller, the valve body converter is connected with the corresponding main valve body, and the valve body converter is connected with the battery box corresponding to the battery group through the fire extinguishing pipes. The invention has the beneficial effects that: it has the advantages of safety, reliability, convenient use and quick fire extinguishing.
Description
Technical Field
The invention relates to the field of emergency rescue and fire fighting, in particular to a special water-based fire extinguishing device for a lithium battery box of an automobile.
Background
With the enhancement of environmental awareness of people, in recent years, the field of new energy vehicles is rapidly developed, more and more vehicles using lithium batteries as power are adopted, the sales volume of pure electric vehicles and hybrid electric vehicles increases by 30% every year, and bus companies and automobile manufacturers all over are mounting full-automatic fire extinguishing devices on battery cabins. Because every car all installs 2 ~ 12 unequal group batteries, some even more, all should have extinguishing device to carry out the protection of putting out a fire to every group battery, but when the group battery was more, the car did not have the space all extinguishing device of installation. The invention skillfully solves the imminent problem, can adopt two sets of fire extinguishing devices to simultaneously monitor twelve groups of automobile lithium batteries when the installation space of the vehicle is limited, and quickly extinguish the fire of the battery box which is on fire first, and is safe and reliable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the special water-based fire extinguishing device for the automobile lithium battery box, which is safe and reliable, convenient to use and high in fire extinguishing efficiency.
The purpose of the invention is realized by the following technical scheme: the utility model provides a special water base extinguishing device of car lithium cell case, it includes multiunit battery crowd, every group battery crowd all is provided with condition of a fire monitoring devices and extinguishing device, extinguishing device and condition of a fire monitoring devices pass through signal of telecommunication and be connected, extinguishing device include host computer and fire extinguishing pipe, the host computer include the host computer casing, the host computer casing in be provided with a plurality of fire extinguisher tank bodies, the fire extinguisher tank body on be provided with the main valve body, the host computer casing on be provided with main control unit and the valve body converter that corresponds with the fire extinguisher tank body, main control unit and the main valve body and the valve body converter electricity that correspond be connected, condition of a fire monitoring devices and main control unit electricity be connected, the valve body converter with the main valve body coupling that corresponds, and the valve body converter passes through the fire extinguishing pipe and is connected with the battery box that corresponds the battery crowd.
The valve body converter comprises a valve body, a sliding column, a fire extinguishing agent inlet joint, a fire extinguishing agent outlet joint and a gas generating element, at least one sliding cavity is arranged in the valve body and is sealed by an upper cover, and the bottom of the upper cover is provided with a gas generating element, the bottom of the valve body is provided with a liquid inlet cavity, the fire extinguishing agent inlet joint is arranged on the valve body, the fire extinguishing agent inlet joint is communicated with the liquid inlet cavity, the liquid inlet cavity is communicated with the sliding cavity, a sliding column is matched in the sliding cavity in a sliding way, the sliding column is fixed by an easy-to-break positioning device arranged on the valve body, the sliding column seals the communication part of the sliding cavity and the liquid inlet cavity, the sliding column is provided with a transition groove, through holes are formed in two sides of the transition groove, a fire extinguishing agent outlet connector is communicated with the side wall of the transition groove, and the fire extinguishing agent outlet connector is installed on the valve body.
The easy-to-break positioning device comprises a shearing pin, a pin hole is formed in the side wall of the sliding cavity, the shearing pin penetrates through the sliding column, two ends of the shearing pin are located in the pin hole, and two ends of the pin hole are sealed through the shearing pin.
The bottom of the sliding column is provided with a circle of sealing groove, and an O-shaped rubber sealing ring is arranged in the sealing groove.
The liquid inlet cavity is communicated with the bottom of the valve body, and two ends of the liquid inlet cavity are sealed by plugs.
The fire extinguisher tank body and the battery group are two, the fire extinguisher tank body and the battery group are in one-to-one correspondence, each battery group consists of six battery boxes, and the battery boxes are all provided with sensors.
The fire monitoring device comprises an operating panel, a controller and a data acquisition unit, wherein the operating panel is electrically connected with the controller, the controller is electrically connected with the data acquisition unit, and the data acquisition unit is electrically connected with a sensor.
The fire extinguisher tank body is arranged on the tank body support through a tank body fixing ring arranged on the tank body support.
The main machine shell passes through the host computer upper cover closing cap, and still installs a plurality of couplings and pencil plug connector on the terminal surface of main machine shell, the one end and the fire extinguishing agent outlet connection of coupling be connected, the other end and the fire extinguishing pipe of coupling are connected.
The invention has the following advantages:
1. the valve body converter can carry out single-point or multiple spot to a plurality of battery boxes and put out a fire to reduce extinguishing device's space occupation rate, thereby solved the group battery more, the limited technological problem in space of extinguishing device installation adopts two sets of extinguishing device to carry out simultaneous monitoring to twelve group car lithium cells, and puts out a fire, safe and reliable to the battery box that at first fires fast.
2. In twelve lithium battery boxes, as long as a group of sensors in one of the battery boxes detect a fire signal, an operation panel can immediately give an alarm to remind a driver to check the fire, and meanwhile, a fire extinguishing agent channel is rapidly opened under the action of a generator inside a main valve body and a valve body converter, so that the fire extinguishing agent inside a fire extinguisher tank body rapidly flows to the battery box to immediately extinguish fire.
3. When the fire extinguishing agent flows to the designated cabin, the fire extinguishing agent cannot flow to other cabins, so that the scrappage of the converter part of the valve body is reduced, and the production cost is reduced.
4. The invention has simple installation and convenient use.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a host;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic top view of the present invention;
FIG. 5 is a schematic cross-sectional view of A-A in FIG. 4;
FIG. 6 is a schematic cross-sectional view of B-B of FIG. 4;
FIG. 7 is a schematic cross-sectional view of C-C of FIG. 5;
in the figure, 1-host, 2-pipeline, 3-operation panel, 4-controller, 5-data collector, 6-wiring harness plug connector, 7-battery box, 8-sensor, 9-host upper cover, 10-host shell, 11-tank fixed ring, 12-fire extinguisher tank, 13-tank support, 14-main valve body, 15-main controller, 16-valve converter, 8-pipe joint, 21-valve body, 22-sliding column, 23-fire extinguishing agent outlet joint, 24-plug, 25-O-shaped rubber sealing ring, 26-fire extinguishing agent inlet joint, 27-shearing pin, 28-gas generating element, 29-upper cover, 30-sliding cavity, 31-transition groove, 32-through hole, 33-liquid inlet cavity, 34-limit screw.
Detailed Description
The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:
as shown in fig. 1 and 2, a water-based fire extinguishing apparatus dedicated for a lithium battery box of an automobile comprises a plurality of groups of battery groups, each group of battery groups is provided with a fire monitoring device and a fire extinguishing device, the fire extinguishing device is connected with the fire monitoring device through an electric signal, the fire extinguishing device comprises a main machine 1 and a fire extinguishing pipe 2, the main machine 1 comprises a main machine housing 10, a plurality of fire extinguisher tank bodies 12 are arranged in the main machine housing 10, main valve bodies 14 are arranged on the fire extinguisher tank bodies 12, a main controller 15 and a valve body converter 16 corresponding to the fire extinguisher tank bodies 12 are arranged on the main machine housing 10, the main controller 15 is electrically connected with the corresponding main valve bodies 14 and the valve body converter 16, the fire monitoring device is electrically connected with the main controller 15, the valve body converter 16 is connected with the corresponding main valve bodies 14, and the valve body converter 16 is connected with a battery box 7 corresponding to the battery group through the fire extinguishing pipe 2, the fire extinguisher tank body 2 and the battery group are two, the fire extinguisher tank body 2 and the battery group are in one-to-one correspondence, each battery group consists of six battery boxes 7, namely, one fire extinguisher tank body 2 can extinguish fire for six battery boxes 7, two fire extinguisher tank bodies 2 can extinguish fire for twelve battery boxes 7, the fire extinguishing requirement of a large-capacity battery group is met, the battery boxes 7 are all provided with sensors, the sensors can comprehensively detect the battery boxes 7, particularly detect the temperature, the fire monitoring device comprises an operating panel 3, a controller 4 and a data collector 5, the operating panel 3 is electrically connected with the controller 4, the controller 4 is electrically connected with the data collector 5, the data collector 5 is electrically connected with the sensors, the controller 4 is electrically connected with a main controller 15, and the data detected by the sensors at any time are transmitted to the data collector 5, data acquisition unit 5 will data collection to handle data, then give main control unit 15 with signal transmission, main control unit 15 control main valve body 14 and valve body converter 16 work, then send the fire extinguishing agent of fire extinguisher tank body 2 to the battery box 7 that has the condition of a fire, reach the purpose of putting out a fire, in this embodiment, the water system fire extinguishing agent that the car lithium cell was developed specially, it is nontoxic harmless, green, the speed of putting out a fire is twelve to seven times faster than ordinary fire extinguishing agent, shorten the time of putting out a fire greatly, reduce fire loss.
In this embodiment, as shown in fig. 3 to 7, the valve body converter 16 includes a valve body 21, a sliding column 22, a fire extinguishing agent inlet joint 23, a fire extinguishing agent outlet joint 26, and a gas generating element 28, the valve body 21 is internally provided with at least one sliding cavity 30, in this embodiment, six sliding cavities 30 are provided, which can extinguish fire for six battery boxes simultaneously, and can also realize fire extinguishing for a single battery box, the sliding cavity 30 is sealed by an upper cover 29, the bottom of the upper cover 29 is provided with the gas generating element 28, the gas generating element 28 is a blasting type gas generating element, that is, a small amount of powder is installed in the gas generating element 28, the gas generating element 28 is provided with an electrical connection port, when the gas generating element 28 is electrically conducted through a controller, the powder explodes to generate a high pressure gas flow, the bottom of the valve body 21 is provided with a liquid inlet cavity 33, the fire extinguishing agent inlet joint 23 is installed on the valve body 21, and the fire extinguishing agent inlet joint 23 is communicated with the liquid inlet cavity 33, the fire extinguishing agent inlet joint 23 is connected with a fire extinguishing agent storage device, the liquid inlet cavity 33 is communicated with the sliding cavity 30, the sliding cavity 30 is internally and slidably matched with the sliding column 22, the sliding column 22 is fixed by an easy-to-break positioning device arranged on the valve body 21, in the embodiment, the easy-to-break positioning device comprises a shearing pin 27, a pin hole is arranged on the side wall of the sliding cavity 30, the shearing pin 27 penetrates through the sliding column 22, two ends of the shearing pin 27 are positioned in the pin hole, two ends of the pin hole are sealed by a limiting screw 34, after the limiting screw 34 is locked, two ends of the shearing pin 27 cannot exit from the pin hole, the sliding column 22 seals the communication part of the sliding cavity 30 and the liquid inlet cavity 33, further, the bottom of the sliding column 22 is provided with a circle of sealing groove, an O-shaped rubber sealing ring 25 is arranged in the sealing groove, the shearing pin 27 is broken by high-pressure airflow generated by the gas generating element 28, the sliding column 22 rapidly moves downwards along the sliding cavity 30 under the action of the high-pressure airflow, the sliding column 22 is provided with a transition groove 31, two sides of the transition groove 31 are provided with through holes 32, the side wall of the transition groove 31 is also communicated with a fire extinguishing agent outlet connector 26, the fire extinguishing agent outlet connector 26 is installed on the valve body 21, after the sliding column 22 moves into the liquid inlet cavity 33, the liquid inlet cavity 33 is communicated with the transition groove 31 through the through holes 32, at the moment, the fire extinguishing agent in the liquid inlet cavity 33 enters the transition groove 31 through the through holes 32, and finally enters the battery box with fire through the fire extinguishing agent outlet connector 26 to extinguish the fire.
In this embodiment, feed liquor chamber 33 link up the bottom of valve body 21 to make feed liquor chamber 33 and sliding chamber 30 processing convenient, the both ends of feed liquor chamber 33 are sealed through end cap 24, guarantee the sealing performance in feed liquor chamber 33, fire extinguishing agent outlet joint 3, fire extinguishing agent inlet joint 6, end cap 24 all adopt threaded connection with valve body 21, thereby make fire extinguishing agent outlet joint 3, fire extinguishing agent inlet joint 6, end cap 24 all detachable, thereby be convenient for the valve body maintenance.
In this embodiment, the main housing 10 is provided with a tank bracket 13, and the fire extinguisher tank 12 is mounted on the tank bracket 13 through a tank fixing ring 11 arranged on the tank bracket 13, so as to ensure the fixed mounting of the fire extinguisher tank 12.
In this embodiment, host computer casing 10 pass through host computer upper cover 9 closing cap, host computer upper cover 9 makes the host computer be sealed box to guaranteed that interior electrical component of host computer does not receive external disturbance, guaranteed host computer component's life, and still install a plurality of couplings 8 and pencil plug connector 6 on host computer casing 10's terminal surface, coupling 8's one end and fire extinguishing agent outlet joint 26 be connected, coupling 8's the other end and fire extinguishing pipe 2 are connected, pencil plug connector 6 be used for in the host computer electrical component's connecting wire and external electrical component's intercommunication.
The working process of the invention is as follows: when a fire occurs in the battery box, the sensor of the battery box detects the fire, the sensor transmits a fire signal to the data collector, the data collector transmits the signal to the main controller and the controller, the main controller controls the main valve body and the valve body converter to work, so that the fire extinguisher tank body is communicated with a fire extinguishing pipe of the battery box in which the fire occurs, a fire extinguishing agent in the fire extinguisher tank body enters the battery box to extinguish the battery box, the controller controls the command control panel to give an alarm prompt to remind a driver of the fire, the driver can take corresponding emergency measures according to the fire, and when the driver finds the fire, the forced fire extinguishing switch on the control panel can be opened, the controller transmits the signal to the main controller, and the main controller controls all the main valve bodies and the gas generating elements to work, so that the forced fire extinguishing of the battery box is realized.
Claims (5)
1. The utility model provides a special water base extinguishing device of car lithium cell box, it includes multiunit battery crowd, every group battery crowd all is provided with fire monitoring devices and extinguishing device, extinguishing device and fire monitoring devices pass through signal of telecommunication and connect its characterized in that: the fire extinguishing device comprises a main machine (1) and fire extinguishing pipes (2), wherein the main machine (1) comprises a main machine shell (10), a plurality of fire extinguisher tank bodies (12) are arranged in the main machine shell (10), main valve bodies (14) are arranged on the fire extinguisher tank bodies (12), a main controller (15) and a valve body converter (16) which correspond to the fire extinguisher tank bodies (12) are arranged on the main machine shell (10), the main controller (15) is electrically connected with the corresponding main valve bodies (14) and the valve body converter (16), a fire condition monitoring device is electrically connected with the main controller (15), the valve body converter (16) is connected with the corresponding main valve bodies (14), the valve body converter (16) is connected with a battery box (7) corresponding to a battery group through the fire extinguishing pipes (2), and a water system specially developed by an automobile lithium battery is adopted in the fire extinguishing agent tank body (12), the fire extinguishing agent is nontoxic and harmless, is green and environment-friendly, has the fire extinguishing speed twelve to seven times faster than that of the common fire extinguishing agent, greatly shortens the fire extinguishing time, and reduces the fire loss;
the valve body converter comprises a valve body (21), a sliding column (22), a fire extinguishing agent inlet joint (23), a fire extinguishing agent outlet joint (26) and a gas generating element (28), wherein six sliding cavities (30) are formed in the valve body (21), the sliding cavities (30) are sealed through an upper cover (29), the bottom of the upper cover (29) is provided with the gas generating element (28), the bottom of the valve body (21) is provided with a liquid inlet cavity (33), the fire extinguishing agent inlet joint (23) is installed on the valve body (21), the fire extinguishing agent inlet joint (23) is communicated with the liquid inlet cavity (33), the liquid inlet cavity (33) is communicated with the sliding cavity (30), the sliding cavity (30) is internally matched with the sliding column (22) in a sliding mode, the sliding column (22) is fixed through an easy-folding positioning device arranged on the valve body (21), and the sliding column (22) seals the communication position of the sliding cavity (30) and the liquid inlet cavity (33), the sliding column (22) is provided with a transition groove (31), two sides of the transition groove (31) are provided with through holes (32), the side wall of the transition groove (31) is also communicated with a fire extinguishing agent outlet joint (26), and the fire extinguishing agent outlet joint (26) is arranged on the valve body (21);
the easy-to-break positioning device comprises a shearing pin (27), a pin hole is formed in the side wall of the sliding cavity (30), the shearing pin (27) penetrates through the sliding column (22), two ends of the shearing pin (27) are located in the pin hole, and two ends of the pin hole are sealed through a shearing pin (34);
a circle of sealing groove is formed in the bottom of the sliding column (22), and an O-shaped rubber sealing ring (25) is installed in the sealing groove;
the liquid inlet cavity (33) penetrates through the bottom of the valve body (21), and two ends of the liquid inlet cavity (33) are sealed by plugs (24);
when a fire occurs in the battery box, the sensor of the battery box detects the fire, the sensor transmits a fire signal to the data collector, the data collector transmits the signal to the main controller and the controller, the main controller controls the main valve body and the valve body converter to work, so that the fire extinguisher tank body is communicated with a fire extinguishing pipe of the battery box in which the fire occurs, a fire extinguishing agent in the fire extinguisher tank body enters the battery box to extinguish the battery box, the controller controls the command control panel to give an alarm prompt to remind a driver of the fire, the driver can take corresponding emergency measures according to the fire, and when the driver finds the fire, the forced fire extinguishing switch on the control panel can be opened, the controller transmits the signal to the main controller, and the main controller controls all the main valve bodies and the gas generating elements to work, so that the forced fire extinguishing of the battery box is realized.
2. The water-based fire extinguishing device special for the lithium battery box of the automobile according to claim 1, characterized in that: the fire extinguisher tank body (2) and the battery group are two, the fire extinguisher tank body (2) and the battery group are in one-to-one correspondence, each battery group consists of six battery boxes (7), and the battery boxes (7) are all provided with sensors.
3. The water-based fire extinguishing device special for the lithium battery box of the automobile according to claim 1, characterized in that: the fire monitoring device comprises an operating panel (3), a controller (4) and a data acquisition unit (5), wherein the operating panel (3) is electrically connected with the controller (4), the controller (4) is electrically connected with the data acquisition unit (5), and the data acquisition unit (5) is electrically connected with a sensor.
4. The water-based fire extinguishing device special for the lithium battery box of the automobile according to claim 1, characterized in that: the fire extinguisher tank is characterized in that a tank body support (13) is arranged on the main machine shell (10), and the fire extinguisher tank body (12) is arranged on the tank body support (13) through a tank body fixing ring (11) arranged on the tank body support (13).
5. The water-based fire extinguishing device special for the lithium battery box of the automobile as claimed in claim 2, characterized in that: host computer casing (10) pass through host computer upper cover (9) closing cap, and still install a plurality of adapters (8) and pencil plug connector (6) on the terminal surface of host computer casing (10), the one end and the fire extinguishing agent outlet joint (26) of adapter (8) be connected, the other end and the fire extinguishing pipe (2) of adapter (8) are connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610713481.XA CN106063979B (en) | 2016-08-24 | 2016-08-24 | Water-based fire extinguishing device special for automobile lithium battery box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610713481.XA CN106063979B (en) | 2016-08-24 | 2016-08-24 | Water-based fire extinguishing device special for automobile lithium battery box |
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| CN106063979B true CN106063979B (en) | 2022-06-10 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398049B (en) * | 2017-06-22 | 2020-11-20 | 哲弗智能系统（上海）有限公司 | Vehicle-mounted battery fire extinguishing structure using mixed fire extinguishing agent |
| CN109316687B (en) * | 2017-07-31 | 2021-05-11 | 华为技术有限公司 | Fire extinguishing method of battery system and battery system |
| CN107433000A (en) * | 2017-08-09 | 2017-12-05 | 湖南鸿腾新能源技术有限公司 | Fire alarm and protector and its method of work for car lithium battery box |
| CN108355275A (en) * | 2018-02-11 | 2018-08-03 | 温州安班科技有限公司 | The cell safety extinguishing device that can be recycled |
| CN108721807A (en) * | 2018-06-26 | 2018-11-02 | 常州泰伊尔特科技有限公司 | Presetting system mixed gas lithium battery box fire alarm and protective device and its working method |
| CN110227221B (en) * | 2019-07-05 | 2023-12-29 | 安徽鑫思诚科技有限公司 | Intelligent fire extinguishing device for lithium battery box of electric vehicle |
| CN112002846B (en) * | 2020-09-08 | 2022-03-11 | 北京未来智酷汽车科技有限公司 | Battery container, fire extinguishing method for battery of battery container, and vehicle |
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| CN103307343A (en) * | 2013-05-14 | 2013-09-18 | 哈尔滨工程大学 | Short stroke quick release valve for starting detonating impact |
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| CN206183833U (en) * | 2016-08-24 | 2017-05-24 | 四川华川工业有限公司 | Special water base extinguishing device of car lithium battery box |
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| WO2010106381A2 (en) * | 2009-03-20 | 2010-09-23 | Tomislav Bazant | Automatic motor vehicle engine fire extinguisher system |
| CN103307343A (en) * | 2013-05-14 | 2013-09-18 | 哈尔滨工程大学 | Short stroke quick release valve for starting detonating impact |
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Address after: Shiling Town, Longquanyi District, Chengdu, Sichuan 610000 Patentee after: Sichuan Huachuan Industry Co.,Ltd. Address before: Shiling Town, Longquanyi District, Chengdu, Sichuan 610000 Patentee before: SICHUAN HUACHUAN INDUSTRIES Co.,Ltd. |
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