CN112909408A - Anti-combustion heat preservation power battery case and automatic fire extinguishing device - Google Patents
Anti-combustion heat preservation power battery case and automatic fire extinguishing device Download PDFInfo
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- CN112909408A CN112909408A CN201911213082.7A CN201911213082A CN112909408A CN 112909408 A CN112909408 A CN 112909408A CN 201911213082 A CN201911213082 A CN 201911213082A CN 112909408 A CN112909408 A CN 112909408A
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- power battery
- battery box
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
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- 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
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
A fire-proof heat-preservation power battery box and an automatic fire extinguishing device comprise a power battery box body and a power battery box cover, wherein heat-preservation layers are respectively arranged on the inner surface of the power battery box body and the back surface of the power battery box cover, a charging socket and a heat-preservation control switch are arranged on the power battery box body, and high-temperature-resistant fire-proof layers are also arranged on the outer surface of the heat-preservation layer of the power battery box body and the outer surface of the heat-preservation layer of the power battery box cover; heating element and temperature switch are still installed to the surface of the high temperature resistant flame retardant coating in the power battery box body, and heating element one end and temperature switch one end are connected, and the temperature switch other end and heat preservation control switch one end are connected, and the heat preservation control switch other end is connected with the positive pole of the socket that charges, and heating element's the other end and the negative pole of the socket that charges are connected. The power battery pack is placed in the anti-combustion heat-insulation power battery box for use, the anti-combustion heat-insulation power battery box is connected with the matched automatic fire extinguishing device when charging, if a fire breaks out, the fire condition can be controlled in the box body, the running distance of the electric bicycle can be effectively prolonged in winter, and the electric vehicle is convenient and practical.
Description
Technical Field
The invention relates to a power battery box and an automatic fire extinguishing device, in particular to a combustion-proof heat-preservation power battery box and a matched automatic fire extinguishing device.
Background
The use of electric bicycles is very common at present, but there are two problems: 1. when the power battery is charged, due to various reasons, such as overcharge of the power battery, some power batteries can generate thermal runaway to damage the power battery to generate short circuit, even can burn and fire, and lithium batteries can explode to cause fire sometimes and even cause life loss and property loss of personnel. 2. The battery as a power source has characteristics, and the temperature greatly affects the charging and discharging performance of the battery. The practical use of the electric bicycle has the experience that the electric bicycle runs far closer to the winter than the hot weather, and sometimes the electric bicycle only runs half or even less. The lead-acid storage battery has the advantages that the activity of each active substance is reduced at low temperature, the Pb on the electrode is difficult to dissolve, the lead-acid storage battery is difficult to replenish after consuming Pb during charging, the amplitude of the charging current is reduced, the charging acceptance current of a positive plate is only 70% of the normal temperature at the temperature of minus 20 ℃, the charging acceptance current of a negative electrode is influenced by an expanding agent, the low-temperature charging acceptance capacity is lower, and the charging acceptance current at the temperature of minus 20 ℃ is only 40% of the normal temperature. Therefore, when the battery is used at low temperature, heat preservation and anti-freezing measures are taken, and particularly, the battery is charged in a warm environment, so that the full charge is ensured, the generation of irreversible sulfate is prevented, and the service life of the battery is prolonged. The optimum use temperature of a general storage battery is 25 ℃, the available capacity of the storage battery is greatly reduced by 0.8% when the available capacity is reduced by 1 degree, the capacity is recovered when the temperature is increased, and the capacity of the storage battery is changed along with the change of the temperature, so the temperature of the storage battery must be controlled to be kept within a range of about 25 ℃ in the day, the service life and the discharge time of the storage battery can be better maintained, and other types of storage batteries have similar characteristics. Especially in winter, if the temperature is too cold, measures must be taken to raise the temperature once it reaches subzero. The battery box of the conventional electric bicycle is a plastic box and does not have any heat preservation function. In order to prevent the thermal runaway of the charging of the storage battery, control the range in the power battery box as far as possible when internal short circuit combustion occurs, prevent the combustion from reaching other electric vehicles, even other objects such as houses and the like, and enable the storage battery to work in the range of about 25 ℃ in winter, a combustion-preventing heat-insulating power battery box and an automatic fire extinguishing device are necessary to be designed.
Disclosure of Invention
The invention provides a fire-proof heat-preservation power battery box and an automatic fire extinguishing device, which solve the technical problems and adopt the technical scheme that:
the utility model provides a prevent burning power battery box, includes power battery box body and power battery box lid the internal surface of power battery box body with the back of power battery box lid all is provided with high temperature resistant flame retardant coating, and high temperature resistant flame retardant coating adopts blanket form or cloth form fire prevention high temperature resistant material and slabby fire prevention high temperature resistant material, and specific blanket form fire prevention high temperature resistant material is aluminium silicate acupuncture ceramic fibre blanket, or cloth form fire prevention high temperature resistant material is fire-resistant ceramic fibre cloth, or slabby fire prevention high temperature resistant material is aluminium silicate ceramic fibre board, and high temperature resistant can reach more than 1000 degrees, and prevent open fire burning.
A combustion-proof heat-preservation power battery box comprises the combustion-proof power battery box, wherein a heat-preservation layer is arranged between the inner surface of a power battery box body and the back surface of a power battery box cover and a high-temperature-resistant fireproof layer, and a charging socket and a heat-preservation control switch are arranged on the power battery box body; heating element and temperature switch are still installed to the surface of the high temperature resistant flame retardant coating in the power battery box body, and heating element one end and temperature switch one end are connected, and the temperature switch other end and heat preservation control switch one end are connected, and the heat preservation control switch other end is connected with the positive pole of the socket that charges, and heating element's the other end and the negative pole of the socket that charges are connected.
As a further scheme of the technical scheme, the heat insulation material of the inner surface of the power battery box body and the heat insulation layer on the back surface of the power battery box cover is aluminum foil or aluminum foil heat insulation cotton or EPP foam, and the aluminum foil is high-temperature-resistant aluminum foil.
As a further scheme of the technical scheme, a thermistor is further installed on the outer surface of the high-temperature-resistant fireproof layer in the power battery box body, namely the surface closest to the power battery, one end of the thermistor is connected with the negative electrode of the charging socket, the other end of the thermistor is connected with a middle contact pin of the charging socket, and the thermistor is used for detecting the temperature in the power battery box by an intelligent charger or an electric vehicle controller, controlling the charging current in real time and preventing thermal runaway.
As a further scheme of the technical scheme, the power battery box cover is provided with an LED (light emitting diode) luminous tube or is directly LED out through a lead, the head of the lead is provided with the LED luminous tube, the anode of the LED luminous tube is connected with the connecting end of the heating element and the temperature switch, the cathode of the LED luminous tube is connected with the cathode of the charging socket through a resistor, when the heat preservation control switch is switched on and heating is started, the LED luminous tube is on, and therefore whether heating is carried out or not can be visually prompted.
As a further scheme of the technical scheme, the power battery box cover is provided with an exhaust hole and an exhaust hole plug.
As a technical scheme's further scheme, be provided with water pipe interface A on the power battery box lid, water pipe interface A one end is connected with water pipe A to set up the high temperature resistant flame retardant coating surface at the power battery box lid back, water pipe A head is provided with the shower nozzle, and this shower nozzle can be atomizing nozzle, power battery box lid is provided with firework detecting head and firework detection socket still on, and the socket is surveyed through electric wire connection to firework detecting head and firework.
As a further aspect of the technical solution, the temperature switch is a normally closed temperature switch.
An automatic fire extinguishing device for a fire-proof heat-preservation power battery box comprises a small water storage tank, a small submersible pump, a water pipe B and a fire extinguishing control module; the small submersible pump is arranged in the water storage tank, water is contained in the water storage tank, the small submersible pump is connected with one end of the water pipe B, the other end of the water pipe B is provided with the water pipe connector B, the water pipe connector B can be conveniently connected with a water pipe connector A on the cover of the power battery box, the connection mode can be connected in a common buckling mode, and quick connection is facilitated; the fire extinguishing control module comprises a smoke and fire detection module, a single chip microcomputer module, a submersible pump control module and a power supply module; the electric power battery box comprises a water storage tank, a water pump control module, a power module, a small submersible pump, a connection plug, a connection socket connector, a smoke and fire detection socket connector, a power adapter connector, a water pipe connector B, a smoke and fire detection socket connector, a single chip microcomputer module and a water tank, wherein the water tank is filled with water; still can be provided with bee calling organ in further automatic fire extinguishing device, bee calling organ passes through a drive circuit and is connected with single chip module, can in time report to the police when detecting there is fireworks.
According to the invention, the heat-insulating layers are arranged on the inner surface of the periphery of the anti-combustion heat-insulating battery box body and the cover, and the high-temperature-resistant fireproof layer is arranged outside the heat-insulating layers, so that the fire range can be effectively controlled within the range of the power battery box when the power battery is on fire, and the automatic fire extinguishing device is matched to effectively extinguish the fire and cool down in time, so that the anti-combustion heat-insulating battery box body is safer.
The battery box with the anti-combustion and heat-preservation functions can effectively separate cold air outside from air inside the power battery box, so that the temperature in the box body can be slowly reduced under the condition of not heating; the power battery box cover is provided with the exhaust hole and the exhaust hole plug, the exhaust hole plug is pulled out when charging, hydrogen generated in the electrochemical reaction of the storage battery can be conveniently and timely removed, the exhaust hole plug is plugged into the exhaust hole after charging is completed, so that heat can be better preserved, the temperature of the storage battery can be kept, hydrogen generated in the electrochemical reaction of the storage battery can be conveniently and timely removed, and safety accidents are avoided. When the device is used, the power battery is placed in the anti-combustion heat-preservation power battery box and is connected in series through the electric wire, then the positive pole of the power battery pack is connected with the positive pole of the charging socket, and the negative pole of the power battery pack is connected with the negative pole of the charging socket. If the weather enters winter, the temperature is lower than 25 ℃, the running distance of the electric vehicle is obviously reduced, at this time, if charging is needed, the heat preservation control switch can be firstly opened, at this time, the normally closed temperature switch is closed, the power battery supplies power to the heating element, the heating element generates heat, the temperature in the anti-combustion heat preservation power battery box rises, if the temperature is higher than the set temperature, the normally closed temperature switch can be opened, the heating element stops generating heat, along with the rise of the temperature in the anti-combustion heat preservation power battery box, the charging characteristic of the power battery is improved, at this time, the charging effect is good, when the electric vehicle is used, the heat preservation control switch can be firstly opened, at this time, the normally closed temperature switch is closed, the power battery supplies power to the heating element, the heating element generates heat, the temperature in the anti-combustion heat preservation power battery box rises, along with the rise of the, the riding is farther, and the electric energy required for heating is less due to the good heat preservation property of the anti-combustion heat preservation power battery box.
The invention has the beneficial effects that: the safety of the user in charging the power battery is guaranteed to the maximum extent, and meanwhile the defect that the running distance of the user using the electric bicycle is greatly shortened when the temperature is lower in winter can be overcome. Convenient use, obvious effect and low cost. It can also be used in other places where power batteries are used.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of the heating control electrical connection of the present invention.
FIG. 3 is a schematic diagram of the three-layer structure of the case of the present invention.
In the figure, 1, a power battery box body, 2, an exhaust hole on a cover of a power battery box, 3, an insulating layer, 4, an insulating control switch, 5, a charging socket, 6, a cover of the power battery box, 7, a normally closed temperature switch, 8, a heating element, 9, a power battery pack, 10, an LED luminous tube, 11, a resistor, 12, a middle contact pin of the charging socket, 13, a small water storage tank, 14, the outer surface of the power battery box, 15, the inner surface of the power battery box, 16, the outer surface of the insulating layer, 17, the outer surface of a high-temperature-resistant fireproof layer, 18, a small submersible pump, 19, a fire extinguishing control module, 20, a water pipe connector A, 21, a smoke and fire detecting socket, 22, a head nozzle of the water pipe A, 23.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, fig. 2, fig. 3:
a combustion-preventing heat-insulating power battery box comprises a power battery box body 1 and a power battery box cover 6, wherein heat insulating layers 3 are respectively arranged on the inner surface of the power battery box body 1 and the back surface of the power battery box cover 6, a charging socket 5 and a heat insulating control switch 4 are arranged on the power battery box body 6, an LED light emitting tube 10 is arranged on the power battery box cover, blanket-shaped fire-proof high-temperature-resistant materials are also arranged on the outer surface of the heat insulating layer 3 of the power battery box body and the outer surface of the heat insulating layer of the power battery box cover, and the blanket-shaped fire-proof high-temperature-resistant materials are aluminum silicate needle-punched ceramic fiber blankets; heating element 8 and closed type temperature switch 7 are still installed to the surface of the fire-resistant high temperature resistant material of power battery box internal blanket form, and heating element 8 one end and closed type temperature switch 7 one end are connected, and the closed type temperature switch 7 other end and the 4 one end connection of heat preservation control switch, the 4 other ends of heat preservation control switch and the anodal connection of socket 5 that charges, heating element 8's the other end and the negative pole of socket 5 that charges are connected.
The heat insulation material of the heat insulation layer 3 is high-temperature-resistant aluminum foil, and the cost performance is high.
The power battery box cover is provided with an LED (light emitting diode) luminous tube 10, the anode of the LED luminous tube is connected with the connecting end of the heating element 8 and the temperature switch 7, the cathode of the LED luminous tube is connected with the cathode of the charging socket through a resistor 11, and when the heat preservation control switch 4 is switched on and starts to heat, the LED luminous tube 10 is on.
And the power battery box cover 6 is provided with an exhaust hole 2 and an exhaust hole plug.
The outer surface of the blanket-shaped fireproof high-temperature-resistant material in the power battery box body is also provided with a thermistor, one end of the thermistor is connected with the negative electrode of the charging socket, the other end of the thermistor is connected with a middle contact pin of the charging socket, and the thermistor is used for detecting the temperature in the power battery box by an intelligent charger or an electric vehicle controller and controlling the charging current in real time.
Be provided with water pipe interface A20 on the power battery case lid, water pipe interface A20 one end is connected with water pipe A24 to set up the high temperature resistant flame retardant coating surface at the back of power battery case lid, water pipe A head is provided with shower nozzle 22, is the atomizer, power battery case lid is still last to be provided with fireworks detecting head and fireworks and surveys socket 21, and fireworks detecting head and fireworks survey socket 21 and pass through the connection of electric lines.
An automatic fire extinguishing device for a fire-proof heat-preservation power battery box comprises a small water storage tank 13, a small submersible pump 18, a water pipe B23 and a fire extinguishing control module 19; the small submersible pump 18 is arranged in the water storage tank 13, the water storage tank 13 is filled with water, the small submersible pump 18 is connected with one end of a water pipe B23, the other end of the water pipe B23 is provided with a water pipe connector B, the water pipe connector B can be conveniently connected with a water pipe connector A20 on the power battery box cover 6, the connection mode is in common buckle connection, and quick connection is facilitated; the fire extinguishing control module 19 comprises a smoke and fire detection module, a single chip microcomputer module, a submersible pump control module and a power supply module; the smoke and fire detection module, the submerged pump control module, the power module is respectively connected with the single chip microcomputer module, the submerged pump control module is connected with the small submersible pump 18, the smoke and fire detection module can be conveniently connected with a smoke and fire detection socket 21 on the power battery box cover 6 through a connecting plug, the power supply of the power module can be converted by mains supply through a power adapter, a water pipe connector B and a water pipe connector A20 on the power battery box cover are connected when a power battery is charged, the connecting plug of the smoke and fire detection module is connected with the smoke and fire detection socket 21 on the power battery box cover, when smoke and fire are detected in the power battery box, the single chip microcomputer module can start the single chip microcomputer module 18, the submerged pump water in the water storage tank is sprayed to a battery on fire, and the submerged pump water; still can be provided with bee calling organ in further automatic fire extinguishing device, bee calling organ passes through a drive circuit and is connected with single chip module, can in time report to the police when detecting there is fireworks.
The principles and design features of this invention may be understood by the foregoing examples. The invention has the characteristics of low cost, practicability, reliability and higher economic benefit and social benefit.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (10)
1. The utility model provides a prevent burning power battery case which characterized in that: the power battery box comprises a power battery box body and a power battery box cover, wherein a high-temperature-resistant fireproof layer is arranged on the inner surface of the power battery box body and the back of the power battery box cover.
2. The flame-resistant power cell cartridge of claim 1, wherein: the high-temperature-resistant fireproof layer is made of blanket-shaped or cloth-shaped fireproof high-temperature-resistant materials and plate-shaped fireproof high-temperature-resistant materials, the blanket-shaped fireproof high-temperature-resistant materials are aluminum silicate needled ceramic fiber blankets, or the cloth-shaped fireproof high-temperature-resistant materials are fireproof ceramic fiber cloth, or the plate-shaped fireproof high-temperature-resistant materials are aluminum silicate ceramic fiber boards.
3. The utility model provides a prevent burning heat preservation power battery case which characterized in that: the anti-combustion power battery box comprises the anti-combustion power battery box body as claimed in claim 1 or claim 2, wherein an insulating layer is arranged between the inner surface of the power battery box body and the back surface of the power battery box cover and the high-temperature-resistant fireproof layer, and a charging socket and an insulating control switch are arranged on the power battery box body; heating element and temperature switch are still installed to the surface of the high temperature resistant flame retardant coating in the power battery box body, and heating element one end and temperature switch one end are connected, and the temperature switch other end and heat preservation control switch one end are connected, and the heat preservation control switch other end is connected with the positive pole of the socket that charges, and heating element's the other end and the negative pole of the socket that charges are connected.
4. The flame-resistant heat-insulating power battery case according to claim 3, wherein: and a thermistor is further mounted on the outer surface of the high-temperature-resistant fireproof layer in the power battery box body, one end of the thermistor is connected with the negative electrode of the charging socket, and the other end of the thermistor is connected with a middle contact pin of the charging socket.
5. The flame-resistant heat-insulating power battery case according to claim 3, wherein: the power battery box cover is provided with an LED luminous tube or is directly LED out through a lead, the head of the lead is provided with the LED luminous tube, the anode of the LED luminous tube is connected with the connecting end of the heating element and the temperature switch, and the cathode of the LED luminous tube is connected with the cathode of the charging socket through a resistor.
6. The flame-resistant heat-insulating power battery case according to claim 3, wherein: and the power battery box cover is provided with an exhaust hole and an exhaust hole plug.
7. The flame-resistant heat-insulating power battery case according to claim 3, wherein: the temperature switch is a normally closed temperature switch.
8. The flame-resistant power cell cartridge of claim 1 or claim 2, or the flame-resistant insulated power cell cartridge of claim 3, wherein: the power battery box cover on be provided with water pipe connection A, water pipe connection A one end is connected with water pipe A to set up the high temperature resistant flame retardant coating surface at the power battery box cover back, water pipe A head is provided with the shower nozzle, power battery box cover is still gone up and is provided with firework detecting head and firework and surveys the socket, the socket is surveyed through connection of electric lines to firework detecting head and firework.
9. The utility model provides an automatic fire extinguishing device for preventing burning heat preservation power battery box which characterized in that: the fire extinguishing device comprises a small water storage tank, a small submersible pump, a water pipe B and a fire extinguishing control module; the small submersible pump is arranged in a water storage tank, the water storage tank is filled with water, the small submersible pump is connected with one end of a water pipe B, the other end of the water pipe B is provided with a water pipe connector B, and the water pipe connector B can be conveniently connected with a water pipe connector A on the cover of the power battery box in claim 8; the fire extinguishing control module comprises a smoke and fire detection module, a single chip microcomputer module, a submersible pump control module and a power supply module; smoke and fire detection module, dive pump control module, power module are connected with single chip module respectively, dive pump control module and small-size immersible pump are connected, smoke and fire detection module can be conveniently connected with the smoke and fire detection socket on the power battery box lid through the wiring plug, power module's power supply can pass through the power adapter conversion with the commercial power, connect water pipe head B and the water pipe interface A on the power battery box lid when power battery charges, smoke and fire detection module's wiring plug and claim 8 the smoke and fire detection socket on the power battery box lid connect.
10. The automatic fire extinguishing apparatus for a fire-preventing heat-insulating power battery pack according to claim 9, characterized in that: the automatic water spraying fire extinguishing device is also internally provided with a buzzer, and the buzzer is connected with the singlechip module through a driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213082.7A CN112909408A (en) | 2019-12-02 | 2019-12-02 | Anti-combustion heat preservation power battery case and automatic fire extinguishing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911213082.7A CN112909408A (en) | 2019-12-02 | 2019-12-02 | Anti-combustion heat preservation power battery case and automatic fire extinguishing device |
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| CN112909408A true CN112909408A (en) | 2021-06-04 |
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| CN201911213082.7A Pending CN112909408A (en) | 2019-12-02 | 2019-12-02 | Anti-combustion heat preservation power battery case and automatic fire extinguishing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI816427B (en) * | 2022-06-08 | 2023-09-21 | 許竣翔 | Cooling and fire extinguishing device for electric storage system |
-
2019
- 2019-12-02 CN CN201911213082.7A patent/CN112909408A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI816427B (en) * | 2022-06-08 | 2023-09-21 | 許竣翔 | Cooling and fire extinguishing device for electric storage system |
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