CN219815080U - Combined fire detection alarm device for vehicle-mounted battery compartment - Google Patents
Combined fire detection alarm device for vehicle-mounted battery compartment Download PDFInfo
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- CN219815080U CN219815080U CN202222763879.8U CN202222763879U CN219815080U CN 219815080 U CN219815080 U CN 219815080U CN 202222763879 U CN202222763879 U CN 202222763879U CN 219815080 U CN219815080 U CN 219815080U
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- alarm device
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 230000006978 adaptation Effects 0.000 claims abstract description 7
- 238000003860 storage Methods 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 14
- 239000000779 smoke Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000017525 heat dissipation Effects 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000009702 powder compression Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 description 5
- 230000002588 toxic effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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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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- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a vehicle-mounted battery compartment composite fire detection alarm device, which is formed integrally in the production stage of an automobile by combining a detection alarm device with an upper cover of a battery compartment, so that the problems of difficult adaptation between external equipment and automobiles of different brands, reduced monitoring sensitivity and delayed alarm are solved, and the situations that the external equipment is not firmly fixed and the battery compartment is easy to move and damage are avoided; the anti-collision deformation device is adopted, so that the failure caused by deformation of the detection alarm device under the conditions of strong jolt and severe collision is effectively avoided; the multifunctional pipeline not only plays a role in supporting the reinforcing ribs, but also is arranged in a 'groined' shape, so that the battery compartment is monitored more accurately, the time delay is reduced, the reaction is sensitive, and the fire extinguishing covering effect is good; the escape controller is adopted, so that the vehicle window can be automatically lifted and fallen under the condition of battery combustion or explosion, and the escape of personnel is facilitated; and a standby power supply is adopted, so that the endurance of the detection alarm device is prolonged.
Description
Technical Field
The utility model relates to the field of vehicle-mounted battery safety, in particular to a vehicle-mounted battery compartment composite fire detection alarm device.
Background
The new energy is widely applied to various fields, in recent years, the market of new energy automobiles is larger and more, the safety problem of vehicle-mounted batteries is not ignored, and the lithium batteries are widely applied to the new energy automobiles due to the advantages of high energy density, long service life, light weight, small volume, low self-discharge rate and no pollution. However, the defects are also obvious, the heat productivity is great during charging and discharging, the stability is relatively poor, the fire and even explosion are easy to happen after the charging, the short circuit and the extrusion are carried out by external impact, the combustion is rapid and violent, the combustion temperature is high, a large amount of toxic and harmful gases are generated, and the service life is easy to be influenced by the charging and the discharging.
In the prior art, the state of the vehicle-mounted battery is monitored and early-warned by adopting an external independent single-body battery warning device, but manufacturers of the external single-body battery warning device are good and bad, and the situation of being not matched with a battery compartment of an automobile often exists, so that the time delay and failure situations can occur in the monitoring and warning process, the monitoring and warning reaction is not accurate and sensitive enough, the external single-body battery warning device cannot be firmly and reliably fixed with the battery compartment, the displacement situation can exist in the using process, and the problem of damaging the internal and external morphological stability of the battery compartment exists. Particularly, under the conditions of jolt, severe collision and the like, deformation is easy to occur, so that failure is caused. Because the lithium battery burns and can produce high temperature and a large amount of poisonous and harmful gas, the life health safety of drivers and passengers is not facilitated, the existing external single-body battery alarm device is not provided with a corresponding personnel escape device, and personnel escape is not facilitated when the battery explodes. The current external monomer formula battery alarm device supplies power through the on-vehicle battery, but the long-term use of stopping of car, external monomer formula battery alarm device continuously consumes the electric energy of on-vehicle battery, can cause the overdischarge of on-vehicle battery, influences the life of battery. Some manufacturers set an external battery alarm device to be used within three days of parking, however, once the vehicle is parked for more than three days, the alarm monitoring function of the vehicle-mounted battery in the parking state is lost. Uninterrupted alarm monitoring on the battery cannot be realized, and potential safety hazards generated by the vehicle-mounted battery under the condition of overlong parking time cannot be further avoided.
Disclosure of Invention
In order to solve the problems, the utility model provides the vehicle-mounted battery compartment composite fire detection alarm device, which can be integrally formed in the production stage of an automobile by combining the detection alarm device with the upper cover of the battery compartment, so that the problems of difficult adaptation of external equipment and automobiles of different brands, reduced monitoring sensitivity and delayed alarm are solved, and the situations of unstable fixation of the external equipment and easy movement and damage to the battery compartment are avoided. Through crashproof deformation device, effectively avoid under the condition of strong jolt and violent collision, detection alarm device takes place deformation and became invalid, and multi-functional pipeline has not only played the supporting role of strengthening rib, accurate to the monitoring of battery compartment, and the response is sensitive, covers effectually. The escape controller is arranged, so that under the condition of battery combustion or explosion, the vehicle window can be automatically lifted and locked, the driver and the passengers can be reduced or prevented from inhaling toxic and harmful gases, and the escape of the passengers is facilitated. Through stand-by power supply, the duration of extension detection alarm device has avoided the overdischarge of on-vehicle battery under the parking state, extension on-vehicle battery life.
In order to achieve the technical purpose and the technical effect, the utility model is realized by the following technical scheme: the utility model provides a vehicle-mounted battery compartment combined type fire detection alarm device, includes the battery compartment, and the battery compartment is built-in to have a plurality of battery packs, still includes multi-functional pipeline, multi-functional pipeline is located the inboard of battery compartment upper cover, by be close to battery compartment upper cover border and battery compartment upper cover shape adaptation's closed main circulating pipe and distribute in main circulating pipe inboard and main circulating pipe mutually the branch circulating pipe that is "well" font of intercommunication, evenly distributed has a plurality of fire extinguishing orifice and sensor group on branch circulating pipe and the main circulating pipe, the main circulating pipe outside is connected with crashproof deformation device, crashproof deformation device is closely adapted with the corner in the battery compartment upper cover outside, battery compartment upper cover inside still is provided with control storage device and stand-by power supply.
Further, the branch circulation pipes are axisymmetrically distributed, the middle of the branch circulation pipe is rectangular, each vertex angle of the rectangle diverges 1 branch circulation pipe which is connected with the main circulation pipe in the vertical direction and 1 branch circulation pipe which is connected with the main circulation pipe in the horizontal direction, the branch circulation pipes in the vertical direction are gradually far away from the vertical shaft of the upper cover of the battery compartment along the direction of the main circulation pipe, and the branch circulation pipes in the horizontal direction are gradually close to the horizontal shaft of the upper cover of the battery compartment along the direction of the main circulation pipe.
Further, the anti-collision deformation devices are axisymmetrically distributed and form an included angle with the side edge of the upper surface of the upper cover of the battery compartment.
Further, the control storage device is electrically connected with the battery pack in the battery compartment, and is also electrically connected with the standby power supply.
Further, the control storage device comprises a control device and a storage device, wherein the control device comprises a sensor controller, an audible and visual alarm and an escape controller, and the storage device comprises a fire extinguishing substance storage device and a fire extinguishing gas storage device.
Further, the escape controller comprises a lock lifting controller and a window falling controller.
Further, the sensor group comprises a temperature sensor, a pressure sensor and a smoke sensor, and is electrically connected with the control storage device.
Further, the fire extinguishing spray hole is a normally closed fire extinguishing spray hole.
Further, the fire extinguishing substance storage device is a dry powder compression fire extinguishing device, and the fire extinguishing gas storage device is an inert gas compression fire extinguishing device.
Further, the side wall and the bottom of the battery compartment are provided with heat dissipation holes.
The beneficial effects of the utility model are as follows:
1. the detection alarm device and the battery compartment upper cover are combined, so that the detection alarm device and the battery compartment upper cover can be integrally formed in the automobile production stage, the problems of difficult adaptation of external equipment and automobiles of different brands, reduced monitoring sensitivity and delayed alarm are solved, and the situations that the external equipment is not firmly fixed and the battery compartment is easily damaged by movement are avoided;
2. the anti-collision deformation device is adopted, so that the failure caused by deformation of the detection alarm device under the conditions of strong jolt and severe collision is effectively avoided;
3. the multifunctional pipeline has the advantages that the multifunctional pipeline not only plays a role in supporting the reinforcing ribs, but also is anti-collision and deformation, the 'well' -shaped pipeline is adopted, the monitoring on the battery bin is more accurate, the time delay is reduced, the reaction is sensitive, and the fire extinguishing covering effect is good;
4. the escape controller is adopted, so that under the condition of battery combustion or explosion, the vehicle window can be automatically lifted and locked, the driver and the passengers can be reduced or prevented from inhaling toxic and harmful gases, and the escape of the passengers is facilitated;
5. the standby power supply is adopted, the endurance of the detection alarm device is prolonged, the overdischarge of the vehicle-mounted battery in a parking state is avoided, the service life of the vehicle-mounted battery is prolonged, the vehicle-mounted battery can be charged through an external USB interface, the power is low, the safety coefficient is high, and the vehicle-mounted battery can be detected and pre-warned under the condition of long parking time.
Drawings
FIG. 1 is a block diagram of a battery compartment and a battery pack;
FIG. 2 is a horizontal cross-sectional view of the battery compartment top cover;
FIG. 3 is a bottom view of the battery compartment top cover;
fig. 4 is a perspective view of the battery compartment top cover.
The device comprises a 1-battery compartment, a 2-battery pack, a 3-heat dissipation hole, a 4-battery compartment upper cover, a 5-anti-collision deformation device, a 6-multifunctional pipeline, a 61-main circulating pipe, a 62-branch circulating pipe, 7-fire extinguishing spray holes, 8-sensor groups, a 9-control storage device and a 10-standby power supply.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to fig. 1-4 so that the advantages and features of the present utility model can be more readily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
The utility model provides a vehicle-mounted battery compartment combined type fire detection alarm device, as shown in fig. 1, including battery compartment 1, battery compartment embeds a plurality of battery packs 2, the lateral wall and the bottom of battery compartment 1 are equipped with louvre 3, as shown in fig. 3, still include multi-functional pipeline 6, multi-functional pipeline 6 is located the inboard of battery compartment upper cover 4, by being close to battery compartment upper cover 4 border and battery compartment upper cover 4 shape adaptation's closed main circulating pipe 61 and distribute in main circulating pipe 61 inboard and main circulating pipe 61 intercommunication be the branch circulating pipe 62 of "well" font, branch circulating pipe 62 is axisymmetric distribution, the centre is the rectangle, every apex angle of rectangle all diverges 1 vertical direction, 1 branch circulating pipe 62 that is connected with main circulating pipe 61 of horizontal direction, branch circulating pipe 62 in vertical direction is gradually kept away from the vertical axis of battery compartment upper cover 4 along main circulating pipe 61 direction, branch circulating pipe 62 in horizontal direction is close to the horizontal axis of battery compartment upper cover 4 gradually along main circulating pipe 61 direction. Through this kind of branch circulating pipe 62 that has certain contained angle for support better, the atress is more even, lightens battery compartment upper cover 4 and takes place deformation under the circumstances that receives external force striking or extrusion, and set up with "well" font pipeline, evenly distributed has a plurality of fire extinguishing orifice 7 and sensor group 8 on branch circulating pipe 62 and the main circulating pipe 61, as shown in fig. 2, make control storage device 9 more accurate to the monitoring in the battery compartment 1, reduce the time delay, the response is sensitive, and the coverage effect of putting out a fire is good, can put out a fire through fire extinguishing orifice release fire extinguishing material in the shorter time, such as dry powder mixed inert gas puts out a fire. The smoke particles generated after fire extinguishment can be discharged through the heat dissipation holes 3.
The outside of the main circulation pipe 61 is connected with the anti-collision deformation device 5, the anti-collision deformation device 5 is tightly matched with the corners of the outside of the upper cover 4 of the battery compartment, the anti-collision deformation device 5 is axisymmetrically distributed, and an included angle is formed between the anti-collision deformation device 5 and the side edge of the upper surface of the upper cover 4 of the battery compartment. The anti-collision deformation device 5 and the outer side of the battery compartment upper cover 4 form a triangular stress edge, so that the structure is more stable, and external collision can be effectively resisted. The anti-collision deformation device 5 is connected and matched with the multifunctional composite pipeline 6, so that the clamping protection of the battery compartment upper cover 4 is realized from the inner side and the outer side, and the anti-collision and anti-deformation effects are enhanced.
The battery compartment upper cover 4 is also internally provided with a control storage device 9 and a standby power supply 10. The upper cover 4 of the outer battery compartment of the control storage device 9 and the standby power supply 10 is provided with a heat insulation layer. The control storage device 9 is electrically connected with the battery pack 2 in the battery compartment 1, and the control storage device 9 is also electrically connected with the standby power supply 10. Under the normal condition, the battery pack 2 is adopted to control the storage device 9 to supply power under the condition that the using process and the parking time of the automobile are shorter, and when the automobile is not used for a long time and the parking time is too long, the standby power supply is used for supplying power, the endurance of the detection alarm device is prolonged, the overdischarge of the vehicle-mounted battery in a parking state is avoided, the service life of the vehicle-mounted battery is prolonged, the standby power supply is charged through the USB interface externally connected with the automobile, the power is low, the safety coefficient is high, and the uninterrupted detection and the early warning of the vehicle-mounted battery can be ensured under the condition that the parking time is longer.
The control storage device 9 comprises a control device and a storage device, wherein the control device comprises a sensor controller, an audible and visual alarm and an escape controller, and the storage device comprises a fire extinguishing substance storage device and a fire extinguishing gas storage device. The escape controller comprises a lifting lock controller and a window falling controller. The escape controller is electrically connected with the lifting lock device and the window lifting device of the automobile, can control and automatically lift the lock and drop the window under the condition of battery combustion or explosion, reduces or avoids the driver and passengers from inhaling toxic and harmful gases, and is convenient for the personnel to escape. The sensor group 8 comprises a temperature sensor, a pressure sensor and a smoke sensor, and the sensor group 8 is electrically connected with the control storage device 9. The fire extinguishing jet orifice 7 is a normally closed fire extinguishing jet orifice. When the battery pack is abnormal, the temperature sensor can detect the abnormality of the temperature in the battery compartment, the pressure sensor senses the pressure change of the battery pack, the smoke sensor can detect smoke gas generated when the battery burns, signals are transmitted to the control storage device 9 through the sensor groups 8, the sensor controller in the control storage device 9 sends out signals, the audible and visual alarm and the escape controller are enabled to be started, the audible and visual alarm controls the automobile to carry out audible and visual alarm, and the escape controller controls the automobile to automatically lift and lock and fall down the automobile window. The sensor controller simultaneously sends signals to the storage device, the fire extinguishing substance storage device and the fire extinguishing gas storage device in the storage device are activated and started, fire extinguishing substances such as dry powder and fire extinguishing gas such as nitrogen are released under pressure, circulation diffusion is carried out between the branch circulation pipe 62 and the main circulation pipe 61, and fire extinguishing spray holes are opened by the pressure, so that fire extinguishing with better coverage is uniformly sprayed on the battery pack 2. The smoke particles generated after fire extinguishment can be discharged through the heat dissipation holes 3.
The scheme adopts a mode of combining the detection alarm device with the upper cover of the battery compartment, can be integrally formed in the production stage of the automobile, solves the problems of difficult adaptation of external equipment and automobiles of different brands, reduced monitoring sensitivity and delayed alarm, and also avoids the conditions that the external equipment is not firmly fixed and the battery compartment is easy to move and damage; the anti-collision deformation device is adopted, so that the failure caused by deformation of the detection alarm device under the conditions of strong jolt and severe collision is effectively avoided; the multifunctional pipeline has the advantages that the multifunctional pipeline not only plays a role in supporting the reinforcing ribs, but also is anti-collision and deformation, the 'well' -shaped pipeline is adopted, the monitoring on the battery bin is more accurate, the time delay is reduced, the reaction is sensitive, and the fire extinguishing covering effect is good; the escape controller is adopted, so that under the condition of battery combustion or explosion, the vehicle window can be automatically lifted and locked, the driver and the passengers can be reduced or prevented from inhaling toxic and harmful gases, and the escape of the passengers is facilitated; the standby power supply is adopted, the endurance of the detection alarm device is prolonged, the overdischarge of the vehicle-mounted battery in a parking state is avoided, the service life of the vehicle-mounted battery is prolonged, the vehicle-mounted battery can be charged through an external USB interface, the power is low, the safety coefficient is high, and the vehicle-mounted battery can be detected and pre-warned under the condition of long parking time.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (10)
1. The utility model provides a vehicle-mounted battery compartment combined type fire detection alarm device, including the battery compartment, the battery compartment embeds a plurality of battery packs, its characterized in that still includes multi-functional pipeline, multi-functional pipeline is located the inboard of battery compartment upper cover, by be close to the battery compartment upper cover border with battery compartment upper cover shape adaptation closed main circulating pipe and distribute in main circulating pipe inboard and main circulating pipe intercommunication be "well" style of calligraphy branch circulating pipe each other, branch circulating pipe and main circulating pipe are last evenly distributed have a plurality of fire extinguishing orifice and sensor group, main circulating pipe outside is connected with crashproof deformation device, crashproof deformation device is closely adapted with the corner in the battery compartment upper cover outside, battery compartment upper cover inside still is provided with control storage device and stand-by power supply.
2. The vehicle-mounted battery compartment composite fire detection alarm device according to claim 1, wherein the branch circulation pipes are axisymmetrically distributed, the middle of the branch circulation pipe is rectangular, each vertex angle of the rectangle diverges 1 branch circulation pipe which is connected with the main circulation pipe in the vertical direction and 1 branch circulation pipe in the horizontal direction, the branch circulation pipe in the vertical direction is gradually far away from the vertical shaft of the upper cover of the battery compartment along the direction of the main circulation pipe, and the branch circulation pipe in the horizontal direction is gradually close to the horizontal shaft of the upper cover of the battery compartment along the direction of the main circulation pipe.
3. The vehicle-mounted battery compartment composite fire detection alarm device according to claim 1, wherein the anti-collision deformation devices are axisymmetrically distributed and form an included angle with the side edge of the upper surface of the battery compartment upper cover.
4. The vehicle battery compartment combined fire detection and alarm device according to claim 1, wherein the control storage device is electrically connected to the battery pack in the battery compartment, and the control storage device is further electrically connected to the backup power supply.
5. The vehicle-mounted battery compartment composite fire detection alarm device according to claim 1, wherein the control storage device comprises a control device and a storage device, wherein the control device comprises a sensor controller, an audible and visual alarm and an escape controller, and the storage device comprises a fire extinguishing substance storage device and a fire extinguishing gas storage device.
6. The vehicle battery compartment composite fire detection alarm device of claim 5, wherein the escape controller comprises a lift lock controller and a window-falling controller.
7. The vehicle battery compartment combined fire detection alarm device of claim 1, wherein the sensor group comprises a temperature sensor, a pressure sensor, a smoke sensor, and the sensor group is electrically connected with the control storage device.
8. The vehicle battery compartment composite fire detection alarm device of claim 1, wherein the fire extinguishing orifice is a normally closed fire extinguishing orifice.
9. The vehicle-mounted battery compartment composite fire detection alarm device according to claim 5, wherein the fire extinguishing substance storage device is a dry powder compression fire extinguishing device, and the fire extinguishing gas storage device is an inert gas compression fire extinguishing device.
10. The vehicle-mounted battery compartment composite fire detection alarm device according to claim 1, wherein the side wall and the bottom of the battery compartment are provided with heat dissipation holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222763879.8U CN219815080U (en) | 2022-10-20 | 2022-10-20 | Combined fire detection alarm device for vehicle-mounted battery compartment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222763879.8U CN219815080U (en) | 2022-10-20 | 2022-10-20 | Combined fire detection alarm device for vehicle-mounted battery compartment |
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| Publication Number | Publication Date |
|---|---|
| CN219815080U true CN219815080U (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222763879.8U Active CN219815080U (en) | 2022-10-20 | 2022-10-20 | Combined fire detection alarm device for vehicle-mounted battery compartment |
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| Country | Link |
|---|---|
| CN (1) | CN219815080U (en) |
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2022
- 2022-10-20 CN CN202222763879.8U patent/CN219815080U/en active Active
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