CN210384641U - Miniature fire extinguishing device of rechargeable battery pack - Google Patents
Miniature fire extinguishing device of rechargeable battery pack Download PDFInfo
- Publication number
- CN210384641U CN210384641U CN201920878689.6U CN201920878689U CN210384641U CN 210384641 U CN210384641 U CN 210384641U CN 201920878689 U CN201920878689 U CN 201920878689U CN 210384641 U CN210384641 U CN 210384641U
- Authority
- CN
- China
- Prior art keywords
- fire extinguishing
- battery pack
- rechargeable battery
- cylinder body
- spray holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 51
- 239000007921 spray Substances 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims description 11
- 239000000443 aerosol Substances 0.000 claims description 6
- 239000000779 smoke Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Landscapes
- Battery Mounting, Suspending (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The utility model discloses a miniature fire extinguishing device of a rechargeable battery pack, which comprises a cylinder body arranged between the side walls of each battery in the battery pack and a cylinder cover arranged at one end of the cylinder body, wherein a columnar fire extinguishing agent is arranged in the cylinder body, the end part of the columnar fire extinguishing agent is provided with an ignition device, and the surface of the cylinder body is provided with a plurality of spray holes; the utility model discloses under the prerequisite that the extinguishing device is used for rechargeable battery group dwindles, guarantee the efficiency of putting out a fire and install the security simultaneously.
Description
Technical Field
The utility model relates to a fire control technical field specifically indicates a microminiature extinguishing device of rechargeable battery group.
Background
The extinguishing device of present rechargeable battery group is generally outside at the group battery, and extinguishing device spouts the fire extinguishing agent when the battery takes place to burn, puts out a fire to the group battery from the outside, and the material of putting out a fire when putting out a fire to the battery like this can be because the heat in group battery clearance is great and make the material of putting out a fire difficult to reach inside the group battery, but can restrain the conflagration in short-term but can't reach the purpose of putting out a fire.
Because the rechargeable battery pack is provided with the shell, whether the inside of the shell generates heat and burns or smoldering is difficult to observe from the outside, in addition, the space inside the shell of the rechargeable battery pack is usually very narrow, the fire extinguishing device on the market cannot be installed inside to protect the devices, small fires are often noticed by people after becoming large fires, but the battery pack is seriously damaged at this moment, and even the detonation phenomenon directly occurs.
The fire extinguishing device with reduced volume is directly used in a rechargeable battery pack and often faces a lot of problems, such as insufficient energy efficiency after the volume is reduced, the fire can not be extinguished, the temperature is reduced, or the pressure is suddenly increased when the fire extinguisher with smaller volume is sprayed, so that the technical problem to be solved urgently is how to ensure the fire extinguishing energy efficiency and the safety of the device on the premise that the fire extinguishing device is used in the rechargeable battery pack.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned not enough, provide a micro-miniature extinguishing device of rechargeable battery group, under the prerequisite that the extinguishing device is used for rechargeable battery group dwindles, guarantee the efficiency of putting out a fire and install the security simultaneously.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: a miniature fire extinguishing device for rechargeable battery pack comprises a cylinder body arranged between the side walls of each battery in the battery pack and a cylinder cover positioned at one end of the cylinder body, wherein a columnar fire extinguishing agent is arranged in the cylinder body, an ignition device is arranged at the end part of the columnar fire extinguishing agent, and a plurality of spray holes are formed in the surface of the cylinder body.
Preferably, the ignition device is an electric ignition head structure, and a fire detection module is further arranged in the battery pack and is connected with the control end of the ignition device through a microprocessor.
Preferably, the fire detection module comprises a temperature sensor and/or a smoke sensor.
Preferably, the ignition device is of a fuse structure, the cylinder body is detachably connected with the cylinder cover, and the columnar fire extinguishing agent is an aerosol fire extinguishing agent.
Preferably, the battery pack includes an upper frame and a lower frame, both ends of the battery being mounted on the upper frame and the lower frame, respectively; the upper frame and the lower frame are both provided with limiting grooves, limiting blocks are arranged on the outer side of the cylinder cover and the outer side of the cylinder body, and the limiting blocks are matched with the limiting grooves.
Preferably, the plurality of spray holes are linearly distributed on one side surface of the cylinder, and the columnar fire extinguishing agent in the cylinder blocks the spray holes.
Preferably, the plurality of spray holes are distributed in a straight line from one end close to the ignition device to one end far away from the ignition device, and the diameters of the spray holes are gradually reduced.
Preferably, the nozzle hole faces in the direction of the gap between the cells.
Preferably, the cylinder body is a hollow cylinder structure with one closed end and the other open end, the diameter of the cylinder body is 5-20mm, and the height of the cylinder body is 20-60 mm.
In addition, the utility model discloses still relate to above-mentioned extinguishing device's fire extinguishing method, it includes following step:
step 1): when a fire disaster happens, a fire point detection module in the battery pack detects a fire point and transmits a signal to a microprocessor, and the microprocessor controls an ignition device to start and ignite the columnar fire extinguishing agent;
step 2): the columnar fire extinguishing agent is gradually ignited from the ignition end to the other end, and the fire extinguishing agent is gradually released;
step 3): the fire extinguishing agent is firstly sprayed out from the spray holes close to the ignition device, and the spray holes blocked by the columnar fire extinguishing agent are gradually opened in the spraying process;
step 4): the fire extinguishing agent is gradually sprayed out to the spray holes far away from the ignition device, and the fire extinguishing agent is released to the gaps among the batteries to extinguish the fire.
The utility model has the advantages that:
1. the volume of the fire extinguishing device is far smaller than that of the existing fire extinguishing device, the volume can be lower than 2000 cubic millimeters, the fire extinguishing device can be conveniently installed inside a rechargeable battery pack, and fire extinguishing efficiency and device safety are guaranteed simultaneously on the premise that the fire extinguishing device is used for the rechargeable battery pack.
2. The diameter of the spray hole from the end close to the ignition device to the end far away from the ignition device is smaller and smaller, when the ignition device ignites, because the combustion space in the cylinder is smaller, the pressure in the cylinder increases suddenly after the surface layer of the columnar fire extinguishing agent close to the ignition device is combusted and gasified, if the caliber of the spray hole is smaller, the danger of explosion is faced, the diameter of the spray hole is larger as the distance from the ignition device is closer, and after the columnar fire extinguishing agent is gradually ignited, the combustion space in the cylinder is larger, and at the moment, if the caliber of the spray hole is too large, the spraying distance of the solid fire extinguishing agent is limited, so that the; the arrangement mode of the spray holes can ensure the fire extinguishing efficiency and the safety of the device at the same time.
3. The inside non-pressure state that is of fire extinguishing agent storage part the utility model discloses the non-pressure of saying is the pressure related to current prior art, and fire extinguishing agent storage part is inside to have no pressure differential with the outside promptly, even have pressure differential also can be neglected, and it does benefit to the long-term storage of fire extinguishing agent, for current extinguishing device (having the pressure state) 12 to 24 months's storage period, the utility model discloses extinguishing device (non-pressure state) extend to more than 60 months.
4. The fire extinguishing agent is filled in the cylinder body, so that a plurality of or all spray holes on the cylinder body are blocked when the fire extinguishing device is not started, after the ignition device is started, the fire extinguishing agent is gradually reduced, the spray holes are gradually opened, the internal pressure of the device is ensured not to be suddenly increased, and the fire is continuously extinguished.
5. The cylinder body can be made of metal materials, and is convenient to recycle.
Drawings
FIG. 1 is a schematic view showing a state of use of a miniature fire extinguishing apparatus of a rechargeable battery pack;
FIG. 2 is a schematic structural view of a nozzle of the fire extinguishing apparatus facing the direction of a gap between batteries;
FIG. 3 is another schematic diagram of the fire extinguishing apparatus with the nozzle holes facing the gap between the batteries;
FIG. 4 is a schematic view of the fire suppression apparatus of FIG. 1;
FIG. 5 is a schematic structural view of the ignition device in the configuration of a fuse;
FIG. 6 is a schematic structural view showing a plurality of nozzles arranged in a straight line on one side of a cylinder;
FIG. 7 is another schematic structural diagram of a plurality of spray holes distributed in a straight line on one side surface of a cylinder body;
in the figure, a battery pack 1, a battery 1.1, an upper frame 1.2, a lower frame 1.3, a cylinder body 2, a cylinder cover 3, a columnar fire extinguishing agent 4, an ignition device 5, a spray hole 6, a fire point detection module 7 and a limiting block 8.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1 to 7, a miniature fire extinguishing apparatus for rechargeable battery pack comprises a cylinder 2 disposed between the side walls of each battery 1.1 in the battery pack 1 and a cylinder cover 3 disposed at one end of the cylinder 2, wherein a columnar fire extinguishing agent 4 is disposed in the cylinder 2, an ignition device 5 is disposed at the end of the columnar fire extinguishing agent 4, and a plurality of spray holes 6 are disposed on the surface of the cylinder 2. The ignition device 5 may be provided at one end or both ends of the columnar fire extinguishing agent 4, and the ignition device 5 is provided only at one end of the columnar fire extinguishing agent 4 in this embodiment.
Preferably, the ignition device 5 is an electric ignition head structure, and a fire detection module 7 is further arranged in the battery pack 1, wherein the fire detection module 7 is connected with the control end of the ignition device 5 through a microprocessor.
Preferably, said fire detection module 7 comprises a temperature sensor and/or a smoke sensor. Temperature sensor can detect the inside temperature situation of group battery 1, and smoke transducer can detect the inside situation that produces smog of group battery 1, if take place unusually, temperature sensor and smoke transducer can give microprocessor with signal transmission, and then microprocessor can control ignition 5 and start, and then ignite column fire extinguishing agent 4, carries out the automatic fire extinguishing process after the release fire extinguishing agent. The microprocessor in this embodiment can select 51 singlechips for use, and the model is 80C51 singlechips, or selects STM32 microprocessor for use, and the model is STM32F 103.
In addition, preferably, the ignition device 5 can also adopt a fire cable structure, the cylinder body 2 is detachably connected with the cylinder cover 3, and the columnar fire extinguishing agent 4 is aerosol fire extinguishing agent. In this embodiment, the ignition device 5 is in a fuse structure (as shown in fig. 5), and one end of the fuse can be directly connected to the end of the columnar fire extinguishing agent 4, and the other end of the fuse is arranged outside the cylinder 2, so that the fuse can be ignited when a fire breaks out from the outside, and the columnar fire extinguishing agent 4 can be ignited. In addition, as shown in fig. 4, the connection may be a threaded connection, but the embodiment is not limited to this connection, and may also be a detachable connection, such as a pin connection.
Preferably, as shown in fig. 1, the battery pack 1 includes an upper frame 1.2 and a lower frame 1.3, and both ends of the battery 1.1 are mounted on the upper frame 1.2 and the lower frame 1.3, respectively; the upper frame 1.2 and the lower frame 1.3 are provided with limit grooves, the outer side of the cylinder cover 3 and the outer side of the cylinder body 2 are provided with limit blocks 8, and the limit blocks 8 are matched with the limit grooves. In this embodiment, whole extinguishing device can install at the spacing inslot through stopper 8, and go up frame 1.2 and underframe 1.3 and also can be spacing with inside extinguishing device when spacing with battery 1.1, and it is very convenient to use.
Preferably, a plurality of spray holes 6 are linearly distributed on one side surface of the cylinder 2, and the spray holes 6 are blocked by the columnar fire extinguishing agent 4 in the cylinder 2. In this embodiment, the surface of the cylinder 2 is provided with a plurality of spray holes 6, and the spray holes 6 can be uniformly distributed on the surface of the cylinder 2, so that a three-dimensional fire extinguishing process can be realized, but because the volume of the fire extinguishing agent is small, the fire extinguishing effect under a three-dimensional structure is not good; in the embodiment, the spray holes 6 can be arranged on only one side surface of the cylinder 2, and the plurality of spray holes 6 are arranged on one side surface of the cylinder 2, so that the fire extinguishing area is relatively reduced, and the fire extinguishing effect is increased under the condition that the fire extinguishing dosage is the same; in this embodiment, the spray holes 6 may also be arranged on a straight line on one side of the cylinder 2 (as shown in fig. 6 and 7), so that the fire extinguishing area can be further reduced, and the fire extinguishing effect can be further increased under the condition of the same fire extinguishing amount.
Preferably, the plurality of injection holes 6 are linearly distributed from one end close to the ignition device 5 to one end far away from the ignition device 5, and the diameters of the injection holes are gradually reduced (as shown in fig. 6). After the design, the diameter of the spray hole 6 is larger as the distance from the ignition device 5 is closer to the ignition device 5, and the diameter of the spray hole 6 from the end close to the ignition device 5 to the end far away from the ignition device 5 is smaller and smaller, so that when the ignition device 5 ignites, because the combustion space in the cylinder 2 is smaller, the pressure in the cylinder 2 after the columnar fire extinguishing agent 4 is close to the surface layer of the ignition device 5 and is combusted and gasified is increased suddenly, if the caliber of the spray hole 6 is smaller, the risk of explosion is faced, therefore, the diameter of the spray hole 6 is larger as the distance from the ignition device 5 is closer to the spray hole 6, and after the columnar fire extinguishing agent 4 is gradually ignited, the combustion space in the cylinder 2 is larger, and at this time, if the caliber of the spray hole.
Preferably, the spray holes 6 are directed towards the gap between the cells 1.1. As shown in fig. 2, it corresponds to that the spray holes 6 are arranged on a straight line of one side surface of the cylinder 2, and the spray holes 6 are all towards the direction of the gap between two rows of batteries; as shown in fig. 3, it corresponds to that the spray holes 6 are uniformly distributed on the surface of the cylinder 2, so as to realize a three-dimensional fire extinguishing process, and each spray hole 6 faces to the direction of the gap between two batteries; the two designs are beneficial to quickly dispersing the fire extinguishing agent sprayed from the spray holes 6 among the batteries 1.1, so that the effect of quickly extinguishing fire is achieved.
Preferably, the cylinder 2 is a hollow cylinder structure with one end closed and the other end open, the diameter of the cylinder is 5-20mm, and the height of the cylinder is 20-60 mm. A cartridge 2 of this size is well suited for placement in a battery pack 1 having a very small space inside the housing.
In addition, the fire extinguishing method of the fire extinguishing device comprises the following steps:
step 1): when a fire disaster happens, a fire point detection module 7 in the battery pack 1 detects a fire point and transmits a signal to a microprocessor, and the microprocessor controls an ignition device 5 to start and ignite a columnar fire extinguishing agent 4;
step 2): the columnar fire extinguishing agent 4 is gradually ignited from the ignition end to the other end, and gradually releases the fire extinguishing agent;
step 3): the fire extinguishing agent is firstly sprayed out from the spray holes 6 close to the ignition device 5, and the spray holes 6 blocked by the columnar fire extinguishing agent 4 are gradually opened in the spraying process;
step 4): the fire extinguishing agent is sprayed outwards gradually towards the spray holes 6 far away from the ignition device 5, and the fire extinguishing agent is released to the gaps among the batteries 1.1 to extinguish the fire.
In the prior art, the fire extinguishing concentration of the aerosol can be 20g per 1 cube, the fire extinguishing device of the embodiment is proportionally reduced by ten times (the diameter of the cylinder body 2 is 10mm, the height is 41 mm), and the fire extinguishing concentration of 0.1 cube of 2g of aerosol can be at least reached, and as the volume of the fire extinguishing space is reduced, the smaller the volume of the fire extinguishing space is in the actual application process, the better the tightness of the space is, so that the fire extinguishing effect of full flooding of the aerosol is more facilitated, and the fire extinguishing concentration is more than 2g per 0.1 cube in the actual application process.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (9)
1. The utility model provides a miniature extinguishing device of rechargeable battery group, includes barrel (2) and cover (3) that are located barrel (2) one end between each battery (1.1) lateral wall in locating group battery (1), be equipped with column fire extinguishing agent (4), its characterized in that in barrel (2): the end part of the columnar fire extinguishing agent (4) is provided with an ignition device (5), and the surface of the cylinder body (2) is provided with a plurality of spray holes (6).
2. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 1, wherein: ignition (5) are the electric ignition head structure, still are equipped with ignition detection module (7) in group battery (1), ignition detection module (7) are connected with ignition (5) control end through microprocessor.
3. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 2, wherein: the fire detection module (7) comprises a temperature sensor and/or a smoke sensor.
4. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 1, wherein: ignition device (5) are the fuse structure, barrel (2) and cover (3) detachably connect, column fire extinguishing agent (4) are aerosol fire extinguishing agent.
5. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 1, wherein: the battery pack (1) comprises an upper frame (1.2) and a lower frame (1.3), wherein two ends of the battery (1.1) are respectively arranged on the upper frame (1.2) and the lower frame (1.3); the upper frame (1.2) and the lower frame (1.3) are both provided with limiting grooves, the outer side of the cylinder cover (3) and the outer side of the cylinder body (2) are both provided with limiting blocks (8), and the limiting blocks (8) are matched with the limiting grooves.
6. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 1, wherein: the plurality of spray holes (6) are linearly distributed on one side surface of the cylinder body (2), and the columnar fire extinguishing agent (4) in the cylinder body (2) blocks the spray holes (6).
7. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 6, wherein: the plurality of spray holes (6) are linearly distributed from one end close to the ignition device (5) to one end far away from the ignition device (5), and the diameters of the spray holes are gradually reduced.
8. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 1 or 6, wherein: the spray holes (6) face the direction of the gaps between the batteries (1.1).
9. A miniature fire extinguishing apparatus for a rechargeable battery pack according to claim 1, wherein: the cylinder body (2) is of a hollow cylinder structure with one closed end and the other open end, the diameter of the cylinder body is 5-20mm, and the height of the cylinder body is 20-60 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920878689.6U CN210384641U (en) | 2019-06-12 | 2019-06-12 | Miniature fire extinguishing device of rechargeable battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920878689.6U CN210384641U (en) | 2019-06-12 | 2019-06-12 | Miniature fire extinguishing device of rechargeable battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210384641U true CN210384641U (en) | 2020-04-24 |
Family
ID=70348835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920878689.6U Active CN210384641U (en) | 2019-06-12 | 2019-06-12 | Miniature fire extinguishing device of rechargeable battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210384641U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170127A (en) * | 2019-06-12 | 2019-08-27 | 湖北及安盾消防科技有限公司 | A kind of the microminiature extinguishing device and its extinguishing method of rechargeable battery pack |
-
2019
- 2019-06-12 CN CN201920878689.6U patent/CN210384641U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110170127A (en) * | 2019-06-12 | 2019-08-27 | 湖北及安盾消防科技有限公司 | A kind of the microminiature extinguishing device and its extinguishing method of rechargeable battery pack |
| CN110170127B (en) * | 2019-06-12 | 2024-03-29 | 湖北及安盾消防科技有限公司 | Microminiature fire extinguishing device with rechargeable battery pack and fire extinguishing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110170127B (en) | Microminiature fire extinguishing device with rechargeable battery pack and fire extinguishing method thereof | |
| JP6042734B2 (en) | Fire extinguisher | |
| CN211751978U (en) | Pulse type aerosol fire extinguishing device | |
| CN210384641U (en) | Miniature fire extinguishing device of rechargeable battery pack | |
| CN111013071A (en) | Pressure-building pulse type fire extinguishing method and fire extinguishing device thereof | |
| CN210409296U (en) | Safe microminiature extinguishing device | |
| CN216536631U (en) | Power battery and two-wheeled electric vehicle | |
| CN107871906A (en) | Carry the lithium battery box of fire prevention and control function | |
| CN114221085A (en) | Thermal runaway safety protection structure of large-capacity battery | |
| CN213941926U (en) | Special fire prevention intelligence management and control system that puts out a fire of ternary lithium ion power battery case | |
| CN218774215U (en) | Fire extinguisher for preventing secondary reburning of perfluorohexanone | |
| CN210728492U (en) | Novel cooling fire extinguishing bomb | |
| CN215231825U (en) | Automatic fire extinguishing device | |
| CN110743116A (en) | Device capable of delaying spraying and continuously extinguishing fire and fire extinguishing method | |
| CN211357535U (en) | Automatic trigger fire extinguishing device | |
| CN211986780U (en) | Automatic fire extinguisher and fire extinguishing system | |
| CN214629913U (en) | Protection device for preventing spontaneous combustion and spontaneous explosion during charging of electronic cigarette | |
| CN208852287U (en) | Fire extinguishing box | |
| CN108721808A (en) | Fire extinguishing box and extinguishing method | |
| CN219721759U (en) | Miniature non-pressure-storage perfluorinated hexanone fire extinguishing device with feedback function | |
| CN215387154U (en) | Fire fighting structure for energy storage container | |
| CN110180111A (en) | A kind of safe microminiature extinguishing device and its extinguishing method | |
| CN219614798U (en) | Small-sized space automatic fire extinguishing device | |
| CN220070551U (en) | Pulse type aerosol fire extinguishing device with limiting teeth | |
| CN220443075U (en) | Non-pressure-storage type fire extinguisher of small perfluorinated hexanone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A miniature fire extinguishing device with rechargeable battery pack Effective date of registration: 20231214 Granted publication date: 20200424 Pledgee: Bank of Hankou Limited by Share Ltd. Yichang branch Pledgor: Hubei and Andun Fire Technology Co.,Ltd. Registration number: Y2023980071183 |