CN216319618U - Fire extinguishing device fixing structure and battery pack thereof - Google Patents
Fire extinguishing device fixing structure and battery pack thereof Download PDFInfo
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- CN216319618U CN216319618U CN202121848622.1U CN202121848622U CN216319618U CN 216319618 U CN216319618 U CN 216319618U CN 202121848622 U CN202121848622 U CN 202121848622U CN 216319618 U CN216319618 U CN 216319618U
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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 fire extinguishing device fixing structure and a battery pack thereof. The fire extinguishing device fixing structure comprises a fire extinguishing device, a connecting mechanism and a battery module row, wherein the battery module row comprises a plurality of battery modules which are arranged along the length direction of the battery modules; the battery module comprises a module frame and a plurality of batteries arranged in the module frame, wherein at least two batteries in the plurality of batteries are provided with battery safety valves; the fire extinguishing device is arranged on the battery module row through the connecting mechanism and aims at the battery safety valve; the fire extinguishing device comprises a shell, and fire extinguishing materials are sealed in the shell; the housing is at least partially made of a meltable material so that a high-temperature substance flushed out after the battery safety valve bursts can melt the housing to release the fire extinguishing material. The utility model reduces/prevents the possibility of thermal runaway of the battery by the arrangement of the fixing structure of the fire extinguishing device and the optimization of the battery pack.
Description
Technical Field
The utility model belongs to the technical field of power batteries, and relates to a fire extinguishing device fixing structure and a battery pack thereof.
Background
In order to obtain higher energy/power, a plurality of batteries are often connected to form a module/battery pack, in the current power battery, if the battery is abused or misused, explosion is likely to occur when gas, a large amount of heat or other substances are likely to be generated inside the battery, and in order to obtain high volume energy, the space between the plurality of batteries is relatively small, so that the abnormal battery is easy to cause peripheral chain reaction and even thermal runaway.
In order to solve the problem, a fire extinguishing tank filled with fire extinguishing agents is often additionally used in the industry, certain pressure is pre-installed in the fire extinguishing tank, the fire extinguishing tank is connected into a battery pack through a pipe, a closing valve is arranged on the pipeline, the closing valve is opened in time when a fire disaster happens, the fire extinguishing agents are injected into a battery box through the pressure in the fire extinguishing tank, the fire extinguishing/cooling purpose is achieved, and the disaster is prevented from further expanding.
Compared with the traditional battery pack without a fire extinguishing device, the battery pack has certain fire extinguishing function, but the technology has the following defects:
(1) a pressure tank with certain pressure is required to be additionally equipped;
(2) the pressure tank needs to be measured and checked for safety at regular intervals;
(3) installing the pressure tank at an additional place;
(4) a plurality of accessory accessories such as valve bodies, conveying pipelines and sealing connecting pieces for entering and exiting the box body are needed;
(5) the triggering mode is not very reliable, the switch valve body is triggered by temperature induction/salt mist induction in the battery pack, and the failure risk is high.
SUMMERY OF THE UTILITY MODEL
The problems to be solved by the utility model are as follows: the utility model reduces/prevents the possibility of thermal runaway of the battery by the arrangement of the fixing structure of the fire extinguishing device and the optimization of the battery pack.
In order to solve the problems, the utility model adopts the following scheme:
a fire extinguishing apparatus fixing structure comprises a fire extinguishing apparatus, a connecting mechanism and a battery module row, wherein the battery module row comprises a plurality of battery modules which are arranged along the length direction of the battery modules; the battery module comprises a module frame and a plurality of batteries arranged in the module frame, wherein at least two batteries in the batteries are provided with battery safety valves; the fire extinguishing device is arranged on the battery module row through the connecting mechanism, and the fire extinguishing device is made to be opposite to the battery safety valve; the fire extinguishing device comprises a shell, and fire extinguishing materials are encapsulated in the shell; the housing is at least partially made of a meltable material so that a high-temperature substance rushed out after the battery safety valve is exploded can melt it to release the fire extinguishing material.
Further, according to the fire extinguishing apparatus fixing structure provided by the utility model, the connecting mechanism comprises a connecting piece I, and two ends of the fire extinguishing apparatus are fixedly supported at two ends of the battery module row through the connecting piece I respectively.
Further, according to the fire extinguishing apparatus fixing structure, the connecting piece I is in a shape like a Chinese character 'ji', and comprises a top surface I, support legs I and a bottom surface I, wherein the support legs I are arranged on two sides of the top surface I respectively, and the bottom surface I is arranged at the bottoms of the support legs I; the front edge or the rear edge of the top surface I is provided with an extending surface extending outwards, and two ends of the extending surface in the length direction continue to extend towards the two ends, so that the length of the extending surface is greater than that of the top surface I; the extension face is provided with two mounting holes, and the bottom face I is provided with a mounting hole.
Further, according to the fire extinguishing apparatus fixing structure of the present invention, mounting plates are provided on both sides of the housing in the length direction, and the mounting plates are provided with a plurality of connecting holes; bolts penetrate through the mounting holes in the extending surface to be connected with the connecting holes, and the connecting piece I is fixed at the bottom of the fire extinguishing device.
Further, according to the fire extinguishing apparatus fixing structure of the present invention, the module frame includes two end plates, and two connection holes are provided on end surfaces of tops of the end plates; and bolts penetrate through the mounting holes in the bottom surface I to be connected with the connecting holes, and the connecting piece I is fixed to the top of the end plate.
Further, according to the fire extinguishing apparatus fixing structure provided by the utility model, the distance between the two connecting holes is a, the width of the battery module is b, and a is greater than or equal to 1/10b and less than or equal to 4/5 b.
Further, according to the fire extinguishing apparatus fixing structure provided by the utility model, the connecting mechanism further comprises the connecting piece II, and the middle part of the fire extinguishing apparatus is fixedly supported between two adjacent battery modules in the battery module row through the connecting piece II.
Further, according to the fire extinguishing apparatus fixing structure, the connecting piece II is in a shape like a Chinese character 'ji', and comprises a top surface II, support legs II and a bottom surface II, wherein the support legs II are arranged on two sides of the top surface II respectively, and the bottom surface II is arranged at the bottoms of the support legs II; the front edge and the rear edge of the top surface II are provided with extending surfaces extending outwards, and two ends of each extending surface in the length direction continue to extend towards the two ends, so that the length of each extending surface is greater than that of the top surface II; the extension surface is provided with two mounting holes, and the bottom surface II is provided with two mounting holes.
Further, according to the fire extinguishing device fixing structure of the present invention, the fire extinguishing material includes one or a mixture of more of aerosol fire extinguishing agents, hexafluoropropane, heptafluoropropane, perfluorohexane, perfluorohexanone, perfluoropolyether, carbon dioxide, ammonium perfluorooctanoate, ethoxypentacyclotriphosphazene, hexafluoropropylene trimer, trifluoroethyl phosphate, perfluorononene, hydrofluorocarbon compounds, cac 2.6h2O, Na2SO 4.10h2O, CaBr 2.6h2O, CH3 coona.3h2O, paraffin and various acid esters, aliphatic hydrocarbons, aliphatic acids, alcohols, and polyenol; the hydrofluorocarbon compound comprises R134A, R125, R32, R407C, R410A and R152.
The battery pack comprises a box body and further comprises the fire extinguishing device fixing structure, and the fire extinguishing device fixing structures are arranged in the box body.
The utility model has the following technical effects: the utility model reduces/prevents the possibility of thermal runaway of the battery by the arrangement of the fixing structure of the fire extinguishing device and the optimization of the battery pack.
Drawings
Fig. 1 is a structural view illustrating the opening of a top cover of a battery pack according to the present invention.
FIG. 2 is a view showing a first embodiment of a fixing structure of the fire extinguishing apparatus according to the present invention.
Fig. 3 is an exploded view of fig. 2.
Fig. 4 is a structural view of a connector i of the present invention.
Fig. 5 is a structural view of a first embodiment of the utility model in which two end plates are aligned in a case.
Fig. 6 is a structural view of two connecting members i of adjacent end plates in fig. 5 combined together to form a single body.
FIG. 7 is a structural view of a second embodiment of a fire extinguishing apparatus fixing structure according to the present invention.
Fig. 8 is a structural view of a connector ii of the present invention.
Wherein the content of the first and second substances,
1 is a box body, 11 is a lower box body, and 12 is a top cover;
2 is a fire extinguishing device fixing structure, 21 is a fire extinguishing device, 211 is a housing, 2111 is a square flat tube, 2112 is a sealing cover, 212 is a mounting plate, 22 is a connecting mechanism, 221 is a connecting piece i, 2211 is a top surface i, 22111 is an extending surface, 2212 is a supporting leg i, 2213 is a bottom surface i, 222 is a connecting piece ii, 2221 is a top surface ii, 2222 is a supporting leg ii, 2223 is a bottom surface ii, 23 is a battery module row, 231 is a battery module, 2311 is a module frame, 23111 is an end plate, 23112 is a side plate, 2312 is a battery, 23121 is a battery safety valve, 2313 is a wiring harness isolation plate, and 2314 is a module upper cover;
3 is a mounting hole;
4 is a connecting hole;
and 5 is a bolt.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a battery pack comprises a box body 1 and a plurality of fire extinguishing device fixing structures 2 arranged in the box body 1. The box body 1 comprises a lower box body 11 and a top cover 12, and the top cover 12 covers the top of the lower box body 11, so that the fire extinguishing device fixing structure 2 is sealed in the box body 1. Specifically, the type of the casing 1 is not limited, and may be a frame profile type, a flat tray type, and an up-and-down cassette type. The fire extinguishing apparatus fixing structure 2 is the fire extinguishing apparatus fixing structure of the utility model.
Example one
As shown in fig. 2 and 3, the fire extinguishing device fixing structure 2 includes a fire extinguishing device 21, a connecting mechanism 22 and a battery module row 23, wherein the battery module row 23 includes battery modules 231 arranged along the length direction of the battery modules; the battery module 231 includes a module frame 2311, a plurality of batteries 2312 disposed in the module frame 2311, a harness insulation plate 2313 disposed at the top of the batteries 2312, and a module upper cover 2314 disposed at the top of the harness insulation plate 2313; at least two batteries 2312 of the plurality of batteries 2312 are provided with battery safety valves 23121; the fire extinguishing device 21 is disposed on the battery module row 23 through the connection mechanism 22, and such that the fire extinguishing device 21 is directed to the battery safety valve 23121; the fire extinguishing apparatus 21 includes a housing 211, and fire extinguishing material is enclosed in the housing 211; the housing 211 is at least partially made of a fusible material so that the high temperature substance flushed after the battery safety valve 23121 bursts can melt it to release the fire suppressant material. Specifically, the opening pressure of the battery safety valve 23121 is set to be 0.02-1.00 MPa, and 0.6MPa is preferably set for opening. The fusible material is a high-temperature substance which is rushed out after the battery safety valve 23121 bursts and can melt the fusible material, and comprises a low-melting-point alloy and a non-metallic material with flame retardant property. More specifically, the material for the housing 211 is preferably made of a low melting point alloy or a plastic having flame retardant properties. The low-melting-point alloy is an alloy with a melting point temperature not more than 300 ℃, and is preferably an aluminum alloy material; plastics with flame retardant properties such as PC or ABS. The fire extinguishing material is released by being triggered by being close to the battery module 231 or other heat sources, namely, the adjacent high temperature is transmitted, and the part of the shell 211 is melted by heat, so that the fire extinguishing material has the effects of inflaming retarding, heat insulation, cooling and fire extinguishing. Certainly, in order to improve the melting speed, an avoiding hole corresponding to the battery safety valve 23121 may be formed in the harness isolation plate 2313, and in addition, if the module upper cover 2314 is not made of a heat shrinkable tube, an avoiding hole corresponding to the battery safety valve 23121 may be formed, so that the harness isolation plate 2313 and the module upper cover 2314 need to be melted first to reduce the high-temperature substances flushed out after the battery safety valve 23121 explodes through the avoiding hole, and the fire extinguishing efficiency is further improved.
In this embodiment, the housing 211 of the fire extinguishing apparatus 21 includes the long and straight square flat tube 2111 and the sealing cover 2112, and the two ends of the square flat tube 2111 are sealed by the sealing cover 2112 provided thereto, so as to form a cavity for packaging the fire extinguishing material, and such square flat tube 2111 is convenient to form, simple in production process and suitable for mass production. Of course, as will be appreciated by those skilled in the art, the one end of the square tube 2111 is provided with an integral seal, so that only the seal 2112 is required to be installed at the unsealed end, but the production of the square tube 2111 with one end sealed is less convenient than the production of the square tube 2111 with two ends unsealed. The sealing covers 2112 are made of the same meltable material as the square flat tubes 2111, and can be sealed at the two ends of the square flat tubes 2111 in a welding mode, or in a bonding mode, or in an interference plugging mode and the like; of course, a combination of at least two of the above approaches may also be used; the fire extinguishing apparatus 21 is further provided with an injection port on the square flat tube 2111 or the sealing cap 2112, and fire extinguishing material is injected through the injection port, and the injection port is sealed after the injection of the fire extinguishing material in the fire extinguishing apparatus 21 is completed. The sealing can be performed by using a sealing pin or other sealing structure made of the same material as the housing 211, and the sealing can be performed by welding, or can be performed by bonding, or can be performed by interference insertion, or the like, or a combination of at least two of the above methods can also be performed. It will be appreciated by those skilled in the art that the fire extinguishing unit 21 may also be provided with vent holes through which venting during filling increases the rate of filling of the fire extinguishing material; the hole is simultaneously sealed after the infusion is complete.
Further, the connecting mechanism 22 includes a connecting member i 221, and both ends of the fire extinguishing device 21 are connected to both ends of the battery module row 23 through the connecting members i 221, respectively.
As shown in FIG. 4, the connecting piece I221 is in a shape of a Chinese character 'ji', and comprises a top surface I2211, support legs I2212 and a bottom surface I2213, wherein the support legs I2212 are respectively arranged on two sides of the top surface I2211, and the bottom surface I2213 is arranged at the bottom of the support legs I2212; the front edge or the rear edge of the top surface i 2211 is provided with an extending surface 22111 extending outwards, and two ends of the extending surface 22111 in the length direction continue to extend towards the two ends, so that the length of the extending surface 22111 is greater than that of the top surface i 2211; two mounting holes 3 are arranged on the extension face 22111, and one mounting hole 3 is arranged on the bottom face I2213.
Furthermore, mounting plates 212 are arranged on two sides of the housing 211 in the length direction, and two ends of each mounting plate 212 are respectively provided with a connecting hole 4; bolts 5 are used to pass through the mounting holes 3 of the extension 22111 and connect with the connecting holes 4, so that the connecting pieces i 221 are fixed to both ends of the bottom of the fire extinguishing apparatus 21, respectively.
In addition, the module frame 2311 includes two end plates 23111 and two side plates 23112, the two end plates 23111 being respectively disposed at both ends in the arrangement direction of the batteries 2312; the two side plates 23112 are respectively disposed at both sides of the arrangement direction of the batteries 2312, and both ends are respectively connected to the two end plates 23111. The battery 2312 is clamped from both sides by the side plates 23112 at both sides, and the battery 2312 is clamped from both ends by the end plates 23111 at both ends; the connection between the side plates 23112 and the end plates 23111 can be welding or screwing. The end face of the top of the end plate 23111 is provided with two connecting holes 4; the fire extinguishing device 21 can be fixedly supported on the top of the battery module 231 (i.e., the battery module row 23) by fixing the connecting member i 221 on the top of the end plate 23111 using bolts 5 which pass through the mounting holes 3 on the bottom surface i 2213 to connect with the connecting holes 4. The distance between the two connection holes 4 on the top end surface of the end plate 23111 is a, the width of the battery module 231 is b, 1/10b is equal to or less than a and equal to or less than 4/5b, and preferably a =1/3 b.
Those skilled in the art will appreciate that there are many alternative fire extinguishing materials under the above-described configuration. In particular, the fire extinguishing material is required to have flame retardant, heat insulation and fire extinguishing effects after being released. Such as either a fire suppressant, or a coolant, or a phase change material. Specifically, such fire extinguishing materials include, but are not limited to, aerosol fire extinguishing agents, hexafluoropropane, heptafluoropropane, perfluorohexane, perfluorohexanone, perfluoropolyether, carbon dioxide, ammonium perfluorooctanoate, ethoxypentafluorocyclotriphosphazene, hexafluoropropylene trimer, trifluoroethyl phosphate, perfluorononene, hydrofluorocarbon compounds, cac 2.6h2O, Na2SO 4.10h2O, CaBr 2.6h2O, CH3 coona.3h2O, paraffins and mixtures of one or more of various acid esters, aliphatic hydrocarbons, aliphatic acids, alcohols, and polyenols. Among them, the hydrofluorocarbon compounds include, but are not limited to, R134A, R125, R32, R407C, R410A, R152, and the like. The aerosol fire extinguishing agent can be KNO3, Sr (NO3)2, strontium compound and the like; those skilled in the art will appreciate that fire extinguishing materials also generally need to be materials that are non-toxic and non-polluting to the environment.
In addition, those skilled in the art understand that when the box body 1 is provided with a plurality of fire extinguishing apparatus fixing structures 2, as shown in fig. 5, two fire extinguishing apparatus fixing structures 2 with opposite ends are provided, the battery module row 23 in the fire extinguishing apparatus fixing structure 2 comprises one battery module 231, and the end plates 23111 adjacent to the two battery modules 231 are respectively provided with a connecting piece i 221 for fixedly supporting the respective fire extinguishing apparatus 21, for the sake of installation convenience, the two connecting pieces i 221 can be combined into a whole, and the structure of the whole is shown in fig. 6; of course, two separate connecting pieces I221 are also possible.
In addition, it should be noted that the box 1, the harness isolation plate 2313 and the module upper cover 2314 are familiar to those skilled in the art and are not in the scope of the present invention, and the description is not repeated herein.
Example two
Unlike the first embodiment, as shown in fig. 7, the battery module row 23 includes two battery modules 231 arranged along the length direction of the battery modules, the connecting mechanism 22 further includes a connecting member ii 222, and the middle portion of the fire extinguishing device 21 is fixedly supported between two adjacent battery modules 231 in the battery module row 23 through the connecting member ii 222.
Further, as shown in fig. 8, the connecting member ii 222 is shaped like a Chinese character 'ji', and includes a top surface ii 2221, support legs ii 2222 and a bottom surface ii 2223, wherein the support legs ii 2222 are respectively arranged on two sides of the top surface ii 2221, and the bottom surface ii 2223 is arranged at the bottom of the support legs ii 2222; the front edge and the rear edge of the top surface II 2221 are provided with extending surfaces 22111 extending outwards, and the two ends of the extending surfaces 22111 in the length direction continue to extend towards the two ends, so that the length of the extending surfaces is greater than that of the top surface II 2221; two mounting holes 3 are arranged on the extending surface 22111, and two mounting holes 3 are arranged on the bottom surface II 2223. The connecting member ii 222 is fixed to the middle section of the bottom of the fire extinguishing apparatus 21 by bolts 5, connected to the connecting holes 4 by bolts 5 penetrating through the mounting holes 3 on the bottom surface ii 2223, and fixed to the tops of two adjacent end plates 23111, so that the middle section of the fire extinguishing apparatus 21 is fixedly supported between two battery modules 231 by the connecting member ii 222. Of course, those skilled in the art will appreciate that the second connector II 222 may be two separate connectors I221.
Claims (9)
1. A fire extinguishing apparatus fixing structure is characterized in that: the fire extinguishing device comprises a fire extinguishing device, a connecting mechanism and a battery module row, wherein the battery module row comprises a plurality of battery modules which are arranged along the length direction of the battery modules; the battery module comprises a module frame and a plurality of batteries arranged in the module frame, wherein at least two batteries in the batteries are provided with battery safety valves; the fire extinguishing device is arranged on the battery module row through the connecting mechanism, and the fire extinguishing device is made to be opposite to the battery safety valve; the fire extinguishing device comprises a shell, and fire extinguishing materials are encapsulated in the shell; the housing is at least partially made of a meltable material so that a high-temperature substance rushed out after the battery safety valve is exploded can melt it to release the fire extinguishing material.
2. The fire extinguishing apparatus fixing structure according to claim 1, wherein the connecting mechanism includes a connecting member i, and both ends of the fire extinguishing apparatus are fixedly supported at both ends of the row of battery modules by the connecting member i, respectively.
3. The fire extinguishing apparatus fixing structure according to claim 2, wherein the connecting member i is in a shape of a Chinese character 'ji', and comprises a top surface i, support legs i and a bottom surface i, wherein the support legs i are respectively arranged on two sides of the top surface i, and the bottom surface i is arranged at the bottom of the support legs i; the front edge or the rear edge of the top surface I is provided with an extending surface extending outwards, and two ends of the extending surface in the length direction continue to extend towards the two ends, so that the length of the extending surface is greater than that of the top surface I; the extension face is provided with two mounting holes, and the bottom face I is provided with a mounting hole.
4. The fire extinguishing apparatus fixing structure according to claim 3, wherein mounting plates are provided at both sides of the housing in the length direction, the mounting plates being provided with a plurality of connection holes; bolts penetrate through the mounting holes in the extending surface to be connected with the connecting holes, and the connecting piece I is fixed at the bottom of the fire extinguishing device.
5. The fire extinguishing apparatus fixing structure according to claim 3, wherein the module frame comprises two end plates, and two connecting holes are provided on end faces of tops of the end plates; and bolts penetrate through the mounting holes in the bottom surface I to be connected with the connecting holes, and the connecting piece I is fixed to the top of the end plate.
6. The fire extinguishing apparatus fixing structure according to claim 5, wherein a distance between the two connection holes is a, and a width of the battery module is b, 1/10b a 4/5 b.
7. The fire extinguishing apparatus fixing structure according to claim 2, wherein the connecting mechanism further comprises a connecting member ii, and the middle portion of the fire extinguishing apparatus is fixedly supported between two adjacent battery modules in the row of battery modules by the connecting member ii.
8. The fire extinguishing apparatus fixing structure according to claim 7, wherein the connecting member II is in a shape of a Chinese character 'ji', and comprises a top surface II, support legs II and a bottom surface II, wherein the support legs II are respectively arranged on two sides of the top surface II, and the bottom surface II is arranged at the bottom of the support legs II; the front edge and the rear edge of the top surface II are provided with extending surfaces extending outwards, and two ends of each extending surface in the length direction continue to extend towards the two ends, so that the length of each extending surface is greater than that of the top surface II; the extension surface is provided with two mounting holes, and the bottom surface II is provided with two mounting holes.
9. The utility model provides a battery package, includes the box, its characterized in that: further comprising a fire extinguishing unit securing structure according to any one of claims 1-8, and a number of said fire extinguishing unit securing structures are arranged in said tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121848622.1U CN216319618U (en) | 2021-08-09 | 2021-08-09 | Fire extinguishing device fixing structure and battery pack thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121848622.1U CN216319618U (en) | 2021-08-09 | 2021-08-09 | Fire extinguishing device fixing structure and battery pack thereof |
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| Publication Number | Publication Date |
|---|---|
| CN216319618U true CN216319618U (en) | 2022-04-19 |
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|---|---|---|---|
| CN202121848622.1U Active CN216319618U (en) | 2021-08-09 | 2021-08-09 | Fire extinguishing device fixing structure and battery pack thereof |
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| Country | Link |
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| CN (1) | CN216319618U (en) |
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