CN220628001U - Lithium iron phosphate battery energy storage integrated battery pack - Google Patents
Lithium iron phosphate battery energy storage integrated battery pack Download PDFInfo
- Publication number
- CN220628001U CN220628001U CN202322172835.2U CN202322172835U CN220628001U CN 220628001 U CN220628001 U CN 220628001U CN 202322172835 U CN202322172835 U CN 202322172835U CN 220628001 U CN220628001 U CN 220628001U
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- CN
- China
- Prior art keywords
- iron phosphate
- lithium iron
- phosphate battery
- energy storage
- storage integrated
- 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.)
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- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 title claims abstract description 86
- 238000004146 energy storage Methods 0.000 title claims description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000741 silica gel Substances 0.000 claims description 9
- 229910002027 silica gel Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 description 12
- 238000001816 cooling Methods 0.000 description 10
- 239000000428 dust Substances 0.000 description 9
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Mounting, Suspending (AREA)
- Primary Cells (AREA)
Abstract
The utility model provides an integrated battery pack for storing energy of a lithium iron phosphate battery, which comprises a lower shell provided with at least one opening for placing a lithium iron phosphate battery core group and an upper shell cover for covering and opening the opening of the lower shell, wherein both sides of the lower shell are provided with radiating openings, and the interiors of the two radiating openings are provided with dustproof filter screens.
Description
Technical Field
The utility model belongs to the technical field of battery packs, and particularly relates to an integrated battery pack for storing energy of a lithium iron phosphate battery.
Background
The battery energy storage system is taken as an important component of the new energy system and is a key subsystem of the new energy system. The lithium iron phosphate battery refers to a lithium ion battery using lithium iron phosphate as a positive electrode material. When the lithium iron phosphate battery is charged, part of lithium ions in the lithium iron phosphate are released, the lithium ions are transferred to the negative electrode through the electrolyte, meanwhile, the positive electrode releases electrons, the lithium ions reach the negative electrode from the external circuit, balance of chemical reaction is maintained, during discharging, the lithium ions are released from the negative electrode, the lithium ions reach the positive electrode through the electrolyte, meanwhile, the electrons are released from the negative electrode, the lithium iron phosphate battery reaches the positive electrode, the lithium iron phosphate battery provides energy for the outside, the lithium iron phosphate battery has larger capacity than a common battery (lead acid and the like), the volume of the lithium iron phosphate battery with the same specification is two thirds of the volume of the lead acid battery, the weight of the lithium iron phosphate battery is one third of the volume of the lead acid battery, the lithium iron phosphate battery is widely applied very quickly based on the characteristics, and the lithium iron phosphate battery energy storage integrated battery pack is a lithium iron phosphate battery core assembly.
In order to guarantee the radiating effect, the existing lithium iron phosphate battery energy storage integrated battery pack can be provided with a plurality of hollow structures with large areas on the battery pack, when the arrangement is adopted, external water is easy to splash into the lithium iron phosphate battery energy storage integrated battery pack to damage the lithium iron phosphate battery, and meanwhile, the lithium iron phosphate battery inside the lithium iron phosphate battery energy storage integrated battery pack is easy to contact impurities and dust in the external environment, so that the lithium iron phosphate battery is short-circuited, and the service life of the lithium iron phosphate battery energy storage integrated battery pack is short.
Accordingly, in view of the above, research and improvement are made to the existing structure and the existing defects, and an integrated battery pack for storing energy of lithium iron phosphate batteries is provided, so as to achieve the purpose of having more practical value.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an integrated battery pack for storing energy of a lithium iron phosphate battery, which aims to solve the problems that in order to ensure the heat dissipation effect, a plurality of hollow structures with large area are arranged on the battery pack, when the arrangement is adopted, external water is easy to splash into the integrated battery pack for storing energy of the lithium iron phosphate battery, so that the lithium iron phosphate battery in the integrated battery pack for storing energy of the lithium iron phosphate battery is damaged, and meanwhile, the lithium iron phosphate battery in the integrated battery pack for storing energy of the lithium iron phosphate battery is easy to contact with impurities and dust in the external environment, so that the lithium iron phosphate battery is short-circuited, and the service life of the integrated battery pack for storing energy of the lithium iron phosphate battery is short.
The purpose and the efficacy of the lithium iron phosphate battery energy storage integrated battery pack are achieved by the following specific technical means:
the utility model provides an integrated battery package of lithium iron phosphate battery energy storage, is including being equipped with at least one opening in order to be used for placing the inferior valve body of lithium iron phosphate battery cell group and being used for the lid to close and open inferior valve body open-ended last cap, the thermovent has all been seted up to the both sides of inferior valve body, two the inside of thermovent all is equipped with dustproof filter screen, two the outside of dustproof filter screen all overlaps and is equipped with folding rubber cover, two folding rubber cover is gone up the equal a plurality of louvres that have been seted up apart from of folding department, two folding rubber cover is kept away from dustproof filter screen's one end all is connected with the waterproof board, the bottom is equipped with aluminum product heat dissipation baffle down, lithium iron phosphate battery cell group locates aluminum product heat dissipation baffle's top, the interval equidistance distributes between lithium iron phosphate battery cell of lithium iron phosphate battery cell group has a plurality of cooling tubes, every the both ends of cooling tube are the opening setting, and a plurality of communicating bottom through-holes of cooling tube one to one are seted up to the bottom equidistance of inferior valve body.
Further, four jacks are formed in two sides of the lower shell, each jack is internally connected with an electric push rod, and a piston rod end of each electric push rod is connected to the inner side corner of the waterproof plate.
Further, both sides of the lithium iron phosphate battery cell group are respectively provided with a heat conduction silica gel plate in a lamination mode, one side, far away from the lithium iron phosphate battery cell group, of each heat conduction silica gel plate is respectively connected with a radiating fin, and each radiating fin is respectively attached to the inner side of the dustproof filter screen.
Further, a plurality of the top of cooling tube all is higher than the top of lithium iron phosphate battery core group, and adopts copper material to make, the bottom four corners of lower casing all is connected with and lifts the base.
Further, an upper edge is extended at the edge of the upper shell cover, a lower edge is connected to the outer side of the top of the lower shell, and the upper edge and the lower edge are connected through four locking bolts and fixing nuts.
Further, the opposite surfaces of the upper edge and the lower edge are provided with mounting grooves, and rubber rings are extruded and clamped in the mounting grooves.
Further, the lower shell and the upper shell cover are made of SMC composite materials, and a plurality of reinforcing ribs are distributed on the front side and the rear side of the lower shell at equal intervals.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the utility model, the radiating ports on two sides of the lower shell and the dustproof filter screen in the lower shell are utilized to radiate and prevent dust, meanwhile, the folding rubber cover is elongated, so that the radiating ports are unfolded to cooperate with the radiating ports to radiate simultaneously, the electric push rod is started, the piston rod end of the electric push rod is retracted, the folding rubber cover is folded and stored at the radiating ports to shield the dustproof filter screen, the radiating ports are folded and stored at the folding positions of the folding rubber cover, at the moment, external water is blocked outside and cannot splash into the lower shell, the waterproof effect is achieved, and the service life of the whole lithium iron phosphate battery energy storage integrated battery pack is integrally prolonged;
2. the dustproof filter screen is arranged to isolate most of external dust and other impurities from the outside of the lower shell, so that dust is prevented from contacting with the lithium iron phosphate battery core, the short circuit phenomenon is effectively avoided, meanwhile, a plurality of radiating pipes are utilized to contact with the lithium iron phosphate battery core, heat is absorbed, the principle that gas heating rises is utilized, external air enters from a bottom through hole, hot gas flows out from the top end of the radiating pipe, heat of the lithium iron phosphate battery core is taken away, a heat conduction silica gel plate is in contact with the lithium iron phosphate battery core to conduct heat, heat is transferred to the radiating fins, and flows out from the dustproof filter screen to radiate heat for the lithium iron phosphate battery core, and the service life of the lithium iron phosphate battery energy storage integrated battery pack is prolonged.
Drawings
Fig. 1 is a schematic perspective view of the present utility model.
Fig. 2 is a schematic perspective view of a second embodiment of the present utility model.
Fig. 3 is an enlarged schematic view of a of fig. 1 in accordance with the present utility model.
Fig. 4 is a schematic view of a front sectional structure of the present utility model.
In the figure, the correspondence between the component names and the drawing numbers is:
1. a lower housing; 2. a top cover; 3. a heat radiation port; 4. a dust-proof filter screen; 5. a jack; 6. an electric push rod; 7. a waterproof board; 8. folding the rubber cover; 9. a heat radiation hole; 10. aluminum material heat dissipation baffle plates; 11. a lithium iron phosphate battery cell pack; 12. a heat radiating pipe; 13. a thermally conductive silicone plate; 14. a heat radiation fin; 15. a bottom through hole; 16. raising the base; 17. a lower edge; 18. an upper edge; 19. a fixing nut; 20. a locking bolt; 21. reinforcing ribs; 22. a rubber ring; 23. and a mounting groove.
Detailed Description
Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.
In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples:
as shown in fig. 1 to 4:
the utility model provides an integrated battery pack for storing energy of a lithium iron phosphate battery, which comprises a lower shell 1 provided with at least one opening for placing a lithium iron phosphate battery core group 11 and an upper shell cover 2 for covering and opening the opening of the lower shell 1, wherein heat dissipation openings 3 are formed in two sides of the lower shell 1, dust-proof filter screens 4 are arranged in the two heat dissipation openings 3, the dust-proof filter screens 4 can isolate most of impurities such as dust outside the lower shell 1, the dust is prevented from contacting the lithium iron phosphate battery core group 11, so that the occurrence of a short circuit phenomenon is effectively avoided, folding rubber covers 8 are sleeved on the outer sides of the two dust-proof filter screens 4, a plurality of heat dissipation holes 9 are uniformly formed in the folding positions of the two folding rubber covers 8, one ends of the two folding rubber covers 8 far away from the dust-proof filter screens 4 are connected with waterproof plates 7, an aluminum heat dissipation partition plate 10 is arranged at the inner bottom of the lower shell 1, the lithium iron phosphate battery core group 11 is arranged at the top of the aluminum heat dissipation partition plate 10, a plurality of pipes 12 are distributed between the lithium iron phosphate battery cores of the dust-proof filter cores 11 at equal intervals, the two ends of each pipe 12 are provided with heat dissipation holes 15 which are respectively communicated with the bottom of the heat dissipation pipes 1, and the two ends of the two heat dissipation pipes are arranged at equal intervals.
In other embodiments, four jacks 5 have all been seted up to the both sides of lower casing 1, all be connected with electric putter 6 in every jack 5, the piston rod end of every electric putter 6 all is connected in waterproof board 7's inboard corner, start electric putter 6, electric putter 6's piston rod end withdrawal, make folding rubber cover 8 fold and accomodate in the cooling hole 3 department outside, shelter from dustproof filter screen 4, also fold into folding rubber cover 8's folding department with a plurality of louvres 9, external water will be blocked in the outside this moment, can not splash into lower casing 1 inside, play waterproof effect, wholly improved the holistic life of lithium iron phosphate battery energy storage integrated battery package.
In other embodiments, the two sides of the lithium iron phosphate battery core group 11 are respectively provided with heat-conducting silica gel plates 13 in a bonding manner, one side, far away from the lithium iron phosphate battery core group 11, of each heat-conducting silica gel plate 13 is connected with a radiating fin 14, each radiating fin 14 is respectively bonded on the inner side of the dustproof filter screen 4, the heat-conducting silica gel plates 13 are used for conducting contact with the lithium iron phosphate battery core group 11 to transfer heat into the radiating fins 14, the radiating area of the radiating fins 14 is increased, and the heat flows out of the dustproof filter screen 4 of the radiating port 3.
In other embodiments, the top of a plurality of cooling tubes 12 is higher than the top of lithium iron phosphate battery core group 11, and adopts copper to make, and cooling tube 12 copper makes, and intensity is high, coefficient of heat conductivity is high, and cooling tube 12 not only can play radiating effect, can also increase the intensity of lower casing 1, and the bottom four corners of lower casing 1 all is connected with and lifts base 16, utilizes to lift the base 16 with lower casing 1 bottom, makes things convenient for the outside air to get into in the cooling tube 12 from bottom through-hole 15.
In other embodiments, the edge of the upper casing cover 2 extends to form an upper edge 18, the outer side of the top of the lower casing 1 is connected with a lower edge 17, the upper edge 18 and the lower edge 17 are connected through four locking bolts 20 and fixing nuts 19, and the locking bolts 20 and the fixing nuts 19 are used for connecting the upper edge 18 and the lower edge 17, so that the installation and the disassembly are more convenient.
In other embodiments, the opposite surfaces of the upper edge 18 and the lower edge 17 are provided with mounting grooves 23, rubber rings 22 are clamped in the mounting grooves 23 in an extrusion manner, and the joints between the upper edge 18 and the lower edge 17 are sealed by the rubber rings 22, so that dust is reduced.
In other embodiments, the lower shell 1 and the upper shell cover 2 are made of an SMC composite material, a plurality of reinforcing ribs 21 are distributed on the front side and the rear side of the lower shell 1 at equal intervals, the lower shell 1 is reinforced by the plurality of reinforcing ribs 21, the lower shell 1 and the upper shell cover 2 are made of an SMC composite material, the strength of the SMC composite material is close to that of an aluminum alloy, and the weight of the SMC composite material is reduced by about 40-50% compared with that of a steel material, so that the lightweight design of the lithium iron phosphate battery energy storage integrated battery pack is realized.
Specific use and action of the embodiment:
according to the utility model, the heat conduction silica gel plate 13 is used for conducting contact with the lithium iron phosphate battery core group 11, heat is transferred into the radiating fins 14, the radiating area of the radiating fins 14 is increased, the heat flows out of the dustproof filter screen 4 of the radiating port 3, meanwhile, the plurality of radiating pipes 12 are used for conducting contact with the lithium iron phosphate battery core group 11, the heat is absorbed, the principle of rising of gas heating is used, external air enters from the bottom through hole 15, the hot gas flows out of the top end of the radiating pipes 12, so that the heat of the lithium iron phosphate battery core in the lithium iron phosphate battery core group 11 is taken away, meanwhile, the electric push rod 6 is started, the piston rod end of the electric push rod 6 is extended, the folding rubber cover 8 is extended, the plurality of radiating holes 9 are extended and matched with the radiating port 3 for radiating simultaneously, so that the air in the whole lithium iron phosphate battery energy storage integrated battery pack is in a flowing state, and the hot air in the lithium iron phosphate battery energy storage integrated battery pack is mixed with cold air flow in an external space, so that the heat emitted by the lithium iron phosphate battery energy storage integrated battery pack is taken away, and a good working environment is provided for the battery pack;
starting electric putter 6, electric putter's 6 piston rod end withdrawal for folding rubber cover 8 is folding to be accomodate in the cooling hole 3 department outside, shelters from dust screen 4, also folds into folding rubber cover 8's folding department with a plurality of louvres 9, and external water will be blocked outside this moment, can not splash into down inside the casing 1, plays waterproof effect, has wholly improved the holistic life of lithium iron phosphate battery energy storage integrated battery package.
The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. The utility model provides a lithium iron phosphate battery energy storage integrated battery package which characterized in that: including being equipped with at least one opening with be used for placing lower casing (1) of lithium iron phosphate battery core group (11) and be used for the lid to close and open casing (1) open-ended last cap (2), thermovent (3) have all been seted up to the both sides of casing (1) down, two the inside of thermovent (3) all is equipped with dustproof filter screen (4), two the outside of dustproof filter screen (4) all overlaps and is equipped with folding rubber cover (8), two folding rubber cover (8) are gone up the equal a plurality of louvres (9) apart from having seted up, two folding rubber cover (8) keep away from dustproof filter screen (4) one end all is connected with waterproof board (7), be equipped with aluminum product radiator partition (10) in casing (1) down, the top of aluminum product radiator partition (10) is located to lithium iron phosphate battery core group (11), interval equidistance between lithium iron phosphate battery core of lithium iron phosphate group (11) distributes and has a plurality of tubes (12), every both ends of tube (12) are opening setting up, and bottom that casing (1) are kept away from radiating bottom (15) communicate with each other.
2. The lithium iron phosphate battery energy storage integrated battery pack of claim 1, wherein: four jacks (5) are formed in two sides of the lower shell (1), each jack (5) is internally connected with an electric push rod (6), and a piston rod end of each electric push rod (6) is connected to an inner side corner of the waterproof plate (7).
3. The lithium iron phosphate battery energy storage integrated battery pack of claim 1, wherein: the lithium iron phosphate battery cell pack comprises a lithium iron phosphate battery cell pack body, wherein the two sides of the lithium iron phosphate battery cell pack body (11) are respectively provided with a heat conduction silica gel plate (13) in a fitting mode, one side, away from the lithium iron phosphate battery cell pack body (11), of each heat conduction silica gel plate (13) is respectively connected with a radiating fin (14), and each radiating fin (14) is respectively provided with the inner side of a dustproof filter screen (4) in a fitting mode.
4. The lithium iron phosphate battery energy storage integrated battery pack of claim 1, wherein: the top ends of the radiating pipes (12) are higher than the top of the lithium iron phosphate battery core group (11), the lithium iron phosphate battery core group is made of copper materials, and lifting bases (16) are connected to four corners of the bottom of the lower shell (1).
5. The lithium iron phosphate battery energy storage integrated battery pack of claim 1, wherein: the edge of the upper shell cover (2) extends to form an upper edge (18), the outer side of the top of the lower shell (1) is connected with a lower edge (17), and the upper edge (18) and the lower edge (17) are connected through four locking bolts (20) and fixing nuts (19).
6. The lithium iron phosphate battery energy storage integrated battery pack according to claim 5, wherein: the opposite surfaces of the upper edge (18) and the lower edge (17) are respectively provided with a mounting groove (23), and rubber rings (22) are extruded and clamped in the mounting grooves (23).
7. The lithium iron phosphate battery energy storage integrated battery pack of claim 1, wherein: the lower shell (1) and the upper shell cover (2) are made of SMC composite materials, and a plurality of reinforcing ribs (21) are distributed on the front side and the rear side of the lower shell (1) at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322172835.2U CN220628001U (en) | 2023-08-11 | 2023-08-11 | Lithium iron phosphate battery energy storage integrated battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322172835.2U CN220628001U (en) | 2023-08-11 | 2023-08-11 | Lithium iron phosphate battery energy storage integrated battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220628001U true CN220628001U (en) | 2024-03-19 |
Family
ID=90234497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322172835.2U Active CN220628001U (en) | 2023-08-11 | 2023-08-11 | Lithium iron phosphate battery energy storage integrated battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220628001U (en) |
-
2023
- 2023-08-11 CN CN202322172835.2U patent/CN220628001U/en active Active
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