CN220652069U - Button type lithium ion battery, electronic product and hearing aid - Google Patents
Button type lithium ion battery, electronic product and hearing aid Download PDFInfo
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- CN220652069U CN220652069U CN202322259766.9U CN202322259766U CN220652069U CN 220652069 U CN220652069 U CN 220652069U CN 202322259766 U CN202322259766 U CN 202322259766U CN 220652069 U CN220652069 U CN 220652069U
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- Prior art keywords
- active material
- negative electrode
- lithium ion
- electrode part
- positive electrode
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 43
- 239000011149 active material Substances 0.000 claims abstract description 72
- 239000007773 negative electrode material Substances 0.000 claims abstract description 8
- 239000007774 positive electrode material Substances 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000007769 metal material Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000010420 art technique Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003698 anagen phase Effects 0.000 description 1
- -1 but not limited to Substances 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Primary Cells (AREA)
Abstract
The utility model relates to the field of lithium ion batteries, and discloses a button type lithium ion battery, an electronic product and a hearing aid. The button lithium ion battery includes: the positive electrode part and the negative electrode part respectively comprise three-dimensional netlike conductive frameworks, each conductive framework respectively comprises an active material area and a non-filling area, the active material area of the positive electrode part is filled with positive electrode active materials, the active material area of the negative electrode part is filled with negative electrode active materials, the non-filling areas are free of active materials, the conductive frameworks are exposed, the positive electrode part and the negative electrode part filled with the active materials are rolled into flat columns, each non-filling area is respectively provided with a conductive sheet extending from the active material area, the insulating interval of the separator is between the positive electrode part and the active material area of the negative electrode part which are opposite and respectively provided with the flat columns, the shell, the positive electrode part, the negative electrode part and the separator are sealed in the shell, the active material area of the positive electrode part, the active material area of the negative electrode part and the negative electrode conductive sheet are arranged at two sides of the separator, and the positive electrode conductive sheet and the negative electrode conductive sheet are respectively connected with the positive electrode end and the negative electrode end of the shell at the side of the positive electrode part and the negative electrode end of the shell.
Description
Technical Field
The utility model relates to the field of battery manufacturing, in particular to a button type lithium ion battery, an electronic product and a hearing aid.
Background
With the wider and wider application of intelligent wearable products, people have a wider and wider demand for small-sized button secondary rechargeable batteries (button batteries for short). Button lithium ion batteries are one of the most widely used currently. Button lithium ion batteries are increasingly applied to intelligent wearable products.
In particular, hearing aids have come to have an explosive growth phase as the hearing aid OTC is released. The rechargeable batteries used in prior art hearing aids are typically manufactured in a wound configuration.
Disclosure of Invention
One of the purposes of the embodiment of the utility model is to provide a button type lithium ion battery, an electronic product and a hearing aid, and by adopting the technical scheme, the assembly work efficiency of the battery is improved. The electric capacity of the button cell is improved.
In a first aspect, this embodiment provides a button lithium ion battery, which is characterized by including: a positive electrode portion, a negative electrode portion, and a separator,
the positive electrode part and the negative electrode part respectively comprise three-dimensional netlike conductive frameworks, each conductive framework respectively comprises an active material area and a non-filling area,
the active material area of the positive electrode part is filled with positive electrode active material, the active material area of the negative electrode part is filled with negative electrode active material, the non-filled areas are free of active material, the conductive framework is exposed,
the positive electrode portion and the negative electrode portion filled with the active material are rolled into flat columns, each of the non-filled regions is a conductive sheet protruding from the active material region,
the diaphragm insulation interval is arranged between the opposite active material areas of the positive electrode part and the negative electrode part which are respectively in flat columnar shape,
the shell, positive pole portion, negative pole portion and diaphragm seal in the casing of shell, the active material district and the positive pole conducting strip of positive pole portion, the active material district and the negative pole conducting strip interval of negative pole portion are in the both sides of diaphragm, positive pole conducting strip, negative pole conducting strip are connected with the positive pole end, the negative pole end of the shell of its side respectively.
Optionally, the conductors on each conductive framework are in a three-dimensional staggered network.
Optionally, the conductor of the conductive skeleton of the positive electrode part is aluminum.
Optionally, the electric conductor of the conductive framework of the negative electrode part is nickel or copper.
Optionally, the active material area of the negative electrode part is positioned at the bottom of the shell and is adhered to the bottom of the shell, the diaphragm is positioned at the top surface of the negative electrode part, the negative electrode conductive sheet is bent to the bottom surface of the negative electrode part and is connected with the bottom of the shell,
the active material area of positive pole portion is located the top surface of diaphragm positive pole portion with the interval has the insulating layer between the casing, positive pole conducting strip is to the top surface of positive pole portion is buckled, the end with set up in the shell top of casing positive pole end is connected.
Optionally, the insulation layer is coated on the periphery of the active material area of the positive electrode part and the section, close to the root, of the positive electrode conductive sheet; or,
an insulating layer for spacing the positive electrode portion is provided on an inner wall of the case.
Optionally, the active material region of the negative electrode portion, the outer side Zhou Jun of the separator and the side wall of the case are affixed,
the outer periphery of the active material region of the positive electrode portion is attached to the side wall of the case through an insulating layer.
Optionally, the shell comprises a shell body provided with a shell opening and a top cover combined on the shell opening in a sealing way, the positive electrode end is combined on the top cover in a sealing way through an insulating piece, and the periphery of the top cover is connected with the shell opening in a sealing way.
Optionally, each conductive sheet extends from an outer edge of the active material region toward a surface of the active material region facing away from the separator.
In a second aspect, an electronic product provided by an embodiment of the present utility model includes: the button type lithium ion battery described in any one of the above is arranged in a power supply bin of the electronic product, and the electronic product can be, but is not limited to, a hearing aid.
From the above, it can be seen that, by adopting the schematic illustration of this embodiment, the current collectors of the positive electrode portion 100 and the negative electrode portion 200 are made of three-dimensional mesh conductive frameworks, and after the active material is filled, the active material regions with a certain thickness and the conductive sheets protruding from the outer edges of the active material regions to one surface (top surface or bottom surface) of the active material regions are obtained by rolling, so that when the button lithium ion battery is assembled, the edges of the flat columnar negative electrode active material regions 202 and the separator 3 are contacted with the side wall of the housing, the active material regions of the positive electrode portion 100 are contacted with the side wall of the housing through the insulating layers at intervals, and the positive alignment of the negative electrode portion 200, the separator 3 and the negative electrode portion 200 is positioned by using the housing, which is beneficial to improving the assembly efficiency.
In addition, the conductive sheet pressed by the non-filling area extends out of one surface of the active material area rather than laterally and radially, so that the occupied space of the conductive sheet connected with the electrode end of the shell in the shell is reduced, more space is reserved for the active material area contributing to the battery capacity, and the energy density of the unit volume of the button lithium ion battery is improved.
In addition, in this embodiment, the positive electrode portion 100 and the negative electrode portion 200 are made of three-dimensional mesh conductive frameworks, and the current collector is rich in voids, so that the thick electrode portion can be ensured to be made. The laminated body does not need to be prepared in advance before the shell is put into, and the structure of three-piece type direct-access shell assembly is adopted, so that the assembly efficiency of the button type lithium ion battery is improved, and the work efficiency is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate and together with the description serve to explain the utility model.
Fig. 1 is a schematic front view of an assembly structure of a button lithium ion battery according to an embodiment of the present utility model;
fig. 2 is a schematic perspective view of an assembly structure of a button lithium ion battery according to an embodiment of the present utility model.
Reference numerals:
100: a positive electrode section; 101: a positive electrode conductive sheet; 102: a positive electrode active material region;
200: a negative electrode portion; 201: a negative electrode conductive sheet; 202: a negative electrode active material region; 3: a diaphragm;
401: a housing; 402: a top cover;
500: a positive terminal;
Detailed Description
The present utility model will now be described in detail with reference to the drawings and the specific embodiments thereof, wherein the exemplary embodiments and descriptions of the present utility model are provided for illustration of the utility model and are not intended to be limiting.
Examples
See fig. 1-2.
The embodiment provides a button type lithium ion battery. It mainly comprises a housing, and a positive electrode part 100, a negative electrode part 200 and a separator 3 sealed in the housing.
In this embodiment, three-dimensional mesh conductive frameworks are used as current collectors of the positive electrode portion 100 and the negative electrode portion 200, respectively, and non-filled regions are reserved on the conductive frameworks, so that other portions except the filled regions are used as active material regions. Wherein the conductive backbone may be, but is not limited to, made using prior art techniques.
Filling lithium ion positive electrode active materials such as, but not limited to, lithium cobaltate, lithium manganate, lithium iron phosphate, ternary materials and the like in the internal gaps and the surfaces of the three-dimensional conductive framework of the positive electrode part 100; the internal voids and surfaces of the three-dimensional conductive skeleton of the negative electrode portion 200 are filled with a negative electrode active material, such as, but not limited to, graphite, or a silicon-carbon composite material.
After the active material is dried and solidified, the conductive framework is rolled to deform the conductive framework into a flat columnar shape with a certain thickness. The non-filled regions of the positive electrode portion 100 and the negative electrode portion 200 are respectively a positive electrode conductive sheet 101 and a negative electrode conductive sheet 201 with exposed conductors, respectively, and extend from the positive electrode active material region 102 and the negative electrode active material region 202, respectively, and are of an integrated structure with the active material regions.
In this embodiment, the positive electrode conductive sheet 101 and the negative electrode conductive sheet 201 are not made of active material, and in order to further improve the space utilization rate in the housing, the extended conductive sheet may be rolled further, so that the extended conductive sheet is further thinner than the thickness of the active material region, and the space occupation rate of the active material region in the housing is further reduced, so as to improve the space occupation rate of the active material region in the housing.
The separator 3 paper is cut to conform to the shape of the active material areas of the flat columnar positive electrode part 100, negative electrode part 200 and the size of the separator 3 paper is made equal to or slightly wider than the active material area of the negative electrode part 200. The size of the active material region of the flat columnar positive electrode portion 100 in the present embodiment is equal to or slightly smaller than that of the active material region of the negative electrode portion 200 to ensure that the active material region of the negative electrode portion 200 is opposed thereto everywhere of the active material region of the positive electrode portion 100, avoiding lithium precipitation due to positional displacement.
The casing of the button lithium ion battery of this embodiment includes a housing 401 and a top cover 402, where the top cover 402 is provided with a positive terminal 500, the positive terminal 500 is connected to the top cover 402 by sealing and bonding with an insulating member (not shown in the drawing), and the outer periphery of the top cover 402 is sealed and bonded at the opening of the housing 401, where the metal material of the top cover 402 and the metal material of the housing 401 may be, but not limited to, thermally fused together by laser welding.
As an illustration of the present embodiment, the case 401, the top cover 402, and the positive electrode terminal 500 of the present embodiment are each steel members.
The present embodiment also provides a three-piece type can-in assembly structure that is convenient to assemble, and insulating layers (not shown in the drawings), such as, but not limited to, an insulating paste, are respectively coated on the outer periphery of the positive electrode active material region 102 of the positive electrode part 100 and on the sections of the protruding conductive sheet near the root. Alternatively, but not limited to, an insulating layer may be sprayed on the side wall of the case 401 to insulate the positive electrode part 100 from the case 401.
During assembly, the conductive sheet extending out of the negative electrode part 200 is bent towards the bottom surface of the negative electrode part 200, is connected to the bottom of the shell, is placed in the negative electrode part 200, the negative electrode part 200 is positioned at the bottom of the shell, the periphery of the active material layer of the negative electrode part 200 is contacted with the side wall of the shell 401, and the shell 401 is taken as the negative electrode, so that the internal space of the shell is fully utilized; a diaphragm 3 is arranged, the diaphragm 3 covers the top surface of the negative electrode part 200, the periphery of the diaphragm 3 is contacted with the inner wall of the side wall of the shell 401, the negative electrode part 200 and the negative electrode conducting plate 201 are completely separated under the diaphragm 3, the tail end of the conducting plate of the positive electrode part 100 is connected with the top surface of the positive electrode end 500 on the top cover 402, the positive electrode conducting plate 101 is bent towards the top surface of the positive electrode part 100, the positive electrode part 100 is arranged (the periphery of the positive electrode part 100 is provided with an insulating layer or the inner wall of the shell 401 is provided with an insulating layer for insulating and isolating the positive electrode part 100), the bottom surface of the positive electrode part 100 is clung to the top surface of the diaphragm 3, the periphery of the positive electrode part 100 is contacted with the side wall of the shell 401 through the insulating layer,
the positive electrode part 100 and the negative electrode part 200 are formed in the case so as to be separated at both sides of the separator 3, and the conductive sheets of the positive electrode part 100 and the negative electrode part 200, which are connected to the positive electrode terminal 500 and the negative electrode terminal of the case, do not pass through the separator 3 and do not pass through the side surfaces of the electrode member of the other polarity, that is, the positive electrode part 100 and the negative electrode part 200 do not need to be occupied.
Electrolyte (not shown) is poured into the shell 401 through the shell opening, the electrolyte fills the stacked body therein, and the top cover 402 is sealed (which can be but is not limited to a laser welding mode) and combined with the shell opening through an insulating piece, so that the sealed button-type lithium ion battery is obtained.
As an illustration of this embodiment, but not limited to, a liquid injection hole may be provided on the top cover 402, so that the top cover 402 is sealed and combined with the shell opening through an insulating member before the electrolyte is injected, then the electrolyte is injected through the liquid injection hole, the liquid injection hole is sealed after the specialty, the sealing nail is covered on the liquid injection hole entirely, the liquid injection hole is activated for laser welding at a predetermined distance from the periphery of the liquid injection hole, an annular laser welding track is formed on the top surface of the sealing nail, and the liquid injection hole is sealed in the annular laser welding track. The technical scheme of the embodiment is beneficial to avoiding the influence of electrolyte on the sealing combination degree of the top cover 402 and the shell opening due to the pollution of the shell opening.
As an illustration of the present embodiment, the present embodiment may also be, but not limited to, employing a solid electrolyte, the solid electrolyte being preformed on the positive electrode portion, the negative electrode portion, and the separator. In particular, but not limited to, prior art techniques may be employed.
As an illustration of this embodiment, the conductive skeleton of this embodiment is made of a metal material. For example, the conductive skeleton of the positive electrode part 100 is made of aluminum, and the conductive skeleton of the negative electrode part 200 is made of nickel or copper.
Before the active material is filled, the metal wires on the conductive framework are in a three-dimensional net staggered shape, and rich and uniform gaps are formed on the conductive framework so as to fill the active material as abundantly and uniformly as possible, thereby improving the capacity of the button lithium ion battery.
As can be seen from the above, with the schematic illustration of this embodiment, the current collectors of the positive electrode portion 100 and the negative electrode portion 200 in this embodiment are made of three-dimensional mesh conductive frameworks, and after the active material is filled, the active material regions are rolled to obtain flat columnar active material regions with a certain thickness and conductive sheets extending from the outer edges of the active material regions to one surface (top surface or bottom surface) of the active material regions, so that when the button lithium ion battery is assembled, the edges of the flat columnar negative electrode active material regions 202 and the separator 3 are in contact with the side walls of the housing, the active material regions of the positive electrode portion 100 are in contact with the side walls of the housing through the spaced insulating layers, and the housing is utilized to position the positive alignment of the negative electrode portion 200, the separator 3 and the negative electrode portion 200, thereby being beneficial to improving the assembly efficiency.
In addition, the conductive sheet pressed by the non-filling area extends out of one surface of the active material area rather than laterally and radially, so that the occupied space of the conductive sheet connected with the electrode end of the shell in the shell is reduced, more space is reserved for the active material area contributing to the battery capacity, and the energy density of the unit volume of the button lithium ion battery is improved.
In addition, in this embodiment, the positive electrode portion 100 and the negative electrode portion 200 are made of three-dimensional mesh conductive frameworks, and the current collector is rich in voids, so that the thick electrode portion can be ensured to be made. The laminated body does not need to be prepared in advance before the shell is put into, and the structure of three-piece type direct-access shell assembly is adopted, so that the assembly efficiency of the button type lithium ion battery is improved, and the work efficiency is improved.
The button lithium ion battery of the embodiment is particularly suitable for wearable electronic products such as hearing aids, and the adoption of the structure is beneficial to improving the capacity of the battery as much as possible on the basis of limited capacity of a power supply bin.
The above-described embodiments do not limit the scope of the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present utility model.
Claims (10)
1. A button lithium ion battery, comprising: a positive electrode portion, a negative electrode portion, and a separator,
the positive electrode part and the negative electrode part respectively comprise three-dimensional netlike conductive frameworks, each conductive framework respectively comprises an active material area and a non-filling area,
the active material area of the positive electrode part is filled with positive electrode active material, the active material area of the negative electrode part is filled with negative electrode active material, the non-filled areas are free of active material, the conductive framework is exposed,
the positive electrode portion and the negative electrode portion filled with the active material are rolled into flat columns, each of the non-filled regions is a conductive sheet protruding from the active material region,
the diaphragm insulation interval is arranged between the opposite active material areas of the positive electrode part and the negative electrode part which are respectively in flat columnar shape,
the shell, positive pole portion, negative pole portion and diaphragm seal in the casing of shell, the active material district and the positive pole conducting strip of positive pole portion, the active material district and the negative pole conducting strip interval of negative pole portion are in the both sides of diaphragm, positive pole conducting strip, negative pole conducting strip are connected with the positive pole end, the negative pole end of the shell of its side respectively.
2. The button lithium ion battery of claim 1, wherein the button lithium ion battery comprises a battery cell,
the conductors on the conductive frameworks are in a three-dimensional staggered network.
3. The button lithium ion battery of claim 1, wherein the button lithium ion battery comprises a battery cell,
the electric conductor of the conductive framework of the positive electrode part is aluminum.
4. The button lithium ion battery of claim 1, wherein the button lithium ion battery comprises a battery cell,
the electric conductor of the conductive framework of the negative electrode part is nickel or copper.
5. The button lithium ion battery of claim 1, wherein the button lithium ion battery comprises a battery cell,
the active material area of the negative electrode part is positioned at the bottom of the shell and is adhered to the bottom of the shell, the diaphragm is positioned at the top surface of the negative electrode part, the negative electrode conducting strip is bent to the bottom surface of the negative electrode part and is connected with the bottom of the shell,
the active material area of positive pole portion is located the top surface of diaphragm positive pole portion with the interval has the insulating layer between the casing, positive pole conducting strip is to the top surface of positive pole portion is buckled, the end with set up in the shell top of casing positive pole end is connected.
6. The button lithium ion battery of claim 5, wherein the button lithium ion battery comprises a battery cell,
the periphery of the active material area of the positive electrode part and the section, close to the root part, of the positive electrode conducting plate are coated with the insulating layer; or,
an insulating layer for spacing the positive electrode portion is provided on an inner wall of the case.
7. The button lithium ion battery of claim 5, wherein the button lithium ion battery comprises a battery cell,
the active material region of the negative electrode portion and the outer side Zhou Jun of the separator are attached to the side wall of the case,
the outer periphery of the active material region of the positive electrode portion is attached to the side wall of the case through an insulating layer.
8. The button lithium ion battery of claim 5, wherein the button lithium ion battery comprises a battery cell,
the shell comprises a shell body provided with a shell opening and a top cover which is combined on the shell opening in a sealing mode, the positive electrode end is combined on the top cover in a sealing mode through an insulating piece, and the periphery of the top cover is connected with the shell opening in a sealing mode.
9. The button lithium ion battery of claim 1, wherein the button lithium ion battery comprises a battery cell,
each conductive sheet extends from the outer edge of the active material region to the surface of the active material region facing away from the separator.
10. An electronic product, comprising: a button-type lithium ion battery according to any one of claims 1 to 8 is arranged in a power supply compartment of the electronic product, which can be, but is not limited to, a hearing aid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322146670 | 2023-08-09 | ||
| CN2023221466701 | 2023-08-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220652069U true CN220652069U (en) | 2024-03-22 |
Family
ID=90291742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322259766.9U Active CN220652069U (en) | 2023-08-09 | 2023-08-22 | Button type lithium ion battery, electronic product and hearing aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220652069U (en) |
-
2023
- 2023-08-22 CN CN202322259766.9U patent/CN220652069U/en active Active
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