CN218300000U - Cover plate assembly and button cell - Google Patents
Cover plate assembly and button cell Download PDFInfo
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- CN218300000U CN218300000U CN202222397624.4U CN202222397624U CN218300000U CN 218300000 U CN218300000 U CN 218300000U CN 202222397624 U CN202222397624 U CN 202222397624U CN 218300000 U CN218300000 U CN 218300000U
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- cover plate
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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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Abstract
The utility model belongs to the technical field of the lithium cell, especially, relate to an apron subassembly and button cell, the apron subassembly includes the cover plate, the insulating layer, utmost point post and sealing member, be equipped with the through-hole on the cover plate, utmost point post passes through the insulating layer with the cover plate and is connected, be equipped with on the utmost point post and annotate the liquid hole, it corresponds with the through-hole position to annotate the liquid hole, annotate the liquid hole and include big footpath hole section and path hole section, big footpath hole section is connected with path hole section, the cross sectional area of big footpath hole section is greater than the cross sectional area of path hole section, with the junction at the two forms the step face, the sealed assembly of sealing member is in annotating the liquid hole. The liquid injection hole is arranged on the pole column, so that the miniaturization design of the cover plate assembly is facilitated, and for small-size button cells, the liquid injection hole is arranged on the pole column due to the fact that the size of the cover plate is small, the liquid injection hole is convenient to process, and the improvement of the structural stability and the reliability of the whole cover plate assembly and the button cell where the cover plate assembly is located are facilitated.
Description
Technical Field
The utility model belongs to the technical field of the lithium cell, especially, relate to an apron subassembly and button cell.
Background
Button cells are also called button cells, and refer to cells with the overall dimension like a button, and the button cells have larger diameter and thinner thickness compared with columnar cells. Button cell generally includes casing and electric core, and electric core is located the casing, and the casing includes apron subassembly and shell, and the shell is connected with the apron subassembly, and the apron subassembly includes utmost point post and cover plate, when guaranteeing utmost point post and cover plate insulation, utmost point post and cover plate generally are connected through the riveting mode.
The prior art discloses a button cell, which is characterized in that a cover plate is provided with a through hole, a pole column is hermetically connected with the cover plate through an insulating layer, and a liquid injection hole is arranged beside the through hole on the cover plate so as to inject battery liquid into the button cell through the liquid injection hole.
However, for the button cell with a smaller diameter, because the area of the cover plate is limited, it is difficult to separately open the liquid injection hole on the cover plate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the technical problem that a liquid injection hole in the existing button cell is difficult to process, a cover plate assembly and the button cell are provided.
In order to solve the above technical problem, an embodiment of the present invention provides a cover plate assembly, which includes a cover plate, an insulating layer, a pole, and a sealing member, wherein the cover plate is provided with a through hole, and the pole is connected to the cover plate through the insulating layer in a sealing manner;
the post is provided with a liquid injection hole which penetrates through the post from top to bottom, the liquid injection hole corresponds to the through hole in position and comprises a large-diameter hole section and a small-diameter hole section, the large-diameter hole section is connected with the small-diameter hole section, the cross-sectional area of the large-diameter hole section is larger than that of the small-diameter hole section, a step surface is formed at the joint of the large-diameter hole section and the small-diameter hole section, and the sealing element is assembled in the liquid injection hole in a sealing mode.
Optionally, the sealing element is hermetically fitted in the large-diameter hole section, and the end face of the sealing element, which is used for facing the interior of the button cell, is located above the step face.
Optionally, the pole includes a first column and a second column, the second column is connected to an intermediate position of the first column, and a cross-sectional area of the first column is larger than that of the second column, so that an outer edge of the first column protrudes out of an outer circumferential surface of the second column, and the liquid injection hole is located at a central position of the second column;
the first cylinder is located one side of the cover plate, the first cylinder is connected with the cover plate in a sealing mode through the insulating layer, the second cylinder penetrates through the through hole, and a gap is reserved between the peripheral face of the second cylinder and the wall face of the through hole.
Optionally, the first cylinder and the second cylinder are both cylinders, the large-diameter hole section and the small-diameter hole section are both cylindrical holes, the outer diameter of the second cylinder is 2-5mm, and the inner diameter of the large-diameter hole section is 0.5-4.5mm.
Optionally, the inner diameter of the small diameter hole section is 0.4-4mm.
Optionally, the sealing member is a metal sealing member or an integral sealing rubber block or a sealing rubber plug, the metal sealing member is welded to the edge of an opening of the end part of the liquid injection hole, the opening of the end part of the liquid injection hole is used for facing the outside of the button cell, and the end face of the metal sealing member, which is used for facing the inside of the button cell, is bonded to the step face through a rubber layer.
Optionally, the insulating layer is an insulating glue layer, and the insulating glue layer includes a horizontal glue layer, a vertical glue layer and an overflow glue layer;
the vertical glue layer is connected to the middle position of the transverse glue layer, and the transverse glue layer is positioned between the cover plate and the first column body;
the vertical glue layer is positioned in the gap, and the height of the vertical glue layer in the vertical direction is higher than that of the cover plate;
the overflow adhesive layer is connected with the vertical adhesive layer, and the overflow adhesive layer is bonded with the side surface of the cover plate, which is back to the transverse adhesive layer.
According to the utility model discloses the apron subassembly will annotate the liquid hole setting on utmost point post, helps realizing the miniaturized design of apron subassembly to small-size button cell, because the cover plate size is less, will annotate the liquid hole setting on utmost point post, conveniently annotate the processing in liquid hole, help improving whole apron subassembly and the button cell's at apron subassembly place structural stability and reliability.
On the other hand, the embodiment of the utility model provides a still provide a button cell, including casing and electric core, the electric core is located in the casing, the casing includes shell and foretell apron subassembly, the shell with the cover plate is connected.
Optionally, a tab is arranged on the battery cell, the tab is connected with the pole column, the tab is provided with a central through hole, and the central through hole corresponds to the liquid injection hole.
Optionally, the small-diameter hole section is connected to one end of the large-diameter hole section, which is used for facing the inside of the button cell, and the tab is in a circular-ring-shaped sheet structure.
Drawings
Fig. 1 is a schematic structural view of a button cell provided in a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cover plate assembly according to a first embodiment of the present invention;
fig. 3 is a schematic diagram showing a positional relationship between a tab and a post in a button cell according to a first embodiment of the present invention (dotted lines in the figure indicate the contour line of the inner wall surface of the large-diameter hole section of the injection hole).
The reference numerals in the specification are as follows:
1. a cover sheet; 2. an insulating layer; 21. a transverse glue layer; 22. a vertical glue layer; 23. the glue layer overflows; 3. a pole column; 31. a first column; 32. a second cylinder; 33. a liquid injection hole; 331. a large-diameter hole section; 332. a small diameter bore section; 4. a seal member; 5. a positive electrode tab; 6. an electric core; 7. a housing; 8. and a negative electrode tab.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
First embodiment
As shown in fig. 1 and fig. 2, the button cell battery in this embodiment includes a casing and a cell 6, the cell 6 is located in the casing, the casing includes a cover plate assembly and a housing 7, the cover plate assembly includes a cover plate 1, an insulating layer 2, a pole 3 and a sealing member 4, the casing is connected with the cover plate 1, and the cover plate 1 is provided with a through hole.
The post 3 is provided with a liquid injection hole 33 which penetrates up and down, the liquid injection hole 33 corresponds to the through hole in position, the liquid injection hole 33 comprises a large-diameter hole section 331 and a small-diameter hole section 332, one end of the large-diameter hole section, which faces the inside of the button cell, is connected with the small-diameter hole section, the cross-sectional area of the large-diameter hole section 331 is larger than that of the small-diameter hole section 332, so that a step surface is formed at the joint of the large-diameter hole section 331 and the small-diameter hole section 332, and the sealing element 4 is hermetically assembled in the liquid injection hole.
Specifically, as shown in fig. 1 and fig. 2, the housing is of a cylindrical structure, the cover sheet 1 is of a stainless steel sheet, the cover sheet 1 is of a circular sheet structure, the housing is welded to the edge of the cover sheet 1 in a sealing manner, the radial section of the pole 3 is of an inverted "T" -shaped structure, the pole 3 comprises a first cylinder 31 and a second cylinder 32, the bottom end of the second cylinder 32 facing the inside of the button cell is connected to the middle position of the top of the first cylinder 31, the sectional area of the first cylinder 31 is larger than that of the second cylinder 32, so that the outer edge of the first cylinder 31 protrudes out of the outer peripheral surface of the second cylinder 32, the first cylinder 31 is located on one side of the cover sheet 1 facing the inside of the button cell, that is, the first cylinder 31 is located on the lower side of the cover sheet 1, the second cylinder 32 penetrates through holes, and a gap is reserved between the outer peripheral surface of the second cylinder 32 and the hole wall surface of the through holes.
In this embodiment, as shown in fig. 2, a single-side radial cross section of the insulating adhesive layer is "L" shaped, the insulating adhesive layer includes a horizontal adhesive layer 21 and a vertical adhesive layer 22, the horizontal adhesive layer 21 extends in the horizontal direction, the vertical adhesive layer 22 extends in the vertical direction, the vertical adhesive layer 22 is located on the upper side of the horizontal adhesive layer 21, the horizontal adhesive layer 21 is located between the cover sheet 1 and the first column 31, and the vertical adhesive layer 22 is located in the gap between the cover sheet 1 and the second column 32.
The upper surface of cover plate 1 is less than the upper surface of utmost point post 3, and vertical glue film 22 is higher than the height of cover plate 1 in the upper and lower ascending height to improve the insulating properties between cover plate 1 and the utmost point post 3. The insulating glue film still includes excessive glue film 23, and excessive glue film 23 is located vertical glue film 22 upside and is connected with vertical glue film 22, and excessive glue film 23 is located the upside of cover plate 1 and the upper surface and the cover plate 1 upper surface bonding of excessive glue film 23 to cover plate 1 is in the insulating glue in the inner parcel of radial ascending, avoids cover plate 1 and 3 contacts of utmost point post and leads to button cell short circuit, helps improving apron subassembly and button cell's reliability.
In this embodiment, as shown in fig. 2, the injection hole 33 is provided at the center of the pole 3, the large-diameter hole section 331 and the small-diameter hole section 332 are both cylindrical holes, the outer diameter of the second column 32 of the pole 3 is 5mm, the inner diameter of the large-diameter hole section 331 of the injection hole 33 is 4.5mm, and the inner diameter of the small-diameter hole section 332 is 4mm. The sealing element 4 is a metal sealing element, specifically, the metal sealing element is a sealing aluminum block, and after the liquid is injected into the button cell, the sealing aluminum block is sealed in the hole opening of the liquid injection hole 33 by gluing and welding to avoid liquid leakage. The radial cross-section of sealed aluminium pig is "T" font, including the horizontal part that is located the upside and the vertical part that is located the downside, the horizontal part is located the upside of 3 upper surfaces of utmost point post, the edge of horizontal part and the upper end drill way welding of annotating liquid hole 33, vertical part stretches into in annotating the big footpath hole section 331 of liquid hole 33, reserve the clearance between the lower terminal surface of vertical part and the step face in annotating liquid hole 33, so that the lower terminal surface of whole sealed aluminium pig is located the step face top, the above-mentioned clearance is passed through the PP glue film and is filled, make to bond through the glue film between the lower terminal surface of sealed aluminium pig and the step face, in order to improve the sealing performance of sealed aluminium pig and notes liquid hole 33, and then improve apron subassembly and button cell's structural reliability.
As shown in fig. 2, the provision of the gap between the lower end surface of the aluminum seal block and the step surface helps ensure that the lower end surface of the horizontal portion of the aluminum seal block is attached to the end surface of the upper end orifice of the liquid injection hole 33, so as to facilitate welding, avoid poor sealing between the aluminum seal block and the liquid injection hole 33, and help improve the sealing performance between the aluminum seal block and the liquid injection hole 33.
In this embodiment, as shown in fig. 2, the upper surface of the insulating adhesive layer is higher than the upper surface of the terminal 3 in the up-down direction, so as to improve the insulating reliability of the cover plate assembly, and the upper surface of the sealing aluminum block is higher than the upper surface of the insulating adhesive layer, so as to prevent the insulating adhesive layer from overflowing towards the upper surface of the terminal 3 to affect the conductivity of the cover plate assembly.
In this embodiment, as shown in fig. 1 to fig. 3, a positive electrode tab 5 and a negative electrode tab 8 are arranged on the electric core 6, the negative electrode tab 8 is connected with the housing 7, the positive electrode tab 5 has a connecting section, the connecting section of the positive electrode tab 5 is welded to the lower surface of the electrode post 3, the connecting section is a circular ring-shaped sheet structure, a central through hole of the connecting section corresponds to a lower side orifice of the liquid injection hole 33 on the electrode post 3 in the up-down direction, so as to ensure smooth liquid injection and increase the connection area between the positive electrode tab 5 and the electrode post 3.
In the button cell provided by the embodiment, the liquid injection hole 33 is arranged at the central position of the second column body 32, so that for the button cell structure with a small cover plate size, the processing of the liquid injection hole on the pole is convenient, the miniaturization design of the cover plate assembly and the whole button cell is facilitated, the inner diameter of the upper side hole of the liquid injection hole 33 is large, and the liquid injection into the button cell is convenient through the upper side hole opening of the liquid injection hole 33; moreover, the inner diameter of the lower side hole of the liquid injection hole 33 is smaller, a larger space for connecting the positive electrode tab 5 can be reserved on the lower surface of the pole 3, the connecting section of the positive electrode tab 5 is set to be in an annular structure, the central through hole of the annular structure corresponds to the liquid injection hole 33, the connecting area of the positive electrode tab 5 and the pole 3 is increased, the connecting strength of the positive electrode tab 5 and the pole 3 is improved, and the reliability and the structural stability of the whole cover plate assembly and the button cell are improved.
It should be noted that in other embodiments, the whole cover plate assembly may be turned over, that is, the first column is located on the upper side of the cover plate, and the positive electrode tab is connected to the lower end face of the second column on the electrode post.
Second embodiment
The utility model discloses button cell of second embodiment, its difference with first embodiment lies in, and the external diameter of the second post body of utmost point post is 2mm, and the internal diameter of annotating the major diameter hole section of liquid hole is 0.5mm, and the internal diameter of minor diameter hole section is 0.4mm to make button cell and apron subassembly reach the design requirement of smaller-size.
Third embodiment
The utility model discloses button cell of third embodiment, its difference with first embodiment lies in, and the external diameter of the second post body of utmost point post is 3mm, and the internal diameter of annotating the big footpath hole section of liquid hole is 2.5mm, and the internal diameter of path hole section is 2mm to satisfy button cell and the small-size designing requirement of apron subassembly.
In other embodiments, the second column has an outside diameter of another dimension in the range of 2mm to 5mm, the corresponding large-diameter section of the pour hole has an inside diameter of another dimension in the range of 0.5mm to 4.5mm, and the small-diameter section has an inside diameter of another dimension in the range of 0.4mm to 4mm.
Or in other embodiments, the outer diameter of the second column is in the range of 2mm to 5mm, the inner diameter of the large-diameter hole section of the liquid injection hole is in the range of 0.5mm to 4.5mm, and the inner diameter of the small-diameter hole section is not limited as long as the requirement that the inner diameter of the small-diameter hole section is smaller than that of the large-diameter hole section is met and battery liquid can pass through the small-diameter hole section is met.
Or in other embodiments, the specification and the size of the second column body and the liquid injection hole on the pole are not limited, as long as the inner diameter of the small-diameter hole section is smaller than that of the large-diameter hole section, and the inner diameter of the large-diameter hole section is smaller than the outer diameter of the second column body.
Fourth embodiment
The utility model discloses button cell of fourth embodiment, its difference with first embodiment lies in, and sealed aluminium pig also seals through the encapsulation of PP glue film with annotating the upside drill way terminal surface in liquid hole.
Fifth embodiment
The utility model discloses button cell of fifth embodiment, its difference with first embodiment lies in, because utmost point post size is less with annotating liquid hole size, in this embodiment, in order to facilitate the assembly, cancel the setting of sealed aluminium piece, it is integral sealant piece to set up the sealing member, specifically, integral sealant piece is glued for the UV that solidifies, the battery at apron subassembly place annotates the liquid back, it sets up the UV and glues annotating liquid hole position department, it stretches into in annotating the big footpath hole section in liquid hole after the UV glues solidification, annotate the liquid hole with the shutoff, help improving the sealing performance that the UV glued and annotate the liquid hole.
In other embodiments, in order to facilitate the assembly, the setting of cancellation sealed aluminium piece sets up the sealing member for sealed plug, sealed plug and annotate the sealed cooperation of liquid hole, and the lower extreme of sealed plug towards button cell stretches into in the path hole section to the hole is annotated in the shutoff, improves the sealing performance who annotates the liquid hole.
Sixth embodiment
The utility model discloses button cell of sixth embodiment, its difference with the first embodiment lies in that, the insulating glue film only includes horizontal glue film, cancels the setting of vertical glue film and excessive glue film, and the preformed gap between the hole wall of through-hole satisfies the cover plate on the second cylinder global and the cover plate and utmost point post is insulating.
Seventh embodiment
The utility model discloses button cell of seventh embodiment, its difference with the first embodiment lies in, and the insulating glue film only includes horizontal glue film and vertical glue film, the setting of cancellation excessive glue film, and vertical glue film highly is higher than the height of cover plate in upper and lower side to it is insulating with the cover plate to satisfy utmost point post.
In other embodiments, the insulating glue layer only comprises the transverse glue layer and the vertical glue layer, the arrangement of the excessive glue layer is omitted, the height of the cover plate in the vertical direction is higher than that of the vertical glue layer, and the upper end face of the vertical glue layer is located on the upper side of the upper end face of the pole.
Eighth embodiment
The utility model discloses button cell of eighth embodiment, its difference with first embodiment lies in, and the linkage segment of anodal utmost point ear is square sheet structure, and the linkage segment welding is at the side of the notes liquid hole of utmost point post, because annotate liquid hole downside for the less path hole section of hole, can reserve great confession linkage segment welded space at utmost point post lower surface, avoids contact failure, helps increasing the welding area and the joint strength of anodal utmost point ear and utmost point post, improves the reliability and the structural stability of battery.
Ninth embodiment
The utility model discloses button cell of ninth embodiment, its difference with first embodiment lies in, and the linkage segment of anodal utmost point ear is sheet structure, and its outline is the dysmorphism, is equipped with the through-hole on the linkage segment, and central through-hole corresponds with the lower extreme drill way of annotating the liquid hole, and this kind of structure setting also helps increasing the welding area and the joint strength of anodal utmost point ear and utmost point post, improves the reliability and the structural stability of battery.
Tenth embodiment
The utility model discloses button cell of tenth embodiment, its difference with first embodiment lies in, the setting of the second post body of taking away in the utmost point post, utmost point post only includes first cylinder, and first cylinder is located the outside one side of button cell of orientation of cover plate, and utmost point post is located the upside of cover plate promptly, through horizontal glue film sealing connection between utmost point post and the cover plate, the setting of cancellation vertical glue film and excessive glue film, annotate the liquid hole and set up on first cylinder, positive pole utmost point ear pass the through-hole on the cover plate and with the lower terminal surface welding of first cylinder.
The embodiment of the utility model also provides a cover plate assembly, the structure of this cover plate assembly and any embodiment in the above-mentioned first embodiment to tenth embodiment in the structure of cover plate assembly among the button cell the same, no longer describe here.
It should be noted that the embodiment of the present invention provides a cover plate assembly that can be used in not only button cell batteries but also secondary cylindrical batteries.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A cover plate assembly comprises a cover plate, an insulating layer, a pole and a sealing element, wherein the cover plate is provided with a through hole;
the post is provided with a liquid injection hole which penetrates through the post from top to bottom, the liquid injection hole corresponds to the through hole in position and comprises a large-diameter hole section and a small-diameter hole section, the large-diameter hole section is connected with the small-diameter hole section, the cross-sectional area of the large-diameter hole section is larger than that of the small-diameter hole section, a step surface is formed at the joint of the large-diameter hole section and the small-diameter hole section, and the sealing element is assembled in the liquid injection hole in a sealing mode.
2. The cover plate assembly of claim 1, wherein the seal is sealingly fitted within the large diameter bore section, the end face of the seal for facing the interior of a button cell being above the step face.
3. The lid assembly according to claim 1, wherein the post comprises a first post and a second post, the second post is connected to an intermediate position of the first post, the cross-sectional area of the first post is larger than that of the second post, so that an outer edge of the first post protrudes out of an outer circumferential surface of the second post, and the liquid injection hole is located at a central position of the second post;
the first cylinder is located on one side of the cover plate, the first cylinder is connected with the cover plate in a sealing mode through the insulating layer, the second cylinder penetrates through the through hole, and a gap is reserved between the outer peripheral face of the second cylinder and the wall face of the through hole.
4. The cover plate assembly of claim 3, wherein the first and second cylinders are cylindrical, the large diameter bore section and the small diameter bore section are cylindrical bores, the second cylinder has an outer diameter of 2-5mm, and the large diameter bore section has an inner diameter of 0.5-4.5mm.
5. The cover plate assembly of claim 4, wherein the small bore section has an inner diameter of 0.4-4mm.
6. The cover plate assembly according to any one of claims 1 to 5, wherein the sealing element is a metal sealing element or an integral sealing rubber block or a sealing rubber plug, the metal sealing element is welded with the edge of the opening of the end part of the liquid injection hole, which is used for facing the outside of the button cell, and the end surface of the metal sealing element, which is used for facing the inside of the button cell, is bonded with the step surface through a rubber layer.
7. The cover plate assembly according to any one of claims 3 to 5, wherein the insulating layer is an insulating glue layer, the insulating glue layer comprising a transverse glue layer, a vertical glue layer and an overflow glue layer;
the vertical adhesive layer is connected to the middle position of the transverse adhesive layer, and the transverse adhesive layer is positioned between the cover plate and the first column body;
the vertical glue layer is positioned in the gap, and the height of the vertical glue layer in the vertical direction is higher than that of the cover plate;
the overflow glue layer is connected with the vertical glue layer, and the overflow glue layer is bonded with the side surface of the cover plate, which is back to the transverse glue layer.
8. A button cell battery comprising a casing and a cell, the cell being located in the casing, the casing comprising a cover plate assembly and a housing, wherein the cover plate assembly is as claimed in any one of claims 1 to 7, and the housing is connected to the cover plate.
9. The button cell according to claim 8, wherein a tab is provided on the electric core, the tab is connected to the pole, the tab has a central through hole, and the central through hole corresponds to the electrolyte injection hole.
10. The button cell according to claim 9, wherein the small-diameter hole section is connected to one end of the large-diameter hole section facing the inside of the button cell, and the tab is in a circular-ring-shaped sheet structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222397624.4U CN218300000U (en) | 2022-09-08 | 2022-09-08 | Cover plate assembly and button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222397624.4U CN218300000U (en) | 2022-09-08 | 2022-09-08 | Cover plate assembly and button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218300000U true CN218300000U (en) | 2023-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222397624.4U Active CN218300000U (en) | 2022-09-08 | 2022-09-08 | Cover plate assembly and button cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218300000U (en) |
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2022
- 2022-09-08 CN CN202222397624.4U patent/CN218300000U/en active Active
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