CN218827492U - Cover plate assembly and button cell - Google Patents
Cover plate assembly and button cell Download PDFInfo
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- CN218827492U CN218827492U CN202222396932.5U CN202222396932U CN218827492U CN 218827492 U CN218827492 U CN 218827492U CN 202222396932 U CN202222396932 U CN 202222396932U CN 218827492 U CN218827492 U CN 218827492U
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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
Abstract
The utility model belongs to the technical field of batteries, in particular to a cover plate component and a button cell, which comprises a cover plate, a pole and an insulating glue layer; the pole comprises a first column body and a second column body, and the sectional area of the second column body is larger than that of the first column body; the cover plate is provided with a through hole, the cover plate is sleeved on the first cylinder through the through hole, a first gap is formed between the inner wall of the through hole and the outer peripheral wall of the first cylinder, and a second gap is formed between the bottom surface of the cover plate and the top surface of the second cylinder; the insulating glue layer includes first glue film and excessive glue film, and excessive glue layer includes middle glue film, and middle glue film is connected to first glue film and encircles middle glue film, and middle glue film encircles first cylinder, and first clearance is filled with in the middle glue film part at least in order to bond apron and first cylinder, and first glue film part at least fills the second clearance and in order to bond apron and second cylinder. According to the utility model discloses apron subassembly, first clearance and second clearance are all filled by insulating glue layer, reduce the probability that the foreign matter got into.
Description
Technical Field
The utility model belongs to the technical field of the battery, especially, relate to an apron subassembly and button cell.
Background
The battery can be divided into a cylindrical battery and a button battery according to the shape, the button battery is also called a button battery, and the button battery is a battery with the external dimension like a small button, and generally the button battery has a larger diameter and a thinner thickness; the cylindrical battery is divided into a dry battery and a secondary battery, and the shapes of the dry battery and the secondary battery are not greatly different and are cylindrical.
No matter be cylindrical battery or button cell, the insulating glue film of the two all sets up comparatively complicatedly, and perhaps insulating glue film is direct to be overlapped outside utmost point post, perhaps forms insulating glue film through some glue processes, and above-mentioned two kinds of modes make very easily to have the gap between button cell's utmost point post and the apron.
Dust enters the gap when the battery is used daily, and external short circuit of the battery is easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the problem of battery's outside short circuit is caused to this gap of dust entering when battery daily use, provides a apron subassembly and button cell.
In order to solve the above technical problem, on one hand, an embodiment of the present invention provides a cover plate assembly, including a cover plate, a pole and an insulating glue layer;
the pole comprises a first column body and a second column body, one end of the first column body is connected to the end face of the second column body, and the sectional area of the second column body is larger than that of the first column body, so that the outer edge of the second column body protrudes out of the peripheral face of the first column body;
the cover plate is provided with a through hole, the cover plate is sleeved on the first cylinder through the through hole, a first gap is formed between the inner wall of the through hole and the outer peripheral wall of the first cylinder, a second gap is formed between the cover plate and the surface of the opposite side of the second cylinder, and the second gap transversely extends inwards to the outer peripheral surface of the first cylinder so as to be communicated with the first gap;
the insulation adhesive layer comprises a first adhesive layer and an overflow adhesive layer, the overflow adhesive layer comprises a middle adhesive layer, the first adhesive layer is connected with the middle adhesive layer, the middle adhesive layer surrounds the first column, at least part of the middle adhesive layer fills the first gap to bond the cover plate and the first column, and at least part of the first adhesive layer fills the second gap to bond the cover plate and the second column.
Optionally, the middle adhesive layer fills the first gap, the overflow adhesive layer further includes a second adhesive layer, the second adhesive layer is connected to one side of the middle adhesive layer away from the second pillar, the second adhesive layer has a protruding adhesive edge protruding transversely from the middle adhesive layer, and the protruding adhesive edge and the first adhesive layer are respectively disposed on two opposite sides of the cover plate.
Optionally, the end part of the first column body far away from the second column body protrudes relative to the second glue layer
Optionally, the insulating glue layer is of an integral structure, and the insulating glue layer is coated on the hot melt adhesive on the surface, close to one side of the second cylinder, of the cover plate through extrusion, so that the hot melt adhesive overflows and forms through the first gap.
Optionally, the first adhesive layer extends along the radial direction of the pole; the diameter of apron is greater than the diameter of first glue film, the diameter of first glue film is greater than the diameter of second cylinder.
Optionally, first cylinder with the second cylinder is the cylinder, the apron is discoid, first glue film is filled with the second clearance, also when radially outwards extending in the outer peripheral face of first glue film towards keeping away from the direction of apron extends in order to form the bulge, the bulge in the second cylinder is kept away from one side of first cylinder, the inside wall laminating of bulge the outer peripheral face of second cylinder, the bulge with first glue film forms the holding tank, part the second cylinder is internal to be arranged in the holding tank.
Optionally, the first cylinder and the second cylinder are both cylinders, the cover plate is disc-shaped, the first gap is filled with the intermediate adhesive layer, the second gap is filled with the first adhesive layer, the diameter of the first cylinder is R, the thickness of the inner side and the outer side of the intermediate adhesive layer is D, projections of the first adhesive layer, the second cylinder and the cover plate along the axis direction of the second cylinder respectively have an overlapping region, the length of the inner side and the outer side of the overlapping region is L, the outer circumferential surface of the first adhesive layer extends radially outward while extending in a direction away from the cover plate to form a protruding portion, a sidewall of the protruding portion is attached to the outer circumferential surface of the second cylinder, the protruding portion and the first adhesive layer form an accommodating groove, a part of the second cylinder is disposed in the accommodating groove, the thickness of the protruding portion is a, the thickness of the first adhesive layer is C, the thickness of the cover plate is H, and the height of the intermediate adhesive layer is B;
the volume of the middle glue layer is V, then V = pi x ((R + D) 2 -R 2 )×B；
The volume of the accommodating groove is M, and then M = pi x ((R + D + L) 2 -R 2 )×A×(1-C/A)；
V is less than or equal to M, and B is less than or equal to H.
Optionally, the value of C/a is 0.8 to 0.9; v is 0.5 times or less of M.
Optionally, D is greater than or equal to 0.2mm, and B is greater than or equal to 0.2mm.
Optionally, D is 0.2mm to 0.3mm and B is 0.2mm to 0.25mm.
Optionally, V is less than or equal to 0.3 xM, and the thickness C of the first glue layer is more than 0.08 mm.
According to the utility model discloses apron subassembly, first clearance and second clearance are all filled by insulating glue film to block the probability that dust moisture got into the apron subassembly, improve the success rate of battery in the high temperature and high humidity test, and because insulating glue film separates utmost point post and apron complete, increased insulating effect, reduce the emergence of the phenomenon such as the battery from discharging unusually, short circuit.
On the other hand, the embodiment of the utility model provides a button cell is still provided, including any one of above-mentioned apron subassembly, utmost point core and casing, the casing is fixed connection in the apron, the casing with the apron encloses and holds the chamber, the utmost point core sets up in holding the intracavity; the pole piece comprises any one of the cover plate assembly, the pole piece and the shell, wherein the shell is fixedly connected to the cover plate, an accommodating cavity is defined by the shell and the cover plate, and the pole piece is arranged in the accommodating cavity;
the second cylinder is located and holds the intracavity just the up end of first cylinder is located and holds the chamber outside, or, first cylinder is located and holds the intracavity just the second cylinder is located and holds the chamber outside.
Drawings
Fig. 1 is a schematic half-sectional view of a cover plate assembly according to a first embodiment of the present invention;
fig. 2 is a schematic size diagram of the cover plate assembly according to the first embodiment of the present invention after the extrusion of the first glue layer;
fig. 3 is a schematic structural diagram of a button cell provided in a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a button cell provided in a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an insulating adhesive layer of a button cell according to an embodiment of the present invention.
The reference numerals in the specification are as follows:
1. a pole column; 11. a first column; 12. a second cylinder; 2. a cover plate; 3. an insulating glue layer; 31. a first glue layer; 32. glue overflowing layer; 321. an intermediate adhesive layer; 322. a second adhesive layer; 33. a projection; 33a, accommodating grooves; 4. a housing; 5. and (7) a pole core.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further 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.
In order to explain the sound absorption sheet provided by the embodiment of the utility model more visually, each figure in the attached drawings of the specification adopts a perspective drawing method.
First embodiment
As shown in fig. 1, an embodiment of the present invention provides a cover plate assembly, which includes a cover plate 2, a terminal 1 and an insulating adhesive layer 3. Utmost point post 1 includes first cylinder 11 and second cylinder 12, and the bottom fixed connection of first cylinder 11 is in the top intermediate position of second cylinder 12, and first cylinder 11 and second cylinder 12 also can be integrated into one piece, and the two can also be welded connection, to fixed connection's mode, and the restriction is not done to this embodiment. The cross-sectional area of the second cylinder 12 is larger than that of the first cylinder 11, so that the outer edge of the second cylinder 12 protrudes out of the outer circumferential surface of the first cylinder 11, that is, the radial outer edge of the second cylinder 12 protrudes out of the outer circumferential surface of the first cylinder 11. The cover plate 2 is provided with a through hole, the cover plate 2 is sleeved on the first cylinder 11 through the through hole, a first gap is formed between the inner wall of the through hole and the outer peripheral wall of the first cylinder 11, and a second gap is formed between the bottom surface of the cover plate 2 and the top surface of the second cylinder 12.
The insulating adhesive layer 3 comprises a first adhesive layer 31 and an overflow adhesive layer 32, the overflow adhesive layer 32 comprises a middle adhesive layer 321 and a second adhesive layer 322 connected to the top of the middle adhesive layer 321, and the first adhesive layer 31 is connected to the bottom of the middle adhesive layer 321; the first adhesive layer 31 extends towards the first column 11 to make the first adhesive layer 31 fit the outer peripheral surface of the first column 11, the middle adhesive layer 321 is located above the first adhesive layer 31, so that the lower side of the middle adhesive layer 321 is connected with the upper surface of the first adhesive layer 31, the middle adhesive layer 321 and the second adhesive layer 322 surround the first column 11, the middle adhesive layer 321 fills the first gap to bond the cover plate 2 and the first column 11, and the first adhesive layer 31 fills the second gap to bond the cover plate 2 and the second column 12. For further description of the first adhesive layer 31, the middle adhesive layer 321 and the second adhesive layer 322, please refer to fig. 5, in which the dashed lines are used to indicate the separation positions.
The lower surface of the second adhesive layer 322 is flush with the upper surface of the cover plate 2, the second adhesive layer 322 is connected to the upper side of the middle adhesive layer 321, the second adhesive layer 322 has a protruding adhesive edge protruding from the top surface of the middle adhesive layer 321, and the protruding adhesive edge covers the upper surface of the cover plate 2.
The first gap and the second gap are filled with the insulating glue layer 3, on the premise of ensuring the insulating effect, the probability of dust and moisture entering the first gap and the second gap is reduced, and the phenomena of abnormal self-discharge, short circuit and the like caused by impurities in the first gap and the second gap are avoided as much as possible.
In order to facilitate the connection of the subsequent electrode post 1 with other elements, the top of the first column 11 is higher than the insulating glue layer 3 and the cover plate 2.
The first glue layer 31 and the flash glue layer 32 in the insulating glue layer 3 may be fixedly connected, such as welding, bonding, etc.
Of course, the insulating adhesive layer 3 may also be an integral structure, and the insulating adhesive layer 3 is coated on the hot melt adhesive on the lower surface of the cover plate 2 by extrusion, so that the hot melt adhesive overflows through the first gap and forms the overflow adhesive layer, and then, for example, the hot melt adhesive is obtained by overflowing to the upper surface of the cover plate 2 through the first gap.
The area of the second adhesive layer 322 covering the upper surface of the cover plate 2 is determined by the volume of the extruded insulating adhesive layer 3, and the second adhesive layer 322 does not completely cover the upper surface of the cover plate 2 because the second adhesive layer 322 is formed by extrusion.
From the above, because surplus hot melt adhesive directly overflows to apron 2 after the extrusion and forms second glue film 322, when scribbling the hot melt adhesive on apron 2 lower surface, need not to control excessively accurately and scribble the volume.
The first adhesive layer 31 extends along the radial direction of the pole 1; the diameter of the cover plate 2 is larger than that of the first glue layer 31, and the diameter of the first glue layer 31 is larger than that of the second cylinder 12.
The diameter of the first column 11 is R, the thickness of the inner side and the outer side of the middle glue layer 321 is D, there is an overlapping region in the orthographic projection of the first glue layer 31, the second column 12 and the cover plate 2 on the second column 12, that is, the region where the three of the first glue layer, the second column and the cover plate overlap together, the length of the inner side and the outer side direction of the overlapping region is L, the first glue layer 31 extends radially outward along the second column 12 and also extends towards one side away from the cover plate 2 to form the protruding portion 33, wherein the thickness of the protruding portion 33 is a, in this embodiment, after the first glue layer 31 is extruded, a part of the first glue layer 31 overflows upwards, and the other part of the first glue layer 31 overflows radially to form the protruding portion 33.
Compared with the protruding part 33, after the first adhesive layer 31 between the cover plate 2 and the second cylinder 12 is compressed, the thickness becomes thinner, the thickness of the compressed first adhesive layer 31 is C, the protruding part 33 and the first adhesive layer 31 jointly form an accommodating groove 33a, the first adhesive layer 31 is a bottom wall of the accommodating groove, the part of the protruding part 33 protruding out of the first adhesive layer 31 is a side wall of the accommodating groove, the accommodating groove has a downward opening and a radially inward opening, the two openings are communicated with each other, the part of the second cylinder radially protruding out of the first cylinder is called an edge convex part, and the accommodating groove is used for accommodating part or all of the edge convex part. When the cover plate 2 and the second cylinder 12 are pressed, the second cylinder 12 extrudes the first glue layer 31 from the first gap, at the moment, the first glue layer 31 becomes thinner to form a containing groove for containing part of the second cylinder 12, the thickness of the cover plate 2 is H, the height of the middle glue layer 321 is B, and H = B.
The volume of the middle adhesive layer 321 is V, and V = π x ((R + D) 2 -R 2 )×B；
The shrinkage volume of the insulating glue layer is equal to the volume of the accommodating groove, and the volume of the accommodating groove is M, so that M = pi x ((R + D + L) 2 -R 2 )×A×(1-C/A)；
V is less than or equal to M, and B is less than or equal to H.
Thus, the applicant researches and discovers that the insulating glue layer with the size design can better simplify the forming process of the overflow glue layer and can be better formed by extruding part of the first glue layer; on the other hand, the formed glue overflowing layer can better space the cover plate and the pole in the radial direction, and the risk of contact short circuit under extreme conditions is reduced or reduced; furthermore, through M such as being less than V, can be so that the pressfitting in-process of apron, utmost point post and first glue film, through the high and then control three's insulating joint strength and thickness of the relative first glue film of control utmost point post. Preferably, V is less than or equal to 0.5 xM, so that the overflow glue layer and the protruding part can better separate the pole and the cover plate, and the risk of contact short circuit under extreme conditions is further reduced or reduced. More preferably, V is less than or equal to 0.3 × M, and thus, through research by the applicant, it is found that when the above dimensions are adopted, by controlling the thickness of the protruding portion, the thickness of the cover plate, the thickness and height of the middle adhesive layer, and the like, the insulating effect of the insulating adhesive layer on the cover plate and the pole column is better, the connection strength is better, and relatively, on the premise of ensuring the insulating property and the connection strength, the first adhesive layer of the insulating adhesive layer can be made thinner to be as low as 0.08mm to 0.09mm, so as to reduce the overall thickness of the cover plate assembly, and be beneficial to improving the space energy density of the button cell. Preferably, the insulating glue layer is hot melt glue. The first glue film and the excessive glue layer of the insulation glue layer can be obtained by adopting a direct hot melting coating mode and then solidifying, and the first glue film can also be extruded by the second column body of the pole post after the cover plate is coated with the partial first glue film, so that the first glue film overflows to form the excessive glue layer and the protruding part, and the excessive glue layer and the protruding part are obtained. For example, the material of the insulating adhesive layer includes but is not limited to a hot melt adhesive such as PP adhesive, and may also be an epoxy adhesive. Specifically, the insulating glue in this embodiment is made of PP glue.
Among them, preferably, C/a is 0.8 to 0.9, that is, the thickness ratio of the first adhesive layer to the protruding part is 0.8 to 0.9, for example, the shrinkage rate of the hot melt adhesive is 80% to 90%, that is, the thickness of the first adhesive layer after being compressed is 80% to 90% of the thickness before being compressed, so that the applicant has found that the adhesive strength is better and the insulating property is better in the case of the above shrinkage rate. For example, D is 0.2mm or more and B is 0.2mm or more. Thus, the insulating property is relatively good.
Further preferably, D is 0.2mm to 0.3mm and B is 0.2mm to 0.25mm.
The thickness of the middle adhesive layer 321 at this time makes the first gap width suitable for extrusion flash, and the height of the middle adhesive layer 321 makes the cap plate not too thick, thereby improving the energy of the battery.
Second embodiment
The utility model discloses a apron subassembly of second embodiment, its difference with first embodiment lies in, bulge 33 and first glue film 31 are integrated into one piece, in other words, the two can be when manufacturing the shaping after install again on the apron subassembly, and not utilize hot melt adhesive extrusion to form, and wherein, the thickness of bulge is A, and the thickness of first glue film is C, and A is greater than C.
Third embodiment
Referring to fig. 4, for the utility model discloses a button cell of third embodiment, including utmost point core 5, casing 4 and the apron subassembly of any kind of above-mentioned, casing 4 fixed connection is in apron 2, and casing 4 and apron 2 enclose out and hold the chamber, and utmost point core 5 sets up in holding the intracavity, and second cylinder 12 is located and holds the intracavity and the up end of first cylinder 11 is located and holds the chamber outside.
The first column 11 in this embodiment is located outside the accommodating cavity, the second column 12 is located inside the accommodating cavity, and the pole 1 at this time is in an inverted T shape.
Fourth embodiment
Referring to fig. 5, for the button cell battery of the fourth embodiment of the present invention, including pole piece 5, casing 4 and any one of the above-mentioned cover plate assemblies, casing 4 is fixedly connected to cover plate 2, casing 4 and cover plate 2 enclose out and hold the chamber, pole piece 5 sets up in holding the intracavity, second cylinder 12 is located and holds the intracavity and the up end of first cylinder 11 is located and holds the extraluminal.
The first column body 11 in this embodiment is located and holds the intracavity, and the second column body 12 is located and holds the chamber outside, and utmost point post 1 at this moment is positive T type.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (11)
1. A cover plate assembly is characterized by comprising a cover plate, a pole and an insulating glue layer;
the pole comprises a first column body and a second column body, one end of the first column body is connected to the end face of the second column body, and the sectional area of the second column body is larger than that of the first column body, so that the outer edge of the second column body protrudes out of the peripheral face of the first column body;
the cover plate is provided with a through hole, the cover plate is sleeved on the first cylinder through the through hole, a first gap is formed between the inner wall of the through hole and the outer peripheral wall of the first cylinder, a second gap is formed between the cover plate and the surface of the opposite side of the second cylinder, and the second gap transversely extends inwards to the outer peripheral surface of the first cylinder so as to be communicated with the first gap;
the insulation adhesive layer comprises a first adhesive layer and an adhesive overflow layer, the adhesive overflow layer comprises an intermediate adhesive layer, the first adhesive layer transversely extends inwards to the peripheral surface of the first column, the first adhesive layer is connected with the intermediate adhesive layer, the intermediate adhesive layer surrounds the first column, at least part of the intermediate adhesive layer fills the first gap to bond the cover plate and the first column, and at least part of the first adhesive layer fills the second gap to bond the cover plate and the second column.
2. The cover plate assembly of claim 1, wherein the intermediate adhesive layer fills the first gap, the flash adhesive layer further comprises a second adhesive layer connected to a side of the intermediate adhesive layer away from the second post, the second adhesive layer has a protruding adhesive edge protruding laterally from the intermediate adhesive layer, the protruding adhesive edge and the first adhesive layer are respectively disposed on opposite sides of the cover plate, and an end of the first post away from the second post protrudes relative to the second adhesive layer.
3. The cover plate assembly as claimed in claim 1, wherein the insulating adhesive layer is a unitary structure, and the insulating adhesive layer is coated on a hot melt adhesive on a surface of the cover plate adjacent to the side of the second cylinder by extrusion, so that the hot melt adhesive overflows and forms through the first gap.
4. The cover plate assembly according to claim 1, wherein the first glue layer extends in a radial direction of the pole; the diameter of apron is greater than the diameter of first glue film, the diameter of first glue film is greater than the diameter of second cylinder.
5. The cover plate assembly as claimed in claim 1, wherein the first and second pillars are both cylindrical, the cover plate is disc-shaped, the first adhesive layer fills the second gap, an outer peripheral surface of the first adhesive layer extends radially outward and also extends away from the cover plate to form a protrusion, the protrusion protrudes from the second pillar, an inner sidewall of the protrusion fits the outer peripheral surface of the second pillar, the protrusion and the first adhesive layer form a receiving groove, and a portion of the second pillar is disposed in the receiving groove.
6. The cover plate assembly according to claim 5, wherein the diameter of the first cylinder is R, the thicknesses of the inner side and the outer side of the middle rubber layer are D, the projections of the first rubber layer, the second cylinder and the cover plate along the axial direction of the second cylinder respectively have an overlapping region, the length of the inner side and the outer side of the overlapping region is L, the thickness of the protruding portion is A, the thickness of the first rubber layer is C, the thickness of the cover plate is H, and the height of the middle rubber layer is B;
the volume of the middle glue layer is V, then V = pi x ((R + D) 2 -R 2 )×B；
The volume of the accommodating groove is M, then M = pi x ((R + D + L) 2 -R 2 )×A×(1-C/A)；
V≤M，B≤H。
7. The cover plate assembly of claim 6, wherein the value of C/A is 0.8 to 0.9; v is less than or equal to 0.5 xM.
8. The lid assembly of claim 6, wherein D is 0.2mm or greater and B is 0.2mm or greater.
9. The decking assembly defined in claim 6 wherein D is from 0.2 to 0.3mm and B is from 0.2 to 0.25mm.
10. The lid assembly of claim 6, wherein V ≦ 0.3 xM and the thickness C of the first glue layer is greater than 0.08 mm.
11. A button cell, comprising the cover plate assembly of any one of claims 1-10, a pole piece, and a housing, wherein the housing is fixedly connected to the cover plate, the housing and the cover plate enclose a receiving cavity, and the pole piece is disposed in the receiving cavity;
the second cylinder is located and holds the intracavity just the up end of first cylinder is located and holds the chamber outside, or, first cylinder is located and holds the intracavity just the second cylinder is located and holds the chamber outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396932.5U CN218827492U (en) | 2022-09-08 | 2022-09-08 | Cover plate assembly and button cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222396932.5U CN218827492U (en) | 2022-09-08 | 2022-09-08 | Cover plate assembly and button cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218827492U true CN218827492U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222396932.5U Active CN218827492U (en) | 2022-09-08 | 2022-09-08 | Cover plate assembly and button cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218827492U (en) |
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2022
- 2022-09-08 CN CN202222396932.5U patent/CN218827492U/en active Active
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