CN109192889B - Micro battery - Google Patents
Micro battery Download PDFInfo
- Publication number
- CN109192889B CN109192889B CN201810959587.7A CN201810959587A CN109192889B CN 109192889 B CN109192889 B CN 109192889B CN 201810959587 A CN201810959587 A CN 201810959587A CN 109192889 B CN109192889 B CN 109192889B
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- Prior art keywords
- end cover
- battery
- sheet
- insulating bonding
- cover body
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- 238000002955 isolation Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 description 8
- 239000004033 plastic Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a miniature battery, which comprises a battery shell with an opening at one end, and an electrode isolation assembly, wherein the electrode isolation assembly comprises at least one positive electrode and at least one negative electrode, the miniature battery also comprises a battery end cover for sealing the opening of the battery shell, the battery end cover comprises an end cover body, a conductive sheet and an insulating bonding sheet arranged between the end cover body and the conductive sheet, the end cover body and the conductive sheet are mutually and insulated and bonded through the insulating bonding sheet, the end cover body and the insulating bonding sheet are provided with a leading-out hole, the end cover body and the battery shell are assembled and matched to form a containing space, the electrode isolation assembly is arranged in the containing space, the end cover body is electrically connected with one of the at least one positive electrode and the at least one negative electrode, and the conductive sheet is electrically connected with the other of the at least one positive electrode and the at least one negative electrode.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a miniature battery.
Background
The micro battery is one of the important development directions in the current battery field, and how to reduce the structural size of the battery and improve the space utilization rate of the battery is a technical problem to be solved. In general, existing miniature button cells typically include a lower case having a positive polarity and a top cover having a negative polarity; when the button cell is used, the negative output interface of the button cell is led out from the top cover, and the positive output interface is led out from the lower shell and wound above the top cover along the shell, so that the space utilization rate is reduced.
In chinese patent application No. 201710901425.3, a button cell is provided, in which the casing of the button cell includes a conductive end wall, the end wall includes at least one lead-out hole, an electrical conductor is disposed in the at least one lead-out hole, and an insulating seal for insulating the end wall is disposed between the wall of the at least one lead-out hole and the electrical conductor. The positive electrode and the negative electrode of the button cell are respectively and electrically connected with the end wall and the electric conductor positioned on the end wall, so that the positive electrode and the negative electrode are positioned on the same side of the button cell. However, the thickness of the conductor and insulating seal structure of the button cell is large, and the button cell is not easy to process and manufacture.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an improved micro battery, which aims at the above-mentioned drawbacks of the prior art.
The technical scheme adopted for solving the technical problems is as follows: the miniature battery comprises a battery shell with an opening at one end, and an electrode isolation assembly, wherein the electrode isolation assembly comprises at least one positive electrode and at least one negative electrode, the miniature battery further comprises a battery end cover for sealing the opening of the battery shell, the battery end cover comprises an end cover body, a conductive sheet and an insulating bonding sheet arranged between the end cover body and the conductive sheet, the end cover body and the conductive sheet are mutually and insulatively bonded through the insulating bonding sheet, a lead-out hole is formed in the end cover body and the insulating bonding sheet, the end cover body and the battery shell are assembled and matched to form a containing space, the electrode isolation assembly is arranged in the containing space, the end cover body is electrically connected with one of the at least one positive electrode and the at least one negative electrode, and the conductive sheet is electrically connected with the other of the at least one positive electrode and the at least one negative electrode.
In some embodiments, the insulating bonding sheet and the conductive sheet are disposed within the receiving space.
In some embodiments, the insulating bonding sheet has a larger physical dimension than the conductive sheet.
In some embodiments, the insulating bonding sheet and the conductive sheet are disposed outside the receiving space.
In some embodiments, the battery case is in a cylinder shape with an opening at the top, the end cover body is in a flat plate shape and covers the opening of the battery case, and the periphery of the end cover body can be combined with the edge of the opening of the battery case in a sealing way through laser welding.
In some embodiments, the battery case is in a cylindrical shape with an opening at the top, the end cover body comprises a circular top wall and a cylindrical side wall surrounding the periphery of the circular top wall, and the end cover body is reversely buckled in the battery case and is combined by sealing glue.
In some embodiments, the end cap body, the insulating bonding sheet, and the conductive sheet each have a thickness of between 0.02mm and 1 mm.
In some embodiments, the electrode isolation assembly takes the form of a spiral winding, and the central axis of the electrode isolation assembly coincides with the central axis of the accommodating space.
In some embodiments, the end cap body and the surface of the conductive sheet to which the insulating bonding sheet is bonded are formed with a plurality of recesses.
In some embodiments, the end cap body, the insulating bonding sheet, and the conductive sheet are connected by a laser welding bond.
The micro battery for implementing the invention has at least the following beneficial effects: according to the miniature battery disclosed by the invention, the battery end cover is sequentially overlapped and combined by the end cover body, the insulating combined sheet and the conducting sheet, the thickness of the battery end cover is small, the end cover body and the conducting sheet are respectively and electrically connected with the positive electrode and the negative electrode of the battery, and when the miniature battery is used, the positive output interface and the negative output interface of the battery are led out from the same side of the battery, so that the space utilization rate is further improved; in addition, as the binding force between the insulating binding sheet and the end cover body and the conducting sheet has a certain strength value, when the internal pressure of the battery reaches a certain value, the insulating binding sheet and the end cover body or the conducting sheet can be separated, so that pressure relief is started, and the safety of the battery is improved; further, through adopting laser welding's mode to combine between end cover body, insulating bonding piece and the conducting strip, the thickness of end cover body, insulating bonding piece and conducting strip can all be accomplished very little to the thickness size of battery end cover has been reduced greatly.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic perspective view of a microbattery in accordance with some embodiments of the present invention;
fig. 2 is a schematic view of a longitudinal cross-sectional structure of a microbattery in some embodiments of the present invention;
FIG. 3 is an enlarged schematic view at A of FIG. 2;
fig. 4 is a schematic view showing a longitudinal cross-sectional structure of a micro battery according to still other embodiments of the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
Fig. 1-3 illustrate a microbattery in accordance with some embodiments of the present invention that includes a cell housing 1 having an opening at one end, an electrode separator assembly 2, and a cell end cap 3 for sealing over the opening of the cell housing 1. The electrode separator assembly 2 includes at least one positive electrode 22 and at least one negative electrode 21, and an insulating separator 23 between the positive electrode 22 and the negative electrode 21. The electrode separator assembly 2 may take the form of a spiral winding or may take the form of a laminate. The battery end cover 3 comprises an end cover body 31, a conductive sheet 33 and an insulating bonding sheet 32 arranged between the end cover body 31 and the conductive sheet 33, wherein the end cover body 31 and the conductive sheet 33 are mutually and insulatively bonded through the insulating bonding sheet 32, the end cover body 31 and the battery shell 1 are assembled and matched to form a containing space 4, the electrode isolation assembly 2 is arranged in the containing space 4, the end cover body 31 and the insulating bonding sheet 32 are provided with an extraction hole 34 for extracting an electrode, the end cover body 31 is electrically connected with one of the at least one positive electrode and the at least one negative electrode, and the conductive sheet 33 is electrically connected with the other of the at least one positive electrode and the at least one negative electrode.
Specifically, taking a button cell as an example, the cell casing 1 of the button cell is generally cylindrical with an opening at the top, the end cover body 31 is generally flat and covers and is mounted at the opening of the cell casing 1, and the periphery of the end cover body 31 can be hermetically combined with the opening edge of the cell casing 1 by means of laser welding.
The end cover body 31, the insulating bonding sheet 32 and the conductive sheet 33 are sequentially stacked from bottom to top, and the end cover body 31 and the battery shell 1 are assembled and matched to form a containing space 4, and the insulating bonding sheet 32 and the conductive sheet 33 are located outside the containing space 4. The end cover body 31 and the insulating bonding sheet 32 are provided with a lead-out hole 34, the negative electrode 21 of the electrode isolation assembly 2 is connected with the conductive sheet 33 through the lead-out hole 34, and the positive electrode 22 of the electrode isolation assembly 2 is connected with the end cover body 31. It will be appreciated that in other embodiments, the positive electrode 22 of the electrode isolation assembly 2 may be connected to the conductive sheet 33 through the lead-out hole 34, and the negative electrode 21 of the electrode isolation assembly 2 may be connected to the end cap body 31; the insulating bonding sheet 32 and the conductive sheet 33 may be disposed inside the accommodating space 4.
The end cover body 31, the insulating bonding sheet 32 and the conductive sheet 33 can be bonded together by laser welding. Preferably, the insulating bonding sheet 32 is made of a plastic material, and the surface of the end cap body 31 and the surface of the conductive sheet 33 to which the insulating bonding sheet 32 is bonded is formed with a plurality of recesses 35 by surface treatment in advance, and after laser welding, a part of the insulating bonding sheet 32 is heat-fused into the recesses 35, thereby making bonding tighter. In other embodiments, the end cover body 31, the insulating bonding sheet 32 and the conductive sheet 33 may be bonded together by ultrasonic welding, nano injection molding, or glue bonding. In other embodiments, the insulating bonding sheets 32 may be made of rubber, TPE or other insulating materials.
The battery end cover 3 may be manufactured by the following steps:
providing an end cap body 31, an insulating bonding sheet 32, and a conductive sheet 33;
a lead hole 34 is formed in the end cap body 31 and the insulating bonding sheet 32;
a plurality of concave portions 35 are formed by surface treatment on the surfaces of the cap body 31 and the conductive sheet 33 to be bonded with the insulating bonding sheet 32, respectively;
bonding the insulating bonding sheet 32 to the end cap body 31 by laser welding;
the conductive sheet 33 is bonded to the insulating bonding sheet 32 by laser welding.
Since the bonding force between the plastic and the metal has a certain strength value, when the internal pressure exceeds the strength value, the plastic and the metal are separated, and therefore, the battery end cover 3 can also be used as a safety relief valve. As shown in fig. 2, in the button cell, at the position of the lead-out hole 34, a pressure difference formed by the pressure inside the button cell is formed between the conductive sheet 33 and the insulating bonding sheet 32, and when the pressure inside the button cell reaches a certain value, the conductive sheet 33 and the insulating bonding sheet 32 are separated, so that pressure release is started, the safety hazard degree of the cell is reduced to the greatest extent, and the safety of the cell is improved.
The electrode isolating assembly 2 takes the form of a spiral winding, and the central axis of which coincides with the central axis of the accommodating space 4. The end cover body 31, the insulating bonding sheet 32 and the conductive sheet 33 are all disc-shaped, and the diameter of the end cover body 31 is larger than that of the insulating bonding sheet 32, and the diameter of the insulating bonding sheet 32 is larger than that of the conductive sheet 33. The extraction hole 34 is formed in the middle of the end cover body 31 and the insulating bonding sheet 32, and the central axes of the end cover body 31, the insulating bonding sheet 32, the conductive sheet 33 and the extraction hole 34 are coincident with the central axis of the battery case 1. The thickness dimensions of the end cap body 31, the insulating bonding sheet 32 and the conductive sheet 33 are each between 0.02mm and 1mm, and preferably the thickness thereof is approximately 0.15 mm. It should be understood that in other embodiments, the insulating bonding sheet 32 and the conductive sheet 33 may have other shapes such as a square sheet, the extraction holes 34 may be formed at other positions on the end cover body 31 and the insulating bonding sheet 32, the number of the extraction holes 34 is not limited to one, and two or more may be applied.
Fig. 4 shows a micro battery according to another embodiment of the present invention, which includes a battery case 1a having an opening at one end, an electrode separator assembly 2a, and a battery cap 3a for sealing and covering the opening of the battery case 1 a. The electrode separator assembly 2a includes at least one positive electrode 22a and at least one negative electrode 21a, and an insulating separator 23a between the positive electrode 22a and the negative electrode 21 a. The electrode separator assembly 2a may take the form of a spiral winding or may take the form of a laminate. The battery end cover 3a comprises an end cover body 31a, a conductive sheet 33a and an insulating bonding sheet 32a arranged between the end cover body 31a and the conductive sheet 33a, wherein the end cover body 31a and the conductive sheet 33a are mutually and insulated and bonded through the insulating bonding sheet 32a, the end cover body 31a and the battery shell 1a are assembled and matched to form a containing space 4a, the electrode isolation assembly 2a is arranged in the containing space 4a, the end cover body 31a and the insulating bonding sheet 32a are provided with lead-out holes 34a for leading out electrodes, the end cover body 31a is electrically connected with one of the at least one positive electrode and the at least one negative electrode, and the conductive sheet 33a is electrically connected with the other of the at least one positive electrode and the at least one negative electrode.
Specifically, taking a button cell as an example, a cell case 1a in the button cell includes a circular bottom wall and a cylindrical side wall surrounding the periphery of the bottom wall, an end cap body 31a includes a circular top wall and a cylindrical side wall surrounding the periphery of the top wall, and the end cap body 31a is flip-open inside the cell case 1 and is insulated and sealed by a sealant 5 a.
The end cap body 31a, the insulating bonding sheet 32a and the conductive sheet 33a which constitute the battery end cap 3a are stacked in order from top to bottom, and the end cap body 31a and the battery case 1a are mounted and matched to form a containing space 4a, and the insulating bonding sheet 32a and the conductive sheet 33a are located inside the containing space 4 a. The positive electrode 22a of the electrode separator 2a is connected to the cap body 31a, and the negative electrode 21a is connected to the conductive sheet 33 a. The end cap body 31a and the insulating bonding sheet 32a are provided with extraction holes 34a so as to extract the electrodes from the conductive sheet 33a for use. It will be appreciated that in other embodiments, the positive electrode 22a of the electrode separator assembly 2a may be connected to the conductive sheet 33a, and the negative electrode 21a may be connected to the end cap body 31 a; the insulating bonding sheet 32a and the conductive sheet 33a may be disposed outside the accommodation space 4 a.
The end cap body 31a, the insulating bonding sheet 32a and the conductive sheet 33a may be bonded together by laser welding. Preferably, the insulating bonding sheet 32a is made of a plastic material, and the surfaces of the end cap body 31a and the conductive sheet 33a bonded to the insulating bonding sheet 32a are formed with a plurality of recesses by surface treatment in advance, and after laser welding, a part of the insulating bonding sheet 32a is heat-fused into the recesses, thereby making bonding tighter. In other embodiments, the end cover body 31a, the insulating bonding sheet 32a and the conductive sheet 33a may be bonded together by ultrasonic welding, nano injection molding, or glue bonding. In other embodiments, the insulating bonding sheets 32 may be made of rubber, TPE or other insulating materials.
The battery end cap 3a may be manufactured by the following steps:
providing an end cap body 31a, an insulating bonding sheet 32a, and a conductive sheet 33a;
a lead hole 34a is formed in the cap body 31a and the insulating bonding sheet 32 a;
surface treatment is performed on the surfaces of the end cap body 31a and the conductive sheet 33a to be bonded with the insulating bonding sheet 32a, respectively, to form a plurality of concave portions;
bonding the insulating bonding sheet 32a to the end cap body 31a by laser welding;
the conductive sheet 33a is bonded to the insulating bonding sheet 32a by laser welding.
The electrode isolation assembly 2a takes the form of a spiral winding, and the central axis of which coincides with the central axis of the accommodating space 4 a. The insulating bonding sheet 32a and the conductive sheet 33a are both disc-shaped, and the diameter of the end cap body 31a is larger than the diameter of the insulating bonding sheet 32a, and the diameter of the insulating bonding sheet 32a is larger than the diameter of the conductive sheet 33 a. The lead-out hole 34a is formed in the middle of the end cap body 31a and the insulating bonding sheet 32a, and the central axes of the end cap body 31a, the insulating bonding sheet 32a, the conductive sheet 33a, and the lead-out hole 34a coincide with the central axis of the battery case 1 a. The thickness dimensions of the end cap body 31a, the insulating bonding sheet 32a and the conductive sheet 33a are each between 0.02mm and 1mm, and preferably the thickness thereof is approximately about 0.15 mm. It should be understood that in other embodiments, the insulating bonding sheet 32a and the conductive sheet 33a may have other shapes such as a square sheet, the extraction holes 34a may be formed at other positions of the end cover body 31a and the insulating bonding sheet 32a, and the number of the extraction holes 34a is not limited to one, two or more.
Since the bonding force between the plastic and the metal has a certain strength value, the plastic and the metal are separated when the internal pressure exceeds the strength value, and thus the battery end cover 3a can also be used as a safety relief valve. As shown in fig. 4, the diameters of the end cover body 31a, the insulating bonding sheet 32a and the conductive sheet 33a are gradually reduced, and the two ends of the battery end cover 3a have a certain step structure, so that a certain pressure difference is formed among the end cover body 31a, the insulating bonding sheet 32a and the conductive sheet 33a under the action of the internal pressure of the button battery, and when the internal pressure of the button battery reaches a certain value, the insulating bonding sheet 32a and the end cover body 31a or the conductive sheet 33a are separated, so that the opening and the pressure relief are realized, the safety hazard degree of the battery is reduced to the greatest extent, and the safety of the battery is improved.
It can be appreciated that the battery end cover of the invention can be applied to button batteries, square batteries, columnar batteries, special-shaped batteries and other batteries. According to the miniature battery disclosed by the invention, the battery end cover is formed by sequentially superposing and laser welding the end cover body, the insulating bonding piece and the conducting piece, and the thicknesses of the end cover body, the insulating bonding piece and the conducting piece can be about 0.15mm respectively, so that the thickness dimension of the battery end cover is greatly reduced, the miniature battery is especially suitable for the miniature battery field, and the bonding force between the insulating bonding piece and the end cover body and between the insulating bonding piece and the conducting piece has a certain strength value, and when the internal pressure of the battery reaches a certain value, the insulating bonding piece and the end cover body or the conducting piece can be separated, so that pressure relief is started, and the safety of the battery is improved; in addition, the positive electrode and the negative electrode of the miniature battery are respectively and electrically connected with the end cover body and the conducting plate which form the end cover of the battery, so that when the miniature battery is used, the positive output interface and the negative output interface of the battery are led out from the same side of the battery, and the space utilization rate is further improved.
It will be appreciated that the above technical features may be used in any combination without limitation.
The foregoing examples only illustrate preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (9)
1. The miniature battery comprises a battery shell with an opening at one end, and an electrode isolation assembly, wherein the electrode isolation assembly comprises at least one positive electrode and at least one negative electrode, and is characterized by further comprising a battery end cover for sealing the opening of the battery shell, wherein the battery end cover comprises an end cover body, a conducting sheet and an insulating bonding sheet arranged between the end cover body and the conducting sheet, the end cover body and the conducting sheet are mutually and insulatively bonded through the insulating bonding sheet, the end cover body and the insulating bonding sheet are provided with lead-out holes, the end cover body and the battery shell are assembled and matched to form a containing space, the electrode isolation assembly is arranged in the containing space, the end cover body is electrically connected with one of the at least one positive electrode and the at least one negative electrode, and the conducting sheet is electrically connected with the other of the at least one positive electrode and the at least one negative electrode;
the end cover body and the surface of the conductive sheet, which is combined with the insulating bonding sheet, are formed with a plurality of concave parts, and a part of the insulating bonding sheet is thermally fused into the concave parts, so that the bonding is tighter.
2. The microbattery of claim 1, wherein said insulating bonding sheet and said conductive sheet are disposed within said receiving space.
3. The microbattery of claim 2 wherein the insulating bonding pad has a larger physical dimension than the conductive pad.
4. The microbattery of claim 1, wherein said insulating bonding sheet and said conductive sheet are disposed outside said receiving space.
5. The miniature battery of claim 1, wherein said battery housing is generally cylindrical with an opening at the top, said end cap body is flat covering said opening of said battery housing, and the periphery of said end cap body is sealingly joined to the edge of said opening of said battery housing by laser welding.
6. The miniature battery of claim 1, wherein said battery housing is generally cylindrical with an opening at the top, said end cap body comprising a circular top wall and a cylindrical side wall surrounding the periphery of the circular top wall, said end cap body being flip-flop within said battery housing and sealingly bonded by a sealant.
7. The microbattery of claim 1, wherein said end cap body, said insulating bonding sheet, and said conductive sheet each have a thickness between 0.02mm and 1 mm.
8. The microbattery of claim 1 wherein said electrode isolation assembly is in the form of a spiral winding, the central axis of said electrode isolation assembly coinciding with the central axis of said receiving space.
9. The microbattery of claim 1 wherein said end cap body, said insulating bonding pad, and said conductive pad are joined by a laser welded bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810959587.7A CN109192889B (en) | 2018-08-22 | 2018-08-22 | Micro battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810959587.7A CN109192889B (en) | 2018-08-22 | 2018-08-22 | Micro battery |
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| Publication Number | Publication Date |
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| CN109192889A CN109192889A (en) | 2019-01-11 |
| CN109192889B true CN109192889B (en) | 2024-01-26 |
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| CN201810959587.7A Active CN109192889B (en) | 2018-08-22 | 2018-08-22 | Micro battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20210021842A (en) * | 2019-08-19 | 2021-03-02 | 삼성에스디아이 주식회사 | Rechargeable battery |
| KR102561627B1 (en) | 2020-02-07 | 2023-07-31 | 닝더 엠프렉스 테크놀로지 리미티드 | Battery and electric apparatus provided with battery |
| CN113013524B (en) * | 2021-02-23 | 2023-06-20 | 珠海冠宇电池股份有限公司 | Battery case and battery |
| WO2021185074A1 (en) * | 2020-03-18 | 2021-09-23 | 珠海冠宇电池股份有限公司 | Battery casing, battery and electronic device |
| KR20230021666A (en) * | 2020-06-03 | 2023-02-14 | 주하이 코스엠엑스 배터리 컴퍼니 리미티드 | Button type battery and its manufacturing method, electronic device |
| US11862806B2 (en) | 2020-06-03 | 2024-01-02 | Zhuhai Cosmx Battery Co., Ltd. | Button cell and electronic device |
| WO2022011558A1 (en) * | 2020-07-14 | 2022-01-20 | 宁德新能源科技有限公司 | Battery and electrical device provided with said battery |
| WO2022044628A1 (en) * | 2020-08-26 | 2022-03-03 | 株式会社村田製作所 | Secondary battery |
| CN112467266B (en) * | 2020-11-30 | 2023-12-19 | 惠州市恒泰科技股份有限公司 | Preparation method of steel shell button cell and steel shell button cell |
| CN112467268A (en) * | 2020-11-30 | 2021-03-09 | 惠州市恒泰科技股份有限公司 | Button battery and preparation method thereof |
| CN213520130U (en) * | 2020-12-04 | 2021-06-22 | 珠海冠宇电池股份有限公司 | Button cell and electronic equipment |
| CN113131048A (en) * | 2021-04-30 | 2021-07-16 | 国研新能(深圳)技术有限公司 | Battery case and battery |
| WO2023004713A1 (en) * | 2021-07-29 | 2023-02-02 | 珠海微矩实业有限公司 | Miniature battery |
| CN113611961A (en) * | 2021-08-06 | 2021-11-05 | 国研新能(深圳)技术有限公司 | Battery case and battery |
| CN113675512A (en) * | 2021-09-18 | 2021-11-19 | 珠海冠宇电池股份有限公司 | Battery and electronic equipment |
| CN219106338U (en) * | 2022-11-29 | 2023-05-30 | 东莞锂威能源科技有限公司 | Composite cover plate structure of steel shell button cell and button cell |
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