CN113206326A - Folding button type lithium battery - Google Patents
Folding button type lithium battery Download PDFInfo
- Publication number
- CN113206326A CN113206326A CN202110657501.7A CN202110657501A CN113206326A CN 113206326 A CN113206326 A CN 113206326A CN 202110657501 A CN202110657501 A CN 202110657501A CN 113206326 A CN113206326 A CN 113206326A
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- CN
- China
- Prior art keywords
- positive
- negative
- diaphragm
- pole
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a folding button lithium battery, which comprises a positive cover and a negative cover, wherein the negative cover is covered on the inner side of the positive cover, a pole group is arranged in the positive cover, the pole group comprises a positive plate, a diaphragm and a negative plate, the positive plate comprises a plurality of spliced positive electrode units, the diaphragm comprises a plurality of spliced diaphragm units, the negative plate comprises a plurality of spliced negative electrode units, a diaphragm unit is arranged between the adjacent positive electrode units and the adjacent negative electrode units, a positive connection foil is arranged at the end part of the positive plate, a negative connection foil is arranged at the end part of the negative plate, and a termination adhesive tape is pasted on the outer side of the pole group. The invention has simple structure, simple processing technology, high production efficiency and low production cost, and can effectively increase the quick charge performance and the rate discharge performance of the battery due to single-side coating and only one layer of diaphragm, and the single-side coating can ensure that the consistency of the battery is better.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a folding button type lithium battery.
Background
Along with the volume of electronic product diminishes gradually, the electronic product that needs configuration battery power supply also more and more high to the volume of battery and the power supply volume requirement, but after current button lithium cell volume dwindled, the power supply volume of battery also can receive very big influence, some button lithium cell of rolling up core structure often supply power inadequately, can not satisfy electronic product's operation requirement for a long time, other button lithium cell structure of lamination are complicated, and processing technology is complicated, and production efficiency is low, and manufacturing cost is high. Therefore, there is a need for improvements in the prior art to avoid the disadvantages of the prior art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a folding button lithium battery with simple structure and high production efficiency.
The invention is realized by the following technical scheme:
the utility model provides a foldable knot formula lithium cell, locates including positive polar cap and lid the inboard negative pole lid of positive polar cap, be equipped with utmost point group in the positive polar cap, utmost point group includes positive plate, diaphragm and negative pole piece, positive plate includes a plurality of anodal units that continue to connect, the diaphragm includes a plurality of diaphragm units that continue to connect, the negative pole piece includes a plurality of negative pole units that continue to connect, and is adjacent positive pole unit with be equipped with a diaphragm unit between the negative pole unit, the tip of positive plate is equipped with anodal connection foil, the tip of negative pole piece is equipped with negative pole connection foil, the outside of utmost point group is pasted and is had the termination sticky tape.
Furthermore, the bottom of the positive plate is connected with a positive pole lug, and the positive pole lug is connected with the bottom of the positive pole cover.
Further, the bottom of the negative plate is connected with a negative pole tab, and the negative pole tab is connected with the top of the negative pole cover.
Further, the positive plate comprises an aluminum foil layer and a single-sided positive electrode dressing layer arranged on one surface of the aluminum foil layer, and the single-sided positive electrode dressing layer is overlapped with the diaphragm.
Further, the negative plate comprises a copper foil layer and a single-sided negative electrode coating layer arranged on one surface of the copper foil layer, and the single-sided negative electrode coating layer is overlapped with the diaphragm.
Further, the shape of the positive electrode unit is circular, and the size of the positive electrode unit is consistent with that of the negative electrode unit.
Furthermore, the shapes of the positive electrode unit and the negative electrode unit are both elliptical or regular polygonal, and the area of the negative electrode unit is 5-20% larger than that of the positive electrode unit.
Further, the lengths of the anode connecting foil and the cathode connecting foil are both 3 mm-6 mm, and the widths thereof are both 2 mm-5 mm.
Further, the outer side of the pole group is sleeved with a pole group insulating sleeve, and the termination adhesive tape is an expansion adhesive tape.
Furthermore, an insulating rubber ring is arranged between the positive electrode cover and the negative electrode cover, corresponding steps are arranged on the top of the negative electrode cover and the top of the insulating rubber ring, and the top of the positive electrode cover is bent inwards to compress the insulating rubber ring to form a sealing structure of the battery.
Compared with the prior art, the invention has the advantages that the positive plate comprises a plurality of spliced positive units, the diaphragm comprises a plurality of spliced diaphragm units, the negative plate comprises a plurality of spliced negative units, the negative units are stacked between the positive units, the diaphragm unit is arranged between the adjacent positive units and the negative units, the end part of the positive plate is provided with the positive connecting foil, the end part of the negative plate is provided with the negative connecting foil, the outer side of the pole group is pasted with the termination adhesive tape, the positive plate, the diaphragm and the negative plate can finish the manufacture of the pole group in a mode of bending and stacking the edges, the structure is simple, the processing technology is simple, the production efficiency is high, the production cost is low, the pole group insulating sleeve sleeved outside the pole group can prevent the positive plate in the pole group from contacting the inner wall of the negative cover to cause short circuit, the safety of the battery is improved, meanwhile, the positive units and the negative units are stacked together at intervals, and the generation of electric energy is facilitated, the electric energy reserves of the button lithium battery can be effectively increased, the occupied volume of the pole pieces is greatly reduced, the space utilization rate is high, the energy density of the battery is improved, the consistency of the battery can be improved by the single-side coating layer, and the quick charge and rate discharge performance of the battery can be effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a folding button lithium battery of the present invention;
FIG. 2 is a schematic view of a circular or elliptical pole group of the diaphragm unit of the present invention;
FIG. 3 is a schematic view of a rectangular pole group of the diaphragm unit of the present invention;
FIG. 4 is an exploded view of the expanded positive plate, separator and negative plate of the present invention;
FIG. 5 is a schematic structural diagram of a positive plate with a circular positive electrode unit according to the present invention;
fig. 6 is a sectional view of a positive electrode sheet of the present invention;
FIG. 7 is a schematic structural view of a separator having rectangular separator elements according to the present invention;
FIG. 8 is a schematic view of the construction of the elliptical diaphragm of the diaphragm unit of the present invention;
fig. 9 is a schematic structural view of a negative electrode sheet in which the negative electrode unit is circular according to the present invention;
fig. 10 is a schematic structural view of a negative electrode sheet in which a negative electrode unit is elliptical according to the present invention;
fig. 11 is a cross-sectional view of a negative electrode sheet according to the present invention.
In the figure: 1-positive electrode cover; 2-a negative cover; 3, a positive plate; 4-a separator; 5-negative pole piece; 6-positive electrode unit; 7-a membrane unit; 8-a negative electrode unit; 9-positive connection foil; 10-negative connection foil; 11-terminating the tape; 12-positive pole tab; 13-a negative electrode tab; 14-a layer of aluminium foil; 15-single-side positive electrode dressing layer; 16-copper foil layer; 17-single-sided negative electrode dressing layer; 18-pole set insulation sleeve; 19-an insulating rubber ring; 20-step.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 11, the foldable button lithium battery of the present invention includes a positive electrode cover 1 and a negative electrode cover 2 covering the inner side of the positive electrode cover 1, a pole group is disposed in the positive electrode cover 1, the pole group includes a positive electrode sheet 3, a diaphragm 4 and a negative electrode sheet 5, the positive electrode sheet 3 includes a plurality of continuous positive electrode units 6, the diaphragm 4 includes a plurality of continuous diaphragm units 6, the negative electrode sheet 5 includes a plurality of continuous negative electrode units 7, a diaphragm unit 7 is disposed between the adjacent positive electrode units 6 and the negative electrode unit 8, the end of the positive electrode sheet 3 is provided with a positive electrode connection foil 9, the end of the negative electrode sheet 5 is provided with a negative electrode connection foil 10, and a termination tape 11 is pasted on the outer side of the pole group. The positive plate 3 comprises a plurality of continuously connected positive electrode units 6, the diaphragm 4 comprises a plurality of continuously connected diaphragm units 7, the negative plate 5 comprises a plurality of continuously connected negative electrode units 8, a diaphragm unit 7 is arranged between the adjacent positive electrode units 6 and the negative electrode units 8, the end part of the positive plate 3 is provided with a positive electrode connecting foil 9, the end part of the negative plate 4 is provided with a negative electrode connecting foil 10, the outer side of the pole group is pasted with a termination adhesive tape 11, the positive plate, the diaphragm and the negative plate can finish the manufacture of the pole group in a mode of bending and overlapping edges, the structure is simple, the processing technology is simple, the production efficiency is high, the production cost is low, the pole group insulating sleeve 18 sleeved outside the pole group can prevent the positive plate 3 in the pole group from contacting the inner wall of the negative electrode cover 2 to cause short circuit, the safety of the button cell is improved, meanwhile, the positive electrode units 6 and the negative electrode units 8 are overlapped at intervals, the electric energy generation is facilitated, and the electric energy storage amount of the button cell can be effectively increased, the volume occupied by the pole piece is greatly reduced, the space utilization rate is high, the energy density of the battery is improved, the consistency of the battery can be improved by the single-side coating layer, and the quick charge and rate discharge performance of the battery can be effectively improved.
The bottom of positive plate 3 is connected with positive pole utmost point ear 12, and positive pole utmost point ear 12 is connected with the bottom of anodal lid 1, makes things convenient for being connected between positive plate 3 and the anodal lid 1.
The bottom of the negative plate 5 is connected with a negative pole tab 13, and the negative pole tab 13 is connected with the top of the negative cover 2, so that the negative plate 5 and the negative cover 2 are conveniently connected.
The positive plate 3 comprises an aluminum foil layer 14 and a single-sided positive electrode dressing layer 15 arranged on one surface of the aluminum foil layer 14, the single-sided positive electrode dressing layer 15 is overlapped with the diaphragm 4, and the single-sided positive electrode dressing layer 15 can increase the consistency of the battery.
The negative plate 5 comprises a copper foil layer 16 and a single-sided negative electrode coating layer 17 arranged on one surface of the copper foil layer 16, the single-sided negative electrode coating layer 17 is overlapped with the diaphragm 4, and the single-sided negative electrode coating layer 17 can increase the consistency of the battery.
In a specific embodiment, the shape of the positive electrode unit 6 and the negative electrode unit 8 are both circular, and the size of the positive electrode unit 6 is consistent with that of the negative electrode unit 8, so that the positive electrode unit 6 and the negative electrode unit 8 can be overlapped.
In the implementation process, the shapes of the positive electrode unit 6 and the negative electrode unit 8 are both oval or square or other regular polygons, the diaphragm unit 7 is oval or rectangular, the area of the negative electrode unit 8 is 5% -20% larger than that of the positive electrode unit 6, the area of the diaphragm unit 7 is 5% -20% larger than that of the negative electrode unit 8, alignment folding between the positive electrode unit 6 and the negative electrode unit 8 is facilitated, short circuit is effectively prevented, and meanwhile the positive electrode unit 6 and the negative electrode unit 8 can also be formed by connecting various folding units in the same shape.
The positive electrode connection foil 9 and the negative electrode connection foil 10 each have a length of 3mm to 6mm and a width of 2mm to 5mm, and as a specific embodiment, the positive electrode connection foil 9 and the negative electrode connection foil 10 each have a length of 4mm and a width of 3 mm.
The outside cover of utmost point group is equipped with utmost point group insulating boot 18, prevents that positive plate 3 after folding and negative pole piece 5 do not have the diaphragm 4 cladding and produce the lithium phenomenon of educing, and termination sticky tape 11 is the inflation sticky tape, more does benefit to stack positive plate 3 after establishing and to stretch tightly fixed with negative pole piece 5.
Be equipped with an insulating rubber ring 19 between positive pole lid 1 and the negative pole lid 2, the top of negative pole lid 2 all is equipped with corresponding step 20 with insulating rubber ring 19's top, and the inside bending in top of positive pole lid 1 compresses tightly insulating rubber ring 19 and forms the seal structure of battery, and during sealed, through the whole ring extrusion of step 20 department at negative pole lid 2, make positive pole lid 1 closely laminate with insulating rubber ring 19 and negative pole lid 2, can effectively prevent the weeping.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a foldable knot formula lithium cell which characterized in that: locate including positive polar lid and lid the inboard negative pole lid of positive polar lid, be equipped with utmost point group in the positive polar lid, utmost point group includes positive plate, diaphragm and negative pole piece, positive plate includes a plurality of continuous positive units that connect, the diaphragm includes a plurality of continuous diaphragm units that connect, the negative pole piece includes a plurality of continuous negative units that connect, and is adjacent positive unit with be equipped with a diaphragm unit between the negative pole unit, the tip of positive plate is equipped with anodal connection foil piece, the tip of negative pole piece is equipped with the negative pole and connects foil piece, the outside of utmost point group is pasted and is had the termination sticky tape.
2. The folded lithium button cell of claim 1, wherein: the bottom of the positive plate is connected with a positive pole lug, and the positive pole lug is connected with the bottom of the positive pole cover.
3. The folded lithium button cell of claim 1, wherein: the bottom of the negative plate is connected with a negative pole lug, and the negative pole lug is connected with the top of the negative pole cover.
4. The folded lithium button cell of claim 1, wherein: the positive plate comprises an aluminum foil layer and a single-sided positive electrode dressing layer arranged on one surface of the aluminum foil layer, and the single-sided positive electrode dressing layer is overlapped with the diaphragm.
5. The folded lithium button cell of claim 1, wherein: the negative plate comprises a copper foil layer and a single-sided negative electrode coating layer arranged on one surface of the copper foil layer, and the single-sided negative electrode coating layer is overlapped with the diaphragm.
6. The folded lithium button cell of claim 1, wherein: the positive electrode unit and the negative electrode unit are both circular in shape, and are consistent in size.
7. The folded lithium button cell of claim 1, wherein: the shapes of the positive electrode unit and the negative electrode unit are both elliptical or regular polygonal, and the area of the negative electrode unit is 5-20% larger than that of the positive electrode unit.
8. The folded lithium button cell of claim 1, wherein: the length of the positive electrode connecting foil and the negative electrode connecting foil is 3 mm-6 mm, and the width of the positive electrode connecting foil and the negative electrode connecting foil is 2 mm-5 mm.
9. The folded lithium button cell of claim 1, wherein: and the outer side of the pole group is sleeved with a pole group insulating sleeve, and the termination adhesive tape is an expansion adhesive tape.
10. The folded lithium button cell of claim 1, wherein: an insulating rubber ring is arranged between the positive electrode cover and the negative electrode cover, corresponding steps are arranged on the top of the negative electrode cover and the top of the insulating rubber ring, and the top of the positive electrode cover is bent inwards to press the insulating rubber ring to form a sealing structure of the battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657501.7A CN113206326A (en) | 2021-06-12 | 2021-06-12 | Folding button type lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110657501.7A CN113206326A (en) | 2021-06-12 | 2021-06-12 | Folding button type lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113206326A true CN113206326A (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110657501.7A Pending CN113206326A (en) | 2021-06-12 | 2021-06-12 | Folding button type lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113206326A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021111374A1 (en) | 2021-05-03 | 2022-11-03 | Bayerische Motoren Werke Aktiengesellschaft | Method for manufacturing a battery cell and battery cell |
-
2021
- 2021-06-12 CN CN202110657501.7A patent/CN113206326A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021111374A1 (en) | 2021-05-03 | 2022-11-03 | Bayerische Motoren Werke Aktiengesellschaft | Method for manufacturing a battery cell and battery cell |
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