CN110224172A - Coin shape lithium ion battery and preparation method thereof - Google Patents
Coin shape lithium ion battery and preparation method thereof Download PDFInfo
- Publication number
- CN110224172A CN110224172A CN201910453136.0A CN201910453136A CN110224172A CN 110224172 A CN110224172 A CN 110224172A CN 201910453136 A CN201910453136 A CN 201910453136A CN 110224172 A CN110224172 A CN 110224172A
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- battery
- sealing ring
- cap shell
- cup
- lithium ion
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 125
- 239000008358 core component Substances 0.000 claims abstract description 17
- 239000003792 electrolyte Substances 0.000 claims abstract description 16
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 abstract description 13
- 230000008859 change Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000007812 deficiency Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 241000237983 Trochidae Species 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000469816 Varus Species 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
-
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- H01M50/148—Lids or covers characterised by their shape
- H01M50/153—Lids or covers characterised by their shape for button or coin cells
-
- 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
-
- 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
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
-
- 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
- H01M50/183—Sealing members
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A kind of coin shape lithium ion battery and preparation method thereof, coin shape lithium ion battery includes: battery floor cup, seal assembly, battery cap shell and battery core component, is provided with accommodating chamber in battery floor cup；Seal assembly includes sealing ring, and battery cap shell is set in sealing ring, and battery core component includes battery core and electrolyte.Coin shape lithium ion battery of the invention passes through setting battery floor cup, seal assembly, battery cap shell and battery core component, to carry out sealing operation to cylindrical battery top cover shell by the way of battery floor cup and the sealing of sealing ring bound edge, so, vehicle hole and the throat process in traditional processing operation can be removed, and cylindrical battery top cover shell can be improved whole structural strength, so that only needing the rim of a cup of battery floor cup and sealing ring bending deformation when sealing operation, to guarantee that the inner space of battery cap shell will not change, thus making the space of internal battery core will not change, so that the capacity of button cell is higher.
Description
Technical field
The present invention relates to lithium ion battery manufacturing fields, more particularly to a kind of coin shape lithium ion battery and its preparation side
Method.
Background technique
Button cell is a kind of chamber structure being composed of metal bottom shell and top shell.Bottom case is usually connected with anode,
And top shell is usually connected with cathode.Across one layer of plastic rubber ring (usually polypropylene) between bottom case and top shell.Cushion rubber rises simultaneously
Sealing and insulation function.When sealing, bottom case edge is included to form closed housing with top shell by the extruding varus of mechanical force
Body.Normally, " sandwich " structure that the enclosure interior of button cell is made of the positive plate, diaphragm paper and negative electrode tab of single layer
Battery core, the upper bottom surface that battery core is parallel to shell is horizontal positioned.The capacity of the button cell of the method preparation is very limited.It passes
On system, before button cell sealing, process is also cheated by vehicle, part more than vehicle hole position is occupied for storing top cover cushion rubber
Throat is also wanted after battery seal in the space of battery core, the difference in height clapped also can compressed container battery core space, while there is also because
Inner space is insufficient and leads to pole piece width narrow the problem of cannot producing.
Exception, cylindrical battery can be avoided using metal shell compared to polymer soft-package battery to a certain extent
Since inside battery produces the variation of external size caused by gas.However, the top combination of cylindrical battery needs to occupy centainly
Therefore how space, the design limit that there is itself in the height direction change the structure and production technology of button cell
Into, so as to improve button cell space utilization rate and simplify production technology be this field research staff need solve ask
Topic.
Summary of the invention
The purpose of the present invention is overcoming shortcoming in the prior art, providing one kind, to can be improved button cell structure strong
Degree and the coin shape lithium ion battery and preparation method thereof for simplifying production technology.
The purpose of the present invention is achieved through the following technical solutions:
A kind of coin shape lithium ion battery, comprising:
Battery floor cup is provided with accommodating chamber in the battery floor cup；
Seal assembly, the seal assembly include sealing ring, and the sealing ring is set in the accommodating chamber, and described close
Seal is bonded with the internal chamber wall of the accommodating chamber, and the bottom of the sealing ring is provided with positioning convex ring, the positioning convex ring and institute
The bottom for stating accommodating chamber supports；
Battery cap shell, the battery cap shell are set in the sealing ring, and the battery cap and the sealing
The inner ring wall of circle is bonded；
Bound edge folding portion is provided at the open end of the battery floor cup, when the bound edge folding portion turns down, for making
The opening for stating sealing ring turns down and conforms to the top of the battery cap shell；And
Battery core component, the battery core component include battery core and electrolyte, and the battery core is respectively arranged at the electrolyte
In the accommodating chamber, and the battery core is electrically connected with the battery floor cup and the battery cap shell respectively.
In a wherein embodiment, the battery core component further includes cathode conductive film and cathode conductive film, it is described just
Pole conductive sheet is connect with the anode of the battery core, the cathode connection of battery core described in the cathode conductive film.
In a wherein embodiment, the cathode conductive film is connect with the battery cap shell, the negative conductive
Piece is connect with the battery floor cup.
In a wherein embodiment, the battery core is cylindrical battery core.
In a wherein embodiment, the battery core is laminated cell.
In a wherein embodiment, connection boss is provided at the top of the battery cap shell.
In a wherein embodiment, the top of the battery cap shell is planar structure.
In a wherein embodiment, the sealing ring is sealing rubber ring.
In a wherein embodiment, the battery cap shell is cylindrical structure.
A kind of preparation method including above-mentioned coin shape lithium ion battery comprising following steps:
(1) battery floor cup, sealing ring and battery cap shell are prepared, the sealing ring is pushed into the battery floor cup downward
In accommodating chamber, and it is bonded the sealing ring and the internal chamber wall of the accommodating chamber；
(2) battery core is prepared, the battery core is put into the battery floor cup or the battery core is put into the battery cap
In shell；
(3) battery cap is put into the battery floor cup；
(4) the battery floor cup is fixed with fixture, the rim of a cup of the battery floor cup is squeezed with mold, make the rim of a cup and
The sealing ring bending deformation fastening is on the battery cap shell.
Compared with prior art, the present invention has at least the following advantages:
Coin shape lithium ion battery 10 of the invention passes through setting battery floor cup 100, seal assembly 200, battery cap shell
300 and battery core component 400, thus to cylindrical battery top cover by the way of battery floor cup 100 and the sealing of 210 bound edge of sealing ring
Shell 300 carries out sealing operation, so, it is possible vehicle hole and throat process in removal traditional processing operation, and cylindrical battery top
Lid shell 300 can be improved whole structural strength, so that only being needed when sealing operation by the rim of a cup and sealing ring of battery floor cup 100
210 bend deformation, to guarantee that the inner space of battery cap shell 300 will not change, thus make internal battery core
Space will not change, so that the capacity of button cell is higher；It also avoids leading to pole because of inner space deficiency simultaneously
Piece width narrow the problem of cannot producing.The preparation method of coin shape lithium ion battery of the invention is by by battery floor cup, close
Seal and battery cap shell are directly secured together, and seal snare in battery floor cup, battery cap valve jacket in sealing ring,
Compresses seal is gone to reach sealing function using battery cap shell bottom margin, the process that this technique eliminates vehicle hole and throat,
Increase battery core there are spaces, so as to design more battery capacities, at the same also avoid because inner space deficiency due to cause
Pole piece width narrow the problem of cannot producing.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of the coin shape lithium ion battery of an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the coin shape lithium ion battery of another embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the battery cap shell of an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the battery cap shell of another embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the battery cap shell of another embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the seal assembly of an embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the seal assembly of another embodiment of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
It should be noted that it is used herein about element statement related to another element " connection ", also illustrate that member
Part can swap connection with another element " connection ", fluid therebetween.
In one embodiment, a kind of coin shape lithium ion battery, comprising: battery floor cup, seal assembly, battery cap shell and
Battery core component is provided with accommodating chamber in the battery floor cup；The seal assembly includes sealing ring, and the sealing ring is set to institute
It states in accommodating chamber, and the sealing ring is bonded with the internal chamber wall of the accommodating chamber, the bottom of the sealing ring is provided with convex
Ring, the positioning convex ring and the bottom of the accommodating chamber support；The battery cap shell is set in the sealing ring, and described
Battery cap shell is bonded with the inner ring wall of the sealing ring, and the bottom of the battery cap shell is provided with clamping bulge loop, described close
Seal offers clamping groove on the inner wall of the positioning convex ring, and the clamping bulge loop is connected in the clamping groove；
Bound edge folding portion is provided at the open end of the battery floor cup, when the bound edge folding portion turns down, for making the sealing ring
Opening turn down and overlay to the top of the battery cap shell；The battery core component includes battery core and electrolyte, the battery core
Be respectively arranged in the accommodating chamber with the electrolyte, and the battery core respectively with the battery floor cup and the battery cap
Shell electrical connection.Coin shape lithium ion battery of the invention passes through setting battery floor cup, seal assembly, battery cap shell and battery core group
Part, so that sealing operation is carried out to cylindrical battery top cover shell by the way of battery floor cup and the sealing of sealing ring bound edge, in this way,
Vehicle hole and the throat process in traditional processing operation can be removed, and to can be improved whole structure strong for cylindrical battery top cover shell
Degree, so that only needing the rim of a cup of battery floor cup and sealing ring bending deformation when sealing operation, to guarantee battery cap
The inner space of shell will not change, and the space of internal battery core is thus made not change, so that button cell
Capacity is higher；It also avoids the problem that causing pole piece width is narrow cannot produce because of inner space deficiency simultaneously.
In order to be preferably illustrated to above-mentioned coin shape lithium ion battery, to more fully understand above-mentioned coin shape lithium ion
The design of battery.Referring to Fig. 1, a kind of coin shape lithium ion battery 10, comprising: battery floor cup 100, seal assembly 200, battery
Top cover shell 300 and battery core component 400 are provided with accommodating chamber 110 in battery floor cup 100, and seal assembly 200 includes sealing ring 210,
Sealing ring 210 is set in accommodating chamber 110, and sealing ring 210 is bonded with the internal chamber wall of accommodating chamber 110, the bottom of sealing ring 210
It is provided with positioning convex ring 211, positioning convex ring 211 and the bottom of accommodating chamber 110 support.In the present embodiment, battery floor cup 100 is
Stainless steel bottom cup, sealing ring is cushion rubber, and sealing ring is cylindrical structure.
It should be noted that battery floor cup 100 can be stainless steel bottom cup, the plating metal bottoms cup such as steel shell or aluminum hull,
It can be base cup structure made of other metals, battery floor cup 100 is cylindrical structure open at one end, wherein battery floor cup
100 are internally provided with accommodating chamber 110, and accommodating chamber 110 is for storing battery core and filling electrolyte；The bottom of sealing ring 210 is set
It is equipped with positioning convex ring 211, when sealing ring 210 is placed on by artificial or corresponding robotic device the receiving of battery floor cup 100
When chamber 110, sealing ring 210 is supported by the positioning convex ring 211 of bottom and the bottom of accommodating chamber 110, in this way, making sealing ring
210 can fast and accurately install to battery floor cup 100, and can be improved whole installation accuracy, so that overall structure is strong
Degree is strengthened.After sealing ring is installed, by the elastic acting force of sealing ring, enable sealing ring fit closely to
The internal chamber wall of accommodating chamber 110 so, it is possible so that overall structure is more compact, and can obtain the space utilization rate of accommodating chamber 110
It is improved, to improve battery capacity.
Referring to Fig. 1, battery cap shell 300 is set in sealing ring 210, and battery cap shell 300 and sealing ring
210 inner ring wall fitting, the bottom of battery cap shell 300 are provided with clamping bulge loop 310, and sealing ring is close to positioning convex ring 211
Clamping groove 220 is offered on inner wall, clamping bulge loop 310 is connected in clamping groove 220.In the present embodiment, battery cap
Shell 300 is cylindrical structure.
As shown in figure 3, the structure chart of the battery cap shell 300 for an embodiment of the present invention, the battery cap shell 300
Material can be nickel, aluminium, composite material or other metals, the clamping bulge loop 310 positioned at 300 bottom of battery cap shell
It outwardly protrudes, when putting into sealing ring 210, clamping bulge loop 310 is located on the positioning convex ring 211 of sealing ring 210, while energy
It is enough to be connected and fixed by clamping bulge loop 310 and the clamping groove 220 of sealing ring, so that overall structure is more stepped up
It gathers and securely, to improve the stability of battery entirety.
As shown in figure 4, the structure chart of the battery cap shell 300a for another embodiment of the present invention, the battery cap shell
The material of 300a can be nickel, aluminium, composite material or other metals, and the clamping positioned at the bottom battery cap shell 300a is convex
Ring 310a is inwardly projecting, and when putting into sealing ring 210, clamping bulge loop 310a is located at the positioning convex ring 211 of sealing ring 210
On, and be clamped bulge loop 310a and offset with positioning convex ring 211, it so, it is possible to improve whole structure when sealing processing, and energy
Enough improve installation accuracy.
As shown in figure 5, the structure chart of the battery cap shell 300b for another embodiment of the present invention, the battery cap shell
The material of 300b can be nickel, aluminium, composite material or other metals, the top cover shell bottom 310b of the battery cap shell 300b
Outboard sidewalls be flat configuration, no projective structure so, it is possible so that battery cap shell 300b is more easily inserted sealing
In circle 210, so that battery production process operation is more convenient.
As shown in fig. 6, the structure chart of the sealing ring 210 for an embodiment of the present invention, the bottom of the sealing ring 210 is set
It is equipped with positioning convex ring 211, when sealing ring 210 is placed on by artificial or corresponding robotic device the receiving of battery floor cup 100
When chamber 110, sealing ring 210 is supported by the positioning convex ring 211 of bottom and the bottom of accommodating chamber 110, in this way, making sealing ring
210 can fast and accurately install to battery floor cup 100, and can be improved whole installation accuracy, so that overall structure is strong
Degree is strengthened.Sealing ring offers clamping groove 220, the sealing ring in the present embodiment on the inner wall of positioning convex ring 211
210 are engaged by clamping for being provided with the clamping bulge loop 310 outwardly protruded with 300 bottom of battery cap shell, so, it is possible to lead to
Cross clamping bulge loop 310 and the clamping groove 220 of sealing ring connected and fixed so that overall structure it is more compact and
Securely, to improve the stability of battery entirety.
As shown in fig. 7, the structure chart of the sealing ring 210a for another embodiment of the present invention, the bottom of the sealing ring 210
Portion is provided with positioning convex ring 211a, when sealing ring 210a is placed on battery floor cup 100 by artificial or corresponding robotic device
Accommodating chamber 110 when, sealing ring 210a is supported by the positioning convex ring 211a of bottom and the bottom of accommodating chamber 110, in this way, making
Sealing ring 210a can fast and accurately be installed to battery floor cup 100, and can be improved whole installation accuracy, so that whole
Structural strength is strengthened.In the present embodiment, sealing ring 210a inner wall is flat configuration, and nothing opens up clamping groove, the structure
For being provided with inwardly projecting clamping bulge loop with battery cap shell bottom or battery cap shell without clamping bulge loop is installed
Cooperation saves production cost so as to simplify the production technology of sealing ring 210a.Further, the opening of battery floor cup 100
Bound edge folding portion 120 is provided at end, when bound edge folding portion 120 turns down, for turning down the opening of sealing ring 210 and overlaying
To the top of battery cap shell 300.
It should be noted that battery cap shell 300 is the shell structure of cylindrical shape, middle sheet is electric compared with the existing technology
The battery cap shell 300 of Chi Gai, cylindrical shape shell structure can be improved the structural strength of battery entirety, to avoid in battery
100 inner space of battery floor cup is caused to compress when sealing processing, thus, it is possible to guarantee that inside battery space and capacity are kept constant,
So that the production quality of battery is improved.When the insertion of battery cap shell 300 is placed in accommodating chamber 110, battery cap shell
300 are offseted by clamping bulge loop 310 and the positioning convex ring 211 of sealing ring 210, so, it is possible to improve battery cap shell 300
Installation accuracy so that whole installation processing efficiency is improved, meanwhile, battery cap shell 300 by clamping bulge loop 310 with it is close
The clamping groove 220 of seal 210 is connected and fixed, so as to make battery cap shell 300 be fixed on accommodating chamber 110
It is interior, it so, it is possible to improve integrally-built intensity, prevent battery from internal element being caused to shake or damage when falling and touching；Electricity
After the completion installation of pond top cover shell 300 is fixed, sealing ring 210 can be squeezed by installing active force, so that battery cap
The inner ring wall of shell 300 and sealing ring 210, which fits closely, so, it is possible together so that the inner space of accommodating chamber 110 is filled
Divide and utilize, thereby guarantees that inside battery space and capacity are kept constant, so that the production quality of battery is improved.Complete battery
After the installation of top cover shell 300, the bound edge folding portion 120 at the open end of battery floor cup 100 is sealed by mechanical pressure
Bound edge extrusion operation, so that bound edge folding portion 120 is turned down to the direction of battery cap shell 300, to make sealing ring 210
Opening is turned down and is overlayed to the top of battery cap shell 300, in this way, being located at the sealing of 300 top section of battery cap shell
Circle 210 can be conformed at battery cap shell 300 by compression seal, to play sealing function, and inside battery can be prevented electric
Liquid leakage is solved, double protection is thus reached.In the present embodiment, battery cap shell 300 can be nickel aluminium composite material or
Other metal materials of person are made.
Referring to Fig. 1, battery core component 400 includes battery core 410 and electrolyte, and battery core 410 is respectively set with electrolyte
In in accommodating chamber 110, and battery core 410 is electrically connected with battery floor cup 100 and battery cap shell 300 respectively.
Further, battery core component 400 further includes cathode conductive film 420 and cathode conductive film 430, cathode conductive film 420
It is connect with the anode of battery core, cathode conductive film 430 is connect with the cathode of battery core.Wherein, cathode conductive film 420 also and battery cap
Shell 300 connects, and cathode conductive film 430 is also connect with battery floor cup 100, to realize battery core and battery floor cup 100 and battery top
The electrical connection of lid shell 300 operates.
It should be noted that battery core 410 and electrolyte are respectively arranged in accommodating chamber 110, and battery core 410 is led by anode
Electric piece 420 is connect with battery cap shell 300, and battery core 410 is connect by cathode conductive film 430 with battery floor cup 100, to realize
Battery core and battery floor cup 100 and battery cap shell 300 are electrically connected operation.
As shown in Fig. 2, the structure chart of the coin shape lithium ion battery 20 for another embodiment of the present invention, the coin shape
The battery core of lithium ion battery 20 is cylindrical battery core 400a, specifically, cylinder battery core 400a includes positive plate, diaphragm and cathode
Piece, cylindrical battery core are wound into cylinder by the way that positive plate, diaphragm and negative electrode tab to be sequentially arranged on coiling machine, by coiling machine
Wind battery core, wherein diaphragm is set between positive plate and negative electrode tab, and cylindrical roll is diaphragm around the outermost layer of battery core.
In another embodiment, battery core is laminated cell, specifically can refering to fig. 1, laminated cell by negative electrode tab, every
Film paper and positive plate successively stack several layers, and diaphragm paper is put between positive plate and negative electrode tab, and top bottom surface is all placed with diaphragm paper,
To obtain laminated cell.
In one embodiment, the top of battery cap shell 300 is provided with connection boss 320, in this way, passing through connection boss
320 can be electrically connected with external component；For another example, the top of battery cap shell be planar structure, so, it is possible so that
Overall structure is more compact, so that overall structural strength is improved.
Coin shape lithium ion battery 10 of the invention passes through setting battery floor cup 100, seal assembly 200, battery cap shell
300 and battery core component 400, thus to cylindrical battery top cover by the way of battery floor cup 100 and the sealing of 210 bound edge of sealing ring
Shell 300 carries out sealing operation, so, it is possible vehicle hole and throat process in removal traditional processing operation, and cylindrical battery top
Lid shell 300 can be improved whole structural strength, so that only being needed when sealing operation by the rim of a cup and sealing ring of battery floor cup 100
210 bend deformation, to guarantee that the inner space of battery cap shell 300 will not change, thus make internal battery core
Space will not change, so that the capacity of button cell is higher；It also avoids leading to pole because of inner space deficiency simultaneously
Piece width narrow the problem of cannot producing.
A kind of preparation method of coin shape lithium ion battery comprising following steps:
(1) battery floor cup, sealing ring and battery cap shell are prepared, the sealing ring is pushed into the battery floor cup downward
In accommodating chamber, and it is bonded the sealing ring and the internal chamber wall of the accommodating chamber；
Wherein, the bottom of sealing ring 210 is provided with positioning convex ring 211, and sealing ring 210 is had the positioning convex ring 211
One end lay flat to the rim of a cup of the battery floor cup, then sealing ring 210 is pushed into the accommodating chamber 110 of the battery floor cup,
So that the positioning convex ring 211 and the bottom of the accommodating chamber 110 offset, to complete the installation operation of sealing ring.
(2) battery core is prepared, the battery core is put into the battery floor cup or the battery core is put into the battery cap
In shell；
Wherein, battery core can be cylindrical battery core or laminated cell；The preparation process of the cylinder battery core includes as follows
Step:
1, positive plate, diaphragm paper and negative electrode tab are sequentially arranged on coiling machine, are wound into core；
2, diaphragm is set between positive plate and negative electrode tab, and core outermost layer is diaphragm, to obtain cylindrical battery core.
The preparation process of the laminated cell includes the following steps:
1, negative electrode tab, diaphragm paper and positive plate successively being stacked into several layers, diaphragm paper is put between positive plate and negative electrode tab,
And top bottom surface is all placed with diaphragm paper, to obtain laminated cell.
It should be noted that the battery core of preparation is put into the electricity after the preparation of the cylindrical battery core of completion or laminated cell
It is put into the battery cap shell in bottom of pond cup or by the battery core battery core of preparation, to complete battery core installation placement operation.If electric
Core is placed in battery floor cup, then specifically comprises the following steps: to curve inwardly the pole piece in battery core close to battery floor cup, so
Entire battery core is put into afterwards in the bottom cup for being equipped with insulation bottom meson and sealing ring, the guide card of a pole piece is then welded on battery top
On lid shell, in addition the guide card of a pole piece is welded on the bottom of a cup of battery floor cup, meanwhile, the top and bottom end of battery core are respectively equipped with insulation
Meson and insulation bottom meson are pushed up, to play insulation protection.It, first will entire electricity if battery core is placed in battery cap shell
Core is put into battery cap shell, and the guide card that will be close to a pole of the battery cap shell is welded on battery cap shell, then
The guide card of an other pole is welded on to the bottom of a cup of battery floor cup.In the present embodiment, the guide card welding manner of battery core positive and negative anodes can
To carry out in the following way, positive guide card and battery cap shell are welded, and cathode guide card is connect with battery floor cup 100.
(3) battery cap is put into the battery floor cup；Battery cap is put into the battery floor cup described
Further include following steps in operation:
Electrolyte fill operations electrolyte are added in the accommodating chamber of battery floor cup, if battery core is to be firstly placed on battery at this time
In the cup of bottom, then after electrolyte is added needs that battery cap is made to avoid battery core, then be inserted in again into sealing rubber ring, in this way, energy
Battery cap shell is enough avoided to collide with battery core；If battery core is firstly placed in battery cap shell at this time, electrolyte is added
The inversion of battery floor cup is covered on battery cap afterwards, so, it is possible to guarantee that the amount that electrolyte is added every time is more accurate.
(4) the battery floor cup is fixed with fixture, the rim of a cup of the battery floor cup is squeezed with mold, is made by sealing operation
The rim of a cup and sealing ring bending deformation fastening are on the battery cap shell.
It should be noted that the bottom effect of being under pressure of battery cap shell can make to be located at battery floor in sealing operation
211 compressive deformation of positioning convex ring at cup bottom of a cup position, thus come into full contact with battery cap shell with battery floor cup, meanwhile, it is fixed
Position bulge loop 211 plays the role of buffering resistance to compression, and capable of preventing battery cap shell, deformation occurs under pressure, to guarantee inside
Space is kept constant；By using the extruding of sealing die, so that the rim of a cup of battery floor cup is carried out to the direction of battery cap shell
Fold overlays the sealing rubber ring at rim of a cup to the top of battery cap shell, thus completes battery seal operation.
Compared with prior art, the present invention has at least the following advantages:
Coin shape lithium ion battery 10 of the invention passes through setting battery floor cup 100, seal assembly 200, battery cap shell
300 and battery core component 400, thus to cylindrical battery top cover by the way of battery floor cup 100 and the sealing of 210 bound edge of sealing ring
Shell 300 carries out sealing operation, so, it is possible vehicle hole and throat process in removal traditional processing operation, and cylindrical battery top
Lid shell 300 can be improved whole structural strength, so that only being needed when sealing operation by the rim of a cup and sealing ring of battery floor cup 100
210 bend deformation, to guarantee that the inner space of battery cap shell 300 will not change, thus make internal battery core
Space will not change, so that the capacity of button cell is higher；It also avoids leading to pole because of inner space deficiency simultaneously
Piece width narrow the problem of cannot producing.The preparation method of coin shape lithium ion battery of the invention is by by battery floor cup, close
Seal and battery cap shell are directly secured together, and seal snare in battery floor cup, battery cap valve jacket in sealing ring,
Compresses seal is gone to reach sealing function using battery cap shell bottom margin, the process that this technique eliminates vehicle hole and throat,
Increase battery core there are spaces, so as to design more battery capacities, at the same also avoid because inner space deficiency due to cause
Pole piece width narrow the problem of cannot producing.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of coin shape lithium ion battery characterized by comprising
Battery floor cup is provided with accommodating chamber in the battery floor cup；
Seal assembly, the seal assembly include sealing ring, and the sealing ring is set in the accommodating chamber, and the sealing ring
It is bonded with the internal chamber wall of the accommodating chamber, the bottom of the sealing ring is provided with positioning convex ring, the positioning convex ring and the appearance
Receiving the bottom of chamber supports；
Battery cap shell, the battery cap shell are set in the sealing ring, and the battery cap and the sealing ring
The fitting of inner ring wall；
Bound edge folding portion is provided at the open end of the battery floor cup, it is described close for making when the bound edge folding portion turns down
The opening of seal turns down and conforms to the top of the battery cap shell；And
Battery core component, the battery core component include battery core and electrolyte, and the battery core and the electrolyte are respectively arranged at described
In accommodating chamber, and the battery core is electrically connected with the battery floor cup and the battery cap shell respectively.
2. coin shape lithium ion battery according to claim 1, which is characterized in that the battery core component further includes that anode is led
Electric piece and cathode conductive film, the cathode conductive film are connect with the anode of the battery core, battery core described in the cathode conductive film
Cathode connection.
3. coin shape lithium ion battery according to claim 2, which is characterized in that the cathode conductive film and the battery
The connection of top cover shell, the cathode conductive film are connect with the battery floor cup.
4. coin shape lithium ion battery according to claim 1, which is characterized in that the battery core is cylindrical battery core.
5. coin shape lithium ion battery according to claim 1, which is characterized in that the battery core is laminated cell.
6. coin shape lithium ion battery according to claim 1, which is characterized in that the top of the battery cap shell is arranged
There is connection boss.
7. coin shape lithium ion battery according to claim 1, which is characterized in that the top of the battery cap shell is flat
Face structure.
8. coin shape lithium ion battery according to claim 1, which is characterized in that the sealing ring is sealing rubber ring.
9. coin shape lithium ion battery according to claim 1, which is characterized in that the battery cap shell is cylindrical body knot
Structure.
10. the preparation method of coin shape lithium ion battery described in a kind of one of claim 1~9, which is characterized in that it include with
Lower step:
(1) battery floor cup, sealing ring and battery cap shell are prepared, the sealing ring is pushed into the receiving of the battery floor cup downward
It is intracavitary, and it is bonded the sealing ring and the internal chamber wall of the accommodating chamber；
(2) battery core is prepared, the battery core is put into the battery floor cup or the battery core is put into the battery cap shell；
(3) battery cap is put into the battery floor cup；
(4) the battery floor cup is fixed with fixture, the rim of a cup of the battery floor cup is squeezed with mold, make the rim of a cup and described
Sealing ring bending deformation fastens on the battery cap shell.
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| CN201910453136.0A CN110224172A (en) | 2019-05-28 | 2019-05-28 | Coin shape lithium ion battery and preparation method thereof |
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