CN107658423A - Liquid metal alloy pole piece and preparation method, lithium ion battery and preparation method - Google Patents
Liquid metal alloy pole piece and preparation method, lithium ion battery and preparation method Download PDFInfo
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- CN107658423A CN107658423A CN201710666359.6A CN201710666359A CN107658423A CN 107658423 A CN107658423 A CN 107658423A CN 201710666359 A CN201710666359 A CN 201710666359A CN 107658423 A CN107658423 A CN 107658423A
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- liquid metal
- pole piece
- alloy
- metal alloy
- positive electrode
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
- H01M4/662—Alloys
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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
- 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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound 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
- H01M4/04—Processes of manufacture in general
- H01M4/0483—Processes of manufacture in general by methods including the handling of a melt
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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
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to field of batteries, disclose a kind of liquid metal alloy pole piece and preparation method, including liquid metal alloy matrix and alloy material, the liquid metal matrix and the alloy material are mixed and heated to molten condition, obtain the liquid metal alloy pole piece under molten condition.Invention additionally discloses a kind of lithium ion battery and preparation method thereof, including cathode pole piece, positive electrode, barrier film, negative material and liquid metal alloy pole piece, barrier film is located between positive electrode and negative material, coiled material is made in positive electrode, barrier film and negative material, the liquid metal alloy pole piece of molten state is poured on the positive electrode substrate aluminium foil of positive electrode, negative material is connected with cathode pole piece.The liquid metal alloy pole piece of the present invention has a high-flexibility, thermal conductivity, electric conductivity, flexible plastic, solve in battery processing cold pressure procedure due to pole piece hardness is big and welding caused by burr and pierce through positive pole aluminium foil, negative copper foil matrix and barrier film.
Description
Technical field
The present invention relates to field of batteries, more particularly to a kind of liquid metal alloy pole piece and preparation method, lithium-ion electric
Pond and preparation method.
Background technology
With a kind of a large amount of uses of the lithium ion polymer battery as novel lithium battery, to as soft bag lithium ionic cell
Critical piece battery pole piece requirement more and more higher.Anode pole piece main material is made by fine aluminium piece, and cathode pole piece is main
Material is made by pure nickel piece (or copper sheet, nickel plating copper sheet).
In the manufacture craft of the anode pole piece of traditional soft bag lithium ionic cell, be by the topical nickel galvanization on aluminium flake or
Person is welded to nickel sheet on anode pole piece with ultrasonic bonding.Pole piece welding at present need to pass through pole piece prewelding, pole piece trimming, pole piece
Process, the first prewelding such as weldering, pole piece shaping weld eventually again eventually, and welding twice causes prewelding solder joint position to be shaken by twice ultrasonic, easily
Cause the generation of welding slag dust, cause the destruction to battery performance into inside battery.If weldering solder joint covers pole piece to pole piece eventually
Prewelding solder joint, the ultrasonic bond again on original prewelding solder joint can then destroy prewelding solder joint, and welding effect eventually can also be deteriorated.It is complete in addition
Automatic welding complex procedures, welding cost is high, and whole process needs four ultrasonic welding machines, and equipment cost is very high, and power consumption is big,
Battery cost of manufacture is high.
The content of the invention
(1) technical problems to be solved
It is an object of the invention to provide a kind of liquid metal alloy pole piece and preparation method, lithium ion battery and making side
Method, solve in the prior art due to pole piece hardness is big and welding caused by burr and pierce through both positive and negative polarity aluminium foil, copper foil matrix and every
Film, and the problem of welding effect is poor, welding cost is high, equipment cost is high, power consumption is big and battery cost of manufacture is high.
(2) technical scheme
In order to solve the above-mentioned technical problem, a kind of liquid metal alloy pole piece provided by the invention, it is characterised in that including
Liquid metal alloy matrix and alloy material, the liquid metal matrix and the alloy material are mixed and heated to molten
State, obtain the liquid metal alloy pole piece under molten condition.
Wherein, the liquid metal alloy matrix is to sow one or more conjunctions in base, indium base, tinbase, zinc-base and bismuthino
Gold；Or the liquid metal alloy is liquid metal aluminium alloy, liquid metal copper alloy, liquid metal kirsite, liquid metal
One kind in silver alloy or liquid metal nickel alloy.
Wherein, the alloy material is the one or more in metallic aluminium, copper, zinc, silver and nickel.
Wherein, the mass fraction of the liquid metal alloy matrix is 2-88, and the mass fraction of the alloy material is 62-
100。
Invention additionally discloses a kind of preparation method of liquid metal alloy pole piece, it is characterised in that including：
Take the liquid metal alloy matrix that mass fraction is 2-88 parts；
Take the one or more in metallic aluminium, copper, zinc, silver and the nickel that mass fraction is 62-100 parts that alloy material is made；
By above-mentioned liquid metal alloy matrix and alloy material it is well mixed after be heated to 300-400 degrees Celsius, and according to
800rpm speed stirring, makes it fully melt mixing, obtains the liquid metal alloy pole piece of molten state；
Wherein, the liquid metal alloy matrix is to sow one or more conjunctions in base, indium base, tinbase, zinc-base and bismuthino
Gold；Or the liquid metal alloy is liquid metal aluminium alloy, liquid metal copper alloy, liquid metal kirsite, liquid metal
One kind in silver alloy or liquid metal nickel alloy.
Invention additionally discloses a kind of lithium ion battery, it is characterised in that including cathode pole piece, positive electrode, barrier film, negative pole
The liquid metal alloy pole piece of material and the present invention, wherein, the barrier film is located at the positive electrode and the negative material
Between, coiled material is made in the positive electrode, barrier film and negative material, and the positive electrode is connected with liquid metal alloy pole piece,
The negative material is connected with cathode pole piece.
Wherein, the positive electrode including the one or more in cobalt acid lithium, LiMn2O4 and LiFePO4, carbon black and gathers
Vinylidene.
Invention additionally discloses a kind of preparation method of lithium ion battery, it is characterised in that including：
Positive electrode substrate aluminium foil is fixed in one end of positive electrode, negative pole matrix copper foil is fixed in one end of negative material；
Barrier film is located between positive electrode and negative material, and coiled material is made and winds；
The liquid metal alloy pole piece of molten state is poured on positive electrode substrate aluminium foil using liquid metal point tip, cooled down
Afterwards, touched in the junction of liquid metal alloy pole piece with high temperature gummed tape, negative material is fixed on negative pole matrix copper foil.
(3) beneficial effect
A kind of liquid metal alloy pole piece and preparation method provided by the invention, lithium ion battery and preparation method, this hair
Bright liquid metal alloy pole piece has high-flexibility, thermal conductivity, electric conductivity, and is provided with traditional fine aluminium piece anode pole piece and does not have
Standby flexible plastic, solve in battery processing cold pressure procedure due to pole piece hardness is big and welding caused by burr and pierce through just
Pole aluminium foil, negative copper foil matrix and barrier film.The liquid metal alloy pole piece of the present invention, it is uniform to be advantageous to battery current, in reduction
Resistance, discharge capability is improved, traditional pole piece welding procedure rosin joint can also be reduced or cross the situation generation of weldering, and more traditional pole piece
Multiple devices welding procedure cost is lower, and power consumption is lower.
Brief description of the drawings
Fig. 1 is a kind of structure chart of lithium ion battery of the present invention；
Fig. 2 is the expanded view of positive electrode of the present invention and liquid metal alloy pole piece；
Fig. 3 is a kind of structure drawing of device for being used to make lithium ion battery of the present invention.
In figure, 1, liquid metal alloy pole piece；2nd, cathode pole piece；3rd, negative material；4th, barrier film；5th, positive electrode；22nd, it is high
Warm insulating tape；23rd, positive electrode substrate aluminium foil；31st, main control box；32nd, thermal sensation power line；33rd, temperature-controlled cabinet；34th, heater；
35th, naked battery core holding tray；36th, liquid metal point tip；37th, liquid metal chamber.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Following instance
For illustrating the present invention, but it is not limited to the scope of the present invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
The present invention discloses a kind of liquid metal alloy pole piece, it is characterised in that including liquid metal alloy matrix and alloy
Material, the liquid metal matrix and the alloy material are mixed and heated to molten condition, obtain the liquid under molten condition
Metal alloy pole piece 1.
Specifically, the liquid that obtained liquid metal alloy pole piece fusing point at 150-300 DEG C, must melt in a heated state
Metal alloy pole piece has the viscosity flow of high polymer material, and liquid metal alloy pole piece has higher flexible compared with fine aluminium or nickel pole piece
Property, thermal conductivity, electric conductivity, more effectively avoid the pierced risk of both positive and negative polarity aluminium foil, copper foil matrix and barrier film, its thermal conductivity
For 8~100W/ (m DEG C), thermal conductivity factor is at room temperature>10W/mK, electrical conductivity are at room temperature 1~9 × 106Sm-1, are had
It is uniform beneficial to battery current, reduce internal resistance, improve discharge capability.
A kind of liquid metal alloy pole piece disclosed by the invention, has high-flexibility, thermal conductivity, electric conductivity, and be provided with
The flexible plastic that traditional fine aluminium piece anode pole piece does not possess, solve in battery processing cold pressure procedure because pole piece hardness is big and
Burr caused by welding and pierce through positive pole aluminium foil, negative copper foil matrix and barrier film, it is uniform to also help battery current, in reduction
Resistance, improve discharge capability.
Wherein, the liquid metal alloy matrix is to sow one or more conjunctions in base, indium base, tinbase, zinc-base and bismuthino
Gold；Or the liquid metal alloy is liquid metal aluminium alloy, liquid metal copper alloy, liquid metal kirsite, liquid metal
One kind in silver alloy or liquid metal nickel alloy, and liquid metal matrix is made by liquid metal alloy；The alloy material
For the one or more in metallic aluminium, copper, zinc, silver and nickel；The mass fraction of wherein described liquid metal alloy matrix is 2-88,
The mass fraction of the alloy material is 62-100.
Invention additionally discloses a kind of preparation method of liquid metal alloy pole piece, including：Mass fraction is taken as 2-88 parts
Liquid metal alloy matrix；
Take the one or more in metallic aluminium, copper, zinc, silver and the nickel that mass fraction is 62-100 parts that alloy material is made；
By above-mentioned liquid metal alloy matrix and alloy material it is well mixed after be heated to 300-400 degrees Celsius, and according to
800rpm speed stirring, makes it fully melt mixing, obtains the liquid metal alloy pole piece of molten state.
Wherein, the liquid metal alloy matrix is to sow one or more conjunctions in base, indium base, tinbase, zinc-base and bismuthino
Gold；Or the liquid metal alloy is liquid metal aluminium alloy, liquid metal copper alloy, liquid metal kirsite, liquid metal
One kind in silver alloy or liquid metal nickel alloy.
The liquid metal alloy pole piece of the present invention has the viscosity flow of high polymer material in the molten state, using spot welding
Mouth irrigates the battery pole piece into all size, and can solve in the prior art that pole piece hardness is big, burr caused by welding and pierce through
The problem of both positive and negative polarity aluminium foil, copper foil matrix and barrier film.
As shown in figure 1, invention additionally discloses a kind of lithium ion battery, including it is cathode pole piece 2, positive electrode 5, barrier film 4, negative
The liquid metal alloy pole piece 1 of pole material 3 and the present invention, wherein, the barrier film is located at the positive electrode 5 and the negative pole
Between material 3, coiled material, the positive electrode 5 and liquid metal alloy is made in the positive electrode 5, barrier film 4 and negative material 3
Pole piece 1 is connected, and the negative material 3 is connected with cathode pole piece 2.
Wherein, the positive electrode 5 include cobalt acid lithium, LiMn2O4 and LiFePO4 in one or more, carbon black and
Kynoar.
Lithium ion battery disclosed by the invention, its anode pole piece are that the liquid metal as made from liquid metal is matrix closes
Gold, it, which not only has, sows the pliability of based alloy, indium-base alloy, kamash alloy, zinc-containing alloy or bismuth-base alloy, thermal conductivity, together
When had more the electric conductivity of pure aluminum metal, thus it is provided with the flexible plastic that traditional fine aluminium piece anode pole piece does not possess,
Burr will not be produced in processing because of welding to both positive and negative polarity short-circuit risks caused by piercing through barrier film in winding process.Meanwhile this
It is uniform that the just positive piece of liquid metal is advantageous to battery current, reduces internal resistance, improves discharge capability.
As shown in Figures 2 and 3, invention additionally discloses a kind of preparation method of lithium ion battery, it is characterised in that including：
Positive electrode substrate aluminium foil is fixed in one end of positive electrode, negative pole matrix copper foil is fixed in one end of negative material；
Barrier film is located between positive electrode and negative material, and coiled material is made and winds；
The liquid metal alloy pole piece of molten state is poured on positive electrode substrate aluminium foil using liquid metal point tip, cooled down
Afterwards, touched in the junction of liquid metal alloy pole piece with high temperature gummed tape, negative material is fixed on negative pole matrix copper foil.
Specifically, the mode that negative pole is fixed on negative pole matrix copper foil can utilize traditional negative electrode lug fixed form.Such as Fig. 3
Shown, main control box 31 controls temperature-controlled cabinet 33 by temperature control between 150-300 DEG C by thermal sensation power line 32, liquid
Liquid metal alloy pole piece under molten condition is cast in the coiled material being positioned in naked battery core holding tray 35 by metal dots tip 36,
Wherein, coiled material is reeling condition as shown in Figure 1.Specifically, the gap specification of liquid metal point tip 36：Thickness is in 0.05-2mm
Scope is adjustable, and width is adjustable in the range of 2-50mm, can be formulated as requested by an anode pole piece for tip moulding by casting
Specification, touched after cooling in junction high-temperature insulation adhesive tape 22 and be protected from losing, and complete positive pole machining process.Liquid
State metal chamber 37 is used to fill the solid-liquid metal configured in proportion.
A kind of liquid metal alloy pole piece and preparation method provided by the invention disclosed by the invention, lithium ion battery and system
Make method, liquid metal alloy pole piece of the invention has high-flexibility, thermal conductivity, electric conductivity, and is provided with traditional fine aluminium piece
The flexible plastic that anode pole piece does not possess, solve in battery processing cold pressure procedure because pole piece hardness is greatly and caused by welding
Burr and pierce through positive pole aluminium foil, negative copper foil matrix and barrier film.The liquid metal alloy pole piece of the present invention, is advantageous to battery current
Uniformly, reduce internal resistance, improve discharge capability, traditional pole piece welding procedure rosin joint can also be reduced or cross the situation generation of weldering, with
And more traditional pole piece multiple devices welding procedure cost is lower, power consumption is lower.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (8)
- A kind of 1. liquid metal alloy pole piece, it is characterised in that including liquid metal alloy matrix and alloy material, the liquid Metallic matrix and the alloy material are mixed and heated to molten condition, obtain the liquid metal alloy pole piece under molten condition (1)。
- 2. liquid metal alloy pole piece as claimed in claim 1, it is characterised in that the liquid metal alloy matrix is to sow One or more alloys in base, indium base, tinbase, zinc-base and bismuthino；Or the liquid metal alloy be liquid metal aluminium alloy, One kind in liquid metal copper alloy, liquid metal kirsite, liquid metal silver alloy or liquid metal nickel alloy.
- 3. liquid metal alloy pole piece as claimed in claim 1, it is characterised in that the alloy material be metallic aluminium, copper, One or more in zinc, silver and nickel.
- 4. liquid metal alloy pole piece as claimed in claim 1, it is characterised in that the quality of the liquid metal alloy matrix Number is 2-88, and the mass fraction of the alloy material is 62-100.
- A kind of 5. preparation method of liquid metal alloy pole piece, it is characterised in that including：Take the liquid metal alloy matrix that mass fraction is 2-88 parts；Take the one or more in metallic aluminium, copper, zinc, silver and the nickel that mass fraction is 62-100 parts that alloy material is made；By above-mentioned liquid metal alloy matrix and alloy material it is well mixed after be heated to 300-400 degrees Celsius, and according to 800rpm speed stirring, makes it fully melt mixing, obtains the liquid metal alloy pole piece of molten state；Wherein, the liquid metal alloy matrix is to sow one or more alloys in base, indium base, tinbase, zinc-base and bismuthino；Or The liquid metal alloy is liquid metal aluminium alloy, liquid metal copper alloy, liquid metal kirsite, liquid metal silver alloy Or one kind in liquid metal nickel alloy.
- 6. a kind of lithium ion battery, it is characterised in that including cathode pole piece (2), positive electrode (5), barrier film (4), negative material (3) and the liquid metal alloy pole piece (1) in claim 1-5 in any one, wherein, the barrier film is located at the positive pole Between material (5) and the negative material (3), coiled material is made in the positive electrode (5), barrier film (4) and negative material (3), institute State positive electrode (5) to be connected with the liquid metal alloy pole piece (1), the negative material (3) connects with the cathode pole piece (2) Connect.
- 7. lithium ion battery as claimed in claim 6, it is characterised in that the positive electrode (5) includes cobalt acid lithium, LiMn2O4 With the one or more in LiFePO4, carbon black and Kynoar.
- A kind of 8. preparation method of lithium ion battery, it is characterised in that including：Positive electrode substrate aluminium foil is fixed in one end of positive electrode, negative pole matrix copper foil is fixed in one end of negative material；Barrier film is located between positive electrode and negative material, and coiled material is made and winds；The liquid metal alloy pole piece of molten state is poured on positive electrode substrate aluminium foil using liquid metal point tip, after cooling, Touched in the junction of liquid metal alloy pole piece with high temperature gummed tape, negative material is fixed on negative pole matrix copper foil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710666359.6A CN107658423B (en) | 2017-08-07 | 2017-08-07 | Liquid metal alloy pole piece and manufacturing method thereof, lithium ion battery and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710666359.6A CN107658423B (en) | 2017-08-07 | 2017-08-07 | Liquid metal alloy pole piece and manufacturing method thereof, lithium ion battery and manufacturing method thereof |
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| CN107658423A true CN107658423A (en) | 2018-02-02 |
| CN107658423B CN107658423B (en) | 2020-06-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110518278A (en) * | 2019-08-19 | 2019-11-29 | 南方科技大学 | Solid electrolyte and preparation method and solid state battery with cathode interface layer |
| CN112563479A (en) * | 2020-12-10 | 2021-03-26 | 香港理工大学 | Hydrogel-forming zinc negative electrode material, preparation method thereof, negative electrode and battery |
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| CN112563479A (en) * | 2020-12-10 | 2021-03-26 | 香港理工大学 | Hydrogel-forming zinc negative electrode material, preparation method thereof, negative electrode and battery |
| CN112563479B (en) * | 2020-12-10 | 2024-04-30 | 香港理工大学 | Hydrogel-shaped zinc anode material, preparation method thereof, anode and battery |
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| Publication number | Publication date |
|---|---|
| CN107658423B (en) | 2020-06-02 |
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