CN108258319B - A kind of arc battery component and preparation method thereof, arc battery - Google Patents
A kind of arc battery component and preparation method thereof, arc battery Download PDFInfo
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- CN108258319B CN108258319B CN201611238525.4A CN201611238525A CN108258319B CN 108258319 B CN108258319 B CN 108258319B CN 201611238525 A CN201611238525 A CN 201611238525A CN 108258319 B CN108258319 B CN 108258319B
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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
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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
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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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Abstract
A kind of arc battery component, it is overlapped mutually by multiple arcs pole piece component, each arc-shaped pole piece component is made of the arc anode pole piece, arc electric core membrane and arc cathode pole piece that are sequentially overlapped, both ends are welded with positive and negative electrode tab respectively, the arc anode pole piece of each layer, arc cathode pole piece, arc electric core membrane successively end to end formation S-shaped anode pole piece, S-shaped cathode pole piece and S-shaped electric core membrane；The production of the arc battery component includes: first to be coated with battery positive and negative electrode pole piece, reserves folding line trough and tab trough；Positive and negative electrode tab is welded in tab trough；Again positive and negative electrode pole piece is wound into the first arc length on a core, turn to cut-off needle with one and fix folding line trough, continues the second arc length of reverse winding, then cut-off needle is fixed on tab trough；Repeatedly until reaching number of plies requirement；Positive and negative electrode tab is closed and is welded, the production of arc battery component is completed.The present invention is remarkably improved the volume energy density and safety of equipment.
Description
Technical field
The invention belongs to lithium battery technical field more particularly to a kind of flexible battery component and preparation method thereof and arcs
Shape battery.
Background technique
It is well known that current commercialized monomer lithium ion battery shape, mainly has: (1) being led with being applied to consumer 3C
The cube shape of the products such as smart phone, the lithographic plate computer in domain；(2) it is produced with applying in electric tool, electric car, electronic watch etc.
It is 18650 equal cylindricals of representative on product；(3) flat on wearable device such as earphone, motion bracelet product to apply
Face Special-shaped battery.
For current intelligent wearable device market, existing traditional battery technology takes the mode of " breaking the whole up into parts ",
Battery space available in wearable device is first divided into small space regular as far as possible, then is come by the small bulk after segmentation
Design produces small battery cell, is then arranged in parallel or in series in small battery cell and comes together to realize that battery is empty in equipment
Between utilization.And such traditional mode, often increase the series-parallel number of battery, while causing battery assembly technique and filling
The complication of electric discharge management system (PCM).On the other hand, battery space is divided smaller, i.e., the size of small battery cell
Smaller, energy density is lower, in turn results under same units space, and the working time of smart machine is short, customer experience decline
The problems such as.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
Kind arc battery component and preparation method thereof and arc battery, to facilitate battery applications on specific battery product, raising is set
Standby volume energy density and safety.
In order to solve the above technical problems, technical solution proposed by the present invention is a kind of arc battery component, the arc electricity
Pond component is mainly overlapped mutually by multiple arcs pole piece component, and each arc-shaped pole piece component is the arc by being sequentially overlapped
Anode pole piece, arc electric core membrane and arc cathode pole piece composition, one end of the arc battery component are welded with positive pole ear, institute
The other end for stating arc battery component is welded with negative lug, the successively head and the tail phase of the arc anode pole piece in each layer arc battery component
It connects to form serpentine anode pole piece, the successively end to end formation serpentine cathode of the arc cathode pole piece in each layer arc battery component
Pole piece, arc electric core membrane in each layer arc battery component successively end to end formation serpentine electric core membrane.
Above-mentioned arc battery component, it is preferred that between the two neighboring arc anode pole piece of the serpentine anode pole piece
There are the folding line trough of transition or tab troughs；Between the two neighboring arc cathode pole piece of the serpentine cathode pole piece
There are the folding line trough of transition or tab troughs.
In above-mentioned arc battery component, it is preferred that the length of each arc-shaped pole piece component in the arc battery component
It is gradually increased from inside to outside by rule, forms the length of each arc anode pole piece of the serpentine anode pole piece from inside to outside
Gradually increased by rule, form each arc cathode pole piece of the serpentine cathode pole piece length press from inside to outside rule by
Cumulative to add, the length for forming each arc electric core membrane of the serpentine electric core membrane is gradually increased by rule from inside to outside.
It is preferred in above-mentioned arc battery component: the multiple arc-shaped pole piece component be continuously wind same cylinder or
Semicolumn core is bent.
Preferred in above-mentioned arc battery component: the inside cambered surface of place arc battery component turns around the core
The central angle alpha that axis is formed is 0 ° < α < 360 °, and radius distance R≤50mm of the inside cambered surface and aforementioned rotation axis.
Preferred in above-mentioned arc battery component: the positive electrode coated on the arc anode pole piece includes cobalt acid
One of lithium, nickle cobalt lithium manganate, LiFePO4, nickel cobalt lithium aluminate；The negative electrode material packet coated on the arc cathode pole piece
Include one of artificial graphite, natural graphite, carbonaceous mesophase spherules, hard carbon, graphene, lithium titanate.Arc anode of the invention
The cobalt acid lithium material of 3C class is particularly preferably coated on pole piece, energy density is high, and operating voltage is high, and cathode preferred natural graphite
Or artificial graphite, capacity is high, and cycle performance is excellent.These positive and negative pole materials and arc battery component of the invention match
It closes, is in particularly suitable to be applied in the battery of intelligent wearable device.
As a general technical idea, a kind of production method of above-mentioned arc battery component, step include:
(1) it is coated with battery positive and negative electrode pole piece (coating preferably uses contact coating machine), reserves folding line trough and tab
Trough；
(2) enter tab welding after above-mentioned pole piece drying, weld positive and negative electrode tab in the reserved tab trough；
(3) the positive and negative electrode pole piece after above-mentioned steps (2) is carried out using winding method, after one arc length of every winding, is turned to and is cut
Only needle replaces, and is fixed on corresponding folding line trough or tab trough；Specifically, by the positive and negative electrode pole after above-mentioned steps (2)
Piece winds the first arc length on a cylinder or semicolumn core, is fixed on a cut-off needle reserved close to the folding line after the first arc length
Continue inversely to wind the second arc length along the core, then reserved the tab that needle is fixed on close to the second arc length tail portion is ended in area
Area；
The above operation for continuing to repeat this step, be sequentially completed third arc length ..., the winding of 2n arc length, n be greater than
Positive integer equal to 1, until reaching the electric core winding number of plies requirement of technique initialization；
(4) after the completion of the electric core winding of above-mentioned steps (3), the positive and negative electrode tab is closed weldering, and (closing weldering welding manner can be with
For one of modes such as electric welding, supersonic welding, Laser Welding or several), complete the production of arc battery component.
Above-mentioned production method, preferred: in the step (1), the coating of the positive and negative electrode pole piece is all made of compartment
Coating method, the compartment coating method of the anode pole piece refer on a continuous plus plate current-collecting body with " S1-D1-S2-
D2-……-Sn-1-Dn-1-Sn-Dn" mode be coated with, and n is positive even numbers more than or equal to 2；The compartment of the cathode pole piece applies
Mode for cloth refers on a continuous negative current collector with " S1-D1-S2-D2-……-Sm-1-Dm-1-Sm-Dm" mode be coated with, and
M is the positive even numbers more than or equal to 2；Wherein S1、……SnIndicate positive electrode applying area, S1、……SmIndicate negative electrode material coating
Area, D1、D3……Dn-1And D1、D3……Dm-1Indicate folding line trough, D2、D4……DnAnd D2、D4……DmIndicate
Tab trough.
Above-mentioned production method, preferred: the length of the tab trough is 5-20mm, the length of the folding line trough
Degree is 1-10mm；Using welding manner in the tab trough, (welding manner can be electric welding, supersonic welding, Laser Welding etc.
One of mode is several) soldering polar ear, the size of tab is that tab reserves the 1/3~1/2 of section length.
Above-mentioned production method, it is preferred: the positive electrode applying area S1、……SnLength it is incremented by successively；It is described negative
Pole material applying area S1、……SmLength it is incremented by successively.
As a general technical idea, the present invention also provides a kind of arc battery components of aforementioned present invention to be prepared
Arc battery；The preparation of the arc battery need to only place it in and battery core after above-mentioned arc battery component completes
Matched aluminum hull or aluminum plastic film, routinely the works such as subsequent fluid injection, sealing, chemical conversion, test are completed in lithium ion battery process flow
Sequence.
Compared with the prior art, the advantages of the present invention are as follows:
(1) arc battery component of the invention and arc battery can produce difference according to different design requirements
Central angle, and then it is suitable for the lithium ion battery of different radians, this has just greatly enriched the application range of lithium ion battery；
(2) arc battery component of the invention and arc battery are the continuous detour folding technology production used, are avoided
The generation for the rough sledding that outer layer pole piece tensile stress caused by existing physics bending mode is big, internal layer pole piece compression is big；It ties again
The incrementally pole coating mode in preferred embodiment is closed, the alternation requirement between battery core outer arc and inner arc is thoroughly solved, significantly mentions
The high safety of battery material；
(3) in currently preferred arc battery component and arc battery, folding line trough and tab trough are increased
Setting, this avoid electrode slice fold lose powder the problem of, substantially increase the security performance of material；At the same time, also subtract
Lacked the battery active material dosage that cannot effectively play capacity, avoided the waste of battery active material, reduce technique at
This.
In general, arc battery component of the invention and arc battery are with higher volume energy density and preferably
Safety, and manufacture craft is simple and convenient, at low cost, properties of product are stablized, and safety is good, in lithium ion battery applications field,
Especially in the battery applications of biologic medical and intelligent wearable device, have a good application prospect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the appearance diagram of arc battery component in the specific embodiment of the invention.
Fig. 2 is the cross-sectional structure schematic diagram of arc battery component in the specific embodiment of the invention.
Fig. 3 is that positive/negative pole piece bends preceding coating method schematic diagram in the specific embodiment of the invention.
Fig. 4 is the serpentine anode pole piece schematic shapes formed after positive plate bending in the specific embodiment of the invention.
Marginal data
1, arc anode pole piece；
2, arc electric core membrane；
3, arc cathode pole piece；
4, positive pole ear；
5, negative lug.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
It should be strongly noted that when to be described as " be fixed on, be fixed in, be connected to or be connected to " another for a certain element
When on element, it can be directly fixed, affixed, connection or is connected on another element, be also possible to by connecting among other
Fitting is indirectly fixed, affixed, connects or is connected on another element.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
A kind of arc battery component of the invention as shown in Figure 1 and Figure 2, the arc battery component is mainly by multiple arcs pole
Piece component is overlapped mutually, and each arc-shaped pole piece component is arc anode pole piece 1, the arc electric core membrane by being sequentially overlapped
2 and arc cathode pole piece 3 form, one end of the arc battery component is welded with positive pole ear 4, the other end of the arc battery component
It is welded with negative lug 5, the successively end to end formation serpentine anode pole piece of the arc anode pole piece 1 in each layer arc battery component
(referring to fig. 4), the successively end to end formation serpentine cathode pole piece of the arc cathode pole piece 3 in each layer arc battery component, each layer
Arc electric core membrane 2 in arc battery component successively end to end formation serpentine electric core membrane.
In above-mentioned arc battery component, there are transition between the two neighboring arc anode pole piece of serpentine anode pole piece
Folding line trough or tab trough；Equally there are transition between the two neighboring arc cathode pole piece of serpentine cathode pole piece
Folding line trough or tab trough.
The length of each arc-shaped pole piece component is gradually increased by rule from inside to outside in above-mentioned arc battery component, specifically
, the length for organizing each arc anode pole piece 1 of anode pole piece in "S" shape is gradually increased by interior to by rule outside, is organized in "S" shape
The length of each arc cathode pole piece 3 of cathode pole piece is gradually increased by rule from inside to outside, organizes the every of electric core membrane in "S" shape
The length of a arc electric core membrane 2 is gradually increased by rule from inside to outside.Gradually increasing by rule herein refers to such as Fig. 2 institute
Show, according to the plane geometry Computing Principle of layer arc-shaped pole piece arc length each after stacking, length and thickness show successively regular
Incremental trend (reference can be made to calculation formula in specific embodiment).
Above-mentioned multiple arcs pole piece component is continuously to wind same cylinder core to bend.As shown in Fig. 2, arc is electric
The inside cambered surface of pond component rotate core shaft (being not shown in Fig. 2, for across the centre dot of paper) formed central angle alpha be
0 ° < α < 360 °, and the radius distance R of inside cambered surface and aforementioned rotation axis0≤50mm。
In above-mentioned arc battery component, the positive electrode coated on arc anode pole piece 1 includes cobalt acid lithium, nickel cobalt mangaic acid
One of lithium, LiFePO4, nickel cobalt lithium aluminate；The negative electrode material coated on arc cathode pole piece 3 includes artificial graphite, natural
One of graphite, carbonaceous mesophase spherules, hard carbon, graphene, lithium titanate.
A kind of production method of above-mentioned arc battery component, step include:
(1) as shown in Figure 3, Figure 4, it is coated with battery positive and negative electrode pole piece (coating uses contact coating machine), it is pre- to reserve folding line
Stay area and tab trough；The coating of the positive and negative electrode pole piece is all made of compartment coating method, the compartment coating of anode pole piece
Mode refers on a continuous plus plate current-collecting body with " S1-D1-S2-D2-……-Sn-1-Dn-1-Sn-Dn" mode be coated with, and n
For the positive even numbers more than or equal to 2；The compartment coating method of cathode pole piece refers on a continuous negative current collector with " S1-
D1-S2-D2-……-Sm-1-Dm-1-Sm-Dm" mode be coated with, and m is that (coating of cathode can refer to for positive even numbers more than or equal to 2
Fig. 3, Fig. 4)；
Wherein S1、……SnIndicate positive electrode applying area, S1、……SmIndicate negative electrode material applying area, D1、D3……
Dn-1And D1、D3……Dm-1Indicate folding line trough, D2、D4……DnAnd D2、D4……DmIndicate tab trough；
The length of tab trough is 5-20mm, and the length of folding line trough is 1-10mm；In tab trough using welding manner (weldering
The mode of connecing can be one of modes such as electric welding, supersonic welding, Laser Welding or several) soldering polar ear, the size of tab is
Tab reserves the 1/3~1/2 of section length；
In addition, positive electrode applying area S1、……SnLength it is incremented by successively；Negative electrode material applying area S1、……SmLength
It spends incremented by successively；
(2) enter tab welding after above-mentioned pole piece drying, weld positive and negative electrode tab in reserved tab trough；
(3) the positive and negative electrode pole piece after above-mentioned steps (2) is carried out using winding method, after one arc length of every winding, is turned to and is cut
Only needle replaces, and is fixed on corresponding folding line trough or tab trough；Specifically, by the positive and negative electrode pole after above-mentioned steps (2)
Piece winds the first arc length on a cylinder core, turns to cut-off needle with one and is fixed on close to the folding line trough after the first arc length,
Continue inversely to wind the second arc length along the core, then cut-off needle is fixed on the tab trough close to the second arc length tail portion；
The above operation for continuing to repeat this step, be sequentially completed third arc length ..., the winding of 2n arc length, n be greater than
Positive integer equal to 1, until reaching the electric core winding number of plies requirement of technique initialization；
Need it is especially mentioned that, when specific operating winding starts, we especially first by the bar shaped cathode after coating
(anode) pole piece is superimposed with diaphragm and is placed on core, after the two winds first arc length, then cuts the anode (cathode) of bar shaped
Pole piece and the diaphragm other side, thus may make arc anode pole piece, arc cathode pole piece space crossings to fold, and positive pole ear
Be placed in the two sides of arc battery component with negative lug；In addition, forward and reverse winding can pass through the motor of control core
It turns to realize Double-directional rotary；
(4) after the completion of the electric core winding of above-mentioned steps (3), the positive and negative electrode tab is closed weldering, and (closing weldering welding manner can be with
For one of modes such as electric welding, supersonic welding, Laser Welding or several), complete the production of arc battery component.
A kind of arc battery that above-mentioned arc battery component is prepared；The preparation of the arc battery only need to be in above-mentioned arc
After shape battery component completes, routinely subsequent fluid injection, sealing, chemical conversion, test etc. are completed in lithium ion battery process flow
Process.
Embodiment 1:
Based on the design of the shape, structure of the arc battery component in above-mentioned specific embodiment and manufacture craft, if
Centering angle α=90 ° use a cylinder core, circular cross-section R for pole piece coiling0For 20mm, anode is using commercialization
LCO, LCO:NP:SP=96:2:2；Cathode uses artificial graphite, C:CMC:SP:SBR=95:2:1:1；Plus plate current-collecting body aluminium foil
20 microns of thickness, 15 microns of negative current collector copper thickness, 20 microns of the thickness of PE diaphragm.
Coated face density technique requirement: 420 ± 2g/cm of anode2；225 ± 2g/cm of cathode2, positive electrode design compacting
4.0g/cm3, cathode compacting 1.6g/cm3, 121 ± 1 microns of positive plate thickness after roll-in, 158 ± 1 microns of cathode.
Calculate coating tolerance:
δ=two-sided anode thickness+membrane thicknesses+two-sided cathode thickness=(121+158+20)/1000 is about 0.3mm；
The length of folding line trough is uniformly set as 2mm, and the length of tab trough is uniformly set as 6mm, tab width
2mm, as shown in figure 3, applying cloth length is followed successively by (quarter turn is long):
S1=1/2 π R1=1/2 π (R0+ δ)=31.9mm (equal round off processing)；
S2=1/2 π R2=1/2 π (R0+ 2 δ)=32.3mm；
S3=1/2 π R3=1/2 π (R0+ 3 δ)=32.8mm；
S4=1/2 π R4=1/2 π (R0+ 4 δ)=33.3mm；
……
And so on, 10 arc length are amounted to, by the parameter setting of the present embodiment in conjunction with above-mentioned specific embodiment content,
It can be prepared by arc battery component and arc battery of the invention, battery core capacity 700mAh.
Embodiment 2:
Based on the design of the shape, structure of the arc battery component in above-mentioned specific embodiment and manufacture craft, if
Centering angle α=120 ° use a cylinder core, circular cross-section R for pole piece coiling0For 20mm, anode is using commercialization
LCO, LCO:NP:SP=96:2:2；Cathode uses artificial graphite, C:CMC:SP:SBR=95:2:1:1；Plus plate current-collecting body aluminium foil
20 microns of thickness, 15 microns of negative current collector copper thickness, 20 microns of the thickness of PE diaphragm.
Coated face density technique requirement: 420 ± 2g/cm of anode2；225 ± 2g/cm of cathode2, positive electrode design compacting
4.0g/cm3, cathode compacting 1.6g/cm3, 121 ± 1 microns of positive plate thickness after roll-in, 158 ± 1 microns of cathode.
Calculate coating tolerance:
δ=two-sided anode thickness+membrane thicknesses+two-sided cathode thickness=(121+158+20)/1000 is about 0.3mm；
The length of folding line trough is uniformly set as 2mm, and the length of tab trough is uniformly set as 6mm, tab width
2mm, as shown in figure 3, applying cloth length is followed successively by (1/3 circumference):
S1=2/3 π R1=2/3 π (R0+ δ)=42.5mm (equal round off processing)；
S2=2/3 π R2=2/3 π (R0+ 2 δ)=43.1mm；
S3=2/3 π R3=2/3 π (R0+ 3 δ)=43.7mm；
S4=2/3 π R4=2/3 π (R0+ 4 δ)=44.4mm；
……
And so on, 6 arc length are amounted to, by the parameter setting of the present embodiment in conjunction with above-mentioned specific embodiment content,
It can be prepared by arc battery component and arc battery of the invention, battery core capacity 650mAh.
Embodiment 3:
Based on the design of the shape, structure of the arc battery component in above-mentioned specific embodiment and manufacture craft, if
Centering angle α=180 ° use a cylinder core, circular cross-section R for pole piece coiling0For 15mm, anode is using commercialization
LCO, LCO:NP:SP=96:2:2；Cathode uses artificial graphite, C:CMC:SP:SBR=95:2:1:1；Plus plate current-collecting body aluminium foil
20 microns of thickness, 15 microns of negative current collector copper thickness, 20 microns of the thickness of PE diaphragm.
Coated face density technique requirement: 420 ± 2g/cm of anode2；225 ± 2g/cm of cathode2, positive electrode design compacting
4.0g/cm3, cathode compacting 1.6g/cm3, 121 ± 1 microns of positive plate thickness after roll-in, 158 ± 1 microns of cathode.
Calculate coating tolerance:
δ=two-sided anode thickness+membrane thicknesses+two-sided cathode thickness=(121+158+20)/1000 is about 0.3mm；
The length of folding line trough is uniformly set as 2mm, and the length of tab trough is uniformly set as 6mm, tab width
2mm, as shown in figure 3, applying cloth length is followed successively by (1/2 circumference):
S1=π R1=π (R0+ δ)=48.0mm (equal round off processing)；
S2=π R2=2/3 π (R0+ 2 δ)=48.9mm；
S3=π R3=2/3 π (R0+ 3 δ)=49.9mm；
S4=π R4=2/3 π (R0+ 4 δ)=50.9mm；
……
And so on, 8 arc length are amounted to, by the parameter setting of the present embodiment in conjunction with above-mentioned specific embodiment content,
It can be prepared by arc battery component and arc battery of the invention, battery core capacity 1000mAh.
By above embodiments and specific embodiment as it can be seen that according to production method of the invention, can make any radian,
The arc battery of arc length, enriches lithium battery applications environment, and in such a way that successive increases pole coating length, can be with
Effectively make up arc battery core ectonexine difference in length.
Claims (8)
1. a kind of arc battery component, the arc battery component is mainly overlapped mutually by multiple arcs pole piece component, often
A arc-shaped pole piece component is the arc anode pole piece (1), arc electric core membrane (2) and arc cathode pole piece by being sequentially overlapped
(3) it forms, one end of the arc battery component is welded with positive pole ear (4), and the other end of the arc battery component is welded with negative
Pole tab (5), which is characterized in that arc anode pole piece (1) in each layer arc battery component successively end to end formation serpentine
Anode pole piece, arc cathode pole piece (3) in each layer arc battery component successively end to end formation serpentine cathode pole piece, respectively
Arc electric core membrane (2) successively end to end formation serpentine electric core membrane in layer arc battery component；
Wherein, the length of each arc-shaped pole piece component is gradually increased by rule from inside to outside in the arc battery component, composition
The length of each arc anode pole piece (1) of the serpentine anode pole piece is gradually increased by rule from inside to outside, described in composition
The length of each arc cathode pole piece (3) of serpentine cathode pole piece is gradually increased by rule from inside to outside, forms the serpentine
The length of each arc electric core membrane (2) of electric core membrane is gradually increased by rule from inside to outside；
There are the folding line trough of transition or tabs between the two neighboring arc anode pole piece (1) of the serpentine anode pole piece
Trough；There are the folding line trough of transition or poles between the two neighboring arc cathode pole piece (3) of the serpentine cathode pole piece
Ear trough.
2. arc battery component according to claim 1, it is characterised in that: the multiple arc-shaped pole piece component is continuously to roll up
It is bent around same cylinder or semicolumn core.
3. arc battery component according to claim 2, it is characterised in that: the inside cambered surface of the arc battery component around
The central angle alpha that the shaft of the core is formed is 0 ° < α < 360 °, and the radius distance R of the inside cambered surface and aforementioned rotation axis≤
50mm；The positive electrode coated on the arc anode pole piece (1) includes cobalt acid lithium, nickle cobalt lithium manganate, LiFePO4, nickel cobalt aluminium
One of sour lithium；The negative electrode material coated on the arc cathode pole piece (3) includes artificial graphite, natural graphite, interphase
One of carbosphere, hard carbon, graphene, lithium titanate.
4. a kind of production method of the arc battery component as described in any one of claim 1-3, step include:
(1) it is coated with battery positive and negative electrode pole piece, reserves folding line trough and tab trough；
(2) enter tab welding after above-mentioned pole piece drying, weld positive and negative electrode tab in the reserved tab trough；
(3) the positive and negative electrode pole piece after above-mentioned steps (2) is wound into the first arc length on a cylinder or semicolumn core, with one section
Only needle is fixed on close to the folding line trough after the first arc length, continues inversely to wind the second arc length along the core, then will cut-off
Needle is fixed on the tab trough close to the second arc length tail portion；
The above operation for continuing to repeat this step, be sequentially completed third arc length ..., the winding of 2n arc length, n be more than or equal to
1 positive integer, until reaching the electric core winding number of plies requirement of technique initialization；
(4) after the completion of the electric core winding of above-mentioned steps (3), the positive and negative electrode tab is closed and is welded, complete the system of arc battery component
Make.
5. production method according to claim 4, it is characterised in that: in the step (1), the positive and negative electrode pole piece
Coating is all made of compartment coating method, and the compartment coating method of the anode pole piece refers in a continuous plus plate current-collecting body
On with " S1-D1-S2-D2 -……-Sn-1-D n-1-S n-D n" mode be coated with, and n is positive even numbers more than or equal to 2；It is described negative
The compartment coating method of pole pole piece refers on a continuous negative current collector with " S1-D1-S2-D2-……-Sm-1-Dm-1-Sm-
Dm" mode be coated with, and m is positive even numbers more than or equal to 2；Wherein S1、…… SnIndicate positive electrode applying area, S1、……
SmIndicate negative electrode material applying area, D1、D3……Dn-1And D1、D3……Dm-1Indicate folding line trough, D2、D4……DnWith
And D2、D4……DmIndicate tab trough.
6. production method according to claim 5, it is characterised in that: the length of the tab trough is 5-20mm, institute
The length for stating folding line trough is 1-10 mm；Welding manner soldering polar ear is used in the tab trough, the size of tab is
Tab reserves the 1/3~1/2 of section length.
7. production method according to claim 5 or 6, it is characterised in that: the positive electrode applying area S1、…… Sn's
Length is incremented by successively；The negative electrode material applying area S1、…… SmLength it is incremented by successively.
8. it is a kind of as it is of any of claims 1-3 or as described in any one of claim 4-7 production method system
The arc battery that the arc battery component obtained is prepared.
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| CN109818080A (en) * | 2018-12-07 | 2019-05-28 | 力神动力电池系统有限公司 | The hollow type winding-structure of lithium battery electric core |
| CN112290130B (en) * | 2019-06-16 | 2022-08-12 | 深圳格林德能源集团有限公司 | Spherical polymer lithium battery and manufacturing method thereof |
| CN113078286B (en) * | 2021-03-26 | 2022-10-25 | 宁德新能源科技有限公司 | Battery cell, battery using battery cell and power utilization device |
| CN113410524B (en) * | 2021-05-31 | 2023-06-16 | 惠州市恒泰科技股份有限公司 | Arc lamination lithium battery and lamination method thereof |
| CN113823825A (en) * | 2021-08-29 | 2021-12-21 | 西北工业大学 | Battery cell, manufacturing method thereof, arc-shaped battery and battery module |
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