CN107039685A - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
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- CN107039685A CN107039685A CN201610081407.0A CN201610081407A CN107039685A CN 107039685 A CN107039685 A CN 107039685A CN 201610081407 A CN201610081407 A CN 201610081407A CN 107039685 A CN107039685 A CN 107039685A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—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
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
-
- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of lithium ion battery, including the battery core formed by positive plate, negative plate and membrane winding；The winding initiating terminal and winding end of positive plate are coated with the positive plate insulating tape with heat endurance；The winding initiating terminal and winding end of negative plate are coated with the negative plate insulating tape with heat endurance；Positive plate includes plus plate current-collecting body and positive-active layer；The edge of the side of positive-active layer is completely covered with the edge of the side of plus plate current-collecting body to align, and the edge of opposite side positive-active layer on the other side is not completely covered with the edge of plus plate current-collecting body to align；Negative plate includes negative current collector and the negative electrode active being coated on negative current collector layer；The edge of the side of negative electrode active layer is completely covered with the edge of the side of negative current collector to align, and the edge of opposite side negative electrode active layer on the other side is not completely covered with the edge of negative current collector to align.This lithium ion battery has high safety, low internal resistance, powerful advantage.
Description
Technical field
The present invention relates to energy storage device field, more particularly to a kind of lithium ion battery.
Background technology
Lithium ion battery has specific energy high, and voltage platform is high, has extended cycle life, memory-less effect and to ring
Endanger the outstanding feature such as small and be widely used in border.As green energy resource environmental protection, energy storage are utilized
The demand of aspect increasingly suddenly increases, and lithium ion battery turns into the bottleneck for solving new energy development.
Process currently used for extensive manufacture lithium ion battery mainly includes following process：Prepare electrode slurry,
Coating and dry, film-making, pole piece baking, positive/negative plate and barrier film combine volume around or lamination assembling into battery core,
Battery core toasts fluid injection, chemical conversion and partial volume.Involved pole piece roll-in, cuts and slitting wherein in film-making process
Inevitably occur burr in step and bring serious cell safety hidden danger, although some volumes can be taken
Outer means such as carry out burr monitoring and cleaning dust method attempts to solve these problems, but can not be complete
It totally disappeared except cutting that barrier film that the burr remained after pole piece and slitting and hard intensity activity composition granule bring is pierced to lead
The battery core internal short-circuit problem of cause.Especially in manufacture high-capacity dynamical and energy-storage battery, with single battery core
Capacity be significantly increased, the girth of positive/negative plate piercing edge is obviously prolonged, and result in film-making and assembling process
The middle chance aggravation for burr and dry linting occur, triggers the chance of internal short-circuit of battery to rise at double, product is qualified
Rate is low, easily because internal short-circuit causes on fire or even blast in cell operations, therefore to used in it
The potential safety hazard that surrounding environment is caused is very big.Meanwhile, domestic cylindrical lithium ion battery uses monopole ear mostly
Or the method for Double-pole lug carrys out extracted current, cause the internal resistance of battery excessive, high current charge-discharge ability is poor,
Easily cause high temperature in the charge and discharge process of high current and cause potential safety hazard.
The content of the invention
Based on this, it is necessary to provide a kind of high safety, low internal resistance, powerful lithium ion battery.
A kind of lithium ion battery, including battery core；The battery core is formed by positive plate, negative plate and membrane winding；
The winding initiating terminal and winding end of the positive plate are coated with the positive plate insulation with heat endurance
Adhesive tape, the positive plate insulating tape include stacking the first basic unit and the first glue-line, first glue-line with
The positive plate is directly contacted；
The winding initiating terminal and winding end of the negative plate are coated with the negative plate insulation with heat endurance
Adhesive tape, the negative plate insulating tape include stacking the second basic unit and the second glue-line, second glue-line with
The negative plate is directly contacted；
The positive plate includes plus plate current-collecting body and the positive-active being coated on plus plate current-collecting body layer；Institute
The edge for stating the side of positive-active layer is completely covered with the edge of the side of the plus plate current-collecting body and alignd, with
Relative opposite side described in the edge of edge and the plus plate current-collecting body of positive-active layer be not completely covered pair
Together, the plus plate current-collecting body with the positive-active layer be not completely covered align side winding after formed
Multiple positive pole ear；
The negative plate includes negative current collector and the negative electrode active being coated on negative current collector layer；Institute
The edge for stating the side of negative electrode active layer is completely covered with the edge of the side of the negative current collector and alignd, with
Relative opposite side described in the edge of edge and the negative current collector of negative electrode active layer be not completely covered pair
Together, the negative current collector with negative pole positive-active layer the side alignd winding is not completely covered after formed
Multiple negative lug.
In one embodiment, winding initiating terminal and winding of the positive plate insulating tape to the positive plate
End forms U-shaped cladding；
Winding initiating terminal and winding end formation U-shaped cladding of the negative plate insulating tape to the negative plate.
In one embodiment, in the positive plate, the positive-active layer aligns with the plus plate current-collecting body
The side leaching of side be covered with the first macromolecule glue-line, the first macromolecule bondline thickness is 1 μm~10 μm；
In the negative plate, the side leaching for the side that the negative electrode active layer aligns with the negative current collector is covered
There is the second macromolecule glue-line, the thickness of the second macromolecule glue-line is 1 μm~10 μm.
In one embodiment, the material of first macromolecule glue in PVDF and PAN at least one
Kind, the material of second macromolecule glue is selected from least one of PVDF and PAN.
In one embodiment, the thickness of the positive plate insulating tape is 10 μm~60 μm, the negative pole
The thickness of piece insulating tape is 10 μm~60 μm.
In one embodiment, the material of first basic unit be selected from polyimides, polysulfones, polyphenylene sulfide and
At least one of polyether-ketone.
In one embodiment, the material of first glue-line is silica gel.
In one embodiment, the material of second basic unit be selected from polyimides, polysulfones, polyphenylene sulfide and
At least one of polyether-ketone.
In one embodiment, the material of second glue-line is silica gel.
In one embodiment, the barrier film is porous ceramics barrier film.
This lithium ion battery, passes through winding initiating terminal and winding end of the positive plate insulating tape to positive plate
Cladding is formed, winding initiating terminal and winding end formation of the negative plate insulating tape to negative plate is coated, just
The step that the least significant end only remained in the manufacturing process of pole piece and negative plate in positive plate and negative plate is cut
Suddenly, the action for cutting slitting is greatly reduced, in addition, anode collection in the positive plate of this lithium ion battery
Body with positive-active layer be not completely covered align side winding after form multiple positive pole ear, negative plate
Middle negative current collector with negative pole positive-active layer the side alignd winding is not completely covered after form many heavy burdens
Pole lug, respectively by multiple positive pole ear and multiple negative lug by being welded with planar metal thin slice collector
Full lug is formed together, full lug directly leads out electric current, improved again so as to reduce lithium ion battery internal resistance
Rate performance.Relative to traditional lithium ion battery, this lithium ion battery has high safety, low internal resistance, height
The advantage of multiplying power.
The positive plate insulating tape of this lithium ion battery is formed to the winding initiating terminal and winding end of positive plate
U-shaped is coated, and negative plate insulating tape is coated to winding initiating terminal and winding end the formation U-shaped of negative plate,
And the coat side leaching perfectly aligned with collector is covered with macromolecule glue in positive plate and negative plate, further
Improve the security of battery.
This lithium ion battery technical process is easy, and production cost is low, is especially suitable for large-scale energy storage and electric car
Etc. application field.
Brief description of the drawings
Fig. 1 is the cross-sectional view after the battery core expansion of the lithium ion battery of an embodiment；
Fig. 2 is the positive structure schematic of the positive plate of battery core as shown in Figure 1；
Fig. 3 is the positive structure schematic of the negative plate of battery core as shown in Figure 1.
Embodiment
Lithium ion battery is described in further detail mainly in combination with drawings and the specific embodiments below.
The lithium ion battery of one embodiment, including battery core and electrolyte.Battery core by positive plate, negative plate and
Membrane winding is formed.
As shown in figure 1, including positive plate 10, barrier film 30, the negative plate 20 stacked gradually after battery core expansion
With barrier film 30.
Positive plate 10 includes plus plate current-collecting body 12 and the positive-active being coated on plus plate current-collecting body 12 layer 14.
In present embodiment, positive-active layer 14 is bilayer, is covered each by two tables of plus plate current-collecting body 12
Face.
Plus plate current-collecting body 12 can select conventional collector, and the thickness of plus plate current-collecting body 12 is 5 μm~45 μm.
It is preferred that, plus plate current-collecting body 12 is carbon coated aluminum foil.
The material of positive-active layer 14 includes positive electrode active materials, positive conductive additive and positive pole bonding agent.
In positive-active layer 14, the mass ratio of positive electrode active materials, positive conductive additive and positive pole bonding agent is
85~98：1~10：1~15.
The thickness of positive-active layer is 10 μm~45 μm.
Positive electrode active materials are selected from cobalt acid lithium, LiMn2O4, nickel-cobalt-manganese ternary material, LiFePO4 and nickel cobalt aluminium
At least one of.
Positive conductive additive is selected from electrically conductive graphite, KS6 (electrically conductive graphite), CNT, VGCF (gas phases
Grown carbon fiber), at least one of graphene and Super-P (super conductive black).
Positive pole bonding agent can be deionized water or the bonding agent for dissolving in the third ketones solvent.It is preferred that, positive pole
Bonding agent is selected from polyvinylidene fluoride copolymer PVDF-HFP (copolymer of vinylidene and hexafluoropropene), poly- third
At least one of alkene fine (PAN), polyethylene terephthalate and polyethylene glycol oxide.
With reference to Fig. 2, the winding initiating terminal and winding end of positive plate 10 are coated with heat endurance just
Pole piece insulating tape 16.
Positive plate insulating tape 16 should be guaranteed that heat endurance more than 200 DEG C.
Positive plate insulating tape 16 includes the first basic unit and the first glue-line of stacking, the first glue-line and positive plate 10
Directly contact.
The thickness of positive plate insulating tape 16 is 10 μm~60 μm.The material of first basic unit be selected from polyimides,
At least one of polysulfones, polyphenylene sulfide and polyether-ketone.The material of first glue-line is silica gel.
In present embodiment, winding initiating terminal and winding end of the positive plate insulating tape 16 to positive plate 10
Form U-shaped cladding.
Fig. 1 is returned to, the edge at the edge and the side of plus plate current-collecting body 12 of the side of positive-active layer 14 is complete
Covering alignment, the edge of opposite side positive-active layer 14 on the other side and the edge of plus plate current-collecting body 12 are not
It is completely covered alignment, plus plate current-collecting body 12 is rolled up with the side alignd that is not completely covered of positive-active layer 14
Multiple positive pole ear is formed around rear.
In positive plate 10, the side of side that positive-active layer 14 aligns with plus plate current-collecting body 12, which soaks, is covered with the
One macromolecule glue-line 18.
The thickness of first macromolecule glue 18 is 1 μm~10 μm.The material of first macromolecule glue 18 is selected from PVDF
At least one of (Kynoar) and PAN (polyacrylonitrile).
As shown in figure 1, negative plate 20 includes negative current collector 22 and is coated on negative current collector 22
Negative electrode active layer 24.
In present embodiment, negative electrode active layer 24 is bilayer, is covered each by two tables of negative current collector 22
Face.
Negative current collector 22 can select conventional collector, and the thickness of negative current collector 22 is 5 μm~45 μm.
It is preferred that, negative current collector 22 is to cover carbon copper foil.
The material of negative electrode active layer 24 includes negative active core-shell material, negative conductive additive and negative pole bonding agent.
In negative electrode active layer 24, the mass ratio of negative active core-shell material, negative conductive additive and negative pole bonding agent is
85~98：1~5：1~5.
The thickness of negative electrode active layer is 5 μm~25 μm.
Negative active core-shell material is selected from least one of lithium titanate, carbonaceous mesophase spherules and Delanium.
Negative conductive additive is selected from electrically conductive graphite, KS6, CNT, VGCF, graphene and Super-P
At least one of.
Negative pole bonding agent can be deionized water or the bonding agent for dissolving in the third ketones solvent.It is preferred that, negative pole
Bonding agent is selected from polyvinylidene fluoride copolymer PVDF-HFP (copolymer of vinylidene and hexafluoropropene), poly- third
At least one of alkene fine (PAN), polyethylene terephthalate and polyethylene glycol oxide.
With reference to Fig. 3, the winding initiating terminal and winding end of negative plate 20 are coated with bearing with heat endurance
Pole piece insulating tape 26.
Negative plate insulating tape 26 should be guaranteed that heat endurance more than 200 DEG C.
Negative plate insulating tape 26 includes the second basic unit and the second glue-line of stacking, the second glue-line and negative plate 20
Directly contact.
The thickness of negative plate insulating tape 26 is 10 μm~60 μm.The material of second basic unit be selected from polyimides,
At least one of polysulfones, polyphenylene sulfide and polyether-ketone.The material of second glue-line is silica gel.
In present embodiment, winding initiating terminal and winding end of the negative plate insulating tape 26 to negative plate 20
Form U-shaped cladding.
Fig. 1 is returned to, the edge at the edge and the side of negative current collector 22 of the side of negative electrode active layer 24 is complete
Covering alignment, the edge of opposite side negative electrode active layer 24 on the other side and the edge of negative current collector 22 are not
It is completely covered alignment, negative current collector 22 with negative pole positive-active layer 24 align one is not completely covered
Multiple negative lug is formed after the winding of side.
In negative plate 20, the side of side that negative electrode active layer 24 aligns with negative current collector 22, which soaks, is covered with the
Two macromolecule glue-lines 28.
The thickness of second macromolecule glue-line 28 is 1 μm~10 μm.The material of second macromolecule glue-line 28 is selected from
At least one of PVDF (Kynoar) and PAN (polyacrylonitrile).
Barrier film 30 can be made with porous ceramics barrier film by gravure coating process.The thickness of barrier film 30 is
10 μm~45 μm.Specifically, barrier film 30 can be 10 μm, 25 μm or 45 μm.
The solute of electrolyte is the lithium salts of low viscosity low melting point, and the solvent of electrolyte is the molten of low viscosity low melting point
Agent, specifically, the solvent of electrolyte includes carbonic ester and esters.
The concentration of lithium salts is 0.7M~2M, and lithium salts is selected from LiPF6、LiBF4, LiBOB and LiBC2O4F2In
At least one.
Carbonic ester be selected from ethylene carbonate (EC), propene carbonate (PC), dimethyl carbonate (DMC),
At least one of diethyl carbonate (DEC), methyl ethyl carbonate (EMC) and methyl propyl carbonate (MPC).
Esters be selected from gamma-butyrolacton (BL), methyl formate (MF), Ethyl formate (EF), methyl acetate (MA),
In ethyl acetate (EA), ethyl propionate (EP), methyl butyrate (MB) and ethyl butyrate (EB) at least
It is a kind of.
This lithium ion battery can be made by the following method, by positive plate 10, barrier film 20, negative plate 30
Form battery core through winding after being laminated with barrier film 20, plus plate current-collecting body 12 it is incomplete with positive-active layer 14
Form multiple positive pole ear after the side winding of covering alignment, negative current collector 22 with negative pole positive-active layer
24 the side of alignment winding is not completely covered after form multiple negative lug, respectively by multiple positive pole ear and
Multiple negative lug by being welded together to form full lug with planar metal thin slice collector, battery core through entering shell,
24h~120h is toasted at 60 DEG C~85 DEG C under vacuum, electrolyte is injected, is melted into, is sealed, after partial volume
Obtain lithium ion battery.
This lithium ion battery is only remained in positive plate in the manufacturing process of positive plate 10 and negative plate 20
10 and the least significant end of negative plate 20 the step of cut, greatly reduce the action for cutting slitting.
This lithium ion battery, passes through winding initiating terminal and volume of the positive plate insulating tape 16 to positive plate 10
Formed and coated around end, winding initiating terminal and winding end shape of the negative plate insulating tape 26 to negative plate 20
Into cladding, it is to avoid the burr remained on the positive plate 10 and negative plate 20 after cutting, which wears out barrier film 30, to be caused
Inside lithium ion cell short circuit.
Needed after the coiling pair in positive plate 10, negative plate 20, barrier film 30 in addition, this lithium ion battery is removed
The end of positive plate 10 and negative plate 20 has to be cut on a small quantity, without it is other cut with slitting step, therefore can be with
Greatly reduce the generation of the hard intensity activity material grainses dry linting of positive plate 10, negative plate 20 and burr.
Meanwhile, the plus plate current-collecting body 12 of this lithium ion battery is not completely covered with positive-active layer 14
Form multiple positive pole ear after the side winding of alignment, negative current collector 22 with negative pole positive-active layer 24
Be not completely covered the side of alignment winding after form multiple negative lug, lithium ion battery can be reduced
Internal resistance improves high current charge-discharge ability, security and the cycle life of this lithium ion battery, is adapted to large-scale
The application field such as energy storage and electric car.
It is specific embodiment below.
Embodiment 1
The preparation of 30Ah cylindrical type LFP-C battery cores.
The making of positive plate：By 93g nano-scale lithium iron phosphate, 2.5g CNT, 1.5g Super-P
It is dissolved in 3g PVDF in 45mL 1-METHYLPYRROLIDONE and makes anode sizing agent, with covers for 20 μ m-thicks
Carbon aluminium foil on plus plate current-collecting body and dries anode sizing agent according to Fig. 2 dual coatings as plus plate current-collecting body
Positive-active layer is formed, after roll-in, by positive-active layer and the plus plate current-collecting body pair of the positive plate of positive plate
The side of neat side is shallow to be immersed in PVDF, is taken out and is aligned after drying according to Fig. 1 with positive plate insulating tape
The winding initiating terminal and winding end of pole piece carry out U-shaped cladding, obtain positive plate.PVDF is molecular weight 100
More than ten thousand Kynoar high polymer.
The making of negative plate：By the binding agent (mass ratio of 103g graphite, 1.5g Super-P and 3.5g
For 1：1 sodium carboxymethylcellulose and the mixture of butadiene-styrene rubber) it is dissolved in deionized water and makes cathode size,
Carbon copper foil is covered as collector using 12 μ m-thicks, and cathode size is pressed into Fig. 3 dual coatings on negative current collector
And drying forms negative electrode active layer, after roll-in, the negative electrode active layer of negative plate is alignd with negative current collector
Side side it is shallow be immersed in PVDF, take out dry after according to Fig. 1 with negative plate insulating tape to negative pole
The winding initiating terminal and winding end of piece carry out U-shaped cladding, obtain negative plate.
The preparation of electrolyte：Compound concentration is 1.35M LiPF6Organic solution, solvent is that weight ratio is
5:8:1:2 EC:EMC:PC:DEC.
The making of battery core：Positive plate, barrier film (porous ceramics barrier film, thickness be 25 μm), negative plate and every
Form battery core through winding after film (porous ceramics barrier film, thickness be 25 μm) stacking, plus plate current-collecting body with just
Pole active layer the side of alignment winding is not completely covered after form multiple positive pole ear, negative current collector with
Not being completely covered after the side of alignment is wound for negative pole positive-active layer forms multiple negative lug, will be many respectively
Weight positive pole ear and multiple negative lug with planar metal thin slice collector by being welded together to form full pole
Ear, battery core toasts 24h at 85 DEG C under vacuum through entering shell, injects electrolyte, is melted into, sealing,
Cylindrical type LFP-C batteries are obtained after partial volume.
Chemical property and cycle performance test, knot are carried out to cylindrical type LFP-C batteries made from embodiment 1
Fruit shows the battery, and when (4C fill/4C put) under the conditions of high rate charge-discharge it is recycled to 5000 times, capacity is also
Maintain 86%.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, can also make it is some deformation and
Improve, these belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is defined.
Claims (10)
1. a kind of lithium ion battery, it is characterised in that including battery core；The battery core is by positive plate, negative plate
Formed with membrane winding；
The winding initiating terminal and winding end of the positive plate are coated with the positive plate insulation with heat endurance
Adhesive tape, the positive plate insulating tape include stacking the first basic unit and the first glue-line, first glue-line with
The positive plate is directly contacted；
The winding initiating terminal and winding end of the negative plate are coated with the negative plate insulation with heat endurance
Adhesive tape, the negative plate insulating tape include stacking the second basic unit and the second glue-line, second glue-line with
The negative plate is directly contacted；
The positive plate includes plus plate current-collecting body and the positive-active being coated on plus plate current-collecting body layer；Institute
The edge for stating the side of positive-active layer is completely covered with the edge of the side of the plus plate current-collecting body and alignd, with
Relative opposite side described in the edge of edge and the plus plate current-collecting body of positive-active layer be not completely covered pair
Together, the plus plate current-collecting body with the positive-active layer be not completely covered align side winding after formed
Multiple positive pole ear；
The negative plate includes negative current collector and the negative electrode active being coated on negative current collector layer；Institute
The edge for stating the side of negative electrode active layer is completely covered with the edge of the side of the negative current collector and alignd, with
Relative opposite side described in the edge of edge and the negative current collector of negative electrode active layer be not completely covered pair
Together, the negative current collector with negative pole positive-active layer the side alignd winding is not completely covered after formed
Multiple negative lug.
2. lithium ion battery according to claim 1, it is characterised in that the positive plate insulating tape
To winding initiating terminal and winding end the formation U-shaped cladding of the positive plate；
Winding initiating terminal and winding end formation U-shaped cladding of the negative plate insulating tape to the negative plate.
3. lithium ion battery according to claim 1, it is characterised in that described in the positive plate
The side leaching for the side that positive-active layer aligns with the plus plate current-collecting body is covered with the first macromolecule glue-line, described
First macromolecule bondline thickness is 1 μm~10 μm；
In the negative plate, the side leaching for the side that the negative electrode active layer aligns with the negative current collector is covered
There is the second macromolecule glue-line, the thickness of the second macromolecule glue-line is 1 μm~10 μm.
4. lithium ion battery according to claim 3, it is characterised in that first macromolecule glue
Material is selected from least one of PVDF and PAN, the material of second macromolecule glue be selected from PVDF and
At least one of PAN.
5. lithium ion battery according to claim 1, it is characterised in that the positive plate insulating tape
Thickness be 10 μm~60 μm, the thickness of the negative plate insulating tape is 10 μm~60 μm.
6. lithium ion battery according to claim 1, it is characterised in that the material of first basic unit
Selected from least one of polyimides, polysulfones, polyphenylene sulfide and polyether-ketone.
7. lithium ion battery according to claim 1, it is characterised in that the material of first glue-line
For silica gel.
8. lithium ion battery according to claim 1, it is characterised in that the material of second basic unit
Selected from least one of polyimides, polysulfones, polyphenylene sulfide and polyether-ketone.
9. lithium ion battery according to claim 1, it is characterised in that the material of second glue-line
For silica gel.
10. lithium ion battery according to claim 1, it is characterised in that the barrier film is porous pottery
Porcelain barrier film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081407.0A CN107039685A (en) | 2016-02-04 | 2016-02-04 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081407.0A CN107039685A (en) | 2016-02-04 | 2016-02-04 | Lithium ion battery |
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| CN107039685A true CN107039685A (en) | 2017-08-11 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019169557A1 (en) * | 2018-03-06 | 2019-09-12 | 深圳前海优容科技有限公司 | Cell and manufacturing method therefor, battery, and electronic device |
| CN110739437A (en) * | 2019-11-05 | 2020-01-31 | 珈伟隆能固态储能科技如皋有限公司 | high-magnification and safe cylindrical lithium ion battery and manufacturing method thereof |
| CN111200099A (en) * | 2020-03-11 | 2020-05-26 | 湖南立方新能源科技有限责任公司 | Novel laminated battery and laminating method and preparation method thereof |
| CN111341993A (en) * | 2018-12-18 | 2020-06-26 | 宁德新能源科技有限公司 | Battery core and battery thereof |
| CN112635922A (en) * | 2020-12-16 | 2021-04-09 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN113659184A (en) * | 2020-04-29 | 2021-11-16 | 北京小米移动软件有限公司 | Winding type battery cell, battery and electronic equipment |
| CN116581396A (en) * | 2023-07-10 | 2023-08-11 | 宁德新能源科技有限公司 | Battery core and electric equipment |
| WO2023201588A1 (en) * | 2022-04-20 | 2023-10-26 | 宁德新能源科技有限公司 | Electrochemical apparatus and electrical device |
| WO2024007148A1 (en) * | 2022-07-05 | 2024-01-11 | 宁德时代新能源科技股份有限公司 | Compound electrode sheet, electrode assembly, secondary battery and electric apparatus |
| WO2024011878A1 (en) * | 2022-07-15 | 2024-01-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electrical device |
-
2016
- 2016-02-04 CN CN201610081407.0A patent/CN107039685A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019169557A1 (en) * | 2018-03-06 | 2019-09-12 | 深圳前海优容科技有限公司 | Cell and manufacturing method therefor, battery, and electronic device |
| CN111341993A (en) * | 2018-12-18 | 2020-06-26 | 宁德新能源科技有限公司 | Battery core and battery thereof |
| CN111341993B (en) * | 2018-12-18 | 2024-04-26 | 宁德新能源科技有限公司 | Battery cell and battery thereof |
| CN110739437A (en) * | 2019-11-05 | 2020-01-31 | 珈伟隆能固态储能科技如皋有限公司 | high-magnification and safe cylindrical lithium ion battery and manufacturing method thereof |
| CN111200099A (en) * | 2020-03-11 | 2020-05-26 | 湖南立方新能源科技有限责任公司 | Novel laminated battery and laminating method and preparation method thereof |
| CN113659184B (en) * | 2020-04-29 | 2023-07-14 | 北京小米移动软件有限公司 | Winding type battery cell, battery and electronic equipment |
| CN113659184A (en) * | 2020-04-29 | 2021-11-16 | 北京小米移动软件有限公司 | Winding type battery cell, battery and electronic equipment |
| CN112635922B (en) * | 2020-12-16 | 2022-03-08 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN112635922A (en) * | 2020-12-16 | 2021-04-09 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| WO2023201588A1 (en) * | 2022-04-20 | 2023-10-26 | 宁德新能源科技有限公司 | Electrochemical apparatus and electrical device |
| WO2024007148A1 (en) * | 2022-07-05 | 2024-01-11 | 宁德时代新能源科技股份有限公司 | Compound electrode sheet, electrode assembly, secondary battery and electric apparatus |
| WO2024011878A1 (en) * | 2022-07-15 | 2024-01-18 | 宁德时代新能源科技股份有限公司 | Electrode assembly, battery cell, battery and electrical device |
| CN116581396A (en) * | 2023-07-10 | 2023-08-11 | 宁德新能源科技有限公司 | Battery core and electric equipment |
| CN116581396B (en) * | 2023-07-10 | 2024-04-05 | 宁德新能源科技有限公司 | Battery core and electric equipment |
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