CN109546077A - Electrode plates and preparation method thereof, lithium ion battery - Google Patents
Electrode plates and preparation method thereof, lithium ion battery Download PDFInfo
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- CN109546077A CN109546077A CN201811600980.3A CN201811600980A CN109546077A CN 109546077 A CN109546077 A CN 109546077A CN 201811600980 A CN201811600980 A CN 201811600980A CN 109546077 A CN109546077 A CN 109546077A
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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
- H01M4/043—Processes of manufacture in general involving compressing or compaction
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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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- 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
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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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- General Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention proposes electrode plates and preparation method thereof, lithium ion battery.The method of the production electrode plates includes: to be coated with discharge zone and the area Kong Bo in the surface of paillon interval, and expect area and the area Kong Bo interphase distribution along longitudinal direction；Pole volume after being coated with to interval rolls；Pole volume after rolling is cut, and cutting is the long side along electrode plates；Pole volume after cutting is die cut, to obtain the contact conductor of electrode plates, and cross cutting is the short side along electrode plates.Facture proposed by the invention, its coating process uses intermittent coating, the area Kong Bo is formed between the material area of two longitudinal arrangements, so, avoid the contact conductor being die cut out that from deforming, also, it is small to be die cut side accounting, so as to preferably control of burr, and then keep the yields for the electrode plates produced higher.
Description
Technical field
The present invention relates to technical field of lithium-ion battery, specifically, the present invention relates to electrode plates and its production sides
Method, lithium ion battery.
Background technique
With the development of new-energy automobile, lithium ion battery is by largely on the energy storage device of electric car.Therewith
And come be problem be the gauge size of battery, structure design become it is varied.It can be by battery according to the outer packing of battery
It is divided into rectangular cell, soft-package battery and cylindrical battery.Takeup type and two kinds stacked can be divided into according to the structure of internal battery core,
Wherein, the lamination type electric core side of being widely used in housing battery and soft-package battery.
It is intended to large scale, the design of high-aspect-ratio in existing battery design, so lamination process is more suitable this electricity
The production in pond.The production stage of existing battery pole piece mainly have homogenate, be coated with, roll, cutting, being die cut, winding/lamination, assembly,
The processes such as chemical conversion.In cutting process, due to not having lateral clearance between two carving knives, there is no the tearings of pole piece, normally
Production process is not easy jagged；It in die cutting procedure, and there is lateral clearance between two die cutters, be easy to appear foil
Tearing clot formed burr.It cuts in process and does not allow to be also easy to produce burr, so that burr is easy to control, and hold in die cutting procedure
It is also easy to produce burr, burr is caused to be not easily controlled.The pole piece produced when burr is uncontrolled may be pierced since burr is excessive
Diaphragm is worn, battery short circuit is made.Also, winding process is compared with lamination process, and winding process is predominantly cut, and lamination needs mould
It cuts, so the burr of winding process is easier to control than lamination process.
Therefore, the lamination process of electrode plates at this stage still has much room for improvement.
Summary of the invention
The present invention is the following discovery based on inventor and completes:
The present inventor has found in the course of the research, and with reference to Fig. 1, the existing coating process of electrode plates is used in laminated batteries
Continous way coating, it is first that slurry is coated on paillon 100 to (step S100, figure in do not mark), then rolled (step
S200 is not marked in figure), be finally pole piece is cut to (step S300), the electrode for needing size is made in cross cutting (step S400)
Pole piece 400.Wherein, the roller for rolling step has two rollers up and down, has certain interval between two rollers, after roller, material
Area 200 is rolled into specified thickness.But since the thickness in material area 200 is big more than the thickness of paillon frontside edge, roller compaction process
In, expect that the paillon 100 in area 200 is easy deformation of extending in a longitudinal direction, 100 thickness of paillon in the area Er Kongbo 200 is than upper and lower two
The gap of a roller is small without extending.So the length that will cause material area 100 after rolling in this way is greater than the area Kong Bo 200
Length, is easy to cause the deformation in the area Kong Bo 200, to cause the deformation of contact conductor 420 cut out, finally will lead in electrode
Failure welding can easily occur in welding for lead 420, and then influence the yields of electrode plates 400.
The present inventor proposes a kind of novel coating process by further investigation, that is, uses intermittent coating, empty
Foil area is arranged between the material area of two longitudinal arrangements, in this way, rolling material the longitudinally extending of area later will not influence the area Kong Bo, from
And avoid the deformation of contact conductor being die cut out.Also, what material differentiation was cut out is the long side of electrode plates, and what is be die cut out is electrode
The short side of pole piece, such cross cutting side accounting is small, can preferably control of burr, and then make the yields of electrode plates produced
It is higher, be not easy cause safety problem.
In view of this, an object of the present invention is to provide a kind of burrs of cross cutting more preferably to control, yields is higher
The method for making electrode plates.
In the first aspect of the present invention, the invention proposes a kind of methods for making electrode plates.
According to an embodiment of the invention, the described method includes: be coated with discharge zone and the area Kong Bo in the surface of paillon interval, and
The material area and the area Kong Bo interphase distribution along longitudinal direction；Pole volume after interval coating is rolled；It is rolled to described
Pole volume afterwards is cut, and the cutting is the long side along the electrode plates；Mould is carried out to the pole volume after the cutting
It cuts, to obtain the contact conductor of the electrode plates, and the cross cutting is the short side along the electrode plates.
Inventor has found that the method for the production electrode plates using the embodiment of the present invention, coating process are adopted
With intermittent coating, the area Kong Bo is formed between the material area of two longitudinal arrangements, expects the longitudinally extending of area later in this way, rolling
The area Kong Bo would not be influenced, to avoid the contact conductor being die cut out that from deforming.Also, what material differentiation was cut out is electrode plates
Long side, what is be die cut out is the short side of electrode plates, and such cross cutting side accounting is small, so as to preferably control of burr, and then is made
The yields for the electrode plates produced is higher, is not easy to cause safety issue.
In addition, production method according to the above embodiment of the present invention, can also have the following additional technical features:
According to an embodiment of the invention, the length in the material area is the length of the electrode plates, the width in the material area
It is the integral multiple of the width of the electrode plates.
According to an embodiment of the invention, the width in the material area is twice of the width of the electrode plates.
According to an embodiment of the invention, the minimum unit width of the interval coating is the width of the electrode plates.
According to an embodiment of the invention, the edge in the material area is not less than to the lateral distance between the edge of the paillon
3mm。
According to an embodiment of the invention, the quadrangle of the electrode plates after the cross cutting is all the circular arc of evagination.
In the second aspect of the present invention, the invention proposes a kind of electrode plates.
According to an embodiment of the invention, what the electrode plates were made by above-mentioned method.
Inventor has found that the electrode plates of the embodiment of the present invention, the burr being die cut out more preferably controlled, electrode
Lead will not deform and yields is higher, so that the failure welding when welding to contact conductor is less, reduce electrode pole
The burr of piece punctures the probability of diaphragm, and then keeps the longer life expectancy of lithium ion battery, security performance more preferable.Those skilled in the art
, it is understood that the electrode plates are still applied to above for feature and advantage described in the method for making electrode plates,
Details are not described herein.
In addition, electrode plates according to the above embodiment of the present invention, can also have the following additional technical features:
According to an embodiment of the invention, the quadrangle of the electrode plates is all the circular arc of evagination.
According to an embodiment of the invention, the contact conductor of the electrode plates is arranged in the short side of the electrode plates
Between position, or the two sides position of the short side of the electrode plates is set.
In the third aspect of the present invention, the invention proposes a kind of lithium ion batteries.
According to an embodiment of the invention, the lithium ion battery includes anode pole piece, diaphragm and cathode pole piece, wherein institute
Stating at least one of anode pole piece and the cathode pole piece is above-mentioned electrode plates.
Inventor has found that the hair of the lithium ion battery of the embodiment of the present invention, anode pole piece or cathode pole piece
Thorn is less, contact conductor is indeformable and yields is higher, to make the lithium ion battery, the service life is longer, security performance more
It is good.It will be appreciated to those of skill in the art that being still applied to the lithium above for feature and advantage described in electrode plates
Ion battery, details are not described herein.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned aspect combination following accompanying drawings of the invention explains the description of embodiment, in which:
Fig. 1 is the flow chart of the manufacture craft of the electrode plates of the prior art；
Fig. 2 is the method flow schematic diagram of the production electrode plates of one embodiment of the invention；
Fig. 3 is the flow chart of the manufacture craft of the electrode plates of one embodiment of the invention；
Fig. 4 is one in the quadrangle of the electrode plates of this prior art partial enlarged view；
Fig. 5 is one in the quadrangle of the electrode plates of one embodiment of the invention partial enlarged view；
Fig. 6 is the setting position view of the contact conductor of the electrode plates of three embodiments of the invention.
Appended drawing reference
100 paillons
200 material areas
300 areas Kong Bo
400 electrode plates
410 contact conductors
420 bed of materials
Specific embodiment
The embodiment of the present invention is described below in detail, those skilled in the art is it will be appreciated that following example is intended for solving
The present invention is released, and is not construed as limitation of the present invention.Unless stated otherwise, it is not expressly recited in embodiment below specific
Technology or conditions, those skilled in the art can according to common technology or conditions in the art or according to product description into
Row.
In one aspect of the invention, the invention proposes a kind of methods for making electrode plates.
According to an embodiment of the invention, with reference to Fig. 2, which includes:
S100: on the surface of paillon, interval is coated with discharge zone and the area Kong Bo.
In this step, with reference to Fig. 3, on the surface of paillon 100, interval is coated with discharge zone 200 and the area Kong Bo 300, and expects area
The interphase distribution along longitudinal direction of the area 200 and Kong Bo 300.
The present inventor has found that the setting of contact conductor 410 is on material 200 edge of area in existing coating process after study
Lateral both sides of the edge, the area subsequent roller compaction process Zhong Liao 200 be easy to happen in the longitudinal direction extend it is elongated, the area Er Kongbo 300 by
In not reaching milling roller so will not extend elongated, such area Kong Bo 300 just will appear length difference with material area 200, lead to sky
Foil area 300 deforms, so that the subsequent pole piece lead being die cut out be made to be easily deformed, and then causes to be easy when welding pole piece lead
Generate failure welding.So the area Kong Bo 300 is formed between the material area 200 of two longitudinal arrangements by inventor, in this way, even if
It is subsequent roll the area Hou Liao 200 and extend along longitudinal direction will not influence the area Kong Bo 200, so as to be effectively prevented from subsequent be die cut out
Contact conductor 410 can deform.
According to an embodiment of the invention, the length in material area 200 can be the length of electrode plates 400, meanwhile, expect area 200
Width can be electrode plates 400 width integral multiple.It should be noted that " length " in material area 200 refers to herein
" width " of size on along longitudinal direction, material area 200 refers to the size on transversely.
The present inventor has found that existing coating process is using the short side of electrode plates as cutting after study
Side, for the long side of electrode plates as cross cutting side, the pole piece cross cutting side accounting produced in this way is big, and the control of burr is caused to be compared
It is difficult.So inventor uses the coating process of clearance-type, the length in the coating area Chu Liao 200 is the length of electrode plates, is applied
The width in the area Bu Chuliao 200 is the integral multiple of the width of electrode plates, in this way, cutting be electrode plates long side, mould
What is cut is the short side of pole piece, and such cross cutting side accounting is small, is easily controlled than existing technique burr.
In some embodiments of the invention, expect that the width in area 200 can be twice of the width of electrode plates 400.This
Invention inventor has found that coating width is twice of electrode plates length in existing coating process, after cutting
The pole volume for becoming single times of pole piece length is die cut production pole piece again, and such technique is not only needed when electrode plates size changes
Adjust coating width, it is also necessary to remake cross cutting tooling.So 200 length of material area that gap is coated with by inventor is arranged
For the length of electrode plates 400, so coating length can just can adjust by adjusting device parameter, so as to adjust the electricity produced
The length of pole pole piece 400, and by adjusting the cutting size of cutting apparatus can coordination electrode pole piece 400 width, thus
Can under conditions of being changed without any equipment and tooling the various sizes of electrode plates of rapid conversion production, thus make adjustment week
Phase is shorter, investment is less.
In other embodiments of the invention, the minimum unit width of interval coating can be the width of electrode plates 400
Degree.The present inventor has found after study, and for the foil 100 of fixed width, the minimum unit width of coating is bigger to foil
Compatibility it is poorer, be more easy to appear a large amount of unusable waste materials；It should be noted that " the minimum unit width of coating " specifically refers to
It is coated with the minimum widith in the area Chu Liao 200, the minimum widith in the area Ji Liao 200 is the width of electrode plates 400.And existing technique
The minimum unit width of middle coating is the minimum unit that the length of electrode plates adds the length of pole piece lead, but is coated in the present invention
It is the width of pole piece, so coating provided by the invention is more preferable and higher to the utilization rate of foil to the compatibility of foil.
According to an embodiment of the invention, the edge in material area 200 is not less than to the lateral distance between the edge of paillon 100
3mm, in this way, guarantee the degree of registration in the material area 200 on 100 two sides of paillon, and, it is also ensured that in subsequent cutting, marginal zone can quilt
Cutting is fallen, without the dimensional accuracy for the electrode plates 400 for influencing whether to cut out.
S200: the pole volume after being coated with to interval rolls.
In this step, the pole volume of step S100 interval coating number is continued to roll, in this way, due to the area Kong Bo 300
It is formed between the material area 200 of two longitudinal arrangements, does not interfere with the area Kong Bo in this way, rolling the area Hou Liao 200 and extending along longitudinal direction
200, it can be deformed so as to be effectively prevented from the subsequent contact conductor 410 being die cut out.
S300: the pole volume after rolling is cut.
In this step, the pole volume after rolling to step S200 is cut, and refers to Fig. 3, and cutting is along electrode pole
The long side of piece 400, in this way, cutting range is bigger, and the burr generated is easier to be controlled, to make the electrode finally produced
The burr of pole piece is less.
S400: the pole volume after cutting is die cut, to obtain the contact conductor of electrode plates.
In this step, the pole volume after step S300 cutting is continued to be die cut, to obtain the electrode of electrode plates 400
Lead 410, and cross cutting is the short side along electrode plates 400.
In some embodiments of the invention, the quadrangle of the electrode plates 400 after cross cutting all can be the circular arc of evagination.This hair
It is bright inventor has found that the high-aspect-ratio of prior art production electrode plates, with reference to (the area Tu4Shi Tu1Zhong Fig. 4
The partial enlarged view of domain A), the processing of quadrangle is the arc of indent, and the area that the pole piece produced in this way is cut away is big, capacitance loss
Greatly, and the chamfer design of indent can make electrode plates chamfering sharp, to easily pierce through diaphragm and generate short circuit, in turn result in
Security risks.So inventor this four angles are designed to be to the circular arc of evagination, with reference to Fig. 5, (Fig. 5 is region B in Fig. 3
Partial enlarged view), the loss of pole-piece area can be reduced, and reduce capacitance loss, and the chamfering that the circular arc of evagination is not sharp,
Also it just can avoid chamfering to pierce through diaphragm and generate short-circuit risks.
According to an embodiment of the invention, in the method for the production electrode plates in addition to above step S100, S200, S300 and
Other than S400, the step of may also include other, specifically such as homogenate, winding or lamination, assembly, those skilled in the art can root
It is correspondingly supplemented and is adjusted according to the specific design of the electrode plates, details are not described herein.
In conclusion according to an embodiment of the invention, being coated with the invention proposes a kind of method for making electrode plates
Technique uses intermittent coating, the area Kong Bo is formed between the material area of two longitudinal arrangements, expects the vertical of area later in this way, rolling
The area Kong Bo would not be influenced to extending, to avoid the contact conductor being die cut out that from deforming.Also, what material differentiation was cut out is electrode
The long side of pole piece, what is be die cut out is the short side of electrode plates, and such cross cutting side accounting is small, so as to preferably control of burr,
And then keep the yields for the electrode plates produced higher.
In another aspect of the invention, the invention proposes a kind of electrode plates.According to an embodiment of the invention, electrode
Pole piece is made by above-mentioned method.
According to an embodiment of the invention, the concrete type of battery pole piece is not particularly limited, specific such as anode pole piece
Or cathode pole piece etc., those skilled in the art can correspondingly be selected according to the specific effect of the electrode plates, herein no longer
It repeats.
According to an embodiment of the invention, the quadrangle of electrode plates can all be the circular arc of evagination, in this way, can reduce with reference to Fig. 5
The loss of pole-piece area, and capacitance loss is reduced, and the chamfering that the circular arc of evagination is not sharp, it also just can avoid chamfering and pierce through
Diaphragm and generate short-circuit risks.
In some embodiments of the invention, with reference to (b) of Fig. 6, the contact conductor of electrode plates may be provided at electrode pole
The middle position of the short side of piece, in this way, the shape for the contact conductor being die cut out is more symmetrical.In other embodiments of the invention
In, with reference to (a) and (c) of Fig. 6, the contact conductor of electrode plates may also be arranged on the two sides position of the short side of electrode plates, such as
This, the contact conductor of anode pole piece may be provided at the left side, and the contact conductor of cathode pole piece may be provided at the right, be conducive to battery core
The convenience of welding.
In conclusion according to an embodiment of the invention, the burr being die cut out is more the invention proposes a kind of electrode plates
Good control, contact conductor will not deform and yields is higher, so that the failure welding when welding to contact conductor is less,
The burr for reducing electrode plates punctures the probability of diaphragm, and then keeps the longer life expectancy of lithium ion battery, security performance more preferable.Ability
Field technique personnel are still applied to, it is understood that above for feature and advantage described in the method for making electrode plates
The electrode plates, details are not described herein.
In another aspect of the invention, the invention proposes a kind of lithium ion batteries.
According to an embodiment of the invention, lithium ion battery includes anode pole piece, diaphragm and cathode pole piece, wherein positive pole
At least one of piece and cathode pole piece are above-mentioned electrode plates.
According to an embodiment of the invention, the concrete type of lithium ion battery is not particularly limited, specific such as liquid lithium
Ion battery or polymer Li-ion battery, etc., those skilled in the art are according to the specifically used requirement of the lithium ion battery
It is correspondingly selected with practical service environment.It should be noted that the lithium ion battery is in addition to anode pole piece, diaphragm and cathode
Further include other necessary the Nomenclature Composition and Structure of Complexes other than pole piece, by taking liquid lithium ionic cell as an example, specifically for example electrolyte, shell,
Circuit, etc., those skilled in the art correspondingly can be designed and be supplemented according to the concrete type of the lithium ion battery, herein
It repeats no more.
In conclusion according to an embodiment of the invention, the invention proposes a kind of lithium ion battery, anode pole piece or negative
The burr of pole pole piece is less, contact conductor is indeformable and yields is higher, to make the lithium ion battery, the service life is longer,
Security performance is more preferable.It will be appreciated to those of skill in the art that above for feature and advantage described in electrode plates, still
Suitable for the lithium ion battery, details are not described herein.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of method for making electrode plates characterized by comprising
On the surface of paillon, interval is coated with discharge zone and the area Kong Bo, and the material area and the area Kong Bo interphase distribution along longitudinal direction；
Pole volume after interval coating is rolled；
Pole volume after described roll is cut, and the cutting is the long side along the electrode plates；
Pole volume after the cutting is die cut, to obtain the contact conductor of the electrode plates, and the cross cutting be along
The short side of the electrode plates.
2. the method according to claim 1, wherein the length in the material area is the length of the electrode plates,
The width in the material area is the integral multiple of the width of the electrode plates.
3. according to the method described in claim 2, it is characterized in that, the width in the material area is the width of the electrode plates
Twice.
4. according to the method described in claim 2, it is characterized in that, the minimum unit width of interval coating is the electrode
The width of pole piece.
5. the method according to claim 1, wherein the edge in the material area is between the edge of the paillon
Lateral distance is not less than 3mm.
6. the method according to claim 1, wherein the quadrangle of the electrode plates after the cross cutting is all evagination
Circular arc.
7. a kind of electrode plates, which is characterized in that made by method according to any one of claims 1 to 6.
8. electrode plates according to claim 7, which is characterized in that the quadrangle of the electrode plates is all the circle of evagination
Arc.
9. electrode plates according to claim 7, which is characterized in that the contact conductor of the electrode plates is arranged described
The middle position of the short side of electrode plates, or the two sides position of the short side of the electrode plates is set.
10. a kind of lithium ion battery, which is characterized in that including anode pole piece, diaphragm and cathode pole piece, wherein the anode pole
At least one of piece and the cathode pole piece are electrode plates described in any one of claim 7~9.
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| CN201811600980.3A CN109546077B (en) | 2018-12-26 | 2018-12-26 | Electrode pole piece, manufacturing method thereof and lithium ion battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110911627A (en) * | 2019-10-25 | 2020-03-24 | 合肥国轩高科动力能源有限公司 | Method for forming tab of intermittent coating type battery pole piece |
| CN111761364A (en) * | 2020-06-18 | 2020-10-13 | 合肥国轩高科动力能源有限公司 | Die cutting and welding equipment and method for intermittent coating type pole piece |
| CN112331811A (en) * | 2020-10-30 | 2021-02-05 | 蜂巢能源科技有限公司 | Pole piece processing method and equipment |
| CN114300751A (en) * | 2021-12-15 | 2022-04-08 | 惠州锂威新能源科技有限公司 | Multi-electrode ear lithium ion battery and preparation method thereof |
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| CN110911627B (en) * | 2019-10-25 | 2022-03-11 | 合肥国轩高科动力能源有限公司 | Method for forming tab of intermittent coating type battery pole piece |
| CN111761364A (en) * | 2020-06-18 | 2020-10-13 | 合肥国轩高科动力能源有限公司 | Die cutting and welding equipment and method for intermittent coating type pole piece |
| CN112331811A (en) * | 2020-10-30 | 2021-02-05 | 蜂巢能源科技有限公司 | Pole piece processing method and equipment |
| CN114300751A (en) * | 2021-12-15 | 2022-04-08 | 惠州锂威新能源科技有限公司 | Multi-electrode ear lithium ion battery and preparation method thereof |
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