CN208781948U - A kind of secondary cell by two kinds of micropore collector combined applications - Google Patents
A kind of secondary cell by two kinds of micropore collector combined applications Download PDFInfo
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- CN208781948U CN208781948U CN201821082565.9U CN201821082565U CN208781948U CN 208781948 U CN208781948 U CN 208781948U CN 201821082565 U CN201821082565 U CN 201821082565U CN 208781948 U CN208781948 U CN 208781948U
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- micropore
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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
The utility model provides a kind of secondary cell by two kinds of micropore collector combined applications, include anode sizing agent, negative electrode slurry, positive collector electrode is equipped in the anode sizing agent, negative collector electrode is equipped in the negative electrode slurry, the positive collector electrode or negative collector electrode are equipped with high density, micron-sized micropore.Be conducive to improve caking property of the battery plus-negative plate slurry on micropore foil surface, reduce foil weight, improve battery energy density, reduce internal resistance, improve the charge-discharge magnification of battery, cell electrolyte injection and moisture drying efficiency are improved, production energy consumption is reduced, greatly improves battery consistency and cycle life.
Description
Technical field
The utility model relates to may be repeated the secondary cell manufacturing field of charge and discharge, and in particular to a kind of micro- by two kinds
The secondary cell of hole collector combined application.
Background technique
The positive and negative anodes foil of secondary cell currently used in the market is substantially and rolls mode using large-tonnage roll-in,
Or produced by way of electrolysis, belong to the non-porous foil material of plane；And this non-porous foil material of plane, prior art meeting
Battery plus-negative plate slurry is coated directly on the surface of foil material, then passes through drying, roll-in, slitting, film-making, winding or folded
The techniques such as piece, welding assembly, filling electrolyte, forming and capacity dividing, produce secondary cell finished product；
The existing non-porous foil of plane, there is also following problems during being applied to secondary cell:
1, the non-porous foil material of this plane, surface smoother, when slurry is made in battery plus-negative plate material, in order in copper aluminium
Foil material surface forms certain cohesive force, needs to mix a certain proportion of binder of addition, because this binder material can account for
Go the certain proportion of cell size that can have a certain impact generally in 3% range to battery energy density；And pass through thisization
The mode of bonding is learned also to be easy to produce shedding after coating up or drop off phenomenon；
2, the non-porous foil material of this plane, when implementing the technique of two sides slurry coating, tow sides are bound to exist and apply
The deviation of clad can density, influences battery with two side terminals；
3, the non-porous foil material of this plane, surface is strong seamless non-porous, when filling electrolyte or drying moisture, electricity
Solution liquid and moisture can only slowly be permeated, electrolyte injection efficiency along two planes of material by minim gap between layers
It is extremely low with moisture drying efficiency, it also affects electrolyte infiltration consistency and moisture drying is not thorough and causes to remain,
Seriously affect the service life cycle of battery.
Utility model content
The utility model provides a kind of secondary cell by two kinds of micropore collector combined applications, i.e., with high density,
Micron order is two-way through jagged and two kinds of micropore foils of impulse- free robustness, positive collector electrode and cathode current collection respectively as battery
Pole, combined application on the secondary battery, are conducive to improve caking property of the battery plus-negative plate slurry on micropore foil surface, reduce
Foil weight improves battery energy density, reduces internal resistance, improves the charge-discharge magnification of battery, improve cell electrolyte injection and
Moisture drying efficiency reduces production energy consumption, greatly improves battery consistency and cycle life.
In order to reach above-mentioned application purpose, following technical scheme provided by the utility model:
A kind of secondary cell by two kinds of micropore collector combined applications includes anode sizing agent, negative electrode slurry, positive pole current collections
Pole, negative collector electrode, isolation film, battery packages shell, being designed with pore diameter range in the positive collector electrode and negative collector electrode is
The high density of 0.001mm ~ 0.2mm, micron order micropore are provided with the burr of convex on the micropore of the positive collector electrode, are
Jagged micropore；It is not provided with convex burr on the micropore of the negative collector electrode, is impulse- free robustness micropore；The positive collector electrode
Two sides be coated with anode sizing agent, the two sides of the negative collector electrode is coated with negative electrode slurry.
Further technical solution, with the burr of convex on the micropore of the positive collector electrode.It is this jagged
Micropore foil, relatively for the plane positive collector electrode of equivalent specifications, quality does not change, but specific surface area opposite can increase
Add, and the micropore of negative collector electrode does not have burr, for the non-porous foil of plane of opposite equivalent specifications size, quality is opposite to be subtracted
It is small.
Further technical solution, the burr direction of the micropore be it is two-way set on two faces of foil to wearing, i.e.,
Burr is to raise upward to be arranged alternately with downwardly convex.
The arrangement rule of further technical solution, the micropore is arranged in the positive collector electrode or negative collector electrode
On, 4 micropore lines of arbitrary neighborhood are formed into a quadrangle, the angular range of the Minimum Internal Angle in quadrangle are as follows: 30o
~ 90o, the preferred Minimum Internal Angle angle of the present embodiment are 60o and 90o.
Further technical solution, the center spacing between the micropore are as follows: 0.001mm ~ 0.6mm.The positive pole current collections
Pole or negative collector electrode include but is not limited to: silver, copper, aluminium, tin, nickel, lithium.
Further technical solution, the range of the pore arrangement density are as follows: 1 ~ 20000 hole/mm2。
Further technical solution, the burr height range of the micropore are as follows: 0.01 ~ 0.1mm.Its specific surface area is relatively same
The non-porous foil of the plane of equal-specification size will increase: 0.1% ~ 250%, but opposite quality does not change.
Further technical solution, the negative collector electrode, the porosity ranges of micropore are as follows: 0.1% ~ 90%；It compares table
Area will increase with respect to the non-porous negative collector electrode of equivalent specifications size: 0.1% ~ 250%；Its quality can be reduced: 0.1% ~ 90%；
The shape of further technical solution, the micropore includes but is not limited to: circle, rectangle, cylinder, cone,
The geometry of pyramid and its combination of shapes.The production method of the secondary cell includes but is not limited to use lamination side
Formula and continuous winding method, the type of secondary cell include but is not limited to cylindrical battery, rectangular cell, soft-package battery.
The material of further technical solution, the positive collector electrode and negative collector electrode includes but is not limited to: copper, aluminium,
Lithium, nickel, tin, and manufactured alloy material is combined using its material.
Two kinds of micropore foils (positive collector electrode or negative collector electrode) described in the utility model, can pass through existing laser
Photoetching technique, electrochemical corrosion technology, fusion electrolysis technology are manufactured, and can also refer to number of patent application
" 201710899677.7 " machinery production technology is produced two-way to wearing with high density, micron order on two surface of foil
Jagged and carrot-free two kinds of micropore foil materials；
When the battery plus-negative plate slurry mixed is respectively coated onto two kinds of micropore foil surfaces, anode sizing agent can be filled up
And the burr on jagged micropore foil surface is covered, and negative electrode slurry can be filled up and cover the micro- of impulse- free robustness micropore foil surface
Hole；Due to the specific surface area of two kinds of micropore foils, increased because of different foil thickness, thereby increases positive and negative electrode slurry
Bond area between material and micropore foil；Bonding force between material and micropore foil is improved, when making positive and negative electrode pole piece,
Positive and negative electrode slurry can be properly increased in the coating thickness on micropore foil two sides, to improve positive and negative electrode slurry namely battery
Accounting of the active material in battery, it is opposite to reduce the specific gravity of binder and micropore foil material in the battery, realize battery energy
The promotion of metric density；
According to the characteristic and granularity size cases of different positive and negative electrode materials, in conjunction with two kinds of micropore foils thickness, compare table
Area, porosity, burr height characteristic, comprehensive cost of manufacture are reasonably applied in combination, and make to be coated in micropore foil two sides
Positive and negative electrode slurry: comprising moisture, lithium ion, electrolyte these material compositions can more freely, higher efficiency passes through
Highdensity micron order hole, realize inside battery more rapidly effectively infiltrate and circulate, improve electrolyte injection efficiency and
Moisture drying efficiency reduces production equipment investment and production energy consumption, greatly improves production production capacity；Correspondingly, two kinds of micropore foils
After the specific surface area being in contact between positive and negative electrode slurry is bigger, polarization resistance can be effectively reduced, improve battery charging and discharging times
Rate further improves battery with two side terminals and service life cycle.
Detailed description of the invention
Fig. 1 is a kind of secondary battery construction principal diagram provided by the embodiment of the utility model；
Fig. 2 is a kind of jagged micropore foil structural diagrams provided by the embodiment of the utility model；
Fig. 3 is a kind of impulse- free robustness micropore foil structural diagrams provided by the embodiment of the utility model；
Symbol description: positive collector electrode 501, anode sizing agent 502, lamellar spacing 504, burr 505, micropore 506, isolation film
521, negative collector electrode 511, negative electrode slurry 512, battery case 522.
Specific embodiment
Reference attached drawing 1 ~ 3, the secondary cell production method of the present embodiment:
Firstly, two kinds of micropore foils described in the utility model, can pass through existing Laser lithography, electrochemical corrosion
Technology, fusion electrolysis technology are manufactured, and can also refer to the machinery production skill of number of patent application " 201710899677.7 "
Art method, on two surface of foil, produce with high density, micron order is two-way through jagged and it is carrot-free two kinds it is micro-
Hole foil material；The granularity size and positive collector electrode 501 and cathode of the present embodiment combination present battery positive and negative electrode slurry
The thickness of collector 511, the pore diameter range of preferred microporous 506 are as follows: 0.001mm ~ 0.2mm, the arranging density range of micropore are as follows: 1 ~
20000 holes/mm2；
If Fig. 2 is jagged micropore foil, used in the present embodiment preferably as positive collector electrode 501, it is preferred
Material is aluminum foil material, and highdensity micropore 506 is distributed in positive collector electrode 501, has convex on micropore 506
Burr 505, the unilateral height of projection of burr 505 are 0.01 ~ 0.1mm, the specific surface area of jagged micropore foil, relatively together
The non-porous foil of the plane of equal-specification size increases by 0.1% ~ 250%, but opposite quality does not change；
If Fig. 3 is impulse- free robustness micropore foil, used in the present embodiment preferably as negative collector electrode 511, it is preferred
Material is copper foil material, and highdensity micropore 506 is distributed in negative collector electrode 511, does not have the hair of protrusion on micropore 506
Thorn, the porosity ranges of micropore foil are as follows: 0.1% ~ 90%, plane non-porous foil of the specific surface area with respect to equivalent specifications size
It will increase: 0.1% ~ 250%；The quality of its micropore foil can be reduced with respect to the non-porous foil of plane of equivalent specifications size: 0.1% ~
90%；
According to battery manufacturing technology and process flow, anode powder (such as: LiFePO4, nickel cobalt manganese, nickel cobalt aluminium),
Conductive agent, binder, solvent, anode sizing agent 502 needed for being mixed and made into secondary cell by certain proportion；Battery cathode powder
Expect (such as: silicon-carbon cathode, graphite), conductive agent, binder, solvent, is mixed needed for secondary cell and bears by certain proportion
Pole slurry 512；
By professional coating equipment, the anode sizing agent 502 mixed is uniformly coated on 506 structure of high density micropore
Positive collector electrode 501 on, and fill anode sizing agent 502 and cover burr 505 on micropore 506；It is negative what is mixed again
Pole slurry 512 is uniformly coated in the negative collector electrode 511 with 506 structure of high density micropore, and fills negative electrode slurry 512
Micropore 506 is covered, then passes through the processes such as drying, roll-in, slitting, the positive plate and negative electrode tab of secondary cell is made；Just
Between pole piece and negative electrode tab, setting isolation film 521 carries out positive and negative anodes insulation, then according to one layer of isolation film, 521, one layers of anode
Piece, one layer of isolation film, 521, one layers of negative electrode tab successively mode carry out winding or successively lamination simultaneously, battery core are made, loading
In battery case 522, through fluid injection, encapsulation, chemical conversion, secondary cell this while by two kinds of micropore foil combined applications is made；
According to the characteristic and granularity size cases of different positive and negative electrode materials, in conjunction with two kinds of micropore foils thickness, compare table
Area, porosity, burr height characteristic, comprehensive cost of manufacture are reasonably applied in combination, and make to be coated in micropore foil two sides
Anode sizing agent 502, moisture, lithium ion, electrolyte these ingredients for including in negative electrode slurry 512, in addition to can be in battery layers
The infiltration circulation of 504 position of gap is outer, can be with higher efficiency by being distributed in positive collector electrode 501, negative collector electrode 511
The two-way through micropore 506 of high density, micron order is realized in inside battery more rapidly effective infiltration comprehensively and circulation, is improved
Electrolyte injection efficiency and moisture drying efficiency reduce production equipment investment and production energy consumption, greatly improve production production capacity；Accordingly
, after the specific surface area being in contact between two kinds of micropore foils and positive and negative electrode slurry is bigger, polarization resistance can be effectively reduced, mention
High battery charging and discharging multiplying power further improves battery with two side terminals and service life cycle.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features
It is equivalently replaced；And these are modified or replaceed, the utility model embodiment that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (5)
1. a kind of secondary cell by two kinds of micropore collector combined applications includes anode sizing agent, negative electrode slurry, positive pole current collections
Pole, negative collector electrode, isolation film, battery packages shell, which is characterized in that in the positive collector electrode and negative collector electrode, all set
Having pore diameter range is the high density of 0.001mm ~ 0.2mm, micron order micropore, is provided with protrusion on the micropore of the positive collector electrode
The burr of shape is jagged micropore；It is not provided with convex burr on the micropore of the negative collector electrode, is impulse- free robustness micropore；Institute
The two sides coating anode sizing agent of positive collector electrode is stated, the two sides of the negative collector electrode is coated with negative electrode slurry.
2. a kind of secondary cell by two kinds of micropore collector combined applications according to claim 1, which is characterized in that institute
State the center spacing in positive collector electrode and negative collector electrode between micropore and micropore are as follows: 0.001mm ~ 0.6mm.
3. a kind of secondary cell by two kinds of micropore collector combined applications according to claim 1, which is characterized in that institute
It states in positive collector electrode and negative collector electrode, the range of pore arrangement density are as follows: 1 ~ 20000 hole/mm2。
4. a kind of secondary cell by two kinds of micropore collector combined applications according to claim 1, which is characterized in that institute
State the burr height range of micropore in positive collector electrode are as follows: 0.01 ~ 0.1mm.
5. a kind of secondary cell by two kinds of micropore collector combined applications according to claim 1, which is characterized in that institute
State negative collector electrode, the porosity ranges of micropore are as follows: 0.1% ~ 90%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821082565.9U CN208781948U (en) | 2018-07-10 | 2018-07-10 | A kind of secondary cell by two kinds of micropore collector combined applications |
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| CN201821082565.9U CN208781948U (en) | 2018-07-10 | 2018-07-10 | A kind of secondary cell by two kinds of micropore collector combined applications |
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| CN208781948U true CN208781948U (en) | 2019-04-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649268A (en) * | 2019-09-29 | 2020-01-03 | 昆山宝创新能源科技有限公司 | Negative current collector for lithium battery and lithium battery |
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2018
- 2018-07-10 CN CN201821082565.9U patent/CN208781948U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649268A (en) * | 2019-09-29 | 2020-01-03 | 昆山宝创新能源科技有限公司 | Negative current collector for lithium battery and lithium battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190909 Address after: 410633 Jingcheng A Block 1008, Huaming North Road, Tongyi Community, Yutan Street, Ningxiang County, Changsha City, Hunan Province Patentee after: Changsha Li Anneng Electronic Technology Co. Ltd. Address before: 410600 Hunan province Changsha huichuntang village Ningxiang County town of Tak Group's old barn Co-patentee before: Zhou Qing Xiang Patentee before: Wu Xiao Lin |