CN103904284A - Secondary battery with large capacity and high magnification - Google Patents
Secondary battery with large capacity and high magnification Download PDFInfo
- Publication number
- CN103904284A CN103904284A CN201210589517.XA CN201210589517A CN103904284A CN 103904284 A CN103904284 A CN 103904284A CN 201210589517 A CN201210589517 A CN 201210589517A CN 103904284 A CN103904284 A CN 103904284A
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- China
- Prior art keywords
- collector
- large capacity
- secondary cell
- powerful secondary
- battery core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention discloses a secondary battery with large capacity and high magnification. The secondary battery comprises a shell, a battery core accommodated inside the shell and a tab connected to the battery core, wherein the battery core is formed by coiling or laminating a positive piece, a negative piece and a membrane; both the positive piece and the negative piece comprise current collectors and coatings on the current collectors; the current collectors are metal foils with a plurality of through holes in at least parts with the coatings. Compared with the prior art, the secondary battery has the advantages that firstly, the design is reasonable, the structure is simple, and the manufacturing cost is lower; secondly, the contact area between active substances in the coatings and the current collectors are larger, the current collection effect is better, and the large magnification charge and discharge property is better; thirdly, under the condition of the same specification, the current collectors are coated with more active substances, and the energy density of the battery is improved.
Description
[technical field]
The present invention relates to new energy field, relate in particular to a kind of large powerful secondary cell of capacity.
[background technology]
Lithium ion battery is as the important component part of new energy field, it relies on the advantages such as it is lightweight, specific energy is high, operating voltage is high, the life-span is long, self discharge is low, obtain significant progress, and be applied to rapidly in various modernization mobile communication equipments and field of portable electronic apparatus.
Along with growing in intensity of energy crisis, each state is all in the substitute of finding most suitable energy source of car, and lithium ion battery, because it possesses above-mentioned advantage, becomes the preferred new forms of energy of each auto vendor gradually.But due to the characteristic of automobile displacement, therefore, automotive field has proposed requirements at the higher level to the performance of lithium ion battery, topmost is exactly to require lithium battery to realize to continue heavy-current discharge to meet its power needs, and this just requires lithium ion battery to have high-rate discharge ability, also should have a high-energy-density.
And now the practical lithium-ion energy density of manufacturing enterprise only has 100～130Wh/Kg, require 2015 with national energy portion, reach 180Wh/Kg for the energy density of the lithium-ion-power cell of new-energy automobile and also have above suitable gap.
Cause lithium ion battery not there is high-rate discharge ability and the low main cause of energy density is: general traditional cylindrical or rectangular lithium ion battery is by positive/negative plate, barrier film, electrolyte, the compositions such as shell, wherein, positive/negative plate is by compositions such as collector, active material, conductive agent, additives, and described collector generally adopts aluminium foil or the Copper Foil of solid banded structure.The slurry that aforesaid active material, conductive agent, additive etc. are mixed into evenly fills on the positive and negative of paillon foil by coating process.Due to, in battery manufacturing process, active material forms battery core by being attached on metal aluminum foil and Copper Foil through reeling entirely, this process need be used a large amount of metal aluminum foils and Copper Foil, these metal aluminum foils and Copper Foil had both accounted for battery space, increased again the cost of battery, had also increased battery weight, in the situation that determining specification, also can reduce the energy density of battery.Meanwhile, because common collector is the tinsel of solid construction, little with the contact surface area of active material, catchment effect is bad, causes the large multiplying power discharging property of battery poor.
In view of above drawback, be necessary to provide in fact the powerful secondary cell of a kind of improved large capacity to overcome above-mentioned defect.
[summary of the invention]
The invention provides a kind of simple in structure, cheap for manufacturing cost, can increase battery capacity and improve the powerful secondary cell of large capacity of battery multiplying power discharging property again.
To achieve these goals, the present invention adopts following technical scheme: a kind of large powerful secondary cell of capacity, it comprises housing, is contained in the battery core in housing and is connected to the lug in battery core, described battery core is formed through coiling or lamination by positive/negative plate and barrier film, described positive/negative plate includes collector and is coated in the coating on collector, and described collector is the tinsel that at least offers some through holes at applying coating place.
One as the powerful secondary cell of the large capacity of the present invention is improved, and the included collector of described positive plate is aluminium foil.
One as the powerful secondary cell of the large capacity of the present invention is improved, and the included collector of described negative plate is copper foil.
One as the powerful secondary cell of the large capacity of the present invention is improved, and described some through hole compositions are latticed, and described coating is filled in latticed collection liquid surface and through hole by slurry or extrusion coated mode.
Improve as the one of the powerful secondary cell of the large capacity of the present invention, the through hole on described latticed collector be shaped as one or more the combination in rhombus, triangle, square or circle.
Improve as the one of the powerful secondary cell of the large capacity of the present invention, it is banded that described collector is, and its entirety is network structure, is welded with conductive metal sheet on along its length, when applying coating, on described conductive metal sheet, do not apply.
Improve as the one of the powerful secondary cell of the large capacity of the present invention, it is banded that described collector is, along its length, described collector one distolateral without any perforate, remainder is all made fenestral fabric.
One as the powerful secondary cell of the large capacity of the present invention is improved, and described anode collection body thickness is 0.02mm-0.5mm, and negative pole currect collecting body thickness is 0.01mm-0.2mm.
One as the powerful secondary cell of the large capacity of the present invention is improved, and the shell of described ferric phosphate lithium cell is square or cylindrical.
The present invention compared with prior art has the following advantages:
1) reasonable in design, simple in structure, manufacturing cost is lower;
2) contact surface area of the active material in coating and collector is larger, and catchment effect is better, and high rate charge-discharge performance is better;
3) under same size, be coated in active material on collector more, contribute to improve the energy density of battery.
[brief description of the drawings]
Below in conjunction with the drawings and specific embodiments, the powerful secondary cell of the large capacity of the present invention and useful technique effect thereof are elaborated.
Accompanying drawing 1 is the embodiment of the present invention 1 woven wire cloth current collector structure schematic diagram;
Accompanying drawing 2 is the pole piece structure schematic diagram of collector and lug combination in the embodiment of the present invention 1;
Accompanying drawing 3 is the embodiment of the present invention 2 metal foil punching net current collector structure schematic diagrames;
Accompanying drawing 4 is the structural representation of collector and convergent belt combination in the embodiment of the present invention 2.
[embodiment]
Please refer to shown in Fig. 1 to Fig. 4, a kind of large powerful secondary cell of capacity of the present invention, it comprises housing, is contained in the battery core in housing and is connected to the lug in battery core, described battery core is formed through coiling or lamination by positive/negative plate and barrier film, described positive/negative plate includes collector and is coated in the coating on collector, and described collector is the tinsel that at least offers some through holes at applying coating place.In the present invention, the included collector of selected positive plate is banded aluminium foil; The included collector of negative plate is banded copper foil.
Aforesaid collector is the tinsel that at least offers some through holes at applying coating place, and the tinsel of this kind of structure at least comprises following several form: 1) whole tinsel is all offered some through holes (seeing Fig. 1, Fig. 3); 2) described banded paillon foil along its length, have at least one distolateral do not offer through hole (structure and Fig. 4 are similar, difference be convergent belt be not welding on metal nickel strap but the structure of collector itself); 3) described banded paillon foil on Width at interval of a segment distance all can reserve one roughly the region identical with lug shape do not offer through hole (structure of similar Fig. 2, difference is, the position of assigning lug is exactly the region of not offering through hole).
In the present invention, the through hole on described collector be shaped as one or more the combination in rhombus, triangle, square or circle, or other are irregular shape.Described coating forms formed slurry by active material, conductive agent, additive etc., and coating is to be filled in latticed collection liquid surface and through hole by slurry or extrusion coated mode.
Be below two kinds of embodiments of the powerful secondary cell of the large capacity of the present invention:
Embodiment 1: refer to shown in Fig. 1, collector 10 uses aluminium woven wire cloth, and mesh shape is selected rhombus, the string diameter of woven wire cloth is 0.1mm, order number is 50 orders.Reticulated collectors 10 is vertically passed through extrusion coating machine, by both sides simultaneously lateral clearance coating processes the slurry being stirred is squeezed in two surfaces and fenestral porosity of collector, and reserve horizontal white space as lug district 20, lug district 20 width are reserved 7mm, then enter coater oven baking.Then, send into twin rollers compacting, then make through cut-parts and pole piece, the thick 0.1mm that burn-ons in lug district 20, the aluminium strip 30 of wide 5mm is made lug, and the pole piece with lug 40 of making is as shown in Figure 2.
Embodiment 2, refers to shown in Fig. 3,4, and collector 50 adopts punching Copper Foil.Copper thickness 0.05mm, hole shape is selected circle, and the percent opening of collector 50 is 60%.Collector 50 vertically passes through extrusion coating machine, by both sides simultaneously longitudinally continuous coating technique the slurry being stirred is squeezed in two surfaces and through hole of collector, and reserving longitudinal white space as doab 60, doab width is reserved 3mm, then enters coater oven baking; After baking, send into twin rollers to roller compaction.Carry out afterwards cut-parts and pole piece and make, weld thick 0.05mm on doab 60, the metal nickel strap 70 of wide 2.5mm is made convergent belt, and the pole piece of making as shown in Figure 4.
In the present invention, although metallic copper and aluminium all have good ductility, known according to practical experience summary, preferably anode collection body thickness is 0.02mm-0.5mm; Negative pole currect collecting body thickness is 0.01mm-0.2mm.Utilize above-mentioned principle and method, those skilled in the art can be made into square or columniform ferric phosphate lithium cell.
The characteristic that the large capacity high rate lithium iron phosphate cell of the present invention has large capacity and high high-multiplying power discharge is mainly: the collector that offers through hole can be larger with the contact area of active material, in addition, in the certain situation of battery specification, in housing, there are enough spaces to fill some active materials more and improve the capacity of battery with this.
A kind of large powerful secondary cell of capacity of the present invention, be not restricted to described in specification and execution mode, therefore for the personnel of familiar field, can easily realize additional advantage and amendment, therefore in the case of not deviating from the spirit and scope of the universal that claim and equivalency range limit, the present invention is not limited to specific details, representational equipment and illustrates here and the examples shown of describing.
Claims (9)
1. the powerful secondary cell of large capacity, it comprises housing, is contained in the battery core in housing and is connected to the lug in battery core, described battery core is formed through coiling or lamination by positive/negative plate and barrier film, described positive/negative plate includes collector and is coated in the coating on collector, it is characterized in that: described collector is the tinsel that at least offers some through holes at applying coating place.
2. the powerful secondary cell of large capacity as claimed in claim 1, is characterized in that: the included collector of described positive plate is aluminium foil.
3. the powerful secondary cell of large capacity as claimed in claim 1, is characterized in that: the included collector of described negative plate is copper foil.
4. the powerful secondary cell of large capacity as claimed in claim 1, is characterized in that: described some through hole compositions are latticed, and described coating is filled in latticed collection liquid surface and through hole by slurry or extrusion coated mode.
5. the powerful secondary cell of large capacity as claimed in claim 4, is characterized in that: the through hole on described latticed collector be shaped as one or more the combination in rhombus, triangle, square or circle.
6. the powerful secondary cell of large capacity as claimed in claim 1, is characterized in that: described collector is banded, and its entirety is network structure, is welded with conductive metal sheet on along its length, when applying coating, on described conductive metal sheet, does not apply.
7. the powerful secondary cell of large capacity as claimed in claim 1, is characterized in that: described collector is banded, along its length, described collector one distolateral without any perforate, remainder is all made fenestral fabric.
8. the powerful secondary cell of large capacity as claimed in claim 1, is characterized in that: described anode collection body thickness is 0.02mm-0.5mm, negative pole currect collecting body thickness is 0.01mm-0.2mm.
9. the powerful secondary cell of arbitrary large capacity as described in claim 1-8, is characterized in that: the shell of described ferric phosphate lithium cell is square or cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210589517.XA CN103904284A (en) | 2012-12-29 | 2012-12-29 | Secondary battery with large capacity and high magnification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210589517.XA CN103904284A (en) | 2012-12-29 | 2012-12-29 | Secondary battery with large capacity and high magnification |
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| Publication Number | Publication Date |
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| CN103904284A true CN103904284A (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210589517.XA Pending CN103904284A (en) | 2012-12-29 | 2012-12-29 | Secondary battery with large capacity and high magnification |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104200999A (en) * | 2014-08-26 | 2014-12-10 | 中国科学院电工研究所 | Lithium-ion energy storage device |
| CN104393335A (en) * | 2014-12-10 | 2015-03-04 | 深圳市三讯电子有限公司 | Lithium ion battery and manufacturing method thereof |
| CN105870491A (en) * | 2016-04-15 | 2016-08-17 | 辉能（天津）科技发展有限公司 | Lithium ion battery adopting porous conductive base material and capable of preventing pole piece from being crimped in lamination |
| CN108281608A (en) * | 2018-02-07 | 2018-07-13 | 深圳前海优容科技有限公司 | Electrode slice, battery and battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272699A (en) * | 1999-04-16 | 2000-11-08 | 三星Sdi株式会社 | Current collector, electrode and secondary battery using them |
| CN1870326A (en) * | 2006-03-30 | 2006-11-29 | 苏州星恒电源有限公司 | Non-aqueous solution electrochemical device polar plate and its manufacturing method |
| CN102473901A (en) * | 2010-03-29 | 2012-05-23 | 松下电器产业株式会社 | Negative electrode for nonaqueous electrolyte secondary battery, method for producing same, and nonaqueous electrolyte secondary battery |
-
2012
- 2012-12-29 CN CN201210589517.XA patent/CN103904284A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1272699A (en) * | 1999-04-16 | 2000-11-08 | 三星Sdi株式会社 | Current collector, electrode and secondary battery using them |
| CN1870326A (en) * | 2006-03-30 | 2006-11-29 | 苏州星恒电源有限公司 | Non-aqueous solution electrochemical device polar plate and its manufacturing method |
| CN102473901A (en) * | 2010-03-29 | 2012-05-23 | 松下电器产业株式会社 | Negative electrode for nonaqueous electrolyte secondary battery, method for producing same, and nonaqueous electrolyte secondary battery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104200999A (en) * | 2014-08-26 | 2014-12-10 | 中国科学院电工研究所 | Lithium-ion energy storage device |
| CN104200999B (en) * | 2014-08-26 | 2017-03-08 | 中国科学院电工研究所 | A kind of lithium-ion energy storage device |
| CN104393335A (en) * | 2014-12-10 | 2015-03-04 | 深圳市三讯电子有限公司 | Lithium ion battery and manufacturing method thereof |
| CN105870491A (en) * | 2016-04-15 | 2016-08-17 | 辉能（天津）科技发展有限公司 | Lithium ion battery adopting porous conductive base material and capable of preventing pole piece from being crimped in lamination |
| CN108281608A (en) * | 2018-02-07 | 2018-07-13 | 深圳前海优容科技有限公司 | Electrode slice, battery and battery |
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Application publication date: 20140702 |
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