CN1231522A - Electrode for secondary cell - Google Patents
Electrode for secondary cell Download PDFInfo
- Publication number
- CN1231522A CN1231522A CN98111712A CN98111712A CN1231522A CN 1231522 A CN1231522 A CN 1231522A CN 98111712 A CN98111712 A CN 98111712A CN 98111712 A CN98111712 A CN 98111712A CN 1231522 A CN1231522 A CN 1231522A
- Authority
- CN
- China
- Prior art keywords
- active material
- electrode
- face
- secondary battery
- negative pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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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
-
- 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
- H01M4/24—Electrodes for alkaline accumulators
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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
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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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides secondary battery electrodes enabling weight reduction of a battery to be achieved and capable of increasing the amount of effective active materials formed on the whole electrodes, by removing an active material in an electrode area not confronting an active material on an adjoining electrode. In the secondary battery electrodes each comprised of a positive electrode wounding inside with a separator interposed therebetween and a negative electrode wounding outside, base plates are arranged face to face which have no active material only on a side face of the negative electrode confronting a surface having the active material formed thereon of the positive electrode, that is to say, the active materials coated on the base plates are arranged face to face on a corresponding face of the negative electrode confronting the surface having the active material formed thereon of the positive electrode.
Description
The present invention relates between positive pole and negative pole, to sandwich the secondary cell (rechargeable battery) that dividing plate reels and use electrode, relate in particular to and to get rid of the unwanted active material of the electrode that does not react with adjacent electrode, reduce battery weight, perhaps in same container, can increase the electrode for secondary battery of the formation amount of whole active materials.
Secondary cell is to recharge, can miniaturization and the battery of high capacity.Representational secondary cell mainly adopts ni-mh (Ni-MH) battery and lithium ion (Li-ion) battery.
Wherein, lithium ion battery adopts lithium one transition metal oxide as positive active material, adopts carbon or carbon complex as negative electrode active material.Its adopt lithium salts is dissolved in more than one the organic solvent that comprises oxygen base, nitre (nitrogen) base, sulfate etc. and the material that constitutes as electrolyte, lithium ion moves between above-mentioned positive pole and negative pole, the generation electromotive force discharges and recharges.
The original structure of this lithium ion battery is shown in Fig. 3.As shown in Figure 3, the structure of lithium ion battery is: the electrode reel 8 that electricity anodal 2 and dividing plate 4 and negative pole 6 are wound into together is installed to the inside of the shell 10 that is connected with above-mentioned negative pole 6, install and above-mentioned anodal 2 caps that are connected 12 on top at shell 10, electrolyte is injected in the above-mentioned shell 10, sealed then.Wherein, electrode reel 8 is isolated with insulation board respectively with following in the above, prevents to be connected with shell 10 with seal cover 12.
In the lithium ion battery of installing like this, the electrode as anodal and negative pole, with the difference of battery variety, its active material is difference to some extent.As shown in Figure 4, its manufacturing process is: coating contains the slurry (ス ラ リ-) of active material 18 on the two sides of the substrate 16 of electrode, be dried and roll (volume) pressure after, be cut into the size of regulation.
The various electrodes of making like this 2,6 sandwich dividing plate 4 in the middle of it, are rolled into the inside that is inserted into shell 10 behind the tubular.Yet, in the prior art, electrode, particularly be wound onto the negative pole 6 in the outside of dividing plate 4, as shown in Figure 5, on the tubular winding-structure, the both side ends of its longitudinally produces a kind of like this A, B district, and promptly A, B district do not face the active material of the positive pole 2 of the inboard that is wound onto dividing plate 4.As mentioned above, lithium ion battery faces one another in being rolled into the electrode reel of tubular between the positive pole and negative pole of face, and lithium ion moves, and carries out charge and discharge with this.But the problem of existence is: because A, the B district of negative pole is not in the face of the district of the active material of positive pole 2, so, be actually and can not promote the unwanted district of reacting just to have increased battery weight.In addition, also have such problem: because above-mentioned A, B district have unnecessarily taken the inner space of big or small limited shell 10, the result makes the active material formation amount minimizing of each electrode.
The present invention proposes for the problem that solves above-mentioned prior art existence, its purpose is to provide a kind of like this electrode for secondary battery, promptly get rid of not at the locational electrode district active material in adjacent electrode active material opposite, can alleviate battery weight, increase the active material formation amount of entire electrode.
For achieving the above object, the present invention is by the following technical solutions:
A kind of electrode for secondary battery, it comprises that two electrodes that sandwich dividing plate and be wound onto on inboard and the outside are configured, and is characterized in that: the substrate of uncoated active material exposes a face with the lateral electrode of the mutually not opposed part of face of the active material of formation medial electrode.
Described electrode for secondary battery is characterized in that: be positioned on the opposed faces with the opposed lateral electrode of face that forms active material of medial electrode, the active material that applies on the substrate be arranged to relatively to.Described electrode for secondary battery is characterized in that: the electrode that is wound on the outside is a negative pole.
Described electrode for secondary battery is characterized in that: with the face that the forms anodal active material medial end of opposed negative pole not, only form active material on the substrate outside.
Described electrode for secondary battery is characterized in that: with the face that the forms anodal active material outer layer segment of opposed negative pole not, do not form active material, substrate is exposed.
The present invention is by being wound on inboard positive pole and the electrode that negative pole constituted that is wound on the outside by dividing plate, it is characterized in that: only with the face that applies active material of positive pole not on the side of opposed negative pole, the substrate phase opposite disposed of uncoated active material, be positioned on the opposed faces with negative pole on the face that is coated with active material of above-mentioned positive pole is mutually opposed, the active material that is coated on the substrate faces one another face.
Negative pole of the present invention is to apply active material slurry on a side of substrate, and next process applies active material slurry and makes on another side, and this coating can be controlled.
Therefore, negative pole of the present invention can adopt such manufacturing process: on a side of the substrate 62 of base material, under the state of removing A2, A1, B2 district (they not position, opposite on), apply active material 64 slurries at positive active material, next process is on the another side of substrate 62, under the state of removing A2, B1, B2 district (they not position, opposite on) at positive active material, coating active material 66 slurries, then, make its drying and roll (volume) pressure, cut into the size of regulation.
Effect of the present invention:
By said structure and the effect as can be seen: adopt electrode for secondary battery of the present invention, solved the existing in prior technology problem in fact.
That is to say, the present invention gets on except being wound on the unnecessary active material of the electrode on the electrode reel outside from structure, therefore, can be according to the amount of removed this part active material, correspondingly alleviate cell integrated weight, and can correspondingly reduce the diameter of electrode reel according to this removal amount, so, the total length of electrode can be increased.
Therefore,, then can increase the amount of the active material of electrode integral body if adopt the present invention, so, high capacity cell can be made from effect.
Moreover, if adopt the present invention, then be arranged in the electrode on the electrode reel outermost layer, directly expose outside with the original state of the substrate that is not coated with active material, so shedding of the heat that inside battery produces is respond well, therefore also can obtain to improve the effect of battery security simultaneously.
On the other hand, the present invention is not limited only to above-mentioned specific good invention, and desired the present invention wants in the point range in the claim scope, if the personnel that have common knowledge in the field under this invention, so, no matter who can both carry out various changes.
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
Fig. 1 is that expression secondary battery cathode of the present invention launches sectional drawing.
Fig. 2 is the plane cross section of expression secondary cell of the present invention.
Fig. 3 is the integrally-built skiagraph of the well-known existing secondary cell of expression.
Fig. 4 is the expansion sectional drawing of well-known existing electrode for secondary battery.
Fig. 5 is the plane cross section of the secondary cell of Fig. 3.
Below with reference to the accompanying drawings, describe good embodiment of the present invention in detail.In explanation of the present invention, for reference for the symbol that the formation mark identical with the part of reference in the quoted figures of prior art is identical, so that no longer repeat explanation.
Fig. 1 represents to relate to electrode for secondary battery structure of the present invention.The present invention is illustrated the negative pole of lithium ion battery as an example, the symbol 60 expression lithium ion battery negative poles of accompanying drawing.On the two sides of the substrate 62 of negative pole 60, make the active material 64,66 that constitutes by carbon or carbon complex respectively.
The negative pole of making like this 60 as shown in Figure 2, and place dividing plate 4 between anodal 2, be wound into tubular, make anodal 2 to be positioned at the inboard, negative pole 60 is positioned at the outside.
In the electrode reel of reeling like this, on the tubular winding-structure, produce not A1, B1 district with anodal 2 the opposed zone of active material in the both side ends of the longitudinally of negative pole 60.
So way of the present invention is: not with the opposed cathode zone A1 of positive active material, B1, remove unnecessary active material, only on other parts, active material is set.
For example, at the regional A1 that is positioned at negative pole 60 medial ends, only with the face in the outside on anodal 2 active material opposite on active material 66 is set, on its opposite face, active material 64 is not set.
On the other hand, in the area B 1 that is positioned at negative pole 60 outboard end, only with a face of the inboard on anodal 2 active material opposite on active material 64 is set, on its opposite face, remove active material 66.
, be positioned at the B2 district of the outermost end of negative pole 60 here, not with anodal 2 the opposed part of active material, forms the state of equal non-activity material on two faces, in this part erection joint.And medial end also all forms the no coating area A2 that does not all apply active material on two faces.
The negative pole of the present invention of this structure, its manufacturing process is as follows: a side of the substrate 62 of base material with the zone except A1, A2, the B2 on coating active material 64 slurries, next process, another side with the zone except A2, B1, the B2 district on, coating active material 66 slurries, then, carry out drying and roll extrusion, it is cut into the size of regulation.
Like this, negative pole 60 of the present invention is made to, active material 64,66 area distributions that are provided with on the two sides of substrate 62 have nothing in common with each other, therefore can get rid of in fact not the active material that does not need the zone that the active material with adjacent positive pole 2 reacts, only stay substrate 62, make that cell integrated weight is corresponding to be alleviated, the weight of this part active material that the weight of its minimizing equals to be removed.
Moreover, owing to got rid of above-mentioned part active material, reduce so the diameter of electrode reel is corresponding, can form longer electrode total length, so, can increase the amount of the active material of electrode integral body.
The applicant tests the battery of 18650 sizes, has obtained following effect: weight reduces by 0.5 ~ 6 gram, and the electrode drum diameter reduces 0.5mm at most.
On the other hand, be wound on the situation in the outside of dividing plate 4 with negative pole 60 be main being illustrated for above-mentioned the present invention.But the present invention is not limited only to this, but comprises all situations, no matter is that any electrode that is wound on the electrode for secondary battery reel outside all has this effect.Comprise that the negative pole of such manufacturing and anodal electrode sandwich dividing plate 4 and be wound into tubular, be inserted into the inside of shell 10, come the mount packages lid by liner, sealed after injecting electrolyte at the opening part of its shell 10.So promptly make product.
Claims (5)
1. electrode for secondary battery, it comprises that two electrodes that sandwich dividing plate and be wound onto on inboard and the outside are configured, and is characterized in that: the substrate of uncoated active material exposes a face with the lateral electrode of the mutually not opposed part of face of the active material of formation medial electrode.
2. electrode for secondary battery as claimed in claim 1 is characterized in that: be positioned on the opposed faces with the opposed lateral electrode of face that forms active material of medial electrode, the active material that applies on the substrate be arranged to relatively to.
3. electrode for secondary battery as claimed in claim 1 or 2 is characterized in that: the electrode that is wound on the outside is a negative pole.
4. electrode for secondary battery as claimed in claim 3 is characterized in that: with the face that the forms anodal active material medial end of opposed negative pole not, only form active material on the substrate outside.
5. electrode for secondary battery as claimed in claim 3 is characterized in that: with the face that the forms anodal active material outer layer segment of opposed negative pole not, do not form active material, substrate is exposed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980012541A KR100249340B1 (en) | 1998-04-09 | 1998-04-09 | Electrode used in a secondary battery |
| KR12541/1998 | 1998-04-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1231522A true CN1231522A (en) | 1999-10-13 |
| CN1174504C CN1174504C (en) | 2004-11-03 |
Family
ID=19536014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981117120A Expired - Lifetime CN1174504C (en) | 1998-04-09 | 1998-12-23 | Electrode for secondary cell |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4026958B2 (en) |
| KR (1) | KR100249340B1 (en) |
| CN (1) | CN1174504C (en) |
| DE (1) | DE19849468B4 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188311B (en) * | 2007-09-30 | 2010-09-22 | 广州市鹏辉电池有限公司 | A novel lithium Fe battery and its making technology |
| CN103840096A (en) * | 2012-11-23 | 2014-06-04 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery having the same |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100249340B1 (en) * | 1998-04-09 | 2000-03-15 | 손욱 | Electrode used in a secondary battery |
| KR100563039B1 (en) * | 1999-10-30 | 2006-03-24 | 삼성에스디아이 주식회사 | Sealed battery |
| JP4126862B2 (en) * | 2000-10-05 | 2008-07-30 | ソニー株式会社 | Non-aqueous electrolyte battery and solid electrolyte battery |
| US6716552B2 (en) | 2000-11-30 | 2004-04-06 | Celgard Inc. | Secondary lithium battery construction for improved heat transfer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100249340B1 (en) * | 1998-04-09 | 2000-03-15 | 손욱 | Electrode used in a secondary battery |
-
1998
- 1998-04-09 KR KR1019980012541A patent/KR100249340B1/en not_active IP Right Cessation
- 1998-10-19 JP JP29676698A patent/JP4026958B2/en not_active Expired - Lifetime
- 1998-10-21 DE DE19849468A patent/DE19849468B4/en not_active Expired - Lifetime
- 1998-12-23 CN CNB981117120A patent/CN1174504C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101188311B (en) * | 2007-09-30 | 2010-09-22 | 广州市鹏辉电池有限公司 | A novel lithium Fe battery and its making technology |
| CN103840096A (en) * | 2012-11-23 | 2014-06-04 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery having the same |
| CN103840096B (en) * | 2012-11-23 | 2017-11-17 | 三星Sdi株式会社 | Electrode assemblie and the rechargeable battery with the electrode assemblie |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11307085A (en) | 1999-11-05 |
| CN1174504C (en) | 2004-11-03 |
| KR100249340B1 (en) | 2000-03-15 |
| JP4026958B2 (en) | 2007-12-26 |
| DE19849468B4 (en) | 2008-02-07 |
| DE19849468A1 (en) | 1999-10-14 |
| KR19990079767A (en) | 1999-11-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20041103 |
|
| CX01 | Expiry of patent term |