CN202172108U - Coiled core structure for lithium ion battery - Google Patents
Coiled core structure for lithium ion battery Download PDFInfo
- Publication number
- CN202172108U CN202172108U CN2011203165154U CN201120316515U CN202172108U CN 202172108 U CN202172108 U CN 202172108U CN 2011203165154 U CN2011203165154 U CN 2011203165154U CN 201120316515 U CN201120316515 U CN 201120316515U CN 202172108 U CN202172108 U CN 202172108U
- Authority
- CN
- China
- Prior art keywords
- copper foil
- lithium ion
- ion battery
- blank
- blank end
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a coiled core structure for a lithium ion battery and belongs to the manufacture field of lithium ion batteries. The coiled core structure for the lithium ion battery comprises a positive electrode plate, a negative electrode plate and a coiled layer formed by winding a diaphragm and positioned between the positive electrode plate and the negative electrode plate, wherein the positive electrode plate is an aluminium foil of which the inner surface and the outer surface are provided with positive pole active material coating layers; the negative electrode plate is a copper foil of which the inner surface and the outer surface are provided with negative active material coating layers; an aluminium lug is riveted at one end of the aluminium foil, wherein the end of the aluminium foil is a blank end; a nickel lug is riveted at the other end of the copper foil, wherein the end of the aluminium foil is also a blank end; the blank end of the copper foil is folded and positioned at the innermost layer of the coiled layer; no diaphragm is arranged between two adjacent copper foils positioned at the innermost layer; and the blank end of the aluminium foil is positioned at the outermost layer of the coiled layer. The coiled core structure for the lithium ion battery can improve the safety performance of the batteries, reduce the cost of the batteries, reduce the thickness of finished product batteries and improve the pass rate of the products.
Description
Technical field
The utility model relates to a kind of volume cored structure of lithium ion battery, belongs to lithium ion battery and makes the field.
Background technology
Lithium ion battery is because it has the energy density height, and self discharge is little, does not have memory effect, and advantages such as environmental protection in the application of secondary cell, have extended to electric tool, large-scale energy storage and electrokinetic cell field from the communications industry field.Along with the continuous expansion in lithium ion battery applications field, the expansion day by day of market scope, the production cost of lithium ion battery and safety problem become the problem of overriding concern.For lithium ion battery production cost problem; Active matter and electrolyte material technology developed comparatively fast at home in recent years, and the lithium ion battery raw material have been realized production domesticization basically, produced the lithium ion battery cost and were also controlled preferably; But in lithium-ion battery system; Crucial raw material barrier film develops ripe not enough at home, and one all need use imported product, and cost is higher.Barrier film is the important component part of lithium ion battery cell; It plays anode and negative pole is separated; And have electronic isolation property and ionic conductivity; Therefore barrier film also has bigger influence to the fail safe of battery, and under the situation that diaphragm material must use, how reducing the barrier film use amount, to reduce the lithium ion production cost be a maximum problem of research in the industry.
Chinese patent CN201708217U has announced a kind of lithium ion battery coil core; In this volume cored structure; Positive plate, barrier film and negative plate once stack, and barrier film is between positive plate and negative plate, and an end of positive plate and the other end of negative plate respectively are provided with a lug.In this patent, only stipulated the relation between both positive and negative polarity and the barrier film,, reduced the danger of the internal short-circuit that battery deformation causes the maximization of the spacing of lug.And in present battery design and the production, the overlapping problem of both positive and negative polarity lug can not appear, this battery roll core structure influences very little to the raising of security performance and the reduction of production cost.
Summary of the invention
The utility model is to the deficiency of prior art, and the structure of the lithium ion battery coil core that a kind of use amount simple in structure, barrier film reduces is provided.The nickel lug of this structure can access multiple protective, improves the security performance of battery, reduces battery cost, and reduces the thickness of finished product battery, improves the qualification rate of product.
A kind of volume cored structure of lithium ion battery; Comprise by positive plate, negative plate and the membrane coil between this positive plate and negative plate around the volume layer that forms; Described positive plate is the aluminium foil that inside and outside surface is provided with the positive active material coating, and negative plate is the Copper Foil that inside and outside surface is provided with the negative electrode active material coating, it is characterized in that: an end of aluminium foil is not for being provided with the blank end of positive active material coating; The other end of Copper Foil is not for being provided with the blank end of negative electrode active material coating; The blank end riveted joint of aluminium foil has aluminium pole ears, and the blank end riveted joint of Copper Foil has the nickel lug, and the blank end of said Copper Foil folds and be positioned at the innermost layer of volume layer; Do not have barrier film between adjacent two Copper Foils of innermost layer, the blank end of aluminium foil is positioned at the outermost layer of volume layer.
The blank end after described barrier film folds Copper Foil and the other end of Copper Foil coat, and positive plate and negative plate are separated.Prevent that the two poles of the earth contact from causing short circuit, in addition: the blank end after barrier film folds Copper Foil coats, and reduces the use of barrier film, reduces production costs.
Negative electrode active material coating on the said innermost layer Copper Foil outer surface originates in the bending part of the blank end of Copper Foil, the blank end of said Copper Foil, and the blank length of Copper Foil inner surface is 2.5-3 times of Copper Foil outer surface space length.
The blank end of said aluminium foil, the blank length of aluminium foil outer surface are 2.5-3 times of aluminium foil inner surface space length.
Described aluminium pole ears is away from the nickel lug.
The beneficial effect of the utility model is:
1, the battery roll core structure of the utility model does not have barrier film between adjacent two Copper Foils of innermost layer, and barrier film is that the blank end after folding begins to coat from Copper Foil; Rather than begin from the termination of Copper Foil; Save two-layer barrier film on the one hand, reduced the cost of barrier film, reduced the thickness of volume core on the other hand; Help large-scale production, improve the qualification rate of product.
2, the battery roll core structure of the utility model; The blank end of said Copper Foil folds and is positioned at the innermost layer of volume layer; The blank end of Copper Foil after folding is wrapped in the inside with the nickel lug; The nickel lug can access multiple protective, avoids the burr diaphragm of nickel lug riveted joint place to cause and anodal short circuit, the security performance of assurance battery of forming.
Description of drawings
Fig. 1 is the sketch map of the utility model battery volume cored structure to be spooled;
The sketch map that Fig. 2 reels for the utility model battery roll core;
Wherein, 1, barrier film; 2, Copper Foil; 3, nickel lug; 4, negative electrode active material coating; 5, positive active material coating; 6, aluminium foil; 7, aluminium pole ears.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done to further describe, but the utility model protection range is not limited thereto.
Embodiment 1:
A kind of volume cored structure of lithium ion battery, structure is shown in Figure 2, comprises positive plate, negative plate and the barrier film 1 between this positive plate and negative plate; Positive plate, negative plate and barrier film 1 are reeled and are formed the volume layer; This volume layer is lithium ion battery coil core, and positive plate is the aluminium foil 6 that inside and outside surface is provided with positive active material coating 5, and an end of aluminium foil 6 is not for being provided with the blank end of positive active material coating 5; Preferably; The blank length of the outer surface of this blank end is 2.5 times of inner surface space length, in the prior art, and the lithium ion battery of different size; The blank end of battery roll core length different, the blank length of outer surface is that 2.5 times of inner surface space length are optimum efficiency.The blank end riveted joint of aluminium foil 6 has aluminium pole ears 7, and aluminium pole ears 7 is positioned at the end of this blank end.
Negative plate is the Copper Foil 2 that inside and outside surface is provided with negative electrode active material coating 4; The other end of Copper Foil 2 is not for being provided with the blank end of negative electrode active material coating 4; The blank end riveted joint of Copper Foil 2 has nickel lug 3, and nickel lug 3 is positioned at the end of this blank end, and the blank end of Copper Foil 2 folds and be positioned at the innermost layer of volume layer; The blank end of Copper Foil after folding is wrapped in the inside with nickel lug 3; The nickel lug can access multiple protective, the blank end after folding and the other end coating of Copper Foil 2 with Copper Foil 2 of no barrier film 1 between adjacent two Copper Foils of innermost layer, barrier film 1.Negative electrode active material coating 4 on innermost layer Copper Foil 2 outer surfaces originates in the bending part of Copper Foil 2 blank ends, the blank end of said Copper Foil 2, and the blank length of Copper Foil 2 inner surfaces is 3 times of Copper Foil outer surface space length.The blank end of aluminium foil is positioned at the outermost layer of volume layer.
Preferred aluminium pole ears 6 is away from nickel lug 3.
During coiling; As shown in Figure 1, earlier that the blank end of Copper Foil 2 is inwardly folding along the section start of Copper Foil outer surface negative electrode active coating, nickel lug 3 is coated on Copper Foil 2 the insides; Copper Foil 2 after folding coats with the blank end with barrier film 1 then, and the prior art septation to be end face from Copper Foil 2 begin parcel.Barrier film adopts the advantage of this kind design: reduce two-layer barrier film, reduced the use cost of barrier film, and reduced the thickness of volume core, help production control, the qualification rate of product improves.Behind the Copper Foil that coats barrier film 12 volumes one folding; Again aluminium foil 6 is overlayed the top of Copper Foil 2; With nickel lug 3 place ends is axle, with the Copper Foil that stacks, barrier film, aluminum foil coil coiled flat, forms lithium ion battery coil core; When reeling ending, negative electrode active material coating 4 encases positive active material coating 5 fully.The blank end of aluminium foil 6 is wrapped in the outermost layer of battery roll core.
Claims (5)
1. the volume cored structure of a lithium ion battery; Comprise by positive plate, negative plate and the membrane coil between this positive plate and negative plate around the volume layer that forms; Described positive plate is the aluminium foil that inside and outside surface is provided with the positive active material coating, and negative plate is the Copper Foil that inside and outside surface is provided with the negative electrode active material coating, it is characterized in that: an end of aluminium foil is not for being provided with the blank end of positive active material coating; The other end of Copper Foil is not for being provided with the blank end of negative electrode active material coating; The blank end riveted joint of aluminium foil has aluminium pole ears, and the blank end riveted joint of Copper Foil has the nickel lug, and the blank end of said Copper Foil folds and be positioned at the innermost layer of volume layer; Do not have barrier film between adjacent two Copper Foils of innermost layer, the blank end of aluminium foil is positioned at the outermost layer of volume layer.
2. the volume cored structure of a kind of lithium ion battery according to claim 1 is characterized in that: the blank end after folding and the other end coating of Copper Foil with Copper Foil of described barrier film separates positive plate and negative plate.
3. the volume cored structure of a kind of lithium ion battery according to claim 1; It is characterized in that: the negative electrode active material coating on the said innermost layer Copper Foil outer surface originates in the bending part of the blank end of Copper Foil; The blank end of said Copper Foil, the blank length of Copper Foil inner surface are 2.5-3 times of Copper Foil outer surface space length.
4. the volume cored structure of a kind of lithium ion battery according to claim 1 is characterized in that: the blank end of aluminium foil, the blank length of aluminium foil outer surface be aluminium foil inner surface space length 2.5-3 doubly.
5. the volume cored structure of a kind of lithium ion battery according to claim 1, it is characterized in that: described aluminium pole ears is away from the nickel lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203165154U CN202172108U (en) | 2011-08-26 | 2011-08-26 | Coiled core structure for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203165154U CN202172108U (en) | 2011-08-26 | 2011-08-26 | Coiled core structure for lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202172108U true CN202172108U (en) | 2012-03-21 |
Family
ID=45830296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203165154U Expired - Fee Related CN202172108U (en) | 2011-08-26 | 2011-08-26 | Coiled core structure for lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202172108U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157914A (en) * | 2014-09-02 | 2014-11-19 | 山东齐星新能源科技有限责任公司 | High-power flexible packaged lithium ion battery and processing process thereof |
| CN104658758A (en) * | 2015-02-05 | 2015-05-27 | 深圳江浩电子有限公司 | Flat aluminum electrolytic capacitor and manufacturing method thereof |
| CN107732318A (en) * | 2017-07-05 | 2018-02-23 | 东莞市创明电池技术有限公司 | Safety lithium ion cell core and lithium ion battery |
| CN109585928A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Battery core and battery with it |
| CN110783637A (en) * | 2018-07-31 | 2020-02-11 | 瓦尔达微电池有限责任公司 | Method for producing an electrode-separator winding, winding and button cell |
| CN112285139A (en) * | 2020-10-20 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Processing method for cutting battery diaphragm section by argon ion beam |
-
2011
- 2011-08-26 CN CN2011203165154U patent/CN202172108U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104157914A (en) * | 2014-09-02 | 2014-11-19 | 山东齐星新能源科技有限责任公司 | High-power flexible packaged lithium ion battery and processing process thereof |
| CN104157914B (en) * | 2014-09-02 | 2016-03-16 | 山东齐星新能源科技有限责任公司 | A kind of high power flexible packing lithium ion battery and manufacture craft thereof |
| CN104658758A (en) * | 2015-02-05 | 2015-05-27 | 深圳江浩电子有限公司 | Flat aluminum electrolytic capacitor and manufacturing method thereof |
| CN107732318A (en) * | 2017-07-05 | 2018-02-23 | 东莞市创明电池技术有限公司 | Safety lithium ion cell core and lithium ion battery |
| CN109585928A (en) * | 2017-09-29 | 2019-04-05 | 比亚迪股份有限公司 | Battery core and battery with it |
| CN110783637A (en) * | 2018-07-31 | 2020-02-11 | 瓦尔达微电池有限责任公司 | Method for producing an electrode-separator winding, winding and button cell |
| CN110783637B (en) * | 2018-07-31 | 2023-01-17 | 瓦尔达微电池有限责任公司 | Method for producing an electrode-separator winding, winding and button cell |
| CN112285139A (en) * | 2020-10-20 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Processing method for cutting battery diaphragm section by argon ion beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106129483B (en) | A kind of takeup type battery core | |
| CN202172108U (en) | Coiled core structure for lithium ion battery | |
| CN101901934B (en) | Coiled laminate square lithium-ion battery cell and preparation method thereof | |
| CN203415648U (en) | Cell and electrochemical energy storage device | |
| CN203119046U (en) | Low internal resistance lithium ion battery rolled core | |
| CN101714624A (en) | Spiral-line multi-pole lug lithium ion battery and method for manufacturing same | |
| CN101355180A (en) | Cell structure of lithium ion power battery | |
| CN103035954A (en) | Winding lithium ion battery and fabrication method thereof | |
| CN102136603B (en) | Polymer lithium-ion battery and manufacture method thereof | |
| CN203085704U (en) | Lithium ion battery | |
| CN102208679A (en) | Wound continuous laminated square lithium ion power battery | |
| CN202454681U (en) | High-efficiency lithium ion battery | |
| CN102024990A (en) | Method for manufacturing cells of power lithium ion batteries | |
| CN202103131U (en) | Cell of soft-package Lithium-ion power battery | |
| CN107293805A (en) | Takeup type battery core and volume pin | |
| CN113224393A (en) | Roll core for high-capacity battery, parallel roll core group and high-capacity battery | |
| CN205828577U (en) | Takeup type battery core | |
| CN203367419U (en) | Wound electrode plate and lithium ion battery formed by winding same | |
| CN101582521B (en) | Coiled lithium-ion secondary battery taking winding needle as positive and negative electrodes and manufacturing method thereof | |
| CN204045667U (en) | The capacitor batteries that a kind of composite pole piece manufactures | |
| CN201812891U (en) | Lithium battery | |
| CN203218346U (en) | Lithium ion battery wound core termination adhesive tape coating structure | |
| CN202855861U (en) | Core and polymer lithium ion battery | |
| CN102110855A (en) | Power lithium ion battery and manufacturing method thereof | |
| CN103021660A (en) | High-performance aluminium electrolytic capacitor and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120321 Termination date: 20200826 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |