CN101714654A - High-power square lithium ion battery - Google Patents
High-power square lithium ion battery Download PDFInfo
- Publication number
- CN101714654A CN101714654A CN200910172636A CN200910172636A CN101714654A CN 101714654 A CN101714654 A CN 101714654A CN 200910172636 A CN200910172636 A CN 200910172636A CN 200910172636 A CN200910172636 A CN 200910172636A CN 101714654 A CN101714654 A CN 101714654A
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- CN
- China
- Prior art keywords
- pole piece
- lithium ion
- ion battery
- active material
- piece body
- 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.)
- Pending
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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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- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention relates to a high-power square lithium ion battery, relates to a battery pole piece, and aims to provide a high-power square lithium ion battery of which the pole piece is not folded. The invention adopts the technical scheme that the high-power square lithium ion battery comprises a pole piece body, one side edge of the positive or negative pole piece body is provided with a pole piece body which is not coated with a positive or negative pole active material layer, and notches are evenly distributed along the transverse direction on the pole piece body which is not coated with the positive or negative pole active material layer. Compared with the prior art, the high-power square lithium ion battery has the remarkable advantage that the battery is not folded in rolling, and is used for a power lithium battery.
Description
Technical field:
The present invention relates to a kind of battery pole piece, particularly a kind of high-power square lithium ion battery.
Background technology:
Lithium ion battery is owing to its specific energy height, have extended cycle life and advantage such as friendly environment, and its purposes has been developed to the direction that energy is big, power is higher by small-power, as electric tool, electric motor car etc., requires battery at the above multiplying power discharging of 10C.Yet existing small-power lithium battery just, the planform of cathode pole piece can not satisfy the requirement of high-power lithium ion battery, 02295729.4 it is a kind of just that patent provides, one side of cathode pole piece leaves the pole piece structure of uncoated active material, though having solved collector in the past, to occupy the coated area of active material little, but positive/negative plate for the high power lithium electricity, because in order to obtain high battery capacity, need the active material layer on the pole piece is rolled, improve packing, but, this pole piece is after rolling, the pole piece matrix extensional that is coated with the active bed of material and uncoated active layer is different, cause the pole piece fold and influence use, even can't use at all.
Summary of the invention:
The purpose of this invention is to provide the not high-power square lithium ion battery of fold of a kind of pole piece.Technical scheme of the present invention is, comprises the pole piece body, it is characterized in that: be provided with at a side of plus or minus pole piece body and do not apply plus or minus utmost point active material layer pole piece body, do not apply on the pole piece body of plus or minus utmost point active material layer along laterally being evenly equipped with breach at this.Ratio≤0.25 of the width b of described width a that does not apply breach uniform on the pole piece matrix of plus or minus utmost point active material layer and the pole piece body between the breach.The present invention has compared with the prior art and rolls the not remarkable advantage of fold.
Description of drawings:
Fig. 1 is a front view of the present invention, and Fig. 2 is the A-A profile of Fig. 1, and Fig. 3 is the electric core schematic diagram of the lithium battery that rolls after positive plate, barrier film with Fig. 1 and the negative plate stack.
Embodiment:
In conjunction with above accompanying drawing the present invention is described in detail, in the process of rolling, be out of shape the problem of the fold of different and generation for fear of the plus or minus pole piece that applies active material, the plus or minus pole piece matrix of reserving the certain width that does not apply the negative or positive electrode active material on one side of pole piece is a collector, on the above-mentioned plus or minus pole piece matrix that does not apply the negative or positive electrode active material, cut out breach equably along laterally (length direction), its width is a, form the uniform collector with certain width b 2, in order just to make, the lamination of negative pole and barrier film is after being wound into tubular, staggering fully can not appear in plus plate current-collecting body 2 of each layer and the negative current collector 3 of each layer, generally should make a/b≤0.25.Above-mentioned positive plate jaggy or the negative plate made, on two surfaces outside the collector 2, apply the negative or positive electrode active material and form active material layer 1, the pole piece that applies active material layer is rolled, obtain highdensity active material layer, make battery have big capacity.Because uniform breach on the collector, fold does not take place in pole piece, thereby does not influence the coiling of both positive and negative polarity.To promptly being wound into the rectangular cell core after the above-mentioned anode pole piece of making and cathode pole piece and the barrier film stack, place in the battery container, collector to positive and negative electrode welds after positive and negative output 5,3 is connected with battery plus-negative plate respectively then, and chargeable lithium ion battery is promptly made in the sealing of filling electrolyte.Making active material layer on the positive and negative electrode active material lead foil of lithium battery routinely and the Copper Foil builds up and is wound into the quadrate lithium battery that the rectangular cell core is made with barrier film after rolling, carry out performance test results: battery capacity/mAh:5335, internal resistance m Ω: 4.1,25A discharge capacity ratio is: 96.3%, and threshold voltage in the 25A discharge: 2.91.
Claims (2)
1. high-power square lithium ion battery, comprise the pole piece body, it is characterized in that: be provided with at a side of plus or minus pole piece body and do not apply plus or minus utmost point active material layer pole piece body, do not apply on the pole piece body of plus or minus utmost point active material layer along laterally being evenly equipped with breach at this.
2. a kind of high power lithium ion cell as claimed in claim 1 is characterized in that: ratio≤0.25 of the width b of described width a that does not apply breach uniform on the pole piece matrix of plus or minus utmost point active material layer and the pole piece body between the breach.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910172636A CN101714654A (en) | 2009-11-10 | 2009-11-10 | High-power square lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910172636A CN101714654A (en) | 2009-11-10 | 2009-11-10 | High-power square lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101714654A true CN101714654A (en) | 2010-05-26 |
Family
ID=42418046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910172636A Pending CN101714654A (en) | 2009-11-10 | 2009-11-10 | High-power square lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101714654A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600038A (en) * | 2019-02-21 | 2020-08-28 | Sk新技术株式会社 | Substrate for electrode and method of manufacturing electrode using the same |
-
2009
- 2009-11-10 CN CN200910172636A patent/CN101714654A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111600038A (en) * | 2019-02-21 | 2020-08-28 | Sk新技术株式会社 | Substrate for electrode and method of manufacturing electrode using the same |
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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 | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100526 |