CN101577330A - Method for preparing winding electrode slice of lithium ion battery electrode assembly - Google Patents
Method for preparing winding electrode slice of lithium ion battery electrode assembly Download PDFInfo
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- CN101577330A CN101577330A CNA2009103034899A CN200910303489A CN101577330A CN 101577330 A CN101577330 A CN 101577330A CN A2009103034899 A CNA2009103034899 A CN A2009103034899A CN 200910303489 A CN200910303489 A CN 200910303489A CN 101577330 A CN101577330 A CN 101577330A
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- electrode slice
- pole piece
- cut
- electrode assembly
- coating
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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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Abstract
The invention relates to a method for preparing a winding electrode slice of a lithium ion battery electrode assembly. The invention is characterized in that the method comprises the following concrete steps according to the preparation process of the electrode slice: coating, wherein, the coating length of the electrode slice is larger than that in accordance with the process requirements of the electrode assembly when the electrode slice is coated; cutting, wherein, the cutting positions of the electrode slice are set at the positions of starting/terminating ends for coating the electrode slice, and the starting/terminating ends are cut away from the electrode slice; and ensuring that the coating length of the cut electrode slice is equal to that in accordance with the process requirements of the electrode assembly. The invention has the following beneficial effects: no metal foil is exposed outside the coating layer of the cut electrode slice, thereby facilitating the insertion of the electrode slice during the winding process, avoiding the short circuit of the electrode assembly caused by the stressed metal foil that is corrugated or the diaphragm perforated by the metal foil, and improving the product safety; and the electrode assembly has great uniformity in the thickness thereof; by eliminating the thickness difference, like the starting/terminating ends coating the electrode slice, the rest coating part of the electrode slice has high uniformity in the thickness, thereby improving the uniformity in the thickness of the electrode assembly.
Description
Technical field
The invention belongs to battery winding technology, relate in particular to a kind of manufacture method of winding electrode slice of lithium ion battery electrode assembly.
Background technology
The utmost point group of lithium ion battery generally is made up of positive plate, negative plate, barrier film etc.Positive and negative plate all be by coating method will be just/cathode size is coated on the metal forming.Production for the ease of subsequent handling, be that segmentation applies on the metal forming, so the coated weight at every section coating initiating terminal or clearing end all can have a change procedure, thereby make the coating thickness difference to some extent of other coated portion of the coating thickness that applies initiating terminal or clearing end and metal forming.At present, the pole piece manufacture method of pole piece coiling operation is: the coated length of pole piece equals the coated length of utmost point group demand, cuts on metal forming uncoated between two coated length of pole piece.Cut the coiling pole piece that obtains in this way.Apply initiating terminal and clearing end coating material and still be retained on the pole piece, and all have metal forming just exposing/the cathode size coat at the two ends of pole piece.This causes easily: 1. apply the difference of initiating terminal and clearing end coating thickness, can cause the deviation of utmost point group integral thickness; 2. metal foil thickness is thin, and hardness is little, in winding process, just exposing/metal forming of cathode size coat easily because of the stressed fold that causes, causes the short circuit of utmost point group thereby pierce through barrier film when pole piece inserts.
Summary of the invention
The present invention is in order to overcome deficiency of the prior art, a kind of manufacture method of winding electrode slice of lithium ion battery electrode assembly is provided, can effectively solve utmost point group difference in thickness that existing coiling pole piece method caused, avoid just exposing owing to metal foil thickness is thin/metal forming of cathode size coat pierces through barrier film, causes the short circuit of utmost point group.
The present invention is achieved through the following technical solutions for achieving the above object: a kind of manufacture method of winding electrode slice of lithium ion battery electrode assembly is characterized in that: require concrete steps to be according to the pole piece manufacture craft:
Apply: when pole piece applies, the coated length of pole piece coated length greater than utmost point group technological requirement;
Cut: the position that cuts of pole piece is located at initiating terminal/clearing end place that pole piece applies, and initiating terminal/clearing end is cut rejecting from pole piece;
The coated length of excision back pole piece equates with the coated length of utmost point group technological requirement.
Beneficial effect: the pole piece after cutting, coat no longer include metal forming outward and expose, and pole piece inserts difficulty in the winding process thereby reduced, and has avoided the stressed fold of metal forming, metal forming to pierce through the appearance that barrier film causes utmost point group short-circuit conditions, has improved Product Safety; Utmost point group consistency of thickness is good: pole piece applied after these difference in thickness of initiating terminal/clearing end partly reject, and pole piece residue coated portion consistency of thickness height, thus improved the consistency of utmost point group thickness.
Description of drawings:
Fig. 1 is that pole piece of the present invention applies initiating terminal/clearing end structural representation;
Fig. 2 is a pole piece trimming mode schematic diagram of the present invention;
Fig. 3 is the coiling pole piece trimming mode schematic diagram of known technology.
Embodiment
Below in conjunction with preferred embodiment, to details are as follows according to embodiment provided by the invention:
As shown in the figure, a kind of manufacture method of winding electrode slice of lithium ion battery electrode assembly, concrete steps are:
1, applies: when pole piece applies, the coated length of pole piece coated length greater than utmost point group technological requirement;
2, cut: the position that cuts of pole piece is located at initiating terminal/clearing end place that pole piece applies, and initiating terminal/clearing end is cut rejecting from pole piece;
3, the coated length of excision back pole piece equates with the coated length of utmost point group technological requirement.
See Fig. 3 for details, pole piece by metal forming 1, just/cathode size coat 2 forms; Wherein just/cathode size coat 2 is coated in up and down on two wide of metal forming 1.And according to the production technology setting, segmentation applies.Because coating method and equipment precision, the coating initiating terminal 3 of pole piece and clearing end 4 thickness can other apply position thickness difference to some extent with pole piece.
See accompanying drawing 1-2 for details, the coated length of pole piece is slightly larger than the coated length of utmost point group demand, pole piece cut the position near initiating terminal 3 that pole piece applies, clearing end 4, and initiating terminal 3, clearing end 4 are cut rejecting from pole piece.The coated length of excision back pole piece equates with the coated length of utmost point group demand.
In the example shown in the accompanying drawing 2, initiating terminal 3 separates with clearing end 4 and cuts.In actual production, can select the mode that cuts according to on-site actual situations.As only cut initiating terminal, only cut that clearing end, initiating terminal and clearing end cut simultaneously, initiating terminal and clearing end separately cut etc.
The above only is preferred embodiment of the present invention, is not structure of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1. the manufacture method of a winding electrode slice of lithium ion battery electrode assembly is characterized in that: require concrete steps to be according to the pole piece manufacture craft:
One. apply: when pole piece applies, the coated length of pole piece coated length greater than utmost point group technological requirement;
Two. cut: the position that cuts of pole piece is located at initiating terminal/clearing end place that pole piece applies, and initiating terminal/clearing end is cut rejecting from pole piece;
Three. the coated length of excision back pole piece equates with the coated length of utmost point group technological requirement.
2. the manufacture method of winding electrode slice of lithium ion battery electrode assembly according to claim 1 is characterized in that: described step 2 pole piece trimming mode is selected only to cut initiating terminal or is only cut that clearing end or initiating terminal and clearing end cut simultaneously or initiating terminal and clearing end separately cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103034899A CN101577330A (en) | 2009-06-22 | 2009-06-22 | Method for preparing winding electrode slice of lithium ion battery electrode assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009103034899A CN101577330A (en) | 2009-06-22 | 2009-06-22 | Method for preparing winding electrode slice of lithium ion battery electrode assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101577330A true CN101577330A (en) | 2009-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009103034899A Pending CN101577330A (en) | 2009-06-22 | 2009-06-22 | Method for preparing winding electrode slice of lithium ion battery electrode assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN101577330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867058A (en) * | 2010-07-09 | 2010-10-20 | 湖南科霸汽车动力电池有限责任公司 | Manufacturing method for electric core |
-
2009
- 2009-06-22 CN CNA2009103034899A patent/CN101577330A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867058A (en) * | 2010-07-09 | 2010-10-20 | 湖南科霸汽车动力电池有限责任公司 | Manufacturing method for electric core |
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| 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: 20091111 |