CN101150184A - A coiling lithium secondary battery - Google Patents
A coiling lithium secondary battery Download PDFInfo
- Publication number
- CN101150184A CN101150184A CNA2006100626561A CN200610062656A CN101150184A CN 101150184 A CN101150184 A CN 101150184A CN A2006100626561 A CNA2006100626561 A CN A2006100626561A CN 200610062656 A CN200610062656 A CN 200610062656A CN 101150184 A CN101150184 A CN 101150184A
- Authority
- CN
- China
- Prior art keywords
- active material
- electrical core
- battery
- coated
- lithium secondary
- 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.)
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 16
- 229910052744 lithium Inorganic materials 0.000 title claims description 16
- 238000005452 bending Methods 0.000 claims abstract description 16
- 239000003792 electrolyte Substances 0.000 claims abstract description 5
- 239000011149 active material Substances 0.000 claims description 24
- 230000004888 barrier function Effects 0.000 claims description 8
- 239000013543 active substance Substances 0.000 abstract 2
- 239000012528 membrane Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
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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
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
This invention discloses a winded Li-secondary cell including a shell and a core winder and electrolyte in the shell, in which, the winder is formed by winding positive pole plates, membranes and negative pole plates characterizing in not coating active substance inside of the pole plates at the bending place of the winder to prevent fall off of powder so as to avoid micro-short-circuit in the cell caused by fall off active substance breaking the membrane and increase the quality.
Description
Technical field
The present invention relates to the high energy technical field, be specifically related to a kind of coiling lithium secondary battery.
Background technology
After proposing " rocking chair battery " notion (RCB) in 1980, Sony corporation of Japan and Sanyo are respectively at beginning the lithium rechargeable battery practical research in 1985 and 1988, because lithium rechargeable battery has the operating voltage height, specific energy is big, self discharge is little, temperature limit is wide, stable operating voltage, outstanding features such as storage life is long, countries in the world all to lithium rechargeable battery at communication field, portable type electronic product, electric motor car, with the application table of aspects such as space flight and aviation great interest and enthusiasm are shown, and have carried out continuous exploration and improvement at the performance and the manufacturing process of lithium rechargeable battery.
At present, lithium rechargeable battery mostly adopts winding-structure, with the placement of aliging successively of positive plate, barrier film and negative plate, is wound into an electrical core coiling body again.For cylindrical battery, electrical core coiling body can directly be wound into cylindrical.For rectangular cell, electrical core coiling body can be wound into flat or be rolled into the cylindrical flat that is pressed into again earlier.With respect to cylindrical battery, the curvature of pole piece bending place is much bigger in the rectangular cell electrical core coiling body, and the pole piece bending place is fallen material (coming off attached to the active material on the pole piece) easily, and industry is called " dry linting ".The pole piece dry linting causes the battery micro-short circuit easily, and is serious, and dust can pierce through barrier film, makes the positive/negative plate short circuit, causes major safety risks to battery.
Summary of the invention
At above problem, the invention provides a kind of coiling lithium secondary battery that effectively prevents the battery pole piece dry linting.
For realizing above-mentioned technical purpose, the present invention by the following technical solutions:
A kind of coiling lithium secondary battery, electrical core coiling body and electrolyte that it comprises shell and is contained in shell, electrical core coiling body are reeled by positive plate, barrier film and negative plate and are formed, and it is characterized in that: pole piece inboard, electrical core coiling body bending place is not coated with active material.
Technique scheme is further improved and is: be not to be coated with active material in positive plate inboard, electrical core coiling body bending place.
The peak width of coated active material is not 0.1-10mm, preferred 0.5-2mm, and the width of length and pole piece is isometric.
Adopt technique scheme compared with prior art, the useful technique effect that produces is: by at the not coated active material in pole piece inboard, electrical core coiling body bending place, can effectively prevent the inboard dry linting of electrical core coiling body bending place pole piece, thereby the active material of having avoided coming off punctures the phenomenon generation that barrier film causes the inside battery micro-short circuit, effectively raises the battery yields.
Description of drawings
Fig. 1 is a battery battery core coiling body cutaway view of the present invention;
Fig. 2 is a battery battery core coiling body partial enlarged drawing.
Embodiment
The invention provides a kind of coiling lithium secondary battery, electrical core coiling body and electrolyte that it comprises shell and is contained in shell, electrical core coiling body are reeled by positive plate, barrier film and negative plate and are formed, and pole piece inboard, electrical core coiling body bending place is not coated with active material layer.Further improve and be: be not to be coated with active material layer in positive plate inboard, electrical core coiling body bending place.Why be that not being coated with active material layer in the positive plate inboard is because positive plate is thick than negative plate, and the particle particle of positive active material is bigger than the particle particle of negative electrode active material, easier the coming off of active material when pole piece curvature is excessive on the positive plate.It is above-mentioned that not to be coated with the active material layer width be 0.1-10mm, preferred 0.5-2mm, the width of why selecting not to be coated with active material layer is 0.1-10mm, be because be not coated with active material layer when narrow (＜0.5mm) do not have a protective effect; When wide (＞10mm),, the place be coated with active material layer can play effect to the capacity performance of battery because being set on the positive plate, so when wide (＞10mm), will influence the capacity of battery.
Embodiment 1
A kind of coiling lithium secondary battery, electrical core coiling body and electrolyte that it comprises shell and is contained in shell.As shown in Figure 1, electrical core coiling body is reeled by positive plate 20, barrier film 21 and negative plate 22 and is formed, it is 2mm that there is a width positive plate inboard, electrical core coiling body bending place, length and the isometric zone of positive plate width are not coated with active material layer 200, can clearer understanding the present invention by the enlarged drawing Fig. 2 at A place among Fig. 1.
Embodiment 2
Present embodiment and embodiment 1 are basic identical, and just not being coated with the active material layer width is 1.5mm.
Comparative Examples
Make 500 batteries according to the battery manufacturing process identical with top embodiment 1, this battery is that with the battery difference of embodiment 1 manufacturing pole piece inboard, electrical core coiling body bending place is coated with active material layer.This batch battery micro-short circuit rate is 5% after testing, and the battery micro-short circuit rate that pole piece inboard, electrical core coiling body bending place is not coated with active material layer only is 0.5%.
Be not difficult to find by above Comparative Examples, by taking at the not coated active material layer in pole piece inboard, electrical core coiling body bending place, can effectively prevent the inboard dry linting of electrical core coiling body bending place pole piece, thereby the active material of having avoided coming off punctures the phenomenon generation that barrier film causes the inside battery micro-short circuit, effectively reduce the micro-short circuit rate of battery, improved the battery yields.
Claims (4)
1. coiling lithium secondary battery, electrical core coiling body and electrolyte that it comprises shell and is contained in shell, electrical core coiling body is reeled by positive plate, barrier film and negative plate and is formed, and it is characterized in that: pole piece inboard, electrical core coiling body bending place is not coated with active material.
2. coiling lithium secondary battery according to claim 1 is characterized in that: be not to be coated with active material in positive plate inboard, electrical core coiling body bending place.
3. coiling lithium secondary battery according to claim 1 and 2 is characterized in that: the peak width of coated active material is not 0.1-10mm, and the width of length and pole piece is isometric.
4. coiling lithium secondary battery according to claim 3 is characterized in that: the peak width of coated active material is not 0.5-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100626561A CN101150184A (en) | 2006-09-19 | 2006-09-19 | A coiling lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100626561A CN101150184A (en) | 2006-09-19 | 2006-09-19 | A coiling lithium secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101150184A true CN101150184A (en) | 2008-03-26 |
Family
ID=39250592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100626561A Pending CN101150184A (en) | 2006-09-19 | 2006-09-19 | A coiling lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101150184A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579684A (en) * | 2012-07-31 | 2014-02-12 | 华为技术有限公司 | Lithium ion battery and battery core thereof |
| CN107768735A (en) * | 2017-11-09 | 2018-03-06 | 苏州宇量电池有限公司 | A kind of coiled electrode assemblies and lithium ion battery applied to lithium ion battery |
| WO2018121433A1 (en) * | 2016-12-27 | 2018-07-05 | 宁德新能源科技有限公司 | Wound-type battery cell |
| CN109643821A (en) * | 2016-08-24 | 2019-04-16 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery including the electrode assembly |
| CN109980178A (en) * | 2019-04-03 | 2019-07-05 | 焦作市亿星锂电科技有限公司 | A kind of coiled lithium ion battery pole piece |
| WO2022126634A1 (en) * | 2020-12-18 | 2022-06-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and manufacturing system therefor, battery cell, battery and electrical device |
-
2006
- 2006-09-19 CN CNA2006100626561A patent/CN101150184A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103579684A (en) * | 2012-07-31 | 2014-02-12 | 华为技术有限公司 | Lithium ion battery and battery core thereof |
| CN109643821A (en) * | 2016-08-24 | 2019-04-16 | 三星Sdi株式会社 | Electrode assembly and rechargeable battery including the electrode assembly |
| WO2018121433A1 (en) * | 2016-12-27 | 2018-07-05 | 宁德新能源科技有限公司 | Wound-type battery cell |
| US11611111B2 (en) | 2016-12-27 | 2023-03-21 | Ningde Amperex Technology Limited | Wound-type battery cell |
| CN107768735A (en) * | 2017-11-09 | 2018-03-06 | 苏州宇量电池有限公司 | A kind of coiled electrode assemblies and lithium ion battery applied to lithium ion battery |
| CN109980178A (en) * | 2019-04-03 | 2019-07-05 | 焦作市亿星锂电科技有限公司 | A kind of coiled lithium ion battery pole piece |
| WO2022126634A1 (en) * | 2020-12-18 | 2022-06-23 | 宁德时代新能源科技股份有限公司 | Electrode assembly and manufacturing method and manufacturing system therefor, battery cell, battery and electrical device |
| CN115699398A (en) * | 2020-12-18 | 2023-02-03 | 宁德时代新能源科技股份有限公司 | Electrode assembly, method and system for manufacturing electrode assembly, battery cell, battery, and electric device |
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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: 20080326 |