CN205429100U - Lithium ion cell - Google Patents
Lithium ion cell Download PDFInfo
- Publication number
- CN205429100U CN205429100U CN201620261871.3U CN201620261871U CN205429100U CN 205429100 U CN205429100 U CN 205429100U CN 201620261871 U CN201620261871 U CN 201620261871U CN 205429100 U CN205429100 U CN 205429100U
- Authority
- CN
- China
- Prior art keywords
- anode
- piece
- pole
- isolating membrane
- battery core
- 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.)
- Active
Links
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
- Secondary Cells (AREA)
Abstract
The utility model relates to an energy storage device field, especially, relate to a lithium ion cell, including positive pole switching piece, negative pole switching piece and around rolling up an electric core, include the positive pole pole piece around rolling up electric core, the negative pole pole piece, the barrier film, positive pole utmost point ear and negative pole utmost point ear, the positive pole pole piece, barrier film and negative pole pole piece are range upon range of around rolling up, wherein, the barrier film sets up between positive pole pole piece and negative pole pole piece, every layer of positive pole pole piece all is provided with positive pole utmost point ear, the range upon range of setting of all positive pole utmost point ears forms the multipolar ear structure of positive pole, and be connected with positive pole switching piece, every layer of negative pole pole piece all is provided with negative pole utmost point ear, the range upon range of setting of all negative pole utmost point ears forms the multipolar ear structure of negative pole, and be connected with negative pole switching piece, the tip of barrier film has the part that surpasss positive pole pole piece and negative pole pole piece, and the at least a week of electric core is rolled up around winding to this part, and bond fixedly with part that the barrier film is located the inlayer. The lithium ion cell that this application provided has improved on the one hand and has resisted the effect that impales, and on the other hand has reduced the risk of short circuit.
Description
Technical field
The application relates to energy storage device field, particularly relates to a kind of lithium-ion electric core.
Background technology
During the high rate charge-discharge of Soft Roll lithium ion power battery core, in battery core internal resistance and pole piece, CURRENT DISTRIBUTION is to affect the energy ratio of battery core releasing, the key factor of battery core self generation heat during battery core charge rate, big multiplying power discharging.Wherein, battery core internal resistance is the least or in pole piece CURRENT DISTRIBUTION the most uniform, battery core charge rate is the highest, and the energy ratio that during big multiplying power discharging, battery core is released is the highest, and the heat that battery core self produces is the lowest.
And multi pole ears battery core can reduce battery core internal resistance to a certain extent and make the homogeneous current distribution in pole piece.It addition, multi pole ears battery core can also improve the derivation speed of battery core self heat, thus reach to control the purpose of the temperature of battery core.
At present, multi pole ears battery core has stacked and two kinds of frame modes of winding type.Owing to laminated cell is during lamination, anode and cathode pole piece para-position difficulty, and manufacturing cost is higher, the most mostly uses the multi pole ears battery core of winding type.
The multi pole ears coiling battery core of traditional winding type is typically by anode pole piece and cathode sheet coiling, and is intercepted between anode pole piece and cathode sheet by isolating membrane when coiling.The afterbody of isolating membrane is adhesive on internal layer by ending, to ensure that the afterbody of anode pole piece and cathode sheet does not exposes.But, this coiling core strueture only by one layer of isolating membrane parcel, very thin thickness due to its outermost layer, is once pierced and easilys lead to the pole piece of inside and directly contact with external component and cause short circuit.
Utility model content
This application provides a kind of lithium-ion electric core, it is possible to effectively reduce the probability that pole piece directly contacts with external component.
This application provides a kind of lithium-ion electric core, including anode switching piece, negative electrode switching piece and coiling battery core,
Described coiling battery core includes anode pole piece, cathode sheet, isolating membrane, anode lug and cathode tab,
Described anode pole piece, described isolating membrane and described cathode sheet stacking coiling, wherein, described isolating membrane is arranged between described anode pole piece and described cathode sheet,
Every layer of described anode pole piece is provided with described anode lug, and all described anode lug stackings arrange formation anode multi pole ears structure, and are connected with described anode switching piece,
Every layer of described cathode sheet is provided with described cathode tab, and all described cathode tab stackings arrange formation negative electrode multi pole ears structure, and are connected with described negative electrode switching piece,
The end of described isolating membrane has beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and is positioned at the part of internal layer with described isolating membrane and is adhesively fixed.
Preferably, in the two ends of described isolating membrane, the end being positioned at inner side has beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and is positioned at the part of internal layer with described isolating membrane and is adhesively fixed.
Preferably, in the two ends of described isolating membrane, the end being positioned at outside has beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and is positioned at the part of internal layer with described isolating membrane and is adhesively fixed.
Preferably, the two ends of described isolating membrane are respectively provided with beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and are positioned at the part of internal layer with described isolating membrane and are adhesively fixed.
Preferably, the two ends of described isolating membrane beyond the part of described anode pole piece and described cathode sheet all around described coiling battery core one week.
Preferably, the end of described isolating membrane is adhesively fixed by ending glue.
Preferably, in the two ends of described isolating membrane, it is positioned at the end of inner side beyond being positioned at the end in outside, and the part that two ends are positioned at internal layer by ending glue described in same in described isolating membrane is adhesively fixed.
Preferably,
The middle part of described anode multi pole ears structure is bent to form U-shaped structure towards the thickness direction of described coiling battery core, thickness direction towards coiling battery core described in one end of described anode switching piece bends and stretches into the inside of described U-shaped structure, and is connected with described anode multi pole ears structure；
And/or
The middle part of described negative electrode multi pole ears structure is bent to form U-shaped structure towards the thickness direction of described coiling battery core, thickness direction towards coiling battery core described in one end of described negative electrode switching piece bends and stretches into the inside of described U-shaped structure, and is connected with described negative electrode multi pole ears structure.
Preferably,
The width of described anode switching piece is more than the described anode multi pole ears structure width away from one end of described anode pole piece；
And/or
The width of described negative electrode switching piece is more than the described negative electrode multi pole ears structure width away from one end of described cathode sheet.
Preferably,
Described anode switching piece and described anode multi pole ears structure welding,
And/or
Described negative electrode switching piece and described negative electrode multi pole ears structure welding.
The technical scheme that the application provides can reach following beneficial effect:
Lithium-ion electric core provided herein is by extending the end of isolating membrane, and make it around a coiling battery core at least week, the number of plies and the thickness of coiling battery core top layer isolating membrane can be increased substantially, on the one hand improve coiling battery core and resist the effect pierced through, on the other hand, even if generation diapirism, the pole piece that thicker separating film layer also is able within more efficiently prevention coiling battery core directly contacts with external component, thus reduces the risk of short circuit.
It should be appreciated that it is only exemplary that above general description and details hereinafter describe, the application can not be limited.
Accompanying drawing explanation
The plan structure schematic diagram of the coiling battery core that Fig. 1 is provided by the embodiment of the present application；
The side-looking structural representation of the lithium-ion electric core that Fig. 2 is provided by the embodiment of the present application.
Reference:
10-anode switching piece；
20-coiling battery core；
200-anode pole piece；
202-cathode sheet；
204-isolating membrane；
206-anode lug；
208-cathode tab；
26-anode multi pole ears structure.
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet embodiments herein, and for explaining the principle of the application together with description.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing the application is described in further detail."front", "rear" described in literary composition, "left", "right", " on ", D score is all with the laying state of the lithium-ion electric core in accompanying drawing as reference.
As depicted in figs. 1 and 2, present embodiments providing a kind of lithium-ion electric core, it includes anode switching piece 10, negative electrode switching piece (not shown) and coiling battery core 20, the most also includes being wrapped in outermost aluminum plastic film.
Wherein, coiling battery core 20 includes anode pole piece 200, cathode sheet 202, isolating membrane 204, anode lug 206 and cathode tab 208, anode pole piece 200, isolating membrane 204 and cathode sheet 202 stacking coiling, wherein, isolating membrane 204 is arranged between anode pole piece 200 and cathode sheet 202, after coiling completes, the two ends of isolating membrane 204 all can be positioned at the outer layer position of coiling battery core 20.Every layer of anode pole piece 200 is provided with anode lug 206, and the stacking of all anode lugs 206 arranges formation anode multi pole ears structure 26, and is connected (seeing Fig. 2) with anode switching piece 10.Same, every layer of cathode sheet 202 is provided with cathode tab 208, and the stacking of all cathode tab 208 arranges formation negative electrode multi pole ears structure (not shown), and is connected with negative electrode switching piece.
In the present embodiment, the end of isolating membrane 204 need to have beyond anode pole piece 200 and the part of cathode sheet 202, and this part is around a coiling battery core 20 at least week, and it is positioned at the part of internal layer with isolating membrane 20 and is adhesively fixed by ending glue (not shown) or other bonding way.So can increase substantially the number of plies and the thickness of coiling battery core 20 top layer isolating membrane 204, on the one hand improve coiling battery core 20 and resist the effect pierced through, on the other hand, even if generation diapirism, the pole piece that thicker separating film layer also is able within more efficiently prevention coiling battery core 20 directly contacts with external component, thus reduces the risk of short circuit.
In the present embodiment, when two ends of isolating membrane 204 are just beyond anode pole piece 200 and cathode sheet 202, one of them end is positioned at the outermost layer of coiling battery core, and another end is then extended by between anode pole piece 200 and cathode sheet 202, therefore can be in the inner side of another end.
In the two end, can be by the extension of any one end and around coiling battery core 20.Such as, the end being positioned at inner side is made to have beyond anode pole piece 200 and the part of cathode sheet 202, and by this part around a coiling battery core 20 at least week.Or make the end being positioned at outside have beyond anode pole piece 200 and the part of cathode sheet 202, and by this part around a coiling battery core 20 at least week.Although both the above mode all can improve the number of plies of the isolating membrane 204 of coiling battery core 20 outer layer, but when cincture week, number was more than one week (such as two weeks), alternating floor isolating membrane 204 between meeting at least between two ends of isolating membrane 204, therefore after using ending glue to fix to be in the end of internal layer, within this block ending glue also can be wrapped in isolating membrane 204, this has resulted in the decline of battery core energy density.
Therefore, in the present embodiment it is preferred to make the two ends of isolating membrane 204 be respectively provided with beyond anode pole piece 200 and the part of cathode sheet 202 simultaneously, and make these two parts around coiling battery core 20 simultaneously.The most just two ends that can make isolating membrane 204 are simultaneously in the outside of coiling battery core 20, in being wrapped in, thus are not result in that when being adhesively fixed the energy density of battery core reduces.Generally, the two ends of isolating membrane 204 just can make the number of plies of the isolating membrane 204 of coiling battery core 20 outer layer increase two-layer for 20 1 weeks simultaneously around coiling battery core, the most just can meet performance requirement.Further, in the two ends of isolating membrane 204, be positioned at inner side end can beyond be positioned at outside end some, same ending glue the most just can be used the two end is adhesively fixed on isolating membrane 204 to be together positioned in the part of internal layer.The usage amount of ending glue can be reduced in this way, improve the energy density of lithium-ion electric core.
It is limited to existing processing technique, there is many burrs on anode switching piece 10, further, between anode switching piece 10 and anode multi pole ears structure 26, use is welded to connect more, and also can produce solder joint burr after anode switching piece 10 uses the mode welded fixing with anode multi pole ears structure 26.These burrs may puncture isolating membrane 204 even aluminum plastic film, thus cause battery core to be short-circuited, the problem such as leakage.Same, negative electrode switching piece there is also the problems referred to above with negative electrode multi pole ears structure when manufacturing and welding.
As shown in Figure 2, in order to solve this problem, the middle part of the anode multi pole ears structure 26 in the present embodiment is bent to form U-shaped structure towards the thickness direction of coiling battery core 20, one end of anode switching piece 10 bends and stretches into the inside of this U-shaped structure towards the thickness direction of coiling battery core 20, and is connected with anode multi pole ears structure 26.Utilize U-shaped structure to be sandwiched by the connection end of anode switching piece 10 with anode multi pole ears structure 26, thus effectively prevent those burrs contact isolating membrane 204 or aluminum plastic film.Certainly, between negative electrode switching piece with negative electrode multi pole ears structure as this attachment structure can also be used to reach identical technique effect, do not repeat them here.
Anode multi pole ears structure 26 away from one end of anode pole piece 200 owing to lacking constraint, therefore it is relatively easy to cause snail volume, bifurcated because of External Force Acting, fold or even damage, therefore, in the present embodiment the width of anode switching piece 10 more preferably greater than anode multi pole ears structure 26 away from the width of one end of anode pole piece 200.The one end away from anode pole piece 200 so just can be made all to be connected with anode switching piece 10 when anode multi pole ears structure 26 is attached with anode switching piece 10, in order to rely on anode switching piece 10 that this end is played a protective role.Same, still can also use said structure between negative electrode switching piece and negative electrode multi pole ears structure, not repeat them here.
On the one hand the lithium-ion electric core that the present embodiment is provided improves the effect that opposing is pierced through, and on the other hand also reduces the risk of short circuit.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for a person skilled in the art, the application can have various modifications and variations.All within spirit herein and principle, any modification, equivalent substitution and improvement etc. made, within should be included in the protection domain of the application.
Claims (10)
1. a lithium-ion electric core, it is characterised in that include anode switching piece, negative electrode switching piece and coiling battery core,
Described coiling battery core includes anode pole piece, cathode sheet, isolating membrane, anode lug and cathode tab,
Described anode pole piece, described isolating membrane and described cathode sheet stacking coiling, wherein, described isolating membrane is arranged between described anode pole piece and described cathode sheet,
Every layer of described anode pole piece is provided with described anode lug, and all described anode lug stackings arrange formation anode multi pole ears structure, and are connected with described anode switching piece,
Every layer of described cathode sheet is provided with described cathode tab, and all described cathode tab stackings arrange formation negative electrode multi pole ears structure, and are connected with described negative electrode switching piece,
The end of described isolating membrane has beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and is positioned at the part of internal layer with described isolating membrane and is adhesively fixed.
Lithium-ion electric core the most according to claim 1, it is characterized in that, in the two ends of described isolating membrane, the end being positioned at inner side has beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and it is positioned at the part of internal layer with described isolating membrane and is adhesively fixed.
Lithium-ion electric core the most according to claim 1, it is characterized in that, in the two ends of described isolating membrane, the end being positioned at outside has beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and it is positioned at the part of internal layer with described isolating membrane and is adhesively fixed.
Lithium-ion electric core the most according to claim 1, it is characterized in that, the two ends of described isolating membrane are respectively provided with beyond described anode pole piece and the part of described cathode sheet, and this part is around a described coiling battery core at least week, and are positioned at the part of internal layer with described isolating membrane and are adhesively fixed.
Lithium-ion electric core the most according to claim 4, it is characterised in that the two ends of described isolating membrane beyond the part of described anode pole piece and described cathode sheet all around described coiling battery core one week.
Lithium-ion electric core the most according to claim 4, it is characterised in that the end of described isolating membrane is adhesively fixed by ending glue.
Lithium-ion electric core the most according to claim 6, it is characterised in that in the two ends of described isolating membrane, is positioned at the end of inner side beyond being positioned at the end in outside, and the part that two ends are positioned at internal layer by ending glue described in same in described isolating membrane is adhesively fixed.
8. according to the lithium-ion electric core described in any one of claim 1 to 5, it is characterised in that
The middle part of described anode multi pole ears structure is bent to form U-shaped structure towards the thickness direction of described coiling battery core, thickness direction towards coiling battery core described in one end of described anode switching piece bends and stretches into the inside of described U-shaped structure, and is connected with described anode multi pole ears structure；
And/or
The middle part of described negative electrode multi pole ears structure is bent to form U-shaped structure towards the thickness direction of described coiling battery core, thickness direction towards coiling battery core described in one end of described negative electrode switching piece bends and stretches into the inside of described U-shaped structure, and is connected with described negative electrode multi pole ears structure.
Lithium-ion electric core the most according to claim 8, it is characterised in that
The width of described anode switching piece is more than the described anode multi pole ears structure width away from one end of described anode pole piece；
And/or
The width of described negative electrode switching piece is more than the described negative electrode multi pole ears structure width away from one end of described cathode sheet.
10. according to the lithium-ion electric core described in any one of claim 1 to 5, it is characterised in that
Described anode switching piece and described anode multi pole ears structure welding,
And/or
Described negative electrode switching piece and described negative electrode multi pole ears structure welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620261871.3U CN205429100U (en) | 2016-03-31 | 2016-03-31 | Lithium ion cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620261871.3U CN205429100U (en) | 2016-03-31 | 2016-03-31 | Lithium ion cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205429100U true CN205429100U (en) | 2016-08-03 |
Family
ID=56523098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620261871.3U Active CN205429100U (en) | 2016-03-31 | 2016-03-31 | Lithium ion cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205429100U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054331A1 (en) * | 2016-09-22 | 2018-03-29 | 宁德新能源科技有限公司 | Spirally-wound battery cell |
| CN112952206A (en) * | 2021-01-04 | 2021-06-11 | 李曼琳 | Lamination lithium battery core and lamination equipment |
| CN113540706A (en) * | 2021-07-12 | 2021-10-22 | 欣旺达电动汽车电池有限公司 | Battery cell and battery |
| CN114068944A (en) * | 2021-11-11 | 2022-02-18 | 惠州赣锋锂电科技有限公司 | Pole piece and preparation method and application thereof |
| CN115498366A (en) * | 2021-06-18 | 2022-12-20 | 宁德新能源科技有限公司 | Electrochemical device and electric equipment |
| WO2024183073A1 (en) * | 2023-03-09 | 2024-09-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
-
2016
- 2016-03-31 CN CN201620261871.3U patent/CN205429100U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018054331A1 (en) * | 2016-09-22 | 2018-03-29 | 宁德新能源科技有限公司 | Spirally-wound battery cell |
| CN112952206A (en) * | 2021-01-04 | 2021-06-11 | 李曼琳 | Lamination lithium battery core and lamination equipment |
| CN115498366A (en) * | 2021-06-18 | 2022-12-20 | 宁德新能源科技有限公司 | Electrochemical device and electric equipment |
| CN115498366B (en) * | 2021-06-18 | 2024-07-05 | 宁德新能源科技有限公司 | Electrochemical device and electric equipment |
| CN113540706A (en) * | 2021-07-12 | 2021-10-22 | 欣旺达电动汽车电池有限公司 | Battery cell and battery |
| CN114068944A (en) * | 2021-11-11 | 2022-02-18 | 惠州赣锋锂电科技有限公司 | Pole piece and preparation method and application thereof |
| WO2024183073A1 (en) * | 2023-03-09 | 2024-09-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205429100U (en) | Lithium ion cell | |
| CN206332097U (en) | A kind of secondary cell battery core | |
| WO2018054332A1 (en) | Wound cell | |
| CN203415648U (en) | Cell and electrochemical energy storage device | |
| CN207320232U (en) | A kind of lithium ion battery negative electrode and lithium ion battery | |
| CN109830638B (en) | High-hardness flexible-package lithium ion battery pole piece and roll core preparation method | |
| CN206098526U (en) | Coiling formula secondary electricity core | |
| CN206003909U (en) | A kind of takeup type battery core | |
| CN205376656U (en) | Secondary battery | |
| CN206834277U (en) | Takeup type battery core | |
| US10693192B2 (en) | Wound-type cell | |
| CN105742721A (en) | High-energy-ratio low-internal-resistance cylindrical lithium ion battery | |
| CN107546421B (en) | Winding type battery cell | |
| US10833371B2 (en) | Wound-type cell | |
| CN108987656A (en) | Battery | |
| CN202384439U (en) | Lithium ion battery winding structure | |
| CN102208679A (en) | Wound continuous laminated square lithium ion power battery | |
| CN107546404B (en) | Winding type battery cell | |
| CN107302110A (en) | Takeup type battery core | |
| CN212907805U (en) | Pole piece and lithium ion battery | |
| CN205846128U (en) | A kind of secondary cell battery core | |
| CN205646032U (en) | High energy compares, cylindrical lithium ion battery of low internal resistance | |
| CN102760905A (en) | High-capacity lithium battery | |
| CN205723828U (en) | Takeup type battery core | |
| CN205376667U (en) | Naked electric core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |