CN218160737U - Full utmost point ear electricity core structure and lithium ion battery - Google Patents
Full utmost point ear electricity core structure and lithium ion battery Download PDFInfo
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- CN218160737U CN218160737U CN202221917511.6U CN202221917511U CN218160737U CN 218160737 U CN218160737 U CN 218160737U CN 202221917511 U CN202221917511 U CN 202221917511U CN 218160737 U CN218160737 U CN 218160737U
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a full utmost point ear electricity core structure and lithium ion battery. The utility model discloses a change utmost point auricle position, make utmost point auricle and electric core perpendicular, and through changing utmost point auricle size, make utmost point auricle width unanimous with electric core width, utmost point auricle has bigger welding area of contact with the mass flow body of electric core like this, is favorable to improving electric core electric conductive property to and improve the multiplying power performance of this structure electric core. In addition, the exposed direction of the tab piece is perpendicular to the battery core, the tab piece has a more flexible deformation mode, and the tab deformation operability is high. Various utmost point ear end for electric core is more nimble in the PACK process, is favorable to improving the PACK effect, improves electric core effective utilization in the module simultaneously, improves module energy density.
Description
Technical Field
The utility model relates to a battery field especially relates to a full utmost point ear electricity core structure and lithium ion battery.
Background
The lithium battery technology is rapidly advanced, the large-scale lithium battery cell becomes a normal state, the market puts forward higher and higher demands on the energy density and the electrical property of the battery cell, and the larger the series battery cells such as a solid-state battery, a lithium ion battery, a sodium ion battery and the like are, the higher and higher the electric conductivity of the battery cell electrode is.
At present, after a conventional battery cell electrode lug is cut and shaped, a battery cell electrode structure still has a lifting space, and a soft-packaged battery cell of a lithium ion battery still has some problems, so that a matched battery cell structure is required.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned prior art not enough, an object of the utility model is to provide a full utmost point ear electricity core structure and lithium ion battery aims at solving the relatively poor problem of current electric core electrode conductivity.
The technical scheme of the utility model as follows:
a full-tab cell structure, comprising: the battery comprises an outer package, a battery core, a positive current collector and a negative current collector which are respectively connected with the two opposite ends of the battery core, a positive lug connected with the positive current collector, and a negative lug connected with the negative current collector;
the battery core, the positive current collector and the negative current collector are all packaged in the outer package;
the length direction of the positive lug is perpendicular to the battery cell, the width of the positive lug is the same as that of the battery cell, the positive lug extends from the inside of the outer package to the outside of the outer package along the length direction, and a positive lug glue layer is coated on the packaging area of the positive lug;
the length direction of the negative pole lug piece is perpendicular to the battery cell, the width of the negative pole lug piece is the same as that of the battery cell, the negative pole lug piece extends from the inside of the outer package to the outside of the outer package along the length direction, and a negative pole lug glue layer is coated on the packaging area of the negative pole lug piece;
the extranal packing is both ends open-ended structure, the one end opening of extranal packing passes through the positive electrode tab glue film is sealed, the other end opening of extranal packing passes through the negative electrode tab glue film is sealed.
Optionally, one end of the two ends of the positive electrode lug piece along the length direction extends out of the outer package, and the other end of the positive electrode lug piece extends to be parallel to the bottom of the battery cell;
one end of the two ends of the negative pole lug piece along the length direction extends to the outside of the outer package, and the other end of the negative pole lug piece extends to be level with the bottom of the battery cell.
Optionally, the length of the positive electrode tab glue layer in the width direction of the positive electrode tab is the same as the width of the battery cell, the positive electrode tab glue layers are symmetrically coated on the first surface and the second surface of the positive electrode tab, and the first surface and the second surface are two surfaces opposite to the positive electrode tab;
the length of the negative pole lug glue layer in the width direction of the negative pole lug is the same as the width of the battery cell, the first surface and the second surface of the negative pole lug are symmetrically coated with the negative pole lug glue layer, and the first surface and the second surface are two opposite surfaces of the negative pole lug.
Optionally, the thickness of the positive tab adhesive layer on each side is 0.05-0.3mm, and the thickness of the negative tab adhesive layer on each side is 0.05-0.3mm.
Optionally, the length of the positive electrode tab glue layer along the length direction of the positive electrode tab is 2-10mm, and the length of the negative electrode tab glue layer along the length direction of the negative electrode tab is 2-10mm.
Optionally, the battery cell body includes a plurality of positive plates, a plurality of negative plates, and a plurality of diaphragms, the positive plates and the negative plates are alternately stacked, and at least one diaphragm is disposed between two adjacent plates.
Optionally, the positive current collector consists of a plurality of first positive current collectors, the first positive current collectors are connected to the same end of each positive electrode tab, and all the first positive current collectors are welded to the same surface of the positive electrode tab in a converging manner;
the negative current collector is composed of a plurality of first negative current collectors, the same end of each negative plate is respectively connected with the first negative current collectors, and all the first negative current collectors are welded on the same surface of the negative lug plates in a gathering mode.
Optionally, the overwrap is an aluminum plastic film overwrap.
Optionally, the battery cell is of a square structure.
A lithium ion battery comprising the full tab cell structure as described in any one of the above.
Has the beneficial effects that: the utility model discloses effectively utilize electric core structure, with full utmost point ear structure and coincide, the utilization electrode (mass flow body promptly) size of bigger utility to improve electric core electrode conductivity, reduce the polarization effect that electric core brought at the electrode tip, and then improve electric core electric conductive property and multiplying power performance. Simultaneously, this structure has various utmost point ear end, and utmost point ear deformation maneuverability is higher, and electric core is more nimble in the PACK process, brings better PACK effect, improves electric core effective utilization in the module simultaneously, improves module energy density.
Drawings
Fig. 1 is the utility model provides a pair of full utmost point ear electricity core structure's orthographic view structure schematic diagram.
Fig. 2 is the utility model provides a pair of appearance structure schematic diagram of full utmost point ear electricity core structure.
Fig. 3 is another schematic view of the appearance structure of the full tab electric core structure provided by the present invention.
Fig. 4 is another schematic diagram of the appearance structure of the full tab electric core structure provided by the present invention.
Fig. 5 is a schematic view of another appearance structure of the full tab electric core structure provided by the present invention.
Detailed Description
The utility model provides a full utmost point ear electricity core structure and lithium ion battery, for making the utility model discloses a purpose, technical scheme and effect are clearer, more clear and definite, and is following right the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-5, the present invention provides a full tab electric core structure, which includes: the battery comprises an outer package 1, a battery core 2, a positive current collector 3 and a negative current collector 4 which are respectively connected with two opposite ends of the battery core 2, a positive lug 5 connected with the positive current collector 3, and a negative lug 6 connected with the negative current collector 4;
the battery core 2, the positive current collector 3 and the negative current collector 4 are all packaged in the outer package 1;
the length direction of the positive pole lug 5 is perpendicular to the electric core 2, the width of the positive pole lug 5 is the same as the width of the electric core 2 (the width of the electric core refers to the length of the electric core along the width direction of the positive pole lug), the positive pole lug 5 extends from the inside of the outer package 1 to the outside of the outer package 1 along the length direction, and the packaging area of the positive pole lug 5 is coated with a positive pole lug glue layer 7;
the length direction of the negative pole lug 6 is perpendicular to the electric core 2, the width of the negative pole lug 6 is the same as that of the electric core 2, the negative pole lug 6 extends from the inner part of the outer package 1 to the outer part of the outer package 1 along the length direction, and a negative pole lug glue layer 8 is coated on the packaging area of the negative pole lug 6;
the outer packing 1 is both ends open-ended structure, the one end opening of outer packing 1 passes through anodal ear glue film 7 is sealed, the other end opening of outer packing 1 passes through negative pole ear glue film 8 is sealed.
The utility model discloses a change utmost point auricle position, make utmost point auricle perpendicular with electric core, and through changing utmost point auricle size, make utmost point auricle width unanimous with electric core width, utmost point auricle has bigger welding contact area with the mass flow body of electric core like this, is favorable to improving electric core electric conductive property (low resistance, low impedance, low heat production) to and improve the multiplying power performance of this structure electric core.
In addition, the exposed direction of the tab piece is perpendicular to the battery core, the tab piece has a more flexible deformation mode, and the tab deformation operability is high. Various utmost point ear ends (as shown in fig. 2-5) for electric core is more nimble in the PACK process, is favorable to improving the PACK effect, improves electric core effective utilization in the module simultaneously, improves module energy density.
In one embodiment, one of two ends of the positive electrode lug piece in the length direction extends to the outside of the outer package, and the other end of the positive electrode lug piece extends to be level with the bottom of the battery cell;
one end of the two ends of the negative pole lug piece along the length direction extends out of the external package, and the other end of the negative pole lug piece extends to be parallel to the bottom of the battery cell;
the direction in which the positive electrode tab extends outside the outer package is the same as the direction in which the negative electrode tab extends outside the outer package, as shown in fig. 2.
In one embodiment, the length of the positive electrode tab glue layer 7 in the width direction of the positive electrode tab 5 is the same as the width of the battery cell 2, the positive electrode tab glue layer 7 is symmetrically coated on the first surface and the second surface of the positive electrode tab 5, and the first surface and the second surface are two opposite surfaces of the positive electrode tab 5;
the length of the negative electrode lug glue layer 8 in the width direction of the negative electrode lug 6 is equal to the width of the battery core 2, the negative electrode lug glue layer 8 is symmetrically coated on the first surface and the second surface of the negative electrode lug 6, and the first surface and the second surface are two opposite surfaces of the negative electrode lug 6.
In one embodiment, the thickness of the positive tab adhesive layer on each side is 0.05-0.3mm and the thickness of the negative tab adhesive layer on each side is 0.05-0.3mm. After the thickness range, the electric core has better insulating property, effectively reduces the film voltage of the electric core, weakens the primary battery effect of the inside and the external package of the electric core, has better anti-corrosion property and prolongs the service life of the electric core. Furthermore, the sum of the thicknesses of the positive electrode tab glue layers on the two sides is the same as the sum of the thicknesses of the negative electrode tab glue layers on the two sides.
In one embodiment, the length of the positive electrode tab glue layer along the length direction of the positive electrode tab is 2-10mm, and the length of the negative electrode tab glue layer along the length direction of the negative electrode tab is 2-10mm. Further, the length of the positive electrode tab glue layer along the length direction of the positive electrode tab is the same as the length of the negative electrode tab glue layer along the length direction of the negative electrode tab.
In one embodiment, the cells 2 are in a square configuration (laminated cells), such as a square configuration or a rectangular configuration. Specifically, the battery cell 2 includes a plurality of positive electrode plates 21, a plurality of negative electrode plates 22, and a plurality of separators 23, where the positive electrode plates 21 and the negative electrode plates 22 are alternately stacked, and at least one separator 23 is disposed between two adjacent electrode plates.
In one embodiment, the positive current collector 3 is composed of a plurality of first positive current collectors 31, the first positive current collector 31 is connected to the same end of each positive tab 21, and all the first positive current collectors 31 are welded together on the same surface of the positive tab 5, where 9 is a positive current collector welding zone, and all the first positive current collectors 31 are welded together in the positive current collector welding zone 9, as shown in fig. 1;
the negative current collector 4 is composed of a plurality of first negative current collectors 41, the same end of each negative plate 22 is connected with the first negative current collectors 41, all the first negative current collectors 41 are welded on the same surface of the negative lug 6 in a gathering manner, wherein 10 refers to a negative current collector welding area, and all the first negative current collectors 41 are welded in the negative current collector welding area 10 in a gathering manner, as shown in fig. 1.
In one embodiment, the overwrap is an aluminum plastic film overwrap.
The utility model discloses a change utmost point ear structure (if change utmost point ear direction, utmost point ear welding position, utmost point ear mode of going out), effectively utilize the structure space in the electric core design, promote electric core electric conductive property and multiplying power performance.
The utility model provides a lithium ion battery, wherein, include as above arbitrary the full utmost point ear electricity core structure.
To sum up, the utility model provides a pair of full utmost point ear electricity core structure and lithium ion battery, the utility model discloses a change utmost point auricle position, make utmost point auricle perpendicular with electric core, electric core utmost point auricle welding, expose the direction and refer to full utmost point ear electricity core structure picture, among this full utmost point ear electricity core structure, utmost point auricle and the mass flow body has bigger area of welding contact to improve electric core electric conductive property and multiplying power performance. Meanwhile, the exposed direction of the tab piece is perpendicular to the battery core, and the tab piece has a more flexible deformation mode. Various utmost point ear end for electric core is more nimble in the PACK process, and the PACK effect is better, improves electric core effective utilization and module energy density in the module simultaneously.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a full utmost point ear electricity core structure which characterized in that includes: the battery comprises an outer package, a battery cell, a positive current collector and a negative current collector which are respectively connected with the opposite two ends of the battery cell, a positive lug connected with the positive current collector, and a negative lug connected with the negative current collector;
the battery core, the positive current collector and the negative current collector are all packaged in the outer package;
the length direction of the positive lug is perpendicular to the battery cell, the width of the positive lug is the same as that of the battery cell, the positive lug extends from the inside of the outer package to the outside of the outer package along the length direction, and a positive lug glue layer is coated on the packaging area of the positive lug;
the length direction of the negative pole lug piece is perpendicular to the battery cell, the width of the negative pole lug piece is the same as that of the battery cell, the negative pole lug piece extends from the inside of the outer package to the outside of the outer package along the length direction, and a negative pole lug glue layer is coated on the packaging area of the negative pole lug piece;
the extranal packing is both ends open-ended structure, the one end opening of extranal packing passes through positive pole ear glue film is sealed, the other end opening of extranal packing passes through negative pole ear glue film is sealed.
2. The full-tab cell structure according to claim 1, wherein one of the two ends of the positive electrode tab in the length direction extends out of the outer package, and the other end extends to be flush with the bottom of the cell;
one end of the two ends of the negative pole lug piece along the length direction extends to the outside of the outer package, and the other end of the negative pole lug piece extends to be level with the bottom of the battery cell.
3. The full-tab battery cell structure according to claim 1, wherein the length of the positive tab adhesive layer in the width direction of the positive tab is the same as the width of the battery cell, the positive tab adhesive layer is symmetrically coated on the first surface and the second surface of the positive tab, and the first surface and the second surface are two opposite surfaces of the positive tab;
the length of the negative pole lug glue layer in the width direction of the negative pole lug is the same as the width of the battery cell, the first surface and the second surface of the negative pole lug are symmetrically coated with the negative pole lug glue layer, and the first surface and the second surface are two opposite surfaces of the negative pole lug.
4. The full tab cell structure of claim 3, wherein the thickness of the positive tab glue layer on each side is 0.05-0.3mm, and the thickness of the negative tab glue layer on each side is 0.05-0.3mm.
5. The full-tab battery cell structure of claim 1, wherein the length of the positive tab adhesive layer along the length direction of the positive tab is 2-10mm, and the length of the negative tab adhesive layer along the length direction of the negative tab is 2-10mm.
6. The full-tab cell structure of claim 1, wherein the cell body comprises a plurality of positive plates, a plurality of negative plates and a plurality of diaphragms, the positive plates and the negative plates are alternately stacked, and at least one diaphragm is arranged between two adjacent plates.
7. The full tab cell structure of claim 6, wherein the positive current collector consists of a plurality of first positive current collectors, the first positive current collectors are connected to the same end of each positive tab, and all the first positive current collectors are welded to the same surface of the positive tab in a gathering manner;
the negative current collector is composed of a plurality of first negative current collectors, the same end of each negative plate is respectively connected with the first negative current collectors, and all the first negative current collectors are welded on the same surface of the negative lug plates in a gathering mode.
8. The full tab cell structure of claim 1, wherein the outer package is an aluminum plastic film outer package.
9. The full tab cell structure of claim 1, wherein the cells are in a square configuration.
10. A lithium ion battery comprising the full tab cell structure of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221917511.6U CN218160737U (en) | 2022-07-21 | 2022-07-21 | Full utmost point ear electricity core structure and lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221917511.6U CN218160737U (en) | 2022-07-21 | 2022-07-21 | Full utmost point ear electricity core structure and lithium ion battery |
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| CN218160737U true CN218160737U (en) | 2022-12-27 |
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| CN202221917511.6U Active CN218160737U (en) | 2022-07-21 | 2022-07-21 | Full utmost point ear electricity core structure and lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116544626A (en) * | 2023-07-03 | 2023-08-04 | 上海瑞浦青创新能源有限公司 | energy storage device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116544626A (en) * | 2023-07-03 | 2023-08-04 | 上海瑞浦青创新能源有限公司 | energy storage device |
| CN116544626B (en) * | 2023-07-03 | 2023-10-20 | 上海瑞浦青创新能源有限公司 | energy storage device |
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