CN212810488U - Laminated multi-tab battery cell and battery - Google Patents
Laminated multi-tab battery cell and battery Download PDFInfo
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- CN212810488U CN212810488U CN202021031349.9U CN202021031349U CN212810488U CN 212810488 U CN212810488 U CN 212810488U CN 202021031349 U CN202021031349 U CN 202021031349U CN 212810488 U CN212810488 U CN 212810488U
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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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- 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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Abstract
The utility model belongs to the technical field of the battery, especially, relate to a lamination formula multi-tab electricity core, include: the first anode sheet comprises a first anode extending empty foil area, and an anode tab is welded on the first anode extending empty foil area; the first cathode sheet is arranged on one side of the first anode sheet and comprises a first cathode extension empty foil area, and a cathode tab is welded on the first cathode extension empty foil area; the second cathode sheet is arranged on the other side of the first anode sheet and comprises a second cathode extension empty foil area; the second anode sheet is arranged on one outward side of the first cathode sheet and the second cathode sheet and comprises a second anode extending empty foil area; the third cathode sheet is arranged on the outward side of the second anode sheet and comprises a third cathode extension empty foil area; and the diaphragm is arranged between the two adjacent pole pieces at intervals. The utility model discloses still relate to a lamination formula multi-tab battery. Compared with the prior art, the utility model discloses not only preparation simple process and yield are high, have the excellent performance that low impedance and high rate charge moreover.
Description
Technical Field
The utility model belongs to the technical field of the battery, especially, relate to a lamination formula multi-tab electricity core and battery.
Background
The soft package lithium ion battery has the advantages of high energy density, small self-discharge, wide working temperature range, no environmental pollution and the like, and is widely applied to various digital products and mobile equipment. With the update of products, electronic products, especially portable mobile communication tools, have been reformed from simple text and voice communication to communication tools and entertainment equipment integrating text, voice, image, video and other information and multimedia, and the functions of electronic products are continuously improved and increased, so that the power consumption of electronic products is also continuously increased. The polymer lithium ion battery is used as the most commonly used power source of electronic products, and more severe requirements are provided on the endurance mileage and the charging speed.
In consideration of both the quick charge performance and the energy density, the commercial flexible-package lithium ion battery generally adopts a structure with a centrally-arranged lead-out lug under the condition of low charge rate requirement, and adopts a structure with multiple lugs under the condition of particularly high charge rate requirement to reduce the impedance and improve the charge speed; however, the process difficulty becomes difficult in both a winding type multi-tab structure and a lamination type multi-tab structure, and particularly in the packaging of the multi-tab in a flexible package battery, the in-line packaging of the tabs wastes huge internal space and loses energy density; and the packaging is carried out after the tab is bent, so that precise tab bending and positioning equipment needs to be introduced for tab bending and packaging, the process difficulty is high, and the defective products caused by the process are usually very high.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the utility model lies in: aiming at the defects of the prior art, the laminated multi-tab battery cell is provided, and has excellent performances of low impedance and high-rate charging.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a laminated multi-tab cell comprising:
the first anode sheet comprises an anode tab welding empty foil area and a first anode extending empty foil area, wherein the anode tab welding empty foil area is welded with an anode tab;
the first cathode sheet is arranged on one side of the first anode sheet and comprises a cathode tab welding empty foil area and a first cathode extending empty foil area, a cathode tab is welded in the cathode tab welding empty foil area, and a first protective adhesive is adhered to the position, corresponding to the anode tab welding empty foil area, of the first cathode sheet;
the second cathode sheet is arranged on the other side of the first anode sheet and comprises a second cathode extension empty foil area, the second cathode extension empty foil area is arranged corresponding to the first cathode extension empty foil area, and a second protective adhesive is adhered to the position of the second cathode sheet corresponding to the anode tab welding empty foil area;
the second anode sheet is arranged on one outward side of the first cathode sheet and the second cathode sheet and comprises a second anode extending empty foil area which is arranged corresponding to the first anode extending empty foil area;
the third cathode sheet is arranged on the outward side of the second anode sheet and comprises a third cathode extending empty foil area which is arranged corresponding to the first cathode extending empty foil area or the second cathode extending empty foil area;
and the diaphragms are arranged between the two adjacent pole pieces at intervals.
As an improvement of the laminated multi-tab cell of the present invention, the second anode strip and the third cathode strip are provided in plurality, and the second anode strip and the third cathode strip are alternately arranged.
As an improvement of the laminated multi-tab cell of the present invention, the first anode strips are disposed on both sides of the second anode strips in different quantities, or the first anode strips are disposed on both sides of the third cathode strips in different quantities.
As an improvement of the laminated multi-tab cell, the thickness of the current collector of the first anode plate is greater than the thickness of the current collector of the second anode plate.
As an improvement of the laminated multi-tab cell of the present invention, the thickness of the current collector of the first cathode plate is greater than that of the current collector of the second cathode plate; the thickness of the current collector of the first cathode plate is larger than that of the current collector of the third cathode plate.
As an improvement of the laminated multi-tab battery cell of the present invention, the anode tab and the first anode extended foil area are respectively led out from two opposite ends of the first anode sheet; the cathode tab and the first cathode extension empty foil area are respectively led out from two opposite ends of the first cathode sheet.
As an improvement of lamination formula multi-tab electricity core, first positive pole extends empty paper tinsel district and is provided with at least two, first negative pole extends empty paper tinsel district and also is provided with at least two, just first negative pole extend empty paper tinsel district with first positive pole extends empty paper tinsel district contactless.
As an improvement of lamination formula multi-tab electricity core, the empty paper tinsel district of positive pole utmost point ear welding with the degree of depth in the empty paper tinsel district of negative pole utmost point ear welding is H, H is more than or equal to 1 mm.
The utility model discloses a second of purpose lies in: the laminated multi-tab battery comprises a packaging bag and the laminated multi-tab battery cell in any section in the specification, wherein the anode tab and the cathode tab are led out of the packaging bag; the first anode extension empty foil area and the second anode extension empty foil area are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell; the first cathode extension empty foil area, the second cathode extension empty foil area and the third cathode extension empty foil area are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell.
As an improvement of the laminated multi-tab battery of the present invention, a plurality of the second anode extended empty foil areas and the first anode extended empty foil areas are welded together and folded at the bottom of the laminated multi-tab battery cell after being insulated and coated; the third cathode extension empty foil areas, the first cathode extension empty foil areas and the second cathode extension empty foil areas are welded into a whole, insulated and coated, and then folded at the bottom of the laminated multi-tab battery core.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
1) the utility model discloses set up the empty paper tinsel district of extension at each positive pole piece and negative pole piece, weld the empty paper tinsel district of extension of each positive pole piece as an organic whole and carry out insulating cladding, weld the empty paper tinsel district of extension of each negative pole piece as an organic whole and carry out insulating cladding, fold again in the bottom of lamination formula multi-tab electric core at last, realized the multi-tab structure for electric core has the excellent performance that low impedance and high rate charge.
2) The utility model discloses draw forth positive pole utmost point ear and negative pole utmost point ear on first positive pole piece and first negative pole piece respectively, because of utmost point ear drawing mode is the same with conventional soft-packing electricity core, consequently adopt conventional encapsulation technology can encapsulate the shaping, need not introduce the adjustment of technology and the transformation of encapsulation equipment. Compared with the mode that the metal strap lugs are welded to the multilayer hollow foils and then are led out in an in-line mode, the utility model obviously improves the utilization of the internal space of the battery and improves the energy density of the battery core; compare and draw forth in the mode that the utmost point ear is rolled over to rethread behind the empty paper tinsel of multilayer in strap utmost point ear welding, the utility model discloses do not need complicated book utmost point ear technology and the introduction of rolling over utmost point ear equipment, reduced the cost of manufacture and improved the preparation yield.
Drawings
Fig. 1 is a schematic structural diagram of a laminated multi-tab cell in embodiments 1 and 3.
Fig. 2 is a schematic structural view of the first anode sheet in examples 1 and 3.
Fig. 3 is a schematic structural view of the second anode sheet in examples 1 and 3.
Fig. 4 is a schematic structural view of the first cathode sheet in examples 1 and 3.
Fig. 5 is a schematic structural view of a second cathode sheet in examples 1 and 3.
Fig. 6 is a schematic structural view of a third cathode sheet in examples 1 and 3.
Fig. 7 is a schematic structural diagram of a laminated multi-tab cell in embodiment 2.
Fig. 8 is a schematic structural view of the first anode sheet in example 2.
Fig. 9 is a schematic structural view of a second anode sheet in example 2.
Fig. 10 is a schematic structural view of the first cathode sheet in example 2.
Fig. 11 is a schematic structural view of a second cathode sheet in example 2.
Fig. 12 is a schematic structural view of a third cathode sheet in example 2.
Fig. 13 is a structural schematic view of the laminated multi-tab battery in examples 4 and 6.
Fig. 14 is a structural schematic view of a laminated multi-tab battery in example 5.
Wherein: 100-battery core, 200-anode tab, 300-cathode tab, 400-packaging bag, 1-first anode sheet, 2-second anode sheet, 3-first cathode sheet, 4-second cathode sheet, 5-third cathode sheet, 11-anode tab welding empty foil area, 12-first anode extending empty foil area, 21-second anode extending empty foil area, 31-cathode tab welding empty foil area, 32-first cathode extending empty foil area, 33-first protection glue, 41-second cathode extending empty foil area, 42-second protection glue, and 51-third cathode extending empty foil area.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.
Example 1
Referring to fig. 1 to 6, this embodiment provides a lamination formula multi-tab electric core, includes:
the first anode sheet 1 comprises an anode tab welding empty foil area 11 and a first anode extending empty foil area 12, wherein an anode tab 200 is welded in the anode tab welding empty foil area 11;
the first cathode sheet 3 is arranged on one side of the first anode sheet 1 and comprises a cathode tab welding empty foil area 31 and a first cathode extension empty foil area 32, the cathode tab welding empty foil area 31 is welded with a cathode tab 300, and a first protective adhesive 33 is adhered to the position of the first cathode sheet 3 corresponding to the anode tab welding empty foil area 11;
the second cathode sheet 4 is arranged on the other side of the first anode sheet 1 and comprises a second cathode extension empty foil area 41, the second cathode extension empty foil area 41 is arranged corresponding to the first cathode extension empty foil area 32, and a second protective adhesive 42 is adhered to the position of the second cathode sheet 4 corresponding to the anode tab welding empty foil area 11;
the second anode sheet 2 is arranged on one outward side of the first cathode sheet 3 and the second cathode sheet 4 and comprises a second anode extending empty foil area 21 which is arranged corresponding to the first anode extending empty foil area 12;
the third cathode sheet 5 is arranged on the outward side of the second anode sheet 2 and comprises a third cathode extension empty foil area 51 which is arranged corresponding to the first cathode extension empty foil area 32 or the second cathode extension empty foil area 41;
and the diaphragms are arranged between the two adjacent pole pieces at intervals.
In the present embodiment, the thickness of the current collector of the first anode sheet 1 is greater than that of the current collector of the second anode sheet 2; the thickness of the current collector of the first cathode plate 3 is larger than that of the current collector of the second cathode plate 4; the thickness of the current collector of the first cathode sheet 3 is greater than that of the current collector of the third cathode sheet 5. The current collector thickness that first anode strip 1 and first negative pole piece 3 were used is thicker than the current collector of other pole pieces, is favorable to increasing the area of overflowing, reduces the battery and generates heat.
In the present embodiment, the anode tab 200 and the first anode extension empty foil region 12 are respectively led out from two opposite ends of the first anode sheet 1; the cathode tab 300 and the first cathode extension empty foil area 32 are respectively led out from two opposite ends of the first cathode sheet 3.
In the embodiment, the depth of the anode tab welding empty foil area 11 and the cathode tab welding empty foil area 31 is H, and H is more than or equal to 1 mm. The depth of the anode tab welding empty foil area 11 is only required to ensure the welding reliability of the anode tab 200, and the anode tab welding empty foil area 11 may be disposed in the width direction of the first anode sheet 1 in a penetrating manner. Similarly, the depth of the cathode tab welding empty foil region 31 may be sufficient to ensure the welding reliability of the cathode tab 300, and the cathode tab welding empty foil region 31 may be provided to penetrate in the width direction of the first cathode sheet 3.
Example 2
Referring to fig. 7 to 12, the present embodiment provides a laminated multi-tab battery cell, which is different from embodiment 1 in that: there are two first anode extending empty foil areas 12, there are two first cathode extending empty foil areas 32, and the first cathode extending empty foil areas 32 are not in contact with the first anode extending empty foil areas 12. Correspondingly, two second anode extending empty foil areas 21, two second cathode extending empty foil areas 41 and two third cathode extending empty foil areas 51 are arranged, and are arranged in one-to-one correspondence.
The rest is the same as embodiment 1, and the description is omitted here.
Example 3
The embodiment provides a laminated multi-tab battery cell, which is different from embodiment 1 in that: the second anode strips 2 and the third cathode strips 5 are provided in plurality, the second anode strips 2 and the third cathode strips 5 are alternately arranged, and the number of the second anode strips 2 on both sides of the first anode strip 1 is different, or the number of the third cathode strips 5 on both sides of the first anode strip 1 is different. I.e. the first anode sheet 1 is not in the central position of the laminated multi-tab cell.
The rest is the same as embodiment 1, and the description is omitted here.
Example 4
Referring to fig. 13, the present embodiment provides a laminated multi-tab battery, which includes an encapsulation bag 400 and the laminated multi-tab battery cell 100 described in embodiment 1, wherein an anode tab 200 and a cathode tab 300 are led out of the encapsulation bag 400; the second anode extension empty foil area 21 and the first anode extension empty foil area 12 are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell 100; the third cathode extending empty foil area 51, the first cathode extending empty foil area 32 and the second cathode extending empty foil area 41 are welded into a whole, insulated and coated, and then folded at the bottom of the laminated multi-tab battery cell 100.
Example 5
Referring to fig. 14, the present embodiment provides a laminated multi-tab battery, which includes an encapsulation bag 400 and the laminated multi-tab battery cell 100 described in embodiment 2, wherein an anode tab 200 and a cathode tab 300 are led out of the encapsulation bag 400; the second anode extension empty foil area 21 and the first anode extension empty foil area 12 are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell 100; the third cathode extending empty foil area 51, the first cathode extending empty foil area 32 and the second cathode extending empty foil area 41 are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell 100.
Example 6
Referring to fig. 13, the present embodiment provides a laminated multi-tab battery, which includes a package 400 and the laminated multi-tab battery cell 100 described in embodiment 3, wherein an anode tab 200 and a cathode tab 300 are led out of the package 400; the plurality of second anode extension empty foil areas 21 and the first anode extension empty foil area 12 are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery core 100; the plurality of third cathode extending empty foil areas 51, the first cathode extending empty foil area 32 and the second cathode extending empty foil area 41 are welded into a whole, and are folded and packaged at the bottom of the laminated multi-tab battery core 100 after being insulated and coated.
While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed above, or as otherwise known in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.
Claims (10)
1. The utility model provides a lamination formula multi-tab electricity core which characterized in that includes:
the first anode sheet comprises an anode tab welding empty foil area and a first anode extending empty foil area, wherein the anode tab welding empty foil area is welded with an anode tab;
the first cathode sheet is arranged on one side of the first anode sheet and comprises a cathode tab welding empty foil area and a first cathode extending empty foil area, a cathode tab is welded in the cathode tab welding empty foil area, and a first protective adhesive is adhered to the position, corresponding to the anode tab welding empty foil area, of the first cathode sheet;
the second cathode sheet is arranged on the other side of the first anode sheet and comprises a second cathode extension empty foil area, the second cathode extension empty foil area is arranged corresponding to the first cathode extension empty foil area, and a second protective adhesive is adhered to the position of the second cathode sheet corresponding to the anode tab welding empty foil area;
the second anode sheet is arranged on one outward side of the first cathode sheet and the second cathode sheet and comprises a second anode extending empty foil area which is arranged corresponding to the first anode extending empty foil area;
the third cathode sheet is arranged on the outward side of the second anode sheet and comprises a third cathode extending empty foil area which is arranged corresponding to the first cathode extending empty foil area or the second cathode extending empty foil area;
and the diaphragms are arranged between the two adjacent pole pieces at intervals.
2. The laminated multi-tab cell of claim 1, wherein: the second anode sheet and the third cathode sheet are provided with a plurality of anode sheets and a plurality of cathode sheets, and the second anode sheets and the third cathode sheets are alternately arranged.
3. The laminated multi-tab cell of claim 2, wherein: the number of the second anode strips on two sides of the first anode strip is different, or the number of the third cathode strips on two sides of the first anode strip is different.
4. The laminated multi-tab cell of claim 1, wherein: the thickness of the current collector of the first anode sheet is larger than that of the current collector of the second anode sheet.
5. The laminated multi-tab cell of claim 1, wherein: the thickness of the current collector of the first cathode plate is larger than that of the current collector of the second cathode plate; the thickness of the current collector of the first cathode plate is larger than that of the current collector of the third cathode plate.
6. The laminated multi-tab cell of claim 1, wherein: the anode tab and the first anode extension empty foil area are respectively led out from two opposite ends of the first anode sheet; the cathode tab and the first cathode extension empty foil area are respectively led out from two opposite ends of the first cathode sheet.
7. The laminated multi-tab cell of claim 1, wherein: the number of the first anode extending empty foil areas is at least two, the number of the first cathode extending empty foil areas is also at least two, and the first cathode extending empty foil areas are not in contact with the first anode extending empty foil areas.
8. The laminated multi-tab cell of claim 1, wherein: the depth of the anode tab welding empty foil area and the cathode tab welding empty foil area is H, and H is larger than or equal to 1 mm.
9. The utility model provides a lamination formula multi-tab battery which characterized in that: the laminated multi-tab battery cell comprises a packaging bag and the laminated multi-tab battery cell as claimed in any one of claims 1 to 8, wherein the anode tab and the cathode tab are led out of the packaging bag; the first anode extension empty foil area and the second anode extension empty foil area are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell; the first cathode extension empty foil area, the second cathode extension empty foil area and the third cathode extension empty foil area are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell.
10. The laminated multi-tab battery of claim 9, wherein: the second anode extension empty foil area and the plurality of first anode extension empty foil areas are welded into a whole, insulated, coated and folded at the bottom of the laminated multi-tab battery cell; the third cathode extension empty foil areas, the first cathode extension empty foil areas and the second cathode extension empty foil areas are welded into a whole, insulated and coated, and then folded at the bottom of the laminated multi-tab battery core.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020209526102 | 2020-05-29 | ||
| CN202020952610 | 2020-05-29 |
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| CN212810488U true CN212810488U (en) | 2021-03-26 |
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| CN202021031349.9U Active CN212810488U (en) | 2020-05-29 | 2020-06-08 | Laminated multi-tab battery cell and battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204105A (en) * | 2021-11-10 | 2022-03-18 | 安徽南都华拓新能源科技有限公司 | Soft-packaged novel laminated lithium ion battery |
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2020
- 2020-06-08 CN CN202021031349.9U patent/CN212810488U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114204105A (en) * | 2021-11-10 | 2022-03-18 | 安徽南都华拓新能源科技有限公司 | Soft-packaged novel laminated lithium ion battery |
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