CN113299879A - Soft package square battery electrode structure, battery, electronic equipment and preparation process - Google Patents
Soft package square battery electrode structure, battery, electronic equipment and preparation process Download PDFInfo
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- CN113299879A CN113299879A CN202110675216.8A CN202110675216A CN113299879A CN 113299879 A CN113299879 A CN 113299879A CN 202110675216 A CN202110675216 A CN 202110675216A CN 113299879 A CN113299879 A CN 113299879A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
Abstract
The invention discloses an electrode structure of a soft package square battery, relates to the technical field of soft package batteries, and solves the technical problem of the defects of electrode structures of wound and laminated lithium ion batteries in the related technology. In this structure, the empty paper tinsel district of positive pole sets up along a long limit of positive plate, the empty paper tinsel district of negative pole sets up along a long limit of negative plate, the positive plate, diaphragm and negative plate are convoluteed according to the preface and are formed roll core, the empty paper tinsel district of positive pole and the empty paper tinsel district of negative pole do not are located the both ends of rolling up the core, the empty paper tinsel district of positive pole is kneaded and is fused into the empty paper tinsel of positive pole and fuses the district along the range upon range of direction of rolling up the core, the empty paper tinsel district of negative pole is fused into through kneading and is fused to the empty paper tinsel district of negative pole along the range upon range of direction of rolling up the core, anodal utmost point ear and the empty paper tinsel of positive pole fuse the district welding, negative pole utmost point ear and the empty paper tinsel of negative pole fuse the district welding. The structure integrates the advantages of winding and lamination, belongs to a battery structure with lugs at two ends, has high production efficiency and better product consistency of a winding type battery, and can achieve the high power output performance of a laminated type battery.
Description
Technical Field
The invention relates to the technical field of soft package batteries, in particular to an electrode structure of a soft package square battery, a battery, electronic equipment and a preparation process.
Background
Soft package lithium ion battery is the lithium ion battery of a common type among the lithium ion battery, and soft package lithium ion battery divide into soft package lithium ion battery of square and cylinder, and square soft package lithium ion battery can divide into coiling formula structure and lamination formula structure again from structural the branch.
As shown in fig. 1, the electrode structure of the wound lithium ion battery: the positive and negative electrode plates 10 are respectively rectangular, positive and negative electrode tabs 20 are respectively welded on a hollow foil area reserved on the electrode plates, and the positive and negative electrode plates 10 are separated by a diaphragm and wound into a battery cell in a winding mode. The coiled lithium ion battery has the advantages of high production efficiency and better quality consistency; the defects are that the discharge multiplier rate is poor, the high-power output is limited, and the defect of using the device on products requiring high-power output such as unmanned planes, electric tools and the like is obvious.
As shown in fig. 2, the laminated lithium ion battery electrode structure: the positive and negative electrodes are respectively provided with a plurality of small pieces, each small piece extends out of a rectangular current collector, the small pieces (pole pieces 10) of the positive and negative electrodes are separated through a diaphragm and folded together to form a roll core, the current collectors extending out of the positive electrode are overlapped together and welded with a positive electrode lug 20, and the current collectors extending out of the negative electrode are overlapped together and welded with a negative electrode lug 20. The laminated lithium ion battery has the advantages of good discharge rate, high-power output and high discharge platform; the defects are that the production efficiency is low, the consistency of the battery is poor, the advantages in production cost are lacked, meanwhile, the self-discharge is large, and the use of the battery on products with high quality requirements is limited.
Disclosure of Invention
The application provides a soft-packaged square battery electrode structure, has improved the technical problem of the defect of coiling formula lithium ion battery electrode structure and the defect of lamination formula lithium ion battery electrode structure among the correlation technique.
The utility model provides a soft packet of square battery electrode structure, including the positive plate, the negative pole piece, anodal utmost point ear and negative pole utmost point ear, the positive plate is equipped with the empty foil district of anodal, the empty foil district of anodal sets up along a long limit of positive plate, the negative pole piece is equipped with the empty foil district of negative pole, the empty foil district of negative pole sets up along a long limit of negative pole piece, the positive plate, diaphragm and negative pole piece are convoluteed according to the preface and are formed roll up the core, the empty foil district of anodal and the empty foil district of negative pole are located the both ends of rolling up the core respectively, the empty foil district of anodal stacking direction along rolling up the core is disposed and is kneaded through the ultrasonic wave method and fuse into the empty foil fusion district of positive pole, the empty foil district welding of anodal utmost point ear and the empty foil of negative pole, the empty foil fusion district welding of negative pole utmost point ear and negative pole.
Optionally, the material of the positive plate is one of lithium cobaltate, ternary lithium nickel cobalt manganese oxide and lithium manganese oxide.
Optionally, the negative electrode plate is made of one of lithium titanate, graphite and a silicon-carbon material.
Optionally, the fusion area of the positive electrode tab and the positive electrode empty foil and the fusion area of the negative electrode tab and the negative electrode empty foil adopt ultrasonic welding or laser welding.
Optionally, the positive electrode tab and the negative electrode tab are symmetrically arranged at two ends of the winding core.
Soft square lithium electronic battery of package includes:
the electrode structure of the soft-package square battery is described above;
an electrolyte; and
and the packaging film is used for packaging the winding core and accommodating the electrolyte so that the electrolyte infiltrates the positive plate and the negative plate of the winding core.
Alternatively, the electrolyte is composed of a fluorine-containing lithium salt and an organic solvent.
Optionally, the material adopted by the packaging film is an aluminum plastic film.
The electronic equipment comprises the soft-packaged square lithium electronic battery.
The preparation technology of the electrode structure of the soft package square battery is used for manufacturing the electrode structure of the soft package square battery and comprises the following steps:
designing a positive plate and a negative plate;
the positive plate, the diaphragm and the negative plate are sequentially wound to form a winding core, and the positive empty foil area and the negative empty foil area are respectively positioned at two ends of the winding core;
kneading and fusing the positive electrode empty foil area together by adopting an ultrasonic method to form a positive electrode empty foil fusion area, and then welding the positive electrode empty foil fusion area with a positive electrode tab;
kneading and fusing the negative electrode empty foil area together by adopting an ultrasonic method to form a negative electrode empty foil fusion area, and then welding the negative electrode empty foil fusion area with a negative electrode tab.
The beneficial effect of this application is as follows: the utility model provides a soft packet of square battery electrode structure, structure through the adjustment coiling type pole piece, at the positive plate, diaphragm and negative pole piece are convoluteed according to the preface and are formed after rolling up the core, knead to merge through the ultrasonic wave method and just, the empty paper tinsel of negative pole fuses the district, respectively with just, negative pole utmost point ear is connected, make the pole piece have more regions and utmost point ear welding together, form a plurality of tie points, the tie point reaches the tie point of lamination, thereby reach the connection effect of the utmost point ear of similar lamination battery structure and pole piece, thereby the soft packet of square battery electrode structure of this application has synthesized the advantage of coiling and lamination, belong to the battery structure of both ends play utmost point ear, both have the high production efficiency and better product uniformity of coiling type battery, can reach the high power output performance of lamination type battery again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
FIG. 1 is a schematic diagram of a prior art electrode structure for a wound lithium ion battery;
FIG. 2 is a schematic diagram of a prior art electrode structure of a laminated lithium ion battery;
fig. 3 is a schematic diagram of an empty foil region of a pole piece in a soft-package square battery electrode structure provided in the present application;
fig. 4 is a schematic diagram of a positive plate, a diaphragm and a negative plate in the electrode structure of the soft-package square battery provided by the present application after being sequentially wound to form a roll core;
fig. 5 is an overall structure schematic diagram of a connection between a tab and a pole piece empty foil fusion area of the electrode structure of the soft-package square battery provided by the application.
The attached drawings are marked as follows: 10-pole piece, 110-pole piece empty foil area, 111-positive pole empty foil area, 112-negative pole empty foil area, 20-pole lug, 210-positive pole lug, 220-negative pole lug, 30-winding core, 310-positive pole empty foil fusion area and 320-negative pole empty foil fusion area.
Detailed Description
The embodiment of the application improves the technical problems of the defects of the electrode structure of the winding type lithium ion battery and the defects of the electrode structure of the laminated type lithium ion battery in the related technology by providing the electrode structure of the soft-package square battery.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
soft packet of square battery electrode structure, including the positive plate, the negative pole piece, anodal utmost point ear and negative pole utmost point ear, the positive plate is equipped with the empty paper tinsel district of anodal, the empty paper tinsel district of anodal sets up along a long limit of positive plate, the negative pole piece is equipped with the empty paper tinsel district of negative pole, the empty paper tinsel district of negative pole sets up along a long limit of negative pole piece, the positive plate, diaphragm and negative pole piece are convoluteed according to the preface and are formed the book core, the empty paper tinsel district of anodal and the empty paper tinsel district of negative pole are located the both ends of rolling up the core respectively, the empty paper tinsel district of anodal range upon range of direction along rolling up the core is disposed and is kneaded through the ultrasonic wave method and fuse into the empty paper tinsel district of negative pole, anodal utmost point ear and the empty paper tinsel district welding of anod.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example 1
The embodiment provides soft packet of square battery electrode structure, including positive plate, negative pole piece, anodal utmost point ear 210 and negative pole utmost point ear 220, the positive plate is equipped with the empty paper tinsel district 111 of anodal, and the empty paper tinsel district 111 of anodal sets up along a long limit of positive plate, and the negative pole piece is equipped with the empty paper tinsel district 112 of negative pole, and the empty paper tinsel district 112 of negative pole sets up along a long limit of negative pole piece. As shown in fig. 3, fig. 3 shows that the pole piece empty foil area 110 is arranged on one long side of the pole piece 10, the pole piece 10 includes a positive pole piece and a negative pole piece, and the corresponding pole piece empty foil area 110 is a positive pole empty foil area 111 and a negative pole empty foil area 112.
The positive electrode sheet, the separator and the negative electrode sheet are sequentially wound to form a winding core 30, and as shown in fig. 4, a positive electrode empty foil region 111 and a negative electrode empty foil region 112 are respectively located at both ends of the winding core 30.
Referring to fig. 5, the positive electrode empty foil region 111 is disposed along the stacking direction of the winding core 30 and ultrasonically kneaded and fused into a positive electrode empty foil fusion region 310, the negative electrode empty foil region 112 is disposed along the stacking direction of the winding core 30 and ultrasonically kneaded and fused into a negative electrode empty foil fusion region 320, the positive electrode tab 210 is welded to the positive electrode empty foil fusion region 310, and the negative electrode tab 220 is welded to the negative electrode empty foil fusion region 320.
By adjusting the structure of the winding type pole piece 10, after the positive pole piece, the diaphragm and the negative pole piece are sequentially wound to form a winding core 30, the positive and negative empty foil fusion area 320 and the negative empty foil fusion area 220 formed by kneading and fusing through an ultrasonic method are respectively connected with the positive and negative pole tabs 220, so that more areas of the pole piece 10 are welded with the pole tabs 20 to form a plurality of connection points, and the number of the connection points reaches the number of the connection points of the laminated structure, thereby achieving the connection effect of the pole tabs 20 and the pole piece 10 of a similar laminated battery structure. Therefore, the electrode structure of the soft-package square battery integrates the advantages of winding and lamination, has the high production efficiency and good product consistency of a winding type battery, and can also achieve the high power output performance of a lamination type battery.
It is emphasized that in the soft-packed square battery electrode structure of the present embodiment, only a single positive electrode tab and a single negative electrode tab need to be provided.
The positive electrode empty foil area 111 and the negative electrode empty foil area 112 form a stacking effect along the stacking direction of the winding core 30, and the heat area is accurately controlled by kneading with an ultrasonic method, so that the method is suitable for the field of batteries.
Optionally, in this embodiment, the material of the positive electrode plate may be one of lithium cobaltate, ternary lithium nickel cobalt manganese oxide, and lithium manganese oxide. Optionally, the material of the negative electrode plate may be one of lithium titanate, graphite, and a silicon-carbon material. Optionally, the material of the membrane may be one of polyethylene, polypropylene, and a coated membrane.
Optionally, ultrasonic welding or laser welding is adopted in the fusion area 310 of the positive electrode tab 210 and the positive electrode empty foil and the fusion area 320 of the negative electrode tab 220 and the negative electrode empty foil, so that the mounting of the tabs 20 can be realized.
Alternatively, as shown in fig. 5, the positive electrode tab 210 and the negative electrode tab 220 are symmetrically disposed at both ends of the winding core 30.
Example 2
This example provides a process for preparing an electrode structure of a pouch square battery, which is described in conjunction with the electrode structure of the pouch square battery in example 1.
Specifically, the preparation process of the electrode structure of the pouch square battery in this embodiment is used for manufacturing the electrode structure of the pouch square battery in embodiment 1, and includes:
designing a positive plate and a negative plate, specifically, manufacturing the pole piece 10 shown in fig. 3, wherein a positive empty foil area 111 is arranged along one long edge of the positive plate, and a negative empty foil area 112 is arranged along one long edge of the negative plate for use in the following steps;
the positive plate, the diaphragm and the negative plate are sequentially wound to form a winding core 30, and the positive empty foil area 111 and the negative empty foil area 112 are respectively positioned at two ends of the winding core 30, as shown in fig. 4;
kneading and fusing the positive electrode empty foil area 111 together by adopting an ultrasonic method to form a positive electrode empty foil fusion area 310, and then welding the positive electrode empty foil fusion area with the positive electrode tab 210;
kneading and fusing the negative empty foil area 112 together by adopting an ultrasonic method to form a negative empty foil fusion area 320, and then welding the negative empty foil fusion area with the negative tab 220;
the bare cell formed after the tab 20 is welded is manufactured into a finished battery, and the advantages of embodiment 1, namely the advantages of winding and lamination, are integrated, so that the winding type battery has high production efficiency and good product consistency, and the high power output performance of the laminated battery can be achieved.
Example 3
The embodiment provides a soft-package square lithium ion battery, including electrolyte, packaging film and the soft-package square battery electrode structure who adopts embodiment 1, the packaging film is used for the encapsulation to roll up core 30 and holds electrolyte so that the positive plate and the negative plate of core 30 are rolled up in the infiltration of electrolyte. The electrode structure of the soft-package square battery in the embodiment 1 is adopted, the soft-package square lithium electronic battery also integrates the advantages of winding and lamination, the high production efficiency and the good product consistency of a winding type battery are achieved, and the high power output performance of the lamination type battery can be achieved.
Wherein the electrolyte consists of fluorine-containing lithium salt and an organic solvent.
Optionally, the packaging film is made of an aluminum plastic film and has the damage-proof performance.
Example 4
This embodiment provides an electronic device comprising the soft-packed square lithium electronic battery of embodiment 3. Because the production efficiency of the soft-package square lithium electronic battery is high, the cost is reduced, the cost of the electronic equipment is reduced, and the high-power output stable working state of the electronic equipment is improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. Laminate polymer square battery electrode structure, its characterized in that includes:
the positive plate is provided with a positive empty foil area, and the positive empty foil area is arranged along one long edge of the positive plate;
the negative plate is provided with a negative empty foil area, and the negative empty foil area is arranged along one long edge of the negative plate;
the positive plate, the diaphragm and the negative plate are sequentially wound to form a winding core, the positive empty foil area and the negative empty foil area are respectively positioned at two ends of the winding core, the positive empty foil area is configured to be kneaded and fused into a positive empty foil fusion area by an ultrasonic method along the stacking direction of the winding core, and the negative empty foil area is configured to be kneaded and fused into a negative empty foil fusion area by an ultrasonic method along the stacking direction of the winding core;
the positive pole tab is welded with the positive pole empty foil fusion area;
and the negative electrode tab is welded with the negative electrode empty foil fusion area.
2. The electrode structure of the soft-package square battery according to claim 1, wherein the material of the positive plate is one of lithium cobaltate, ternary lithium nickel cobalt manganese oxide and lithium manganese oxide.
3. The electrode structure of the soft-package square battery according to claim 1, wherein the negative electrode sheet is made of one of lithium titanate, graphite and silicon carbon material.
4. The soft-packed square battery electrode structure as claimed in claim 1, wherein the fusion area of the positive electrode tab and the positive electrode empty foil and the fusion area of the negative electrode tab and the negative electrode empty foil adopt ultrasonic welding or laser welding.
5. The pouch prismatic battery electrode structure according to claim 1, wherein said positive electrode tab and said negative electrode tab are symmetrically disposed at both ends of said roll core.
6. Soft square lithium electronic battery of package, its characterized in that includes:
the pouch prismatic cell electrode structure of any one of claims 1-5;
an electrolyte; and
and the packaging film is used for packaging the winding core and accommodating the electrolyte so that the electrolyte infiltrates the positive plate and the negative plate of the winding core.
7. The soft-packed square lithium electronic battery of claim 6, wherein the electrolyte is comprised of a fluorine-containing lithium salt and an organic solvent.
8. The soft-packed square lithium ion battery according to claim 6, wherein the packaging film is made of an aluminum plastic film.
9. An electronic device comprising the pouch prismatic lithium electronic battery of any of claims 6-8.
10. A process for preparing a pouch prismatic battery electrode structure, for use in the manufacture of a pouch prismatic battery electrode structure according to any one of claims 1 to 5, comprising:
designing the positive plate and the negative plate;
the positive plate, the diaphragm and the negative plate are sequentially wound to form the winding core, and the positive empty foil area and the negative empty foil area are respectively positioned at two ends of the winding core;
kneading and fusing the positive electrode empty foil areas together by adopting an ultrasonic method to form a positive electrode empty foil fusion area, and then welding the positive electrode empty foil fusion area with the positive electrode tab;
kneading and fusing the negative electrode empty foil area together by adopting an ultrasonic method to form a negative electrode empty foil fusion area, and then welding the negative electrode empty foil fusion area with the negative electrode tab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110675216.8A CN113299879A (en) | 2021-06-17 | 2021-06-17 | Soft package square battery electrode structure, battery, electronic equipment and preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110675216.8A CN113299879A (en) | 2021-06-17 | 2021-06-17 | Soft package square battery electrode structure, battery, electronic equipment and preparation process |
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| CN113299879A true CN113299879A (en) | 2021-08-24 |
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| CN202110675216.8A Pending CN113299879A (en) | 2021-06-17 | 2021-06-17 | Soft package square battery electrode structure, battery, electronic equipment and preparation process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114373996A (en) * | 2021-12-31 | 2022-04-19 | 惠州市恒泰科技股份有限公司 | Lithium ion battery and manufacturing method thereof |
| CN114583405A (en) * | 2022-03-17 | 2022-06-03 | 新余赣锋电子有限公司 | Strip-shaped battery and preparation method thereof |
-
2021
- 2021-06-17 CN CN202110675216.8A patent/CN113299879A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114373996A (en) * | 2021-12-31 | 2022-04-19 | 惠州市恒泰科技股份有限公司 | Lithium ion battery and manufacturing method thereof |
| CN114583405A (en) * | 2022-03-17 | 2022-06-03 | 新余赣锋电子有限公司 | Strip-shaped battery and preparation method thereof |
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