CN114188616A - Arc-shaped battery and forming method thereof - Google Patents
Arc-shaped battery and forming method thereof Download PDFInfo
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- CN114188616A CN114188616A CN202111362985.9A CN202111362985A CN114188616A CN 114188616 A CN114188616 A CN 114188616A CN 202111362985 A CN202111362985 A CN 202111362985A CN 114188616 A CN114188616 A CN 114188616A
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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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
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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
-
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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 arc-shaped battery and a forming method thereof, wherein the forming method of the arc-shaped battery comprises the steps of firstly carrying out hot-pressing and shaping on a battery body to a preset radian through a shaping clamp, wherein the central angle of the arc-shaped battery is theta 1, and the radius of the arc-shaped battery is r 1; and coating thermosetting resin glue on the surface of the battery shaped by the clamp immediately, and then baking in an oven to cure the thermosetting resin glue to obtain the arc-shaped battery with a preset radian, wherein the central angle of the arc-shaped battery is theta 2, the radius of the arc-shaped battery is r2, and theta 1 is theta 2, and r1 is r 2. Compare in prior art, the battery that this application was accomplished the plastic is quick coats one deck thermosetting resin glue on its surface, later toast the solidification of accelerating the resin glue and make the battery radian design, and arc battery radius and central angle after the design remain unchanged basically, and theta 1 is theta 2, and r1 is r2, realizes good battery radian design effect, makes the arc battery design back difficult rebound.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery manufacturing, and particularly relates to an arc-shaped battery and a forming method thereof.
Background
With the improvement of living standard of people, digital products derived along with individual requirements are endless, such as a wrist mobile phone, a wrist watch, a wrist pressure gauge and the like. The advent of these products has created new challenges for the design of lithium batteries, which have not fully met the needs of the market with conventional shapes. The appearance of a profiled cell in this case solves this problem well. The special-shaped battery not only widens the application field of the lithium battery, but also solves the technical problem that the batteries of some digital products are difficult to use, and promotes the progress of science and technology.
The existing special-shaped battery has high process difficulty and high equipment requirement, so that the special-shaped battery occupies small market share. In the case of soft-package arc-shaped batteries, the radian shaping of the battery is a great difficulty. The existing arc-shaped lithium battery is generally formed by bending, processing and shaping a straight battery by utilizing a shaping clamp. However, the inventor of this application discovers, arc lithium cell is after taking shape, because inside naked electric core all can produce with the opposite power of centre of a circle direction with the plastic-aluminum membrane, and anchor clamps get rid of the back, does not have external force to compete with it for the arc lithium cell takes place the condition of bounce-back after taking shape easily, thereby causes the difficult problem of stereotyping after the arc lithium cell takes shape. Specifically, as shown in fig. 1, if the cell fixture is shaped to the target radian, the central angle is θ 1, and the radius is r 1. However, after a period of time, the radian of the battery core is gradually rebounded, and the rebounding is more obvious as the time is longer, as shown in fig. 2, the radius of the circle is increased, i.e. r1 is greater than r2, and the central angle is decreased, i.e. theta 1 is greater than theta 2, so that the required arc effect cannot be achieved.
Disclosure of Invention
In view of the problems in the related art, an object of the present application is to provide a method for forming an arc-shaped battery, so as to solve the problem of arc rebound of the arc-shaped battery.
In order to achieve the above object, the present application provides a method for forming an arc-shaped battery, including the steps of:
1) the battery body is shaped to a preset radian through a shaping clamp in a hot pressing mode, the central angle of the arc-shaped battery is theta 1, and the radius of the arc-shaped battery is r 1;
2) and immediately coating thermosetting resin glue on the surface of the battery after the clamp is shaped, and then baking the battery in an oven to cure the thermosetting resin glue, so as to obtain the arc-shaped battery with a preset radian, wherein the central angle of the arc-shaped battery is theta 2, and the radius of the arc-shaped battery is r2, wherein theta 1 is theta 2, and r1 is r 2.
Further, the temperature for hot-pressing and shaping the battery in the step 1) is 80-90 ℃, the pressure is 0.5-0.7 Mpa, and the time is 4-8 s.
Further, in the step 2), the thermosetting resin adhesive is at least one of a phenolic resin adhesive, an epoxy resin adhesive, a urea resin adhesive and a polyimide resin adhesive.
Further, the baking temperature in the step 2) is 60-80 ℃, and the baking time is 1-3 h.
Further, the thickness of the thermosetting resin adhesive coated in the step 2) is in a direct proportion relation with the preset radian of the arc-shaped battery.
Further, the battery body in the step 1) is a winding type battery or a laminated type battery.
Further, the shaping clamp in the step 1) comprises a concave base with an arc-shaped surface and a convex base which is matched with the concave base and has an arc-shaped surface.
Further, the radian of the convex base and the concave base of the shaping clamp in the step 1) is the same as the preset radian of the arc-shaped battery.
In addition, the application also provides an arc-shaped battery, and the arc-shaped battery is manufactured by adopting the forming method of the arc-shaped battery.
The technical scheme provided by the application can achieve the following beneficial effects: the application provides a method for forming an arc-shaped battery, which comprises the steps of firstly carrying out hot-pressing forming on a battery body to a preset radian through a shaping clamp, wherein the central angle of the arc-shaped battery is theta 1, and the radius of the arc-shaped battery is r 1; and coating thermosetting resin glue on the surface of the battery shaped by the clamp immediately, and then baking in an oven to cure the thermosetting resin glue to obtain the arc-shaped battery with a preset radian, wherein the central angle of the arc-shaped battery is theta 2, the radius of the arc-shaped battery is r2, and theta 1 is theta 2, and r1 is r 2. Compare in prior art, the battery that this application was accomplished the plastic is quick coats one deck thermosetting resin glue on its surface, later toast the solidification of accelerating the resin glue and make the battery radian design, and arc battery radius and central angle after the design remain unchanged basically, and theta 1 is theta 2, and r1 is r2, realizes good battery radian design effect, makes the arc battery design back difficult rebound.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in 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 application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of the radian change of a prior art arc-shaped battery after shaping.
Fig. 2 is a schematic diagram of a change in curvature of an arc-shaped battery according to an embodiment of the present application after shaping.
Fig. 3 is a schematic structural diagram of an arc-shaped battery according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an orthopedic clamp according to an embodiment of the present application.
In the figure: 1. a battery body; 2. thermosetting resin glue; 3. shaping the clamp; 31. a convex base; 32. a concave base.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it should be understood that the term "and/or" used in the present application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element. The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 2 to 4, the present embodiment provides a method for forming an arc-shaped battery, including the following steps:
1) the battery body 1 is shaped to a preset radian through a shaping clamp 3 in a hot pressing mode, the central angle of the arc-shaped battery is theta 1, and the radius of the arc-shaped battery is r 1;
2) and immediately coating thermosetting resin adhesive 2 on the surface of the battery after the clamp is shaped, and then placing the battery in an oven for baking to cure the thermosetting resin adhesive 2, so as to obtain the arc-shaped battery with a preset radian, wherein the central angle of the arc-shaped battery is theta 2, and the radius of the arc-shaped battery is r2, wherein theta 1 is theta 2, and r1 is r 2.
The radian of the existing arc-shaped battery can be gradually rebounded along with time after the clamp is shaped, and the radian is mainly characterized in that the bare cell and the aluminum-plastic film can generate a force opposite to the direction of the circle center, and after the clamp is removed, no force is counterbalanced with the bare cell and the aluminum-plastic film, so that the radius of the circle where the battery is located is increased, the central angle is reduced, and the required target radian cannot be reached. And this application is through the battery that finishes the plastic quick one deck thermosetting resin glue of coating on its surface, later toast the solidification of accelerating the resin glue and make the battery radian design, and arc battery radius and central angle after the design remain unchanged basically, and theta 1 is theta 2, and r1 is r2, realizes good battery radian design effect, makes the difficult bounce-back of arc battery design back.
In an embodiment according to the present disclosure, the temperature for hot pressing and shaping the battery in step 1) is 80 to 90 ℃, the pressure is 0.5 to 0.7Mpa, and the time is 4 to 8 seconds. Through this hot pressing plastic control, can obtain the arc battery of preliminary shaping.
In an embodiment according to the present application, the time interval between the step 1) of shaping the fixture and the step 2) of applying the thermosetting resin adhesive 2 is less than 30min, preferably less than 15min, and the adhesive coating operation is performed immediately to avoid the arc rebound of the battery after the fixture is shaped, so that the time interval between the fixture and the adhesive coating operation needs to be controlled.
In an embodiment according to the present application, in step 2), the thermosetting resin glue 2 is at least one of a phenolic resin glue, an epoxy resin glue, a urea resin glue, and a polyimide resin glue. Of course, other types of thermosetting resin glue 2 are also possible. The thermosetting resin adhesive 2 can be gradually hardened and molded after being heated, so that the radian of the battery is shaped.
In an embodiment according to the present disclosure, the baking temperature in step 2) is 60-80 ℃, and the baking time is 1-3 hours. The curing of the thermosetting resin adhesive 2 can be accelerated by baking, so that the arc-shaped battery can keep the radian after the shaping of the clamp.
In an embodiment according to the present application, the thickness of the thermosetting resin paste 2 applied in step 2) is in a direct proportional relationship with the predetermined arc of the arc-shaped battery. The thickness of the thermosetting resin adhesive 2 can be controlled according to actual conditions, and generally, the larger the predetermined radian of the arc-shaped battery is, the larger the rebounding force of the arc-shaped battery is, so that the thicker the adhesive layer needs to be coated.
In an embodiment according to the application, the battery body 1 in step 1) is a wound battery or a laminated battery. The composition of the battery body 1 and the specific manufacturing process thereof are conventional processes in the art, and are not described herein again.
In an embodiment according to the present application, the reforming jig 3 in step 1) includes a concave base 32 having an arc-shaped surface and a convex base 31 having an arc-shaped surface adapted to the concave base 32. Wherein, in the shaping process, the arc surface of the concave base 32 is matched with the convex surface of the arc battery, and the arc surface of the convex base 31 is matched with the concave surface of the arc battery.
In an embodiment according to the present application, the curvature of the convex base 31 and the concave base 32 of the reforming jig 3 in step 1) is the same as the predetermined curvature of the arc-shaped battery. To ensure that the required arc of the battery is obtained and that no appearance wrinkles appear during the forming process.
In addition, as shown in fig. 3, the application further provides an arc-shaped battery, the arc-shaped battery comprises a bare cell and an aluminum-plastic film for packaging the bare cell, the bare cell is formed by a positive plate, an isolation film and a negative plate in a winding or lamination mode, and the arc structure of the arc-shaped battery is manufactured by the arc-shaped battery forming method.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (9)
1. A method for forming an arc-shaped battery is characterized by comprising the following steps:
1) the battery body is shaped to a preset radian through a shaping clamp in a hot pressing mode, the central angle of the arc-shaped battery is theta 1, and the radius of the arc-shaped battery is r 1;
2) and immediately coating thermosetting resin glue on the surface of the battery after the clamp is shaped, and then baking the battery in an oven to cure the thermosetting resin glue, so as to obtain the arc-shaped battery with a preset radian, wherein the central angle of the arc-shaped battery is theta 2, and the radius of the arc-shaped battery is r2, wherein theta 1 is theta 2, and r1 is r 2.
2. The method of forming an arc shaped battery according to claim 1, wherein: in the step 1), the temperature for hot-pressing and shaping the battery is 80-90 ℃, the pressure is 0.5-0.7 Mpa, and the time is 4-8 s.
3. The method of forming an arc shaped battery according to claim 1, wherein: in the step 2), the thermosetting resin adhesive is at least one of phenolic resin adhesive, epoxy resin adhesive, urea-formaldehyde resin adhesive and polyimide resin adhesive.
4. The method of forming an arc shaped battery according to claim 1, wherein: the baking temperature in the step 2) is 60-80 ℃, and the baking time is 1-3 h.
5. The method of forming an arc shaped battery according to claim 1, wherein: the thickness of the thermosetting resin adhesive coated in the step 2) is in a direct proportion relation with the preset radian of the arc-shaped battery.
6. The method of forming an arc shaped battery according to claim 1, wherein: the battery body in the step 1) is a winding battery or a laminated battery.
7. The method of forming an arc shaped battery according to claim 1, wherein: the shaping clamp in the step 1) comprises a concave base with an arc-shaped surface and a convex base which is matched with the concave base and has the arc-shaped surface.
8. The method of forming an arc shaped battery according to claim 7, wherein: the radian of the convex base and the radian of the concave base of the shaping clamp in the step 1) are the same as the preset radian of the arc-shaped battery.
9. An arc-shaped battery, characterized in that: the arc-shaped battery is manufactured by the method for forming the arc-shaped battery according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111362985.9A CN114188616A (en) | 2021-11-17 | 2021-11-17 | Arc-shaped battery and forming method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111362985.9A CN114188616A (en) | 2021-11-17 | 2021-11-17 | Arc-shaped battery and forming method thereof |
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| CN114188616A true CN114188616A (en) | 2022-03-15 |
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| CN202111362985.9A Pending CN114188616A (en) | 2021-11-17 | 2021-11-17 | Arc-shaped battery and forming method thereof |
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| CN113140777A (en) * | 2021-05-30 | 2021-07-20 | 惠州市恒泰科技股份有限公司 | Arc battery shaping structure and arc laminate polymer battery |
| CN113140806A (en) * | 2021-05-31 | 2021-07-20 | 惠州市恒泰科技股份有限公司 | Arc-shaped lithium battery and hot-press molding integrated process thereof |
| CN113241474A (en) * | 2021-05-31 | 2021-08-10 | 惠州市恒泰科技股份有限公司 | Arc electricity core and arc lithium cell |
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2021
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012029708A1 (en) * | 2010-08-30 | 2012-03-08 | オリンパス株式会社 | Method for producing compressed wood product |
| KR20150122965A (en) * | 2014-04-24 | 2015-11-03 | 주식회사 엘지화학 | Curved-shaped Electrode Stack Having Elastic Restoring Force And Battery Cell Comprising The Same |
| CN107591566A (en) * | 2016-07-08 | 2018-01-16 | 宁德新能源科技有限公司 | Arc secondary cell forming method |
| CN109585905A (en) * | 2018-12-24 | 2019-04-05 | 广东维都利新能源有限公司 | A kind of arc flexible package lithium cell and preparation method thereof |
| CN113140777A (en) * | 2021-05-30 | 2021-07-20 | 惠州市恒泰科技股份有限公司 | Arc battery shaping structure and arc laminate polymer battery |
| CN113140806A (en) * | 2021-05-31 | 2021-07-20 | 惠州市恒泰科技股份有限公司 | Arc-shaped lithium battery and hot-press molding integrated process thereof |
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