CN115986337A - Battery insulating film, battery insulating film coating method and power battery - Google Patents
Battery insulating film, battery insulating film coating method and power battery Download PDFInfo
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- CN115986337A CN115986337A CN202211490714.6A CN202211490714A CN115986337A CN 115986337 A CN115986337 A CN 115986337A CN 202211490714 A CN202211490714 A CN 202211490714A CN 115986337 A CN115986337 A CN 115986337A
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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 invention relates to a battery insulating film, a battery insulating film coating method and a power battery. The battery insulating film includes: the bottom surface film is used for being stuck to the bottom of the battery; the large face films are positioned on the two sides of the bottom surface film and are used for being attached to the two large faces of the battery; the first top film and the second top film are provided with first notches close to the side faces of the battery, and the third side film is provided with second notches close to the folds of the first side film and the second side film; and the first side film, the second side film and the third side film are attached to the side surface of the battery, the first side film does not form a third top film with the side surface attaching part, the second side film does not form a fourth top film with the side surface attaching part, and the third top film, the fourth top film, the first top film and the second top film are used for being adhered to the top surface of the battery. The insulating film of battery top four corners overlap region is avoided to the present case upwarps.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a battery insulating film, a battery insulating film coating method and a power battery.
Background
The power battery is a power supply for providing a power source for the tool, and is a storage battery for providing power for electric vehicles, electric trains, electric bicycles and golf carts. At present, the outer surface of the single battery on the market can be coated with an insulating film, the insulating film is coated mainly to protect the battery, the battery is prevented from being scratched and corroded by electrolyte in a drying and assembling module or pack, and meanwhile, the insulating film also plays a certain attractive role. The insulating film of a square-casing lithium battery on the market covers a part of the area on the upper part of the battery, and then the battery top patch covers the upper part of the battery and covers the insulating film. At the same time, the insulating film forms overlapping regions at the four corners of the upper portion of the cell. Due to the fact that glue adhesion is not formed between the insulating films in the overlapping area, the rebound force of the overlapping area is large, the overlapping area is warped, the top patch is partially separated from the upper portion of the battery, the insulativity of the battery is affected, and the safety of the battery is reduced.
Disclosure of Invention
In view of the above, it is necessary to provide a battery insulating film, a method for coating the battery insulating film, and a power battery, which solve the problem of warping of the insulating film in the overlapping region of the four corners of the top of the battery.
A battery insulating film having a glue layer on one side and a non-glue layer on the other side, comprising:
the bottom surface film is used for being stuck with the bottom of the battery, and a third side film is formed on the part, which is not stuck with the bottom of the battery, of the bottom surface film;
the large face films are positioned on two sides of the bottom face film and are used for being attached to two large faces of the battery, and the parts, which are not attached to the large faces, of the large face films form a first side film and a second side film on the side faces and a first top film and a second top film on the top;
the first top film and the second top film are provided with first notches at the positions close to the side faces of the battery, and the third side film is provided with second notches at the positions close to the folds of the first side film and the second side film; and the first side film, the second side film and the third side film are attached to the side surface of the battery, the first side film does not form a third top film with the side surface attaching part, the second side film does not form a fourth top film with the side surface attaching part, and the third top film, the fourth top film, the first top film and the second top film are used for being adhered to the top surface of the battery.
Further, when the third top film and the fourth top film are not bonded with the top surface of the battery, the distance between the first cut and the third top film or the fourth top film is 1-10mm.
Further, the length of the large face mask is 103% -107% of the height of the large face mask.
Further, the first shear notch is perpendicular to the top surface.
Further, the second shear notch is perpendicular to the side surface.
Further, the first side film and the second side are shown to have a width that is 55% to 80% of the width of the sides.
A method of encapsulating a battery insulating film, the method comprising:
aligning the bottom of the battery to one side of the insulating film with the glue layer and placing the bottom of the battery on the bottom film, wherein a third side film is formed on the part, which is not adhered to the bottom of the battery, of the bottom film;
the large face films at two ends of the insulating film are attached to two large faces of the battery, and the parts of the large face films which are not attached to the large faces form a first side film and a second side film on the side faces and a first top film and a second top film on the top;
cutting the side surfaces, close to the battery, of the first top film and the second top film to form a first cut;
cutting the third side film at the position close to the crease lines of the first side film and the second side film to form a second cut;
sequentially attaching a first side film, a second side film and a third side film to the side surface of the battery, wherein the part of the first side film which is not attached to the side surface forms a third top film, and the part of the second side surface which is not attached to the side surface forms a fourth top film;
and bonding the third top film and the fourth top film to the top surface of the battery, and then bonding the first top film and the second top film to the top surface of the battery.
Furthermore, the straight line where the first cut is located is parallel to the side face, and the depth of the first cut is smaller than the width of the first top film and the width of the second top film; and/or the second cut is parallel to the third side film and the folds of the first side film and the second side film, and the depth of the second cut is smaller than the width of the first side film and the second side film.
A power battery comprises the battery insulating film.
According to the battery insulating film, the battery insulating film coating method and the power battery, the third top film, the fourth top film, the first top film and the second top film are adhered to the top surface of the battery through the first shear port, the area of an overlapping area formed by the battery insulating film on the top surface of the battery is reduced, meanwhile, the area, with part of adhesive glue, of the first top film and the second top film is respectively added to be adhered to the third top film and the fourth top film, so that the area easy to warp can be effectively reduced, the adhering area is increased, and the phenomenon that the overlapping area warps can be effectively avoided.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a battery insulating film bonded to the bottom of a battery;
FIG. 2 is a schematic view of an embodiment of a large surface film of a battery insulating film attached to a large surface of a battery;
FIG. 3 is a schematic diagram of the structure of a first cutout and a second cutout of a battery insulating film in one embodiment;
FIG. 4 is a schematic diagram of the attachment of the first side film, the second side film, and the third side film to the side of the cell in one embodiment;
FIG. 5 is a schematic diagram of the third top film, the fourth top film and the top surface of the battery according to one embodiment;
FIG. 6 is a schematic illustration of a first top film and a second top film attached to a top surface of a battery in one embodiment;
FIG. 7 is a schematic diagram of an embodiment of a power cell coated with a cell insulating film;
FIG. 8 is a schematic process flow diagram illustrating a method for encapsulating a battery insulating film according to an embodiment.
Reference numerals: 1-big noodle; 2-side; 3, large face pack; 31-a first side film; 32-a second side film; 33-a first top film; 34-a second top film; 35-a third top film; 36-a fourth top film; 4-bottom film; 41-third side film; 5-a first cut; 6-a second cut; 7-top surface.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, as shown in fig. 1 to 7, there is provided a battery insulation film, one side of which has a glue layer and the other side of which is a non-glue layer, and a bare cell is adhered to the side having the glue layer, the battery insulation film comprising: a bottom surface film 4 for sticking to the bottom of the battery, wherein the part of the bottom surface film 4 which is not stuck to the bottom of the battery forms a third side film 41; the large face films 3 are positioned on two sides of the bottom face film 4 and are used for being attached to two large faces 1 of the battery, and the parts, which are not attached to the large faces 1, of the large face films 3 form a first side film 31 and a second side film 32 on the side faces, and a first top film 33 and a second top film 34 on the top faces; wherein, a first cut 5 is arranged at the position of the first top film 33 and the second top film 34 close to the side face 2 of the battery, and a second cut 6 is arranged at the position of the third side film 41 close to the crease of the first side film 31 and the second side film 32; in the state where the first side film 31, the second side film 32, and the third side film 41 are attached to the side face 2 of the battery, the portion of the first side film 31 that is not attached to the side face 2 forms the third top film 35, the portion of the second side film that is not attached to the side face 2 forms the fourth top film 36, and the third top film 35, the fourth top film 36, the first top film 33, and the second top film 34 are used for adhesion to the top face 7 of the battery.
Above-mentioned battery insulating film, through first cut with the third apical membrane, the fourth apical membrane, first apical membrane and second apical membrane paste the top surface at the battery, the overlapping area that battery insulating film formed at the battery top surface at this moment diminishes, first apical membrane and second apical membrane are come out partly respectively and are had the region that viscidity was glued and bond with third apical membrane and fourth apical membrane, can effectual reduction easily rise the area of sticking up like this, the sticking area has been increased, so can effectively avoid the emergence of overlapping area upwarping phenomenon.
In one embodiment, as shown in fig. 4, when the third top film 35 and the fourth top film 36 are not adhered to the top surface 7 of the battery, the distance between the first cut 5 and the third top film 35 or the fourth top film 36 is 1-10mm.
In one embodiment, as shown in fig. 2 and 3, the large face mask 3 has a length of 103% -107% of the height of the large face 1.
In one embodiment, as shown in fig. 3 and 4, the first cutting opening 5 is perpendicular to the top surface 7.
In one embodiment, the second shear notch 6 is perpendicular to the side 2, as shown in fig. 3.
In one embodiment, as shown in fig. 2 and 3, the first side film 31 and the second side 32 are shown to have a width that is 55% to 80% of the width of the side 2. In this embodiment, the first side film 31 and the second side 32 are larger than the first half of the width of the side 2, so that the side can be wrapped, and the widths of the first side film 31 and the second side 32 are increased, so that the overlapping area is increased, and the wrapping is firmer, but the increased widths of the first side film 31 and the second side 32 increase the area usage of the insulating film, which is not favorable for cost saving, so that the widths of the first side film 31 and the second side 32 are 55% -80% of the width of the side 2, which not only ensures that the interface positions of the first side film 31 and the second side 32 are pasted firmer, but also ensures the saving of the insulating film material.
In one embodiment, as shown in fig. 8, there is provided a battery insulating film encapsulation method including:
and S110, aligning the bottom of the battery to one side of the insulating film with the glue layer and placing the bottom of the battery on the bottom film 4, wherein the part of the bottom film 4 which is not adhered to the bottom of the battery forms a third side film 41.
And S120, bonding the large face films 3 at the two ends of the insulating film on the two large faces 1 of the battery, wherein the parts, which are not bonded with the large faces 1, of the large face films 3 form the first side film 31 and the second side film 32 on the side faces, and the first top film 33 and the second top film 34 on the top parts.
And S130, cutting the side surfaces 2 of the first top film 33 and the second top film 34 close to the battery to form a first cut 5.
And S140, performing cutting on the third side film 41 close to the crease lines with the first side film 31 and the second side film 32 to form a second cut 6.
And S150, sequentially bonding the first side film 31, the second side film 32 and the third side film 41 to the side face 2 of the battery, wherein the third top film 35 is formed at the part of the first side film 31 which is not bonded with the side face 2, and the fourth top film 36 is formed at the part of the second side face which is not bonded with the side face 2.
S160, the third top film 35 and the fourth top film 36 are bonded to the top surface 7 of the battery, and the first top film 33 and the second top film 34 are bonded to the top surface 7 of the battery.
The enveloping is completed after step S160. According to the method for coating the battery insulating film, the third top film, the fourth top film, the first top film and the second top film are adhered to the top surface of the battery through the first cut, the area of the overlapping area formed by the battery insulating film on the top surface of the battery is reduced, meanwhile, the first top film and the second top film are respectively added to form a part of the area with the adhesive glue to be adhered to the third top film and the fourth top film, so that the area easy to warp can be effectively reduced, the adhering area is increased, and the phenomenon that the overlapping area warps can be effectively avoided.
In one embodiment, the first cut 5 is located in a line parallel to the side 2, and the depth of the first cut 5 is smaller than the width of the first top film 33 and the second top film 34; and/or the second cut 6 is parallel to the folds of the third side film 41 and the first and second side films 31, 32, the depth of the second cut 6 being smaller than the width of the first and second side films 31, 32.
In one embodiment, as shown in fig. 4, when the third top film 35 and the fourth top film 36 are not adhered to the top surface 7 of the battery, the distance between the first notch 5 and the third top film 35 or the fourth top film 36 is 1-10mm.
In one embodiment, as shown in fig. 2 and 3, the length of the large face film 3 is 103% -107% of the height of the large face 1.
In one embodiment, as shown in fig. 3 and 4, the first cut 5 is perpendicular to the top surface 7.
In one embodiment, the second cut-out 6 is perpendicular to the side 2, as shown in fig. 3.
In one embodiment, as shown in fig. 2 and 3, the first side film 31 and the second side 32 are shown to have a width that is 55% to 80% of the width of the side 2. In this embodiment, the first side film 31 and the second side 32 are larger than the first half of the width of the side 2, so that the side can be wrapped, and the widths of the first side film 31 and the second side 32 are increased, so that the overlapping area is increased, and the wrapping is firmer, but the increased widths of the first side film 31 and the second side 32 increase the area usage of the insulating film, which is not favorable for cost saving, so that the widths of the first side film 31 and the second side 32 are 55% -80% of the width of the side 2, which not only ensures that the interface positions of the first side film 31 and the second side 32 are pasted firmer, but also ensures the saving of the insulating film material.
In one embodiment, as shown in fig. 7, there is provided a power battery comprising the battery insulating film described in the above embodiments.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A battery insulating film, one side has the glue film, another side is not the glue film, its characterized in that includes:
the bottom surface film (4) is used for being adhered to the bottom of the battery, and a third side film (41) is formed on the part, which is not adhered to the bottom of the battery, of the bottom surface film (4);
the large face films (3) are positioned on two sides of the bottom face film (4) and are used for being attached to two large faces (1) of the battery, and the parts, which are not attached to the large faces (1), of the large face films (3) form a first side film (31) and a second side film (32) on the side faces and a first top film (33) and a second top film (34) on the top portions;
wherein, a first cut (5) is arranged at the positions of the first top film (33) and the second top film (34) close to the side surface (2) of the battery, and a second cut (6) is arranged at the position of the third side film (41) close to the crease of the first side film (31) and the second side film (32); the first side film (31), the second side film (32) and the third side film (41) are attached to the side surface (2) of the battery, a third top film (35) is formed on the portion, which is not attached to the side surface (2), of the first side film (31), a fourth top film (36) is formed on the portion, which is not attached to the side surface (2), of the second side film, and the third top film (35), the fourth top film (36), the first top film (33) and the second top film (34) are used for being bonded to the top surface (7) of the battery.
2. The battery insulating film according to claim 1, wherein the first notch (5) is spaced from the third top film (35) or the fourth top film (36) by 1 to 10mm when the third top film (35) and the fourth top film (36) are not bonded to the top surface (7) of the battery.
3. The battery insulation film according to claim 1, wherein the length of the large face film (3) is 103-107% of the height of the large face (1).
4. The battery insulation film of claim 1, wherein the first cutout (5) is perpendicular to the top surface (7).
5. The battery insulation film according to claim 1, wherein the second cutout (6) is perpendicular to the side surface (2).
6. The battery insulating film according to claim 1, wherein the width of the first side film (31) and the second side surface (32) is 55-80% of the width of the side surface (2).
7. A method for coating a battery insulating film, the method comprising:
aligning the bottom of the battery to one side of the insulating film with the glue layer and placing the bottom of the battery on the bottom film, wherein the part of the bottom film, which is not adhered to the bottom of the battery, forms a third side film;
the large face films at two ends of the insulating film are attached to two large faces of the battery, and the parts of the large face films which are not attached to the large faces form a first side film and a second side film on the side faces and a first top film and a second top film on the top;
cutting the side surfaces, close to the battery, of the first top film and the second top film to form a first cut;
cutting the third side film at the position close to the crease lines of the first side film and the second side film to form a second cut;
sequentially attaching a first side film, a second side film and a third side film to the side face of the battery, wherein the first side film does not form a third top film with the side face attaching part, and the second side film does not form a fourth top film with the side face attaching part;
and bonding the third top film and the fourth top film to the top surface of the battery, and then bonding the first top film and the second top film to the top surface of the battery.
8. The method for encapsulating a battery insulating film according to claim 7, wherein a line on which the first notch is located is parallel to the side surface, and a depth of the first notch is smaller than widths of the first top film and the second top film; and/or the second cuts are parallel to the folds of the third side film and the first and second side films, and the depth of the second cuts is less than the width of the first and second side films.
9. A power cell comprising the cell insulating film of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490714.6A CN115986337A (en) | 2022-11-25 | 2022-11-25 | Battery insulating film, battery insulating film coating method and power battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211490714.6A CN115986337A (en) | 2022-11-25 | 2022-11-25 | Battery insulating film, battery insulating film coating method and power battery |
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| CN115986337A true CN115986337A (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211490714.6A Pending CN115986337A (en) | 2022-11-25 | 2022-11-25 | Battery insulating film, battery insulating film coating method and power battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683014A (en) * | 2023-08-03 | 2023-09-01 | 深圳市誉辰智能装备股份有限公司 | Method for coating square shell battery with film prepared in advance |
| CN116742222A (en) * | 2023-08-16 | 2023-09-12 | 深圳海辰储能控制技术有限公司 | Energy storage device, outer envelope and electronic equipment |
| CN116826264A (en) * | 2023-08-29 | 2023-09-29 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
-
2022
- 2022-11-25 CN CN202211490714.6A patent/CN115986337A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116683014A (en) * | 2023-08-03 | 2023-09-01 | 深圳市誉辰智能装备股份有限公司 | Method for coating square shell battery with film prepared in advance |
| CN116742222A (en) * | 2023-08-16 | 2023-09-12 | 深圳海辰储能控制技术有限公司 | Energy storage device, outer envelope and electronic equipment |
| CN116742222B (en) * | 2023-08-16 | 2023-10-13 | 深圳海辰储能控制技术有限公司 | Energy storage device, outer envelope and electronic equipment |
| CN116826264A (en) * | 2023-08-29 | 2023-09-29 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
| CN116826264B (en) * | 2023-08-29 | 2023-12-22 | 深圳海辰储能控制技术有限公司 | Energy storage device and electric equipment |
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Effective date of registration: 20230518 Address after: 421681 Jinwei Road, Guiyang Industrial Park, Qidong County, Hengyang City, Hunan Province Applicant after: Hunan lingpaidazhi Technology Co.,Ltd. Applicant after: Hunan Lingpai New Energy Technology Co.,Ltd. Applicant after: Hengyang Lingpai New Energy Technology Co.,Ltd. Applicant after: Hunan Lingpai New Energy Research Institute Co.,Ltd. Applicant after: Hunan Lingpai Energy Storage Technology Co.,Ltd. Address before: 421681 Jinwei Road, Guiyang Industrial Park, Qidong County, Hengyang City, Hunan Province Applicant before: Hunan lingpaidazhi Technology Co.,Ltd. Applicant before: Hunan Lingpai New Energy Technology Co.,Ltd. Applicant before: Hengyang Lingpai New Energy Technology Co.,Ltd. Applicant before: Hunan Lingpai Dingxin Battery Research Institute Co.,Ltd. |
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