CN219739250U - Battery insulating film and power battery - Google Patents
Battery insulating film and power battery Download PDFInfo
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- CN219739250U CN219739250U CN202320224877.3U CN202320224877U CN219739250U CN 219739250 U CN219739250 U CN 219739250U CN 202320224877 U CN202320224877 U CN 202320224877U CN 219739250 U CN219739250 U CN 219739250U
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- 238000010008 shearing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 239000007888 film coating Substances 0.000 abstract description 8
- 238000009501 film coating Methods 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to a battery insulating film, a battery insulating film coating method and a power battery. The battery insulating film includes: the positioning film is used for being stuck and positioned with the vertical face of the battery, and a fifth top film is formed at the part of the upper end of the positioning film, which is not stuck with the vertical face of the battery; the large films are positioned at the left end and the right end of the positioning film and are used for being adhered to the vertical surfaces of the battery, the large films at the two ends are bent and adhered to the two opposite surfaces of the battery, a first side film and a second side film are formed at the part, which is not adhered to the vertical surfaces of the battery, of the end part of the large film, and a first top film and a second top film are formed at the part, which is not adhered to the top surface of the battery, of the large film; the part of the first side film which is not jointed with the vertical surface forms a third top film, and the part of the second side film which is not jointed with the vertical surface forms a fourth top film. The scheme avoids rebound force of an overlapping area, reduces occurrence of warping phenomenon of the insulating film, and can improve safety of the battery.
Description
Technical Field
The utility model 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 source for providing power for tools, and is a storage battery for providing power for electric automobiles, electric trains, electric bicycles and golf carts. At present, the outer surface of a single battery in the market is coated with an insulating film, and the main effect of the insulating film is to protect the battery, prevent the battery from being scratched and corroded by electrolyte in a module or pack during drying and assembly, and simultaneously, the insulating film also plays a certain attractive effect. The insulating film of a square-case lithium battery on the market will cover a part of the area on the upper part of the battery, and then the battery top patch will cover the upper part of the battery and cover the insulating film. At the same time, the insulating film forms overlapping regions at the four corners of the upper portion of the battery. Because of the lack of adhesive adhesion between the insulating films in the overlapping area, the rebound force of the overlapping area is larger, so that the warping of the overlapping area can be caused, the top patch and the upper part of the battery can be partially separated, the insulativity of the battery is affected, and the safety of the battery is reduced.
Disclosure of Invention
Accordingly, it is necessary to provide a battery insulating film, a battery insulating film coating method, and a power battery, which solve the problem of warpage of the insulating film in the overlapping area of the four corners of the top of the battery.
A battery insulating film having a gel layer on one side and a non-gel layer on the other side, comprising:
the positioning film is used for being stuck and positioned with the vertical face of the battery, and a fifth top film is formed at the part of the upper end of the positioning film, which is not stuck with the vertical face of the battery;
the large films are positioned at the left end and the right end of the positioning film and are used for being adhered to the vertical surfaces of the battery, the large films at the two ends are bent and adhered to the two opposite surfaces of the battery, a first side film and a second side film are formed at the part, which is not adhered to the vertical surfaces of the battery, of the end part of the large film, and a first top film and a second top film are formed at the part, which is not adhered to the top surface of the battery, of the large film;
the part of the first side film which is not jointed with the vertical surface forms a third top film, and the part of the second side film which is not jointed with the vertical surface forms a fourth top film;
the top films on two sides which are opposite to each other are respectively provided with a group of first cutting openings, and the first top film, the second top film, the third top film, the fourth top film and the fifth top film are sequentially folded and adhered to the top surface of the battery along the positions of the first cutting openings.
In one embodiment, after the third top film and the fourth top film are attached to the top surface, the vertical distance between the first cut and the large surface is 1-8mm.
In one embodiment, the length of the large mask is 103% -107% of the height of the large face.
In one embodiment, the first cutout is perpendicular to the top surface; the depth range of the first shearing opening is 1mm-5mm.
In one embodiment, the battery insulating film further includes: and the bottom surface film is arranged at the lower end of the positioning film and is used for being adhered to the bottom of the battery.
In one embodiment, the first and second side films have a width of 55-80% of the width of the side.
In one embodiment, the battery facade is a side of the battery or a large face of the battery.
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 large films at the two ends are bent and attached to the two opposite faces of the battery, the first cutting opening is formed, the first top film, the second top film, the third top film, the fourth top film and the fifth top film are sequentially folded and adhered to the top face of the battery along the first cutting opening, so that the area of the insulating film in the overlapping area of the top face of the battery can be reduced, the adhesive area of the third top film and the fourth top film with the first top film and the second top film can be increased, the resilience of the overlapping area can be effectively reduced, the occurrence of the warping phenomenon of the insulating film is reduced, and the safety of the battery can be improved.
Drawings
FIG. 1 is a schematic illustration of a battery insulating film and a battery side paste in one embodiment;
FIG. 2 is a schematic view showing the structure of a battery insulating film in one embodiment;
FIG. 3 is a schematic illustration of a large face film of a battery insulating film and a large face paste of a battery in one embodiment;
FIG. 4 is a schematic view of the structure of the first side film and the second side film attached to the side of the battery in one embodiment;
fig. 5 is a schematic view of a first cutout structure of a battery insulating film in one embodiment;
FIG. 6 is a schematic illustration of the attachment of a third top film, a fourth top film, and a fifth top film to the top surface of a battery in one embodiment;
FIG. 7 is a schematic illustration of the attachment of the first and second top films to the top surface of the battery in one embodiment;
fig. 8 is a schematic view of a power battery coated with a battery insulating film according to an embodiment;
fig. 9 is a schematic process flow diagram of a battery insulating film coating method in one embodiment.
Reference numerals: 1-big surface; 2-side; 3-big face mask; 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-fourth top film; 37-fifth top film; 4-a bottom mask; 5-a first clipping opening; 7-top surface; 8-positioning the membrane.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present utility model, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
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 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 is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the claims, unless otherwise indicated, and that any structural modifications, proportional changes, or dimensional adjustments, which would otherwise be apparent to those skilled in the art, would be made without departing from the spirit and scope of the utility model.
In one embodiment, as shown in fig. 1 to 8, there is provided a battery insulating film having a glue layer on one side and a non-glue layer on the other side, and a bare cell is attached to the side having the glue layer, the battery insulating film comprising: the positioning film (8) is used for being stuck and positioned with the vertical face of the battery, and a fifth top film (37) is formed at the part of the upper end of the positioning film (8) which is not stuck with the vertical face of the battery; the large face films (3) are positioned at the left end and the right end of the positioning film (8) and are used for being adhered to the vertical faces of the battery, the large face films (3) at the two ends are bent and adhered to the two opposite faces of the battery, a first side film (31) and a second side film (32) are formed at the part, which is not adhered to the vertical faces of the battery, of the end part of the large face film (3), and a first top film (33) and a second top film (34) are formed at the part, which is not adhered to the top face of the battery, of the top part of the large face film (3); a third top film (35) is formed at a part of the first side film (33) which is not jointed with the vertical surface (2), and a fourth top film (36) is formed at a part of the second side film (32) which is not jointed with the vertical surface (2); the top films on two sides which are opposite to each other are respectively provided with a group of first cutting openings (5), and the first top film (33), the second top film (34), the third top film (35), the fourth top film (36) and the fifth top film (37) are sequentially folded and adhered to the top surface (7) of the battery along the positions of the first cutting openings (5).
Wherein, a group of first cuts 5 are respectively arranged on the top films at two sides which are opposite to each other, and the first top film 33, the second top film 34, the third top film 35, the fourth top film 36 and the fifth top film 37 are sequentially folded and adhered to the top surface 7 of the battery along the positions of the first cuts 5.
Above-mentioned battery insulating film, through buckling the big facial mask at both ends and laminating on two opposite sides of battery, set up first cutting, with first top film, second top film, third top film, fourth top film and fifth top film along first cutting position folding bonding in proper order to the top surface of battery, can reduce the area of insulating film in battery top surface overlapping area like this, can increase the bonding area of third top film and fourth top film respectively with first top film and second top film simultaneously, can effectually reduce the resilience in overlapping area, reduce the emergence of insulating film and rise the phenomenon of warping, thereby can increase battery security.
In one embodiment, after the third top film (35) and the fourth top film (36) are attached to the top surface (7), the vertical distance between the first cutting opening (5) and the large surface (1) is 1-8mm.
In one embodiment, the length of the large mask (3) is 103% -107% of the height of the large mask (1).
In one of the embodiments, the first cutout (5) is perpendicular to the top surface (7); the depth range of the first shearing opening (5) is 1mm-5mm.
In one embodiment, the positioning film further comprises: the bottom face film (4), bottom face film (4) set up in locating film (8) lower extreme for paste with the battery bottom.
In one embodiment, the width of the first side film (31) and the second side film (32) is 55-80% of the width of the side surface (2).
In one embodiment, the battery facade is a side of the battery or a large face of the battery.
In one embodiment, a power battery is provided that includes the battery insulating film of the above embodiments.
In one embodiment, as shown in fig. 9, there is provided a battery insulating film coating method including:
s110, forming a positioning film at the middle part of the surface of the insulating film with the adhesive layer, and adhering the positioning film to the vertical surface of the battery, wherein a fifth top film is formed at the part of the upper end of the positioning film, which is not adhered to the vertical surface of the battery;
s120, bending and attaching large films at the left end and the right end of the positioning film to two opposite faces of the battery, wherein a first side film, a second side film, a first top film and a second top film are formed at parts, which are not attached to the vertical faces of the battery, of the two sides of the large film;
s130, bonding the first side film and the second side film to the vertical face of the battery, wherein the part of the first side film which is not bonded with the vertical face forms a third top film, and the part of the second side film which is not bonded with the vertical face forms a fourth top film;
s140, respectively arranging a group of first cuts on the top films on two sides which are opposite to each other;
s150, sequentially folding and bonding the first top film, the second top film, the third top film, the fourth top film and the fifth top film to the top surface of the battery along the first cutting position;
and S160, adhering the bottom surface film to the bottom surface of the battery.
Wherein, the coating is completed after the end of step S160. According to the battery insulating film coating method, the large films at the two ends are bent and attached to the two opposite faces of the battery, the first cutting openings are formed, the first top film, the second top film, the third top film, the fourth top film and the fifth top film are sequentially folded and adhered to the top face of the battery along the first cutting openings, so that the area of the insulating film in the overlapping area of the top face of the battery can be reduced, the adhesive area of the third top film and the fourth top film with the first top film and the second top film can be increased, the resilience force of the overlapping area can be effectively reduced, the occurrence of the warping phenomenon of the insulating film is reduced, and the safety of the battery can be improved.
In the insulating film coating method, the straight line where the first cutting opening is positioned is parallel to the side surface, and the depth of the first cutting opening is smaller than the widths of the first top film and the second top film.
Wherein the third top film, the fourth top film and the fifth top film are bonded to the top surface of the battery. At this time, the area of the overlapping area formed by the battery insulating film on the top surface of the battery is reduced, and meanwhile, the area, with the adhesive glue, of the part of the third top film, the fourth top film and the fifth top film is respectively increased, is adhered to the first top film and the second top film, so that the area easy to lift is effectively reduced, the adhering area is increased, and the phenomenon of lifting of the overlapping area can be effectively avoided.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (8)
1. A battery insulating film having a gel layer on one side and a non-gel layer on the other side, comprising:
the positioning film (8) is used for being stuck and positioned with the vertical face of the battery, and a fifth top film (37) is formed at the part of the upper end of the positioning film (8) which is not stuck with the vertical face of the battery;
the large face films (3) are positioned at the left end and the right end of the positioning film (8) and are used for being adhered to the vertical faces of the battery, the large face films (3) at the two ends are bent and adhered to the two opposite faces of the battery, a first side film (31) and a second side film (32) are formed at the part, which is not adhered to the vertical faces of the battery, of the end part of the large face film (3), and a first top film (33) and a second top film (34) are formed at the part, which is not adhered to the top face of the battery, of the top part of the large face film (3);
a third top film (35) is formed at a portion of the first side film (31) which is not bonded to the side surface (2), and a fourth top film (36) is formed at a portion of the second side film (32) which is not bonded to the side surface (2);
the top films on two sides which are opposite to each other are respectively provided with a group of first cutting openings (5), and the first top film (33), the second top film (34), the third top film (35), the fourth top film (36) and the fifth top film (37) are sequentially folded and adhered to the top surface (7) of the battery along the positions of the first cutting openings (5).
2. The battery insulating film according to claim 1, wherein after the third top film (35) and the fourth top film (36) are attached to the top surface (7), the vertical distance between the first cutout (5) and the large surface (1) is 1-8mm.
3. The battery insulating 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 insulating film according to claim 1, wherein the first cutout (5) is perpendicular to the top surface (7); the depth range of the first shearing opening (5) is 1mm-5mm.
5. The battery insulating film according to claim 1, further comprising: the bottom face film (4), bottom face film (4) set up in locating film (8) lower extreme for paste with the battery bottom.
6. The battery insulating film according to claim 1, wherein the width of the first side film (31) and the second side film (32) is 55 to 80% of the width of the side face (2).
7. The battery insulating film according to claim 1, wherein the battery elevation is a side surface of a battery or a large surface of a battery.
8. A power battery comprising the battery insulating film according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320224877.3U CN219739250U (en) | 2023-02-15 | 2023-02-15 | Battery insulating film and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320224877.3U CN219739250U (en) | 2023-02-15 | 2023-02-15 | Battery insulating film and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219739250U true CN219739250U (en) | 2023-09-22 |
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ID=88027514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320224877.3U Active CN219739250U (en) | 2023-02-15 | 2023-02-15 | Battery insulating film and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219739250U (en) |
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2023
- 2023-02-15 CN CN202320224877.3U patent/CN219739250U/en active Active
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