CN219917530U - Battery insulating film and power battery - Google Patents
Battery insulating film and power battery Download PDFInfo
- Publication number
- CN219917530U CN219917530U CN202320155062.4U CN202320155062U CN219917530U CN 219917530 U CN219917530 U CN 219917530U CN 202320155062 U CN202320155062 U CN 202320155062U CN 219917530 U CN219917530 U CN 219917530U
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- Prior art keywords
- battery
- film
- insulating film
- face
- side film
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- 239000012528 membrane Substances 0.000 claims description 12
- 239000010410 layer Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000007888 film coating Substances 0.000 description 6
- 238000009501 film coating Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 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
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present utility model relates to a battery insulating film and a power battery. The battery insulating film includes: the bottom surface film is used for being adhered to the bottom surface of the battery, and a part of the bottom surface film, which is not adhered to the bottom surface of the battery, forms a third side film; the large face films are positioned at two ends of the bottom face film and are used for being attached to two large faces of the battery, and a first side film and a second side film of the side face are formed on the parts, which are not attached to the large faces, of the large face films; the first side film, the second side film and the third side film are folded and attached to the side face of the battery along the positions of the first cut and the second cut in sequence. The scheme can reduce the area of the side overlapping area of the battery insulating film, the bonding area is opened upwards, and the battery is not easy to scratch during boxing.
Description
Technical Field
The utility model relates to the technical field of power batteries, in particular to a battery insulating film 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 coating mode of square shell lithium battery on the market mainly has two modes of back coating and U type coating, but the two sides of present coating mode battery all have about 5 layers of insulating film, just so increased the external dimension of battery to occupy certain battery system space, caused the space waste of battery, and the overlapping area of insulating film is less, after a period of time, the overlapping area drops easily, has influenced the security of battery.
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 that the battery insulating film is coated on the overlapping area of the battery surface and is easily detached.
A battery insulating film having a gel layer on one side and a non-gel layer on the other side, comprising:
the bottom surface film is used for being adhered to the bottom surface of the battery, and a part of the bottom surface film, which is not adhered to the bottom surface of the battery, forms a third side film;
the large face films are positioned at two ends of the bottom face film and are used for being attached to two large faces of the battery, and a first side film and a second side film of the side face are formed on the parts, which are not attached to the large faces, of the large face films;
the first side film, the second side film and the third side film are folded and attached to the side face of the battery along the positions of the first cut and the second cut in sequence.
Further, the length of the large mask ranges from 103% to 107% of the height of the large face of the battery; after the first side film, the second side film and the third side film are attached to the side face of the battery, the parts, higher than the large face and the side face of the battery, of the large face film are attached to the top of the battery.
Further, the width of the first side film or the second side film ranges from 55 to 80% of the width of the side face of the battery.
Further, the first and second cuts are parallel to the bottom surface of the battery.
Further, the depth of the first cut is smaller than the width of the first side film, and the depth of the second cut is smaller than the width of the second side film.
Further, the distance between the first cut, the second cut and the third side film is 1mm-10mm.
A battery insulating film coating method comprising:
aligning the bottom of the battery with one side of the insulating film with the adhesive layer and placing the insulating film on the bottom film, wherein a part of the bottom film, which is not adhered to the bottom of the battery, forms a third side film;
attaching large films at two ends of the insulating film to two large surfaces of the battery, wherein parts of the large films which are not attached to the large surfaces form a first side film and a second side film of the side surfaces;
a first shear port is transversely arranged at one end of the first side film close to the third side film;
a second shear port is transversely arranged at one end of the second side film close to the third side film;
and folding and attaching the first side film, the second side film and the third side film on the side surface of the battery along the first cutting opening and the second cutting opening in sequence.
Further, the length of the large mask ranges from 103% to 107% of the height of the large face of the battery; after folding and attaching the first side film, the second side film and the third side film to the side surface of the battery along the first and second cut positions in this order, the battery comprises: and adhering the parts of the large face film, which are higher than the large face and the side faces of the battery, to the top of the battery.
Further, with first side membrane, second side membrane and third side membrane in proper order along first cut, second cut position folding laminating on the side of battery, include: attaching a first side film to the side surface of the battery; attaching a second side film to the side surface of the battery; and folding and attaching the third side film on the side surface of the battery along the positions of the first cutting opening and the second cutting opening.
A power battery includes the battery insulating film.
According to the battery insulating film, the battery insulating film coating method and the power battery, the third side film is folded and attached to the side face of the battery along the first cutting opening and the second cutting opening, at the moment, the overlapping area of the insulating film is not more than three layers, the length of the single battery is effectively shortened, and the energy density of the battery is improved; the area of the adhesive surface of the bonding area of the third side film and the side surface of the battery is relatively increased, so that the film is firmly coated, the adhesive is not easy to degum, and the safety of the battery is improved; meanwhile, the opening of the bonding area faces upwards, and when the battery coated with the insulating film is downwards arranged in the battery box body, the battery is not easily scraped by the edge of the battery box body.
Drawings
FIG. 1 is a schematic illustration showing a battery insulating film adhered to the bottom of a battery in one embodiment;
FIG. 2 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. 3 is a schematic view showing the structure of a first cutout and a second cutout of a battery insulating film in one embodiment;
FIG. 4 is a schematic view of a structure in which a first side film is attached to a side of a battery in one embodiment;
FIG. 5 is a schematic illustration of the structure of a second side film attached to the side of a battery in one embodiment;
FIG. 6 is a schematic structural view of a third side film attached to a side of a battery in one embodiment;
fig. 7 is a schematic view showing a structure in which a battery insulating film is fully attached to a surface of a battery in one embodiment;
fig. 8 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 incision; 34-a second incision; 4-a bottom mask; 41-third side film.
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 7, 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: a bottom film 4 for adhering to the bottom surface of the battery, wherein a portion of the bottom film not adhering to the bottom surface of the battery forms a third side film 41; large face films 3 positioned at two ends of the bottom face film 4 and used for being attached to two large faces 1 of the battery, and a first side film 31 and a second side film 32 of the side faces are formed on parts, which are not attached to the large faces 1, of the large face films 3; wherein, a first notch 33 is transversely arranged at one end of the first side film 31 close to the third side film 41, a second notch 34 is transversely arranged at one end of the second side film 32 close to the third side film 41, and the first side film 31, the second side film 32 and the third side film 41 are folded and attached on the side surface 2 of the battery along the positions of the first notch 33 and the second notch 34 in sequence.
According to the battery insulating film, the third side film is folded and attached to the side face of the battery along the first cutting opening and the second cutting opening, at the moment, the overlapping area of the insulating film is not more than three layers, the length of the single battery is effectively shortened, and the energy density of the battery is improved; the area of the adhesive surface of the bonding area of the third side film and the side surface of the battery is relatively increased, so that the film is firmly coated, the adhesive is not easy to degum, and the safety of the battery is improved; meanwhile, the opening of the bonding area faces upwards, and when the battery coated with the insulating film is downwards arranged in the battery box body, the battery is not easily scraped by the edge of the battery box body.
In one embodiment, as shown in fig. 1-7, the length of the large membrane 3 ranges from 103% to 107% of the height of the large face 1 of the battery; after 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, the portion of the large film 3 higher than the large surface 1 and the side surface 2 of the battery is attached to the top of the battery.
Wherein, when the large face film 3 is adhered to the large face, the length direction of the large face film is parallel to the height direction of the large face.
In one embodiment, as shown in fig. 2-5, the width of the first side film 31 or the second side film 32 ranges from 55-80% of the width of the side 2 of the battery. In this embodiment, the first side film or the second side film is greater than half the width of the side surface, so that the whole coverage of the side surface can be ensured.
In one embodiment, as shown in fig. 3-4, the first and second cutouts 33, 34 are parallel to the bottom surface of the battery.
In one embodiment, as shown in fig. 3-4, the first cutout 33 has a depth less than the width of the first side film 31 and the second cutout 34 has a depth less than the width of the second side film 32. Wherein the depth of the first cutout 33 ranges from one third to four fifths of the width of the first side film 31.
In one embodiment, as shown in fig. 3-4, the first and second cuts 33, 34 are each in the range of 1mm-10mm from the third side film 41.
In one embodiment, as shown in fig. 8, there is provided a battery insulating film coating method including:
and S110, aligning the bottom of the battery with one surface of the insulating film with the adhesive layer and placing the surface on the bottom film, wherein a part of the bottom film, which is not adhered to the bottom of the battery, forms a third side film.
And S120, attaching large films at two ends of the insulating film to two large surfaces of the battery, wherein the parts, which are not attached to the large surfaces, of the large films form a first side film and a second side film of the side surfaces.
S130, a first notch is transversely formed in one end, close to the third side film, of the first side film.
And S140, transversely arranging a second notch at one end of the second side film close to the third side film.
And S150, folding and attaching the first side film, the second side film and the third side film on the side surface of the battery along the positions of the first cutting opening and the second cutting opening in sequence.
According to the battery insulating film coating method, the third side film is folded and attached to the side face of the battery along the first cutting opening and the second cutting opening, at the moment, the overlapping area of the insulating film is not more than three layers, the length of the single battery is effectively shortened, and the energy density of the battery is improved; the area of the adhesive surface of the bonding area of the third side film and the side surface of the battery is relatively increased, so that the film is firmly coated, the adhesive is not easy to degum, and the safety of the battery is improved; meanwhile, the opening of the bonding area faces upwards, and when the battery coated with the insulating film is downwards arranged in the battery box body, the battery is not easily scraped by the edge of the battery box body.
In one embodiment, the length of the large membrane ranges from 103% to 107% of the height of the large face of the battery. After folding and attaching the first side film, the second side film and the third side film to the side surface of the battery along the first and second cut positions in this order, the battery comprises: and adhering the parts of the large face film, which are higher than the large face and the side faces of the battery, to the top of the battery.
In one embodiment, the folding and attaching the first side film, the second side film and the third side film to the side surface of the battery along the first cutting opening and the second cutting opening in sequence includes: attaching a first side film to the side surface of the battery; attaching a second side film to the side surface of the battery; and folding and attaching the third side film on the side surface of the battery along the positions of the first cutting opening and the second cutting opening.
Wherein, when the large face film 3 is adhered to the large face, the length direction of the large face film is parallel to the height direction of the large face.
In one embodiment, as shown in fig. 2-5, the width of the first side film 31 or the second side film 32 ranges from 55-80% of the width of the side 2 of the battery. In this embodiment, the first side film or the second side film is greater than half the width of the side surface, so that the whole coverage of the side surface can be ensured.
In one embodiment, as shown in fig. 3-4, the first and second cutouts 33, 34 are parallel to the bottom surface of the battery.
In one embodiment, as shown in fig. 3-4, the first cutout 33 has a depth less than the width of the first side film 31 and the second cutout 34 has a depth less than the width of the second side film 32.
In one embodiment, as shown in fig. 3-4, the first and second cuts 33, 34 are each in the range of 1mm-10mm from the third side film 41.
In one embodiment, as shown in fig. 7, a power battery is provided, including the battery insulating film described in the above embodiment.
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 (7)
1. A battery insulating film having a gel layer on one side and a non-gel layer on the other side, comprising:
a bottom surface film (4) for adhering to the bottom surface of the battery, wherein a part of the bottom surface film, which is not adhered to the bottom surface of the battery, forms a third side film (41);
the large face films (3) are positioned at two ends of the bottom face film (4) and are used for being attached to two large faces (1) of the battery, and a first side film (31) and a second side film (32) of the side faces are formed on parts, which are not attached to the large faces (1), of the large face films (3);
wherein, transversely set up first cut (33) in the one end that first side membrane (31) is close to third side membrane (41), transversely set up second cut (34) in the one end that second side membrane (32) is close to third side membrane (41), first side membrane (31), second side membrane (32) and third side membrane (41) are folded along first cut (33), second cut (34) position in proper order and are laminated on side (2) of battery.
2. The battery insulating film according to claim 1, characterized in that the length of the large face film (3) ranges from 103% to 107% of the height of the large face (1) of the battery; after 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 part of the large film (3) higher than the large face (1) and the side face (2) of the battery is attached to the top of the battery.
3. The battery insulating film according to claim 1, wherein the width of the first side film (31) or the second side film (32) ranges from 55 to 80% of the width of the side face (2) of the battery.
4. The battery insulating film according to claim 1, wherein the first cutout (33), the second cutout (34) are parallel to the battery bottom surface.
5. The battery insulating film according to claim 1, wherein the depth of the first cutout (33) is smaller than the width of the first side film (31), and the depth of the second cutout (34) is smaller than the width of the second side film (32).
6. The battery insulating film according to claim 1, wherein the first cutout (33), the second cutout (34), and the third side film (41) are each in a distance range of 1mm to 10mm.
7. A power battery comprising the battery insulating film according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320155062.4U CN219917530U (en) | 2023-02-08 | 2023-02-08 | Battery insulating film and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320155062.4U CN219917530U (en) | 2023-02-08 | 2023-02-08 | Battery insulating film and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219917530U true CN219917530U (en) | 2023-10-27 |
Family
ID=88421971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320155062.4U Active CN219917530U (en) | 2023-02-08 | 2023-02-08 | Battery insulating film and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219917530U (en) |
-
2023
- 2023-02-08 CN CN202320155062.4U patent/CN219917530U/en active Active
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