CN219739085U - Battery insulating film and power battery - Google Patents
Battery insulating film and power battery Download PDFInfo
- Publication number
- CN219739085U CN219739085U CN202320264481.1U CN202320264481U CN219739085U CN 219739085 U CN219739085 U CN 219739085U CN 202320264481 U CN202320264481 U CN 202320264481U CN 219739085 U CN219739085 U CN 219739085U
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- film
- notch
- battery
- face
- insulating film
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- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 239000007888 film coating Substances 0.000 description 4
- 238000009501 film coating Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
Abstract
The 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 of the battery, and a second side film is formed on the part of the bottom surface film which is not adhered to the bottom of the battery; 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 first side films of the side faces; the left side of the second side film is provided with a first notch, the right side of the second side film is provided with a second notch, the first side film is attached to the side face of the battery, and the part, close to the inner side edge of the first notch, of the second side film is overlapped with the first side film and attached to the side face. The scheme avoids the infirm coating of the insulating film in the overlapping area of four corners at the top of the battery.
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 casing lithium cell on the market adopts to roll over the backing film earlier, and the mode of back roll over the side membrane carries out the coating like electric core insulating film electric core coating structure and battery that patent number 202210771165.3 discloses, however in actual production process, battery assembly all is from last down placing, and this kind of coating mode can lead to the overlap area opening downwards, and the battery is transported or put module or PACK when being in group, takes place to snatch and rub easily to make insulating film overlap area perk, reduced the security of battery.
Disclosure of Invention
Accordingly, it is necessary to provide a battery insulating film and a power battery, which solve the problem of the insulating film lifting in the overlapping area of the four corners of the top of the battery.
The bottom surface film is used for being adhered to the bottom of the battery, and a second side film is formed on the part of the bottom surface film which is not adhered to the bottom of the battery;
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 a first side film is formed on the side face of the large face film at the part which is not attached to the large face;
the left side of the second side film is provided with a first notch, the right side of the second side film is provided with a second notch, and when the second side film is not attached to the side face of the battery, the inner side edges of the first notch and the second notch are at a certain distance from the side face of the battery.
In one embodiment, the distance between the inner side edges of the first notch and the second notch and the inner side edge of the second side film is 5mm-30mm.
In one embodiment, the first notch and the second notch are rectangular.
In one embodiment, the first notch and the second notch have a width of 3mm to 10mm.
In one embodiment, the width of the first side film is 55% -80% of the width of the side.
In one embodiment, the length of the large mask is 103% -107% of the height of the large face.
In one embodiment, the first notch and the second notch are located on the second side film, and sides of the first notch and the second notch, which are close to the large mask, are flush with folds of the bottom mask and the large mask.
In one embodiment, the first notch and the second notch are located partially in the second side film and partially in the first side film.
In one embodiment, the first notch and the second notch are located on the first side film, and sides of the first notch and the second notch, which are close to the second side film, are flush with folds of the bottom film and the large film.
In one embodiment, the first notch and the second notch are located partially in the second side film and partially in the first side film.
In one embodiment, the first notch and the second notch are located on the first side film, and sides of the first notch and the second notch, which are close to the second side film, are flush with folds of the bottom film and the large film.
A power battery comprises the battery insulating film.
According to the battery insulating film and the power battery, the first side film and the second side film are adhered to the side face of the battery in the front-back sequence through the first notch and the second notch, at the moment, the overlapping area of the structural insulating film formed after the battery is wrapped with the insulating film is not more than three layers, the length of the single battery is effectively shortened, the energy density of the battery is improved, meanwhile, the area of the adhesive area between the second side film and the side face is relatively increased, the film coating is firm and is difficult to deglue, and because the battery is placed from top to bottom, when the film coating is transferred or put into a module or a PACK to be grouped, the opening of the overlapping area is upward, and the warping and the safety problem caused by scratch of the overlapping area cannot occur.
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 showing a battery insulating film and a battery bottom attached after a first notch and a second notch are provided 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 illustration of a side attachment of a first side film to a battery in one embodiment;
FIG. 5 is a schematic illustration of a side attachment of a second side film to a battery in one embodiment;
FIG. 6 is a schematic illustration of the portion of the large mask raised from the top and side surfaces of the battery in one embodiment;
FIG. 7 is a schematic view of an embodiment in which a first notch and a second notch are disposed at the junction of a first side film and a second side film;
FIG. 8 is a schematic view of an embodiment where a first notch and a second notch are disposed on a first side film;
reference numerals: 1-big surface; 2-side; 3-big face mask; 3-1 a first side film; 4-a bottom mask; 41-second side film, 42-first notch, 43-second notch.
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. Also, the term "and/or" as used in this specification includes any and all combinations of the associated listed items.
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: a bottom film 4 for adhering to the bottom of the battery, wherein a portion of the bottom film 4 not adhered to the bottom of the battery forms a second side film 41; large face films 3 which are positioned at two sides 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 is formed on the side face of the large face film 3 at the part which is not attached to the large face 1; the second side film 41 has a first notch 42 provided on the left side and a second notch 43 provided on the right side, and when the second side film 41 is not attached to the side surface 2 of the battery, the inner sides of the first notch 42 and the second notch 43 are spaced from the side surface 2 of the battery.
The second side film 41 has a first notch 42 provided on the left side and a second notch 43 provided on the right side, and the first side film 31 is attached to the battery side 2, and a portion of the second side film 41 near the inner side of the first notch 42 overlaps the first side film 31 and is attached to the side 2.
Wherein the height of the large membrane 3 is higher than the height of the side 2 and the large face 1 of the battery.
According to the battery insulating film, the first side film and the second side film are adhered to the side face of the battery in the front-back sequence through the first notch and the second notch, the overlapping area of the structural insulating film formed after the battery is wrapped with the insulating film is not more than three layers, the length of a single battery is effectively shortened, the energy density of the battery is improved, meanwhile, the area, with a glue face, of the bonding area of the second side film and the side face is relatively increased, so that the film coating is firm, the battery is difficult to deglue, and because the battery is placed from top to bottom, after the film coating is finished, the battery is transported or put into a module or a PACK group, the opening of the overlapping area is upward, and the warping and the safety problem caused by scratch of the overlapping area cannot occur.
In one embodiment, the distance between the inner side edges of the first notch 42 and the second notch 43 and the inner side edge of the second side film 41 is in the range of 5mm to 30mm.
In one embodiment, the first notch 42 and the second notch 43 are rectangular.
In one embodiment, the first notch and the second notch have a width of 3mm to 10mm.
In one embodiment, the width of the first side film 31 is 55% -80% of the width of the side 2.
In one embodiment, the length of the large mask 3 is 103% -107% of the height of the large face 1.
In one embodiment, the first notch 42 and the second notch 43 are located on the second side film 41, and the sides of the first notch 42 and the second notch 43 near the large mask 3 are flush with the folds of the bottom surface film 4 and the large mask 3.
In one embodiment, the first notch 42 and the second notch 43 are located partially in the second side film 41 and partially in the first side film 31.
In one embodiment, the first notch 42 and the second notch 43 are located on the first side film 31, and the sides of the first notch 42 and the second notch 43 near the second side film 41 are flush with the folds of the bottom film 4 and the large film 3.
In one embodiment, there is provided a battery insulating film encapsulation method including:
step S110, placing the bottom surface of the battery downwards in the middle of the bottom surface film of the insulating film; the insulation film comprises a bottom film attached to the bottom surface of the middle battery and large films on two sides of the bottom film, a second side film is not formed on the attached portion of the bottom film and the bottom of the battery, and a first notch and a second notch are symmetrically formed on two sides of the second side film;
step S120, respectively attaching two large masks to the large surface of the battery, wherein the parts, which are not attached to the large surface of the battery, of the two sides of the large masks form a first side mask;
step S130, sequentially attaching a plurality of first side films on the side surfaces of the corresponding batteries;
and step S140, overlapping the parts of the second side film close to the inner side edges of the first notch and the second notch respectively, and then attaching the parts to the side surfaces of the battery.
In one embodiment, after overlapping the portions of the second side film adjacent to the inner sides of the first notch and the second notch, respectively, the method includes: and the part of the large membrane, which is higher than the large surface and the side surface of the battery, is adhered to the top of the battery to complete the coating.
In one embodiment, when the second side film is not attached to the side surface of the battery, the inner side edges of the first notch and the second notch are at a distance from the side surface of the battery.
In one embodiment, the first notch and the second notch are located on the second side film, and sides of the first notch and the second notch, which are close to the large mask, are flush with folds of the bottom mask and the large mask.
In one embodiment, a method of manufacturing a power cell is provided, the first notch and the second notch being located partially in the second side film and partially in the first side film.
In one embodiment, the first notch and the second notch are located on the first side film, and sides of the first notch and the second notch, which are close to the second side film, are flush with folds of the bottom film and the large film.
In one embodiment, when the two sides of the large face film are attached to the large face of the battery, the first notch and the second notch are arranged in folds on the two sides of the large face film and the large face.
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 (10)
1. A battery insulating film having a gel layer on one side and a non-gel layer on the other side, comprising:
a bottom film (4) for adhering to the bottom of the battery, wherein a second side film (41) is formed at a part of the bottom film (4) which is not adhered to the bottom of the battery;
the large face films (3) are positioned at two sides 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) is formed on the side face of the large face film (3) at the part which is not attached to the large face (1);
the left side of the second side film (41) is provided with a first notch (42), the right side of the second side film (41) is provided with a second notch (43), and when the second side film (41) is not attached to the side face (2) of the battery, the inner side edges of the first notch (42) and the second notch (43) are at a certain distance from the side face (2) of the battery.
2. The battery insulating film according to claim 1, wherein the inner sides of the first notch (42) and the second notch (43) are each in a range of 5mm to 30mm from the inner side of the second side film (41).
3. The battery insulating film according to claim 1, wherein the first notch (42) and the second notch (43) are rectangular.
4. The battery insulating film according to claim 1, wherein the first notch and the second notch have a width of 3mm to 10mm.
5. The battery insulating film according to claim 1, wherein the width of the first side film (31) is 55% -80% of the width of the side face (2) of the battery.
6. The battery insulating film according to claim 1, characterized in that the length of the large face film (3) is 103% -107% of the height of the large face (1) of the battery.
7. The battery insulating film according to claim 1, wherein the first notch (42) and the second notch (43) are located on the second side film (41), and sides of the first notch (42) and the second notch (43) near the large face film (3) are flush with folds of the bottom face film (4) and the large face film (3).
8. The battery insulating film according to claim 1, wherein the first notch (42) and the second notch (43) are partially located in the second side film (41) and partially located in the first side film (31).
9. The battery insulating film according to claim 1, wherein the first notch (42) and the second notch (43) are located on the first side film (31), and sides of the first notch (42) and the second notch (43) near the second side film (41) are flush with folds of the bottom film (4) and the large film (3).
10. A power battery comprising the battery insulating film according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320264481.1U CN219739085U (en) | 2023-02-21 | 2023-02-21 | Battery insulating film and power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320264481.1U CN219739085U (en) | 2023-02-21 | 2023-02-21 | Battery insulating film and power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219739085U true CN219739085U (en) | 2023-09-22 |
Family
ID=88032814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320264481.1U Active CN219739085U (en) | 2023-02-21 | 2023-02-21 | Battery insulating film and power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219739085U (en) |
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2023
- 2023-02-21 CN CN202320264481.1U patent/CN219739085U/en active Active
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