Insulating film, single battery, battery pack and vehicle

Abstract

The utility model discloses an insulating film, a single battery, a battery pack and a vehicle, the insulating film comprises an insulating base layer, the insulating base layer comprises a first insulating surface, a second insulating surface, a first folding surface and a second folding surface, the first insulating surface and the second insulating surface are arranged on two opposite sides of a pole core, and the first folding surface is arranged on the first insulating surface; the first folding surface is connected to the end part of the first insulating surface, and the second folding surface is connected to the end part of the second insulating surface; and the sealing coating is arranged on at least one of the first folding surface and the second folding surface, and when the first folding surface is folded relative to the first insulating surface and the second folding surface is folded relative to the second insulating surface, the sealing coating is bonded between the first folding surface and the second folding surface. After the insulating film is assembled with the pole core, the pole core can be insulated and sealed, and the side edge of the insulating film is not easy to open, so that the self-sealing property is better, and the liquid leakage condition can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to an insulating film, a single battery, a battery pack and a vehicle. Background Art

[0002] The insulating film in the related art is usually used to cover the outer peripheral surface of the pole core to isolate the pole core and the shell of the single battery to avoid short circuit caused by direct contact between the pole core and the shell.

[0003] Among them, the insulating film in the related technology is connected to the cover plate by hot melt at a position close to the cover plate to play a fixing role, but since the side of the insulating film itself cannot be fixed by hot melt, the side of the insulating film is only fixed between the pole core and the shell after folding. This setting cannot effectively seal and fix the side of the insulating film, which may easily cause the side of the insulating film to open and leak. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an insulating film, which can insulate and seal the pole core after being assembled with the pole core, and the side of the insulating film is not easy to open, and the self-sealing property is better, thereby effectively avoiding leakage.

[0005] The utility model also provides a single cell having the insulating film.

[0006] The utility model also provides a battery pack having the above-mentioned single battery.

[0007] The utility model also provides a vehicle with the battery pack.

[0008] In order to achieve the above-mentioned purpose, according to the first aspect embodiment of the utility model, an insulating film is proposed, including: an insulating base layer, the insulating base layer including a first insulating surface, a second insulating surface, a first folding surface and a second folding surface, the first insulating surface and the second insulating surface are suitable for being arranged on opposite sides of the pole core, and the first folding surface is connected to the end of the first insulating surface, and the second folding surface is connected to the end of the second insulating surface; a sealing coating, the sealing coating is arranged on at least one of the first folding surface and the second folding surface, when the first folding surface is folded relative to the first insulating surface and the second folding surface is folded relative to the second insulating surface, the sealing coating is bonded between the first folding surface and the second folding surface.

[0009] According to the embodiment of the utility model, the insulating film can insulate and seal the pole core after being assembled with the pole core. The side of the insulating film is not easy to open, and the self-sealing property is better, thereby effectively avoiding leakage.

[0010] According to some embodiments of the present invention, the sealing coating extends along the length direction of the first folding surface and / or the length direction of the second folding surface.

[0011] According to some embodiments of the present invention, the sealing coating extends from one end to the other end of the first folding surface in the length direction; and / or the sealing coating extends from one end to the other end of the second folding surface in the length direction.

[0012] According to some embodiments of the present invention, the sealing coating includes a plurality of sub-coatings, and the plurality of sub-coatings are arranged at intervals along the length direction of the first folding surface and / or the length direction of the second folding surface.

[0013] According to some embodiments of the present invention, the width of the sealing coating is 1 mm to 10 mm.

[0014] According to some embodiments of the utility model, the distance between the sealing coating and the side of the first folding surface away from the first insulating surface is A, and A is 1mm~5mm; and / or, the distance between the sealing coating and the side of the second folding surface away from the second insulating surface is B, and B is 1mm~5mm.

[0015] According to some embodiments of the present invention, the thickness of the insulating base layer is 0.05 mm to 0.5 mm; and / or the thickness of the sealing coating layer is 5 μm to 50 μm.

[0016] According to some embodiments of the present invention, the insulating base layer further includes: a first notch portion, the first notch portion is arranged between the first insulating surface and the first folding surface; and a second notch portion, the second notch portion is arranged between the second insulating surface and the second folding surface.

[0017] According to some embodiments of the present invention, the insulating base layer further includes: a third insulating surface, the third insulating surface is arranged on one side of the pole core, and the third insulating surface is respectively connected to the first insulating surface and the second insulating surface.

[0018] According to some embodiments of the utility model, the insulating base layer also includes: a third folding surface, which is arranged at the end of the third insulating surface, and when the third folding surface is folded relative to the third insulating surface, the third folding surface is folded on the side of the first folding surface and the second folding surface facing away from the pole core.

[0019] According to some embodiments of the present invention, a plurality of wetting holes are constructed on the third insulating surface, and the wetting holes penetrate through the third insulating surface.

[0020] According to the second aspect of the present invention, a single cell is provided. The single cell comprises: a shell; a pole core, wherein the pole core is arranged in the shell; and an insulating film according to the first aspect of the present invention, wherein the insulating film covers the pole core.

[0021] According to the single cell battery described in the second embodiment of the utility model, by utilizing the insulating film described in the first embodiment of the utility model, the insulating film can insulate and seal the pole core after being assembled with the pole core. The side of the insulating film is not easy to open, and the self-sealing property is better, thereby effectively avoiding leakage.

[0022] According to some embodiments of the present invention, the inner peripheral wall of the shell is coated with an insulating layer.

[0023] According to some embodiments of the present invention, the single battery further includes: an adhesive fixture, which is disposed between the insulating film and the shell, and is connected to at least the first folding surface and the second folding surface respectively.

[0024] According to a third aspect of the present invention, a battery pack is provided. The battery pack includes a single cell according to the second aspect of the present invention.

[0025] According to the battery pack described in the embodiment of the third aspect of the utility model, by utilizing the single battery described in the embodiment of the second aspect of the utility model, the side of the insulating film is not easy to open, the self-sealing property is better, and leakage can be effectively avoided.

[0026] According to a fourth aspect of the present invention, a vehicle is provided. The vehicle includes a battery pack according to the third aspect of the present invention.

[0027] According to the vehicle described in the fourth embodiment of the utility model, by utilizing the battery pack described in the third embodiment of the utility model, the side of the insulating film is not easy to open, the self-sealing property is better, and leakage can be effectively avoided.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic structural diagram of a single cell according to an embodiment of the utility model;

[0031] Figure 2 is a schematic structural diagram of an insulating film according to an embodiment of the utility model;

[0032] Figure 3 is another structural schematic diagram of the insulating film according to an embodiment of the utility model;

[0033] Figure 4 It is a schematic structural diagram of an insulating film according to another embodiment of the utility model.

[0034] Reference numerals:

[0035] 1. Insulating film; 2. Single cell;

[0036] 100, insulating base layer; 110, first insulating surface; 120, second insulating surface; 130, first folding surface; 140, second folding surface; 150, third insulating surface; 151, wetting hole; 160, third folding surface; 170, first notched portion; 180, second notched portion;

[0037] 200, sealing coating; 210, sub-coating;

[0038] 300, core. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0042] In the description of the present invention, "multiple" means two or more, and "several" means one or more.

[0043] The insulating film 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0044] like Figure 3 and Figure 4 As shown, the insulating film 1 according to the embodiment of the present invention includes an insulating base layer 100 and a sealing coating layer 200 .

[0045] The insulating base layer 100 includes a first insulating surface 110, a second insulating surface 120, a first folding surface 130 and a second folding surface 140. The first insulating surface 110 and the second insulating surface 120 are suitable for being arranged on opposite sides of the pole core 300, and the first folding surface 130 is connected to the end of the first insulating surface 110, and the second folding surface 140 is connected to the end of the second insulating surface 120. The sealing coating 200 is arranged on at least one of the first folding surface 130 and the second folding surface 140. When the first folding surface 130 is folded relative to the first insulating surface 110 and the second folding surface 140 is folded relative to the second insulating surface 120, the sealing coating 200 is bonded between the first folding surface 130 and the second folding surface 140.

[0046] Among them, the insulating base layer 100 can be made of one material, used to wrap the pole core 300 to perform an insulating function, and the sealing coating 200 is made of another material, and the sealing coating 200 is a heat-sensitive or pressure-sensitive functional coating, which can exhibit strong adhesion after melting at high temperature and cooling or pressurizing. In this way, applying high temperature or pressure during the assembly of the single battery cell can soften the sealing coating 200 and produce a strong adhesion effect, and after removing the high temperature or pressure, the first folding surface 130 and the second folding surface 140 are bonded and fixed.

[0047] The first insulating surface 110 and the second insulating surface 120 may be located on opposite sides of the pole core 300 in the thickness direction, that is, the first insulating surface 110 and the second insulating surface 120 may respectively cover two large surfaces of the pole core 300 .

[0048] According to the insulating film 1 of the embodiment of the utility model, by setting the sealing coating 200 on at least one of the first folding surface 130 and the second folding surface 140, that is, the sealing coating 200 can be set on the first folding surface 130, or the sealing coating 200 can be set on the second folding surface 140, or the sealing coating 200 can be set on the first folding surface 130 and the second folding surface 140. In this way, when the single battery cell is assembled, the first folding surface 130 and the second folding surface 140 are folded and at least partially overlapped, the sealing coating 200 can bond the overlapping part of the first folding surface 130 and the second folding surface 140, thereby achieving the bonding and fixing of the first folding surface 130 and the second folding surface 140, so that the side of the insulating film 1 can be bonded and sealed, and the side of the insulating film 1 can be self-sealed and fixed, which effectively avoids the situation that the side of the insulating film 1 is opened and causes corrosion and leakage, and the insulation effect of the pole core 300 and the inner wall of the shell of the single battery 2 is better.

[0049] In this way, the insulating film 1 according to the embodiment of the utility model can insulate and seal the pole core 300 after being assembled with the pole core 300. The side of the insulating film 1 is not easy to open, and the self-sealing property is better, thereby effectively avoiding leakage.

[0050] In some specific embodiments of the present invention, the insulating base layer 100 can be made of materials such as polyethylene, polypropylene, polyethylene terephthalate, etc. The above materials have the characteristics of high temperature resistance, good chemical stability, corrosion resistance, etc., and have good hot melt properties, which can increase the connection effect with structural parts, and at the same time can have an insulating effect and facilitate the coating of the sealing coating 200.

[0051] Furthermore, the sealing coating 200 can be made of materials such as thermoplastic polyurethane (TPU), ethylene-vinyl acetate copolymer (EVA), copolyamide (PA), copolyester (PES), high-density polyethylene (HDPE), low-density polyethylene (LDPE), styrene block copolymer (SBC) or amorphous polyolefin (APO), so that the sealing coating 200 can play a bonding role to the first folding surface 130 and the second folding surface 140 after being subjected to certain external effects.

[0052] In some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the sealing coating 200 extends along the length direction of the first folding surface 130 and / or the length direction of the second folding surface 140 .

[0053] Specifically, the sealing coating 200 disposed on the first folding surface 130 extends along the length direction of the first folding surface 130 , and the sealing coating 200 disposed on the second folding surface 140 extends along the length direction of the second folding surface 140 .

[0054] Such arrangement, on the one hand, can make the extension length of the sealing coating 200 longer, which is beneficial to improving the bonding stability between the first folding surface 130 and the second folding surface 140, that is, the sealing coating 200 can more stably bond and fix the first folding surface 130 and the second folding surface 140; on the other hand, it can make the sealing coating 200 better cover the first folding surface 130 along the length direction of the first folding surface 130, or better cover the second folding surface 140 along the length direction of the second folding surface 140. The sealing coating 200 has a better sealing effect between the first folding surface 130 and the second folding surface 140, and can more effectively avoid leakage of the single cell.

[0055] In addition, it should be noted that a plurality of sealing coatings 200 may be provided on the first folding surface 130, and the plurality of sealing coatings 200 are arranged at intervals along the width direction of the first folding surface 130, or a plurality of sealing coatings 200 may be provided on the second folding surface 140, and the plurality of sealing coatings 200 are arranged at intervals along the width direction of the second folding surface 140. In this way, the plurality of sealing coatings 200 may perform multi-layer connection and sealing between the first folding surface 130 and the second folding surface 140, which is beneficial to improve the connection strength and sealing between the first folding surface 130 and the second folding surface 140.

[0056] Furthermore, if Figure 3 As shown, the sealing coating 200 extends from one end to the other end of the length direction of the first folding surface 130; and / or, the sealing coating 200 extends from one end to the other end of the length direction of the second folding surface 140.

[0057] That is to say, when the sealing coating 200 is set on the first folding surface 130, the sealing coating 200 extends from one end to the other end of the length direction of the first folding surface 130; when the sealing coating 200 is set on the second folding surface 140, the sealing coating 200 extends from one end to the other end of the length direction of the second folding surface 140. In this way, the sealing coating 200 can completely cover the first folding surface 130 along the length direction of the first folding surface 130, or the sealing coating 200 can completely cover the second folding surface 140 along the length direction of the second folding surface 140, which is beneficial to improve the sealing and connection reliability between the first folding surface 130 and the second folding surface 140.

[0058] In some specific embodiments of the present invention, Figure 4 As shown, the sealing coating 200 includes a plurality of sub-coatings 210 , and the plurality of sub-coatings 210 are arranged at intervals along the length direction of the first folding surface 130 and / or the length direction of the second folding surface 140 .

[0059] That is to say, when the sealing coating 200 is set on the first folding surface 130, multiple sub-coatings 210 are arranged at intervals along the length direction of the first folding surface 130, and when the sealing coating 200 is set on the second folding surface 140, multiple sub-coatings 210 are arranged at intervals along the length direction of the second folding surface 140, that is, the sealing coating 200 is divided into multiple spaced and segmented sub-coatings 210, which can reduce the coating area of ​​the sealing coating 200 and facilitate the coating arrangement. At the same time, the connection strength between the first folding surface 130 and the second folding surface 140 can be ensured, so as to better seal the first folding surface 130 and the second folding surface 140 and avoid leakage of the single battery cell.

[0060] In some specific embodiments of the present invention, the width of the sealing coating 200 is 1 mm to 10 mm.

[0061] For example, the width of the sealing coating 200 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. In this way, on the one hand, the width of the sealing coating 200 can be prevented from being too narrow, so as to ensure that the sealing coating 200 can reliably bond and fix the first folding surface 130 and the second folding surface 140 to ensure the self-sealing property of the insulating film 1, and on the other hand, the width of the sealing coating 200 can be prevented from being too wide, so as to facilitate coating and save the material of the sealing coating 200.

[0062] In some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the distance between the sealing coating 200 and the side of the first folding surface 130 away from the first insulating surface 110 is A, and A is 1mm to 5mm; and / or, the distance between the sealing coating 200 and the side of the second folding surface 140 away from the second insulating surface 120 is B, and B is 1mm to 5mm. Figure 3 and Figure 4 As shown in the figure, the sealing coating 200 is arranged on the first folding surface 130, and the distance A is schematically shown here.

[0063] For example, the distance A between the sealing coating 200 and the first folding surface 130 away from the first insulating surface 110 can be 1mm, 2mm, 3mm, 4mm or 5mm, and the distance B between the sealing coating 200 and the second folding surface 140 away from the second insulating surface 120 can be 1mm, 2mm, 3mm, 4mm or 5mm.

[0064] The side of the first folding surface 130 away from the first insulating surface 110 refers to the side away from the first insulating surface 110 along the width direction of the first folding surface 130 .

[0065] Such arrangement can, on the one hand, prevent the sealing coating 200 from being too far away from the edge of the first folding surface 130. When the first folding surface 130 and the second folding surface 140 are folded and overlapped, the sealing coating 200 can be located between the overlapping area of ​​the first folding surface 130 and the second folding surface 140, so as to facilitate the use of the sealing coating 200 to connect the first folding surface 130 and the second folding surface 140. On the other hand, it can prevent the sealing coating 200 from being too close to the edge of the first folding surface 130. After the first folding surface 130 and the second folding surface 140 overlap and are squeezed, the sealing coating 200 will not overflow from the edge of the overlapping area of ​​the first folding surface 130 and the second folding surface 140.

[0066] In some specific embodiments of the present invention, the thickness of the insulating base layer 100 is 0.05 mm to 0.5 mm. The thickness of the insulating base layer 100 is moderate, which can ensure that the strength of the insulating base layer 100 is sufficient to wrap the pole core 300 and meet the requirements of hot-melt connection with other structural parts, and can avoid the thickness of the insulating base layer 100 being too thick, which will not cause the volume of the single battery 2 to be too large and is conducive to cost saving.

[0067] In some specific embodiments of the present invention, the thickness of the sealing coating 200 is 5μm to 50μm. This can prevent the sealing coating 200 from being too thin, so that the sealing coating 200 can stably bond the first folding surface 130 and the second folding surface 140 together. On the other hand, it can prevent the sealing coating 200 from being too thick, which is beneficial to reducing the volume of the insulating film 1 and the pole core 300 after assembly.

[0068] In some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the insulating base layer 100 further includes a first notch portion 170 and a second notch portion 180 .

[0069] The first notch portion 170 is disposed between the first insulating surface 110 and the first folding surface 130 , and the second notch portion 180 is disposed between the second insulating surface 120 and the second folding surface 140 .

[0070] Among them, the structural strength of the first notch portion 170 and the structural strength of the second notch portion 180 can be smaller than the structural strength of the remaining parts of the insulating base layer 100. In this way, when the first folding surface 130 is folded relative to the first insulating surface 110, the insulating base layer 100 can fold the first folding surface 130 along the first notch portion 170, and when the second folding surface 140 is folded relative to the second insulating surface 120, the insulating base layer 100 can fold the second folding surface 140 along the second notch portion 180. The folding is more convenient, which is conducive to simplifying the assembly steps of the insulating film 1 and the pole core 300.

[0071] In some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, the insulating base layer 100 further includes a third insulating surface 150 .

[0072] The third insulating surface 150 is disposed on one side of the pole core 300 , and the third insulating surface 150 is connected to the first insulating surface 110 and the second insulating surface 120 , respectively.

[0073] For example, the first folding surface 130 can be arranged at opposite ends of the length direction of the first insulating surface 110, the second folding surface 140 can be arranged at opposite ends of the length direction of the second insulating surface 120, and the third insulating surface 150 can be connected between one side of the width direction of the first insulating surface 110 and one side of the width direction of the second insulating surface 120, so that the first insulating surface 110, the second insulating surface 120 and the third insulating surface 150 can be connected into a whole, and after the insulating surface and the pole core 300 are assembled, the third insulating surface 150 can cover the side of the pole core 300, for example, the third insulating surface 150 can cover the bottom of the pole core 300.

[0074] Furthermore, if Figure 3 and Figure 4 As shown, the insulating base layer 100 further includes a third folding surface 160 .

[0075] The third folding surface 160 is disposed at an end of the third insulating surface 150 , and when the third folding surface 160 is folded relative to the third insulating surface 150 , the third folding surface 160 is folded on a side of the first folding surface 130 and the second folding surface 140 that faces away from the pole core 300 .

[0076] That is to say, when the insulating surface and the pole core 300 are assembled, the third folding surface 160 is folded on the outside of the first folding surface 130 and the second folding surface 140, wherein the third folding surface 160 can be fixed by a fixing member, for example, the third folding surface 160 can be fixed by a tape, so that the third folding surface 160 can cover one end of the first folding surface 130 and the second folding surface 140 to seal the bottom of the pole core 300, further improving the self-sealing property of the insulating film 1, and more effectively insulating the pole core 300 and the shell.

[0077] In some specific embodiments of the present invention, Figure 3 and Figure 4 As shown, a plurality of wetting holes 151 are constructed on the third insulating surface 150 , and the wetting holes 151 penetrate the third insulating surface 150 , so that the bottom of the pole core 300 can be connected to the outside through the wetting holes 151 , so that the electrolyte can flow through the wetting holes 151 .

[0078] The following describes a single cell 2 according to an embodiment of the present utility model with reference to the accompanying drawings. Figure 1 As shown, the single battery 2 includes a shell, a pole core 300 and an insulating film 1 according to the above embodiment of the utility model, the pole core 300 is arranged in the shell, and the insulating film 1 covers the pole core 300. Among them, the insulating film 1 covers the pole core 300 after being folded, and the insulating film 1 does not cover the top of the pole core 300, and the side of the insulating film 1 close to the top of the pole core 300 can be hot-melt connected with the cover plate spacer.

[0079] According to the single cell battery 2 of the embodiment of the utility model, by utilizing the insulating film 1 according to the above-mentioned embodiment of the utility model, the insulating film 1 can insulate and seal the pole core 300 after being assembled with the pole core 300. The side of the insulating film 1 is not easy to open, and the self-sealing property is better, thereby effectively avoiding leakage.

[0080] In some specific embodiments of the present invention, the inner wall of the shell is coated with an insulating layer, so that the insulating layer can more effectively insulate the pole core 300 and the shell, and further prevent the inner wall of the shell from being corroded due to leakage of the pole core 300.

[0081] In some specific embodiments of the present invention, the single battery 2 further includes an adhesive fixing member.

[0082] The adhesive fixing member is disposed between the insulating film 1 and the housing, and the adhesive fixing member is connected to at least the first folding surface 130 and the second folding surface 140 respectively.

[0083] Among them, the adhesive fixing part can completely cover the insulating film 1, or the adhesive fixing part can only fix the connection between the first folding surface 130 and the second folding surface 140 to improve the connection stability of the first folding surface 130 and the second folding surface 140, more effectively avoid the insulating film 1 from opening at the connection between the first folding surface 130 and the second folding surface 140, and the insulating film 1 has better self-sealing properties.

[0084] A battery pack according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The battery pack includes a single battery 2 according to the above embodiment of the present invention.

[0085] According to the battery pack of the embodiment of the utility model, by using the single battery 2 according to the above embodiment of the utility model, the side of the insulating film 1 is not easy to open, the self-sealing property is better, and leakage can be effectively avoided.

[0086] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes a battery pack according to the above embodiment of the present invention.

[0087] According to the vehicle of the embodiment of the utility model, by utilizing the battery pack according to the above embodiment of the utility model, the side of the insulating film 1 is not easy to open, and the self-sealing property is better, thereby effectively avoiding leakage.

[0088] The insulating film 1, the single cell 2, the battery pack and other structures and operations of the vehicle according to the embodiment of the utility model are well known to ordinary technicians in this field and will not be described in detail here.

[0089] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0090] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An insulating film (1), characterized in that: include: An insulating base layer (100), the insulating base layer (100) comprising a first insulating surface (110), a second insulating surface (120), a first folding surface (130) and a second folding surface (140), the first insulating surface (110) and the second insulating surface (120) being suitable for being arranged on opposite sides of a pole core (300), the first folding surface (130) being connected to an end of the first insulating surface (110), and the second folding surface (140) being connected to an end of the second insulating surface (120); A sealing coating (200), wherein the sealing coating (200) is provided on at least one of the first folding surface (130) and the second folding surface (140); when the first folding surface (130) is folded relative to the first insulating surface (110) and the second folding surface (140) is folded relative to the second insulating surface (120), the sealing coating (200) is bonded between the first folding surface (130) and the second folding surface (140).

2. The insulating film (1) according to claim 1, characterized in that The sealing coating (200) extends along the length direction of the first folding surface (130) and / or the length direction of the second folding surface (140).

3. The insulating film (1) according to claim 2, characterized in that The sealing coating (200) extends from one end to the other end in the length direction of the first folding surface (130); and / or The sealing coating (200) extends from one end to the other end of the second folding surface (140) in the length direction.

4. The insulating film (1) according to claim 2, characterized in that The sealing coating (200) comprises a plurality of sub-coatings (210), and the plurality of sub-coatings (210) are arranged at intervals along the length direction of the first folding surface (130) and / or the length direction of the second folding surface (140).

5. The insulating film (1) according to claim 2, characterized in that The width of the sealing coating (200) is 1 mm to 10 mm.

6. The insulating film (1) according to claim 2, characterized in that The distance between the sealing coating (200) and the side of the first folding surface (130) away from the first insulating surface (110) is A, and A is 1 mm to 5 mm; and / or The distance between the sealing coating (200) and the side of the second folding surface (140) away from the second insulating surface (120) is B, and B is 1 mm to 5 mm.

7. The insulating film (1) according to claim 1, characterized in that The thickness of the insulating base layer (100) is 0.05 mm to 0.5 mm; and / or The sealing coating (200) has a thickness of 5 μm to 50 μm.

8. The insulating film (1) according to claim 1, characterized in that The insulating base layer (100) further comprises: a first notched portion (170), the first notched portion (170) being disposed between the first insulating surface (110) and the first folding surface (130); A second notched portion (180), wherein the second notched portion (180) is disposed between the second insulating surface (120) and the second folding surface (140).

9. The insulating film (1) according to claim 1, characterized in that The insulating base layer (100) further comprises: A third insulating surface (150), the third insulating surface (150) is arranged on one side of the pole core (300), and the third insulating surface (150) is respectively connected to the first insulating surface (110) and the second insulating surface (120).

10. The insulating film (1) according to claim 9, characterized in that The insulating base layer (100) further comprises: A third folding surface (160), the third folding surface (160) being arranged at an end of the third insulating surface (150), and when the third folding surface (160) is folded relative to the third insulating surface (150), the third folding surface (160) is folded on a side of the first folding surface (130) and the second folding surface (140) that is away from the pole core (300).

11. The insulating film (1) according to claim 9, characterized in that A plurality of wetting holes (151) are constructed on the third insulating surface (150), and the wetting holes (151) penetrate the third insulating surface (150).

12. A single cell (2), characterized in that: include: case; A pole core (300), wherein the pole core (300) is disposed in the shell; According to any one of claims 1 to 11, the insulating film (1) covers the pole core (300).

13. The single cell (2) according to claim 12, characterized in that: The inner peripheral wall of the housing is coated with an insulating layer.

14. The single cell (2) according to claim 12, characterized in that: Also includes: An adhesive fixing member is provided between the insulating film (1) and the shell, and the adhesive fixing member is connected to at least the first folding surface (130) and the second folding surface (140) respectively.

15. A battery pack, characterized in that: It comprises a single cell (2) according to any one of claims 12 to 14.

16. A vehicle, characterized in that: Comprising the battery pack according to claim 15.

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