Insulating film, battery, battery module, battery pack and electric equipment

Abstract

The embodiment of the utility model provides an insulating film, a battery, a battery module, a battery pack and electric equipment. The insulating film comprises a first coating part and a folding wing part, the first coating part is used for coating at least part of large surfaces of the battery cells, and the folding wing part is configured to be attached to one side, far away from the battery cells, of at least part of the first coating part, so that a first gap is formed between the large surfaces of the two adjacent battery cells; through the arrangement of the folding wing part, the first gap between the large surfaces of the battery cells can be more efficiently controlled, so that the cycle performance of the pack body when the interior of the battery pack is expanded is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to an insulating film, a battery, a battery module, a battery pack and electrical equipment. Background Art

[0002] In the prior art, the gaps between the cells of the battery pack need to be controlled during the stacking process to ensure the cycle performance of the battery pack when the battery pack expands. However, the gaps between the cells are currently set by auxiliary positioning tooling, which cannot effectively control the gaps between the cells, resulting in poor cycle performance of the battery pack when the battery pack expands.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] One object of the utility model is to provide a new technical solution for an insulating film, a battery, a battery module, a battery pack and an electrical device.

[0005] According to a first aspect of the present utility model, an insulating film is provided, wherein the insulating film comprises:

[0006] A first covering portion, the first covering portion is used to cover at least a portion of a large surface of the battery core;

[0007] The folded wing portion is configured to be attached to at least a portion of the first covering portion on a side away from the battery core, so as to form a first gap between the large surfaces of two adjacent battery cores.

[0008] Optionally, the folding wing portion includes a first folding wing portion and a second folding wing portion, the first folding wing portion is configured to fit onto one end of the first covering portion, and the second folding wing portion is configured to fit onto the other end of the first covering portion to form a second gap between the first folding wing portion and the second folding wing portion.

[0009] Optionally, the folding wing portion further includes a third folding wing portion and a fourth folding wing portion, the third folding wing portion being configured to be attached to a side of the first folding wing portion away from the first covering portion, and the fourth folding wing portion being configured to be attached to a side of the second folding wing portion away from the first covering portion.

[0010] Optionally, the insulating film further comprises a second covering portion and a first fold;

[0011] The second covering portion is connected to the first covering portion as a whole, and the second covering portion is used to cover at least a portion of the end surface of the battery core;

[0012] The first fold is disposed between the second covering portion and the first covering portion.

[0013] Optionally, the insulating film further includes a third covering portion and a second fold;

[0014] The third covering portion is connected to the second covering portion as a whole, and the third covering portion is used to cover at least part of the side surface of the battery core;

[0015] The second fold is disposed between the third covering portion and the second covering portion.

[0016] Optionally, the insulating film further includes a third fold and an opening, the third fold is arranged between the third covering portion and the folding wing portion, and the opening is arranged between the first covering portion and the folding wing portion.

[0017] According to a second aspect of the present utility model, a battery is provided, comprising:

[0018] A battery cell, wherein the battery cell comprises a large surface;

[0019] The insulating film as described in any one of the first aspects is used to cover at least a portion of the large surface.

[0020] Optionally, the battery cell further includes an end face and a side face, and the insulating film covers at least a portion of the end face and at least a portion of the side face.

[0021] Optionally, the battery further comprises a large surface film, and the large surface film is used to cover at least a portion of the large surface and at least a portion of the side surface.

[0022] Optionally, the battery cell further includes a pole;

[0023] The insulating film further includes a first opening configured to expose the pole.

[0024] Optionally, the battery cell further includes a liquid injection hole;

[0025] The insulating film further includes a second opening configured to expose the liquid injection hole.

[0026] Optionally, the battery cell further includes an explosion-proof valve;

[0027] The insulating film further includes a third opening configured to expose the explosion-proof valve.

[0028] According to a third aspect of the present invention, a battery module is provided, comprising a battery as described in any one of the second aspects.

[0029] According to a fourth aspect of the present invention, a battery pack is provided, comprising a tray, an upper cover and the battery module as described in the third aspect.

[0030] According to the fifth aspect of the utility model, an electrical device is provided, comprising an insulating film as described in any one of the first aspect, or a battery as described in any one of the second aspect, or a battery module as described in the third aspect, or a battery pack as described in the fourth aspect.

[0031] According to the insulating film provided by the embodiment of the utility model, the insulating film includes a first covering portion and a folding wing portion, the first covering portion is used to cover at least a portion of a large surface of the battery cell, and the folding wing portion is configured to fit onto at least a portion of the first covering portion on a side away from the battery cell, so as to form a first gap between the large surfaces of two adjacent battery cells; through the provision of the folding wing portion, the first gap between the large surfaces of the battery cells can be more efficiently controlled, thereby significantly improving the cycle performance of the package when the battery pack expands.

[0032] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0034] Figure 1 It is a structural schematic diagram of a battery module in one embodiment of the utility model.

[0035] Figure 2 It is a schematic structural diagram of an insulating film in one embodiment of the utility model.

[0036] Figure 3 It is a schematic structural diagram of an insulating film in another embodiment of the utility model.

[0037] Figure 4 It is a schematic diagram of the structure of a battery cell in one embodiment of the utility model.

[0038] Figure 5 It is a schematic diagram of the structure of a battery in one embodiment of the utility model.

[0039] Description of reference numerals:

[0040] 1. Insulating film; 11. First covering portion; 12. Folding wing portion; 121. First folding wing portion; 122. Second folding wing portion; 123. Third folding wing portion; 124. Fourth folding wing portion; 13. Second covering portion; 131. First opening; 132. Fourth opening; 133. Second opening; 134. Third opening; 14. Third covering portion; 15. First fold; 16. Second fold; 17. Third fold; 18. Opening;

[0041] 2. Battery cell; 21. Large surface; 22. End surface; 221. First pole; 222. Second pole; 223. Liquid injection hole; 224. Explosion-proof valve; 23. Side surface;

[0042] 3. The first gap;

[0043] 4. Second gap;

[0044] 5. Large facial mask. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0046] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0047] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0048] In the description of the present application, 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", "clockwise", "counterclockwise", "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 application 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 application.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] According to an embodiment of the present application, an insulating film 1 is provided. Figures 1 to 5 The insulating film 1 includes a first covering portion 11 and a folding wing portion 12, wherein the first covering portion 11 is used to cover at least a portion of a large surface 21 of the battery cell 2, and the folding wing portion 12 is configured to adhere to at least a portion of the first covering portion 11 away from the side of the battery cell 2 to form a first gap 3 between the large surfaces 21 of two adjacent battery cells 2.

[0052] Specifically, Figure 1 As shown, after the first covering portion 11 of the insulating film 1 of the embodiment of the present application covers at least a portion of the large surface 21 of the battery cell 2, the orthographic projection of the folding wing portion 12 toward the large surface 21 of the battery cell 2 falls on the first covering portion 11, so that the folding wing portion 12 is attached to at least a portion of the first covering portion 11 away from the side of the battery cell 2.

[0053] Thus, in the stacking process of multiple battery cells 2, the folded wing portion 12 can form a first gap 3 of a fixed size between the large surfaces 21 of two adjacent battery cells 2, and the first gap 3 is configured to be equal to the gap required between the large surfaces 21 of two adjacent battery cells 2, that is, the thickness dimension of the folded wing portion 12 on the large surfaces 21 of two adjacent battery cells 2 is equal to the dimension of the first gap 3.

[0054] Furthermore, the embodiment of the present application can achieve control of the first gap 3 between the large surfaces 21 of two adjacent battery cells 2 only by changing the thickness of the folding wing portion 12, thereby effectively improving the control efficiency and control accuracy of the first gap 3 and significantly improving the cycle performance of the battery pack when the inside of the battery pack expands.

[0055] In addition, compared with the prior art that uses auxiliary positioning tooling to control the first gap 3, the present application only requires further structural optimization based on the original coating of the insulating film 1 on the battery cell 2, without adding additional materials and production equipment, effectively reducing the manufacturing difficulty and production cost of the battery pack.

[0056] Furthermore, the number of the battery cells 2 described in the present application can be two, three or more, and those skilled in the art can choose according to actual needs, and the present application does not make any specific restrictions here.

[0057] Optionally, the folding wing portion 12 includes a first folding wing portion 121 and a second folding wing portion 122, the first folding wing portion 121 is configured to fit onto one end of the first covering portion 11, and the second folding wing portion 122 is configured to fit onto the other end of the first covering portion 11, so as to form a second gap 4 between the first folding wing portion 121 and the second folding wing portion 122.

[0058] Specifically, Figure 1 and Figure 2 As shown, the insulating film 1 described in the embodiment of the present application is provided with two groups, and the two groups of the insulating films 1 respectively cover the two ends of the battery cell 2.

[0059] Among them, since the two groups of the insulating films 1 respectively include two pairs of the folded wing portions 12, the stability and reliability of the first gap 3 between the large surfaces 21 of the two adjacent battery cells 2 can be effectively guaranteed. In addition, since the two pairs of the folded wing portions 12 also include two first folded wing portions 121 and two second folded wing portions 122, and the two first folded wing portions 121 and the two second folded wing portions 122 are respectively located on the two large surfaces 21 of the battery cell 2, the stability and reliability of the first gap 3 between the large surfaces 21 of the two adjacent battery cells 2 can be further improved.

[0060] Of course, the folding wing portion 12 may also include only a first folding wing portion 121 and a second folding wing portion 122, so as to form the first gap 3 only on one large surface 21 of the battery cell 2, thereby further reducing the production cost of the battery pack.

[0061] In addition, in the embodiment of the present application, the first folding wing portion 121 is attached to one end of the first covering portion 11, and the second folding wing portion 122 is attached to the other end of the first covering portion 11, so that the second gap 4 is formed between the first folding wing portion 121 and the second folding wing portion 122. The second gap 4 is the difference between the long side dimension of the end face 22 of the battery cell 2 and the sum of the long side dimensions of the first folding wing portion 121 and the second folding wing portion 122.

[0062] Therefore, on the basis of satisfying the stability and reliability of the first gap 3, the embodiment of the present application can further reduce the production cost of the battery pack by increasing the size of the second gap 4, that is, by reducing the long side size of the first folding wing portion 121 and the second folding wing portion 122.

[0063] It should be noted that the long side of the end face 22 of the battery cell 2 is the intersection line of the end face 22 of the battery cell 2 and the large surface 21 of the battery cell 2 , and the long side of the first folding wing portion 121 and the long side of the second folding wing portion 122 are parallel to the long side of the end face 22 of the battery cell 2 .

[0064] Optionally, the folding wing portion 12 also includes a third folding wing portion 123 and a fourth folding wing portion 124, the third folding wing portion 123 is configured to be attached to the side of the first folding wing portion 121 away from the first covering portion 11, and the fourth folding wing portion 124 is configured to be attached to the side of the second folding wing portion 122 away from the first covering portion 11.

[0065] Specifically, Figure 3 As shown, after the first covering portion 11 of the insulating film 1 described in the embodiment of the present application covers at least a portion of the large surface 21 of the battery cell 2, the orthographic projection of the first folding wing portion 121 toward the large surface 21 of the battery cell 2 falls on the first covering portion 11, and the orthographic projection of the third folding wing portion 123 toward the large surface 21 of the battery cell 2 falls on the first folding wing portion 121, so that the first covering portion 11, the first folding wing portion 121 and the third folding wing portion 123 are stacked; the orthographic projection of the second folding wing portion 122 toward the large surface 21 of the battery cell 2 falls on the first covering portion 11, and the orthographic projection of the fourth folding wing portion 124 toward the large surface 21 of the battery cell 2 falls on the second folding wing portion 122, so that the first covering portion 11, the second folding wing portion 122 and the fourth folding wing portion 124 are stacked.

[0066] Therefore, the embodiment of the present application can meet the requirements of the first gap 3 between the large surfaces 21 of the battery cells 2 of different battery packs by adding the third folding wing portion 123 and the fourth folding wing portion 124, thereby effectively improving the applicability of the insulating film 1.

[0067] Of course, the folding wing portion 12 can also be set to multiple, so that the present application can meet the requirements of the first gap 3 between the large surfaces 21 of the battery cells 2 of various different battery packs through different numbers of folding wing portions 12. Technical personnel in this field can make a choice according to actual needs, and the present application does not make any specific restrictions here.

[0068] Optionally, the insulating film 1 also includes a second covering portion 13 and a first fold 15; the second covering portion 13 is connected to the first covering portion 11 as a whole, and the second covering portion 13 is used to cover at least part of the end surface 22 of the battery cell 2; the first fold 15 is arranged between the second covering portion 13 and the first covering portion 11.

[0069] Specifically, Figures 1 to 5 As shown, a first fold 15 is provided between the first covering portion 11 and the second covering portion 13 of the insulating film 1 described in the embodiment of the present application. The first fold 15 can enable the second covering portion 13 to be folded along the intersection line of the end surface 22 of the battery cell 2 and the large surface 21 of the battery cell 2, thereby effectively ensuring that the second covering portion 13 covers at least a portion of the end surface 22 of the battery cell 2, thereby significantly improving the covering efficiency of the second covering portion 13.

[0070] Optionally, the insulating film 1 also includes a third covering portion 14 and a second fold 16; the third covering portion 14 is connected to the second covering portion 13 as a whole, and the third covering portion 14 is used to cover at least part of the side surface 23 of the battery cell 2; the second fold 16 is arranged between the third covering portion 14 and the second covering portion 13.

[0071] Specifically, Figures 1 to 5 As shown, there is a second fold 16 between the second covering portion 13 and the third covering portion 14 of the insulating film 1 described in the embodiment of the present application. The second fold 16 can enable the third covering portion 14 to be folded along the intersection line of the end surface 22 of the battery cell 2 and the side surface 23 of the battery cell 2, thereby effectively ensuring that the third covering portion 14 covers at least a portion of the side surface 23 of the battery cell 2, thereby significantly improving the covering efficiency of the third covering portion 14.

[0072] Optionally, the insulating film 1 further includes a third fold 17 and an opening 18 , wherein the third fold 17 is disposed between the third covering portion 14 and the folding wing portion 12 , and the opening 18 is disposed between the first covering portion 11 and the folding wing portion 12 .

[0073] Specifically, Figures 1 to 5 As shown, the insulating film 1 described in the embodiment of the present application has a third fold 17 between the third covering portion 14 and the folding wing portion 12, and an opening 18 between the first covering portion 11 and the folding wing portion 12. The third fold 17 and the opening 18 can make the positive projection of the folding wing portion 12 toward the large surface 21 of the battery cell 2 fall on the first covering portion 11, thereby effectively ensuring that the folding wing portion 12 is attached to at least a portion of the first covering portion 11 away from the side of the battery cell 2, thereby significantly improving the control efficiency of the first gap 3.

[0074] Of course, the third fold 17 described in the embodiment of the present application can also be arranged between the first covering portion 11 and the folding wing portion 12, and the opening 18 can also be arranged between the third covering portion 14 and the folding wing portion 12; or, the opening 18 is arranged between the first covering portion 11 and the folding wing portion 12 and between the third covering portion 14 and the folding wing portion 12, so that the folding wing portion 12 is separated from the first covering portion 11 and the third covering portion 14, thereby ensuring that the folding wing portion 12 is attached to at least part of the first covering portion 11 away from the side of the battery cell 2. Those skilled in the art can make a choice according to actual needs, and the present application does not make any specific restrictions here.

[0075] According to another embodiment of the present application, a battery is provided. The battery includes a battery cell 2 and the insulating film 1 described in the embodiment of the present application. The battery cell 2 includes a large surface 21 , and the insulating film 1 is used for covering at least a portion of the large surface 21 .

[0076] Specifically, Figure 4 and Figure 5 As shown, the embodiment of the present application covers at least a portion of the large surface 21 by the insulating film 1, that is, covers at least a portion of the large surface 21 of the battery cell 2 by the first covering portion 11 of the insulating film 1, so that the positive projection of the folding wing portion 12 toward the large surface 21 of the battery cell 2 falls on the first covering portion 11, and the folding wing portion 12 is attached to at least a portion of the first covering portion 11 away from the battery cell 2, effectively ensuring the gap requirement between the large surfaces 21 of two adjacent battery cells 2, thereby significantly improving the cycle performance of the package when the inside of the battery pack expands and the insulation performance of the large surface 21 of the battery cell 2.

[0077] Optionally, the battery cell 2 further includes an end surface 22 and a side surface 23 , and the insulating film 1 covers at least a portion of the end surface 22 and at least a portion of the side surface 23 .

[0078] Specifically, Figure 4 and Figure 5 As shown, in the embodiment of the present application, at least a portion of the end face 22 and at least a portion of the side face 23 are covered by the insulating film 1, that is, at least a portion of the end face 22 of the battery cell 2 is covered by the second covering portion 13 of the insulating film 1, and at least a portion of the side face 23 of the battery cell 2 is covered by the third covering portion 14 of the insulating film 1, thereby effectively ensuring the insulation performance of the end face 22 and the side face 23 of the battery cell 2.

[0079] Among them, since the end face 22 of the battery cell 2 is provided with components such as the first pole 221, the second pole 222, the injection hole 223 and the explosion-proof valve 224, in order to expose the first pole 221, the second pole 222, the injection hole 223 and the explosion-proof valve 224, the insulating film 1 should cover at least part of the end face 22, that is, the second covering portion 13 of the insulating film 1 covers at least part of the end face 22 of the battery cell 2.

[0080] Optionally, the battery further comprises a large surface mask 5 , and the large surface mask 5 is used to cover at least a portion of the large surface 21 and at least a portion of the side surface 23 .

[0081] Specifically, Figure 1 As shown, the embodiment of the present application covers at least a portion of the large surface 21, at least a portion of the end surface 22 and at least a portion of the side surface 23 by the insulating film 1, that is, at least a portion of the large surface 21 of the battery cell 2 is covered by the first covering portion 11 of the insulating film 1, at least a portion of the end surface 22 of the battery cell 2 is covered by the second covering portion 13 of the insulating film 1, at least a portion of the side surface 23 of the battery cell 2 is covered by the third covering portion 14 of the insulating film 1, and then at least a portion of the large surface 21 and at least a portion of the side surface 23 are covered by the large surface film 5, thereby effectively ensuring the insulation performance of the battery cell 2.

[0082] Among them, the thickness of the insulating film 1 is the same as the thickness of the large surface mask 5. The insulating film 1 and the large surface mask 5 jointly cover the large surface 21 and the side surface 23 of the battery cell 2, effectively ensuring the insulation performance of the large surface 21 and the side surface 23 of the battery cell 2.

[0083] Optionally, the battery cell 2 further includes a pole; the insulating film 1 further includes a first opening 131, and the first opening 131 is configured to expose the pole.

[0084] Specifically, Figures 1 to 5 As shown, the end surface 22 of the battery cell 2 in the embodiment of the present application is provided with a first pole 221 , and the second covering portion 13 of the insulating film 1 includes a first opening 131 .

[0085] Therefore, after the second covering portion 13 covers at least a portion of the end surface 22 of the battery cell 2 , the first pole 221 can be exposed from the first opening 131 , thereby effectively ensuring the performance of the first pole 221 and the insulation performance of the end surface 22 of the battery cell 2 .

[0086] In addition, the end surface 22 of the battery cell 2 is further provided with a second pole 222 , and the second covering portion 13 of the insulating film 1 further includes a fourth opening 132 .

[0087] Therefore, after the second covering portion 13 covers at least a portion of the end surface 22 of the battery cell 2 , the second pole 222 can be exposed from the fourth opening 132 , thereby effectively ensuring the performance of the second pole 222 and the insulation performance of the end surface 22 of the battery cell 2 .

[0088] Of course, the first pole 221 can also be exposed through the fourth opening 132, the second pole 222 can be exposed through the first opening 131, the first pole 221 can also be arranged on the large surface 21 or the side 23 of the battery cell 2, and the second pole 222 can also be arranged on the large surface 21 or the side 23 of the battery cell 2. Those skilled in the art can make a choice according to actual needs, and this application does not make any specific restrictions here.

[0089] Optionally, the battery core 2 further includes a liquid injection hole 223 ; the insulating film 1 further includes a second opening 133 , and the second opening 133 is configured to expose the liquid injection hole 223 .

[0090] Specifically, Figures 1 to 5 As shown, the end surface 22 of the battery cell 2 in the embodiment of the present application is provided with a liquid injection hole 223 , and the second covering portion 13 of the insulating film 1 includes a second opening 133 .

[0091] Therefore, after the second covering portion 13 covers at least a portion of the end surface 22 of the battery cell 2 , the injection hole 223 can be exposed from the second opening 133 , thereby effectively ensuring the performance of the injection hole 223 and the insulation performance of the end surface 22 of the battery cell 2 .

[0092] Of course, the injection hole 223 can also be set on the large surface 21 or the side surface 23 of the battery core 2. Those skilled in the art can make a choice according to actual needs, and this application does not make any specific restrictions here.

[0093] Optionally, the battery core 2 further includes an explosion-proof valve 224 ; the insulating film 1 further includes a third opening 134 , and the third opening 134 is configured to expose the explosion-proof valve 224 .

[0094] Specifically, Figures 1 to 5 As shown, the end surface 22 of the battery cell 2 in the embodiment of the present application is provided with an explosion-proof valve 224 , and the second covering portion 13 of the insulating film 1 includes a third opening 134 .

[0095] Therefore, after the second covering portion 13 covers at least a portion of the end surface 22 of the battery cell 2, the explosion-proof valve 224 can be exposed from the third opening 134, thereby effectively ensuring the performance of the explosion-proof valve 224 and the insulation performance of the end surface 22 of the battery cell 2.

[0096] Of course, the explosion-proof valve 224 can also be set on the large surface 21 or the side surface 23 of the battery core 2. Those skilled in the art can make a choice according to actual needs, and this application does not make any specific restrictions here.

[0097] According to another embodiment of the present application, a battery module is provided. The battery module includes the battery described in the embodiment of the present application.

[0098] According to another embodiment of the present application, a battery pack is provided, which includes a tray, an upper cover and the battery module described in the embodiment of the present application.

[0099] According to another embodiment of the present application, an electrical device is provided, which includes the insulating film described in the embodiment of the present application, or includes the battery described in the embodiment of the present application, or includes the battery module described in the embodiment of the present application, or includes the battery pack described in the embodiment of the present application.

[0100] The electrical equipment includes vehicles, smart phones, tablets, and laptop computers.

[0101] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0102] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An insulating film, characterized in that: include: A first covering portion (11), the first covering portion (11) being used to cover at least a portion of a large surface (21) of the battery core (2); A folded wing portion (12), the folded wing portion (12) being configured to fit onto at least a portion of the first covering portion (11) on a side away from the battery core (2), so as to form a first gap (3) between the large surfaces (21) of two adjacent battery cores (2).

2. The insulating film according to claim 1, wherein The folding wing portion (12) includes a first folding wing portion (121) and a second folding wing portion (122), wherein the first folding wing portion (121) is configured to be attached to one end of the first covering portion (11), and the second folding wing portion (122) is configured to be attached to the other end of the first covering portion (11) to form a second gap (4) between the first folding wing portion (121) and the second folding wing portion (122).

3. The insulating film according to claim 2, characterized in that The folding wing portion (12) also includes a third folding wing portion (123) and a fourth folding wing portion (124), wherein the third folding wing portion (123) is configured to be attached to a side of the first folding wing portion (121) away from the first covering portion (11), and the fourth folding wing portion (124) is configured to be attached to a side of the second folding wing portion (122) away from the first covering portion (11).

4. The insulating film according to claim 1, wherein The insulating film (1) further comprises a second covering portion (13) and a first fold (15); The second covering portion (13) is connected to the first covering portion (11) as a whole, and the second covering portion (13) is used to cover at least a portion of the end surface (22) of the battery core (2); The first fold (15) is arranged between the second covering portion (13) and the first covering portion (11).

5. The insulating film according to claim 4, characterized in that The insulating film (1) further comprises a third covering portion (14) and a second fold (16); The third covering portion (14) is connected to the second covering portion (13) as a whole, and the third covering portion (14) is used to cover at least part of the side surface (23) of the battery core (2); The second fold (16) is arranged between the third covering portion (14) and the second covering portion (13).

6. The insulating film according to claim 5, characterized in that The insulating film (1) further comprises a third fold (17) and an opening (18), wherein the third fold (17) is arranged between the third covering portion (14) and the folding wing portion (12), and the opening (18) is arranged between the first covering portion (11) and the folding wing portion (12).

7. A battery, characterized in that: include: A battery cell (2), wherein the battery cell (2) comprises a large surface (21); The insulating film (1) according to any one of claims 1 to 6, wherein the insulating film (1) is used to cover at least a portion of the large surface (21).

8. The battery according to claim 7, characterized in that The battery cell (2) further comprises an end face (22) and a side face (23), and the insulating film (1) covers at least a portion of the end face (22) and at least a portion of the side face (23).

9. The battery according to claim 8, characterized in that The battery further comprises a large surface film (5), wherein the large surface film (5) is used to cover at least a portion of the large surface (21) and at least a portion of the side surface (23).

10. The battery according to claim 7, characterized in that The battery cell (2) also includes a pole; The insulating film (1) further comprises a first opening (131), wherein the first opening (131) is configured to expose the pole.

11. The battery according to claim 7, characterized in that The battery core (2) further comprises a liquid injection hole (223); The insulating film (1) further comprises a second opening (133), wherein the second opening (133) is configured to expose the liquid injection hole (223).

12. The battery according to claim 7, characterized in that The battery cell (2) further includes an explosion-proof valve (224); The insulating film (1) further includes a third opening (134), wherein the third opening (134) is configured to expose the explosion-proof valve (224).

13. A battery module, characterized in that: Comprising a battery as claimed in any one of claims 7 to 12.

14. A battery pack, characterized in that: It comprises a tray, an upper cover and the battery module as claimed in claim 13.

15. An electrical equipment, characterized in that: It comprises the insulating film (1) as claimed in any one of claims 1 to 6, or comprises the battery as claimed in any one of claims 7 to 12, or comprises the battery module as claimed in claim 13, or comprises the battery pack as claimed in claim 14.

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