Heating film structure, battery structure, battery pack and electric equipment

Abstract

The utility model provides a heating film structure, a battery structure, a battery pack and electric equipment, the heating film structure comprises a first insulating film and a second insulating film, and the first insulating film and the second insulating film are stacked; a heating layer sandwiched between the first insulating film and the second insulating film; the heating film structure is used for being arranged on at least one large surface of the battery cell, the resistance value of the heating layer is increased under the condition that the heating layer is electrified, and the heating layer can emit heat to heat the battery cell, so that the heating effect on the battery cell is ensured; and the heating film structure can play a role in insulation protection, so that the safety of the heating process is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, and specifically relates to a heating film structure, a battery structure, a battery pack and electrical equipment. Background Art

[0002] When heating the battery cell, the existing battery pack places metal wire on the surface of the battery cell. The metal wire not only consumes a lot of energy during use, but also has the risk of dry burning, which may not only damage the metal wire itself, but also cause safety hazards to the entire battery pack. Utility Model Content

[0003] One purpose of the utility model is to provide a new technical solution for a heating film structure, a battery structure, a battery pack and an electrical device.

[0004] According to a first aspect of the utility model, a heating film structure is provided, comprising:

[0005] a first insulating film and a second insulating film, wherein the first insulating film and the second insulating film are stacked;

[0006] a heating layer, the heating layer being sandwiched between the first insulating film and the second insulating film;

[0007] The heating film structure is used to be arranged on at least one large surface of the battery core. When the heating layer is powered on, the resistance value increases and it can generate heat to heat the battery core.

[0008] Optionally, the heating layer includes a plurality of heating bars, and the plurality of heating bars are arranged at intervals between the first insulating film and the second insulating film.

[0009] Optionally, a plurality of the heating strips are arranged in parallel, and the heating strips can extend along the length direction of the battery core.

[0010] Optionally, the thickness of the first insulating film is in the range of 20 μm-50 μm; and / or,

[0011] The thickness of the second insulating film is in the range of 15 μm to 40 μm; and / or,

[0012] The thickness of the heating layer is in the range of 15 μm to 40 μm.

[0013] Optionally, the thickness of the first insulating film is greater than the thickness of the second insulating film, and the first insulating film is used to connect to a large surface of the battery cell.

[0014] Optionally, the heating film structure comprises a bonding area and a bending area, and the bending area is vertically connected to the edge of the bonding area;

[0015] The laminating area is used to be arranged on the large surface of the battery cell, and the bending area is used to be arranged on the side surface of the battery cell.

[0016] Optionally, the heating layer is sandwiched between a first insulating film in the bonding area and a second insulating film in the bonding area.

[0017] Optionally, an electrical connector is also included, and the electrical connector is used to connect the heating layer to an external power source.

[0018] According to a second aspect of the utility model, a battery structure is provided, comprising a battery cell and the heating film structure described in the first aspect;

[0019] The heating film structure is arranged on at least one large surface of the battery core.

[0020] Optionally, an isolation film is also included, the heating film structure is arranged on one large surface of the battery cell, and the isolation film is arranged on the other large surface of the battery cell.

[0021] According to a third aspect of the present invention, a battery pack is provided, comprising the battery structure described in the second aspect, or comprising the heating film structure described in the first aspect.

[0022] Optionally, a plurality of battery cells are included, and the plurality of battery cells are arranged side by side, a large surface on one side of each battery cell is provided with a heating film structure, and a large surface on the other side of each battery cell is provided with an isolation film, so that the heating film structure is provided between adjacent battery cells.

[0023] According to a fourth aspect of the present utility model, there is provided an electrical device, comprising the battery pack according to the third aspect;

[0024] Alternatively, comprising the battery structure described in the second aspect;

[0025] Alternatively, it comprises the heating film structure described in the first aspect.

[0026] A technical effect of the utility model is:

[0027] An embodiment of the present application provides a heating film structure, which includes a first insulating film and a second insulating film, which are stacked; a heating layer, which is sandwiched between the first insulating film and the second insulating film; the heating film structure is used to be arranged on at least one large surface of a battery cell, and the heating layer increases in resistance and can generate heat when power is turned on, so as to heat the battery cell, thereby ensuring the heating effect on the battery cell; and the heating film structure can both play a role in insulation protection and ensure the safety of the heating process.

[0028] 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

[0029] 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.

[0030] Figure 1 A schematic diagram of a heating film structure provided by an embodiment of the utility model;

[0031] Figure 2 A schematic structural diagram of a heating film structure provided by an embodiment of the utility model;

[0032] Figure 3 A schematic diagram of a battery structure provided by an embodiment of the utility model;

[0033] Figure 4 A partial schematic diagram of a battery structure provided for one embodiment of the utility model.

[0034] Wherein: 100, heating film structure; 1, first insulating film; 2, second insulating film; 3, heating layer; 31, heating strip; 4, electrical connector; 5, adhesive; 6, laminating area; 7, bending area;

[0035] 200. Battery cell; 300. Isolation film. DETAILED DESCRIPTION

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The heating film structure provided in the embodiment of the present application heats the large surface of the battery cell through the heating layer, which can prevent the temperature of the battery cell from being too low and ensure the temperature suitability of the battery cell; and the heating layer is coated with a double-layer insulating film, so that the heating film structure has insulating properties, thereby ensuring the insulation effect of the battery cell and safety during heating.

[0043] The large surface of the battery cell may be the surface with the largest area among all the surfaces of the battery cell. For example, when the battery cell is a rectangular parallelepiped, the length dimension of the battery cell is greater than the height dimension of the battery cell, and the height dimension of the battery cell is greater than the width dimension of the battery cell. Then the surface surrounded by the long sides and high sides of the battery cell is the large surface, and the surface surrounded by the long sides and wide sides of the battery cell is the side surface.

[0044] Reference Figure 1 and Figure 2 , an embodiment of the present application provides a heating film structure, the heating film structure comprising:

[0045] A first insulating film 1 and a second insulating film 2, wherein the first insulating film 1 and the second insulating film 2 are stacked;

[0046] A heating layer 3, wherein the heating layer 3 is sandwiched between the first insulating film 1 and the second insulating film 2;

[0047] The heating film structure is used to be arranged on at least one large surface of the battery cell. The resistance of the heating layer 3 increases when power is supplied, and the heating layer 3 can generate heat. For example, the heating layer 3 includes a thermistor. The resistance of the thermistor increases and generates heat when power is supplied, so as to heat the battery cell.

[0048] In one embodiment, the heating layer 3 includes a carbon base and a thermosensitive portion. When the carbon base is powered on, the thermosensitive portion can generate heat to heat the battery cell.

[0049] In this embodiment, the carbon base can be a conductive part in the heating layer 3 to facilitate energizing the heating layer 3, and the thermistor can be a PTC (Positive Temperature Coefficient) thermistor to form a heating part in the heating layer 3. The carbon base and the thermistor are mixed together to form a conductive polymer layer with a composite structure.

[0050] Since the thermistor has the characteristic that the resistivity increases with increasing temperature, when the heating layer 3 is energized through the carbon base, the temperature of the thermistor will increase, and as the temperature increases, the resistance value of the thermistor increases, so that the battery cell can be heated through the thermistor.

[0051] The temperature rise of the thermosensitive part will reach a high temperature threshold. Compared with the metal wire heating film, which may have problems of over-high temperature and uneven heating during heating, the thermosensitive part can effectively avoid the problems of over-high temperature and uneven heating of the heating layer 3.

[0052] In one embodiment, the heating layer 3 can be first coated on one side surface of the first insulating film 1 close to the second insulating film 2, and then the second insulating film 2 can be adhered to the one side surface of the first insulating film 1 to set the heating layer 3, so that the heating layer 3 can be clamped by the first insulating film 1 and the second insulating film 2, providing the heating film structure with good insulation performance.

[0053] In one embodiment, the first insulating film 1 and the second insulating film 2 may both be PI (Polyimide film) films. The PI films are resistant to high temperatures and have good insulating properties, and can ensure the integrity and safety of the heating film structure during the heating process.

[0054] In this embodiment, the heating film structure is attached to the large surface of the battery cell, replacing at least part of the isolation film on the original battery cell surface. The heating film structure can not only play the role of insulation protection, but also heat the battery cell, ensuring the heating effect of the battery cell; and the heating film structure has low energy consumption, ensuring the safety of the heating process.

[0055] In one embodiment, an isolation film is set on a large surface of one side of the battery cell, and a heating film structure is set on a large surface of the other side of the battery cell. The side of the battery cell can be covered by the isolation film or the heating film structure to protect the surrounding side of the battery cell through the combination of the isolation film and the heating film structure.

[0056] In one embodiment, a heating film structure is provided on both large surfaces and side surfaces of the battery cell, for example, two C-shaped heating film structures are used to cover the two large surfaces and upper and lower side surfaces of the battery cell, or a ring-shaped heating film structure is sleeved onto the battery cell to cover the two large surfaces and upper and lower side surfaces of the battery cell, so as to protect the surrounding sides of the battery cell through the heating film structure.

[0057] In one embodiment, see Figure 2 After the heating layer 3 is sandwiched between the first insulating film 1 and the second insulating film 2, they can be bonded to the large surface of the battery cell through an adhesive 5. The adhesive can be a double-sided adhesive or a curing adhesive to ensure the stability of the heating film structure set on the battery cell.

[0058] The heating film structure provided in the embodiment of the present application includes a first insulating film 1 and a second insulating film 2, which are stacked; a heating layer 3, which is sandwiched between the first insulating film 1 and the second insulating film 2; the heating film structure is used to be arranged on at least one large surface of the battery cell, and the heating layer 3 can generate heat when power is turned on to heat the battery cell, thereby ensuring the heating effect on the battery cell; and the heating film structure can not only play the role of insulation protection, but also ensure the safety of the heating process.

[0059] In one embodiment, see Figure 1 The heating layer 3 includes a plurality of heating bars 31 , and the plurality of heating bars 31 are arranged at intervals between the first insulating film 1 and the second insulating film 2 .

[0060] In this embodiment, a plurality of heating strips 31 are arranged at intervals, which can ensure the heating efficiency of the heating film structure while ensuring the heating balance of the heating film structure and avoiding local overheating of the heating film structure.

[0061] Specifically, the width and spacing distance of the heating strips 31 can be set according to the heating power obtained by simulation calculation of the thermal management system. For example, if the area of ​​the heating layer 3 required to achieve the above heating power is S, then multiple heating strips 31 can be set, and the total area of ​​the multiple heating strips 31 is S to ensure that the heating film structure heats the battery cell, so that the temperatures of different areas on the battery cell tend to be consistent, making the heating of the battery cell by the heating film structure more uniform.

[0062] In one embodiment, a plurality of heating strips 31 are arranged at equal intervals between the first insulating film 1 and the second insulating film 2, and the thickness and width of the plurality of heating strips 31 are the same, so as to ensure the heating balance of the heating film structure.

[0063] In one embodiment, see Figure 1 , multiple heating strips 31 are arranged in parallel, and the heating strips 31 can extend along the length direction of the battery cell.

[0064] In this embodiment, the structures of the multiple heating strips 31 are the same. When the multiple heating strips 31 are connected in parallel, the end voltages of the multiple heating strips 31 can be ensured to be equal, so that the heating amounts of the multiple heating strips 31 are equal, thereby ensuring the heating consistency of the heating film structure.

[0065] In one embodiment, see Figure 2 ,exist Figure 2 In the vertical direction, the thickness of the first insulating film 1 ranges from 20μm to 50μm. For example, when the heating film structure is provided on at least one large surface of the battery cell, the first insulating film 1 can fit with the battery cell to ensure that the heating layer 3 heats the battery cell while avoiding direct contact between the heating layer 3 and the battery cell to cause a short circuit.

[0066] In one embodiment, see Figure 2 ,exist Figure 2 In the vertical direction, the thickness of the second insulating film 2 ranges from 15 μm to 40 μm, so that the heating layer 3 is sandwiched by the first insulating film 1 and the second insulating film 2 to provide the heating film structure with good insulation performance.

[0067] In one embodiment, see Figure 2 ,exist Figure 2 In the vertical direction, the thickness of the heating layer 3 ranges from 15 μm to 40 μm. When the thickness of the heating layer 3 increases, the heating power of the heating film structure can be increased, and the heating effect of the heating film structure on the battery cell can be improved.

[0068] In a specific embodiment, the first insulating film 1 is a PI film, and the thickness of the first insulating film 1 is 30 μm, the second insulating film 2 is a PI film, and the thickness of the second insulating film 2 is 25 μm, the thickness of the heating layer 3 is 20 μm, and it is bonded to the large surface of the battery cell with a 25 μm double-sided tape.

[0069] In one embodiment, the thickness of the first insulating film 1 is greater than the thickness of the second insulating film 2 , and the first insulating film 1 is used to connect to the large surface of the battery cell.

[0070] In this embodiment, when the heating film structure is connected to the battery cell and heats the battery cell, the first insulating film 1 is located on the side of the heating layer 3 close to the battery cell, and the second insulating film 2 is located on the side of the heating layer 3 away from the battery cell; when the heating layer 3 heats the battery cell, the heat needs to pass through the first insulating film 1 to be transferred to the battery cell. In order to avoid damage to the structure of the first insulating film 1 due to the high-temperature area of ​​the battery cell, causing the heating layer 3 to directly contact the battery cell and short-circuit, the thickness of the first insulating film 1 can be set to be larger than the thickness of the second insulating film 2 to ensure the structural integrity of the first insulating film 1.

[0071] In one embodiment, the heating film structure includes a bonding area 6 and a bending area 7, and the bending area 7 is vertically connected to the edge of the bonding area 6;

[0072] The laminating area 6 is used to be arranged on the large surface of the battery cell, and the bending area 7 is used to be arranged on the side surface of the battery cell, so as to improve the protective performance of the heating film structure on the battery cell.

[0073] In one embodiment, see Figure 1 The heating film structure includes a bonding area 6 and two bending areas 7, and the two bending areas 7 are vertically connected to the two sides of the bonding area 6;

[0074] The laminating area 6 is used to be arranged on the large surface of the battery cell, and the bending area 7 is used to be arranged on the side surface of the battery cell.

[0075] In this embodiment, when the heating layer 3 is sandwiched between the first insulating film 1 and the second insulating film 2 to form a stacked heating film structure, the stacked heating film structure can be bent into a C shape, specifically, two bending areas 7 are vertically connected to both sides of the bonding area 6 to form a C shape.

[0076] In one embodiment, a C-shaped heating film structure can be set on one large surface and part of the side surface of the battery cell, and the other large surface and the remaining side surface of the battery cell are protected by a C-shaped isolation film; when multiple battery cells are arranged side by side, the C-shaped heating film structure can be used to heat two adjacent battery cells at the same time.

[0077] In another embodiment, a C-shaped heating film structure is arranged on one large surface and part of the side surface of the battery cell, and another C-shaped heating film structure is arranged on the other large surface and the remaining side surface of the battery cell, both of which can achieve complete protection for the surrounding side of the battery cell (which can be the sum of the large surface and the side surface).

[0078] In one embodiment, see Figure 1 The heating layer 3 is sandwiched between the first insulating film 1 in the bonding area and the second insulating film 2 in the bonding area.

[0079] In this embodiment, for the large surface of the battery cell, since the large surface of the battery cell is large, uniform heat distribution on the large surface of the battery cell is more conducive to achieving uniform heating of the entire battery cell. Therefore, the heating layer 3 is sandwiched between the first insulating film 1 in the bonding area and the second insulating film 2 in the bonding area, so that the heating layer 3 can heat the large surface of the battery cell in time, ensuring the heating efficiency of the heating film structure on the battery cell and the uniformity of the temperature in the battery cell.

[0080] In one embodiment, see Figure 2 The heating film structure further comprises an electrical connector 4, which is used to connect the heating layer 3 to an external power source so as to be able to energize the heating layer 3.

[0081] In this embodiment, see Figure 2 The electrical connector 4 can be an aluminum sheet or a copper sheet. The function of the electrical connector 4 is to conduct the circuit of the carbon base of the heating layer 3 so as to form a complete electrical circuit in the heating layer 3 to ensure the heating stability of the heating layer 3.

[0082] See also Figure 3 and Figure 4 , an embodiment of the present application provides a battery structure, the battery structure comprising a battery cell 200 and a heating film structure 100;

[0083] The heating film structure 100 is disposed on at least one large surface of the battery cell 200 .

[0084] In this embodiment, a heating film structure 100 can be set for one battery cell, and a C-shaped heating film structure 100 can be set on one large surface and part of the side surface of the battery cell 200, and the other large surface and the remaining side surface of the battery cell 200 are protected by a C-shaped isolation film 300; when multiple battery cells 200 are arranged side by side, two adjacent battery cells 200 can be heated simultaneously by the C-shaped heating film structure.

[0085] Two heating film structures 100 may also be provided, with one C-shaped heating film structure 100 provided on one large surface and part of the side surface of the battery cell 200, and the other C-shaped heating film structure 100 provided on the other large surface and the remaining side surface of the battery cell 200, both of which can achieve complete protection of the surrounding side of the battery cell 200.

[0086] In one embodiment, see Figure 4 The battery structure further includes an isolation film 300 , the heating film structure 100 is disposed on one large surface of the battery cell 200 , and the isolation film 300 is disposed on the other large surface of the battery cell 200 .

[0087] In this embodiment, the isolation film 300 can be a PET (polyethylene terephthalate) film. One side of the battery cell 200 is covered with the heating film structure 100, and the other side is covered with the isolation film 300. The heating film structure 100 and the isolation film 300 cooperate to form complete protection for the surrounding side of the battery cell 200.

[0088] In one embodiment, two end surfaces of the battery cell 200 may also be covered with the heating film structure 100 to improve the temperature balance of the battery cell 200 .

[0089] An embodiment of the present application further provides a battery pack, which includes the above-mentioned battery structure, or includes the above-mentioned heating film structure 100.

[0090] In this embodiment, the heating film structure 100 is used to be arranged on at least one large surface of the battery cell 200. When power is turned on, the heating layer 3 of the heating film structure 100 increases in resistance and can generate heat to heat the battery cell 200, thereby ensuring the heating effect of the battery cell 200; and the heating film structure 100 can play a role in insulation protection and ensure the safety of the heating process.

[0091] In one embodiment, the battery pack includes a plurality of battery cells 200, and the plurality of battery cells 200 are arranged side by side. A heating film structure 100 is provided on a large surface of one side of each battery cell 200, and an isolation film 300 is provided on a large surface of the other side of each battery cell 200, so that a heating film structure 100 is provided between adjacent battery cells 200.

[0092] In this embodiment, among the multiple battery cells 200, the large surfaces on both sides of each battery cell 200 can be an isolation film surface and a heating film surface respectively. The multiple battery cells 200 are stacked in a battery tray, and the isolation film surfaces and heating film surfaces of adjacent battery cells 200 are opposite to each other. An isolation film 300 is arranged on the isolation film surface of the battery cell 200, and a heating film structure 100 is arranged on the heating film surface of the battery cell 200, so that the heating film structure 100 can be sandwiched between adjacent battery cells 200. The heating film structure 100 can heat the two large surfaces of adjacent battery cells at the same time, so that the temperature of each battery cell tends to be consistent, thereby improving the temperature consistency of multiple battery cells.

[0093] The embodiment of the present application further provides an electric device, which includes the above-mentioned battery pack;

[0094] Or, comprising the above-mentioned battery structure;

[0095] Alternatively, it includes the heating film structure 100 described above.

[0096] In this embodiment, the electrical equipment may be a vehicle, an electrical lighting device, a refrigeration device, an air conditioning system electrical equipment, or a fire fighting device.

[0097] 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. A heating film structure, characterized in that: include: A first insulating film (1) and a second insulating film (2), wherein the first insulating film (1) and the second insulating film (2) are stacked; A heating layer (3), the heating layer (3) being sandwiched between the first insulating film (1) and the second insulating film (2); The heating film structure is used to be arranged on at least one large surface of a battery core, and the heating layer (3) increases its resistance and can generate heat when powered, so as to heat the battery core.

2. The heating film structure according to claim 1, characterized in that: The heating layer (3) comprises a plurality of heating bars (31), and the plurality of heating bars (31) are arranged at intervals between the first insulating film (1) and the second insulating film (2).

3. The heating film structure according to claim 2, characterized in that: A plurality of the heating strips (31) are arranged in parallel, and the heating strips (31) can extend along the length direction of the battery core.

4. The heating film structure according to claim 1, characterized in that: The thickness of the first insulating film (1) is in the range of 20 μm to 50 μm; and / or, The thickness of the second insulating film (2) is in the range of 15 μm to 40 μm; and / or, The thickness of the heating layer (3) is in the range of 15 μm to 40 μm.

5. The heating film structure according to claim 1 or 4, characterized in that: The thickness of the first insulating film (1) is greater than the thickness of the second insulating film (2), and the first insulating film (1) is used to connect to the large surface of the battery cell.

6. The heating film structure according to claim 1, characterized in that: The heating film structure comprises a bonding area (6) and a bending area (7), wherein the bending area (7) is vertically connected to the edge of the bonding area (6); The laminating area (6) is used to be arranged on the large surface of the battery core, and the bending area (7) is used to be arranged on the side surface of the battery core.

7. The heating film structure according to claim 6, characterized in that: The heating layer (3) is sandwiched between the first insulating film (1) of the bonding area and the second insulating film (2) of the bonding area.

8. The heating film structure according to claim 1, characterized in that: It also comprises an electrical connector (4), wherein the electrical connector (4) is used to connect the heating layer (3) to an external power source.

9. A battery structure, characterized in that: Comprising a battery core (200) and a heating film structure (100) according to any one of claims 1 to 8; The heating film structure (100) is arranged on at least one large surface of the battery core (200).

10. The battery structure according to claim 9, characterized in that: It also includes an isolation film (300), the heating film structure (100) is arranged on one large surface of the battery cell (200), and the isolation film (300) is arranged on the other large surface of the battery cell (200).

11. A battery pack, characterized in that: It comprises the battery structure according to claim 9 or 10, or it comprises the heating film structure (100) according to any one of claims 1 to 8.

12. The battery pack according to claim 11, characterized in that: The invention comprises a plurality of battery cells (200), wherein the plurality of battery cells (200) are arranged side by side, a large surface on one side of each battery cell (200) is provided with a heating film structure (100), and a large surface on the other side of each battery cell (200) is provided with an isolation film (300), so that the heating film structure (100) is provided between adjacent battery cells (200).

13. An electrical equipment, characterized in that: A battery pack comprising the battery pack according to claim 11 or 12; Or, comprising the battery structure of claim 9 or 10; Or, it comprises the heating film structure (100) according to any one of claims 1 to 8.

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