Heating film, battery pack and vehicle

Abstract

The utility model provides a heating film, a battery pack and a vehicle, and relates to the technical field of power batteries. The heating film comprises a heating film body and a wire electrically connected with the heating film body. The heating film body is provided with at least one extension part; the heating film body is configured to be arranged at the bottom of the battery cell module, and the extension part is located at the edge of the bottom of the battery cell module; the extension part extends outwards from the heating film body, and the extension direction of the extension part intersects with the extension direction of the heating film body, so that the contact areas of the heating film and different areas in the battery cell module are different, that is, the contact area of the heating film and the middle area of the battery cell module is smaller than the contact areas of the heating film and the areas on the two sides of the battery cell module; therefore, in the heating process, the heating efficiency of the heating film on the middle area of the battery cell module is smaller than the heating efficiency of the heating film on the two side areas of the battery cell module, so that the temperature difference between the middle area and the two side areas of the battery module is reduced, and the stability and the service life of the battery pack are ensured.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a heating film, a battery pack, and a vehicle. Background Technology

[0002] As the core power supply component of electric vehicles, the proper functioning of the battery pack is fundamental to the normal operation of the vehicle. One of the important conditions for the normal operation of the battery pack is that the internal temperature of the battery modules within the battery pack must be within a certain temperature range. Excessively high or low internal temperatures will affect the charging and discharging capabilities, reliability, and lifespan of the battery modules.

[0003] In existing technologies, a battery pack includes a frame and a cell module disposed within the frame. Multiple cells in the cell module are arranged sequentially within the frame, and a heating film is used to regulate the temperature of the cell module. During operation, the heat dissipation effect of the two side areas of the cell module is usually better than that of the middle area, resulting in a higher temperature in the middle area than in the side areas.

[0004] In existing technologies, when a rectangular heating film with uniform power density is used for heating, the temperature difference between the two sides and the middle area of ​​the battery cell module will become increasingly larger, which will shorten the service life of the battery pack. Utility Model Content

[0005] This application provides a heating film, a battery pack, and a vehicle to solve the problem that when the heating film of the prior art heats the battery cell module, the temperature difference between different areas of the battery cell module is large, which shortens the service life of the battery pack.

[0006] In a first aspect, this application provides a heating film, including a heating film body and a wire electrically connected to the heating film body;

[0007] The heating film body has at least one extension, and the extension direction of the extension intersects with the extension direction of the heating film body.

[0008] The heating film body is configured to be located at the bottom of the battery cell module, with the extension located at the bottom edge of the battery cell module.

[0009] In one possible implementation, the heating film provided in this application has an extension portion including a first extension portion and a second extension portion;

[0010] The first extension is located near one end of the heating film body, and the second extension is located near the other end of the heating film body.

[0011] In one possible implementation, the heating film provided in this application has a first extension portion whose length in the extending direction is greater than the second extension portion's length in the extending direction.

[0012] In one possible implementation, the heating film provided in this application also includes a wiring component;

[0013] The connector is located at one end of the heating film body, and the wires are electrically connected to the heating film body through the connector.

[0014] In one possible implementation, the heating film provided in this application has the wiring component located near the first extension.

[0015] In one possible implementation, the heating film provided in this application has a notch on at least one side of the heating film body.

[0016] In one possible implementation, the heating film provided in this application has notches on both opposite sides of the heating film body.

[0017] In one possible implementation, the heating film provided in this application has multiple heating film bodies, which are arranged at intervals and connected electrically by wires.

[0018] Secondly, this application provides a battery pack, including a frame, a cell module, and a heating film as described above;

[0019] Both the battery cell module and the heating film are housed within the frame, with the heating film positioned at the bottom of the battery cell module.

[0020] Thirdly, this application provides a vehicle, including a vehicle body and a battery pack as described above disposed within the vehicle body.

[0021] This invention provides a heating film, a battery pack, and a vehicle. The heating film includes a heating film body and a wire electrically connected to the heating film body. The heating film body has at least one extension. The heating film body is configured to be disposed at the bottom of a battery cell module, and the extension is located at the bottom edge of the battery cell module. The extension extends outward from the heating film body, and the extension direction of the extension intersects with the extension direction of the heating film body, so that the contact area between the heating film and different areas in the battery cell module is different. That is, the contact area between the heating film and the middle area of ​​the battery cell module is smaller than the contact area between the heating film and the two side areas of the battery cell module. Therefore, during the heating process, the heating efficiency of the heating film on the middle area of ​​the battery cell module is less than the heating efficiency on the two side areas of the battery cell module, thereby reducing the temperature difference between the middle area and the two side areas of the battery module and ensuring the stability and service life of the battery pack. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1This is a schematic diagram of the structure of a heating film provided in one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a heating film provided in another embodiment of this application;

[0025] Figure 3 This is a diagram showing the usage state of a heating film provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the arrangement of the heating film and the cell module in a battery pack according to an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of a heating film arranged at the bottom of a battery cell module according to an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100-Heating film;

[0030] 110 - Heating film body;

[0031] 111-Gap;

[0032] 120-Wire;

[0033] 121 - Error-proof label;

[0034] 130 - Extension;

[0035] 131 - First extension; 132 - Second extension;

[0036] 140-Connector;

[0037] 200-frame;

[0038] 210-Crossbeam; 220-Partition; 230-Cell cavity; 240-Electrical cavity;

[0039] 300-cell module;

[0040] 400-Liquid Cooling Plate.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0043] The terms “first,” “second,” “third,” and “fourth,” etc. (if present), in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0044] As mentioned in the background section, during operation, the heat dissipation of the outer and inner regions of a battery cell module is typically better than that of the middle region, resulting in a higher temperature in the middle region compared to the outer and inner regions. In existing technologies, using a rectangular heating film with uniform power density for heating further exacerbates the temperature difference between the outer and inner regions of the battery cell module, shortening the battery pack's lifespan.

[0045] To address the aforementioned problems in the prior art, this utility model provides a heating film, a battery pack, and a vehicle. The heating film includes a heating film body and a wire electrically connected to the heating film body. The heating film body has at least one extension. The heating film body is configured to be disposed at the bottom of a battery cell module, and the extension is located at the bottom edge of the battery cell module. The extension extends outward from the heating film body, and the extension direction of the extension intersects with the extension direction of the heating film body, so that the contact area between the heating film and different areas in the battery cell module is different. That is, the contact area between the heating film and the middle area of ​​the battery cell module is smaller than the contact area between the heating film and the two side areas of the battery cell module. Therefore, during the heating process, the heating efficiency of the heating film on the middle area of ​​the battery cell module is less than the heating efficiency on the two side areas of the battery cell module, thereby reducing the temperature difference between the middle and side areas of the battery module and ensuring the stability and service life of the battery pack.

[0046] The following describes exemplary application scenarios of this utility model.

[0047] The heating film provided by this invention can be applied to battery packs of new energy vehicles, such as battery packs for pure electric vehicles and battery packs for plug-in hybrid vehicles. Specifically, the heating film provided by this invention can be attached to the bottom of the cell module in the battery pack, with the extension extending outward from the heating film body, so that the contact area between the heating film and different areas in the cell module is different.

[0048] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0049] Reference Figure 1 and Figure 5 As shown, the present application provides a heating film 100, which includes a heating film body 110 and a wire 120 electrically connected to the heating film body 110.

[0050] The heating film body 110 has at least one extension 130, and the extension direction of the extension 130 intersects the extension direction of the heating film body 110.

[0051] The heating film body 110 is configured to be disposed at the bottom of the battery cell module 300, and the extension 130 is located at the bottom edge of the battery cell module 300.

[0052] In this embodiment, the heating film 100 is mainly used to heat the cell module 300 inside the battery pack. Inside the battery pack, the heating film body 110 is disposed at the bottom of the cell module 300, and the heating film body 110 is in contact with each cell in the cell module 300; the extension 130 is located at the bottom edge of the cell module 300, and the extension 130 is in contact with several cells located in the side regions of the cell module 300. The wire 120 is used for electrical connection with the electrical components in the battery pack.

[0053] The extension 130 extends outward from the heating film body 110, and the extension direction of the extension 130 intersects with the extension direction of the heating film body 110, so that the contact area between the heating film 100 and different areas in the cell module 300 is different. That is, the contact area between the heating film 100 and the middle area of ​​the cell module 300 is smaller than the contact area between the heating film 100 and the two side areas of the cell module 300. Thus, during the heating process, the heating efficiency of the heating film 100 on the middle area of ​​the cell module 300 is less than the heating efficiency on the two side areas of the cell module 300, thereby reducing the temperature difference between the middle area and the two side areas of the battery module and ensuring the stability and service life of the battery pack.

[0054] It is understood that the heating film body 110 can be a conventional existing technology, that is, including an insulating film and a heating wire disposed within the insulating film, which will not be elaborated further here. Of course, the extension 130 can also be the same as the heating film body 110, including an insulating film and a heating wire, wherein the heating wire of the heating film body 110 is electrically connected to the heating wire of the extension 130.

[0055] Of course, in a preferred embodiment, the insulating film of the heating film body 110 and the insulating film of the extension 130 are integrally formed. The heating wire is arranged in a circuitous manner between the insulating film of the heating film body 110 and the insulating film of the extension 130, and is electrically connected to the wire 120. Electrical energy is transmitted to the heating wire through the wire 120 to heat the heating film body 110 and the extension 130.

[0056] In the above-mentioned structural configuration, the one-piece molding can simplify the manufacturing process of the heating film 100 provided in this application, and it has high precision and production efficiency and low production cost.

[0057] In one embodiment, reference is made to... Figure 1 , Figure 2 and Figure 5 As shown, the extension 130 includes a first extension 131 and a second extension 132.

[0058] The first extension 131 is located near one end of the heating film body 110, and the second extension 132 is located near the other end of the heating film body 110.

[0059] In the above structural configuration, the first extension 131 and the second extension 132 correspond to the opposite side regions of the cell module 300, respectively. When the heating film body 110 is disposed at the bottom of the cell module 300, the first extension 131 and the second extension 132 can additionally increase the contact area with the opposite side regions of the cell module 300, so that when the cell module 300 is heated by the heating film 100 provided in this application, the temperature difference between the middle region and the side regions of the battery module is reduced.

[0060] To facilitate understanding of the directions, an XY plane coordinate system is established in the accompanying drawings of the relevant specification, wherein the direction of the X-axis is the first direction referred to in this application, and the direction of the Y-axis is the second direction referred to in this application.

[0061] Specifically, see, for example Figure 1 and Figure 2 As shown, the length of the heating film body 110 extends along the first direction, and the first extension 131 and the second extension 132 extend from the side of the heating film body 110 along the second direction, with the first direction perpendicular to the second direction.

[0062] Preferably, refer to, as Figure 1 and Figure 2 As shown, the first extension 131 and the second extension 132 can be located at the two ends of the heating film body 110 along the first direction, so that the heating film 100 provided in this application is in the shape of an "I".

[0063] In a preferred embodiment, refer to as follows Figure 1 Figure 2 ,and Figure 5 As shown, multiple battery cells of the battery cell module 300 are arranged sequentially along the first direction. The heating film body 110 contacts the bottom of the multiple battery cells sequentially along the first direction. The first extension 131 and the second extension 132 respectively contact the bottom of several battery cells located on both sides along the first direction.

[0064] By setting the above structure, the first extension 131 and the second extension 132 additionally increase the contact area between the heating film 100 and the opposite side regions of the battery cell module 300 along the first direction, so that the heating efficiency of several battery cells located in the side regions of the battery cell module 300 is greater than the heating efficiency of several battery cells located in the middle region of the battery cell module 300, thereby reducing the temperature difference between them.

[0065] Furthermore, the heating film body 110 has a strip-shaped integrated structure. The heating film body 110 is arranged along the arrangement direction of multiple battery cells in the battery cell module 300, which can reduce the manufacturing cost of the heating film 100, make the heating film 100 cover multiple battery cells more densely, and improve heating efficiency.

[0066] In one specific embodiment, reference is made to, as shown in, Figure 1 , Figure 2 and Figure 3 As shown, the length of the first extension 131 in the extending direction is greater than the length of the second extension 132 in the extending direction.

[0067] It is understood that the extension direction of the first extension 131 and the extension direction of the second extension 132 are the second directions mentioned above.

[0068] In a battery pack, a liquid cooling plate 400 is typically used to cool the cell module 300. In actual use, the liquid cooling plate 400 and the heating film 100 can be used individually or simultaneously to regulate the temperature of the cell module 300.

[0069] Multiple battery cells in the battery cell module 300 are arranged along the flow channels in the liquid cooling plate 400. Since the coolant absorbs the heat generated by the battery cells when it flows in the flow channels, the cooling effect of the liquid cooling plate 400 on several battery cells close to the coolant inlet is better than that on several battery cells far away from the coolant inlet.

[0070] Therefore, in this embodiment, referring to as follows Figure 3As shown, the length of the first extension 131 in the extending direction is greater than the length of the second extension 132 in the extending direction. When the heating film 100 is arranged in the battery pack, the first extension 131 can be arranged near the coolant inlet of the liquid cooling plate 400 to reduce the temperature difference between the area of ​​the battery module near the coolant inlet and the area away from the coolant inlet.

[0071] In one specific embodiment, reference is made to, as shown in, Figure 1 and Figure 2 As shown, the heating film 100 also includes a wiring component 140.

[0072] The connector 140 is located at one end of the heating film body 110, and the wire 120 is electrically connected to the heating film body 110 through the connector 140.

[0073] In the above structural configuration, the connector 140 is mainly used for the electrical connection between the wire 120 and the heating film body 110, and the connector 140 has positive and negative terminals.

[0074] Specifically, see, for example Figure 2 As shown, when there are a large number of battery cells in the battery cell module 300 and multiple heating film bodies 110 need to be set, the wiring terminals 140 on each heating film body 110 can be connected in series by wires 120 to form a circuit.

[0075] For example, connector 140 can be a connector head.

[0076] Of course, if the wire 120 needs maintenance or replacement, it can be simply removed from the connector 140 without replacing the heating film body 110, thus saving costs.

[0077] In one specific embodiment, reference is made to, as shown in, Figures 1 to 4 As shown, connector 140 is located near the first extension 131.

[0078] In the above embodiment, the first extension 131 can be arranged near the coolant inlet of the liquid cooling plate 400. At this time, the connector 140 is arranged at the end of the heating film body 110 with the first extension 131. The connector 140 can be close to the electrical components in the battery pack to reduce the length of the wire 120 and facilitate the electrical connection between the wire 120 and the electrical components.

[0079] Specifically, refer to, for example Figure 3 and Figure 4As shown, in the battery pack, both electrical components (not shown) and cell modules 300 can be mounted on a liquid cooling plate 400 for cooling. To facilitate installation of the battery pack within the vehicle body, the wiring terminals in the electrical components and the coolant inlet / outlet of the liquid cooling plate 400 can be located on the same side of the battery pack. After entering through the coolant inlet on the liquid cooling plate 400, the coolant first flows through the bottom of the electrical components and then through the bottom of the cell modules 300.

[0080] Therefore, when the connector 140 is arranged at one end of the heating film body 110 with the first extension 131, and the heating film 100 is installed at the bottom of the cell module 300, the first extension 131 is arranged near the coolant inlet of the liquid cooling plate 400, so that the connector 140 can be close to the electrical components in the battery pack, thereby reducing the length of the wire 120 and facilitating the electrical connection between the wire 120 and the electrical components.

[0081] Of course, preferably, refer to, as Figure 3 and Figure 4 As shown, the connector 140 is disposed at one end of the heating film body 110 along the first direction, and the connector 140 is close to the first extension 131 to facilitate the electrical connection between the wire 120 and the electrical components.

[0082] In one embodiment, reference is made to, as shown in... Figure 1 and Figure 2 As shown, a notch 111 is provided on at least one side of the heating film body 110.

[0083] In the above structure, the notch 111 on the heating film body 110 is mainly used to avoid the crossbeam 210 in the frame 200 of the battery pack.

[0084] Specifically, refer to, for example Figure 3 and Figure 4 As shown, in the battery pack, multiple battery cells of the cell module 300 are arranged sequentially along a first direction within the frame 200. At least one crossbeam 210 may be provided within the frame 200, dividing the internal space of the frame 200 into multiple cell cavities 230, each of which may contain several battery cells arranged sequentially along the first direction.

[0085] The heating film body 110 can pass through the clearance groove at the bottom of each crossbeam 210 in sequence along the first direction and be arranged at the bottom of each cell of the cell module 300. The notch 111 on the heating film body 110 is located in the clearance groove at the bottom of the crossbeam 210 to prevent the heating film body 110 from contacting the crossbeam 210.

[0086] Furthermore, the notch 111 can also serve a positioning function, facilitating the installation of the heating film body 110 within the frame 200.

[0087] In a preferred embodiment, refer to as follows Figure 1 and Figure 2 As shown, notches 111 are provided on both opposite sides of the heating film body 110.

[0088] In the above structure, it is possible to avoid both sides of the heating film body 110 from contacting the crossbeam 210.

[0089] In one embodiment, reference is made to, as shown in... Figures 2 to 5 As shown, there are multiple heating film bodies 110, which are arranged at intervals, and wires 120 electrically connect each heating film body 110.

[0090] In the above structural configuration, there are multiple heating film bodies 110 to accommodate battery cell modules 300 with a large number of battery cells. These multiple heating film bodies 110 can be arranged at intervals along the second direction.

[0091] The extensions 130 of each heating film body 110 have different shapes to prevent misalignment and ensure that the heating film bodies 110 are arranged sequentially. This design saves on wires 120, as the wires 120 connected to each heating film body 110 can be of varying lengths, with different shaped extensions 130 corresponding to different lengths of wires 120. When arranging the heating film 100 within the battery pack, the appropriate length of wire 120 can be easily and quickly selected based on the position of each heating film body 110, avoiding waste due to excessively long wires or inconvenient wiring due to excessively short wires 120.

[0092] For example, the number of heating film bodies 110 can be 2, 3, 4, etc., and there is no limitation here. It can be adaptively adjusted according to the number of battery cells in the battery cell module 300.

[0093] For reference Figures 2 to 5 As shown, the following description uses a heating film 100 with four heating film bodies 110 as an example.

[0094] Four heating film bodies 110 are arranged at intervals along a second direction. The length of the first extension 131 on the two heating film bodies 110 located on both sides in the first direction is greater than the length of the first extension 131 on the two heating film bodies 110 located in the middle in the first direction. The same applies to the second extension 132 on each heating film body 110. In addition to allowing the heating film bodies 110 to be arranged sequentially, this design also increases the contact area between the heating film 100 and the edge region of the battery cell module 300, thereby reducing the temperature difference.

[0095] The first extensions 131 of the four heating film bodies 110 have different shapes to correspond to wires 120 of different lengths.

[0096] For reference Figure 3 As shown, when the heating film 100 is arranged in the frame 200 of the battery pack, the heating film body 110 with corresponding wires 120 can be quickly selected according to the shape of the first extension 131 based on factors such as the position of each heating film body 110 in the frame 200 and the position of the electrical components, so as to facilitate the reasonable layout and routing of the wires 120 connected to each heating film body 110 in the frame 200.

[0097] The shape of the first extension 131 of each heating film 100 can be rectangular, trapezoidal, circular, semi-circular, triangular, etc., and there is no limitation here.

[0098] Accordingly, the shape of the second extension 132 of each heating film 100 can be rectangular, trapezoidal, circular, semi-circular, triangular, etc., and there is no limitation here.

[0099] In one embodiment, reference is made to, as shown in... Figure 1 As shown, each heating film body 110 is equipped with a mis-proof label 121 on the wire 120 connected to it, so as to clearly identify the correct connection position of each wire 120 and avoid misconnection or incorrect connection.

[0100] like Figure 3 and Figure 4 As shown, the present application provides a battery pack including a frame 200, a cell module 300 and a heating film 100 as described above.

[0101] Both the battery cell module 300 and the heating film 100 are disposed within the frame 200, with the heating film 100 located at the bottom of the battery cell module 300.

[0102] In the above technical solution, since the battery pack uses the heating film 100 in the above embodiment, it also has the advantages and benefits brought by the heating film 100. That is, when the heating film 100 is used to heat the cell module 300, the temperature difference between the middle area and the two side areas of the battery module can be reduced, ensuring the stability and service life of the battery pack.

[0103] In one embodiment, such as Figure 3 and Figure 4 As shown, the battery pack also includes electrical components. A partition 220 divides the internal space of the frame 200 into a cell cavity 230 and an electrical cavity 240. The cell module 300 is disposed within the cell cavity 230, and the electrical components are disposed within the electrical cavity 240. The wires 120 of the heating film 100 can pass through the partition 220 and are arranged along the inner wall of the electrical cavity 240 to facilitate the installation of the heating film 100.

[0104] This application provides a vehicle, including a vehicle body and a battery pack as described above disposed within the vehicle body.

[0105] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0106] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A heating film, characterized in that, It includes a heating film body (110) and a wire (120) electrically connected to the heating film body (110); The heating film body (110) has at least one extension (130), and the extension direction of the extension (130) intersects with the extension direction of the heating film body (110). The heating film body (110) is configured to be disposed at the bottom of the battery cell module, and the extension (130) is located at the bottom edge of the battery cell module.

2. The heating film according to claim 1, characterized in that, The extension (130) includes a first extension (131) and a second extension (132); The first extension (131) is located near one end of the heating film body (110), and the second extension (132) is located near the other end of the heating film body (110).

3. The heating film according to claim 2, characterized in that, The length of the first extension (131) in the extending direction is greater than the length of the second extension (132) in the extending direction.

4. The heating film according to claim 3, characterized in that, It also includes a connector (140); The connector (140) is disposed at one end of the heating film body (110), and the wire (120) is electrically connected to the heating film body (110) through the connector (140).

5. The heating film according to claim 4, characterized in that, The connector (140) is located near the first extension (131).

6. The heating film according to claim 1, characterized in that, At least one side of the heating film body (110) is provided with a notch (111).

7. The heating film according to claim 6, characterized in that, The heating film body (110) has notches (111) on both sides.

8. The heating film according to any one of claims 1 to 7, characterized in that, The number of heating film bodies (110) is multiple, and the multiple heating film bodies (110) are arranged at intervals. The wires (120) electrically connect each heating film body (110).

9. A battery pack, characterized in that, It includes a frame (200), a battery cell module (300), and a heating film (100) as described in any one of claims 1 to 8; The battery cell module (300) and the heating film (100) are both disposed within the frame (200), with the heating film (100) arranged at the bottom of the battery cell module (300).

10. A vehicle, characterized in that, It includes the vehicle body and the battery pack as described in claim 9 disposed within the vehicle body.

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