Battery heating film, battery module and automobile

Abstract

The utility model provides a battery heating film, a battery module and an automobile, and relates to the technical field of automobile accessories. The battery heating film comprises a plurality of film bodies, a plurality of connecting pieces and communicating pieces, the film bodies are used for simultaneously heating a plurality of battery cells on the same straight line of a battery module, the connecting pieces are arranged between the adjacent film bodies, the connecting pieces are used for electrically connecting the adjacent film bodies, the plurality of film bodies are connected end to end through the plurality of connecting pieces, the communicating pieces are arranged on the film bodies, and the connecting pieces are used for electrically connecting the adjacent film bodies. And the communicating pieces are used for electrically connecting the plurality of film bodies with a power management system. According to the battery heating film, the battery module and the automobile, the mounting efficiency of the battery heating film is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile accessories, and in particular to a battery heating film, a battery module and an automobile. BACKGROUND

[0002] The battery module of an automobile is a component for storing electric energy in an electric automobile. It is composed of multiple battery units, each of which includes multiple electrically connected battery cells. The battery heating film of an automobile is a heating technology for the battery system of an electric automobile, and the main purpose is to increase the temperature of the battery in a low-temperature environment to ensure the normal operation and charging efficiency of the battery.

[0003] The heating film of the related art includes multiple film bodies, the multiple film bodies are respectively connected with the multiple battery cells of the battery module, the multiple film bodies are connected in series or in parallel with each other, and the multiple film bodies are electrically connected with the power output end of the battery module. Electricity is passed through the multiple film bodies to generate heat to heat the multiple battery cells.

[0004] However, when the multiple film bodies need to be installed, the number of battery cells of the battery module is usually large, and the one-by-one installation of the multiple film bodies reduces the installation efficiency of the heating film. CONTENT OF THE INVENTION

[0005] The application provides a battery heating film, a battery module and an automobile to solve the technical problem of the related art that the heating film needs to be installed one by one, thereby reducing the installation efficiency.

[0006] In a first aspect, the application provides a battery heating film, which includes multiple film bodies, multiple connecting pieces and a communication piece. The film bodies are used to simultaneously heat multiple battery cells on the same straight line of a battery module. The connecting pieces are arranged between adjacent film bodies and are used to electrically connect the adjacent film bodies. The multiple film bodies are connected head to tail through the multiple connecting pieces. The communication piece is arranged on the film bodies and is used to electrically connect the multiple film bodies with a power management system.

[0007] In some embodiments, the film bodies include multiple first connecting films, the multiple first connecting films are connected with each other, and the multiple first connecting films are located on the same straight line. The first connecting films are used to simultaneously heat at least two battery cells.

[0008] In some embodiments, the first connecting film includes multiple integrally arranged second connecting films, the multiple second connecting films are distributed along a length direction perpendicular to the multiple first connecting films, and the second connecting films are used to simultaneously heat at least two battery cells.

[0009] In some embodiments, the connecting piece includes a third connecting film, and the two ends of the third connecting film are respectively electrically connected with the same end of the adjacent film bodies.

[0010] In some embodiments, the connecting piece further comprises two fourth connecting films, two ends of the third connecting film are respectively electrically connected with two fourth connecting films, two fourth connecting films are respectively electrically connected with the same end of adjacent film bodies, the third connecting film is integrally arranged with two fourth connecting films, and the two ends of the third connecting film are electrically connected with the same end of adjacent film bodies through two fourth connecting films.

[0011] In some embodiments, the connecting piece comprises two end plates and two wires, the two end plates are respectively connected to the same end of the first and last film bodies in the plurality of film bodies, and the two wires are respectively electrically connected with the two end plates, and the two wires are respectively electrically connected with the input end and the output end of the power management system.

[0012] In some embodiments, a plurality of buckles are further included, the buckles are arranged on the wires, and the buckles are configured to be inserted into or detached from the through holes on the battery module to fix or detach the wires from the battery module.

[0013] In the second aspect, the application provides a battery module comprising a frame and the battery heating film arranged on the frame.

[0014] In some embodiments, the frame comprises a cross beam and a longitudinal beam, the cross beam is provided with a first avoiding slot for the film body to pass through, and the longitudinal beam is provided with a second avoiding slot for the connecting piece to pass through.

[0015] In the third aspect, the application provides an automobile comprising a vehicle body and the battery heating film arranged on the vehicle body.

[0016] The application provides a battery heating film, a battery module and an automobile. The battery heating film provided by the application can simultaneously heat a plurality of battery cells on the same straight line of the battery module by using the film body, so that the same film body can simultaneously heat a plurality of battery cells, thereby reducing the number of film bodies to be installed and improving the installation efficiency of the battery heating film. The use of the connecting piece facilitates the electrical connection between the plurality of film bodies, and the electrical connection between the adjacent film bodies, thereby reducing the number of connecting pieces to be installed and further improving the installation efficiency of the battery heating film. The use of the plurality of connecting pieces to connect the plurality of film bodies end to end enables the plurality of film bodies to be connected in series, facilitates the adjustment of the number of film bodies according to the number of battery cells, and enables the plurality of film bodies to be uniformly heated, thereby indirectly improving the heating quality of the battery heating film on the battery cells. The use of the connecting piece facilitates the communication between the plurality of film bodies and the power management system of the battery module, thereby facilitating the power supply to the battery heating film. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application.

[0018] Figure 1 A structural schematic diagram of a battery heating film provided by an embodiment of the application;

[0019] Figure 2 An enlarged view of part A in Figure 1

[0020] Figure 3 A structural schematic diagram of a battery heating film in an assembled state provided by an embodiment of the application;

[0021] Figure 4 A structural schematic diagram of a frame of a battery module provided by an embodiment of the application.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 100, film body; 110, first connecting film; 111, second connecting film;

[0024] 200, connecting piece; 210, third connecting film; 220, fourth connecting film;

[0025] 300, communicating piece; 310, end plate; 320, electric wire;

[0026] 400, buckle; 410, plug rod; 420, elastic plate;

[0027] 500, frame; 510, cross beam; 511, first avoiding slot; 520, longitudinal beam; 521, second avoiding slot;

[0028] 600, electric core.

[0029] The specific embodiments have been shown and described in the foregoing drawings and specification, it is to be understood that the application is not limited to the embodiments disclosed, but instead can be practiced with the scope of the claims. It is intended to cover any adaptations or variations of the specific implementations discussed herein. DETAILED DESCRIPTION

[0030] The exemplary embodiments will be described in detail herein below with reference to the drawings. The following description is merely exemplary in nature and is not intended to limit the present application, application, or uses to the specific embodiments described. Additionally, there description is not intended to cover all implementations of the application. Rather, it is intended to cover all alternatives consistent with the spirit and scope of the claims.

[0031] ​As described in the background, the related art heating film includes a plurality of film bodies, the plurality of film bodies are respectively connected with a plurality of battery cells of a battery module, the plurality of film bodies are connected in series or in parallel, the plurality of film bodies are electrically connected with a power output end of the battery module, and the plurality of film bodies are powered to generate heat to heat the plurality of battery cells.

[0032] However, when the plurality of film bodies need to be installed, the number of battery cells of the battery module is usually large, and the one-to-one installation of the plurality of film bodies and the plurality of battery cells reduces the installation efficiency of the heating film.

[0033] To solve the above technical problems, the embodiments of the present application provide a battery heating film, a battery module and a vehicle. By including a plurality of first connection films in the film body, the use of the plurality of first connection films can enable each first connection film to heat at least two battery cells at the same time, reducing the number of first connection films to be installed, thereby improving the installation efficiency of the plurality of first connection films. By including a plurality of second connection films in the first connection film, the use of the plurality of second connection films can enable each second connection film to heat at least two battery cells at the same time, so that the same first connection film can be connected with a larger number of battery cells, thereby further reducing the number of first connection films to be installed, thereby further improving the installation efficiency of the plurality of first connection films. By using the third connection film and the fourth connection film, the plurality of film bodies can be connected in series, reducing the number of connecting pieces for electrically connecting the plurality of film bodies, thereby further improving the installation efficiency of the battery heating film.

[0034] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following 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 the present application will be described below with reference to the accompanying drawings.

[0035] In combination with Figures 1 to 3 A battery heating film includes a plurality of film bodies 100, a plurality of connecting pieces 200 and a communication piece 300. The film body 100 is used to heat a plurality of battery cells 600 on the same straight line of a battery module at the same time. The connecting piece 200 is arranged between adjacent film bodies 100, and the connecting piece 200 is used to electrically connect the adjacent film bodies 100. The plurality of film bodies 100 are connected in series through the plurality of connecting pieces 200. The communication piece 300 is arranged on the film body 100, and the communication piece 300 is used to electrically connect the plurality of film bodies 100 with a power management system.

[0036] In the embodiment, four film bodies 100 are provided, and adjacent film bodies 100 are arranged at intervals; three connecting pieces 200 are provided, and adjacent connecting pieces 200 are located at two ends of the same film body 100, so that the four film bodies 100 can be connected in series through the three connecting pieces 200; the film body 100 is in the form of a rectangle as a whole, and the film body 100 can be adaptively adjusted according to the shape of the battery cell 600; in other embodiments, the number of the film body 100 and the connecting piece 200 can be adaptively adjusted as needed; or a plurality of film bodies 100 can be connected in parallel through a plurality of connecting pieces 200.

[0037] By adopting the above technical scheme, the plurality of battery cells 600 on the same straight line of the battery module are heated at the same time by the film body 100, so that the same film body 100 can heat the plurality of battery cells 600 at the same time, thereby reducing the installation number of the film body 100 and improving the installation efficiency of the battery heating film; the adoption of the connecting piece 200 facilitates the electrical connection between the plurality of film bodies 100, and the electrical connection between the adjacent film bodies 100, thereby reducing the installation number of the connecting piece 200 and further improving the installation efficiency of the battery heating film; the plurality of film bodies 100 are connected in series through the plurality of connecting pieces 200, so that the plurality of film bodies 100 can be connected in series, the number of the film body 100 can be adjusted according to the number of the battery cell 600, and the plurality of film bodies 100 can be uniformly heated, thereby indirectly improving the heating quality of the battery heating film on the battery cell 600; the adoption of the communication piece 300 facilitates the communication between the plurality of film bodies 100 and the power management system of the battery module, thereby facilitating the power supply to the battery heating film.

[0038] In combination with Figures 1 to 3 , the film body 100 includes a plurality of first connecting films 110, the plurality of first connecting films 110 are connected to each other, the plurality of first connecting films 110 are located on the same straight line, and the first connecting film 110 is used for heating at least two battery cells 600 at the same time.

[0039] In the embodiment, five first connecting films 110 are provided, and the first connecting film 110 is used for heating five battery cells 600 at the same time; the first connecting film 110 can be pasted on the battery cell 600 in the form of pasting; the electrical connection between the adjacent first connecting films 110 can be realized by directly connecting the heating resistance wires; in other embodiments, the length and number of the first connecting film 110 can be adaptively adjusted as needed, for example, the first connecting film 110 is connected to seven battery cells 600 at the same time, and fewer first connecting films 110 are needed to heat the plurality of battery cells 600 at the same time; or the electrical connection between the adjacent first connecting films 110 can be realized by using the terminal and the connector.

[0040] By adopting the above technical solution, the membrane body 100 includes multiple first connecting membranes 110. By using different numbers of first connecting membranes 110, different numbers of first connecting membranes 110 can be adapted to membrane bodies 100 of different lengths, thus improving the applicability of the membrane body 100. The length of the membrane body 100 can be adjusted by installing and removing adjacent first connecting membranes 110, thus improving the convenience of adjusting the length of the membrane body 100. By heating at least two battery cells 600 simultaneously with the first connecting membranes 110, the same first connecting membrane 110 can heat multiple battery cells 600, thereby reducing the number of connections of the first connecting membranes 110 and improving the installation efficiency of multiple first connecting membranes 110.

[0041] Combination Figures 1 to 3 The first connecting membrane 110 includes a plurality of integrally formed second connecting membranes 111, which are distributed along a length direction perpendicular to the plurality of first connecting membranes 110. The second connecting membranes 111 are used to heat at least two cells 600 simultaneously.

[0042] In this embodiment, two second connecting films 111 are provided, each of which is used to heat two battery cells 600 simultaneously. The second connecting films 111 can be fixed to the battery cells 600 by adhesive. In other embodiments, the length and number of the second connecting films 111 can be adaptively adjusted according to the width of the battery cells 600. By adjusting the length of the second connecting films 111, the coverage quantity and coverage area of ​​the first connecting films 110 can be indirectly increased.

[0043] By adopting the above technical solution, the width of each first connecting film 110 is increased by distributing multiple second connecting films 111 along a length direction perpendicular to the first connecting film 110. This allows first connecting films 110 of different widths to heat different numbers of battery cells 600, thereby further increasing the number of battery cells 600 that can be heated by a single first connecting film 110 and further reducing the installation efficiency of multiple first connecting films 110. By integrally setting multiple second connecting films 111, it is easier to produce the first connecting film 110 in one piece. Furthermore, by adjusting the number of second connecting films 111, the first connecting film 110 can have different widths, allowing different numbers of second connecting films 111 to be suitable for different numbers of battery cells 600. This improves the applicability of the first connecting film 110 and increases the production efficiency of multiple first connecting films 110.

[0044] Combination Figures 1 to 3 The connector 200 includes a third connecting membrane 210, the two ends of which are electrically connected to the same end of the adjacent membrane 100.

[0045] The connecting piece further comprises two fourth connecting films 220, two ends of the third connecting film 210 are electrically connected with the two fourth connecting films 220 respectively, the two fourth connecting films 220 are electrically connected with the same end of the adjacent membrane body 100 respectively, the third connecting film 210 is integrally arranged with the two fourth connecting films 220, and the two ends of the third connecting film 210 are electrically connected with the same end of the adjacent membrane body 100 through the two fourth connecting films 220.

[0046] In the embodiment, the width of the fourth connecting film 220 is the same as the width of the membrane body 100, the third connecting film 210 and the fourth connecting film 220 are both heating films that can heat the battery cell 600, thereby facilitating the production of the third connecting film 210 and the fourth connecting film 220; in other embodiments, the width of the fourth connecting film 220 can be smaller than the width of the membrane body 100; or the third connecting film 210 and the fourth connecting film 220 are replaced by the electric wire 320 or the conductive plate that can be electrified, so that the electric wire 320 and the conductive plate can also achieve the electrical connection between the adjacent membrane bodies 100.

[0047] By adopting the above technical scheme, by adopting the arrangement of the third connecting film 210 and the fourth connecting film 220, the third connecting film 210 and the fourth connecting film 220 can be produced simultaneously with the membrane body 100, thereby improving the production efficiency of the battery heating film; by connecting the two fourth connecting films 220 with the adjacent membrane bodies 100 respectively and connecting the third connecting film 210 between the two fourth connecting films 220, the adjacent membrane bodies 100 can be electrically connected through the third connecting film 210 and the fourth connecting film 220, the arrangement of the third connecting film 210 and the fourth connecting film 220 has a simple structure, and the connection effect of the electrical connection between the adjacent membrane bodies 100 is improved; and the fourth connecting film 220 can heat the battery cell 600, thereby further improving the heating efficiency of the battery cell 600; by integrally arranging the third connecting film 210 and the two fourth connecting films 220, the connecting piece 200 can be integrally produced, thereby improving the production efficiency of the connecting piece 200; and there is no need to additionally install and fix between the third connecting film 210 and the fourth connecting film 220, when connecting the adjacent membrane bodies 100, only the fourth connecting film 220 needs to be connected with the membrane body 100, thereby further improving the installation efficiency of the battery heating film.

[0048] In other embodiments, the third connecting film 210 and the fourth connecting film 220 can be arranged to have the same shape and size, and the third connecting film 210 and the fourth connecting film 220 can be produced separately, by arranging the third connecting film 210 and the fourth connecting film 220 to have the same shape and size, thereby facilitating the batch production of the third connecting film 210 and the fourth connecting film 220.

[0049] In combination Figures 1 to 3The communication piece 300 includes two end plates 310 and two electric wires 320. The two end plates 310 are connected to the same end of the first and last membrane bodies 100 in the plurality of membrane bodies 100 respectively. The two electric wires 320 are electrically connected to the two end plates 310 respectively. The two electric wires 320 are used to be electrically connected to the input end and the output end of the power management system respectively.

[0050] In the embodiment, the end plate 310 can be a copper bar capable of conducting electricity, or the end plate 310 is a heating film of the same material as the membrane body 100 and capable of heating the battery cell 600. The two end plates 310 are connected to the same end of the first and last first connecting membranes 110 in the four membrane bodies 100 respectively. The electric wire 320 and the heating resistance wire of the first connecting membrane 110 can be directly connected or connected through a terminal or a connector, so as to realize the electrical connection between the electric wire 320 and the first connecting membrane 110.

[0051] By adopting the above technical scheme, by arranging the end plate 310 at the same end of the first and last membrane bodies 100 and connecting the electric wire 320 with the input end and the output end of the power management system, the two end plates 310 and the two electric wires 320 can supply power to the plurality of membrane bodies 100 at the same time, thereby reducing the number of end plates 310 and electric wires 320, and improving the installation efficiency of the communication piece 300.

[0052] In combination with Figures 1 to 3 The battery heating film further includes a plurality of buckles 400 arranged on the electric wire 320. The buckle 400 is configured to be inserted into or detached from the through hole on the battery module to fix or detach the electric wire 320 from the battery module.

[0053] In the embodiment, the buckle 400 includes an insertion rod 410 and a plurality of elastic plates 420 arranged on the insertion rod 410 along the circumferential direction and the length direction of the insertion rod 410. By moving the insertion rod 410 towards the through hole of the battery module, the elastic plates 420 are deformed, so that the plurality of elastic plates 420 pass through the through hole, and the elastic plates 420 restore to the original state due to their own elastic force, thereby fixing the insertion rod 410 in the through hole. When it is necessary to disassemble the buckle 400, the insertion rod 410 can be pulled out of the through hole by force.

[0054] By adopting the above technical scheme, the plurality of buckles 400 are arranged to fix the electric wire 320 in the battery module, prevent the electric wire 320 from vibrating with the vehicle, thereby preventing the electric wire 320 from being disconnected from the short board, indirectly improving the electrical connection strength between the short board and the electric wire 320, and preventing the electric wire 320 from affecting other circuit elements in the battery module, thereby indirectly improving the power supply effect of the plurality of membrane bodies 100.

[0055] in combination Figure 3 and Figure 4 A battery module, comprising a frame 500 and the battery heating film of any one of the above embodiments arranged on the frame 500.

[0056] The specific structure of the battery heating film has been described in detail in the above embodiments, and will not be repeated here.

[0057] The frame 500 comprises a cross beam 510 and a longitudinal beam 520, the cross beam 510 is provided with a first avoiding groove 511 for the film body 100 to pass through, and the longitudinal beam 520 is provided with a second avoiding groove 521 for the connecting piece 200 to pass through; in this embodiment, the first avoiding groove 511 and the second avoiding groove 521 are both arranged in a "U" shape; when the film body 100 and the connecting piece 200 are arranged on the bottom surface of the battery cell 600, the first avoiding groove 511 and the second avoiding groove 521 are arranged on the top of the cross beam 510 and the longitudinal beam 520; when the film body 100 and the connecting piece 200 are arranged on the top surface of the battery cell 600, the first avoiding groove 511 and the second avoiding groove 521 are arranged on the bottom of the cross beam 510 and the longitudinal beam 520.

[0058] By adopting the above technical scheme, by adopting the arrangement of the first avoiding groove 511, the film body 100 can pass through the first avoiding groove 511 on the cross beam 510 of the frame 500, so that the cross beam 510 can be arranged closer to the film body 100, thereby making the structure between the cross beam 510, the film body 100 and the battery cell 600 more compact, thereby reducing the space occupation of the entire battery pack; by adopting the arrangement of the second avoiding groove 521, the connecting piece 200 can pass through the second avoiding groove 521 on the longitudinal beam 520 of the frame 500, so that the longitudinal beam 520 can be arranged closer to the connecting piece 200, thereby making the structure between the longitudinal beam 520, the connecting piece 200 and the battery cell 600 more compact, thereby reducing the space occupation of the entire battery pack.

[0059] A car, comprising a vehicle body and the battery heating film of any one of the above embodiments arranged on the vehicle body.

[0060] The specific structure of the battery heating film has been described in detail in the above embodiments, and will not be repeated here.

[0061] By including the film body 100 with multiple first connecting films 110, by adopting the arrangement of multiple first connecting films 110, each first connecting film 110 can heat at least two battery cells 600 at the same time, reducing the installation quantity of multiple first connecting films 110, thereby improving the installation efficiency of multiple first connecting films 110, by including the first connecting film 110 with multiple second connecting films 111, by adopting the arrangement of multiple second connecting films 111, each second connecting film 111 can heat at least two battery cells 600 at the same time, so that the same first connecting film 110 can be connected with more battery cells 600, thereby further reducing the installation quantity of multiple first connecting films 110, thereby further improving the installation efficiency of multiple first connecting films 110; by adopting the arrangement of the third connecting film 210 and the fourth connecting film 220, multiple film bodies 100 can be connected in series, reducing the installation quantity of the connecting piece 200 for electrically connecting multiple film bodies 100, thereby further improving the installation efficiency of the battery heating film.

[0062] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0063] It is to be understood that the application is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be defined by the claims appended hereto.

Claims

1. A battery heating film, characterized in that, The device includes multiple membranes (100), multiple connectors (200), and a connecting member (300). The membranes (100) are used to simultaneously heat multiple cells (600) on the same straight line of the battery module. The connectors (200) are provided between adjacent membranes (100) and are used to electrically connect adjacent membranes (100). The multiple membranes (100) are connected end to end through the multiple connectors (200). The connecting member (300) is provided on the membranes (100) and is used to electrically connect the multiple membranes (100) to the power management system.

2. The battery heating film according to claim 1, characterized in that, The membrane (100) includes a plurality of first connecting membranes (110), which are interconnected and located on the same straight line. The first connecting membranes (110) are used to heat at least two cells (600) simultaneously.

3. The battery heating film according to claim 2, characterized in that, The first connecting membrane (110) includes a plurality of integrally formed second connecting membranes (111), which are distributed along a length direction perpendicular to the plurality of first connecting membranes (110). The second connecting membranes (111) are used to heat at least two cells (600) simultaneously.

4. The battery heating film according to any one of claims 1-3, characterized in that, The connector (200) includes a third connecting membrane (210), the two ends of which are electrically connected to the same end of the adjacent membrane (100).

5. The battery heating film according to claim 4, characterized in that, The connector further includes two fourth connecting membranes (220). The two ends of the third connecting membrane (210) are electrically connected to the two fourth connecting membranes (220) respectively. The two fourth connecting membranes (220) are electrically connected to the same end of the adjacent membrane body (100) respectively. The third connecting membrane (210) is integrally formed with the two fourth connecting membranes (220). The two ends of the third connecting membrane (210) are electrically connected to the same end of the adjacent membrane body (100) through the two fourth connecting membranes (220).

6. The battery heating film according to any one of claims 1-3, characterized in that, The connecting member (300) includes two end plates (310) and two wires (320). The two end plates (310) are respectively connected to the same end of the first and last membrane (100) among a plurality of membranes (100). The two wires (320) are electrically connected to the two end plates (310) respectively. The two wires (320) are used to electrically connect to the input and output terminals of the power management system respectively.

7. The battery heating film according to claim 6, characterized in that, It also includes a plurality of clips (400) disposed on the wire (320), the clips (400) being configured to engage or disengage with through holes on the battery module to secure or detach the wire (320) from the battery module.

8. A battery module, characterized in that, It includes a frame (500) and a battery heating film as described in any one of claims 1-7 disposed on the frame (500).

9. The battery module according to claim 8, characterized in that, The frame (500) includes a crossbeam (510) and a longitudinal beam (520). The crossbeam (510) is provided with a first clearance groove (511) for the membrane (100) to pass through. The longitudinal beam (520) is provided with a second clearance groove (521) for the connector (200) to pass through.

10. A car, characterized in that, It includes a vehicle body and a battery heating film disposed on the vehicle body as described in any one of claims 1-7.

Images