Battery with heating and heat dissipation functions

Abstract

The utility model relates to the technical field of batteries, in particular to a battery with heating and heat dissipation functions, which comprises a shell, at least one battery cell arranged in the shell, and a heating film arranged on at least one side surface of the battery cell and / or the shell, the heating film is attached to the side face of the battery cell and / or the shell in a heat-resistant adhesive bonding or structure pressing mode. As the heating film is attached to the side surface of the battery cell and / or the shell, the heating film can receive current to generate heat so as to heat the whole battery through the side surface of the battery cell and / or the shell, and the battery has the advantages of high heating speed and uniform heating, so that the condition that an electric vehicle is difficult to start due to over-low temperature of the battery can be avoided in a low-temperature environment. Besides, when the battery is used for a long time and generates too high heat, the heating film contains materials with high heat conductivity coefficient, and the materials have very strong heat dissipation performance, so that the battery can be well cooled, and the battery has the advantage of high heat dissipation speed.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery with both heating and heat dissipation functions. Background Art

[0002] In order to alleviate environmental pollution and reduce energy consumption, new energy electric vehicles are becoming more and more popular. The key technology of electric vehicles lies in power batteries. However, the performance of power batteries is significantly affected by temperature. Too high or too low temperature will affect its performance and even cause safety problems such as thermal runaway and internal short circuit of the battery.

[0003] Due to seasonal changes or geographical conditions, when an electric vehicle is used for a long time in a high temperature environment, the battery temperature will be relatively high, and the heat needs to be dissipated as soon as possible to avoid safety problems. In addition, when in a low temperature environment, the low battery temperature can easily cause the electric vehicle to be difficult to start, which in turn affects the normal use of the electric vehicle, brings great inconvenience to users, and affects the overall performance of the electric vehicle.

[0004] Among them, low temperature has a great impact on the charging time of automobile batteries. The lower the temperature, the greater the resistance, and the greater the diffusion impedance of lithium ions in lithium-ion batteries, so the charging speed is slower. In addition, low temperature also has a great impact on cruising range and energy consumption. The cruising range at low temperature is only 68% of the cruising range at normal temperature, but its energy consumption is 134% of the energy consumption at normal temperature. The thermal management of batteries in winter is manifested in that active heating will consume additional battery energy. Improving heating efficiency has become a key link in solving the charging speed and cruising range in winter. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a battery with both heating and heat dissipation functions. The battery with both heating and heat dissipation functions has the advantages of fast and uniform heating in a low temperature environment, and fast heat dissipation in a high temperature environment. The battery is also energy-saving and environmentally friendly, and can avoid the reduction of battery charging speed and the influence of battery life and energy consumption in a low temperature environment.

[0006] In order to achieve the purpose of the above utility model, the technical solution adopted by the utility model is as follows:

[0007] The utility model provides a battery with both heating and heat dissipation functions, comprising a shell, at least one battery cell arranged in the shell, and a heating film arranged on at least one side of the battery cell and / or the shell;

[0008] The heating film is attached to the side of the battery core and / or the shell by means of heat-resistant adhesive bonding or structural compression.

[0009] Among them, the method of bonding with heat-resistant adhesive refers to bonding the heating film to the side of the battery cell and / or the shell with heat-resistant adhesive. Among them, the method of structural compression refers to fixing the heating film to one or more sides of the battery cell or the shell with structural parts. In addition, by adopting the method of structural compression, multiple battery cells can be closely arranged, and heating films are evenly arranged between two adjacent battery cells. The heating film is pressed between the battery cell layers or on the side of the battery shell by screws or snap fasteners, so as to achieve good surface contact.

[0010] The utility model discloses a battery with both heating and heat dissipation functions. Since a heating film is arranged on the side of the battery cell and / or the shell, the heating film contains conductive materials and can generate heat through conduction, so that the heating film can heat the battery. In addition, these conductive materials have strong heat dissipation performance even when they are not conductive. Since the heating film is in contact with the side of the battery cell and / or the battery in a surface-attached manner, it has the characteristics of uniform heating and fast heat dissipation. Therefore, the battery with both heating and heat dissipation functions has the advantages of fast and uniform heating in a low-temperature environment, and the advantage of fast heat dissipation in a high-temperature environment. The battery also has the advantages of energy saving and environmental protection.

[0011] Furthermore, the battery with both heating and heat dissipation functions comprises a shell, a battery cell disposed in the shell, and a heating film disposed on one side surface of the shell;

[0012] The heating film is attached to the side surface of the shell by means of heat-resistant adhesive bonding or structural compression.

[0013] Furthermore, the battery with both heating and heat dissipation functions comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on two opposite sides of each of the battery cells;

[0014] The heating film is attached to two opposite sides of the battery core by means of heat-resistant adhesive bonding or structural compression.

[0015] Furthermore, the battery with both heating and heat dissipation functions comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on one side surface of the shell;

[0016] The heating film is attached to the side surface of the shell by means of heat-resistant adhesive bonding or structural compression.

[0017] Furthermore, the battery with both heating and heat dissipation functions comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on two opposite sides of the shell;

[0018] The heating film is attached to two opposite sides of the shell by means of heat-resistant adhesive bonding or structural compression.

[0019] Furthermore, in the battery with both heating and heat dissipation functions, the heating film includes a first heating film and a second heating film electrically connected by a wire, so that the heating films on two opposite sides of each battery cell can be controlled at the same time, or the heating films on two opposite sides of the shell can be controlled at the same time.

[0020] Furthermore, the battery with both heating and heat dissipation functions comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on two opposite sides of each of the battery cells and one side of the shell;

[0021] The heating film is attached to two opposite sides of the battery core and one side of the shell by means of heat-resistant adhesive bonding or structural compression.

[0022] Furthermore, in the battery with both heating and heat dissipation functions, the heating films on the two opposite sides of the battery cell include a first heating film and a second heating film electrically connected by a wire, thereby being able to simultaneously control the heating films on the two opposite sides of each battery cell.

[0023] Furthermore, the heating film includes a conductive layer, two metal electrodes disposed on both sides of the outer surface of the conductive layer, and two outwardly extending wires respectively welded to the two metal electrodes; wherein the metal electrodes include copper bars, silver bars, and aluminum bars. The metal electrodes are used to transmit current, and the metal electrodes are directly attached and contacted to the surface of the conductive layer, and can transmit the current of the metal electrodes to the conductive layer.

[0024] and / or

[0025] The metal electrode is a metal strip; or, the metal electrode includes a silver paste conductive strip or a carbon paste conductive strip, and a metal strip disposed on the outer surface of the silver paste conductive strip or the carbon paste conductive strip. The silver paste conductive strip or the carbon paste conductive strip is formed by printing silver paste or carbon paste on the conductive layer and then drying it to form a stable coating structure, and then the metal strip is disposed on the silver paste conductive strip or the carbon paste conductive strip. The external current is transmitted to the metal strip through the wire, and then transmitted from the metal strip to the silver paste conductive strip or the carbon paste conductive strip. Among them, silver paste conductive strips or carbon paste conductive strips are first printed on the upper surface of the conductive layer, so that the conductive paste coating formed by the silver paste or carbon paste can be closely attached to the conductive layer of the polymer substrate to form a continuous electrode with stronger bonding force. Because the formed silver paste conductive strips or carbon paste conductive strips are flexible, they can be curled or bent together with the flexible conductive layer. However, the resistance of the silver paste conductive strips or carbon paste conductive strips is relatively large over a long distance, and temperature differences and unevenness problems may occur. Therefore, an extremely low resistance metal strip is arranged on the upper surface of the silver paste conductive strips or carbon paste conductive strips, which can compensate for the voltage loss of the silver paste conductive strips or carbon paste conductive strips and reduce the temperature difference and unevenness problems. At the same time, compared with the conductive coating of the silver paste conductive strips or carbon paste conductive strips formed by silver paste or carbon paste, it is more convenient to further connect external wires through the metal strips.

[0026] Furthermore, the conductive layer includes a polymer substrate and a conductive substance dispersed in the polymer substrate; wherein the polymer substrate includes liquid crystal polymer, polyphenylene ether, polyphenylene sulfide, polyimide, polyetheretherketone, polyetherketoneketone, has high temperature resistance and is easy to disperse the conductive substance, so that the conductive effect of the entire conductive layer is good. And / or

[0027] The conductive material includes one or a combination of two or more of carbon nanotubes, graphene, conductive carbon black or ionic polymers. The carbon nanotubes, graphene, conductive carbon black or ionic polymers have both good dispersibility and good conductivity.

[0028] Furthermore, the wire is connected to an external power circuit, wherein the external power circuit is used to directly access a power source, and then the current is transmitted to the metal electrode through the wire, and then to the conductive layer, and after the conductive layer receives the current, the entire conductive layer can generate heat and generate heat, and the generated heat then heats the battery.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] (1) The utility model discloses a battery with both heating and heat dissipation functions, comprising a shell, at least one battery cell arranged in the shell, and a heating film arranged on at least one side of the battery cell and / or the shell; the heating film is attached to the side of the battery cell and / or the shell by means of heat-resistant adhesive bonding or structural compression. Since the heating film is attached to the side of the battery cell and / or the shell, the heating film can receive current and generate heat, and then heat the entire battery through the side of the battery cell and / or the shell, and has the advantages of fast heating and uniform heating, and thus in a low temperature environment, it can avoid the situation where the electric vehicle is difficult to start due to the low battery temperature. In addition, when the battery is used for a long time and the heat is too high, the heating film contains high thermal conductivity materials such as carbon nanotubes, graphene, conductive carbon black or ionic polymers, and these materials have very strong heat dissipation performance, and thus can play a good heat dissipation role for the battery, and has the advantage of fast heat dissipation.

[0031] (2) The utility model is a battery that has both heating and heat dissipation functions. Since the heating film is directly attached to the side of the battery cell and / or the shell, it is a surface-type heating film that can generate heat or dissipate heat as a whole. Therefore, the battery has the advantages of fast and uniform heating in a low-temperature environment, and fast heat dissipation in a high-temperature environment. In addition, compared with the traditional heating or heat dissipation method, the battery can both heat and dissipate heat, and it also has the advantages of energy saving and environmental protection.

[0032] (3) The utility model provides a battery with both heating and heat dissipation functions. Since the battery can be evenly heated by the heating film in a low temperature environment and has a high heating efficiency, it can ensure the charging speed of the car in winter without affecting the battery life and battery energy consumption.

[0033] (4) The utility model is a battery with both heating and heat dissipation. The heating film is connected to a voltage of 36V to 440V, and the resistance of the heating film is controlled and adjusted so that the heating film can achieve a heating temperature of 30℃ to 200℃ and a power of 40W / m 2 ~8000W / m 2 The heating uniformity of the heating film is very good, so that the battery with both heating and heat dissipation has the advantage of good heating uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1It is a schematic diagram of the exploded structure of a battery with both heating and heat dissipation functions according to Example 1 of the utility model.

[0036] Figure 2 It is a schematic diagram of the exploded structure of a battery with both heating and heat dissipation functions according to Example 3 of the utility model.

[0037] Figure 3 It is a schematic diagram of the exploded structure of a battery with both heating and heat dissipation functions according to Example 5 of the utility model.

[0038] Figure 4 It is a schematic diagram of the structure of the heating film of Example 1, Example 4 and Example 5 of the utility model.

[0039] Figure 5 It is a schematic structural diagram of the heating film of Example 1 of the utility model.

[0040] Figure 6 It is a schematic structural diagram of the heating film of Example 7 of the utility model.

[0041] In the figure: housing 1, battery cell 2, heating film 3, first heating film 31, second heating film 32, wire 4;

[0042] Conductive layer 51 , metal electrode 52 , wire 53 , silver paste conductive strip or carbon paste conductive strip 521 , and metal strip 522 . DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. In the present invention, the singular forms "a", "said" and "the" used in the embodiments and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0045] The following describes the invention in conjunction with specific embodiments.

[0046] Example 1

[0047] A battery with both heating and heat dissipation functions in this embodiment, such as Figure 1 As shown, it includes a housing 1, and two or more battery cells 2 ( Figure 1There are five battery cells 2 in the figure, and the number of battery cells 2 can be set according to the actual application needs of the battery), and heating films 3 are arranged on two opposite sides of each battery cell 2. Among them, the heating film 3 is attached to the two opposite sides of the battery cell 2 by means of heat-resistant adhesive bonding or structural compression. Among them, the heating film 3 is attached by means of heat-resistant adhesive bonding or structural compression, which can make the heating film 3 and the battery cell 2 firmly and tightly attached, and then when the heating film 3 is heated by conductive heating, it is convenient to transfer the generated heat to the battery cell 2, which has the advantages of high heating efficiency, fast heating and uniform heating.

[0048] In this embodiment, the heating film 3 includes a first heating film 31 and a second heating film 32 electrically connected by a wire 4. After the first heating film 31 and the second heating film 32 are electrically connected by the wire 4, the heating film 3 is respectively attached to two opposite sides of the battery cell 2, which can facilitate simultaneous control of the heating films 3 on the two sides for heating, and has the advantages of simple structure, easy control and fast heating. Among them, the upper and lower ends of the first heating film 31 and the second heating film 32 are connected with wires 4.

[0049] In this embodiment, Figure 5 As shown, the heating film 3 includes a conductive layer 51, two metal electrodes 52 arranged on both sides of the outer surface of the conductive layer 51, and two outwardly extending wires 53 respectively welded to the two metal electrodes 52; wherein the metal electrode 52 is a metal strip, and the metal strip includes a copper strip, a silver strip, and an aluminum strip. The metal electrode 52 is used to transmit current, and the metal electrode 52 is directly attached and contacted to the surface of the conductive layer 51, and can transmit the current of the metal electrode 52 to the conductive layer 51. Among them, the two metal electrodes 52 are electrically connected to the wires 4 at the upper and lower ends of the heating film 3, respectively, so that the first heating film 31 and the second heating film 32 transmit current as a whole and generate heat evenly.

[0050] Among them, the conductive layer 51 includes a polymer substrate and a conductive substance dispersed in the polymer substrate; wherein the polymer substrate includes liquid crystal polymer, polyphenylene ether, polyphenylene sulfide, polyimide, polyetheretherketone, polyetherketoneketone, has the characteristics of high temperature resistance, and is easy to disperse the conductive substance, so that the conductive effect of the entire conductive layer 51 is good.

[0051] The conductive material includes one or a combination of two or more of carbon nanotubes, graphene, conductive carbon black or ionic polymers, which have both good dispersibility and good conductivity.

[0052] The wire 53 is connected to the external power circuit, which is used to directly connect to the power supply, and then the current is transmitted to the metal electrode 52 through the wire 53, and then to the conductive layer 51. After the conductive layer 51 receives the current, the entire conductive layer 51 can generate heat and generate heat, and the generated heat then heats the battery.

[0053] In the battery with both heating and heat dissipation functions of the present embodiment, the heating film 3 is connected to a voltage of 36V to 220V, and the resistance of the heating film 3 is controlled and adjusted so that the heating film 3 can achieve a heating temperature of 40°C to 200°C, and the heating uniformity of the heating film 3 is very good, thereby making the battery with both heating and heat dissipation functions have the advantage of good heating uniformity.

[0054] The resistance of the heating film 3 may be controlled and adjusted by setting the thickness of the conductive material in the conductive layer 51 or by adjusting the distance between the two metal electrodes 52 on both sides of the conductive layer 51 .

[0055] Among them, in practical applications, the thickness of the heating film 3 can be in the range of 0.02mm to 1mm; wherein, the heating film 3 of this thickness can not only ensure good conductive heating performance, but also ensure good softness of the heating film 3, which is convenient for processing operations such as bonding or pressing.

[0056] Among them, the heating uniformity of the heating film 3 is very good.

[0057] Example 2

[0058] This embodiment is a battery with both heating and heat dissipation functions. The difference between this embodiment and embodiment 1 is that only one side of the battery cell 2 is provided with a heating film 3. When the application environment of the battery is not particularly low temperature or other application scenarios are considered, providing a heating film 3 on one side of the battery cell 2 is sufficient to enable the battery to heat or dissipate heat when needed.

[0059] The heating films 3 disposed on one side of the five battery cells 2 may also be electrically connected to each other through wires, so that the heating of the five battery cells 2 can be controlled at the same time.

[0060] Example 3

[0061] The present embodiment is a battery with both heating and heat dissipation functions. The difference between the present embodiment and the first embodiment is that: Figure 2 As shown, it includes a housing 1, and two or more battery cells 2 ( Figure 2There are five battery cells 2 in the shell, and the number of battery cells 2 can be set according to the actual application needs of the battery), and a heating film 3 is arranged on one of the sides of the shell 1. Among them, when in actual application, some batteries have been packaged and it is not convenient to disassemble and assemble the battery cells 2, by directly attaching the heating film 3 to one of the sides of the battery shell 1, this embodiment is attached to the upper surface of the battery, which can also make the battery have faster heating and heat dissipation functions. Among them, when multiple battery cells 2 are packaged in the shell, a battery pack is formed, and the heating film 3 is attached to the shell 1 of the battery pack. When the heating film 3 is heated, the entire battery pack is heated.

[0062] The heating film 3 is attached to the side of the housing 1 by means of heat-resistant adhesive bonding or structural compression. The heating film 3 is attached by means of heat-resistant adhesive bonding or structural compression, so that the heating film 3 and the housing 1 are firmly and tightly attached, and when the heating film 3 is heated by electrical conduction, the generated heat is easily transferred to the housing 1, which has the advantages of high heating efficiency, fast heating and uniform heating.

[0063] Example 4

[0064] A battery with both heating and heat dissipation functions in this embodiment, such as Figure 4 As shown, the difference between this embodiment and embodiment 3 is that heating films 3 are provided on two opposite sides of the housing 1. When the battery has been packaged and it is inconvenient to disassemble the battery cell 2, and the application environment of the battery is particularly low temperature or other application scenarios are considered, heating films 3 are provided on two opposite sides of the housing 1, so that the battery can be quickly heated or dissipated when needed.

[0065] In this embodiment, the heating film 3 includes a first heating film 31 and a second heating film 32 electrically connected by a wire 4. After the first heating film 31 and the second heating film 32 are electrically connected by the wire 4, the heating film 3 is respectively attached to two opposite sides of the housing 1, so that the heating films 3 on the two sides can be controlled to heat at the same time, which has the advantages of simple structure, easy control and fast heating.

[0066] Example 5

[0067] The present embodiment is a battery with both heating and heat dissipation functions. The difference between the present embodiment and the first embodiment is that: Figure 3 and Figure 4 As shown, it includes a housing 1, and two or more battery cells 2 ( Figure 3There are five battery cells 2, and the number of battery cells 2 can be set according to the actual application needs of the battery), and heating films 3 are arranged on two opposite sides of each battery cell 2 and one side of the shell 1. Since the heating film 3 is not only arranged on two opposite sides of the battery cell 2, but also on one side of the shell 1, the battery with both heating and heat dissipation in this embodiment has good heating and heat dissipation effects, and the heating rate of the battery is faster and the heat dissipation effect is better.

[0068] The heating film 3 is attached to two opposite sides of the battery cell 2 and one side of the shell 1 by means of heat-resistant adhesive bonding or structural compression. The heating film 3 is attached by means of heat-resistant adhesive bonding or structural compression, so that the heating film 3 can be firmly and tightly attached to the battery cell 2 and the shell 1, and when the heating film 3 is heated by electrical conduction, it is convenient to transfer the generated heat to the battery cell 2 and the shell 1, which has the advantages of high heating efficiency, fast heating and uniform heating.

[0069] In this embodiment, the heating films 3 on two opposite sides of the battery core 2 include a first heating film 31 and a second heating film 32 electrically connected by a wire 4 .

[0070] Example 6

[0071] The present embodiment is a battery with both heating and heat dissipation functions. The present embodiment is different from the first embodiment in that it comprises a housing 1, a battery cell 2 disposed in the housing 1, and a heating film 3 disposed on one side surface of the housing 1.

[0072] The heating film 3 is attached to the side of the housing 1 by means of heat-resistant adhesive bonding or structural compression. The heating film 3 is attached by means of heat-resistant adhesive bonding or structural compression, so that the heating film 3 and the housing 1 are firmly and tightly attached, and when the heating film 3 is heated by electrical conduction, the generated heat is easily transferred to the housing 1, which has the advantages of high heating efficiency, fast heating and uniform heating.

[0073] Example 7

[0074] A battery with both heating and heat dissipation functions in this embodiment, such as Figure 6As shown, the difference between this embodiment and embodiment 1 is that the metal electrode 52 includes a silver paste conductive strip or a carbon paste conductive strip 521, and a metal strip 522 arranged on the outer surface of the silver paste conductive strip or the carbon paste conductive strip 521; wherein the silver paste conductive strip or the carbon paste conductive strip 521 is formed by printing silver paste or carbon paste on the conductive layer 51 and then drying it to form a stable coating structure, and then the metal strip 522 is arranged on the silver paste conductive strip or the carbon paste conductive strip 521. wherein the external current is transmitted to the metal strip 522 through the wire 53, and then transmitted to the silver paste conductive strip or the carbon paste conductive strip 521 by the metal strip 522. Among them, silver paste conductive strips or carbon paste conductive strips 521 are first printed on the upper surface of the conductive layer 51, so that the conductive paste coating formed by the silver paste or carbon paste can be closely attached to the conductive layer 51 of the polymer substrate to form a continuous electrode with stronger bonding force. Because the silver paste conductive strips or carbon paste conductive strips 521 formed are flexible, they can be curled or bent together with the flexible conductive layer 51. However, the silver paste conductive strips or carbon paste conductive strips 521 have a relatively large resistance over a long distance, and temperature differences and unevenness problems may occur. Therefore, a metal strip 522 with extremely low resistance is arranged on the upper surface of the silver paste conductive strips or carbon paste conductive strips 521, which can compensate for the voltage loss of the silver paste conductive strips or carbon paste conductive strips 521 and reduce the temperature difference and unevenness problems. At the same time, compared with the conductive coating of the silver paste conductive strips or carbon paste conductive strips 521 formed by silver paste or carbon paste, it is more convenient to further connect the external wire 53 through the metal strip 522.

[0075] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery with both heating and heat dissipation, characterized in that: The invention comprises a shell, at least one battery cell arranged in the shell, and a heating film arranged on at least one side of the battery cell and / or the shell; The heating film is attached to the side of the battery core and / or the shell by means of heat-resistant adhesive bonding or structural compression.

2. A battery with both heating and heat dissipation functions as claimed in claim 1, characterized in that: It comprises a shell, a battery cell arranged in the shell, and a heating film arranged on one side surface of the shell; The heating film is attached to the side surface of the shell by means of heat-resistant adhesive bonding or structural compression.

3. A battery with both heating and heat dissipation functions as claimed in claim 1, characterized in that: The invention comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on two opposite sides of each of the battery cells; The heating film is attached to two opposite sides of the battery core by means of heat-resistant adhesive bonding or structural compression.

4. A battery with both heating and heat dissipation functions as claimed in claim 1, characterized in that: It comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on one side of the shell; The heating film is attached to the side surface of the shell by means of heat-resistant adhesive bonding or structural compression.

5. A battery with both heating and heat dissipation functions as claimed in claim 1, characterized in that: The invention comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on two opposite sides of the shell; The heating film is attached to two opposite sides of the shell by means of heat-resistant adhesive bonding or structural compression.

6. A battery with both heating and heat dissipation functions as claimed in claim 3 or 5, characterized in that: The heating film comprises a first heating film and a second heating film electrically connected by a wire.

7. A battery with both heating and heat dissipation functions as claimed in claim 1, characterized in that: The invention comprises a shell, two or more battery cells arranged in the shell, and a heating film arranged on two opposite sides of each of the battery cells and one side of the shell; The heating film is attached to two opposite sides of the battery core and one side of the shell by means of heat-resistant adhesive bonding or structural compression.

8. A battery with both heating and heat dissipation functions as claimed in claim 7, characterized in that: The heating films on two opposite sides of the battery core include a first heating film and a second heating film electrically connected by a wire.

9. A battery with both heating and heat dissipation functions as claimed in claim 1, characterized in that: The heating film comprises a conductive layer, two metal electrodes arranged on both sides of the outer surface of the conductive layer, and two outwardly extending wires respectively welded to the two metal electrodes; and / or The metal electrode is a metal strip; or, the metal electrode includes a silver paste conductive strip or a carbon paste conductive strip, and a metal strip disposed on the outer surface of the silver paste conductive strip or the carbon paste conductive strip.

10. A battery with both heating and heat dissipation functions as claimed in claim 9, characterized in that: The wire is connected to an external power supply circuit.

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