Battery module, battery box and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery module, a battery box and electric equipment. The battery module comprises a battery unit and a heat exchange assembly, and the battery unit comprises at least one single battery; the heat exchange assembly comprises a heat conduction piece and a heating piece, and the heat conduction piece and the heating piece are arranged on the two opposite sides of at least one single battery in the battery unit and used for conducting heat exchange with the single battery. The battery module can timely and effectively adjust the temperature of the single batteries under high-temperature and low-temperature conditions, so that the structural performance of the batteries can be repeatedly exerted, and the safety performance of the batteries can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module, a battery box and an electrical equipment. Background Art

[0002] With the rapid development of the new energy vehicle industry, the power lithium-ion battery technology has been rapidly improved, and the energy density and rate performance have been continuously enhanced. However, the problem of excessive battery temperature rise during fast charging or high-rate discharging follows. The development and design of an efficient battery heat dissipation system have become the key technical problems restricting the battery operation safety.

[0003] The current battery heat dissipation methods mainly include air cooling, liquid cooling, phase change materials, and the coupling of liquid cooling and phase change materials. However, the heat dissipation effect of the air cooling method is limited. The liquid cooling method requires the whole machine to be equipped with a corresponding liquid cooling unit. The phase change materials have a certain heat dissipation upper limit. When the whole machine does not have a liquid cooling unit, a good heat dissipation effect cannot be achieved. When the power of the liquid cooling unit is large, it is easy to cause a large temperature difference between batteries, affecting the cycle performance.

[0004] When the ambient temperature is low, it is necessary to heat the battery pack to quickly achieve good charge and discharge capabilities. The existing heating methods have problems of low temperature rise rate and large temperature difference.

[0005] Therefore, there is an urgent need to provide a battery module that can effectively adjust the temperature of single cells under both high temperature and low temperature conditions. Summary of the Utility Model

[0006] The utility model provides a battery module, a battery box and an electrical equipment. The battery module can timely and effectively adjust the temperature of single cells under both high temperature and low temperature conditions to repeatedly exert the structural performance of the battery and improve the safety performance of the battery.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] According to the first aspect of the utility model, a battery module is provided. The battery module includes: a battery unit and a heat exchange component. The battery unit includes at least one single cell. The heat exchange component includes a heat conducting member and a heating member. The heat conducting member and the heating member are arranged on opposite sides of at least one single cell in the battery unit for heat exchange with the single cell.

[0009] According to the second aspect of the utility model, a battery box is provided, including the battery module provided by any technical solution in the first aspect above.

[0010] According to the third aspect of the utility model, an electrical equipment is provided, including the battery box provided by any technical solution in the second aspect above.

[0011] It should be noted that the battery module provided by this application can dissipate heat by using the heat-conducting member in this structure, enabling the internal temperature of the single battery to be quickly transferred to the outside under high-temperature or high-rate working conditions, so as to assist heat dissipation methods such as air cooling or liquid cooling to take away the heat at the single battery, making the battery module in good temperature conditions. At the same time, when the battery module provided by this application works under low-temperature conditions, the heating member can be turned on to heat the single battery, making the temperature evenly distributed at the single battery to fully exert the battery performance. It should be noted that at this time, after the heat of the heating member is transferred to the single battery, it can also be balanced through the heat-conducting member to achieve an even-temperature effect.

[0012] Therefore, the battery module can timely and effectively adjust the temperature of the single battery under high-temperature and low-temperature conditions to repeatedly exert the structural performance of the battery and improve the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, related elements or components may have different arrangements as known in the art. Moreover, in the drawings, the same reference numerals denote the same or similar components in each drawing. Among them:

[0014] Figure 1 is a schematic structural diagram of the battery module provided by the embodiment of this application;

[0015] Figure 2 is Figure 1 a schematic structural diagram of the heat-conducting member in ;

[0016] Figure 3 is Figure 1 a three-dimensional structural diagram of a partial structure in.

[0017] The reference numerals are explained as follows:

[0018] 100, battery cell; 110, single battery; 200, heat exchange assembly; 210, heating member; 220, heat-conducting member; 221, first sub-pad; 2211, heat-conducting layer; 2212, buffer layer; 222, second sub-pad; 300, insulating film; 400, end insulating plate; S1, large surface; S2, side surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the protection scope of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present disclosure.

[0020] In the description of the present disclosure, unless otherwise clearly defined and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more; the term "and / or" includes any combination and all combinations of one or more of the associated listed items. In particular, referring to "the / this" object or "one" object is also intended to mean one of the possible multiple such objects.

[0021] Unless otherwise specified or stated, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0022] Furthermore, in the description of the present disclosure, it should be understood that the orientation terms such as "upper", "lower", "inner", and "outer" described in the exemplary embodiments of the present disclosure are described from the angles shown in the accompanying drawings and should not be understood as limiting the exemplary embodiments of the present disclosure. It should also be understood that in the context, when it is mentioned that an element or feature is connected "on", "under", or "inside", "outside" another element (one or more), it can not only be directly connected "on", "under", or "inside", "outside" another (one or more) element, but also be indirectly connected "on", "under", or "inside", "outside" another (one or more) element through an intermediate element.

[0023] In a first aspect, an embodiment of the present application provides a battery module. As Figure 1 shown, the battery module provided by the embodiment of the present application includes: a battery unit 100 and a heat exchange component 200. The battery unit 100 includes at least one single battery 110; the heat exchange component 200 includes a heat conducting member 220 and a heating member 210. The heat conducting member 220 and the heating member 210 are disposed on opposite sides of at least one single battery 110 in the battery unit 100 for heat exchange with the single battery 110. It should be understood that the number of single batteries 110 in the battery unit 100 can be one or more, which can be specifically set according to requirements.

[0024] Specifically, in the battery module provided by the embodiments of the present application, the heat exchange component 200 is located on both sides of at least one single battery 110 in the battery unit 100 to perform heat exchange with the single battery 110, so that the temperature of the single battery 110 quickly reaches the preset temperature range, thereby ensuring the safety performance and structural performance of the battery module.

[0025] It can be understood that the heat exchange process between the heat exchange component 200 and the single battery 110 can be specifically as follows: the heat exchange component 200 provides heat to the single battery 110 so that the single battery 110 can be heated up in a colder environment, or specifically, the single battery 110 provides heat to the heat exchange component 200 so that the heat at the single battery 110 can be quickly dissipated through the heat exchange component 200 to prevent the single battery 110 from overheating.

[0026] In the heat exchange component 200 provided by the embodiments of the present application, the heating element 210 is used to provide heat for the single battery 110, and the heat conducting element 220 is used to conduct the heat at the single battery 110. Specifically, the heating element 210 can be turned on when the single battery 110 is in a low temperature condition to heat the single battery 110 so that the temperature of the single battery 110 is evenly distributed to fully exert the battery performance; the heat conducting element 220 can be used when the single battery 110 is in a high temperature condition to conduct the heat inside the single battery 110 so that the relatively high temperature at the single battery 110 is effectively dissipated through the heat conducting element 220.

[0027] It should be noted that the battery module provided by the embodiments of the present application can make the internal temperature of the single battery 110 quickly transfer to the outside under high temperature or high rate working conditions by using the heat conducting element 220 in this structure, so as to facilitate heat dissipation methods such as assisted air cooling or liquid cooling to take away the heat at the single battery 110, making the battery module in a good temperature condition. At the same time, when the battery module provided by the embodiments of the present application works under low temperature conditions, the heating element 210 can be turned on to heat the single battery 110 so that the temperature at the single battery 110 is evenly distributed to fully exert the battery performance. It should be noted that at this time, after the heat of the heating element 210 is transferred to the single battery 110, it can also be balanced through the heat conducting element 220 to achieve a temperature equalization effect.

[0028] Therefore, the battery module can timely and effectively adjust the temperature of the single battery 110 under high temperature and low temperature conditions to repeatedly exert the structural performance of the battery and improve the safety performance of the battery.

[0029] In one embodiment, the battery cell 100 includes 2N single cells 110, where N is a positive integer greater than or equal to 1. Accordingly, heating elements 210 or heat conducting elements 220 can be provided on both sides of one or more single cells 110 within the battery cell 100 to ensure that the structural performance of the battery cell 100 can be effectively exerted at both lower and higher temperatures.

[0030] Taking the battery cell 100 including two single cells 110 as an example, heat conducting elements 220 and heating elements 210 can be provided on both sides of each battery cell 100. Of course, in order to improve the space utilization rate within the battery module, adjacent single cells 110 can share the heat conducting elements 220 and / or heating elements 210.

[0031] As an example, please continue to refer to Figure 2 the structure shown. Taking the first battery cell 100 as an example, a heat conducting element 220 is provided on one side of a single cell 110 facing away from another single cell 110, and adjacent two single cells 110 share a heating element 210.

[0032] In one embodiment, along the arrangement direction of the plurality of single cells 110, in the heat exchange module 200 corresponding to the plurality of single cells 110, the heat conducting elements 220 and the heating elements 210 are alternately arranged in sequence to reasonably layout the plurality of heat exchange modules 200 within the battery module, improve the heat exchange effect between the heat exchange module 200 and the single cell 110, and improve the space utilization rate within the battery module.

[0033] It should be noted that in this embodiment, it can be specifically set that heating elements 210 and heat conducting elements 220 are provided on both sides of some single cells 110, or it can be specifically set that on one side of the opposite sides of each single cell 110, a heat conducting element 220 is provided, and on the other side, a heating element 210 is provided.

[0034] It should be understood that when heat conducting elements 220 and heating elements 210 are provided on both sides of each single cell 110, the structural performance of each single cell 110 can be effectively exerted at both lower and higher temperatures.

[0035] Please continue to refer to Figure 2In the structure shown, as an example, the battery module is provided with four battery cells 100, and the four battery cells 100 are arranged in sequence. Each battery cell 100 includes two single cells 110, and the multiple single cells 110 in the multiple battery cells 100 are arranged in sequence. Specifically, along the arrangement direction of the multiple single cells 110, the first single cell 110 and the second single cell 110 form the first battery cell 100; the third single cell 110 and the fourth single cell 110 form the second battery cell 100; the fifth single cell 110 and the sixth single cell 110 form the third battery cell 100; the seventh single cell 110 and the eighth single cell 110 form the fourth battery cell 100.

[0036] Taking the first battery cell 100 as an example, a heat conducting member 220 is provided on the side of the first single cell 110 facing away from the second single cell 110, and a heating member 210 is provided between the first single cell 110 and the second single cell 110; taking the second battery cell 100 as an example, a heat conducting member 220 is provided on the side of the third single cell 110 facing away from the fourth single cell 110, and a heating member 210 is provided between the third single cell 110 and the fourth single cell 110. It should be noted that the second battery cell 100 shares the heating member 210 with the first battery cell 100 to ensure that heat exchange components 200 are provided on both sides of each single cell 110, and to make the heat conducting member 220 and the heating member 210 be arranged alternately in sequence.

[0037] Please continue to refer to Figure 1 In the structure shown, the battery module provided by the embodiment of the present application further includes end insulating plates 400, and the end insulating plates 400 are arranged on opposite sides of the whole formed by the multiple battery cells 100 along the arrangement direction of the multiple battery cells 100 to form insulation protection for the whole and ensure the safety performance of the battery module.

[0038] In one embodiment, the heat conducting member 220 is a heat conducting pad. The heat conducting pad can play a buffering role between the single cells 110 and absorb the expansion force during the charging and discharging of the single cells 110 to ensure the structural performance of the single cells 110.

[0039] In one embodiment, please refer to Figure 2 and Figure 3 In the structure shown, the heat conducting pad includes a first sub-pad 221 and a second sub-pad 222, and the second sub-pad 222 is connected to the first sub-pad 221 and forms an L-shaped structure with the first sub-pad 221. It should be understood that Figure 2 the dashed line is used in to schematically separate the first sub-pad 221 and the second sub-pad 222, and the specific separation position of the first sub-pad 221 and the second sub-pad 222 is not limited to this.

[0040] It should be noted that, on the basis of ensuring the heat transfer effect of the thermal pad on the single battery 110, the structure of the thermal pad is simplified in the battery module provided by the embodiments of the present application to facilitate the manufacture of the thermal pad. It is worth noting that the thermal pad used in the battery module has good bending resistance, can buffer the expansion force generated when the battery expands to ensure battery performance. At the same time, the good bending resistance enables the thermal pad to form an integrated L-shaped structure to reduce the preparation difficulty.

[0041] In one embodiment, please refer to Figure 1 and Figure 2 for reference Figure 3 to the structure shown in

[0042] The battery includes two large surfaces S1 arranged oppositely and four side surfaces S2 arranged around the large surface S1. Among them, the area of the side surface S2 is smaller than the area of the large surface S1, and the arrangement direction of the two large surfaces S1 is parallel to the stacking direction of the plurality of single batteries 110. It can be understood that the single battery 110 provided by the embodiments of the present application is a square battery.

[0043] It can be understood that, for the convenience of schematically showing the positions of various structures in the battery module, Figure 1 the thermal pad in

[0044] is not attached to the large surface S1 of the single battery 110. When specifically arranging the heating element 210 and the heat conducting element 220 on both sides of each single battery 110, in order to improve the space utilization rate in the battery module and the structural performance of the heat exchange component 200, the heat conducting element 220 is preferably attached to one large surface S1 of the single battery 110, and the heating element 210 is attached to the other large surface S1 of the same single battery 110. Figures 1 to 3 Please continue to refer to Figure 3 shown in the structure, the first sub-pad 221 is attached to the large surface S1 of the single battery 110, and the second sub-pad 222 is attached to one side surface S2 of the single battery 110 ( Figure 3The second sub-pad 222 is attached to the side S2 at the bottom of the single battery 110. It should be noted that the heat-conducting pad provided in the embodiment of the present application has an L-shaped structure. When the battery module discharges, the heat-conducting pad can quickly conduct the battery heat to the bottom of the battery, keeping the large surface S1 of the battery at a uniform temperature. At this time, by using heat dissipation devices such as auxiliary air cooling or liquid cooling in the battery box, the battery heat can be quickly taken away to achieve a rapid cooling effect. When heating the battery module under low-temperature conditions, after the heat of the heating element 210 is transferred to the single battery 110, the heat of the single battery 110 can be quickly transferred from the top to the bottom through the heat-conducting member 220 to achieve a uniform temperature effect.

[0045] It should be understood that the included angle between the first sub-pad 221 and the second sub-pad 222 can be 90 degrees, or approximately 90 degrees, so as to facilitate the attachment of the first sub-pad 221 and the second sub-pad 222 to the surface of the single battery 110. Of course, the included angle between the first sub-pad 221 and the second sub-pad 222 can also be set to other values according to requirements, which will not be elaborated here.

[0046] In a specific embodiment, as Figure 1 shown, the second sub-pad 222 can be located at the bottom of multiple single batteries 110 within the same battery cell 100. This structural setting can more quickly transfer the heat of the single battery 110 to the bottom of adjacent single batteries 110 or other single batteries 110 to better maintain the uniform temperature of the large surface S1 of the battery.

[0047] In one embodiment, as Figure 2 shown, in the heat-conducting pad, at least the first sub-pad 221 includes two heat-conducting layers 2211 and a buffer layer 2212 provided between the two heat-conducting layers 2211.

[0048] It should be noted that the heat-conducting pad has an extremely high heat-conducting coefficient along the longitudinal direction, has a good uniform temperature effect, and has a relatively high compression performance of the foam along the transverse direction, which can play a good heat preservation and buffering effect.

[0049] Specifically, along the longitudinal direction of the first sub-pad 221, part of the first sub-pad 221 includes the heat-conducting layer 2211 and the buffer layer 2212; or, along the longitudinal direction of the first sub-pad 221, the entire first sub-pad 221 includes the heat-conducting layer 2211 and the buffer layer 2212; or, the entire heat-conducting pad includes the heat-conducting layer 2211 and the buffer layer 2212.

[0050] It is worth noting that when only the first sub-pad 221 is provided with the heat-conducting layer 2211 and the buffer layer 2212, the thickness of the second sub-pad 222 can be set smaller to facilitate saving the longitudinal dimension of the battery module, and thus facilitating the miniaturization setting of the battery module.

[0051] In one embodiment, the heat-conducting layer 2211 is a flexible graphite heat-conducting layer 2211; the buffer layer 2212 is a foam.

[0052] It should be noted that, due to the high thermal conductivity of graphene, not only can the heat conduction rate of the heat-conducting layer 2211 be further improved, but also the heat-conducting layer 2211 can be set very thin. Accordingly, the space occupation and weight of the heat-conducting layer 2211 can be reduced, which is beneficial to the miniaturization and lightweight design of the battery module. At the same time, when the buffer layer 2212 provided in the heat-conducting pad is a foam, it can play a buffering role between the single cells 110 and absorb the expansion force during the charging and discharging of the battery.

[0053] Generally speaking, the heat-conducting pad is a composite material of flexible graphite and foam, which has an ultra-high thermal conductivity in the longitudinal direction, has a good temperature equalization effect, and has a relatively high compression performance of the foam in the transverse direction, and can play a good heat preservation and buffering effect.

[0054] In one embodiment, the edge of the heat-conducting member 220 is coated with an insulating structure.

[0055] It should be noted that by coating the insulating structure on the edge of the heat-conducting member 220, not only can the heat-conducting member 220 be protected to avoid damage to the heat-conducting layer 2211 made of graphene material, but also the insulating protection between the heat-conducting layer 2211 and the single cell 110 can be realized.

[0056] In addition, since only the edge of the heat-conducting member 220 is coated with the insulating structure, the insulating structure can avoid most of the large surface area of the single cell 110, so as to facilitate the heat-conducting member 220 to conduct the heat at the single cell 110. At the same time, this setting form can reduce the space occupation and weight, which is beneficial to the miniaturization and lightweight design of the battery module.

[0057] In a specific embodiment, the insulating structure can be an insulating film. Among them, the volume of the insulating film is small, which can reduce the space occupation and weight, and is beneficial to further realize the miniaturization and lightweight design of the battery module.

[0058] The insulating film can be formed by a separate insulating film material, or the insulating film can be formed by an insulating coating, which will not be elaborated here.

[0059] In one embodiment, as Figure 1 shown, the battery module provided by the embodiment of the present application further includes an insulating layer 300. The insulating layer 300 is arranged at the bottom of the battery unit 100, and the second sub-pad 222 is located between the side surface S2 and the insulating layer 300 and is attached to the insulating layer 300.

[0060] It should be noted that an insulating layer 300 is added to the bottom of the battery cell 100 in the battery module provided in the embodiment of the present application, which can increase the insulation performance of the battery module, and further improve the safety performance of the battery module.

[0061] When specifically arranged, the insulating layer 300 can be formed by an insulating film or an insulating pad. Among them, the insulating film has a small volume, which can reduce the space occupation and weight, and is beneficial to realizing the miniaturization and lightweight design of the battery module. The insulating film can be formed by a single insulating film material, or the insulating film can be formed by an insulating coating, which will not be elaborated herein.

[0062] In one embodiment, the battery module provided in the embodiment of the present application further includes a liquid cooling plate, which is arranged at the bottom of the battery cell 100 to cool the single battery 110 and the heat conducting pad, can quickly take away the heat generated by the single battery 110, keep the average temperature of the large surface S1 of the battery, and further improve the structural performance and safety performance of the battery module.

[0063] In addition, the liquid cooling plate can not only cut off the temperature rise process of the single battery 110, but also inhibit the heat diffusion between adjacent single batteries 110, thereby inhibiting the thermal runaway of the single battery 110 and ensuring the safety of the battery module.

[0064] In a specific embodiment, the liquid cooling plate is arranged on the side of the insulating layer 300 away from the battery cell 100, and the insulation insulates the liquid cooling plate and the single battery to avoid short circuit.

[0065] In one embodiment, the heating element 210 is a heating film to reduce the space occupation and weight of the heating element 210, which is beneficial to realizing the miniaturization and lightweight design of the battery module.

[0066] It should be noted that a heating wire is arranged in the heating film. The heating wire can be connected to a power supply through a wire harness to heat the single battery 110. It should be understood that the power supply can be an external power supply or a single battery as the power supply, which will not be elaborated herein.

[0067] In a second aspect, the embodiment of the present application further provides a battery box. The battery box includes the battery module provided in any technical solution in the first aspect above.

[0068] In the battery box provided by the embodiment of the present application, the battery module can dissipate heat by using the heat conducting member 220 in the structure, so that the internal temperature of the single battery 110 of the battery cell 100 can be quickly transferred to the outside under high temperature or high rate working conditions, facilitating the removal of the heat at the single battery 110 by heat dissipation means such as assisted air cooling or liquid cooling, so that the battery module is in good temperature conditions. At the same time, in the battery box provided by the embodiment of the present application, when the battery module works under low temperature conditions, the heating member 210 can be turned on to heat the single battery 110, so that the temperature at the single battery 110 is evenly distributed to fully exert the battery performance. It should be noted that at this time, after the heat of the heating member 210 is transferred to the single battery 110, it can also be balanced by the heat conducting member 220 to achieve the effect of uniform temperature.

[0069] In a third aspect, the embodiment of the present application further provides an electrical equipment. The electrical equipment includes the battery box provided by any of the technical solutions in the first aspect above.

[0070] In the electrical equipment provided by the embodiment of the present application, the battery module in the battery box can dissipate heat by using the heat conducting member 220 in the structure, so that the internal temperature of the single battery 110 of the battery cell 100 can be quickly transferred to the outside under high temperature or high rate working conditions, facilitating the removal of the heat at the single battery 110 by heat dissipation means such as assisted air cooling or liquid cooling, so that the battery module is in good temperature conditions. At the same time, in the electrical equipment provided by the embodiment of the present application, when the battery module in the battery box works under low temperature conditions, the heating member 210 can be turned on to heat the single battery 110, so that the temperature at the single battery 110 is evenly distributed to fully exert the battery performance. It should be noted that at this time, after the heat of the heating member 210 is transferred to the single battery 110, it can also be balanced by the heat conducting member 220 to achieve the effect of uniform temperature.

[0071] After considering the specification and practicing the present inventive concept disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The description and the example embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0072] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The protection scope of the present disclosure is only limited by the appended claims.

Claims

1. A battery module, characterized in that, Comprising: A battery cell and a heat exchange component, wherein the battery cell includes at least two single cells; the heat exchange component includes a heat conducting member and a heating member, and the heat conducting member and the heating member are disposed on opposite sides of at least one single cell within the battery cell for heat exchange with the single cell.

2. The battery module according to claim 1, wherein The battery cell includes 2N single cells, where N is a positive integer greater than or equal to 1.

3. The battery module according to claim 2, characterized in that, Along the arrangement direction of the plurality of single cells, in the heat exchange components corresponding to the plurality of single cells, the heating members are arranged alternately with each other in sequence.

4. The battery module according to claim 3, wherein, On each of the opposite sides of each single cell, one side is provided with the heat conducting member and the other side is provided with the heating member.

5. The battery module according to any one of claims 1-4, characterized in that, The heat conducting member is a heat conducting pad; the heat conducting pad includes a first sub-pad and a second sub-pad, the second sub-pad connects the first sub-pad and forms an L-shaped structure with the first sub-pad; the single cell includes two large faces arranged oppositely and four side faces for closing the opening between the two large faces and surrounding the large faces, the first sub-pad is attached to the large face of the single cell, and the second sub-pad is attached to one side face of the single cell.

6. The battery module according to claim 5, wherein, In the heat conducting pad, at least the first sub-pad includes two heat conducting layers and a buffer layer disposed between the two heat conducting layers.

7. The battery module according to claim 6, wherein The heat conducting layer is a flexible graphite heat conducting layer; the buffer layer is a foam.

8. The battery module according to claim 5, characterized in that, The edge of the heat conducting pad is coated with an insulating structure.

9. The battery module according to claim 5, wherein, It further includes an insulating layer, the insulating layer is disposed at the bottom of the battery cell, and the second sub-pad is located between the side face and the insulating layer and is attached to the insulating layer.

10. The battery module according to any one of claims 1-4, characterized in that, It further includes a liquid cooling plate, and the liquid cooling plate is disposed at the bottom of the battery cell.

11. The battery module according to any one of claims 1-4, characterized in that, The heating member is a heating film.

12. A battery box, characterized in that, Including the battery module according to any one of claims 1-11.

13. An electrical device, characterized in that, Including the battery box according to claim 12.

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