Battery and electric device

Abstract

The embodiment of the invention provides a battery and an electric device. The performance of the battery can be effectively improved. The battery includes: a plurality of battery cells (20); and the heat conduction part (30) covers at least one surface of each battery monomer (20) in the plurality of battery monomers (20), and the heat conduction part (30) is of a film-shaped structure.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] In the development of battery technology, battery performance is an issue that cannot be ignored. Battery performance not only affects the development and application of battery-related products, but also affects consumers' acceptance of electric vehicles. Therefore, how to improve battery performance is an issue that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application provide a battery and an electrical device, which can effectively improve the performance of the battery.

[0005] In a first aspect, a battery is provided, comprising: a plurality of battery cells; and a heat conductive member covering at least one surface of each of the plurality of battery cells, wherein the heat conductive member is a film-like structure.

[0006] In the embodiment of the present application, by providing a heat conducting member, when the temperature of the battery cell is high, the heat conducting member can conduct the heat of the battery cell, suppress the rise of the temperature of the battery cell, thereby reducing the probability of thermal runaway of the battery and improving the performance of the battery. When the battery cell is at a low temperature, the heat conducting member can transfer the heat to the battery cell, thereby raising the temperature of the battery cell, suppressing the occurrence of abnormal conditions that may be caused by the low temperature of the battery cell to a certain extent, and effectively improving the performance of the battery.

[0007] Furthermore, the heat conductor covers at least one surface of each battery cell, increasing the contact area between the heat conductor and the battery cell, so that the heat conductor can extract the heat from the battery cell faster or transfer the heat to the battery cell faster, which not only improves the performance of the battery more effectively, but also makes the application scenarios of the battery more diverse. For example, the battery of the embodiment of the present application can be used in fast charging scenarios. In addition, the heat conductor is set as a membrane structure. Since the membrane is relatively small in volume and weight, the mass energy density and volume energy density of the battery are effectively improved.

[0008] In some possible embodiments, the thickness of the heat conducting member is less than or equal to 3 mm.

[0009] The above technical solution sets the thickness of the heat conductor to be less than or equal to 3 mm. On the one hand, compared with the traditional battery structure, the thickness of the heat conductor is smaller, thereby reducing the volume and weight of the battery and improving the mass energy density and volume energy density of the battery; on the other hand, more materials can be manufactured to obtain the heat conductor, thereby improving the diversity of the battery.

[0010] In some possible embodiments, the thickness of the heat conducting element ranges from 0.05 mm to 1 mm.

[0011] If the thickness of the heat conductive member is set too small, the thermal conductivity of the heat conductive member may be affected; if the thickness of the heat conductive member is set too large, the effect of reducing the volume and weight of the battery may not be significant. Therefore, the above technical solution sets the thickness of the heat conductive member between 0.05mm-1mm, so that the thermal conductivity of the heat conductive member and the volume and weight of the battery can be compatible at the same time.

[0012] In some possible embodiments, the thickness of the heat conducting member ranges from 0.05 mm to 0.2 mm. In this way, the volume and weight of the battery can be further reduced, thereby improving the mass energy density and volume energy density of the battery.

[0013] In some possible embodiments, the material of the heat conducting element includes graphene.

[0014] Since graphene is not only light in weight but also has high thermal conductivity, the material of the heat conductor in the above technical solution includes graphene. On the one hand, the energy density of the battery is improved; on the other hand, when the temperature of the battery cell is too high, the heat conductor can quickly dissipate the heat of the battery cell, reducing the probability of thermal runaway of the battery; or when the temperature of the battery cell is too low, the heat conductor can quickly transfer the heat to the battery cell, so that the temperature of the battery cell can quickly return to a normal state, thereby greatly improving the performance of the battery.

[0015] In some possible embodiments, the heat conductive member is a flexible heat conductive member.

[0016] The heat conductive member is set as a flexible heat conductive member. In this way, when the battery cell expands due to heat, the heat conductive member can easily absorb the irreversible deformation of the battery cell due to expansion, thereby reducing the probability of the battery emitting high-temperature, flammable, explosive and toxic and harmful substances due to continuous expansion of the battery cell, thereby increasing the service life of the battery.

[0017] In some possible embodiments, the battery cells each have at least three side faces and at least one end face, each of the end faces is connected to all the side faces, and at least one of the end faces is provided with an electrode terminal; wherein the thermal conductive member covers all the side faces of the battery cells and the end faces that are not provided with the electrode terminals.

[0018] In the above technical solution, the heat conductive member covers all surfaces of the battery cell except the end surface provided with the electrode terminal, so that the contact area between the heat conductive member and the battery cell is maximized, so that the rate at which the heat conductive member extracts the heat of the battery cell or transfers the heat to the battery cell is also maximized, which greatly improves the efficiency of the heat conductive member in regulating the temperature of the battery cell.

[0019] In some possible embodiments, the battery further includes: a heat insulating member disposed between two adjacent battery cells among the plurality of battery cells; wherein, when the heat conductive member covers the side surface of the battery cell, the heat conductive member is disposed between the heat insulating member and the battery cell.

[0020] The above technical solution arranges a heat insulating member between two adjacent battery cells. Thus, when the temperature of a battery cell is high, the heat insulating member can prevent the heat generated by the battery cell from diffusing to other battery cells, thereby effectively inhibiting the heat diffusion between the battery cells and further reducing the possibility of thermal runaway of the battery.

[0021] In some possible embodiments, the thickness of the heat insulating member disposed between two adjacent battery cells is 2 mm-3 mm.

[0022] A large number of experiments have proved that setting the thickness of the thermal insulation to 2mm-3mm, on the one hand, enables the thermal insulation to suppress heat diffusion between battery cells, and on the other hand, meets the requirements of battery energy density, that is, a balance is achieved between energy density and suppressing heat diffusion between battery cells.

[0023] In some possible embodiments, the system further includes: a heating element connected to the heat conductive element, and configured to transfer heat to the battery cell through the heat conductive element when the temperature of the battery cell is lower than a temperature threshold, so as to heat the battery cell.

[0024] The above technical solution, when the temperature of the battery cell is low, by providing a heating element to heat the battery cell, the temperature of the battery cell can be raised to its operating temperature, thereby meeting the temperature operating requirements of the battery cell and further improving the performance of the battery.

[0025] In some possible embodiments, the battery further includes: a connector connected to the heat conductive member and a first heat sink, wherein the first heat sink is used to dissipate heat from the heat conductive member through the connector when the heat conductive member dissipates heat from the battery cell.

[0026] After the heat-conducting member has conducted heat from multiple battery cells, it is necessary to dissipate the conducted heat. Therefore, the above technical solution includes a connector for connecting the heat-conducting member and the first heat sink, so that when the temperature of the battery cell is high and the heat-conducting member has conducted the temperature of the battery cell, the first heat sink can receive the heat of the heat-conducting member through the connector, and then dissipate the received heat, thereby achieving the purpose of cooling the battery cell and greatly reducing the probability of thermal runaway.

[0027] In some possible embodiments, the connecting member includes an upper cover plate, a lower cover plate and a metal plate, the upper cover plate and the lower cover plate form a receiving space, and the metal plate is arranged in the receiving space; wherein the metal plate is connected to the heat conductive member and the first heat dissipation member.

[0028] Since the metal plate can conduct heat, the technical solution sets the metal plate so that the heat of the heat-conducting member can be transferred to the first heat sink through the metal plate, thereby achieving the purpose of the first heat sink dissipating the heat of the heat-conducting member. Furthermore, in general, the hardness of metal is relatively high, so the metal plate can also play a certain fixing role.

[0029] In some possible embodiments, the heating element is disposed in the accommodating space.

[0030] The above technical solution arranges the heating element in the accommodation space formed by the upper cover plate and the lower cover plate of the connector, which not only reduces the space occupancy rate of the battery, but also simplifies the implementation and reduces the complexity of the implementation.

[0031] In some possible embodiments, the heating element includes at least two heating elements, wherein some of the heating elements are arranged between the upper cover plate and the metal plate, and the remaining heating elements are arranged between the lower cover plate and the metal plate.

[0032] The above technical solution sets the number of heating elements to be multiple, which effectively increases the heating area and further improves the efficiency of heating the battery cells.

[0033] In some possible embodiments, the heating element includes a heating resistance wire.

[0034] Since the cost of the resistance wire is relatively low, the above technical solution sets the heating element as the heating resistance wire, which can achieve heating of the battery cell at a relatively low cost.

[0035] In some possible embodiments, the battery cell is provided with an electrode terminal, and the battery further includes: a lower box body, in which the battery cell is provided, wherein a heat conductive layer is provided on a side of the lower box body opposite to the electrode terminal, and the heat conductive layer is used to adjust the temperature of the battery cell.

[0036] Since a heat-conducting layer may be provided on the side of the lower box opposite to the electrode terminal in the current battery structure, the above technical solution is also provided in this way, that is, combined with the existing structure of the battery, the modification of the battery is minimized to the greatest extent, and the cost is effectively saved. Furthermore, in addition to the heat-conducting member, the temperature of the battery cell is adjusted in combination with the heat-conducting layer, which can further reduce the probability of battery failure due to abnormal temperature of the battery cell, thereby improving the performance of the battery.

[0037] In a second aspect, an electrical device is provided, comprising the battery of the first aspect or its implementations; and a first heat sink for dissipating heat from the heat conductive element when the heat conductive element dissipates heat from the battery cell.

[0038] In some possible embodiments, the electrical device further includes a gas delivery port and a second heat sink, wherein the gas delivery port is used to deliver gas to the second heat sink, and the second heat sink is used to adjust the temperature of the first heat sink using the gas delivered by the gas delivery port. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0040] In the drawings, the drawings are not drawn to scale.

[0041] Figure 1 A schematic diagram of a vehicle according to an embodiment of the present application.

[0042] Figure 2 This is a schematic diagram of the structure of a battery according to an embodiment of the present application.

[0043] Figure 3 This is an exploded view of a battery cell according to an embodiment of the present application.

[0044] Figure 4 Detailed description of the invention The figure shows an exploded view of a battery according to an embodiment of the present invention.

[0045] Figure 5 It is an exploded view of a battery according to another embodiment of the present application.

[0046] Figure 6 is a cross-sectional view of a battery according to another embodiment of the present application.

[0047] Figure 7 This is an exploded view of a battery according to yet another embodiment of the present application.

[0048] Figure 8 It is a schematic diagram of a connector according to an embodiment of the present application.

[0049] Fig. 9 It is a schematic diagram of a connecting member according to another embodiment of the present application. DETAILED DESCRIPTION

[0050] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0051] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0052] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0054] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0055] With the development of new energy technologies, batteries are being used in more and more fields, such as being used as a power source to power electrical devices and reduce the use of non-renewable resources. During the use of batteries, problems such as collision, overcharging, and short circuit may occur, causing the battery temperature to rise sharply, leading to thermal runaway. During thermal runaway, a series of chemical reactions will occur inside the battery, which may generate a large amount of heat, accompanied by the generation of a lot of flammable gases, which may cause accidents such as fire and explosion.

[0056] In view of this, an embodiment of the present application proposes a battery, which includes a plurality of battery cells and a heat conductor, wherein the heat conductor covers at least one surface of each battery cell in the plurality of battery cells, and the heat conductor is a membrane structure. By providing a heat conductor, when the temperature of the battery cell is high, the heat conductor can export the heat of the battery cell, suppress the rise of the temperature of the battery cell, thereby reducing the probability of thermal runaway of the battery and improving the performance of the battery. When the battery cell is at a low temperature, the heat conductor can transfer heat to the battery cell, thereby increasing the temperature of the battery cell, to a certain extent suppressing the occurrence of abnormal conditions that may be caused by the low temperature of the battery cell, and effectively improving the performance of the battery. Furthermore, the heat conductor covers at least one surface of each battery cell, increasing the contact area between the heat conductor and the battery cell, so that the heat conductor can export the heat of the battery cell faster or transfer the heat to the battery cell faster, which not only more effectively improves the performance of the battery, but also makes the application scenarios of the battery more diversified. For example, the battery of the embodiment of the present application can be applied to fast charging scenarios. In addition, the heat conductor is set as a membrane structure. Since the membrane is relatively small in volume and mass, the mass energy density and volume energy density of the battery are effectively improved.

[0057] The battery of the embodiment of the present application can be applied to, but not limited to, a cell to chassis (CTC).

[0058] The technical solutions described in the embodiments of the present application are applicable to various devices that use batteries, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0059] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0060] For example, Figure 1As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 may be arranged inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 40. For example, a battery 10 may be arranged at the bottom, front or rear of the vehicle 1. The battery 10 may be used to supply power to the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0061] The battery 10 mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery 10 mentioned in the present application may include a battery module or a battery pack. The battery 10 generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0062] In order to meet different power requirements, the battery 10 may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series, in parallel, or in a hybrid connection, wherein the hybrid connection refers to a mixture of series and parallel connections. The battery 10 may also be referred to as a battery pack. Optionally, a plurality of battery cells may be connected in series, in parallel, or in a hybrid connection to form a battery module, and a plurality of battery modules may be connected in series, in parallel, or in a hybrid connection to form the battery 10. In other words, a plurality of battery cells may directly form the battery 10, or may first form a battery module, and then the battery module may form the battery 10.

[0063] For example, Figure 2 As shown in FIG. 1 , it is a schematic diagram of the structure of a battery 10 according to an embodiment of the present application. The battery 10 may include a plurality of battery cells 20. The battery 10 may also include a box (or a cover), the interior of the box is a hollow structure, and the plurality of battery cells 10 are accommodated in the box. Figure 2As shown, the box body may include two parts, which are respectively referred to as the first part 111 and the second part 112, and the first part 111 and the second part 112 are buckled together. The shapes of the first part 111 and the second part 112 may be determined according to the shapes of the combination of multiple battery cells 20, and the first part 111 and the second part 112 may both have an opening. For example, the first part 111 and the second part 112 may both be hollow cuboids and each has only one face as an opening face, the opening of the first part 111 and the opening of the second part 112 are arranged opposite to each other, and the first part 111 and the second part 112 are buckled together to form a box body with a closed chamber. Among them, the box body may include a bottom plate 112a, a side plate 112b and a beam. A plurality of battery cells 20 are connected in parallel or in series or in a mixed combination and are placed in the box body formed by buckling the first part 111 and the second part 112.

[0064] Optionally, the battery 10 may also include other structures, which are not described one by one here. For example, the battery 10 may also include a busbar component, which is used to realize electrical connection between multiple battery cells 20, such as parallel connection, series connection or mixed connection. Specifically, the busbar component can realize electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0065] The number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel or mixed to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand.

[0066] In the embodiment of the present application, the battery cell 20 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiment of the present application. The battery cell 20 may be cylindrical, flat, rectangular or other shapes, etc., which is not limited in the embodiment of the present application. The battery cell 20 is generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which is not limited in the embodiment of the present application.

[0067] like Figure 3, which is a schematic diagram of the structure of a battery cell 20 according to an embodiment of the present application, and the battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form a shell or battery box 21. The wall of the shell 211 and the cover plate 212 are both called the wall of the battery cell 20. The shell 211 is determined according to the shape of one or more electrode assemblies 22 after being combined. For example, the shell 211 can be a hollow cuboid or a cube or a cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or a cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall body so that the inside and outside of the shell 211 are connected. When the shell 211 can be a hollow cylinder, the end face of the shell 211 is an open face, that is, the end face does not have a wall body so that the inside and outside of the shell 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 211 is filled with electrolyte, such as electrolyte solution.

[0068] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is generally in the shape of a flat plate, and the two electrode terminals 214 are fixed on the flat surface of the cover plate 212, and the two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connection member 23, or may also be referred to as a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0069] The electrode assembly 22 is composed of a positive electrode sheet, a negative electrode sheet and a separator. The material of the separator can be polypropylene (PP) or polyethylene (PE), etc. The battery cell 20 mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode collector, the current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer, and the current collector not coated with the positive electrode active material layer serves as the positive electrode ear. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode collector, the current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer, and the current collector not coated with the negative electrode active material layer serves as the negative electrode ear. In order to ensure that a large current is passed without melting, the number of positive electrode ears is multiple and stacked together, and the number of negative electrode ears is multiple and stacked together. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0070] like Figure 3 As shown, each electrode assembly 22 has a first pole tab 221a and a second pole tab 222a. The polarities of the first pole tab 221a and the second pole tab 222a are opposite. For example, when the first pole tab 221a is a positive pole tab, the second pole tab 222a is a negative pole tab. The first pole tab 221a of one or more electrode assemblies 22 is connected to an electrode terminal through a connecting member 23, and the second pole tab 212a of one or more electrode assemblies 22 is connected to another electrode terminal through another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive pole tab through a connecting member 23, and the negative electrode terminal 214b is connected to the negative pole tab through another connecting member 23.

[0071] In the battery cell 20, the electrode assembly 22 can be provided as a single electrode assembly or multiple electrode assemblies according to actual use requirements. Figure 3 As shown, four independent electrode assemblies 22 are disposed in the battery cell 20 .

[0072] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0073] The pressure relief mechanism 213 may be any possible pressure relief structure, which is not limited in the embodiments of the present application. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0074] Figure 4 FIG. 1 is a schematic diagram of a battery 10 according to an embodiment of the present application. Figure 4 As shown, the battery 10 may include a plurality of battery cells 20 and a heat conductive member 30. The heat conductive member 30 covers at least one surface of each battery cell 20 in the plurality of battery cells 20, and the heat conductive member 30 is a film-like structure.

[0075] The heat conducting member 30 may be used to adjust the temperature of the battery cell 20 .

[0076] Therefore, in the embodiment of the present application, by providing the heat conducting member 30, when the temperature of the battery cell 20 is high, the heat conducting member 30 can conduct the heat of the battery cell 20, suppressing the rise of the temperature of the battery cell 20, thereby reducing the probability of thermal runaway of the battery 10 and improving the performance of the battery 10. When the battery cell 20 is at a low temperature, the heat conducting member 30 can transfer heat to the battery cell 20, thereby increasing the temperature of the battery cell 20, suppressing the occurrence of abnormal conditions that may be caused by the low temperature of the battery cell 20 to a certain extent, and effectively improving the performance of the battery 10.

[0077] Furthermore, the heat conductor 30 covers at least one surface of each battery cell 20, increasing the contact area between the heat conductor 30 and the battery cell 20, so that the heat conductor 30 can extract heat from the battery cell 20 faster or transfer heat to the battery cell 20 faster, which not only more effectively improves the performance of the battery 10, but also makes the application scenarios of the battery 10 more diversified. For example, the battery 10 of the embodiment of the present application can be used in fast charging scenarios.

[0078] In addition, the heat conductor 30 is configured as a membrane structure. Since the membrane is relatively small in volume and mass, the mass energy density and volume energy density of the battery 10 are effectively improved.

[0079] To improve the thermal conductivity of the heat conductor 30, the heat conductor 30 may cover multiple surfaces of the battery cell 20. Each battery cell 20 has at least three side surfaces and at least one end surface, each end surface is connected to all side surfaces, and at least one of the end surfaces is provided with an electrode terminal 214.

[0080] In some embodiments, the thermal conductor 30 may cover all sides of the battery cell 20 .

[0081] Alternatively, the heat conducting member 30 may cover all side surfaces of the battery cell 20 and the end surface where the electrode terminal 214 is not provided. Figure 4 As shown, the battery cell has four side faces and two end faces, and the heat conductive member 30 covers five faces of the battery cell 20 , which are faces other than the faces on which the electrode terminals are disposed.

[0082] In the above technical solution, the heat conductive member covers all surfaces of the battery cell except the end surface provided with the electrode terminal, so that the contact area between the heat conductive member and the battery cell is maximized, so that the rate at which the heat conductive member extracts the heat of the battery cell or transfers the heat to the battery cell is also maximized, which greatly improves the efficiency of the heat conductive member in regulating the temperature of the battery cell.

[0083] The heat conductive member 30 may cover multiple surfaces of each battery cell 20, or may cover multiple surfaces of at least some of the battery cells 20. For example, the battery 10 includes three battery cells, namely, battery cell a, battery cell b, and battery cell c. The heat conductive member 30 may cover multiple surfaces of battery cell a, multiple surfaces of battery cell b, and one surface of battery cell c.

[0084] In the case where the heat conductive member 30 covers multiple surfaces of the battery cell 20, the number of surfaces of the battery cell 20 covered by the heat conductive member 30 may be the same or different for different battery cells 20, and the embodiments of the present application do not specifically limit this. Still using the above example to illustrate, the heat conductive member 30 may cover two surfaces of the battery cell a and five surfaces of the battery cell b. If the heat conductive member 30 covers two surfaces of both the battery cell a and the battery cell b, the surfaces of the battery cell a and the battery cell b covered by the heat conductive member 30 may both be side surfaces, or, it may cover one end surface and one side surface of the battery cell a and cover two side surfaces of the battery cell b.

[0085] Optionally, the heat conducting member 30 may be a heat conducting film. In other words, the heat conducting member 30 is only composed of a film.

[0086] Alternatively, the heat conducting member 30 may be composed of a film and a metal. For example, the heat conducting member 30 may be obtained by plating a metal on the surface of the film.

[0087] Optionally, the heat conductive member 30 may cover the entirety of at least one surface of the battery cell 20, or may cover a portion of at least one surface of the battery cell 20. For example, if the heat conductive member 30 covers the side surface of the battery cell 20, the area of ​​the surface where the heat conductive member 30 contacts the side surface may be the same as the area of ​​the side surface of the battery cell 20, or may be smaller than the area of ​​the side surface of the battery cell 20.

[0088] In order to achieve effective heat conduction, the thermal conductive member 30 can be coated with at least one surface of the battery cell 20 by, but not limited to, thermal conductive silicone, so that the thermal conductive silicone can transfer the heat of the battery cell 20 to the thermal conductive member 30, thereby enhancing the thermal conduction effect of the thermal conductive member 30.

[0089] In some embodiments, the material of the heat conductor 30 may include graphene. For example, the heat conductor 30 may be made of graphene alone, or may be made of a composite material with graphene as the main material.

[0090] Since graphene is not only light in weight but also has high thermal conductivity, the material of the heat conductor 30 in the above technical solution includes graphene. On the one hand, the energy density of the battery 10 is improved; on the other hand, when the temperature of the battery cell 20 is too high, the heat conductor 30 can quickly dissipate the heat of the battery cell 20, reducing the probability of thermal runaway of the battery 10; or when the temperature of the battery cell 20 is too low, the heat conductor 30 can quickly transfer the heat to the battery cell 20, so that the temperature of the battery cell 20 can quickly return to a normal state, thereby greatly improving the performance of the battery 10.

[0091] In addition to graphene, the material of the heat conductor 30 may include graphite. For example, the heat conductor 30 may be made of graphite alone, or may be made of a composite material with graphite as the main material.

[0092] In addition, the material of the heat conducting member 30 may also include heat conducting metal. The heat conducting member 30 may be, for example, a metal film composited with elements such as copper, aluminum, and iron. Of course, the material of the heat conducting member 30 may include graphene and heat conducting metal at the same time.

[0093] Since the heat conducting member 30 is a film-like structure, the thickness of the heat conducting member 30 in the embodiment of the present application can be relatively small. For example, the thickness of the heat conducting member 30 can be less than or equal to 5 mm. For example, the thickness of the heat conducting member can be 4 mm, 3.5 mm, etc., or can be micrometer-level or nanometer-level.

[0094] Furthermore, the thickness of the heat conducting member 30 may be less than or equal to 3 mm. For example, the thickness of the heat conducting member may be 2.5 mm, 2 mm, 1.5 mm, 0.03 mm, 0.01 mm, etc.

[0095] In the above technical solution, the thickness of the heat conductor 30 is set to be less than or equal to 3 mm. On the one hand, compared with the traditional battery structure, the thickness of the heat conductor 30 is smaller, thereby reducing the volume and weight of the battery 10 and improving the mass energy density and volume energy density of the battery 10; on the other hand, more materials can be manufactured to obtain the heat conductor 30, thereby improving the diversity of the battery 10.

[0096] If the thickness of the heat conductive member 30 is set too small, the heat conductive performance of the heat conductive member 30 may be affected. For example, when the battery cell 20 has thermal runaway, the heat conductive member 30 may not be able to promptly conduct the heat of the battery cell 20. If the thickness of the heat conductive member 30 is set too large, the volume and weight of the battery 10 will be affected, so that the effect of improving the mass energy density and volume energy density of the battery 10 may not be significant.

[0097] Based on the above considerations, the thickness of the heat conductive member 30 may be in the range of 0.05 mm to 1 mm. For example, the thickness of the heat conductive member 30 may be 0.3 mm, 0.5 mm, 0.8 mm, etc. In this way, multiple factors can be compatible at the same time, such as the thermal conductivity of the heat conductive member 30, the volume and weight of the battery 10, etc., thereby greatly improving the performance of the battery 10.

[0098] Considering that some materials (e.g., graphene) have better performance when the thickness is between 0.05 mm and 0.2 mm, in some embodiments, the thickness of the heat conducting member 30 ranges from 0.05 mm to 0.2 mm. For example, the thickness of the heat conducting member 30 can be 0.06 mm, 0.08 mm, 0.1 mm, etc.

[0099] This technical solution, on the one hand, can make the performance of some materials in a better state, thereby improving the performance of the heat conductor 30; on the other hand, it further reduces the volume and weight of the battery, thereby effectively improving the mass energy density and volume energy density of the battery.

[0100] Optionally, in some embodiments, the heat conductive member 30 may be a flexible heat conductive member.

[0101] The heat conductive member 30 is configured as a flexible heat conductive member. Thus, when the battery cell 20 expands due to heat, the heat conductive member 30 can easily absorb the irreversible deformation of the battery cell 20 due to the expansion, thereby reducing the probability of the battery 10 emitting high-temperature, flammable, explosive, and toxic and harmful substances due to the continuous expansion of the battery cell 20, thereby increasing the service life of the battery 10.

[0102] Considering that heat diffusion may occur between the plurality of battery cells 20, Figure 5 and Figure 6 As shown, the battery 10 of the embodiment of the present application may further include a heat insulating member 40. The heat insulating member 40 is disposed between two adjacent battery cells 20 among the plurality of battery cells 20, wherein the heat conductive member 20 covers the side of the battery cell 20, and the heat conductive member 30 is disposed between the heat insulating member 40 and the battery cell 20.

[0103] The material of the heat insulating member 40 may include silicon powder, such as silicon dioxide, or may include glass fiber.

[0104] The above technical solution arranges a heat insulating member 40 between two adjacent battery cells 20. Thus, when the temperature of a battery cell 20 is high, the heat insulating member 40 can prevent the heat generated by the battery cell 20 from diffusing to other battery cells 20, thereby effectively inhibiting the heat diffusion between the battery cells 20 and further reducing the possibility of thermal runaway of the battery 10.

[0105] Generally, if the thickness of the thermal insulation 40 is small, the effect of the thermal insulation 40 in preventing heat diffusion between the battery cells 20 may not be good; if the thickness of the thermal insulation 40 is large, it may increase the volume and weight of the battery, thereby reducing the energy density of the battery 10.

[0106] Therefore, considering various factors, in the embodiment of the present application, the thickness of the heat insulating member 40 disposed between two adjacent battery cells 20 may be 2 mm to 3 mm.

[0107] A large number of experiments have proved that setting the thickness of the thermal insulation 40 to 2mm-3mm, on the one hand, enables the thermal insulation 40 to suppress the heat diffusion between the battery cells 20, and on the other hand, meets the energy density requirement of the battery 10, that is, a balance is achieved between energy density and suppressing heat diffusion between the battery cells 20.

[0108] Generally, after the heat conducting member 30 conducts heat from the multiple battery cells 20, it is necessary to dissipate the conducted heat. Therefore, the electrical device of the embodiment of the present application may further include a first heat dissipating member, which is used to dissipate heat from the heat conducting member 30 when the heat conducting member 30 conducts heat from the multiple battery cells 20.

[0109] Optionally, the first heat sink may be disposed at the head of the electrical device, such as the front of the vehicle 1 .

[0110] Optionally, the first heat sink may be arranged around the battery 10 .

[0111] During the driving of the electric device, the first heat sink can use the airflow generated by the electric device to remove the heat received from the heat conductor 30 , thereby dissipating the heat from the heat conductor 30 and further cooling the battery cell 20 .

[0112] In addition to being in a driving state, the electric device can also be in a stationary state. At this time, the electric device generates almost no airflow, resulting in the first heat sink being unable to dissipate the heat transferred from the heat conductor 30 through the connecting member. Considering this problem, the electric device may further include a gas delivery port and a second heat sink. The gas delivery port may be used to deliver gas to the second heat sink, and the second heat sink may be used to adjust the temperature of the first heat sink using the gas delivered by the gas delivery port.

[0113] Optionally, the gas delivery port may be disposed at, but not limited to, the head position of the electrical device.

[0114] The gas delivery port can be always in an open state, or the gas delivery port can be in a closed state when not in operation, and can be switched from a closed state to an open state when it is needed to deliver gas to the inside of the electrical device. For example, a control unit of the electrical device, such as a battery management system (BMS), can control the opening and closing of the gas delivery port.

[0115] Optionally, the second heat sink may include a fan. Of course, the second heat sink may also be other structures, which is not limited in the embodiments of the present application. Similar to the gas transmission port, the control unit of the electrical device can control the opening and closing of the second heat sink. When it is necessary to adjust the temperature of the first heat sink, the control unit can turn on the second heat sink to cool the first heat sink. When the temperature of the battery cell 20 is reduced to a normal temperature (such as ambient temperature), the control unit can turn off the second heat sink.

[0116] like Figure 7 As shown, the battery 10 may further include a connector 60 connected to the heat conductor 30 and a first heat sink, the first heat sink being used to dissipate heat from the heat conductor 30 through the connector 60 when the heat conductor 30 dissipates heat from a plurality of battery cells 20 .

[0117] It should be noted that the embodiment of the present application does not specifically limit the name of the connector 60, and it may also be other names, such as a heat transfer connector or a heat transfer adapter plate.

[0118] After the heat-conducting member 30 has conducted heat from the multiple battery cells 20, it is also necessary to dissipate the conducted heat. Therefore, the above technical solution includes a connector 60 for connecting the heat-conducting member 30 and the first heat sink, so that when the temperature of the battery cell 20 is high and the heat-conducting member 30 has conducted the temperature of the battery cell 20, the first heat sink can receive the heat of the heat-conducting member 30 through the connector 60, that is, the connector 60 plays a role of heat conduction, and then dissipates the received heat, thereby achieving the purpose of cooling the battery cell 20 and greatly reducing the probability of thermal runaway.

[0119] Optionally, the connecting member 60 may be adhered together with the first heat sink and the heat conductor 30 by means of thermally conductive glue or other adhesives.

[0120] Optionally, the connector 60 may be in a form similar to, but not limited to, a male connector and a female connector, and connected to the heat conducting member 30 and the first heat dissipating member.

[0121] Figure 8 A schematic diagram of the connector 60 is shown. Figure 8As shown, the connector 60 may include an upper cover plate 61, a lower cover plate 62 and a metal plate 63, wherein the upper cover plate 61 and the lower cover plate 62 may form a receiving space, and the metal plate 63 is disposed in the receiving space. The metal plate 63 may be connected to the heat conducting member 30 and the first heat dissipating member.

[0122] Exemplarily, the material of the metal plate 63 may be one or more of copper, aluminum, nickel, iron, and alloys thereof.

[0123] Since the metal plate 63 can conduct heat, the technical solution can transfer the heat of the heat-conducting member 30 to the first heat sink through the metal plate 63 by setting the metal plate 63, thereby achieving the purpose of the first heat sink dissipating the heat of the heat-conducting member 30. Furthermore, in general, the hardness of metal is relatively high, so the metal plate 63 can also play a certain fixing role.

[0124] As mentioned above, in addition to the possibility of thermal runaway of the battery cell 20, its temperature may also be lower than the normal operating temperature of the battery cell 20, making the battery 10 unable to be used normally. Therefore, the battery 10 of the embodiment of the present application may also include a heating element 50, which is connected to the heat conductive element 30, and is used to transfer heat to the at least one battery cell 20 through the heat conductive element 30 when the temperature of at least one battery cell 20 among the multiple battery cells 20 is lower than the temperature threshold, so as to heat the at least one battery cell 20.

[0125] Specifically, the control unit of the electric device, such as a BMS, can monitor the temperature of the battery cell 20. When it is detected that the temperature of the battery cell 20 is lower than the temperature threshold, the heating element 50 can be controlled to heat up, so that the heating element 50 transfers heat to the battery cell 20 through the heat conducting element 30, thereby heating the battery cell 20.

[0126] The above technical solution, when the temperature of the battery cell 20 is low, provides a heating element 50 for heating the battery cell 20 so that the temperature of the battery cell 20 can be raised to its operating temperature, thereby meeting the temperature operating requirements of the battery cell 20 and further improving the performance of the battery 10.

[0127] Optionally, the heating element 50 may be attached to the heat conducting element 30. For example, the heating element 50 may be attached to the heat conducting element 30 by welding or by using a heat conducting adhesive.

[0128] Alternatively, if Fig. 9 As shown, the heating element 50 can be disposed in the connecting element 60. For example, the heating element 50 can be disposed in a receiving space formed by an upper cover plate 61 and a lower cover plate 62 of the connecting element 60.

[0129] Disposing the heating element 50 in the accommodation space formed by the upper cover plate 61 and the lower cover plate 62 of the connecting element 60 not only reduces the space occupation rate of the battery 10 but also simplifies the implementation and reduces the implementation complexity.

[0130] The number of the heating element 50 may be one.

[0131] Alternatively, the number of the heating elements 50 may be multiple. For example, the number of the heating elements 50 is two. Fig. 9 , wherein part of the heating element 50 is arranged between the upper cover plate 61 and the metal plate 63 , and the remaining part of the heating element 50 is arranged between the lower cover plate 62 and the metal plate 63 .

[0132] The parameters such as shape and size of the plurality of heating elements 50 may be the same or different.

[0133] In the above technical solution, the number of the heating elements 50 is set to be multiple, which effectively increases the heating area and further improves the efficiency of heating the battery cell 20 .

[0134] As an example, the heating element 50 may be a heating generator.

[0135] As another example, the heating element 50 may include a heating resistor wire. Since the cost of the resistor wire is relatively low, the heating element 50 is configured as a heating resistor wire, so that the battery cell 20 can be heated at a relatively low cost.

[0136] It should be understood that in addition to the above description, the heating element 50 can also heat the battery cell 20 by infrared heating, electromagnetic heating, etc.

[0137] In addition to the above structure, the battery 10 also includes Figure 4-Figure 7 As shown, a lower box 711 may also be included, and multiple battery cells 20 are arranged in the lower box 711. A heat conductive layer (not shown in the figure) is arranged on one side of the lower box 711 opposite to the electrode terminal 214, and the heat conductive layer is used to adjust the temperature of the multiple battery cells 20.

[0138] Optionally, the heat-conducting layer may include but is not limited to a fluid. The fluid may be specifically water, a mixture of water and ethylene glycol, or air, etc. The fluid may be circulated to achieve a better cooling effect.

[0139] Since in the current battery structure, a heat-conducting layer may be provided on the side of the lower box 711 opposite to the electrode terminal 214, the above technical solution is also provided in this way, that is, combined with the existing structure of the battery, the modification of the battery is minimized to the greatest extent, and the cost is effectively saved. Furthermore, in addition to the heat-conducting member 30, the temperature of the battery cell 20 is adjusted in combination with the heat-conducting layer, which can further reduce the probability of failure of the battery 10 due to abnormal temperature of the battery cell 20, thereby improving the performance of the battery 10.

[0140] In addition to the structures mentioned above, refer again Figure 4-Figure 7 The battery 10 may further include an upper cover 712. The upper cover 712 covers the lower box body 711 to form a box body with a closed chamber, and the battery cell 20 is disposed in the box body.

[0141] Combine the following Figure 7 A specific structure of the battery 10 according to the embodiment of the present application is described. Figure 7 The battery 10 may include a plurality of battery cells 20, a heat conducting member 30, a heat insulating member 40, a heating member 50, a connecting member 60 and a lower box 711. The heat conducting member 30 is a heat conducting film and a flexible heat conducting film, the heating member 50 is a heating resistor wire, the first heat dissipating member is a radiator, and the second heat dissipating member is a fan.

[0142] The thermally conductive film covers the other five surfaces of the battery cell 20 except the end surface provided with the electrode terminal, the thermal insulator 40 is arranged between two adjacent battery cells 20 , and the thermally conductive film is arranged between the thermal insulator 40 and the battery cell 20 .

[0143] The connector 60 is connected to the thermally conductive film and the radiator to achieve the purpose of connecting the thermally conductive film to the radiator. When the temperature of the battery cell 20 is high and the electric device is in a driving state, the thermally conductive film removes the heat of the battery cell 20, and the radiator receives the heat of the thermally conductive film through the connector 60, and uses the airflow generated during the driving of the electric device to dissipate the received heat, so as to achieve the purpose of air cooling the battery cell 20. When the temperature of the battery cell 20 is high and the electric device is stationary, the electric device starts the fan to cool the heat of the radiator.

[0144] The heating resistor is connected to the thermally conductive film. When the temperature of the battery cell 20 is lower than the temperature threshold, the BMS of the electrical device can control the heating resistor to heat the battery cell 20. The heat of the heating resistor can be transferred to the battery cell 20 through the thermally conductive film, thereby achieving the purpose of heating the battery cell.

[0145] The connecting member 60 includes an upper cover plate 61, a lower cover plate 62 and a metal plate 63. The upper cover plate 61 and the lower cover plate 62 form a receiving space, and the metal plate 63 is arranged in the receiving space. There are two heating resistance wires, one of which is arranged between the upper cover plate 61 and the metal plate 63, and the other heating resistance wire is arranged between the lower cover plate 62 and the metal plate 63.

[0146] The battery cell 20 is disposed in the lower case 711 of the battery 10 , and a heat-conducting layer is disposed on one side of the lower case 711 opposite to the electrode terminal to further cool the battery cell.

[0147] The present application also provides an electrical device, which may include the battery 10 and a first heat sink in the above embodiment. The first heat sink may be used to dissipate heat from the heat conductive member 30 when the heat conductive member 30 dissipates heat from multiple battery cells.

[0148] Furthermore, the electrical device may further include a gas delivery port and a second heat sink, wherein the gas delivery port is used to deliver gas to the second heat sink, and the second heat sink is used to adjust the temperature of the first heat sink using the gas delivered by the gas delivery port.

[0149] It should be noted that the first heat sink, the gas delivery port and the second heat sink can refer to the relevant descriptions in the aforementioned embodiments, and for the sake of brevity, they will not be repeated here.

[0150] In some embodiments, the electrical device may be Figure 1 Vehicle 1, ship or spacecraft.

[0151] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery (10), characterized in that: include: A plurality of battery cells (20); A heat conductive member (30) covers at least one surface of each battery cell (20) among the plurality of battery cells (20), and the heat conductive member (30) is a film-like structure.

2. The battery (10) according to claim 1, characterized in that: The thickness of the heat conducting member (30) is less than or equal to 3 mm.

3. The battery (10) according to claim 2, characterized in that The thickness of the heat conducting member (30) ranges from 0.05 mm to 1 mm.

4. The battery (10) according to claim 3, characterized in that The thickness of the heat conducting member (30) ranges from 0.05 mm to 0.2 mm.

5. The battery (10) according to any one of claims 1 to 4, characterized in that: The material of the heat conducting member (30) includes graphene.

6. The battery (10) according to any one of claims 1 to 5, characterized in that The heat conducting member (30) is a flexible heat conducting member.

7. The battery (10) according to any one of claims 1 to 6, characterized in that The battery cells (20) each have at least three side faces and at least one end face, each of the end faces is connected to all of the side faces, and at least one of the end faces is provided with an electrode terminal (214); The heat conducting member (30) covers all the side surfaces of the battery cell (20) and the end surface not provided with the electrode terminal (214).

8. The battery (10) according to claim 7, characterized in that The battery (10) further comprises: a heat insulating member (40) disposed between two adjacent battery cells (20) among the plurality of battery cells (20); Wherein, when the heat conducting member (30) covers the side surface of the battery cell (20), the heat conducting member (30) is arranged between the heat insulating member (40) and the battery cell (20).

9. The battery (10) according to claim 8, characterized in that The thickness of the heat insulating member (40) disposed between two adjacent battery cells (20) is 2 mm to 3 mm.

10. The battery (10) according to any one of claims 1 to 9, characterized in that The battery (10) further comprises: A heating element (50) is connected to the heat conducting element (30) and is used to transfer heat to the battery cell (20) through the heat conducting element (30) when the temperature of the battery cell (20) is lower than a temperature threshold, so as to heat the battery cell (20).

11. The battery (10) according to claim 10, characterized in that The battery (10) further comprises: A connecting member (60) is connected to the heat-conducting member (30) and a first heat-dissipating member, wherein the first heat-dissipating member is used to dissipate heat from the heat-conducting member (30) through the connecting member (60) when the heat-conducting member (30) dissipates heat from the battery cell (20).

12. The battery (10) according to claim 11, characterized in that The connecting member (60) comprises an upper cover plate (61), a lower cover plate (62) and a metal plate (63), wherein the upper cover plate (61) and the lower cover plate (62) form a receiving space, and the metal plate (63) is arranged in the receiving space; Wherein, the metal plate (63) is connected to the heat conducting element (30) and the first heat dissipating element.

13. The battery (10) according to claim 12, characterized in that The heating element (50) is arranged in the accommodating space.

14. The battery (10) according to claim 13, characterized in that The heating element (50) comprises at least two heating elements (50), wherein part of the heating element (50) is arranged between the upper cover plate (61) and the metal plate (63), and the remaining part of the heating element (50) is arranged between the lower cover plate (62) and the metal plate (63).

15. The battery (10) according to any one of claims 10 to 14, characterized in that The heating element (50) comprises a heating resistance wire.

16. The battery (10) according to any one of claims 1 to 15, characterized in that The battery cell (20) is provided with an electrode terminal (214), and the battery (10) further comprises: A lower box (711), wherein the battery cell (20) is arranged in the lower box (711), wherein a heat-conducting layer is arranged on a side of the lower box (711) opposite to the electrode terminal (214), and the heat-conducting layer is used to adjust the temperature of the battery cell (20).

17. An electrical device, characterized in that: include: The battery (10) according to any one of claims 1 to 16; The first heat sink is used to dissipate heat from the heat conductive member (30) when the heat conductive member (30) dissipates heat from the battery cell (20).

18. The electrical device according to claim 17, characterized in that: The electrical device further comprises a gas delivery port and a second heat sink, wherein the gas delivery port is used to deliver gas to the second heat sink, and the second heat sink is used to adjust the temperature of the first heat sink by using the gas delivered by the gas delivery port.

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