Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body and a heat balance part, wherein the box body comprises a box wall; at least one box wall of the box body is of a hollow structure so that a first containing space can be formed in the box wall, the heat balancing piece is located in the first containing space and abuts against the box wall, a second containing space is formed in the heat balancing piece, the heat balancing piece comprises a phase change material, and the phase change material is arranged in the second containing space. According to the battery device, the heat balancing piece is arranged in the box wall of the box body, the heat balancing piece comprises the phase change material, and when the temperature in the box body is too high, the heat balancing piece can absorb heat and store heat and release the stored heat when the temperature in the box body is too low, so that the stability of the temperature of the battery device can be maintained, the heat preservation and storage effects of the box body are improved, and energy is saved.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a battery device and an electrical device using the same. Background Art

[0002] A battery device includes a box body and battery cells located inside the box body. In related technologies, a battery device has been proposed. In the related technologies, the box body has poor heat preservation and heat storage effects, and the heat generated inside the box body will be conducted to the environment through the box body, resulting in energy waste. Summary of the Utility Model

[0003] In view of the above problems, this application provides a battery device and an electrical device using the same. The battery device is provided with a heat equalizing member, which can reduce the heat conduction from the inside of the box body to the environment, reduce energy waste, and maintain the temperature stability of the battery device.

[0004] To solve the above technical problems, a technical solution adopted in this application is to provide a battery device. The battery device includes a box body and a heat equalizing member. The box body includes a box wall; at least one of the box walls of the box body is a hollow structure to form a first accommodation space inside the box wall. The heat equalizing member is located in the first accommodation space and abuts against the box wall. The heat equalizing member forms a second accommodation space, and the heat equalizing member includes a phase change material, and the phase change material is disposed in the second accommodation space.

[0005] As described above, there is a heat equalizing member inside the box wall of the box body. The heat equalizing member includes a phase change material. When the temperature inside the box body is too high, the heat equalizing member can absorb heat for heat storage, and release the stored heat when the temperature inside the box body is too low, so as to maintain the temperature stability of the battery device, improve the heat preservation and heat storage effects of the box body, and save energy.

[0006] In a possible implementation manner, the box wall includes a bottom plate, side plates and a box cover. The bottom plate and the box cover are oppositely arranged, and the side plates connect the bottom plate and the box cover. Among them, the box cover is the hollow structure, and the heat equalizing member is located in the first accommodation space inside the box cover.

[0007] As described above, the heat equalizing member is arranged inside the box cover, which can improve the heat preservation and heat storage effects of the box body and save energy.

[0008] In a possible implementation manner, the heat equalizing member further includes a hollow structure body. The hollow structure body is disposed in the first accommodation space, and its outer wall abuts against the box cover to form the inner wall of the first accommodation space. The inside of the hollow structure body forms the second accommodation space.

[0009] As described above, the phase change material is specifically arranged inside the hollow structure. The phase change material has the characteristic of unchanged heat absorption and heat release properties, enabling the box cover to have heat preservation and heat storage effects.

[0010] In a possible implementation manner, a partition is provided in the first accommodation space. The partition divides the first accommodation space into several accommodation parts, and each accommodation part is provided with the hollow structure, so that the phase change material is evenly distributed in the first accommodation space.

[0011] As described above, it can make the phase change material evenly distributed in the first accommodation space, improving the heat preservation and heat storage effects of the box cover.

[0012] In a possible implementation manner, the box cover includes an upper cover and a lower cover. The upper cover and the lower cover are arranged opposite to each other. The plate edge of the upper cover is connected to the plate edge of the lower cover, and they jointly define the first accommodation space.

[0013] As described above, the box cover can have a first accommodation space to accommodate the hollow structure.

[0014] In a possible implementation manner, the box cover is a non-metallic upper cover, the bottom plate is a metal bottom plate, and the side plate is a metal side plate.

[0015] As described above, the box cover is a non-metallic upper cover with a low thermal conductivity, which is beneficial to the heat preservation of the box body. The bottom plate and the side plate are made of metal materials, having high strength, and can improve the impact resistance and strength of the box body.

[0016] In a possible implementation manner, the box cover is any one of a carbon fiber composite box cover, a glass fiber composite box cover, and a thermoplastic composite box cover.

[0017] The box cover of the above materials has high strength and also has a low thermal conductivity.

[0018] In a possible implementation manner, the size of the second accommodation space is larger than the volume of the phase change material in the second accommodation space.

[0019] As described above, the phase change material does not fill the second accommodation space, which can reserve a volume expansion space for the phase change of the phase change material.

[0020] In a possible implementation manner, the hollow structure is a metal hollow structure.

[0021] The metal has a high thermal conductivity, which can improve the heat exchange efficiency of the phase change material.

[0022] In a possible implementation manner, the hollow structure is an aluminum hollow structure.

[0023] As described above, aluminum has a relatively high thermal conductivity.

[0024] In a possible implementation, the hollow structure is spherical.

[0025] The above-mentioned spherical hollow structure is convenient for production.

[0026] In a possible implementation, the phase change temperature of the phase change material is between 50 °C and 70 °C.

[0027] The phase change material with the above-mentioned phase change temperature can maintain the stability of the temperature of the battery device.

[0028] In a possible implementation, the phase change material is one of paraffin, myristic acid, and palmitic acid.

[0029] The phase change material of the above type can maintain the stability of the temperature of the battery device.

[0030] To solve the above technical problems, another technical solution adopted by this application is to provide an electrical device, which includes a battery device, the battery device is the above-mentioned battery device, and the battery device is used to provide electrical energy.

[0031] In the above-mentioned electrical device, a heat balance component is provided inside the box wall of the box body. When the temperature inside the box body is too high, the heat balance component can absorb heat, store heat, and release the stored heat when the temperature inside the box body is too low, so as to maintain the stability of the temperature of the battery device, improve the heat preservation and heat storage effects of the box body, and save energy.

[0032] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above content, other purposes, features, and advantages of this application more obvious and understandable, the specific implementation manners of this application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of a vehicle according to one or more embodiments of this application;

[0035] Figure 2 It is a schematic structural diagram of a battery cell according to one or more embodiments of this application;

[0036] Figure 3 It is a schematic internal structural diagram of a box cover according to one or more embodiments of this application;

[0037] Figure 4 Structural schematic diagram of a thermal equalizing member according to one or more embodiments of the present application;

[0038] Figure 5 Internal structural schematic diagram of a box cover according to another or other embodiments of the present application.

[0039] Among them, 1000, vehicle; 200, controller; 300, motor; 100, battery device; 110, battery cell; 10, box cover; 11, upper cover; 12, lower cover; 20, thermal equalizing member; 21, hollow structure; 22, phase change material; 23, second accommodation space; 30, first accommodation space; 40, box wall. Detailed implementation manners

[0040] The embodiments of the technical solution of the present application will be described in detail below. The following embodiments are only used to illustrate the technical solution of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, unless otherwise specifically defined, the term "plurality" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0043] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is merely a relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0045] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying 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 to the embodiments of the present application.

[0046] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may also be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0047] Currently, from the perspective of the development of the market situation, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric transportation tools such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. With the continuous expansion of the application fields of batteries, the market demand is also continuously increasing.

[0048] Among them, the battery device includes a box body and battery cells located inside the box body. The related art proposes a battery device. In the related art, the box body has poor heat insulation and heat storage effects, and the heat generated inside the box body will be conducted to the environment through the box body, resulting in energy waste.

[0049] Based on the above considerations, in order to solve the technical problems in the prior art that the box body has poor heat insulation and heat storage effects, and the heat generated inside the box body will be conducted to the environment through the box body, resulting in energy waste, the present application proposes a battery device and an electrical device. The battery device is provided with a heat balance component, which can reduce the heat conduction from the inside of the box body to the environment, reduce energy waste, and maintain the temperature stability of the battery device.

[0050] For the convenience of description, in the following embodiments, a power-consuming device in an embodiment of the present application is taken as an example of a vehicle for description.

[0051] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

[0052] The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 can be disposed at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0053] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0054] To improve the performance of the power-consuming device, the present application provides a battery device and a power-consuming device. Please refer to Figures 3 to 5 , Figure 3 which is a schematic internal structure diagram of a box cover according to one or more embodiments of the present application; Figure 4 which is a schematic structural diagram of a thermal equilibrium member according to one or more embodiments of the present application; Figure 5 which is a schematic internal structure diagram of a box cover according to another or other embodiments of the present application.

[0055] In some embodiments, the battery device 100 includes a box body (not shown) and a thermal equilibrium member 20. The box body includes a box wall 40; at least one box wall 40 of the box body is a hollow structure to form a first accommodation space 30 inside the box wall 40. The thermal equilibrium member 20 is located in the first accommodation space 30 and abuts against the box wall 40. The thermal equilibrium member 20 forms a second accommodation space 23. The thermal equilibrium member 20 includes a phase change material 22, and the phase change material 22 is disposed in the second accommodation space 23.

[0056] The box body has an accommodation cavity (not shown). The battery device 100 further includes one or more battery cells 110. Please refer to Figure 2 , Figure 2Schematic diagram of the structure of a battery cell according to one or more embodiments of the present application. The battery cell 110 is located in the accommodation cavity. The multiple battery cells 110 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery cells 110. The multiple battery cells 110 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery cells 110 is located in the accommodation cavity; of course, it can also be that the multiple battery cells 110 are first connected in series, in parallel, or in a mixed connection to form a battery module (not shown), and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole and are located in the accommodation cavity. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component (not shown) for realizing the electrical connection among the multiple battery cells 110. The box body plays a role in protecting and sealing the battery cell 110 and other structures. Among them, during the charging and discharging process of the battery device 100, a chemical reaction occurs inside the battery cell 110, accompanied by heat absorption and heat release. Therefore, the battery device 100 is prone to the problem of unstable temperature, and the heat is directly conducted to the environment, resulting in energy waste. The box body includes a bottom plate (not shown), side plates (not shown), and a box cover 10. In this embodiment, the box cover 10 of the box body is a hollow structure, and the heat equalizing member 20 is located inside the box cover 10. In some other embodiments, it can also be that the bottom plate or the side plate of the box body is a hollow structure, and the heat equalizing member 20 is located inside the bottom plate or the side plate. In some other embodiments, it can also be that the bottom plate, side plates, and box cover 10 of the box body are all hollow structures, and the heat equalizing member 20 is simultaneously arranged inside the bottom plate, side plates, and box cover 10. The heat equalizing member 20 can absorb heat when the ambient temperature is high and release heat when the ambient temperature is low to improve the heat preservation and heat storage effect of the box body. In addition, when the temperature of the battery device 100 is too high, the heat equalizing member 20 stores the heat, and when the temperature of the battery device 100 is too low, the heat equalizing member 20 releases the heat, while performing heat preservation, reducing heat waste, and improving the heat storage effect of the box body. In this embodiment, heat preservation and heat storage are carried out by arranging a phase change material 22 in the second accommodation space 23. In some other embodiments, it can also be that other materials such as sensible heat storage materials and chemical heat storage materials are arranged in the second accommodation space 23 for heat preservation and heat storage. Among them, the phase change material 22 is a material that changes its physical state with the change of temperature while maintaining its chemical properties. When the physical state of the phase change material 22 changes, it can absorb or release heat. The phase change material 22 is used to exchange heat with the internal environment of the phase body, and its heat absorption and heat release processes occur naturally without the need for additional power input, which can reduce energy consumption. In addition, the phase change material 22 absorbs and releases heat through the change of its physical state. During the heat absorption and heat release processes of the phase change material 22, its own temperature remains basically unchanged, which is beneficial to maintaining the overall temperature of the battery device 100 constant. Moreover, the phase change material 22 also has the advantages of large heat absorption capacity and stable properties even after repeated heat absorption and heat release.

[0057] As described above, a heat equalizing member 20 is provided inside the box wall 40 of the box body. When the temperature inside the box body is too high, the heat equalizing member 20 can absorb heat, store heat, and release the stored heat when the temperature inside the box body is too low, so as to maintain the stability of the temperature of the battery device 100, improve the heat preservation and heat storage effects of the box body, and save energy.

[0058] In some embodiments, the box wall 40 includes a bottom plate, side plates, and a box cover 10. The bottom plate and the box cover 10 are disposed opposite to each other, and the side plates connect the bottom plate and the box cover 10. Among them, the box cover 10 is a hollow structure, and the heat equalizing member 20 is located in the first accommodation space 30 inside the box cover 10.

[0059] In this embodiment, the box body is a rectangular structure. In some other embodiments, the box body can also be a cylindrical structure, an irregular polyhedron structure, etc. The box cover 10 is a hollow structure, and the heat equalizing member 20 is located inside the box cover 10 to improve the heat preservation and heat storage effects of the box body. In addition, the bottom plate and the side plates are non-hollow structures, and the non-hollow bottom plate and side plates have higher strength, enabling the box body to provide reliable support and structural strength. In addition, in this embodiment, the number of heat equalizing members 20 in the first accommodation space 30 is multiple, and the multiple heat equalizing members 20 abut against each other inside the box cover 10. In some other embodiments, the number of heat equalizing members 20 in the first accommodation space 30 can also be one.

[0060] As described above, the heat equalizing member 20 is provided inside the box cover 10, which can improve the heat preservation and heat storage effects of the box body and save energy.

[0061] In some embodiments, the heat equalizing member 20 further includes a hollow structure body 21. The hollow structure body 21 is disposed in the first accommodation space 30, and its outer wall abuts against the box cover 10 to form the inner wall of the first accommodation space 30. A second accommodation space 23 is formed inside the hollow structure body 21.

[0062] The hollow structure body 21 is used to accommodate the protective phase change material 22, facilitating the phase change material 22 to be disposed in the first accommodation space 30. Among them, the outer wall of the hollow structure body 21 has good thermal conductivity, and it can specifically be a metal hollow structure body 21 or a ceramic hollow structure body 21, etc. In some embodiments, the hollow structure bodies 21 in the first accommodation space 30 are also connected by a thermal conductive adhesive, and the outer wall of the hollow structure body 21 is also connected to the inner wall of the box cover 10 by a thermal conductive adhesive to reduce the shaking of the hollow structure bodies 21 in the first accommodation space 30. Among them, the thermal conductive adhesive can specifically be silicone thermal conductive adhesive, epoxy resin thermal conductive adhesive, polyurethane thermal conductive adhesive, etc.

[0063] As described above, the phase change material 22 has the property of unchanged repeated heat absorption and heat release, enabling the box cover 10 to have heat preservation and heat storage effects.

[0064] In some embodiments, a partition (not shown) is provided in the first accommodation space 30. The partition divides the first accommodation space 30 into several accommodation parts (not shown), and each accommodation part is provided with a hollow structure 21 so that the phase change material 22 is evenly distributed in the first accommodation space 30.

[0065] The number of partitions can be one or more. The partition divides the first accommodation space 30 into several accommodation parts, and the hollow structure 21 is arranged in each accommodation part. The partition can limit the hollow structure 21 to reduce the shaking of the hollow structure 21 in the first accommodation space 30.

[0066] As described above, it can make the phase change material 22 evenly distributed in the first accommodation space 30, improving the heat preservation and heat storage effects of the lid 10.

[0067] In some embodiments, the lid 10 includes an upper cover 11 and a lower cover 12. The upper cover 11 and the lower cover 12 are arranged opposite to each other. The plate edge of the upper cover 11 is connected to the plate edge of the lower cover 12, and they jointly define the first accommodation space 30.

[0068] The lid 10 is a double-layer structure to form the first accommodation space 30. In this embodiment, the number of the first accommodation spaces 30 is one. In some other embodiments, the number of the first accommodation spaces 30 can also be multiple.

[0069] In this embodiment, the upper cover 11 and the lower cover 12 are arranged opposite to each other and connected. The plate edge of the upper cover 11 and the plate edge of the lower cover 12 are fixed by FDS (Flow Drill Screw) method. In some other embodiments, the plate edge of the upper cover 11 and the plate edge of the lower cover 12 can also be fixed by other methods such as electric welding and rivets.

[0070] As described above, the lid 10 can have the first accommodation space 30 to accommodate the hollow structure 21.

[0071] In some embodiments, the upper cover 11 of the lid 10 is made of non-metal, the bottom plate is a metal bottom plate, and the side plate is a metal side plate.

[0072] The box body is used to protect and seal structures such as the battery cell 110. The bottom plate and the side plate are made of metal material. The bottom plate and the side plate have higher strength and can better support and protect the battery cell 110. Among them, the bottom plate and the side plate can be connected and fixed by welding, screws, bolts, etc. In some other embodiments, the bottom plate and the side plate of the box body can also be an integral structure to make the structural strength of the box body higher. In this embodiment, the bottom plate is a steel bottom plate and the side plate is a steel side plate. In some other embodiments, the bottom plate and the side plate can also be made of metal materials such as copper and aluminum.

[0073] As described above, the lid 10 is a non-metallic upper lid 11 with a low thermal conductivity, which is beneficial to the heat preservation of the box body. The bottom plate and the side plates are made of metal materials, which have high strength and can improve the impact resistance and strength of the box body.

[0074] In some embodiments, the lid 10 is any one of a carbon fiber composite lid 10, a glass fiber composite lid 10, and a thermoplastic composite lid 10.

[0075] In this embodiment, the lid 10 is a thermoplastic composite lid 10. In some other embodiments, the lid 10 can also be a glass fiber composite lid 10 or a carbon fiber composite lid 10. In some other embodiments, the lid 10 can also be made of one or more of carbon fiber composite, glass fiber composite, and thermoplastic composite materials.

[0076] As described above, the lid 10 made of such a material has high strength and a low thermal conductivity.

[0077] In some embodiments, the size of the second accommodation space 23 is larger than the volume of the phase change material 22 in the second accommodation space 23.

[0078] During the phase change process of the phase change material 22, its volume will change. In this embodiment, there is phase change material 22 and air in the second accommodation space 23, and the size of the second accommodation space 23 is larger than the volume of the phase change material 22 in the second accommodation space 23, so that the phase change material 22 can change its volume in the second accommodation space 23, reserving a volume expansion space for the phase change of the phase change material 22.

[0079] As described above, the phase change material 22 does not fill the second accommodation space 23 completely, which can reserve a volume expansion space for the phase change of the phase change material 22.

[0080] In some embodiments, the hollow structure 21 is a metal hollow structure 21.

[0081] The hollow structure 21 is made of a metal material. Metal has the characteristic of high thermal conductivity, which can improve the heat exchange efficiency of the phase change material 22. Moreover, the structure of the metal hollow structure 21 is stable and has high strength, and it is not easy to have the problem of leakage of the phase change material 22. In addition, in this embodiment, the hollow structure 21 is specifically an aluminum hollow structure 21. In some other embodiments, the hollow structure 21 can also be a steel hollow structure 21, a copper hollow structure 21, etc.

[0082] As described above, the high thermal conductivity of the metal can improve the heat exchange efficiency of the phase change material 22.

[0083] In some embodiments, the hollow structure 21 is a spherical body.

[0084] In this embodiment, the hollow structure 21 is a spherical body. The spherical hollow structure 21 is convenient for demolding and manufacturing, which can reduce production costs. In some other embodiments, the hollow structure 21 can also be a rectangular body, an irregular polygon, or other reasonable shapes.

[0085] As described above, the spherical hollow structure 21 is convenient for production.

[0086] In some embodiments, the phase change temperature of the phase change material 22 is between 50 degrees Celsius and 70 degrees Celsius.

[0087] In this embodiment, the phase change temperature of the phase change material 22 is about 55 degrees Celsius, so as to maintain the temperature inside the battery device 100 fluctuating around 55 degrees, so as to maintain the stability of the temperature of the battery device 100. In some other embodiments, the phase change temperature of the phase change material 22 can also be 50 degrees Celsius, 53 degrees Celsius, 58 degrees Celsius, 65 degrees Celsius, 70 degrees Celsius, or other reasonable temperatures.

[0088] The phase change material 22 with the above phase change temperature can maintain the stability of the temperature of the battery device 100.

[0089] In some embodiments, the phase change material 22 is one of paraffin, myristic acid, and palmitic acid.

[0090] In this embodiment, the phase change material 22 is paraffin. In some other embodiments, the phase change material 22 can be myristic acid. In some other embodiments, the phase change material 22 can be palmitic acid. In some other embodiments, the phase change material 22 can be a mixture of paraffin and myristic acid. In some other embodiments, the phase change material 22 can be a mixture of paraffin and palmitic acid. In some other embodiments, the phase change material 22 can be a mixture of myristic acid and palmitic acid. In some other embodiments, the phase change material 22 can be a mixture of paraffin, myristic acid, and palmitic acid.

[0091] The phase change material 22 of the above type can maintain the stability of the temperature of the battery device 100.

[0092] Correspondingly, the present application also proposes an electrical device, which includes a battery device 100. The battery device 100 is the battery device 100 in any of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0093] In the above electrical device, the heat balance member 20 is provided inside the box wall 40 of the box body. When the temperature inside the box body is too high, the heat balance member 20 can absorb heat, store heat, and release the stored heat when the temperature inside the box body is too low, so as to maintain the stability of the temperature of the battery device 100, improve the heat preservation and heat storage effects of the box body, and save energy.

[0094] Finally, in a specific application scenario, for the problems existing in the existing box body, such as poor heat preservation and heat storage effects, the heat generated inside the box body will be conducted to the environment through the box body, resulting in energy waste. The battery device 100 of the present application includes a box body and a heat balance member 20. The box body includes a box wall 40; at least one box wall 40 of the box body is a hollow structure to form a first accommodation space 30 inside the box wall 40. The heat balance member 20 is located in the first accommodation space 30 and abuts against the box wall 40. The box wall 40 includes a bottom plate, side plates and a box cover 10. The bottom plate and the box cover 10 are arranged opposite to each other, and the side plates connect the bottom plate and the box cover 10. Among them, the box cover 10 is a hollow structure, and the heat balance member 20 is located in the first accommodation space 30 inside the box cover 10. The heat balance member 20 includes a hollow structure body 21. The hollow structure body 21 is arranged in the first accommodation space 30, and its outer wall abuts against the box cover 10 to form the inner wall of the first accommodation space 30. A second accommodation space 23 is formed inside the hollow structure body 21; a phase change material 22 is arranged in the second accommodation space 23. The box cover 10 includes an upper cover 11 and a lower cover 12. The upper cover 11 and the lower cover 12 are arranged opposite to each other. The plate edge of the upper cover 11 is connected to the plate edge of the lower cover 12 and jointly defines the first accommodation space 30. The box cover 10 is a non-metallic upper cover 11, the bottom plate is a metal bottom plate, and the side plates are metal side plates. The hollow structure body 21 is an aluminum hollow structure body 21. The hollow structure body 21 is spherical. The phase change temperature of the phase change material 22 is between 50 degrees Celsius and 70 degrees Celsius. The phase change material 22 is paraffin wax.

[0095] In the above manner, the heat balance member 20 is provided inside the box wall 40 of the box body. When the temperature inside the box body is too high, the heat balance member 20 can absorb heat for heat storage, and release the stored heat when the temperature inside the box body is too low, so as to maintain the temperature stability of the battery device 100, improve the heat preservation and heat storage effects of the box body, and save energy.

[0096] 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 them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A box body, the box body comprising a box wall; A thermal balancing member, wherein at least one of the box walls of the box body is a hollow structure to form a first accommodating space in the box wall, the thermal balancing member is located in the first accommodating space and abuts against the box wall, the thermal balancing member forms a second accommodating space, the thermal balancing member includes a phase change material, and the phase change material is arranged in the second accommodating space.

2. The battery device according to claim 1, characterized in that: The box wall includes a bottom plate, side plates and a box cover, wherein the bottom plate and the box cover are arranged opposite to each other, and the side plates connect the bottom plate and the box cover, wherein the box cover is the hollow structure, and the heat balancing component is located in the first accommodating space in the box cover.

3. The battery device according to claim 2, characterized in that: The thermal balance member also includes: A hollow structure is disposed in the first accommodating space, an outer wall of the hollow structure abuts against the box cover to form an inner wall of the first accommodating space, and the second accommodating space is formed inside the hollow structure.

4. The battery device according to claim 3, characterized in that: A partition is provided in the first accommodating space, and the partition divides the first accommodating space into a plurality of accommodating parts. Each of the accommodating parts is provided with the hollow structure, so that the phase change material is evenly distributed in the first accommodating space.

5. The battery device according to claim 2, characterized in that: The box cover comprises an upper cover and a lower cover, the upper cover and the lower cover are arranged opposite to each other, a plate edge of the upper cover is connected to a plate edge of the lower cover, and together define the first accommodating space.

6. The battery device according to claim 2, characterized in that: The box cover is a non-metal upper cover, the bottom plate is a metal bottom plate, and the side plates are metal side plates.

7. The battery device according to claim 6, characterized in that: The box cover is any one of a carbon fiber composite material box cover, a glass fiber composite material box cover, and a thermoplastic composite material box cover.

8. The battery device according to claim 3, characterized in that: The size of the second accommodating space is greater than the volume of the phase change material in the second accommodating space.

9. The battery device according to claim 3, characterized in that: The hollow structure is a metal hollow structure.

10. The battery device according to claim 9, characterized in that: The hollow structure is an aluminum hollow structure.

11. The battery device according to claim 3, characterized in that: The hollow structure is in the shape of a sphere.

12. The battery device according to claim 3, characterized in that: The phase change temperature of the phase change material is between 50 degrees Celsius and 70 degrees Celsius.

13. The battery device according to claim 3, characterized in that: The phase change material is one of paraffin, myristic acid and palmitic acid.

14. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 13, and the battery device is used to provide electrical energy.

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