Battery device and electric device

Abstract

The utility model relates to the technical field of battery structures, and provides a battery device and a power utilization device.The battery device comprises a single battery and a heating piece, the heating piece is arranged on one side of the single battery and used for exchanging heat with the single battery, and the heating piece comprises a heating body part, a first protective layer and a second protective layer; the first protective layer and the second protective layer cover the two opposite sides of the heating body part, and at least one of the first protective layer and the second protective layer is a concrete structure part; according to the battery device provided by the embodiment of the invention, at least one of the first protective layer and the second protective layer adopts the concrete structure part, and at least one side of the heating body part is covered and protected by utilizing the concrete structure part with relatively high structural strength, so that the overall strength of the heating piece can be effectively improved; therefore, the probability that the heating body part is damaged under the external acting force is lower, and the reliability of the battery device is better.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery structures, and particularly provides a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction is a key factor for sustainable development of the automobile industry, and electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery device technology is an important factor for the development of the electric vehicles.

[0003] In order to ensure a good working environment of the battery device and improve the performance of the battery device, a heating structure is usually arranged in the battery device, and the heating structure is used to heat the battery monomer in a low-temperature environment, so that the working temperature of the battery monomer is within a preset temperature range. However, due to the weak structural strength of the heating structure, the heating structure is prone to damage during use, thereby affecting the normal use of the battery device. UTILITY MODEL CONTENT

[0004] The purpose of the embodiments of the application is to provide a battery device and a power utilization device, and to solve the problem that the heating structure in the battery device is easily damaged due to the low structural strength and affects the use of the battery device.

[0005] To achieve the above-mentioned purpose, the technical solutions adopted by the embodiments of the application are as follows:

[0006] In a first aspect, the embodiments of the application provide a battery device, which comprises a battery monomer and a heating piece. The heating piece is arranged on one side of the battery monomer and is used for heat exchange with the battery monomer. The heating piece comprises a heating body part, a first protective layer and a second protective layer. The heating body part is provided with a connecting end. The first protective layer and the second protective layer are arranged on opposite sides of the heating body part. The connecting end is exposed to the first protective layer or the second protective layer. At least one of the first protective layer and the second protective layer is a concrete structure part.

[0007] The battery device provided by the embodiments of the application uses the connecting end to conduct electricity to the heating body part, so that the heating body part generates heat and performs heating operation on the battery monomer. At the same time, the first protective layer and the second protective layer are arranged on opposite sides of the heating body part to realize insulation protection of the heating body part. At least one of the first protective layer and the second protective layer is a concrete structure part. The concrete structure part with strong structural strength is used to cover and protect at least one side of the heating body part. In this way, the strength of the whole heating piece can be effectively improved, so that the probability of damage of the heating body part under external force is lower, and the reliability of the battery device is better.

[0008] In some embodiments, the battery cell is arranged on a side of the first protective layer away from the second protective layer, and the first protective layer is a concrete structure.

[0009] By adopting the above technical solutions, the first protective layer in the heating member is arranged adjacent to the battery cell, and the first protective layer is a concrete structure. In this way, the protection effect of the concrete structure on the heating body is more optimal, and the probability of short circuit between the heating body and the battery cell is lower, thereby further improving the reliability of the battery device.

[0010] In some embodiments, the first protective layer and the second protective layer are both concrete structures, and the first protective layer and the second protective layer are integrally formed.

[0011] By adopting the above technical solutions, the first protective layer and the second protective layer are both concrete structures, and the first protective layer and the second protective layer are integrally formed. In this way, the overall strength of the heating member can be further improved, and the protection capability of the heating body inside can be improved.

[0012] In some embodiments, the battery cell is arranged on a side of the first protective layer away from the second protective layer, and a partition is arranged on a side of the first protective layer facing the battery cell, and the partition is used to form contact with the battery cell.

[0013] By adopting the above technical solutions, the partition is used to replace the first protective layer and form contact with the battery cell. In this way, the probability of the concrete structure of the first protective layer causing wear and tear to the battery cell can be effectively reduced.

[0014] In some embodiments, the partition is integrally formed on the first protective layer, or the partition is connected to a surface of the first protective layer facing the battery cell.

[0015] By adopting the above technical solutions, the partition can be fixed with the first protective layer in an integrally formed manner. In this way, the firmness of the partition can be improved. Alternatively, the partition can be connected to the surface of the first protective layer to form contact with the battery cell.

[0016] In some embodiments, the partition is a heat-conducting structure.

[0017] By adopting the above technical solutions, the partition is a heat-conducting structure. In this way, the heat conduction effect of the heating body on the battery cell can be effectively improved, and the heating effect of the heating member on the battery cell can be improved.

[0018] In some embodiments, at least one of the first protective layer and the second protective layer is a cement concrete structure.

[0019] By adopting the technical scheme, at least one of the first protective layer and the second protective layer adopts the cement concrete structure part, the cement concrete structure part has higher structural strength, so that the overall strength of the heating piece is higher, and the probability of damage of the heating piece under external force is lower.

[0020] In some embodiments, the battery device further includes a box body, an accommodation cavity is formed in an interior of the box body, and the battery cell is accommodated in the accommodation cavity; wherein the box body is a concrete structural member, and at least one of the first protective layer and the second protective layer is a concrete structure part and is integrally formed with the box body.

[0021] By adopting the technical scheme, at least one of the first protective layer and the second protective layer adopts the cement concrete structure part, the cement concrete structure part has higher structural strength, so that the overall strength of the heating piece is higher, and the probability of damage of the heating piece under external force is lower.

[0022] In some embodiments, the battery cell is arranged on a side of the first protective layer away from the second protective layer, and a surface of the first protective layer is flush with an inner side wall surface of the box body facing the accommodation cavity.

[0023] By adopting the technical scheme, by arranging the surface of the first protective layer to be flush with the inner side wall surface of the box body facing the accommodation cavity, the space occupied by the heating piece in the accommodation cavity is lower, so that the capacity of the accommodation cavity for accommodating the battery cell can be effectively improved, and the energy density of the battery device can be improved.

[0024] In some embodiments, the box body is a cement concrete structural member.

[0025] By adopting the technical scheme, the cement concrete structure part has higher structural strength, so that the strength of the box body is also higher.

[0026] In a second aspect, the embodiments of the present application further provide a power utilization device, which includes the battery device as described above and is configured to provide electric energy.

[0027] The power utilization device provided by the embodiments of the present application has higher reliability. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or related technical descriptions will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0029] Figure 1A structural schematic diagram of a vehicle provided for an embodiment of the present application;

[0030] Figure 2 An exploded view of a battery device provided for an embodiment of the present application;

[0031] Figure 3 An exploded structural schematic diagram of a battery cell provided for an embodiment of the present application;

[0032] Figure 4 An overall structural schematic diagram of a heating piece when the first protective layer and the second protective layer of the heating piece are both concrete structural parts provided for an embodiment of the present application;

[0033] Figure 5 An exploded structural schematic diagram of a heating piece when the first protective layer and the second protective layer of the heating piece are both concrete structural parts provided for an embodiment of the present application;

[0034] Figure 6 An exploded structural schematic diagram of a heating piece when one of the first protective layer and the second protective layer of the heating piece is a concrete structural part provided for an embodiment of the present application;

[0035] Figure 7 An exploded structural schematic diagram of a heating piece when the heating piece is applied to a box provided for an embodiment of the present application;

[0036] Figure 8 A structural schematic diagram of a heating piece when a separation part is arranged on the first protective layer of the heating piece provided for an embodiment of the present application.

[0037] In the drawings, various reference numerals refer to:

[0038] 1000, vehicle;

[0039] 100, battery device; 200, controller; 300, motor;

[0040] 10, box; 101, accommodating cavity; 11, first box; 12, second box;

[0041] 20, battery cell; 21, end cover; 21a, electrode terminal; 22, shell; 23, electrode assembly; 23a, tab;

[0042] 30, heating piece; 31, heating body part; 31a, connection end; 32, first protective layer; 321, separation part; 33, second protective layer. DETAILED DESCRIPTION

[0043] Embodiments of the present application are described below in detail with reference to examples thereof illustrated in the accompanying drawings, wherein like or similar elements across the various figures are denoted by like or similar reference numerals, and the embodiments described below are illustrative only and are not intended to limit the present application.

[0044] In the description of the present application, it needs to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as industrial equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0048] In order to ensure a good working environment for the battery device and improve the performance of the battery device, a heating structure is usually arranged inside the battery device. In a low temperature environment, the battery monomer inside the battery device can be heated by the heating structure to make the working temperature of the battery monomer within a preset temperature range. However, due to the weak structural strength of the heating structure, damage may occur during use. For example, the heating wire, heating rod and other structures used to achieve heating may be at risk of breaking, or the heating film used to insulate and protect the heating wire, heating rod and other structures may be at risk of breaking and causing short circuit, thereby affecting the normal use of the battery device.

[0049] Based on the above considerations, in order to solve the problem that the heating structure in the battery device is easily damaged due to low structural strength and affects the use of the battery device, a battery device is designed. The connection end is used to conduct electricity to the heating body part to make the heating body part heat and heat the battery monomer. At the same time, the first protective layer and the second protective layer are arranged on the opposite sides of the heating body part to achieve insulation protection of the heating body part. At least one of the first protective layer and the second protective layer is a concrete structure part. The concrete structure part with strong structural strength is used to cover and protect at least one side of the heating body part. In this way, the strength of the heating member as a whole can be effectively improved, so that the probability of damage to the heating body part under external force is lower, and the reliability of the battery device is better.

[0050] The battery device disclosed in the embodiments of the present application can be used in a power consumption device using a battery as a power source or a variety of energy storage systems using a battery as an energy storage element. The power consumption device can be, but is not limited to, electric tools, electric vehicles, electric engineering machinery, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0051] The following embodiments are described for convenience with a power consumption device of an embodiment of the present application as an example of a vehicle 1000.

[0052] Please refer to Figure 1 , Figure 1A structural schematic of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be an engineering vehicle (e.g., a truck, a hook machine, a crane, a tractor, etc.), a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the 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. In some embodiments, the battery device 100 can also be used for the counterweight of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the power demand of the vehicle 1000 during starting, navigation, and driving.

[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, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0054] Please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 is provided for some embodiments of the present application. The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0055] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0056] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0057] In some embodiments, the battery device can be a battery pack, which includes a box body 10 and one or more battery cell assemblies accommodated in the box body 10.

[0058] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box body 10 by fixing the battery module in the box body 10.

[0059] As an example, the battery cell assembly can also be accommodated in the box body 10 by directly fixing a plurality of battery cells 20 in the box body 10.

[0060] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are fastened so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0061] As an example, the box 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are connected with the frame, respectively, so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly.

[0062] In some embodiments, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0063] The technical solutions described in the embodiments of the present application are applicable to various electric devices using the battery cell 20, such as electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, for example, spacecraft including airplanes, rockets, space shuttles, and spacecraft.

[0064] In the embodiments of the present application, the battery cell 20 can be a secondary battery, which means that the battery cell 20 can be activated by charging after discharging.

[0065] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0066] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery device. As Figure 3 , the battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23, and other functional components.

[0067] The end cover 21 refers to a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cover 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is not easily deformed when subjected to extrusion collision, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. The end cover 21 can be provided with functional components such as electrode terminals 21a. The electrode terminals 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0068] The housing 22 is a component for fitting the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components. The housing 22 and the end cover 21 can be independent components, and an opening can be provided on the housing 22, and the end cover 21 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the housing 22 can also be integrated, specifically, the end cover 21 and the housing 22 can form a common connecting surface before other components enter the housing, and when it is necessary to encapsulate the internal environment of the housing 22, the end cover 21 is covered on the housing 22. The housing 22 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0069] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained within the case 22. The electrode assembly 23 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly, and portions without active materials of the positive electrode sheet and the negative electrode sheet each constitute a tab 23a. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery device 100, active ions (e.g., lithium ions) reversibly intercalate and deintercalate between the positive electrode sheet and the negative electrode sheet to achieve charging and discharging, and the tab 23a connects the electrode terminal 21a to form a current loop.

[0070] According to some embodiments of the present application, please refer to Figure 2 、 Figures 4 to 6 The battery device 100 provided by the embodiments of the present application comprises a battery cell 20 and a heating member 30, the heating member 30 is arranged on one side of the battery cell 20 and is used for heat exchange with the battery cell 20, the heating member 30 comprises a heating body 31, a first protective layer 32 and a second protective layer 33, the heating body 31 is provided with a connecting end 31a; the first protective layer 32 and the second protective layer 33 are arranged on opposite sides of the heating body 31, and the connecting end 31a is exposed to the first protective layer 32 or the second protective layer 33; wherein at least one of the first protective layer 32 and the second protective layer 33 is a concrete structure.

[0071] The heating member 30 refers to a structure member used for heating to achieve the heating operation of the battery cell 20. Optionally, the heating member 30 can be but is not limited to a heating wire, a heating rod or the like; by energizing the heating member 30, according to the Joule law, the electric current will be converted into heat energy on the heating member 30 and heat will be generated, so that the purpose of heating can be achieved.

[0072] The heating member 30 is arranged on one side of the battery cell 20; optionally, the heating member 30 can be arranged on any side of the battery cell 20. Exemplarily, the heating member 30 can be arranged on the bottom side of the battery cell 20, i.e. the end side of the battery cell 20 facing the direction of gravity in the use state, and the battery cell 20 can be connected to the heating member 30 by means of adhesive bonding or the like; or the heating member 30 can also be arranged on the circumferential side of the battery cell 20, i.e. any side of the battery cell 20 perpendicular to the direction of gravity in the use state, and the heating member 30 can be bonded to the circumferential surface of the battery cell 20 by means of adhesive bonding.

[0073] The heating member 30 comprises a heating body part 31, a first protective layer 32 and a second protective layer 33. It can be understood that the heating body part 31 refers to a part specifically used for heat generation. Exemplarily, the heating body part 31 can be but is not limited to a heating wire, a heating rod, a heating net or the like structure.

[0074] The heating body part 31 is provided with a connecting end 31a. The connecting end 31a refers to a port structure used for electrical connection with other structures. The connecting end 31a is used to electrically connect with other structures to realize the energization operation of the heating body part 31, so that the heating body part 31 can generate heat to heat the battery monomer 20.

[0075] The first protective layer 32 and the second protective layer 33 refer to structures used for covering the heating body part 31 to realize insulation protection.

[0076] At least one of the first protective layer 32 and the second protective layer 33 is a concrete structure part. That is, at least one of the protective layer and the second protective layer 33 is a component or structure made of concrete material. The concrete structure refers to a composite material structure in which the aggregate is cemented into a whole by the cementitious material. According to the different cementitious materials, the concrete can include cement concrete, gypsum concrete, Portland cement concrete, water glass concrete, asphalt concrete, polymer concrete, etc. For example, the cement concrete is a concrete obtained by mixing cement as a cementitious material, sand and gravel as aggregate, and water (which can contain additives and admixtures) in a certain proportion, and then stirring. The concrete structure has simple manufacturing process, low cost and high structural strength.

[0077] Alternatively, in some embodiments, one of the first protective layer 32 and the second protective layer 33 is a concrete structure part, and the other of the first protective layer 32 and the second protective layer 33 can be an insulating film layer. In this way, the concrete structure part can be covered on one side of the heating body part 31 and integrated with the heating body part 31 to realize the reinforcing effect of the heating body part 31, and the insulating film layer can be covered on the other side of the heating body part 31, and the insulating film layer can be connected with the concrete structure part to form an integral body by adhesion or the like.

[0078] Alternatively, in some embodiments, one of the first protective layer 32 and the second protective layer 33 is a concrete structure part, and the other of the first protective layer 32 and the second protective layer 33 can be an insulating film layer. In this way, the concrete structure part can be covered on one side of the heating body part 31 and integrated with the heating body part 31 to realize the reinforcing effect of the heating body part 31, and the insulating film layer can be covered on the other side of the heating body part 31, and the insulating film layer can be connected with the concrete structure part to form an integral body by adhesion or the like.

[0079] It should be understood that in the above two embodiments, the connection mode of the concrete structure part and the heating body part 31 can be that the heating body part 31 is arranged in a mold for pouring, and then the concrete slurry is poured into the mold and covers the heating body part 31 (when one of the first protective layer 32 and the second protective layer 33 is a concrete structure part, the concrete slurry only covers part of the heating body part 31, and when both the first protective layer 32 and the second protective layer 33 are concrete structure parts, the concrete slurry can completely cover the heating body part 31), and after the concrete slurry is solidified, the concrete structure part is formed, so that the heating body part 31 is integrated with the concrete structure part; the high-strength structure of the concrete structure part can be used to form a better protective effect on the heating body part 31.

[0080] The battery device 100 provided by the embodiment of the present application uses the connection end 31a to conduct electricity to the heating body part 31 to make the heating body part 31 heat and perform heating operation on the battery monomer 20, and meanwhile, the first protective layer 32 and the second protective layer 33 are arranged on opposite sides of the heating body part 31 to achieve insulation protection of the heating body part 31; at least one of the first protective layer 32 and the second protective layer 33 is a concrete structure part, and the concrete structure part with strong structural strength is used to arrange and protect at least one side of the heating body part 31, so that the strength of the heating element 30 as a whole can be effectively improved, so that the probability of damage to the heating body part 31 under external force is lower, and the reliability of the battery device 100 is better.

[0081] Please refer to Figure 2 、 Figures 4 to 6 In some embodiments, the battery monomer 20 is arranged on the side of the first protective layer 32 away from the second protective layer 33, and the first protective layer 32 is a concrete structure part.

[0082] In the embodiment, the first protective layer 32 is a concrete structure part. Alternatively, the second protective layer 33 can be a concrete structure part, and the second protective layer 33 can also be an insulating film layer or other insulating protective structure.

[0083] At the same time, the battery monomer 20 is arranged on the side of the first protective layer 32 away from the second protective layer 33; alternatively, the battery monomer 20 can be supported on the first protective layer 32 in the direction of gravity in the use state; or the first protective layer 32 can be arranged on the peripheral side wall surface of the battery monomer 20 in the use state.

[0084] It should be understood that according to the characteristics of the concrete material that is difficult to burn, when the battery monomer 20 is arranged on the side of the first protective layer 32 which is a concrete structure part, the probability of damage to the first protective layer 32 in a high-temperature environment is lower, so that the probability of short circuit between the heating body part 31 and the battery monomer 20 is also lower.

[0085] In this way, the concrete structure part is used as the first protective layer 32 to further improve the protection effect of the heating body part 31, and the probability of short circuit between the heating body part 31 and the battery cell 20 is low, thereby further improving the reliability of the battery device 100.

[0086] Please refer to Figure 2 , Figure 4 and Figure 5 In some embodiments, the first protective layer 32 and the second protective layer 33 are both concrete structure parts, and the first protective layer 32 and the second protective layer 33 are integrally formed.

[0087] In this embodiment, the first protective layer 32 and the second protective layer 33 are both concrete structure parts; in this way, the opposite sides of the heating body part 31 can be covered and protected by the concrete structure parts.

[0088] The first protective layer 32 and the second protective layer 33 are integrally formed, that is, the first protective layer 32 and the second protective layer 33 can be integrally formed by pouring process. For example, the first protective layer 32 and the second protective layer 33 can be integrally formed by pouring process as follows: the heating body part 31 is arranged in a mold for pouring, then the concrete slurry is poured into the mold and covers the heating body part 31, and after the concrete slurry solidifies to form a concrete structure part, the heating body part 31 is integrally formed in the interior of the concrete structure part, that is, the first protective layer 32 and the second protective layer 33 are integrally formed by pouring the concrete structure part.

[0089] In this way, the first protective layer 32 and the second protective layer 33 are both concrete structure parts, and the first protective layer 32 and the second protective layer 33 are integrally formed, which can further improve the overall strength of the heating member 30 and the protection capability of the internal heating body part 31; in the case of external force, the probability of damage of the concrete structure part is low, and the probability of damage of the heating body part 31 inside the concrete structure part is also low.

[0090] Please refer to Figure 2 , Figure 5 and Figure 8 In some embodiments, the battery cell 20 is arranged on the side of the first protective layer 32 away from the second protective layer 33, and the side of the first protective layer 32 facing the battery cell 20 is provided with a separation part 321 for contacting the battery cell 20.

[0091] The separation part 321 refers to a structure part arranged on the first protective layer 32 and separating the battery cell 20 from the first protective layer 32.

[0092] Optionally, the partition 321 can be, but is not limited to, a plate structure (e.g., a metal plate, a plastic plate, etc.), a film structure (e.g., a silicon carbide film, a polyurethane film, a tempered film, etc.), a coating structure (e.g., a ceramic coating, a polyester coating, etc.), or the like.

[0093] At least part of the partition 321 is arranged on the side surface of the first protective layer 32 facing the battery cell 20; optionally, the partition 321 can be arranged on the side surface of the first protective layer 32 facing the battery cell 20, for example, a coating structure can be formed on the surface of the first protective layer 32 by spraying or coating operation, or a film structure is adhered to the surface of the first protective layer 32; or the partition 321 can be embedded on the first protective layer 32, and part of the partition 321 is exposed on the side surface of the first protective layer 32 facing the battery cell 20.

[0094] For example, in some embodiments, the partition 321 is a metal end plate (e.g., an aluminum plate), which can be embedded on the first protective layer 32 and partially exposed on the side surface of the first protective layer 32 facing the battery cell 20; in this way, the battery cell 20 can be in contact with the metal end plate, and the probability of the battery cell 20 directly contacting the first protective layer 32 is low.

[0095] Alternatively, in another embodiment, the partition 321 is an insulating film layer, which can be attached to the side surface of the first protective layer 32 facing the battery cell 20; in this way, the battery cell 20 can be in contact with the insulating film layer, and the probability of the battery cell 20 directly contacting the first protective layer 32 is low.

[0096] It can be understood that since the concrete structure is a composite material structure formed by cementing aggregates with cementitious materials, the surface of the first protective layer 32 is relatively rough, and there are many burrs and dust particles on the surface of the first protective layer 32. When the surface of the first protective layer 32 directly contacts the battery cell 20, the surface of the first protective layer 32 is likely to scratch and wear the battery cell 20.

[0097] In this way, the partition 321 is used to replace the first protective layer 32 and contacts the battery cell 20, which can effectively reduce the probability of the concrete structure of the first protective layer 32 causing wear to the battery cell 20.

[0098] Please refer to Figure 2 and Figure 8 In some embodiments, the partition 321 is integrally formed on the first protective layer 32; or the partition 321 is connected to the side surface of the first protective layer 32 facing the battery cell 20.

[0099] In the embodiment, the partition 321 can be integrally formed with the first protective layer 32. Understandably, the partition 321 can be integrally formed with the first protective layer 32 by a pouring process.

[0100] Exemplarily, in some embodiments, the partition 321 can be integrally formed with the first protective layer 32 in the following manner: the partition 321 is fixed in a mold for pouring operation, and then a concrete slurry is poured in the mold to form a concrete structure after solidification of the concrete slurry, at this time, the partition 321 is integrally embedded in the concrete structure, and part of the partition 321 is exposed on the side surface of the first protective layer 32 facing the battery monomer 20.

[0101] Alternatively, the partition 321 is connected to the side surface of the first protective layer 32 facing the battery monomer 20. Optionally, the partition 321 can be assembled on the side surface of the first protective layer 32 facing the battery monomer 20 by adhesion, embedding connection or the like; or the partition 321 can be formed on the side surface of the first protective layer 32 facing the battery monomer 20 by spraying or coating.

[0102] In this way, the partition 321 can be fixed by integrally forming with the first protective layer 32 to improve the installation stability of the partition 321; or the partition 321 can be directly connected to the surface of the first protective layer 32 to realize the purpose of the partition 321 replacing the first protective layer 32 to abut against the battery monomer 20.

[0103] Please refer to Figure 2 and Figure 8 In some embodiments, the partition 321 is a heat-conducting structure.

[0104] It should be understood that the heat-conducting structure refers to a component with good heat-conducting performance.

[0105] In the embodiment, the partition 321 can be a heat-conducting structure. Optionally, the heat-conducting structure can be but is not limited to a metal plate, a heat-conducting adhesive layer, a heat-conducting coating or the like.

[0106] In this way, the partition 321 adopts the heat-conducting structure, so that the partition 321 can not only replace the first protective layer 32 to contact the battery monomer 20, but also improve the heating effect of the heating element 30 on the battery monomer 20.

[0107] Please refer to Figure 2 , Figures 4 to 6 In some embodiments, at least one of the first protective layer 32 and the second protective layer 33 is a cement concrete structure.

[0108] In some embodiments, the first protective layer 32 and the second protective layer 33 are both cement concrete structural parts.

[0109] In some embodiments, at least one of the first protective layer 32 and the second protective layer 33 is a cement concrete structural part, and the cement concrete structural part has a higher structural strength. Thus, the overall strength of the heating member 30 is higher, and the probability of damage of the heating member 30 under external force is lower.

[0110] Please refer to Figure 2 , Figure 5 and Figure 7 In some embodiments, the battery device 100 further comprises a box body 10, an accommodating cavity 101 is formed in the interior of the box body 10, and the battery cell 20 is accommodated in the accommodating cavity 101. The box body 10 is a cement concrete structural part, and at least one of the first protective layer 32 and the second protective layer 33 is a cement concrete structural part and is integrally formed with the box body 10.

[0111] In the present embodiment, the box body 10 of the battery device 100 can be a cement concrete structural part, which is a hollow member. The hollow part in the interior constitutes the internal space of the accommodating cavity 101, and is used to accommodate the internal structure including the battery cell 20, the heating member 30, etc.

[0112] In some embodiments, at least one of the first protective layer 32 and the second protective layer 33 of the heating member 30 is a cement concrete structural part and is integrally formed with the cement concrete structural part of the box body 10.

[0113] For example, in some embodiments, the first protective layer 32 and the second protective layer 33 are both cement concrete structural parts. Thus, the first protective layer 32 and the second protective layer 33 can be integrally formed with the box body 10, i.e., the heating body part 31 is cast in the interior of the box body 10, such as the inner side of the bottom wall of the box body 10, during the casting process. Thus, the bottom wall of the box body 10 can also be used as the first protective layer 32 and the second protective layer 33 of the heating member 30.

[0114] Alternatively, in some other embodiments, one of the first protective layer 32 and the second protective layer 33 is a concrete structure, and the other is an insulation film layer. For example, the first protective layer 32 is a concrete structure, and the first protective layer 32 can be integrally formed with the box body 10. For example, the bottom wall of the box body 10 is integrally formed with the first protective layer 32. In this way, the portion of the heating body part 31 can be integrally formed in the bottom wall of the box body 10. The bottom wall of the box body 10 can be used as the first protective layer 32. Meanwhile, the second protective layer 33 is arranged on the bottom wall of the box body 10 and covers the heating body part 31, so as to achieve the insulation protection of the heating body part 31.

[0115] In this way, at least one of the first protective layer 32 and the second protective layer 33 which is a concrete structure is integrally formed with the box body 10. In this way, the stability of the connection between the heating element 30 and the box body 10 can be improved, and the stability of the heating element 30 can be improved, so as to further reduce the probability of damage of the heating element 30.

[0116] Please refer to Figure 2 and Figure 5 In some embodiments, the battery monomer 20 is arranged on the side of the first protective layer 32 away from the second protective layer 33. The surface of the first protective layer 32 is flush with the inner side wall surface of the box body 10 facing into the containing cavity 101.

[0117] In this embodiment, the battery monomer 20 can be arranged on the side of the first protective layer 32 away from the second protective layer 33, i.e., the first protective layer 32 is arranged towards the battery monomer 20.

[0118] Meanwhile, the surface of the first protective layer 32 is flush with the inner side wall surface of the box body 10 facing into the containing cavity 101. In this way, the first protective layer 32 and the second protective layer 33 of the heating element 30 can be embedded in the box body 10 or integrally formed with the box body 10.

[0119] For example, in some embodiments, a mounting groove can be arranged on the inner side wall surface of the box body 10. The first protective layer 32 of the heating element 30 is inserted into the mounting groove in the depth direction of the mounting groove, and the surface of the second protective layer 33 is flush with the inner side wall surface of the box body 10.

[0120] Alternatively, in some other embodiments, the box body 10 and the first protective layer 32 and the second protective layer 33 can be integrally casted and formed. In this way, at least part of the wall surface of the box body 10 can be used as the first protective layer 32 and the second protective layer 33 and cover the heating body part 31. The heating body part 31 is integrally formed inside the wall of the box body 10, and the connection end 31a is exposed outside the wall of the box body 10 for the plug-in power connection operation.

[0121] In this way, by arranging the surface of the first protective layer 32 flush with the inner side wall surface of the box body 10 facing the accommodating cavity 101, the heating element 30 occupies a smaller space in the accommodating cavity 101, thereby effectively improving the capacity of the accommodating cavity 101 for accommodating the battery monomer 20, and further improving the energy density of the battery device 100.

[0122] Please refer to Figure 2 and Figure 7 In some embodiments, the box body 10 is a cement concrete structural member.

[0123] In this way, the cement concrete structural member has better structural strength, and the box body 10 also has better strength.

[0124] In the following, the battery device 100 provided by the present application will be further described according to specific embodiments.

[0125] Please refer to Figures 2 to 8 In the present embodiment, the battery device 100 includes a battery monomer 20 and a heating element 30, the heating element 30 is arranged on one side of the battery monomer 20 and is used for heat exchange with the battery monomer 20.

[0126] The heating element 30 includes a heating body part 31, a first protective layer 32 and a second protective layer 33, the heating body part 31 is provided with a connecting end 31a; the first protective layer 32 and the second protective layer 33 are arranged on opposite sides of the heating body part 31, and the connecting end 31a is exposed to the first protective layer 32 or the second protective layer 33; wherein at least one of the first protective layer 32 and the second protective layer 33 is a concrete structural member. In the present embodiment, both the first protective layer 32 and the second protective layer 33 can be a concrete structural member, in this way, the first protective layer 32 and the second protective layer 33 can be integrally cast, and the heating body part 31 can be integrally cast between the first protective layer 32 and the second protective layer 33, so that the concrete structural member can better protect the heating body part 31.

[0127] Please refer to Figure 1 and Figure 2 The present application also provides a power utilization device, which includes the battery device 100 as described above, and the battery device 100 is used for providing electric energy.

[0128] The power utilization device provided by the present application, for example, the vehicle 1000 as described above, includes the battery device 100 as described above, in this way, the reliability of the power utilization device is better.

[0129] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by: The battery device comprises: a battery cell; and a heating element arranged on one side of the battery cell and used for heat exchange with the battery cell, the heating element comprising a heating body part, a first protective layer and a second protective layer, the heating body part being provided with a connecting end; the first protective layer and the second protective layer being arranged on opposite sides of the heating body part, the connecting end being exposed to the first protective layer or the second protective layer; wherein at least one of the first protective layer and the second protective layer is a concrete structure part.

2. The battery device of claim 1, wherein: The battery cell is arranged on a side of the first protective layer away from the second protective layer, and the first protective layer is the concrete structure part.

3. The battery device of claim 1, wherein: Both the first protective layer and the second protective layer are the concrete structure part, and the first protective layer and the second protective layer are integrally formed.

4. The battery device according to claim 2 or 3, characterized by: The battery cell is arranged on a side of the first protective layer away from the second protective layer, and a partition part is arranged on a side of the first protective layer facing the battery cell, the partition part being used for forming contact with the battery cell.

5. The battery device of claim 4, wherein: The partition part is integrally formed on the first protective layer, or the partition part is connected to a side surface of the first protective layer facing the battery cell.

6. The battery device of claim 5, wherein: The partition part is a heat-conducting structure part.

7. The battery device according to any one of claims 1 to 3, characterized by: At least one of the first protective layer and the second protective layer is a cement concrete structure part.

8. The battery device according to any one of claims 1 to 3, characterized by: The battery device further comprises a box body, an accommodating cavity being formed in an interior of the box body, and the battery cell being accommodated in the accommodating cavity; wherein the box body is a concrete structure part, at least one of the first protective layer and the second protective layer is the concrete structure part and is integrally formed with the box body.

9. The battery device of claim 8, wherein: The battery cell is arranged on a side of the first protective layer away from the second protective layer, and a surface of the first protective layer is flush with an inner side wall surface of the box body facing the accommodating cavity.

10. The battery device of claim 8, wherein: The box body is a cement concrete structure part.

11. An electrical device, characterized by: The battery device comprises any one of claims 1 to 10, and is used for providing electric energy.

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