Battery device and electric device

Abstract

The utility model relates to the technical field of battery devices, and provides a battery device and a power utilization device.The battery device comprises battery monomers and heat management parts, in the first direction, first pole pieces, separators and second pole pieces are alternately stacked, in the second direction, the size H of a shell is larger than or equal to 20 mm and smaller than or equal to 70 mm, the heat management parts are arranged on at least one side of the shell, and in the third direction, the first pole pieces, the separators and the second pole pieces are alternately stacked. A first electrode terminal and a second electrode terminal are arranged on the shell, the first electrode terminal is electrically connected to the first pole piece, and the second electrode terminal is electrically connected to the second pole piece; according to the battery device provided by the embodiment of the invention, the multiple layers of first pole pieces and second pole pieces which are sequentially stacked in the first direction can directly conduct heat to the heat management component through the shell in the second direction, so that the heat dissipation efficiency can be effectively improved; and the size H of the shell in the second direction is limited to limit the heat conduction distance from the first pole piece and the second pole piece in the shell to the heat management component, so that the influence of the heat conduction distance on heat dissipation is reduced.

Description

Technical Field

[0001] This application relates to the field of battery device technology, and in particular to a battery device and an electrical device. Background Technology

[0002] Batteries are widely used in the new energy field, such as in electric vehicles and new energy vehicles, which have become a new trend in the automotive industry. With the increasing demand for shorter battery charging times, the required charging current is increasing, while the heat exchange time is decreasing. Therefore, improving battery heat dissipation is a pressing issue that needs to be addressed. Utility Model Content

[0003] The purpose of this application is to provide a battery device and an electrical device that improve the heat dissipation efficiency of the battery device.

[0004] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0005] In a first aspect, embodiments of this application provide a battery device, including a battery cell and a thermal management component. The battery cell includes a housing and a first electrode, a second electrode, and a separator housed within the housing. The first and second electrodes have opposite polarities. The housing has a first direction, a second direction, and a third direction that are perpendicular to each other. In the first direction, the first electrode, the separator, and the second electrode are alternately stacked. In the second direction, the size of the housing is H, where 20mm ≤ H ≤ 70mm. In the third direction, a first electrode terminal and a second electrode terminal are provided on the housing. The first electrode terminal is electrically connected to the first electrode, and the second electrode terminal is electrically connected to the second electrode. In the second direction, a thermal management component is provided on at least one side of the housing, and the thermal management component is connected to the housing to regulate the temperature of the battery cell.

[0006] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application limits the size H of the outer casing in the second direction to be greater than or equal to 20 mm (hereinafter expressed in mm) and less than or equal to 70 mm, and provides a thermal management component on at least one side of the outer casing in the second direction. Thus, by limiting the size of the outer casing in the distribution direction of the thermal management component, the thermal conduction distance from the first electrode and the second electrode in the outer casing to the thermal management component is limited, thereby reducing the impact of the thermal conduction distance on heat dissipation. At the same time, the first electrode, the separator and the second electrode are stacked sequentially in the outer casing along the first direction. Thus, the multilayer first electrode and the second electrode stacked sequentially can conduct heat directly to the thermal management component through the outer casing in the second direction, thereby further improving the heat dissipation efficiency.

[0007] In some embodiments, in a first direction, a plurality of battery cells are arranged sequentially to form a battery cell assembly, and in a second direction, the projection of the battery cell assembly is located on a thermal management component.

[0008] By adopting the above technical solution, multiple battery cells in the battery cell assembly can simultaneously conduct heat to the thermal management component, thereby effectively improving the heat dissipation efficiency of the battery cell assembly. At the same time, the projection of the battery cell assembly is located on the thermal management component, that is, the thermal management component can cover the shell of all battery cells in the battery cell assembly in the second direction, thereby ensuring the heat dissipation efficiency of the entire battery cell assembly.

[0009] In some embodiments, the battery cell assembly is arranged in multiple layers along a second direction, and a thermal management component is disposed between at least two adjacent battery cell assemblies.

[0010] By adopting the above technical solution, the thermal management component set between two adjacent battery cell modules can accelerate the heat dissipation of these two battery cell modules, thereby effectively improving the heat dissipation efficiency of the battery cell modules.

[0011] In some embodiments, a thermal management component is provided between adjacent battery cell assemblies, and the housings of adjacent battery cell assemblies are all connected to the thermal management component.

[0012] By adopting the above technical solution, only one thermal management component can be set between two adjacent battery cell modules. The thermal management component can conduct heat to the two adjacent battery cell modules at the same time, and can also improve the compactness between the two adjacent battery cell modules, thereby improving the energy density of the battery device.

[0013] In some embodiments, two thermal management components are disposed between adjacent battery cell assemblies, and the thermal management components are respectively connected to the housing of the corresponding battery cell assembly.

[0014] By adopting the above technical solution, two thermal management components can be set between two adjacent battery cell modules. The two thermal management components can be used to conduct heat to the corresponding battery cell module, which can effectively improve the heat dissipation efficiency of the battery cell module.

[0015] In some embodiments, in the second direction, thermal management components are provided on opposite sides of the housing of each battery cell assembly.

[0016] By adopting the above technical solution, the heat dissipation area of ​​each layer of battery cell module through the thermal management component is relatively larger, thereby effectively improving the heat dissipation efficiency of each layer of battery cell module.

[0017] In some embodiments, in the second direction, two adjacent thermal management components are connected by a connector.

[0018] By adopting the above technical solution, the stability of the thermal management components and the battery cell assembly located between the thermal management components can be improved by connecting two adjacent thermal management components, thereby improving the stability of the battery device.

[0019] In some embodiments, the size of the housing is L in the third direction; wherein, in the case of 100mm≤L≤600mm and 20mm≤H≤50mm, the first electrode terminal and the second electrode terminal are disposed on the same side of the housing in the third direction.

[0020] By adopting the above technical solution, when the size H of the housing in the second direction is in the range of 20mm to 50mm and the size L of the housing in the third direction is in the range of 100mm to 600mm, the size of the housing is relatively small, thereby allowing the first electrode terminal and the second electrode terminal to be set on the same side of the housing in the third direction.

[0021] In some embodiments, the battery device further includes a housing, in which individual battery cells are housed; in a third direction, there is a gap between the housing and the inner wall of the housing on the side opposite to where the first and second electrode terminals are disposed.

[0022] By adopting the above technical solution, a gap is formed between the side of the outer shell without the first and second electrode terminals in the third direction and the inner wall of the housing. In the event of thermal runaway, the thermal runaway gas can be vented through this gap, thereby achieving the purpose of separating the thermal runaway gas from the first and second electrode terminals.

[0023] In some embodiments, the size of the housing is L in the third direction; wherein, in the case of 600mm < L ≤ 1600mm and 20mm ≤ H ≤ 50mm, the first electrode terminal and the second electrode terminal are respectively disposed on opposite sides of the housing in the third direction.

[0024] By adopting the above technical solution, when the second dimension of the housing is in the range of 20mm to 50mm and the third dimension of the housing is in the range of greater than 600mm and less than or equal to 1600mm, since the length of the housing in the third dimension is relatively long, the first electrode terminal and the second electrode terminal can be set on different sides of the housing in the third dimension to disperse the heat dissipation of the first electrode terminal and the second electrode terminal, thereby improving the heat dissipation efficiency of the first electrode terminal and the second electrode terminal.

[0025] In some embodiments, the size of the housing is L in the third direction; wherein, when 100mm≤L≤1600mm and 50mm≤H≤70mm, the housing is provided with a first electrode terminal and a second electrode terminal on opposite sides in the third direction.

[0026] By adopting the above technical solution, when the size of the housing in the second direction is in the range of 50mm to 70mm and the size of the housing in the third direction is in the range of 100mm to 1600mm, since the size of the housing in the second direction is larger, the first electrode terminal and the second electrode terminal can be provided on opposite sides of the housing in the third direction, so as to effectively reduce the flow path length of the first electrode and the second electrode, thereby reducing the heat generation of the first electrode and the second electrode; at the same time, the heat generation of the first electrode terminal and the second electrode terminal can also be dispersed.

[0027] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0028] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device. On the basis of the higher heat dissipation efficiency of the battery device, the stability of the electrical device is better. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0031] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0032] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0033] Figure 4 Exploded view of the battery cell assembly and thermal management component provided in the embodiments of this application;

[0034] Figure 5 This is a schematic diagram of the structure of the first type of battery cell provided in the embodiments of this application;

[0035] Figure 6 This is a schematic diagram of the structure of the second type of battery cell provided in the embodiments of this application;

[0036] Figure 7 This is a schematic diagram of the structure of the third type of battery cell provided in the embodiments of this application;

[0037] Figure 8 This is a partial structural schematic diagram of the electrode assembly provided in an embodiment of this application.

[0038] The following are the labeling elements in the figure:

[0039] 1000, vehicles;

[0040] 100. Battery device; 110. Battery cell assembly; 200. Controller; 300. Motor;

[0041] 10. Box; 11. First box; 12. Second box;

[0042] 20. Battery cell;

[0043] 210. Outer shell; 21. End cap; 21a. Electrode terminal; 211. First electrode terminal; 212. Second electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab; 231. First electrode plate; 232. Second electrode plate; 233. Isolator;

[0044] 30. Thermal management components; 40. Connectors;

[0045] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0046] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0047] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0051] During the charge-discharge cycle of a battery, the battery generates heat due to excessive current. However, with the increasing demand for shorter charging times, the required charging current is increasing, while the heat exchange time is decreasing; therefore, the battery generates more heat per unit time.

[0052] To alleviate battery overheating, a water-cooled plate can be installed on the battery casing. The coolant in the water-cooled plate exchanges heat with the individual battery cells inside the casing to improve heat dissipation efficiency. However, because the heat conduction path from the electrodes inside the battery cells to the water-cooled plate on the casing is relatively long, the water-cooled plate's improvement in heat dissipation efficiency for the battery cells inside the casing is limited. This can lead to heat accumulation inside the casing, potentially causing thermal runaway.

[0053] Based on the above considerations, to address the issue of heat accumulation inside battery devices, a battery device is designed. This design limits the dimensions of the battery cell casing in the second direction to a value greater than or equal to 20 mm and less than or equal to 70 mm. A thermal management component is positioned on at least one side of the casing in the second direction. By limiting the dimensions of the casing in the distribution direction of the thermal management component, the thermal conductivity distance between the first and second electrodes within the casing and the thermal management component is restricted, reducing the impact of thermal conductivity distance on heat dissipation and thus improving the heat dissipation efficiency of the first and second electrodes within the casing. Simultaneously, the first electrode, separator, and second electrode are sequentially stacked within the casing along the first direction. This allows the multiple layers of first and second electrodes to directly conduct heat to the thermal management component in the second direction through the casing, further enhancing heat dissipation efficiency. Therefore, the probability of heat accumulation inside the battery device is effectively reduced; consequently, the battery device can handle a larger charging current to meet the need for shorter charging times.

[0054] The battery cells disclosed in this application can be used in electrical devices that use battery devices as a power source or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0055] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0056] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may 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, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0057] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0059] In some embodiments, the battery cell assembly 110 is typically formed by arranging a plurality of battery cells 20.

[0060] As an example, the battery cell assembly 110 can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0061] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 110, the battery cell assemblies 110 being housed within the housing 10.

[0062] As an example, the battery cell assembly 110 can be a battery module, and the battery cell assembly 110 can be housed in the housing 10 by fixing the battery module in the housing 10.

[0063] As an example, the battery cell assembly 110 can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0064] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly 110. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0065] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to house the battery cell assembly 110.

[0066] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0067] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after the battery cell has been discharged by recharging to activate the active materials.

[0068] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0069] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3 The battery cell 20 includes a housing 210 (which may include an end cap 21 and a housing 22), an electrode assembly 23, and other functional components.

[0070] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved reliability. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0071] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, 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 housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0072] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The housing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode plates without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery cell 20, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0073] According to some embodiments of this application, refer to Figure 2 , Figure 5 and Figure 8This application provides a battery device 100, including a battery cell 20 and a thermal management component 30. The battery cell 20 includes a housing 210 and a first electrode 231, a second electrode 232, and a separator 233 housed within the housing 210. The first electrode 231 and the second electrode 232 have opposite polarities. The housing 210 has a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other. In the first direction X, the first electrode 231, the separator 233, and the second electrode 232 are alternately stacked. In the second direction Y, the size of the housing 210 is H, where 20mm ≤ H ≤ 70mm. In the third direction Z, a first electrode terminal 211 and a second electrode terminal 212 are provided on the housing 210. The first electrode terminal 211 is electrically connected to the first electrode 231, and the second electrode terminal 212 is electrically connected to the second electrode 232. In the second direction Y, a thermal management component 30 is provided on at least one side of the housing 210. The thermal management component 30 is connected to the housing 210 to regulate the temperature of the battery cell 20.

[0074] The first electrode 231 and the second electrode 232 can react in the electrolyte to generate an electric current. It should be understood that the first electrode 231 and the second electrode 232 have opposite polarities. One of the first electrode 231 and the second electrode 232 has a cathode active material (e.g., lithium iron phosphate, ternary materials, etc.), and the other has an anode active material (e.g., graphite, silicon, etc.). Thus, the cathode active material and the anode active material react in the electrolyte to generate an electric current.

[0075] The first electrode terminal 211 is electrically connected to the first electrode plate 231, through which the first electrode plate 231 can input or output electrical energy; simultaneously, the first electrode terminal 211 can also dissipate heat through thermal radiation. The second electrode terminal 212 is electrically connected to the second electrode plate 232, through which the second electrode plate 232 can input or output electrical energy; simultaneously, the second electrode terminal 212 can also dissipate heat through thermal radiation.

[0076] The separator 233 is used to separate adjacent first electrode 231 and second electrode 232. Optionally, the separator 233 has a structure with better insulation properties, such as an insulating film layer.

[0077] For example, the first electrode 231 can be a cathode electrode with a cathode active material, and the second electrode 232 can be an anode electrode with an anode active material. The first electrode 231, the spacer 233, and the second electrode 232 can be wound to form a wound electrode assembly 23, and the winding axis of the wound electrode assembly 23 (the first electrode 231, the spacer 233, and the second electrode 232 are stacked sequentially and wound around the winding axis) is oriented in the second direction Y; or, the first electrode 231, the spacer 233, and the second electrode 232 can be alternately stacked to form a stacked electrode assembly 23 (e.g., Figure 8 (As shown).

[0078] The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first direction X, the second direction Y, and the third direction Z can be any direction of the outer shell 210, such as the length direction, width direction, height direction, etc. of the outer shell 210. For example, in some embodiments, the first direction X can be the width direction of the outer shell 210, the second direction Y can be the height direction of the outer shell 210, and the third direction Z can be the length direction of the outer shell 210.

[0079] The thermal management component 30 can be used to lower or raise the temperature of the battery cell 20. The thermal management component 30 can be a plate-like structure with internal channels for accommodating a heat exchange medium. The heat exchange medium within the channels can be water, air, a mixture of water and ethylene glycol, a refrigerant, a phase change material, etc., and can be circulated. In other embodiments, the heat exchange medium can also be a solid, for example, paraffin wax; the heat exchange function can be achieved through changes in the state of the heat exchange medium. For example, when paraffin wax changes from solid to liquid, it can absorb heat to cool the battery cell 20. The thermal management component 30 can also be called a water-cooled plate, liquid-cooled plate, heat exchange plate, temperature regulating plate, etc.

[0080] A thermal management component 30 is disposed on one side of the housing 210. The thermal management component 30 can dissipate heat and cool the housing 210 and the first and second electrode plates 232 inside the housing 210 through heat exchange. Exemplarily, in some embodiments, the thermal management component 30 may refer to a liquid cooling plate. A cooling medium flows in the thermal management component 30, and the cooling medium can absorb heat from the housing 210 of the battery cell 20 to achieve the purpose of heat dissipation.

[0081] The first electrode 231, the separator 233, and the second electrode 232 are alternately stacked in the first direction X, meaning that the thickness direction of the first electrode 231 and the second electrode 232 is along the first direction X, and the large-area extension direction of the first electrode 231 and the second electrode 232 can extend along the second direction Y. Therefore, the first electrode 231 and the second electrode 232 can transfer heat to the outer casing 210 along the second direction Y, effectively reducing the impact on heat dissipation efficiency caused by the first electrode 231 and the second electrode 232 needing to pass through multiple stacked layers of the first electrode 231 and the second electrode 232 to transfer heat outward in the first direction X. Simultaneously, the thermal management component 30 is provided on at least one side of the outer casing 210 in the second direction Y; thus, the thermal management component 30 can absorb the heat transferred by the first electrode 231 and the second electrode 232 along the second direction Y, thereby effectively improving heat dissipation efficiency.

[0082] It should be understood that by setting the stacking direction of the first electrode 231 and the second electrode 232 and the setting direction of the thermal management component 30 relative to the housing 210, that is, the first electrode 231 and the second electrode 232 are stacked along the first direction X, and the thermal management component 30 is disposed on at least one side of the housing 210 along the second direction Y; the first electrode 231 and the second electrode 232 can directly transfer heat along the second direction Y to the housing 210, so that the thermal management component 30 can conduct heat in time to achieve the purpose of heat dissipation; thus, the heat dissipation efficiency of the first electrode 231 and the second electrode 232 can be significantly improved.

[0083] Optionally, the thermal management component 30 can be disposed on one side of the housing 210 along the first direction X; or, the thermal management component 30 can be disposed on both opposite sides of the housing 210 along the second direction Y. The thermal management component 30 can be connected and fixed to the housing 210 by means of bonding, snap-fitting, fastener connection, bracket connection, etc.

[0084] In the second direction Y, the size of the outer casing 210 is H, where 20mm ≤ H ≤ 70mm. Here, the size H of the outer casing 210 refers to the distance between one outer surface of the outer casing 210 and the opposite outer surface in the second direction Y.

[0085] In the second direction Y, the dimension H of the housing 210 is defined as greater than or equal to 20 mm and less than or equal to 70 mm; optionally, the dimension H of the housing 210 may be, but is not limited to, 20 mm, 23 mm, 27 mm, 29 mm, 30 mm, 32 mm, 34 mm, 35 mm, 37 mm, 38 mm, 40 mm, 41 mm, 43 mm, 45 mm, 46 mm, 48 mm, 50 mm, 52 mm, 54 mm, 55 mm, 56 mm, 58 mm, 60 mm, 61 mm, 63 mm, 65 mm, 66 mm, 69 mm, 70 mm, etc.

[0086] Understandably, by limiting the size H of the housing 210 in the second direction Y to be greater than or equal to 20 mm and less than or equal to 70 mm, the effect of excessively long heat conduction paths of the first electrode 231 and the second electrode 232 along the second direction Y toward the housing 210 and the thermal management component 30 is reduced.

[0087] On the third direction Z, the housing 210 is provided with a first electrode terminal 211 and a second electrode terminal 212; optionally, the first electrode terminal 211 and the second electrode terminal 212 may be provided on the same side of the housing 210 on the third direction Z; or, the first electrode terminal 211 and the second electrode terminal 212 may be provided on opposite sides of the housing 210 on the third direction Z.

[0088] The battery device 100 provided in this application embodiment limits the dimension H of the outer casing 210 in the second direction Y to be greater than or equal to 20 mm and less than or equal to 70 mm, and provides a thermal management component 30 on at least one side of the outer casing 210 in the second direction Y. Thus, by limiting the dimension of the outer casing 210 in the distribution direction of the thermal management component 30, the thermal conduction distance from the first electrode 231 and the second electrode 232 inside the outer casing 210 to the thermal management component 30 is limited, thereby reducing the impact of the thermal conduction distance on heat dissipation. At the same time, the first electrode 231, the separator 233 and the second electrode 232 are stacked sequentially in the outer casing 210 along the first direction X. Thus, the multilayer first electrode 231 and the second electrode 232 stacked sequentially can conduct heat directly to the thermal management component 30 through the outer casing 210 in the second direction Y, thereby further improving the heat dissipation efficiency.

[0089] Please refer to Figure 4 In some embodiments, in the first direction X, a plurality of battery cells 20 are arranged sequentially to form a battery cell assembly 110, and in the second direction Y, the projection of the battery cell assembly 110 is located on the thermal management component 30.

[0090] Optionally, multiple battery cells 20 refers to two or more battery cells 20. Multiple battery cells 20 may be arranged in a series of abutments; or, a heat insulation layer may be provided between any two adjacent multiple battery cells 20.

[0091] In the second direction Y, the projection of the battery cell assembly 110 is located on the thermal management component 30; thus, the projections of all battery cells 20 in the battery cell assembly 110 in the second direction Y are located on the thermal management component 30, and the outer casing 210 of all battery cells 20 in the battery cell assembly 110 forms contact with the thermal management component 30 for heat dissipation.

[0092] Optionally, a thermal management component 30 may be provided on one side of the battery cell assembly 110 in the second direction Y; or, thermal management components 30 may be provided on both opposite sides of the battery cell assembly 110. For example, when there is one group of battery cell assemblies 110, thermal management components 30 may be provided on one or both sides of the group of battery cell assemblies 110 in the first direction X; when there are two or more groups of battery cell assemblies 110, thermal management components 30 may be provided on at least one side of each group of battery cell assemblies 110 to accelerate heat dissipation.

[0093] With this configuration, multiple battery cells 20 in the battery cell assembly 110 can simultaneously conduct heat to the thermal management component 30, thereby effectively improving the heat dissipation efficiency of the battery cell assembly 110. At the same time, the projection of the battery cell assembly 110 is located on the thermal management component 30, that is, the thermal management component 30 can cover the outer shell 210 of all battery cells 20 in the second direction Y, thereby ensuring the heat dissipation efficiency of the entire battery cell assembly 110.

[0094] Please refer to Figure 4 In some embodiments, the battery cell assembly 110 is arranged in multiple layers along the second direction Y, and a thermal management component 30 is provided between at least two adjacent battery cell assemblies 110.

[0095] Optionally, in the second direction Y, multiple sets of battery cell modules 110 can be arranged to form any multi-layer structure with two, three, or more layers.

[0096] In the multi-layered battery cell assembly 110, a thermal management component 30 may be provided between at least two adjacent battery cell assemblies 110.

[0097] For example, when the battery cell assembly 110 is arranged in two layers in the second direction Y, a thermal management component 30 can be arranged between the two layers of battery cell assembly 110; alternatively, thermal management components 30 can also be arranged on opposite sides of the two layers of battery cell assembly 110 in the second direction Y.

[0098] Alternatively, when the battery cell assembly 110 is arranged in three layers in the second direction Y, a thermal management component 30 may be arranged between two adjacent battery cell assemblies 110, or a thermal management component 30 may be arranged between each adjacent battery cell assembly 110. Optionally, in the second direction Y, thermal management components 30 may also be arranged on the opposite sides of the two outermost battery cell assemblies 110.

[0099] Similarly, when the battery cell assembly 110 is arranged in three or more layers in the second direction Y, the layout of the thermal management component 30 can refer to the layout of the three-layer battery cell assembly 110, and will not be described in detail here.

[0100] With this configuration, the thermal management component 30 located between two adjacent battery cell modules 110 can accelerate the heat dissipation of these two battery cell modules 110, thereby effectively improving the heat dissipation efficiency of the battery cell module 110.

[0101] Please refer to Figure 4 In some embodiments, a thermal management component 30 is provided between adjacent battery cell assemblies 110, and the housings 210 of adjacent battery cell assemblies 110 are all connected to the thermal management component 30.

[0102] In this embodiment, only one thermal management component 30 can be provided between two adjacent battery cell assemblies 110 arranged in the second direction Y. The thermal management component 30 can be used for heat dissipation of the two adjacent battery cell assemblies 20 at the same time.

[0103] Optionally, the thermal management component 30 can be connected to the outer shell 210 of the battery cell 20 in the adjacent two-layer battery cell assembly 110 by means of bonding, snap-fitting, fastener connection, etc.; or, multiple thermal management components 30 located in different layers can be used to clamp and fix the battery cell assembly 110.

[0104] With this configuration, only one thermal management component 30 can be provided between two adjacent battery cell modules 110. The thermal management component 30 can conduct heat to the two adjacent battery cell modules 110 at the same time, and can also improve the compactness between the two adjacent battery cell modules 110, thereby improving the energy density of the battery device 100.

[0105] Please refer to Figure 4 In some embodiments, two thermal management components 30 are provided between adjacent battery cell assemblies 110, and the thermal management components 30 are respectively connected to the housing 210 of the corresponding battery cell assembly 110.

[0106] In this embodiment, two thermal management components 30 can be provided between two adjacent battery cell assemblies 110 arranged in the second direction Y. The two thermal management components 30 can be used for heat dissipation of the battery cell assembly 110 on the corresponding side.

[0107] The two thermal management components 30 can be connected by welding, bonding, fasteners, or other methods; or, the two thermal management components 30 can form an integral structure. The two thermal management components 30 can be connected to the outer shell 210 of the battery cell 20 in the battery cell assembly 110 on the same side by bonding, snapping, fasteners, or other methods. Alternatively, multiple thermal management components 30 of different layers can be connected to clamp and fix the battery cell assembly 110.

[0108] With this configuration, two thermal management components 30 can be set between two adjacent battery cell modules 110. The two thermal management components 30 can be used to conduct heat to the corresponding battery cell module 110, which can effectively improve the heat dissipation efficiency of the battery cell module 110.

[0109] Please refer to Figure 4 In some embodiments, thermal management components 30 are provided on opposite sides of the outer casing 210 of each battery cell assembly 110 in the second direction Y.

[0110] In this embodiment, thermal management components 30 are provided on both sides of the outer shell 210 of each layer of battery cell assembly 110 in the second direction Y; that is, thermal management components 30 are provided between every two adjacent layers of battery cell assembly 110, and thermal management components 30 are provided on the outward-facing side (i.e., the opposite side of the two layers of battery cell assembly 110) located on the outermost opposite layers of battery cell assembly 110 in the second direction Y.

[0111] With this configuration, the heat dissipation area of ​​each layer of battery cell module 110 through the thermal management component 30 is relatively larger, thereby effectively improving the heat dissipation efficiency of each layer of battery cell module 110.

[0112] Please refer to Figure 2 and Figure 4 In some embodiments, in the second direction Y, two adjacent thermal management components 30 are connected by a connector 40.

[0113] Optionally, the connector 40 includes, but is not limited to, structures such as a connecting bracket, a connecting screw, and a connecting block. For example, the connector 40 uses a connecting screw as an example. The connecting screw can pass through two adjacent thermal management components 30 in the second direction Y, and then the position of the thermal management components 30 is locked by using a nut; thus, adjacent thermal management components 30 can be connected and fixed together by the connecting screw.

[0114] It should be understood that when two adjacent thermal management components 30 are connected by a connector 40, the battery cell assembly 110 between the two adjacent thermal management components 30 can be clamped and fixed, so that the two adjacent thermal management components 30 and the battery cell assembly 110 between them can form an integral unit.

[0115] For example, in some embodiments, two sets of battery cell assemblies 110 are arranged sequentially in the second direction Y, and a thermal management component 30 is provided between the two sets of battery cell assemblies 110. At the same time, a thermal management component 30 is also provided on the opposite side of the two sets of battery cell assemblies 110. The three-layer thermal management component 30 can be connected in pairs by connectors 40 to form a fixed structure. At the same time, the two-layer battery cell assemblies 110 are respectively sandwiched and fixed between the first and second layers and between the second and third layers of the three-layer thermal management component 30. Thus, the three-layer thermal management component 30 and the two-layer battery cell assemblies 110 can be combined to form an integral structure.

[0116] By connecting two adjacent thermal management components 30, the stability of the thermal management components 30 and the battery cell assembly 110 located between the thermal management components 30 can be improved, thereby improving the stability of the battery device 100.

[0117] Please refer to Figure 4 , Figure 5 and Figure 8 In some embodiments, the size of the housing 210 is L in the third direction Z; wherein, in the case that 100mm≤L≤600mm and 20mm≤H≤50mm, the first electrode terminal 211 and the second electrode terminal 212 are disposed on the same side of the housing 210 in the third direction Z.

[0118] Wherein, the dimension L of the outer shell 210 refers to the distance between one outer surface of the outer shell 210 and the opposite outer surface in the third direction Z.

[0119] On the third-party direction Z, the size L of the housing 210 is defined as greater than or equal to 100 mm and less than or equal to 600 mm; alternatively, the size L of the housing 210 may be, but is not limited to, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, etc.

[0120] In the second direction Y, the dimension H of the housing 210 is defined as greater than or equal to 20 mm and less than or equal to 50 mm; optionally, the dimension H of the housing 210 may be, but is not limited to, 20 mm, 21 mm, 23 mm, 25 mm, 26 mm, 29 mm, 30 mm, 32 mm, 33 mm, 35 mm, 36 mm, 38 mm, 40 mm, 41 mm, 42 mm, 44 mm, 45 mm, 47 mm, 48 mm, 50 mm, etc.

[0121] Understandably, in this embodiment, the dimension L of the housing 210 in the third direction Z is greater than or equal to 100 mm and less than or equal to 700 mm, and the dimension H of the housing 210 in the second direction Y is in the range of 20 mm to 50 mm. Based on this, the dimension L of the housing 210 in the third direction Z is relatively small, and the current path for the first electrode 231 and the second electrode 232 to input or output electrical energy through the first electrode terminal 211 and the second electrode terminal 212 is relatively short. Therefore, the first electrode terminal 211 and the second electrode terminal 212 can be disposed on the same side of the housing 210 in the third direction Z.

[0122] With this configuration, the size of the housing 210 is relatively small, with the dimension H of the second direction Y ranging from 20mm to 50mm and the dimension L of the third direction Z ranging from 100mm to 600mm. This allows the first electrode terminal 211 and the second electrode terminal 212 to be placed on the same side of the housing 210 in the third direction Z, and the heat dissipation efficiency of the first electrode plate 231 and the second electrode plate 232 can basically meet the requirements.

[0123] It should be understood that, based on the dimensions of the housing 210 defined in this embodiment, the first electrode terminal 211 and the second electrode terminal 212 may also be respectively disposed on opposite sides of the housing 210 in the third direction Z.

[0124] Please refer to Figure 4 and Figure 5 In some embodiments, the battery device 100 further includes a housing 10, in which the battery cell 20 is housed; in the third direction Z, the housing 210 has a gap (not shown) between the side of the housing 210 opposite to the side where the first electrode terminal 211 and the second electrode terminal 212 are disposed and the inner wall of the housing 10.

[0125] With this configuration, a gap is formed between the side of the outer casing 210 in the third direction Z where the first electrode terminal 211 and the second electrode terminal 212 are not provided and the inner wall of the housing 10. In the event of thermal runaway, the thermal runaway gas can be vented through this gap, thereby achieving the purpose of separating the thermal runaway gas from the first electrode terminal 211 and the second electrode terminal 212.

[0126] Please refer to Figure 4 , Figure 6 and Figure 8 In some embodiments, the size of the housing 210 in the third direction Z is L; wherein, when 600mm < L ≤ 1600mm and 20mm ≤ H ≤ 50mm, the first electrode terminal 211 and the second electrode terminal 212 are respectively disposed on opposite sides of the housing 210 in the third direction Z.

[0127] On the third-party Z, the dimension L of the housing 210 is defined as greater than 600mm and less than or equal to 1600mm; optionally, the dimension L of the housing 210 may be, but is not limited to, 610mm, 650mm, 700mm, 750mm, 800mm, 850mm, 900mm, 950mm, 1000mm, 1050mm, 1100mm, 1150mm, 1200mm, 1250mm, 1300mm, 1350mm, 1400mm, 1450mm, 1500mm, 1550mm, 1600mm, etc.

[0128] In the second direction Y, the dimension H of the housing 210 is defined as greater than or equal to 20 mm and less than or equal to 50 mm; optionally, the dimension H of the housing 210 may be, but is not limited to, 20 mm, 21 mm, 23 mm, 25 mm, 26 mm, 29 mm, 30 mm, 32 mm, 33 mm, 35 mm, 36 mm, 38 mm, 40 mm, 41 mm, 42 mm, 44 mm, 45 mm, 47 mm, 48 mm, 50 mm, etc.

[0129] Understandably, in this embodiment, the dimension L of the outer casing 210 in the third direction Z is greater than 600 mm and less than or equal to 1600 mm, and the dimension H of the outer casing 210 in the second direction Y is between 20 mm and 50 mm. Based on this, the dimension L of the outer casing 210 in the third direction Z is relatively large. When the first electrode terminal 211 and the second electrode terminal 212 are located on the same side of the outer casing 210 in the third direction Z, the current path for the first electrode plate 231 and the second electrode plate 232 to input or output electrical energy through the first electrode terminal 211 and the second electrode terminal 212 is relatively long. Therefore, the heat generated by the first electrode plate 231 and the second electrode plate 232 will be relatively large.

[0130] Therefore, by distributing the first electrode terminal 211 and the second electrode terminal 212 on opposite sides of the housing 210 in the third direction Z, the first electrode terminal 211 and the second electrode terminal 212 can respectively dissipate heat through thermal radiation on opposite sides of the housing 210, thereby improving the heat dissipation efficiency of the first electrode terminal 211 and the second electrode terminal 212.

[0131] With this configuration, when the dimension of the housing 210 in the second direction Y is in the range of 20mm to 50mm, and the dimension of the housing 210 in the third direction Z is greater than 600mm and less than or equal to 1600mm, since the length of the housing 210 in the third direction Z is relatively long, the first electrode terminal 211 and the second electrode terminal 212 can be placed on different sides of the housing 210 in the third direction Z to disperse the heat of the first electrode terminal 211 and the second electrode terminal 212, thereby improving the heat dissipation efficiency of the first electrode terminal 211 and the second electrode terminal 212.

[0132] It should be understood that, based on the dimensions of the housing 210 defined in this embodiment, the number of electrode terminals can be increased on the housing 210. For example, in the third direction Z, first electrode terminals 211 and second electrode terminals 212 can be simultaneously provided on opposite sides of the housing 210; by adding electrode terminals, the ability of the first electrode plate 231 and the second electrode plate 232 to input or output current is improved, thereby reducing impedance and heat generation, and at the same time, the heat generated by each electrode terminal can be dispersed.

[0133] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, the size of the housing 210 is L in the third direction Z; wherein, when 100mm≤L≤1600mm and 50mm≤H≤70mm, the housing 210 is provided with a first electrode terminal 211 and a second electrode terminal 212 on opposite sides in the third direction Z.

[0134] On the third-party direction Z, the dimension L of the housing 210 is defined as greater than or equal to 100 mm and less than or equal to 1600 mm; optionally, the dimension L of the housing 210 may be, but is not limited to, 100 mm, 150 mm, 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm, 500 mm, 550 mm, 600 mm, 650 mm, 700 mm, 750 mm, 800 mm, 850 mm, 900 mm, 950 mm, 1000 mm, 1050 mm, 1100 mm, 1150 mm, 1200 mm, 1250 mm, 1300 mm, 1350 mm, 1400 mm, 1450 mm, 1500 mm, 1550 mm, 1600 mm, etc.

[0135] In the second direction Y, the dimension H of the housing 210 is defined as greater than or equal to 20 mm and less than or equal to 50 mm; optionally, the dimension H of the housing 210 may be, but is not limited to, 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, 59 mm, 60 mm, 61 mm, 62 mm, 63 mm, 64 mm, 65 mm, 66 mm, 67 mm, 68 mm, 69 mm, 70 mm, etc.

[0136] Understandably, in this embodiment, the dimension L of the outer casing 210 in the third direction Z is greater than or equal to 100 mm and less than or equal to 1600 mm, and the dimension H of the outer casing 210 in the second direction Y is in the range of 50 mm to 70 mm. Based on this, the dimension H of the outer casing 210 in the second direction Y is relatively large, and the distance between the first electrode 231 and the second electrode 232 and the thermal management component 30 in the second direction Y is also larger, resulting in relatively poor heat dissipation effect of the first electrode 231 and the second electrode 232.

[0137] Therefore, by simultaneously providing first electrode terminals 211 and second electrode terminals 212 on opposite sides of the housing 210 along the third direction Z, the first electrode 231 can simultaneously pass through the first electrode terminals 211 at opposite ends of the housing 210 along the third direction Z, and the second electrode 232 can simultaneously pass through the second electrode terminals 212 at opposite ends of the housing 210 along the third direction Z. The impedance of the first electrode 231 and the second electrode 232 is reduced, and the heat generated by the first electrode 231 and the second electrode 232 is also reduced.

[0138] When the dimension of the housing 210 in the second direction Y is in the range of 50mm to 70mm and the dimension of the housing 210 in the third direction Z is in the range of 100mm to 1600mm, since the size of the housing 210 in the second direction Y is relatively large, the first electrode terminal 211 and the second electrode terminal 212 can be provided on both opposite sides of the housing 210 in the third direction Z. The first electrode plate 231 and the second electrode plate 232 can simultaneously carry current along their opposite ends in the third direction Z, so as to effectively reduce the current path length of the first electrode plate 231 and the second electrode plate 232, thereby reducing the heat generation of the first electrode plate 231 and the second electrode plate 232; at the same time, the heat of the first electrode terminal 211 and the second electrode terminal 212 can also be dispersed.

[0139] The battery device 100 provided in the embodiments of this application will now be described in detail according to specific implementation methods.

[0140] Please refer to Figures 2 to 8In this embodiment, the battery device 100 includes a battery cell 20 and a thermal management component 30. The battery cell 20 includes a housing 210 and a first electrode 231, a second electrode 232, and a separator 233 housed within the housing 210. The first electrode 231 and the second electrode 232 have opposite polarities. In the first direction X, the first electrode 231, the separator 233, and the second electrode 232 are alternately stacked. In the second direction Y, the size of the housing 210 is H, where 20mm ≤ H ≤ 70mm. In the third direction Z, the housing 210 is provided with a first electrode terminal 211 and a second electrode terminal 212. The first electrode terminal 211 is electrically connected to the first electrode 231, and the second electrode terminal 212 is electrically connected to the second electrode 232.

[0141] In this embodiment, the first direction X is the width direction of the outer shell 210, the second direction Y is the height direction of the outer shell 210, and the third direction Z is the length direction of the outer shell 210, as an example for explanation.

[0142] In the first direction X, multiple battery cells 20 are arranged sequentially to form a battery cell assembly 110, and in the second direction Y, the projection of the battery cell assembly 110 is located on the thermal management component 30.

[0143] The battery cell assembly 110 is arranged in multiple layers along the second direction Y; exemplaryly, in this embodiment, the battery cell assembly 110 is arranged in two layers along the second direction Y for description. A thermal management component 30 is provided between each of the two battery cell assemblies 110 layers, and thermal management components 30 are also provided on the opposite surfaces of the two battery cell assemblies 110 layers. Thus, the two battery cell assemblies 110 layers and the three thermal management components 30 distributed thereon are connected and fixed by adjacent thermal management components 30 through connectors 40, such that the three thermal management components 30 respectively sandwich the two battery cell assemblies 110 layers at intervals on the inner side, and the three thermal management components 30 and the two battery cell assemblies 110 layers form an integral unit.

[0144] Please refer to Figure 1 and Figure 2 This application embodiment also provides an electrical device, including the battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0145] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above. The electrical device includes the battery device 100 described above. Based on the higher heat dissipation efficiency of the battery device 100, the stability of the electrical device is better.

[0146] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that: include A battery cell, the battery cell including a housing and a first electrode, a second electrode and a separator housed within the housing, the first electrode and the second electrode having opposite polarities, and the housing having a first direction, a second direction and a third direction that are perpendicular to each other; In the first direction, the first electrode, the separator, and the second electrode are alternately stacked; In the second direction, the size of the outer casing is H, where 20mm ≤ H ≤ 70mm; In the third direction, the outer casing is provided with a first electrode terminal and a second electrode terminal, the first electrode terminal being electrically connected to the first electrode plate, and the second electrode terminal being electrically connected to the second electrode plate; as well as A thermal management component is provided on at least one side of the housing in the second direction, and the thermal management component is connected to the housing to regulate the temperature of the battery cell.

2. The battery device according to claim 1, characterized in that: In the first direction, a plurality of battery cells are arranged sequentially to form a battery cell assembly, and in the second direction, the projection of the battery cell assembly is located on the thermal management component.

3. The battery device according to claim 2, characterized in that: The battery cell assembly is arranged in multiple layers along the second direction, and the thermal management component is disposed between at least two adjacent battery cell assemblies.

4. The battery device according to claim 3, characterized in that: A thermal management component is provided between adjacent battery cell assemblies, and the housings of adjacent battery cell assemblies are all connected to the thermal management component.

5. The battery device according to claim 3, characterized in that: Two thermal management components are disposed between adjacent battery cell assemblies, and the thermal management components are respectively connected to the housing of the corresponding battery cell assembly.

6. The battery device according to claim 3, characterized in that: In the second direction, the thermal management components are provided on opposite sides of the outer casing of each layer of the battery cell assembly.

7. The battery device according to claim 1, characterized in that: In the second direction, two adjacent thermal management components are connected by a connector.

8. The battery device according to any one of claims 1 to 7, characterized in that: In the third direction, the size of the housing is L; wherein, in the case of 100mm≤L≤600mm and 20mm≤H≤50mm, the first electrode terminal and the second electrode terminal are disposed on the same side of the housing in the third direction.

9. The battery device according to claim 8, characterized in that: The battery device also includes a housing, in which the individual battery cells are housed; In the third direction, there is a gap between the outer casing and the inner wall of the housing on the side opposite to where the first electrode terminal and the second electrode terminal are disposed.

10. The battery device according to any one of claims 1 to 7, characterized in that: In the third direction, the size of the housing is L; wherein, when 600mm < L ≤ 1600mm and 20mm ≤ H ≤ 50mm, the first electrode terminal and the second electrode terminal are respectively disposed on opposite sides of the housing in the third direction.

11. The battery device according to any one of claims 1 to 7, characterized in that: In the third direction, the size of the housing is L; wherein, when 100mm≤L≤1600mm and 50mm≤H≤70mm, the housing is provided with the first electrode terminal and the second electrode terminal on opposite sides in the third direction.

12. An electrical device, characterized in that: Includes the battery device as described in any one of claims 1 to 11, the battery device being used to provide electrical energy.

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