Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises at least one battery monomer, a box body and a heat management component, and the battery monomer is arranged in the box body; the heat management part is arranged in the box body, and the heat management part and the battery monomers are arranged along a first direction; the heat management component is provided with a plurality of channels, and the channels extend in the second direction; in the third direction, at least one of the two channels located on the outermost side in the multiple channels is configured to be a closed channel into which a heat exchange medium is not introduced, at least one of the other channels is used for introducing the heat exchange medium to adjust the temperature of the battery monomers, and the first direction, the second direction and the third direction intersect in pairs.

Description

Technical Field

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

[0002] With increasing environmental pollution, the new energy industry is attracting more and more attention. Within the new energy industry, battery technology is a crucial factor in its development.

[0003] In related technologies, battery devices include thermal management components. The temperature of individual battery cells is regulated by introducing a heat exchange medium into the thermal management components. However, the existing thermal management components have unreasonable structural designs, which makes it easy for the heat exchange medium in the thermal management components to leak, thus affecting the performance of the battery device. Utility Model Content

[0004] The main objective of this invention is to provide a battery device and an electrical device that optimizes the structure of the battery device to reduce the risk of heat exchange medium leakage in the thermal management components.

[0005] This application provides a battery device, which includes at least one battery cell, a housing, and a thermal management component. The battery cell is disposed within the housing. The thermal management component is disposed within the housing, and the thermal management component and the battery cell are arranged along a first direction. The thermal management component has multiple channels that extend along a second direction. Along a third direction, at least one of the two outermost channels is configured as a closed channel through which no heat exchange medium is introduced, and at least one of the remaining channels is used to introduce a heat exchange medium to regulate the temperature of the battery cell. The first direction, the second direction, and the third direction intersect each other.

[0006] In the technical solution of this application embodiment, the thermal management component has multiple channels, at least one of which is used to introduce a heat exchange medium to regulate the temperature of the battery cell; along a third direction, at least one of the two outermost channels is configured as a closed channel without heat exchange medium. The specific direction of the third direction is not limited, for example, but not limited to the height direction of the battery device. In the height direction of the battery device, the uppermost channel and / or the lowermost channel of the thermal management component are closed channels without heat exchange medium. The closed channels without heat exchange medium form cavities. That is, the outermost flow channel of the thermal management component is a cavity. When the outermost cavity of the thermal management component is broken due to external force, there is no leakage of heat exchange medium in the cavity, thus reducing the risk of heat exchange medium leakage in the thermal management component. For example, when a battery cell experiences thermal runaway, if the heat resistance of the thermal management component is lower than the temperature of the ejected material from the battery cell, the ejected material may burn through the top of the thermal management component, causing leakage of the heat exchange medium in the uppermost channel. The technical solution of this application designates the uppermost channel of the thermal management component as a cavity, thus reducing the risk of heat exchange medium leakage. Similarly, when the bottom of the battery device is impacted, if the bottom of the thermal management component deforms and cracks, it may cause leakage of the heat exchange medium in the lowermost channel. The technical solution of this application also designates the lowermost channel of the thermal management component as a cavity, thus reducing the risk of heat exchange medium leakage. Therefore, the technical solution of this application optimizes the structure of the battery device and reduces the risk of heat exchange medium leakage in the thermal management component.

[0007] In some embodiments, the closed channel without heat exchange medium forms a cavity, and the channel with heat exchange medium forms a flow channel. The thermal management component includes multiple cavities and multiple flow channels. The multiple cavities and multiple flow channels are arranged alternately along the third direction; and / or, the multiple flow channels are located between the two outermost cavities along the third direction. In this embodiment, the cavities help reduce the weight of the thermal management component and also act as a buffer. When the thermal management component deforms under pressure, the cavities can absorb the expansion force of the battery cells. Multiple cavities also help reduce the total weight of the heat exchange medium within the thermal management component, achieving a lightweight effect. Furthermore, the alternating arrangement of multiple cavities and multiple flow channels helps improve the uniformity of heat exchange medium distribution and improve heat exchange performance. The multiple flow channels located between the two outermost cavities reduce the risk of heat exchange medium leakage due to flow channel rupture caused by external forces on the outer side of the thermal management component, thus improving the safety of the battery device.

[0008] In some embodiments, the third direction is the height direction of the battery device; the top of the thermal management component is provided with a heat insulation layer; and / or, the bottom of the thermal management component is provided with a reinforcing member. In this embodiment, the heat insulation layer can withstand high temperatures, ensuring that the top of the thermal management component will not be burned through by high-temperature ejected material during thermal runaway of a single battery cell, and preventing heat diffusion caused by leakage of the heat exchange medium inside the thermal management component. The reinforcing member increases the structural strength of the bottom of the thermal management component, ensuring that the bottom of the thermal management component will not crack due to external impact, and reducing the risk of internal insulation failure of the housing caused by leakage of the heat exchange medium inside the thermal management component.

[0009] In some embodiments, the channel includes multiple deflection sub-channels arranged sequentially along the second direction, with at least a portion of the deflection sub-channels extending at an angle relative to the second direction. In this embodiment, the inclined extension of at least a portion of the deflection sub-channels along the second direction increases the flow path length of the heat exchange medium, resulting in a longer heat exchange time between the heat exchange medium and the battery cells, thus improving the heat exchange capacity. Furthermore, the multiple deflection sub-channels facilitate more uniform temperature regulation of the battery cells by the heat exchange medium, preventing localized overheating or undercooling of the battery cells due to uneven flow distribution in traditional parallel flow channels. The multiple channels also allow the heat exchange medium to fully cover the battery cells in the height direction, improving the uniformity of heat exchange between the heat exchange medium and the battery cells in the thermal management component.

[0010] In some embodiments, the angle formed between the extension direction of at least a portion of the deflection sub-channel and the second direction is greater than or equal to 10° and less than or equal to 80°. In this embodiment, the appropriate angle between the extension direction of the deflection sub-channel and the second direction is beneficial for enhancing the turbulence of the heat exchange medium within the deflection sub-channel, thereby improving heat exchange efficiency. If the angle between the extension direction of the deflection sub-channel and the second direction is too small, the heat exchange medium will still flow nearly parallel, resulting in weak turbulence; if the angle between the extension direction of the deflection sub-channel and the second direction is too large, the resistance to the flow of the heat exchange medium will be large, leading to excessive pressure drop and affecting the smoothness of the heat exchange medium flow.

[0011] In some embodiments, the deflection points of the deflection sub-channels are curved or bent; and / or, multiple segments of the deflection sub-channels are sequentially connected. In this embodiment, the deflection points of the deflection sub-channels are curved to avoid abrupt changes in the flow direction of the heat exchange medium, reducing the flow resistance of the heat exchange medium and thus improving heat exchange efficiency. The bent deflection points of the deflection sub-channels facilitate processing and manufacturing, thereby reducing the manufacturing cost of the thermal management components. The sequential connection of multiple deflection sub-channels makes the channel structure regular, facilitating processing and manufacturing, and further reducing manufacturing costs.

[0012] In some embodiments, the channel further includes a buffer sub-channel, and adjacent segments of the deflection sub-channel are connected via the buffer sub-channel along the second direction. In this embodiment, connecting two adjacent deflection sub-channels via the buffer sub-channel can reduce the flow resistance of the heat exchange medium at the connection point of the two adjacent deflection sub-channels, allowing the heat exchange medium to transition smoothly and reducing kinetic energy loss.

[0013] In some embodiments, at least a portion of the buffer sub-channel extends along the second direction. This arrangement ensures that when the heat exchange medium flows through the buffer sub-channel, at least a portion of the heat exchange medium flows along the second direction, which is the direction in which the channel extends; that is, at least a portion of the heat exchange medium flows in a parallel direction. This facilitates increasing the flow velocity of the heat exchange medium through the buffer sub-channel, thereby improving the fluidity of the heat exchange medium flowing through the thermal management components.

[0014] In some embodiments, the closed channel without heat exchange medium forms a cavity, and the channel with heat exchange medium forms a flow channel. The thermal management component includes a plurality of cavities and a plurality of flow channels arranged along the third direction. At least one cavity is provided between two adjacent flow channels, and the projection portions of two adjacent flow channels overlap along the second direction. In this embodiment, the cavity helps to reduce the weight of the thermal management component and also serves as a buffer. When the thermal management component deforms under pressure, the cavity can absorb the expansion force of the battery cell. The multiple cavities also help to reduce the total weight of the heat exchange medium in the thermal management component, achieving a lightweight effect. Furthermore, the cavity between two adjacent flow channels and the overlapping projection portions of the two adjacent flow channels, i.e., the projection of the two adjacent flow channels covers the projection of the cavity located between them, allows the heat exchange medium in the multiple flow channels to fully cover the battery cell in the height direction, thereby improving the uniformity of heat exchange between the heat exchange medium and the battery cell in the thermal management component.

[0015] In some embodiments, the thermal management component includes a heat exchanger, a current collector, and a sealing element. The heat exchanger has multiple channels. The current collector is located at both ends of the heat exchanger and has a cavity and a through hole. The through hole connects the cavity and one of the channels to form a flow channel for the introduction of the heat exchange medium. The sealing element is located at both ends of one of the channels and seals the end openings of the channel to form a closed channel that does not allow the introduction of the heat exchange medium. In this embodiment, the channel is connected to the cavity via the through hole to form a flow channel; the end openings at both ends of the channel are sealed by the sealing element to form a closed channel. By sealing with the sealing element, a stable sealing effect is achieved. The closed channel is a cavity, which helps to reduce the weight of the thermal management component and can also act as a buffer. When the thermal management component is compressed and deformed, the cavity can absorb the expansion force of the battery cells. Multiple cavities also help to reduce the total weight of the heat exchange medium inside the thermal management component, achieving a lightweight effect. In this embodiment, the thermal management component can reduce the heat exchange medium capacity within the thermal management component without changing the contact area with the battery cell, so that the heat exchange component can provide stable support, constraint and anti-deformation effect for the battery cell.

[0016] In some embodiments, the heat exchanger has an inner cavity and a plurality of partitions disposed in the inner cavity, the plurality of partitions dividing the inner cavity into a plurality of channels; the partitions include multiple deflection partitions, the plurality of deflection partitions are arranged sequentially along the second direction, at least a portion of the deflection partitions are inclined relative to the second direction, and adjacent two deflection partitions are spaced apart along the third direction to form a deflection sub-channel, the channel having multiple deflection sub-channels. In this embodiment, the partition includes multiple deflection partitions, and a deflection sub-channel is formed by spaced apart two adjacent deflection partitions, which simplifies the formation of the deflection sub-channel and facilitates manufacturing; the deflection sub-channel increases the flow path length of the heat exchange medium, making the heat exchange time between the heat exchange medium and the battery cell longer, thus improving the heat exchange capacity; furthermore, the multiple deflection sub-channels also facilitate the heat exchange medium to more uniformly regulate the temperature of the battery cell, preventing local overheating or undercooling of the battery cell due to uneven flow distribution in traditional parallel flow channels.

[0017] In some embodiments, the separator further includes a buffer partition; along the second direction, two adjacent deflection partitions are connected via the buffer partition. In this embodiment, by providing a buffer partition, it is beneficial to reduce the flow resistance of the heat exchange medium flowing through the buffer partition, so that the heat exchange medium can transition smoothly when flowing through the buffer partition, reducing kinetic energy loss.

[0018] This application also proposes an electrical device that includes a battery device for storing or providing electrical energy.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0022] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0023] Figure 3 This is a partial structural schematic diagram of a battery device according to some embodiments of this application;

[0024] Figure 4 This is a partial structural schematic diagram of the first embodiment of the thermal management component of this application;

[0025] Figure 5 This is a schematic diagram of the structure of the second embodiment of the thermal management component of this application;

[0026] Figure 6 for Figure 5 A schematic diagram of the structure after structural decomposition;

[0027] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0028] Figure 8 This is a cross-sectional view of a portion of the structure of the thermal management component of the third embodiment of this application;

[0029] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0030] Figure 10 This is a cross-sectional view of the third embodiment of the thermal management component of this application;

[0031] Figure 11 for Figure 10 Enlarged view of point C in the middle;

[0032] Figure 12This is a cross-sectional view of the fourth embodiment of the thermal management component of this application;

[0033] Figure 13 for Figure 12 Enlarged view at point D;

[0034] Figure 14 This is a cross-sectional view of the fifth embodiment of the thermal management component of this application;

[0035] Figure 15 for Figure 14 Enlarged view of point E in the middle.

[0036] Explanation of icon numbers:

[0037] 1. Vehicles;

[0038] 10. Battery device;

[0039] 100. Battery cell; 110. Electrode terminal;

[0040] 200. Box body; 210. First part; 220. Second part;

[0041] 300. Thermal management component; 301. Heat exchanger; 302. Manifold; 303. Sealing component; 310. Channel; 311. Enclosed channel; 312. Deflector sub-channel; 313. Buffer sub-channel; 320. Cavity; 330. Flow channel; 340. Separator; 341. Deflector partition; 342. Buffer partition;

[0042] 20. Controller;

[0043] 30. Motor.

[0044] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0046] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] With the widespread application of batteries in energy storage power systems, electric vehicles, and other fields, such as energy storage power systems including hydropower, wind power, thermal power, and solar power plant energy storage systems; and electric vehicles including electric cars, electric motorcycles, and electric bicycles, people are paying particular attention to battery technology.

[0050] The individual cells in a battery device exhibit different electrical cycle performance under different ambient temperatures. When the ambient temperature is too high or too low, the electrical cycle performance of the individual cells will decrease, and may even shorten their lifespan. In order to ensure the safe and stable operation of the individual cells, effective thermal management is required to control the individual cells to operate within a suitable temperature range.

[0051] To address the thermal management issues of individual battery cells, heat exchange components can be installed inside the battery device, such as, but not limited to, cooling plates. The cooling plates can be located on one side of multiple battery cells, and channels for the flow of cooling medium are formed inside the cooling plates, thereby cooling the battery cells.

[0052] In related technologies, battery devices include thermal management components. The temperature of individual battery cells is regulated by introducing a heat exchange medium into the thermal management component. However, existing thermal management components have unreasonable structural designs, leading to easy leakage of the heat exchange medium and affecting the performance of the battery device. For example, but not limited to, the thermal management component has multiple channels for the flow of the heat exchange medium. When the thermal management component is subjected to external forces, the outermost channel is prone to rupture. This rupture leads to leakage of the heat exchange medium within the channel, thereby affecting the performance of the battery device.

[0053] Based on the above considerations, in order to solve the problem of easy leakage of heat exchange medium caused by unreasonable structural design of thermal management components in existing battery devices, this application proposes a new battery device that optimizes the structure of thermal management components and reduces the risk of leakage of heat exchange medium in thermal management components.

[0054] Furthermore, the aforementioned battery device may include multiple battery cells. These battery cells can be secondary or primary batteries, and can also be lithium-sulfur, sodium-ion, or magnesium-ion batteries, but are not limited to these. The shape of the battery cell can be cylindrical, flat, cuboid, or other shapes, and this application does not specifically limit the shape of the battery cell. Multiple battery cells can be connected in series, in parallel, or in a hybrid configuration of both series and parallel connections. Several battery cells connected in series, parallel, or in a hybrid configuration can form a battery module.

[0055] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is 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.

[0056] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0057] Please see Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1 provided in some embodiments of this application. Vehicle 1 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 10 is installed inside vehicle 1, and the battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, the battery device 10 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to supply power to the motor 30, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0058] In some embodiments of this application, the battery device can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0059] Please see Figure 2 , Figure 2 This is an exploded view of a battery device 10 provided in some embodiments of this application. The battery device 10 includes a battery cell 100 and a housing 200, with the battery cell 100 housed within the housing 200. The housing 200 provides space for the battery cell 100, and the housing 200 can have various structures.

[0060] In some embodiments, the housing 200 may include a first portion 210 and a second portion 220, which overlap each other, and together define a receiving space for accommodating the battery cell 100. The second portion 220 may be a hollow structure with one open end, and the first portion 210 may be a plate-like structure, with the first portion 210 covering the open side of the second portion 220 so that the first portion 210 and the second portion 220 together define the receiving space; alternatively, the first portion 210 and the second portion 220 may both be hollow structures with one open side, with the open side of the first portion 210 covering the open side of the second portion 220. Of course, the housing 200 formed by the first portion 210 and the second portion 220 may be of various shapes, such as a cylinder, a cuboid, etc.

[0061] In a battery device, there can be multiple battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these battery cells is housed within a casing. Alternatively, the battery device can consist of multiple battery cells first connected in series, parallel, or a combination thereof to form battery modules, and then these modules are connected in series, parallel, or a combination thereof to form a whole, which is also housed within a casing. The battery device may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0062] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated current collector protrudes beyond the coated current collector. These uncoated current collectors are stacked together to form the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated current collector protrudes beyond the coated current collector. These uncoated current collectors are stacked together to form the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of this application are not limited thereto.

[0063] The battery device in the embodiments of this application can be used in electrical devices such as vehicles, or can be installed in electrical devices that require an electrical box.

[0064] The structures in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0065] Please see Figures 3 to 7In one embodiment of this application, a battery device 10 is provided. The battery device 10 includes at least one battery cell 100, a housing 200, and a thermal management component 300. The battery cell 100 is disposed within the housing 200. The thermal management component 300 is disposed within the housing 200, and the thermal management component 300 and the battery cell 100 are arranged along a first direction. The thermal management component 300 has a plurality of channels 310, which extend along a second direction. Along a third direction, at least one of the two outermost channels 310 is configured as a closed channel 311 through which no heat exchange medium is introduced, and at least one of the remaining channels 310 is used to introduce a heat exchange medium to regulate the temperature of the battery cell 100. The first direction, the second direction, and the third direction intersect each other.

[0066] The battery cell 100 includes a housing, end caps, electrode assemblies, and other functional components. The end cap is a component that closes onto the opening of the housing to isolate the internal environment of the battery cell 100 from the external environment. The shape of the end cap can be adapted to the shape of the housing to fit the housing. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easily deformed under pressure or impact, giving the battery cell 100 higher structural strength and improving reliability. Functional components such as electrode terminals 110 and pressure relief mechanisms can be provided on the end cap. The electrode terminals 110 can be used for electrical connection with the electrode assemblies to output or input electrical energy to the battery cell 100. In some embodiments, the pressure relief mechanism is used to release internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold. The end cap can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element can also be provided on the inner side of the end cap to reduce the risk of short circuits. For example, the insulating element can be made of plastic, rubber, etc.

[0067] The thermal management component 300 refers to a component disposed within the housing 200 of the battery assembly 10, used to contain a heat exchange medium to regulate the temperature of the battery cells 100 within the housing 200. During the cycling process, the battery cells 100 generate heat, which can be cooled by the thermal management component 300. In this case, the thermal management component 300 can contain the heat exchange medium; it can also be referred to as a cooling element, cooling system, cooling plate, or liquid cooling plate, etc. Of course, in some other cases, the thermal management component 300 can also be used to heat the battery cells 100, which will not be elaborated upon here.

[0068] The thermal management component 300 and the battery cell 100 are arranged along a first direction. The specific direction of the first direction is not limited, for example but not limited to: the first direction is the length direction of the battery device 10; or, the first direction is the width direction of the battery device 10; or, the first direction is the thickness direction of the thermal management component 300.

[0069] The extension of channel 310 along the second direction means that channel 310 is treated as a whole and extends from one end of thermal management component 300 to the other end. The specific direction of the second direction is not limited, for example but not limited to: the second direction is the width direction of battery device 10; or, the second direction is the length direction of battery device 10; or, the second direction is the length direction of thermal management component 300.

[0070] The first direction, the second direction, and the third direction intersect each other and form an angle. The size of the angle can be acute, right, or obtuse, and is not limited here. For example, but not limited to, the first direction, the second direction, and the third direction are perpendicular to each other. The specific direction of the third direction is not limited, for example, but not limited to, the third direction being the height direction of the battery device 10; or, the third direction being the width direction of the thermal management component 300. Of course, in other embodiments, the third direction can also be a horizontal direction.

[0071] For easier explanation, please refer to [link / reference]. Figures 2 to 6 In this embodiment, the first direction is the width direction Y of the battery device 10, the second direction is the length direction X of the battery device 10, and the third direction is the height direction Z of the battery device 10. The first direction Y, the second direction X, and the third direction Z are all perpendicular to each other. The first direction can also be the thickness direction of the thermal management component 300, the second direction can also be the length direction of the thermal management component 300, and the third direction can also be the width direction of the thermal management component 300. The dashed arrows in the accompanying drawings indicate the flow direction of the heat exchange medium.

[0072] In one embodiment, the thermal management component 300 and the battery cell 100 are arranged adjacent to each other along the width direction of the battery device 10. The heat exchange efficiency is improved by contacting the larger sidewall of the thermal management component 300 with the larger side of the battery cell 100. Of course, the battery cell 100 can also be located between two adjacent thermal management components 300, so that each battery cell 100 has two sides in contact with two thermal management components 300 respectively. Multiple thermal management components 300 can be connected by connecting pipes to realize the connection between the various thermal management components 300 and the circulation of the heat exchange medium.

[0073] The thermal management component 300 has multiple channels 310, which can be arranged separately. The cross-section of the channel 310 can be a conventional shape such as a circle, rectangle, or ellipse, or other irregular shapes. The multiple channels 310 are arranged separately, that is, the channels 310 are not connected to each other. The multiple channels 310 can be arranged sequentially along the height direction of the battery device 10, or they can be arranged sequentially along other directions, which is not limited here.

[0074] Along the third direction Z, at least one of the two outermost channels 310 of the plurality of channels 310 is configured as a closed channel 311 without heat exchange medium, and at least one of the remaining channels is used to introduce heat exchange medium to regulate the temperature of the battery cell 100. The remaining channels refer to the channels 310 remaining after excluding the outermost closed channel 311.

[0075] Taking the height direction of the battery device 10 as an example, in the height direction of the battery device 10, among the multiple channels 310 of the thermal management component 300, the uppermost channel 310 and / or the lowermost channel 310 are closed channels 311 that do not allow heat exchange medium to flow through. At least one of the remaining channels 310, excluding the uppermost and / or lowermost closed channels 311, is used for the flow of heat exchange medium to regulate the temperature of the battery cell 100. The channel 310 through which heat exchange medium flows forms a flow channel 330, while the closed channel 311 without heat exchange medium flow forms a cavity 320. When the outermost cavity 320 of the thermal management component 300 ruptures due to external force, there is no leakage of heat exchange medium in the cavity 320, thus reducing the risk of heat exchange medium leakage in the thermal management component 300.

[0076] The method in which the channel 310 is configured as a closed channel 311 is not limited, for example but not limited to: by providing sealing members 303 at both ends of the channel 310, the sealing members 303 block the end openings of the channel 310 to form a closed channel 311; or, the channel 310 of the thermal management component 300 is integrally formed to form a closed channel 311.

[0077] The heat exchange medium can be a liquid such as water or ethylene glycol. The heat exchange medium is introduced into the channel 310 to regulate the temperature of the battery cell 100. When the temperature of the battery cell 100 is too high, the thermal management component 300 can cool down the battery cell 100; when the temperature of the battery cell 100 is too low, the thermal management component 300 can keep the battery cell 100 warm, thereby improving the service life of the battery device 10.

[0078] In the technical solution of this application embodiment, the thermal management component 300 has multiple channels 310, at least one channel 310 is used to introduce a heat exchange medium to regulate the temperature of the battery cell 100; along a third direction, at least one of the two outermost channels 310 among the multiple channels 310 is configured as a closed channel 311 without heat exchange medium. The specific direction of the third direction is not limited, for example, but not limited to the height direction of the battery device 10. In the height direction of the battery device 10, the uppermost channel 310 and / or the lowermost channel 310 in the thermal management component 300 are closed channels 311 without heat exchange medium. The closed channel 311 without heat exchange medium forms a cavity 320. That is, the outermost flow channel 330 of the thermal management component 300 is a cavity 320. When the outermost cavity 320 of the thermal management component 300 is broken due to external force, there is no leakage of heat exchange medium in the cavity 320, thus reducing the risk of heat exchange medium leakage in the thermal management component 300.

[0079] For example, when a battery cell 100 experiences thermal runaway, if the heat resistance of the thermal management component 300 is lower than the temperature of the ejected material from the battery cell 100, the ejected material may burn through the top of the thermal management component 300, causing leakage of the heat exchange medium in the uppermost channel 310. The technical solution of this application sets the uppermost channel 310 in the thermal management component 300 as a cavity 320, which can reduce the risk of leakage of the heat exchange medium.

[0080] When the bottom of the battery device 10 is impacted, if the bottom of the thermal management component 300 deforms and cracks, the heat exchange medium in the lowest channel 310 may leak. The technical solution of this application sets the lowest channel 310 in the thermal management component 300 as a cavity 320, thus reducing the risk of heat exchange medium leakage. Therefore, the technical solution of this application optimizes the structure of the battery device 10 and reduces the risk of heat exchange medium leakage in the thermal management component 300.

[0081] Please see Figures 8 to 11 According to some embodiments of this application, optionally, the closed channel 311 through which the heat exchange medium is not introduced forms a cavity 320, and the channel 310 through which the heat exchange medium is introduced forms a flow channel 330. The thermal management component 300 includes a plurality of cavities 320 and a plurality of flow channels 330. The plurality of cavities 320 and the plurality of flow channels 330 are arranged alternately in a third direction. And / or, the plurality of flow channels 330 are located between the two outermost cavities 320 in a third direction.

[0082] The enclosed channel 311 forms a cavity 320 because no heat exchange medium is introduced, and the cavity 320 has the functions of weight reduction and buffering. The channel 310 forms a flow channel 330 because it is used to introduce the heat exchange medium, and the heat exchange medium flowing through the flow channel 330 can regulate the temperature of the battery cell 100. The thermal management component 300 includes multiple cavities 320 and multiple flow channels 330. The arrangement of the multiple cavities 320 and multiple flow channels 330 is not limited. For example, the multiple cavities 320 and multiple flow channels 330 can be arranged along a third direction. Of course, the multiple flow channels 330 can be arranged adjacent to each other, or the multiple cavities 320 and multiple flow channels 330 can be arranged alternately along a third direction.

[0083] In this embodiment, the cavity 320 helps to reduce the weight of the thermal management component 300 and also serves as a buffer. When the thermal management component 300 is compressed and deformed, the cavity 320 can absorb the expansion force of the battery cell 100. The multiple cavities 320 also help to reduce the total weight of the heat exchange medium inside the thermal management component 300, achieving the effect of lightweighting. Furthermore, the multiple cavities 320 and multiple flow channels 330 are arranged alternately in sequence, which helps to improve the uniformity of the heat exchange medium distribution and improve the heat exchange performance.

[0084] In some embodiments of this application, multiple flow channels 330 are located between the two outermost cavities 320. The two outermost cavities 320 reduce the risk of heat exchange medium leakage caused by the flow channel 330 being broken by external force on the outside of the thermal management component 300, thereby improving the safety of the battery device 10.

[0085] According to some embodiments of this application, optionally, the third direction is the height direction of the battery device 10; the top of the thermal management component 300 is provided with a heat insulation layer; and / or, the bottom of the thermal management component 300 is provided with a reinforcing member.

[0086] The specific material of the thermal management component 300 is not limited, but may include, for example, but is not limited to, aluminum, non-metallic materials, etc. The insulation layer is used for heat insulation to delay heat diffusion, and the specific material of the insulation layer is not limited, but may include, for example, but is not limited to, inorganic silicate expanded coating, organic silicone non-expanded coating, epoxy resin expanded coating, alumina fiber layer, aluminum silicate fiber layer, etc.

[0087] Reinforcing components are used to improve structural strength and impact resistance. The specific materials of reinforcing components are not limited, such as but not limited to: rigid components (such as steel alloys), metal-plastic composites, foam, etc.

[0088] In this embodiment, the heat insulation layer can withstand high temperatures. The heat insulation layer ensures that the top of the thermal management component 300 will not be burned through by the high-temperature jets ejected when the battery cell 100 experiences thermal runaway, and prevents heat diffusion caused by leakage of the heat exchange medium inside the thermal management component 300.

[0089] In this embodiment, the reinforcing member increases the structural strength of the bottom of the thermal management component 300, ensuring that the bottom of the thermal management component 300 will not be broken by external impact, and reducing the risk of internal insulation failure of the housing 200 caused by leakage of heat exchange medium inside the thermal management component 300.

[0090] Please see Figures 10 to 15 According to some embodiments of this application, optionally, the channel 310 includes multiple deflection sub-channels 312, which are arranged sequentially along the second direction, and at least some of the deflection sub-channels 312 are inclined relative to the second direction in their extension direction.

[0091] In this embodiment, the second direction is the length direction X of the battery device 10, and the third direction is the height direction Z of the battery device 10. The deflection sub-channel 312 improves the heat exchange capacity by changing the flow direction of the heat exchange medium, extending the flow path, increasing turbulence, and thus avoiding local overheating or overcooling of the battery cell 100. Specifically, the deflection sub-channel 312 changes the flow direction of the heat exchange medium relative to the second direction, and at least a portion of the deflection sub-channel 312 is inclined relative to the second direction to form an angle. The specific angle of this angle is not limited and can be an acute angle, a right angle, or an obtuse angle, etc.

[0092] The arrangement of the multiple directional sub-channels 312 is not limited. For example, the multiple directional sub-channels 312 can be arranged sequentially at intervals along the second direction; or, the multiple directional sub-channels 312 can be connected sequentially along the second direction; or, a portion of the multiple directional sub-channels 312 can be arranged sequentially at intervals along the second direction, while another portion of the multiple directional sub-channels 312 can be connected sequentially along the second direction. The channel 310 includes multiple directional sub-channels 312, allowing the channel to be wavy, such as... Figure 10 and Figure 11 As shown; the channel can also be in the form of a broken line, such as... Figure 12 and Figure 13 As shown; the passage can also be stepped, such as Figure 14 and Figure 15 As shown; of course, the channel can also be other shapes, which are not limited here.

[0093] In this embodiment, at least a portion of the deflection sub-channels 312 extend obliquely along the second direction, increasing the flow path length of the heat exchange medium and extending the heat exchange time between the heat exchange medium and the battery cell 100, thereby improving the heat exchange capacity. Furthermore, the multiple deflection sub-channels 312 also facilitate the heat exchange medium to more uniformly regulate the temperature of the battery cell 100, preventing local overheating or undercooling of the battery cell 100 due to uneven flow distribution in the conventional parallel flow channel 330. The multiple channels 310 also facilitate the heat exchange medium to fully cover the battery cell 100 in the height direction, improving the uniformity of heat exchange between the heat exchange medium and the battery cell 100 in the thermal management component 300.

[0094] According to some embodiments of this application, optionally, the angle formed between the extension direction of at least a portion of the deflector channel 312 and the second direction is greater than or equal to 10° and less than or equal to 80°.

[0095] The angle formed between the extension direction of at least part of the deflection sub-channel 312 and the second direction can be 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°, or any value within the above range.

[0096] In this embodiment, the angle between the extension direction of the deflection sub-channel 312 and the second direction is appropriate, which is beneficial to enhancing the turbulence of the heat exchange medium within the deflection sub-channel 312, thereby improving the heat exchange efficiency. If the angle between the extension direction of the deflection sub-channel 312 and the second direction is too small, for example, less than 10°, the heat exchange medium will still flow almost parallel, and the turbulence effect will be weak; if the angle between the extension direction of the deflection sub-channel 312 and the second direction is too large, for example, greater than 80°, the resistance to the flow of the heat exchange medium will be large, resulting in an excessively high pressure drop and affecting the smoothness of the flow of the heat exchange medium.

[0097] According to some embodiments of this application, optionally, the deflection point of the deflection sub-channel 312 is arranged in a curved shape or a bent shape; and / or, multiple deflection sub-channels 312 are connected in sequence.

[0098] The reversal point of the reversing sub-channel 312 refers to the location where the flow direction of the heat exchange medium changes from one direction to another within the reversing sub-channel 312. The reversing sub-channel 312 can have one reversal point, or it can have multiple reversal points; the specific number is not limited here. For example... Figure 11 As shown, the reversing section of the reversing sub-channel 312 is arranged in a curved shape; as Figure 13 As shown, the reversing point of the reversing sub-channel 312 is arranged in a bent shape.

[0099] The direction-changing sub-channel 312 has a curved shape at the direction-changing point, that is, the direction-changing point of the direction-changing sub-channel 312 has a non-linear turning structure such as arc, U, or S shape; the direction-changing sub-channel 312 has a bent shape at the direction-changing point, that is, the direction-changing point of the direction-changing sub-channel 312 has a discontinuous, angular turning structure.

[0100] Please see Figure 11 In this embodiment, the reversing sub-channel 312 is curved at the reversing point to avoid abrupt changes in the flow direction of the heat exchange medium, reduce the flow resistance of the heat exchange medium, and improve the heat exchange efficiency.

[0101] Please see Figure 13 In this embodiment, the reversing point of the reversing sub-channel 312 is bent, which facilitates processing and manufacturing and helps to reduce the manufacturing cost of the thermal management component 300.

[0102] The multiple variable direction sub-channels 312 are connected in sequence, making the structure of channel 310 regular, which is convenient for processing and manufacturing and helps to reduce manufacturing costs.

[0103] Please see Figure 14 and Figure 15 According to some embodiments of this application, optionally, channel 310 further includes a buffer sub-channel 313, and along the second direction, two adjacent deflection sub-channels 312 are connected via the buffer sub-channel 313.

[0104] In this embodiment, the second direction is the length direction X of the battery device 10, and the third direction is the height direction Z of the battery device 10. The buffer sub-channel 313 can be used to adjust the flow rate of the heat exchange medium through the channel 310 to improve the heat exchange uniformity. The specific structure of the buffer sub-channel 313 is not limited, as long as it can buffer the flow rate of the heat exchange medium through two adjacent deflection sub-channels 312. For example, but not limited to: the buffer sub-channel 313 is arranged in a straight line, or the buffer sub-channel 313 is arranged in an arc; or, a part of the buffer sub-channel 313 is arranged in a straight line, and another part of the buffer sub-channel 313 is arranged in an arc.

[0105] In this embodiment, by connecting two adjacent deflection sub-channels 312 through the buffer sub-channel 313, the flow resistance of the heat exchange medium flowing through the connection point of the two adjacent deflection sub-channels 312 can be reduced, so that the heat exchange medium transitions smoothly and reduces kinetic energy loss.

[0106] In one embodiment, optionally, the angle formed between the extension direction of at least a portion of the buffer sub-channel 313 and the second direction is smaller than the angle formed between the extension direction of the deflection sub-channel 312 and the second direction. This arrangement can reduce the flow rate of the heat exchange medium through the two adjacent deflection sub-channels 312.

[0107] According to some embodiments of this application, optionally, at least a portion of the buffer sub-channel 313 extends along a second direction.

[0108] The buffer sub-channel 313 can be partially extended along the second direction; of course, the buffer sub-channel 313 can also be arranged in a straight line, that is, the heat exchange medium flows along the second direction without changing direction when it flows through the buffer sub-channel 313; of course, it is also possible that a part of the buffer sub-channel 313 is arranged in a straight line and extends along the second direction, while another part of the buffer sub-channel 313 is arranged in an arc shape.

[0109] In this embodiment, when the heat exchange medium flows through the buffer sub-channel 313, at least a portion of the heat exchange medium flows along the second direction, which is the extension direction of the channel 310, that is, at least a portion of the heat exchange medium flows in a parallel direction. This is beneficial to increase the flow velocity of the heat exchange medium through the buffer sub-channel 313, thereby improving the fluidity of the heat exchange medium flowing through the thermal management component 300.

[0110] According to some embodiments of this application, optionally, a closed channel 311 without heat exchange medium is formed into a cavity 320, and a channel 310 with heat exchange medium is formed into a flow channel 330. The thermal management component 300 includes a plurality of cavities 320 and a plurality of flow channels 330 arranged along a third direction. At least one cavity 320 is provided between two adjacent flow channels 330, and the projection portions of two adjacent flow channels 330 along a second direction overlap.

[0111] The enclosed channel 311 forms a cavity 320 because no heat exchange medium is introduced, and the cavity 320 has the functions of weight reduction and buffering. The channel 310 forms a flow channel 330 because it is used to introduce the heat exchange medium, and the heat exchange medium flowing through the flow channel 330 can regulate the temperature of the battery cell 100. The thermal management component 300 includes multiple cavities 320 and multiple flow channels 330. The arrangement of the multiple cavities 320 and multiple flow channels 330 is not limited. For example, the multiple flow channels 330 can be arranged adjacent to each other, or the multiple cavities 320 and multiple flow channels 330 can be arranged alternately along a third direction.

[0112] Channel 310 includes multiple deflection sub-channels 312. The channel 310 through which the heat exchange medium flows forms a flow channel 330, which in turn includes multiple deflection sub-channels 312. The deflection sub-channels 312 improve the heat exchange capacity by changing the flow direction of the heat exchange medium, extending the flow path, and increasing turbulence, thereby avoiding local overheating or overcooling of the battery cell 100. The deflection sub-channels 312 change the flow direction of the heat exchange medium relative to the second direction. At least some of the deflection sub-channels 312 are inclined relative to the second direction to form an angle. The specific angle of this angle is not limited and can be an acute angle, a right angle, or an obtuse angle, etc. At least one cavity 320 is provided between two adjacent flow channels 330. The projection portions of the two adjacent flow channels 330 along the second direction overlap, and the flow channel 330 includes multiple deflection sub-channels 312, so that the projection of the two adjacent flow channels 330 can cover the projection of the cavity 320 located between them due to the multiple deflection sub-channels 312. With this arrangement, in the height direction of the battery cell 100, multiple flow channels 330 cover part of the cavity 320, that is, the heat exchange medium in the multiple flow channels 330 fully covers the battery cell 100 in the height direction, thereby improving the uniformity of heat exchange on the battery cell 100.

[0113] In this embodiment, the cavity 320 helps to reduce the weight of the thermal management component 300 and also serves as a buffer. When the thermal management component 300 is compressed and deformed, the cavity 320 can absorb the expansion force of the battery cell 100. Multiple cavities 320 also help to reduce the total weight of the heat exchange medium in the thermal management component 300, achieving the effect of lightweighting. Furthermore, a cavity 320 is provided between two adjacent flow channels 330, and the projections of the two adjacent flow channels 330 overlap, that is, the projections of the two adjacent flow channels 330 cover the projection of the cavity 320 located between them. This helps the heat exchange medium in the multiple flow channels 330 to fully cover the battery cell 100 in the height direction, thereby improving the uniformity of heat exchange between the heat exchange medium in the thermal management component 300 and the battery cell 100.

[0114] Please see Figures 6 to 9 According to some embodiments of this application, optionally, the thermal management component 300 includes a heat exchanger 301, a collector 302, and a sealing component 303. The heat exchanger 301 has a plurality of channels 310. The collector 302 is disposed at both ends of the heat exchanger 301. The collector 302 has a cavity and a through hole. The through hole connects the cavity and a channel 310 to form a flow channel 330 for introducing heat exchange medium. The sealing component 303 is disposed at both ends of a channel 310 and seals the end opening of the channel 310 to form a closed channel 311 that does not introduce heat exchange medium.

[0115] The heat exchanger 301 has multiple channels 310. The heat exchanger 301 can be plate-shaped, or it can be other shapes; no specific limitation is made here. The cross-section of the channels 310 can be a conventional shape such as a circle, rectangle, or ellipse, or other irregular shapes. The collectors 302 are located at both ends of the heat exchanger 301. The heat exchange medium can circulate unidirectionally within the heat exchanger 301; that is, the heat exchange medium can enter from the collector 302 at one end of the heat exchanger 301 and then exit directly from the collector 302 at the other end. Alternatively, the heat exchange medium can circulate repeatedly within the heat exchanger 301 before exiting through the collector 302.

[0116] The sealing element 303 is provided at the end openings at both ends of the channel 310 that needs to be sealed, so as to form a closed channel 311. The sealing element 303 can be sealed by welding. Of course, it can also be sealed by adhesive sealing, sintering sealing, sealing ring sealing or thread sealing, etc., which are not limited here.

[0117] In this embodiment, channel 310 communicates with the cavity through a through hole to form flow channel 330; the end openings at both ends of channel 310 are sealed by sealing member 303 to form closed channel 311. The sealing by sealing member 303 achieves a stable sealing effect. Closed channel 311 is cavity 320. Cavity 320 helps reduce the weight of thermal management component 300 and also acts as a buffer. When thermal management component 300 deforms under pressure, cavity 320 can absorb the expansion force of battery cell 100. Multiple cavities 320 also help reduce the total weight of heat exchange medium within thermal management component 300, achieving a lightweight effect. In this embodiment, thermal management component 300 can reduce the heat exchange medium capacity within thermal management component 300 without changing the contact area with battery cell 100, allowing heat exchange component 301 to provide stable support, constraint, and anti-deformation effect for battery cell 100.

[0118] Please see Figures 8 to 15 According to some embodiments of this application, optionally, the heat exchanger 301 has an inner cavity and a plurality of partitions 340 disposed in the inner cavity, the plurality of partitions 340 dividing the inner cavity into a plurality of channels 310; the partitions 340 include a plurality of reversing partitions 341, the plurality of reversing partitions 341 are arranged sequentially along a second direction, at least some of the reversing partitions 341 are inclined relative to the second direction, and two adjacent reversing partitions 341 along a third direction are spaced apart to form a reversing sub-channel 312, the channel 310 having a plurality of reversing sub-channels 312.

[0119] The manufacturing process of the heat exchanger 301 is not limited, for example, but not limited to extrusion molding or welding. When the heat exchanger 301 is manufactured by extrusion molding and the channel 310 includes multiple deflecting sub-channels 312, that is, when the partition 340 includes multiple deflecting partition sections 341, this is achieved by adjusting the relative position of the extrusion die and the extrusion traction belt. The initially manufactured heat exchanger 301 has an irregular structure and needs to be cut into a regular structure for easy use. For example, the heat exchanger 301 can be cut into a regular rectangular structure. During the cutting process, it is necessary to avoid cutting into the channel 310 through which the heat exchange medium enters, that is, to avoid cutting into the flow channel 330, so as to avoid the problem of heat exchange medium leakage.

[0120] The separator 340 includes multiple deflection separator segments 341. At least some of the deflection separator segments 341 are inclined relative to the second direction. The angle of inclination is not limited. For example, the angle formed between the extension direction of at least some of the deflection separator segments 341 and the second direction is greater than or equal to 10° and less than or equal to 80°. The angle can be 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°, or any value within the above range.

[0121] In this embodiment, the separator 340 includes multiple deflection separator sections 341. A deflection sub-channel 312 is formed by the interval between two adjacent deflection separator sections 341, which simplifies the formation of the deflection sub-channel 312 and facilitates its manufacturing. The deflection sub-channel 312 increases the flow path length of the heat exchange medium, resulting in a longer heat exchange time between the heat exchange medium and the battery cell 100, thus improving the heat exchange capacity. Furthermore, the multiple deflection sub-channels 312 also facilitate the more uniform adjustment of the temperature of the battery cell 100 by the heat exchange medium, preventing local overheating or undercooling of the battery cell 100 due to uneven flow distribution in the traditional parallel flow channel 330.

[0122] According to some embodiments of this application, optionally, the separator 340 further includes a buffer separator 342; along the second direction, two adjacent deflection separators 341 are connected via the buffer separator 342.

[0123] The specific structure of the buffer partition 342 is not limited, as long as it can buffer the flow velocity of the heat exchange medium flowing through the deflection sub-channel 312 formed by two adjacent deflection partitions 341. For example, but not limited to: the buffer partition 342 is arranged in a straight line, or the buffer partition 342 is arranged in an arc; or, a part of the buffer partition 342 is arranged in a straight line and another part of the buffer partition 342 is arranged in an arc.

[0124] In this embodiment, two adjacent buffer separation sections 342 are spaced apart along the third direction to form a buffer sub-channel 313. Along the second direction, two adjacent deflection sub-channels 312 are connected via the buffer sub-channel 313. By connecting two adjacent deflection sub-channels 312 through the buffer sub-channel 313, the flow resistance of the heat exchange medium at the connection point of the two adjacent deflection sub-channels 312 can be reduced, allowing the heat exchange medium to transition smoothly and reducing kinetic energy loss.

[0125] In one embodiment, optionally, the angle formed by the extension direction of at least a portion of the buffer partition 342 and the second direction is smaller than the angle formed by the extension direction of the deflection partition 341 and the second direction. This arrangement can reduce the flow rate of the heat exchange medium through the two adjacent deflection sub-channels 312.

[0126] In one embodiment, optionally, at least a portion of the buffer partition 342 extends along a second direction. Thus, at least a portion of the buffer sub-channel 313 formed by two adjacent buffer partitions 342 extending along a third direction extends along the second direction, which is the extension direction of the channel 310. In other words, at least a portion of the heat exchange medium flows in a parallel direction, which helps to increase the flow velocity of the heat exchange medium through the buffer sub-channel 313, thereby improving the flowability of the heat exchange medium through the thermal management component 300.

[0127] According to some embodiments of this application, a battery device 10 is provided. The battery device 10 includes at least one battery cell 100, a housing 200, and a thermal management component 300. The battery cell 100 is disposed within the housing 200. The thermal management component 300 is disposed within the housing 200, and the thermal management component 300 and the battery cell 100 are arranged along a first direction. The thermal management component 300 has a plurality of channels 310 extending along a second direction. Along a third direction, at least one of the two outermost channels 310 is configured as a closed channel 311 through which no heat exchange medium is introduced, and at least one of the remaining channels 310 is used to introduce a heat exchange medium to regulate the temperature of the battery cell 100. The first direction, the second direction, and the third direction intersect each other. A closed channel 311 without heat exchange medium forms a cavity 320, and a channel 310 with heat exchange medium forms a flow channel 330. The thermal management component 300 includes multiple cavities 320 and multiple flow channels 330; the multiple cavities 320 and multiple flow channels 330 are arranged alternately in sequence along a third direction. The channel 310 includes multiple deflection sub-channels 312, which are arranged sequentially along a second direction, and at least some of the deflection sub-channels 312 are inclined relative to the second direction. The deflection points of the deflection sub-channels 312 are curved or bent; and / or, the channel 310 also includes a buffer sub-channel 313, through which adjacent deflection sub-channels 312 are connected along the second direction. A closed channel 311 through which no heat exchange medium is introduced forms a cavity 320, and a channel 310 through which the heat exchange medium is introduced forms a flow channel 330. The thermal management component 300 includes multiple cavities 320 and multiple flow channels 330 arranged along a third direction. At least one cavity 320 is provided between two adjacent flow channels 330, and the projection portions of two adjacent flow channels 330 along a second direction overlap. The thermal management component 300 includes a heat exchange element 301, a flow collector 302, and a sealing element 303. The heat exchange element 301 has multiple channels 310. The flow collector 302 is located at both ends of the heat exchange element 301 and has a cavity and a through hole. The through hole connects the cavity and a channel 310 to form a flow channel 330 for introducing the heat exchange medium. The sealing element 303 is located at both ends of a channel 310 and seals the end openings of the channel 310 to form a closed channel 311 through which no heat exchange medium is introduced. The heat exchanger 301 has an inner cavity and a plurality of partitions 340 disposed in the inner cavity. The plurality of partitions 340 divide the inner cavity into a plurality of channels 310. The partitions 340 include a plurality of reversing partitions 341, which are arranged sequentially along a second direction. At least some of the reversing partitions 341 are inclined relative to the second direction. Two adjacent reversing partitions 341 are spaced apart along a third direction to form a reversing sub-channel 312. The channel 310 has a plurality of reversing sub-channels 312.

[0128] This application also proposes an electrical device including a battery device 10. The specific structure of the battery device 10 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here. The battery device 10 is used to store or provide electrical energy. The battery device 10 optimizes the structure of the thermal management component 300, reducing the risk of heat exchange medium leakage in the thermal management component 300. The electrical device can be an electric vehicle, electric motorcycle, electric bicycle, mobile phone, portable device, laptop computer, ship, spacecraft, electric toy, and power tool, etc.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: At least one battery cell; The housing contains the individual battery cells. A thermal management component is disposed within the housing, and the thermal management component and the battery cell are arranged along a first direction; the thermal management component has multiple channels, which extend along a second direction; along a third direction, at least one of the two outermost channels is configured as a closed channel without heat exchange medium, and at least one of the remaining channels is used to introduce heat exchange medium to regulate the temperature of the battery cell, wherein the first direction, the second direction, and the third direction intersect each other.

2. The battery device as claimed in claim 1, characterized in that, The closed channel without heat exchange medium forms a cavity, and the channel with heat exchange medium forms a flow channel. The thermal management component includes multiple cavities and multiple flow channels. The multiple cavities and multiple flow channels are arranged alternately in sequence along the third direction. And / or, the plurality of said flow channels are located between the two outermost cavities along the third direction.

3. The battery device as claimed in claim 1, characterized in that, The third direction is the height direction of the battery device; the top of the thermal management component is provided with a heat insulation layer; And / or, the bottom of the thermal management component is provided with a reinforcing member.

4. The battery device as claimed in claim 1, characterized in that, The channel includes multiple deflection sub-channels, which are arranged sequentially along the second direction, and at least some of the deflection sub-channels are inclined relative to the second direction in their extension direction.

5. The battery device as claimed in claim 4, characterized in that, The angle formed between the extension direction of at least a portion of the deflection sub-channel and the second direction is greater than or equal to 10° and less than or equal to 80°.

6. The battery device as claimed in claim 4, characterized in that, The deflection point of the deflection sub-channel is arranged in a curved or bent shape; And / or, the multiple sections of the direction-changing sub-channels are connected sequentially.

7. The battery device as claimed in claim 4, characterized in that, The channel also includes a buffer sub-channel, and along the second direction, two adjacent segments of the deflection sub-channel are connected via the buffer sub-channel.

8. The battery device as claimed in claim 7, characterized in that, At least a portion of the buffer sub-channels are provided to extend along the second direction.

9. The battery device as claimed in claim 4, characterized in that, The closed channel without heat exchange medium forms a cavity, and the channel with heat exchange medium forms a flow channel. The thermal management component includes a plurality of cavities and a plurality of flow channels arranged along the third direction. At least one cavity is provided between two adjacent flow channels, and the projection portions of two adjacent flow channels along the second direction overlap.

10. The battery device according to any one of claims 1 to 9, characterized in that, The thermal management component includes a heat exchanger, a manifold, and a sealing element. The heat exchanger has multiple channels. The manifold is located at both ends of the heat exchanger and has a cavity and a through hole. The through hole connects the cavity and one of the channels to form a flow channel for the introduction of heat exchange medium. The sealing element is located at both ends of one of the channels and seals the end openings of the channels to form a closed channel that does not allow the introduction of heat exchange medium.

11. The battery device as claimed in claim 10, characterized in that, The heat exchanger has an inner cavity and a plurality of partitions disposed in the inner cavity, the plurality of partitions dividing the inner cavity into a plurality of channels; the partitions include a plurality of directional partition segments, the plurality of directional partition segments are arranged sequentially along the second direction, at least a portion of the directional partition segments are inclined relative to the second direction, and two adjacent directional partition segments along the third direction are spaced apart to form a directional sub-channel, the channel having a plurality of directional sub-channels.

12. The battery device as claimed in claim 11, characterized in that, The separator further includes a buffer separator section; along the second direction, two adjacent deflection separator sections are connected via the buffer separator section.

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

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