Battery device and power utilization device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device provided by the utility model comprises a battery monomer and a heat management component, the heat management component is in direct contact with the battery monomers, the heat management component is provided with a heat exchange flow channel, the heat exchange flow channel contains a non-Newtonian fluid, the non-Newtonian fluid can be converted from a first state to a second state under the action of external force, and the fluidity of the non-Newtonian fluid in the first state is greater than that of the non-Newtonian fluid in the second state; the non-Newtonian fluid in the first state is used for flowing in the heat exchange runner; a plurality of ribs are arranged in the heat exchange flow channel at intervals and divide the heat exchange flow channel into a plurality of flow guide grooves. Therefore, the non-Newtonian fluid in the first state exchanges heat with the battery monomers, and the non-Newtonian fluid in the second state absorbs and disperses external force impact, so that the risk of structural failure of the battery device caused by the external force impact is improved; the heat exchange efficiency of the non-Newtonian fluid is improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle life, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] However, battery devices are at a high risk of structural failure when subjected to collisions, which in turn makes the battery devices susceptible to fire and combustion when subjected to external impacts. Utility Model Content

[0004] The main purpose of this application is to provide a battery device and an electrical device, aiming to solve the technical problem in the prior art that battery devices are prone to structural failure when subjected to external force impact.

[0005] To solve the above problems, the present application provides a battery device, which includes a battery cell and a thermal management component; the thermal management component is in direct contact with the battery cell, and the thermal management component is provided with a heat exchange channel, which contains a non-Newtonian fluid. The non-Newtonian fluid can be converted from a first state to a second state under the action of an external force, and the fluidity of the non-Newtonian fluid in the first state is greater than the fluidity in the second state. The non-Newtonian fluid in the first state is used to flow in the heat exchange channel; a plurality of ribs are provided at intervals in the heat exchange channel, and the plurality of ribs divide the heat exchange channel into a plurality of guide grooves. Therefore, the non-Newtonian fluid in the first state can flow in the heat exchange channel, and can exchange heat with the battery cell through the non-Newtonian fluid in the first state, and the non-Newtonian fluid can be converted to the second state when subjected to external force impact. The fluidity of the non-Newtonian fluid in the second state is less than the fluidity of the non-Newtonian fluid in the first state. The non-Newtonian fluid in the second state can absorb and disperse external force impact to protect the battery cell, strengthen the overall structural strength of the battery device, improve the risk of structural failure of the battery device caused by external force impact, and improve the reliability of the battery device. At the same time, the heat exchange channel is divided into multiple guide grooves by multiple ribs, which facilitates the independent flow of non-Newtonian fluids in different guide grooves, improves the fluidity of the non-Newtonian fluid in the heat exchange channel, and thus improves the heat exchange efficiency between the non-Newtonian fluid and the battery cell.

[0006] In some embodiments, a battery cell includes a terminal, an end face, and an outer wall. The outer wall is connected to the end face, the terminal is disposed on the end face, and the thermal management component directly contacts the outer wall. Thus, by having the thermal management component directly contact the outer wall of the battery cell, the heat exchange efficiency between the thermal management component and the battery cell is improved, thereby improving the reliability of the battery device.

[0007] In some embodiments, the outer wall includes two first side surfaces connected to the end surface and two second side surfaces connected to the end surface, the two first side surfaces are disposed opposite to each other, the two second side surfaces are disposed opposite to each other, the area of ​​the first side surfaces is greater than the area of ​​the second side surfaces, and the thermal management component directly contacts the first side surfaces and / or the second side surfaces. Thus, by having the thermal management component directly contact the first side surfaces and / or the second side surfaces, the thermal management component can be in full contact with the battery cell, improving the heat exchange efficiency between the thermal management component and the battery cell, while also reducing the risk of structural failure of the first and second side surfaces of the battery cell due to external impact, thereby improving the reliability of the battery device.

[0008] In some embodiments, the outer wall includes a bottom surface opposite the end surface, and the thermal management component directly contacts the bottom surface. Thus, direct contact between the thermal management component and the battery cell facilitates full contact between the thermal management component and the battery cell, improves the heat exchange efficiency between the thermal management component and the battery cell, mitigates the risk of structural failure of the battery cell bottom surface due to external impact, and improves the reliability of the battery device.

[0009] In some embodiments, there are multiple battery cells, and the thermal management component simultaneously contacts the outer walls of multiple battery cells. Thus, by making the thermal management component simultaneously contact the outer walls of multiple battery cells, the thermal management component is in full contact with multiple battery cells, improving the efficiency of heat exchange between the thermal management component and multiple battery cells, and further improving the reliability of the battery device.

[0010] In some embodiments, multiple battery cells are divided into at least one battery group, with the multiple battery cells in the same battery group arranged sequentially. The thermal management component includes a side plate, which simultaneously contacts the outer wall surfaces of the multiple battery cells in the same battery group. This allows the side plate of the thermal management component to fully contact the multiple battery cells in the same battery group simultaneously, facilitating simultaneous heat exchange between the thermal management component and the battery cells in the same battery group. The side plate also mitigates the risk of structural failure of the multiple battery cells in the same battery group due to external impact, thereby improving the reliability of the battery device.

[0011] In some embodiments, there are multiple side panels, each of which is spaced apart, with at least one battery cell group sandwiched between each pair of side panels. Thus, by sandwiching at least one battery cell group between two spaced-apart side panels, the two spaced-apart side panels can fully contact the battery cell group from both sides, providing support and protection for the battery cell group from both sides. This improves the heat exchange efficiency between the thermal management component and the battery cell group, further mitigating the risk of structural failure of the battery cell group due to external force impacts on both sides.

[0012] In some embodiments, the thermal management component includes a manifold that connects the multiple side plates. Thus, the non-Newtonian fluid can flow between the multiple side plates through the manifold, improving the fluidity of the non-Newtonian fluid in the thermal management component, facilitating better heat exchange between the thermal management component and the battery cells, and improving the heat exchange efficiency between the thermal management component and the battery cells.

[0013] In some embodiments, the outer wall includes two first side surfaces connected to the end surfaces and a second side surface connected to the two end surfaces. The two first side surfaces are disposed opposite each other, and the two second side surfaces are disposed opposite each other. The area of ​​the first side surfaces is greater than the area of ​​the second side surfaces. Multiple battery cells in the same battery group are arranged in sequence in a direction perpendicular to the first side surfaces, and the side plate simultaneously contacts the second side surfaces of the multiple battery cells in the same battery group. Thus, by the side plate simultaneously contacting the second side surfaces of the multiple battery cells in the same battery group, the side plate is in full contact with the smaller second side surfaces of the battery cells, thereby improving the heat exchange efficiency between the thermal management component and the multiple battery cells simultaneously, reducing the risk of structural failure of the second side surfaces of the battery cells due to external impact, and improving the reliability of the battery device.

[0014] In some embodiments, the outer wall includes two first side surfaces connected to the end surfaces and a second side surface connected to the two end surfaces. The two first side surfaces are disposed opposite each other, and the two second side surfaces are disposed opposite each other. The area of ​​the first side surfaces is greater than the area of ​​the second side surfaces. Multiple battery cells in the same battery group are arranged in sequence in a direction perpendicular to the second side surfaces, and the side plate simultaneously contacts the first side surfaces of multiple battery cells in the same battery group. Thus, by the side plate simultaneously contacting the larger first side surfaces of multiple battery cells in the same battery group, the contact area between the side plate and the multiple battery cells in the same battery group is increased, improving the heat exchange efficiency between the thermal management component and the multiple battery cells simultaneously, and mitigating the risk of structural failure of the first side surfaces of the battery cells due to external force impact, thereby improving the reliability of the battery device.

[0015] In some embodiments, the outer wall surface includes a bottom surface disposed opposite the end surface, and the thermal management component includes a bottom plate, with the bottom surfaces of the multiple battery cells simultaneously contacting the bottom plate. This allows the bottom plate of the thermal management component to fully contact the bottom surfaces of the multiple battery cells simultaneously, improving the efficiency of heat exchange between the thermal management component and the multiple battery cells, further mitigating the risk of structural failure of the bottom surfaces of the multiple battery cells due to external impact, and improving the reliability of the battery device.

[0016] In some embodiments, the non-Newtonian fluid is filled with a thermally conductive filler. Thus, by filling the non-Newtonian fluid with the thermally conductive filler, the thermal conductivity of the non-Newtonian fluid is increased, thereby improving the heat exchange efficiency between the non-Newtonian fluid and the battery cells.

[0017] In order to solve the above problems, the present application also provides an electrical device, which includes the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application;

[0020] Figure 2 is an exploded schematic diagram of a battery device according to one or more embodiments of the present application;

[0021] Figure 3 is a first structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0022] Figure 4 is a second structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0023] Figure 5 is a third structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0024] Figure 6 is a fourth structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0025] Figure 7 is a schematic cross-sectional view of a heat exchange channel of a battery device according to one or more embodiments of the present application;

[0026] Figure 8is a fifth structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0027] Figure 9 is a sixth structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0028] Figure 10 is a seventh structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0029] Figure 1: Vehicle 1; battery device 2; controller 3; motor 4; housing 200; first portion 210; second portion 220; battery cell 10; battery group 100; pole 11; end face 12; outer wall 13; first side face 131; second side face 132; bottom face 133; thermal management component 20; heat exchange channel 21; rib 211; guide groove 212; non-Newtonian fluid 22; side plate 23; bottom plate 24; manifold 25. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0032] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0033] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0034] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0035] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0036] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0037] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0038] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As battery applications continue to expand, market demand is also growing.

[0039] The battery device may be subjected to external force impact during use. Under external force impact, the battery device is prone to structural damage or failure, and may even cause the risk of fire and combustion of the battery device.

[0040] To address the technical problems existing in the related art, a battery device and an electrical device are provided. The battery device exchanges heat with the battery cells via a thermal management component. The thermal management component is in direct contact with the battery cells and contains a non-Newtonian fluid. The non-Newtonian fluid can flow within the thermal management component in a first state, exchanging heat with the battery cells. When subjected to external force, the non-Newtonian fluid can transition to a second state. The fluidity of the non-Newtonian fluid in the second state is less than that in the first state, thereby absorbing and dispersing external force shocks, protecting the battery cells, and mitigating the risk of structural failure of the battery device due to external force shocks.

[0041] Batteries mentioned in this field can be categorized as either primary batteries or rechargeable batteries, depending on whether they are rechargeable. Primary batteries are also called "disposable" batteries or primary batteries because once they are depleted, they cannot be recharged and must be discarded. Rechargeable batteries are also called secondary batteries, secondary batteries, or storage batteries. Rechargeable batteries are manufactured using different materials and processes than primary batteries. Their advantage is that they can be reused multiple times after charging, and their output current capacity is higher than that of most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries offer advantages such as light weight, high capacity (1.5 to 2 times that of nickel-metal hydride batteries of the same weight), no memory effect, and a very low self-discharge rate. Consequently, despite their relatively high price, they are widely used. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used for these applications is relatively low, they offer high output, high charging current, and a long service life, albeit at a higher cost.

[0042] The batteries described in the embodiments of this application are either rechargeable batteries or disposable batteries. The embodiments disclosed herein will be described primarily using lithium-ion batteries as an example. It should be understood that the embodiments disclosed herein are applicable to any other suitable type of rechargeable battery. The batteries described in the embodiments disclosed herein can be directly or indirectly used in appropriate devices to power such devices.

[0043] The present application provides an electrical device, which may include but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery-powered vehicles, electric cars, ships, spacecraft, and the like. The electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, space shuttles, and spacecraft. The electrical device may include a battery device, which may provide electrical energy to the device to achieve corresponding functions.

[0044] Taking the electrical device as an electric vehicle as an example, the electric vehicle may include a battery device.

[0045] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of a vehicle according to one or more embodiments of the present application.

[0046] Vehicle 1 can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Vehicle 1 is internally provided with a battery assembly 2, which can be located at the bottom, front, or rear of vehicle 1. Battery assembly 2 can be used to power vehicle 1, for example, as an operating power source for vehicle 1. Vehicle 1 also includes a controller 3 and a motor 4. Controller 3 controls battery assembly 2 to power motor 4, for example, to meet the power requirements of vehicle 1 for starting, navigation, and driving.

[0047] In some embodiments of the present application, the battery device 2 can serve not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0048] In order to improve the performance of the electrical device, this application provides a battery device, please refer to Figure 2 and Figure 3 , Figure 2 is an exploded schematic diagram of a battery device according to one or more embodiments of the present application; Figure 3 1 is a first structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0049] The battery device 2 includes a battery cell 10 and a thermal management component 20; the thermal management component 20 is in direct contact with the battery cell 10, and the thermal management component 20 is provided with a heat exchange channel 21, which contains a non-Newtonian fluid 22. The non-Newtonian fluid 22 can be converted from a first state to a second state under the action of an external force. The fluidity of the non-Newtonian fluid 22 in the first state is greater than the fluidity in the second state. The non-Newtonian fluid 22 in the first state is used to flow in the heat exchange channel 21.

[0050] The shape of the battery device 2 may include but is not limited to a square, cylindrical, or other arbitrary shapes.

[0051] In the battery device 2, there may be one or more battery cells 10. Multiple battery cells 10 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 10. Multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 10 is housed within the housing 200. Alternatively, the battery device 2 may comprise multiple battery cells 10 first connected in series, in parallel, or in a hybrid connection to form a battery module, which is then further connected in series, in parallel, or in a hybrid connection to form a single unit and housed within the housing 200. The battery device 2 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 10.

[0052] The battery cell 10 can be manufactured in two ways: laminated and wound. Laminated batteries have a uniform current collection effect, low internal resistance, and high specific power. However, in order to improve precision, they require extremely high mold precision, high equipment investment, and a relatively complex process, resulting in low production efficiency. Wound batteries are simple to manufacture, with average equipment precision requirements for the production and assembly processes, high production efficiency, and low cost. In terms of performance, wound batteries have excellent high and low temperature performance, charge very quickly, have an ultra-long life, stable high output voltage, a sturdy structure, and strong shock resistance.

[0053] The battery cell 10 refers to the smallest unit that makes up the battery device 2. The battery cell may include but is not limited to cylindrical batteries, square shell batteries, blade batteries and soft pack batteries, etc. The battery cell 10 may include a casing, an electrode assembly and other functional components. The casing can form the internal environment of the battery cell 10 and isolate the internal environment of the battery cell 10 from the external environment. It can be understood that the casing can provide support and protection for the components in the internal environment of the battery cell 10. The electrode assembly is the component in the battery cell 10 where the electrochemical reaction occurs. One or more electrode assemblies may be contained in the casing. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and an isolating member is usually provided between the positive electrode sheet and the negative electrode sheet.

[0054] The thermal management component 20 can be used to exchange heat with the battery cells 10. The thermal management component 20 may include, but is not limited to, a heat exchange plate. The thermal management component 20 may be made of, but is not limited to, copper, aluminum, aluminum-brazed composite materials, or any other material with good thermal conductivity. It is understood that the thermal management component 20 can absorb heat from the battery cells 10 or provide heat to the battery cells 10. The thermal management component 20 may directly contact the outer surface of the battery cells 10. The thermal management component 20 is provided with a heat exchange channel 21 containing a non-Newtonian fluid 22. A non-Newtonian fluid 22 exhibits a nonlinear relationship between shear stress and shear strain rate, and its viscosity varies with stress or shear rate. The non-Newtonian fluid 22 may be a shear-thickening fluid. The non-Newtonian fluid 22 can transition between a first state and a second state under the action of an external force. It should be noted that the viscosity of the non-Newtonian fluid 22 increases with increasing shear rate. The non-Newtonian fluid 22 can be in the first state when unaffected by an external force and in the second state when subjected to an external force, i.e., a higher shear rate. The fluidity of the non-Newtonian fluid 22 in the first state is better than that in the second state. The non-Newtonian fluid 22 in the first state is used to flow within the heat exchange channel 21. It is understood that the non-Newtonian fluid 22 in the first state can serve as a heat exchange medium to exchange heat with the battery cell 10, which helps the battery cell 10 dissipate heat. The heat exchange channel 21 can be used to guide the flow of the non-Newtonian fluid 22 in the first state, thereby improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10. The viscosity of the non-Newtonian fluid 22 increases sharply with increasing shear rate, allowing the non-Newtonian fluid 22 to quickly harden when subjected to a rapid external force, thereby absorbing and dissipating the energy of the impact. In some application scenarios, when the battery device 2 is subjected to external force impact, for example, when the battery device 2 is subjected to a high-speed collision, the non-Newtonian fluid 22 in the heat exchange channel 21 is subjected to external force and the shear rate is large. The viscosity of the non-Newtonian fluid 22 increases rapidly, thereby hardening and exhibiting solid-like mechanical characteristics, thereby effectively absorbing and dispersing the impact energy, providing protection for the battery cell 10, improving the structural strength of the battery device 2, and alleviating the risk of damage to the battery cell 10 under external force impact.

[0055] Through the above-mentioned embodiment, the non-Newtonian fluid 22 in the first state can flow in the heat exchange channel 21, and can exchange heat with the battery cell 10 through the non-Newtonian fluid 22 in the first state, and the non-Newtonian fluid 22 can be converted to the second state when subjected to external force impact. The fluidity of the non-Newtonian fluid 22 in the second state is less than the fluidity of the non-Newtonian fluid 22 in the first state. The non-Newtonian fluid in the second state can absorb and disperse the external force impact to protect the battery cell 10, strengthen the overall structural strength of the battery device 2, improve the risk of structural failure of the battery device 2 caused by external force impact, and improve the reliability of the battery device 2.

[0056] In some embodiments, the battery device 2 includes a housing 200 and a battery cell 10, with the battery cell 10 disposed within the housing 200. The housing 200 is used to provide a storage space for the battery cell 10, and the housing 200 can adopt a variety of structures. In some embodiments, the housing 200 can include a first portion 210 and a second portion 220, which overlap each other and together define a storage space 130 for accommodating the battery cell. The second portion 220 can be a hollow structure with one end open, and the first portion 210 can be a plate-like structure, with the first portion 210 overlapping the open side of the second portion 220, so that the first portion 210 and the second portion 220 jointly define a storage space. The first portion 210 and the second portion 220 can also be hollow structures with one end open, with the open side of the first portion 210 overlapping the open side of the second portion 220.

[0057] In some embodiments, a battery cell 10 includes a terminal 11, an end face 12, and an outer wall 13. The outer wall 13 is connected to the end face 12. The terminal 11 is disposed on the end face 12, and the thermal management component 20 directly contacts the outer wall 13. The terminal 11 may include a positive terminal and a negative terminal, and is used for outputting current and connecting to an external circuit. The end face 12 and the outer wall 13 can be different parts of the outer surface of the battery cell 10. For example, taking a square battery cell 10 as an example, the square battery cell 10 has six side walls, at least one of which is an end face 12, and the other side walls are outer walls 13. Specifically, one side wall is an end face 12, and five side walls are outer walls 13. The terminal 11 is disposed on the end face 12. In some application scenarios, the battery cell 10 has a housing, which includes an end cap and a shell. The end cap is a component that covers the opening of the shell to isolate the internal environment of the battery cell 10 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). This makes the end cap less likely to deform when subjected to compression or collision, giving the battery cell 10 greater structural strength and improved safety. The housing is a component that cooperates with the end cap to form an internal environment for the battery cell 10, where this internal environment can be used to accommodate the electrode assembly, electrolyte, and other components. The housing and end cap can be separate components. An opening can be provided in the housing, and the end cap can be closed over the opening to form the internal environment of the battery cell 10. Alternatively, the end cap and housing can be integrated. Specifically, the end cap and housing can form a common connection surface before other components are inserted into the housing. When the interior of the housing needs to be enclosed, the end cap can be closed over the housing. The housing can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the housing can be determined based on the specific shape and size of the electrode assembly. Specifically, the end surface 12 may be the side of the end cap that is away from the internal environment of the battery cell 10, and the outer wall surface 13 may be the side of the housing that is away from the internal environment of the battery cell 10. The thermal management component 20 is in direct contact with the outer wall surface 13. Thus, by having the thermal management component 20 directly contact the outer wall surface 13 of the battery cell 10, the heat exchange efficiency between the thermal management component 20 and the battery cell 10 is improved, thereby improving the reliability of the battery device 2.

[0058] In some embodiments, the outer wall surface 13 includes two first side surfaces 131 connected to the end surface 12 and two second side surfaces 132 connected to the end surface 12. The two first side surfaces 131 are arranged back to back, and the two second side surfaces 132 are arranged back to back. The area of ​​the first side surface 131 is larger than the area of ​​the second side surface 132, and the thermal management component 20 directly contacts the first side surface 131. Exemplarily, the thermal management component 20 can directly contact the first side surface 131 but not the second side surface 132. It should be noted that the thermal management component 20 can directly contact part of the first side surface 131 or completely cover the first side surface 131. It is understandable that the thermal management component 20 can better exchange heat with the battery cell 10 from the first side surface 131 in direct contact with it. At the same time, when the first side surface 131 is impacted by external force, it is convenient for the thermal management component 20 to better absorb and disperse the impact energy, thereby reducing the risk of structural failure of the first side surface 131. Therefore, by directly contacting the first side surface 131 with the thermal management component 20, the thermal management component 20 can fully contact the battery cell 10, thereby improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10. At the same time, it can also alleviate the risk of structural failure of the first side surface 131 and the second side surface 132 of the battery cell 10 due to external force impact, thereby improving the reliability of the battery device 2.

[0059] Combine Figure 4 , Figure 4 2 is a second structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0060] In some embodiments, the outer wall 13 includes two first side surfaces 131 connected to the end surface 12 and two second side surfaces 132 connected to the end surface 12. The two first side surfaces 131 are disposed opposite to each other, and the two second side surfaces 132 are disposed opposite to each other. The area of ​​the first side surface 131 is greater than the area of ​​the second side surface 132, and the thermal management component 20 directly contacts the second side surfaces 132. For example, the thermal management component 20 may directly contact the second side surfaces 132 but not the first side surface 131. It is understood that the thermal management component 20 can better exchange heat with the battery cell 10 through the second side surfaces 132 in direct contact therewith. At the same time, when the first side surface 131 or the second side surface 132 is impacted by an external force, the thermal management component 20 can better absorb and disperse the impact energy, thereby reducing the risk of structural failure of the second side surface 132. The thermal management component 20 may be in direct contact with a portion of the second side surface 132 or may completely cover the second side surface 132. Specifically, the thermal management component 20 completely covering the second side surface 132 is beneficial for increasing the contact area between the thermal management component 20 and the battery cell 10, thereby further improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10. Thus, by having the thermal management component 20 directly contact the second side surface 132, the thermal management component 20 can be in full contact with the battery cell 10, thereby improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10, reducing the risk of structural failure of the second side surface 132 of the battery cell 10 due to external impact, and improving the reliability of the battery device 2.

[0061] In some embodiments, the outer wall 13 includes two first side surfaces 131 connected to the end surface 12 and two second side surfaces 132 connected to the end surface 12. The two first side surfaces 131 are disposed opposite each other, and the two second side surfaces 132 are disposed opposite each other. The area of ​​the first side surface 131 is larger than the area of ​​the second side surface 132. The thermal management component 20 directly contacts the first side surfaces 131 and the second side surfaces 132. The thermal management component 20 may also directly contact both the first side surfaces 131 and the second side surfaces 132. The thermal management component 20 may directly contact both the first side surfaces 131 and the second side surfaces 132, or it may completely cover both the first side surfaces 131 and the second side surfaces 132. It will be appreciated that the thermal management component 20 can better exchange heat with the battery cell 10 through the first and second side surfaces 131, 132 with which it directly contacts. Furthermore, when the first and second side surfaces 131, 132 are impacted by external forces, the thermal management component 20 can better absorb and disperse the impact energy, thereby reducing the risk of structural failure of the first and second side surfaces 131, 132. Therefore, by directly contacting the first side 131 and the second side 132 of the thermal management component 20, the thermal management component 20 can fully contact the battery cell 10, thereby improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10, alleviating the risk of structural failure of the first side 131 and the second side 132 of the battery cell 10 due to external force impact, and improving the reliability of the battery device 2.

[0062] Combine Figure 5 , Figure 5 3 is a schematic diagram of the third structure of a battery device according to one or more embodiments of the present application.

[0063] In some embodiments, the outer wall surface 13 includes a bottom surface 133 disposed opposite the end surface 12, and the thermal management component 20 directly contacts the bottom surface 133. It should be noted that the thermal management component 20 can directly contact a portion of the bottom surface 133, or it can completely cover the bottom surface 133. Specifically, the thermal management component 20 completely covering the bottom surface 133 is conducive to increasing the contact area between the thermal management component 20 and the battery cell 10, thereby further improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10. It is understandable that the direct contact of the thermal management component 20 with the bottom surface 133 facilitates the thermal management component 20 to better exchange heat with the battery cell 10 from the bottom surface 133. At the same time, when the bottom surface 133 is impacted by external force, it facilitates the thermal management component 20 to better absorb and disperse the impact energy, thereby reducing the risk of structural failure of the bottom surface 133. Therefore, the thermal management component 20 directly contacts the bottom surface 133 of the battery cell 10, which facilitates full contact between the thermal management component 20 and the battery cell 10, improves the heat exchange efficiency between the thermal management component 20 and the battery cell 10, alleviates the risk of structural failure of the bottom surface 133 of the battery cell 10 due to external force impact, and improves the reliability of the battery device 2.

[0064] Combine Figure 6 , Figure 6 4 is a schematic diagram of the structure of a battery device according to one or more embodiments of the present application.

[0065] In some embodiments, there are multiple battery cells 10, and the thermal management component 20 simultaneously contacts the outer wall surfaces 13 of multiple battery cells 10. The thermal management component 20 can simultaneously contact the same location or different locations on the outer wall surface 13 of each battery cell 10. In some application scenarios, the outer wall surface 13 of the battery cell 10 may include a first side surface 131, a second side surface 132, and a bottom surface 133. The thermal management component 20 may contact the first side surface 131 of some battery cells 10, the second side surface 132 of some battery cells 10, and the bottom surface 133 of some battery cells 10. For example, taking the number of battery cells 10 as six, the thermal management component 20 can contact the first side surfaces 131 of two battery cells 10, contact the second side surfaces 132 of two battery cells 10, and contact the bottom surfaces 133 of two battery cells 10, or only contact the second side surfaces 132 of two of the battery cells 10, and contact the first side surfaces 131 and the second side surfaces 132 of the other four battery cells 10 at the same time, and contact the bottom surfaces 133 of six battery cells 10 at the same time, and so on. It should be noted that the contact method of the thermal management component 20 with the outer wall surfaces 13 of different battery cells 10 can be the same or different. It is understood that the simultaneous contact of the thermal management component 20 with the outer walls 13 of multiple battery cells 10 facilitates sufficient contact between the thermal management component 20 and the multiple battery cells 10. The non-Newtonian fluid 22 can flow along the heat exchange channel 21 and through the multiple battery cells 10, facilitating simultaneous heat exchange between the thermal management component 20 and the multiple battery cells 10. Furthermore, when the battery device 2 is subjected to an external force impact, the thermal management component 20 simultaneously provides protection for the multiple battery cells 10, absorbing and dissipating the impact energy. Thus, by allowing the thermal management component 20 to simultaneously contact the outer walls 13 of multiple battery cells 10, the thermal management component 20 is in sufficient contact with the multiple battery cells 10, improving the efficiency of heat exchange between the thermal management component 20 and the multiple battery cells 10, and further improving the reliability of the battery device 2.

[0066] In some embodiments, multiple battery cells 10 are divided into at least one battery group 100. The multiple battery cells 10 in the same battery group 100 are arranged sequentially. The thermal management component 20 includes a side plate 23, which simultaneously contacts the outer wall surfaces 13 of the multiple battery cells 10 in the same battery group 100. The battery group 100 includes multiple battery cells 10. The number of battery cells 10 in a battery group 100 may be two, three, four, or more. The number of battery groups 100 may also be one, two, three, or more. For example, the total number of battery cells 10 may be six, and these six battery cells 10 may be divided into one battery group 100. Alternatively, three adjacent battery cells 10 in the six battery cells 10 may be divided into one battery group 100, resulting in two battery groups 100 in total, and so on. It will be understood that the heat exchange flow channel 21 may be disposed within the side plate 23 to allow the non-Newtonian fluid 22 in the first state to flow within the side plate 23. The multiple battery cells 10 of the same battery group 100 are arranged in sequence, and the side plates 23 simultaneously contact the outer wall surfaces 13 of the multiple battery cells 10 of the same battery group 100. For example, taking six battery cells 10 as an example of the same battery group 100, the side plates 23 can extend in the arrangement direction of the six battery cells 10, thereby simultaneously contacting the outer wall surfaces 13 of the six battery cells 10. In some other application scenarios, the six battery cells 10 can be divided into two battery groups 100, each battery group 100 including three battery cells 10. The two battery groups 100 can be arranged in a direction perpendicular to the arrangement direction of the battery cells 10. The side plate 23 can be located between the two battery groups 100, with one side of the side plate 23 simultaneously contacting the outer wall surfaces 13 of the three battery cells 10 of one battery group 100, and the other side of the side plate 23 simultaneously contacting the outer wall surfaces 13 of the three battery cells 10 of the other battery group 100. Therefore, the side plate 23 of the thermal management component 20 can fully contact with multiple battery cells 10 of the same battery group 100 at the same time, making it convenient for the thermal management component 20 to perform heat exchange treatment for the battery cells 10 of the same battery group 100 at the same time. The side plate can also alleviate the risk of structural failure of multiple battery cells 10 in the same battery group 100 due to external force impact, thereby improving the reliability of the battery device 2.

[0067] In some embodiments, there are multiple side plates 23, and the multiple side plates 23 are spaced apart, with at least one battery group 100 sandwiched between every two side plates 23. The number of side plates 23 can be two, three, four, or more. The number of battery groups 100 sandwiched between every two side plates 23 can be one, two, or more. For example, one battery group 100 can be sandwiched between two side plates 23, and the multiple battery cells 10 in the battery group 100 can be arranged in sequence in a direction perpendicular to the spacing direction of the two side plates 23. In some application scenarios, two battery groups 100 are sandwiched between two side plates 23, and the multiple battery cells 10 in each battery group 100 are arranged in sequence in a direction perpendicular to the spacing direction of the two side plates 23. The two battery groups 100 can be arranged in a direction perpendicular to the spacing direction of the two side plates 23, or in the spacing direction of the two side plates 23. It can be understood that the two side plates 23 sandwiching the battery group 100 from both sides further increase the contact area between the thermal management component 20 and the multiple battery cells 10, enabling more effective heat exchange with the multiple battery cells 10. At the same time, when subjected to external force, the impact energy can be absorbed and dispersed from both sides of the battery group 100, thereby protecting the battery group 100. Thus, by sandwiching at least one group of battery groups 100 between two spaced-apart side plates 23, the two spaced-apart side plates 23 can fully contact the battery group 100 from both sides of the at least one group of battery groups 100, providing support and protection for the battery group 100 from both sides, thereby improving the heat exchange efficiency between the thermal management component 20 and the battery group 100 and further mitigating the risk of structural failure of the battery group 100 due to external force impacts on both sides.

[0068] In some embodiments, the thermal management component 20 includes a manifold 25, which is connected to multiple side plates 23. The manifold 25 can connect multiple side plates 23 and guide the non-Newtonian fluid 22 in the first state to flow between the multiple side plates 23. For example, the manifold 25 can connect two adjacent side plates 23 in sequence in the spacing direction of the multiple side plates 23, so that the non-Newtonian fluid 22 is evenly distributed among the multiple side plates 23, thereby improving the fluidity of the non-Newtonian fluid 22 in the first state and alleviating the risk of poor heat exchange effect caused by the retention of the non-Newtonian fluid 22. As a result, the non-Newtonian fluid 22 can flow between the multiple side plates 23 through the manifold 25, thereby improving the fluidity of the non-Newtonian fluid 22 in the thermal management component 20, facilitating better heat exchange between the thermal management component 20 and the battery cell 10, and improving the heat exchange efficiency between the thermal management component 20 and the battery cell 10.

[0069] Combine Figure 7 , Figure 7 Schematic cross-section of a heat exchange channel of a battery device according to one or more embodiments of the present application.

[0070] In some embodiments, a plurality of spaced ribs 211 are provided in the heat exchange channel 21, and the plurality of ribs 211 divide the heat exchange channel 21 into a plurality of guide grooves 212. For example, the plurality of ribs 211 can extend along the extension direction of the heat exchange channel 21 and be arranged at intervals in the heat exchange channel 21. The guide grooves 212 can be formed between two adjacent ribs 211 and between the ribs 211 and the side walls of the heat exchange channel 21. The guide grooves 212 can be used to guide the flow of the non-Newtonian fluid 22 in the first state. It is understood that the non-Newtonian fluids 22 between different guide grooves 212 are separated from each other and flow relatively independently, which is conducive to improving the fluidity of the non-Newtonian fluid 22. Thus, the heat exchange channel 21 is divided into multiple guide grooves 212 by multiple ribs 211, which facilitates the independent flow of the non-Newtonian fluid 22 in different guide grooves 212, thereby improving the fluidity of the non-Newtonian fluid 22 in the heat exchange channel 21, thereby improving the heat exchange efficiency between the non-Newtonian fluid 22 and the battery cell 10.

[0071] In some embodiments, the non-Newtonian fluid 22 is filled with a thermally conductive filler. The thermally conductive filler may include, but is not limited to, boron nitride, aluminum nitride, thermally conductive graphite, carbon nanotubes, silicon oxide, silicon carbide, and the like. The thermally conductive filler can increase the thermal conductivity of the non-Newtonian fluid 22, thereby improving the heat exchange efficiency between the non-Newtonian fluid 22 and the battery cells 10. Thus, by filling the non-Newtonian fluid 22 with the thermally conductive filler, the thermal conductivity of the non-Newtonian fluid 22 is increased, thereby improving the heat exchange efficiency between the non-Newtonian fluid 22 and the battery cells 10.

[0072] Combine Figure 8 , Figure 8 is a fifth structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0073] In some embodiments, the outer wall 13 includes two first side surfaces 131 connected to the end surfaces 12 and a second side surface 132 connected to the two end surfaces 12. The two first side surfaces 131 are disposed opposite each other, and the two second side surfaces 132 are disposed opposite each other. The area of ​​the first side surface 131 is greater than the area of ​​the second side surface 132. The multiple battery cells 10 in the same battery group 100 are arranged in sequence in a direction perpendicular to the first side surfaces 131, and the side plate 23 simultaneously contacts the second side surfaces 132 of the multiple battery cells 10 in the same battery group 100. For example, taking the number of battery cells 10 in the same battery group 100 as six, the six battery cells 10 are arranged in sequence in a direction perpendicular to the first side surfaces 131. Two adjacent battery cells 10 can contact each other through the opposing first side surfaces 131. The side plate 23 can extend in a direction perpendicular to the first side surfaces 131 and simultaneously directly contact the second side surface 132 of each of the six battery cells 10. It is understood that the simultaneous contact of the side plates 23 with the second side surfaces 132 of the multiple battery cells 10 in the same battery group 100 facilitates better heat exchange between the thermal management component 20 and the multiple battery cells 10 in the same battery group 100, and better absorbs and disperses energy at the second side surfaces 132 of the multiple battery cells 10 when subjected to external force, thereby reducing the risk of structural failure of the second side surfaces 132 of the battery cells 10 in the battery group 100. Thus, by the simultaneous contact of the side plates 23 with the second side surfaces 132 of the multiple battery cells 10 in the same battery group 100, the side plates 23 are in full contact with the smaller second side surfaces 132 of the battery cells 10, thereby improving the efficiency of heat exchange between the thermal management component 20 and the multiple battery cells 10, mitigating the risk of structural failure of the second side surfaces 132 of the battery cells 10 due to external force, and improving the reliability of the battery device 2.

[0074] Combine Figure 9 , Figure 9 is a sixth structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0075] In some embodiments, the outer wall 13 includes two first side surfaces 131 connected to the end surfaces 12 and a second side surface 132 connected to the two end surfaces 12. The two first side surfaces 131 are disposed opposite each other, and the two second side surfaces 132 are disposed opposite each other. The area of ​​the first side surface 131 is greater than the area of ​​the second side surface 132. The multiple battery cells 10 in the same battery group 100 are arranged in sequence in a direction perpendicular to the second side surfaces 132, and the side plate 23 simultaneously contacts the first side surfaces 131 of the multiple battery cells 10 in the same battery group 100. For example, taking the number of battery cells 10 in the same battery group 100 as six, the six battery cells 10 are arranged in sequence in a direction perpendicular to the second side surfaces 132. Two adjacent battery cells 10 can contact each other through the second side surfaces 132 that oppose each other. The side plate 23 can extend in a direction perpendicular to the second side surfaces 132 and simultaneously directly contact the first side surface 131 of each of the six battery cells 10. It can be understood that the simultaneous contact of the side plates 23 with the first side surfaces 131 of multiple battery cells 10 in the same battery group 100 facilitates better heat exchange between the thermal management component 20 and the multiple battery cells 10 in the same battery group 100, and better absorbs and disperses energy at the first side surfaces 131 of the multiple battery cells 10 when subjected to external force, thereby reducing the risk of structural failure of the first side surfaces 131 of the battery cells 10 in the battery group 100. Thus, by the simultaneous contact of the side plates 23 with the larger first side surfaces 131 of the multiple battery cells 10 in the same battery group 100, the contact area between the side plates 23 and the multiple battery cells 10 in the same battery group 100 is increased, improving the efficiency of simultaneous heat exchange between the thermal management component 20 and the multiple battery cells 10, while mitigating the risk of structural failure of the first side surfaces 131 of the battery cells 10 due to external force, thereby improving the reliability of the battery device 2.

[0076] Combine Figure 10 , Figure 10 is a seventh structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0077] In some embodiments, the outer wall surface 13 includes a bottom surface 133 disposed opposite the end surface 12, and the thermal management component 20 includes a bottom plate 24, and the bottom surfaces 133 of the multiple battery cells 10 are in contact with the bottom plate 24 at the same time. The bottom plate 24 can also be used to support the multiple battery cells 10. It is understood that the heat exchange channel 21 can be provided in the side plate 23 so that the non-Newtonian fluid 22 in the first state flows in the side plate 23. The bottom plate 24 can extend along the arrangement direction of the multiple battery cells 10, thereby contacting the bottom surfaces 133 of the multiple battery cells 10. As a result, the bottom plate 24 of the thermal management component 20 can be in full contact with the bottom surfaces 133 of the multiple battery cells 10 at the same time, thereby improving the heat exchange efficiency of the thermal management component 20 and the multiple battery cells 10 at the same time, further alleviating the risk of structural failure of the bottom surfaces 133 of the multiple battery cells 10 due to external force impact, and improving the reliability of the battery device 2.

[0078] In summary, the battery device 2 provided in this application includes a battery cell 10 and a thermal management component 20. The thermal management component 20 is in direct contact with the battery cell 10 and is provided with a heat exchange channel 21 containing a non-Newtonian fluid 22. The non-Newtonian fluid 22 can transition from a first state to a second state under the action of an external force. The fluidity of the non-Newtonian fluid 22 in the first state is greater than that in the second state. The non-Newtonian fluid 22 in the first state is configured to flow within the heat exchange channel 21. Thus, the non-Newtonian fluid 22 in the first state can flow within the heat exchange channel 21 and can exchange heat with the battery cell 10 through the non-Newtonian fluid 22 in the first state. Furthermore, the non-Newtonian fluid 22 can transition to the second state when subjected to an external force. The fluidity of the non-Newtonian fluid 22 in the second state is less than that in the first state. The non-Newtonian fluid in the second state can absorb and disperse the external force impact, thereby protecting the battery cell 10, strengthening the overall structural strength of the battery device 2, and reducing the risk of structural failure of the battery device 2 under external force impact, thereby improving the reliability of the battery device 2. Compared with other types of battery devices 2, the battery device 2 of the present application has higher structural strength and better reliability.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Battery cells; A thermal management component is in direct contact with the battery cell. The thermal management component is provided with a heat exchange flow channel. The heat exchange flow channel contains a non-Newtonian fluid. The non-Newtonian fluid can be converted from a first state to a second state under the action of an external force. The fluidity of the non-Newtonian fluid in the first state is greater than the fluidity in the second state. The non-Newtonian fluid in the first state is used to flow in the heat exchange flow channel; a plurality of ribs are provided at intervals in the heat exchange flow channel, and the plurality of ribs divide the heat exchange flow channel into a plurality of guide grooves.

2. The battery device according to claim 1, wherein: The battery cell includes a pole, an end face, and an outer wall face, wherein the outer wall face is connected to the end face, the pole is arranged on the end face, and the thermal management component directly contacts the outer wall face.

3. The battery device according to claim 2, characterized in that The outer wall surface includes two first side surfaces connected to the end surface and two second side surfaces connected to the end surface, the two first side surfaces are arranged back to back, the two second side surfaces are arranged back to back, the area of ​​the first side surface is larger than the area of ​​the second side surface, and the thermal management component directly contacts the first side surface and / or the second side surface.

4. The battery device according to claim 2, wherein: The outer wall surface includes a bottom surface disposed opposite to the end surface, and the heat management component directly contacts the bottom surface.

5. The battery device according to claim 2, wherein: There are a plurality of battery cells, and the heat management component contacts the outer wall surfaces of the plurality of battery cells simultaneously.

6. The battery device according to claim 5, characterized in that The plurality of battery cells are divided into at least one battery group, and the plurality of battery cells in the same battery group are arranged in sequence. The thermal management component includes a side plate, and the side plate contacts the outer wall surfaces of the plurality of battery cells in the same battery group at the same time.

7. The battery device according to claim 6, characterized in that There are a plurality of side plates, which are spaced apart, and at least one battery group is sandwiched between every two side plates.

8. The battery device according to claim 7, characterized in that The heat management component includes a manifold communicating with the plurality of side plates.

9. The battery device according to claim 6, characterized in that The outer wall surface includes two first side surfaces connected to the end surfaces and a second side surface connected to the two end surfaces, the two first side surfaces are arranged back to back, the two second side surfaces are arranged back to back, the area of ​​the first side surface is larger than the area of ​​the second side surface, and the multiple battery cells of the same group of battery groups are arranged in sequence along a direction perpendicular to the first side surfaces, and the side plate simultaneously contacts the second side surfaces of the multiple battery cells of the same group of battery groups.

10. The battery device according to claim 6, wherein: The outer wall surface includes two first side surfaces connected to the end surfaces and a second side surface connected to the two end surfaces, the two first side surfaces are arranged back to back, the two second side surfaces are arranged back to back, the area of ​​the first side surface is larger than the area of ​​the second side surface, the multiple battery cells of the same group of battery groups are arranged in sequence along a direction perpendicular to the second side surfaces, and the side plate simultaneously contacts the first side surfaces of the multiple battery cells of the same group of battery groups.

11. The battery device according to claim 5, characterized in that The outer wall surface includes a bottom surface disposed opposite to the end surface, the thermal management component includes a bottom plate, and the bottom surfaces of the plurality of battery cells are in contact with the bottom plate at the same time.

12. The battery device according to claim 5, characterized in that The non-Newtonian fluid is filled with a heat-conducting filler.

13. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 12.

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