Battery device and electric device

Abstract

Disclosed in the present application are a battery device (1) and an electric device. The battery device (1) comprises a plurality of battery units (100), each battery unit (100) comprising a plurality of battery cells (10). The plurality of battery units (100) include a first battery unit (100a) and a second battery unit (100b) which are stacked adjacent to each another in the direction of gravity (z), wherein the plurality of battery cells (10) of the first battery unit (100a) are sequentially arranged in a first direction (x), and the plurality of battery cells (10) of the second battery unit (100b) are sequentially arranged in a second direction (y), the first direction (x) being perpendicular to the second direction (y). Thus, the structural strength, stiffness, reliability and stability of the battery device (1) can be improved, so that the number of reinforcing members for enhancing stiffness can be reduced, thereby improving the space utilization rate and energy density of the battery device (1).

Description

Battery devices and electrical appliances Technical Field

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

[0002] In some cases, the battery device includes multiple battery cells stacked sequentially along the direction of gravity, and each battery cell includes multiple individual battery cells arranged sequentially along a first direction. However, this results in poor stiffness of the battery device in the first direction.

[0003] Application content

[0004] This application provides a battery device designed to address the problem of poor stiffness in a first direction.

[0005] The technical solution adopted in the embodiments of this application is:

[0006] In a first aspect, a battery device is provided, the battery device comprising:

[0007] Multiple battery units, each battery unit comprising multiple individual battery cells, including a first battery unit and a second battery unit stacked adjacent to each other along the direction of gravity, wherein the multiple individual battery cells of the first battery unit are arranged sequentially along a first direction, and the multiple individual battery cells of the second battery unit are arranged sequentially along a second direction, wherein the first direction and the second direction are perpendicular.

[0008] The battery device provided in this application embodiment can be designed by using at least one set of two battery units stacked adjacent to each other along the direction of gravity, employing a first battery unit and a second battery unit design. The battery cells of the first battery unit are arranged sequentially along a first direction, and the battery cells of the second battery unit are arranged sequentially along a second direction, such that the arrangement direction of the battery cells in the second battery unit is perpendicular to the arrangement direction of the battery cells in the first battery unit. This creates a crisscrossing arrangement of battery cells between the second and first battery units, resulting in a matrix-like distribution of connection and support points between them. Based on this, in the direction of gravity, either the first or second battery unit can reliably support the other. Furthermore, in both the first and second directions, the first and second battery units can have numerous matrix-like connection and support points, providing numerous crisscrossing stress dispersion paths. Therefore, the first and second battery units can jointly form a complex and stable support structure, effectively dispersing and resisting stress. This improves the overall structural strength, stiffness, reliability, and stability of both battery units, particularly enhancing their combined stiffness in the first direction. Consequently, the overall structural strength, stiffness, reliability, and stability of the battery device are improved, especially its overall stiffness in the first direction. Furthermore, due to the increased combined stiffness of the first and second battery units, the need for additional stiffening components around them can be eliminated. This reduces the number of stiffening components required and the space occupied, thus improving the space utilization and energy density of the battery device.

[0009] In some embodiments, a plurality of second battery cells are arranged in the same layer and spaced apart along a first direction.

[0010] By adopting the above scheme, and arranging multiple second battery units on the same layer with intervals along the first direction, the multiple second battery units on the same layer can provide more connection points and support points in the first direction, effectively distributing and bearing the stress in the first direction. Based on this, the multiple second battery units on the same layer can collectively provide reliable and stable support for adjacent first battery units, thereby enhancing the rigidity and structural stability of the entire battery device in the first direction. This embodiment is particularly suitable for battery devices with a large dimension in the first direction.

[0011] In some embodiments, at least a portion of the first battery cell and at least a portion of the second battery cell are alternately arranged along the direction of gravity.

[0012] By adopting the above scheme, a multi-layered, crisscrossing support network can be formed within the entire battery device through alternating arrangement of the first and second battery units. This network structure effectively resists forces and torques from all directions, significantly enhancing the overall structural strength, stiffness, reliability, stability, and durability of the battery device. Furthermore, it greatly reduces the need for reinforcing components to enhance stiffness, minimizing their number and space requirements, thereby improving the space utilization and energy density of the battery device. Moreover, based on the arrangement of this embodiment, the battery units are arranged in a regular pattern, facilitating automated assembly and testing, thus improving the production efficiency and reducing the cost of the battery device.

[0013] In some embodiments, a battery cell includes a casing and electrode terminals;

[0014] In at least one battery cell, an electrode terminal is disposed on one side of the housing along the height direction of the battery cell. The housing includes a first wall, which includes a main body and a recess. The recess is recessed toward the interior of the housing relative to the main body, and the electrode terminal is disposed in the recess.

[0015] By adopting the above solution, at least one battery cell can have its electrode terminals located on one side of the casing along the height direction of the battery cell, with a recess in the casing providing mounting space for the electrode terminals. This allows the electrode terminals to be partially or completely accommodated within the recess, reducing the size of the electrode terminals protruding from the main body. Based on this, the battery cell can reduce protruding portions along its height direction, reducing the additional space required by the electrode terminals in the direction of gravity, compressing the overall size and space occupied, thereby improving the space utilization and energy density of the battery device. Furthermore, since the electrode terminals are partially or completely accommodated in the recess, the risk of damage to the electrode terminals due to external impacts or compression is reduced, thus improving the reliability and lifespan of the battery cell. The recess also provides clear positioning for the electrode terminals, making the installation position and state of the electrode terminals more stable and reliable, thereby optimizing the battery cell assembly process and improving the ease of assembly, efficiency, and production efficiency of the battery cell.

[0016] In some embodiments, the electrode terminals do not protrude from the body portion.

[0017] By adopting the above solution, based on the previous embodiment, at least one battery cell allows its electrode terminals to be completely accommodated within the recess without protruding from the main body. Therefore, in the height direction of the battery cell, it can directly access the main body of the first wall of the casing, providing a flat, high-strength abutment support surface to reliably abut and support other components, and reliably withstand stress and torque. This improves the battery cell's strength, stiffness, reliability, and durability, thus enhancing the overall strength, stiffness, reliability, and durability of the battery device. Furthermore, the space occupied by the battery cell is essentially equal to that of the casing, reducing its size and footprint. This facilitates close arrangement of the battery cell with other battery cells, improving the space utilization and energy density of the battery device. Moreover, since all electrode terminals are accommodated within the recess, the risk of damage to the electrode terminals due to external impact or compression is significantly reduced, thereby improving the reliability and lifespan of the battery cell.

[0018] In some embodiments, a battery cell includes an electrode terminal; the electrode terminal of at least one battery cell is disposed on the end side of the battery cell along its length direction.

[0019] By adopting the above-described scheme, at least one battery cell can have its electrode terminals located at the end of the battery cell along its length, thus avoiding the wall portion of the casing along the height direction of the battery cell. Based on this, the battery cell can directly provide a flat, high-strength abutment support surface via the wall portion of the casing along its height direction, reliably abutting and supporting other components (e.g., other battery cells) and reliably withstanding stress and torque. This improves the battery cell's strength, stiffness, reliability, and durability, thereby enhancing the overall strength, stiffness, reliability, and durability of the battery device. Furthermore, since the electrode terminals are located at the end of the battery cell along its length, the casing can omit the need for recesses to accommodate the electrode terminals, simplifying the casing design and reducing the processing cost of the battery cell.

[0020] In some embodiments, a battery cell includes a pressure relief mechanism; the pressure relief mechanism of at least one battery cell is located at one end of the battery cell along its length.

[0021] By adopting the above scheme, at least one battery cell can have a pressure relief mechanism located at one end along the length of the battery cell. This means that the battery cell primarily needs to have a venting space at its end along its length, eliminating the need for venting spaces at its sides along its height or thickness. This facilitates close arrangement of the battery cell with adjacent cells along its thickness and direct contact and support with other battery cells along its height. This improves the strength, rigidity, reliability, and durability of the entire battery device, as well as its space utilization and energy density.

[0022] In some embodiments, the battery device includes a support member stacked between two adjacent battery cells arranged along the direction of gravity.

[0023] By adopting the above scheme, by stacking support members between two adjacent battery cells along the direction of gravity, the two adjacent stacked battery cells can be provided with support and protection. This can reduce the downward displacement and deformation of the battery cell located on the upper side, absorb and disperse stress, thereby improving the strength, stiffness, reliability, stability and durability of the entire battery device, especially improving the overall stiffness of the battery device in the first direction.

[0024] In some embodiments, the support is a thermal management component.

[0025] By adopting the above solution, when the battery device includes a support member, the support member can be made a thermal management component. This allows the support member to both support two adjacent battery cells along the direction of gravity and exchange heat with the individual cells of the two adjacent battery cells along the direction of gravity. Based on this, the support member can provide structural support while simultaneously exchanging heat with the individual cells of adjacent battery cells to maintain the temperature of the battery cells within a suitable range. This improves the strength, rigidity, reliability, stability, and durability of the entire battery device, while also optimizing its thermal management performance and efficiency, thereby enhancing the reliability and lifespan of the battery device. Furthermore, combining the support member and the thermal management component into one unit helps reduce the number of components in the battery device, improving space utilization and energy density.

[0026] In some embodiments, a battery cell includes a casing and electrode terminals;

[0027] In at least one battery cell, an electrode terminal is disposed on one side of the housing along the height direction of the battery cell. The housing includes a first wall, which includes a main body and a recess. The recess is recessed toward the interior of the housing relative to the main body. The electrode terminal is disposed in the recess, and the main body abuts against a corresponding support member.

[0028] By adopting the above scheme, the battery cell with electrode terminals located in the recess of the first wall can be provided with a flat abutment support surface with better bearing strength through the main body to abut against the corresponding support member, thereby reliably bearing stress and torque, effectively dispersing stress, thereby improving the bearing strength, stiffness, reliability and durability of the battery cell, which is conducive to improving the strength, stiffness, reliability and durability of the entire battery device.

[0029] In some embodiments, two adjacent battery cells of the same battery cell are bonded together.

[0030] By adopting the above scheme, adjacent battery cells within the same battery unit are bonded together, a strong physical connection is formed between adjacent battery cells. Even if some battery cells within the unit experience weaker bottom support (e.g., due to the concave portion of the corresponding bottom cell), these cells can still be reliably supported by the other battery cells due to the bonding, reducing localized sinking and deformation. This improves the overall structural strength, stability, reliability, and stiffness of the battery unit, helping it resist external impacts and vibrations. Furthermore, bonding adjacent battery cells increases the compactness of the battery unit arrangement, reducing wasted space and thus improving the overall space utilization and energy density of the battery device.

[0031] In some embodiments, a battery cell includes a housing and an electrode assembly disposed within the housing;

[0032] Along the thickness direction of the battery cell, the electrode assembly occupies 90% to 100% of the casing.

[0033] By adopting the above scheme, the electrode assembly can occupy a larger margin within the casing along the thickness direction of the battery cell, resulting in a greater degree of filling of the electrode assembly relative to the internal space of the casing. Consequently, the electrode assembly fills the battery cell casing more fully and tightly along the thickness direction, providing more internal support and increasing the solidity of the battery cell in the thickness direction. This enhances the battery cell's strength, stiffness, reliability, and durability, thereby improving the overall strength, stiffness, reliability, and durability of the battery device. Furthermore, a high fill rate electrode assembly means that more active material is encapsulated within the battery cell, thus increasing the energy density of the battery cell and consequently, the energy density of the entire battery device.

[0034] In some embodiments, a battery cell includes a housing, electrode terminals, and an electrode assembly disposed within the housing;

[0035] The electrode terminals are located on one side of the casing along the height direction of the battery cell. Along the length direction of the battery cell, the electrode assembly occupies 90% to 100% of the casing.

[0036] Alternatively, the electrode terminals are located on the end side of the casing along the length of the battery cell, and the electrode assembly occupies 80% to 100% of the casing along the length of the battery cell.

[0037] By adopting the above scheme, whether the electrode terminals are located on one side of the casing along the height direction of the battery cell or on the other side of the casing along the length direction of the battery cell, the electrode assembly occupies a larger margin within the casing along the length direction of the battery cell, resulting in a greater filling degree of the electrode assembly relative to the internal space of the casing. Based on this, the electrode assembly fills the battery cell casing more fully and tightly along the length direction, providing more internal support. This increases the solidity of the battery cell along its length, enhancing its strength, rigidity, reliability, and durability, thus improving the overall strength, rigidity, reliability, and durability of the battery device. Furthermore, a high filling rate electrode assembly means that more active material is encapsulated within the battery cell, thereby increasing the energy density of the battery cell and ultimately improving the energy density of the entire battery device.

[0038] In some embodiments, a battery cell includes a housing, electrode terminals, and an electrode assembly disposed within the housing;

[0039] The electrode terminals are located on one side of the casing along the height direction of the battery cell. Along the height direction of the battery cell, the electrode assembly occupies 80% to 100% of the casing.

[0040] Alternatively, the electrode terminals are located on the end side of the casing along the length of the battery cell, and along the height of the battery cell, the electrode assembly occupies 90% to 100% of the casing.

[0041] By adopting the above scheme, whether the electrode terminals are located on one side of the casing along the height direction of the battery cell or on the end side of the casing along the length direction of the battery cell, the electrode assembly occupies a larger margin within the casing along the height direction of the battery cell, resulting in a greater filling degree of the electrode assembly relative to the internal space of the casing. Based on this, the electrode assembly fills the battery cell casing more fully and tightly along the height direction, providing more internal support. This increases the solidity of the battery cell along its height, enhancing its strength, rigidity, reliability, and durability, thus improving the overall strength, rigidity, reliability, and durability of the battery device. Furthermore, a high filling rate electrode assembly means that more active material is encapsulated within the battery cell, thereby increasing the energy density of the battery cell and ultimately improving the energy density of the entire battery device.

[0042] In some embodiments, the battery cell includes a casing, which includes at least one of steel, aluminum, and titanium materials.

[0043] By adopting the above solution, the material of the battery cell's casing can be optimized, resulting in better corrosion resistance, strength, and rigidity. This allows the casing to provide robust protection for components such as electrode assemblies and to reliably support other battery cells, thereby improving the battery cell's strength, rigidity, reliability, and durability. This, in turn, enhances the overall strength, rigidity, reliability, and durability of the battery device. Furthermore, the design of this embodiment facilitates the welding and forming of the casing itself, thus simplifying the processing and shaping of the battery cells.

[0044] In some embodiments, the battery cell includes a casing with a wall thickness of 0.1 mm to 0.8 mm.

[0045] By adopting the above scheme, the wall thickness of the outer casing can be made moderate. Based on this, on the one hand, the casing has sufficient wall thickness and rigidity, enabling the casing of the battery cell to provide robust protection for components such as electrode assemblies, and to provide reliable support for other battery cells. This improves the strength, rigidity, reliability, and durability of the battery cells, thus enhancing the overall strength, rigidity, reliability, and durability of the battery device. On the other hand, the casing wall thickness is prevented from being excessive, reducing the space occupied by the casing. This provides more space for the active materials inside the battery cells, improving the space utilization and energy density of the battery cells, and consequently, the overall space utilization and energy density of the battery device.

[0046] In some embodiments, the battery cell includes a casing, the casing having a Vickers hardness of 10 to 400.

[0047] By adopting the above scheme, the Vickers hardness of the outer casing can be moderate. Based on this, on the one hand, the casing can possess sufficient hardness and rigidity, enabling the battery cell casing to provide robust protection for components such as electrode assemblies and to provide reliable support for other battery cells. This improves the strength, rigidity, reliability, and durability of the battery cells, thus enhancing the overall strength, rigidity, reliability, and durability of the battery device. On the other hand, it also allows the casing to have good plasticity, facilitating its processing and shaping. This improves the ease of processing and shaping the battery cells, increasing production efficiency and reducing production costs.

[0048] Secondly, an electrical device is provided, which includes the battery device provided in the embodiments of this application.

[0049] By adopting the above solution, the electrical device can improve its structural reliability, space utilization and energy density by using the battery device provided in the embodiments of this application. Attached Figure Description

[0050] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0052] Figure 2 is an exploded view of a battery device provided in some embodiments of this application;

[0053] Figure 3 is an exploded view of a battery cell provided in some embodiments of this application;

[0054] Figure 4 is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0055] Figure 5 is a schematic diagram of the structure of a battery cell provided in some embodiments of this application, wherein the electrode terminals are located on one side of the casing along the height direction of the battery cell;

[0056] Figure 6 is a schematic diagram of the structure of a battery cell provided in some other embodiments of this application, wherein the electrode terminals of the battery cell are located on the end side of the battery cell along its own length direction.

[0057] In the figures, the following labels are used: 1-Battery device, 2-Controller, 3-Motor; 100-Battery unit, 200-Casing, 201-First part, 202-Second part; 10-Battery cell, 11-Casing, 111-Housing, 112-End cap, 113-First wall, 1131-Main body, 1132-Recess; 12-Electrode assembly, 121-Electrode body, 122-Taper, 122a-Positive electrode tab, 122b-Negative electrode tab; 13-Insulation Components; 14-Electrode terminal, 14a-Positive electrode terminal, 14b-Negative electrode terminal; 15-Adapter, 15a-Positive adapter, 15b-Negative adapter; 16-Pressure relief mechanism; 100a-First battery unit, 100b-Second battery unit; 300-Support component; x-First direction, y-Second direction, z-Gravity direction; a-Length direction of battery cell, b-Thickness direction of battery cell, c-Height direction of battery cell. Detailed Implementation

[0058] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clear, the application will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions.

[0059] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] A battery device is a modular structure comprising at least two battery cells to provide higher voltage and capacity; for example, it can be a battery module, battery pack, or battery assembly. In some cases, a battery device includes multiple battery cells stacked sequentially along the direction of gravity, with each battery cell comprising multiple battery cells arranged sequentially along a first direction. However, this results in poor rigidity of the battery device in the first direction. To address this, battery devices typically enhance their structural rigidity by adding reinforcing members around each battery cell; however, these reinforcing members occupy additional space in the battery device, leading to reduced space utilization.

[0063] Therefore, some embodiments of this application provide a battery device that employs a design of a first battery unit and a second battery unit by stacking at least one set of two battery cells adjacent to each other along the direction of gravity. The first battery unit has multiple battery cells arranged sequentially along a first direction, and the second battery unit has multiple battery cells arranged sequentially along a second direction, such that the arrangement direction of the battery cells in the second battery unit is perpendicular to the arrangement direction of the battery cells in the first battery unit. This creates a crisscrossing arrangement of battery cells between the second and first battery units, resulting in a matrix-like distribution of connection and support points between them. Based on this, in the direction of gravity, one of the first and second battery units can reliably support the other. Furthermore, in the first and second directions, the first and second battery units can have numerous matrix-like connection and support points, providing numerous crisscrossing stress dispersion paths. Therefore, the first and second battery units can jointly form a complex and stable support structure, effectively dispersing and resisting stress. This improves the overall structural strength, stiffness, reliability, and stability of both battery units, particularly enhancing their combined stiffness in the first direction. Consequently, the overall structural strength, stiffness, reliability, and stability of the battery device are improved, especially its overall stiffness in the first direction. Furthermore, due to the increased combined stiffness of the first and second battery units, the need for additional stiffening components around them can be eliminated. This reduces the number of stiffening components required and the space occupied, thus improving the space utilization and energy density of the battery device.

[0064] The battery devices disclosed in this application can be used in electrical devices that use the battery device as a power source, or in various energy storage systems that use the battery device as an energy storage element. Electrical devices can be, but are not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0065] To illustrate the technical solution provided in this application, the following detailed description is provided in conjunction with specific drawings and embodiments, taking "an electrical device as a vehicle" as an example.

[0066] Please refer to Figure 1, which is a schematic diagram of the vehicle structure provided in some embodiments of this application. The vehicle 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 1 is installed inside the vehicle, and the battery device 1 can be located at the bottom, front, or rear of the vehicle. The battery device 1 is used to supply power to the vehicle; for example, the battery device 1 can serve as the vehicle's operating power source. The vehicle may also include a controller 2 and a motor 3. The controller 2 is used to control the battery device 1 to supply power to the motor 3, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0067] In some embodiments of this application, the battery device 1 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.

[0068] Please refer to Figure 2, which is an exploded view of the battery device 1 provided in some embodiments of this application. The battery device 1 includes a battery cell 100 and a housing 200, with the battery cell 100 housed within the housing 200.

[0069] The housing 200 provides a space for the battery unit 100 and other components. The housing 200 can protect the battery unit 100 and other components inside from dust, water, and dirt, and can reduce the impact of external liquids or other foreign objects on the effectiveness and performance of the battery unit 100 and other components, and can effectively extend the service life of the battery device 1.

[0070] The housing 200 can adopt various structures. In some embodiments, the housing 200 may include a first portion 201 and a second portion 202, which overlap each other, and together define a receiving space for accommodating the battery unit 100. The second portion 202 may be a hollow structure with one end open, and the first portion 201 may be a plate-like structure, with the first portion 201 covering the open side of the second portion 202 so that the first portion 201 and the second portion 202 together define the receiving space; the first portion 201 and the second portion 202 may also be hollow structures with one side open, with the open side of the first portion 201 covering the open side of the second portion 202.

[0071] The box 200 can be of various shapes, such as a cylinder or a cuboid.

[0072] The enclosure 200 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0073] Battery cell 100 is an energy storage unit capable of converting chemical energy into electrical energy. In battery device 1, one battery cell 100 may be provided, or at least two battery cells 100 may be provided. When at least two battery cells 100 are provided, the at least two battery cells 100 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that at least two battery cells 100 are connected in both series and parallel.

[0074] The battery unit 100 may include at least two individual battery cells. These at least two individual battery cells may be directly connected in series, parallel, or a combination thereof, and then the entire assembly of the at least two individual battery cells is housed within the casing 200. The individual battery cells may be lithium-ion rechargeable battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc. The individual battery cells may be cylindrical, flat, cuboid, or other shapes, etc. Different packaging methods may be used to form cylindrical battery cells, square battery cells, or pouch battery cells, etc.

[0075] Alternatively, the battery cell 100 can be a battery module or battery assembly. That is, at least two battery cells can be connected in series, parallel, or in a hybrid configuration to form a modular structure (i.e., a battery module or battery assembly); at least two battery modules or battery assemblies can then be connected in series, parallel, or in a hybrid configuration to form a whole, which is housed within the housing 200.

[0076] Of course, the battery device 1 may also include other structures. For example, the battery device 1 may also include a busbar (not shown) for realizing electrical connection between at least two battery cells 100. As another example, the battery device 1 may also include a power distribution device (not shown) for acting as a control unit for distributing the energy of the battery device 1 and for distributing high voltage to the battery device 1.

[0077] Of course, in some embodiments, the battery device 1 may not include the housing 200, but instead, at least two battery cells are electrically connected and assembled into an integral whole by necessary fixing structures (such as end plates, side plates, restraint straps, etc.) and then assembled into the power-consuming device.

[0078] Please refer to Figure 3, which is an exploded view of a battery cell 10 provided in some embodiments of this application. The battery cell 10 is the smallest unit for storing and outputting electrical energy. The battery cell 10 includes components such as a housing 11, an electrode assembly 12, an insulator 13, electrode terminals 14, an adapter 15, a pressure relief mechanism 16, and an electrolyte (not shown in the figure).

[0079] The outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. The outer casing 11 may include a housing 111 and an end cap 112. The end cap 112 is a component that closes onto the opening of the housing 111 to isolate the internal environment of the battery cell 10 from the external environment. In some embodiments, the shape of the end cap 112 may be adapted to the shape of the housing 111 to fit the housing 111. In some embodiments, the end cap 112 may be made of a material with a certain degree of hardness and strength, so that the end cap 112 is not easily deformed under pressure or impact, enabling the battery cell 10 to have high structural strength and reliability. The material of the end cap 112 can be diverse, including copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0080] The housing 111 is a component used to cooperate with the end cap 112 to form the internal environment of the battery cell 10. The internal environment formed by the housing 111 and the end cap 112 can be used to accommodate components such as the electrode assembly 12, the insulating component 13, and the electrolyte. In some embodiments, the housing 111 and the end cap 112 can be independent components, with an opening provided on the housing 111. The end cap 112 closes the opening to form the internal environment of the battery cell 10. In some embodiments, the end cap 112 and the housing 111 can also be integrated. Specifically, the end cap 112 and the housing 111 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 111, the end cap 112 closes the housing 111. The housing 111 can be of various shapes and sizes, such as a cuboid, a cylinder, or a hexagonal prism. The shape of the housing 111 can be determined according to the shape and size of the electrode assembly 12. The shell 111 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0081] Electrode assembly 12 is the component in the battery cell 10 where the electrochemical reaction occurs. The housing 11 may include one or at least two electrode assemblies 12. Electrode assembly 12 includes a positive electrode (not shown), a negative electrode (not shown), and a separator (not shown), the separator separating the positive and negative electrode. The positive electrode, separator, and negative electrode can be formed into electrode assembly 12 by winding, stacking, or other methods. In electrode assembly 12, the active material portions of both the positive and negative electrode constitute the electrode body 121 of electrode assembly 12, and the non-active material portions of both the positive and negative electrode each constitute a tab 122, which is the current transmission terminal of electrode assembly 12 for transmitting current. The tab 122 of the positive electrode is called positive tab 122a, and the tab 122 of the negative electrode is called negative tab 122b. The positive tab 122a and the negative tab 122b can be located together at one end of the electrode body 121 or at both ends of the electrode body 121 respectively.

[0082] The electrolyte is a liquid that wets the electrode assembly 12. The battery cell 10 primarily functions by the movement of active ions between the positive and negative electrode plates. When the battery cell 10 is charging, active ions are generated on the positive electrode plate. These active ions can penetrate the pores of the separator, move through the electrolyte to the negative electrode plate, and embed themselves in the negative electrode active material. Conversely, when the battery cell 10 discharges, the active ions embedded in the negative electrode active material are released. These released active ions can penetrate the pores of the separator, move through the electrolyte to the positive electrode plate, and embed themselves in the positive electrode active material. The active ions can be lithium ions, sodium ions, etc.

[0083] Electrode terminal 14 is a component electrically connected to electrode assembly 12 and used for outputting or inputting electrical energy. Electrode terminal 14 includes a positive electrode terminal 14a and a negative electrode terminal 14b. Positive electrode terminal 14a is electrically connected to the positive electrode tab 122a of electrode assembly 12. Negative electrode terminal 14b is electrically connected to the negative electrode tab 122b of electrode assembly 12. Electrode terminal 14 can be mounted on housing 11 and stably mounted in a position and state relative to housing 11. In some embodiments, electrode terminal 14 can be mounted on housing 11 by means of flange riveting.

[0084] The adapter 15 is a current collector electrically connected between the tab 122 of the electrode assembly 12 and the corresponding electrode terminal 14. The adapter 15 may also be called an adapter connector, current collector plate, or adapter piece, etc. The adapter 15 has conductive properties and is made of a conductive material. The material of the adapter 15 may include aluminum, aluminum alloy, copper, copper alloy, copper-aluminum alloy, etc. The adapter 15 includes a positive electrode adapter 15a and a negative electrode adapter 15b. The positive electrode tab 122a of the electrode assembly 12 can be electrically connected to the positive electrode terminal 14a through the positive electrode adapter 15a, and the negative electrode tab 122b of the electrode assembly 12 can be electrically connected to the negative electrode terminal 14b through the negative electrode adapter 15b to form a current loop. In some embodiments, the adapter 15 can be connected to the tab 122 of the electrode assembly 12 by welding, abutment, or other methods. The adapter 15 can be connected to the electrode terminal 14 by welding, abutment, or other methods. The shape of the adapter 15 can be varied, such as square, round, irregular shape, etc.

[0085] The insulating component 13 is a component with insulating properties. The insulating component 13 is disposed within the housing 11, particularly between the electrode assembly 12 and the wall portion of the housing 11 having electrode terminals 14 (e.g., end cap 112). Based on the electrical connection between the tabs 122 of the electrode assembly 12 and the corresponding electrode terminals 14, the insulating component 13 can be used to insulate and isolate the electrode assembly 12 and the wall portion of the housing 11 having electrode terminals 14, thereby reducing the risk of short circuits, current leakage, etc. Furthermore, the insulating component 13 can also be fixed to the wall portion of the housing 11 having electrode terminals 14 and abut against the electrode assembly 12 to fill the gap between the electrode assembly 12 and the wall portion of the housing 11, thus tightly fixing the electrode assembly 12. This prevents the electrode assembly 12 from moving or shaking relative to the battery cell 10 during use, helps maintain the structural integrity of the battery cell 10, and reduces the risk of the electrode assembly 12 loosening or deforming.

[0086] A pressure relief mechanism 16 is disposed on the housing 11. The pressure relief mechanism 16 can be used to release internal pressure when the internal pressure (or temperature) of the battery cell 10 reaches a threshold. In some cases, the pressure relief mechanism 16 may also be referred to as an explosion-proof valve. In some embodiments, the pressure relief mechanism 16 may be integrally formed with the wall portion of the housing 11 for which the pressure relief mechanism 16 is disposed (e.g., end cap 112, etc.) (i.e., a one-piece structure), for example, the pressure relief mechanism 16 may be a groove provided on the corresponding wall portion of the housing 11. In other embodiments, the pressure relief mechanism 16 may be separately formed and separately connected with the corresponding wall portion of the housing 11 (i.e., a separate structure).

[0087] Referring to Figure 4, some embodiments of this application provide a battery device 1. The battery device 1 includes a plurality of battery cells 100, and each battery cell 100 includes a plurality of battery cells 10. The plurality of battery cells 100 includes a first battery cell 100a and a second battery cell 100b arranged adjacent to each other along the gravity direction z. The plurality of battery cells 10 of the first battery cell 100a are arranged sequentially along a first direction x, and the plurality of battery cells 10 of the second battery cell 100b are arranged sequentially along a second direction y. The first direction x and the second direction y are perpendicular.

[0088] It should be noted that the battery unit 100 is an energy storage unit capable of converting chemical energy into electrical energy. Each battery unit 100 includes multiple battery cells 10 arranged side by side, that is, multiple battery cells 10 arranged side by side in the same layer and along the same direction together form a battery unit 100. In the battery device 1, there are multiple battery units 100, which are stacked along the direction of gravity z. The battery units 100 arranged in the same layer can be one or multiple, that is, one battery unit 100 may occupy a single layer, or multiple battery units 100 may be in the same layer. In the preset installation state of battery device 1, the gravity direction z basically corresponds to the direction of gravity of battery device 1, that is, it is roughly parallel to the vertical downward direction. Of course, due to installation accuracy and other reasons, the actual installation state of battery device 1 may deviate from the preset installation state. Therefore, in the actual installation state of battery device 1, the gravity direction z may be set at a small angle to the direction of gravity of battery device 1. Thus, the gravity direction z can be broadly understood as "the direction roughly parallel to the actual direction of gravity of battery device 1", and can be defined as "the direction at an angle of 0° to 10° to the actual direction of gravity of battery device 1".

[0089] It should also be noted that among the multiple battery units 100 stacked along the gravitational direction z, at least one group of two adjacent battery units 100 stacked along the gravitational direction z adopts a design of a first battery unit 100a and a second battery unit 100b. Specifically, the multiple battery cells 10 of the first battery unit 100a are arranged side-by-side sequentially along a first direction x, meaning the thickness direction b of the battery cells 10 of the first battery unit 100a corresponds to the first direction x, which is perpendicular to the gravitational direction z. Similarly, the multiple battery cells 10 of the second battery unit 100b are arranged side-by-side sequentially along a second direction y, meaning the thickness direction b of the battery cells 10 of the second battery unit 100b corresponds to the second direction y, which is perpendicular to both the first direction x and the gravitational direction z. Based on this, between the first battery unit 100a and the second battery unit 100b, which are stacked adjacently along the direction of gravity z, the arrangement direction of the multiple battery cells 10 of the second battery unit 100b will be perpendicular to the arrangement direction of the multiple battery cells 10 of the first battery unit 100a. This results in a crisscrossing arrangement of battery cells 10 between the second battery unit 100b and the first battery unit 100a, and in the second battery unit 100b and the first battery unit 100a, there are connection points and support points in a matrix-like distribution between them.

[0090] In summary, the battery device 1 provided in this application embodiment can be designed by having at least one set of two battery units 100 stacked adjacently along the gravity direction z, using a first battery unit 100a and a second battery unit 100b. The battery cells 10 of the first battery unit 100a are arranged sequentially along a first direction x, and the battery cells 10 of the second battery unit 100b are arranged sequentially along a second direction y. This arrangement of the battery cells 10 of the second battery unit 100b is perpendicular to the arrangement of the battery cells 10 of the first battery unit 100a, resulting in a crisscrossing arrangement of battery cells 10 between the second battery unit 100b and the first battery unit 100a. This arrangement creates matrix-like connection points and support points between the second battery unit 100b and the first battery unit 100a. Based on this, in the gravity direction z, one of the first battery unit 100a and the second battery unit 100b can reliably support the other. In the first direction x and the second direction y, the first battery unit 100a and the second battery unit 100b have numerous connection points and support points distributed in a matrix-like manner, and numerous crisscrossing stress dispersion paths. Therefore, the first battery unit 100a and the second battery unit 100b can jointly form a complex and stable support structure, effectively dispersing and resisting stress. This improves the overall structural strength, stiffness, reliability, and stability of the first battery unit 100a and the second battery unit 100b, especially improving the overall stiffness of the first battery unit 1 in the first direction x. This, in turn, improves the overall structural strength, stiffness, reliability, and stability of the battery device 1, particularly enhancing the overall stiffness of the battery device 1 in the first direction x. Furthermore, since the overall rigidity of the first battery unit 100a and the second battery unit 100b is improved, the reinforcement members for enhancing rigidity added to the periphery of the first battery unit 100a and the second battery unit 100b can be omitted, thereby reducing the number of reinforcement members for enhancing rigidity and the space occupied, which is beneficial to improving the space utilization and energy density of the battery device 1.

[0091] Please refer to Figure 4. In some embodiments of this application, multiple second battery cells 100b are arranged in the same layer and spaced apart along the first direction x.

[0092] It should be noted that there are multiple second battery units 100b on the same layer. These multiple second battery units 100b arranged on the same layer can be spaced apart along the first direction x, allowing them to provide more connection points and support points in the first direction x, thus facilitating the battery device 1 with a larger size in the first direction x. For example, as shown in Figure 4, in a specific example, there are two second battery units 100b on the same layer. These two second battery units 100b arranged on the same layer are spaced apart along the first direction x. These two second battery units 100b can collectively provide more connection points and support points for a single first battery unit 100a, thereby enhancing the rigidity and stability of the entire battery device 1 in the first direction x.

[0093] By adopting the above scheme, and arranging multiple second battery units 100b on the same layer, with these units spaced apart along the first direction x, the multiple second battery units 100b on the same layer can provide more connection points and support points in the first direction x, effectively distributing and bearing the stress in the first direction x. Based on this, the multiple second battery units 100b arranged on the same layer can collectively provide reliable and stable support for adjacent first battery units 100a, thereby enhancing the rigidity and structural stability of the entire battery device 1 in the first direction x. This embodiment is particularly suitable for battery devices 1 with a large dimension in the first direction x.

[0094] Of course, in other embodiments, only one second battery unit 100b may be provided on the same layer, that is, one second battery unit 100b occupies a single layer. This situation is more suitable for battery devices 1 with smaller dimensions in the first direction x.

[0095] Please refer to Figure 4. In some embodiments of this application, at least a portion of the first battery cell 100a and at least a portion of the second battery cell 100b are alternately arranged along the direction of gravity z.

[0096] It should be noted that in the battery device 1, at least a portion of the battery cells 100 serve as first battery cells 100a, and at least a portion of the battery cells 100 serve as second battery cells 100b. The at least portion of the first battery cells 100a and at least a portion of the second battery cells 100b are alternately arranged along the gravitational direction z. That is, at least a portion of the battery cells 100 are arranged along the gravitational direction z in either the order of "first battery cell 100a, second battery cell 100b, first battery cell 100a…" or "second battery cell 100b, first battery cell 100a, second battery cell 100b…". For example, as shown in Figure 4, in a specific example, along the gravitational direction z, the second battery cell 100b, the first battery cell 100a, and the second battery cell 100b are arranged alternately.

[0097] By adopting the above scheme, a multi-layered, crisscrossing support network can be formed inside the entire battery device 1 through the alternating arrangement of the first battery unit 100a and the second battery unit 100b. This network structure effectively resists forces and torques from all directions, thereby significantly enhancing the overall structural strength, stiffness, structural reliability, structural stability, and durability of the battery device 1. Furthermore, it greatly reduces the need for reinforcing members to enhance stiffness, significantly reducing the number of reinforcing members and the space occupied, thus contributing to improved space utilization and energy density of the battery device 1. Moreover, based on the arrangement of this embodiment, the arrangement of each battery unit 100 is regular, facilitating automated assembly and testing, thereby improving the production efficiency of the battery device 1 and reducing its cost.

[0098] Of course, in other embodiments, based on the fact that multiple battery cells 100 include first battery cells 100a and second battery cells 100b stacked adjacently along the gravity direction z, it is permissible for some battery cells 100 not to adopt the design of first battery cells 100a and second battery cells 100b.

[0099] Please refer to Figures 4 and 5. In some embodiments of this application, the battery cell 10 includes a housing 11 and electrode terminals 14. In at least one battery cell 10, the electrode terminals 14 are disposed on one side of the housing 11 along the height direction c of the battery cell 10. The housing 11 includes a first wall 113, which includes a main body portion 1131 and a recess 1132. The recess 1132 is recessed relative to the main body portion 1131 toward the interior of the housing 11, and the electrode terminals 14 are disposed in the recess 1132.

[0100] It should be noted that the battery cell 10 has a height direction, a length direction, and a thickness direction. The thickness direction b of the battery cell 10 basically corresponds to the arrangement direction of the battery cells 10, and the thickness direction b of the battery cell 10 is basically perpendicular to the largest surface of the battery cell 10. The length direction a of the battery cell 10 is perpendicular to the thickness direction b of the battery cell 10, and the plane jointly determined by the length direction a and the thickness direction b of the battery cell 10 is approximately parallel to the horizontal plane. The height direction c of the battery cell 10 is perpendicular to the length direction a and the thickness direction b of the battery cell 10, that is, the height direction c of the battery cell 10 is perpendicular to the plane jointly determined by the length direction a and the thickness direction b of the battery cell 10.

[0101] It should also be noted that the housing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. The electrode terminal 14 is a component used for outputting or inputting electrical energy. The electrode terminal 14 can be mounted on the housing 11 and is stably mounted in a position and state relative to the housing 11. Some related descriptions of the housing 11 and the electrode terminal 14 can be found in the preceding text and will not be repeated here.

[0102] In at least one battery cell 10 of the battery device 1, an electrode terminal 14 is disposed on one side of the housing 11 along the height direction c of the battery cell 10. One wall of the housing 11 along the height direction c of the battery cell 10 is a first wall 113, which is the wall used to mount the electrode terminal 14. A portion of the first wall 113 is a main body portion 1131, and another portion is a recess 1132. The recess 1132 can be located in the middle region of the main body portion 1131 or in the end region of the main body portion 1131. The recess 1132 is recessed towards the interior of the housing 11 relative to the main body portion 1131. The electrode terminal 14 can be mounted in the recess 1132 to reduce the size of the electrode terminal 14 protruding from the main body portion 1131. As shown in FIG. 5, in some embodiments, the electrode terminal 14 includes a positive electrode terminal 14a and a negative electrode terminal 14b, which are mounted in the same recess 1132. In other embodiments, the electrode terminal 14 includes a positive electrode terminal 14a and a negative electrode terminal 14b, which are respectively mounted in two recesses 1132.

[0103] By adopting the above-described scheme, at least one battery cell 10 can have its electrode terminals 14 disposed on one side of the housing 11 along the height direction c of the battery cell 10, and the recess 1132 provided on the housing 11 providing mounting space for the electrode terminals 14, so that part or all of the electrode terminals 14 are accommodated in the recess 1132, thereby reducing the size of the electrode terminals 14 protruding from the main body 1131. Based on this, in the height direction c of the battery cell 10, the protruding portion of the battery cell 10 can be reduced, the additional space required for the electrode terminals 14 in the gravity direction z can be reduced, and the overall size and space occupied can be compressed, thereby improving the space utilization and energy density of the battery device 1. Furthermore, since part or all of the electrode terminals 14 are accommodated in the recess 1132, the risk of damage to the electrode terminals 14 due to external impact or compression can be reduced, thereby improving the reliability and service life of the battery cell 10. Furthermore, the recess 1132 can also provide a clear positioning for the installation of the electrode terminal 14, making the installation position and installation state of the electrode terminal 14 more stable and reliable, thereby optimizing the assembly process of the battery cell 10 and improving the assembly convenience, assembly efficiency and production efficiency of the battery cell 10.

[0104] Please refer to Figures 4 and 5. In some embodiments of this application, the electrode terminal 14 does not protrude from the main body portion 1131.

[0105] It should be noted that in the previous embodiment, that is, when the electrode terminal 14 is provided in the recess 1132, the electrode terminal 14 can be completely accommodated in the recess 1132 and does not protrude from the main body 1131.

[0106] By adopting the above solution, based on the previous embodiment, at least one battery cell 10 can have its electrode terminal 14 completely accommodated within the recess 1132 without protruding from the main body 1131. Based on this, in the height direction c of the battery cell 10, the battery cell 10 can directly receive a flat, high-strength abutment support surface via the main body 1131 of the first wall 113 of the outer casing 11, reliably abutting and supporting other components (e.g., other battery cells, support members 300, etc.), and reliably withstand stress and torque. This improves the strength, stiffness, reliability, and durability of the battery cell 10, thus enhancing the overall strength, stiffness, reliability, and durability of the battery device 1. Furthermore, the space occupied by the battery cell 10 is essentially equal to the space occupied by the outer casing 11, thereby reducing the size and space occupied by the battery cell 10. This facilitates the close arrangement of the battery cell 10 with other battery cells, improving the space utilization and energy density of the battery device 1. Furthermore, since the electrode terminals 14 are all housed in the recess 1132, the risk of damage to the electrode terminals 14 due to external impact or compression can be greatly reduced, thereby improving the reliability and service life of the battery cell 10.

[0107] Of course, in other embodiments, when the electrode terminal 14 is disposed in the recess 1132, the electrode terminal 14 may be partially accommodated in the recess 1132 and partially protrude from the main body 1131. For the portion of the electrode terminal 14 protruding from the main body 1131, components (such as support members 300, etc.) stacked adjacent to the main body 1131 in the direction of gravity may provide accommodating space for the portion of the electrode terminal 14 protruding from the main body 1131 as needed, so as to reduce the risk of the electrode terminal 14 being damaged due to directly performing a supporting function.

[0108] Please refer to Figures 4 and 6. In some embodiments of this application, the battery cell 10 includes an electrode terminal 14; the electrode terminal 14 of at least one battery cell 10 is disposed on the end side of the battery cell 10 along its own length direction.

[0109] It should be noted that electrode terminal 14 is a component used for outputting or inputting electrical energy. Some relevant descriptions of electrode terminal 14 can be found in the previous text and will not be repeated here.

[0110] It should also be noted that in at least one battery cell 10 of the battery device 1, the electrode terminal 14 may be provided on the end side of the battery cell 10 along the length direction a of the battery cell 10, while avoiding the wall portion of the outer casing 11 along the height direction c of the battery cell 10. As shown in FIG6, in some embodiments, one electrode terminal 14 is provided at each opposite end of the battery cell 10 along the length direction a of the battery cell 10. In other embodiments, two electrode terminals 14 are uniformly provided on one end side of the battery cell 10 along the length direction a of the battery cell 10.

[0111] By adopting the above-described scheme, at least one battery cell 10 can have its electrode terminal 14 disposed on the end side of the battery cell 10 along the length direction a, so that the electrode terminal 14 is disposed away from the wall portion of the casing 11 along the height direction c of the battery cell 10. Based on this, the battery cell 10 can directly provide a flat, high-strength abutment support surface via the wall portion of the casing 11 along the height direction c of the battery cell 10, reliably abutting and supporting other components (e.g., other battery cells), and reliably withstanding stress and torque. This improves the strength, stiffness, reliability, and durability of the battery cell 10, and is beneficial to improving the strength, stiffness, reliability, and durability of the entire battery device 1. Furthermore, since the electrode terminal 14 is disposed on the end side of the battery cell 10 along the length direction a, the casing 11 of the battery cell 10 can omit the recess 1132 to accommodate the electrode terminal 14, thereby simplifying the design of the casing 11 of the battery cell 10 and reducing the processing cost of the battery cell 10.

[0112] It should be noted that in the battery device 1, all battery cells 10 may adopt the design of "electrode terminals 14 being located on one side of the housing 11 along the height direction c of the battery cell 10", or all battery cells 10 may adopt the design of "electrode terminals 14 being located on the end side of the battery cell 10 along its own length direction", or some battery cells 10 may adopt the design of "electrode terminals 14 being located on one side of the housing 11 along the height direction c of the battery cell 10" and some battery cells 10 may adopt the design of "electrode terminals 14 being located on the end side of the battery cell 10 along its own length direction". That is, the embodiment of "at least one battery cell 10 having an electrode terminal 14 disposed on the end side of the battery cell 10 along its own length direction" and the embodiment of "at least one battery cell 10 having an electrode terminal 14 disposed on one side of the housing 11 along the height direction c of the battery cell 10, the housing 11 including a first wall 113, the first wall 113 including a main body portion 1131 and a recess 1132, the recess 1132 being recessed toward the interior of the housing 11 relative to the main body portion 1131, and the electrode terminal 14 being disposed in the recess 1132" can be selected or can be configured in a compatible manner.

[0113] Please refer to Figures 4, 5, and 6. In some embodiments of this application, the battery cell 10 includes a pressure relief mechanism 16; the pressure relief mechanism 16 of at least one battery cell 10 is disposed on the end side of the battery cell 10 along its own length direction.

[0114] It should be noted that the battery cell 10 has a pressure relief mechanism 16, which can be used to release internal pressure when the internal pressure (or temperature) of the battery cell 10 reaches a threshold. Some relevant descriptions of the pressure relief mechanism 16 can be found in the previous text and will not be repeated here.

[0115] In at least one battery cell 10 of the battery device 1, the pressure relief mechanism 16 may be provided at the end side of the battery cell 10 along the length direction a of the battery cell 10, so that the exhaust space is mainly preset at the end side of the battery cell 10 along the length direction a of the battery cell 10.

[0116] By adopting the above scheme, at least one battery cell 10 can have a pressure relief mechanism 16 disposed on the end side of the battery cell 10 along the length direction a of the battery cell 10. This means that the battery cell 10 mainly needs to arrange a venting space on the end side of the length direction a of the battery cell 10, without arranging a venting space on the side side of the height direction c of the battery cell 10, or on the side side of the thickness direction b of the battery cell 10. Based on this, it is convenient for the battery cell 10 to be closely arranged with adjacent battery cells 10 along its own thickness direction, and it is also convenient for the battery cell 10 to directly abut and support other battery cells along its own height direction. This is beneficial to improving the strength, rigidity, reliability and durability of the entire battery device 1, and is beneficial to improving the space utilization and energy density of the battery device 1.

[0117] Please refer to Figure 4. In some embodiments of this application, the battery device 1 includes a support member 300, which is stacked between two adjacent battery cells 100 arranged along the direction of gravity z.

[0118] It should be noted that the support member 300 is a component with a certain supporting strength. In the battery device 1, at least one support member 300 is provided. The support member 300 can be stacked between two adjacent battery cells 100 arranged along the gravity direction z, for example, it can be stacked between a first battery cell 100a and a second battery cell 100b arranged adjacent along the gravity direction z.

[0119] By adopting the above scheme, by stacking support members 300 between two adjacent battery cells 100 along the gravity direction z, the two adjacent stacked battery cells 100 can be provided with support and protection, the downward displacement and deformation of the battery cell 100 located on the upper side can be reduced, and stress can be absorbed and dispersed, thereby improving the strength, stiffness, reliability, stability and durability of the entire battery device 1, and especially improving the overall stiffness of the battery device 1 in the first direction x.

[0120] Of course, in other embodiments, the support member 300 may be omitted between two adjacent battery cells 100 along the direction of gravity z as needed.

[0121] Please refer to Figure 4. In some embodiments of this application, the support 300 is a thermal management component.

[0122] It should be noted that the thermal management component is used to exchange heat with components such as the battery cell 10 to regulate the temperature of the battery cell 10. When the battery device 1 includes a support member 300, the support member 300 can be a thermal management component; that is, the support member 300 has both the function of "supporting between two adjacent battery cells 100 along the gravitational direction z" and the function of "exchanging heat with the battery cells 10 of the two adjacent battery cells 100 along the gravitational direction z". The thermal management component can be a liquid cooling plate.

[0123] The thermal management component can adopt various structures. In some embodiments, the thermal management component includes a first plate and a second plate, which overlap each other. A flow channel is provided between the first and second plates (e.g., on the side of the first plate facing the second plate and the side of the second plate facing the first plate). The flow channel can extend linearly or bend, and can be used to flow a heat exchange fluid. The heat exchange fluid can be used to regulate the temperature of the battery cell 10, and can be a liquid or a gas. In some embodiments, the heat exchange fluid can be circulated to achieve better temperature regulation. The heat exchange fluid can be, but is not limited to, water, a mixture of water and ethylene glycol, or air. The first plate includes a thermally conductive material, has thermal conductivity, and can perform heat exchange and heat conduction functions. The first plate can be, but is not limited to, a metal component. The second plate includes a thermally conductive material, has thermal conductivity, and can perform heat exchange and heat conduction functions. The second plate can be, but is not limited to, a metal component. The heat exchange effect and efficiency of thermal management components can be optimized by designing the width and extension path of the flow channel.

[0124] By adopting the above-described scheme, when the battery device 1 includes a support member 300, the support member 300 can be made into a thermal management component, thus enabling it to both support two adjacent battery cells 100 along the gravitational direction z and exchange heat with the individual battery cells 10 of the two adjacent battery cells 100 along the gravitational direction z. Based on this, the support member 300 can provide structural support while simultaneously exchanging heat with the individual battery cells 10 of adjacent battery cells 100, maintaining the temperature of the battery cells 100 within a suitable range. This improves the strength, rigidity, reliability, stability, and durability of the entire battery device 1, while also optimizing its thermal management performance and efficiency, thereby enhancing its reliability and lifespan. Furthermore, integrating the support member 300 and the thermal management component into one unit reduces the number of components in the battery device 1, improving its space utilization and energy density.

[0125] Of course, in other embodiments, the support 300 may not be a thermal management component, that is, the support 300 may only have the function of "supporting between two adjacent battery cells 100 along the direction of gravity z".

[0126] Please refer to Figures 4 and 5. In some embodiments of this application, the battery cell 10 includes a housing 11 and electrode terminals 14. In at least one battery cell 10, the electrode terminals 14 are disposed on one side of the housing 11 along the height direction c of the battery cell 10. The housing 11 includes a first wall 113, which includes a main body portion 1131 and a recess 1132. The recess 1132 is recessed toward the interior of the housing 11 relative to the main body portion 1131. The electrode terminals 14 are disposed in the recess 1132, and the main body portion 1131 abuts against a corresponding support member 300.

[0127] It should be noted that, in the embodiment where “at least one battery cell 10 has an electrode terminal 14 disposed on one side of the housing 11 along the height direction c of the battery cell 10, the housing 11 includes a first wall 113, the first wall 113 includes a main body portion 1131 and a recess 1132, the recess 1132 is recessed toward the interior of the housing 11 relative to the main body portion 1131, and the electrode terminal 14 is disposed in the recess 1132”, in combination with the embodiment where “the battery device 1 includes a support member 300, and the support member 300 is stacked between two adjacent battery cells 100 disposed along the gravity direction z”, the first wall 113 can abut against the corresponding support member 300 (i.e., the support member 300 stacked adjacent to the first wall 113 along the gravity direction z) via the main body portion 1131, so that the stress mainly acts between the main body portion 1131 and the corresponding support member 300. As shown in Figures 4 and 5, in some cases, the electrode terminal 14 can be completely accommodated within the recess 1132 without protruding from the main body 1131. In other cases, the electrode terminal 14 can be partially accommodated within the recess 1132 and partially protruding from the main body 1131. The portion of the electrode terminal 14 protruding from the main body 1131 can be embedded in the corresponding support member 300 so that the corresponding support member 300 abuts against the surface of the main body 1131.

[0128] By adopting the above scheme, the battery cell 10 with electrode terminals 14 disposed in the recess 1132 of the first wall 113 can be provided with a flat abutment support surface with better bearing strength through the main body 1131 to abut against the corresponding support member 300, thereby reliably bearing stress and torque, effectively dispersing stress, thereby improving the bearing strength, stiffness, reliability and durability of the battery cell 10, which is beneficial to improving the strength, stiffness, reliability and durability of the entire battery device 1.

[0129] Please refer to Figures 4 and 5. In some embodiments of this application, two adjacent battery cells 10 of the same battery cell 100 are bonded together.

[0130] It should be noted that each battery cell 100 includes multiple battery cells 10 arranged side-by-side along the same direction. In each battery cell 100, two adjacent battery cells 10 arranged side-by-side along the thickness direction b of the battery cells 10 are bonded to each other, so that the multiple battery cells 10 arranged sequentially are bonded to form an integral structure. For example, the multiple battery cells 10 of the first battery cell 100a are arranged side-by-side along the first direction x. In this case, the thickness direction b of the battery cells 10 of the first battery cell 100a corresponds to the first direction x, and the multiple battery cells 10 of the first battery cell 100a are bonded to form an integral structure. As another example, the multiple battery cells 10 of the second battery cell 100b are arranged side-by-side along the second direction y. In this case, the thickness direction b of the battery cells 10 of the second battery cell 100b corresponds to the second direction y, and the multiple battery cells 10 of the second battery cell 100b are bonded to form an integral structure.

[0131] By adopting the above scheme, by bonding adjacent battery cells 10 of the same battery unit 100 together, a strong physical connection can be formed between two adjacent battery cells 10 of the same battery unit 100. Even if some battery cells 10 of the battery unit 100 are subjected to weak bottom support (for example, some battery cells 10 of the battery unit 100 are subjected to weak bottom support due to the concave portion 1132 of the corresponding bottom battery cell 10), these battery cells 10 of the battery unit 100 can still be reliably supported by the other battery cells 10 of the battery unit 100 due to bonding, thereby reducing local sinking and local deformation of the battery unit 100. This improves the overall structural strength, structural stability, structural reliability, and stiffness of the battery unit 100, and helps the battery unit 100 resist external impacts and vibrations. Furthermore, by bonding adjacent battery cells 10, the compactness of the battery unit 100 arrangement can be improved, reducing space waste, which is conducive to improving the overall space utilization and energy density of the battery device 1.

[0132] Of course, in other embodiments, adjacent battery cells 10 of the same battery cell 100 may not be bonded to each other. For example, each battery cell 10 of the battery cell 100 may be uniformly supported by the support member 300 to form a regular structure, etc.

[0133] Please refer to Figures 3, 4, and 5. In some embodiments of this application, the battery cell 10 includes a housing 11 and an electrode assembly 12 disposed within the housing 11. Along the thickness direction b of the battery cell 10, the electrode assembly 12 occupies 90% to 100% of the area within the housing 11.

[0134] It should be noted that the outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. The electrode assembly 12 is a component in the battery cell 10 where electrochemical reactions occur. The electrode assembly 12 is located inside the outer casing 11. Furthermore, some related descriptions of the outer casing 11 and the electrode assembly 12 can be found in the preceding text and will not be repeated here.

[0135] It should also be noted that "the group margin occupied by the electrode assembly 12 within the casing 11 along the thickness direction b of the battery cell 10" refers to the ratio of "the dimension of the electrode assembly 12 in the thickness direction b of the battery cell 10" to "the dimension of the internal space of the casing 11 in the thickness direction b of the battery cell 10". For example, in some cases, the battery cell 10 can be scanned using a scanning electron microscope (SEM) to obtain a high-resolution image of the internal structure of the battery cell 10. Based on the image analysis data, the ratio of "the dimension of the electrode assembly 12 in the thickness direction b of the battery cell 10" to "the dimension of the internal space of the casing 11 in the thickness direction b of the battery cell 10" can be measured, thereby measuring "the group margin occupied by the electrode assembly 12 within the casing 11 along the thickness direction b of the battery cell 10".

[0136] Along the thickness direction b of the battery cell 10, the electrode assembly 12 occupies a margin of 90% to 100% within the housing 11, for example, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc.

[0137] By adopting the above scheme, the electrode assembly 12 can occupy a larger margin within the casing 11 in the thickness direction b of the battery cell 10, resulting in a greater degree of filling of the electrode assembly 12 relative to the internal space of the casing 11. Based on this, the electrode assembly 12 will be more fully and tightly filled within the casing 11 of the battery cell 10 in the thickness direction b, providing more internal support. This increases the solidity of the battery cell 10 in the thickness direction b, enhancing its strength, rigidity, reliability, and durability, thereby improving the overall strength, rigidity, reliability, and durability of the battery device 1. Furthermore, a high filling rate of the electrode assembly 12 means that more active material is encapsulated within the battery cell 10, thereby increasing the energy density of the battery cell 10 and ultimately improving the energy density of the entire battery device 1.

[0138] Please refer to Figures 3 and 4. In some embodiments of this application, the battery cell 10 includes a housing 11, electrode terminals 14, and an electrode assembly 12 disposed within the housing 11. As shown in Figure 5, the electrode terminals 14 are disposed on one side of the housing 11 along the height direction c of the battery cell 10, and along the length direction a of the battery cell 10, the electrode assembly 12 occupies a group margin of 90% to 100% within the housing 11; or, as shown in Figure 6, the electrode terminals 14 are disposed on the end side of the housing 11 along the length direction a of the battery cell 10, and along the length direction a of the battery cell 10, the electrode assembly 12 occupies a group margin of 80% to 100% within the housing 11.

[0139] It should be noted that the outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. The electrode terminals 14 are components used for outputting or inputting electrical energy. The electrode terminals 14 can be installed in the outer casing 11 and are stably positioned and in a fixed state relative to the outer casing 11. The electrode assembly 12 is a component in the battery cell 10 where the electrochemical reaction occurs. The electrode assembly 12 is located inside the outer casing 11. Furthermore, some related descriptions of the outer casing 11, electrode terminals 14, and electrode assembly 12 can be found above and will not be repeated here.

[0140] It should also be noted that "the group margin occupied by the electrode assembly 12 within the casing 11 along the length direction a of the battery cell 10" refers to the ratio of "the dimension of the electrode assembly 12 along the length direction a of the battery cell 10" to "the dimension of the internal space of the casing 11 along the length direction a of the battery cell 10". For example, in some cases, the battery cell 10 can be scanned using a scanning electron microscope (SEM) to obtain a high-resolution image of the internal structure of the battery cell 10. Based on the image analysis data, the ratio of "the dimension of the electrode assembly 12 along the length direction a of the battery cell 10" to "the dimension of the internal space of the casing 11 along the length direction a of the battery cell 10" can be measured, thereby measuring "the group margin occupied by the electrode assembly 12 within the casing 11 along the length direction a of the battery cell 10".

[0141] As shown in Figure 5, in some cases, the electrode terminal 14 is located on one side of the housing 11 along the height direction c of the battery cell 10. In this case, the electrode terminal 14 does not occupy the internal space of the housing 11 in the length direction a of the battery cell 10. Therefore, in the length direction a of the battery cell 10, the occupancy margin of the electrode assembly 12 in the housing 11 can reach 90% to 100%, for example, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc.

[0142] As shown in Figure 6, in some cases, the electrode terminal 14 is located on the end side of the housing 11 along the length direction a of the battery cell 10. In this case, the electrode terminal 14 may occupy part of the internal space of the housing 11 along the length direction a of the battery cell 10. Therefore, the percentage of the electrode assembly 12 within the housing 11 along the length direction a of the battery cell 10 can be 80% to 100%, for example, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc.

[0143] By adopting the above scheme, whether the electrode terminal 14 is located on one side of the housing 11 along the height direction c of the battery cell 10 or on the end side of the housing 11 along the length direction a of the battery cell 10, the electrode assembly 12 can occupy a larger margin within the housing 11 along the length direction a of the battery cell 10, resulting in a greater degree of filling of the electrode assembly 12 relative to the internal space of the housing 11. Based on this, the electrode assembly 12 will fill the housing 11 of the battery cell 10 more fully and tightly along the length direction a, providing more internal support. This increases the solidity of the battery cell 10 along the length direction a, enhancing its strength, rigidity, reliability, and durability, thus improving the overall strength, rigidity, reliability, and durability of the battery device 1. Furthermore, a high filling rate of the electrode assembly 12 means that more active material is encapsulated within the battery cell 10, thereby increasing the energy density of the battery cell 10 and ultimately improving the overall energy density of the battery device 1.

[0144] Please refer to Figures 3 and 4. In some embodiments of this application, the battery cell 10 includes a housing 11, electrode terminals 14, and an electrode assembly 12 disposed within the housing 11. As shown in Figure 5, the electrode terminals 14 are disposed on one side of the housing 11 along the height direction c of the battery cell 10, and the electrode assembly 12 occupies 80% to 100% of the housing 11 along the height direction c of the battery cell 10; or, as shown in Figure 6, the electrode terminals 14 are disposed on the end side of the housing 11 along the length direction a of the battery cell 10, and the electrode assembly 12 occupies 90% to 100% of the housing 11 along the height direction c of the battery cell 10.

[0145] It should be noted that the outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. The electrode terminals 14 are components used for outputting or inputting electrical energy. The electrode terminals 14 can be installed in the outer casing 11 and are stably positioned and in a fixed state relative to the outer casing 11. The electrode assembly 12 is a component in the battery cell 10 where the electrochemical reaction occurs. The electrode assembly 12 is located inside the outer casing 11. Furthermore, some related descriptions of the outer casing 11, electrode terminals 14, and electrode assembly 12 can be found above and will not be repeated here.

[0146] It should also be noted that "the group margin occupied by the electrode assembly 12 within the housing 11 along the height direction c of the battery cell 10" refers to the ratio of "the dimension of the electrode assembly 12 in the height direction c of the battery cell 10" to "the dimension of the internal space of the housing 11 in the height direction c of the battery cell 10". For example, in some cases, the battery cell 10 can be scanned using a scanning electron microscope (SEM) to obtain a high-resolution image of the internal structure of the battery cell 10. Based on the image analysis data, the ratio of "the dimension of the electrode assembly 12 in the height direction c of the battery cell 10" to "the dimension of the internal space of the housing 11 in the height direction c of the battery cell 10" can be measured, thereby allowing the measurement of "the group margin occupied by the electrode assembly 12 within the housing 11 along the height direction c of the battery cell 10".

[0147] As shown in Figure 5, in some cases, the electrode terminal 14 is located on one side of the housing 11 along the height direction c of the battery cell 10. In this case, the electrode terminal 14 may occupy part of the internal space of the housing 11 along the height direction c of the battery cell 10. Therefore, the percentage of the electrode assembly 12 within the housing 11 along the height direction c of the battery cell 10 can be 80% to 100%, for example, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc.

[0148] As shown in Figure 6, in some cases, the electrode terminal 14 is located on the end side of the housing 11 along the length direction a of the battery cell 10. In this case, the electrode terminal 14 does not occupy the internal space of the housing 11 in the height direction c of the battery cell 10. Therefore, in the height direction c of the battery cell 10, the occupancy margin of the electrode assembly 12 in the housing 11 can reach 90% to 100%, for example, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%, etc.

[0149] By adopting the above scheme, whether the electrode terminal 14 is located on one side of the casing 11 along the height direction c of the battery cell 10, or on the end side of the casing 11 along the length direction a of the battery cell 10, the electrode assembly 12 can occupy a larger margin within the casing 11 along the height direction c of the battery cell 10, resulting in a greater degree of filling of the electrode assembly 12 relative to the internal space of the casing 11. Based on this, the electrode assembly 12 will fill the casing 11 of the battery cell 10 more fully and tightly along the height direction c, providing more internal support. This increases the solidity of the battery cell 10 along the height direction c, enhancing its strength, rigidity, reliability, and durability, thus improving the overall strength, rigidity, reliability, and durability of the battery device 1. Furthermore, a high filling rate of the electrode assembly 12 means that more active material is encapsulated within the battery cell 10, thereby increasing the energy density of the battery cell 10 and ultimately improving the overall energy density of the battery device 1.

[0150] Please refer to Figures 4 and 5. In some embodiments of this application, the battery cell 10 includes a housing 11, which includes at least one of steel, aluminum, and titanium materials.

[0151] It should be noted that the outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. Furthermore, some related descriptions of the outer casing 11 can be found above and will not be repeated here.

[0152] The outer shell 11 includes at least one of steel, aluminum, and titanium materials, meaning that the outer shell 11 can be made of at least one of steel, aluminum, and titanium materials.

[0153] By adopting the above-described scheme, the material of the outer casing 11 of the battery cell 10 can be optimized, resulting in better corrosion resistance, strength, and rigidity. This allows the outer casing 11 to provide robust protection for components such as the electrode assembly 12 and to provide reliable support for other battery cells. Consequently, the strength, rigidity, reliability, and durability of the battery cell 10 are improved, which in turn enhances the overall strength, rigidity, reliability, and durability of the battery device 1. Furthermore, the arrangement in this embodiment facilitates the welding and forming of the outer casing 11, thereby simplifying the processing and forming of the battery cell 10.

[0154] Of course, in other embodiments, the housing 11 may be made of other materials, such as copper, iron, plastic, etc.

[0155] Please refer to Figures 4 and 5. In some embodiments of this application, the battery cell 10 includes a housing 11, and the wall thickness of the housing 11 is 0.1 mm to 0.8 mm.

[0156] It should be noted that the outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. Furthermore, some related descriptions of the outer casing 11 can be found above and will not be repeated here.

[0157] The wall thickness of the outer casing 11 refers to the thickness of the wall portion of the outer casing 11, that is, the distance between the outer surface and the inner surface of the wall portion of the outer casing 11. For example, in some cases, for the finished battery cell 10, the outer casing 11 can be disassembled, and the thickness of different regions of the wall portion of the outer casing 11 can be measured using a high-precision thickness gauge, and the average value can be taken as the wall thickness of the outer casing 11. The wall thickness of the outer casing 11 is 0.1mm to 0.8mm, for example, it can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc.

[0158] By adopting the above-mentioned scheme, the wall thickness of the outer casing 11 can be made moderate. Based on this, on the one hand, the outer casing 11 can have sufficient wall thickness and thus sufficient rigidity, enabling the outer casing 11 of the battery cell 10 to provide robust protection for components such as the electrode assembly 12, and to provide reliable support for other battery cells. This improves the strength, rigidity, reliability, and durability of the battery cell 10, which is beneficial to improving the strength, rigidity, reliability, and durability of the entire battery device 1. On the other hand, the wall thickness of the outer casing 11 is not too large, thus reducing the space occupied by the outer casing 11. This provides more space for the active material inside the battery cell 10, which is beneficial to improving the space utilization and energy density of the battery cell 10, and thus to improving the space utilization and energy density of the entire battery device 1.

[0159] Please refer to Figures 4 and 5. In some embodiments of this application, the battery cell 10 includes a casing 11, and the Vickers hardness of the casing 11 is 10 to 400.

[0160] It should be noted that the outer casing 11 is a component that isolates the internal environment of the battery cell 10 from the external environment. Furthermore, some related descriptions of the outer casing 11 can be found above and will not be repeated here.

[0161] Vickers hardness refers to the hardness of a metal measured by pressing a diamond pyramid indenter with a 136-degree angle between its two faces into the surface of a test sample under a specified load. After holding the indenter for a certain period, the load is removed, the diagonal length of the indentation is measured, the surface area of ​​the indentation is calculated, and finally, the average pressure on the indentation surface area is determined. This value is represented by the symbol HV. For example, in some cases, a Vickers hardness tester can be used to measure the Vickers hardness of a shell 11. Specifically, the cut shell 11 sample is placed under the lens of the Vickers hardness tester, and the test line is zeroed through the eyepiece. The lifting rod is then adjusted to ensure a clear view of the sample surface through the eyepiece. After adjusting the lifting rod, the start button is pressed to begin loading the sample. After loading is complete, the diagonal length of the indentation is measured through the eyepiece, and the measurement result is input into the device. The device automatically displays the Vickers hardness value (i.e., no manual calculation of the indentation surface area, average pressure on the indentation surface area, etc. is required). The displayed Vickers hardness value is the Vickers hardness of the shell 11.

[0162] By adopting the above-mentioned scheme, the Vickers hardness of the outer casing 11 can be moderate. Based on this, on the one hand, the outer casing 11 can have sufficient hardness and rigidity, thereby enabling the outer casing 11 of the battery cell 10 to provide robust protection for components such as the electrode assembly 12, and to provide reliable support for other battery cells. This improves the strength, rigidity, reliability, and durability of the battery cell 10, which is beneficial to improving the strength, rigidity, reliability, and durability of the entire battery device 1. On the other hand, the outer casing 11 can have good plasticity, which facilitates the processing and molding of the outer casing 11, thereby improving the processing and molding convenience of the battery cell 10, which is beneficial to improving the production efficiency of the battery cell 10 and reducing the production cost of the battery cell 10.

[0163] Please refer to Figures 3, 4, and 5. Based on the above embodiments, this application provides a specific example of a battery device 1.

[0164] The battery device 1 includes multiple battery units 100, each battery unit 100 including multiple battery cells 10 arranged side by side. The multiple battery units 100 include first battery units 100a and second battery units 100b alternately arranged along the gravitational direction z. The multiple battery cells 100 of the first battery unit 100a are arranged and bonded sequentially along a first direction x. Multiple second battery units 100b are located on the same layer, and these second battery units 100b are spaced apart along the first direction x. The multiple battery cells 100 of each second battery unit 100b are arranged and bonded sequentially along a second direction y. Based on this, a multi-layered, crisscrossing support network can be formed inside the entire battery device 1, effectively resisting forces and torques from all directions through this network structure. This significantly enhances the overall structural strength, stiffness, structural reliability, structural stability, and durability of the battery device 1. Furthermore, it greatly reduces the need for reinforcing members to enhance stiffness, significantly reducing the number of reinforcing members and the space occupied, thereby contributing to improved space utilization and energy density of the battery device 1. Furthermore, the arrangement of each battery cell 100 is regular, which makes it easy to automate assembly and testing, thereby improving the production efficiency of the battery device 1 and reducing the cost of the battery device 1.

[0165] The battery device 1 also includes a support member 300, which is stacked between two adjacent battery cells 100 arranged along the gravitational direction z. The support member 300 is a thermal management component. Therefore, the support member 300 provides support and protection to the two adjacent stacked battery cells 100, reducing the downward displacement and deformation of the battery cell 100 located on the upper side, absorbing and dispersing stress, thereby improving the strength, stiffness, reliability, stability, and durability of the entire battery device 1, especially improving the overall stiffness of the battery device 1 in the first direction x. Furthermore, while providing structural support, the support member 300 can also exchange heat with the individual battery cells 10 of the adjacent battery cells 100 to maintain the temperature of the battery cells 100 within a suitable range. Thus, while improving the strength, stiffness, reliability, stability, and durability of the entire battery device 1, the support member 300 also optimizes the thermal management performance and efficiency of the battery device 1, thereby improving the reliability and service life of the battery device 1. Furthermore, the integration of the support component 300 and the thermal management component into one unit helps reduce the number of parts in the battery device 1, thereby improving the space utilization and energy density of the battery device 1.

[0166] The battery cell 10 includes a housing 11 and electrode terminals 14. The electrode terminals 14 are disposed on one side of the housing 11 along the height direction c of the battery cell 10. The housing 11 includes a first wall 113, which includes a main body portion 1131 and a recess 1132. The recess 1132 is recessed into the housing 11 relative to the main body portion 1131. The electrode terminals 14 are disposed in the recess 1132 and do not protrude from the main body portion 1131. The main body portion 1131 abuts against a corresponding support member 300. Based on this, the battery cell 10 can directly abut against and support a flat surface with better load-bearing strength through the wall portion of the outer casing 11 along the height direction c of the battery cell 10, especially through the main body portion 1131 of the first wall 113. This surface reliably abuts against and supports the corresponding support member 300 and other battery cells, thus reliably bearing stress and torque, effectively dispersing stress, thereby improving the load-bearing strength, stiffness, reliability, and durability of the battery cell 10, which is beneficial to improving the strength, stiffness, reliability, and durability of the entire battery device 1. Furthermore, the space occupied by the battery cell 10 is basically equal to the space occupied by the outer casing 11, thereby reducing the size and space occupied by the battery cell 10, facilitating the close arrangement of the battery cell 10 with other battery cells, and improving the space utilization and energy density of the battery device 1. Moreover, since all the electrode terminals 14 are accommodated in the recess 1132, the risk of damage to the electrode terminals 14 due to external impact or compression can be greatly reduced, thereby improving the reliability and service life of the battery cell 10.

[0167] The battery cell 10 also includes a pressure relief mechanism 16, which is located at one end of the battery cell 10 along its length. Therefore, the battery cell 10 primarily requires a venting space at its end along the length direction a, without needing a venting space at its side along the height direction c or thickness direction b. This facilitates the close arrangement of the battery cells 10 with adjacent cells along their thickness direction and allows for direct contact and support between the battery cells 10 and other cells along their height direction. This improves the strength, rigidity, reliability, and durability of the entire battery device 1, and also enhances its space utilization and energy density.

[0168] The battery cell 10 also includes an electrode assembly 12 disposed within the housing 11. Along the thickness direction b of the battery cell 10, the electrode assembly 12 occupies 90% to 100% of the space within the housing 11. Along the length direction a of the battery cell 10, the electrode assembly 12 occupies 90% to 100% of the space within the housing 11. Along the height direction c of the battery cell 10, the electrode assembly 12 occupies 80% to 100% of the space within the housing 11. Therefore, the electrode assembly 12 occupies a large space within the housing 11 in the thickness direction b, the length direction a, and the height direction c of the battery cell 10, meaning that the electrode assembly 12 fills a large portion of the internal space of the housing 11. Therefore, the electrode assembly 12 can be filled more fully and tightly within the casing 11 of the battery cell 10, providing more internal support. This increases the solidity of the battery cell 10, enhancing its strength, rigidity, reliability, and durability, thus improving the overall strength, rigidity, reliability, and durability of the battery device 1. Furthermore, a high fill rate of the electrode assembly 12 means that the battery cell 10 contains more active material, thereby increasing the energy density of the battery cell 10 and ultimately improving the overall energy density of the battery device 1.

[0169] The outer casing 11 comprises at least one material selected from steel, aluminum, and titanium. The wall thickness of the outer casing 11 is 0.1 mm to 0.8 mm. The Vickers hardness of the outer casing 11 is 10 to 400. Based on this, the outer casing 11 of the battery cell 10 possesses better corrosion resistance, as well as higher strength and rigidity. It provides robust protection for components such as the electrode assembly 12 and provides reliable support for other battery cells, thereby improving the strength, rigidity, reliability, and durability of the battery cell 10, and consequently enhancing the overall strength, rigidity, reliability, and durability of the battery device 1. Furthermore, the wall thickness of the outer casing 11 is kept from being excessive, reducing its space occupation and providing more space for the active material inside the battery cell 10. This improves the space utilization and energy density of the battery cell 10, and consequently, the overall space utilization and energy density of the battery device 1. Furthermore, it can make the outer casing 11 more malleable, which facilitates the processing and molding of the outer casing 11, thereby improving the processing and molding convenience of the battery cell 10, which is conducive to improving the production efficiency of the battery cell 10 and reducing the production cost of the battery cell 10.

[0170] Please refer to Figures 1 and 4. Some embodiments of this application provide an electrical device, which includes the battery device 1 provided in the embodiments of this application.

[0171] By adopting the above solution, the electrical device can improve its structural reliability, space utilization and energy density by using the battery device 1 provided in the embodiments of this application.

[0172] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A battery device, wherein, include: A plurality of battery units, each battery unit comprising a plurality of individual battery cells, the plurality of battery units comprising a first battery unit and a second battery unit stacked adjacent to each other along the direction of gravity, wherein the plurality of individual battery cells of the first battery unit are arranged sequentially along a first direction, and the plurality of individual battery cells of the second battery unit are arranged sequentially along a second direction, wherein the first direction and the second direction are perpendicular.

2. The battery device according to claim 1, wherein, Multiple second battery cells are arranged in the same layer and spaced apart along the first direction.

3. The battery device according to claim 1 or 2, wherein, At least a portion of the first battery cell and at least a portion of the second battery cell are alternately arranged along the direction of gravity.

4. The battery device according to any one of claims 1-3, wherein, The battery cell includes a casing and electrode terminals; In at least one of the battery cells, the electrode terminal is disposed on one side of the housing along the height direction of the battery cell, the housing includes a first wall, the first wall includes a main body portion and a recess, the recess is recessed toward the interior of the housing relative to the main body portion, and the electrode terminal is disposed in the recess.

5. The battery device according to claim 4, wherein, The electrode terminals do not protrude from the main body.

6. The battery device according to any one of claims 1-5, wherein, The battery cell includes an electrode terminal; the electrode terminal of at least one of the battery cells is located on the end side of the battery cell along its own length direction.

7. The battery device according to any one of claims 1-6, wherein, The battery cell includes a pressure relief mechanism; the pressure relief mechanism of at least one of the battery cells is located on the end side of the battery cell along its own length direction.

8. The battery device according to any one of claims 1-7, wherein, The battery device includes a support member, which is stacked between two adjacent battery cells arranged along the direction of gravity.

9. The battery device according to claim 8, wherein, The support component is a thermal management component.

10. The battery device according to claim 8 or 9, wherein, The battery cell includes a casing and electrode terminals; In at least one of the battery cells, the electrode terminal is disposed on one side of the housing along the height direction of the battery cell. The housing includes a first wall, the first wall including a main body portion and a recess, the recess being recessed toward the interior of the housing relative to the main body portion, the electrode terminal being disposed in the recess, and the main body portion abutting against the corresponding support member.

11. The battery device according to any one of claims 1-10, wherein, Two adjacent battery cells of the same battery cell are bonded together.

12. The battery device according to any one of claims 1-11, wherein, The battery cell includes a housing and an electrode assembly disposed within the housing; Along the thickness direction of the battery cell, the electrode assembly occupies 90% to 100% of the area within the housing.

13. The battery device according to any one of claims 1-12, wherein, The battery cell includes a casing, electrode terminals, and an electrode assembly disposed within the casing; The electrode terminals are located on one side of the housing along the height direction of the battery cell and along the length direction of the battery cell. The electrode assembly occupies 90% to 100% of the housing. Alternatively, the electrode terminals are located on the end side of the housing along the length direction of the battery cell, and the electrode assembly occupies 80% to 100% of the housing along the length direction of the battery cell.

14. The battery device according to any one of claims 1-13, wherein, The battery cell includes a casing, electrode terminals, and an electrode assembly disposed within the casing; The electrode terminals are located on one side of the housing along the height direction of the battery cell, and the electrode assembly occupies 80% to 100% of the housing along the height direction of the battery cell. Alternatively, the electrode terminals are located on the end side of the housing along the length direction of the battery cell, and along the height direction of the battery cell, the electrode assembly occupies 90% to 100% of the housing.

15. The battery device according to any one of claims 1-14, wherein, The battery cell includes a casing, which includes at least one of steel, aluminum, and titanium materials.

16. The battery device according to any one of claims 1-15, wherein, The battery cell includes a casing, the wall thickness of which is 0.1mm to 0.8mm.

17. The battery device according to any one of claims 1-16, wherein, The battery cell includes a casing, and the Vickers hardness of the casing is 10 to 400.

18. An electrical appliance, wherein, The electrical device includes a battery device as described in any one of claims 1-17.

Images