Battery device and vehicle

Abstract

The utility model discloses a kind of battery device and vehicle, battery device includes cavity, first battery monomer and second battery monomer, cavity is equipped with first accommodating space, second accommodating space and sink groove;First battery monomer is arranged in first accommodating space, and first battery monomer has first electrode terminal;Second battery monomer is arranged in second accommodating space, and second battery monomer has second electrode terminal;Along second direction, the height of second battery monomer is greater than the height of first battery monomer, and the orientation of first electrode terminal and second electrode terminal is same.Such, in the height lower first accommodating space, the height lower first battery monomer is arranged, in the height larger second accommodating space, the height larger second battery monomer is arranged, such arrangement height differentiating battery monomer, can reasonably utilize the space of cavity, to improve the electric capacity of battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] In related technologies, electric vehicles include battery packs, which consist of individual battery cells that provide power to the electric vehicle. To increase the battery pack's capacity, its structure requires further improvement. Utility Model Content

[0004] This application provides a battery device and a vehicle that can increase the battery device's electrical capacity.

[0005] The battery device according to this application includes a cavity, a first battery cell, and a second battery cell. The cavity has a first accommodating space, a second accommodating space, and a recess. The length direction of the battery device is defined as a first direction, and the height direction of the cavity is defined as a second direction. The first accommodating space and the second accommodating space are arranged along the first direction. Along the second direction, the height of the second accommodating space is greater than the height of the first accommodating space. The recess is formed at the top of the cavity and is arranged with the first accommodating space in the second direction. The first battery cell is disposed in the first accommodating space and has a first electrode terminal. The second battery cell is disposed in the second accommodating space and has a second electrode terminal. Along the second direction, the height of the second battery cell is greater than the height of the first battery cell, and the first electrode terminal and the second electrode terminal have the same orientation.

[0006] In the battery device of this application embodiment, a shorter first battery cell is disposed in a first accommodating space with a lower height, and a taller second battery cell is disposed in a second accommodating space with a higher height. This arrangement of battery cells with different heights allows for efficient use of the cavity space, thereby increasing the battery device's capacity. Furthermore, the first electrode terminals of the first battery cell and the second electrode terminals of the second battery cell face the same direction, facilitating electrical management of both the first and second battery cells.

[0007] In some embodiments, there are multiple first battery cells, arranged in a single layer. In the above technical solution, the single-layer arrangement of the first battery cells facilitates the management of multiple first battery cells.

[0008] In some embodiments, there are multiple second battery cells, arranged in a single layer. In the above technical solution, the single-layer arrangement of the second battery cells facilitates the management of multiple second battery cells.

[0009] In some embodiments, the volume of the second battery cell is larger than that of the first battery cell. In the above technical solution, the capacity of the second battery cell can be greater than that of the first battery cell, satisfying the requirement that the first and second battery cells can be arranged in different positions within the cavity.

[0010] In some embodiments, the cavity includes a longitudinal beam, a bottom plate, and a cover plate. The longitudinal beam extends along the first direction. The bottom plate and the cover plate are disposed opposite to each other and are both disposed on the longitudinal beam. A first accommodating space and a second accommodating space are formed between the longitudinal beam, the bottom plate, and the cover plate. The settling groove is formed between the cover plate and the longitudinal beam.

[0011] In the above technical solution, the longitudinal beam, the bottom plate and the cover plate together form a first accommodating space, a second accommodating space and a sink, thereby making the structure of the cavity stable and protecting the first battery cell and the second battery cell.

[0012] In some embodiments, the cover plate includes a first plate and a second plate connected to the first plate. The first plate is used to form the first accommodating space, and the second plate is used to form the second accommodating space. A recess is formed on the side of the first plate away from the first accommodating space. The sink includes the recess. The cavity also includes a sealing plate, which is disposed between the first battery cell and the first plate and abuts against the first plate.

[0013] In the above technical solution, the recessed part can facilitate the placement of the occupant's feet, and the sealing plate can restrict the position of the first battery cell, making the position of the first battery cell more stable.

[0014] In some embodiments, the portion of the first plate opposite to the first battery cell is bent, and the portion of the sealing plate opposite to the first battery cell is flat.

[0015] In the above embodiments, the first plate, which is partially bent, is prone to forming a recess, and the sealing plate, which is at least partially flat, can restrict the position of the first battery cell, which is beneficial to improving the installation stability of the first battery cell.

[0016] In some embodiments, the bottom surface of the recess is a plane. In the above technical solution, the bottom surface of the recess facilitates footing for passengers, improving the user experience.

[0017] In some embodiments, the cover plate includes a first plate and a second plate, the first plate forming the first accommodating space and the second plate forming the second accommodating space, wherein the first plate and the second plate are separate structures.

[0018] In the above technical solution, since the cover plate has different heights at various positions, the first plate and the second plate are separate structures, which makes it easier to install the cover plate.

[0019] In some embodiments, the longitudinal beam includes a main beam and a mounting beam connected to the side of the main beam. The mounting beam has a first mounting surface and a second mounting surface. Along the second direction, the height of the first mounting surface is lower than the height of the second mounting surface. The edge of the first plate overlaps the first mounting surface, and the edge of the second plate overlaps the second mounting surface.

[0020] In the above technical solution, the first mounting surface and the second mounting surface of the mounting beam facilitate the installation of the first plate and the second plate, making the installation of the first plate and the second plate more stable.

[0021] In some embodiments, there are two longitudinal beams arranged opposite each other. The cavity also includes at least two crossbeams, with each end of the crossbeam connected to a corresponding longitudinal beam. The at least two crossbeams are arranged along the first direction. The first accommodating space is located between two adjacent crossbeams. The first accommodating space and the second accommodating space are located on both sides of one of the crossbeams. The cover plate overlaps the crossbeam.

[0022] In the above technical solution, the two longitudinal beams and at least two transverse beams make the cavity structure more stable, which is beneficial to the stability of the cover plate installation.

[0023] In some embodiments, there are multiple second accommodating spaces, and the first accommodating space is provided with second accommodating spaces on both sides along the first direction, and each second accommodating space is provided with a second battery cell.

[0024] In the above technical solution, each second accommodating space is provided with a second battery cell, which can increase the battery capacity of the battery device.

[0025] The vehicle described in this application has a battery device according to any of the above embodiments.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0029] Figure 2 This is a perspective view of a battery device according to some embodiments of this application;

[0030] Figure 3 This is a cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0031] Figure 4 This is a partially enlarged cross-sectional schematic diagram of a battery device according to some embodiments of this application;

[0032] Figure 5 This is a perspective view of a battery device according to other embodiments of this application;

[0033] Figure 6 This is a cross-sectional schematic diagram of a battery device according to other embodiments of this application;

[0034] Figure 7 This is a partially enlarged cross-sectional schematic diagram of a battery device according to other embodiments of this application;

[0035] Figure 8 This is a perspective view of the longitudinal beams in some embodiments of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100-Battery assembly; 10-Cavity; 11-First accommodating space; 12-Second accommodating space; 13-Settling tank; 14-Longitudinal beam; 141-Main beam; 142-Mounting beam; 1421-First mounting surface; 1422-Second mounting surface; 1423-Defect portion; 15-Base plate; 16-Cover plate; 161-First plate; 1611-Recess; 1612-Process space; 162-Second plate; 17-Sealing plate; 18-Crossbeam; 20-First battery cell; 21-First electrode terminal; 30-Second battery cell; 31-Second electrode terminal; 200-Controller; 300-Motor; 1000-Vehicle. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0044] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0046] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0047] In related technologies, electric vehicles include battery packs, which consist of individual battery cells that provide power to the vehicle. To increase the battery pack's capacity, its structure requires further improvement. For example, in some battery packs, all individual battery cells are of the same size, but the internal space varies in height. To accommodate all the cells within the internal space, smaller cells must be used. This results in redundant space within the taller internal area, hindering efforts to increase the battery pack's capacity.

[0048] Therefore, this application provides a battery device, which includes a cavity, a first battery cell, and a second battery cell. The cavity has a first accommodating space, a second accommodating space, and a sink. The length direction of the cavity is defined as a first direction, and the height direction of the cavity is defined as a second direction. The first accommodating space and the second accommodating space are arranged along the first direction. Along the second direction, the height of the second accommodating space is greater than the height of the first accommodating space. The sink is formed at the top of the cavity and is arranged with the first accommodating space in the second direction. The first battery cell is disposed in the first accommodating space and has a first electrode terminal. The second battery cell is disposed in the second accommodating space and has a second electrode terminal. Along the second direction, the height of the second battery cell is greater than the height of the first battery cell, and the first electrode terminal and the second electrode terminal have the same orientation.

[0049] In the battery device of this application embodiment, a shorter first battery cell is disposed in a first accommodating space with a lower height, and a taller second battery cell is disposed in a second accommodating space with a higher height. This arrangement of battery cells with different heights allows for efficient use of the cavity space, thereby increasing the battery device's capacity. Furthermore, the first electrode terminals of the first battery cell and the second electrode terminals of the second battery cell face the same direction, facilitating electrical management of both the first and second battery cells.

[0050] Please refer to Figure 1 This application provides a battery device 100 that can be used in a vehicle 1000. The vehicle 1000 can be a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. Further, the vehicle 1000 can be a commercial vehicle, such as a light truck. The vehicle 1000 includes the battery device 100, which can be located in the middle, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 100 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0051] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0052] Please see Figures 2-4The battery device 100 of this application includes a cavity 10, a first battery cell 20, and a second battery cell 30. The cavity 10 is provided with a first accommodating space 11, a second accommodating space 12, and a sink 13. The length direction of the cavity 10 is defined as the first direction X, and the height direction of the cavity 10 is defined as the second direction Y. The first accommodating space 11 and the second accommodating space 12 are arranged along the first direction X. Along the second direction Y, the height of the second accommodating space 12 is greater than the height of the first accommodating space 11. The sink 13 is formed at the top of the cavity 10 and is arranged with the first accommodating space 11 in the second direction Y. The first battery cell 20 is disposed in the first accommodating space 11 and has a first electrode terminal 21. The second battery cell 30 is disposed in the second accommodating space 12 and has a second electrode terminal 31. Along the second direction Y, the height of the second battery cell 30 is greater than the height of the first battery cell 20, and the first electrode terminal 21 and the second electrode terminal 31 have the same orientation.

[0053] Specifically, the cavity 10 is the main body of the battery device 100. The cavity 10 can form part of the chassis structure of the vehicle 1000. The cavity 10 can provide housing space for battery cells. For example, the first housing space 11 can provide housing space for the first battery cell 20, and the second housing space 12 can provide housing space for the second battery cell 30.

[0054] The length direction of the battery device 100 is also the length direction of the vehicle 1000, meaning the length direction of the vehicle 1000 is the same as the first direction X. The height direction of the battery device 100 is also the height direction of the vehicle 1000, meaning the height direction of the vehicle 1000 is the same as the second direction Y. Therefore, the first accommodating space 11 and the second accommodating space 12 are arranged along the length direction of the vehicle 1000. The first accommodating space 11 and the sink 13 are arranged along the height direction of the vehicle 1000, and the sink 13 is located above the first accommodating space 11.

[0055] The recess 13 primarily provides footrests for occupants within the vehicle 1000, allowing their feet to rest comfortably within the recess 13. For example, the vehicle 1000's seats can be positioned above the second accommodating space 12, allowing occupants to naturally place their feet within the recess 13 when seated. The recess 13 can be a square or similar shaped groove.

[0056] The electrode terminals of a battery cell are conductive components that enable the charging and discharging of the battery cell. For example, the first electrode terminal 21 is a conductive component that enables the charging and discharging of the first battery cell 20. The first electrode terminal 21 and the second electrode terminal 31 are oriented in the same direction, which facilitates electrical connection between the first battery cell 20 and the second battery cell 30, or allows both the first battery cell 20 and the second battery cell 30 to be connected to an external circuit. The first battery cell 20 and the second battery cell 30 can be connected in series, in parallel, or in a series-parallel configuration.

[0057] Battery cells may include lithium-ion rechargeable batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and this application embodiment is not limited to these. Battery cells may be cylindrical, flat, cuboid, or other shapes, etc., and this application embodiment is not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this application embodiment is not limited to these.

[0058] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated current collector protrudes beyond the coated current collector, serving as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. To ensure that the membrane does not melt when carrying a large current, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together. The diaphragm material can be PP (polypropylene) or PE (polyethylene), etc.

[0059] It should be noted that the battery cell mentioned above can be either the first battery cell 20 or the second battery cell 30.

[0060] Therefore, in the battery device 100 of this application embodiment, a lower-height first battery cell 20 is disposed in a lower-height first accommodating space 11, and a higher-height second battery cell 30 is disposed in a higher-height second accommodating space 12. This arrangement of battery cells with different heights allows for efficient use of the space in the cavity 10, thereby increasing the capacity of the battery device 100. Furthermore, the first electrode terminal 21 of the first battery cell 20 and the second electrode terminal 31 of the second battery cell 30 have the same orientation, facilitating electrical management of both the first and second battery cells 20.

[0061] Please see Figure 4 In some embodiments, there are multiple first battery cells 20 arranged in a single layer. Specifically, the multiple first battery cells 20 can have the same shape. The multiple first battery cells 20 can be arranged in a matrix. A single-layer arrangement of multiple first battery cells 20 means that there is only one first battery cell 20 in the second direction Y. The first electrode terminals 21 of the multiple first battery cells 20 all face the same side. When multiple first battery cells 20 are arranged in a single layer, it is convenient to electrically connect the multiple first battery cells 20 and easier to wire, facilitating the monitoring of parameters such as voltage, current, and temperature of the first battery cells 20. Thus, in the above technical solution, the single-layer arrangement of the first battery cells 20 facilitates the management of multiple first battery cells 20.

[0062] Please see Figure 4 In some embodiments, there are multiple second battery cells 30 arranged in a single layer. Specifically, the multiple second battery cells 30 can have the same shape. The multiple second battery cells 30 can be arranged in a matrix. A single-layer arrangement of multiple second battery cells 30 means that there is only one second battery cell 30 in the second direction Y. The second electrode terminals 31 of the multiple second battery cells 30 all face the same side. When multiple second battery cells 30 are arranged in a single layer, it is convenient to electrically connect the multiple second battery cells 30 and easier to wire, facilitating the monitoring of parameters such as voltage, current, and temperature of the second battery cells 30. Thus, in the above technical solution, the single-layer arrangement of the second battery cells 30 facilitates the management of multiple second battery cells 30.

[0063] In some embodiments, the volume of the second battery cell 30 is larger than the volume of the first battery cell 20. Alternatively, the second battery cell 30 is taller than the first battery cell 20, and its volume is also larger. This allows the capacity of the second battery cell 30 to be greater than that of the first battery cell 20, enabling the arrangement of battery cells with different capacities within the internal space of the battery device 100, thus achieving differentiated battery cell arrangement. Therefore, in the above technical solution, the capacity of the second battery cell 30 can be greater than that of the first battery cell 20, satisfying the requirement that the first battery cell 20 and the second battery cell 30 can be arranged in different positions within the cavity 10.

[0064] Please see Figures 2-4 In some embodiments, the cavity 10 includes a longitudinal beam 14, a bottom plate 15, and a cover plate 16. The longitudinal beam 14 extends along a first direction X. The bottom plate 15 and the cover plate 16 are disposed opposite to each other and are both disposed on the longitudinal beam 14. A first accommodating space 11 and a second accommodating space 12 are formed between the longitudinal beam 14, the bottom plate 15, and the cover plate 16. A sinkhole 13 is formed between the cover plate 16 and the longitudinal beam 14.

[0065] Specifically, the longitudinal beam 14 is the main load-bearing component of the cavity 10. The longitudinal beam 14 can serve as a sill beam for the vehicle 1000, extending along the first direction X, that is, along the length of the vehicle 1000. The base plate 15, also known as the bottom guard plate, is typically located at the bottom of the longitudinal beam 14 and serves to protect the first battery cell 20 and the second battery cell 30. The base plate 15 can be fixed to the longitudinal beam 14 using screws, bolts, rivets, adhesives, etc. The bottom surface of the base plate 15 can be a flat surface to facilitate the storage and transportation of the battery assembly 100.

[0066] A cover plate 16 is mounted on the longitudinal beam 14 and serves as the floor of the vehicle 1000. The cover plate 16 can be fixed to the longitudinal beam 14 using screws, bolts, rivets, adhesive, or other methods. The longitudinal beam 14, the base plate 15, and the cover plate 16 can together form a first accommodating space 11 and a second accommodating space 12. At least a portion of the cover plate 16 can be located below the top of the longitudinal beam 14, thereby forming a recess 13 with the cover plate 16 and the longitudinal beam 14.

[0067] Thus, in the above technical solution, the longitudinal beam 14, the bottom plate 15 and the cover plate 16 together form the first accommodating space 11, the second accommodating space 12 and the sink 13, thereby making the structure of the cavity 10 stable and protecting the first battery cell 20 and the second battery cell 30.

[0068] Please see Figures 2-4In some embodiments, the cover plate 16 includes a first plate 161 and a second plate 162 connected to the first plate 161. The first plate 161 is used to form a first accommodating space 11, and the second plate 162 is used to form a second accommodating space 12. A recess 1611 is formed on the side of the first plate 161 away from the first accommodating space 11. The sink 13 includes the recess 1611. The cavity 10 also includes a sealing plate 17, which is disposed between the first battery cell 20 and the first plate 161 and abuts against the first plate 161.

[0069] Specifically, the first plate 161, the base plate 15, and the longitudinal beam 14 can be joined to form the first accommodating space 11. The first plate 161 can be connected to the longitudinal beam 14 by means of screws, bolts, rivets, adhesives, welding, etc. The first plate 161 can be bent, and the recessed portion 1611 can be formed by stamping, thus forming a recessed portion 1611 on one side of the first plate 161, making the side of the first plate 161 facing the base plate 15 protrude. The recessed portion 1611 and the first accommodating space 11 are located on both sides of the first plate 161, respectively. The corners of the recessed portion 1611 can be rounded to make the first plate 161 easier to manufacture.

[0070] The second plate 162, the base plate 15, and the longitudinal beam 14 can be combined to form a second accommodating space 12. The second plate 162 can be flat. The second plate 162 can be connected to the longitudinal beam 14 by means of screws, bolts, rivets, adhesives, welding, etc. The first plate 161 and the second plate 162 can be an integral structure.

[0071] As mentioned above, the first plate 161 is bent, and the corner of the recessed portion 1611 can be rounded or beveled. Therefore, the corner of the first plate 161 facing the first accommodating space 11 forms a process space 1612. These process spaces 1612 prevent the first plate 161 from being connected to the first battery cell 20, which may cause poor positional constraint of the first battery cell 20. The flat portion of the sealing plate 17 can restrict the position of the first battery cell 20, making the position of the first battery cell 20 more stable.

[0072] Therefore, in the above technical solution, the recessed portion 1611 can facilitate the placement of the occupant's feet, and the sealing plate 17 can restrict the position of the first battery cell 20, making the position of the first battery cell 20 more stable.

[0073] In some embodiments, the portion of the first plate 161 opposite to the first battery cell 20 is bent, and the portion of the sealing plate 17 opposite to the first battery cell 20 is flat. For example, the first plate 161 is bent from the edge toward the first battery cell 20.

[0074] In the above embodiments, the first plate 161, which is partially bent, is prone to forming a recess 1611, and the sealing plate 17, which is at least partially flat, can restrict the position of the first battery cell 20, which is beneficial to improving the installation stability of the first battery cell 20.

[0075] In some embodiments, the bottom surface of the recess 1611 is a plane. Since the occupant's feet can step on the bottom surface of the recess 1611, in the above technical solution, the bottom surface of the recess 1611 is convenient for the occupant to step on, thus improving the user experience.

[0076] Please see Figures 5-7 In some embodiments, the cover plate 16 includes a first plate 161 and a second plate 162. The first plate 161 is used to form a first accommodating space 11, and the second plate 162 is used to form a second accommodating space 12. The first plate 161 and the second plate 162 are separate structures.

[0077] Specifically, the first plate 161 and the second plate 162 are two separable plates, and each plate is individually connected to the longitudinal beam 14. Thus, in the above technical solution, since the cover plate 16 has various positions with different heights, the first plate 161 and the second plate 162 are separate structures, which makes the installation of the cover plate 16 more convenient.

[0078] Please see Figures 5-8 In some embodiments, the longitudinal beam 14 includes a main beam 141 and a mounting beam 142 connected to the side of the main beam 141. The mounting beam 142 has a first mounting surface 1421 and a second mounting surface 1422. Along the second direction Y, the height of the first mounting surface 1421 is lower than the height of the second mounting surface 1422. The edge of the first plate 161 overlaps the first mounting surface 1421, and the edge of the second plate 162 overlaps the second mounting surface 1422.

[0079] Specifically, the main beam 141 may have a rectangular cross-section, and the mounting beam 142 may be fixed to the main beam 141 by welding, integral molding, bonding, or other methods. The first mounting surface 1421 and the second mounting surface 1422 both face upwards, or in other words, the first mounting surface 1421 and the second mounting surface 1422 are both set away from the base plate 15.

[0080] A defect 1423 can be formed on the mounting beam 142. The bottom surface of the defect 1423 forms a first mounting surface 1421, and the top surface of the mounting beam 142 forms a second mounting surface 1422. This makes the position of the first mounting surface 1421 lower than the position of the second mounting surface 1422, or in other words, the first mounting surface 1421 is set closer to the base plate 15 than the second mounting surface 1422.

[0081] In the above technical solution, the first mounting surface 1421 and the second mounting surface 1422 of the mounting beam 142 facilitate the installation of the first plate 161 and the second plate 162, making the installation of the first plate 161 and the second plate 162 more stable.

[0082] Please see Figure 2 , Figure 4 , Figure 5 and Figure 7 In some embodiments, there are two longitudinal beams 14, which are arranged opposite to each other. The cavity 10 also includes at least two crossbeams 18, with the two ends of the crossbeams 18 respectively connected to the corresponding longitudinal beams 14. The at least two crossbeams 18 are arranged along the first direction X. The first accommodating space 11 is located between two adjacent crossbeams 18. The first accommodating space 11 and the second accommodating space 12 are located on both sides of one of the crossbeams 18. The cover plate 16 overlaps the crossbeam 18.

[0083] Specifically, the number of crossbeams 18 can be 2, 3, 4, 5, etc. Crossbeams 18 can also be called expansion beams, and they can limit the degree of expansion and deformation of the first battery cell 20 and the second battery cell 30. The two ends of the crossbeams 18 can be welded to the longitudinal beams 14, making the structure of the crossbeams 18 and the longitudinal beams 14 stable.

[0084] like Figure 4 As shown, when the cavity 10 has a sealing plate 17, the sealing plate 17 can be bent, and the edge of the sealing plate 17 can overlap the top of the crossbeam 18. The sealing plate 17 can be fixed to the crossbeam 18 by means of screws, welding, or bonding. For example, the cover plate 16 can be fixed to the crossbeam 18 by means of screws, welding, or bonding. In this way, the two longitudinal beams 14 and at least two crossbeams 18 make the structure of the cavity 10 more stable, which is beneficial to improving the stability of the cover plate 16 during installation.

[0085] Please see Figure 4 and Figure 6 In some embodiments, there are multiple second accommodating spaces 12, and the first accommodating space 11 is provided with second accommodating spaces 12 on both sides along the first direction X, and each second accommodating space 12 is provided with a second battery cell 30.

[0086] Specifically, the number of second accommodating spaces 12 can be 2, 3, 4, etc. The volume of the second accommodating space 12 can be larger than the volume of the first accommodating space 11. Thus, in the above technical solution, each second accommodating space 12 is provided with a second battery cell 30, which can increase the capacity of the battery device 100.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The cavity has a first accommodating space, a second accommodating space, and a sink. The length direction of the battery device is defined as the first direction, and the height direction of the battery device is defined as the second direction. The first accommodating space and the second accommodating space are arranged along the first direction. Along the second direction, the height of the second accommodating space is greater than the height of the first accommodating space. The sink is formed at the top of the cavity and is arranged with the first accommodating space in the second direction. A first battery cell is disposed in the first accommodating space and has a first electrode terminal. The second battery cell is disposed in the second accommodating space and has a second electrode terminal. Along the second direction, the height of the second battery cell is greater than the height of the first battery cell, and the first electrode terminal and the second electrode terminal are oriented in the same direction.

2. The battery device according to claim 1, characterized in that, The number of the first battery cells is multiple, and the multiple first battery cells are arranged in a single layer; and / or, The number of the second battery cells is multiple, and the multiple second battery cells are arranged in a single layer.

3. The battery device according to claim 1, characterized in that, The volume of the second battery cell is larger than the volume of the first battery cell.

4. The battery device according to claim 1, characterized in that, The cavity includes a longitudinal beam, a bottom plate, and a cover plate. The longitudinal beam extends along the first direction. The bottom plate and the cover plate are arranged opposite to each other and are both disposed on the longitudinal beam. A first accommodating space and a second accommodating space are formed between the longitudinal beam, the bottom plate, and the cover plate. The sinkhole is formed between the cover plate and the longitudinal beam.

5. The battery device according to claim 4, characterized in that, The cover plate includes a first plate and a second plate connected to the first plate. The first plate is used to form the first accommodating space, and the second plate is used to form the second accommodating space. A recess is formed on the side of the first plate away from the first accommodating space. The sink includes the recess. The cavity also includes a sealing plate. The sealing plate is disposed between the first battery cell and the first plate and abuts against the first plate.

6. The battery device according to claim 5, characterized in that, The portion of the first plate opposite to the first battery cell is bent, and the portion of the sealing plate opposite to the first battery cell is flat.

7. The battery device according to claim 5, characterized in that, The bottom surface of the recess is a plane.

8. The battery device according to claim 4, characterized in that, The cover plate includes a first plate and a second plate. The first plate is used to form the first accommodating space, and the second plate is used to form the second accommodating space. The first plate and the second plate are separate structures.

9. The battery device according to claim 5 or 8, characterized in that, The longitudinal beam includes a main beam and a mounting beam connected to the side of the main beam. The mounting beam has a first mounting surface and a second mounting surface. Along the second direction, the height of the first mounting surface is lower than the height of the second mounting surface. The edge of the first plate overlaps the first mounting surface, and the edge of the second plate overlaps the second mounting surface.

10. The battery device according to claim 4, characterized in that, The number of longitudinal beams is two, and the two longitudinal beams are arranged opposite each other. The cavity also includes at least two cross beams, and the two ends of the cross beams are respectively connected to the corresponding longitudinal beams. The at least two cross beams are arranged along the first direction. The first accommodating space is located between two adjacent cross beams. The first accommodating space and the second accommodating space are respectively located on both sides of one of the cross beams. The cover plate overlaps the cross beam.

11. The battery device according to claim 1, characterized in that, The number of second accommodating spaces is multiple, and the first accommodating space is provided with second accommodating spaces on both sides along the first direction, and each second accommodating space is provided with a second battery cell.

12. A vehicle, characterized in that, The vehicle includes the battery device according to any one of claims 1-11.

Images