Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device includes: a battery cell assembly including at least one battery cell; the box body assembly comprises a box body and a cover plate, the box body is provided with an opening, the cover plate covers the opening to form a first accommodating space together with the box body, and the battery monomer assembly is located in the first accommodating space; an electrical component; the first plate is arranged on the side, away from the first containing space, of the cover plate, the first plate covers the cover plate to form a second containing space, and the electrical assembly is located in the second containing space; the cover plate protrudes towards the second containing space to form a protruding part, and the surface, facing the first containing space, of the protruding part is sunken to form a groove. The space utilization rate of the battery device is improved, the structure of the battery device is more compact, and the energy density of the battery device is improved.

Description

Technical Field

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

[0002] With the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in the field of energy storage.

[0003] As the industry's requirements for volume utilization and lightweight of battery devices continue to increase, battery devices tend to be smaller and thinner. In this case, improving the space utilization of battery devices is one of the research directions of the industry. Utility Model Content

[0004] To solve the above technical problems, this application adopts the following technical solutions.

[0005] A first aspect of an embodiment of the present application provides a battery device, comprising: a battery cell assembly, comprising at least one battery cell; a box assembly, comprising a box and a cover plate, the box having an opening, the cover plate covering the opening to form a first accommodating space together with the box, the battery cell assembly being located in the first accommodating space; an electrical component; a first plate, disposed on a side of the cover plate facing away from the first accommodating space, the first plate covering the cover plate to form a second accommodating space, the electrical component being located in the second accommodating space; wherein the cover plate protrudes toward the second accommodating space to form a protrusion, and is recessed on the surface of the protrusion facing the first accommodating space to form a groove.

[0006] Since the battery cell assembly is located in the first storage space, and the electrical assembly is located in the second storage space away from the first storage space, the electrical assembly can be placed separately from the battery cell assembly, so that the electrical assembly does not occupy the space for accommodating the battery cell assembly, which is conducive to improving the regularity of the first storage space, so that the first storage space in the box only accommodates the battery cell assembly, so that the arrangement of the battery cell assembly in the first storage space can be more compact, which is conducive to improving the energy density of the battery device without changing the volume of the first storage space. Moreover, the first plate can be set in shape and size according to the electrical assembly that is actually required to be arranged, so that only a small part of the space above the cover plate is occupied to form the second storage space to accommodate the electrical assembly, without occupying the entire space above the cover plate, which is more convenient for the installation of the battery device and is conducive to improving the space utilization rate of the battery device.

[0007] In addition, since the cover plate protrudes toward the second accommodation space to form a protruding portion, and the surface of the protruding portion facing the first accommodation space is recessed to form a groove, at least part of the structural members, busbars, etc. for connecting the battery cell assemblies can be accommodated in the space of the groove formed by the protruding portion, thereby facilitating the reduction of the occupation of the first accommodation space by these structural members, busbars, etc., further improving the regularity of the first accommodation space, and further improving the energy density of the battery device without changing the volume of the first accommodation space.

[0008] In some embodiments, the first plate member covers the cover plate along a first direction. The electrical assembly includes a first electrical component and a second electrical component. The maximum dimension of the first electrical component along the first direction is smaller than the maximum dimension of the second electrical component along the first direction. When projected along the first direction onto a projection plane perpendicular to the first direction, at least part of the projection of the first electrical component coincides with the projection of the protruding portion, and the projection of the second electrical component is completely misaligned with the projection of the protruding portion.

[0009] Thus, the first electrical component with a smaller dimension along the first direction can be arranged on the protruding portion, and the second electrical component with a larger dimension along the first direction can be arranged at a position outside the protruding portion, so that the overall height of the electrical assembly is relatively average, and further the overall electrical assembly does not occupy too much space along the first direction, making the space utilization of the second region more reasonable. In this way, while fully arranging the electrical assembly, the dimension of the first plate member along the first direction will not be too large, which is beneficial to the integration and miniaturization of the battery device.

[0010] In some embodiments, the first electrical component is a resistor, and the second electrical component is a fuse or a relay.

[0011] Thus, according to the dimensions of different electrical assemblies along the first direction, electrical components such as resistors, fuses, and relays can be reasonably arranged in the second accommodation space, improving the regularity of the second accommodation space and the space utilization rate of the battery device.

[0012] In some embodiments, the electrical assembly includes a plurality of electrical components, and at least two of the plurality of electrical components have a first spacing space in a second direction perpendicular to the first direction. When projected along the first direction onto a projection plane perpendicular to the first direction, the projection of the first spacing space covers at least part of the projection of the protruding portion.

[0013] Thus, the protruding portion can reasonably borrow part of the area in the second accommodation space without affecting the arrangement of the electrical components, making the overall layout of the battery device more compact and regular, which is beneficial to improving the space utilization rate of the battery device and facilitating the miniaturization of the battery device.

[0014] In some embodiments, the electrical component includes a plurality of electrical elements, at least some of the plurality of electrical elements are arranged in a first region, and at least some other of the plurality of electrical elements are arranged in a second region. The first region and the second region have a second spacing space in a second direction perpendicular to the first direction. When projected along the first direction onto a projection plane perpendicular to the first direction, the projection of the second spacing space covers at least part of the projection of the protruding portion.

[0015] Thereby, without affecting the arrangement of the electrical elements, the protruding portion can reasonably borrow part of the area in the second accommodation space, making the overall layout of the battery device more compact and regular, which is beneficial to improving the space utilization rate of the battery device and facilitating the miniaturization of the battery device.

[0016] In some embodiments, the battery device further includes an electrical connector for connecting the electrical elements located in the first region and the second region respectively, and at least part of the electrical connector is located in the second spacing space.

[0017] Thereby, the electrical connector for connecting the electrical elements in the two regions can make full use of at least part of the area of the second spacing space, making the layout of the overall electrical elements and the electrical connector more reasonable, so as to reduce the waste of space and appropriately reduce the size of the second accommodation space.

[0018] In some embodiments, the battery device further includes a carrier for carrying the electrical elements located in the first region. The carrier protrudes in a direction away from the first accommodation space to form an accommodation portion on the surface facing the first accommodation space, and at least part of the protruding portion is located in the accommodation portion.

[0019] Thereby, the electrical elements in the first region can be integrated on the carrier, thereby improving the degree of integration of the electrical elements and being more conducive to saving the space occupied by the electrical elements. Moreover, the carrier is formed with an accommodation portion. Through the cooperation of the protruding portion and the accommodation portion, the spacing distance between the protruding portion and the carrier is reduced, so that the carrier will not occupy too much space in the height direction (the first direction), which is beneficial to saving the size of the second accommodation space along the first direction and is more conducive to the miniaturization and integration of the battery device.

[0020] In some embodiments, the battery device further includes a carrier for carrying at least part of the electrical component. The carrier protrudes in a direction away from the first accommodation space to form an accommodation portion on the surface facing the first accommodation space, and at least part of the protruding portion is located in the accommodation portion.

[0021] Thus, at least part of the electrical components can be integrated on the carrier, thereby improving the degree of integration of the electrical components and being more conducive to saving the space occupied by the electrical components. Moreover, the carrier is formed with a receiving portion. Through the cooperation of the protruding portion and the receiving portion, the spacing distance between the protruding portion and the carrier is reduced, so that the carrier does not occupy too much space in the height direction (the first direction), which is beneficial to saving the size of the second receiving space in the first direction and is more conducive to the miniaturization and integration of the battery device.

[0022] In some embodiments, the first plate member includes a plurality of side wall portions connected to the cover plate. A third spacing space is provided between the electrical component and at least one of the plurality of side wall portions. Projecting along the first direction onto a projection plane perpendicular to the first direction, the projection of the third spacing space covers at least part of the projection of the protruding portion.

[0023] Thus, at least part of the first plate member covers the protruding portion, so that the protruding portion can partially extend into the area within the second receiving space formed by the first plate member and the cover plate, which is beneficial to reducing the size of the overall battery device in the first direction.

[0024] In some embodiments, projecting along the first direction onto a projection plane perpendicular to the first direction, at least part of the projection of the protruding portion is located outside the projection of the first plate member.

[0025] Thus, the protruding portion partially borrows the area of the second receiving space formed between the first plate member and the cover plate. Without affecting the realization of the functions of each electrical component, a certain amount of redundant space is saved, which is beneficial to improving the overall space utilization rate of the battery device and is more conducive to the miniaturization and integration of the battery device. Or when the overall volume of the battery device remains unchanged, it is beneficial to improve the energy density of the battery device.

[0026] In some embodiments, the first plate member is provided with an avoidance groove, and at least part of the protruding portion passes through the avoidance groove.

[0027] Thus, the first plate member can be reasonably and fully arranged above the cover plate having the protruding portion, so that the second receiving space can be relatively airtight, and dust, foreign objects, etc. from the outside are not easily introduced into the interior of the second receiving space, and the first plate member plays a good protective role for the electrical components in the second receiving space.

[0028] In some embodiments, the groove forms an installation space, and the opening of the groove faces the first receiving space so that the first receiving space communicates with the installation space; the battery device includes a first component located in the installation space, and at least part of the first component is located in the groove.

[0029] Accordingly, at least part of the structural members, bus bars, etc. used to connect the individual battery cells in the battery cell assembly can be accommodated in the installation space of the groove, which helps to reduce the occupation of the first accommodation space by these structural members, bus bars, etc., improve the regularity in the first accommodation space, and further improve the energy density of the battery device without changing the volume of the first accommodation space.

[0030] In some embodiments, the battery device includes a bus bar and a sampling assembly. The battery cell assembly is provided with an electrode lead-out portion. The bus bar is connected to the electrode lead-out portion. The sampling assembly is used to connect to the battery cell assembly to obtain information of the battery cell assembly. The first component includes at least one of the electrode lead-out portion, the bus bar, and the sampling assembly.

[0031] Accordingly, it is possible to reduce the occupation of the space for placing the battery cell assembly by one or more of the electrode lead-out portion, the bus bar, and the sampling assembly, which helps to make the space for placing the battery cell assembly in the box more regular and makes the structure of the battery device more compact.

[0032] In some embodiments, the first component includes the electrode lead-out portion, and at least part of the electrode lead-out portion is located in the groove.

[0033] At least part of the electrode lead-out portion is located in the groove, so that the main body portions of the remaining battery cell assemblies in the battery cell assembly except the electrode lead-out portion can be arranged closer to the inner wall of the cover plate, thereby improving the space utilization rate of the first accommodation space. Without changing the volume of the first accommodation space, the volume of the main body portion of the battery cell assembly can be appropriately increased, which helps to improve the energy density of the battery device.

[0034] In some embodiments, the battery cell assembly includes a first battery cell assembly. The first battery cell assembly includes a first electrode lead-out portion and a second electrode lead-out portion. The groove includes a first groove, and at least part of the first electrode lead-out portion and the second electrode lead-out portion are located in the first groove.

[0035] Accordingly, it is possible to displace at least part of the first electrode lead-out portion and the second electrode lead-out portion into the same groove, thereby improving the space utilization rate of the first groove, reducing the overall number of grooves, helping to reduce the processing difficulty of the cover plate, and thus reducing the production cost. Moreover, it is beneficial for the arrangement of the sampling assembly, making it easier for the sampling assembly to collect information of the first electrode lead-out portion and the second electrode lead-out portion simultaneously.

[0036] In some embodiments, the groove length of the first groove is greater than the groove width, and the distance between the farthest points of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove is less than half of the maximum dimension of the first battery cell assembly along the groove width direction of the first groove.

[0037] Thereby, the arrangement of the first electrode lead-out portion and the second electrode lead-out portion on the first battery cell assembly is made more compact, which is beneficial to reducing the size of the protruding portion and the overall outer contour size of the battery cell assembly, and is conducive to the miniaturization of the battery device. Moreover, the concentrated arrangement of the first electrode lead-out portion and the second electrode lead-out portion enables a larger flat space to be reserved at other positions of the battery cell assembly except for the electrode lead-out portion, thus facilitating the arrangement of other components of the battery cell assembly and improving the compactness of the battery device.

[0038] In some embodiments, the sampling assembly includes a first sampling assembly, the first sampling assembly is electrically connected to the first battery cell assembly, and at least a part of the first sampling assembly is located in the first groove.

[0039] Thereby, the first sampling assembly can sample the first electrode lead-out portion and the second electrode lead-out portion located in the first groove simultaneously, which is more convenient for the sampling of the first sampling assembly and can also save the number of sampling assemblies.

[0040] In some embodiments, the groove length of the first groove is greater than the groove width. Projecting onto a projection plane perpendicular to the groove length direction of the first groove along the groove length direction of the first groove, at least a part of the first electrode lead-out portion and the second electrode lead-out portion has an overlapping projection.

[0041] Thereby, the first electrode lead-out portion and the second electrode lead-out portion are generally on the same horizontal line along the groove length direction, so that the distance between the electrode lead-out portion and the edge of the groove can be reduced along the groove width direction, which is conducive to reducing the size of the groove along the groove width direction and the size of the battery cell assembly along the groove width direction, and improving the compactness of the battery device.

[0042] In some embodiments, the groove length of the first groove is greater than the groove width, the first battery cell assembly includes a first edge and a second edge oppositely arranged along the groove width direction of the first groove, the maximum distance between the first electrode lead-out portion and the first edge is less than the maximum distance between the first electrode lead-out portion and the second edge, and the maximum distance between the second electrode lead-out portion and the first edge is less than the maximum distance between the second electrode lead-out portion and the second edge.

[0043] As a result, both the first electrode lead-out portion and the second electrode lead-out portion are arranged close to the first edge. Without changing the overall size of the battery cell assembly, a relatively large flat space can be formed on one side of the battery cell assembly close to the second edge, thereby reserving a larger space for arranging the sampling assembly, bus bar, etc., and improving the layout flexibility.

[0044] In some embodiments, the first battery cell assembly includes a first edge and a second edge that are oppositely arranged along the groove width direction of the first groove. The sampling assembly includes a first sampling assembly, and the first sampling assembly is electrically connected to the first battery cell assembly. The first sampling assembly is located between the second edge and the one of the first electrode lead-out portion and the second electrode lead-out portion that is closer to the second edge.

[0045] As a result, the first sampling assembly can sample both the first electrode lead-out portion and the second electrode lead-out portion of the first battery cell assembly at the same time, and the first sampling assembly can be located in the relatively large flat space on the side of the first battery cell assembly close to the second edge, making full use of this flat area, which is beneficial to improving the space utilization rate of the battery device.

[0046] In some embodiments, the battery device further includes a first bus bar, and the first bus bar is used to electrically connect the first electrode lead-out portion and the electrode lead-out portions on other battery cell assemblies. At least a part of the first bus bar is located in the first groove.

[0047] As a result, the first bus bar does not occupy too much area in the accommodation space of the battery cell assembly, further improving the regularity in the first accommodation space. Without changing the volume of the first accommodation space, it is beneficial to improve the energy density of the battery device.

[0048] The second aspect of the present application provides an electrical device, and the electrical device includes the battery device described in the first aspect of the present application, and the battery device is used to provide electrical energy for the electrical device.

[0049] Since the electrical device adopts the battery device with the above-mentioned compact structure and high space utilization rate, as a result, without affecting the energy density of the battery device, the battery device occupies less space in the electrical device, which is beneficial to the layout of other components in the electrical device and improves the space utilization rate of the electrical device.

[0050] In some embodiments, the electrical device is a vehicle, and the vehicle further includes a seat, and at least a part of the second accommodation space is located under the seat.

[0051] Accordingly, integrating the electrical components in the second accommodation space can save the space occupied by the electrical components, so that the second accommodation space for accommodating the electrical components can be at least partially located under the seat, making full use of the space under the vehicle seat and improving the space utilization rate.

[0052] The beneficial effects of the embodiments of the present application include: providing a battery device and an electrical device with high space utilization rate. The electrical components in the battery device are placed separately from the battery cell components, so that the electrical components do not occupy the space for accommodating the battery cell components, but only occupy a small part of the space above the cover plate to form a second accommodation space for accommodating the electrical components, which is beneficial to improving the space utilization rate of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0054] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0055] Figure 2 is an exploded schematic structural diagram of a battery device provided by an embodiment of the present application;

[0056] Figure 3 is a schematic diagram of the installation position of the battery device of a vehicle provided by an embodiment of the present application;

[0057] Figure 4 is a schematic structural diagram of a battery device provided by an embodiment of the present application;

[0058] Figure 5 is an exploded schematic structural diagram of a battery device provided by an embodiment of the present application;

[0059] Figure 6 is a schematic structural diagram of a battery device provided by another embodiment of the present application;

[0060] Figure 7 is an exploded schematic structural diagram of a battery device provided by another embodiment of the present application;

[0061] Figure 8 is Figure 4 a cross-sectional view taken along line A-A in

[0062] Figure 9 is Figure 6 a cross-sectional view taken along line B-B in

[0063] Figure 10Schematic diagram of the internal structure of a battery device provided by an embodiment of the present application;

[0064] Figure 11 is Figure 10 Partial schematic diagram at position C in

[0065] Description of reference numerals

[0066] 1 - Battery cell assembly; 1a - First battery cell assembly; 10a - First edge; 20a - Second edge; 11 - Battery cell; 12 - Electrode lead-out part; 121 - First electrode lead-out part; 122 - Second electrode lead-out part; 2 - Box body assembly; 21 - Box body; 211 - Opening; 22 - Cover plate; 221 - Protrusion; 222 - Groove; 222a - First groove; 2221 - Installation space; 3 - Electrical component; 31 - First electrical component; 32 - Second electrical component; 33 - Electrical component; 4 - First plate member; 41 - Side wall part; 42 - Avoidance groove; 5 - Electrical connection member; 6 - Carrier; 61 - Accommodation part; 7 - First component; 8 - Busbar; 81 - First busbar; 9 - Sampling component; 91 - First sampling component; 10 - First accommodation space; 20 - Second accommodation space; 201 - First area; 202 - Second area; 30 - First interval space; 40 - Second interval space; 50 - Third interval space; 100 - Battery device; 200 - Controller; 300 - Motor; 1000 - Vehicle; 1001 - Seat. Detailed implementation manners

[0067] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0068] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0069] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two unless otherwise specifically defined.

[0070] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0071] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0072] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0073] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0074] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0075] Below, this application is described in detail.

[0076] At present, new energy batteries are increasingly used in life and industry. New energy batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0077] The battery device usually includes a box, a battery cell assembly and an electrical assembly. In the related art, the box is usually in the shape of a regular cuboid or cube, and the box usually has a parallel double-layer storage space, the battery cell assembly is located in the lower storage space, and the electrical assembly is located in the upper storage space. In order to ensure the electrical safety of the electrical assembly when arranging the electrical assembly, more space is usually reserved in the height direction (first direction), so that the upper space occupies a larger size in the height direction, thereby increasing the size of the box, and then increasing the size of the battery device, making it difficult to install the battery device in some electrical devices with limited space. If the size of the box is not changed, it will affect the size of the storage space for the battery cell assembly, thereby reducing the energy density of the battery device.

[0078] However, usually, electrical components do not occupy the entire upper space in the horizontal direction (second direction), which results in a partial waste of space inside the box, resulting in low space utilization, which is not conducive to reducing the size of the battery device and further not conducive to increasing the energy density of the battery device.

[0079] In view of the problems existing in the above-mentioned related technologies, the present application proposes a battery device, which includes a battery cell assembly, a box assembly, an electrical assembly and a first plate. The battery cell assembly includes at least one battery cell. The box assembly includes a box and a cover plate, the box has an opening, the cover plate covers the opening to form a first accommodation space together with the box, and the battery cell assembly is located in the first accommodation space. The first plate is arranged on the side of the cover plate away from the first accommodation space, the first plate is covered on the cover plate to form a second accommodation space, and the electrical assembly is located in the second accommodation space. The cover plate protrudes toward the second accommodation space to form a protrusion, and the surface of the protrusion facing the first accommodation space is recessed to form a groove.

[0080] Since the battery cell assembly is located in the first accommodation space and the electrical assembly is located in the second accommodation space away from the first accommodation space, the electrical assembly can be placed separately from the battery cell assembly so that the electrical assembly does not occupy the space for accommodating the battery cell assembly, which is beneficial to improving the regularity of the first accommodation space, so that the first accommodation space in the box only accommodates the battery cell assembly, and the arrangement of the battery cell assembly in the first accommodation space can be more compact, which is beneficial to improving the energy density of the battery device without changing the volume of the first accommodation space.

[0081] Moreover, the first plate member can be configured in terms of shape and size according to the electrical components arranged as required, so that only a small part of the space above the cover plate is occupied to form the second accommodation space for accommodating the electrical components, without occupying the entire space above the cover plate, which is more convenient for the installation of the battery device and is beneficial to improving the space utilization rate of the battery device.

[0082] In addition, since the cover plate protrudes towards the second accommodation space to form a protruding portion, and the surface of the protruding portion facing the first accommodation space is recessed to form a groove, at least part of the structural members, bus bars, etc. used to connect the battery cell components can be accommodated in the space of the groove formed by the protruding portion, which is beneficial to reducing the occupation of these structural members, bus bars, etc. on the first accommodation space, further improving the regularity degree in the first accommodation space, and further improving the energy density of the battery device without changing the volume of the first accommodation space.

[0083] The battery device provided by the embodiments of the present application can be but is not limited to being used in power consumption devices such as energy storage power systems, vehicles, ships, or aircraft, as well as energy storage devices such as energy storage containers and energy storage cabinets.

[0084] The embodiments of the present application provide a power consumption device including the above battery device for providing electric energy. The power consumption device includes but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0085] Next, in conjunction with Figures 1 to 11 Some embodiments of the present application will be described in detail.

[0086] Figure 1 is a schematic structural diagram of a vehicle provided by an embodiment of the present application; Figure 2 is an exploded schematic structural diagram of a battery device provided by an embodiment of the present application; Figure 3 is a schematic diagram of the installation position of the battery device of the vehicle provided by an embodiment of the present application; Figure 4 is a schematic structural diagram of a battery device provided by an embodiment of the present application;

[0087] Figure 5 is an exploded schematic structural diagram of a battery device provided by an embodiment of the present application; Figure 6 is a schematic structural diagram of a battery device provided by another embodiment of the present application; Figure 7 is an exploded schematic structural diagram of a battery device provided by another embodiment of the present application; Figure 8 is Figure 4Cross-sectional view taken along line A-A in [the figure]; Figure 9 is Figure 6 Cross-sectional view taken along line B-B in [the figure]; Figure 10 Schematic diagram of the internal structure of a battery device provided by an embodiment of the present application; Figure 11 is Figure 10 Partial schematic diagram at position C in [the figure].

[0088] In some embodiments of the present application, for the convenience of description, a first direction and a second direction are defined. The first direction and the second direction are perpendicular to each other. However, those skilled in the art should understand that the embodiments of the present application are not limited to the case where the two directions are perpendicular to each other. For the convenience of description, as shown by the arrows in Figures 1 to 11 [the figure], the direction of arrow Z is taken as the first direction, the direction of arrow X represents the length direction of the cover plate, the direction of arrow Y is taken as the width direction of the cover plate, and the second direction can be the length direction or the width direction of the cover plate. Sometimes, the direction in which arrow Z points along the first direction is also referred to as "upward", and the opposite direction is referred to as "downward".

[0089] The first aspect of the present application provides a battery device 100, as shown in Figure 2 , Figures 4 to 7 [the figure]. The battery device 100 includes a battery cell assembly 1, a box body assembly 2, an electrical component 3, and a first plate member 4. The battery cell assembly 1 includes at least one battery cell 11. The box body assembly 2 includes a box body 21 and a cover plate 22. The box body 21 has an opening 211, and the cover plate 22 covers the opening 211 to jointly form a first accommodation space 10 with the box body 21. The battery cell assembly 1 is located in the first accommodation space 10. The first plate member 4 is disposed on the side of the cover plate 22 facing away from the first accommodation space 10, and the first plate member 4 covers the cover plate 22 to form a second accommodation space 20. The electrical component 3 is located in the second accommodation space 20. Among them, the cover plate 22 protrudes toward the second accommodation space 20 to form a protruding portion 221, and a groove 222 is recessed on the surface of the protruding portion 221 facing the first accommodation space 10.

[0090] The battery cell 11 refers to a unit that can realize the mutual conversion of chemical energy and electrical energy, and can be used to manufacture the battery cell assembly 1 or the battery device 100, so as to supply power to an electrical device or an energy storage device.

[0091] The battery device 100 (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies 1 for providing voltage and capacity. The battery cell assembly 1 (Battery Cell Assembly) may include a plurality of battery cells 11, and the plurality of battery cells 11 are connected in series, parallel, or in a hybrid connection through a busbar component.

[0092] In the embodiments of the present application, the battery cell 11 is a secondary battery cell, which refers to a battery cell that can activate the active material through charging after discharging and can be used continuously.

[0093] The battery cell 11 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium-metal battery cell, a sodium-metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc. The embodiments of the present application do not limit this.

[0094] The battery cell 11 includes a housing and an electrode assembly.

[0095] The housing is the external protective housing of the battery cell, and an accommodation cavity is formed inside for encapsulating components such as the electrode assembly and electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0096] The electrode assembly is the component in the battery cell where electrochemical reactions occur. The electrode assembly is usually stacked along the thickness direction (stacking direction) of the battery cell.

[0097] The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode sheet and the negative electrode sheet. The separator is disposed between the positive electrode sheet and the negative electrode sheet, which can prevent the positive and negative electrode sheets from short-circuiting and at the same time allow active ions to pass through.

[0098] In some embodiments, the positive electrode sheet may include a positive electrode current collector and positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0099] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0100] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0101] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of the lithium-containing phosphate may include, but are not limited to, lithium iron phosphate (such as LiFePO4 (which can also be abbreviated as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and at least one of a composite material of lithium manganese iron phosphate and carbon.

[0102] In some embodiments, the positive electrode sheet can use a foam metal. The foam metal can be foam nickel, foam copper, foam aluminum, or foam alloy, etc. When the foam metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foam metal, and of course, the positive electrode active material can also be provided. As an example, a lithium source material, potassium metal, or sodium metal can also be filled and / or deposited in the foam metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0103] In some embodiments, the negative electrode sheet may include a negative electrode current collector.

[0104] As an example, the negative electrode current collector can use a metal foil, a foam metal, or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, nickel, carbon, or titanium, etc. can be used. The composite current collector may include a polymer material base layer and a metal layer. The foam metal can be foam nickel, foam copper, foam aluminum, or foam alloy, etc. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0105] In some embodiments, the separator is a separator membrane. The present application does not particularly limit the type of the separator membrane, and any publicly known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0106] As an example, the main material of the separator membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.

[0107] In some embodiments, the separator is a solid-state electrolyte.

[0108] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0109] In some embodiments, the electrode assembly has a laminated structure.

[0110] As an example, multiple positive electrode sheets and multiple negative electrode sheets may be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked.

[0111] As an example, multiple positive electrode sheets may be provided, and the negative electrode sheet is folded to form multiple folded segments arranged in a stacked manner, and a positive electrode sheet is clamped between adjacent folded segments.

[0112] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple folded segments arranged in a stacked manner.

[0113] As an example, multiple separators may be provided and are respectively disposed between any adjacent positive electrode sheet or negative electrode sheet.

[0114] As an example, the separators may be continuously provided and are disposed between any adjacent positive electrode sheet or negative electrode sheet by means of folding or winding.

[0115] In some embodiments, the battery cell 11 further includes an electrolyte, and the electrolyte functions to conduct ions between the positive and negative electrodes. The present application does not specifically limit the type of the electrolyte, and it can be selected according to requirements. The electrolyte can be liquid, gel-like or solid.

[0116] In some embodiments, the electrode assembly is provided with electrode tabs, and the electrode tabs can conduct current out of the electrode assembly or can conduct current into the electrode assembly. The electrode tabs include a positive electrode tab and a negative electrode tab.

[0117] In the battery device 100, there may be multiple battery cells 11, and the multiple battery cells 11 can be connected in series, in parallel or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 11. The multiple battery cells 11 can be directly connected in series, in parallel or in a hybrid connection together, and then the whole formed by the multiple battery cells 11 is placed in the box body assembly 2. Of course, the battery cells 11 can also be in the form that multiple battery cells 11 are first connected in series, in parallel or in a hybrid connection to form a battery cell assembly 1, and then the multiple battery cell assemblies 1 are connected in series, in parallel or in a hybrid connection to form a whole and are accommodated in the box body assembly 2. The battery device 100 may further include other structures. For example, the battery device 100 may further include a bus bar, and the bus bar is connected to the electrode lead-out portions of the battery cells 11 of adjacent battery cells 11 or adjacent battery cell assemblies 1 for realizing electrical connection between the multiple battery cells 11 or the multiple battery cell assemblies 1. The bus bar can also be referred to as a connection tab.

[0118] Such as Figure 2As shown, the box assembly 2 is a housing structure for the battery cell 11. The box assembly 2 includes a box body 21 and a cover plate 22. The box body 21 is formed with an opening 211, and the cover plate 22 is disposed above the opening 211, thereby forming a closed first accommodation space 10 between the box body 21 and the cover plate 22. The first accommodation space 10 is used to accommodate the battery cell assembly 1. Here, "closed" means covering or closing, which can be sealed or non-sealed.

[0119] As an example, the box assembly 2 can be part of the chassis structure of a vehicle. For example, the cover plate 22 can be at least part of the vehicle floor, or the box body can be at least part of the vehicle cross beam and longitudinal beam.

[0120] In the embodiment of the present application, the box assembly 2 is generally in the shape of a cuboid. In some other embodiments, the box assembly 2 can also be in any other suitable shape such as a cube, a cylinder, etc. The embodiment of the present application does not specifically limit the shape of the box assembly 2, as long as it can accommodate the battery cell assembly 1.

[0121] In the embodiment of the present application, the electrical component 3 at least includes a high-voltage power distribution box (Power Distribution Unit, PDU) and a battery management system (Battery Management System, BMS). The high-voltage power distribution box is a control unit for distributing the energy of the battery device 100, and is used for high-voltage distribution, overload protection, short-circuit protection, etc. of the battery device 100. The battery management system is used to judge the operating state of the battery device 100 and adjust the charging and discharging states of the battery device.

[0122] The first plate member 4 is disposed on the side of the cover plate 22 facing away from the first accommodation space 10, and together with the cover plate 22 forms a second accommodation space 20 for accommodating the electrical component 3. The second accommodation space 20 is relatively independent of the first accommodation space 10. In the embodiment of the present application, the first plate member 4 is generally in the shape of a cuboid cover and is disposed above the cover plate 22, serving as an outer cover of the second accommodation space 20 to protect the electrical component 3 located in the second accommodation space 20. In some other embodiments, the first plate member 4 can also be in any other suitable shape as long as it can cover the electrical component 3.

[0123] Exemplarily, the first plate member 4 can be formed, for example, by stamping a plate-shaped member into an integral structural member.

[0124] Another exemplarily, the first plate member 4 can be formed by splicing a plurality of split plate-shaped members.

[0125] The embodiment of the present application does not specifically limit the forming process and material of the first plate member 4.

[0126] Since the battery cell assembly 1 is located in the first accommodation space 10 and the electrical component 3 is located in the second accommodation space 20 facing away from the first accommodation space 10, thereby enabling the electrical component 3 and the battery cell assembly 1 to be placed separately, such that the electrical component 3 does not occupy the space for accommodating the battery cell assembly 1, which is conducive to improving the regularity of the first accommodation space 10, making the first accommodation space 10 in the box body 21 only accommodate the battery cell assembly 1, enabling the arrangement of the battery cell assembly 1 located in the first accommodation space 10 to be more compact, and facilitating the improvement of the energy density of the battery cell assembly 1 without changing the volume of the first accommodation space 10.

[0127] Moreover, since the first accommodation space 10 and the second accommodation space 20 are relatively independent and the arrangement of the electrical component 3 is relatively flexible, therefore, the first plate member 4 can be correspondingly set in shape and size according to the electrical component 3 arranged as required, so that only a small part of the space above the cover plate 22 is occupied to form the second accommodation space 20 for accommodating the electrical component 3, without the need to occupy the entire space above the cover plate 22, which is more convenient for the installation of the battery device 100 and conducive to improving the space utilization rate of the battery device 100.

[0128] Exemplarily, as Figure 4 、 Figure 6 shown, the electrical component 3 can be integrally integrated at the end of the cover plate 22 along one side of its length direction. Thus, the first plate member 4 only needs to cover the end of the cover plate 22, and a second accommodation space 20 with a relatively large dimension in the first direction is formed at the end to accommodate the integrated electrical component 3. This can make the remaining area of the cover plate 22 except the area covered by the first plate member 4 not be occupied, that is, the dimension of the remaining area in the first direction does not need to be too large, thereby reducing the waste of space, being conducive to the miniaturization of the battery device 100, and being more conducive to the installation of the battery device 100. If the overall size of the battery device 100 remains unchanged, more dimensions can be reserved for the first accommodation space 10, which is conducive to improving the energy density of the battery device 100.

[0129] Certainly, those skilled in the art should understand that the embodiments of the present application do not specifically limit the position of the second accommodation space 20. Exemplarily, the second accommodation space 20 can also be located in the middle area of the cover plate 22, and the integrated position of the electrical component 3 and the position of the second accommodation space can be changed according to the actual installation position requirements of the battery device 100.

[0130] In the embodiment of the present application, a protruding portion 221 is formed by the cover plate 22 protruding towards the second accommodation space 20, and a groove 222 is formed by the surface of the protruding portion 221 facing the first accommodation space 10 being recessed. Thus, at least part of the structural members, bus bars, etc. for connecting the battery cell assemblies 1 in the first accommodation space 10 can be accommodated in the space of the groove 222 formed by the protruding portion 221, which is beneficial to reducing the occupation of the first accommodation space 10 by these structural members, bus bars, etc., further improving the regularity degree in the first accommodation space 10, and further improving the energy density of the battery cell assemblies 1 without changing the volume of the first accommodation space 10.

[0131] Exemplarily, the cover plate 22 can be stamped by a stamping process, and the protruding portion 221 and the groove 222 are respectively formed on both sides of the transplanted cover plate 22.

[0132] Those skilled in the art should understand that the embodiment of the present application does not specifically limit the number of the protruding portions 221, which can be only one, or two, three or more, and can be specifically set according to the arrangement of the battery cell assemblies 1 in the first accommodation space 10.

[0133] In addition, the embodiment of the present application does not specifically limit the extending direction of the protruding portion 221. The protruding portion 221 can extend along the length direction of the cover plate 22 or along the width direction of the cover plate 22.

[0134] In some embodiments of the present application, as Figures 4 to 7 shown, the first plate member 4 is covered on the cover plate 22 along the first direction. The electrical component 3 includes a first electrical element 31 and a second electrical element 32. The maximum dimension of the first electrical element 31 along the first direction is smaller than the maximum dimension of the second electrical element 32 along the first direction. Projecting along the first direction onto a projection plane perpendicular to the first direction, the projection of the first electrical element 31 and the projection of the protruding portion 221 at least partially overlap, and the projection of the second electrical element 32 and the projection of the protruding portion 221 are completely misaligned.

[0135] Since the cover plate 22 is formed with the protruding portion 221, when the first plate member 4 is covered on the cover plate 22, at least part of the protruding portion 221 can extend into the area covered by the first plate member 4, that is, into the second accommodation space 20, so that at least part of the protruding portion 221 can be accommodated by borrowing the second accommodation space 20, improving the space utilization rate of the battery device 100, and making the other areas above the cover plate 22 except the area covered by the first plate member 4 relatively flatter, which is more conducive to arranging some other components.

[0136] However, at least part of the protrusion 221 extending into the second accommodation space 20 will also form a height difference along the first direction in the second accommodation space 20, thus, the size of the first plate 4 along the first direction may increase, which is not conducive to reducing the size of the battery device 100.

[0137] The electrical component 3 is usually composed of a plurality of electrical components of different types, shapes and sizes. Therefore, in the embodiment of the present application, in the second accommodating space 20, the first electrical component 31 with a smaller size along the first direction can be at least partially arranged on the protrusion 221, and the second electrical component 32 with a larger size in the first direction can be arranged at a position outside the protrusion 221, that is, arranged at a non-protruding position of the cover plate 22, staggered with the protrusion 221, so that the overall height of the electrical component 3 in the second accommodating space 20 is relatively uniform, reducing the possibility of the electrical components located on the protrusion 221 occupying too much space along the first direction, thereby making it unnecessary to reserve too much space for the first plate 4 along the first direction, making the space utilization of the second area 202 more reasonable. In this way, while the electrical component 3 is fully arranged, the size of the first plate 4 along the first direction will not be too large, which is beneficial to the integration and miniaturization of the battery device 100.

[0138] In some embodiments of the present application, the first electrical element 31 is a resistor, and the second electrical element 32 is a fuse or a relay.

[0139] The resistor is usually smaller in size along the first direction, while the fuse or relay is larger in size along the first direction relative to the resistor. Therefore, the resistor can be at least partially arranged on the protrusion 221, while the fuse or relay can be staggered with the protrusion 221, so that the electrical components 3 such as the resistor, fuse, and relay can be more reasonably arranged in the second accommodating space 20, thereby improving the regularity of the second accommodating space 20 and improving the space utilization rate of the battery device 100.

[0140] Of course, those skilled in the art should understand that the first electrical component 31 does not only include a resistor, and the second electrical component 32 does not only include a fuse or a relay, and the first electrical component 31 and the second electrical component 32 may also include any other electrical components.

[0141] In some embodiments of the present application, Figure 8 As shown, the electrical component 3 includes a plurality of electrical components 33, at least two of the plurality of electrical components 33 have a first spacing space 30 in a second direction, the second direction is perpendicular to the first direction, and is projected along the first direction onto a projection plane perpendicular to the first direction, and the projection of the first spacing space 30 covers at least part of the projection of the protrusion 221.

[0142] Thus, without affecting the layout of the electrical components 33, the protruding portion 221 can reasonably utilize a part of the area within the second accommodation space 20, making the overall layout of the battery device 100 more compact and regular, which is beneficial to improving the space utilization rate of the battery device 100 and facilitating the miniaturization of the battery device 100.

[0143] Exemplarily, at least two of the plurality of electrical components 33 can be respectively located at positions inside and outside the protruding portion 221 within the second accommodation space 20.

[0144] Again exemplarily, at least two of the plurality of electrical components 33 can be respectively located on opposite sides of the protruding portion 221 along the second direction, such that the protruding portion 221 is located in the first interval space 30 between at least two electrical components 33.

[0145] Once again exemplarily, at least two of the plurality of electrical components 33 can be arranged at intervals along the second direction on the protruding portion 221.

[0146] In some embodiments of the present application, as Figure 9 shown, the electrical assembly 3 includes a plurality of electrical components 33, at least part of the plurality of electrical components 33 is arranged in the first region 201, and at least another part of the plurality of electrical components 33 is arranged in the second region 202. The first region 201 and the second region 202 have a second interval space 40 in the second direction. The second direction is perpendicular to the first direction. When projected along the first direction onto a projection plane perpendicular to the first direction, the projection of the second interval space 40 covers at least part of the projection of the protruding portion 221.

[0147] Thus, without affecting the layout of the electrical components 33, the protruding portion 221 can reasonably utilize a part of the area within the second accommodation space 20, making the overall layout of the battery device 100 more compact and regular, which is beneficial to improving the space utilization rate of the battery device 100 and facilitating the miniaturization of the battery device 100.

[0148] At least part of the plurality of electrical components 33 can be divided into two parts. Exemplarily, one part of the electrical components 33 can be located on the protruding portion 221 within the second accommodation space 20, and the other part of the electrical components 33 is located at a position outside the protruding portion 221 within the second accommodation space 20.

[0149] Again exemplarily, the two parts of the electrical components 33 can be respectively located on opposite sides of the protruding portion 221 along the second direction, such that the protruding portion 221 is located in the second interval space 40 between the two parts of the electrical components 33.

[0150] Once again exemplarily, the two parts of the electrical components 33 can be arranged at intervals along the second direction on the protruding portion 221.

[0151] Those skilled in the art should understand that each part of the electrical component 33 generally includes a plurality of electrical components 33, and at least two of the plurality of electrical components 33 have a first spacing space 30 in the second direction.

[0152] In some embodiments of the present application, as Figure 5 , Figure 7 shown, the battery device 100 further includes an electrical connector 5, and the electrical connector 5 is used to connect the electrical components 33 located in the first region 201 and the second region 202 respectively, and at least part of the electrical connector 5 is located in the second spacing space 40.

[0153] The electrical connector 5 is a component that can realize the electrical connection of the electrical components 33 and is usually made of a conductive material. Exemplarily, the electrical connector includes but is not limited to a copper bar, a wire, etc.

[0154] The electrical connector 5 in the embodiment of the present application can be at least partially located in the second spacing space 40, so that the electrical connector 5 for connecting the electrical components 33 in the two regions can make full use of at least part of the region of the second spacing space 40, making the layout of the overall electrical components 33 and the electrical connector 5 more reasonable, thereby reducing the waste of space, without occupying the remaining positions in the second accommodation space 20 to arrange the electrical connector 5, improving the space utilization rate in the second accommodation space 20, and further being able to appropriately reduce the size of the second accommodation space 20, which is beneficial to the miniaturization of the battery device 100.

[0155] In some embodiments, a limiting portion similar to a groove can be formed in the second spacing space 40, so that the electrical connector 5 can be at least partially located in the limiting portion, playing a certain limiting role on the electrical connector 5, and further reducing the possibility of poor contact between the electrical components 33 or safety hazards caused by the movement of the electrical connector 5, improving the electrical reliability in the second accommodation space 20.

[0156] Moreover, performing a certain limit on the electrical connector 5 can also reduce the area occupied by the electrical connector 5 in the second accommodation space 20, further improving the regularity in the second accommodation space 20, being beneficial to reducing the size of the second accommodation space 20, and thus being beneficial to reducing the overall size of the battery device 100.

[0157] In some embodiments of the present application, as Figure 5 , Figure 8 shown, the battery device 100 further includes a carrier 6, and the carrier 6 is used to carry the electrical components 33 located in the first region 201. The carrier 6 protrudes in a direction away from the first accommodation space 10 to form an accommodation portion 61 on the surface facing the first accommodation space 10, and at least part of the protruding portion 221 is located in the accommodation portion 61.

[0158] The carrier 6 is generally plate-shaped and is used to carry at least part of the electrical components 33. Integrating the electrical components 33 in the first region 201 on the carrier 6 can improve the degree of integration of the electrical components 33, thereby facilitating the saving of the space occupied by the electrical components 33.

[0159] Of course, those skilled in the art should understand that the electrical components 33 are not necessarily integrated on the carrier 6. In some embodiments, the battery device 100 may also not include the carrier 6, and the electrical components 33 may be directly disposed on the cover plate 22.

[0160] Moreover, the carrier 6 is formed with a receiving portion 61, and the shape of the receiving portion 61 is generally adapted to the shape of the protruding portion 221. Through the cooperation of the protruding portion 221 and the receiving portion 61, the carrier 6 can be sleeved above the protruding portion 221, so that the spacing distance between the protruding portion 221 and the carrier 6 is reduced, and further the carrier 6 does not occupy too much space in the height direction (the first direction), which is beneficial to saving the size of the second receiving space 20 in the first direction and is more conducive to the miniaturization and integration of the battery device 100.

[0161] In some embodiments of the present application, as Figure 8 shown, the battery device 100 further includes a carrier 6. The carrier 6 is used to carry at least part of the electrical components 3. The carrier 6 protrudes away from the first receiving space 10 to form a receiving portion 61 on the surface facing the first receiving space 10, and at least part of the protruding portion 221 is located in the receiving portion 61.

[0162] Thereby, at least part of the electrical components 3 can be integrated on the carrier 6, so as to improve the degree of integration of the electrical components 3 and is more beneficial to saving the space occupied by the electrical components 3.

[0163] Moreover, the carrier 6 is formed with a receiving portion 61. Through the cooperation of the protruding portion 221 and the receiving portion 61, the spacing distance between the protruding portion 221 and the carrier 6 is reduced, so that the carrier 6 does not occupy too much space in the height direction (the first direction), which is beneficial to saving the size of the second receiving space 20 in the first direction and is more conducive to the miniaturization and integration of the battery device 100.

[0164] Those skilled in the art should understand that the carrier 6 for carrying at least part of the electrical components 3 may be that all the electrical components 3 are integrated on the carrier 6, or only part of the electrical components 3 are integrated on the carrier 6, and the other part of the electrical components 3 are directly disposed on the cover plate 22.

[0165] In some embodiments of the present application, as Figures 4 to 7As shown, the first plate member 4 includes a plurality of side wall portions 41 connected to the cover plate 22. A third spacing space 50 is provided between the electrical component 3 and at least one of the plurality of side wall portions 41. When projected along the first direction onto a projection plane perpendicular to the first direction, the projection of the third spacing space 50 covers at least part of the projection of the protruding portion 221.

[0166] The side wall portion 41 refers to the wall surface of the first plate member 4 extending along the first direction. In the embodiment of the present application, the first plate member 4 includes four side wall portions 41. In some other embodiments, the first plate member 4 may further include a greater or smaller number of side wall portions 41, which can be specifically set according to the shape of the area to be covered.

[0167] In addition, when projected along the first direction onto a projection plane perpendicular to the first direction, the projection of the third spacing space 50 covers at least part of the projection of the protruding portion 221, indicating that at least part of the first plate member 4 is disposed on the protruding portion 221. In this way, the protruding portion 221 can partially extend into the area within the second accommodation space 20 formed by the first plate member 4 and the cover plate 22, improving the space utilization rate and being conducive to reducing the size of the overall battery device 100 along the first direction.

[0168] In some embodiments of the present application, as Figure 4 、 Figure 6 shown, when projected along the first direction onto a projection plane perpendicular to the first direction, at least part of the projection of the protruding portion 221 is located outside the projection of the first plate member 4.

[0169] Thus, the protruding portion 221 can partially borrow the area of the second accommodation space 20 formed between the first plate member 4 and the cover plate 22. Without affecting the realization of the functions of each electrical component 3, a certain amount of redundant space is saved, which is conducive to improving the overall space utilization rate of the battery device 100 and is more conducive to the miniaturization and integration of the battery device 100. Or when the overall volume of the battery device 100 remains unchanged, more area can be reserved for the first accommodation space 10, thereby being conducive to improving the energy density of the battery device 100.

[0170] In some embodiments of the present application, as Figures 4 to 7 shown, the first plate member 4 is provided with an avoidance groove 42, and at least part of the protruding portion 221 passes through the avoidance groove 42.

[0171] Since the protruding portion 221 has a certain height dimension in the first direction, when the first plate member 4 is covered on the position of the cover plate 22 where the protruding portion 221 is formed, the overall height will be raised. That is, the lower edge of the first plate member 4 cannot contact the cover plate 22, which is not conducive to the placement stability of the first plate member 4. Moreover, a certain gap will be formed below the first plate member 4, and external dust, foreign objects, etc. may enter the interior of the second accommodation space 20 from this gap, thus causing some adverse effects on the internal electrical components 3.

[0172] Therefore, in the embodiment of the present application, the first plate member 4 is further provided with an avoidance groove 42. The shape and size of the avoidance groove 42 are generally adapted to the shape and size of the protruding portion 221 to be contacted, so that the avoidance groove 42 at the lower edge of the first plate member 4 cooperates with the protruding portion 221, and the remaining lower edge portion except the avoidance groove 42 directly contacts the cover plate 22. Thus, the first plate member 4 can be reasonably and fully arranged above the cover plate 22 having the protruding portion 221, and the second accommodation space 20 can be relatively sealed, and external dust, foreign objects, etc. are not easily introduced into the interior of the second accommodation space 20, playing a good protective role for the electrical components 3 in the second accommodation space 20.

[0173] Exemplarily, the avoidance groove 42 can be formed by protruding the lower edge of the first plate member 4 toward the second accommodation space 20. The embodiment of the present application does not specifically limit the shape and size of the avoidance groove 42, and can be specifically limited according to the shape and size of the protruding portion 221 that needs to be avoided actually.

[0174] In some embodiments, a sealing member can be provided at the lower edge of the first plate member 4 and in the avoidance groove 42, so that the first plate member 4 and the cover plate 22 form a relatively sealed second accommodation space 20, playing a better protective role for the internal electrical components 3.

[0175] In some embodiments of the present application, as Figure 8 , Figure 9 shown, the groove 222 forms an installation space 2221, and the opening of the groove 222 faces the first accommodation space 10 to communicate the first accommodation space 10 with the installation space 2221. The battery device 100 includes a first component 7 located in the installation space 2221, and at least part of the first component 7 is located in the groove 222.

[0176] Thus, at least part of the structural members, busbars, etc. for connecting the battery cells 11 in the battery cell assembly 1 can be accommodated in the installation space 2221 of the groove 222, which is beneficial to reducing the occupation of these structural members, busbars, etc. on the first accommodation space 10, improving the regularity degree in the first accommodation space 10, and further improving the energy density of the battery device 100 without changing the volume of the first accommodation space 10.

[0177] In some embodiments of the present application, the battery device 100 includes a bus bar 8 and a sampling component 9. The battery cell assembly 1 is provided with an electrode lead-out portion 12. The bus bar is connected to the electrode lead-out portion 12. The sampling component is used to connect to the battery cell assembly 1 to obtain information of the battery cell assembly 1. The first component includes at least one of the electrode lead-out portion 12, the bus bar 8, and the sampling component 9.

[0178] The bus bar 8 is used to electrically connect multiple battery cells 11 in the battery cell assembly 1, or electrically connect multiple battery cell assemblies 1, so as to realize series, parallel, or series-parallel connection between the battery cells 11 or between the battery cell assemblies 1.

[0179] The sampling component 9 is used to be electrically connected to the battery cell assembly 1 to sample the battery cell assembly 1. For example, information such as current, voltage, and temperature of the battery cell assembly 1 can be sampled and obtained. The sampling component 9 includes, but is not limited to, a flexible circuit board.

[0180] The battery cell assembly 1 is provided with an electrode lead-out portion 12 for outputting current from inside the battery cell assembly 1 or inputting current into the battery cell assembly 1. The electrode lead-out portion 12 can be, for example, a terminal post.

[0181] The electrode lead-out portion 12 is usually provided protruding from the surface of the battery cell assembly 1, and the bus bar and the sampling component are usually electrically connected to the electrode lead-out portion 12 of the battery cell assembly 1. Therefore, these components will also occupy a certain space in the first accommodation space 10, resulting in an increase in the size of the box body 21 in the first direction.

[0182] In the embodiment of the present application, since a protruding portion 221 is formed on the cover plate 22, and a groove 222 is formed by the surface of the protruding portion 221 facing the first accommodation space 10 being recessed. Thus, at least part of the above-mentioned components can be accommodated in the installation space 2221 of the groove 222, so as to reduce the occupation of the space for placing the battery cell assembly 1 by one or more of the electrode lead-out portion 12, the bus bar, and the sampling component, which is beneficial to making the space for placing the battery cell assembly 1 in the box body 21 more regular and making the structure of the battery device 100 more compact.

[0183] In some embodiments of the present application, as Figure 10 , Figure 11 shown, the first component 7 includes the electrode lead-out portion 12, and at least part of the electrode lead-out portion 12 is located in the groove 222.

[0184] The electrode lead-out portion 12 is at least partially located within the groove 222, such that the main body portions of the remaining battery cell components 1 in the battery cell assembly 1, excluding the electrode lead-out portion 12, can be disposed closer to the inner wall of the cover plate 22, thereby improving the space utilization rate of the first accommodation space 10. Without changing the volume of the first accommodation space 10, the volume of the main body portion of the battery cell assembly 1 can be appropriately increased, which is conducive to improving the energy density of the battery device 100.

[0185] In some embodiments of the present application, as Figure 8 , Figure 9 , Figure 10 shown, the battery cell assembly 1 includes a first battery cell assembly 1a. The first battery cell assembly 1a includes a first electrode lead-out portion 121 and a second electrode lead-out portion 122. The groove 222 includes a first groove 222a. At least a portion of both the first electrode lead-out portion 121 and the second electrode lead-out portion 122 is located within the first groove 222a.

[0186] Those skilled in the art should understand that the number of the first battery cell assemblies 1a can be multiple, and the number of the first grooves 222a can also be multiple. The positions of the first grooves 222a can correspond to the positions of the first battery cell assemblies 1a, and each of the first battery cell assemblies 1a can be respectively located within each of the first grooves 222a. The embodiments of the present application do not specifically limit the numbers of the first battery cell assemblies 1a and the first grooves 222a.

[0187] The number of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 included in the first battery cell assembly 1a can also be multiple, and each battery cell 11 in the first battery cell assembly 1a includes an electrode lead-out portion 12.

[0188] Since at least a portion of both the first electrode lead-out portion 121 and the second electrode lead-out portion 122 of the same first battery cell assembly 1a is located within the same first groove 222a, the space utilization rate of the first groove 222a can be improved, the overall number of the grooves 222 can be reduced, which is beneficial to reducing the processing difficulty of the cover plate 22, thereby reducing the production cost. Moreover, it is conducive to the arrangement of the sampling assembly 9, such that the sampling assembly 9 can more easily collect the information of both the first electrode lead-out portion 121 and the second electrode lead-out portion 122 simultaneously.

[0189] In some embodiments of the present application, as Figure 10 shown, the groove length of the first groove 222a is greater than the groove width, and the distance between the farthest points of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 along the groove width direction of the first groove 222a is less than half of the maximum dimension of the first battery cell assembly 1 along the groove width direction of the first groove 222a.

[0190] The distance between the farthest points of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 along the groove width direction of the first groove 222a means that when projected along the first direction onto a projection plane perpendicular to the first direction, the distance between the two points that are farthest apart between the outer contours of the projections of the first electrode lead-out portion 121 and the outer contour of the projection of the second electrode lead-out portion 122.

[0191] Wherein, the first direction, the groove width direction of the first groove 222a, and the groove length direction of the first groove 222a are perpendicular to each other.

[0192] Thereby, the arrangement of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 on the first battery cell assembly 1 is made more compact, which is beneficial to reducing the size of the protruding portion 221 and the outer contour size of the overall battery cell assembly 1, and is conducive to the miniaturization and integration of the battery device 100.

[0193] Moreover, the centralized arrangement of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 enables a larger flat space to be reserved at the remaining positions of the battery cell assembly 1 except for the electrode lead-out portion 12, which is thus beneficial to the arrangement of other components of the battery cell assembly 1 and improves the compactness of the battery device 100.

[0194] In some embodiments of the present application, as Figure 11 shown, the sampling assembly 9 includes a first sampling assembly 91. The first sampling assembly 91 is electrically connected to the first battery cell assembly 1a, and at least a part of the first sampling assembly 91 is located in the first groove 222a.

[0195] Thereby, the space occupied by the sampling assembly 9 in the first accommodation space 10 can be reduced, and the first sampling assembly 91 can simultaneously sample the first electrode lead-out portion 121 and the second electrode lead-out portion 122 located in the first groove 222a, which is more convenient for the sampling of the first sampling assembly 91 and does not require separate sampling of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 separately, which is beneficial to reducing the number of sampling assemblies 9.

[0196] Those skilled in the art should understand that when the number of the first grooves 222a is multiple, the number of the first sampling assemblies 91 can also be multiple, and one first sampling assembly 91 can be respectively arranged in each of the first grooves 222a, so as to sample the first electrode lead-out portion 121 and the second electrode lead-out portion 122 in each of the first grooves 222a.

[0197] Of course, in some other embodiments, multiple first sampling assemblies 91 can also be arranged in one first groove 222a. The embodiments of the present application do not specifically limit the number of the first sampling assemblies 91, as long as the first battery cell assembly 1a can be sampled.

[0198] In some embodiments of the present application, the groove length of the first groove 222a is greater than the groove width. When projected onto a projection plane perpendicular to the groove length direction of the first groove 222a along the groove length direction of the first groove 222a, at least a part of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 overlap in projection.

[0199] That is to say, the first electrode lead-out portion 121 and the second electrode lead-out portion 122 are generally on the same horizontal line along the groove length direction of the first groove 222a, so that the distance between the outer edges of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 from the edge of the first groove 222a can be reduced along the groove width direction. Furthermore, it is beneficial to reduce the size of the first groove 222a along the groove width direction and reduce the size of the battery cell assembly 1 along the groove width direction, thereby improving the compactness of the battery device 100.

[0200] In some embodiments of the present application, as Figure 10 shown, the groove length of the first groove 222a is greater than the groove width. The first battery cell assembly 1a includes a first edge 10a and a second edge 20a that are oppositely arranged along the groove width direction of the first groove 222a. The maximum distance between the first electrode lead-out portion 121 and the first edge 10a is less than the maximum distance from the second edge 20a, and the maximum distance between the second electrode lead-out portion 122 and the first edge 10a is less than the maximum distance from the second edge 20a.

[0201] That is to say, in the embodiments of the present application, both the first electrode lead-out portion 121 and the second electrode lead-out portion 122 are arranged close to the first edge 10a of the first battery cell assembly 1a. When the overall size of the battery cell assembly 1 remains unchanged, a relatively large flat space can be formed on the side of the battery cell assembly 1 close to the second edge, thereby reserving a larger space for arranging the sampling assembly 9, the bus bar 8, etc., and improving the layout flexibility.

[0202] In some embodiments of the present application, as Figure 10 、 Figure 11 shown, the first battery cell assembly 1a includes a first edge 10a and a second edge 20a that are oppositely arranged along the groove width direction of the first groove 222a. The sampling assembly 9 includes a first sampling assembly 91. The first sampling assembly 91 is electrically connected to the first battery cell assembly 1a, and the first sampling assembly 91 is located between the one of the first electrode lead-out portion 121 and the second electrode lead-out portion 122 that is closer to the second edge 20a and the second edge 20a.

[0203] Thus, the first sampling component 91 can sample the first electrode lead-out portion 121 and the second electrode lead-out portion 122 of the first battery cell component 1a simultaneously, and the first sampling component 91 can be located in a relatively large flat space on the side of the first battery cell component 1a close to the second edge 20a, making full use of this flat area, which is beneficial to improving the space utilization rate of the battery device 100.

[0204] In some embodiments of the present application, as Figure 11 shown, the battery device 100 further includes a first bus bar 81. The first bus bar 81 is used to electrically connect the first electrode lead-out portion 121 and the electrode lead-out portions 12 on other battery cell components 1. At least part of the first bus bar 81 is located in the first groove 222a.

[0205] Thus, the first bus bar 81 does not occupy too much area in the accommodation space of the battery cell component 1, further improving the regularity in the first accommodation space 10. Without changing the volume of the first accommodation space 10, it is beneficial to improve the energy density of the battery device 100.

[0206] The second aspect of the present application provides an electrical device. The electrical device includes the battery device 100 described in the first aspect of the present application. The battery device 100 is used to provide electrical energy for the electrical device.

[0207] Since the electrical device adopts the battery device 100 with a compact structure and high space utilization rate as described above, thus, without affecting the energy density of the battery device 100, the battery device 100 occupies less space in the electrical device, which is beneficial to the arrangement of other components in the electrical device and improves the space utilization rate of the electrical device.

[0208] In some embodiments of the present application, as Figure 3 shown, the electrical device is a vehicle 1000. The vehicle 1000 further includes a seat 1001. At least part of the second accommodation space 20 is located below the seat 1001.

[0209] The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. As Figure 1 shown, the battery device 100 is arranged inside the vehicle 1000. The battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300. For example, it is used for the working power consumption requirements during the start, navigation and driving of the vehicle 1000.

[0210] In some embodiments of the present application, the battery device 100 can not only serve as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, providing driving power for the vehicle 1000 instead of or partially replacing fuel or natural gas.

[0211] In the embodiments of the present application, the electrical component 3 is integrated in the second accommodation space 20, which can save the space occupied by the electrical component 3, so that the second accommodation space 20 accommodating the electrical component 3 can be at least partially located under the seat 1001 of the vehicle 1000, making full use of the space under the seat 1001 and improving the space utilization rate.

[0212] A specific embodiment of the present application will be described below.

[0213] As a specific example, the present application provides a structure of a battery pack (battery device 100) with a convex hull (protrusion 221). The convex hull structure includes, but is not limited to, a transverse distribution or a longitudinal distribution. In the convex hull structure of the battery pack upper cover (cover plate 22), the pole columns (electrode lead-out parts) of the battery and structures such as electrical connection (busbar 8) and sampling (sampling component 9) above the pole columns are accommodated. There is a high-voltage box (second accommodation space 20) structure above the battery pack. The high-voltage box structure is located on the second layer of the battery pack and is close to one end of the battery pack. The convex hull accommodating the pole columns and related electrical connection structures has a part buried in the high-voltage box. By optimizing the internal space of the high-voltage box, the influence of the upper cover convex hull on the outer shape and Z-direction (first direction) dimension of the battery pack is reduced, and the volume utilization rate of the battery pack is improved.

[0214] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of their features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising at least one battery cell; A box assembly, comprising a box and a cover plate, wherein the box has an opening, the cover plate covers the opening to form a first accommodation space together with the box, and the battery monomer assembly is located in the first accommodation space; Electrical components; A first plate member is disposed on a side of the cover plate away from the first accommodation space, the first plate member is covered on the cover plate to form a second accommodation space, and the electrical component is located in the second accommodation space; The cover plate protrudes toward the second accommodation space to form a protruding portion, and a surface of the protruding portion facing the first accommodation space is recessed to form a groove.

2. The battery device according to claim 1, characterized in that The first plate is covered on the cover plate along a first direction, the electrical component includes a first electrical component and a second electrical component, the maximum size of the first electrical component along the first direction is smaller than the maximum size of the second electrical component along the first direction, When projected along the first direction onto a projection plane perpendicular to the first direction, the projection of the first electrical element at least partially overlaps with the projection of the protrusion, and the projection of the second electrical element is completely misaligned with the protrusion.

3. The battery device according to claim 2, characterized in that, The first electrical element is a resistor, and the second electrical element is a fuse or a relay.

4. The battery device according to claim 1, wherein, The electrical component includes a plurality of electrical components, at least two of the plurality of electrical components have a first spacing space in a second direction, the second direction is perpendicular to the first direction, and a projection along the first direction is projected onto a projection plane perpendicular to the first direction, and a projection of the first spacing space covers at least a portion of a projection of the protrusion.

5. The battery device according to claim 1, characterized in that, The electrical component includes a plurality of electrical components, at least some of the plurality of electrical components are arranged in a first area, and at least another part of the plurality of electrical components are arranged in a second area, the first area and the second area have a second spacing space in a second direction, the second direction is perpendicular to the first direction, and a projection along the first direction onto a projection plane perpendicular to the first direction, the projection of the second spacing space covers at least part of the projection of the protrusion.

6. The battery device according to claim 5, characterized in that, The battery device further includes an electrical connector for connecting electrical components located in the first area and the second area, respectively, and at least a portion of the electrical connector is located in the second compartment.

7. The battery device according to claim 5, wherein The battery device also includes a carrier, which is used to support the electrical components located in the first area. The carrier protrudes in a direction away from the first accommodation space to form an accommodation portion on a surface facing the first accommodation space, and at least a portion of the protruding portion is located in the accommodation portion.

8. The battery device according to claim 1, characterized in that The battery device also includes a carrier, which is used to support at least part of the electrical component. The carrier protrudes in a direction away from the first accommodating space to form a accommodating portion on a surface facing the first accommodating space, and at least part of the protruding portion is located in the accommodating portion.

9. The battery device according to claim 1, characterized in that, The first plate member includes a plurality of side wall portions connected to the cover plate, and a third spaced-apart space is provided between the electrical component and at least one of the plurality of side wall portions. Projecting along the first direction onto a projection plane perpendicular to the first direction, the projection of the third spaced-apart space covers at least a part of the projection of the protruding portion.

10. The battery device according to claim 1, characterized in that, Projecting along the first direction onto a projection plane perpendicular to the first direction, at least a part of the projection of the protruding portion is located outside the projection of the first plate member.

11. The battery device according to claim 10, characterized in that, The first plate member is provided with an avoidance groove, and at least a part of the protruding portion passes through the avoidance groove.

12. The battery device according to any one of claims 1-11, characterized in that, The groove forms an installation space, and the opening of the groove faces the first accommodation space so that the first accommodation space communicates with the installation space; The battery device includes a first component located in the installation space, and at least a part of the first component is located in the groove.

13. The battery device according to claim 12, characterized in that, The battery device includes a bus bar and a sampling component. The battery cell assembly is provided with an electrode lead-out portion. The bus bar is connected to the electrode lead-out portion. The sampling component is used to connect to the battery cell assembly to obtain information of the battery cell assembly. The first component includes at least one of the electrode lead-out portion, the bus bar, and the sampling component.

14. The battery device according to claim 13, wherein The first component includes the electrode lead-out portion, and at least a part of the electrode lead-out portion is located in the groove.

15. The battery device according to claim 14, characterized in that, The battery cell assembly includes a first battery cell assembly. The first battery cell assembly includes a first electrode lead-out portion and a second electrode lead-out portion. The groove includes a first groove, and at least a part of the first electrode lead-out portion and the second electrode lead-out portion are located in the first groove.

16. The battery device according to claim 15, characterized in that, The groove length of the first groove is greater than the groove width. The distance between the farthest points of the first electrode lead-out portion and the second electrode lead-out portion along the groove width direction of the first groove is less than half of the maximum dimension of the first battery cell assembly along the groove width direction of the first groove.

17. The battery device according to claim 15, characterized in that, The sampling component includes a first sampling component. The first sampling component is electrically connected to the first battery cell assembly, and at least a part of the first sampling component is located in the first groove.

18. The battery device according to claim 15, characterized in that, The groove length of the first groove is greater than the groove width. Projecting along the groove length direction of the first groove onto a projection plane perpendicular to the groove length direction of the first groove, at least a part of the projections of the first electrode lead-out portion and the second electrode lead-out portion overlap.

19. The battery device according to claim 15, characterized in that, The groove length of the first groove is greater than the groove width. The first battery cell assembly includes a first edge and a second edge that are oppositely arranged along the groove width direction of the first groove. The maximum distance between the first electrode lead-out portion and the first edge is less than the maximum distance from the second edge, and the maximum distance between the second electrode lead-out portion and the first edge is less than the maximum distance from the second edge.

20. The battery device according to claim 15, characterized in that, The first battery cell assembly includes a first edge and a second edge that are oppositely arranged along the groove width direction of the first groove. The sampling component includes a first sampling component. The first sampling component is electrically connected to the first battery cell assembly. The first sampling component is located between the one of the first electrode lead-out portion and the second electrode lead-out portion that is closer to the second edge and the second edge.

21. The battery device according to claim 15, characterized in that, The battery device further includes a first busbar, which is used to electrically connect the first electrode lead-out portion and the electrode lead-out portions on other battery cell assemblies, and at least a part of the first busbar is located in the first groove.

22. An electrical device, characterized in that, The electrical device includes the battery device according to any one of claims 1-21, and the battery device is used to supply electrical energy to the electrical device.

23. The electrical device according to claim 22, characterized in that, The electrical device is a vehicle, and the vehicle further includes a seat, and at least a part of the second accommodation space is located below the seat.

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