Battery device and electric device

Abstract

The application relates to a battery device and a power consumption device. The battery device comprises a battery cell, a bottom plate, two first side walls arranged on the bottom plate in a first direction and two second side walls arranged on the bottom plate in a second direction; the bottom plate, the two first side walls and the two second side walls form a containing cavity, the battery cell is placed in the containing cavity, the first direction and the second direction intersect; the first side wall has two or more single-layer walls arranged in the first direction, at least part of the second side wall is a single-layer wall in the second direction; the end of the first side wall and the second side wall away from the bottom plate is provided with a locking surface in a third direction, the third direction is perpendicular to the plane formed by the first direction and the second direction, wherein the locking surface of the second side wall extends towards the containing cavity in the second direction, and the end of the locking surface of the second side wall towards the containing cavity in the second direction has a third wall extending towards the bottom plate. The battery device can meet the requirements of light weight and safety protection.

Description

Technical Field

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

[0002] The installation and fixation of individual battery cells are usually achieved through battery enclosures. While double-walled battery enclosures offer excellent mechanical properties and safety protection, their greater weight leads to reduced system assembly efficiency. Single-walled battery enclosures, on the other hand, can meet the requirements for lightweight design, but their insufficient structural strength makes them difficult to meet the mechanical requirements under complex operating conditions.

[0003] Therefore, it is necessary to provide a battery device and an electrical device that can meet the requirements of both lightweight design and safety protection. Utility Model Content

[0004] Based on this, this application provides a battery device and an electrical device that can meet the requirements of both lightweight design and safety protection.

[0005] In a first aspect, this application provides a battery device, which includes a battery cell, a base plate, two first sidewalls spaced apart on the base plate along a first direction, and two second sidewalls spaced apart on the base plate along a second direction; the base plate, the two first sidewalls, and the two second sidewalls form a receiving cavity, in which the battery cell is placed, and the first and second directions intersect; the first sidewalls have two or more single-layer walls spaced apart along the first direction, and at least a portion of the second sidewalls are single-layer walls along the second direction; the first and second sidewalls are respectively provided with locking surfaces at their ends away from the base plate along a third direction, the third direction being perpendicular to the plane formed by the first and second directions, wherein the locking surfaces of the second sidewalls extend toward the receiving cavity along the second direction, and the end of the locking surfaces of the second sidewalls toward the receiving cavity along the second direction has a third wall extending toward the base plate.

[0006] In the technical solution provided by the embodiments of this application, by setting the first sidewall as having two or more single-layer walls spaced apart along the first direction, and setting at least a portion of the second sidewall as a single-layer wall along the second direction, the requirements of lightweighting and safety protection can be balanced. Furthermore, by setting a third wall, the rigidity of the locking surface can be enhanced while maintaining a compact external profile and without significantly increasing the overall weight, ensuring minimal deformation of the locking surface during the locking process, thereby guaranteeing the reliability of the sealing connection.

[0007] In some embodiments, the locking surface of the second sidewall is provided with a protruding structure on the side facing the base plate in a third direction, and the protruding structure is connected to the second sidewall and the third wall.

[0008] In the technical solution provided in this application embodiment, by providing a protruding structure on the side of the locking surface of the second sidewall facing the bottom plate in a third direction, and the protruding structure being connected to the second sidewall and the third wall, the axial force applied by the bolt / screw to the locking surface can be transmitted to the second sidewall and the third wall, thereby strengthening the strength of the locking surface.

[0009] In some embodiments, the protruding structure includes an annular rib surrounding the outside of the connecting through hole on the locking surface.

[0010] In the technical solution provided in this application embodiment, the annular rib is connected between the second side wall and the third wall to strengthen the strength of the locking surface, while increasing the strength of the locking area around the connecting through hole, preventing the locking surface from being concave and deformed during locking, and dispersing the stress along the circumferential direction to avoid stress concentration.

[0011] In some embodiments, the battery device further includes a fourth wall disposed opposite to the locking surface of the second sidewall in a third direction toward the side facing the base plate, the fourth wall being connected to the second sidewall and the third wall.

[0012] In the technical solution provided in this application embodiment, by setting a fourth wall, the rigidity can be improved by local reinforcement and the reliability of the sealing connection can be guaranteed while ensuring a compact external contour and without significantly increasing the overall weight.

[0013] In some embodiments, the second sidewall includes a first region and a second region sequentially distributed along a third direction, the second region being closer to the base plate than the first region; the battery device also includes a fifth wall disposed on the base plate and disposed opposite to the side of the second region facing the receiving cavity along a second direction, and a sixth wall connecting the second region and the fifth wall.

[0014] In the technical solution provided in this application embodiment, by setting a fifth wall and a sixth wall, the local strength of the connection position between the second region and the base plate can be enhanced while ensuring a compact external outline and without significantly increasing the overall weight, thus avoiding structural failure caused by excessive local stress.

[0015] In some embodiments, the battery device further includes electrical components; at least a portion of the electrical components are located in a receiving space between the locking surface of the third-party upward second sidewall and the sixth wall.

[0016] In the technical solution provided by the embodiments of this application, by placing at least a portion of the electrical components in the accommodating space between the locking surface of the second sidewall and the sixth wall in the third direction, the redundant space of the structure can be fully utilized, the battery pack can be made compact and lightweight, and the space utilization rate in the first direction can be improved; and the electrical components are located in the accommodating space, which can be protected in the event of collision or other working conditions.

[0017] In some embodiments, the electrical components include at least one of a high-voltage box, a battery management system, and a copper bar.

[0018] In the technical solutions provided in this application, when the electrical component is a high-voltage box, it is located in the housing space, which can shorten the high-voltage power distribution circuit and improve the high-voltage safety isolation; when the electrical component is a battery management system, it is located in the housing space, which can shorten the sampling harness length and optimize electromagnetic compatibility; when the electrical component is a copper bar, it is located in the housing space, which can reduce the connection resistance and enhance the high-voltage connection reliability; when at least two of the high-voltage box, battery management system and copper bar are integrated in the housing space, a synergistic effect is formed between the electrical components, which further simplifies the high-voltage power distribution and control circuit and improves the overall integration and reliability of the battery device.

[0019] In some embodiments, the accommodating cavity further includes a first beam and a second beam spaced apart along a second direction, both of which are connected to two first sidewalls; an electrical component is disposed between the first beam and one of the two second sidewalls, and the second beam is connected to the other of the two second sidewalls by a reinforcing rib.

[0020] In the technical solution provided in this application embodiment, the first sidewall has two or more single-layer walls spaced apart along a first direction. The first beam and the second beam are both connected to the two first sidewalls. The first sidewalls can be used to increase the force resisting the deformation of the first beam and the second beam against the battery cell. By setting an electrical component between the first beam and one of the two second sidewalls, the functional partitioning of the electrical component and the battery cell is realized, avoiding the electrical component being squeezed by the battery cell when the structure is under stress. Furthermore, the electrical component and the battery cell are physically isolated, improving the overall safety of the battery device and facilitating subsequent inspection and maintenance. By connecting the second beam to the other of the two second sidewalls through a reinforcing rib, the structural strength of the second sidewall is further improved on the basis of lightweight design.

[0021] In some embodiments, the accommodating cavity further includes a third beam connected to two first sidewalls and / or a bottom plate, and a mounting element is provided at the end of the third beam away from the bottom plate in a third direction.

[0022] In the technical solution provided in this application embodiment, the third beam is connected to the two first side walls and / or the bottom plate, so that the third beam and the two first side walls and / or the bottom plate form a stable spatial force system, which can efficiently transfer the load to the main body of the battery box and avoid local stress concentration. The end of the third beam away from the bottom plate along the third direction is provided with a mounting component, which is located on the upper part of the battery box, which is convenient for assembly and maintenance. Moreover, the third beam, as a local reinforcement structure, can provide a high-strength mounting component without significantly increasing the overall weight, thereby improving the reliability of the mounting and the overall safety of the battery device.

[0023] Secondly, this application provides an electrical device, which includes a battery device as described above, the battery device serving as a power source for the electrical device and / or an energy storage unit for the electrical device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 These are schematic diagrams of the vehicle structure shown in some embodiments of this specification;

[0026] Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this specification;

[0027] Figure 3 This is a structural schematic diagram of the battery box according to some embodiments shown in this specification;

[0028] Figure 4 This is a top view of the battery housing according to some embodiments shown in this specification;

[0029] Figure 5 yes Figure 4 Along A of the middle battery box A schematic diagram of the cross-sectional structure along direction A;

[0030] Figure 6A yes Figure 5 Schematic diagram of the structure of region M of the battery box;

[0031] Figure 6B yes Figure 5 Another structural diagram of region M of the battery box;

[0032] Figure 6C yes Figure 5 Another structural diagram of region M of the battery box;

[0033] Figure 7 This is a top view of the battery housing according to other embodiments shown in this specification;

[0034] Figure 8 yes Figure 7 Along B of the middle battery box Schematic diagram of the cross-sectional structure along direction B;

[0035] Figure 9 yes Figure 8 Schematic diagram of the N region of the battery box;

[0036] Figure 10 yes Figure 8 Schematic diagram of the structure of region O in the middle battery box;

[0037] Figure 11 This is a top view of the battery housing according to other embodiments shown in this specification;

[0038] Figure 12 yes Figure 11 Along C of the middle battery box Schematic diagram of the cross-sectional structure along direction C;

[0039] Figure 13 yes Figure 12 A schematic diagram of the structure of region P of the battery box;

[0040] Figure 14 yes Figure 11 Along D of the middle battery box Schematic diagram of the cross-sectional structure along direction D;

[0041] Figure 15 yes Figure 14 A schematic diagram of the structure of the Q region of the battery box;

[0042] Figure 16 This is a structural schematic diagram of the battery box according to other embodiments of this specification.

[0043] The reference numerals in the detailed embodiments are as follows: 1. Vehicle; 10. Battery device; 30. Controller; 40. Motor; 100. Battery module; 110. Battery cell; 20. Battery box; 21. Upper box; 22. Lower box; 23. Base plate; 24. Side wall; 241. First side wall; 242. Second side wall; 242-1. First area; 242-2. Second area; 243. Locking surface; 244. Third wall; 245. Fourth wall; 246. Fifth wall; 247. Sixth wall; 25. Receiving cavity; 26. Accommodation space; 261. Battery management system; 262. Copper bar; 27. Protruding structure; 28. Connecting through hole; 291. First beam; 292. Second beam; 293. Reinforcing rib; 294. Third beam; 294-1. Mounting component. Detailed Implementation

[0044] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0046] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, "multiple groups" means two or more, and "each" means each of the multiple, unless otherwise explicitly defined.

[0047] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] With the development of new energy technologies, batteries are widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace.

[0051] To meet the demand for long driving range, multiple battery cells are typically connected in series, parallel, or a combination thereof to increase battery capacity or power. The installation or securing of multiple battery cells generally requires a battery enclosure. While double-walled battery enclosures offer excellent mechanical performance and safety protection, their increased weight reduces system assembly efficiency. Single-walled battery enclosures, although meeting lightweight requirements, suffer from insufficient structural strength to meet the mechanical demands of complex operating conditions. Furthermore, the locking surfaces of single-walled structures require fastening to the upper enclosure, body (such as in vehicles or other electrical equipment), or other components. During fastening, the bolts exert axial force on the enclosure; the insufficient rigidity of single-walled structures makes them prone to deformation during fastening, posing a risk of seal failure.

[0052] To address the aforementioned issues, this application provides a battery device. The battery device includes a battery cell, a base plate, two first sidewalls spaced apart along a first direction on the base plate, and two second sidewalls spaced apart along a second direction on the base plate. The base plate, the two first sidewalls, and the two second sidewalls form a receiving cavity, in which the battery cell is placed. The first and second directions intersect. The first sidewalls have two or more single-layer walls spaced apart along the first direction, and at least a portion of the second sidewalls is a single-layer wall along the second direction. The first and second sidewalls each have a locking surface at their ends along a third direction away from the base plate. This third direction is perpendicular to the plane formed by the first and second directions. The locking surface of the second sidewall extends towards the receiving cavity along the second direction, and the end of the locking surface of the second sidewall facing the receiving cavity along the second direction has a third wall extending towards the base plate. This battery device can balance the requirements of lightweight design and safety protection. By setting the first sidewall to have two or more single-layer walls spaced apart along the first direction, multiple mechanical requirements such as lateral impact resistance, bending and torsion resistance, and vibration fatigue resistance can be met. The second sidewall mainly bears vibration and impact loads. Modal analysis shows that when the second sidewall adopts a single-layer wall structure, the frequency of the aforementioned vibration is not within the natural frequency range of the second sidewall, which can take into account both the requirements of lightweight and safety protection. Furthermore, by setting a third wall extending towards the bottom plate at one end of the locking surface of the second sidewall along the second direction toward the accommodating cavity, the local stiffness of the locking surface can be enhanced, thereby effectively controlling the deformation of the sealing surface and reducing the risk of sealing failure.

[0053] The electrical devices disclosed in this application can be, but are not limited to, electric vehicles, electric cars, ships, spacecraft, etc. Among them, spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0054] For ease of explanation, the following embodiments will be described using vehicle 1 as an example of an electrical device.

[0055] Please refer to Figure 1 , Figure 1This is a structural schematic diagram of a vehicle according to some embodiments of this specification. Vehicle 1 can be a new energy vehicle, such as a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle. A battery device 10 is installed inside vehicle 1, and the battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1; for example, it can serve as the operating power source for vehicle 1, or it can be used in the electrical system of vehicle 1, such as to meet the power requirements for starting, navigation, and operation of vehicle 1.

[0056] The vehicle 1 may also include a controller 30 and a motor 40, wherein the controller 30 is used to control the battery device 10 to supply power to the motor 40.

[0057] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0058] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device according to some embodiments of this specification. The battery device 10 includes a battery housing 20 and battery cells 110, with the battery cells 110 housed within the battery housing 20. In some embodiments, the battery device may also be referred to as a battery pack.

[0059] In the battery device 10, there can be multiple battery cells 110. Multiple battery cells 110 can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 110 are connected in both series and parallel.

[0060] The battery housing 20 provides a receiving space for the individual battery cells 110, and the battery housing 20 can adopt various structures. In some embodiments, the battery housing 20 may include an upper housing 21 and a lower housing 22, which cover each other and together define a receiving space for accommodating the individual battery cells 110. In some embodiments, the battery housing 20 may include a lower housing 22 but not an upper housing 21, and the lower housing 22 is directly mounted on the body of the electrical device, together with a part of the body, defining a receiving space for accommodating the individual battery cells 110.

[0061] The following is for reference. Figures 3 to 16 The structure of the battery housing in some embodiments of this application will be described in detail.

[0062] refer to Figure 3 , Figure 3 This is a structural schematic diagram of the battery box according to some embodiments of this specification. It should be noted that... Figure 3The battery housing 20 shown can be used alone, or as a lower housing in conjunction with an upper housing (not shown).

[0063] The battery device 10 in some embodiments of this application may include a battery cell 110 and a battery housing 20. The battery housing 20 includes a base plate 23, two first sidewalls 241 spaced apart along a first direction on the base plate 23, and two second sidewalls 242 spaced apart along a second direction on the base plate 23. The base plate 23, the two first sidewalls 241, and the two second sidewalls 242 form a receiving cavity 25 in which the battery cell is placed. The first and second directions intersect. The first sidewalls 241 have two or more single-layer walls spaced apart along the first direction, and at least a portion of the second sidewalls 242 are single-layer walls along the second direction. The first sidewall 241 and the second sidewall 242 are respectively provided with locking surfaces 243 at their ends away from the bottom plate along a third direction. The third direction is perpendicular to the plane formed by the first direction and the second direction. The locking surface of the second sidewall 242 extends toward the receiving cavity along the second direction, and the locking surface 243 of the second sidewall 242 has a third wall 244 extending toward the bottom plate 23 at one end along the second direction toward the receiving cavity 25.

[0064] The first sidewall 241 refers to the wall surface on the battery housing 20 that is spaced apart along a first direction. The second sidewall 242 refers to the wall surface on the battery housing 20 that is spaced apart along a second direction. Both the first sidewall 241 and the second sidewall 242 are mounted on the base plate 23. The base plate 23 extends along the first and second directions and serves as the bottom support structure of the battery device 10. The first direction can be the length direction of the battery device 10, and the second direction can be the width direction of the battery device 10. The first and second directions intersect. The angle between the first and second directions can be 75° to 90°, for example, 80°. When the battery device 10 serves as a power source or energy storage unit for the vehicle 1, the first direction can be the driving direction of the vehicle 1, and the second direction is perpendicular to the driving direction of the vehicle 1.

[0065] In some embodiments, the materials of the first sidewall 241 and the second sidewall 242 may include aluminum alloy, aluminum-magnesium alloy, carbon fiber reinforced composite material, glass fiber reinforced composite material, magnesium alloy, etc. The materials of the first sidewall 241 and the second sidewall 242 may be the same or different.

[0066] The accommodating cavity 25 refers to the cavity that accommodates a single battery cell. The base plate 23, the two first sidewalls 241, and the two second sidewalls 242 can form the accommodating cavity 25, in which the single battery cell is placed.

[0067] A single-layer wall refers to a wall structure made of a single layer of material, which does not form a closed cavity inside.

[0068] refer to Figures 4-6A , Figure 4 This is a top view of the battery housing according to some embodiments shown in this specification; Figure 5 yes Figure 4 Along A of the middle battery box A schematic diagram of the cross-sectional structure along direction A; Figure 6A yes Figure 5 A schematic diagram of the structure of region M of the battery box.

[0069] The fastening surface 243 refers to the interface used for bolt / screw fastening connection with the upper housing, body, or other components. The material of the fastening surface 243 may be the same as or different from the material of the first sidewall 241 and / or the second sidewall 242. The fastening surface 243 may be provided with a connecting through hole 28, for example, as... Figure 4 As shown, a connecting through hole 28 may be provided on the locking surface 243 of the second sidewall 242.

[0070] In some embodiments, the first sidewall 241 and the second sidewall 242 are respectively provided with locking surfaces 243 at their ends away from the base plate along a third direction. The third direction can be the height direction of the battery device 10, and the third direction is perpendicular to the plane formed by the first and second directions. For example, as... Figure 6A As shown, the first sidewall 241 has a locking surface 243 at the end away from the base plate along the third direction.

[0071] In some embodiments, the first sidewall 241 has two or more single-layer walls spaced apart along a first direction, and the two or more single-layer walls, the base plate 23, and the locking surface 243 enclose a cavity structure. In vehicle applications, the first sidewall 241 plays a crucial protective role in the event of a side pillar collision. By configuring the first sidewall 241 as having two or more single-layer walls spaced apart along the first direction, multiple mechanical requirements such as lateral impact resistance, bending and torsion resistance, and vibration fatigue resistance can be met simultaneously.

[0072] In some embodiments, at least a portion of the second sidewall 242 is a single-layer wall along the second direction, which can meet the requirements for lightweight design. For example, as... Figure 6A As shown, the first region 242-1 of the second sidewall 242 is a single-layer wall. The second sidewall 242 mainly bears vibration and impact loads. Modal analysis shows that when the front and rear sidewalls are single-layer wall structures, the frequencies of the aforementioned vibrations are not within the natural frequency range, meaning the natural frequencies meet the standard requirements, and the single-layer wall structure can withstand impact loads. Therefore, by setting at least a portion of the second sidewall 242 to be a single-layer wall along the second direction, the lightweight requirements can be met.

[0073] In some embodiments, the locking surface 243 of the second sidewall 242 has a third wall 244 extending toward the base plate 23 at one end along the second direction toward the receiving cavity 25. The material of the third wall 244 may be the same as or different from the material of the first sidewall 241 and / or the second sidewall 242.

[0074] The locking surface 243 needs to be locked to the upper housing, body, or other components. During the locking process, bolts / screws apply axial force to the locking surface 243. If the locking surface 243 is a single-layer wall structure, its rigidity is insufficient, and it is prone to deformation during locking, posing a risk of seal failure. By setting a third wall 244, the rigidity of the locking surface 243 can be enhanced, ensuring that the deformation of the locking surface 243 is minimal during locking, thereby guaranteeing the reliability of the sealing connection. For example, as... Figure 6A As shown, the locking surface 243 of the second sidewall 242 has a third wall 244 extending in the third direction toward the accommodating cavity 25 at one end.

[0075] In some embodiments, the third wall 244, the locking surface 243 and the second side wall 242 can be integrally formed, thereby eliminating the need for additional welding or riveting and reducing process and assembly errors.

[0076] In the technical solution provided in this application embodiment, by setting the first sidewall 241 to have two or more single-layer walls spaced apart along the first direction, and setting at least a portion of the second sidewall 242 to be a single-layer wall along the second direction, the requirements of lightweighting and safety protection can be balanced. Furthermore, by providing the third wall 244, the rigidity of the locking surface 243 can be enhanced while maintaining a compact external profile and without significantly increasing the overall weight. This ensures minimal deformation of the locking surface 243 during the locking process, thereby guaranteeing the reliability of the sealed connection.

[0077] refer to Figure 6B , Figure 6B yes Figure 5 Another structural diagram of the M region of the battery box.

[0078] In some embodiments, such as Figure 6B As shown, the locking surface 243 of the second sidewall 242 is provided with a protruding structure 27 on the side facing the bottom plate 23 in a third direction, and the protruding structure 27 is connected to the second sidewall 242 and the third wall 244.

[0079] The locking surface 243 is located on the side facing the base plate 23 in a third direction, and may be... Figure 3 The lower surface of the locking face 243.

[0080] The protruding structure 27 refers to the portion that protrudes outward from the locking surface 243. In some embodiments, the protruding structure 27 may include annular ribs, elongated ribs, block ribs, etc.

[0081] like Figure 6B As shown, the protruding structure 27 can be connected to the second sidewall 242 and the third wall 244. During the fastening process, the axial force applied by the bolt / screw to the fastening surface 243 can be transmitted to the second sidewall 242 and the third wall 244, thereby increasing the structural strength of the fastening surface 243 with the help of the second sidewall 242 and the third wall 244.

[0082] In the technical solution provided in this application embodiment, by providing a protruding structure 27 on the side of the locking surface 243 of the second sidewall 242 facing the bottom plate 23 in a third direction, and the protruding structure 27 being connected to the second sidewall 242 and the third wall 244, the axial force applied by the bolt / screw to the locking surface 243 can be transmitted to the second sidewall 242 and the third wall 244, thereby strengthening the strength of the locking surface 243.

[0083] In some embodiments, the protrusion structure 27 may include an annular rib surrounding the outside of the connecting through hole 28 on the locking surface 243.

[0084] The annular rib refers to the rib that is arranged around the outside of the connecting through hole 28 on the locking surface 243 and protrudes out of the locking surface 243.

[0085] In the technical solution provided in this application embodiment, the annular rib is connected between the second side wall 242 and the third wall 244 to strengthen the strength of the locking surface 243, while increasing the strength of the locking area around the connecting through hole 28, preventing the locking surface 243 from being concave and deformed during locking, and dispersing the stress along the circumferential direction to avoid stress concentration.

[0086] Reference Figure 6C , Figure 6C yes Figure 5 Another structural diagram of the M region of the battery box.

[0087] In some embodiments, such as Figure 6C As shown, the battery housing 20 may also include a fourth wall 245 disposed opposite to the locking surface 243 of the second side wall 242 in a third direction toward the bottom plate 23, and the fourth wall 245 is connected to the second side wall 242 and the third wall 244.

[0088] The material of the fourth wall 245 may be the same as or different from the material of the first side wall 241 and / or the second side wall 242.

[0089] The fourth wall 245, the second side wall 242, the locking surface 243, and the third wall 244 enclose a cavity structure, which can further enhance the rigidity of the locking surface 243 and ensure that the deformation of the locking surface 243 is small during the locking process, thereby ensuring the reliability of the sealing connection. In addition, since the third wall 244 is the end of the second side wall 242's locking surface 243 extending towards the accommodating cavity 25 in the second direction and towards the bottom plate 23, the cavity structure formed by the fourth wall 245, the second side wall 242, the locking surface 243, and the third wall 244 protrudes into the accommodating cavity 25, thereby ensuring a compact external profile.

[0090] In some embodiments, the fourth wall 245, the second side wall 242, the locking surface 243, and the third wall 244 can be integrally formed, thereby eliminating the need for additional welding or riveting and reducing process and assembly errors.

[0091] In the technical solution provided in this application embodiment, by setting a fourth wall 245, the rigidity can be improved by local reinforcement and the reliability of the sealing connection can be guaranteed while ensuring a compact external contour and without significantly increasing the overall weight.

[0092] In some embodiments, such as Figures 6A-6C As shown, the second sidewall 242 includes a first region 242-1 and a second region 242-2 distributed sequentially along a third direction. The second region 242-2 is closer to the bottom plate 23 than the first region 242-1. The battery box 20 also includes a fifth wall 246 disposed on the bottom plate 23 and disposed opposite to the side of the second region 242-2 facing the accommodating cavity 25 along a second direction, and a sixth wall 247 connecting the second region 242-2 and the fifth wall 246.

[0093] The materials of the fifth wall 246 and the sixth wall 247 may be the same as or different from the materials of the first side wall 241 and / or the second side wall 242.

[0094] The fifth wall 246, the sixth wall 247, the second region 242-2, and the base plate 23 enclose and form a cavity structure. (Example) Figures 6A-6C As shown, the first region 242-1 of the second sidewall 242 is a single-layer wall. Considering that the bottom plate 23 needs to bear the weight of the battery cell, the bottom plate 23 is under great stress. Therefore, the connection position between the second region 242-2 of the second sidewall 242 and the bottom plate 23 is under great stress. In order to ensure the structural strength of the connection position, a cavity structure is formed by the fifth wall 246, the sixth wall 247, the second region 242-2 and the bottom plate 23. Without significantly increasing the overall weight, the local strength of the connection position between the second region 242-2 and the bottom plate 23 is effectively enhanced, avoiding structural failure caused by excessive local stress.

[0095] In addition, since the fifth wall 246 is disposed opposite to the second region 242-2 along the second direction toward the receiving cavity 25, the fifth wall 246, the sixth wall 247, the second region 242-2 and the bottom plate 23 enclose and form a cavity structure that protrudes into the receiving cavity 25, thereby ensuring a compact external profile.

[0096] In some embodiments, the fifth wall 246, the sixth wall 247, the second region 242-2 and the base plate 23 can be integrally formed, thereby eliminating the need for additional welding or riveting and reducing process and assembly errors.

[0097] In the technical solution provided in this application embodiment, by setting the fifth wall 246 and the sixth wall 247, the local strength of the connection position between the second region 242-2 and the base plate 23 can be enhanced without significantly increasing the overall weight, while ensuring a compact external outline. This avoids structural failure caused by excessive local stress.

[0098] In some embodiments, such as Figures 6A-6C As shown, the battery device 10 also includes electrical components. At least a portion of the electrical components are located in a receiving space 26 between the locking surface 243 of the third-side-facing second sidewall 242 and the sixth wall 247.

[0099] Since the first region 242-1 of the second sidewall 242 is a single-layer wall, a receiving space 26 can be formed between the locking surface 243 of the second sidewall 242 and the sixth wall 247 in the third direction.

[0100] In the technical solution provided by the embodiments of this application, by placing at least a portion of the electrical components in the accommodating space 26 between the locking surface 243 and the sixth wall 247 of the second sidewall 242 in the third direction, the redundant space of the structure can be fully utilized, the battery pack can be made compact and lightweight, and the space utilization rate in the first direction can be improved; and the electrical components are located in the accommodating space 26, which can be protected in the event of collision or other conditions.

[0101] Electrical components refer to the electronic / electrical elements inside a battery pack, excluding individual battery cells, used to achieve functions such as power distribution, control, protection, monitoring, and signal transmission. Examples of electrical components include high-voltage boxes, battery management systems, copper bars, relays, fuses, current sensors, wiring harnesses, heating films, and fuse boxes.

[0102] In some embodiments, the electrical components may include at least one of a high-voltage box, a battery management system, and a copper bar. For example, such as Figure 13 As shown, at least a portion of the battery management system 261 is located within the housing space 26. For example, as... Figure 15 As shown, at least a portion of the copper bar 262 is located in the receiving space 26.

[0103] In the technical solution provided in this application embodiment, when the electrical component is a high-voltage box, it is located in the accommodating space 26, which can shorten the high-voltage power distribution circuit and improve the high-voltage safety isolation; when the electrical component is a battery management system 261, it is located in the accommodating space 26, which can shorten the sampling harness length and optimize electromagnetic compatibility; when the electrical component is a copper bar 262, it is located in the accommodating space 26, which can reduce the connection resistance and enhance the high-voltage connection reliability; when at least two of the high-voltage box, battery management system 261 and copper bar 262 are integrated in the accommodating space 26, a synergistic effect is formed between the electrical components, which further simplifies the high-voltage power distribution and control circuit and improves the overall integration and reliability of the battery device 10.

[0104] Reference Figures 7-15 , Figure 7 This is a top view of the battery housing according to other embodiments shown in this specification; Figure 8 yes Figure 7 Along B of the middle battery box Schematic diagram of the cross-sectional structure along direction B; Figure 9 yes Figure 8 Schematic diagram of the N region of the battery box; Figure 10 yes Figure 8 Schematic diagram of the structure of region O in the middle battery box; Figure 11 This is a top view of the battery housing according to other embodiments shown in this specification; Figure 12 yes Figure 11 Along C of the middle battery box Schematic diagram of the cross-sectional structure along direction C; Figure 13 yes Figure 12 A schematic diagram of the structure of region P of the battery box; Figure 14 yes Figure 11 Along D of the middle battery box Schematic diagram of the cross-sectional structure along direction D; Figure 15 yes Figure 14 A schematic diagram of the Q region of the battery housing. Wherein, Figures 7-10 This is a top view of the battery compartment, which does not show electrical components. Figures 11-15 A top view showing the battery compartment housing the electrical components.

[0105] In some embodiments, such as Figure 7 and Figure 11 As shown, the accommodating cavity 25 also has a first beam 291 and a second beam 292 spaced apart along a second direction, both the first beam 291 and the second beam 292 being connected to two first sidewalls 241; an electrical component is disposed between the first beam 291 and one of the two second sidewalls 242. Figure 7 Not shown in the image. Figure 11The battery management system 261 and copper bar 262 shown are electrical components. The second beam 292 is connected to another of the two second sidewalls 242 by a reinforcing rib 293.

[0106] The first beam 291 and the second beam 292 refer to structural reinforcements in the battery housing used to resist and constrain the volume expansion force generated by the battery cells 110 during charging and discharging. The materials of the first beam 291 and the second beam 292 may be the same as or different from the materials of the first sidewall 241 and / or the second sidewall 242.

[0107] like Figure 8 and Figure 9 As shown, there is space between the first beam 291 and one of the two second sidewalls 242 where electrical components can be installed. Figures 11-15 As shown, electrical components are provided between the first beam 291 and one of the two second sidewalls 242: a battery management system 261 and a copper bar 262.

[0108] like Figure 8 and Figure 11 As shown, the second beam 292 is connected to the other of the two second sidewalls 242 by a reinforcing rib 293.

[0109] In the technical solution provided in this application embodiment, the first sidewall 241 has two or more single-layer walls spaced apart along a first direction. The first beam 291 and the second beam 292 are both connected to the two first sidewalls 241. The first sidewalls 241 can be used to increase the force resisting the deformation of the first beam 291 and the second beam 292 against the deformation of the battery cell. By setting an electrical component between the first beam 291 and one of the two second sidewalls 242, the functional partitioning of the electrical component and the battery cell 110 is realized, avoiding the electrical component being squeezed by the battery cell 110 when the structure is under stress. Furthermore, the electrical component and the battery cell 110 are physically isolated, improving the overall safety of the battery device 10 and facilitating subsequent inspection and maintenance. By connecting the second beam 292 to the other of the two second sidewalls 242 through a reinforcing rib 293, the structural strength of the second sidewall is further improved on the basis of lightweighting.

[0110] Reference Figure 16 , Figure 16 This is a structural schematic diagram of a battery housing according to other embodiments of this specification. In some embodiments, the accommodating cavity 25 further includes a third beam 294, which is connected to two first sidewalls 241 and / or a base plate 23. A mounting member 294-1 is provided at the end of the third beam 294 away from the base plate 23 in a third direction.

[0111] The third beam 294 refers to the beam structure in the battery box used to fix the module and connect the body. The material of the third beam 294 may be the same as or different from the material of the first side wall 241 and / or the second side wall 242.

[0112] In some embodiments, the third beam 294 may be connected to the two first sidewalls 241 and the base plate 23. In other embodiments, the third beam 294 may be connected to either the two first sidewalls 241 or the base plate 23.

[0113] The third beam 294 has a mounting component 294-1 at its end away from the base plate 23 along the third direction. The mounting component 294-1 is a functional component that connects and fixes the battery device 10 to the fuselage.

[0114] In some embodiments, the third beam 294 may have two or more single-layer walls spaced apart along a first direction. In other embodiments, at least a portion of the third beam 294 is a single-layer wall along a second direction, and the third beam 294 has a structure similar to the locking surface 243 and the third wall 244, thereby improving the stiffness of the third beam 294 without significantly increasing the overall weight and ensuring the stability of the load.

[0115] In the technical solution provided in this application embodiment, the third beam 294 is connected to the two first side walls 241 and / or the bottom plate 23, so that the third beam 294 and the two first side walls 241 and / or the bottom plate 23 form a stable spatial force system, which can efficiently transfer the load to the battery box body and avoid local stress concentration. The end of the third beam 294 away from the bottom plate 23 along the third direction is provided with a mounting component 294-1. The mounting component 294-1 is located on the upper part of the battery box, which is convenient for assembly and maintenance. Moreover, the third beam 294, as a local reinforcement structure, can provide a high-strength mounting component 294-1 without significantly increasing the overall weight, thereby improving the reliability of the mounting and the overall safety of the battery device 10.

[0116] According to an embodiment of this application, a battery device 10 is provided. The battery device 10 includes a battery cell 110, a base plate 23, two first sidewalls 241 spaced apart along a first direction on the base plate 23, two second sidewalls 242 spaced apart along a second direction on the base plate 23, and electrical components. The base plate 23, the two first sidewalls 241, and the two second sidewalls 242 form a receiving cavity 25, in which the battery cell is placed. The first and second directions intersect. The first sidewalls 241 have two or more single-layer walls spaced apart along the first direction, and at least a portion of the second sidewalls 242 are single-layer walls along the second direction. The first sidewall 241 and the second sidewall 242 are respectively provided with locking surfaces 243 at their ends away from the base plate along a third direction. The third direction is perpendicular to the plane formed by the first direction and the second direction. The locking surface 243 of the second sidewall 242 extends toward the receiving cavity 25 along the second direction, and the end of the locking surface 243 of the second sidewall 242 toward the receiving cavity 25 along the second direction has a third wall 244 extending toward the base plate 23. The second sidewall 242 includes a first region 242-1 and a second region 242-2 distributed sequentially along the third direction. The second region 242-2 is closer to the base plate 23 than the first region 242-1. The battery device 10 also includes a fifth wall 246 disposed on the base plate 23 and disposed opposite to the side of the second region 242-2 toward the receiving cavity 25 along the second direction, and a sixth wall 247 connecting the second region 242-2 and the fifth wall 246. At least a portion of the electrical components are located in a receiving space 26 between the locking surface 243 of the third-side upward second sidewall 242 and the sixth wall 247.

[0117] This application also provides an electrical device, which includes a battery device 10 as described above, the battery device 10 serving as the power source for the electrical device and / or the energy storage unit for the electrical device.

[0118] The beneficial effects that the embodiments of this specification may bring include, but are not limited to: (1) The first sidewall is provided with multiple single-layer walls at intervals along the first direction, and a part of the second sidewall is a single-layer wall along the second direction. While taking into account both lightweight and safety, the third wall can enhance the rigidity of the locking surface and improve the sealing reliability while maintaining a compact structure. (2) The fifth and sixth walls enhance the local strength at the connection between the second sidewall and the base plate while maintaining a compact structure, thus avoiding structural failure. (3) The electrical components are arranged in the accommodation space between the locking surface and the sixth wall, which can make full use of the redundant space, achieve compactness and lightweight, and form effective protection in the event of a collision. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced can be any one or a combination of the above, or any other possible beneficial effects.

[0119] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The device includes a battery cell, a base plate, two first sidewalls spaced apart on the base plate along a first direction, and two second sidewalls spaced apart on the base plate along a second direction; the base plate, the two first sidewalls, and the two second sidewalls form a receiving cavity, and the battery cell is placed in the receiving cavity, wherein the first direction and the second direction intersect. The first sidewall has two or more single-layer walls spaced apart along the first direction, and at least a portion of the second sidewall is a single-layer wall along the second direction; The first sidewall and the second sidewall are respectively provided with locking surfaces at their ends away from the base plate along a third direction, the third direction being perpendicular to the plane formed by the first direction and the second direction. The locking surface of the second sidewall extends toward the receiving cavity along the second direction, and the end of the locking surface of the second sidewall toward the receiving cavity along the second direction has a third wall extending toward the base plate.

2. The battery device according to claim 1, characterized by The locking surface of the second sidewall is provided with a protruding structure on the side facing the bottom plate in the third direction, and the protruding structure is connected to the second sidewall and the third wall.

3. The battery device of claim 2, wherein, The protruding structure includes an annular rib that is wrapped around the outside of the connecting through hole on the locking surface.

4. The battery device of claim 1, wherein It also includes a fourth wall disposed opposite to the locking surface of the second sidewall along the third direction toward the bottom plate, the fourth wall being connected to the second sidewall and the third wall.

5. The battery device of claim 1, wherein The second sidewall includes a first region and a second region distributed sequentially along the third direction, wherein the second region is closer to the bottom plate than the first region; The battery device further includes a fifth wall disposed on the base plate and disposed opposite to the side of the second region facing the accommodating cavity along the second direction, and a sixth wall connecting the second region and the fifth wall.

6. The battery device of claim 5, wherein, It also includes electrical components; at least a portion of the electrical components are located in a receiving space between the locking surface of the second sidewall facing upwards from the third party and the sixth wall.

7. The battery device of claim 6, wherein The electrical components include at least one of a high-voltage box, a battery management system, and a copper bar.

8. The battery device according to any one of claims 1 to 7, wherein The accommodating cavity also includes a first beam and a second beam spaced apart along the second direction, both of which are connected to the two first sidewalls. An electrical component is provided between the first beam and one of the two second sidewalls, and the second beam is connected to the other of the two second sidewalls by a reinforcing rib.

9. The battery device according to any one of claims 1 to 7, wherein The accommodating cavity also has a third beam, which is connected to the two first sidewalls and / or the bottom plate. The end of the third beam away from the bottom plate in the third direction is provided with a mounting member.

10. An electrical device, characterized by Includes the battery device as described in any one of claims 1 to 9, wherein the battery device serves as a power source for the electrical device and / or an energy storage unit for the electrical device.

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