Box body, battery and electric device
Patent Information
- Application Number
- CN202280096971.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-30
- Publication Date
- 2025-01-21
AI Technical Summary
The existing battery box has insufficient structural strength under the action of battery expansion force, resulting in performance degradation and making it difficult to increase the energy density of the battery.
Design a box body, including a bottom plate and a frame. The frame is arranged around the bottom plate and defines a containing cavity with the bottom plate. The frame is composed of a first sub-beam, a second sub-beam and a connecting sub-beam. The connecting sub-beam connects the first sub-beam and the The second sub-beam disperses the expansion force so that the first sub-beam can maintain high structural strength without requiring larger volume and weight.
The volume energy density and weight energy density of the battery are improved, the box's resistance to battery expansion force is enhanced, and the box's volume and weight are reduced.
Smart Images
Figure CN119343814A_ABST
Abstract
Description
Box, battery and electrical device Technical Field
[0001] The present application relates to the field of battery technology, and in particular to a box, a battery, and an electrical device. Background Art
[0002] With the increasing severity of environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor in its development.
[0003] The development of battery technology requires consideration of multiple design factors, such as energy density, cycle life, and safety performance. The design of the battery casing is crucial to the battery's energy density. Therefore, how to provide a casing to improve the battery's energy density is a technical problem that needs to be solved urgently.
[0004] Summary of the Invention
[0005] The present application provides a box, a battery and an electrical device, which can improve the energy density of the battery.
[0006] In a first aspect, a box is provided, comprising: a base plate; a frame, wherein the frame is arranged at the periphery of the base plate and defines a first accommodating cavity with the base plate, the first accommodating cavity being used to accommodate a battery cell; wherein the frame comprises a first beam, the first beam comprises a first sub-beam, a second sub-beam and a connecting sub-beam, the first sub-beam and the second sub-beam extend along a first direction, the first sub-beam is used to define the first accommodating cavity, the second sub-beam is away from the first accommodating cavity relative to the first sub-beam, and the connecting sub-beam connects the first sub-beam and the second sub-beam.
[0007] In the implementation of the present application, the housing includes a base plate and a frame. The frame is arranged around the base plate and defines a first accommodating cavity with the base plate. The first accommodating cavity is used to accommodate a battery cell. The frame includes a first beam, the first beam includes a first sub-beam, a second sub-beam, and a connecting sub-beam. The first sub-beam and the second sub-beam extend along a first direction. The first sub-beam is used to define the first accommodating cavity. The second sub-beam is away from the first accommodating cavity relative to the first sub-beam. The connecting sub-beam connects the first sub-beam and the second sub-beam. In this way, when the first sub-beam is subjected to the expansion force of the battery cell, the force can be dispersed to the second sub-beam through the connecting sub-beam. As a result, the first sub-beam does not need to be set up with a large volume and weight to maintain a high structural strength to resist the expansion force. Therefore, the housing of the present application can improve the volume energy density and weight energy density of the battery.
[0008] In a possible implementation, the connecting sub-beam at least connects non-end regions of the first sub-beam and the second sub-beam in the first direction.
[0009] When the first sub-beam is subjected to an expansion force, the first sub-beam bulges away from the first accommodating cavity, with the non-end region of the first sub-beam in the first direction bulging more significantly than the end region. Providing a connecting sub-beam that connects at least the non-end regions of the first sub-beam and the second sub-beam in the first direction facilitates better dispersal of the expansion force to the second sub-beam via the connecting sub-beam.
[0010] In one possible implementation, along the second direction, the connecting sub-beam is smaller than the first sub-beam; and / or the connecting sub-beam is smaller than the second sub-beam, and the second direction is perpendicular to the base plate. This helps reduce the volume and weight of the connecting sub-beam, thereby improving the volumetric energy density and gravimetric energy density of the battery.
[0011] In a possible implementation, the connecting sub-beam is provided at one end of the first sub-beam along the second direction close to the bottom plate, which is advantageous for processing and forming the first beam.
[0012] In one possible implementation, the connecting sub-beam extends continuously in the first direction to the ends of the first sub-beam and the second sub-beam in the first direction. This helps the connecting sub-beam better transfer the expansion force exerted on the first sub-beam to the second sub-beam, thereby further dissipating the expansion force exerted on the first sub-beam.
[0013] In a possible implementation, the connecting sub-beam is disposed in a middle region of the first sub-beam along the second direction, so as to more evenly distribute the expansion force exerted on the first sub-beam to the second sub-beam through the connecting sub-beam.
[0014] In a possible implementation, the first beam includes a plurality of connecting sub-beams, and the plurality of connecting sub-beams are spaced apart in the first direction, so that the positions and numbers of the connecting sub-beams can be flexibly set according to actual needs.
[0015] In a possible implementation, the first beam is an integrally formed structure, which helps reduce the number of processing steps and facilitates the processing of the first beam.
[0016] In a possible implementation, the connecting sub-beam is welded to the first sub-beam and / or the second sub-beam. In this way, the connection method of the connecting sub-beam and the first sub-beam or the second sub-beam can be flexibly selected according to the structure of the first beam.
[0017] In one possible implementation, along the second direction, the sizes of the second sub-beam, the first sub-beam and the battery cell satisfy: h≥k≥n; wherein h is the size of the second sub-beam along the second direction, k is the size of the first sub-beam along the second direction, and n is the size of the battery cell along the second direction, and the second direction is perpendicular to the base plate.
[0018] In this implementation, along the second direction, the size of the second sub-beam is greater than or equal to the size of the first sub-beam. The second sub-beam can effectively protect the battery cells and other components inside the box, and prevent external impacts, vibrations, etc. from affecting the battery cells or other components inside the box; along the second direction, the size of the first sub-beam is greater than or equal to the size of the battery cells, which can more effectively resist the expansion force of the battery cells.
[0019] In one possible implementation, along the second direction, the dimensions of the connecting sub-beam and the first sub-beam satisfy the following: 2k / 3 ≥ p ≥ k / 5; where k is the dimension of the first sub-beam along the second direction, and p is the dimension of the connecting sub-beam along the second direction, and the second direction is perpendicular to the base plate. This ensures that the connecting sub-beam effectively transfers and distributes the force acting on the first sub-beam to the second sub-beam, ensuring that the first beam can resist the expansion force of the battery cells, while also preventing the connecting sub-beam from being too large and occupying too much space.
[0020] In a possible implementation, along the second direction, the dimensions of the connecting sub-beam and the first sub-beam satisfy: p = k / 3 ± 5 mm. In this way, the effect of the first beam in resisting expansion force and the volume of the connecting sub-beam can be further taken into account.
[0021] In one possible implementation, a cavity is provided inside at least one of the first sub-beam, the second sub-beam, and the connecting sub-beam, which is beneficial for reducing the weight of the first beam and thereby improving the weight energy density of the battery.
[0022] In one possible implementation, the thickness of the wall forming the cavity is 0.5 mm to 5 mm. This can avoid insufficient structural strength of the cavity or the first beam due to a thin wall, and also avoid increased weight of the first beam due to a thick wall.
[0023] In a possible implementation, the thickness of the wall forming the cavity is 1 to 3 mm. In this way, the structural strength and weight of the first beam can be further taken into consideration.
[0024] In one possible implementation, the first sub-beam, the connecting sub-beam, and the second sub-beam collectively define a second accommodating cavity for accommodating a connecting assembly connected to the battery cell. This not only improves the space utilization of the box, but also makes the arrangement of the connecting assembly more neat and regular.
[0025] In one possible implementation, a fixing assembly is provided in the second accommodating cavity, and the fixing assembly is used to fix the connecting assembly to the second accommodating cavity. This facilitates fixing the connecting assembly in the second accommodating cavity and prevents the connecting assembly from being separated from the second accommodating cavity due to factors such as shaking.
[0026] In a possible implementation, the fixing assembly is arranged on a wall forming the second accommodating cavity, so that the space of the second accommodating cavity can be fully utilized, further improving the space utilization rate of the box.
[0027] In one possible implementation, the box includes two first beams arranged along a third direction, with one first beam disposed at each end of the box along the third direction. The third direction is perpendicular to the first direction and parallel to the bottom plate. In this way, the two first beams disposed at both ends of the third direction can more effectively resist expansion of the battery cells.
[0028] In a possible implementation, the first direction is parallel to the surface of the battery cell with the largest surface area. In this way, the first sub-beam is arranged opposite to the surface of the battery cell with the largest surface area, which can more effectively resist the expansion of the battery cell.
[0029] In one possible implementation, in the first direction, the connecting sub-beam is disposed at the center of the surface with the largest surface area of the battery cell. In this way, the connecting sub-beam can more effectively transfer and disperse the expansion force exerted on the first sub-beam to the second sub-beam.
[0030] In a possible implementation, the connecting sub-beam is perpendicular to the first sub-beam and the second sub-beam, so as to facilitate the installation of the connecting sub-beam and the transmission of the expansion force.
[0031] In one possible implementation, the connecting sub-beam has a dimension of 5 mm to 500 mm along a third direction perpendicular to the first direction and parallel to the base plate. This prevents the connecting sub-beam from being too long in the third direction and taking up too much space, while also preventing the connecting sub-beam from being too short in the third direction and making it difficult to process.
[0032] In a possible implementation, along the third direction, the size of the connecting sub-beam is 30 mm to 40 mm. In this way, the convenience of production and processing and the volume of the connecting sub-beam can be further taken into consideration.
[0033] In one possible implementation, the first sub-beam has a dimension of 10 mm to 50 mm along the third direction, which is perpendicular to the first direction and parallel to the base plate. This avoids the problem of the first sub-beam being too small in the third direction, resulting in insufficient strength to resist the expansion force of the battery cell, and also avoids the problem of the first sub-beam being too large in the third direction, resulting in a reduced volumetric energy density of the battery.
[0034] In a possible implementation, along the third direction, the size of the first sub-beam is 18 mm to 22 mm. In this way, both the volume energy density of the battery and the structural strength of the first beam can be further considered.
[0035] In one possible implementation, the second sub-beam has a dimension of 10 mm to 50 mm along a third direction perpendicular to the first direction and parallel to the base plate. This ensures both the structural strength of the second sub-beam and the volumetric energy density of the battery.
[0036] In a possible implementation, along the third direction, the size of the second sub-beam is 20 mm to 24 mm. In this way, both the structural strength of the second sub-beam and the volume energy density of the battery can be taken into consideration.
[0037] In one possible implementation, the box further includes a second beam extending along a third direction and connected to the end of the first beam along the first direction to form the frame. The third direction is perpendicular to the first direction and parallel to the bottom plate. Thus, the first and second beams enclose a frame to protect the battery cells within the box.
[0038] In a possible implementation, the first beam and the second beam are connected by welding. This connection method is easy to operate and helps save processing time.
[0039] In one possible implementation, an end portion along the first direction of at least one of the first sub-beam, the second sub-beam, and the connecting sub-beam of the first beam is welded to the second beam. In this way, the connection method between the first beam and the second beam can be flexibly configured according to actual needs, thereby facilitating flexible configuration of the connection strength between the first beam and the second beam and facilitating production and processing convenience.
[0040] In a possible implementation, the base plate is connected to the frame by welding or riveting, so that the connection mode between the base plate and the frame can be flexibly set according to actual needs.
[0041] In a second aspect, a battery is provided, comprising a battery cell; a box body as described in any one of the first aspect and its possible implementations, the box body being used to accommodate the battery cell; and a cover portion, the cover portion being used to cover the box body.
[0042] According to a third aspect, an electrical device is provided, comprising the battery according to the second aspect, wherein the battery is used to supply power to the electrical device.
[0043] In the implementation of the present application, the housing includes a base plate and a frame. The frame is arranged around the base plate and defines a first accommodating cavity with the base plate. The first accommodating cavity is used to accommodate a battery cell. The frame includes a first beam, the first beam includes a first sub-beam, a second sub-beam, and a connecting sub-beam. The first sub-beam and the second sub-beam extend along a first direction. The first sub-beam is used to define the first accommodating cavity. The second sub-beam is away from the first accommodating cavity relative to the first sub-beam. The connecting sub-beam connects the first sub-beam and the second sub-beam. In this way, when the first sub-beam is subjected to the expansion force of the battery cell, the force can be dispersed to the second sub-beam through the connecting sub-beam. As a result, the first sub-beam does not need to be set up with a large volume and weight to maintain a high structural strength to resist the expansion force. Therefore, the housing of the present application can improve the volume energy density and weight energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.
[0045] FIG1 is a schematic structural diagram of a vehicle according to an embodiment of the present application;
[0046] FIG2 is a schematic structural diagram of a box body according to an embodiment of the present application;
[0047] FIG3 is a schematic diagram of the exploded structure of a box according to an embodiment of the present application;
[0048] FIG4 is a schematic structural diagram of a first beam according to an embodiment of the present application;
[0049] FIG5 is a top view of a box according to an embodiment of the present application;
[0050] FIG6 is a cross-sectional view of the box body in FIG5 along the AA direction;
[0051] FIG7 is an enlarged schematic diagram of area B in FIG6 ;
[0052] FIG8 is a schematic structural diagram of a first beam according to an embodiment of the present application;
[0053] FIG9 is a cross-sectional view of the first beam in FIG8 along the CC direction;
[0054] FIG10 is a schematic structural diagram of a first beam according to an embodiment of the present application;
[0055] FIG11 is a schematic structural diagram of a box according to an embodiment of the present application;
[0056] FIG12 is an enlarged schematic diagram of area D in FIG11 ;
[0057] FIG13 is a schematic structural diagram of a box according to an embodiment of the present application;
[0058] FIG14 is an enlarged schematic diagram of region E in FIG13 ;
[0059] FIG15 is a cross-sectional view of the box body in FIG13 along the FF direction;
[0060] FIG16 is a top view of area D in FIG11 ;
[0061] FIG17 is a cross-sectional view taken along line VV in FIG16 ;
[0062] FIG18 is a schematic structural diagram of a box according to an embodiment of the present application;
[0063] FIG19 is a schematic structural diagram of a box according to an embodiment of the present application;
[0064] FIG20 is a schematic structural diagram of a battery according to an embodiment of the present application.
[0065] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION
[0066] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.
[0067] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.
[0068] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0069] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.
[0070] With the advancement of battery technology, performance requirements are becoming increasingly stringent. Among these, battery energy density, specifically its volumetric and gravimetric energy densities, is crucial to battery performance. The weight and space occupied by the battery casing directly impact these two factors. Therefore, developing a casing that improves both these factors is a pressing technical challenge.
[0071] Researchers and developers noticed that during the use of battery cells, due to the charge and discharge cycles of the battery cells and the occurrence of side reactions, the battery cells will expand, causing structural deformation and bulging of the box assembly, thereby causing the battery's airtightness to fail and making it difficult to ensure battery performance.
[0072] To resist the expansion force of the battery cells, researchers discovered that expansion beams extending in a specific direction could be installed in the housing to resist the expansion of the battery cells. Battery cells generate significant expansion forces in the later stages of expansion, so expansion beams typically need to be larger in size and weight to buffer or resist the expansion force of the battery cells, thereby preventing the expansion beams from breaking when resisting the expansion force due to insufficient structural strength. However, while these larger and heavier expansion beams have sufficient structural strength to resist the expansion force, they occupy a larger space and are heavier, hindering the improvement of the battery's volumetric and gravimetric energy densities.
[0073] In view of this, the present application provides a box body, which includes a bottom plate and a frame. The frame is arranged around the bottom plate and defines a first accommodating cavity with the bottom plate. The first accommodating cavity is used to accommodate battery cells. The frame includes a first beam, and the first beam includes a first sub-beam, a second sub-beam, and a connecting sub-beam. The first sub-beam and the second sub-beam extend along a first direction. The first sub-beam is used to define the first accommodating cavity. The second sub-beam is away from the first accommodating cavity relative to the first sub-beam. The connecting sub-beam connects the first sub-beam and the second sub-beam. In this way, when the first sub-beam is subjected to the expansion force of the battery cell, the force can be dispersed to the second sub-beam through the connecting sub-beam. As a result, the first sub-beam does not need to be set up with a large volume and weight to maintain a high structural strength to resist the expansion force. Therefore, the box body of the present application can improve the volume energy density and weight energy density of the battery.
[0074] The technical solutions described in the embodiments of the present application are applicable to various battery-using devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.
[0075] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as an example.
[0076] For example, as shown in FIG1 , which is a structural diagram of a vehicle according to an embodiment of the present application, the vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 400, a controller 60 and a battery 10 may be provided inside the vehicle 1, and the controller 60 is used to control the battery 10 to power the motor 400. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.
[0077] Figure 2 is a schematic diagram of the structure of the housing according to one embodiment of the present application, Figure 3 is an exploded schematic diagram of the structure of the housing according to one embodiment of the present application, and Figure 4 is a schematic diagram of the structure of the first beam according to one embodiment of the present application. In this embodiment of the present application, as shown in Figures 2 to 4 , the housing 30 includes a bottom plate 31 and a frame 32. The frame 32 is disposed around the bottom plate 31 and defines a first accommodating cavity 310 with the bottom plate 31. The first accommodating cavity 310 is used to accommodate the battery cells 20.
[0078] The bottom plate 31 is used to enclose the frame 32 to form a first accommodating cavity 310 for accommodating the battery cell 20. During normal use of the box body 30, the bottom plate 31 can face the ground or away from the ground.
[0079] The shape of the bottom plate 31 corresponds to the shape of the frame 32, and can be circular, square or polygonal, and can be specifically set according to actual needs. The bottom plate 31 can be a metal plate or a polymer plate, and the frame 32 can be a metal frame. This application does not make specific restrictions on this.
[0080] The battery cell 20 may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and the present embodiment does not limit this. The battery cell may be cylindrical, flat, rectangular, or in other shapes, and the present embodiment does not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the present embodiment does not limit this.
[0081] The frame 32 includes a first beam 33, the first beam 33 includes a first sub-beam 331, a second sub-beam 332 and a connecting sub-beam 333, the first sub-beam 331 and the second sub-beam 332 extend along a first direction, the first sub-beam 331 is used to define the first accommodating cavity 310, the second sub-beam 332 is away from the first accommodating cavity 310 relative to the first sub-beam 331, and the connecting sub-beam 333 connects the first sub-beam 331 and the second sub-beam 332.
[0082] The first direction is parallel to the bottom plate 31 . For example, the first direction may be an x direction.
[0083] Along the first direction, the length of the first sub-beam 331 may be less than or equal to the length of the second sub-beam 332 .
[0084] The first sub-beam 331 is used to define the first accommodating cavity 310. That is, when a battery cell 20 is disposed within the box body 30, the first sub-beam 331 is closer to the battery cell 20 than the second sub-beam 332. For example, the first sub-beam 331 can be directly connected to or in contact with the battery cell 20, or can be indirectly connected to or in contact with the battery cell 20 via a partition, thermal management component, etc.
[0085] The second sub-beam 332 is farther away from the first accommodation cavity 310 than the first sub-beam 331 . For example, the second sub-beam 332 can be used to prevent external impact from damaging the battery cells 20 and other components in the box body 30 .
[0086] The connecting sub-beam 333 connects the first sub-beam 331 and the second sub-beam 332, wherein the connecting sub-beam 333 can directly connect the first sub-beam 331 and the second sub-beam 332; alternatively, the connecting sub-beam 333 can directly connect the first sub-beam 331, and when the first sub-beam 331 is subjected to the expansion force of the battery cell 20, under the action of the force, the connecting sub-beam 333 is connected or abutted against the second sub-beam 332.
[0087] Because the connecting sub-beam 333 connects the first sub-beam 331 and the second sub-beam 332, when the first sub-beam 331 is subjected to an expansion force, the force is transferred from the first sub-beam 331 to the second sub-beam 332 via the connecting sub-beam 333, thereby reducing and distributing the expansion force on the first sub-beam 331. As a whole, the first sub-beam 331, the second sub-beam 332, and the connecting sub-beam 333 can better resist the expansion force than a single beam alone. In other words, the provision of the connecting sub-beam 333 disperses the expansion force on the first sub-beam 331, eliminating the need for a bulky and heavy first sub-beam 331 to resist the expansion force of the battery cell 20.
[0088] In the embodiment of the present application, the housing 30 includes a bottom plate 31 and a frame 32. The frame 32 is disposed around the bottom plate 31 and defines a first accommodating cavity 310 with the bottom plate 31. The first accommodating cavity 310 is used to accommodate the battery cells 20. The frame 32 includes a first beam 33. The first beam 33 includes a first sub-beam 331, a second sub-beam 332, and a connecting sub-beam 333. The first sub-beam 331 and the second sub-beam 332 extend along a first direction. The first sub-beam 331 defines the first accommodating cavity 310. The second sub-beam 332 is spaced apart from the first accommodating cavity 310 relative to the first sub-beam 331. The connecting sub-beam 333 connects the first sub-beam 331 and the second sub-beam 332. In this way, when the first sub-beam 331 is subjected to the expansion force of the battery cell 20, the force can be dispersed to the second sub-beam 332 through the connecting sub-beam 333, and the first sub-beam 331 does not need to be set with a larger volume and weight to maintain a higher structural strength to resist the expansion force. Therefore, the box body 30 of the present application can improve the volume energy density and weight energy density of the battery.
[0089] In an embodiment of the present application, the connecting sub-beam 333 at least connects the non-end regions of the first sub-beam 331 and the second sub-beam 332 in the first direction.
[0090] The non-end regions of the first sub-beam 331 and the second sub-beam 332 in the first direction may refer to regions of the first sub-beam 331 and the second sub-beam 332 in the first direction except for the ends, and the ends may refer to the two end points of the first sub-beam 331 and the second sub-beam 332 in the first direction.
[0091] The connecting sub-beam 333 at least connects the non-end areas of the first sub-beam 331 and the second sub-beam 332 in the first direction, that is, the connecting sub-beam 333 connects the non-end areas of the first sub-beam 331 and the second sub-beam 332 in the first direction. The connecting sub-beam 333 may or may not connect the ends of the first sub-beam 331 and the second sub-beam 332 in the first direction.
[0092] When the first sub-beam 331 is subjected to an expansion force, the first sub-beam 331 bulges away from the first accommodating cavity 310. For example, the first sub-beam 331 bulges away from the first accommodating cavity 310 in the y-direction, and the bulge is more pronounced at the non-end region of the first direction of the first sub-beam 331 than at the end region. Providing the connecting sub-beam 333 to connect at least the non-end regions of the first direction of the first sub-beam 331 and the second sub-beam 332 facilitates better dispersal of the expansion force to the second sub-beam 332 via the connecting sub-beam 333.
[0093] In one embodiment of the present application, along the second direction, the size of the connecting sub-beam 333 is smaller than that of the first sub-beam 331; and / or the size of the connecting sub-beam 333 is smaller than that of the second sub-beam 332, and the second direction is perpendicular to the bottom plate 31. This helps reduce the volume and weight of the connecting sub-beam 333, thereby improving the volumetric energy density and weight energy density of the battery.
[0094] The second direction is perpendicular to the bottom plate 31 and may be the z direction in the figure.
[0095] Figure 5 is a top view of the box body according to one embodiment of the present application, Figure 6 is a cross-sectional view of the box body along line AA in Figure 5 , and Figure 7 is an enlarged schematic diagram of area B in Figure 6 . In one embodiment of the present application, as shown in Figures 5 to 7 , a connecting sub-beam 333 is disposed at one end of the first sub-beam 331 along the second direction, closer to the base plate 31. This facilitates the processing and forming of the first beam 33.
[0096] In one embodiment of the present application, the connecting sub-beam 333 extends continuously in the first direction to the ends of the first sub-beam 331 and the second sub-beam 332 in the first direction. This helps the connecting sub-beam 333 better transfer the expansion force exerted on the first sub-beam 331 to the second sub-beam 332, thereby further dissipating the expansion force exerted on the first sub-beam 331.
[0097] Figure 8 is a schematic structural diagram of the first beam according to an embodiment of the present application, and Figure 9 is a cross-sectional view of the first beam along the CC direction in Figure 8. In an embodiment of the present application, as shown in Figures 8 and 9 , the connecting sub-beam 333 is disposed in the middle region of the first sub-beam 331 along the second direction.
[0098] The middle region may be a non-end region of the first sub-beam 331 along the second direction, or may be a middle region of the first sub-beam 331 along the second direction.
[0099] By arranging the connecting sub-beam 333 in the middle portion of the first sub-beam 331 along the second direction, the expansion force exerted on the first sub-beam 331 can be more evenly distributed to the second sub-beam 332 through the connecting sub-beam 333 .
[0100] In one embodiment of the present application, as shown in Figures 8 and 9 , the first beam 33 includes a plurality of connecting sub-beams 333 , which are spaced apart in the first direction. This allows for flexible positioning and number of the connecting sub-beams 333 according to actual needs.
[0101] In one embodiment of the present application, the first beam 33 is an integrally formed structure. This helps reduce the number of processing steps and facilitates the processing of the first beam 33. For example, the first sub-beam 331, the second sub-beam 332, and the connecting sub-beam 333 are all made of aluminum, and the first beam 33 can be formed by integral extrusion.
[0102] In some embodiments, the first sub-beam 331 and the connecting sub-beam 333 are an integrally formed structure, and the integrally formed structure is connected to the second sub-beam 332 by welding.
[0103] Figure 10 is a schematic diagram of the structure of the first beam according to one embodiment of the present application. In some embodiments, as shown in Figure 10 , a connecting sub-beam 333 is disposed in the middle region of the first sub-beam 331 in the second direction. The connecting sub-beam 333 extends continuously in the first direction to the ends of the first and second sub-beams 331 and 332 in the first direction. This structure allows the first beam 33 to be formed in one piece, which not only facilitates processing but also provides resistance to the expansion force of the battery cells 20.
[0104] In one embodiment of the present application, the connecting sub-beam 333 is connected to the first sub-beam 331 and / or the second sub-beam by welding 332. This allows for flexible selection of the connection method between the connecting sub-beam 333 and the first sub-beam 331 or the second sub-beam 332 based on the structure of the first beam 33. For example, for a first beam 33 with multiple connecting sub-beams 333 spaced apart along the first direction, welding the first sub-beam 331 and / or the second sub-beam 332 is simpler and more convenient.
[0105] The connecting sub-beam 333, the first sub-beam 331 and the second sub-beam 332 can be formed separately and then connected together by welding; the connecting sub-beam 333 can be integrally formed with the first sub-beam 331 and then welded to the second sub-beam 332; the connecting sub-beam 333 can also be integrally formed with the second sub-beam 332 and then welded to the first sub-beam 331.
[0106] In one embodiment of the present application, referring to Figure 7, along the second direction z, the dimensions of the second sub-beam 332, the first sub-beam 331 and the battery cell 20 satisfy: h≥k≥n; wherein h is the dimension of the second sub-beam 332 along the second direction, k is the dimension of the first sub-beam 331 along the second direction, and n is the dimension of the battery cell 20 along the second direction, and the second direction is perpendicular to the bottom plate 31.
[0107] The dimension h of the second sub-beam 332 along the second direction is the maximum dimension of the second sub-beam 332 along the second direction, that is, the maximum value of the projection of the second sub-beam 332 in the z-direction on a plane parallel to the second direction, such as the yoz plane. Similarly, the dimension k of the first sub-beam 331 along the second direction is the maximum dimension of the first sub-beam 331 along the second direction, and the dimension n of the battery cell 20 along the second direction is the maximum dimension of the battery cell 20 along the second direction.
[0108] In this embodiment, along the second direction, the size of the second sub-beam 332 is greater than or equal to the size of the first sub-beam. The second sub-beam 332 can effectively protect the battery cells and other components inside the box 30, and prevent external impacts, vibrations, etc. from affecting the battery cells or other components inside the box; along the second direction, the size of the first sub-beam 331 is greater than or equal to the size of the battery cell 20, which can more effectively resist the expansion force of the battery cell 20.
[0109] In some embodiments, along the second direction, the first sub-beam 331 and the battery cell 20 have the same size, and a 2 mm processing error may exist between the size relationship between the first sub-beam 331 and the battery cell 20 .
[0110] In one embodiment of the present application, along the second direction, the dimensions of the connecting sub-beam 333 and the first sub-beam 331 satisfy the following: 2k / 3 ≥ p ≥ k / 5; where k is the dimension of the first sub-beam 331 along the second direction, and p is the dimension of the connecting sub-beam 333 along the second direction, with the second direction being perpendicular to the base plate 31. This ensures that the connecting sub-beam 333 effectively transmits and distributes the force acting on the first sub-beam 331 to the second sub-beam 332, thereby ensuring the first beam 33's ability to resist the expansion force of the battery cells 20, while also preventing the connecting sub-beam 333 from being too large and occupying too much space.
[0111] The dimension p of the connecting sub-beam 333 along the second direction is the maximum dimension of the connecting sub-beam 333 along the second direction, that is, the maximum value of the projection of the connecting sub-beam 333 on a plane parallel to the second direction, such as the yoz plane, in the z direction.
[0112] In one embodiment of the present application, along the second direction, the dimensions of the connecting sub-beam 333 and the first sub-beam 331 satisfy: p=k / 3±5 mm. This can further balance the effect of the first beam 33 in resisting the expansion force and the volume of the connecting sub-beam 333.
[0113] In one embodiment of the present application, a cavity 334 is provided inside at least one of the first sub-beam 331, the second sub-beam 332, and the connecting sub-beam 333. This helps reduce the weight of the first beam 33, thereby improving the weight energy density of the battery.
[0114] In some embodiments, along the second direction, the first sub-beam 331 is provided with a plurality of cavities 334 . The shape of the cavities 334 can be specifically set according to actual conditions, for example, it can be set to a square, a diamond, an irregular polygon, etc. Similarly, the second sub-beam 332 and the connecting sub-beam 333 can also be provided with a plurality of cavities 334 .
[0115] In one embodiment of the present application, the thickness t of the wall forming the cavity 334 is 0.5 mm to 5 mm. Setting the thickness of the wall forming the cavity 334 to 0.5 mm to 5 mm can prevent insufficient structural strength of the cavity 334 or the first beam 33 due to a thin wall, and can also prevent increased weight of the first beam 33 due to a thick wall.
[0116] The thickness t of the wall forming the cavity 334 may be the maximum thickness of the wall forming the cavity 334 .
[0117] In some embodiments, the thickness t of the wall forming the cavity 334 is 0.5 mm to 5 mm, and t can be 0.5 mm, 1 mm, 1.5 mm, 1.8 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, etc.
[0118] In one embodiment of the present application, the thickness of the wall forming the cavity is 1 to 3 mm, so as to further balance the structural strength and weight of the first beam 33 .
[0119] In some embodiments, the thickness of the walls forming the cavity is 2 mm.
[0120] Figure 11 is a schematic diagram of the structure of the box according to one embodiment of the present application, and Figure 12 is an enlarged schematic diagram of area D in Figure 11. In one embodiment of the present application, as shown in Figures 10, 11, and 12, the first sub-beam 331, the connecting sub-beam 333, and the second sub-beam 332 collectively define a second accommodating cavity 320, which is used to accommodate the connecting assembly 50 connected to the battery cell 20.
[0121] The number of second accommodating cavities 320 in the first beam 33 is related to the arrangement of the connecting sub-beam 333. For example, when the connecting sub-beam 333 extends along the first direction to the end of the first sub-beam 331 in the first direction, and is arranged in the middle of the first sub-beam 331 in the second direction, there may be two accommodating cavities 320. When the connecting sub-beam 333 extends along the first direction to the end of the first sub-beam 331 in the first direction, and is arranged at the end of the first sub-beam 331 in the second direction close to the bottom plate 31, there may be one accommodating cavity 320.
[0122] The connection assembly 50 may include a high-voltage wiring harness, a low-voltage wiring harness, a battery management system (BMS) or its components, or power output components connected to the battery cells 20. For example, the high-voltage wiring harness can be placed in the second accommodating cavity 320, eliminating the need for additional space in the housing 30 for its installation. Furthermore, the high-voltage wiring harness is also contained in a neatly organized space, making it easier to repair, replace, and locate. Similarly, multiple components of the BMS can also be placed in the second accommodating cavity 320.
[0123] By arranging the connecting component 50 in the second accommodating cavity 320 , on the one hand, it is beneficial to improve the space utilization of the box body 30 , and on the other hand, it is beneficial to make the arrangement of the connecting component 50 more neat and regular.
[0124] Figure 13 is a schematic diagram of the housing structure of one embodiment of the present application, Figure 14 is an enlarged schematic diagram of area E in Figure 13, and Figure 15 is a cross-sectional view of the housing along the FF direction in Figure 13. In one embodiment of the present application, as shown in Figures 13 to 15, a fixing assembly 350 is disposed within the second accommodating cavity 320. The fixing assembly 350 is used to secure the connecting assembly 50 to the second accommodating cavity 320. This facilitates securing the connecting assembly 50 within the second accommodating cavity 320 and prevents the connecting assembly 50 from becoming detached from the second accommodating cavity 320 due to factors such as shaking.
[0125] In one embodiment of the present application, the fixing assembly 350 is disposed on a wall forming the second accommodating cavity 320. In this way, the space of the second accommodating cavity 320 can be fully utilized, further improving the space utilization rate of the box body 30.
[0126] Figure 16 is a top view of region D in Figure 11 , and Figure 17 is a cross-sectional view taken along the VV direction in Figure 16 . In some embodiments, as shown in Figures 16 and 17 , the fixing assembly 350 includes an adhesive 351 disposed on a wall forming the second accommodating cavity 320 . For example, the adhesive 351 is disposed on the wall of the first sub-beam 331 facing the second accommodating cavity 320 . The first surface of the adhesive 351 is bonded to the first sub-beam 331 , and the second surface of the adhesive 351 is bonded to the connecting assembly 50 . The first and second surfaces are disposed opposite each other along the y-direction.
[0127] The adhesive member 351 may be a sticky foam or a double-sided tape, as long as it can adhere the connecting component 50 to the wall forming the second accommodating cavity 320 . This embodiment of the present application does not impose any specific restrictions on this.
[0128] In some embodiments, the adhesive member 351 may be disposed on a wall of the second sub-beam 332 or the connecting sub-beam 333 that faces or forms the second accommodating cavity 320 .
[0129] In some embodiments, the fixing assembly 350 includes a clamp 352, which is fixedly connected to the connecting sub-beam 333 and is used to confine the connecting assembly 50 within the clamp 352. The clamp 352 may include an annular body portion 3521 and a protrusion 3522 protruding from the body portion 3521. A first hole 333a is provided on the surface of the connecting sub-beam 333 facing the second accommodating cavity 320. The protrusion 3522 is used to snap into the first hole 333a. The body portion 3521 is used to fix the connecting assembly 50 within the annular body portion 3521.
[0130] The clamp 352 may be disposed on a wall forming the second accommodating cavity 320 . In some embodiments, the clamp 352 may also be disposed on a wall facing the first sub-beam 331 or the second sub-beam 332 or forming the second accommodating cavity 320 .
[0131] In one embodiment of the present application, the housing 30 includes two first beams 33 disposed along a third direction. The two first beams 33 are disposed at both ends of the housing 30 along the third direction. The third direction is perpendicular to the first direction and parallel to the bottom plate 31. Thus, the two first beams 33 disposed at both ends of the third direction can more effectively resist the expansion of the battery cells 20.
[0132] The third direction may be the y direction in the figure.
[0133] In some embodiments, the two first beams 33 disposed at both ends of the third direction have the same structure.
[0134] Figure 18 is a schematic diagram of the structure of a box body according to an embodiment of the present application. In some embodiments, as shown in Figure 18 , the box body 30 includes two first beams 33 arranged along the third direction, and the two first beams 33 have different structures.
[0135] The box body 30 further includes two second beams 34 arranged opposite to each other along the first direction. The second beams 34 extend along the third direction and are connected end to end with the first beams 33 to form a frame 32 .
[0136] As shown in Figure 18, the second sub-beams 332 in the two first beams 33 have different structures. The second sub-beam 332 in one first beam 33 is a single unit extending along the first direction, while the second sub-beam 332 in the other first beam 33 includes a main portion 3321 and a connecting portion 3322. The main portion 3321 extends along the first direction, and the connecting portion 3322 connects the end of the main portion 3321 along the first direction to the second beam 34. The connecting portion 3322 is arranged at an acute angle to the first sub-beam 331. That is, the first end 3322a of the connecting portion 3322 is connected to the second beam 34, and the second end 3322b is connected to the main portion 3321. The distance between the connecting portion 3322 and the first sub-beam 331 in the third direction gradually increases from the first end 3322a toward the second end 3322b. In other words, along the third direction, the second sub-beam 332 protrudes away from the first accommodating cavity 310.
[0137] In some embodiments, in the other first beam 33 , the connecting sub-beam 333 is disposed between the main body 3321 and the first sub-beam 331 .
[0138] In some embodiments, in the other first beam 33 , the connecting sub-beam 333 connects the main body 3321 and the first sub-beam 331 .
[0139] In the other first beam 33 , the connecting sub-beam 333 is welded to the first sub-beam 331 and the second sub-beam 332 .
[0140] In some embodiments, the box body 30 includes three first beams 33 , two of which are respectively disposed at two ends of the box body 30 along the third direction, and another first beam 33 is disposed between the other two first beams 33 in the third direction.
[0141] In one embodiment of the present application, the first direction is parallel to the surface with the largest surface area of the battery cell 20. In this way, the first sub-beam 331 is disposed opposite to the surface with the largest surface area of the battery cell 20, which can more effectively resist the expansion of the battery cell 20.
[0142] The first sub-beam 331 is arranged opposite to the surface with the largest surface area of the battery cell 20. The first sub-beam 331 can be directly connected or directly abutted to the surface with the largest surface area of the battery cell 20, or the first sub-beam 331 can be indirectly connected or abutted to the surface with the largest surface area of the battery cell 20 or through other components (partitions, thermal management components).
[0143] In one embodiment of the present application, the connecting sub-beam 333 is disposed in the first direction at the center of the surface with the largest surface area of the battery cell 20. In this way, the connecting sub-beam 333 can more effectively transfer and disperse the expansion force exerted on the first sub-beam 331 to the second sub-beam 332.
[0144] In one embodiment of the present application, the connecting sub-beam 333 is perpendicular to the first sub-beam 331 and the second sub-beam 332. This facilitates the installation of the connecting sub-beam 333 and the transmission of the expansion force.
[0145] In one embodiment of the present application, referring to FIG. 7 , along the third direction, a dimension s1 of the connecting sub-beam 333 is 5 mm to 500 mm, and the third direction is perpendicular to the first direction and parallel to the bottom plate.
[0146] The dimension s1 of the connecting sub-beam 333 along the third direction is the maximum dimension of the connecting sub-beam 333 along the third direction, that is, the maximum value of the projection of the connecting sub-beam 333 on a plane parallel to the third direction, for example, the yoz plane, along the y direction.
[0147] In some embodiments, along the third direction, the size of the connecting sub-beam 333 can be 5mm, 20mm, 30mm, 40mm, 50mm, 100mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, etc.
[0148] In this way, it is possible to avoid the connection sub-beam 333 being too long in the third direction and occupying too much space, and to avoid the connection sub-beam 333 being too short in the third direction and being difficult to process.
[0149] In one embodiment of the present application, referring to FIG7 , along the third direction, the dimension s1 of the connecting sub-beam 333 is 30 mm to 40 mm, so as to further balance the convenience of production and processing with the volume of the connecting sub-beam 333 .
[0150] In some embodiments, along the third direction, the dimension of the connecting sub-beam 333 is 35 mm.
[0151] In one embodiment of the present application, the dimension s2 of the first sub-beam 331 along the third direction is 10 mm to 50 mm. The third direction is perpendicular to the first direction and parallel to the bottom plate. This avoids the problem of the first sub-beam 331 being too small in the third direction, resulting in insufficient strength to resist the expansion force of the battery cell 20, and the problem of the first sub-beam 331 being too large in the third direction, resulting in a reduced volumetric energy density of the battery.
[0152] The dimension s2 of the first sub-beam 331 along the third direction is the maximum dimension of the first sub-beam 331 along the third direction, that is, the maximum value of the projection of the first sub-beam 331 on a plane parallel to the third direction, for example, the yoz plane, along the y direction.
[0153] In some embodiments, along the third direction, the size of the first sub-beam 331 may be 10 mm, 15 mm, 18 mm, 20 mm, 25 mm, 30 mm, 35 mm, 45 mm, 50 mm, etc.
[0154] In one embodiment of the present application, along the third direction, the dimension s2 of the first sub-beam 331 is 18 mm to 22 mm. In this way, both the volume energy density of the battery and the structural strength of the first beam 331 can be further considered.
[0155] In some embodiments, the dimension of the first sub-beam 331 in the third direction is 20 mm.
[0156] In one embodiment of the present application, the dimension s3 of the second sub-beam 332 along the third direction is 10 mm to 50 mm, and the third direction is perpendicular to the first direction and parallel to the bottom plate. In this way, both the structural strength of the second sub-beam 332 and the volume energy density of the battery can be taken into account.
[0157] The dimension s3 of the second sub-beam 332 along the third direction is the maximum dimension of the second sub-beam 332 along the third direction, that is, the maximum value of the projection of the second sub-beam 332 on a plane parallel to the third direction, for example, the yoz plane, along the y direction.
[0158] In some embodiments, along the third direction, the size of the second sub-beam 332 may be 10 mm, 15 mm, 20 mm, 22 mm, 25 mm, 30 mm, 35 mm, 45 mm, 50 mm, etc.
[0159] In one embodiment of the present application, along the third direction, the dimension s3 of the second sub-beam 332 is 20 mm to 24 mm, so as to further balance the structural strength of the second sub-beam 332 and the volume energy density of the battery.
[0160] In some embodiments, the dimension of the second sub-beam 332 in the third direction is 22 mm.
[0161] In one embodiment of the present application, referring to Figure 3, the box body 30 also includes a second beam 34, which extends along a third direction and is connected to the end of the first beam 33 along the first direction to form a frame 32. The third direction is perpendicular to the first direction and parallel to the bottom plate 31.
[0162] The box 30 includes two second beams 34, each extending along a third direction, such as the y-direction, and arranged opposite each other along a first direction, such as the x-direction. The box 30 also includes two first beams 33 arranged opposite each other along the third direction. The first beams 33 and the second beams 34 are connected end-to-end to form a frame 32.
[0163] By providing the second beams 34 , the first beams 33 and the second beams 34 can be combined to form a frame 32 , thereby protecting the battery cells 20 in the box body 30 .
[0164] In one embodiment of the present application, the first beam 331 is connected to the second beam 34 by welding. This connection method is easy to operate and helps to save processing time.
[0165] In one embodiment of the present application, an end portion along the first direction of at least one of the first sub-beam 331 , the second sub-beam 332 , and the connecting sub-beam 333 of the first beam 33 is welded to the second beam 34 .
[0166] In a possible implementation of this embodiment, the end of the second sub-beam 332 along the first direction is welded to the second beam 34, and the first sub-beam 331 and the connecting sub-beam 333 are not welded to the second beam 34. This is beneficial to saving processing steps, thereby saving processing time and reducing production costs.
[0167] In one possible implementation of this embodiment, the ends of the first sub-beam 331 and the second sub-beam 332 along the first direction are both welded to the second beam 34, while the connecting sub-beam 333 is not welded to the second beam 34. When the battery cell 20 expands, the first sub-beam 331 is subjected to the expansion force of the battery cell 20. Because the first sub-beam 331 is welded to the second beam 34, the second beam 34 can partially disperse the expansion force on the first sub-beam 331. Furthermore, the connection strength between the first beam 33 and the second beam 34 can be further enhanced.
[0168] In a possible implementation of this embodiment, the ends of the first sub-beam 331 , the second sub-beam 332 and the connecting sub-beam 333 along the first direction are all welded to the second beam 34 , so that the connection strength between the first beam 33 and the second beam 34 can be enhanced.
[0169] By arranging the ends of at least one of the first sub-beam 331, the second sub-beam 332, and the connecting sub-beam 333 of the first beam 33 to be welded to the second beam 34 along the first direction, the connection method between the first beam 33 and the second beam 34 can be flexibly set according to actual needs, thereby facilitating the flexible setting of the connection strength between the first beam 33 and the second beam 34 and the convenience of production and processing.
[0170] In one embodiment of the present application, the bottom plate 31 is connected to the frame 32 by welding or riveting. In this way, the connection mode between the bottom plate 31 and the frame 32 can be flexibly set according to actual needs.
[0171] During the assembly of the box body 30 , the first beam 33 and the second beam 34 may be welded together to form the frame 32 , and then the frame 32 and the bottom plate 31 may be connected by welding or riveting.
[0172] The bottom plate 31 may be connected to the frame 32 by welding. For example, one side of the frame 32 along the second direction close to the bottom plate is welded to the bottom plate 31 .
[0173] The bottom plate 31 may also be welded to a portion of the frame 32 and riveted to another portion of the frame 32. For example, the second sub-beam 332 of the first beam 33 is welded to the bottom plate 31, and the connecting sub-beam 333 is riveted to the bottom plate 31.
[0174] In some embodiments, the connecting sub-beam 333 includes a first portion 3331 and a second portion 3332, which are connected along a third direction. The first portion 3331 contacts the bottom plate 31 in the second direction, and the second portion 3332 protrudes away from the bottom plate 31 in the second direction. In other words, a gap 3333 is defined between the second portion 3332 and the bottom plate 31 in the second direction. The gap 3333 is used to accommodate a sealing gasket, which may be an annular sealing gasket. During assembly of the box body 30, the sealing gasket can be first placed on the bottom plate 31 at a position corresponding to the gap 3333, and then the frame 32 and the bottom plate 31 can be welded together.
[0175] Figure 19 is a schematic diagram of the structure of a box according to one embodiment of the present application. In some embodiments, as shown in Figure 19, the box 30 includes a first beam 33, two second beams 34, and a third beam 36. The first beam 33, the second beam 34, the third beam 36, and the second beam 34 are sequentially connected to form the frame 32 of the box 30. The first beam 33 is an integrally formed structure.
[0176] As shown in FIG19 , along the third direction, the third beam 36 protrudes in a direction away from the first accommodating cavity 310. The third beam 36 includes a straight portion 363, a first connecting portion 361, and a second connecting portion 362. The straight portion 363 extends along the first direction. The first connecting portion 361 connects one end of the straight portion 363 along the first direction to the second beam 34, and the first connecting portion 361 and the second beam 34 are arranged at an obtuse angle. The second connecting portion 362 connects the other end of the straight portion 363 along the first direction to the second beam 34, and the second connecting portion 362 and the second beam 34 are arranged at an obtuse angle.
[0177] The box body 30 further includes a fourth beam 35 , which is used to define the first accommodation cavity 310 and extends along the first direction. When the battery cell 20 expands, the fourth beam 35 and the first beam 33 can both be used to resist the expansion force of the battery cell 20 .
[0178] The embodiment of the present application provides a housing 30, which includes a bottom plate 31 and a frame 32. The frame 32 is disposed around the bottom plate 31 and defines a first accommodating cavity 310 with the bottom plate 31. The first accommodating cavity 310 is used to accommodate a battery cell 20. The frame 32 includes a first beam 33, which includes a first sub-beam 331, a second sub-beam 332, and a connecting sub-beam 333. The first sub-beam 331 and the second sub-beam 332 extend along a first direction. The first sub-beam 331 defines the first accommodating cavity 310. The second sub-beam 332 is spaced apart from the first accommodating cavity 310 relative to the first sub-beam 331. The connecting sub-beam 333 connects the first sub-beam 331 and the second sub-beam 332. The connecting sub-beam 333 extends continuously in the first direction to the ends of the first sub-beam 331 and the second sub-beam 332 in the first direction. The first beam 33 is an integrally formed structure. In this way, when the first sub-beam 331 is subjected to the expansion force of the battery cell 20, the force can be dispersed to the second sub-beam 332 through the connecting sub-beam 333. As a result, the first sub-beam 331 does not need to be large and heavy to maintain high structural strength to resist the expansion force. Therefore, the box 30 of the present application can improve the volumetric energy density and weight energy density of the battery. In addition, the first beam 33 is a one-piece molded structure, which facilitates the processing of the first beam 33, helps save processing time, and improves processing convenience.
[0179] It should be understood that the relevant parts in the various embodiments of the present application can refer to each other and will not be repeated for the sake of brevity.
[0180] FIG20 is a schematic diagram of the structure of a battery according to an embodiment of the present application. The present application provides a battery 10 , as shown in FIG20 , comprising a battery cell 20 , a housing 30 and a cover 40 .
[0181] The box body 30 may be any box body in the above embodiments, and the box body 30 is used to accommodate the battery cells 20 .
[0182] To meet varying power requirements, the battery 10 may include multiple battery cells. Multiple battery cells 20 are connected in parallel, series, or in a hybrid configuration and then placed within the housing 30. The number of battery cells 20 can be set to any value based on varying power requirements. Multiple battery cells 20 can be connected in series, parallel, or in a hybrid configuration to achieve greater capacity or power.
[0183] For ease of installation, battery cells 20 can be arranged in groups, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set as needed. A battery can include multiple battery modules, which can be connected in series, parallel, or in a hybrid manner.
[0184] The cover portion 40 is used to cover the box body 30 to seal the battery cells 20 in the box body 30 .
[0185] The cover portion 40 can be a flat plate or an upper box with a certain accommodating space, which can be specifically configured according to the arrangement of the battery cells 20. The shape of the cover portion 40 can be circular, square or polygonal, and the shape of the cover portion 40 is adapted to the shape of the box 30.
[0186] The cover portion 40 may be connected to the box body 30 by welding, riveting, or the like.
[0187] The present application provides an electrical device, comprising the above-mentioned battery 10, and the battery 10 is used to supply power to the electrical device.
[0188] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.
Claims
1. A box (30), wherein: include: Bottom plate (31); A frame (32), the frame (32) is arranged on the periphery of the bottom plate (31) and defines a first accommodating cavity (310) with the bottom plate (31), the first accommodating cavity (310) being used to accommodate a battery cell (20); wherein, The frame (32) includes a first beam (33), the first beam (33) includes a first sub-beam (331), a second sub-beam (332) and a connecting sub-beam (333), the first sub-beam (331) and the second sub-beam (332) extend along a first direction, the first sub-beam (331) is used to define the first accommodating cavity (310), the second sub-beam (332) is away from the first accommodating cavity (310) relative to the first sub-beam (331), and the connecting sub-beam (333) connects the first sub-beam (331) and the second sub-beam (332).
2. The box (30) according to claim 1, wherein The connecting sub-beam (333) at least connects the non-end regions of the first sub-beam (331) and the second sub-beam (332) in the first direction.
3. The box (30) according to claim 1 or 2, wherein: Along the second direction, the size of the connecting sub-beam (333) is smaller than the size of the first sub-beam (331); and / or, The size of the connecting sub-beam (333) is smaller than the size of the second sub-beam (332), and the second direction is perpendicular to the bottom plate (31).
4. The box (30) according to claim 3, wherein: The connecting sub-beam (333) is arranged at one end of the first sub-beam (331) along the second direction and close to the bottom plate (31).
5. The box (30) according to claim 3 or 4, wherein: The connecting sub-beam (333) extends continuously in the first direction to ends of the first sub-beam (331) and the second sub-beam (332) in the first direction.
6. The box (30) according to claim 3, wherein: The connecting sub-beam (333) is arranged in a middle area of the first sub-beam (331) along the second direction.
7. The box (30) according to any one of claims 1 to 6, wherein: The first beam (33) includes a plurality of connecting sub-beams (333), and the plurality of connecting sub-beams (333) are spaced apart in the first direction.
8. The box (30) according to any one of claims 1 to 7, wherein: The first beam (33) is an integrally formed structure.
9. The box (30) according to any one of claims 1 to 7, wherein: The connecting sub-beam (333) is welded to the first sub-beam (331) and / or the second sub-beam (332).
10. The box (30) according to any one of claims 1 to 9, wherein: Along the second direction, the sizes of the second sub-beam (332), the first sub-beam (331) and the battery cell (20) satisfy: h≥k≥n; wherein h is the size of the second sub-beam (332) along the second direction, k is the size of the first sub-beam (331) along the second direction, and n is the size of the battery cell (20) along the second direction, and the second direction is perpendicular to the bottom plate (31).
11. The box (30) according to any one of claims 1 to 10, wherein: Along the second direction, the dimensions of the connecting sub-beam (333) and the first sub-beam (331) satisfy: 2k / 3≥p≥k / 5; wherein k is the dimension of the first sub-beam (331) along the second direction, and p is the dimension of the connecting sub-beam (333) along the second direction, and the second direction is perpendicular to the base plate (31).
12. The box (30) according to claim 11, wherein: Along the second direction, the dimensions of the connecting sub-beam (333) and the first sub-beam (331) satisfy: p=k / 3±5 mm.
13. The box (30) according to any one of claims 1 to 12, wherein: A cavity (334) is provided inside at least one of the first sub-beam (331), the second sub-beam (332) and the connecting sub-beam (333).
14. The box (30) according to claim 13, wherein: The thickness of the wall forming the cavity (334) is 0.5 mm to 5 mm.
15. The box (30) according to claim 14, wherein: The thickness of the wall forming the cavity (334) is 1 to 3 mm.
16. The box (30) according to any one of claims 3 to 15, wherein: The first sub-beam (331), the connecting sub-beam (333) and the second sub-beam (332) jointly define a second accommodating cavity (320), and the second accommodating cavity (320) is used to accommodate a connecting assembly (50) connected to the battery cell (20).
17. The housing (30) according to claim 16, wherein: A fixing assembly (350) is provided in the second accommodating cavity (320), and the fixing assembly (350) is used to fix the connecting assembly (50) to the second accommodating cavity (320).
18. The housing (30) according to claim 17, wherein: The fixing assembly (350) is arranged on a wall forming the second accommodating cavity (320).
19. The box (30) according to any one of claims 1 to 18, wherein: The box body (30) comprises two first beams (33) arranged along a third direction, wherein the two first beams (33) are respectively arranged at two ends of the box body (30) along the third direction, and the third direction is perpendicular to the first direction and parallel to the bottom plate (31).
20. The box (30) according to any one of claims 1 to 19, wherein: The first direction is parallel to the surface of the battery cell (20) with the largest surface area.
21. The box (30) according to any one of claims 1 to 20, wherein: In the first direction, the connecting sub-beam (333) is arranged corresponding to the center of the surface of the battery cell (20) with the largest surface area.
22. The box (30) according to any one of claims 1 to 21, wherein: The connecting sub-beam (333) is perpendicular to the first sub-beam (331) and the second sub-beam (332).
23. The box (30) according to any one of claims 1 to 22, wherein: Along a third direction, the size of the connecting sub-beam (333) is 5 mm to 500 mm, and the third direction is perpendicular to the first direction and parallel to the bottom plate (31).
24. The housing (30) according to claim 23, wherein: Along the third direction, the size of the connecting sub-beam (333) is 30 mm to 40 mm.
25. The box (30) according to any one of claims 1 to 24, wherein: Along a third direction, the size of the first sub-beam (331) is 10 mm to 50 mm, and the third direction is perpendicular to the first direction and parallel to the bottom plate (31).
26. The housing (30) according to claim 25, wherein: Along the third direction, the size of the first sub-beam (331) is 18 mm to 22 mm.
27. The box (30) according to any one of claims 1 to 26, wherein: Along a third direction, the size of the second sub-beam (332) is 10 mm to 50 mm, and the third direction is perpendicular to the first direction and parallel to the bottom plate (31).
28. The housing (30) according to claim 27, wherein: Along the third direction, the size of the second sub-beam (332) is 20 mm to 24 mm.
29. The box (30) according to any one of claims 1 to 28, wherein: The box body (30) further includes a second beam (34) extending along a third direction and connected to an end of the first beam (33) along the first direction to form the frame (32), wherein the third direction is perpendicular to the first direction and parallel to the bottom plate (31).
30. The housing (30) according to claim 29, wherein: The first beam (33) and the second beam (34) are connected by welding.
31. The housing (30) according to claim 30, wherein: An end portion along the first direction of at least one of the first sub-beam (331), the second sub-beam (332), and the connecting sub-beam (333) of the first beam (33) is welded to the second beam (34).
32. The box (30) according to any one of claims 1 to 31, wherein: The bottom plate (31) and the frame (32) are connected by welding or riveting.
33. A battery (10) wherein: include: Battery cell (20); The box (30) according to any one of claims 1 to 32, wherein the box (30) is used to accommodate the battery cell (20); A cover plate portion (40), wherein the cover plate portion (40) is used to cover the box body (30).
34. An electrical device, wherein: The invention comprises a battery (10) as claimed in claim 33, wherein the battery (10) is used to supply power to the electrical device.