Box, battery and vehicle

Abstract

The present application provides a box, a battery and a vehicle. The box is used for a battery. The box includes a load-bearing plate and a reinforcing beam. The load-bearing plate is used to fix the battery cell. The reinforcing beam is arranged on the side of the load-bearing plate away from the battery cell and is fixed to the load-bearing plate. The present application provides a reinforcing beam on the side of the load-bearing plate away from the battery cell to improve the anti-extrusion ability of the load-bearing plate, reduce the deformation of the load-bearing plate when the battery is subjected to external impact, reduce the risk of the load-bearing plate crushing the battery cell, and improve the safety of the battery.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a housing, a battery, and a vehicle. Background Technology

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. Battery cells can include nickel-cadmium battery cells, nickel-metal hydride battery cells, lithium-ion battery cells, and rechargeable alkaline zinc-manganese battery cells, among others.

[0003] In the development of battery technology, improving battery safety has always been a research direction. Summary of the Invention

[0004] This application provides a housing, a battery, and a vehicle that can improve battery safety.

[0005] In a first aspect, embodiments of this application provide a housing for a battery. The housing includes a support plate and reinforcing beams. The support plate is used to fix the individual battery cells. The reinforcing beams are disposed on the side of the support plate opposite to the battery cells and fixed to the support plate.

[0006] In the above technical solution, by setting a reinforcing beam on the side of the support plate facing away from the battery cell, the compression resistance of the support plate is improved, the deformation of the support plate is reduced when the battery is subjected to external impact, the risk of the support plate damaging the battery cell is reduced, and the safety of the battery is improved.

[0007] In some implementations, the number of reinforcing beams may include multiple beams.

[0008] In the above technical solution, when the battery is subjected to external impact, the impact force on the support plate can be distributed to multiple reinforcing beams, thereby reducing the deformation of the support plate at multiple locations. The positions of the multiple reinforcing beams can be flexibly set according to the weak points of the support plate. Compared with an integral reinforcing beam that simultaneously covers the dispersed weak points, this technical solution can reduce the volume and weight of the reinforcing beams and improve the energy density of the battery cells.

[0009] In some embodiments, the plurality of reinforcing beams includes a plurality of first reinforcing beams spaced apart along a first direction, each first reinforcing beam extending along a second direction. The thickness direction of the bearing plate, the first direction, and the second direction intersect each other.

[0010] In the above technical solution, multiple first reinforcing beams can enhance the stiffness of multiple regions of the bearing plate along the first direction, and each first reinforcing beam extending along the second direction can reduce the deformation of the bearing plate along the second direction, thereby improving the overall compressive strength of the bearing plate, reducing the risk of the bearing plate damaging the battery cells, and improving the safety of the battery.

[0011] In some embodiments, the plurality of reinforcing beams also include a second reinforcing beam that connects to an adjacent first reinforcing beam.

[0012] In the above technical solution, the second reinforcing beam connects the adjacent first reinforcing beams. When the battery is subjected to external impact, the first reinforcing beam, which is subjected to the force, can transfer the force to the adjacent first reinforcing beam through the second reinforcing beam. This effectively disperses the force, reduces stress concentration, and decreases the risk of deformation of the first reinforcing beam and the load-bearing plate, thereby improving safety. The second reinforcing beam also strengthens the stiffness of the portion of the load-bearing plate located between the two first reinforcing beams, reducing the deformation of the load-bearing plate.

[0013] In some implementations, adjacent first reinforcing beams are connected by a plurality of second reinforcing beams.

[0014] In the above technical solution, multiple second reinforcing beams are set between adjacent first reinforcing beams to further enhance the compressive strength of the bearing plate in the area between two adjacent first reinforcing beams, reduce the risk of bearing plate deformation, and improve safety.

[0015] In some embodiments, the ratio of the dimension of the first reinforcing beam along the second direction to the dimension of the bearing plate along the second direction is K, where K satisfies 0.5≤K≤1.

[0016] In the above technical solution, the smaller the value of K, the smaller the dimension of the first reinforcing beam along the second direction, the less significant the reinforcing effect of the first reinforcing beam on the load-bearing plate, and the higher the risk of load-bearing plate deformation. After in-depth research and numerous experiments, the inventors discovered that limiting the value of K to greater than or equal to 0.5 can reduce the risk of load-bearing plate deformation. The larger the value of K, the larger the dimension of the first reinforcing beam along the second direction, the more significant the reinforcing effect of the first reinforcing beam on the load-bearing plate, and the lower the risk of load-bearing plate deformation. However, the larger the value of K, the greater the weight and volume of the first reinforcing beam, and the lower the energy density of the battery. After in-depth research and numerous experiments, the inventors discovered that limiting the value of K to less than or equal to 1 can reduce the risk of load-bearing plate deformation and reduce the loss of battery energy density.

[0017] In some embodiments, the plurality of reinforcing beams further includes a first reinforcing beam and a second reinforcing beam, which are connected together. The first reinforcing beam extends along a second direction, and the second reinforcing beam extends along a first direction. The thickness direction, the first direction, and the second direction of the bearing plate intersect each other.

[0018] In the above technical solution, the intersection of the first and second reinforcing beams increases the area of ​​the bearing plate that is reinforced, thereby reducing the deformation of the bearing plate. For example, in addition to the areas of the bearing plate connected to the first and second reinforcing beams, the area of ​​the bearing plate near the connection between the first and second reinforcing beams can also be reinforced.

[0019] In some implementations, the first reinforcing beam and the second reinforcing beam are integrally formed.

[0020] In the above technical solution, the first reinforcing beam and the second reinforcing beam are integrated as a whole, which can improve the overall rigidity of the first reinforcing beam and the second reinforcing beam, eliminate the connection process between the first reinforcing beam and the second reinforcing beam, and improve the assembly efficiency of the battery.

[0021] In some implementations, the first reinforcing beam passes through the centerline of the bearing plate along a first direction.

[0022] In the above technical solution, when the bearing plate is under stress, the central region of the bearing plate is more prone to deformation than the edge region. This technical solution involves placing a first reinforcing beam through the center of the bearing plate along a first direction to strengthen the central region of the bearing plate and reduce the risk of deformation in that region.

[0023] In some embodiments, the reinforcing beam includes a reinforcing portion and connecting portions disposed on both sides of the reinforcing portion, the connecting portions being connected to a bearing plate, and the reinforcing portion protruding from the surface of the connecting portions away from the bearing plate.

[0024] In the above technical solution, the reinforcing part protrudes from the connecting part, which can increase the size of the reinforcing beam in the thickness direction of the bearing plate, so that the reinforcing beam has higher strength and stiffness, thereby effectively limiting the deformation of the bearing plate.

[0025] In some embodiments, the reinforcing beam has a recess at a position corresponding to the reinforcing portion, and the recess is recessed relative to the surface of the connecting portion facing the load-bearing plate.

[0026] In the above technical solution, by setting a recess on the reinforcing beam that corresponds to the reinforcing part, the weight of the reinforcing beam can be reduced while ensuring that the overall strength of the reinforcing part meets the requirements, thereby reducing the overall weight of the battery.

[0027] In some embodiments, the reinforcing beam includes a plurality of spaced-apart reinforcing sections, with adjacent reinforcing sections connected by connecting sections.

[0028] In the above technical solution, by setting multiple reinforcing parts, the compressive strength of a single reinforcing beam can be increased. Adjacent reinforcing parts are connected into a whole through connecting parts, so that when only one or more reinforcing parts in the reinforcing beam are subjected to external compressive force, it can be transferred to the reinforcing parts that are not subjected to compressive force through the connecting parts, distributing the compressive force to each reinforcing part of the reinforcing beam, thereby reducing the impact of compressive force on the reinforcing beam, further improving the compressive strength of the reinforcing beam, thereby improving the overall strength of the box, and thus improving the strength of the battery using the box.

[0029] In some embodiments, a first frame is also included, which is connected to and encloses a support plate to form a first cavity, in which a single battery cell is housed. A reinforcing beam is connected to the first frame by fasteners.

[0030] In the above technical solution, a portion of the reinforcing beam is connected to the first frame by fasteners, so that the reinforcing beam is not only fixedly connected to the bearing plate, but also fixedly connected to the first frame, thereby improving the stability of the reinforcing beam. When the bearing plate is subjected to compression or collision, part of the compression or collision force can be transferred to the reinforcing beam and the first frame through the bearing plate, dispersing the compression or collision force on the bearing plate and further improving the overall strength of the box.

[0031] In some embodiments, a second frame is also included, disposed on the side of the support plate opposite to the battery cell and connected to the support plate. The support plate and the second frame together form a second cavity. The battery includes a control unit housed in the second cavity, and the control unit is electrically connected to the battery cell.

[0032] In the above technical solution, a second frame is provided on the support plate to house the control unit, which improves the integration of the housing and reduces the space occupied by the housing in the vehicle. When the battery is subjected to external impact, the second frame can also disperse the impact force on the support plate and reduce the deformation of the support plate.

[0033] In some embodiments, in the thickness direction of the bearing plate, the end of the reinforcing beam away from the bearing plate does not extend beyond the end of the second frame away from the bearing plate.

[0034] In the above technical solution, the reinforcing beam and the second frame can share some space in the thickness direction. The reinforcing beam will not increase the maximum size of the battery in the thickness direction, thereby improving space utilization and battery energy density.

[0035] In some implementations, the reinforcing beam is spaced apart from the second frame.

[0036] In the above technical solution, by spacing the reinforcing beam from the second frame, the risk of interference between the reinforcing beam and the second frame during battery assembly is reduced. The second frame is used to protect the control unit; spacing the reinforcing beam from the second frame reduces the force transmitted to the second frame, thus reducing the risk of deformation of the second frame and compression of the control unit.

[0037] Secondly, embodiments of this application provide a battery, including a battery cell; and a plurality of housings according to any embodiment of the first aspect, the housings being used to house the battery cell.

[0038] Thirdly, embodiments of this application provide a vehicle including a battery according to the second aspect of the embodiment, the battery being used to provide electrical energy.

[0039] In some implementations, the reinforcing beam is a crossbeam or longitudinal beam of the vehicle.

[0040] In the above technical solution, the reinforcing beam integrated on the battery can not only improve the overall rigidity of the battery, but also save the use of the vehicle's central beam, reduce the superposition of excess in the vehicle's strength design, reduce the vehicle's weight, and improve the vehicle's integration.

[0041] In some embodiments, the battery cell is located on the underside of the support plate; a pressure relief mechanism is provided at the end of the battery cell facing away from the support plate.

[0042] In the above technical solution, when a battery cell experiences thermal runaway, the battery cell can release the high-temperature and high-pressure substances inside the battery cell to the side away from the vehicle through a pressure relief mechanism, thereby reducing the risk of high-temperature substances harming the vehicle and passengers and improving safety. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0044] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0045] Figure 2 Explosion diagrams of batteries provided for some embodiments of this application;

[0046] Figure 3 This is a schematic diagram of the structure of the box provided in some embodiments of this application;

[0047] Figure 4 This is a top view of the box structure provided in some embodiments of this application;

[0048] Figure 5 A top view of the housing provided in some embodiments of this application;

[0049] Figure 6 for Figure 4 The enlarged schematic diagram of the box shown at point Q in the circle is shown.

[0050] Figure 7 This is a side view of the box structure provided in some embodiments of this application.

[0051] The accompanying drawings are not drawn to scale.

[0052] Marker explanation:

[0053] 1000, Vehicle; 2000, Battery; 2010, Housing; 2020, Individual Battery Cell; 2030, Pressure Relief Mechanism; 3000, Controller; 4000, Motor;

[0054] 1. Support plate;

[0055] 2. Reinforcing beam; 21. First reinforcing beam; 22. Second reinforcing beam; E1. Centerline; 23. Reinforcing part; 24. Connecting part; 25. Recess; 26. First frame; 27. Second frame

[0056] X, first direction; Y, second direction; Z, thickness direction. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0059] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0060] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication 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.

[0061] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0062] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0063] In this application, "multiple" means two or more (including two).

[0064] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited thereto.

[0065] The battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. A battery generally includes a casing for encapsulating one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0066] In related technologies, battery cells are typically fixed to a support plate of a casing. The inventors noted that the support plate needs to bear the weight of the battery cells. When the battery is subjected to external impact, the support plate will be subjected to a large force. The support plate may deform due to insufficient rigidity, which may cause the support plate to crush the battery cells, thereby causing the risk of battery thermal runaway.

[0067] In view of this, this application provides a technical solution in which the battery casing includes a support plate and a reinforcing beam. The support plate is used to fix the battery cells. The reinforcing beam is disposed on the side of the support plate opposite to the battery cells and fixed to the support plate.

[0068] This technical solution improves the bearing plate's resistance to compression by setting a reinforcing beam on the side of the bearing plate facing away from the battery cell. This reduces the deformation of the bearing plate when the battery is subjected to external impact, lowers the risk of the bearing plate damaging the battery cell, and improves the battery's safety.

[0069] The technical solutions described in the embodiments of this application are applicable to batteries and electrical devices that use batteries.

[0070] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0071] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0072] Figure 1 The diagram shows the structure of a vehicle provided in some embodiments of this application.

[0073] like Figure 1 As shown, a battery 2000 is installed inside the vehicle 1000. The battery 2000 can be located at the bottom, head, or tail of the vehicle 1000. The battery 2000 can be used to power the vehicle 1000; for example, the battery 2000 can serve as the operating power source for the vehicle 1000.

[0074] The vehicle 1000 may also include a controller 3000 and a motor 4000. The controller 3000 is used to control the battery 2000 to supply power to the motor 4000, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0075] In some embodiments of this application, the battery 2000 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0076] Figure 2 This is an exploded schematic diagram of a battery provided for some embodiments of this application.

[0077] like Figure 2 As shown, the battery 2000 includes a housing 2010 and a battery cell 2020, with the battery cell 2020 housed within the housing 2010.

[0078] In battery 2000, there can be one or more battery cells 2020. If there are multiple battery cells 2020, they can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 2020 are connected in both series and parallel. Multiple battery cells 2020 can be directly connected in series, parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 2020 is housed in housing 2010. Alternatively, multiple battery cells 2020 can first be connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole assembly, which is then housed in housing 2010.

[0079] Figure 3 The diagram shows the structure of the housing provided in some embodiments of this application.

[0080] like Figure 3 As shown, the housing 2010 of this application embodiment is used for a battery. The housing 2010 includes a support plate 1 and a reinforcing beam 2. The support plate 1 is used to fix the battery cell 2020. The reinforcing beam 2 is disposed on the side of the support plate 1 opposite to the battery cell 2020 and fixed to the support plate 1.

[0081] This application does not limit the method of fixing the battery cell 2020 to the carrier plate 1. Exemplarily, the battery cell 2020 can be fixed to the carrier plate 1 by adhesive, snap-fit ​​or other means.

[0082] The material of the bearing plate 1 includes steel, aluminum, composite materials or other materials.

[0083] The embodiments of this application do not limit the number, location, and shape of the reinforcing beams 2. Exemplarily, there may be one or more reinforcing beams 2. Exemplarily, the reinforcing beams may be straight, curved, or other shapes.

[0084] For example, the reinforcing beam 2 can be disposed in the middle region of the bearing plate 1, or in the edge region of the bearing plate 1, or in both the middle region and the edge region of the bearing plate 1.

[0085] The embodiments of this application do not limit the extension dimension of the reinforcing beam 2. For example, in the extension direction of the reinforcing beam 2, the dimension of the reinforcing beam 2 can be greater than, less than or equal to the dimension of the bearing plate 1.

[0086] In some examples, the reinforcing beam 2 and the load-bearing plate 1 may be two separate components, which may be connected by welding, threaded connection, snap-fit, adhesive bonding, or other means. In other examples, the reinforcing beam 2 and the load-bearing plate 1 may also be integrally formed into a structure.

[0087] The reinforcing beam 2 can be a solid structure or a hollow structure.

[0088] The reinforcing beam 2 and the load-bearing plate 1 can be made of the same material or different materials. For example, the compressive strength of the material of the reinforcing beam 2 is greater than that of the material of the load-bearing plate 1.

[0089] In this embodiment of the application, when a battery cell is subjected to external impact, the reinforcing beam 2 fixed to the support plate 1 can limit the deformation of the support plate 1, improve the compression resistance of the support plate 1, reduce the risk of the support plate 1 damaging the battery cell, and improve the safety of the battery.

[0090] In some embodiments, such as Figure 3 As shown, the number of reinforcing beams 2 includes multiple beams.

[0091] The shapes and sizes of the different reinforcing beams 2 can be the same or different. For example, for any two reinforcing beams 2, the extension directions of the two reinforcing beams 2 can be the same or different, the two reinforcing beams 2 can be connected or spaced apart, and the shapes of the two reinforcing beams 2 can be the same or different.

[0092] In this embodiment, when the battery is subjected to an external impact, the impact force on the support plate 1 can be distributed to multiple reinforcing beams 2, thereby reducing the deformation of the support plate 1 at multiple locations. The positions of the multiple reinforcing beams 2 can be flexibly set according to the weak points of the support plate 1. Compared with an integral reinforcing beam that simultaneously covers the dispersed weak points, this embodiment can reduce the volume and weight of the reinforcing beams 2 and improve the energy density of the battery cell.

[0093] In some embodiments, such as Figure 3As shown, the plurality of reinforcing beams 2 include a plurality of first reinforcing beams 21 spaced apart along a first direction X, and each first reinforcing beam 21 extends along a second direction Y. The thickness direction of the bearing plate 1 is such that the first direction X and the second direction Y intersect each other.

[0094] In the first direction X, multiple first reinforcing beams 21 can be arranged at equal intervals or at unequal intervals. For two adjacent first reinforcing beams 21, the dimensions of the two first reinforcing beams 21 along the second direction Y can be the same or different.

[0095] This application does not limit the dimension of the first reinforcing beam 21 extending along the second direction Y. In some examples of this embodiment, the first reinforcing beam 21 may extend along the second direction Y to one or both edges of the opposite sides of the bearing plate 1 along the second direction Y. The first reinforcing beam 21 may extend along the second direction Y from the edge of the bearing plate 1 to the center of the bearing plate 1.

[0096] In other examples of this embodiment, multiple first reinforcing beams 21 may be arranged side-by-side along the second direction Y on the bearing plate 1. It should be noted that the length of the first reinforcing beam 21 extending along the second direction Y and the sum of the lengths of the multiple first reinforcing beams 21 extending along the second direction Y after they are arranged side-by-side along the second direction Y cannot exceed the length of the bearing plate 1 along the second direction Y.

[0097] In this embodiment of the application, multiple first reinforcing beams 21 can enhance the stiffness of multiple regions of the bearing plate 1 along the first direction X, and each first reinforcing beam 21 extending along the second direction Y can reduce the deformation of the bearing plate 1 along the second direction Y, thereby improving the overall compressive strength of the bearing plate, reducing the risk of the bearing plate damaging the battery cells, and improving the safety of the battery.

[0098] In some embodiments, the thickness direction, the first direction X, and the second direction Y of the support plate 1 are perpendicular to each other.

[0099] Figure 4 Top view of the housing provided in some embodiments of this application

[0100] In some embodiments, such as Figure 4 As shown, the plurality of reinforcing beams 2 also include a second reinforcing beam 22, which connects to the adjacent first reinforcing beam 21.

[0101] In some examples of this embodiment, the second reinforcing beam 22 may extend along the first direction X, thereby connecting two adjacent first reinforcing beams 21. In other examples of this embodiment, the second reinforcing beam 22 may extend along a direction at a predetermined angle to the first direction X, thereby connecting two adjacent first reinforcing beams 21.

[0102] In some examples, the material of the first reinforcing beam 21 and the material of the second reinforcing beam 22 can be the same. In other examples, the materials of the first reinforcing beam 21 and the second reinforcing beam 22 can be different.

[0103] In some examples, the shape of the first reinforcing beam 21 may be the same as that of the second reinforcing beam 22. In other examples, the dimensions of the first reinforcing beam 21 and the second reinforcing beam 22 may be the same. In still other examples, the second reinforcing beam 22 may be provided with a locking part of a different shape than that of the first reinforcing beam 21, so that the first reinforcing beam 21 and the second reinforcing beam 22 can respectively lock different vehicle components.

[0104] It should be noted that when there are multiple second reinforcing beams 22, the dimensions of the multiple reinforcing beams 2 can be different; the shapes of the multiple reinforcing beams 2 can be different.

[0105] In some examples, the second reinforcing beam 22 can be fixedly connected to the bearing plate 1 by means of bolts, welding, bonding, etc.

[0106] In this embodiment, the second reinforcing beam 22 connects the adjacent first reinforcing beam 21. When the battery is subjected to external impact, the first reinforcing beam 21 subjected to the force can transfer the force to the adjacent first reinforcing beam 21 through the second reinforcing beam 22, thereby effectively dispersing the force, reducing stress concentration, reducing the risk of deformation of the first reinforcing beam 21 and the bearing plate, and improving safety. The second reinforcing beam 22 can also strengthen the stiffness of the portion of the bearing plate 1 located between the two first reinforcing beams 21, reducing the deformation of the bearing plate 1.

[0107] In some embodiments, any two adjacent first reinforcing beams 21 are connected by a second reinforcing beam 22.

[0108] In some embodiments, such as Figure 4 As shown, adjacent first reinforcing beams 21 are connected by multiple second reinforcing beams 22.

[0109] In this embodiment, multiple second reinforcing beams 22 are provided between adjacent first reinforcing beams 21 to further enhance the compressive strength of the bearing plate 1 in the area between two adjacent first reinforcing beams 21, reduce the risk of deformation of the bearing plate 1, and improve safety.

[0110] In some embodiments, the ratio of the dimension of the first reinforcing beam 21 along the second direction Y to the dimension of the bearing plate 1 along the second direction Y is K, where K satisfies 0.5 ≤ K ≤ 1. Exemplarily, the value of K may be 0.5, 0.6, 0.7, 0.8, 0.9 or 1.

[0111] The smaller the value of K, the smaller the dimension of the first reinforcing beam 21 along the second direction Y, the less significant the reinforcing effect of the first reinforcing beam 21 on the bearing plate 1, and the higher the risk of deformation of the bearing plate 1. After in-depth research and a large number of experiments, the inventors found that limiting the value of K to greater than or equal to 0.5 can reduce the risk of deformation of the bearing plate 1.

[0112] The larger the value of K, the larger the dimension of the first reinforcing beam 21 along the second direction Y, the more significant the reinforcing effect of the first reinforcing beam 21 on the bearing plate 1, and the lower the risk of deformation of the bearing plate 1. However, the larger the value of K, the larger the weight and volume of the first reinforcing beam 21, and the lower the energy density of the battery. After in-depth research and a large number of experiments, the inventors found that limiting the value of K to less than or equal to 1 can reduce the risk of deformation of the bearing plate 1 and reduce the loss of energy density of the battery.

[0113] Figure 5 Top view of the housing provided in some embodiments of this application

[0114] In some embodiments, such as Figure 5 As shown, the plurality of reinforcing beams 2 also include a first reinforcing beam 21 and a second reinforcing beam 22, which are connected together. The first reinforcing beam 21 extends along the second direction Y, and the second reinforcing beam 22 extends along the first direction X. The thickness direction of the bearing plate 1 is such that the first direction X and the second direction Y intersect each other.

[0115] In some examples of this embodiment, there is one first reinforcing beam 21 and one second reinforcing beam 22. The first reinforcing beam 21 is located on the bearing plate 1 and extends along the second direction Y. One end of the second reinforcing beam 22 is connected to the first reinforcing beam 21, and the other end of the second reinforcing beam 22 can extend to the edge of the bearing plate 1 or to a preset area of ​​the bearing plate 1.

[0116] In this embodiment, the first reinforcing beam 21 and the second reinforcing beam 22 are arranged intersectingly, which can increase the area of ​​the bearing plate 1 that is reinforced and reduce the deformation of the bearing plate 1. For example, in addition to the area of ​​the bearing plate 1 connected to the first reinforcing beam 21 and the area of ​​the bearing plate 1 connected to the second reinforcing beam 22, the area of ​​the bearing plate 1 near the connection between the first reinforcing beam 21 and the second reinforcing beam 22 can also be reinforced.

[0117] In some embodiments, the first reinforcing beam 21 and the second reinforcing beam 22 are integrally formed.

[0118] In this embodiment, the first reinforcing beam 21 and the second reinforcing beam 22 are integrated as a whole, which can improve the rigidity of the whole formed by the first reinforcing beam 21 and the second reinforcing beam 22, eliminate the connection process of the first reinforcing beam 21 and the second reinforcing beam 22, and improve the assembly efficiency of the battery 2000.

[0119] In some embodiments, such as Figure 5 As shown, the first reinforcing beam 21 passes through the centerline E1 of the bearing plate 1 along the first direction X.

[0120] In some examples, the first reinforcing beam 21 is symmetrically arranged along the centerline E1 of the first direction X. In other examples, the size of the portion of the first reinforcing beam 21 located on one side of the centerline E1 along the first direction X may be larger than the size of the portion of the first reinforcing beam 21 located on the other side of the centerline E1 along the first direction X.

[0121] When the bearing plate 1 is subjected to force, the central region of the bearing plate 1 is more prone to deformation than the edge region. In this embodiment, the first reinforcing beam 21 passes through the center of the bearing plate 1 along the first direction X to strengthen the central region of the bearing plate 1 and reduce the risk of deformation in the central region of the bearing plate 1.

[0122] Figure 6 for Figure 4 The enlarged schematic diagram of the box shown at point Q in the circle.

[0123] In some embodiments, such as Figure 6 As shown, the reinforcing beam 2 includes a reinforcing part 23 and connecting parts 24 disposed on both sides of the reinforcing part 23. The connecting parts 24 are connected to the bearing plate 1, and the reinforcing part 23 protrudes from the surface of the connecting parts 24 away from the bearing plate 1.

[0124] The connecting part 24 is fixed to the bearing plate 1 by means of bolts, welding, bonding and snap-fitting.

[0125] The connecting part 24 and the reinforcing part 23 can be an integrally formed structure, or they can be connected by bolts, welding, bonding and snap-fitting.

[0126] There can be one or more reinforced sections 23.

[0127] In this embodiment, the reinforcing part 23 protrudes from the connecting part 24, which increases the dimension of the reinforcing beam 2 in the thickness direction of the bearing plate 1, so that the reinforcing beam 2 has higher strength and rigidity, thereby effectively limiting the deformation of the bearing plate.

[0128] In some embodiments, please continue reading Figure 6 The reinforcing beam 2 has a recess 25 at a position corresponding to the reinforcing part 23, and the recess 25 is recessed relative to the surface of the connecting part 24 facing the bearing plate 1.

[0129] In some examples, the reinforcing portion 23 protrudes from the connecting portion 24, and the recess 25 is located on the side of the reinforcing portion 23 facing the support plate 1, and is formed by the recess of the connecting portion 24 towards the support plate 1. It is understood that the recess 25 reduces the thickness of the reinforcing portion 23. In some examples of this embodiment, the recessed shape of the recess 25 matches the protruding shape of the reinforcing portion 23, making the reinforcing portion 23 a thin-walled structure. This allows for the reduction of the weight of the reinforcing beam 2 as much as possible while ensuring the overall strength of the reinforcing portion 23.

[0130] In some examples of this embodiment, the recess 25 on the reinforcing beam 2 extends through the reinforcing beam 2 along its extension direction. In other examples of this embodiment, the recess 25 on the reinforcing beam 2 extends to a predetermined position on the reinforcing beam 2 along its extension direction. In still other examples of this embodiment, multiple recesses 25 may be provided on the reinforcing beam 2 along its extension direction.

[0131] In this embodiment, a recess 25 corresponding to the reinforcing part 23 is provided on the reinforcing beam 2. This can reduce the weight of the reinforcing beam 2 while ensuring that the overall strength of the reinforcing part 23 meets the requirements, thereby reducing the overall weight of the battery.

[0132] In some embodiments, please continue reading Figure 5 and Figure 6 The reinforcing beam 2 includes a plurality of spaced reinforcing parts 23, and adjacent reinforcing parts 23 are connected by connecting parts 24.

[0133] In some examples of this embodiment, a reinforcing beam 2 may include a plurality of spaced-apart reinforcing portions 23. Exemplarily, a first reinforcing beam 21 includes a plurality of reinforcing portions 23 spaced apart along a first direction X, with adjacent reinforcing portions 23 connected by connecting portions 24, such that the plurality of reinforcing portions 23 constitute a first reinforcing beam 21. It is understood that the connecting portion 24 between two adjacent reinforcing portions 23 may be shared; that is, a connecting portion 24 is provided between two adjacent reinforcing portions 23. This connecting portion 24 can either connect the two adjacent reinforcing portions 23 into a whole or fix these two reinforcing portions 23 to the support plate 1.

[0134] In some examples, multiple reinforcing parts 23 on a reinforcing beam 2 can have different sizes and shapes. The minimum spacing between these multiple reinforcing parts 23 can also be different.

[0135] In this embodiment, by providing multiple reinforcing parts 23, the compressive strength of a single reinforcing beam 2 can be increased. Adjacent reinforcing parts 23 are connected as a whole by connecting parts 24, so that when only one or more reinforcing parts 23 in the reinforcing beam 2 are subjected to external compressive force, the force can be transferred to the reinforcing parts 23 that are not subjected to compressive force through the connecting parts 24, thereby distributing the compressive force to each reinforcing part 23 of the reinforcing beam 2, thereby reducing the impact of compressive force on the reinforcing beam 2, further improving the compressive strength of the reinforcing beam 2, thereby improving the overall strength of the housing 2010, and thus improving the strength of the battery using the housing 2010.

[0136] Figure 7 This is a side view of the box structure provided in some embodiments of this application.

[0137] In some embodiments, such as Figure 7 As shown, the housing 2010 also includes a first frame 26, which is connected to the support plate 1 and encloses the support plate 1 to form a first cavity, in which the battery cell 2020 is housed. The reinforcing beam 2 is connected to the first frame 26 by fasteners.

[0138] In some examples, the first frame 26 may be formed by multiple side beams, which are fixed to each other to ensure the connection strength of the first frame 26.

[0139] In some examples, the shape enclosed by the first frame 26 includes a square, rectangle, circle, or other shapes.

[0140] In this embodiment, a portion of the reinforcing beam 2 is fastened to the first frame 26, so that the reinforcing beam 2 is fixedly connected not only to the bearing plate 1 but also to the first frame 26, thereby improving the stability of the reinforcing beam 2. When the bearing plate 1 is subjected to compression or impact, part of the compression or impact force can be transmitted through the bearing plate 1 to the reinforcing beam 2 and the first frame 26, dispersing the compression or impact force on the bearing plate 1 and further improving the overall strength of the housing 2010. In some embodiments, please continue to refer to Figure 7 The housing 2010 also includes a second frame 27, which is disposed on the side of the support plate 1 opposite to the battery cell 2020 and connected to the support plate 1. The support plate 1 and the second frame 27 together form a second cavity. The battery 2000 includes a control unit housed in the second cavity, which is electrically connected to the battery cell 2020.

[0141] In some examples, the second frame 27 is located on the side of the support plate 1 facing away from the battery cell 2020, and the second frame 27 is formed by multiple sidewalls. The material of the sidewalls can be the same as that of the support plate 1. Multiple control units can be placed in the second frame 27 to control the battery cell 2020 on the other side of the support plate 1. It is understood that the second frame 27 can be fixed to the support plate 1 or integrally formed with the support plate 1. Furthermore, some sidewalls of the second frame 27 can be fixedly connected to a portion of the structure of the first frame 26 using fasteners.

[0142] In this embodiment, a second frame 27 for storing the control unit is provided on the support plate 1, which improves the integration of the housing 2010 and reduces the space occupied by the housing 2010 in the whole vehicle. When the battery is subjected to external impact, the second frame 27 can also disperse the impact force on the support plate 1 and reduce the deformation of the support plate.

[0143] In some embodiments, the control unit includes a high-voltage box.

[0144] In some embodiments, please continue reading Figure 7 In the thickness direction Z of the bearing plate 1, the end of the reinforcing beam 2 away from the bearing plate 1 does not extend beyond the end of the second frame 27 away from the bearing plate 1.

[0145] In the thickness direction Z of the bearing plate 1, the maximum dimension of the reinforcing beam 2 is smaller than the maximum dimension of the second frame 27.

[0146] In this embodiment, the reinforcing beam 2 and the second frame 27 can share a portion of the space in the thickness direction Z. The reinforcing beam 2 will not increase the maximum size of the battery in the thickness direction Z, thereby improving space utilization and battery energy density.

[0147] In some embodiments, such as Figure 7 As shown, the reinforcing beam 2 and the second frame 27 are spaced apart.

[0148] In this embodiment, by spacing the reinforcing beam 2 and the second frame 27 apart, the risk of interference between the reinforcing beam 2 and the second frame 27 during battery assembly is reduced. The second frame 27 is used to protect the control unit. Spacing the reinforcing beam 2 and the second frame 27 apart reduces the force transmitted to the second frame 27, thereby reducing the risk of deformation of the second frame 27 and crushing of the control unit.

[0149] In some embodiments, this application also provides a battery 2000, including a battery cell 2020 and a housing 2010 of the battery 2000 of any of the above embodiments, the housing 2010 being used to house the battery cell 2020.

[0150] In some embodiments, this application also provides a vehicle 1000, including the battery 2000 of the above embodiments, the battery 2000 being used to provide electrical energy.

[0151] In some embodiments, the reinforcing beam 2 is a crossbeam or longitudinal beam of the vehicle 1000.

[0152] In this embodiment, the reinforcing beam 2 integrated on the battery can not only improve the overall rigidity of the battery, but also save the use of the beam in the vehicle 1000, reduce the superposition of excess in the vehicle strength design, reduce the weight of the vehicle, and improve the integration of the vehicle.

[0153] In some embodiments, such as Figure 2 As shown, the battery cell 2020 is located on the lower side of the support plate 1. A pressure relief mechanism 2030 is provided at the end of the battery cell 2020 facing away from the support plate 1.

[0154] In this embodiment, the battery 2000 is mounted on the vehicle 1000, and the battery cell 2020 is located on the underside of the support plate 1. In other words, the support plate 1 is located on the side closer to the vehicle 1000, and the battery cell 2020 is fixed on the support plate 1. A pressure relief mechanism 2030 is provided at the end of the battery cell 2020 facing away from the support plate 1. When the battery cell 2020 experiences thermal runaway, the high-temperature and high-pressure substances inside the battery cell 2020 can be released to the side away from the vehicle 1000 through the pressure relief mechanism 2030, thereby reducing the risk of high-temperature substances harming the vehicle and passengers and improving safety.

[0155] In some embodiments, the support plate 1 is fixed to the chassis of the vehicle. Exemplarily, the support plate 1 is fixed to the chassis of the vehicle by fasteners.

[0156] In some embodiments, the terminals and pressure relief mechanism 2030 of the battery cell face downwards and can share the bottom ball impact space at the bottom of the housing, thereby improving the volume utilization rate of the battery.

[0157] In some embodiments, refer to Figure 2 and Figure 3 This application provides a housing 2010. The housing 2010 is used for a battery. The housing 2010 includes a support plate 1 and reinforcing beams 2. The support plate 1 is used to fix the battery cell 2020. The reinforcing beams 2 are disposed on the side of the support plate 1 opposite to the battery cell 2020 and fixed to the support plate 1. There are multiple reinforcing beams 2, and at least some of the reinforcing beams 2 extend along a predetermined direction on the support plate 1. This application also provides a vehicle 1000. The vehicle 1000 includes a battery 2000, and the battery 2000 includes a housing 2010 for accommodating the battery cell 2020. The reinforcing beams 2 on the housing 2010 can be replaced by crossbeams or longitudinal beams on the vehicle 1000.

[0158] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A box (2010), characterized in that: For a battery, the battery comprises a battery cell, the battery cell is multiple, the multiple battery cells are electrically connected in series, in parallel or in mixed connection, and the box comprises: A carrier plate (1) for fixing the battery cell (2020); A reinforcing beam (2) is arranged on a side of the carrying plate (1) away from the battery cell (2020) and is fixed to the carrying plate (1), wherein the number of the reinforcing beams (2) includes a plurality of reinforcing beams, the plurality of reinforcing beams (2) including a plurality of first reinforcing beams (21) arranged at intervals along a first direction (X), and each of the first reinforcing beams (21) extends along a second direction (Y); The thickness direction (Z) of the carrying plate (1), the first direction (X) and the second direction (Y) intersect each other.

2. The box (2010) according to claim 1, characterized in that: The plurality of reinforcing beams (2) further include a second reinforcing beam (22), wherein the second reinforcing beam (22) connects adjacent first reinforcing beams (21).

3. The box (2010) according to claim 2, characterized in that: Adjacent first reinforcing beams (21) are connected via a plurality of second reinforcing beams (22).

4. The box (2010) according to claim 2 or 3, characterized in that: The ratio of the size of the first reinforcing beam (21) along the second direction (Y) to the size of the bearing plate (1) along the second direction (Y) is K, and K satisfies 0.5≤K≤1.

5. The box (2010) according to claim 1, characterized in that: The plurality of reinforcing beams (2) include a first reinforcing beam (21) and a second reinforcing beam (22), wherein the first reinforcing beam (21) and the second reinforcing beam (22) are connected and arranged, the first reinforcing beam (21) extends along a second direction (Y), and the second reinforcing beam (22) extends along a first direction (X); The thickness direction (Z) of the carrying plate (1), the first direction (X) and the second direction (Y) intersect each other.

6. The box (2010) according to claim 2, characterized in that: The first reinforcing beam (21) and the second reinforcing beam (22) are integrally formed.

7. The box (2010) according to claim 1, characterized in that: The first reinforcing beam (21) passes through a center line (E1) of the bearing plate (1) along the first direction (X).

8. The box (2010) according to claim 1, characterized in that: The reinforcing beam (2) comprises a reinforcing portion (23) and connecting portions (24) arranged on both sides of the reinforcing portion (23), the connecting portions (24) being connected to the bearing plate (1), and the reinforcing portion (23) protruding from a surface of the connecting portion (24) facing away from the bearing plate (1).

9. The box (2010) according to claim 8, characterized in that: The reinforcing beam (2) is provided with a recess (25) at a position corresponding to the reinforcing portion (23), and the recess (25) is recessed relative to a surface of the connecting portion (24) facing the bearing plate (1).

10. The box (2010) according to claim 9, characterized in that: The reinforcing beam (2) comprises a plurality of reinforcing portions (23) arranged at intervals, and adjacent reinforcing portions (23) are connected via the connecting portion (24).

11. The box (2010) according to claim 1, characterized in that: It also includes a first frame (26), the first frame (26) being connected to the carrier plate (1) and enclosing the first frame with the carrier plate (1) to form a first cavity, and the battery cell (2020) being accommodated in the first cavity; The reinforcing beam (2) is connected to the first frame (26) via a fastener.

12. The box (2010) according to claim 1, characterized in that: It also includes a second frame (27), the second frame (27) being arranged on a side of the carrier plate (1) away from the battery cell (2020) and connected to the carrier plate (1); The carrying plate (1) and the second frame (27) are enclosed to form a second cavity; The battery comprises a control unit accommodated in the second cavity, and the control unit is electrically connected to the battery cell (2020).

13. The box (2010) according to claim 12, characterized in that: In the thickness direction (Z) of the bearing plate (1), the end of the reinforcing beam (2) facing away from the bearing plate (1) does not extend beyond the end of the second frame (27) facing away from the bearing plate (1).

14. The box (2010) according to claim 13, characterized in that: The reinforcing beam (2) and the second frame (27) are arranged at a distance.

15. A battery, characterized in that: include: Battery cells (2020); as well as The box (2010) according to any one of claims 1 to 14, wherein the box (2010) is used to accommodate the battery cell (2020).

16. A vehicle (1000), characterized in that: A battery according to claim 15, for providing electrical energy.

17. The vehicle (1000) according to claim 16, characterized in that The reinforcing beam (2) is a cross beam or a longitudinal beam of the vehicle (1000).

18. The vehicle (1000) according to claim 16, characterized in that The battery cell (2020) is located on the lower side of the carrier plate (1); and a pressure relief mechanism (2030) is provided at one end of the battery cell (2020) that is away from the carrier plate (1).

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