Battery housing, battery, and electrical device

Abstract

This application provides a battery housing, a battery, and an electrical device. The housing includes a support plate and multiple side beams. The side beams are connected to the support plate and enclose a receiving space. At least one side beam includes a beam body and a buffer portion. The buffer portion protrudes from the beam body and extends along the length of the beam body towards the receiving space. The buffer portion is located on the side of the beam body away from the support plate. By providing a buffer portion on the side of the side beam facing the receiving space, this application allows the buffer portion to absorb some of the external force after the housing is subjected to external pressure, reducing the pressure on the battery cells inside the housing.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a battery housing, a battery, and an electrical device. 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] With the development of electronic devices, higher requirements have been placed on the safety performance of battery packs integrated with individual battery cells and the impact resistance of electronic devices. Improving the strength of the battery pack casing while facilitating installation and reducing costs is an urgent problem to be solved in battery technology. Summary of the Invention

[0004] This application provides a battery housing, a battery, and an electrical device that can improve the overall strength of a battery pack.

[0005] In a first aspect, embodiments of this application provide a battery housing, including a support plate; and a plurality of side beams connected to the support plate and enclosing the support plate to form an accommodating space, wherein at least one side beam includes a beam body and a buffer portion, the buffer portion protruding out of the beam body toward the accommodating space and extending along the length direction of the beam body, the buffer portion being located on the side of the beam body away from the support plate.

[0006] In the above technical solution, by adding a buffer section to the side beam, the compressive force on the side beam is reduced, the compressive strength of the side beam is improved, the possibility of the battery cells inside the box being deformed or even damaged by compression is reduced, and the safety of the battery box is improved. This technical solution sets a buffer section on the side of the side beam facing the receiving space. This allows the buffer section to absorb some of the external force after the box is subjected to external compression, reducing the compression of the battery cells inside the box.

[0007] In some embodiments, the buffer section includes a plurality of buffer blocks spaced apart along the length direction.

[0008] In the above technical solution, multiple buffer blocks can effectively reduce the weight of the buffer section on the box, and the buffer blocks can utilize the space between the box and the internal battery cells to improve the utilization rate of the box.

[0009] In some implementations, multiple buffer blocks are arranged at equal intervals along the extension direction of the beam body.

[0010] In the above technical solution, the buffer blocks are set at equal intervals to facilitate their fabrication and reduce the difficulty of the process.

[0011] In some implementations, the distance between two adjacent buffer blocks in the extension direction of the beam body is L1, where 1mm ≤ L1 ≤ 1500mm.

[0012] In the above technical solutions, the smaller the distance between adjacent buffer blocks, the more buffer blocks are required, resulting in a greater increase in weight and hindering the lightweight design of the enclosure. Conversely, the larger the distance between adjacent buffer blocks, the fewer buffer blocks are required, leading to a smaller buffering effect and reduced compression resistance of the enclosure. This technical solution limits the distance between adjacent buffer blocks to 1mm ≤ L1 ≤ 1500mm to balance lightweight design and compression resistance.

[0013] In some implementations, the spacing L1 between two adjacent buffer blocks satisfies 5mm ≤ L1 ≤ 20mm.

[0014] In the above technical solution, the spacing between adjacent buffer blocks is further restricted, which enables the buffer blocks to obtain better resistance to compression.

[0015] In some embodiments, the buffer also includes a clearance structure for clearing components housed in the receiving space.

[0016] In the above technical solution, the avoidance structure allows the buffer section to further utilize the gaps in the battery space, increasing the overall volume of the buffer section, enabling it to absorb more external forces, and improving the box's resistance to compression and space utilization.

[0017] In some implementations, the avoidance structure includes a gap between two adjacent buffer blocks.

[0018] In the above technical solution, the gap between adjacent buffer blocks can be used to place various components of the battery in the box, avoiding interference between the buffer blocks and the components in the housing space, and improving the space utilization of the buffer section.

[0019] In some embodiments, the buffer block includes a body portion and a clearance portion extending from the body portion toward the support plate, the clearance portion protruding out of the beam body toward the receiving space, wherein the thickness of the body portion is greater than the thickness of the clearance portion along the protruding direction of the clearance portion.

[0020] In the above technical solution, the thickness of the buffer part is smaller than that of the main body, which can fill the area that the main body cannot protect and where the internal gap of the box is small, thereby increasing the protection area of ​​the buffer part and thus improving the box's resistance to compression.

[0021] In some embodiments, the avoidance structure also includes an avoidance space from the surface of the avoidance portion to the surface of the body portion along the protruding direction.

[0022] In the above technical solution, the clearance space formed by the clearance part and the main body part is used to place the components inside the box and protect the components in the clearance space, reducing the impact of external extrusion on the components in the clearance space.

[0023] In some embodiments, the thickness of the body portion along the protruding direction is H1, where 5 mm ≤ H1 ≤ 100 mm.

[0024] In the above technical solutions, the smaller the thickness of the body portion, the less external force it can absorb, and the lower its impact resistance. Conversely, the larger the thickness of the body portion, the greater its space and weight, and the higher its cost. The above technical solutions limit the thickness of the body portion to 5 mm ≤ H1 ≤ 100 mm to minimize its thickness while ensuring its impact resistance.

[0025] In some embodiments, the thickness of the relief portion along the protruding direction is H2, and H1 and H2 satisfy the relationship: 0.005≤H2 / H1<1.

[0026] In the above technical solution, the smaller the ratio of the thickness of the clearance part to the thickness of the main body, the lower the impact resistance of the clearance part. The larger the ratio of the thickness of the clearance part to the thickness of the main body, the larger the space and weight occupied by the clearance part, and the higher the cost. The above technical solution limits the thickness of the clearance part to 0.005 ≤ H2 / H1 < 1, in order to minimize the thickness of the clearance part as much as possible while ensuring its impact resistance.

[0027] In some embodiments, the height of the body portion along the thickness direction of the support plate is D1, where 10 mm ≤ D1 ≤ 100 mm.

[0028] In the above technical solutions, the lower the height of the main body, the lower its impact resistance. Conversely, the higher the height of the main body, the greater its space and weight, and the higher its cost. Therefore, the goal is to minimize the height of the main body while ensuring its impact resistance.

[0029] In some embodiments, the height of the clearance portion along the thickness direction of the support plate is D2, where 10 mm ≤ D1 ≤ 100 mm.

[0030] In the above technical solution, the smaller the ratio of the height of the avoidance part to the height of the main body, the lower the impact resistance of the avoidance part. The larger the ratio of the height of the avoidance part to the height of the main body, the larger the space and weight occupied by the avoidance part, and the higher the cost. Therefore, the height of the avoidance part should be minimized as much as possible while ensuring its impact resistance.

[0031] In some embodiments, the buffer section includes a connecting section that connects multiple buffer blocks along the extension direction of the beam body.

[0032] In the above technical solution, the compressive force on the buffer part can be distributed to multiple buffer blocks through the connecting part, and the compressive force on the local part of the buffer part is converted into the compressive force on the entire buffer part, thereby reducing the impact of the compressive force on the buffer part and improving the compression resistance of the box.

[0033] In some implementations, the buffer section is integrally formed with the main beam body.

[0034] In the above technical solutions, one-piece molding can reduce assembly steps and improve assembly efficiency.

[0035] In some implementations, the buffer section is fixedly connected to the main beam body.

[0036] In the above technical solution, the buffer section and the main beam are two independent entities. The position of the buffer section can be adjusted according to the position of the battery inside the box, thereby reducing the process error requirements of the buffer section and reducing the manufacturing cost of the buffer section.

[0037] In some embodiments, the buffer section includes multiple sub-buffer sections, which are spaced apart along the length of the beam body, and the gap between two adjacent sub-buffer sections forms an avoidance space.

[0038] In the above technical solution, dividing the buffer part into multiple sub-buffer parts allows the buffer parts to be placed in the box to adapt to different internal structures, avoids interference between the buffer parts and the internal structure of the box, and improves the utilization rate of the box.

[0039] Secondly, embodiments of this application provide a battery, including a housing of a plurality of batteries according to any of the embodiments of the first aspect; and a battery cell, housed within a housing space.

[0040] In some embodiments, a thermal management component is also included, housed in the housing space and used to regulate the temperature of the battery cells, and the housing includes a clearance structure in the buffer section of the housing for clearing the thermal management component.

[0041] In the above technical solution, the buffer is placed in the accommodating space adjacent to the thermal management component to protect the thermal management component, prevent the thermal management component from being deformed or damaged by the squeezing force, and improve the safety of the battery box.

[0042] In some embodiments, the thermal management component includes a plurality of spaced-apart heat exchange plates, with battery cells disposed between adjacent heat exchange plates; the buffer section includes a plurality of spaced-apart buffer blocks, and the clearance structure includes gaps between the buffer blocks for accommodating the ends of the heat exchange plates.

[0043] In the above technical solution, the end of the heat exchange plate protrudes from the buffer block. The buffer part's clearance structure can accommodate the protruding end of the heat exchange plate. Furthermore, the connecting part in the buffer part can protect the end of the heat exchange plate, reduce the impact of the extrusion pressure on the end of the heat exchange plate, and further improve the protection of the heat exchange plate by the buffer part.

[0044] In some embodiments, the thermal management component includes a manifold that connects multiple heat exchange plates; the buffer block includes a body and a clearance portion, the body being located on the side of the beam body away from the support plate, the clearance portion being located on the side of the body being closer to the support plate, and the clearance portion protruding from the beam body toward the receiving space; wherein the clearance structure includes a clearance space from the surface of the clearance portion to the surface of the body portion along the protruding direction, and the manifold is at least partially located within the clearance space.

[0045] In the above technical solution, the buffer section is adjacent to the manifold and is used to protect the manifold, reduce the impact of external extrusion pressure on the manifold, and improve the protection of the manifold by the buffer section. At the same time, the manifold is placed in the clearance space between the buffer section and the main body, and the main body can also absorb the extrusion pressure from the direction of the support section, thus protecting the manifold from the impact of extrusion pressure in multiple directions.

[0046] Thirdly, embodiments of this application provide an electrical device including a battery according to any embodiment of the second aspect, the battery being used to provide electrical energy. Attached Figure Description

[0047] 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.

[0048] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0049] Figure 2 Explosion diagrams of batteries provided for some embodiments of this application;

[0050] Figure 3 This is a schematic diagram of the structure of the battery housing provided in some embodiments of this application;

[0051] Figure 4 A schematic diagram of the structure of a buffer section of a battery housing provided in some embodiments of this application;

[0052] Figure 5 for Figure 3 Another schematic diagram of the battery box shown;

[0053] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of AA;

[0054] Figure 7 for Figure 4 Another perspective view of a buffer section of the battery box shown.

[0055] Figure 8 Explosion diagrams of batteries provided for some embodiments of this application;

[0056] Figure 9 This is a schematic diagram of the battery structure provided in some embodiments of this application;

[0057] Figure 10 For Figure 9 Schematic diagram of the cross-sectional structure of BB;

[0058] The accompanying drawings are not drawn to scale.

[0059] Marker explanation:

[0060] 1000, Vehicle; 2000, Battery; 2010, Housing; 2020, Battery Cell; 2030, Thermal Management Components; 2031, Heat Exchange Plate; 2032, Manifold; 3000, Controller; 4000, Motor;

[0061] 100. Support plate;

[0062] 200, Side beam; 210, Beam body; 220, Buffer section; 220a, Sub-buffer section; 221, Buffer block; 221a, Body section; 221b, Clearance section; 222, Clearance structure; 222a, Clearance; 222b, Clearance space;

[0063] X, extension direction; Y, protrusion direction; Z, thickness direction. Detailed Implementation

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] In this application, "multiple" means two or more (including two).

[0071] 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.

[0072] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer, which is coated on the surface of the positive current collector. The positive current collector includes a positive electrode coating area and a positive electrode tab connected to the coating area. The coating area is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery cell as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be polypropylene (PP) or polyethylene (PE), etc.

[0073] The battery cell also includes a casing, inside which a cavity is formed to house the electrode assembly. The casing protects the electrode assembly from external contaminants to prevent them from being affected by external objects during charging or discharging.

[0074] Individual battery cells are housed within a battery pack, which transmits their charge to external electrical appliances via circuitry. During use, the battery pack is subject to external impacts, causing it to deform and potentially damaging the individual battery cells inside.

[0075] In related technologies, the impact of external compressive forces is reduced by increasing the thickness of the enclosure. For example, the overall thickness of the frame within the enclosure can be increased, or materials with better energy absorption can be used to improve the enclosure's resistance to compression.

[0076] The inventors discovered that increasing the thickness of the frame to improve the compression resistance of the battery pack increases its weight, which is detrimental to the lightweight development of battery packs. Conversely, using materials with better energy absorption to improve the compression resistance of the battery pack increases its material costs, hindering large-scale production.

[0077] In view of this, this application provides a technical solution in which the battery casing includes a support plate and multiple side beams. The multiple side beams are connected to the support plate and enclose the support plate to form an accommodating space. At least one side beam includes a beam body and a buffer portion. The buffer portion protrudes from the beam body and extends along the length of the beam body towards the accommodating space, and is located on the side of the beam body away from the support plate. This technical solution reduces the compressive force on the side beam by adding a buffer portion, improving the compressive strength of the side beam, reducing the possibility of deformation or even damage to the battery cells inside the casing, and improving the safety of the battery casing. The buffer portion on the side of the side beam facing the accommodating space allows the buffer portion to absorb some of the external force after the casing is subjected to external pressure, reducing the pressure on the battery cells inside the casing.

[0078] The technical solutions described in the embodiments of this application are applicable to batteries and electrical devices that use batteries.

[0079] 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.

[0080] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0081] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Figure 2 This is an exploded schematic diagram of a battery provided for some embodiments of this application.

[0086] 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.

[0087] 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.

[0088] Figure 3 This is a schematic diagram of the structure of a battery housing 2010 provided in some embodiments of this application. Figure 4 This is a schematic diagram of the structure of a buffer section 220 of a battery housing 2010 provided in some embodiments of this application. Figure 5 for Figure 3 Another perspective view of the battery housing 2010 shown. Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure of AA. Figure 7 for Figure 4 Another schematic view of a buffer section 220 of the battery housing 2010 shown.

[0089] like Figures 3 to 7As shown, the battery box 2010 of this application embodiment includes a support plate 100 and a plurality of side beams 200 connected to the support plate 100 and enclosing the support plate 100 to form an accommodating space. At least one side beam 200 includes a beam body 210 and a buffer portion 220. The buffer portion 220 protrudes from the beam body 210 toward the accommodating space and extends along the length direction of the beam body 210. The buffer portion 220 is located on the side of the beam body 210 away from the support plate 100.

[0090] The support plate 100 is connected to multiple side beams 200. The support plate 100 can be connected to the multiple side beams 200 by any of the following methods: welding, riveting, screw fastening or structural adhesive bonding.

[0091] In some examples of this embodiment, the side beam 200 is a structural component made of aluminum profiles, such as welded or die-cast aluminum alloy profiles, which reduces the weight of the supporting frame while meeting structural strength requirements. Additionally, the support plate 100 is a plate made of aluminum alloy or carbon steel.

[0092] The buffer section 220 is located on the side of the beam body 210 away from the support plate 100 to avoid the battery cells 2020 in the housing space and improve the space utilization of the housing 2010. In some examples of this embodiment, the buffer section 220 may also be located on the side of the beam body 210 away from the support plate 100 to reduce the weak areas of the housing 2010 and improve the compression resistance of the housing 2010.

[0093] The buffer section 220 provides a buffering effect to the side beam 200, which can effectively absorb the compressive force transmitted from the side of the box 2010 to the side beam 200, thereby improving the compressive strength of the side beam 200.

[0094] In this embodiment, by adding a buffer portion 220 to the side beam 200, the compressive force on the side beam 200 is reduced, the compressive strength of the side beam 200 is improved, the possibility of the battery cells 2020 inside the housing 2010 being deformed or even damaged by compression is reduced, and the safety of the battery housing 2010 is improved. In this embodiment, a buffer portion 220 is provided on the side of the side beam 200 facing the accommodating space. This allows the buffer portion 220 to absorb a portion of the external force after the housing 2010 is subjected to external compression, reducing the compression of the battery cells 2020 inside the housing 2010.

[0095] In some embodiments, the buffer section 220 includes a plurality of buffer blocks 221 spaced apart along the length direction.

[0096] The buffer block 221 can be a cube, cuboid, frustum, or other structure. The buffer section 220 can be a solid or hollow structure.

[0097] In this embodiment, the provision of multiple buffer blocks 221 on the buffer section 220 can effectively reduce the weight that the buffer section 220 brings to the housing 2010, and the buffer blocks 221 can utilize the space between the housing 2010 and the internal battery cell 2020, thereby improving the utilization rate of the housing 2010.

[0098] In some embodiments, a plurality of buffer blocks 221 are arranged at equal intervals along the extension direction X of the beam body.

[0099] In this embodiment, multiple buffer blocks 221 are arranged at equal intervals to facilitate the fabrication of the buffer blocks 221 and reduce the difficulty of the manufacturing process.

[0100] In some embodiments, the distance between two adjacent buffer blocks 221 in the extension direction X of the beam body is L1, where 1mm ≤ L1 ≤ 1500mm; optionally, 5mm ≤ L1 ≤ 20mm.

[0101] In this embodiment, the smaller the distance between adjacent buffer blocks 221, the more buffer blocks 221 there are, and the greater the added weight of the buffer blocks 221, which is detrimental to the lightweight design of the housing 2010. Conversely, the larger the distance between adjacent buffer blocks 221, the fewer buffer blocks 221 there are, the less buffering effect they provide, and the lower the compression resistance of the housing 2010. In this embodiment, the distance between adjacent buffer blocks 221 is limited to 1mm ≤ L1 ≤ 1500mm to balance the lightweight design and compression resistance of the housing 2010.

[0102] In some embodiments, the buffer portion 220 further includes a clearance structure 222 for clearing away components housed in the housing space.

[0103] The clearance structure 222 is used to avoid the battery cell 2020, thermal management component 2030, etc. in the housing 2010. In other words, the clearance structure 222 is the clearance shape and clearance space 222b left by the buffer part 220 for the internal components of the housing 2010.

[0104] In this embodiment, the avoidance structure 222 allows the buffer section 220 to further utilize the gaps in the battery in the housing space, increasing the overall volume of the buffer section 220, enabling the buffer section 220 to absorb more external forces, and improving the compression resistance and space utilization of the housing 2010.

[0105] In some embodiments, the avoidance structure 222 includes a gap 222a between the buffer blocks 221.

[0106] In this embodiment, the gap 222a between adjacent buffer blocks 221 can be used to place various components of the battery in the housing 2010, avoiding interference between the buffer block 221 and the components in the accommodating space, and improving the space utilization of the buffer section 220.

[0107] In some embodiments, the buffer block 221 includes a body portion 221a and a clearance portion 221b extending from the body portion 221a toward the support plate 100. The clearance portion 221b protrudes from the beam body 210 toward the receiving space, wherein the thickness of the body portion 221a is greater than the thickness of the clearance portion 221b along the protrusion direction Y of the clearance portion 221b.

[0108] The main body 221a serves as the main buffer part 220 that resists compressive force. The side of the main body 221a abuts against the support plate 100, which enables the main body 221a to absorb part of the compressive force received by the support part and improve the overall compressive resistance of the box 2010.

[0109] A clearance portion 221b extends from the main body portion 221a on the side facing away from the support plate 100. The clearance portion 221b can be connected to the main body portion 221a by welding, bonding, or other methods. Alternatively, the clearance portion 221b can be integrally formed with the main body portion 221a. The shape of the clearance portion 221b can be a cube, cuboid, or the like.

[0110] In some examples of this embodiment, for ease of manufacturing, the body portion 221a and the clearance portion 221b may be made of the same material. In still other examples of this embodiment, in order to improve the compression resistance of the clearance portion 221b, the material used for the clearance portion 221b has better compression resistance than the material used for the body portion 221a.

[0111] In this embodiment, the thickness of the avoidance portion 221b is smaller than the thickness of the main body portion 221a, which can fill the area that the main body portion 221a cannot protect and where the internal gap 222a of the box 2010 is small, thereby increasing the protection area of ​​the buffer portion 220 and improving the compression resistance of the box 2010.

[0112] In some embodiments, the avoidance structure 222 further includes an avoidance space 222b extending from the surface of the avoidance portion 221b to the surface of the body portion 221a along the protruding direction Y.

[0113] In this embodiment, the clearance space 222b formed by the clearance part 221b and the main body part 221a is used to place the components inside the housing 2010 and to protect the components in the clearance space 222b, reducing the impact of external pressure on the components in the clearance space 222b.

[0114] In some embodiments, the thickness of the body portion 221a along the protruding direction Y is H1, where 5 mm ≤ H1 ≤ 100 mm.

[0115] In this embodiment, the smaller the thickness of the body portion 221a, the less external force it can absorb, and the lower its impact resistance. Conversely, the larger the thickness of the body portion 221a, the more space and weight it occupies, and the higher its cost. This embodiment limits the thickness of the body portion 221a to 5 mm ≤ H1 ≤ 100 mm to minimize its thickness while ensuring its impact resistance.

[0116] In some embodiments, the thickness of the clearance portion 221b along the protruding direction Y is H2, and H1 and H2 satisfy the relationship: 0.005≤H2 / H1<1.

[0117] In this embodiment, the smaller the ratio of the thickness of the avoidance portion 221b to the thickness of the main body portion 221a, the lower the impact resistance of the avoidance portion 221b. Conversely, the larger the ratio of the thickness of the avoidance portion 221b to the thickness of the main body portion 221a, the greater the space and weight occupied by the avoidance portion 221b, and the higher the cost. In this embodiment, the thickness of the avoidance portion 221b is limited to 0.005 ≤ H2 / H1 < 1, in order to minimize the thickness of the avoidance portion 221b as much as possible while ensuring its impact resistance.

[0118] In some embodiments, the height of the body portion 221a along the thickness direction Z of the support plate 100 is D1, where 10 mm ≤ D1 ≤ 100 mm.

[0119] In this embodiment, the lower the height of the body portion 221a, the lower its impact resistance. Conversely, the higher the height of the body portion 221a, the greater its space and weight, and the higher its cost. Therefore, the height of the body portion 221a is minimized as much as possible while ensuring its impact resistance.

[0120] In some embodiments, the height of the clearance portion 221b along the thickness direction Z of the support plate 100 is D2, 10 mm ≤ D1 ≤ 100 mm.

[0121] In this embodiment, the smaller the ratio of the height of the avoidance part 221b to the height of the main body 221a, the lower the impact resistance of the avoidance part 221b. Conversely, the larger the ratio of the height of the avoidance part 221b to the height of the main body 221a, the greater the space and weight occupied by the avoidance part 221b, and the higher the cost. Therefore, the height of the avoidance part 221b is minimized as much as possible while ensuring its impact resistance.

[0122] In some embodiments, the buffer portion 220 includes a connecting portion that connects a plurality of buffer blocks 221 along the extension direction X of the beam body.

[0123] In some examples of this embodiment, the connecting part can be connected to the buffer block 221 by means of bolts, welding, adhesive, etc. In still some examples of this embodiment, the connecting part can be integrally formed with the buffer block 221.

[0124] In this embodiment, the compressive force on the buffer part 220 can be distributed to multiple buffer blocks 221 through the connecting part, and the compressive force on the local part of the buffer part 220 is converted into the compressive force on the entire buffer part 220, thereby reducing the impact of the compressive force on the buffer part 220 and improving the compressive resistance of the box 2010.

[0125] In some embodiments, the buffer portion 220 is integrally formed with the beam body 210. The buffer portion 220 and the beam body 210 can be formed by casting, 3D printing, or other methods, which can reduce assembly steps and improve assembly efficiency.

[0126] In some embodiments, the buffer portion 220 is fixedly connected to the beam body 210.

[0127] The buffer section 220 can be connected to the main beam 210 by means of bolts, welding, adhesive, etc.

[0128] In this embodiment, the buffer section 220 and the main beam 210 are two independent entities. The position of the buffer section 220 can be adjusted according to the position of the battery inside the housing 2010, thereby reducing the process error requirements of the buffer section 220 and reducing the manufacturing cost of the buffer section 220.

[0129] Please see Figure 3 In some embodiments, the buffer section 220 includes a plurality of sub-buffer sections 220a, which are spaced apart along the length of the beam body, and the gap 222a between two adjacent sub-buffer sections 220a forms an avoidance space 222b.

[0130] Multiple sub-buffer sections 220a can be installed on the same beam body 210. The lengths of any two sub-buffer sections 220a extending along the length direction of the beam body can be the same to facilitate the installation between the buffer section 220 and the side beam 200. The lengths of any two sub-buffer sections 220a extending along the length direction of the beam body can be different, allowing for more flexible avoidance of components within the housing 2010.

[0131] In this embodiment, dividing the buffer section 220 into multiple sub-buffer sections 220a allows the buffer section 220 to be placed in the housing 2010 to adapt to different internal structures, avoids interference between the buffer section 220 and the internal structure of the housing 2010, and improves the utilization rate of the housing 2010.

[0132] Figure 8 This is an exploded schematic diagram of a battery provided for some embodiments of this application. Figure 9 This is a schematic diagram of the battery structure provided in some embodiments of this application. Figure 10 For Figure 9 A schematic diagram of the cross-sectional structure of BB.

[0133] In some embodiments, this application also provides a battery including a battery housing 2010 and a battery cell 2020 of any of the above embodiments. The battery cell 2020 is housed within a housing space.

[0134] In some embodiments, the battery further includes a thermal management component 2030, which is housed in a housing space and used to regulate the temperature of the battery cell 2020, and the housing 2010 includes a clearance structure 222 for clearing the thermal management component 2030.

[0135] In this embodiment, the buffer 220 is placed in the accommodating space adjacent to the thermal management component 2030 to protect the thermal management component 2030 from deformation or damage caused by compressive force, thereby improving the safety of the battery box 2010.

[0136] In some embodiments, the thermal management component 2030 includes a plurality of spaced heat exchange plates 2031, with battery cells 2020 disposed between adjacent heat exchange plates 2031. The buffer portion 220 includes a plurality of spaced buffer blocks 221, and the clearance structure 222 includes a gap 222a between the buffer blocks 221, the gap 222a being used to accommodate the ends of the heat exchange plates 2031.

[0137] In this embodiment, the end of the heat exchange plate 2031 protrudes from the buffer block 221. The avoidance structure 222 of the buffer part 220 can accommodate the protruding end of the heat exchange plate 2031. Furthermore, the connecting part in the buffer part 220 can protect the end of the heat exchange plate 2031, reduce the impact of the compressive force on the end of the heat exchange plate 2031, and further improve the protection of the heat exchange plate 2031 by the buffer part 220.

[0138] In some embodiments, the thermal management component 2030 includes a manifold 2032 that connects multiple heat exchange plates 2031; the buffer block 221 includes a body portion 221a and a clearance portion 221b, the body portion 221a being located on the side of the beam body away from the support plate 100, and the clearance portion 221b being located on the side of the body portion 221a close to the support plate 100, and the clearance portion 221b protruding out of the beam body 210 toward the receiving space; wherein, the clearance structure 222 includes a clearance space 222b extending from the surface of the clearance portion 221b to the surface of the body portion 221a along the protruding direction Y, and the manifold 2032 is at least partially located within the clearance space 222b.

[0139] In this embodiment, the buffer portion 221b in the buffer portion 220 is adjacent to the manifold 2032, which protects the manifold 2032, reduces the impact of external extrusion on the manifold 2032, and improves the protection of the manifold 2032 by the buffer portion 220. At the same time, the manifold 2032 is placed in the clearance space 222b between the buffer portion 221b and the main body portion 221a. The main body portion 221a can also absorb the extrusion from the support portion, thus protecting the manifold 2032 from the impact of extrusion in multiple directions.

[0140] In some embodiments, this application provides an electrical device including a battery according to any of the second aspects, the battery being used to provide electrical energy.

[0141] In some embodiments, refer to Figures 3 to 7 This application provides a battery housing 2010, which includes a support plate 100 and a plurality of side beams 200. The plurality of side beams 200 are connected to the support plate 100 and enclose the support plate 100 to form an accommodating space. Among them, two opposing side beams 200 include a beam body 210 and a buffer portion 220. The buffer portion 220 protrudes from the beam body 210 toward the accommodating space and extends along the length direction of the beam body 210. The buffer portion 220 is located on the side of the beam body 210 away from the support plate 100.

[0142] The buffer section 220 includes buffer blocks 221, clearance structures 222, and connecting portions. Multiple buffer blocks 221 are spaced apart along their length by gaps 222a. Each buffer block 221 includes a body portion 221a and a clearance portion 221b extending from the body portion 221a toward the support plate 100. The clearance portion 221b protrudes from the beam body 210 toward the receiving space, wherein the thickness of the body portion 221a is greater than the thickness of the clearance portion 221b along the protrusion direction Y of the clearance portion 221b. The connecting portions connect the multiple buffer blocks 221 along the extension direction X of the beam body. The buffer section 220 includes a first sub-buffer section 220a and a second sub-buffer section 220b, which are spaced apart along the extension direction X of the beam body. The avoidance structure 222 includes a gap 222a between buffer blocks 221, an avoidance space 222b from the surface of the avoidance portion 221b to the surface of the main body portion 221a along the protruding direction Y, and an avoidance space 222b formed by the gap 222a between the first sub-buffer portion 220a and the second sub-buffer portion 220b.

[0143] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0144] 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 battery casing, characterized in that, include: Support plate; as well as Multiple side beams are connected to the support plate and enclose the support plate to form an accommodating space. Wherein, at least one of the side beams includes a beam body and a buffer portion, the buffer portion protruding from the beam body toward the receiving space and extending along the length direction of the beam body, the buffer portion being located on the side of the beam body away from the support plate; The buffer section and the main beam body are two independent entities, but are fixedly connected. The main beam body has multiple cavities, and a portion of the multiple cavities are stacked with the buffer section along the protruding direction, which intersects the length direction. The buffer section includes a connecting section and multiple buffer blocks spaced apart along the length direction. The connecting section connects the multiple buffer blocks along the extension direction of the main beam body, and the connecting section and the buffer blocks are integrally formed.

2. The housing according to claim 1, characterized in that, The plurality of buffer blocks are arranged at equal intervals along the extension direction of the main beam body.

3. The housing according to claim 2, characterized in that, In the extending direction of the main beam, the distance between two adjacent buffer blocks is L1, where 1mm ≤ L1 ≤ 1500mm.

4. The housing according to claim 3, characterized in that, The spacing L1 between two adjacent buffer blocks satisfies the following relationship: 5mm ≤ L1 ≤ 20mm.

5. The housing according to claim 1, characterized in that, The buffer section also includes a clearance structure for clearing components housed in the housing space.

6. The housing according to claim 5, characterized in that, The avoidance structure includes a gap between two adjacent buffer blocks.

7. The housing according to claim 5, characterized in that, The buffer block includes a main body and a clearance portion extending from the main body toward the support plate, the clearance portion being provided to protrude from the beam body toward the receiving space; Wherein, along the protruding direction of the avoidance portion, the thickness of the main body portion is greater than the thickness of the avoidance portion.

8. The housing according to claim 7, characterized in that, The avoidance structure also includes an avoidance space from the surface of the avoidance portion to the surface of the body portion along the protruding direction.

9. The housing according to claim 7, characterized in that, The thickness of the main body along the protruding direction is H1, where 5mm ≤ H1 ≤ 100 mm.

10. The housing according to claim 9, characterized in that, The thickness of the avoidance portion along the protruding direction is H2, and H1 and H2 satisfy the relationship: 0.005≤H2 / H1<1.

11. The housing according to claim 7, characterized in that, The height of the main body along the thickness direction of the support plate is D1, where 10 mm ≤ D1 ≤ 100 mm.

12. The housing according to claim 7, characterized in that, The height of the clearance portion along the thickness direction of the support plate is D2, where 10 mm ≤ D2 ≤ 100 mm.

13. The housing according to any one of claims 1-12, characterized in that, The buffer section includes multiple sub-buffer sections, which are spaced apart along the length direction of the beam body, and the gap between two adjacent sub-buffer sections forms an avoidance space.

14. A battery, characterized in that, include: The housing according to any one of claims 1 to 13; as well as The battery cell is housed within the housing space.

15. The battery according to claim 14, characterized in that, It also includes a thermal management component housed in the housing space and used to regulate the temperature of the battery cell, and the housing includes a clearance structure for avoiding the thermal management component.

16. The battery according to claim 15, characterized in that, The thermal management component includes a plurality of heat exchange plates spaced apart, and the battery cells are disposed between adjacent heat exchange plates; The buffer section includes a plurality of buffer blocks spaced apart, and the clearance structure includes gaps between the buffer blocks, the gaps being used to accommodate the ends of the heat exchange plate.

17. The battery according to claim 16, characterized in that, The thermal management component includes a manifold that connects multiple heat exchange plates; The buffer block includes a main body and a clearance part. The main body is located on the side of the beam body away from the support plate, and the clearance part is located on the side of the main body closer to the support plate. The clearance part protrudes from the beam body toward the accommodating space. The avoidance structure includes an avoidance space from the surface of the avoidance portion to the surface of the body portion along the protruding direction, and at least a portion of the manifold is located within the avoidance space.

18. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 14-17, the battery being used to provide electrical energy.

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