Case, battery, and electric device

Abstract

A case (100), a battery (300), and an electric device (400). The case (100) comprises a frame (10) and a support plate (20). The support plate (20) comprises a plurality of structural plates and a buffer plate (23) arranged between every two adjacent structural plates. At least one structural plate is connected to the frame (10). The buffer plate (23) comprises a plate body (231) and a reinforcing plate (232) arranged in a gap of the plate body (231), and the reinforcing plate (232) is at least used for filling the gap of the plate body (231) in the width direction of the support plate (20).

Description

Box, battery and electrical equipment

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202421169180.1, filed on May 27, 2024, entitled "Box, Battery and Electrical Equipment". Technical Field

[0003] This application relates to the field of battery technology, and in particular to a housing, a battery, and an electrical device. Background Technology

[0004] In related technologies, the enclosure is suitable for housing individual battery cells, and a buffer structure can be set on the support plate (i.e., the bottom plate) of the enclosure to improve the structural strength and stability of the enclosure.

[0005] However, the lateral strength of the current support plate of the box body cannot meet the structural strength requirements and needs to be further improved.

[0006] Summary of the Invention

[0007] This application aims to at least solve one of the technical problems existing in the prior art. To this end, embodiments of this application propose a housing, a battery, and an electrical device, which can improve the reliability of the housing, the battery, and the electrical device.

[0008] A box body includes: a frame and a support plate. The support plate is disposed on one side of the frame and encloses an accommodating space with the frame. The support plate includes: a multi-layer structural plate and a buffer plate disposed between adjacent structural plates. At least one structural plate is connected to the frame. The buffer plate includes: a plate body and a reinforcing plate disposed in the gap of the plate body. The reinforcing plate is used to fill at least the gap of the plate body in the width direction of the support plate.

[0009] Therefore, the support plate adopts an integrated composite plate structure of structural plate and buffer plate, which not only simplifies the box structure, reduces installation difficulty and the number of sealing interfaces, thereby reducing the sealing cost and production cost of the box, but also improves the structural strength and rigidity of the box, thereby improving the bottom contour of the box, improving the reliability and stability of the box, and extending the service life of the box. More importantly, by setting the reinforcing plate, the lateral stiffness and lateral impact resistance of the box can be further improved, improving side collision performance and improving the safety of use.

[0010] According to some embodiments of this application, the plate body includes a plurality of sub-plates, which are spaced apart at least in the length direction of the support plate, and a gap is defined between adjacent sub-plates to accommodate the reinforcing plate.

[0011] According to some embodiments of this application, a plurality of groove structures are provided on the plate body, and the groove structures define gaps to accommodate the reinforcing plate.

[0012] According to some embodiments of this application, each groove structure includes: a first groove extending along the length direction of the support plate and a second groove extending along the width direction of the support plate, wherein the first groove and the second groove of the same groove structure are connected, and at least the second groove is provided with a reinforcing plate.

[0013] According to some embodiments of this application, the accommodating space is suitable for accommodating battery cells, and multiple battery cells are arranged in a single cell row in the width direction, with the length dimension of the single cell row in the width direction being L1, and the length of the reinforcing plate in the width direction being L2, where L2 > L1.

[0014] According to some embodiments of this application, the number of reinforcing plates in the length direction is less than or equal to five.

[0015] According to some embodiments of this application, the spacing between adjacent reinforcing plates in the length direction of the support plate is greater than or equal to 100 mm.

[0016] According to some embodiments of this application, the width of the reinforcing plate is 15mm to 100mm.

[0017] According to some embodiments of this application, a plurality of reinforcing plates include a first reinforcing plate disposed relative to the length midline of a support plate and a second reinforcing plate disposed relatively away from the length midline, wherein the width dimension of the first reinforcing plate is greater than the width dimension of the second reinforcing plate.

[0018] According to some embodiments of this application, the plate body is constructed as a porous structure.

[0019] According to some embodiments of this application, the holes on the plate body extend along the relative directions of adjacent structural plates.

[0020] According to some embodiments of this application, the plate body is constructed of a plastic material or a metal material; when the plate body is constructed of a plastic material, the plate body and the structural plate are heat-fused and pressed together; when the plate body is constructed of a metal material, the plate body and the structural plate are brazed together.

[0021] According to some embodiments of this application, when the plate body is constructed of plastic material, adhesive film layers are provided on both sides of the plate body.

[0022] According to some embodiments of this application, the structural plate includes: a first structural plate to an Nth structural plate arranged sequentially in the arrangement direction of the frame and the support plate, where N≥2, and at least the first structural plate and the Nth structural plate are connected to the frame.

[0023] According to some embodiments of this application, a connecting flange is provided on the side of the frame facing the support plate, and the width of the plate body is smaller than the width of the structural plate to define the slot, and the connecting flange extends into the slot; or the connecting flange overlaps the first structural plate.

[0024] According to some embodiments of this application, the minimum overlap dimension between the structural plate and the connecting flange in the width and length directions is 6 mm.

[0025] According to some embodiments of this application, the width of the first structural plate is smaller than the width of the Nth structural plate, and the first structural plate is connected to the connecting flange, while the Nth structural plate is connected to the end face of the frame; or the width of the first structural plate is equal to the width of the Nth structural plate, and both the first structural plate and the Nth structural plate are connected to the connecting flange.

[0026] A battery includes: the housing described in the above embodiments.

[0027] An electrical device includes: the battery described in the above embodiments.

[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0030] Figure 1 is a schematic diagram of an electrical device according to an embodiment of this application;

[0031] Figure 2 is a schematic diagram of a battery according to an embodiment of this application;

[0032] Figure 3 is a schematic diagram of the disassembled box according to an embodiment of this application;

[0033] Figure 4 is a schematic diagram of the support plate according to an embodiment of this application;

[0034] Figure 5 is a schematic diagram of a plate body structure according to the first embodiment of the application;

[0035] Figure 6 is a schematic diagram of another plate body structure according to the first embodiment of this application;

[0036] Figure 7 is a schematic diagram of the plate body structure according to the second embodiment of this application;

[0037] Figure 8 is a partial schematic diagram of the cooperation between a support plate and a frame according to an embodiment of this application;

[0038] Figure 9 is a partial schematic diagram of the cooperation between a support plate and a frame according to another embodiment of this application;

[0039] Figure 10 is a partially enlarged schematic diagram of the plate body according to an embodiment of this application;

[0040] Figure 11 is a cross-sectional view of a reinforcing plate according to an embodiment of this application;

[0041] Figure 12 is a cross-sectional view of another reinforcing plate according to an embodiment of this application;

[0042] Figure 13 is a cross-sectional view of another type of reinforcing plate according to an embodiment of this application. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0050] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0051] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0052] In this application, "multiple" means two or more (including two).

[0053] A single battery cell can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged after it has been discharged, allowing the active materials to be activated and the cell to continue to be used.

[0054] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this utility model embodiment is not limited to this.

[0055] The battery mentioned in the embodiments of this utility model refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed through a busbar.

[0056] In some embodiments, multiple battery cells can be combined to form a battery unit or a battery cluster. That is, when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery unit.

[0057] In some embodiments, the battery includes a housing and battery cells, with at least one battery cell or at least one battery unit housed in the housing, the housing having a receiving space, and at least one battery cell or at least one battery unit housed in the receiving space.

[0058] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0059] In some embodiments, the battery or battery cell may be part of an energy storage system. The energy storage system may be an energy storage container, an energy storage cabinet, etc., which integrates batteries and an energy shutdown module.

[0060] The development of battery technology must take into account multiple design factors, such as energy density, cycle life, discharge capacity, charge / discharge rate, and other performance parameters. In addition, battery safety performance also needs to be considered.

[0061] The technical solutions described in this utility model embodiment are applicable to batteries and electrical devices that use batteries.

[0062] Electrical equipment 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 embodiment of the utility model does not impose any special limitations on the above-mentioned electrical equipment.

[0063] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0064] Please refer to Figure 1, which is a structural schematic diagram of a vehicle provided in some embodiments of this utility model. A battery 300 is installed inside the vehicle, and the battery 300 can be located at the bottom, front, or rear of the vehicle. The battery 300 can be used to power the vehicle; for example, the battery 300 can serve as the vehicle's operating power source.

[0065] The vehicle may also include a controller 500 and a motor 600. The controller 500 controls the battery 300 to supply power to the motor 600, which serves as a load, for example, to meet the power requirements of the vehicle during starting, navigation, and driving.

[0066] In some embodiments of this utility model, the battery 300 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0067] Please refer to Figure 2, which is an exploded view of a battery 300 provided in some embodiments of the present invention. The battery 300 includes a battery cell 201 and a housing 100, the housing 100 being used to house the battery cell 201.

[0068] The housing 100 is a component that houses the battery cells 201. The housing 100 provides placement space for multiple battery cells 2011 within the battery cells 201. The housing 100 can adopt various structures. In some embodiments, the housing 100 may include a cover plate 30 and a housing body, with the cover plate 30 and the housing body overlapping each other to define placement space for accommodating the battery cells 2011. The tray and housing body can be of various shapes, such as cuboids, cylinders, etc. The housing body can be a hollow structure with one open side, and the cover plate 30 covers the open side of the housing body, thus forming the housing 100 with placement space. As an example, the battery cells 2011 can be cylindrical battery cells, prismatic battery cells, pouch battery cells, or other shaped battery cells 2011; this invention does not impose any particular limitations.

[0069] In battery 300, there can be one or more battery cells 2011. If there are multiple battery cells 2011, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 2011 are connected in both series and parallel. Alternatively, multiple battery cells 2011 can be first connected in series, parallel, or in a mixed configuration to form a battery unit 201, and then the multiple battery units 2011 can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the casing 100. Another option is that all battery cells 2011 can be directly connected in series, parallel, or in a mixed configuration, and then the whole consisting of all battery cells 2011 is housed within the casing 100.

[0070] In the battery 300, a heat exchanger 700 can be provided on the casing body (including the frame 10 and the support plate 20) or the cover plate 30. The heat exchanger 700 can be disposed between the multiple battery cells 2011 and the top wall of the casing 100, between the multiple battery cells 2011 and the bottom wall of the casing 100, between the bottom wall of the casing 100 and the bottom protective plate, or between two adjacent battery cells 2011, to provide heat exchange for the multiple battery cells 2011. In the embodiments of this application, the heat exchanger 700 may include a heat exchange tube integrated within the support plate 20, or disposed outside the support plate 20, wherein the heat exchange tube may be a flat tube, a round tube, a harmonica tube, or other shaped tube.

[0071] The battery cell 2011 serves as the smallest energy unit of the battery unit 201 and the battery 300. The battery unit 201 or the battery 300 includes multiple battery cells 2011. Each battery cell 2011 includes a large surface defined by the width and length edges of the battery cell 2011, a small surface defined by the width and height edges of the battery cell, and a terminal surface defined by the length and width edges of the battery cell. In order to enable the battery cell 2011 to be used in cold environments, an additional heat film can be attached to the surface of the battery cell 2011 (such as the large surface, small surface, or terminal surface) to heat the battery cell 2011. At the same time, a cooling structure can be provided corresponding to the large surface, small surface, or terminal surface of the battery cell to cool and reduce the temperature of the battery cell 2011, thereby cooling and reducing the temperature of the entire battery 300. Of course, a heat exchange structure can also be provided on the large surface, small surface, or terminal surface of the battery cell to achieve both cooling and heating.

[0072] In the existing technology, the heat exchange plate can be set on the bottom surface of the housing 100. It is necessary to set up a sealing structure that cooperates with the heat exchange plate, such as a sealing gasket, a mounting structure, and an installation structure. This results in a complex overall structure of the battery 300, a large number of parts, cumbersome installation, and high cost. The number of sealing interfaces between the heat exchange plate and the housing 100 is also large, resulting in higher sealing costs. The heat exchange plate uses a lot of material and has a complex process, which also increases costs. At the same time, both the bottom plate and the heat exchange plate are planar structures. The bottom plate is used for load-bearing and the heat exchange plate needs to be set on it, which reduces the bottom profile of the housing 100, resulting in a poor bottom profile of the housing 100. In addition, the bottom plate has poor resistance to lateral impact, as shown in the figure, with poor impact resistance in the X and Y directions, which makes it difficult to meet safety requirements.

[0073] This utility model embodiment provides a housing 100. The bottom plate (i.e., support plate 20) of the housing 100 is constructed as a multi-layered plate structure. A buffer plate 23 is set between adjacent structural plates. A heat exchanger 700 is set below the uppermost structural plate. The support plate 20 is constructed as an integrated plate structure, eliminating the need for a separate heat exchanger structure. On the one hand, this simplifies the structure of the housing 100, making the overall structure of the battery 300 simpler, with fewer parts, easier installation, and lower cost. It also reduces the number of sealing components and sealing interfaces, thereby reducing sealing costs and improving sealing performance. On the other hand, the buffer plate 23 can improve the structural strength and rigidity of the support plate 20. The weight of the heat exchanger 700 set in the support plate 20 is much lower than the weight of the heat exchanger structure, which can reduce the load on the support plate 20 and improve the structural rigidity of the support plate 20. This improves the bottom contour of the housing 100, making the bottom surface of the housing 100 flatter, reducing the probability of scratches and bottoming out, extending service life, and increasing stability.

[0074] By setting up the reinforcement plate 232 structure, the lateral protection capability of the support plate 20 can be improved, thereby enhancing the safety of use.

[0075] The housing 100, battery 300, and electrical device 400 according to embodiments of this application are described below with reference to Figures 1-13.

[0076] As shown in Figures 3 and 4, this application embodiment provides a box 100, including: a frame 10 and a support plate 20. The support plate 20 is disposed on one side of the frame 10 and forms an accommodating space with the frame 10. The support plate 20 includes: a multi-layer structural plate and a buffer plate 23 disposed between adjacent structural plates. At least one structural plate is connected to the frame 10.

[0077] Taking the front-to-back direction (length direction) (i.e., the X direction in the figure), the left-to-right direction (width direction) (i.e., the Y direction in the figure), and the up-down direction (height direction) of the housing 100 as examples, the housing 100 of this application embodiment will be specifically described.

[0078] The frame 10 is generally a rectangular frame and has a first opening and a second opening opposite each other in the height direction. The support plate 20 is set at the bottom of the frame 10 and is suitable for blocking the first opening. The box 100 can also be provided with a cover plate 30, which is suitable for blocking the second opening, so that the box 100 forms a selectively openable and closable accommodating space, which is suitable for accommodating components such as battery cell 2011 and battery management unit 300.

[0079] The support plate 20 can be constructed as a sandwich plate structure or a multi-layer sandwich plate structure, including at least two structural plates, and a buffer plate 23 can be provided between adjacent structural plates. The support plate 20 can also include a heat exchanger 700 provided on the side of the structural plate adjacent to the accommodating space away from the frame 10. The heat exchanger 700 can be provided on the lower surface of the uppermost structural plate (i.e. the side of the structural plate adjacent to the accommodating space away from the frame 10) to improve the structural strength and rigidity of the support plate 20 through the buffer plate 23. The temperature regulation (e.g., heating or cooling) of the battery cell 2011 can be realized through the heat exchanger 700 provided inside the support plate 20.

[0080] The support plate 20, which is the bottom plate of the housing 100, integrates the structural plate, heat exchanger 700, and buffer plate 23 into a composite plate. This eliminates the need for separate heat exchangers, thus integrating thermal management functions. It also eliminates the need for corresponding mounting, installation, and sealing structures for matching heat exchangers, simplifying the structure of the housing 100, reducing installation difficulty and cost, and improving the reliability of the housing 100. Furthermore, it reduces the number of sealing interfaces, forming only between the frame 10 and the support plate 20, making sealing easier and cheaper. The buffer plate 23 enhances the structural rigidity and strength of the support plate 20, resulting in a smoother and more defined lower surface of the housing 100, reducing the probability of scratches and bottoming out, improving the stability and reliability of the housing 100, and extending its service life.

[0081] The buffer plate 23 may include: a plate body 231 and a reinforcing plate 232 disposed in the gap of the plate body 231, the reinforcing plate 232 being used at least to fill the gap of the plate body 231 in the width direction of the support plate 20.

[0082] A gap refers to a slot in the plate body 231 or a gap defined between adjacent plate bodies 231. The gap may include a first gap in the width direction of the support plate 20 and a second gap in the length direction of the support plate 20. Reinforcing plates 232 may be provided in both the first gap and the second gap to enhance the impact resistance (i.e., side impact performance) of the support plate 20 in the length direction and / or the width direction.

[0083] The housing 100, serving as the enclosure for the battery cell 2011, needs to be located at the bottom of the vehicle or other electrical equipment 400. When subjected to impacts in the front-to-back direction, it can be buffered and protected by structures such as anti-collision beams. However, in the event of a side impact, it can only withstand the impact through the frame 10, which has poor resistance to side impacts and is prone to thermal runaway, thus reducing safety. This application fills the gaps in the width direction with reinforcing plates 232 to enhance the lateral stiffness and lateral strength of the housing 100 in the width direction, thereby improving the side impact resistance of the housing 100 in the environment of use such as the battery 300 in a vehicle and improving the safety of use.

[0084] According to the embodiment of this application, the support plate 20 of the enclosure 100 adopts an integrated composite plate structure of structural plate and buffer plate 23. This not only simplifies the structure of the enclosure 100, reduces installation difficulty and the number of sealing interfaces, thereby reducing the sealing cost and production cost of the enclosure 100, but also improves the structural strength and rigidity of the enclosure 100, thereby improving the bottom contour of the enclosure 100, improving the reliability and stability of the enclosure 100, and extending the service life of the enclosure 100. More importantly, by setting the reinforcing plate 232, the lateral rigidity and lateral impact resistance of the enclosure 100 can be further improved, the side collision performance can be improved, and the safety of use can be improved.

[0085] As shown in Figures 11, 12, and 13, the reinforcing plate 232 can be a roll-formed, stamped, composite pultruded, or profiled structure. The reinforcing plate 232 can be a solid plate, a hollow plate, or a hollow beam-supported plate to improve the lateral stiffness of the supporting plate 20. The structural plate can be made of steel or aluminum. The frame 10 is constructed as a profile frame, and the structural plate can be fixed to the frame by welding (brazing, laser welding, etc.), riveting, etc. The thickness of the structural plate can be selected based on the connection method. If welding is used, the thickness of the structural plate is selected based on the welding requirements of the welding method. If FSW welding process is used, the thickness should not be less than 1.5 mm. If cold connection (such as riveting) is used, the thickness of the structural plate is not specifically limited. The thickness of multi-layer structural plates can be the same or different.

[0086] The gap formed on the plate body 231 can be formed by slotting on the plate body 231 and further embedding the reinforcing plate 232, or the plate body 231 can be constructed as a split structure with multiple sub-plate bodies 2311, with adjacent sub-plate bodies 2311 facing each other and spaced apart, and the gap between adjacent sub-plate bodies 2311 forming a gap, and the reinforcing plate 232 is embedded in the gap.

[0087] As shown in Figures 5 and 6, in the first embodiment, according to some embodiments of this application, the plate body 231 includes a plurality of sub-plate bodies 2311, the plurality of sub-plate bodies 2311 are spaced apart at least in the length direction of the support plate 20, and a gap is defined between adjacent sub-plate bodies 2311 to accommodate the reinforcing plate 232.

[0088] Multiple sub-plates 2311 can be arranged sequentially at intervals along the length of the support plate 20, or sequentially at intervals along both the length and width directions, so as to improve the stiffness of the support plate 20 in the length direction at least by means of the reinforcing plate 232.

[0089] The buffer plate 23 is formed by splicing the sub-plate 2311 and the reinforcing plate 232. The lateral stiffness of the buffer plate 23 can be increased by the reinforcing plate 232, thereby improving the structural strength and safety of the support plate 20.

[0090] In embodiments where multiple sub-plates 2311 are arranged in an array, the reinforcing plate 232 can be formed as a grid plate structure.

[0091] In the second embodiment, as shown in FIG7, according to some embodiments of this application, a plurality of groove structures 233 may be provided on the plate body 231, and the groove structures 233 define gaps to accommodate the reinforcing plate 232.

[0092] By creating a groove structure 233 along the length direction, the reinforcing plate 232 is embedded, which improves the structural strength and rigidity of the support plate 20 while also improving the integrity of the plate body 231, reducing the number of parts, and making assembly easier.

[0093] As shown in Figure 6, according to some embodiments of this application, each groove structure 233 includes: a first groove 2331 extending along the length direction of the support plate 20 and a second groove 2332 extending along the width direction of the support plate 20. The first groove 2331 and the second groove 2332 of the same groove structure 233 are connected, and at least the second groove 2332 is provided with a reinforcing plate 232.

[0094] The groove structure 233 may include multiple H-shaped grooves, I-shaped grooves, or be formed as a whole into a grid groove, so that reinforcing plates 232 can be embedded in both the length and width directions of the plate body 231 to improve the structural strength and structural rigidity of the support plate 20.

[0095] According to some embodiments of this application, the accommodating space is suitable for accommodating battery cells 2011, and multiple battery cells 2011 are arranged in a cell row 2012 in the width direction, and the length of the cell row 2012 in the width direction is L1, and the length of the reinforcing plate 232 in the width direction is L2, where L2 > L1.

[0096] Multiple battery cells 2011 can be arranged in an array within the accommodating space, that is, arranged in columns in the length direction and in rows in the width direction. Each row of battery cells 2011 is defined as a cell row 2012. The length L1 of the cell row 2012 and the length L2 of the reinforcing plate 232 in the width direction satisfy L2 > L1. That is, both ends of the reinforcing plate 232 can protrude from the cell row 2012 so that the reinforcing plate 232 can preferentially absorb the impact force, thereby protecting the battery cells 2011, reducing the probability of thermal runaway, and improving safety.

[0097] According to some embodiments of this application, the number of reinforcing plates 232 in the length direction is less than or equal to five.

[0098] The number of reinforcing plates 232 can be 1, 2, 3, 4 or 5. The placement of the reinforcing plates 232 can be set according to the arrangement of the enclosure 100 and the areas prone to side collisions in the actual use environment, so as to make the placement of the reinforcing plates 232 more reasonable.

[0099] The number of reinforcing plates 232 should be less than or equal to five. While improving the side impact resistance and the lateral stiffness of the box 100, the number of reinforcing plates 232 is more reasonable, the integrity of the support plate 20 is better, the flatness control accuracy of the integrated composite plate structure is higher, the contour of the support plate 20 after molding is higher, and the reliability and stability are higher.

[0100] According to some embodiments of this application, in the length direction of the support plate 20, the interval between adjacent reinforcing plates 232 is greater than or equal to 100 mm.

[0101] If the length of the support plate 20 is 500mm, then four reinforcing plates 232 can be arranged, and the distance between adjacent reinforcing plates 232 is 100mm.

[0102] While improving the structural strength and rigidity of the support plate 20, the distance between adjacent reinforcing plates 232 is more reasonable. This can also take into account the structural strength and rigidity of the support plate 20 in the relative direction (i.e., the height direction) of the structural plate, and can improve the support effect of the support plate 20 on the battery cell 2011, thereby improving stability and reliability.

[0103] According to some embodiments of this application, the width of the reinforcing plate 232 is 15mm to 100mm.

[0104] The width of the reinforcing plate 232 is 15mm, 20mm, 30mm, 50mm, 80mm, 100mm, etc. Different widths of the reinforcing plate 232 can be selected according to the side impact strength level. The width of the reinforcing plate 232 is not less than 15mm, so that the lateral stiffness improvement effect of the reinforcing plate 232 is stable and reliable. The width of the reinforcing plate 232 does not exceed 100mm, so as to take into account the lightweight requirements of the support plate 20.

[0105] According to some embodiments of this application, a plurality of reinforcing plates 232 include a first reinforcing plate disposed relative to the length midline of the support plate 20 and a second reinforcing plate disposed relatively away from the length midline, wherein the width dimension of the first reinforcing plate is greater than the width dimension of the second reinforcing plate.

[0106] The length centerline of the support plate 20 refers to the straight line that divides the support plate 20 into equal parts along its length.

[0107] If there are three reinforcing plates 232, one reinforcing plate 232 near the length midline is the first reinforcing plate, and the other two are the second reinforcing plates. The width of the first reinforcing plate is 50mm, and the width of the second reinforcing plate is 30mm. In an embodiment where there are five reinforcing plates 232, one near the opposite length midline is the first reinforcing plate, and the other four are the second reinforcing plates. The width of the first reinforcing plate is 70mm. Among the other four second reinforcing plates, the width of the reinforcing plate 232 adjacent to the length midline is greater than the width of the reinforcing plate 232 away from the length midline, such as 50mm and 30mm respectively.

[0108] The peripheral edge of the support plate 20 is connected to the frame, which makes the lateral stiffness of the center line region lower than that of the edge region. The reinforcing plate 232 adjacent to the center line region is wider, while the reinforcing plate 232 far from the center line region is narrower. Through the differentiated setting of the reinforcing plate 232, the lateral stiffness of the support plate 20 is made more consistent, while the weight reduction can also be taken into account.

[0109] As shown in Figure 10, according to some embodiments of this application, the plate body 231 is constructed as a porous structure.

[0110] The porous structure can be a honeycomb structure, a round hole structure, or a square hole structure. It can be densely laid in a plane defined by the length and width directions. By setting a porous structure, not only can the weight of the plate body 231 be reduced to improve the load on the support plate 20 and improve the contour of the bottom surface of the support plate 20, but the structural strength and rigidity of the support plate 20 can also be further improved.

[0111] According to some embodiments of this application, the holes on the plate body 231 extend along the relative directions of adjacent structural plates.

[0112] The hole structure of the plate body 231 extends in the vertical direction so that the plate body 231 can provide support for the upper structural plate between adjacent structural plates and realize smooth and uniform mechanical transmission between the upper and lower structural plates, so as to further improve the structural strength and rigidity of the support plate 20.

[0113] According to some embodiments of this application, the plate body 231 is constructed of a plastic material or a metal material; when the plate body 231 is constructed of a plastic material, the plate body 231 is heat-fused and pressed with the structural plate; when the plate body 231 is constructed of a metal material, the plate body 231 is brazed with the structural plate.

[0114] The structural plate can be made of stamped aluminum plate or steel plate, and the heat exchanger 700 is welded to the uppermost structural plate (e.g., brazing). A plate body 231 is set between adjacent structural plates. If the plate body 231 is made of plastic material, it is assembled by hot melt pressing. If the plate body 231 is made of metal material, it is connected by brazing. This makes the connection between the plate body 231 and the structural plate more stable and the overall structural strength of the support plate 20 higher.

[0115] The heat exchanger 700 can be constructed as a heat exchange tube structure instead of a plate structure, eliminating the need for a corresponding double-layer stamped plate heat exchanger. This reduces the material usage of the heat exchanger 700, thereby lowering material costs and reducing process complexity. It also reduces the weight and load of the support plate 20, further improving the profile of the support plate 20 and the flatness of its bottom surface.

[0116] When the plate body 231 is constructed of plastic material, adhesive film layers are provided on both sides of the plate body 231.

[0117] The adhesive film layer can be constructed as a PP (polypropylene polymer) film, which is a thin sheet material that can be placed on both sides of the buffer plate 23 for hot-pressing integration between the buffer plate 23 and the structural plate, thereby improving the connection stability and reliability.

[0118] As shown in Figures 8 and 9, according to some embodiments of this application, the structural plate includes: a first structural plate 21 to an Nth structural plate 22 arranged sequentially in the arrangement direction of the frame 10 and the support plate 20, where N ≥ 2, and at least the first structural plate 21 and the Nth structural plate 22 are connected to the frame 10.

[0119] In some embodiments, the structural plate includes a first structural plate 21 and a second structural plate, with a buffer plate 23 disposed between the first structural plate 21 and the second structural plate, and a heating element disposed on the lower surface of the first structural plate 21; in other embodiments, the structural plate may include a first structural plate 21, a second structural plate and a third structural plate, with buffer plates 23 disposed between the first structural plate 21 and the second structural plate and between the second structural plate and the third structural plate, and a heating element disposed on the lower surface of the first structural plate 21.

[0120] By setting up multiple structural plates and connecting at least the first structural plate 21 and the Nth structural plate 22 to the frame 10, not only can the structural strength and rigidity of the support plate 20 be further improved, but the connection stability and reliability between the support plate 20 and the frame 10 can also be improved.

[0121] Referring to Figures 2, 8 and 9, according to some embodiments of this application, a connecting flange 11 is provided on the side of the frame 10 facing the support plate 20, and the width dimension of the plate body 231 is smaller than the width dimension of the structural plate to define the slot, and the connecting flange 11 extends into the slot; or the connecting flange 11 overlaps the first structural plate 21.

[0122] In some embodiments, a slot is defined between adjacent structural plates, and the connecting flange 11 can be inserted into the slot and connected to the structural plate within the slot, or the connecting flange 11 can directly overlap the upper surface of the structural plate and be connected to the structural plate.

[0123] It can realize the connection between the structural plate and the frame 10, and through the setting of the connecting flange 11, the frame 10 and the support plate 20 have at least a partial overlap to achieve connection and fixation. It can also improve the connection stability and reliability between the structural plate and the frame 10. At the same time, based on the overlap relationship or the plug relationship, only one or two sealing interfaces need to be formed. Compared with the existing technology, the number of sealing interfaces can be reduced, the sealing cost is lower, and the sealing effect is better.

[0124] According to some embodiments of this application, the minimum overlap dimension between the structural plate and the connecting flange 11 in the width and length directions is 6 mm.

[0125] The overlap dimension of the two sides of the structural plate and the connecting flange 11 in the width direction is not less than 6mm, and the overlap dimension of the two sides of the structural plate and the connecting flange 11 in the length direction is also not less than 6mm, so that the area of ​​the connection area between the connecting flange 11 and the structural plate is larger, which improves the connection strength, reduces the welding difficulty, and increases the processing efficiency.

[0126] According to some embodiments of this application, the width of the first structural plate 21 is smaller than the width of the Nth structural plate 22, and the first structural plate 21 is connected to the connecting flange 11, while the Nth structural plate 22 is connected to the end face of the frame 10; or the width of the first structural plate 21 is equal to the width of the Nth structural plate 22, and both the first structural plate 21 and the Nth structural plate 22 are connected to the connecting flange 11.

[0127] As shown in Figure 9, in an embodiment where the width of the first structural plate 21 is smaller than the width of the Nth structural plate 22, and the first structural plate 21 is connected to the connecting flange 11, and the Nth structural plate 22 is connected to the end face of the frame 10, the first structural plate 21 and the connecting flange 11 are connected by an FSW process, and the Nth structural plate 22 and the end face of the frame 10 are connected by an FDS process; as shown in Figure 8, in an embodiment where the width of the first structural plate 21 is equal to the width of the Nth structural plate 22, and both the first structural plate 21 and the Nth structural plate 22 are connected to the connecting flange 11, the first structural plate 21 and the connecting flange 11, and the Nth structural plate 22 and the connecting flange 11 are both connected by an FSW process.

[0128] FSW refers to friction stir welding, and FDW refers to hot melt self-tapping welding. In the embodiment where both the first structural plate 21 and the Nth structural plate 22 are connected by friction stir welding, two sealing interfaces are formed between the first structural plate 21 and the connecting flange 11, and between the Nth structural plate 22 and the connecting flange 11. In the embodiment where the Nth structural plate 22 is connected by hot melt self-tapping welding, three sealing interfaces are formed between the first structural plate 21 and the connecting flange 11, between the Nth structural plate 22 and the end face, and between the self-tapping screw and the frame. The number of sealing interfaces is lower than that of the prior art, which can reduce the number of sealing interfaces and reduce sealing costs. Moreover, they all have high connection stability and reliability, which can improve the structural strength and stability of the housing 100.

[0129] In some embodiments, the width of the Nth structural plate 22 is greater than the width of the first structural plate 21 by a single-side length of 10mm to 50mm.

[0130] This application provides a battery 300, including the housing 100 in the above embodiments.

[0131] This application provides an electrical device, including: the battery 300 in the above embodiment.

[0132] The housing 100, battery 300, and other components and operations of the electrical device according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0133] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0134] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A case, wherein, include: Border (10); A support plate (20) is disposed on one side of the frame (10) and forms an accommodating space with the frame (10). The support plate (20) includes: a multi-layer structural plate and a buffer plate (23) disposed between adjacent structural plates. At least one structural plate is connected to the frame (10). The buffer plate (23) includes: a plate body (231) and a reinforcing plate (232) disposed in the gap of the plate body (231), the reinforcing plate (232) being used at least to fill the gap of the plate body (231) in the width direction of the support plate (20).

2. The case of claim 1, wherein, The plate body (231) includes a plurality of sub-plates (2311), which are spaced apart at least in the length direction of the support plate (20), and the gap is defined between adjacent sub-plates (2311) to accommodate the reinforcing plate (232).

3. The case of any one of claims 1 or 2, wherein, The plate body (231) has a plurality of groove structures (233), and the groove structures (233) define the gap to accommodate the reinforcing plate (232).

4. The housing according to claim 3, wherein, Each of the groove structures (233) includes a first groove (2331) extending along the length direction of the support plate (20) and a second groove (2332) extending along the width direction of the support plate (20). The first groove (2331) and the second groove (2332) of the same groove structure (233) are connected, and the reinforcing plate (232) is provided in at least the second groove (2332).

5. The housing according to any one of claims 2-4, wherein, The accommodating space is suitable for accommodating battery cells (2011), and a plurality of battery cells (2011) are arranged in a cell row (2012) in the width direction, and the length of the cell row (2012) in the width direction is L1, and the length of the reinforcing plate (232) in the width direction is L2, where L2 > L1.

6. The housing according to claim 5, wherein, In the length direction of the support plate (20), the number of reinforcing plates (232) is less than or equal to five.

7. The housing according to any one of claims 1-6, wherein, In the length direction of the support plate (20), the interval between adjacent reinforcing plates (232) is greater than or equal to 100 mm.

8. The housing according to any one of claims 1-7, wherein, The width of the reinforcing plate (232) is 15mm to 100mm.

9. The housing according to any one of claims 1-8, wherein, The plurality of reinforcing plates (232) include a first reinforcing plate disposed relative to the length centerline of the support plate (20) and a second reinforcing plate disposed relative to the length centerline, wherein the width dimension of the first reinforcing plate is greater than the width dimension of the second reinforcing plate.

10. The housing according to any one of claims 1-9, wherein, The plate body (231) has a porous structure.

11. The housing according to claim 10, wherein, The holes on the plate body (231) extend in the opposite direction of the adjacent structural plates.

12. The housing according to claim 10 or 11, wherein, The plate body (231) is constructed of plastic material or metal material; when the plate body (231) is constructed of plastic material, the plate body (231) is heat-fused to the structural plate; when the plate body (231) is constructed of metal material, the plate body (231) is brazed to the structural plate.

13. The housing according to claim 12, wherein, When the plate body (231) is constructed of plastic material, the buffer plate (23) has adhesive film layers on both sides.

14. The housing according to any one of claims 1-13, wherein, The structural plate includes a first structural plate (21) to an Nth structural plate (22) arranged sequentially in the arrangement direction of the frame (10) and the support plate (20), where N≥2, and at least the first structural plate (21) and the Nth structural plate (22) are connected to the frame (10).

15. The housing according to claim 14, wherein, The frame (10) is provided with a connecting flange (11) on the side facing the support plate (20). The width of the buffer plate (23) is smaller than the width of the structural plate to define the slot. The connecting flange (11) extends into the slot; or the connecting flange (11) overlaps the first structural plate (21).

16. The housing according to claim 15, wherein, The minimum overlap dimension between the structural plate and the connecting flange (11) in the width and length directions is 6 mm.

17. The housing according to claim 15 or 16, wherein, The width of the first structural plate (21) is smaller than the width of the Nth structural plate (22), and the first structural plate (21) is connected to the connecting flange (11), while the Nth structural plate (22) is connected to the end face of the frame (10); or, The width of the first structural plate (21) is equal to the width of the Nth structural plate (22), and both the first structural plate (21) and the Nth structural plate (22) are connected to the connecting flange (11).

18. A battery, wherein, include: The housing as described in any one of claims 1-17.

19. An electrical appliance, wherein, include: The battery of claim 18.

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