Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and electric equipment.The battery device comprises a battery single body assembly and a box, and the battery single body assembly comprises a plurality of battery single bodies arranged in a stacked mode; comprising a bottom plate, the bottom plate is of a single-layer flat plate structure, a plurality of through holes are formed in the bottom plate, battery monomers are arranged on the bottom plate, and pressure relief openings of the battery monomers correspond to the through holes; a reinforcing structure is arranged on one side, deviating from each battery monomer, of the bottom plate. According to the battery device provided by the embodiment of the invention, the bottom plate of the box body is the bottom plate, compared with a double-layer plate type bottom plate with a cavity, the thickness of the bottom plate can be thinner, so that the bottom space of the box body occupied by the bottom plate is reduced, in addition, due to the adoption of the design of the single-layer plate, the forming of the through hole can be completed through one-time pressurizing forming, the working procedures are fewer, and the production efficiency is improved. And the forming process is simpler, and the manufacturing cost is lower. In addition, a reinforcing structure is arranged on the bottom plate and used for improving the side collision prevention capacity of the whole box body.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular provides a battery device and an electrical device. Background Art

[0002] Battery devices are widely used in vehicles to provide electric propulsion. To meet the high power requirements of vehicles, batteries are often used as a power source.

[0003] In the related art, the battery device includes a box body and a battery cell assembly accommodated in the box body. The box body includes a bottom plate and a frame surrounded by the bottom plate. The battery cell assembly is placed on the bottom plate, and the pressure relief port of each battery cell faces the bottom plate. Therefore, an exhaust port corresponding to the pressure relief port is opened on the bottom plate.

[0004] However, the current bottom plate adopts a double-layer plate setting, which is relatively thick and has a cavity in the middle of the bottom plate. Therefore, exhaust ports need to be opened on both end faces of the double-layer plate to achieve the purpose of pressure relief, which also requires occupying more bottom space of the box. In addition, the side collision protection capability of the double-layer plate bottom plate is relatively low. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a battery device and an electrical device, aiming to solve the problem that the bottom plate of the box occupies more bottom space of the box and the side collision protection capability is relatively low.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0007] In a first aspect, an embodiment of the present application provides a battery device, comprising:

[0008] a battery cell assembly, the battery cell assembly comprising a plurality of battery cells arranged in a stacked manner; and

[0009] A box body, the box body including a bottom plate, the bottom plate being a single-layer flat plate structure, the bottom plate being provided with a plurality of through holes, each of the battery cells being placed on the bottom plate, and the pressure relief port of each of the battery cells corresponding to the through holes, the bottom plate including at least two sub-plates, each of the sub-plates being spliced ​​to form the bottom plate;

[0010] Wherein, a reinforcement structure is provided on a side of the bottom plate facing away from each battery cell.

[0011] Beneficial effects of the embodiments of the present application: The bottom plate of the battery device provided in the embodiments of the present application is a single-layer flat plate structure. Compared to a double-layer plate bottom plate with a cavity, the bottom plate can be made thinner, thereby reducing the bottom plate's encroachment on the bottom space of the box. This provides more space for the battery cell assembly while maintaining the same exhaust space. Furthermore, due to the single-layer plate design, the through-holes can be formed in a single press molding process, which reduces the number of steps, simplifies the molding process, and reduces manufacturing costs. Furthermore, a reinforcement structure is provided on the bottom plate to enhance the overall side impact resistance of the box.

[0012] In some embodiments, the reinforcement structure includes a first rib structure extending along the width direction of the bottom plate.

[0013] By adopting the above technical solution, the first rib structure extending along the width direction of the bottom plate is utilized to improve the overall side impact resistance of the box.

[0014] In some embodiments, there are multiple first rib structures, and the first rib structures are arranged at intervals along the arrangement direction of the battery cells.

[0015] By adopting the above technical solution and providing a plurality of first rib structures, the side impact protection capability of the entire bottom plate is further improved.

[0016] In some embodiments, at least a portion of the first rib structure extends continuously in the width direction of the bottom plate.

[0017] By adopting the above technical solution, at least a portion of the first rib structure is continuously extended to enhance the structural strength of the first rib structure in the width direction of the bottom plate.

[0018] In some embodiments, at least a portion of the first rib structure extends discontinuously in the width direction of the bottom plate.

[0019] By adopting the above technical solution, at least part of the first rib structure is extended discontinuously, which can simplify the difficulty of forming the first rib structure.

[0020] In some embodiments, the first rib structure includes a first protrusion connected to the bottom plate, and one end of the first protrusion protrudes outward in a direction away from the bottom plate.

[0021] By adopting the above technical solution, the cross-sectional shape of the first rib structure is in a straight line shape, the overall structure is simple and meets the requirement of improving the overall side impact protection capability of the box.

[0022] In some embodiments, the first rib structure includes a second protrusion connected to an end of the first protrusion away from the bottom plate, and a width of the first protrusion is smaller than a width of the second protrusion.

[0023] By adopting the above-mentioned technical solution, the cross-sectional shape of the first rib structure is T-shaped, its structural strength is higher, and its bending resistance is greatly improved, and it can adapt to higher-impact side collision scenarios.

[0024] In some embodiments, the interior of the first rib structure is hollow, and the first rib structure is through-connected along an extension direction of the first rib structure.

[0025] By adopting the above technical solution, the first rib structure has better anti-bending performance and can adapt to higher-impact side collision scenarios.

[0026] In some embodiments, the reinforcement structure further includes a second rib structure connected to the first rib structure, and an extension direction of the second rib structure is arranged at an angle to an extension direction of the first rib structure.

[0027] By adopting the above technical solution, the second rib structure is connected to the first rib structure and is arranged at an angle to further enhance the side impact protection capability of the bottom plate in multiple directions.

[0028] In some embodiments, the reinforcement structure is integrally extruded with the base plate.

[0029] By adopting the above technical solution and using an integrated extrusion molding process, the connection stability between the reinforcement structure and the base plate is made higher.

[0030] In some embodiments, the box body includes a bottom guard plate, which is provided on a side of the bottom plate facing away from the battery cell assembly, and an exhaust gap is formed between the bottom guard plate and the bottom plate.

[0031] By adopting the above technical solution, the bottom guard plate is used to protect the bottom plate and the battery cell assembly.

[0032] In some embodiments, the box includes a frame having a protruding portion extending toward the bottom plate, and the bottom plate is connected to the protruding portion.

[0033] By adopting the above technical solution, the frame and the bottom plate are used to enclose a storage space for accommodating the battery monomer assembly, and the protruding portion is connected to the bottom plate to support the battery monomer assembly.

[0034] In some embodiments, the protruding portion forms a step structure at one end thereof facing the bottom plate, the bottom plate is placed at the step structure, and an end surface of the bottom plate is flush with an end surface of the protruding portion.

[0035] By adopting the above technical solution, a step structure is used to form an installation position to ensure that the end face of the bottom plate is flush with the end face of the extension, providing a spatial physical basis for achieving consistent placement height of the battery cell assembly in the box.

[0036] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery device as described above, the battery device being used to provide electrical energy.

[0037] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A schematic diagram of the structure of the electrical equipment provided in the embodiment of the present application;

[0040] Figure 2 A schematic diagram of the structure of a battery device provided in an embodiment of the present application;

[0041] Figure 3 An exploded view of a battery cell provided in an embodiment of the present application;

[0042] Figure 4 A schematic structural diagram of a box body of a battery device provided in an embodiment of the present application;

[0043] Figure 5 A top view of the bottom plate of the box of the battery device provided in an embodiment of the present application;

[0044] Figure 6 A partial cross-sectional view of the bottom plate of the box of the battery device provided in an embodiment of the present application;

[0045] Figure 7 A partial cross-sectional view of the casing of the battery device provided in an embodiment of the present application.

[0046] Among them, the reference numerals in the figures are:

[0047] 1000, vehicle; 200, controller; 300, motor;

[0048] 100, battery assembly; 10, housing; 11, first housing; 12, second housing; 101, bottom plate; 101a, through-hole; 102, frame; 1021, extension; 1022, step structure; 103, bottom guard plate; 103a, exhaust gap; 20, battery cell; 21, end cap; 22, housing; 23, electrode assembly;

[0049] 30. Reinforcement structure; 31. First rib structure; 311. First raised portion; 312. Second raised portion;

[0050] X, the width direction of the base plate; Y, the length direction of the base plate. DETAILED DESCRIPTION

[0051] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0054] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] In the related art, the battery device includes a box body and a battery cell assembly accommodated in the box body. The box body includes a bottom plate and a frame surrounded by the bottom plate. The battery cell assembly is placed on the bottom plate, and the pressure relief port of each battery cell faces the bottom plate. Therefore, an exhaust port corresponding to the pressure relief port is opened on the bottom plate.

[0056] However, the current bottom plate adopts a double-layer plate setting, which is relatively thick and has a cavity in the middle of the bottom plate. Therefore, exhaust ports need to be opened on both end faces of the double-layer plate to achieve the purpose of pressure relief, which also requires occupying more bottom space of the box. In addition, the side collision protection capability of the double-layer plate bottom plate is relatively low.

[0057] In light of this, the present application provides a battery device in which the bottom plate of the housing is a base plate, which is thinner, requires fewer through-hole opening steps, and is less difficult to form. This reduces the space occupied by the bottom of the housing. Furthermore, a reinforcement structure is provided on the base plate to enhance its side impact protection.

[0058] The battery cells disclosed in the embodiments of the present application can be used in electrical devices that use the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. The electrical devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0059] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0060] Please refer to Figure 1 , Figure 1 A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000. For example, the battery device 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0061] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0062] Please refer to Figure 2 , Figure 2 An exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 described in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assemblies may include multiple battery cells 20, which are connected in series, parallel, or in parallel via a busbar.

[0063] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 20 .

[0064] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 with a cable tie.

[0065] In some embodiments, the battery device 100 may be a battery pack, which includes a case 10 and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case 10 .

[0066] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0067] As an example, the battery cell assembly may also be housed in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0068] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 engage to form an enclosed space within the housing 10 for accommodating the battery cell assembly. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0069] As an example, the box body 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly.

[0070] In some embodiments, the box 10 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the box 10 may form at least a portion of the floor of the vehicle 1000, or a portion of the box 10 may form at least a portion of the cross member and longitudinal member of the vehicle 1000.

[0071] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0072] In the embodiment of the present application, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0073] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiment of the present application.

[0074] Please refer to Figure 3 , Figure 3 The following is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery device 100. Figure 3 The battery cell 20 includes an end cap 21, a shell 22, an electrode assembly 23 and other functional components.

[0075] The end cap 21 is a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cap 21 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents deformation of the end cap 21 during compression and collision, providing the battery cell 20 with greater structural strength and improved reliability. The end cap 21 can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the electrode assembly 23 for inputting or outputting electrical energy from the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 21 can be made of a variety of materials, including, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating member may be provided inside the end cap 21 to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be made of plastic, rubber, or the like.

[0076] The housing 22 is a component that cooperates with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can be used to accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and end cap 21 can be separate components. An opening can be provided in the housing 22, and the end cap 21 is placed over the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and housing 22 can be integrated. Specifically, the end cap 21 and housing 22 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 22 needs to be enclosed, the end cap 21 is placed over the housing 22. The housing 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 22 can be determined based on the specific shape and size of the electrode assembly 23. The housing 22 can be made of a variety of materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0077] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be contained in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 23, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0078] Please refer to Figures 4 to 6 The battery device 100 provided in an embodiment of the present application includes a battery cell assembly and a box body 10.

[0079] The housing 10 includes a bottom plate 101, a single-layer flat plate structure with multiple through-holes 101a. Each battery cell 20 is placed on the bottom plate 101, and the pressure relief vents of each battery cell 20 correspond to the through-holes 101a. The battery cell assembly includes multiple battery cells 20 arranged side by side. A reinforcement structure 30 is provided on the side of the bottom plate 101 facing away from the battery cells 20.

[0080] It is understood that the single-layer flat plate structure of the bottom plate 101 is a flat plate structure without a cavity and capable of forming the through hole 101a in a single punching operation. Here, the thickness of the bottom plate 101 is often relatively thin. In some usage scenarios, the thickness of the bottom plate 101 can be within the range of 2mm to 5mm.

[0081] The pressure relief port of the battery cell 20 refers to the location where the pressure relief structure of the battery cell 20 is placed. That is, when each battery cell 20 is placed in the box 10, the location where the pressure relief structure of the battery cell 20 is placed corresponds to each through-hole 101a on the bottom plate 101. Here, the bottom plate 101 should have a length direction and a width direction. The through-holes 101a can be arranged at intervals along the length direction of the bottom plate 101. In addition, multiple groups of through-holes 101a can be provided along the width direction X of the bottom plate 101. That is, there are multiple battery cell assemblies, and each group of battery cell assemblies is arranged side by side along the width direction X of the bottom plate 101. At the same time, the battery cells 20 in the same group of battery cell assemblies are arranged side by side along the length direction Y of the bottom plate 101 to ensure a one-to-one correspondence between each battery cell 20 and each through-hole 101a.

[0082] The reinforcement structure 30 is an auxiliary structure for improving the structural strength of the bottom plate 101 . Here, the structural strength of the bottom plate 101 may be the bending strength, compression strength, deformation strength, etc. of the bottom plate 101 .

[0083] The reinforcement structure 30 may be formed in the form of a rib, a bump, or a combination thereof. Furthermore, the reinforcement structure 30 may be connected to the base plate 101 via integral molding, welding, threaded connections, or other connection methods. Furthermore, the arrangement of the reinforcement structure 30 on the base plate 101 may be adjusted based on actual usage requirements. For example, in the case of a battery device 100 installed in a vehicle, the length of the housing 10 of the battery device 100 is oriented in the vehicle's travel direction, while the width of the housing 10 is perpendicular to the vehicle's travel direction. In this case, the reinforcement structure 30 may be a plurality of ribs formed on the base plate 101, each rib extending along the width of the housing 10 and spaced apart along the length of the housing 10. This enhances the flexural strength of the single-layer structure in the width direction, thereby improving the battery device 100's housing 10's ability to withstand side impacts in the vehicle. Furthermore, the ribs may also extend at an angle to the width of the base plate 101, further enhancing the structural strength of the base plate 101.

[0084] The battery device 100 provided in the embodiment of the present application comprises a bottom plate 101 as the bottom plate of the housing 10. Compared to a double-layer bottom plate with a cavity, bottom plate 101 can be made thinner to reduce its encroachment on the bottom space of housing 10. Furthermore, due to the single-layer design, through-hole 101a can be formed in a single press molding process, requiring fewer steps, simplifying the molding process, and reducing manufacturing costs. Furthermore, a reinforcement structure 30 is provided on bottom plate 101 to enhance the overall side impact resistance of housing 10.

[0085] Please refer to Figures 4 to 6In some embodiments, the reinforcement structure 30 includes a first rib structure 31 extending along the width direction X of the bottom plate 101 .

[0086] It can be understood that the first rib structure 31 is a structural member protruding outward from the surface of the bottom plate 101, and the first rib structure 31 extends along the width direction X of the bottom plate 101. Therefore, the first rib structure 31 can be continuously extended in the width direction X of the bottom plate 101, that is, the first rib structure 31 is a whole in the width direction X of the bottom plate 101; alternatively, the first rib structure 31 can also be discontinuously extended in the width direction X of the bottom plate 101, that is, it is arranged in multiple sections in the width direction X of the bottom plate 101, and each section is a relatively independent individual and remains consistent only in the extension direction.

[0087] Taking the battery device 100 as an example, the length direction of the housing 10 of the battery device 100 is in the vehicle's travel direction, while the width direction of the housing 10 is perpendicular to the vehicle's travel direction. Therefore, the first rib structure 31 extending along the width direction X of the bottom plate 101 can enhance the battery device 100's housing 10's ability to resist frontal side collisions in the vehicle.

[0088] In this way, the first rib structure 31 extending along the width direction X of the bottom plate 101 is utilized to enhance the overall side impact resistance of the box body 10 .

[0089] Of course, in other embodiments, the first rib structure 31 may also be extended in a direction forming an angle with the width direction X of the base plate 101. In particular, when there are multiple first rib structures 31, a portion of the first rib structures 31 may be extended in the width direction X of the base plate 101, and another portion of the first rib structures 31 may be extended in a direction forming an angle with the width direction X of the base plate 101.

[0090] Please refer to Figures 4 to 6 In some embodiments, there are multiple first rib structures 31 , and the first rib structures 31 are arranged at intervals along the arrangement direction of the battery cells 20 .

[0091] It can be understood that in order to further improve the structural strength of the base plate 101, the number of the first rib structures 31 can be set to multiple, and the first rib structures 31 are arranged at intervals along the arrangement direction of the battery cells 20, that is, the first rib structures 31 are arranged at intervals along the length direction Y of the base plate 101.

[0092] In this way, the plurality of first rib structures 31 are provided to further enhance the overall side impact resistance of the bottom plate 101 .

[0093] In some embodiments, at least a portion of the first rib structure 31 extends continuously in the width direction X of the bottom plate 101 .

[0094] It is understood that the first rib structures 31 extending continuously in the width direction X of the bottom plate 101 means that the first rib structures 31 are a single, integral structure. In the width direction X of the bottom plate 101, each first rib structure 31 may extend from one side of the bottom plate 101 to the other side; or from one side of the bottom plate 101 to the middle of the bottom plate 101; or from the middle of the bottom plate 101 to the other side, etc.

[0095] In this way, at least a portion of the first rib structure 31 is continuously extended to enhance the structural strength of the first rib structure 31 in the width direction X of the bottom plate 101 .

[0096] In some embodiments, at least a portion of the first rib structure 31 extends discontinuously in the width direction X of the bottom plate 101 .

[0097] It can be understood that the first rib structure 31 extending discontinuously in the width direction X of the base plate 101 means that the first rib structure 31 is arranged in at least two segments, each of which is relatively independent and consistent only in its direction of extension. In the width direction X of the base plate 101, the first rib structures 31 can be concentrated at two opposite edges of the base plate 101 in the width direction X, or they can be concentrated in the middle of the base plate 101.

[0098] In this way, by discontinuously extending at least a portion of the first rib structure 31 , the difficulty of forming the first rib structure 31 can be simplified.

[0099] Please refer to Figures 4 to 6 In some embodiments, the first rib structure 31 includes a first protrusion 311 connected to the bottom plate 101 , and one end of the first protrusion 311 protrudes outward in a direction away from the bottom plate 101 .

[0100] It can be understood that the first protrusion 311 is a specific structural form of the first rib structure 31, that is, the first protrusion 311 can be formed by protruding relative to the bottom plate 101 along the thickness direction of the bottom plate 101, or it can also be formed by protruding relative to the bottom plate 101 along a direction that forms an angle with the thickness direction of the bottom plate 101.

[0101] The cross-sectional shape of the first protrusion 311 includes but is not limited to a straight line, a circle, a semicircle, a square, and the like.

[0102] In this way, the overall structure of the first rib structure 31 including only the first rib structure 31 is simple and meets the requirement of improving the overall side collision prevention capability of the box body 10 .

[0103] Please refer to Figure 6 In some embodiments, the first rib structure 31 includes a second protrusion 312 connected to an end of the first protrusion 311 away from the bottom plate 101 , and a width of the first protrusion 311 is smaller than a width of the second protrusion 312 .

[0104] It can be understood that in this embodiment, the first rib structure includes two parts, namely, the first protrusion 311 and the second protrusion 312, and the second protrusion 312 and the first protrusion 311 are stacked in the thickness direction of the base plate 101, and the width of the first protrusion 311 is smaller than the width of the second protrusion 312. Then, the cross-sectional shape of the first rib structure is T-shaped, which has higher structural strength and can further improve the bending resistance of the base plate 101.

[0105] For example, the sum of the height of the first protrusion 311 and the height of the second protrusion 312 may be less than or equal to 5 mm, and the width of the second protrusion 312 may be 1 mm to 5 mm.

[0106] In this way, the cross-section of the first rib structure 31 is T-shaped, its structural strength is higher, and its bending resistance is greatly improved, and it can adapt to higher-impact side collision scenarios.

[0107] In some embodiments, the interior of the first rib structure 31 is hollow, and the first rib structure 31 is through-connected along the extension direction.

[0108] It can be understood that the hollow first rib structure 31 means that there is a cavity inside the first rib structure 31 and the first rib structure 31 is through-set in the extension direction, that is, a continuous channel structure is formed inside the first rib structure 31.

[0109] In terms of mechanical properties, the first rib structure 31 has better anti-bending performance, so it can adapt to higher-impact side collision scenarios.

[0110] In some embodiments, the reinforcement structure 30 further includes a second rib structure connected to the first rib structure 31 , and an extension direction of the second rib structure forms an angle with an extension direction of the first rib structure 31 .

[0111] It can be understood that the second rib structure is a reinforcing rib structure independent of the first rib structure 31 , and the extension direction of the second rib structure is the width direction X of the non-bottom plate 101 , that is, the second rib structure can be set in the width direction X of the non-bottom plate 101 .

[0112] Here, the specific structural form, connection method with the bottom plate 101 , and quantity of the second rib structure may refer to the first rib structure 31 .

[0113] In this way, the second rib structure is connected to the first rib structure 31 and is arranged at an angle to further enhance the side impact resistance of the bottom plate in multiple directions.

[0114] In some embodiments, the reinforcement structure 30 and the base plate 101 are integrally extruded.

[0115] As can be understood, the reinforcement structure 30 protrudes from the base plate 101 and can therefore be manufactured using integral extrusion. Integral extrusion (also known as "integral extrusion") is a process in which a heated, molten material (such as plastic, metal, rubber, etc.) is continuously extruded through a specific die using an extruder to directly form the desired cross-sectional shape. Its core feature is "one-shot molding," eliminating the need for subsequent splicing or assembly. It is suitable for producing continuous profiles in the form of long strips, tubes, or complex cross-sections.

[0116] That is, the reinforcing structure 30 formed by the integral extrusion molding process is more stably combined with the bottom plate 101 and has a higher structural strength.

[0117] For example, each first rib structure 31 in the reinforcement structure 30 can be manufactured together with the bottom plate 101 using an integrated extrusion molding process, and the extrusion direction of each first rib structure 31 can also be the same as the side impact direction of the bottom plate 101 in the vehicle to enhance the side frontal collision capability of the bottom plate 101.

[0118] In this way, the integral extrusion molding process makes the connection between the reinforcement structure 30 and the bottom plate 101 more stable.

[0119] Please refer to Figure 5 In some embodiments, the base plate 101 includes at least two sub-plates, and the sub-plates are spliced ​​to form the base plate 101.

[0120] It is understandable that when the entire bottom plate 101 is too large to be formed in one go, the entire bottom plate 101 can be manufactured by dividing the entire plate into multiple sub-plates, which are then spliced ​​together.

[0121] For example, the bottom plate 101 may be divided in the length direction to form at least two sub-plates, and each sub-plate is spliced ​​and connected by welding.

[0122] In this way, the difficulty of forming the entire bottom plate 101 can be reduced, which is particularly suitable for scenarios where the bottom plate 101 is relatively large.

[0123] Please refer to Figure 7 In some embodiments, the box body 10 includes a bottom guard plate 103 , which is disposed on a side of the bottom plate 101 away from the battery cell assembly, and an exhaust gap 103 a is formed between the bottom guard plate 103 and the bottom plate 101 .

[0124] Understandably, the bottom guard plate 103 is the outermost plate at the bottom of the box 10, directly protecting the battery cell assemblies. The venting gap 103a between the bottom guard plate 103 and the bottom plate 101 is used to relieve pressure from the battery cell assemblies. Therefore, the size of the venting gap 103a should be relatively fixed. Therefore, when the bottom plate 101 is a single-layer flat plate, the overall thickness of the bottom plate 101 is thinner, and the space occupied by the bottom of the box 10 is smaller, thereby providing more space for the battery cell assemblies and providing a basis for improving the energy density of the battery cell assemblies.

[0125] In this way, the bottom guard plate 103 is used to protect the bottom plate 101 and the battery cell assembly.

[0126] Please refer to Figure 7 In some embodiments, the box body 10 includes a frame body 102 , the frame body 102 has a protruding portion 1021 extending toward the bottom plate 101 , and the bottom plate 101 is connected to the protruding portion 1021 .

[0127] It can be understood that the frame 102 is the circumferential structure of the box body 10, which is used to enclose the bottom plate 101 and the battery cell assembly. The extension portion 1021 is the portion of the frame 102 that extends toward the storage space of the box body 10. It can be understood that the frame 102 should have an enclosing portion that encloses the battery cell assembly and an extension portion 1021 that extends toward the bottom plate 101. The extension portion 1021 can extend toward the bottom of the battery cell assembly. That is, there is interference between the two in the height direction of the battery cell assembly, so that a certain support force can also be provided to the battery cell assembly.

[0128] Furthermore, the connection methods between the bottom plate 101 and the extension portion 1021 include but are not limited to welding, plugging, riveting, and threaded connection.

[0129] For example, the extending portion 1021 of the frame body 102 extends in a horizontal direction, that is, the extending portion 1021 is parallel or approximately parallel to the horizontal direction.

[0130] In this way, the frame 102 and the bottom plate 101 are used to enclose a space for accommodating the battery cell assembly, and the extension portion 1021 is connected to the bottom plate 101 to improve the connection convenience between the bottom plate 101 and the frame 102 and to provide support for the battery cell assembly.

[0131] Please refer to Figure 7 In some embodiments, a step structure 1022 is formed at one end of the protruding portion 1021 toward the bottom plate 101 , the bottom plate 101 is placed on the step structure 1022 , and an end surface of the bottom plate 101 is flush with an end surface of the protruding portion 1021 .

[0132] It can be understood that the step structure 1022 is a structure that creates a height difference in the end face of the extension 1021, that is, the extension 1021 with the step structure 1022 should have two end faces, one of which is used to support the battery cell assembly, and the other end face is used to place the bottom plate 101. Therefore, the sum of the thicknesses of the bottom plate 101 and the step structure 1022 needs to be adjusted so that the end face of the bottom plate 101 is flush with the end face of the extension 1021.

[0133] In this way, the step structure 1022 is used to form a mounting position to ensure that the end surface of the bottom plate 101 is flush with the end surface of the extension 1021 , providing a spatial physical basis for achieving a uniform placement height of the battery cell assembly in the box 10 .

[0134] Please refer to Figures 4 to 7 In a specific embodiment, the battery device 100 provided herein includes a battery cell assembly and a housing 10. The housing 10 includes a bottom plate 101, a frame 102, and a bottom guard plate 103. The bottom plate 101 is provided with a plurality of through-holes 101a. Each battery cell 20 is placed on the bottom plate 101, and the pressure relief port of each battery cell 20 corresponds to the through-hole 101a. The battery cell assembly includes a plurality of battery cells 20 arranged side by side. A reinforcement structure 30 is provided on the side of the bottom plate 101 facing away from the battery cells 20.

[0135] The reinforcing structure 30 is extruded integrally with the base plate 101. The base plate 101 includes at least two sub-plates, each of which is spliced ​​together to form the base plate 101. The bottom guard plate 103 is provided on the side of the base plate 101 facing away from the battery cell assembly, and an exhaust gap 103a is formed between the bottom guard plate 103 and the base plate 101. The frame 102 has an extension 1021 toward the base plate 101, and the base plate 101 is connected to the extension 1021. A step structure 1022 is formed at one end of the extension 1021 toward the base plate 101, and the base plate 101 is placed on the step structure 1022, and the end face of the base plate 101 is flush with the end face of the extension 1021.

[0136] The reinforcement structure 30 includes a first rib structure 31 extending along the width direction X of the base plate 101. There are multiple first rib structures 31, and each first rib structure 31 is arranged at intervals along the arrangement direction of the battery cells 20. At least some of the first rib structures 31 extend continuously in the width direction X of the base plate 101. The first rib structure 31 includes a first protrusion 311 and a second protrusion 312 connected to the base plate 101. One end of the first protrusion 311 protrudes outward in a direction away from the base plate 101, and the second protrusion 312 is connected to the end of the first protrusion 311 away from the base plate 101. The width of the first protrusion 311 is smaller than the width of the second protrusion 312.

[0137] The bottom plate of the box 10 is a single-layer flat plate structure. Compared to a double-layer plate bottom plate with a cavity, the thickness of the bottom plate 101 can be made thinner, reducing the bottom plate's encroachment on the bottom space of the box 10. Furthermore, due to the single-layer plate design, the through-hole 101a can be formed in a single press molding process, which reduces the number of steps, simplifies the molding process, and reduces manufacturing costs. The first rib structure 31, with a T-shaped cross-section, has higher structural strength and significantly improved bending resistance, making it suitable for side impact scenarios with higher impact.

[0138] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery device, characterized in that: include: a battery cell assembly, the battery cell assembly comprising a plurality of battery cells arranged in a stacked manner; and A box body, the box body including a bottom plate, the bottom plate being a single-layer flat plate structure, the bottom plate being provided with a plurality of through holes, each of the battery cells being placed on the bottom plate, and the pressure relief port of each of the battery cells corresponding to the through holes, the bottom plate including at least two sub-plates, each of the sub-plates being spliced ​​to form the bottom plate; Wherein, a reinforcement structure is provided on a side of the bottom plate facing away from each battery cell.

2. The battery device according to claim 1, wherein: The reinforcement structure includes a first rib structure extending along the width direction of the bottom plate.

3. The battery device according to claim 2, characterized in that There are multiple first rib structures, and the first rib structures are arranged at intervals along the arrangement direction of the battery cells.

4. The battery device according to claim 3, characterized in that At least a portion of the first rib structure is continuously extended in the width direction of the bottom plate.

5. The battery device according to claim 3, wherein: At least a portion of the first rib structure is discontinuously extended in the width direction of the bottom plate.

6. The battery device according to any one of claims 2 to 5, characterized in that: The first rib structure includes a first protrusion connected to the bottom plate, and one end of the first protrusion protrudes outward in a direction away from the bottom plate.

7. The battery device according to claim 6, characterized in that The first rib structure includes a second convex portion connected to an end of the first convex portion away from the bottom plate, and a width of the first convex portion is smaller than a width of the second convex portion.

8. The battery device according to any one of claims 2 to 5, characterized in that: The interior of the first rib structure is hollow, and the first rib structure is through-connected along the extension direction of the first rib structure.

9. The battery device according to any one of claims 2 to 5, characterized in that: The reinforcement structure further includes a second rib structure connected to the first rib structure, and an extension direction of the second rib structure is arranged at an angle to an extension direction of the first rib structure.

10. The battery device according to any one of claims 1 to 5, characterized in that: The reinforcement structure and the bottom plate are integrally extruded.

11. The battery device according to any one of claims 1 to 5, characterized in that: The box body includes a bottom guard plate, which is arranged on a side of the bottom plate away from the battery monomer assembly, and an exhaust gap is formed between the bottom guard plate and the bottom plate.

12. The battery device according to any one of claims 1 to 5, characterized in that: The box body includes a frame body, the frame body has a protruding portion toward the bottom plate, and the bottom plate is connected to the protruding portion.

13. The battery device according to claim 12, characterized in that The protruding portion forms a step structure at one end thereof facing the bottom plate, the bottom plate is placed at the step structure, and an end surface of the bottom plate is flush with an end surface of the protruding portion.

14. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 13.

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