Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and relates to the technical field of batteries, the battery device comprises a box body and a plurality of battery monomers, the box body comprises a plurality of side edge beams, the plurality of side edge beams are connected to define an energy bin, the plurality of battery monomers are installed in the energy bin, the inner side wall of at least one side edge beam is an arc-shaped wall. According to the battery device disclosed by the embodiment of the invention, the inner side walls of the side edge beams are constructed into the arc-shaped walls, so that when the side edge beams are impacted, the contact area between the side edge beams and the battery monomers is increased, the impact force borne by the side edge beams can be uniformly dispersed, the stress concentration risk of the battery monomers is reduced, the stress of the battery monomers is improved, and the service life of the battery monomers is prolonged. The probability that the single batteries are damaged by extrusion is reduced, and the reliability of the battery device can be improved.

Description

Technical Field

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

[0002] In the related art, when a vehicle collides, the battery device needs to be able to resist the impact force from the vehicle, thereby reducing the probability of fire and explosion of the battery device and improving the reliability of the passenger compartment. The box of the existing battery device has a side beam, and the inner wall of the side beam of the battery device is generally constructed as a flat plate structure. When the vehicle is hit, the side beam is easily deformed and squeezes the battery cells in the battery device, resulting in concentrated force on the battery cells, affecting the reliability of the battery device. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a battery device, which is conducive to increasing the contact area between the side beam and the battery cell when the side beam is hit, so that the impact force on the side beam can be evenly dispersed, reducing the risk of stress concentration on the battery cell, improving the force on the battery cell, and helping to reduce the probability of the battery cell being squeezed and damaged, and can improve the reliability of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, including a box body and a plurality of battery cells, wherein the box body includes a plurality of side beams, the plurality of side beams are connected to enclose an energy bin, and the plurality of battery cells are installed in the energy bin, wherein the inner side wall of at least one side beam is configured as an arc-shaped wall.

[0005] In the above technical solution, by constructing the inner wall of the side beam as an arc-shaped wall, when the side beam is impacted, it is beneficial to increase the contact area between the side beam and the battery cell, and can evenly disperse the impact force on the side beam, reduce the risk of stress concentration on the battery cell, improve the force on the battery cell, and help reduce the probability of the battery cell being squeezed and damaged, thereby improving the reliability of the battery device.

[0006] In some embodiments, the curved wall protrudes into the energy bin.

[0007] In the above technical solution, when the side beam is impacted, the arc-shaped wall protruding into the energy bin contacts the battery cell, which can evenly disperse the impact force on the side beam, evenly stress the battery cell, reduce the risk of stress concentration on the battery cell, improve the stress on the battery cell, and help reduce the probability of deformation of the battery cell.

[0008] In some embodiments, from a lower direction to an upper direction of the battery device, the arc-shaped wall extends toward an outer side of the corresponding side beam.

[0009] In the above technical solution, by setting an arc-shaped wall extending toward the outer side of the corresponding side beam, the stability and reliability of the side beam can be improved, the contact area between the side beam and the battery cell can be further increased, the impact force on the side beam can be better dispersed evenly, the risk of stress concentration on the battery cell can be further reduced, and the damage to the battery cell can be further reduced.

[0010] In some embodiments, at least one side beam has a reinforcement member fixed therein.

[0011] In the above technical solution, by setting reinforcements, the structural strength of the side beams can be improved, the stability of the side beams can be improved, and the impact resistance of the side beams can be further improved, thereby further reducing the probability of battery cells being damaged, improving the reliability of battery cells, and improving the reliability of the battery device.

[0012] In some embodiments, the reinforcement members are arranged along the length direction of the corresponding side beams.

[0013] In the above technical solution, the reinforcement can support the side beam. By arranging one or more reinforcements in the side beam along the length direction of the corresponding side beam, the impact resistance of the side beam can be comprehensively improved along the length direction of the corresponding side beam.

[0014] In some embodiments, the reinforcement member is configured as a tubular structure.

[0015] In the above technical solution, by constructing the reinforcement as a tubular structure, the structural strength of the side beam can be improved while meeting the lightweight design requirements.

[0016] In some embodiments, the box body further includes: a bottom support structure, a plurality of side beams arranged around the bottom support structure along the circumference of the bottom support structure, the plurality of side beams are fixedly connected to the bottom support structure, and the bottom support structure supports a plurality of battery cells.

[0017] In the above technical solution, the bottom support structure can form an energy bin together with multiple side beams. The bottom support structure can support multiple battery cells. When the battery device is hit by the bottom, the bottom support structure can protect the battery cells and reduce the risk of the battery cells being squeezed and damaged. The bottom support structure can also support the side beams, which is beneficial to reduce the probability of the side beams tipping over when hit from the side.

[0018] In some embodiments, a portion of the structure of at least one side beam is located above the bottom support structure.

[0019] In the above technical solution, by arranging a partial structure of at least one side beam above the bottom supporting structure, the coordinated assembly of the side beam and the bottom supporting structure can be facilitated, and the bottom supporting structure can support the side beam, which can improve the impact resistance of the side beam and further reduce the probability of the side beam tipping over when the side beam is hit from the side. The side beam can also limit the bottom supporting structure, which can reduce the probability of the bottom supporting structure deforming toward the energy bin when it is hit from the bottom, and can further improve the reliability of the battery device.

[0020] In some embodiments, the bottom support structure includes: a heat exchange plate, a pad and a bottom guard plate. The heat exchange plate is located on the side of the bottom guard plate facing the energy bin and cooperates with the battery cell for heat exchange. The pad is located between the heat exchange plate and the bottom guard plate, and the pad is fixedly connected to at least one of the heat exchange plate and the bottom guard plate.

[0021] In the above technical solution, by arranging a pad between the heat exchange plate and the bottom guard plate, the structural strength of the bottom support structure can be improved, thereby improving the ability of the bottom support structure to support the side beams, and further reducing the probability of the side beams tipping over when impacted.

[0022] In some embodiments, the backing plate is disposed proximate a peripheral edge of the bottom support structure.

[0023] In the above technical solution, by setting a pad, the structural strength of the bottom supporting structure located below the side beam can be improved, the ability of the bottom supporting structure to support the corresponding side beam can be improved, and the corresponding side beam can be prevented from tipping over when impacted, which is beneficial to improving the stability and reliability of the side beam.

[0024] In some embodiments, the backing plate is disposed along a circumferential extension of the bottom support structure.

[0025] In the above technical solution, by arranging a pad extending along the circumference of the bottom support structure, the effect of supporting multiple side beams along the circumference of the bottom support structure can be achieved. When the battery device is hit in any direction, the bottom support structure can support the corresponding side beams, thereby reducing the probability of the corresponding side beams tipping over, which is beneficial to improving the impact resistance of the corresponding side beams.

[0026] In some embodiments, the box body further includes: a middle beam, the middle beam is located in the energy bin, and both ends of the middle beam are respectively fixedly connected to the opposite side beams.

[0027] In the above technical solution, the middle beam can play a role in supporting the side beams located at both ends along the extension direction of the middle beam, and can improve the ability of the corresponding side beams to withstand impact.

[0028] In some embodiments, the middle beam includes: a middle beam body and two fixed blocks, the middle beam body is located between the two fixed blocks and fixedly connected to the two fixed blocks, and a connecting plate is formed on the side of each fixed block away from the middle beam body, and the connecting plate is fixedly connected to the corresponding side beam.

[0029] In the above technical solution, the connecting plate can increase the contact area between the central beam and the corresponding side beam, improve the connection strength between the central beam and the corresponding side beam, reduce stress concentration, thereby improving the ability of the central beam to support the corresponding side beam, which is beneficial to reduce the deformation of the side beam when it is impacted, thereby playing a role in protecting the battery cell.

[0030] In some embodiments, plug-in slots are formed at both ends of the middle beam body, and each fixing block has a plug-in portion fixedly connected to the connecting plate, and the plug-in portion is inserted into the corresponding plug-in slot and fixedly connected to the middle beam body.

[0031] In the above technical solution, the plug-in part of the fixed block is respectively connected to the middle beam body and the connecting plate, and the plug-in part is inserted into the corresponding plug-in groove, which can improve the connection strength between the middle beam body and the fixed block, thereby improving the integrity of the middle beam, which is beneficial to improving the reliability of the middle beam and improving the ability of the middle beam to support the corresponding side beams.

[0032] In a second aspect, an embodiment of the present application further provides an electrical device, comprising the battery device of the above embodiment.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0036] Figure 2 A top view of a box of a battery device provided in some embodiments of the present application;

[0037] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0038] Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle B area;

[0039] Figure 5 Another angle schematic diagram of the box of the battery device provided in some embodiments of the present application;

[0040] Figure 6 for Figure 5 A partial enlarged schematic diagram of the middle C area;

[0041] Figure 7 for Figure 5 A partial enlarged schematic diagram of the D area in the middle.

[0042] Reference numerals:

[0043] The electric device 100,

[0044] Battery device 110,

[0045] Box body 10, side beam 11, arc wall 111, reinforcement 12, bottom support structure 13, heat exchange plate 131, pad 132, bottom guard plate 133, energy bin 14,

[0046] The middle beam 30, the middle beam body 31, the plug-in slot 311, the first assembly hole 312, the fixing block 32, the connecting plate 321, the plug-in portion 322,

[0047] Controller 120 , electric motor 130 . DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the embodiments of the present application, the same reference numerals represent 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 the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0053] The term “plurality” used in this application refers to two or more (including two).

[0054] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0055] A battery cell may include a housing, an electrode assembly and an electrolyte, wherein the housing is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. A battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode collector, and the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0056] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0057] In recent years, with the continuous development of new energy vehicles, in the field of electric vehicles, battery devices, as the power source of electric vehicles, play an irreplaceable and important role. The battery device can be composed of a box and multiple battery cells contained in the box. Among them, the battery device, as the core component of new energy vehicles, has high requirements for the battery device in resisting external forces.

[0058] In the related art, when a vehicle collides, the battery device needs to be able to resist the impact force from the vehicle, thereby reducing the probability of fire and explosion of the battery device and improving the reliability of the passenger compartment. The box of the existing battery device has a side beam, and the inner wall of the side beam of the battery device is generally constructed as a flat plate structure. When the vehicle is hit, the side beam is easily deformed and squeezes the battery cells in the battery device, resulting in concentrated force on the battery cells, affecting the reliability of the battery device.

[0059] Based on the above considerations, in order to solve the problem of low reliability of the battery device, after in-depth research, a battery device was designed, including a box body and a plurality of battery cells, the box body includes a plurality of side beams, the plurality of side beams are connected and enclosed to form an energy bin, and a plurality of battery cells are installed in the energy bin, wherein the inner side wall of at least one side beam is constructed as an arc-shaped wall.

[0060] In a battery device of this structure, by constructing the inner wall of the side beam as an arc-shaped wall, when the side beam is impacted, the contact area between the side beam and the battery cell is increased, and the impact force on the side beam can be evenly dispersed, thereby reducing the risk of stress concentration on the battery cell, improving the force on the battery cell, and reducing the probability of the battery cell being squeezed and damaged, thereby improving the reliability of the battery device.

[0061] The battery disclosed in the embodiment of the present application can be used in, but is not limited to, electrical devices such as vehicles, ships or aircraft. Electrical devices that can be connected to the battery device disclosed in the present application are all electrical devices that can be used by the battery device disclosed in the embodiment of the present application, which is conducive to improving the application scope of the battery device.

[0062] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electric device 100 in some embodiments of the present application.

[0063] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle may be a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or an extended-range vehicle, etc. A battery device 110 may be provided inside the vehicle, and the battery device 110 may be provided at the bottom, head, or tail of the vehicle. The battery device 110 may be used to power the vehicle, for example, the battery device 110 may be used as an operating power source for the vehicle, and the battery device 110 may be used as a power source for the vehicle. The vehicle may also include a controller 120 and a motor 130, the controller 120 is used to control the battery device 110 to power the motor 130, the battery device 110 is used for the working power demand in the starting, navigation, and driving of the vehicle, and the battery device 110 is connected to the vehicle to realize the application of the battery device 110 in the vehicle.

[0064] Please refer to Figure 2 , Figure 2 The top view of the box 10 of the battery device 110 provided in some embodiments of the present application, the battery device 110 includes the box 10 and a plurality of battery cells, and the battery cells are installed in the box 10. The box 10 provides an assembly space for the battery cells, and the box 10 can be in various shapes, such as: cylinder, cuboid, etc.

[0065] In the battery device 110, multiple battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells is accommodated in the box 10; of course, the battery device 110 can also be a battery device module in which multiple battery cells are first connected in series, in parallel, or in a mixed connection, and multiple battery device modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 110 can also include other structures. For example, the battery device 110 can also include a busbar component for realizing electrical connection between multiple battery cells.

[0066] Each battery cell may be a secondary battery device 110 or a primary battery device 110, or a lithium-sulfur battery device 110, a sodium-ion battery device 110, or a magnesium-ion battery device 110, but is not limited thereto. The battery cell may be cylindrical, flat, rectangular, or in other shapes.

[0067] According to some embodiments of the present application, Figure 2-Figure 4 As shown, the present application provides a battery device 110, which may include a box body 10 and a plurality of battery cells. The box body 10 includes a plurality of side beams 11, and the plurality of side beams 11 are connected to enclose an energy bin 14. The plurality of battery cells are installed in the energy bin 14, wherein the inner side wall of at least one side beam 11 is constructed as an arc-shaped wall 111.

[0068] Among them, multiple battery cells can be arranged in the box body 10. The box body 10 may include a side beam 11, and there may be multiple side beams 11. The multiple side beams 11 can be arranged along the circumference of the box body 10, and any two adjacent side beams 11 can be connected. Multiple side beams 11 can be connected to enclose an energy bin 14, and multiple battery cells can be installed in the energy bin 14. Multiple side beams 11 can surround multiple battery cells. As an example, multiple battery cells can be directly fixedly connected to the box body 10. As another example, multiple battery cells can be bundled into a battery module by cable ties, and the battery module can be fixedly connected to the box body 10.

[0069] The inner wall of the side beam 11 can be constructed as an arc-shaped wall 111, and the surface of the arc-shaped wall 111 facing the energy bin 14 can be constructed as a smooth arc surface. When the side beam 11 is impacted, the side beam 11 collapses and absorbs energy. The inner wall of the side beam 11 constructed as the arc-shaped wall 111 can contact the battery cell in the energy bin 14. The inner wall constructed as the arc-shaped wall 111 can increase the contact area between the side beam 11 and the battery cell, and can evenly disperse the impact force on the side beam 11, reduce the risk of stress concentration on the battery cell, improve the force on the battery cell, and help reduce the probability of the battery cell being squeezed and deformed, and can improve the reliability of the battery device 110. The inner wall of at least one side beam 11 is constructed as an arc-shaped wall 111. The embodiment of the present application is explained by taking the inner walls of multiple side beams 11 as an example. When the battery device 110 is impacted in different directions, the multiple side beams 11 can improve the impact resistance of the side beam 11 along different directions, which is beneficial to improving the reliability of the battery device 110.

[0070] It should be noted that, along the arrangement direction of the side beam 11 and the energy bin 14 , the side of the side beam 11 facing the energy bin 14 is the inner side, and the side of the side beam 11 away from the energy bin 14 is the outer side.

[0071] In the above technical solution, by constructing the inner wall of the side beam 11 as an arc-shaped wall 111, when the side beam 11 is impacted, it is beneficial to increase the contact area between the side beam 11 and the battery cell, and can make the impact force on the side beam 11 evenly dispersed, thereby reducing the risk of stress concentration on the battery cell, improving the force on the battery cell, and helping to reduce the probability of the battery cell being squeezed and damaged, thereby improving the reliability of the battery device 110.

[0072] As an example, when the electric device 100 is a vehicle, the box 10 can be used as a part of the chassis structure of the vehicle, so that the battery device 110 and the vehicle are fixedly connected. For example, part of the structure of the box 10 can become part of the floor of the vehicle, or part of the structure of the box 10 can become part of the crossbeam and longitudinal beam of the vehicle.

[0073] According to some embodiments of the present application, Figure 4 As shown, the arc-shaped wall 111 protrudes into the energy bin 14 .

[0074] Among them, the arc wall 111 has a smooth arc surface without sharp protrusions. The arc surface of the arc wall 111 can protrude toward the energy bin 14. When the side beam 11 is hit, the smooth arc wall 111 first contacts the battery cell. The arc wall 111 can evenly disperse the impact force exerted on the side beam 11, and can evenly distribute the force on the battery cell, thereby reducing the risk of stress concentration on the battery cell and improving the force on the battery cell, thereby reducing damage to the battery cell and helping to reduce the probability of deformation of the battery cell.

[0075] In the above technical solution, when the side beam 11 is impacted, the arc-shaped wall 111 protruding into the energy bin 14 contacts the battery cell, so that the impact force on the side beam 11 can be evenly dispersed, the battery cell can be evenly stressed, the risk of stress concentration on the battery cell can be reduced, the stress on the battery cell can be improved, and the probability of deformation of the battery cell can be reduced.

[0076] According to some embodiments of the present application, Figure 4 As shown, from the bottom direction to the top direction of the battery device 110 , the arc-shaped wall 111 extends toward the outer side of the corresponding side beam 11 .

[0077] The side beam 11 may be formed with an outer side wall, and the outer side wall may be arranged opposite to and spaced from the inner side wall of the side beam 11 along the arrangement direction of the side beam 11 and the energy bin 14. When the battery device 110 is placed in the up-down direction, the outer side wall of the side beam 11 may extend in the height direction of the battery device 110. From the lower direction to the upper direction of the battery device 110, the arcuate wall 111 extends toward the outer side of the corresponding side beam 11, that is, the spacing distance between the arcuate wall 111 and the outer side wall gradually decreases. From the bottom to the top of the battery device 110, the cross-sectional area of ​​the side beam 11 gradually decreases, which can improve the stability and reliability of the side beam 11 and the impact resistance of the side beam 11. When the side beam 11 is impacted, the contact area between the side beam 11 and the battery cell can be increased, and the impact force on the side beam 11 can be better dispersed, further reducing the risk of stress concentration on the battery cell, thereby further reducing the probability of the side beam 11 squeezing the battery cell and deforming the battery cell, which is more conducive to improving the reliability of the battery device 110.

[0078] In the above technical solution, by setting the arc-shaped wall 111 to extend toward the outer side of the corresponding side beam 11, the stability and reliability of the side beam 11 can be improved, the contact area between the side beam 11 and the battery cell can be further increased, the impact force on the side beam 11 can be better dispersed evenly, the risk of stress concentration on the battery cell can be further reduced, and the damage to the battery cell can be further reduced.

[0079] According to some embodiments of the present application, Figure 5 and Figure 7 As shown, at least one side beam 11 has a reinforcement member 12 fixed therein.

[0080] Among them, the reinforcement 12 can be fixed inside the side beam 11, and the reinforcement 12 can be fixedly connected to the side beam 11 by bolt connection, bonding, etc., and the reinforcement 12 can extend along the length direction of the side beam 11. The reinforcement 12 can play a role in supporting the side beam 11, thereby improving the structural strength of the side beam 11, and can further improve the impact resistance of the side beam 11, which is beneficial to reduce the probability of the side beam 11 being crushed when it is hit, reduce the probability of the side beam 11 damaging the battery cell, improve the reliability of the battery cell, and improve the reliability of the battery device 110. At least one side beam 11 is fixedly provided with a reinforcement 12, and the embodiment of the present application is described by taking the reinforcement 12 fixedly provided in multiple side beams 11 as an example, so that the battery device 110 can resist the impact force from different directions, which is beneficial to improve the overall structural strength of the battery device 110.

[0081] In the above technical solution, by setting the reinforcement 12, the structural strength of the side beam 11 can be improved, the stability of the side beam 11 can be improved, and the impact resistance of the side beam 11 can be further improved, thereby further reducing the probability of battery cells being damaged, improving the reliability of battery cells, and improving the reliability of the battery device 110.

[0082] According to some embodiments of the present application, Figure 5 As shown, the reinforcement members 12 are arranged along the length direction of the corresponding side beams 11 .

[0083] Among them, one or more reinforcements 12 may be provided in each side beam 11, and the reinforcements 12 may be arranged along the length direction of the corresponding side beam 11, and the reinforcements 12 may support the side beam 11, so as to achieve the effect of comprehensively improving the impact resistance of the side beam 11 along the length direction of the side beam 11. As an example, when the internal space of the side beam 11 is through, a reinforcement 12 may be provided in the side beam 11, and the reinforcement 12 may extend along the length direction of the corresponding side beam 11, and the length dimension of the reinforcement 12 may be equal to the length dimension of the side beam 11, so as to achieve the effect of the reinforcement 12 supporting the side beam 11 to improve the structural strength of the side beam 11. As another example, when a connecting piece is installed on the side beam 11, and the connecting piece is arranged in the internal space of the side beam 11, there may be multiple reinforcements 12, and multiple reinforcements 12 may be arranged along the length direction of the corresponding side beam 11, so that the reinforcement 12 avoids the connecting piece, so that the reinforcement 12 can improve the structural strength of the side beam 11 without affecting the installation of the side beam 11.

[0084] In the above technical solution, the reinforcement 12 can support the side beam 11. By arranging one or more reinforcements 12 in the side beam 11 along the length direction of the corresponding side beam 11, the impact resistance of the side beam 11 can be comprehensively improved along the length direction of the corresponding side beam 11.

[0085] According to some embodiments of the present application, Figure 7 As shown, the reinforcement member 12 is configured as a tubular structure.

[0086] Among them, the reinforcement 12 can be constructed as a tubular structure with a cross-section of a circular, square or other shape. The reinforcement 12 can be made of a metal material such as aluminum. The cross-sectional shape of the reinforcement 12 can be adapted to the cross-sectional shape of the side beam 11. The reinforcement 12 can support the side beam 11. When the side beam 11 is hit, the reinforcement 12 can support the side beam 11, thereby improving the structural strength of the side beam 11. The reinforcement 12 can collapse and absorb energy, thereby reducing the deformation of the side beam 11, which is more conducive to reducing the probability of the side beam 11 squeezing the battery cell, and further improving the reliability of the battery device 110. In addition, the reinforcement 12 constructed as a tubular structure is light in weight and can meet the requirements of lightweight design.

[0087] In the above technical solution, by constructing the reinforcement 12 as a tubular structure, the structural strength of the side beam 11 can be improved while meeting the lightweight design requirements.

[0088] According to some embodiments of the present application, Figure 3 and Figure 4As shown, the box body 10 may further include: a bottom support structure 13, a plurality of side beams 11 arranged around the bottom support structure 13 along the circumference of the bottom support structure 13, the plurality of side beams 11 are fixedly connected to the bottom support structure 13, and the bottom support structure 13 supports a plurality of battery cells.

[0089] The bottom support structure 13 may be located at the bottom of the box 10, and the bottom support structure 13 may support multiple battery cells. The bottom support structure 13 may protect multiple battery cells. When the battery device 110 is hit from the bottom, the bottom support structure 13 may reduce the risk of the battery cells being squeezed and damaged, and may improve the reliability of the battery cells. Multiple side beams 11 may be arranged around the bottom support structure 13 along the circumference of the bottom support structure 13, and the multiple side beams 11 may be fixedly connected to the bottom support structure 13 by welding, bolting, etc. The multiple side beams 11 and the bottom support structure 13 together construct an energy bin 14. Along the arrangement direction of the side beam 11 and the energy bin 14, part of the structure of the side beam 11 can be arranged opposite to the bottom support structure 13, and the bottom support structure 13 can support the side beam 11 along the arrangement direction of the side beam 11 and the energy bin 14. When the side beam 11 is hit from the side, the bottom support structure 13 can reduce the probability of the side beam 11 tipping toward the energy bin 14, which is beneficial to improving the reliability of the side beam 11.

[0090] In the above technical solution, the bottom support structure 13 can form an energy bin 14 together with multiple side beams 11. The bottom support structure 13 can support multiple battery cells. When the battery device 110 is hit by the bottom, the bottom support structure 13 can protect the battery cells and reduce the risk of the battery cells being squeezed and damaged. The bottom support structure 13 can also support the side beams 11, which is beneficial to reduce the probability of the side beams 11 tipping over when hit from the side.

[0091] According to some embodiments of the present application, Figure 4 As shown, a portion of the structure of at least one side beam 11 is located above the bottom support structure 13 .

[0092] Among them, multiple side beams 11 are fixedly connected to the bottom support structure 13, and along the height direction of the side beam 11, a partial structure of at least one side beam 11 is located above the bottom support structure 13, and the side beam 11 can overlap the bottom support structure 13, and the bottom support structure 13 can be connected to the corresponding side beam 11 along the height direction of the side beam 11, so that the side beam 11 can be easily assembled with the bottom support structure 13. As an example, the bottom support structure 13 can be connected to the corresponding side beam 11 by bolts, and the bolts can be penetrated in the partial structure of the side beam 11 along the height direction of the side beam 11 and assembled with the bottom support structure 13. When the partial structure of the side beam 11 is located above the bottom support structure 13, the bottom support structure 13 can support the corresponding side beam 11, which can improve the impact resistance of the side beam 11 and reduce the probability of the side beam 11 tipping over when it is hit. Along the height direction of the side beam 11, by setting a part of the structure of the side beam 11 above the bottom supporting structure 13, the side beam 11 can limit the bottom supporting structure 13. When the battery device 110 is hit from the bottom, the side beam 11 can limit the deformation of the bottom supporting structure 13 toward the energy bin 14, which is beneficial to reduce the risk of battery cells being squeezed and to improve the reliability of the battery device 110.

[0093] The embodiment of the present application is explained by taking the example that partial structures of multiple side beams 11 are all located above the bottom supporting structure 13. Multiple side beams 11 are overlapped with the bottom supporting structure 13. When the side beams 11 are hit in different directions, the bottom supporting structure 13 can support the corresponding side beams 11, which can further reduce the probability of the corresponding side beams 11 tipping over, and the impact force received by the multiple side beams 11 can be transmitted to the bottom supporting structure 13, which can further disperse the impact force received by the side beams 11 and reduce the impact force transmitted by the side beams 11 to the battery cells.

[0094] In the above technical solution, by arranging a partial structure of at least one side beam 11 to be located above the bottom supporting structure 13, the coordinated assembly of the side beam 11 and the bottom supporting structure 13 can be facilitated, and the bottom supporting structure 13 can support the side beam 11, which can improve the impact resistance of the side beam 11 and further reduce the probability of the side beam 11 tipping over when hit from the side. The side beam 11 can also limit the bottom supporting structure 13, which can reduce the probability of the bottom supporting structure 13 deforming toward the energy bin 14 when hit from the bottom, and further improve the reliability of the battery device 110.

[0095] According to some embodiments of the present application, Figure 4As shown, the bottom support structure 13 may include: a heat exchange plate 131, a pad 132 and a bottom guard plate 133. The heat exchange plate 131 is located on the side of the bottom guard plate 133 facing the energy bin 14 and cooperates with the battery cell for heat exchange. The pad 132 is located between the heat exchange plate 131 and the bottom guard plate 133, and the pad 132 is fixedly connected to at least one of the heat exchange plate 131 and the bottom guard plate 133.

[0096] Among them, the heat exchange plate 131, the pad 132 and the bottom guard plate 133 are stacked, and the heat exchange plate 131, the pad 132 and the bottom guard plate 133 can be arranged in sequence along the height direction of the battery device 110, and the heat exchange plate 131 is located on the side of the bottom guard plate 133 facing the energy bin 14, and the heat exchange plate 131 is located above the bottom guard plate 133. The heat exchange plate 131 can cooperate with the battery monomer for heat exchange, so that the battery device 110 can maintain good performance. As an example, the heat exchange plate 131 can effectively dissipate the heat generated by the battery device 110 during the charging and discharging process. The heat exchange plate 131 can also heat the battery device 110 in a low temperature environment. The heat exchange plate 131 can also make the temperature inside the battery device 110 evenly distributed, reduce the probability of local overheating or overcooling, and thus improve the overall performance and consistency of the battery device 110.

[0097] The bottom guard plate 133 can protect the bottom of the battery device 110. The bottom guard plate 133 can reduce the direct impact of external factors on the battery cells inside the battery device 110, and can improve the reliability and integrity of the battery device 110. The pad 132 is located between the heat exchange plate 131 and the bottom guard plate 133. The pad 132 can be fixedly connected to at least one of the heat exchange plate 131 and the bottom guard plate 133. The pad 132 can be fixedly connected to the heat exchange plate 131 by bonding, bolting, etc. The pad 132 can be fixedly connected to the bottom guard plate 133 by bonding, bolting, etc. The embodiment of the present application takes the fixed connection between the pad 132 and the heat exchange plate 131 as an example. The pad 132 can connect the heat exchange plate 131 and the bottom guard plate 133. The pad 132 can improve the structural strength of the bottom support structure 13, improve the ability of the bottom support structure 13 to support the side beam 11, and further reduce the probability of the side beam 11 tipping over when it is hit.

[0098] In the above technical solution, by setting a pad 132 between the heat exchange plate 131 and the bottom guard plate 133, the structural strength of the bottom support structure 13 can be improved, thereby improving the ability of the bottom support structure 13 to support the side beam 11, and further reducing the probability of the side beam 11 tipping over when hit.

[0099] According to some embodiments of the present application, Figure 4 As shown, the backing plate 132 is disposed near the peripheral edge of the bottom support structure 13 .

[0100] Among them, the pad 132 can be arranged on one side of the bottom supporting structure 13 close to the side beam 11, the pad 132 can be arranged close to the circumferential edge of the bottom supporting structure 13, and part of the structure of the pad 132 can be arranged corresponding to the part of the structure of the side beam 11 located above the bottom supporting structure 13 along the height direction of the battery device 110. The pad 132 can improve the structural strength of the part of the structure of the bottom supporting structure 13 located below the side beam 11, and can further improve the ability of the bottom supporting structure 13 to support the corresponding side beam 11, which is beneficial to improving the stability and reliability of the side beam 11 when it is hit.

[0101] In the above technical solution, by setting the pad 132, the structural strength of the bottom support structure 13 located below the side beam 11 can be improved, the ability of the bottom support structure 13 to support the corresponding side beam 11 can be improved, and the corresponding side beam 11 can be prevented from tipping over when impacted, which is beneficial to improving the stability and reliability of the side beam 11.

[0102] According to some embodiments of the present application, the pad 132 is extended along the circumference of the bottom supporting structure 13 .

[0103] The pad 132 may be arranged to extend along the circumference of the bottom support structure, and the pad 132 may be configured in a ring shape. The pad 132 may improve the structural strength of the bottom support structure 13 along the circumference of the bottom support structure 13. In the embodiment of the present application, the partial structures of the plurality of side beams 11 are all located above the bottom support structure 13 as an example. The pad 132 may be located below the partial structures of the plurality of side beams 11, so that the bottom support structure 13 can better support the plurality of side beams 11.

[0104] In the above technical solution, by arranging a pad 132 extending along the circumference of the bottom support structure 13, the effect of supporting multiple side beams 11 along the circumference of the bottom support structure 13 can be achieved. When the battery device 110 is hit in any direction, the bottom support structure 13 can support the corresponding side beam 11, thereby reducing the probability of the corresponding side beam 11 tipping over, which is beneficial to improving the impact resistance of the corresponding side beam 11.

[0105] According to some embodiments of the present application, Figure 5 As shown, the box body 10 may further include: a middle beam 30 , the middle beam 30 is located in the energy bin 14 , and both ends of the middle beam 30 are fixedly connected to the opposite side beams 11 .

[0106] The middle beam 30 may be located in the energy bin 14. Along the extension direction of the middle beam 30, the two ends of the middle beam 30 may be fixedly connected to the opposite side beams 11 respectively, and the two ends of the middle beam 30 may be fixedly connected to the corresponding side beams 11 respectively by welding, bolt connection, etc., and the middle beam 30 may support the corresponding side beams 11.

[0107] As an example, when the battery device 110 is mounted on the vehicle, the center beam 30 may extend in the width direction of the vehicle, and the center beam 30 may support the corresponding side beam 11 in the width direction of the vehicle. As another example, when the battery device 110 is mounted on the vehicle, the center beam 30 may extend in the length direction of the vehicle, and the center beam 30 may support the corresponding side beam 11 in the length direction of the vehicle.

[0108] In the above technical solution, the middle beam 30 can play a role in supporting the side beams 11 located at both ends along the extension direction of the middle beam 30 , and can improve the ability of the corresponding side beams 11 to withstand impact.

[0109] According to some embodiments of the present application, Figure 5 and Figure 6 As shown, the middle beam 30 includes: a middle beam body 31 and two fixed blocks 32, the middle beam body 31 is located between the two fixed blocks 32 and fixedly connected to the two fixed blocks 32, and a connecting plate 321 is formed on the side of each fixed block 32 away from the middle beam body 31, and the connecting plate 321 is fixedly connected to the corresponding side beam 11.

[0110] Among them, along the extension direction of the middle beam 30, the middle beam body 31 is located between the two fixing blocks 32, and the middle beam body 31 can be connected to the two fixing blocks 32 by bolts. Each fixing block 32 has a side beam 11 adjacent to it, and each fixing block 32 is formed with a connecting plate 321 on the side away from the middle beam body 31, and the connecting plate 321 can be connected to the corresponding side beam 11 by bolts, so that the middle beam 30 is fixed between the two side beams 11.

[0111] In the above technical solution, the connecting plate 321 can increase the contact area between the central beam 30 and the corresponding side beam 11, improve the connection strength between the central beam 30 and the corresponding side beam 11, reduce stress concentration, and thus improve the ability of the central beam 30 to support the corresponding side beam 11, which is beneficial to reduce the deformation of the side beam 11 when it is impacted, thereby playing a role in protecting the battery cell.

[0112] As an example, a plurality of mounting holes may be formed on the connecting plate 321, and the mounting holes may penetrate the connecting plate 321 along the arrangement direction of the connecting plate 321 and the side beam 11. The plurality of mounting holes may be evenly arranged on the connecting plate 321, and each mounting hole has a bolt correspondingly assembled therewith, and the bolt passes through the corresponding mounting hole to be connected to the corresponding side beam 11, thereby improving the connection strength between the connecting plate 321 and the corresponding side beam 11.

[0113] According to some embodiments of the present application, Figure 5-Figure 7As shown, plug-in grooves 311 are formed at both ends of the middle beam body 31 , and each fixing block 32 has a plug-in portion 322 fixedly connected to the connecting plate 321 . The plug-in portion 322 is inserted into the corresponding plug-in groove 311 and fixedly connected to the middle beam body 31 .

[0114] Wherein, along the length direction of the middle beam body 31, both ends of the middle beam body 31 are formed with plug-in grooves 311, and the plug-in grooves 311 can be opened toward the end of the middle beam body 31 along the length direction of the middle beam body 31. Each fixed block 32 has a plug-in portion 322, and the plug-in portion 322 can be fixedly connected with the connecting plate 321, and the plug-in portion 322 can be integrally formed with the connecting plate 321, and the plug-in portion 322 can be welded to the connecting plate 321. The plug-in groove 311 can be assembled with the plug-in portion 322, and the plug-in portion 322 can be inserted into the corresponding plug-in groove 311, and the plug-in portion 322 can be abutted against the inner wall of the corresponding plug-in groove 311, and the plug-in portion 322 can be fixedly connected with the middle beam body 31, so as to achieve the effect of fixed connection between the fixed block 32 and the middle beam body 31.

[0115] As an example, the middle beam body 31 may be formed with a first assembly hole 312, and the first assembly hole 312 may pass through the top wall of the middle beam body 31 along the height direction of the middle beam body 31 (i.e., the height direction of the battery device 110), and the first assembly hole 312 may be connected to the plug-in slot 311, and the plug-in portion 322 may be formed with a screw sleeve, and the screw sleeve has an internal thread. When the plug-in portion 322 is inserted into the corresponding plug-in slot 311, the screw sleeve may be arranged corresponding to the first assembly hole 312 along the height direction of the battery device 110, and the plug-in portion 322 may be connected to the middle beam body 31 by a fixing bolt, and the fixing bolt may be passed through the first assembly hole 312 and the screw sleeve and assembled with the middle beam body 31, thereby realizing the fixed connection between the plug-in portion 322 and the middle beam body 31, and the middle beam body 31 and the fixing block 32 are fixedly connected.

[0116] In the above technical solution, the plug-in portion 322 of the fixed block 32 is respectively connected to the middle beam body 31 and the connecting plate 321, and the plug-in portion 322 is inserted into the corresponding plug-in groove 311, which can improve the connection strength between the middle beam body 31 and the fixed block 32, thereby improving the integrity of the middle beam 30, which is beneficial to improving the reliability of the middle beam 30 and improving the ability of the middle beam 30 to support the corresponding side beam 11.

[0117] According to some embodiments of the present application, the present application further provides an electrical device 100, comprising a battery device 110 of any of the above solutions.

[0118] The power-consuming device 100 may be any of the aforementioned devices using the battery device 110 . The use of the battery device 110 in the above-mentioned embodiments may improve the reliability of the power-consuming device 100 .

[0119] According to some embodiments of the present application, Figure 2-Figure 7 As shown, the present application proposes a battery device 110, which includes a box body 10 and a plurality of battery cells. The box body 10 includes a plurality of side beams 11, and the plurality of side beams 11 are connected to enclose an energy bin 14, and the plurality of battery cells are installed in the energy bin 14. The inner side walls of the plurality of side beams 11 are all constructed as arc-shaped walls 111, and the arc-shaped walls 111 protrude toward the inside of the energy bin 14. From the lower direction to the upper direction of the battery device 110, the arc-shaped walls 111 extend toward the outer side of the corresponding side beam 11. A reinforcement 12 is fixedly provided in each of the plurality of side beams 11, and the reinforcement 12 can be constructed as a square tube, and the reinforcement 12 can extend along the length direction of the corresponding side beam 11. The box body 10 further includes a bottom support structure 13, which includes a heat exchange plate 131, a pad 132 and a bottom guard plate 133. The heat exchange plate 131, the pad 132 and the bottom guard plate 133 are stacked along the height direction of the battery device 110, and the pad 132 and the heat exchange plate 131 are fixedly connected. A plurality of side beams 11 are fixedly connected to the bottom support structure 13, and a plurality of side beams 11 are arranged around the bottom support structure 13 along the circumference of the bottom support structure 13, and a portion of the structure of each side beam 11 is located above the bottom support structure 13, and a portion of the structure of the pad 132 is located below a portion of the structure of the side beam 11, and the pad 132 is arranged to extend along the circumference of the bottom support structure 13, and the pad 132 is configured as a ring structure.

[0120] The battery device 110 also includes a middle beam 30, which is located in the energy bin 14. The two ends of the middle beam 30 are respectively connected to the opposite side beams 11. The middle beam 30 has a middle beam body 31 and fixed blocks 32 located at its two ends. The middle beam body 31 is connected between the two fixed blocks 32. The middle beam body 31 is formed with a plug-in slot 311, and the fixed block 32 has a plug-in portion 322. The plug-in portion 322 can be inserted into the corresponding plug-in slot 311 and screwed with the middle beam body 31. The fixed block 32 also has a connecting plate 321, which can be connected to the corresponding side beam 11 by bolts, thereby achieving the effect of connecting the middle beam 30 and the two opposite side beams 11, so that the middle beam 30 can support the side beams 11 located on both sides thereof.

[0121] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0122] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body and a plurality of battery cells, wherein the box body comprises a plurality of side beams, the plurality of side beams are connected to enclose an energy bin, and the plurality of battery cells are installed in the energy bin, wherein the inner side wall of at least one of the side beams is constructed as an arc-shaped wall.

2. The battery device according to claim 1, characterized in that: The arc-shaped wall protrudes into the energy bin.

3. The battery device according to claim 2, characterized in that: From the lower direction to the upper direction of the battery device, the arc-shaped wall extends toward the outer side of the corresponding side beam.

4. The battery device according to claim 1, characterized in that: A reinforcement member is fixedly disposed inside at least one of the side beams.

5. The battery device according to claim 4, characterized in that: The reinforcement members are arranged along the length direction of the corresponding side beams.

6. The battery device according to claim 4, characterized in that: The reinforcement member is configured as a tubular structure.

7. The battery device according to claim 1, characterized in that: The box body also includes: a bottom support structure, a plurality of side beams are arranged around the bottom support structure along the circumference of the bottom support structure, the plurality of side beams are fixedly connected to the bottom support structure, and the bottom support structure supports a plurality of battery cells.

8. The battery device according to claim 7, characterized in that: A portion of the structure of at least one of the side beams is located above the bottom support structure.

9. The battery device according to claim 7, characterized in that: The bottom supporting structure includes: a heat exchange plate, a pad and a bottom guard plate. The heat exchange plate is located on the side of the bottom guard plate facing the energy bin and cooperates with the battery cell for heat exchange. The pad is located between the heat exchange plate and the bottom guard plate, and the pad is fixedly connected to at least one of the heat exchange plate and the bottom guard plate.

10. The battery device according to claim 9, characterized in that: The pad is disposed adjacent to a circumferential edge of the bottom support structure.

11. The battery device according to claim 10, characterized in that: The pad is extended along the circumference of the bottom supporting structure.

12. The battery device according to any one of claims 1 to 11, characterized in that: The box body further includes: a middle beam, which is located in the energy bin, and two ends of the middle beam are respectively fixedly connected to the opposite side beams.

13. The battery device according to claim 12, characterized in that: The middle beam comprises: a middle beam body and two fixed blocks, wherein the middle beam body is located between the two fixed blocks and is fixedly connected to the two fixed blocks, and a connecting plate is formed on a side of each fixed block away from the middle beam body, and the connecting plate is fixedly connected to the corresponding side beam.

14. The battery device according to claim 13, characterized in that: Insertion grooves are formed at both ends of the middle beam body, and each of the fixing blocks has an inserting portion fixedly connected to the connecting plate, and the inserting portion is inserted into the corresponding inserting groove and fixedly connected to the middle beam body.

15. An electrical device, characterized in that: Comprising a battery device according to any one of claims 1-14.

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