Battery devices and power-consuming devices

Abstract

The present application provides a battery device and an electrical device, the battery device comprising: a battery cell assembly, a tray assembly and a restraining assembly; the battery cell assembly is arranged on the bearing surface of the tray assembly, and the tray assembly also has two fixed beams arranged on the bearing surface and respectively located on opposite sides of the battery cell assembly; the fixed beam has a first hollow area, and the first hollow area is formed with an opening on the side of the fixed beam away from the bearing surface; the restraining assembly is located on the side of the battery cell assembly away from the bearing surface; the opposite ends of the restraining assembly are respectively embedded in the first hollow areas of the two fixed beams, so as to cooperate with the fixed beams to restrain the battery cell assembly on the bearing surface. Through the above arrangement, the first hollow area can be used for the end of the restraining assembly to be embedded to realize the connection between the fixed beam and the restraining assembly, which is conducive to simplifying the structure of the fixed beam, so that the tray assembly can be processed in one piece, so as to improve the structural strength of the tray assembly, thereby enhancing the reliability of the tray assembly.

Description

Technical Field

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

[0002] At present, the common battery structure includes: a battery cell and a tray for placing the battery cell, and the tray may also be provided with an expansion beam for fixing the battery cell, and the battery cell can be fastened to the tray through the expansion beam. However, the existing expansion beam is relatively complex in structure, generally needs to be independently processed and manufactured, and then fixed to the tray by welding, which undoubtedly reduces the connection reliability between the tray and the expansion beam. Utility Model Content

[0003] The present application provides a battery device and an electrical device, aiming to solve the technical problem of insufficient reliability of existing tray assemblies.

[0004] In order to solve the above problems, the present application provides a battery device on the one hand, which includes: a battery cell assembly, a tray assembly and a restraining assembly; the battery cell assembly is arranged on the bearing surface of the tray assembly, and the tray assembly also has two fixed beams arranged on the bearing surface and respectively located on the opposite sides of the battery cell assembly; the fixed beam has a first hollow area, and the first hollow area forms an opening on the side of the fixed beam away from the bearing surface; the restraining assembly is located on the side of the battery cell assembly away from the bearing surface; the opposite ends of the restraining assembly are respectively embedded in the first hollow areas of the two fixed beams, so as to cooperate with the fixed beams to restrain the battery cell assembly on the bearing surface.

[0005] In the above scheme, by providing a first hollow area on the fixed beam, and the first hollow area forms an opening on the side of the fixed beam away from the load-bearing surface, the end of the restraint assembly can be embedded in the first hollow area of ​​the fixed beam from the opening, so as to cooperate with the fixed beam to restrain the battery cell assembly on the load-bearing surface. At the same time, by providing the first hollow area for the end of the restraint assembly to be embedded to achieve the connection between the fixed beam and the restraint assembly, the structural design of the fixed beam can also be simplified, so that the tray assembly can be processed in one piece, so as to improve the structural strength of the tray assembly, thereby enhancing the reliability of the tray assembly.

[0006] In one embodiment, the restraining assembly includes: a restraining member and a connecting member; the restraining member is arranged on the side of the battery cell assembly away from the bearing surface, and the connecting members are provided at opposite ends of the restraining member; the two connecting members are respectively embedded in the first hollow areas of the two fixed beams.

[0007] Thus, the restraining member can be connected to the two fixed beams respectively through the connecting members at the opposite ends, and cooperate with the fixed beams to restrain the battery cell assembly on the bearing surface to improve the connection tightness between the battery cell assembly and the tray assembly, thereby reducing the probability of resonance between the battery cell assembly and the tray assembly.

[0008] In one embodiment, the fixed beam has a plurality of support ribs located in the first hollow area; the plurality of support ribs are arranged in the first hollow area at intervals along the length direction of the fixed beam.

[0009] Therefore, a plurality of supporting ribs can be used to support the fixed beam to improve the structural strength and rigidity of the fixed beam.

[0010] In one embodiment, the connecting member is disposed adjacent to at least one of the supporting ribs.

[0011] Therefore, the supporting ribs can be used to reinforce the local area of ​​the fixed beam corresponding to the connecting piece, so that the fixed beam can better resist the expansion force generated by the battery cell assembly.

[0012] In one embodiment, the cross-section of the connecting member is trapezoidal and has an upper bottom surface and a lower bottom surface that are relatively arranged; the fixed beam has a first wall surface away from the battery monomer assembly and a second wall surface close to the battery monomer assembly in the first hollow area; the upper bottom surface and the lower bottom surface are in contact with the first wall surface and the second wall surface respectively.

[0013] Thus, the upper bottom surface and the lower bottom surface of the connector can contact the first wall surface and the second wall surface of the fixed beam respectively, so that the connector can transfer the expansion force generated by the battery cell assembly to the fixed beam, so as to use the fixed beam to resist the expansion force generated by the battery cell assembly. At the same time, the trapezoidal design of the connector can also reduce the weight and material cost of the connector, and the use of the larger lower bottom surface to contact the second wall surface of the fixed beam close to the battery cell assembly can also reduce the probability of deformation of the fixed beam due to excessive local pressure.

[0014] In one embodiment, the connecting member has a plurality of welds formed by welding with the fixing beam, and the extending direction of the welds is perpendicular to the bearing surface.

[0015] Thus, the weld formed by welding the connecting member and the fixing beam can be formed at the side of the connecting member perpendicular to the bearing surface, so that the process of grinding the weld can be omitted, thereby reducing the production cost of the tray assembly.

[0016] In one embodiment, the binding assembly further includes: two fasteners; the two fasteners are respectively passed through the opposite ends of the binding member and are respectively inserted into the two connecting members to fix the binding member and the connecting member.

[0017] Thus, two fasteners can be used to fasten the two opposite ends of the tie piece and the two connecting pieces together, so that the tie piece can be connected to the fixing beam through the connecting piece to tie the battery cell assembly to the bearing surface. At the same time, by connecting the tie piece and the connecting piece through the fastener, the installation convenience of the tie piece and the connecting piece can also be improved.

[0018] In one embodiment, the tray assembly further includes: a tray integrally die-cast with the fixed beam; the tray has the bearing surface and is jointly enclosed with the two fixed beams to form a limiting space for accommodating the battery cell assembly.

[0019] Therefore, the fixing beam and the tray can be formed simultaneously by integral die casting to improve the reliability of the tray assembly.

[0020] In one embodiment, the fixed beam further has a second hollow area, and the second hollow area forms an opening on a side of the tray away from the bearing surface.

[0021] Therefore, the second hollow area can be used to reduce the weight of the fixed beam.

[0022] In one embodiment, there are multiple battery cell assemblies and multiple restraining assemblies; the multiple battery cell assemblies are arranged in sequence on the bearing surface along the length direction of the fixed beam; a single restraining assembly is arranged on the side of the battery cell assembly away from the bearing surface, and is located on a partial area where two adjacent battery cell assemblies are close to each other.

[0023] Therefore, by arranging the restraining assembly on the partial area of ​​two adjacent battery cell assemblies close to each other, the structural members arranged on the two adjacent battery cell assemblies can be avoided.

[0024] On the other hand, the present application further provides an electrical device, which includes: the above-mentioned battery device.

[0025] Therefore, a battery device with higher reliability can be used to provide electric energy to the electric device, so as to reduce the probability of power failure of the electric device due to a failure of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0027] Figure 1is a schematic diagram of the structure of an electric device provided in an embodiment of the present application;

[0028] Figure 2 yes Figure 1 A schematic diagram of a portion of the structure of the battery device;

[0029] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the central battery device;

[0030] Figure 4 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0031] Figure 5 yes Figure 2 A schematic diagram of a partial cross-sectional structure of the middle battery device along V-V;

[0032] Figure 6 is a top view of a portion of a battery device;

[0033] Figure 7 yes Figure 6 A local enlarged schematic diagram of point B in the middle.

[0034] The reference numerals are as follows:

[0035] Electrical device 1; battery device 10; controller 20; motor 30; battery cell assembly 100; tray assembly 200; bearing surface 201; limiting space 202; fixing beam 210; first hollow area 211; second hollow area 212; supporting rib 213; first wall 214; second wall 215; tray 220; bottom plate 221; side plate 222; restraint assembly 300; restraint member 310; connector 320; upper bottom surface 321; lower bottom surface 322; weld 323; fastener 330. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of the present application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of the present application and should not be regarded as an improper limitation on the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "second direction" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0044] In some solutions, the battery may have a tray for placing battery cells, an expansion beam disposed on the tray, and a pressure strip connecting the expansion beam and the battery cells, so that the pressure strip and the expansion beam are used to fix the battery cells on the tray, and the expansion beam is used to resist the expansion force generated by the battery cells. In order to reduce the risk of failure of the connection between the expansion beam and the pressure strip, most expansion beams are relatively complex in structural design, such as designing additional reinforcement structures or support structures, so that the expansion beam generally needs to be processed and manufactured separately, and then fixed to the tray by welding.

[0045] However, the tray and the expansion beam are connected by welding, which not only easily leads to the risk of connection failure when the expansion force generated by the battery cell is too large, but also the welding quality between the two is easily affected by adverse factors such as empty welding, false welding or false welding, which ultimately reduces the connection reliability of the tray and the expansion beam.

[0046] In order to solve the above technical problems, the present application provides a battery device, by providing a first hollow area on the fixed beam, and the first hollow area forms an opening on the side of the fixed beam away from the bearing surface, so that the end of the restraint assembly can be embedded in the first hollow area of ​​the fixed beam from the opening, so as to cooperate with the fixed beam to restrain the battery cell assembly on the bearing surface. At the same time, by providing the first hollow area for the end of the restraint assembly to be embedded to achieve the connection between the fixed beam and the restraint assembly, the structural design of the fixed beam can also be simplified, so that the tray assembly can be processed in one piece, so as to improve the structural strength of the tray assembly, thereby enhancing the reliability of the tray assembly.

[0047] The battery device involved in the embodiments of the present application can be used in an electrical device that uses the battery device as a power source. The electrical device involved in the embodiments of the present application may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, a vehicle, a ship, a spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like. According to the power source, the vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like. According to the drive mode, the vehicle may be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle.

[0048] The electrical device may include a device body and a battery device as mentioned in the context. The device body is the main frame structure of the electrical device. For example, when the electrical device is a vehicle, the device body is the vehicle body. When the electrical device is a ship, the device body is the ship hull.

[0049] In other embodiments, the battery device involved in the embodiments of the present application can also be used in an energy storage system that uses the battery device as an energy storage element. Among them, the energy storage system can include an energy storage container, an energy storage cabinet, etc.

[0050] See also Figure 1 , Figure 1 It is a schematic diagram of the structure of the electric device 1 provided in an embodiment of the present application.

[0051] like Figure 1 As shown, the electric device 1 provided in the embodiment of the present application may be a vehicle, and a battery device 10 is disposed inside the electric device 1. The battery device 10 may be disposed at the bottom, head, or tail of the electric device 1, and the battery device 10 may be used as an operating power source of the electric device 1 to power the electric device 1. For example, the electric device 1 may also include a controller 20 and a motor 30, and the controller 20 is used to control the battery device 10 to power the motor 30 to meet the working power requirements of the electric device 1 during startup, navigation, and driving. Of course, the battery device 10 may not only be used as an operating power source for the electric device 1, but also as a driving power source for the electric device 1, to replace or partially replace fuel or natural gas to provide driving power for the electric device 1.

[0052] See also Figures 2 to 4 , Figure 2 yes Figure 1 A partial structural diagram of the battery device 10 is shown in FIG. Figure 3 yes Figure 2 The exploded structural diagram of the middle battery device 10 is shown in FIG. Figure 4 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0053] The battery device 10 can be used to provide power to the power-consuming device 1, and the battery device 10 may include: a battery cell assembly 100, a tray assembly 200, and a restraining assembly 300. Figures 2 to 4As shown, the battery cell assembly 100 can be arranged on the bearing surface 201 of the tray assembly 200, and the tray assembly 200 also has two fixed beams 210 arranged on the bearing surface 201 and respectively located on opposite sides of the battery cell assembly 100. The fixed beam 210 has a first hollow area 211, and the first hollow area is formed with an opening on the side of the fixed beam 210 away from the bearing surface 201. The restraint assembly 300 is located on the side of the battery cell assembly 100 away from the bearing surface 201, and the opposite ends of the restraint assembly 300 can be respectively embedded in the first hollow areas 211 of the two fixed beams 210, so as to cooperate with the fixed beams 210 to restrain the battery cell assembly 100 on the bearing surface 201.

[0054] The battery cell assembly 100 may include at least one battery cell, and the battery cell may be used to store or release electrical energy to power the electrical device 1 when needed. The battery cell may be a secondary battery, which refers to a battery cell that can be recharged to activate the active material after the battery cell is discharged and continue to be used. At the same time, the battery cell may include but is not limited to lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0055] When there are multiple battery cells, the multiple battery cells can be electrically connected by at least one of series connection, parallel connection and hybrid connection through a busbar component, and can be connected together by bundling to be placed as a whole on the carrying surface 201 of the tray assembly 200. Of course, the multiple battery cells can also be divided into multiple groups according to a preset number for bundling, and are not limited to being bundled into one group.

[0056] In some embodiments, the connection method of multiple battery cells is not limited to bundling, and multiple battery cells can also be connected in other ways. In some embodiments, multiple battery cells are not limited to being placed on the tray assembly 200 as a whole after being bundled into one, and multiple battery cells can also be placed on the tray assembly 200 independently.

[0057] The tray assembly 200 has a bearing surface 201 on which the battery cell assembly 100 can be placed, and the tray assembly 200 can protect and fix the battery cell assembly 100. The tray assembly 200 can have two fixing beams 210 arranged opposite to and spaced apart on the bearing surface 201, and the battery cell assembly 100 can be located between the two fixing beams 210, so that the two fixing beams 210 can limit the expansion of the battery cell assembly 100 in the first direction Y.

[0058] The fixed beam 210 may have a first hollow area 211, and the first hollow area 211 may form an opening on the side of the fixed beam 210 away from the bearing surface 201, so that the end of the restraint assembly 300 can be embedded in the first hollow area 211 from the opening to achieve the connection between the restraint assembly 300 and the fixed beam 210. In this embodiment, the first direction Y may be a direction in which the two fixed beams 210 approach or move away from each other, and is parallel to the bearing surface 201.

[0059] The restraint assembly 300 may be disposed on the side of the battery cell assembly 100 away from the bearing surface 201, and the opposite ends of the restraint assembly 300 may be respectively embedded in the first hollow areas 211 of the two fixed beams 210, so as to cooperate with the fixed beams 210 to restrain the battery cell assembly 100 on the bearing surface 201, thereby reducing the probability of resonance between the battery cell assembly 100 and the tray assembly 200. At the same time, when the battery cell assembly 100 expands in the second direction Z, the restraint assembly 300 may also transfer the expansion force generated by the battery cell assembly 100 to the fixed beams 210, so as to cooperate with the fixed beams 210 to resist the expansion force of the battery cell assembly 100, thereby limiting the expansion of the battery cell assembly 100 in the second direction Z. In this embodiment, the second direction Z may be perpendicular to the first direction Y and perpendicular to the bearing surface 201.

[0060] In the above scheme, by providing the first hollow area 211 on the fixed beam 210, and the first hollow area 211 forms an opening on the side of the fixed beam 210 away from the bearing surface 201, the end of the restraint assembly 300 can be embedded in the first hollow area 211 of the fixed beam 210 from the opening, so as to cooperate with the fixed beam 210 to restrain the battery cell assembly 100 on the bearing surface 201. At the same time, by providing the first hollow area 211 for the end of the restraint assembly 300 to be embedded, the connection between the fixed beam 210 and the restraint assembly 300 is realized, and the structural design of the fixed beam 210 can also be simplified, so that the tray assembly 200 can be processed in one piece, so as to improve the structural strength of the tray assembly 200, thereby enhancing the reliability of the tray assembly 200.

[0061] like Figures 2 to 3 As shown, there may be multiple battery cell assemblies 100, and there may also be multiple restraint assemblies 300. The multiple battery cell assemblies 100 are sequentially arranged on the bearing surface 201 along the length direction of the fixed beam 210. A single restraint assembly 300 is arranged on the side of the battery cell assembly 100 away from the bearing surface 201, and is located on a partial area where two adjacent battery cell assemblies 100 are close to each other.

[0062] A plurality of battery cell assemblies 100 may be sequentially arranged on the bearing surface 201 along a third direction X, and the third direction X may be the length direction of the fixed beam 210 and is respectively perpendicular to the first direction Y and the second direction Z. The battery cell assembly 100 may be composed of a plurality of battery cells. For example, a plurality of battery cells may be sequentially arranged along the first direction Y to collectively constitute the battery cell assembly 100.

[0063] A plurality of restraint assemblies 300 may be arranged at intervals along the third direction X on the side of the battery cell assembly 100 away from the bearing surface 201, and the number of restraint assemblies 300 may be less than the number of battery cell assemblies 100, so as to simplify the number of structures of the battery device 10. A single restraint assembly 300 may be located on a partial area where two adjacent battery cell assemblies 100 are close to each other, that is, in the gap between two adjacent battery cell assemblies 100, so that the side of the single battery cell assembly 100 away from the bearing surface 201 will not be completely occupied by the restraint assembly 300, so as to avoid structural components arranged on the side of the battery cell assembly 100 away from the bearing surface 201, such as an electrode structure, an insulating structure or an explosion-proof structure.

[0064] In the above solution, multiple battery cell assemblies 100 can be arranged in sequence on the carrying surface 201 along the third direction X, and a single restraining assembly 300 is arranged on the side of the battery cell assembly 100 away from the carrying surface 201, so that the multiple restraining assemblies 300 can jointly restrain the multiple battery cell assemblies 100 on the carrying surface 201. At the same time, by arranging the restraining assembly 300 in the gap between two adjacent battery cell assemblies 100, the structural components arranged on the two adjacent battery cell assemblies 100 can also be avoided.

[0065] like Figures 2 to 4 As shown, the tray assembly 200 may include: a tray 220 integrally die-cast with the fixed beam 210. The tray 220 may have the aforementioned bearing surface 201, and the tray 220 may also be jointly surrounded with the two fixed beams 210 to form a limited space 202 for accommodating the battery cell assembly 100.

[0066] The tray 220 may include: a bottom plate 221 and a side plate 222. The side plate 222 may be connected to the bottom plate 221 and arranged around the circumference of the bottom plate 221, and the bottom plate 221 and the side plate 222 may also be jointly arranged to form an installation space for accommodating various structural parts of the battery device 10. At the same time, one side of the bottom plate 221 located in the installation space may be a bearing surface 201, and two fixed beams 210 may be arranged oppositely and spaced apart on the bearing surface 201, and the opposite ends of the fixed beams 210 in the third direction X may also be connected to the side plate 222, so that the two fixed beams 210 may be jointly arranged with the bottom plate 221 and the side plate 222 to form a limiting space 202, so as to accommodate the battery cell assembly 100 while limiting the expansion of the battery cell assembly 100 by using the side plate 222 and the bottom plate 221.

[0067] Since the structure of the fixed beam 210 is simple, the tray 220 and the fixed beam 210 can be integrally die-casted by a die-casting process, which can not only improve the connection reliability of the tray 220 and the fixed beam 210, but also improve the overall air tightness of the tray assembly 200. Of course, in addition to integral die-casting, the tray 220 and the fixed beam 210 can also be made by other integral molding processes, as long as the tray 220 and the fixed beam 210 can be integrally made, which will not be listed here in this embodiment.

[0068] In the above solution, a tray 220 having a bearing surface 201 and two fixed beams 210 are provided to enclose together to form a limiting space 202 for accommodating the battery cell assembly 100, so that the tray 220 and the two fixed beams 210 can cooperate to limit the battery cell assembly 100 to resist the expansion force generated by the battery cell assembly 100. At the same time, the tray 220 and the fixed beams 210 can be integrally die-casted by a die-casting process, which can not only improve the connection reliability of the tray 220 and the fixed beams 210, but also improve the overall airtightness of the tray assembly 200.

[0069] Please combine Figure 4 See also Figure 5 , Figure 5 yes Figure 2 A schematic diagram of the partial cross-sectional structure of the middle battery device 10 along line V-V.

[0070] like Figure 5 As shown, the fixing beam 210 may further have a second hollow area 212 , and the second hollow area 212 may be formed with an opening on a side of the tray 220 away from the carrying surface 201 .

[0071] The first hollow area 211 and the second hollow area 212 may be formed during the die-casting process of the fixed beam 210. The first hollow area 211 is formed with an opening on the side of the fixed beam 210 away from the bearing surface 201, and the second hollow area 212 is formed with an opening on the side of the bottom plate 221 away from the fixed beam 210, so that the opening of the first hollow area 211 and the opening of the second hollow area 212 may be arranged opposite to each other in the second direction Z. The first hollow area 211 and the second hollow area 212 may be independent, so that the fixed beam 210 is not penetrated by the first hollow area 211 and the second hollow area 212 in the second direction Z, so as to enhance the structural strength of the fixed beam 210. Of course, in some embodiments, the first hollow area 211 and the second hollow area 212 may also be connected, and only the first hollow area 211 is required to be embedded in the end of the restraint assembly 300.

[0072] In the above solution, by providing the second hollow area 212 on the fixed beam 210 , and the second hollow area 212 can also form an opening on the side of the tray 220 away from the bearing surface 201 , the weight of the fixed beam 210 can be further reduced.

[0073] In some embodiments, the design of the second hollow area 212 may also be omitted to enhance the structural strength and rigidity of the fixing beam 210 .

[0074] like Figure 4 As shown, in order to enhance the structural strength and rigidity of the fixed beam 210, the fixed beam 210 may also have a plurality of support ribs 213 located in the first hollow area 211. The plurality of support ribs 213 may be arranged in the first hollow area 211 at intervals along the length direction of the fixed beam 210, that is, the third direction X.

[0075] The support ribs 213 may be a part of the fixed beam 210, and may be located in the first hollow area 211 with the fixed beam 210, and connected to two sides that are arranged opposite to each other in the first direction Y, so that the support ribs 213 can reinforce the fixed beam 210. The arrangement positions of the plurality of support ribs 213 in the first hollow area 211 may be adjusted according to the stress conditions of the fixed beam 210. For example, the stress levels of various regions of the fixed beam 210 may be obtained through simulation tests, and a larger number of support ribs 213 may be arranged in regions with greater stress, and a smaller number of support ribs 213 may be arranged in regions with less stress, so as to reinforce the fixed beam 210 in a targeted manner.

[0076] In the above solution, by arranging a plurality of support ribs 213 at intervals along the third direction X in the first hollow area 211 , the plurality of support ribs 213 can be used to reinforce the fixed beam 210 to improve the structural strength and rigidity of the fixed beam 210 .

[0077] In some embodiments, in addition to reinforcing the fixed beam 210 by providing the support ribs 213, the fixed beam 210 may also be reinforced by other structural members independent of the fixed beam 210. For example, the tray assembly 200 may also have a reinforcing member embedded in the first hollow area 211, such as a rigid structure whose shape matches the first hollow area 211, and the reinforcing member may occupy a part of the first hollow area 211, so as to avoid the end of the restraint assembly 300 while reinforcing the fixed beam 210.

[0078] The opposite ends of the restraining assembly 300 can be respectively embedded in the first hollow areas 211 of the two fixing beams 210, and can cooperate with the fixing beams 210 to restrain the battery cell assembly 100 on the bearing surface 201. Figures 4 to 5 As shown, the restraint assembly 300 may include: a restraint member 310 and a connection member 320. The restraint member 310 is disposed on the side of the battery cell assembly 100 away from the bearing surface 201, and the connection members 320 are disposed at opposite ends of the restraint member 310. The two connection members 320 may be respectively embedded in the first hollow areas 211 of the two fixed beams 210.

[0079] The restraining member 310 may be disposed on a side of the battery cell assembly 100 away from the bearing surface 201, and located on a portion of the area where two adjacent battery cell assemblies 100 are close to each other, that is, at the gap between the two adjacent battery cell assemblies 100, so as to avoid the structural components arranged on the battery cell assemblies 100. Specifically, the extension direction of the gap between the two adjacent battery cell assemblies 100 is parallel to the first direction Y, and the restraining member 310 may be arranged along the gap, and may cover a portion of the area where two adjacent battery cell assemblies 100 are close to each other, so as to avoid the structural components arranged on the two adjacent battery cell assemblies 100.

[0080] The restraining member 310 may be a steel belt, so that the restraining member 310 may have high strength and toughness, so as to cooperate with the fixing beam 210 to restrain the battery cell assembly 100 on the bearing surface 201, and resist the expansion force generated by the battery cell assembly 100 in the second direction Z. The restraining member 310 may be arranged in a strip shape, and the restraining member 310 may be provided with connecting members 320 at both opposite ends in the first direction Y, so as to use the two connecting members 320 to connect with the two fixing beams 210 respectively. Of course, in some embodiments, in addition to the steel belt, the restraining member 310 may also be other structural members with sufficient strength and toughness, and the restraining member 310 only needs to cooperate with the fixing beam 210 to restrain the battery cell assembly 100 on the bearing surface 201.

[0081] The side of the connecting member 320 facing away from the bearing surface 201 can be connected to the end of the restraining member 310, and can be embedded in the first hollow area 211 from the opening formed by the first hollow area 211 to connect the fixed beam 210 and the restraining member 310, so that the fixed beam 210 and the restraining member 310 can cooperate to restrain the battery cell assembly 100. Among them, since the height of the battery cell assembly 100 on the bearing surface 201 is higher than the height of the fixed beam 210, only a part of the connecting member 320 can be embedded in the first hollow area 211 and connected to the fixed beam 210, and the part of the connecting member 320 located outside the first hollow area 211 can be connected to the end of the restraining member 310 to make up for the height difference between the fixed beam 210 and the battery cell assembly 100, thereby reducing the probability of bending of the restraining member 310 after connecting with the fixed beam 210 due to the height difference. Of course, in some embodiments, the connecting members 320 may be entirely embedded in the first hollow area 211 , and the specific layout thereof may be adaptively adjusted according to design requirements.

[0082] The shape and size of the partial area of ​​the connecting member 320 embedded in the first hollow area 211 can match the first hollow area 211, so as to facilitate the connection between the connecting member 320 and the corresponding area of ​​the fixed beam 210. The material of the connecting member 320 can be a metal with high structural strength, such as a steel block, etc., to improve the tensile strength of the connecting member 320, thereby reducing the risk of failure of the connection between the restraining member 310 and the fixed beam 210. Of course, in addition to metal, the material of the connecting member 320 can also be selected according to the connection process of the restraining member 310 and the connecting member 320, and the connection process of the connecting member 320 and the fixed beam 210, as long as the connecting member 320 has sufficient structural strength.

[0083] In the above scheme, the restraining member 310 can be connected to the two fixed beams 210 respectively through the connecting members 320 at the opposite ends, and cooperate with the fixed beams 210 to restrain the battery cell assembly 100 on the bearing surface 201, so as to improve the connection tightness between the battery cell assembly 100 and the tray assembly 200, thereby reducing the probability of resonance between the battery cell assembly 100 and the tray assembly 200.

[0084] Please combine Figure 5 See also Figure 6 to Figure 7 , Figure 6 yes Figure 2 A top view of the middle battery device 10, Figure 7 yes Figure 6 A local enlarged schematic diagram of point B in the middle.

[0085] like Figure 6 to Figure 7 As shown, the connecting member 320 is also disposed adjacent to at least one supporting rib 213 .

[0086] The connector 320 may be embedded in the space separated by the plurality of support ribs 213 in the first hollow area 211 and located between two adjacent support ribs 213, and at least one of the two adjacent support ribs 213 may be disposed close to the connector 320. When the battery cell assembly 100 expands in the second direction Z, the restraint 310 transmits the expansion force generated by the battery cell assembly 100 to the fixed beam 210 through the connector 320, causing the partial area where the fixed beam 210 and the connector 320 are connected to be subjected to greater pressure, while the support ribs 213 may reinforce the partial area where the fixed beam 210 and the connector 320 are connected, so that the fixed beam 210 can better resist the expansion force transmitted by the battery cell assembly 100.

[0087] In the above solution, the support ribs 213 can be used to reinforce the part of the fixing beam 210 corresponding to the connecting member 320 , so that the fixing beam 210 can better resist the expansion force generated by the battery cell assembly 100 .

[0088] like Figure 6 to Figure 7 As shown, the cross section of the connecting member 320 may be a trapezoid, and have an upper bottom surface 321 and a lower bottom surface 322 arranged opposite to each other. Meanwhile, the fixing beam 210 has a first wall surface 214 away from the battery cell assembly 100 and a second wall surface 215 close to the battery cell assembly 100 in the first hollow area 211. The upper bottom surface 321 and the lower bottom surface 322 may contact the first wall surface 214 and the second wall surface 215 respectively.

[0089] The connector 320 may be arranged in a trapezoidal shape in appearance, so that the cross section of the connector 320 in the second direction Z may be a trapezoid. The upper bottom surface 321 of the connector 320 may contact the first wall surface 214 of the fixed beam 210, and the lower bottom surface 322 of the connector 320 may contact the second wall surface 215 of the fixed beam 210. When the battery cell assembly 100 expands in the second direction Z, the connector 320 may transfer the expansion force to the fixed beam 210 through the upper bottom surface 321 and the lower bottom surface 322, respectively, so as to use the fixed beam 210 to resist the expansion force generated by the battery cell assembly 100.

[0090] At the same time, since the second wall 215 is arranged close to the battery cell assembly 100, the pressure on the fixed beam 210 at the second wall 215 is greater than the pressure on the fixed beam 210 at the first wall 214. Therefore, by setting a lower bottom surface 322 with a larger area than the upper bottom surface 321 to contact the second wall 215, the contact area between the connecting member 320 and the fixed beam 210 can be increased, so that the expansion force of the battery cell assembly 100 can be transmitted to the fixed beam 210 in a more dispersed manner, so as to reduce the probability of deformation of the fixed beam 210 due to excessive local pressure.

[0091] In the above scheme, the upper bottom surface 321 and the lower bottom surface 322 of the connector 320 can be respectively in contact with the first wall surface 214 and the second wall surface 215 of the fixed beam 210, so that the connector 320 can transfer the expansion force generated by the battery cell assembly 100 to the fixed beam 210, so as to use the fixed beam 210 to resist the expansion force generated by the battery cell assembly 100. At the same time, the trapezoidal design of the connector 320 can also reduce the weight and material cost of the connector 320, and the lower bottom surface 322 with a larger area is in contact with the second wall surface 215 of the fixed beam 210 close to the battery cell assembly 100, which can also reduce the probability of the fixed beam 210 being deformed due to excessive local pressure. In addition, the trapezoidal design of the connector 320 can also form an obtuse angle between the connector 320 and the second wall surface 215, so as to reserve a larger space for the connector 320 to connect with the fixed beam 210.

[0092] In some embodiments, the connector 320 is not limited to being a trapezoid, and the specific shape of the connector 320 can also be adaptively adjusted according to the shape and design requirements of the first hollow area 211. For example, the shape of the connector 320 can also be a rectangle, etc., which are not listed here in this embodiment.

[0093] like Figure 7 As shown, the connecting member 320 may have a plurality of welds 323 formed by welding with the fixing beam 210 , and the extending direction of the welds 323 may be perpendicular to the bearing surface 201 .

[0094] The connecting member 320 and the fixed beam 210 can be connected by welding, and the position where the weld 323 is formed can be at the side of the connecting member 320 perpendicular to the bearing surface 201. That is, the side of the connecting member 320 parallel to the second direction X can be welded to the fixed beam 210 to form the aforementioned weld 323. Among them, when the connecting member 320 is a trapezoid, the connecting member 320 can have four sides perpendicular to the bearing surface 201, that is, parallel to the second direction X, and the connecting member 320 can be welded to the fixed beam 210 at the aforementioned four sides to form four welds 323 extending in a direction perpendicular to the bearing surface 201.

[0095] In some embodiments, the number of welds 323 formed by welding the connecting member 320 and the fixing beam 210 will also vary with the shape of the connecting member 320. For example, when the connecting member 320 is in a triangular shape, the number of welds 323 can be three, and the extending direction of the welds 323 only needs to be perpendicular to the bearing surface 201.

[0096] In the above solution, the weld 323 formed by welding the connecting member 320 and the fixing beam 210 can be formed at the side of the connecting member 320 perpendicular to the bearing surface 201, so that the weld 323 will not affect the connection between the connecting member 320 and the restraining member 310, so as to omit the process of grinding the weld 323, thereby reducing the production cost of the tray assembly 200. That is, since the side of the connecting member 320 away from the bearing surface 201 needs to be connected to the restraining member 310, if the connecting member 320 and the fixing beam 210 are welded on the side of the connecting member 320 away from the bearing surface 201, the weld 323 formed by welding needs to be ground, otherwise it will affect the connection between the connecting member 320 and the restraining member 310.

[0097] In some embodiments, the connection between the connector 320 and the fixed beam 210 may not be limited to welding. The specific connection method between the connector 320 and the fixed beam 210 can be adaptively selected according to their materials, and only needs to meet the required connection strength of both.

[0098] like Figures 5 to 7 As shown, in order to achieve the connection between the restraint member 310 and the connecting member 320, the restraint assembly 300 may further include: two fasteners 330. The two fasteners 330 may be respectively disposed at opposite ends of the restraint member 310 and respectively inserted into the two connecting members 320 to fix the restraint member 310 and the connecting member 320. The following description will only take a single fastener 330 as an example.

[0099] One end of the fastener 330 can be passed through the end of the binding member 310 along the second direction Z, and inserted into the connecting member 320 from the side of the connecting member 320 away from the bearing surface 201, so as to fasten the end of the binding member 310 and the connecting member 320 together. For example, the fastener 330 can be a bolt, and the end of the binding member 310 and the connecting member 320 can be provided with a screw hole that matches the fastener 330, so that the fastener 330 can fix the end of the binding member 310 and the connecting member 320. Of course, in some embodiments, in addition to the bolt and the screw hole, the fastener 330 can also be other structural members that can fix the binding member 310 and the connecting member 320, and it is only necessary that the end of the binding member 310 can be connected to the connecting member 320.

[0100] In the above solution, two fasteners 330 can be used to fix the opposite ends of the tie member 310 and the two connectors 320 together, so that the tie member 310 can be connected to the fixed beam 210 through the connector 320 to tie the battery cell assembly 100 to the bearing surface 201. At the same time, by connecting the tie member 310 and the connector 320 through the fastener 330, the installation convenience of the tie member 310 and the connector 320 can also be improved.

[0101] In some embodiments, in addition to fixing the end of the tie member 310 and the connector 320 by the fastener 330, the end of the tie member 310 and the connector 320 may also be connected by welding. Alternatively, the end of the tie member 310 and the connector 320 may be connected by welding and bolting at the same time to improve the connection reliability of the tie member 310 and the connector 320.

[0102] The electric device 1 provided in the present application may include the battery device 10 in any of the aforementioned embodiments, and the battery device 10 may be used to provide electric energy for the electric device 1. Thus, the battery device 10 with high reliability may be used to provide electric energy for the electric device 1, so as to reduce the probability of power failure of the electric device 1 due to a failure of the battery device 10.

[0103] Finally, in some specific application scenarios, in order to solve the problem of insufficient reliability of the existing tray assembly. The battery device 10 provided in the embodiment of the present application may include: a battery cell assembly 100, a tray assembly 200 and a restraining assembly 300; the battery cell assembly 100 is arranged on the bearing surface 201 of the tray assembly 200, and the tray assembly 200 also has two fixed beams 210 arranged on the bearing surface 201 and respectively located on opposite sides of the battery cell assembly 100; the fixed beam 210 has a first hollow area 211, and the first hollow area 211 is formed with an opening on the side of the fixed beam 210 away from the bearing surface 201; the restraining assembly 300 is located on the side of the battery cell assembly 100 away from the bearing surface 201; the opposite ends of the restraining assembly 300 are respectively embedded in the first hollow areas 211 of the two fixed beams 210, so as to cooperate with the fixed beams 210 to restrain the battery cell assembly 100 on the bearing surface 201.

[0104] The tray assembly 200 also includes: a tray 220 integrally die-cast with the fixed beam 210; the tray 220 has a bearing surface 201, and is enclosed together with the two fixed beams 210 to form a limited space 202 for accommodating the battery cell assembly 100. The restraint assembly 300 includes: a restraint member 310 and a connector 320; the restraint member 310 is arranged on the side of the battery cell assembly 100 away from the bearing surface 201, and the opposite ends of the restraint member 310 are provided with connectors 320; the two connectors 320 are respectively embedded in the first hollow area 211 of the two fixed beams 210. The fixed beam 210 has a plurality of support ribs 213 located in the first hollow area 211; the plurality of support ribs 213 are arranged in the first hollow area 211 at intervals along the length direction of the fixed beam 210. The connector 320 is arranged adjacent to at least one support rib 213.

[0105] The battery device 10 provided in the embodiment of the present application is provided with a first hollow area 211 on the fixed beam 210, and the first hollow area 211 forms an opening on the side of the fixed beam 210 away from the bearing surface 201, so that the end of the restraint assembly 300 can be embedded in the first hollow area 211 of the fixed beam 210 from the opening, so as to cooperate with the fixed beam 210 to restrain the battery cell assembly 100 on the bearing surface 201. At the same time, by providing the first hollow area 211 for the end of the restraint assembly 300 to be embedded, the connection between the fixed beam 210 and the restraint assembly 300 is realized, and the structural design of the fixed beam 210 can also be simplified, so that the tray assembly 200 can be processed in one piece, so as to improve the structural strength of the tray assembly 200, thereby enhancing the reliability of the tray assembly 200.

[0106] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: The battery device comprises: a battery cell assembly, a tray assembly and a restraint assembly; The battery cell assembly is arranged on the bearing surface of the tray assembly, and the tray assembly further comprises two fixing beams arranged on the bearing surface and respectively located on opposite sides of the battery cell assembly; the fixing beam comprises a first hollow area, and the first hollow area forms an opening on a side of the fixing beam away from the bearing surface; The restraining assembly is located on a side of the battery monomer assembly away from the bearing surface; the opposite ends of the restraining assembly are respectively embedded in the first hollow areas of the two fixed beams to cooperate with the fixed beams to restrain the battery monomer assembly on the bearing surface.

2. The battery device according to claim 1, characterized in that: The restraint assembly comprises: a restraint member and a connecting member; The restraining member is arranged on a side of the battery cell assembly away from the bearing surface, and the connecting members are arranged at opposite ends of the restraining member; the two connecting members are respectively embedded in the first hollow areas of the two fixing beams.

3. The battery device according to claim 2, characterized in that: The fixed beam has a plurality of support ribs located in the first hollow area; A plurality of the support ribs are arranged in the first hollow area at intervals along the length direction of the fixed beam.

4. The battery device according to claim 3, characterized in that: The connecting member is arranged adjacent to at least one of the supporting ribs.

5. The battery device according to claim 2, characterized in that: The cross section of the connecting piece is trapezoidal and has an upper bottom surface and a lower bottom surface that are arranged oppositely; The fixed beam has a first wall surface away from the battery monomer assembly and a second wall surface close to the battery monomer assembly in the first hollow area; the upper bottom surface and the lower bottom surface are in contact with the first wall surface and the second wall surface respectively.

6. The battery device according to claim 2, characterized in that: The connecting member has a plurality of welds formed by welding with the fixing beam, and the extending direction of the welds is perpendicular to the bearing surface.

7. The battery device according to claim 2, characterized in that: The tie-down assembly further includes: two fasteners; The two fasteners are respectively passed through the opposite ends of the binding member and are respectively inserted into the two connecting members to fix the binding member and the connecting member.

8. The battery device according to claim 1, characterized in that: The tray assembly further includes: a tray integrally die-casted with the fixed beam; The tray has the bearing surface and is arranged together with the two fixing beams to form a limiting space for accommodating the battery monomer assembly.

9. The battery device according to claim 8, characterized in that: The fixed beam further has a second hollow area, and the second hollow area forms an opening on a side of the tray away from the bearing surface.

10. The battery device according to claim 2, characterized in that: The number of the battery cell assemblies is multiple, and the number of the restraining assemblies is also multiple; A plurality of battery cell assemblies are sequentially arranged on the bearing surface along the length direction of the fixing beam; The single restraining assembly is arranged on a side of the battery monomer assembly away from the carrying surface, and is located on a partial area where two adjacent battery monomer assemblies are close to each other.

11. An electrical device, characterized in that: The electrical device comprises: the battery device according to any one of claims 1-10.

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