Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and the battery device comprises a battery box body which is provided with a first end and a second end which are oppositely arranged; the battery monomers are accommodated in the battery box body; the supporting frame comprises a first support and a second support which are oppositely arranged; the first bracket comprises a plurality of first cross beams, and the second bracket comprises a plurality of second cross beams; wherein the first end is provided with a first supporting leg, and the second end is provided with a second supporting leg; the battery box body is arranged between the first bracket and the second bracket; the first supporting leg is lapped on the first cross beam, and the second supporting leg is lapped on the second cross beam; the battery box body comprises a lower box body and an upper cover body; the lower box body comprises an annular side wall and a bottom wall; part of the first supporting leg and part of the second supporting leg are connected with the annular side wall. In this way, the annular side wall can share the stress of the supporting legs, and then the reliability of the whole battery device is improved.

Description

Technical Field

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

[0002] With the continuous development of the application of power batteries, higher requirements are placed on the energy density of battery devices. However, in related technologies, due to the limitation of installation space, the size of the battery device is limited, which limits the improvement of the energy density of the battery device. Utility Model Content

[0003] The main technical problem solved by the present application is to provide a battery device and an electrical device capable of improving the energy density of the battery device.

[0004] In order to solve the above technical problems, in a first aspect, a technical solution adopted by the present application is to provide a battery device, comprising:

[0005] A battery box having a first end and a second end disposed opposite to each other;

[0006] A battery cell is contained in the battery box;

[0007] The support frame comprises a first bracket and a second bracket arranged opposite to each other; the first bracket comprises a plurality of first cross beams, and the second bracket comprises a plurality of second cross beams;

[0008] Among them, the first end has a first leg, and the second end has a second leg; the battery box is arranged between the first bracket and the second bracket; the first leg is overlapped on the first beam, and the second leg is overlapped on the second beam; the battery box includes a lower box body and an upper cover body; the lower box body includes an annular side wall and a bottom wall; part of the first leg and part of the second leg are connected to the annular side wall.

[0009] In the above technical solution, by setting the first leg to overlap the first beam and the second leg to overlap the second beam, the two layers of battery boxes can be closer together to save space, thereby increasing the number of battery boxes in the battery device and improving the energy density of the battery device; the battery box includes a lower box and an upper cover; the lower box includes an annular side wall and a bottom wall; part of the first leg and part of the second leg are connected to the annular side wall, and the annular side wall can also share the stress of the legs, thereby further improving the reliability of the entire battery device.

[0010] In some embodiments, one end of the first leg away from the first end is flush with the outer side of the first bracket; one end of the second leg away from the second end is flush with the outer side of the second bracket.

[0011] In the above technical solution, by setting the end of the first leg away from the first end to be flush with the outer side surface of the first bracket, and the end of the second leg away from the second end to be flush with the outer side surface of the second bracket, the volume of the battery device will not be increased, and the overlapping surface between the leg and the beam can be increased, thereby improving the stability of the connection.

[0012] In some embodiments, the first bracket further comprises a plurality of first vertical beams connected to the plurality of first horizontal beams, the first end comprises a plurality of first legs, the plurality of first legs are arranged at intervals along the first horizontal beams, and the first legs are staggered with the first vertical beams;

[0013] The second bracket also includes a plurality of second vertical beams connected to the plurality of second horizontal beams. The second end has a plurality of second supporting legs, and the plurality of second supporting legs are arranged at intervals along the second horizontal beams, and the second supporting legs are staggered with the second vertical beams.

[0014] In the above technical solution, by arranging multiple first legs spaced apart along the first horizontal beam, and the first legs are staggered with the first vertical beam, and multiple second legs are spaced apart along the second horizontal beam, and the second legs are staggered with the second vertical beam, the connection strength between the battery box and the support frame is increased, thereby further improving the overall reliability of the battery device.

[0015] In some embodiments, the battery case includes a lower case and an upper cover; the lower case includes an annular side wall and a bottom wall; the top edge of the annular side wall has a flange extending into the interior of the battery case and located at the top of a portion of the battery cell; the edge of the upper cover is stacked and fixedly connected to the flange.

[0016] In the above technical solution, the battery box includes a lower box and an upper cover; the lower box includes an annular side wall and a bottom wall; the top edge of the annular side wall has a flange extending into the inside of the battery box and located at the top of part of the battery cell; the edge of the upper cover is stacked and fixedly connected with the flange, that is, the top edge of the annular side wall is turned inward, so that the interference of the top edge of the annular side wall on the support frame can be reduced, saving the installation space inside the support frame, thereby increasing the number of battery boxes in the battery device and improving the energy density of the battery device. When the width of the flange is greater than the length of the leg, if the flange is set outward, the volume of the battery device will increase or the energy density of the battery device will decrease.

[0017] In some embodiments, the width of the flange is smaller than the width of the battery cell.

[0018] In the above technical solution, by setting the width of the flange to be smaller than the width of the battery cell, it is convenient for the battery cell to enter the battery box and to be installed.

[0019] In some embodiments, the support frame also includes a third bracket and a fourth bracket arranged relatively to each other; the first bracket, the third bracket, the second bracket and the fourth bracket are connected in sequence to form a hollow structure; the first bracket is detachably connected to other parts of the hollow structure.

[0020] In the above technical solution, the support frame also includes a third bracket and a fourth bracket that are relatively arranged; the first bracket, the third bracket, the second bracket and the fourth bracket are connected in sequence to form a hollow structure; the first bracket and the other parts of the hollow structure are detachably connected, so that the battery box can be placed into the hollow structure from one side of the first bracket, and then the first bracket and the other parts of the hollow structure can be installed and fixed, which is easy to operate and improves installation efficiency. In addition, it is also conducive to the replacement and maintenance of the detachable connection structure.

[0021] In some embodiments, the plurality of battery boxes are arranged in multiple layers, each layer having two battery boxes; one of the two battery boxes located on the same layer is fixedly connected to the third bracket, and the other battery box is fixedly connected to the fourth bracket.

[0022] In the above technical solution, multiple battery cases are arranged in multiple layers, each layer has two battery cases; one of the two battery cases on the same layer is fixedly connected to the third bracket, and the other battery case is fixedly connected to the fourth bracket. This facilitates the installation process. Before the first bracket is installed and fixed to other parts of the hollow structure, the battery case is first fixed by the third bracket or the fourth bracket in cooperation with the second bracket, which is beneficial to the installation and fixation of the battery case and can improve the reliability of the battery device as a whole. Since each layer has two battery cases, each battery case can be connected and fixed to the third bracket or the fourth bracket, thereby improving the reliability of the battery device as a whole.

[0023] In some of the embodiments, in two adjacent layers of the battery case, the top surface of the battery case at the bottom layer fits with the bottom surface of the battery case at the top layer.

[0024] In the above technical solution, by setting two adjacent layers of battery boxes, the top surface of the battery box at the bottom is fitted with the bottom surface of the battery box at the top. This fitting method can improve space utilization, make the battery device more compact, and install more battery capacity in a limited space; in addition, close fitting is conducive to more stable electrical connections, which can reduce line length and connection points, reduce resistance, improve efficiency and reliability, and reduce the impact of external electromagnetic interference on signals.

[0025] In some of the embodiments, the support frame further includes a top bracket and a bottom bracket, the top bracket is connected to the top end of the hollow structure, and the bottom bracket is connected to the bottom end of the hollow structure.

[0026] In the above technical solution, by setting the support frame also including a top bracket and a bottom bracket, the top bracket is connected to the top end of the hollow structure, and the bottom bracket is connected to the bottom end of the hollow structure, the stability of the support frame is further improved, which is beneficial to protecting the battery box.

[0027] In some embodiments, the battery box includes a lower box body and an upper cover body; the lower box body includes an annular side wall and a bottom wall; the first support leg and the second support leg are both connected to the bottom wall.

[0028] In the above technical solution, the battery box includes a lower box body and an upper cover body; the lower box body includes an annular side wall and a bottom wall; the first support leg and the second support leg are both connected to the bottom wall, so that the bottom wall and the first support leg and the second support leg can all support the battery cells arranged in the battery box, and the bottom wall can share the stress generated by the support legs when overlapping with the bracket.

[0029] In some embodiments, the bottom surface of the first support leg and the bottom surface of the second support leg are both flush with the bottom surface of the bottom wall; the thickness of the first support leg and the thickness of the second support leg are both greater than the thickness of the bottom wall.

[0030] In the above technical solution, the bottom surface of the first support leg and the bottom surface of the second support leg are both flush with the bottom surface of the bottom wall; the thickness of the first support leg and the thickness of the second support leg are both greater than the thickness of the bottom wall. This is beneficial to improving the mechanical strength of the first support leg and the second support leg, and improving the mechanical strength of the battery box. In addition, the first support leg and the second support leg are also partially connected to the annular side wall, and the annular side wall can also share the stress of the support legs, thereby further improving the reliability of the entire battery device.

[0031] To solve the above technical problems, in a second aspect, another technical solution adopted in the present application is to provide an electrical device, including a battery device provided by any one of the above embodiments of the electrical device, wherein the battery device is electrically connected to the electrical device.

[0032] In the above technical solution, by setting the first leg to overlap the first beam and the second leg to overlap the second beam, the two layers of battery boxes can be closer together to save space, thereby increasing the number of battery boxes in the battery device and improving the energy density of the battery device; the battery box includes a lower box and an upper cover; the lower box includes an annular side wall and a bottom wall; part of the first leg and part of the second leg are connected to the annular side wall, and the annular side wall can also share the stress of the legs, thereby further improving the reliability of the entire battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 is a schematic diagram of the three-dimensional structure of a battery device provided in some embodiments of the present application;

[0035] Figure 2 yes Figure 1 A side view of a battery device in FIG.

[0036] Figure 3 yes Figure 2 A cross-sectional view of the battery device along line III-III;

[0037] Figure 4 is a schematic diagram of the structure of a battery box provided in some embodiments of the present application;

[0038] Figure 5 yes Figure 4 A cross-sectional view of the battery case along line VV;

[0039] Figure 6 is a schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0040] Figure 7 It is a schematic diagram of the structure of electrical equipment provided in some embodiments of the present application.

[0041] Description of Figure Numbers:

[0042] 100-battery device, 10-battery case, 11-first end, 110-first support leg, 12-second end, 120-second support leg, 13-lower case, 131-annular side wall, 132-bottom wall, 133-flange, 14-upper cover, 20-battery cell, 21-end cover, 21a-electrode terminal, 22-shell, 23-electrode assembly, 23a-ear, 30-support frame, 31-first bracket, 310 first cross beam, 311-first vertical beam, 32-second bracket, 320-second cross beam, 321-second vertical beam, 33-third bracket, 34-fourth bracket, 35-top bracket, 36-bottom bracket, 1000-electrical equipment, 200-electrical components. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art 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 the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0045] 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.

[0046] 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 (including two), such as two, three, etc., unless otherwise clearly and specifically defined. Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. 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.

[0048] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship between the components in a certain specific posture (as shown in the drawings) based on the drawings, and 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 and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0049] 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 ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0050] In the present application, battery cells may include lithium-ion battery cells, sodium-ion battery cells or magnesium-ion battery cells, etc. Battery cells may be cylindrical, flat or in other shapes, etc. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells. For the convenience of description, the following embodiments are described by taking lithium-ion batteries as an example.

[0051] With the continuous development of the application of power batteries, higher requirements are placed on the energy density of battery devices. However, in related technologies, due to the limitation of installation space, the size of the battery device is limited, which limits the improvement of the energy density of the battery device.

[0052] In the related art, in electric equipment such as new energy vehicles, for example, the battery box of commercial vehicles (especially heavy trucks) is usually installed inside or outside the vehicle's beam or mounted on the beam, and usually requires a mounting bracket to fix the battery box on the beam. Due to the design of the mounting bracket and the beam, the size of the battery box is limited. For example, the mounting bracket supports the battery box through the frame, so that the two layers of the battery box are isolated by the frame, affecting the space utilization rate.

[0053] In order to improve the energy density of a battery device, an embodiment of the present application provides a battery device, which includes a battery case, a battery cell and a support frame; the battery case has a first end and a second end arranged opposite to each other; the battery cell is accommodated in the battery case; the support frame includes a first bracket and a second bracket arranged opposite to each other; the first bracket includes a plurality of first cross beams, and the second bracket includes a plurality of second cross beams; wherein the first end has a first leg, and the second end has a second leg; the battery case is arranged between the first bracket and the second bracket; the first leg is overlapped on the first cross beam, and the second leg is overlapped on the second cross beam; the battery case includes a lower case and an upper cover; the lower case includes an annular side wall and a bottom wall; part of the first leg and part of the second leg are connected to the annular side wall.

[0054] In this embodiment, by arranging the first leg to overlap the first beam and the second leg to overlap the second beam, the two layers of battery boxes can be brought closer together to save space, thereby increasing the number of battery boxes in the battery device and improving the energy density of the battery device; the battery box includes a lower box and an upper cover; the lower box includes an annular side wall and a bottom wall; part of the first leg and part of the second leg are connected to the annular side wall, and the annular side wall can also share the stress of the legs, thereby further improving the reliability of the entire battery device.

[0055] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0056] See also Figure 1-Figure 5 ,in, Figure 1 is a schematic diagram of a three-dimensional structure of a battery device 100 provided in some embodiments of the present application; Figure 2 yes Figure 1 A side view of the battery device 100; Figure 3 yes Figure 2 A cross-sectional view of the battery device 100 along line III-III; Figure 4 is a schematic structural diagram of a battery box 10 provided in some embodiments of the present application; Figure 5 yes Figure 4 A cross-sectional view of the battery case 10 along line VV.

[0057] The battery device 100 in the embodiment of the present application includes a battery case 10, a battery cell 20 and a support frame 30. The battery case 10 has a first end 11 and a second end 12 arranged opposite to each other, and the battery cell 20 is accommodated in the battery case 10; the support frame 30 includes a first bracket 31 and a second bracket 32 ​​arranged opposite to each other; the first bracket 31 includes a plurality of first beams 310, and the second bracket 32 ​​includes a plurality of second beams 320; wherein the first end 11 has a first leg 110, and the second end 12 has a second leg 120; the battery case 10 is arranged between the first bracket 31 and the second bracket 32; the first leg 110 is overlapped on the first beam 310, and the second leg 120 is overlapped on the second beam 320.

[0058] The battery case 10 is used to provide a storage space for the battery cells 20. The battery case 10 can provide physical protection for the battery cells 20. For example, it can reduce the impact on the battery cells 20 when the vehicle encounters bumps and collisions during driving. It can also isolate adverse environmental factors such as moisture, dust, and corrosive gases to extend the service life of the battery cells 20. In some embodiments, the battery case 10 can also reduce the risk of thermal runaway of the battery cells 20, and have good insulation properties to reduce the probability of accidental electrical conduction and reduce the impact of electromagnetic radiation. The shape of the battery case 10 can be a variety of shapes, such as a cylinder, a cuboid, etc. The embodiment of the present application is introduced by taking the shape of the battery case 10 as a cuboid as an example.

[0059] The battery case 10 has a first end 11 and a second end 12 that are arranged opposite to each other, and both the first end 11 and the second end 12 have side beams or side walls for limiting the battery cell 20. Among them, the first end 11 has a first leg 110, and the second end 12 has a second leg 120. The first leg 110 and the second leg 120 can jointly provide a stable support for the main part of the battery case 10, so that it can maintain a stable placement state in the installation and use environment. For example, in a new energy vehicle, when the vehicle vibrates, shakes, or encounters bumps in different road conditions during driving, the first leg 110 and the second leg 120 can help the main part of the battery case 10 to be fixed in the corresponding position, reduce the displacement, collision, etc. caused by shaking, and thus improve the reliability of the battery device 100. In the embodiment of the present application, the battery case 10 includes a battery case body, a first leg 110 and a second leg 120, and the battery case body is the main part of the battery case 10, that is, the battery case 10 removes the first leg 110 and the second leg 120.

[0060] There may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the battery case 10; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the battery case 10. The battery device 100 may also include other structures. For example, the battery device 100 may also include a converging component for realizing electrical connection between the multiple battery cells 20. Among them, the battery cells 20 may be all the battery cells 20 located in the battery case 10, or may be part of the battery cells 20 in the battery case 10.

[0061] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0062] The battery cell 20 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the battery cell 20, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the tab. The positive electrode tab and the negative electrode tab can be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0063] Please also see Figure 6 , Figure 6 2 is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. A battery cell 20 refers to the smallest unit that constitutes a battery. Figure 6 The battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23 and other functional components.

[0064] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easy to deform when it is squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0065] The shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 22 and the end cap 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cap 21 at the opening. The end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 22, the end cap 21 is covered with the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0066] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be contained in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 23, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery cell 20, the positive active material and the negative active material react with the electrolyte, and the tab 23a connects the electrode terminal to form a current loop.

[0067] Please continue to see Figure 1-Figure 3 The support frame 30 is used to fix the battery box 10 or the battery module to reduce damage caused by vibration and impact. Its material is diverse and can be metal, plastic and composite materials. Among them, metals can include steel, alloy steel, aluminum, aluminum alloy and magnesium alloy, etc.; plastics can include thermosetting plastics and nylon / polypropylene blends, etc.; composite materials can include carbon fiber reinforced composite materials and glass fiber reinforced composite materials, etc.

[0068] The support frame 30 includes a first bracket 31 and a second bracket 32 ​​which are arranged opposite to each other. The first bracket 31 and the second bracket 32 ​​can limit and fix the battery box 10. The first bracket 31 includes a plurality of first beams 310, and the second bracket 32 ​​includes a plurality of second beams 320. The beam is a structural member placed horizontally (along the length direction of the support frame 30) to play a supporting and bearing role. In this embodiment, the first beam 310 and the second beam 320 can enhance the overall rigidity of the support frame 30, which can be beneficial to the lightweight of the battery device 100. The battery box 10 is arranged between the first bracket 31 and the second bracket 32, the first leg 110 is overlapped on the first beam 310, and the second leg 120 is overlapped on the second beam 320. Therefore, the distance between the two adjacent layers of the battery box 10 can be made closer, so that the space for the support frame 30 to store the battery box 10 and the battery cell 20 is further increased, thereby improving the energy density of the battery device 100 at the system level. In addition, the overlap of the first leg 110 and the first beam 310 and the second leg 120 and the second beam 320 can form a stable supporting structure, so that the battery box 10 can be firmly placed in a specific position. This overlapping method can prevent the battery box 10 from being easily displaced or tilted due to collision, vibration or shaking, thereby ensuring the reliability of the battery device 100.

[0069] In this embodiment, by arranging the first leg 110 to overlap the first beam 310 and the second leg 120 to overlap the second beam 320, the two layers of battery boxes 10 can be closer to each other, saving space, thereby increasing the number of battery boxes 10 in the battery device 100 and improving the energy density of the battery device 100.

[0070] In some embodiments, one end of the first leg 110 away from the first end 11 is flush with the outer side of the first bracket 31 ; one end of the second leg 120 away from the second end 12 is flush with the outer side of the second bracket 32 ​​.

[0071] The end of the first leg 110 away from the first end 11 refers to the end of the first leg 110 away from the battery box, that is, the free end. The outer side surface of the first bracket 31 refers to the surface of the first bracket away from the second bracket 32. In some embodiments, the end of the first leg 110 away from the first end 11 is flush with the outer side surface of the first beam 310, and the end of the second leg 120 away from the second end 12 is flush with the outer side surface of the second beam 320. In this way, the volume of the battery device 100 will not be increased, and the overlap surface between the leg and the beam can be increased, thereby improving the stability of the connection.

[0072] In some embodiments, the distance between the end surface of the first end 11 and the end surface of the second end 12 is equal to the distance between the inner side surface of the first bracket 31 and the inner side surface of the second bracket 32 ​​.

[0073] The end surface of the first end 11 refers to the surface of the side beam or side wall of the battery case 10 at the first end 11 away from the second end 12, and the end surface of the second end 12 refers to the surface of the side beam or side wall of the battery case 10 at the second end 12 away from the first end 11. The inner side surface of the first bracket 31 refers to the surface of the first bracket 31 close to the second bracket 32, and the inner side surface of the second bracket 32 ​​refers to the surface of the second bracket 32 ​​close to the first bracket 31. The distance between the end surface of the first end 11 and the end surface of the second end 12 is equal to the distance between the inner side surface of the first bracket 31 and the inner side surface of the second bracket 32. Therefore, the main body of the battery case 10 (that is, the part of the battery case 10 excluding the legs) can be just stuck between the first bracket 31 and the second bracket 32, so that the battery case 10 can have a larger size, accommodate more battery cells 20, and improve the energy density of the battery device 100.

[0074] In some embodiments, see Figure 1 and Figure 3 The first bracket 31 also includes a plurality of first vertical beams 311 connected to the plurality of first horizontal beams 310, and the first end 11 has a plurality of first legs 110, the plurality of first legs 110 are arranged at intervals along the first horizontal beams 310, and the first legs 110 are staggered with the first vertical beams 311; the second bracket 32 ​​also includes a plurality of second vertical beams 321 connected to the plurality of second horizontal beams 320, and the second end 12 has a plurality of second legs 120, the plurality of second legs 120 are arranged at intervals along the second horizontal beams 320, and the second legs 120 are staggered with the second vertical beams 321.

[0075] The vertical beam is a structural member placed in a vertical direction (in the height direction of the support frame 30) to bear and support the load. Multiple first vertical beams 311 and multiple first cross beams 310 form a regular column grid structure, and multiple second vertical beams 321 and multiple second cross beams 320 form a regular column grid structure, forming a stable space frame, which improves the stability of the support frame 30 and improves the reliability of the battery device 100 as a whole. Multiple first legs 110 are arranged at intervals along the first cross beam 310 and multiple second legs 120 are arranged at intervals along the second cross beam 320, which increases the connection strength between the battery box 10 and the support frame 30, and further improves the reliability of the battery device 100 as a whole. In some embodiments of the present application, the first legs 110 are staggered with the adjacent first vertical beams 311, and the second legs 120 are staggered with the second vertical beams 321, so that the legs and the vertical beams do not interfere with each other.

[0076] Please continue to see Figure 4 and Figure 5 The battery case 10 includes a lower case 13 and an upper cover 14; the lower case 13 includes an annular side wall 131 and a bottom wall 132; the top edge of the annular side wall 131 has a flange 133 extending into the battery case 10 and located on the top of a portion of the battery cell 20; the edge of the upper cover 14 is stacked and fixedly connected with the flange 133.

[0077] The lower box body 13 and the upper cover body 14 cover each other, and together define a storage space for accommodating the battery cell 20. In one embodiment, the lower box body 13 can be a hollow structure with one end open. Specifically, the lower box body 13 includes an annular side wall 131 and a bottom wall 132. The top edge of the annular side wall 131 has a flange 133 extending into the battery box body 10 and located on the top of part of the battery cell 20, that is, the sealing surface of the battery box body 10 adopts an inverted structure; the upper cover body 14 can be a plate-like structure, and the upper cover body 14 covers the open side of the lower box body 13. The edge of the upper cover body 14 is stacked and fixedly connected with the flange 133. The fixed connection method can be bolt connection, bayonet connection, welding connection or adhesive connection. In some embodiments, the annular side wall 131 and the bottom wall 132 are integrally formed so that the lower box body 13 can form a seamless integral structure with good integrity, evenly distribute stress, improve impact resistance and stability, and improve sealing, thereby improving the reliability of the battery device 100. In addition, the integrally formed design simplifies the production process, reduces the use of connecting parts, and improves production efficiency.

[0078] In other embodiments, the lower box body 13 and the upper cover body 14 may also be hollow structures with one side open, and the open side of the upper cover body 14 covers the open side of the lower box body 13. The upper cover body 14 may have a similar structure to the lower box body 13, and the side wall of the upper cover body 14 also forms an inverted surface, and the inverted surface of the upper cover body 14 and the inverted surface of the lower box body 13 are fitted and fixedly connected to each other.

[0079] In some embodiments, when placing multiple battery cells 20 (battery modules) into the battery case 10, first, the first battery cell 20 on the leftmost side is placed in the box. After the first battery cell 20 is hoisted into the box, it does not fall to the bottom first. The first battery cell 20 needs to be pushed to a preset position away from the side (for example, 5 mm away from the side) before it falls to the bottom; secondly, the first battery cell 20 on the rightmost side is placed in the box in the aforementioned manner; then, after the first battery cell 20 on the rightmost and leftmost sides are placed in the box, the second battery cell 20 and the third battery cell 20 are hoisted into the box, thereby completing the placement of the battery cells 20 into the box.

[0080] In this embodiment, the battery case 10 includes a lower case 13 and an upper cover 14; the lower case 13 includes an annular side wall 131 and a bottom wall 132; the top edge of the annular side wall 131 has a flange 133 extending into the inside of the battery case 10 and located at the top of a portion of the battery cells 20; the edge of the upper cover 14 is stacked and fixedly connected with the flange 133, that is, the top edge of the annular side wall 131 is turned inward, so that the interference of the top edge of the annular side wall 131 turned outward on the support frame 30 can be reduced, and the internal installation space of the support frame 30 can be saved, thereby increasing the number of battery cases 10 in the battery device 100 and improving the energy density of the battery device 100. When the width of the flange 133 is greater than the length of the leg, if the flange 133 is set outward, the volume of the battery device 100 will be increased or the energy density of the battery device 100 will be reduced.

[0081] Alternatively, if Figure 5 As shown, in some embodiments, the width of the flange 133 is less than the width of the battery cell 20 .

[0082] The width of the flange 133 refers to the distance between the two opposite sides of the inverted structure of the top edge of the annular side wall 131 along the X direction, that is, Figure 5 The plurality of battery cells 20 may be stacked in the battery case 10 along the width direction of the battery cells 20. The width of the battery cell 20 refers to the distance between the outer side surfaces of the two opposite side walls of the battery cell 20 along the X direction, that is, Figure 5 In some embodiments, Figure 1 As shown, the X direction refers to the width direction of the battery device 100 , the Y direction refers to the length direction of the battery device 100 , and the Z direction refers to the height direction of the battery device 100 .

[0083] In this embodiment, by setting the width of the flange 133 to be smaller than the width of the battery cell 20 , it is convenient for the battery cell 20 to enter the battery box 10 and to be installed.

[0084] Furthermore, in some embodiments, the support frame 30 also includes a third bracket 33 and a fourth bracket 34 that are relatively arranged; the first bracket 31, the third bracket 33, the second bracket 32 ​​and the fourth bracket 34 are connected in sequence to form a hollow structure; the first bracket 31 is detachably connected to other parts of the hollow structure.

[0085] The first bracket 31, the third bracket 33, the second bracket 32 ​​and the fourth bracket 34 are connected in sequence to form a hollow structure for fixing and limiting the battery case 10. The shape of the hollow structure can be a rectangular parallelepiped. The first bracket 31 is designed to be detachably connected to the other parts of the hollow structure. This design allows the bracket to be easily removed and reinstalled when necessary, which is convenient for maintenance, replacement of battery cells 20 or upgrading of the battery case 10. The detachable connection method can be a snap-on connection, a connecting bar, a plug-in interface, a bolt connection, etc. These detachable connection methods provide flexibility and convenience for the battery case 10 during maintenance, upgrading and replacement of battery cells 20, while also improving the stability of the connection and the overall performance of the battery case 10.

[0086] Furthermore, in the present embodiment, the support frame 30 also includes a third bracket 33 and a fourth bracket 34 which are relatively arranged; the first bracket 31, the third bracket 33, the second bracket 32 ​​and the fourth bracket 34 are sequentially connected to form a hollow structure; the first bracket 31 and the other parts of the hollow structure are detachably connected, so that the battery box 10 can be first placed into the hollow structure from one side of the first bracket 31, and then the first bracket 31 and the other parts of the hollow structure can be installed and fixed, which is easy to operate and improves the installation efficiency. In addition, it is also convenient for replacing and repairing the detachable connection structure.

[0087] Optionally, in some embodiments, multiple battery boxes 10 are arranged in multiple layers, each layer having two battery boxes 10; one of the two battery boxes 10 located on the same layer is fixedly connected to the third bracket 33, and the other battery box 10 is fixedly connected to the fourth bracket 34.

[0088] Specifically, multiple battery boxes 10 are stacked, and each layer has two battery boxes 10, so that more battery boxes 10 can be arranged in the vertical direction in a space of the same length and width. The battery boxes 10 of each layer can be overlapped on the corresponding first beam 310 through the first leg 110, and the second leg 120 can be overlapped on the corresponding second beam 320, so that the two layers of battery boxes 10 can be closer, saving space, and then the number of battery boxes 10 in the battery device 100 can be increased, and the energy density of the battery device 100 can be improved.

[0089] In this embodiment, multiple battery boxes 10 are arranged in multiple layers, each layer has two battery boxes 10; one of the two battery boxes 10 located in the same layer is fixedly connected to the third bracket 33, and the other battery box 10 is fixedly connected to the fourth bracket 34, so that during the installation process, before the first bracket 31 is installed and fixed to other parts of the hollow structure, the battery box 10 is first fixed by the third bracket 33 or the fourth bracket 34 in conjunction with the second bracket 32, which is conducive to the installation and fixation of the battery box 10, and can improve the reliability of the battery device 100 as a whole. Since each layer has two battery boxes 10, each battery box 10 can be connected and fixed to the third bracket 33 or the fourth bracket 34, which improves the reliability of the battery device 100 as a whole.

[0090] Optionally, in some embodiments, in two adjacent layers of battery casings 10 , the top surface of the layer of battery casings 10 located at the bottom is in contact with the bottom surface of the layer of battery casings 10 located at the top.

[0091] In this embodiment, this bonding method can improve space utilization, make the battery device 100 more compact, and install more battery capacity in a limited space; in addition, close fitting is conducive to more stable electrical connection, which can reduce line length and connection points, reduce resistance, improve efficiency and reliability, and reduce the impact of external electromagnetic interference on the signal.

[0092] Optionally, in some embodiments, the support frame 30 further includes a top bracket 35 and a bottom bracket 36 , wherein the top bracket 35 is connected to the top end of the hollow structure, and the bottom bracket 36 is connected to the bottom end of the hollow structure.

[0093] The top bracket 35 and the bottom bracket 36 are arranged on opposite sides of the hollow structure. The top bracket 35 and the bottom bracket 36 and the hollow structure (the first bracket 31, the second bracket 32, the third bracket 33 and the fourth bracket 34) can form a rectangular parallelepiped structure. The top bracket 35, the bottom bracket 36, the first bracket 31, the second bracket 32, the third bracket 33 and the fourth bracket 34 can be located on the six faces of the rectangular parallelepiped structure respectively. In this way, the stability of the support frame 30 is further improved, which is conducive to protecting the battery box 10.

[0094] In some embodiments, the battery box includes a lower box body 13 and an upper cover body 14 ; the lower box body 13 includes an annular side wall 131 and a bottom wall 132 ; the first leg 110 and the second leg 120 are both connected to the bottom wall 132 .

[0095] Optionally, the first leg 110 and the second leg 120 may be disposed on one side of the annular side wall 131, or on one side of the bottom wall 132, or partially disposed on one side of the annular side wall 131, and partially disposed on one side of the bottom wall 132. There are multiple ways to connect the first leg 110 and the second leg 120 to the bottom wall, one possible way of which is that the first leg 110 and the second leg 120 are both welded to the bottom wall 132, in another possible way, the first leg 110 and the second leg 120 may be fixed to the bottom wall 132 by screwing, and in another possible way, the first leg 110 and the second leg 120 are both integrally formed with the bottom wall 132.

[0096] In this embodiment, the battery case includes a lower case 13 and an upper cover 14, and the lower case 13 includes an annular side wall 131 and a bottom wall 132; the first support leg 110 and the second support leg 120 are both connected to the bottom wall 132, so that the bottom wall 132 and the first support leg 110 and the second support leg 120 can all support the battery cell 20 arranged in the battery case 10, and the bottom wall 132 can share the stress generated by the support legs when overlapping with the bracket.

[0097] In some embodiments, the annular side wall 131 and the bottom wall 132 may also be an integrally formed structure, so that the lower box body 13 may form a seamless integral structure with good integrity, uniform stress distribution, improved impact resistance and stability, improved sealing, and improved reliability of the battery device 100. In addition, the integrally formed design simplifies the production process, reduces the use of connecting parts, and improves production efficiency. The annular side wall 131 and the bottom wall 132 may also be detachably connected.

[0098] Furthermore, in some embodiments, the first leg 110 and the second leg 120 are integrally formed with the annular side wall 131, or the first leg 110 and the second leg 120 are integrally formed with the bottom wall 132. The integrally formed design can improve the overall mechanical strength of the battery box 10, and when the first leg 110 and the second leg 120 are integrally formed with the bottom wall 132, the bottom wall 132 can share the stress generated when the legs overlap with the bracket.

[0099] In some embodiments, the bottom surface of the first leg 110 and the bottom surface of the second leg 120 are both flush with the bottom surface of the bottom wall 132 ; the thickness of the first leg 110 and the thickness of the second leg 120 are both greater than the thickness of the bottom wall 132 .

[0100] Flush means that the battery device 100 is flush with the Figure 5In the placement position shown, the surface of the first leg 110 away from the upper cover 14, the surface of the second leg 120 away from the upper cover 14 and the surface of the bottom wall 132 of the battery box 10 away from the upper cover 14 are at the same level, and no part protrudes in the opposite direction of the Z direction, which is a state of the bottom surface being flush. This state allows the battery box 10 to have a stable and uniform support when placed.

[0101] The thickness of the first support leg 110 refers to the distance between the surfaces of the first support leg 110 on opposite sides along the Z direction. Figure 5 H1 in; the thickness of the second leg 120 refers to the distance between the surfaces of the second leg 120 on opposite sides along the Z direction, such as Figure 5 H1 in; the thickness of the bottom wall 132 refers to the distance between the surfaces of the bottom wall 132 on opposite sides along the Z direction, such as Figure 5 H2 in the figure. The thickness of the first leg 110 and the thickness of the second leg 120 are both greater than the thickness of the bottom wall 132, which means that when the bottom surface of the first leg 110 and the bottom surface of the second leg 120 are flush with the bottom surface of the bottom wall 132, the top surface of the first leg 110 and the top surface of the second leg 120 are both higher than the bottom surface of the bottom wall 132. This is conducive to improving the mechanical strength of the first leg 110 and the second leg 120, and improving the mechanical strength of the battery box 10. In addition, the first leg 110 and the second leg 120 are also partially connected to the annular side wall 131, and the annular side wall 131 can also share the stress of the legs, thereby further improving the reliability of the entire battery device 100.

[0102] Please join us Figure 7 Some embodiments of the present application provide an electric device 1000, which includes an electric device 200 and a battery device 100, and the battery device 100 is electrically connected to the electric device 200.

[0103] The electrical equipment 1000 may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. 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, etc. Spacecraft include aircraft, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. For the convenience of description, the following embodiments are described by taking the electrical equipment 1000 as a vehicle as an example.

[0104] The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle. The battery device 100 may be provided at the bottom, head or tail of the vehicle. The battery device 100 may be used to power the vehicle. For example, the battery device 100 may be used as an operating power source for the vehicle. The vehicle may also include an electrical device (such as a controller) that is used to control the power supply of the battery device 100, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0105] In some embodiments of the present application, the battery device 100 can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. In addition, the power-consuming device 1000 can be a vehicle, and the power-consuming device 200 can be a lamp (such as a headlight, a rear lamp, etc.), a display screen, a dashboard, a control system (such as a controller), etc. of the vehicle. The power-consuming device 1000 can also include other parts, such as a frame, and the battery device 100 and the power-consuming device 200 are both installed on the vehicle body.

[0106] The electrical device 200 may be a component or device that can use electricity. The electrical device 200 may be a controller and an electronic component, etc. The controller may be a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0107] The battery device 100 may be any of the battery devices 100 provided in the above embodiments. The battery device 100 may be a device capable of providing electric energy to the electric device 200 .

[0108] In this embodiment, by arranging the first leg 110 to overlap the first beam 310 and the second leg 120 to overlap the second beam 320, the two layers of battery boxes 10 can be closer to each other, saving space, thereby increasing the number of battery boxes 10 in the battery device 100 and improving the energy density of the battery device 100.

[0109] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0110] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0111] The above description is only an implementation method of the present application, and does not 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 used 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: include: A battery box having a first end and a second end disposed opposite to each other; A battery cell is contained in the battery box; The support frame comprises a first bracket and a second bracket arranged opposite to each other; the first bracket comprises a plurality of first cross beams, and the second bracket comprises a plurality of second cross beams; Among them, the first end has a first leg, and the second end has a second leg; the battery box is arranged between the first bracket and the second bracket; the first leg is overlapped on the first beam, and the second leg is overlapped on the second beam; the battery box includes a lower box body and an upper cover body; the lower box body includes an annular side wall and a bottom wall; part of the first leg and part of the second leg are connected to the annular side wall.

2. The battery device according to claim 1, characterized in that: One end of the first leg away from the first end is flush with the outer side surface of the first bracket; one end of the second leg away from the second end is flush with the outer side surface of the second bracket.

3. The battery device according to claim 1, characterized in that: The distance between the end surface of the first end and the end surface of the second end is equal to the distance between the inner side surface of the first bracket and the inner side surface of the second bracket.

4. The battery device according to claim 1, characterized in that: The first bracket further comprises a plurality of first vertical beams connected to the plurality of first horizontal beams, the first end comprises a plurality of first legs, the plurality of first legs are arranged at intervals along the first horizontal beams, and the first legs are staggered with the first vertical beams; The second bracket also includes a plurality of second vertical beams connected to the plurality of second horizontal beams. The second end has a plurality of second supporting legs, and the plurality of second supporting legs are arranged at intervals along the second horizontal beams, and the second supporting legs are staggered with the second vertical beams.

5. The battery device according to claim 1, characterized in that: The top edge of the annular side wall has a flange extending toward the inside of the battery box and located at the top of a portion of the battery monomer; the edge of the upper cover body is stacked and fixedly connected with the flange.

6. The battery device according to claim 5, characterized in that: The width of the flange is smaller than the width of the battery cell.

7. The battery device according to any one of claims 1 to 6, characterized in that: The support frame also includes a third bracket and a fourth bracket arranged opposite to each other; the first bracket, the third bracket, the second bracket and the fourth bracket are connected in sequence to form a hollow structure; the first bracket is detachably connected to other parts of the hollow structure.

8. The battery device according to claim 7, characterized in that: The plurality of battery boxes are arranged in multiple layers, each layer having two battery boxes; one of the two battery boxes located in the same layer is fixedly connected to the third bracket, and the other battery box is fixedly connected to the fourth bracket.

9. The battery device according to claim 8, characterized in that: In two adjacent layers of the battery cases, the top surface of the battery case at the bottom layer is in contact with the bottom surface of the battery case at the top layer.

10. The battery device according to claim 7, characterized in that: The support frame further comprises a top bracket and a bottom bracket, wherein the top bracket is connected to the top end of the hollow structure, and the bottom bracket is connected to the bottom end of the hollow structure.

11. The battery device according to any one of claims 1 to 6, characterized in that: The first supporting leg and the second supporting leg are both connected to the bottom wall.

12. The battery device according to claim 10, characterized in that: The bottom surface of the first supporting leg and the bottom surface of the second supporting leg are both flush with the bottom surface of the bottom wall; the thickness of the first supporting leg and the thickness of the second supporting leg are both greater than the thickness of the bottom wall.

13. An electrical equipment, characterized in that: It comprises an electrical device and a battery device as described in any one of claims 1 to 12, wherein the battery device is electrically connected to the electrical device.

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