Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a battery monomer and a box body, the box body comprises a mounting plate and a frame, and the mounting plate and the frame form a cavity for accommodating the battery monomers; wherein the mounting plate comprises a first area and a second area located on the inner side of the first area, at least part of the first area is connected with the frame, and the thickness H1 of the first area in the first direction and the thickness H2 of the second area in the first direction meet the condition that H1 is larger than H2. The structure of the mounting plate is optimized, the first area, connected with the frame, of the mounting plate is specifically set to be the relatively thick area, the strength of the first area can be enhanced, and the strength requirement for connection of the mounting plate and the frame is met; the area, close to the middle, of the mounting plate is a relatively thin area, the weight requirement of the mounting plate can be met, and the risk that the weight of the mounting plate is too large is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device and an electric device. Background Art

[0002] In the related art, the structure of the battery device is unreasonable, and there are problems such as insufficient local structural strength or excessive overall weight, which need to be improved. Utility Model Content

[0003] The present application provides a battery device and an electrical device to meet the strength requirements of the connection between the mounting plate and the frame and the weight requirements of the mounting plate.

[0004] In a first aspect, an embodiment of the present application provides a battery device, including:

[0005] Battery cells;

[0006] A box body, comprising a mounting plate and a frame, wherein the mounting plate and the frame form a cavity for accommodating the battery cell;

[0007] The mounting plate includes a first area and a second area located inside the first area, at least part of the first area is connected to the frame, and a thickness H1 of the first area along a first direction and a thickness H2 of the second area along the first direction satisfy: H1>H2.

[0008] In the above technical solution, by optimizing the structure of the mounting plate, the first area of ​​the mounting plate connected to the frame is specifically set as a relatively thick area, which can enhance the strength of the first area and meet the strength requirement of the mounting plate connected to the frame; the mounting plate is set as a relatively thin area near the middle area, which can meet the weight requirement of the mounting plate and reduce the risk of excessive weight of the mounting plate.

[0009] In some embodiments, the first area is disposed on both sides of the second area along the second direction;

[0010] The frame includes a frame body and a mounting beam, wherein the mounting beam is disposed on both sides of the frame body along a second direction; at least a portion of the first area is connected to the mounting beam.

[0011] In some embodiments, the first region includes a first portion and a second portion that are connected, the first portion overlaps and is connected to the frame along a first direction, and the second portion is connected to the second region.

[0012] In some embodiments, a width L of the first region along the second direction satisfies: 10 mm ≤ L ≤ 100 mm.

[0013] In some embodiments, a width L of the first region along the second direction satisfies: 10 mm ≤ L ≤ 30 mm.

[0014] In some embodiments, the first region and the second region are flush with each other at a side facing away from the battery cell, and a side of the first region facing the battery cell is protruding beyond a side of the second region facing the battery cell.

[0015] In some embodiments, the first area surrounds the second area.

[0016] In some embodiments, a thickness H1 of the first region along the first direction satisfies: 1 mm≤H1≤6 mm.

[0017] In some embodiments, a thickness H1 of the first region along the first direction satisfies: 1 mm ≤ H1 ≤ 2 mm.

[0018] In some embodiments, a thickness H2 of the second region along the first direction satisfies: 0.5 mm≤H2≤3 mm.

[0019] In some embodiments, a thickness H1 of the first region along the first direction and a thickness H2 of the second region along the first direction satisfy: 1

[0020] In some embodiments, a sealant is filled between the first region and the frame.

[0021] In some embodiments, the mounting plate is a bottom plate of the box along the first direction.

[0022] In some embodiments, the mounting plate is a steel plate.

[0023] In a second aspect, an embodiment of the present application provides an electrical device, comprising: a battery device as described in any one of the above items, wherein the battery device is used to store or provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of an energy storage system provided in some embodiments of the present application;

[0026] Figure 2 A schematic diagram of the structure of a charging network provided in some embodiments of the present application;​

[0027] Figure 3 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0028] Figure 4 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0029] Figure 5 One of the structural schematic diagrams of the battery device provided in some embodiments of the present application;

[0030] Figure 6 A second structural schematic diagram of a battery device provided in some embodiments of the present application;

[0031] Figure 7 for Figure 5 Sectional view of AA in the middle;

[0032] Figure 8 for Figure 6 Cross-sectional view of the middle BB;

[0033] Fig. 9 for Figure 8 A partial enlarged view of point C in the middle.

[0034] Reference numerals:

[0035] Energy storage device 1, power conversion device 2, power generation equipment 3, charging pile 4, connector 5;

[0036] Vehicles 1000;

[0037] Battery device 100;

[0038] Box body 10, first box body 11, second box body 12, mounting plate 13, first area 131, first part 1311, second part 1312, second area 132, frame 14, frame body 141, mounting beam 142, sealing member 15;

[0039] Battery cell 20;

[0040] Controller 200; Motor 300. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0043] Reference to "embodiments" in this application 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 in this application may be combined with other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0046] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0047] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0048] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0049] The battery cell can be cylindrical, flat, rectangular or other shapes, and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the present application embodiment does not limit this.

[0050] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode collector includes a positive electrode collector body and a positive electrode ear. The positive electrode active material layer is coated on the surface of the positive electrode collector body. The positive electrode ear is not coated with the positive electrode active material layer and protrudes from the positive electrode collector body. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode collector includes a negative electrode collector body and a negative electrode ear. The negative electrode active material layer is coated on the surface of the negative electrode collector body. The negative electrode ear is not coated with the negative electrode active material layer and protrudes from the negative electrode collector body. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current is passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0051] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0052] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery cells are used to store or provide electrical energy.

[0053] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0054] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0055] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0056] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0057] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0058] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0059] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0060] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0061] In the related art, the bottom plate structure of the battery device is unreasonable, and there are problems such as insufficient local structural strength or excessive overall weight, which need to be improved.

[0062] Based on the above considerations, in order to optimize the bottom plate structure of the battery device, a battery device is designed, including a battery cell and a box body, the box body includes a mounting plate and a frame, the mounting plate and the frame form a cavity for accommodating the battery cell; wherein, the mounting plate includes a first area and a second area located inside the first area, at least a portion of the first area is connected to the frame, and a thickness H1 of the first area along a first direction Z and a thickness H2 of the second area along the first direction Z satisfy: H1>H2.

[0063] In a battery device of this structure, by optimizing the structure of the mounting plate and specifically setting the first area of ​​the mounting plate connected to the frame as a relatively thick area, the strength of the first area can be enhanced to meet the strength requirement for the connection between the mounting plate and the frame; the mounting plate is set to a relatively thin area near the middle area to meet the weight requirement of the mounting plate and reduce the risk of excessive weight of the mounting plate.

[0064] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0065] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery devices are used to store or provide electrical energy.

[0066] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0067] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption and provide electrical energy to relevant users or electrical devices during peak electricity consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0068] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0069] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0070] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0071] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0072] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (SBMU), a fusion switch and other modules.

[0073] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module and other modules.

[0074] As an example, the fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0075] As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0076] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0077] In some embodiments, Figure 1 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter 2 (Power Converter System, PCS for short), and the power converter 2 is used to be connected between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electric energy, and the electric energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. Among them, the specific type of the power generation device 3 is not limited in this application.

[0078] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage systems, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0079] Please refer to Figure 2The embodiment of the present application provides a charging network, including a charging pile 4 and an energy storage device 1, wherein the charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electric energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device in the energy storage device 1 through a cable, and the battery device can provide its stored electric energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to an electric device (such as a vehicle) so as to replenish energy to the electric device.

[0080] The energy storage device can be located inside the charging pile (such as an integrated storage and charging machine) or outside the charging pile.

[0081] The embodiment of the present application provides an electric device using a battery cell or a battery device or an energy storage device or an energy storage system as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, and a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0082] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0083] Please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and 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, and 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 a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0084] In some embodiments of the present application, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0085] Please refer to Figure 4 , Figure 4The structural exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a plurality of battery cells 20, and the battery cells 20 are used to be accommodated in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery cells 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cells 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0086] In the battery device 100, multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 20 are connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 20.

[0087] Please refer to Figure 4 , Figure 4 A partial structural diagram of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes multiple rows of battery cells 20, and the multiple rows of battery cells 20 are arranged along a first direction Z, and each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction Y. The first direction Z and the second direction Y are respectively the length direction of the box body 10 and the width direction of the box body 10, and the first direction Z and the second direction Y are perpendicular to each other.

[0088] According to some embodiments of the present application, referring to Figure 5-Figure 9 , the present application provides a battery device 100 .

[0089] like Figure 4 , Figure 5 and Figure 6As shown, the battery device 100 includes: a battery cell 20 and a box body 10 ; the box body 10 includes a mounting plate 13 and a frame 14 , and the mounting plate 13 and the frame 14 form a cavity for accommodating the battery cell 20 .

[0090] Among them, Fig. 9 As shown, the mounting plate 13 includes a first area 131 and a second area 132 located inside the first area 131. At least a portion of the first area 131 is connected to the frame 14. The thickness H1 of the first area 131 along the first direction Z and the thickness H2 of the second area 132 along the first direction Z satisfy: H1>H2.

[0091] The thickness H1 of the first region 131 along the first direction Z is greater than the thickness H2 of the second region 132 along the first direction Z, so that the strength of the first region 131 is greater than the strength of the second region 132 .

[0092] Exemplarily, the mounting plate 13 is a plate of unequal thickness, and the mounting plate 13 can be made of laser-welded plates of unequal thickness or variable-section rolled plates of unequal thickness.

[0093] Exemplarily, the mounting plate 13 is made of steel, preferably a high-strength thermoformed material.

[0094] In some embodiments, the mounting plate 13 is a steel plate to meet the strength requirements of the mounting plate 13 .

[0095] Exemplarily, the mounting plate 13 may be a bottom plate of the box body 10 along the first direction Z, so as to enhance the structural strength of the bottom plate and enhance the stability of the connection between the bottom edge and the frame 14 .

[0096] Among them, Fig. 9 As shown, at least a portion of the first region 131 is connected to the frame 14 , and the first region 131 may be connected to the frame 14 by welding or gluing.

[0097] The first region 131 completely overlaps with the frame 14 along the first direction Z, or the first region 131 partially overlaps with the frame 14 along the first direction Z.

[0098] In the related art, when the mounting plate 13 is too thin, the local strength of the connection area between the mounting plate 13 and the frame 14 is insufficient; when the mounting plate 13 is too thick, the mounting plate 13 is too heavy, which affects the lightweight development of the battery device 100.

[0099] According to the battery device 100 provided in the present application, by optimizing the structure of the mounting plate 13, the first area 131 of the mounting plate 13 connected to the frame 14 is specifically set as a relatively thick area, which can enhance the strength of the first area 131 and meet the strength requirement of the mounting plate 13 connected to the frame 14; the mounting plate 13 is set as a relatively thin area near the middle area, which can meet the weight requirement of the mounting plate 13 and reduce the risk of excessive weight of the mounting plate 13.

[0100] The distribution modes of the first area 131 and the second area 132 include at least the following two types.

[0101] First, if Figure 7 and Figure 8 As shown, the first area 131 is disposed on both sides of the second area 132 along the second direction Y.

[0102] The frame 14 includes a frame body 141 and a mounting beam 142 . The mounting beam 142 is disposed on both sides of the frame body 141 along the second direction Y. At least a portion of the first area 131 is connected to the mounting beam 142 .

[0103] The first region 131 is connected to the mounting beam 142 , and the first region 131 may be connected to the mounting beam 142 by welding or gluing.

[0104] Exemplarily, the first region 131 completely overlaps with the mounting beam 142 along the first direction Z, or the first region 131 partially overlaps with the mounting beam 142 along the first direction Z.

[0105] In this embodiment, the first area 131 is arranged on both sides of the second area 132 along the second direction Y, that is, the mounting plate 13 is a variable cross-section structure in a single direction, which can reduce the processing difficulty and meet the strength requirements of the connection between the mounting plate 13 and the mounting beam 142.

[0106] In which, when the first area 131 is only connected to the mounting beam 142 of the frame 14, the mounting beam 142 is distributed at intervals along the second direction Y, the first area 131 is located on both sides of the second area 132 along the second direction Y, and the side of the first area 131 facing the battery cell 20 protrudes beyond the side of the second area 132 facing the battery cell 20.

[0107] Second, if Figure 5 and Fig. 9 As shown, the first area 131 surrounds the outer side of the second area 132 .

[0108] The first area 131 is connected to the entire frame, and the first area 131 is respectively connected to the frame body 141 and the mounting beam 142 , which can simultaneously meet the strength and weight requirements of the mounting plate 13 .

[0109] Among them, when the first area 131 is connected to the frame body 141 and the mounting beam 142, the first area 131 is located outside the second area 132 along the circumference of the second area 132, and the part of the first area 131 connected to the mounting beam 142 is thickened, and the part of the first area 131 connected to the frame body 141 is also thickened.

[0110] Exemplarily, the thickness of the portion of the first region 131 connected to the mounting beam 142 along the first direction Z may be greater than or equal to the thickness of the portion of the first region 131 connected to the frame body 141 along the first direction Z.

[0111] According to some embodiments of the present application, referring to Fig. 9 The first region 131 includes a first portion 1311 and a second portion 1312 that are connected. The first portion 1311 overlaps and is connected to the frame 14 along the first direction Z, and the second portion 1312 is connected to the second region 132 .

[0112] The first area 131 protrudes from the second portion 1312 of the frame 14 to increase the stability of the connection between the mounting plate 13 and the frame 14 .

[0113] The first portion 1311 is sealed and connected to the upper surface of the frame 14 along the first direction Z, which not only increases the supporting effect of the frame 14 on the first portion 1311, but also allows a seal to be provided in the overlapping area to increase the sealing of the box.

[0114] Exemplarily, when the first area 131 is only connected to the mounting beam 142 of the frame 14, the first part 1311, the second part 1312 and the second area 132 are distributed in sequence along the second direction Y, the first part 1311 coincides with the mounting beam 142 along the first direction Z, and the second part 1312 protrudes from the mounting beam 142 along the second direction Y, that is, the first part 1311 has a part protruding from the mounting beam 142 along the second direction Y, so as to reduce the difficulty of assembling the first area 131 and the mounting beam 142 of the frame 14.

[0115] Exemplarily, when the first region 131 is connected to the frame 14 , the first portion 1311 , the second portion 1312 , and the second region 132 are sequentially distributed from the outside to the inside.

[0116] According to some embodiments of the present application, with the second direction Y as the projection direction, the projection of the first area 131 and the projection of the mounting beam 142 have an overlapping area.

[0117] According to some embodiments of the present application, referring to Fig. 9 , a width L of the first area 131 along the second direction Y satisfies: 10 mm≤L≤100 mm.

[0118] Exemplarily, the width L of the first region 131 along the second direction Y may be 10 mm, 23 mm, 33 mm, 46 mm, 55 mm, 76 mm, 90 mm or 100 mm.

[0119] Preferably, a width L of the first region 131 along the second direction Y satisfies: 10 mm≤L≤30 mm.

[0120] Exemplarily, the width L of the first region 131 along the second direction Y may be 12 mm, 18 mm, 20 mm, 25 mm or 30 mm.

[0121] In which, when the first area 131 is only connected to the mounting beam 142 of the frame 14, the width L of the first area 131 along the second direction Y is greater than or equal to the width of the mounting beam 142 along the second direction Y to improve the stability of the connection between the mounting plate 13 and the mounting beam 142.

[0122] When the first area 131 is connected to the frame 14 , the width of the first area 131 is greater than or equal to the width of the frame 14 , so as to improve the stability of the connection between the mounting plate 13 and the frame 14 .

[0123] According to some embodiments of the present application, referring to Fig. 9 The first region 131 and the second region 132 are flush with the side facing away from the battery cell 20 , and the side of the first region 131 facing the battery cell 20 protrudes beyond the side of the second region 132 facing the battery cell 20 .

[0124] In this embodiment, the mounting plate 13 is thickened in the direction toward the battery cell 20 , and the first region 131 and the second region 132 are flush with the side facing away from the battery cell 20 , thereby facilitating assembly of the mounting plate 13 with the frame 14 .

[0125] Exemplarily, when the first region 131 is connected only to the mounting beam 142 of the frame 14 , the side of the first region 131 facing the battery cell 20 protrudes beyond the side of the second region 132 facing the battery cell 20 .

[0126] For example, when the first region 131 is connected to both the frame body 141 and the mounting beam 142, the portion of the first region 131 connected to the mounting beam 142 is thickened, and the portion of the first region 131 connected to the frame body 141 is also thickened. The thickness of the portion of the first region 131 connected to the mounting beam 142 along the first direction Z may be greater than or equal to the thickness of the portion of the first region 131 connected to the frame body 141 along the first direction Z.

[0127] In which, the side of the battery cell 20 facing the portion of the first area 131 connected to the mounting beam 142 can protrude outward from the side of the battery cell 20 facing the second area 132, and / or the side of the battery cell 20 facing the portion of the first area 131 connected to the frame body 141 can protrude outward from the side of the battery cell 20 facing the second area 132.

[0128] According to some embodiments of the present application, referring to Fig. 9 , a thickness H1 of the first region 131 along the first direction Z satisfies: 1 mm ≤ H1 ≤ 6 mm.

[0129] Exemplarily, the thickness H1 of the first region 131 along the first direction Z may be 1 mm, 2 mm, 2.5 mm, 4 mm or 6 mm.

[0130] Preferably, a thickness H1 of the first region 131 along the first direction Z satisfies: 1 mm≤H1≤2 mm.

[0131] Exemplarily, the thickness H1 of the first region 131 along the first direction Z may be 1 mm, 1.2 mm, 1.8 mm or 2 mm.

[0132] In this embodiment, by setting the range of the thickness H1 of the first region 131 along the first direction Z, the strength requirement of the mounting plate 13 can be met and the influence of the thickening setting on the weight of the mounting plate 13 can be reduced.

[0133] According to some embodiments of the present application, referring to Fig. 9 , a thickness H2 of the second region 132 along the first direction Z satisfies: 0.5 mm ≤ H2 ≤ 3 mm.

[0134] In this embodiment, exemplarily, the thickness H2 of the second region 132 along the first direction Z may be 0.5 mm, 1 mm, 2.5 mm or 3 mm.

[0135] Preferably, a thickness H2 of the second region 132 along the first direction Z satisfies: 0.8 mm≤H2≤1.2 mm.

[0136] In this embodiment, exemplarily, the thickness H2 of the second region 132 along the first direction Z may be 0.8 mm, 1 mm, 1.1 mm or 1.2 mm.

[0137] In this embodiment, by setting the range of the thickness H2 of the second region 132 along the first direction Z, the strength requirement of the mounting plate 13 can be met and the influence of the thickening setting on the weight of the mounting plate 13 can be reduced.

[0138] According to some embodiments of the present application, referring to Fig. 9, a thickness H1 of the first region 131 along the first direction Z and a thickness H2 of the second region 132 along the first direction Z satisfy: 1

[0139] In this embodiment, H1 / H2 can be 1.2, 1.4, 2, 2.5 or 3.

[0140] In this embodiment, by setting the ratio of the thickness H1 of the first area 131 along the first direction Z to the thickness H2 of the second area 132 along the first direction Z, the strength of the mounting plate 13 can be balanced, stress concentration can be reduced, and the impact of the thickening setting on the weight of the mounting plate 13 can be reduced.

[0141] According to some embodiments of the present application, referring to Fig. 9 A sealing member 15 is filled between the first area 131 and the frame 14 to form a seal between the first area 131 and the frame 14 , thereby improving the sealing performance of the box body 10 .

[0142] Exemplarily, the sealing member 15 may be a structure such as a sealant, a rubber strip or a rubber ring.

[0143] According to some embodiments of the present application, referring to Fig. 9 The first area 131 is provided with a mounting groove, the notch of the mounting groove faces the frame 14 , the mounting groove is filled with sealant, and the fastener passes through the frame 14 and is connected to the first area 131 through the sealant.

[0144] Exemplarily, the fastener may be a bolt fastening structure.

[0145] According to some embodiments of the present application, the present application also provides an energy storage device 1, which includes a plurality of battery cells 20 of any of the above schemes, and the battery cells 20 are used to store or provide electrical energy; or the energy storage device 1 includes a plurality of battery devices 100 of any of the above schemes, and the battery devices 100 are used to store or provide electrical energy.

[0146] According to some embodiments of the present application, the present application also provides an energy storage system, which includes: a power conversion device 2 and an energy storage device 1 of any of the above schemes, and the power conversion device 2 is used to electrically connect the power generation equipment 3 and the energy storage device 1.

[0147] ​According to some embodiments of the present application, the present application further provides an electric device. The electric device includes a battery cell 20 of any of the above solutions, and the battery cell 20 is used to store or provide electric energy; or the electric device includes a battery device 100 of any of the above solutions, and the battery device 100 is used to store or provide electric energy; or the electric device includes an energy storage device 1 of any of the above solutions, and the battery cell 20 or the battery device 100 is used to store or provide electric energy; or the electric device includes an energy storage system of any of the above solutions, and the battery cell 20 or the battery device 100 is used to store or provide electric energy.

[0148] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 .

[0149] According to some embodiments of the present application, the present application also provides a charging network, which includes a charging pile 4 and an energy storage device 1 of any of the above schemes or an energy storage system of any of the above schemes, and the energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0150] The energy storage device 1 may be located inside the charging pile 4 (eg, an integrated storage and charging device), or may be located outside the charging pile 4 .

[0151] According to some embodiments of the present application, see Figure 5-Figure 9 As shown, the present application provides a battery device 100, which includes: a battery cell 20 and a box body 10; the box body 10 includes a mounting plate 13 and a frame 14, and the mounting plate 13 and the frame 14 form a cavity for accommodating the battery cell 20; wherein the mounting plate 13 includes a first area 131 and a second area 132 located inside the first area 131, at least a portion of the first area 131 is connected to the frame 14, and a thickness H1 of the first area 131 along a first direction Z and a thickness H2 of the second area 132 along the first direction Z satisfy: H1>H2.

[0152] Exemplarily, the first area 131 is disposed on both sides of the second area 132 along the second direction Y to be connected to the mounting beam 142 of the frame 14 ; or, the first area 131 surrounds the outer side of the second area 132 to be connected to the frame 14 .

[0153] According to the battery device 100 provided in the present application, by optimizing the structure of the mounting plate 13, the first area 131 of the mounting plate 13 connected to the frame 14 is specifically set as a relatively thick area, which can enhance the strength of the first area 131 and meet the strength requirement of the mounting plate 13 connected to the frame 14; the mounting plate 13 is set as a relatively thin area near the middle area, which can meet the weight requirement of the mounting plate 13 and reduce the risk of excessive weight of the mounting plate 13.

[0154] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0155] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0156] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, comprising a mounting plate and a frame, wherein the mounting plate and the frame form a cavity for accommodating the battery cell; The mounting plate includes a first area and a second area located inside the first area, at least part of the first area is connected to the frame, and a thickness H1 of the first area along a first direction and a thickness H2 of the second area along the first direction satisfy: H1>H2.

2. The battery device according to claim 1, characterized in that: The first area is disposed on both sides of the second area along the second direction; The frame includes a frame body and a mounting beam, wherein the mounting beam is disposed on both sides of the frame body along a second direction; at least a portion of the first area is connected to the mounting beam.

3. The battery device according to claim 2, characterized in that: A width L of the first region along the second direction satisfies: 10 mm ≤ L ≤ 100 mm.

4. The battery device according to claim 2, characterized in that: A width L of the first region along the second direction satisfies: 10 mm ≤ L ≤ 30 mm.

5. The battery device according to claim 1, characterized in that: The first area surrounds the outer side of the second area.

6. The battery device according to claim 1, characterized in that: The first region includes a first portion and a second portion that are connected, the first portion overlaps and is connected to the frame along the first direction, and the second portion is connected to the second region.

7. The battery device according to claim 1, characterized in that: The first region and the second region are flush with each other at the side facing away from the battery cell, and the side of the first region facing the battery cell is protruding beyond the side of the second region facing the battery cell.

8. The battery device according to any one of claims 1 to 7, characterized in that: A thickness H1 of the first region along the first direction satisfies: 1 mm ≤ H1 ≤ 6 mm.

9. The battery device according to any one of claims 1 to 7, characterized in that: A thickness H1 of the first region along the first direction satisfies: 1 mm ≤ H1 ≤ 2 mm.

10. The battery device according to any one of claims 1 to 7, characterized in that: A thickness H2 of the second region along the first direction satisfies: 0.5 mm ≤ H2 ≤ 3 mm.

11. The battery device according to any one of claims 1 to 7, characterized in that: A thickness H1 of the first region along the first direction and a thickness H2 of the second region along the first direction satisfy: 1<H1 / H2≤3.

12. The battery device according to any one of claims 1 to 7, characterized in that: A sealing member is filled between the first area and the frame.

13. The battery device according to any one of claims 1 to 7, characterized in that: The mounting plate is a bottom plate of the box along the first direction.

14. The battery device according to any one of claims 1 to 7, characterized in that: The mounting plate is a steel plate.

15. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 14, wherein the battery device is used to store or provide electrical energy.

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