Battery device, energy storage device and power utilization device

Abstract

The utility model discloses a battery device, an energy storage device and a power utilization device and belongs to the field of batteries. The battery device comprises: a box body, wherein the box body is provided with an accommodating cavity for accommodating a battery monomer assembly; the mounting beam is arranged in the accommodating cavity and is used for mounting the battery monomer assembly, a groove is defined by the mounting beam, and part of the box body is arranged at a notch of the groove so as to define a mounting cavity; the reinforcing part is located in the mounting cavity, and the reinforcing part is at least connected with the mounting beam and used for reinforcing the strength of the mounting beam. According to the technical scheme, the reinforcing piece is arranged in the mounting cavity between the mounting beam and the box body, and the reinforcing piece is at least connected with the mounting beam to reinforce the strength of the mounting beam, so that the bearing capacity of the mounting beam can be improved, the mounting beam and the box body are not easy to deform or damage, and the battery monomer assembly is more stably mounted; and the overall structural strength of the battery device is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery device, an energy storage device and an electricity-using device. Background Art

[0002] In the related art, the battery cell assembly is installed and fixed in the battery box by means of mounting beams. However, the fixing structure of the battery cell assembly is unstable. When the expansion force of the battery cell is large or is acted upon by external forces, the fixing structure is easily deformed or damaged, and even the box is damaged. Utility Model Content

[0003] The embodiments of the utility model provide a battery device, an energy storage device and an electric device, and the structural strength of the battery device and the structural strength of the mounting beam thereof are enhanced.

[0004] In a first aspect, an embodiment of the utility model provides a battery device, comprising: a box body, the box body having a accommodating cavity for accommodating a battery cell assembly; a mounting beam, the mounting beam is disposed in the accommodating cavity and is used to install the battery cell assembly, the mounting beam defines a groove, and a portion of the box body is disposed at a notch of the groove to define the mounting cavity; a reinforcement member, the reinforcement member is located in the mounting cavity, the reinforcement member is connected to at least the mounting beam and is used to strengthen the strength of the mounting beam.

[0005] In the above technical solution, by arranging a reinforcement member in the mounting cavity between the mounting beam and the box body, the reinforcement member is at least connected to the mounting beam to strengthen the strength of the mounting beam, thereby improving the bearing capacity of the mounting beam, making the mounting beam and the box body less likely to be deformed or damaged, and making the installation of the battery cell assembly more stable, thereby enhancing the overall structural strength of the battery device.

[0006] In some embodiments, the groove has a connected groove bottom wall and groove side walls, and the reinforcement member includes a first reinforcement plate and / or a second reinforcement plate, the first reinforcement plate is connected to the groove side wall, and the second reinforcement plate is connected to the groove bottom wall.

[0007] In the above technical solution, the first reinforcing plate is connected to the side wall of the groove, which can play a good structural reinforcement effect on the mounting beam in the direction of the expansion force acting on the mounting beam, so that the mounting beam can better bear the expansion force. The second reinforcing plate is connected to the bottom wall of the groove, so that the second reinforcing plate can thicken the bottom wall of the groove and strengthen the structure to improve the structural stability. In the embodiment including both the first reinforcing member and the second reinforcing member, the first reinforcing member and the second reinforcing member generally form an L-shaped bending structure, and the bending structure has a better effect of resisting the expansion force of the battery cell assembly.

[0008] In some embodiments, the battery cell assembly is arranged on one side of the mounting beam along the first direction and connected to the groove bottom wall, and the groove has two groove side walls opposite to each other along the first direction, wherein the groove side wall away from the battery cell assembly is connected to the first reinforcing plate.

[0009] In the above technical solution, the first reinforcing plate is connected to the side wall of the groove away from the battery cell assembly, so that in the first direction, the first reinforcing member can be located on the side of the connection point of the groove bottom wall away from the battery cell assembly, thereby not easily interfering with the connection between the battery cell assembly and the groove bottom wall, and the structural design is more reasonable.

[0010] In some embodiments, the first reinforcing plate is a plate body that extends continuously along the length direction of the mounting beam, wherein the second reinforcing plate is a plate body that extends continuously along the length direction of the mounting beam; or, the second reinforcing plate includes a plurality of reinforcing segments spaced apart along the length direction of the mounting beam, and the plurality of reinforcing segments are respectively connected to the first reinforcing plate.

[0011] In the above technical solution, the first reinforcing plate extends continuously, so that the first reinforcing plate has a better effect on enhancing the structural strength of the mounting beam, and can play a good and stable fixing effect on the battery monomer components connected to different positions in the length direction of the mounting beam. The second reinforcing plate extends continuously, so that the overall self-strength of the reinforcing member is better, and thus the structural strength of the mounting beam is better; the second reinforcing plate includes multiple reinforcing sections, and the multiple reinforcing sections can play a structural reinforcement role at multiple positions in the length direction of the first reinforcing plate, thereby reducing the amount of plate material used, reducing weight and cost while the reinforcing member and the mounting beam as a whole meet the structural strength requirements.

[0012] In some embodiments, the groove sidewall is provided with a first concave-convex structure, and the first reinforcing plate matches the shape of the groove sidewall; and / or, the groove bottom wall is provided with a second concave-convex structure, and the second reinforcing plate matches the shape of the groove bottom wall.

[0013] In the above technical solution, the reinforcing plate itself can be formed with a concave-convex structure to improve the structural strength of the reinforcing plate and the structural reinforcing effect of the reinforcing plate on the mounting beam, and the connection area between the reinforcing plate and the groove wall can be larger to further enhance the structural reinforcing effect on the mounting beam.

[0014] In some embodiments, the first reinforcing plate is bonded to the side wall of the groove; and the second reinforcing plate is welded to the bottom wall of the groove.

[0015] In the above technical solution, the bonding connection method has lower requirements on the parallelism between the first reinforcing plate and the side wall of the groove, and the welding connection has higher strength and is stronger. By combining bonding and welding, the connection between the reinforcement and the mounting beam is more reliable and the influence of the angle difference can be reduced.

[0016] In some embodiments, the battery cell assembly includes a plurality of battery cells stacked along a first direction, and end plates are respectively provided on both sides of the battery cell assembly along the first direction. There are two mounting beams and they are arranged spaced apart along the first direction. The two end plates are respectively located on one side of the two mounting beams along a second direction and are connected to the mounting beams, and the first direction is perpendicular to the second direction.

[0017] In the above technical solution, by providing the end plate connected to the mounting beam, the two layers of the battery cell assembly in the stacking direction can be effectively limited, and the expansion force of the battery cell assembly can be resisted, thereby improving the fixing stability of the battery cell assembly. In addition, the height of the mounting beam can be reduced, and the structure of the required reinforcement can be simpler.

[0018] In some embodiments, the battery device further includes a connecting member, which passes through the end plate, the mounting beam, and the reinforcement member to connect the end plate, the mounting beam, and the reinforcement member.

[0019] In the above technical solution, the connection between the end plate and the mounting beam and the connection between the mounting beam and the reinforcement are realized through the connecting parts, which saves the number of required connecting parts and simplifies the assembly process. In addition, the end plate, the mounting beam and the reinforcement are connected together, which is more conducive to improving the overall structural strength.

[0020] In some embodiments, the mounting beam defines a groove on one side facing the reinforcement, the groove having a groove bottom wall and groove side walls connected to each other, the groove bottom wall having a first connecting hole, the reinforcement comprising a second reinforcement plate fitted with the groove bottom wall, the second reinforcement plate having a second connecting hole, a connecting fitting is passed through the first connecting hole and the second connecting hole to connect the mounting beam and the reinforcement, and the connecting piece is passed through the end plate and connected to the connecting fitting.

[0021] In the above technical solution, the connecting fitting can realize the pre-fixation of the installation beam and the reinforcement, so that the installation beam and the reinforcement are not easily misaligned during the installation of the connecting fitting, and the connecting fitting can further improve the reinforcement effect of the reinforcement on the installation beam.

[0022] In some embodiments, the bottom wall of the groove is provided with a plurality of first positioning holes, and the second reinforcement plate is provided with a plurality of second positioning holes, and the second positioning holes correspond to and are connected with the first positioning holes one by one, wherein at least one of the first positioning holes and the corresponding second positioning hole are round holes, and at least one of the first positioning holes and the corresponding second positioning hole are waist-round holes.

[0023] In the above technical solution, during the assembly process, the tooling can be inserted into the first positioning hole and the second positioning hole to achieve the positioning of the mounting beam and the reinforcement, so that during the installation of the connecting member, the mounting beam and the connecting member are not easily misplaced and are not easily misplaced relative to the box body. In addition, the rough positioning of the mounting beam and the reinforcement can be achieved through the waist-round hole, and the fine positioning of the mounting beam and the reinforcement can be achieved through the round hole, making the positioning more accurate and easier.

[0024] In a second aspect, an embodiment of the utility model further provides an energy storage device, including the above-mentioned battery device, wherein the battery device is used to store or provide electrical energy.

[0025] In a third aspect, an embodiment of the utility model further provides an electrical device, including the above-mentioned battery device or the above-mentioned energy storage device, wherein the battery device is used to store or provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a vehicle provided by an embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the structure of a battery device provided in an embodiment of the utility model;

[0028] Figure 3 A partial structural schematic diagram of a battery device provided in an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the structure of the mounting beam provided in the embodiment of the utility model;

[0030] Figure 5 A schematic diagram of the matching structure of the mounting beam and the reinforcement member provided in an embodiment of the utility model;

[0031] Figure 6 A schematic structural diagram of a reinforcement member provided by an embodiment of the utility model at an angle;

[0032] Figure 7 for Figure 6 A cross-sectional view along the direction indicated by line AA;

[0033] Figure 8 A schematic structural diagram of a reinforcement member provided by an embodiment of the utility model from another angle;

[0034] Fig. 9A schematic diagram of an energy storage device provided in an embodiment of the utility model.

[0035] Reference numerals:

[0036] Vehicle 1000; Energy storage device 2000;

[0037] Battery device 100; controller 200; motor 300;

[0038] Box body 10; accommodating chamber 101; first box body 11; second box body 12; bottom plate 121;

[0039] Battery cell assembly 20; Battery cell 21;

[0040] Mounting beam 30; groove 301; groove bottom wall 31; groove side wall 32; recess 33;

[0041] Reinforcement member 40; first reinforcement plate 41; second reinforcement plate 42;

[0042] Connecting fitting 50; first connecting hole 511; second connecting hole 512; first positioning hole 521; second positioning hole 522;

[0043] The first direction F1; the second direction F2; the third direction F3. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present invention; the terms used in the present invention and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0046] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", and "attachment" 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 the present invention can be understood according to specific circumstances.

[0048] The term "and / or" in the present invention is only a description of the association relationship of the 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 the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0049] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present invention shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present invention.

[0050] The term “plurality” used in the present invention refers to more than two (including two).

[0051] The battery apparatus mentioned in the embodiment of the present utility model may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, and the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0052] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] In the embodiment of the utility model, 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.

[0061] 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 invention. The battery cell can be cylindrical, rectangular or other shapes, which is not limited in the embodiments of the present invention.

[0062] The battery cell includes a shell component, an electrode component and an electrolyte (in a solid-state battery, it can be a solid electrolyte layer located between the positive and negative electrodes). The electrode component includes at least one electrode assembly. The electrode assembly and the electrolyte are both contained in the shell component. The electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator (this structure can be omitted in a solid-state battery). The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work.

[0063] The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector not coated with the positive electrode active material layer protrudes from the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector not coated with the positive electrode active material layer serves as a positive electrode tab sheet. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc.

[0064] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc.

[0065] The material of the isolation film can be PP, polypropylene or PE, polyethylene, etc. The electrode assembly mentioned in the embodiment of the utility model is a winding or laminated structure.

[0066] The electrode assembly can be a wound structure or a laminated structure. During processing, the positive electrode sheet, the negative electrode sheet and the separator are wound or laminated in sequence to obtain the electrode assembly. In the electrode assembly, a plurality of positive electrode tabs are laminated together and electrically connected to the positive electrode column assembly, and a plurality of negative electrode tabs are laminated together and electrically connected to the negative electrode column assembly.

[0067] The embodiment of the utility model provides an energy storage device, including one or more battery clusters (BatteryCluster) 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 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] As an example, a fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire.

[0074] As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0075] In some battery devices in the related art, mounting beams are provided in the box body, and the mounting beams are used to install the battery cell assembly to limit the position of the battery cell assembly and withstand the expansion force generated during the operation of the battery cell assembly. However, the structural strength of some mounting beams is insufficient, resulting in an unstable fixing structure of the battery cell assembly. When the expansion force is large or impacted by external force, it is easy to cause the structure at the mounting beam to deform or be damaged, and even cause the box body to deform or be damaged.

[0076] In view of this, an embodiment of the utility model provides a battery device, comprising: a box, a mounting beam and a reinforcement. The box has a receiving cavity for receiving a battery cell assembly. The mounting beam is arranged in the receiving cavity and is used to install the battery cell assembly, the mounting beam defines a groove, and part of the box is arranged at the notch of the groove to define the mounting cavity. The reinforcement is located in the mounting cavity, the reinforcement is at least connected to the mounting beam and is used to strengthen the strength of the mounting beam.

[0077] In the battery device of the above-mentioned structure, by arranging a reinforcement member in the mounting cavity between the mounting beam and the box body, the reinforcement member is at least connected to the mounting beam to strengthen the strength of the mounting beam, thereby improving the bearing capacity of the mounting beam, making it less likely for the mounting beam and the box body to be deformed or damaged, and making the installation of the battery cell assembly more stable, thereby enhancing the overall structural strength of the battery device.

[0078] The technical solution described in the embodiment of the utility model is applicable to an electrical device or an energy storage device using a battery device.

[0079] The electrical device 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.; the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.; the electric toy includes 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.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc. The embodiment of the utility model does not impose any special restrictions on the above-mentioned electrical devices.

[0080] The energy storage device can be an energy storage container or an energy storage cabinet. 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 the appropriate time. For example, the energy storage device can store electrical energy when electricity consumption is low, and provide electrical energy to relevant users or electrical devices when electricity consumption is high.

[0081] The technical solution described in the embodiment of the utility model is applicable to an electrical device or an energy storage device using a battery device.

[0082] The electrical device 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.; the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.; the electric toy includes 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.; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc. The embodiment of the utility model does not impose any special restrictions on the above-mentioned electrical devices.

[0083] The energy storage device can be an energy storage container or an energy storage cabinet. 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 the appropriate time. For example, the energy storage device can store electrical energy when electricity consumption is low, and provide electrical energy to relevant users or electrical devices when electricity consumption is high.

[0084] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0085] Please refer to Figure 1 , Figure 1 The schematic diagram of a vehicle 1000 provided in some embodiments of the present invention is provided with a battery device 100, and the battery device 100 can be provided at a position such as the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000.

[0086] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein the controller 200 is used to control the battery device 100 to supply power to the motor 300 , for example, to meet the power requirements of starting, navigating, and driving the vehicle 1000 .

[0087] In some embodiments of the present invention, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0088] Please refer to Figure 2 , Figure 2 This is a schematic structural diagram of a battery device 100 provided in some embodiments of the present invention. The battery device 100 includes a battery cell assembly 20 and a box 10 for accommodating the battery cell assembly 20 .

[0089] The battery cell assembly 20 includes a plurality of battery cells 21. The plurality of battery cells 21 may be stacked or arranged in an array. Figure 2 A plurality of battery cells 21 are stacked and arranged along a first direction F1 to form a battery cell assembly 20 .

[0090] The box 10 may be in various structural forms. In some embodiments, the box 10 may include a first box 11 and a second box 12, the first box 11 and the second box 12 cover each other, and the first box 11 and the second box 12 together define a storage space for accommodating the battery cell assembly 20. For example, referring to Figure 2The first box body 11 and the second box body 12 are both hollow structures with one side open, and the open sides of the first box body 11 and the second box body 12 cover each other. The box body 10 can be in various shapes, such as a cylindrical box body, a rectangular box body, etc.

[0091] Hereinafter, a battery device 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0092] Please refer to Figure 2-Figure 5 , Figure 3 A partial structural schematic diagram of a battery device 100 provided in an embodiment of the present utility model; Figure 4 A schematic diagram of the structure of the mounting beam 30 provided in an embodiment of the utility model; Figure 5 The schematic diagram of the matching structure of the mounting beam 30 and the reinforcing member 40 provided in the embodiment of the utility model. The battery device 100 comprises: a box body 10, a mounting beam 30 and a reinforcing member 40.

[0093] The box body 10 has a receiving cavity 101 for receiving the battery cell assembly 20. The mounting beam 30 is disposed in the receiving cavity 101, and the mounting beam 30 is used to mount the battery cell assembly 20. The mounting beam 30 defines a groove 301, and a portion of the box body 10 is disposed at the notch of the groove 301 to define the mounting cavity, and the reinforcement member 40 is located in the mounting cavity, and the reinforcement member 40 is at least connected to the mounting beam 30 and is used to strengthen the strength of the mounting beam 30.

[0094] One or more battery cell assemblies 20 may be disposed in the accommodation cavity 101. Figure 2 As shown, a battery cell assembly 20 is provided in the accommodating cavity 101; for another example, a plurality of battery cell assemblies 20 are provided in the accommodating cavity 101, and the plurality of battery cell assemblies 20 can be arranged along the length direction of the mounting beam 30 so that the plurality of battery cell assemblies 20 can be connected to the mounting beam 30 respectively.

[0095] The connection structure between the mounting beam 30 and the box body 10 is not limited. Figure 3 In the example shown, the mounting beam 30 is connected to the bottom plate 121 and two side plates of the box body 10, so that the mounting beam 30 has good connection strength with the box body 10, and can play a certain role in strengthening the box body 10, thereby improving the ability of the box body 10 to resist side collisions. Of course, the mounting beam 30 can also be connected only to the bottom plate 121 of the box body 10, which can also achieve the fixing of the mounting beam 30 in the accommodating cavity 101.

[0096] The connection method between the mounting beam 30 and the battery cell assembly 20 can be flexibly set. For example, the battery cell assembly 20 can be arranged on one side of the first direction F1 of the mounting beam 30, and the battery cell assembly 20 is connected to the mounting beam 30 through components such as an end plate; for another example, the battery cell assembly 20 is arranged on one side of the first direction F1 of the mounting beam 30, and the mounting beam 30 abuts against the end surface of one end of the battery cell assembly 20 in the first direction F1; for another example, any battery cell 21 of the battery cell assembly 20 is located on one side of the second direction F2 of the mounting beam 30 and is directly connected to the mounting beam 30, etc. Among them, the first direction F1, the second direction F2 and the length direction of the mounting beam 30 (recorded as the third direction F3) are perpendicular to each other.

[0097] An installation cavity is defined between the mounting beam 30 and the box body 10, that is, a part of the cavity wall surface of the mounting cavity is the surface of the mounting beam 30, and another part of the cavity wall surface is the surface of the box body 10. The mounting beam 30 can protrude from the surface of the box body 10 by a certain height to meet the installation position requirements of the battery cell assembly 20; and the weight of the mounting beam 30 is reduced, and the wall thickness of the mounting beam 30 is reduced, so that the mounting beam 30 is less difficult to form during the production process and is not easy to crack.

[0098] In some embodiments, Figure 3-Figure 5 As shown, the mounting beam 30 defines a groove 301, and part of the box body 10 is disposed at the notch of the groove 301 to define a mounting cavity. In other words, the space in the groove 301 is formed as the space of the mounting cavity, the structure of the box body 10 can be simpler, and the reinforcement member 40 can be located in the groove 301, so as to facilitate the connection between the reinforcement member 40 and the mounting beam 30, and increase the connection area and the transmission of force between the mounting beam 30 and the reinforcement member 40.

[0099] The mounting beam 30 may be made of metal or non-metal materials such as carbon fiber; the reinforcement member 40 may be made of metal or non-metal materials such as carbon fiber.

[0100] The reinforcement member 40 is located in the installation cavity, so that the reinforcement member 40 neither occupies the space in the accommodating cavity 101 for arranging the battery cell assembly 20 nor occupies the space outside the box body 10, which is beneficial to improving the energy density of the battery device 100, reducing the overall occupied space of the battery device 100, and improving space utilization.

[0101] The reinforcement 40 is at least connected to the mounting beam 30 . In other words, the reinforcement 40 may be connected only to the mounting beam 30 , or the reinforcement 40 may be connected to the mounting beam 30 and the box body 10 at the same time, both of which can improve the structural strength of the mounting beam 30 .

[0102] The reinforcement member 40 plays a structural reinforcement role on the mounting beam 30, making the mounting beam 30 have a stronger bearing capacity. For the large expansion force of the battery cell assembly 20 or the external force impact it receives, the mounting beam 30 can provide stable support and fixing, so that the battery cell assembly 20 is not easily displaced or damaged, the mounting beam 30 is not easily deformed or damaged, and the box body 10 connected to the mounting beam 30 is not easily deformed or damaged, thereby increasing the overall structural strength of the battery device 100.

[0103] According to the battery device 100 of the embodiment of the utility model, by arranging a reinforcement member 40 in the installation cavity between the installation beam 30 and the box body 10, the reinforcement member 40 is at least connected to the installation beam 30 to strengthen the strength of the installation beam 30, so that the bearing capacity of the installation beam 30 can be improved, the installation beam 30 and the box body 10 are not easy to be deformed or damaged, and the installation of the battery cell assembly 20 is more stable, and the overall structural strength of the battery device 100 is enhanced.

[0104] In some embodiments, Figure 3-Figure 5 As shown, the groove 301 has a groove bottom wall 31 and a groove side wall 32 connected to each other. Figure 5-Figure 8 As shown, Figure 6 and Figure 8 The schematic diagram of the structure of the mounting beam 30 at different angles provided by the embodiment of the utility model is as follows: Figure 7 for Figure 6 In the cross-sectional view along the AA line, the reinforcement member 40 includes at least one of a first reinforcement plate 41 and a second reinforcement plate 42 . The first reinforcement plate 41 is connected to the groove side wall 32 , and the second reinforcement plate 42 is connected to the groove bottom wall 31 .

[0105] The groove bottom wall 31 of the groove 301 refers to the groove wall opposite to the groove opening of the box body 10; the groove side walls 32 of the groove 301 can be two or more, for example, multiple groove side walls 32 of the groove 301 are connected end to end in sequence to form a groove peripheral wall of the groove 301, and for example Figure 4 and Figure 5 As shown, the groove 301 is a groove that penetrates along the length direction of the mounting beam 30, and the groove 301 has two groove side walls 32 that are opposite to each other along the width direction (such as the first direction F1) of the mounting beam 30. Figure 4 and Figure 5 As shown, the groove 301 has a groove bottom wall 31 and two groove side walls 32 . The groove opening of the groove 301 faces downward, the groove bottom wall 31 is the top groove wall of the groove 301 , the two groove side walls 32 are arranged opposite to each other along the first direction F1 , and the reinforcement member 40 is located between the two groove side walls 32 .

[0106] The reinforcement member 40 may only have the first reinforcement plate 41, or only have the second reinforcement plate 42, or may include both the first reinforcement plate 41 and the second reinforcement plate 42. Of course, in some embodiments, in addition to the first reinforcement plate 41 and the second reinforcement plate 42, the reinforcement member 40 may also include a third reinforcement plate, a fourth reinforcement plate or more reinforcement plates, so that the reinforcement member 40 can form a more diverse structure and have a stronger structural reinforcement effect. For example, in some specific embodiments, the cross-section of the reinforcement member 40 perpendicular to the length direction of the mounting beam 30 may be a straight line, L-shaped, U-shaped, Z-shaped, square-shaped, etc.

[0107] In addition, in the embodiment where there are multiple groove sidewalls 32 and the reinforcement member 40 includes a first reinforcement plate 41 , there may be one or more first reinforcement plates 41 , and the number of first reinforcement plates 41 may be less than or equal to the number of groove sidewalls 32 .

[0108] The first reinforcing plate 41 is connected to the groove side wall 32, and can play a good structural reinforcement effect on the mounting beam 30 in the direction of the expansion force acting on the mounting beam 30 (such as the first direction F1), so that the mounting beam 30 can better bear the expansion force. The second reinforcing plate 42 is connected to the groove bottom wall 31, so that the second reinforcing plate 42 thickens the groove bottom wall 31 and strengthens the structure to improve the structural stability. In the embodiment including both the first reinforcing member 40 and the second reinforcing member 40, the first reinforcing member 40 and the second reinforcing member 40 generally form an L-shaped bending structure, and the bending structure has a better effect of resisting the expansion force of the battery cell assembly 20.

[0109] In an embodiment of the utility model, the connection method between the first reinforcement plate 41 and the groove side wall 32 can be but is not limited to bonding, welding, fastener connection, etc.; the connection method between the second reinforcement 40 and the groove bottom wall 31 can be but is not limited to bonding, welding, fastener connection, etc.

[0110] Among them, due to the influence of factors such as processing accuracy and molding process, there may be differences in the angle between the groove bottom wall 31 and the groove side wall 32, and the angle between the first reinforcing plate 41 and the second reinforcing plate 42. Therefore, in some embodiments, the first reinforcing plate 41 is bonded to the groove side wall 32, and the second reinforcing plate 42 is welded to the groove bottom wall 31. The bonding connection method has lower requirements on the parallelism between the first reinforcing plate 41 and the groove side wall 32, and the strength of the welding connection is higher and stronger. By combining bonding and welding, the connection between the reinforcement 40 and the mounting beam 30 is more reliable, and the influence of the angle difference on the connection can be reduced.

[0111] In some embodiments of the present invention, the battery cell assembly 20 is disposed on one side of the mounting beam 30 along the first direction F1 and connected to the groove bottom wall 31. The groove 301 has two groove side walls 32 opposite to each other along the first direction F1. The groove side wall 32 away from the battery cell assembly 20 is connected to the first reinforcing plate 41.

[0112] The battery cell assembly 20 is disposed on one side of the mounting beam 30 along the first direction F1 and connected to the groove bottom wall 31, so that the expansion force of the battery cell assembly 20 acts on the mounting beam 30 along the first direction F1. The first reinforcing plate 41 is connected to the groove side wall 32, which has a better effect of resisting the expansion force in the first direction F1.

[0113] The connection point between the groove bottom wall 31 and the battery cell assembly 20 is limited by the specifications of the battery cell assembly 20; the spacing between the groove side wall 32 close to the battery cell assembly 20 and the connection point on the groove bottom wall 31 of the two groove side walls 32 of the groove 301 is also limited by the specifications of the battery cell assembly 20. The first reinforcing plate 41 is connected to the groove side wall 32 away from the battery cell assembly 20, so that in the first direction F1, the first reinforcing member 40 can be located on the side of the connection point of the groove bottom wall 31 away from the battery cell assembly 20, so that it is not easy to interfere with the connection between the battery cell assembly 20 and the groove bottom wall 31, and the structural design is more reasonable.

[0114] In some embodiments including the first reinforcing plate 41 and the second reinforcing plate 42, as Figure 5 and Figure 6 As shown, the first reinforcing plate 41 is a plate body that continuously extends along the length direction of the mounting beam 30 , for example, the first reinforcing plate 41 is a plate body that continuously extends along the third direction F3 .

[0115] The second reinforcing plate 42 is a plate body extending continuously along the length direction of the mounting beam 30 ; or, the second reinforcing plate 42 includes a plurality of reinforcing sections spaced apart along the length direction of the mounting beam 30 , and the plurality of reinforcing sections are respectively connected to the first reinforcing plate 41 .

[0116] Here, the continuously extended plate means that the plate is not completely disconnected from one end to the other end of the plate in the length direction of the mounting beam 30, that is, the plate is not divided into multiple sections, but holes, notches and other structures may be provided on the plate according to actual needs.

[0117] The plurality of reinforcing sections spaced apart along the length direction of the mounting beam 30 means that any two reinforcing sections are not directly connected to each other but are indirectly connected together through the first reinforcing plate 41 .

[0118] The first reinforcing plate 41 extends continuously, so that the first reinforcing plate 41 has a better effect on enhancing the structural strength of the mounting beam 30, and can play a good and stable fixing effect on the battery cell assembly 20 connected to different positions in the length direction of the mounting beam 30. The second reinforcing plate 42 extends continuously, so that the overall strength of the reinforcing member 40 is better, and thus the structural strength of the mounting beam 30 is better; the second reinforcing plate 42 includes multiple reinforcing sections, and the multiple reinforcing sections can play a structural reinforcement role at multiple positions in the length direction of the first reinforcing plate 41, thereby reducing the amount of plate material, weight and cost while the reinforcing member 40 and the mounting beam 30 as a whole meet the structural strength requirements.

[0119] According to some embodiments of the present invention, the shapes of the first reinforcing plate 41 and the groove side wall 32 can match, and the shapes of the second reinforcing plate 42 and the groove bottom wall 31 can match, so as to increase the connection area between the two and improve the structural reinforcement effect.

[0120] In some embodiments, the groove sidewall 32 is provided with a first concave-convex structure, and the first reinforcing plate 41 matches the shape of the groove sidewall 32. Figure 4-Figure 6 As shown, the groove bottom wall 31 is provided with a second concavo-convex structure, and the second reinforcing plate 42 matches the shape of the groove bottom wall 31. In some embodiments, the groove side wall 32 is provided with a first concavo-convex structure, the first reinforcing plate 41 matches the shape of the groove side wall 32, and the groove bottom wall 31 is provided with a second concavo-convex structure, and the second reinforcing plate 42 matches the shape of the groove bottom wall 31.

[0121] Taking the second concave-convex structure as an example, the concave-convex structure refers to the surface of the groove bottom wall 31 being non-planar, and may be a flat plate with protrusions or recesses 33; or the groove bottom wall 31 may be deformed as a whole to form corresponding protrusions and recesses 33 on both sides of the thickness direction, that is, at a certain position, one side of the surface in the thickness direction is a protrusion and the other side of the surface is a recess 33, so that the overall structural strength of the groove bottom wall 31 is enhanced.

[0122] Taking the second reinforcing plate 42 as an example, the shape of the second reinforcing plate 42 matches that of the groove bottom wall 31, which means that a protrusion protruding toward the installation cavity is formed on the groove bottom wall 31, and a recess 33 is formed on the second reinforcing plate 42 toward the position of the protrusion, and the protrusion of the groove bottom wall 31 is located in the recess 33 of the second reinforcing plate 42; a recess 33 recessed away from the installation cavity is formed on the groove bottom wall 31, and a protrusion is formed on the second reinforcing plate 42 toward the position of the recess 33, and the protrusion of the second reinforcing plate 42 is located in the recess 33 of the groove bottom wall 31.

[0123] Thus, the second reinforcing plate 42 itself can be formed with a concavo-convex structure to improve the structural strength of the second reinforcing plate 42 and the structural reinforcing effect of the second reinforcing plate 42 on the mounting beam 30, and the connection area between the second reinforcing plate 42 and the groove bottom wall 31 can be larger to further enhance the structural reinforcing effect on the mounting beam 30. Similarly, the first reinforcing plate 41 itself can also be formed with a concavo-convex structure and increase the connection area with the groove side wall 32 to improve the structural strength of the first reinforcing plate 41 and the structural reinforcing effect on the mounting beam 30.

[0124] For example, in Figure 4-Figure 6 In the example shown, the first reinforcing plate 41 and the groove side wall 32 are not provided with a concave-convex structure to reduce the impact on the installation space of the battery cell assembly 20; the groove bottom wall 31 is deformed as a whole to form a concave-convex structure, wherein the position of the recess 33 on the side surface of the groove bottom wall 31 facing the accommodating cavity 101 corresponds to the surface facing the installation cavity and a protrusion is formed thereon, and some surfaces of the groove bottom wall 31 facing the accommodating cavity 101 are convex positions and correspond to the surface facing the installation cavity and a recess 33 is formed thereon, and the second reinforcing plate 42 matches the shape of the groove bottom wall 31 to be connected in surface contact, which greatly improves the overall structural strength.

[0125] According to some embodiments of the present invention, Figure 2 and Figure 3 As shown, the battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction F1, and end plates are respectively provided on both sides of the battery cell assembly 20 along the first direction F1. There are two mounting beams 30 and they are spaced apart along the first direction F1, and the two end plates are respectively located on one side of the two mounting beams 30 along the second direction F2 and connected to the mounting beams 30, and the first direction F1 is perpendicular to the second direction F2.

[0126] by Figure 2 and Figure 3 For example, a plurality of battery cells 21 of a battery cell assembly 20 are stacked in the front-to-back direction, and end plates are respectively provided on the front and rear sides; the front end plate is located above and connected to the front end mounting beam 30, and the rear end plate is located above and connected to the rear end mounting beam 30, so as to fix the two end plates, and the two end plates clamp the plurality of battery cells 21 to limit the battery cell assembly 20, which can limit the expansion force of the battery cell assembly 20 in the front-to-back direction and improve the stability of the battery cell assembly 20.

[0127] By providing an end plate connected to the mounting beam 30, the two layers of the battery cell assembly 20 in the stacking direction can be effectively limited, and the expansion force of the battery cell assembly 20 can be resisted, thereby improving the fixing stability of the battery cell assembly 20. In addition, the height of the mounting beam 30 can be reduced, and the structure of the required reinforcement member 40 can also be simpler.

[0128] In some embodiments, the battery device 100 further includes a connector, which is disposed through the end plate, the mounting beam 30 and the reinforcement 40 to connect the end plate, the mounting beam 30 and the reinforcement 40. The connector may be a fastener such as a bolt or a buckle.

[0129] Through the connecting parts, both the connection between the end plate and the mounting beam 30 and the connection between the mounting beam 30 and the reinforcement 40 are realized, which saves the number of required connecting parts and simplifies the assembly process. In addition, the end plate, the mounting beam 30 and the reinforcement 40 are connected together, which is more conducive to improving the overall structural strength.

[0130] In some specific embodiments, Figure 4-Figure 6 As shown, the side of the mounting beam 30 facing the reinforcement 40 defines a groove 301, and the groove 301 has a groove bottom wall 31 and a groove side wall 32 connected to each other, and the groove bottom wall 31 has a first connection hole 511. The reinforcement 40 includes a second reinforcement plate 42 that fits the groove bottom wall 31, and the second reinforcement plate 42 has a second connection hole 512. The battery device 100 also includes a connecting fitting 50, and the connecting fitting 50 is inserted through the first connection hole 511 of the mounting beam 30 and the second connection hole 512 of the reinforcement 40 to achieve the connection between the mounting beam 30 and the reinforcement 40. The connecting member is inserted through the end plate and connected to the connecting fitting 50. Here, the connecting fitting 50 can be, but is not limited to, a rivet nut or the like.

[0131] Thus, the connecting fitting 50 can realize the pre-fixation of the installation beam 30 and the reinforcement 40, so that the installation beam 30 and the reinforcement 40 are not easily misaligned during the installation of the connecting fitting, and the connecting fitting 50 can further improve the reinforcement effect of the reinforcement 40 on the installation beam 30.

[0132] In some specific embodiments, Figure 4-Figure 6 As shown, the groove bottom wall 31 is provided with a first positioning hole 521, and the second reinforcing plate 42 is provided with a second positioning hole 522, and the second positioning hole 522 corresponds to and communicates with the first positioning hole 521. During the assembly process, a tool can be inserted through the first positioning hole 521 and the second positioning hole 522 to achieve the positioning of the mounting beam 30 and the reinforcing member 40, so that during the installation of the connecting member, the mounting beam 30 and the connecting member are not easily misplaced and are not easily misplaced relative to the box body 10.

[0133] In addition, there may be a plurality of first positioning holes 521, and there may be a plurality of second positioning holes 522, and the plurality of second positioning holes 522 correspond to and are connected with the plurality of first positioning holes 521. Among them, at least one first positioning hole 521 and the corresponding second positioning hole 522 are round holes, and at least one first positioning hole 521 and the corresponding second positioning hole 522 are waist-shaped holes. A round hole refers to a round hole in the cross section of the positioning hole perpendicular to the penetration direction, and a waist-shaped hole refers to a waist-shaped cross section of the positioning hole perpendicular to the penetration direction. The waist-shaped hole can realize the rough positioning of the mounting beam 30 and the reinforcement 40, and the round hole can realize the precise positioning of the mounting beam 30 and the reinforcement 40, so that the positioning accuracy is higher and easier.

[0134] like Fig. 9 As shown, the energy storage device 2000 according to the second embodiment of the utility model includes the battery device 100 according to the first embodiment of the utility model, and the battery device 100 is used to store or provide electrical energy. Therefore, by adopting the above-mentioned battery device 100, it is beneficial to improve the bearing capacity of the mounting beam 30, the mounting beam 30 and the box body 10 are not easily deformed or damaged, and the installation of the battery cell assembly 20 is more stable, and the overall structural strength of the battery device 100 is enhanced.

[0135] like Figure 1 As shown, the electric device according to the third embodiment of the utility model includes the battery device 100 according to the first embodiment of the utility model or the energy storage device 2000 according to the second embodiment, and the battery device 100 is used to store or provide electric energy. Therefore, by adopting the above-mentioned battery device 100 or energy storage device 2000, it is beneficial to improve the bearing capacity of the mounting beam 30, the mounting beam 30 and the box body 10 are not easy to deform or damage, and the installation of the battery monomer assembly 20 is more stable, and the overall structural strength of the battery device 100 is enhanced.

[0136] A battery device 100 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

[0137] like Figure 2-Figure 8 As shown, the battery device 100 according to an embodiment of the utility model includes a box body 10, a battery cell assembly 20, an end plate, a mounting beam 30 and a reinforcement 40. The box body 10 includes a first box body 11 and a second box body 12. The first box body 11 is a cover body, and the second box body 12 has a hollow structure. The cover body is arranged at the top opening of the hollow structure to define a accommodating cavity 101.

[0138] The mounting beam 30 is connected to the bottom plate 121 of the second box body 12, and the end plate is located above the mounting beam 30 and is connected to the mounting beam 30 by bolts; the battery cell assembly 20 is sandwiched between the two end plates. The mounting beam 30 has a groove 301, and the groove 301 has a notch facing downward, and the bottom plate 121 covers the notch to define the mounting cavity. The reinforcement 40 is an L-shaped liner reinforcement structure and includes a first reinforcement plate 41 and a second reinforcement plate 42. The first reinforcement 40 and the second reinforcement 40 are designed to imitate the mounting beam 30. The first reinforcement plate 41 is bonded to the groove side wall 32 of the groove 301 and is located on the side of the second reinforcement plate 42 away from the battery cell assembly 20. The second reinforcement plate 42 is welded to the groove bottom wall 31 of the groove 301, and the rivet nut is passed through the second reinforcement plate 42 and the groove bottom wall 31, and the bolt is threadedly connected to the rivet nut.

[0139] During the assembly process, the reinforcement 40 and the mounting beam 30 can be welded together first, and then the rivet nut can be fixed by riveting, and then the mounting beam 30 and the second box body 12 are welded, and finally the end plate is clamped to the battery cell assembly 20 and connected with the rivet nut by bolts.

[0140] In the above embodiment, the reinforcing member 40 plays a good structural reinforcement role on the mounting beam 30 , and effectively increases the overall structural strength of the battery device 100 .

[0141] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0142] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery device, It is characterized in that include: A box body, the box body having a receiving cavity for receiving a battery cell assembly; A mounting beam, the mounting beam being disposed in the accommodating cavity and used for mounting the battery cell assembly, the mounting beam defining a groove, and a portion of the box body being disposed at a notch of the groove to define a mounting cavity; A reinforcement member is located in the mounting cavity, the reinforcement member is connected to at least the mounting beam and is used to strengthen the strength of the mounting beam.

2. The battery device according to claim 1, It is characterized in that The groove has a groove bottom wall and a groove side wall connected to each other. The reinforcement member includes a first reinforcement plate and / or a second reinforcement plate, wherein the first reinforcement plate is connected to the groove side wall, and the second reinforcement plate is connected to the groove bottom wall.

3. The battery device according to claim 2, It is characterized in that The battery cell assembly is arranged on one side of the mounting beam along the first direction and connected to the groove bottom wall, and the groove has two groove side walls opposite to each other along the first direction, wherein: The first reinforcing plate is connected to the groove side wall away from the battery cell assembly.

4. The battery device according to claim 2, It is characterized in that The first reinforcing plate is a plate body extending continuously along the length direction of the mounting beam, wherein: The second reinforcing plate is a plate body extending continuously along the length direction of the mounting beam; or, the second reinforcing plate includes a plurality of reinforcing sections spaced apart along the length direction of the mounting beam, and the plurality of reinforcing sections are respectively connected to the first reinforcing plate.

5. The battery device according to claim 2, It is characterized in that The groove sidewall is provided with a first concave-convex structure, and the first reinforcing plate matches the shape of the groove sidewall; and / or, The groove bottom wall is provided with a second concave-convex structure, and the second reinforcing plate matches the shape of the groove bottom wall.

6. The battery device according to claim 2, It is characterized in that The first reinforcing plate is bonded to the side wall of the groove; and the second reinforcing plate is welded to the bottom wall of the groove.

7. The battery device according to any one of claims 1 to 6, It is characterized in that The battery cell assembly comprises a plurality of battery cells stacked along a first direction, and end plates are respectively provided on both sides of the battery cell assembly along the first direction. There are two mounting beams which are spaced apart along the first direction. The two end plates are respectively located on one side of the two mounting beams along the second direction and connected to the mounting beams. The first direction is perpendicular to the second direction.

8. The battery device according to claim 7, It is characterized in that The battery device further includes a connecting member, which is penetrated through the end plate, the mounting beam and the reinforcing member to connect the end plate, the mounting beam and the reinforcing member.

9. The battery device according to claim 8, It is characterized in that The mounting beam defines a groove on one side facing the reinforcement member, wherein the groove has a groove bottom wall and a groove side wall connected to each other, and the groove bottom wall has a first connecting hole. The reinforcement member includes a second reinforcement plate that fits with the bottom wall of the groove, the second reinforcement plate has a second connecting hole, a connecting fitting is passed through the first connecting hole and the second connecting hole to connect the mounting beam and the reinforcement member, and the connecting member is passed through the end plate and connected to the connecting fitting.

10. The battery device according to claim 9, It is characterized in that The bottom wall of the groove is provided with a plurality of first positioning holes, and the second reinforcing plate is provided with a plurality of second positioning holes, the second positioning holes correspond to and are connected with the first positioning holes one by one, wherein at least one of the first positioning holes and the corresponding second positioning hole are round holes, and at least one of the first positioning holes and the corresponding second positioning hole are oval holes.

11. An energy storage device, It is characterized in that The invention comprises a battery device as claimed in any one of claims 1 to 10, wherein the battery device is used to store or provide electrical energy.

12. An electrical device, It is characterized in that The invention comprises the battery device according to any one of claims 1 to 10 or the energy storage device according to claim 11, wherein the battery device is used to store or provide electrical energy.

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