Battery box, battery device, energy storage device and electric equipment

Abstract

The application relates to the battery technical field and provides a battery box, a battery device, an energy storage device and a power utilization equipment. The battery box comprises a box body, a cover body and a locking device. The box body has a containing cavity with at least one open end; the cover body comprises a cover plate and a cover rim, the cover rim is connected to the circumferential side of the cover plate, and the cover plate is arranged at the open end of the box body so that the cover rim can be arranged around the box body; the locking device comprises a tensioning piece and a tensioner, the tensioner is arranged on at least one of the box body and the cover body, the tensioning piece is arranged on the cover rim in the circumferential direction, and the tensioner is connected with the tensioning piece so that the tensioning piece can deform the cover rim to be locked on the box body. The cover body is arranged on the box body, the tensioner acts on the tensioning piece, the tensioning piece tightens the cover rim of the cover body, the cover rim is tightly matched with the box body, and the locking strength of the box body and the cover body can be improved. The assembly efficiency of the battery device can be improved without arranging bolts for assembly and fixation, and the cumbersome procedures of separately positioning and installing the bolts can be omitted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery box, a battery device, an energy storage device and a power consumption device. BACKGROUND

[0002] In the related art, the box body and the cover body of the battery box need to be fastened and connected, which is usually assembled by bolts. However, the use of bolts for assembly is complicated and results in low assembly efficiency. SUMMARY

[0003] Therefore, the embodiments of the present application aim to provide a battery box, a battery device, an energy storage device and a power consumption device, which can improve the assembly efficiency of the battery device.

[0004] The embodiments of the present application provide a battery box, which comprises:

[0005] a box body having an accommodating cavity with at least one open end;

[0006] a cover body comprising a cover plate and a cover rim, the cover rim being connected to the peripheral side of the cover plate, and the cover plate being arranged at the open end of the box body so that the cover rim can be arranged around the box body;

[0007] a locking device comprising a tensioning member and a tensioner, the tensioner being arranged in at least one of the box body and the cover body, the tensioning member being arranged in the circumferential direction of the cover rim, and the tensioner being connected to the tensioning member so that the tensioning member can deform the cover rim to be locked to the box body.

[0008] In this way, the box body has at least one open end, and the cover body is arranged at the open end of the box body. The tensioner acts on the tensioning member so that the tensioning member tightens the cover rim of the cover body. The cover rim is tightly matched with the box body, which can improve the locking strength of the box body and the cover body. In the embodiments of the present application, the tensioner is operated to realize fixation without the need to arrange bolts for assembly, which can save the cumbersome process of separately positioning and installing each bolt, improve the assembly efficiency of the battery device, and facilitate the disassembly of the cover body from the box body during maintenance.

[0009] In some embodiments, the tensioning member is embedded in the cover rim, and the tensioning member can move relative to the cover rim in the extension direction of the tensioning member.

[0010] In this way, the cover rim can protect and limit the tensioning member to prevent the tensioning member from being worn out due to long-time contact with other structures, resulting in structural damage, and to prevent the tensioning member from being shaken off due to impact.

[0011] In some embodiments, the cover rim comprises:

[0012] an edge portion connected to the peripheral side of the cover plate;

[0013] The flanging portion is connected to the edge portion to form a containing cavity with the edge portion, and the tensioning member is located in the containing cavity.

[0014] In this way, the flanging portion can fix and limit the tensioning member, so that the tensioning member can move in the containing cavity when the tensioner acts on the tensioning member, reducing the possibility of the tensioning member moving out of the cover edge.

[0015] In some embodiments, the flanging portion is flanged inward along the edge portion to form the containing cavity.

[0016] The battery box further comprises a sealing member, and a bottom of the sealing member abuts against the flanging portion. In this way, the flanging portion can support and limit the sealing member, reducing the possibility of the sealing member falling off.

[0017] In some embodiments, the flanging portion is flanged outward along the edge portion to form the containing cavity.

[0018] In this way, the flanging portion does not occupy the space inside the edge portion.

[0019] In some embodiments, the tensioning member is arranged outside the cover edge.

[0020] In some embodiments, the tensioner is a mechanical tensioner.

[0021] The mechanical tensioner has low cost and simple structure, and is easy to maintain later.

[0022] In some embodiments, the tensioner is an intelligent control tensioner.

[0023] The intelligent control tensioner can improve the control efficiency and control accuracy of the tensioning force, and can improve the consistency of the cover edge tensioning force in different batches of production.

[0024] In some embodiments, the number of tensioners is one.

[0025] This can reduce the assembly difficulty and reduce the production cost.

[0026] In some embodiments, the number of tensioners is at least two, and the at least two tensioners are arranged at intervals on the cover body.

[0027] In this way, the tensioning effect on the tensioning member can be improved.

[0028] In some embodiments, the tensioner is located outside the cover edge.

[0029] In this way, the assembly difficulty of the tensioner can be reduced, and the space inside the cover edge will not be occupied.

[0030] In some embodiments, the tensioner is located inside the cover edge.

[0031] In this way, the cover rim can protect the tensioner from being worn out due to long-time contact with the structure outside the cover rim, so as to avoid damage to the structure.

[0032] In some embodiments, the tensioning member is configured as a tensioning wire.

[0033] In this way, the space occupied by the tensioning member can be reduced.

[0034] In some embodiments, the tensioning member is configured as a tensioning sheet.

[0035] In this way, the area of the force applied to the cover rim can be increased.

[0036] In some embodiments, the material of the cover rim is a metal material, a plastic material, or a composite material of metal and plastic.

[0037] In this way, the cover rim can be slightly deformed under the action of the tensioning member, so that the cover rim can be locked to the box body.

[0038] In some embodiments, the material of the tensioning member is a metal material or a polymer material.

[0039] In this way, the structural strength of the tensioning member can be improved.

[0040] In some embodiments, the battery box further comprises:

[0041] A sealing member is located between the box body and the cover body to seal the accommodation cavity.

[0042] In this way, the cover body is arranged on the box body, and the sealing member can be deformed to seal.

[0043] In some embodiments, the sealing member is a sealing gasket, and the sealing gasket comprises:

[0044] A ring gasket is arranged between the flange surface of the box body and the cover plate;

[0045] A gasket rim is connected with the ring gasket and surrounds the side wall of the box body and is located between the cover rim and the side wall of the box body.

[0046] In this way, the ring gasket is deformed by being pressed between the flange surface of the box body and the cover plate, and the gasket rim is deformed by being pressed between the cover rim and the side wall of the box body, so as to seal.

[0047] In some embodiments, the extension length of the gasket rim is less than the distance between the tensioning member and the cover plate, so that the tensioning member can tighten the cover rim to the box body.

[0048] In this way, the tensioning member is below the gasket, and the cover rim is at least partially in direct contact with the box body, so that the cover rim is pulled tightly to the box body to achieve a tightly sealed connection.

[0049] In some embodiments, the gasket has an extension length greater than the distance between the tensioning member and the cover plate, so that the tensioning member can pull the cover rim and the gasket tightly to the box body.

[0050] In this way, the tensioning member is above the bottom of the gasket, and the part of the cover rim pulled tightly is in direct contact with the gasket, so that the gasket is pressed by the force of the tensioning member to achieve a sealing effect between the cover rim and the box body.

[0051] The battery device provided in the embodiments of the present application comprises:

[0052] The battery device provided in any one of the embodiments of the present application;

[0053] The battery monomer is arranged in the accommodating cavity.

[0054] The energy storage device provided in the embodiments of the present application comprises:

[0055] The battery device provided in the embodiments of the present application is used for storing or providing electric energy.

[0056] The electric device provided in the embodiments of the present application comprises:

[0057] The battery device provided in the embodiments of the present application is used for storing or providing electric energy.

[0058] The battery device, the energy storage device and the electric device provided in the embodiments of the present application can improve the locking strength of the box body and the cover body, and can improve the assembly efficiency of the battery device. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 FIG. 1 is a structural schematic diagram of an electric device in an embodiment of the present application;

[0060] Figure 2 FIG. 2 is an exploded structural schematic diagram of a battery device in a first embodiment of the present application;

[0061] Figure 3 FIG. 3 is another exploded structural schematic diagram of the battery device shown in FIG. 2; Figure 2 FIG. 4 is an exploded structural schematic diagram of a battery device in a second embodiment of the present application;

[0062] Figure 4 FIG. 5 is another exploded structural schematic diagram of the battery device shown in FIG. 4; and Figure 2A-A sectional view of the battery device shown in FIG. 1;

[0063] Figure 5 A-A sectional view of the battery device shown in FIG. 1; Figure 4 A-A sectional view of the battery device shown in FIG. 1;

[0064] Figure 6 A-A sectional view of the battery device shown in FIG. 1; Figure 5 A-A sectional view of the battery device shown in FIG. 1;

[0065] Figure 7 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0066] A-A sectional view of the battery device shown in FIG. 1; Figure 8 A-A sectional view of the battery device shown in FIG. 1; Figure 7 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0067] A-A sectional view of the battery device shown in FIG. 1; Figure 9 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0068] A-A sectional view of the battery device shown in FIG. 1; Figure 10 A-A sectional view of the battery device shown in FIG. 1; Figure 9 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0069] A-A sectional view of the battery device shown in FIG. 1; Figure 11 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0070] A-A sectional view of the battery device shown in FIG. 1; Figure 12 A-A sectional view of the battery device shown in FIG. 1; Figure 11 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0071] A-A sectional view of the battery device shown in FIG. 1; Figure 13 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0072] A-A sectional view of the battery device shown in FIG. 1; Figure 14 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0073] A-A sectional view of the battery device shown in FIG. 1; Figure 15 A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0074] A-A sectional view of the battery device shown in FIG. 1; A-A sectional view of the battery device shown in FIG. 1;

[0075] 100, battery box; 10, box body; 10a, accommodating cavity; 11, flange surface; 20, cover body; 21, cover plate; 22, cover rim; 22a, accommodating cavity; 221, edge portion; 222, turn-up portion; 30, locking device; 31, tensioning member; 32, tensioner; 322, feed wheel; 323, handle; 324, fixed shaft; 325, ratchet wheel; 326, first pull hook; 327, second pull hook; 328, buffer wheel; 329, adjusting rope; 40, sealing gasket; 41, ring gasket; 42, gasket rim; 200, battery cell; 300, battery device; 400, controller; 500, motor; 1000, vehicle. DETAILED DESCRIPTION

[0076] The embodiments of the present application will be further described in details below with reference to the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0077] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0078] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned term in the embodiments of the present application can be understood according to the specific circumstances.

[0079] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" the second feature can be that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact through an intermediate medium. Moreover, the first feature "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0080] In the description of the specification, the description of the terms "some embodiments", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one of the embodiments or examples of the present application. In the specification, the exemplary description of the above terms does not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0081] At present, new energy batteries are increasingly widely used in life and industry. New energy batteries are not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0082] In many application scenarios, new energy batteries are increasingly widely used in life and industry, for example, battery-equipped new energy vehicles have been widely used, in addition, batteries are also increasingly used in energy storage fields, etc. In battery-equipped new energy vehicles, batteries can be used to provide power entirely or partially. With the increasing demand for batteries, the industry's requirements for the assembly efficiency of battery devices are also increasing, therefore, how to improve the assembly efficiency of battery devices is one of the research topics in the industry.

[0083] In the related art, the box body and the cover body of the battery box need to be fastened and connected, which is usually assembled by bolts. However, the use of bolts for assembly is complicated and results in low assembly efficiency.

[0084] Therefore, the embodiments of the present application provide a battery box which can improve the assembly efficiency of the battery device.

[0085] The embodiments of the present application also provide a battery device comprising a battery monomer and the battery box of any one of the embodiments of the present application; the battery monomer is arranged in the accommodating cavity of the battery box.

[0086] The embodiments of the present application also provide an energy storage device comprising the battery device of any one of the embodiments of the present application, for storing or providing electric energy.

[0087] Energy storage devices can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. They can store electrical energy as needed and deliver it when appropriate. For example, they can store energy during low-demand periods and provide it to users or devices during peak demand periods. Energy storage devices include energy storage containers and energy storage cabinets.

[0088] An embodiment of the present application further provides an electrical device, comprising the battery device of any one of the embodiments of the present application, for storing or providing electrical energy.

[0089] Electrically powered devices include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery-powered vehicles, electric cars, ships, spacecraft, etc. Electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0090] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as an example, which is described with reference to the accompanying drawings.

[0091] Figure 1 The schematic diagram of the structure of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery device 300 is disposed within vehicle 1000. Battery device 300 can be located at the bottom, front, or rear of vehicle 1000. Battery device 300 can be used to power vehicle 1000. For example, battery device 300 can serve as an operating power source for vehicle 1000. Vehicle 1000 can also include a controller 400 and a motor 500. Controller 400 is used to control battery device 300 to power motor 500, for example, to meet the power requirements of vehicle 1000 during startup, navigation, and driving.

[0092] In some embodiments of the present application, the battery device 300 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0093] The battery device 300 mentioned in the embodiment of the present application may include one or more battery cell assemblies for providing voltage. The battery cell assembly may include multiple battery cells, and the multiple battery cells are connected in series, parallel, or hybrid via a busbar.

[0094] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0095] In some embodiments, the battery device 300 can be a battery pack, which includes a battery box and one or more battery cell assemblies, the battery cell assemblies being accommodated in the battery box.

[0096] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0097] 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-acid battery, etc., which are not limited in the embodiments of the present application.

[0098] Although not shown, the battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions such as lithium ions are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time, the active ions can pass through.

[0099] In some embodiments, the electrode assembly is provided with a tab, which can guide the current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0100] In some embodiments, the electrode assembly can be in a winding structure, a laminated structure, or a hybrid structure of winding and laminating.

[0101] In some embodiments, the battery cell can include a shell. The shell is used to encapsulate the electrode assembly and components such as electrolyte. The shell can be a steel shell, an aluminum shell, a plastic shell such as polypropylene, a composite metal shell such as a copper-aluminum composite shell, or an aluminum-plastic film, etc.

[0102] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes, the prismatic battery cell including a square battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, for example, a hexagonal prismatic battery cell, etc., which are not particularly limited in the present application.

[0103] In some embodiments, the shell can be a sealed structure or a non-sealed structure. As an example, when the shell is a non-sealed structure, the shell serves to protect the electrode assembly, and a sealing bag is further included between the shell and the electrode assembly, which is used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating member or an aluminum plastic film. When the shell is a sealed structure, it is used to encapsulate the electrode assembly, the electrolyte and other components.

[0104] In some embodiments, at least one electrode terminal is arranged on the shell, and the electrode terminal is electrically connected with the tab. The electrode terminal can be directly connected with the tab or indirectly connected with the tab through a current collecting member. The electrode terminal can be arranged on the end cover or the shell.

[0105] Hereinafter, the application will be described in detail with reference to the drawings. Figures 2 to 12 The application will be described in detail below.

[0106] Please refer to Figures 2-3 The battery box 100 includes a box body 10, a cover body 20 and a locking device 30. The box body 10 has an accommodating cavity 10a with at least one open end. The cover body 20 includes a cover plate 21 and a cover rim 22, the cover rim 22 is connected to the circumferential side of the cover plate 21, and the cover plate 21 is arranged at the open end of the box body 10 so that the cover rim 22 can be arranged around the box body 10. The locking device 30 includes a tensioning member 31 and a tensioner 32, the tensioner 32 is arranged on at least one of the box body 10 and the cover body 20, the tensioning member 31 is arranged on the cover rim 22 in the circumferential direction, and the tensioner 32 is connected with the tensioning member 31 so that the tensioning member 31 can deform the cover rim 22 to be locked on the box body 10.

[0107] The battery box 100 provided by the application has at least one open end of the box body 10, and the cover body 20 is arranged at the open end of the box body 10. The tensioner 32 acts on the tensioning member 31 to make the tensioning member 31 tighten the cover rim 22 of the cover body 20, and the cover rim 22 can be deformed to tightly fit the box body 10 in the circumferential direction, thereby improving the locking strength of the box body 10 and the cover body 20. By operating the tensioner 32, the application does not need to set screws for assembly and fixing, which can save the cumbersome process of positioning and installing each screw, improve the assembly efficiency of the battery device 300, and facilitate the disassembly of the cover body 20 from the box body 10 during maintenance.

[0108] The battery box 100 can have various shapes, such as a cylinder or a cuboid. As an example, the structure of the battery box 100 is approximately a cuboid.

[0109] The box 10 has a containing cavity 10a for providing a space for containing the battery cell 200. Exemplarily, the containing cavity 10a is open at one end, and the cover 20 is arranged at the open end of the box 10. The locking device 30 is arranged corresponding to the cover 20. Alternatively, in some other embodiments not shown, the containing cavity 10a is open at two ends, and two covers 20 are respectively arranged at the two open ends of the box 10. Two locking devices 30 are respectively arranged corresponding to the two covers 20.

[0110] Exemplarily, the material of the box 10 can be an alloy material such as an aluminum alloy or a ferrous alloy, a high polymer material such as a polycarbonate or a polyisocyanurate foam plastic, or a composite material such as a glass fiber and epoxy resin composite.

[0111] The cover 20 is used for closing the containing cavity 10a. Similarly, the material of the cover 20 can also be an alloy material such as an aluminum alloy or a ferrous alloy, a high polymer material such as a polycarbonate or a polyisocyanurate foam plastic, or a composite material such as a glass fiber and epoxy resin composite.

[0112] It can be understood that the materials of the cover plate 21 and the cover rim 22 in the cover 20 can be the same or different.

[0113] It can also be understood that, in order to enable the cover rim 22 to be locked to the box 10, the material of the cover rim 22 is selected to be capable of deforming under the action of the tensioning member 31. For example, the material of the cover rim 22 can be a plastic material, a composite material of metal and plastic, or a metal material. The degree of deformation can be adaptively set according to the structural cooperation of the cover rim 22 and the box 10.

[0114] The form of the tensioning member 31 is not limited, as long as it can play a tensioning role in the circumferential direction of the cover rim 22 and lock the cover rim 22 to the box 10. It can be designed to be filamentous, flaky, or plate-shaped according to the requirements of structural strength, spatial layout, and the like. In some embodiments, the tensioning member 31 is configured as a tensioning filament, for example, having a circular cross section, which can reduce the space volume occupied by the tensioning member 31. Alternatively, the tensioning member 31 is configured as a tensioning flake, for example, having a rectangular cross section, which can increase the area of the force applied to the cover rim.

[0115] The material of the tensioning member 31 can be adaptively set according to requirements.

[0116] Exemplarily, the material of the tensioning member 31 is a metal material, for example, steel, which has high structural strength and low manufacturing cost.

[0117] Exemplarily, the material of the tensioning member 31 is an alloy material, which has high structural strength and good high-temperature resistance.

[0118] Exemplarily, the material of the tensioning member 31 is a high polymer material, which has good impact resistance and insulation performance, is corrosion-resistant, and can reduce the self-weight of the tensioning member 31.

[0119] Exemplarily, the material of the tensioning member 31 is a composite fiber material, which has good impact resistance and can reduce the self-weight of the tensioning member 31.

[0120] Exemplarily, the tensioning member 31 is a steel wire, which has high structural strength and occupies small space, and has low elongation under conditions of temperature change and vibration, and can achieve the tensioning effect between the box body 10 and the cover body 20.

[0121] The position of the tensioning member 31 relative to the cover rim 22 is not limited, for example, referring to Figures 4-10 , the tensioning member 31 can be embedded in the cover rim 22 or arranged outside the cover rim 22. The outside of the cover rim 22 includes the outer side of the cover rim 22 and the inner side of the cover rim 22.

[0122] In some embodiments, as shown in Figures 4-6 , the tensioning member 31 can be embedded in the cover rim 22, and the tensioning member 31 can move relative to the cover rim 22. In this way, the cover rim 22 can protect and limit the tensioning member 31, so as to avoid the tensioning member 31 being worn by long-time contact with other structures, causing structural damage, and avoiding the tensioning member 31 being vibrated and falling off due to impact.

[0123] For example, the cover body 20 can be a composite material, which is manufactured by a molding process, and the tensioning member 31 is embedded in the composite material. Alternatively, the cover body 20 can be a plastic material, which is manufactured by an injection molding process, and the tensioning member 31 is embedded in the plastic.

[0124] In some embodiments, as shown in Figure 4 , Figures 7-10 , the tensioning member 31 is arranged outside the cover rim 22. The outside of the cover rim 22 includes the outer side of the cover rim 22 and the inner side of the cover rim 22. Exemplarily, the cover rim 22 includes an edge portion 221 and a flange portion 222. For example, as shown in Figure 8 , the tensioning member 31 is arranged on the inner side of the edge portion 221 and the outer side of the flange portion 222. For example, as shown in Figure 10 , the tensioning member 31 is arranged on the outer side of the edge portion 221 and the inner side of the flange portion 222. In an embodiment not shown, the cover rim 22 can have no flange portion 222, and the tensioning member 31 is directly tensioned on the outer side of the edge portion 221. In this way, the assembly difficulty of the tensioning member 31 can be reduced.

[0125] The position of the tensioner 32 is not limited, which can be arranged on the box body 10 or the cover body 20, for example, the cover plate 21 or the cover rim 22, as long as it can tension the tensioning member 31. It can also be arranged on the box body 10 and the cover body 20. For example, the tensioner 32 can be embedded in the cover rim 22, arranged on the outer side of the cover rim 22, or arranged on the inner side of the cover rim 22.

[0126] The mounting mode of the tensioner 32 is not limited, and the tensioner 32 can be fixed on the box body 10 or the cover body 20. Alternatively, the tensioner 32 can be mounted on the cover rim 22 through the tensioning member 31, and the tensioning member 31 is fastened on the cover rim 22 after being tensioned. Since the tensioner 32 is connected to the tensioning member 31 and plays a tensioning role on the tensioning member 31, the tensioner 32 can be mounted on the cover rim 22 together with the tensioning member 31. In some embodiments, as shown in Figures 1-3 , the tensioner 32 is located on the outer side of the cover rim 22. In this way, the assembly difficulty of the tensioner 32 can be reduced, and the space on the inner side of the cover rim 22 is not occupied.

[0127] When the tensioner 32 is located on the outer side of the cover rim 22, the tensioning member 31 can be embedded in the cover rim 22 or arranged on the outer side of the cover rim 22.

[0128] In some other embodiments not shown, the tensioner 32 is located on the inner side of the cover rim 22. In this way, the cover rim 22 can protect the tensioner 32, so that the tensioner 32 is not worn out after long-time contact with the structure outside the cover rim 22, and the structure is not damaged.

[0129] When the tensioner 32 is located on the inner side of the cover rim 22, the tensioning member 31 can be embedded in the cover rim 22 or arranged on the outer side of the cover rim 22.

[0130] In some embodiments, as shown in Figures 7-10 , the cover rim 22 includes an edge portion 221 and a flange portion 222. The edge portion 221 is connected to the peripheral side of the cover plate 21, and the flange portion 222 is connected to the edge portion 221 to form a containing cavity 22a with the edge portion 221, and the tensioning member 31 is located in the containing cavity 22a. In this way, the flange portion 222 can fix and limit the tensioning member 31, so that when the tensioner 32 acts on the tensioning member 31, the tensioning member 31 can move in the containing cavity 22a, and the possibility that the tensioning member 31 moves out of the cover rim 22 is reduced.

[0131] The flange portion 222 can be flanged outward from the edge portion 221, or flanged inward from the edge portion 221.

[0132] For example, as shown in Figure 7 and Figure 8 , the flange portion 222 is flanged inward from the edge portion 221 to form the containing cavity 22a.

[0133] For example, the battery box further includes a sealing member, and the bottom of the sealing member abuts against the flange portion 222. In this way, the flange portion 222 can support and limit the sealing member, and the possibility that the sealing member falls off is reduced.

[0134] For example, as shown in Figure 9 and Figure 10The flange portion 222 is flanged outward along the edge portion 221 to form a receiving cavity 22a. In this way, the flange portion 222 does not occupy the space inside the edge portion 221.

[0135] It can be understood that the inside of the edge portion 221 refers to the side facing the receiving cavity 10a of the box body 10, and the outside of the edge portion 221 refers to the side facing the external environment of the box body 10.

[0136] In some embodiments, the tensioner 32 is a smart tensioner. The smart tensioner can improve the control efficiency and control accuracy of the tensioning force, and can improve the consistency of the tensioning force on the lid rim 22 in different batches of production. The smart tensioner may, for example, be an electric smart tensioner, a hydraulic smart tensioner, or a pneumatic smart tensioner, etc. The smart tensioner can be controlled by wired signals or wireless signals. The smart tensioner can be arranged inside and outside the lid rim 22. The outside of the lid rim 22 includes the outside and the inside of the lid rim 22.

[0137] As shown in Figure 13 , the smart tensioner includes a driving member 321 and a feed wheel 322, and the tensioning member 31 is wound around the feed wheel 322. The driving member 321 is drivingly connected to the feed wheel 322 to adjust the length of the tensioning member 31 along the circumference of the lid rim 22, so that the tensioning member 31 locks the lid rim 22 to the box body 10.

[0138] In other embodiments, the tensioner 32 is a mechanical tensioner. The mechanical tensioner has low cost and simple structure, and is easy to maintain later. For example, it can be a ratchet tensioner, a lever tensioner, a screw tensioner, a screw rod tensioner, or a spring self-locking tensioner, etc. The mechanical tensioner can be arranged on the outside of the lid rim 22.

[0139] As shown in Figure 14 , the mechanical tensioner includes a handle 323, a fixed shaft 324, and a feed wheel 322. The tensioning member 31 is wound around the feed wheel 322. The handle 323 is used to drive the feed wheel 322 to rotate to adjust the length of the tensioning member 31 along the circumference of the lid rim 22. The fixed shaft 324 is detachably connected to the feed wheel 322 to lock the feed wheel 322 or release the feed wheel 322 so that the feed wheel 322 can be driven to rotate by the handle 323. After adjustment, the feed wheel 322 can be locked by the fixed shaft 324 to prevent the feed wheel 322 from continuing to rotate. The handle 323 can be manually applied with a force, and the fixed shaft 324 can be manually detached and assembled.

[0140] As shown in Figure 15As shown, the mechanical tensioner includes a handle 323, a ratchet wheel 325, a first pull hook 326, a second pull hook 327, a buffer wheel 328, and an adjusting rope 329. The adjusting rope 329 is wound around the ratchet wheel 325 and is sleeved on the buffer wheel 328. The first pull hook 326 is connected to one end of the tensioning member 31 and the buffer wheel 328, respectively. The second pull hook 327 is connected to the other end of the tensioning member 31 and the ratchet wheel 325, respectively. The handle 323 is used to drive the ratchet wheel 325 to rotate, so as to change the length of the adjusting rope 329 along the circumference of the cover rim 22, thereby adjusting the length of the tensioning member 31 along the circumference of the cover rim 22. The force can be manually applied to the handle 323.

[0141] Exemplarily, the tensioner 32 can adaptively adjust the tensioning force, so as to timely adjust when the tensioning force decreases after long-time use, to maintain the tensioning force on the cover rim 22, and to keep the cover rim 22 tensioned on the box body 10.

[0142] The number of the tensioner 32 is not limited, and one, two or more than two can be set according to the needs.

[0143] In some embodiments, the number of the tensioner 32 is one, which can reduce the assembly difficulty and reduce the production cost. Exemplarily, the tensioning member 31 is an integrally formed member, and the tensioner 32 is connected to the two ends of the tensioning member 31 to apply the tensioning force.

[0144] In another embodiment not shown, the number of the tensioner 32 is at least two, and the at least two tensioners 32 are arranged at intervals on the cover body 20. In this way, the tensioning effect on the tensioning member 31 can be improved. Correspondingly, the number of the tensioning member 31 is multiple.

[0145] Exemplarily, the at least two tensioners 32 are evenly arranged at intervals on the cover body 20, to provide uniform force to the tensioning member 31, thereby improving the uniformity of the action on the cover rim 22.

[0146] In order to further improve the sealing effect between the box body 10 and the cover body 20, in some embodiments, referring to Figure 2 , Figure 3 , Figure 11 and Figure 12 , the battery box 100 further comprises a sealing member located between the box body 10 and the cover body 20 to seal the accommodation cavity 10a. The sealing member can be provided as a sealing pad, a sealing ring or a sealing glue, etc., and can also be provided as a sealing filler or a sealing adhesive to form a glue layer structure.

[0147] The cover body 20 is arranged on the box body 10, and the sealing member can be deformed by being extruded to play a sealing role. That is, the thickness of the sealing member is greater than the gap size between the box body 10 and the cover body 20 after the cover body 20 is arranged on the box body 10, so that the sealing member can be extruded to be deformed between the box body 10 and the cover body 20.

[0148] It can be understood that the shape of the sealing member is adapted to the shape of the box body 10 and the cover body 20, and is arranged along the outer periphery of the box body 10. Exemplarily, the sealing member is annular, which is not limited to a circular ring, but can also be other shapes.

[0149] It should be noted that when no sealing member is arranged between the box body 10 and the cover body 20, the sizes of the cover body 20 and the box body 10 are adapted. That is, after the cover body 20 is installed on the box body 10, there is almost no gap between the cover body 20 and the box body 10. In order to achieve a fastening connection and improve the sealing effect, after the cover body 20 is covered on the box body 10, the cover rim 22 is locked to the box body 10 by the locking device 30.

[0150] If a sealing member is arranged between the box body 10 and the cover body 20, the sizes of the cover body 20, the sealing member and the box body 10 are adapted. That is, after the cover body 20 is installed on the box body 10, the sealing member is pressed between the cover body 20 and the box body 10, and there is almost no gap between the sealing member and the cover body 20 and the box body 10, respectively. In order to achieve a fastening connection and improve the sealing effect, after the sealing member is installed on the box body 10 and the cover body 20 is covered on the box body 10, the cover rim 22 is locked by the locking device 30, and the sealing member is also locked, so that the cover rim 22 and the sealing member are locked to the box body 10.

[0151] Exemplarily, the sealing member can be a foamed silica gel member, which can be used for a long time and maintain soft and elastic properties, so as not to be affected by high-temperature airflow. At the same time, foamed silica gel is an environmentally friendly material, which is resistant to water and aging, non-corrosive, has low linear shrinkage, is not affected by a humid environment, and has stable service life and elastic properties.

[0152] Exemplarily, the sealing member can be a rubber member, such as a rubber ring. Alternatively, the sealing member can be a plastic member, such as PA6 (nylon 6), PEEK (polyether ether ketone), PPS (polyphenylene sulfide), PTFE (polytetrafluoroethylene resin), PC (polycarbonate), or PP (polypropylene), etc.

[0153] Exemplarily, the sealing glue can be epoxy resin glue or polyurethane glue, etc. Epoxy resin glue has high strength, heat resistance and good chemical stability. Polyurethane glue can realize bonding between various substrates, such as plastics or metals, etc., and has good flexibility and impact resistance.

[0154] Exemplarily, the sealing gasket 40 or the sealing ring is pasted on at least one of the box body 10 and the cover body 20 by back glue. The possibility of falling off of the sealing gasket 40 or the sealing ring during transportation can be reduced, the structure is simple, installation is convenient, and production efficiency can be improved.

[0155] In some embodiments, please refer to Figure 6 , Figure 8 ,Figures 10-12 The sealing gasket 40 comprises a ring gasket 41 and a gasket rim 42. The ring gasket 41 is arranged between the cover plate 21 and the flange surface 11 of the box body 10; the gasket rim 42 is connected with the ring gasket 41 and is arranged around the side wall of the box body 10 between the cover rim 22 and the side wall of the box body 10.

[0156] In this way, the ring gasket 41 is deformed by being pressed between the flange surface 11 of the box body 10 and the cover plate 21, and the gasket rim 42 is deformed by being pressed between the side wall of the box body 10 and the cover rim 22, so as to achieve the sealing effect.

[0157] Exemplarily, the cross section of the ring gasket 41 and the gasket rim 42 forms an inverted L-shaped structure. For example, based on the high sealing performance requirement of the battery pack of the immersion cooling system, it is necessary to increase the effective sealing width of the sealing ring to ensure the sealing performance of the battery pack. The ordinary sealing gasket is sealed to the flange surface 11 of the box body, and the width of the sealing gasket cannot be widened due to the limitation of the wall thickness of the box body. The sealing gasket 40 is designed as the inverted L-shaped ring gasket 41 and the gasket rim 42 in the embodiment, the sealing length is increased, and the sealing effect is improved.

[0158] In some embodiments, referring to Figure 8 The extension length L1 of the gasket rim 42 is less than the distance S1 between the tensioning member 31 and the cover plate 21, so that the tensioning member 31 can tension the cover rim 22 to the box body 10. That is, the tensioning member 31 is below the gasket rim 42, and the cover rim 22 can at least partially directly contact the box body 10 to tension the cover rim 22 to the box body 10 to achieve the fastening and sealing connection. The gasket rim 42 is located between the cover rim 22 and the box body 10 above the tensioning member 31 and is pressed by the cover rim 22 and the box body 10 to achieve the sealing effect.

[0159] It should be noted that, Figure 6 , Figure 8 and Figure 10 The cover rim 22 is in a state of not being deformed, and the gasket rim 42 is in a state of being able to be deformed. For example, the part of the turned edge portion 222 directly contacting the box body 10, the edge portion 221 is driven by the turned edge portion 222 to press the gasket rim 42 in the direction of the box body 10, and the sealing effect between the cover rim 22 and the box body 10.

[0160] The extension length of the gasket rim 42 refers to the length of the gasket rim 42 extending downward from the ring gasket 41 along the direction shown in Figure 8 , and should not be understood as the circumferential length.

[0161] Exemplarily, the cover rim 22 comprises an edge portion 221 and a turned edge portion 222, the turned edge portion 222 is turned inward along the edge portion 221 to form a receiving cavity 22a, and the tensioning member 31 is located in the receiving cavity 22a. Among them, the gasket rim 42 is located above the turned edge portion 222; or, the gasket rim 42 is at least partially located between the turned edge portion 222 and the box body 10.

[0162] Exemplarily, the cover rim 22 comprises an edge portion 221 and a flange portion 222, the flange portion 222 is outwardly flanged along the edge portion 221 to form a receiving cavity 22a in which the tensioning member 31 is located. The gasket rim 42 is located between the flange portion 222 and the box body 10.

[0163] In some embodiments, referring to Figure 10 , the gasket rim 42 has an extension length greater than the distance between the tensioning member 31 and the cover plate 21, so that the tensioning member 31 can tension the cover rim 22 and the gasket rim 42 to the box body 10. That is, the tensioning member 31 is above the bottom of the gasket rim 42, the part of the cover rim 22 that is tensioned directly contacts the gasket rim 42, and the gasket rim 42 is pressed by the force of the tensioning member 31 to seal between the cover rim 22 and the box body 10.

[0164] In some embodiments, referring to Figures 2-6 , the battery box 100 comprises a box body 10, a cover body 20, and a locking device 30. The box body 10 has a receiving cavity 10a with one end open; the cover body 20 comprises a cover plate 21 and a cover rim 22, the cover rim 22 is connected to the circumferential side of the cover plate 21, and the cover plate 21 is arranged at the open end of the box body 10 so that the cover rim 22 can be arranged around the box body 10; the locking device 30 comprises a tensioning member 31 and a tensioner 32, the tensioning member 31 is embedded in the cover rim 22, and the tensioner 32 is connected to the tensioning member 31 so that the tensioning member 31 can lock the cover rim 22 to the box body 10. The tensioning member 31 is configured as a steel wire, and the tensioner 32 is located outside the cover rim 22. The tensioner 32 is a smart control type tensioner 32 and the number is one. The battery box 100 further comprises a sealing gasket, which is located between the box body 10 and the cover body 20 to seal the receiving cavity 10a. The sealing gasket 40 comprises a ring gasket 41 and a gasket rim 42. The ring gasket 41 is arranged between the cover plate 21 and the flange surface 11 of the box body 10; the gasket rim 42 is connected to the ring gasket 41 and arranged around the side wall of the box body 10 between the cover rim 22 and the side wall of the box body 10.

[0165] In the embodiment, at least one end of the box body 10 is open, the cover body 20 is arranged at the open end of the box body 10, the tensioning member 31 is pulled by the tensioner 32 acting on the tensioning member 31, so that the cover rim 22 of the cover body 20 is pulled tightly by the tensioning member 31, the cover rim 22 is tightly matched with the box body 10, and the locking strength of the box body 10 and the cover body 20 can be improved. By operating the tensioner 32, it is not necessary to set bolts for assembly to realize fixation, the cumbersome process of separately positioning and installing each bolt can be saved, the assembly efficiency of the battery device 300 is improved, and the cover body 20 is also convenient to disassemble from the box body 10 during maintenance. The cover rim 22 can protect and limit the tensioning member 31, so as to prevent the tensioning member 31 from being worn due to long-time contact with other structures, causing the structure to be damaged, and preventing the tensioning member 31 from being vibrated and fallen off due to impact. The tensioning member 31 configured as a steel wire can reduce the space volume occupied by the tensioning member 31, has high structural strength, and has low manufacturing cost. The tensioner 32 is located outside the cover rim 22, which can reduce the assembly difficulty of the tensioner 32 and will not occupy the space inside the cover rim 22. The intelligent control type tensioner can improve the control efficiency and control accuracy of the tensioning force, and can improve the consistency of the tensioning force of the cover rim 22 in different batches of production. The ring pad 41 is deformed by being extruded between the flange surface 11 of the box body 10 and the cover plate 21, and the pad rim 42 is deformed by being extruded between the sidewall of the box body 10 and the cover rim 22, so as to play a sealing role.

[0166] The various embodiments / implementation modes provided in the present application can be combined with each other without producing contradictions, if possible.

[0167] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. 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 box characterized by, The battery box comprises: a box body having a receiving cavity with at least one open end; a cover body comprising a cover plate and a cover rim connected to the periphery of the cover plate, the cover plate being arranged at the open end of the box body so that the cover rim can be arranged around the box body; a locking device comprising a tensioning member and a tensioner, the tensioner being arranged on at least one of the box body and the cover body, the tensioning member being arranged on the cover rim in a circumferential direction, the tensioner being connected to the tensioning member so that the tensioning member can deform the cover rim to be locked to the box body.

2. The battery pack of claim 1, wherein, The tensioning member is embedded in the cover rim, and the tensioning member can move relative to the cover rim in the extension direction of the tensioning member.

3. The battery pack of claim 1, wherein, The cover rim comprises: an edge portion connected to the periphery of the cover plate; a flange portion connected to the edge portion to form a receiving cavity with the edge portion, and the tensioning member is located in the receiving cavity.

4. The battery pack of claim 3, wherein, The flange portion is inwardly flanged along the edge portion to form the receiving cavity; or The flange portion is outwardly flanged along the edge portion to form the receiving cavity.

5. The battery pack of claim 1, wherein, The tensioning member is arranged outside the cover rim.

6. The battery pack of claim 1, wherein, The tensioner is a mechanical tensioner; or the tensioner is an intelligent control tensioner.

7. The battery pack of claim 1, wherein, The number of tensioners is one; or the number of tensioners is at least two, and at least two tensioners are arranged at intervals on the cover body.

8. The battery pack of claim 1, wherein, The tensioner is located outside the cover rim; or the tensioner is located inside the cover rim.

9. The battery pack of claim 1, wherein, The tensioning member is configured as a tensioning wire or a tensioning sheet.

10. The battery pack of claim 1, wherein, The material of the cover rim is a metal material, a plastic material, or a composite material of metal and plastic.

11. The battery pack of claim 1, wherein, The material of the tensioning member is a metal material or a high polymer material.

12. The battery box according to any one of claims 1 to 11, characterized in that The battery box further comprises: a sealing member located between the box body and the cover body to seal the receiving cavity.

13. The battery pack of claim 12, wherein, The sealing member is a sealing gasket, and the sealing gasket comprises: a ring gasket arranged between the cover plate and the flange surface of the box body; a gasket rim connected to the ring gasket and arranged around the side wall of the box body between the cover rim and the side wall of the box body.

14. The battery pack of claim 13, wherein, The extension length of the gasket rim is less than the distance between the tensioning member and the cover plate, so that the tensioning member can tighten the cover rim to the box body; or The extension length of the gasket rim is greater than the distance between the tensioning member and the cover plate, so that the tensioning member can tighten the cover rim and the gasket rim to the box body.

15. A battery device characterized by comprising: The battery box comprises: The battery box according to any one of claims 1 to 14; a battery cell arranged in the receiving cavity.

16. An energy storage device, characterized by The battery device comprises: The battery device according to claim 15 is used for storing or providing electric energy.

17. An electrical device, characterized by The battery device comprises: The battery device according to claim 15 is used for storing or providing electric energy.

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