Battery device, box body thereof and electric equipment

Abstract

The embodiment of the utility model provides a battery device, a box body thereof and electric equipment. The battery device comprises a box body and at least one battery cell. The box body comprises a first sub-box body and a second sub-box body, the first sub-box body and the second sub-box body are buckled to form an accommodating cavity for accommodating the single battery, and the single battery is arranged in the accommodating cavity. The box body further comprises insulating coatings, the surfaces, facing the containing cavity, of the first sub-box body and the second sub-box body are each provided with an insulating coating, the box body further comprises a supporting beam arranged on the side, facing the containing cavity, of the first sub-box body and / or the second sub-box body, and the surfaces of the supporting beams are each provided with an insulating coating. In the battery device provided by the embodiment of the invention, the surfaces, facing the accommodating cavity, of the first sub-box body and the second sub-box body and the surfaces of the supporting beams are uniformly subjected to insulating and voltage-resisting treatment by using the insulating coatings, so that the insulating treatment of the box bodies can be completed by adopting integrated spraying in the actual production process, the cost is relatively low, and the production efficiency is relatively high.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a battery device and a housing thereof, and electrical equipment. Background Art

[0002] The battery device usually includes a box and a battery cell arranged in the box. The box needs to be treated with insulation and withstand voltage. In the related art, the cost of insulation and withstand voltage treatment is high, the production efficiency is low, and the risk of insulation and withstand voltage treatment failure is high, which affects the safety and reliability of the battery device. Utility Model Content

[0003] In view of this, the embodiments of the present application hope to provide a battery device and its box, and electrical equipment with low insulation processing cost, high production efficiency, and high safety and reliability.

[0004] The first aspect of an embodiment of the present application provides a battery device, comprising: a box body, comprising a first sub-box body and a second sub-box body, the first sub-box body and the second sub-box body being snapped together to form a accommodating cavity for accommodating a battery cell; at least one battery cell is arranged in the accommodating cavity, wherein the box body also includes an insulating coating, and the insulating coating is provided on each surface of the first sub-box body and the second sub-box body facing the accommodating cavity, and the box body also includes a support beam arranged on the side of the first sub-box body and / or the second sub-box body facing the accommodating cavity, and the insulating coating is provided on each surface of the support beam.

[0005] In the battery device of this embodiment, the surfaces of the first sub-box and the second sub-box facing the accommodating cavity are uniformly treated with an insulating coating for insulation and withstand voltage. In this way, in the actual production process, integrated spraying can be used to complete the insulation treatment of the box, which is low in cost and high in production efficiency. In addition, compared with the artificially bonded ceramic insulating tape, PC sheet, etc. in the related art, the insulating coating has stronger adhesion and lower risk of falling off, so it can reduce the risk of insulation failure and improve the safety and reliability of the battery device.

[0006] Furthermore, in the related art, the support beam is usually insulated by using foam material or aerogel blanket in combination with polyester packaging film, which has high labor costs and the risk of falling off. In this embodiment, the support beam is also insulated by using an insulating coating. In this way, the insulation treatment of the first sub-box, the second sub-box and the support beam can be completed at the same time during the actual production and preparation process, further reducing the cost of insulation treatment and improving production efficiency. It can also further reduce the risk of insulation failure and improve the safety and reliability of the battery device.

[0007] In some embodiments, the insulating coating is one of an epoxy zinc-rich coating, a cold-dip galvanizing coating or an inorganic zinc-rich coating.

[0008] In this embodiment, the insulating coating is a coating formed of a zinc-rich material. Thus, while having an insulating and voltage-resistant effect, it can also make the box body have an excellent corrosion resistance, thereby further improving the safety and reliability of the battery device.

[0009] In some embodiments, the insulating coating is disposed on at least one surface of the first sub-box and / or the second sub-box facing away from the accommodating cavity.

[0010] In this embodiment, an insulating coating is also provided on the surface of the first sub-box and / or the second sub-box away from the accommodating cavity, so that the corrosion resistance requirements of the box can be met at the same time as the insulation and voltage resistance treatment, further reducing production costs and improving production efficiency.

[0011] In some embodiments, the thickness of the insulating coating is 30 μm to 100 μm.

[0012] In this embodiment, the thickness of the insulating coating is set to 30 μm to 100 μm, so that a better insulation withstand voltage effect can be achieved and the cost and weight of the box can be controlled within a reasonable range.

[0013] In some embodiments, the insulation resistance of the box at a voltage of 1000V is greater than or equal to 1GΩ; and / or the leakage current of the box at a voltage of 5000V is less than or equal to 0.1mA; and / or the box meets the corrosion resistance requirements of a neutral salt spray test for more than 3000 hours.

[0014] In this embodiment, the box body meets the above requirements and can further improve the safety and reliability of the battery device.

[0015] In some embodiments, the housing further comprises: an environmentally friendly coating covering at least a portion of the outside of the insulating coating, wherein the environmentally friendly coating is used to suppress the release of volatile organic compounds in the insulating coating.

[0016] In this embodiment, an environmentally friendly coating is further provided, so that the release of volatile organic compounds from the battery device can be suppressed, so that the battery device has better environmental performance.

[0017] In some embodiments, the environmentally friendly coating is one of an acrylic polyurethane coating, a fluorocarbon coating, and an acrylic polysiloxane coating.

[0018] In this embodiment, the use of the above-mentioned environmentally friendly coating can make the battery device have better environmental performance and reduce production costs.

[0019] In some embodiments, the environmentally friendly coating includes a first region and a second region, and the first region and the second region have different color characteristics.

[0020] In this embodiment, the first area and the second area of ​​the environmentally friendly coating have different color characteristics, which can improve the aesthetics of the box and / or meet the requirements for the identification of the box.

[0021] In some embodiments, the thickness of the environmental protection coating is less than the thickness of the insulating coating.

[0022] In this embodiment, the thickness of the environmentally friendly coating is less than the thickness of the insulating coating, so that the cost and weight of the box can be further controlled within a reasonable range.

[0023] In some embodiments, at least a portion of the structure of the first sub-box and / or the second sub-box is an aluminum alloy structure, and an anodized layer is formed between the aluminum alloy structure and the insulating coating.

[0024] In this embodiment, an anodized layer is formed between the insulating coating and the aluminum alloy structure of the box body, which helps to improve the adhesion of the insulating coating and further improve the corrosion resistance of the box body.

[0025] A second aspect of an embodiment of the present application provides a box body of a battery device, the box body comprising: a first sub-box and a second sub-box, the first sub-box and the second sub-box being snapped together to form a receiving space for accommodating battery cells; a support beam, arranged on the first sub-box and / or the second sub-box facing the receiving cavity; and an insulating coating, the insulating coating being arranged on each surface of the first sub-box and the second sub-box facing the receiving space and each surface of the support beam.

[0026] A third aspect of the embodiments of the present application provides an electrical device, which includes the battery device of the first aspect of the embodiments of the present application.

[0027] The box body and the electrical equipment of the battery device of the embodiment of the present application have all the advantages of the battery device described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application;

[0029] Figure 2 An exploded schematic diagram of a battery device according to an embodiment of the present application;

[0030] Figure 3 This is a schematic structural diagram of a second sub-box according to an embodiment of the present application;

[0031] Figure 4 A schematic structural diagram of the second sub-box from another perspective of the embodiment of the present application;

[0032] Figure 5 A schematic diagram of the positional relationship between the second sub-box and the insulating coating in an embodiment of the present application;

[0033] Figure 6 This is a schematic diagram of the positional relationship between the second sub-box, the insulating coating and the environmentally friendly coating in the embodiment of the present application;

[0034] Figure 7 This is a schematic diagram of the positional relationship between the second sub-box, the anodized layer and the insulating coating in an embodiment of the present application.

[0035] Description of Reference Numerals

[0036] 1000. Vehicle; 100. Battery device; 1. Box; 1a. Accommodating cavity; 11. First sub-box; 12. Second sub-box; 121. Frame; 122. Bottom plate; 13. Insulating coating; 14. Support beam; 141. Cross beam; 142. Longitudinal beam; 15. Environmentally friendly coating; 16. Anodized layer; 2. Battery cell; 200. Controller; 300. Motor. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0039] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagrams, which may be the left and right directions in normal use or not.

[0040] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0041] In the description of the present application, the orientation or position relationship of "first direction" and "second direction" is based on the orientation or position relationship shown in the accompanying drawings, wherein the "first direction" is the direction indicated by the arrow L1 in the accompanying drawings, and the "second direction" is the direction indicated by the arrow L2 in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0045] The embodiments of the present application provide a battery device and a housing thereof, and electrical equipment.

[0046] The battery device mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells, and the plurality of battery cells are connected in series, in parallel or in mixed connection through a busbar.

[0047] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] As an example, the box may include a first sub-box and a second sub-box. The first sub-box and the second sub-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 sub-box can be a top cover or a bottom plate.

[0053] 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.

[0054] 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.

[0055] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0056] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0057] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0058] The case of the battery device needs to be insulated and subjected to voltage resistance treatment. In the related art, there are differences in the insulation treatment methods at different positions in the case of the battery device, and such differences will lead to an increase in the cost of the insulation and voltage resistance treatment. Taking the case of the battery device including the top cover and the lower case as an example, the surface of the top cover facing the battery cell is usually insulated with a ceramic composite tape or a blue film, and the frame of the lower case is usually insulated by a combination of a ceramic composite tape and a PC sheet. The welds are shielded with PC sheets, and the bottom plate is insulated with insulating powder spraying. The above-mentioned ceramic composite tapes, PC sheets, etc. all need to be fixed to the corresponding parts of the case by manual bonding, which has high labor costs and low production efficiency. In addition, they are prone to falling off during actual use, and the risk of insulation failure is high, which affects the reliability and safety of the battery device.

[0059] In view of the above problems, a battery device of the present application is proposed. The battery device of an embodiment of the present application includes a case and at least one battery cell. The case includes a first sub-case and a second sub-case, the first sub-case and the second sub-case are buckled together to form a receiving cavity for receiving the battery cell, and the battery cell is arranged in the receiving cavity. The case also includes an insulating coating, and the surfaces of the first sub-case and the second sub-case facing the receiving cavity are provided with an insulating coating. The case also includes a support beam arranged on the side of the first sub-case and / or the second sub-case facing the receiving cavity, and the surfaces of the support beam are provided with an insulating coating.

[0060] In the battery device of this embodiment, the surfaces of the first sub-box and the second sub-box facing the accommodating cavity are uniformly treated with an insulating coating for insulation and withstand voltage. In this way, in the actual production process, integrated spraying can be used to complete the insulation treatment of the box, which is low in cost and high in production efficiency. In addition, compared with the artificially bonded ceramic insulating tape, PC sheet, etc. in the related art, the insulating coating has stronger adhesion and lower risk of falling off, so it can reduce the risk of insulation failure and improve the safety and reliability of the battery device.

[0061] Furthermore, in the related art, the support beam is usually insulated by using foam material or aerogel blanket in combination with polyester packaging film, which has high labor costs and the risk of falling off. In this embodiment, the support beam is also insulated by using an insulating coating. In this way, the insulation treatment of the first sub-box, the second sub-box and the support beam can be completed at the same time during the actual production and preparation process, further reducing the cost of insulation treatment and improving production efficiency. It can also further reduce the risk of insulation failure and improve the safety and reliability of the battery device.

[0062] For the convenience of explanation, the following embodiments take the electric device as a vehicle as an example to introduce the structure of the battery device and the electric device of the present application in detail.

[0063] Please refer to Figure 1 , Figure 1 The electrical equipment provided for some embodiments of the present application is a schematic diagram of the structure of a vehicle 1000. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The vehicle 1000 is provided with a battery device 100, and the battery device 100 can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for powering the vehicle 1000, for example, the battery device 100 can be used as an operating power supply for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000. In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also as the driving power supply of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0064] Reference Figure 2-Figure 5 The battery device 100 of the embodiment of the present application includes a housing 1 and at least one battery cell 2. The housing 1 includes a first sub-housing 11 and a second sub-housing 12. The first sub-housing 11 and the second sub-housing 12 are buckled together to form a receiving cavity 1a for receiving the battery cell 2. The battery cell 2 is arranged in the receiving cavity 1a. The housing 1 also includes an insulating coating 13. The surfaces of the first sub-housing 11 and the second sub-housing 12 facing the receiving cavity 1a are provided with the insulating coating 13. The housing 1 also includes a support beam 14 arranged on the side of the first sub-housing 11 and / or the second sub-housing 12 facing the receiving cavity 1a. The surfaces of the support beam 14 are provided with the insulating coating 13.

[0065] The specific structure of the first sub-box 11 and the second sub-box 12 is not limited. As an example, the second sub-box 12 can be the top cover of the box 1, and the second sub-box 12 can be the lower box, which can specifically include a frame 121 and a bottom plate 122. The specific method of buckling the first sub-box 11 and the second sub-box 12 is not limited, and the buckling can be achieved by means of threaded connection, snap fit, etc.

[0066] The accommodating cavity 1a formed by the buckling of the first sub-box 11 and the second sub-box 12 may be a closed space, where the closed space refers to covering or closing, and may be sealed or unsealed.

[0067] Insulating coating 13 is provided on all surfaces of the first sub-box 11 and the second sub-box 12 facing the accommodating cavity 1a. The surface facing the accommodating cavity 1a here specifically refers to the surface whose normal vector is located inside the accommodating cavity 1a, and it is not required that the surface is directly opposite to the accommodating cavity 1a.

[0068] In the actual production and preparation process, the insulating coating can be sprayed on the above-mentioned surfaces of the first sub-box 11 and the second sub-box 12 to form the insulating coating 13. In order to improve the adhesion of the insulating coating 13, the above-mentioned surfaces of the first sub-box 11 and the second sub-box 12 can be subjected to surface treatments such as decontamination, degreasing, and anodization before spraying. The specific spraying process can refer to the relevant technology in the field, which will not be repeated here.

[0069] The specific material of the insulating coating 13 is not limited, as long as it can achieve the insulating effect expected by those skilled in the art. The relevant part below will specifically give some optional materials for the insulating coating 13, which will not be repeated here.

[0070] The support beam 14 here refers to a beam-like structure protruding from the side surface of the first sub-box 11 and / or the second sub-box 12 facing the accommodating cavity 1a, which is mainly used to increase the structural strength of the first sub-box 11 / the second sub-box 12, and / or to limit and support the battery cell 2 in the accommodating cavity 1a to limit the displacement, thermal expansion and deformation of the battery cell 2.

[0071] The support beam 14 can be provided in the first sub-box 11 or the second sub-box 12 , or in both the first sub-box 11 and the second sub-box 12 . The number of the support beams 14 can be one or two or more.

[0072] Taking the first sub-box 11 as the top cover of the box 1 and the second sub-box 12 as the lower box as an example, the support beam 14 may specifically include at least one cross beam 141 and at least one longitudinal beam 142 disposed on the bottom plate 122 of the second sub-box 12 facing the accommodating cavity 1a, wherein the cross beam 141 extends along the first direction and is connected to the frame 121 at both ends, and the longitudinal beam 142 extends along the second direction and is connected to the frame 121 at both ends. The first direction and the second direction intersect, and as an example, the first direction is the length direction of the box 1, and the second direction may be the width direction of the box 1.

[0073] Each surface of the support beam 14 is provided with an insulating coating 13 , and each surface of the support beam 14 here includes any exposed surface of the support beam 14 .

[0074] In the battery device 100 of this embodiment, the surfaces of the first sub-box 11 and the second sub-box 12 facing the accommodating cavity 1a are uniformly insulated with an insulating coating 13, so that in the actual production process, the insulation treatment of the box 1 can be completed by integrated spraying, which is low in cost and high in production efficiency. In addition, compared with the artificially bonded ceramic insulating tape, PC sheet, etc. in the related art, the insulating coating 13 has stronger adhesion and lower risk of falling off, so it can reduce the risk of insulation failure and improve the safety and reliability of the battery device 100.

[0075] Furthermore, in the related art, the support beam is usually insulated by using a foam material or an aerogel blanket in combination with a polyester packaging film, which has high labor costs and the risk of falling off. In this embodiment, the support beam 14 is also insulated by using an insulating coating 13. In this way, the insulation treatment of the first sub-box 11, the second sub-box 12 and the support beam 14 can be completed at the same time during the actual production and preparation process, further reducing the cost of the insulation treatment and improving production efficiency. It can also further reduce the risk of insulation failure and improve the safety and reliability of the battery device 100.

[0076] In some embodiments, the insulating coating 13 is one of an epoxy zinc-rich coating, a cold-dip galvanizing coating or an inorganic zinc-rich coating.

[0077] Epoxy zinc-rich is a coating composed of epoxy resin, zinc powder, ethyl silicate as main raw materials, thickener, filler, additives, solvent, etc.

[0078] Cold galvanizing is a coating made of high-purity ultrafine zinc powder, solvents, additives, etc. that has been specially treated with conductive organic resin using a special coating coating technology.

[0079] Inorganic zinc-rich coatings are composed of inorganic substances as binders, plasticizers, anti-settling agents, leveling agents, thixotropic agents, zinc powder, etc.

[0080] The specific material ratios of epoxy zinc-rich, cold-dip galvanizing, and inorganic zinc-rich as well as the specific process for forming the coating can refer to the relevant technology in the field and will not be described in detail here.

[0081] In this embodiment, the insulating coating 13 is a coating formed of a zinc-rich material. Thus, while having an insulating and voltage-resistant effect, it can also enable the box body 1 to have an excellent corrosion resistance, thereby further improving the safety and reliability of the battery device 100 .

[0082] In some embodiments, an insulating coating 13 is disposed on at least one surface of the first sub-box 11 and / or the second sub-box 12 facing away from the accommodating cavity 1 a.

[0083] The surface facing away from the accommodating cavity 1a here specifically refers to the surface whose normal vector is located outside the accommodating cavity 1a, and it is not required that the surface is completely facing away from the accommodating cavity 1a. Among the surfaces of the first sub-box 11 and / or the second sub-box 12 facing away from the accommodating cavity 1a, only a part of them can be provided with the insulating coating 13, or all of them can be provided with the insulating coating 13, and there is no limitation on this.

[0084] As mentioned above, the insulating coating 13 formed of zinc-rich material used in the embodiment of the present application has good corrosion resistance. Therefore, in the present embodiment, an insulating coating 13 is also provided on the surface of the first sub-box 11 and / or the second sub-box 12 away from the accommodating cavity 1a, so that the corrosion resistance requirements of the box 1 can be met at the same time as the insulation and voltage resistance treatment, thereby further reducing production costs and improving production efficiency.

[0085] In some embodiments, the thickness of the insulating coating 13 is 30 μm-100 μm.

[0086] The above numerical range includes endpoint values. As an example, the thickness of the insulating coating 13 can be 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, 100μm, etc.

[0087] It should be noted that, in the present embodiment, the insulating coating 13 at various positions of the box body 1 may be of equal thickness or substantially equal thickness (for example, the thickness difference does not exceed 3μm, 5μm, 7μm, 10μm, etc.), or of unequal thickness (for example, the thickness difference exceeds 10μm, 15μm, 20μm, 25μm, 30μm, etc.), and there is no limitation on this.

[0088] The specific thickness of the insulating coating 13 can be determined by those skilled in the art according to the specific materials of the first sub-box 11 and the second sub-box 12 and the insulation withstand voltage requirement of the box 1 .

[0089] In this embodiment, the thickness of the insulating coating 13 is set to 30 μm-100 μm, so that a better insulation withstand voltage effect can be achieved and the cost and weight of the box body 1 can be controlled within a reasonable range.

[0090] In some embodiments, the insulation resistance of the box 1 at a voltage of 1000V is greater than or equal to 1GΩ; and / or the leakage current of the box 1 at a voltage of 5000V is less than or equal to 0.1mA; and / or the box 1 meets the corrosion resistance requirements of a neutral salt spray test for more than 3000 hours.

[0091] The voltage values ​​mentioned above at least include DC voltage values, and in some embodiments, may also include AC voltage values.

[0092] In this embodiment, the box body 1 meets the above requirements and can further improve the safety and reliability of the battery device 100.

[0093] In some embodiments, reference Figure 6 The housing 1 further includes an environmentally friendly coating 15 , which covers at least a portion of the outer side of the insulating coating 13 , and is used to suppress the release of volatile organic matter in the insulating coating 13 .

[0094] It is understandable that the insulating coating 13 may contain volatile organic compounds, such as benzene, aldehydes, etc. The release of the above substances may produce odor, harm human health, etc., and the environmentally friendly coating 15 is used to inhibit the release of such substances.

[0095] The specific material of the environmental protection coating 15 is not limited, as long as it can achieve the effect of inhibiting the release of volatile organic compounds. In the actual production and preparation process, the environmental protection coating 15 can be sprayed after the insulating coating 13 is sprayed. The environmental protection coating 15 can only cover a part of the insulating coating 13, or it can cover the entire insulating coating 13. Those skilled in the art can choose according to actual use requirements.

[0096] In this embodiment, an environmentally friendly coating 15 is further provided, so that the release of volatile organic matter from the battery device 100 can be suppressed, so that the battery device 100 has better environmental performance.

[0097] In some other embodiments, the environmentally friendly coating 15 may not be provided, and other means may be used to suppress the release of volatile organic compounds, or a coating with good environmental performance may be selected to prepare the insulating coating 13.

[0098] In some embodiments, the environmentally friendly coating 15 can be one of an acrylic polyurethane coating, a fluorocarbon coating, and an acrylic polysiloxane coating.

[0099] In this embodiment, the use of the environmentally friendly coating 15 can enable the battery device 100 to have better environmental performance and reduce production costs.

[0100] In some embodiments, the environmentally friendly coating 15 includes a first region and a second region, and the first region and the second region have different color characteristics.

[0101] Here, the first area and the second area have different color characteristics, which specifically means that there is a color difference between the first area and the second area that can be distinguished by the naked eye. As an example, the environmentally friendly coating 15 with different color characteristics can be formed by adding different pigments to the environmentally friendly coating, or the pigment can be sprayed on the surface of the environmentally friendly coating after it is sprayed.

[0102] It should be noted that, in addition to the first area and the second area, the environmentally friendly coating 15 may also include more areas with different color characteristics.

[0103] In this embodiment, the first area and the second area of ​​the environmentally friendly coating 15 have different color characteristics, so that the aesthetics of the box 1 can be improved and / or the identification requirements of the box 1 can be met.

[0104] In some embodiments, the thickness of the environmental protection coating 15 is less than the thickness of the insulating coating 13 .

[0105] The thickness of the environmental protection coating 15 is less than the thickness of the insulating coating 13, which specifically means that the thickness of the environmental protection coating 15 at the same point is less than the thickness of the insulating coating 13, and does not exclude the possibility that the thickness of the insulating coating 13 at a certain point is greater than the thickness of the insulating coating 13 at another point.

[0106] In this embodiment, the thickness of the environmental protection coating 15 is smaller than the thickness of the insulating coating 13 , so that the cost and weight of the box body 1 can be further controlled within a reasonable range.

[0107] In some embodiments, reference Figure 7 At least a portion of the structure of the first sub-box 11 and / or the second sub-box 12 is an aluminum alloy structure, and an anodized layer 16 is formed between the aluminum alloy structure and the insulating coating 13 .

[0108] The anodized layer 16 specifically refers to an oxide film formed by anodizing the aluminum alloy structure. In the actual production process, the aluminum alloy structure can be anodized and then sprayed with insulating paint to form the insulating coating 13.

[0109] In this embodiment, an anodized layer 16 is formed between the insulating coating 13 and the aluminum alloy structure of the housing 1 , which helps to improve the adhesion of the insulating coating 13 and further improve the corrosion resistance of the housing 1 .

[0110] The battery device 100 involved in one or more of the above embodiments will be described in more detail and detail below in conjunction with several specific embodiments. Embodiment 1

[0111] The battery device 100 of this embodiment includes a box body 1 and at least one battery cell 2. The box body 1 includes a first sub-box body 11 and a second sub-box body 12. The first sub-box body 11 is a top cover, and the second sub-box body 12 is a lower box body. The second sub-box body 12 specifically includes a frame and a bottom plate 122. The first sub-box body 11 and the second sub-box body 12 are buckled to form a receiving cavity 1a for receiving the battery cell 2. The box body 1 also includes a support beam 14 arranged on the side of the second sub-box body 12 facing the receiving cavity 1a. The support beam 14 includes at least one cross beam 141 and at least one longitudinal beam 142. The cross beam 141 extends along a first direction and is connected to the frame 121 at both ends. The longitudinal beam 142 extends along a second direction and is connected to the frame 121 at both ends. The first direction is the length direction of the box body 1, and the second direction is the width direction of the box body 1.

[0112] The box body 1 also includes an insulating coating 13 and an environmentally friendly coating 15 . The insulating coating 13 is provided on each surface of the first sub-box body 11 and the second sub-box body 12 facing the accommodating cavity 1a , and each surface of the support beam 14 . The environmentally friendly coating 15 covers the outside of the insulating coating 13 .

[0113] The insulating coating 13 is an epoxy zinc-rich coating, the environmentally friendly coating 15 is an acrylic polyurethane coating, the thickness of the insulating coating 13 is 30-100 μm, and the thickness of the environmentally friendly coating 15 at the same point is less than the thickness of the insulating coating 13 .

[0114] The box 1 of the battery device 100 of this embodiment has an insulation resistance of greater than or equal to 1 GΩ at a DC voltage of 1000V, a leakage current of less than or equal to 0.1 mA at a DC voltage of 5000V, and meets the corrosion resistance requirement of a neutral salt spray test of more than 3000 hours. Embodiment 2

[0115] The difference from the first embodiment is that the insulating coating 13 is also provided on at least one side surface of the first sub-box 11 and / or the second sub-box 12 facing away from the accommodating cavity 1 a in the second embodiment. Embodiment 3

[0116] The difference from the first embodiment is that at least a part of the structure of the first sub-box 11 and / or the second sub-box 12 of the third embodiment is an aluminum alloy structure, and an anodized layer 16 is formed between the aluminum alloy structure and the insulating coating 13 .

[0117] The embodiment of the present application also provides a box 1 of a battery device 100, referring to Figure 2-Figure 5, including a first sub-box 11, a second sub-box 12, a support beam 14 and an insulating coating 13. The first sub-box 11 and the second sub-box 12 are buckled to form a receiving space for accommodating the battery cell 2. The support beam 14 is arranged on the side of the first sub-box 11 and / or the second sub-box 12 facing the receiving cavity 1a, and the surfaces of the first sub-box 11 and the second sub-box 12 facing the receiving space and the surfaces of the support beam 14 are all provided with an insulating coating 13.

[0118] The specific structure of the box body 1 can refer to the description of the relevant parts above, which will not be repeated here.

[0119] An embodiment of the present application further provides an electrical device, which includes the battery device 100 described in any of the above embodiments.

[0120] The housing 1 and the electrical equipment of the battery device 100 of the embodiment of the present application have all the advantages of the battery device 100 described in any of the above embodiments, which will not be described in detail here.

[0121] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0122] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: The battery device comprises: The box body comprises a first sub-box body and a second sub-box body, wherein the first sub-box body and the second sub-box body are buckled together to form a receiving cavity; At least one battery cell is arranged in the accommodating cavity, wherein the box body also includes an insulating coating, and the insulating coating is provided on each surface of the first sub-box body and the second sub-box body facing the accommodating cavity; the box body also includes a support beam arranged on the side of the first sub-box body and / or the second sub-box body facing the accommodating cavity, and the insulating coating is provided on each surface of the support beam.

2. The battery device according to claim 1, characterized in that: The insulating coating is one of an epoxy zinc-rich coating, a cold-dip galvanizing coating or an inorganic zinc-rich coating.

3. The battery device according to claim 2, characterized in that: The insulating coating is disposed on at least one side surface of the first sub-box and / or the second sub-box facing away from the accommodating cavity.

4. The battery device according to claim 2, characterized in that: The thickness of the insulating coating is 30 μm to 100 μm.

5. The battery device according to claim 2, characterized in that: The insulation resistance of the box at a voltage of 1000V is greater than or equal to 1GΩ; and / or The leakage current of the box at a voltage of 5000V is less than or equal to 0.1mA; and / or The box meets the corrosion resistance requirement of a neutral salt spray test for more than 3000 hours.

6. The battery device according to any one of claims 1 to 5, characterized in that: The box also includes: The environmental protection coating covers at least a portion of the outer side of the insulating coating, and the environmental protection coating is used to suppress the release of volatile organic matter in the insulating coating.

7. The battery device according to claim 6, characterized in that: The environmentally friendly coating is one of an acrylic polyurethane coating, a fluorocarbon coating and an acrylic polysiloxane coating; and / or The environmentally friendly coating comprises a first region and a second region, wherein the first region and the second region have different color characteristics; and / or The thickness of the environmental protection coating is smaller than the thickness of the insulating coating.

8. The battery device according to any one of claims 1 to 5, characterized in that: At least a part of the structure of the first sub-box and / or the second sub-box is an aluminum alloy structure, and an anodized layer is formed between the aluminum alloy structure and the insulating coating.

9. A box for a battery device, characterized in that: The box body comprises: A first sub-box and a second sub-box, wherein the first sub-box and the second sub-box are buckled together to form a receiving space for receiving a battery cell; A support beam is arranged on a side of the first sub-box and / or the second sub-box facing the accommodating cavity; and Insulating coating, each surface of the first sub-box and the second sub-box facing the receiving space and each surface of the supporting beam are provided with the insulating coating.

10. An electrical device, characterized in that: The electrical equipment comprises the battery device according to any one of claims 1-8.

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