Battery device, energy storage device and power utilization device

Abstract

The utility model discloses a battery device, an energy storage device and a power utilization device, and relates to the technical field of batteries. The battery device comprises a battery box, a plurality of single batteries, a high-voltage box body and a high-voltage power distribution circuit, and the single batteries are accommodated in the battery box; the high-voltage box body is accommodated in the battery box, and an accommodating cavity is formed in the high-voltage box body; the high-voltage power distribution circuit is electrically connected with the plurality of single batteries, the high-voltage power distribution circuit comprises a plurality of electric appliance elements, part of the plurality of electric appliance elements are accommodated in the accommodating cavity, the rest of the plurality of electric appliance elements comprise first fuses, and the first fuses are accommodated in the battery box and located outside the high-voltage box body. According to the battery device, the energy storage device and the power utilization device provided by the invention, the short-circuit risk can be reduced.

Description

TECHNICAL FIELD

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

[0002] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like. In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. In the field of energy storage, the batteries can be installed in an energy storage box or directly installed at a user side.

[0003] With the continuous development of battery technology, how to reduce the short circuit risk of the battery is one of the topics that the industry needs to study. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the present application provides a battery device, an energy storage device and a power utilization device capable of reducing the short circuit risk.

[0005] The present application is implemented through the following technical solutions.

[0006] The first aspect of the present application provides a battery device, comprising: a battery box; a plurality of battery monomers contained in the battery box; a high-voltage box body contained in the battery box, the high-voltage box body having a containing cavity therein; a high-voltage power distribution circuit electrically connected with the plurality of battery monomers, the high-voltage power distribution circuit comprising a plurality of electrical elements, part of the plurality of electrical elements being contained in the containing cavity, and the rest of the plurality of electrical elements comprising a first fuse, the first fuse being contained in the battery box and being outside the high-voltage box body.

[0007] In the embodiments of the present application, by placing the first fuse outside the high-voltage box body, the space in the high-voltage box body can be released, so that other electrical elements (such as relays, sensors, etc.) can have more space available, the electrical clearance can be improved, and thus the short circuit risk can be reduced. At the same time, the structure of the external first fuse makes the replacement process of the first fuse more convenient, and the maintenance cost is reduced. In addition, the external first fuse obtains an independent heat dissipation space, and the heat dissipation effect of the first fuse is improved.

[0008] In some embodiments, the battery box forms a battery containing cavity and a high-voltage box containing cavity arranged along a first direction, the plurality of battery monomers are contained in the battery containing cavity, the high-voltage box body and the plurality of electrical elements are contained in the high-voltage box containing cavity, the first fuse is arranged along a second direction with the high-voltage box body, and the second direction intersects the first direction.

[0009] Thus, the battery box is divided into a battery housing cavity and a high-voltage box housing cavity, which reduces the risk of electromagnetic interference through physical isolation and facilitates modular maintenance. Furthermore, the arrangement direction of the battery housing cavity and the high-voltage box housing cavity intersects with the arrangement direction of the first fuse and the high-voltage box body, which helps to make efficient use of space. In addition, electrical components (such as contactors and sensors) are centrally located in the high-voltage box housing cavity, reducing the complexity of the wiring harness and facilitating high integration.

[0010] In some embodiments, the two opposite ends of the high-voltage box receiving cavity along the second direction are a first end and a second end, respectively, the high-voltage box body is located at the first end of the high-voltage box receiving cavity, and the first fuse is located on the side of the high-voltage box body facing the second end.

[0011] Thus, by placing the high-voltage box body at the first end of the high-voltage box receiving cavity, the side of the high-voltage box receiving cavity facing the second end of the high-voltage box body has a large and continuous space, which facilitates the arrangement of other electrical components. Furthermore, by placing the first fuse in this large and continuous space, a large distance can be maintained between the first fuse and other electrical components in this space, thereby increasing the electrical clearance and reducing the risk of short circuits.

[0012] In some embodiments, a first beam separates the battery housing cavity from the high-voltage box housing cavity, and the first beam is closer to the first fuse relative to the cavity wall of the battery housing cavity opposite to the first beam.

[0013] Thus, the first beam divides the enclosed space inside the battery box into a battery housing cavity and a high-voltage box housing cavity. Furthermore, electrical plugs or sockets are typically installed on the cavity wall opposite the first beam. By installing the first fuse closer to the first beam, space is freed up near this cavity wall to accommodate the portion of the electrical plugs or sockets extending into the battery housing cavity, as well as the wiring harnesses or conduits connected to the electrical plugs or sockets. This results in a more rational layout, increases the electrical clearance between electrical components, and further reduces the risk of short circuits.

[0014] In some embodiments, the battery device further includes a mounting assembly, through which a first fuse is mounted within a high-voltage box housing cavity, and the mounting assembly is connected to a first beam.

[0015] In this way, the first fuse is securely installed in the high-voltage box cavity by the installation components and supported by the first beam, which not only improves the stability of the first fuse installation, but also facilitates later maintenance and replacement operations.

[0016] In some embodiments, the mounting assembly includes: at least one first connector connected to a first beam, at least a portion of the first connector extending in a first direction toward a side opposite to the battery housing cavity; a mounting base connected to the first connector, and a first fuse mounted on the mounting base.

[0017] In this way, the first fuse is connected to the first beam through the first connector and supported by the mounting base, which improves the installation reliability of the first fuse and facilitates subsequent positioning and fixing, making the first fuse less likely to loosen or fall off during use.

[0018] In some embodiments, a second beam is provided in the high-voltage box receiving cavity, and the two ends of the second beam are respectively connected to the first beam and the cavity wall of the high-voltage box receiving cavity that is opposite to the first beam along a first direction. The mounting assembly also includes at least one second connector, which is connected to the second beam. At least a portion of the second connector extends toward the high-voltage box body along a second direction and is connected to the mounting base.

[0019] Thus, the structural strength of the enclosure is improved by the addition of the second beam. Furthermore, the synergistic effect of the second beam and the second connector enhances the structural strength and stability of the mounting components, ensuring that the first fuse maintains a good installation condition even under complex operating conditions, thereby improving the operational reliability of the battery device.

[0020] In some embodiments, the mounting assembly further includes at least two first fasteners, with each of the opposite ends of the mounting base connected to a first connector and a second connector respectively via at least one first fastener.

[0021] In this way, by setting the first fasteners at both ends of the mounting base and connecting them to the first and second connecting parts respectively, the overall rigidity and installation stability of the mounting base are improved, and the probability of displacement or loosening caused by vibration is effectively reduced.

[0022] In some embodiments, a heat exchanger is connected to the cavity wall at one end of the high-pressure box receiving cavity along a third direction. The third direction intersects both the first direction and the second direction. A second beam is disposed on the side of the heat exchanger facing away from the cavity wall. The first connector and the second connector abut against the surface of the heat exchanger facing away from the cavity wall. A mounting base is connected to the side of the first connector and the second connector facing away from the heat exchanger.

[0023] Thus, the heat exchange component provides a good heat dissipation environment for the first fuse, while the first and second connectors, in contact with the heat exchange component, achieve the dual functions of structural support and heat conduction. Furthermore, in the presence of a heat exchange component, to reduce damage to the heat exchange component caused by direct connection to the mounting base, it is necessary to use the first and second connectors to connect to the mounting base.

[0024] In some embodiments, the second connector includes a first part, a second part, and a third part. The second part extends along a third direction and its two ends are respectively connected to the first part and the third part. The first part and the third part are respectively disposed on opposite sides of the second part along the second direction. The first part abuts against the heat exchanger, the second part abuts against the surface of the second beam facing the high-pressure box, and the third part is connected to the surface of the second beam facing away from the heat exchanger.

[0025] In this way, the multi-segment structure of the second connector enables large-area contact and connection with the heat exchange component and the second beam, enhancing the reliability of the connection between the second connector and the second beam, while also facilitating heat transfer and dissipation.

[0026] In some embodiments, the mounting base has a heat dissipation through-hole extending along a third direction, and the projection of the first fuse along the third direction overlaps with the projection of the heat dissipation through-hole.

[0027] Thus, by providing heat dissipation holes in the mounting base and matching their position with that of the first fuse, the heat dissipation efficiency of the first fuse can be improved, its operating temperature reduced, thereby extending its service life and improving the reliability of the battery device.

[0028] In some embodiments, the mounting base includes a base portion and a mounting protrusion protruding from the side of the base portion facing away from the heat exchanger. The base portion is connected to a first connector and a second connector, and a first fuse is mounted on the side of the mounting protrusion facing away from the heat exchanger.

[0029] Thus, by installing the protrusion, the precise controllability of the installation position of the first fuse is improved, and the potential thermal conduction interference caused by its direct contact with the heat exchange component is reduced, thereby improving the reliability of the battery device. Furthermore, the protrusion of the mounting protrusion relative to the base portion allows the connection positions between the base portion and the first and second connectors to be staggered in the third direction from the connection position between the mounting protrusion and the first fuse, reducing mutual interference between the two connection operations and facilitating the routing of the high-voltage wiring harness connected to the first fuse.

[0030] In some embodiments, the first connector and / or the second connector are metal sheets; the mounting base is an insulating base.

[0031] By using metal sheets for the first and / or second connectors, the rigidity and strength of the first and / or second connectors are improved, enhancing the reliability of the mounting base. Furthermore, the metal sheets improve thermal conductivity. Using an insulating base as the mounting base helps reduce safety hazards caused by electrical short circuits and improves the electrical reliability of the battery device.

[0032] In some embodiments, the battery device further includes an insulating protective cover installed inside the high-voltage box housing and covering the outside of the first fuse.

[0033] Thus, by setting up an insulating protective cover, the first fuse is given additional protection, reducing the intrusion of external foreign objects or accidental contact by personnel, thereby improving the reliability of the battery device.

[0034] In some embodiments, the plurality of electrical components further include a high-voltage output connector mounted on the wall of the battery box. The arrangement direction of the two connection terminals of the first fuse is consistent with the second direction. One connection terminal of the first fuse that is closer to the high-voltage housing is electrically connected to the portion of the plurality of electrical components housed in the accommodating cavity, and the other connection terminal is electrically connected to the high-voltage output connector.

[0035] This configuration helps reduce the length of the connection path and the space occupied, while improving the stability and reliability of the connection.

[0036] In some embodiments, the battery device further includes an electrical connector, which includes a first connection portion, a second connection portion, and a third connection portion. The second connection portion and the third connection portion are respectively connected to the first connection portion. The first connection portion is connected to the connection terminal of the first fuse away from the high voltage housing. The second connection portion is electrically connected to the high voltage output connector. The third connection portion serves as a voltage sampling point.

[0037] In this way, by connecting the first fuse through the first connecting part, electrically connecting the high-voltage output connector through the second connecting part, and collecting voltage through the third connecting part, the remote control and monitoring function of the first fuse is realized, which helps to grasp the working status of the first fuse in real time, detect potential faults in a timely manner, and take countermeasures.

[0038] In some embodiments, the battery device further includes a battery management unit disposed within the high-voltage box cavity and located outside the high-voltage box body. The battery management unit is electrically connected to a plurality of battery cells, and a third connection portion of the electrical connector is electrically connected to the battery management unit.

[0039] In this way, by connecting the battery management unit to the third connection part of the electrical connector, real-time acquisition and processing of the voltage status of the first fuse is realized, which helps to improve the intelligent management level of the battery device.

[0040] In some embodiments, a carrier is provided in the accommodating cavity, which divides the accommodating cavity into a high-voltage zone and a low-voltage zone arranged along a third direction. The third direction intersects both the first direction and the second direction. The portion of the plurality of electrical components housed in the accommodating cavity includes at least one high-voltage electrical component and at least one low-voltage electrical component. The high-voltage electrical component is installed on the side of the carrier facing the high-voltage zone, and the low-voltage electrical component is installed on the side of the carrier facing the low-voltage zone.

[0041] In this way, the accommodating cavity is divided into high-voltage and low-voltage zones by the carrier, achieving physical isolation between high- and low-voltage electrical components, which helps to improve the electrical safety and operational stability of the battery device.

[0042] In some embodiments, the high-voltage zone is provided with a plurality of high-voltage electrical components, at least a portion of which are arranged along a first direction, and / or at least a portion of which are arranged along a second direction.

[0043] In this way, by arranging the high-voltage electrical components along the first and / or second directions, the probability of stacking the high-voltage electrical components can be reduced, and the high-voltage electrical components can be arranged reasonably. The layout can be flexibly adjusted according to actual needs, improving space utilization and also helping to optimize the heat dissipation path.

[0044] A second aspect of this application provides an energy storage device that includes a plurality of battery devices provided in the first aspect, the battery devices being used to store or provide electrical energy.

[0045] Since energy storage devices include battery devices, they possess all the beneficial effects of battery devices because energy storage devices have a low risk of short circuits.

[0046] A third aspect of this application provides an electrical device that includes a plurality of battery devices provided in the first aspect, the battery devices being used to store or provide electrical energy.

[0047] Because electrical devices include battery devices, and electrical devices include all the beneficial effects of battery devices, the risk of short circuits in electrical devices is low.

[0048] The beneficial effects of the embodiments disclosed herein include: providing a battery device, energy storage device, and power consumption device that can reduce the risk of short circuits. Attached Figure Description

[0049] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0050] Figure 1 This is a schematic diagram of the structure of a vehicle according to one or more embodiments;

[0051] Figure 2 This is an exploded perspective view of a battery device according to one or more embodiments;

[0052] Figure 3This is a top view of a portion of the structure of a battery device according to one or more embodiments;

[0053] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0054] Figure 5 for Figure 3 A partial schematic diagram showing an electrical connector connected to the first fuse in the circuit.

[0055] Figure 6 This is a perspective structural schematic diagram of a mounting base according to one or more embodiments;

[0056] Figure 7 A front view of a first fuse according to one or more embodiments;

[0057] Figure 8 A top view of a first fuse according to one or more embodiments;

[0058] Figure 9 This is a three-dimensional structural schematic diagram of an insulating protective cover according to one or more embodiments;

[0059] Figure 10 This is a three-dimensional exploded view of a high-voltage housing and components housed within the high-voltage housing according to one or more embodiments.

[0060] Figure 11 This is a top view of the high-voltage zone inside a high-voltage housing according to one or more embodiments.

[0061] Explanation of reference numerals in the attached figures

[0062] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 1, Battery Box; 10, Battery Receiving Chamber; 20, High Voltage Box Receiving Chamber; 11, Top Cover; 12, Box Body; 121, Base Plate; 122, Side Beam; 123, Separator Beam; 123a, First Beam; 123b, Second Beam; 2, Battery Cell; 3, High Voltage Box Body; 31, First Box Body; 32, Second Box Body; 33, Bearing Component; 41, Electrical Component; 41a, First Fuse; 411, Connecting Terminal; 4111, Third Connecting Hole; 41b, Precharge Relay; 41c, Precharge Resistor; 41d, Main Positive Relay; 41e, Hall Sensor; 41f, Second Fuse; 41g, Third Fuse; 41h, Fourth Fuse; 42, Copper Busbar; 43, High Voltage Wiring Harness; 43 a. First high-voltage wiring harness; 5. Mounting assembly; 51. Mounting base; 511. Base part; 512. Mounting protrusion; 5121. Limiting protrusion; 513. Heat dissipation through hole; 514. First metal sleeve; 5141. First connecting hole; 515. Second metal sleeve; 5151. Second connecting hole; 52. First connector; 521. First section; 53. Second connector; 531. First part; 532. Second part; 533. Third part; 54. First fastener; 55. Second fastener; 6. Heat exchange plate; 61. Heat exchange component; 7. Insulating protective cover; 71. Cover part; 711. Clearance hole; 72. Mounting flange; 9. Electrical connector; 91. First connecting part; 92. Second connecting part; 93. Third connecting part; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation

[0063] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0066] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0068] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0069] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0070] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0071] The following is a detailed description of this application.

[0072] Currently, new energy batteries are being used more and more widely in daily life and industry. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0073] In the battery system of electric vehicles, high-voltage power distribution design is a key aspect of ensuring the electrical safety and stable operation of the entire vehicle. Typically, the high-voltage box, as a core component, undertakes multiple functions such as current distribution, circuit protection, and signal acquisition, and integrates various electrical components such as fuses, relays, and sensors.

[0074] In related technologies, fuses are integrated into the high-voltage box and directly connected to other components via copper busbars or circuit boards to achieve a compact layout and fast response. However, while these designs improve system reliability to some extent, they generally suffer from the problem of excessively compact electrical components within the high-voltage box with small electrical clearances. This can easily lead to the breakdown of the air medium between high-voltage components, resulting in arc discharge. Arc discharge can directly cause short circuits between electrical circuits, leading to problems such as abnormal current inside the battery device. Moreover, this discharge can also generate instantaneous high temperatures (up to several thousand degrees Celsius), igniting surrounding flammable materials or damaging electrical components.

[0075] Therefore, the inventors of this application discovered through research that by placing at least some of the fuses outside the high-voltage box, space inside the high-voltage box can be freed up, allowing other electrical components (such as relays, control modules, etc.) to be rearranged and optimized, thereby improving electrical clearance and reducing the risk of short circuits. At the same time, externally placed fuses facilitate replacement and maintenance without disassembling the high-voltage box, improving maintenance efficiency and reducing maintenance costs.

[0076] Based on this design concept, the inventors of this application have designed a battery device, which includes a battery box, multiple battery cells, a high-voltage housing, and a high-voltage power distribution circuit. The multiple battery cells are housed in the battery box; the high-voltage housing is housed in the battery box and has a receiving cavity; the high-voltage power distribution circuit is electrically connected to the multiple battery cells and includes multiple electrical components, some of which are housed in the receiving cavity, and the remaining parts of the multiple electrical components include a first fuse, which is housed in the battery box and located outside the high-voltage housing.

[0077] This design, by placing the first fuse outside the high-voltage box, frees up space inside the box, allowing for the rearrangement and optimized placement of other electrical components (such as relays and sensors). This improves electrical clearance and reduces the risk of short circuits. Furthermore, external fuse placement facilitates replacement and maintenance without disassembling the high-voltage box, improving maintenance efficiency and reducing costs.

[0078] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0079] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0080] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0081] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0082] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0083] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0084] In some embodiments, the battery box may be part of the vehicle's chassis structure. For example, a portion of the battery box may be at least a part of the vehicle's floor, or a portion of the battery box may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0085] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0086] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0087] A single battery cell includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0088] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0089] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0090] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0091] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM333), LiNi 0.5 Co 0.2 Mn 0.3O2 (also known as NCM523), LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM211), LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM622), LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM811), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05 At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0092] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0093] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative current collector.

[0094] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0095] As an example, the negative electrode sheet may include a negative current collector and a negative active material disposed on at least one surface of the negative current collector.

[0096] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0097] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0098] In some embodiments, the negative electrode can be made of foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not contain a negative electrode active material.

[0099] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0100] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0101] The technical solutions described in the embodiments of this application are applicable to various power devices that use battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0102] The technical solutions described in the embodiments of this application are applicable to various energy storage devices that use battery devices, such as energy storage containers or energy storage cabinets.

[0103] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this application. The description is as follows with reference to the accompanying drawings.

[0104] Figure 1 This is a structural schematic diagram of a vehicle 1000 according to one or more embodiments.

[0105] Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. For example... Figure 1As shown, a battery device 100 is installed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0106] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0107] Figure 2 This is an exploded perspective view of a battery device 100 according to one or more embodiments.

[0108] like Figure 2 As shown, the battery device 100 includes a battery box 1 and at least one battery cell 2. The battery box 1 has a closed space, and the at least one battery cell 2 is housed in the closed space.

[0109] In some embodiments of this application, the battery box 1 may include a top cover 11 and a box body 12. The top cover 11 and the box body 12 are fastened together, forming a closed space inside the battery box 1 to accommodate the individual battery cells 2. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0110] The housing 12 can be a hollow structure with one open end, and the top cover 11 can be a plate-like structure. The top cover 11 closes to the open side of the housing 12 so that the top cover 11 and the housing 12 together define a closed space. Alternatively, both the top cover 11 and the housing 12 can be hollow structures with one open side, with the open side of the top cover 11 closing to the open side of the housing 12. Of course, the battery box 1 formed by the top cover 11 and the housing 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0111] In the battery device 100, there can be multiple battery cells 2, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 2 are connected in both series and parallel configurations. Multiple battery cells 2 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 2 is placed in the enclosed space formed by the housing 12 and the top cover 11. Alternatively, the battery device 100 can also consist of multiple battery cells 2 first connected in series, parallel, or in a mixed manner to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the enclosed space formed by the housing 12 and the top cover 11. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 2.

[0112] In this embodiment, the battery cell 2 can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0113] The battery cell 2 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0114] As an example, the battery cell 2 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0115] Below, refer to Figures 2 to 11 Some embodiments of this application will be described in detail.

[0116] Figure 2 This is an exploded perspective view of a battery device 100 according to one or more embodiments; Figure 3 This is a top view of a portion of the structure of a battery device according to one or more embodiments; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 A partial schematic diagram showing an electrical connector connected to the first fuse in the circuit. Figure 6 This is a perspective structural schematic diagram of a mounting base according to one or more embodiments; Figure 7 A front view of a first fuse according to one or more embodiments; Figure 8 A top view of a first fuse according to one or more embodiments; Figure 9 This is a three-dimensional structural schematic diagram of an insulating protective cover according to one or more embodiments; Figure 10This is a three-dimensional exploded view of a high-voltage housing and components housed within the high-voltage housing according to one or more embodiments. Figure 11 This is a top view of the high-voltage zone inside a high-voltage housing according to one or more embodiments.

[0117] In some embodiments of this application, for ease of explanation, a first direction, a second direction, and a third direction are defined. These three directions intersect each other; here, intersecting each other includes perpendicularly intersecting each other. For ease of understanding of the embodiments of this application, in... Figures 1 to 11 In the illustrated embodiments, the first direction, the second direction, and the third direction are given as examples where they intersect each other perpendicularly. However, those skilled in the art should understand that the embodiments of this application are not limited to the case where these three directions intersect each other perpendicularly. For ease of explanation, as follows... Figures 1 to 11 As shown by the arrows, the direction of arrow X is the first direction, the direction of arrow Y is the second direction, and the direction of arrow Z is the third direction. Sometimes, the direction that arrow Z points in along the third direction is called "up," and its opposite direction is called "down."

[0118] The first aspect of this application provides a battery device 100, such as Figures 2 to 4 As shown, the battery device 100 includes a battery box 1, multiple battery cells 2, a high-voltage housing 3, and a high-voltage power distribution circuit. The multiple battery cells 2 are housed in the battery box 1. The high-voltage housing 3 is housed in the battery box 1 and has a receiving cavity. The high-voltage power distribution circuit is electrically connected to the multiple battery cells 2. The high-voltage power distribution circuit includes multiple electrical components 41. Some of the multiple electrical components 41 are housed in the receiving cavity. The remaining parts of the multiple electrical components 41 include a first fuse 41a. The first fuse 41a is housed in the battery box 1 and located outside the high-voltage housing 3.

[0119] It should be noted that the first fuse 41a located outside the high-voltage box 3 can be one, two, three, or more, and the specific number is not limited here. The portion of the multiple electrical components 41 housed within the accommodating cavity of the high-voltage box 3 may or may not include fuses.

[0120] The high-voltage housing 3 refers to the shell structure located inside the battery box 1, used to house and fix electrical components 41 (such as relays, current sensors, etc.). It has certain sealing and electromagnetic shielding performance to ensure the safe operation of the high-voltage circuit. The high-voltage housing 3 can be made of metal. The accommodating cavity is the space area inside the high-voltage housing 3 used to place the electrical components 41. According to functional requirements, it can be divided into high-voltage area and low-voltage area to achieve clearer electrical isolation and zone management.

[0121] The high-voltage power distribution circuit is a crucial circuit system connecting the battery cell 2 and the load, responsible for distributing and controlling the transmission of high-voltage electrical energy. The high-voltage power distribution circuit includes multiple electrical components 41, such as relays, fuses, and current sensors. It also includes multiple high-voltage wiring harnesses 43 and multiple copper busbars 42, which are used for electrical connections between the electrical components 41. The relays, fuses, current sensors, and other electrical components 41 work together to control, monitor, and protect the high-voltage power distribution circuit. In this embodiment, some electrical components 41 are installed within the accommodating cavity of the high-voltage housing 3, while others (such as the first fuse 41a) are located inside the battery box 1 and outside the high-voltage housing 3.

[0122] The first fuse 41a is an electrical component 41 used for overload or short-circuit protection. It automatically cuts off the circuit when the current exceeds the rated value, thereby reducing the risk of equipment damage or safety accidents. In this embodiment, the first fuse 41a is located outside the high-voltage box 3 and is connected to the electrical component 41 inside the high-voltage box 3 via a high-voltage wiring harness 43 to form a high-voltage power distribution circuit.

[0123] It is understood that the high-voltage power distribution circuit also includes a high-voltage wire harness 43 or a copper busbar 42 connected between electrical components 41. The high-voltage wire harness 43 or the copper busbar 42 in the high-voltage power distribution circuit can be housed in the cavity of the high-voltage box 3 or can be set outside the high-voltage box 3. The high-voltage wire harness 43 has a high withstand voltage rating and good electromagnetic shielding performance. The high-voltage wire harness 43 improves the stability and safety of high-voltage current transmission.

[0124] For example, such as Figure 4 As shown, the external first fuse 41a is electrically connected to the electrical components 41 inside the high-voltage box 3 via the first high-voltage wiring harness 43a.

[0125] In this embodiment, by placing the first fuse 41a outside the high-voltage box 3, space within the high-voltage box 3 can be freed up, allowing other electrical components 41 (such as relays, sensors, etc.) to have more usable space, thereby improving electrical clearance and reducing the risk of short circuits. Simultaneously, the external placement of the first fuse 41a makes its replacement process more convenient, reducing maintenance costs. Furthermore, the external placement of the first fuse 41a provides independent heat dissipation space, improving its heat dissipation effect.

[0126] In some embodiments, such as Figure 3 and Figure 4As shown, the battery box 1 has a battery receiving cavity 10 and a high voltage box receiving cavity 20 arranged along the first direction X. Multiple battery cells 2 are housed in the battery receiving cavity 10, and the high voltage box 3 and multiple electrical components 41 are housed in the high voltage box receiving cavity 20. The first fuse 41a and the high voltage box 3 are arranged along the second direction Y, and the second direction Y intersects the first direction X.

[0127] Thus, the battery box 1 is internally divided into a battery housing cavity 10 and a high-voltage box housing cavity 20. Physical isolation reduces the risk of electromagnetic interference and facilitates modular maintenance. Furthermore, the arrangement direction of the battery housing cavity 10 and the high-voltage box housing cavity 20 intersects with the arrangement direction of the first fuse 41a and the high-voltage box body 3, which helps to make efficient use of space. In addition, electrical components 41 (such as contactors and sensors) are centrally arranged in the high-voltage box housing cavity 20, reducing the complexity of the wiring harness and facilitating high integration.

[0128] In some embodiments, such as Figure 3 and Figure 4 As shown, the high-voltage box receiving cavity 20 has a first end and a second end opposite to each other along the second direction Y. The high-voltage box body 3 is located at the first end of the high-voltage box receiving cavity 20, and the first fuse 41a is located on the side of the high-voltage box body 3 facing the second end.

[0129] It should be noted that "the high-voltage box body 3 is located at the first end of the high-voltage box receiving cavity 20" means that the high-voltage box body 3 is set close to the cavity wall of the first end of the high-voltage box receiving cavity 20. This can mean that the high-voltage box body 3 is in direct contact with the cavity wall of the first end of the high-voltage box receiving cavity 20, or that there is a small gap between them. The specific size of this small gap is not specifically limited here, and will be determined according to the actual shape of the high-voltage box body 3, the shape of the high-voltage box receiving cavity 20, and the actual situation.

[0130] Thus, by placing the high-voltage box 3 at the first end of the high-voltage box receiving cavity 20, a large and continuous space is provided on the side of the high-voltage box 3 facing the second end within the high-voltage box receiving cavity 20. This facilitates the arrangement of other electrical components 41. Furthermore, by placing the first fuse 41a within this large and continuous space, a larger distance can be maintained between the first fuse 41a and other electrical components 41 within this space, thereby increasing the electrical clearance and reducing the risk of short circuits.

[0131] In some embodiments, such as Figure 3 and Figure 4 As shown, a first beam 123a separates the battery housing cavity 10 and the high voltage box housing cavity 20. The first beam 123a is closer to the first fuse 41a than the cavity wall of the battery housing cavity 10 opposite to the first beam 123a.

[0132] For example, such as Figure 2 andFigure 3 As shown, the battery box 1 includes a top cover 11 and a box body 12. The box body 12 includes a bottom plate 121, a plurality of side beams 122 surrounding the bottom plate 121, and at least one partition beam 123 connecting the bottom plate 121 and the side beams 122. The at least one partition beam 123 includes a first beam 123a, which divides the enclosed space between the bottom plate 121, the plurality of side beams 122, and the top cover 11 into a battery receiving cavity 10 and a high voltage box receiving cavity 20.

[0133] Thus, by setting the first beam 123a, the enclosed space inside the battery box 1 is divided into the battery housing cavity 10 and the high-voltage box housing cavity 20, allowing the battery cells 2 and the high-voltage power distribution circuit to be separated. This reduces the risk of electromagnetic interference through physical isolation and facilitates modular maintenance. Furthermore, electrical plugs or sockets are usually installed on the cavity wall of the battery housing cavity 10 opposite to the first beam 123a. By installing the first fuse 41a closer to the first beam 123a, space is freed up near the cavity wall to accommodate the portion of the electrical plugs or sockets that extend into the battery housing cavity 10, as well as the wiring harnesses or conduits connected to the electrical plugs or sockets. This makes the layout more reasonable, increases the electrical clearance between the electrical components 41, and further reduces the risk of short circuits.

[0134] In some embodiments, such as Figure 4 As shown, the battery device 100 also includes a mounting assembly 5. The first fuse 41a is mounted in the high-voltage box receiving cavity 20 via the mounting assembly 5. The mounting assembly 5 is connected to the first beam 123a.

[0135] Mounting assembly 5 refers to a set of mechanical structures used to support and fix the first fuse 41a, including components such as connectors and mounting base 51.

[0136] Thus, by installing the first fuse 41a securely in the high-voltage box cavity 20 using the mounting component 5 and supporting it with the first beam 123a, not only is the installation stability of the first fuse 41a improved, but it also facilitates later maintenance and replacement operations.

[0137] In some embodiments, such as Figure 4 and Figure 5 As shown, the mounting assembly 5 includes a mounting base 51 and at least one first connector 52, the first connector 52 being connected to the first beam 123a, at least a portion of the first connector 52 extending along a first direction X toward the side opposite to the battery receiving cavity 10; the mounting base 51 is connected to the first connector 52, and the first fuse 41a is mounted on the mounting base 51.

[0138] Thus, the first fuse 41a is connected to the first beam 123a through the first connector 52 and supported by the mounting base 51, which improves the installation reliability of the first fuse 41a and facilitates subsequent positioning and fixing, making the first fuse 41a less likely to loosen or fall off during use.

[0139] In some embodiments, such as Figure 4 and Figure 5 As shown, a second beam 123b is provided in the high-voltage box receiving cavity 20. The two ends of the second beam 123b are respectively connected to the first beam 123a and the cavity wall of the high-voltage box receiving cavity 20 that is opposite to the first beam 123a along the first direction X. The mounting assembly 5 also includes at least one second connector 53. The second connector 53 is connected to the second beam 123b. At least a portion of the second connector 53 extends toward the high-voltage box body 3 along the second direction Y and is connected to the mounting base 51.

[0140] For example, the battery box 1 includes a top cover 11 and a box body 12. The box body 12 includes a bottom plate 121, a plurality of side beams 122 surrounding the bottom plate 121, and at least one partition beam 123 connecting the bottom plate 121 and the side beams 122. The at least one partition beam 123 includes a first beam 123a and a second beam 123b. The first beam 123a divides the enclosed space between the bottom plate 121, the plurality of side beams 122, and the top cover 11 into a battery receiving cavity 10 and a high-voltage box receiving cavity 20. The second beam 123b is disposed in the high-voltage box receiving cavity 20 and extends along a first direction X, and its two ends are respectively connected to the first beam 123a and the cavity wall of the high-voltage box receiving cavity 20 opposite to the first beam 123a along the first direction X.

[0141] Thus, the structural strength of the housing 12 is improved by the setting of the second beam 123b. Furthermore, the structural strength and stability of the mounting assembly 5 are enhanced through the synergistic effect of the second beam 123b and the second connector 53, so that the first fuse 41a can still maintain a good installation condition under complex working conditions, thereby improving the operational reliability of the battery device 100.

[0142] In some embodiments, such as Figure 5 As shown, the mounting assembly 5 also includes at least two first fasteners 54, and the opposite ends of the mounting base 51 are respectively connected to the first connector 52 and the second connector 53 by at least one first fastener 54.

[0143] For example, the first fastener 54 may include, but is not limited to, bolts, nuts, screws, studs, washers, retaining rings, rivets, welding studs, etc.

[0144] For example, one end of the mounting base 51 along the second direction Y is connected to the first connector 52 via a first fastener 54. The other end of the mounting base 51 along the second direction Y is connected to the second connector 53 via another first fastener 54.

[0145] Thus, by setting first fasteners 54 at both ends of the mounting base 51 and connecting them to the first connector 52 and the second connector 53 respectively, the overall rigidity and installation stability of the mounting base 51 are improved, effectively reducing the probability of displacement or loosening caused by vibration.

[0146] In some embodiments, such as Figure 5 As shown, a heat exchanger 61 is connected to the cavity wall of the high-pressure box receiving cavity 20 along the third direction Z. The third direction Z intersects both the first direction X and the second direction Y. The second beam 123b is located on the side of the heat exchanger 61 facing away from the cavity wall. The first connector 52 and the second connector 53 abut against the surface of the heat exchanger 61 facing away from the cavity wall. The mounting base 51 is connected to the side of the first connector 52 and the second connector 53 facing away from the heat exchanger 61.

[0147] The heat exchanger 61 is a structural component used to assist in heat dissipation. It is disposed in the high-voltage box cavity 20 and can conduct heat to the electrical components 41 in the high-voltage box cavity 20. It also contacts the first connector 52 and the second connector 53 to help conduct heat, thereby improving the thermal management capability of the battery device 100.

[0148] It is understandable that the "cavity wall" in "the second beam 123b is located on the side of the heat exchanger 61 facing away from the cavity wall" refers to the cavity wall connected to the heat exchanger 61.

[0149] For example, such as Figures 2 to 4 As shown, the top cover 11 and the body 12 of the battery box 1 are fastened together along the third direction Z. The part of the top cover 11 opposite to the bottom plate 121 of the body 12 along the third direction Z is the top plate. A heat exchange plate 6 is connected to the side of the bottom plate 121 facing the top plate. Each partition beam 123 is located on the side of the heat exchange plate 6 away from the bottom plate 121. That is, the first beam 123a and the second beam 123b are both located on the side of the heat exchange plate 6 away from the bottom plate 121. The part of the heat exchange plate 6 located on the side of the first beam 123a along the first direction X is the heat exchange element 61. That is, the part of the heat exchange plate 6 located in the high voltage box cavity 20 is the heat exchange element 61, which is used to perform thermal management on the high voltage box cavity 20. The part of the heat exchange plate 6 located on the other side of the first beam 123a along the first direction X carries the battery cell 2. That is, the part of the heat exchange plate 6 located in the battery cavity 10 carries the battery cell 2, which is used to perform thermal management on the battery cavity 10. For example, the heat exchange plate 6 can be, but is not limited to, a water-cooled plate.

[0150] Thus, the heat exchanger 61 provides a good heat dissipation environment for the first fuse 41a. Simultaneously, the first connector 52 and the second connector 53 contact the heat exchanger 61, achieving the dual functions of structural support and heat conduction. Furthermore, with the heat exchanger 61 present, to reduce damage to the heat exchanger 61 caused by direct connection to the mounting base 51, it is necessary to use the first connector 52 and the second connector 53 to connect to the mounting base 51.

[0151] For example, the first connector 52 only abuts against the heat exchanger 61.

[0152] For example, the first connector 52 abuts against the heat exchanger 61 and is connected by fasteners.

[0153] For example, the second connector 53 only abuts against the heat exchanger 61.

[0154] For example, the second connector 53 abuts against the heat exchanger 61 and is connected by fasteners.

[0155] In some embodiments, as shown in the figure, the first connector 52 includes a first segment 521 and a second segment (not shown) that are intersected and connected. The first segment 521 extends along a first direction X and abuts against the heat exchanger 61. The side of the first segment 521 facing away from the heat exchanger 61 is connected to the mounting base 51. The second segment extends along a third direction Z and is connected to the surface of the first beam 123a facing the high-pressure box cavity 20.

[0156] For example, the first connector 52 is a one-piece molded structure.

[0157] In some embodiments, such as Figure 5 As shown, the second connector 53 includes a first part 531, a second part 532, and a third part 533. The second part 532 extends along the third direction Z, and its two ends are respectively connected to the first part 531 and the third part 533. The first part 531 and the third part 533 are disposed on opposite sides of the second part 532 along the second direction Y. The first part 531 abuts against the heat exchanger 61, the second part 532 abuts against the surface of the second beam 123b facing the high-pressure box 3, and the third part 533 is connected to the surface of the second beam 123b facing away from the heat exchanger 61.

[0158] For example, the first part 531 only abuts against the heat exchanger 61.

[0159] For example, the first part 531 abuts against the heat exchanger 61 and is connected by fasteners.

[0160] For example, the second part 532 only abuts against the surface of the second beam 123b facing the high-pressure box 3.

[0161] For example, the second part 532 abuts against the surface of the second beam 123b facing the high-pressure housing 3 and is connected by fasteners.

[0162] For example, the connection method between the third part 533 and the surface of the second beam 123b facing away from the heat exchanger 61 may include, but is not limited to, adhesive bonding or fastener connection.

[0163] For example, fasteners may include, but are not limited to, bolts, nuts, screws, studs, washers, retaining rings, rivets, and weld studs.

[0164] For example, the second connector 53 is a one-piece molded structure.

[0165] Thus, through the multi-segment structure of the second connector 53, a large-area contact and connection with the heat exchanger 61 and the second beam 123b is achieved, which enhances the reliability of the connection between the second connector 53 and the second beam 123b, and also facilitates the transfer and dissipation of heat.

[0166] In some embodiments, such as Figure 5 and Figure 6 As shown, the mounting base 51 has a heat dissipation through hole 513 extending along the third direction Z. When projected along the third direction Z, the orthographic projection of the first fuse 41a and the orthographic projection of the heat dissipation through hole 513 have an overlapping portion.

[0167] For example, the heat dissipation hole 513 can be a round hole, a polygonal hole, or an irregular hole. The polygonal hole can be a triangular hole, a quadrilateral hole, or other shaped holes.

[0168] It is understood that the number of heat dissipation holes 513 can be one, two, three, or more, and no specific limitation is made here. For example, as shown... Figure 6 As shown, the mounting base 51 has four heat dissipation through holes 513 arranged at equal intervals along the first direction X. The heat dissipation through holes 513 are elongated and their length direction is consistent with the second direction Y.

[0169] Thus, by providing a heat dissipation through hole 513 in the mounting base 51 and matching its position with that of the first fuse 41a, it helps to improve the heat dissipation efficiency of the first fuse 41a, reduce its operating temperature, thereby extending its service life and improving the reliability of the battery device 100.

[0170] In some embodiments, such as Figure 5 and Figure 6 As shown, the mounting base 51 includes a base portion 511 and a mounting protrusion 512 protruding from the side of the base portion 511 facing away from the heat exchanger 61. The base portion 511 is connected to the first connector 52 and the second connector 53. The first fuse 41a is mounted on the side of the mounting protrusion 512 facing away from the heat exchanger 61.

[0171] For example, a mounting protrusion 512 is provided at the center of the base portion 511 along the second direction Y, and a first connecting hole 5141 extending along the third direction Z is provided at both ends of the base portion 511 beyond the mounting protrusion 512 along the second direction Y. The first connecting hole 5141 at one end of the base portion 511 is connected to the first connector 52 by a first fastener 54, and the first connecting hole 5141 at the other end of the base portion 511 is connected to the second connector 53 by another first fastener 54.

[0172] For example, the portions of the base portion 511 extending beyond the mounting protrusion 512 along the second direction Y are each fitted with a first metal sleeve 514, and the holes in the first metal sleeve 514 are first connecting holes 5141. The first connecting hole 5141 can be a smooth hole or a threaded hole.

[0173] For example, the end face of the mounting protrusion 512 facing away from the base portion 511 has a limiting protrusion 5121 at both ends along the second direction Y, and the first fuse 41a is limited between the limiting protrusions 5121.

[0174] For example, two limiting protrusions 5121 are provided at the same end of the mounting protrusion 512 facing away from the base portion 511 along the second direction Y. A wiring groove is formed between the two limiting protrusions 5121 arranged at intervals along the first direction X. The wiring groove is used for the high voltage wire harness 43 to pass through.

[0175] For example, such as Figures 5 to 7 As shown, a second connecting hole 5151 is provided on one end face of the mounting protrusion 512 facing away from the base portion 511. The connecting terminal 411 of the first fuse 41a is connected to the second connecting hole 5151 through a second fastener 55, thereby achieving a fixed connection of the first fuse 41a on the mounting protrusion 512. Specifically, as shown... Figure 8 As shown, the connection terminal 411 of the first fuse 41a has a third connection hole 4111, and the second fastener 55 passes through the third connection hole 4111 and enters the second connection hole 5151 and is connected to the second connection hole 5151.

[0176] For example, the heat dissipation through hole 513 is installed through the protrusion 512 and the base part 511 along the third direction Z. The heat dissipation through hole 513 is provided with a second connection hole 5151 on each of the opposite sides along the second direction Y. The two connection terminals 411 of the first fuse 41a are connected to the two second connection holes 5151 respectively through the second fastener 55.

[0177] For example, a second metal sleeve 515 is embedded at both ends of the end face of the mounting protrusion 512 facing away from the base portion 511 along the second direction Y. The hole of the second metal sleeve 515 is a second connecting hole 5151. The two connecting terminals 411 of the first fuse 41a are each connected to the second connecting holes 5151 of the two second metal sleeves 515 respectively through a second fastener 55. The second connecting hole 5151 can be a threaded hole or a smooth hole.

[0178] Thus, by installing the protrusion 512, the precise controllability of the installation position of the first fuse 41a is improved, and the potential thermal conduction interference caused by its direct contact with the heat exchanger 61 is reduced, thereby improving the reliability of the battery device 100. Moreover, the protrusion 512 protrudes relative to the base portion 511, so that the connection positions of the base portion 511 with the first connector 52 and the second connector 53 in the third direction Z are staggered with the connection position of the protrusion 512 with the first fuse 41a, reducing mutual interference between the two connection operations, and also facilitating the routing of the high-voltage wiring harness 43 connected to the first fuse 41a.

[0179] In some embodiments, the first connector 52 and / or the second connector 53 are metal sheets.

[0180] For example, the metal sheet can be, but is not limited to, copper sheet, aluminum sheet, aluminum alloy sheet, stainless steel sheet, etc.

[0181] For example, the first connector 52 and / or the second connector 53 are made of aluminum alloy 6061-T6 and are anodized.

[0182] By using metal sheets for the first connector 52 and / or the second connector 53, the rigidity and strength of the first connector 52 and / or the second connector 53 are improved, the reliability of the mounting base 51 is enhanced, and the metal sheets can improve thermal conductivity.

[0183] In some embodiments, the mounting base 51 is an insulating base.

[0184] For example, the insulating base may be made of, but is not limited to, resin, rubber, plastic or epoxy resin fiberglass.

[0185] Using an insulating base as the mounting base 51 helps reduce safety hazards caused by electrical short circuits and improves the electrical reliability of the battery device 100.

[0186] In some embodiments, such as Figure 9 As shown, the battery device 100 also includes an insulating protective cover 7, which is installed inside the high-voltage box receiving cavity 20 and covers the outside of the first fuse 41a.

[0187] The insulating protective cover 7 is a non-conductive material shell used to cover the outside of the first fuse 41a. Its purpose is to provide additional electrical insulation protection and reduce the impact of the external environment (such as moisture and dust) on the normal operation of the first fuse 41a.

[0188] For example, the insulating protective cover 7 covers the outside of the first fuse 41a and the mounting base 51, and the insulating protective cover 7 is connected to the first connector 52 and the second connector 53 by fasteners.

[0189] Thus, by setting up the insulating protective cover 7, the mounting base 51 and the first fuse 41a are given additional protection, reducing the intrusion of external foreign objects or accidental contact by personnel, thereby improving the reliability of the battery device 100.

[0190] In some embodiments, such as Figure 9 As shown, the insulating protective cover 7 has clearance holes 711 formed at both ends along the second direction Y, and the high-voltage wire harness 43 electrically connected to the first fuse 41a passes through the clearance holes 711.

[0191] In some embodiments, such as Figure 9 As shown, the insulating protective cover 7 includes a cover body 71 and a mounting flange 72 connected to the cover body 71. The cover body 71 covers the outside of the first fuse 41a, and both ends of the cover body 71 along the second direction Y are formed with clearance holes 711. The mounting flange 72 is connected to one end edge of the cover body 71 along the first direction X and extends toward the side away from the cover body 71. The mounting flange 72 is connected to the first connector 52 and / or the second connector 53 by fasteners.

[0192] For example, the insulating protective cover 7 is a one-piece molded structure.

[0193] In some embodiments, such as Figure 5 As shown, the multiple electrical components 41 also include a high-voltage output connector (not shown in the figure). The high-voltage output connector is installed on the wall of the battery box 1. The arrangement direction of the two connection terminals 411 of the first fuse 41a is consistent with the second direction Y. One connection terminal 411 of the first fuse 41a that is closer to the high-voltage box 3 is electrically connected to the part of the multiple electrical components 41 that is housed in the accommodating cavity. The other connection terminal 411 is electrically connected to the high-voltage output connector.

[0194] It is understood that the two connection terminals 411 of the first fuse 41a are its input and output terminals, respectively. For example, both connection terminals 411 are silver-plated copper terminals with a contact resistance of <0.1mΩ.

[0195] For example, such as Figure 5 and Figure 6As shown, a connection terminal 411 of the first fuse 41a that is closer to the high-voltage housing 3 is electrically connected to a portion of the plurality of electrical components 41 housed within the accommodating cavity via a first high-voltage wiring harness 43a. One end of the first high-voltage wiring harness 43a is connected to a second connection hole 5151 of the mounting base 51 via the same second fastener 55 to a connection terminal 411 of the first fuse 41a.

[0196] This configuration helps reduce the length of the connection path and the space occupied, while improving the stability and reliability of the connection.

[0197] In some embodiments, such as Figure 5 As shown, the battery device 100 also includes an electrical connector 9, which includes a first connecting part 91, a second connecting part 92 and a third connecting part 93. The second connecting part 92 and the third connecting part 93 are respectively connected to the first connecting part 91. The first connecting part 91 is connected to the connecting terminal 411 of the first fuse 41a away from the high voltage box. The second connecting part 92 is electrically connected to the high voltage output connector. The third connecting part 93 serves as a voltage sampling point.

[0198] For example, such as Figure 5 and Figure 6 As shown, the first connecting part 91 of the electrical connector 9 and a connecting terminal 411 of the first fuse 41a away from the high voltage box 3 are connected to another second connecting hole 5151 of the mounting base 51 by the same second fastener 55.

[0199] For example, the electrical connector 9 is a one-piece molded structure.

[0200] Thus, by connecting the first fuse 41a through the first connecting part 91, electrically connecting the first fuse 41a through the second connecting part 92, and collecting voltage through the third connecting part 93, the remote control and monitoring function of the first fuse 41a is realized, which helps to grasp the working status of the first fuse 41a in real time, detect potential faults in a timely manner, and take countermeasures.

[0201] In some embodiments, the battery device 100 further includes a battery management unit (BMU), which is disposed within the high-voltage box cavity 20 and located outside the high-voltage box body 3. The battery management unit is electrically connected to a plurality of battery cells 2, and the third connection portion 93 of the electrical connector 9 is electrically connected to the battery management unit.

[0202] Thus, by connecting the battery management unit to the third connection part 93 of the electrical connector 9, real-time acquisition and processing of the voltage state of the first fuse 41a is achieved, which helps to improve the intelligent management level of the battery device 100.

[0203] In some embodiments, such asFigure 10 and Figure 11 As shown, a carrier 33 is provided in the accommodating cavity. The carrier 33 divides the accommodating cavity into a high-voltage zone and a low-voltage zone arranged along the third direction Z. The third direction Z intersects with both the first direction X and the second direction Y. The portion of the multiple electrical components 41 that is accommodated in the accommodating cavity includes at least one high-voltage electrical component and at least one low-voltage electrical component. The high-voltage electrical component is installed on the side of the carrier 33 facing the high-voltage zone, and the low-voltage electrical component is installed on the side of the carrier 33 facing the low-voltage zone.

[0204] For example, the high-voltage housing 3 includes a first housing 31 and a second housing 32 that are fastened together along the third direction Z. The first housing 31 and the second housing 32 form a receiving cavity. The carrier 33 is connected to the first housing 31 and / or the second housing 32, dividing the receiving cavity into two regions arranged along the third direction Z. The two regions are a high-voltage region and a low-voltage region, respectively.

[0205] For example, such as Figure 11 As shown, at least one high-voltage electrical component includes a pre-charge relay 41b, a pre-charge resistor 41c, a main positive relay 41d, a Hall sensor 41e, a second fuse 41f, a third fuse 41g, and a fourth fuse 41h. Adjacent high-voltage electrical components are electrically connected via copper busbars 42 along the circuit path. The Hall sensor 41e, pre-charge resistor 41c, and pre-charge relay 41b are connected in series. The main positive relay 41d is connected in parallel to the pre-charge resistor 41c and the pre-charge relay 41b. The end of the main positive relay 41d furthest from the Hall sensor 41e is connected to four branch lines. These four branch lines are respectively connected to the first fuse 41a, the second fuse 41f, the third fuse 41g, and the fourth fuse 41h. Each of the first fuse 41a, the second fuse 41f, the third fuse 41g, and the fourth fuse 41h is connected to a high-voltage output connector. The four high-voltage output connectors are respectively installed at different locations on the wall of the battery box 1.

[0206] For example, at least one low-voltage electrical component includes a pressure sensor. Multiple low-voltage wiring harnesses are also arranged in the low-voltage area.

[0207] In this way, the accommodating cavity is divided into a high-voltage zone and a low-voltage zone by the carrier 33, realizing the physical isolation of high and low voltage electrical components, which helps to improve the electrical safety and operational stability of the battery device 100.

[0208] In some embodiments, the high-voltage zone is provided with a plurality of high-voltage electrical components, at least a portion of which are arranged along a first direction X, and / or at least a portion of which are arranged along a second direction Y.

[0209] Thus, by arranging the high-voltage electrical components along the first direction X and / or the second direction Y, the probability of stacking the high-voltage electrical components can be reduced, allowing for a reasonable arrangement of the high-voltage electrical components. The layout can be flexibly adjusted according to actual needs, improving space utilization and also helping to optimize the heat dissipation path.

[0210] A second aspect of this application provides an energy storage device that includes a plurality of battery devices 100 provided in the first aspect, the battery devices 100 being used to store or provide electrical energy.

[0211] Since the energy storage device includes the battery device 100, the energy storage device has all the beneficial effects of the battery device 100 because the energy storage device has a low short-circuit risk.

[0212] A third aspect of this application provides an electrical device that includes a plurality of battery devices 100 provided in the first aspect, the battery devices 100 being used to store or provide electrical energy.

[0213] Because the electrical device includes the battery device 100, it has all the beneficial effects of the battery device 100, because the electrical device has a low risk of short circuit.

[0214] The following describes specific examples of some embodiments of this application with reference to the accompanying drawings.

[0215] As a specific example, a battery pack (battery device 100) is provided. The battery box 1 of the battery pack has a battery receiving cavity 10 and a high-voltage box receiving cavity 20 arranged along a first direction X. A first beam 123a separates the battery receiving cavity 10 and the high-voltage box receiving cavity 20. A high-voltage box body 3 is disposed close to the cavity wall of one end of the high-voltage box receiving cavity 20 along a second direction Y. A first fuse 41a is disposed on the side of the high-voltage box body 3 facing the other end, close to the first beam 123a. The high-voltage box body 3 has a high-voltage zone and a low-voltage zone arranged along a third direction Z. A support member 33 separates the high-voltage zone and the low-voltage zone. The side of the support member 33 facing the high-voltage zone is equipped with... The high-voltage box 3 is equipped with a pre-charge relay 41b, a pre-charge resistor 41c, a main positive relay 41d, a Hall sensor 41e, a second fuse 41f, a third fuse 41g, and a fourth fuse 41h. In the high-voltage zone of the high-voltage box 3, near the first beam 123a, the pre-charge resistor 41c, the main positive relay 41d, and the Hall sensor 41e are arranged sequentially along the second direction Y away from the first fuse 41a. In the high-voltage zone of the high-voltage box 3, away from the first beam 123a, the second fuse 41f, the third fuse 41g, and the fourth fuse 41h are arranged sequentially along the second direction Y away from the first fuse 41a. Hall sensor 41e, pre-charge resistor 41c, and pre-charge relay 41b are connected in series via copper busbar 42. Main positive relay 41d is connected in parallel to pre-charge resistor 41c and pre-charge relay 41b via copper busbar 42. The end of main positive relay 41d furthest from Hall sensor 41e is connected to four branch lines. Each of the four branch lines is connected to a first fuse 41a, a second fuse 41f, a third fuse 41g, and a fourth fuse 41h via high-voltage wiring harness 43. Each of the first fuse 41a, second fuse 41f, third fuse 41g, and fourth fuse 41h is connected to a high-voltage output connector via high-voltage wiring harness 43. The four high-voltage output connectors are installed at different locations on the wall of battery box 1. The minimum distance between main positive relay 41d and high-voltage housing 3 is 16mm. The isolation groove between the high-voltage and low-voltage areas is 5mm wide and 3mm deep, and is filled with silicone rubber. The high-voltage wiring harness 43 connecting the first fuse 41a and the main positive relay 41d has a wire diameter greater than or equal to 16mm², meeting the 300A current carrying capacity requirement. This high-voltage wiring harness 43 is a high-voltage shielded harness with an aluminum foil braided shielding layer to improve electromagnetic interference resistance. A wiring groove is formed in the wall of the battery box 1, and at least a portion of the high-voltage wiring harness 43 is confined within this groove. The high-voltage wiring harness 43 is fitted with a ceramicized silicone sheath at its bending points, with a temperature resistance of 1000℃. The high-voltage wiring harness 43 is secured every 150mm along its straight sections with nylon cable ties. An insulating protective cover 7 covers the outer side of the first fuse 41a, and the distance from the inner wall of the insulating protective cover 7 to the pin of the first fuse 41a is greater than or equal to 10mm.

[0216] The assembly steps for the internal components of the high-voltage box receiving cavity 20 of the battery device 100 are as follows:

[0217] First, install the first connector 52, the second connector 53 and the mounting base 51. Next, install the first fuse 41a on the mounting base 51 and connect the high-voltage wiring harness 43. Then, install the electrical components 41 inside the high-voltage box 3. After that, lay and plug in the wiring harness. Finally, perform an overall airtightness test.

[0218] By placing the first fuse 41a externally, the electrical components 41 inside the high-voltage box 3 are transformed from a three-dimensional stack to a planar layout. The independent protection of the first fuse 41a and the isolation of the high-voltage wiring harness 43 provide dual protection for high-voltage safety, and also reduce the assembly process of the high-voltage box 3.

[0219] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A battery device, characterized in that, include: Battery box; Multiple battery cells are housed within the battery box; A high-voltage housing is housed within the battery box, and the high-voltage housing has a receiving cavity. A high-voltage power distribution circuit is electrically connected to the plurality of battery cells. The high-voltage power distribution circuit includes a plurality of electrical components. Some of the plurality of electrical components are housed within the accommodating cavity. The remaining portions of the plurality of electrical components include a first fuse, which is housed within the battery box and located outside the high-voltage box.

2. The battery device according to claim 1, characterized in that, The battery box has a battery housing cavity and a high-voltage box housing cavity arranged along a first direction. The multiple battery cells are housed in the battery housing cavity, and the high-voltage box and the multiple electrical components are housed in the high-voltage box housing cavity. The first fuse and the high-voltage box are arranged along a second direction, which intersects with the first direction.

3. The battery device according to claim 2, characterized in that, The high-voltage box receiving cavity has a first end and a second end at opposite ends along the second direction, the high-voltage box body is located at the first end of the high-voltage box receiving cavity, and the first fuse is located on the side of the high-voltage box body facing the second end.

4. The battery device according to claim 2, characterized in that, A first beam separates the battery housing cavity from the high-voltage box housing cavity. The first beam is closer to the first fuse than the cavity wall of the high-voltage box housing cavity that is opposite to the first beam along the first direction.

5. The battery device according to claim 4, characterized in that, The battery device further includes a mounting assembly, through which the first fuse is mounted in the high-voltage box cavity, and the mounting assembly is connected to the first beam.

6. The battery device according to claim 5, characterized in that, The installation components include: At least one first connector is connected to the first beam, and at least a portion of the first connector extends along the first direction toward a side opposite to the battery receiving cavity; The mounting base is connected to the first connector, and the first fuse is mounted on the mounting base.

7. The battery device according to claim 6, characterized in that, The high-voltage box receiving cavity is provided with a second beam, and the two ends of the second beam are respectively connected to the first beam and the cavity wall of the high-voltage box receiving cavity that is opposite to the first beam along the first direction. The mounting assembly further includes at least one second connector connected to the second beam, at least a portion of the second connector extending toward the high-voltage housing in the second direction and connected to the mounting base.

8. The battery device according to claim 7, characterized in that, The mounting assembly further includes at least two first fasteners, and each of the opposite ends of the mounting base is connected to the first connector and the second connector respectively by at least one of the first fasteners.

9. The battery device according to claim 7, characterized in that, A heat exchanger is connected to the cavity wall at one end of the high-pressure box receiving cavity along a third direction. This third direction intersects both the first and second directions. The second beam is located on the side of the heat exchanger facing away from the cavity wall. Both the first connector and the second connector abut against the surface of the heat exchanger facing away from the cavity wall, and the mounting base is connected to the side of the first connector and the second connector facing away from the heat exchanger.

10. The battery device according to claim 9, characterized in that, The second connector includes a first part, a second part, and a third part. The second part extends along the third direction and its two ends are respectively connected to the first part and the third part. The first part and the third part are respectively disposed on opposite sides of the second part along the second direction. The first part abuts against the heat exchanger, the second part abuts against the surface of the second beam facing the high-pressure box, and the third part is connected to the surface of the second beam facing away from the heat exchanger.

11. The battery device according to claim 9, characterized in that, The mounting base has a heat dissipation through hole extending along the third direction. When projected along the third direction, the orthographic projection of the first fuse and the orthographic projection of the heat dissipation through hole have an overlapping portion.

12. The battery device according to claim 9, characterized in that, The mounting base includes a base portion and a mounting protrusion protruding from the base portion on the side opposite to the heat exchanger. The base portion is connected to the first connector and the second connector. The first fuse is mounted on the mounting protrusion on the side opposite to the heat exchanger.

13. The battery device according to any one of claims 7 to 12, characterized in that, The first connector and / or the second connector are metal sheets; The mounting base is an insulated base.

14. The battery device according to any one of claims 6 to 12, characterized in that, The battery device also includes an insulating protective cover, which is installed inside the high-voltage box cavity and covers the outside of the first fuse.

15. The battery device according to any one of claims 2 to 12, characterized in that, The plurality of electrical components also include a high-voltage output connector, which is mounted on the wall of the battery box. The arrangement direction of the two connection terminals of the first fuse is consistent with the second direction. One of the connection terminals of the first fuse, which is closer to the high-voltage housing, is electrically connected to the portion of the plurality of electrical components housed in the accommodating cavity, and the other connection terminal is electrically connected to the high-voltage output connector.

16. The battery device according to claim 15, characterized in that, The battery device further includes an electrical connector, which includes a first connection part, a second connection part, and a third connection part. The second connection part and the third connection part are respectively connected to the first connection part. The first connection part is connected to the connection terminal of the first fuse away from the high voltage box. The second connection part is electrically connected to the high voltage output connector. The third connection part serves as a voltage sampling point.

17. The battery device according to claim 16, characterized in that, The battery device further includes a battery management unit, which is disposed inside the high-voltage box cavity and located outside the high-voltage box. The battery management unit is electrically connected to the plurality of individual battery cells, and the third connection part is electrically connected to the battery management unit.

18. The battery device according to any one of claims 2 to 12, 16, and 17, characterized in that, The accommodating cavity is provided with a support member, which divides the accommodating cavity into a high-pressure zone and a low-pressure zone arranged along a third direction. This third direction intersects both the first direction and the second direction. The portion of the plurality of electrical components housed within the accommodating cavity includes at least one high-voltage electrical component and at least one low-voltage electrical component. The high-voltage electrical component is mounted on the side of the carrier facing the high-voltage area, and the low-voltage electrical component is mounted on the side of the carrier facing the low-voltage area.

19. The battery device according to claim 18, characterized in that, The high-voltage zone is provided with a plurality of high-voltage electrical components, at least a portion of which are arranged along the first direction, and / or at least a portion of which are arranged along the second direction.

20. An energy storage device, characterized in that, The energy storage device includes a plurality of battery devices as described in any one of claims 1 to 19, the battery devices being used to store or provide electrical energy.

21. An electrical appliance, characterized in that, The electrical device includes a plurality of battery devices as described in any one of claims 1 to 19, the battery devices being used to store or provide electrical energy.

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