Battery device, power utilization device and energy storage device

Abstract

The invention provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises stacked battery units, each battery unit comprises a box body and a battery monomer, the battery monomer is arranged in a containing cavity of the box body, all the box bodies are stacked to form a box body assembly, and a wire passing hole communicated with the containing cavity is formed in the box wall of the box body assembly; the battery device further comprises a connector, a high-voltage distribution box, a first connecting wire harness and a second connecting wire harness; the connector is arranged on the box body assembly in a penetrating manner and is electrically connected with the battery monomers; the high-voltage distribution box is arranged on the outer wall of the box body assembly, and the high-voltage distribution box and the connector are located on box walls on different sides of the box body assembly respectively; one end of the first connecting wire harness is electrically connected with a functional device in the high-voltage distribution box, and the other end is led into the accommodating cavity through the wire hole and is electrically connected with the battery monomer; one end of the second connecting wire harness is electrically connected with the functional device in the high-voltage distribution box, and the other end is led into the accommodating cavity through the wire hole and is electrically connected with the connector.

Description

TECHNICAL FIELD

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

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] Generally, the battery pack is provided with battery monomers and various electrical components. The high-voltage distribution box is a control unit for distributing the energy of the battery pack, and is used for high-voltage distribution of the battery pack. With the increasing demand for the power of the battery pack, the design of the high-voltage distribution box of the existing battery pack occupies a large space inside the battery pack, resulting in low space utilization of the battery pack. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, a power utilization device and an energy storage device to improve the space utilization inside the battery device.

[0005] Embodiments of the first aspect of the present application provide a battery device, comprising at least two battery units stacked, each battery unit comprising a box body and a battery monomer, the box body comprising a receiving cavity, the battery monomer being arranged in the receiving cavity, the adjacent two battery monomers being electrically connected, the box bodies being stacked to form a box assembly, the box wall of the box assembly being provided with a wire hole communicating with the receiving cavity; the battery device further comprises a connector, a high-voltage distribution box, a first connection wire harness and a second connection wire harness; the connector is arranged on the box assembly and is electrically connected with the battery monomer; the high-voltage distribution box is arranged on the outer wall of the box assembly, and the high-voltage distribution box and the connector are respectively located on the box walls on different sides of the box assembly; one end of the first connection wire harness is electrically connected with the functional device in the high-voltage distribution box, and the other end is introduced into the receiving cavity through the wire hole and is electrically connected with the battery monomer; one end of the second connection wire harness is electrically connected with the functional device in the high-voltage distribution box, and the other end is introduced into the receiving cavity through the wire hole and is electrically connected with the connector.

[0006] In the technical solution of this application embodiment, the high-voltage distribution box is placed on the outer wall of the battery pack assembly, and the high-voltage distribution box and connector are separately and independently set on different sides of the pack assembly. The connector passes through the pack assembly wall and is electrically connected to each battery cell. The connection harnesses between the functional components in the high-voltage distribution box and the battery cells and the connectors are introduced into the receiving cavity through the wire holes on the pack wall. This realizes the overall design of the high-voltage distribution box and the battery cell, eliminating the need for additional connectors to transfer the external high-voltage distribution box to the battery cells in the receiving cavity. The external high-voltage distribution box design makes full use of the planar expansion space of the outer wall of the pack assembly, freeing up a certain space for the receiving cavity without increasing the overall volume of the battery cell, optimizing the battery distribution in the receiving cavity, significantly improving the utilization rate of the internal space of the battery cell, and thus increasing the battery capacity of the battery pack.

[0007] In some embodiments, the high-voltage distribution box and the wiring hole are located on the same side wall of the enclosure assembly, and the wiring hole is located within the outer contour of the high-voltage distribution box's orthographic projection onto the enclosure assembly. This not only reduces wiring harness bending and redundant length, and lowers the space occupied by the wiring harness, but also reduces the risk of electrical components within the wiring harness and battery device being exposed to the outside environment, improving the overall sealing and protection performance of the device.

[0008] In some embodiments, the outer contour of the high-voltage distribution box projected onto the enclosure assembly is located on at least two enclosures, and a sealing interface is formed between the high-voltage distribution box and the enclosure wall of the enclosure assembly, with the wire passage hole located within the sealing range of the sealing interface. By forming a sealing interface around the wire passage hole between the high-voltage distribution box and the enclosure assembly, the electrical connection paths between the high-voltage distribution box and the battery cells and connectors are sealed, achieving a sealing and protection effect.

[0009] In some embodiments, the wiring hole is located on the wall of any enclosure connected to the high-voltage distribution box. This eliminates the need for the wiring hole to span multiple layers, and the corresponding sealing interface can be provided for a single enclosure containing the wiring hole. Consequently, the sealing interface between the high-voltage distribution box and the enclosure assembly does not suffer from sealing problems caused by spanning different enclosures, thus resolving the sealing issue between the high-voltage distribution box and the enclosure assembly caused by dimensional differences in tolerances due to multi-layer enclosures.

[0010] In some embodiments, the high-voltage distribution box and the enclosure assembly are sealed by compression sealing. The expansion force generated by the compressed sealing element allows it to completely fill the dimensional differences at the connection between adjacent enclosures, thus solving the sealing problem between the high-voltage distribution box and the enclosure assembly caused by dimensional differences due to tolerances in multi-layer enclosures.

[0011] In some embodiments, the connector is located on the first wall of the enclosure assembly, and the high-voltage distribution box is located on the second wall of the enclosure assembly, with the first and second walls adjacent to or opposite each other. This allows for more complex spatial designs of battery devices and maximizes the use of the internal space of the battery cells to accommodate more individual battery cells, thereby increasing the battery capacity of the device.

[0012] In some embodiments, the high-voltage distribution box further includes a high-voltage distribution box cover. The high-voltage distribution box cover includes a cover body and a first flange. The first flange is located around the perimeter of the cover body and has a first mounting hole. A first fastener passes through the first mounting hole to install the high-voltage distribution box cover onto the enclosure assembly. The surface of the cover body facing the enclosure wall has a receiving groove, in which functional components are placed. Thus, there is no need for a separate bracket or support plate structure to fix the high-voltage distribution box. Instead, the installation of the high-voltage distribution box and the enclosure assembly is achieved simultaneously during the assembly of the high-voltage distribution box, simplifying the installation process and saving time and costs.

[0013] In some embodiments, the high-voltage distribution box cover and the enclosure wall of the housing assembly enclose a cavity for accommodating functional devices. Using the enclosure wall as part of the high-voltage distribution box simplifies its structure and reduces its thickness, thereby reducing its space-consuming proportion. This allows for more internal space for the battery cells within the limited space of the battery device, which is beneficial for further increasing the battery's capacity.

[0014] In some embodiments, the high-voltage distribution box further includes a first sealing element located between the first flange and the box wall of the enclosure assembly. The high-voltage distribution box cover and the box wall of the enclosure assembly form a sealing interface through the first sealing element, and the wiring hole is located within the inner contour of the orthographic projection of the first sealing element onto the enclosure assembly. This allows for simultaneous sealing of the high-voltage distribution box and the wiring hole, further reducing the risk of dust or moisture intruding into the high-voltage distribution box and battery unit, improving the overall sealing and protection performance of the device, and further reducing the risk of corrosion or short circuits in wiring harnesses and electrical components caused by environmental factors.

[0015] In some embodiments, the orthographic projection profile of the first seal on the enclosure assembly coincides with the orthographic projection profile of the first flange on the enclosure assembly. This maximizes the effective sealing interface between the high-voltage distribution box cover and the enclosure assembly, extends the sealing path from the outside to the inside of the high-voltage distribution box, and effectively improves the sealing and protection performance of the entire device.

[0016] In some embodiments, the first sealing element has second mounting holes corresponding one-to-one with the first mounting holes. A first fastener passes sequentially through the first and second mounting holes to install the high-voltage distribution box cover and the first sealing element onto the enclosure assembly, thereby compressing and sealing the first sealing element between the high-voltage distribution box cover and the enclosure wall of the enclosure assembly. This allows for synchronous installation and precise alignment of the high-voltage distribution box cover and the first sealing element, while also achieving a compression seal between the high-voltage distribution box cover and the enclosure assembly, improving the sealing effect.

[0017] In some embodiments, the high-voltage distribution box further includes a mounting bracket, through which functional components are mounted on at least one of the enclosure assembly and the box cover body. This allows for three-dimensional mounting of the functional components. Compared to the traditional high-voltage distribution box design that lays the functional components flat, this application can reduce the thickness of the high-voltage distribution box in the direction perpendicular to the adjacent enclosure wall, thereby reducing the space occupied by the high-voltage distribution box.

[0018] In some embodiments, the high-voltage distribution box further includes a high-voltage distribution box base adapted to the high-voltage distribution box cover. The high-voltage distribution box base is mounted on the enclosure assembly and includes a base body and a second flange. The second flange is located around the perimeter of the base body and has third mounting holes corresponding to the first mounting holes. A first fastener passes through the first mounting holes and the third mounting holes in sequence to mount the high-voltage distribution box cover onto the high-voltage distribution box base. The high-voltage distribution box cover and the high-voltage distribution box base together form a cavity for accommodating functional components. The functional components are mounted on at least one of the base body and the cover body. Since the high-voltage distribution box cover and the high-voltage distribution box base combine to form the outer shell structure of the high-voltage distribution box, the overall structural stability of the high-voltage distribution box can be improved, providing better protection for each functional component. In addition, it also enables three-dimensional mounting of each functional component of the high-voltage distribution box, reducing the thickness of the high-voltage distribution box in the direction perpendicular to the adjacent enclosure wall, thereby reducing the space ratio of the high-voltage distribution box.

[0019] In some embodiments, the base body has a through hole corresponding to the wire hole. The connecting wires are introduced into the receiving cavity from inside the high-voltage distribution box by passing through the through hole and the wire hole in sequence. In this way, the first and second connecting wires leading out from the through hole are directly introduced into the receiving cavity of the battery unit through the wire hole, eliminating the need for winding design, reducing wire bending and redundant length, reducing the space occupied by the wires, and simplifying the wire wiring design.

[0020] In some embodiments, the high-voltage distribution box further includes a second seal and a third seal. The second seal is located between the high-voltage distribution box cover and the high-voltage distribution box base, forming a sealed interface between them. The third seal is located between the high-voltage distribution box base and the box wall of the enclosure assembly, also forming a sealed interface between them. The wiring hole is located within the inner contour of the orthographic projection of the third seal onto the enclosure assembly, and the outer contour of the wiring hole is located within the inner contour of the orthographic projection of the third seal onto the enclosure assembly. The second seal achieves a seal between the high-voltage distribution box cover and the high-voltage distribution box base, while the third seal seals the wiring hole and the wiring hole, reducing the risk of external dust or moisture intruding into the high-voltage distribution box and battery unit, thus improving the overall sealing and protection performance of the device.

[0021] In some embodiments, the second seal is located between the first flange and the second flange. The second seal has a fourth mounting hole that corresponds one-to-one with the first mounting hole. The first fastener passes through the first mounting hole, the fourth mounting hole, and the third mounting hole in sequence to install the high-voltage distribution box cover and the second seal onto the high-voltage distribution box base, thereby compressing and sealing the second seal between the high-voltage distribution box cover and the high-voltage distribution box base. This allows for the synchronous installation and precise alignment of the high-voltage distribution box cover, the second seal, and the high-voltage distribution box base, while also achieving a compression seal between the high-voltage distribution box cover and the high-voltage distribution box base, simplifying the installation process.

[0022] In some embodiments, the second flange is further provided with a fifth mounting hole, which is alternately distributed with the third mounting hole. A second fastener passes through the fifth mounting hole to mount the high-voltage distribution box base onto the housing assembly. The second seal has a clearance groove corresponding to the position of the fifth mounting hole. The separate fixing of the high-voltage distribution box base provides a stable foundation for the subsequent sealing between the high-voltage distribution box cover and the high-voltage distribution box base, thereby improving the reliability of the seal between the high-voltage distribution box cover and the high-voltage distribution box base. The clearance groove design allows the second seal to tightly fit against the mounting surfaces of the first and second flanges under compression, ensuring the sealing effect of the second seal.

[0023] In some embodiments, the third seal is provided corresponding to the second flange, and the third seal has a sixth mounting hole that corresponds one-to-one with the fifth mounting hole. The second fastener passes through the fifth mounting hole and the sixth mounting hole in sequence to install the high-voltage distribution box base and the third seal onto the enclosure assembly, and to compress and seal the third seal between the high-voltage distribution box base and the enclosure wall of the enclosure assembly. In this way, the synchronous installation and precise alignment of the high-voltage distribution box base and the third seal can be achieved, and the compression seal between the high-voltage distribution box base and the enclosure assembly can also be achieved, simplifying the installation process.

[0024] In some embodiments, the outer contour of the orthographic projection of the third seal on the enclosure assembly coincides with the outer contour of the orthographic projection of the high-voltage distribution box base on the enclosure assembly. This allows for sealing of the entire high-voltage distribution box base, flexible placement of wiring holes and through holes, and avoids material redundancy due to an excessively large third seal or sealing blind spots due to an excessively small third seal.

[0025] In some embodiments, at least a portion of the outer contour of the orthographic projection of the third seal onto the housing assembly lies within the outer contour of the orthographic projection of the base body onto the housing assembly. This allows for a suitable reduction in the size of the third seal, which only needs to simultaneously seal both the wire-passing hole and the wire-through hole, saving costs and making the third seal suitable for various models and specifications.

[0026] In some embodiments, the base body has a seventh mounting hole corresponding to the third sealing element, and the third sealing element has an eighth mounting hole corresponding to the seventh mounting hole. A third fastener passes sequentially through the seventh and eighth mounting holes to install the high-voltage distribution box base and the third sealing element onto the enclosure assembly, thereby compressing and sealing the third sealing element between the high-voltage distribution box base and the enclosure wall of the enclosure assembly. This achieves a compression seal between the high-voltage distribution box and the enclosure assembly, preventing moisture or dust from entering the interior of the high-voltage distribution box and the enclosure assembly.

[0027] In some embodiments, the high-voltage distribution box is an irregularly shaped structure manufactured using a die-casting process. This satisfies more complex and demanding spatial structural requirements, enabling the battery device to adapt to more complex spatial design needs, thereby meeting the increasingly higher space utilization requirements of electrical devices for battery devices.

[0028] In some embodiments, the battery device further includes a service switch, which is located on the same side wall of the housing assembly as the connector, with the service switch and connector spaced apart. This allows the housing wall with the service switch and connector to be positioned facing an area easily accessible to maintenance personnel, facilitating convenient plugging, unplugging, and power disconnection during subsequent battery device maintenance.

[0029] An embodiment of the second aspect of this application provides an electrical device, including the battery device described in the above embodiments.

[0030] An embodiment of the third aspect of this application provides an energy storage device, including the battery device described in the above embodiments.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0032] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0033] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application; Figure 2 This is an exploded structural diagram of a battery cell according to some embodiments of this application; Figure 3 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application; Figure 4 This is a partial exploded view of the battery device provided in Embodiment 1 of this application; Figure 5 This is a partial exploded view of the battery device provided in Embodiment 2 of this application; Figure 6 This is a partial exploded view of the battery device provided in Embodiment 3 of this application.

[0034] Explanation of reference numerals in the attached figures: Box assembly 1, box 10, first part 11, second part 12, wire hole 101, tenth mounting hole 102, ninth mounting hole 103, battery cell 20, connector 30, high voltage connector 31, low voltage connector 32, high voltage distribution box 40, functional device 41, high voltage distribution box cover 42, cover body 421, first flange 422, first mounting hole 423, first fastener 43, first seal 44, second mounting hole 441, second seal 45, fourth mounting hole 451, clearance groove 452, high voltage distribution box base 46, base body 461, second flange 462, third mounting hole 4621, fifth mounting hole 4622, second fastener 47, third seal 48, sixth mounting hole 481, eighth mounting hole 482, mounting bracket 49, second connecting harness 50, maintenance switch 60, battery cell 100, controller 200, motor 300, vehicle 1000. Detailed Implementation

[0035] 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.

[0036] 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, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" 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.

[0038] 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.

[0039] 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 have an "or" relationship.

[0040] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0041] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0044] A battery pack is an assembly of multiple energy storage battery cells, each a tiny unit for storing and releasing electrical energy. This assembly of battery cells achieves energy storage and release through the connection and control of the individual cells. Within a battery pack, multiple battery cells can be connected in series, parallel, or a combination thereof. A combination of series and parallel connections refers to a configuration where multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then housed within the battery pack's casing.

[0045] With the increasing demand for battery capacity from electrical devices, battery packs consisting of at least two stacked battery packs have emerged. In these battery packs, the battery packs are stacked sequentially along the same direction (e.g., the height of the battery pack), and adjacent battery packs are rigidly connected by mechanical fasteners (such as bolts or clips) or adhesives. The battery packs exhibit a degree of functional integration; for example, they may share a unified high-voltage power distribution system, including but not limited to high-voltage distribution boxes, relays, battery management systems (BMS), fuses, and pre-charge resistors. They may also achieve electrical connections with external systems (such as motor controllers and chargers) through modular interfaces. Simultaneously, the battery packs also possess a degree of structural independence. For instance, each battery pack has an independent enclosure and individual battery cells. Each enclosure has a cavity to house the individual battery cells, which are then electrically connected to adjacent cells.

[0046] In some related technologies, the high-voltage distribution box is typically located inside the battery pack. This results in the high-voltage distribution box occupying internal space, hindering battery capacity and impacting battery power output. To address this, other related technologies have proposed a separate external high-voltage distribution box. However, this external high-voltage distribution box is generally an independent unit located outside the battery pack, connected and fixed to it by a separate bracket or support plate structure. In other words, the battery pack and the high-voltage distribution box are two independent designs. Furthermore, the external high-voltage distribution box requires an additional connector (such as a high-low voltage connector) to connect to the battery pack. This connector is usually located on the high-voltage distribution box itself, making it difficult to meet customers' design requirements for maximizing battery pack space utilization.

[0047] Based on the above considerations, this application provides a battery device, a power consumption device, and an energy storage device. The battery device includes at least two stacked battery cells. Each battery cell includes a housing and a battery cell. The housing includes a receiving cavity, and the battery cell is disposed within the receiving cavity. Adjacent battery cells are electrically connected. The housings are stacked to form a housing assembly. The housing assembly has a wire hole communicating with the receiving cavity on its wall. The battery device also includes a connector, a high-voltage distribution box, a first connecting harness, and a second connecting harness. The connector passes through the housing assembly and is electrically connected to the battery cell. The high-voltage distribution box is disposed on the outer wall of the housing assembly. The high-voltage distribution box and the connector are respectively located on different sides of the housing assembly wall. One end of the first connecting harness is electrically connected to a functional device inside the high-voltage distribution box, and the other end is introduced into the receiving cavity through a wire hole and electrically connected to the battery cell. One end of the second connecting harness is electrically connected to a functional device inside the high-voltage distribution box, and the other end is introduced into the receiving cavity through a wire hole and electrically connected to the connector.

[0048] It should be noted that the battery cell in this application can be a battery pack, or other types of battery structures with a housing and individual battery cells, such as electric vehicle battery boxes, containerized energy storage boxes, or industrial battery structures.

[0049] In the technical solution of this application embodiment, the high-voltage distribution box is placed on the outer wall of the battery device's housing assembly, and the high-voltage distribution box and connector are separately and independently set on different sides of the housing assembly's housing wall. The connector passes through the housing wall of the housing assembly and is electrically connected to each battery cell. The connection harnesses between the functional devices in the high-voltage distribution box and the battery cells and connectors are introduced into the receiving cavity through the wire holes on the housing wall. This realizes the overall design of the high-voltage distribution box and the battery device, eliminating the need for additional connectors to transfer the external high-voltage distribution box to the battery cells in the receiving cavity. The external high-voltage distribution box design can free up some space in the receiving cavity, optimize the battery distribution in the receiving cavity, improve the utilization rate of the internal space of the battery cell, and thus increase the battery capacity of the battery cell.

[0050] The battery device disclosed in this application can be used, but is not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system incorporating the battery device disclosed in this application can be used to form such an electrical device or energy storage device.

[0051] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0052] This application also provides an energy storage device that uses a battery as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0053] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0054] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The 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 electric vehicles, etc. A battery unit 100 is provided inside the vehicle 1000, and the battery unit 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery unit 100 can be used to power the vehicle 1000; for example, the battery unit 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 unit 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0055] In some embodiments of this application, the battery unit 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.

[0056] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. The battery cell 100 includes a housing 10 and a battery cell 20. The housing 10 includes a receiving cavity, within which the battery cell 20 is received. The housing 10 provides space for the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a receiving cavity for receiving the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the receiving cavity; alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the box 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0057] In the battery unit 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery unit 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. The battery unit 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0058] Each battery cell 20 can be a rechargeable battery; for example, a lithium-ion battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0059] Please refer to Figures 2-6 , Figure 2 This is an exploded view of a battery cell provided in some embodiments of this application. Figure 3 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application. Figure 4 This is a partial exploded view of the battery device provided in Embodiment 1 of this application. Figure 5 This is a partial exploded view of the battery device provided in Embodiment 2 of this application. Figure 6 This is a partial exploded view of the battery device provided in Embodiment 3 of this application.

[0060] like Figures 2-6 This application provides a battery device, which includes at least two stacked battery units 100. Each battery unit 100 includes a housing 10 and a battery cell 20. The housing 10 includes a receiving cavity, and the battery cell 20 is disposed in the receiving cavity. Two adjacent battery cells 20 are electrically connected. The housings 10 are stacked to form a housing assembly 1. The housing wall of the housing assembly 1 is provided with a wire hole 101 communicating with the receiving cavity.

[0061] The battery assembly also includes a connector 30, a high-voltage distribution box 40, a first connecting harness (not shown), and a second connecting harness 50. The connector 30 is mounted on the housing assembly 1 and is electrically connected to the battery cell 20. The high-voltage distribution box 40 is located on the outer wall of the housing assembly 1, and the high-voltage distribution box 40 and the connector 30 are located on different sides of the housing assembly 1. One end of the first connecting harness is electrically connected to the functional device 41 inside the high-voltage distribution box 40, and the other end is introduced into the receiving cavity through the wire hole 101 and electrically connected to the battery cell 20. One end of the second connecting harness 50 is electrically connected to the functional device 41 inside the high-voltage distribution box 40, and the other end is introduced into the receiving cavity through the wire hole 101 and electrically connected to the connector 30.

[0062] The enclosure assembly 1 refers to a rigid assembly formed by structural integration of at least two stacked enclosures 10, with adjacent enclosures 10 rigidly connected by mechanical fasteners (such as bolts or clips) or adhesives. Stacking means that the enclosures 10 are stacked sequentially along the same direction (e.g., the height direction). For ease of explanation, the figures in this application only illustrate an enclosure assembly 1 formed by stacking three enclosures 10 sequentially along the height direction. Of course, in other embodiments of this application, the enclosure assembly 1 can also be formed by stacking two, four, or more enclosures 10, depending on actual needs.

[0063] The wire through hole 101 refers to a through-hole structure provided on the wall of the enclosure assembly 1, used to realize the electrical connection of electrical components (such as battery cells, relays, BMS) inside and outside the enclosure assembly 1. The hole diameter is designed according to the specifications of the wire harness. In this application, the wire through hole 101 can be located in any area of ​​the enclosure assembly 1 except for the area where the connector 30 is located, as long as it can lead the first connection wire harness and the second connection wire harness 50 used to connect the functional device 41 in the high-voltage distribution box 40 into the interior of the enclosure assembly 1.

[0064] Connector 30 refers to the electrical interface device installed on the battery pack housing assembly 1, including a high-voltage connector 31 and a low-voltage connector 32. The high-voltage connector 31 is used to transmit high-voltage DC power from the individual battery cells 20 to the motor controller and charger, while the low-voltage connector 32 is used to transmit CAN bus signals between the BMS and the vehicle controller. The high-voltage connector 31 and the low-voltage connector 32 are centrally located on the same side wall of the housing assembly 1, with a center-to-center distance ≥80mm to avoid high-voltage arc interference. The high-voltage connector 31 and the low-voltage connector 32 are suitable for quick docking of the battery pack with external systems and support hot-swappable maintenance.

[0065] The high-voltage distribution box 40 refers to the electrical control device integrated on the battery pack assembly 1. It includes, but is not limited to, core functional components such as the main positive relay, main negative relay, precharge relay, fuse, precharge resistor, current sensor, and BMS. The high-voltage distribution box 40 is used to realize the main circuit on / off control, overcurrent protection, and precharge function of the battery cell 20.

[0066] The first connecting harness refers to the wire assembly used for the electrical connection between the high-voltage distribution box 40 and the battery cell 20. The functional devices 41 in the high-voltage distribution box 40 are electrically connected to the battery cell 20 through the first connecting harness to realize the signal transmission between each functional device 41 and the battery cell 20.

[0067] The second connecting harness 50 refers to the wire assembly used for electrical connection between the high-voltage distribution box 40 and the connector 30. The functional device 41 in the high-voltage distribution box 40 is electrically connected to the connector 30 through the second connecting harness 50 to realize signal transmission between the battery device and the external system.

[0068] It should be noted that in the battery device provided in this application, at least two stacked battery cells 100 share a unified high-voltage power distribution system and a wire hole 101. The high-voltage power distribution system includes the high-voltage power distribution box 40 as described above, the functional devices 41 inside the high-voltage power distribution box 40, the first connecting wire harness, and the second connecting wire harness 50.

[0069] In the technical solution of this application embodiment, the high-voltage distribution box 40 is placed on the outer wall of the battery device housing assembly 1, and the high-voltage distribution box 40 and the connector 30 are separately and independently arranged on different sides of the housing assembly 1. The connector 30 passes through the housing wall of the housing assembly 1 and is electrically connected to each battery cell 20. The high-voltage distribution box 40 and the battery cell 20 are electrically connected through a first connecting wire harness introduced into the receiving cavity through the wire hole 101 on the housing wall. The high-voltage distribution box 40 and the connector 30 are electrically connected through a second connecting wire harness 50 through the wire hole 101 on the housing wall. The hole 101 is introduced into the cavity to realize the electrical connection between the high voltage distribution box 40 and the connector 30, thereby realizing the overall design of the high voltage distribution box 40 and the battery unit 100. No additional connector is needed to transfer the external high voltage distribution box 40 to the battery cell 20 in the cavity. The design of the external high voltage distribution box 40 makes full use of the planar expansion space of the outer wall of the housing assembly 1. Without increasing the overall volume of the battery unit 100, it frees up a certain space for the cavity, optimizes the battery distribution in the cavity, significantly improves the utilization rate of the internal space of the battery unit 100, and thus increases the battery capacity of the battery device.

[0070] According to some embodiments of this application, such as Figures 3-6As shown, the high-voltage distribution box 40 and the wire hole 101 are located on the same side of the box wall of the box assembly 1, and the wire hole 101 is located within the outer contour of the orthographic projection of the high-voltage distribution box 40 on the box assembly 1.

[0071] Orthographic projection is a special form of parallel projection, referring to the projection of an object onto the projection plane when the projection lines are perpendicular to the projection plane. In parallel projection, if the projection lines are always perpendicular to the projection plane, it is called orthographic projection. For example, when one face of a cube is parallel to the projection plane, its orthographic projection is completely consistent with its true shape. In this application, the projection plane is the box wall on the side of the box assembly 1 where the high-voltage distribution box 40 is located. The orthographic projection of the high-voltage distribution box 40 on the box assembly 1 refers to the closed shape formed by the high-voltage distribution box 40 projected onto the box wall on the side of the box assembly 1 where the high-voltage distribution box 40 is located along a direction perpendicular to the box assembly 1. This closed shape has an outer contour.

[0072] By placing the wiring hole 101 within the outer contour of the orthographic projection of the high-voltage distribution box 40 on the enclosure assembly 1, the wiring path between the high-voltage distribution box 40, the battery cell 20, and the connector 30 can be shortened, reducing wire harness bending and redundant length, reducing the space occupied by the wire harness, and simplifying the wire harness wiring design. In addition, placing the wiring hole 101 within the outer contour of the orthographic projection of the high-voltage distribution box 40 on the enclosure assembly 1 can also ensure the sealing of the battery device. Compared with the exposed wiring hole 101 design, the solution of covering the wiring hole 101 with the high-voltage distribution box 40 can reduce the risk of the wiring harness and electrical components inside the battery device being exposed to the outside world, improve the sealing and protection performance of the entire device, and reduce the risk of corrosion or short circuit of the wiring harness and electrical components caused by mechanical wear or environmental factors (such as dust and moisture).

[0073] like Figures 2-6 As shown, in a battery device formed by stacking at least two layers of battery cells 100, the high-voltage distribution box 40 generally requires a relatively large size, causing it to extend beyond a single-layer enclosure 10 and form a cross-layer installation. That is, the outer contour of the high-voltage distribution box 40's orthographic projection on the enclosure assembly 1 lies on at least two enclosures 10. Due to assembly tolerances between the multiple enclosures 10 and manufacturing tolerances inherent in the enclosures 10 themselves, the sealing performance between the cross-layer high-voltage distribution box 40 and the enclosure assembly 1 is poor, affecting the battery device's lifespan. Therefore, in some embodiments of this application, a sealing interface is formed between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1, with the wire hole 101 located within the sealing range of this interface.

[0074] A sealed interface refers to a contact surface formed by two or more mechanical components through a specific structure and materials. Its core function is to block the leakage path of fluids (gas, liquid) or solid particles, thereby isolating the internal and external environments. In this application, the sealed interface refers to the sealed contact surface formed between the high-voltage distribution box 40 and the box wall of the enclosure assembly 1 through a sealant or adhesive. This sealed contact surface can prevent gases, liquids, or particles from the external environment from entering the interior of the high-voltage distribution box 40 and the enclosure assembly 1 through the gap between the high-voltage distribution box 40 and the box wall of the enclosure assembly 1.

[0075] The sealing components include, but are not limited to, elastic sealing rings (such as rubber or polyurethane sealing rings), elastic sealing gaskets (such as rubber or polyurethane sealing gaskets), or metal gasket structures, to achieve a sealed connection between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1.

[0076] The adhesive includes, but is not limited to, at least one of silicone adhesive, polyurethane adhesive and epoxy resin adhesive, to achieve a sealed connection between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1.

[0077] By forming a sealed interface between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1, and by placing the wire passage hole 101 within the sealed area of ​​the sealed interface, both the high-voltage distribution box 40 and the interior of the enclosure assembly 1 form a sealed space. The first connecting wire harness and the second connecting wire harness 50 are introduced directly into the enclosure assembly 1 from the interior of the high-voltage distribution box 40 through the wire passage hole 101, thereby sealing the electrical connection paths between the high-voltage distribution box 40 and the battery cell 20 and the connector 30, respectively, achieving a sealing and protection effect.

[0078] According to some embodiments of this application, such as Figures 2-6 As shown, the wire hole 101 is located on the wall of any enclosure 10 connected to the high-voltage distribution box 40, and the wire hole 101 is located within the sealing range of the sealing interface.

[0079] It is understandable that "on any box 10" refers to the cable hole 101 being located on the box wall of one of the boxes 10 connected to the high-voltage distribution box 40. In other words, the cable hole 101 is not located at the junction of two adjacent boxes 10, and there is no cross-layer setting.

[0080] Since the wire hole 101 is located on the wall of one of the enclosures 10 connected to the high-voltage distribution box 40, it does not need to be set across layers. Therefore, in some embodiments of this application, the sealing interface between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1 can also be set corresponding to the single enclosure 10 with the wire hole 101. That is, the outer contour of the sealing interface in the direction perpendicular to the enclosure wall of the enclosure assembly 1 is located on the enclosure 10 with the wire hole 101. In this way, there is no sealing problem caused by crossing different enclosures. The fixing of the high-voltage distribution box 40 and the enclosure assembly 1 does not need to consider the sealing. The fixing points of the high-voltage distribution box 40 and the enclosure assembly 1 can be randomly set on the periphery of the sealing interface as needed. This solves the sealing problem between the high-voltage distribution box 40 and the enclosure assembly 1 caused by the dimensional differences in tolerance of the multi-layer enclosures 10.

[0081] According to some embodiments of this application, such as Figures 3-6 As shown, the high-voltage distribution box 40 and the box wall of the enclosure assembly 1 are sealed by a compression seal.

[0082] A seal is a component or material used to prevent fluid or solid particles from leaking between adjacent mating surfaces and to prevent external impurities (such as dust, moisture, etc.) from entering the interior of mechanical equipment. In this application, seals include, but are not limited to, elastic sealing rings (such as rubber or polyurethane sealing rings) or elastic sealing gaskets (such as rubber or polyurethane sealing gaskets).

[0083] Compression sealing refers to a sealing method that uses external force to cause the sealing material to undergo elastic deformation, thereby filling the gap between the mating surfaces and forming continuous contact pressure to block the leakage of fluids (gas, liquid) or solid particles. In this application, the seal located between the high-voltage distribution box 40 and the enclosure assembly 1 is compressed during installation, forming continuous contact pressure between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1, thus achieving a compression seal between the high-voltage distribution box 40 and the enclosure wall of the enclosure assembly 1.

[0084] Since the high-voltage distribution box 40 and the enclosure assembly 1 are sealed by a compression seal, the expansion force generated after the seal is compressed allows the seal to completely fill the dimensional difference at the connection between adjacent enclosures, thereby solving the sealing problem between the high-voltage distribution box 40 and the enclosure assembly 1 caused by the dimensional difference due to tolerance in multi-layer enclosures.

[0085] According to some embodiments of this application, such as Figures 3-6 As shown, connector 30 is located on the first wall of enclosure assembly 1, and high-voltage distribution box 40 is located on the second wall of enclosure assembly 1. The first wall and the second wall are arranged adjacent to or opposite to each other.

[0086] The first box wall refers to the box wall on any side of the box assembly 1, and the second box wall refers to the box wall adjacent to or opposite to the first box wall. In this application, the box assembly 1 is a rectangular box, the first box wall can be the left box wall of the rectangular box, and the second box wall can be the front box wall, rear box wall, top box wall or bottom box wall of the rectangular box; or, the first box wall can be the left box wall of the rectangular box, and the second box wall can be the right box wall of the rectangular box.

[0087] Since both connector 30 and high-voltage distribution box 40 require a certain amount of space on the surface of the enclosure wall, and since the structure of high-voltage distribution box 40 is relatively complex, there is not enough space on the side of the enclosure wall where connector 30 is located to place the complex structure of high-voltage distribution box 40. By setting high-voltage distribution box 40 and connector 30 on the enclosure walls on different sides of enclosure assembly 1, we can meet the space design requirements of more complex battery devices, and maximize the use of the internal space of the battery unit to place more battery cells, thereby maximizing the battery device's power capacity.

[0088] According to some embodiments of this application, such as Figures 3-6 As shown, the high-voltage distribution box 40 also includes a high-voltage distribution box cover 42. The high-voltage distribution box cover 42 includes a cover body 421 and a first flange 422. The first flange 422 is located around the perimeter of the cover body 421. The first flange 422 is provided with a first mounting hole 423. A first fastener 43 passes through the first mounting hole 423 to install the high-voltage distribution box cover 42 onto the enclosure assembly 1. The side surface of the cover body 421 facing the enclosure wall is provided with a receiving groove, and the functional device 41 is placed in the receiving groove.

[0089] The cover body 421 refers to the cover structure that covers the opening of the high-voltage distribution box 40, forming the outer shell of the high-voltage distribution box 40. The first flange 422 refers to a bent structure extending along the edge of the cover body 421, which can be integrally formed with the cover body 421 through a stamping process, increasing the contact area between the high-voltage distribution box cover 42 and the enclosure assembly 1. The first mounting hole 423 refers to a through hole penetrating the first flange 422, which can be a circular hole structure, used for inserting fasteners such as bolts. The receiving groove refers to a recessed area located inside the cover body 421, which can be formed through machining, used to accommodate functional devices such as relays. The first fastener 43 includes, but is not limited to, bolts, screws, or studs.

[0090] Specifically, the cover body 421 forms a surface contact with the box assembly 1 through the first flange 422, and the first mounting holes 423 are evenly distributed around the first flange 422, so that the first fastener 43 can stably fix the high voltage distribution box cover 42 to the box wall of the box assembly 1.

[0091] Traditional external independent high-voltage distribution boxes 40 require additional brackets or support plates to fix them in place. However, this application achieves simultaneous installation of the high-voltage distribution box 40 and the enclosure assembly 1 during the assembly process, simplifying the installation process and saving time and costs.

[0092] According to some embodiments of this application, such as Figures 3-6 As shown, the high-voltage distribution box cover 42 and the box wall of the enclosure assembly 1 form a cavity for accommodating the functional device 41. The box wall of the enclosure assembly 1 has a ninth mounting hole 103 corresponding to the first mounting hole 423, and the depth of the ninth mounting hole 103 is less than the thickness of the box wall.

[0093] The cavity refers to the three-dimensional enclosed space formed by the lid body 421 and the box wall. Specifically, it can be achieved by the lid body 421 covering the box wall and being fixedly connected by the first flange 422. This cavity has the function of supporting the functional device 41. The ninth mounting hole 103 can be a threaded hole that partially penetrates the box wall, and the first fastener 43 is threadedly connected to the threaded hole.

[0094] The high-voltage distribution box cover 42 and the box wall of the housing assembly 1 together form a hollow, sandwich-like cavity. Using the box wall as part of the high-voltage distribution box 40 not only simplifies the structure of the high-voltage distribution box 40 but also reduces its thickness, thereby reducing its space ratio. This allows for more internal space for the battery unit 100 within the limited space of the battery device, which is beneficial for further increasing the battery's capacity. Furthermore, the depth of the ninth mounting hole 103 is less than the thickness of the box wall. This ensures the stability of the connection between the high-voltage distribution box 40 and the housing assembly 1 while preventing the ninth mounting hole 103 from affecting the airtightness of the battery unit 100, thus ensuring that the installation of the high-voltage distribution box 40 does not affect the airtightness of the battery unit 100.

[0095] According to some embodiments of this application, such as Figure 3 and Figure 6 As shown, the high-voltage distribution box 40 also includes a first sealing element 44, which is located between the first flange 422 and the box wall of the box assembly 1. The high-voltage distribution box cover 42 and the box wall of the box assembly 1 form a sealing interface through the first sealing element 44. The wire hole 101 is located within the inner contour of the orthographic projection of the first sealing element 44 on the box assembly 1.

[0096] The first sealing element 44 refers to the elastic sealing component disposed between the high-voltage distribution box cover 42 and the enclosure assembly 1. Specifically, it can be implemented using a rubber gasket or a silicone ring, and its shape matches the shape of the first flange 422. Since the high-voltage distribution box cover 42 is installed with the enclosure assembly 1 through the first flange 422, and the first sealing element 44 is disposed corresponding to the first flange 422, the effective sealing interface between the high-voltage distribution box cover 42 and the enclosure assembly 1 is located within the range of the orthographic projection of the first flange 422 on the enclosure assembly 1.

[0097] Specifically, both the first flange 422 and the first seal 44 are closed ring structures. The orthographic projection of the first seal 44 on the housing assembly 1 refers to the closed shape formed by the first seal 44 projecting along a direction perpendicular to the housing assembly 1 onto the side wall of the housing assembly 1 where the high-voltage distribution box 40 is located. This closed shape has an outer contour and an inner contour. The high-voltage distribution box cover 42 forms a closed ring sealing interface between the first seal 44 and the housing wall of the housing assembly 1. The wire hole 101 is located within the inner contour of the orthographic projection of the first seal 44 on the housing assembly 1, thereby sealing the high-voltage distribution box 40 and the wire hole 101 and preventing moisture or dust from entering the interior of the high-voltage distribution box 40 through local gaps.

[0098] Compared to the embodiment where the high-voltage distribution box cover 42 directly covers the wire hole 101, this embodiment achieves synchronous sealing of the high-voltage distribution box 40 and the wire hole 101 by setting a first sealing element 44 between the first flange 422 and the box wall of the box assembly 1. This further reduces the risk of external environmental factors (such as dust and moisture) intruding into the high-voltage distribution box 40 and the battery unit, improves the sealing and protection performance of the entire device, and further reduces the risk of corrosion or short circuit of wiring harnesses and electrical components caused by environmental factors.

[0099] According to some embodiments of this application, such as Figure 6 As shown, the orthographic projection outline of the first seal 44 on the housing assembly 1 coincides with the orthographic projection outline of the first flange 422 on the housing assembly 1.

[0100] The orthographic projection of the first sealing element 44 on the enclosure assembly 1 includes an outer contour and an inner contour. The orthographic projection of the first flange 422 on the enclosure assembly 1 refers to the closed shape formed by the first flange 422 projected along a direction perpendicular to the enclosure assembly 1 onto the side wall of the enclosure assembly 1 where the high-voltage distribution box 40 is located. This closed shape has an inner contour and an outer contour. The coincidence of the orthographic projection of the first sealing element 44 on the enclosure assembly 1 with the orthographic projection of the first flange 422 on the enclosure assembly 1 means that the outer contour of the orthographic projection of the first sealing element 44 on the enclosure assembly 1 coincides with the outer contour of the orthographic projection of the first flange 422 on the enclosure assembly 1, and the inner contour of the orthographic projection of the first sealing element 44 on the enclosure assembly 1 coincides with the inner contour of the orthographic projection of the first flange 422 on the enclosure assembly 1. That is, the external dimensions of the first sealing element 44 completely overlap with the orthographic projection of the first flange 422 on the surface of the enclosure assembly 1.

[0101] By setting the first seal 44 to coincide with the orthographic projection contour of the first flange 422 on the housing assembly 1, the effective sealing interface between the high voltage distribution box cover 42 and the housing assembly 1 is maximized, the sealing path from the outside of the high voltage distribution box 40 to the inside of the high voltage distribution box 40 is extended, and the sealing performance and protection performance of the entire device are effectively improved.

[0102] According to some embodiments of this application, such as Figure 6 As shown, the first sealing member 44 is provided with a second mounting hole 441 corresponding to the first mounting hole 423. The first fastener 43 passes through the first mounting hole 423 and the second mounting hole 441 in sequence to install the high voltage distribution box cover 42 and the first sealing member 44 on the box assembly 1, and to compress and seal the first sealing member 44 between the high voltage distribution box cover 42 and the box wall of the box assembly 1.

[0103] The second mounting hole 441 refers to a through hole penetrating the first seal 44. Specifically, it can be a circular hole structure used to pass through fasteners such as bolts. The distribution pattern of the second mounting hole 441 is the same as that of the first mounting hole 423. The second mounting hole 441 can be located in the middle of the first seal 44 or in the edge area of ​​the first seal 44.

[0104] With the high-voltage distribution box cover 42 installed on the outer wall of the enclosure assembly 1 using the first fastener 43, the first seal 44 is compressed between the first flange 422 and the enclosure assembly 1. Since the orthographic projection contour of the first seal 44 perfectly coincides with the orthographic projection contour of the first flange 422, the coverage area of ​​the first seal 44 precisely corresponds to the contact surface between the first flange 422 and the enclosure assembly 1. This spatial matching ensures that the first seal 44 neither exceeds the installation area of ​​the first flange 422, preventing material waste, nor causes seal failure due to insufficient size. During installation, the first fastener 43 passes sequentially through the first mounting hole 423 and the second mounting hole 441 to fix itself to the enclosure wall, enabling synchronous installation and precise alignment of the high-voltage distribution box cover 42 and the first seal 44. Simultaneously, tightening the first fastener 43 achieves compression sealing between the high-voltage distribution box cover 42 and the enclosure assembly 1, improving the sealing effect.

[0105] Since the high-voltage distribution box cover 42 and the box wall of the enclosure assembly 1 are sealed by compression through the first sealing member 44, the expansion force generated after the first sealing member 44 is compressed enables the first sealing member 44 to completely fill the size difference at the connection of adjacent enclosures, thereby solving the sealing problem between the high-voltage distribution box 40 and the enclosure assembly 1 caused by the size difference due to tolerance of multi-layer enclosures.

[0106] According to some embodiments of this application, such as Figure 6 As shown, the high-voltage distribution box 40 also includes a mounting bracket 49, and the functional device 41 is mounted on at least one of the box assembly 1 and the box cover body 421 via the mounting bracket 49.

[0107] Mounting bracket 49 refers to a rigid support for mounting functional devices 41, including but not limited to rigid structures such as connecting plates, support plates, or mounting bases. In this application, each functional device 41 in the high-voltage distribution box 40 is mounted on the outer wall of the enclosure assembly 1 or on the inner wall of the box cover body 421 via mounting bracket 49; alternatively, some functional devices 41 are mounted on the outer wall of the enclosure assembly 1, while the remaining functional devices 41 are mounted on the inner wall of the box cover body 421.

[0108] Compared to traditional high-voltage distribution boxes where functional components are laid flat (perpendicular to the box wall) on the bottom plate, this application uses mounting brackets 49 to install each functional component 41 along a direction parallel to the box wall on at least one of the box assembly 1 and the box cover body 421, achieving three-dimensional installation of each functional component 41 in the high-voltage distribution box 40, reducing the thickness of the high-voltage distribution box 40 in the direction perpendicular to the adjacent box wall, thereby reducing the space ratio of the high-voltage distribution box 40.

[0109] According to some embodiments of this application, such as Figures 3-5As shown, the high-voltage distribution box 40 also includes a high-voltage distribution box base 46 adapted to the high-voltage distribution box cover 42. The high-voltage distribution box base 46 is mounted on the box assembly 1 and includes a base body 461 and a second flange 462. The second flange 462 is located around the perimeter of the base body 461. The second flange 462 is provided with a third mounting hole 4621 corresponding to the first mounting hole 423. The first fastener 43 passes through the first mounting hole 423 and the third mounting hole 4621 in sequence to mount the high-voltage distribution box cover 42 onto the high-voltage distribution box base 46. The high-voltage distribution box cover 42 and the high-voltage distribution box base 46 enclose a cavity for accommodating the functional device 41. The functional device 41 is mounted on at least one of the base body 461 and the cover body 421.

[0110] The base body 461 refers to the structure corresponding to the high-voltage distribution box base 46 and the cover body 421, used to form the outer shell of the high-voltage distribution box 40. The second flange 462 refers to a bent structure extending from the edge of the base body 461 towards the high-voltage distribution box cover 42. Specifically, it can be integrally formed with the base body 461 through a stamping process, and the installation of the high-voltage distribution box base 46 and the high-voltage distribution box cover 42 is achieved by forming a surface contact with the first flange 422. The third mounting hole 4621 refers to a through hole that penetrates or partially penetrates the second flange 462. Specifically, it can be a circular hole structure used for fasteners such as bolts.

[0111] The third mounting hole 4621 is evenly distributed around the second flange 462, and its specific distribution method is consistent with the distribution method of the first mounting hole 423, so that the first fastener 43 can stably fix the high voltage distribution box cover 42 on the high voltage distribution box base 46.

[0112] Understandably, when the third mounting hole 4621 is a through hole penetrating the second flange 462, the first fastener 43 passes through the first mounting hole 423 and the third mounting hole 4621 in sequence and is threadedly connected to the wall of the enclosure assembly 1, thereby fixing the high-voltage distribution box cover 42 and the high-voltage distribution box base 46 together to the wall of the enclosure assembly 1. When the third mounting hole 4621 is a through hole partially penetrating the second flange 462, the high-voltage distribution box base 46 is first fixed to the wall of the enclosure assembly 1, and the first fastener 43 passes through the first mounting hole 423 and is threadedly connected to the third mounting hole 4621, thereby fixing the high-voltage distribution box cover 42 to the high-voltage distribution box base 46.

[0113] The functional components 41 are installed on the inner wall of the base body 461 or the lid body 421; or, some of the functional components 41 are installed on the inner wall of the base body 461, and the remaining functional components 41 are installed on the inner wall of the lid body 421.

[0114] The high-voltage distribution box cover 42 and the high-voltage distribution box base 46 of this application combine to form the outer shell structure of the high-voltage distribution box 40. The functional components 41 are installed within the cavity formed by the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, which improves the overall structural stability of the high-voltage distribution box 40 and provides better protection for each functional component 41. Compared to traditional high-voltage distribution boxes where functional components are laid flat (perpendicular to the box wall) on the bottom plate, this application installs each functional component 41 along a direction parallel to the box wall on the inner wall of at least one of the base body 461 and the cover body 421, achieving three-dimensional installation of each functional component 41 in the high-voltage distribution box 40. This reduces the thickness of the high-voltage distribution box 40 in the direction perpendicular to the adjacent box wall, thereby reducing the space ratio of the high-voltage distribution box 40.

[0115] According to some embodiments of this application, such as Figures 3-5 As shown, the base body 461 has a wire hole at the position corresponding to the wire hole 101. The first connecting wire harness and the second connecting wire harness 50 are introduced into the receiving cavity from the high voltage distribution box 40 by passing through the wire hole and the wire hole 101 in sequence.

[0116] A wire-through hole refers to a through-hole structure provided on the base 46 of the high-voltage distribution box, used to realize the electrical connection between the internal and external electrical components of the high-voltage distribution box 40. The hole diameter is designed according to the specifications of the wire harness. In this application, the hole diameter is the same as the through-hole diameter 101. The wire-through hole is used to lead the first connecting wire harness and the second connecting wire harness 50 connected to the functional device 41 inside the high-voltage distribution box 40 to the outside of the high-voltage distribution box 40.

[0117] Since the positions of the through hole and the wire hole 101 correspond, the first connecting wire harness and the second connecting wire harness 50 led out from the through hole can be directly introduced into the housing cavity of the battery cell through the wire hole 101, eliminating the need for winding design, reducing wire harness bending and redundant length, reducing the space occupied by the wire harness, and simplifying the wire harness wiring design.

[0118] According to some embodiments of this application, such as Figures 3-5 As shown, the high-voltage distribution box 40 also includes a second sealing element 45 and a third sealing element 48. The second sealing element 45 is located between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, so that a sealing interface is formed between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46. The third sealing element 48 is located between the high-voltage distribution box base 46 and the box wall of the box assembly 1, so that a sealing interface is formed between the high-voltage distribution box base 46 and the box wall of the box assembly 1.

[0119] The wire hole 101 is located within the inner contour of the orthographic projection of the third seal 48 on the housing assembly 1, and the outer contour of the orthographic projection of the wire hole on the housing assembly 1 is located within the inner contour of the orthographic projection of the third seal 48 on the housing assembly 1.

[0120] The second sealing element 45 refers to the elastic sealing component disposed between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46. Specifically, it can be implemented by rubber gaskets or silicone rings. Its shape matches the shape of the first flange 422 and / or the second flange 462, so that a closed ring sealing interface is formed between the first flange 422 and the second flange 462.

[0121] The third sealing element 48 refers to the elastic sealing component set between the high-voltage distribution box base 46 and the box assembly 1. Specifically, it can be implemented by rubber gaskets or silicone rings. Its shape is not limited, as long as it can form a closed ring-shaped sealing interface between the high-voltage distribution box base 46 and the box assembly 1 around the area corresponding to the wire hole 101 and the wire hole.

[0122] Specifically, both the second seal 45 and the third seal 48 are closed-ring structures. The orthographic projection of the third seal 48 onto the enclosure assembly 1 refers to the closed shape formed by the third seal 48 projected along a direction perpendicular to the enclosure assembly 1 onto the side wall of the enclosure assembly 1 where the high-voltage distribution box 40 is located. This closed shape has an inner contour and an outer contour. The high-voltage distribution box base 46 forms a closed-ring sealing interface with the enclosure wall of the enclosure assembly 1 through the third seal 48.

[0123] This application achieves a seal between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46 through a second sealing element 45. Furthermore, a third sealing element 48 is provided between the high-voltage distribution box base 46 and the enclosure assembly 1. The wire passage hole 101 is positioned within the inner contour of the orthographic projection of the third sealing element 48 onto the enclosure assembly 1, and the outer contour of the orthographic projection of the wire hole onto the enclosure assembly 1 is located within the inner contour of the orthographic projection of the third sealing element 48 onto the enclosure assembly 1. This seals both the wire passage hole 101 and the wire hole. Through this design, the risk of external environmental factors (such as dust and moisture) intruding into the high-voltage distribution box and battery unit can be reduced, improving the overall sealing and protection performance of the device, and further reducing the risk of corrosion or short circuits in wiring harnesses and electrical components caused by environmental factors.

[0124] According to some embodiments of this application, such as Figures 3-5 As shown, the second sealing member 45 is located between the first flange 422 and the second flange 462. The second sealing member 45 is provided with a fourth mounting hole 451 that corresponds one-to-one with the first mounting hole 423. The first fastener 43 passes through the first mounting hole 423, the fourth mounting hole 451 and the third mounting hole 4621 in sequence to install the high voltage distribution box cover 42 and the second sealing member 45 on the high voltage distribution box base 46, and to compress and seal the second sealing member 45 between the high voltage distribution box cover 42 and the high voltage distribution box base 46.

[0125] The fourth mounting hole 451 refers to a through hole penetrating the second seal 45, which can be a circular hole structure used for fasteners such as bolts. The distribution pattern of the fourth mounting hole 451 is the same as that of the first mounting hole 423, and will not be described again here.

[0126] During the installation of the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, the first fastener 43 passes through the first mounting hole 423, the fourth mounting hole 451 and the third mounting hole 4621 in sequence. By locking the first fastener 43, the second sealing element 45 is compressed between the first flange 422 and the second flange 462. This achieves the synchronous installation and precise alignment of the high-voltage distribution box cover 42, the second sealing element 45 and the high-voltage distribution box base 46. At the same time, it also achieves the compression sealing of the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, simplifying the installation process.

[0127] According to some embodiments of this application, such as Figures 3-5 As shown, the second flange 462 is also provided with a fifth mounting hole 4622. The fifth mounting hole 4622 and the third mounting hole 4621 are alternately distributed. The second fastener 47 passes through the fifth mounting hole 4622 to install the high voltage distribution box base 46 onto the box assembly 1.

[0128] The second seal 45 is provided with a clearance groove 452 at the position corresponding to the fifth mounting hole 4622.

[0129] The fifth mounting hole 4622 refers to a through hole penetrating the second flange 462, specifically a circular hole structure, used for fasteners such as bolts. Alternating distribution means that the fifth mounting hole 4622 and the third mounting hole 4621 are spaced apart, with no overlap, and are arranged alternately. The second fastener 47 includes, but is not limited to, bolts, screws, or studs. The clearance groove 452 refers to a notch or groove formed in the second seal 45 through machining, mainly used to provide assembly space for the second fastener 47 or to avoid interference.

[0130] The high-voltage distribution box base 46 is mounted on the enclosure assembly 1 via the second fastener 47, which improves the reliability of the connection between the high-voltage distribution box base 46 and the enclosure assembly 1, and provides a stable foundation for the subsequent sealing between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, thereby improving the reliability of the seal between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46. The second sealing element 45 has a clearance groove 452 at the position corresponding to the fifth mounting hole 4622, so that the second sealing element 45 avoids the second fastener 47, thereby allowing the second sealing element 45 to tightly fit the mounting surfaces of the first flange 422 and the second flange 462 in the compressed state, ensuring the sealing effect of the second sealing element 45.

[0131] According to some embodiments of this application, such as Figures 3-4 As shown, the third sealing element 48 is provided corresponding to the second flange 462. The third sealing element 48 is provided with a sixth mounting hole 481 that corresponds one-to-one with the fifth mounting hole 4622. The second fastener 47 passes through the fifth mounting hole 4622 and the sixth mounting hole 481 in sequence to install the high voltage distribution box base 46 and the third sealing element 48 on the enclosure assembly 1, and to compress and seal the third sealing element 48 between the high voltage distribution box base 46 and the enclosure wall of the enclosure assembly 1.

[0132] The sixth mounting hole 481 refers to the through hole that passes through the third seal 48. Specifically, it can be a circular hole structure used to pass through fasteners such as bolts.

[0133] During the installation of the high-voltage distribution box base 46 and the enclosure assembly 1, the second fastener 47 passes through the fifth mounting hole 4622 and the sixth mounting hole 481 in sequence to install the high-voltage distribution box base 46 and the third seal 48 onto the enclosure assembly 1 simultaneously. By tightening the second fastener 47, the third seal 48 is compressed between the high-voltage distribution box base 46 and the enclosure assembly 1, thereby achieving compression sealing between the high-voltage distribution box base 46 and the enclosure assembly 1. At the same time, it also enables precise alignment of the high-voltage distribution box base 46 and the third seal 48, simplifying the installation process.

[0134] According to some embodiments of this application, such as Figures 3-4 As shown, the outer contour of the orthographic projection of the third seal 48 on the housing assembly 1 coincides with the outer contour of the orthographic projection of the high voltage distribution box base 46 on the housing assembly 1.

[0135] The outer contour of the orthographic projection of the third seal 48 on the enclosure assembly 1 coincides with the outer contour of the orthographic projection of the high voltage distribution box base 46 on the enclosure assembly 1, meaning that the four edges of the third seal 48 and the high voltage distribution box base 46 are aligned in the direction perpendicular to the enclosure wall.

[0136] By aligning the third sealing element 48 and the four edges of the high-voltage distribution box base 46 in a direction perpendicular to the box wall, the entire high-voltage distribution box base 46 can be sealed. The wire hole 101 and the wire through hole can be flexibly set, and the sealing blind zone can be avoided due to the third sealing element 48 being too large, resulting in material redundancy, or too small, resulting in sealing blind zone.

[0137] According to some embodiments of this application, such as Figures 3-5 As shown, at least a portion of the outer contour of the orthographic projection of the third seal 48 onto the housing assembly 1 lies within the outer contour of the orthographic projection of the base body 461 onto the housing assembly 1.

[0138] The orthographic projection of the base body 461 onto the enclosure assembly 1 refers to the closed shape formed by the base body 461 projected along a direction perpendicular to the enclosure assembly 1 onto the side wall of the enclosure assembly 1 where the high-voltage distribution box 40 is located. This closed shape has an outer contour. At least a portion of the outer contour of the orthographic projection of the third seal 48 onto the enclosure assembly 1 lies within the outer contour of the orthographic projection of the base body 461 onto the enclosure assembly 1. That is, a portion of the third seal 48 can be set corresponding to the second flange 462, and the remaining portion can be set corresponding to the base body 461; or, the entire third seal 48 can be set corresponding to the base body 461.

[0139] Since the second flange 462 is a bent structure formed by extending the edge of the base body 461 towards the high-voltage distribution box cover 42, i.e., the second flange 462 and the base body 461 are integrally formed, the sealing between the high-voltage distribution box base 46 and the box assembly 1 only needs to consider the positions of the wire hole 101 and the through hole. By setting the third seal 48 such that at least a portion of its outer contour of the orthographic projection on the box assembly 1 is located within the outer contour of the orthographic projection of the base body 461 on the box assembly 1, the size of the third seal 48 can be appropriately reduced. The third seal 48 only needs to be able to simultaneously seal the wire hole 101 and the through hole, which not only saves costs, but also allows the third seal 48 to be used for various different models and specifications.

[0140] According to some embodiments of this application, such as Figure 3 and Figure 5 As shown, the base body 461 has a seventh mounting hole corresponding to the third sealing member 48. The third sealing member 48 has an eighth mounting hole 482 corresponding to the seventh mounting hole. The third fastener passes through the seventh mounting hole and the eighth mounting hole 482 in sequence to install the high voltage distribution box base 46 and the third sealing member 48 onto the enclosure assembly 1, and to compress and seal the third sealing member 48 between the high voltage distribution box base 46 and the enclosure wall of the enclosure assembly 1.

[0141] The seventh mounting hole is a through hole penetrating the base body 461, which can be a circular hole for fasteners such as bolts. The eighth mounting hole 482 is a through hole penetrating the third seal 48, which can also be a circular hole for fasteners such as bolts. The third fastener includes, but is not limited to, bolts, screws, or studs.

[0142] The third seal 48 is fixed by at least one of the second fastener 47 and the third fastener. During installation, by tightening the second fastener 47 and the third fastener, the third seal 48 is compressed in the direction perpendicular to the box wall, thereby forming a closed annular sealing interface between the high voltage distribution box base 46 and the box wall of the box assembly 1, realizing the compression seal between the high voltage distribution box 40 and the box assembly 1, and preventing water vapor or dust from entering the interior of the high voltage distribution box 40 and the box assembly 1.

[0143] According to some embodiments of this application, such as Figures 3-6 As shown, the high-voltage distribution box 40 is an irregularly shaped structure manufactured by die casting.

[0144] Die casting is a metal casting process that uses high pressure applied to molten metal within a mold cavity to solidify the molten metal into a precise casting shape. Die casting can be used to manufacture complex structures or structures of different shapes. Irregular structures refer to structural components with non-traditional or non-standard shapes, that is, special structural forms whose shape and size differ from conventional standard components. In this application, the high-voltage distribution box 40 being an irregular structure means that the high-voltage distribution box cover 42 has a non-traditional or non-standard shape; or, both the high-voltage distribution box cover 42 and the high-voltage distribution box base 46 have non-traditional or non-standard shapes.

[0145] With the development of power batteries, electrical devices are demanding increasingly higher space utilization rates for battery packs, making traditional, regularly shaped high-voltage distribution boxes increasingly difficult to meet market demands. This application utilizes die-casting technology to break away from the traditional regular shape of high-voltage distribution boxes, creating irregularly shaped boxes to meet more complex and demanding spatial requirements. This allows battery packs to adapt to more complex spatial design needs, thus satisfying the ever-increasing space utilization requirements of electrical devices.

[0146] According to some embodiments of this application, such as Figures 3-6 As shown, the battery device also includes a maintenance switch 60, which is located on the same side wall of the housing assembly 1 as the connector 30, and the maintenance switch 60 and the connector 30 are separated by a gap.

[0147] The maintenance switch 60 refers to the manual service disconnect (MSD), a manually operated device used to quickly disconnect high-voltage circuits during maintenance.

[0148] The maintenance switch 60 and connector 30 are set on the same side wall of the housing assembly 1. When placing the battery device, the side wall of the housing with the maintenance switch 60 and connector 30 can be placed facing the area that is easy for maintenance personnel to operate. This arrangement makes it convenient to plug, unplug, disassemble and disconnect the power when the battery device is maintained.

[0149] This application also provides an electrical device that includes a battery device as described in any of the above embodiments, the battery device being used to provide electrical energy.

[0150] Electrical devices include vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc.

[0151] It is understood that the electrical device provided in this application, by applying the battery device of any of the above embodiments, has all the beneficial effects of the battery device described above, which will not be repeated here.

[0152] This application also provides an energy storage device, which includes a battery device as described in any of the above embodiments, the battery device being used for energy storage.

[0153] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, and so on.

[0154] It is understood that the energy storage device provided in this application, by applying the battery device of any of the above embodiments, has all the beneficial effects of the battery device described above, which will not be repeated here.

[0155] The battery device of this application will be described in detail below with reference to specific embodiments, as detailed below.

[0156] like Figure 2 , Figure 3 and Figure 4 As shown, Embodiment 1 of this application provides a battery device, which includes three stacked battery units 100. Each battery unit 100 includes a housing 10 and a battery cell 20. The housing 10 includes a receiving cavity, and the battery cell 20 is disposed in the receiving cavity. Adjacent battery cells 20 are electrically connected. The housings 10 are stacked to form a housing assembly 1. The housing wall of the housing assembly 1 is provided with a wire hole 101 communicating with the receiving cavity.

[0157] The battery assembly also includes a connector 30, a high-voltage distribution box 40, a first connecting harness (not shown), and a second connecting harness 50. The connector 30 passes through the housing assembly 1 and is electrically connected to the battery cell 20. The high-voltage distribution box 40 is disposed on the outer wall of the housing assembly 1, and the high-voltage distribution box 40 and the connector 30 are respectively located on different sides of the housing assembly 1. The outer contour of the orthographic projection of the high-voltage distribution box 40 on the housing assembly 1 lies across the three housings 10, that is, the high-voltage distribution box 40 is arranged across three housings 10, and the wire hole 101 is located within the outer contour of the orthographic projection of the high-voltage distribution box 40 on the housing assembly 1. One end of the first connecting harness is electrically connected to the functional device 41 inside the high-voltage distribution box 40, and the other end is introduced into the receiving cavity through the wire hole 101 and electrically connected to the battery cell 20. One end of the second connecting harness 50 is electrically connected to the functional device 41 inside the high-voltage distribution box 40, and the other end is introduced into the receiving cavity through the wire hole 101 and electrically connected to the connector 30.

[0158] like Figure 4 As shown, specifically, the high-voltage distribution box 40 includes a high-voltage distribution box cover 42, a high-voltage distribution box base 46, a second seal 45, a third seal 48, and a functional device 41.

[0159] The high-voltage distribution box base 46 is mounted on the wall of the enclosure assembly 1, and the high-voltage distribution box cover 42 is mounted on the high-voltage distribution box base 46. The high-voltage distribution box cover 42 and the high-voltage distribution box base 46 together form a cavity for accommodating the functional device 41, which is placed in the cavity. The high-voltage distribution box cover 42 is sealed to the high-voltage distribution box base 46 by a second sealing member 45, and the high-voltage distribution box base 46 is sealed to the enclosure assembly 1 by a third sealing member 48.

[0160] The high-voltage distribution box base 46 includes a base body 461 and a second flange 462. The second flange 462 is located around the perimeter of the base body 461 and is bent towards the high-voltage distribution box cover 42 to form a mounting surface for the high-voltage distribution box base 46. The second flange 462 has a third mounting hole 4621 and a fifth mounting hole 4622 arranged alternately along its circumference. The third mounting hole 4621 is a threaded hole that partially penetrates the second flange 462, and the fifth mounting hole 4622 is a through hole that completely penetrates the second flange 462. A second fastener 47 passes through the fifth mounting hole 4622 to fix the high-voltage distribution box base 46 to the housing assembly 1. A functional component 41 is mounted on the surface of the base body 461 facing the high-voltage distribution box cover 42, and the base body 461 provides good support for the functional component 41.

[0161] To facilitate the exit of the first and second connecting wire harnesses 50 from the high-voltage distribution box 40, the base body 461 is provided with a through hole (not shown) corresponding to the wire passage hole 101. Both the first and second connecting wire harnesses 50 pass through the through hole and the wire passage hole 101 sequentially from inside the high-voltage distribution box 40 into the receiving cavity. The size of the through hole is the same as the size of the wire passage hole 101.

[0162] The high-voltage distribution box cover 42 includes a cover body 421 and a first flange 422. The first flange 422 is located around the periphery of the cover body 421 and forms the mounting surface of the high-voltage distribution box cover 42. The first flange 422 has first mounting holes 423 spaced circumferentially thereon, each corresponding to a third mounting hole 4621. The first mounting holes 423 are through holes that completely penetrate the first flange 422. A first fastener 43 passes through the first mounting hole 423 and is threadedly connected to the third mounting hole 4621, thereby mounting the high-voltage distribution box cover 42 onto the high-voltage distribution box base 46. The cover body 421 protrudes towards the side opposite to the high-voltage distribution box base 46 to form a receiving groove for accommodating functional components 41, facilitating the placement of the functional components 41.

[0163] The shape of the second sealing element 45 is adapted to the first flange 422 and the second flange 462 respectively, and the second sealing element 45 is located between the first flange 422 and the second flange 462. The second sealing element 45 is provided with fourth mounting holes 451 arranged at intervals along its circumference. The fourth mounting holes 451 correspond one-to-one with the first mounting holes 423. The fourth mounting holes 451 are through holes that completely penetrate the first flange 422, and the first fastener 43 passes through the fourth mounting holes 451.

[0164] During the installation of the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, the first fastener 43 passes through the first mounting hole 423 and the fourth mounting hole 451 in sequence to install the high-voltage distribution box cover 42 and the second sealing member 45 together on the high-voltage distribution box base 46. Furthermore, by tightening the first fastener 43, the second sealing member 45 is compressed in the direction perpendicular to the mounting surfaces of the first flange 422 and the second flange 462, thereby forming a closed annular sealing interface between the first flange 422 and the second flange 462. This achieves a compression seal between the high-voltage distribution box cover 42 and the high-voltage distribution box base 46, preventing moisture or dust from entering the interior of the high-voltage distribution box 40.

[0165] In some embodiments, in order to achieve a better sealing effect, the second seal 45 is provided with an avoidance groove 452 at the position corresponding to the fifth mounting hole 4622, so that the second seal 45 avoids the second fastener 47, thereby allowing the second seal 45 to fit tightly against the mounting surfaces of the first flange 422 and the second flange 462 in the compressed state, ensuring the sealing effect of the second seal 45.

[0166] Furthermore, with the high-voltage distribution box base 46 installed on the enclosure assembly 1, the end of the second fastener 47 away from the enclosure assembly is flush with or embedded in the surface of the second flange 462 facing the first flange 422, so as to prevent the second fastener 47 from protruding from the surface of the second flange 462 facing the first flange 422 and affecting the compression of the second seal 45.

[0167] The third seal 48 is located between the high-voltage distribution box base 46 and the box wall of the enclosure assembly 1, and has a hollow structure at least at the position corresponding to the wire hole 101. The third seal 48 has a sixth mounting hole 481 arranged at intervals along its edge area. The sixth mounting hole 481 corresponds one-to-one with the fifth mounting hole 4622. The sixth mounting hole 481 is a through hole that penetrates the third seal 48, and the second fastener 47 passes through the sixth mounting hole 481. Correspondingly, the box wall of the enclosure assembly 1 has a tenth mounting hole 102 that corresponds one-to-one with the fifth mounting hole 4622. The tenth mounting hole 102 is a threaded hole that partially penetrates the box wall, and the second fastener 47 is threadedly connected to the tenth mounting hole 102.

[0168] During the installation of the high-voltage distribution box base 46 and the enclosure assembly 1, the second fastener 47 passes through the fifth mounting hole 4622 and the sixth mounting hole 481 in sequence to install the high-voltage distribution box base 46 and the third sealing element 48 together onto the enclosure assembly 1. By tightening the second fastener 47, the third sealing element 48 is compressed in the direction perpendicular to the enclosure wall. The expansion force generated after the third sealing element 48 is compressed allows it to completely fill the dimensional difference at the connection between adjacent enclosures, thereby forming a closed annular sealing interface between the high-voltage distribution box base 46 and the enclosure wall of the enclosure assembly 1. This achieves a compression seal between the high-voltage distribution box 40 and the enclosure assembly 1, preventing moisture or dust from entering the interior of the high-voltage distribution box 40 and the enclosure assembly 1, thus solving the sealing problem between the high-voltage distribution box 40 and the enclosure assembly 1 caused by the dimensional differences in tolerances of multi-layer enclosures.

[0169] The outer contour of the orthographic projection of the third sealing element 48 on the enclosure assembly 1 coincides with the outer contour of the orthographic projection of the high-voltage distribution box base 46 on the enclosure assembly 1. The inner contour of the orthographic projection of the third sealing element 48 on the enclosure assembly 1 lies between the boundary of the wire hole 101 and the outer contour of the orthographic projection of the third sealing element 48 on the enclosure assembly 1. In other words, the shape and size of the hollow structure on the third sealing element 48 are not limited, as long as the wire hole 101 and the wire through hole are exposed.

[0170] In this embodiment, the shape of the third seal 48 is adapted to the second flange 462, and the third seal 48 is provided corresponding to the second flange 462.

[0171] The wire hole 101 is located within the inner contour of the orthographic projection of the third seal 48 on the housing assembly 1, and the outer contour of the orthographic projection of the wire hole on the housing assembly 1 is located within the inner contour of the orthographic projection of the third seal 48 on the housing assembly 1. The third seal 48 simultaneously seals the wire hole 101 and the wire hole.

[0172] The battery unit also includes a maintenance switch 60, which is located on the same side wall of the housing assembly 1 as the connector 30. The maintenance switch 60 and the connector 30 are separated to facilitate operation by the staff when the battery unit is being maintained.

[0173] In this embodiment, the high-voltage distribution box 40 is placed on the outer wall of the battery pack assembly 1, and the high-voltage distribution box 40 and the connector 30 are separately and independently set on different sides of the pack wall of the pack assembly 1. The connection harness between the functional components in the high-voltage distribution box 40 and the battery cell 20 and the connector 30 is introduced into the receiving cavity through the wire hole 101 on the pack wall. This realizes the overall design of the high-voltage distribution box 40 and the battery pack, without the need for additional connectors to transfer the external high-voltage distribution box 40 to the battery cell 20 in the receiving cavity. The external high-voltage distribution box 40 design can free up some space in the receiving cavity, optimize the battery distribution in the receiving cavity, improve the utilization rate of the internal space of the battery cell, and thus improve the battery capacity of the battery pack.

[0174] like Figure 2 , Figure 3 and Figure 5 As shown, Embodiment 2 of this application provides a battery device. The difference between this embodiment and Embodiment 1 is that at least a portion of the outer contour of the orthographic projection of the third sealing member 48 on the housing assembly 1 is located within the outer contour of the orthographic projection of the base body 461 on the housing assembly 1. The base body 461 is provided with a seventh mounting hole (not shown) corresponding to the third sealing member 48. The third sealing member 48 is provided with an eighth mounting hole 482 corresponding to the seventh mounting hole. The third fastener passes through the seventh mounting hole and the eighth mounting hole 482 in sequence to install the high voltage distribution box base 46 and the third sealing member 48 on the housing assembly 1.

[0175] In this embodiment, the third sealing element 48 is disposed tightly around the wire hole 101 and the wire through hole. A portion of the third sealing element 48 corresponds to the second flange 462, and the remaining portion corresponds to the base body 461. That is to say, in this embodiment, the third sealing element 48 only needs to seal the wire through hole 101 and the wire through hole, and does not need to be disposed over a large area.

[0176] During the installation of the high-voltage distribution box base 46 and the enclosure assembly 1, the second fastener 47 corresponding to the third seal 48 passes through the fifth mounting hole 4622 and the sixth mounting hole 481 in sequence and connects to the enclosure assembly 1. The remaining second fasteners 47 pass through the fifth mounting hole 4622 and connect directly to the enclosure assembly 1. The third fasteners corresponding to the third seal 48 pass through the seventh mounting hole and the eighth mounting hole 482 in sequence and connect to the enclosure assembly 1, thereby installing the high-voltage distribution box base 46 and the third seal 48 together on the enclosure assembly 1. In addition, by tightening the second fasteners 47 and the third fasteners, the third seal 48 is compressed in the direction perpendicular to the enclosure wall, thereby forming a closed annular sealing interface between the high-voltage distribution box base 46 and the enclosure wall of the enclosure assembly 1, achieving a compression seal between the high-voltage distribution box 40 and the enclosure assembly 1, preventing moisture or dust from entering the interior of the high-voltage distribution box 40 and the enclosure assembly 1.

[0177] It should be noted that, since the third sealing element 48 in this embodiment is arranged to pass through the wire hole 101 and the wire hole, and the wire hole 101 and the wire hole are both arranged to correspond to the single-layer box 10, the third sealing element 48 in this embodiment can also be arranged to correspond to only the single-layer box 10, so there is no problem of cross-layer sealing.

[0178] The other structures of the battery device in this embodiment are the same as or similar to those of the battery device in Embodiment 1 above. Please refer to the description in Embodiment 1 above for details, which will not be repeated here.

[0179] like Figure 2 , Figure 3 and Figure 6 As shown, Embodiment 3 of this application provides a battery device. The difference between this embodiment and Embodiment 1 is that the design of the high-voltage distribution box base 46 is omitted in this embodiment. The high-voltage distribution box 40 of this embodiment includes a functional component 41, a high-voltage distribution box cover 42, a first fastener 43, and a first sealing element 44. The box wall of the box assembly 1 is provided with a first mounting hole (such as...). Figure 4 The ninth mounting hole 103 (423) corresponds to the first fastener 43. The high voltage distribution box cover 42 is directly installed on the box assembly 1. The high voltage distribution box cover 42 and the box assembly 1 are sealed by the first sealing element 44. The high voltage distribution box cover 42 and the box wall of the box assembly 1 form a cavity for accommodating the functional device 41. The functional device 41 is placed in the cavity.

[0180] The ninth mounting hole 103 is a threaded hole that partially penetrates the box wall, and the first fastener 43 is threadedly connected to the ninth mounting hole 103.

[0181] It should be noted that the structure of the battery unit and the high-voltage distribution box cover 42 in this embodiment is the same as / similar to the structure in Embodiment 1 above, and will not be described again here.

[0182] The shape of the first sealing element 44 is adapted to the first flange 422, and the first sealing element 44 is located between the first flange 422 and the housing assembly 1. The first sealing element 44 is provided with second mounting holes 441 arranged at intervals along its circumference. The second mounting holes 441 correspond one-to-one with the first mounting holes. The second mounting holes 441 are through holes that completely penetrate the first sealing element 44, and the first fastener 43 passes through the second mounting holes 441.

[0183] During the installation of the high-voltage distribution box cover 42 and the enclosure assembly 1, the first fastener 43 passes through the first mounting hole and the second mounting hole 441 in sequence and connects to the enclosure assembly 1, thereby installing the high-voltage distribution box cover 42 and the first sealing element 44 together on the enclosure assembly 1. By tightening the first fastener 43, the first sealing element 44 is compressed in the direction perpendicular to the enclosure wall. The expansion force generated after the first sealing element 44 is compressed allows it to completely fill the dimensional difference at the connection between adjacent enclosures, thereby forming a closed annular sealing interface between the first flange 422 and the enclosure wall of the enclosure assembly 1. This achieves a compression seal between the high-voltage distribution box cover 42 and the enclosure assembly 1, preventing moisture or dust from entering the interior of the high-voltage distribution box 40 and the enclosure assembly 1, and thus solving the sealing problem between the high-voltage distribution box 40 and the enclosure assembly 1 caused by the dimensional difference due to tolerances in multi-layer enclosures.

[0184] The wire hole 101 is located within the inner contour of the orthographic projection of the first seal 44 onto the housing assembly 1, so that the high-voltage distribution box 40 and the wire hole 101 can be sealed simultaneously through the first seal 44.

[0185] Furthermore, since the first flange 422 is used to form the mounting surface between the high-voltage distribution box cover 42 and the enclosure assembly 1, the first seal 44 is designed so that its orthographic projection profile on the enclosure assembly 1 coincides with the orthographic projection profile of the first flange 422 on the enclosure assembly 1. In this way, the sealing path from the outside to the inside of the high-voltage distribution box 40 can be maximized, achieving the best sealing effect.

[0186] Since the design of the high-voltage distribution box base 46 is omitted in this embodiment, if the functional components 41 are all installed on the inner side wall of the box cover body 421, the load on the first fastener 43 will be increased, which may affect the sealing performance of the high-voltage distribution box cover 42 and the box assembly 1 in the long term.

[0187] To address this issue, the high-voltage distribution box 40 in this embodiment is further provided with a mounting bracket 49. The functional components 41 are mounted on the enclosure assembly 1 via the mounting bracket 49, achieving three-dimensional mounting of each functional component 41, reducing the thickness of the high-voltage distribution box 40 in the direction perpendicular to the adjacent enclosure wall, and reducing the space ratio of the high-voltage distribution box 40. Furthermore, since the high-voltage distribution box base 46 is eliminated in this embodiment, the structural design of the high-voltage distribution box 40 is simplified, thereby further reducing the space ratio of the high-voltage distribution box 40.

[0188] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. 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 they should all be covered within the scope of the claims and 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. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, The device includes at least two stacked battery cells. Each battery cell includes a housing and a battery cell. The housing includes a receiving cavity. The battery cell is disposed in the receiving cavity. Two adjacent battery cells are electrically connected. The housings are stacked to form a housing assembly. The housing assembly has a wire hole on its wall that communicates with the receiving cavity. The battery device also includes: A connector is mounted on the housing assembly and is electrically connected to the individual battery cells. A high-voltage distribution box is disposed on the outer wall of the enclosure assembly, and the high-voltage distribution box and the connector are respectively located on the enclosure walls on different sides of the enclosure assembly; The first connecting harness has one end electrically connected to the functional device inside the high-voltage distribution box, and the other end is introduced into the receiving cavity through the wire hole and electrically connected to the battery cell. The second connecting harness has one end electrically connected to the functional device inside the high-voltage distribution box, and the other end is introduced into the receiving cavity through the wire hole and electrically connected to the connector.

2. The battery device according to claim 1, characterized in that, The high-voltage distribution box and the wiring hole are located on the same side of the enclosure wall of the enclosure assembly, and the wiring hole is located within the outer contour of the orthographic projection of the high-voltage distribution box on the enclosure assembly.

3. The battery device according to claim 2, characterized in that, The outer contour of the high-voltage distribution box projected onto the enclosure assembly is located on at least two of the enclosures. A sealing interface is formed between the high-voltage distribution box and the enclosure wall of the enclosure assembly, and the wire hole is located within the sealing range of the sealing interface.

4. The battery device according to claim 3, characterized in that, The wire hole is located on the wall of any of the enclosures connected to the high-voltage distribution box.

5. The battery device according to claim 3, characterized in that, The high-voltage distribution box and the enclosure wall of the enclosure assembly are sealed by a compression seal.

6. The battery device according to claim 2, characterized in that, The connector is located on the first wall of the enclosure assembly, and the high-voltage distribution box is located on the second wall of the enclosure assembly. The first wall and the second wall are arranged adjacent to or opposite to each other.

7. The battery device according to any one of claims 2-6, characterized in that, The high-voltage distribution box also includes a high-voltage distribution box cover. The high-voltage distribution box cover includes a cover body and a first flange. The first flange is located around the perimeter of the cover body. The first flange has a first mounting hole. A first fastener passes through the first mounting hole to install the high-voltage distribution box cover onto the enclosure assembly. The side surface of the cover body facing the enclosure wall has a receiving groove, and the functional device is placed in the receiving groove.

8. The battery device according to claim 7, characterized in that, The high-voltage distribution box cover and the box wall of the enclosure assembly form a cavity for accommodating the functional devices.

9. The battery device according to claim 8, characterized in that, The high-voltage distribution box also includes a first sealing element, which is located between the first flange and the box wall of the box assembly. The high-voltage distribution box cover and the box wall of the box assembly form a sealing interface through the first sealing element. The wire hole is located within the inner contour of the orthographic projection of the first sealing element on the box assembly.

10. The battery device according to claim 9, characterized in that, The orthographic projection outline of the first seal on the housing assembly coincides with the orthographic projection outline of the first flange on the housing assembly.

11. The battery device according to claim 9, characterized in that, The first sealing element is provided with a second mounting hole that corresponds one-to-one with the first mounting hole. The first fastener passes through the first mounting hole and the second mounting hole in sequence to install the high voltage distribution box cover and the first sealing element on the box assembly, and compresses and seals the first sealing element between the high voltage distribution box cover and the box wall of the box assembly.

12. The battery device according to claim 8, characterized in that, The high-voltage distribution box also includes a mounting bracket, and the functional components are mounted on at least one of the enclosure assembly and the cover body via the mounting bracket.

13. The battery device according to claim 7, characterized in that, The high-voltage distribution box also includes a high-voltage distribution box base adapted to the high-voltage distribution box cover. The high-voltage distribution box base is mounted on the box assembly and includes a base body and a second flange. The second flange is located around the perimeter of the base body and has a third mounting hole that corresponds one-to-one with the first mounting hole. The first fastener passes through the first mounting hole and the third mounting hole in sequence to mount the high-voltage distribution box cover onto the high-voltage distribution box base. The high-voltage distribution box cover and the high-voltage distribution box base together form a cavity for accommodating the functional device. The functional device is mounted on at least one of the base body and the cover body.

14. The battery device according to claim 13, characterized in that, The base body is provided with a through hole corresponding to the position of the through hole. The first connecting wire harness and the second connecting wire harness are introduced into the receiving cavity from the high voltage distribution box by passing through the through hole and the through hole in sequence.

15. The battery device according to claim 14, characterized in that, The high-voltage distribution box further includes a second sealing element and a third sealing element. The second sealing element is located between the high-voltage distribution box cover and the high-voltage distribution box base, so that a sealing interface is formed between the high-voltage distribution box cover and the high-voltage distribution box base. The third sealing element is located between the high-voltage distribution box base and the box wall of the enclosure assembly, so that a sealing interface is formed between the high-voltage distribution box base and the box wall of the enclosure assembly. Wherein, the wire hole is located within the inner contour of the orthographic projection of the third seal on the housing assembly, and the outer contour of the wire hole on the orthographic projection of the third seal on the housing assembly is located within the inner contour of the orthographic projection of the third seal on the housing assembly.

16. The battery device according to claim 15, characterized in that, The second sealing element is located between the first flange and the second flange. The second sealing element is provided with a fourth mounting hole that corresponds one-to-one with the first mounting hole. The first fastener passes through the first mounting hole, the fourth mounting hole and the third mounting hole in sequence to install the high voltage distribution box cover and the second sealing element on the high voltage distribution box base, and to compress and seal the second sealing element between the high voltage distribution box cover and the high voltage distribution box base.

17. The battery device according to claim 16, characterized in that, The second flange is also provided with a fifth mounting hole, which is alternately distributed with the third mounting hole. The second fastener passes through the fifth mounting hole to install the high voltage distribution box base onto the box assembly. The second sealing element has a clearance groove at the position corresponding to the fifth mounting hole.

18. The battery device according to claim 17, characterized in that, The third sealing element is provided corresponding to the second flange. The third sealing element is provided with a sixth mounting hole that corresponds one-to-one with the fifth mounting hole. The second fastener passes through the fifth mounting hole and the sixth mounting hole in sequence to install the high-voltage distribution box base and the third sealing element on the box assembly, and to compress and seal the third sealing element between the high-voltage distribution box base and the box wall of the box assembly.

19. The battery device according to claim 18, characterized in that, The outer contour of the orthographic projection of the third sealing element on the enclosure assembly coincides with the outer contour of the orthographic projection of the high-voltage distribution box base on the enclosure assembly.

20. The battery device according to claim 15, characterized in that, At least a portion of the outer contour of the third seal's orthographic projection on the housing assembly lies within the outer contour of the base body's orthographic projection on the housing assembly.

21. The battery device according to claim 20, characterized in that, The base body has a seventh mounting hole corresponding to the third sealing member. The third sealing member has an eighth mounting hole corresponding to the seventh mounting hole. The third fastener passes through the seventh mounting hole and the eighth mounting hole in sequence to install the high-voltage distribution box base and the third sealing member on the enclosure assembly, and to compress and seal the third sealing member between the high-voltage distribution box base and the enclosure wall of the enclosure assembly.

22. The battery device according to any one of claims 1-6, characterized in that, The high-voltage distribution box is an irregularly shaped structure manufactured using a die-casting process.

23. The battery device according to any one of claims 1-6, characterized in that, It also includes a maintenance switch, which is located on the same side wall of the housing assembly as the connector, and the maintenance switch is spaced apart from the connector.

24. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-23.

25. An energy storage device, characterized in that, Includes the battery device as described in any one of claims 1-23.

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