Power distribution apparatus, battery apparatus and electrical apparatus

Abstract

Provided in the present application are a power distribution apparatus (400), a battery apparatus (100) and an electrical apparatus. In a first direction (H), a first housing (410), a second housing (420) and a third housing (430) of the power distribution apparatus (400) are sequentially stacked; a first connection portion (451) of an electrical connector (450) is connected to a first end (421) of the second housing (420) and is at least partially exposed through a first opening portion (411), and a second connection portion (452) of the electrical connector (450) is connected to a second end (422) of the second housing (420) and is at least partially exposed through a third opening portion (431). The power distribution apparatus (400) of the embodiments of the present application uses the first housing (410) and the third housing (430) to cover and protect an electrical device (440) and the electrical connector (450), so as to improve the reliability of the power distribution apparatus (400).

Description

Power distribution devices, battery devices and power consumption devices

[0001] This application refers to International Patent Application No. PCT / CN2024 / 131851 filed on November 13, 2024, entitled “Electronic Control Device, Battery Device and Electrical Device”, Chinese Patent Application No. 202420321953.7 filed on February 21, 2024, entitled “High-voltage Control Box and Electrical Device”, and Chinese Patent Application No. 202422219120.2 filed on September 11, 2024, all of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular provides a power distribution device, a battery device, and an electricity-consuming device. Background Art

[0003] The global automotive industry currently faces significant challenges related to energy and the environment. Pure electric vehicles, with their high energy efficiency and environmental friendliness, are increasingly becoming the future direction of the automotive industry. As a core component of electric vehicles, the safety of power batteries directly impacts the overall performance and driving safety of the vehicle.

[0004] A battery system consists of a housing, housing the battery cells, and modules such as a power distribution unit (PDU). The PDU is responsible for charging and discharging the battery cells. Therefore, improving the reliability of the PDU is a key research area in battery technology.

[0005] Application Contents

[0006] The purpose of the embodiments of the present application is to provide a power distribution device, a battery device and a power-consuming device, aiming to improve the reliability of the power distribution device.

[0007] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are:

[0008] In the first aspect, the present application provides a power distribution device, comprising a first shell, a second shell, a third shell, electrical components and electrical connectors, wherein in a first direction, the first shell, the second shell and the third shell are stacked in sequence, the electrical components are arranged on the second shell, and the electrical connectors electrically connect the electrical components; the electrical connectors comprise a first connecting portion and a second connecting portion; the second shell has a first end facing the first shell and a second end facing the third shell, the first connecting portion is connected to the first end, and the second connecting portion is connected to the second end; wherein, a first opening portion is provided on the first shell, the first shell covers the first end, and at least part of the first connecting portion is exposed to the first opening portion; a third opening portion is provided on the third shell, the third shell covers the second end, and at least part of the second connecting portion is exposed to the third opening portion.

[0009] Beneficial effects of the embodiments of the present application: The power distribution device provided by the embodiments of the present application utilizes a second shell to set electrical components and electrical connectors, and utilizes a first shell and a third shell to protect the second shell in a first direction respectively, so as to achieve covering protection of the electrical components and electrical connectors, thereby improving the protection effect of the electrical components and electrical connectors, and further improving the reliability of the power distribution device; at the same time, at least a portion of the first connection portion of the electrical connector is exposed to the first opening portion of the first shell to achieve electrical connection, and at least a portion of the second connection portion is exposed to the third opening portion of the third shell to achieve heat dissipation, so as to achieve the electrical connection requirements and heat dissipation requirements of the power distribution device, and further improve the reliability of the power distribution device.

[0010] In some embodiments, a protective member is provided on the first shell, the protective member cover is provided on the first opening, and the protective member is configured to be able to open the first opening.

[0011] By adopting the above-mentioned technical solution, the protective member can cover the first opening portion, so that the protective member can cover and protect the first connection portion exposed to the first opening portion, so as to further improve the protection performance of the first connection portion. At the same time, the protective member can also open the first opening portion to reduce the impact on the connection operation of the first connection portion.

[0012] In some embodiments, the first connection portion includes a first connection end and a second connection end, the first connection end is used to connect to the battery cell assembly, and the second connection end is used to connect to an electrical device or a charging device.

[0013] By adopting the above technical solution, the first connection end is used to connect the battery monomer assembly, and the second connection end is used to connect the power device or the charging device, so as to realize the charging and discharging management of the battery monomer assembly by the power distribution device.

[0014] In some embodiments, the power distribution device further includes a heat conductor. In the first direction, the heat conductor is disposed on a side of the third shell facing away from the second shell, and the second connection portion is exposed at the third opening to form contact with the heat conductor.

[0015] By adopting the above technical solution, the heat conducting member is used to form contact with the second connection portion exposed at the third opening, and the heat dissipation efficiency of the second connection portion is improved by the heat conducting member to reduce the temperature rise inside the power distribution device.

[0016] In some embodiments, a mounting groove is formed on a surface of the third shell facing away from the second shell, and the heat conducting member is accommodated in the mounting groove; and the third opening is formed on the bottom wall of the mounting groove.

[0017] By adopting the above technical solution, the heat conducting member is accommodated in the installation groove, so as to reduce the size of the heat conducting member protruding from the outer surface of the third shell, thereby reducing the overall size of the power distribution device.

[0018] In some embodiments, the electrical device includes a main relay, the main relay includes a relay body and a high-voltage contact, the relay body is arranged on the second shell, and the high-voltage contact is arranged along the second direction and toward the outside of the second shell, wherein the second direction is perpendicular to the first direction; the electrical connector also includes a third connecting portion, in the second direction, the third connecting portion is located on the side of the second shell close to the high-voltage contact and is connected to the high-voltage contact.

[0019] By adopting the above technical solution, the high-voltage contact of the main relay is arranged along the second direction and toward the outside of the second shell, and the third connecting part is connected to the high-voltage contact on one side of the second shell along the second direction to realize the connection between the electrical connector and the main relay.

[0020] In some embodiments, a covering portion is provided on the third shell. In the second direction, the covering portion is located on a side of the second shell close to the third connecting portion, and the covering portion covers the third connecting portion.

[0021] By adopting the above technical solution, the covering portion is used to cover and protect the third connection portion in the second direction, so as to improve the protection effect of the third connection portion, thereby further improving the reliability of the power distribution device.

[0022] In some embodiments, the electrical device includes a main relay, which includes a relay body and a high-voltage contact. The relay body is arranged on the second shell, and the high-voltage contact is arranged along the first direction and toward the third shell; the high-voltage contact is connected to the second connecting part.

[0023] By adopting the above technical solution, the high-voltage contact of the main relay is arranged along the first direction and toward the third housing, so that the second connecting portion is connected to the high-voltage contact to achieve connection between the electrical connector and the main relay.

[0024] In some embodiments, the third shell includes a bottom shell portion and a first flange portion arranged at the outer edge of the bottom shell portion, and the bottom shell portion and the first flange portion are jointly covered at the second end along the first direction; the bottom shell portion is connected to the second shell, and / or the first flange portion is connected to the second shell; the bottom shell portion is provided with a third opening portion.

[0025] By adopting the above-mentioned technical solution, when the third shell is stacked on the second end of the second shell along the first direction, the bottom shell part and the first flange part can be jointly covered on the second end and connected to the second shell, thereby effectively improving the covering protection effect of the second end of the second shell.

[0026] In some embodiments, there are multiple third openings; in the first direction, a partition is provided on a side wall of the third shell facing away from the second shell, and the partition is provided between two adjacent third openings and is used to separate the two adjacent third openings.

[0027] By adopting the above technical solution, the separator can increase the electrical clearance and creepage distance between adjacent second connecting parts, so as to reduce the probability of short circuit arcing.

[0028] In some embodiments, the first shell includes a top cover portion and a second flange portion arranged at the outer edge of the top cover portion, and the top cover portion and the second flange portion are jointly arranged at the first end along the first direction cover; the top cover portion is connected to the second shell, and / or the second flange portion is connected to the second shell; the top cover portion is provided with a first opening portion.

[0029] By adopting the above technical solution, when the first shell is stacked on the first end of the second shell along the first direction, the top cover part and the second flange part can be jointly covered on the first end, thereby effectively improving the covering protection effect of the first end of the second shell.

[0030] In some embodiments, a plurality of first conductive members arranged at intervals are embedded in the first shell, and a first extension portion is formed between adjacent first conductive members; a first through hole is also provided on the first shell, and the first through hole is located between two opposite first extension portions of two adjacent first conductive members.

[0031] By adopting the above technical solution and providing the first through hole on the first shell, the plurality of first conductors can be exposed at the first through hole, so as to facilitate the handling of the first conductors.

[0032] In some embodiments, a plurality of second conductor members arranged at intervals are embedded in the interior of the first shell, and a second extension portion is formed between adjacent second conductor members; the first shell portion is also provided with a second through hole, and the second through hole is located between two opposite second extension portions of two adjacent second conductor members; the power distribution device also includes a barrier portion, which is inserted into the first through hole and separates the two second extension portions.

[0033] By adopting the above-mentioned technical solution, by providing a second through hole on the second shell, and providing a barrier portion inserted into the first through hole to separate the two opposite second extension portions of two adjacent second conductor parts, the electrical clearance and creepage distance between the two second extension portions of the two adjacent second conductor parts can be effectively guaranteed, thereby reducing the probability of short circuit between the two second extension portions.

[0034] In some embodiments, at least one accommodating cavity is formed on the second shell, and the electrical component is accommodated in the accommodating cavity.

[0035] By adopting the above technical solution, the accommodating cavity is used to accommodate the electrical components for assembly, thereby achieving stable assembly of the electrical components.

[0036] In a second aspect, an embodiment of the present application further provides a battery device comprising a housing, a battery cell assembly and a power distribution device as described above, wherein the battery cell assembly and the power distribution device are housed in the housing, and the power distribution device is electrically connected to the battery cell assembly.

[0037] Beneficial effects of the embodiments of the present application: The battery device provided in the embodiments of the present application includes the above-mentioned power distribution device. On the basis that the above-mentioned power distribution device has better reliability, the reliability of the battery device is also better.

[0038] In some embodiments, the battery device further includes a heat exchange plate, which is attached to the battery cell assembly; the power distribution device includes a heat conductor, which is attached to the heat exchange plate.

[0039] By adopting the above technical solution, the power distribution device can share the heat exchange plate through the heat conducting member to improve the heat dissipation effect of the power distribution device.

[0040] In a third aspect, an embodiment of the present application further provides an electrical device, comprising a battery device as described above, the battery device being used to provide electrical energy.

[0041] Beneficial effects of the embodiments of the present application: The electrical device provided in the embodiments of the present application includes the above-mentioned battery device, thereby improving the reliability of the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0044] FIG2 is an exploded view of a battery device provided in an embodiment of the present application;

[0045] FIG3 is a schematic diagram of the exploded structure of a battery cell provided in an embodiment of the present application;

[0046] FIG4 is a schematic diagram of the overall structure of a power distribution device provided in an embodiment of the present application;

[0047] FIG5 is a schematic structural diagram of a power distribution device provided in an embodiment of the present application when no protective member is provided;

[0048] FIG6 is a partial enlarged schematic diagram of point A in FIG5 ;

[0049] FIG7 is a schematic structural diagram of a power distribution device provided in an embodiment of the present application from another perspective;

[0050] FIG8 is an exploded view of a power distribution device provided in an embodiment of the present application;

[0051] FIG9 is an exploded view of a third housing provided in an embodiment of the present application;

[0052] FIG10 is an exploded view of the first housing provided in an embodiment of the present application;

[0053] FIG11 is a partial enlarged schematic diagram of point B in FIG10;

[0054] FIG12 is a schematic diagram of the exploded structure of the second housing, the electrical components, and the electrical connector when the high-voltage terminal of the main relay is arranged toward the first direction;

[0055] FIG13 is a schematic diagram of the exploded structure of the power distribution device when the high-voltage terminal of the main relay is arranged toward the first direction.

[0056] 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 430, third housing; 4301, bottom housing; 4301a, partition; 4302, first flange; 4302a, cover; 431, third opening; 432, heat conductor; 433, mounting groove; 434, seal; 440, electrical component; 441, main relay; 441a, first main relay; 441b, second main relay; 4411, relay body; 4412, high-voltage contact; 442, fuse; 443, current sensor; 443a, first current sensor; 443b, second current sensor; 444, pre-charge resistor; 445, pre-charge relay; 450, electrical connector; 4501, first conductive sheet; 4502, second conductive sheet; 4503, third conductive sheet; 4504, fourth conductive sheet; 4505, fifth conductive sheet; 4506, sixth conductive sheet; 4507, seventh conductive sheet; 4508, eighth conductive sheet; 4509, ninth conductive sheet; 451, first connecting portion; 451a, first connecting end; 451b, second connecting end; 452, second connecting portion; 453, third connecting portion; H, first direction; D, second direction. DETAILED DESCRIPTION

[0057] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0058] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0060] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0061] Currently, market developments indicate that power batteries are becoming increasingly widely used. Power batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace applications. As the application of power batteries continues to expand, market demand is also growing. A battery device consists of a housing, battery cell assemblies housed within the housing, and modules such as a power distribution unit. The power distribution unit is responsible for charging and discharging the battery cell assemblies. Therefore, improving the reliability of the power distribution unit is a key research area in battery technology.

[0062] Based on the above considerations, and to improve the reliability of a power distribution device, a power distribution device has been designed. By disposing electrical components and electrical connectors on a second housing, and stacking the first, second, and third housings in sequence along a first direction, and utilizing the first and third housings to cover and protect opposite ends of the second housing along the first direction, the device effectively enhances the protection provided to the electrical components and electrical connectors disposed on the second housing, thereby effectively improving the reliability of the power distribution device. Furthermore, at least a portion of the first connecting portion of the electrical connector is exposed through the first opening to achieve electrical connection between the first connecting portion and an external structure; and at least a portion of the second connecting portion of the electrical connector is exposed through the third opening to achieve heat dissipation through exposure of the second connecting portion at the third opening.

[0063] The power distribution device disclosed in the embodiments of the present application can be used in various energy storage systems that use battery devices as power sources or use battery devices as energy storage elements. The power devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0064] An electrical device may refer to a device that uses a power battery as a power source, which provides electrical energy to the device, thereby driving the device to operate. An electrical device is usually equipped with a power distribution device, which is used to control the operation of the high-voltage circuit in the device. The "voltage" in the high-voltage circuit refers to the voltage, and the high-voltage circuit refers to a circuit with a voltage exceeding 60V. For example, the power distribution device may be a high-voltage distribution box, which may refer to a device responsible for distributing and managing the power supply to the high-voltage circuit in the electrical device, such as a PDU (Power Distribution Unit) used in new energy vehicles. The function of the PDU is to distribute and manage the power supply to the high-voltage circuit in the new energy vehicle, providing charging and discharging control, high-voltage component power-on control, circuit overload and short-circuit protection, high-voltage sampling, low-voltage control and other functions for the entire vehicle, thereby protecting and monitoring the operation of the high-voltage circuit. The high-voltage distribution box may also refer to a component used in the battery to control the battery's charging and discharging, such as a BDU (Battery Disconnect Unit). The BDU controls the battery's charging and discharging and is a high-voltage distribution box designed specifically for batteries.

[0065] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0066] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0067] In some embodiments of the present application, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0068] Please refer to Figure 2, which is an exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 described in the embodiments of the present application may include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 may include multiple battery cells 20, which are connected in series, parallel, or in parallel via a busbar.

[0069] In some embodiments, the battery cell assembly 110 is generally formed by arranging a plurality of battery cells 20 .

[0070] As an example, the battery cell assembly 110 may be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 with a cable tie.

[0071] In some embodiments, the battery device may be a battery pack, which includes a case 10 and one or more battery cell assemblies 110 , wherein the battery cell assemblies 110 are housed in the case 10 .

[0072] As an example, the battery cell assembly 110 may be a battery module, and the battery cell assembly 110 may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0073] As an example, the battery cell assembly 110 may also be housed in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0074] As an example, the housing 10 may include a first housing and a second housing. The first and second housings engage to form an enclosed space within the housing 10 for accommodating the battery cell assembly 110. Enclosed here means covered or closed, and may be sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0075] As an example, the box body 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly 110.

[0076] In some embodiments, the box 10 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the box 10 may form at least a portion of the floor of the vehicle 1000, or a portion of the box 10 may form at least a portion of the cross member and longitudinal member of the vehicle 1000.

[0077] The technical solutions described in the embodiments of the present application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0078] In the embodiment of the present application, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0079] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiment of the present application.

[0080] Please refer to Figure 3, which is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application. A battery cell 20 is the smallest unit that makes up a battery device 100. As shown in Figure 3, a battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0081] The end cap 21 is a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cap 21 can be made of a material with a certain degree of hardness and strength (such as an aluminum alloy). This prevents the end cap 21 from deforming when subjected to compression or collision, thereby enhancing the structural strength and reliability of the battery cell 20. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminals 21a can be used to electrically connect to the electrode assembly 23 to output or input electrical energy to the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 21 can also be made of a variety of materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member may be provided inside the end cap 21 to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be made of plastic, rubber, or the like.

[0082] The housing 22 is a component that cooperates with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can be used to accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and end cap 21 can be separate components. An opening can be provided in the housing 22, and the end cap 21 is placed over the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and housing 22 can be integrated. Specifically, the end cap 21 and housing 22 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 22 needs to be enclosed, the end cap 21 is placed over the housing 22. The housing 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylinder, or a hexagonal prism. Specifically, the shape of the housing 22 can be determined based on the specific shape and size of the electrode assembly 23. The housing 22 can be made of a variety of materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0083] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be contained in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 23, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab 23a is connected to the electrode terminal 21a to form a current loop.

[0084] According to some embodiments of the present application, with reference to Figures 4, 5, 7 and 8, an embodiment of the present application provides a power distribution device 400, including a first shell 410, a second shell 420, a third shell 430, an electrical device 440 and an electrical connector 450. In a first direction H, the first shell 410, the second shell 420 and the third shell 430 are stacked in sequence, the electrical connector 450 is arranged on the second shell 420, and the electrical connector 450 is electrically connected to the electrical device 440; the electrical connector 450 includes a first connecting portion 451 and a second connecting portion 452; the second shell 420 has The first connecting portion 451 is connected to the first end 421 toward the first shell 410 and the second end 422 toward the third shell 430, and the second connecting portion 452 is connected to the second end 422; wherein, a first opening portion 411 is provided on the first shell 410, the first shell 410 covers the first end 421, and at least a portion of the first connecting portion 451 is exposed at the first opening portion 411; a third opening portion 431 is provided on the third shell 430, the third shell 430 covers the second end 422, and at least a portion of the second connecting portion 452 is exposed at the third opening portion 431.

[0085] The power distribution device 400 includes a first housing 410, a second housing 420, and a third housing 430. The second housing 420 is used to support the assembly of an electrical component 440. For example, the electrical component 440 can be fixedly assembled to the second housing 420 through a snap-fit ​​connection, plug-in connection, or fastener connection. Alternatively, a receiving structure such as a receiving groove or mounting hole can be provided on the second housing 420 to accommodate the electrical component 440, providing protection and positioning for the electrical component 440.

[0086] In the first direction H, the second shell 420 has a first end 421 and a second end 422. It should be understood that the first end 421 refers to the end of the second shell 420 on one side facing the first shell 410 in the first direction H, and the second end 422 refers to the end of the second shell 420 on the other side facing the third shell 430 in the first direction H; in this way, when the first shell 410, the second shell 420 and the third shell 430 are stacked in sequence in the first direction H, the first shell 410 can cover and protect the first end 421 of the second shell 420, and the third shell 430 can cover and protect the second end 422 of the second shell 420.

[0087] The first shell 410 and the second shell 420 can be connected by means of snap connection, buckle connection, fastener connection, etc.; the second shell 420 and the third shell 430 can be connected by means of snap connection, buckle connection, fastener connection, etc. For example, in some embodiments, the first shell 410 and the second shell 420 can be fixed by fastener connection, that is, the first shell 410 and the second shell 420 are locked and connected along the first direction H by fasteners such as bolts and screws; the second shell 420 and the third shell 430 can be fixed by snap connection, and a snap-fitting protrusion can be provided on the outer peripheral wall surface of the second shell 420 along the first direction H, and a corresponding snap-fitting groove can be provided on the third shell 430. The third shell 430 is stacked on the second shell 420 along the first direction H, and the snap-fitting protrusion is snapped into the snap-fitting groove to achieve connection.

[0088] The first direction H can be any direction of the second housing 420, such as the length direction of the second housing 420, the width direction of the second housing 420, or the height direction of the second housing 420. For ease of description, the height direction of the second housing 420 is used as an example in this application.

[0089] The electrical device 440 may be, but is not limited to, a relay, a fuse, a resistor, a current sensor, or other components. The electrical device 440 is mounted on the second housing 420 and electrically connected via the electrical connector 450. For example, in some embodiments, the electrical device 440 may include a relay and a fuse 442, which are connected in series and electrically connected to the battery cell assembly 110 of the battery device 100 and the electrical device via the electrical connector 450. Thus, the relay and fuse 442 can control the battery cell assembly 110 to supply power to the electrical device, and the fuse 442 can protect the circuit.

[0090] Electrical connector 450 may be a conductive structure used to electrically connect electrical device 440. Optionally, electrical connector 450 may be, but is not limited to, a metal conductor such as copper, aluminum, silver, or gold. For example, in some embodiments, electrical connector 450 may be a copper busbar, copper sheet, or other structure. The number of electrical connectors 450 may be one or more.

[0091] The electrical connector 450 is arranged on the second shell 420, for example, it is fixedly assembled on the second shell 420 by means of snap-on, embedding, fastener connection, etc.; exemplarily, in some embodiments, the electrical connector 450 can be assembled on the outer surface of the second shell 420 and fixedly installed on the second shell 420 by fasteners such as bolts and screws; or, the electrical connector 450 can be partially embedded in the interior of the second shell 420, and the other part is exposed from the second shell 420, and the electrical connector 450 can be fixedly assembled on the second shell 420 by a combination of embedding and fastener fixation.

[0092] The electrical connector 450 includes a first connecting portion 451 and a second connecting portion 452; it should be understood that the first connecting portion 451 refers to a portion of the electrical connector 450, and the first connecting portion 451 can be, but is not limited to, a conductive structure such as a conductive bar or a conductive sheet; the number of first connecting portions 451 can be one or more. The first connecting portion 451 is connected to the first end 421; optionally, the first connecting portion 451 can be fixed to the first end 421 by fasteners such as bolts or screws; or, an embedding groove can be opened on the first end 421, and the first connecting portion 451 can be fixedly embedded in the embedding groove. The first connecting portion 451 can be used to electrically connect to an external structure, for example, it can be electrically connected to the battery cell assembly 110 of the battery device 100, or electrically connected to an electrical device or a charging device, etc.; or, the first connecting portion 451 can also be used to radiate heat outward to achieve heat dissipation purposes.

[0093] The above-mentioned charging device may refer to a device for charging the battery cell assembly 110 , such as a charging pile, a charger, etc.

[0094] Similarly, the second connection portion 452 refers to a portion of the electrical connector 450. The second connection portion 452 can be, but is not limited to, a conductive structure such as a conductive bar or a conductive sheet. The number of second connection portions 452 can be one or more. The second connection portion 452 is connected to the second end 422. Optionally, the second connection portion 452 can be fixed to the second end 422 by fasteners such as bolts or screws. Alternatively, an embedding groove can be provided on the second end 422, and the second connection portion 452 can be fixedly embedded in the embedding groove. The second connection portion 452 can be used to electrically connect to an external structure, such as electrically connecting to the battery cell assembly 110 of the battery device 100, or electrically connecting to an electrical device or a charging device. Alternatively, the second connection portion 452 can also be used to radiate heat outward to achieve heat dissipation.

[0095] For example, in some embodiments, the first connection portion 451 can be used to electrically connect the battery cell assembly 110 of the battery device 100, or to electrically connect an electrical device or a charging device, and the second connection portion 452 can be used to dissipate heat by outward heat radiation; in this way, the electrical device 440 can be connected in series between the battery cell assembly 110 and the electrical device through the first connection portion 451 of the electrical connector 450 to achieve discharge control of the battery device 100; or the electrical device 440 can be connected in series between the battery cell assembly 110 and the charging device through the first connection portion 451 of the electrical connector 450 to achieve charging control of the battery device 100; the second connection portion 452 dissipates heat by outward heat radiation to improve the heat dissipation efficiency of the electrical connector 450 and reduce the temperature rise inside the distribution device 400.

[0096] A first opening 411 is defined on the first shell 410; the first opening 411 refers to a through structure defined along the first direction H on the first shell 410. The number of first openings 411 may be one, two, three, or more than three. The first opening 411 may be defined at any location on the first shell 410, such as in the middle of the first shell 410 or at the outer edge of the first shell 410. Thus, when the first shell 410 is stacked on the second shell 420 along the first direction H, the first shell 410 can cover and protect the first end 421 of the second shell 420. At the same time, the first opening 411 defined on the first shell 410 can expose at least a portion of the first connection portion 451, thereby reducing the impact of the first shell 410 on the wiring operation of the first connection portion 451 or reducing the impact of the first shell 410 on the heat dissipation of the first connection portion 451.

[0097] Optionally, the first connection portion 451 can extend into the first opening portion 411, and at least part of the first connection portion 451 extends out of the first shell 410; or, the first connection portion 451 can extend into the first opening portion 411 and not extend out of the first shell 410; or, the first connection portion 451 does not extend into the first opening portion 411, and the first connection portion 451 is located on the side of the first shell 410 along the first direction H toward the second shell 420.

[0098] For example, in some embodiments, the number of the first opening portions 411 can be three, wherein the first connection portions 451 exposed in two of the first opening portions 411 can be used to electrically connect the positive and negative poles of the battery cell assembly 110, and the first connection portion 451 exposed in the third first opening portion 411 can be used to electrically connect an electrical device or a charging device to achieve charge and discharge control.

[0099] The third housing 430 has a third opening 431 formed therein. The third opening 431 is a through-structure formed along the first direction H. The number of third openings 431 may be one, two, three, or more. The third opening 431 may be located anywhere within the third housing 430, such as in the middle or at the outer edge of the third housing 430. Thus, when the third housing 430 is stacked on the second housing 420 along the first direction H, the third housing 430 can cover and protect the second end 422 of the second housing 420. At the same time, the third opening 431 formed in the third housing 430 can expose at least a portion of the second connection portion 452, thereby reducing the impact of the third housing 430 on the wiring operation of the second connection portion 452 or reducing the impact of the third housing 430 on the heat dissipation of the second connection portion 452.

[0100] Optionally, the second connection portion 452 can extend into the third opening portion 431, and at least part of the second connection portion 452 extends out of the third shell 430; or, the second connection portion 452 can extend into the third opening portion 431 and not extend out of the third shell 430; or, the second connection portion 452 does not extend into the third opening portion 431, and the second connection portion 452 is located on the side of the third shell 430 along the first direction H toward the second shell 420.

[0101] For example, in some embodiments, the number of the third openings 431 may be seven, and the seven third openings 431 are used to expose the second connection parts 452 at different positions, so as to improve the heat dissipation effect of the second connection parts 452 .

[0102] The power distribution device 400 provided in the embodiment of the present application utilizes the second shell 420 to set the electrical device 440 and the electrical connector 450, and utilizes the first shell 410 and the third shell 430 to protect the second shell 420 in the first direction H respectively, so as to achieve covering protection of the electrical device 440 and the electrical connector 450, thereby improving the protection effect of the electrical device 440 and the electrical connector 450, and further improving the reliability of the power distribution device 400; at the same time, at least a portion of the first connection portion 451 of the electrical connector 450 is exposed to the first opening portion 411 of the first shell 410 to achieve electrical connection, and at least a portion of the second connection portion 452 is exposed to the third opening portion 431 of the third shell 430 to achieve heat dissipation, so as to achieve the electrical connection requirements and heat dissipation requirements of the power distribution device 400, and further improve the reliability of the power distribution device 400.

[0103] 4 , 5 and 8 , in some embodiments, a protective member 412 is provided on the first shell 410 . The protective member 412 covers the first opening 411 and is configured to open the first opening 411 .

[0104] The protective member 412 may be an insulating structure with good insulation performance; alternatively, the protective member 412 may be a protective cover, a protective plate, a protective net, or other structure capable of covering and protecting the first opening 411. For example, in some embodiments, the protective member 412 may be a protective cover structure that is arranged to cover the first opening to provide enhanced protection for the first connecting portion 451 exposed in the first opening 411.

[0105] It should be understood that when the number of the first opening portions 411 is one or more, the number of the protective member 412 can be one, and one protective member 412 can be used to cover and protect one or more first opening portions 411 at the same time; or, when the number of the first opening portions 411 is multiple, the number of the protective members 412 can be the same as the number of the first opening portions 411, and each first opening portion 411 is provided with a protective member 412 for covering and protecting.

[0106] The protective member 412 can be connected to the first housing 410 by various detachable connection methods such as hinged connection, snap connection, plug-in connection, etc. In this way, when it is necessary to operate the first connection portion 451 exposed in the first opening portion 411, the protective member 412 can be rotated or removed to open the first opening portion 411, thereby reducing the impact of the protective member 412 on the operation of the first connection portion 451. For example, in some embodiments, the protective member 412 can be a protective cover, which is located in the first opening portion 411 and hinged to the inner peripheral wall of the first opening portion 411. In this way, the protective cover can be installed in the first opening portion 411 and cover and protect the first connection portion 451 exposed in the first opening portion 411. At the same time, the protective cover can be rotated to open the first opening portion 411 to expose the first connection portion 451.

[0107] With this arrangement, the protective member 412 covers the first opening 411 to enhance the protection performance of the first connection portion 451 . Meanwhile, the protective member 412 can also open the first opening 411 to reduce the impact on the connection operation of the first connection portion 451 .

[0108] 5 and 8 , in some embodiments, the first connection portion 451 includes a first connection end 451 a and a second connection end 451 b . The first connection end 451 a is used to connect to the battery cell assembly 110 , and the second connection end 451 b is used to connect to an electrical device or a charging device.

[0109] The first connection end 451a and the second connection end 451b refer to different connection ends of the first connection portion 451. It should be understood that the electrical connector 450 is used to electrically connect to the electrical device 440; therefore, the first connection end 451a and the second connection end 451b can be connected to two portions of the electrical connector 450 located at opposite ends of the electrical device 440. In this way, when the first connection end 451a is connected to the battery cell assembly 110 and the second connection end 451b is connected to an electrical device or charging device, the electrical device 440 can be connected in series between the battery cell assembly 110 and the electrical device or charging device to achieve charge and discharge control.

[0110] In some embodiments, there are two first connection terminals 451a, and the two first connection terminals 451a are respectively used to electrically connect the positive electrode and the negative electrode of the battery cell assembly 110. At the same time, the two first connection terminals 451a can be arranged at any position of the first end 421. For example, the two first connection terminals 451a can be respectively arranged at the opposite ends of the first end 421 perpendicular to the first direction H.

[0111] In some embodiments, there may be two second connection terminals 451b, with the two first connection terminals 451a being used to electrically connect to the positive and negative electrodes of an electrical device, or to electrically connect to the positive and negative electrodes of a charging device, respectively. In this way, the power distribution device 400 can control the charging and discharging of the battery cell assembly 110. Furthermore, the two second connection terminals 451b can be arranged at any location on the first end 421. For example, the two second connection terminals 451b can be arranged close together and exposed simultaneously in the same first opening 411 to facilitate wiring operations.

[0112] With this configuration, the first connection end 451 a is used to connect the battery cell assembly 110 , and the second connection end 451 b is used to connect the power-consuming device or the charging device, so that the power distribution device 400 can manage the charge and discharge of the battery cell assembly 110 .

[0113] Referring to Figures 7 to 9, in some embodiments, the power distribution device 400 further includes a heat conductive member 432. In the first direction H, the heat conductive member 432 is disposed on a side of the third shell 430 that is away from the second shell 420, and the second connection portion 452 is exposed at the third opening 431 to form contact with the heat conductive member 432.

[0114] It can be understood that the heat conductor 432 refers to a structural component with good thermal conductivity. The function of the heat conductor 432 is to transfer heat from the second connecting part 452. For example, the heat conductor 432 can be a heat conducting plate, a heat conducting block, a heat conducting sheet, etc. The material of the heat conductor 432 can be resin, rubber, silicone, etc.

[0115] The heat conducting member 432 is disposed on a side of the third housing 430 facing away from the second housing 420. Optionally, the heat conducting member 432 can be assembled to the third housing 430 by bonding, fastener connection, snap connection, plug-in connection, or the like. Furthermore, by assembling the heat conducting member 432 on the side of the third housing 430 facing away from the second housing 420, the heat conducting member 432 can abut against and contact the second connecting portion 452 exposed at the third opening 431. In this way, heat can be transferred from the second connecting portion 452 to the heat conducting member 432, thereby improving heat dissipation efficiency.

[0116] With this arrangement, the heat conducting member 432 is in contact with the second connection portion 452 exposed at the third opening 431 , thereby improving the heat dissipation efficiency of the second connection portion 452 and reducing the temperature rise inside the power distribution device 400 .

[0117] 7 and 9 , in some embodiments, a mounting groove 433 is defined on a surface of the third housing 430 facing away from the second housing 420 , and the heat conducting member 432 is accommodated in the mounting groove 433 ; the third opening 431 is defined on the bottom wall of the mounting groove 433 .

[0118] The mounting groove 433 refers to a recessed structure formed on one side of the third housing 430 facing away from the second housing 420; the mounting groove 433 is used to accommodate the heat conductor 432. Optionally, the mounting groove 433 may be, but is not limited to, a circular groove, a polygonal groove such as a rectangular groove, or a special-shaped groove, among other configurations. The number of mounting grooves 433 may be one, with all third openings 431 being defined on the bottom wall of the mounting groove 433; or the number of mounting grooves 433 may be any number of two or more, with each mounting groove 433 having at least one third opening 431 defined on its bottom wall.

[0119] When the heat conductive member 432 is accommodated in the mounting groove 433, the heat conductive member 432 can be fixed by gluing, or the heat conductive member 432 can be fixed by snap connection, plug-in connection, etc. Optionally, the heat conductive member 432 can be completely accommodated in the mounting groove 433, that is, the outer surface of the heat conductive member 432 does not exceed the notch range of the mounting groove 433, or the outer surface of the heat conductive member 432 is flush with the notch of the mounting groove 433, that is, flush with the side surface of the third shell 430 facing away from the second shell 420; alternatively, the heat conductive member 432 can be partially accommodated in the mounting groove 433, and the other part of the heat conductive member 432 extends outside the mounting groove 433.

[0120] In this configuration, by accommodating the heat conductor 432 in the installation groove 433, the size of the heat conductor 432 protruding from the outer surface of the third shell 430 is reduced, thereby reducing the overall size of the distribution device 400, so as to reduce the impact of the distribution device 400 on the energy density of the battery device 100 when it is used in the battery device 100.

[0121] In some embodiments, a seal 434, such as a sealing strip, a sealing ring, or other sealing structure, may be further provided in the mounting groove 433; the seal 434 is provided between the heat conductor 432 and the bottom wall of the mounting groove 433 and the portion where the third opening 431 is provided is enclosed therein, thereby effectively improving the sealing and protection effect of the third opening 431 and reducing the probability of water mist or particles entering the third shell 430 from the third opening 431.

[0122] Please refer to Figures 8 and 12. In some embodiments, the electrical device 440 includes a main relay 441, the main relay 441 includes a relay body 4411 and a high-voltage contact 4412, the relay body 4411 is arranged on the second shell 420, and the high-voltage contact 4412 is arranged along the second direction D and toward the outside of the second shell 420, wherein the second direction D is perpendicular to the first direction H; the electrical connector 450 also includes a third connecting portion 453, in the second direction D, the third connecting portion 453 is located on the side of the second shell 420 close to the high-voltage contact 4412 and is connected to the high-voltage contact 4412.

[0123] The main relay 441 can refer to an electrical device that connects or disconnects a circuit based on changes in input quantities (for example, physical quantities such as voltage, current, temperature, speed, or time). The main relay 441 includes a relay body 4411 and a high-voltage contact 4412, wherein the relay body 4411 includes components such as a housing, an electromagnet, and a coil. When the input quantity of the input coil reaches a specified value, the electromagnet moves under the magnetic force of the coil, and the movement of the electromagnet drives the movement of the high-voltage contact 4412, thereby changing the on / off state of the controlled circuit. In some embodiments, the main relay 441 can control the on / off state of the circuit between the battery cell assembly 110 and the power device or charging device, thereby controlling the charging and discharging of the battery cell assembly 110. Optionally, the number of main relays 441 can be one or more.

[0124] The relay body 4411 is mounted on the second housing 420. Optionally, a mounting structure such as a receiving groove or mounting hole may be provided on the second housing 420 to accommodate the relay body 4411. The relay body 4411 may be secured to the second housing 420 using fasteners. The high-voltage contact 4412 is positioned along the second direction D and toward the exterior of the second housing 420. Thus, the third connecting portion 453 of the electrical connector 450 is positioned on a side of the second housing 420 proximate to the high-voltage contact 4412 and connects to the high-voltage contact 4412, thereby electrically connecting the main relay 441.

[0125] The second direction D is a direction perpendicular to the first direction H. The second direction D may be, but is not limited to, the length, width, or height of the second housing 420. For example, in some embodiments, the first direction H of the second housing 420 may be the height direction of the second housing 420, and the second direction D of the second housing 420 may correspond to the width direction of the second housing 420.

[0126] The third connection portion 453 refers to a portion of the electrical connector 450 and can be, but is not limited to, a conductive structure such as a conductive bar or a conductive sheet. There can be two or more third connection portions 453 , each of which is used to electrically connect the two terminals of the high-voltage contact 4412 and other electrical components 440 . In some embodiments, the third connection portion 453 can be fastened to the high-voltage contact 4412 using fasteners.

[0127] In this way, the high-voltage contact 4412 of the main relay 441 is arranged along the second direction D and toward the outside of the second shell 420, and the third connecting part 453 is connected to the high-voltage contact 4412 on one side of the second shell 420 along the second direction D to realize the connection between the electrical connector 450 and the main relay 441.

[0128] For example, referring to Figure 12, in some embodiments, the electrical device 440 includes a main relay 441, a fuse 442 and a current sensor 443, the number of the main relays 441 is two, namely the first main relay 441a and the second main relay 441b, and the number of the current sensors 443 is also two, namely the first current sensor 443a and the second current sensor 443b; the electrical connector 450 includes a first conductive plate 4501, a second conductive plate 4502, a third conductive plate 4503, a fourth conductive plate 4504 and a fifth conductive plate 4505 for respectively connecting the first main relay 441a, the first current sensor 443a and the fuse 442, and the electrical connector 450 also includes a sixth conductive plate 4506, a seventh conductive plate 4507, an eighth conductive plate 4508 and a ninth conductive plate 4509 for respectively connecting the second main relay 441b and the second current sensor 443b.

[0129] One end of the first conductive sheet 4501 is connected to the first end 421 of the second shell 420, and the first conductive sheet 4501 is used to electrically connect to the positive electrode of the battery cell assembly 110; the first current sensor 443a is arranged on the second conductive sheet 4502, one end of the second conductive sheet 4502 is connected to the first conductive sheet 4501, and the other end of the second conductive sheet 4502 is connected to the third conductive sheet 4503; one end of the fuse 442 is electrically connected to the third conductive sheet 4503, and the other end of the fuse 442 is electrically connected to the fourth conductive sheet 4504; one of the connection terminals of the high-voltage contact of the first main relay 441a is connected to the fourth conductive sheet 4504, and the other connection terminal of the high-voltage contact of the first main relay 441a is connected to the fifth conductive sheet 4505.

[0130] One end of the sixth conductive plate 4506 is connected to the first end 421 of the second shell 420, and the sixth conductive plate 4506 is used to electrically connect to the negative pole of the battery cell assembly 110; the opposite ends of the second current sensor 443b are respectively connected to the seventh conductive plate 4507 and the eighth conductive plate 4508, wherein the seventh conductive plate 4507 is also connected to the sixth conductive plate 4506, and the eighth conductive plate 4508 is also electrically connected to one of the terminals of the high-voltage contact of the second main relay 441b; the other terminal of the high-voltage contact of the second main relay 441b is electrically connected to the ninth conductive plate 4509.

[0131] Among them, the third conductive sheet 4503, the fourth conductive sheet 4504, the fifth conductive sheet 4505, the eighth conductive sheet 4508 and the ninth conductive sheet 4509 can all be bent toward the second end 422 of the second shell 420 and connected to the second end 422 to achieve the purpose of heat dissipation at the second end 422; that is, the part where the third conductive sheet 4503, the fourth conductive sheet 4504, the fifth conductive sheet 4505, the eighth conductive sheet 4508 and the ninth conductive sheet 4509 are bent toward the second end 422 of the second shell 420 and connected to the second end 422 is the second connecting portion 452.

[0132] The first conductive sheet 4501, the fifth conductive sheet 4505, the sixth conductive sheet 4506 and the ninth conductive sheet 4509 can all be bent toward the first end 421 of the second shell 420 and connected to the first end 421 to achieve the purpose of electrical connection with the external structure; that is, the first conductive sheet 4501, the fifth conductive sheet 4505, the sixth conductive sheet 4506 and the ninth conductive sheet 4509 are bent toward the first end 421 of the second shell 420 and connected to the first end 421 as the first connecting portion 451; and the first conductive sheet 4501 The first connection part 451 formed by the fifth conductive sheet 4505 and the sixth conductive sheet 4506 is the first connection end 451a. The first conductive sheet 4501 is used to electrically connect the positive electrode of the battery cell assembly 110, and the sixth conductive sheet 4506 is used to electrically connect the negative electrode of the battery cell assembly 110; the second connection part 452 formed by the fifth conductive sheet 4505 and the ninth conductive sheet 4509 is the second connection end 451b. The fifth conductive sheet 4505 is used to electrically connect the positive electrode of the electrical device or the charging device, and the ninth conductive sheet 4509 is used to electrically connect the negative electrode of the electrical device or the charging device.

[0133] It should be understood that the above-mentioned electrical device 440 can also include a pre-charging resistor 444 and a pre-charging relay 445. After the pre-charging resistor 444 and the pre-charging relay 445 are connected in series through a conductor, one end is electrically connected to the fourth conductive plate 4504, and the other end is electrically connected to the fifth conductive plate 4505 to achieve protection against transient impacts.

[0134] 8 and 9 , in some embodiments, a covering portion 4302 a is provided on the third shell 430 . In the second direction D, the covering portion 4302 a is located on a side of the second shell 420 close to the third connecting portion 453 , and the covering portion 4302 a covers the third connecting portion 453 .

[0135] The covering portion 4302a refers to a protective portion extending along the first direction H on the third shell 430; it should be understood that when the third shell 430 is stacked on the second shell 420 along the first direction H, the covering portion 4302a can be located on one side of the second shell 420 along the second direction D and cover the third connecting portion 453.

[0136] Optionally, the covering portion 4302a may be integrally formed on the second shell 420, or the covering portion 4302a may be fixed to the second shell 420 by fastener connection, bonding, snap connection, hot melt connection, etc.

[0137] With this configuration, the covering portion 4302 a is used to cover and protect the third connection portion 453 in the second direction D, thereby improving the protection effect of the third connection portion 453 and further improving the reliability of the power distribution device 400 .

[0138] Please refer to Figure 13. In some embodiments, the electrical device 440 includes a main relay 441, which includes a relay body 4411 and a high-voltage contact 4412. The relay body 4411 is arranged on the second shell 420, and the high-voltage contact 4412 is arranged along the first direction H and toward the third shell 430; the high-voltage contact is connected to the second connecting part 452.

[0139] In this embodiment, the high-voltage contact 4412 of the main relay 441 is arranged along the first direction H and toward the third shell 430, and the high-voltage contact 4412 and the second connecting portion 452 are located on the same side of the second shell 420; in this way, the second connecting portion 452 can be electrically connected to the high-voltage contact 4412.

[0140] In this configuration, the high-voltage contact 4412 of the main relay 441 is arranged along the first direction H and toward the third housing 430 , so that the second connecting portion 452 is connected to the high-voltage contact 4412 to achieve connection between the electrical connector 450 and the main relay 441 .

[0141] Please refer to Figures 8 and 9. In some embodiments, the third shell 430 includes a bottom shell portion 4301 and a first flange portion 4302 arranged at the outer edge of the bottom shell portion 4301. The bottom shell portion 4301 and the first flange portion 4302 are jointly covered at the second end 422 along the first direction H; the bottom shell portion 4301 is connected to the second shell 420, and / or the first flange portion 4302 is connected to the second shell 420; the bottom shell portion 4301 is provided with a third opening portion 431.

[0142] The bottom shell portion 4301 serves as the main body of the third shell 430. When the third shell 430 is stacked on the second shell 420, the bottom shell portion 4301 can cover the second end 422 of the second shell 420 to provide protection. Optionally, the bottom shell portion 4301 can be a plate structure, such as a rectangular plate, a circular plate, or other configurations.

[0143] The outer edge of the bottom shell portion 4301 is folded toward the first direction H to form a first flange portion 4302; optionally, the first flange portion 4302 is formed on the entire outer edge of the bottom shell portion 4301, or the first flange portion 4302 is formed on part of the outer edge of the bottom shell portion 4301.

[0144] In the first direction H, the bottom shell portion 4301 and the first flange portion 4302 are jointly covered on the second end 422; optionally, in some embodiments, the first flange portion 4302 abuts against the surface of the second end 422, so that a certain gap is formed between the bottom shell portion 4301 and the second end 422, and the gap between the bottom shell portion 4301 and the second end 422 can be used to accommodate the assembly of the electrical device 440 or the electrical connector 450; or, in other embodiments, the first flange portion 4302 can cover part of the outer peripheral wall surface of the second shell 420 around the first direction H, so that the bottom shell portion 4301 and the first flange portion 4302 provide more sufficient protection for the second end 422.

[0145] Among them, the bottom shell part 4301 is connected to the second shell 420; optionally, the bottom shell part 4301 can be fixedly connected to the second shell 420 by locking fasteners. For example, in some embodiments, a connecting part for locking fasteners such as bolts or screws can be provided on the bottom shell part 4301, and the connecting part is arranged toward the second end 422. In this way, the connecting part and the second end 422 can be locked and fixed by fasteners; alternatively, the bottom shell part 4301 can also be fixedly connected to the second shell 420 by snap connection, plug-in, etc.

[0146] Alternatively, the first flange portion 4302 is connected to the second shell 420; optionally, the first flange portion 4302 can be fixedly connected to the second shell 420 by a snap connection. For example, in some embodiments, a snap-fitting protrusion can be provided on the outer peripheral wall surface of the second shell 420 around the first direction H, and a snap-fitting groove can be provided on the first flange portion 4302. In this way, the connection between the first flange portion 4302 and the second shell 420 can be achieved by inserting the snap-fitting protrusion into the snap-fitting groove; alternatively, the first flange portion 4302 can also be fixed to the second shell 420 by means of a locking fastener.

[0147] In this way, when the third shell 430 is stacked on the second end 422 of the second shell 420 along the first direction H, the bottom shell portion 4301 and the first flange portion 4302 can be jointly covered on the second end 422 and connected to the second shell 420, thereby effectively improving the covering and protective effect of the second end 422 of the second shell 420.

[0148] Please refer to Figures 7 to 9. In some embodiments, there are multiple third opening portions 431. In the first direction H, a partition portion 4301a is provided on a side wall of the third shell 430 that is away from the second shell 420. The partition portion 4301a is provided between two adjacent third opening portions 431 and is used to separate the two adjacent third opening portions 431.

[0149] The partition 4301a is a protruding structure provided on a side wall of the third housing 430 that faces away from the second housing 420 along the first direction H. The partition 4301a can be fixed to the third housing 430 by fastener locking, snap connection, heat fusion connection, etc. Alternatively, the partition 4301a can be formed on the third housing 430 by integral injection molding.

[0150] Optionally, the number of the partitions 4301 a may be one, two, or any number of the above; one or more partitions 4301 a may be provided between two adjacent third openings 431 .

[0151] It should be understood that when the mounting groove 433 is defined on a surface of the third housing 430 facing away from the second housing 420, the partition 4301a is disposed on the bottom wall of the mounting groove 433. Alternatively, the partition 4301a may be located within the mounting groove 433 so as not to extend beyond the mounting groove 433 in the first direction H; or the partition 4301a may extend beyond the mounting groove 433 along the first direction H.

[0152] With this configuration, when the second connection portion 452 is exposed at the third opening 431 , the partition portion 4301 a can increase the electrical clearance and creepage distance between adjacent second connection portions 452 , thereby reducing the probability of short circuit arcing.

[0153] Please refer to Figures 8 and 10. In some embodiments, the first shell 410 includes a top cover portion 4101 and a second flange portion 4102 arranged at the outer edge of the top cover portion 4101. The top cover portion 4101 and the second flange portion 4102 are jointly arranged at the first end 421 along the first direction H cover; the top cover portion 4101 is connected to the second shell 420, and / or the second flange portion 4102 is connected to the second shell 420; the top cover portion 4101 is provided with a first opening portion 411.

[0154] The top cover 4101 serves as the main body of the first housing 410. When the first housing 410 is stacked on the second housing 420, the top cover 4101 can cover the first end 421 of the second housing 420 to provide protection. Optionally, the top cover 4101 can be a plate structure, such as a rectangular plate, a circular plate, or other configurations.

[0155] The outer edge of the top cover portion 4101 is folded toward the first direction H to form a second flange portion 4102; optionally, the second flange portion 4102 is formed on the entire outer edge of the top cover portion 4101, or the second flange portion 4102 is formed on part of the outer edge of the top cover portion 4101.

[0156] In the first direction H, the top cover portion 4101 and the second flange portion 4102 are jointly covered on the first end 421; optionally, in some embodiments, the second flange portion 4102 abuts against the surface of the first end 421, so that a certain gap is formed between the top cover portion 4101 and the first end 421, and the gap between the top cover portion 4101 and the first end 421 can be used to accommodate the assembly of the electrical device 440 or the electrical connector 450; or, in other embodiments, the second flange portion 4102 can cover part of the outer peripheral wall surface of the second shell 420 around the first direction H, so that the top cover portion 4101 and the second flange portion 4102 provide more sufficient protection for the first end 421.

[0157] Optionally, in some embodiments, the first flange portion 4302, the second flange portion 4102, and the peripheral wall surface of the second shell 420 around the first direction H can be flush, so that the exterior of the entire distribution device 400 forms a relatively flat surface to improve assembly convenience.

[0158] Among them, the top cover part 4101 is connected to the second shell 420; optionally, the top cover part 4101 can be fixedly connected to the second shell 420 by locking fasteners. For example, in some embodiments, a connecting part for locking fasteners such as bolts or screws can be provided on the top cover part 4101, and the connecting part is arranged toward the first end 421. In this way, the connecting part and the first end 421 can be locked and fixed by fasteners; alternatively, the top cover part 4101 can also be fixedly connected to the second shell 420 by snap connection, plug-in, etc.

[0159] Alternatively, the second flange portion 4102 is connected to the second shell 420; optionally, the second flange portion 4102 can be fixedly connected to the second shell 420 by a snap connection. For example, in some embodiments, a snap-fitting protrusion can be provided on the outer peripheral wall surface of the second shell 420 around the first direction H, and a snap-fitting groove can be provided on the second flange portion 4102. In this way, the connection between the second flange portion 4102 and the second shell 420 can be achieved by inserting the snap-fitting protrusion into the snap-fitting groove; alternatively, the second flange portion 4102 can also be fixed to the second shell 420 by means of a locking fastener.

[0160] In this arrangement, when the first shell 410 is stacked on the first end 421 of the second shell 420 along the first direction H, the top cover portion 4101 and the second flange portion 4102 can be jointly covered on the first end 421, thereby effectively improving the covering and protective effect of the first end 421 of the second shell 420.

[0161] Please refer to Figures 5, 6 and 10. In some embodiments, a plurality of first conductive members 413 are embedded in the first shell 410, and a first extension portion 4131 is formed between adjacent first conductive members 413. The first shell 410 also defines a first through hole 410a, which is located between two opposite first extension portions 4131 of two adjacent first conductive members 413.

[0162] The first conductor 413 is a conductive structure with excellent conductivity. Alternatively, the first conductor 413 may be a conductive sheet, a conductive wire, or other conductive structure. There may be multiple first conductors 413, for example, two, three, four, or more, arranged in intervals. It should be understood that the first conductor 413 can be electrically connected to the electrical device 440 to achieve low-voltage sampling and detection.

[0163] The distribution direction of the first conductor 413 is a direction parallel to any plane perpendicular to the first direction H. For example, it can be, but is not limited to, parallel to the second direction D. Thus, a plurality of first conductors 413 can be distributed in sequence within the first shell 410 .

[0164] The first conductor 413 is embedded within the first housing 410. Specifically, after multiple first conductors 413 are spaced apart, the first housing 410 is formed by injection molding the first conductors 413. In this manner, the first conductors 413 are embedded within the housing. In some embodiments, to position and embed the spaced apart first conductors 413, first connecting ribs can be provided between adjacent first conductors 413, thereby integrating the first conductors 413. After injection molding the first housing 410, the first connecting ribs are severed at the first through-hole 410a to disconnect adjacent first conductors 413. The severed first connecting ribs form the first extensions 4131 on the first conductors 413. It should be understood that, based on the method for severing the first connecting ribs, the first connecting ribs formed between the multiple first conductors 413 should be exposed at the first through-hole 410a, facilitating severing the first connecting ribs at the first through-hole 410a.

[0165] Optionally, the first through holes 410a may be of various shapes such as circular holes, waist-shaped holes, rectangular holes, etc. The number of the first through holes 410a should be consistent with the number of the first connecting bars, so that all the first connecting bars can be cut through each first through hole 410a.

[0166] In this manner, by providing the first through hole 410 a on the first housing, the plurality of first conductive members 413 can be exposed at the first through hole 410 a , so as to facilitate handling of the first conductive members 413 .

[0167] Please refer to Figures 5, 10 and 11. In some embodiments, a plurality of spaced-apart second conductors 414 are embedded in the first shell 410, and a second extension portion 4141 is formed between adjacent second conductors 414. The first shell 410 is also provided with a second through hole 410b, and the second through hole 410b is located between two opposite second extension portions 4141 of two adjacent second conductors 414. The power distribution device 400 also includes a barrier portion 415, which is inserted into the first through hole 410a and is used to separate the two second extension portions 4141.

[0168] The second conductor 414 is a conductive structure with excellent conductivity. Alternatively, the second conductor 414 can be a conductive sheet, a conductive wire, or other conductive structure. There can be multiple second conductors 414, for example, two, three, four, or more, arranged in intervals. It should be understood that the second conductor 414 can be electrically connected to the electrical connector 450 to achieve high-voltage sampling and detection.

[0169] The distribution direction of the second conductor 414 is a direction parallel to any plane perpendicular to the first direction H. For example, it can be, but is not limited to, parallel to the second direction D. Thus, a plurality of second conductors 414 can be distributed in sequence within the first shell 410 .

[0170] The second conductor 414 is embedded within the first housing 410. Specifically, after multiple second conductors 414 are spaced apart, the first housing 410 is formed by injection molding the second conductors 414. In this manner, the second conductors 414 are embedded within the first housing 410. In some embodiments, to position and embed the multiple second conductors 414, a second connecting rib can be provided between adjacent second conductors 414, thereby integrating the multiple second conductors 414. After injection molding the second housing 420, the second connecting rib is severed at the second through-hole 410b to disconnect adjacent second conductors 414. The severed second connecting rib forms a second extension 4141 on the second conductor 414. It should be understood that, depending on how the second connecting rib is severed, the second extension 4141 can be exposed outside the corresponding second through-hole 410b, or it can be flush with the inner wall of the second through-hole 410b.

[0171] Optionally, the second through holes 410b may be of various shapes such as circular holes, waist-shaped holes, rectangular holes, etc. The number of the second through holes 410b should be consistent with the number of the second connecting bars, so that all the second connecting bars can be cut through each second through hole 410b.

[0172] Among them, the size N of the second through hole 410b refers to the size of the hole of the second through hole 410b along the distribution direction of the second conductor 414; for example, when the second through hole 410b is a rectangular hole, the size N of the second through hole 410b is the size of the hole of the second through hole 410b along the distribution direction of the second conductor 414; when the second through hole 410b is a circular hole, the size N of the second through hole 410b is the aperture of the second through hole 410b.

[0173] The barrier portion 415 refers to a structure with excellent insulation performance, such as an insulating bump or insulating sheet; the number of barrier portions 415 can be one, two, or more. Optionally, the barrier portion 415 can be provided at the second end 422 of the second shell 420. When the first shell 410 is stacked on the second shell 420, the barrier portion 415 will be inserted into the corresponding second through hole 410b and separate the two second extensions 4141 at the second through hole 410b. Alternatively, an insert plate can be provided on the outer wall of the first shell 410 facing away from the second shell 420, and the barrier portion 415 can be provided on the insert plate. When the insert plate is assembled on the first shell 410, the barrier portion 415 can be inserted into the corresponding second through hole 410b.

[0174] In this way, by setting a second through hole 410b on the second shell 420 and setting a barrier portion 415 inserted into the first through hole 410a to separate the two opposite second extension portions 4141 of two adjacent second conductor members 414, the electrical clearance and creepage distance between the two second extension portions 4141 of the two adjacent second conductor members 414 can be effectively guaranteed, so as to reduce the probability of short circuit between the two second extension portions 4141.

[0175] 8 and 12 , in some embodiments, at least one accommodating cavity 4201 is formed on the second housing 420 , and the electrical device 440 is accommodated in the accommodating cavity 4201 .

[0176] The second housing 420 may be provided with one, two, or more accommodating cavities 4201, and the one or more accommodating cavities 4201 may be used to accommodate electrical components 440, thereby enabling assembly and connection of the electrical components 440. One accommodating cavity 4201 may accommodate one electrical component 440, or two or more electrical components 440 may be accommodated in one accommodating cavity 4201.

[0177] Optionally, the accommodating cavity 4201 can be opened at the first end 421, and the first end 421 is recessed inward to form one or more accommodating cavities 4201; or, the accommodating cavity 4201 can be opened at the second end 422, and the second end 422 is recessed inward to form one or more accommodating cavities 4201; or, multiple accommodating cavities 4201 are staggered on the first end 421 and the second end 422, and in the second direction D of the second shell 420.

[0178] For example, in some embodiments, the electrical device 440 includes a first current sensor 443a, a second current sensor 443b, a first main relay 441a, a second main relay 441b, a fuse 442, a pre-charge relay 445, and a pre-charge resistor 444. The first end 421 of the second housing 420 defines a first accommodating cavity and a second accommodating cavity, which respectively accommodate the pre-charge relay 445 and the pre-charge resistor 444. The second end 422 of the second housing 420 defines a third accommodating cavity, a fourth accommodating cavity, and a fifth accommodating cavity, which respectively accommodate the first current sensor 443a, the fuse 442, and the second current sensor 443b. Furthermore, in the second direction D, the second housing 420 further defines a sixth accommodating cavity and a seventh accommodating cavity, which respectively accommodate the first main relay 441a and the second main relay 441b. This allows for compact assembly of the electrical device 440.

[0179] Below, the power distribution device 400 provided in this application will be described in detail according to specific implementation methods.

[0180] Referring to Figures 4 to 12, in this embodiment, a power distribution device 400 includes electrical components 440, electrical connectors 450, and a first housing 410, a second housing 420, and a third housing 430 stacked in sequence along a first direction H. The first direction H may refer to the height of the second housing 420. The electrical components 440 include a first current sensor 443a, a second current sensor 443b, a pre-charge relay 445, a pre-charge resistor 444, a first main relay 441a, a second main relay 441b, and a fuse 442. The second housing 420 defines a plurality of cavities 4201 for accommodating the aforementioned electrical components 440. In this embodiment, the first and second main relays 441a, 441b are both mounted on the second housing 420 along a second direction D, with the high-voltage contacts 4412 of each of the first and second main relays 441a, 441b exposed in the second direction D. The second direction D may refer to the width of the second housing 420.

[0181] The second housing 420 further includes a first end 421 extending in the first direction H toward the first housing 410, and a second end 422 extending in the first direction H toward the third housing 430. The electrical connector 450 includes a first connecting portion 451, a second connecting portion 452, and a third connecting portion 453. The first connecting portion 451 can be fastened to the first end 421 via a fastener, the second connecting portion 452 can be fastened to the second end 422 via a fastener, and the third connecting portion 453 can be disposed on one side of the second housing 420 in the second direction D and connect the first main relay 441a to the second main relay 441b.

[0182] The first housing 410 has a first opening 411. The first housing 410 can be mounted on the first end 421 via a snap-fit ​​connection or a fastener-locked connection. The first connecting portion 451 can be exposed through the first opening 411 to electrically connect the first connecting portion 451 to an external structure. Furthermore, a protective member 412, such as a protective cover, can be provided on the first opening 411. The protective cover can be hingedly mounted at the end of the first opening 411 to cover and protect the first connecting member.

[0183] The third housing 430 is provided with a third opening 431. The third housing 430 can be covered on the second end 422 by means of a snap connection or a fastener lock connection, and the second connection portion 452 can be exposed from the third opening 431. At the same time, a mounting groove 433 can be provided on the side of the third housing 430 facing away from the second housing 420, and a heat conducting member 432 can be placed in the mounting groove 433. The heat conducting member 432 is in contact with the exposed third connection portion 453 to achieve the purpose of improving the heat dissipation effect of the third connection portion 453.

[0184] Referring to Figure 2, an embodiment of the present application further provides a battery device 100, including a box, a battery cell assembly 110 and the power distribution device 400 as described above. The battery cell assembly 110 and the power distribution device 400 are accommodated in the box, and the power distribution device 400 is electrically connected to the battery cell assembly 110.

[0185] The battery device 100 provided in the embodiment of the present application includes the above-mentioned power distribution device 400 . Based on the excellent reliability of the above-mentioned power distribution device 400 , the reliability of the battery device 100 is also better.

[0186] 2 , 3 and 7 , in some embodiments, the battery device 100 further includes a heat exchange plate 30 , which is attached to the battery cell assembly 110 ; the power distribution device 400 includes a heat conductor 432 , which is attached to the heat exchange plate 30 .

[0187] The heat exchange plate 30 is a plate structure within the battery device 100 that forms a heat exchange channel. A cooling medium circulates through the channel to exchange heat with the battery cell assembly 110 within the battery device 100. The heat exchange plate 30 is used to exchange heat with the battery cell assembly 110 and dissipate heat.

[0188] In this embodiment, the heat conductive member 432 of the power distribution device 400 can be attached to the heat exchange plate 30, that is, the heat conductive member 432 and the battery cell assembly 110 share the heat exchange plate 30; in this way, the second connection portion 452 exposed at the third opening portion 431 of the third shell 430 is in contact with the heat conductive member 432, and the heat on the second connection portion 452 can be transferred to the heat exchange plate 30 through the heat conductive member 432, so as to achieve efficient heat dissipation of the second connection portion 452.

[0189] With this configuration, the power distribution device 400 can share the heat exchange plate 30 through the heat conducting member 432 , thereby improving the heat dissipation effect of the power distribution device 400 .

[0190] 1 and 2 , an embodiment of the present application further provides an electrical device, including the battery device 100 as described above, and the battery device 100 is used to provide electrical energy.

[0191] The electric device provided in the embodiment of the present application is, for example, the aforementioned vehicle 1000 . The electric device includes the aforementioned battery device 100 . Thus, the reliability of the electric device is also improved.

[0192] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A power distribution device, characterized in that: The device comprises a first housing, a second housing, a third housing, an electrical component and an electrical connector. In a first direction, the first housing, the second housing and the third housing are stacked in sequence, the electrical component is arranged on the second housing, and the electrical connector is electrically connected to the electrical component. The electrical connector includes a first connecting portion and a second connecting portion; the second housing has a first end facing the first housing and a second end facing the third housing, the first connecting portion is connected to the first end, and the second connecting portion is connected to the second end; Among them, a first opening portion is opened on the first shell, the first shell covers the first end, and at least part of the first connecting portion is exposed at the first opening portion; a third opening portion is opened on the third shell, the third shell covers the second end, and at least part of the second connecting portion is exposed at the third opening portion.

2. The power distribution device according to claim 1, characterized in that: The first housing is provided with a protective member, the protective member covers the first opening, and the protective member is configured to open the first opening.

3. The power distribution device according to claim 1 or 2, characterized in that: The first connecting portion includes a first connecting end and a second connecting end. The first connecting end is used to connect to a battery cell assembly, and the second connecting end is used to connect to an electrical device or a charging device.

4. The power distribution device according to any one of claims 1 to 3, characterized in that: The power distribution device further includes a heat conductor. In the first direction, the heat conductor is disposed on a side of the third shell facing away from the second shell. The second connection portion is exposed at the third opening and contacts the heat conductor.

5. The power distribution device according to claim 4, characterized in that: A mounting groove is provided on a side surface of the third shell facing away from the second shell, and the heat conducting member is accommodated in the mounting groove; the third opening is provided on the bottom wall of the mounting groove.

6. The power distribution device according to any one of claims 1 to 5, characterized in that: The electrical device includes a main relay, the main relay includes a relay body and a high-voltage contact, the relay body is arranged on the second housing, and the high-voltage contact is arranged along a second direction and toward the outside of the second housing, wherein the second direction is perpendicular to the first direction; The electrical connector further includes a third connecting portion. In the second direction, the third connecting portion is located on a side of the second housing close to the high-voltage contact and is connected to the high-voltage contact.

7. The power distribution device according to claim 6, characterized in that: The third shell is provided with a covering portion. In the second direction, the covering portion is located on a side of the second shell close to the third connecting portion, and the covering portion covers the third connecting portion.

8. The power distribution device according to any one of claims 1 to 5, characterized in that: The electrical device includes a main relay, which includes a relay body and a high-voltage contact. The relay body is arranged on the second shell, and the high-voltage contact is arranged along the first direction and toward the third shell; the high-voltage contact is connected to the second connecting part.

9. The power distribution device according to any one of claims 1 to 8, characterized in that: The third shell includes a bottom shell portion and a first flange portion arranged at the outer edge of the bottom shell portion, and the bottom shell portion and the first flange portion are jointly covered at the second end along the first direction; the bottom shell portion is connected to the second shell, and / or the first flange portion is connected to the second shell; the bottom shell portion is provided with the third opening portion.

10. The power distribution device according to any one of claims 1 to 9, characterized in that: There are multiple third openings. In the first direction, a partition is provided on a side wall of the third shell facing away from the second shell, and the partition is provided between two adjacent third openings to separate the two adjacent third openings.

11. The power distribution device according to any one of claims 1 to 10, characterized in that: The first shell includes a top cover portion and a second flange portion arranged at the outer edge of the top cover portion, and the top cover portion and the second flange portion are jointly arranged at the first end along the first direction cover; the top cover portion is connected to the second shell, and / or the second flange portion is connected to the second shell; the top cover portion is provided with the first opening portion.

12. The power distribution device according to claim 11, characterized in that: A plurality of first conductive members arranged at intervals are embedded in the first shell, and a first extension portion is formed between adjacent first conductive members. A first through hole is also provided on the first shell, and the first through hole is located between two opposite first extension portions of two adjacent first conductive members.

13. The power distribution device according to claim 11 or 12, characterized in that: A plurality of second conductive members arranged at intervals are embedded in the first shell, and a second extension portion is formed between adjacent second conductive members; The first shell portion is further provided with a second through hole, which is located between two opposite second extensions of two adjacent second conductor members; the power distribution device also includes a barrier portion, which is inserted into the first through hole and separates the two second extensions.

14. The power distribution device according to any one of claims 1 to 13, characterized in that: At least one accommodating cavity is formed on the second shell, and the electrical component is accommodated in the accommodating cavity.

15. A battery device, characterized in that: It comprises a box, a battery cell assembly and the power distribution device according to any one of claims 1 to 14, the battery cell assembly and the power distribution device are accommodated in the box, and the power distribution device is electrically connected to the battery cell assembly.

16. The battery device according to claim 15, wherein: The battery device further includes a heat exchange plate, which is attached to the battery cell assembly; the power distribution device includes a heat conductor, which is attached to the heat exchange plate.

17. An electrical device, characterized in that: The battery device according to claim 15 or 16 is used to provide electrical energy.

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