Power distribution device, battery device and power utilization device

Abstract

The utility model belongs to the technical field of power distribution, and particularly relates to a power distribution device, a battery device and a power utilization device. The device main body comprises a base body, and a first electric connecting piece, a second electric connecting piece, a third electric connecting piece, a fourth electric connecting piece, a first on-off device and a second on-off device which are arranged on the base body; the matching module comprises at least one of a first on-off module and a second on-off module; the first on-off module, the second on-off module and the device body are of a split structure, the first on-off module is used for controlling on-off of a circuit between the first charging interface and the device body, and the second on-off module is used for controlling on-off of a circuit between the first discharging interface and the device body. Therefore, the first on-off module and the second on-off module can be selected according to actual requirements, the requirements of different platforms and different electrical architectures can be met, and the compatibility of the power distribution device is improved.

Description

Technical Field

[0001] This application belongs to the field of power distribution technology, and in particular relates to a power distribution device, a battery device, and a power consumption device. Background Technology

[0002] In the battery system of new energy vehicles, the power distribution device can distribute the high-voltage electrical energy output by the battery to power high-voltage components such as drive motors and air conditioning compressors. It also integrates components such as fuses and contactors, which can cut off the circuit in case of circuit overload, short circuit or other abnormalities, thereby improving the stability of system operation. It can also monitor the status of high-voltage circuits and provide feedback signals to help the whole vehicle to be efficiently controlled.

[0003] However, with the development of the new energy vehicle industry and the diversification of market demand, there are significant differences in the electric platforms and high-voltage architectures of different car manufacturers and models. Power distribution devices adapted to different platforms and electrical architectures need to be customized according to the vehicle model, resulting in a wide variety of power distribution devices with diverse styles. Furthermore, this customized design directly leads to poor compatibility, making it difficult for power distribution devices to be reused across electrical architectures and platforms.

[0004] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0005] The purpose of this application is to provide a power distribution device, a battery device, and a power consumption device, including but not limited to those compatible with different platforms and electrical architectures.

[0006] The technical solution adopted in the embodiments of this application is:

[0007] In a first aspect, a power distribution device is provided for a battery device. The power distribution device includes a main body and optional modules. The main body includes a base and a first electrical connector, a second electrical connector, a third electrical connector, a fourth electrical connector, a first switching device, and a second switching device disposed on the base. The first switching device is electrically connected between the first and second electrical connectors, and the first electrical connector is used for electrical connection with the positive electrode of a battery cell assembly in the battery device. The second switching device is electrically connected between the third and fourth electrical connectors, and the third electrical connector is used for electrical connection with the battery cell assembly in the battery device. The negative terminal of the component is electrically connected; the optional module includes at least one of a first switching module and a second switching module; the first switching module and the main body of the device are separate structures, and the first switching module is used to electrically connect between the first charging interface of the battery device and the second and fourth electrical connectors to control the circuit connection and disconnection between the first charging interface and the main body of the device; the second switching module and the main body of the device are separate structures, and the second switching module is used to electrically connect between the first discharging interface of the battery device and the second and fourth electrical connectors to control the circuit connection and disconnection between the first discharging interface and the main body of the device.

[0008] By adopting the technical solution of this embodiment, the positive and negative terminals of the battery cell assembly within the battery device are electrically connected to the first and third electrical connectors, respectively, while the second and fourth electrical connectors are electrically connected to the first charging interface and the first discharging interface of the battery device, thereby realizing the charging and discharging of the battery device. The first and second switching modules can respectively control the on / off control of the circuit between the device body and the first charging interface and the first discharging interface. Since the optional module also includes at least one of the first and second switching modules, and both the first and second switching modules are separate from the device body, the first and second switching modules can be separated from the device body. This allows for the selection of the first and second switching modules according to actual needs, enabling different electrical architectures to be implemented, thus meeting the requirements of different platforms and electrical architectures and increasing the compatibility of the power distribution device. The modular structure of the first and second switching modules also facilitates the standardized design of the power distribution device.

[0009] In some embodiments, the first switching module includes a first housing, a first switch, and a second switch. The first switch and the second switch are located inside the first housing. The first switch is connected in series between the second electrical connector and the positive terminal of the first charging interface, and the second switch is connected in series between the fourth electrical connector and the negative terminal of the first charging interface.

[0010] By adopting the technical solution of this embodiment, the first housing provides protection for the first switch and the second switch. The first housing can also connect the first switch and the second switch into a modular component, thereby facilitating the formation of standardized components and making it easier to select the first switching module. In addition, the first switch can disconnect the circuit between the second electrical connector and the positive terminal of the first charging interface, and the second switch can disconnect the circuit between the fourth electrical connector and the negative terminal of the first charging interface, thereby disconnecting two circuits, which helps to improve the reliability of power disconnection and reduce the residual fault caused by incomplete disconnection of a single circuit.

[0011] In some embodiments, the second switching module includes a second housing and a third switch and a fourth switch disposed within the second housing. The third switch and the fourth switch are located within the second housing. The third switch is connected in series between the positive terminal of the second electrical connector and the first discharge interface, and the fourth switch is connected in series between the fourth electrical connector and the negative terminal of the first discharge interface.

[0012] By adopting the technical solution of this embodiment, the second housing provides protection for the third and fourth switches. The second housing can also connect the third and fourth switches into a modular component, thereby facilitating the formation of standardized components and making it easier to select the second switching module. In addition, the third switch can disconnect the circuit between the second electrical connector and the positive terminal of the first discharge interface, and the fourth switch can disconnect the circuit between the fourth electrical connector and the negative terminal of the first discharge interface, thereby disconnecting two circuits, which helps to improve the reliability of power disconnection and reduce the residual faults caused by incomplete disconnection of a single circuit.

[0013] In some embodiments, the optional module further includes a first fuse protection module, which is a separate structure from the main body of the device. The first fuse protection module is used to electrically connect the second charging interface of the battery device to the second electrical connector and the fourth electrical connector. The first charging interface is a DC charging interface and the second charging interface is an AC charging interface.

[0014] By adopting the technical solution of this embodiment, a first fuse protection module can be optionally equipped to meet the needs of different electrical platforms and electrical architectures. When the second charging interface is connected to the charging circuit, the first fuse protection module plays the role of overcurrent protection, improving the reliability of the battery device. The configuration of the first and second charging interfaces also allows for flexible selection of charging methods to meet different needs.

[0015] In some embodiments, the first fuse protection module includes a third housing and a first fuse and a first current detection element disposed within the third housing. The first fuse is connected in series between the positive terminal of the second electrical connector and the second charging interface, and the first current detection element is connected in series between the negative terminal of the fourth electrical connector and the second charging interface.

[0016] By adopting the technical solution of this embodiment, the third housing provides protection for the first fuse and the first current detection device. The third housing can also connect the first fuse and the first current detection device into a modular component, which facilitates the formation of standardized components and the selection of the first fuse protection module. The first fuse can disconnect the circuit in time when an overload occurs, which helps to improve the reliability of the power distribution device. In addition, the first current detection device can detect the current in the circuit, so as to monitor the charging status of the second charging interface in real time.

[0017] In some embodiments, the optional module further includes a second fuse protection module, which is a separate structure from the main body of the device. The second fuse protection module is used to electrically connect between the second discharge interface of the battery device and the second electrical connector and the fourth electrical connector; the first discharge interface is used to electrically connect to the drive components of the vehicle's wheels, and the second discharge interface is used to electrically connect to the on-board converter.

[0018] By adopting the technical solution of this embodiment, a second fuse protection module can be optionally added to meet the needs of different electrical platforms and electrical architectures. When the second discharge interface is connected to the vehicle converter, the second fuse protection module plays the role of overcurrent protection, improving the reliability of the battery device. The setting of the first discharge interface and the second discharge interface can distribute electrical energy to different components to meet different needs.

[0019] In some embodiments, the second fuse protection module includes a fourth housing and a second fuse and a second current detection element disposed within the fourth housing. The second fuse is connected in series between the positive terminal of the second electrical connector and the second discharge interface, and the second current detection element is connected in series between the negative terminal of the fourth electrical connector and the second discharge interface.

[0020] By adopting the technical solution of this embodiment, the fourth housing provides protection for the second fuse and the second current detection element. The fourth housing can also connect the second fuse and the second current detection element into a modular component, which facilitates the formation of standardized components and the selection of the second fuse protection module. The second fuse can disconnect the circuit in time when an overload occurs, which helps to improve the reliability of the power distribution device. In addition, the second current detection element can detect the current in the circuit, so as to monitor the discharge status of the second discharge interface in real time.

[0021] In some embodiments, the battery cell assembly includes a first battery cell assembly and a second battery cell assembly; the power distribution device further includes a conversion mechanism, which is a separate structure from the main body of the device. The first battery cell assembly and the second battery cell assembly are electrically connected to a first electrical connector and a third electrical connector through the conversion mechanism. The conversion mechanism can convert the first battery cell assembly and the second battery cell assembly in series and parallel.

[0022] By adopting the technical solution of this embodiment, a conversion mechanism can be optionally added to meet the charging and discharging requirements of different voltages.

[0023] In some embodiments, the switching mechanism includes a fifth switch, a first switch module, and a second switch module. The positive terminal of the first battery cell assembly is electrically connected to a first electrical connector, and the negative terminal of the second battery cell assembly is electrically connected to a third electrical connector. The fifth switch is connected in series between the negative terminal of the first battery cell assembly and the positive terminal of the second battery cell assembly. One end of the first switch module is electrically connected between the fifth switch and the negative terminal of the first battery cell assembly, and the other end of the first switch module is electrically connected to a fourth electrical connector. One end of the second switch module is electrically connected between the fifth switch and the positive terminal of the second battery cell assembly, and the other end of the second switch module is electrically connected to the first electrical connector.

[0024] By adopting the technical solution of this embodiment, the series-parallel switching of the first battery cell assembly and the second battery cell assembly can be realized, as well as the independent charging and discharging of the first battery cell assembly and the second battery cell assembly, to meet the needs of more application scenarios.

[0025] In some embodiments, the first switch module and the second switch module are separate structures.

[0026] By adopting the technical solution of this embodiment, the first switch module and the second switch module are separate structures, so that the first switch module and the second switch module can be flexibly installed in different positions. In addition, the first switch module and the second switch module are independent modules, which also facilitates the formation of standardized components and facilitates the standardized design of power distribution devices.

[0027] In some embodiments, the first switch module includes a fifth housing and a sixth switch and a third fuse disposed within the fifth housing, the sixth switch and the third fuse being connected in series between the negative terminal of the first battery cell assembly and the third electrical connector; the second switch module includes a sixth housing and a seventh switch and a fourth fuse disposed within the sixth housing, the seventh switch and the fourth fuse being connected in series between the positive terminal of the second battery cell assembly and the first electrical connector.

[0028] By adopting the technical solution of this embodiment, the fifth housing provides protection for the third fuse and the sixth switch. The fifth housing can also connect the third fuse and the sixth switch into a modular component. The sixth housing provides protection for the fourth fuse and the seventh switch. The sixth housing can also connect the fourth fuse and the seventh switch into a modular component, which facilitates the formation of standardized components for the first switch module and the second switch module. The third fuse and the fourth fuse can disconnect the circuit in time when the circuit is overloaded, which helps to improve the reliability of the power distribution device. In addition, the sixth switch and the sixth switch, together with the fifth switch, can realize the series-parallel conversion of the first battery cell assembly and the second battery cell assembly.

[0029] In some embodiments, the power distribution unit further includes a filter electrically connected between the optional module and the first and fourth electrical connections.

[0030] By adopting the technical solution of this embodiment, the filter can attenuate or bypass the interference signal to ground, cut off its propagation path, and improve the stability of the circuit system operation.

[0031] In some embodiments, the substrate includes a seventh housing and an eighth housing that are separately disposed, a first electrical connector, a second electrical connector and a first switching device are disposed in the seventh housing, and a third electrical connector, a fourth electrical connector and a second switching device are disposed in the eighth housing.

[0032] By adopting the technical solution of this embodiment, the setting of the seventh and eighth shells allows the main body of the device to be divided into two independent parts, which can be flexibly installed in different positions, thus improving the space utilization rate inside the battery device.

[0033] In some embodiments, the first switching device includes a fifth fuse and a main positive relay disposed within a seventh housing, the fifth fuse and the main positive relay being connected in series between the first electrical connector and the second electrical connector.

[0034] By adopting the technical solution of this embodiment, the power transmission of the battery cell assembly can be controlled by switching the main positive relay on and off. At the same time, the fifth fuse can disconnect the circuit in the event of an overload, which helps to improve the operational reliability of the circuit system.

[0035] In some embodiments, the seventh housing is provided with a first voltage sampling interface and a first control interface. The first control interface is electrically connected to the main positive relay to control the on / off state of the main positive relay. The first voltage sampling interface is used to output the potential information between the first electrical connector, the second electrical connector, the fifth fuse, and the main positive relay.

[0036] By adopting the technical solution of this embodiment, the first voltage sampling interface and the first control interface are set in the seventh housing. In this way, different types of fifth fuses and main positive relays can be installed in the seventh housing, thereby changing the functional characteristics of the power distribution device to meet different needs. However, the first voltage sampling interface and the first control interface can be reused without repeated configuration.

[0037] In some embodiments, the second switching device includes a sixth fuse and a main negative relay disposed in an eighth housing, the sixth fuse and the main negative relay being connected in series between a third electrical connector and a fourth electrical connector.

[0038] By adopting the technical solution of this embodiment, the power transmission of the battery cell assembly can be controlled by switching the main and negative relays on and off. At the same time, the sixth fuse can disconnect the circuit in the event of an overload, which helps to improve the operational reliability of the circuit system.

[0039] In some embodiments, the eighth housing is provided with a second voltage sampling interface and a second control interface. The second control interface is electrically connected to the main negative relay to control the on / off state of the main negative relay. The second voltage sampling interface is used to output the potential information of the third electrical connector and the second electrical connector.

[0040] By adopting the technical solution of this embodiment, the second voltage sampling interface and the second control interface are set in the eighth housing. In this way, different types of sixth fuses and main negative relays can be installed in the eighth housing, thereby changing the functional characteristics of the power distribution device to meet different needs. However, the second voltage sampling interface and the second control interface can be reused without repeated configuration.

[0041] Secondly, a battery device is provided, including the aforementioned power distribution device.

[0042] By adopting the technical solution of this embodiment, the power distribution device has good compatibility, which helps to reduce the manufacturing cost of the battery device.

[0043] Thirdly, an electrical device is provided, including the battery device described above.

[0044] By adopting the technical solution of this embodiment, the manufacturing cost of the battery device is low, which helps to reduce the manufacturing cost of the power-consuming device.

[0045] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0048] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application.

[0049] Figure 3 This is a schematic diagram of the structure of a battery device provided in some other embodiments of this application.

[0050] Figure 4 The circuit diagrams of the battery devices provided in some embodiments of this application are shown.

[0051] Figure 5 This is a schematic diagram of the structure of a positive electrode module (negative electrode module) provided in some embodiments of this application.

[0052] Figure 6 for Figure 5The diagram shown is an exploded view of the positive electrode module (negative electrode module).

[0053] The following are the labeling elements in the figure:

[0054] 1000, Vehicle; 1100, Battery Unit; 1200, Controller; 1300, Motor; 100, Battery Cell Assembly; 110, Battery Cell; M2, First Battery Cell Assembly; M1, Second Battery Cell Assembly; 111, First Charging Interface; 112, First Discharging Interface; 113, Second Charging Interface; 114, Second Discharging Interface; 200, Housing; 210, First Housing; 220, Second Housing; 300, Power Distribution Device; 310, Device Body; 3101, Base; 311, Positive Electrode Module; 3111, First Electrical Connector; 3112, Second Electrical Connector 3113, First switching device; B11, Fifth fuse; K11, Main positive relay; 3114, Seventh housing; 31141, First housing body; 31142, First cover; 31143, Second cover; 3115, First voltage sampling interface; 3116, First control interface; 3117, First conductive element; 312, Negative module; 3121, Third electrical connector; 3122, Fourth electrical connector; 3123, Second switching device; B21, Sixth fuse; K21, Main negative relay; 3124, Eighth housing; 3125, Second voltage sampling interface; 312 6. Second control interface; 3127. Second conductive element; 320. Optional module; 321. First switching module; K31. First switch; K32. Second switch; 3211. First housing; 322. Second switching module; K41. Third switch; K42. Fourth switch; 3221. Second housing; 323. First fuse protection module; B4. First fuse; CS2. First current detection element; 3231. Third housing; 324. Second fuse protection module; B3. Second fuse; CS1. Second current detection element; 3241. Fourth housing; 330. Conversion mechanism; K2 331, First switch module; K3, Sixth switch; B2, Third fuse; 3311, Fifth housing; 332, Second switch module; K1, Seventh switch; B1, Fourth fuse; 3321, Sixth housing; 340, Filter; CS3, Third current detection element; U1, First sampling point; U2, Second sampling point; U3, Third sampling point; U4, Sixth sampling point; U5, Seventh sampling point; U7, Eighth sampling point; U6, Ninth sampling point; U00, Fourth sampling point; U01, Fifth sampling point; U02, Tenth sampling point; U03, Eleventh sampling point. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the description of the embodiments of this application, 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 indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0057] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0061] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0062] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0063] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0064] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0065] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] In the battery system of new energy vehicles, the power distribution device can distribute the high-voltage electrical energy output by the battery to power high-voltage components such as drive motors and air conditioning compressors. It also integrates components such as fuses and contactors, which can cut off the circuit in case of circuit overload, short circuit or other abnormalities, thereby improving the stability of system operation. It can also monitor the status of high-voltage circuits and provide feedback signals to help the whole vehicle to be efficiently controlled.

[0067] However, with the development of the new energy vehicle industry and the diversification of market demand, the electric platforms and high-voltage architectures of different car manufacturers and models vary significantly. Because the topologies of high-voltage circuits differ under different electric platforms and architectures, it is difficult to adopt standardized design schemes for power distribution devices. Targeted customized designs are necessary, resulting in a wide variety of power distribution devices with diverse styles. Furthermore, customized designs directly lead to poor compatibility, making it difficult for power distribution devices to be reused across electrical architectures and platforms.

[0068] Based on this, this application provides a power distribution device for a battery device. The power distribution device includes a main body and optional modules. The main body includes a base and a first electrical connector, a second electrical connector, a third electrical connector, a fourth electrical connector, a first switching device, and a second switching device disposed on the base. The first switching device is electrically connected between the first and second electrical connectors, and the first electrical connector is used for electrical connection with the positive electrode of a battery cell assembly in the battery device. The second switching device is electrically connected between the third and fourth electrical connectors, and the third electrical connector is used for electrical connection with the battery cell assembly in the battery device. The negative electrode of the battery cell assembly is electrically connected; the optional module includes at least one of a first switching module and a second switching module; the first switching module and the device body are separate structures, and the first switching module is used to electrically connect between the first charging interface of the battery device and the second and fourth electrical connectors to control the circuit connection and disconnection between the first charging interface and the device body; the second switching module and the device body are separate structures, and the second switching module is used to electrically connect between the first discharging interface of the battery device and the second and fourth electrical connectors to control the circuit connection and disconnection between the first discharging interface and the device body.

[0069] In the power distribution device of this application embodiment, the positive and negative terminals of the battery cells within the battery device are electrically connected to the first and third electrical connectors, respectively. The second and fourth electrical connectors are electrically connected to the first charging interface and the first discharging interface of the battery device, thereby realizing the charging and discharging of the battery device. The first and second switching modules can respectively control the on / off control of the circuit between the device body and the first charging interface and the first discharging interface. Since the optional module also includes at least one of the first and second switching modules, and both the first and second switching modules are separate from the device body, the first and second switching modules can be separated from the device body. This allows for the selection of the first and second switching modules according to actual needs, thereby enabling different electrical architectures and meeting the requirements of different platforms and electrical architectures, increasing the compatibility of the power distribution device. The modular structure of the first and second switching modules also facilitates the standardized design of the power distribution device.

[0070] The technical solutions described in the embodiments of this application are applicable to power distribution devices, battery devices using power distribution devices, and power consumption devices using battery devices.

[0071] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using the battery device disclosed in this application.

[0072] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0073] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0074] Please refer to Figure 1 Vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is installed inside vehicle 1000, which can be located at the bottom, front, or rear of vehicle 1000. Battery device 1100 can be used to power vehicle 1000; for example, it can serve as the operating power source for vehicle 1000's electrical system, such as meeting the power requirements for starting, navigation, and operation of vehicle 1000.

[0075] The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0076] See Figure 2 As shown, in some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0077] The battery device 1100 mentioned in the embodiments of this application may include one or more battery cell assemblies 100 for providing voltage and capacity. The battery cell assembly 100 may include multiple battery cells 110, which are connected in series, parallel or mixed connection via a busbar.

[0078] In some embodiments, the battery cell assembly 100 is typically formed by arranging a plurality of battery cells 110.

[0079] As an example, the battery cell assembly 100 can be a battery module, which is formed by arranging and fixing multiple battery cells 110 together. As an example, the battery module can be formed by bundling multiple battery cells 110 together with cable ties.

[0080] In some embodiments, the battery device 1100 may be a battery pack, which includes a housing 200 and one or more battery cell assemblies 100, the battery cell assemblies 100 being housed in the housing 200.

[0081] As an example, the battery cell assembly 100 can be a battery module, and the battery cell assembly 100 can be housed in the housing 200 by fixing the battery module in the housing 200.

[0082] As an example, the battery cell assembly 100 can also be housed in the housing 200 by directly fixing multiple battery cells 110 to the housing 200.

[0083] As an example, the housing 200 may include a first housing 210 and a second housing 220. The first housing 210 and the second housing 220 are fastened together to form a closed space inside the housing 200 to house the battery cell assembly 100. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 210 may be a top cover or a bottom plate.

[0084] As an example, the housing 200 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 the interior of the housing 200 forms an enclosed space to house the battery cell assembly 100.

[0085] In some embodiments, the housing 200 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 200 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 200 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0086] In this embodiment of the application, the battery cell 110 can be a secondary battery. A secondary battery refers to a battery cell 110 that can be used again after being discharged by recharging to activate the active materials.

[0087] The battery cell 110 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0088] See Figure 3 and Figure 4As shown, this application embodiment provides a power distribution device 300, which is electrically connected to a battery cell assembly 100. The battery device 1100 is connected to the power consumption system of the power-consuming device through the power distribution device 300, and the power distribution device 300 performs high-voltage distribution to the battery device 1100.

[0089] In some examples, the power distribution device 300 may be referred to as a high-voltage box, a high-voltage distribution box, or a power distribution unit, etc.

[0090] In some embodiments, the power distribution device 300 is used for the battery device 1100. The power distribution device 300 includes a device body 310 and an optional module 320. The device body 310 includes a base 3101 and a first electrical connector 3111, a second electrical connector 3112, a third electrical connector 3121, a fourth electrical connector 3122, a first switching device 3113, and a second switching device 3123 disposed on the base 3101. The first switching device 3113 is electrically connected between the first electrical connector 3111 and the second electrical connector 3112. The first electrical connector 3111 is used for electrical connection with the positive electrode of the battery cell assembly 100 of the battery device 1100. The second switching device 3123 is electrically connected between the third electrical connector 3121 and the fourth electrical connector 3122. The third electrical connector 3121 is used for connection with the battery device 1100. The negative terminal of the battery cell assembly 100 is electrically connected; the optional module 320 includes at least one of a first switching module 321 and a second switching module 322; the first switching module 321 is a separate structure from the device body 310, and the first switching module 321 is used to electrically connect between the first charging interface 111 of the battery device 1100 and the second electrical connector 3112 and the fourth electrical connector 3122 to control the circuit connection and disconnection between the first charging interface 111 and the device body 310; the second switching module 322 is a separate structure from the device body 310, and the second switching module 322 is used to electrically connect between the first discharging interface 112 of the battery device 1100 and the second electrical connector 3112 and the fourth electrical connector 3122 to control the circuit connection and disconnection between the first discharging interface 112 and the device body 310.

[0091] The main body 310 can be a collection of electrical components and electrical connectors that make up the basic circuit of the power distribution device 300. The main body 310 can control the circuit connection and disconnection between the battery cell assembly 100 and the first charging interface 111 and the first discharging interface 112. The electrical connectors can be components such as copper busbars and wires.

[0092] The main body 310 of the device includes a base 3101, a first electrical connector 3111, a second electrical connector 3112, a third electrical connector 3121, a fourth electrical connector 3122, a first switching device 3113, and a second switching device 3123. The base 3101 is used to provide a mounting base for the first electrical connector 3111, the second electrical connector 3112, the third electrical connector 3121, the fourth electrical connector 3122, the first switching device 3113, and the second switching device 3123. The base 3101 can be made of flame-retardant and insulating plastic or alloy materials.

[0093] The first electrical connector 3111 and the third electrical connector 3121 are the power transmission interfaces between the power distribution device 300 and the battery cell assembly 100. The first electrical connector 3111 is connected to the positive terminal of the battery cell assembly 100, and the third electrical connector 3121 is connected to the negative terminal of the battery cell assembly 100. The first electrical connector 3111 and the third electrical connector 3121 can adopt the structural form of copper busbar, connector, etc.

[0094] The second electrical connector 3112 and the fourth electrical connector 3122 are interfaces that electrically connect the main body 310 to the discharge or charging interface of the battery device 1100. The second electrical connector 3112 is electrically connected to the positive terminal of the discharge and charging interfaces, and the fourth electrical connector 3122 is electrically connected to the negative terminal of the discharge and charging interfaces, thereby realizing the charging and discharging of the battery cell assembly 100. The second electrical connector 3112 and the fourth electrical connector 3122 can adopt copper busbars, connectors, or other structural forms.

[0095] The first switching device 3113 is connected in series between the first electrical connector 3111 and the second electrical connector 3112. By switching the first switching device 3113 on and off, the positive circuit connected to the positive terminal of the battery cell assembly 100 is controlled. The second switching device 3123 is connected in series between the third electrical connector 3121 and the fourth electrical connector 3122. By switching the second switching device 3123 on and off, the negative circuit connected to the negative terminal of the battery cell assembly 100 is controlled. In this way, the circuit can be cut off by the first switching device 3113 and the second switching device 3123 under fault conditions, thereby improving the reliability of the circuit.

[0096] In some examples, the first switching device 3113 and the second switching device 3123 may include relays to control the switching on and off of the circuit.

[0097] A relay is an automatic electrical control device that uses a weak electrical signal to control the opening and closing of a strong electrical circuit. Relays achieve precise control of high-current, high-voltage controlled circuits through small current and low voltage control signals.

[0098] A relay consists of an electromagnetic component and a contact component. The electromagnetic component is the control and drive part of the relay.

[0099] In some examples, the electromagnetic component includes a coil, a moving iron core, and a spring. The coil is connected to a low-voltage, low-current control circuit. When the control circuit is energized, the coil generates an electromagnetic attraction, and the moving iron core moves against the spring force under the action of the electromagnetic attraction. When the control circuit is de-energized, the magnetic field dissipates, and the spring force drives the moving iron core back to its initial position, thereby providing power for the opening and closing action of the contact assembly.

[0100] The contact assembly is the component of a relay that performs the switching on and off actions.

[0101] In some examples, the contact assembly includes a moving contact, a spindle, and contact terminals. The contact terminals serve as the connection interface for the controlled circuit; there are two contact terminals, which are used to connect to the high-current, high-voltage controlled circuit to form a circuit loop. One end of the spindle is connected to the moving contact, and the other end is connected to the moving iron core.

[0102] When the control circuit is energized, the coil generates an electromagnetic attraction, and the moving iron core moves against the elastic force of the release spring under the attraction. At the same time, the spindle drives the moving contact piece to move towards the contact terminal, so that the moving contact piece contacts the two contact terminals. At this time, the contact assembly is in a connected state, and the controlled circuit is connected.

[0103] When the control circuit is de-energized, the spring force drives the moving iron core back to its initial position. At the same time, the spindle drives the moving contact piece to move in the opposite direction, causing the moving contact piece to separate from the two contact terminals. At this time, the contact assembly is in the open state, and the controlled circuit is also in the open state.

[0104] In some examples, the first switching device 3113 and the second switching device 3123 may also include components such as fuses and current sensors.

[0105] The optional module 320 is a module that is installed according to actual needs; the optional module 320 includes at least one of the first switching module 321 and the second switching module 322. It can be understood that the power distribution device 300 is equipped with only the first switching module 321, or only the second switching module 322, or both the first switching module 321 and the second switching module 322.

[0106] The first on / off module 321 can refer to a module formed by integrating electrical components for controlling the on / off of the circuit between the first charging interface 111 and the second electrical connector 3112 and the fourth electrical connector 3122. The electrical components can be relays, etc.

[0107] The first switching module 321 and the device body 310 are separate structures, which means that the electrical components in the first switching module 321 and the device body 310 have independent mounting bases and are not integrated in the same housing.

[0108] For example, the electrical components of the device body 310 and the electrical components of the first switching module 321 are integrated in different housings.

[0109] The first switching module 321 is separable from the device body 310. The first switching module 321 and the device body 310 are independent components. They may not be connected, or they may be connected by detachable means such as bolts or snap-fits. Furthermore, the separability of the first switching module 321 from the device body 310 allows the first switching module 321 to be independent of the device body 310, thus enabling optional installation of the first switching module 321.

[0110] The second on / off module 322 can refer to a module formed by integrating electrical components for controlling the circuit connection and disconnection between the first discharge interface 112 and the second electrical connector 3112 and the fourth electrical connector 3122.

[0111] The second switching module 322 and the device body 310 are separate structures, which means that the electrical components in the second switching module 322 and the device body 310 have independent mounting bases and are not integrated in the same housing.

[0112] For example, the electrical components of the device body 310 and the electrical components of the second switching module 322 are integrated in different housings.

[0113] The second switching module 322 is separable from the device body 310. The second switching module 322 and the device body 310 are independent components. They may not be connected, or they may be connected by detachable means such as bolts or snap-fits. Furthermore, the separability of the second switching module 322 from the device body 310 allows the second switching module 322 to be independent of the device body 310, thus enabling optional installation of the second switching module 322.

[0114] The first switching module 321 and the second switching module 322 are separate structures. This means that the electrical components in the first switching module 321 and the second switching module 322 have independent mounting bases and are not integrated into the same housing.

[0115] For example, the electrical components of the second switching module 322 and the electrical components of the first switching module 321 are integrated in different housings.

[0116] The first switching module 321 and the second switching module 322 are separable, and the first switching module 321 and the second switching module 322 are independent components; this arrangement allows them to be independent of each other, thereby facilitating the flexible selection and matching of the first switching module 321 and the second switching module 322.

[0117] The second electrical connector 3112 and the fourth electrical connector 3122 are electrically connected to the first charging interface 111 of the battery device 1100 through the first switching module 321. In this way, the first switching module 321 can control whether the second electrical connector 3112 and the fourth electrical connector 3122 are electrically connected to the first charging interface 111. If the first charging interface 111 needs to be charged, the first switching module 321 can connect the second electrical connector 3112 and the fourth electrical connector 3122 to the first charging interface 111, thereby realizing the charging of the battery cell assembly 100. If charging is not needed or the charging is abnormal, the first switching module 321 can disconnect the circuit between the second electrical connector 3112 and the fourth electrical connector 3122 and the first charging interface 111 to protect the electrical components in the charging circuit.

[0118] The first switching module 321 can be directly electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122. The first switching module 321 can also be electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122 through components such as copper busbars and wires. The first switching module 321 can be directly electrically connected to the first charging interface 111. The first switching module 321 can also be electrically connected to the first charging interface 111 through components such as copper busbars and wires.

[0119] For example, the first on / off module 321 may include a relay to control the on / off state of the circuit.

[0120] The second electrical connector 3112 and the fourth electrical connector 3122 are electrically connected to the first discharge port 112 of the battery device 1100 through the second switching module 322. In this way, the second switching module 322 can control whether the second electrical connector 3112 and the fourth electrical connector 3122 are electrically connected to the first discharge port 112. If the first discharge port 112 needs to discharge, the second switching module 322 can connect the second electrical connector 3112 and the fourth electrical connector 3122 to the first discharge port 112, thereby realizing the discharge of the battery cell assembly 100. If discharge is not required or an abnormal discharge occurs, the second switching module 322 can disconnect the circuit between the second electrical connector 3112 and the fourth electrical connector 3122 and the first discharge port 112 to protect the electrical components in the discharge circuit.

[0121] The second switching module 322 can be directly electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122. The first switching module 321 can also be electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122 through components such as copper busbars and wires. The second switching module 322 can be directly electrically connected to the first discharge interface 112. The second switching module 322 and the first discharge interface 112 can also be electrically connected through components such as copper busbars and wires.

[0122] For example, the first on / off module 321 may include a relay to control the on / off state of the circuit.

[0123] The first charging interface 111 can refer to the interface of the battery device 1100 used for charging, and the first discharging interface 112 can refer to the interface of the battery device 1100 used for discharging. The first discharging interface 112 can be electrically connected to the power system of the power device to supply power to the power system of the power device.

[0124] By adopting the technical solution of this embodiment, the positive and negative terminals of the battery cell assembly 100 within the battery device 1100 are electrically connected to the first electrical connector 3111 and the third electrical connector 3121, respectively. The second electrical connector 3112 and the fourth electrical connector 3122 are electrically connected to the first charging interface 111 and the first discharging interface 112 of the battery device 1100, thereby realizing the charging and discharging of the battery device 1100. The first on / off module 321 and the second on / off module 322 can respectively control the on / off control of the circuit between the device body 310 and the first charging interface 111 and the first discharging interface 112, thereby realizing the charging and discharging control of the battery device 1100. Since the optional module 320 also includes at least one of a first switching module 321 and a second switching module 322, and both the first switching module 321 and the second switching module 322 are separate from the main body 310, the first switching module 321 and the second switching module 322 can be separated from the main body 310. This allows for the selection of either the first switching module 321 or the second switching module 322 according to actual needs, enabling different electrical architectures and meeting the requirements of different platforms and electrical architectures, thus increasing the compatibility of the power distribution device 300. The modular structure of the first switching module 321 and the second switching module 322 also facilitates the standardized design of the power distribution device 300.

[0125] In some cases, customized design not only hinders the reuse of the power distribution device 300 across platforms and vehicle models, but may also lead to a waste of R&D resources and increased costs. It may also cause problems such as design complexity, extended design cycle and verification cycle. However, the power distribution device 300 provided in this application embodiment can improve the versatility of the power distribution device 300 under different platforms and architectures by flexibly selecting the optional module 320. It can also help reduce the design cycle and verification cycle of the optional module 320, improve the reusability of the internal components of the power distribution device 300, and reduce the design and manufacturing cost of the power distribution device 300.

[0126] In some embodiments, the first electrical connector 3111 and the second electrical connector 3112 are disposed on the base 3101, so that different types of first switching devices 3113 and second switching devices 3123 can be installed on the base 3101, thereby changing the functional characteristics of the power distribution device 300 to meet different needs. However, the first electrical connector 3111, the second electrical connector 3112, the third electrical connector 3121 and the fourth electrical connector 3122 can be reused without repeated configuration.

[0127] In some embodiments, the power distribution device 300 includes a housing, and the device body 310 and the optional module 320 can be installed inside the housing.

[0128] In some embodiments, the power distribution device 300 is not provided with a housing, and the main body 310 and the optional module 320 are directly installed inside the enclosure 200.

[0129] In some embodiments, the first on / off module 321 includes a first housing 3211, a first switch K31 and a second switch K32. The first switch K31 and the second switch K32 are located inside the first housing 3211. The first switch K31 is connected in series between the second electrical connector 3112 and the positive terminal of the first charging interface 111, and the second switch K32 is connected in series between the fourth electrical connector 3122 and the negative terminal of the first charging interface 111.

[0130] The first housing 3211 can refer to the housing structure of the first switching module 321. The shape of the first housing 3211 can be various, such as rectangular, cylindrical, etc. The first housing 3211 provides installation space for the first switch K31 and the second switch K32. The first switch K31 and the second switch K32 are located in the internal cavity of the first housing 3211. The first housing 3211 can be made of insulating plastic or alloy material.

[0131] The first switch K31 can refer to a switching element connected in series between the second electrical connector 3112 and the positive terminal of the first charging interface 111; the switching element can be a relay, semiconductor switch, etc.

[0132] The first switch K31 can be fixed inside the first housing 3211 by means of bolts, snap-fit, etc.

[0133] The first switch K31 and the second electrical connector 3112 can be electrically connected through components such as copper busbars and wires. The first switch K31 and the positive terminal of the first charging interface 111 can also be electrically connected through components such as copper busbars and wires.

[0134] The second switch K32 can refer to a switching element connected in series between the fourth electrical connector 3122 and the negative terminal of the first charging interface 111.

[0135] The second switch K32 can be fixed inside the first housing 3211 by means of bolts, snap-fit, etc.

[0136] The second switch K32 and the fourth electrical connector 3122 can be electrically connected via copper busbars, wires, or other components. The second switch K32 and the negative terminal of the first charging interface 111 can also be electrically connected via copper busbars, wires, or other components.

[0137] By adopting the technical solution of this embodiment, the first housing 3211 provides protection for the first switch K31 and the second switch K32. The first housing 3211 can also connect the first switch K31 and the second switch K32 into a modular component, thereby facilitating the formation of standardized components and making it easier to select the first switching module 321. In addition, the first switch K31 can disconnect the circuit between the second electrical connector 3112 and the positive terminal of the first charging interface 111, and the second switch K32 can disconnect the circuit between the fourth electrical connector 3122 and the negative terminal of the first charging interface 111. This disconnects two circuits, which helps to improve the reliability of power-off and reduce the residual faults caused by incomplete disconnection of a single circuit.

[0138] In some embodiments, the second switching module 322 includes a second housing 3221 and a third switch K41 and a fourth switch K42 disposed within the second housing 3221. The third switch K41 and the fourth switch K42 are located within the second housing 3221. The third switch K41 is connected in series between the positive terminal of the second electrical connector 3112 and the first discharge interface 112, and the fourth switch K42 is connected in series between the fourth electrical connector 3122 and the negative terminal of the first discharge interface 112.

[0139] The second housing 3221 can refer to the housing structure of the second switching module 322. The shape of the second housing 3221 can be various, such as rectangular, cylindrical, etc. The second housing 3221 provides installation space for the third switch K41 and the fourth switch K42. The third switch K41 and the fourth switch K42 are located in the internal cavity of the second housing 3221. The second housing 3221 can be made of insulating plastic or alloy material.

[0140] The third switch K41 can refer to a switching element connected in series between the positive terminal of the second electrical connector 3112 and the first discharge interface 112.

[0141] The third switch K41 can be fixed inside the second housing 3221 by means of bolts, snap-fit, etc.

[0142] The third switch K41 and the second electrical connector 3112 can be electrically connected through components such as copper busbars and wires. The third switch K41 and the positive terminal of the first discharge interface 112 can also be electrically connected through components such as copper busbars and wires.

[0143] The fourth switch K42 can refer to a switching element connected in series between the fourth electrical connector 3122 and the negative terminal of the first discharge interface 112.

[0144] The fourth switch K42 can be fixed inside the second housing 3221 by means of bolts, snap-fit, etc.

[0145] The fourth switch K42 and the fourth electrical connector 3122 can be electrically connected via copper busbars, wires, or other components. The fourth switch K42 and the negative terminal of the first discharge interface 112 can also be electrically connected via copper busbars, wires, or other components.

[0146] By adopting the technical solution of this embodiment, the second housing 3221 provides protection for the third switch K41 and the fourth switch K42. The second housing 3221 can also connect the third switch K41 and the fourth switch K42 into a modular component, thereby facilitating the formation of standardized components and making it easier to select the second switching module 322. In addition, the third switch K41 can disconnect the circuit between the second electrical connector 3112 and the positive terminal of the first discharge interface 112, and the fourth switch K42 can disconnect the circuit between the fourth electrical connector 3122 and the negative terminal of the first discharge interface 112, thereby disconnecting two circuits, which helps to improve the reliability of power disconnection and reduce the residual faults caused by incomplete disconnection of a single circuit.

[0147] In some embodiments, the optional module 320 further includes a first fuse protection module 323. The first fuse protection module 323 and the device body 310 are separate structures. The first fuse protection module 323 is used to electrically connect the second charging interface 113 of the battery device 1100 to the second electrical connector 3112 and the fourth electrical connector 3122. The first charging interface 111 is a DC charging interface and the second charging interface 113 is an AC charging interface.

[0148] The battery device 1100 has two charging interfaces, one of which is a DC charging interface, i.e. a fast charging interface, and the other is an AC charging interface, i.e. a slow charging interface.

[0149] The first fuse protection module 323 can refer to a module formed by integrating fuse protection electrical components between the second charging interface 113 and the second electrical connector 3112 and the fourth electrical connector 3122. The first fuse protection module 323 is used to disconnect the circuit between the second charging interface 113 and the second electrical connector 3112 and the fourth electrical connector 3122 in case of a fault, thus providing overcurrent protection. The first fuse protection module 323 may include a fuse, a current sensor, and other electrical components.

[0150] The first fuse protection module 323 and the device body 310 are separate structures, which means that the electrical components in the first fuse protection module 323 and the device body 310 have independent mounting bases and are not integrated in the same housing.

[0151] For example, the electrical components of the device body 310 and the electrical components of the first fuse protection module 323 are integrated in different housings.

[0152] The first fuse protection module 323 is separable from the device body 310. The first fuse protection module 323 and the device body 310 are independent components. They may not be connected, or they may be connected by detachable means such as bolts or snap-fits. Furthermore, the separability of the first fuse protection module 323 from the device body 310 allows the first fuse protection module 323 to be independent of the device body 310, thus enabling optional installation of the first fuse protection module 323.

[0153] The first fuse protection module 323, the first switching module 321, and the second switching module 322 are separate structures.

[0154] The first fuse protection module 323 can be directly electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122. The first fuse protection module 323 can also be electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122 through components such as copper busbars and wires. The first fuse protection module 323 can be directly electrically connected to the second charging interface 113. The first fuse protection module 323 can also be electrically connected to the second charging interface 113 through components such as copper busbars and wires.

[0155] By adopting the technical solution of this embodiment, a first fuse protection module 323 can be optionally equipped to meet the needs of different electrical platforms and electrical architectures. When the second charging interface 113 is connected to the charging circuit, the first fuse protection module 323 plays the role of overcurrent protection, improving the reliability of the battery device 1100. The configuration of the first charging interface 111 and the second charging interface 113 also allows for flexible selection of charging methods to meet different needs.

[0156] In some embodiments, the first fuse protection module 323 includes a third housing 3231 and a first fuse B4 and a first current detection element CS2 disposed within the third housing 3231. The first fuse B4 is connected in series between the positive terminal of the second electrical connector 3112 and the second charging interface 113, and the first current detection element CS2 is connected in series between the negative terminal of the fourth electrical connector 3122 and the second charging interface 113.

[0157] The third housing 3231 can refer to the housing structure of the first fuse protection module 323. The shape of the third housing 3231 can be various, such as rectangular, cylindrical, etc. The third housing 3231 provides installation space for the first fuse B4 and the first current detection element CS2. The first fuse B4 and the first current detection element CS2 are located in the internal cavity of the third housing 3231. The third housing 3231 can be made of insulating plastic or alloy material.

[0158] The first fuse B4 can refer to a fusible protective element connected in series between the second electrical connector 3112 and the positive terminal of the second charging interface 113. The first fuse B4 can be a fast-acting fuse, a time-delay fuse, etc.

[0159] When the charging circuit corresponding to the second charging interface 113 is overloaded, the first fuse B4 can blow, thereby disconnecting the second charging interface 113 from the main body 310 of the device, thus protecting the electrical components in the charging circuit and improving the reliability of the power distribution device 300.

[0160] The first fuse B4 can be fixed inside the third housing 3231 by means of bolts, snap-fit, etc.

[0161] The first fuse B4 and the second electrical connector 3112 can be electrically connected through components such as copper busbars and wires. The first fuse B4 and the positive terminal of the second charging interface 113 can also be electrically connected through components such as copper busbars and wires.

[0162] The first current sensing element CS2 can refer to a current sensing element connected in series between the fourth electrical connector 3122 and the negative terminal of the second charging interface 113, such as a current sensor.

[0163] The first current detection element CS2 can detect the current in the charging circuit corresponding to the second charging interface 113, thereby detecting the charging status of the second charging interface 113 in real time.

[0164] The first current sensing element CS2 can be fixed inside the third housing 3231 by means of bolts, snap-fit, etc.

[0165] The first current sensing element CS2 and the fourth electrical connector 3122 can be electrically connected via copper busbars, wires, or other components. The first current sensing element CS2 and the negative terminal of the second charging interface 113 can also be electrically connected via copper busbars, wires, or other components.

[0166] By adopting the technical solution of this embodiment, the third housing 3231 provides protection for the first fuse B4 and the first current detection element CS2. The third housing 3231 can also connect the first fuse B4 and the first current detection element CS2 into a modular component, thereby facilitating the formation of standardized components and the selection of the first fuse protection module 323. The first fuse B4 can disconnect the circuit in time when an overload occurs, which helps to improve the reliability of the power distribution device 300. In addition, the first current detection element CS2 can detect the current in the circuit, so as to monitor the charging status of the second charging interface 113 in real time.

[0167] In some embodiments, the optional module 320 further includes a second fuse protection module 324, which is a separate structure from the device body 310. The second fuse protection module 324 is used to electrically connect between the second discharge interface 114 of the battery device 1100 and the second electrical connector 3112 and the fourth electrical connector 3122. The first discharge interface 112 is used to electrically connect to the drive component of the wheel of the vehicle 1000, and the second discharge interface 114 is used to electrically connect to the on-board converter.

[0168] In vehicle 1000, the wheels are driven to rotate by drive components, thus enabling movement. These drive components include a motor controller and a drive motor. High-voltage DC power output from the battery unit 1100 is distributed by the power distribution unit 300 and then sent to the motor controller (MCU). The motor controller converts the DC power into three-phase AC power, driving the drive motors of the wheels and causing them to rotate. However, the rotation of the wheels requires a large current and high power input to meet the driving and acceleration requirements of vehicle 1000; its operating current can reach several hundred amperes or even higher. Simultaneously, vehicle 1000 also contains low-voltage electrical components (e.g., central control, headlights, windshield wipers). An on-board converter can convert the high-voltage battery power into low-voltage power to supply these low-voltage components. Because the power requirements of the wheel drive components and the low-voltage components differ significantly, the battery unit 1100 is equipped with different discharge interfaces to power different components, improving power supply reliability. This on-board converter can be called an on-board DC-DC converter.

[0169] The battery device 1100 has multiple discharge ports, wherein the discharge port for electrical connection with the drive components of the wheels of the vehicle 1000 is the first discharge port 112, so that the electrical energy of the battery cell assembly 100 can be distributed to the drive components of the vehicle 1000 through the first discharge port 112; and the discharge port for electrical connection with the on-board converter is the second discharge port 114, so that the electrical energy of the battery cell assembly 100 can be distributed to low-voltage electrical devices through the second discharge port 114 and the on-board converter.

[0170] The number of first discharge ports 112 can be one or more. For example, the number of first discharge ports 112 is two, one of which is used to supply power to the drive components of the front wheel, and the other is used to supply power to the drive components of the rear wheel.

[0171] The second fuse protection module 324 can refer to a module formed by integrating fuse protection electrical components between the second discharge interface 114, the second electrical connector 3112, and the fourth electrical connector 3122. The second fuse protection module 324 is used to disconnect the circuit between the second discharge interface 114 and the second electrical connector 3112 and the fourth electrical connector 3122 in case of a fault, thus providing overcurrent protection. The second fuse protection module 324 may include a fuse, a current sensor, and other electrical components.

[0172] The second fuse protection module 324 and the device body 310 are separate structures, which means that the electrical components in the second fuse protection module 324 and the device body 310 have independent mounting bases and are not integrated in the same housing.

[0173] For example, the electrical components of the device body 310 and the electrical components of the second fuse protection module 324 are integrated in different housings.

[0174] The second fuse protection module 324 is separable from the device body 310. The second fuse protection module 324 and the device body 310 are independent components. They may not be connected, or they may be connected by detachable means such as bolts or snap-fits. Furthermore, the separability of the second fuse protection module 324 from the device body 310 allows the second fuse protection module to be independent of the device body 310, thus enabling optional installation of the second fuse protection module 324.

[0175] The first fuse protection module 323, the second fuse protection module 324, the first on / off module 321, and the second on / off module 322 are separate structures.

[0176] The second fuse protection module 324 can be directly electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122. The second fuse protection module 324 can also be electrically connected to the second electrical connector 3112 and the fourth electrical connector 3122 through components such as copper busbars and wires. The second fuse protection module 324 can be directly electrically connected to the second discharge interface 114. The second fuse protection module 324 can also be electrically connected to the second discharge interface 114 through components such as copper busbars and wires.

[0177] By adopting the technical solution of this embodiment, a second fuse protection module 324 can be optionally equipped to meet the needs of different electrical platforms and electrical architectures. When the second discharge interface 114 is connected to the vehicle converter, the second fuse protection module 324 plays the role of overcurrent protection, improving the reliability of the battery device 1100. The arrangement of the first discharge interface 112 and the second discharge interface 114 can distribute electrical energy to different components to meet different needs.

[0178] In some embodiments, the second fuse protection module 324 includes a fourth housing 3241 and a second fuse B3 and a second current detection element CS1 disposed within the fourth housing 3241. The second fuse B3 is connected in series between the positive terminal of the second electrical connector 3112 and the second discharge interface 114, and the second current detection element CS1 is connected in series between the negative terminal of the fourth electrical connector 3122 and the second discharge interface 114.

[0179] The fourth housing 3241 can refer to the housing structure of the second fuse protection module 324. The shape of the fourth housing 3241 can be various, such as rectangular, cylindrical, etc. The fourth housing 3241 provides installation space for the second fuse B3 and the second current detection element CS1. The second fuse B3 and the second current detection element CS1 are located in the internal cavity of the fourth housing 3241. The fourth housing 3241 can be made of insulating plastic or alloy material.

[0180] The second fuse B3 can refer to a fusible protective element connected in series between the positive terminal of the second electrical connector 3112 and the second discharge interface 114. The second fuse B3 can be a fast-acting fuse, a time-delay fuse, etc.

[0181] In the event of an overload in the discharge circuit corresponding to the second discharge interface 114, the second fuse B3 can melt and disconnect the circuit between the second discharge interface 114 and the main body 310 of the device, thereby protecting the electrical components in the discharge circuit and improving the reliability of the power distribution device 300.

[0182] The second fuse B3 can be fixed inside the fourth housing 3241 by means of bolts, clips, etc.

[0183] The second fuse B3 and the second electrical connector 3112 can be electrically connected through components such as copper busbars and wires. The second fuse B3 and the positive terminal of the second discharge interface 114 can also be electrically connected through components such as copper busbars and wires.

[0184] The second current sensing element CS1 can refer to a current sensing element connected in series between the fourth electrical connector 3122 and the negative terminal of the second discharge interface 114.

[0185] The second current detection element CS1 can detect the current in the discharge circuit corresponding to the second discharge interface 114, thereby detecting the discharge status of the second discharge interface 114 in real time.

[0186] The second current sensing element CS1 can be fixed inside the fourth housing 3241 by means of bolts, snap-fit, etc.

[0187] The second current detection element CS1 and the fourth electrical connector 3122 can be electrically connected via copper busbars, wires, or other components. The second current detection element CS1 and the negative terminal of the second discharge interface 114 can also be electrically connected via copper busbars, wires, or other components.

[0188] By adopting the technical solution of this embodiment, the fourth housing 3241 provides protection for the second fuse B3 and the second current detection element CS1. The fourth housing 3241 can also connect the second fuse B3 and the second current detection element CS1 into a modular component, which facilitates the formation of standardized components and the selection of the second fuse protection module 324. The second fuse B3 can disconnect the circuit in time when the circuit is overloaded, which helps to improve the reliability of the power distribution device 300. In addition, the second current detection element CS1 can detect the current in the circuit, so as to monitor the discharge status of the second discharge interface 114 in real time.

[0189] In some embodiments, the battery cell assembly 100 includes a first battery cell assembly M2 and a second battery cell assembly M1; the power distribution device 300 further includes a conversion mechanism 330, which is a separate structure from the device body 310. The first battery cell assembly M2 and the second battery cell assembly M1 are electrically connected to the first electrical connector 3111 and the third electrical connector 3121 through the conversion mechanism 330. The conversion mechanism 330 can convert the first battery cell assembly M2 and the second battery cell assembly M1 in series and parallel.

[0190] There are multiple battery cell modules 100, some of which are first battery cell modules M2 and some of which are second battery cell modules M1. The number of first battery cell modules M2 and the number of second battery cell modules M1 are one or more. The structure of the first battery cell module M2 may be the same as or different from the structure of the second battery cell module M1.

[0191] For example, there are two battery cell modules 100, one of which is a first battery cell module M2 and the other is a second battery cell module M1.

[0192] The conversion mechanism 330 can refer to a component used to convert the series-parallel connection mode between the first battery cell assembly M2 and the second battery cell assembly M1. The conversion mechanism 330 includes multiple switching elements, which are disposed between the device body 310 and the first battery cell assembly M2 and the second battery cell assembly M1. Through the switching cooperation of the multiple switching elements, the series-parallel connection conversion between the first battery cell assembly M2 and the second battery cell assembly M1 is realized.

[0193] The conversion mechanism 330 connects the first battery cell assembly M2 and the second battery cell assembly M1 in series, resulting in a high charging and discharging voltage for the battery device 1100, suitable for charging and discharging under high-voltage conditions. Conversely, the conversion mechanism 330 connects the first battery cell assembly M2 and the second battery cell assembly M1 in parallel, resulting in a low charging and discharging voltage for the battery device 1100, suitable for charging and discharging under low-voltage conditions. Thus, through the conversion mechanism 330, the battery device 1100 can be used for charging and discharging under both high and low voltage conditions, meeting different usage requirements. For example, the high voltage can be 800V, and the low voltage can be 400V.

[0194] The conversion mechanism 330 and the device body 310 are separate structures, which means that the electrical components in the conversion mechanism 330 and the device body 310 have independent mounting bases and are not integrated in the same housing.

[0195] For example, the electrical components of the device body 310 and the electrical components of the conversion mechanism 330 are integrated in different housings.

[0196] The conversion mechanism 330 is separable from the device body 310. The conversion mechanism 330 and the device body 310 are independent components. There may be no connection between the conversion mechanism 330 and the device body 310, or they may be connected together by detachable means such as bolts or snap-fits. In addition, the separability of the conversion mechanism 330 from the device body 310 allows the conversion mechanism 330 to be independent of the device body 310, thereby enabling optional installation of the conversion mechanism 330.

[0197] The conversion mechanism 330 can be directly electrically connected to the first electrical connector 3111 and the third electrical connector 3121. The conversion mechanism 330 can also be electrically connected to the first electrical connector 3111 and the third electrical connector 3121 through components such as copper busbars and wires. The conversion mechanism 330 can be directly electrically connected to the first battery cell assembly M2 and the second battery cell assembly M1. The conversion mechanism 330 can also be electrically connected to the first battery cell assembly M2 and the second battery cell assembly M1 through components such as copper busbars and wires.

[0198] By adopting the technical solution of this embodiment, a conversion mechanism 330 can be optionally installed to meet the charging and discharging requirements of different voltages.

[0199] In some embodiments, the switching mechanism 330 includes a fifth switch K2, a first switch module 331, and a second switch module 332. The positive terminal of the first battery cell assembly M2 is electrically connected to the first electrical connector 3111, and the negative terminal of the second battery cell assembly M1 is electrically connected to the third electrical connector 3121. The fifth switch K2 is connected in series between the negative terminal of the first battery cell assembly M2 and the positive terminal of the second battery cell assembly M1. One end of the first switch module 331 is electrically connected between the fifth switch K2 and the negative terminal of the first battery cell assembly M2, and the other end of the first switch module 331 is electrically connected to the fourth electrical connector 3122. One end of the second switch module 332 is electrically connected between the fifth switch K2 and the positive terminal of the second battery cell assembly M1, and the other end of the second switch module 332 is electrically connected to the first electrical connector 3111.

[0200] The fifth switch K2 can refer to a switching element connected in series between the negative terminal of the first battery cell assembly M2 and the positive terminal of the second battery cell assembly M1.

[0201] The fifth switch K2 can be directly electrically connected to the negative terminal of the first battery cell assembly M2, or it can be electrically connected through components such as copper busbars and wires. The fifth switch K2 can be directly electrically connected to the positive terminal of the second battery cell assembly M1, or it can be electrically connected through components such as copper busbars and wires.

[0202] The negative terminal of the first battery cell assembly M2 has two branches. One branch is electrically connected to the positive terminal of the second battery cell assembly M1 via the fifth switch K2, and the other branch is electrically connected to the fourth electrical connector 3122 via the first switch module 331. The first switch module 331 is used to control the on / off state of the corresponding branch, and the first switch module 331 includes a switching element.

[0203] The positive terminal of the second battery cell assembly M1 has two branches. One branch is electrically connected to the negative terminal of the first battery cell assembly M2 via the fifth switch K2, and the other branch is electrically connected to the second electrical connector 3112 via the second switch module 332. The second switch module 332 is used to control the on / off state of the corresponding branch, and the second switch module 332 includes a switching element.

[0204] When the fifth switch K2 is closed, the first switch module 331 and the second switch module 332 are disconnected, and the first battery cell assembly M2 and the second battery cell assembly M1 are connected in series.

[0205] When the fifth switch K2 is open, the first switch module 331 and the second switch module 332 are closed, and the first battery cell assembly M2 and the second battery cell assembly M1 are connected in parallel.

[0206] When the fifth switch K2 is open, the first switch module 331 is closed, and the second switch module 332 is open, the second battery cell component M1 is not connected to the main body 310, and the first battery cell component M2 is connected to the main body 310, enabling the first battery cell component M2 to be charged and discharged independently. In addition, when the second battery cell component M1 malfunctions, it is not connected to the main body 310, and the first battery cell component M2 can be charged and discharged independently, allowing the vehicle 1000 and other electrical devices to continue to be used.

[0207] When the fifth switch K2 is open, the first switch module 331 is open, the second switch module 332 is closed, the second battery cell module M1 is connected to the main body 310, and the first battery cell module M2 is not connected to the main body 310, enabling the second battery cell module M1 to be charged and discharged independently. In addition, when the first battery cell module M2 fails, the first battery cell module M2 is not connected to the main body 310, and the second battery cell module M1 can be charged and discharged independently, allowing the vehicle 1000 and other electrical devices to continue to be used.

[0208] By adopting the technical solution of this embodiment, the series-parallel switching of the first battery cell module M2 and the second battery cell module M1 can be realized, as well as the independent charging and discharging of the first battery cell module M2 and the second battery cell module M1, to meet the needs of more usage scenarios.

[0209] In some embodiments, the first switch module 331 and the second switch module 332 are separate structures.

[0210] The first switch module 331 and the second switch module 332 are separate structures, which means that the electrical components in the first switch module 331 and the second switch module 332 have independent mounting bases and are not integrated in the same housing.

[0211] For example, the electrical components of the second switch module 332 and the electrical components of the first switch module 331 are integrated in different housings.

[0212] The first switch module 331 and the second switch module 332 are separable. The first switch module 331 and the second switch module 332 are independent components. The first switch module 331 and the second switch module 332 may not have a connection relationship, or they may be connected together by detachable means such as bolts or snap-fits.

[0213] The first switch module 331, the second switch module 332, the first fuse protection module 323, the second fuse protection module 324, the first on / off module 321, and the second on / off module 322 are of a split structure.

[0214] By adopting the technical solution of this embodiment, the first switch module 331 and the second switch module 332 are separate structures, so that the first switch module 331 and the second switch module 332 can be flexibly installed in different positions. In addition, the first switch module 331 and the second switch module 332 are independent modules, which also facilitates the formation of standardized components and facilitates the standardized design of the power distribution device 300.

[0215] In some embodiments, the first switch module 331 and the second switch module 332 may also be integrated components, for example, the electrical components of the first switch module 331 and the electrical components of the second switch module 332 are installed in the same housing.

[0216] See Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the first switch module 331 includes a fifth housing 3311 and a sixth switch K3 and a third fuse B2 disposed within the fifth housing 3311. The sixth switch K3 and the third fuse B2 are connected in series between the negative terminal of the first battery cell assembly M2 and the third electrical connector 3121. The second switch module 332 includes a sixth housing 3321 and a seventh switch K1 and a fourth fuse B1 disposed within the sixth housing 3321. The seventh switch K1 and the fourth fuse B1 are connected in series between the positive terminal of the second battery cell assembly M1 and the first electrical connector 3111.

[0217] The fifth housing 3311 can refer to the housing structure of the first switch module 331. The shape of the fifth housing 3311 can be various, such as rectangular, cylindrical, etc. The fifth housing 3311 provides installation space for the third fuse B2 and the sixth switch K3. The third fuse B2 and the sixth switch K3 are located in the internal cavity of the fifth housing 3311. The fifth housing 3311 can be made of insulating plastic or alloy material.

[0218] The third fuse B2 can refer to a fusible protective element connected in series between the third electrical connector 3121 and the negative terminal of the first battery cell assembly M2. The third fuse B2 can be a fast-acting fuse, a time-delay fuse, etc.

[0219] When the first battery cell assembly M2 and the second battery cell assembly M1 are connected in parallel, and the circuit containing the third fuse B2 is overloaded, the third fuse B2 can melt, thereby disconnecting the circuit between the first battery cell assembly M2 and the main body 310 of the device, thus protecting the electrical components in the circuit and improving the reliability of the power distribution device 300.

[0220] The third fuse B2 can be fixed inside the fifth housing 3311 by means of bolts, clips, etc.

[0221] The third fuse B2 and the third electrical connector 3121 can be electrically connected through components such as copper busbars and wires. The third fuse B2 and the negative terminal of the first battery cell assembly M2 can also be electrically connected through components such as copper busbars and wires.

[0222] The sixth switch K3 can refer to a switching element connected in series between the third electrical connector 3121 and the negative terminal of the first battery cell assembly M2. The sixth switch K3 can disconnect the circuit between the third electrical connector 3121 and the negative terminal of the first battery cell assembly M2.

[0223] One end of the third fuse B2 is electrically connected to the third electrical connector 3121, and the other end of the third fuse B2 is electrically connected to one end of the sixth switch K3. The other end of the sixth switch K3 is electrically connected to the negative terminal of the first battery cell assembly M2. Alternatively, one end of the third fuse B2 is electrically connected to the negative terminal of the first battery cell assembly M2, and the other end of the third fuse B2 is electrically connected to one end of the sixth switch K3. The other end of the sixth switch K3 is electrically connected to the third electrical connector 3121. In this way, the sixth switch K3 and the third fuse B2 can be connected in series between the third electrical connector 3121 and the negative terminal of the first battery cell assembly M2.

[0224] The sixth housing 3321 can refer to the housing structure of the second switch module 332. The shape of the sixth housing 3321 can be various, such as rectangular, cylindrical, etc. The sixth housing 3321 provides installation space for the fourth fuse B1 and the seventh switch K1. The fourth fuse B1 and the seventh switch K1 are located in the internal cavity of the sixth housing 3321. The sixth housing 3321 can be made of insulating plastic or alloy material.

[0225] The fourth fuse B1 can refer to a fusible protective element connected in series between the first electrical connector 3111 and the positive terminal of the second battery cell assembly M1. The fourth fuse B1 can be a fast-acting fuse, a time-delay fuse, etc.

[0226] When the first battery cell assembly M2 and the second battery cell assembly M1 are connected in parallel, if the circuit containing the fourth fuse B1 is overloaded, the fourth fuse B1 can melt and disconnect the circuit between the second battery cell assembly M1 and the main body 310 of the device, thereby protecting the electrical components in the circuit and improving the reliability of the power distribution device 300.

[0227] The fourth fuse B1 can be fixed inside the sixth housing 3321 by means of bolts, snap-fit, etc.

[0228] The fourth fuse B1 can be electrically connected to the first electrical connector 3111 via a copper busbar, wires, or other components. The fourth fuse B1 can also be electrically connected to the positive terminal of the second battery cell assembly M1 via a copper busbar, wires, or other components.

[0229] The seventh switch K1 can refer to a switching element connected in series between the first electrical connector 3111 and the positive terminal of the second battery cell assembly M1. The seventh switch K1 can disconnect the circuit between the first electrical connector 3111 and the positive terminal of the second battery cell assembly M1, thereby disconnecting the second battery cell assembly M1 from the device body 310.

[0230] The seventh switch K1 can be fixed inside the sixth housing 3321 by means of bolts, snap-fit, etc.

[0231] One end of the fourth fuse B1 is electrically connected to the first electrical connector 3111, and the other end of the fourth fuse B1 is electrically connected to one end of the seventh switch K1. The other end of the seventh switch K1 is electrically connected to the positive terminal of the second battery cell assembly M1. Alternatively, one end of the fourth fuse B1 is electrically connected to the positive terminal of the second battery cell assembly M1, and the other end of the fourth fuse B1 is electrically connected to one end of the seventh switch K1. The other end of the seventh switch K1 is electrically connected to the first electrical connector 3111. In this way, the seventh switch K1 and the fourth fuse B1 can be connected in series between the first electrical connector 3111 and the positive terminal of the second battery cell assembly M1.

[0232] By adopting the technical solution of this embodiment, the fifth housing 3311 provides protection for the third fuse B2 and the sixth switch K3. The fifth housing 3311 can also connect the third fuse B2 and the sixth switch K3 into a modular component. The sixth housing 3321 provides protection for the fourth fuse B1 and the seventh switch K1. The sixth housing 3321 can also connect the fourth fuse B1 and the seventh switch K1 into a modular component, which facilitates the formation of standardized components for the first switch module 331 and the second switch module 332. The third fuse B2 and the fourth fuse B1 can disconnect the circuit in time when the circuit is overloaded, which helps to improve the reliability of the power distribution device 300. In addition, the sixth switch K3 and the sixth switch, together with the fifth switch K2, can realize the series-parallel conversion of the first battery cell assembly M2 and the second battery cell assembly M1.

[0233] In some embodiments, the power distribution device 300 further includes a filter 340, which is electrically connected between the optional module 320 and the first electrical connector 3111 and the fourth electrical connector 3122.

[0234] Filter 340 can refer to a filtering device composed of common-mode inductors, differential-mode inductors, filter capacitors, and other components. It can be used in high-voltage DC circuit environments to effectively suppress electromagnetic interference and purify power signals.

[0235] In some cases, the switching elements inside the power distribution unit 300 generate high-frequency electromagnetic pulses when they are switched on and off. High-voltage components such as the drive motor and on-board charger also release electromagnetic interference signals when they are working. At the same time, electromagnetic signals from the external environment may also intrude into the internal circuitry of the power distribution unit 300. This electromagnetic interference can affect the normal operation of sensitive electronic components such as the vehicle controller, battery management system, and in-vehicle audio-visual equipment, and may even lead to component malfunctions or communication failures.

[0236] By adopting the technical solution of this embodiment, the filter 340 can attenuate or bypass the interference signal to ground, cut off its propagation path, and improve the stability of the circuit system operation.

[0237] In some embodiments, the base 3101 includes a seventh housing 3114 and an eighth housing 3124 that are separately disposed. A first electrical connector 3111, a second electrical connector 3112 and a first switching device 3113 are disposed in the seventh housing 3114, and a third electrical connector 3121, a fourth electrical connector 3122 and a second switching device 3123 are disposed in the eighth housing 3124.

[0238] The seventh housing 3114 can refer to the mounting base for the first electrical connector 3111, the second electrical connector 3112, and the first switching device 3113. The seventh housing 3114 is a housing structure. The first switching device 3113 is disposed within the seventh housing 3114. The first electrical connector 3111 and the second electrical connector 3112 are mounted on the seventh housing 3114 to fix the first electrical connector 3111, the second electrical connector 3112, and the first switching device 3113. The material of the seventh housing 3114 can be insulating plastic or aluminum alloy, etc.

[0239] One end of the first electrical connector 3111 is electrically connected to the first switching device 3113, and the other end of the first electrical connector 3111 protrudes from the seventh housing 3114 to facilitate electrical connection with the positive electrode of the battery cell assembly 100. One end of the second electrical connector 3112 is electrically connected to the first switching device 3113, and the other end of the second electrical connector 3112 protrudes from the seventh housing 3114 to facilitate electrical connection with the optional module 320.

[0240] The eighth housing 3124 can refer to the mounting base for the third electrical connector 3121, the fourth electrical connector 3122, and the second switching device 3123. The second switching device 3123 is disposed within the eighth housing 3124, and the third electrical connector 3121 and the fourth electrical connector 3122 are mounted on the eighth housing 3124 to fix the third electrical connector 3121, the fourth electrical connector 3122, and the second switching device 3123. The material of the eighth housing 3124 can be insulating plastic or aluminum alloy, etc.

[0241] One end of the third electrical connector 3121 is electrically connected to the second switching device 3123, and the other end of the third electrical connector 3121 protrudes from the eighth housing 3124 to facilitate electrical connection with the negative terminal of the battery cell assembly 100. One end of the fourth electrical connector 3122 is electrically connected to the second switching device 3123, and the other end of the fourth electrical connector 3122 protrudes from the eighth housing 3124 to facilitate electrical connection with the optional module 320.

[0242] The seventh housing 3114 and the eighth housing 3124 are separate structures, meaning that the second switching device 3123 and the first switching device 3113 have independent housings and are not integrated into the same housing. The second switching device 3123 and the first switching device 3113 are integrated into two different housings.

[0243] The seventh housing 3114 and the eighth housing 3124 are separable. The seventh housing 3114 and the eighth housing 3124 are independent components. The seventh housing 3114 and the eighth housing 3124 may not be connected, or they may be connected together by detachable means such as bolts or snap-fits. That is, the main body 310 of the device is divided into two modules, namely the main positive module and the main negative module. The main positive module includes the seventh housing 3114, the first electrical connector 3111, the second electrical connector 3112, and the first switching device 3113. The main negative module includes the eighth housing 3124, the third electrical connector 3121, the fourth electrical connector 3122, and the second switching device 3123.

[0244] By adopting the technical solution of this embodiment, the setting of the seventh housing 3114 and the eighth housing 3124 allows the main body 310 of the device to be divided into two independent parts, which can be flexibly installed in different positions, thus improving the space utilization rate within the battery device 1100.

[0245] In some embodiments, the first switching device 3113 includes a fifth fuse B11 and a main positive relay K11 disposed in the seventh housing 3114, and the fifth fuse B11 and the main positive relay K11 are connected in series between the first electrical connector 3111 and the second electrical connector 3112.

[0246] The fifth fuse B11 can refer to a fusible protective element connected in series between the first electrical connector 3111 and the second electrical connector 3112. The fifth fuse B11 can be a fast-acting fuse, a time-delay fuse, etc.

[0247] In the event of an overload in the circuit containing the fifth fuse B11, the fifth fuse B11 can melt and disconnect the circuit between the first electrical connector 3111 and the second electrical connector 3112, thereby protecting the electrical components in the circuit and improving the reliability of the power distribution device 300.

[0248] The fifth fuse B11 can be fixed inside the seventh housing 3114 by means of bolts, snap-fit, etc.

[0249] The main positive relay K11 can refer to a relay connected in series between the first electrical connector 3111 and the second electrical connector 3112. The main positive relay K11 can disconnect the circuit between the first electrical connector 3111 and the second electrical connector 3112.

[0250] One end of the fifth fuse B11 is electrically connected to the first electrical connector 3111, and the other end of the fifth fuse B11 is electrically connected to one contact terminal of the main positive relay K11. The other contact terminal of the main positive relay K11 is electrically connected to the second electrical connector 3112. Alternatively, one end of the fifth fuse B11 is electrically connected to the second electrical connector 3112, and the other end of the fifth fuse B11 is electrically connected to one contact terminal of the main positive relay K11. The other contact terminal of the main positive relay K11 is electrically connected to the first electrical connector 3111. In this way, the main positive relay K11 and the fifth fuse B11 can be connected in series between the first electrical connector 3111 and the second electrical connector 3112.

[0251] For example, the main positive relay K11 and the fifth fuse B11 can be directly electrically connected, or they can be electrically connected through components such as copper busbars and wires. The first electrical connector 3111 and the fifth fuse B11 can be directly electrically connected, or they can be electrically connected through components such as copper busbars and wires. The main positive relay K11 and the second electrical connector 3112 can be directly electrically connected, or they can be electrically connected through components such as copper busbars and wires.

[0252] By adopting the technical solution of this embodiment, the power transmission of the battery cell assembly 100 can be controlled by switching the main positive relay K11 on and off. At the same time, the fifth fuse B11 can disconnect the circuit in the event of an overload, which helps to improve the operational reliability of the circuit system.

[0253] In some embodiments, the seventh housing 3114 is provided with a first voltage sampling interface 3115 and a first control interface 3116. The first control interface 3116 is electrically connected to the main positive relay K11 to control the on / off state of the main positive relay K11. The first voltage sampling interface 3115 is used to output the potential information between the first electrical connector 3111, the second electrical connector 3112, the fifth fuse B11, and the main positive relay K11.

[0254] The first voltage sampling interface 3115 is used to output the potential information in the circuit of the positive module 311, thereby detecting the potential information in the circuit of the positive module 311. A first conductive element 3117 is electrically connected between the fifth fuse B11 and the main positive relay K11. The first conductive element 3111 forms a first sampling point U1, the first conductive element 3117 has a second sampling point U2, and the second conductive element 3112 has a third sampling point U3. The first voltage sampling interface 3115 is connected to the first sampling point U1, the second sampling point U2, and the third sampling point U3 to collect the potential information of the first sampling point U1, the second sampling point U2, and the third sampling point U3, thereby detecting the operating status of the positive module 311.

[0255] The first conductive component 3117 can be a copper busbar, wire, or other components.

[0256] The first control interface 3116 is used to be electrically connected to the control circuit, and the main positive relay K11 is controlled by inputting an electrical signal through the control circuit.

[0257] The first control interface 3116 is electrically connected to the control terminal of the main positive relay K11 (i.e., the terminal in the main positive relay K11 that is electrically connected to the coil), so as to control the on and off of the main positive relay K11 by means of the electrical signal input through the first control interface 3116.

[0258] By adopting the technical solution of this embodiment, the first voltage sampling interface 3115 and the first control interface 3116 are disposed in the seventh housing 3114. In this way, different types of fifth fuses B11 and main positive relays K11 can be installed in the seventh housing 3114, thereby changing the functional characteristics of the power distribution device 300 to meet different needs. However, the first voltage sampling interface 3115 and the first control interface 3116 can be reused without repeated configuration.

[0259] In some embodiments, the second switching device 3123 includes a sixth fuse B21 and a main negative relay K21 disposed in the eighth housing 3124, and the sixth fuse B21 and the main negative relay K21 are connected in series between the third electrical connector 3121 and the fourth electrical connector 3122.

[0260] The sixth fuse B21 can refer to a fusible protective element connected in series between the third electrical connector 3121 and the fourth electrical connector 3122. The sixth fuse B21 can be a fast-acting fuse, a time-delay fuse, etc.

[0261] In the event of an overload in the circuit containing the sixth fuse B21, the sixth fuse B21 can melt and disconnect the circuit between the third electrical connector 3121 and the fourth electrical connector 3122, thereby protecting the electrical components in the circuit and improving the reliability of the power distribution device 300.

[0262] The sixth fuse B21 can be fixed inside the eighth housing 3124 by means of bolts, snap-fit, etc.

[0263] The main negative relay K21 can refer to a relay connected in series between the third electrical connector 3121 and the fourth electrical connector 3122. The main negative relay K21 can disconnect the circuit between the third electrical connector 3121 and the fourth electrical connector 3122.

[0264] The main negative relay K21 can be fixed in the eighth housing 3124 by means of bolts, snap-fit, etc.

[0265] One end of the sixth fuse B21 is electrically connected to the third electrical connector 3121, and the other end of the sixth fuse B21 is electrically connected to one end of the main negative relay K21. The other end of the main negative relay K21 is electrically connected to the fourth electrical connector 3122. Alternatively, one end of the sixth fuse B21 is electrically connected to the fourth electrical connector 3122, and the other end of the sixth fuse B21 is electrically connected to one end of the main negative relay K21. The other end of the main negative relay K21 is electrically connected to the third electrical connector 3121. In this way, the main negative relay K21 and the sixth fuse B21 can be connected in series between the third electrical connector 3121 and the fourth electrical connector 3122.

[0266] For example, the main negative relay K21 and the sixth fuse B21 can be directly electrically connected, or they can be electrically connected through components such as copper busbars and wires. The third electrical connector 3121 and the sixth fuse B21 can be directly electrically connected, or they can be electrically connected through components such as copper busbars and wires. The main negative relay K21 and the fourth electrical connector 3122 can be directly electrically connected, or they can be electrically connected through components such as copper busbars and wires.

[0267] By adopting the technical solution of this embodiment, the power transmission of the battery cell assembly 100 can be controlled by switching the main and negative relays K21 on and off. At the same time, the sixth fuse B21 can disconnect the circuit in the event of an overload, which helps to improve the operational reliability of the circuit system.

[0268] In some embodiments, the eighth housing 3124 is provided with a second voltage sampling interface 3125 and a second control interface 3126. The second control interface 3126 is electrically connected to the main negative relay K21 to control the on / off state of the main negative relay K21. The second voltage sampling interface 3125 is used to output the potential information of the third electrical connector 3121 and the second electrical connector 3112.

[0269] The second voltage sampling interface 3125 is used to output the potential information in the circuit of the negative module 312, thereby detecting the potential information in the circuit of the negative module 312. A second conductive element 3127 is electrically connected between the sixth fuse B21 and the main negative relay K21. A fourth sampling point U00 is formed by the third electrical connector 3121, and a fifth sampling point U01 is formed by the fourth electrical connector 3122. The second voltage sampling interface 3125 is electrically connected to the fourth sampling point U00 and the fifth sampling point U01 to collect the potential information of the fourth sampling point U00 and the fifth sampling point U01, thereby detecting the operating status of the power distribution device 300. The second conductive element 3127 can be a copper busbar, wire, or other components.

[0270] The second control interface 3126 is used to connect electrically to the control circuit, and to control the on / off state of the main negative relay K21 by inputting an electrical signal through the control circuit.

[0271] The second control interface 3126 is electrically connected to the control terminal of the main negative relay K21 (i.e., the terminal in the main negative relay K21 that is electrically connected to the coil), so as to control the on / off state of the main negative relay K21 by means of the electrical signal input through the second control interface 3126.

[0272] By adopting the technical solution of this embodiment, the second voltage sampling interface 3125 and the second control interface 3126 are disposed in the eighth housing 3124. In this way, different models of the sixth fuse B21 and the main negative relay K21 can be installed in the eighth housing 3124, thereby changing the functional characteristics of the power distribution device 300 to meet different needs. However, the second voltage sampling interface 3125 and the second control interface 3126 can be reused without repeated configuration.

[0273] In some embodiments, the seventh housing 3114 includes a first housing body 31141, a first cover 31142, and a second cover 31143. A fifth fuse B11 and a main positive relay K11 are mounted on the first housing body 31141. The first cover 31142 covers one side of the first housing body 31141 to shield the fifth fuse B11 and the main positive relay K11. The second cover 31143 covers the other side of the first housing body 31141. Parts of the first electrical connector 3111 and the second electrical connector 3112 protrude from the seventh housing 3114 and are located on the same side of the seventh housing 3114 as the second cover 31143. A first voltage sampling interface 3115 and a first control interface 3116 are located on the second cover 31143. This arrangement facilitates wiring. The structure of the eighth housing 3124 may be the same as or different from that of the seventh housing 3114.

[0274] In some embodiments, the circuit between the first switch K31 and the positive terminal of the first charging interface 111 is provided with a sixth sampling point U4, the circuit between the third switch K41 and the positive terminal of the first discharging interface 112 is provided with a seventh sampling point U5, the circuit between the fifth switch K2 and the positive terminal of the second battery cell assembly M1 is provided with an eighth sampling point U7, and the circuit between the seventh switch K1 and the fourth fuse B1 is provided with a ninth sampling point U6. In this way, potential detection can be performed at multiple positions of the positive circuit between the battery cell assembly 100 and the first charging interface 111 and the first discharging interface 112, thereby detecting the operation of the positive circuit.

[0275] In some embodiments, the circuit between the second switch K32 and the negative terminal of the first charging interface 111 is provided with a tenth sampling point U02, and the circuit between the fourth switch K42 and the negative terminal of the first discharging interface 112 is provided with an eleventh sampling point U03. This allows for potential detection at multiple locations in the negative terminal circuit between the battery cell assembly 100 and the first charging interface 111 and the first discharging interface 112, thereby detecting the operating status of the negative terminal circuit. Combined with the aforementioned potential detection of the positive terminal circuit, the voltage distribution within the power distribution device 300 can be detected, facilitating the monitoring of the operation of the power distribution device 300.

[0276] In some embodiments, a third current detection element CS3 is provided between the positive electrode of the first battery cell assembly M2 and the first electrical connector 3111. The third current detection element CS3 is used to detect the current information output by the first battery cell assembly M2 so as to monitor the operation of the battery cell assembly 100.

[0277] In some embodiments, the battery device 1100 includes the aforementioned power distribution device 300.

[0278] By adopting the technical solution of this embodiment, the power distribution device 300 has good compatibility, which helps to reduce the manufacturing cost of the battery device 1100.

[0279] In some embodiments, the electrical device includes the battery device 1100 described above.

[0280] By adopting the technical solution of this embodiment, the manufacturing cost of the battery device 1100 is low, which helps to reduce the manufacturing cost of the power-consuming device.

[0281] See Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, the power distribution device 300 is used for the battery device 1100. The power distribution device 300 includes a device body 310 and an optional module 320. The device body 310 includes a seventh housing 3114, an eighth housing 3124, a first electrical connector 3111, a second electrical connector 3112, a third electrical connector 3121, a fourth electrical connector 3122, a first switching device 3113, and a second switching device 3123. The seventh housing 3114 and the eighth housing 3124 are separate structures. The first electrical connector 3111, the second electrical connector 3112, and the first switching device 3113 are disposed in the seventh housing 3114, and the third electrical connector 3121, the fourth electrical connector 3122, and the second switching device 3123 are disposed in the eighth housing 3124. The first switching device 3113 includes a fifth fuse B11 and a main positive relay K11 disposed in the seventh housing 3114. The fifth fuse B11 and the main positive relay K11 are connected in series between the first electrical connector 3111 and the second electrical connector 3112. The second switching device 3123 includes a sixth fuse B21 and a main negative relay K21 disposed in the eighth housing 3124. The sixth fuse B21 and the main negative relay K21 are connected in series between the third electrical connector 3121 and the fourth electrical connector 3122.

[0282] The optional module 320 includes a first on / off module 321, a second on / off module 322, a first fuse protection module 323, and a second fuse protection module 324; the battery device 1100 has a first charging interface 111, a second charging interface 113, a first discharging interface 112, and a second discharging interface 114. The first charging interface 111 is a DC charging interface, and the second charging interface 113 is an AC charging interface. The first discharging interface 112 is used for electrical connection with the drive components of the wheels of the vehicle 1000, and the second discharging interface 114 is used for electrical connection with the on-board converter.

[0283] The first on / off module 321 includes a first housing 3211, a first switch K31 and a second switch K32. The first switch K31 and the second switch K32 are located inside the first housing 3211. The first switch K31 is connected in series between the second electrical connector 3112 and the positive terminal of the first charging interface 111, and the second switch K32 is connected in series between the fourth electrical connector 3122 and the negative terminal of the first charging interface 111.

[0284] The second switching module 322 includes a second housing 3221 and a third switch K41 and a fourth switch K42 disposed within the second housing 3221. The third switch K41 and the fourth switch K42 are located within the second housing 3221. The third switch K41 is connected in series between the positive terminal of the second electrical connector 3112 and the first discharge interface 112, and the fourth switch K42 is connected in series between the fourth electrical connector 3122 and the negative terminal of the first discharge interface 112.

[0285] The first fuse protection module 323 includes a third housing 3231 and a first fuse B4 and a first current detection element CS2 disposed in the third housing 3231. The first fuse B4 is connected in series between the positive terminal of the second electrical connector 3112 and the second charging interface 113, and the first current detection element CS2 is connected in series between the fourth electrical connector 3122 and the negative terminal of the second charging interface 113.

[0286] The second fuse protection module 324 includes a fourth housing 3241 and a second fuse B3 and a second current detection element CS1 disposed in the fourth housing 3241. The second fuse B3 is connected in series between the positive terminal of the second electrical connector 3112 and the second discharge interface 114, and the second current detection element CS1 is connected in series between the negative terminal of the fourth electrical connector 3122 and the second discharge interface 114.

[0287] The battery unit 1100 includes a first battery unit assembly 100 and a second battery unit assembly M1; the power distribution unit 300 further includes a switching mechanism 330, which includes a fifth switch K2, a first switch module 331, and a second switch module 332. The positive terminal of the first battery unit assembly M2 is electrically connected to a first electrical connector 3111, and the negative terminal of the second battery unit assembly M1 is electrically connected to a third electrical connector 3121. The fifth switch K2 is connected in series between the negative terminal of the first battery unit assembly M2 and the positive terminal of the second battery unit assembly M1. The first switch module 331 includes a fifth switch K2, a first switch module 331, and a second switch module 332. The fifth housing 3311 includes a sixth switch K3 and a third fuse B2 disposed within the fifth housing 3311. The sixth switch K3 and the third fuse B2 are connected in series between the negative terminal of the first battery cell assembly M2 and the third electrical connector 3121 and in parallel with respect to the second battery cell assembly M1. The second switch module 332 includes a sixth housing 3321 and a seventh switch K1 and a fourth fuse B1 disposed within the sixth housing 3321. The seventh switch K1 and the fourth fuse B1 are connected in series between the positive terminal of the second battery cell assembly M1 and the first electrical connector 3111 and in parallel with respect to the first battery cell assembly M2.

[0288] The power distribution unit 300 also includes a filter 340, which is electrically connected between the optional module 320 and the first electrical connector 3111 and the fourth electrical connector 3122.

[0289] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0290] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A power distribution device for a battery device, comprising: The power distribution device includes a main body and optional modules; The main body of the device includes a base and a first electrical connector, a second electrical connector, a third electrical connector, a fourth electrical connector, a first switching device, and a second switching device disposed on the base. The first switching device is electrically connected between the first electrical connector and the second electrical connector, and the first electrical connector is used to electrically connect to the positive electrode of the battery cell assembly of the battery device. The second switching device is electrically connected between the third electrical connector and the fourth electrical connector, and the third electrical connector is used to electrically connect to the negative electrode of the battery cell assembly of the battery device. The optional module includes at least one of a first on / off module and a second on / off module; The first switching module and the main body of the device are separate structures. The first switching module is used to electrically connect the first charging interface of the battery device to the second electrical connector and the fourth electrical connector to control the circuit connection between the first charging interface and the main body of the device. The second switching module is a separate structure from the main body of the device. The second switching module is used to electrically connect the first discharge interface of the battery device to the second electrical connector and the fourth electrical connector to control the circuit connection between the first discharge interface and the main body of the device.

2. The power distribution device according to claim 1, characterized in that: The first on / off module includes a first housing, a first switch, and a second switch. The first switch and the second switch are located inside the first housing. The first switch is connected in series between the second electrical connector and the positive terminal of the first charging interface, and the second switch is connected in series between the fourth electrical connector and the negative terminal of the first charging interface.

3. The power distribution device of claim 1, wherein: The second switching module includes a second housing and a third switch and a fourth switch disposed within the second housing. The third switch and the fourth switch are located within the second housing. The third switch is connected in series between the second electrical connector and the positive terminal of the first discharge interface, and the fourth switch is connected in series between the fourth electrical connector and the negative terminal of the first discharge interface.

4. The power distribution device of any one of claims 1-3, wherein: The optional module also includes a first fuse protection module, which is a separate structure from the main body of the device. The first fuse protection module is used to electrically connect the second charging interface of the battery device to the second electrical connector and the fourth electrical connector. The first charging interface is a DC charging interface and the second charging interface is an AC charging interface.

5. The power distribution device of claim 4, wherein: The first fuse protection module includes a third housing and a first fuse and a first current detection device disposed within the third housing. The first fuse is connected in series between the second electrical connector and the positive terminal of the second charging interface, and the first current detection device is connected in series between the fourth electrical connector and the negative terminal of the second charging interface.

6. The power distribution device of any one of claims 1-3, wherein: The optional module also includes a second fuse protection module, which is a separate structure from the main body of the device. The second fuse protection module is used to electrically connect the second discharge interface of the battery device to the second electrical connector and the fourth electrical connector. The first discharge interface is used to electrically connect to the drive components of the vehicle's wheels, and the second discharge interface is used to electrically connect to the on-board converter.

7. The power distribution device of claim 6, wherein: The second fuse protection module includes a fourth housing and a second fuse and a second current detection device disposed within the fourth housing. The second fuse is connected in series between the positive terminal of the second electrical connector and the second discharge interface, and the second current detection device is connected in series between the fourth electrical connector and the negative terminal of the second discharge interface.

8. The power distribution device of any one of claims 1-3, wherein: The battery cell assembly includes a first battery cell assembly and a second battery cell assembly. The power distribution device also includes a conversion mechanism, which is a separate structure from the main body of the device. The first battery cell assembly and the second battery cell assembly are electrically connected to the first electrical connector and the third electrical connector through the conversion mechanism. The conversion mechanism can convert the first battery cell assembly and the second battery cell assembly in series and parallel.

9. The power distribution device of claim 8, wherein: The switching mechanism includes a fifth switch, a first switch module, and a second switch module. The positive terminal of the first battery cell assembly is electrically connected to the first electrical connector, and the negative terminal of the second battery cell assembly is electrically connected to the third electrical connector. The fifth switch is connected in series between the negative terminal of the first battery cell assembly and the positive terminal of the second battery cell assembly. One end of the first switch module is electrically connected between the fifth switch and the negative terminal of the first battery cell assembly, and the other end of the first switch module is electrically connected to the fourth electrical connector. One end of the second switch module is electrically connected between the fifth switch and the positive terminal of the second battery cell assembly, and the other end of the second switch module is electrically connected to the first electrical connector.

10. The power distribution device of claim 9, wherein: The first switch module and the second switch module are separate structures.

11. The power distribution device of claim 10, wherein: The first switch module includes a fifth housing and a sixth switch and a third fuse disposed within the fifth housing. The sixth switch and the third fuse are connected in series between the negative terminal of the first battery cell assembly and the third electrical connector. The second switch module includes a sixth housing and a seventh switch and a fourth fuse disposed within the sixth housing. The seventh switch and the fourth fuse are connected in series between the positive terminal of the second battery cell assembly and the first electrical connector.

12. The power distribution device of any one of claims 1-3, wherein: The power distribution device also includes a filter, which is electrically connected between the optional module and the first electrical connector and the fourth electrical connector.

13. The power distribution device of any one of claims 1-3, wherein: The substrate includes a seventh housing and an eighth housing that are separately configured. The first electrical connector, the second electrical connector and the first switching device are disposed in the seventh housing, and the third electrical connector, the fourth electrical connector and the second switching device are disposed in the eighth housing.

14. The power distribution device of claim 13, wherein: The first switching device includes a fifth fuse and a main positive relay disposed in the seventh housing, and the fifth fuse and the main positive relay are connected in series between the first electrical connector and the second electrical connector.

15. The power distribution device according to claim 14, characterized in that: The seventh housing is provided with a first voltage sampling interface and a first control interface. The first control interface is electrically connected to the main positive relay to control the on / off state of the main positive relay. The first voltage sampling interface is used to output the potential information between the first electrical connector, the second electrical connector, the fifth fuse, and the main positive relay.

16. The power distribution device of claim 13, wherein: The second switching device includes a sixth fuse and a main negative relay disposed within the eighth housing, wherein the sixth fuse and the main negative relay are connected in series between the third electrical connector and the fourth electrical connector.

17. The power distribution device of claim 16, wherein: The eighth housing is provided with a second voltage sampling interface and a second control interface. The second control interface is electrically connected to the main negative relay to control the on / off state of the main negative relay. The second voltage sampling interface is used to output the potential information of the third electrical connector and the second electrical connector.

18. A battery device, characterized by: Includes the power distribution device described in any one of claims 1 to 17.

19. An electrical device, comprising: Includes the battery device as described in claim 18.

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