Battery device, electrical box, and electric device

Abstract

The present application relates to the technical field of batteries, and discloses a battery device, an electrical box, and an electric device. The battery device comprises the electrical box and battery cells, wherein the electrical box is electrically connected to the battery cells. The electrical box comprises a mounting housing, a battery management module, a power distribution module, and a first electrical connection assembly. The mounting housing comprises an insulating cover and a main housing, wherein the insulating cover covers the main housing to form an accommodating space; the power distribution module is disposed within the accommodating space on the inner side of the insulating cover; the battery management module is disposed on the outer side of the insulating cover; and a portion of the structure of the first electrical connection assembly is embedded in the insulating cover, and the first electrical connection assembly has portions respectively protruding from the inner side and the outer side of the insulating cover, so that the first electrical connection assembly is connected to the power distribution module and the battery management module. The technical solution of the present application can solve the problem that the battery management module and the power distribution module in the battery device occupy a large space.

Description

Battery devices, electrical boxes, and electrical appliances Technical Field

[0001] This application relates to the field of batteries, and in particular to a battery device, an electrical box, and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, the battery device, as a core component, is a crucial factor in their development.

[0003] Currently, the battery management module and power distribution module in battery devices are relatively large, and they require wiring harnesses for connection, which takes up a lot of space.

[0004] Application content

[0005] The main purpose of this application is to propose a battery device, an electrical box, and a power supply device, which aims to solve the problem of the large space occupied by the battery management module and the power distribution module in the battery device.

[0006] To achieve the above objectives, the battery device proposed in this application includes an electrical box and a battery cell, wherein the electrical box is electrically connected to the battery cell, and the electrical box includes:

[0007] The mounting housing includes an insulating cover and a main housing, wherein the insulating cover covers the main housing to form an accommodating space;

[0008] A power distribution module, wherein the power distribution module is disposed in the receiving space inside the insulating cover;

[0009] A battery management module, wherein the battery management module is disposed on the outside of the insulating cover; and

[0010] A first electrical connection component is partially embedded in the insulating cover, and a portion of the first electrical connection component protrudes from the inner and outer sides of the insulating cover, so that the first electrical connection component connects the power distribution module and the battery management module.

[0011] In this application's technical solution, both the battery management module and the power distribution module of the battery device are mounted on the mounting housing, and the battery management module and the power distribution module are electrically connected through a first electrical connection component embedded in the insulating cover. This arrangement integrates the battery management module and the power distribution module into an electrical box, facilitating easy assembly and disassembly. Furthermore, the battery management module and the power distribution module do not require wiring harness connections, and the overall structure of the electrical box is compact, resulting in a relatively small overall volume and minimal space occupation within the battery device. This smaller space occupation is beneficial for increasing the battery capacity within the battery device.

[0012] In one embodiment, the battery management module includes a circuit board, which includes a master control area and a slave control area. The master control area is electrically connected to the slave control area through a built-in circuit of the circuit board. Multiple battery cells are connected to the same sampling component, which is connected to the slave control area.

[0013] This configuration integrates the main control circuit and slave control circuit of the battery management module onto the circuit board, reducing the number of components and saving on wiring harnesses between the main and slave control units. The overall structure is compact, reducing the size of the battery management module and electrical box, and facilitating easy assembly and disassembly. Furthermore, multiple battery cells are electrically connected to the slave control circuit in the slave control area via sampling components. This allows voltage and temperature signals from the battery cells to be transmitted to the battery management module, enabling effective transmission and acquisition of these signals. Based on the sampled signals, thermal management and / or safety management of the battery cells can then be performed.

[0014] In one embodiment, the circuit board includes a first connector, the sampling component includes a board body and a second connector, the board body is provided with sampling lines, the sampling lines connect the battery cell and the second connector, and the first connector and the second connector are plugged into each other.

[0015] This configuration allows for easy connection and disconnection of the battery management module and sampling component simply by plugging and unplugging the first and second connectors. Furthermore, it eliminates the need for a wiring harness between the sampling component and the battery management module, saving wiring space and improving the space utilization of the battery device.

[0016] In one embodiment, the circuit board includes a first soldering portion, and the sampling assembly includes a board body and a second soldering portion disposed on the board body. The board body is provided with a sampling line, which connects the battery cell and the second soldering portion. The first soldering portion and the second soldering portion are soldered together to connect the circuit board and the sampling assembly.

[0017] Using the above method, the connection strength between the sampling component and the battery management module is high, ensuring a stable electrical connection between them and guaranteeing stable performance.

[0018] In one embodiment, the electrical box further includes a low-voltage connector that is directly connected to the battery management module.

[0019] This configuration eliminates the need for a wiring harness between the low-voltage connector and the battery management module, improving the connection stability between them. It also reduces the risk of malfunctions in the low-voltage control function due to wear and damage to the wiring harness, and reduces the space required for wiring harness installation, resulting in a more compact structure, improved space utilization, and a smaller electrical box size.

[0020] In one embodiment, the low-voltage connector includes a connection terminal, the battery management module includes a main control unit, the main control unit has a socket, and the connection terminal is inserted into the socket to connect with the main control unit.

[0021] Using the above method, the connection between the low-voltage connector and the battery management module is relatively convenient.

[0022] In one embodiment, the low-voltage connector is welded to the main control unit; and / or, a support rod is connected between the low-voltage connector and the battery management module.

[0023] By adopting the above method, the connection between the low-voltage connector and the battery management module is made more stable, ensuring the stable performance of the low-voltage control function.

[0024] In one embodiment, the mounting housing further includes a second electrical connection assembly, a portion of which is embedded in the main housing, and at least some of the electrical components of the power distribution module are electrically connected through the second electrical connection assembly.

[0025] This configuration eliminates the need for wiring harnesses between electrical components in the power distribution module, reducing the size of the electrical box and facilitating electrical connections between components. Furthermore, embedding the second electrical connection component within the main housing, integrating it into a single structure, reduces assembly steps and improves overall structural stability.

[0026] In one embodiment, the electrical components of the power distribution module include a main positive relay, a main negative relay, and a high-voltage connector, wherein the main positive relay, the high-voltage connector, and the main negative relay are connected in series via the second electrical connection component;

[0027] The main positive relay and the main negative relay are respectively electrically connected to the battery management module through the first electrical connection component.

[0028] This configuration saves on the relay control wiring harness between the battery management module and the power distribution module, saving wiring space, improving the space utilization of the battery device, and reducing the risk of unstable relay control function due to easy wear and damage of the wiring harness.

[0029] In one embodiment, the second electrical connection assembly includes a first conductive element and a second conductive element, and the first electrical connection assembly further includes a first connecting tab and a second connecting tab;

[0030] The main positive relay and the high voltage connector are electrically connected through the first conductive element, and the two ends of the first connecting plate are respectively connected to the first conductive element and the battery management module;

[0031] The main negative relay and the high voltage connector are electrically connected through a second conductive element, and the two ends of the second connecting plate are respectively electrically connected to the second conductive element and the battery management module.

[0032] This configuration allows for sampling and monitoring of high-voltage voltage at different locations within the power distribution module via the first electrical connection component. This enables monitoring of the voltage information of the high-voltage circuits controlled by the main positive relay and the main negative relay, allowing for appropriate control and protection operations as needed. This ensures the normal operation of the electrical box and battery device, guaranteeing their performance and lifespan.

[0033] In one embodiment, the power distribution module further includes a fuse, and the second electrical connection assembly further includes a third conductive element. The fuse is electrically connected to the positive voltage terminal of the main positive relay through the third conductive element. The first electrical connection assembly further includes a third connecting bar, and the two ends of the third connecting bar are respectively connected to the third conductive element and the battery management module.

[0034] This setup, with fuses installed in the power distribution module, can prevent overcurrent and short circuits from damaging the battery and equipment; at the same time, using a third connection bar to sample the fuse input voltage enables better safety management.

[0035] In one embodiment, the power distribution module further includes a pre-charge circuit unit connected in parallel with the main positive relay. The pre-charge circuit unit includes a pre-charge relay and a pre-charge resistor connected in series via a third electrical connection component. The positive voltage terminal of the pre-charge circuit unit is connected to the third connection bar, and the negative voltage terminal of the pre-charge circuit unit is connected to the first connection bar.

[0036] In this configuration, the power distribution module integrates a pre-charge function, thereby optimizing the performance of the electrical box. Furthermore, the pre-charge circuit unit can be directly connected to the third and first connection bars to establish an electrical connection and perform signal sampling on the pre-charge circuit unit. Moreover, the pre-charge relay and pre-charge resistor do not require wiring harness connection, simplifying the electrical connection structure of the power distribution module, improving connection convenience and stability, and also facilitating the integration and miniaturization of the power distribution module and electrical box.

[0037] In one embodiment, the first connecting bar branch is provided with a first branch bar connected to the negative pressure end of the pre-charge circuit unit;

[0038] And / or, the third connecting bar branch is provided with a second branch bar connected to the positive pressure end of the precharge circuit unit.

[0039] By adopting the above method, the connection area of ​​the third connecting bar and the first connecting bar can be increased. Alternatively, the design can be tailored to the location of electrical components in the power distribution module, extending the second branch bar and the first branch bar to a location that facilitates connection to the pre-charge circuit unit, thereby improving connection convenience and design flexibility.

[0040] In one embodiment, a portion of the structure of the third electrical connection assembly is embedded in the insulating cover.

[0041] By using the above method, the third electrical connection component is embedded in the insulating cover, eliminating the need for additional fixing of the third electrical connection component. The overall structure is stable and compact, ensuring a stable connection between the pre-charge relay and the pre-charge resistor, which is beneficial for the integration and miniaturization of the electrical box.

[0042] In one embodiment, the power distribution module includes a fast charging circuit unit, which includes a fast charging connector and a fast charging relay connected in series via a fourth conductive element, and a portion of the structure of the fourth conductive element is embedded in the main housing.

[0043] The first electrical connection assembly further includes a fourth connection bar, the two ends of which are respectively connected to the fourth conductive element and the battery management module.

[0044] This setup allows for the selection of fast-charging connectors to charge individual battery cells as needed, enriching the functionality of the electrical box; the fourth connector samples the fast-charging circuit unit, ensuring stable fast-charging functionality.

[0045] In one embodiment, the first electrical connection component is directly soldered to the battery management module; this arrangement provides a high connection strength between the first electrical connection component and the battery management module, ensuring a stable electrical connection and guaranteeing the stable performance of the electrical box.

[0046] In one embodiment, the first electrical connection component and the insulating cover are integrally injection molded. This arrangement facilitates the integration of the first electrical connection component and the insulating cover, and also provides high structural stability.

[0047] In one embodiment, the first electrical connection component is electrically connected to the power distribution module via fasteners.

[0048] Using the above method, the connection and disassembly between the first electrical connection component and the power distribution module are convenient, and it can also have good connection strength and stability, ensuring the stable performance of the electrical box.

[0049] In one embodiment, the mounting housing further includes a top cover that covers the insulating cover on the side opposite to the main housing, and the battery management module is disposed between the top cover and the insulating cover.

[0050] This design utilizes the top cover and insulating cover to provide good protection for the battery management module, reducing the risk of damage to the module.

[0051] In one embodiment, the battery device further includes a lower housing having an installation space, and a first sidewall of the lower housing having a clearance opening; the battery cell and the electrical box are both disposed in the installation space, the installation housing having a locking structure that locks to the sidewall of the lower housing, and at least a portion of the structure of at least one of the low-voltage connector, high-voltage connector, or other connectors of the electrical box protrudes from the first sidewall toward the installation space toward the sidewall away from the installation space through the clearance opening.

[0052] This design facilitates the connection of connectors such as low-voltage connectors, high-voltage connectors, and fast-charging connectors to external devices, improving ease of use.

[0053] In one embodiment, the mounting housing is provided with a locking structure that is locked to the first sidewall.

[0054] In this configuration, the locking force on the locking structure is directed towards the side of the electrical box when it is fixed. This prevents the electrical box from being subjected to pressure on the bottom wall of the housing space, which could cause the connector to shift. This ensures the positional accuracy of the connector and avoids problems such as poor electrical connection due to connector shift. It increases connector reliability, reduces problems such as burning and improper installation, and ensures stable performance.

[0055] The present invention also proposes an electrical box, comprising:

[0056] The mounting housing includes an insulating cover and a main housing, wherein the insulating cover covers the main housing to form an accommodating space;

[0057] A power distribution module, wherein the power distribution module is disposed in the receiving space inside the insulating cover;

[0058] A battery management module, wherein the battery management module is disposed on the outside of the insulating cover; and

[0059] A first electrical connection component is partially embedded in the insulating cover, and a portion of the first electrical connection component protrudes from the inner and outer sides of the insulating cover, so that the first electrical connection component connects the power distribution module and the battery management module.

[0060] This configuration integrates the battery management module and the power distribution module into an electrical box, which is easy to install and remove. The battery management module and the power distribution module do not need to be connected by a wiring harness. The overall structure of the electrical box is compact, making the overall size of the integrated electrical box relatively small and occupying less space in the battery device. This smaller space occupation in the battery device is beneficial for increasing the battery capacity.

[0061] In one embodiment, the battery management module includes a circuit board, which includes a master control area and a slave control area. The master control area is electrically connected to the slave control area through a built-in circuit of the circuit board. Multiple battery cells are connected to the same sampling component, which is connected to the slave control area.

[0062] This configuration integrates the main control circuit and slave control circuit of the battery management module onto the circuit board, reducing the number of components and saving on wiring harnesses between the main and slave control units. The overall structure is compact, reducing the size of the battery management module and electrical box, and facilitating easy assembly and disassembly. Furthermore, multiple battery cells are electrically connected to the slave control circuit in the slave control area via sampling components, allowing voltage and temperature signals from the battery cells to be transmitted to the battery management module. This enables effective transmission and acquisition of these signals, allowing the battery management module to perform thermal management and / or safety management of the battery cells.

[0063] In one embodiment, the circuit board includes a first connector, the sampling component includes a board body and a second connector, the board body is provided with sampling lines, the sampling lines connect the battery cell and the second connector, and the first connector and the second connector are plugged into each other.

[0064] This configuration allows for easy connection and disconnection of the battery management module and sampling component simply by plugging and unplugging the first and second connectors. Furthermore, it eliminates the need for a wiring harness between the sampling component and the battery management module, saving wiring space and improving the space utilization of the battery device.

[0065] In one embodiment, the circuit board includes a first soldering portion, and the sampling assembly includes a board body and a second soldering portion disposed on the board body. The board body is provided with a sampling line, which connects the battery cell and the second soldering portion. The first soldering portion and the second soldering portion are soldered together to connect the circuit board and the sampling assembly.

[0066] Using the above method, the connection strength between the sampling component and the battery management module is high, ensuring a stable electrical connection between them and guaranteeing stable performance.

[0067] In one embodiment, the electrical box further includes a low-voltage connector that is directly connected to the battery management module.

[0068] This configuration eliminates the need for a wiring harness between the low-voltage connector and the battery management module, improving the connection stability between them. It also reduces the risk of malfunctions in the low-voltage control function due to wear and damage to the wiring harness, and reduces the space required for wiring harness installation, resulting in a more compact structure, improved space utilization, and a smaller electrical box size.

[0069] In one embodiment, the mounting housing further includes a second electrical connection assembly, a portion of which is embedded in the main housing, and at least some of the electrical components of the power distribution module are electrically connected through the second electrical connection assembly.

[0070] This configuration eliminates the need for wiring harnesses between electrical components in the power distribution module, reducing the size of the electrical box and facilitating electrical connections between components. Furthermore, embedding the second electrical connection component within the main housing, integrating it into a single structure, reduces assembly steps and improves overall structural stability.

[0071] The present invention also proposes an electrical device, which includes the battery device provided in any of the foregoing embodiments, the battery device being used to provide electrical energy.

[0072] By using the battery device provided in the aforementioned embodiments in the electrical device, it is beneficial to increase the battery capacity of the battery device in the electrical device and improve the performance of the electrical device.

[0073] 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 other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0074] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 the structures shown in these drawings without creative effort.

[0075] Figure 1 is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0076] Figure 2 is a structural diagram of a battery device according to some embodiments of this application;

[0077] Figure 3 is a structural diagram of the electrical box in a battery device according to some embodiments of this application;

[0078] Figure 4 is a structural diagram of the electrical box in Figure 3 from another perspective;

[0079] Figure 5 is an exploded view of the electrical box in Figure 3;

[0080] Figure 6 is a structural diagram of the electrical box with the top cover removed in Figure 3;

[0081] Figure 7 is a structural diagram of the electrical box in Figure 6 with the main housing and insulating cover removed;

[0082] Figure 8 is a structural diagram of Figure 7 after the battery management module has been removed;

[0083] Figure 9 is a structural diagram of the insulating cover and the first electrical connection assembly of the electrical box in Figure 3;

[0084] Figure 10 is a structural diagram from another perspective of Figure 9;

[0085] Figure 11 is a structural diagram of the main housing and the second electrical connection assembly of the electrical box in Figure 3.

[0086] Reference numerals: 1000, Vehicle; 100, Battery Unit; 10, Electrical Box; 1, Mounting Housing; 11, Insulating Cover; 12, First Electrical Connection Assembly; 121, First Connecting Bar; 1211, First Branch Bar; 122, Second Connecting Bar; 123, Third Connecting Bar; 1231, Second Branch Bar; 124, Fourth Connecting Bar; 125, Fifth Connecting Bar; 13, Main Housing; 14, Second Electrical Connection Assembly; 141, First Conductive Component; 142, Second Conductive Component; 143, Third Conductive Component; 144, Fourth Conductive Component; 15, Third Electrical Connection Assembly; 16, Fastener; 17, Top Cover; 18, Locking Structure; 2, Battery Management Module; 21, Circuit Board; 211, Main Control Area; 212, Slave Control Area; 213, First Connector; 3. Power distribution module; 31. Fuse; 32. Main positive relay; 33. Main negative relay; 34. High voltage connector; 35. Fast charging circuit unit; 351. Fast charging connector; 352. Fast charging relay; 36. Pre-charge circuit unit; 361. Pre-charge relay; 362. Pre-charge resistor; 37. Shunt; 4. Low voltage connector; 41. Support rod; 42. Connection terminal; 20. Battery cell; 30. Sampling assembly; 40. Lower shell; 401. First side wall; X, first direction; Y, second direction; 200. Controller; 300. Motor.

[0087] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0088] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0089] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0090] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0091] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0092] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0093] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0094] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0095] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0096] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0097] In related technologies, battery devices are equipped with individual battery cells, a power distribution module, a sampling component, and a battery management module. The power distribution module is used for the connection, distribution, protection, and control between the battery device and electrical equipment, performing power distribution management to allocate electrical energy to the power system and control the energy flow to various components. The battery management module is a system for monitoring and managing the battery device. It connects to the individual battery cells through the sampling component, which can collect temperature and voltage information of each battery cell. The battery management module also performs high and low voltage sampling on the power distribution module. By collecting and calculating parameters such as voltage, current, temperature, and SOC of the battery cells and the power distribution module, it controls the charging and discharging process of the battery device.

[0098] Currently, the battery management module in battery devices uses wiring harnesses to sample high and low voltages from individual battery cells and power distribution modules. However, these wiring harnesses are prone to wear and damage, resulting in a high failure rate and large space occupation, making the assembly and production of battery devices cumbersome.

[0099] Based on the above considerations, this application proposes a battery device, which includes an electrical box and battery cells. The electrical box is electrically connected to the battery cells. The electrical box includes a mounting shell, a power distribution module, a battery management module, and a first electrical connection component. The mounting shell includes an insulating cover and a main shell. The insulating cover closes onto the main shell to form an accommodating space. The power distribution module is located in the accommodating space inside the insulating cover. The battery management module is located on the outside of the insulating cover. A portion of the structure of the first electrical connection component is embedded in the insulating cover, and a portion of the structure of the first electrical connection component protrudes from the inside and outside of the insulating cover, so that the first electrical connection component connects the power distribution module and the battery management module.

[0100] This configuration integrates both the battery management module and the power distribution module within the battery pack onto the mounting housing, facilitating easy assembly and disassembly. The battery management module and power distribution module are electrically connected via a first electrical connection component embedded in the insulating cover, eliminating the need for wiring harnesses. This addresses the high structural failure rate in battery packs, while also ensuring a compact overall structure and relatively small size of the electrical box, minimizing its space requirements and thus increasing battery capacity.

[0101] A battery device, serving as a power source or power system for an electrical device, is a single physical module comprising one or more battery cells, capable of providing higher voltage and capacity. A battery device may include a lower casing, an upper casing, and battery cells, with the upper casing connected to the lower casing. The battery cells are housed within the cavity formed by the connection between the upper and lower casings. One or more battery cells can be combined in series, parallel, or series-parallel configurations to form a battery module, which has only one pair of positive and negative output terminals. A battery cell is the smallest unit for storing and outputting electrical energy. A battery cell can be a secondary or primary battery. Battery cells can be, but are not limited to, metal batteries, lithium-sulfur batteries, sodium-ion batteries, or magnesium-ion batteries. Battery cells can be cylindrical, flat, cuboid, or other shapes.

[0102] In this application embodiment, an electrical device refers to a device that uses a battery to provide electrical energy, and may include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0103] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0104] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery is installed inside the vehicle 1000, and the battery can be located at the bottom, front, or rear of the vehicle 1000. The battery can be used to power the vehicle 1000; for example, the battery can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0105] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0106] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within a battery box. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery cell assembly, and then these battery cell assemblies are connected in series, parallel, or in a mixed manner to form a whole, which is then housed within a battery box. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0107] The battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0108] According to some embodiments of this application, and referring to Figures 2 to 4 and Figure 9, in one embodiment of this application, the battery device 100 includes an electrical box 10 and a battery cell 20. The electrical box 10 is electrically connected to the battery cell 20. The electrical box 10 includes a mounting shell 1, a battery management module 2, a power distribution module 3, and a first electrical connection component 12. The mounting shell 1 includes a main shell 13 and an insulating cover 11. The insulating cover 11 covers the main shell 13 to form a receiving space. The power distribution module 3 is disposed in the receiving space inside the insulating cover 11. The battery management module 2 is disposed on the outside of the insulating cover 11. A portion of the structure of the first electrical connection component 12 is embedded in the insulating cover 11. A portion of the structure of the first electrical connection component 12 protrudes from the inside and outside of the insulating cover 11, so that the first electrical connection component 12 connects the power distribution module 3 and the battery management module 2.

[0109] In this embodiment, the battery management module 2 and the power distribution module 3 are integrated into a single electrical box 10. The electrical box 10 is equipped with a mounting shell 1 as the basis for module installation. The mounting shell 1 can be configured to be formed by at least a main shell 13 and an insulating cover 11 covering each other. The main shell 13 and the insulating cover 11 enclose a receiving space. The main shell 13 and the insulating cover 11 can be fixedly connected by means of snap-fit ​​connection, bolt connection or adhesive.

[0110] Battery management module 2 and power distribution module 3 are respectively disposed on opposite sides of insulating cover 11; power distribution module 3 is disposed in the receiving space formed by main housing 13 and insulating cover 11, and battery management module 2 is disposed on the side of insulating cover 11 opposite to the receiving space; optionally, mounting housing 1 may also include upper cover 17 covering the outside of insulating cover 11, and at least part of the structure of battery management module 2 may be disposed between insulating cover 11 and upper cover 17. Power distribution module 3 is used for connection, distribution, protection and control between battery device 100 and electrical equipment, to perform power distribution management, distribute the power of the power system and control the power flow of each component. The battery management module 2 is a system for monitoring and managing the battery device 100. It is connected to the battery cells 20 through the sampling component 30, which can collect the temperature and voltage information of each battery cell 20. The battery management module 2 also performs high and low voltage sampling on the power distribution module 3. By collecting and calculating parameters such as voltage, current, temperature and SOC of the battery cells 20 and the power distribution module 3, it controls the charging and discharging process of the battery device 100.

[0111] The power distribution module 3 may include a main positive relay 32, a main negative relay 33, a fuse 31, a shunt 37, and connectors for cooperating with external devices. These components are electrically connected to form a high-voltage functional circuit. In this embodiment, a high-voltage circuit refers to a circuit with a voltage exceeding 60V, and a high-voltage connector 34 and other high-voltage components are parts capable of carrying current exceeding 60V (high-voltage current). Correspondingly, a low-voltage circuit refers to a circuit with a voltage not exceeding 60V, and a low-voltage connector 4 is a part capable of carrying current not exceeding 60V (low-voltage current). The battery management module 2 may be configured as a circuit board or other structural forms. Optionally, the battery management module 2 includes a master control unit and a slave control unit, which are electrically connected. The slave control unit can collect sampling information such as voltage and temperature from individual battery cells 20. The master control unit can receive sampling information such as voltage, current, and temperature collected by the slave control unit and sampling information such as voltage, current, and temperature collected from various sampling points in the power distribution module 3, thereby performing the main protection and battery management functions based on the sampling information.

[0112] The first electrical connection component 12 for connecting the battery management module 2 and the power distribution module 3 is embedded in the insulating cover 11. The first electrical connection component 12 can be configured as a conductive structure such as copper. Using the first electrical connection component 12 to construct the electrical connection between the battery management module 2 and the power distribution module 3 can reduce the amount of wiring harness required.

[0113] The insulating cover 11 and the first electrical connection assembly 12 can be integrally connected by injection molding, thereby achieving a better combination between the insulating cover 11 and the first electrical connection assembly 12, improving connection strength and overall structural stability, and making the position of the first electrical connection assembly 12 more stable and less prone to displacement. Furthermore, the first electrical connection assembly 12 is less susceptible to wear and damage from other components of the electrical box 10, which also improves the reliability and stability of the electrical connection. This reduces the risk of abnormalities in the high-voltage sampling function due to wiring harness wear and damage, ensuring the long-term effectiveness and reliability of the high-voltage sampling function, and extending the service life of the electrical box 10. Moreover, combining the insulating cover 11 and the first electrical connection assembly 12 results in a compact structural arrangement, improving space utilization and reducing the space occupied by the first electrical connection assembly 12.

[0114] In the technical solution of this application, both the battery management module 2 and the power distribution module 3 are mounted on the mounting housing 1, and are electrically connected via a first electrical connection component 12 embedded in the insulating cover 11. This arrangement integrates the battery management module 2 and the power distribution module 3 into an electrical box 10, facilitating easy assembly and disassembly. Furthermore, the battery management module 2 and the power distribution module 3 do not require wiring harness connections. The overall structure of the electrical box 10 is compact, resulting in a relatively small overall volume and minimal space occupation within the battery device 100, which is beneficial for increasing the battery capacity within the battery device 100.

[0115] Referring to Figures 5 and 6, in one embodiment, the battery management module 2 includes a circuit board 21, which includes a master control area 211 and a slave control area 212. The master control area 211 is electrically connected to the slave control area 212 through the built-in circuit of the circuit board 21. Multiple battery cells 20 are connected to the same sampling component 30, which is connected to the slave control area 212.

[0116] In this embodiment, the main control area 211 on the circuit board 21 is provided with a main control circuit and corresponding electronic components, serving as the main control unit of the battery management module 2; the slave control area 212 on the circuit board 21 is provided with a slave control circuit and corresponding electronic components, serving as the slave control unit of the battery management module 2. That is, the main control unit and the slave control unit are integrated on the circuit board 21, making the battery management module 2 integrated, reducing the number of components in the battery management module 2, and saving the wiring harness or other connectors between the main control unit and the slave control unit. This results in a compact overall structure, which helps to reduce the size of the battery management module 2 and the electrical box 10, and also makes the assembly and disassembly of the battery management module 2 more convenient.

[0117] The battery cell 20 in the battery device 100 is electrically connected to the slave control circuit of the slave control area 212 through the sampling component 30, so that the voltage signal and temperature signal of the battery cell 20 can be transmitted to the battery management module 2, so as to realize the effective transmission and acquisition of the voltage signal and temperature signal of the battery cell 20, and thus perform thermal management and / or safety management of the battery cell 20 based on the sampling signal.

[0118] In this configuration, multiple battery cells 20 are connected to the same sampling component 30, reducing the number of components in the battery device 100 and simplifying its structure. Optionally, all battery cells 20 in the battery device 100 can be connected to the same sampling component 30, or multiple sampling components 30 can be set, with each sampling component 30 connecting to a portion of the battery cells 20; this is not limited here.

[0119] Referring to Figures 2 and 6, in one embodiment, the circuit board 21 includes a first connector 213, and the sampling component 30 includes a board body and a second connector. The board body is provided with sampling lines, which connect the battery cell 20 and the second connector. The first connector 213 and the second connector are plugged into each other.

[0120] In this embodiment, the main body 32 of the sampling component 30 can be a rigid circuit board or a flexible circuit board. Sampling lines are provided in the main body 32, and these sampling lines are conductive layers located on or inside the main body 32, which can be formed of copper wire or other conductive materials. The first connector 213 and the second connector are male and female connectors that can be plugged into each other. The battery management module 2 and the sampling component 30 can be connected and disconnected by plugging and unplugging the first connector 213 and the second connector, making assembly and disassembly convenient. Furthermore, the adapter cable bundle between the sampling component 30 and the battery management module 2 can be eliminated, saving wiring space and improving the space utilization of the battery device 100.

[0121] In one embodiment, the circuit board 21 includes a first soldering part (not shown), the sampling component 30 includes a board body and a second soldering part (not shown) disposed on the board body, the board body is provided with sampling lines, the sampling lines connect the battery cell 20 and the second soldering part, and the first soldering part and the second soldering part are soldered to connect the circuit board 21 and the sampling component 30.

[0122] In this embodiment, one of the first welding part and the second welding part can be configured as a solder pad, and the other as a welding pin, with the welding pin soldered onto the solder pad; alternatively, one of the first welding part and the second welding part can be configured as a welding hole, and the other as a welding needle, with the welding needle inserted into the welding hole for welding. Using the above methods, the connection strength between the sampling component 30 and the battery management module 2 is high, maintaining a stable electrical connection between them and ensuring stable performance.

[0123] Please refer to Figure 6. The circuit board 21 is provided with at least two slave control areas 212, which are distributed on both sides of the master control area 2121. Each slave control area 212 can be used to connect at least one sampling component 30. This increases the sampling channel and improves the flexibility of system configuration, making it applicable to battery devices 100 with different battery capacities and specifications.

[0124] Referring to Figures 3 and 5, in one embodiment, the electrical box 10 further includes a low-voltage connector 4, which is directly connected to the battery management module 2.

[0125] In this embodiment, the battery management module 2 has a low-voltage control circuit, which is a circuit used to control and operate a high-voltage system. The low-voltage connector 4 is electrically connected to the low-voltage control loop, enabling the low-voltage control loop to perform low-voltage control on the connected object of the low-voltage connector 4. That is, the low-voltage control loop can communicate with the connected object of the low-voltage connector 4 through the low-voltage connector 4 and control and operate it.

[0126] The low-voltage connector 4 is directly connected to the battery management module 2. The low-voltage connector 4 and the battery management module 2 can be connected by at least one method such as plugging or soldering. This eliminates the need for a wire harness connection between the low-voltage connector 4 and the battery management module 2, which improves the connection stability between them, reduces the risk of abnormal low-voltage control function due to easy wear and damage of the wire harness, and also reduces the space required for wiring harness arrangement, making the structure more compact, improving space utilization, and reducing the volume of the electrical box 10.

[0127] Please refer to Figure 5. In one embodiment, the low-voltage connector 4 includes a connection terminal 42, and the battery management module 2 includes a main control unit. The main control unit has a socket (not shown), and the connection terminal 42 is inserted into the socket to connect with the main control unit.

[0128] Specifically, the low-voltage connector 4 is provided with a connection terminal 42, and the battery management module 2 includes a main control unit, so that the connection terminal 42 of the low-voltage connector 4 is inserted into the socket of the main control unit, thereby making an electrical connection between the low-voltage connector 4 and the battery management module 2.

[0129] Optionally, the battery management module 2 may include a separate master control unit and a slave control unit, which are electrically connected. The master control unit is connected to the low-voltage connector 4 and the first electrical connection assembly 12, and the slave control unit is used to electrically connect to the battery cell 20. The master control unit and the slave control unit can also be configured as an integrated structure. For example, as in the above embodiment, the battery management module 2 is configured as a circuit board 21. The master control area 211 on the circuit board 21 is provided with a master control circuit and corresponding electronic components, serving as the master control unit of the battery management module 2; the slave control area 212 on the circuit board 21 is provided with a slave control circuit and corresponding electronic components, serving as the slave control unit of the battery management module 2.

[0130] In one embodiment, the connection terminal 41 is soldered to the main control unit. This configuration improves the connection strength between the low-voltage connector 4 and the battery management module 2, making it less likely for the low-voltage connector 4 to separate from the battery management module 2, thus improving connection reliability and ensuring structural and performance stability.

[0131] Please refer to Figure 5. In one embodiment, a support rod 41 is connected between the low-voltage connector 4 and the battery management module 2.

[0132] This configuration increases the connection strength between the low-voltage connector 4 and the battery management module 2, making it less likely for the low-voltage connector 4 to separate from the battery management module 2, thus improving connection reliability and ensuring structural and performance stability. Optionally, the support rod 41 can be connected to the main control unit. When the battery management module 2 is integrated into the circuit board 21, the support rod 41 can also be connected to the slave control area 212 of the circuit board 21.

[0133] Referring to Figures 5, 7 and 11, in one embodiment, the battery device 100 further includes a second electrical connection component 14; a portion of the structure of the second electrical connection component 14 is embedded in the main housing 13, and at least some of the electrical components of the power distribution module 3 are electrically connected through the second electrical connection component 14.

[0134] Understandably, the electrical components in the power distribution module 3 include a main positive relay 32, a main negative relay 33, a fuse 31, and connectors such as a high-voltage connector 34 for connecting external devices. In some embodiments, the power distribution module 3 also includes pre-charge relays 361 and pre-charge resistors 362. In this embodiment, a second electrical connection component 14 for connecting the various electrical components in the power distribution module 3 is embedded in the main housing 13 of the mounting housing 1. The second electrical connection component 14 can be configured as a conductive structure such as copper. Using the second electrical connection component 14 to construct the electrical connection between the electrical components in the power distribution module 3 can reduce the wiring harness setup. Furthermore, the second electrical connection component 14 is not easily worn or damaged by other components of the electrical box 10, which can also improve the reliability and stability of the electrical connection, thereby reducing the risk of abnormalities due to wiring harness wear and damage, ensuring the effectiveness and reliability of the power distribution module 3, and ensuring and extending the service life of the electrical box 10. Furthermore, the main housing 13 is combined with the second electrical connection component 14, resulting in a compact structure, improved space utilization, reduced space occupied by the second electrical connection component 14, reduced assembly steps for the housing 1, and better overall structural stability.

[0135] Optionally, the main housing 13 and the second electrical connection assembly 14 can be integrated by injection molding. Alternatively, the connection strength between the second electrical connection assembly 14 and the main housing 13 can be strengthened by fasteners 16 such as bolts. Fasteners 16 can also be used to construct electrical connections between the second electrical connection assembly 14 and other devices. This results in a better combination between the second electrical connection assembly 14 and the main housing 13, improving the connection strength and overall structural stability. The position of the second electrical connection assembly 14 is more stable and less prone to displacement.

[0136] Referring to Figures 7 and 8, in one embodiment, the electrical components of the power distribution module 3 include a main positive relay 32, a high-voltage connector 34, and a main negative relay 33. The main positive relay 32, the high-voltage connector 34, and the main negative relay 33 are connected in series via a second electrical connection component 14. The main positive relay 32 and the main negative relay 33 are respectively electrically connected to the battery management module 2 via a first electrical connection component 12.

[0137] In this embodiment, the power distribution module 3 is formed by connecting a main positive relay 32, a main negative relay 33, and a high-voltage connector 34 to form a high-voltage functional circuit. The main positive relay 32 is used to control the on / off state of the positive circuit between the electrical box 10 and the battery cell 20, and the main negative relay 33 is used to control the on / off state of the negative circuit between the electrical box 10 and the battery cell 20. The connector is connected between the main positive relay 32 and the main negative relay 33 in the high-voltage circuit unit, which can be used to connect to external devices, allowing the battery device 100 to perform high-voltage charging and discharging through the high-voltage connector 34. Optionally, the power distribution module 3 can be provided with multiple parallel high-voltage circuit units between the main positive relay 32 and the main negative relay 33, and each high-voltage circuit unit is provided with a connector. For example, in the following embodiment, it can be configured as a high-voltage connector 34 and a fast-charging connector 351, respectively.

[0138] In this embodiment, the first electrical connection component 12 includes at least two fifth connection tabs 125. The main positive relay 32, the main negative relay 33, and the pre-charge relay 361 (as described in the following embodiment) in the power distribution module 3 are each electrically connected to the battery management module 2 via the fifth connection tabs 125 to control the on / off state of each relay. This arrangement saves on the relay control wiring harness between the battery management module 2 and the power distribution module 3, saving wiring space, improving the space utilization of the battery device 100, and reducing the risk of unstable relay control function due to easy wear and damage to the wiring harness.

[0139] In one embodiment, the second electrical connection assembly 14 includes a first conductive element 141 and a second conductive element 142, and the first electrical connection assembly 12 includes a first connecting tab 121 and a second connecting tab 122. The main positive relay 32 and the high-voltage connector 34 are electrically connected through the first conductive element 141, and the two ends of the first connecting tab 121 are respectively connected to the first conductive element 141 and the battery management module 2; the main negative relay 33 and the high-voltage connector 34 are electrically connected through the second conductive element 142, and the two ends of the second connecting tab 122 are respectively connected to the second conductive element 142 and the battery management module 2.

[0140] In this embodiment, the negative voltage terminal of the main positive relay 32 is electrically connected to the positive voltage terminal of the high voltage circuit unit through the first conductive element 141, and the first conductive element 141 is provided with a high voltage positive electrode sampling point. One of the multiple first electrical connection components 12 embedded in the insulating cover 11 is configured as a first connection bar 121. The two ends of the first connection bar 121 are respectively connected to the high voltage positive electrode sampling point and the battery management module 2, so that the battery management module 2 can obtain sampling information such as voltage and temperature of the high voltage positive electrode sampling point.

[0141] The negative terminal of the main negative relay 33 is used to connect to the negative terminal of the battery cell 20. The positive terminal of the main negative relay 33 is connected to the negative terminal of the high voltage circuit unit through the second conductive element 142. The second conductive element 142 is provided with a high voltage negative terminal sampling point. One of the multiple first electrical connection components 12 embedded in the insulating cover 11 is configured as a second connection bar 122. The two ends of the second connection bar 122 are electrically connected to the high voltage negative terminal sampling point and the battery management module 2 respectively, so that the battery management module 2 can obtain the voltage and temperature sampling information of the high voltage negative terminal sampling point.

[0142] This configuration allows for sampling and monitoring of the high-voltage at different locations in the power distribution module 3 via the first electrical connection component 12. This enables monitoring of the voltage information of the high-voltage circuit controlled by the main positive relay 32 and the main negative relay, allowing for appropriate control and protection operations as needed. This ensures the normal operation of the electrical box 10 and the battery device 100, and guarantees the performance and lifespan of the electrical box 10 and the battery device 100.

[0143] The power distribution module 3 may also include other electrical components, such as a shunt 37, which is used to shunt current or signals to different devices or components to achieve current shunting, distribution, and control. The power distribution module 3 may also include the fast charging circuit unit 35 and the pre-charging circuit unit 36 ​​as described in the embodiments below, which will not be elaborated here.

[0144] In one embodiment, the power distribution module 3 further includes a fuse 31, the positive terminal of the main positive relay 32 and the fuse 31 are electrically connected through a third conductive element 143, and the first electrical connection assembly 12 further includes a third connecting bar 123, the two ends of the third connecting bar 123 are respectively connected to the third conductive element 143 and the battery management module 2.

[0145] The fuse 31 automatically cuts off the power supply when the electrical device is overloaded or short-circuited, ensuring that the accessory equipment is not damaged and thus providing protection. The positive terminal of the fuse 31 is connected to the positive terminal of the battery cell 20. The positive terminal of the main positive relay 32 and the negative terminal of the fuse 31 are electrically connected through a third conductive element 143, and a fuse output sampling point is provided on the third conductive element 143. The first electrical connection assembly 12 embedded in the insulating cover 11 includes a third connecting bar 123. The two ends of the third connecting bar 123 are respectively connected to the fuse output sampling point and the battery management module 2, so that the battery management module 2 can obtain sampling information such as voltage and temperature of the fuse output sampling point.

[0146] Referring to Figures 7 and 8, in one embodiment, the power distribution module 3 further includes a pre-charge circuit unit 36 ​​connected in parallel with the main positive relay 32. The pre-charge circuit unit 36 ​​includes a pre-charge relay 361 and a pre-charge resistor 362 connected in series through a third electrical connection component 15. The positive voltage end of the pre-charge circuit unit 36 ​​is connected to the third connection bar 123, and the negative voltage end of the pre-charge circuit unit 36 ​​is connected to the first connection bar 121.

[0147] In this embodiment, a pre-charge circuit unit 36 ​​is configured in the power distribution module 3. The pre-charge circuit unit 36 ​​typically includes a pre-charge relay 361 and a pre-charge resistor 362 connected in series. The pre-charge circuit unit 36 ​​is connected in parallel with the main positive relay 32. Before the main positive relay 32 is turned on, the pre-charge circuit unit 36 ​​is turned on to perform a self-test, protecting the system from damage caused by surge power. With this configuration, the power distribution module 3 integrates a pre-charge function, thereby optimizing the performance of the electrical box 10. Furthermore, the pre-charge circuit unit 36 ​​can be directly connected to the third connecting bar 123 and the first connecting bar 121 to be connected in parallel with the main positive relay 32, simplifying the electrical connection structure of the power distribution module 3 and facilitating the integration and miniaturization of the power distribution module 3 and the electrical box 10.

[0148] Please refer to Figure 8. In one embodiment, the first connecting bar 121 is provided with a first branch bar 1211 connected to the negative pressure end of the precharge circuit unit 36.

[0149] This configuration improves connection convenience and design flexibility by branching out a first branch bar 1211 from the first connecting bar 121 for connection to the precharge circuit unit 36. The first branch bar 1211 can extend to a position that facilitates connection to the precharge circuit unit 36.

[0150] Referring to Figure 8, in one embodiment, the third connecting bar 12 is provided with a second branch bar 1231 that is connected to the positive pressure end of the precharge circuit unit 36.

[0151] This configuration improves connection convenience and design flexibility by branching off a second branch bar 1231 from the third connecting bar 123 for connection to the precharge circuit unit 36. The second branch bar 1231 can extend to a position that facilitates connection to the precharge circuit unit 36.

[0152] Referring to Figures 7 and 8, in one embodiment, the power distribution module 3 further includes a fast charging circuit unit 35, which includes a fast charging connector 351 and a fast charging relay 352 connected in series via a fourth conductive element 144. Part of the structure of the fourth conductive element 144 is embedded in the main housing 13. The first electrical connection assembly 12 further includes a fourth connecting bar 124, the two ends of which are respectively connected to the fourth conductive element 144 and the battery management module 2.

[0153] In this embodiment, two high-voltage circuit units are connected in parallel in the power distribution module 3. One high-voltage circuit unit is configured as a fast-charging circuit unit 35, with a fast-charging connector 351. The electricity through the fast-charging connector 351 is high-voltage direct current, which can be directly supplied to the battery cell 20 for charging without processing, thereby improving the charging speed. The fast-charging relay 352 of the fast-charging circuit unit 35 is electrically connected to the battery management module 3 through the fifth connecting plate 125, and the battery management module 3 can control the opening and closing of the fast-charging circuit unit 35. The other high-voltage circuit unit is configured as a high-voltage slow-charging circuit. For easy distinction, the connector on this high-voltage slow-charging circuit is a high-voltage connector 34. The electricity through the high-voltage connector 34 is high-voltage alternating current, which needs to be converted by the electrical box 10 before being supplied to the battery cell 20 for charging.

[0154] This configuration allows for the selection of fast-charging connector 351 and high-voltage connector 34 to charge the battery cell 20 as needed, enriching the functionality of the electrical box 10. Furthermore, the parallel connection method, with both charging circuits sampling and monitoring voltage through the same sampling point, simplifies the structural design of the power distribution module 3, facilitating the integration and miniaturization of the power distribution module 3 and the electrical box 10. Additionally, the sampling of the fast-charging circuit unit 35 via the fourth connecting plate 124 ensures stable fast-charging functionality.

[0155] The second electrical connection assembly 14 includes a fourth conductive element 144 for connecting the fast charging relay 352 and the fast charging connector 351. This fourth conductive element 144 is also embedded in the main housing 13, which reduces the amount of wiring harness required. Furthermore, the fourth conductive element 144 is less susceptible to wear and damage from other components of the electrical box 10, which also improves the reliability and stability of the electrical connection, thereby reducing the risk of abnormalities caused by wear and damage to the wiring harness.

[0156] Please refer to Figure 10. In one embodiment, a portion of the structure of the third electrical connection assembly 15 is embedded in the insulating cover 11.

[0157] In this embodiment, the precharge relay 361 is electrically connected to the battery management module 3 via the fifth connecting bar 125, and the battery management module 3 can control the opening and closing of the precharge circuit unit 36. In specific applications, the precharge circuit unit can be connected via the precharge relay 361 for self-testing before the main positive relay 32 is turned on, protecting the system from damage by surge power. The precharge resistor 362 has a current limiting function to prevent the large current at the moment of power-on from damaging other electrical components in the high-voltage system.

[0158] The pre-charge relay 361 and the pre-charge resistor 362 are electrically connected through a third electrical connection component 15 embedded in the insulating cover 11. The third electrical connection component 15 can be a copper bar or other conductive sheet, eliminating the need for wire harness connection between the pre-charge relay 361 and the pre-charge resistor 362, thus improving connection convenience and stability. Optionally, the insulating cover 11 and the third electrical connection component 15 can be integrated by injection molding, thereby achieving a better combination between the third electrical connection component 15 and the insulating cover 11, improving connection strength and overall structural stability. The position of the third electrical connection component 15 is relatively stable and not easily misaligned, ensuring a stable connection between the pre-charge relay 361 and the pre-charge resistor 362. The overall structure is stable and compact, which is beneficial for the integration and miniaturization of the electrical box 10.

[0159] Referring to Figures 6 and 7, in one embodiment, the first electrical connection component 12 is directly soldered to the battery management module 2. This arrangement provides a high connection strength between the first electrical connection component 12 and the battery management module 2, ensuring a stable electrical connection between them and guaranteeing the stable performance of the electrical box 10.

[0160] In one embodiment, the first electrical connection assembly 12 and the insulating cover 11 are integrally injection molded. This arrangement makes the integration of the first electrical connection assembly 12 and the insulating cover 11 more convenient and provides higher structural stability.

[0161] Referring to Figures 5 and 8, in one embodiment, the first electrical connection component 12 is electrically connected to the power distribution module 3 via fastener 16.

[0162] In this embodiment, the fastener 16 can be configured as a bolt or other conductive connector, facilitating the connection and disassembly of the first electrical connection assembly 12 and the power distribution module 3, while also providing good connection strength and stability to ensure the stable performance of the electrical box 10. Optionally, the fastener 16 passes through the main housing 13 and the second electrical connection assembly 14 embedded in the main housing 13, and connects to the first electrical connection assembly 12, thereby electrically connecting the first electrical connection assembly 12 to the power distribution module 3 through the second electrical connection assembly 14.

[0163] Referring to Figures 4 to 6, in one embodiment, the mounting housing 1 further includes an upper cover 17, which covers the insulating cover 11 on the side opposite to the main housing 13, and the battery management module 2 is disposed between the upper cover 17 and the insulating cover 11.

[0164] This configuration utilizes the top cover 17 and the insulating cover 11 to form a containment space, providing good protection for the battery management module 2 and reducing the risk of damage. The top cover 17 and the insulating cover 11 can be connected and fixed by means of snap-fit, bolt, or adhesive.

[0165] Referring to Figures 2 and 3, in one embodiment, and referring to Figure 1, the battery device 100 further includes a lower housing 40. The lower housing 40 includes a bottom wall and side walls surrounding the bottom wall. The bottom wall and side walls enclose an installation space. One side wall is designated as a first side wall 401, and a clearance opening is provided on the first side wall 401. At least a portion of the structure of at least one of the low-voltage connector 4, high-voltage connector 34, or other connectors of the electrical box 10 extends from the side of the first side wall 401 facing the installation space to the side of the first side wall 401 opposite to the installation space through the clearance opening.

[0166] In this embodiment, the connector of the electrical box 10 passes through the clearance opening of the first side wall 401 to be exposed on the outside of the lower shell 40. The connector of the electrical box 10 includes at least one of the connectors such as the low-voltage connector 4, the high-voltage connector 34 and the fast-charging connector 351 in the aforementioned embodiments, so as to facilitate the electrical box 10 to be electrically connected to external electrical appliances through the connector.

[0167] Referring to Figures 2 and 3, in one embodiment, the mounting housing 1 is provided with a locking structure 18, which is locked to the first sidewall 401.

[0168] Specifically, the locking structure 18 of the mounting housing 10 is configured to fix the electrical box 10 along the first direction X. In practical applications, the first direction X is the arrangement direction of the electrical box 10 and the first side wall 401, and the depth direction of the accommodating space is the second direction Y, which is perpendicular to the first direction X. With this configuration, the locking structure 18 can be fixed to the first side wall 40 of the lower housing 40, so that the locking force on the locking structure 18 when it is fixed is directed towards the side of the electrical box 10. This prevents the electrical box 10 from being subjected to pressure towards the bottom wall of the mounting space, which could cause the connector to shift. This ensures the positional accuracy of the connector and avoids the problem of poor electrical connection due to connector shift, increasing connector reliability, reducing problems such as burning and improper installation, and ensuring stable performance.

[0169] Optionally, the locking structure 18 may be provided with a connecting hole, and may be locked onto the lower shell 40 of the battery device 100 by means of bolts or rivets. The locking structure 18 may also be configured as a snap-fit ​​or plug-in structure to snap-fit ​​or plug-in with the lower shell 40, which is not limited here.

[0170] Referring to Figures 2 to 11, this application also proposes an electrical box 10, which includes a mounting shell 1, a battery management module 2, a power distribution module 3, and a first electrical connection component 12. The mounting shell 1 includes a main shell 13 and an insulating cover 11. The insulating cover 11 covers the main shell 13 to form an accommodating space. The power distribution module 3 is disposed in the accommodating space inside the insulating cover 11. The battery management module 2 is disposed on the outside of the insulating cover 11. Part of the structure of the first electrical connection component 12 is embedded in the insulating cover 11. Part of the structure of the first electrical connection component 12 protrudes from the inside and outside of the insulating cover 11, so that the first electrical connection component 12 connects the power distribution module 3 and the battery management module 2.

[0171] In this embodiment, the battery management module 2 and the power distribution module 3 are integrated into a single electrical box 10. The electrical box 10 is equipped with a mounting shell 1 as the basis for module installation. The mounting shell 1 can be configured to be formed by at least a main shell 13 and an insulating cover 11 covering each other. The main shell 13 and the insulating cover 11 enclose a receiving space. The main shell 13 and the insulating cover 11 can be fixedly connected by means of snap-fit ​​connection, bolt connection or adhesive.

[0172] Battery management module 2 and power distribution module 3 are respectively disposed on opposite sides of insulating cover 11; power distribution module 3 is disposed in the receiving space formed by main housing 13 and insulating cover 11, and battery management module 2 is disposed on the side of insulating cover 11 opposite to the receiving space; optionally, mounting housing 1 may also include upper cover 17 covering the outside of insulating cover 11, and at least part of the structure of battery management module 2 may be disposed between insulating cover 11 and upper cover 17. Power distribution module 3 is used for connection, distribution, protection and control between battery device 100 and electrical equipment, to perform power distribution management, distribute the power of the power system and control the power flow of each component. The battery management module 2 is a system for monitoring and managing the battery device 100. It is connected to the battery cells 20 through the sampling component 30, which can collect the temperature and voltage information of each battery cell 20. The battery management module 2 also performs high and low voltage sampling on the power distribution module 3. By collecting and calculating parameters such as voltage, current, temperature and SOC of the battery cells 20 and the power distribution module 3, it controls the charging and discharging process of the battery device 100.

[0173] The power distribution module 3 may include a main positive relay 32, a main negative relay 33, a fuse 31, a shunt 37, and connectors for cooperating with external devices. These components are electrically connected to form a high-voltage functional circuit. In this embodiment, a high-voltage circuit refers to a circuit with a voltage exceeding 60V, and a high-voltage connector 34 and other high-voltage components are parts capable of carrying current exceeding 60V (high-voltage current). Correspondingly, a low-voltage circuit refers to a circuit with a voltage not exceeding 60V, and a low-voltage connector 4 is a part capable of carrying current not exceeding 60V (low-voltage current). The battery management module 2 may be configured as a circuit board or other structural forms. Optionally, the battery management module 2 includes a master control unit and a slave control unit, which are electrically connected. The slave control unit can collect sampling information such as voltage and temperature from individual battery cells 20. The master control unit can receive sampling information such as voltage, current, and temperature collected by the slave control unit and sampling information such as voltage, current, and temperature collected from various sampling points in the power distribution module 3, thereby performing the main protection and battery management functions based on the sampling information.

[0174] The first electrical connection component 12 for connecting the battery management module 2 and the power distribution module 3 is embedded in the insulating cover 11. The first electrical connection component 12 can be configured as a conductive structure such as copper. Using the first electrical connection component 12 to construct the electrical connection between the battery management module 2 and the power distribution module 3 can reduce the amount of wiring harness required.

[0175] The insulating cover 11 and the first electrical connection assembly 12 can be integrally connected by injection molding, thereby achieving a better combination between the insulating cover 11 and the first electrical connection assembly 12, improving connection strength and overall structural stability, and making the position of the first electrical connection assembly 12 more stable and less prone to displacement. Furthermore, the first electrical connection assembly 12 is less susceptible to wear and damage from other components of the electrical box 10, which also improves the reliability and stability of the electrical connection. This reduces the risk of abnormalities in the high-voltage sampling function due to wiring harness wear and damage, ensuring the long-term effectiveness and reliability of the high-voltage sampling function, and extending the service life of the electrical box 10. Moreover, combining the insulating cover 11 and the first electrical connection assembly 12 results in a compact structural arrangement, improving space utilization and reducing the space occupied by the first electrical connection assembly 12.

[0176] In the technical solution of this application, both the battery management module 2 and the power distribution module 3 are mounted on the mounting housing 1, and are electrically connected via a first electrical connection component 12 embedded in the insulating cover 11. This arrangement integrates the battery management module 2 and the power distribution module 3 into an electrical box 10, facilitating easy assembly and disassembly. Furthermore, the battery management module 2 and the power distribution module 3 do not require wiring harness connections. The overall structure of the electrical box 10 is compact, resulting in a relatively small overall volume and minimal space occupation within the battery device 100, which is beneficial for increasing the battery capacity within the battery device 100.

[0177] Referring to Figures 5 and 6, in one embodiment, the battery management module 2 includes a circuit board 21, which includes a master control area 211 and a slave control area 212. The master control area 211 is electrically connected to the slave control area 212 through the built-in circuit of the circuit board 21. Multiple battery cells 20 are connected to the same sampling component 30, which is connected to the slave control area 212.

[0178] In this embodiment, the main control area 211 on the circuit board 21 is provided with a main control circuit and corresponding electronic components, serving as the main control unit of the battery management module 2; the slave control area 212 on the circuit board 21 is provided with a slave control circuit and corresponding electronic components, serving as the slave control unit of the battery management module 2. That is, the main control unit and the slave control unit are integrated on the circuit board 21, making the battery management module 2 integrated, reducing the number of components in the battery management module 2, and saving the wiring harness or other connectors between the main control unit and the slave control unit. This results in a compact overall structure, which helps to reduce the size of the battery management module 2 and the electrical box 10, and also makes the assembly and disassembly of the battery management module 2 more convenient.

[0179] The battery cell 20 in the battery device 100 is electrically connected to the slave control circuit of the slave control area 212 through the sampling component 30, so that the voltage signal and temperature signal of the battery cell 20 can be transmitted to the battery management module 2, so as to realize the effective transmission and acquisition of the voltage signal and temperature signal of the battery cell 20, and thus perform thermal management and / or safety management of the battery cell 20 based on the sampling signal.

[0180] In this configuration, multiple battery cells 20 are connected to the same sampling component 30, reducing the number of components in the battery device 100 and simplifying its structure. Optionally, all battery cells 20 in the battery device 100 can be connected to the same sampling component 30, or multiple sampling components 30 can be set, with each sampling component 30 connecting to a portion of the battery cells 20; this is not limited here.

[0181] Referring to Figures 2 and 4, in one embodiment, the circuit board 21 includes a first connector 213, and the sampling component 30 includes a board body and a second connector (not shown). The board body is provided with sampling lines, which connect the battery cell 20 to the second connector. The first connector 213 is plugged into the second connector.

[0182] In this embodiment, the main body 32 of the sampling component 30 can be a rigid circuit board or a flexible circuit board. Sampling lines are provided in the main body 32, and these sampling lines are conductive layers located on or inside the main body 32, which can be formed of copper wire or other conductive materials. The first connector 213 and the second connector are male and female connectors that can be plugged into each other. The battery management module 2 and the sampling component 30 can be connected and disconnected by plugging and unplugging the first connector 213 and the second connector, making assembly and disassembly convenient. Furthermore, the adapter cable bundle between the sampling component 30 and the battery management module 2 can be eliminated, saving wiring space and improving the space utilization of the battery device 100.

[0183] In one embodiment, the circuit board 21 includes a first soldering part (not shown), the sampling component 30 includes a board body and a second soldering part (not shown) disposed on the board body, the board body is provided with sampling lines, the sampling lines connect the battery cell 20 and the second soldering part, and the first soldering part and the second soldering part are soldered to connect the circuit board 21 and the sampling component 30.

[0184] In this embodiment, one of the first welding part and the second welding part can be configured as a solder pad, and the other as a welding pin, with the welding pin soldered onto the solder pad; alternatively, one of the first welding part and the second welding part can be configured as a welding hole, and the other as a welding needle, with the welding needle inserted into the welding hole for welding. Using the above methods, the connection strength between the sampling component 30 and the battery management module 2 is high, maintaining a stable electrical connection between them and ensuring stable performance.

[0185] Referring to Figures 3 and 5, in one embodiment, the electrical box 10 further includes a low-voltage connector 4, which is directly connected to the battery management module 2.

[0186] In this embodiment, the battery management module 2 has a low-voltage control circuit, which is a circuit used to control and operate a high-voltage system. The low-voltage connector 4 is electrically connected to the low-voltage control loop, enabling the low-voltage control loop to perform low-voltage control on the connected object of the low-voltage connector 4. That is, the low-voltage control loop can communicate with the connected object of the low-voltage connector 4 through the low-voltage connector 4 and control and operate it.

[0187] The low-voltage connector 4 is directly connected to the battery management module 2. The low-voltage connector 4 and the battery management module 2 can be connected by at least one method such as plugging or soldering. This eliminates the need for a wire harness connection between the low-voltage connector 4 and the battery management module 2, improves the connection stability between them, reduces the risk of abnormal low-voltage control function due to easy wear and damage of the wire harness, and also reduces the space required for wiring harness arrangement, making the structure more compact, improving space utilization, and reducing the volume of the electrical box 10.

[0188] Please refer to Figure 5. In one embodiment, the low-voltage connector 4 includes a connection terminal 42, and the battery management module 2 includes a main control unit. The main control unit has a socket (not shown), and the connection terminal 42 is inserted into the socket to connect with the main control unit.

[0189] Specifically, the low-voltage connector 4 is provided with a connection terminal 42, and the battery management module 2 includes a main control unit, so that the connection terminal 42 of the low-voltage connector 4 is inserted into the socket of the main control unit, thereby making an electrical connection between the low-voltage connector 4 and the battery management module 2.

[0190] Optionally, the battery management module 2 may include a separate master control unit and a slave control unit, which are electrically connected. The master control unit is connected to the low-voltage connector 4 and the first electrical connection component 12, and the slave control unit is used to electrically connect to the battery cell 20. The master control unit and the slave control unit can be configured as an integrated structure. For example, in the previous embodiment, the battery management module 2 is configured as a circuit board 21. The master control area 211 on the circuit board 21 is provided with a master control circuit and corresponding electronic components, serving as the master control unit of the battery management module 2; the slave control area 212 on the circuit board 21 is provided with a slave control circuit and corresponding electronic components, serving as the slave control unit of the battery management module 2.

[0191] In one embodiment, the connection terminal 41 is soldered to the main control unit. This configuration improves the connection strength between the low-voltage connector 4 and the battery management module 2, making it less likely for the low-voltage connector 4 to separate from the battery management module 2, thus improving connection reliability and ensuring structural and performance stability.

[0192] Please refer to Figure 5. In one embodiment, a support rod 41 is connected between the low-voltage connector 4 and the battery management module 2.

[0193] This configuration increases the connection strength between the low-voltage connector 4 and the battery management module 2, making it less likely for the low-voltage connector 4 to separate from the battery management module 2, thus improving connection reliability and ensuring structural and performance stability. Optionally, the support rod 41 can be connected to the main control unit. When the battery management module 2 is integrated into the circuit board 21, the support rod 41 can also be connected to the slave control area 212 of the circuit board 21.

[0194] Referring to Figures 5, 7 and 11, in one embodiment, the battery device 100 further includes a second electrical connection component 14; a portion of the structure of the second electrical connection component 14 is embedded in the main housing 13, and at least some of the electrical components of the power distribution module 3 are electrically connected through the second electrical connection component 14.

[0195] Understandably, the electrical components in the power distribution module 3 include a main positive relay 32, a main negative relay 33, a fuse 31, and connectors such as a high-voltage connector 34 for connecting external devices. In some embodiments, the power distribution module 3 also includes pre-charge relays 361 and pre-charge resistors 362. In this embodiment, a second electrical connection component 14 for connecting the various electrical components in the power distribution module 3 is embedded in the main housing 13 of the mounting housing 1. The second electrical connection component 14 can be configured as a conductive structure such as copper. Using the second electrical connection component 14 to construct the electrical connection between the electrical components in the power distribution module 3 can reduce the wiring harness setup. Furthermore, the second electrical connection component 14 is not easily worn or damaged by other components of the electrical box 10, which can also improve the reliability and stability of the electrical connection, thereby reducing the risk of abnormalities due to wiring harness wear and damage, ensuring the effectiveness and reliability of the power distribution module 3, and ensuring and extending the service life of the electrical box 10. Furthermore, the main housing 13 is combined with the second electrical connection component 14, resulting in a compact structure, improved space utilization, reduced space occupied by the second electrical connection component 14, reduced assembly steps for the housing 1, and better overall structural stability.

[0196] Optionally, the main housing 13 and the second electrical connection assembly 14 can be integrated by injection molding. Alternatively, the connection strength between the second electrical connection assembly 14 and the main housing 13 can be strengthened by fasteners 16 such as bolts. Fasteners 16 can also be used to construct electrical connections between the second electrical connection assembly 14 and other devices. This results in a better combination between the second electrical connection assembly 14 and the main housing 13, improving the connection strength and overall structural stability. The position of the second electrical connection assembly 14 is more stable and less prone to displacement.

[0197] The electrical box 10 proposed in this application can also adopt the technical solutions used in the electrical box 10 in the aforementioned battery device 100 embodiments, which will not be elaborated here.

[0198] The present invention also proposes an electrical device, which includes the battery device 100 provided in any of the foregoing embodiments. In the embodiments of this application, the electrical device refers to a device that uses a battery to provide electrical energy, and may be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0199] The specific structure of the battery device 100 in this embodiment refers to the above embodiment. By using the battery device 100 provided in the aforementioned embodiment in the power-consuming device, it is beneficial to increase the battery capacity of the battery device 100 in the power-consuming device and improve the performance of the power-consuming device.

[0200] Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0201] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized by, The battery device includes an electrical box and battery cells, the electrical box being electrically connected to the battery cells, and the electrical box comprising: The mounting housing includes an insulating cover and a main housing, wherein the insulating cover covers the main housing to form an accommodating space; A power distribution module, wherein the power distribution module is disposed in the receiving space inside the insulating cover; A battery management module is provided on the outside of the insulating cover; A first electrical connection component is partially embedded in the insulating cover, and a portion of the first electrical connection component protrudes from the inner and outer sides of the insulating cover, so that the first electrical connection component connects the power distribution module and the battery management module.

2. The battery device of claim 1, wherein The battery management module includes a circuit board, which includes a master control area and a slave control area. The master control area is electrically connected to the slave control area through the built-in circuit of the circuit board. Multiple battery cells are connected to the same sampling component, which is connected to the slave control area.

3. The battery device of claim 2, wherein The circuit board includes a first connector, and the sampling component includes a board body and a second connector. The board body is provided with a sampling line, which connects the battery cell to the second connector. The first connector and the second connector are plugged into each other.

4. The battery device of claim 2, wherein The circuit board includes a first soldering part, and the sampling component includes a board body and a second soldering part disposed on the board body. The board body is provided with a sampling line, which connects the battery cell and the second soldering part. The first soldering part and the second soldering part are soldered to connect the circuit board and the sampling component.

5. The battery device as defined in any one of claims 1 to 4, characterized by The electrical box also includes a low-voltage connector, which is directly connected to the battery management module.

6. The battery device of claim 5, wherein The low-voltage connector includes a connection terminal, and the battery management module includes a main control unit. The main control unit is provided with a socket, and the connection terminal is inserted into the socket to connect with the main control unit.

7. The battery device of claim 6, wherein The connection terminal is welded to the main control unit; And / or, a support rod is connected between the low-voltage connector and the battery management module.

8. The battery device as defined in any one of claims 1 to 7, characterized by The battery device further includes a second electrical connection component, a portion of which is embedded in the main housing, and at least some of the electrical components of the power distribution module are electrically connected through the second electrical connection component.

9. The battery device of claim 8, wherein, The power distribution module includes a main positive relay, a high-voltage connector, and a main negative relay, which are connected in series via the second electrical connection component. The main positive relay and the main negative relay are respectively electrically connected to the battery management module through the first electrical connection component.

10. The battery device of claim 9, wherein, The second electrical connection assembly includes a first conductive element and a second conductive element, and the first electrical connection assembly further includes a first connecting tab and a second connecting tab; The main positive relay and the high voltage connector are electrically connected through the first conductive element, and the two ends of the first connecting plate are respectively connected to the first conductive element and the battery management module; The main negative relay and the high voltage connector are electrically connected through a second conductive element, and the two ends of the second connecting plate are respectively electrically connected to the second conductive element and the battery management module.

11. The battery device of claim 10, wherein, The power distribution module also includes a fuse, and the second electrical connection assembly also includes a third conductive element. The fuse is electrically connected to the positive voltage terminal of the main positive relay through the third conductive element. The first electrical connection assembly further includes a third connection bar, the two ends of which are respectively connected to the third conductive element and the battery management module.

12. The battery device of claim 11, wherein, The power distribution module also includes a pre-charge circuit unit connected in parallel with the main positive relay. The pre-charge circuit unit includes a pre-charge relay and a pre-charge resistor connected in series through a third electrical connection component. The positive pressure end of the pre-charge circuit unit is connected to the third connecting plate, and the negative pressure end of the pre-charge circuit unit is connected to the first connecting plate.

13. The battery device of claim 12, wherein, A portion of the structure of the third electrical connection component is embedded in the insulating cover.

14. The battery device according to claim 12 or 13, wherein The first connecting bar is provided with a first branch bar that is connected to the negative pressure end of the pre-charge circuit unit; And / or, the third connecting bar branch is provided with a second branch bar connected to the positive pressure end of the precharge circuit unit.

15. The battery device as defined in any one of claims 8 to 14, characterized by The power distribution module includes a fast charging circuit unit, which includes a fast charging connector and a fast charging relay connected in series via a fourth conductive element. A portion of the structure of the fourth conductive element is embedded in the main housing. The first electrical connection assembly further includes a fourth connection bar, the two ends of which are respectively connected to the fourth conductive element and the battery management module.

16. The battery device as defined in any one of claims 1 to 15, characterized by The first electrical connection component is directly soldered to the battery management module; And / or, the first electrical connection assembly is integrally injection molded with the insulating cover; And / or, the first electrical connection component is electrically connected to the power distribution module via fasteners.

17. The battery device as defined in any one of claims 1 to 16, characterized by The mounting housing also includes a top cover, which covers the insulating cover on the side opposite to the main housing, and the battery management module is located between the top cover and the insulating cover.

18. The battery device as claimed in any one of claims 1 to 17, characterized by The battery device also includes a lower housing, which has an installation space and a clearance opening on the first side wall of the lower housing; Both the battery cell and the electrical box are located in the mounting space. At least a portion of the structure of at least one of the low-voltage connector, high-voltage connector, or other connectors of the electrical box extends from the side of the first sidewall facing the mounting space to the side of the first sidewall away from the mounting space through the clearance opening.

19. The battery device of claim 18, wherein, The mounting housing is provided with a locking structure, which is locked to the first side wall.

20. An electrical box, characterized by include: The mounting housing includes an insulating cover and a main housing, wherein the insulating cover covers the main housing to form an accommodating space; A power distribution module, wherein the power distribution module is disposed in the receiving space inside the insulating cover; A battery management module is provided on the outside of the insulating cover; A first electrical connection component is partially embedded in the insulating cover, and a portion of the first electrical connection component protrudes from the inner and outer sides of the insulating cover, so that the first electrical connection component connects the power distribution module and the battery management module.

21. The electrical box of claim 20, wherein, The battery management module includes a circuit board, which includes a master control area and a slave control area. The master control area is electrically connected to the slave control area through the built-in circuit of the circuit board. Multiple battery cells are connected to the same sampling component, which is connected to the slave control area.

22. The electrical box of claim 21, wherein, The circuit board includes a first connector, and the sampling component includes a board body and a second connector. The board body is provided with a sampling line, which connects the battery cell to the second connector. The first connector and the second connector are plugged into each other.

23. The electrical box of claim 21, wherein, The circuit board includes a first soldering part, and the sampling component includes a board body and a second soldering part disposed on the board body. The board body is provided with a sampling line, which connects the battery cell and the second soldering part. The first soldering part and the second soldering part are soldered to connect the circuit board and the sampling component.

24. The electrical box according to any one of claims 20-23, wherein, The electrical box also includes a low-voltage connector, which is directly connected to the battery management module; And / or, the mounting housing further includes a second electrical connection assembly, a portion of which is embedded in the main housing, and at least some of the electrical components of the power distribution module are electrically connected through the second electrical connection assembly.

25. An electrical device, comprising: Includes the battery device as described in any one of claims 1 to 19.

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