Battery device and electric device

Abstract

The application is suitable for the technical field of battery, and provides a battery device and a power utilization device. The battery device comprises a box body, a battery monomer assembly and a cover body assembly. The cover body assembly comprises a cover body, a high-voltage electrical assembly and a low-voltage electrical assembly. The cover body is covered on the box body and is provided with an accommodating space in the cover body. The high-voltage electrical assembly and the low-voltage electrical assembly are fixedly connected to the cover body and are at least partially arranged in the accommodating space. The high-voltage electrical assembly comprises a high-voltage box and a high-voltage connector electrically connected to the high-voltage box. The high-voltage box is electrically connected to the battery monomer assembly. The low-voltage electrical assembly comprises a battery management unit, a low-voltage connector and a low-voltage wire harness. The battery management unit is electrically connected to the battery monomer assembly. The low-voltage connector is electrically connected to the battery management unit through the low-voltage wire harness. The battery device provided by the application fixes the high-voltage electrical assembly and the low-voltage electrical assembly on the cover body, and solves the problems of small installation space of electrical components, inconvenient assembly and maintenance.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device 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, battery technology is a crucial factor in their development.

[0003] As the energy storage system of new energy electric vehicles, the battery not only integrates multiple battery cells, but also important electrical components such as the battery management system, low-voltage wiring harness, high-voltage box, and bracket. These electrical components occupy the enclosure space, and within the limited enclosure space, the installation space for electrical components is small, making assembly and maintenance inconvenient. Utility Model Content

[0004] In view of this, the present application provides a battery device and an electrical device, which solves the problems of small installation space for electrical components and inconvenience in assembly and maintenance.

[0005] An embodiment of the first aspect of this application provides a battery device, comprising: a housing body; a battery cell assembly disposed within the housing body; and a cover assembly, the cover assembly including a cover, a high-voltage electrical component, and a low-voltage electrical component. The cover is fitted onto the housing body and has a receiving space within it. The high-voltage electrical component and the low-voltage electrical component are fixedly connected to the cover and at least partially disposed within the receiving space. The high-voltage electrical component includes a high-voltage box and a high-voltage connector electrically connected to the high-voltage box, the high-voltage box being electrically connected to the battery cell assembly. The low-voltage electrical component includes a battery management unit, a low-voltage connector, and a low-voltage wiring harness. The battery management unit is electrically connected to the battery cell assembly, and the low-voltage connector is electrically connected to the battery management unit via the low-voltage wiring harness.

[0006] In the battery device provided in this application embodiment, high-voltage electrical components and low-voltage electrical components are fixedly connected to the cover and at least partially disposed within the receiving space of the cover. That is, the high-voltage electrical components and low-voltage electrical components are integrated on the cover to form a cover assembly. The cover assembly can be disassembled and installed independently, and electrical components such as the high-voltage box and battery management unit can also be replaced individually. The disassembly and assembly of electrical components provides a large operating space, facilitating assembly. The above-mentioned battery device can reduce the space occupied by electrical components within the housing and facilitate the assembly of electrical components, solving the problem of inconvenient assembly of electrical components such as the high-voltage box and battery management unit within the limited housing space, thus improving the installation efficiency of the battery device. By integrating the high-voltage electrical components and low-voltage electrical components on the cover and at least partially residing within the cover, while installing the battery cell assembly, which occupies the largest space, within the housing, it is beneficial to improve the energy density of the battery device.

[0007] In some embodiments, one or more of the high-voltage box, high-voltage connector, battery management unit, low-voltage connector, and low-voltage wiring harness are detachably connected to the cover.

[0008] By adopting the above technical solution, one or more of the high-voltage box, high-voltage connector, battery management unit, low-voltage connector and low-voltage wiring harness can be installed, removed and replaced individually, which facilitates maintenance.

[0009] In some embodiments, the high-voltage box contains a sampling harness, which is electrically connected to the battery management unit via a low-voltage harness.

[0010] By adopting the above technical solution, the sampling harness inside the high-voltage box can be electrically connected to the battery management unit through the low-voltage harness, and the high-voltage box can transmit sampling signals to the battery management unit.

[0011] In some embodiments, the cover assembly further includes an adapter connector for connecting the sampling harness and the low-voltage harness.

[0012] By adopting the above technical solution, when it is necessary to disassemble the high-voltage box, the connection between the high-voltage box and the battery management unit can be disconnected through the adapter connector, making it convenient to disassemble and replace the high-voltage box separately.

[0013] In some embodiments, the cover has a first protrusion and a second protrusion at both ends along its length, and the accommodating space includes a first accommodating area located in the first protrusion and a second accommodating area located in the second protrusion; the high-voltage box includes a first high-voltage box and a second high-voltage box, the first high-voltage box is located in the first accommodating area, the second high-voltage box is located in the second accommodating area, and the first high-voltage box and the second high-voltage box are electrically connected through a high-voltage switch.

[0014] By adopting the above technical solution, the accommodating space inside the cover can be flexibly utilized to accommodate the high-voltage box, solving the problem that the high-voltage box is inconvenient to accommodate due to its large size; the first high-voltage box and the second high-voltage box are set up separately and can be disassembled independently, further improving the convenience of maintaining the high-voltage box.

[0015] In some embodiments, the cover is provided with high-voltage connectors at opposite ends along its length, and the first high-voltage box and the second high-voltage box are electrically connected to the corresponding high-voltage connectors.

[0016] By adopting the above technical solution, the first high-voltage box and the second high-voltage box are electrically connected to their respective high-voltage connectors, and both the first high-voltage box and the second high-voltage box can transmit high-voltage power to the high-voltage components through their respective high-voltage connectors.

[0017] In some embodiments, the first high-voltage box and / or the second high-voltage box are connected to the corresponding high-voltage connector via a connecting bar.

[0018] By adopting the above technical solution, the connecting plate is rigidly connected directly without intermediate terminals, reducing contact resistance. Furthermore, the connecting plate has a longer mechanical life and better reliability.

[0019] In some embodiments, the cover assembly further includes a first thermal management component detachably connected to the cover, the first thermal management component having a heat exchange channel for the flow of heat exchange medium, the first thermal management component being used for heat exchange with a first high-pressure box and a second high-pressure box.

[0020] By setting up a first thermal management component, the high-voltage box can be cooled independently, reducing the risk of electrical performance degradation and mechanical failure caused by excessively high voltage box temperature, thus improving the reliability of the battery device.

[0021] In some embodiments, a first thermal management component is disposed on the side of the high-voltage box away from the cover. The first thermal management component includes a first heat exchange section, a second heat exchange section, and a connecting section. A heat exchange channel extends simultaneously within the first heat exchange section, the connecting section, and the second heat exchange section. The first heat exchange section is attached to the first high-voltage box, the second heat exchange section is attached to the second high-voltage box, and the connecting section connects the first heat exchange section and the second heat exchange section. The low-voltage wiring harness is arranged in parallel with the connecting section.

[0022] The structure of the first thermal management component provided in this application embodiment is compatible with the structure of the high-pressure box, and can achieve good heat exchange effect in a limited space.

[0023] In some embodiments, the battery device includes a plurality of battery cell assemblies forming a battery module, the battery module having a total positive output terminal and a total negative output terminal; the high voltage box has a total positive connection portion and a total negative connection portion, the total positive connection portion being used to connect to the total positive output terminal and the total negative connection portion being used to connect to the total negative output terminal; the cover has a first maintenance window, the first maintenance window being used to expose the total positive connection portion and the total negative connection portion.

[0024] By adopting the above technical solution, operators can disconnect and connect the high-voltage connection through the first maintenance window, which not only significantly improves the safety of the battery device during the replacement of the high-voltage box and high and low voltage connectors, but also reduces the operational risks during after-sales maintenance and repair, further ensuring the safety of the entire vehicle.

[0025] In some embodiments, the battery device further includes a module low-voltage wiring harness electrically connected to the battery module; a second maintenance window is provided on the cover, the second maintenance window is disposed opposite to the battery management unit, and the second maintenance window is used to expose the connection between the module low-voltage wiring harness and the battery management unit.

[0026] By adopting the above technical solution, operators can disconnect and connect the low-voltage connection through the second maintenance window, ensuring that the low-voltage line remains in a safe state during the disassembly and assembly process. This not only improves the safety of the battery pack disassembly and assembly process but also provides a higher level of safety assurance for subsequent after-sales maintenance and repair operations.

[0027] In some embodiments, the low-voltage electrical component further includes a monitoring module, which is fixedly connected to the cover and electrically connected to the battery management unit.

[0028] By adopting the above technical solution, the monitoring module is also integrated into the cover, making it convenient to connect the monitoring module to the battery management unit.

[0029] In some embodiments, the cover is provided with a vehicle wiring harness fixing structure, which includes at least one of a fixing bracket and a fixing post.

[0030] By setting a vehicle wiring harness fixing structure on the cover, the function of the cover is improved, making it easier and more stable to connect the vehicle wiring harness to the cover.

[0031] In some embodiments, the cover is a die-cast cover.

[0032] The cover is a die-cast cover, which has good mechanical properties and can meet the rigidity and strength requirements of the cover. In addition, the cover has the advantage of high integration, which makes it easy to integrate electrical components onto the cover.

[0033] In some embodiments, the cover has a plurality of connection holes, and at least one of the high-voltage box, the battery management unit, and the low-voltage connector is fixedly connected to the cover by fasteners passing through the connection holes; and / or, the cover has a wire harness fixing structure for supporting the low-voltage wire harness.

[0034] By adopting the above technical solution, connection holes and / or wire harness fixing structures can be flexibly set on the cover to meet the installation requirements of electrical components.

[0035] In some embodiments, the cover is provided with a plurality of reinforcing ribs.

[0036] By setting multiple reinforcing ribs on the cover, the structural strength and rigidity of the cover can be improved, the load-bearing capacity of the cover can be improved, and the stability and durability of the battery device under different usage conditions can be improved; the cover can be a die-cast cover, and the structural flexibility of the die-cast cover allows for the flexible setting of multiple reinforcing ribs.

[0037] In some embodiments, the cover is provided with a lifting structure.

[0038] By setting up a lifting structure on the cover, the cover assembly can be lifted by lifting equipment, thus improving the assembly efficiency of the battery device.

[0039] An embodiment of the second aspect of this application provides an electrical device including a battery device as provided in any embodiment of the first aspect.

[0040] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the structure of a battery cell provided in an embodiment of this application;

[0045] Figure 4 This is a perspective view of the top cover assembly provided in one embodiment of this application;

[0046] Figure 5 yes Figure 4 A partial schematic diagram of the upper cover assembly shown;

[0047] Figure 6 yes Figure 4 An exploded 3D view of the upper cover assembly shown.

[0048] Figure 7 yes Figure 4 A three-dimensional schematic diagram of the upper cover assembly from another angle;

[0049] Figure 8 yes Figure 7 A partial schematic diagram of the upper cover assembly shown;

[0050] Figure 9 yes Figure 7 The top view of the top cover assembly is shown.

[0051] The meanings of the reference numerals in the attached figures are as follows:

[0052] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 11, Housing Body; 12, Cover Assembly; 121, Cover; 1211, First Protrusion; 1212, Second Protrusion; 1213, Reinforcing Rib; 1214, First Maintenance Window; 1215, Second Maintenance Window; 1216, Connection Hole; 1217, Wiring Harness Fixing Structure; 122, High-Voltage Electrical Components; 1221, High-Voltage Box; 1221a, First High-Voltage Box; 1221b, Second High-Voltage Box; 1222, High-Voltage Connector; 1223, High-Voltage Brake; 1224 1226. Connecting plate; 1227. Main positive connection; 1228. Main negative connection; 123. Low-voltage electrical components; 1231. Battery management unit; 1232. Low-voltage connector; 1233. Low-voltage wiring harness; 1234. Monitoring module; 124. Adapter connector; 125. First thermal management component; 1251. First heat exchange section; 1252. Second heat exchange section; 1253. Connection section; 1254. Medium inlet; 1255. Medium outlet; 126. Fixed bracket; 127. Fixed column; 128. Lifting structure; 129. Fastener; 20. Battery cell assembly; 21. Battery cell. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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).

[0059] 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.

[0060] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0061] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0062] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0063] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0064] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0065] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0066] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0067] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0068] 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 widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0069] A battery typically consists of individual battery cells and a casing. The battery cells are placed inside the casing, which provides space for them and offers some protection. The individual battery cells are the components where the actual electrochemical reactions occur.

[0070] As the energy storage system of new energy electric vehicles, the battery not only integrates multiple battery cells, but also important electrical components such as the battery management system, low-voltage wiring harness, high-voltage box, and bracket. These electrical components occupy the enclosure space, and within the limited enclosure space, the installation space for electrical components is small, making assembly and maintenance inconvenient.

[0071] Based on the above considerations, one or more embodiments of this application provide a battery device, including a housing body, a battery cell assembly, and a cover assembly. The cover assembly includes a cover, a high-voltage electrical component, and a low-voltage electrical component. The cover is fitted onto the housing body and has a receiving space inside. The high-voltage electrical component and the low-voltage electrical component are fixedly connected to the cover and at least partially disposed within the receiving space. The high-voltage electrical component includes a high-voltage box and a high-voltage connector electrically connected to the high-voltage box. The low-voltage electrical component includes a battery management unit, a low-voltage connector, and a low-voltage wiring harness. The low-voltage connector is electrically connected to the battery management unit through the low-voltage wiring harness.

[0072] The battery device provided in this application integrates high-voltage electrical components and low-voltage electrical components on the cover, saving space in the main body of the box. Furthermore, the high-voltage electrical components and low-voltage electrical components can be directly assembled on the cover, providing a large operating space and convenient assembly, thus improving the convenience of assembling and maintaining electrical components.

[0073] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. For ease of explanation, the following embodiments use a vehicle as an example of an electrical device according to one embodiment of this application.

[0074] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in one embodiment 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 device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0075] 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.

[0076] refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in one embodiment of this application. Figure 3 This is a schematic diagram of the structure of a battery cell 21 provided in one embodiment of this application. The battery apparatus mentioned in the embodiments of this application may include multiple battery cell assemblies 20 for providing voltage and capacity. A battery cell assembly may include multiple battery cells 21, which are connected in series, parallel, or mixed connections through a busbar.

[0077] In some embodiments, the battery cell assembly 20 is typically formed by arranging multiple battery cells 21; as an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing multiple battery cells 21 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 21 together with cable ties.

[0078] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed within the housing 10.

[0079] As an example, the battery cell assembly 20 can be a battery module, which can be housed in the housing by fixing the battery module in the housing 10.

[0080] As an example, the battery cell assembly 20 can also be housed in the housing 10 by directly fixing multiple battery cells 21 to the housing 10.

[0081] As an example, the housing 10 may include a first part and a second part. The first part and the second part are fastened together to form a closed receiving cavity inside the housing 10 to house the battery cell assembly 20. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0082] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms a closed receiving cavity to house the battery cell assembly 20.

[0083] As an example, the housing 10 may include a housing body 11 and a cover 121. The housing body 11 is used to accommodate battery cell assemblies, and the cover 121 is fitted onto the housing body 11, forming a closed receiving cavity inside the housing 10. The housing body 11 may be a first part of the housing 10, and the cover 121 may be a second part of the housing 10. The housing body 11 may include a frame and a bottom plate, and the cover 121 is the top cover of the housing 10. The top cover and the bottom plate are respectively connected to the frame, forming a closed receiving cavity inside the housing 10.

[0084] As an example, the housing 10 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the housing 10 can be at least part of the floor of the vehicle 1000, or the frame of the housing 10 can be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0085] The battery cell 21 refers to the smallest unit that makes up the battery device 100. The battery cell 21 includes a housing 211, an end cap 212, an electrode assembly 213, and an electrolyte. The electrode assembly 213 and the electrolyte are both contained within the housing 211.

[0086] The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 213, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. An opening can be provided on the housing 211, and the end cap 212 can be used to close the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 212 and the housing 211 can be integrated. Specifically, the end cap 212 and the housing 211 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 211, the end cap 212 closes the housing 211. The housing 211 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic. This application embodiment does not impose any special limitations on this. The end cap 212 may be equipped with functional components such as electrode terminals 214 and pressure relief mechanism 215.

[0087] Electrode assembly 213 is the component in the battery cell 21 where the electrochemical reaction occurs. The casing 211 may contain one or more electrode assemblies 213. The electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 213, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 214 to form a current loop.

[0088] Please refer to Figure 2 , Figures 4 to 9 The first aspect of this application provides a battery device 100, including a housing body 11, a battery cell assembly 20, and a cover assembly 12. The cover assembly 12 includes a cover 121, a high-voltage electrical component 122, and a low-voltage electrical component 123. The cover 121 covers the housing body 11 and has a receiving space inside. The high-voltage electrical component 122 and the low-voltage electrical component 123 are fixedly connected to the cover 121 and are at least partially disposed in the receiving space. The high-voltage electrical component 122 includes a high-voltage box 1221 and a high-voltage connector 1222 electrically connected to the high-voltage box 1221. The high-voltage box 1221 is electrically connected to the battery cell assembly 20. The low-voltage electrical component 123 includes a battery management unit 1231, a low-voltage connector 1232, and a low-voltage wiring harness 1233. The battery management unit 1231 is electrically connected to the battery cell assembly 20, and the low-voltage connector 1232 is electrically connected to the battery management unit 1231 through the low-voltage wiring harness 1233.

[0089] The number of battery cell assembly 20 can be one or more; the battery cell assembly 20 includes multiple battery cells 21, which are connected in series, parallel or mixed through a busbar component.

[0090] The box body 11 and the cover 121 are two parts of the box body 10. The box body 11 can be the first part of the box body 10, and the cover 121 can be the second part of the box body 10. The box body 11 may include a frame and a bottom plate, and the cover 121 is the top cover of the box body 10. The top cover and the bottom plate are respectively connected to the frame, so that the inside of the box body 10 forms a closed receiving cavity.

[0091] The box body 11 has an internal receiving groove for accommodating the battery cell assembly 20, and one end of the box body 11 is open. The cover 121 is closed on the box body 11, so that the inside of the box body 10 forms a closed receiving cavity to accommodate the battery cell assembly 20.

[0092] The cover 121 has a receiving space inside, which can accommodate at least a portion of the high-voltage electrical components 122 and the low-voltage electrical components 123. The receiving space is formed inside the cover 121 in various ways. For example, the cover 121 is a tray-shaped cover 121 with one end open, and the cover 121 has a receiving groove communicating with the opening, the interior of the receiving groove forming the receiving space; for example, the cover 121 has at least one protrusion, the bottom of the protrusion protruding towards the side opposite to the box body 11, the interior of the protrusion forming the receiving space; for example, the cover 121 has both a receiving groove and a protrusion, the interiors of the receiving groove and the protrusion simultaneously forming the receiving space.

[0093] The high-voltage electrical component 122 and the low-voltage electrical component 123 are at least partially housed within the receiving space. It is understood that, in order to reduce the space occupied by electrical components, the dispersed envelope space within the battery device 100 can be flexibly utilized to effectively install electrical components such as the high-voltage box 1221 and the battery management unit 1231 within the receiving space of the cover 121.

[0094] The high-voltage electrical component 122 is used to form the high-voltage system of the battery device 100. In some embodiments, the high-voltage electrical component 122 includes a high-voltage box 1221 and a high-voltage connector 1222, which are core components for high-voltage energy transmission and distribution. The high-voltage box 1221 and the high-voltage connector 1222 are respectively fixedly connected to the cover 121.

[0095] The high-voltage box 1221 (Power Distribution Unit, PDU) is a component that plays a role in power distribution and management. It is responsible for receiving the high-voltage DC power output from the battery cell assembly 20 and intelligently distributing it to the high-voltage loads of the vehicle. The high-voltage box 1221 can integrate multiple protection functions, such as overvoltage protection, overcurrent protection, and short-circuit protection, to ensure the safe operation of the devices and circuits connected to it. Optionally, the high-voltage box 1221 can be completely housed within the housing space; of course, if the high-voltage box 1221 is large, it can also be partially housed within the housing space. The high-voltage box 1221 is electrically connected to the battery cell assembly 20, and the high-voltage connector 1222 is electrically connected to the high-voltage box 1221 to form a high-voltage circuit, distributing the energy of the battery cell assembly 20 to the load.

[0096] The high-voltage connector 1222 is a component that connects the battery device 100 to external high-voltage components (such as a motor controller or a DC charging port). The high-voltage connector 1222 has multiple connection ports, which are located on the side of the cover 121 opposite to the housing body 11.

[0097] The low-voltage electrical component 123 is used to form the low-voltage system of the battery device 100. In some embodiments, the low-voltage electrical component 123 includes a battery management unit 1231, a low-voltage connector 1232, and a low-voltage wiring harness 1233. The battery management unit 1231, the low-voltage connector 1232, and the low-voltage wiring harness 1233 are respectively fixedly connected to the cover 121 and are at least partially disposed within the receiving space.

[0098] The Battery Management Unit (BMU) 1231 is used for data processing, control strategies, and safety protection. It is primarily responsible for monitoring, managing, and controlling the battery device 100. The BMU may include a main control chip, memory, communication interface, drive circuit, and data acquisition circuit. The main control chip is its core, responsible for running control algorithms and processing data. The memory stores relevant parameters and historical data of the battery device 100. The communication interface, such as a CAN bus interface, is used to communicate with external devices such as the vehicle controller. The drive circuit controls the on / off state of actuators such as relays. The data acquisition circuit acquires information such as voltage, current, and temperature of the battery device 100. Optionally, the BMU 1231 may be entirely housed within the receiving space, meaning it does not protrude from the surface of the cover 121. Alternatively, it may be partially housed within the receiving space. The BMU 1231 is electrically connected to the battery cell assembly 20, and it monitors the status of the battery cell assembly 20 and ensures safety.

[0099] The low-voltage connector 1232 is mainly used to transmit control signals, sensor signals, and low-voltage power from the battery device 100. By integrating the low-voltage connector 1232 onto the cover 121, the low-voltage connector 1232 can be disassembled and replaced along with other electrical components. Compared to placing the low-voltage connector 1232 on the housing body 11, the cover assembly 12 can be directly replaced without separately disassembling the low-voltage connector 1232.

[0100] The low-voltage wiring harness 1233 includes multiple low-voltage wires and can be used for signal transmission, control commands, and low-voltage power supply. The low-voltage connector 1232 is electrically connected to the battery management unit 1231 via the low-voltage wiring harness 1233. Optionally, the cover 121 is provided with a wiring harness bundling structure for securing the low-voltage wiring harness 1233. By integrating the low-voltage wiring harness 1233 onto the cover 121, the low-voltage wiring harness 1233 can be disassembled and replaced along with other electrical components.

[0101] When assembling the battery assembly 100, the high-voltage electrical component 122 and the low-voltage electrical component 123 are fixedly connected to the cover 121, and the high-voltage electrical component 122 and the low-voltage electrical component 123 are at least partially accommodated within the accommodating space of the cover 121, forming an integral cover assembly 12; the battery cell assembly 20 is fixed inside the housing body 11; the cover assembly 12 is then placed on the housing body 11, and the battery cell assembly 20 is electrically connected to the high-voltage electrical component 122 and the low-voltage electrical component 123. It is understood that after assembling the cover assembly 12, the battery cell assembly 20 can also be connected to the high-voltage electrical component 122 and the low-voltage electrical component 123 first, and then the cover 121 can be locked onto the housing body. Since both the high-voltage electrical component 122 and the low-voltage electrical component 123 are installed in the cover 121, the problem of inconvenient assembly of electrical components such as the high-voltage box 1221 and the battery management unit 1231 within a limited space is solved.

[0102] When the battery device 100 needs maintenance, first disconnect the electrical connection between the battery cell assembly 20 and the high-voltage electrical assembly 122 and the low-voltage electrical assembly 123, and then remove the cover assembly 12 from the box body 11 as a whole. The cover assembly 12 can be replaced as a whole, or individual electrical components on the cover assembly 12 can be replaced.

[0103] In the battery device 100 provided in this application embodiment, the high-voltage electrical component 122 and the low-voltage electrical component 123 are fixedly connected to the cover 121 and at least partially disposed within the accommodating space of the cover 121. That is, the high-voltage electrical component 122 and the low-voltage electrical component 123 are integrated on the cover 121 to form the cover assembly 12. The cover assembly 12 can be disassembled and installed separately. Electrical components such as the high-voltage box 1221 and the battery management unit 1231 can also be replaced separately. The disassembly and installation of electrical components can obtain a large operating space, which is convenient for assembly. The aforementioned battery device 100 can reduce the space occupied by electrical components within the housing body 11 and facilitate the assembly of electrical components, solving the problem that electrical components such as the high-voltage box 1221 and the battery management unit 1231 are inconvenient to assemble within the limited space of the housing body 10, thus improving the installation efficiency of the battery device 100. By integrating the high-voltage electrical components 122 and the low-voltage electrical components 123 on the cover 121 and at least partially accommodating them within the cover 121, while installing the battery cell assembly 20, which occupies the largest space, within the housing body 11, it is beneficial to improve the energy density of the battery device 100.

[0104] In the aforementioned battery device 100, since the high-voltage box 1221, high-voltage connector 1222, battery management unit 1231, low-voltage connector 1232, and low-voltage wiring harness 1233 are all located on the cover 121, the cover assembly 12 can be installed and removed independently. This allows for the assembly of these electrical components without power, and eliminates the need for related high-voltage safety protection. When repairing or replacing electrical components such as the high-voltage box 1221, high-voltage connector 1222, battery management unit 1231, and low-voltage connector 1232, the high-voltage and low-voltage circuits of the battery device 100 can be disconnected first. This eliminates the need to place the entire battery device 100 in a high-voltage protection environment, improving the safety of maintenance operations, significantly simplifying the maintenance process, shortening maintenance time, and reducing the workload of operators. Furthermore, this design can also reduce maintenance costs and improve maintenance efficiency to a certain extent, thus providing great convenience for the daily maintenance and management of the battery device 100.

[0105] In some embodiments, one or more of the high-voltage box 1221, high-voltage connector 1222, battery management unit 1231, low-voltage connector 1232 and low-voltage wiring harness 1233 are detachably connected to the cover 121.

[0106] Optionally, the high-voltage box 1221, high-voltage connector 1222, battery management unit 1231, low-voltage connector 1232 and low-voltage wiring harness 1233 are detachably connected to the cover 121.

[0107] Optionally, the high-voltage box 1221, high-voltage connector 1222, battery management unit 1231, and low-voltage connector 1232 are detachably connected to the cover 121 by fasteners such as bolts 129, and the low-voltage wiring harness 1233 is detachably connected to the cover 121 by a fixing structure such as a wiring harness fixing buckle.

[0108] It is understood that the aforementioned electrical components can also be detachably connected to the cover 121 by means of snap-fit ​​or other methods.

[0109] By adopting the above technical solution, one or more of the high-voltage box 1221, high-voltage connector 1222, battery management unit 1231, low-voltage connector 1232 and low-voltage wiring harness 1233 can be disassembled and replaced individually, improving the convenience of maintaining the battery device 100.

[0110] In some embodiments, the high-voltage box 1221 is provided with a sampling harness inside, and the sampling harness is electrically connected to the battery management unit 1231 through the low-voltage harness 1233.

[0111] During assembly, the high voltage box 1221 and the battery management unit 1231 are first fixedly connected to the cover 121, and then the high voltage box 1221 and the battery management unit 1231 are electrically connected using the low voltage wiring harness 1233, so that the high voltage box 1221 and the battery management unit 1231 can be electrically connected.

[0112] Since the high-voltage box 1221, low-voltage wiring harness 1233, and battery management unit 1231 are all fixedly connected to the cover 121, the sampling wiring harness inside the high-voltage box 1221 can be easily electrically connected to the battery management unit 1231 through the low-voltage wiring harness 1233 to transmit the sampling signal of the high-voltage box 1221 to the battery management unit 1231. When the high-voltage box 1221 needs maintenance or replacement, there is no need to replace or adjust the original wiring harness of the battery device 100. It is only necessary to disconnect the electrical connection between the high-voltage box 1221 and the battery cell assembly 20 to disassemble and replace the entire high-voltage box 1221. This achieves the effect of simplifying the maintenance process and improving maintenance efficiency. This modular design makes the maintenance of the high-voltage box 1221 more convenient and helps to improve the reliability and safety of the battery device 100.

[0113] Furthermore, the aforementioned cover assembly 12 includes a high-voltage electrical component 122 and a low-voltage electrical component 123. The sampling harness of the high-voltage box 1221 is connected to the battery management unit 1231 via the low-voltage harness 1233, enabling the cover assembly 12 to normally acquire high-voltage signals. Additionally, the battery management unit 1231 is connected to a low-voltage connector 1232, allowing it to acquire low-voltage signals and transmit them externally via the low-voltage connector 1232, enabling the cover assembly 12 to normally acquire low-voltage signals. The aforementioned cover assembly 12 can operate independently of the battery cell assembly 20; even when powered by other power sources, the cover assembly 12 can still normally acquire both high-voltage and low-voltage signals.

[0114] In some embodiments, the cover assembly 12 further includes an adapter connector 124 for connecting the sampling harness and the low-voltage harness 1233.

[0115] The adapter connector 124 is a key intermediate node in the electrical system. It can be used to achieve segmented connection of wire harnesses, lossless signal connection, or interface protocol conversion. The housing of the adapter connector 124 has multiple insertion parts for inserting wire harnesses. Different wire harnesses can be inserted into the adapter connector 124 simultaneously to achieve electrical connection through the adapter connector 124.

[0116] The sampling harness inside the high-voltage box 1221 is connected to the adapter connector 124, and the adapter connector 124 is connected to the low-voltage harness 1233, thereby enabling the sampling harness to be electrically connected to the battery management unit 1231 through the adapter connector 124 and the low-voltage harness 1233.

[0117] By adopting the above technical solution, when it is necessary to disassemble the high voltage box 1221, the connection between the high voltage box 1221 and the battery management unit 1231 can be disconnected through the adapter connector 124, which facilitates the individual disassembly and replacement of the high voltage box 1221.

[0118] Optionally, the low-voltage connector 1232 can also be electrically connected to the battery management unit 1231 via a corresponding adapter connector 124 and low-voltage wiring harness 1233.

[0119] Please refer to Figures 2 to 7 In some embodiments, the cover 121 has a first protrusion 1211 and a second protrusion 1212 at both ends along its length, and the accommodating space includes a first accommodating area located in the first protrusion 1211 and a second accommodating area located in the second protrusion 1212; the high voltage box 1221 includes a first high voltage box 1221a and a second high voltage box 1221b, the first high voltage box 1221a is located in the first accommodating area, the second high voltage box 1221b and the battery management unit 1231 are located in the second accommodating area, and the first high voltage box 1221a and the second high voltage box 1221b are electrically connected through a high voltage switch 1223.

[0120] Optionally, the cover 121 is rectangular or approximately rectangular, such as Figure 4 As shown, the length direction of the cover 121 is... Figure 4 In the X direction, the width direction of the cover 121 is... Figure 4 In the Y direction, the thickness direction of the cover 121 is... Figure 4 The Z direction in the equation.

[0121] The first protrusion 1211 protrudes towards the side opposite to the box body 11, forming a first receiving area inside the first protrusion 1211; the second protrusion 1212 also protrudes towards the side opposite to the box body 11, forming a second receiving area inside the second protrusion 1212. Viewed from the side of the battery device 100 where the cover 121 is provided, the first protrusion 1211 and the second protrusion 1212 have a convex-convex structure.

[0122] In this embodiment, the high-voltage box 1221 is divided into two parts to maximize space utilization. The first high-voltage box 1221a and the second high-voltage box 1221b together fulfill the function of the high-voltage box 1221. The first high-voltage box 1221a and the second high-voltage box 1221b are respectively fixedly connected to the cover 121, and are electrically connected via a high-voltage switch 1223. Optionally, the first high-voltage box 1221a is located at the front end of the battery device 100, and the second high-voltage box 1221b is located at the rear end of the battery device 100. When the battery device 100 is installed in a vehicle, the front end of the battery device 100 is close to the front end of the vehicle, and the rear end of the battery device 100 is close to the rear end of the vehicle.

[0123] Optionally, the sampling harness in the first high-voltage box 1221a is electrically connected to the battery management unit 1231 via the low-voltage harness 1233, and the sampling harness in the second high-voltage box 1221b is also electrically connected to the battery management unit 1231 via the low-voltage harness 1233.

[0124] Optionally, the battery management unit 1231 is also located in the second housing area.

[0125] By adopting the above technical solution, the high-voltage box 1221 includes a first high-voltage box 1221a and a second high-voltage box 1221b. The first high-voltage box 1221a and the second high-voltage box 1221b are located in different accommodating areas, which can flexibly utilize the accommodating space inside the cover 121 to accommodate the high-voltage box 1221, solving the problem that the high-voltage box 1221 is inconvenient to accommodate due to its large size. The first high-voltage box 1221a and the second high-voltage box 1221b are set separately and can be disassembled individually, further improving the convenience of maintaining the high-voltage box 1221.

[0126] In some embodiments, the cover 121 is provided with high-voltage connectors 1222 at opposite ends along its length, and the first high-voltage box 1221a and the second high-voltage box 1221b are electrically connected to the corresponding high-voltage connectors 1222.

[0127] like Figure 7 As shown, the high-voltage connector 1222 includes multiple output interfaces, which can be used to connect copper bars or high-voltage wire harnesses respectively. The first high-voltage box 1221a and the corresponding high-voltage connector 1222 are located at one end of the cover 121 along its length, and the second high-voltage box 1221b and the corresponding high-voltage connector 1222 are located at the other end of the cover 121 along its length, which facilitates connecting the first high-voltage box 1221a and the second high-voltage box 1221b to the corresponding high-voltage connector 1222 respectively.

[0128] By adopting the above technical solution, the first high-voltage box 1221a and the second high-voltage box 1221b are respectively electrically connected to the corresponding high-voltage connector 1222, and both the first high-voltage box 1221a and the second high-voltage box 1221b can transmit high-voltage electrical energy to the high-voltage component through the corresponding high-voltage connector 1222.

[0129] In some embodiments, the first high-voltage box 1221a and / or the second high-voltage box 1221b are respectively connected to the corresponding high-voltage connector 1222 via the connecting bar 1224.

[0130] The connecting plate 1224 can be made of copper, but it is understood that it can also be made of aluminum or other materials. The connecting plate 1224 connected to the first high-voltage box 1221a is located in the first receiving area, and the connecting plate connected to the second high-voltage box 1221b is located in the second receiving area, thus saving the space occupied by the connecting plate 1224.

[0131] By adopting the above technical solution, the first high-voltage box 1221a achieves a rigid electrical connection with the high-voltage connector 1222 through the connecting plate 1224, and / or the second high-voltage box 1221b achieves an electrical connection with the high-voltage connector 1222 through the connecting plate 1224. The connecting plate 1224 is a rigid direct connection without intermediate terminals, which reduces contact resistance. Furthermore, the connecting plate 1224 has a long mechanical life and good reliability.

[0132] Please refer to Figures 4 to 6 In some embodiments, the cover assembly 12 further includes a first thermal management component 125 detachably connected to the cover 121. The first thermal management component 125 has a heat exchange channel for the flow of heat exchange medium and is used to exchange heat with the first high-pressure box 1221a and the second high-pressure box 1221b.

[0133] The first thermal management component 125 can be detachably connected to the cover 121 by means of fasteners 129, snap-fit, etc. The first thermal management component 125 is set independently for easy replacement.

[0134] The first thermal management component 125 has internal heat exchange channels for the flow of heat exchange medium. The heat exchange medium refers to the medium in the heat exchange plate used for heat exchange with the high-pressure box 1221. The heat exchange medium can include liquid, gaseous, or solid-liquid mixtures; it can also include a coolant, for example, a fluorinated coolant, or a liquid coolant, such as water or an aqueous ethylene glycol solution. The first thermal management component 125 can heat and cool the high-pressure box 1221 to regulate its operating temperature.

[0135] The first thermal management component 125 can be a plate. The first thermal management component 125 can be fitted with the first high-pressure box 1221a and the second high-pressure box 1221b, resulting in better heat exchange effect.

[0136] The battery device 100 also includes a second thermal management component for heat exchange with the battery cell assembly 20. The second thermal management component also has internal heat exchange channels. Optionally, the heat exchange channels in the first thermal management component 125 and the second thermal management component are arranged in parallel, meaning that the first thermal management component 125 and the second thermal management component are supplied with heat exchange medium independently and do not affect each other. It is understood that in other embodiments, the heat exchange channels in the first thermal management component 125 and the second thermal management component may also be arranged in series.

[0137] When the high-voltage box 1221 is working, its operating temperature will rise, and temperature rise control affects the safety of the high-voltage system. By setting up a first thermal management component 125, the high-voltage box 1221 can be cooled independently, reducing the risk of electrical performance degradation and mechanical structure failure caused by excessive temperature of the high-voltage box 1221, and improving the reliability of the battery device 100.

[0138] In some embodiments, a first thermal management component 125 is disposed on the side of the high-voltage box 1221 away from the cover 121. The first thermal management component 125 includes a first heat exchange portion 1251, a second heat exchange portion 1252, and a connecting portion 1253. The heat exchange channel extends simultaneously within the first heat exchange portion 1251, the connecting portion 1253, and the second heat exchange portion 1252. The first heat exchange portion 1251 is attached to the first high-voltage box 1221a, the second heat exchange portion 1252 is attached to the second high-voltage box 1221b, and the connecting portion 1253 connects the first heat exchange portion 1251 and the second heat exchange portion 1252. The low-voltage wiring harness 1233 is arranged side by side with the connecting portion 1253.

[0139] The first thermal management component 125 is disposed on one side of the high voltage box 1221 along the thickness direction of the cover 121, and the first thermal management component 125 is disposed on the side of the high voltage box 1221 away from the cover 121, that is, the first thermal management component 125 is disposed between the high voltage box 1221 and the battery cell assembly 20; the first thermal management component 125 and the high voltage box 1221 are disposed along the thickness direction of the cover 121, and are at least partially accommodated in the accommodating space of the cover 121, which can make reasonable use of the space inside the box 10 and reduce the space occupied by the first thermal management component 125.

[0140] The first heat exchange section 1251 is attached to the first high-pressure box 1221a. Optionally, the orthographic projection of the first high-pressure box 1221a toward the cover 121 falls entirely within the orthographic projection of the first heat exchange section 1251 toward the cover 121, that is, the first heat exchange section 1251 can completely cover the first high-pressure box 1221a; of course, the first heat exchange section 1251 may also only cover part of the first high-pressure box 1221a.

[0141] The second heat exchange section 1252 is attached to the second high-pressure box 1221b. Optionally, the orthographic projection of the second high-pressure box 1221b toward the cover 121 falls entirely within the orthographic projection of the second heat exchange section 1252 toward the cover 121, that is, the second heat exchange section 1252 can completely cover the second high-pressure box 1221b; of course, the second heat exchange section 1252 may also only cover part of the second high-pressure box 1221b.

[0142] The connecting part 1253 is connected between the first heat exchange part 1251 and the second heat exchange part 1252. The heat exchange flow channel can extend from the first heat exchange part 1251 to the connecting part 1253 and then to the second heat exchange part 1252.

[0143] The first thermal management component 125 also includes a medium inlet 1254 for the inflow of heat exchange medium and a medium outlet 1255 for the outflow of heat exchange medium. Thus, the heat exchange medium flows into the heat exchange channel from the medium inlet 1254 and flows out from the medium outlet 1255, forming a circulating flow path. The structure of the heat exchange channel is relatively simple. Optionally, the medium inlet 1254 and the medium outlet 1255 are located in the first heat exchange section 1251.

[0144] The low-voltage wiring harness 1233 and the connecting part 1253 are arranged side by side. Optionally, both the connecting part 1253 and the low-voltage wiring harness 1233 extend along the length direction of the cover 121.

[0145] The structure of the first thermal management component 125 provided in this embodiment is compatible with the structure of the high-pressure box 1221, and can achieve good heat exchange effect in a limited space.

[0146] In some embodiments, multiple battery cell assemblies 20 form a battery module, the battery module having a total positive output terminal (not shown) and a total negative output terminal (not shown); the high voltage box 1221 has a total positive connection portion 1226 and a total negative connection portion 1227 for electrical connection to the battery module, the total positive connection portion 1226 is used to connect to the total positive output terminal, and the total negative connection portion 1227 is used to connect to the total negative output terminal; the cover 121 has a first maintenance window 1214 for exposing the total positive connection portion 1226 and the total negative connection portion 1227.

[0147] There are multiple battery cell modules 20, which are connected in series and / or in parallel and configured as a battery module. The entire battery module forms a total positive output terminal and a total negative output terminal for outputting voltage to the outside.

[0148] The high-voltage box 1221 is provided with a main positive connection 1226 and a main negative connection 1227. The main positive connection 1226 is used to connect to the main positive output terminal of the battery module, and the main negative connection 1227 is used to connect to the main negative output terminal of the battery module. The high-voltage box 1221 contains multiple components, including a relay for controlling the on / off state of the circuit. The high-voltage box 1221 can be electrically connected to an external charging interface for charging and discharging the battery device 100. By electrically connecting the main positive output terminal to the main positive connection 1226 and the main negative output terminal to the main negative connection 1227, the high-voltage circuit can be turned on; by disconnecting the electrical connection between the main positive output terminal and the main positive connection 1226 and the main negative output terminal and the main negative connection 1227, the high-voltage circuit can be turned off.

[0149] The cover 121 is provided with a first maintenance window 1214, which is used to expose the main positive connection part 1226 and the main negative connection part 1227. The first maintenance window 1214 is provided with a removable cover plate, which can expose the main positive connection part 1226 and the main negative connection part 1227 by removing the cover plate.

[0150] When it is necessary to install or remove electrical components such as the high-voltage box 1221, high-voltage connector 1222, and low-voltage connector 1232, the main positive connection 1226 and the main negative connection 1227 are exposed through the first maintenance window 1214. By disconnecting the electrical connection between the main positive output terminal and the main positive connection 1226, and disconnecting the electrical connection between the main negative output terminal and the main negative connection 1227, the high-voltage connection can be completely disconnected, avoiding safety hazards caused by residual high voltage. This allows operators to complete the replacement of the high-voltage box 1221 and the high and low voltage connectors 1232 more conveniently and safely.

[0151] By adopting the above technical solution, operators can disconnect and connect the high-voltage connection through the first maintenance window 1214, which not only significantly improves the safety of the battery device 100 during the replacement of the high-voltage box 1221 and the high and low voltage connectors 1232, but also reduces the operational risks during after-sales maintenance and repair, further ensuring the safety of the entire vehicle.

[0152] In some embodiments, the battery device 100 further includes a module low-voltage wiring harness (not shown) electrically connected to the battery module, the module low-voltage wiring harness being used for electrical connection with the battery management unit; a second maintenance window 1215 is provided on the cover 121, the second maintenance window 1215 is disposed opposite to the battery management unit 1231, the second maintenance window 1215 being used to expose the connection between the module low-voltage wiring harness and the battery management unit 1231.

[0153] The module low-voltage harness is a dedicated signal harness inside the battery pack that connects the battery module to the battery management unit 1231, responsible for transmitting key parameters such as cell voltage and temperature. One end of the module low-voltage harness is connected to the battery module, and the other end is connected to the battery management unit 1231. Optionally, the end of the module low-voltage harness is plugged into a port of the battery management unit 1231 via a connector.

[0154] When electrical components need to be repaired, the connection between the module low-voltage wiring harness and the battery management unit 1231 is exposed through the second maintenance window 1215, so that the connection between the module low-voltage wiring harness and the battery management unit 1231 can be disconnected through the second maintenance window 1215, thereby disconnecting the low-voltage circuit of the battery device 100; after the repair, the module low-voltage wiring harness and the battery management unit 1231 can be electrically reconnected through the second maintenance window 1215.

[0155] By setting up a second maintenance window 1215, operators can easily disconnect and connect low-voltage connections during maintenance and disassembly, ensuring that the low-voltage lines remain in a safe state throughout the disassembly and assembly process. This not only improves the safety of battery pack disassembly and assembly but also provides a higher level of safety for subsequent after-sales maintenance and repair operations.

[0156] Meanwhile, the cover assembly 12 provided in this application embodiment is provided with a reasonable high and low voltage connection path, which allows the high voltage circuit and low voltage circuit to be connected after the cover assembly 12 is assembled without a maintenance switch. The cover assembly 12 is provided with a first maintenance window 1214 and a second maintenance window 1215, which allows operators to easily disconnect the high voltage circuit and low voltage circuit of the battery device 100 during maintenance and disassembly. This enables the assembly of components such as the high voltage box 1221, high voltage connector 1222, low voltage connector 1232, battery management unit 1231, and low voltage wiring harness 1233 without power, and without the need for related high voltage safety protection. The high and low voltage lines are always in a safe state during the disassembly and assembly process, reducing the risk of high voltage safety accidents caused by accidental contact or operational errors. The cover assembly 12 and the battery device 100 not only improve the safety of the battery device 100 during disassembly and assembly, but also provide higher safety assurance for subsequent after-sales maintenance and repair operations.

[0157] In other embodiments, a maintenance switch may be provided on the battery device 100. The maintenance switch can disconnect and connect the high and low voltage connections. In this case, the first maintenance window 1214 and the second maintenance window 1215 can be omitted.

[0158] In other embodiments, the first maintenance window 1214 and the second maintenance window 1215 may also be combined into one maintenance window.

[0159] In some embodiments, the main positive connection portion 1226 and the main negative connection portion 1227 are disposed on the first high voltage box 1221a, the first maintenance window 1214 is disposed on the side of the first protrusion 1211 away from the box body 11, and the first maintenance window 1214 is disposed opposite to the first high voltage box 1221a; the second maintenance window 1215 is disposed on the second protrusion 1212.

[0160] The first high-voltage box 1221a is located inside the first protrusion 1211. The main positive connection 1226 and the main negative connection 1227 are located in the first high-voltage box 1221a. The first maintenance window 1214 is located on the side of the first protrusion 1211 away from the box body 11, so that the main positive connection 1226 and the main negative connection 1227 can be exposed through the first maintenance window 1214, making it convenient for operators to disconnect and connect the high-voltage circuit.

[0161] The second high-voltage box 1221b and the battery management unit 1231 are located inside the second protrusion 1212, and the second maintenance window 1215 is located on the second protrusion 1212. Optionally, the second maintenance window 1215 is located on the side of the second protrusion 1212. The second maintenance window 1215 can expose the connection between the battery management unit 1231 and the module wiring harness, making it convenient for operators to disconnect and connect the low-voltage circuit.

[0162] By adopting the above technical solution, the first maintenance window 1214 can directly expose the main positive connection part 1226 and the main negative connection part 1227 on the first high voltage box 1221a, and the second maintenance window 1215 can directly expose the connection between the battery management unit 1231 and the module wiring harness. The first maintenance window 1214 and the second maintenance window 1215 are respectively located at both ends of the cover 121, which reduces the risk of accidental contact or operational errors by the operator and improves the convenience and safety of maintenance.

[0163] In some embodiments, the low-voltage electrical component 123 further includes a monitoring module 1234, which is fixedly connected to the cover 121 and electrically connected to the battery management unit 1231.

[0164] The monitoring module 1234 (Cell Management Circuit, CMC) is a key intermediate layer module between the battery management unit 1231 and the CSC (cell monitoring unit). The monitoring module 1234 can collect data from the battery module and summarize it to the battery management unit 1231. The monitoring module 1234 is fixedly connected to the cover 121. Optionally, the monitoring module 1234 is arranged adjacent to the battery management unit 1231.

[0165] By adopting the above technical solution, the monitoring module 1234 is also integrated on the cover 121, which facilitates the connection of the monitoring module 1234 to the battery management unit 1231.

[0166] Please refer to Figure 7 In some embodiments, the cover 121 is provided with a vehicle wiring harness fixing structure 1217, which includes at least one of a fixing bracket 126 and a fixing post 127.

[0167] The vehicle wiring harness fixing structure 1217 is a structure disposed on the outside of the cover 121 and used to fix the vehicle wiring harness. The vehicle wiring harness fixing structure 1217 can be of various types capable of fixing the wiring harness. In some embodiments, the vehicle wiring harness structure includes at least one of a fixing bracket 126 and a fixing post 127. The fixing bracket 126 can be a sheet metal bracket, and the fixing bracket 126 is fixedly connected to the cover 121. For example... Figure 7 As shown, in some embodiments, the mounting bracket 126 is arranged adjacent to the high-voltage connector 1222 to facilitate the connection of the vehicle wiring harness to the high-voltage connector 1222. The mounting post 127 is generally columnar, and in some embodiments, the mounting post 127 is arranged adjacent to the high-voltage connector 1222.

[0168] By setting a vehicle wiring harness fixing structure 1217 on the cover 121, the function of the cover 121 is improved, making it easier and more stable to connect the vehicle wiring harness to the cover 121.

[0169] In some embodiments, the cover 121 is a die-cast cover 121.

[0170] The cover 121 can be made of aluminum alloy or other materials suitable for die casting. Die casting is a metal casting process with the advantage of precision forming. Applying die casting to the cover 121 gives it the advantage of high integration. Multiple parts can be integrated into the cover 121, including crossbeam / longitudinal beam reinforcement structures, wire harness brackets, mounting bosses (including the first protrusion 1211 and the second protrusion 1212), and holes, which can significantly reduce the number of parts, reduce connection points, simplify the assembly process, and improve the overall structure and rigidity. At the same time, the cover 121 is a die-cast cover 121, which also has high production efficiency, high design freedom, and potential sealing advantages.

[0171] The cover 121 is a die-cast cover 121, which has good mechanical properties and can meet the rigidity and strength requirements of the cover 121. In addition, the cover 121 has the advantage of high integration, which makes it easy to integrate electrical components onto the cover 121.

[0172] In some embodiments, the cover 121 is provided with a plurality of connection holes 1216, and at least one of the high voltage box 1221, the battery management unit 1231, and the low voltage connector 1232 is fixedly connected to the cover 121 by fasteners passing through the connection holes 1216; and / or, the cover 121 is provided with a wire harness fixing structure 1217 for supporting the low voltage wire harness 1233.

[0173] The cover 121 has multiple connection holes 1216 for fasteners such as bolts to pass through. Since the cover 121 is a die-cast cover 121, multiple connection holes 1216 can be manufactured during the forming of the cover 121. Electrical components such as the high-voltage box 1221, battery management unit 1231, and low-voltage connector 1232 can all be fixedly connected to the cover 121 by fasteners passing through the connection holes 1216, making the installation and disassembly of electrical components relatively simple.

[0174] A wire harness fixing structure 1217 can also be provided on the cover 121. The wire harness fixing structure 1217 is used to support the low-voltage wire harness 1233. Since the cover 121 is a die-cast cover 121, the wire harness fixing structure 1217 can be manufactured at the same time as the cover 121 is formed. That is, the wire harness fixing structure 1217 is integrated into the cover 121 by integral molding, eliminating the need for a wire harness bracket, and the structure of the cover 121 is relatively simple. Optionally, the cover 121 is a die-cast cover 121, on which the connection hole 1216 and the wire harness fixing structure 1217 can be conveniently and flexibly provided.

[0175] By adopting the above technical solution, connection holes 1216 and / or wire harness fixing structures 1217 can be flexibly provided on the cover 121 to meet the installation requirements of electrical components.

[0176] In some embodiments, the cover 121 is provided with a plurality of reinforcing ribs 1213. The reinforcing ribs 1213 are provided on the side of the cover 121 facing the battery cell assembly 20, that is, the reinforcing ribs 1213 are provided on the inner surface of the cover 121, and the reinforcing ribs 1213 can improve the structural strength and rigidity of the cover 121.

[0177] Optionally, the reinforcing ribs 1213 include transverse reinforcing ribs 1213 arranged along the width direction of the cover 121 and longitudinal reinforcing ribs 1213 arranged along the length direction of the cover 121, with the transverse reinforcing ribs 1213 and the longitudinal reinforcing ribs 1213 intersecting each other.

[0178] By setting multiple reinforcing ribs 1213 on the cover 121, the structural strength and rigidity of the cover 121 can be improved, the load-bearing capacity of the cover 121 can be improved, and the stability and durability of the battery device 100 under different usage conditions can be improved. The cover 121 can be a die-cast cover 121. By utilizing the structural flexibility of the die-cast cover 121, multiple reinforcing ribs 1213 can be flexibly set.

[0179] In some embodiments, the cover 121 is provided with a lifting structure 128.

[0180] The lifting structure 128 is a structure that can be connected to lifting equipment. Optionally, the lifting structure 128 includes multiple lifting rings. For example, the multiple lifting rings are located at the four corners of the cover 121. It is understood that the lifting structure 128 may also include other lifting structures for use with lifting equipment.

[0181] The cover assembly 12 integrates the cover 121 and multiple electrical components, and the cover assembly 12 is relatively heavy. By setting a lifting structure 128 on the cover 121, the cover assembly 12 can be lifted by lifting equipment, thereby improving the assembly efficiency of the battery device 100.

[0182] Please refer to Figures 2 to 8Some embodiments of this application provide a battery device 100, including a housing body 11, a battery cell assembly 20, and a cover assembly 12. The cover assembly 12 includes a cover 121, a high-voltage electrical component 122, and a low-voltage electrical component 123. The cover 121 covers the housing body 11 and has a receiving space inside. The high-voltage electrical component 122 and the low-voltage electrical component 123 are fixedly connected to the cover 121 and are at least partially disposed within the receiving space. The high-voltage electrical component 122 includes a high-voltage box 1221 and a component electrically connected to the high-voltage box 1221. The high-voltage connector 1222 of 221 and the low-voltage electrical assembly 123 include a battery management unit 1231, a low-voltage connector 1232 and a low-voltage wiring harness 1233. The low-voltage connector 1232 is electrically connected to the battery management unit 1231 through the low-voltage wiring harness 1233. The high-voltage box 1221 has a sampling wiring harness inside, which is electrically connected to the battery management unit 1231 through the low-voltage wiring harness 1233. The cover assembly 12 also includes an adapter connector 124 for connecting the sampling wiring harness and the low-voltage wiring harness 1233. The high-voltage box 1221 includes a first high-voltage box 1221a and a second high-voltage box 1221b. The first high-voltage box 1221a is located inside the first protrusion 1211, and the second high-voltage box 1221b is located inside the second protrusion 1212. The first high-voltage box 1221a and the second high-voltage box 1221b are electrically connected via a high-voltage switch 1223. The cover assembly 12 also includes a first thermal management component 125 detachably connected to the cover 121. The first thermal management component 125 is used for heat exchange with the first high-voltage box 1221a and the second high-voltage box 1221b. The cover 121 is provided with a first maintenance window 1214 and a second maintenance window 1215. The high-voltage connection can be disconnected through the first maintenance window 1214, and the low-voltage connection can be disconnected through the second maintenance window 1215.

[0183] During the assembly of the battery device 100, the top cover assembly must first be accurately fastened to the housing body 11 to ensure a stable and airtight connection. Subsequently, the connection between the high-voltage system and the low-voltage system is completed through the first maintenance window 1214 and the second maintenance window 1215, ultimately achieving complete high and low voltage system integration and realizing the functional integrity and electrical safety of the battery device 100.

[0184] When the battery device 100 needs to be disassembled and maintained, the high and low voltage connections should first be disconnected through the first maintenance window 1214 and the second maintenance window 1215 to ensure the system is in a safe state and avoid safety hazards caused by accidental electric shock or high voltage release. After the disconnection operation is completed, the lower cover assembly 12 can be disassembled.

[0185] The cover 121 integrates various electrical components, including key components such as the high-voltage box 1221 and the battery management unit 1231. Because these electrical components are located within the cover 121, the entire battery device 100 does not need to be placed in a high-voltage protection environment when repairing or replacing components such as the high-voltage box 1221 and the battery management unit 1231. This design not only improves the safety of maintenance operations but also significantly simplifies the maintenance process, shortens maintenance time, and reduces the workload of operators. Furthermore, this design can also reduce maintenance costs and improve maintenance efficiency to a certain extent, thus providing great convenience for the daily maintenance and management of the battery device 100.

[0186] The aforementioned battery device 100 mounts the high-voltage electrical components 122 and low-voltage electrical components 123 on the cover 121, solving the problem of limited installation space and inconvenient assembly for electrical components. The cover assembly 12 can be replaced as a whole, and electrical components such as the high-voltage box 1221, battery management unit 1231, and low-voltage connector 1232 can also be replaced individually, facilitating maintenance. The battery device 100 provided in this application, by incorporating the cover assembly 12, optimizes the manufacturing and maintenance process of the battery device 100, improves the safety and reliability of the battery device 100 during production and after-sales service, thereby enhancing overall product quality and user experience.

[0187] An embodiment of the second aspect of this application provides an electrical device including a battery device 100 as provided in the first aspect, the battery device 100 being used to provide electrical energy.

[0188] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0189] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Box body; The battery cell assembly is located inside the casing; A cover assembly includes a cover, a high-voltage electrical component, and a low-voltage electrical component. The cover fits onto the main body of the enclosure and has a receiving space inside. The high-voltage electrical component and the low-voltage electrical component are fixedly connected to the cover and at least partially disposed within the receiving space. The high-voltage electrical component includes a high-voltage box and a high-voltage connector electrically connected to the high-voltage box, and the high-voltage box is electrically connected to the battery cell assembly. The low-voltage electrical component includes a battery management unit, a low-voltage connector, and a low-voltage wiring harness. The battery management unit is electrically connected to the battery cell assembly, and the low-voltage connector is electrically connected to the battery management unit through the low-voltage wiring harness.

2. The battery device as claimed in claim 1, characterized in that, One or more of the high-voltage box, the high-voltage connector, the battery management unit, the low-voltage connector, and the low-voltage wiring harness are detachably connected to the cover.

3. The battery device as described in claim 1 or 2, characterized in that, The high-voltage box is equipped with a sampling harness, which is electrically connected to the battery management unit through the low-voltage harness.

4. The battery device as claimed in claim 3, characterized in that, The cover assembly also includes an adapter connector for connecting the sampling harness and the low-voltage harness.

5. The battery device according to any one of claims 1-4, characterized in that, The cover has a first protrusion and a second protrusion at both ends along its length, and the accommodating space includes a first accommodating area located in the first protrusion and a second accommodating area located in the second protrusion. The high-voltage box includes a first high-voltage box and a second high-voltage box. The first high-voltage box is located in the first accommodating area, and the second high-voltage box is located in the second accommodating area. The first high-voltage box and the second high-voltage box are electrically connected through a high-voltage switch.

6. The battery device as claimed in claim 5, characterized in that, The cover is provided with high-voltage connectors at opposite ends along its length, and the first high-voltage box and the second high-voltage box are electrically connected to the corresponding high-voltage connectors.

7. The battery device as claimed in claim 6, characterized in that, The first high-voltage box and / or the second high-voltage box are respectively connected to the corresponding high-voltage connector via connecting tabs.

8. The battery device as described in any one of claims 5-7, characterized in that, The cover assembly further includes a first thermal management component detachably connected to the cover. The first thermal management component has a heat exchange channel for the flow of heat exchange medium. The first thermal management component is used for heat exchange with the first high-pressure box and the second high-pressure box.

9. The battery device as claimed in claim 8, characterized in that, The first thermal management component is located on the side of the high-voltage box away from the cover. The first thermal management component includes a first heat exchange section, a second heat exchange section, and a connecting section. The heat exchange channel extends simultaneously within the first heat exchange section, the connecting section, and the second heat exchange section. The first heat exchange section is attached to the first high-voltage box, the second heat exchange section is attached to the second high-voltage box, and the connecting section connects the first heat exchange section and the second heat exchange section. The low-voltage wiring harness is arranged in parallel with the connecting section.

10. The battery device according to any one of claims 1-9, characterized in that, The battery device includes multiple battery cell assemblies, which form a battery module. The battery module is provided with a total positive output terminal and a total negative output terminal. The high-voltage box is provided with a total positive connection part and a total negative connection part. The total positive connection part is used to connect to the total positive output terminal, and the total negative connection part is used to connect to the total negative output terminal. The cover is provided with a first maintenance window, which is used to expose the main positive connection and the main negative connection.

11. The battery device as claimed in claim 10, characterized in that, The battery device further includes a module low-voltage wiring harness electrically connected to the battery module, the module low-voltage wiring harness being used for electrical connection with the battery management unit; The cover is provided with a second maintenance window, which is positioned opposite to the battery management unit. The second maintenance window is used to expose the connection between the module's low-voltage wiring harness and the battery management unit.

12. The battery device according to any one of claims 1-11, characterized in that, The low-voltage electrical components also include a monitoring module, which is fixedly connected to the cover and electrically connected to the battery management unit.

13. The battery device according to any one of claims 1-12, characterized in that, The cover is provided with a vehicle wiring harness fixing structure, which includes at least one of a fixing bracket and a fixing post.

14. The battery device according to any one of claims 1-13, characterized in that, The cover is a die-cast cover.

15. The battery device according to any one of claims 1-14, characterized in that, The cover has multiple connection holes, and at least one of the high-voltage box, the battery management unit, and the low-voltage connector is fixedly connected to the cover by fasteners passing through the connection holes; and / or The cover is provided with a wire harness fixing structure for supporting the low-voltage wire harness.

16. The battery device according to any one of claims 1-15, characterized in that, The cover is provided with multiple reinforcing ribs.

17. The battery device according to any one of claims 1-16, characterized in that, The cover is equipped with a hoisting structure.

18. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-17, the battery device being used to provide electrical energy.

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