Battery device and electric appliance

Abstract

This application relates to a battery device and an electrical appliance. The battery device includes a housing, multiple battery cells, and a connecting assembly. The multiple battery cells are housed within the housing and connected to form a total positive electrode and a total negative electrode. The connecting assembly includes a support, two conductive elements, multiple connectors, and a first sealing element. Each conductive element includes a first conductive portion and two second conductive portions. The first conductive portion is connected to the two second conductive portions and electrically connected to the total positive electrode and the total negative electrode, respectively. The first sealing element is disposed within a channel of a connector. The multiple connectors include two first connectors and two second connectors. The two first connectors are respectively connected to the two second conductive portions of one conductive element, and the two second connectors are respectively connected to the two second conductive portions of another conductive element. The battery device provided in this application achieves a dual-branch design through the connecting assembly, realizing miniaturization and weight reduction.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the development of batteries, how to improve the reliability of battery devices is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] This application provides a battery device and an electrical appliance, which aims to improve the reliability of the battery device to a certain extent.

[0005] In a first aspect, this application proposes a battery device, which includes a housing, multiple battery cells, and a connecting assembly. The multiple battery cells are housed within the housing and are connected to form a total positive electrode and a total negative electrode. The connecting assembly is disposed within the housing. The connecting assembly includes a support, two conductive elements, multiple connectors, and a first seal. A bracket is disposed on the housing, with at least a portion of the bracket disposed on the outside of the housing. Two conductive elements are connected to the bracket. Each conductive element includes a first conductive part and two second conductive parts. The first conductive part is connected to the two second conductive parts. The first conductive parts are electrically connected to the overall positive terminal and the overall negative terminal, respectively. At least a portion of the second conductive parts is located on the outside of the housing. The bracket has at least one first opening, through which the two second conductive parts of each conductive element are exposed. A connector is disposed on the bracket and located on the outside of the housing. The connector has a channel communicating with the first opening. A first sealing element is disposed in the channel. Multiple connectors include two first connectors and two second connectors. The two first connectors and two second connectors are spaced apart along a first direction. The two first connectors are arranged along a second direction. The two second connectors are arranged along a second direction. The two first connectors are respectively connected to the two second conductive parts of one conductive element. The two second connectors are respectively connected to the two second conductive parts of another conductive element. The first direction is perpendicular to the second direction.

[0006] The battery device provided in this application includes a connection assembly, which comprises two conductive elements. Each conductive element includes a first conductive portion and two second conductive portions. The first conductive portion is connected to the two second conductive portions and is electrically connected to either the overall positive or negative terminal. The second conductive portions are used to connect to conductive connectors. Parallel current transmission is achieved through the two second conductive portions of each conductive element, i.e., a dual-branch design is implemented in the battery device through the connection assembly. This allows the total current to be split into two branches, reducing the current load on each branch. Under high-intensity current conditions, compared to a single circuit, the dual-branch design generates less heat, mitigating temperature rise under high-current conditions and improving the reliability reduction caused by overheating. This achieves stability of the battery device under continuous high-current output. Furthermore, the current splitting achieved through the structure of the conductive elements, without increasing the number of individual battery cells or electrical connectors, reduces the use of other components, lowering manufacturing costs and facilitating miniaturization and weight reduction of the battery device.

[0007] According to one embodiment of this application, the bracket has an opening; the bracket includes an insulating portion, at least partially disposed in the opening, the insulating portion being configured to separate second conductive portions of two conductive elements. This simplifies the manufacturing of the opening and reduces the occurrence of short circuits by separating the second conductive portions of the two conductive elements through the insulating portion.

[0008] According to one embodiment of this application, the bracket is provided with two first openings, which are respectively used to expose the second conductive portions of the two conductive elements.

[0009] In these optional implementations, the bracket is provided with two independent first openings, each opening being exposed separately, which improves the drawbacks of simultaneously exposing multiple components and enhances the convenience of maintenance and operational independence of conductive parts.

[0010] According to one embodiment of this application, the connection assembly further includes a fuse disposed on the bracket, at least a portion of which is located inside the housing, and one of the two conductive elements is electrically connected to the main positive electrode through the fuse.

[0011] In these alternative implementations, a fuse is connected in series between one of the conductive components and the main positive terminal. When an overload or short circuit occurs in the circuit, the fuse can quickly melt, thereby improving the reliability of the battery device.

[0012] According to one embodiment of this application, two conductive elements are spaced apart along a first direction, and a fuse is disposed between the two conductive elements.

[0013] In these optional implementations, this arrangement meets the layout requirements of compact battery devices and also provides space for other internal components, which is conducive to the miniaturization of battery devices.

[0014] According to one embodiment of this application, the two conductive components include a first conductive component and a second conductive component; the battery device includes a first busbar and a second busbar, which are housed in a casing. The first busbar is connected to a first conductive portion of the first conductive component and is electrically connected to the overall positive terminal. The second busbar is connected to a first conductive portion of the second conductive component and is electrically connected to the overall negative terminal.

[0015] In these alternative embodiments, the first busbar and the second busbar electrically connect the two conductive elements to the total positive and total negative terminals, respectively. Moreover, the busbar has a large current carrying capacity and low resistance characteristics, and can converge and transmit the current of multiple battery cells to the conductive elements, which has the advantages of high current transmission efficiency and low line loss.

[0016] According to one embodiment of this application, the connection assembly further includes a fuse; in a first direction, the fuse is located between the first conductive element and the second conductive element; in the first direction, at least a portion of the first bus and at least a portion of the second bus are located on the same side of the fuse, and the first bus is connected to the first conductive element through the fuse.

[0017] In these alternative embodiments, this arrangement effectively reduces power transmission losses. Furthermore, the co-location of the first and second busbars on the same side improves the internal structural compactness of the battery device, reserving more space for the integration and layout of other components within the battery device.

[0018] According to one embodiment of this application, the connection assembly further includes a locking accessory disposed on the bracket and electrically connected to the fuse and the first busbar, the first busbar being fixed to the locking accessory.

[0019] In these alternative embodiments, by providing a locking accessory, the first busbar is fixed and connected to the fuse, which facilitates the disassembly and replacement of the first busbar and the fuse.

[0020] According to one embodiment of this application, the housing has a second opening, and the bracket covers the second opening; the battery device further includes a second seal located between the bracket and the housing, and the second seal is disposed around the circumference of the second opening.

[0021] In these alternative embodiments, the second seal fills the gap between the bracket and the housing, forming a continuous sealing barrier around the second opening, effectively preventing external moisture, dust and other foreign objects from entering the housing.

[0022] According to one embodiment of this application, the first conductive portion includes a first main body segment and two first branch segments. The first main body segment is electrically connected to the main positive electrode. The two first branch segments are respectively connected to the same end of the first main body segment near the second conductive portion, and the ends of the two first branch segments away from the first main body segment are spaced apart along a second direction. The two second conductive portions are respectively connected to the ends of the two first branch segments away from the first main body segment and bent along a first direction. The two second conductive portions are spaced apart along the second direction, and the first direction is perpendicular to the second direction.

[0023] In these alternative embodiments, this configuration creates a parallel current transmission path through the two second conductive portions of the conductive element, thereby achieving a dual-branch design for the battery device via the connecting assembly. Furthermore, it increases the connection area between the first and second conductive portions, thereby increasing the overcurrent capacity.

[0024] According to one embodiment of this application, the first main body segment includes a first part, a second part, and a third part. The first part and the third part are spaced apart along a first direction. The second part is connected between the first part and the third part. The first branch segment is connected to the end of the third part away from the second part along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0025] In these alternative embodiments, the second portion can serve as a flexible buffer section. When the battery device is subjected to external vibration, impact, or thermal expansion and contraction caused by temperature changes, the elastic deformation of the second portion can absorb stress, reducing the risk of conductive component breakage due to stress accumulation and extending the service life of the conductive components. Furthermore, the connection layout between the concave structure and the two first branch sections achieves a synergistic effect of stress absorption and current transmission.

[0026] According to one embodiment of this application, the first conductive portion includes a second main body segment and two second branch segments. The two second branch segments are respectively connected to the same end of the second main body segment near the second conductive portion, and the ends of the two second branch segments away from the second main body segment are spaced apart along a second direction. The two second conductive portions are respectively connected to the ends of the two second branch segments away from the second main body segment and bent along a second direction, and the two second conductive portions are spaced apart and arranged opposite to each other along the second direction.

[0027] In these alternative embodiments, this configuration creates a parallel current transmission path through the two second conductive portions of the conductive element, thereby achieving a dual-branch design for the battery device via the connecting assembly. It also facilitates the installation and removal of the conductive element.

[0028] According to one embodiment of this application, the second main body segment is provided with a connecting hole.

[0029] In these alternative embodiments, this configuration improves connection reliability while reducing space requirements.

[0030] According to one embodiment of this application, the second conductive part is provided with a locking hole.

[0031] In these alternative embodiments, this configuration improves connection reliability while reducing space requirements.

[0032] According to one embodiment of this application, the battery device includes a cover plate detachably connected to a bracket and used to cover at least one first opening. The cover plate provides protection for the connecting components, and its detachable connection to the bracket facilitates operation and maintenance of components such as conductive parts.

[0033] Secondly, this application provides an electrical device including the aforementioned battery device, which is used to store or provide electrical energy. By using the battery device in the electrical device, the two second conductive portions of each conductive element achieve parallel current transmission, effectively distributing the current load and improving the reliability of the electrical device's continuous high-current output.

[0034] According to one embodiment of this application, the electrical device includes a plurality of battery devices and a plurality of conductive connectors. The plurality of conductive connectors electrically connect the plurality of battery devices; two battery devices are connected by two conductive connectors, wherein two second conductive portions of a conductive member of one battery device are respectively connected to two second conductive portions of a conductive member of another battery device by the two conductive connectors.

[0035] In these alternative embodiments, the electrical device achieves parallel current transmission through two second conductive parts of each conductive element. The two second conductive parts of each conductive element are connected in a current loop, thus realizing a dual-branch design for the battery device through electrical connection components. This effectively reduces the risk of temperature rise under high current conditions, improves the reliability reduction of the battery device caused by overheating, and achieves stability of the battery device under continuous high current output. Furthermore, electrically connecting the battery device through conductive connectors effectively reduces the cross-sectional area of ​​the conductive connectors, facilitating their operation.

[0036] According to one embodiment of this application, the cross-sectional area of ​​the conductive connector is 40 mm². 2 Up to 120mm 2 .

[0037] In these alternative embodiments, the cross-sectional area of ​​the conductive connector can be effectively reduced while maintaining the same current-carrying capacity. A smaller cross-sectional area reduces the stiffness and bending resistance of the conductive connector, improving assembly efficiency and ease of maintenance.

[0038] 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

[0039] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0041] Figure 2 This is an exploded view of a battery device provided in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0043] Figure 4 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application from one angle;

[0044] Figure 5 This is a partial structural diagram of the connection assembly of a battery device provided in one embodiment of this application;

[0045] Figure 6 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application from another angle;

[0046] Figure 7 This is a schematic diagram of the structure of the connection assembly of a battery device provided in an embodiment of this application;

[0047] Figure 8 This is a front view of the connection assembly of a battery device provided in an embodiment of this application;

[0048] Figure 9 This is a top view of the connection assembly of a battery device provided in an embodiment of this application;

[0049] Figure 10 This is a partial structural schematic diagram of the connection assembly of a battery device provided in one embodiment of this application;

[0050] Figure 11 yes Figure 9 Cross-sectional structural diagram at point aa;

[0051] Figure 12 This is a partial exploded view of the connection assembly of a battery device provided in one embodiment of this application;

[0052] Figure 13This is a schematic diagram of the structure of the conductive component of the connection assembly of the battery device provided in an embodiment of this application;

[0053] Figure 14 This is a schematic diagram of the conductive component of the connection assembly of the battery device provided in another embodiment of this application;

[0054] Figure 15 This is a partial structural schematic diagram of an electrical device provided in one embodiment of this application.

[0055] The accompanying drawings may not be drawn to scale.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 1a, Battery Module; 1b, First Housing; 1c, Second Housing; 10, Housing; 11, Second Opening; 20, Battery Cell; 30, Connecting Assembly; 31, Bracket; 311, Insulating Part; 32, Conductive Component; 32a, First Conductive Component; 32b, Second Conductive Component; 321, First Conductive Part; 3211, First Main Body Section; 32111, First Part; 32112, Second Part; 32113 1. Third part; 3212. First branch segment; 3213. Second main body segment; 3214. Second branch segment; 3215. Connecting hole; 322. Second conductive part; 323. Locking hole; 33. Cover plate; 34. First opening; 35. Fuse; 36. Locking accessory; 37. Connector; 37a. First connector; 37b. Second connector; 38. First seal; 40. First busbar; 50. Second busbar; 60. Second seal; 2. Conductive connector; x. First direction; y. Second direction. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0060] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] 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 three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0063] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0064] In this application, "multiple" means two or more (including two).

[0065] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields.

[0066] A battery device typically refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity. A battery cell can be the smallest unit that makes up a battery device.

[0067] In battery devices, traditional single-branch connection methods are prone to localized temperature rise and runaway under high current conditions, severely affecting the reliability of the battery device. While the dual-loop solution can alleviate this problem, it requires two separate sets of conductive components and electrical assemblies, increasing both space requirements and manufacturing costs. The above statements are for providing background information related to this application only and do not necessarily constitute prior art.

[0068] The battery device provided in this application includes a connection assembly, which comprises two conductive elements. Each conductive element includes a first conductive portion and two second conductive portions. The first conductive portion is connected to the two second conductive portions and is electrically connected to multiple battery cells. The second conductive portions are used to connect conductive connectors. Parallel current transmission is achieved through the two second conductive portions of each conductive element, i.e., a dual-branch design of the battery device is realized through the connection assembly. This effectively reduces the risk of temperature rise under high current conditions, improves the reliability reduction caused by overheating, and achieves stability of the battery device under continuous high current output. Furthermore, current shunting is achieved through the structure of the conductive elements. Without increasing the number of battery cells or electrical connectors, the dual-branch current shunting is achieved through the structural design of the conductive elements, reducing the use of other components. This not only reduces manufacturing costs but also facilitates the miniaturization and weight reduction of the battery device.

[0069] The battery cell described in this application is applicable to batteries and electrical devices that use batteries. This battery cell can be used, but is not limited to, batteries, and can also be used in products such as vehicles, aircraft, ships, electronic devices, and power tools, thereby improving the reliability of these products.

[0070] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0071] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0072] See Figure 1 As shown, one embodiment of this application provides a vehicle 1000. 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. In one embodiment of this application, the vehicle 1000 may include a motor 300, a controller 200, and a battery device 100. The controller 200 is used to control the battery device 100 to supply power to the motor 300. The motor 300 is connected to the wheels via a transmission mechanism, thereby driving the vehicle 1000. The battery device 100 can serve as the driving power source for the vehicle 1000, replacing or partially replacing gasoline or natural gas to provide driving power to the vehicle 1000. In one example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. In one example, the battery device 100 can serve as the operating power source for the vehicle 1000's electrical system. For example, the battery device 100 can be used to meet the power needs of the vehicle 1000 during startup, navigation and operation.

[0073] Please refer to Figure 2 , Figure 2 An exploded view of a battery device 100 provided in some embodiments of this application.

[0074] In some embodiments, the battery device 100 may include one or more battery cell assemblies for providing voltage and capacity.

[0075] A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar. Mixed connection refers to multiple battery cells being connected in both series and parallel connections.

[0076] The battery cell 20 can be a secondary battery cell, which refers to a battery cell that can be recharged after being discharged to activate the active materials and continue to be used.

[0077] As an example, the battery cell 20 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0078] As an example, the battery cell 20 can be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0079] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 20; as an example, a battery cell assembly can be a battery module 1a, which is formed by arranging and fixing multiple battery cells to form an independent module. As an example, a battery module 1a can be formed by binding multiple battery cells 20 together with cable ties.

[0080] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed within the housing 10. As an example, the battery cell assembly may be a battery module 1a, which can be housed within the housing 10 by securing the battery module 1a to the housing. Alternatively, the battery cell assembly may be housed within the housing by directly securing multiple battery cells 20 to the housing.

[0081] In some embodiments, the housing 10 is used to house the battery cell 20, and the housing 10 can have various structures.

[0082] In some embodiments, the housing 10 may include a first housing 1b and a second housing 1c, which overlap each other, and together define a receiving space for accommodating a single battery cell. The second housing 1c may be a hollow structure with a first opening at one end, and the first housing 1b may be a plate-like structure, with the first housing 1b covering the first opening side of the second housing 1c so that the first housing 1b and the second housing 1c together define the receiving space. Alternatively, both the first housing 1b and the second housing 1c may be hollow structures with a first opening on one side, with the first opening side of the first housing 1b covering the first opening side of the second housing 1c. Of course, the housing formed by the first housing 1b and the second housing 1c can be of various shapes, such as a cylinder, a cuboid, etc.

[0083] In some embodiments, 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, thereby forming an enclosed space inside the housing 10 to accommodate the battery cell assembly. As an example, the frame may include multiple side beams.

[0084] In some embodiments, the housing 10 may be part of the vehicle's chassis structure. For example, a portion of the housing 10 may be at least a portion of the vehicle's floor, or a portion of the housing 10 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0085] In some embodiments, the battery device 100 may be an energy storage device.

[0086] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0087] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0088] In some embodiments, there are multiple battery cells 20, which are first connected in series, parallel, or mixed to form a battery module 1a. The multiple battery modules 1a are then connected in series, parallel, or mixed to form a whole and housed in the housing 10.

[0089] Multiple battery cells 20 in battery module 1a can be electrically connected through a busbar to achieve parallel, series, or mixed connection of the multiple battery cells 20 in battery module 1a. There can be one or more busbars, and each busbar is used to electrically connect at least two battery cells 20.

[0090] See Figures 3 to 12 , Figure 3 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application; Figure 4 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application from one angle; Figure 5 This is a partial structural diagram of the connection assembly of a battery device provided in one embodiment of this application; Figure 6 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application; Figure 7 This is a schematic diagram of the structure of the connection assembly of a battery device provided in an embodiment of this application; Figure 8 This is a front view of the connection assembly of a battery device provided in an embodiment of this application; Figure 9 This is a top view of the connection assembly of a battery device provided in an embodiment of this application; Figure 10 This is a partial structural schematic diagram of the connection assembly of a battery device provided in one embodiment of this application; Figure 11 yes Figure 9 Cross-sectional structural diagram at point aa; Figure 12 This is a partial exploded view of the connection assembly of a battery device provided in one embodiment of this application.

[0091] like Figures 3 to 12As shown, this application proposes a battery device including a housing 10, a plurality of battery cells 20, and a connecting assembly 30. The plurality of battery cells 20 are housed within the housing 10 and are connected to form a total positive electrode and a total negative electrode. The connecting assembly 30 is disposed in the housing 10. The connecting assembly 30 includes a bracket 31, two conductive elements 32, a plurality of connectors 37, and a first sealing element 38. The bracket 31 is disposed in the housing 10, and at least a portion of the bracket 31 is disposed on the outside of the housing 10. The two conductive elements 32 are connected to the bracket 31. Each conductive element 32 includes a first conductive portion 321 and two second conductive portions 322. The first conductive portion 321 is connected to the two second conductive portions 322, and the two first conductive portions 321 are electrically connected to the total positive electrode and the total negative electrode, respectively. At least a portion of the second conductive portions 322 is located on the outside of the housing 10. The bracket 31 has at least one first opening 34, through which the two second conductive portions 322 of each conductive element 32 are exposed. The connecting assembly 30 also includes multiple connectors 37, which are disposed on the bracket 31 and located outside the housing 10. Each connector 37 has a channel (not shown in the figure) that connects to the first opening 34. A first seal 38 is disposed within the channel. The multiple connectors 37 include two first connectors 37a and two second connectors 37b. The two first connectors 37a and two second connectors 37b are spaced apart along a first direction x. The two first connectors 37a are arranged along a second direction y, and the two second connectors 37b are arranged along a second direction y. The two first connectors 37a are respectively connected to the two second conductive parts 322 of one conductive element 32, and the two second connectors 37b are respectively connected to the two second conductive parts 322 of another conductive element 32. The first direction x is perpendicular to the second direction y.

[0092] In some examples, the connection component 30 includes a bracket 31 disposed on and connected to the housing 10.

[0093] In some embodiments, the bracket 31 is connected to the housing 10, and the connection method may be at least one of welding, bolting, hinge, snap-fitting, and adhesive bonding.

[0094] In some examples, at least a portion of the bracket 31 is disposed on the outside of the housing 10. This can be understood as a portion of the bracket 31 being located inside the housing 10 and another portion protruding from and outside the housing 10; or, the bracket 31 protruding from and outside the housing 10.

[0095] For example, the housing 10 has an opening, and a portion of the bracket 31 is fitted into the opening.

[0096] In some examples, the material of the bracket 31 can be a variety of materials, such as one or more of copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0097] Optionally, the support 31 is made of a material with a certain hardness and strength, such as aluminum or aluminum alloy, so that it is not easily deformed when subjected to compression or impact.

[0098] Optionally, the bracket 31 is made of insulating material.

[0099] In some examples, multiple battery cells 20 are connected in series, parallel, or mixed to form the positive and negative electrodes.

[0100] In some examples, the connection component 30 includes two conductive elements 32 with opposite polarities. Specifically, one of the two conductive elements 32 is electrically connected to the positive electrode of the plurality of battery cells 20, and the other is electrically connected to the negative electrode of the plurality of battery cells 20.

[0101] In some examples, the two conductive elements 32 have the same structure; alternatively, the two conductive elements 32 have different structures.

[0102] In some examples, the conductive element 32 includes a first conductive portion 321 and two second conductive portions 322 connected together, with at least a portion of the first conductive portion 321 located inside the housing 10 and at least a portion of the second conductive portions 322 located outside the housing 10.

[0103] Specifically, the two second conductive parts 322 are disposed on the same side of the first conductive part 321.

[0104] Optionally, the structure of the first conductive part 321 and the structure of the second conductive part 322 are different.

[0105] In some examples, the bracket 31 is provided with a first opening 34 for exposing two second conductive portions 322 of the two conductive elements 32.

[0106] In other examples, the bracket 31 is provided with two first openings 34, one of which is used to expose two second conductive portions 322 of one conductive element 32, and the other is used to expose two second conductive portions 322 of another conductive element 32.

[0107] In some other examples, the bracket 31 is provided with four first openings 34, two of which are used to expose two second conductive portions 322 of one conductive element 32, and the other two first openings 34 are used to expose two second conductive portions 322 of another conductive element 32.

[0108] The connector 37 is located on the bracket 31 and outside the housing 10 and communicates with the first opening 34. By setting the connector 37, the intrusion of dust and moisture can be reduced to a certain extent, and a relatively stable internal environment of the battery device can be maintained.

[0109] In some examples, the bracket 31 has a first opening 34 for exposing two second conductive portions 322 of the two conductive elements 32. A cover plate 33 is used to cover the first opening 34. The bracket 31 and the cover plate 33 enclose a receiving cavity, and the connector 37 has a first segment and a second segment along a first direction x, with a channel passing through the first segment and the second segment. The first segment is located inside the receiving cavity, and the second segment protrudes out of the receiving cavity.

[0110] Optionally, the connector 37 located within the receiving cavity extends along the first direction x toward the first opening 34.

[0111] For example, the connector 37 is generally cylindrical or cylindrical.

[0112] In some examples, connector 37 is made of insulating material.

[0113] For example, the connecting assembly 30 includes two connectors 37, which are disposed on the bracket 31 and located outside the housing 10, and the connectors 37 are provided with channels. The bracket 31 is provided with two first openings 34, which are respectively used to expose the second conductive portions 322 of the two conductive elements 32. The two connectors 37 are respectively connected to the two first openings 34.

[0114] When the battery device is used in electrical equipment, the conductive connector 2 is electrically connected to the second conductive part 322 of the conductive member 32 via the connector 37. The connector 37 has a guiding function, effectively guiding the conductive connector 2 through the channel of the connector 37 to connect with the second conductive part 322 of the conductive member 32. The connector 37 can also constrain the direction of the conductive connector 2, improving the phenomenon of the conductive connector 2 becoming entangled.

[0115] Exemplarily, the connector 37 has a first segment and a second segment along a first direction x, with a channel connecting the first and second segments. The first segment has a cylindrical structure, and a portion of the second segment is arc-shaped. A first seal 38 is disposed within the channel of the first segment. The first seal 38 prevents dust and moisture from entering the battery device.

[0116] When the battery device is used in an electrical appliance, the conductive connector 2 is electrically connected to the second conductive part 322 of the conductive member 32 via the connector 37. The first seal 38 seals the gap between the conductive connector 2 and the inner wall of the connector 37.

[0117] For example, the plurality of connectors 37 includes two first connectors 37a and two second connectors 37b, which are spaced apart along a first direction x, with the two first connectors 37a and the two second connectors 37b arranged along a second direction y. The connecting assembly 30 includes four first seals 38, which are respectively disposed within the channels of the two first connectors 37a and the two second connectors 37b.

[0118] The battery device provided in this application includes a connection assembly 30, which includes two conductive elements 32. Each conductive element 32 includes a first conductive part 321 and two second conductive parts 322. The first conductive part 321 is connected to the two second conductive parts 322 and is electrically connected to the total positive or total negative terminal. The second conductive parts 322 are used to connect to the conductive connector 2. The parallel transmission of current is realized through the two second conductive parts 322 of each conductive element 32. That is, the dual-branch design of the battery device is realized through the electrical connection assembly 30, which can split the total current into two branches, reduce the current carried by each branch, and generate less heat in the case of high current intensity compared with a single circuit. This can alleviate the temperature rise under high current conditions, thereby improving the defect of reduced reliability of the battery device caused by overheating and realizing the stability of the battery device under continuous high current output. Moreover, by achieving current shunting through the structure of the conductive element 32, dual-branch current shunting is achieved without increasing the number of battery cells 20 and electrical connection components 30. This reduces the use of other components, which not only lowers manufacturing costs but also helps to achieve miniaturization and weight reduction of the battery device.

[0119] Furthermore, by applying the battery device to electrical equipment and electrically connecting the battery device through the conductive connector 2, the cross-sectional area of ​​the conductive connector 2 can be effectively reduced, making it easier to operate the conductive connector 2.

[0120] According to one embodiment of this application, such as Figure 3 and Figure 5 As shown, the bracket 31 has a first opening 34. The bracket 31 includes an insulating portion 311, at least a portion of which is disposed in the first opening 34. The insulating portion 311 is configured to separate the second conductive portions 322 of the two conductive members 32.

[0121] A first opening 34 exposes both second conductive portions 322 of the two conductive elements 32.

[0122] In some examples, the two second conductive portions 322 of the two conductive elements 32 are disposed on opposite sides of the insulating portion 311.

[0123] The manufacturing of the first opening 34 is simplified, and the second conductive portions 322 of the two conductive members 32 are separated by the insulating portion 311, reducing the occurrence of short circuits.

[0124] According to one embodiment of this application, the bracket 31 is provided with two first openings 34, which are respectively used to expose the second conductive portions 322 of the two conductive elements 32.

[0125] For example, the bracket 31 includes a plurality of beams connected to form a receiving cavity and two first openings 34. The first openings 34 are in communication with the receiving cavity. A conductive element 32 is connected to the beams. A first conductive part 321 is located inside the housing 10. A second conductive part 322 is embedded in the receiving cavity and at least partially located outside the housing 10. The two first openings 34 are respectively used to expose the second conductive parts 322 of the two conductive elements 32.

[0126] In these alternative implementations, the bracket 31 is provided with two independent first openings 34, each opening allowing for individual exposure, which improves the disadvantages of simultaneously exposing multiple components and enhances the ease of maintenance and operational independence of the conductive component 32.

[0127] See also Figure 10 , Figure 10 This is a partial structural schematic diagram of the connection component 30 of a battery device provided in an embodiment of this application.

[0128] According to one embodiment of this application, such as Figure 3 and Figure 10 As shown, the connection assembly 30 also includes a fuse 35 disposed on the bracket 31. At least a portion of the fuse 35 is located inside the housing 10, and one of the two conductive elements 32 is electrically connected to the main positive electrode through the fuse 35.

[0129] For example, the bracket 31 is provided with a first opening 34 for exposing the two second conductive portions 322 of each conductive element 32 and the fuse 35, and the cover plate 33 is detachably connected to the bracket 31 and is used to cover at least one first opening 34.

[0130] For example, the bracket 31 is further provided with a third opening for exposing the fuse 35, and the cover plate 33 is detachably connected to the bracket 31 and is used to cover the first opening 34 and the third opening.

[0131] For example, the bracket 31 is further provided with a third opening for exposing the fuse 35, and the connecting assembly 30 also includes a second cover plate detachably connected to the bracket 31 for covering the third opening.

[0132] Optionally, the fuse 35 may be one of a plug-in fuse, a screw-type fuse, or a tubular fuse.

[0133] In some examples, in the third direction, the first conductive portion 321 is closer to the battery cell 20 relative to the fuse 35. The fuse 35 extends beyond the second conductive portion 322 in the third direction and away from the battery cell 20.

[0134] In these alternative implementations, a fuse 35 is connected in series between one of the conductive elements 32 and multiple battery cells 20. When an overload or short circuit occurs in the circuit, the fuse 35 can quickly melt, thereby improving the reliability of the battery device.

[0135] According to one embodiment of this application, such as Figure 10 As shown, two conductive elements 32 are spaced apart along the first direction x, and a fuse 35 is disposed between the two conductive elements 32.

[0136] In some examples, in the first direction x, the distances between the two conductive elements 32 and the fuse 35 are equal or unequal.

[0137] Optionally, in the first direction x, the distance between a conductive element 32 and the fuse 35 is less than the distance between the other conductive element 32 and the fuse 35 when the fuse 35 is electrically connected to the main positive terminal.

[0138] In some examples, a portion of the fuse 35 is located inside the housing 10, while another portion is located outside the housing 10. This arrangement reduces the space occupied by the battery within the device, which is beneficial for improving the energy density of the battery device.

[0139] In these optional implementations, this arrangement meets the layout requirements of compact battery devices and also provides space for other internal components, which is conducive to the miniaturization of battery devices.

[0140] According to one embodiment of this application, such as Figure 10 and Figure 11 As shown, the two conductive elements 32 include a first conductive element 32a and a second conductive element 32b. The battery device includes a first busbar 40 and a second busbar 50, which are housed within the housing 10. The first busbar 40 is connected to the first conductive portion 321 of the first conductive element 32a and is electrically connected to the overall positive terminal. The second busbar 50 is connected to the first conductive portion 321 of the second conductive element 32b and is electrically connected to the overall negative terminal.

[0141] In some examples, in the first direction x, the first conductor 32a and the second conductor 32b are located between the first busbar 40 and the second busbar 50, the first conductor 32a and the first busbar 40 are electrically connected, and the second conductor 32b and the second busbar 50 are electrically connected.

[0142] In some examples, in the first direction x, at least a portion of the first bus 40 and at least a portion of the second bus 50 are located on the same side of the first conductor 32a, or the first bus 40 and the second bus 50 are located on the same side of the second conductor 32b.

[0143] In these alternative embodiments, the first busbar 40 and the second busbar 50 electrically connect the two conductive elements 32 to the total positive and total negative terminals, respectively. Moreover, the two busbars have high current carrying capacity and low resistance characteristics, and can converge and transmit the current of multiple battery cells 20 to the conductive elements 32, which has the advantages of high current transmission efficiency and low line loss.

[0144] According to one embodiment of this application, such as Figure 10 and Figure 11 As shown, the connection assembly 30 also includes a fuse 35. In the first direction x, the fuse 35 is located between the first conductive element 32a and the second conductive element 32b. In the first direction x, the first bus 40 and the second bus 50 are located on the same side of the fuse 35, and the first bus 40 is connected to the first conductive element 32a through the fuse 35.

[0145] For example, the housing 10 includes two first walls and two second walls. The first walls are spaced apart along a first direction x, and the second walls are spaced apart along a second direction y. The second walls connect the two first walls, and the two first walls and the two second walls enclose a receiving space. A plurality of battery cells 20, a first busbar 40 and a second busbar 50 are disposed in the receiving space. The first conductive part 321 of the conductive element 32 and a part of the fuse 35 are disposed in the receiving space.

[0146] Optionally, the bracket 31 is disposed on the first wall. The first wall has clearance holes to allow passage for a portion of the bracket 31. A first conductive element 32a and a second conductive element 32b are spaced apart from each other along a first direction x on the bracket 31. A portion of the first busbar 40 is located between the first wall and the battery cell 20. A portion of the second busbar 50 is located between the first wall and the battery cell 20. A fuse 35 is located between the first conductive element 32a and the second conductive element 32b, and the first busbar 40 and the second busbar 50 are located on the same side of the fuse 35. The first busbar 40 is connected to the first conductive element 32a via the fuse 35.

[0147] In these alternative embodiments, this arrangement effectively reduces power transmission losses. Furthermore, the first busbar 40 and the second busbar 50 are arranged on the same side, improving the internal structural compactness of the battery device and reserving more space for the integration and layout of other components within the battery device.

[0148] See also Figure 12 , Figure 12 This is a partial exploded view of the connection assembly 30 of a battery device provided in one embodiment of this application.

[0149] According to one embodiment of this application, such as Figures 10 to 12As shown, the connecting assembly 30 also includes a locking accessory 36, which is disposed on the bracket 31 and electrically connected to the fuse 35 and the first busbar 40, and the first busbar 40 is fixed to the locking accessory 36.

[0150] In some examples, the connection component 30 also includes a locking accessory 36, which is connected to the bracket 31 and located inside the housing 10.

[0151] In some examples, the lock accessory 36 is connected to the bracket 31, and the connection method may be at least one of welding, bolting, hinge, snap-fitting, and adhesive bonding.

[0152] For example, the lock accessory 36 has a through hole through which the first busbar 40 is fixed to the lock accessory 36.

[0153] In some examples, in the first direction x, the lock attachment 36 is located between the fuse 35 and the first bus 40.

[0154] Optionally, the first conductive element 32a, the lock accessory 36, the fuse 35, and the second conductive element 32b are located on the same straight line.

[0155] In some examples, the lock accessory 36 is made of a conductive material so that the first bus 40 is electrically connected to the first conductive element 32a through the lock accessory 36 and the fuse 35.

[0156] In these alternative embodiments, by providing a locking attachment 36, the first busbar 40 is fixed and connected to the fuse 35, which facilitates the disassembly and replacement of the first busbar 40 and the fuse 35.

[0157] According to one embodiment of this application, such as Figure 3 and Figure 12 As shown, the housing 10 has a second opening 11, and the bracket 31 covers the second opening 11. The battery device also includes a second seal 60, which is located between the bracket 31 and the housing 10, and is arranged around the second opening 11.

[0158] For example, the housing 10 has a second opening 11, which is rectangular, and a bracket 31 covers the second opening 11, which is generally rectangular. A second seal 60 is located between the bracket 31 and the housing 10, and the second seal 60 is arranged around the circumference of the second opening 11. The second seal 60 is rectangular annular.

[0159] For example, the bracket 31 includes a plate that covers the second opening 11. The plate has two first openings 34 and a third opening along its thickness direction. The two first openings 34 are used to expose the second conductive portions 322 of the two conductive elements 32. The third opening is used to expose the fuse 35. The connecting assembly 30 includes a plurality of cover plates 33, including two first cover plates and a second cover plate. The two first cover plates cover the two first openings 34, and the second cover plate covers the second opening 11.

[0160] In some examples, the bracket 31 is detachably connected to the housing 10.

[0161] Specifically, the bracket 31 is connected to the housing 10 by bolts.

[0162] In these alternative embodiments, the second seal 60 fills the gap between the bracket 31 and the housing 10, forming a continuous sealing barrier around the second opening 11, effectively preventing external moisture, dust and other foreign objects from entering the interior of the housing 10.

[0163] See also Figure 13 , Figure 13 This is a schematic diagram of the conductive component of the connection assembly 30 of the battery device provided in an embodiment of this application.

[0164] According to one embodiment of this application, such as Figure 3 , Figure 12 and Figure 13 As shown, the first conductive portion 321 includes a first main body segment 3211 and two first branch segments 3212. The first main body segment 3211 is electrically connected to the main positive electrode. The two first branch segments 3212 are respectively connected to the same end of the first main body segment 3211 near the second conductive portion 322, and the ends of the two first branch segments 3212 away from the first main body segment 3211 are spaced apart along the second direction y. The two second conductive portions 322 are respectively connected to the ends of the two first branch segments 3212 away from the first main body segment 3211 and are bent along the first direction x. The two second conductive portions 322 are spaced apart along the second direction y, and the first direction x is perpendicular to the second direction y.

[0165] In some examples, the connection assembly 30 also includes a fuse 35 disposed on the bracket 31, at least a portion of which is located inside the housing 10, and a first body segment 3211 of one of the two conductive elements 32 is connected to the fuse 35.

[0166] For example, the two second conductive parts 322 are respectively connected to the ends of the two first branch segments 3212 away from the first main body segment 3211 and bent away from the fuse 35 along the first direction x.

[0167] Optionally, at least a portion of the second conductive portion 322 extends along the first direction x to form a locking surface for connecting the conductive connector 2.

[0168] In these alternative embodiments, the two second conductive portions 322 of the conductive member 32 form a parallel current transmission path, thereby realizing a dual-branch design for the battery device through the electrical connection assembly 30. Furthermore, the connection area between the first conductive portion 321 and the second conductive portion 322 can be increased, thereby increasing the overcurrent capacity.

[0169] According to one embodiment of this application, the first main body segment 3211 includes a first part 32111, a second part 32112, and a third part 32113. The first part 32111 and the third part 32113 are spaced apart along a first direction x. The second part 32112 is connected between the first part 32111 and the third part 32113. The first branch segment 3212 is connected to the end of the third part 32113 that is away from the second part 32112 along a third direction. The first direction x, the second direction y, and the third direction are perpendicular to each other.

[0170] For example, the first part 32111, the second part 32112 and the third part 32113 form a "U" shape or a "concave" shape.

[0171] In these alternative embodiments, the second portion 32112 can serve as a flexible buffer section. When the battery device is subjected to external vibration, impact, or thermal expansion and contraction caused by temperature changes, the elastic deformation of the second portion 32112 can absorb stress, reducing the risk of breakage of the conductive component 32 due to stress accumulation and extending the service life of the conductive component 32. Furthermore, the connection layout of the concave structure and the two first branch segments 3212 achieves a synergistic effect of stress absorption and current transmission.

[0172] See also Figure 14 , Figure 14 This is a schematic diagram of the conductive component of the connection assembly 30 of the battery device provided in another embodiment of this application.

[0173] According to one embodiment of this application, such as Figure 3 , Figure 12 and Figure 14 As shown, the first conductive portion 321 includes a second main body segment 3213 and two second branch segments 3214. The two second branch segments 3214 are respectively connected to the same end of the second main body segment 3213 near the second conductive portion 322, and the ends of the two second branch segments 3214 away from the second main body segment 3213 are spaced apart along the second direction y. The two second conductive portions 322 are respectively connected to the ends of the two second branch segments 3214 away from the second main body segment 3213 and are bent along the second direction y, and the two second conductive portions 322 are spaced apart and arranged opposite to each other along the second direction y.

[0174] For example, the battery device includes a first busbar 40 housed within the housing 10, the first busbar 40 being fixed to the second main body section 3213 and electrically connected to the main positive terminal.

[0175] In these alternative embodiments, the two second conductive portions 322 of the conductive element 32 create a parallel current transmission path, thereby realizing a dual-branch design for the battery device through the electrical connection assembly 30. This also facilitates the installation and removal of the conductive element 32.

[0176] According to one embodiment of this application, the second main body segment 3213 is provided with a connection hole 3215. The first busbar 40 is directly connected to the conductive element 32 through the connection hole 3215.

[0177] In these alternative embodiments, this configuration improves connection reliability while reducing space requirements.

[0178] According to one embodiment of this application, such as Figures 12 to 14 As shown, the second conductive part 322 is provided with a locking hole 323.

[0179] In some examples, the connection assembly 30 also includes a plurality of connectors 37 disposed on the bracket 31 and located outside the housing 10. The connectors 37 are provided with channels communicating with the first opening 34. When the battery device is used in an electrical appliance, the conductive connector 2 is connected to the locking hole 323 of the second conductive part 322 via an interface.

[0180] In these alternative embodiments, this configuration improves connection reliability while reducing space requirements.

[0181] According to one embodiment of this application, the battery device includes a cover plate 33, which is detachably connected to a bracket 31 and is used to cover at least one first opening 34.

[0182] In some examples, the bracket 31 and the cover plate 33 overlap each other to define at least a receiving space for the second conductive part 322.

[0183] For example, the bracket 31 may be a hollow structure with at least one first opening 34 at one end, and the cover plate 33 covers the at least one first opening 34.

[0184] For example, the bracket 31 may be a hollow structure with at least one first opening 34 at one end, and the cover plate 33 may be a hollow structure with an opening on one side, and the cover plate 33 covers at least one first opening 34.

[0185] In some examples, the cover plate 33 can have various shapes, such as regular shapes like cuboids, cubes, cylinders, etc., or other irregular shapes. This application does not limit the specific shape of the cover plate 33.

[0186] In some examples, the number of cover plates 33 can be one or more.

[0187] In some examples, the cover plate 33 is detachably connected to the bracket 31, for example, by a threaded connection, a magnetic connection, or a snap-fit ​​connection, etc.

[0188] In some examples, the cover plate 33 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and can be made of materials with high strength and high impact resistance. The cover plate 33 and the bracket 31 can be made of the same or different materials.

[0189] Optionally, the cover plate 33 may be made of an insulating material.

[0190] The cover plate 33 provides protection for the connecting assembly 30. The cover plate 33 is detachably connected to the bracket 31, which facilitates the operation and maintenance of components such as the conductive element 32.

[0191] Secondly, this application provides an electrical device, which includes the aforementioned battery device for storing or providing electrical energy.

[0192] By using battery devices in electrical equipment, the two second conductive parts of each conductive component enable parallel transmission of current, which can effectively distribute the current load and improve the reliability of continuous high current output of electrical equipment.

[0193] See Figure 15 , Figure 15 This is a partial structural schematic diagram of an electrical device provided in one embodiment of this application.

[0194] According to one embodiment of this application, such as Figure 15 As shown, the electrical device includes multiple battery devices 100 and multiple conductive connectors 2. The multiple conductive connectors 2 electrically connect the multiple battery devices 100. Two battery devices 100 are connected through two conductive connectors 2. In this case, two second conductive portions 322 of a conductive element 32 of one battery device 100 are respectively connected to two second conductive portions 322 of a conductive element 32 of another battery device 100 through two conductive connectors 2.

[0195] For example, two adjacent battery devices 100 are connected by four conductive connectors 2, each including two first conductive connectors and two second conductive connectors. One end of each of the two first conductive connectors is connected to two second conductive portions 322 of a first conductive member 32a of one battery device, and the other end of each of the two first conductive connectors 2 is connected to two second conductive portions 322 of a second conductive member 32b of another battery device. One end of each of the two second conductive connectors 2 is connected to two second conductive portions 322 of a second conductive member 32b of one battery device, and the other end of each of the two second conductive connectors 2 is connected to two second conductive portions 322 of a first conductive member 32a of another battery device. In one battery device 100, the first conductive member 32a is connected to the positive terminal of the battery module, and the second conductive member 32b is connected to the negative terminal of the battery module.

[0196] Two second conductive parts 322 of a conductive element 32 of a battery device 100 are connected to a current loop via two conductive connectors 2; two second conductive parts 322 of another conductive element 32 are connected to another loop via two conductive connectors 2.

[0197] The electrical equipment achieves parallel current transmission through the two second conductive parts 322 of each conductive element 32. The two second conductive parts 322 of each conductive element 32 are connected in a current loop, that is, the dual-branch design of the battery device is realized through the electrical connection assembly 30. This can effectively reduce the risk of temperature rise under high current conditions, improve the defect of reduced battery device reliability caused by overheating, and realize the stability of the battery device under continuous high current output. Moreover, by electrically connecting the battery device through the conductive connector 2, the cross-sectional area of ​​the conductive connector 2 can be effectively reduced, making it easier to operate the conductive connector 2.

[0198] According to one embodiment of this application, the cross-sectional area of ​​the conductive connector 2 is 40 mm². 2 Up to 120mm 2 .

[0199] Optionally, the conductive connector 2 includes a wire.

[0200] Optionally, the cross-section of the conductive connector 2 is rectangular.

[0201] In some examples, the cross-sectional area of ​​the conductive connector 2 is 40 mm². 2 40mm 2 41mm 2 42mm 2 43mm 2 44mm 2 45mm 2 46mm 2 47mm2 、48mm 2 、49mm 2 、50mm 2 、51mm 2 、52mm 2 、53mm 2 、54mm 2 、55mm 2 、56mm 2 、57mm 2 、58mm 2 、59mm 2 、60mm 2 、61mm 2 、62mm 2 、63mm 2 、64mm 2 、65mm 2 、66mm、67mm 2 、68mm 2 、69mm 2 、70mm 2 、71mm 2 、72mm 2 、73mm 2 、74mm 2 、75mm 2 、76mm 2 、77mm 2 、78mm 2 、79mm 2 、80mm 2 、81mm 2 、82mm 2 、83mm 2 、84mm 2 、85mm 2 、86mm 2 、87mm 2 、88mm 2 、89mm 2 、90mm 2 、91mm 2 、92mm 2 、93mm 2 、94mm 2 、95mm 2 、96mm 2 、97mm 2 、98mm 2 、99mm 2 、100mm 2 、101mm 2 、102mm 2 、103mm2 104mm 2 105mm 2 106mm 2 107mm 2 108mm 2 109mm 2 110mm 2 111mm 2 112mm 2 113mm 2 114mm 2 115mm 2 116mm 2 117mm 2 118mm 2 119mm 2 120mm 2 Or within any other range consisting of any two of the aforementioned endpoints.

[0202] Optionally, the cross-sectional area of ​​the conductive connector 2 is 50 mm². 2 Up to 70mm 2 .

[0203] In these alternative embodiments, the cross-sectional area of ​​the conductive connector 2 can be effectively reduced while maintaining the same current-carrying capacity. A smaller cross-sectional area reduces the stiffness and bending resistance of the conductive connector 2, improving assembly efficiency and ease of maintenance.

[0204] According to some embodiments of this application, see Figures 3 to 14 A battery device includes a housing 10, a plurality of battery cells 20, a connecting assembly 30, and a second seal 60.

[0205] Multiple battery cells 20 are housed within a housing 10, and the multiple battery cells 20 are connected to form a total positive electrode and a total negative electrode. The housing 10 has a second opening 11.

[0206] The connection assembly 30 is disposed in the housing 10. The connection assembly 30 includes a bracket 31, two conductive elements 32, a fuse 35, a first busbar 40, a second busbar 50, a locking accessory 36, multiple connectors 37, a first seal 38, and a cover plate 33.

[0207] The bracket 31 is disposed on the housing 10, and at least a portion of the bracket 31 is disposed on the outside of the housing 10, and the bracket 31 covers the second opening 11.

[0208] Two conductive elements 32 are connected to the bracket 31. Each conductive element 32 includes a first conductive portion 321 and two second conductive portions 322. The first conductive portion 321 is connected to the two second conductive portions 322. The two first conductive portions 321 are electrically connected to the main positive terminal and the main negative terminal, respectively. At least a portion of the second conductive portions 322 is located on the outside of the housing 10. The two conductive elements 32 include a first conductive element 32a and a second conductive element 32b.

[0209] The first conductive portion 321 of the first conductive member 32a includes a first main body segment 3211 and two first branch segments 3212. The first main body segment 3211 is electrically connected to the main positive electrode. The two first branch segments 3212 are respectively connected to the same end of the first main body segment 3211 near the second conductive portion 322, and the ends of the two first branch segments 3212 away from the first main body segment 3211 are spaced apart along the second direction y. The two second conductive portions 322 are respectively connected to the ends of the two first branch segments 3212 away from the first main body segment 3211 and are bent along the first direction x. The two second conductive portions 322 are spaced apart along the second direction y, and the first direction x is perpendicular to the second direction y. The first main body segment 3211 includes a first part 32111, a second part 32112, and a third part 32113. The first part 32111 and the third part 32113 are spaced apart along the first direction x. The second part 32112 is connected between the first part 32111 and the third part 32113. The first branch segment 3212 is connected to the end of the third part 32113 that is away from the second part 32112 along the third direction. The first direction x, the second direction y, and the third direction are perpendicular to each other.

[0210] The first conductive portion 321 of the second conductive member 32b includes a second main body segment 3213 and two second branch segments 3214. The two second branch segments 3214 are respectively connected to the same end of the second main body segment 3213 near the second conductive portion 322, and the ends of the two second branch segments 3214 away from the second main body segment 3213 are spaced apart along the second direction y. The two second conductive portions 322 are respectively connected to the ends of the two second branch segments 3214 away from the second main body segment 3213 and are bent along the second direction y, and the two second conductive portions 322 are spaced apart and opposite to each other along the second direction y. The second main body segment 3213 is provided with a connecting hole 3215.

[0211] The bracket 31 is provided with at least one first opening 34, through which two second conductive portions 322 of the first conductive member 32a and two second conductive portions 322 of the second conductive member 32b are exposed. The cover plate 33 is detachably connected to the bracket 31 and is used to cover at least one first opening 34.

[0212] A fuse 35 is mounted on a bracket 31, with at least a portion of the fuse 35 located inside the housing 10. A first conductive element 32a and a second conductive element 32b are spaced apart along a first direction x. The fuse 35 and a locking accessory 36 are positioned between the first conductive element 32a and the second conductive element 32b. A first busbar 40 and a second busbar 50 are located on the same side of the fuse 35. The first busbar 40 is connected to the first conductive portion 321 of the first conductive element 32a via the locking accessory 36 and the fuse 35, and the first busbar 40 is fixed to the locking accessory 36. The second busbar 50 is connected to the first conductive portion 321 of the second conductive element 32b and is electrically connected to the main negative terminal.

[0213] The connector 37 is disposed on the bracket 31 and located outside the housing 10. The connector 37 has a channel that connects to the first opening 34. The plurality of connectors 37 includes two first connectors 37a and two second connectors 37b. The two first connectors 37a and the two second connectors 37b are spaced apart along the first direction x. The two first connectors 37a are arranged along the second direction y, and the two second connectors 37b are arranged along the second direction y.

[0214] The second seal 60 is located between the bracket 31 and the housing 10, and the second seal 60 is arranged around the second opening 11.

[0215] The first direction x is perpendicular to the second direction y.

[0216] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box; a plurality of battery cells accommodated in the box, the plurality of battery cells being electrically connected and forming a total positive electrode and a total negative electrode; a connecting assembly arranged in the box, the connecting assembly comprising a bracket, two conductive pieces, a plurality of connectors and a first sealing member, the bracket being arranged in the box and at least a part of the bracket being arranged outside the box, the two conductive pieces being connected to the bracket, each of the conductive pieces comprising a first conductive part and two second conductive parts, the first conductive part being connected to the two second conductive parts, the two first conductive parts being electrically connected to the total positive electrode and the total negative electrode respectively, at least a part of the second conductive parts being located outside the box, the bracket being provided with at least one first opening, the two second conductive parts of each of the conductive pieces being exposed through the first opening, the connectors being arranged in the bracket and located outside the box, the connectors being provided with passages, the passages being communicated with the first opening, the first sealing member being arranged in the passages, the plurality of connectors comprising two first connectors and two second connectors, the two first connectors and the two second connectors being arranged in a first direction, the two first connectors being arranged in a second direction, the two second connectors being arranged in the second direction, the two first connectors being connected to the two second conductive parts of one of the conductive pieces respectively, the two second connectors being connected to the two second conductive parts of the other of the conductive pieces respectively, the first direction being perpendicular to the second direction; wherein the first conductive part comprises a first main segment and two first branch segments, the first main segment being electrically connected to the total positive electrode, the two first branch segments being connected to the same end of the first main segment close to the second conductive parts respectively, and the two first branch segments being arranged in a second direction away from the one end of the first main segment, the two second conductive parts being connected to the one end of the two first branch segments away from the first main segment respectively and being bent in the first direction, the two second conductive parts being arranged in the second direction, the first direction being perpendicular to the second direction; or the first conductive part comprises a second main segment and two second branch segments, the two second branch segments being connected to the same end of the second main segment close to the second conductive parts respectively, and the two second branch segments being arranged in a second direction away from the one end of the second main segment, the two second conductive parts being connected to the one end of the two second branch segments away from the second main segment respectively and being bent in the second direction, and the two second conductive parts being arranged in the second direction and opposite to each other.

2. The battery device according to claim 1, wherein the bracket is provided with one of the first openings; the bracket comprises an insulating part, at least a part of the insulating part being arranged in the first opening, the insulating part being configured to separate the second conductive parts of the two conductive pieces.

3. The battery device according to claim 1, wherein The bracket is provided with two first openings, and the two first openings are respectively used for exposing the second conductive parts of the two conductive members.

4. The battery device of claim 1, wherein, The connecting assembly further comprises a fuse arranged in the bracket, at least part of the fuse is located inside the box, and one of the two conductive members is electrically connected to the total positive electrode through the fuse.

5. The battery device of claim 4, wherein, The two conductive members are arranged in a first direction, and the fuse is arranged between the two conductive members.

6. The battery device of claim 1, wherein, The two conductive members comprise a first conductive member and a second conductive member; The battery device comprises a first bus member and a second bus member accommodated in the box, the first bus member is connected to the first conductive part of the first conductive member and is electrically connected to the total positive electrode, and the second bus member is connected to the first conductive part of the second conductive member and is electrically connected to the total negative electrode.

7. The battery device of claim 6, wherein, The connecting assembly further comprises a fuse; In a first direction, the fuse is located between the first conductive member and the second conductive member; In the first direction, at least part of the first bus member and at least part of the second bus member are located on the same side of the fuse, and the first bus member is connected to the first conductive member through the fuse.

8. The battery device of claim 7, wherein, The connecting assembly further comprises a locking member arranged in the bracket and electrically connected to the fuse and the first bus member, and the first bus member is fixed to the locking member.

9. The battery device of claim 1, wherein, The box has a second opening, and the bracket covers the second opening; The battery device further comprises a second sealing member located between the bracket and the box, and the second sealing member is arranged along a circumferential circle of the second opening.

10. The battery device of claim 1, wherein, The first main body section comprises a first part, a second part and a third part, the first part and the third part are arranged in a first direction, the second part is connected between the first part and the third part, the first branch section is connected to one end of the third part away from the second part in a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

11. The battery device of claim 1, wherein, The second main body section is provided with a connecting hole.

12. The battery device of claim 1, wherein, The second conductive part is provided with a locking hole.

13. The battery device of claim 1, wherein, The battery device comprises a cover plate which is detachably connected to the bracket and used for covering the at least one first opening.

14. An electrical device, characterized by The battery device according to any one of claims 1 to 13 is used for storing or providing electric energy.

15. The powered device of claim 14, wherein: the powered device comprises a plurality of the battery devices and a plurality of electrically conductive connectors, the plurality of electrically conductive connectors electrically connecting the plurality of battery devices; two of the battery devices are connected by two of the electrically conductive connectors, wherein two second electrically conductive portions of one of the electrically conductive members of one of the battery devices are connected to two of the second electrically conductive portions of one of the electrically conductive members of another of the battery devices by the two of the electrically conductive connectors.

16. The powered device of claim 15, wherein: The cross-sectional area of the electrically conductive connection is 40 mm 2 to 120 mm 2 .

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