Battery device and electric device

Abstract

The utility model relates to the technical field of battery structures, and provides a battery device and a power utilization device.The battery device comprises a battery monomer, an electric connecting piece and a protection piece, the electric connecting piece comprises a conductive main body part and an electric connecting part which are connected, and the electric connecting part is electrically connected with the battery monomer; the protective part covers the surface of the conductive main body part, and the protective part is a concrete structure part; according to the battery device provided by the embodiment of the invention, the protective part adopts the concrete structure part, so that the concrete structure part can form insulation protection on the conductive main body part, and the stability of the concrete structure part in a high-temperature environment is better, so that the service life of the battery device is prolonged. The probability that the concrete structure part is damaged due to the high-temperature environment formed under the condition of thermal runaway is low, so that the protection effect of the protection piece adopting the concrete structure part on the conductive main body part of the electric connecting piece is better, and the probability that the conductive main body part is short-circuited with other electrified structures is low.

Description

Technical Field

[0001] This application relates to the field of battery structure 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] In related technologies, electrical connectors (such as copper or aluminum sheets) are typically used in battery devices for electrical connection, and an insulating film layer is applied over the connectors for insulation protection. However, in high ambient temperatures, such as during thermal runaway of the battery device, the insulating film layer is prone to melting due to high temperatures, which may lead to a short circuit between the electrical connectors and other live structures. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem in the related art that the insulating film layer on the electrical connector is prone to melting in a high-temperature environment, resulting in a risk of short circuit in the electrical connector.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery cell, an electrical connector, and a protective component. The electrical connector includes a conductive body portion and an electrical connection portion connected to each other, and the electrical connection portion is electrically connected to the battery cell. The protective component is covered on the surface of the conductive body portion, and the protective component is a concrete structure portion.

[0007] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application utilizes a protective component to cover the surface of the conductive main body of the electrical connector. At the same time, the protective component adopts a concrete structure, thereby the concrete structure can form an insulating protection for the conductive main body. Moreover, the concrete structure has better stability in high-temperature environments. Thus, the probability of the concrete structure being damaged due to the high-temperature environment formed in the event of thermal runaway is low. Therefore, the protective component using a concrete structure provides better protection for the conductive main body of the electrical connector, and the probability of the conductive main body short-circuiting with other live structures is low.

[0008] In some embodiments, the surface of the conductive body portion is provided with a first protrusion, and the protective member covers the first protrusion.

[0009] By adopting the above technical solution, when the protective component is covered on the first protrusion, the contact area between the protective component and the first protrusion is larger. As a result, the connection strength between the protective component and the conductive body is higher, thereby further improving the overall strength of the protective component and the conductive body, and the protective effect of the protective component on the conductive body is better.

[0010] In some embodiments, a first protrusion is provided on each of the opposite two surfaces of the conductive body in a direction perpendicular to the thickness direction of the conductive body.

[0011] By adopting the above technical solution, by providing first protrusions on the opposite two side surfaces of the conductive body, the first protrusions have a low spatial impact on the conductive body along the thickness direction.

[0012] In some embodiments, a plurality of first protrusions are provided and arranged at intervals, and a first recess is provided between two adjacent first protrusions.

[0013] By adopting the above technical solution, the first recess formed between two adjacent first protrusions can be used to accommodate the insertion of some protective components, thereby further improving the connection strength between the protective components and the conductive body.

[0014] In some embodiments, at least a portion of the surface of the conductive body is provided with an insulating member, and a second protrusion is provided on the insulating member; a protective member covers the insulating member and the second protrusion.

[0015] By adopting the above technical solution, by setting an insulating component on the conductive main body and then setting a second protrusion on the insulating component, when the protective component covers the second protrusion, the connection area between the second protrusion and the protective component is larger, which can improve the connection strength between the protective component and the insulating component, and thus improve the overall strength of the protective component, the insulating component and the conductive main body.

[0016] In some embodiments, a plurality of second protrusions are provided and arranged at intervals, and a second recess is provided between two adjacent second protrusions.

[0017] By adopting the above technical solution, the second recess formed between two adjacent second protrusions can be used to accommodate the insertion of some protective components, thereby further improving the connection strength between the protective components and the insulating components and the conductive body.

[0018] In some embodiments, the battery device further includes a power distribution device, which includes a housing and electronic components housed within the housing, at least a portion of an electrical connector being housed within the housing, and an electrical connection portion of the electrical connector being electrically connected to the electronic components.

[0019] By adopting the above technical solution, at least a portion of the electrical connector can be housed within the power distribution device housing, and the electrical connector can be used to electrically connect with electronic components to achieve electrical connection between electronic components or between electronic components and battery cells.

[0020] In some embodiments, there are multiple electronic components and multiple electrical connectors, with the electrical connection portions of the multiple electrical connectors being electrically connected to the corresponding electronic components.

[0021] By adopting the above technical solution, the electrical connector can be used for electrical connection assembly between multiple electronic components in the power distribution device, and the protective component can be used to insulate and protect the conductive body of the electrical connector, thereby effectively reducing the probability of short circuit between the conductive body and the live structure of the power distribution device.

[0022] In some embodiments, there are multiple battery cells and multiple electrical connectors, with the electrical connection portions of the multiple electrical connectors being electrically connected to the corresponding battery cells.

[0023] By adopting the above technical solution, the electrical connector can be used for electrical connection assembly between multiple battery cells, and the protective component can be used to insulate and protect the conductive body of the electrical connector, thereby effectively reducing the probability of short circuit between the conductive body and other live structures.

[0024] In some embodiments, the protective element is a cement concrete structural component.

[0025] By adopting the above technical solutions, the structural strength of the cement concrete structure is better. As a result, the overall strength of the protective components using the cement concrete structure is also better, and the protective components provide better protection for the electrical connections.

[0026] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0027] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device, thus the reliability of the electrical device is better. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies 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.

[0029] Figure 1This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0030] Figure 2 An exploded view of the battery device provided in the embodiments of this application;

[0031] Figure 3 This is an exploded structural diagram of a battery cell provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the overall structure of the protective cover for the electrical connector provided in the embodiments of this application;

[0033] Figure 5 An exploded view of an electrical connector and a protective component provided in an embodiment of this application;

[0034] Figure 6 An exploded structural diagram of an electrical connector, an insulating component, and a protective component provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the distribution structure of the battery cell and power distribution device provided in the embodiments of this application;

[0036] Figure 8 This is a schematic diagram of the internal structure of the power distribution device provided in the embodiments of this application;

[0037] Figure 9 This is a schematic diagram of the structure of an electrical connector provided in an embodiment of this application for connecting multiple battery cells.

[0038] The following are the labeling elements in the figure:

[0039] 1000, vehicles;

[0040] 100. Battery assembly; 200. Controller; 300. Motor;

[0041] 10. Box; 11. First box; 12. Second box;

[0042] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab;

[0043] 30. Electrical connector; 31. Conductive body portion; 311. First protrusion; 311a. First recess; 32. Electrical connector portion; H. Thickness direction;

[0044] 40. Protective components;

[0045] 50. Insulating component; 51. Second protrusion; 51a. Second recess;

[0046] 60. Power distribution equipment; 61. Box; 62. Electronic components. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] 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 in industrial equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0052] In related technologies, electrical connectors (such as copper or aluminum sheets) are typically used in battery devices for electrical connections, and an insulating film layer is applied over these connectors for insulation protection. For example, electrical connectors can be used for connections between individual battery cells, or for connections within power distribution equipment (such as live structures within a high-voltage box), or for connections between the power distribution equipment and individual battery cells. However, under high ambient temperatures, such as in the event of thermal runaway in the battery device, the insulating film layer is prone to melting due to the high temperature, potentially leading to short circuits between the electrical connectors and other live structures.

[0053] Based on the above considerations, in order to solve the problem that the insulating film layer on the electrical connector in related technologies is prone to melting under high temperature environment, which leads to the risk of short circuit in the electrical connector, a battery device is designed. By covering the surface of the conductive body of the electrical connector in the battery device with a protective component, and the protective component is made of concrete structure, the concrete structure can form an insulating protection for the conductive body. Moreover, the concrete structure has better stability under high temperature environment. Thus, the probability of the concrete structure being damaged by the high temperature environment formed in the event of thermal runaway is low. Therefore, the protective component with concrete structure has a better protective effect on the conductive body of the electrical connector, and the probability of the conductive body short-circuiting with other live structures is low.

[0054] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, power tools, electric vehicles, electric construction machinery, electric vehicles, ships, spacecraft, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0055] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0056] Please refer to Figure 1 , Figure 1This is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be an engineering vehicle (e.g., a truck, excavator, crane, tractor, etc.), a fuel-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 provided 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. In some embodiments, the battery device 100 can also be used as a counterweight 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 requirements of the vehicle 1000 during startup, navigation, and driving.

[0057] 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.

[0058] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0059] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0060] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0061] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed in the housing 10.

[0062] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0063] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0064] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0065] 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 an enclosed space to accommodate the battery cell assembly.

[0066] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0067] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0068] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after the battery cell has been discharged by recharging to activate the active materials.

[0069] The battery cell 20 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.

[0070] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery device. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0071] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment; the shape of end cap 21 can be adapted to the shape of housing 22 to fit housing 22. Optionally, end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed when subjected to compression and impact, so that battery cell 20 can have higher structural strength and improved safety performance. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used to electrically connect with electrode assembly 23 for outputting or inputting electrical energy of battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0072] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 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 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0073] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The housing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 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, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, active ions (e.g., lithium ions) reversibly insert and extract between the positive and negative electrode sheets to achieve charging and discharging. The tabs 23a connect to the electrode terminals 21a to form a current loop.

[0074] According to some embodiments of this application, please refer to Figure 2 , Figure 4 and Figure 5 This application provides a battery device 100, including a battery cell 20, an electrical connector 30, and a protective member 40. The electrical connector 30 includes a conductive main body 31 and an electrical connection part 32 connected to each other, and the electrical connection part 32 is electrically connected to the battery cell 20. The protective member 40 is covered on the surface of the conductive main body 31, and the protective member 40 is a concrete structure.

[0075] Among them, electrical connector 30 refers to a structural component with better electrical conductivity.

[0076] Optionally, the electrical connector 30 can be, but is not limited to, various configurations such as conductive sheet, conductive busbar, conductive post, and conductive wire. The material of the electrical connector 30 can be copper, aluminum, silver, gold, or other materials with good conductivity.

[0077] Understandably, the electrical connector 30 can be used in any scenario where electrical connection is required in the battery device 100.

[0078] For example, in some embodiments, multiple battery cells 20 can be connected in series and / or in parallel via electrical connectors 30.

[0079] Alternatively, in other embodiments, the electrical connector 30 can also be used in any electrical component or control device in the battery device 100, such as a high-voltage box, which contains electrical components such as relays and fuses. These electrical components can be connected by the electrical connector 30 to achieve electrical conduction.

[0080] Alternatively, in other embodiments, the electrical connector 30 can also be used for the connection between the battery cell 20 in the battery device 100 and other electrical components or control devices, such as the connection assembly between the high voltage box and the battery cell 20.

[0081] The electrical connector 30 includes a conductive body portion 31 and an electrical connection portion 32 connected to each other; wherein, the conductive body portion 31 refers to the main body portion of the electrical connector 30. It should be understood that the conductive body portion 31 is used to realize the wiring arrangement operation, and the conductive body portion 31 does not directly form a connection with other components.

[0082] The electrical connection portion 32 refers to the part used to form a connection assembly with other components to achieve electrical conductivity. Optionally, the electrical connection portion 32 can be fixed to the conductive body portion 31 by means of welding, attachment, integral molding, etc. The number of electrical connection portions 32 can be multiple, for example, two, three, or more.

[0083] For example, in some embodiments, a connection hole may be provided on the electrical connection portion 32, so that fasteners such as bolts and screws can pass through the connection hole and be locked to other structures to form a fixation.

[0084] The electrical connection portion 32 can be located anywhere on the electrical connector 30. For example, in some embodiments, the electrical connector 30 can be a conductive copper sheet, with the two opposite ends of the conductive copper sheet along its length being the electrical connection portions 32, and the portion between the two ends being the conductive body portion 31. Alternatively, in other embodiments, any point at either end or in the middle of the electrical connector 30 can be the electrical connection portion 32, and the portion between two adjacent electrical connection portions 32 is the conductive body portion 31.

[0085] The electrical connection portion 32 is electrically connected to the battery cell 20; optionally, the electrical connection portion 32 can be directly connected to the battery cell 20, for example, by connecting to the electrode terminal 21a of the battery cell 20 to form electrical conduction; or, the electrical connection portion 32 can be indirectly directly connected to the battery cell 20 through other conductive structures (such as conductive wires, conductive sheets, conductive busbars, etc.).

[0086] By electrically connecting the electrical connection part 32 to the battery cell 20, multiple battery cells 20 can be connected in series and / or in parallel, or the battery cell 20 can be electrically connected to electrical components or control devices.

[0087] Protective component 40 refers to a structural component with superior insulation performance.

[0088] The protective member 40 is applied to the surface of the conductive main body 31. The protective member 40 can cover, enclose, or surround the conductive main body 31 in space by means of sleeve, wrap, or cover, so that the conductive main body 31 is within the coverage area of ​​the protective member 40. In this way, the protective member 40 can form a cover on the outside of the conductive main body 31 and separate it from the surrounding structure, thereby reducing the probability of short circuit between the conductive main body 31 and the surrounding structure when it is energized.

[0089] In this embodiment, the protective component 40 is a concrete structure, meaning it is a part or structure made of concrete. A concrete structure refers to a composite material structure in which aggregates are bound together by a cementing material. Depending on the cementing material, concrete can include cement concrete, gypsum concrete, silicate concrete, water glass concrete, asphalt concrete, polymer concrete, etc. For example, cement concrete uses cement as the cementing material, sand and gravel as aggregates, and water (which may contain admixtures and additives) in a certain proportion, and is obtained through mixing. Concrete structures have a simple manufacturing process, low cost, and high structural strength.

[0090] The protective component 40 can be a structural part integrally formed from concrete, or it can be a structural part assembled from multiple concrete blocks. Concrete structures have superior insulation properties and better stability under high-temperature environments. Therefore, the probability of the concrete structural part being damaged by the high-temperature environment formed in the event of thermal runaway is low.

[0091] Optionally, during assembly, the corresponding protective component 40 can be obtained first, and then the electrical connector 30 can be inserted into the protective component 40 so that the protective component 40 covers the conductive body 31 of the electrical connector 30; or, the electrical connector 30 can be integrally cast, and the conductive body 31 of the electrical connector 30 can be cast and an integral concrete structure can be directly formed on its outer surface.

[0092] The battery device 100 provided in this application embodiment utilizes a protective member 40 covering the surface of the conductive main body 31 of the electrical connector 30. The protective member 40 is made of concrete structure, thereby providing insulation protection for the conductive main body 31. Furthermore, the concrete structure exhibits superior stability under high-temperature conditions. Consequently, the probability of damage to the concrete structure caused by the high-temperature environment resulting in thermal runaway is low. This results in a better protective effect of the protective member 40 with a concrete structure on the conductive main body 31 of the electrical connector 30, and a lower probability of short-circuiting between the conductive main body 31 and other live structures.

[0093] Please refer to 4 and Figure 5In some embodiments, the surface of the conductive body 31 is provided with a first protrusion 311, and the protective member 40 covers the first protrusion 311.

[0094] In this embodiment, the surface of the conductive main body 31 is provided with a first protrusion 311; it can be understood that the first protrusion 311 refers to the part of the conductive main body 31 that is convex outward.

[0095] Optionally, the first protrusion 311 may be a protrusion structure (protrusion point, protrusion column, protrusion block, etc.) or fin structure protruding from the surface of the conductive body 31; or, the first protrusion 311 may also be a wave structure or the like provided on the surface of the conductive body 31.

[0096] In some embodiments, the surface of the conductive body portion 31 may also be provided with a concave structure, such as, but not limited to, a groove or pit provided on the surface of the conductive body portion 31.

[0097] The first protrusion 311 can be provided on any side surface of the conductive body portion 31. For example, the conductive body portion 31 can be provided on at least one side surface in the thickness direction of the conductive body portion 31; or, the conductive body portion 31 can be provided on at least one side surface in the width direction (i.e., the direction perpendicular to the thickness direction of the conductive body portion 31).

[0098] It should be understood that when the conductive main body 31 is provided with the first protrusion 311, and the protective member 40 covers the surface of the conductive main body 31, the contact area between the protective member 40 and the location where the first protrusion 311 is provided is larger. Furthermore, the protective member 40, which is made of concrete, can be integrally formed onto the surface of the conductive main body 31 by casting. Thus, the protective member 40 can fit tightly against the first protrusion 311; that is, the protective member 40 can fill the concave portion of the first protrusion 311, and the convex portion of the first protrusion 311 can be inserted into the protective member 40. This effectively improves the connection strength between the protective member 40 and the conductive main body 31, thereby effectively reducing the probability of the protective member 40 detaching from the conductive main body 31.

[0099] With this configuration, when the protective component 40 covers the first protrusion 311, the contact area between the protective component 40 and the first protrusion 311 is larger. As a result, the connection strength between the protective component 40 and the conductive main body 31 is higher, thereby further improving the overall strength of the protective component 40 and the conductive main body 31, and the protective component 40 provides better protection for the conductive main body 31.

[0100] Please refer to Figure 4 and Figure 5In some embodiments, first protrusions 311 are provided on opposite sides of the conductive body 31 along a direction perpendicular to the thickness direction H of the conductive body 31.

[0101] In this embodiment, first protrusions 311 can be provided on opposite side surfaces in a direction perpendicular to the thickness direction H of the conductive body 31.

[0102] For example, in some embodiments, the first protrusion 311 can be a raised portion, so that the conductive body portion 31 has raised portions on both opposite sides of the direction perpendicular to the thickness direction H; when the protective member 40 is provided on the surface of the conductive body portion 31, for example, the protective member 40 is integrally formed on the surface of the conductive body portion 31 by a casting operation, the protective member 40 will be integral with the conductive body portion 31, and the contact area between the protective member 40 and the raised portion is larger, and the raised portion can also limit the tendency of the protective member 40 to move relative to the conductive body portion 31.

[0103] It should be understood that the surfaces at opposite ends of the conductive body portion 31 along the thickness direction H have relatively large areas (since one side of this surface is equal to the width of the conductive body), while the surface area of ​​the conductive body portion 31 along the direction perpendicular to the thickness direction H has relatively small areas (since one side of this surface becomes equal to the thickness of the conductive body). Therefore, by providing the first protrusion 311 on the side with the smaller surface area, less conductive body portion 31 is cut during machining, thus reducing the impact on the current flow of the conductive body portion 31. Furthermore, the first protrusion 311 has a lower spatial impact on the conductive body portion 31 along the thickness direction H.

[0104] Please refer to Figure 4 and Figure 5 In some embodiments, a plurality of first protrusions 311 are provided and arranged at intervals, and a first recess 311a is provided between two adjacent first protrusions 311.

[0105] In this embodiment, the number of the first protrusions 311 can be set to multiple, such as two, three or more.

[0106] It should be understood that among the multiple spaced-apart first protrusions 311, a first recess 311a is formed between any two adjacent first protrusions 311 that is concave relative to the two first protrusions 311. With this arrangement, when a protective member 40 is provided on the surface of the conductive main body 31, a portion of the protective member 40 can be inserted into the first recess 311a between two adjacent first protrusions 311. In this way, the first protrusions 311 can limit the protective member 40, thereby further improving the connection strength between the protective member 40 and the conductive main body 31.

[0107] For example, when a protective member 40 is applied to the surface of the conductive body 31, the protective member 40 is cast and integrally formed on the surface of the conductive body 31. In this way, the protective member 40 can be formed in the first recess 311a between two adjacent first protrusions 311 and fill the first recess 311a. This can effectively increase the contact area between the conductive body 31 and the protective member 40. The portion of the protective member filled in the first recess 311a can be limited by the first protrusion 311, thereby effectively increasing the connection strength between the protective member 40 and the conductive body 31.

[0108] Please refer to Figure 4 and Figure 6 In some embodiments, at least a portion of the surface of the conductive body 31 is provided with an insulating member 50, and a second protrusion 51 is provided on the insulating member 50; the protective member 40 covers the insulating member 50 and the second protrusion 51.

[0109] Among them, insulating component 50 refers to structural component with insulating properties. Insulating component 50 includes, but is not limited to, insulating sleeve, insulating film, insulating coating and other configurations.

[0110] Alternatively, the insulating member 50 may cover all surfaces of the conductive body portion 31; or the insulating member 50 may only cover a portion of the conductive body portion 31 for protection.

[0111] The insulating member 50 can be fixed to the surface of the conductive body 31 by means of sleeve connection, or the insulating member 50 can be fixed to the surface of the conductive body 31 by means of wrapping.

[0112] The insulating member 50 is provided with a second protrusion 51; it should be understood that the second protrusion 51 refers to the structural part of the insulating member 50 whose surface is convex.

[0113] Optionally, the second protrusion 51 may be a protrusion structure (protrusion, protrusion, protrusion, etc.) or fin structure on the surface of the insulating member 50; or, the second protrusion 51 may also be a wave structure or the like provided on the surface of the insulating member 50.

[0114] In some embodiments, the insulating member 50 may also be provided with a recessed structure, such as, but not limited to, a groove or pit provided on the surface of the insulating member 50.

[0115] The second protrusion 51 can be integrally formed on the insulating member 50; for example, the insulating member 50 is formed with the above-mentioned second protrusion 51 during injection molding.

[0116] For example, in some embodiments, the insulating member 50 may be an insulating sleeve, such as a plastic sleeve, and the surface of the plastic sleeve may be integrally formed with a second protrusion 51, such as a plastic ridge structure.

[0117] Alternatively, in other embodiments, the insulating member 50 may also employ an insulating coating, which can be formed on the surface of the conductive body portion 31 by coating or spraying, and the second protrusion 51 can be formed on the insulating coating by controlling the amount of coating or spraying.

[0118] It should be understood that the process of forming the second protrusion 51 on the insulating part 50 is simpler and less costly than the process of forming the first protrusion 311 on the conductive body part 31.

[0119] With this configuration, by covering the conductive main body 31 with an insulating member 50 and then providing a second protrusion 51 on the insulating member 50, when the protective member 40 covers the second protrusion 51, the connection area between the second protrusion 51 and the protective member 40 is larger. This can improve the connection strength between the protective member 40 and the insulating member 50, and thus improve the overall strength of the protective member 40, the insulating member 50 and the conductive main body 31.

[0120] Please refer to Figure 4 and Figure 6 In some embodiments, multiple second protrusions 51 are provided and arranged at intervals, and a second recess 51a is provided between two adjacent second protrusions 51.

[0121] In this embodiment, the number of second protrusions 51 can be set to multiple, such as two, three or more.

[0122] It should be understood that among the plurality of spaced-apart second protrusions 51, a second recess 51a is formed between any two adjacent second protrusions 51, which is concave relative to the two second protrusions 51. With this arrangement, when the protective member 40 is provided, a portion of the protective member 40 can be inserted into the second recess 51a between two adjacent second protrusions 51. In this way, the second protrusions 51 can limit the protective member 40, thereby further improving the connection strength between the protective member 40 and the insulating member 50 and the conductive body 31.

[0123] Optionally, in some embodiments, a raised dot structure can be provided on the surface of the second recess 51a. When the insulating member 50 is covered on the surface of the conductive body 31, the protective member 40 is cast and integrally formed on the surface of the conductive body 31, and the protective member 40 simultaneously covers the insulating member 50. In this way, a portion of the protective member 40 can be formed in the second recess 51a to improve the bonding strength between the protective member 40 and the insulating member 50. At the same time, the raised dot structure can further increase the contact area between the insulating member 50 and the protective member 40, thereby effectively improving the connection strength between the protective member 40 and the conductive body 31.

[0124] Alternatively, in some other embodiments, the surface of the second recess 51a may be further provided with a raised strip structure. When the insulating member 50 is covered on the surface of the conductive body 31, the protective member 40 is cast and integrally formed on the surface of the conductive body 31, and the protective member 40 simultaneously covers the insulating member 50. In this way, the protective member 40 can be formed in the second recess 51a between two adjacent second protrusions 51 and fill the second recess 51a. The raised strip structure provided on the surface of the second recess 51a can further increase the contact area between the insulating member 50 and the protective member 40, so that the insulating member 50 can form a tight contact fit with the protective member 40. Moreover, the part of the protective member 40 filled in the second recess 51a can be limited by the second protrusion 51, thereby increasing the connection strength between the insulating member 50 and the protective member 40, thus reducing the probability of the protective member 40 falling off the conductive body 31.

[0125] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, the battery device 100 further includes a power distribution device 60, which includes a housing 61 and electronic components 62 housed within the housing 61. At least a portion of an electrical connector 30 is housed within the housing 61, and the electrical connection portion 32 of the electrical connector 30 is electrically connected to the electronic components 62.

[0126] The power distribution device 60 is used to control the operation of the high-voltage circuit in the electrical device; where "voltage" in high-voltage circuit refers to voltage, and high-voltage circuit refers to a circuit with a voltage exceeding 60V; for example, the power distribution device 60 can be a high-voltage distribution box, which can refer to a device responsible for the power distribution and management of the high-voltage circuit in the electrical device, such as a PDU (Power Distribution Unit) used in new energy vehicles. The PDU's function is to be responsible for the power distribution and management in the high-voltage circuit of the new energy vehicle, providing the vehicle with functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short circuit protection, high-voltage sampling, and low-voltage control, protecting and monitoring the operation of the high-voltage circuit; the high-voltage distribution box can also refer to a component used in the battery device 100 to control the charging and discharging control of the battery, such as a BDU (Battery Disconnect Unit). The BDU is a high-voltage distribution box specifically designed for the battery to control the charging and discharging of the battery.

[0127] It should be understood that the power distribution device 60 includes a housing 61 and electronic components 62; wherein, the housing 61 refers to the outer shell structure of the power distribution device 60 for housing the electronic components 62, and the electronic components 62 refer to electrical components used to realize functions such as charging and discharging control, high-voltage component power-on control, circuit overload and short circuit protection, high-voltage sampling, and low-voltage control.

[0128] For example, in some embodiments, electronic component 62 includes, but is not limited to, one or more devices such as relays, fuses, current sensors, pre-charge resistors, etc.

[0129] In this embodiment, at least a portion of the electrical connector 30 is housed within the housing 61. Optionally, the electrical connector 30 may be completely housed within the housing 61, and the electrical connector 30 is used to connect within the housing 61 and to at least two electronic components 62 to form an electrical connection. Alternatively, the electrical connector 30 may be partially housed within the housing 61, and another portion may extend to the outside of the housing 61 and connect to a structure or component outside the housing 61, such as a battery cell 20, thereby enabling electrical connection between the battery cell 20 and the electronic components 62.

[0130] It should be understood that in the application scenario of the above-mentioned electrical connector 30, the electrical connection part 32 of the electrical connector 30 can be connected to the electronic component 62 to form electrical conduction, the conductive body part 31 of the electrical connector 30 is used for wiring, and the protective part 40 can form an insulating separation protection for the conductive body part 31 to reduce the probability of short circuit in the conductive body part 31.

[0131] With this configuration, at least a portion of the electrical connector 30 can be housed within the housing 61 of the power distribution device 60, and the electrical connector 30 can be used to electrically connect with the electronic components 62 to achieve electrical connection between the electronic components 62 or between the electronic components 62 and the battery cell 20.

[0132] Please refer to Figure 4 , Figure 7 and Figure 8 In some embodiments, there are multiple electronic components 62 and multiple electrical connectors 30, and the electrical connection portions 32 of the multiple electrical connectors 30 are respectively electrically connected to the corresponding electronic components 62.

[0133] In this embodiment, the power distribution device 60 includes a plurality of electronic components 62; thus, the electrical connector 30 can be used for series and / or parallel connection between the plurality of electronic components 62 to achieve electrical conduction.

[0134] The number of electrical connectors 30 is multiple; for example, the number of electrical connectors 30 can be any number of two, three, or more. The electrical connection portions 32 of the multiple electrical connectors 30 are respectively connected to the corresponding electronic components 62, and the conductive body portions 31 of the electrical connectors 30 enable electrical conduction between the connected electronic components 62.

[0135] With this configuration, the electrical connector 30 can be used for electrical connection assembly between multiple electronic components 62 in the power distribution device 60, and the protective component 40 can be used to insulate and protect the conductive body 31 of the electrical connector 30, thereby effectively reducing the probability of short circuit between the conductive body 31 and the live structure of the power distribution device 60.

[0136] Please refer to Figure 4 and Figure 9 In some embodiments, there are multiple battery cells 20 and multiple electrical connectors 30, and the electrical connection portions 32 of the multiple electrical connectors 30 are respectively electrically connected to the corresponding battery cells 20.

[0137] In this embodiment, the electrical connector 30 can be used for electrical connection between multiple battery cells 20.

[0138] The number of electrical connectors 30 is multiple; for example, the number of electrical connectors 30 can be any number of two, three, or more. The electrical connection portions 32 of the multiple electrical connectors 30 are respectively connected to the corresponding battery cells 20, and the conductive body portions 31 of the electrical connectors 30 enable electrical conduction between the connected battery cells 20.

[0139] With this configuration, the electrical connector 30 can be used for electrical connection assembly between multiple battery cells 20, and the protective component 40 can be used to insulate and protect the conductive body 31 of the electrical connector 30, thereby effectively reducing the probability of short circuit between the conductive body 31 and other live structures.

[0140] Please refer to Figure 4 In some embodiments, the protective component 40 is a cement concrete structural part.

[0141] With this configuration, the structural strength of the cement concrete structure is better. Therefore, the overall strength of the protective component 40 using the cement concrete structure is also better, and the protective component 40 provides better protection for the electrical connector 30.

[0142] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0143] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 8 In this embodiment, the battery device 100 includes a battery cell 20, an electrical connector 30, and a protective member 40. The electrical connector 30 includes a conductive main body 31 and an electrical connection part 32 connected to each other. The electrical connection part 32 is electrically connected to the battery cell 20. The protective member 40 is covered on the surface of the conductive main body 31 and is a concrete structure.

[0144] The conductive main body 31 is provided with a first protrusion 311. In this embodiment, the first protrusion 311 can be a protrusion formed on the surface of the conductive main body 31. At the same time, a protective member 40 is formed on the surface of the conductive main body 31 by a casting process. The protective member 40 can be simultaneously applied to the first protrusion 311. In this way, the first protrusion 311 can improve the connection strength between the protective member 40 and the conductive main body 31.

[0145] In this embodiment, the battery device 100 also includes a power distribution device 60, which includes a housing 61 and electronic components 62 housed within the housing 61. Electrical connectors 30 may be disposed within the housing 61, and the electrical connection portion 32 of the electrical connector 30 may be electrically connected to the corresponding electronic components 62 to achieve electrical connection between the electronic components 62.

[0146] Please refer to Figure 1 and Figure 2 This application embodiment also provides an electrical device, including the battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0147] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above. The electrical device includes the battery device 100 described above, thus improving the reliability of the electrical device.

[0148] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by: The battery device comprises: a battery cell; and an electric connector comprising an electrically conductive main body portion and an electrically connecting portion connected to the electrically conductive main body portion, the electrically connecting portion being electrically connected to the battery cell; and a protective member covering a surface of the electrically conductive main body portion, the protective member being a concrete structure. The electrically conductive main body portion is provided with a first protrusion on a surface thereof, and the protective member covers the first protrusion.

2. The battery device of claim 1, wherein: The electrically conductive main body portion is provided with the first protrusion on opposite surfaces thereof in a direction perpendicular to a thickness direction of the electrically conductive main body portion.

3. The battery device of claim 2, wherein: The first protrusions are arranged in a plurality of rows with a first recess between adjacent first protrusions.

4. The battery device of claim 2, wherein: At least a portion of a surface of the electrically conductive main body portion is provided with an insulating member, and the insulating member is provided with a second protrusion, and the protective member covers the insulating member and the second protrusion.

5. The battery device of claim 1, wherein: The second protrusions are arranged in a plurality of rows with a second recess between adjacent second protrusions.

6. The battery device of claim 5, wherein: The battery device further comprises a power distribution device comprising a box body and electronic components accommodated in the box body, and at least a portion of the electric connector is accommodated in the box body, and the electrically connecting portion of the electric connector is electrically connected to the electronic components.

7. The battery device of any one of claims 1 to 6, wherein: The number of the electronic components is a plurality, and the number of the electric connectors is a plurality, and the electrically connecting portions of the plurality of electric connectors are respectively electrically connected to corresponding electronic components.

8. The battery device of claim 7, wherein: The number of the battery cells is a plurality, and the number of the electric connectors is a plurality, and the electrically connecting portions of the plurality of electric connectors are respectively electrically connected to corresponding battery cells.

9. The battery device of any one of claims 1 to 6, wherein: The protective member is a cement concrete structure.

10. The battery device of any one of claims 1 to 6, wherein: The battery device as claimed in any one of claims 1 to 10 is used to provide electric energy.

11. An electrical device, characterized by: ​

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