Battery device and electrical device

Abstract

The present application provides a battery device and an electrical device. The battery device includes: a box body including a box body wall; battery cells disposed in the box body; a bracket disposed in the box body and connected to the box body wall, the bracket having a formed channel; an electrical connector at least partially disposed in the channel; wherein, a first protective layer is provided on the inner wall of the channel. The present application can improve the installation efficiency and reliability of the battery device.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and more particularly, to a battery device and an electrical device. Background Art

[0002] With the rapid development of new energy technologies, battery devices have been widely used in fields such as electronic devices, electric vehicles, electric two-wheelers, and power tools. As the application of battery devices becomes more and more extensive, higher requirements are put forward for the installation efficiency and reliability of battery devices. Summary of the Invention

[0003] Embodiments of this application provide a battery device and an electrical device to improve installation efficiency and reliability.

[0004] In a first aspect, embodiments of this application provide a battery device, including: a box body including a box body wall; battery cells disposed in the box body; a bracket disposed in the box body and connected to the box body wall, the bracket forming a channel; an electrical connector, at least a part of which is disposed in the channel; wherein, a first protective layer is provided on the inner wall of the channel.

[0005] A channel is formed by the bracket, a first protective layer is provided in the channel, and at least a part of the electrical connector is located in the channel, so that the first protective layer can effectively protect the electrical connector, reducing the risk of wear of the electrical connector. The electrical connector is fixed by the bracket, which can improve the installation efficiency.

[0006] In some embodiments, the first protective layer includes a buffer layer that contacts the electrical connector.

[0007] Since the first protective layer includes a buffer layer that contacts the electrical connector, the degree of wear of the electrical connector can be reduced, the protection ability for the electrical connector can be improved, and thus the reliability of the battery device can be improved.

[0008] In some embodiments, the buffer layer has an interference fit with the electrical connector.

[0009] Thereby, the electrical connector can be fixed more firmly, the risk of the electrical connector shaking can be reduced, and the reliability can be further improved.

[0010] In some embodiments, the first protective layer further includes an intermediate layer located between the buffer layer and the inner wall of the channel; wherein, the intermediate layer includes one or more of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer.

[0011] Since the first protective layer further includes an intermediate layer, multiple protections can be formed for the electrical connector, thereby further improving the reliability of the electrical connector.

[0012] In some embodiments, the bracket includes a body portion and a fixing portion. The channel is disposed in the body portion. The fixing portion is connected to the body portion, and the fixing portion is detachably connected to the box wall.

[0013] By detachably connecting the fixing portion to the box wall, it is convenient to repair and replace the electrical connector, improving convenience.

[0014] In some embodiments, the box wall is provided with a mounting hole; at least a part of the fixing portion passes through the mounting hole and is snap-connected to the box wall.

[0015] By passing the fixing portion through the mounting hole and snap-connecting it to the box wall, quick installation can be achieved, improving installation efficiency.

[0016] In some embodiments, the body portion includes a first wall and two second walls oppositely arranged along a first direction. The second walls are connected to the first wall. The first wall and the box wall are oppositely arranged along a second direction. The first wall and the two second walls enclose the channel. The first direction is perpendicular to the second direction; the fixing portion is connected to the second wall; both sides of the electrical connector along the second direction are respectively abutted against the first protective layer and the box wall.

[0017] By enclosing a channel with the bracket and cooperating with the box wall to fix the electrical connector, the wall space of the box wall is utilized, without additionally occupying more space, which is beneficial to the utilization rate of the internal space of the box and is also beneficial to reducing the material cost of the bracket.

[0018] In some embodiments, the body portion includes a first wall and two second walls oppositely arranged along a first direction. The second walls are connected to the first wall; the fixing portion includes a bottom plate and mounting feet. The bottom plate is connected to the second wall. The first wall, the two second walls and the bottom plate enclose the channel. The first protective layer is provided on both opposite surfaces of the first wall and the bottom plate along the second direction. The first direction is perpendicular to the second direction; the mounting feet are connected to the bottom plate; both sides of the electrical connector along the second direction are respectively abutted against the two first protective layers.

[0019] By jointly forming a channel by the body portion and the bottom plate to fix the electrical connector, and fixing the bracket to the box wall through the fixing portion, the complex installation environment in the box can be adapted, improving the adaptability.

[0020] In some embodiments, the bottom plate includes a third wall and two fourth walls oppositely arranged along the first direction. The third wall is opposite to the first wall along the second direction. The fourth walls are connected to the third wall; wherein, one of the second wall and the fourth wall is provided with a first groove, and the other is a protrusion, and the protrusion is embedded in the first groove.

[0021] By embedding the protrusion into the first groove, rapid connection between the body part and the bottom plate can be achieved, and it is beneficial for the two first protective layers to better squeeze and fix the electrical connector, improving the stability of the electrical connector.

[0022] In some embodiments, the protrusion and the first groove are in interference fit.

[0023] Thereby, the risk of separation between the body part and the bottom plate is reduced, the connection reliability is improved, and further the stability of the electrical connector is enhanced.

[0024] In some embodiments, the bracket further includes at least one fixing tie strap, and the fixing tie strap is connected to the body part for fixing the wire harness.

[0025] Since the bracket further includes a fixing tie strap for fixing the wire harness, one bracket can fix the electrical connector and the wire harness at the same time, and separate and fix the electrical connector (such as a high-voltage electrical connector) and the wire harness (such as a low-voltage wire harness), eliminating the risk of damage caused by mutual friction when bundling the two together in the past, and further improving the reliability.

[0026] In some embodiments, the fixing tie strap includes a strap body and a fixing seat. The fixing seat is connected to the body part. One end of the strap body is connected to the body part, the other end of the strap body passes through the fixing seat, the fixing seat is provided with first teeth, and the strap body is provided with second teeth that cooperate with the first teeth.

[0027] By passing the strap body through the fixing seat and the second teeth on the strap body cooperating with the first teeth on the fixing seat, the wire harness can be firmly fixed to the bracket.

[0028] In some embodiments, a second protective layer is provided on the strap body, and the second protective layer contacts the wire harness.

[0029] By providing a second protective layer on the strap body and the second protective layer contacting the wire harness, the risk of wire harness shaking can be reduced, thereby effectively protecting the wire harness.

[0030] In some embodiments, the body part is provided with a second groove, and a part of the wire harness is located in the second groove.

[0031] By providing a second groove in the body part, the contact area between the wire harness and the body part can be increased, thereby improving the stability of the wire harness, and it is also convenient for the installation of the wire harness, improving the installation efficiency.

[0032] In some embodiments, the battery device further includes: a high-voltage box disposed in the box body; a connector disposed in the box body; and the electrical connector connects the high-voltage box and the connector.

[0033] Thus, the electrical connector is a high-voltage connector and can be effectively protected, thereby improving the reliability of the battery device.

[0034] In a second aspect, an electrical device provided by an embodiment of the present application includes the battery device of any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope.

[0036] Figure 1 Structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0037] Figure 2 Structural schematic diagram of a box body provided by some embodiments of the present application;

[0038] Figure 3 Structural schematic diagram of a battery cell provided by some embodiments of the present application;

[0039] Figure 4 Structural schematic diagram of the interior of a box body provided by some embodiments of the present application;

[0040] Figure 5 Structural schematic diagram of a bracket provided by some embodiments of the present application;

[0041] Figure 6 For Figure 4 Cross-sectional view at position A-A in;

[0042] Figure 7 Structural schematic diagram of a bracket provided by some other embodiments of the present application;

[0043] Figure 8 Partial enlarged structural schematic diagram of a bracket provided by some other embodiments of the present application;

[0044] Figure 9 Structural schematic diagram of a bracket for fixing an electrical connector provided by some other embodiments of the present application;

[0045] Figure 10 For Figure 9 Cross-sectional view at position B-B in;

[0046] Figure 11 Another cross-sectional view of a bracket provided by some embodiments of the present application, in which the first protective layer is omitted.

[0047] ICON:

[0048] 1000 - Vehicle; 100 - Battery device; 200 - Controller; 300 - Motor; 10 - Box; 11 - First sub - box; 12 - Second sub - box; 101 - Accommodating space; 111 - Box wall; 112 - Mounting hole; 20 - Battery cell; 21 - Outer shell; 211 - Housing; 212 - End cover; 22 - Electrode assembly; 221 - Electrode main body part; 222 - Tab; 23 - Electrode terminal; 30 - Bracket; 30a - Channel; 31 - Body part; 311 - First wall; 312 - Second wall; 313 - First groove; 314 - Second groove; 32 - Fixing part; 33 - Bottom plate; 36 - Mounting foot; 331 - Third wall; 332 - Fourth wall; 34 - Fixing tie; 341 - Tape body; Second tooth 343; 342 - Fixing seat; First tooth 344;

[0049] 35 - First protective layer; 351 - Buffer layer; 352 - Intermediate layer; 40 - Electrical connector; 60 - Second protective layer; 70 - High - voltage box; 80 - Connector; 90 - Wiring harness. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the text of this application are intended to cover non - exclusive inclusion.

[0052] The terms "first", "second", etc. in the text of this application are used to distinguish different objects rather than to describe a specific order or primary - secondary relationship.

[0053] Referring to "embodiments" in this application means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

[0054] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", and "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0055] The term "and / or" in the present application is merely an associative relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0056] The term "a plurality of" appearing in the present application refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of sheets" refers to two or more sheets (including two sheets).

[0057] The battery device mentioned in the embodiments of the present 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, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a busbar component.

[0058] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be formed by tying a plurality of battery cells with a cable tie.

[0059] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assembly is accommodated in the box body.

[0060] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0061] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0062] As an example, the box body may include a first sub-box body and a second sub-box body. The first sub-box body and the second sub-box body are snapped together so that a closed space is formed inside the box body to accommodate the battery cell assembly. The term "closed" here means covered or closed, which can be sealed or non-sealed. The first sub-box body can be a top cover or a bottom plate.

[0063] As an example, the box body 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 a closed space is formed inside the box body to accommodate the battery cell assembly.

[0064] As an example, the box body can be part of the chassis structure of a vehicle. For example, the top cover of the box body can become at least part of the floor of the vehicle, or the frame of the box body can become at least part of the cross beam and longitudinal beam of the vehicle.

[0065] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box body, and a door is provided on at least one side of the box body. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0066] In the embodiments of the present application, the battery cell can be a secondary battery, and the secondary battery refers to a battery cell that can be activated by charging after the battery cell discharges and can be used continuously.

[0067] The battery cell can be, but is not limited to, a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc.

[0068] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can play a role in preventing the positive and negative electrodes from short-circuiting, and at the same time can allow active ions to pass through.

[0069] In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material provided on at least one surface of the positive electrode current collector.

[0070] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is provided on any one or both of the two opposite surfaces of the positive electrode current collector.

[0071] As an example, the positive electrode current collector can be made of a metal foil or a composite current collector. For example, as the metal foil, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0072] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery can also be used.

[0073] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0074] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, titanium, etc. can be used.

[0075] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is disposed on either one or both of the two opposite surfaces of the negative electrode current collector.

[0076] As an example, the negative electrode active material may be a negative electrode active material for a battery well-known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate. The silicon-based material may be selected from at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxides, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as the negative electrode active material of the battery can also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0077] In some embodiments, the separator is a separator membrane. The present application has no particular limitation on the type of the separator membrane, and any well-known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0078] As an example, the main material of the separator membrane may be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics. The separator membrane may be a single-layer film or a multi-layer composite film, without particular limitation. When the separator membrane is a multi-layer composite film, the materials of each layer may be the same or different, without particular limitation. The separator may be a single component located between the positive and negative electrodes, or may be attached to the surfaces of the positive and negative electrodes.

[0079] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0080] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0081] In some embodiments, the electrode assembly is a laminated structure.

[0082] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0083] In some embodiments, the housing includes an end cap and a housing body. The housing body is provided with an opening, and the end cap closes the opening to form a sealed space for accommodating substances such as the electrode assembly and the electrolyte. The housing body can be provided with one or more openings. One or more end caps can also be provided.

[0084] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab of the electrode assembly. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through an adapter. The electrode terminal can be provided on the end cap or on the housing body.

[0085] In some embodiments, a pressure relief valve is provided on the housing. The pressure relief valve is used to release the internal pressure of the battery cell.

[0086] In some embodiments, the housing can be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, the housing can protect the electrode assembly and prevent, for example, electrolyte leakage. When the housing is a non-sealed structure, the housing can protect the electrode assembly, and a sealing bag can further be included between the housing and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and the electrolyte, etc. Specifically, the sealing bag can be a bag-shaped insulating part or an aluminum-plastic film.

[0087] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc.

[0088] The development of battery device technology needs to consider various design factors simultaneously. For example, performance parameters such as energy density, discharge capacity, charge-discharge rate, etc. In addition, the installation efficiency and reliability of the battery device also need to be considered.

[0089] In a battery device, the electrical connector plays an indispensable role in connecting two components to achieve electrical connection. For example, the high-voltage electrical connector in the battery device for connecting the high-voltage box and the connector cannot meet the clearance requirements between the high-voltage connector and other components due to the relatively tight internal space of the battery device. Therefore, it is necessary to wind protective components such as wear-resistant network tubes and foams on the outer surface of the high-voltage electrical connector to reduce the degree of wear caused by frequent vibration or relative displacement between the high-voltage electrical connector and other parts, ensuring the normal operation of the high-voltage electrical connector. Since the high-voltage electrical connector is usually relatively long, this manual winding method requires a large amount of time and manpower. During large-scale production, it leads to low installation efficiency, increases production costs, and moreover, the quality of manual winding is difficult to ensure a unified standard, and the protection effects may vary due to the proficiency of the operators, unable to reliably protect the electrical connector, ultimately resulting in poor reliability of the battery device.

[0090] In response to this, the present application provides a bracket with a channel, and a protective layer is provided on the inner wall of the channel. The electrical connector is accommodated in the channel and fixed to the box body through the bracket, which can not only well protect the electrical connector but also quickly fix the electrical connector to the box body. Thus, the installation efficiency and reliability of the battery device can be improved.

[0091] The battery cell and the battery device disclosed in the embodiments of the present application can be but are not limited to being used in power-consuming devices such as vehicles, ships, or aircraft. The power supply system of the power-consuming device can be composed of the battery cell and the battery device disclosed in the present application.

[0092] The technical solutions described in the embodiments of the present application are applicable to various power-consuming devices using battery devices, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships, and spacecrafts. For example, spacecrafts include airplanes, rockets, space shuttles, and spaceships, etc.

[0093] For the convenience of description in the following embodiments, a vehicle is taken as an example of a power-consuming device in an embodiment of the present application for illustration.

[0094] Refer to Figure 1 , vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. A battery device 100 is provided inside vehicle 1000, and the battery device 100 can be provided at the bottom, head, or tail of vehicle 1000. The battery device 100 can be used for power supply of vehicle 1000. For example, the battery device 100 can be used as the operating power supply of vehicle 1000 for the circuit system of vehicle 1000, such as for the working power requirements during the start-up, navigation, and operation of vehicle 1000.

[0095] The vehicle 1000 may further 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, it is used for the power demand during the start-up, navigation, and driving of the vehicle 1000.

[0096] In some embodiments of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0097] Refer to Figure 2 , the battery device 100 includes a box body 10 and battery cells 20. The battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first sub-box body 11 and a second sub-box body 12. The first sub-box body 11 and the second sub-box body 12 cover each other, and the first sub-box body 11 and the second sub-box body 12 jointly define an accommodation space 101 for accommodating the battery cells 20. The second sub-box body 12 can be a hollow structure with one end open, and the first sub-box body 11 can be a plate-like structure. The first sub-box body 11 covers the open side of the second sub-box body 12 so that the first sub-box body 11 and the second sub-box body 12 jointly define the accommodation space; the first sub-box body 11 and the second sub-box body 12 can also both be hollow structures with one side open, and the open side of the first sub-box body 11 covers the open side of the second sub-box body 12.

[0098] In the battery device 100, there may be multiple battery cells 20. The multiple battery cells 20 can be connected in series, parallel, or in a hybrid connection. A hybrid connection means that there are both series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, parallel, or in a hybrid connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box body; of course, the battery device 100 can also be that multiple battery cells 20 are first connected in series, parallel, or in a hybrid connection to form a battery module form, and then multiple battery modules are connected in series, parallel, or in a hybrid connection to form a whole and are accommodated in the box body. The battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component for realizing the electrical connection among the multiple battery cells 20.

[0099] Refer to Figure 3 , the battery cell 20 includes a housing 21, an electrode assembly 22, and other functional components. The housing 21 includes a shell 211 and an end cap 212. The shell 211 has an opening, and the end cap 212 closes the opening to isolate the internal environment of the battery cell 20 from the external environment.

[0100] The housing 211 is a component for cooperating with the end cap 212 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 22, the electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. The housing 211 can be of various shapes and sizes. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 22. The material of the housing 211 can be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0101] The end cap 212 is a component that covers the opening of the housing 211 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 212 can be adapted to the shape of the housing 211 to cooperate with the housing 211. Optionally, the end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 212 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved reliability. Functional components such as the electrode terminal 23 can be provided on the end cap 212. The electrode terminal can be used for electrically connecting with the electrode assembly to output or input the electrical energy of the battery cell. The material of the end cap 212 can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special restrictions on this. In some embodiments, an insulating structure can also be provided on the inner side of the end cap 212, and the insulating structure can be used to isolate the electrical connection components in the housing 211 from the end cap 212 to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.

[0102] The electrode assembly 22 is a component in the battery cell 20 where an electrochemical reaction occurs. The housing 211 can contain one or more electrode assemblies 22. The electrode assembly 22 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and usually, a separator is provided between the positive electrode plate and the negative electrode plate to separate the positive electrode plate and the negative electrode plate to avoid internal short circuit between the positive electrode plate and the negative electrode plate. The parts of the positive electrode plate and the negative electrode plate having active substances constitute the electrode main body part 221 of the electrode assembly 22, and the parts of the positive electrode plate and the negative electrode plate without active substances respectively constitute the electrode tabs 222. The positive electrode tab and the negative electrode tab can be located at one end of the electrode main body part 221 together or at both ends of the electrode main body part 221 respectively.

[0103] The following refers to Figures 4 to 11 , and a detailed description will be given to the battery device 100 of the embodiments of the present application.

[0104] An embodiment of the present application provides a battery device 100, including: a box body 10, including a box body wall 111; a battery cell 20, disposed inside the box body 10; a bracket 30, disposed inside the box body 10 and connected to the box body wall 111, and the bracket 30 forms a channel 30a; an electrical connector 40, at least partially disposed inside the channel 30a; wherein, a first protective layer 35 is disposed on the inner wall of the channel 30a.

[0105] The box body wall 111 can be any wall of the box body 10, such as a side wall, a bottom wall, a top wall, etc. As an example, referring to Figure 4 , the box body wall 111 is a side wall of the box body 10.

[0106] The bracket 30 is used to protect and fix the electrical connector 40. The bracket 30 is connected to the box body wall 111, so that the electrical connector 40 is fixed to the box body wall 111 through the bracket 30. There can be various connection methods between the bracket 30 and the box body wall 111, such as snap connection, bonding, riveting, bolt connection, etc.

[0107] Wherein, the bracket 30 forms a channel 30a, and the channel 30a is used to accommodate the electrical connector 40. The electrical connector 40 can be partially located in the channel 30a or entirely located in the channel 30a. As an example, referring to Figure 4 , both ends of the electrical connector 40 pass through the channel 30a respectively. Most of the electrical connector 40 is accommodated in the channel 30a. Both ends of the electrical connector 40 are electrically connected to a high-voltage box 70 and a connector 80 respectively. The connector 80 can be an input or output end of the battery device 100. The shape of the channel 30a can be square, circular or other shapes. As an example, the shape of the channel 30a is adapted to the shape of the electrical connector 40 and is square. The channel 30a can be a closed structure with openings at both ends, or an open structure with openings at both ends and also an opening on one side. The openings at both ends of the channel 30a facilitate both ends of the electrical connector 40 to pass through.

[0108] A first protective layer 35 is disposed on the inner wall of the channel 30a, and the first protective layer 35 is used to protect the electrical connector 40. The first protective layer 35 can be pasted on the inner wall of the channel 30a or coated on the inner wall of the channel 30a. The first protective layer 35 can cover the entire inner wall of the channel 30a or only cover a part of the inner wall of the channel 30a. The first protective layer 35 can be a multi-layer structure, such as two layers, three layers or more layers. The first protective layer 35 can also be a single-layer structure.

[0109] As an example, the extending direction Z of the channel 30a can be consistent with the extending direction of the electrical connector 40, so that the bracket 30 can provide comprehensive protection for the electrical connector 40. For example, if the electrical connector 40 extends in a straight line, the channel 30a can also extend in a straight line. If the electrical connector 40 extends in a bent shape (such as an L shape), the channel 30a can also extend in a bent shape (such as an L shape). The material of the bracket 30 can be metal, plastic, etc. For example, the material of the bracket 30 can be flexible plastic for easy bending.

[0110] A channel 30a is formed through the bracket 30, and a first protective layer 35 is arranged in the channel 30a. At least a part of the electrical connector 40 is located in the channel 30a, so that the first protective layer 35 can effectively protect the electrical connector 40 and reduce the risk of wear of the electrical connector 40. The electrical connector 40 is installed on the box body wall 111 through the bracket 30, which can improve the installation efficiency.

[0111] In some embodiments, referring to Figure 6 , the first protective layer 35 includes a buffer layer 351, and the buffer layer 351 is in contact with the electrical connector 40.

[0112] The buffer layer 351 is in contact with the electrical connector 40, and the buffer layer 351 can wrap at least a part of the electrical connector 40. When the electrical connector 40 is vibrated and undergoes relative displacement, the buffer layer 351 can play a certain buffering and shock-absorbing role. The buffer layer 351 can be foam, rubber, etc.

[0113] By including the buffer layer 351 in the first protective layer 35 and the buffer layer 351 being in contact with the electrical connector 40, the degree of wear of the electrical connector 40 can be reduced, the protection ability for the electrical connector 40 can be improved, and thus the reliability of the battery device 100 can be improved.

[0114] In some embodiments, the buffer layer 351 is in interference fit with the electrical connector 40.

[0115] The buffer layer 351 has a certain elasticity. In the installed state of the bracket 30, the buffer layer 351 is in a compressed state and applies a certain elastic force to the electrical connector 40, so that the electrical connector 40 is closely attached to the buffer layer 351 to form an interference fit.

[0116] Thereby, the electrical connector 40 can be fixed more firmly, the risk of the electrical connector 40 shaking can be reduced, and the reliability can be further improved.

[0117] In some embodiments, referring to Figure 6 , the first protective layer 35 further includes an intermediate layer 352, and the intermediate layer 352 is located between the buffer layer 351 and the inner wall of the channel 30a; wherein, the intermediate layer 352 includes one or more of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer.

[0118] The intermediate layer 352 can be one layer or multiple layers. When the intermediate layer 352 is one layer, the intermediate layer 352 can be any one of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer. When the intermediate layer 352 is multiple layers, the intermediate layer 352 can be at least two of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer. Each layer can be adhesively bonded or laminated to each other. As an example, the intermediate layer 352 includes a fireproof layer, and the fireproof layer can be closer to the bracket 30 than other layers.

[0119] As an example, the fireproof layer can be a ceramic layer, a composite ceramic layer, a mica layer, a glass fiber layer, etc. The heat dissipation layer can be a graphite layer, a metal layer (aluminum, copper), etc. The electromagnetic shielding layer can be a metal fiber layer or plastic with a conductive coating on the surface.

[0120] By further including the intermediate layer 352 in the first protective layer 35, multiple protections can be formed for the electrical connector 40, thereby further improving the reliability of the electrical connector 40.

[0121] In some embodiments, the bracket 30 includes a body portion 31 and a fixing portion 32. The channel 30a is provided in the body portion 31. The fixing portion 32 is connected to the body portion 31, and the fixing portion 32 is detachably connected to the box wall 111.

[0122] The body portion 31 is the part of the bracket 30 mainly used for accommodating the electrical connector 40, and the extending direction Z of the body portion 31 can be the same as the extending direction of the electrical connector 40. Figure 5 An example in which the body portion 31 extends in a straight line is shown.

[0123] The fixing portion 32 is a connecting structure in the bracket 30, and the bracket 30 is detachably connected to the box wall 111 through the fixing portion 32. There can be various ways of detachable connection, such as snap connection, riveting, bolt connection, etc.

[0124] The number of the fixing portions 32 can be one or more. When there are multiple fixing portions 32, the multiple fixing portions 32 can be arranged at intervals along the extending direction of the bracket 30.

[0125] By detachably connecting the fixing portion 32 to the box wall 111, it is convenient to repair and replace the electrical connector 40, improving the convenience.

[0126] In some embodiments, the box wall 111 is provided with a mounting hole 112; at least a part of the fixing portion 32 passes through the mounting hole 112 and is snap-connected to the box wall 111.

[0127] The box body wall 111 is provided with mounting holes 112, and the positions of the mounting holes 112 correspond to the positions of the fixing parts 32. During installation, the electrical connector 40 can be first passed through the channel 30a, and then the fixing part 32 on the bracket 30 is aligned with the mounting hole 112 and the bracket 30 is pressed, so that the fixing part 32 passes through the mounting hole 112 and is clamped with the box body wall 111.

[0128] As an example, referring to Figure 5 and Figure 6 , the fixing part 32 can include a plurality of mounting feet 36, the plurality of mounting feet 36 are arranged at intervals along the extending direction Z of the main body part 31, each mounting foot 36 can include a main body part and a claw part, the claw part is connected to the main body part, the main body part passes through the corresponding mounting hole 112, and the claw part abuts against the box body wall 111.

[0129] By passing the fixing part 32 through the mounting hole 112 and clamping it with the box body wall 111, rapid installation can be achieved and the installation efficiency can be improved.

[0130] In some embodiments, referring to Figure 5 and Figure 6 , the main body part 31 includes a first wall 311 and two second walls 312 oppositely arranged along the first direction X, the second walls 312 are connected to the first wall 311, the first wall 311 and the box body wall 111 are oppositely arranged along the second direction Y, the first wall 311 and the two second walls 312 enclose the channel 30a, the first direction X is perpendicular to the second direction Y; the fixing part 32 is connected to the second wall 312; the electrical connector 40 abuts against the first protective layer 35 and the box body wall 111 respectively on both sides along the second direction Y.

[0131] As an example, the first wall 311 can be the bottom wall of the main body part 31, and the second walls 312 can be the side walls of the main body part 31. The channel 30a with an opening on one side is enclosed by the first wall 311 and the two second walls 312. The fixing part 32 can be a mounting foot 36, the mounting foot 36 is connected to the end of the second wall 312 far from the first wall 311, and the fixing part 32 extends along the second direction Y. The first wall 311, the two second walls 312 and the fixing part 32 can be integrally formed. Figure 5 and Figure 6 In the example shown, the fixing part 32 is a mounting foot 36, the mounting foot 36 is connected to the main body part 31, and the main body part 31 is detachably connected to the box body wall 111 through the mounting foot 36.

[0132] During installation, the fixing part 32 is aligned with the mounting hole 112 on the box body wall 111, and the bracket 30 is pressed along the second direction Y so that the fixing part 32 passes through the mounting hole 112 and is snap-connected to the box body wall 111. At this time, the box body wall 111 covers the opening of the channel 30a, and both sides of the electrical connector 40 along the second direction Y are respectively abutted against the first protective layer 35 and the box body wall 111. For example, the electrical connector 40 is pressed against the box body wall 111 through the buffer layer 351 in the first protective layer 35.

[0133] Thus, a channel 30a with an opening on one side is formed by the bracket 30, and the bracket 30 and the box body wall 111 cooperate to fix the electrical connector 40, making use of the wall space of the box body wall 111, which is suitable for the case where the wall space of the box body wall 111 is sufficient, and can reduce the material cost of the bracket 30.

[0134] In some embodiments, referring to Figure 7 、 Figure 8 、 Figure 9 and Figure 10 ,the body part 31 includes a first wall 311 and two second walls 312 oppositely arranged along the first direction X, and the second walls 312 are connected to the first wall 311; the fixing part 32 includes a bottom plate 33 and a mounting foot 36, the bottom plate 33 is connected to the second wall 312, the first wall 311, the two second walls 312 and the bottom plate 33 enclose the channel 30a, and first protective layers 35 are provided on both opposite surfaces of the first wall 311 and the bottom plate 33 along the second direction Y, the first direction X is perpendicular to the second direction Y; the mounting foot 36 is connected to the bottom plate 33; both sides of the electrical connector 40 along the second direction Y are respectively abutted against the two first protective layers 35.

[0135] As an example, the first wall 311 may be the bottom wall of the body part 31, and the second wall 312 may be the side wall of the body part 31. The channel 30a with an opening on one side formed by the first wall 311 and the two second walls 312 is covered by the bottom plate 33, and the body part 31 and the bottom plate 33 together form an annular channel 30a.

[0136] Figure 7 、 Figure 8 、 Figure 9 and Figure 10 In the examples shown, the fixing part 32 includes a bottom plate 33 and a mounting foot 36, the fixing part 32 is connected to the body part 31 through the bottom plate 33, and the fixing part 32 is detachably connected to the box body wall 111 through the mounting foot 36.

[0137] In the case where the wall space of the box body wall 111 is insufficient, the body part 31 and the bottom plate 33 of the bracket 30 together form an annular channel 30a to fix the electrical connector 40, and the bracket 30 is fixed to the box body wall 111 through the fixing part 32, thereby being able to adapt to the complex installation environment in the box body 10 and improving the adaptability.

[0138] In some embodiments, the bottom plate 33 includes a third wall 331 and two fourth walls 332 oppositely arranged along the first direction X. The third wall 331 is opposite to the first wall 311 along the second direction Y, and the fourth walls 332 are connected to the third wall 331. One of the second wall 312 and the fourth wall 332 is provided with a first groove 313, and the other is a protrusion that is embedded in the first groove 313.

[0139] The first groove 313 may be provided at one end of the second wall 312 away from the first wall 311, and the fourth wall 332 is embedded in the first groove 313 as a protrusion. Alternatively, the first groove may be provided at one end of the fourth wall 332 away from the third wall 331, and the second wall 312 is embedded in the first groove 313 as a protrusion.

[0140] As an example, the two fourth walls 332 are respectively connected to both sides of the third wall 331 along the first direction X. The fourth walls 332 extend along the second direction Y and may be integrally formed with the third wall 331. During installation, the fourth walls 332 are embedded in the corresponding first grooves 313 along the second direction Y, so that the body part 31 and the bottom plate 33 are buckled with each other to form a channel 30a, and the electrical connector 40 is squeezed between two first protective layers 35 (such as buffer layers) to fix the electrical connector 40.

[0141] By embedding the protrusion into the first groove 313, the quick connection between the body part 31 and the bottom plate 33 can be realized, and it is beneficial for the two first protective layers 35 to squeeze and fix the electrical connector 40, improving the stability of the electrical connector 40.

[0142] In some embodiments, the protrusion and the first groove 313 are in interference fit.

[0143] When the protrusion is embedded in the first groove 313, there is a certain interference amount between the protrusion and the first groove 313, reducing the risk of separation between the body part 31 and the bottom plate 33 and improving the connection firmness.

[0144] In some embodiments, referring to Figure 11 , the bracket 30 further includes at least one fixing tie 34, and the fixing tie 34 is connected to the body part 31 for fixing the wire harness 90.

[0145] The number of the fixing ties 34 may be one or more. When there are multiple fixing ties 34, the multiple fixing ties 34 may be spaced along the extending direction Z of the body part 31.

[0146] It can be understood that the fixing tie 34 is located outside the channel 30a. Exemplarily, the fixing tie 34 is connected to the side of the first wall 311 of the body part 31 away from the channel 30a.

[0147] The wire harness 90 can be a low-voltage wire harness, which is used to connect low-voltage control modules such as a battery management system, a communication system, and various monitoring sensors within the battery device 100.

[0148] The bracket 30 further includes a fixing tie strap 34 for fixing the wire harness 90, so that one bracket 30 can fix the electrical connector 40 and the wire harness 90 at the same time, and separate and fix the electrical connector 40 (such as a high-voltage electrical connector) and the wire harness 90 (such as a low-voltage wire harness), eliminating the risk of damage caused by mutual friction when the two are bundled together in the past, and further improving the reliability.

[0149] In some embodiments, the fixing tie strap 34 includes a strap body 341 and a fixing seat 342. The fixing seat 342 is connected to the body portion 31. One end of the strap body 341 is connected to the body portion 31, and the other end of the strap body 341 passes through the fixing seat 342. The fixing seat 342 is provided with a first tooth 344, and the strap body 341 is provided with a second tooth 343 that cooperates with the first tooth 344.

[0150] By passing the strap body 341 through the fixing seat 342 and the second tooth 343 on the strap body 341 cooperating with the first tooth 344 on the fixing seat 342, the wire harness 90 is firmly fixed to the bracket 30.

[0151] In some embodiments, a second protective layer 60 is provided on the strap body 341, and the second protective layer 60 contacts the wire harness 90.

[0152] The second protective layer 60 is used to protect the wire harness 90. The second protective layer 60 can be pasted on the inner wall of the strap body 341 or coated on the inner wall of the strap body 341. The second protective layer 60 can be a multi-layer structure, such as two layers, three layers or more layers. The second protective layer 60 can also be a single-layer structure. The second protective layer 60 can be one or more of a buffer layer, a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer. Exemplarily, the second protective layer 60 includes a buffer layer, and the buffer layer can be a rubber pad.

[0153] By providing the second protective layer 60 on the strap body 341 and the second protective layer 60 contacting the wire harness 90, the risk of the wire harness 90 shaking can be reduced, thereby effectively protecting the wire harness 90.

[0154] In some embodiments, the body portion 31 is provided with a second groove 314, and a part of the wire harness 90 is located in the second groove 314.

[0155] The shape of the second groove 314 can be adapted to the outer surface shape of the wire harness 90, such as an arc shape. The second groove 314 can play a guiding role for the wire harness 90, so that the wire harness can pass through the fixing tie strap 34 smoothly.

[0156] The second groove 314 is provided in the body portion 31, which can increase the contact area between the wire harness 90 and the body portion 31, thereby improving the stability of the wire harness 90 and also facilitating the installation of the wire harness 90 and improving the installation efficiency.

[0157] Next, with reference to Figures 4 to 11 , specific examples of the present application will be described.

[0158] An embodiment of the present application provides a battery device 100, which includes a box body 10, battery cells 20, a bracket 30, and an electrical connector 40.

[0159] The box body 10 includes a box body wall 111, and the box body wall 111 can be a side wall of the box body 10. The bracket 30 is formed with a channel 30a for accommodating the electrical connector 40. The electrical connector 40 is a high-voltage electrical connector for connecting between the high-voltage box 70 and the connector 80, and both ends of the electrical connector 40 pass through the channel 30a. The electrical connector 40 is fixed to the box body wall 111 through the bracket 30. Among them, a first protective layer 35 is provided on the inner wall of the channel 30a. The first protective layer 35 can include a buffer layer 351 and an intermediate layer 352. The buffer layer 351 is in contact with the first protective layer 35, and the intermediate layer 352 is located between the inner wall of the channel 30a and the buffer layer 351. The buffer layer 351 can be a foam layer. The intermediate layer 352 can be one or more of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer. The fireproof layer can be a ceramic layer, a composite ceramic layer, a mica layer, a glass fiber layer, etc. The heat dissipation layer can be a graphite layer, a metal layer (aluminum, copper), etc. The electromagnetic shielding layer can be a metal fiber layer or plastic coated with a conductive coating on the surface. Thus, the fireproof, wear-resistant, buffer and other protective functions of the electrical connector 40 are realized, so as to achieve the purpose of reducing manual winding and adding an outer protective layer on the electrical connector 40.

[0160] According to the different installation environments inside the box body 10, there are two types of brackets 30, namely the surface pressing type and the separated pushing and pulling type. The surface pressing type is suitable for the case where the area of the wall surface of the box body wall 111 is large. The separated pushing and pulling type is suitable for the case where the wall surface of the box body wall 111 is small and the installation environment is complex.

[0161] With reference to Figures 4 to 6, shows a veneer pressing type bracket 30, including a body part 31 and a fixing part 32. The body part 31 has a first wall 311 and two second walls 312 opposite to each other along the first direction X. The second walls 312 are connected to the first wall 311, and the first wall 311 and the two second walls 312 enclose a channel 30a with an opening (open end) on one side. There are multiple fixing parts 32. The multiple fixing parts 32 are spaced along the extending direction Z of the body part 31. The fixing part 32 is connected to the end of the second wall 312 away from the first wall 311 and extends along the second direction Y. The fixing part 32 serves as a mounting foot and has multiple clamping claws thereon. Mounting holes 112 corresponding to the multiple fixing parts 32 one by one are provided on the box body wall 111. During installation, the fixing part 32 is aligned with the corresponding mounting hole 112, and the bracket 30 is pressed along the second direction Y so that the fixing part 32 passes through the mounting hole 112 and is clamped with the box body wall 111. At this time, the box body wall 111 covers the opening of the channel 30a to abut the two sides of the electrical connector 40 along the second direction Y against the buffer layer 351 and the wall surface of the box body wall 111 respectively.

[0162] Referring to Figures 7 to 10 , shows a separating and pushing / pulling type bracket 30, including a body part 31 and a base. The base includes a bottom plate 33 and a fixing part 32 provided on the bottom plate 33. The body part 31 has a first wall 311 and two second walls 312 opposite to each other along the first direction X. The second walls 312 are connected to the first wall 311, and a first groove 313 is provided at the end of the second wall 312 away from the first wall 311. The bottom plate 33 includes a third wall 331 and two fourth walls 332. The two fourth walls 332, as protrusions, are respectively embedded in the corresponding first grooves 313 and are in interference fit with the corresponding first grooves 313. The first wall 311 and the bottom plate 33 are opposite to each other along the second direction Y, and buffer layers 351 are provided on both opposite surfaces. During installation, the body part 31 and the bottom plate 33 are covered with each other to push the fourth wall 332 into the first groove 313 so that the body part 31 and the bottom plate 33 jointly enclose an annular channel 30a, firmly squeezing the electrical connector 40 between the two buffer layers 351. Then, the bracket 30 is fixed by clamping with the mounting holes 112 on the box body wall 111 through the fixing part 32.

[0163] Referring to Figure 11 , the bracket 30 may further include an extension part connected to the body part 31. The extension part is a fixing tie strap 34 for fixing the low-voltage wire harness 90. A second protective layer 60 is further provided on the inner wall of the fixing tie strap 34. The second protective layer 60 is a rubber pad. A second groove 314 is provided on the outer surface of the body part 31. The second groove 314 is arc-shaped, and a part of the low-voltage wire harness 90 is located in the second groove 314.

[0164] The embodiment of the present application further provides an electrical device, including the battery device 100 according to any of the above embodiments.

[0165] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: A box body, including box body walls, and the box body walls are the side walls of the box body; Battery cells, arranged inside the box body; A bracket, arranged inside the box body and connected to the box body walls, and the bracket forms a channel; A high-voltage box, arranged inside the box body; A connector, arranged on the box body; An electrical connection member, electrically connecting the high-voltage box and the connector, at least part of the electrical connection member is arranged inside the channel, and the electrical connection member is fixed to the box body walls through the bracket; Wherein, a first protective layer is arranged on the inner wall of the channel.

2. The battery device according to claim 1, wherein The first protective layer includes a buffer layer, and the buffer layer is in contact with the electrical connection member.

3. The battery device according to claim 2, wherein The buffer layer is in interference fit with the electrical connection member.

4. The battery device according to claim 2, wherein The first protective layer further includes an intermediate layer, and the intermediate layer is located between the buffer layer and the inner wall of the channel; Wherein, the intermediate layer includes one or more of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer.

5. The battery device according to claim 1, wherein The bracket includes a body part and a fixing part, the channel is arranged in the body part, the fixing part is connected to the body part, and the fixing part is detachably connected to the box body walls.

6. The battery device according to claim 5, wherein The box body walls are provided with mounting holes; At least part of the fixing part passes through the mounting holes and is clamped with the box body walls.

7. The battery device according to claim 5, wherein The body part includes a first wall and two second walls oppositely arranged along a first direction, the second walls are connected to the first wall, the first wall and the box body walls are oppositely arranged along a second direction, the first wall and the two second walls enclose the channel, and the first direction is perpendicular to the second direction; The fixing part is connected to the second wall; Both sides of the electrical connection member along the second direction are respectively abutted against the first protective layer and the box body walls.

8. The battery device according to claim 5, wherein The body part includes a first wall and two second walls oppositely arranged along a first direction, and the second walls are connected to the first wall; The fixing part includes a bottom plate and mounting feet, the bottom plate is connected to the second wall, the first wall, the two second walls and the bottom plate enclose the channel, and the first protective layer is arranged on both opposite surfaces of the first wall and the bottom plate along the second direction, and the first direction is perpendicular to the second direction; The mounting feet are connected to the bottom plate; Both sides of the electrical connection member along the second direction are respectively abutted against the two first protective layers.

9. The battery device according to claim 8, wherein The bottom plate includes a third wall and two fourth walls oppositely arranged along the first direction, the third wall is opposite to the first wall along the second direction, and the fourth walls are connected to the third wall; Wherein, one of the second wall and the fourth wall is provided with a first groove, and the other is a protrusion, and the protrusion is embedded in the first groove.

10. The battery device according to claim 9, wherein the protrusion is in interference fit with the first groove.

11. The battery device according to any one of claims 5-10, wherein the bracket further includes at least one fixing strap, and the fixing strap is connected to the body portion for fixing the wire harness.

12. The battery device according to claim 11, wherein the fixing strap includes a strap body and a fixing seat, the fixing seat is connected to the body portion, one end of the strap body is connected to the body portion, the other end of the strap body passes through the fixing seat, the fixing seat is provided with first teeth, and the strap body is provided with second teeth that cooperate with the first teeth.

13. The battery device according to claim 12, wherein a second protective layer is provided on the strap body, and the second protective layer contacts the wire harness.

14. The battery device according to claim 11, wherein a second groove is provided in the body portion, and a part of the wire harness is located in the second groove.

15. An electrical device, characterized in that, Comprising: The battery device according to any one of claims 1-14.

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