Battery device and electric device

Abstract

The invention provides a battery device and a power utilization device, and the battery device comprises a box body which comprises a box body wall; the battery monomers are arranged in the box body; the support is arranged in the box body and connected with the wall of the box body, and a channel is formed in the support; the electric connecting piece is at least partially arranged in the channel; wherein a first protective layer is arranged on the inner wall of the channel. The installation efficiency and reliability of the battery device can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular 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 electronic equipment, electric vehicles, electric two-wheeled vehicles, power tools, etc. As the application of battery devices becomes more and more extensive, higher requirements are placed on the installation efficiency and reliability of battery devices. Summary of the invention

[0003] The embodiments of the present application provide a battery device and an electrical device to improve installation efficiency and reliability.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising: a box body, including a box body wall; a battery cell, arranged in the box body; a bracket, arranged in the box body and connected to the box body wall, the bracket forming a channel; an electrical connector, at least partially arranged in the channel; wherein the inner wall of the channel is provided with a first protective layer.

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

[0006] In some embodiments, the first protection layer includes a buffer layer, and the buffer layer is in contact with the electrical connection.

[0007] By having the first protective layer include a buffer layer, the buffer layer is in contact with the electrical connector, which can reduce the degree of wear of the electrical connector and improve the protection capability of the electrical connector, thereby improving the reliability of the battery device.

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

[0009] In this way, the electrical connector can be fixed more securely, the risk of shaking of the electrical connector can be reduced, and the reliability can be further improved.

[0010] In some embodiments, 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.

[0011] Since the first protection layer also includes an intermediate layer, multiple protections can be provided to the electrical connector, thereby further improving the reliability of the electrical connector.

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

[0013] The fixing part is detachably connected to the box wall, which facilitates the maintenance and replacement of the electrical connector and improves convenience.

[0014] In some embodiments, the box wall is provided with a mounting hole; the fixing portion at least partially passes through the mounting hole and is clamped with the box wall.

[0015] By passing the fixing part through the installation hole and clamping it with the wall of the box body, quick installation can be achieved and the installation efficiency is improved.

[0016] In some embodiments, the main body portion includes a first wall and two second walls arranged opposite to each other along a first direction, the second wall is connected to the first wall, the first wall and the box wall are arranged opposite to each other along a second direction, the first wall and the two second walls form the channel, and the first direction is perpendicular to the second direction; the fixing portion is connected to the second wall; and the electrical connector abuts against the first protective layer and the box wall on both sides along the second direction.

[0017] The bracket forms a channel, and the bracket and the box wall cooperate to fix the electrical connector, which utilizes the wall space of the box wall without taking up additional space, which is beneficial to the utilization rate of the internal space of the box and also helps to reduce the material cost of the bracket.

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

[0019] The main body and the bottom plate together form a channel to fix the electrical connector, and the bracket is fixed to the box wall through the fixing part, thereby being able to adapt to the complex installation environment in the box and improving the adaptability.

[0020] In some embodiments, the base plate includes a third wall and two fourth walls arranged opposite to each other along the first direction, the third wall is opposite to the first wall along the second direction, and the fourth wall is 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, the main body and the bottom plate can be quickly connected, and the two first protective layers are conducive to better squeezing and fixing the electrical connector, thereby improving the stability of the electrical connector.

[0022] In some embodiments, the protrusion is interference fit with the first groove.

[0023] As a result, the risk of separation between the main body and the bottom plate is reduced, the connection reliability is improved, and the stability of the electrical connector is improved.

[0024] In some embodiments, the bracket further includes at least one fixing strap, which is connected to the main body and is used to fix the wiring harness.

[0025] Since the bracket also includes a fixing strap for fixing the wiring harness, one bracket can fix the electrical connector and the wiring harness at the same time, and the electrical connector (such as a high-voltage electrical connector) and the wiring harness (such as a low-voltage wiring harness) are separated and fixed, eliminating the risk of damage caused by friction between the two when they are bundled together in the past, and further improving reliability.

[0026] In some embodiments, the fixed cable tie includes a belt body and a fixing seat, the fixing seat is connected to the main body, one end of the belt body is connected to the main body, and the other end of the belt body is passed through the fixing seat, the fixing seat is provided with a first tooth, and the belt body is provided with a second tooth that cooperates with the first tooth.

[0027] The belt body is passed through the fixing seat, and the second teeth on the belt body cooperate with the first teeth on the fixing seat, so that the wire harness can be firmly fixed to the bracket.

[0028] In some embodiments, a second protective layer is disposed on the belt body, and the second protective layer is in contact with the wire harness.

[0029] By arranging a second protective layer on the belt body, the second protective layer is in contact with the wire harness, which can reduce the risk of the wire harness shaking, thereby effectively protecting the wire harness.

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

[0031] By providing the second groove on the main body, the contact area between the wire harness and the main body can be increased, thereby improving the stability of the wire harness, facilitating the installation of the wire harness, and improving the installation efficiency.

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

[0033] Therefore, 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 embodiment of the present application provides an electrical device, comprising a battery device according to any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope.

[0036] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application; Figure 2 A schematic diagram of the structure of a box provided in some embodiments of the present application; Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application; Figure 4 A schematic diagram of the structure inside the box provided in some embodiments of the present application; Figure 5 A schematic diagram of the structure of a bracket provided in some embodiments of the present application; Figure 6 for Figure 4 Cross-sectional view at the AA position; Figure 7 A schematic diagram of the structure of a bracket provided in some other embodiments of the present application; Figure 8 A partial enlarged schematic diagram of the structure of a bracket provided in some other embodiments of the present application; Fig. 9 A schematic diagram of a structure of a bracket fixing electrical connector provided in other embodiments of the present application; Fig.10 for Fig. 9 Cross-section view at the mid-BB position; Fig.11 Another cross-sectional view of the bracket provided for some embodiments of the present application, wherein the first protective layer is omitted.

[0037] icon: 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-shell; 211-shell; 212-end cover; 22-electrode assembly; 221-electrode body; 222-ear; 23-electrode terminal; 30-bracket; 30a-channel; 31-body; 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-belt body; second tooth 343; 342-fixing seat; first tooth 344; 35 - first protective layer; 351 - buffer layer; 352 - middle layer; 40 - electrical connector; 60 - second protective layer; 70 - high voltage box; 80 - connector; 90 - wiring harness. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the text of this application and any variations thereof are intended to cover non-exclusive inclusions.

[0040] 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 a primary-secondary relationship.

[0041] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", 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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0044] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0045] 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, in parallel or in mixed connection through a busbar.

[0046] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0047] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0048] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0049] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0050] As an example, the box may include a first sub-box and a second sub-box. The first sub-box and the second sub-box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first sub-box can be a top cover or a bottom plate.

[0051] 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.

[0052] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0053] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0054] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0055] The battery cells may be, but are not limited to, lithium ion batteries, sodium ion batteries, sodium lithium ion batteries, lithium metal batteries, sodium metal batteries, lithium sulfur batteries, magnesium ion batteries, nickel hydrogen batteries, nickel cadmium batteries, lead storage batteries, etc.

[0056] A 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 removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0057] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0058] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0059] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium with surface silver plating may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (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.).

[0060] 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 positive electrode active materials for batteries may also be used.

[0061] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0062] 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 electrode, carbon, nickel or titanium, etc. may be used.

[0063] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0064] As an example, the negative electrode active material may adopt the negative electrode active material for the battery 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, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0065] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0066] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.

[0067] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0068] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0069] In some embodiments, the electrode assembly is a laminate structure.

[0070] 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 may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0071] In some embodiments, the housing includes an end cap and a shell, the shell is provided with an opening, and the end cap closes the opening to form a closed space for accommodating substances such as the electrode assembly and the electrolyte. The shell may be provided with one or more openings. One or more end caps may also be provided.

[0072] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the electrode tab of the electrode assembly. The electrode terminal may be directly connected to the electrode tab, or may be indirectly connected to the electrode tab through an adapter. The electrode terminal may be disposed on the end cap, or may be disposed on the housing.

[0073] In some embodiments, an explosion-proof valve is provided on the housing, and the explosion-proof valve is used to release the internal pressure of the battery cell.

[0074] In some embodiments, the housing may be a sealed structure or a non-sealed structure. As an example, when the housing is a sealed structure, the housing may protect the electrode assembly and prevent leakage of electrolyte. When the housing is a non-sealed structure, the housing may protect the electrode assembly, and a sealing bag may be included between the housing and the electrode assembly, the sealing bag being used to encapsulate the electrode assembly and the electrolyte. Specifically, the sealing bag may be a bag-shaped insulating member or an aluminum-plastic film.

[0075] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack 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 polygonal battery, such as a hexagonal battery.

[0076] The development of battery device technology must take into account multiple design factors at the same time, such as performance parameters such as energy density, discharge capacity, and charge and discharge rate. In addition, the installation efficiency and reliability of the battery device must also be considered.

[0077] In a battery device, electrical connectors play an indispensable role and are used to connect two components to achieve electrical connection. For example, the high-voltage electrical connectors used to connect the high-voltage box and the connector in the battery device cannot meet the clearance requirements between the high-voltage connectors and the other components due to the relatively tight internal space of the battery device. Therefore, it is necessary to wrap the outer surface of the high-voltage electrical connector with wear-resistant mesh tubes, foam and other protective parts to reduce the degree of wear between the high-voltage electrical connector and other parts due to frequent vibration or relative displacement, so as to ensure the normal operation of the high-voltage electrical connector. Since high-voltage electrical connectors are usually long, this manual winding method requires a lot of time and manpower. In the process of large-scale production, it leads to low installation efficiency and increased production costs. In addition, the quality of manual winding is difficult to guarantee a uniform standard, and the protection effect may be uneven due to the different proficiency of the operators, and the electrical connectors cannot be reliably protected, which ultimately leads to poor reliability of the battery device.

[0078] In this regard, the present application provides a bracket with a channel and a protective layer on the inner wall of the channel. The electrical connector is accommodated in the channel and fixed to the box through the bracket. This can not only protect the electrical connector well, but also quickly fix the electrical connector to the box, thereby improving the installation efficiency and reliability of the battery device.

[0079] The battery cells and battery devices disclosed in the embodiments of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. The power supply system of the electrical device can be composed of the battery cells and battery devices disclosed in the present application.

[0080] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0081] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0082] Reference Figure 1 The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be disposed at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1000.

[0083] The vehicle 1000 may further include a controller 200 and a motor 300 , wherein 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 starting, navigating, and driving the vehicle 1000 .

[0084] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0085] Reference Figure 2 The battery device 100 includes a box body 10 and a battery cell 20, and the battery cell 20 is contained in the box body 10. The box body 10 is used to provide a storage space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first sub-box body 11 and a second sub-box body 12, and 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 a storage space 101 for accommodating the battery cell 20. The second sub-box body 12 may be a hollow structure with one end open, and the first sub-box body 11 may be a plate-shaped structure, and 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 a storage space; the first sub-box body 11 and the second sub-box body 12 may also 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.

[0086] In the battery device 100, there can be multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0087] Reference 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.

[0088] The shell 211 is a component used to cooperate 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 shell 211 and the end cap 212 can be independent components. The shell 211 can be of various shapes and sizes. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 22. The material of the shell 211 can be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0089] The end cap 212 refers to a component that covers the opening of the shell 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 shell 211 to match the shell 211. Optionally, the end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 212 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals 23 can be provided on the end cap 212. The electrode terminal can be used to electrically connect to the electrode assembly for outputting or inputting the electrical energy of the battery cell. The material of the end cap 212 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any 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 shell 211 from the end cap 212 to reduce the risk of short circuit. Exemplarily, the insulating structure may be plastic, rubber, or the like.

[0090] The electrode assembly 22 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 22 may be included in the housing 211. The electrode assembly 22 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the electrode body 221 of the electrode assembly 22, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the tabs 222. The positive tab and the negative tab may be located together at one end of the electrode body 221 or respectively at both ends of the electrode body 221.

[0091] The following reference Figures 4 to 11 , the battery device 100 of the embodiment of the present application is described in detail.

[0092] The 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, arranged in the box body 10; a bracket 30, arranged in 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 arranged in the channel 30a; wherein the inner wall of the channel 30a is provided with a first protective layer 35.

[0093] The box wall 111 can be any wall in the box 10, such as a side wall, a bottom wall, a top wall, etc. As an example, refer to Figure 4 The box wall 111 is the side wall of the box 10 .

[0094] The bracket 30 is used to protect and fix the electrical connector 40. The bracket 30 is connected to the box wall 111, so that the electrical connector 40 is fixed to the box wall 111 through the bracket 30. The bracket 30 and the box wall 111 can be connected in various ways, such as clamping, bonding, riveting, bolting, etc.

[0095] The support 30 is formed with a channel 30a, and the channel 30a is used to receive the electrical connector 40. The electrical connector 40 may be partially located in the channel 30a, or may be completely located in the channel 30a. Figure 4 , the two ends of the electrical connector 40 pass through the channel 30a respectively, the majority of the electrical connector 40 is accommodated in the channel 30a, and the two ends of the electrical connector 40 are electrically connected to the high voltage box 70 and the connector 80 respectively. The connector 80 can be the 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 it can be an open structure with openings at both ends and one side. The openings at both ends of the channel 30a facilitate the passage of the two ends of the electrical connector 40.

[0096] The inner wall of the channel 30a is provided with a first protective layer 35, and the first protective layer 35 is used to protect the electrical connector 40. The first protective layer 35 can be attached to the inner wall of the channel 30a, or it can be 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 it can cover part of the inner wall of the channel 30a. The first protective layer 35 can be a multi-layer structure, for example, two layers, three layers or more layers. The first protective layer 35 can also be a single-layer structure.

[0097] As an example, the extension direction Z of the channel 30a can be consistent with the extension direction of the electrical connector 40, so that the bracket 30 can fully protect the electrical connector 40. For example, the electrical connector 40 extends into a straight line, and the channel 30a can also extend into a straight line. The electrical connector 40 extends into a bent shape (such as an L shape), and the channel 30a can also extend into 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, which is easy to bend.

[0098] A channel 30a is formed by the bracket 30, and a first protective layer 35 is arranged in the channel 30a. The electrical connector 40 is at least partially 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 wall 111 through the bracket 30, which can improve the installation efficiency.

[0099] In some embodiments, reference Figure 6 The first protection layer 35 includes a buffer layer 351 , and the buffer layer 351 is in contact with the electrical connection member 40 .

[0100] The buffer layer 351 contacts the electrical connector 40, and the buffer layer 351 can wrap at least a portion of the electrical connector 40. When the electrical connector 40 is vibrated and relatively displaced, the buffer layer 351 can play a certain role in buffering and shock absorption. The buffer layer 351 can be foam, rubber, etc.

[0101] The first protection layer 35 includes the buffer layer 351 , and the buffer layer 351 is in contact with the electrical connector 40 , which can reduce the wear of the electrical connector 40 and improve the protection capability of the electrical connector 40 , thereby improving the reliability of the battery device 100 .

[0102] In some embodiments, the buffer layer 351 is interference fit with the electrical connector 40 .

[0103] The buffer layer 351 has a certain elasticity. When the bracket 30 is installed, the buffer layer 351 is in a compressed state, exerting a certain elastic force on the electrical connector 40, so that the electrical connector 40 is tightly fitted with the buffer layer 351 to form an interference fit.

[0104] As a result, the electrical connector 40 can be fixed more securely, reducing the risk of shaking of the electrical connector 40 and further improving reliability.

[0105] In some embodiments, reference Figure 6 The first protective layer 35 also includes an intermediate layer 352, which 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.

[0106] The middle layer 352 may be one layer or multiple layers. When the middle layer 352 is one layer, the middle layer 352 may be any one of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer. When the middle layer 352 is multiple layers, the middle layer 352 may be at least two of the fireproof layer, the heat dissipation layer, and the electromagnetic shielding layer. The layers may be bonded or laminated to each other. As an example, the middle layer 352 includes a fireproof layer, and the fireproof layer may be closer to the bracket 30 than other layers.

[0107] 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 a plastic with a conductive coating on the surface.

[0108] Since the first protection layer 35 further includes the intermediate layer 352 , multiple protections can be provided to the electrical connector 40 , thereby further improving the reliability of the electrical connector 40 .

[0109] In some embodiments, the bracket 30 includes a main body portion 31 and a fixing portion 32 , the channel 30 a is disposed in the main body portion 31 , the fixing portion 32 is connected to the main body portion 31 , and the fixing portion 32 is detachably connected to the box wall 111 .

[0110] The main body portion 31 is a portion of the bracket 30 mainly used for accommodating the electrical connector 40 . The extension direction Z of the main body portion 31 may be the same as the extension direction of the electrical connector 40 . Figure 5 2 shows an example in which the main body portion 31 extends in a straight line.

[0111] The fixing portion 32 is a connection structure in the bracket 30, and the bracket 30 is detachably connected to the box wall 111 through the fixing portion 32. There are many ways of detachable connection, such as clamping, riveting, bolting, etc.

[0112] The number of the fixing portion 32 may be one or more. When there are multiple fixing portions 32 , the multiple fixing portions 32 may be arranged at intervals along the extension direction of the bracket 30 .

[0113] The fixing portion 32 is detachably connected to the box wall 111, so that the electrical connector 40 can be easily repaired and replaced, thereby improving convenience.

[0114] In some embodiments, the box wall 111 is provided with a mounting hole 112 ; the fixing portion 32 at least partially passes through the mounting hole 112 and is engaged with the box wall 111 .

[0115] The box wall 111 is provided with a mounting hole 112, and the position of the mounting hole 112 corresponds to the position of the fixing portion 32. During installation, the electrical connector 40 can be firstly inserted into the channel 30a, and then the fixing portion 32 on the bracket 30 is aligned with the mounting hole 112 and the bracket 30 is pressed, so that the fixing portion 32 passes through the mounting hole 112 and is engaged with the box wall 111.

[0116] As an example, see Figure 5 and Figure 6 The fixing portion 32 may include a plurality of mounting feet 36, and the plurality of mounting feet 36 are spaced apart along the extension direction Z of the main body portion 31. Each mounting foot 36 may include a main body portion and a claw portion, the claw portion is connected to the main body portion, the main body portion passes through the corresponding mounting hole 112, and the claw portion abuts against the box wall 111.

[0117] The fixing portion 32 is passed through the mounting hole 112 and is engaged with the box wall 111 , so that quick installation can be achieved and installation efficiency is improved.

[0118] In some embodiments, reference Figure 5 and Figure 6 The main body 31 includes a first wall 311 and two second walls 312 arranged opposite to each other along the first direction X, the second wall 312 is connected to the first wall 311, the first wall 311 and the box wall 111 are arranged opposite to each other along the second direction Y, the first wall 311 and the two second walls 312 form a channel 30a, the first direction X is perpendicular to the second direction Y; the fixing portion 32 is connected to the second wall 312; the electrical connector 40 abuts against the first protective layer 35 and the box wall 111 on both sides along the second direction Y.

[0119] As an example, the first wall 311 may be the bottom wall of the body portion 31, and the second wall 312 may be the side wall of the body portion 31. The first wall 311 and the two second walls 312 enclose a channel 30a with an opening on one side. The fixing portion 32 may be a mounting foot 36, the mounting foot 36 is connected to an end of the second wall 312 away from the first wall 311, and the fixing portion 32 extends along the second direction Y. The first wall 311, the two second walls 312 and the fixing portion 32 may be integrally formed. Figure 5 and Figure 6 In the example shown, the fixing portion 32 is a mounting foot 36 , the mounting foot 36 is connected to the main body 31 , and the main body 31 is detachably connected to the box wall 111 via the mounting foot 36 .

[0120] During installation, the fixing portion 32 is aligned with the mounting hole 112 on the box wall 111, and the bracket 30 is pressed along the second direction Y to allow the fixing portion 32 to pass through the mounting hole 112 and engage with the box wall 111. At this time, the box wall 111 covers the opening of the channel 30a, and the two sides of the electrical connector 40 along the second direction Y are respectively in contact with the first protective layer 35 and the box wall 111. For example, the electrical connector 40 is pressed against the box wall 111 by the buffer layer 351 in the first protective layer 35.

[0121] Thus, the bracket 30 is used to enclose a channel 30a with an opening on one side, and the bracket 30 and the box wall 111 cooperate to fix the electrical connector 40, thereby utilizing the wall space of the box wall 111. This is suitable for situations where the wall space of the box wall 111 is sufficient, and can reduce the material cost of the bracket 30.

[0122] In some embodiments, reference Figure 7 , Figure 8 , Fig. 9 and Fig.10 The main body 31 includes a first wall 311 and two second walls 312 arranged opposite to each other along the first direction X, and the second wall 312 is 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 form a channel 30a, and the first wall 311 and the bottom plate 33 are provided with a first protective layer 35 on both sides opposite to each other along the second direction Y, and the first direction X is perpendicular to the second direction Y; the mounting foot 36 is connected to the bottom plate 33; the electrical connector 40 is respectively abutted against the two first protective layers 35 on both sides along the second direction Y.

[0123] As an example, the first wall 311 may be the bottom wall of the body 31, and the second wall 312 may be the side wall of the body 31. The first wall 311 and the two second walls 312 enclose a channel 30a with an opening on one side, and the bottom plate 33 covers the opening of the channel 30a. The body 31 and the bottom plate 33 together form an annular channel 30a.

[0124] Figure 7 , Figure 8 , Fig. 9 and Fig.10 In the example shown, the fixing portion 32 includes a bottom plate 33 and mounting feet 36 . The fixing portion 32 is connected to the main body 31 via the bottom plate 33 , and the fixing portion 32 is detachably connected to the box wall 111 via the mounting feet 36 .

[0125] When the wall space of the box wall 111 is insufficient, the main body 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 wall 111 through the fixing portion 32, thereby being able to adapt to the complex installation environment in the box 10 and improving the adaptability.

[0126] In some embodiments, the base plate 33 includes a third wall 331 and two fourth walls 332 arranged opposite to each other along the first direction X, the third wall 331 is opposite to the first wall 311 along the second direction Y, and the fourth wall 332 is connected to the third wall 331; wherein, one of the second wall 312 and the fourth wall 332 is provided with a first groove 313, and the other is a protrusion, and the protrusion is embedded in the first groove 313.

[0127] A 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 may be embedded in the first groove 313 as a protrusion; a first groove may also be provided at one end of the fourth wall 332 away from the third wall 331 , and the second wall 312 may be embedded in the first groove 313 as a protrusion.

[0128] As an example, two fourth walls 332 are respectively connected to the two sides of the third wall 331 along the first direction X, and the fourth wall 332 extends along the second direction Y. The fourth wall 332 can be integrally formed with the third wall 331. During installation, the fourth wall 332 is embedded in the corresponding first groove 313 along the second direction Y, so that the body part 31 and the bottom plate 33 are mutually buckled to form a channel 30a, and the electrical connector 40 is squeezed between the two first protective layers 35 (such as buffer layers) to fix the electrical connector 40.

[0129] By embedding the protrusion into the first groove 313 , the main body 31 and the bottom plate 33 can be quickly connected, and the two first protective layers 35 are conducive to squeezing and fixing the electrical connector 40 , thereby improving the stability of the electrical connector 40 .

[0130] In some embodiments, the protrusion is interference fit with the first groove 313 .

[0131] When the protrusion is embedded in the first groove 313 , there is a certain interference between the protrusion and the first groove 313 , which reduces the risk of separation between the main body 31 and the bottom plate 33 and improves the connection firmness.

[0132] In some embodiments, reference Fig.11 The bracket 30 also includes at least one fixing strap 34 , which is connected to the main body 31 and is used to fix the wiring harness 90 .

[0133] The number of the fixing straps 34 may be one or more. When there are multiple fixing straps 34 , the multiple fixing straps 34 may be distributed at intervals along the extension direction Z of the main body 31 .

[0134] It can be understood that the fixing strap 34 is located outside the channel 30a. For example, the fixing strap 34 is connected to a side of the first wall 311 of the body portion 31 away from the channel 30a.

[0135] The wiring harness 90 may be a low-voltage wiring harness 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 .

[0136] Since the bracket 30 also includes a fixing strap 34 for fixing the wiring harness 90, one bracket 30 can fix the electrical connector 40 and the wiring harness 90 at the same time, and the electrical connector 40 (such as a high-voltage electrical connector) and the wiring harness 90 (such as a low-voltage wiring harness) are separated and fixed, eliminating the risk of damage caused by friction between the two when they are bundled together in the past, and further improving reliability.

[0137] In some embodiments, the fixed cable tie 34 includes a belt body 341 and a fixing seat 342, the fixing seat 342 is connected to the main body 31, one end of the belt body 341 is connected to the main body 31, and the other end of the belt body 341 is passed through the fixing seat 342, the fixing seat 342 is provided with a first tooth 344, and the belt body 341 is provided with a second tooth 343 that cooperates with the first tooth 344.

[0138] The belt body 341 is passed through the fixing seat 342 , and the second teeth 343 on the belt body 341 cooperate with the first teeth 344 on the fixing seat 342 , so that the wire harness 90 is firmly fixed to the bracket 30 .

[0139] In some embodiments, a second protective layer 60 is disposed on the belt body 341 , and the second protective layer 60 is in contact with the wire harness 90 .

[0140] The second protective layer 60 is used to protect the wiring harness 90. The second protective layer 60 can be adhered to the inner wall of the belt body 341, or can be coated on the inner wall of the belt 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. For example, the second protective layer 60 includes a buffer layer, and the buffer layer can be a rubber pad.

[0141] By providing the second protective layer 60 on the belt body 341 and the second protective layer 60 being in contact with the wire harness 90 , the risk of shaking of the wire harness 90 can be reduced, thereby effectively protecting the wire harness 90 .

[0142] In some embodiments, the body portion 31 is provided with a second groove 314 , and a portion of the wire harness 90 is located in the second groove 314 .

[0143] The shape of the second groove 314 can be adapted to the outer surface shape of the wire harness 90 , for example, an arc shape. The second groove 314 can guide the wire harness 90 so that the wire harness can pass through the fixing strap 34 smoothly.

[0144] By providing the second groove 314 on the main body 31 , the contact area between the wire harness 90 and the main body 31 can be increased, thereby improving the stability of the wire harness 90 , facilitating the installation of the wire harness 90 , and improving the installation efficiency.

[0145] Below, refer to Figures 4 to 11 , specific examples of this application are described.

[0146] The embodiment of the present application provides a battery device 100 , including a box 10 , a battery cell 20 , a bracket 30 , and an electrical connector 40 .

[0147] The box body 10 includes a box body wall 111, which may be a side wall of the box body 10. The bracket 30 is formed with a channel 30a for accommodating an electrical connector 40, which is a high-voltage electrical connector for connecting the high-voltage box 70 and the connector 80, and the electrical connector 40 passes through both ends of 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 may 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 may be a foam layer. The intermediate layer 352 may be one or more of a fireproof layer, a heat dissipation layer, and an electromagnetic shielding layer. The fireproof layer may be a ceramic layer, a composite ceramic layer, a mica layer, a glass fiber layer, etc. The heat dissipation layer may be a graphite layer, a metal layer (aluminum, copper), etc. The electromagnetic shielding layer can be a metal fiber layer or a plastic with a conductive coating on the surface, etc. Thus, the fireproof, wear-resistant, buffering and other protective functions of the electrical connector 40 are realized, thereby achieving the purpose of reducing artificial winding on the electrical connector 40 and adding an outer layer of protection.

[0148] According to different installation environments inside the box 10, the bracket 30 can be of two types, namely, the face pressing type and the separate push-pull type. The face pressing type is suitable for the case where the wall surface of the box wall 111 is large. The separate push-pull type is suitable for the case where the wall surface of the box wall 111 is small and the installation environment is complex.

[0149] Reference Figures 4 to 6, shows a veneer press-type bracket 30, including a main body 31 and a fixing part 32. The main body 31 has a first wall 311 and two second walls 312 opposite to each other along a first direction X. The second wall 312 is connected to the first wall 311. The first wall 311 and the two second walls 312 form a channel 30a with an opening on one side (open). There are multiple fixing parts 32, and the multiple fixing parts 32 are distributed at intervals along the extension direction Z of the main body 31. The fixing part 32 is connected to one 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 claws thereon. The box wall 111 is provided with mounting holes 112 corresponding to the multiple fixing parts 32 one by one. During installation, the fixing portion 32 is aligned with the corresponding mounting hole 112, and the bracket 30 is pressed along the second direction Y so that the fixing portion 32 passes through the mounting hole 112 and is engaged with the box wall 111. At this time, the box wall 111 covers the opening of the channel 30a to press the electrical connector 40 against the buffer layer 351 and the wall surface of the box wall 111 on both sides along the second direction Y.

[0150] Reference Figures 7 to 10 , shows a separated push-pull bracket 30, including a body part 31 and a base, the base including a bottom plate 33 and a fixing part 32 arranged on the bottom plate 33. The body part 31 has a first wall 311 and two second walls 312 opposite to each other along a first direction X, the second wall 312 is connected to the first wall 311, and a first groove 313 is arranged at one 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 are respectively embedded in the corresponding first grooves 313 as protrusions, and are over-matched 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 both opposite surfaces are provided with a buffer layer 351. During installation, the main body 31 and the bottom plate 33 cover each other to push the fourth wall 332 into the first groove 313, so that the main body 31 and the bottom plate 33 together form an annular channel 30a, and the electrical connector 40 is firmly squeezed between the two buffer layers 351. Then, the bracket 30 is clamped and fixed to the mounting hole 112 on the box wall 111 through the fixing part 32.

[0151] Reference Fig.11 The bracket 30 may further include an extension portion connected to the main body 31, the extension portion is a fixing strap 34, which is used to fix the low-voltage wire harness 90, and the inner wall of the fixing strap 34 is also provided with a second protective layer 60, which is a rubber pad. The outer surface of the main body 31 is provided with a second groove 314, the second groove 314 is arc-shaped, and the low-voltage wire harness 90 is partially located in the second groove 314.

[0152] The embodiment of the present application further provides an electrical device, comprising the battery device 100 as described in any of the above embodiments.

[0153] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body, including a box body wall; A battery cell is disposed in the box; A bracket is disposed in the box and connected to the wall of the box, and the bracket forms a channel; an electrical connector, at least partially disposed within the passage; Wherein, the inner wall of the channel is provided with a first protective layer.

2. The battery device according to claim 1, characterized in that: The first protection 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, characterized in that: The buffer layer is interference-fitted with the electrical connector.

4. The battery device according to claim 2, characterized in that: The first protective layer further comprises 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, characterized in that: The bracket comprises a main body and a fixing part, the channel is arranged on the main body, the fixing part is connected to the main body, and the fixing part is detachably connected to the box wall.

6. The battery device according to claim 5, characterized in that: The box wall is provided with a mounting hole; At least a portion of the fixing portion passes through the mounting hole and is clamped with the box wall.

7. The battery device according to claim 5, characterized in that: The main body comprises a first wall and two second walls arranged opposite to each other along a first direction, the second wall is connected to the first wall, the first wall and the box wall are arranged opposite to each other 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 portion is connected to the second wall; Two sides of the electrical connector along the second direction are respectively in contact with the first protective layer and the box wall.

8. The battery device according to claim 5, characterized in that: The main body comprises a first wall and two second walls arranged opposite to each other along a first direction, wherein the second walls are connected to the first wall; The fixing portion includes a bottom plate and a mounting foot, the bottom plate is connected to the second wall, the first wall, the two second walls and the bottom plate form the channel, the first protective layer is provided on both sides of the first wall and the bottom plate that are opposite to each other along the second direction, and the first direction is perpendicular to the second direction; The mounting foot is connected to the base plate; Two sides of the electrical connector along the second direction are respectively in contact with the two first protective layers.

9. The battery device according to claim 8, characterized in that: The bottom plate comprises a third wall and two fourth walls arranged opposite to each other along the first direction, the third wall is opposite to the first wall along the second direction, and the fourth wall is connected to the third wall; 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, characterized in that: The protrusion is interference fit with the first groove.

11. The battery device according to any one of claims 5 to 10, characterized in that: The bracket further comprises at least one fixing strap, which is connected to the main body and is used to fix the wiring harness.

12. The battery device according to claim 11, characterized in that: The fixed cable tie includes a belt body and a fixing seat, wherein the fixing seat is connected to the main body, one end of the belt body is connected to the main body, and the other end of the belt body is passed through the fixing seat, the fixing seat is provided with a first tooth, and the belt body is provided with a second tooth matching the first tooth.

13. The battery device according to claim 12, characterized in that: A second protective layer is arranged on the belt body, and the second protective layer is in contact with the wiring harness.

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

15. The battery device according to claim 1, characterized in that: The battery device further comprises: A high-voltage box is arranged in the box; A connector, arranged on the box; The electrical connection piece connects the high voltage box and the connector.

16. An electrical device, characterized in that: include: A battery device as claimed in any one of claims 1 to 15.

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