Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a box body, single batteries and a power distribution device, and the single batteries are arranged in the box body; the power distribution device is arranged in the box body, the power distribution device comprises a shell and a connecting terminal, the shell is a concrete structure body, and the connecting terminal is arranged in the shell and is used for being electrically connected with the battery monomers. The reliability of the battery device can be improved on the premise that the power distribution function requirement is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, and particularly provides a battery device and a power utilization device. BACKGROUND

[0002] At present, the power distribution device (such as a high-voltage distribution box) in the battery device usually adopts a plastic shell to integrate and package electrical components such as relays, fuses and connection terminals. The plastic shell has good insulation and easy processability, but has limited high-temperature resistance. When the electrical components have faults such as overcurrent or short circuit, the plastic shell will melt, deform or even burn, lose insulation and structural support functions, thereby causing internal short circuit, sparking and other faults of the battery device, and affecting the reliability of the battery device. CONTENT OF THE UTILITY MODEL

[0003] In view of the above technical problems, the purpose of the embodiments of the present application is to provide a battery device and a power utilization device, aiming to solve the problem of poor reliability of the existing battery device.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising:

[0006] a box body;

[0007] a battery monomer arranged in the box body;

[0008] a power distribution device arranged in the box body, the power distribution device comprising a shell and a connection terminal, the shell being a concrete structure, and the connection terminal being arranged in the shell and used for electrically connecting the battery monomer.

[0009] In the above technical scheme, the shell of the power distribution device is replaced from the traditional plastic shell to the concrete structure, which fully utilizes the high strength and fire resistance of the concrete structure, can play a role in wrapping and fixing and isolating the internal electrical components, and effectively overcomes the problem that the traditional plastic shell is easy to melt and deform to cause short circuit and sparking when the internal electrical components have abnormal conditions such as overcurrent and short circuit. And the connection terminal can be reliably electrically connected with the battery monomer. Therefore, the present application can improve the reliability of the battery device under the premise of meeting the power distribution function requirement.

[0010] In some embodiments, the power distribution device further comprises components arranged in the shell; the connection terminal comprises a main body portion arranged in the shell and a protruding portion protruding out of the shell, the main body portion is electrically connected with the components and the protruding portion respectively, and the protruding portion is electrically connected with the battery monomer.

[0011] In the technical solution, the electrical components are integrated in the concrete shell, and the connection terminal is designed as a segmented structure of a main body part and a protruding part, the main body part is electrically connected with the internal components, and the protruding part is electrically connected with the external battery monomer, so that a complete power distribution path is formed, and reliable power distribution function is realized.

[0012] In some embodiments, the power distribution device further comprises an insulation structure,

[0013] The insulation structure is arranged between the components and the shell; and / or,

[0014] The insulation structure is arranged between the main body part and the shell; and / or,

[0015] The insulation structure is arranged between the connection part of the main body part and the components and the shell.

[0016] In the technical solution, the insulation structure is arranged between the components and the concrete shell, between the main body part of the connection terminal and the concrete shell, and around the electrical connection node, which effectively compensates for the limitation of the insulation performance of the concrete material in a high-voltage or humid environment, improves the electrical isolation performance between the electrical components and the concrete shell, and thus improves the reliability of the battery device.

[0017] In some embodiments, the insulation structure is arranged between the components and the shell, and the insulation structure covers the surface of the components.

[0018] In the technical solution, the insulation structure is arranged between the components and the concrete shell, and the insulation structure is configured to completely cover the entire outer surface of the components, forming a continuous and complete electrical insulation barrier, which significantly improves the insulation reliability of the power distribution device.

[0019] In some embodiments, the insulation structure is arranged between the main body part and the shell, and the insulation structure covers the surface of the main body part.

[0020] In the technical solution, the insulation structure is arranged between the main body part of the connection terminal and the concrete shell, and the insulation structure is configured to completely cover the entire outer surface of the main body part, forming a continuous and complete electrical insulation barrier, which significantly improves the insulation reliability of the power distribution device.

[0021] In some embodiments, the insulation structure is arranged between the connection part of the main body part and the components and the shell, and the insulation structure covers the connection part of the main body part and the components.

[0022] In the technical solution, the insulation structure is arranged between the connection part of the main body part and the components and the shell, and the insulation structure is configured to completely cover the connection part, forming an insulation barrier for the electrical node, which significantly improves the insulation reliability of the power distribution device.

[0023] In some embodiments, the insulating structure comprises an insulating layer and / or an insulating cover.

[0024] In the above technical solution, the insulating layer and / or the insulating cover are provided, so as to further improve the electrical isolation performance between the concrete shell and the internal electrical components.

[0025] In some embodiments, the shell and the component are integrally formed; and / or, the shell and the main body part are integrally formed.

[0026] In the above technical solution, the concrete shell of the power distribution device and the main body part of the internal component and the connecting terminal are integrally formed by pouring, so as to improve the structural stability and sealing performance and simplify the assembly process.

[0027] In some embodiments, the battery device further comprises a first connecting member; the protruding part is provided with a first connecting hole, and the first connecting hole is used for electrically connecting the battery monomer through the first connecting member.

[0028] In the above technical solution, the first connecting hole provided on the protruding part of the connecting terminal and the first connecting member matched therewith can reliably electrically connect the protruding part and the battery monomer, so as to improve the reliability of the battery device.

[0029] In some embodiments, the battery device further comprises a second connecting member; the box body comprises a mounting plate, and the edge of the shell is provided with a second connecting hole, and the second connecting hole is used for connecting the mounting plate through the second connecting member.

[0030] In the above technical solution, through the above connecting structure, the power distribution device can be stably assembled, and convenient installation and quick replacement between the power distribution device and the battery box body can be realized.

[0031] In some embodiments, a first reinforcing member is arranged in the hole wall of the second connecting hole, and the second connecting member is arranged in the first reinforcing member.

[0032] In the above technical solution, by arranging the first reinforcing member in the second connecting hole, the structural strength of the connecting part can be improved, so as to avoid crushing of the connecting hole during fastening of the connecting member, thereby improving the connecting strength and reliability between the power distribution device and the box body.

[0033] In some embodiments, the first reinforcing member and the hole wall of the second connecting hole are integrally formed.

[0034] In the above technical solution, the first reinforcing member and the hole wall of the second connecting hole are integrally formed by a concrete pouring process. This structure enables the reinforcing member to be firmly combined with the concrete during solidification of the shell, effectively avoiding problems such as crushing of the shell or loosening of the reinforcing member caused by fastening of the connecting member during later assembly.

[0035] In some embodiments, the second reinforcing member is arranged in the concrete structure.

[0036] In the technical solution, the second reinforcing member is arranged in the concrete structure, so that the overall structural stability and damage resistance of the shell are improved, and the reliability of the battery device is improved.

[0037] In a second aspect, the embodiments of the present application also provide a power utilization device, comprising the battery device in the above embodiments, and the battery device is used to provide electric energy.

[0038] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the embodiments can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will describe the specific embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0040] Figure 1 The structural schematic diagram of the vehicle provided by the embodiments of the present application is shown in the figure.

[0041] Figure 2 The structural explosion diagram of the battery device provided by the embodiments of the present application is shown in the figure.

[0042] Figure 3 The structural schematic diagram of the power distribution device provided by the embodiments of the present application is shown in the figure.

[0043] Figure 4 The structural schematic diagram of the shell of the power distribution device provided by the embodiments of the present application is shown in the figure.

[0044] Figure 5 The structural schematic diagram of the components of the power distribution device provided by the embodiments of the present application is shown in the figure.

[0045] Figure 6 The structural schematic diagram of the first reinforcing member provided by the embodiments of the present application is shown in the figure.

[0046] Figure 7 The structural schematic diagram of the second reinforcing member provided by the embodiments of the present application is shown in the figure.

[0047] In the figure, each reference sign represents:

[0048] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0049] 11. The box;

[0050] 12. The battery cell;

[0051] 13. The power distribution device; 131, the housing; 1311, the second connecting hole; 132, the connecting terminal;

[0052] 1321, the main body portion; 1322, the protruding portion; 13221, the first connecting hole; 133, the relay;

[0053] 134, the fuse; 135, the first reinforcing member; 136, the second reinforcing member; 137, the first connecting member. DETAILED DESCRIPTION

[0054] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "include," "have," or "comprise" and variations thereof herein is intended to be equivalent to the term "comprising" and is used to mean the inclusion of the stated feature, but not the exclusion of any additional features. The use of the terms "first," "second," and the like does not imply any importance or any relative position.

[0056] In the description of the embodiments of the present application, the technical terms "first", "second", and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0057] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0058] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0059] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0060] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0061] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0062] With the rapid development of new energy vehicles, energy storage systems and other fields, the reliability of battery devices is increasingly valued. In existing battery devices, power distribution devices (such as high-voltage distribution boxes) are usually used to integrate relays, fuses, connection terminals and other electrical components to realize the distribution and protection control of the electrical energy of the battery monomer. At present, such power distribution devices generally use a shell made of PBT (polybutylene terephthalate), PA (polyamide) and other engineering plastics to encapsulate various electrical components, and use the good electrical insulation and molding process of plastic materials to realize the functions of structural support and electrical isolation.

[0063] However, in actual use, when the power distribution device occurs abnormal working conditions such as overcurrent and short circuit, the fuse may be severely fused or even burst due to sudden increase of current, generating high-temperature metal particles, arc or plasma jet. Since the heat-resistant temperature of the plastic shell is limited (usually below 200°C), it is easy to soften, melt or even burn under high-temperature impact, resulting in failure of the shell structure and loss of the isolation ability of the internal electrical components. Once the high-temperature molten material or splashed fragments come into contact with the adjacent connection terminals, battery poles or other conductive components, it is easy to cause electrical short circuit, arc striking, and in severe cases, it can cause thermal runaway, fire or even explosion, thereby affecting the reliability of the battery device operation.

[0064] Based on this, the application provides a concrete power distribution device. By replacing the plastic shell in the traditional power distribution device with a concrete structure, the high strength and fire resistance of the concrete structure are fully utilized, which can wrap and fix the internal electrical components and effectively overcome the problem of short-circuiting caused by the melting and deformation of the traditional plastic shell when the internal electrical components are in abnormal working conditions such as overcurrent and short circuit. And through the connection terminal, it can be reliably electrically connected with the battery monomer. The application can improve the reliability of the battery device while meeting the power distribution function requirements.

[0065] The battery device disclosed in the embodiments of the application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0066] The following embodiments are described with a power consumption device as a vehicle for convenience of description.

[0067] Referring to Figure 1 The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range extended car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0068] In some embodiments, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0069] Referring to Figure 2 The battery device mentioned in the embodiments of the application can include one or more battery monomer assemblies for providing voltage and capacity. The battery monomer assembly can include a plurality of battery monomers 12, and the plurality of battery monomers 12 are connected in series, parallel or mixed connection through the busbar component.

[0070] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 12.

[0071] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells 12 into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 12 by a cable tie.

[0072] In some embodiments, the battery device can be a battery pack, which includes a case 11 and one or more battery cell assemblies, which are accommodated in the case 11.

[0073] As an example, the battery cell assembly can be a battery module, which is accommodated in the case 11 by fixing the battery module in the case 11.

[0074] As an example, the battery cell assembly can also be accommodated in the case 11 by directly fixing a plurality of battery cells 12 in the case 11.

[0075] As an example, the case 11 can include a first case and a second case. The first case and the second case are buckled so that an enclosed space is formed inside the case 11 to accommodate the battery cell assembly. Here, the enclosed means covered or closed, which can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0076] As an example, the case 11 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the case 11 to accommodate the battery cell assembly.

[0077] In some embodiments, the case 11 can be part of the chassis structure of the vehicle 1000. For example, part of the case 11 can be at least part of the bottom plate of the vehicle 1000, or part of the case 11 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0078] The technical solutions described in the embodiments of the present application are applicable to various battery cell using electric devices, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, such as aircraft, rockets, space shuttles and spacecraft.

[0079] In the embodiments of the present application, the battery cell 12 can be a secondary battery, which means that the battery cell can be activated by charging after discharging. The battery cell 12 can be in the shape of a flat body, a cuboid or other shapes.

[0080] The battery cell 12 can be 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-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0081] The battery device and the power utilization device of the present application will be described in detail below in combination with specific embodiments. Figures 2 to 7

[0082] In some embodiments, as shown in Figures 2 to 5 The present application provides a battery device, which comprises a box body 11, a battery cell 12 and a power distribution device 13. The battery cell 12 is arranged in the box body 11. The power distribution device 13 is arranged in the box body 11 and comprises a shell 131 and a connecting terminal 132. The shell 131 is a concrete structure. The connecting terminal 132 is arranged in the shell 131 and is used for electrically connecting the battery cell 12.

[0083] The box body 11, as the shell of the battery device, can accommodate one or more battery cells 12. The box body 11 can be made of a material with certain strength, such as steel, aluminum, etc.

[0084] As shown in Figure 2 The battery cell 12 can be arranged in multiple in the box body 11, thereby forming one or more battery cell assemblies.

[0085] The power distribution device 13 usually integrates a relay 133, a fuse 134, a connecting terminal 132 and other electrical components, which are used for controlling the operation of a high-voltage circuit in the power utilization device. The "voltage" in the high-voltage circuit refers to the voltage, and the high-voltage circuit refers to a circuit with a voltage exceeding 60V. For example, the power distribution device 13 can be a high-voltage power distribution box, which can refer to a power source distribution and management device responsible for the high-voltage circuit in the power utilization device, such as a PDU (Power Distribution Unit) applied in a new energy vehicle. The function of the PDU is to be responsible for the power distribution and management of the high-voltage circuit in the new energy vehicle, to provide the whole vehicle with functions such as charge and discharge control, high-voltage component power-on control, circuit overload and short circuit protection, high-voltage sampling, low-voltage control, etc., to protect and monitor the operation of the high-voltage circuit. The high-voltage power distribution box can also refer to a component applied in the battery device and used for controlling the charge and discharge control of the battery, such as a BDU (Battery Disconnect Unit). The BDU is a high-voltage power distribution box designed for the battery and used for the charge and discharge control system of the battery.

[0086] ​The shell of the conventional power distribution device is usually made of engineering plastic, which has limited heat resistance and is easy to soften, melt or even burn when the fuse 134 bursts due to overcurrent. Therefore, the power distribution device 13 of the present application adopts a cast concrete structure as the shell 131, which has high structural strength and fire resistance (such as can withstand >1000℃ high temperature), can effectively wrap and fix the internal electrical components, and prevent them from splashing and shifting in a fault state. The concrete structure refers to a structure made of concrete material. Concrete structure refers to a composite material structure in which aggregates are cemented into a whole by cementitious materials. According to the different cementitious materials, concrete can include cement concrete, gypsum concrete, Portland cement concrete, water glass concrete, asphalt concrete, polymer concrete, etc. For example, cement concrete is a concrete obtained by mixing cement as a cementitious material, sand and gravel as aggregates, and water (which can contain additives and admixtures) in a certain proportion, and then stirring.

[0087] The connection terminal 132 refers to an electrically conductive component in the battery device for conducting current and achieving electrical connection between the power distribution device 13 and the battery cell 12 to meet the power distribution function requirement.

[0088] In some embodiments, the connection terminal 132 can include a pin, a wire, a copper bar, etc.

[0089] Optionally, the connection terminal 132 can use a copper bar (i.e. a flat copper conductive bar) as the conductive main body. Compared with the traditional pin or wire, it has a larger conductive cross-sectional area, lower contact resistance and better heat dissipation performance, which can improve the conductive performance and heat management capability of the connection terminal 132 under large current working conditions.

[0090] It can be understood that under normal working conditions, the current flows into / out of the power distribution device 13 through the connection terminal 132, and the on-off control and overcurrent protection are realized through internal relays 133, fuses 134 and other components. The concrete shell serves as a rigid support and insulation barrier to maintain the spatial position and electrical isolation of each electrical component, ensuring stable operation. Under abnormal working conditions (such as overcurrent, short circuit), when the current exceeds the rated value of the fuse 134, the fuse melts or even bursts, in the traditional plastic shell, high-temperature metal particles or arcs can penetrate or burn through the shell, causing short circuit of the battery cell 12. The concrete shell of the present application can effectively constrain the fragments and high-temperature substances generated by the explosion of the fuse 134, maintain the structural integrity, and prevent the spread of arcs.

[0091] Therefore, the battery device provided by the embodiments of the present application can improve the fire resistance, structural integrity and insulation reliability under electrical failure by using a concrete structure as the shell 131 of the power distribution device 13.

[0092] In some embodiments, referring to Figures 3 to 5 As shown, the power distribution device 13 further comprises components arranged in the housing 131; the connection terminal 132 comprises a main body portion 1321 arranged in the housing 131 and a protruding portion 1322 protruding out of the housing 131, the main body portion 1321 is respectively electrically connected with the components and the protruding portion 1322, and the protruding portion 1322 is electrically connected with the battery monomer 12.

[0093] The components arranged in the housing 131 can include a relay 133, a fuse 134 and the like, which can be respectively electrically connected with the battery monomer 12 through the corresponding connection terminal 132, so as to realize the power distribution and protection control of the battery monomer 12.

[0094] The connection terminal 132 can be composed of two parts, wherein the main body portion 1321 can be embedded and fixed in the concrete housing, and reliably electrically connected with the internal components (such as the fuse 134), and the protruding portion 1322 protrudes from the concrete housing and serves as an external interface for external electrical connection with the battery monomer 12 in the box 11. This design realizes a complete power distribution path, for example, current flows from the battery monomer 12 to the fuse 134 in the housing 131 through the protruding portion 1322 of the connection terminal 132, and is conducted to the main body portion 1321 inside the housing 131, so as to realize the power distribution protection function.

[0095] It can be understood that, since the concrete can integrally encapsulate the components and the main body portion 1321 of the connection terminal 132 during pouring, a rigid integrated structure is formed, which not only ensures the accurate positioning and long-term stability of the components, but also effectively prevents the connection from loosening due to vibration, impact or thermal expansion. More importantly, in a fault state (such as the fuse 134 bursting), the concrete housing can confine the high-energy fragments and high-temperature plasma inside, and the main body portion 1321 of the connection terminal 132 is firmly wrapped by the concrete and will not be forced off or displaced, thereby maintaining the controllability of the electrical connection path and avoiding the spread of short circuit.

[0096] In some embodiments, the main body portion 1321 and the protruding portion 1322 of the connection terminal 132 can be made of conductive metal materials such as aluminum and copper.

[0097] In some embodiments, the main body portion 1321 and the protruding portion 1322 of the connection terminal 132 can be rectangular, circular or the like.

[0098] In some embodiments, the connection terminal 132 can be an integrally formed structure, such as being formed by an integrally forming process such as additive manufacturing, stamping, die casting and the like. That is, the main body portion 1321 and the protruding portion 1322 are integrally formed and connected. Alternatively, as shown in Figure 5As shown, the connection terminal 132 can be a one-piece stamping copper bar.

[0099] In some embodiments, the power distribution device 13 further comprises an insulation structure provided between the components and the shell 131; and / or, an insulation structure provided between the main body portion 1321 and the shell 131; and / or, an insulation structure provided between the main body portion 1321 and the connection of the components and the shell 131.

[0100] To improve the electrical isolation performance inside the power distribution device 13, an insulation structure can be provided between the concrete shell and the internal components, the main body portion 1321 of the connection terminal, and their connection nodes. The insulation structure is used to block the electrical contact between the electrical components and the concrete shell, reducing the risk of electrical conduction of the concrete in a humid or high-voltage environment. The insulation structure can include but is not limited to an insulation layer and an insulation cover, which can be flexibly selected or combined according to the shape of the electrical components, voltage level, process conditions, etc.

[0101] The insulation layer refers to a continuous, thin, electrically insulating covering formed on the surface of the electrical component by coating, cladding, deposition, or molding, etc. It is usually closely attached to the surface of the protected object to achieve electrical isolation. The insulation layer is relatively thin, which is beneficial to save space. In some embodiments, the insulation layer can include silicone coating, epoxy coating, polyimide film, etc.

[0102] The insulation cover refers to a three-dimensional shell-shaped or box-shaped insulation member independently formed, which is used to cover the electrical components as a whole, form an isolation cavity, and can have a certain structural rigidity. In some embodiments, the insulation cover can include a ceramic insulation cover, a PBT (polybutylene terephthalate) or PPS (polyphenylene sulfide) engineering plastic cover, a silica gel insulation cap, etc.

[0103] In actual application, the insulation layer and the insulation cover can be used alone or in combination. For example, first coat an epoxy insulation layer on the surface of the fuse 134, then put it into a PBT insulation cover as a whole, and finally integrate it with the concrete shell to form a multi-level insulation composite structure of “component-insulation layer-insulation cover-concrete”, which effectively improves the reliability of high-voltage and high-energy-density battery devices.

[0104] Therefore, by providing an insulation structure between the electrical components and the concrete shell, the embodiments of the present application effectively compensate for the limitations of the insulation performance of the concrete material in a high-voltage or humid environment, improve the electrical isolation performance between the components and the concrete shell, and thus improve the reliability of the battery device.

[0105] In some embodiments, an insulation structure is provided between the components and the shell 131, which covers the surface of the components.

[0106] To achieve more reliable, uniform and full coverage of electrical isolation, the insulation structure is configured to completely cover the outer surface of the components (such as relays 133, fuses 134, etc.), forming a continuous and complete electrical insulation barrier.

[0107] As an example, a layer of high-temperature resistant epoxy resin, silicone or polyimide coating can be formed on the surface of the components by spraying, dipping or brushing.

[0108] As an example, the components can be fully wrapped with heat shrinkable sleeves, silicone sleeves or ceramic fiber cloth.

[0109] Therefore, the embodiments of the present application isolate the direct contact between the components and the concrete by the cladding insulation structure, improving the insulation reliability of the power distribution device.

[0110] In some embodiments, an insulation structure is provided between the main body part 1321 and the shell 131, which covers the surface of the main body part 1321.

[0111] The main body part 1321 of the connection terminal 132 is a conductive part embedded inside the concrete shell for electrically connecting components (such as relays 133, fuses 134, etc.), which can be made of copper, aluminum or their alloys, and has good electrical conductivity. If its surface is directly in contact with concrete, there is a risk of ion conduction in high-voltage or humid environments. Therefore, a continuous and complete insulation structure can be provided on the entire outer surface of the main body part 1321 of the connection terminal 132.

[0112] As an example, a layer of high-temperature resistant epoxy resin, silicone or polyimide coating can be formed on the outer surface of the main body part 1321 of the connection terminal 132 by spraying, dipping or brushing.

[0113] As an example, the main body part 1321 of the connection terminal 132 can be fully wrapped with heat shrinkable sleeves, silicone sleeves or ceramic fiber cloth.

[0114] Therefore, the embodiments of the present application isolate the direct contact between the main body part 1321 of the connection terminal and the concrete by the cladding insulation structure, improving the insulation reliability of the power distribution device.

[0115] In some embodiments, an insulation structure is provided between the main body part 1321 and the connection of the components, and between the shell 131, which covers the connection of the main body part 1321 and the components.

[0116] The connection between the main body part 1321 of the connection terminal 132 and the components, such as the relay contact terminal, fuse pin, etc., is directly in contact with the concrete. In a high-voltage or humid environment, there is a risk of ion conduction. Therefore, a covered insulation structure can be provided at the connection between the main body part 1321 of the connection terminal 132 and the components, forming an insulation barrier for the electrical node.

[0117] As an example, a high-insulation, high-temperature-resistant epoxy resin or silicone glue can be used for point gluing and pouring of the connection point, and a dense covering body is formed after curing, and then the concrete shell is poured as a whole.

[0118] As an example, after the main body part 1321 of the connection terminal 132 is connected to the components, the silicone or thermoplastic insulation cover is sleeved at the connection, and then the concrete shell is poured as a whole.

[0119] Therefore, the embodiment of the present application isolates the direct contact between the electrical component connection point and the concrete through the covered insulation structure, and improves the insulation reliability of the power distribution device.

[0120] In some embodiments, referring to Figures 3 to 5 As shown in the figure, the shell 131 and the components are integrally formed; and / or, the shell 131 and the main body part 1321 are integrally formed.

[0121] For example, the components (such as the relay 133, the fuse 134, etc.) and the main body part 1321 of the connection terminal 132 can be fixed in the concrete pouring mold, and the protruding part 1322 of the connection terminal 132 can be shielded by a shielding cover, etc. During pouring, the liquid concrete wraps the pre-positioned components and the main body part 1321 of the connection terminal 132, and after curing, a rigid concrete structure is formed, and then the shielding cover is removed to facilitate the electrical connection between the protruding part 1322 of the connection terminal 132 and the battery cell 12. The components and the terminal of the present application are firmly anchored by the concrete from all directions, which can effectively resist displacement or loosening caused by vibration, impact or thermal cycling, and avoid poor contact or structural failure caused by screw loosening, buckle failure, etc. in traditional assembly.

[0122] Moreover, the concrete can seep into the small gap during the flow filling process, and form a dense sealing layer after curing, achieving omnidirectional sealing of the internal electrical components and the connection node. This integrally formed structure has the ability to prevent dust, water, and foreign matter from entering, and does not require additional sealing rings or pouring glue, significantly improving the reliability of the power distribution device 13 in humid, dusty, and other harsh environments.

[0123] In addition, a one-time pouring forming process is adopted, the components and the connection terminal are pre-positioned and directly poured into the concrete, and the finished product is obtained after curing, effectively reducing the assembly steps and simplifying the manufacturing process.

[0124] In some embodiments, referring to Figure 5 As shown, the battery device further comprises a first connecting member 137; the protruding portion 1322 is provided with a first connecting hole 13221, which is used for electrical connection with the battery monomer 12 through the first connecting member 137.

[0125] The protruding portion 1322 of the connecting terminal 132 serves as an electrical interface between the power distribution device 13 and the battery monomer 12, and is provided with one or more first connecting holes 13221 for passing the first connecting member 137 (such as a bolt, a screw, a rivet, etc.) to mechanically press and electrically conduct the protruding portion 1322 and the pole or busbar structure of the battery monomer 12, thereby realizing the detachable connection between the power distribution device 13 and the battery monomer 12 and facilitating subsequent maintenance. Moreover, the design externally places the electrical connection point (the protruding portion 1322) outside the concrete shell, avoids introducing an additional conductive path in the shell 131, and facilitates assembly. In addition, it can also have a certain heat dissipation effect.

[0126] In some embodiments, referring to Figures 3 to 5 As shown, the battery device further comprises a second connecting member; the box body 11 comprises a mounting plate, and the edge of the shell 131 is provided with a second connecting hole 1311 for connecting the mounting plate through the second connecting member.

[0127] As shown in Figure 3 The number of second connecting holes 1311 can be set to multiple, and multiple second connecting holes 1311 are arranged at different positions of the bottom edge of the shell 131. Correspondingly, multiple-point fixation can be achieved through multiple second connecting members, thereby improving the connection stability and reliability of the power distribution device 13.

[0128] Optionally, the second connecting hole 1311 can be directly formed on the bottom edge of the shell 131, or a connecting boss can be arranged at the bottom edge of the shell 131, and the second connecting hole 1311 is formed on the connecting boss. Since the electrical components in the concrete shell are usually located at the middle position of the shell, and the second connecting hole 1311 is formed at the edge position of the shell, it can be as far as possible from the internal electrical components, which meets the installation requirements and does not weaken the insulation performance and structural strength of the shell at the electrical components.

[0129] As an example, the mounting plate of the housing 11 may include a base plate. A third connecting hole corresponding to the second connecting hole 1311 can be provided on the base plate of the housing 11. During the assembly of the battery device, the prefabricated concrete power distribution device can be aligned with the third connecting hole on the base plate through the bottom second connecting hole 1311, and then secured with second connecting parts (such as bolts, screws, etc.), thereby achieving detachable fixing of the power distribution device 13 and ensuring structural stability during operation. Furthermore, when the power distribution device 13 is damaged due to a fault or reaches the end of its service life, the entire power distribution device can be removed and replaced by loosening the second connecting parts, without needing to replace the entire battery device, thus reducing replacement costs.

[0130] As an example, the mounting plate of the housing 11 may include a top cover. The top cover of the housing 11 may be provided with a fourth connecting hole corresponding to the second connecting hole 1311. During the assembly of the battery device, the precast concrete power distribution device can be aligned with the fourth connecting hole on the top cover through the second connecting hole 1311, and then fastened with the second connecting parts (such as bolts, screws, etc.), thereby realizing the detachable fixing of the power distribution device 13 and ensuring the structural stability during its operation.

[0131] In other examples, the concrete power distribution unit can be connected to the bottom plate and top cover of the enclosure 11 through the corresponding connection holes and connectors described above.

[0132] In some embodiments, refer to Figure 3 and Figure 6 As shown, a first reinforcing member 135 is provided inside the wall of the second connecting hole 1311, and the second connecting member passes through the first reinforcing member 135.

[0133] Because stress concentration is easily generated around the connecting hole under the pre-tightening force of the connector or external vibration load, it can lead to cracking of the hole wall or even overall crushing, thus affecting the reliability of the connection. To address this, this application provides a first reinforcing member 135 inside the wall of the second connecting hole 1311 of the housing 131, which can improve the structural strength of the connection and effectively solve the problems of crushing and cracking that easily occur in concrete materials during the fastening of connectors.

[0134] In some embodiments, the first reinforcing member 135 may be a metal bushing, a threaded sleeve, or the like.

[0135] In some embodiments, the first reinforcement 135 may be pre-embedded during concrete pouring or pressed / bonded after curing.

[0136] In some embodiments, the first reinforcing member 135 and the hole wall of the second connecting hole 1311 are integrally formed.

[0137] The first reinforcing member 135 is integrally formed with the hole wall of the second connecting hole 1311 through a concrete pouring process. This structure enables the reinforcing member to be firmly combined with the concrete during the curing process of the shell 131, effectively avoiding the problem of shell 131 crushing or reinforcing member loosening caused by fastening of the connecting member during late assembly, thereby improving the connection stability and reliability.

[0138] In some embodiments, referring to Figure 7 As shown, a second reinforcing member 136 is arranged in the concrete structure, and the second reinforcing member 136 is used to improve the structural stability of the concrete structure.

[0139] By arranging the second reinforcing member 136 in the concrete structure, the inherent defects of the concrete material, such as brittleness and low tensile strength, are effectively overcome, and the overall structural strength, impact resistance, and cracking resistance of the power distribution device shell 131 are improved. The second reinforcing member 136 can be made of steel bars, fibers (such as steel fibers, basalt fibers, carbon fibers, etc.), or metal frameworks (such as steel wire meshes), and is integrally poured and formed with the concrete, thereby enhancing the structural stability of the power distribution device 13 under complex working conditions such as vibration and thermal cycling, and improving the reliability of the battery device.

[0140] In one specific example, referring to Figures 3 to 7 As shown, the present application provides a concrete power distribution device, which mainly includes a concrete shell, components, connecting terminals, an insulation structure, a metal bushing, and a metal framework, etc.

[0141] During manufacturing, the components (such as relays 133, fuses 134, etc.) and the main body part 1321 of the corresponding connecting terminals 132 are first electrically connected and assembled, then the protruding part 1322 of the connecting terminal 132 is shielded by a shielding cover or the like, and then the remaining parts of the assembled overall electrical components except for the protruding part 1322 are sprayed with an insulation layer or isolated using an insulation cover. The overall electrical components after isolation, the metal bushing, and the metal framework are fixed through a concrete pouring mold, and then integrally poured and formed with the concrete. After the concrete solidifies, a concrete shell connected to the electrical components is formed, thereby obtaining a concrete power distribution device. Then, the shielding cover is removed to expose the protruding part 1322 of the connecting terminal 132, so as to facilitate electrical connection with the battery monomer 12.

[0142] In some embodiments, the present application also provides a power utilization device, which includes the battery device 100 of the above-mentioned embodiments, and the battery device 100 is used to provide electrical energy.

[0143] The power utilization device can be a device or system of any of the above-mentioned application battery devices 100.

[0144] The above merely preferred embodiments of the present application are not used to limit the embodiments of the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body; a battery cell arranged in the box body; a power distribution device arranged in the box body, the power distribution device comprising a housing and a connecting terminal, the housing being a concrete structure, and the connecting terminal being arranged in the housing and used for electrically connecting the battery cell.

2. The battery device according to claim 1, characterized by The power distribution device further comprises components arranged in the housing; the connecting terminal comprises a main body portion arranged in the housing and a protruding portion protruding out of the housing, the main body portion being electrically connected with the components and the protruding portion respectively, and the protruding portion being electrically connected with the battery cell.

3. The battery device of claim 2, wherein, The power distribution device further comprises an insulation structure, the insulation structure being arranged between the components and the housing; and / or, the insulation structure being arranged between the main body portion and the housing; and / or, the insulation structure being arranged between the main body portion and the housing; and / or, 4. The battery device of claim 3, wherein the insulation structure being arranged between the main body portion and the housing.

5. The battery device of claim 3, wherein The insulation structure is arranged between the components and the housing, and covers surfaces of the components.

6. The battery device of claim 3, wherein The insulation structure is arranged between the main body portion and the housing, and covers surfaces of the main body portion.

7. The battery device of claim 3, wherein The insulation structure is arranged between the main body portion and the housing, and covers surfaces of the main body portion.

8. The battery device of claim 2, wherein The insulation structure comprises an insulation layer and / or an insulation cover.

9. The battery device of claim 2, wherein, The housing and the components are integrally formed; and / or, the housing and the main body portion are integrally formed.

10. The battery device according to any one of claims 1 to 9, characterized by, The battery device further comprises a first connecting member; the protruding portion is provided with a first connecting hole used for electrically connecting the battery cell through the first connecting member.

11. The battery device of claim 10, wherein, The battery device further comprises a second connecting member; the box body comprises a mounting plate, and a rim of the housing is provided with a second connecting hole used for connecting the mounting plate through the second connecting member.

12. The battery device of claim 11, wherein, A first reinforcing member is arranged in a hole wall of the second connecting hole, and the second connecting member is arranged in the first reinforcing member.

13. The battery device according to any one of claims 1 to 9, characterized by, The first reinforcing member and the hole wall of the second connecting hole are integrally formed.

14. An electrical device, comprising: A second reinforcing member is arranged in the concrete structure. The battery device of any one of claims 1 to 13 is used for providing electric energy.

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