Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery monomer, a box body and an output electrode base, the box body comprises an accommodating space and a beam body arranged along the periphery of the accommodating space, and the battery monomer is accommodated in the accommodating space. The output pole base comprises a base body and a heat dissipation piece, the base body is connected to the beam body, and the heat dissipation piece is connected with and protrudes out of the surface of the base body. According to the battery device, the heat dissipation performance of the battery device can be effectively 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 development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] A lot of heat is generated during the operation of the battery device, and the heat dissipation performance of the battery device will directly affect the reliability, cost of use and user experience of the terminal product. Therefore, how to effectively improve the heat dissipation performance of the battery device is a technical issue that needs to be continuously improved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can effectively improve the heat dissipation performance of the battery device.

[0005] In a first aspect, an embodiment of the present application provides a battery device, the battery device includes a battery cell, a box body and an output pole base, the box body includes a storage space and a beam body arranged along the periphery of the storage space, the battery cell is stored in the storage space. The output pole base includes a base body and a heat sink, the base body is connected to the beam body, and the heat sink is connected to and protrudes from the surface of the base body.

[0006] The above technical solution can increase the total area of ​​the heat dissipation surface of the output pole base by introducing the heat dissipation element, so as to increase the heat transfer area of ​​the output pole base as a whole, so that more heat can be dissipated through the contact between the output pole base and the surrounding air, thereby effectively improving the heat dissipation performance of the battery device. In addition, the heat dissipation element protrudes from the surface of the base body, which can also play a role in strengthening the structural strength of the output pole base.

[0007] In some embodiments of the first aspect, the battery device further includes a first connector, the first connector including a first end and a second end connected to each other, the first end is connected to the base body, and the second end is connected to the battery cell.

[0008] The above technical solution can improve the convenience of connection between the battery cell and the external device by introducing the first connecting member, thereby reducing the difficulty of assembling the battery device and helping to improve the assembly efficiency of the battery device.

[0009] In some embodiments of the first aspect, the base body includes a main body portion and a fixing portion connected to each other, the beam body includes a first surface and a second surface, the first surface and the second surface are connected, and the first surface is a side surface of the beam body facing away from the battery cell. The fixing portion is connected to the first surface, the main body portion is arranged on the second surface, the heat sink is connected to and protrudes from a side of the fixing portion facing away from the beam body, and the first end portion is connected to the main body portion.

[0010] The above technical solution can not only improve the structural compactness of the battery device, but also improve the overall assembly efficiency of the battery device.

[0011] In some embodiments of the first aspect, the output pole base further includes a heat conductive member, and the heat conductive member is clamped between the main body and the first end portion.

[0012] The above technical solution arranges a heat conductive member to be clamped between the main body and the first end portion, so that the heat generated by the first end portion of the first connecting member can be quickly transferred to the output pole base through the heat conductive member, and the heat is then dissipated through the contact between the output pole base and the surrounding air, thereby effectively improving the heat dissipation performance of the battery device.

[0013] In some embodiments of the first aspect, a first connection structure is disposed on the main body, the first end portion is connected to the first connection structure, and the heat conducting member is disposed along the periphery of the first connection structure.

[0014] The above technical solution can further improve the heat conduction efficiency between the main body and the first end portion by arranging the heat conducting member along the outer periphery of the first connecting structure.

[0015] In some embodiments of the first aspect, the main body includes a base, a first enclosure disposed on the base, and two second enclosures disposed on the base and opposite to each other, the first enclosure connected between the two second enclosures; the base, the first enclosure, and the second enclosure together form a receiving cavity. The heat conducting member and the first end are located in the receiving cavity, and the heat conducting member is clamped between the base and the first end.

[0016] The heat conducting member and the first end of the above technical solution are located in the accommodating cavity, which can reduce the occupation of the internal space of the battery device by the heat conducting member and the first end, thereby helping to improve the energy density of the battery device.

[0017] In some embodiments of the first aspect, the first connecting member further includes an abutment portion, the abutment portion is connected between the first end portion and the second end portion, at least a portion of the abutment portion is located in the accommodating cavity, and the abutment portion abuts against the first enclosure portion.

[0018] The above technical solution introduces the abutment portion, which can limit the movement of the first connecting member, which not only facilitates the assembly between the first connecting member and the output pole base, but also improves the stability of the first connecting member.

[0019] In some embodiments of the first aspect, the heat conducting member and the base body are an integrally formed structure.

[0020] On the one hand, there is no need to connect the heat conducting member to the base body through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the heat conducting member to the base body through an additional connection process, the heat conducting member with an integrated structure has a higher connection firmness with the base body.

[0021] In some embodiments of the first aspect, a hardness of the thermal conductor is less than a hardness of the base body.

[0022] The heat conductive part of the above technical solution has a softer texture, which can not only reduce the risk of scratching the first end, but also enable the heat conductive part to deform itself under the clamping of the first end and the base body to further increase the contact area between itself, the first end and the base body, thereby further improving the heat conduction efficiency between the base body and the first end.

[0023] In some embodiments of the first aspect, the fixing portion extends along a direction parallel to the first surface.

[0024] The above technical solution can increase the extension area of ​​the fixing part to increase the contact area between the fixing part and the beam body, which can not only improve the connection firmness between the output pole base and the beam body, but also increase the heat conduction area between the fixing part and the beam body. It can also provide a larger layout space for the heat sink to increase the total area of ​​the heat dissipation surface of the output pole base, thereby further improving the heat dissipation performance of the battery device.

[0025] In some embodiments of the first aspect, a second connection structure is provided on the fixing portion, and at least a portion of the heat sink is disposed along an outer periphery of the second connection structure.

[0026] The above technical solution can effectively improve the structural strength of the second connection structure of the fixing part by arranging the heat conducting member along the outer periphery of the first connection structure, thereby effectively improving the overall reliability of the output pole base.

[0027] In some embodiments of the first aspect, the battery device further includes a second connecting member connected to a side of the first connecting member facing away from the base body.

[0028] The above technical solution can further improve the convenience of connection between the battery cell and the external device by introducing the second connecting member, thereby reducing the difficulty of assembling the battery device and helping to improve the assembly efficiency of the battery device.

[0029] In some embodiments of the first aspect, the first connecting member and the output pole base are insert injection molding structures.

[0030] On the one hand, there is no need to connect the first connector to the output pole base through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the first connector to the output pole base through an additional connection process, the first connector and the output pole base in an integrated structure have a higher connection firmness. In addition, the above technical solution can further increase the contact area between the first connector and the output pole base, thereby further improving the overall heat dissipation performance of the battery device.

[0031] In some embodiments of the first aspect, there are multiple heat sinks, and the multiple heat sinks are arranged at intervals.

[0032] The above technical solution can further increase the total area of ​​the heat dissipation surface of the output pole base, thereby further improving the heat dissipation performance of the battery device.

[0033] In some embodiments of the first aspect, the material of the output pole base includes thermally conductive plastic.

[0034] The above technical solution can further improve the heat dissipation efficiency of the output pole base by using thermally conductive plastic to prepare the output pole base.

[0035] In a second aspect, the present application provides an electrical device, comprising a battery device provided by any embodiment of the first aspect, and the battery device is used to store or provide electrical energy.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0039] Figure 2 A schematic diagram of the structure of a battery module of a battery device provided in some embodiments of the present application;

[0040] Figure 3 A schematic structural diagram of a box of a battery device provided in some embodiments of the present application;

[0041] Figure 4A schematic diagram of a partial explosion structure of a battery device provided in some embodiments of the present application;

[0042] Figure 5 A schematic diagram of a partial structure of a battery device provided in some embodiments of the present application;

[0043] Figure 6 A schematic diagram of an exploded structure of an output pole base and a first connecting member of a battery device provided in some embodiments of the present application.

[0044] The reference numerals in the specific implementation manner are as follows:

[0045] 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor;

[0046] 100. battery module; 10. battery cell;

[0047] 20. box body; 21. accommodating space; 22. beam body; 221. first surface; 222. second surface;

[0048] 30. output pole base; 31. base body; 311. main body; 3111. base; 3112. first enclosure; 3113. second enclosure; 312. fixing part; 32. heat sink; 33. heat conducting part;

[0049] 40. first connecting member; 41. first end portion; 42. second end portion; 43. abutting portion;

[0050] 50, first connection structure; 60, second connection structure; 70, second connection member; X, length direction. DETAILED DESCRIPTION

[0051] 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 and completely 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.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those 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" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0053] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0054] 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.

[0055] 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.

[0056] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0057] The term “plurality” used in this application refers to two or more (including two).

[0058] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0059] In the present application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell or a magnesium-ion battery cell, etc., and the embodiments of the present application do not limit this. The battery cell may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this.

[0060] The battery device mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in mixed connection through a busbar component.

[0061] In some embodiments, the battery device may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0062] In some embodiments, the battery device may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are accommodated in the case.

[0063] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0064] In some embodiments, the battery device may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0065] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0066] A lot of heat is generated during the operation of the battery device, and the heat dissipation performance of the battery device will directly affect the reliability, usage cost and user experience of the terminal product.

[0067] At present, the battery cells in the battery device are connected to the output pole base through a connector to realize charging and discharging operations. For example, the relevant electrical connection device is a battery disconnect unit (BDU). Since the overcurrent at the connection point between the output pole of the battery module and the relevant electrical connection device is large, the temperature rise here is high.

[0068] In addition, the current output pole base is usually made of conventional glass fiber reinforced plastic, which has a low thermal conductivity. At the same time, due to the structure of the output pole base itself, the heat dissipation performance of the output pole base is poor and cannot meet the heat dissipation requirements of the battery device.

[0069] Based on the above considerations, an embodiment of the present application provides a battery device, which includes a battery cell, a box body and an output pole base, wherein the box body includes a receiving space and a beam body arranged along the periphery of the receiving space, and the battery cell is received in the receiving space. The output pole base includes a base body and a heat sink, wherein the base body is connected to the beam body, and the heat sink is connected to and protrudes from the surface of the base body.

[0070] The above technical solution can increase the total area of ​​the heat dissipation surface of the output pole base by introducing the heat dissipation element, so as to increase the heat transfer area of ​​the output pole base as a whole, so that more heat can be dissipated through the contact between the output pole base and the surrounding air, thereby effectively improving the heat dissipation performance of the battery device. In addition, the heat dissipation element protrudes from the surface of the base body, which can also play a role in strengthening the structural strength of the output pole base.

[0071] The technical solutions described in the embodiments of the present application are applicable to battery devices and electrical devices using the battery devices.

[0072] Electrical devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0073] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including battery boxes and electrical devices using battery devices. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0074] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0075] Continue to refer Figure 1 The vehicle 1 is provided with a battery device 2 inside, and the battery device 2 can be provided at the bottom, head, or tail of the vehicle 1. The battery device 2 can be used for powering the vehicle 1, for example, the battery device 2 can be used as an operating power source for the vehicle 1.

[0076] The vehicle 1 may further include a controller 3 and a motor 4 , wherein the controller 3 is used to control the battery device 2 to supply power to the motor 4 , for example, to meet the power requirements of starting, navigating and driving the vehicle 1 .

[0077] In some embodiments of the present application, the battery device 2 can not only serve as an operating power source for the vehicle 1, but also serve as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0078] Figure 2 A schematic diagram of the structure of a battery module of a battery device provided in some embodiments of the present application, Figure 3 This is a schematic diagram of the structure of a box of a battery device provided in some embodiments of the present application. Figure 4 A schematic diagram of a partial explosion structure of a battery device provided in some embodiments of the present application, Figure 5 A partial structural diagram of a battery device provided in some embodiments of the present application is shown in FIG. Figure 6 A schematic diagram of an exploded structure of an output pole base and a first connecting member of a battery device provided in some embodiments of the present application.

[0079] refer to Figures 2 to 6 The embodiment of the present application provides a battery device, which includes a battery cell 10, a box body 20 and an output pole base 30. The box body 20 includes a receiving space 21 and a beam body 22 arranged along the periphery of the receiving space 21. The battery cell 10 is received in the receiving space 21. The output pole base 30 includes a base body 31 and a heat sink 32. The base body 31 is connected to the beam body 22. The heat sink 32 is connected to and protrudes from the surface of the base body 31.

[0080] In the battery device, the box 20 is used to accommodate the battery cell 10. The box 20 can be a variety of structures, such as a cylinder, a cuboid, etc. The battery cell 10 can be one or more. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 10 are both connected in series and in parallel. Multiple battery cells 10 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 10 is accommodated in the box 20; of course, multiple battery cells 10 can also be connected in series, in parallel, or in mixed connection to form a battery module 100, and then the multiple battery modules 100 are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the box 20.

[0081] In some examples, there are multiple battery cells 10, and the multiple battery cells 10 are first connected in series, in parallel, or in mixed series to form a battery module 100. The multiple battery modules 100 are then connected in series, in parallel, or in mixed series to form a whole, and are accommodated in the box 20.

[0082] The multiple battery cells 10 in the battery module 100 may be electrically connected via a busbar component to achieve parallel connection, series connection, or mixed connection of the multiple battery cells 10 in the battery module 100 .

[0083] Exemplarily, the beam body 22 may be a rectangular parallelepiped beam body 22, or a cylindrical beam body 22, or other irregular beam bodies 22, etc. Correspondingly, the shape of the accommodating space 21 matches the shape of the beam body 22. If the beam body 22 is a rectangular parallelepiped beam body 22, then the accommodating space 21 is a rectangular parallelepiped; if the beam body 22 is a cylindrical beam body 22, then the accommodating space 21 is a cylindrical body.

[0084] Optionally, the beam body 22 may be but is not limited to being made of metal or non-metal materials. For example, the metal material may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metal material may be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0085] Optionally, the beam body 22 may be a variety of beam structures such as a rolled beam and a profiled beam.

[0086] The battery cell 10 in the battery device is connected to the output pole base 30 through a connector and a related electrical connection device to achieve charging and discharging operations. For example, the related electrical connection device can be a battery disconnect unit (BDU). The base body 31 is the main bearing component for connecting the connector and the related electrical connection device. The heat sink 32 can be understood as a heat sink fin, which is used to increase the total area of ​​the heat dissipation surface of the output pole base 30 to increase the overall heat transfer area of ​​the output pole base 30.

[0087] The base body 31 can be detachably connected to the beam body 22, or can be integrally provided on the beam body 22. The base body 31 can be directly connected to the beam body 22, or can be restricted on the beam body 22 by other components. As an example, the connection method between the base body 31 and the beam body 22 can be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0088] Optionally, the base body 31 can be but is not limited to being made of metal or non-metallic materials. For example, the metal material can be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, etc., and the non-metallic material can be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0089] Optionally, the base body 31 may be, but is not limited to, a block structure, a sheet structure, or a bracket structure.

[0090] The heat sink 32 may be detachably connected to the base body 31, or may be integrally provided on the base body 31. The heat sink 32 may be directly connected to the base body 31, or may be restricted to the base body 31 by other components. As an example, the heat sink 32 and the base body 31 may be connected by, but not limited to, bolt connection, riveting, clamping or bonding.

[0091] Optionally, the heat sink 32 may be but is not limited to being made of metal or non-metal materials. For example, the metal material may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy or stainless steel, and the non-metal material may be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide or polyamide, etc.

[0092] As an example, the base body 31 and the heat sink 32 may be made of the same material, which can simplify the preparation process of the output pole base 30 and reduce the cost.

[0093] In some examples, the base body 31 and the heat sink 32 are integrally formed. On the one hand, there is no need to connect the base body 31 and the heat sink 32 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the base body 31 and the heat sink 32 through an additional connection process, the base body 31 and the heat sink 32 in an integral structure have a higher connection firmness.

[0094] The above technical solution can increase the total area of ​​the heat dissipation surface of the output pole base 30 by introducing the heat dissipation member 32, so as to increase the overall heat transfer area of ​​the output pole base 30, so that more heat can be dissipated through the contact between the output pole base 30 and the surrounding air, thereby effectively improving the heat dissipation performance of the battery device. In addition, the heat dissipation member 32 protrudes from the surface of the base body 31, and can also play a role in strengthening the structural strength of the output pole base 30.

[0095] In some embodiments, the battery device further includes a first connector 40 , the first connector 40 includes a first end 41 and a second end 42 connected to each other, the first end 41 is connected to the base body 31 , and the second end 42 is connected to the battery cell 10 .

[0096] For example, the first connector 40 can be used as an output pole of the battery cell 10 or the battery module 100 to output electric energy to an external device, and the first connector 40 can be a copper sheet, an aluminum sheet, a copper-aluminum composite material, or other material with good electrical conductivity. As an example, the first connector 40 is an aluminum busbar.

[0097] The first end portion 41 may be directly connected to the base body 31, or may be restricted on the beam body 22 by other components. As an example, the connection between the first end portion 41 and the base body 31 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0098] The second end 42 may be directly connected to the battery cell 10, or may be restricted to the battery cell 10 by other components. As an example, the second end 42 may be connected to the battery cell 10 by, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0099] The above technical solution can improve the convenience of connection between the battery cell 10 and the external device by introducing the first connector 40, thereby reducing the difficulty of assembling the battery device and improving the assembly efficiency of the battery device.

[0100] In some embodiments, the base body 31 includes a main body portion 311 and a fixing portion 312 connected to each other, and the beam body 22 includes a first surface 221 and a second surface 222, the first surface 221 and the second surface 222 are connected to each other, and the first surface 221 is a side surface of the beam body 22 facing away from the battery cell 10. The fixing portion 312 is connected to the first surface 221, the main body portion 311 is disposed on the second surface 222, the heat sink 32 is connected to and protrudes from a side of the fixing portion 312 facing away from the beam body 22, and the first end portion 41 is connected to the main body portion 311.

[0101] Exemplarily, the main body 311 is the main bearing component for connecting the connector with the relevant electrical connection device, and the fixing portion 312 is the main part fixedly connected to the beam body 22. The fixing portion 312 can be detachably connected to the main body 311, or can be integrally provided on the main body 311. The fixing portion 312 can be directly connected to the main body 311, or can be restricted to the main body 311 by other components. As an example, the connection method between the fixing portion 312 and the main body 311 can be, but is not limited to, bolt connection, riveting, clamping or bonding.

[0102] The beam body 22 may be in a rectangular parallelepiped shape, that is, the cross section of the beam body 22 perpendicular to its length direction X is a rectangle. The beam body 22 may also be in other shapes, for example, the cross section of the beam body 22 perpendicular to its length direction X is a square, triangle, trapezoid or polygon.

[0103] In order to clearly illustrate the embodiments of the present application, the following description is made by taking the beam body 22 as a rectangular parallelepiped as an example.

[0104] The beam body 22 includes two surfaces facing each other in a first direction and two surfaces facing each other in a second direction, and the first direction, the second direction and the length direction X of the beam body 22 are perpendicular to each other. The first surface 221 is a side surface of the beam body 22 facing away from the battery cell 10, and the second surface 222 is one of the two surfaces of the beam body 22 facing each other in the second direction.

[0105] The fixing portion 312 is connected to the first surface 221 , and the main body 311 is arranged on the second surface 222 , so that the output pole base 30 can be extended along the outer peripheral surface of the beam body 22 , which can improve the consistency between the output pole base 30 and the beam body 22 , and is beneficial to improving the structural compactness of the battery device.

[0106] The heat sink 32 is connected to the fixing portion 312, and the first end portion 41 is connected to the main body portion 311, which can reduce the risk of interference between the heat sink 32 and the first connecting member 40 during the assembly process of the first connecting member 40 and the output pole base 30, and can improve the overall assembly efficiency of the battery device.

[0107] Optionally, the main body 311 may be, but not limited to, a block structure, a sheet structure, or a bracket structure, etc. The fixing portion 312 may be, but not limited to, a block structure, a sheet structure, or a bracket structure, etc.

[0108] In this way, the above technical solution can not only improve the structural compactness of the battery device, but also improve the overall assembly efficiency of the battery device.

[0109] In some examples, the main body 311 is fixedly connected to the second surface 222 , which can increase the contact area between the output pole base 30 and the beam body 22 , and improve the stability of the output pole base 30 .

[0110] In some examples, the box body 20 includes a bottom plate, the beam body 22 is connected to the bottom plate, and the second surface 222 is a side surface of the beam body 22 facing away from the bottom plate.

[0111] In some embodiments, the output pole base 30 further includes a heat conducting member 33 , and the heat conducting member 33 is clamped between the main body 311 and the first end 41 .

[0112] Exemplarily, the heat conductor 33 may be fixed on the main body 311 , the heat conductor 33 may be fixed on the first end 41 , or the heat conductor 33 may be independent of the main body 311 and the first end 41 and fixed by the clamping force between the main body 311 and the first end 41 .

[0113] Optionally, the heat conducting member 33 may be made of, but is not limited to, heat conducting silica gel, heat conducting rubber or heat conducting soft plastic.

[0114] Optionally, the heat conducting member 33 may be, but is not limited to, a block-shaped structure, a sheet-shaped structure, a columnar structure, or the like.

[0115] It is understandable that when the first end portion 41 and the main body portion 311 are assembled and connected, a gap is easily generated at the connection between the first end portion 41 and the main body portion 311, and the thermal resistance is relatively large. During the operation of the battery device, the heat generated by the first end portion 41 cannot be quickly conducted.

[0116] In this way, the above technical solution sets a heat conductive member 33 clamped between the main body 311 and the first end 41, and the heat generated by the first end 41 of the first connecting member 40 can be quickly transferred to the output pole base 30 through the heat conductive member 33, and the heat is then dissipated by the contact between the output pole base 30 and the surrounding air, thereby effectively improving the heat dissipation performance of the battery device.

[0117] In some embodiments, a first connection structure 50 is disposed on the main body 311 , the first end portion 41 is connected to the first connection structure 50 , and the heat conducting member 33 is disposed along the outer periphery of the first connection structure 50 .

[0118] Exemplarily, the first connection structure 50 may be a through hole or a threaded hole, etc. The first end portion 41 is fixed to the main body portion 311 through the first connection structure 50. As an example, the first connection structure 50 is a threaded hole, and the first end portion 41 is fixed to the main body portion 311 by a bolt.

[0119] The heat conducting member 33 may be disposed around the first connection structure 50. Of course, alternatively, the heat conducting member 33 may also be disposed around the first connection structure 50 for less than one circle, for example, but not limited to 1 / 3 circle, 1 / 2 circle, 2 / 3 circle or 3 / 4 circle.

[0120] It is understandable that when the first end portion 41 is assembled and connected to the main body portion 311 , there is a high risk of a gap being generated at the connection between the first end portion 41 and the main body portion 311 in the outer peripheral area of ​​the first connection structure 50 .

[0121] In this way, the above technical solution can further improve the heat conduction efficiency between the main body 311 and the first end portion 41 by arranging the heat conducting member 33 along the outer periphery of the first connecting structure 50 .

[0122] In some embodiments, the main body 311 includes a base 3111, a first enclosure 3112 disposed on the base 3111, and two second enclosures 3113 disposed on the base 3111 and opposite to each other, and the first enclosure 3112 is connected between the two second enclosures 3113. The base 3111, the first enclosure 3112, and the second enclosure 3113 are enclosed to form a receiving cavity. The heat conducting member 33 and the first end 41 are located in the receiving cavity, and the heat conducting member 33 is clamped between the base 3111 and the first end 41.

[0123] Exemplarily, the base portion 3111, the first enclosure portion 3112 and the second enclosure portion 3113 can all be sheet structures or block structures, and the base portion 3111 and the first enclosure portion 3112 and two second enclosure portions 3113 arranged on the base portion 3111 can be enclosed to form a concave groove structure and form a accommodating cavity.

[0124] The first enclosure portion 3112 may be detachably connected to the base portion 3111, or may be integrally provided on the base portion 3111. The first enclosure portion 3112 may be directly connected to the base portion 3111, or may be restricted on the base portion 3111 by other components. As an example, the connection method between the first enclosure portion 3112 and the base portion 3111 may be, but is not limited to, bolt connection, riveting, clamping, or bonding.

[0125] The second enclosure portion 3113 may be detachably connected to the base portion 3111, or may be integrally provided on the base portion 3111. The second enclosure portion 3113 may be directly connected to the base portion 3111, or may be restricted to the base portion 3111 by other components. As an example, the connection method between the second enclosure portion 3113 and the base portion 3111 may be, but is not limited to, bolt connection, riveting, clamping, or bonding.

[0126] The first enclosure portion 3112 may be detachably connected to the second enclosure portion 3113, or may be integrally provided on the second enclosure portion 3113. The first enclosure portion 3112 may be directly connected to the second enclosure portion 3113, or may be restricted to the second enclosure portion 3113 by other components. As an example, the connection method between the first enclosure portion 3112 and the second enclosure portion 3113 may be, but is not limited to, bolt connection, riveting, clamping, or bonding.

[0127] In some examples, the base 3111, the first enclosure 3112, and the second enclosure 3113 are integrally formed. On the one hand, there is no need to connect the base 3111, the first enclosure 3112, and the second enclosure 3113 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the base 3111, the first enclosure 3112, and the second enclosure 3113 through an additional connection process, the base 3111, the first enclosure 3112, and the second enclosure 3113 in an integral structure have a higher connection firmness.

[0128] The heat conducting member 33 and the first end 41 of the above technical solution are located in the accommodating cavity, which can reduce the occupation of the internal space of the battery device by the heat conducting member 33 and the first end 41, thereby helping to improve the energy density of the battery device.

[0129] In some embodiments, the first connecting member 40 further includes an abutment portion 43 , which is connected between the first end 41 and the second end 42 , at least part of which is located in the accommodating cavity, and abuts against the first enclosure portion 3112 .

[0130] Exemplarily, the abutment portion 43 may be detachably connected between the first end portion 41 and the second end portion 42, or may be integrally provided between the first end portion 41 and the second end portion 42. The second enclosure portion 3113 may be directly connected to the first end portion 41 and the second end portion 42, or may be restricted between the first end portion 41 and the second end portion 42 by other components. As an example, the connection method between the abutment portion 43 and the first end portion 41 and the connection method between the abutment portion 43 and the second end portion 42 may be, but are not limited to, bolt connection, riveting, clamping or bonding.

[0131] In some examples, the abutment portion 43, the first end portion 41, and the second end portion 42 are integrally formed. On the one hand, there is no need to connect the abutment portion 43, the first end portion 41, and the second end portion 42 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the abutment portion 43, the first end portion 41, and the second end portion 42 through an additional connection process, the abutment portion 43, the first end portion 41, and the second end portion 42 in an integral structure have a higher connection firmness.

[0132] At least a portion of the abutting portion 43 is located in the accommodating cavity. It can be understood that the abutting portion 43 is entirely located in the accommodating cavity, or a portion of the abutting portion 43 is located in the accommodating cavity.

[0133] The above technical solution introduces the abutment portion 43 , which can limit the movement of the first connection member 40 , which not only facilitates the assembly between the first connection member 40 and the output pole base 30 , but also improves the stability of the first connection member 40 .

[0134] In some embodiments, the heat conducting member 33 and the base body 31 are integrally formed.

[0135] For example, the heat conducting member 33 and the base body 31 may be integrally formed by secondary injection molding or two-color injection molding, etc. The heat conducting member 33 and the base body 31 may be made of the same material or different materials.

[0136] On the one hand, there is no need to connect the heat conducting member 33 to the base body 31 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the heat conducting member 33 to the base body 31 through an additional connection process, the heat conducting member 33 and the base body 31 in an integrated structure have a higher connection firmness.

[0137] In some embodiments, the hardness of the heat conductive member 33 is less than the hardness of the base body 31 .

[0138] Exemplarily, the hardness of the heat conductor 33 and the base body 31 can be measured by Shore hardness, Brinell hardness or Rockwell hardness. As an example, in Shore hardness, a Shore hardness tester with a truncated conical indenter is used to press the indenter into the material surface under a specified load to read the hardness value. The higher the hardness value, the harder the material. The specific steps of Brinell hardness and Rockwell hardness can be carried out with reference to the methods in the existing technical literature, which will not be repeated here.

[0139] The heat conductive part 33 of the above technical solution has a softer texture, which can not only reduce the risk of scratching the first end part 41, but also enable the heat conductive part 33 to deform itself under the clamping of the first end part 41 and the base body 31 to further increase the contact area between itself and the first end part 41 and the base body 31, thereby further improving the heat conduction efficiency between the base body 31 and the first end part 41.

[0140] In some embodiments, the fixing portion 312 is extended along a direction parallel to the first surface 221 . In other words, the fixing portion 312 is extended along the first surface 221 .

[0141] The above technical solution can increase the extension area of ​​the fixing portion 312 to increase the contact area between the fixing portion 312 and the beam body 22, which can not only improve the connection firmness between the output pole base 30 and the beam body 22, but also increase the heat conduction area between the fixing portion 312 and the beam body 22. In addition, a larger layout space can be provided for the heat sink 32 to increase the total area of ​​the heat dissipation surface of the output pole base 30, thereby further improving the heat dissipation performance of the battery device.

[0142] In some embodiments, a second connection structure 60 is formed on the fixing portion 312 , and at least a portion of the heat sink 32 is disposed along the outer periphery of the second connection structure 60 .

[0143] Exemplarily, the second connection structure 60 may be a through hole or a threaded hole, etc. The fixing portion 312 is fixed to the beam body 22 through the second connection structure 60. As an example, the second connection structure 60 is a threaded hole, and the fixing portion 312 is fixed to the beam body 22 through bolts.

[0144] The heat sink 32 may be disposed around the second connection structure 60. Of course, alternatively, the heat sink 32 may also be disposed around the second connection structure 60 for less than one circle, for example, but not limited to 1 / 3 circle, 1 / 2 circle, 2 / 3 circle or 3 / 4 circle.

[0145] It is understandable that after the fixing portion 312 is fixed to the beam body 22 via the second connection structure 60 , the fixing portion 312 is susceptible to greater stress at the second connection structure 60 , thereby increasing the risk of the fixing portion 312 breaking at the second connection structure 60 .

[0146] Thus, the above technical solution can effectively improve the structural strength of the second connection structure 60 of the fixing portion 312 by arranging the heat conducting member 33 along the outer periphery of the first connection structure 50 , thereby effectively improving the overall reliability of the output pole base 30 .

[0147] In some embodiments, the battery device further includes a second connecting member 70 , and the second connecting member 70 is connected to a side of the first connecting member 40 facing away from the base body 31 .

[0148] Exemplarily, one end of the second connector 70 is connected to the side of the first connector 40 facing away from the base body 31, and the other end of the second connector 70 is used to connect to a related electrical connection device, for example, the related electrical connection device may be a battery disconnect unit (BDU). The second connector 70 may be, but is not limited to, a conductive structure such as a guide plate or a guide bar. The second connector 70 may be, but is not limited to, made of a material having good electrical conductivity such as copper, aluminum, or a copper-aluminum composite material. As an example, the second connector 70 is a copper busbar.

[0149] The second connecting member 70 and the first connecting member 40 may be made of the same material or different materials.

[0150] The second connecting member 70 may be directly connected to the first connecting member 40, or may be restricted on the first connecting member 40 by other components. As an example, the connection between the first end 41 and the first connecting member 40 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0151] In some examples, the second connection member 70 and the first connection member 40 are laminated and fixedly connected to the output pole base 30 by bolts.

[0152] The above technical solution can further improve the convenience of connection between the battery cell 10 and the external device by introducing the second connector 70, thereby reducing the difficulty of assembling the battery device and improving the assembly efficiency of the battery device.

[0153] In some embodiments, the first connector 40 and the output pole base 30 are insert injection molding structures.

[0154] Insert molding is to fix the metal insert in the appropriate position in the mold in advance, and then inject plastic to form it. After the mold is opened, the insert is tightly wrapped by the cooled and solidified plastic and buried in the product.

[0155] For example, in the embodiment, the first connector 40 is prepared first, and then the first connector 40 is pre-fixed at an appropriate position in the mold, and then the plastic is injected to form the output pole base 30. After the mold is opened, at least part of the first connector 40 is tightly wrapped by the cooled and solidified plastic and buried in the output pole base 30. It should be noted that a part of the first end 41 needs to be exposed outside the output pole base 30 to facilitate the connection of the first end 41 with other components.

[0156] On the one hand, there is no need to connect the first connector 40 to the output pole base 30 through an additional connection process, which simplifies the manufacturing process. At the same time, compared with connecting the first connector 40 to the output pole base 30 through an additional connection process, the first connector 40 and the output pole base 30 in an integrated structure have a higher connection firmness.

[0157] In addition, the above technical solution can further increase the contact area between the first connector 40 and the output pole base 30 , thereby further improving the heat dissipation performance of the battery device as a whole.

[0158] In some embodiments, there are multiple heat dissipation elements 32 , and the multiple heat dissipation elements 32 are arranged at intervals.

[0159] Exemplarily, the number of heat sinks 32 may be two, three, four, five or more, which may be selected according to actual application environment.

[0160] The above technical solution can further increase the total area of ​​the heat dissipation surface of the output pole base 30, thereby further improving the heat dissipation performance of the battery device.

[0161] In some examples, a plurality of heat sinks 32 are disposed at intervals along the length direction X of the beam body 22 .

[0162] In some embodiments, the material of the output pole base 30 includes thermally conductive plastic.

[0163] Exemplarily, the thermally conductive plastic uses a thermally conductive filler to uniformly fill a polymer matrix material to improve its thermal conductivity. The main components of the thermally conductive plastic include a matrix material and a filler. The matrix material includes polyphenylene sulfide, polyamide nylon, liquid crystal polymer, rubber, polycarbonate, polypropylene, polyphthalamide, polyetheretherketone, etc. The filler includes aluminum nitride, silicon carbide, aluminum oxide, graphite, fibrous high thermal conductivity carbon powder, flaky high thermal conductivity carbon powder, etc.

[0164] The above technical solution can further improve the heat dissipation efficiency of the output pole base 30 by using thermally conductive plastic to prepare the output pole base 30 .

[0165] According to some embodiments of the present application, the present application also provides an electrical device, including a battery device according to any of the above schemes, and the battery device is used to store or provide electrical energy.

[0166] If not otherwise specified, all implementations and optional implementations of the present application can be combined with each other to form a new technical solution. All technical features and optional technical features of the present application can be combined with each other to form a new technical solution.

[0167] In order to better understand the battery device provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery device in practical application is provided here for illustration.

[0168] The embodiment of the present application provides a battery device, which includes a battery cell 10, a box body 20, an output pole base 30 and a first connecting member 40. The box body 20 includes a receiving space 21 and a beam body 22 arranged along the periphery of the receiving space 21. The battery cell 10 is received in the receiving space 21. The output pole base 30 is made of thermally conductive plastic, and includes a base body 31, a heat sink 32 and a heat conductor 33. The base body 31 is connected to the beam body 22, and the heat sink 32 is connected to and protrudes from the surface of the base body 31. The first connecting member 40 includes a first end 41 and a second end 42 connected to each other. The first end 41 is connected to the base body 31, and the second end 42 is connected to the battery cell 10. The heat conductor 33 is clamped between the base body 31 and the first end 41.

[0169] The above technical solution can increase the total area of ​​the heat dissipation surface of the output pole base 30 by introducing the heat dissipation member 32, so as to increase the overall heat transfer area of ​​the output pole base 30, so that more heat can be dissipated through the contact between the output pole base 30 and the surrounding air. In addition, the heat conductive member 33 is clamped between the main body 311 and the first end 41, and the heat generated by the first end 41 of the first connecting member 40 can be quickly transferred to the output pole base 30 through the heat conductive member 33, thereby effectively improving the heat dissipation performance of the battery device.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, comprising a containing space and a beam body arranged along the periphery of the containing space, wherein the battery cell is contained in the containing space; The output pole base comprises a base body and a heat sink, wherein the base body is connected to the beam body, and the heat sink is connected to and protrudes from the surface of the base body.

2. The battery device according to claim 1, characterized in that: The battery device further includes a first connector, the first connector including a first end and a second end connected to each other, the first end is connected to the base body, and the second end is connected to the battery cell.

3. The battery device according to claim 2, characterized in that: The base body includes a main body portion and a fixing portion connected to each other, the beam body includes a first surface and a second surface, the first surface and the second surface are connected to each other, and the first surface is a side surface of the beam body facing away from the battery cell; The fixing portion is connected to the first surface, the main body is arranged on the second surface, the heat sink is connected to and protrudes from a side of the fixing portion facing away from the beam body, and the first end is connected to the main body.

4. The battery device according to claim 3, characterized in that: The output pole base further includes a heat conducting member, and the heat conducting member is clamped between the main body and the first end portion.

5. The battery device according to claim 4, characterized in that: The main body is provided with a first connection structure, the first end portion is connected to the first connection structure, and the heat conducting member is provided along the outer periphery of the first connection structure.

6. The battery device according to claim 4, characterized in that: The main body comprises a base, a first enclosure provided on the base, and two second enclosures provided on the base and opposite to each other, wherein the first enclosure is connected between the two second enclosures; the base, the first enclosure and the second enclosure form a receiving cavity; The heat conducting member and the first end are located in the accommodating cavity, and the heat conducting member is clamped between the base and the first end.

7. The battery device according to claim 6, characterized in that: The first connecting member further includes an abutting portion, which is connected between the first end portion and the second end portion, at least a portion of which is located in the accommodating cavity, and the abutting portion abuts against the first enclosure portion.

8. The battery device according to claim 4, characterized in that: The heat conducting member and the base body are an integrally formed structure.

9. The battery device according to claim 4, characterized in that: The hardness of the heat conducting member is smaller than the hardness of the base body.

10. The battery device according to claim 3, characterized in that: The fixing portion is extended along a direction parallel to the first surface.

11. The battery device according to claim 3, characterized in that: The fixing portion is provided with a second connection structure, and at least a portion of the heat sink is arranged along the periphery of the second connection structure.

12. The battery device according to claim 2, characterized in that: The battery device further includes a second connecting member connected to a side of the first connecting member facing away from the base body.

13. The battery device according to claim 2, characterized in that: The first connecting member and the output pole base are insert injection molding structures.

14. The battery device according to claim 1, characterized in that: There are multiple heat sinks, and the multiple heat sinks are arranged at intervals.

15. The battery device according to any one of claims 1 to 14, characterized in that: The material of the output pole base includes thermal conductive plastic.

16. An electrical device, characterized in that: The invention comprises a battery device as described in any one of claims 1 to 15, wherein the battery device is used to store or provide electrical energy.

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