Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises a plurality of battery monomers and a connecting assembly, the connecting assembly comprises a connecting piece and an insulating piece, the connecting piece is connected to the battery monomers, the insulating piece covers a part of the connecting piece from the outer side, and one side, far away from the connecting piece, of the insulating piece is provided with a plurality of first convex parts. According to the battery device provided by the embodiment of the invention, the heat dissipation performance and the insulation performance can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of batteries, and in particular to a battery device and an electric device. BACKGROUND

[0002] With the development of new energy technology, batteries are increasingly widely used, for example, in mobile phones, notebook computers, electric vehicles, electric vehicles, electric aircraft, electric ships, electric toy cars, electric toy ships, electric toy aircraft and electric tools.

[0003] The development of battery technology must take into account various design factors, for example, how to improve the thermal management performance of the battery device, which is an important research direction in the field of batteries. CONTENT OF THE INVENTION

[0004] The present application provides a battery device and an electric device, which can improve the thermal management performance of the battery device.

[0005] In a first aspect, the present application provides a battery device, comprising a plurality of battery monomers and a connecting assembly, the connecting assembly comprising a connecting piece and an insulating piece, the connecting piece being connected to the battery monomer, and the insulating piece covering a part of the connecting piece from the outside, and a plurality of first protrusions being provided on the side of the insulating piece away from the connecting piece.

[0006] In the technical solution of the present application, a connecting assembly for electrical connection is provided in the battery device, which comprises a connecting piece for electrical connection and an insulating piece covering part of the connecting piece, wherein a plurality of first protrusions are provided on the side of the insulating piece away from the connecting piece, i.e. the outside. These protruding structures can increase the outer surface area of the connecting assembly, increase the heat dissipation efficiency during operation, and thus improve the heat dissipation performance of the connecting assembly. At the same time, the first protrusions can provide support and protection, supporting the adjacent wire harness and other components, reducing the possibility of short circuit between other electrical connecting pieces and the connecting piece in the connecting assembly, and improving the safety of the battery device.

[0007] According to some embodiments of the present application, the first protrusions extend along the circumference of the connecting piece and are arranged around the connecting piece. The first protrusions can extend along the circumference and be distributed in a ring shape, which is easy to process and has good heat dissipation effect.

[0008] According to some embodiments of the present application, the first protrusions are arranged in a ring shape around the connecting piece. The first protrusions extend completely in the circumferential direction, further increasing the heat dissipation area.

[0009] According to some embodiments of the present application, the extending direction of the first protrusions is parallel to the extending direction of the connecting piece, and the first protrusions are arranged at intervals along the circumference of the connecting piece. The first protrusions extend in the same direction as the connecting piece and are arranged along the circumference, so that they are easy to process and have good heat dissipation effect.

[0010] According to some embodiments of the present application, the connecting piece comprises a first surface and a second surface arranged oppositely, and the first protrusions are arranged on the side close to the first surface and the side close to the second surface respectively. The first protrusions are arranged on both sides of the connecting piece, which further increases the heat dissipation area.

[0011] According to some embodiments of the present application, the minimum distance between adjacent first protrusions is greater than or equal to 1 mm, and the protruding size of the first protrusions in the radial direction of the connecting piece is greater than or equal to 0.5 mm. The first protrusions have appropriate distribution density and protruding size, which balances the heat dissipation performance and overall volume of the connecting assembly.

[0012] According to some embodiments of the present application, the size of the first protrusion in the width direction perpendicular to the extending direction of the first protrusion is greater than or equal to 0.5 mm.

[0013] According to some embodiments of the present application, the insulating piece comprises an insulating body and the first protrusions, the insulating body covers the connecting piece, and the first protrusions are connected to the side of the insulating body away from the connecting piece. The first protrusions are entirely formed by the insulating piece, so that they are easy to process.

[0014] According to some embodiments of the present application, the first protrusions are adhesively connected, clamped connected or integrally arranged with the insulating body. The connection between the first protrusions and the insulating body is stable.

[0015] According to some embodiments of the present application, the first protrusions are arranged on the insulating body, and the thermal conductivity of the first protrusions is greater than that of the insulating body. The first protrusions are made of a material with higher thermal conductivity, which further improves the heat dissipation efficiency.

[0016] According to some embodiments of the present application, the connecting piece comprises a connecting body and second protrusions, the second protrusions are connected to the connecting body, the insulating piece covers part of the connecting body and is provided with recesses, the recesses are located in the first protrusions, and the second protrusions are accommodated in the recesses. The connecting piece is provided with the second protrusions which are arranged in the recesses of the first protrusions, so that the insulating piece is easy to process, and the heat dissipation efficiency is further improved.

[0017] According to some embodiments of the present application, the second protrusions are integrally arranged or welded with the connecting body. The connection between the second protrusions and the connecting body is stable.

[0018] According to some of the embodiments of the present application, the connecting member comprises a transmission part and two connecting parts respectively located at the opposite two end parts of the transmission part, one of the connecting parts is electrically connected with the battery monomer, and the insulating member covers the transmission part. The area of the connecting member except for the area for electrical connection is covered with the insulating member, thereby improving the reliability of the battery device.

[0019] According to some of the embodiments of the present application, the thermal conductivity of the insulating member is greater than or equal to 0.5 W / (m·K). The insulating member is made of a material with high thermal conductivity, thereby improving the heat dissipation efficiency.

[0020] According to some of the embodiments of the present application, the thickness of the insulating member is greater than or equal to 0.3 mm. The thickness of the insulating member is increased, thereby improving the insulation reliability.

[0021] According to some of the embodiments of the present application, the battery device further comprises an output pole piece, the output pole piece is electrically connected between the battery monomer and the connecting assembly. The connecting assembly can be used to electrically connect the output pole piece of the whole battery device and the internal battery monomer.

[0022] In the second aspect, the present application provides a power utilization device, comprising the battery device in any of the embodiments of the first aspect, and the battery device is used to provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:

[0024] Figure 1 A simple schematic diagram of a vehicle is provided for some embodiments of the present application;

[0025] Figure 2 An exploded schematic diagram of a battery device is provided for some embodiments of the present application;

[0026] Figure 3 A partial structural schematic diagram of a battery device is provided for some embodiments of the present application;

[0027] Figure 4 A structural schematic diagram of a connecting assembly is provided for some embodiments of the present application;

[0028] Figure 5 A structural schematic diagram of a connecting assembly is provided for some other embodiments of the present application;

[0029] Figure 6 A structural schematic diagram of a connecting member is provided for some embodiments of the present application;

[0030] Figure 7 Structure diagram of a connecting member provided for another embodiment of the present application;

[0031] Figure 8 Structure diagram of a connecting member provided for another embodiment of the present application; Figure 4 Structure diagram of a cross section of the A-A' area shown.

[0032] Reference signs:

[0033] 1000 - vehicle;

[0034] 100 - battery device; 200 - controller; 300 - motor;

[0035] 10 - battery cell; 20 - connecting assembly; 30 - box; 40 - output tab;

[0036] 21 - connecting member; 22 - insulating member; 23 - first protrusion; 31 - first box portion; 32 - second box portion; 33 - accommodating portion;

[0037] 211 - first surface; 212 - second surface; 213 - connecting body; 214 - second protrusion; 215 - transmission portion; 216 - connecting portion; 221 - insulating body; 222 - recessed portion. DETAILED DESCRIPTION

[0038] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0039] 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 the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings, are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. 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 indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0041] Reference to“an embodiment” herein 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 appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment in a manner known to those of ordinary skill in the art.

[0042] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which can represent three relationships, for example, A and / or B, which can represent three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0043] In the description of the embodiments of the 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).

[0044] In the description of the embodiments of the 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 based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do 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 application.

[0045] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0046] In the embodiments of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0047] The battery cell 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. The embodiments of the present application are not limited thereto.

[0048] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging of the battery cell, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, and can prevent the positive and negative electrodes from short-circuiting while allowing the active ions to pass through.

[0049] In some embodiments, the electrode assembly is provided with tabs, which can guide current out of the electrode assembly. The tabs include positive tabs and negative tabs.

[0050] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate the electrode assembly and other components such as electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (e.g., polypropylene), a composite metal shell (e.g., a copper-aluminum composite shell), or an aluminum-plastic film, etc.

[0051] In some embodiments, the housing can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly for outputting or inputting the electrical energy of the battery cell.

[0052] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shapes of battery cells, the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, for example, a hexagonal prismatic battery cell, etc. The present application is not particularly limited.

[0053] The battery referred to in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0054] In some embodiments, the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0055] In some embodiments, the battery can be a battery pack, and the battery pack includes a box body and battery cells, and the battery cells or battery modules are contained in the box body.

[0056] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and longitudinal beam of the vehicle.

[0057] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0058] In a battery device, a plurality of battery cells are usually provided, and connecting assemblies are usually provided between the battery cells and between the battery cells and external components outside the battery device for achieving electrical connection, the surfaces of the connecting assemblies usually need to be provided with an insulating layer, the insulating layer is used to insulate the conductive parts inside the connecting assemblies from the external components, and the conductive parts inside the connecting assemblies need to pass a large current during fast charging and the like.

[0059] On this basis, since the thermal conductivity of the existing insulating layer is low and the surface area is small, the heat dissipation performance is poor, in order to avoid the temperature rise of the connecting assembly being too high under the fast charging condition, it is usually necessary to increase the cross-sectional area of the internal conductive part, resulting in the increase of the volume and the cost of the whole connecting assembly.

[0060] In view of this, the embodiment of the present application provides a technical scheme, which can improve the heat dissipation efficiency of the connecting assembly by increasing the heat dissipation area of the connecting assembly.

[0061] The technical scheme described in the embodiment of the present application is applicable to a battery and a power consumption device using the battery, the power consumption device is, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric vehicle, a ship, a spacecraft, an electric toy and an electric tool, etc., wherein the spacecraft is, for example, an airplane, a rocket, a space shuttle and a spacecraft, etc., the electric toy includes, for example, a fixed or mobile electric toy, specifically, a game console, an electric car toy, an electric ship toy and an electric plane toy, etc., the electric tool includes, for example, a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, specifically, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer.

[0062] The battery cell described in the embodiment of the present application is not only limited to the above described power consumption device, but for the sake of simplicity, the following embodiments are described taking an electric vehicle as an example.

[0063] Please refer to Figure 1 , Figure 1A simple schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. The vehicle 1000 can be provided with a battery inside, for example, at the bottom, the front, or the rear of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, 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 can be used to control the power supply of the motor 300 by the battery. The battery can be used for starting, navigation, etc. of the vehicle 1000, and of course, the battery can also be used to drive the vehicle 1000 to run, instead of or partially instead of fuel or natural gas to provide driving for the vehicle 1000.

[0064] Figure 2 An explosion schematic diagram of a battery device is provided for some embodiments of the present application. As shown in Figure 2 The battery device 100 includes a box 30 and a battery cell 10, and the battery cell 10 is contained in the box 30.

[0065] The box 30 is used to contain the battery cell 10, and the box 30 can be of various structures. In some embodiments, the box 30 can include a first box part 31 and a second box part 32, the first box part 31 and the second box part 32 are mutually covered, and the first box part 31 and the second box part 32 jointly define a containing part 33 for containing the battery cell 10. The second box part 32 can be a hollow structure with one end open, and the first box part 31 is a plate-like structure, which is covered on the open side of the second box part 32 to form the box 30 with the containing part 33; the first box part 31 and the second box part 32 can also be hollow structures with one side open, and the open side of the first box part 31 is covered on the open side of the second box part 32 to form the box 30 with the containing part 33. Of course, the first box part 31 and the second box part 32 can be of various shapes, such as a cylinder, a cuboid, etc.

[0066] In the battery, the battery cell 10 can be one or multiple. If the battery cell 10 is multiple, the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection, which means that the multiple battery cells 10 are connected in series and in parallel. The multiple battery cells 10 can be directly connected in series, in parallel, or in a mixed connection, and then the whole of the multiple battery cells 10 is contained in the box 30; of course, the multiple battery cells 10 can first be connected in series, in parallel, or in a mixed connection to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, which is contained in the box 30.

[0067] In some embodiments, the battery cells 10 are multiple, and the multiple battery cells 10 are connected in series or in parallel or in a mixed manner to form a battery module. The multiple battery modules are connected in series or in parallel or in a mixed manner to form a whole and are accommodated in the box 30.

[0068] Next, the structure of the battery device 100 and the power consumption equipment will be described with reference to the accompanying drawings. Figure 3 to the accompanying drawings Figure 7 The structure of the battery device 100 and the power consumption equipment will be described.

[0069] Please refer to Figure 3 to Figure 5 , Figure 3 The partial structure schematic diagram of the battery device provided by some embodiments of the present application is shown in FIG. 1. Figure 4 The structure schematic diagram of the connecting assembly provided by some embodiments of the present application is shown in FIG. 2. Figure 5 The structure schematic diagram of the connecting assembly provided by some embodiments of the present application is shown in FIG. 3.

[0070] In the first aspect, the present application provides a battery device 100, which comprises multiple battery cells 10 and a connecting assembly 20. The connecting assembly 20 comprises a connecting piece 21 and an insulating piece 22. The connecting piece 21 is connected to the battery cell 10. The insulating piece 22 covers a part of the connecting piece 21 from the outside. A side of the insulating piece 22 away from the connecting piece 21 is provided with multiple first protrusions 23.

[0071] The embodiments of the present application provide a battery device 100, which comprises multiple battery cells 10 for storing / releasing electric energy and a connecting assembly 20 for realizing the electrical connection between the battery cells 10 or the electrical connection between the battery cells 10 and external components. The multiple battery cells 10 can be arranged in an array. At least one side end of the connecting assembly 20 can be electrically connected to the electrode terminals of the battery cells 10.

[0072] Optionally, the battery device 100 can further comprise a box 30 and other current collecting components for electrically connecting the multiple battery cells 10, sampling components for collecting signals of the battery cells 10, etc. The multiple battery cells 10 can be arranged in the box 30 and connected in series, in parallel or in a mixed manner through the current collecting components.

[0073] Specifically, the connecting component 20 includes a connecting member 21 and an insulating member 22, wherein the connecting member 21 is used to realize the electrical connection function, and the connecting member 21 can be made of a material with low resistivity such as metal, such as copper and its alloys, aluminum and its alloys, etc. The connecting member 21 can be directly or indirectly electrically connected to the battery cell 10, for example, it can be directly connected to the electrode terminal of the battery cell 10, or it can be connected to the busbar component as described above. The insulating member 22 is coated on a portion of the surface of the connecting member 21, and is used to insulate the connecting member 21 from other external components outside the connecting component 20, thereby reducing the possibility of short circuit between the connecting component 20 and external components. The insulating member 22 can be made of a non-metallic insulating material with a high thermal conductivity coefficient, such as thermally conductive plastic.

[0074] Optionally, the connector 21 may extend along a straight line, a broken line, or a curved path depending on the position of the parts to be connected, and the insulating member 22 may be configured according to the shape and structure of the connector 21. Specifically, the insulating member 22 is provided with a first protrusion 23 on the side facing away from the connector 21, i.e., on the outer side, which protrudes away from the connector 21. The first protrusion 23 is provided relative to the portion of the insulating member 22 where the first protrusion 23 is not provided, as well as the surface of the connector 21, to expand the overall outer surface area of ​​the connecting assembly 20, thereby increasing the area of ​​the connecting assembly 20 that can exchange heat with the external environment during the heat dissipation process, thereby improving the heat dissipation efficiency.

[0075] Optionally, along the radial direction of the connector 21, the orthographic projection of the first protrusion 23 may be smaller than the orthographic projection of the connector 21, and multiple first protrusions 23 may be arranged at intervals so that air flow can flow through between the first protrusions 23 and perform heat exchange, thereby further improving the heat dissipation efficiency.

[0076] In the technical solution of the embodiment of the present application, a connection assembly 20 for achieving electrical connection is provided within the battery device 100. This connection assembly 20 includes a connector 21 for electrical connection and an insulating member 22 covering a portion of the connector 21. Multiple first protrusions 23 are provided on the side of the insulating member 22 facing away from the connector 21, i.e., on the outside. These protruding structures increase the surface area of ​​the connection assembly 20, increasing heat dissipation efficiency during operation, and thereby improving the heat dissipation performance of the connection assembly 20. Furthermore, the first protrusions 23 provide support and protection, propping up adjacent components such as wiring harnesses and maintaining a certain distance from the internal connector 21. This reduces the possibility of short circuits between other electrical connectors 21 and the connector 21 within the connection assembly 20, thereby improving the safety of the battery device 100.

[0077] In some optional embodiments, the first protrusions 23 extend along the circumference of the connecting member 21 and are arranged around the connecting member 21 , and a plurality of first protrusions 23 are arranged at intervals along the extending direction of the connecting member 21 .

[0078] Optionally, the first protrusions 23 can adopt a structure extending along the circumference of the connecting member 21. The first protrusions 23 can extend completely in the aforementioned direction and present a ring shape, or the first protrusions 23 can have a gap in the circumference direction and present a U shape or a C shape, etc. The extension sizes of the first protrusions 23 in the circumference direction can be the same or different.

[0079] Optionally, the first protrusions 23 are arranged at intervals along the extension direction of the connecting member 21, and can be arranged at equal intervals. Each first protrusion 23 can extend along a plane or along a curved surface.

[0080] In the embodiment in which the first protrusions 23 extend along a plane, the planes on which the first protrusions 23 are located can optionally have the same included angle with the extension direction of the connecting member 21, i.e., the first protrusions 23 can extend parallel to each other, and the included angle can be a right angle. Arranging the first protrusions 23 to extend along a plane can reduce the resistance suffered by the airflow when flowing between adjacent first protrusions 23, thereby improving the heat exchange efficiency between the external air environment and the first protrusions 23 and improving the heat dissipation efficiency of the connecting assembly 20.

[0081] In the embodiment in which the first protrusions 23 extend along a curved surface, the extension trajectories of the first protrusions 23 in the circumference direction can present a zigzag shape or a wave shape, etc. Thus, the interval space between adjacent first protrusions 23 is utilized to further increase the heat dissipation area of the outer surface of the connecting assembly 20, thereby improving the heat dissipation efficiency.

[0082] By arranging the first protrusions 23 to extend along the circumference direction and be arranged at intervals in the extension direction, the first protrusions 23 can be easily processed and have good heat dissipation effect.

[0083] In some optional embodiments, the first protrusions 23 present a ring shape and surround the connecting member 21.

[0084] In the embodiment in which the first protrusions 23 extend along the circumference direction, each first protrusion 23 can optionally extend completely in the circumference direction and present a ring shape. Optionally, each first protrusion 23 can have the same or similar shape and extension direction, so as to be easily processed and facilitate the formation of a relatively uniform and regular gap between adjacent first protrusions 23, so that the airflow flows therebetween and promotes heat exchange.

[0085] By arranging the first protrusions 23 to extend completely in the circumference direction, the heat dissipation area can be further increased, thereby correspondingly improving the heat exchange efficiency of the connecting assembly 20.

[0086] In some optional embodiments, the extension direction of the first protrusions 23 is parallel to the extension direction of the connecting member 21, and the first protrusions 23 are arranged at intervals along the circumference of the connecting member 21.

[0087] In contrast to the aforementioned embodiment in which the first protrusions 23 are annular, the first protrusions 23 in the connection assembly 20 may also optionally extend in the same direction as the connector 21 and be spaced apart circumferentially around the connector 21. In this embodiment, the extension dimensions of the first protrusions 23 may be the same or different, and may all be the same as or slightly smaller than the dimension of the insulating member 22 in the extension direction of the connector 21.

[0088] It is understood that each first protrusion 23 can extend completely in the extension direction of the connecting member 21, or at least part of the first protrusion 23 can include multiple sub-portions spaced apart in the extension direction. The multiple first protrusions 23 can be optionally extended along the same or similar trajectory and arranged parallel to each other. At the same time, the spacing between the multiple first protrusions 23 in the circumferential direction of the connecting member 21 can be selected to be relatively uniform. Taking the cross-section of the connecting member 21 as an example, each side of the rectangle, that is, each corresponding side of the surface of the connecting member 21, can be simultaneously provided with multiple first protrusions 23, and these first protrusions 23 arranged on the same side can be optionally arranged at equal intervals.

[0089] Similar to the aforementioned first protrusion 23 extending in the circumferential direction, the extension trajectory of the first protrusion 23 can be selected to be straight, broken, wavy, etc. Setting the first protrusion 23 to extend along a straight line can facilitate the airflow passing through it; setting the first protrusion 23 to extend along a curve can further expand the heat dissipation area of ​​the first protrusion 23.

[0090] By extending the first protrusion 23 and the connecting member 21 in the same direction and arranging them along the circumferential direction, it is possible to facilitate processing and achieve good heat dissipation effect.

[0091] See also Figure 6 , Figure 6 Schematic diagram of the structure of the connector provided in some embodiments of the present application. In some optional embodiments, the connector 21 includes a first surface 211 and a second surface 212 disposed opposite to each other, and a plurality of first protrusions 23 are respectively disposed on a side close to the first surface 211 and a side close to the second surface 212.

[0092] In the embodiment where the first protrusion 23 and the connector 21 extend in the same direction, the first protrusion 23 may be optionally provided at corresponding positions on each surface of the connector 21 to increase the heat dissipation area of ​​the connecting assembly 20 .

[0093] Specifically, still taking the example that the cross section of the connecting piece 21 is rectangular, the connecting piece 21 has four surfaces, among which the first surface 211 and the second surface 212 with relatively large areas and arranged oppositely can be included, and the two sides of the insulating piece 22 corresponding to the two surfaces can be provided with a plurality of first protrusions 23, and the first protrusions 23 on the two sides can be arranged in axial symmetry about the reference surface, or the first protrusions 23 on the two sides can be arranged in central symmetry about the central axis of the connecting piece 21, so that the heat dissipation effect of the connecting assembly 20 at each position is relatively uniform.

[0094] Optionally, when the first protrusions 23 are arranged, they can be arranged on the side of the connecting piece 21 corresponding to the surface with a relatively large area, so as to arrange more first protrusions 23 and reduce the possibility of short circuit of the side with a relatively large area and other components.

[0095] In some optional embodiments, the minimum spacing between adjacent first protrusions 23 is greater than or equal to 1 mm, and in the radial direction of the connecting piece 21, the protruding size of the first protrusion 23 is greater than or equal to 0.5 mm.

[0096] Optionally, in order to enable airflow or cooling liquid to flow between adjacent two first protrusions 23 and improve heat exchange efficiency, the first protrusions 23 should have a certain spacing space in the arrangement direction, and specifically, the minimum size of the spacing space in the arrangement direction can be greater than or equal to 1 mm, for example, can be any one of 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm or between any two of them.

[0097] Optionally, in order to make the first protrusion 23 have a relatively sufficient heat dissipation area, the first protrusion 23 can be protruded in the radial direction of the connecting piece 21 by a size greater than or equal to 0.5 mm, for example, can be any one of 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, 1.5 mm or between any two of them.

[0098] It can be understood that the side of the insulating piece 22 away from the connecting piece 21 is provided with the first protrusion 23, and at the same time, the side surface can have a peripheral area surrounding the first protrusion 23, and the protruding size of the foregoing first protrusion 23 refers to the protruding size of the top end of the first protrusion 23 relative to the peripheral area, that is, the spacing in the radial direction of the connecting piece 21 between the side surface of the first protrusion 23 away from the connecting piece 21 and the peripheral area.

[0099] By limiting the spacing between adjacent first protrusions 23 and the protruding size of the first protrusion 23 relative to the adjacent area, the first protrusion 23 can have a suitable distribution density and height, balance the heat dissipation performance and overall volume of the connecting assembly 20, and reduce the possibility that the overall occupied space of the connecting assembly 20 is too large on the basis of making the connecting assembly 20 have a higher heat dissipation efficiency.

[0100] In some optional embodiments, the first protrusion 23 has a width in a direction perpendicular to the extending direction of the first protrusion 23, and the width is greater than or equal to 0.5 mm.

[0101] Similarly, the first protrusion 23 can have a certain width to further expand the heat dissipation area. Specifically, in a direction perpendicular to the extending direction of the first protrusion 23, the width of the first protrusion 23 can be greater than or equal to 0.5 mm, for example, at least one of 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, 1.5 mm, or between any two of them.

[0102] Optionally, when the first protrusion 23 is provided, the width of each first protrusion 23 can be the same or similar, and the width at each position in the extending direction of the first protrusion 23 can be the same or similar, so that the heat dissipation effect at each position is more uniform.

[0103] In some optional embodiments, the insulating member 22 includes an insulating body 221 covering the connecting member 21 and the first protrusion 23 connected to a side of the insulating body 221 away from the connecting member 21.

[0104] Optionally, the insulating member 22 in the connecting assembly 20 can include two parts, the insulating body 221 and the first protrusion 23, which can be provided integrally or connected after two independent structures.

[0105] The insulating body 221 covers the surface of the connecting member 21, which can be used to achieve the main function of insulating the connecting member 21 from external components, and the insulating body 221 can have a thin thickness and be formed with the connecting member 21. The first protrusion 23 is located on the side of the insulating body 221 away from the connecting member 21, and can be connected to the surface of the side of the insulating body 221.

[0106] Optionally, the first protrusion 23 can be connected to the surface of the insulating body 221, or according to the different materials of the first protrusion 23, an opening can be provided on the insulating body 221, and the first protrusion 23 can pass through the opening to be connected and fixed with the internal components such as the connecting member 21. The application does not make specific limitations on this, as long as the connecting assembly 20 can maintain good insulation performance.

[0107] By setting the first protrusion 23 as a whole formed by the insulating member 22, the first protrusion 23 can be easily processed, and the shape and size of the outer surface of the first protrusion 23 can be easily adjusted.

[0108] In some optional embodiments, the first protrusion 23 is adhesively connected, clamped connected or integrally provided with the insulating body 221.

[0109] Optionally, in the embodiment in which the insulating member 22 comprises a two-part structure of the insulating body 221 and the first protrusion 23, the insulating body 221 and the first protrusion 23 can be connected by integral setting, adhesive connection, clamping connection, etc.

[0110] Specifically, in the embodiment in which the first protrusion 23 and the insulating body 221 are made of the same material, the two components can be integrally formed, for example, by injection molding or extrusion molding, etc. In the embodiment in which the insulating body 221 and the first protrusion 23 are made of different materials, the two components can be connected by adhesive connection or clamping connection, etc. For example, the first protrusion 23 extends along the circumference of the connecting member 21, the first protrusion 23 can be annular and is sleeved on the side surface of the insulating member 22 away from the connecting member 21, and is fixed by interference connection.

[0111] By using the above connection mode, the first protrusion 23 and the insulating body 221 can be stably connected and facilitate heat conduction.

[0112] In some optional embodiments, the first protrusion 23 is arranged on the insulating body 221, and the thermal conductivity of the first protrusion 23 is greater than that of the insulating body 221.

[0113] Optionally, in order to further improve the heat dissipation efficiency, the first protrusion 23 and the insulating body 221 can be made of different materials, and the thermal conductivity of the first protrusion 23 is higher than that of the insulating body 221.

[0114] Specifically, the first protrusion 23 and the insulating body 221 can be arranged as independent structural members which are processed separately and then connected. For example, the insulating body 221 can be made of a thermally conductive plastic material with good electrical conductivity, and the first protrusion 23 can be made of a material with higher thermal conductivity such as metal, and then the two are connected. Since the insulating body 221 can provide electrical insulation function, the first protrusion 23 can be made of a material with electrical conductivity.

[0115] By making the first protrusion 23 from a material with higher thermal conductivity, the heat dissipation efficiency can be further improved.

[0116] Please refer to Figure 7 and Figure 8 , Figure 7 the structural schematic diagram of the connecting member provided by some other embodiments of the present application, Figure 8 for Figure 4A cross-sectional structure schematic view of the A-A' section is shown. In some alternative embodiments, the connecting member 21 comprises a connecting body 213 and a second protrusion 214 connected to the connecting body 213, and the insulating member 22 covers part of the connecting body 213 and is provided with a recess 222 located in the first protrusion 23, and the second protrusion 214 is accommodated in the recess 222.

[0117] Corresponding to the aforementioned second protrusion 214 formed by the insulating member 22, the connecting member 21 can alternatively have a protruding structure, specifically, the connecting member 21 can comprise a connecting body 213 and a second protrusion 214 protruding radially from the outer surface of the connecting body 213. The position and shape and size of the second protrusion 214 can be selected to be adapted to the shape and size required by the first protrusion 23.

[0118] Alternatively, the inside of the first protrusion 23, i.e. the side facing the connecting member 21, can be provided with a recess 222, and the second protrusion 214 can be alternatively provided in one-to-one correspondence with the recess 222 and extends into the recess 222, forming a structure in which the insulating member 22 is sleeved on the second protrusion 214 and at least partially conforms to the second protrusion 214.

[0119] Alternatively, the position, shape and size of the first protrusion 23 formed finally can be adjusted by adjusting the shape, size and position of the second protrusion 214 and the thickness and shape of the bottom of the recess 222 in the insulating member 22, and the connecting assembly 20 finally forms a protruding heat dissipation structure with appropriate distribution density and extension size. The second protrusion 214 can be made of the same or similar metal material as the connecting member 21 to further improve the heat dissipation efficiency.

[0120] By providing the connecting member 21 with the second protrusion 214 extending into the recess 222 in the first protrusion 23, the insulating member 22 can be easily processed, and the heat dissipation efficiency is further improved.

[0121] In some alternative embodiments, the second protrusion 214 is integrally provided with or welded to the connecting body 213.

[0122] In the embodiment in which the second protrusion 214 is provided on the connecting body 213, the second protrusion 214 and the connecting body 213 can be made of the same material, or the second protrusion 214 can be made of other material with a higher thermal conductivity than the connecting body 213.

[0123] On this basis, the second protrusion 214 can be integrally formed with the connecting body 213 to provide a more stable and strong structure for the connector 21. Alternatively, multiple second protrusions 214 can be welded to the connecting body 213 to facilitate adjustment of their position or change of their material. The second protrusions 214 form protrusions on the connecting body 213 that correspond in position and size to the first protrusions 23.

[0124] By manufacturing the connecting member 21 in an integral molding or welding connection manner, the second protrusion 214 and the connecting body 213 can be firmly connected, so that the connecting member 21 as a whole has a high structural strength.

[0125] In some optional embodiments, the connector 21 includes a transmission portion 215 and two connection portions 216 located at opposite ends of the transmission portion 215 , one of the connection portions 216 is electrically connected to the battery cell 10 , and the insulating member 22 is arranged to cover the transmission portion 215 .

[0126] The connecting assembly 20 in the battery device 100 is used to achieve electrical connection between components. The connecting member 21, which serves as the primary conductive structure, may optionally include a transmission portion 215 and a connecting portion 216. The connecting portions 216 are disposed at opposite ends of the transmission portion 215. The transmission portion 215 and the connecting portion 216 may be integrally formed. The connecting portions 216 are staggered from the insulating member 22 and are used to electrically connect to the battery cells 10 or other components. The transmission portion 215 is connected between the connecting portions 216 and is covered by the insulating member 22 to achieve electrical connection between the connecting portions 216.

[0127] Optionally, the shape and size of the connecting portion 216 can be set according to the shape, size and connection method of the connection of the connected part 21, and the shape and size of the transmission portion 215 can be set according to the position of the connecting portion 216 and whether other components need to be avoided. This application does not make any specific restrictions on this.

[0128] It is understood that the connector 21 can be connected between two components, or the connecting end can be electrically connected to three or more components simultaneously. The number of connecting portions 216 in the connector 21 can be the same as the number of components 21 to be connected, and they can be arranged in a one-to-one correspondence. Alternatively, in an embodiment where the connector 21 is electrically connected to three or more components simultaneously, if two components are close together, they can share a common connecting portion 216. The transmission portion 215 can then electrically connect each connecting portion 216 to each other.

[0129] By covering the entire area of ​​the connector 21 except the connecting portion 216 for electrical connection with the insulating member 22 , the reliability of the battery device 100 can be further improved.

[0130] In some optional embodiments, the thermal conductivity of the insulating member 22 is greater than or equal to 0.5 W / (m·K).

[0131] Optionally, when providing the insulating member 22, the insulating member 22 can be made of a material with a high thermal conductivity coefficient, provided that the insulation performance meets the requirements, to improve the heat dissipation efficiency of the insulating member 22 itself. Specifically, the thermal conductivity coefficient of the insulating member 22 can be selected to be greater than or equal to 0.5 W / (m·K), and the insulating member 22 can be made of a material such as a thermally conductive plastic.

[0132] Optionally, in an embodiment in which the insulating member 22 is made of the same material as a whole and is integrally arranged, all parts of the insulating member 22 can be made of a material such as a thermally conductive plastic having a thermal conductivity greater than or equal to 0.5 W / (m·K). In an embodiment in which the insulating member 22 includes an independent insulating body 221 and a first protrusion 23, the first protrusion 23 can be made of a material with a higher thermal conductivity, such as metal, to further improve the heat dissipation efficiency.

[0133] By making the insulating member 22 from a material with a high thermal conductivity, the heat dissipation efficiency of the connecting assembly 20 can be further improved.

[0134] In some optional embodiments, the thickness of the insulating member 22 is greater than or equal to 0.3 mm.

[0135] The connecting component 20 includes a connecting part 21 and an insulating part 22. The insulating part 22 is used to insulate the non-connected area of ​​the connecting part 21 from other components, thereby reducing the possibility of short circuit at the connecting component 20. On this basis, the insulating part 22 usually needs to have a certain thickness to improve reliability and insulation performance.

[0136] Specifically, the thickness of the insulating member 22 can be selected to be greater than or equal to 0.3 mm, for example, it can be any one of 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm or between any two of them. By limiting the lower limit of the thickness of the insulating member 22, the insulating member 22 can have good insulation performance, improve the insulation reliability of the insulating member 22, and thereby improve the reliability of the battery device 100.

[0137] In some optional embodiments, the battery device 100 further includes an output electrode 40 , which is electrically connected between the battery cell 10 and the connection assembly 20 .

[0138] The connecting assembly 20 in the battery device 100 is used to realize electrical connection between components, including electrical connection between internal components of the battery device 100 and electrical connection between the internal components and external components. For example, the battery device 100 can include a box 30, and the box 30 can be provided with an output tab 40 for leading out the internal battery monomer 10. One end of the output tab 40 is electrically connected to the battery monomer 10, and is optionally directly or indirectly connected to the electrode terminal of the battery monomer 10 arranged near the output tab 40. The other end of the output tab 40 can be electrically connected to other external components, such as a BDU (Battery Disconnect Unit, battery pack disconnect unit) and the like, through the connecting assembly 20.

[0139] By using the connecting assembly 20 in the embodiments of the present application for electrical connection at the above-mentioned electrical connection position, the heat dissipation efficiency of the corresponding position can be effectively improved on the basis of lower processing cost, and the reliability of the battery device 100 as a whole can be improved.

[0140] In a second aspect, the present application provides a power consumption device, which includes the battery device 100 in any one of the embodiments of the second aspect, and the battery device 100 is used to provide electric energy.

[0141] The power consumption device in the embodiments of the present application has all the beneficial effects of the battery device 100 in the first aspect, and specific descriptions can be referred to the specific descriptions of the battery device 100 in the above-mentioned embodiments. The present embodiment will not be described here again.

[0142] The embodiments of the present application provide a battery device 100, which includes a plurality of battery monomers 10 and a connecting assembly 20. The connecting assembly 20 includes a connecting piece 21 and an insulating piece 22. The connecting piece 21 is connected to the battery monomer 10. The insulating piece 22 covers a part of the connecting piece 21 from the outside. A plurality of first protrusions 23 are arranged on the side of the insulating piece 22 away from the connecting piece 21. The insulating piece 22 includes an insulating body 221 and the first protrusions 23. The insulating body 221 covers the connecting piece 21. The first protrusions 23 are connected to the side of the insulating body 221 away from the connecting piece 21. The insulating body 221 and the first protrusions 23 are integrally arranged. The first protrusions 23 extend along the circumference of the connecting piece 21 and surround the connecting piece 21. The plurality of first protrusions 23 are arranged at intervals along the extension direction of the connecting piece 21.

[0143] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope 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 in that: include: Multiple battery cells; The connecting assembly includes a connecting member and an insulating member. The connecting member is connected to the battery cell. The insulating member covers a portion of the connecting member from the outside. A plurality of first protrusions are provided on a side of the insulating member away from the connecting member.

2. The battery device according to claim 1, wherein: The first protrusions extend along the circumference of the connecting member and are arranged around the connecting member. A plurality of the first protrusions are arranged at intervals along the extending direction of the connecting member.

3. The battery device according to claim 2, characterized in that The first protrusion is annular and is arranged around the connecting piece.

4. The battery device according to claim 1, wherein: An extending direction of the first protrusion is parallel to an extending direction of the connecting member, and a plurality of the first protrusions are arranged at intervals along the circumference of the connecting member.

5. The battery device according to claim 4, characterized in that The connecting member includes a first surface and a second surface that are opposite to each other, and a plurality of first protrusions are respectively arranged on a side close to the first surface and a side close to the second surface.

6. The battery device according to claim 1, wherein: The minimum spacing between adjacent first protrusions is greater than or equal to 1 mm, and in the radial direction of the connecting member, the protruding size of the first protrusion is greater than or equal to 0.5 mm.

7. The battery device according to claim 1, wherein: The dimension of the first protrusion in a width direction perpendicular to its own extending direction is greater than or equal to 0.5 mm.

8. The battery device according to any one of claims 1 to 7, characterized in that: The insulating member includes an insulating body and a first protrusion. The insulating body covers the connecting member. The first protrusion is connected to a side of the insulating body facing away from the connecting member.

9. The battery device according to claim 8, characterized in that The first protrusion is connected to the insulating body by bonding, snapping or integrally arranged.

10. The battery device according to claim 9, characterized in that The first protrusion is mounted on the insulating body, and the thermal conductivity of the first protrusion is greater than the thermal conductivity of the insulating body.

11. The battery device according to any one of claims 1 to 7, characterized in that: The connecting member includes a connecting body and a second protrusion, the second protrusion is connected to the connecting body, the insulating member covers a portion of the connecting body and is provided with a recess, the recess is located in the first protrusion, and the second protrusion is accommodated in the recess.

12. The battery device according to claim 11, wherein: The second protrusion is integrally formed with the connection body or is welded to the connection body.

13. The battery device according to claim 1, wherein: The connecting member includes a transmission portion and two connecting portions respectively located at opposite ends of the transmission portion, wherein one of the connecting portions is electrically connected to the battery cell, and the insulating member is arranged to cover the transmission portion.

14. The battery device according to claim 1, wherein: The thermal conductivity of the insulating member is greater than or equal to 0.5 W / (m·K).

15. The battery device according to claim 1, wherein: The thickness of the insulating member is greater than or equal to 0.3 mm.

16. The battery device according to claim 1, wherein: The battery device further includes an output electrode, which is electrically connected between the battery cell and the connecting assembly.

17. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 16, wherein the battery device is used to provide electrical energy.

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