Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and a power utilization device. The battery device comprises a box body, a plurality of single batteries and a connecting assembly, a first accommodating space is defined by the box body, and the single batteries are arranged in the first accommodating space; the connecting assembly is arranged in the box body, the connecting assembly comprises at least one connecting terminal, a plurality of threaded connecting pieces are arranged at one end of the connecting terminal in the first direction, the threaded connecting pieces are used for being connected with the side of an electric device, and the other end of the connecting terminal is electrically connected with the single batteries. Through the application, the open area of the connecting assembly can be increased, the stress of a connecting interface can be dispersed, the aging of the threaded connecting piece and the connecting assembly can be slowed down, and the long-term reliability of the connecting assembly and the battery device can be improved.

Description

TECHNICAL FIELD

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

[0002] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like.

[0003] In new energy vehicles equipped with batteries, the batteries can be used to provide power in whole or in part. In the field of energy storage, the batteries can be installed in an energy storage box or directly installed at a user side. The batteries are generally electrically connected to external power devices through a connecting assembly. In application scenarios, the connecting assembly has the problems of small current carrying capacity and poor connection reliability. Therefore, how to improve the current carrying capacity and connection reliability of the connecting assembly is one of the research and development topics in the industry. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the present application provides a battery device and a power utilization device.

[0005] The present application is implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a battery device, which comprises a box body, a plurality of battery monomers and a connecting assembly. The box body defines a first accommodating space, and the plurality of battery monomers are arranged in the first accommodating space. The connecting assembly is arranged in the box body, and the connecting assembly comprises at least one connecting terminal. In a first direction, one end of the connecting terminal is provided with a plurality of threaded connectors, the threaded connectors are used to be connected to a power utilization device side, and the other end of the connecting terminal is electrically connected to the battery monomers.

[0007] Since the power utilization device side and the connecting terminal are connected through the plurality of threaded connectors, the overcurrent area of the connecting terminal can be increased, and the contact resistance can be reduced. On the other hand, multi-point fixation can also disperse the current load and stress compared to single-point fixation, slow down the aging of the connecting piece, and improve the long-term connection reliability.

[0008] In some embodiments, the threaded connectors are bolts or nuts, one end of the connecting terminal in the first direction has a conductive contact surface, and the conductive contact surface is provided with the plurality of threaded connectors.

[0009] In this way, the assembly structure of the connecting terminal, the power utilization device side and the battery monomers can be optimized. In addition, in the case that there is a tolerance or a warped edge on the power utilization device side, the plurality of threaded connectors can stably lock the conductive contact surface, the connecting piece on the power utilization device side is flat, the risk of connection failure caused by single-point loosening is avoided, and the overcurrent area and the connection reliability are further improved.

[0010] In some embodiments, the connection terminal has a first end and a second end in a first direction, the first end has the conductive contact surface, the connection assembly comprises a first connection terminal and a second connection terminal arranged in a second direction, the second direction is perpendicular to the first direction, and the first end of the first connection terminal is recessed relative to the first end of the second connection terminal when viewed in the second direction.

[0011] Thus, the staggered arrangement of the two connection terminals in the first direction facilitates the formation of physical isolation and improves insulation performance. Moreover, under the premise of meeting the electrical clearance and creepage distance, the space occupation of the two connection terminals in the first direction is compressed, the overall space occupation of the connection assembly is reduced, and the space utilization of the connection assembly is improved.

[0012] In some embodiments, the second end of the first connection terminal is recessed relative to the second end of the second connection terminal when viewed in the second direction.

[0013] Thus, the space occupation of the two connection terminals in the first direction is further compressed, and the overall space occupation of the connection assembly is further reduced.

[0014] In some embodiments, the projection of the first connection terminal and the projection of the second connection terminal at least partially do not overlap when projected in the second direction to a projection plane perpendicular to the second direction.

[0015] Thus, by the projection in the third direction, the staggered arrangement of the second ends in the third direction is achieved, which facilitates the formation of physical isolation, meets the electrical clearance and creepage distance, and improves the insulation performance.

[0016] In some embodiments, a plurality of the threaded connectors are arranged in the third direction, one end of the second end is recessed inward to form a recessed portion, the first direction, the second direction and the third direction are perpendicular to each other; the first recessed portion of the first connection terminal and the second recessed portion of the second connection terminal are oppositely arranged in the third direction.

[0017] Since the first recessed portion and the second recessed portion are oppositely arranged, the first connection terminal and the second connection terminal are staggered in the third direction, which can further compress the distance between the connection terminals under the premise of meeting the electrical clearance and creepage distance, reduce the space occupied by the connection terminals in the third direction, and improve the compactness and space utilization of the overall structure.

[0018] In some embodiments, the connection assembly comprises a housing, the housing defines a second accommodation space, and the second accommodation space accommodates at least part of the connection terminal.

[0019] Thus, the shell provides physical protection and insulation, improves safety, and delays aging of the connecting terminal and the threaded connector.

[0020] In some embodiments, the battery device includes a busbar disposed in the first accommodating space, and the plurality of battery cells are electrically connected to the second end through the busbar.

[0021] Thus, the busbar integrates the currents of the plurality of battery cells, simplifies the internal electrical connection structure of the box, and saves internal space of the box.

[0022] In some embodiments, the cross-sectional area of the connecting terminal for carrying current is in the range of 90 mm 2 to 300 mm 2 .

[0023] Since the cross-sectional area of the connecting terminal for carrying current is in the appropriate range, the connecting terminal can adapt to the current demand of the battery device of different power, evenly distribute the current, avoid local overheating and aging, and also take into account the electrical connection reliability and space utilization.

[0024] The second aspect of the embodiments of the present application provides a power consumption device including a plurality of battery devices of the first aspect of the embodiments of the present application and an electrical connector, the electrical connector being connected to the connecting terminal through the plurality of threaded connectors, and the battery device being used for storing or providing electric energy.

[0025] Thus, the reliability of the power consumption device can be improved. The risk of power supply interruption and excessive heating due to poor contact under the condition that the power consumption device is subjected to vibration and impact is reduced, which is beneficial to continuous power supply of the battery device.

[0026] In some embodiments, the power consumption device includes a plug configured to accommodate at least part of the electrical connector.

[0027] The connecting assembly includes a socket configured to accommodate at least part of the connecting terminal, the plug and the socket being connected in plug-in connection, and the socket being fixedly connected to the box.

[0028] Thus, the plug and the socket are designed in a split manner, which simplifies the disassembly process of the shell, supports modular quick disassembly, improves overall assembly efficiency and structural reliability, and facilitates installation and later maintenance of the connecting assembly; the fixed connection of the socket and the box enhances the stability of the connecting terminal.

[0029] The beneficial effects of the embodiments of the present disclosure include: through the present application, the overcurrent area of the connecting assembly can be increased, the stress at the connection interface can be dispersed, the aging of the threaded connector and the connecting assembly can be slowed down, and the long-term reliability of the connecting assembly and the battery device can be improved.

[0030] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0031] 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 better understanding of the preferred embodiments, and are not to be considered as limiting of the present application. Moreover, in the drawings, like reference numerals refer to similar components throughout the several views. In the drawings:

[0032] Figure 1 Structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0033] Figure 2 Perspective exploded schematic diagram of a battery device provided for some embodiments of the present application;

[0034] Figure 3 Assembly schematic diagram of a connecting assembly and an electrical connector provided for some embodiments of the present application;

[0035] Figure 4 Structural schematic diagram of a socket provided for some embodiments of the present application;

[0036] Figure 5 Front view of a socket provided for some embodiments of the present application;

[0037] Figure 6 Side view of a socket provided for some embodiments of the present application;

[0038] Figure 7 Top view of a socket provided for some embodiments of the present application;

[0039] Figure 8 Structural schematic diagram of a first connecting terminal provided for some embodiments of the present application;

[0040] Figure 9 Structural schematic diagram of a second connecting terminal provided for some embodiments of the present application;

[0041] Figure 10 Structural schematic diagram of a socket provided for some embodiments of the present application;

[0042] Figure 11 Structural schematic diagram of a socket provided for some embodiments of the present application; Figure 10 Cross-sectional view at A-A in FIG.

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 100, battery device; 10, battery cell; 20, connection assembly; 21, connection terminal; 21a, first connection terminal; 21b, second connection terminal; 211, first end; 211a, conductive contact surface; 212, second end; 213, recess; 213a, first recess; 213b, second recess; 22, electrical connection; 23, threaded connection; 23A, solder ring; 24, housing; S1, first accommodation space; S2, second accommodation space; 241, plug; 242, socket; 1000, vehicle; 101, box body; 102, cover body; 103, bottom plate; 200, controller; 300, motor. DETAILED DESCRIPTION

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the 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.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used herein are intended to cover a non-exclusive inclusion.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the 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 and specifically limited.

[0048] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0050] In the description of the embodiments of the present application, the directions or positional relationships indicated by the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, operate or be used in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0053] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "parallel" and "perpendicular" allow a certain degree of tolerance and / or error, including approximately parallel and approximately perpendicular.

[0054] In the following, the present application will be described in detail.

[0055] At present, new energy batteries are more and more widely used in life and industry. New energy batteries are not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also increasing.

[0056] In many application scenarios, the battery device is electrically connected to the external power device through a connecting assembly. The connecting assembly has the problems of small current-carrying capacity and poor connection reliability. A single bolt is used to fix the connection between the terminal and the electrical connector on the device side. When the size of the connection terminal deviates or the connection terminal is stressed, the strength of the bolt is insufficient to support the stability of the electrical connection interface. Therefore, how to improve the current-carrying capacity and connection reliability of the connecting assembly is one of the research topics in the industry.

[0057] Through research and design, the number of locking threaded connectors is increased at the electrical connection interface, which can increase the flow area of the electrical connection interface, and the electrical connection is more stable by fully fitting the electrical connectors on the electrical device side with the connection terminals, thereby reducing the risk of connection failure and improving the connection reliability.

[0058] Based on such a design concept, the battery device includes a box body, a plurality of battery monomers, and a connection assembly. The box body defines a first accommodating space, and the plurality of battery monomers are arranged in the first accommodating space. The connection assembly is arranged on the box body and includes at least one connection terminal. In a first direction, a plurality of threaded connectors are arranged at one end of the connection terminal, the threaded connectors are used to connect the electrical device side, and the other end of the connection terminal is electrically connected with the battery monomer.

[0059] Since the electrical device side and the connection terminal are fixed by the plurality of threaded connectors, the flow area can be increased, and the contact resistance can be reduced. On the other hand, the multi-point fixation can also disperse the current load and stress compared with single-point fixation, slow down the aging of the threaded connectors, and improve the long-term connection reliability.

[0060] In the following embodiments, for the convenience of description, the electrical device of an embodiment of the present application is taken as a vehicle 1000 for example. The following is described in conjunction with the drawings.

[0061] Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. As shown in the figure, Figure 1 The vehicle 1000 is provided with a battery device 100 inside, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0062] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0063] Figure 2 A perspective exploded schematic diagram of the battery device 100 is provided for an embodiment of the present application. As Figure 2As shown, the battery apparatus 100 includes a bottom plate 103, a cover 102, and at least one battery cell 10. The cover 102 is arranged above the bottom plate 103 to form a box 101, thereby defining a first accommodating space S1 for the battery cell 10.

[0064] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0065] 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.

[0066] Although not shown, 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 process of the battery cell, active ions (e.g., lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time, allow the active ions to pass through.

[0067] In some embodiments, the electrode assembly is provided with a tab, which can guide the current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0068] In some embodiments, the electrode assembly can be in a winding structure, a laminated structure, or a hybrid structure of winding and laminating.

[0069] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes, including a square battery cell, a blade battery cell, a multi-prismatic battery cell, such as a hexagonal battery cell, etc. The present application is not particularly limited.

[0070] The discharge from the battery cell mentioned in the present application includes, but is not limited to, electrolyte, dissolved or split positive and negative electrode tabs, separator fragments, high-temperature and high-pressure gas generated by reaction, flame, etc.

[0071] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a hybrid manner through a busbar component.

[0072] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells by a cable tie.

[0073] In some embodiments, the battery device can be a battery pack, which includes a box and one or more battery cell assemblies, the battery cell assemblies are accommodated in the box.

[0074] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0075] As an example, the battery cell assembly can also be accommodated in the box by fixing a plurality of battery cells directly in the box.

[0076] As an example, the box can include a first box and a second box. The first box and the second box are buckled so that a closed space is formed inside the box to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0077] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected with the frame, so that a closed space is formed inside the box to accommodate the battery cell assembly.

[0078] As an example, the box can be part of the chassis structure of the vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0079] In some embodiments, the battery device refers to an energy storage device, which includes a box, at least one side of the box is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0080] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells and battery devices, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0081] In the following, the embodiments of the present application are described in detail. Figures 3 to 6 The embodiments of the present application are described in detail.

[0082] Figure 3Schematic diagrams of the connection components provided for some embodiments of this application; Figure 4 Schematic diagrams of the socket provided for some embodiments of this application; Figure 5 A front view of a socket provided for some embodiments of this application; Figure 6 Side view of a socket provided for some embodiments of this application; Figure 7 Top view of a socket provided for some embodiments of this application; Figure 8 A schematic diagram of the structure of the first connection terminal provided for some embodiments of this application; Figure 9 A schematic diagram of the structure of the second connection terminal provided for some embodiments of this application; Figure 10 Schematic diagrams of the socket provided for other embodiments of this application; Figure 11 for Figure 10 Sectional view at point AA.

[0083] In some embodiments of this application, for ease of explanation, a first direction, a second direction, and a third direction are defined. These directions intersect each other; here, intersecting includes perpendicularly intersecting. For ease of understanding of the embodiments of this application, the embodiments shown in Figures 3 to 9 are illustrated using the example of the first direction, second direction, and third direction being perpendicularly intersecting. However, those skilled in the art should understand that the embodiments of this application are not limited to the case where these three directions intersect perpendicularly. For ease of explanation, as... Figure 3 As shown by the arrows in Figure 10, the direction of arrow Z is the first direction, the direction of arrow X is the second direction, and the direction of arrow Y is the third direction. Sometimes, the direction that arrow Z points to along the third direction is called "up," and its opposite direction is called "down."

[0084] The first aspect of this application provides a battery device 100. In the embodiments of this application, such as... Figure 2 , Figure 3 As shown, the battery device 100 includes a housing 101, a plurality of battery cells 10, and a connecting assembly 20. Figure 2 (Not shown in the image) The housing 101 defines a first accommodating space S1, and a plurality of battery cells 10 are disposed in the first accommodating space S1; the connecting assembly 20 is disposed in the housing 101, and the connecting assembly 20 includes at least one connecting terminal 21. Along the first direction (Z), one end of the connecting terminal 21 is provided with a plurality of threaded connectors 23, which are used to connect to the electrical device side, and the other end of the connecting terminal 21 is electrically connected to the battery cell 10.

[0085] It should be noted that the above-mentioned power consuming device refers to a device that needs to be provided with power by the battery device 100, and the "power consuming device side" in the embodiments of the present application refers to a component or interface that distributes or uses power. Taking the vehicle 1000 as an example, the power consuming device side can be a high-voltage distribution box or other high-voltage electrical appliances.

[0086] Optionally, the material of the box body 101 can be an alloy material such as an aluminum alloy or a ferrous alloy, or a high polymer material such as polycarbonate or polyisocyanate foam plastic, or a composite material such as glass fiber and epoxy resin.

[0087] Optionally, the box body 101 can adopt various structures. Optionally, the box body 101 can be a hollow structure with one side open, and the cover body 102 is covered on the open side to form the box body 101 with a placing space in cooperation with the bottom plate 103. Alternatively, the box body 101 can also be configured as a closed box body 101, and the inside is limited to define the first containing space S1.

[0088] Optionally, the plurality of battery monomers 10 can be electrically connected with the connecting assembly 20 through wires, busbars and other components.

[0089] It can be understood that the connecting assembly 20 is a component set for electrically connecting the battery monomers 10 or the battery monomers 10 and the external circuit; the connecting terminal 21 is a component for conducting electricity in the connecting assembly 20, and the first end 211 and the second end 212 of the connecting terminal 21 can also conduct electricity.

[0090] It can be understood that the threaded connecting piece can conduct electricity and lock and fix the relative positions of the electrical connecting piece 22 of the power consuming device side and the connecting terminal 21, thereby improving the connection reliability.

[0091] Optionally, the threaded connecting piece 23 can be a bolt, a nut or other structural member with threads.

[0092] It can be understood that the power consuming device refers to a power consuming equipment, including but not limited to a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.

[0093] Optionally, the electrical connecting piece 22 can be a copper bar, an aluminum bar, a wire, etc.

[0094] Optionally, the number of threaded connecting pieces 23 on each connecting terminal 21 can be two, three, four, five, etc. Other numbers are not listed in the embodiments.

[0095] Optionally, the plurality of threaded connecting pieces 23 can be arranged according to the number thereof, for example, three threaded connecting pieces 23 can be arranged in a row, or arranged in a triangle. The embodiments are not listed.

[0096] Optionally, the shape and size of the threaded connection 23 of each connection terminal 21 can be the same or different. The embodiments of the present application do not make any limitation in this regard.

[0097] Optionally, the shape and size of the threaded connection 23 of each connection terminal 21 can be the same or different. The embodiments of the present application do not make any limitation in this regard.

[0098] Exemplarily, the bolt in the embodiments of the present application can be a hexagonal bolt, which has good tightening torque and anti-loosening performance.

[0099] Optionally, the material of the connection terminal 21 can be a metal material such as copper, aluminum, iron, etc. The surface can be plated with gold, silver, zinc, etc. The embodiments of the present application do not make any limitation in this regard.

[0100] Exemplarily, the connection terminal 21 can be a conductive metal strip.

[0101] Exemplarily, the connection terminal 21 can be a copper strip or an aluminum strip.

[0102] Exemplarily, the connection terminal 21 can be provided with a plurality of bolt holes for setting bolts.

[0103] Exemplarily, the electrical connection 22 is provided with a plurality of bolt holes for setting bolts.

[0104] It can be understood that the bolt holes of the connection terminal 21 and the bolt holes of the electrical connection 22 correspond to each other, and the bolts pass through both of them at the same time.

[0105] It can be understood that the bolts can cooperate with nuts to clampingly fix the electrical connection 22.

[0106] Since the power consuming device side and the connection terminal 21 are connected through a plurality of bolts, the overcurrent area of the connection terminal 21 can be increased, and the contact resistance can be reduced. On the other hand, the multi-point fixation can also disperse the current load and stress compared with single-point fixation, slow down the aging of the bolts, and improve the long-term connection reliability.

[0107] It can be understood that the overcurrent area mentioned above refers to the effective area of the contact part of the electrical connection 22 and the connection terminal 21 that can allow the current to pass through. The larger the overcurrent area is, the smaller the current density under the same current is, and the less likely it is to heat. The contact resistance mentioned above is the resistance at the contact interface of the electrical connection 22 and the connection terminal 21. The smaller the contact resistance is, the less the power loss is, and the more stable the connection is. Dispersing the current load and stress means that the plurality of bolts jointly bear the transmission of the current and the mechanical stress of the connection part, so as to avoid that a single bolt is quickly worn or damaged due to excessive load.

[0108] In the embodiments of the present application, as shown in Figure 7As shown, the threaded connectors 23 are bolts or nuts, and the connection terminal 21 has a conductive contact surface 211a at one end in the first direction (Z), which is provided with a plurality of threaded connectors 23.

[0109] It can be understood that the conductive contact surface 211a is a surface of the connection terminal 21 that contacts and conducts electricity with the electrical connector 22.

[0110] Exemplarily, as shown in Figure 8 , Figure 9 , the conductive contact surface 211a is provided with two nuts, and it can be understood that the nuts can cooperate with the bolts not shown to fix the electrical connector 22 and the connection terminal 21.

[0111] Exemplarily, in some embodiments not shown, the conductive contact surface 211a can be provided with a plurality of bolts, which can cooperate with the nuts to fix the electrical connector 22 and the connection terminal 21.

[0112] Exemplarily, in some embodiments not shown, the conductive contact surface 211a can be provided with threaded holes to cooperate with the bolts. The electrical connector 22 directly contacts the connection terminal 21.

[0113] Optionally, the conductive contact surface 211a can be a flat surface or a rough surface, and can be a plane or have a concave-convex structure, and the embodiments of the present application do not limit this.

[0114] Exemplarily, as shown in Figure 8 , Figure 9 , the connection terminal 21 has a certain thickness, and the conductive contact surface 211a can be the top surface of the connection terminal 21 in the first direction (Z).

[0115] Exemplarily, in embodiments not shown, the first end 211 of the connection terminal 21 can be bent, for example, bent in a direction perpendicular to the first direction (Z), and the bent part has the conductive contact surface 211a.

[0116] Optionally, the conductive contact surface 211a can be surface treated, for example, silver plated, gold plated, etc.

[0117] Exemplarily, the conductive contact surface 211a is provided with a plurality of nuts, and the nuts can be tightly fixed with the bolts not shown.

[0118] Exemplarily, the conductive contact surface 211a indirectly contacts the electrical connector 22 through the nuts.

[0119] Exemplarily, the conductive contact surface 211a can be provided with a welding ring 23A, and the nuts are arranged on the surface of the welding ring 23A, and the nuts are fixed with the connection terminal 21 through the welding ring 23A.

[0120] It can be understood that the welding ring 23A is a ring-shaped structure, which increases the contact area with the nut, stabilizes the bearing nut, and can conduct electricity.

[0121] Exemplarily, the material of the welding ring 23A can be the same as that of the connection terminal 21, for example, both are copper or copper alloy.

[0122] Exemplarily, the material of the welding ring 23A can be different from that of the connection terminal 21, for example, one of them is aluminum or aluminum alloy, and the other is copper or copper alloy.

[0123] Optionally, the welding ring 23A can be provided with threads inside to cooperate with the bolts, or can not be provided with threads.

[0124] Therefore, the assembly structure of the connection terminal 21, the electrical connector 22 and the battery monomer 10 can be optimized, and in the case that the electrical connector 22 has a tolerance or a warped edge, the plurality of bolts can stably lock the conductive contact surface 211a, so that the electrical connector 22 is flat, avoids the risk of connection failure caused by single-point loosening, and further improves the overcurrent area and connection reliability.

[0125] It can be understood that the above-mentioned warped edge refers to the edge lifting phenomenon of the electrical connector 22 due to processing or stress, and the plurality of bolts can overcome the influence of the tolerance and the warped edge by different locking forces, so that the electrical connector 22 is tightly attached to the conductive contact surface 211a.

[0126] In the embodiments of the present application, as shown in Figure 8 , Figure 9 The connection terminal 21 has a first end 211 and a second end 212 along a first direction (Z), the first end 211 has a conductive contact surface 211a, the connection assembly 20 includes a first connection terminal 21a and a second connection terminal 21b arranged at intervals along a second direction (X), the second direction (X) is perpendicular to the first direction (Z), and the first end 211 of the first connection terminal 21a is arranged in a recessed manner relative to the first end 211 of the second connection terminal 21b when viewed along the second direction (X).

[0127] It can be understood that the first connection terminal 21a and the second connection terminal 21b are two different connection terminals 21 in the connection assembly 20, and the interval along the second direction (X) means that there is a certain distance between them in the second direction (X).

[0128] Optionally, the shape and structure of the first connection terminal 21a can be the same as or different from that of the second connection terminal 21b.

[0129] Exemplarily, the first connection terminal 21a is a positive terminal, and the second connection terminal 21b is a negative terminal.

[0130] Exemplarily, the first connecting terminal 21a is a negative terminal, and the second connecting terminal 21b is a positive terminal.

[0131] Exemplarily, as shown in Figure 3 , the first connecting terminal 21a and the second connecting terminal 21b are arranged in a second direction (X) and are spaced apart from each other, and the second direction (X) is perpendicular to the first direction (Z).

[0132] It can be understood that the set-back arrangement means that the position of the outer contour of the first end 211 of the first connecting terminal 21a in the first direction (Z) is more inward than the position of the outer contour of the first end 211 of the second connecting terminal 21b.

[0133] Exemplarily, as shown in Figure 4 , Figure 5 , Figure 6 , the first end 211 of the first connecting terminal 21a is set back relative to the first end 211 of the second connecting terminal 21b when viewed in the second direction (X). The conductive contact surface 211a of the first connecting terminal 21a is also set back relative to the conductive contact surface 211a of the second connecting terminal 21b.

[0134] Exemplarily, the first connecting terminal 21a extends in the first direction (Z), and the second connecting terminal 21b extends in the first direction (Z).

[0135] Optionally, the length of the first connecting terminal 21a in the first direction (Z) can be the same as or different from the length of the second connecting terminal 21b.

[0136] Exemplarily, the length of the first connecting terminal 21a is less than the length of the second connecting terminal 21b, which is conducive to the set-back arrangement of the first end 211 of the first connecting terminal 21a relative to the second connecting terminal 21b and minimizes the space occupied by the two connecting terminals 21 in the first direction (Z).

[0137] Thus, the staggered arrangement of the two connecting terminals 21 in the first direction (Z) is achieved, which is conducive to forming physical isolation and improving insulation performance. Moreover, under the premise of meeting the electrical clearance and the creepage distance, the space occupied by the two connecting terminals 21 in the first direction (Z) is compressed, the space utilization of the connecting assembly 20 is improved, and the space utilization of the connecting assembly 20 is improved.

[0138] It can be understood that the electrical clearance refers to the shortest air distance between two conductive components, and the creepage distance refers to the shortest distance between two conductive components along the surface of the insulating material; the physical isolation is a spatial interval formed by the position staggering, which reduces the risk of accidental discharge between the two connecting terminals 21.

[0139] In the embodiments of the present application, the second end 212 of the first connecting terminal 21a is arranged in recess relative to the second end 212 of the second connecting terminal 21b as viewed along the second direction (X).

[0140] As shown in the drawings, Figure 4 , Figure 5 , Figure 6 the second end 212 of the first connecting terminal 21a is arranged in recess relative to the second end 212 of the second connecting terminal 21b as viewed along the second direction (X). That is, the position where the first connecting terminal 21a is connected to the battery cell 10 is also arranged in recess relative to the second connecting terminal 21b.

[0141] Thus, it is beneficial to further increase the electrical clearance and creepage distance between the first connecting terminal 21a and the second connecting terminal 21b, further compress the space occupation of the two connecting terminals 21 in the first direction (Z), and further reduce the space occupation of the entire connecting assembly 20.

[0142] Optionally, a partition plate can also be arranged between the first connecting terminal 21a and the second connecting terminal 21b along the second direction (X). The partition plate is made of insulating material, including but not limited to plastic, glass, resin, etc. An insulating isolation is formed between the two connecting terminals 21.

[0143] In the embodiments of the present application, the projection of the first connecting terminal 21a and the projection of the second connecting terminal 21b do not at least partially overlap as viewed along the second direction (X) to a projection plane perpendicular to the second direction (X).

[0144] As an example, the projection of the first connecting terminal 21a and the projection of the second connecting terminal 21b do not completely overlap as viewed along the second direction (X) to a projection plane perpendicular to the second direction (X). That is, the first connecting terminal 21a completely avoids the second connecting terminal 21b.

[0145] As another example, the projection of the first connecting terminal 21a and the projection of the second connecting terminal 21b partially overlap as viewed along the second direction (X) to a projection plane perpendicular to the second direction (X). That is, the first connecting terminal 21a partially avoids the second connecting terminal 21b.

[0146] As an example, as shown in the drawings, Figure 6 the complete non-overlapping of the above projections can be that the second end 212 of the first connecting terminal 21a and the second end 212 of the second connecting terminal 21b do not completely overlap, and the positions of the two in the third direction (Y) are different.

[0147] As another example, the partial non-overlapping of the projections of the two can be that the second end 212 of the first connecting terminal 21a and the second end 212 of the second connecting terminal 21b partially overlap, and the positions of the two in the third direction (Y) are different.

[0148] Thus, by the non-overlapping projection in the third direction (Y), the staggered arrangement of the second end 212 in the third direction (Y) is achieved, which is conducive to forming physical isolation, meeting the electrical clearance and creepage distance, and improving the insulation performance. Moreover, the staggered arrangement of the second end 212 in the third direction (Y) cooperates with the recess in the first direction (Z), so that the spatial optimization of the connecting terminal 21 is achieved from multiple dimensions, and the insulation effect is further enhanced.

[0149] In the embodiment of the present application, the plurality of threaded connections 23 are arranged along the third direction (Y), the second end 212 is recessed inward at one end along the third direction (Y) to form a recess 213, and the first direction (Z), the second direction (X) and the third direction (Y) are perpendicular to each other; along the third direction (Y), the first recess 213a of the first connecting terminal 21a is oppositely arranged with the second recess 213b of the second connecting terminal 21b.

[0150] Exemplarily, as shown in Figure 8 、 Figure 9 , the first connecting terminal 21a forms a first recess 213a at the second end 212 thereof, and the second connecting terminal 21b forms a second recess 213b at the second end 212 thereof. The embodiment of the present application does not limit the size of the first recess 213a and the second recess 213b.

[0151] It can be understood that the opposite arrangement of the first recess 213a and the second recess 213b means that the positions of the two in the third direction (Y) correspond. The design of the recess 213 enables the two connecting terminals 21 to be arranged in the second accommodating space S2 and to avoid each other through the recess 213, thereby avoiding structural interference, so that the connecting terminals 21 can be arranged more compactly, and the size of the shell 24 is reduced to a certain extent.

[0152] Exemplarily, as shown in Figure 4 、 Figure 6 、 Figure 7 、 Figure 10 、 Figure 11 , the connecting terminals 21 are arranged at intervals along the second direction (X) shown in the figure, each connecting terminal 21 has two nuts, and the two nuts are arranged along the third direction (Y) shown in the figure. The second direction (X) and the third direction (Y) are both perpendicular to the first direction (Z). It can be understood that the threaded connections 23 in the figure are nuts, and bolts can be installed at the positions of the nuts.

[0153] Since the first recessed portion 213a and the second recessed portion 213b are oppositely arranged, the first connecting terminal 21a and the second connecting terminal 21b are arranged staggered in the third direction (Y), the spacing between the connecting terminals 21 can be further compressed under the premise of meeting the electrical clearance and creepage distance, the space occupied by the connecting terminals 21 in the third direction (Y) is reduced, and the compactness and space utilization of the connecting terminals 21 as a whole are improved.

[0154] In the embodiment of the application, the connecting assembly 20 comprises a housing 24, the housing 24 defining a second accommodation space S2, the second accommodation space S2 accommodating at least part of the connecting terminals 21.

[0155] Exemplarily, as shown in Figure 3 the housing 24 accommodates at least part of the connecting terminals 21 and the electrical connecting piece 22.

[0156] It can be understood that the housing 24 is not closed, and a plurality of openings are provided to facilitate the electrical connecting piece 22 and the connecting terminals 21 to pass out.

[0157] Optionally, the housing 24 can be integrally formed or can be combined in a split structure. The shape of the housing 24 is not limited in the embodiment of the application.

[0158] Optionally, the housing 24 can be made of insulating material, such as plastic or the like.

[0159] Optionally, the housing 24 can be fixed on the battery device 100. The housing 24 can be fixed on one side of the battery device 100 along the first direction (Z), or can be fixed on one side along the second direction (X) or the third direction (Y), which is not limited in the embodiment of the application.

[0160] Optionally, the housing 24 can be fixed with the connecting terminals 21 to limit the movement and shaking thereof.

[0161] Exemplarily, the housing 24 and the connecting terminals 21 can be fixed to fix the position of the connecting terminals 21 by means of bolts, clamping, or the like.

[0162] Therefore, the housing 24 provides physical protection and insulation, improves safety, and delays the aging of the connecting terminals 21 and the bolts.

[0163] In the embodiment of the application, the battery device 100 comprises a busbar, the busbar being arranged in the first accommodation space S1, and the plurality of battery monomers 10 are electrically connected to the second end 212 through the busbar.

[0164] It can be understood that in some embodiments not shown, the busbar is an electrically conductive component for collecting the currents of the plurality of battery monomers 10, and the plurality of battery monomers 10 are connected to the connection terminal 21 through the busbar, avoiding the need for each battery monomer 10 to be connected to the connection terminal 21 by a separate wire, reducing the number and degree of clutter of the wires, and making the structure inside the box 101 more neat.

[0165] Exemplarily, the busbar can be a busbar, a bus plate, etc., and the material thereof is usually a metal with good electrical conductivity.

[0166] Exemplarily, the plurality of battery monomers 10 can be electrically connected to the connection assembly 20 through wires, busbars, etc. Thus, the busbar integrates the currents of the plurality of battery monomers 10, simplifies the internal electrical connection structure of the box 101, and saves the internal space of the box 101.

[0167] In the embodiments of the present application, the cross-sectional area of the connection terminal 21 is in the range of 90 to 300 mm 2 .

[0168] It can be understood that the cross-sectional area refers to the area of the cross section of the connection terminal 21 that can conduct electricity, and this range is determined according to the common current demand of the battery device 100.

[0169] Optionally, the cross section of the connection terminal 21 can be a plane perpendicular to the first direction (Z).

[0170] Optionally, the cross section of the connection terminal 21 can be a regular shape such as a circle, an ellipse, a triangle, a square, etc., or an irregular shape, and the embodiments of the present application do not limit this.

[0171] Optionally, the cross-sectional area of the copper bar is in the range of 90-150 square millimeters.

[0172] Exemplarily, the cross-sectional area of the copper bar can be 90 square millimeters, 95 square millimeters, 100 square millimeters, 105 square millimeters, 110 square millimeters, 115 square millimeters, 120 square millimeters, 125 square millimeters, 130 square millimeters, 135 square millimeters, 140 square millimeters, 145 square millimeters, 150 square millimeters, etc., and other verticals are not listed.

[0173] Optionally, the cross-sectional area of the aluminum bar is in the range of 150-300 square millimeters.

[0174] Exemplarily, the current-carrying cross-sectional area of the aluminum row can be 150 mm2, 155 mm2, 160 mm2, 165 mm2, 170 mm2, 175 mm2, 180 mm2, 185 mm2, 190 mm2, 195 mm2, 200 mm2, 205 mm2, 210 mm2, 215 mm2, 220 mm2, 225 mm2, 230 mm2, 235 mm2, 240 mm2, 245 mm2, 250 mm2, 255 mm2, 260 mm2, 265 mm2, 270 mm2, 275 mm2, 280 mm2, 285 mm2, 290 mm2, 295 mm2, 300 mm2, and the like, and other values are not listed.

[0175] Since the current-carrying cross-sectional area of the connecting terminal 21 is in a suitable range, the connecting terminal 21 can adapt to the current demand of the battery device 100 of different electric quantities, evenly distribute the current, avoid local overheating and aging, and also take into account the reliability of electrical connection and space utilization.

[0176] The second aspect of the embodiment of the application provides a power consumption device. In the embodiment of the application, the power consumption device includes a plurality of battery devices 100 of the first aspect of the embodiment of the application and an electrical connector 22, the electrical connector 22 is connected to the connecting terminal 21 through a plurality of threaded connectors 23, and the battery device 100 is used for storing or providing electric energy.

[0177] Exemplarily, the power consumption device can be a vehicle 1000. The vehicle 1000 is internally provided with the battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0178] It can be understood that the connecting assembly 20 can realize the electrical connection between the battery device 100 and the vehicle 1000.

[0179] It can be understood that the power consumption device side is provided with a bolt or a nut, which cooperates with the threaded connector 23 to be fixed.

[0180] Exemplarily, one end of the electrical connector 22 is connected to the connecting assembly 20, and the other end is connected to an interface at the vehicle body end of the vehicle 1000, for example, to realize electrical connection with the motor controller 200, a high-voltage distribution box, a charging interface, and the like.

[0181] Therefore, the reliability of the electric device can be improved. The risk of power supply interruption and excessive heating caused by poor contact under the condition that the electric device is subjected to vibration impact is reduced, and the battery device 100 can continue to supply power.

[0182] In the embodiment of the present application, the electric device includes a plug 241 configured to accommodate at least part of the electric connection piece 22, the connection assembly 20 includes a socket 242, the plug 241 is connected with the socket 242 in a plug-in manner, the socket 242 is fixedly connected with the box body 101, and the socket 242 is configured to accommodate at least part of the connection terminal 21.

[0183] Optionally, the plug 241 and the socket 242 can be connected in a plug-in manner through the sliding fit of the groove and the protrusion.

[0184] Exemplarily, as shown in Figure 3 、 Figure 4 、 Figure 10 、 Figure 11 , the connector includes the plug 241 and the socket 242 arranged separately, which reduces the difficulty of forming the connector, and the plug 241 is located outside the battery device 100, one end of the socket 242 is located inside the battery device 100, and the other end is located outside the battery device 100. The connection positions of the plug 241 and the socket 242 can be located outside the battery device 100, the plug 241 and the socket 242 can be installed or disassembled without disassembling the battery device 100, the complexity of installation or disassembly is reduced, compared with the integrated conductive piece, the vibration resistance of the connector is also improved through the connection mode of the plug 241 and the socket 242, and the stability of the conductive connection of the connector is improved.

[0185] It can be understood that the shapes and sizes of the plug 241 and the socket 242 can be designed according to specific application scenarios, and the embodiments of the present application do not limit this.

[0186] Optionally, the socket 242 can be stably combined with the box body 101 through bolts, buckles or the like.

[0187] Therefore, the plug 241 and the socket 242 are designed separately, which simplifies the disassembly process of the shell 24, supports modular quick disassembly, improves the overall assembly efficiency and structural reliability, and facilitates the installation and later maintenance of the connection assembly 20. The stability of the connection terminal 21 is enhanced by the fixation of the socket 242 and the box body 101. When the connection assembly 20 needs to be overhauled or replaced, the plug 241 and the socket 242 only need to be separated, without the need to disassemble the entire shell 24, which greatly improves the convenience of maintenance. The fixation of the socket 242 and the box body 101 makes the position of the connection terminal 21 more stable, and reduces the displacement caused by vibration and other factors.

[0188] Optionally, the socket 242 can also be provided with low-voltage terminals, wires, and the like transmission members.

[0189] It can be understood that the low-voltage terminal refers to a metal conductor capable of passing low-voltage current, and the material of the low-voltage terminal can be but is not limited to copper. The low-voltage terminal can cooperate with the connection terminal 21 to form a high-voltage interlock, and the low-voltage terminal can be but is not limited to used for transmitting a low-voltage signal.

[0190] Exemplarily, the length of the low-voltage terminal in the first direction (Z) is shorter than that of the first connection terminal 21a. When the plug 241 is plugged into the socket 242, the connection terminal 21 is connected first, and then the low-voltage terminal is connected; when the connection is disconnected, the low-voltage terminal is disconnected first, and then the connection terminal 21 is disconnected.

[0191] Exemplarily, the low-voltage terminal can transmit a low-voltage signal through a wire.

[0192] The specific scheme of the embodiment of the present application will be described below in conjunction with the drawings.

[0193] In the related art, the electrical connection contact interface of the connection assembly 20 is connected only by a single bolt. Due to the increasing charging rate, the charging current is also increasing synchronously. When there is a size deviation in the connection terminal 21 or the connection terminal 21 is stressed, the bolt strength is insufficient to support the stability of the electrical connection contact interface.

[0194] The embodiment provides a connection assembly 20 arranged on a battery device 100. In a specific embodiment, a box body 101 defines a first accommodating space S1, and a plurality of battery monomers 10 are arranged in the first accommodating space S1. The connection assembly 20 is arranged on the box body 101, and the connection assembly 20 includes at least one connection terminal 21 and an electrical connection member 22. The connection terminal 21 has a plurality of bolts. In the first direction (Z), the electrical connection member 22 of the vehicle 1000 is connected to one end of the connection terminal 21 through the plurality of bolts, and the other end of the connection terminal 21 is electrically connected to the battery monomer 10.

[0195] In a specific embodiment, the connection terminal 21 has a first end 211 and a second end 212 in the first direction (Z), and the first end 211 has a conductive contact surface 211a. The connection assembly 20 includes a first connection terminal 21a and a second connection terminal 21b arranged at intervals in a second direction (X), and the second direction (X) is perpendicular to the first direction (Z). In the second direction (X), the first end 211 of the first connection terminal 21a is arranged in a recess relative to the first end 211 of the second connection terminal 21b. The second end 212 of the first connection terminal 21a is arranged in a recess relative to the second end 212 of the second connection terminal 21b.

[0196] In a specific embodiment, the projection of the first connecting terminal 21a and the projection of the second connecting terminal 21b do not at least partially overlap when projected along the second direction (X) onto a projection plane perpendicular to the second direction (X).

[0197] In application, the plug 241 is partially assembled by inserting the electrical connecting piece 22 into the plug 241; the socket 242 is partially assembled by locking the socket 242 to the battery box 101, and then locking the busbar and the second end 212 of the connecting terminal 21 by bolts; finally, the plug 241 is inserted into the socket 242, and both connecting terminals 21 are assembled with the electrical connecting piece 22 by double bolts, thereby realizing high reliability and high current high-voltage connection.

[0198] The conductive contact surface 211a in the connecting assembly 20 is designed as a single-pole double-bolt locking form, and the busbar connection form is designed as a double-bolt locking form, thereby improving the connection reliability; meanwhile, the two connecting terminals 21 are designed to be staggered in two directions, thereby reducing the space occupation of the connecting assembly 20 and improving the space utilization of the connecting assembly 20 while meeting the electrical clearance and creepage distance.

[0199] If not particularly specified, all the embodiments and optional embodiments of the present application can be combined to form new technical solutions.

[0200] If not particularly specified, all the technical features and optional technical features of the present application can be combined to form new technical solutions.

[0201] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; 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 be covered in the scope of protection claimed by the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of protection claimed.

Claims

1. A battery device, characterized by, The battery device comprises a box body, a plurality of battery cells and a connecting assembly, The box body defines a first accommodating space, and the plurality of battery cells are arranged in the first accommodating space; The connecting assembly is arranged in the box body, and the connecting assembly comprises at least one connecting terminal, one end of the connecting terminal is provided with a plurality of threaded connectors in a first direction, the threaded connectors are used for being connected with a power utilization device side, and the other end of the connecting terminal is electrically connected with the battery cells.

2. The battery device according to claim 1, characterized by The threaded connectors are bolts or nuts, one end of the connecting terminal in the first direction is provided with a conductive contact surface, and the conductive contact surface is provided with the plurality of threaded connectors.

3. The battery device of claim 2, wherein, The connecting terminal has a first end and a second end in a first direction, the first end is provided with the conductive contact surface, the connecting assembly comprises a first connecting terminal and a second connecting terminal arranged in a second direction, the second direction is perpendicular to the first direction, and the first end of the first connecting terminal is arranged in recess relative to the first end of the second connecting terminal in the second direction.

4. The battery device of claim 3, wherein The second end of the first connecting terminal is arranged in recess relative to the second end of the second connecting terminal in the second direction.

5. The battery device of claim 4, wherein, The projection of the first connecting terminal and the projection of the second connecting terminal at least partially do not overlap in a projection plane perpendicular to the second direction in the second direction.

6. The battery device of claim 4, wherein The plurality of threaded connectors are arranged in a third direction, one end of the second end in the third direction is recessed to form a recessed portion, the first direction, the second direction and the third direction are perpendicular to each other. The first recessed portion of the first connecting terminal and the second recessed portion of the second connecting terminal are arranged opposite to each other in the third direction.

7. The battery device according to any one of claims 1 to 6, characterized by, The connecting assembly comprises a shell, the shell defines a second accommodating space, and the second accommodating space accommodates at least part of the connecting terminal.

8. The battery device according to any one of claims 3 to 6, characterized by, The battery device comprises a busbar arranged in the first accommodating space, and the plurality of battery cells are electrically connected with the second end through the busbar.

9. The battery device according to any one of claims 1 to 6, characterized by, The cross-sectional area of the current-carrying terminal is in the range of 90 mm 2 to 300 mm 2 .

10. An electrical device, characterized by The battery device comprises a plurality of battery devices and an electrical connector, the electrical connector is connected with the connecting terminal through the plurality of threaded connectors, and the battery device is used for storing or providing electric energy.

11. The powered device of claim 10, wherein, The power utilization device comprises a plug, and the plug is configured to accommodate at least part of the electrical connector; The connecting assembly comprises a socket, the socket is configured to accommodate at least part of the connecting terminal, the plug and the socket are connected in plug-in connection, and the socket is fixedly connected with the box body.

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