Battery device, electric equipment and energy storage device

Abstract

The utility model provides a battery device, electric equipment and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a battery box, a high-voltage element, an adapter, a first bus bar and a second bus bar, the adapter comprises two protection parts which are oppositely arranged in the first direction and are connected, and at least one protection part comprises a conductive part; the first bus bar is provided with a connecting end, the second bus bar is provided with a first end and a second end, the connecting end and the first end extend in the direction perpendicular to the first direction and are located between the two protection parts, at least one of the connecting end and the first end is clamped between the two protection parts, and the connecting end and the first end are electrically connected through a conductive piece. The second end is connected with the high-voltage element; the first direction is parallel to the thickness direction of the connecting end and the first end. By adopting the scheme, the phenomenon that the adapter is locally overheated after the battery device is vibrated or impacted can be reduced, so that the degree of damage to an electrical system caused by local overheating can be reduced.

Description

TECHNICAL FIELD

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

[0002] Energy saving and emission reduction are the key to the sustainable development of society. Batteries are widely used in various electric devices or energy storage systems due to their characteristics of storing or releasing energy as needed, and are an important part of promoting energy transformation and sustainable development. For the new energy industry, battery technology is an important factor for its development.

[0003] In order to realize power transmission, the battery is generally provided with a power distribution box and an electrical connection terminal, the power distribution box and the electrical connection terminal are electrically connected, and the electrical connection terminal is used as a power transmission interface. Due to the limitation of the space layout in the battery box, a plurality of bus bars connected in sequence are often used to realize the electrical connection of the power distribution box and the electrical connection terminal, and two bus bars are electrically connected through an adapter. However, the current adapter is prone to local overheating after the battery is vibrated or impacted, which causes safety hazards. UTILITY MODEL CONTENT

[0004] The present application aims to at least solve one of the technical problems in the background art. Therefore, one object of the present application is to provide a battery device, an electric device and an energy storage device, so as to reduce the phenomenon of local overheating at the adapter after the battery is vibrated or impacted, and reduce the degree of harm to the electrical system caused by local overheating at the adapter.

[0005] Embodiments of the first aspect of the present application provide a battery device, comprising: a battery box, a high-voltage element, an adapter, a first bus bar and a second bus bar, the high-voltage element being arranged in the battery box; the adapter is accommodated in the battery box, the adapter comprises two protective parts arranged opposite to each other and connected along a first direction, at least one of the two protective parts comprises a conductive part; the first bus bar and the second bus bar are both accommodated in the battery box; the first bus bar has a connection end, the second bus bar has a first end and a second end, the connection end and the first end both extend along a direction perpendicular to the first direction and are both located between the two protective parts, at least one of the connection end and the first end is clamped between the two protective parts, and the connection end and the first end are electrically connected through the conductive part, the second end is connected with the high-voltage element; wherein the first direction is parallel to the thickness direction of the connection end and the first end.

[0006] In the technical scheme of the embodiment of the application, the adapter is provided with two protection parts oppositely arranged and connected along the first direction, at least one of the protection parts comprises a conductive part, and the connecting end and the first end are electrically connected through the conductive part, so that the first bus bar and the second bus bar are electrically connected through the adapter. Moreover, the connecting end and / or the first end are clamped between the two protection parts to be fixed, so that the phenomenon of local overheating at the bolt connection caused by vibration or impact can be reduced, thereby facilitating reduction of the degree of harm to the electrical system of the battery device caused by local overheating.

[0007] In some embodiments, each of the two protection parts comprises a conductive part, the two conductive parts are respectively a first conductive part and a second conductive part; the first conductive part is electrically connected with the second conductive part, and the connecting end and the first end are in conductive contact with at least one of the first conductive part and the second conductive part.

[0008] In some embodiments, the first conductive part and the second conductive part are oppositely and spacedly arranged along the first direction; and at least one of the first end and the connecting end is clamped between the first conductive part and the second conductive part.

[0009] In some embodiments, the thickness of the connecting end is smaller than the thickness of the first end; a surface of the first conductive part facing the second conductive part is a first surface, a surface of the second conductive part facing the first conductive part is a second surface, two surfaces of the connecting end opposite along the thickness direction thereof are respectively attached to the first surface and the second surface; the second surface is provided with a groove, the groove penetrates the surface of the second conductive part along the extension direction of the first end and forms a first opening, and the first end extends into the groove through the first opening.

[0010] In some embodiments, the first conductive part is projected on the second surface to cover the groove, and two surfaces of the connecting end opposite along the thickness direction thereof are respectively attached to the first surface and a surface of the groove facing the first conductive part.

[0011] In some embodiments, the first conductive part is projected on the second surface and does not coincide with the groove, the first end is connected with the second conductive part through a fixing connector, one end of the fixing connector protrudes from a side of the first end away from the second conductive part and is located at a side of the first conductive part facing the groove, and the fixing connector is located between the two protection parts.

[0012] In some embodiments, the first end is matched with the groove.

[0013] In some embodiments, each of the two protection parts comprises a protection shell, the two protection shells are oppositely arranged and connected along the first direction, and the two protection parts are spacedly arranged along the first direction.

[0014] In some embodiments, the extension direction of the connecting end is the second direction, the extension direction of the first end is the third direction; the two protective shells are a first protective shell and a second protective shell, the surface of the first protective shell facing the second protective shell and / or the surface of the second protective shell facing the first protective shell is provided with a first limiting groove and a second limiting groove, the first limiting groove extends along the second direction and penetrates through the outer surface of the adapter, and the second limiting groove extends along the third direction and penetrates through the outer surface of the adapter; part of the connecting end is located in the first limiting groove, and the first limiting groove is used to limit the displacement of the connecting end along a direction perpendicular to the first direction and the second direction; part of the first end is located in the second limiting groove, and the second limiting groove is used to limit the displacement of the first end along a direction perpendicular to the first direction and the third direction.

[0015] In some embodiments, each of the two protective parts includes a conductive piece, and the two conductive pieces are electrically connected; the outer surface of part of the connecting end is covered with a first insulating layer and accommodated in the first limiting groove, and the remaining part is stacked with the at least one conductive piece along the first direction; the outer surface of part of the first end is covered with a second insulating layer and accommodated in the second limiting groove, and the remaining part is stacked with the at least one conductive piece along the first direction.

[0016] In some embodiments, the adapter is configured such that the part of the connecting end without the first insulating layer and the part of the first end without the second insulating layer are clamped between the two conductive pieces, and the part of the connecting end with the first insulating layer and the part of the first end with the second insulating layer are located between the two protective shells.

[0017] In some embodiments, the two protective parts are configured to satisfy one of the following structures:

[0018] The surface of the protective shell is provided with a mounting groove, the conductive piece is accommodated in the mounting groove, and the dimension of the conductive piece along the first direction is a first dimension, the dimension of the mounting groove along the first direction is a second dimension, and the difference between the first dimension and the second dimension is not less than the thickness of the first insulating layer and the thickness of the second insulating layer;

[0019] The surface of the protective shell is provided with a mounting groove, a first limiting groove and a second limiting groove, the dimension of the conductive piece along the first direction is a first dimension, the dimension of the mounting groove along the first direction is a second dimension, the first dimension is equal to the second dimension, the minimum distance between the connecting end and the first limiting groove along the first direction is not less than the thickness of the first insulating layer, and the minimum distance between the first end and the second limiting groove along the first direction is not less than the thickness of the second insulating layer;

[0020] The conductive piece is protrudingly arranged on the surface of the protective shell, the dimension of the conductive piece along the first direction is a first dimension, and the first dimension is not less than the thickness of the first insulating layer and the thickness of the second insulating layer.

[0021] The embodiments of the second aspect of the present application provide a power utilization device, which comprises the battery device in the above embodiments, and the battery device is used to provide electric energy.

[0022] The embodiments of the third aspect of the present application provide an energy storage device, which comprises the battery device in the above embodiments, and the battery device is capable of storing electric energy.

[0023] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the following specific embodiments of the present application are implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0024] In the drawings, like reference numerals refer to same or similar components throughout the several views. These drawings are not necessarily to scale. It should be understood that these drawings only depict some embodiments in accordance with the present disclosure and should not be considered as limiting the scope of the present application.

[0025] Figure 1 Structure diagram of a vehicle for some embodiments of the present application;

[0026] Figure 2 Exploded structure diagram of a battery device for some embodiments of the present application;

[0027] Figure 3 Structure diagram of a battery device without a cover for some embodiments of the present application;

[0028] Figure 4 Structure diagram of a battery device for Figure 3 Enlarged diagram of a part A in FIG. 6;

[0029] Figure 5 Structure diagram of a battery device for Figure 3 Enlarged diagram of a part B in FIG. 6;

[0030] Figure 6 Switching diagram of a first bus bar and a second bus bar in a battery device for some embodiments of the present application;

[0031] Figure 7 Structure diagram of a switch for some embodiments of the present application;

[0032] Figure 8 Structure diagram of a switch for Figure 7 Exploded diagram of the switch shown in FIG. 8;

[0033] Figure 9 Structure diagram of a switch for some other embodiments of the present application;

[0034] Figure 10 andFigure 11 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application;

[0035] Figure 12 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application; Figure 9 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application;

[0036] Figure 13 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application;

[0037] Figure 14 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application;

[0038] Figure 15 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application; Figure 12 A cross-sectional view of the adapter and the first bus bar and the second bus bar according to some embodiments of the present application;

[0039] Explanation of reference signs:

[0040] Vehicle 1000;

[0041] Battery device 100, controller 200, motor 300;

[0042] Battery cell assembly 10, battery cell 11;

[0043] Battery box 20, box body 21, containing bin 210, expansion beam 211, box cover 22;

[0044] First bus bar 30, connecting end 31, electrically connecting section 32, first insulating layer 33;

[0045] Adapter 40, slit 410, electrically conductive member 411, first electrically conductive member 411a, second electrically conductive member 411b, second surface 4110, groove 4111, protective shell 412, first protective shell 412a, second protective shell 412b, mounting groove 4120, first limiting groove 413, bolt 414, base 415, second limiting groove 416, second bus bar 42, first end 420, second insulating layer 421, fixed connecting member 43;

[0046] High-voltage element 50, distribution box 51, electrically connecting terminal 52. DETAILED DESCRIPTION

[0047] The embodiments of the technical solutions of the present application will be described in detail below in conjunction with 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.

[0048] 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 this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a reference to the plural and vice versa.

[0049] 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 "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0050] 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 is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] 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 that the front and rear associated objects are a "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. The orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0054] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements.

[0055] The term "parallel" in the present application not only includes the case of absolute parallel, but also includes the case of approximate parallel which is generally recognized in engineering; at the same time, "vertical" also not only includes the case of absolute vertical, but also includes the case of approximate vertical which is generally recognized in engineering. 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 situation.

[0056] If not specifically stated, "including" and "containing" mentioned in the present application means open or closed. For example, "including" and "containing" can mean that other components not listed can also be included or contained, or only the listed components can be included or contained.

[0057] If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0058] At present, from the development of market situation, the application of rechargeable batteries is more and more widely. Rechargeable 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 various electronic devices, such as electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and many other fields. With the continuous expansion of the application field of rechargeable batteries, the market demand is also increasing.

[0059] Generally, the battery is provided with a distribution box and an electrical connection terminal, the distribution box is electrically connected with the battery monomer, and the distribution box is connected with the electrical connection terminal, the electrical connection terminal is used to connect with the load, so as to transmit the electrical energy of the battery monomer to the load. Of course, the electrical connection terminal can also be used to connect with the charging device to realize charging.

[0060] Due to the limitation of the space layout in the battery box (for example, the electrical connection terminal and the distribution box are respectively located on both sides of the battery compartment accommodating the battery monomer), when a single bus bar is used to connect the electrical connection terminal and the distribution box, it may cause assembly interference, layout difficulty and other problems. Therefore, at present, a plurality of bus bars connected in sequence are usually used to realize the electrical connection between the distribution box and the electrical connection terminal, and the two bus bars are electrically connected through an adapter.

[0061] In the related art, the adapter includes a box body and a box cover, the box body and the box cover are covered with each other and surround a cavity, a metal plate is arranged in the cavity, two adapter interfaces are arranged on the box cover, one end of one bus bar extends into the cavity through one adapter interface, is stacked on the metal plate and is screwed with the metal plate through a bolt, one end of the other bus bar extends into the cavity through the other adapter interface, is stacked on the metal plate and is screwed with the metal plate through a bolt, so that the two bus bars are connected in conduction through the metal plate. It can be understood that in such an adapter mode, the current will pass through the bolt. The battery is applied to a vehicle, the vehicle will experience a large number of vibrations or impacts throughout its life cycle, and then the bolt is prone to vibration wear, resulting in increased resistance at the screwing position and local overheating, which in turn is prone to trigger a chain reaction (for example, the protective cover used for insulation protection outside the bolt is high-temperature melting), and safety hazards are caused.

[0062] Based on the above considerations, a battery device is designed, the adapter includes two protection parts arranged opposite to each other and connected in a first direction, at least one protection part includes a conductive part, at least one of the connection end of the first bus bar and the first end of the second bus bar is clamped between the two protection parts and electrically connected through the conductive part, and the second end of the second bus bar is connected with a high-voltage element (a distribution box or an electrical connection terminal).

[0063] In such a battery device, the connection end and / or the first end are not fixed by a bolt, but are clamped between the two protection parts, so that the local overheating of the adapter can be reduced, and the degree of harm to the electrical system caused by local overheating can be reduced.

[0064] The battery device provided in the embodiments of the present application can be used in, but is not limited to, an electrical equipment or an energy storage device for a vehicle, a ship or an aircraft. The power supply system of the electrical equipment or the energy storage device can be composed of the battery device provided in the embodiments of the present application.

[0065] The energy storage device using the battery device as a power supply system in the embodiments of the present application can be used in an energy storage power station, a wind power generation system, a solar power generation system, a mobile power system or a temporary power supply system. The energy storage device can store electrical energy as needed and output the electrical energy at an appropriate time. For example, the energy storage device can store electrical energy when the electricity consumption is low, and provide electrical energy for related users or electrical equipment when the electricity consumption is high. The energy storage device provided in the embodiments of the present application can be any power system that needs to use an energy storage device.

[0066] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack or a portable energy storage system.

[0067] In some embodiments, the energy storage device can include a cabinet and one or more battery clusters, the battery clusters being housed in the cabinet. The battery cluster can include a plurality of battery devices connected in series by a busbar to increase the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0068] The power consuming device using the battery device as a power source in the embodiments of the present application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0069] It should be understood that the technical solutions described in the embodiments of the present application are not only limited to the battery device and the power consuming device described above, but can also be applied to all battery devices including a cabinet and power consuming devices using the battery device. However, for the sake of brevity of description, the following embodiments are described by taking an electric vehicle as an example.

[0070] Figure 1 A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. Please refer to Figure 1 The vehicle 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended range car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0071] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0072] Figure 2 A structural schematic diagram of the battery device 100 of an embodiment of the present application is shown. Please refer to Figure 2The battery apparatus 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 can include a plurality of battery cells 11 connected in series, in parallel, or in a mixed connection through a busbar component.

[0073] In some embodiments, the battery cell assembly 10 is generally formed by arranging a plurality of battery cells 11.

[0074] As an example, the battery cell assembly 10 can be a battery module formed by arranging and fixing a plurality of battery cells 11 into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells 11 with a cable tie.

[0075] In some embodiments, referring to Figure 2 , the battery apparatus 100 can be a battery pack including a battery box 20 and one or more battery cell assemblies 10 accommodated in the battery box 20. The battery box 20 can be a simple cuboid or a cylinder or a sphere, or a complex cuboid or a cylinder or a sphere formed by combining simple cuboids or cylinders or spheres. The material of the battery box 20 can be an alloy material such as an aluminum alloy or an iron alloy, a high polymer material such as a polycarbonate or a polyisocyanurate foam plastic, or a composite material such as a glass fiber and epoxy resin.

[0076] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be accommodated in the battery box 20 by fixing the battery module in the battery box 20.

[0077] As an example, the battery cell assembly 10 can also be accommodated in the battery box 20 by directly fixing a plurality of battery cells 11 in the battery box 20.

[0078] As an example, the battery box 20 can include a box body 21 and a box cover 22. The box body 21 is open on one side to form an opening, and the box body 21 and the box cover 22 are buckled to form a closed space inside the battery box 20 to accommodate the battery cell assembly 10. Here, closed means covered or closed, which can be non-sealed or sealed to avoid the influence of liquid or other foreign matters on the charging or discharging of the battery cells 11. The box body 21 can be a top cover or a bottom plate.

[0079] As an example, the battery box 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the battery box 20 to accommodate the battery cell assembly 10.

[0080] In some embodiments, the battery box 20 can be part of the chassis structure of a vehicle. For example, part of the battery box 20 can form at least part of the floor of the vehicle, or part of the battery box 20 can form at least part of the cross beams and longitudinal beams of the vehicle.

[0081] The battery cell 11 provided in the embodiments of the present application can be a secondary battery, which refers to a battery cell 11 that can be activated by charging after discharging to continue to be used.

[0082] The battery cell 11 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-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, and the multi-prismatic battery cell is, for example, a hexagonal-prismatic battery cell, etc., and the present application has no special limitation.

[0083] Please refer to Figures 3 to 6 , the battery device 100 further includes a high-voltage component 50, and an adapter 40, a first bus bar 30, and a second bus bar 42 accommodated in the battery box 20. The high-voltage component 50 is provided in the battery box 20. The adapter 40 includes two protective parts oppositely arranged and connected along a first direction, and at least one of the two protective parts includes a conductive member 411. The first bus bar 30 has a connection end, the second bus bar 42 has a first end and a second end. The connection end and the first end both extend in a direction perpendicular to the first direction and are both located between the two protective parts. At least one of the connection end and the first end is clamped between the two protective parts, and the connection end and the first end are electrically connected through the conductive member 411. The second end is connected to the high-voltage component 50. Wherein, the first direction is parallel to the thickness direction of the connection end and the first end.

[0084] The high-voltage component 50 is an electronic or electrical component operating at a high voltage. There can be multiple high-voltage components 50, Figure 3The at least one high-voltage component 50 is a distribution box 51, which is a power device for realizing connection and power distribution of the battery monomer assembly 10 and the load, and is accommodated in the battery box 20 and electrically connected with the battery monomer assembly 10. The at least one high-voltage component 50 is an electrical connection terminal 52, which is an electrical connection device for transmitting electric energy or signals, and can be arranged on the side wall of the box body 21 and connected with the load, and can be, for example, a high-voltage connector.

[0085] The first busbar 30 and the second busbar 42 are components for transmitting electric energy. The connection end of the first busbar 30 refers to one end of the first busbar 30 along the extension direction thereof, and the two ends of the second busbar 42 along the extension direction thereof are respectively a first end and a second end.

[0086] The adapter 40 is a connecting component for realizing electrical connection between the first busbar 30 and the second busbar 42. The two protection portions are arranged in opposite directions parallel to the thickness direction of the first end and the connection end, the connection end and the first end extend into the space between the two protection portions, and at least one of the connection end and the first end is clamped by the two protection portions. It can be understood that the connection end is clamped by the two protection portions, or the first end is clamped by the two protection portions, or the connection end and the first end are clamped between the two protection portions. The connection end and the first end are clamped between the two protection portions, which means that the connection end and the first end are clamped independently by the two protection portions, and the connection end and the first end are not arranged in the first direction.

[0087] At least one of the two protection portions includes a conductive piece 411. It can be understood that one of the two protection portions includes the conductive piece 411, that is, the adapter 40 has one conductive piece 411, and the first busbar 30 and the second busbar 42 are electrically connected through the one conductive piece 411. It can also be understood that both of the two protection portions include the conductive piece 411, that is, the adapter 40 has two conductive pieces 411, and the first busbar 30 and the second busbar 42 are electrically connected through the two conductive pieces 411. The conductive piece 411 is a component for conducting electric current, and the material of the conductive piece 411 can include at least one of aluminum, copper, conductive ceramics and other conductive materials. The material of the conductive piece 411 can be any one of metal conductive material, non-metal conductive material and composite conductive material.

[0088] The battery device 100 of the embodiment includes two protection parts oppositely arranged and connected in the first direction, at least one of the protection parts includes the conductive part 411, and the connecting end and the first end are electrically connected through the conductive part 411, so that the first busbar 30 and the second busbar 42 are electrically connected through the adapter 40. In addition, at least one of the connecting end and the first end is clamped between the two protection parts to achieve fixation, so that the connecting end and / or the first end clamped between the two protection parts are not fixed by bolts, thereby reducing the phenomenon of local overheating of the bolt connection caused by vibration or impact of the battery device 100, thereby facilitating the reduction of the degree of harm to the electrical system of the battery device 100 caused by local overheating.

[0089] In some embodiments, the battery device 100 further includes two expansion beams 211 accommodated in the box 21 and arranged in the thickness direction of the battery cell 11 (X direction shown in the figure). Figure 3 The two expansion beams 211 divide the space in the box 21 into a battery compartment and two accommodation compartments 210, the battery compartment is located between the two accommodation compartments 210, and the battery cell assembly 10 is accommodated in the battery compartment. One of the accommodation compartments 210 contains a power distribution box 51, and the box 21 is provided with an electrical connection terminal 52 on the side wall, and the electrical connection terminal 52 is located on the side of the battery cell assembly 10 away from the power distribution box 51. Among them, the thickness direction of the battery cell 11 is also the maximum expansion direction of the battery cell 11.

[0090] In addition, in the embodiment, the first busbar 30 extends from one of the accommodation compartments 210 to the other accommodation compartment 210, the first busbar 30 has two connecting ends, the two connecting ends are located in different accommodation compartments 210, and the first busbar 30 and the adapter 40 are correspondingly provided with two, each accommodation compartment 210 contains one first busbar 30 and one adapter 40. Please refer to Figure 4 One of the connecting ends and the first end of one of the first busbars 30 are adapted through one of the adapters 40, and the second end of one of the first busbars 30 is connected with the power distribution box 51. Please refer to Figure 5 The other connecting end and the first end of the other first busbar 30 are adapted through the other adapter 40, and the second end of the other first busbar 30 is connected with the electrical connection terminal 52. In this way, the power distribution box 51 and the electrical connection terminal 52 are electrically connected, and the power distribution box 51 can distribute power to the load connected with the electrical connection terminal 52.

[0091] The relative arrangement direction of the two protection parts in one of the adapters 40 and the relative arrangement direction of the two protection parts in the other adapter 40 can be the same or different.

[0092] Furthermore, the relative orientation of the two protective sections of each adapter 40 is parallel to the minimum dimension direction of the receiving compartment 210 where the adapter 40 is located. The minimum dimension direction of the receiving compartment 210 refers to the direction of the receiving compartment 210 along the height of the housing 21 ( Figure 3 The dimensions shown are (in the Z direction), the dimensions of the receiving compartment 210 along the thickness direction of the battery cell, and the dimensions of the receiving compartment 210 along the length direction of the battery cell. Figure 3 The direction of the minimum value in the dimension (shown as the Y direction) is where the X, Y, and Z directions are perpendicular to each other.

[0093] Please combine Figure 3 and Figure 4 One of the receiving compartments 210 has its minimum dimension direction parallel to the height direction of the housing 21, and the two protective parts of the adapter 40 within this receiving compartment 210 are arranged opposite each other along the height direction of the housing 21. Please refer to... Figure 3 and Figure 5 The minimum dimension direction of another receiving compartment 210 is parallel to the thickness direction of the battery cell, and the two protective parts of the adapter 40 in the receiving compartment 210 are arranged opposite each other along the thickness direction of the battery cell.

[0094] In this embodiment, by aligning the relative orientation of the two protective parts of the adapter 40 with the minimum dimension direction of the receiving compartment 210 where the adapter 40 is located, the adapter 40 can be accommodated in the corresponding receiving compartment 210, and the minimum dimension of the receiving compartment 210 is as small as possible. Without changing the size of the battery box 20, a larger space inside the battery box 20 can be used to accommodate individual battery cells, which is beneficial for improving the volumetric energy density.

[0095] In some embodiments, the cross-sectional area of ​​the first busbar 30 is equal to the cross-sectional area of ​​the second busbar 42, and the thickness of the first busbar 30 is less than the thickness of the second busbar 42. See also... Figure 3 and Figure 6 The first busbar 30 is constructed in a "U" shape. The first busbar 30 has two connecting ends and an electrical connection segment 32 located between the two connecting ends. The electrical connection segment 32 is located on the side of the battery cell assembly 10 facing the opening of the housing 21 and presses against the battery cell assembly 10. The current-carrying cross-section at each point on the first busbar 30 refers to the cross-section perpendicular to its own extension direction at each point on the first busbar 30. For example, the current-carrying cross-section of the electrical connection segment 32 refers to the cross-section of the electrical connection segment 32 perpendicular to its own extension direction. The area of ​​the current-carrying cross-section of the electrical connection segment 32 is equal to the product of the thickness D of the electrical connection segment 32 and the width W of the electrical connection segment 32. The width of the electrical connection segment 32 is its dimension along its own width direction, and the width direction of the electrical connection segment 32 is perpendicular to both its thickness direction and its extension direction.

[0096] The flow passage cross section of the second bus bar 42 refers to a cross section perpendicular to the extending direction of the second bus bar 42. The thickness of the first bus bar 30 being smaller than the thickness of the second bus bar 42 means that the thickness of the first bus bar 30 is smaller than the thickness of the second bus bar 42 at each position, i.e., the maximum value of the thickness of the first bus bar 30 is smaller than the minimum value of the thickness of the second bus bar 42. The thickness of the first bus bar 30 can be equal at each position, or the thickness of the first bus bar 30 is not equal at at least two positions. Similarly, the thickness of the second bus bar 42 can be equal at each position, or the thickness of the second bus bar 42 is not equal at at least two positions.

[0097] Since the first bus bar 30 is partially located at the side of the battery cell assembly 10 facing the opening of the box 21, by making the thickness of the first bus bar 30 smaller than the thickness of the second bus bar 42, the space occupied by the first bus bar 30 in the height direction of the box 21 is reduced, which can help to compress the height of the battery box 20, so that the battery device 100 can be applied to scenarios with limited installation height.

[0098] It can be understood that, in the case where the thickness of the first bus bar 30 is smaller than the thickness of the second bus bar 42, if the width of the first bus bar 30 is equal to the width of the second bus bar 42, the flow passage cross section area of the first bus bar 30 is smaller than the flow passage cross section area of the second bus bar 42, resulting in that the heat of the first bus bar 30 is higher than the heat of the second bus bar 42. In the present embodiment, by making the flow passage cross section area of the first bus bar 30 equal to the flow passage cross section area of the second bus bar 42, the heat of the first bus bar 30 and the heat of the second bus bar 42 are more balanced.

[0099] The specific structure of the adapter 40 will be described in detail below.

[0100] Referring to Figures 7 to 9 , each of the two protection parts includes a protection shell 412, and the two protection shells 412 are opposite and connected along the first direction. Referring to Figures 7 to 9 , the adapter 40 further includes a base 415, the base 415 is connected with one of the protection shells 412, and the base 415 is further fixedly arranged in the box 21. For example, referring to Figure 7 and Figure 8 , the base 415 can have a cylindrical structure, and the base 415 can be fixedly arranged in the box 21 by welding, bonding or the like. For example, referring to Figure 9 , the base 415 can be fixedly arranged in the box 21 by bolts.

[0101] As described above, each of the two protection parts can include the conductive member 411, or one of the two protection parts includes the conductive member 411. The following will be described in detail taking an example that only one of the two protection parts includes the conductive member 411.

[0102] As an example, refer to Figure 10 In (A) and (B), one of the connecting end and the first end is stacked with the conductive piece 411 and electrically connected with the conductive piece 411, and is clamped by the conductive piece 411 of one guard part and the guard shell 412 of the other guard part; the other of the connecting end and the first end is not overlapped with the conductive piece 411 in the first direction and is electrically connected with the peripheral side surface of the conductive piece 411, and is clamped by the two guard shells 412.

[0103] As an example, refer to Figure 10 In (C), in the first direction, neither the connecting end nor the first end is overlapped with the conductive piece 411, and both the connecting end and the first end are electrically connected with the peripheral side surface of the conductive piece 411, and are clamped by the two guard shells 412.

[0104] The following is a detailed description taking an example that both the two guard parts include the conductive piece 411. According to some embodiments of the present application, each of the two guard parts includes the conductive piece 411, and the two conductive pieces 411 are respectively a first conductive piece 411a and a second conductive piece 411b, and the first conductive piece 411a is electrically connected with the second conductive piece 411b. The connecting end and the first end are electrically connected with at least one of the first conductive piece 411a and the second conductive piece 411b.

[0105] The first conductive piece 411a is arranged in one of the guard shells 412, and the second conductive piece 411b is arranged in the other of the guard shells 412. The positional relationship between the first conductive piece 411a and the second conductive piece 411b is various. For example, the first conductive piece 411a and the second conductive piece 411b can be oppositely arranged along the first direction, or the first conductive piece 411a and the second conductive piece 411b can be staggered, i.e., not opposite to each other.

[0106] The connecting end and the first end can be electrically connected with both the first conductive piece 411a and the second conductive piece 411b, or can be electrically connected with one of the first conductive piece 411a and the second conductive piece 411b. As an example, the connecting end is electrically connected with the first conductive piece 411a, and the first end is electrically connected with the second conductive piece 411b, so that the current can flow through the first bus bar 30, the first conductive piece 411a, the second conductive piece 411b and the second bus bar 42 in turn, and then flows to the high-voltage element 50, or the current can flow from the high-voltage element 50, and then flows through the second bus bar 42, the second conductive piece 411b, the first conductive piece 411a and the first bus bar 30 in turn.

[0107] According to the foregoing description, when each guard portion includes the conductive member 411, the first conductive member 411a and the second conductive member 411b can be arranged oppositely or not oppositely along the first direction. Hereinafter, the case where the first conductive member 411a and the second conductive member 411b are not arranged oppositely along the first direction is described in detail as an example.

[0108] As an example, refer to Figure 11 (A), the first conductive member 411a and the second conductive member 411b are arranged side by side and in conductive contact with each other along a direction perpendicular to the first direction, the connecting end can be located on one side of the first conductive member 411a along the first direction, that is, the connecting end is arranged in a stack along the first direction with the first conductive member 411a, at this time, the connecting end is clamped between the first conductive member 411a and one of the guard shells 412, and the first end is located on one side of the second conductive member 411b along the first direction, that is, the first end is arranged in a stack along the first direction with the second conductive member 411b, at this time, the first end is clamped between the second conductive member 411b and one of the guard shells 412.

[0109] As an example, refer to Figure 11 (B), the first end is clamped by the two guard shells 412 and in conductive contact with the peripheral surface of one of the conductive members 411, and the connecting end is clamped by the conductive member 411 of one of the guard portions and the guard shell 412 of the other guard portion.

[0110] As an example, refer to Figure 11 (C), the first conductive member 411a and the second conductive member 411b are both located between the two guard shells 412, and the first conductive member 411a and the second conductive member 411b are arranged side by side and in conductive contact with each other along a direction perpendicular to the first direction, the connecting end and the first end are both clamped between the two guard shells 412, and the connecting end is in conductive contact with the first conductive member 411a, and the first end is in conductive contact with the second conductive member 411b.

[0111] Hereinafter, the case where the first conductive member 411a and the second conductive member 411b are arranged oppositely along the first direction is described in detail as an example. As an example, refer to Figure 11 (D), the first conductive member 411a and the second conductive member 411b are arranged oppositely and adhere to each other along the first direction, and the first end and the connecting end are both in conductive contact with the peripheral surface of at least one of the first conductive member 411a and the second conductive member 411b.

[0112] According to some embodiments of the present application, refer to Figures 7 to 9 , and Figure 12 , the first conductive member 411a and the second conductive member 411b are arranged oppositely and spaced apart along the first direction, and at least one of the first end 420 and the connecting end is clamped between the first conductive member 411a and the second conductive member 411b.

[0113] The first conductive member 411a and the second conductive member 411b form a slit 410 therebetween, and at least one of the first end 420 and the connecting end extends into the slit 410 to be clamped by the first conductive member 411a and the second conductive member 411b. Figure 12 In some embodiments, both the first end 420 and the connecting end are clamped between the first conductive member 411a and the second conductive member 411b.

[0114] Compared with the technical solution that the first end 420 or the connecting end is in conductive contact with the side surface of the conductive member 411, the present embodiment forms a slit 410 between the first conductive member 411a and the second conductive member 411b for the connecting end and / or the first end 420 to extend into, so that the connecting end and / or the first end 420 can be in close contact with the surface of the first conductive member 411a and the second conductive member 411b along the thickness direction of the connecting end and / or the first end 420, the contact area is larger, the overcurrent area is larger, and the heat generated when the current flows between the busbar (the first busbar 30 or the second busbar 42) and the conductive member 411 is distributed more evenly.

[0115] According to some embodiments of the present application, the thickness t1 of the connecting end is smaller than the thickness t2 of the first end 420. The surface of the first conductive member 411a facing the second conductive member 411b is a first surface, the surface of the second conductive member 411b facing the first conductive member 411a is a second surface 4110, and the two opposite surfaces of the connecting end along the thickness direction thereof are in close contact with the first surface and the second surface 4110, respectively. The second surface 4110 is provided with a groove 4111 penetrating the surface of the second conductive member 411b along the extension direction of the first end 420 and forming a first opening, and the first end 420 extends into the groove 4111 through the first opening.

[0116] That is, the distance d1 between the first surface and the second surface 4110 along the first direction is equal to the thickness t1 of the connecting end. The first end 420 can be clamped between the two protective portions, or can be fixed between the two protective portions by a clamping technology, a screwing technology, a welding technology, or an adhesive technology.

[0117] In the present embodiment, the connecting end extends between the first conductive member 411a and the second conductive member 411b to be clamped, and since the thickness of the first end 420 is greater than the thickness of the connecting end, the groove 4111 is formed in the second surface 4110 so that the first end 420 can extend into the groove 4111 to be located between the two protective portions.

[0118] The present embodiment enables the adapter 40 to be adapted to the adaptation of the first busbar 30 and the second busbar 42 with different thicknesses. For example, the present embodiment can be applied in an embodiment in which the thickness of the first busbar 30 is smaller than the thickness of the second busbar 42 and the overcurrent cross-sectional area of the first busbar 30 is equal to the overcurrent cross-sectional area of the second busbar 42.

[0119] According to some embodiments of the present application, please refer to Figure 13 The first conductive member 411a is not overlapped with the groove 4111 in the orthographic projection of the second surface 4110, the first end 420 is connected with the second conductive member 411b through the fixed connecting member 43, the fixed connecting member 43 protrudes from the side of the first end 420 away from the second conductive member 411b along one end of the first direction and is located on the side of the first conductive member 411a facing the groove 4111, and the fixed connecting member 43 is located between the two protection portions.

[0120] Figure 13 Fig. 2A (B) is a schematic top view of the first conductive member 411a and the second conductive member 411b shown in Fig. 2A (A), wherein the connecting end 31 is clamped between the first conductive member 411a and the second conductive member 411b, and the connecting end 31 is represented by a dashed line. Figure 13 Fig. 2A (B) is a schematic front view of the first conductive member 411a and the second conductive member 411b shown in Fig. 2A (A). Figure 13 Fig. 2A (B) is a schematic front view of the first conductive member 411a and the second conductive member 411b shown in Fig. 2A (A).

[0121] The first conductive member 411a is not overlapped with the groove 4111 in the orthographic projection of the second surface 4110 means that the second conductive member 411b is not directly opposite to the first conductive member 411a. The fixed connecting member 43 can be any one of a screw, a bolt, a pin, and a rivet. The fixed connecting member 43 is located between the two protection portions means that the fixed connecting member 43 does not protrude to the side of the first conductive member 411a away from the second conductive member 411b relative to the second conductive member 411b.

[0122] In this embodiment, the first end 420 is connected with the second conductive member 411b through the fixed connecting member 43, and one end of the fixed connecting member 43 along the first direction is located on the side of the first conductive member 411a facing the groove 4111, so that the fixed connecting member 43 does not interfere with the first conductive member 411a. At the same time, by locating the fixed connecting member 43 between the two protection portions, the fixed connecting member 43 does not separately occupy the space of the adapter 40 along the first direction, but shares the space of the adapter 40 along the first direction with the first conductive member 411a, which is conducive to reducing the size of the adapter 40 along the first direction, and further reducing the space occupied by the adapter 40 in the battery box 20, thereby positively affecting the improvement of the volumetric energy density of the battery device 100.

[0123] According to some embodiments of the present application, please continue to refer to Figure 12 The orthographic projection of the first conductive member 411a can cover the groove 4111, and the two surfaces of the first end 420 along the thickness direction thereof are respectively attached to the surfaces of the first surface and the groove 4111 facing the first conductive member 411a.

[0124] In the embodiment, the sum of the distance d1 of the first surface and the second surface 4110 along the first direction and the groove depth d2 of the groove 4111 is equal to the thickness t2 of the first end 420, and the first end 420 also extends into the first conductive part 411a and the second conductive part 411b to be clamped, and the first end 420 and the connecting end 31 are in conductive contact with the first conductive part 411a and the second conductive part 411b.

[0125] It can be understood that in the embodiment in which the first busbar 30 and the second busbar 42 are both connected to the conductive part 411 by bolts, the bolt head occupies a certain space, therefore, the size of the adapter 40 along the axis direction of the bolt is larger, the space occupied by the adapter 40 in the battery box 20 is larger, and the volumetric energy density of the battery is affected. Moreover, one flow path of the current is: the first busbar 30 / second busbar 42-bolt-conductive part 411, wherein the internal resistance of the bolt is inversely proportional to the flow area of the bolt (i.e. the sectional area of the bolt along the direction perpendicular to the axis), and since the diameter of the bolt is small, the flow area is small, and the internal resistance is large, and a large amount of heat is generated when the current flows through the bolt, which is easy to cause hot spots at the bolted part due to local overheating.

[0126] The embodiment makes the connecting end 31 and the first end 420 both clamped by the first conductive part 411a and the second conductive part 411b to achieve fixation, and the connecting end 31 and the first end 420 are not fixed by bolts, so that the size occupied by the bolt head is released, the size of the adapter 40 along the first direction can be reduced, and the space occupied by the adapter 40 in the battery box 20 can be reduced, thereby positively affecting the improvement of the volumetric energy density of the battery device 100.

[0127] It should be noted that the embodiment makes the versatility of the adapter 40 enhanced when the first busbar 30 and the second busbar 42 meet the following condition: the thickness t2 of the first end 420-the thickness t1 of the connecting end 31 = the groove depth of the groove 4111, and the first busbar 30 and the second busbar 42 can both be adapted by the adapter 40.

[0128] Moreover, the battery device 100 of the embodiment does not need to screw bolts to screw the connecting end 31 and the conductive part 411 or screw the first end 420 and the conductive part 411 when assembling, and the connecting end 31 and the first end 420 can be inserted between the first conductive part 411a and the second conductive part 411b or moved to the corresponding position and then covered by the two protective parts, so that the assembly process is simplified.

[0129] Specifically, the assembling process of the battery device 100 of the embodiment can be performed according to the layout in the battery box 20, as long as no conflict or interference occurs. For example, after the battery cell assembly 10 is installed into the box 21, the two protective parts can be assembled to form the adapter 40, the adapter 40 is fixedly arranged in the box 21, and then the first bus bar 30 and the second bus bar 42 are moved into the box 21, and then the connecting end 31 and the first end 420 are inserted between the two protective parts of the adapter 40. For example, after the battery cell assembly 10 is installed into the box 21, one protective part can be fixedly arranged in the box 21, and then the first bus bar 30 and the second bus bar 42 are arranged in the box 21, so that the connecting end 31 and the first end 420 correspond to the protective part, and then the other protective part is moved into the box 21, so that the two protective parts are connected and clamped to hold the connecting end 31 and the first end 420.

[0130] In addition, the embodiment omits the bolt as an intermediate conductive component, so that the current path is shortened, the internal resistance is reduced, and the connecting end 31 and the first end 420 are directly attached to the conductive part 411, and the current-carrying area is larger, which is beneficial to reduce the possibility of generating hot spots.

[0131] According to some embodiments of the present application, please continue to refer to Figure 13 The first end 420 and the groove 4111 can be matched. The first end 420 and the groove 4111 are matched, which means that the shape of the first end 420 is matched with the shape of the groove 4111, and the size of the first end 420 is also matched with the size of the groove 4111. For example, the groove 4111 can be rectangular, trapezoidal, etc. By matching the first end 420 with the groove 4111, the first end 420 can be stably placed in the groove 4111.

[0132] According to some embodiments of the present application, each of the two protective parts includes a protective shell 412, and the two protective shells 412 are opposite and connected along the first direction, and the two protective parts are arranged at intervals along the first direction.

[0133] For example, one of the two protective shells 412 is provided with the conductive part 411. Alternatively, both of the two protective shells 412 are provided with the conductive part 411. The material of the two protective shells 412 is insulating material, for example, plastic, ceramic, etc. In this way, the adapter 40 can realize the connection of the first bus bar 30 and the second bus bar 42, and the adapter 40 is insulated and isolated from other electrical elements in the battery box 20 due to the insulating material of the protective shell 412, thereby reducing the risk of high-voltage leakage at the adapter.

[0134] The two protective parts are arranged in the first direction with a gap between the two protective shells 412, and the outer periphery of the gap is open, and the connecting end 31 and the first end 420 both extend into the gap from the outer periphery of the gap. The two protective shells 412 can be connected by screwing, clamping, welding, etc.

[0135] In some embodiments, referring to Figures 7 to 9 , the two protective shells 412 are connected by bolts 414, and by adjusting the bolts 414, at least one protective shell 412 can reciprocate in the first direction, which is conducive to further enhancing the versatility of the adapter 40, so that the adapter 40 is suitable for first bus bars 30 and second bus bars 42 of different thicknesses.

[0136] It can be understood that when the adapter 40 includes a box body and a box cover that cover each other, a transition port needs to be provided on the box cover for the connecting end 31 and the first end 420 to pass through. In this embodiment, by arranging the two protective parts in the first direction with a gap between the two protective shells 412, the connecting end 31 and the first end 420 can directly extend into the gap between the two protective shells 412 without the need to specially provide a transition port.

[0137] According to some embodiments of the present application, the extension direction of the connecting end 31 is the second direction, and the extension direction of the first end 420 is the third direction. The two protective shells 412 are a first protective shell 412a and a second protective shell 412b, and the surface of the first protective shell 412a facing the second protective shell 412b and / or the surface of the second protective shell 412b facing the first protective shell 412a is provided with a first limiting groove 413 and a second limiting groove 416, one end of the first limiting groove 413 along the second direction penetrates the outer surface of the adapter 40, and one end of the second limiting groove 416 along the third direction penetrates the outer surface of the adapter 40.

[0138] Part of the connecting end 31 is located in the first limiting groove 413, and the first limiting groove 413 is used to limit the displacement of the connecting end 31 in a direction perpendicular to both the first direction and the second direction; part of the second end is located in the second limiting groove 416, and the second limiting groove 416 is used to limit the displacement of the first end 420 in a direction perpendicular to both the first direction and the third direction.

[0139] Referring to Figure 12 , when the two protective parts both include conductive parts 411, the first conductive part 411a is arranged on the first protective shell 412a, and the second conductive part 411b is arranged on the second protective shell 412b. Optionally, the second direction and the third direction can be parallel. Optionally, the second direction and the third direction can also be perpendicular, and in Figures 7 to 9 , the second direction, the third direction, and the first direction are perpendicular to each other. In this example, the first limiting groove 413 is used to limit the displacement of the connecting end 31 in the third direction, and the second limiting groove 416 is used to limit the displacement of the first end 420 in the second direction.

[0140] As an example, please refer to Figure 8 , Figure 9 and Figure 12 , the second protective shell 412b is provided with a first limiting slot 413 and a second limiting slot 416 on the surface facing the first protective shell 412a. As an example, please refer to Figure 14 , the first protective shell 412a is provided with a first limiting slot 413 and a second limiting slot 416 on the surface facing the second protective shell 412b and on the surface facing the first protective shell 412a, and the first limiting slot 413 on the first protective shell 412a and the first limiting slot 413 on the second protective shell 412b are opposite to each other, and the second limiting slot 416 on the first protective shell 412a and the second limiting slot 416 on the second protective shell 412b are opposite to each other.

[0141] By providing the first protective shell 412a and / or the second protective shell 412b with the first limiting slot 413 and the second limiting slot 416, the connecting end 31 is arranged in the first limiting slot 413, and the first end 420 is arranged in the second limiting slot 416, and the displacement of the connecting end 31 along the direction perpendicular to the first direction and the extension direction of the connecting end 31 is limited, and the displacement of the first end 420 along the direction perpendicular to the first direction and the extension direction of the first end 420 is limited. In this way, the possibility that the connecting end 31 and / or the first end 420 move and cannot stably transmit current when the battery device 100 of the embodiment vibrates or is impacted (for example, the battery device 100 is applied to a vehicle, the vehicle is impacted, and the impact force is transmitted to the battery device 100) is reduced, which is beneficial to improve the switching stability between the first busbar 30 and the second busbar 42.

[0142] According to some embodiments of the present application, each of the two protective parts includes a conductive part 411, and the two conductive parts 411 (i.e., the first conductive part 411a and the second conductive part 411b) are electrically connected. Please refer to Figure 12 and Figure 14 , the outer surface of part of the connecting end 31 is covered with the first insulating layer 33 and is arranged in the first limiting slot 413, and the remaining part is stacked with the at least one conductive part 411 along the first direction, and the outer surface of part of the first end 420 is covered with the second insulating layer 421 and is arranged in the second limiting slot 416, and the remaining part is stacked with the at least one conductive part 411 along the first direction.

[0143] The material of the first insulating layer 33 and the second insulating layer 421 can be at least one of rubber, plastic, and asbestos, and the first insulating layer 33 and the second insulating layer 421 can be a polymer insulating material or an inorganic insulating material.

[0144] It can be understood that the part of the connecting end 31 covered by the first insulating layer 33 is connected with the first insulating layer 33 to form a first section, and the size of the first section along the first direction is greater than the size of the part of the connecting end 31 not covered by the first insulating layer 33 along the first direction (i.e. the thickness t1 of the connecting end 31). The part of the first end 420 covered by the second insulating layer 421 is connected with the second insulating layer 421 to form a second section, and the size of the second section along the first direction is greater than the size of the part of the first end 420 not covered by the second insulating layer 421 along the first direction (i.e. the thickness t2 of the first end 420).

[0145] Please refer to Figure 6 The electrically connecting section of the first bus bar 30 is also provided with the first insulating layer 33, which is beneficial to insulate and isolate the first bus bar 30 from the battery monomer assembly 10.

[0146] By providing the first insulating layer 33 and the second insulating layer 421, the first insulating layer 33 can insulate and isolate the connecting end 31 from the protective shell 412, and the second insulating layer 421 can insulate and isolate the first end 420 from the protective shell 412. This is beneficial to further improve the insulation and protection of the adapter 40.

[0147] According to some embodiments of the present application, the adapter 40 is configured such that the part of the connecting end 31 not provided with the first insulating layer 33 and the part of the first end 420 not provided with the second insulating layer 421 are clamped between the two conductive parts 411, and the part of the connecting end 31 provided with the first insulating layer 33 and the part of the first end 420 provided with the second insulating layer 421 are located between the two protective shells 412. In other words, the part of the connecting end 31 provided with the first insulating layer 33 and the part of the first end 420 provided with the second insulating layer 421 can be accommodated between the two protective shells 412.

[0148] On the basis of the part of the connecting end 31 covered by the first insulating layer 33 and the part of the first end 420 covered by the second insulating layer 421, the part of the connecting end 31 not provided with the first insulating layer 33 and the part of the first end 420 not provided with the second insulating layer 421 can be smoothly clamped between the two conductive parts 411.

[0149] In order to realize that the part of the connecting end 31 not provided with the first insulating layer 33 and the part of the first end 420 not provided with the second insulating layer 421 can be clamped between the two conductive parts 411, the two protective parts can be configured as follows: Figure 12The surface of the protective shell 412 is provided with a mounting groove 4120, the conductive member 411 is accommodated in the mounting groove 4120, and the conductive member 411 has a first dimension in the first direction, and the mounting groove 4120 has a second dimension in the first direction, the first dimension is greater than the second dimension, and the difference between the first dimension and the second dimension is not less than the thickness t3 of the first insulating layer 33 and the thickness t4 of the second insulating layer 421.

[0150] Alternatively, the two protective parts can also be configured as follows: the surface of the protective shell 412 is provided with a mounting groove 4120, a first limiting groove 413, and a second limiting groove 416, the conductive member 411 has a first dimension in the first direction, the mounting groove 4120 has a second dimension in the first direction, the first dimension is equal to the second dimension, the minimum distance between the connecting end 31 and the first limiting groove 413 in the first direction is not less than the thickness of the first insulating layer 33, and the minimum distance between the first end 420 and the second limiting groove 416 in the first direction is not less than the thickness of the second insulating layer 421.

[0151] Alternatively, the two protective parts can also be configured as follows: the conductive member 411 is protrudingly arranged on the surface of the protective shell 412, the conductive member 411 has a first dimension in the first direction, and the first dimension is not less than the thickness of the first insulating layer 33 and the thickness of the second insulating layer 421.

[0152] The thickness of the first insulating layer 33 refers to the normal distance between the surface of the first insulating layer 33 facing the connecting end 31 and the surface of the first insulating layer 33 away from the connecting end 31. Similarly, the thickness of the second insulating layer 421 refers to the normal distance between the surface of the second insulating layer 421 facing the first end 420 and the surface of the second insulating layer 421 away from the first end 420.

[0153] For example, in combination with Figure 12 and Figure 15 the surface of the second protective shell 412b facing the first protective shell 412a is provided with a mounting groove 4120, a first limiting groove 413, and a second limiting groove 416, and the second conductive member 411b is arranged on the second protective shell 412b. In combination with the foregoing description, in some embodiments, the second conductive member 411b is provided with a groove 4111 facing the surface of the first protective shell 412a, and in the present example, the dimension d3 of the first limiting groove 413 in the first direction is greater than the thickness t3 of the first insulating layer 33, and the dimension d4 of the second limiting groove 416 in the first direction is greater than the dimension d2 of the groove 4111 in the first direction.

[0154] For example, in combination with Figure 14 the surface of the first protective shell 412a facing the second protective shell 412b and the surface of the second protective shell 412b facing the first protective shell 412a are both provided with a mounting groove 4120, a first limiting groove 413, and a second limiting groove 416.

[0155] Two protection parts adopt any one scheme in the embodiment, the part of the connection end 31 which is not provided with the first insulating layer 33 and the part of the first end 420 which is not provided with the second insulating layer 421 can be clamped between the two conductive parts 411, and the first insulating layer 33 and the second insulating layer 421 will not interfere with the first protection shell 412a and the second protection shell 412b.

[0156] The embodiment of the second aspect of the application provides a power consumption device, which comprises the battery device 100 in the above embodiment, and the battery device 100 is used to provide electric energy.

[0157] The power consumption device comprises a vehicle (such as a car, an electric vehicle, a ship, a spacecraft, etc.), a display device (such as a mobile phone, a tablet computer, a notebook computer, etc.), an electric toy, an electric tool, etc. It can be understood that the power consumption device provided by the application uses any one of the above battery monomers, and thus the power consumption device has all the beneficial effects of the above battery monomers, which will not be described here.

[0158] The embodiment of the third aspect of the application provides an energy storage device, which comprises the battery device 100 in the above embodiment, and the battery device 100 is used to store energy.

[0159] The energy storage device can comprise but is not limited to a centralized energy storage device (for example, a container energy storage device), a distributed energy storage device, a movable energy storage device, a wearable energy storage device, etc.

[0160] It can be understood that the energy storage device provided by the application uses any one of the above battery monomers, and thus the energy storage device has all the beneficial effects of the above battery monomers, which will not be described here.

[0161] The above description is only a summary of the technical solutions of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described.

[0162] A specific embodiment of the application is described below. It should be understood that the specific embodiment is described only for the purpose of illustration and should not be interpreted as a limitation of the application.

[0163] Referring to the drawings, the battery device 100 comprises a battery box 20, a battery monomer assembly 10, a distribution box 51, an electric connection terminal 52, a first busbar 30, two second busbars 42 and two adapters 40. The battery box 20 comprises a box body 21 and a box cover 22 which are mutually covered, two expansion beams 211 are arranged in the box body 21 along the maximum expansion direction of the battery monomers (i.e. the thickness direction X of the battery monomers), the two expansion beams 211 divide the space in the box body 21 into a battery compartment and two containing compartments 210, the battery compartment is located between the two containing compartments 210, the two containing compartments 210 are respectively a first containing compartment and a second containing compartment, and the battery monomer assembly 10 is accommodated in the battery compartment. The distribution box 51, one of the second busbars 42 and one of the adapters 40 are accommodated in the first containing compartment. The electric connection terminal 52 is arranged on the side wall of the box body 21 and is located on the side of the battery monomer assembly 10 which is away from the distribution box 51, the other second busbar 42 and the other adapter 40 are accommodated in the second containing compartment.

[0164] Each second busbar 42 has a first end 420 and a second end at two ends along the extension direction thereof. The first busbar 30 has two connection ends 31 which are respectively located in the first containing compartment and the second containing compartment, the first busbar 30 has an electric connection section 32 between the two connection ends 31, the electric connection section 32 is located on the side of the battery monomer assembly 10 which faces the box cover 22 and is pressed against the battery monomer assembly 10. One of the connection ends 31 is electrically connected with the first end 420 of the first busbar 30 in the first containing compartment through the adapter 40 in the first containing compartment, the second end of the first busbar 30 in the first containing compartment is connected with the distribution box 51. The other connection end 31 is electrically connected with the first end 420 of the first busbar 30 in the second containing compartment through the adapter 40 in the second containing compartment, the second end of the first busbar 30 in the second containing compartment is connected with the electric connection terminal 52.

[0165] Each adapter 40 realizes the same way of adapting. Specifically, the adapter 40 comprises a first protective shell 412a and a second protective shell 412b oppositely and spacedly arranged, the opposite arrangement direction of the first protective shell 412a and the second protective shell 412b is parallel to the thickness direction of the corresponding connecting end 31 and the first end 420. The surface of the first protective shell 412a facing the second protective shell 412b is provided with a mounting groove 4120, and the first conductive part 411a is arranged in the mounting groove 4120. The surface of the second protective shell 412b facing the first protective shell 412a is provided with a mounting groove 4120, and the second conductive part 411b is arranged in the mounting groove 4120. The first conductive part 411a and the second conductive part 411b are also oppositely and spacedly arranged along the thickness direction of the connecting end 31 and the first end 420. The surface of the second conductive part 411b facing the first protective shell 412a is provided with a groove 4111, the groove 4111 penetrates the surface of the second conductive part 411b along the extension direction of the first end 420 and forms a first opening.

[0166] The surface of the second protective shell 412b facing the first protective shell 412a is also provided with a first limiting groove 413 and a second limiting groove 416, the first limiting groove 413 and the second limiting groove 416 are in communication with the mounting groove 4120, one end of the first limiting groove 413 along the extension direction of the connecting end 31 penetrates the surface of the second protective shell 412b and forms a second opening, one end of the second limiting groove 416 along the extension direction of the first end 420 penetrates the surface of the second protective shell 412b and forms a third opening. The extension direction of the connecting end 31, the extension direction of the first end 420 and the opposite arrangement direction are perpendicular to each other.

[0167] The outer surface of part of the connecting end 31 is covered with a first insulating layer 33, and the outer surface of part of the first end 420 is covered with a second insulating layer 421. The connecting end 31 extends into the first limiting groove 413 through the second opening, the part of the connecting end 31 covered with the first insulating layer 33 is accommodated in the first limiting groove 413, and the part of the connecting end 31 not covered with the first insulating layer 33 extends between the first conductive part 411a and the second conductive part 411b to be clamped and in conductive contact with the first conductive part 411a and the second conductive part 411b. The first end 420 extends into the second limiting groove 416 through the third opening, the part of the first end 420 covered with the second insulating layer 421 is accommodated in the second limiting groove 416, and the part of the first end 420 not covered with the second insulating layer 421 extends between the first conductive part 411a and the second conductive part 411b to be clamped and in conductive contact with the first conductive part 411a and the second conductive part 411b.

[0168] The first conductive part 411a protrudes towards the second protective shell 412b relative to the first protective shell 412a, and the protruding height is not less than the thickness of the first insulating layer 33 and the second insulating layer 421. The groove depth of the recess 4111 is less than the groove depth of the second limiting groove 416, and the difference between the groove depth of the recess 4111 and the groove depth of the second limiting groove 416 is not less than the thickness of the first insulating layer 33 and the second insulating layer 421.

[0169] It should also be noted that the adapter 40 in the first accommodating cavity is fixedly arranged on the bottom wall of the box body 21, and the relative arrangement direction of the first protective shell 412a and the second protective shell 412b in the adapter 40 is parallel to the height direction of the box body 21. The adapter 40 in the second accommodating cavity is fixedly arranged on the expansion beam 211, and the relative arrangement direction of the first protective shell 412a and the second protective shell 412b in the adapter 40 is parallel to the maximum expansion direction of the battery monomer.

[0170] Finally, it should be pointed out that: 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: it 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 the claims and the specification of the present application. Especially, 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 in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery box, comprising: a battery box; a high-voltage element arranged in the battery box; an adapter accommodated in the battery box, the adapter comprising two protective parts oppositely arranged and connected along a first direction, at least one of the two protective parts comprising a conductive part; a first busbar and a second busbar, both accommodated in the battery box; the first busbar has a connecting end, the second busbar has a first end and a second end, the connecting end and the first end both extend along a direction perpendicular to the first direction and are located between the two protective parts, at least one of the connecting end and the first end is clamped between the two protective parts, and the connecting end and the first end are electrically connected through the conductive part, and the second end is connected with the high-voltage element; wherein the first direction is parallel to the thickness direction of the connecting end and the first end.

2. The battery device according to claim 1, characterized by Each of the two protective parts comprises a conductive part, and the two conductive parts are a first conductive part and a second conductive part; the first conductive part is electrically connected with the second conductive part, and the connecting end and the first end are in conductive contact with at least one of the first conductive part and the second conductive part.

3. The battery device of claim 2, wherein, The first conductive part and the second conductive part are oppositely and spacedly arranged along the first direction; at least one of the first end and the connecting end is clamped between the first conductive part and the second conductive part.

4. The battery device of claim 3, wherein The thickness of the connecting end is smaller than the thickness of the first end. The surface of the first conductive part facing the second conductive part is a first surface, the surface of the second conductive part facing the first conductive part is a second surface, and the two surfaces of the connecting end along the thickness direction thereof are respectively attached to the first surface and the second surface; The second surface is provided with a groove, the groove penetrates the surface of the second conductive part along the extension direction of the first end and forms a first opening, and the first end extends into the groove through the first opening.

5. The battery device of claim 4, wherein The first conductive part is projected on the second surface and covers the groove, and the two surfaces of the first end along the thickness direction thereof are respectively attached to the first surface and the surface of the groove facing the first conductive part; Alternatively, the first conductive part is projected on the second surface and does not coincide with the groove, the first end is connected with the second conductive part through a fixed connecting part, one end of the fixed connecting part along the first direction protrudes from the side of the first end away from the second conductive part and is located on the side of the first conductive part facing the groove, and the fixed connecting part is located between the two protective parts.

6. The battery device of claim 4, wherein The first end is matched with the groove.

7. The battery device according to any one of claims 1 to 6, characterized by, Each of the two protective parts comprises a protective shell, and the two protective shells are oppositely arranged and connected along the first direction, and the two protective parts are spacedly arranged along the first direction.

8. The battery device of claim 7, wherein, The extension direction of the connecting end is a second direction, and the extension direction of the first end is a third direction. The two protective shells are a first protective shell and a second protective shell, and surfaces of the first protective shell facing the second protective shell and / or surfaces of the second protective shell facing the first protective shell are provided with a first limiting groove and a second limiting groove, the first limiting groove extends along the second direction and penetrates through an outer surface of the adapter, and the second limiting groove extends along the third direction and penetrates through the outer surface of the adapter. Part of the connecting end is located in the first limiting groove, and the first limiting groove is used for limiting displacement of the connecting end along a direction perpendicular to the first direction and the second direction; and part of the first end is located in the second limiting groove, and the second limiting groove is used for limiting displacement of the first end along a direction perpendicular to the first direction and the third direction.

9. The battery device of claim 8, wherein, Each of the two protective parts includes the conductive piece, and the two conductive pieces are electrically connected; an outer surface of part of the connecting end is covered with a first insulating layer and is accommodated in the first limiting groove, and the remaining part of the connecting end is stacked with at least one conductive piece along the first direction; and an outer surface of part of the first end is covered with a second insulating layer and is accommodated in the second limiting groove, and the remaining part of the first end is stacked with at least one conductive piece along the first direction.

10. The battery device of claim 9, wherein, The adapter is configured such that the part of the connecting end without the first insulating layer and the part of the first end without the second insulating layer are clamped between the two conductive pieces, and the part of the connecting end with the first insulating layer and the part of the first end with the second insulating layer are located between the two protective shells.

11. The battery device of claim 10, wherein, The two protective parts are configured to satisfy one of the following structures: A surface of the protective shell is provided with a mounting groove, the conductive piece is accommodated in the mounting groove, and a size of the conductive piece along the first direction is a first size, a size of the mounting groove along the first direction is a second size, and a difference between the first size and the second size is not less than a thickness of the first insulating layer and a thickness of the second insulating layer; A surface of the protective shell is provided with a mounting groove, the first limiting groove and the second limiting groove, a size of the conductive piece along the first direction is a first size, a size of the mounting groove along the first direction is a second size, the first size is equal to the second size, a minimum distance between the connecting end and the first limiting groove along the first direction is not less than the thickness of the first insulating layer, and a minimum distance between the first end and the second limiting groove along the first direction is not less than the thickness of the second insulating layer; The conductive piece is protrudingly arranged on the surface of the protective shell, and a size of the conductive piece along the first direction is a first size, and the first size is not less than the thickness of the first insulating layer and the thickness of the second insulating layer.

12. An electrical device, characterized by The power-using equipment includes the battery device as claimed in any one of claims 1 to 11, and the battery device is used for providing electric energy.

13. An energy storage device, characterized by, The energy storage device includes the battery device as claimed in any one of claims 1 to 11, and the battery device is used for storing electric energy.

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