Battery device, electric device, and energy storage device

Abstract

The application provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a plurality of battery monomers, a box body, a junction box, an electric connection terminal, an electric connection piece and an upper cover. The plurality of battery monomers are located in a first accommodating cavity defined by a frame of the box body and a first beam, the junction box electrically connected to the plurality of battery monomers is located on a side of the first beam away from the battery monomers, the electric connection terminal is arranged on the frame and located on a side of the first accommodating cavity away from the junction box, the junction box and the electric connection terminal are electrically connected through the electric connection piece, the upper cover is covered on the box body, the upper cover comprises a protruding part protruding towards the inside of the first accommodating cavity, the electric connection piece is configured to be bent in the height direction of the box body to pass over the first beam, and two opposite surfaces of the electric connection piece in the height direction of the box body respectively abut against at least part of the plurality of battery monomers and the protruding part. The application can improve the overall anti-expansion performance and main frequency stability of the battery device.

Description

TECHNICAL FIELD

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of society. Batteries are widely used in various power utilization 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 the battery device, the wiring box and the electrical connection terminal arranged on different sides need to be electrically connected through the electrical connection piece. However, the battery box is usually provided with some limiting structures for limiting the battery monomer, such as an expansion beam. In order to avoid interference between the electrical connection piece and the expansion beam and other components, a slot can be opened on the expansion beam to allow the electrical connection piece to pass through, but this will reduce the structural strength of the battery box, thereby affecting the reliability of the battery device. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, a power utilization device and an energy storage device, which can improve the structural reliability of the battery device.

[0005] Embodiments of the first aspect of the present application provide a battery device, which comprises a plurality of battery monomers, a box, a wiring box, an electrical connection terminal, an electrical connection piece and an upper cover. The box comprises a frame and a first beam connected to the frame, and the frame and the first beam are used to define a first accommodating cavity for accommodating the plurality of battery monomers. The wiring box is electrically connected to the plurality of battery monomers, and the wiring box is located on the side of the first beam away from the battery monomers. The electrical connection terminal is arranged on the frame, and the electrical connection terminal is located on the side of the first accommodating cavity away from the wiring box. The two ends of the electrical connection piece are respectively electrically connected to the wiring box and the electrical connection terminal. The upper cover covers the box, and the upper cover comprises a protruding portion protruding towards the inside of the first accommodating cavity. The electrical connection piece is configured to be bent in the height direction of the box to pass over the first beam, and the two opposite surfaces of the electrical connection piece in the height direction of the box respectively abut against at least part of the plurality of battery monomers and the protruding portion.

[0006] In the technical scheme of the embodiment of the application, the electric connector connected with the terminal box and the electric connection terminal at two ends is configured to be bent in the height direction of the box, so that the electric connector can pass over the first beam in the height direction without the need to open a slot in the end of the first beam to allow the electric connector to pass through, without damaging or reducing the connection strength of the first beam and the frame, which is conducive to improving the structural strength of the battery box and the structural reliability of the battery device. The upper cover is provided with a protruding portion abutting against the electric connector, so that the electric connector can be more tightly abutted against the battery monomer, which not only enhances the overall anti-expansion performance of the battery device, but also improves the main frequency stability of the battery device and reduces the risk of component failure caused by resonance.

[0007] In some embodiments, the box further includes a bottom plate connected with the frame, and the bottom plate is used to carry the plurality of battery monomers. The electric connector includes a first segment electrically connected with the terminal box, a second segment electrically connected with the electric connection terminal, and a third segment located between the first segment and the second segment. The third segment is located on the side of the first beam away from the bottom plate, and the third segment is in contact with the surface of at least part of the plurality of battery monomers away from the bottom plate. In this way, the electric connector and the bottom plate can be located on opposite sides of the plurality of battery monomers, so as to reasonably utilize the layout space of the battery device while reducing the influence of the electric connector on the connection length of the frame and the first beam, and to reduce the mutual interference between the electric connector and the bottom plate. Moreover, the relative displacement of at least part of the battery monomers can be limited, which is conducive to improving the overall stiffness of the battery device to improve the main frequency of the battery device.

[0008] In some embodiments, the third segment of the electric connector includes a conductive portion and an insulating portion in the height direction of the box, and the conductive portion is used to realize the electrical connection between the first segment and the second segment. The insulating portion is located on the surface of the conductive portion facing the bottom plate and abuts against the surface of at least part of the plurality of battery monomers away from the bottom plate. In this way, the main frequency of the battery device can be improved by using the conductive portion and the insulating portion, and the insulation between the battery monomer and the conductive portion can be realized by the insulating portion.

[0009] In some embodiments, the insulating portion is made of an elastic material. In this way, the vibration impact of the battery monomer can be absorbed to a certain extent, the vibration of the battery device generated when subjected to vibration excitation can be alleviated, the main frequency of the battery device can be improved, and the service life of the electric connector can also be improved.

[0010] In some embodiments, the insulating portion is a molded plate. In this way, the main frequency of the battery device can be improved while the manufacturing efficiency of the battery device is improved and the space occupied by the insulating portion in the height direction of the box is reduced.

[0011] In some embodiments, the third segment of the electrical connector further comprises a first adhesive layer, and the insulating portion is adhered to the conductive portion through the first adhesive layer. In this way, the insulating portion and the conductive portion can be conveniently installed in a production line, the manufacturing process is simplified, and the insulating portion and the conductive portion are designed as a whole.

[0012] In some embodiments, the battery device further comprises a second adhesive layer. The insulating portion is adhered to at least part of the plurality of battery cells away from the surface of the bottom plate through the second adhesive layer. In this way, the insulating portion and the battery cells can be in close contact, and the main frequency stability of the battery device can be improved.

[0013] In some embodiments, the thickness dimension of the conductive portion is smaller than the width dimension of the conductive portion. In this way, the contact area of the electrical connector and the battery cell can be increased, and the space occupied by the conductive portion in the height direction of the box body can be reduced, which is beneficial to improve the energy density of the battery device.

[0014] In some embodiments, the thickness dimension T of the conductive portion and the width dimension W of the conductive portion satisfy: 5≤W / T≤50. In this way, the conductive portion can reduce its space occupation in the height direction while providing sufficient flow area, so that the battery device structure is more compact, and the energy density of the battery is improved.

[0015] In some embodiments, the thickness dimension T of the conductive portion satisfies: 0<T≤2mm. In this way, the space occupied by the conductive portion in the height direction of the box body can be reduced, and the energy density of the battery device can be improved.

[0016] In some embodiments, the width dimension W of the conductive portion satisfies: 30mm≤W≤100mm. In this way, the conductive portion can have better heat dissipation capacity and increase the contact area with the battery cell.

[0017] In some embodiments, the plurality of battery cells comprises a plurality of groups of battery cells arranged side by side along a first direction, and each group of battery cells comprises at least one battery cell stacked along a second direction. In a projection plane perpendicular to the height direction of the box body, the orthographic projection of the electrical connector partially overlaps with the orthographic projection of two adjacent groups of battery cells. In this way, the main frequency of the battery device can be improved.

[0018] In some embodiments, the electrical connector further comprises a buffer portion located on the side of the conductive portion of the third segment away from the bottom plate, and the conductive portion is in abutment with the protruding portion through the buffer portion. In this way, the buffer and fixation between the conductive portion and the protruding portion can be achieved, external impact can be absorbed, the compression reliability between the conductive portion and the protruding portion can be improved, and the risk of component failure caused by resonance can be reduced.

[0019] In some embodiments, the frame and the first beam are further used to define a second accommodating cavity for accommodating the junction box. In this way, the integration of the battery device can be improved.

[0020] Embodiments of the second aspect of the present application provide a power utilization device comprising the battery device in the above embodiments, wherein the battery device is configured to provide electric energy.

[0021] Embodiments of the third aspect of the present application provide an energy storage device comprising the battery device in the above embodiments, wherein the battery device is configured to store electric energy.

[0022] The above description is merely 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 and to implement the same according to the contents of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0023] 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 limiting of the scope of the present application.

[0024] Figure 1 Structure diagram of a vehicle according to some embodiments of the present application;

[0025] Figure 2 Structure diagram of a battery device according to some embodiments of the present application;

[0026] Figure 3 Exploded structure diagram of a battery cell according to some embodiments of the present application;

[0027] Figure 4 Structure diagram of an electrical connector according to some embodiments of the present application;

[0028] Figure 5 Exploded structure diagram of an electrical connector according to some embodiments of the present application;

[0029] Figure 6 Structure diagram of a battery device according to further embodiments of the present application;

[0030] Figure 7 Structure diagram of a battery device according to further embodiments of the present application; Figure 6 Cross-sectional view along direction A-A;

[0031] Figure 8 Structure diagram of a battery device according to further embodiments of the present application; Figure 7 Enlarged view of a portion B;

[0032] Figure 9 Structure diagram of a battery cell and a connecting plate according to some embodiments of the present application;

[0033] Figure 10 Fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present application; Figure 9 Fig. 2 is a partial enlarged view of a local part at C in Fig. 1;

[0034] Figure 11 Fig. 3 is a partial enlarged view of an electrical connection terminal and an electrical connection piece of some embodiments of the present application connected through an adapter;

[0035] Figure 12 Fig. 4 is a schematic structural view of a first adapter and a second adapter of some embodiments of the present application.

[0036] Legend of reference signs:

[0037] Fig. 1 is a schematic structural view of a vehicle according to an embodiment of the present application;

[0038] Fig. 2 is a partial enlarged view of a local part at C in Fig. 1;

[0039] Fig. 3 is a partial enlarged view of an electrical connection terminal and an electrical connection piece of some embodiments of the present application connected through an adapter; Fig. 4 is a schematic structural view of a first adapter and a second adapter of some embodiments of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover not exclusive inclusion.

[0042] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0043] Reference within this document 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 appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments unless explicitly stated otherwise.

[0044] In the description of the embodiments of the present application, the term "and / or" is merely used to describe associated objects, and can represent that three conditions can exist, for example, A and / or B can mean that the three conditions of A alone, A and B, and B alone can exist. In addition, the character " / " in the present application generally means that the preceding and following associated objects are in an "or" relationship.

[0045] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0046] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to various electronic equipment, such as electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing. It should be noted that the battery in the present application can refer to a battery monomer or a battery device, and the battery can be a rechargeable battery.

[0049] In the battery device, in addition to bearing the battery monomer and the terminal box, the battery box is also used to bear the electrical connection terminal connected with the external power consumption equipment or the charging equipment. In some embodiments, part of the electrical connection terminal and the terminal box are respectively located on both sides of the accommodation cavity accommodating the plurality of battery monomers, and the electrical connection piece connecting the electrical connection terminal and the terminal box needs to extend from one end of the battery box to the other end, which will interfere with the first beam (for example, the first beam is an expansion beam) in the battery box for limiting the battery monomer. In order to avoid interference, the electrical connection piece can be arranged along the frame of the battery box opposite to the side surface of the battery monomer, and a through slot is arranged at the connection between the first beam and the frame of the battery box for the electrical connection piece to pass through, but the first beam slotting will reduce the connection length of the frame and the first beam, weaken the connection strength of the two, and further affect the reliability of the battery device.

[0050] Based on the above consideration, in order to reduce the influence of the electrical connection piece on the connection length of the frame and the first beam and improve the reliability of the battery device, the embodiments of the present application provide a battery device, which comprises a plurality of battery monomers, a box, a terminal box, an electrical connection terminal, an electrical connection piece and an upper cover. The box comprises a frame and a first beam connected with the frame, and the frame and the first beam are used to define a first accommodation cavity accommodating the plurality of battery monomers. The terminal box is electrically connected with the plurality of battery monomers, and the terminal box is located on the side of the first beam away from the battery monomers. The electrical connection terminal is arranged on the frame, and the electrical connection terminal is located on the side of the first accommodation cavity away from the terminal box. The two ends of the electrical connection piece are respectively electrically connected with the terminal box and the electrical connection terminal. The upper cover covers the box, and the upper cover comprises a protruding part protruding towards the inside of the first accommodation cavity. Wherein, the electrical connection piece is configured to be bent towards the height direction of the box to pass over the first beam, and the two opposite surfaces of the electrical connection piece along the height direction of the box respectively abut against at least part of the plurality of battery monomers and the protruding part.

[0051] In the technical scheme of the embodiments of the present application, the electrical connection piece is configured to be bent towards the height direction of the box to pass over the first beam, so that the interference between the electrical connection piece and the first beam can be avoided, without slotting at the connection between the first beam and the frame, and without reducing the connection length and the connection strength of the frame and the first beam, so as to improve the structural strength and the reliability of the battery device.

[0052] The battery monomer and the battery device disclosed by the embodiments of the present application can be used in, but are not limited to, an electric device or an energy storage device for a vehicle, a ship or an aircraft. The power supply system of the electric device or the energy storage device can be composed of the battery monomer, the battery device and the like disclosed by the present application. In this way, the influence of the electric connector on the connection length of the frame and the first beam can be reduced, and the reliability of the battery device can be improved.

[0053] The embodiments of the present application provide an electric device using the battery device as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric aircraft toy and the like. The spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft and the like.

[0054] The embodiments of the present application also provide an energy storage device using the battery device as a power supply. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack or a portable energy storage system and the like.

[0055] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0056] Please refer to Figure 1 , Figure 1 The vehicle structure schematic diagram provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile. The new energy automobile can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle. The vehicle 1000 is internally provided with a battery device 100. The battery device 100 can be arranged at the bottom, the head or the 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 supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0057] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figures 2-8 The embodiments of the present application provide a battery device 100. The battery device 100 includes a plurality of battery monomers 10, a box body 20, a junction box (not shown in the figure), an electric connection terminal 30, an electric connector 40 and an upper cover 70.

[0059] The box 20 includes a frame 201 and a first beam 202 connected to the frame 201, and the frame 201 and the first beam 202 are used to define a first accommodating cavity 20A for accommodating a plurality of battery cells 10.

[0060] The junction box is electrically connected to the plurality of battery cells 10, and the junction box is located on a side of the first beam 202 away from the battery cells 10.

[0061] The electrical connection terminal 30 is arranged on the frame 201, and the electrical connection terminal 30 is located on a side of the first accommodating cavity 20A away from the junction box.

[0062] The two ends of the electrical connection piece 40 are respectively electrically connected to the junction box and the electrical connection terminal 30.

[0063] The upper cover 70 covers the box 20, and the upper cover 70 includes a protruding portion 701 protruding towards the inside of the first accommodating cavity 20A.

[0064] The electrical connection piece 40 is configured to be bent in the height direction X of the box 20 to pass over the first beam 202, and the two opposite surfaces of the electrical connection piece 40 in the height direction of the box 20 are respectively in contact with at least part of the plurality of battery cells 10 and the protruding portion 701.

[0065] It should be noted that, Figure 2 The space range of the first accommodating cavity 20A is shown, and only part of the battery cells 10 is shown to be accommodated in the first accommodating cavity 20A, Figure 2 The number of battery cells 10 shown is not intended to limit the present application.

[0066] The battery device 100 is a device for storing and providing electrical energy. The battery device 100 can include at least one battery cell 10.

[0067] The battery cell 10 refers to the smallest unit constituting the battery device 100. The battery cell 10 can include a housing assembly 101, an electrode assembly 102, and an electrolyte. The housing assembly 101 is used to accommodate the electrode assembly 102 and the electrolyte. The housing assembly 101 can include a case 1011 having an opening and an end cap 1012 that covers the opening of the case 1011 to form an accommodation space that accommodates the electrode assembly 102 and the electrolyte. The housing assembly 101 can be in various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc.; the material of the housing assembly 101 can be various, such as but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, etc. The electrode assembly 102 is a component in the battery cell 10 where electrochemical reactions occur. There can be one or more electrode assemblies 102 contained within the housing assembly 101. The electrode assembly 102 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute the main body of the electrode assembly 102, and the portions of the positive electrode sheet and the negative electrode sheet without active materials each constitute a tab 1021. The positive and negative electrode tabs can be located together at one end of the main body or at two ends of the main body, respectively. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tab 1021 connects the electrode terminal 103 to form a current loop.

[0068] The end cap 1012 can be provided with functional components such as the electrode terminal 103. The electrode terminal 103 can be used to electrically connect with the electrode assembly 102 for outputting or inputting the electrical energy of the battery cell 10, and the electrode terminal 103 includes a positive electrode and a negative electrode.

[0069] When multiple battery cells 10 are included in the battery device 100, the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. Among them, the mixed connection means that there are both series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole of the multiple battery cells 10 is accommodated in the box 20; of course, the battery device 100 can also be that the multiple battery cells 10 are first connected in series, in parallel, or in a mixed connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and are accommodated in the box 20.

[0070] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0071] The box 20 is used to provide a containing space for the battery cell 10, and the box 20 can adopt various structures. In some embodiments, the box 20 can be a hollow structure with one end open. In other embodiments, the box 20 can also be a hollow structure with opposite ends open. The material of the box 20 can be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, etc., or a composite material such as glass fiber and epoxy resin.

[0072] The frame 201 in the box 20 refers to the side wall that constitutes the containing space of the box 20. In the projection plane perpendicular to the height direction X of the box 20, the frame 201 of the box 20 can be a polygon or the like. The frame 201 can be a plate structure member or an extruded profile member.

[0073] The first beam 202 is a component for providing constraint and limiting for the battery cell 10. In some embodiments, the first beam 202 can be an expansion beam, which is a structure capable of bearing and limiting the expansion force of the battery cell, and capable of enhancing the overall structural strength of the battery box. The expansion beam can be an extruded profile, and when installed, the two ends of the expansion beam can be fixedly connected with the frame by welding, thereby being used to suppress the expansion of the battery cell 10.

[0074] In some embodiments, the first beam 202 and the frame 201 are fixedly connected. In some embodiments, the first beam 202 and the frame 201 can be integrally formed. In other embodiments, the first beam 202 and the frame 201 can also be independently formed and fixedly connected by welding, clamping or the like.

[0075] In some embodiments, the first beam 202 is located in the containing space surrounded by the frame 201, and the opposite ends of the first beam 202 along the length direction thereof are fixedly connected with the frame 201. Since the design of the battery cell 10 is usually to stack electrode materials together, and the space between the layers is limited, when gas is generated inside the battery cell 10, the battery cell 10 is prone to expand along the thickness direction thereof. Therefore, in order to enable the first beam 202 to suppress the expansion of the battery cell 10, the length direction of the first beam 202 can be arranged perpendicular to the thickness direction of the battery cell 10.

[0076] In some embodiments, the box 20 includes at least one first beam 202. In some embodiments, the box 20 is provided with a plurality of first beams 202, and the plurality of first beams 202 are arranged in parallel and spaced apart along the horizontal direction, and a plurality of battery cells 10 are arranged between the adjacent two first beams 202.

[0077] In some embodiments, the battery cell 10 is a square cell. The terminal box, the first containing cavity 20A containing a plurality of battery cells 10, and the electrical connecting member 40 are arranged along the thickness direction of the battery cell 10 (such as the direction Y in FIG. 1).Figure 2 The first beam 202 extends along the length direction of the battery cell 10 (e.g., the Y direction in FIG. 1), and the opposite ends of the first beam 202 along the length direction of the battery cell 10 are fixedly connected to the frame 201. Figure 2 The first beam 202 extends along the length direction of the battery cell 10 (e.g., the Y direction in FIG. 1), and the opposite ends of the first beam 202 along the length direction of the battery cell 10 are fixedly connected to the frame 201.

[0078] The first accommodating cavity 20A is a space defined by the frame 201 and the first beam 202, and is used to accommodate the battery cell 10. It should be noted that the frame 201 and the first beam 202 can jointly define at least one first accommodating cavity 20A, and any first accommodating cavity 20A can accommodate at least one battery cell 10.

[0079] The junction box is a power device used to connect and distribute power among multiple battery cells 10 and other devices. In some embodiments, the junction box includes a high-voltage box. The high-voltage box can be used to connect multiple battery cells 10 and other high-voltage electrical components (e.g., motors, inverters, chargers, etc.). In some embodiments, the junction box includes safety devices such as fuses and circuit breakers to prevent damage caused by overcurrent or short circuits. In some embodiments, the junction box can have the function of monitoring voltage and current, so as to report status information to the control system of the vehicle.

[0080] The electrical connection terminal 30 is an electrical connection device used to transmit power or signals. The electrical connection terminal 30 provided on the frame 201 can mean that the frame 201 is provided with an opening for mounting the electrical connection terminal 30. The electrical connection terminal 30 and the junction box can be provided on opposite sides of the first accommodating cavity 20A. In some embodiments, the electrical connection terminal 30 includes a high-voltage connector.

[0081] The electrical connection 40 is a connecting component for electrically connecting electrical devices. Since the electrical connection terminal 30 and the junction box are provided on opposite sides of the first accommodating cavity 20A, and the junction box needs to be electrically connected to the electrical connection terminal 30 to realize the transmission of power. Therefore, the electrical connection 40 is provided to realize the electrical connection between the junction box and the electrical connection terminal 30 through the electrical connection 40.

[0082] In some embodiments, the electrical connection 40 includes a connecting tab. In some embodiments, the material of the connecting tab is metal such as copper or aluminum.

[0083] The height direction X of the box 20 refers to a direction from the bottom of the box 20 to the top. In some embodiments, the height direction X of the box 20 can be the same as the height direction of the battery cell 10, which is perpendicular to the thickness direction of the battery cell 10. In some embodiments, the box 20 includes a bottom plate 203 for carrying the plurality of battery cells 10, and the height direction X of the box 20 can refer to a direction from a side of the bottom plate 203 away from the plurality of battery cells 10 to a side of the bottom plate 203 toward the plurality of battery cells 10.

[0084] The upper cover 70 refers to a component that covers the opening of the box 20. In some embodiments, the upper cover 70 is oppositely arranged with the bottom plate 203, and the upper cover 70, the bottom plate 203, and the frame 201 form a containing space of the box 20 containing the first containing cavity 20A. The material of the upper cover 70 can include but is not limited to metals such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and can also be made of non-metallic materials.

[0085] The protruding portion 701 is a portion of the upper cover 70 protruding toward the inside of the first containing cavity 20A, and the protruding portion 701 can be stamped from the upper cover 70.

[0086] In some embodiments, the shape and size of the protruding portion 701 can be adapted to the shape and size of the electrical connector, for example, can be a long strip shape with the same extension direction as the part of the electrical connector 40 located on the top of the battery cell 10, and for example, the length and width of the bottom surface of the protruding portion 701 in contact with the electrical connector 40 are the same as the part of the electrical connector 40 located on the top of the battery cell 10.

[0087] It can be understood that the contact between the upper cover 70 and the electrical connector 40 is an insulating contact. The upper cover 70 can be made of an insulating material, or an insulating layer can be provided on the part of the upper cover 70 in contact with the electrical connector 40 to prevent the formation of an electrical connection between the two and unnecessary electric leakage.

[0088] The electrical connector 40 is configured to be bent in the height direction X of the box 20 to pass over the first beam 202, which means that at least a part of the electrical connector 40 is bent in the height direction X of the box 20 relative to the two connecting ends of the electrical connector, so that the electrical connector 40 avoids the position where the first beam 202 is located. In some examples, as shown in Figure 2 The electrical connector 40 is configured to be bent in the height direction X of the box 20 to pass over the first beam 202, which means that at least a part of the electrical connector 40 is bent in the height direction X of the box 20 relative to the two connecting ends of the electrical connector, so that the electrical connector 40 avoids the position where the first beam 202 is located. In some examples, as shown in

[0089] It should be noted that the abutment between the battery monomer 10, the electrical connection 40 and the protruding part 701 can be direct abutment or indirect abutment through some other functional layer or component.

[0090] During the repeated alternation of energy storage and output, the battery device 100 will generate multiple rounds of repeated expansion force. Therefore, it is necessary to make the power consumption device using the battery device 100 in different working conditions. For example, if the battery device 100 is used in a vehicle, the vehicle needs to be in various working conditions such as climbing constant frequency working condition, sudden acceleration working condition, sudden deceleration working condition, variable speed working condition, idling working condition, etc. during use. The expansion force of the battery device 100 is still stable and maintains a high main frequency.

[0091] However, in actual application, the battery device 100 is affected by impact, vibration and other excitations, which may cause the battery monomer to break free from the constraint, reduce the main frequency of the battery device, easily resonate with the whole vehicle, and cause the amplitude of the battery device 100 to increase sharply, thereby easily causing structural fatigue failure or functional failure of the battery device 100. Therefore, in order to improve the problem of main frequency reduction caused by impact, vibration and other excitations affecting the battery device 100, leading to resonance, the electrical connection 40 is abutted to the top of the battery monomer 10 through the protruding part 701. The relative displacement of at least part of the battery monomer 10 in contact with the electrical connection 40 can be correspondingly limited, which is beneficial to improve the main frequency stability of the battery device 100 and reduce the risk of component failure caused by resonance.

[0092] By bending the electrical connection 40 connecting the junction box and the electrical connection terminal 30 to the height direction X of the box 20 to pass over the first beam 202, so that the electrical connection 40 no longer passes through the connection between the first beam 202 and the frame 201, and then the first beam 202 does not need to be provided with a slot avoiding the first beam 202, and further the connection between the first beam 202 and the frame 201 is not affected by the electrical connection 40, which is beneficial to improve the structural strength of the box 20, improve the anti-expansion performance of the battery device 100 as a whole, and improve the reliability of the battery device 100.

[0093] Please continue to refer to Figure 2 and Figures 4-5 According to some embodiments of the present application, the box 20 further comprises a bottom plate 203 connected with the frame 201, and the bottom plate 203 is used to carry a plurality of battery monomers 10. The electrical connection 40 comprises a first section 401 electrically connected with the junction box, a second section 402 electrically connected with the electrical connection terminal 30, and a third section 403 located between the first section 401 and the second section 402. The third section 403 is located on the side of the first beam 202 away from the bottom plate 203, and the third section 403 is in contact with the surface of at least part of the plurality of battery monomers 10 away from the bottom plate 203.

[0094] The bottom plate 203 is a component that carries the plurality of battery cells 10. In some embodiments, the bottom plate 203 can be integrally formed with the frame 201, or can be independently formed from the frame 201. In other embodiments, a water-cooling plate can be reused as the bottom plate 203.

[0095] The electrical connector 40 includes a first segment 401, a second segment 402, and a third segment 403 connected between the first segment 401 and the second segment 402. The first segment 401 is configured to be electrically connected to the junction box, the second segment 402 is configured to be electrically connected to the electrical connection terminal 30, and the third segment 403 is located on the side of the first beam 202 away from the bottom plate 203. That is, the third segment 403 is arranged across the first beam 202.

[0096] The third segment 403 being in contact with the surface of at least some of the plurality of battery cells 10 away from the bottom plate 203 can mean that the surface of some of the plurality of battery cells 10 away from the bottom plate 203 is in contact with the third segment 403, or that the surface of all of the plurality of battery cells 10 away from the bottom plate 203 is in contact with the third segment 403.

[0097] In some embodiments, the third segment 403 can be located at the top of the battery cell 10 and in contact with the upper surface of the battery cell 10, so as to provide vertical constraint to the battery cell 10.

[0098] In some embodiments, the battery cell 10 overlapping the arrangement position of the third segment 403 in the arrangement path of the third segment 403 is in contact with the third segment 403. That is, in the projection plane perpendicular to the height of the box 20, the battery cell 10 overlapping the orthographic projection of the third segment 403 is in contact with the third segment 403.

[0099] In some embodiments, the third segment 403 can extend in a straight line, so as to reduce the connection distance between the junction box and the electrical connection terminal 30 and shorten the power transmission path. It can be understood that the third segment 403 can also extend in a curve, a polyline, or the like, which is not limited in the present application.

[0100] The free end of the first segment 401 can be directly or indirectly electrically connected to the junction box, and the free end of the second segment 402 can be directly or indirectly connected to the electrical connection terminal 30. In some examples, at least one of the two connection ends of the electrical connector 40 can be electrically connected to the connection object through an adapter, which can be an adapter that matches the connection end of the electrical connector 40 and the connection end of the connection object at the same time.

[0101] By locating the third segment 403 of the electrical connecting member 40 on the side of the first beam 202 away from the bottom plate 203 of the box 20, the electrical connecting member 40 and the bottom plate 203 are located on opposite sides of the plurality of battery monomers 10, thereby reducing the influence of the electrical connecting member 40 on the connection length of the frame 201 and the first beam 202, reasonably utilizing the layout space of the battery device 100, and reducing the mutual interference between the electrical connecting member 40 and the bottom plate 203.

[0102] By contacting the third segment 403 with at least part of the plurality of battery monomers 10 away from the surface of the bottom plate 203, the relative displacement of at least part of the plurality of battery monomers 10 is limited, which is beneficial to improve the overall rigidity of the battery device 100, and to improve the main frequency of the battery device 100.

[0103] Please continue to refer to Figure 2 and Figures 4-5 According to some embodiments of the present application, the third segment 403 of the electrical connecting member 40 includes a conductive part 4031 and an insulating part 4032 along the height direction X of the box 20, and the conductive part 4031 is used to realize the electrical connection between the first segment 401 and the second segment 402. Wherein, the insulating part 4032 is located on the side surface of the conductive part 4031 facing the bottom plate 203 and abuts against at least part of the plurality of battery monomers 10 away from the surface of the bottom plate 203.

[0104] The third segment 403 of the electrical connecting member 40 includes a conductive part 4031 and an insulating part 4032 along the height direction X of the box 20, which means that along the height direction X of the box 20, the electrical connecting member 40 includes the conductive part 4031 and the insulating part 4032 arranged in layers.

[0105] The first segment 401 and the second segment 402 are electrically connected through the conductive part 4031, and the first segment 401, the second segment 402 and the conductive part 4031 can be integrally formed. In some embodiments, the material of the conductive part 4031 includes conductive metals such as copper and aluminum.

[0106] The insulating part 4032 is arranged on the side surface of the conductive part 4031 facing the battery monomer, and is made of insulating material. The insulating part 4032 can be connected with the conductive part 4031 in any feasible way, such as clamping, bonding and the like; or it can be simply clamped between the conductive part 4031 and the battery monomer 10 in a contact manner.

[0107] In some embodiments, the insulating part 4032 can be part of an insulating sleeve sleeved on the outer periphery of the conductive part 4031.

[0108] In some embodiments, the electrical connector 40 can be used to realize the function of the composite pressing strip. By integrating the insulating part 4032 and the conductive part 4031 together before the material is delivered, on the one hand, the assembly time can be reduced, and on the other hand, the electrical connector 40 replaces the composite pressing strip to limit the battery monomer 10, which can reduce the number of composite pressing strips. Among them, the composite pressing strip is a component used to press the battery monomer 10 to improve the main frequency reduction of the battery device 100 under the excitation of vibration and the failure of the device in the battery device 100.

[0109] By including the conductive part 4031 and the insulating part 4032 along the height direction X of the box body 20 of the third section 403 of the electrical connector 40, the electrical connection between the first section 401 and the second section 402 is realized by the conductive part 4031, the main frequency of the battery device 100 is improved by the insulating part 4032 and the conductive part 4031 abutting away from the surface of at least part of the plurality of battery monomers 10 from the bottom plate 203, and the insulation between the battery monomer 10 and the conductive part 4031 is realized by the insulating part 4032.

[0110] According to some embodiments of the present application, the insulating part 4032 is made of an elastic material.

[0111] The elastic material refers to a material that will undergo elastic deformation when subjected to force, and will restore or partially restore the original shape after the applied force is removed. The elastic material can include one or more of rubber, polyurethane, etc.

[0112] By making the insulating part 4032 of an elastic material, the vibration impact of the battery monomer 10 can be absorbed to some extent, which not only can alleviate the vibration of the battery device 100 when subjected to vibration excitation, improve the main frequency of the battery device 100, but also can improve the service life of the electrical connector 40.

[0113] According to some embodiments of the present application, the insulating part 4032 is a molded plate.

[0114] The molded plate is a plate material manufactured by a high-temperature and high-pressure mold forming process. In some embodiments, the molded plate is made by a molding process.

[0115] In some embodiments, a U-shaped composite pressing strip is used to press the battery monomer 10 to improve the main frequency of the battery. However, when the U-shaped composite pressing strip is made by an extrusion forming process, the width of the composite pressing strip cannot be too wide, the thickness cannot be too thin, the yield is low, and the material utilization rate is low. In addition, in the height direction X of the box body 20, the composite pressing strip occupies a large space.

[0116] Compared with the above, the use of the molded plate as the insulation part 4032 can reduce the requirement for the molding shape of the insulation part 4032, improve the process efficiency, and improve the material utilization. In addition, the thickness of the insulation part 4032 can be thin and match the shape of the conductive part 4031, which is beneficial to reduce the space occupied by the insulation part 4032 in the height direction X of the box body 20.

[0117] By setting the insulation part 4032 as a molded plate, the main frequency of the battery device 100 can be improved while the manufacturing efficiency of the battery device 100 is improved, and the space occupied by the insulation part 4032 in the height direction X of the box body 20 is reduced.

[0118] Please continue to refer to Figure 5 According to some embodiments of the present application, the third segment 403 of the electrical connector 40 further comprises a first adhesive layer 4033, and the insulation part 4032 is bonded to the conductive part 4031 through the first adhesive layer 4033.

[0119] The first adhesive layer 4033 is a glue layer for bonding the insulation part 4032 and the conductive part 4031. In some embodiments, the first adhesive layer 4033 comprises double-sided adhesive tape.

[0120] In some embodiments, the surface of the insulation part 4032 can have the same roughness and surface energy as the surface of the composite strip, so that the insulation part 4032 and the conductive part 4031 have stable bonding performance, and the probability of delamination between the insulation part 4032 and the conductive part 4031 is reduced.

[0121] By bonding the insulation part 4032 and the conductive part 4031 through the first adhesive layer 4033, the line installation of the insulation part 4032 and the conductive part 4031 can be facilitated, the manufacturing process is simplified, and the insulation part 4032 and the conductive part 4031 are designed as a whole.

[0122] Please continue to refer to Figures 4-8 According to some embodiments of the present application, the battery device 100 further comprises a second adhesive layer 50. The insulation part 4032 is bonded to the surface of at least part of the plurality of battery monomers 10 away from the bottom plate 203 through the second adhesive layer 50.

[0123] The second adhesive layer 50 is a glue layer for bonding the insulation part 4032 and at least part of the plurality of battery monomers 10. In some embodiments, the second adhesive layer 50 comprises structural adhesive.

[0124] The insulating portion 4032 being adhered to at least some of the plurality of battery cells 10 away from the surface of the bottom plate 203 by the second adhesive layer 50 can refer to the battery cells 10 overlapping the arrangement position of the third section 403 on the arrangement path of the third section 403 being adhered to the insulating portion 4032 by the second adhesive layer 50.

[0125] In some embodiments, the surface of the insulating portion 4032 can have the same roughness and surface energy as the surface of the composite strip to have stable adhesion between the battery cells 10 and the insulating portion 4032 and reduce the probability of delamination between the battery cells 10 and the insulating portion 4032.

[0126] The insulating portion 4032 being adhered to at least some of the plurality of battery cells 10 away from the surface of the bottom plate 203 by the second adhesive layer 50 can achieve close contact between the insulating portion 4032 and the battery cells 10 and improve the frequency stability of the battery device 100.

[0127] Please refer to Figure 2 and Figures 4-8 According to some embodiments of the present application, the thickness dimension T of the conductive portion 4031 is less than the width dimension W of the conductive portion 4031.

[0128] The thickness dimension T of the conductive portion 4031 refers to the dimension of the conductive portion 4031 in the height direction X of the box 20. The width dimension W of the conductive portion 4031 refers to the dimension of the conductive portion 4031 in the direction perpendicular to the thickness direction of the conductive portion 4031 and perpendicular to the length direction of the third section 403. The length direction of the third section 403 refers to the extension direction of the straight line connecting the first section 401 and the second section 402.

[0129] The thickness dimension T of the conductive portion 4031 being less than the width dimension W of the conductive portion 4031 indicates that the conductive portion 4031 can be shaped into a flat cross-sectional form with a wide and thin shape.

[0130] In some embodiments, the cross-sectional shape of the conductive portion 4031 can be rectangular or racetrack-shaped.

[0131] By making the thickness dimension T of the conductive portion 4031 less than the width dimension W of the conductive portion 4031, the contact area of the electrical connector 40 and the battery cells 10 can be increased, and the space occupied by the conductive portion 4031 in the height direction X of the box 20 can be reduced, which is beneficial to improving the energy density of the battery device 100.

[0132] Please refer to Figure 2 and Figures 4-8 According to some embodiments of the present application, the thickness dimension T of the conductive portion 4031 and the width dimension W of the conductive portion 4031 satisfy: 5≤W / T≤50.

[0133] In some embodiments, the ratio of the width dimension W of the conductive portion 4031 to the thickness dimension T of the conductive portion 4031 is equal to 5, 8, 10, 12, 15, 18, 20, 25, 30, 35, 40, 45, 48, or 50.

[0134] On the basis of ensuring that the cross section of the conductive portion 4031 meets the overcurrent requirement, the greater the ratio of the width dimension W of the conductive portion 4031 to the thickness dimension T of the conductive portion 4031, the greater the surface area possessed by the conductive portion 4031, and the better the heat dissipation of the conductive portion 4031. When overcurrent flows through the conductive portion 4031, the better the heat dissipation of the conductive portion 4031, the slower the temperature rise of the conductive portion 4031, and the slower the aging or fusing speed of the conductive portion 4031.

[0135] In some embodiments, in order to make the conductive portion 4031 have better overcurrent carrying capacity and heat dissipation capacity, the ratio of the width dimension W of the conductive portion 4031 to the thickness dimension T of the conductive portion 4031 is greater than or equal to 15.

[0136] By making the thickness dimension T of the conductive portion 4031 and the width dimension W of the conductive portion 4031 satisfy 5≤W / T≤50, the conductive portion 4031 reduces the space it occupies in the height direction X while providing sufficient overcurrent area, so that the structural arrangement of the battery device 100 is more compact, and the energy density of the battery device 100 is improved.

[0137] According to some embodiments of the present application, the thickness dimension T of the conductive portion 4031 satisfies: 0

[0138] Please continue to refer to Figure 2 and Figures 4-8 In some embodiments, the thickness dimension T of the conductive portion 4031 satisfies T≤10mm. For example, the thickness dimension T of the conductive portion 4031 is equal to 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, or 9mm.

[0139] It can be understood that the greater the thickness of the conductive portion 4031, the greater the space occupied by the conductive portion 4031 in the height direction X along the box body 20, and the greater the impact on the energy density of the battery device 100. Therefore, in order to improve the energy density of the battery device 100, the thickness dimension T of the conductive portion 4031 can satisfy: 0

[0140] In some embodiments, the thickness dimension T of the conductive portion 4031 is equal to 0.1 millimeter (mm), 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.25 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.85 mm, 1.9 mm, 1.95 mm, or 2 mm.

[0141] By satisfying the thickness dimension T of the conductive portion 4031 as 0 < T ≤ 2 mm, the space occupied by the conductive portion 4031 in the height direction X of the case 20 is reduced, and the energy density of the battery device 100 is improved.

[0142] Please refer to Figure 2 and Figures 4-8 According to some embodiments of the present application, the width dimension W of the conductive portion 4031 satisfies 30 mm ≤ W ≤ 100 mm.

[0143] The larger the ratio of the width dimension W of the conductive portion 4031 to the thickness dimension T of the conductive portion 4031, the stronger the heat dissipation capability of the conductive portion 4031. Thus, the width dimension W of the conductive portion 4031 is positively correlated with the heat dissipation capability of the conductive portion 4031. In order to make the conductive portion 4031 have better heat dissipation capability, the width dimension W of the conductive portion 4031 can satisfy 30 mm ≤ T ≤ 100 mm.

[0144] In some embodiments, the width dimension W of the conductive portion 4031 is equal to 30 millimeters, 32 millimeters, 35 millimeters, 40 millimeters, 45 millimeters, 50 millimeters, 55 millimeters, 60 millimeters, 65 millimeters, 70 millimeters, 80 millimeters, 85 millimeters, 90 millimeters, 95 millimeters, 98 millimeters, or 100 millimeters.

[0145] By satisfying the width dimension W of the conductive portion 4031 as 30 mm ≤ T ≤ 100 mm, the conductive portion 4031 has better heat dissipation capability, and the contact area with the battery monomer 10 is increased.

[0146] Please refer to Figure 2 and Figures 4-8 According to some embodiments of the present application, the plurality of battery monomers 10 includes a plurality of groups of battery monomers arranged side by side along the first direction Z, and each group of battery monomers includes at least one battery monomer 10 stacked along the second direction Y. In the projection plane perpendicular to the height direction X of the case 20, the orthographic projection of the electrical connector 40 partially overlaps with the orthographic projection of two adjacent groups of battery monomers.

[0147] The first direction Z can refer to a length direction of the first beam 202. The first direction Z can also refer to a length direction of the battery cell 10. The second direction Y can refer to a thickness direction of the battery cell 10. The second direction Y can also refer to a length direction of the electrical connector 40.

[0148] The plurality of battery cells 10 includes a plurality of groups of battery cells arranged side by side along the first direction Z. Each group of battery cells includes at least one battery cell 10 stacked along the second direction Y. This means that each group of battery cells has at least one battery cell stacked along the second direction Y.

[0149] The projection plane perpendicular to the height direction X of the box 20 can be a plane parallel to the surface of the bottom plate 203 facing the plurality of battery cells 10. In the projection plane perpendicular to the height direction X of the box 20, the orthographic projection of the electrical connector 40 overlaps the orthographic projection of the battery cells 10 of two adjacent groups of battery cells at the same time. This means that the electrical connector 40 can contact the battery cells 10 of two adjacent groups of battery cells at the same time. The more battery cells 10 contacted by the electrical connector 40, the more battery cells 10 that can be restricted from displacement along the height direction X of the box 20, thereby facilitating an increase in the frequency of the battery device 100.

[0150] In some embodiments, the electrical connector 40 can contact the shoulder portions of the battery cells 10 of two adjacent groups of battery cells at the same time. For example, the battery cell 10 includes a first electrode terminal and a second electrode terminal arranged on the end cap 1012. The portion of the end cap 1012 corresponding to the first electrode terminal and the second electrode terminal forms a first portion. The portion of the end cap 1012 corresponding to the first electrode terminal away from the second electrode terminal or the portion of the top cap corresponding to the second electrode terminal away from the first electrode terminal forms a second portion. The shoulder portion of the battery cell 10 corresponds to the second portion. The second portions of the battery cells 10 of two adjacent groups of battery cells are adjacent along the first direction Z. The electrical connector 40 contacts the second portions of the battery cells 10 of two adjacent groups of battery cells at the same time.

[0151] In some embodiments, the battery device 100 further includes a plurality of connection pieces 60. Each connection piece 60 is electrically connected to the electrode terminals 103 of two adjacent battery cells 10. In the projection plane perpendicular to the height direction X of the box 20, the orthographic projection of the electrical connector 40 is completely offset from the orthographic projection of the connection pieces 60. In this way, the probability of direct electrical connection between the electrical connector 40 and the plurality of electrode terminals 103 is reduced.

[0152] The connection piece 60 is a connector for realizing series and parallel connection of the plurality of battery cells 10. In some embodiments, the connection piece 60 can be an aluminum piece or a copper piece, etc.

[0153] The electrode terminal 103 is used to electrically connect the electrode assembly 102 inside the shell assembly 101 with external electrical devices outside the shell assembly 101. The electrode terminal 103 can be arranged on the shell assembly 101. The electrode terminal 103 can include a first electrode terminal and a second electrode terminal, and the electrode assembly 102 includes a positive electrode tab and a negative electrode tab, the positive electrode tab is electrically connected with the first electrode terminal, and the negative electrode tab is electrically connected with the second electrode terminal. The positive electrode tab refers to a metal conductor that leads out the positive electrode from the electrode assembly 102, and the negative electrode tab refers to a metal conductor that leads out the negative electrode from the electrode assembly 102. The first electrode terminal 103 can form a positive electrode of the battery monomer 10, and the second electrode terminal 103 can form a negative electrode of the battery monomer 10. In some embodiments, the first electrode terminal 103 can be made of aluminum or aluminum alloy, and the second electrode terminal 103 can be made of copper or copper alloy.

[0154] In some embodiments, the electrode terminal 103 is arranged towards the side where the electrical connector 40 is located. In some embodiments, the first electrode terminals and the second electrode terminals of the plurality of battery monomers 10 in the same battery monomer group are arranged alternately along the second direction. For example, the first electrode terminals of the odd-numbered battery monomers 10 and the second electrode terminals of the even-numbered battery monomers 10 in the same battery monomer group are adjacent along the second direction, and the first electrode terminals of the even-numbered battery monomers 10 and the second electrode terminals of the odd-numbered battery monomers 10 in the same battery monomer group are adjacent along the second direction. The connecting piece 60 can electrically connect the first electrode terminals and the second electrode terminals adjacent along the second direction to achieve electrical connection of the plurality of battery monomers 10. The electrical connection of the plurality of battery monomers 10 eventually forms a total positive output electrode and a total negative output electrode, and the total positive output electrode and the junction box can be connected by an electrical connector, and the total negative output electrode and the junction box can be connected by another electrical connector. That is, the battery device 100 can include at least two electrical connectors, one of the two electrical connectors is used to achieve electrical connection between the total positive output electrode and the junction box, and the other of the two electrical connectors is used to achieve electrical connection between the total negative output electrode and the junction box.

[0155] In the projection plane perpendicular to the height direction X of the box body 20, the orthographic projection of the electrical connector 40 is completely staggered with the orthographic projection of the connecting piece 60, which means that the orthographic projection of the electrical connector 40 does not overlap with the orthographic projection of the connecting piece 60 in the projection plane perpendicular to the height direction X of the box body 20.

[0156] In some embodiments, in order to reduce the probability of direct electrical connection between the conductive part 4031 and the plurality of electrode terminals 103, the sum of the thicknesses of the second adhesive layer 50 and the insulating part 4032 can be greater than the thickness of the electrode terminal 103.

[0157] In some embodiments, to reduce the probability of direct electrical connection between the conductive part 4031 and the plurality of electrode terminals 103, the outer surface of the conductive part 4031 can be provided with an insulating layer.

[0158] By making the front projection of the electrical connector 40 overlap the front projection of two adjacent groups of battery cells in the projection plane perpendicular to the height direction X of the box 20, the main frequency of the battery device 100 can be improved.

[0159] Please continue to refer to Figures 6-8 According to some embodiments of the present application, the battery device 100 further comprises an upper cover 70, the upper cover 70 covers the box 20, and the upper cover 70 comprises a protruding part 701 protruding towards the bottom plate 203, the protruding part 701 abuts against the side surface of the third section 403 of the electrical connector 40 away from the bottom plate 203.

[0160] Please continue to refer to Figure 2 and Figures 4-10 According to some embodiments of the present application, the electrical connector 40 further comprises a buffer part 4034 located on the side of the conductive part 4031 of the third section 403 away from the bottom plate 203, and the conductive part 4031 abuts against the protruding part 701 through the buffer part 4034.

[0161] The buffer part 4034 located on the side of the conductive part 4031 of the third section 403 away from the bottom plate 203 means that the buffer part 4034 is provided between the protruding part 701 and the conductive part 4031. The conductive part 4031 abuts against the protruding part 701 through the buffer part 4034 means that the conductive part 4031 is compressed with the protruding part 701 through the buffer part 4034.

[0162] In some embodiments, the material of the buffer part 4034 can be foam.

[0163] The conductive part 4031 abuts against the protruding part 701 through the buffer part 4034, which can realize the buffering and fixing between the conductive part 4031 and the protruding part 701, absorb external impact, improve the compression reliability between the conductive part 4031 and the protruding part 701, and reduce the risk of component failure caused by resonance.

[0164] Please continue to refer to Figure 2 According to some embodiments of the present application, the frame 201 and the first beam 202 are further used to define a second accommodating cavity 20B, and the second accommodating cavity 20B is used to accommodate a junction box.

[0165] The second accommodating cavity 20B is a space for accommodating a junction box, and the second accommodating cavity 20B is located on one side of the first accommodating cavity 20A.

[0166] In some embodiments, the first accommodating cavity 20A and the second accommodating cavity 20B are arranged along the length direction of the electric connecting piece 40. In some embodiments, the orthographic projection of the second accommodating cavity 20B in the projection plane perpendicular to the box 20 is rectangular.

[0167] In some embodiments, the first accommodating cavity 20A and the second accommodating cavity 20B can share the same first beam 202 or the same frame 201.

[0168] Please continue to refer to Figure 2 and Figures 4-12 In some embodiments, the second section of the electric connecting piece 40 is electrically connected with the electric connecting terminal 30 through the adapter 80. The frame 201 and the first beam 202 further define a third accommodating cavity for accommodating the adapter 80.

[0169] In some embodiments, the adapter 80 includes a first adapter 801 and a second adapter 802 electrically connected with each other. The first adapter 801 includes a first hole H1 for the second section 402 to pass through and a second hole H2 for a first connecting end 8021 of the second adapter 802 to pass through, so as to realize the electrical connection between the second adapter 802 and the second section 402 of the electric connecting piece 40 through the first adapter 801. A second connecting end 8022 of the second adapter 802 is arranged towards the position where the electric connecting terminal 30 is located and is electrically connected with the electric connecting terminal 30.

[0170] In some embodiments, the second accommodating cavity 20B and the third accommodating cavity are arranged on opposite sides of the first accommodating cavity 20A along the length direction of the electric connecting piece 40.

[0171] By accommodating the terminal box in the second accommodating cavity 20B, the terminal box can be integrated in the battery device 100, and the integration degree of the battery device 100 can be improved.

[0172] The embodiments of the present application provide a power utilization device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used for providing electric energy.

[0173] The power utilization device can include a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc.

[0174] In some embodiments, the power consuming device is a new energy electric vehicle. The new energy electric vehicle has front drive and rear drive requirements. Therefore, the electric connection terminal 30 and the junction box are respectively arranged on two sides of the plurality of battery monomers 10, and the electric connection of the electric connection terminal 30 and the junction box is realized through the electric connection piece 40, so as to ensure the electric energy demand of the electric vehicle in the sudden acceleration working condition and the like. The battery device 100 will experience many working conditions (such as vibration impact working condition, high and low temperature impact working condition, cyclic charging and discharging working condition, and simulated expansion working condition) in the actual driving process. The battery device 100 described above can meet the demand of stable main frequency when experiencing the above working conditions.

[0175] It can be understood that the power consuming device provided in the application is applied to any of the above battery devices 100. Therefore, the power consuming device has all the beneficial effects of the above battery devices 100, which will not be described here.

[0176] The embodiment of the application provides a power storage device, which comprises the battery device 100 in the above embodiment, and the battery device 100 is used for storing electric energy.

[0177] The power storage device can include but is not limited to a centralized power storage device (such as a container power storage device), a distributed power storage device, a movable power storage device, a wearable power storage device and the like.

[0178] It can be understood that the power storage device provided in the application is applied to any of the above batteries. Therefore, the power storage device has all the beneficial effects of the above battery, which will not be described here.

[0179] The battery device 100 of the application will be described below in combination with a specific embodiment.

[0180] The embodiment of the application provides a battery device 100, which comprises a plurality of battery monomers 10, a box body 20, a junction box, an electric connection terminal 30, an electric connection piece 40, a second adhesive layer 50, a connecting sheet 60 and an upper cover 70.

[0181] The box body 20 comprises a frame 201, a first beam 202 connected with the frame 201 and a bottom plate 203. The frame 201 and the first beam 202 are used for defining a first accommodating cavity 20A accommodating the plurality of battery monomers 10 and a second accommodating cavity 20B accommodating the junction box. The bottom plate 203 is used for carrying the plurality of battery monomers 10, and the plurality of battery monomers 10 are electrically connected through the connecting sheet 60.

[0182] The junction box is electrically connected with the plurality of battery monomers 10, and the junction box is located on the side of the first beam 202 away from the battery monomers 10.

[0183] The electric connection terminal 30 is arranged on the frame 201, and the electric connection terminal 30 is located on the side of the first accommodating cavity 20A away from the junction box.

[0184] The two ends of the electrical connecting piece 40 are electrically connected with the junction box and the electrical connecting terminal 30 respectively. The electrical connecting piece 40 comprises a first section 401 electrically connected with the junction box, a second section 402 electrically connected with the electrical connecting terminal 30, and a third section 403 between the first section 401 and the second section 402. The third section 403 is located on the side of the first beam 202 away from the bottom plate 203.

[0185] The third section 403 comprises a conductive part 4031, a first adhesive layer 4033, an insulating part 4032, and a buffer part 4034 along the height direction X of the box body 20. The conductive part 4031 is used to realize the electrical connection between the first section 401 and the second section 402, and the thickness dimension of the conductive part 4031 is smaller than the width dimension of the conductive part 4031. The insulating part 4032 is located on the side surface of the conductive part 4031 facing the bottom plate 203, and the insulating part 4032 is adhered to the conductive part 4031 through the first adhesive layer 4033. The insulating part 4032 is adhered to the surfaces of the battery cells 10 of the two adjacent groups of battery cells away from the bottom plate 203 through the second adhesive layer 50, and in the projection plane perpendicular to the height direction X of the box body 20, the orthographic projection of the electrical connecting piece 40 is completely overlapped with the orthographic projection of the connecting piece 60 of the electrode terminal 103 of the two adjacent battery cells 10. The insulating part 4032 is a molded plate. The buffer part 4034 is located on the side of the conductive part 4031 of the third section 403 away from the bottom plate 203.

[0186] The upper cover 70 covers the box body 20, and the upper cover 70 comprises a protruding part 701 protruding towards the bottom plate 203, the protruding part 701 abuts against the side surface of the third section 403 of the electrical connecting piece 40 away from the bottom plate 203, and the protruding part 701 abuts against the conductive part 4031 through the buffer part 4034.

[0187] The battery device 100 provided by the embodiment of the present application can reduce the influence of the electrical connecting piece 40 on the connection length of the frame 201 and the first beam 202, improve the overall anti-expansion performance and main frequency stability of the battery device 100, and improve the energy density of the battery device 100.

[0188] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Multiple battery cells; the multiple battery cells include multiple groups of battery cells arranged side by side along a first direction, each group of battery cells including at least one battery cell stacked along a second direction; The housing includes a frame and a first beam connected to the frame, the frame and the first beam defining a first receiving cavity for accommodating the plurality of battery cells; A junction box, electrically connected to the plurality of battery cells, is located on the side of the first beam away from the battery cells; Electrical connection terminals are disposed on the frame and located on the side of the first receiving cavity away from the junction box; An electrical connector, the two ends of which are electrically connected to the junction box and the electrical connection terminal, respectively; as well as A top cover that fits onto the housing, the top cover including a protrusion that protrudes toward the inside of the first receiving cavity; The electrical connector is configured to bend in the height direction of the housing to pass over the first beam, and two opposing surfaces of the electrical connector along the height direction of the housing abut against at least a portion of the plurality of battery cells and the protrusion, respectively. In a projection plane perpendicular to the height of the housing, the orthographic projection of the electrical connector simultaneously overlaps with the orthographic projection portions of the two adjacent sets of battery cells, and the electrical connector simultaneously contacts the shoulder of the battery cells in the two adjacent sets of battery cells.

2. The battery device according to claim 1, characterized in that, The housing also includes a base plate connected to the frame, the base plate being used to support the plurality of battery cells; The electrical connector includes a first segment electrically connected to the junction box, a second segment electrically connected to the electrical connection terminal, and a third segment located between the first segment and the second segment; The third segment is located on the side of the first beam away from the base plate, and the third segment is in contact with the surface of at least a portion of the battery cells away from the base plate.

3. The battery device according to claim 2, characterized in that, The third segment of the electrical connector includes a conductive part and an insulating part along the height direction of the housing, and the conductive part is used to realize the electrical connection between the first segment and the second segment; The insulating portion is located on the surface of the conductive portion facing the base plate and abuts against the surface of at least a portion of the battery cells away from the base plate.

4. The battery device according to claim 3, characterized in that, The insulating part is made of an elastic material.

5. The battery device according to claim 3, characterized in that, The insulating part is a molded plate.

6. The battery device according to claim 3, characterized in that, The third segment of the electrical connector further includes a first adhesive layer, through which the insulating part is bonded to the conductive part.

7. The battery device according to claim 3, characterized in that, The battery device further includes a second adhesive layer; wherein the insulating portion is bonded to at least a portion of the battery cells away from the base plate via the second adhesive layer.

8. The battery device according to any one of claims 3 to 7, characterized in that, The thickness of the conductive part is smaller than the width of the conductive part.

9. The battery device according to any one of claims 3 to 7, characterized in that, The thickness T and width W of the conductive part satisfy the following condition: 5 ≤ W / T ≤ 50.

10. The battery device according to any one of claims 3 to 7, characterized in that, The thickness T of the conductive part satisfies: 0 < T ≤ 2 mm.

11. The battery device according to any one of claims 3 to 7, characterized in that, The width W of the conductive part satisfies: 30mm≤W≤100mm.

12. The battery device according to any one of claims 3 to 7, characterized in that, The electrical connector also includes a buffer portion located on the side of the conductive portion away from the base plate in the third segment, and the conductive portion abuts against the protrusion through the buffer portion.

13. The battery device according to any one of claims 1 to 7, characterized in that, The frame and the first beam also define a second receiving cavity for accommodating the junction box.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 13, the battery device being used to provide electrical energy.

15. An energy storage device, characterized in that, Includes the battery device as described in any one of claims 1 to 13, wherein the battery device is used to store electrical energy.

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