Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a plurality of single batteries, a confluence component and a circuit board, each single battery comprises a shell and an electrode terminal, and the electrode terminals are arranged on the shells. And the confluence component is connected to the electrode terminal and is used for realizing electric connection of the plurality of battery monomers. The circuit board is arranged on the first outer end face of the shell and comprises a main body part and a sampling part, one end of the sampling part is connected to the main body part, and the other end is connected to the confluence component or the battery monomer. Wherein at least part of the main body part and at least part of the confluence component are arranged in a stacked mode in the first direction, the first direction intersects with the first outer end face, and / or at least part of the main body part and at least part of the electrode terminal are arranged in a stacked mode in the first direction, and the first direction intersects with the first outer end face. The battery device has relatively high energy complementing efficiency.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] How to improve the energy charging efficiency of battery devices is an urgent problem to be solved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can improve the energy charging efficiency of the battery device.

[0005] In a first aspect, the present application provides a battery device, which includes a plurality of battery cells, a busbar and a circuit board, wherein the battery cells include a housing and electrode terminals, and the electrode terminals are arranged on the housing. The busbar is connected to the electrode terminals, and the busbar is used to achieve electrical connection of the plurality of battery cells. The circuit board is arranged on the first outer end face of the housing, and the circuit board includes a main body and a sampling part, one end of the sampling part is connected to the main body, and the other end is connected to the busbar or the battery cell. Wherein, at least part of the main body and at least part of the busbar are stacked along a first direction, and the first direction intersects with the first outer end face, and / or, at least part of the main body and at least part of the electrode terminals are stacked along a first direction, and the first direction intersects with the first outer end face.

[0006] In the above technical solution, due to the limited area of ​​the first outer end surface, when the main body and the current collector and / or electrode terminals are stacked in the first direction, it is advantageous to arrange a larger current collector on the first outer end surface, thereby improving the current carrying capacity of the current collector. Alternatively, larger electrode terminals can be arranged in a direction parallel to the first outer end surface, thereby improving the current carrying capacity of the electrode terminals. In some embodiments, it is also advantageous to increase the size of both the current collector and the electrode terminals simultaneously to improve the current carrying capacity between the electrode terminals and the current collector, thereby improving the battery device's energy recharge efficiency. Furthermore, larger electrode terminals and / or current collectors also help improve the stability of the connection between them.

[0007] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface. The first electrode terminal and the second electrode terminal are spaced apart along a second direction, the second direction intersecting the first direction, and a maximum distance between the first electrode terminal and the second electrode terminal along the second direction is less than a maximum dimension of the main body along the second direction.

[0008] In the above embodiment, because the maximum distance between the first and second electrode terminals along the second direction is less than the maximum dimension of the main body along the second direction, the main body can at least partially overlap with at least one of the first and second electrode terminals in the first direction. This allows the distance between the first and second electrode terminals on the first outer end surface to be reduced, allowing for relatively larger first and second electrode terminals, thereby providing the battery device with a stronger current carrying capacity. When the distance between the first and second electrode terminals on the first outer end surface is reduced, the main body's dimensions remain unchanged because the main body can at least partially overlap with at least one of the first and second electrode terminals in the first direction.

[0009] In one or more embodiments of the first aspect, a maximum distance between two farthest points of an outer contour of the first electrode terminal and an outer contour of the second electrode terminal in the second direction is greater than or equal to a maximum dimension of the circuit board along the second direction.

[0010] In the above solution, since the maximum distance between the two farthest points of the outer contour of the first electrode terminal and the outer contour of the second electrode terminal in the second direction is greater than or equal to the maximum size of the circuit board along the second direction, it is convenient for the circuit board to connect to the electrode terminals for signal sampling by setting a connecting portion on the edge of its own width direction.

[0011] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface, and the first electrode terminal and the second electrode terminal are at least partially stacked with the main body along the first direction.

[0012] In the above solution, because at least a portion of the first and second electrode terminals are stacked with the main body along the first direction, the outer end surfaces of the first and second electrode terminals in the height direction can be used to arrange the main body, which helps expand the space for circuit board layout and increase the width of the main body. Alternatively, if the space on the first outer end surface is limited, the distance between the first and second electrode terminals can be reduced without affecting the size of the main body.

[0013] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface, the first electrode terminal and the second electrode terminal are arranged at intervals along the second direction, and the circuit board includes a plurality of sampling portions, at least one of which protrudes from an edge of the main body on one side along the second direction and is completely stacked with the busbar component along the first direction.

[0014] In the above solution, the sampling portion can be stacked with the busbar component along the first direction, so that the sampling portion does not occupy the dimensional space of the first outer end surface along the second direction alone. The dimensional space of the first outer end surface along the second direction can be used to increase the size of the busbar component along the second direction to improve the flow capacity between the busbar component and the electrode terminal.

[0015] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface. The busbar includes a first busbar and a second busbar, the first busbar being configured to connect to the first electrode terminal, the second busbar being configured to connect to the second electrode terminal, the first busbar and the second busbar being spaced apart along the second direction, and a maximum distance between the first busbar and the second busbar along the second direction being less than a maximum dimension of the main body along the second direction.

[0016] In the above embodiment, because the main body can partially overlap with at least one of the first and second current-collecting members along the second direction, the spacing between the first and second current-collecting members along the second direction can be reduced, such that the maximum distance between the first and second current-collecting members along the second direction is less than the maximum dimension of the main body along the second direction. This allows the size of at least one of the first or second current-collecting members to be relatively large, resulting in a stronger current-carrying capacity, which in turn improves the battery device's energy-recharging efficiency.

[0017] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface, and the busbar component includes a first busbar component and a second busbar component, the first busbar component is used to connect the first electrode terminal, and the second busbar component is used to connect the second electrode terminal, and the first busbar component and the second busbar component are at least partially stacked with the main body along the first direction.

[0018] In the above scheme, since the first confluence component and the second confluence component are at least partially stacked with the main body along the first direction, the first confluence component, the second confluence component and the main body do not need to be arranged in sequence along the second direction, so that the distance between the first confluence component and the second confluence component along the second direction can be shortened, and more space on the first outer end surface can be used to increase the size of the first confluence component and the second confluence component, so that the flow capacity of the confluence component can be improved.

[0019] In one or more embodiments of the first aspect, the current collecting component is at least partially folded along a second direction to form a multi-layer stacked structure, and the second direction intersects with the first direction.

[0020] In the above solution, since the flow-collecting component is at least partially folded along the second direction to form a multi-layer stacked structure, it is beneficial to improve the flow capacity of the flow-collecting component while occupying a smaller space in the second direction.

[0021] In one or more embodiments of the first aspect, the circuit board includes a plurality of main bodies stacked along a first direction. At least one of the plurality of main bodies is stacked with at least a portion of the current collecting component along the first direction, and / or at least one of the plurality of main bodies is stacked with at least a portion of the electrode terminals along the first direction.

[0022] In the above solution, when space along the second direction on the first outer end surface is limited, in order to accommodate a large number of sampling units while achieving a higher circuit density on the circuit board, the circuit board can be configured to include multiple main bodies stacked along the first direction. In this case, at least one of the multiple main bodies is stacked with at least a portion of the current busbar along the first direction, and / or at least one of the multiple main bodies is stacked with at least a portion of the electrode terminals along the first direction. This advantageously prevents portions of the main bodies from sharing space with the current busbar and / or the electrode terminals in a direction parallel to the first outer end surface, thereby allowing for the arrangement of a larger current busbar and / or electrode terminals, and thus providing the battery device with a higher current carrying capacity.

[0023] In one or more embodiments of the first aspect, at least a portion of the circuit board is located between the current busbar component and the first outer end surface.

[0024] In the above scheme, since at least part of the circuit board is located between the busbar component and the first outer end surface, part of the circuit board can be arranged in the gap formed between the busbar component and the first outer end surface along the first direction, so that the space in the gap is utilized. While setting a larger busbar component to improve the current flow capacity of the battery device, it is also beneficial to improve the energy density of the battery device.

[0025] In one or more embodiments of the first aspect, the main body portion and / or the sampling portion of the circuit board is located between the current confluence component and the first outer end surface.

[0026] In the above solution, the main body and / or the sampling portion can be arranged between the confluence component and the first outer end surface so that the gap formed between the confluence component and the first outer end surface can be utilized, thereby making the battery device have a higher energy density.

[0027] In one or more embodiments of the first aspect, the circuit board further includes a temperature measuring component connected to at least one sampling line of the circuit board, and the temperature measuring component is at least partially disposed on a surface of the circuit board facing the first outer end surface.

[0028] In the above scheme, since the temperature measuring component usually has a certain thickness, at least a portion of the temperature measuring component can be set on the surface of the circuit board facing the first outer end surface, and the space between the circuit board and the first outer end surface can be used to accommodate the temperature measuring component, which is beneficial to improving space utilization and increasing the energy density of the battery device.

[0029] In one or more embodiments of the first aspect, the circuit board includes a signal lead-out plug, and the signal lead-out plug is connected to the sampling line on the circuit board on a surface of the circuit board facing the first outer end surface.

[0030] In the above solution, since the signal lead-out plug usually has a certain thickness, by setting at least a portion of the signal lead-out plug on the surface of the circuit board facing the first outer end surface, the space between the circuit board and the first outer end surface can be used to accommodate the signal lead-out plug, which is beneficial to improving space utilization and increasing the energy density of the battery device.

[0031] In one or more embodiments of the first aspect, the sampling portion includes a pad connected to the current collecting component.

[0032] In the above solution, compared with the method in which the sampling portion is connected to the busbar component through an adapter stacked with the main body along the first direction, the sampling portion is directly connected to the busbar component through the solder pad, which can reduce the space occupied by the circuit board in the first direction, thereby improving the energy density of the battery device.

[0033] In one or more embodiments of the first aspect, the multi-layer stacked structure includes a first busbar layer and a second busbar layer, the first busbar layer is connected to the electrode terminal and forms a connection area, the second busbar layer includes an avoidance through-hole, and the avoidance through-hole is at least partially arranged corresponding to the connection area along the first direction, and the second busbar layer is located on the side of the first busbar layer away from the first outer end face.

[0034] In the above scheme, the arrangement of the first busbar layer and the second busbar layer can enable the busbar component to have a larger flow cross-sectional area. In the multi-layer stacked structure, it is only necessary to connect the first busbar layer and the electrode terminal to achieve electrical connection between the busbar component and the electrode terminal. At the same time, since the second busbar layer includes avoidance through holes arranged corresponding to the connection area, the connection between the first busbar layer and the electrode terminal can be carried out at the position of the avoidance through holes, which can reduce the difficulty of welding the multi-layer stacked structure and the electrode terminal and enable the busbar component to have a higher flow capacity.

[0035] In one or more embodiments of the first aspect, the multi-layer stacked structure includes a first busbar layer and a second busbar layer, the first busbar layer is connected to the electrode terminal and forms a connection area, the second busbar layer includes an avoidance through-hole, and the avoidance through-hole is at least partially arranged corresponding to the connection area along the first direction, and the sampling portion is connected to the area on the first busbar layer corresponding to the avoidance through-hole along the first direction.

[0036] In the above solution, in the first direction, the sampling portion can share part of the space with the second busbar layer, which is beneficial to improving the energy density of the battery device.

[0037] In one or more embodiments of the first aspect, the dimension of the battery cell along the second direction is smaller than the dimension along the first direction and larger than the dimension along the third direction, the first direction, the second direction, and the third direction are perpendicular to each other, the electrode terminal includes a first electrode terminal located on the first outer end surface, and the busbar component includes a first busbar component connected to the first electrode terminal. The circuit board is connected to the first electrode terminal and / or the first busbar component. The maximum distance between the first electrode terminal and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction, and / or the maximum distance between the first busbar component and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction.

[0038] In the above scheme, since the maximum distance between the first electrode terminal and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction, and / or the maximum distance between the first busbar component and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction; a first electrode terminal of a relatively large size can be arranged on the first outer end surface without affecting the arrangement of the circuit board, and the circuit board can at least partially overlap with at least one of the first busbar component or the first electrode terminal along the first direction, so that the battery device has a higher energy replenishment efficiency.

[0039] In one or more embodiments of the first aspect, the battery cells include a second outer end surface intersecting the first outer end surface, and the multiple battery cells are stacked along a third direction perpendicular to the second outer end surface. The electrode terminal is located on the second outer end surface, and the current collector includes a first connecting section and a second connecting section, the first connecting section connected to the electrode terminal, and the second connecting section connected to the circuit board, the first connecting section and the second connecting section intersecting and connected at an angle. At least a portion of the main body and at least a portion of the second connecting section are stacked along the first direction.

[0040] In the above scheme, multiple battery cells are stacked along the third direction, and adjacent battery cells can be electrically connected through the first connecting section and the second connecting section. Since the first outer end surface of at least one battery cell among the multiple battery cells faces another battery cell, it is not convenient for the circuit board to be connected to the first connecting section located on the first outer end surface. Therefore, the circuit board can be electrically connected to the second connecting section on the first outer end surfaces of the multiple battery cells for sampling; so that the main body and at least part of the second connecting section are stacked along the first direction, which is conducive to using more space on the first outer end surface along the second direction to increase the size of the second connecting section along the second direction, so as to improve the current flow capacity of the first confluence component.

[0041] In one or more embodiments of the first aspect, the main body is located on a side of the second connecting section away from the first outer end surface.

[0042] In the above solution, by arranging the main body on the side of the second connecting section away from the first outer end surface, when multiple battery cells are arranged along the third direction, the circuit board can be more easily connected to the second connecting sections of multiple battery cells for sampling.

[0043] In one or more embodiments of the first aspect, the maximum distance between the second connecting section and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction, and the second direction, the first direction and the third direction are perpendicular to each other.

[0044] In the above scheme, by setting the maximum distance between the second connecting section and the edge of the first outer end face along the second direction to be smaller than the maximum size of the main body along the second direction, part of the circuit board and the second connecting section can be stacked along the first direction, and then more space on the first outer end face along the second direction can be used to increase the size of the second connecting section along the second direction, which can increase the flow cross-sectional area of ​​the confluence component and improve the flow capacity of the confluence component.

[0045] In one or more embodiments of the first aspect, the busbar component is connected to the electrode terminal to form a weld mark, and in the same projection plane perpendicular to the first direction, the orthographic projection of the main body and the orthographic projection of the weld mark are misaligned.

[0046] In the above scheme, in the same projection plane perpendicular to the first direction, the orthographic projection of the main body and the orthographic projection of the weld mark are misaligned, so the busbar component and the circuit board can be assembled and combined first, and the area where the busbar component and the electrode terminal need to form the weld mark is reserved during assembly. Then the combined busbar component and circuit board are assembled and welded together with the battery cell, which is conducive to speeding up the assembly rhythm of the circuit board, busbar component and battery cell.

[0047] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface, the first electrode terminal and the second electrode terminal are arranged at intervals along the second direction, the second direction intersects with the first direction, the busbar component includes a first busbar component and a second busbar component, the first busbar component is connected to the first electrode terminal to form a first weld mark, and the second busbar component is connected to the second electrode terminal to form a second weld mark; along the second direction, the main body is located between the first weld mark and the second weld mark.

[0048] In the above scheme, along the second direction, the main body is located between the first weld mark and the second weld mark. The busbar component and the circuit board can be assembled and combined first. During assembly, an area where the busbar component and the electrode terminal need to form a weld mark is reserved. Then the combined busbar component and circuit board are assembled and welded together with the battery cell, which is conducive to speeding up the assembly rhythm of the circuit board, busbar component and battery cell.

[0049] In one or more embodiments of the first aspect, the second direction and the third direction are parallel to the first outer end surface, the maximum dimension of the first outer end surface along the second direction is greater than the maximum dimension of the first outer end surface along the third direction, the electrode terminal includes a first electrode terminal located on the first outer end surface, the busbar includes a first busbar, and the first busbar is connected to the first electrode terminal to form a first weld mark. Along the second direction, the main body is located between the first weld mark and an edge of the first outer end surface.

[0050] In the above scheme, since the main body is located between the first weld mark and the edge of the first outer end face along the second direction, the busbar component and the circuit board can be assembled and combined first, and the area where the busbar component and the electrode terminal need to form the weld mark is reserved during assembly. The combined busbar component and circuit board are then assembled and welded together with the battery cell, which is conducive to speeding up the assembly rhythm of the circuit board, busbar component and battery cell.

[0051] In one or more embodiments of the first aspect, the busbar assembly includes a positioning hole, the electrode terminal includes a positioning groove, the positioning hole and the positioning groove are opposite each other along a through-going direction of the positioning hole, and an orthographic projection of the main body is misaligned with the positioning hole within a same projection plane perpendicular to the first direction.

[0052] In the above scheme, since the orthographic projection of the main body is misaligned with the positioning hole in the same projection plane perpendicular to the first direction, the busbar component and the circuit board can be assembled and combined first. During assembly, the positioning holes on the busbar component used for positioning with the electrode terminals are not blocked by the circuit board. The combined busbar component and the circuit board are then positioned and fixed together with the battery cell. At this time, they can be quickly assembled according to the alignment of the positioning holes and the positioning grooves along the first direction, which is conducive to speeding up the assembly rhythm of the circuit board, the busbar component and the battery cell.

[0053] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on a first outer end surface, the first electrode terminal and the second electrode terminal being spaced apart along a second direction, the second direction intersecting the first direction. The positioning groove includes a first positioning groove located on the first electrode terminal and a second positioning groove located on the second electrode terminal, and the main body is located between the first positioning groove and the second positioning groove along the second direction.

[0054] In the above scheme, since the main body is located between the first positioning groove and the second positioning groove along the second direction, the busbar component and the circuit board can be assembled and combined first. During assembly, the positioning holes on the busbar component used for positioning with the electrode terminals are not blocked by the circuit board. The combined busbar component and the circuit board are then positioned and fixed together with the battery cell. At this time, the first positioning groove and the positioning hole opposite to it can be aligned along the first direction, and the second positioning groove and the positioning hole opposite to it can be aligned along the first direction for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board, the busbar component and the battery cell.

[0055] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located on a first outer end surface, the first electrode terminal and the second electrode terminal being spaced apart along a second direction, the second direction intersecting the first direction. The busbar assembly includes a first busbar assembly connected to the first electrode terminal and a second busbar assembly connected to the second electrode terminal. The positioning holes include a first positioning hole located on the first busbar assembly and a second positioning hole located on the second busbar assembly, with the main body located between the first positioning hole and the second positioning hole along the second direction.

[0056] In the above scheme, since the main body is located between the first positioning hole and the second positioning hole along the second direction, the busbar component and the circuit board can be assembled first, and the first positioning hole and the second positioning hole are not blocked by the circuit board during assembly. The assembled busbar component and the circuit board are then positioned and fixed together with the battery cell. At this time, the first positioning hole and the positioning groove opposite to it can be aligned along the first direction, and the second positioning hole and the positioning groove opposite to it can be aligned along the first direction for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board, the busbar component and the battery cell.

[0057] In one or more embodiments of the first aspect, the second direction and the third direction are parallel to the first outer end surface, the maximum dimension of the first outer end surface along the second direction is greater than the maximum dimension of the first outer end surface along the third direction, the battery cell includes a first electrode terminal located on the first outer end surface, the positioning groove includes a first positioning groove located on the first electrode terminal, and the main body is located between the first positioning groove and an edge of the first outer end surface along the second direction.

[0058] In the above scheme, since the main body is located between the first positioning groove and the edge of the first outer end face along the second direction, the busbar component and the circuit board can be assembled first, and the first positioning groove is not blocked by the circuit board during assembly. The combined busbar component and circuit board are then positioned and fixed together with the battery cell. At this time, the first positioning groove and the positioning hole opposite to it can be aligned along the first direction for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board, busbar component and battery cell.

[0059] In one or more embodiments of the first aspect, the second direction and the third direction are parallel to the first outer end surface, the maximum dimension of the first outer end surface along the second direction is greater than the maximum dimension of the first outer end surface along the third direction, the battery cell includes a first electrode terminal located on the first outer end surface and a first busbar, the first busbar is connected to the first electrode terminal, the positioning hole includes a first positioning hole located on the first busbar, and along the second direction, the main body is located between the first positioning hole and an edge of the first outer end surface.

[0060] In the above scheme, since the main body is located between the first positioning hole and the edge of the first outer end face along the second direction, the busbar component and the circuit board can be assembled first, and the first positioning hole is not blocked by the circuit board during assembly. The assembled busbar component and circuit board are then positioned and fixed together with the battery cell. At this time, the first positioning hole and the positioning groove opposite to it can be aligned along the first direction for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board, busbar component and battery cell.

[0061] In a second aspect, the present application provides an electrical device, which includes the battery device in one or more of the above embodiments, and the battery device is used to provide electrical energy.

[0062] In the above solution, since the battery device in one or more of the above embodiments has a high energy replenishment efficiency, the electrical device including the battery device in one or more of the above embodiments also has a high energy replenishment efficiency.

[0063] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0065] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0066] Figure 2 An exploded view of a battery device according to some embodiments of the present application;

[0067] Figure 3 An exploded view of a battery cell according to some embodiments of the present application;

[0068] Figure 4Cross-sectional views of battery cells according to some embodiments of the present application;

[0069] Figure 5 for Figure 4 A partial enlarged view of point A in the middle;

[0070] Figure 6 Schematic diagram of a partial structure of a battery device according to some embodiments of the present application;

[0071] Figure 7 Schematic diagrams of partial structures of battery devices according to some other embodiments of the present application;

[0072] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0073] Figure 9 A partial schematic diagram of a confluence component according to some embodiments of the present application;

[0074] Figure 10 A cross-sectional view of a portion of a battery device according to some embodiments of the present application;

[0075] Figure 11 for Figure 10 A partial enlarged view of point C in the middle;

[0076] Figure 12 are cross-sectional views of partial structures of battery devices according to some other embodiments of the present application;

[0077] Figure 13 A cross-sectional view of a portion of a battery device according to some further embodiments of the present application;

[0078] Figure 14 are cross-sectional views of partial structures of battery devices according to other embodiments of the present application;

[0079] Figure 15 A schematic structural diagram of a portion of a battery device according to some embodiments of the present application;

[0080] Figure 16 This is an isometric view of a partial structure of a battery device according to some embodiments of the present application;

[0081] Figure 17 Cross-sectional views of partial structures of battery devices according to some other embodiments of the present application;

[0082] Figure 18 Schematic diagrams of partial structures of battery devices according to some other embodiments of the present application.

[0083] The accompanying drawings in the specific implementation manner are as follows:

[0084] 1000 - vehicle; 200 - controller; 300 - motor; 100 - battery device; 11 - housing; 111 - first housing; 112 - second housing; 12 - battery cell; 121 - housing; 1211 - end cap; 1212 - housing; 1213 - first outer end surface; 1214 - second outer end surface; 122 - electrode assembly; 123 - electrode terminal; 1231 - first electrode terminal; 1232 - second electrode terminal; 1233 - positioning groove; 12331 - first positioning groove; 12332 - second positioning groove; 124 - adapter; 13 - circuit board; 131-main body; 132-sampling part; 133-temperature measuring component; 134-sampling line; 1341-soldering pad; 135-signal lead plug; 14-busbar component; 141-first busbar component; 142-second busbar component; 143-first busbar layer; 144-second busbar layer; 145-first connecting section; 146-second connecting section; 147-positioning hole; 1471-first positioning hole; 1472-second positioning hole; 15-weld mark; 151-first weld mark; 152-second weld mark; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0085] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0086] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0087] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0088] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0089] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0090] The term "plurality" used in this application refers to two or more (including two).

[0091] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0092] Battery cells include but are not limited to lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0093] A battery cell typically includes an electrode assembly. This assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process, active ions (such as lithium ions) move back and forth between the positive and negative electrodes. A separator, placed between the positive and negative electrodes, reduces the risk of short circuits while allowing active ions to pass through.

[0094] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0095] In some embodiments, the electrode assembly is a laminate structure.

[0096] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0097] In some embodiments, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive electrode tab and a negative electrode tab.

[0098] In some embodiments, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0099] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal battery cells. Polygonal battery cells are, for example, hexagonal battery cells.

[0100] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0101] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0102] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells. For example, the battery cell assembly may be a battery module, which is a battery module formed by arranging and securing multiple battery cells to form a single module. For example, a battery module may be formed by bundling multiple battery cells using cable ties.

[0103] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are housed in the case.

[0104] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0105] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells to the box.

[0106] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0107] In some embodiments, the battery device may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0108] A circuit board and a battery management system are generally installed inside the battery device. The circuit board generally includes a main body and a sampling part. The sampling part is connected to the circuit inside the main body and is used to sample the status of each battery cell (such as temperature, voltage, etc.). The battery management system will adjust the battery device according to the battery cell status information obtained by the sampling part to achieve charge and discharge management of the battery device, as well as temperature regulation.

[0109] The development of battery technology must consider multiple design factors simultaneously, such as performance parameters such as charge and discharge rate, reliability, energy density, discharge capacity, cycle life, and the energy replenishment efficiency of the battery device.

[0110] Typically, the circuit board in a battery device is disposed on one side of one of the walls of the battery cell's housing. The circuit board and the electrode terminals of the battery cell can be arranged side by side on the wall. However, due to limited space on the wall, the placement of the circuit board will limit the size of the electrode terminals and / or the busbar, which in turn may limit the flow capacity of the electrode terminals, the busbar, or the space between the two, leading to the risk of reduced energy recharge efficiency of the battery device.

[0111] In view of this, the present application provides a battery device, which includes a plurality of battery cells, a busbar and a circuit board. The battery cells include a housing and electrode terminals, and the electrode terminals are arranged on the housing. The busbar is connected to the electrode terminals, and the busbar is used to achieve electrical connection between the plurality of battery cells. The circuit board is arranged on the first outer end surface of the housing, and the circuit board includes a main body and a sampling part. One end of the sampling part is connected to the main body, and the other end is connected to the busbar or the battery cell. At least part of the main body and at least part of the busbar are stacked along a first direction, and the first direction intersects with the first outer end surface, and / or at least part of the main body and at least part of the electrode terminals are stacked along a first direction, and the first direction intersects with the first outer end surface. Since the area of ​​the first outer end surface is limited, when the main body and the busbar and / or the electrode terminals are stacked in the first direction, it is advantageous to arrange a larger busbar on the first outer end surface, thereby improving the current-carrying capacity of the busbar. Alternatively, larger electrode terminals can be arranged parallel to the first outer end surface, thereby improving the current carrying capacity of the electrode terminals. In some embodiments, the size of both the busbar and the electrode terminals can be increased simultaneously to improve the current carrying capacity between the electrode terminals and the busbar. Furthermore, larger electrode terminals and / or busbars can also improve the stability of the connection between them.

[0112] The battery cells described in the embodiments of the present application are suitable for use in batteries and electrical devices using the battery cells.

[0113] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0114] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0115] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. Vehicle 1000 is internally provided with a battery, which can be located at the bottom, front, or rear of vehicle 1000. The battery can be used to power vehicle 1000, for example, as an operating power source for vehicle 1000.

[0116] The vehicle 1000 may further include a controller 200 and a motor 300 . The controller 200 is used to control the battery to supply power to the motor 300 , for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0117] In some embodiments of the present application, the battery can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0118] Please refer to Figure 2 , Figure 2 The exploded view of the battery device 100 provided in some embodiments of the present application. The battery device 100 may include a battery cell 12 and a housing 11 , wherein the battery cell 12 is accommodated in the housing 11 .

[0119] The housing 11 is a component that houses the battery cells 12. The housing 11 provides a storage space for the battery cells 12 and can have various structures. In some embodiments, the housing 11 may include a first housing 111 and a second housing 112. The first housing 111 and the second housing 112 overlap to define a storage space for the battery cells 12. The first housing 111 and the second housing 112 may have various shapes, such as a rectangular parallelepiped or a cylindrical shape. The first housing 111 may be a hollow structure with an opening on one side, and the second housing 112 may be a hollow structure with an opening on one side. The open side of the second housing 112 overlaps the open side of the first housing 111, thereby forming the housing 11 with a storage space. Alternatively, the first housing 111 may be a hollow structure with an opening on one side, and the second housing 112 may be a plate-shaped structure. The second housing 112 overlaps the open side of the first housing 111, thereby forming the housing 11 with a storage space. The first box body 111 and the second box body 112 can be sealed by a sealing element, which can be a sealing ring, sealant, etc.

[0120] In the battery device 100, there can be one or more battery cells 12. If there are multiple battery cells 12, the multiple battery cells 12 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 12. Multiple battery cells 12 can be connected in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a whole and housed within the housing 11. Alternatively, all battery cells 12 can be directly connected in series, in parallel, or in a hybrid connection, and then the whole battery module 12 can be housed within the housing 11.

[0121] Please refer to Figure 3 , Figure 3 This is an exploded view of a battery cell 12 provided in some embodiments of the present application; the battery cell 12 may include a housing 121 and an electrode assembly 122 , and the electrode assembly 122 is accommodated in the housing 121 .

[0122] In some embodiments, the housing 121 may include a shell 1212 and an end cover 1211 , wherein the shell 1212 has an opening and the end cover 1211 closes the opening of the shell 1212 .

[0123] The shell 1212 is a component for accommodating the electrode assembly 122. The shell 1212 can be a hollow structure with an opening formed at one end, or a hollow structure with openings formed at two opposite ends. The shell 1212 can be in various shapes, such as cylindrical, rectangular, etc. The shell 1212 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The electrode assembly 122 can be partially located in the shell 1212, or it can be completely located in the shell 1212. Optionally, the electrode assembly 122 accommodated in the outer shell 121 can be one or more. For example, in Figure 3 In the embodiment, the housing 121 of the battery cell 12 is provided with two electrode assemblies 122, and the two electrode assemblies 122 are stacked along the thickness direction of the battery cell 12. In other embodiments, the electrode assemblies 122 accommodated in the housing 121 may be one, three, four, five, six, seven, or eight. The housing 121 may also be used to accommodate an electrolyte, such as an electrolyte solution.

[0124] The end cap 1211 is a component that closes the opening of the shell 1212 to isolate the internal environment of the battery cell 12 from the external environment. The end cap 1211 and the shell 1212 together define a storage space for accommodating the electrode assembly 122, electrolyte and other components. The end cap 1211 can be connected to the shell 1212 by welding or crimping to close the opening of the shell 1212. The shape of the end cap 1211 can be adapted to the shape of the shell 1212. For example, if the shell 1212 is a rectangular parallelepiped structure, the end cap 1211 is a rectangular plate structure adapted to the shell 1212. For another example, if the shell 1212 is a cylindrical structure, the end cap 1211 is a circular plate structure adapted to the shell 1212. The material of the end cap 1211 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the end cap 1211 and the shell 1212 can be the same or different.

[0125] In embodiments where the housing 1212 is open at one end, one end cap 1211 may be provided. In embodiments where the housing 1212 is open at opposite ends, two end caps 1211 may be provided. The two end caps 1211 respectively seal the two openings of the housing 1212, and the two end caps 1211 and the housing 1212 together define a receiving space. When assembling the battery cell 12, the electrode assembly 122 may be placed into the housing 1212 first, and the electrolyte may be filled into the housing 1212. The end caps 1211 may then be placed over the openings of the housing 1212 to seal the openings.

[0126] In some embodiments, the battery cell 12 may further include an electrode terminal 123, which is disposed on the outer casing 121. The electrode terminal 123 is used to electrically connect to the tabs of the electrode assembly 122 to input or output electrical energy from the battery cell 12. The electrode terminal 123 may be disposed on the housing 1212 of the outer casing 121 or on the end cap 1211 of the outer casing 121. The electrode terminal 123 may be directly connected to the tab, for example, by welding. The electrode terminal 123 may also be indirectly connected to the tab, for example, through a current collecting member. The current collecting member may be a metal conductor, such as copper, iron, aluminum, steel, or an aluminum alloy. In some embodiments, the current collecting member may also be referred to as an adapter 124. By way of example, the electrode terminal 123 may be made of a variety of materials, such as copper, iron, aluminum, steel, or an aluminum alloy. Of course, in some embodiments, the electrode terminal 123 may also be made of a composite material, that is, the electrode terminal 123 is formed by connecting two metals of different materials together, for example, by hot pressing or cold pressing.

[0127] In some embodiments, the battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar 14. The busbar 14 is used to connect the multiple battery cells 12. For example, the busbar 14 may electrically connect the positive terminal of one of two adjacent battery cells 12 to the negative terminal of the other by welding, snapping, abutting, etc., to achieve electrical connection between the multiple battery cells 12. The wall portion of the housing 121 where the electrode terminals 123 are provided is generally provided with terminal holes. The terminal holes extend through both sides of the wall portion along the thickness direction of the wall portion. The electrode terminals 123 are inserted into the terminal holes along the thickness direction of the wall portion, so that a portion of the electrode terminals 123 is located within the terminal holes. This allows the electrode terminals 123 to connect to both the electrode assembly 122 located inside the housing 121 and the busbar 14 located outside the housing 121, thereby achieving input or output of electrical energy from the battery cells 12.

[0128] According to some embodiments of this application, please refer to Figure 4-Figure 5The present application provides a battery device 100, which includes a plurality of battery cells 12, a current bus 14, and a circuit board 13. The battery cells 12 include a housing 121 and electrode terminals 123, with the electrode terminals 123 disposed on the housing 121. The current bus 14 is connected to the electrode terminals 123 and is used to electrically connect the plurality of battery cells 12. The circuit board 13 is disposed on a first outer end surface 1213 of the housing 121. The circuit board 13 includes a main body 131 and a sampling portion 132. The sampling portion 132 is connected to the main body 131 at one end and to the current bus 14 or the battery cells 12 at the other end. At least a portion of the main body 131 and at least a portion of the current bus 14 are stacked along a first direction X, which intersects the first outer end surface 1213. Alternatively, at least a portion of the main body 131 and at least a portion of the electrode terminals 123 are stacked along the first direction X, which intersects the first outer end surface 1213.

[0129] It should be noted that the stacked arrangement can be understood as the two being in contact, or can be understood as the two being spaced apart along a direction.

[0130] In some embodiments, the first direction X is perpendicular to the first outer end surface 1213 .

[0131] The circuit board 13 is disposed on the first outer end surface 1213 of the housing 121, which means that the circuit board 13 is disposed on the side of the first outer end surface 1213 of the housing 121 facing away from the interior of the battery cell 12, or the circuit board 13 is in contact with the first outer end surface 1213. The first outer end surface 1213 can be any outer surface of the housing 121.

[0132] In some embodiments, the electrode terminal 123 includes a positive terminal and a negative terminal, and the positive terminal and the negative terminal can be set on the same wall of the shell 121, or on two opposite walls of the shell 121, or on two adjacent walls of the shell 121.

[0133] In some embodiments, the electrode assembly 122 may include a straight area, which is a straight portion of the electrode assembly 122. The portion of the positive electrode sheet located in the straight area is generally in a straight state, and the portion of the negative electrode sheet located in the straight area is generally in a straight state. As an example, the portion of the positive electrode sheet located in the straight area and the portion of the negative electrode sheet located in the straight area are both flat plate structures. If the electrode assembly 122 is a laminated structure, the electrode assembly 122 is a laminated electrode assembly 122, and the electrode assembly 122 as a whole is a straight area. If the electrode assembly 122 is a wound structure, the electrode assembly 122 is a wound electrode assembly 122, and the electrode assembly 122 may also include a corner area, which is located at at least one end of the straight area along a direction, and at least part of the surface of the electrode sheet of the electrode assembly 122 located in the corner area is a curved surface.

[0134] In some embodiments, the battery cell 12 is a prismatic battery cell. The housing 121 includes a first wall and a second wall that oppose each other along a first direction X, a third wall and a fourth wall that oppose each other along a second direction Y, and a fifth wall and a sixth wall that oppose each other along a third direction Z. The first, second, third, fourth, fifth, and sixth walls collectively define a cavity for accommodating the electrode assembly 122. The fifth and sixth walls are the largest of the six walls. The third direction Z is the thickness direction of the battery cell 12, i.e., the direction in which the straight regions of the electrode assembly 122 are stacked. The surface of the first wall facing away from the cavity is the first outer end surface 1213. The positive and negative terminals are both located on the first wall. Of course, in this embodiment, the positive and negative terminals can also be located on the first and second walls, respectively. In some other implementations of this embodiment, the dimension of the first wall along the second direction Y is smaller than the dimension of the fifth wall along the first direction X and larger than the dimension of the third wall along the third direction Z, resulting in the battery cell 12 being blade-shaped.

[0135] In some embodiments, the battery cell 12 is a prismatic battery cell. The housing 121 includes a first wall and a second wall that oppose each other along a first direction X, a third wall and a fourth wall that oppose each other along a second direction Y, and a fifth wall and a sixth wall that oppose each other along a third direction Z. The first, second, third, fourth, fifth, and sixth walls collectively define a cavity for accommodating the electrode assembly 122. The fifth and sixth walls are the largest of the six walls. The third direction Z is the thickness direction of the battery cell 12, i.e., the direction in which the straight regions of the electrode assembly 122 are stacked. The surface of the first wall facing away from the cavity is the first outer end surface 1213. The positive and negative terminals are both located on the fifth wall. Of course, in this embodiment, the positive and negative terminals may alternatively be located on the fifth and sixth walls, respectively. In some other implementations of this embodiment, the dimension of the first wall along the second direction Y is smaller than the dimension of the fifth wall along the first direction X and larger than the dimension of the third wall along the third direction Z, resulting in the battery cell 12 being blade-shaped.

[0136] In some embodiments, the battery cell 12 includes only one electrode terminal 123, which can be disposed on any wall of the housing 121. In this embodiment, the electrode terminal 123 serves as one output terminal of the battery cell 12, and the housing 121 serves as the other output terminal of the battery cell 12. The battery cell 12 can be either a prismatic or cylindrical battery cell 12.

[0137] In some embodiments, the circuit board 13 is a flexible circuit board.

[0138] In some embodiments, the circuit board 13 is a printed circuit board.

[0139] In some embodiments, the busbar 14 is electrically connected to the electrode terminals 123 of the plurality of battery cells 12 to achieve electrical connection of the plurality of battery cells 12. The busbar 14 and the electrode terminals 123 may be electrically connected by welding, riveting, abutting, or the like.

[0140] In some embodiments, the sampling portion 132 includes a temperature measurement component 133, which includes a thermistor. One end of the thermistor is electrically connected to the main body 131 via a sampling line 134, and the other end of the thermistor is in contact with the electrode terminal 123 and / or the busbar 14, thereby jointly acquiring temperature. The sampling line 134 can be a small flexible printed circuit board or a conductive wire.

[0141] In some embodiments, the sampling portion 132 includes a transfer wire, for example, the transfer wire is a nickel sheet, which contacts the busbar component 14 and / or the electrode terminal 123 and is electrically connected to the main body 131, thereby jointly realizing voltage collection.

[0142] At least part of the main body 131 and at least part of the conduit component 14 are stacked along the first direction X, and the first direction X intersects with the first outer end face 1213, which means that in the direction parallel to the first outer end face 1213, part of the main body 131 and part of the conduit component 14 will not share space, that is, on the premise of setting the circuit board 13, more space is made for arranging a larger-sized conduit component 14.

[0143] At least a portion of the main body 131 and at least a portion of the electrode terminals 123 are stacked along a first direction X, which intersects the first outer end surface 1213. This means that in a direction parallel to the first outer end surface 1213, part of the main body 131 and part of the electrode terminals 123 do not share space. In other words, while the circuit board 13 is provided, more space is left for arranging larger electrode terminals 123.

[0144] In the above technical solution, since the area of ​​the first outer end surface 1213 is limited, when the main body 131 and the busbar component 14 and / or the electrode terminal 123 are stacked in the first direction X, the portion of the main body 131 that does not overlap with the busbar component 14 and the electrode terminal 123 along the first direction X can occupy a smaller layout area on the first outer end surface 1213, so that more area on the first outer end surface 1213 can be used to arrange a busbar component 14 and / or electrode terminal 123 with a larger size; when more area of ​​the first outer end surface 1213 can be used to arrange a busbar component 14 with a larger size, it is beneficial to improve the flow capacity of the busbar component 14 itself; when more area of ​​the first outer end surface 1213 can be used to arrange a busbar component 14 with a larger size, it is beneficial to improve the flow capacity of the electrode terminal 123 itself; when more area of ​​the first outer end surface 1213 can be used to arrange a busbar component 14 with a larger size and / or an electrode terminal 123, it is beneficial to improve the flow capacity of the electrode terminal 123 itself; when more area of ​​the first outer end surface 1213 can be used to arrange a busbar component 14 with a larger size and an electrode terminal 123, not only can the flow capacity of the two themselves be improved, but also the flow between the two can be improved. Moreover, it is also beneficial to improve the connection stability between the two.

[0145] According to some embodiments of this application, please refer to Figure 3-Figure 5 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The first electrode terminal 1231 and the second electrode terminal 1232 are arranged at intervals along the second direction Y, and the second direction Y intersects the first direction X. The maximum distance D1 between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y is less than the maximum dimension d1 of the main body 131 along the second direction Y.

[0146] The maximum distance D1 between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y refers to the maximum measured value of the distance between the first electrode terminal 1231 and the second electrode terminal 1232 after multiple measurements. The distance between the first electrode terminal 1231 and the second electrode terminal 1232 refers to the distance between the opposite sides of the first electrode terminal 1231 and the second electrode terminal 1232, that is, Figure 4 The distance between the right side of the first electrode terminal 1231 and the left side of the second electrode terminal 1232. When the first electrode terminal 1231 and the second electrode terminal 1232 have special-shaped profiles, the distance between the circumscribed circle of the orthographic projection of the first electrode terminal 1231 and the circumscribed circle of the second electrode terminal 1232, within the same projection plane perpendicular to the first outer end surface 1213, can be measured.

[0147] The maximum dimension d1 of the main body 131 along the second direction Y refers to a maximum measurement value of the dimension of the main body 131 along the second direction Y obtained after multiple measurements.

[0148] The first electrode terminal 1231 and the second electrode terminal 1232 may have the same or different sizes in the second direction Y. The first electrode terminal 1231 and the second electrode terminal 1232 may have the same or different shapes.

[0149] In an embodiment in which the main body 131 is at least partially stacked with the electrode terminal 123 along the first direction X, or in an embodiment in which the main body 131 is at least partially stacked with the busbar component 14 and the electrode terminal 123 along the first direction, it can be arranged so that the maximum distance D1 between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y is smaller than the maximum dimension d1 of the main body 131 along the second direction Y, so that there is no need to reserve a larger distance between the first electrode terminal 1231 and the second electrode terminal 1232 to place the main body 131, and the first outer end surface 1213 can be more fully utilized to arrange a larger electrode terminal 123. For example, the dimensions of the first electrode terminal 1231 and the second electrode terminal 1232 can be set larger, which can improve the current flow capacity of both.

[0150] The maximum distance and maximum size mentioned below refer to the maximum measured values ​​obtained after multiple measurements as mentioned above.

[0151] According to some embodiments of this application, please refer to Figure 4-Figure 5 The maximum distance D2 between the two farthest points of the outer contour of the first electrode terminal 1231 and the outer contour of the second electrode terminal 1232 in the second direction Y is greater than or equal to the maximum dimension d2 of the circuit board 13 along the second direction Y.

[0152] Since the maximum distance D2 between the two farthest points of the outer contour of the first electrode terminal 1231 and the outer contour of the second electrode terminal 1232 in the second direction Y is greater than or equal to the maximum dimension d2 of the circuit board 13 along the second direction Y, compared with arranging the main body 131 between the first electrode terminal 1231 and the second electrode terminal, the space around the main body 131 is larger, which makes the arrangement of the sampling portion 132 more flexible, for example, Figure 4 and Figure 5 As shown, in some embodiments, the main body 131 is disposed in the middle of the first outer end surface 1213. The sampling portion 132 extends from the edge of the main body 131 in the second direction Y, leaving the first electrode terminal 1231 and the second electrode terminal 1232 at least partially exposed. The exposed portion can be directly connected to the sampling portion 132, thereby reducing the difficulty of electrically connecting the circuit board 13 and the electrode terminal 123. In other words, along the second direction Y, the first electrode terminal 1231 at least partially extends beyond the main body 131, and / or, along the second direction Y, the second electrode terminal 1232 at least partially extends beyond the main body 131.

[0153] According to some embodiments of this application, please refer to Figure 3-Figure 5 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213 . The first electrode terminal 1231 and the second electrode terminal 1232 are at least partially stacked with the main body 131 along the first direction X.

[0154] In some embodiments, the sampling portion 132 and the first electrode terminal 1231 and / or the second electrode terminal 1232 are arranged along the second direction Y.

[0155] The first electrode terminal 1231 and the second electrode terminal 1232 are both at least partially stacked with the main body 131 along the first direction X, so that the main body 131 can be set on the outer end surfaces of the first electrode terminal 1231 and the second electrode terminal 1232 along the first direction X. There is no need to reserve a large distance between the first electrode terminal 1231 and the second electrode terminal 1232 due to the need to arrange a main body 131 of a certain size. In this way, the distance between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y can be reserved smaller, and the first electrode terminal 1231 and the second electrode terminal 1232 can be arranged on the outer end surfaces of the first electrode terminal 1231 and the second electrode terminal 1232. More space along the second direction Y on an outer end surface 1213 is used to increase the size of the first electrode terminal 1231 and the second electrode terminal 1232; when the distance between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y is reduced, the size of the main body 131 itself along the second direction Y can also be maintained, so that the number of circuits arranged on the main body 131 and the required insulation gap between the circuits are not affected, which can help improve the overcurrent capacity of the first electrode terminal 1231 and the second electrode terminal 1232 without affecting the reliability.

[0156] In the above scheme, since the first electrode terminal 1231 and the second electrode terminal 1232 are at least partially stacked with the main body 131 along the first direction X, the heat generated by the circuit board 13 is distributed more uniformly, which is conducive to maintaining a good current flow capacity between the electrode terminal 123 and the busbar component 14 and between the electrode terminal 123 and the electrode assembly 122.

[0157] According to some embodiments of this application, please refer to Figure 3-Figure 5 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The first electrode terminal 1231 and the second electrode terminal 1232 are arranged at intervals along the second direction Y. The circuit board 13 includes a plurality of sampling portions 132. At least one sampling portion 132 protrudes from the edge of the main body 131 on one side along the second direction Y and is completely stacked with the busbar component 14 along the first direction X.

[0158] At least one sampling portion 132 protrudes from an edge of the main body 131 on one side along the second direction Y and completely overlaps with the busbar component 14 along the first direction X. In this way, the sampling portion 132 does not occupy the dimensional space on the first outer end surface 1213 along the second direction Y, so that the provision of the sampling portion 132 does not limit the size of the first electrode terminal 1231 and the second electrode terminal 1232, as well as the size of the busbar component 14, which facilitates the provision of a larger electrode terminal 123.

[0159] In some embodiments, the multiple sampling portions 132 include multiple groups of sampling portions 132, each group of sampling portions 132 includes multiple sampling portions 132 arranged at intervals, one group of sampling portions 132 is located between the confluence component 14 and the first outer end surface 1213, and one group of sampling portions 132 is located on the side of the confluence component 14 away from the first outer end surface 1213. Such an arrangement provides a larger assembly space for the sampling portions 132 while also reducing the overall size of the circuit board 13, the battery cell 12, and the confluence component 14 in the first direction X to a certain extent, which is beneficial to improving the energy density of the battery device 100.

[0160] In the above solution, the sampling portion 132 can be stacked with the busbar component 14 along the first direction X, so that the sampling portion 132 does not occupy the dimensional space of the first outer end surface 1213 along the second direction Y alone. The dimensional space of the first outer end surface 1213 along the second direction Y can be used to increase the size of the busbar component 14 along the second direction Y, so as to improve the flow capacity between the busbar component 14 and the electrode terminal 123.

[0161] According to some embodiments of this application, please refer to Figure 3-Figure 5 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The busbar 14 includes a first busbar 141 and a second busbar 142. The first busbar 141 is used to connect to the first electrode terminal 1231, and the second busbar 142 is used to connect to the second electrode terminal 1232. The first busbar 141 and the second busbar 142 are arranged at intervals along the second direction Y. The maximum distance D3 between the first busbar 141 and the second busbar 142 along the second direction Y is less than the maximum dimension d1 of the main body 131 along the second direction Y.

[0162] In some embodiments, the first electrode terminal 1231 is a positive terminal, the second electrode terminal 1232 is a negative terminal, the multiple battery cells 12 include a first battery cell 12, a second battery cell 12 and a third battery cell 12 arranged in sequence, the first bus component 141 electrically connects the positive terminal of the first battery cell 12 and the negative terminal of the second battery cell 12, and the second bus component 142 electrically connects the positive terminal of the second battery cell 12 and the negative terminal of the third battery cell 12, so that the first battery cell 12, the second battery cell 12 and the third battery cell 12 are connected in series.

[0163] The maximum distance D3 between the first convergence component 141 and the second convergence component 142 along the second direction Y is smaller than the maximum dimension d1 of the main body 131 along the second direction Y. Since the main body 131 can be arranged to be at least partially overlapped with at least one of the first convergence component 141 or the second convergence component 142 along the second direction Y, the distance between the first convergence component 141 and the second convergence component 142 along the second direction Y can be shortened to increase the dimension of at least one of the first convergence component 141 and the second convergence component 142 along the second direction Y, so that the flow capacity of at least one of the first convergence component 141 or the second convergence component 142 can be enhanced.

[0164] According to some embodiments of this application, please refer to Figure 4-Figure 6 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213, and the busbar component 14 includes a first busbar component 141 and a second busbar component 142. The first busbar component 141 is used to connect the first electrode terminal 1231, and the second busbar component 142 is used to connect the second electrode terminal 1232. The first busbar component 141 and the second busbar component 142 are at least partially stacked with the main body 131 along the first direction X.

[0165] The first and second collecting members 141 and 142 may jointly pre-position the main body 131 .

[0166] In the above scheme, since the first convergence component 141 and the second convergence component 142 are at least partially stacked with the main body 131 along the first direction X, the first convergence component 141, the second convergence component 142 and the main body 131 do not need to be arranged in sequence along the second direction Y, so that the distance between the first convergence component 141 and the second convergence component 142 along the second direction Y can be shortened, and more space on the first outer end surface 1213 can be used to increase the size of the first convergence component 141 and the second convergence component 142, so that the flow capacity of the convergence component 14 can be improved.

[0167] According to some embodiments of this application, please refer to Figure 7-Figure 9The conduit component 14 is at least partially folded along the second direction Y to form a multi-layer stacked structure, and the second direction Y intersects with the first direction X.

[0168] The stacked structure of the busbar component 14 means that it has a relatively larger flow area than the single-layer busbar component 14 , which is beneficial to improving the flow capacity between the busbar component 14 and the electrode terminal 123 .

[0169] In the above solution, since the flow-collecting component 14 is at least partially folded along the second direction Y to form a multi-layer stacked structure, it is beneficial to improve the flow capacity of the flow-collecting component 14 while occupying a smaller space in the second direction Y.

[0170] According to some embodiments of this application, please refer to Figure 10 and Figure 11 The circuit board 13 includes a plurality of main bodies 131 stacked along a first direction X. At least one of the plurality of main bodies 131 is stacked with at least a portion of the busbar 14 along the first direction X, and / or at least one of the plurality of main bodies 131 is stacked with at least a portion of the electrode terminals 123 along the first direction X.

[0171] In some embodiments, part of the main body 131 is located on the side of the busbar 14 facing the first outer end surface 1213, and part of the main body 131 is located on the side of the busbar 14 facing away from the first outer end surface 1213. This arrangement can reduce the overall size of the circuit board 13, battery cells 12, and busbar 14 in the first direction X while arranging a larger busbar 14, thereby facilitating an increase in the energy density of the battery device 100. Of course, in some embodiments, all of the main body 131 can be located on the side of the busbar 14 facing the first outer end surface 1213.

[0172] Because the circuit board 13 includes multiple main bodies 131 stacked along the first direction X, the placement of the sampling portion 132 is more flexible, making assembly of the circuit board 13 more convenient. In this embodiment, at least one of the multiple main bodies 131 is stacked with at least a portion of the current collector 14 along the first direction X, and / or at least one of the multiple main bodies 131 is stacked with at least a portion of the electrode terminals 123 along the first direction X. Part of the main body 131 does not occupy space parallel to the first outer end surface 1213, thereby not limiting the dimensions of the current collector 14 and the electrode terminals 123 in the second direction Y.

[0173] In the above solution, when space along the second direction Y on the first outer end surface 1213 is limited, in order to accommodate a larger number of sampling portions 132 while achieving a higher circuit density on the circuit board 13, the circuit board 13 may be configured to include multiple main bodies 131 stacked along the first direction X. In this case, at least one of the multiple main bodies 131 is stacked with at least a portion of the current busbar 14 along the first direction X, and / or at least one of the multiple main bodies 131 is stacked with at least a portion of the electrode terminals 123 along the first direction X. This advantageously prevents portions of the main bodies 131 from sharing space with the current busbar 14 and / or the electrode terminals 123 in a direction parallel to the first outer end surface 1213. This allows for the arrangement of a larger current busbar 14 and / or electrode terminals 123, thereby enhancing the current handling capacity of the battery device 100.

[0174] According to some embodiments of this application, please refer to Figure 12 At least a portion of the circuit board 13 is located between the busbar component 14 and the first outer end surface 1213 .

[0175] At least a portion of the circuit board 13 is located between the busbar 14 and the first outer end surface 1213, which means that a portion of the circuit board 13 is disposed in the gap formed between the busbar 14 and the first outer end surface 1213 along the first direction X, so that the space in the gap is utilized. While the busbar 14 has a large size, the circuit board 13 does not occupy the space on the side of the busbar 14 away from the first outer end surface 1213, which is also beneficial to improving the energy density of the battery device 100. For example, please refer to Figure 12 The circuit board 13 and the electrode terminals 123 share part of the space, thereby improving the energy density of the battery device 100.

[0176] In the above solution, since at least a portion of the circuit board 13 is located between the busbar component 14 and the first outer end surface 1213, part of the circuit board 13 can be arranged in the gap formed between the busbar component 14 and the first outer end surface 1213 along the first direction X, so that the space in the gap is utilized. While providing a larger busbar component 14 to improve the current carrying capacity of the battery device 100, it is also beneficial to improve the energy density of the battery device 100.

[0177] According to some embodiments of this application, please refer to Figure 12 The main body 131 and / or the sampling portion 132 of the circuit board 13 are located between the confluence component 14 and the first outer end surface 1213 .

[0178] The main body 131 and / or the sampling portion 132 of the circuit board 13 are located between the confluence component 14 and the first outer end surface 1213, which means that the main body 131 and / or the sampling portion 132 are arranged in the gap formed between the confluence component 14 and the first outer end surface 1213 along the first direction X, so that the space in the gap is utilized. While the confluence component 14 has a large size, the main body 131 and / or the sampling portion 132 will not occupy the space on the side of the confluence component 14 away from the first outer end surface 1213, which is also conducive to improving the energy density of the battery device 100. For example, please refer to Figure 12 The main body 131 and / or the sampling portion 132 of the circuit board 13 are located on one side of the electrode terminal 123 in the second direction Y, and at least one of the main body 131 and the sampling portion 132 shares part of the space with the electrode terminal 123, which is beneficial to improving the energy density of the battery device 100.

[0179] In the above solution, the main body 131 and / or the sampling portion 132 can be disposed between the flow conduit component 14 and the first outer end surface 1213 so that the gap formed between the flow conduit component 14 and the first outer end surface 1213 can be utilized, thereby enabling the battery device 100 to have a higher energy density.

[0180] According to some embodiments of this application, please refer to Figure 11 The circuit board 13 further includes a temperature measuring component 133 , which is connected to at least one sampling line 134 of the circuit board 13 . The temperature measuring component 133 is at least partially disposed on a surface of the circuit board 13 facing the first outer end surface 1213 .

[0181] The temperature measuring component 133 is at least partially disposed on the surface of the circuit board 13 facing the first outer end surface 1213, which means that the temperature measuring component 133 is at least partially disposed in the gap formed between the circuit board 13 and the first outer end surface 1213 along the first direction X, so that the space in the gap is utilized, and the temperature measuring component 133 does not occupy the space on the side of the confluence component 14 away from the first outer end surface 1213, which is also beneficial to improving the energy density of the battery device 100. For example, please refer to Figure 11 The temperature measuring component 133 is at least partially disposed on the surface of the circuit board 13 facing the first outer end surface 1213 , and the temperature measuring component 133 can share part of the space with the electrode terminal 123 in the first direction X.

[0182] In the above solution, since the temperature measuring component 133 usually has a certain thickness, at least a portion of the temperature measuring component 133 can be set on the surface of the circuit board 13 facing the first outer end surface 1213. The space between the circuit board 13 and the first outer end surface 1213 can be used to accommodate the temperature measuring component 133, which is beneficial to improving space utilization and increasing the energy density of the battery device 100.

[0183] According to some embodiments of this application, please refer to Figure 13 The circuit board 13 includes a signal lead-out plug 135 , which is connected to the sampling line 134 on the circuit board 13 on a surface of the circuit board 13 facing the first outer end surface 1213 .

[0184] The signal output plug 135 is used to output the signal collected by the sampling unit 132 .

[0185] The sampling line 134 may be a circuit integrated into the main body 131 , or may be a wire electrically connected to the main body 131 .

[0186] In the above solution, since the signal lead-out plug 135 generally has a certain thickness, by disposing at least a portion of the signal lead-out plug 135 on the surface of the circuit board 13 facing the first outer end surface 1213, the space between the circuit board 13 and the first outer end surface 1213 can be used to accommodate the signal lead-out plug 135, which is beneficial for improving the energy density of the battery device 100.

[0187] According to some embodiments of this application, please refer to Figure 11 The sampling portion 132 includes a pad 1341 , and the pad 1341 is connected to the current collecting component 14 .

[0188] The solder pad 1341 is connected to the current collecting component 14 , which means that the sampling portion 132 is directly electrically connected to the current collecting component 14 , eliminating the need for a transfer wire, such as a nickel sheet, thereby reducing the space occupied by the circuit board 13 .

[0189] In the above solution, compared to the method in which the sampling portion 132 is connected to the busbar component 14 via the adapter 124 stacked with the main body 131 along the first direction X, the sampling portion 132 is directly connected to the busbar component 14 via the solder pad 1341, which can reduce the space occupied by the circuit board 13 in the first direction X, thereby improving the energy density of the battery device 100.

[0190] According to some embodiments of this application, please refer to Figure 7-Figure 9 and Figure 14 The multi-layer stacked structure includes a first busbar layer 143 and a second busbar layer 144. The first busbar layer 143 is connected to the electrode terminal 123 and forms a connection area. The second busbar layer 144 includes an avoidance through-hole. The avoidance through-hole is at least partially arranged corresponding to the connection area along the first direction X. The second busbar layer 144 is located on the side of the first busbar layer 143 away from the first outer end surface 1213.

[0191] The connection region formed between the first busbar layer 143 and the electrode terminal 123 may be a weld region.

[0192] The outline of the avoidance hole can be circular, semicircular, polygonal, etc., of course, it can also be as 8 and Figure 9 Shown as an irregular shape.

[0193] The provision of the avoidance through-hole means that the first busbar layer 143 and the electrode terminal 123 can be connected from the side of the busbar component 14 facing away from the first outer end face 1213. For example, when the two are connected by welding, the welding gun can be located on the side of the busbar component 14 facing away from the first outer end face 1213 to weld the two. The arrangement of the welding gun is more flexible and conducive to automated production. At the same time, while the busbar component 14 has a large flow area, connecting the two only requires connecting the first busbar layer 143 and the electrode terminal 123, without having to connect the first busbar layer 143, the second busbar layer 144, and the electrode terminal 123 at the same time. The connection difficulty is relatively low. For example, when welding the busbar component 14 and the electrode terminal 123, the thickness of the material required for penetration is small, the deformation after welding is small, and the risk of welding defects is relatively low.

[0194] In the above scheme, the arrangement of the first busbar layer 143 and the second busbar layer 144 can enable the busbar component 14 to have a larger flow cross-sectional area. In the multi-layer stacked structure, it is only necessary to connect the first busbar layer 143 and the electrode terminal 123 to achieve electrical connection between the busbar component 14 and the electrode terminal 123. At the same time, since the second busbar layer 144 includes an avoidance through-hole arranged corresponding to the connection area, the connection between the first busbar layer 143 and the electrode terminal 123 can be carried out at the position of the avoidance through-hole, which can reduce the difficulty of welding the multi-layer stacked structure and the electrode terminal 123 and enable the busbar component 14 to have a higher flow capacity.

[0195] According to some embodiments of this application, please refer to Figure 7-Figure 9 and Figure 14 The multi-layer stacked structure includes a first busbar layer 143 and a second busbar layer 144. The first busbar layer 143 is connected to the electrode terminal 123 and forms a connection area. The second busbar layer 144 includes an avoidance through-hole. The avoidance through-hole is at least partially arranged corresponding to the connection area along the first direction X. The sampling portion 132 is connected to the area of ​​the first busbar layer 143 corresponding to the avoidance through-hole along the first direction X.

[0196] Because the sampling portion 132 is connected to the area of ​​the first busbar layer 143 corresponding to the area avoiding the through-hole along the first direction X, the sampling portion 132 and the second busbar layer 144 can share a portion of the space. The overall size of the sampling portion 132, the busbar component 14, and the battery cell 12 along the first direction X is relatively small, which helps to ensure that the battery device 100 has a higher energy density.

[0197] In the above solution, in the first direction X, the sampling portion 132 and the second busbar layer 144 may share a portion of the space, which is beneficial for improving the energy density of the battery device 100 .

[0198] According to some embodiments of this application, please refer to Figure 15 The dimension of the battery cell 12 along the second direction Y is smaller than the dimension along the first direction X and larger than the dimension along the third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular. The electrode terminal 123 includes a first electrode terminal 1231 located on the first outer end surface 1213. The busbar 14 includes a first busbar 141 connected to the first electrode terminal 1231. The circuit board 13 is connected to the first electrode terminal 1231 and / or the first busbar 141. The maximum distance between the first electrode terminal 1231 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum dimension of the main body 131 along the second direction Y, and / or the maximum distance between the first busbar 141 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum dimension of the main body 131 along the second direction Y.

[0199] In some embodiments, the electrode terminal 123 further includes a second electrode terminal 1232 . The second electrode terminal 1232 is located on a surface of the housing 121 opposite to the first outer end surface 1213 along the first direction X. The second electrode terminal 1232 has opposite polarity to the first electrode terminal 1231 .

[0200] In some embodiments, the electrode terminal 123 only includes a first electrode terminal 1231 . The first electrode terminal 1231 serves as one output terminal of the battery cell 12 , and the housing 121 serves as the other output terminal of the battery cell 12 .

[0201] In some embodiments, the battery cell 12 is blade-shaped.

[0202] The maximum distance between the first electrode terminal 1231 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum dimension of the main body 131 along the second direction Y, and / or the maximum distance between the first busbar 141 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum dimension of the main body 131 along the second direction Y. This means that the main body 131 does not limit the dimensions of the first electrode terminal 1231 and / or the first busbar 141.

[0203] In the above solution, since the maximum distance between the first electrode terminal 1231 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum dimension of the main body 131 along the second direction Y, and / or the maximum distance between the first busbar component 141 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum dimension of the main body 131 along the second direction Y, a first electrode terminal 1231 of a relatively large size can be provided on the first outer end surface 1213 without affecting the arrangement of the circuit board 13. The circuit board 13 can at least partially overlap with at least one of the first busbar component 141 or the first electrode terminal 1231 along the first direction X, so that the battery device 100 has a stronger current carrying capacity and the battery device 100 has a higher energy replenishment efficiency.

[0204] According to some embodiments of this application, please refer to Figure 16 The battery cells 12 include a second outer end surface 1214 that intersects the first outer end surface 1213. Multiple battery cells 12 are stacked along a third direction Z, which is perpendicular to the second outer end surface 1214. The electrode terminal 123 is located on the second outer end surface 1214. The current collector 14 includes a first connecting segment 145 and a second connecting segment 146. The first connecting segment 145 is connected to the electrode terminal 123, and the second connecting segment 146 is connected to the circuit board 13. The first connecting segment 145 and the second connecting segment 146 intersect and connect at an angle. At least a portion of the main body 131 and at least a portion of the second connecting segment 146 are stacked along the first direction X.

[0205] At least part of the main body 131 and at least part of the second connecting section 146 are stacked along the first direction X. This means that the main body 131 does not occupy the space required by the second connecting section 146 , that is, the second connecting section 146 can be larger.

[0206] In some embodiments, the converging component 14 includes two first connecting segments 145 and a second connecting segment 146 . The second connecting segment 146 protrudes from the first connecting segment 145 along the first direction X. The converging component 14 also includes a connecting portion that connects the first connecting segment 145 and the second connecting segment 146 . The converging component 14 can be in the shape of a cross. This arrangement helps reduce the risk of short circuits between the second connecting segment 146 and the housing 121 .

[0207] In some embodiments, the battery cell 12 further includes a second electrode terminal 1232, and the first electrode terminal 1231 and the second electrode terminal 1232 have opposite polarities. Two adjacent battery cells 12 include a first battery cell 12 and a second battery cell 12. The outer shell 121 of the first battery cell 12 is provided with a recessed portion on the surface facing the outer shell 121 of the second battery cell 12 in the third direction Z. The second electrode terminal 1232 of the second battery cell 12 is at least partially located within the recessed portion. This arrangement facilitates the second electrode terminal 1232 of the second battery cell 12 to share a portion of the space with the outer shell 121 of the first battery cell 12 in the third direction Z, thereby improving the energy density of the battery device 100.

[0208] In the above scheme, multiple battery cells 12 are stacked along the third direction Z, and adjacent battery cells 12 can be electrically connected through the first connecting section 145 and the second connecting section 146. Since the first outer end surface 1213 of at least one battery cell 12 among the multiple battery cells 12 faces another battery cell 12, it is not convenient for the circuit board 13 to be connected to the first connecting section 145 located on the first outer end surface 1213. Therefore, the circuit board 13 can be electrically connected to the second connecting section 146 at the first outer end surfaces 1213 of the multiple battery cells 12 for sampling; so that the main body 131 and at least part of the second connecting section 146 are stacked along the first direction X, which is conducive to using more space on the first outer end surface 1213 along the second direction Y to increase the size of the second connecting section 146 along the second direction Y, so as to improve the current flow capacity of the first confluence component 141.

[0209] According to some embodiments of this application, please refer to Figure 16 The main body 131 is located on a side of the second connecting section 146 away from the first outer end surface 1213 .

[0210] The main body 131 is located on the side of the second connecting section 146 away from the first outer end surface 1213, which means that the setting position of the main body 131 is more flexible, the assembly difficulty of the sampling portion 132 is relatively low, and the sampling position of the battery cell 12 can be selected more flexibly.

[0211] In the above solution, by arranging the main body 131 on the side of the second connecting section 146 away from the first outer end surface 1213, when the multiple battery cells 12 are arranged along the third direction Z, the circuit board 13 can be more conveniently connected to the second connecting sections 146 of the multiple battery cells 12 for sampling.

[0212] According to some embodiments of this application, please refer to Figure 16The multiple battery cells 12 are stacked along the third direction Z, which is perpendicular to the second outer end surface 1214. The maximum distance between the second connecting segment 146 and the edge of the first outer end surface 1213 along the second direction Y is less than the maximum dimension of the main body 131 along the second direction Y. The second direction Y, the first direction X, and the third direction Z are mutually perpendicular.

[0213] The maximum distance between the second connecting section 146 and the edge of the first outer end surface 1213 along the second direction Y is smaller than the maximum size of the main body 131 along the second direction Y, which means that the arrangement of the main body 131 will not limit the size of the second connecting section 146 .

[0214] In the above scheme, by setting the maximum distance between the second connecting section 146 and the edge of the first outer end surface 1213 along the second direction Y to be smaller than the maximum size of the main body 131 along the second direction Y, part of the circuit board 13 and the second connecting section 146 can be stacked along the first direction X, and more space on the first outer end surface 1213 along the second direction Y can be used to increase the size of the second connecting section 146 along the second direction Y, thereby increasing the flow cross-sectional area of ​​the busbar component 14 and improving the flow capacity between the busbar component 14 and the electrode terminal 123.

[0215] According to some embodiments of this application, please refer to Figure 17 The busbar component 14 is connected to the electrode terminal 123 to form a welding mark 15. In the same projection plane perpendicular to the first direction X, the orthographic projection of the main body 131 and the orthographic projection of the welding mark 15 are misaligned.

[0216] In some embodiments, the circuit board 13 and the busbar assembly 14 are integrally formed. For example, the battery assembly 100 includes an insulating film, and the circuit board 13 and the busbar assembly 14 are at least partially embedded within the insulating film. In other words, the battery assembly 100 includes a first insulating film and a second insulating film, with the circuit board 13 and the busbar assembly 14 positioned between the first and second insulating films. The first insulating film is connected to the second insulating film. This arrangement eliminates the need for conventional wiring harness isolation plates, improving assembly efficiency while increasing the energy density of the battery assembly 100.

[0217] In the same projection plane perpendicular to the first direction X, the orthographic projection of the main body 131 and the orthographic projection of the weld mark 15 are misaligned, which means that even if the main body 131 and the busbar component 14 are assembled synchronously as a whole, the connection between the busbar component 14 and the electrode terminal 123 will not be interfered with.

[0218] In the above scheme, since the orthographic projection of the main body 131 and the orthographic projection of the weld mark 15 are misaligned in the same projection plane perpendicular to the first direction X, the busbar component 14 and the circuit board 13 can be assembled and combined first, and the area where the busbar component 14 and the electrode terminal 123 need to form the weld mark is reserved during assembly. Then the combined busbar component 14 and circuit board 13 are assembled and welded together with the battery cell 12, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0219] According to some embodiments of this application, please refer to Figure 17 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The first electrode terminal 1231 and the second electrode terminal 1232 are arranged at intervals along the second direction Y, and the second direction Y intersects with the first direction X. The busbar component 14 includes a first busbar component 141 and a second busbar component 142. The first busbar component 141 is connected to the first electrode terminal 1231 to form a first weld mark 151, and the second busbar component 142 is connected to the second electrode terminal 1232 to form a second weld mark 152. Along the second direction Y, the main body 131 is located between the first weld mark 151 and the second weld mark 152.

[0220] Along the second direction Y, the main body 131 is located between the first weld mark 151 and the second weld mark 152, which means that even after the main body 131 and the busbar component 14 are assembled synchronously as a whole, the connection between the first busbar component 141 and the first electrode terminal 1231 will not be interfered with, and the connection between the second busbar component 142 and the second electrode terminal 1232 will not be interfered with.

[0221] In the above scheme, along the second direction Y, the main body 131 is located between the first weld mark 151 and the second weld mark 152. The busbar component 14 and the circuit board 13 can be assembled and combined first. During assembly, an area where the busbar component 14 and the electrode terminal 123 need to form a weld mark is reserved. Then, the combined busbar component 14 and the circuit board 13 are assembled and welded together with the battery cell, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0222] According to some embodiments of this application, please refer to Figure 18 The second direction Y and the third direction Z are parallel to the first outer end surface 1213. The maximum dimension of the first outer end surface 1213 along the second direction Y is greater than the maximum dimension of the first outer end surface 1213 along the third direction Z. The electrode terminal 123 includes a first electrode terminal 1231 located on the first outer end surface 1213. The busbar 14 includes a first busbar 141. The first busbar 141 is connected to the first electrode terminal 1231 to form a first weld mark 151. Along the second direction Y, the main body 131 is located between the first weld mark 151 and the edge of the first outer end surface 1213.

[0223] Along the second direction Y, the main body 131 is located between the first weld mark 151 and the edge of the first outer end surface 1213, which means that even if the main body 131 and the busbar component 14 are assembled synchronously as a whole, the connection between the first busbar component 141 and the first electrode terminal 1231 will not be interfered with.

[0224] In the above scheme, since the main body 131 is located between the first weld mark 151 and the edge of the first outer end surface 1213 along the second direction Y, the busbar component 14 and the circuit board 13 can be assembled and combined first, and the area where the busbar component 14 and the electrode terminal 123 need to form a weld mark is reserved during assembly. Then the combined busbar component 14 and circuit board 13 are assembled and welded together with the battery cell 12, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0225] According to some embodiments of this application, please refer to Figure 17 and Figure 18 The busbar component 14 includes a positioning hole 147, and the electrode terminal 123 includes a positioning groove 1233. Along the through-going direction of the positioning hole 147, the positioning hole 147 and the positioning groove 1233 are opposite. In the same projection plane perpendicular to the first direction X, the orthographic projection of the main body 131 is misaligned with the positioning hole 147.

[0226] The positioning holes 147 and the positioning grooves 1233 serve as a positioning reference when connecting the busbar 14 and the electrode terminal 123. For example, the connection between the two is performed only when the positioning holes 147 and the positioning grooves 1233 are aligned. In some cases, this can be determined by a device such as a photoelectric sensor. This facilitates the automated production of the battery device 100.

[0227] In the same projection plane perpendicular to the first direction X, the orthographic projection of the main body 131 is misaligned with the positioning hole 147. This means that even after the main body 131 and the busbar component 14 are assembled synchronously as one piece, the positioning judgment during the connection between the first busbar component 141 and the first electrode terminal 1231 will not be invalidated due to the positioning hole 147 and / or the positioning groove 1233 being blocked by the main body 131.

[0228] In the above scheme, since the orthographic projection of the main body 131 is misaligned with the positioning hole 147 in the same projection plane perpendicular to the first direction X, the busbar component 14 and the circuit board 13 can be assembled and combined first. During assembly, the positioning hole 147 on the busbar component 14 for positioning with the electrode terminal 123 is not blocked by the circuit board 13. Then, the combined busbar component 14 and the circuit board 13 are positioned and fixed together with the battery cell 12. At this time, the positioning hole 147 and the positioning groove 1233 can be aligned along the first direction X for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0229] According to some embodiments of this application, please refer to Figure 17 The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The first electrode terminal 1231 and the second electrode terminal 1232 are arranged at intervals along the second direction Y, which intersects the first direction X. The positioning groove 1233 includes a first positioning groove 12331 located on the first electrode terminal 1231 and a second positioning groove 12332 located on the second electrode terminal 1232. Along the second direction Y, the main body 131 is located between the first positioning groove 12331 and the second positioning groove 12332.

[0230] Along the second direction Y, the main body 131 is located between the first positioning groove 12331 and the second positioning groove 12332. This means that even after the main body 131 and the busbar component 14 are assembled synchronously, the positioning judgment when the first busbar component 141 is connected to the first electrode terminal 1231, and the positioning judgment when the second busbar component 142 is connected to the second electrode terminal 1232, will not be invalidated due to the positioning groove 1233 being blocked by the main body 131.

[0231] In the above scheme, since the main body 131 is located between the first positioning groove 12331 and the second positioning groove 12332 along the second direction Y, the busbar component 14 and the circuit board 13 can be assembled and combined first. During assembly, the positioning hole 147 on the busbar component 14 for positioning with the electrode terminal 123 is not blocked by the circuit board. Then the combined busbar component 14 and the circuit board 13 are positioned and fixed together with the battery cell 12. At this time, the first positioning groove 12331 and the positioning hole 147 opposite thereto are aligned along the first direction X, and the second positioning groove 12332 and the positioning hole 147 opposite thereto are aligned along the first direction X for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0232] According to some embodiments of this application, please refer to Figure 17The electrode terminals 123 include a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The first electrode terminals 1231 and the second electrode terminals 1232 are spaced apart along the second direction Y, which intersects the first direction X. The busbar 14 includes a first busbar 141 connected to the first electrode terminal 1231 and a second busbar 142 connected to the second electrode terminal 1232. The positioning holes 147 include a first positioning hole 1471 located on the first busbar 141 and a second positioning hole 1472 located on the second busbar 142. Along the second direction Y, the main body 131 is located between the first positioning hole 1471 and the second positioning hole 1472.

[0233] Along the second direction Y, the main body 131 is located between the first positioning hole 1471 and the second positioning hole 1472. This means that even after the main body 131 and the busbar component 14 are assembled synchronously, the positioning judgment when the first busbar component 141 is connected to the first electrode terminal 1231, and the positioning judgment when the second busbar component 142 is connected to the second electrode terminal 1232, will not be invalidated due to the positioning hole 147 being blocked by the main body 131.

[0234] In the above scheme, since the main body 131 is located between the first positioning hole 1471 and the second positioning hole 1472 along the second direction Y, the busbar component 14 and the circuit board 13 can be assembled first, and the first positioning hole 1471 and the second positioning hole 1472 are not blocked by the circuit board 13 during assembly. Then the assembled busbar component 14 and the circuit board 13 are positioned and fixed together with the battery cell 12. At this time, the first positioning hole 1471 and the positioning groove 1233 opposite thereto are aligned along the first direction X, and the second positioning hole 1472 and the positioning groove 1233 opposite thereto are aligned along the first direction X for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0235] According to some embodiments of this application, please refer to Figure 18 The second direction Y and the third direction Z are parallel to the first outer end surface 1213. The maximum dimension of the first outer end surface 1213 along the second direction Y is greater than the maximum dimension of the first outer end surface 1213 along the third direction Z. The battery cell 12 includes a first electrode terminal 1231 located on the first outer end surface 1213. The positioning groove 1233 includes a first positioning groove 12331 located on the first electrode terminal 1231. Along the second direction Y, the main body 131 is located between the first positioning groove 12331 and the edge of the first outer end surface 1213.

[0236] Along the second direction Y, the main body 131 is located between the first positioning groove 12331 and the edge of the first outer end surface 1213. This means that even after the main body 131 and the busbar component 14 are assembled together, the positioning judgment during the connection between the first busbar component 141 and the first electrode terminal 1231 will not be invalidated due to the first positioning groove 12331 being blocked by the main body 131.

[0237] In the above scheme, since the main body 131 is located between the first positioning groove 12331 and the edge of the first outer end surface 1213 along the second direction Y, the busbar component 14 and the circuit board 13 can be assembled first, and the first positioning groove 12331 is not blocked by the circuit board 13 during assembly. Then the combined busbar component 14 and the circuit board 13 are positioned and fixed together with the battery cell 12. At this time, the first positioning groove 12331 and the positioning hole 147 opposite to it can be aligned along the first direction X for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0238] According to some embodiments of this application, please refer to Figure 18 The second direction Y and the third direction Z are parallel to the first outer end surface 1213. The maximum dimension of the first outer end surface 1213 along the second direction Y is greater than the maximum dimension of the first outer end surface 1213 along the third direction Z. The battery cell 12 includes a first electrode terminal 1231 and a first busbar 141 located on the first outer end surface 1213. The first busbar 141 is connected to the first electrode terminal 1231. The positioning hole 147 includes a first positioning hole 1471 located on the first busbar 141. Along the second direction Y, the main body 131 is located between the first positioning hole 1471 and the edge of the first outer end surface 1213.

[0239] Along the second direction Y, the main body 131 is located between the first positioning hole 1471 and the edge of the first outer end surface 1213. This means that even after the main body 131 and the busbar component 14 are assembled together, the positioning judgment during the connection between the first busbar component 141 and the first electrode terminal 1231 will not be invalidated due to the first positioning hole 1471 being blocked by the main body 131.

[0240] In the above scheme, since the main body 131 is located between the first positioning hole 1471 and the edge of the first outer end surface 1213 along the second direction Y, the busbar component 14 and the circuit board 13 can be assembled first, and the first positioning hole 1471 is not blocked by the circuit board 13 during assembly. Then the combined busbar component 14 and the circuit board 13 are positioned and fixed together with the battery cell 12. At this time, the first positioning hole 1471 and the positioning groove 1233 opposite to it can be aligned along the first direction X for rapid assembly, which is conducive to speeding up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery cell 12.

[0241] According to some embodiments of this application, please refer to Figure 1 The present application provides an electrical device, which includes the battery device 100 in one or more of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0242] In the above solution, since the battery device 100 in one or more of the above embodiments has a high energy replenishment efficiency, the electrical device including the battery device 100 in one or more of the above embodiments has a high energy replenishment efficiency.

[0243] According to some embodiments of this application, please refer to Figure 4-Figure 6 and Figure 17 The present application provides a battery device 100, which includes a plurality of battery cells 12, a busbar component 14 and a circuit board 13. The battery cells 12 include a shell 121 and an electrode terminal 123, wherein at least a portion of a main body 131 and at least a portion of the busbar component 14 are stacked along a first direction X, and the first direction X intersects with a first outer end surface 1213, and / or at least a portion of the main body 131 and at least a portion of the electrode terminal 123 are stacked along the first direction X, and the first direction X intersects with the first outer end surface 1213.

[0244] The electrode terminals 123 include a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end surface 1213. The first electrode terminals 1231 and the second electrode terminals 1232 are spaced apart along a second direction Y, which intersects the first direction X. The maximum distance between the first electrode terminals 1231 and the second electrode terminals 1232 along the second direction Y is less than the maximum dimension of the main body 131 along the second direction Y. The maximum distance between the two furthest points of the outer contours of the first electrode terminal 1231 and the second electrode terminal 1232 in the second direction Y is greater than or equal to the maximum dimension of the circuit board 13 along the second direction Y. At least a portion of each of the first electrode terminal 1231 and the second electrode terminal 1232 is arranged to overlap with the main body 131 along the first direction X.

[0245] The circuit board 13 is mounted on the first outer end surface 1213 of the housing 121. The circuit board 13 includes a main body 131 and multiple sampling portions 132. One end of each sampling portion 132 is connected to the main body 131, and the other end is connected to the current collector 14 or the battery cell 12. At least one sampling portion 132 protrudes from an edge of the main body 131 along the second direction Y and completely overlaps with the current collector 14 along the first direction X.

[0246] The busbar component 14 includes a first busbar component 141 and a second busbar component 142. The first busbar component 141 is used to connect to the first electrode terminal 1231, and the second busbar component 142 is used to connect to the second electrode terminal 1232. The first busbar components 141 and the second busbar components 142 are spaced apart along the second direction Y. The maximum distance between the first busbar components 141 and the second busbar components 142 along the second direction Y is less than the maximum distance between the main body 131 along the second direction Y. The first busbar component 141 and the second busbar component 142 are at least partially arranged to overlap with the main body 131 along the first direction X. The first busbar component 141 and the second busbar component 142 are at least partially arranged to overlap with the main body 131 along the first direction X.

[0247] The busbar component 14 includes a positioning hole 147, and the electrode terminal 123 includes a positioning groove 1233. Along the through-direction of the positioning hole 147, the positioning hole 147 and the positioning groove 1233 are opposite each other. The positioning grooves 1233 include a first positioning groove 12331 located on the first electrode terminal 1231 and a second positioning groove 12332 located on the second electrode terminal 1232. Along the second direction Y, the main body 131 is located between the first positioning groove 12331 and the second positioning groove 12332. The positioning holes 147 include a first positioning hole 1471 located on the first busbar component 141 and a second positioning hole 1472 located on the second busbar component 142. Along the second direction Y, the main body 131 is located between the first positioning hole 1471 and the second positioning hole 1472. The first busbar 141 is connected to the first electrode terminal 1231 to form a first weld mark 151 , and the second busbar 142 is connected to the second electrode terminal 1232 to form a second weld mark 152 . Along the second direction Y, the main body 131 is located between the first weld mark 151 and the second weld mark 152 .

[0248] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, each comprising a housing and electrode terminals, wherein the electrode terminals are disposed on the housing; a busbar component connected to the electrode terminal, the busbar component being used to realize electrical connection of the plurality of battery cells; a circuit board, disposed on the first outer end surface of the housing, comprising a main body and a sampling portion, wherein one end of the sampling portion is connected to the main body, and the other end is connected to the current collecting component or the battery cell; In which, at least part of the main body and at least part of the busbar component are stacked along a first direction, and the first direction intersects with the first outer end surface, and / or at least part of the main body and at least part of the electrode terminal are stacked along a first direction, and the first direction intersects with the first outer end surface.

2. The battery device according to claim 1, wherein: The electrode terminals include a first electrode terminal and a second electrode terminal located on the first outer end surface; The first electrode terminal and the second electrode terminal are arranged at intervals along a second direction, the second direction intersects the first direction, and the maximum distance between the first electrode terminal and the second electrode terminal along the second direction is smaller than the maximum dimension of the main body along the second direction.

3. The battery device according to claim 2, characterized in that A maximum distance between two farthest points of an outer contour of the first electrode terminal and an outer contour of the second electrode terminal in the second direction is greater than or equal to a maximum dimension of the circuit board along the second direction.

4. The battery device according to claim 1, wherein: The electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface, and at least a portion of the first electrode terminal and the second electrode terminal are stacked with the main body along the first direction.

5. The battery device according to claim 1, wherein: The electrode terminals include a first electrode terminal and a second electrode terminal located on the first outer end surface, and the first electrode terminal and the second electrode terminal are arranged at intervals along the second direction. The circuit board includes a plurality of sampling portions, at least one of which protrudes from an edge of the main body on one side along the second direction and is completely stacked with the busbar component along the first direction.

6. The battery device according to claim 1, wherein: The electrode terminals include a first electrode terminal and a second electrode terminal located on the first outer end surface; The busbar component includes a first busbar component and a second busbar component, the first busbar component is used to connect the first electrode terminal, the second busbar component is used to connect the second electrode terminal, the first busbar component and the second busbar component are arranged at intervals along the second direction, and the maximum distance between the first busbar component and the second busbar component along the second direction is smaller than the maximum dimension of the main body along the second direction.

7. The battery device according to claim 1, wherein: The electrode terminal includes a first electrode terminal and a second electrode terminal located on the first outer end surface, and the busbar component includes a first busbar component and a second busbar component, the first busbar component is used to connect the first electrode terminal, and the second busbar component is used to connect the second electrode terminal, and the first busbar component and the second busbar component are at least partially stacked with the main body along the first direction.

8. The battery device according to any one of claims 1 to 7, characterized in that: The current collecting component is at least partially folded along a second direction to form a multi-layer stacked structure, and the second direction intersects with the first direction.

9. The battery device according to any one of claims 1 to 7, characterized in that: The circuit board includes a plurality of main bodies stacked along the first direction; At least one of the plurality of main bodies is stacked with at least a portion of the busbar members along the first direction, and / or at least one of the plurality of main bodies is stacked with at least a portion of the electrode terminals along the first direction.

10. The battery device according to claim 1, wherein: At least a portion of the circuit board is located between the current collecting member and the first outer end surface.

11. The battery device according to claim 10, characterized in that The main body portion and / or the sampling portion of the circuit board is located between the confluence component and the first outer end surface.

12. The battery device according to claim 1 or 10, characterized in that: The circuit board further includes a temperature measuring component connected to at least one sampling line of the circuit board. The temperature measuring component is at least partially disposed on a surface of the circuit board facing the first outer end surface.

13. The battery device according to claim 1 or 10, characterized in that: The circuit board includes a signal lead-out plug, and the signal lead-out plug is connected to a sampling line on the circuit board on a surface of the circuit board facing the first outer end surface.

14. The battery device according to claim 1 or 10, characterized in that: The sampling portion includes a pad connected to the current collecting component.

15. The battery device according to claim 8, wherein: The multi-layer stacked structure includes a first busbar layer and a second busbar layer, the first busbar layer is connected to the electrode terminal and forms a connection area, the second busbar layer includes an avoidance through-hole, and the avoidance through-hole is at least partially arranged corresponding to the connection area along the first direction, and the second busbar layer is located on the side of the first busbar layer away from the first outer end surface.

16. The battery device according to claim 8, characterized in that The multi-layer stacked structure includes a first busbar layer and a second busbar layer, the first busbar layer is connected to the electrode terminal and forms a connection area, the second busbar layer includes an avoidance through-hole, and the avoidance through-hole is at least partially arranged corresponding to the connection area along the first direction, and the sampling portion is connected to an area on the first busbar layer corresponding to the avoidance through-hole along the first direction.

17. The battery device according to claim 1, wherein: The dimension of the battery cell along the second direction is smaller than the dimension along the first direction and larger than the dimension along the third direction, the first direction, the second direction and the third direction are perpendicular to each other, the electrode terminal includes a first electrode terminal located on the first outer end surface, and the busbar component includes a first busbar component connected to the first electrode terminal; The circuit board is connected to the first electrode terminal and / or the first busbar component; The maximum distance between the first electrode terminal and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction, and / or the maximum distance between the first busbar component and the edge of the first outer end surface along the second direction is smaller than the maximum dimension of the main body along the second direction.

18. The battery device according to claim 1, wherein: The battery cell includes a second outer end surface intersecting with the first outer end surface, and a plurality of the battery cells are stacked along a third direction, and the third direction is perpendicular to the second outer end surface; The electrode terminal is located on the second outer end surface, and the current collecting component includes a first connecting section and a second connecting section, the first connecting section is connected to the electrode terminal, and the second connecting section is connected to the circuit board, and the first connecting section and the second connecting section intersect and connect at an angle; At least a portion of the main body and at least a portion of the second connecting section are stacked along a first direction.

19. The battery device according to claim 18, wherein: The main body is located on a side of the second connecting section away from the first outer end surface.

20. The battery device according to claim 18 or 19, characterized in that: A maximum distance between the second connecting section and an edge of the first outer end surface along the second direction is smaller than a maximum dimension of the main body along the second direction, and the second direction, the first direction and the third direction are perpendicular to each other.

21. The battery device according to claim 1, wherein: The busbar component is connected to the electrode terminal to form a weld mark, and in the same projection plane perpendicular to the first direction, the orthographic projection of the main body and the orthographic projection of the weld mark are misaligned.

22. The battery device according to claim 21, characterized in that The electrode terminals include a first electrode terminal and a second electrode terminal located on the first outer end surface, the first electrode terminal and the second electrode terminal are arranged at intervals along a second direction, and the second direction intersects the first direction. The busbar component includes a first busbar component and a second busbar component, the first busbar component is connected to the first electrode terminal to form a first weld mark, and the second busbar component is connected to the second electrode terminal to form a second weld mark; Along the second direction, the main body is located between the first weld mark and the second weld mark.

23. The battery device according to claim 21, characterized in that The second direction and the third direction are parallel to the first outer end surface, the maximum dimension of the first outer end surface along the second direction is greater than the maximum dimension of the first outer end surface along the third direction, the electrode terminal includes a first electrode terminal located on the first outer end surface, the busbar component includes a first busbar component, and the first busbar component is connected to the first electrode terminal to form a first weld mark; Along the second direction, the main body is located between the first weld mark and the edge of the first outer end surface.

24. The battery device according to claim 1, wherein: The current collecting component includes a positioning hole, and the electrode terminal includes a positioning groove, and along the through direction of the positioning hole, the positioning hole and the positioning groove are opposite to each other; In the same projection plane perpendicular to the first direction, the orthographic projection of the main body is misaligned with the positioning hole.

25. The battery device according to claim 24, characterized in that The electrode terminals include a first electrode terminal and a second electrode terminal located on a first outer end surface, the first electrode terminal and the second electrode terminal are arranged at intervals along a second direction, and the second direction intersects the first direction; The positioning groove includes a first positioning groove located on the first electrode terminal and a second positioning groove located on the second electrode terminal. Along the second direction, the main body is located between the first positioning groove and the second positioning groove.

26. The battery device according to claim 24, characterized in that The electrode terminals include a first electrode terminal and a second electrode terminal located on a first outer end surface, the first electrode terminal and the second electrode terminal are arranged at intervals along a second direction, and the second direction intersects the first direction; The busbar member includes a first busbar member connected to the first electrode terminal and a second busbar member connected to the second electrode terminal; The positioning holes include a first positioning hole located on the first confluence component and a second positioning hole located on the second confluence component. Along the second direction, the main body is located between the first positioning hole and the second positioning hole.

27. The battery device according to claim 24, characterized in that The second direction and the third direction are parallel to the first outer end surface, the maximum dimension of the first outer end surface along the second direction is greater than the maximum dimension of the first outer end surface along the third direction, the battery cell includes a first electrode terminal located on the first outer end surface, and the positioning groove includes a first positioning groove located on the first electrode terminal; Along the second direction, the main body is located between the first positioning groove and the edge of the first outer end surface.

28. The battery device according to claim 24, wherein: The second direction and the third direction are parallel to the first outer end surface, the maximum dimension of the first outer end surface along the second direction is greater than the maximum dimension of the first outer end surface along the third direction, the battery cell includes a first electrode terminal and a first busbar located on the first outer end surface, the first busbar is connected to the first electrode terminal, and the positioning hole includes a first positioning hole located on the first busbar; Along the second direction, the main body is located between the first positioning hole and the edge of the first outer end surface.

29. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 28, wherein the battery device is used to provide electrical energy.

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