Battery apparatus and electrical apparatus

Abstract

The present application relates to the technical field of batteries, and discloses a battery apparatus and an electrical apparatus. The battery apparatus comprises a plurality of battery cells, a busbar component, and a circuit board. Each battery cell comprises a housing and electrode terminals, the electrode terminals being provided on the housing. The busbar component is connected to the electrode terminals, and is used to electrically connect the plurality of battery cells. The circuit board is disposed on a first outer end surface of each housing. The circuit board comprises a main body portion and a sampling portion. One end of the sampling portion is connected to the main body portion, and the other end of the sampling portion is connected to the busbar component or the battery cells. At least a portion of the main body portion and at least a portion of the busbar component are stacked in a first direction, the first direction intersecting the first outer end surfaces; and / or, at least a portion of the main body portion and at least a portion of the electrode terminals are stacked in the first direction, the first direction intersecting the first outer end surfaces. The battery apparatus has high energy-replenishment efficiency.

Description

Battery device and electric device TECHNICAL FIELD

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

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] How to improve the energy compensation efficiency of the battery device is a problem to be solved in the battery technology.

[0004] SUMMARY

[0005] In view of the above problems, the present application provides a battery device and an electric device, which can improve the energy compensation efficiency of the battery device.

[0006] In a first aspect, the present application provides a battery device, which comprises a plurality of battery monomers, a current collecting component and a circuit board. The battery monomer comprises a shell and an electrode terminal, and the electrode terminal is arranged on the shell. The current collecting component is connected to the electrode terminal, and the current collecting component is used to realize the electrical connection of the plurality of battery monomers. The circuit board is arranged on a first outer end surface of the shell, and the circuit board 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 current collecting component or the battery monomer. At least part of the main body part and at least part of the current collecting component are arranged in a first direction, the first direction intersects the first outer end surface, and / or at least part of the main body part and at least part of the electrode terminal are arranged in the first direction, the first direction intersects the first outer end surface.

[0007] In the above technical solution, since the area of the first outer end surface is limited, when the main body part and the current collecting component and / or the electrode terminal are arranged in the first direction, it is beneficial to arrange the current collecting component with larger size on the first outer end surface, thereby improving the current carrying capacity of the current collecting component. The electrode terminal with larger size can also be arranged in the direction parallel to the first outer end surface, thereby improving the current carrying capacity of the electrode terminal. In some embodiments, the size of the current collecting component and the electrode terminal can also be increased at the same time, thereby improving the current carrying capacity between the electrode terminal and the current collecting component, and improving the energy compensation efficiency of the battery device. Moreover, the electrode terminal and / or the current collecting component with larger size also improves the connection stability between them.

[0008] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face. The first electrode terminal and the second electrode terminal are spaced apart along a second direction intersecting the first direction, and a maximum distance of the first electrode terminal and the second electrode terminal along the second direction is less than a maximum dimension of the body portion along the second direction.

[0009] In the above scheme, since the maximum distance of the first electrode terminal and the second electrode terminal along the second direction is less than the maximum dimension of the body portion along the second direction, the body portion can at least partially overlap at least one of the first electrode terminal and the second electrode terminal in the first direction, and the distance of the first electrode terminal and the second electrode terminal on the first outer end face can be reduced to set the first electrode terminal and the second electrode terminal with relatively large sizes, so that the battery device has a stronger overcurrent capacity. When the distance of the first electrode terminal and the second electrode terminal on the first outer end face is reduced, since the body portion can at least partially overlap at least one of the first electrode terminal and the second electrode terminal in the first direction, the size of the body portion is not affected.

[0010] In one or more embodiments of the first aspect, a maximum distance between two most distant 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.

[0011] In the above scheme, since the maximum distance between the two most distant 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 dimension of the circuit board along the second direction, the circuit board is facilitated to be connected to the electrode terminals for signal sampling by setting the connecting portion at the edge in the width direction of the circuit board.

[0012] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face, and the first electrode terminal and the second electrode terminal are both at least partially stacked with the body portion along the first direction.

[0013] In the above scheme, since the first electrode terminal and the second electrode terminal are both at least partially stacked with the body portion along the first direction, the body portion can be arranged using the outer end face of the first electrode terminal and the second electrode terminal in the height direction at the same time, which is beneficial to expand the circuit board arrangement space for increasing the width dimension of the body portion. Alternatively, the distance between the first electrode terminal and the second electrode terminal can be smaller without affecting the size of the body portion in the case of limited space on the first outer end face.

[0014] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face, the first electrode terminal and the second electrode terminal are arranged apart along the second direction, the circuit board includes a plurality of sampling portions, at least one sampling portion protrudes from an edge of the main portion on one side along the second direction and is completely laminated with the busbar component along the first direction.

[0015] In the above scheme, the sampling portion can be laminated with the busbar component along the first direction, so that the sampling portion does not solely occupy the size space of the first outer end face along the second direction, and the size space of the first outer end face along the second direction can be used to increase the size of the busbar component along the second direction, so as to improve the current carrying capacity between the busbar component and the electrode terminal.

[0016] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face. 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 apart along the second direction, and the maximum distance of the first busbar component and the second busbar component along the second direction is less than the maximum size of the main portion along the second direction.

[0017] In the above scheme, since the main portion can partially overlap with at least one of the first busbar component and the second busbar component along the second direction, the distance between the first busbar component and the second busbar component along the second direction can be reduced, so that the maximum distance of the first busbar component and the second busbar component along the second direction is less than the maximum size of the main portion along the second direction. In this way, the size of at least one of the first busbar component or the second busbar component can be relatively large, and at least one of the first busbar component or the second busbar component has a strong current carrying capacity, which is beneficial to improve the energy compensation efficiency of the battery device.

[0018] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face, 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, and the first busbar component and the second busbar component are both at least partially laminated with the main portion along the first direction.

[0019] In the above scheme, since the first busbar component and the second busbar component are both at least partially laminated with the main portion along the first direction, the first busbar component, the second busbar component and the main portion do not need to be arranged along the second direction in turn, so that the first busbar component and the second busbar component can shorten the distance along the second direction, and more space of the first outer end face can be used to increase the size of the first busbar component and the second busbar component, so that the current carrying capacity of the busbar component can be improved.

[0020] In one or more embodiments of the first aspect, the current collecting component is folded at least partially along the second direction to form a multi-layered stack structure.

[0021] In the above scheme, since the current collecting component is folded at least partially along the second direction to form a multi-layered stack structure, the overcurrent capacity of the current collecting component can be improved while occupying less space in the second direction.

[0022] In one or more embodiments of the first aspect, the circuit board comprises a plurality of main body portions stacked along the first direction. At least one of the plurality of main body portions is stacked along the first direction with at least part of the current collecting component, and / or at least one of the plurality of main body portions is stacked along the first direction with at least part of the electrode terminal.

[0023] In the above scheme, in the case where the space along the second direction of the first outer end surface is limited, in order to arrange more sampling portions while making the circuit board have a higher circuit density, the circuit board can be provided in the form of comprising a plurality of main body portions stacked along the first direction. At this time, at least one of the plurality of main body portions is stacked along the first direction with at least part of the current collecting component, and / or at least one of the plurality of main body portions is stacked along the first direction with at least part of the electrode terminal, which is advantageous for making part of the main body portions and the current collecting component and / or the electrode terminal not share space in the direction parallel to the first outer end surface, thereby arranging a larger size of the current collecting component and / or the electrode terminal, and making the battery device have a higher overcurrent capacity.

[0024] In one or more embodiments of the first aspect, at least part of the circuit board is located between the current collecting component and the first outer end surface.

[0025] In the above scheme, since at least part of the circuit board is located between the current collecting component and the first outer end surface, part of the circuit board can be arranged in the gap formed between the current collecting component and the first outer end surface along the first direction, so that the space at the gap is utilized, which is advantageous for improving the energy density of the battery device while arranging a larger size of the current collecting component to improve the overcurrent capacity of the battery device.

[0026] 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 collecting component and the first outer end surface.

[0027] In the above scheme, by arranging the main body portion and / or the sampling portion between the current collecting component and the first outer end surface, the gap formed between the current collecting component and the first outer end surface can be utilized, thereby making the battery device have a higher energy density.

[0028] In one or more embodiments of the first aspect, the circuit board further comprises a temperature measuring assembly connected to at least one sampling line of the circuit board, and the temperature measuring assembly is at least partially arranged on the surface of the circuit board facing the first outer end surface.

[0029] In the above scheme, since the temperature measuring component generally has a certain thickness, by arranging at least part of the temperature measuring component on the surface of the circuit board facing the first outer end face, the temperature measuring component can be accommodated in the space between the circuit board and the first outer end face, which is conducive to improving the space utilization to increase the energy density of the battery device.

[0030] In one or more embodiments of the first aspect, the circuit board comprises a signal lead-out plug, the signal lead-out plug being connected to the sampling line on the circuit board at the surface of the circuit board facing the first outer end face.

[0031] In the above scheme, since the signal lead-out plug generally has a certain thickness, by arranging at least part of the signal lead-out plug on the surface of the circuit board facing the first outer end face, the signal lead-out plug can be accommodated in the space between the circuit board and the first outer end face, which is conducive to improving the space utilization to increase the energy density of the battery device.

[0032] In one or more embodiments of the first aspect, the sampling part comprises a solder pad, the solder pad being connected to the busbar component.

[0033] In the above scheme, compared with the way that the sampling part is connected to the busbar component through the adapter stacked along the first direction with the main body part, the sampling part is directly connected to the busbar component through the solder pad, which can reduce the space size occupied by the circuit board in the first direction, thereby improving the energy density of the battery device.

[0034] In one or more embodiments of the first aspect, the multi-layer stacked structure comprises a first busbar sheet layer and a second busbar sheet layer, the first busbar sheet layer being connected to the electrode terminal and forming a connection area, the second busbar sheet layer comprising a relief through hole, the relief through hole being at least partially arranged corresponding to the connection area along the first direction, the second busbar sheet layer being located on the side of the first busbar sheet layer away from the first outer end face.

[0035] In the above scheme, the arrangement of the first busbar sheet layer and the second busbar sheet layer can make the busbar component have a larger flow cross-sectional area, and in the multi-layer stacked structure, only the first busbar sheet layer needs to be connected to the electrode terminal to realize the electrical connection between the busbar component and the electrode terminal. At the same time, since the second busbar sheet layer comprises a relief through hole arranged corresponding to the connection area, the connection of the first busbar sheet layer and the electrode terminal can be made at the position of the relief through hole, which can reduce the welding difficulty of the multi-layer stacked structure and the electrode terminal and make the busbar component have higher flow capacity.

[0036] In one or more embodiments of the first aspect, the multi-layered stack structure comprises a first busbar layer and a second busbar layer, the first busbar layer is connected to the electrode terminal and forms a connection region, the second busbar layer comprises a bypass hole, the bypass hole is at least partially arranged in correspondence with the connection region along the first direction, and the sampling portion is connected to the first busbar layer and corresponds to the region of the bypass hole along the first direction.

[0037] In the above scheme, the sampling portion can share part of the space with the second busbar layer along the first direction, which is conducive to improving the energy density of the battery device.

[0038] In one or more embodiments of the first aspect, the battery cell has a size along the second direction that is smaller than a size along the first direction and larger than a size along the third direction, the first direction, the second direction, and the third direction are perpendicular to each other in pairs, the electrode terminal comprises a first electrode terminal located at the first outer end surface, and the busbar component comprises 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 size of the main body portion 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 size of the main body portion along the second direction.

[0039] 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 size of the main body portion 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 size of the main body portion along the second direction; the first electrode terminal with 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 the first busbar component or the first electrode terminal along the first direction, so that the battery device has a higher energy compensation efficiency.

[0040] In one or more embodiments of the first aspect, the battery cell comprises a second outer end surface intersecting the first outer end surface, and a plurality of battery cells are arranged in a stacked manner along the third direction, the third direction being perpendicular to the second outer end surface. The electrode terminal is located at the second outer end surface, the busbar component comprises a first connecting segment and a second connecting segment, the first connecting segment is connected to the electrode terminal, and the second connecting segment is connected to the circuit board. The first connecting segment and the second connecting segment are angularly intersected and connected. At least part of the main body portion and at least part of the second connecting segment are arranged in a stacked manner along the first direction.

[0041] In the scheme, the plurality of battery monomers are stacked along the third direction, and adjacent battery monomers can be electrically connected through the first connecting section and the second connecting section. Since the first outer end surface of at least one of the plurality of battery monomers faces another battery monomer, the circuit board is not convenient to connect the first connecting section at the first outer end surface, and therefore the circuit board can be electrically connected to the second connecting section at the first outer end surface of the plurality of battery monomers for sampling; the main body part and at least part of the second connecting section are stacked along the first direction, which is beneficial to use more space along the second direction on the first outer end surface to increase the size of the second connecting section along the second direction, so as to improve the overcurrent capacity of the first busbar component.

[0042] In one or more embodiments of the first aspect, the main body part is located on a side of the second connecting section away from the first outer end surface.

[0043] In the scheme, by arranging the main body part on the side of the second connecting section away from the first outer end surface, when the plurality of battery monomers are arranged along the third direction, the circuit board can be more convenient to connect the second connecting section of the plurality of battery monomers for sampling.

[0044] In one or more embodiments of the first aspect, the maximum distance of the edge of the second connecting section from the first outer end surface along the second direction is less than the maximum size of the main body part along the second direction, and the second direction, the first direction and the third direction are perpendicular to each other.

[0045] In the scheme, by arranging the maximum distance of the edge of the second connecting section from the first outer end surface along the second direction to be less than the maximum size of the main body part along the second direction, part of the circuit board can be stacked along the first direction with the second connecting section, and then more space along the second direction on the first outer end surface can be used to increase the size of the second connecting section along the second direction, so as to improve the overcurrent area of the busbar component and improve the overcurrent capacity of the busbar component.

[0046] In one or more embodiments of the first aspect, the busbar component is connected with the electrode terminal to form a welding mark, and in the same projection plane perpendicular to the first direction, the orthographic projection of the main body part is dislocated from the orthographic projection of the welding mark.

[0047] In the scheme, in the same projection plane perpendicular to the first direction, the orthographic projection of the main body part is dislocated from the orthographic projection of the welding mark. The busbar component and the circuit board can be assembled first, and the area where the welding mark needs to be formed between the busbar component and the electrode terminal is reserved during assembly. Then the assembled busbar component and circuit board are assembled and welded with the battery monomer together, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar component and the battery monomer.

[0048] In one or more embodiments of the first aspect, the electrode terminal includes a first electrode terminal and a second electrode terminal located at the first outer end face, the first electrode terminal and the second electrode terminal are arranged in a second direction, 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 with the first electrode terminal to form a first solder joint, and the second busbar component is connected with the second electrode terminal to form a second solder joint; along the second direction, the main body portion is located between the first solder joint and the second solder joint.

[0049] In the above scheme, along the second direction, the main body portion is located between the first solder joint and the second solder joint, the busbar component and the circuit board can be assembled first, and the area where the busbar component and the electrode terminal need to form the solder joint is reserved during assembly, then the assembled busbar component and the circuit board are assembled and welded with the battery monomer together, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar component and the battery monomer.

[0050] In one or more embodiments of the first aspect, the second direction and the third direction are parallel to the first outer end face, the maximum dimension of the first outer end face along the second direction is greater than the maximum dimension of the first outer end face along the third direction, the electrode terminal includes a first electrode terminal located at the first outer end face, and the busbar component includes a first busbar component, the first busbar component is connected with the first electrode terminal to form a first solder joint. Along the second direction, the main body portion is located between the first solder joint and the edge of the first outer end face.

[0051] In the above scheme, along the second direction, the main body portion is located between the first solder joint and the edge of the first outer end face, the busbar component and the circuit board can be assembled first, and the area where the busbar component and the electrode terminal need to form the solder joint is reserved during assembly, then the assembled busbar component and the circuit board are assembled and welded with the battery monomer together, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar component and the battery monomer.

[0052] In one or more embodiments of the first aspect, the busbar component includes a positioning hole, the electrode terminal includes a positioning groove, along the through direction of the positioning hole, the positioning hole is opposite to the positioning groove. In the same projection plane perpendicular to the first direction, the orthographic projection of the main body portion is misaligned with the positioning hole.

[0053] In the above scheme, in the same projection plane perpendicular to the first direction, the orthographic projection of the main body portion is misaligned with the positioning hole, the busbar component and the circuit board can be assembled first, and the positioning hole on the busbar component for positioning with the electrode terminal is not blocked by the circuit board during assembly, then the assembled busbar component and the circuit board are positioned and fixed with the battery monomer together, at this time, the fast assembly can be performed according to the alignment of the positioning hole and the positioning groove along the first direction, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar component and the battery monomer.

[0054] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face, the first electrode terminal and the second electrode terminal are arranged spaced apart along a second direction, 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 portion is located between the first positioning groove and the second positioning groove.

[0055] In the above scheme, since along the second direction, the main body portion is located between the first positioning groove and the second positioning groove, the busbar assembly and the circuit board can be assembled first, and during assembly, the positioning hole on the busbar assembly for positioning with the electrode terminal is not blocked by the circuit board, then the assembled busbar assembly and the circuit board are positioned and fixed with the battery monomer, 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, so that the assembly is fast, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar assembly and the battery monomer.

[0056] In one or more embodiments of the first aspect, the electrode terminals include a first electrode terminal and a second electrode terminal located at the first outer end face, the first electrode terminal and the second electrode terminal are arranged spaced apart along a second direction, the second direction intersects the first direction. The busbar assembly includes a first busbar assembly connected with the first electrode terminal and a second busbar assembly connected with the second electrode terminal. The positioning hole includes a first positioning hole located on the first busbar assembly and a second positioning hole located on the second busbar assembly, along the second direction, the main body portion is located between the first positioning hole and the second positioning hole.

[0057] In the above scheme, since along the second direction, the main body portion is located between the first positioning hole and the second positioning hole, the busbar assembly and the circuit board can be assembled first, and during assembly, the first positioning hole and the second positioning hole are not blocked by the circuit board, then the assembled busbar assembly and the circuit board are positioned and fixed with the battery monomer, at this time, the first positioning hole and the positioning hole opposite to it can be aligned along the first direction, and the second positioning hole and the positioning hole opposite to it can be aligned along the first direction, so that the assembly is fast, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar assembly and the battery monomer.

[0058] In one or more embodiments of the first aspect, the second direction and the third direction are parallel to the first outer end face, the maximum dimension of the first outer end face along the second direction is greater than the maximum dimension of the first outer end face along the third direction, the battery monomer includes a first electrode terminal located at the first outer end face, and the positioning groove includes a first positioning groove located on the first electrode terminal. Along the second direction, the main body portion is located between the first positioning groove and the edge of the first outer end face.

[0059] In the scheme, the main body part is located between the first positioning slot and the edge of the first outer end surface along the second direction, so that the busbar assembly and the circuit board can be assembled and combined first, the first positioning slot is not blocked by the circuit board during assembly, and then the combined busbar assembly and circuit board are positioned and fixed with the battery monomer, at this time, the first positioning slot and the positioning hole opposite thereto can be aligned along the first direction for rapid assembly, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar assembly and the battery monomer.

[0060] In one or more embodiments of the first aspect, the second direction and the third direction are parallel to the first outer end surface, a maximum dimension of the first outer end surface along the second direction is greater than a maximum dimension of the first outer end surface along the third direction, the battery monomer includes a first electrode terminal located on the first outer end surface and a first busbar assembly connected to the first electrode terminal, and the positioning hole includes a first positioning hole located on the first busbar assembly. Along the second direction, the main body part is located between the first positioning hole and the edge of the first outer end surface.

[0061] In the scheme, the main body part is located between the first positioning slot and the edge of the first outer end surface along the second direction, so that the busbar assembly and the circuit board can be assembled and combined first, the first positioning slot is not blocked by the circuit board during assembly, and then the combined busbar assembly and circuit board are positioned and fixed with the battery monomer, at this time, the first positioning slot and the positioning hole opposite thereto can be aligned along the first direction for rapid assembly, which is beneficial to speed up the assembly rhythm of the circuit board, the busbar assembly and the battery monomer.

[0062] In a second aspect, the application provides a power consumption device including the battery device in one or more embodiments.

[0063] In the scheme, the battery device in one or more embodiments has a high energy compensation efficiency, so that the power consumption device including the battery device in one or more embodiments also has a high energy compensation efficiency.

[0064] The above description is only a summary of the technical scheme of the application. In order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0065] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting on the application. Moreover, the same reference numbers are used throughout the drawings to represent the same components. In the drawings:

[0066] FIG. 1 is a structural schematic view of a vehicle according to some embodiments of the present application;

[0067] FIG. 2 is an exploded view of a battery device according to some embodiments of the present application;

[0068] FIG. 3 is an exploded view of a battery cell according to some embodiments of the present application;

[0069] FIG. 4 is a cross-sectional view of a battery cell according to some embodiments of the present application;

[0070] FIG. 5 is a partial enlarged view of A in FIG. 4;

[0071] FIG. 6 is a schematic view of a partial structure of a battery device according to some embodiments of the present application;

[0072] FIG. 7 is a schematic view of a partial structure of a battery device according to further embodiments of the present application;

[0073] FIG. 8 is a partial enlarged view of B in FIG. 7;

[0074] FIG. 9 is a partial schematic view of a current collecting member according to some embodiments of the present application;

[0075] FIG. 10 is a cross-sectional view of a partial structure of a battery device according to some embodiments of the present application;

[0076] FIG. 11 is a partial enlarged view of C in FIG. 10;

[0077] FIG. 12 is a cross-sectional view of a partial structure of a battery device according to further embodiments of the present application;

[0078] FIG. 13 is a cross-sectional view of a partial structure of a battery device according to still further embodiments of the present application;

[0079] FIG. 14 is a cross-sectional view of a partial structure of a battery device according to yet further embodiments of the present application;

[0080] FIG. 15 is a structural schematic view of a partial structure of a battery device according to some embodiments of the present application;

[0081] FIG. 16 is an isometric view of a partial structure of a battery device according to some embodiments of the present application;

[0082] FIG. 17 is a cross-sectional view of a partial structure of a battery device according to other embodiments of the present application;

[0083] FIG. 18 is a structural schematic view of a partial structure of a battery device according to other further embodiments of the present application.

[0084] In the detailed description, reference signs are as follows: 1000-vehicle; 200-controller; 300-motor; 100-battery device; 11-box body; 111-first box body; 112-second box body; 12-battery cell; 121-outer shell; 1211-end cover; 1212-casing; 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-adaptor; 13-circuit board; 131-main body part; 132-sampling part; 133-temperature measurement assembly; 134-sampling line; 1341-solder pad; 135-signal lead plug; 14-busbar component; 141-first busbar component; 142-second busbar component; 143-first busbar sheet layer; 144-second busbar sheet layer; 145-first connecting segment; 146-second connecting segment; 147-positioning hole; 1471-first positioning hole; 1472-second positioning hole; 15-solder print; 151-first solder print; 152-second solder print; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0085] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0086] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0087] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0088] The term "and / or" in the present application is only used to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0089] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0090] "Multiple" appearing in the present application means two or more (including two).

[0091] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging to continue to use.

[0092] The battery cell includes but is not limited to lithium ion battery, sodium ion battery, sodium lithium ion battery, lithium metal battery, sodium metal battery, lithium sulfur battery, magnesium ion battery, nickel hydrogen battery, nickel cadmium battery, lead-acid battery, etc.

[0093] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can reduce the risk of short circuit of the positive and negative electrodes, and at the same time allow the active ions to pass through.

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

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

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

[0097] In some embodiments, the electrode assembly is provided with a tab, which can guide the current out of the electrode assembly. The tab includes a positive tab and a negative tab.

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

[0099] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or other shapes of battery cells, the prismatic battery cell includes a square battery cell, a blade battery cell, a multi-prismatic battery cell, for example, a hexagonal battery cell, etc.

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

[0101] The battery apparatus referred to in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0102] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0103] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies housed in the box.

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

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

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

[0107] In some embodiments, the battery apparatus can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0108] The internal part of the battery device is generally provided with a circuit board and a battery management system. The circuit board generally includes a main body part and a sampling part. The sampling part is connected with the circuit in the main body part, and is used for sampling the state (such as temperature, voltage, etc.) of each battery monomer. The battery management system adjusts the battery device according to the state information of the battery monomer obtained by the sampling part, so as to realize the management of the charging and discharging of the battery device, and the adjustment of the temperature, etc.

[0109] The development of battery technology needs to consider various design factors, such as charging and discharging rate, reliability, energy density, discharge capacity, cycle life, etc. In addition, the energy supplement efficiency of the battery device also needs to be considered.

[0110] The circuit board in the general battery device is arranged on one side of one wall of the shell of the battery monomer. The circuit board and the electrode terminal of the battery monomer can be arranged side by side on the wall. However, due to the limited arrangement space on the wall, the arrangement of the circuit board limits the size of the electrode terminal and / or the busbar, which may limit the overcurrent capacity between the electrode terminal, the busbar or both, resulting in the risk of reducing the energy supplement efficiency of the battery device.

[0111] Therefore, the present application provides a battery device. The battery device includes a plurality of battery monomers, a busbar and a circuit board. The battery monomer includes a shell and an electrode terminal. The electrode terminal is arranged on the shell. The busbar is connected to the electrode terminal. The busbar is used to realize the electrical connection of the plurality of battery monomers. The circuit board is arranged on a first outer end surface of the shell. The circuit board includes 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 busbar or the battery monomer. At least part of the main body part and at least part of the busbar are arranged in a first direction. The first direction intersects the first outer end surface. At least part of the main body part and at least part of the electrode terminal are arranged in the first direction. The first direction intersects the first outer end surface. Since the area of the first outer end surface is limited, when the main body part and the busbar and / or the electrode terminal are arranged in the first direction, it is beneficial to arrange a larger size busbar on the first outer end surface, and to improve the overcurrent capacity of the busbar. A larger size electrode terminal can also be arranged in a direction parallel to the first outer end surface, thereby facilitating the improvement of the overcurrent capacity of the electrode terminal. In some embodiments, it is also beneficial to increase the size of the busbar and the electrode terminal at the same time, so as to improve the overcurrent capacity between the electrode terminal and the busbar. In addition, the larger size electrode terminal and / or busbar also facilitates the improvement of the connection stability between the two.

[0112] The battery monomer described in the embodiments of the present application is suitable for a battery and a power consumption device using the battery monomer.

[0113] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc. The electric device is not specially limited in the embodiments of the present application.

[0114] The following embodiments take a vehicle 1000 as an example for convenience of description.

[0115] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power supply of the vehicle 1000.

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

[0117] In some embodiments of the present application, the battery can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0118] Referring to FIG. 2, FIG. 2 is an exploded view of a battery device 100 provided by some embodiments of the present application. The battery device 100 can include a battery monomer 12 and a box 11, and the battery monomer 12 is contained in the box 11.

[0119] The box 11 is a component for accommodating the battery monomer 12, and provides an accommodation space for the battery monomer 12. The box 11 can have various structures. In some embodiments, the box 11 can include a first box 111 and a second box 112, and the first box 111 and the second box 112 are overlapped with each other to define an accommodation space for accommodating the battery monomer 12. The first box 111 and the second box 112 can have various shapes, such as a cuboid shape, a cylindrical shape, etc. The first box 111 can be a hollow structure with one side open, and the second box 112 can also be a hollow structure with one side open. The open side of the second box 112 is overlapped with the open side of the first box 111, and the box 11 with the accommodation space is formed. Alternatively, the first box 111 can be a hollow structure with one side open, and the second box 112 can be a plate structure. The second box 112 is overlapped with the open side of the first box 111, and the box 11 with the accommodation space is formed. The first box 111 and the second box 112 can be sealed by a sealing element, which can be a sealing ring, sealing glue, etc.

[0120] In the battery device 100, the battery monomer 12 can be one or multiple. If the battery monomer 12 is multiple, the multiple battery monomers 12 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery monomers 12 are connected in series and in parallel. The multiple battery monomers 12 can be connected in series, in parallel, or in a mixed connection to form a battery module, and the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, which is accommodated in the box 11. Alternatively, the multiple battery monomers 12 can be directly connected in series, in parallel, or in a mixed connection, and the whole formed by the multiple battery monomers 12 is accommodated in the box 11.

[0121] Please refer to FIG. 3, which is an exploded view of the battery monomer 12 provided in some embodiments of the present application. The battery monomer 12 can include a shell 121 and an electrode assembly 122, and the electrode assembly 122 is accommodated in the shell 121.

[0122] In some embodiments, the shell 121 can include a housing 1212 and an end cover 1211, and the housing 1212 has an opening, and the end cover 1211 closes the opening of the housing 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 opposite ends. The shell 1212 can have various shapes, such as a cylindrical shape, a cuboid shape, 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 or entirely located inside the shell 1212. Optionally, the electrode assembly 122 accommodated in the shell 121 can be one or multiple. For example, in FIG. 3, the shell 121 of the battery cell 12 is provided with two electrode assemblies 122, which are stacked along the thickness direction of the shell 121. Of course, in other embodiments, the electrode assembly 122 accommodated in the shell 121 can be one, three, four, five, six, seven, or eight, etc. The shell 121 can also be used to accommodate an electrolyte, such as an electrolyte solution.

[0124] The end cover 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 cover 1211 cooperates with the shell 1212 to define a receiving space for accommodating the electrode assembly 122, the electrolyte solution, and other components. The end cover 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 cover 1211 can be adapted to the shape of the shell 1212, such as a rectangular plate structure adapted to the cuboid structure of the shell 1212, or a circular plate structure adapted to the cylindrical structure of the shell 1212. The end cover 1211 can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc. The end cover 1211 and the shell 1212 can be made of the same material or different materials.

[0125] In embodiments where the shell 1212 has an opening at one end, one end cover 1211 can be provided. In embodiments where the shell 1212 has openings at opposite ends, two end covers 1211 can be provided, which close the two openings of the shell 1212, respectively. The two end covers 1211 cooperates with the shell 1212 to define a receiving space. When assembling the battery cell 12, the electrode assembly 122 can be placed into the shell 1212, and the electrolyte can be filled into the shell 1212, and then the end cover 1211 is closed on the opening of the shell 1212 to close the opening of the shell 1212.

[0126] In some embodiments, the battery cell 12 can further include an electrode terminal 123 disposed on the shell 121, the electrode terminal 123 being configured to electrically connect with the tab of the electrode assembly 122 to input or output the electric energy of the battery cell 12. The electrode terminal 123 can be disposed on the housing 1212 of the shell 121 or on the end cover 1211 of the shell 121. The electrode terminal 123 can be directly connected with the tab, for example, the electrode terminal 123 is welded with the tab. The electrode terminal 123 can also be indirectly connected with the tab, for example, the electrode terminal 123 is indirectly connected with the tab through a current collecting member. The current collecting member can be a metal conductor, for example, copper, iron, aluminum, steel, aluminum alloy, etc. In some embodiments, the current collecting member can also be referred to as a adapter 124. For example, the material of the electrode terminal 123 can be various, for example, the material of the electrode terminal 123 can be copper, iron, aluminum, steel, aluminum alloy, etc. Of course, in some embodiments, the electrode terminal 123 can also be a composite material, that is, the electrode terminal 123 is connected by hot pressing or cold pressing of two different materials.

[0127] In some embodiments, the battery device 100 can further include other structures, for example, the battery device 100 can further include a current collecting member 14 configured to connect a plurality of battery cells 12, for example, the current collecting member 14 can be electrically connected with the positive electrode terminal of one of the adjacent two battery cells 12 and the negative electrode terminal of the other battery cell 12 by welding, clamping, abutting, etc. to achieve the electrical connection between the plurality of battery cells 12. Wherein, the wall part of the shell 121 where the electrode terminal 123 is disposed is generally provided with a terminal hole, the terminal hole penetrates through both sides of the wall part along the thickness direction of the wall part, and the electrode terminal 123 is inserted into the terminal hole along the thickness direction of the wall part, so that part of the electrode terminal 123 is located in the terminal hole, so that the electrode terminal 123 can not only connect the electrode assembly 122 located inside the shell 121, but also connect the current collecting member 14 located outside the shell 121 to achieve the input or output of the electric energy of the battery cell 12.

[0128] According to some embodiments of the present application, referring to FIG. 4-5, the present application provides a battery device 100, the battery device 100 comprises a plurality of battery monomers 12, a current collecting component 14 and a circuit board 13, the battery monomer 12 comprises a shell 121 and an electrode terminal 123, the electrode terminal 123 is arranged on the shell 121. The current collecting component 14 is connected to the electrode terminal 123, and the current collecting component 14 is used to realize the electrical connection of the plurality of battery monomers 12. The circuit board 13 is arranged on the first outer end surface 1213 of the shell 121, and the circuit board 13 comprises a main body part 131 and a sampling part 132, one end of the sampling part 132 is connected to the main body part 131, and the other end is connected to the current collecting component 14 or the battery monomer 12. At least part of the main body part 131 and at least part of the current collecting component 14 are arranged in a first direction X, the first direction X intersects the first outer end surface 1213, and / or at least part of the main body part 131 and at least part of the electrode terminal 123 are arranged in the first direction X, the first direction X intersects the first outer end surface 1213.

[0129] It should be noted that the stacked arrangement can be understood as contact or spaced apart in 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 arranged on the first outer end surface 1213 of the shell 121, which means that the circuit board 13 is arranged on the side of the first outer end surface 1213 of the shell 121 away from the inside of the battery monomer 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 shell 121.

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

[0133] In some embodiments, the electrode assembly 122 can comprise a flat area, the flat area being a flat part of the electrode assembly 122, the part of the positive electrode tab in the flat area being substantially flat, and the part of the negative electrode tab in the flat area being substantially flat. As an example, the part of the positive electrode tab in the flat area and the part of the negative electrode tab in the flat area are both flat plate structures. If the electrode assembly 122 is a stacked structure, the electrode assembly 122 is a stacked electrode assembly 122, and the entire electrode assembly 122 is a flat area. If the electrode assembly 122 is a winding structure, the electrode assembly 122 is a winding electrode assembly 122, and the electrode assembly 122 can further comprise a corner area, the corner area being located at at least one end of the flat area in a direction, and at least part of the surface of the electrode tab of the electrode assembly 122 located in the corner area being arc-shaped.

[0134] In some embodiments, the battery cell 12 is a square battery cell, the housing 121 includes a first wall and a second wall opposite to each other along a first direction X, a third wall and a fourth wall opposite to each other along a second direction Y, a fifth wall and a sixth wall opposite to each other along a third direction Z, the first wall, the second wall, the third wall, the fourth wall, the fifth wall and the sixth wall collectively define a receiving cavity for receiving the electrode assembly 122. The fifth wall and the sixth wall are the largest wall portions among the six walls. The third direction Z is the thickness direction of the battery cell 12, i.e., the stacking direction of the flat regions of the electrode assembly 122. The surface of the first wall facing away from the receiving cavity is the first outer end surface 1213. In this embodiment, the positive electrode terminal and the negative electrode terminal are both arranged on the first wall. Of course, in this embodiment, the positive electrode terminal and the negative electrode terminal can also be arranged on the first wall and the second wall, respectively. In some other embodiments 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, and the battery cell 12 has a blade shape.

[0135] In some embodiments, the battery cell 12 is a square battery cell, the housing 121 includes a first wall and a second wall opposite to each other along a first direction X, a third wall and a fourth wall opposite to each other along a second direction Y, a fifth wall and a sixth wall opposite to each other along a third direction Z, the first wall, the second wall, the third wall, the fourth wall, the fifth wall and the sixth wall collectively define a receiving cavity for receiving the electrode assembly 122. The fifth wall and the sixth wall are the largest wall portions among the six walls. The third direction Z is the thickness direction of the battery cell 12, i.e., the stacking direction of the flat regions of the electrode assembly 122. The surface of the first wall facing away from the receiving cavity is the first outer end surface 1213. In this embodiment, the positive electrode terminal and the negative electrode terminal are both arranged on the fifth wall. Of course, in this embodiment, the positive electrode terminal and the negative electrode terminal can also be arranged on the fifth wall and the sixth wall, respectively. In some other embodiments 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, and the battery cell 12 has a blade shape.

[0136] In some embodiments, the battery cell 12 includes only one electrode terminal 123, which can be arranged on any wall portion of the housing 121. In this embodiment, the electrode terminal 123 serves as one of the output poles of the battery cell 12, and the housing 121 serves as the other output pole of the battery cell 12. The battery cell 12 can be a square battery cell or a 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 component 14 is electrically connected with the electrode terminal 123 of the plurality of battery monomers 12 to realize the electrical connection of the plurality of battery monomers 12. The electrical connection between the busbar component 14 and the electrode terminal 123 can be achieved by welding, riveting, abutting, or the like.

[0140] In some embodiments, the sampling part 132 includes a temperature measurement assembly 133, which includes a thermistor. One end of the thermistor is electrically connected with the main body part 131 through a sampling line 134, and the other end of the thermistor is in contact with the electrode terminal 123 and / or the busbar component 14, thereby collectively realizing temperature collection. The sampling line 134 can be a flexible circuit board with a small size, or a wire.

[0141] In some embodiments, the sampling part 132 includes an adapter wire, such as a nickel sheet. The nickel sheet is in contact with the busbar component 14 and / or the electrode terminal 123, and is electrically connected with the main body part 131, thereby collectively realizing voltage collection.

[0142] At least part of the main body part 131 and at least part of the busbar component 14 are arranged in a first direction X, which intersects the first outer end surface 1213. This means that, in the direction parallel to the first outer end surface 1213, part of the main body part 131 and part of the busbar component 14 do not share space, i.e., more space is given for arranging a larger size busbar component 14 under the premise of arranging the circuit board 13.

[0143] At least part of the main body part 131 and at least part of the electrode terminal 123 are arranged in a first direction X, which intersects the first outer end surface 1213. This means that, in the direction parallel to the first outer end surface 1213, part of the main body part 131 and part of the electrode terminal 123 do not share space, i.e., more space is given for arranging a larger size electrode terminal 123 under the premise of arranging the circuit board 13.

[0144] In the technical solution, since the area of the first outer end surface 1213 is limited, when the main body part 131 and the bus member 14 and / or the electrode terminal 123 are stacked in the first direction X, the part of the main body part 131 that does not overlap the bus member 14 and the electrode terminal in the first direction occupies a smaller arrangement area on the first outer end surface 1213, so that more area of the first outer end surface 1213 can be used to arrange the bus member 14 and / or the electrode terminal 123 with a larger size; when more area of the first outer end surface 1213 can be used to arrange the bus member 14 with a larger size, the overcurrent capacity of the bus member 14 itself can be improved; when more area of the first outer end surface 1213 can be used to arrange the electrode terminal 123 with a larger size, the overcurrent capacity of the electrode terminal 123 itself can be improved; when more area of the first outer end surface 1213 can be used to arrange the bus member 14 and the electrode terminal 123 with larger sizes, not only the overcurrent capacities of the two can be improved, but also the overcurrent between the two can be improved. In addition, the connection stability between the two can also be improved.

[0145] According to some embodiments of the present application, referring to FIGS. 3-5, 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 a second direction Y, the second direction Y intersects the first direction X, and the maximum distance D1 of the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y is less than the maximum size d1 of the main body part 131 along the second direction Y.

[0146] The maximum distance D1 of the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y refers to the maximum measurement value obtained after measuring multiple times between the first electrode terminal 1231 and the second electrode terminal 1232, and 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, the distance between the right side of the first electrode terminal 1231 and the left side of the second electrode terminal 1232 in FIG. 4. When the first electrode terminal 1231 and the second electrode terminal 1232 have a special profile, during measurement, the line between the centers of the circumscribed circles of the orthographic projection of the first electrode terminal 1231 and the circumscribed circle of the second electrode terminal 1232 in the same projection plane perpendicular to the first outer end surface 1213 is measured.

[0147] The maximum size d1 of the main body part 131 along the second direction Y refers to the maximum measurement value obtained after measuring multiple times along the second direction Y of the main body part 131.

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

[0149] In the embodiment where the body part 131 is arranged to at least partially overlap the electrode terminals 123 in the first direction X, or in the embodiment where the body part 131 is arranged to at least partially overlap the busbar member 14 and the electrode terminals 123 in the first direction, the maximum distance D1 of the first electrode terminal 1231 and the second electrode terminal 1232 in the second direction Y can be arranged to be smaller than the maximum size d1 of the body part 131 in the second direction Y, so that a larger distance between the first electrode terminal 1231 and the second electrode terminal 1232 is not necessarily reserved for the body part 131, and the first outer end surface 1213 can be more fully utilized to arrange a larger size of the electrode terminals 123, for example, the first electrode terminal 1231 and the second electrode terminal 1232 can be arranged to have a larger size, and the overcurrent capacity of each of them can be improved.

[0150] In the following, the maximum distance and the maximum size are the maximum measured values obtained after multiple measurements.

[0151] According to some embodiments of the present application, referring to FIGS. 4-5, the maximum distance D2 between the outer contours of the first electrode terminal 1231 and the second electrode terminal 1232 at the two most distant points in the second direction Y is greater than or equal to the maximum size d2 of the circuit board 13 in the second direction Y.

[0152] Since the maximum distance D2 between the outer contours of the first electrode terminal 1231 and the second electrode terminal 1232 at the two most distant points in the second direction Y is greater than or equal to the maximum size d2 of the circuit board 13 in the second direction Y, on the one hand, compared to arranging the body part 131 between the first electrode terminal 1231 and the second electrode terminal 1232, the space around the body part 131 is larger, and the arrangement of the sampling part 132 can be more flexible, for example, as shown in FIGS. 4 and 5, in some embodiments, the body part 131 is arranged in the middle of the first outer end surface 1213, and after the sampling part 132 extends from the edge of the body part 131 in the second direction Y, the first electrode terminal 1231 and the second electrode terminal 1232 are at least partially exposed, and the exposed part can be directly connected to the sampling part 132, reducing the difficulty of electrical connection between the circuit board 13 and the electrode terminals 123. In other words, the first electrode terminal 1231 at least partially exceeds the body part 131 in the second direction Y, and / or the second electrode terminal 1232 at least partially exceeds the body part 131 in the second direction Y.

[0153] According to some embodiments of the present application, referring to FIGS. 3-5, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at the first outer end surface 1213, and 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.

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

[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 arranged on the outer end surface of the first electrode terminal 1231 and the second electrode terminal 1232 along the first direction X at the same time, and a larger distance does not need to be reserved due to the need to arrange a certain size of the main body 131 between the first electrode terminal 1231 and the second electrode terminal 1232, so that the distance between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y can be reserved smaller, and more space on the first outer end surface 1213 along the second direction Y can be used to increase the size of the first electrode terminal 1231 and the second electrode terminal 1232; in the case of reducing the distance between the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y, the size of the main body 131 itself along the second direction Y can also not be reduced, so that the number of lines arranged on the main body 131 and the required insulation gap between the lines can be not affected, and the overcurrent capacity of the first electrode terminal 1231 and the second electrode terminal 1232 can be improved on the premise of not affecting reliability.

[0156] In the above scheme, since 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, the heat generated by the circuit board 13 is uniformly distributed, which is beneficial to maintaining good overcurrent capacity between the electrode terminal 123 and the bus component 14 and between the electrode terminal 123 and the electrode assembly 122.

[0157] According to some embodiments of the present application, referring to FIGS. 3-5, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at the first outer end surface 1213, and 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.

[0158] At least one sampling portion 132 protrudes from the edge of the main body portion 131 on the side of the second direction Y and is completely laminated with the busbar component 14 along the first direction X. In this way, the sampling portion 132 can not separately occupy the size space of the first outer end face 1213 along the second direction Y, so that the arrangement of the sampling portion 132 does not limit the size of the first electrode terminal 1231 and the second electrode terminal 1232, and the size of the busbar component 14, which is conducive to the arrangement of the electrode terminal 123 with larger size.

[0159] In some embodiments, the plurality of sampling portions 132 includes a plurality of groups of sampling portions 132, each group of sampling portions 132 including a plurality of sampling portions 132 arranged at intervals, wherein one group of sampling portions 132 is located between the busbar component 14 and the first outer end face 1213, and one group of sampling portions 132 is located on the side of the busbar component 14 away from the first outer end face 1213. Such an arrangement can not only give the sampling portion 132 more assembly space, but also reduce the overall size of the circuit board 13, the battery cell 12, and the busbar component 14 in the first direction X to some extent, which is conducive to improving the energy density of the battery device 100.

[0160] In the above scheme, the sampling portion 132 can be laminated with the busbar component 14 along the first direction X, so that the sampling portion 132 does not separately occupy the size space of the first outer end face 1213 along the second direction Y. The size space of the first outer end face 1213 along the second direction Y can be used to increase the size of the busbar component 14 along the second direction Y to improve the current carrying capacity between the busbar component 14 and the electrode terminal 123.

[0161] According to some embodiments of the present application, please refer to FIGS. 3-5, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located on the first outer end face 1213. 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 arranged at intervals along the second direction Y, and the maximum distance D3 of the first busbar component 141 and the second busbar component 142 along the second direction Y is less than the maximum size d1 of the main body portion 131 along the second direction Y.

[0162] In some embodiments, the first electrode terminal 1231 is a positive electrode terminal, the second electrode terminal 1232 is a negative electrode terminal, the plurality of battery cells 12 includes a first battery cell 12, a second battery cell 12 and a third battery cell 12 arranged in sequence, the first busbar component 141 is electrically connected to a positive electrode terminal of the first battery cell 12 and a negative electrode terminal of the second battery cell 12, and the second busbar component 142 is electrically connected to a positive electrode terminal of the second battery cell 12 and a negative electrode 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 of the first busbar component 141 and the second busbar component 142 along the second direction Y is less than the maximum dimension d1 of the main body portion 131 along the second direction Y, and since the main body portion 131 can be arranged at least partially laminated with at least one of the first busbar component 141 or the second busbar component 142 along the second direction Y, the distance of the first busbar component 141 and the second busbar component 142 along the second direction Y can be reduced to increase the dimension of at least one of the first busbar component 141 and the second busbar component 142 along the second direction Y, so that the overcurrent capacity of at least one of the first busbar component 141 or the second busbar component 142 can be enhanced.

[0164] According to some embodiments of the present application, referring to FIGS. 4-6, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at 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, and the first busbar component 141 and the second busbar component 142 are both arranged at least partially laminated with the main body portion 131 along the first direction X.

[0165] The first busbar component 141 and the second busbar component 142 can jointly position the main body portion 131.

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

[0167] According to some embodiments of the present application, referring to FIGS. 7-9, the busbar component 14 is at least partially folded along the second direction Y to form a multi-layer laminated structure.

[0168] The busbar part 14 in the laminated structure means that the busbar part 14 has a relatively large flow area relative to a single-layer busbar part 14, which is conducive to improving the flow capacity between the busbar part 14 and the electrode terminal 123.

[0169] In the above scheme, since the busbar part 14 is at least partially folded in the second direction Y to form a multi-layer laminated structure, it is conducive to improving the flow capacity of the busbar part 14 while occupying a smaller space in the second direction Y.

[0170] According to some embodiments of the present application, referring to FIGS. 10 and 11, the circuit board 13 includes a plurality of main body parts 131 laminated in the first direction X. At least one of the plurality of main body parts 131 is laminated with at least part of the busbar part 14 in the first direction X, and / or at least one of the plurality of main body parts 131 is laminated with at least part of the electrode terminal 123 in the first direction X.

[0171] In some embodiments, part of the main body parts 131 is located on the side of the busbar part 14 facing the first outer end surface 1213, and part of the main body parts 131 is located on the side of the busbar part 14 facing away from the first outer end surface 1213. Such an arrangement can save the overall size of the circuit board 13, the battery monomer 12 and the busbar part 14 in the first direction X while arranging a larger size busbar part 14, which is conducive to improving the energy density of the battery device 100. Of course, in some embodiments, all main body parts 131 can be located on the side of the busbar part 14 facing the first outer end surface 1213.

[0172] Since the circuit board 13 includes a plurality of main body parts 131 laminated in the first direction X, the sampling part 132 can be arranged more flexibly, and the assembly of the circuit board 13 is more convenient. In this embodiment, since at least one of the plurality of main body parts 131 is laminated with at least part of the busbar part 14 in the first direction X, and / or at least one of the plurality of main body parts 131 is laminated with at least part of the electrode terminal 123 in the first direction X. Part of the main body parts 131 will not occupy the space in the direction parallel to the first outer end surface 1213, that is, will not limit the size of the busbar part 14 and the electrode terminal 123 in the second direction Y.

[0173] In the above scheme, in the case that the space of the first outer end surface 1213 along the second direction Y is limited, in order to make the circuit board 13 have a higher circuit density while arranging more sampling portions 132, the circuit board 13 can be arranged in a form including a plurality of main body portions 131 stacked along the first direction X. At this time, at least one of the plurality of main body portions 131 is arranged in a stacked manner along the first direction X with at least part of the busbar member 14, and / or at least one of the plurality of main body portions 131 is arranged in a stacked manner along the first direction X with at least part of the electrode terminal 123, which is advantageous for making part of the main body portions 131 and the busbar member 14 and / or the electrode terminal 123 not share the space in the direction parallel to the first outer end surface 1213, so as to arrange the busbar member 14 and / or the electrode terminal 123 with a larger size, and make the battery device 100 have a higher overcurrent capacity.

[0174] According to some embodiments of the present application, please refer to FIG. 12, at least part of the circuit board 13 is located between the busbar member 14 and the first outer end surface 1213.

[0175] At least part of the circuit board 13 is located between the busbar member 14 and the first outer end surface 1213, which means that part of the circuit board 13 is arranged in the gap formed between the busbar member 14 and the first outer end surface 1213 along the first direction X, so that the space at the gap is utilized, and the circuit board 13 does not occupy the space on the side of the busbar member 14 away from the first outer end surface 1213 while the busbar member 14 has a larger size, which is also advantageous for improving the energy density of the battery device 100. For example, please refer to FIG. 12, the circuit board 13 shares part of the space with the electrode terminal 123, so as to improve the energy density of the battery device 100.

[0176] In the above scheme, due to the fact that at least part of the circuit board 13 is located between the busbar member 14 and the first outer end surface 1213, part of the circuit board 13 can be arranged in the gap formed between the busbar member 14 and the first outer end surface 1213 along the first direction X, so that the space at the gap is utilized, which is also advantageous for improving the energy density of the battery device 100 while arranging the busbar member 14 with a larger size to improve the overcurrent capacity of the battery device 100.

[0177] According to some embodiments of the present application, please refer to FIG. 12, the main body portion 131 and / or the sampling portion 132 of the circuit board 13 is located between the busbar member 14 and the first outer end surface 1213.

[0178] The main body part 131 and / or the sampling part 132 of the circuit board 13 is located between the busbar component 14 and the first outer end surface 1213, which means that the main body part 131 and / or the sampling part 132 is arranged in the gap formed between the busbar component 14 and the first outer end surface 1213 in the first direction X, so that the space at the gap is utilized, and the main body part 131 and / or the sampling part 132 does not occupy the space on the side of the busbar 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, referring to FIG. 12, the main body part 131 and / or the sampling part 132 of the circuit board 13 is located on one side of the electrode terminal 123 in the second direction Y, and at least one of the main body part 131 and the sampling part 132 shares part of the space with the electrode terminal 123, which is conducive to improving the energy density of the battery device 100.

[0179] In the above scheme, by arranging the main body part 131 and / or the sampling part 132 between the busbar component 14 and the first outer end surface 1213, the gap formed between the busbar component 14 and the first outer end surface 1213 is utilized, so that the battery device 100 has a higher energy density.

[0180] According to some embodiments of the present application, referring to FIG. 11, the circuit board 13 further comprises a temperature measurement assembly 133, the temperature measurement assembly 133 is connected to at least one sampling line 134 of the circuit board 13, and the temperature measurement assembly 133 is at least partially arranged on the surface of the circuit board 13 facing the first outer end surface 1213.

[0181] The temperature measurement assembly 133 is at least partially arranged on the surface of the circuit board 13 facing the first outer end surface 1213, which means that the temperature measurement assembly 133 is at least partially arranged in the gap formed between the circuit board 13 and the first outer end surface 1213 in the first direction X, so that the space at the gap is utilized, and the temperature measurement assembly 133 does not occupy the space on the side of the busbar 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, referring to FIG. 11, the temperature measurement assembly 133 is at least partially arranged on the surface of the circuit board 13 facing the first outer end surface 1213, and the temperature measurement assembly 133 can share part of the space with the electrode terminal 123 in the first direction X.

[0182] In the above scheme, since the temperature measurement assembly 133 usually has a certain thickness, by arranging at least part of the temperature measurement assembly 133 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 utilized to accommodate the temperature measurement assembly 133, which is conducive to improving the space utilization to increase the energy density of the battery device 100.

[0183] According to some embodiments of the present application, referring to FIG. 13, the circuit board 13 comprises a signal leading plug 135 connected to the sampling line 134 on the circuit board 13 at the surface of the circuit board 13 facing the first outer end surface 1213.

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

[0185] The sampling line 134 can be a line integrated in the main body 131 or a wire electrically connected to the main body 131.

[0186] In the above scheme, since the signal leading plug 135 usually has a certain thickness, by arranging at least part of the signal leading plug 135 at 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 leading plug 135, which is conducive to improving the energy density of the battery device 100.

[0187] According to some embodiments of the present application, referring to FIG. 11, the sampling unit 132 comprises a solder pad 1341 connected to the busbar component 14.

[0188] The solder pad 1341 connected to the busbar component 14 means that the sampling unit 132 is directly electrically connected to the busbar component 14, and the adapter wire such as the nickel sheet is omitted. Further, the space occupied by the circuit board 13 is reduced.

[0189] In the above scheme, compared with the mode that the sampling unit 132 is connected to the busbar component 14 through the adapter 124 stacked with the main body 131 along the first direction X, the sampling unit 132 is directly connected to the busbar component 14 through 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 the present application, referring to FIGS. 7-9 and 14, the multi-layer stacked structure comprises a first busbar sheet layer 143 connected to the electrode terminal 123 and forming a connection area, and a second busbar sheet layer 144 comprising a relief through hole at least partially arranged corresponding to the connection area along the first direction X, and the second busbar sheet layer 144 is located on the side of the first busbar sheet layer 143 away from the first outer end surface 1213.

[0191] The connection area formed by the first busbar sheet layer 143 and the electrode terminal 123 can be a welding area.

[0192] The profile of the relief through hole can be circular, semicircular, polygonal, etc., and of course can be irregular as shown in FIGS. 8 and 9.

[0193] The arrangement of the avoiding 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 away from the first outer end surface 1213, for example, when the two are connected by welding, the welding gun can be arranged on the side of the busbar component 14 away from the first outer end surface 1213 to weld the two, the welding gun is arranged more flexibly, which is conducive to automatic production. At the same time, while the busbar component 14 has a large flow area, the two can be connected by connecting only the first busbar layer 143 and the electrode terminal 123, without the need to connect the first busbar layer 143, the second busbar layer 144 and the electrode terminal 123 at the same time, which is relatively low in connection difficulty, for example, when the busbar component 14 and the electrode terminal 123 are connected by welding, the required welding thickness is small, the post-welding deformation is small, and the risk of welding defects is also relatively low.

[0194] In the above scheme, the arrangement of the first busbar layer 143 and the second busbar layer 144 can make the busbar component 14 have a large flow cross-sectional area, and in the multi-layer stacked structure, the electrical connection of the busbar component 14 and the electrode terminal 123 can be achieved by connecting only the first busbar layer 143 and the electrode terminal 123. At the same time, due to the fact that the second busbar layer 144 includes an avoiding through hole arranged corresponding to the connection area, the connection of the first busbar layer 143 and the electrode terminal 123 can be performed at the position of the avoiding through hole, which can reduce the welding difficulty of the multi-layer stacked structure and the electrode terminal 123 and make the busbar component 14 have a higher flow capacity.

[0195] According to some embodiments of the present application, please refer to FIGS. 7-9 and 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 avoiding through hole, the avoiding through hole is at least partially arranged corresponding to the connection area along the first direction X, and the sampling part 132 is connected to the region of the first busbar layer 143 corresponding to the avoiding through hole along the first direction X.

[0196] Since the sampling part 132 is connected to the region of the first busbar layer 143 corresponding to the avoiding through hole along the first direction X, the sampling part 132 and the second busbar layer 144 can share part of the space, and the overall size of the sampling part 132, the busbar component 14 and the battery monomer 12 in the first direction X is relatively small, which is conducive to making the battery device 100 have a higher energy density.

[0197] In the above scheme, in the first direction X, the sampling part 132 can share part of the space with the second busbar layer 144, which is conducive to improving the energy density of the battery device 100.

[0198] According to some embodiments of the present application, referring to FIG. 15, the battery cell 12 has a dimension along the second direction Y smaller than a dimension along the first direction X and larger than a dimension along the third direction Z, the first direction X, the second direction Y and the third direction Z being perpendicular to each other, the electrode terminal 123 includes a first electrode terminal 1231 located at the first outer end surface 1213, and the busbar member 14 includes a first busbar member 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 member 141. The maximum distance of the first electrode terminal 1231 from 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 of the first busbar member 141 from 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 located at a surface of the housing 121 opposite to the first outer end surface 1213 along the first direction X, the second electrode terminal 1232 being opposite in polarity to the first electrode terminal 1231.

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

[0201] In some embodiments, the battery cell 12 has a blade shape.

[0202] The maximum distance of the first electrode terminal 1231 from 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 of the first busbar member 141 from 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 size of the first electrode terminal 1231 and / or the first busbar member 141.

[0203] In the above scheme, since the maximum distance of the first electrode terminal 1231 from the edge of the first outer end surface 1213 along the second direction Y is less than the maximum dimension of the main body portion 131 along the second direction Y, and / or the maximum distance of the first busbar member 141 from the edge of the first outer end surface 1213 along the second direction Y is less than the maximum dimension of the main body portion 131 along the second direction Y, the first electrode terminal 1231 with a relatively large size can be arranged on the first outer end surface 1213 without affecting the arrangement of the circuit board 13, and the circuit board 13 can at least partially overlap with at least one of the first busbar member 141 or the first electrode terminal 1231 along the first direction X, so that the battery device 100 has a stronger overcurrent capacity and a higher energy compensation efficiency.

[0204] According to some embodiments of the present application, referring to FIG. 16, the battery cell 12 includes a second outer end surface 1214 intersecting the first outer end surface 1213, and a plurality of battery cells 12 are arranged in a third direction Z perpendicular to the second outer end surface 1214. The electrode terminal 123 is located on the second outer end surface 1214, the busbar member 14 includes a first connecting segment 145 connected to the electrode terminal 123 and a second connecting segment 146 connected to the circuit board 13, and the first connecting segment 145 and the second connecting segment 146 are angularly connected. At least part of the main body portion 131 and at least part of the second connecting segment 146 are arranged in a stack along the first direction X.

[0205] At least part of the main body portion 131 and at least part of the second connecting segment 146 are arranged in a stack along the first direction X. This means that the main body portion 131 does not occupy the space required by the second connecting segment 146, i.e., the second connecting segment 146 can be arranged with a larger size.

[0206] In some embodiments, the busbar member 14 includes two first connecting segments 145 and one second connecting segment 146, the second connecting segment 146 protrudes from the first connecting segment 145 along the first direction X, and the busbar member 14 further includes a connecting portion connecting the first connecting segment 145 and the second connecting segment 146. The busbar member 14 can be in the shape of a U. Such an arrangement is advantageous in reducing the risk of short circuit between the second connecting segment 146 and the shell 121.

[0207] In some embodiments, the battery cell 12 further comprises a second electrode terminal 1232, the first electrode terminal 1231 and the second electrode terminal 1232 are opposite in polarity. Two battery cells 12 adjacent to each other include a first battery cell 12 and a second battery cell 12, the surface of the housing 121 of the first battery cell 12 facing the housing 121 of the second battery cell 12 in the third direction Z is provided with a recess, and the second electrode terminal 1232 of the second battery cell 12 is at least partially located in the recess. With such an arrangement, the second electrode terminal 1232 of the second battery cell 12 is facilitated to share part of the space with the housing 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, the plurality of battery cells 12 are stacked in the third direction Z, and adjacent battery cells 12 can be electrically connected by the first connecting segment 145 and the second connecting segment 146. Since the first outer end surface 1213 of at least one of the plurality of battery cells 12 faces another battery cell 12, the circuit board 13 is not convenient to connect the first connecting segment 145 located on the first outer end surface 1213, therefore, the circuit board 13 can be electrically connected to the second connecting segment 146 for sampling at the first outer end surface 1213 of the plurality of battery cells 12; the main body part 131 and at least part of the second connecting segment 146 are stacked in the first direction X, which is conducive to using more space along the second direction Y on the first outer end surface 1213 to increase the size of the second connecting segment 146 along the second direction Y, so as to improve the overcurrent capacity of the first bus member 141.

[0209] According to some embodiments of the present application, please refer to FIG. 16, the main body part 131 is located on the side of the second connecting segment 146 away from the first outer end surface 1213.

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

[0211] In the above scheme, by arranging the main body part 131 on the side of the second connecting segment 146 away from the first outer end surface 1213, when the plurality of battery cells 12 are arranged in the third direction Z, the circuit board 13 can be more convenient to connect the second connecting segment 146 of the plurality of battery cells 12 for sampling.

[0212] According to some embodiments of the present application, referring to FIG. 16, the plurality of battery monomers 12 are arranged in a third direction Z, the third direction Z being perpendicular to the second outer end surface 1214. A maximum distance of the second connecting section 146 from the edge of the first outer end surface 1213 in the second direction Y is less than a maximum dimension of the main body 131 in the second direction Y, the second direction Y, the first direction X and the third direction Z being perpendicular to each other.

[0213] The maximum distance of the second connecting section 146 from the edge of the first outer end surface 1213 in the second direction Y being less than the maximum dimension of the main body 131 in the second direction Y means that the arrangement of the main body 131 does not limit the size of the second connecting section 146.

[0214] In the above-mentioned solution, by setting the maximum distance of the second connecting section 146 from the edge of the first outer end surface 1213 in the second direction Y to be less than the maximum dimension of the main body 131 in the second direction Y, the part of the circuit board 13 and the second connecting section 146 can be arranged in the first direction X, and then more space on the first outer end surface 1213 in the second direction Y can be used to increase the size of the second connecting section 146 in the second direction Y, which can improve the cross-sectional area of the current-carrying component 14 and the current-carrying capacity between the current-carrying component 14 and the electrode terminal 123.

[0215] According to some embodiments of the present application, referring to FIG. 17, the current-carrying component 14 and the electrode terminal 123 are connected to form a welding mark 15, and in the same projection plane perpendicular to the first direction X, the orthographic projection of the main body 131 is dislocated from the orthographic projection of the welding mark 15.

[0216] In some embodiments, the circuit board 13 and the current-carrying component 14 are integrally provided, for example, the battery device 100 includes an insulating film, and the circuit board 13 and the current-carrying component 14 are at least partially embedded in the insulating film. In other words, the battery device 100 includes a first insulating film and a second insulating film, and the circuit board 13 and the current-carrying component 14 are located between the first insulating film and the second insulating film. The first insulating film is connected to the second insulating film. Such a design can eliminate the need for a conventional wire harness isolation plate, thereby improving the energy density of the battery device 100 and improving the assembly efficiency.

[0217] In the same projection plane perpendicular to the first direction X, the orthographic projection of the main body 131 is dislocated from the orthographic projection of the welding mark 15, which means that even after the main body 131 and the current-carrying component 14 are integrally provided and assembled synchronously, the connection between the current-carrying component 14 and the electrode terminal 123 will not be interfered.

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

[0219] According to some embodiments of the present application, referring to FIG. 17, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at the first outer end surface 1213, the first electrode terminal 1231 and the second electrode terminal 1232 are arranged at intervals along a second direction Y, the second direction Y intersects 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 with the first electrode terminal 1231 to form a first welding mark 151, and the second busbar component 142 is connected with the second electrode terminal 1232 to form a second welding mark 152; along the second direction Y, the main body 131 is located between the first welding mark 151 and the second welding mark 152.

[0220] Along the second direction Y, the main body 131 is located between the first welding mark 151 and the second welding mark 152, which means that even if the main body 131 is integrally supplied with the busbar component 14 and assembled synchronously, the connection of the first busbar component 141 with the first electrode terminal 1231 will not be interfered, and the connection of the second busbar component 142 with the second electrode terminal 1232 will not be interfered.

[0221] In the above scheme, along the second direction Y, the main body 131 is located between the first welding mark 151 and the second welding mark 152, which means that even if the main body 131 is integrally supplied with the busbar component 14 and assembled synchronously, the connection of the first busbar component 141 with the first electrode terminal 1231 will not be interfered, and the connection of the second busbar component 142 with the second electrode terminal 1232 will not be interfered.

[0222] According to some embodiments of the present application, referring to FIG. 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 at the first outer end surface 1213, the busbar component 14 includes a first busbar component 141, and the first busbar component 141 is connected with the first electrode terminal 1231 to form a first welding mark 151. Along the second direction Y, the main body 131 is located between the first welding 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 welding mark 151 and the edge of the first outer end face 1213, meaning that even if the main body 131 is integrally provided with the busbar component 14 and assembled synchronously, the connection of the first busbar component 141 and the first electrode terminal 1231 will not be interfered.

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

[0225] According to some embodiments of the present application, please refer to FIG. 17 and FIG. 18, 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 is opposite to the positioning groove 1233. 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 hole 147 and the positioning groove 1233 can serve as a positioning reference when the busbar component 14 and the electrode terminal 123 are connected, for example, when the positioning hole 147 and the positioning groove 1233 are opposite, the connection of the two is performed, in some cases, it can be judged by photoelectric sensor and other equipment. It is beneficial to the automation 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 if the main body 131 is integrally provided with the busbar component 14 and assembled synchronously, the positioning judgment when the first busbar component 141 and the first electrode terminal 1231 are connected will not be invalid due to the blocking of the main body 131 to the positioning hole 147 and / or the positioning groove 1233.

[0228] In the above scheme, since 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, the busbar component 14 and the circuit board 13 can be assembled first, and the positioning hole 147 on the busbar component 14 used for positioning with the electrode terminal 123 is 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 monomer 12, at this time, the fast assembly can be performed according to the alignment of the positioning hole 147 and the positioning groove 1233 along the first direction X, which is beneficial to speed up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery monomer 12.

[0229] According to some embodiments of the present application, referring to FIG. 17, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at the first outer end surface 1213, the first electrode terminal 1231 and the second electrode terminal 1232 are arranged in a second direction Y, the second direction Y 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 part 131 is located between the first positioning groove 12331 and the second positioning groove 12332.

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

[0231] In the above scheme, since along the second direction Y, the main body part 131 is located between the first positioning groove 12331 and the second positioning groove 12332, the busbar component 14 and the circuit board 13 can be assembled first, and 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 assembled busbar component 14 and the circuit board 13 are positioned and fixed with the battery monomer 12 at the same time. At this time, the first positioning groove 12331 and the positioning hole 147 opposite to it can be aligned along the first direction X, and the second positioning groove 12332 and the positioning hole 147 opposite to it can be aligned along the first direction X for quick assembly, which is beneficial to speed up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery monomer 12.

[0232] According to some embodiments of the present application, referring to FIG. 17, the electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at the first outer end surface 1213, the first electrode terminal 1231 and the second electrode terminal 1232 are arranged in a second direction Y, the second direction Y intersects the first direction X. The busbar component 14 includes a first busbar component 141 connected with the first electrode terminal 1231 and a second busbar component 142 connected with the second electrode terminal 1232. The positioning hole 147 includes 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 part 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. That means, even if the main body 131 is integrated with the busbar component 14 and assembled synchronously, the positioning judgment when the first busbar component 141 is connected with the first electrode terminal 1231 and the positioning judgment when the second busbar component 142 is connected with the second electrode terminal 1232 will not be invalid due to the positioning hole 147 being blocked by the main body 131.

[0234] In the above scheme, since along the second direction Y, the main body 131 is located between the first positioning hole 1471 and the second positioning hole 1472, the busbar component 14 and the circuit board 13 can be assembled and combined 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 combined busbar component 14 and circuit board 13 are positioned and fixed with the battery monomer 12 at the same time. At this time, the first positioning hole 1471 and the positioning groove 1233 opposite to it can be aligned along the first direction X, and the second positioning hole 1472 and the positioning groove 1233 opposite to it can be aligned along the first direction X for quick assembly, which is beneficial to speed up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery monomer 12.

[0235] According to some embodiments of the present application, please refer to FIG. 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 monomer 12 includes the first electrode terminal 1231 located on the first outer end surface 1213, and the positioning groove 1233 includes the 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. That means, even if the main body 131 is integrated with the busbar component 14 and assembled synchronously, the positioning judgment when the first busbar component 141 is connected with the first electrode terminal 1231 will not be invalid 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 slot 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 and combined first, and the first positioning slot 12331 is 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 monomer 12. At this time, the first positioning slot 12331 and the positioning hole 147 opposite to it can be aligned along the first direction X for quick assembly, which is beneficial to speed up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery monomer 12.

[0238] According to some embodiments of the present application, referring to FIG. 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 monomer 12 includes a first electrode terminal 1231 located on the first outer end surface 1213 and a first busbar component 141 connected to the first electrode terminal 1231, and the positioning hole 147 includes a first positioning hole 1471 located on the first busbar component 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 if the main body 131 is integrally supplied and assembled with the busbar component 14, the positioning judgment when the first busbar component 141 is connected to the first electrode terminal 1231 will not be invalid 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 slot 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 and combined first, and the first positioning slot 12331 is 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 monomer 12. At this time, the first positioning slot 12331 and the positioning hole 147 opposite to it can be aligned along the first direction X for quick assembly, which is beneficial to speed up the assembly rhythm of the circuit board 13, the busbar component 14 and the battery monomer 12.

[0241] According to some embodiments of the present application, referring to FIG. 1, the present application provides a power consumption device, which includes the battery device 100 in one or more embodiments described above, and the battery device 100 is used to provide electric energy.

[0242] In the above scheme, the battery device 100 in the one or more embodiments has a high energy compensation efficiency, and thus the power consumption device including the battery device 100 in the one or more embodiments has a high energy compensation efficiency.

[0243] According to some embodiments of the present application, referring to FIGS. 4-6 and 17, the present application provides a battery device 100 including a plurality of battery cells 12, a plurality of busbar components 14, and a circuit board 13, the battery cell 12 including a housing 121 and an electrode terminal 123, wherein at least part of the main body portion 131 is stacked with at least part of the busbar component 14 along a first direction X intersecting the first outer end surface 1213, and / or at least part of the main body portion 131 is stacked with at least part of the electrode terminal 123 along the first direction X intersecting the first outer end surface 1213.

[0244] The electrode terminal 123 includes a first electrode terminal 1231 and a second electrode terminal 1232 located at the first outer end surface 1213, the first electrode terminal 1231 and the second electrode terminal 1232 being spaced apart along a second direction Y intersecting the first direction X. The maximum distance of the first electrode terminal 1231 and the second electrode terminal 1232 along the second direction Y is less than the maximum dimension of the main body portion 131 along the second direction Y. The maximum distance between the outer contour of the first electrode terminal 1231 and the outer contour of the second electrode terminal 1232 at the two most distant points in the second direction Y is greater than or equal to the maximum dimension of the circuit board 13 along the second direction Y. The first electrode terminal 1231 and the second electrode terminal 1232 are each stacked with at least part of the main body portion 131 along the first direction X.

[0245] The circuit board 13 is disposed on the first outer end surface 1213 of the housing 121. The circuit board 13 includes a main body portion 131 and a plurality of sampling portions 132, the sampling portion 132 being connected to the main body portion 131 at one end and connected to the busbar component 14 or the battery cell 12 at the other end. At least one sampling portion 132 protrudes from the edge of the main body portion 131 along one side of the second direction Y and is completely stacked with the busbar component 14 along the first direction X.

[0246] The busbar component 14 includes a first busbar component 141 for connecting the first electrode terminal 1231 and a second busbar component 142 for connecting the second electrode terminal 1232, the first busbar component 141 and the second busbar component 142 are arranged in the second direction Y with a maximum distance smaller than the maximum distance of the main body portion 131 in the second direction Y. The first busbar component 141 and the second busbar component 142 are arranged in the first direction X with at least a portion of the main body portion 131 stacked thereon. The first busbar component 141 and the second busbar component 142 are arranged in the first direction X with at least a portion of the main body portion 131 stacked thereon.

[0247] The busbar component 14 includes a positioning hole 147, and the electrode terminal 123 includes a positioning groove 1233, the positioning hole 147 and the positioning groove 1233 are opposite in the through direction of the positioning hole 147. The positioning groove 1233 includes a first positioning groove 12331 on the first electrode terminal 1231 and a second positioning groove 12332 on the second electrode terminal 1232, and the main body portion 131 is located between the first positioning groove 12331 and the second positioning groove 12332 in the second direction Y. The positioning hole 147 includes a first positioning hole 1471 on the first busbar component 141 and a second positioning hole 1472 on the second busbar component 142, and the main body portion 131 is located between the first positioning hole 1471 and the second positioning hole 1472 in the second direction Y. The first busbar component 141 and the first electrode terminal 1231 are connected to form a first solder print 151, and the second busbar component 142 and the second electrode terminal 1232 are connected to form a second solder print 152; the main body portion 131 is located between the first solder print 151 and the second solder print 152 in the second direction Y.

[0248] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a plurality of battery cells, each battery cell comprising a housing and an electrode terminal provided on the housing; a busbar component connected to the electrode terminal, the busbar component being configured to electrically connect the plurality of battery cells; a circuit board provided on a first outer surface of the housing, the circuit board comprising a main body portion and a sampling portion, the sampling portion being connected to the main body portion at one end and connected to the busbar component or the battery cell at the other end; wherein at least part of the main body portion and at least part of the busbar component are stacked along a first direction intersecting the first outer surface, and / or at least part of the main body portion and at least part of the electrode terminal are stacked along the first direction intersecting the first outer surface.

2. The battery device according to claim 1, characterized by The electrode terminal comprises a first electrode terminal and a second electrode terminal located on the first outer surface; The first electrode terminal and the second electrode terminal are spaced apart along a second direction intersecting the first direction, and the maximum distance between the first electrode terminal and the second electrode terminal along the second direction is less than the maximum dimension of the main body portion along the second direction.

3. The battery device of claim 2, wherein The maximum distance between the outer contour of the first electrode terminal and the outer contour of the second electrode terminal at the two most distant points in the second direction is greater than or equal to the maximum dimension of the circuit board along the second direction.

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

5. The battery device of claim 1, wherein The electrode terminal comprises a first electrode terminal and a second electrode terminal located on the first outer surface, and the first electrode terminal and the second electrode terminal are spaced apart along a second direction, and the circuit board comprises a plurality of sampling portions, at least one of which protrudes from the edge of the main body portion on one side along the second direction and is completely stacked along the first direction with the busbar component.

6. The battery device of claim 1, wherein The electrode terminal comprises a first electrode terminal and a second electrode terminal located on the first outer surface; The busbar component comprises a first busbar component and a second busbar component, the first busbar component being configured to connect the first electrode terminal, and the second busbar component being configured to connect the second electrode terminal, and the first busbar component and the second busbar component are spaced apart along a second direction, and the maximum distance between the first busbar component and the second busbar component along the second direction is less than the maximum dimension of the main body portion along the second direction.

7. The battery device of claim 1, wherein The electrode terminal comprises a first electrode terminal and a second electrode terminal located on the first outer surface, and the busbar component comprises a first busbar component and a second busbar component, the first busbar component being configured to connect the first electrode terminal, and the second busbar component being configured to connect the second electrode terminal, and at least part of the first busbar component and at least part of the second busbar component are stacked along the first direction with the main body portion.

8. The battery device according to any one of claims 1 to 7, characterized by, The busbar component is folded along the second direction to form a multi-layer stacked structure.

9. The battery device according to any one of claims 1 to 7, wherein The circuit board comprises a plurality of main body portions stacked along the first direction; At least one of the plurality of body portions is stacked with at least part of the busbar component in a first direction, and / or at least one of the plurality of body portions is stacked with at least part of the electrode terminal in the first direction.

10. The battery device of claim 1, wherein At least part of the circuit board is located between the busbar component and the first outer end surface.

11. The battery device of claim 10, wherein, The body portion and / or the sampling portion of the circuit board is located between the busbar component and the first outer end surface.

12. The battery device according to claim 1 or 10, wherein The circuit board further comprises a temperature measurement assembly connected to at least one sampling line of the circuit board, and the temperature measurement assembly 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, wherein The circuit board comprises a signal lead plug 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, wherein The sampling portion comprises a solder pad connected to the busbar component.

15. The battery device of claim 8, wherein, The multi-layer stacked structure comprises a first busbar sheet layer connected to the electrode terminal and forming a connection region, and a second busbar sheet layer comprising an avoidance through hole at least partially corresponding to the connection region in the first direction, and the second busbar sheet layer is located on a side of the first busbar sheet layer away from the first outer end surface.

16. The battery device according to claim 8 or 15, characterized by The multi-layer stacked structure comprises a first busbar sheet layer connected to the electrode terminal and forming a connection region, and a second busbar sheet layer comprising an avoidance through hole at least partially corresponding to the connection region in the first direction, and the sampling portion is connected to a region of the first busbar sheet layer corresponding to the avoidance through hole in the first direction.

17. The battery device according to any one of claims 1, 8-16, wherein The battery cell has a dimension in a second direction smaller than a dimension in the first direction and larger than a dimension in a third direction, the first direction, the second direction and the third direction being perpendicular to each other, the electrode terminal comprises a first electrode terminal located at a first outer end surface, and the busbar component comprises 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; A maximum distance of the first electrode terminal from an edge of the first outer end surface in the second direction is smaller than a maximum dimension of the body portion in the second direction, and / or a maximum distance of the first busbar component from the edge of the first outer end surface in the second direction is smaller than the maximum dimension of the body portion in the second direction.

18. The battery device of claim 1, wherein, The battery cell comprises a second outer end surface intersecting the first outer end surface, and a plurality of the battery cells are stacked in a third direction perpendicular to the second outer end surface; The electrode terminal is located at the second outer end surface, the busbar component comprises a first connecting section connected to the electrode terminal and a second connecting section connected to the circuit board, and the first connecting section and the second connecting section are angularly intersected and connected; At least part of the body portion is stacked with at least part of the second connecting section in a first direction.

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

20. The battery device of claim 18 or 19, wherein, The maximum distance of the second connecting section and the edge of the first outer end surface in a second direction is less than the maximum dimension of the main body part in the second direction, and the second direction, the first direction and the third direction are perpendicular to each other.

21. The battery device of claim 1, wherein, The main body part and the electrode terminal are connected to form a welding mark, and in the same projection plane perpendicular to the first direction, the main body part and the welding mark are misaligned.

22. The battery device of claim 21, wherein, 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 arranged at intervals in a second direction, and the second direction intersects the first direction, 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 arranged at intervals in a second direction, and the second direction intersects the first direction, In the second direction, the main body part is located between the first welding mark and the second welding mark.

23. The battery device of claim 21, 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 in the second direction is greater than the maximum dimension of the first outer end surface in the third direction, the electrode terminal includes a first electrode terminal located on the first outer end surface, and 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 arranged at intervals in a second direction, and the second direction intersects the first direction, In the second direction, the main body part is located between the first welding mark and the edge of the first outer end surface.

24. The battery device of 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 first electrode terminal and the second electrode terminal are arranged at intervals in a second direction, and the second direction intersects the first direction, In the same projection plane perpendicular to the first direction, the main body part and the positioning hole are misaligned.

25. The battery device of claim 24, wherein, 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 arranged at intervals in 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, and in the second direction, the main body part is located between the first positioning groove and the second positioning groove.

26. The battery device of claim 24, wherein, 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 arranged at intervals in a second direction, and the second direction intersects the first direction, 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 arranged at intervals in a second direction, and the second direction intersects the first direction, The positioning hole includes a first positioning hole located on the first electrode terminal and a second positioning hole located on the second electrode terminal, and in the second direction, the main body part is located between the first positioning hole and the second positioning hole.

27. The battery device of claim 24, wherein, The second direction and the third direction are parallel to the first outer end surface, a maximum dimension of the first outer end surface along the second direction is greater than a 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 slot includes a first positioning slot located on the first electrode terminal. In the second direction, the main body portion is located between the first positioning slot and an edge of the first outer end surface.

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

29. An electrical device, comprising: A battery device as claimed in any one of claims 1 to 28, the battery device being used to provide electrical energy.

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