Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and an electric device. The battery device provided by the embodiment of the utility model comprises a box body, a battery monomer row, an electric connecting piece and a sampling assembly, and an accommodating space is formed in the box body; the battery monomer row comprises a plurality of battery monomers arranged along the first direction, the battery monomer row is accommodated in the accommodating space, and each battery monomer comprises a pole; the electric connecting piece is electrically connected with the pole columns of two of the battery monomers; the sampling assembly comprises a plurality of sampling pieces, at least one of the sampling pieces is connected with the pole, at least another one of the sampling pieces is connected with the electric connecting piece, each sampling piece is provided with a connecting surface, the connecting area of the connecting surface and the pole and the connecting area of the connecting surface and the electric connecting piece, and the area of the smaller one of the connecting areas is S1, the total area of the connecting surfaces is S2, and S1 / S2 is larger than or equal to 0.4 and smaller than or equal to 0.75.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and an electric device. Background Art

[0002] A battery device typically includes multiple battery cells arranged in a housing. The cell terminals are electrically connected to the battery management system via sampling components, which collect parameters such as the cell voltage and current for reference. The sampling components can be connected directly to the cell terminals or to the electrical connectors that connect the cells. Achieving a stable and reliable connection between the sampling components and the cells within the limited space of the battery device, while ensuring the stability and accuracy of the sampled information, remains a technical challenge. Utility Model Content

[0003] The utility model provides a battery device and an electricity-consuming device, and is at least used for improving the stability of sampling.

[0004] In a first aspect, the present invention provides a battery device comprising:

[0005] The box body is formed with a receiving space;

[0006] A battery cell row, comprising a plurality of battery cells arranged along a first direction, the battery cell row being accommodated in the accommodation space, the battery cells comprising poles;

[0007] An electrical connector electrically connecting the poles of two battery cells;

[0008] The sampling assembly includes multiple sampling pieces, at least one of the multiple sampling pieces is connected to the pole, and at least another of the multiple sampling pieces is connected to the electrical connector. The sampling piece has a connection surface, and the smaller of the connection area between the connection surface and the pole and the connection area between the connection surface and the electrical connector is S1. The total area of the connection surface is S2, and 0.4≤S1 / S2≤0.75.

[0009] In the battery device of the embodiment of the present invention, the connection surface forms two connection areas with the pole and the electrical connector respectively, where the smaller connection area is S1 and the total area of the connection surface is S2. By setting the ratio of the connection area S1 to the total area of the connection surface in the range of 0.4 to 0.75, the space occupied by the sampling component is reduced while the connection strength between the sampling component and the pole and the electrical connector is improved, which is conducive to the sampling assembly to stably collect the voltage or current parameters of the battery cell.

[0010] In some embodiments, the electrode includes a first electrode and a second electrode with opposite polarities, the first electrode includes a first main body, the second electrode includes a second main body, and all the first main bodies and second main bodies in the battery cell row are arranged in a row along a first direction.

[0011] The electrical connector includes a first electrical connector for connecting a first main body and a second main body respectively located on adjacent battery cells, or for connecting two first main bodies or two second main bodies respectively located on adjacent battery cells.

[0012] In this way, by arranging all the first main body parts and the second main body parts in the battery cell row in a row along the first direction, the first connecting member connects the first main body parts and the second main body parts on adjacent battery cells, or connects the two first main body parts on adjacent battery cells, or connects the two second main body parts on adjacent battery cells, thereby shortening the length of the first electrical connecting member and reducing the overcurrent resistance.

[0013] In some embodiments, the sampling assembly further includes a main board portion, which is connected to the sampling piece. Along the second direction, the minimum distance between the first pole and the main board portion is smaller than the minimum distance between the second pole and the main board portion. The first pole further includes a first extension portion protruding from the first main body portion along the second direction toward the main board portion. The sampling piece includes a first sampling piece, which is connected to the first extension portion. The second direction is perpendicular to the first direction.

[0014] In this way, by connecting the main board portion and the sampling piece, the minimum distance between the first pole and the main board portion along the first direction is smaller than the minimum distance between the second pole and the main board portion, the first extension portion protrudes toward the main board portion along the second direction, the first sampling piece is connected to the first extension portion, and the second direction is perpendicular to the first direction, thereby shortening the length of the first sampling piece and saving material.

[0015] In some embodiments, the first extension portion extends along the first direction toward the second main body portion and protrudes from the first main body portion, the maximum dimension of the first extension portion along the first direction is greater than the maximum dimension along the second direction, the first sampling piece includes a first conductive sheet and a first connecting portion, the first connecting portion connects the main board portion and the first conductive sheet, the first conductive sheet is connected to the first extension portion, and the maximum dimension of the first conductive sheet along the first direction is greater than the maximum dimension along the second direction.

[0016] In this way, the first extension portion extends along the first direction toward the second main body portion and protrudes from the first main body portion, the maximum dimension of the first extension portion along the first direction is greater than the maximum dimension along the second direction, the first conductive piece of the first sampling member is connected to the first extension portion, and the maximum dimension of the first conductive piece along the first direction is greater than the maximum dimension along the second direction, thereby increasing the connection area between the first sampling member and the pole and improving the connection reliability.

[0017] In some embodiments, the electrical connector also includes a second electrical connector, the battery cell located at the end along the first direction is a first battery cell, the second main body of the first battery cell is connected to the second electrical connector and is used to connect to components other than the battery cell row, and the sampling piece also includes a second sampling piece, which is connected to the second electrical connector.

[0018] In this way, the second main body of the first battery cell is connected to the second electrical connector and is used to connect to components other than the battery cell row. The second sampling component is connected to the second electrical connector, so that the first sampling component and the second sampling component can jointly sample all battery cells in the battery cell row, avoiding sampling omissions and improving sampling accuracy, which is beneficial to improving the precision and accuracy of battery management system regulation.

[0019] In some embodiments, the second sampling member includes a second conductive sheet and a second connecting portion, the second connecting portion connects the main board portion and the second conductive sheet, the second conductive sheet is connected to the second electrical connector, and the maximum dimension of the second conductive sheet along the second direction is greater than the maximum dimension along the first direction.

[0020] In this way, the main board portion and the second conductive sheet are connected through the second connecting portion of the second sampling component, the second conductive sheet of the second sampling component is connected to the second electrical connector, and the maximum dimension of the second conductive sheet along the second direction is greater than the maximum dimension along the first direction, thereby increasing the connection area between the second sampling component and the second electrical connector and improving the connection reliability.

[0021] In some embodiments, the battery device includes a plurality of battery cell rows, at least one battery cell row is connected to another battery cell row adjacent along the second direction via a third electrical connector, and the second sampling member is located at an end of either of the two battery cell rows.

[0022] In this way, at least one battery cell row is connected to another adjacent battery cell row along the second direction via the first electrical connector, thereby increasing the total voltage or total capacity of the battery device. The second sampling member is located at the end of either battery cell row, which facilitates the arrangement and spatial layout of other components in the battery device and avoids sampling omissions.

[0023] In some embodiments, the poles of two adjacent battery cell rows are respectively distributed at two opposite ends of two groups of battery cell rows along the second direction.

[0024] In this way, the poles of two adjacent battery cell rows are distributed at opposite ends along the second direction of the two groups of battery cell rows, thereby reducing the risk of short circuit between battery cell rows and also helping to make a larger space between the two rows of poles, thereby improving space utilization.

[0025] In some embodiments, the battery cell further includes a shell, the pole includes a positive pole and a negative pole, the positive pole and the negative pole are both arranged on the first wall of the shell, the positive pole and the negative pole are arranged at the first end of the first wall along the first direction, and the sampling assembly further includes a main board portion, the main board portion is connected to the sampling piece, and the main board portion is located on the side of the positive pole and the negative pole away from the first end along the first direction.

[0026] In this way, the positive electrode column and the negative electrode column are arranged at the first end of the first wall along the first direction, and the main board portion is located on the side of the positive electrode column and the negative electrode column away from the first end along the first direction, so that the structure is more compact, thereby improving the utilization rate of the space in the box, and further improving the energy density of the battery device.

[0027] In some embodiments, along a direction in which the pole protrudes from the first wall, a top surface of the main plate portion is lower than a top surface of the pole.

[0028] In this way, by setting the main board portion on the first wall and the top surface of the main board portion being lower than the top surface of the pole, the height occupied by the sampling component is reduced, the space utilization rate in the box is improved, and the energy density of the battery device is further improved.

[0029] In some embodiments, the main plate portion is bonded to the first walls of the plurality of battery cells.

[0030] By bonding the main board portion to the first walls of multiple battery cells, the main board portion can fit tightly against the first wall, thereby making full use of limited space, reducing additional connecting components, and facilitating the connection of multiple sampling pieces with poles or electrical connectors.

[0031] In some embodiments, a blocking piece is provided between the first pole and the second pole of the same battery cell, and the blocking piece has insulating properties.

[0032] In this way, by providing an insulating baffle between the positive electrode post and the negative electrode post of the same battery cell, the compactness of the structure is improved while ensuring the insulation between the positive and negative electrodes of the battery cell and reducing the risk of short circuit.

[0033] In some embodiments, the total area S2 of the connection surface satisfies: 90 mm 2 ≤S2≤300mm 2 and / or,

[0034] The smaller of the connection area between the connection surface and the pole or the connection area between the connection surface and the electrical connector S1 satisfies the following requirements: 60mm 2 ≤S1≤200mm 2 .

[0035] In this way, by setting the total area product S2 of the connection surface and / or the connection area S1 of the connection surface within a reasonable range, and the ratio of the connection area S1 to the total area S2 of the connection surface is in the range of 0.4~0.75, the connection strength between the sampling piece and the pole and / or the electrical connector is ensured to be sufficient, so that the sampling piece can perform sampling continuously and stably.

[0036] In some embodiments, the battery device includes a lower case and a cover plate, the inner side of the cover plate includes a groove, and the pole of the battery cell and / or at least a portion of the sampling assembly is located in the groove.

[0037] In this way, by at least partially positioning the poles of the battery cells and / or the sampling assembly in the grooves on the inner side of the cover plate, the structure is made more compact, further saving installation space and contributing to improving energy density.

[0038] In a second aspect, the present invention provides an electrical device, which includes a battery device according to any one of the above embodiments, and the battery device is used to provide electrical energy.

[0039] The electric device according to the embodiment of the present invention includes the battery device according to the above embodiment, and thus has all the beneficial effects of the battery device provided by the embodiment of the present invention.

[0040] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0042] Figure 1 Schematic diagram of the structure of the battery device of some embodiments of the present invention;

[0043] Figure 2 for Figure 1 An enlarged schematic diagram of the battery device in part A;

[0044] Figure 3 for Figure 1 An enlarged schematic diagram of the battery device in part B;

[0045] Figure 4 Schematic diagram of the exploded structure of the battery device in some embodiments of the present invention;

[0046] Figure 5 for Figure 4 An enlarged schematic diagram of the battery device in part C;

[0047] Figure 6 Schematic diagram of the structure of a vehicle according to some embodiments of the present invention.

[0048] Description of main component symbols:

[0049] 100 - battery assembly; 10 - housing; 101 - storage space; 11 - bottom wall; 12 - lower housing; 20 - battery cell; 21 - electrode; 211 - first electrode; 2111 - first main body; 2112 - first extension; 212 - second electrode; 2121 - second main body; 2122 - second extension; 213 - positive electrode; 214 - negative electrode; 22 - housing; 221 - first wall; 2211 - first end; 23 - baffle; 50 - battery cell row; 501 - first battery cell;

[0050] 30 - electrical connector; 31 - first electrical connector; 32 - second electrical connector; 320 - perforation; 33 - third electrical connector; 40 - sampling assembly; 41 - sampling member; 410 - connection surface; 411 - first sampling member; 4111 - first connecting portion; 4112 - first conductive sheet; 412 - second sampling member; 4121 - second connecting portion; 4122 - second conductive sheet; 42 - main board; X - first direction; Y - second direction; Z - third direction;

[0051] 1000-Vehicle; 200-Controller; 300-Motor. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this invention; the terms "including" and "having" and any variations thereof in the specification and claims of this invention and the above-mentioned drawings are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of this utility model, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of this utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0055] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present invention, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0057] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the embodiments of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0059] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0060] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0061] With market expansion and technological advancements, users are placing increasingly stringent demands on the performance and safety of power batteries. Power batteries often require frequent charging and discharging during operation, which can easily lead to problems such as excessive current or excessive temperatures, compromising safety. Collecting battery voltage and current parameters and transmitting them to the Battery Management System (BMS) provides a reference for its control strategies, enabling timely and effective protection. This has become a crucial method for ensuring battery safety.

[0062] In related technologies, battery devices typically include multiple battery cells arranged in a housing. To collect the voltage or current of the battery cells for reference by a battery management system, the battery device is typically equipped with a sampling assembly electrically connected to the battery cells. The battery cells include terminals exposed outside the housing. The sampling assembly's sampling element connects to these terminals to collect parameters from the positive or negative electrode of the corresponding battery cell. However, the terminal's surface area is typically small, making it difficult to maintain a stable connection between the sampling element and the battery cell.

[0063] In view of the above situation, the present invention provides a battery device, in which battery cells are connected to each other through electrical connectors, a sampling piece of a sampling assembly is connected to at least one of a pole and an electrical connector, the sampling piece has a connection surface, a smaller connection area between the connection surface and the pole and the electrical connector is S1, the total area of the connection surface is S2, 0.4≤S1 / S2≤0.75, and by setting the ratio of the connection area S1 to the total area of the connection surface within a reasonable range, the space occupied by the sampling piece is reduced while ensuring a stable connection between the sampling assembly and the battery cell.

[0064] The battery apparatus mentioned in the embodiments of the present invention may include one or more battery assemblies for providing voltage and capacity. The battery assembly may include multiple battery cells, which are connected in series, parallel, or hybrid via a busbar.

[0065] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0066] As an example, the battery assembly may be a battery module, which is formed by arranging and fixing multiple battery cells into an independent module. As an example, the battery module may be formed by bundling multiple battery cells with a cable tie.

[0067] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery assemblies housed in the case.

[0068] As an example, the battery assembly may be a battery module, and the battery assembly may be accommodated in the box by fixing the battery module in the box.

[0069] As an example, the battery assembly may also be housed in the box by directly fixing a plurality of battery cells to the box.

[0070] As an example, the housing may include a first housing and a second housing. The first and second housings snap together to form an enclosed space within the housing to house the battery cells. Enclosed here means covered or closed, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0071] For example, a case may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame to form an enclosed space within the case to accommodate the battery cells. The case can be of various shapes, such as a cylinder or a rectangular parallelepiped.

[0072] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0073] The technical solutions described in the embodiments of the present invention are applicable to various electrical devices that use battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0074] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present invention.

[0075] Please refer to Figures 1 to 3The battery device 100 of the embodiment of the present invention includes a housing 10, a battery cell row 50, an electrical connector 30 and a sampling assembly 40, wherein the housing 10 forms a receiving space 101; the battery cell row 50 includes a plurality of battery cells 20 arranged along a first direction X, the battery cell row 50 is accommodated in the receiving space 101, and the battery cells 20 include poles 21; the electrical connector 30 electrically connects the poles 21 of two of the battery cells 20; the sampling assembly 40 includes a plurality of sampling members 41, at least one of the plurality of sampling members 41 is connected to the pole 21, and at least another of the plurality of sampling members 41 is connected to the electrical connector 30, and the sampling member 41 has a connecting surface 410, and the smaller of the connecting area between the connecting surface 410 and the pole 21 and the connecting area between the connecting surface 410 and the electrical connector 30 is S1, and the total area of the connecting surface 410 is S2, 0.4≤S1 / S2≤0.75.

[0076] Specifically, in the embodiment of the present invention, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell 20 is discharged.

[0077] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel metal hydride battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiment of the present invention.

[0078] In the battery device 100, there may be multiple battery cells 20, which may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery unit 20 may be housed within the housing 10. Alternatively, the battery device 100 may be configured by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit and housed within the housing 10. The battery device 100 may also include other structures. For example, the battery device 100 may include a busbar assembly (electrode posts 21 and electrical connectors 30) to electrically connect the multiple battery cells 20.

[0079] In the embodiments of the present invention, a battery cell 20 generally includes an electrode assembly. The electrode assembly comprises a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charge and discharge process of the battery cell 20, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0080] As an example, the battery cell 20 can be a cylindrical, prismatic, soft-pack battery or other shaped battery cell 20. The prismatic battery cell 20 includes a square shell battery, a blade battery, a polygonal prismatic battery, and the polygonal prismatic battery is, for example, a hexagonal prismatic battery, etc. The present invention has no special restrictions on this.

[0081] The sampling member 41 can be a sheet-like structure or the end structure of a wire, or it can be a block-like, columnar, or irregularly shaped structure. For example, the sampling member 41 is sheet-like and covers the surface of the terminal 21 or the electrical connector 30. The sampling member 41 can be made of a metal material, for example, a nickel sheet. The shape of the connecting surface 410 can be square, circular, elliptical, triangular, polygonal, or other irregular structures, which are not limited by the present invention.

[0082] Optionally, the sampling member 41 can have connection surfaces 410 of varying shapes and sizes depending on the structure and location to which it is connected. The ratio S1 / S2 of the connection area S1 to the total area S2 of the connection surface 410 can fall within different ranges when the connection surface 410 is connected to the terminal 21 or when the connection surface 410 is connected to the electrical connector 30. The connection areas between the terminal 21 of multiple battery cells 20 and the sampling member 41 can be equal or unequal.

[0083] For example, the ratio S1 / S2 of the connection area S1 between the connection surface 410 and the pole 21 to the total area S2 of the connection surface 410 may be 0.4, 0.42, 0.5, 0.56, 0.65, 0.7, or 0.75. For another example, the ratio S1 / S2 of the connection area S1 between the connection surface 410 and the electrical connector 30 to the total area S2 of the connection surface 410 may be 0.4, 0.45, 0.53, 0.58, 0.64, 0.71, or 0.75.

[0084] Optionally, the sampling piece 41 forms a conductive connection with the pole 21 and the electrical connector 30, respectively. The sampling piece 41 can be connected to the pole 21 or the electrical connector 30 by at least one of welding, plugging, snap connection, conductive adhesive bonding, etc. Exemplarily, the sampling piece 41 is welded to the pole 21 and the electrical connector 30, respectively.

[0085] In the battery device 100 of the embodiment of the present invention, the connection surface 410 forms two connection areas with the terminal 21 and the electrical connector 30, respectively. The smaller connection area is S1, and the total area of the connection surface 410 is S2. By setting the ratio of the connection area S1 to the total area of the connection surface 410 in the range of 0.4 to 0.75, the space occupied by the sampling component 41 is reduced while the connection strength of the sampling component 41 with the terminal 21 and the electrical connector 30 is improved, which is conducive to the sampling assembly 40 stably collecting the voltage or current parameters of the battery cell 20.

[0086] See also Figure 2-Figure 4 In some embodiments, the electrode 21 includes a first electrode 211 and a second electrode 212 with opposite polarities. The first electrode 211 includes a first main body 2111, and the second electrode 212 includes a second main body 2121. All the first main bodies 2111 and the second main bodies 2121 in the battery cell row 50 are arranged in a row along the first direction X.

[0087] The electrical connector 30 includes a first electrical connector 31, which is used to connect the first main body 2111 and the second main body 2121 respectively located on adjacent battery cells 20, or the first electrical connector 31 is used to connect two first main bodies 2111 or two second main bodies 2121 respectively located on adjacent battery cells 20.

[0088] Specifically, the first pole 211 is the positive pole 213 , and the second pole 212 is the negative pole 214 ; or, the first pole 211 is the negative pole 214 , and the second pole 212 is the positive pole 213 .

[0089] Optionally, the first main body portions 2111 and the second main body portions 2121 are alternately arranged along the first direction X. In this embodiment, on each battery cell 20 in the battery cell row, the first main body portions 2111 and the second main body portions 2121 are arranged in the same order, the first main body portions 2111 and the second main body portions 2121 of adjacent battery cells 20 are adjacent, and there is a second main body portion 2121 between two first main body portions 2111 of adjacent battery cells 20, and there is a first main body portion 2111 between two second main body portions 2121.

[0090] Optionally, in other embodiments, on each battery cell 20 in the battery cell row 50, the order in which the first main body 2111 and the second main body 2121 are arranged along the first direction X may be inconsistent, and the first main body 2111 and the second main body 2121 in multiple battery cells 20 may be arranged in random order or in multiple arrangement orders to achieve complex series-parallel connections.

[0091] Optionally, the first electrical connector 31 connects one first main body portion 2111 or one second main body portion 2121 on each of two adjacent battery cells 20 , that is, the first electrical connector 31 connects two poles 21 with the same polarity on two adjacent battery cells 20 , so that the two adjacent battery cells 20 can be connected in parallel.

[0092] Optionally, the first electrical connector 31 connects the first main body 2111 and the second main body 2121 of adjacent battery cells 20. That is, the first electrical connector 31 connects the two terminals 21 of opposite polarity on two adjacent battery cells 20, allowing the two adjacent battery cells 20 to be connected in series. In this embodiment, the first main body 2111 and the second main body 2121 of adjacent battery cells 20 may be adjacent, and the first electrical connector 31 may be flat and cover the first main body 2111 and the second main body 2121.

[0093] In this way, by arranging all the first main body portions 2111 and the second main body portions 2121 in the battery cell row 50 in a row along the first direction X, the first connector connects the first main body portions 2111 and the second main body portions 2121 on adjacent battery cells 20, or connects the two first main body portions 2111 on adjacent battery cells 20, or connects the two second main body portions 2121 on adjacent battery cells 20, thereby shortening the length of the first electrical connector 31 and reducing the overcurrent resistance.

[0094] See also Figure 3-Figure 5 In some embodiments, the sampling assembly 40 further includes a main board portion 42, which is connected to the sampling member. Along the second direction Y, the minimum distance between the first pole 211 and the main board portion 42 is smaller than the minimum distance between the second pole 212 and the main board portion 42. The first pole 211 further includes a first extension portion 2112 protruding from the first main body portion 2111 toward the main board portion 42 along the second direction Y. The sampling member includes a first sampling member 411, which is connected to the first extension portion 2112. The second direction Y and the first direction X are perpendicular to each other.

[0095] Specifically, the first extension portion 2112 protrudes from the first main portion 2111 toward the main board portion 42 along the second direction Y. The distance between the end of the first extension portion 2112 extending along the second direction Y and the main board portion 42 is also the minimum distance between the first terminal 211 and the main board portion 42. Along the second direction Y, the end of the second main portion 2121 at the minimum distance from the main board portion 42 may be flush with the location where the first main portion 2111 connects to the first extension portion 2112. The first sampling member 411 is electrically connected to the main board portion 42 and may extend from the main board portion 42 to the first extension portion 2112. The first sampling member 411 partially covers the first extension portion 2112. The first sampling member 411 and the first electrical connector 31 may be staggered.

[0096] The first main portion 2111 and the first extension portion 2112 are connected to each other, and the first main portion 2111 and the first extension portion 2112 form an angle. Because the second direction Y is perpendicular to the first direction X, the first main portion 2111 and the first extension portion 2112 also form an angle of approximately 90°. For example, the cross-sections of the first main portion 2111 and the first extension portion 2112 are both square, and the combined cross-section of the first main portion 2111 and the first extension portion 2112 can approximate a horizontal "L" shape.

[0097] It should be noted that the first pole 211 is directly connected to the main plate 42 through the first sampling member 411 , and the second pole 212 is connected to the first pole 211 on the adjacent battery cell 20 through the first electrical connector 31 and indirectly connected to the first sampling member 411 .

[0098] In this way, by connecting the main plate portion 42 to the sampling member, the minimum distance between the first pole 211 and the main plate portion 42 along the first direction X is smaller than the minimum distance between the second pole 212 and the main plate portion 42. The first extension portion 2112 protrudes toward the main plate portion 42 along the second direction Y. The first sampling member 411 is connected to the first extension portion 2112. The second direction Y is perpendicular to the first direction X, thereby shortening the length of the first sampling member 411 and saving material.

[0099] Optionally, the second terminal 212 includes a second extension portion 2122 extending away from the main plate portion 42 along the second direction Y. The second extension portion 2122 is connected to the second main body portion 2121 and forms an angle. The ends of the first and second main bodies 2111, 2121 in the second direction Y may be flush with each other. In this embodiment, the starting point of the second extension portion 2122 may be flush with one end of the first and second main bodies 2111, 2121. The first extension portion 2112 and the second extension portion 2122 are located on opposite sides of the first and second main bodies 2111, 2121, respectively, along the second direction Y. The first electrical connector 31 may partially cover the second extension portion 2122.

[0100] See also Figure 2 、 Figure 3 and Figure 5 In some embodiments, the first extension portion 2112 extends toward the second main body portion 2121 along the first direction X and protrudes from the first main body portion 2111. The maximum dimension of the first extension portion 2112 along the first direction X is greater than the maximum dimension along the second direction Y. The first sampling member 411 includes a first conductive sheet 4112 and a first connecting portion 4111. The first connecting portion 4111 connects the main body portion 42 and the first conductive sheet 4112. The first conductive sheet 4112 is connected to the first extension portion 2112. The maximum dimension of the first conductive sheet 4112 along the first direction X is greater than the maximum dimension along the second direction Y.

[0101] Specifically, on the same battery cell 20, the first extension portion 2112 extends toward the second main portion 2121 along the first direction X and protrudes beyond the first main portion 2111, meaning that the size of the first extension portion 2112 is larger than the size of the first main portion 2111 along the first direction X. Furthermore, the edge of the first extension portion 2112 away from the first main portion 2111 along the first direction X can be flush with the edge of the second main portion 2121, making the structure more compact.

[0102] The first connecting portion 4111 can be a conductive sheet, a conductive wire, a conductive needle, etc. The first connecting portion 4111 can be connected to the main board portion 42 and the first conductive sheet 4112 by welding, crimping, plugging, conductive adhesive connection, etc. One of the two side surfaces of the first conductive sheet 4112 along its own thickness direction faces the first extension portion 2112, and this side surface is the connecting surface 410 of the first sampling piece 411. The connecting surface 410 at least partially covers the first extension portion 2112, and the area of the portion where the connecting surface 410 overlaps with the first extension portion 2112 is the connection area between the first sampling piece 411 and the pole 21. The first connecting portion 4111 can be connected to the connecting surface 410, and can be connected to the side surface of the first conductive sheet 4112 along the thickness direction that is away from the first extension portion 2112.

[0103] The first conductive sheet 4112 and the first extension 2112 can be in various geometric shapes, such as square, circular, elliptical, or polygonal, and the present invention does not impose any restrictions thereto. To achieve a more compact structure, both the first conductive sheet 4112 and the first extension 2112 can be square. The first connecting portion 4111 can be a conductive sheet. The first connecting portion 4111 extends from the main plate portion 42 along the second direction Y to the side of the first extension 2112. The first conductive sheet 4112 extends from the first connecting portion 4111 along the first direction X to above the first extension 2112.

[0104] Optionally, the first conductive sheets 4112 connected to the poles 21 in the same battery cell row 50 may be arranged in rows along the first direction X and spaced apart in sequence.

[0105] In this way, the first extension portion 2112 extends along the first direction X toward the second main body portion 2121 and protrudes from the first main body portion 2111. The maximum dimension of the first extension portion 2112 along the first direction X is greater than the maximum dimension along the second direction Y. The first conductive piece 4112 of the first sampling member 411 is connected to the first extension portion 2112. The maximum dimension of the first conductive piece 4112 along the first direction X is greater than the maximum dimension along the second direction Y. This increases the connection area between the first sampling member 411 and the pole 21, thereby improving the connection reliability.

[0106] See also Figure 2 and Figure 3In some embodiments, the electrical connector 30 further includes a second electrical connector 32, the battery cell 20 located at the end along the first direction X is a first battery cell 501, the second main body 2121 of the first battery cell 501 is connected to the second electrical connector 32 and is used to connect to components other than the battery cell row 50, and the sampling member 41 further includes a second sampling member 412, which is connected to the second electrical connector 32.

[0107] As described above, the second electrode 212 needs to be connected to the first electrode 211 on the adjacent battery cell 20 through the first electrical connector 31 and indirectly connected to the first sampling component 411. Since the first battery cell 501 is located at the end, the second main body 2121 on the first battery cell 501 is not connected to the first main body 2111 on the adjacent battery cell 20. Therefore, in order to avoid missing sampling at the end, the first battery cell 501 needs to be sampled separately.

[0108] Specifically, the first main body 2111 of the first battery cell 501 is connected to the first main body 2111 of the adjacent battery cell 20 via the first main body 2111, and is indirectly connected to the first sampling member 411. The second main body 2121 of the first battery cell 501 is located at the end of the battery cell row 50 along the first direction X, and the second electrical connector 32 may at least partially cover the second main body 2121. The second electrical connector 32 may extend along the first direction X to the side of the first battery cell 501 facing away from the first main body 2111. The second sampling member 412 is connected to the main plate and the second electrical connector 32. Through the second sampling member 412 and the first sampling member 411 connected to the battery cell 20 adjacent to the first battery cell 501, voltage or current information of the first battery cell 501 can be collected.

[0109] Optionally, the second electrical connector 32 and the plurality of first electrical connectors 31 connected to the same battery cell row 50 may be arranged in sequence along the first direction X.

[0110] The second electrical connector 32 can be connected to another battery cell row 50, or can be connected to the case 10, another electrical connector 30, a water-cooling plate, a support beam or other components. Exemplarily, the second electrical connector 32 is fixedly connected to the case 10. The second electrical connector 32 can be fixedly connected to the case 10 by at least one of welding, fastener connection, riveting, gluing, pressure connection, plug-in connection, and snap-fit connection. Furthermore, the second electrical connector 32 is formed with a through-hole 320, and the second electrical connector 32 is connected to the case 10 by bolts. The inner wall of the case 10 is provided with a screw hole (not shown) corresponding to the through-hole 320 for the bolt (not shown) to pass through the through-hole 320 and the screw hole and fix the second electrical connector 32 and the case 10.

[0111] In this way, the second main body 2121 of the first battery cell 501 is connected to the second electrical connector 32 and is used to connect to components other than the battery cell row 50. The second sampling component 412 is connected to the second electrical connector 32, so that the first sampling component 411 and the second sampling component 412 can jointly sample all battery cells 20 in the battery cell row 50, avoiding sampling omissions and improving sampling accuracy, which is beneficial to improving the precision and accuracy of battery management system regulation.

[0112] See also Figure 2 and Figure 3 In some embodiments, the second sampling member 412 includes a second conductive sheet 4122 and a second connecting portion 4121, the second connecting portion 4121 connects the main board portion 42 and the second conductive sheet 4122, the second conductive sheet 4122 is connected to the second electrical connector 32, and the maximum dimension of the second conductive sheet 4122 along the second direction Y is greater than the maximum dimension along the first direction X.

[0113] Specifically, the second connecting portion 4121 can be a conductive sheet, a conductive wire, a conductive needle, etc. The second connecting portion 4121 can be connected to the main board portion 42 and the second conductive sheet 4122 by welding, crimping, plugging, conductive adhesive connection, etc. One side of the two side surfaces of the second conductive sheet 4122 along its own thickness direction faces the second electrical connector 32, and this side surface is the connecting surface 410 of the second sampling member 412. The connecting surface 410 at least partially covers the second electrical connector 32, and the area where the connecting surface 410 overlaps with the second electrical connector 32 is the connecting area between the second sampling member 412 and the electrical connector 30. The second connecting portion 4121 can be connected to the connecting surface 410 and can be connected to the side surface of the second conductive sheet 4122 along the thickness direction that faces away from the second electrical connector 32.

[0114] The second conductive sheet 4122 can be a variety of geometric shapes, such as square, circular, elliptical, or polygonal, and this is not a limitation of the present invention. To achieve a more compact structure, the second connecting portion 4121 can be a conductive sheet. The second connecting portion 4121 extends from the main plate portion 42 along the second direction Y to a position adjacent to the second battery cell 20. The second conductive sheet 4122 extends from the second connecting portion 4121 along the second direction Y to above the second electrical connector 32. The second connecting portion 4121 and the second conductive sheet 4122 can both be located on the side of the first battery cell 501 facing away from the other battery cells 20 in the same battery cell row 50.

[0115] In this way, the main board portion 42 and the second conductive sheet 4122 are connected through the second connecting portion 4121 of the second sampling member 412, and the second conductive sheet 4122 of the second sampling member 412 is connected to the second electrical connector 32. The maximum dimension of the second conductive sheet 4122 along the second direction Y is greater than the maximum dimension along the first direction X, thereby increasing the connection area between the second sampling member 412 and the second electrical connector 32 and improving the connection reliability.

[0116] See also Figure 1 、 Figure 3 and Figure 4 In some embodiments, the battery device 100 includes a plurality of battery cell rows 50 , at least one battery cell row 50 is connected to another battery cell row 50 adjacent along the second direction Y via a third electrical connector 33 , and the second sampling member 412 is located at an end of either of the two battery cell rows 50 .

[0117] Specifically, the second electrical connector 32 can extend along the first direction X, the third electrical connector 33 can extend along the second direction Y, and the two ends of the third electrical connector 33 along the second direction Y are respectively connected to the two second electrical connectors 32 located at the ends of adjacent battery cell rows 50, and the second sampling member 412 is connected to any one of the above two second electrical connectors 32.

[0118] Optionally, the second electrical connector 32 and the third electrical connector 33 may be an integral structure. The second sampling member 412 may be connected to the third electrical connector 33 .

[0119] In this way, at least one battery cell row 50 is connected to another adjacent battery cell row 50 along the second direction Y via the first electrical connector 31, thereby increasing the total voltage or total capacity of the battery device 100. The second sampling member 412 is located at the end of either battery cell row 50, facilitating adaptation to the arrangement and spatial layout of other components in the battery device 100 while also preventing sampling omissions.

[0120] See also Figure 1 and Figure 4 In some embodiments, the poles 21 of two adjacent battery cell rows 50 are respectively distributed at two opposite ends of the two groups of battery cell rows 50 along the second direction Y.

[0121] Specifically, the two battery cell rows 50 are arranged along the second direction Y, and the edges of the housing 22 of the two battery cell rows 50 adjacent to each other in the second direction Y may contact each other. The poles 21 on each battery cell 20 are disposed at the same end of the first wall 221 of the housing 22 along the second direction Y. The two columns of poles 21 of the two battery cell rows 50 are disposed on opposite sides of the two battery cell rows 50 along the second direction Y. The interval between the two columns of poles 21 along the second direction Y can be connected and can be used to install and accommodate other components.

[0122] When the size of the poles 21 along the second direction Y is much smaller than that of the housing 22 , the distance between the two columns of poles 21 along the second direction Y is close to the size of the two first walls 221 in the second direction Y.

[0123] In this way, the poles 21 of two adjacent battery cell rows 50 are distributed at opposite ends along the second direction Y of the two groups of battery cell rows 50, thereby reducing the risk of short circuit between the battery cell rows 50 and also helping to make a larger space between the two rows of poles 21, thereby improving space utilization.

[0124] See also Figure 4 and Figure 5 In some embodiments, the battery cell 20 further includes a housing 22, and the electrode 21 includes a positive electrode 213 and a negative electrode 214. The positive electrode 213 and the negative electrode 214 are both arranged on the first wall 221 of the housing 22, and the positive electrode 213 and the negative electrode 214 are arranged on the first end 2211 of the first wall 221 along the first direction. The sampling assembly 40 further includes a main board portion 42, which is connected to the sampling member 41 and is located on a side of the positive electrode 213 and the negative electrode 214 that is away from the first end 2211 along the first direction X.

[0125] Specifically, the positive electrode post 213 and the negative electrode post 214 are arranged on the same side of the first wall 221 relative to its own geometric center.

[0126] Optionally, the plurality of battery cells 20 may be arranged within the housing 10 along a first direction X and a second direction Y, where the first direction X and the second direction Y intersect. In some embodiments, the housing 10 is rectangular, the first direction X and the second direction Y are respectively parallel to a side wall of the housing 10 , the first direction X may be the length direction of the housing 10 , and the second direction Y may be the width direction of the housing 10 .

[0127] Furthermore, the box body 10 includes a bottom wall 11 and a top wall (not shown) that are opposite to each other along the third direction Z. The first wall 221 can be disposed toward the top wall. The pole 21 slightly protrudes from the first wall 221 along the third direction Z.

[0128] Optionally, the dimension of the first wall 221 in the second direction Y is significantly larger than the dimension in the first direction X. To make more space, the positive electrode column 213 and the negative electrode column 214 can be arranged at the same end of the two opposite ends of the first wall 221 along the second direction Y.

[0129] In this way, the positive electrode column 213 and the negative electrode column 214 are arranged at the first end 2211 of the first wall 221 along the first direction X, and the main board portion 42 is located on the side of the positive electrode column 213 and the negative electrode column 214 away from the first end 2211 along the first direction X, so that the structure is more compact, thereby improving the utilization rate of the space in the box body 10, and further improving the energy density of the battery device 100.

[0130] In some extended embodiments, the plurality of battery cells 20 may also be stacked along the third direction Z.

[0131] In some embodiments, the housing 22 may 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.

[0132] In some embodiments, the housing 22 can be either sealed or unsealed. For example, if the housing 22 is unsealed, it protects the electrode assembly. A sealing bag is located between the housing 22 and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating material or an aluminum-plastic film. If the housing 22 is sealed, it encapsulates the electrode assembly, electrolyte, and other components.

[0133] See also Figure 2 and Figure 4 In some embodiments, along the direction in which the pole 21 protrudes from the first wall 221 , the top surface of the main plate portion 42 is lower than the top surface of the pole 21 .

[0134] As described above, the pole 21 slightly protrudes from the surface of the first wall 221 along the third direction Z. The third direction Z is also the thickness direction of the pole 21 .

[0135] Specifically, the positive electrode column 213 and the negative electrode column 214 are concentratedly arranged at the same end of the first wall 221 along the second direction Y. The surface of the first wall 221 avoiding the electrode column 21 can form an avoidance space together with the electrode column 21, and the main board part 42 is arranged in the avoidance space.

[0136] In this way, by disposing the main plate portion 42 on the first wall 221 and the top surface of the main plate portion 42 being lower than the top surface of the pole 21 , the height occupied by the sampling assembly 40 is reduced, thereby improving the space utilization within the box 10 , and further facilitating the improvement of the energy density of the battery device 100 .

[0137] See also Figure 1 In some embodiments, the main plate portion 42 is bonded to the first walls 221 of the plurality of battery cells 20 .

[0138] Specifically, the main board portion 42 may be a circuit board. The main board portion 42 may extend continuously along the first direction X and be sequentially bonded to the first walls 221 of the plurality of battery cells 20 .

[0139] In this way, the main board portion 42 is bonded to the first wall 221 of multiple battery cells 20, so that the main board portion 42 can be tightly attached to the first wall 221, thereby making full use of the limited space, reducing additional connecting components, and facilitating the connection of multiple sampling pieces 41 with the poles 21 or electrical connectors 30.

[0140] See also Figure 5 In some embodiments, a blocking piece 23 is provided between the first pole 211 and the second pole 212 of the same battery cell 20 , and the blocking piece 23 has insulating properties.

[0141] Specifically, combined Figure 3 The first and second electrodes 211, 212 of opposite polarity are centrally disposed at the same end of the first wall 221 of the housing 22. Each electrode 21 may have at least one outer contour edge adjacent to or closely adjacent to another electrode 21 of opposite polarity on the same battery cell 20. The blocking piece 23 may extend along the contour line adjacent to or closely adjacent to the first and second electrodes 211, 212 on the same battery cell 20, thereby fully isolating the positive and negative electrodes of the same battery cell 20 while saving space.

[0142] Optionally, the positive electrode post 213 and the negative electrode post 214 of the same battery cell 20 are projected onto the first wall 221 along their thickness direction, and the outer contour of the projection of the positive electrode post 213 can be combined with the outer contour of the projection of the negative electrode post 214 to make the structure compact and improve space utilization. The blocking piece 23 can extend along the adjacent contour edges of the positive electrode post 213 and the negative electrode post 214, and block the opposing and adjacent surfaces of the positive electrode post 213 and the negative electrode post 214.

[0143] In this way, by providing an insulating baffle 23 between the positive electrode post 213 and the negative electrode post 214 of the same battery cell 20 , the compactness of the structure is improved while ensuring the insulation between the positive and negative electrodes of the battery cell 20 and reducing the risk of short circuit.

[0144] Optionally, on a plurality of battery cells 20 arranged along the first direction X, a plurality of blocking pieces 23 are also arranged at intervals along the first direction X. The first electrical connector 31 may be disposed between two adjacent blocking pieces 23 along the first direction X.

[0145] See also Figure 2 In some embodiments, the total area S2 of the connection surface 410 satisfies: 90 mm 2 ≤S2≤300mm 2 and / or,

[0146] The smaller area S1 of the connection area between the connection surface 410 and the pole 21 or the connection area between the connection surface 410 and the electrical connector 30 satisfies the following conditions: 60 mm 2 ≤S1≤200mm 2 .

[0147] Specifically, the total area S2 of the connection surface 410 can be 90 mm 2 , 105mm 2 , 148mm 2 , 226mm 2 , 249mm 2 , 300mm 2 When the connection area between the connection surface 410 and the pole 21 is less than or equal to the connection area between the connection surface 410 and the electrical connector 30, the connection area S1 between the connection surface 410 and the pole 21 may be 60 mm. 2 , 75mm 2 , 86mm 2 , 110mm 2 , 193mm 2 , 200mm 2 In the case where the connection area between the connection surface 410 and the electrical connector 30 is less than or equal to the connection area between the connection surface 410 and the pole 21, the connection area S1 between the connection surface 410 and the electrical connector 30 may be 60mm 2 , 60mm 2 , 60mm 2 , 60mm 2 , 60mm 2 , 200mm 2 .

[0148] In this way, by setting the total area S2 of the connection surface 410 and / or the connection area S1 within a reasonable range, and the ratio of the connection area S1 to the total area S2 of the connection surface 410 is in the range of 0.4 to 0.75, the connection strength between the sampling member 41 and the pole 21 and / or the electrical connector 30 is ensured to be sufficient, so that the sampling member 41 can perform sampling continuously and stably.

[0149] See also Figure 5 In some embodiments, the battery device 100 includes a lower box 12 and a cover (not shown), the inner side of the cover includes a groove (not shown), and the pole 21 of the battery cell 20 and / or at least a portion of the sampling assembly 40 is located in the groove.

[0150] Specifically, the cover plate is assembled with the lower case 12 to form a closed space within the battery device 100. Multiple battery cells 20 can be disposed within the lower case 12, with the first walls 221 of the battery cells 20 facing the cover plate. The terminals 21 and portions of the sampling assembly 40 protrude from the first walls 221. A recess is formed from the cover plate toward the surface of the first wall 221, accommodating portions of the terminals 21 and / or the sampling assembly 40 within the recess. This shortens the distance between the first wall 221 and the cover plate, thereby reducing the size of the battery device 100 along the direction of the first wall 221 and the cover plate.

[0151] In this way, by positioning at least a portion of the pole 21 of the battery cell 20 and / or the sampling assembly 40 in the groove on the inner side of the cover, the structure is made more compact, further saving installation space and contributing to improving energy density.

[0152] In a second aspect, the present invention provides an electrical device, which includes the battery device 100 according to any one of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0153] The electric device according to the embodiment of the present invention includes the battery device 100 according to the above embodiment, and thus has all the beneficial effects of the battery device 100 provided by the embodiment of the present invention.

[0154] Please refer to Figure 6 , Figure 6 Schematic diagram of the structure of the vehicle 1000 provided for some embodiments of the present invention. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000. The battery device 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000. For example, the battery device 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0155] In some embodiments of the present invention, the battery device 100 can serve not only as an operating power source for the vehicle 1000 , but also as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .

[0156] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein the box body is formed with a receiving space; A battery cell row, comprising a plurality of battery cells arranged along a first direction, wherein the battery cell row is accommodated in the accommodation space, and the battery cells include poles; An electrical connector electrically connecting two of the battery cells; A sampling assembly comprising a plurality of sampling pieces, at least one of the plurality of sampling pieces being connected to the pole, and at least another of the plurality of sampling pieces being connected to the electrical connector, the sampling piece having a connection surface, a connection area between the connection surface and the pole, and a smaller connection area between the connection surface and the electrical connector being S1, a total area of the connection surfaces being S2, and 0.4≤S1 / S2≤0.

75.

2. The battery device according to claim 1, wherein: The pole includes a first pole and a second pole with opposite polarities, the first pole includes a first main body, the second pole includes a second main body, and all the first main bodies and the second main bodies in the battery cell row are arranged in a row along the first direction. The electrical connector includes a first electrical connector, which is used to connect the first main body and the second main body respectively located on adjacent battery cells, or the first electrical connector is used to connect two first main bodies or two second main bodies respectively located on adjacent battery cells.

3. The battery device according to claim 2, characterized in that The sampling assembly also includes a main board portion, which is connected to the sampling piece. Along the second direction, the minimum distance between the first pole and the main board portion is smaller than the minimum distance between the second pole and the main board portion. The first pole also includes a first extension portion protruding from the first main body portion along the second direction toward the main board portion. The sampling piece includes a first sampling piece, which is connected to the first extension portion. The second direction is perpendicular to the first direction.

4. The battery device according to claim 3, characterized in that The first extension portion extends toward the second main body portion along the first direction and protrudes from the first main body portion. The maximum dimension of the first extension portion along the first direction is greater than the maximum dimension along the second direction. The first sampling member includes a first conductive sheet and a first connecting portion. The first connecting portion connects the main board portion and the first conductive sheet. The first conductive sheet is connected to the first extension portion. The maximum dimension of the first conductive sheet along the first direction is greater than the maximum dimension along the second direction.

5. The battery device according to claim 4, characterized in that The electrical connector also includes a second electrical connector, the battery cell located at the end along the first direction is a first battery cell, the second main body of the first battery cell is connected to the second electrical connector and is used to connect to components other than the battery cell row, and the sampling piece also includes a second sampling piece, which is connected to the second electrical connector.

6. The battery device according to claim 5, characterized in that The second sampling member includes a second conductive sheet and a second connecting portion, the second connecting portion connects the main board portion and the second conductive sheet, the second conductive sheet is connected to the second electrical connector, and the maximum dimension of the second conductive sheet along the second direction is greater than the maximum dimension along the first direction.

7. The battery device according to claim 5, characterized in that The battery device includes a plurality of battery cell rows, at least one of which is connected to another adjacent battery cell row along the second direction via a third electrical connector, and the second sampling member is located at an end of any one of the two battery cell rows.

8. The battery device according to claim 7, characterized in that The poles of two adjacent battery cell rows are respectively distributed at two opposite ends of the two groups of battery cell rows along the second direction.

9. The battery device according to claim 2, wherein: The battery cell also includes a shell, the pole includes a positive pole and a negative pole, the positive pole and the negative pole are both arranged on the first wall of the shell, the positive pole and the negative pole are arranged at the first end of the first wall along the first direction, the sampling assembly also includes a main board portion, the main board portion is connected to the sampling piece, and the main board portion is located on the side of the positive pole and the negative pole away from the first end along the first direction.

10. The battery device according to claim 9, characterized in that Along the direction in which the pole protrudes from the first wall, the top surface of the main plate portion is lower than the top surface of the pole.

11. The battery device according to claim 9, characterized in that The main plate portion is adhered to the first walls of the plurality of battery cells.

12. The battery device according to claim 2, characterized in that A blocking piece is provided between the first pole and the second pole of the same battery cell, and the blocking piece has insulating properties.

13. The battery device according to claim 1, wherein: The total area S2 of the connection surface satisfies: 90mm 2 ≤S2≤300mm 2 and / or, The smaller area S1 of the connection area between the connection surface and the pole and the electrical connector satisfies the following conditions: 60mm 2 ≤S1≤200mm 2 .

14. The battery device according to any one of claims 1 to 13, characterized in that: The battery device includes a lower box and a cover plate. The inner side of the cover plate includes a groove. At least a portion of the pole of the battery cell and / or the sampling assembly is located in the groove.

15. An electrical device, characterized in that: The battery device comprises the battery device according to any one of claims 1 to 14, wherein the battery device is used to provide electrical energy.

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