Battery devices and power-consuming devices

Abstract

The present application provides a battery device and an electrical device, which belong to the field of batteries. The battery device includes a battery cell and a connection assembly. The connection assembly includes a first busbar, and the first busbar is connected to the battery cell. The first busbar includes a first spacer, and the first spacer is located on at least one of the first surface and the second surface. The first spacer is configured to separate two adjacent first busbars. In the case of stacking on the first busbar, the first spacer can separate the two adjacent first busbars, and a gap appears between the two first busbars. Through this gap, the stacked first busbar can be identified in time, and the multiple superimposed first busbars can be removed in time. In image recognition, since the grayscale value of the gap is different from the grayscale value of the first busbar, the stacking phenomenon can be identified in time in image recognition. In the subsequent welding process, the risk of failure of the connection between the battery cell and the first busbar is reduced, and the stability of the battery device is improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, playing a crucial role in promoting energy transformation and sustainable development. Battery technology is a crucial factor in the development of the new energy industry.

[0003] The battery device includes battery cells and a busbar. The battery cells are connected to the busbar, and the busbar can transmit the current of the battery cells to an external circuit to enable the battery device to supply power to other devices.

[0004] The busbar is a sheet-like structure. During the installation process, it is easy for two or even more busbars to overlap. Due to the thin thickness of the busbar, the stacked busbars are difficult to identify. When the stacked busbars are connected to the battery cells, it is easy to cause problems such as loose connection or even connection failure, affecting the stability of the battery device. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device and an electrical device to improve the stability of the battery device.

[0006] An embodiment of the first aspect of the present application provides a battery device, which includes: a battery cell; a connecting assembly, including a first busbar, the first busbar being connected to the battery cell, the first busbar having a first surface and a second surface opposite to each other along a thickness direction, the first busbar including a first spacer, the first spacer being located on at least one of the first surface and the second surface, the first spacer being configured to separate two adjacent first busbars.

[0007] In the technical solution of the embodiment of the present application, when stacking occurs on the first busbar, the first spacer can separate two adjacent first busbars, creating a gap between the two first busbars. This gap allows staff to promptly identify stacked first busbars and remove any stacked first busbars. During image recognition, because the grayscale value of the gap differs from that of the first busbar, stacking can be promptly identified. This reduces the risk of connection failure between the battery cells and the first busbar during subsequent welding, improving the stability of the battery device.

[0008] In some embodiments, the first spacer is located at the edge of the first busbar. The middle area of ​​the first busbar is used for connection with the battery cell to ensure the connection area between the first busbar and the battery cell, improve the security of the connection between the first busbar and the battery cell, and the first spacer is arranged at the edge of the first busbar to reduce the impact of the first spacer on the security of the connection between the first busbar and the battery cell.

[0009] In some embodiments, the first spacer includes a folded portion, which is a protruding structure formed by folding a portion of the first busbar toward at least one of the first and second surfaces. Forming the folded portion by folding the first spacer on the first or second surface simplifies the operation of forming the first spacer, simplifying the overall production process. Furthermore, there is no need to place the first spacer on the first busbar by other means, thereby minimizing the impact on the first busbar.

[0010] In some embodiments, the first busbar has a first edge and a second edge that are connected and adjacent to each other, and a fold line of the folded portion intersects both the first edge and the second edge. The folded portion is located at the intersection of the first edge and the second edge, that is, folded at an inner corner of the first busbar. This can minimize the volume occupied by the folded portion within the first busbar and reduce the impact of the fold on the first busbar.

[0011] In some embodiments, the first spacer includes a thickened portion, which is a raised structure located on at least one of the first surface and the second surface. By providing the thickened portion to form the first spacer, the position of the thickened portion can be adjusted as needed without interfering with other components.

[0012] In some embodiments, the first busbar has a first edge and a second edge that are connected and adjacent to each other; the thickened portion is located at the intersection of the first edge and the second edge; and / or the first edge is longer than the second edge, and the thickened portion is located at the first edge. The thickened portion is located at least at the first edge. The longer first edge provides more space for arranging the thickened portion, allowing for more flexible placement of the thickened portion.

[0013] In some embodiments, the first busbar further includes a second spacer, the second spacer and the first spacer being located on the same surface of the first surface and the second surface, and the first spacer and the second spacer being spaced apart. When two first busbars are symmetrically overlapped, since the second spacer and the first spacer are located on the same surface of the first surface and the second surface, and the first spacer and the second spacer are spaced apart, the second spacer can separate two adjacent first busbars, thereby enabling identification of the stacked first busbars.

[0014] In some embodiments, the second spacer is located at the edge of the first busbar. The middle area of ​​the first busbar is used for connection with the battery cell to ensure the connection area between the first busbar and the battery cell, improve the security of the connection between the first busbar and the battery cell, and the second spacer is arranged at the edge of the first busbar to reduce the impact of the second spacer on the security of the connection between the first busbar and the battery cell.

[0015] In some embodiments, when the first busbar has a first edge and a second edge that are connected and adjacent to each other, the length of the first edge is greater than the length of the second edge, and the second spacer is located at the first edge. The longer first edge provides more space for arranging the second spacer, allowing for more flexible placement of the second spacer.

[0016] In some embodiments, the first busbar has two first edges connected by a second edge, and each of the first edges has at least one second spacer. The second spacer is disposed on both first edges, with at least one second spacer being located on a different edge from the first spacer. When two first busbars are symmetrically overlapped, the at least one second spacer can separate the two adjacent first busbars, thereby enabling identification of the first busbar laminations.

[0017] In some embodiments, the second spacer includes a protrusion and / or a stamping portion formed by stamping. Forming the second spacer by providing the protrusion and / or the stamping portion is simple to operate and can simplify the overall production process.

[0018] In some embodiments, a battery device includes at least two connection assemblies, and further includes a connecting busbar. In any two adjacent connection assemblies, one end of the connecting busbar is connected to the first busbar in one of the connection assemblies, and the other end of the connecting busbar is connected to the first busbar in the other connection assembly. The first surface of the connecting busbar has a first spacer, and the second surface is connected to the connecting busbar. The connecting busbar is thinner than the battery cells, making it more difficult to connect the first busbar to the connecting busbar. The second surface of the first busbar does not have the first spacer, making it easier to connect the second surface to the connecting busbar.

[0019] An embodiment of the second aspect of the present application provides an electrical device, which includes the battery device of any one of the above embodiments, and the battery device is used to provide electrical energy.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, 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 application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0023] Figure 2 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0024] Figure 3 A schematic diagram of a structure including connection components provided for other embodiments of the present application;

[0025] Figure 4 In the embodiment of this application Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 A schematic diagram of the first bus structure provided in some embodiments of the present application;

[0027] Figure 6 A schematic structural diagram of a first bus bar from another perspective provided in some embodiments of the present application;

[0028] Figure 7 A schematic diagram of the first bus structure provided in some other embodiments of the present application;

[0029] Figure 8 A schematic structural diagram of another connection assembly provided in an embodiment of the present application;

[0030] Figure 9 for Figure 8 A partial enlarged view of point B in the middle;

[0031] Figure 10 for Figure 3 A partial enlarged view of point C in the middle;

[0032] Figure 11 for Figure 3 The exploded view of the enlarged part of point C in the middle from another perspective;

[0033] Figure 12 A schematic structural diagram of a reinforcement plate provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1000, vehicle; 1001, battery device; 1002, controller; 1003, motor; 10, battery cell; 20, connecting assembly; 21, first bus; 211, first spacer; 2111, folding portion; 2112, thickening portion; 212, second spacer; 22, second bus; 221, main body; 2211, first main body; 2212, second main body; 2213, second bending portion; 222, extension portion; 2221, first observation hole; 2222, second observation hole; 2223, avoidance hole; 223, first A bending portion; 23. Circuit board; 24. Nickel sheet; 25. Main positive bus; 26. Main negative bus; S1. First surface; S2. Second surface; L1. First edge; L2. Second edge; L3. Third edge; L4. Fourth edge; 30. Box; 31. First part; 32. Second part; 40. Connecting bus; 50. Carrier; 60. Temperature detection component; 61. Thermal pad; 62. Temperature detection sensor; 63. Reinforcement plate; 631. Mounting hole; 632. Third observation hole; 633. Positioning hole; 64. Transparent cover. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application will be 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 application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of this application, 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 indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0039] References herein to "embodiments" 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 application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following 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 associated objects are in an "or" relationship.

[0041] In the description of the embodiments of the present application, 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).

[0042] In the description of the embodiments of the present application, 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 application 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0044] Currently, market developments indicate that rechargeable batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in various electronic devices, including electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, market demand is also growing.

[0045] The battery device includes multiple battery cells connected in series and parallel. The battery cells are connected to corresponding busbars. The busbars realize the series and parallel connection between the battery cells. At the same time, the busbars can also transmit the current of the battery cells to the external circuit to realize the battery device to supply power to other devices. It is easy for two or even more busbars to overlap. Due to the thin thickness of the busbar, the stacked busbars are not easy to identify. The battery cells and busbars are generally connected by welding. When welding the same type of battery cells and busbars, the welding power is certain. If the stacked busbars are welded to the battery cells, it is easy to have a cold weld, resulting in poor welding effect and affecting the stability of the battery device.

[0046] The embodiments of the present application provide a battery device that can reduce the risk of failure in the connection between a battery cell and a bus bar and improve the stability of the battery device.

[0047] The battery devices disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power supply system comprising the battery devices disclosed in this application can be constructed to reduce the risk of failure in the busbar-to-battery cell connection, thereby improving the stability and lifespan of the battery device.

[0048] The present invention provides an electrical device that uses a battery device as a power source. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0049] An embodiment of the present application also provides an energy storage device that uses a battery device as a power source. The energy storage device may be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0050] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0051] Please refer to Figure 1 , Figure 1Schematic diagram of the structure of the vehicle provided for some embodiments of the present application. 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 1001 is provided inside the vehicle 1000, and the battery device 1001 can be provided at the bottom, head or tail of the vehicle 1000. The battery device 1001 can be used to power the vehicle 1000. For example, the battery device 1001 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a motor 1003. The controller 1002 is used to control the battery device 1001 to power the motor 1003, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0052] In some embodiments of the present application, the battery device 1001 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0053] The embodiment of the present application provides a battery, Figure 2 Schematic diagram of the exploded structure of the battery provided in some embodiments of the present application. Figure 2 The battery device 1001 includes a battery cell 10. The battery device 1001 also includes a connecting component 20 ( Figure 2 not shown). Figure 3 Schematic diagrams of structures including connection components are provided for other embodiments of the present application. Figure 4 In the embodiment of this application Figure 3 A magnified view of the middle A. Figure 3 and Figure 4 The connecting assembly 20 includes a first bus bar 21 , wherein the first bus bar 21 is connected to the battery cell 10 . Figure 5 A schematic diagram of the first bus structure provided in some embodiments of the present application. Figure 6 This is a structural diagram of the first busbar from another perspective provided in some embodiments of the present application. Figure 5 and Figure 6 The first busbar 21 has a first surface S1 and a second surface S2 opposite to each other along the thickness direction. The first busbar 21 includes a first spacer 211. The first spacer 211 is located on at least one surface of the first surface S1 and the second surface S2. The first spacer 211 is configured to separate two adjacent first busbars 21.

[0054] Please refer to Figure 2The battery device 1001 also includes a housing 30. The battery cells 10 and the connector assembly 20 are both housed within the housing 30. The housing 30 provides a storage space for the battery cells 10 and the connector assembly 20 and can have various structures. In some embodiments, the housing 30 can include a first portion 31 and a second portion 32, which overlap each other and together define a storage space for the battery cells 10 and the connector assembly 20. The second portion 32 can be a hollow structure with one end open. The first portion 31 can be a plate-like structure, with the first portion 31 overlapping the open side of the second portion 32, so that the first portion 31 and the second portion 32 together define a storage space. Alternatively, the first portion 31 and the second portion 32 can each be a hollow structure with one end open, with the open side of the first portion 31 overlapping the open side of the second portion 32. Of course, the housing 30 formed by the first portion 31 and the second portion 32 can have various shapes, such as a cylinder or a rectangular parallelepiped.

[0055] The battery device 1001 may include multiple battery cells 10, which may form multiple battery cell groups. Each battery cell group includes multiple battery cells 10. A battery cell group is connected to a corresponding connecting assembly 20. The battery cells 10 in the battery cell group are connected to the busbars in the corresponding connecting assembly 20, wherein the busbars in the connecting assembly 20 include a first busbar 21. The multiple battery cells 10 may be connected in series, in parallel, or in a hybrid manner. A hybrid manner refers to a combination of series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid manner, and then the entire battery cell group may be housed within a housing 30. Alternatively, the battery device 1001 may be formed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid manner to form a battery cell group, and then the multiple battery cell groups may be connected in series, in parallel, or in a hybrid manner to form an entire battery cell group and housed within a housing 30. The connecting assembly 20 is used to achieve electrical connection between the multiple battery cells 10.

[0056] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be cylindrical, flat, rectangular, or in other shapes.

[0057] In an embodiment of the present application, the connection component 20 may include only the first bus 21; or the connection component 20 may also include other busbars, for example, the connection component 20 may also include the second busbar 22. The first busbar 21 and the second busbar 22 are collectively referred to as buses.

[0058] In an embodiment of the present application, the battery device 1001 may include one or more battery cell groups, the number of connecting components 20 corresponds to the number of battery cell groups, one battery cell group is connected to one connecting component 20, and the battery cells 10 in the battery cell group are connected to the busbars in the connecting component 20. For example, the battery device 1001 includes three battery cell groups and three connecting components 20, and the three battery cell groups are connected to the three connecting components 20 in a one-to-one correspondence. Of course, the battery device 1001 may also include other numbers of connecting components, such as Figure 3 In FIG. 1 , the battery device 1001 includes two connection components 20 .

[0059] In an embodiment of the present application, for interconnected battery cell groups and connection assemblies 20 , the battery cells 10 and busbars may be connected one-to-one. For example, one battery cell 10 is connected to one busbar, and one busbar is connected to one battery cell 10 .

[0060] In other embodiments of the present application, for interconnected battery cell groups and connection assemblies 20, the battery cells 10 and busbars may not be connected one-to-one. For example, one battery cell 10 is connected to one busbar, and one busbar may be connected to multiple battery cells 10; for example, one battery cell 10 may be connected to one busbar, and one busbar may be connected to two battery cells 10. When a busbar is connected to at least one battery cell 10, the number of battery cells 10 connected to different busbars may be equal or different. For example, the first busbar 21 is connected to one battery cell 10, and the second busbar 22 is connected to two battery cells 10.

[0061] In the embodiment of the present application, the battery cells 10 and the busbars may be connected by welding.

[0062] For example, the busbar may be referred to as a busbar. The material of the busbar may include at least one of aluminum, copper, silver, and nickel.

[0063] In the embodiment of the present application, the first busbar 21 is a sheet-like structure, and the first spacer 211 may be located on one of the first surface S1 and the second surface S2 , or the first spacer 211 may be located on both the first surface S1 and the second surface S2 .

[0064] In some embodiments, when installing the first bus 21, the staff generally manually takes out the first bus 21 from the storage box and then places the first bus 21 in the designated position. Since the thickness of the first bus 21 is very thin, if there is a stacking phenomenon on the first bus 21, it is difficult for the staff to identify it.

[0065] In other embodiments, after the first busbar 21 is placed in a designated location, a side view of the first busbar 21 is photographed to obtain a side view image of the first busbar 21. This side view image is then inspected to identify whether the first busbar 21 is laminated. Because the first busbar 21 is very thin, the side view image of a laminated first busbar 21 is very similar to that of a single first busbar 21, making it difficult to identify the difference.

[0066] Exemplarily, the photographing device may include a CCD (Charge-Coupled Device).

[0067] In an embodiment of the present application, a first spacer 211 is provided on the first busbar 21. In the event of lamination on the first busbar 21, the first spacer 211 can separate two adjacent first busbars 21, resulting in a gap between the two first busbars 21. This gap allows staff to promptly identify laminated first busbars 21 and promptly remove multiple stacked first busbars 21. During image recognition, since the grayscale value of the gap differs from that of the first busbar 21, lamination can be promptly identified. This reduces the risk of connection failure between the battery cell 10 and the first busbar 21 during subsequent welding, thereby improving the stability of the battery device 1001.

[0068] In an embodiment of the present application, when stacked first busbars 21 appear, there is a gap between the two first busbars 21. The gap has a different touch from the first busbars 21, and the staff can identify it in time. The staff can also more easily separate the stacked first busbars 21 through the gap.

[0069] If both first busbars 21 are provided with a first spacer 211 on one of the first surface S1 and the second surface S2, for example, both first busbars 21 are provided with a first spacer 211 on the first surface S1, and the second surfaces S2 of the two first busbars 21 overlap facing each other, since both first busbars 21 have the first spacer 211, both opposite sides of the structure formed by the stacked first busbars 21 have the first spacer 211, making it easier for workers to identify the stacking of the first busbars 21. Furthermore, during image recognition, the stacking of the first busbars 21 can also be identified by the first spacers 211 on the opposite sides.

[0070] In the embodiment of the present application, the second busbar 22 may or may not be provided with the first spacer, and the embodiment of the present application does not limit this.

[0071] According to some embodiments of the present application, the first spacer 211 is located at an edge of the first busbar 21 .

[0072] In an embodiment of the present application, the first busbar 21 has a first edge L1 and a second edge L2 that are connected to each other and adjacent to each other, and the first spacer 211 can be located at one edge of the first edge L1 and the second edge L2, or the first spacer 211 is located at both the first edge L1 and the second edge L2.

[0073] In the embodiment of the present application, the first spacer 211 being located at the edge of the first busbar 21 can be understood as at least a portion of the edge of the first spacer 211 at least partially overlapping with the edge of the first busbar 21 .

[0074] In an embodiment of the present application, the middle area of ​​the first bus bar 21 is used to connect to the battery cell 10 to ensure the connection area between the first bus bar 21 and the battery cell 10, improve the firmness of the connection between the first bus bar 21 and the battery cell 10, and set the first spacer 211 at the edge of the first bus bar 21 to reduce the influence of the first spacer 211 on the firmness of the connection between the first bus bar 21 and the battery cell 10.

[0075] According to some embodiments of the present application, see Figure 5 and Figure 6 The first spacer 211 includes a folded portion 2111 , which is a protruding structure formed by folding a portion of the first bus bar 21 toward at least one of the first surface S1 and the second surface S2 .

[0076] For example, in Figure 5 and Figure 6 In the embodiment, a portion of the first busbar 21 is folded from the second surface S2 to the first surface S1 to form a folded portion 2111, that is, the first spacer 211 is located on the first surface S1. In other implementations, a portion of the first busbar 21 can be folded from the first surface S1 to the second surface S2 to form a folded portion 2111, that is, the first spacer 211 is located on the second surface S2. Alternatively, the first spacer 211 includes at least two folded portions 2111, a portion of the first busbar 21 is folded from the second surface S2 to the first surface S1 to form at least one folded portion 2111, and a portion of the first busbar 21 is folded from the first surface S1 to the second surface S2 to form at least one folded portion 2111, that is, the first spacer 211 is located on both the first surface S1 and the second surface S2.

[0077] In an embodiment of the present application, the folding portion 2111 can be folded along a preset folding line.

[0078] In the embodiment of the present application, the predetermined folding line may intersect both the first edge L1 and the second edge L2. Alternatively, the first busbar 21 may have two opposing and spaced first edges L1 connected by the second edge L2, and the predetermined folding line may intersect the two first edges L1 but not the second edge L2.

[0079] In an embodiment of the present application, a folding portion 2111 is formed by folding, and the folding portion 2111 forms a first spacer 211 on the first surface S1 or the second surface S2. The operation of forming the first spacer 211 by this method is simple, and the overall production process can be simplified. At the same time, there is no need to set the first spacer 211 on the first bus 21 in other ways to reduce the impact on the first bus 21.

[0080] According to some embodiments of the present application, see Figure 5 and Figure 6 The folding line of the folding portion 2111 intersects both the first edge L1 and the second edge L2.

[0081] In the embodiment of the present application, when the folded portion 2111 is not formed, the shape of the first bus bar 21 is substantially a quadrilateral, and the first edge L1 and the second edge L2 are two adjacent sides of the quadrilateral first bus bar 21 .

[0082] Exemplarily, the first edge L1 is a long side, the second edge L2 is a short side, and the first edge L1 and the second edge L2 are connected by an arc angle.

[0083] In an embodiment of the present application, the folding portion 2111 is located at the intersection of the first edge L1 and the second edge L2, that is, an inner corner of the first bus 21 is folded, which can minimize the volume occupied by the folding portion 2111 in the first bus 21 and reduce the impact of the folding on the first bus 21.

[0084] At the same time, if the folding portion 2111 is larger, the thickness of the first bus 21 will increase more, and the space required in the battery device 1001 for arranging the first bus 21 will also be larger, affecting the energy density of the battery device 1001. The folding portion 2111 in the embodiment of the present application is located at the intersection of the first edge L1 and the second edge L2, which can minimize the volume occupied by the folding portion 2111 in the first bus 21 and reduce the impact on the energy density of the battery device 1001.

[0085] Since an inner corner of the first busbar 21 is folded, the folded portion 2111 can be located at the edge of the first busbar 21 .

[0086] According to some embodiments of the present application, Figure 7Schematic diagram of the first bus structure provided in some other embodiments of the present application. Figure 7 The first spacer 211 includes a thickened portion 2112 , which is a protruding structure located on at least one of the first surface S1 and the second surface S2 .

[0087] In an embodiment of the present application, the thickened portion 2112 may be integrally formed with the body of the first busbar 21 , or the thickened portion 2112 may be connected to the body of the first busbar 21 by welding, bonding or other connection methods.

[0088] For example, in Figure 7 In the embodiment, the thickened portion 2112 is located on the first surface S1. In other implementations, the thickened portion 2112 may be located on the second surface S2, or the thickened portion 2112 is located on both the first surface S1 and the second surface S2.

[0089] In the embodiment of the present application, the first spacer 211 is formed by providing a thickened portion 2112 , and the position of the thickened portion 2112 can be adjusted as needed, without interfering with other components.

[0090] According to some embodiments of the present application, the thickened portion 2112 is located at the intersection of the first edge L1 and the second edge L2. And / or, the length of the first edge L1 is greater than the length of the second edge L2, and the thickened portion 2112 is located at the first edge L1.

[0091] In some embodiments, the first spacer 211 includes a thickened portion 2112 , and the thickened portion 2112 is located at the intersection of the first edge L1 and the second edge L2 ; or the thickened portion 2112 is located at the first edge L1 .

[0092] In other embodiments, the first spacer 211 includes at least two thickened portions 2112 , at least one thickened portion 2112 is located at the intersection of the first edge L1 and the second edge L2 , and at least one thickened portion 2112 is located at the first edge L1 .

[0093] It can be understood that the thickened portion 2112 is at least located at the first edge L1.

[0094] The first edge L1 is longer, so there is more space for arranging the thickened portion 2112 , and the position of the thickened portion 2112 can be arranged more flexibly.

[0095] According to some embodiments of the present application, see Figures 4 to 6 The first busbar 21 further includes a second spacer 212 . The second spacer 212 and the first spacer 211 are located on the same surface of the first surface S1 and the second surface S2 . The first spacer 211 and the second spacer 212 are spaced apart.

[0096] In some embodiments, the second spacer 212 may also be located at an edge of the first busbar 21 . The second spacer 212 and the first spacer 211 may be located at the same edge of the first busbar 21 or at different edges of the first busbar 21 .

[0097] The first spacer 211 and the second spacer 212 are spaced apart from each other, which means that there is a certain gap between the first spacer 211 and the second spacer 212. For example, along the extending direction of any edge of the first busbar 21, the first spacer 211 and the second spacer 212 are spaced apart from each other.

[0098] Since the first spacer 211 is located at the edge of the first bus 21, if both of the first bus bars 21 are provided with the first spacer 211 on one of the first surface S1 and the second surface S2, for example, both of the first bus bars 21 are provided with the first spacer 211 on the first surface S1, the first surfaces S1 of the two first bus bars 21 overlap facing each other, the first spacer 211 of the first first bus bar 21 is located outside the edge of the second first bus bar 21, and the first spacer 211 of the second first bus bar 21 is located outside the edge of the first first bus bar 21, that is, the two first bus bars 21 overlap in a symmetrical form. At this time, there is no gap between the overlapping first bus bars 21, and the laminations of the first bus bars 21 may not be identified.

[0099] In an embodiment of the present application, a second spacer 212 is provided. When two first busbars 21 are overlapped in a symmetrical form, since the second spacer 212 and the first spacer 211 are located on the same surface of the first surface S1 and the second surface S2, the first spacer 211 and the second spacer 212 are spaced apart. The second spacer 212 can separate two adjacent first busbars 21, thereby realizing the phenomenon of identifying the stacking of the first busbars 21.

[0100] According to some embodiments of the present application, the second spacer 212 is located at an edge of the first busbar 21 .

[0101] In the embodiment of the present application, the second spacer 212 may be located at one of the first edge L1 and the second edge L2 , or the second spacer 212 may be located at both the first edge L1 and the second edge L2 .

[0102] In the embodiment of the present application, the second spacer 212 being located at the edge of the first busbar 21 can be understood as at least a portion of the edge of the second spacer 212 at least partially overlapping with the edge of the first busbar 21 .

[0103] In an embodiment of the present application, the middle area of ​​the first bus bar 21 is used to connect to the battery cell 10 to ensure the connection area between the first bus bar 21 and the battery cell 10, improve the firmness of the connection between the first bus bar 21 and the battery cell 10, and set the second spacer 212 at the edge of the first bus bar 21 to reduce the influence of the second spacer 212 on the firmness of the connection between the first bus bar 21 and the battery cell 10.

[0104] According to some embodiments of the present application, the second spacer 212 is located at the first edge L1 .

[0105] In the embodiment of the present application, the first edge L1 is the long side of the first busbar 21 .

[0106] The first edge L1 is longer, so there is more space for arranging the second spacer 212 , and the position of the second spacer 212 can be arranged more flexibly.

[0107] According to some embodiments of the present application, each of the two first edges L1 has at least one second spacer 212 .

[0108] Exemplarily, the two first edges L1 may be parallel to each other, or the two first edges L1 may be non-parallel.

[0109] Exemplarily, each of the two first edges L1 has a second spacer 212 .

[0110] A second spacer 212 is provided on both first edges L1, and at least one second spacer 212 is not on the same edge as the first spacer 211. When two first busbars 21 overlap in a symmetrical form, at least one second spacer 212 can separate the two adjacent first busbars 21, thereby realizing the phenomenon of identifying the stacking of the first busbars 21.

[0111] According to some embodiments of the present application, the second spacer 212 includes a protrusion, and / or the second spacer 212 includes a stamped portion formed by stamping.

[0112] Exemplarily, the second spacer 212 includes a protrusion; or the second spacer 212 includes a stamped portion formed by stamping; or the second spacer 212 includes a protrusion and the second spacer 212 includes a stamped portion formed by stamping.

[0113] In the embodiment of the present application, the protrusion may be integrally formed with the body of the first busbar 21 , or the protrusion may be connected to the body of the first busbar 21 by welding, bonding or other connection methods.

[0114] For example, in Figure 5 and Figure 6In the figure, the second surface S2 of the first busbar 21 protrudes toward the first surface S1, forming a protrusion. This can be understood as applying pressure to the second surface S2 by the stamping die, causing a portion of the first busbar 21 to protrude toward the first surface S1, forming a protrusion, while a portion of the second surface S2 corresponding to the protrusion forms a recess.

[0115] In other implementations, the first surface S1 of the first busbar 21 protrudes toward the second surface S2 to form a protrusion, that is, the second spacer 212 is located on the second surface S2.

[0116] In the embodiment of the present application, forming the second spacer 212 by providing a protrusion and / or a stamping portion is simple to operate and can simplify the overall production process.

[0117] According to some embodiments of the present application, the battery device 1001 includes at least two connection components 20 . Figure 8 A schematic structural diagram of another connection component provided in an embodiment of the present application. Figure 9 for Figure 8 The enlarged view of the part at B in the middle, see Figure 8 and Figure 9 The battery device 1001 further includes a connecting busbar 40. In any two adjacent connecting assemblies 20, one end of the connecting busbar 40 is connected to the first busbar 21 in one of the connecting assemblies 20, and the other end of the connecting busbar 40 is connected to the first busbar 21 in the other connecting assembly 20. The first surface S1 has a first spacer 211, and the second surface S2 is connected to the connecting busbar 40.

[0118] exist Figure 3 The battery device 1001 includes two connecting components 20. Figure 8 The battery device 1001 includes four connecting components 20. Figure 3 The connecting bus 40 is not shown.

[0119] In the embodiment of the present application, the number of first busbars 21 included in each connection assembly 20 may be equal or unequal. In the case where the connection assembly 20 includes at least two first busbars 21 , the connection busbar 40 may be connected to any one or more of the first busbars 21 .

[0120] The connecting busbar 40 connects the connecting components 20 , thereby connecting the multiple battery cell groups to each other, and the multiple battery cell groups are then connected in series, in parallel, or in mixed series to form a whole.

[0121] For example, the connecting busbar 40 and the first busbar 21 may be connected by welding.

[0122] The first surface S1 having the first spacer 211 can be understood as the convex surface of the first spacer 211 being located on the first surface S1 .

[0123] In the embodiment of the present application, the first surface S1 is connected to the battery cell 10 .

[0124] When the first busbar 21 is connected to the connecting busbar 40, the first busbar 21 needs to be connected to the battery cell 10 and the connecting busbar 40 at the same time. The thickness of the first busbar 21 is relatively thin, and the first busbar 21 has a first spacer 211, which can be identified in time when the first busbar 21 is stacked.

[0125] The thickness of the connecting busbar 40 is thinner than that of the battery cell 10 , making it more difficult to connect the first busbar 21 and the connecting busbar 40 . The second surface S2 of the first busbar 21 does not have the first spacer 211 , making it more convenient to connect the second surface S2 and the connecting busbar 40 .

[0126] In an embodiment of the present application, the first busbars 21 of two adjacent connecting components 20 are connected by a connecting busbar 40. The overall shape formed by the connecting component 20 is roughly rectangular, and the first busbar 21 can be set at at least one of the four corners of the rectangular connecting component.

[0127] For example, see Figure 8 The connection component 20 also includes a circuit board 23, and the first bus 21 and the second bus 22 located on the same side of the circuit board 23 are arranged at intervals along the first direction X. The first bus 21 can be located at the end of multiple first bus bars 21 and multiple second bus bars 22.

[0128] According to some embodiments of the present application, see Figure 3 and Figure 8 The battery device 1001 further includes a carrier sheet 50 , the connecting assembly 20 is connected to the carrier sheet 50 , and the carrier sheet 50 is located between the connecting assembly 20 and the battery cell 10 .

[0129] Exemplarily, the carrier sheet 50 may be an insulating film or an insulating sheet, and the material of the carrier sheet 50 may be PI (polyimide) or PE (polyethylene).

[0130] The carrier sheet 50 has a through hole, and the first bus bar 21 covers the through hole. A portion of the first bus bar 21 is connected to the battery cell 10 through the through hole, and another portion of the first bus bar 21 is bonded to the carrier sheet 50 .

[0131] The second busbar 22 can also be connected to the carrier plate 50 in the above-mentioned manner.

[0132] The circuit board 23 is bonded to the carrier sheet 50 , and the carrier sheet 50 separates the circuit board 23 and the battery cell 10 .

[0133] The carrier sheet 50 has excellent insulation properties and can effectively separate different electrodes, circuits, and other components, reducing the probability of short circuits and improving the stability of the battery device. The carrier sheet 50 allows the multiple connection components 20 to form a whole, facilitating the assembly of the connection components 20 with the battery cell group.

[0134] According to some embodiments of the present application, the carrier sheet 50 has a third edge L3 and a fourth edge L4 that are connected to and adjacent to each other, and the first bus bar 21 is located at least at one of the third edge L3 and the fourth edge L4.

[0135] In the embodiment of the present application, the first bus bar 21 may be located at the third edge L3; or the first bus bar 21 is located at the fourth edge L4; or the first bus bar 21 is located at the intersection of the third edge L3 and the fourth edge L4.

[0136] Exemplarily, the carrier sheet 50 may be a quadrilateral insulating film, and the first busbars 21 are located at corners of the insulating film.

[0137] For example, the first edge L1 is parallel to the third edge L3 , and the second edge L2 is parallel to the fourth edge L4 .

[0138] In the embodiment of the present application, the carrier sheet 50 has two opposing third edges L3 and two opposing fourth edges L4. The two third edges L3 are connected by two fourth edges L4, and the two fourth edges L4 are connected by two third edges L3. The carrier sheet 50 has two intersections of the third edges L3 and the fourth edges L4. The connection assembly 20 may include two first busbars 21, which are respectively located at the intersections of the two third edges L3 and the two fourth edges L4.

[0139] The first busbar 21 is located at the third edge L3 or the fourth edge L4 so that the first busbar 21 is located at the edge region of the carrier sheet 50 , facilitating connection between the first busbar 21 and the connecting busbar 40 .

[0140] According to some embodiments of the present application, the minimum thickness of the second busbar 22 is greater than the minimum thickness of the first busbar 21. Since both the first busbar 21 and the second busbar 22 are sheet-like structures, the minimum thickness of the second busbar 22 can be understood as the overall thickness of the second busbar 22, and the minimum thickness of the first busbar 21 can be understood as the thickness of the first busbar 21 after removing the first spacer 211 and the second spacer 212.

[0141] In an embodiment of the present application, the second bus 22 does not need to be connected to the connecting bus 40. The design space of the second bus 22 is relatively large, and the minimum thickness of the second bus 22 can be set to be relatively large, thereby reducing the risk of the second bus 22 being difficult to identify after lamination, and at the same time improving the current flow capacity of the second bus 22.

[0142] According to some embodiments of the present application, a minimum thickness of the first busbar 21 is greater than or equal to 0.1 millimeter (mm) and less than or equal to 0.5 mm.

[0143] Exemplarily, the minimum thickness of the first bus bar 21 may be equal to 0.1 mm; or the minimum thickness of the first bus bar 21 may be equal to 0.2 mm; or the minimum thickness of the first bus bar 21 may be equal to 0.3 mm; or the minimum thickness of the first bus bar 21 may be equal to 0.4 mm; or the minimum thickness of the first bus bar 21 may be equal to 0.5 mm.

[0144] If the minimum thickness of the first busbar 21 is too small, for example, less than 0.1 mm, the current carrying capacity of the first busbar 21 will be affected and the strength of the first busbar 21 will be reduced. If the minimum thickness of the first busbar 21 is too large, for example, greater than 0.5 mm, the first busbar 21 may be too large, affecting the energy density of the battery device 1001. Limiting the minimum thickness of the first busbar 21 to within the above range ensures the current carrying capacity of the first busbar 21 without significantly affecting the energy density of the battery device 1001.

[0145] In the embodiment of the present application, the minimum thickness of the second bus bar 22 is relatively large, and the minimum thickness of the second bus bar 22 is greater than or equal to 0.5 mm and less than or equal to 1 mm.

[0146] In an embodiment of the present application, the material of the first busbar 21 may include at least one of copper, aluminum, nickel, and silver. The material of the second busbar 22 may include at least one of copper, aluminum, nickel, and silver. The material of the first busbar 21 and the material of the second busbar 22 may be the same or different.

[0147] The battery device 1001 also includes a temperature detection component, which is used to detect the temperature of the battery cell 10. The temperature detection component and the connection component 20 are located on the same side of the battery cell 10. In the related art, the battery device 1001 also includes a fixed bracket, which is generally in the shape of a "J" shape, and the middle part of the fixed bracket and the two ends of the fixed bracket form two step structures. One end of the fixed bracket is clamped between a bus bar and a battery cell 10, and the other end of the fixed bracket is clamped between another bus bar and a battery cell 10. The temperature detection component is clamped between the middle part of the fixed bracket and the battery cell 10 to fix the temperature detection component. The bus bar used to clamp the fixed bracket can only extend to the step structure toward one end of the fixed bracket, which limits the volume of the bus bar and thus affects the current carrying capacity of the bus bar.

[0148] Figure 10 for Figure 3 A partial enlarged view of point C in the middle. Figure 11 for Figure 3 The exploded view of the enlarged view of the part at C in the middle is from another perspective. Figure 10 and Figure 11 According to some embodiments of the present application, the second busbar 22 includes a main portion 221 and an extension portion 222. The extension portion 222 is integrally connected to the main portion 221, and the main portion 221 is connected to the battery cell 10. The battery device 1001 also includes a temperature detection component 60. The temperature detection component 60 is located between the battery cell 10 and the extension portion 222. The extension portion 222 is used to make the temperature detection component 60 contact the battery cell 10. The temperature detection component 60 is configured to detect the temperature of the battery cell 10.

[0149] In the embodiment of the present application, the extension portion 222 is integrally connected to the main body portion 221 , that is, the extension portion 222 and the main body portion 221 are made of the same material, and the extension portion 222 can also be used for electrical connection.

[0150] Exemplarily, the main body 221 is welded to the battery cell 10 . The main body 221 is welded to the terminal of the battery cell 10 .

[0151] In an embodiment of the present application, before the temperature detection component 60 is set, along the height direction Z of the battery cell 10, the distance between the extension portion 222 and the battery cell 10 is less than the thickness of the temperature detection component 60, and the temperature detection component 60 is located between the extension portion 222 and the battery cell 10. The extension portion 222 provides pressure on the temperature detection component 60 toward the battery cell 10, so that the temperature detection component 60 can contact the battery cell 10, and the temperature of the battery cell 10 detected by the temperature detection component 60 is more accurate, that is, the temperature detection component 60 is sandwiched between the battery cell 10 and the extension portion 222, and the extension portion 222 fixes the temperature detection component 60.

[0152] In the embodiment of the present application, the height direction Z of the battery cell 10 is the arrangement direction of the battery cell 10 and the connection assembly 20 .

[0153] In an embodiment of the present application, the extension portion 222 can be bent toward the battery cell 10, or the extension portion 222 can be bent toward the side away from the battery cell 10, or the extension portion 222 can be not bent. The shape of the extension portion 222 is adjusted according to the distance between the battery cell 10 and the extension portion 222 and the thickness of the temperature detection component 60 so that the temperature detection component 60 can contact the battery cell 10.

[0154] In an embodiment of the present application, the second bus 22 is provided with an extension portion 222, which can fix the temperature detection component 60. The extension portion 222 extends from the main body 221 to the area where the original fixed bracket is located. At the same time, the extension portion 222 is integrally connected to the main body 221. The extension portion 222 can also be used for electrical connection. The extension portion 222 increases the overall volume of the second bus 22 and improves the current flow capacity of the second bus 22.

[0155] The battery assembly 1001 has limited space. In the related art, a fixed bracket is used to secure the temperature detection assembly 60. To avoid excessive space occupation, the fixed bracket typically needs to be customized, resulting in high costs. In the embodiment of the present application, the original second busbar 22 is extended to form an extension 222. The extension 222 can secure the temperature detection assembly 60, eliminating the expense of customizing the fixed bracket and saving costs.

[0156] In the related art, the extension portion 222 needs to be cut. In the embodiment of the present application, the originally cut portion is retained to form the extension portion 222, and the raw materials originally used to make the second bus 22 are also reserved in surplus, so the added extension portion 222 does not affect the cost of making the second bus 22.

[0157] See also Figure 10 and Figure 11 The second bus 22 also includes a first bending portion 223, which connects the main body 221 and the extension portion 222. The first bending portion 223 is bent toward a side away from the battery cell 10 so that there is a gap between the extension portion 222 and the battery cell 10, and the temperature detection component 60 is located in the gap.

[0158] In an embodiment of the present application, the temperature detection component 60 has a certain thickness, and the first bending portion 223 is provided so that the main body 221 and the extension portion 222 have a height difference. The distance between the extension portion 222 and the battery cell 10 is greater than the distance between the main body 221 and the battery cell 10, which facilitates the arrangement of the temperature detection component 60.

[0159] See also Figure 10 and Figure 11 The main body 221 includes a first main body 2211 and a second main body 2212 arranged along the first direction X, and the first main body 2211 and the second main body 2212 are respectively connected to different battery cells 10; the extension part 222 is integrally formed with the first main body 2211, and the first bending part 223 is integrally connected between the first main body 2211 and the extension part 222.

[0160] In the embodiment of the present application, the first main body 2211 and the second main body 2212 are connected to different battery cells 10 , that is, different battery cells 10 can be connected in series or in parallel through the second busbar 22 .

[0161] In the examples of this application, see Figure 10 and Figure 11 The main body 221 further includes a second bending portion 2213 . The first main body 2211 , the second bending portion 2213 , and the second main body 2212 are arranged in the first direction X. The second bending portion 2213 connects the first main body 2211 and the second main body 2212 .

[0162] As battery device 1001 is used, battery cells 10 may expand or contract. This expansion or contraction may pull on first body 2211 and second body 2212, potentially causing failure of the connection between first body 2211 or second body 2212 and battery cell 10. In the embodiment of the present application, second bent portion 2213 connects first body 2211 and second body 2212. When first body 2211 or second body 2212 is pulled, second bent portion 2213 deforms to alleviate stress generated by expansion of battery cell 10, reducing the likelihood of damage to the connection due to stress concentration, and improving the stability and reliability of battery device 1001.

[0163] In the embodiment of the present application, the first bent portion 223 is connected to the first body 2211 in an arc shape, and the first bent portion 223 is connected to the extension portion 222 in an arc shape. The arc connection makes the transition between the first bent portion 223 and the first body 2211 and the transition between the first bent portion 223 and the extension portion 222 smoother, thereby reducing stress concentration caused by the curved connection and improving the structural strength of the second busbar 22.

[0164] At the same time, the arc-shaped connection has no sharp corners, which reduces the risk of injury to workers when taking the second bus bar 22 .

[0165] In the embodiment of the present application, the first body 2211, the first bent portion 223 and the extension portion 222 can be integrally stamped. In the stamping process, the arc-shaped connection is easier to demould, reducing mold wear.

[0166] See also Figure 10 and Figure 11 The first body 2211, the first bent portion 223, and the extension portion 222 are arranged sequentially along the second direction Y. Along the first direction X, the end of the first body 2211 proximate to the second body 2212 extends beyond the end of the first bent portion 223 proximate to the second body 2212. Both the first direction X and the second direction Y intersect with the height direction Z of the battery cell 10. The first direction X and the second direction Y intersect, and the first direction X and the second direction Y are located in the same plane.

[0167] In the embodiment of the present application, a surface of the first body 2211 away from the battery cell and a surface of the second body 2212 away from the battery cell are in the same plane, and both the first direction X and the second direction Y are located in the plane.

[0168] In an embodiment of the present application, along the first direction X, the minimum distance between the first body 2211 and the second body 2212 is greater than the minimum distance between the first bending portion 223 and the second body 2212, so that the end of the first body 2211 close to the second body 2212 extends outside the end of the first bending portion 223 close to the second body 2212.

[0169] Exemplarily, along the first direction X, a difference between a minimum distance between the first body 2211 and the second body 2212 and a minimum distance between the first bending portion 223 and the second body 2212 is greater than or equal to 3 mm.

[0170] In the embodiment of the present application, the above-mentioned arrangement can make one end of the first bending portion 223 shorter than one end of the first main body 2211, thereby reducing the interference of the first bending portion 223 at the connection between the first main body 2211 and the second main body 2212, and making the integral stamping operation of the first main body 2211, the first bending portion 223 and the extension portion 222 simpler.

[0171] In some embodiments of the present application, along the first direction X, one end of the first body 2211 away from the second body 2212 extends out of one end of the first bending portion 223 away from the second body 2212 .

[0172] In some other embodiments of the present application, along the first direction X, an end of the first bent portion 223 away from the second body 2212 extends out of an end of the first body 2211 away from the second body 2212 .

[0173] In other embodiments of the present application, see Figure 10 and Figure 11 Along the first direction X, one end of the first body 2211 away from the second body 2212 is flush with one end of the first bending portion 223 away from the second body 2212 .

[0174] The second busbar 22 is generally manufactured by cutting first and then stamping. The end of the first body 2211 away from the second body 2212 is flush with the end of the first bent portion 223 away from the second body 2212, which facilitates processing.

[0175] In some embodiments of the present application, along the first direction X, one end of the extension portion 222 away from the second body 2212 extends out of one end of the first bending portion 223 away from the second body 2212 .

[0176] In other embodiments of the present application, see Figure 10 and Figure 11 Along the first direction X, the end of the extension portion 222 away from the second body 2212 is flush with the end of the first bending portion 223 away from the second body 2212, which is convenient for processing; the end of the extension portion 222 close to the second body 2212 extends out of the end of the first bending portion 223 close to the first body 2211, so that the extension portion 222 can be set longer, better press the temperature detection component 60, and also facilitate the subsequent arrangement of other components on the extension portion 222.

[0177] See also Figure 3 、 Figure 8 and Figure 11 The circuit board 23 is connected to the main body 221. The temperature detection assembly 60 includes a thermal pad 61, a temperature detection sensor 62, and a reinforcement plate 63. The thermal pad 61 is connected to the battery cell 10. The temperature detection sensor 62 is located between the thermal pad 61 and the extension 222. The temperature detection sensor 62 is connected to the circuit board 23. The circuit board 23 is connected to the thermal pad 61. The reinforcement plate 63 is located between the thermal pad 61 and the extension 222.

[0178] Figure 12 This is a structural diagram of a reinforcement plate provided in an embodiment of the present application. Figure 12 The reinforcing plate 63 has a mounting hole 631. The angle between the penetration direction of the mounting hole 631 and the height direction of the battery cell 10 is less than 90 degrees. The temperature detection sensor 62 is located in the mounting hole 631. The orthographic projection of the reinforcing plate 63 on the first plane is located within the orthographic projection of the extension portion 222 on the first plane. The first plane is perpendicular to the height direction Z of the battery cell 10.

[0179] Exemplarily, the penetrating direction of the mounting hole 631 is parallel to the height direction of the battery cell 10 .

[0180] In the same connection assembly 20, the first busbar 21 and the second busbar 22 are both connected to the circuit board 23. The first busbar 21 and the second busbar 22 are electrically connected via the circuit board 23, thereby realizing series or parallel connection of the battery cells 10.

[0181] See also Figure 3 and Figure 8 The circuit board 23 extends along the first direction X. The first busbars 21 and the second busbars 22 are located on at least one side of the circuit board 23 along the second direction Y. The first busbars 21 or the second busbars 22 are located on opposite sides of the circuit board 23 along the second direction Y. The first busbars 21 or the second busbars 22 located on the same side of the circuit board 23 are arranged at intervals along the first direction X. The first busbars 21 and the second busbars 22 are both connected to the side edges of the circuit board 23.

[0182] See also Figure 4 and Figure 9 The connection component 20 further includes a nickel sheet 24 , and the first busbar 21 and the second busbar 22 are both connected to the circuit board 23 via the nickel sheet 24 .

[0183] For example, the circuit board 23 may be an FPC (Flexible Printed Circuit) or a PCB (Printed Circuit Board). The circuit board 23 is connected to a battery management system (BMS), which can collect data of the battery cells 10 in real time.

[0184] In the embodiment of the present application, the thermal pad 61 is mainly used to conduct heat. It is sandwiched between the temperature detection sensor 62 and the battery cell 10, and can transfer the heat generated by the battery cell 10 to the temperature detection sensor 62, so that the temperature detection sensor 62 can more accurately collect the actual temperature of the battery cell 10, reducing the delay and error of temperature detection. The volume of the temperature detection sensor 62 is relatively small, and the volume of the thermal pad 61 is larger than that of the temperature detection sensor 62. The area that can sense the temperature is larger, making the detected temperature more accurate. At the same time, the thermal pad 61 has a certain degree of elasticity and can fill the gap between the temperature detection sensor 62 and the surface of the battery cell 10 to ensure good thermal contact. It can also buffer the vibration and impact generated by the battery cell 10 during operation to a certain extent.

[0185] The temperature sensor 62, typically a component such as an NTC (Negative Temperature Coefficient) thermistor, monitors the temperature of the battery cell 10 in real time. By sensing temperature changes, it converts the temperature signal into an electrical signal, which is then transmitted to the battery management system via the circuit board 23. Based on this temperature data, the BMS can promptly detect abnormal conditions such as overheating or overcooling of the battery cell 10 and take appropriate measures, such as adjusting the charge and discharge strategy and activating cooling or heating devices, to ensure that the battery unit 1001 operates within the appropriate temperature range, minimizing the possibility of temperature anomalies affecting the performance and lifespan of the battery unit 1001.

[0186] The reinforcing plate 63 is mainly used to enhance the overall structural strength and stability of the temperature detection component 60, and to reduce the possibility of warping or deformation of the temperature detection component 60 during transportation or assembly. A mounting hole 631 is provided on the reinforcing plate 63, and the temperature detection sensor 62 is placed in the mounting hole 631. The reinforcing plate 63 can also provide a certain degree of protection for the temperature detection sensor 62, making it less susceptible to damage when subjected to external force impact. It also helps to fix the temperature detection sensor 62, thereby improving the accuracy and reliability of temperature detection. The reinforcing plate 63 can completely cover the thermal pad 61, so that the reinforcing plate 63 can protect the thermal pad 61.

[0187] The orthographic projection of the reinforcing plate 63 on the first plane is located within the orthographic projection of the extension part 222 on the first plane, so that the extension part 222 can completely press the reinforcing plate 63, improve the fixing effect of the temperature detection component 60, reduce the probability of the temperature detection component 60 shaking, and improve the accuracy of the temperature detection results.

[0188] See also Figure 10 and Figure 11 The extension portion 222 has a first observation hole 2221 , and the orthographic projection of the first observation hole 2221 on the first plane at least partially overlaps with the orthographic projection of the mounting hole 631 on the first plane.

[0189] In an embodiment of the present application, when installing the temperature detection component 60, the temperature detection component 60 cannot be directly seen because it is covered by the extension portion 222. A first observation hole 2221 is provided on the extension portion 222, and the temperature detection sensor 62 can be observed through the first observation hole 2221, thereby reducing the probability of the temperature detection sensor 62 being missing.

[0190] See also Figure 11The temperature detection component 60 also includes a transparent cover 64, which covers the opening on the side of the mounting hole 631 away from the thermal pad 61. The transparent cover 64 ensures that the temperature detection sensor 62 can be observed through the first observation hole 2221, and at the same time can fix the temperature detection sensor 62 in the mounting hole 631 to protect the temperature detection sensor 62.

[0191] In the embodiment of the present application, the extension portion 222 has a second observation hole 2222, the orthographic projection of the second observation hole 2222 on the first plane at least partially overlapping with the orthographic projection of the thermal pad 61 on the first plane. The reinforcement plate 63 has a third observation hole 632, which communicates with the second observation hole 2222 in the height direction Z of the battery cell 10. The thermal pad 61 can be observed through the second observation hole 2222 and the third observation hole 632, reducing the probability of missing the thermal pad 61.

[0192] See also Figure 10 and Figure 11 The first observation hole 2221 and the second observation hole 2222 are connected. In other implementations, the first observation hole 2221 and the second observation hole 2222 may not be connected.

[0193] See also Figure 10 and Figure 11 The reinforcement plate 63 also has a positioning hole 633, which is configured to cooperate with the positioning pin on the installation tool to position the reinforcement plate 63; the extension part 222 has an avoidance hole 2223 corresponding to the positioning hole 633, and the avoidance hole 2223 is configured to cooperate with the avoidance positioning pin.

[0194] When installing the temperature detection assembly 60 and the connection assembly 20, the temperature detection assembly 60 is generally first secured to the installation fixture. The installation fixture has a positioning pin. Positioning holes 633 are provided on the reinforcement plate 63 to cooperate with the positioning pin to position the reinforcement plate 63 for subsequent installation. At the same time, because the extension 222 needs to press against the reinforcement plate 63, a clearance hole 2223 is provided in the extension 222. The clearance hole 2223 avoids the positioning pin, preventing the positioning pin from interfering with the extension 222 pressing against the reinforcement plate 63.

[0195] After the installation is completed, the installation tooling will be removed and will not affect the subsequent processes.

[0196] In an embodiment of the present application, the whole formed by the connection component 20, the connection bus 40, the carrier sheet 50 and the temperature detection component 60 can be called CCS (Cell Contacting System). The CCS can realize the series and parallel connection of the battery cells 10, as well as sample the temperature and voltage of the battery cells 10, and provide the relevant data to the BMS system to manage and control the battery device 1001.

[0197] In the embodiment of the present application, the CCS may further include a total positive bus 25 and a total negative bus 26, which are used to connect the battery device 1001 to the external circuit. The total positive bus 25 and the total negative bus 26 may be located in any one of the connection components 20. Figure 3 Only part of the connection components 20 in the CCS are shown, so Figure 3 Only the total positive busbar 25 is shown.

[0198] An embodiment of the present application provides an electrical device, which includes the battery device 1001 of any one of the above embodiments, and the battery device 1001 is used to provide electrical energy.

[0199] An embodiment of the present application further provides an energy storage device, which includes the battery device 1001 of any one of the above embodiments, and the battery device 1001 is used to store electrical energy.

[0200] An embodiment of the present application provides a battery device 1001 , which includes a battery cell 10 , a connection assembly 20 , and a connection busbar 40 .

[0201] The connecting assembly 20 includes a first busbar 21, which has a first surface S1 and a second surface S2 opposite to each other in the thickness direction. The first busbar 21 includes a first spacer 211 and a second spacer 212. The first spacer 211 and the second spacer 212 are both located on the first surface S1. The first spacer 211 and the second spacer 212 are spaced apart. The first surface S1 is connected to the battery cell 10. The first spacer 211 is configured to separate two adjacent first busbars 21.

[0202] The first busbar 21 has a first edge L1 and a second edge L2 that are connected and adjacent to each other.

[0203] The first spacer 211 includes a folded portion 2111, which is a protruding structure formed by folding a portion of the first bus bar 21 toward the first surface S1. The folding line of the folded portion 2111 intersects both the first edge L1 and the second edge L2.

[0204] The second spacer 212 includes a punched portion formed by punching, and the punched portion is located at the first edge L1. Each first edge L1 has at least one punched portion.

[0205] In any two adjacent connection components 20 , one end of the connection bus 40 is connected to the first bus 21 in one of the connection components 20 , the other end of the connection bus 40 is connected to the first bus 21 in the other connection component 20 , and the second surface S2 is connected to the connection bus 40 .

[0206] Some other embodiments of the present application provide a battery device 1001 , which includes a battery cell 10 , a connection assembly 20 , and a temperature detection assembly 60 . The connection assembly 20 includes a second busbar 22 .

[0207] The second busbar 22 includes a main portion 221, an extension portion 222, and a first bent portion 223. The first bent portion 223 integrally connects the main portion 221 and the extension portion 222. The main portion 221 is connected to the battery cell 10. The first bent portion 223 bends away from the battery cell 10 to create a gap between the extension portion 222 and the battery cell 10. The temperature detection assembly 60 is located within the gap. The extension portion 222 is used to allow the temperature detection assembly 60 to contact the battery cell 10. The temperature detection assembly 60 is configured to detect the temperature of the battery cell 10.

[0208] The main body 221 includes a first main body 2211, a second bent portion 2213, and a second main body 2212 arranged along the first direction X. The second bent portion 2213 connects the first and second main bodies 2211, 2212. The first and second main bodies 2211, 2212 are respectively connected to different battery cells 10. The extension 222 is integrally formed with the first main body 2211, and the first bent portion 223 is integrally connected between the first main body 2211 and the extension 222. The first bent portion 223 is connected to the first main body 2211 in an arc shape, and the first bent portion 223 is connected to the extension 222 in an arc shape.

[0209] The first body 2211, the first bent portion 223, and the extension portion 222 are arranged sequentially along the second direction Y. Along the first direction X, the end of the first body 2211 proximal to the second body 2212 extends beyond the end of the first bent portion 223 proximal to the second body 2212. Along the first direction X, the minimum distance between the first body 2211 and the second body 2212 is greater than the minimum distance between the first bent portion 223 and the second body 2212, such that the end of the first body 2211 proximal to the second body 2212 extends beyond the end of the first bent portion 223 proximal to the second body 2212. Along the first direction X, the end of the first body 2211 distal to the second body 2212 is flush with the end of the first bent portion 223 distal to the second body 2212. Along the first direction X, the end of the extension portion 222 away from the second body 2212 is flush with the end of the first bent portion 223 away from the second body 2212; the end of the extension portion 222 closer to the second body 2212 extends beyond the end of the first bent portion 223 closer to the first body 2211. The temperature detection assembly 60 includes a thermal pad 61, a temperature detection sensor 62, a reinforcement plate 63, and a transparent cover 64. The thermal pad 61 is connected to the battery cell 10, the temperature detection sensor 62 is located between the thermal pad 61 and the extension portion 222, the temperature detection sensor 62 is connected to the circuit board 23, and the circuit board 23 is connected to the thermal pad 61. The reinforcement plate 63 is located between the thermal pad 61 and the extension portion 222, and the transparent cover 64 covers the opening of the mounting hole 631 on the side away from the thermal pad 61.

[0210] The extension portion 222 has a first observation hole 2221 and a second observation hole 2222. The orthographic projection of the first observation hole 2221 on the first plane at least partially overlaps with the orthographic projection of the mounting hole 631 on the first plane. The orthographic projection of the second observation hole 2222 on the first plane at least partially overlaps with the orthographic projection of the thermal pad 61 on the first plane. The reinforcement plate 63 has a third observation hole 632, which communicates with the second observation hole 2222 in the height direction Z of the battery cell 10.

[0211] The reinforcement plate 63 also has a positioning hole 633, which is configured to cooperate with the positioning pin on the installation tool to position the reinforcement plate 63; the extension part 222 has an avoidance hole 2223 corresponding to the positioning hole 633, and the avoidance hole 2223 is configured to cooperate with the avoidance positioning pin.

[0212] Other embodiments of the present application provide a battery device 1001, comprising a battery cell 10, a connection assembly 20, a connection bus 40, a carrier sheet 50, and a temperature detection assembly 60. The connection assembly 20 is connected to the carrier sheet 50, which is located between the connection assembly 20 and the battery cell 10.

[0213] The connection assembly 20 includes a first busbar 21, a second busbar 22, and a circuit board 23. The circuit board 23 extends along a first direction X. The first busbar 21 and the second busbar 22 are located on at least one side of the circuit board 23 along a second direction Y. The circuit board 23 also has a first busbar 21 or a second busbar 22 on opposite sides of the circuit board 23 along the second direction Y. The first busbars 21 and the second busbars 22 located on the same side of the circuit board 23 are spaced apart along the first direction X. Both the first busbars 21 and the second busbars 22 are connected to the side edges of the circuit board 23. The first busbar 21 is located at the end of the plurality of first busbars 21 and the plurality of second busbars 22.

[0214] The first busbar 21 has a first surface S1 and a second surface S2 opposite to each other along the thickness direction. The first busbar 21 includes a first spacer 211 and a second spacer 212. The first spacer 211 and the second spacer 212 are both located on the first surface S1. The first spacer 211 and the second spacer 212 are spaced apart. The first surface S1 is connected to the battery cell 10. The first spacer 211 is configured to separate two adjacent first busbars 21.

[0215] The first busbar 21 has a first edge L1 and a second edge L2 that are connected and adjacent to each other.

[0216] The first spacer 211 includes a folded portion 2111, which is a protruding structure formed by folding a portion of the first bus bar 21 toward the first surface S1. The folding line of the folded portion 2111 intersects both the first edge L1 and the second edge L2.

[0217] The second spacer 212 includes a punched portion formed by punching, and the punched portion is located at the first edge L1. Each first edge L1 has at least one punched portion.

[0218] In any two adjacent connection components 20 , one end of the connection bus 40 is connected to the first bus 21 in one of the connection components 20 , the other end of the connection bus 40 is connected to the first bus 21 in the other connection component 20 , and the second surface S2 is connected to the connection bus 40 .

[0219] The second busbar 22 includes a main portion 221, an extension portion 222, and a first bent portion 223. The first bent portion 223 integrally connects the main portion 221 and the extension portion 222. The main portion 221 is connected to the battery cell 10. The first bent portion 223 bends away from the battery cell 10 to create a gap between the extension portion 222 and the battery cell 10. The temperature detection assembly 60 is located within the gap. The extension portion 222 is used to allow the temperature detection assembly 60 to contact the battery cell 10. The temperature detection assembly 60 is configured to detect the temperature of the battery cell 10.

[0220] The main body 221 includes a first main body 2211, a second bent portion 2213, and a second main body 2212 arranged along the first direction X. The second bent portion 2213 connects the first and second main bodies 2211, 2212. The first and second main bodies 2211, 2212 are respectively connected to different battery cells 10. The extension 222 is integrally formed with the first main body 2211, and the first bent portion 223 is integrally connected between the first main body 2211 and the extension 222. The first bent portion 223 is connected to the first main body 2211 in an arc shape, and the first bent portion 223 is connected to the extension 222 in an arc shape.

[0221] The first body 2211, the first bent portion 223, and the extension portion 222 are arranged sequentially along the second direction Y. Along the first direction X, the end of the first body 2211 proximal to the second body 2212 extends beyond the end of the first bent portion 223 proximal to the second body 2212. Along the first direction X, the minimum distance between the first body 2211 and the second body 2212 is greater than the minimum distance between the first bent portion 223 and the second body 2212, such that the end of the first body 2211 proximal to the second body 2212 extends beyond the end of the first bent portion 223 proximal to the second body 2212. Along the first direction X, the end of the first body 2211 distal to the second body 2212 is flush with the end of the first bent portion 223 distal to the second body 2212. Along the first direction X, the end of the extension portion 222 away from the second body 2212 is flush with the end of the first bent portion 223 away from the second body 2212; the end of the extension portion 222 closer to the second body 2212 extends beyond the end of the first bent portion 223 closer to the first body 2211. The temperature detection assembly 60 includes a thermal pad 61, a temperature detection sensor 62, a reinforcement plate 63, and a transparent cover 64. The thermal pad 61 is connected to the battery cell 10, the temperature detection sensor 62 is located between the thermal pad 61 and the extension portion 222, the temperature detection sensor 62 is connected to the circuit board 23, and the circuit board 23 is connected to the thermal pad 61. The reinforcement plate 63 is located between the thermal pad 61 and the extension portion 222, and the transparent cover 64 covers the opening of the mounting hole 631 on the side away from the thermal pad 61.

[0222] The extension portion 222 has a first observation hole 2221 and a second observation hole 2222. The orthographic projection of the first observation hole 2221 on the first plane at least partially overlaps with the orthographic projection of the mounting hole 631 on the first plane. The orthographic projection of the second observation hole 2222 on the first plane at least partially overlaps with the orthographic projection of the thermal pad 61 on the first plane. The reinforcement plate 63 has a third observation hole 632, which communicates with the second observation hole 2222 in the height direction Z of the battery cell 10.

[0223] The reinforcement plate 63 also has a positioning hole 633, which is configured to cooperate with the positioning pin on the installation tool to position the reinforcement plate 63; the extension part 222 has an avoidance hole 2223 corresponding to the positioning hole 633, and the avoidance hole 2223 is configured to cooperate with the avoidance positioning pin.

[0224] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: The battery device comprises: Battery cells; A connecting assembly includes a first busbar, which is connected to the battery cell. The first busbar has a first surface and a second surface opposite to each other along the thickness direction. The first busbar includes a first spacer, which is located on at least one of the first surface and the second surface. The first spacer is configured to separate two adjacent first busbars. The first spacer is a protruding structure located on at least one of the first surface and the second surface. The first spacer is located at the edge of the first busbar.

2. The battery device according to claim 1, wherein: The first spacer includes a folded portion, which is a protruding structure formed by folding a portion of the first busbar toward at least one of the first surface and the second surface.

3. The battery device according to claim 2, characterized in that The first busbar has a first edge and a second edge that are connected to and adjacent to each other, and a folding line of the folded portion intersects both the first edge and the second edge.

4. The battery device according to claim 1, wherein: The first spacer includes a thickened portion, which is a protruding structure located on at least one of the first surface and the second surface.

5. The battery device according to claim 4, characterized in that The first busbar has a first edge and a second edge connected to each other and adjacent to each other; The thickened portion is located at the intersection of the first edge and the second edge, and / or, The length of the first edge is greater than that of the second edge, and the thickened portion is located at the first edge.

6. The battery device according to any one of claims 1 to 5, characterized in that The first busbar further includes a second spacer. The second spacer and the first spacer are located on the same surface of the first surface and the second surface. The first spacer and the second spacer are spaced apart.

7. The battery device according to claim 6, characterized in that The second spacer is located at an edge of the first busbar.

8. The battery device according to claim 7, characterized in that In a case where the first busbar has a first edge and a second edge connected and adjacent to each other, the length of the first edge is greater than the length of the second edge, and the second spacer is located at the first edge.

9. The battery device according to claim 8, characterized in that The first busbar has two first edges connected by the second edge, and each of the two first edges has at least one second spacer.

10. The battery device according to claim 6, wherein: The second spacer includes a protrusion, and / or the second spacer includes a stamped portion formed by stamping.

11. The battery device according to any one of claims 1 to 5, characterized in that The battery device includes at least two connecting components, and the battery device also includes: a connecting busbar, wherein in any two adjacent connecting assemblies, one end of the connecting busbar is connected to the first busbar in one of the connecting assemblies, and the other end of the connecting busbar is connected to the first busbar in the other connecting assembly; The first surface has the first spacer, and the second surface is connected to the connecting busbar.

12. An electrical device, characterized in that: The electrical device comprises the battery device according to any one of claims 1 to 11, and the battery device is used to provide electrical energy.

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