Battery device and electric device

Abstract

The application discloses a battery device and a power utilization device. The battery device comprises at least one battery cell assembly, at least one sampling transmission piece, and at least one sampling transmission piece. The battery cell assembly comprises a first battery cell and a second battery cell arranged along a first direction. The sampling transmission piece extends along the first direction and comprises at least one sampling transmission piece first sub-piece and at least one sampling transmission piece second sub-piece. The sampling transmission piece first sub-piece and the sampling transmission piece second sub-piece are arranged along the first direction. The sampling transmission piece first sub-piece is electrically connected to the first battery cell, and the sampling transmission piece second sub-piece is electrically connected to the second battery cell. The sampling transmission piece first sub-piece has a first overlapping section on a side close to the sampling transmission piece second sub-piece along the first direction. The sampling transmission piece second sub-piece has a second overlapping section on a side close to the sampling transmission piece first sub-piece along the first direction. Along a second direction, the first overlapping section and the second overlapping section overlap and are electrically connected to each other. The space utilization of the battery device is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to battery devices and power-consuming devices. Background Technology

[0002] The application of new energy batteries in daily life and industry is becoming increasingly widespread. For example, new energy vehicles equipped with batteries are already widely used, and battery devices are also increasingly being applied in energy storage. In new energy vehicles equipped with batteries, the battery device can provide all or part of the power. In the field of energy storage, battery devices can be installed in energy storage boxes or directly on the user side.

[0003] In related technologies, battery devices typically include battery cell modules, a sampling module, and a battery management system. The sampling module collects physical parameters such as temperature, voltage, and current of the battery cell modules. The battery management system uses these collected physical parameters to monitor and manage the operating status of each battery cell, ensuring the battery device operates in an optimal state and has a longer lifespan. Since the sampling module occupies internal space in the battery device, optimizing the structure of the sampling module to improve the space utilization of the battery device is one of the research issues in the industry. Utility Model Content

[0004] To address the aforementioned technical problems, embodiments of this application provide a battery device and an electrical device to improve the space utilization of the battery device by optimizing the structure of the sampling module.

[0005] A first aspect of this application provides a battery device, comprising: at least one battery cell assembly including a plurality of first battery cells and a plurality of second battery cells arranged along a first direction; at least one sampling transmission member extending along the first direction, the sampling transmission member including at least one first sampling transmission member sub-component and at least one second sampling transmission member sub-component, the first sampling transmission member sub-component and the second sampling transmission member sub-component being arranged along the first direction, the first sampling transmission member sub-component being electrically connected to the first battery cells, and the second sampling transmission member sub-component being electrically connected to the second battery cells; the first sampling transmission member sub-component having a first overlapping section on the side of the sampling transmission member sub-component closer to the second sampling transmission member sub-component along the first direction, the second sampling transmission member sub-component having a second overlapping section on the side of the sampling transmission member sub-component closer to the first sampling transmission member sub-component along the first direction, the first overlapping section and the second overlapping section overlapping each other and being electrically connected along a second direction, the second direction intersecting the first direction.

[0006] Since the first sub-component of the sampling transmission component is electrically connected to the first battery cell and the second sub-component of the sampling transmission component is electrically connected to the second battery cell, the first and second sub-components of the sampling transmission component can respectively collect at least one of the physical parameters such as temperature, voltage, and current of the first and second battery cells. Thus, the battery cells can be monitored and managed based on the collected physical parameters, so that the battery cell assembly can work normally, which is beneficial to extending the service life of the battery device and reducing the probability of thermal runaway of the battery cells. Since the first overlapping section and the second overlapping section overlap and are electrically connected to each other, the first sub-component and the second sub-component of the sampling transmission component can form a sampling transmission component with a relatively long length along the first direction, which can overcome the length limitation of the sampling transmission component. For example, when the length of the battery cell assembly along the first direction is relatively long, the signal of the battery cell exceeds the line range that a single-sided sampling board can carry, so a double-sided sampling board is required. However, due to the material of the sampling board itself, manufacturing difficulty, etc., the length of the sampling transmission component along the first direction is limited. However, in the embodiments of this application, the first sub-component and the second sub-component of the sampling transmission component overlap along the first direction, which can not only overcome the length limitation of the sampling transmission component, but also share some electrical components. Therefore, the overlapping sampling transmission component can be applied to battery cell assemblies with a relatively long length along the first direction, and it is also beneficial to reduce the number of parts in the battery device and simplify the wiring harness or layout design inside the battery device, thereby improving the space utilization of the battery device.

[0007] In some embodiments, the sampling transmission component includes a sampling terminal and a line integration component connected to the sampling terminal. The line integration component includes an integration component body and electrical wiring. A first sub-component of the sampling transmission component includes a first sub-component of the sampling terminal and a first sub-component of the line integration component. The first sub-component of the line integration component includes a first sub-component body and a first electrical wiring. The first electrical wiring is located on opposite sides of the first sub-component body along a second direction. The first electrical wiring includes a first communication line and a first power supply line. The first sub-component of the sampling terminal is electrically connected to a first battery cell and the first communication line. A second sub-component of the sampling transmission component includes a second sub-component of the sampling terminal and a second sub-component of the line integration component. The second sub-component of the line integration component includes a second sub-component body and a second electrical wiring. The second electrical wiring is located on opposite sides of the second sub-component body along a second direction. The second electrical wiring includes a second communication line and a second power supply line. The second sub-component of the sampling terminal is electrically connected to a second battery cell and the second communication line. A portion of the first power supply line located at a first overlap section is electrically connected to a portion of the second power supply line located at a second overlap section.

[0008] The integrated component has electrical wiring on both opposite sides of its main body. Compared to a component with electrical wiring on only one side, this allows for more electrical wiring to be arranged without increasing the overall size of the component. Therefore, it enables sampling of more individual battery cells or the collection of more physical parameters without increasing the number of components. Furthermore, since the first and second power supply lines are electrically connected, the first and second sub-components of the sampling transmission unit can share a power supply module, reducing the number of power supply modules required in the battery device. Additionally, because the two power supply lines are electrically connected at the overlap between the first and second overlap sections, there is no need for additional wiring harnesses or connectors to connect the power supply lines, simplifying the wiring.

[0009] In some embodiments, the battery cell assembly and the sampling transmission element are arranged along a second direction, and the first power supply line is welded to the second power supply line.

[0010] Because the two power supply lines are welded together, the wiring harness, connectors, etc. used to electrically connect the two power supply lines are saved, which can save the space occupied by the components and reduce the overall size of the sampling transmission component first sub-component and the sampling transmission component second sub-component along the first and second directions, thereby improving the space utilization of the battery device.

[0011] In some embodiments, a welded portion is formed between the first overlapping section and the second overlapping section along a second direction, the welded portion welding the first power supply line and the second power supply line together, and an insulating seal is provided around the welded portion.

[0012] Therefore, on the one hand, the welded part can be insulated from the outside world, reducing the risk of short circuit; on the other hand, the insulating seal can play a supporting role between the first overlapping section and the second overlapping section, improving the overall stiffness of the first sub-component of the sampling transmission component and the second sub-component of the sampling transmission component along the first direction.

[0013] In some embodiments, the first sub-component body includes a first main body portion and a first extension portion connected along a first direction, a first overlapping segment including the first extension portion, a sampling terminal first sub-component connected to the side of the first main body portion along a third direction, the third direction intersecting both the first and second directions, the second sub-component body includes a second main body portion, a second overlapping segment including a portion of the second main body portion close to the first sub-component body portion along the first direction, the sampling terminal second sub-component connected to the second main body portion, and at least the first extension portion of the first sub-component body overlapping with the second main body portion of the second overlapping segment.

[0014] Since the first sampling terminal is connected to the first main body, even if the first extension overlaps with the second main body, it is not easy for the first sampling terminal to interfere with the second sampling terminal. Moreover, the overlap area between the first extension and the second overlap section can be formed to be longer along the first direction, which is beneficial to improving the rigidity of the overlap part and the connection reliability and insulation reliability of the first power supply line and the second power supply line in the overlap section.

[0015] In some embodiments, the second overlap section further includes a portion of the sampling terminal second sub-component, at least one of the sampling terminal second sub-components of the second overlap section being located on the third-direction side of the first extension.

[0016] Therefore, the first extension, the second overlapping section, and the second sampling terminal sub-component of the second overlapping section can share a region along the first direction, which is beneficial for compactly arranging the first sampling transmission component and the second sampling transmission component. Moreover, there is no need to specially adjust the arrangement position of some sampling terminals or the spacing between battery cells in the sampled battery cell assembly. Therefore, it is possible to reliably sample battery cell assemblies with a long length along the first direction.

[0017] In some embodiments, the first sub-component body includes a first main body portion, the first overlapping section includes a portion of the first main body portion that is close to the second sub-component body along a first direction, the sampling terminal first sub-component is electrically connected to the first main body portion, the second sub-component body includes a second main body portion and a second extension portion connected along the first direction, the second overlapping section includes a second extension portion, the sampling terminal second sub-component is connected to the side of the second main body portion along a third direction, the third direction intersects both the first direction and the second direction, and at least the second extension portion of the second sub-component body overlaps with the first main body portion of the first overlapping section.

[0018] Since the second sub-component of the sampling terminal is connected to the second main body, even if the second extension overlaps with the first main body, it is not easy for the first sub-component of the sampling terminal and the second sub-component of the sampling terminal to interfere with each other. Moreover, the overlap area between the second extension and the first overlap section can be formed to be longer along the first direction, which is beneficial to improving the rigidity of the overlap part and the connection reliability and insulation reliability of the first power supply line and the second power supply line in the overlap section.

[0019] In some embodiments, the first overlap section further includes a portion of the sampling terminal first sub-component, at least one of the sampling terminal first sub-components of the first overlap section being located on the side of the second extension in a third direction.

[0020] Therefore, the second extension, the first overlapping section, and the first sampling terminal sub-component of the first overlapping section can share a region along the first direction, which is beneficial for compactly arranging the first sampling transmission component and the second sampling transmission component. Moreover, there is no need to specially adjust the arrangement position of some sampling terminals or the spacing between battery cells in the sampled battery cell assembly. Therefore, it is possible to reliably sample battery cell assemblies with a long length along the first direction.

[0021] In some embodiments, the battery device includes at least one sampling module, which includes a sampling transmission element and a signal processing component. The signal processing component processes the electrical signals of the battery cells collected by the sampling transmission element. The signal processing component is electrically connected to both a first sub-component and a second sub-component of the sampling transmission element. The battery device also includes a battery management system, which includes at least one main control module. The main control module is communicatively connected to the signal processing component.

[0022] This enables the monitoring and management of the working status of individual battery cells based on the physical parameters obtained from the sampling and transmission components.

[0023] In some embodiments, the first sub-component of the circuit integration component further includes a first communication connection portion connected to the body of the first sub-component, and the first communication connection portion is also provided with a first electrical line; the second sub-component of the circuit integration component further includes a second communication connection portion connected to the body of the second sub-component, and the second communication connection portion is also provided with a second electrical line; the signal processing component is connected to both the first communication connection portion and the second communication connection portion, thereby being electrically connected to both the first sub-component of the sampling transmission component and the second sub-component of the sampling transmission component.

[0024] Since both the first communication connection part and the second communication connection part are electrically connected to the signal processing component, the first sub-component body and the second sub-component body are electrically connected to the signal processing component. This allows the first sub-component of the sampling transmission component and the second sub-component of the sampling transmission component to be electrically connected to the signal processing component and share the signal processing component, which helps to reduce the number of parts and improve the space utilization of the battery device.

[0025] In some embodiments, along the second direction, the signal processing component is located on one side of the first sub-component body and the second sub-component body, the first sub-component of the circuit integration is formed such that the first communication connection portion is folded relative to the first sub-component body toward the side where the signal processing component is located, and the second sub-component of the circuit integration is formed such that the second communication connection portion is folded relative to the second sub-component body toward the side where the signal processing component is located.

[0026] Therefore, by bending a portion of the first sub-component of the circuit integration component and a portion of the second sub-component of the circuit integration component, an electrical connection with the signal processing component can be formed. This results in a simple structure and a reduction in the number of parts.

[0027] In some embodiments, the projections along the second direction onto the same projection plane overlap with the projection portion of the signal processing component, and the projections of the second communication connection portion overlap with the projection portion of the signal processing component.

[0028] Therefore, the first communication connection part and the second communication connection part only need to be folded to partially overlap with the signal processing component along the second direction to achieve electrical connection, which is simple in structure and reliable in connection; moreover, the signal processing component can also maintain the shape of the first sub-component body and the second sub-component body through the first communication connection part and the second communication connection part.

[0029] In some embodiments, the projections along the second direction onto the same projection plane are sequentially overlapped by the projections of the first communication connection portion, the signal processing component, and the first sub-component body, and the projections of the second communication connection portion, the signal processing component, and the second sub-component body.

[0030] This reduces the overall size of the sampling transmission components and signal processing components, saving space occupied by them.

[0031] In some embodiments, the projections along the second direction onto the same projection plane partially overlap each other, with the projections of the first overlapping segment, the second overlapping segment, and the signal processing component partially overlapping each other.

[0032] Therefore, it is easy to realize that the first sub-component of the sampling transmission device and the second sub-component of the sampling transmission device share the signal processing component, which is conducive to the miniaturization of the signal processing component and also conducive to reducing the length of the first communication connection part and the second communication connection part along the first direction.

[0033] In some embodiments, the battery device includes at least two sampling modules, including a first sampling module and a second sampling module, which sample the same physical quantity of the same battery cell assembly.

[0034] Since the first sampling module and the second sampling module sample the same physical quantity of the same battery cell assembly, that is, two sampling modules are set up for the same battery cell assembly, and the two sampling modules collect the same physical quantity of the battery cell assembly, the probability of missing or inaccurate physical quantity of the battery cell assembly due to damage or abnormality of a single sampling module can be reduced. The battery cell assembly can be monitored and managed more effectively based on at least one of the collected physical parameters such as temperature, voltage, and current, so that the battery cell assembly can work normally, which is conducive to further extending the service life of the battery device, and can also further reduce the probability of thermal runaway of the battery cell assembly.

[0035] In some embodiments, the first sampling module includes a first sampling transmission element and a first signal processing component, the first signal processing component processing the electrical signals of the battery cells collected by the first sampling transmission element; the second sampling module includes a second sampling transmission element and a second signal processing component, the second signal processing component processing the electrical signals of the battery cells collected by the second sampling transmission element; the battery device further includes a battery management system, the battery management system including at least two main control modules, the at least two main control modules including a first main control module and a second main control module, the first signal processing component being communicatively connected to the first main control module, and the second signal processing component being communicatively connected to the second main control module.

[0036] Since the sampling module includes sampling transmission components and signal processing components, redundancy is set for both sampling transmission and signal processing. In addition, the main control module in the thermal management system is also set with redundancy accordingly. This can further improve the reliability of the thermal management of the battery device.

[0037] In some embodiments, the first sampling transmission component includes a first sampling terminal and a first line integration component, and the second sampling transmission component includes a second sampling terminal and a second line integration component; the first line integration component and the second line integration component are stacked along a second direction; the first signal processing component and the second signal processing component are arranged along a first direction.

[0038] Therefore, not only can the first sampling module and the second sampling module sample the same physical quantity of the same battery cell assembly, but also, since the first and second line integration components are relatively long, their stacking along the second direction can fully utilize the space in the second direction of the battery cell assembly, reducing the occupation of space in the first and third directions. Even if sampling transmission components are set up separately for multiple battery cell assemblies, they can be easily arranged. Furthermore, since the first and second signal processing components are arranged along the first direction, the first and second line integration components can be easily electrically connected to the first and second signal processing components, respectively.

[0039] In some embodiments, the portion where the first overlapping segment and the second overlapping segment of the first sampling transmission member overlap are at least partially offset from the portion where the first overlapping segment and the second overlapping segment of the second sampling transmission member overlap along a first direction.

[0040] Therefore, the communication connection part in the first sampling transmission component and the communication connection part in the second sampling transmission component can be staggered along the first direction, making it less likely for the communication connection part in the first sampling transmission component and the communication connection part in the second sampling transmission component to interfere with each other. Moreover, each communication connection part can be folded to achieve connection with the signal processing component.

[0041] In some embodiments, along a second direction, a first line integration component is installed between a second line integration component and a first signal processing component and a second signal processing component; in the first sub-component of the second line integration component, a first communication connection portion is folded relative to the first sub-component body to which it is connected; in the second sub-component of the second line integration component, a second communication connection portion is folded relative to the second sub-component body to which it is connected; the first communication connection portion and the second communication connection portion in the second line integration component are folded relative to the second signal processing component on the same side in a third direction to the side of the second signal processing component away from the first sub-component body and the second sub-component body in the second line integration component along the second direction and are both connected to the second signal processing component.

[0042] Since the first circuit integration component is installed between the second circuit integration component and the first and second signal processing components along the second direction, it can share space in the first and third directions, which is beneficial to improving space utilization. In addition, the connection with the second signal processing component can be achieved by folding the first and second communication connection parts in the second circuit integration component, which is simple in structure. Moreover, since the first and second communication connection parts are folded and connected from the same side of the second signal processing component, the second signal processing component can be flipped with the first and second communication connection parts as the connection points during assembly or maintenance to expand the space between the second signal processing component and the body of the second circuit integration component, which facilitates the installation and maintenance of other components in this space.

[0043] In some embodiments, in the first sub-component of the first line integration component, the first communication connection portion is folded relative to the first sub-component body to which it is connected; in the second sub-component of the first line integration component, the second communication connection portion is folded relative to the second sub-component body to which it is connected; the first communication connection portion and the second communication connection portion of the first line integration component are folded relative to the first signal processing component on the same side or opposite side in a third direction to the side of the first signal processing component away from the first sub-component body and the second sub-component body in the first line integration component along a second direction and are both connected to the first signal processing component.

[0044] This makes it easy to connect the first circuit integration component to the first signal processing component.

[0045] In some embodiments, the battery device further includes: a bracket, including a bracket body and at least one support member connected to the bracket body; the battery cell assembly, the bracket body, the sampling transmission member, and the signal processing member are arranged sequentially along a second direction, and along the second direction, the support member is located on the side of the bracket body opposite to the battery cell assembly, at least a portion of the support member passes through the sampling transmission member and supports the signal processing member, and the second direction intersects the first direction.

[0046] Therefore, the bracket can be used to support the sampling transmission components and signal processing components, and the structure is simple.

[0047] In some embodiments, along the second direction, a first sub-component body and / or a second sub-component body are located between a support body and a signal processing assembly, and the first sub-component body and / or the second sub-component body are formed with at least one clearance hole; a support member passes through the clearance hole to support the signal processing assembly.

[0048] This allows the support to easily pass through the sampling and transmission component and connect to the signal processing assembly.

[0049] In some embodiments, multiple battery cells in the same battery cell assembly are arranged along a first direction. Each battery cell includes a housing and an electrode terminal located on the side of the housing facing the support body along a second direction. The battery device also includes at least one busbar located on the side of the support body facing away from the battery cell assembly along the second direction. The support body has an electrode terminal clearance hole, and the busbar connects the electrode terminals of different battery cells adjacent to each other along the first direction through the electrode terminal clearance hole.

[0050] Since the bracket body has electrode terminal clearance holes, the busbar can easily connect the electrode terminals of different battery cells adjacent to each other in the first direction through the electrode terminal clearance holes, thereby realizing electrical connection between different battery cells.

[0051] A second aspect of this application provides an electrical device, which includes the battery device described above.

[0052] Since the electrical device includes the aforementioned battery device, it is beneficial to reduce the number of parts in the electrical device and optimize the space utilization of the electrical device.

[0053] In some embodiments, the electrical device includes an aircraft.

[0054] Therefore, it helps to reduce the number of aircraft parts and optimize the space utilization of the aircraft. Attached Figure Description

[0055] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0056] Figure 1 Schematic diagrams of an aircraft structure provided for some embodiments of this application;

[0057] Figure 2Exploded perspective view of a battery device provided for some embodiments of this application;

[0058] Figure 3 An exploded perspective view of a battery cell provided for some embodiments of this application;

[0059] Figure 4 A partial three-dimensional structural schematic diagram of a battery device provided for some embodiments of this application;

[0060] Figure 5 for Figure 4 A magnified structural diagram of region A;

[0061] Figure 6 for Figure 4 A magnified structural diagram of region B;

[0062] Figure 7 A three-dimensional structural schematic diagram of a sampling transmission device provided for some embodiments of this application.

[0063] Figure 8 A partial perspective structural schematic diagram of a battery device provided for other embodiments of this application;

[0064] Figure 9 An exploded perspective view of the bracket, the first sampling transmission element, and the second sampling transmission element in their assembled state, as provided in some embodiments of this application;

[0065] Figure 10 A three-dimensional structural diagram of the first sampling transmission device and the second sampling transmission device in their assembled state, provided for some embodiments of this application;

[0066] Figure 11 for Figure 10 A magnified structural diagram of region C;

[0067] Figure 12 for Figure 10 A schematic diagram of the enlarged structure of region D;

[0068] Figure 13 Schematic diagrams of the support structure provided for some embodiments of this application;

[0069] Figure 14 A simplified diagram showing the connection of components in a sampling module provided for some embodiments of this application.

[0070] Explanation of reference numerals in the attached figures

[0071] 1000, Aircraft; 100, Battery Unit; 101, Housing; 101a, First Housing; 101b, Second Housing; 10, Battery Cell Assembly; 10a, First Battery Cell Group; 10b, Second Battery Cell Group; 1, Battery Cell; 1a, First Battery Cell; 1b, Second Battery Cell; 11, Electrode Assembly; 12, Tab; 13, Housing; 14, Electrode Terminal; 2, Sampling Module; 2a, First Sampling Module; 2b, Second Sampling Module Block; 20, Sampling transmission component; 20a, First sampling transmission component; 20b, Second sampling transmission component; 201, Sampling terminal; 201a, First sampling terminal; 201b, Second sampling terminal; 202, Circuit integration component; 202a, First circuit integration component; 202b, Second circuit integration component; 21, First sub-component of sampling transmission component; 211, First sub-component of sampling terminal; 212, First sub-component of circuit integration component; 2120, First sub-component body; 212 1. First main body; 2122. First extension; 213. First communication connection; 2131. First communication connection segment; 2132. Second communication connection segment; 22. Second sub-component of sampling transmission component; 221. Second sub-component of sampling terminal; 222. Second sub-component of circuit integration component; 2220. Second sub-component body; 2221. Second main body; 2222. Second extension; 223. Second communication connection; 2231. Third communication connection segment; 223 2. Fourth communication connection segment; 30. Signal processing component; 30a. First signal processing component; 30b. Second signal processing component; 3. Main control module; 3a. First main control module; 3b. Second main control module; 4. Bracket; 41. Bracket body; 411. Clearance hole; 42. Support component; 421. Support base; 422. Through part; 43. Electrode terminal clearance hole; 44. Positioning component; 5. Busbar; X first direction; Y second direction; Z third direction. Detailed Implementation

[0072] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0073] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0074] In the description of the embodiments of this application, the technical terms "first," "second," "third," "fourth," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0075] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0076] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0077] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this 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, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0078] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0079] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "overlap" should be interpreted broadly, and can refer to direct overlap or overlap with an intermediate medium layer.

[0080] The following is a detailed description of this application.

[0081] In related technologies, battery devices typically include battery cell modules, sampling modules, and a battery management system. Sampling modules collect and transmit physical parameters such as temperature, voltage, and current of the battery cell modules, and usually include sampling transmission components and signal processing components. The battery management system typically includes a main control module, which monitors and manages the operating status of each battery cell based on these collected physical parameters, ensuring the battery device operates in an optimal state and has a longer lifespan. Because a large number of physical parameters such as temperature, voltage, and current of the battery cell modules are collected, a large number of sampling modules are often required. These sampling modules occupy internal space in the battery device; therefore, optimizing the structure of the sampling modules to improve the space utilization of the battery device is one of the research issues in the industry.

[0082] For battery cell modules with a large number of individual cells and a long overall length, it is desirable to equip them with long sampling transmission components. Furthermore, to improve the integration of the sampling module, it is also desirable to use sampling transmission components with a double-sided layout. However, in some cases, such as when using a double-sided patterned flexible circuit board to fabricate the sampling transmission component, the length may not meet the desired requirements. Using multiple short sampling transmission components increases the number of components, requiring more electrical components or connecting harnesses, and complicates the assembly process.

[0083] Research has shown that multiple sampling transmission components can be stacked to form a longer sampling module. This not only reduces the number of sampling modules, but also allows the stacked sampling transmission components to share some electrical components, which helps to further reduce the number of parts in the battery device, simplify the wiring harness or layout design inside the battery device, and thus improve the space utilization of the battery device.

[0084] Based on this design concept, embodiments of this application provide a battery device, comprising: at least one battery cell assembly, including a plurality of first battery cells and a plurality of second battery cells arranged along a first direction; at least one sampling transmission element extending along the first direction, the sampling transmission element including at least one first sampling transmission element sub-component and at least one second sampling transmission element sub-component, the first sampling transmission element sub-component and the second sampling transmission element sub-component being arranged along the first direction, the first sampling transmission element sub-component being electrically connected to the first battery cell, and the second sampling transmission element sub-component being electrically connected to the second battery cell; the first sampling transmission element sub-component having a first overlapping section on the side of the first sampling transmission element sub-component closer to the second sampling transmission element sub-component along the first direction, the second sampling transmission element sub-component having a second overlapping section on the side of the first sampling transmission element sub-component closer to the first sampling transmission element sub-component along the first direction, the first overlapping section and the second overlapping section overlapping each other and being electrically connected along a second direction, the second direction intersecting the first direction.

[0085] Since the first sub-component of the sampling transmission component is electrically connected to the first battery cell and the second sub-component of the sampling transmission component is electrically connected to the second battery cell, the first and second sub-components of the sampling transmission component can respectively collect at least one of the physical parameters such as temperature, voltage, and current of the first and second battery cells. Thus, the battery cells can be monitored and managed based on the collected physical parameters, so that the battery cell assembly can work normally, which is beneficial to extending the service life of the battery device and reducing the probability of thermal runaway of the battery cells. Since the first overlapping section and the second overlapping section overlap and are electrically connected to each other, the first sub-component and the second sub-component of the sampling transmission component can form a sampling transmission component with a relatively long length along the first direction, which can overcome the length limitation of the sampling transmission component. For example, when the length of the battery cell assembly along the first direction is relatively long, the signal of the battery cell exceeds the line range that a single-sided sampling board can carry, so a double-sided sampling board is required. However, due to the material of the sampling board itself, manufacturing difficulty, etc., the length of the sampling transmission component along the first direction is limited. However, in the embodiments of this application, the first sub-component and the second sub-component of the sampling transmission component overlap along the first direction, which can not only overcome the length limitation of the sampling transmission component, but also share some electrical components. Therefore, the overlapping sampling transmission component can be applied to battery cell assemblies with a relatively long length along the first direction, and it is also beneficial to reduce the number of parts in the battery device and simplify the wiring harness or layout design inside the battery device, thereby improving the space utilization of the battery device.

[0086] The battery device provided in this application embodiment can be used, but is not limited to, in electrical devices such as energy storage devices, vehicles, ships, or aircraft.

[0087] This application also provides an electrical device including the above-described battery device. The electrical device can be, but is not limited to, a mobile phone, tablet, laptop, electric toy, power tool, electric vehicle, electric car, ship, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0088] For ease of explanation, we will use an aircraft 1000 as an example of an embodiment of the electrical device in this application.

[0089] Figure 1 Schematic diagrams of the aircraft structure provided for some embodiments of this application, such as Figure 1 As shown, the aircraft is equipped with a battery device 100, which can be installed in the fuselage or other locations of the aircraft and can be used to power the aircraft.

[0090] In some embodiments of this application, such as Figure 1As shown, the battery device 100 can not only serve as the operating power source for the aircraft 1000, but also as the driving power source for the aircraft 1000, replacing or partially replacing fuel or natural gas to provide driving power for the aircraft 1000.

[0091] Figure 2 This is an exploded perspective view of a battery device 100 provided in some embodiments of this application; the battery device mentioned in the embodiments of this application may include multiple battery cell assemblies 10 for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via busbars.

[0092] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0093] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 101 and a plurality of battery cell assemblies 10, the battery cell assemblies 10 being housed in the housing 101.

[0094] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0095] As an example, the battery cell assembly can also be housed in the housing by directly fixing multiple battery cells 1 to the housing 101.

[0096] As an example, such as Figure 2 As shown, the housing 101 may include a first housing 101a and a second housing 101b. The first housing 101a and the second housing 101b are fastened together to form a closed space inside the housing 101 to house the battery cell assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 101a may be a top cover or a bottom plate.

[0097] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0098] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0099] Figure 3 This is an exploded perspective view of a battery cell 1 provided for some embodiments of this application. The battery cell 1 generally includes an electrode assembly. The electrode assembly 11 includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell 1, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator is disposed between the positive and negative electrodes to prevent short circuits between them while allowing active ions to pass through.

[0100] In some embodiments, the battery cell 1 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application embodiment does not impose specific limitations on the type of electrolyte, and it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0101] In some embodiments, such as Figure 3 As shown, the electrode assembly 11 is provided with tabs 12, which can conduct current from the electrode assembly 11. The tabs include a positive tab and a negative tab.

[0102] As an example, battery cell 1 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells. Multi-prismatic battery cells are, for example, hexagonal prismatic battery cells. There are no particular limitations in the embodiments of this application.

[0103] In some embodiments, the battery cell may include a casing 13. The casing 13 may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0104] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0105] In some embodiments, the housing 13 includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0106] In some embodiments, at least one electrode terminal 14 is provided on the housing, and the electrode terminal 14 is electrically connected to the tab 12. The electrode terminal 14 can be directly connected to the tab 12, or it can be indirectly connected to the tab 12 through a current collector. The electrode terminal 14 can be provided on the end cap or on the housing.

[0107] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal pressure of the battery cell.

[0108] Below, refer to Figures 3 to 14 Some embodiments of this application will be described in detail.

[0109] In the description of the embodiments of this application, for ease of explanation, the direction of arrow X represents the "first direction", the direction of arrow Y represents the "second direction", and the direction of arrow Z represents the "third direction". The first direction X, the second direction Y, and the third direction Z intersect each other pairwise, and the three directions are not coplanar. In some embodiments, the first direction X, the second direction Y, and the third direction Z intersect each other perpendicularly.

[0110] The first aspect of this application provides a battery device, such as... Figure 4 and Figure 7 As shown, the battery device includes: at least one battery cell assembly, including a plurality of first battery cells 1a and a plurality of second battery cells 1b arranged along a first direction X; at least one sampling transmission member 20, extending along the first direction X, the sampling transmission member 20 including at least one sampling transmission member first sub-component 21 and at least one sampling transmission member second sub-component 22, the sampling transmission member first sub-component 21 and the sampling transmission member second sub-component 22 arranged along the first direction X, the sampling transmission member first sub-component 21 being electrically connected to the first battery cell 1a, and the sampling transmission member second sub-component 22 being electrically connected to the second battery cell 1b; the sampling transmission member first sub-component 21 is located on the side of the sampling transmission member second sub-component 22 along the first direction X (e.g., on the side closer to the sampling transmission member second sub-component 22). Figure 7 The left side shown has a first overlapping section, and the sampling transmission component second sub-component 22 is located on the side closer to the sampling transmission component first sub-component 21 along the first direction X (e.g., Figure 7 The right side shown has a second overlapping section along the second direction Y. The first overlapping section and the second overlapping section overlap each other and are electrically connected. The second direction Y intersects the first direction X.

[0111] Optionally, the battery cell assembly 10 can be two, three, four or more, etc.

[0112] In some embodiments, such as Figure 4 As shown, the plurality of battery cell assemblies 10 can be arranged along a first direction X, a second direction Y, or a third direction Z. In one specific embodiment, the plurality of battery cell assemblies 10 are arranged along the third direction Z.

[0113] In some embodiments, such as Figure 4 As shown, the battery cell assembly 10 includes multiple battery cells 1. In order to facilitate the distinction between the battery cells 1 sampled by the first sampling transmission unit 21 and the battery cells 1 sampled by the second sampling transmission unit 22, the multiple battery cells 1 sampled by the same sampling transmission unit 20 are divided into multiple first battery cells 1a and multiple second battery cells 1b. The multiple first battery cells 1a constitute a first battery cell group 10a, and the multiple second battery cells 1b constitute a second battery cell group 10b. The first battery cell group 10a and the second battery cell group 10b are arranged sequentially along the first direction X.

[0114] For example, the first battery cells 1a in the first battery cell group 10a are arranged along the first direction X.

[0115] For example, the second battery cells 1b in the second battery cell group 10b are arranged along the first direction X.

[0116] For ease of understanding, such as Figure 4 As shown, the part to the right of the dashed line L1 is the first battery cell group 10a, and the part to the left of the dashed line L1 is the second battery cell group 10b. It can be understood that the position of the dashed line L1 can vary depending on the range of battery cells sampled by the two sampling transmission components of the sampling transmission component. Moreover, it can be understood that the dashed line L1 is an imaginary line.

[0117] In some embodiments, the battery device includes at least one sampling module 2, each sampling module 2 capable of sampling physical quantities corresponding to each of the multiple battery cell assemblies. The sampling module 2 may include a sampling transmission component 20 and a signal processing component 30, wherein the sampling transmission component 20 is mainly used for the acquisition and transmission of physical quantity signals, and the signal processing component 30 is mainly used for signal processing, control, and communication, and may be primarily used for local control; sometimes the signal processing component 30 is also referred to as a slave control module. The battery device also includes a battery management system, such as... Figure 14 As shown, the battery management system may include a main control module 3, which is mainly used for overall control and can communicate with multiple signal processing components 30.

[0118] The sampling and transmission device 20 can collect physical parameters such as temperature, current and voltage of the battery cell 1.

[0119] For example, voltage sampling typically refers to monitoring the voltage of individual cells or modules to prevent overcharging or over-discharging. Current sampling typically refers to measuring the charge and discharge current using Hall effect sensors or shunts to calculate the state of charge (SOC). Temperature sampling typically refers to monitoring battery temperature using sensors such as positive temperature coefficient thermistors and negative temperature coefficient thermistors to prevent thermal runaway.

[0120] As a basic component of the sampling module, it may include sensors such as voltage acquisition chips, current sensors, and temperature sensors; signal conditioning circuits that filter and amplify the raw signal; power supply circuits that provide stable voltage to the sensors and signal chain (such as low-dropout linear regulators or isolated power supplies); and grounding designs that ensure signal integrity (such as analog / digital ground separation). Furthermore, the sampling module 2 may also include a multiplexer (MUX) and an analog-to-digital converter (ADC) to achieve high-precision data acquisition. This application does not impose any particular limitations on the configuration of the sampling module 2 for sampling and signal transmission; existing solutions can be used.

[0121] The sampling transmission component 20 mainly performs the function of signal transmission. It may include sampling terminals and circuit integration components. The sampling terminals mainly perform the function of electrical connection with the battery cell side and may include nickel strips, sampling windows, bonding wires, etc. The circuit integration components may include flexible circuit boards, flexible flat cables, printed circuit boards, etc.

[0122] In some specific embodiments, the circuit integration is constructed from a flexible printed circuit (FPC), which can be a single-sided flexible circuit, a double-sided flexible circuit, or a multi-layer flexible circuit.

[0123] In some embodiments, the sampling transmission component includes sampling transmission component sub-components, and the number of sampling transmission component sub-components can be multiple. These sampling transmission component sub-components can be arranged sequentially along a first direction X, and the sequential arrangement can be implemented by overlapping. For ease of description, two overlapping sampling transmission component sub-components are referred to as the first sampling transmission component sub-component and the second sampling transmission component sub-component. It is understood that the number of sampling transmission component sub-components can be more than two, and any two overlapping sampling transmission component sub-components can be referred to as the first sampling transmission component sub-component and the second sampling transmission component sub-component.

[0124] like Figure 4 and Figure 7 As shown, the sampling transmission component 20 includes a first sampling transmission component 21 and a second sampling transmission component 22. Of course, the sampling transmission component 20 may include other sampling transmission component components. The first sampling transmission component 21 and the second sampling transmission component 22 are connected and electrically connected along the first direction X.

[0125] In some embodiments, the first sub-component 21 of the sampling transmission component extends along a first direction X.

[0126] In some embodiments, the second sub-component 22 of the sampling transmission component extends along the first direction X.

[0127] In some embodiments, such as Figure 4 and Figure 5 As shown, the first sub-component 21 of the sampling transmission component is electrically connected to the first battery cell 1a. The first sub-component 21 of the sampling transmission component can be directly or indirectly electrically connected to the first battery cell 1a. For example, the first sub-component 21 of the sampling transmission component includes a first sub-component 211 of the sampling terminal, which is connected to the first battery cell 1a, thereby realizing the electrical connection between the first sub-component 21 of the sampling transmission component and the first battery cell 1a.

[0128] In some embodiments, the number of sampling terminal first sub-components 211 is multiple, and all or part of the first battery cells 1a in the first battery cell group 10a are electrically connected to different sampling terminal first sub-components 211.

[0129] In some embodiments, such as Figure 4 and Figure 5 As shown, the second sub-component 22 of the sampling transmission component is electrically connected to the second battery cell 1b. The second sub-component 22 of the sampling transmission component can be directly or indirectly electrically connected to the second battery cell 1b. For example, the second sub-component 22 of the sampling transmission component includes a second sub-component 221 of the sampling terminal, which is connected to the second battery cell 1b, thereby realizing the electrical connection between the second sub-component 22 of the sampling transmission component and the second battery cell 1b.

[0130] In some embodiments, such as Figure 3 and Figure 5 As shown, a single battery cell includes electrode terminals 14, and the battery assembly includes a busbar 5. The busbar 5 connects to the electrode terminals 14 of adjacent battery cells, thereby achieving electrical connection between battery cells. The sampling terminal 201 can be electrically connected to the busbar 5 or the electrode terminals 14, and of course, it can also be electrically connected to other parts of the battery cell 1. For example, in some embodiments, in order to monitor the temperature of the large surface of the battery cell 1, the sampling terminal 201 can be connected to the large surface of the battery cell 1.

[0131] In some embodiments, the sampling terminal 201 includes a first sampling terminal sub-component 211 and a second sampling terminal sub-component 221.

[0132] In some embodiments, such as Figure 7As shown, the portion of the first sub-component 21 of the sampling transmission component located within the dashed box O1 is the first overlapping segment, and the portion of the second sub-component 22 of the sampling transmission component located within the dashed box O1 is the second overlapping segment. Along the second direction Y, the overlapping portions of the first sub-component 21 and the second sub-component 22 of the sampling transmission component are their respective overlapping segments. The position and size of the dashed box O1 can be varied according to the actual situation; moreover, the dashed box O1 is a hypothetical box set for ease of explanation.

[0133] In some embodiments, at least one of the first overlapping section and the second overlapping section is configured as a plate.

[0134] In some embodiments, both the first overlapping segment and the second overlapping segment are plate-shaped. Optionally, the first overlapping segment and the second overlapping segment overlap along the thickness direction of the plate-shaped first overlapping segment; or along the width direction of the plate-shaped first overlapping segment.

[0135] In one specific embodiment, both the first overlapping segment and the second overlapping segment are plate-shaped, and the plate surface extension direction of both the first overlapping segment and the second overlapping segment is perpendicular to the second direction Y, and the first overlapping segment and the second overlapping segment overlap along the second direction Y.

[0136] Optionally, the first lap segment and the second lap segment can be directly lapped together, for example, by welding; the first lap segment and the second lap segment can also be indirectly lapped together, for example, by lapping together through a connector or connector.

[0137] In some embodiments, such as Figure 4 As shown, the sampling transmission component 20 is electrically connected to the signal processing component 30, and the signal processing component 30 is further electrically connected to the main control module. Thus, the sampling transmission component 20 can transmit the collected temperature and / or voltage, current, and other parameter data of the battery cell 1 to the signal processing component 30, and then to the main control module. The main control module monitors and manages the battery cell 1. The specific connection method between the signal processing component and the main control module can adopt a common method in the prior art, and will not be elaborated here.

[0138] Since the first sampling and transmission component 21 is electrically connected to the first battery cell 1a and the second sampling and transmission component 22 is electrically connected to the second battery cell 1b, the first sampling and transmission component 21 and the second sampling and transmission component 22 can respectively collect physical parameters such as temperature and / or voltage of the first battery cell 1a and the second battery cell 1b. Therefore, the battery cells can be monitored and managed based on the collected physical parameters such as temperature and / or voltage, so that the battery cell assembly 10 can work normally, which is beneficial to extending the service life of the battery device and reducing the probability of thermal runaway of the battery cells. Since the first overlapping section and the second overlapping section overlap and are electrically connected to each other, the first sub-component and the second sub-component of the sampling transmission component can form a sampling transmission component with a relatively long length along the first direction X, which can solve the length limitation of the sampling transmission component. For example, when the length of the battery cell assembly 10 along the first direction X is relatively long, the battery cell signal exceeds the line range that a single-sided sampling board can carry, so a double-sided sampling board is required. However, due to the material of the sampling board itself, manufacturing difficulty, etc., the length of the sampling transmission component along the first direction X is limited. In this embodiment, the first sub-component 21 and the second sub-component 22 of the sampling transmission component overlap along the first direction X, which can not only break through the length limitation of the sampling module 2, but also share some electrical components. Therefore, the overlapping sampling transmission component can be applied to the battery cell assembly 10 with a relatively long length along the first direction X, and it is also beneficial to reduce the number of parts of the battery device, simplify the wiring harness or layout design inside the battery device, thereby improving the space utilization of the battery device.

[0139] In some embodiments, such as Figure 4 As shown, the sampling transmission component 20 includes a sampling terminal 201 and a circuit integration component 202 connected to the sampling terminal 201. The circuit integration component 202 includes an integration component body and electrical wiring; as Figure 4 and Figure 7As shown, the first sub-component 21 of the sampling transmission component includes a first sub-component 212 of the circuit integration component. The first sub-component of the circuit integration component includes a first sub-component body 2120 and a first electrical circuit (not shown). The first electrical circuit is located on opposite sides of the first sub-component body 2120 along the second direction Y. The first electrical circuit includes a first communication line and a first power supply line. The sampling terminal first sub-component 211 is electrically connected to the first battery cell 1a and the first communication line. The second sub-component 22 of the sampling transmission component includes a second sub-component 222 of the circuit integration component. The second sub-component of the circuit integration component 222 includes a second sub-component body 2220 and a second electrical circuit (not shown). The second electrical circuit is located on opposite sides of the second sub-component body 2220 along the second direction Y. The second electrical circuit (not shown) includes a second communication line and a second power supply line. The sampling terminal second sub-component 221 is electrically connected to the second battery cell 1b and the second communication line. The portion of the first power supply line located at the first overlap section is electrically connected to the portion of the second power supply line located at the second overlap section.

[0140] In some embodiments, the first electrical circuit (not shown) includes a first communication line and a first power supply line. The first communication line is used to transmit analog or digital signals for collecting parameters such as temperature, voltage, and current of the first battery cell 1a. The first power supply line provides operating voltage from the power supply module to the first sub-component 21 of the sampling transmission device.

[0141] In some embodiments, the first electrical line (not shown) may further include a first auxiliary line, which may include a communication line, a balancing line, a ground wire, etc. The first auxiliary line can enhance the function of the first sub-component 21 of the sampling transmission device and improve the stability of the first sub-component 21 of the sampling transmission device.

[0142] In some embodiments, the second electrical circuit (not shown) includes a second communication line and a second power supply line. The second communication line is used to transmit analog or digital signals for collecting parameters such as temperature and / or voltage of the second battery cell 1b. The second power supply line provides operating voltage from the power supply module to the second sub-component 22 of the sampling transmission device.

[0143] In some embodiments, the second electrical line (not shown) may also include a second auxiliary line, which may include a communication line, a balancing line, a ground line, etc. The second auxiliary line can enhance the function of the second sub-component 22 of the sampling transmission device and improve the stability of the second sub-component 22 of the sampling transmission device.

[0144] The first sampling terminal component 211 collects the physical parameters of the first battery cell 1a and transmits the collected parameters to the signal processing component 30 via the first communication line; the second sampling terminal component 221 collects the physical parameters of the second battery cell 1b and transmits the collected parameters to the signal processing component 30 via the second communication line.

[0145] For example, the first sampling terminal 211 and / or the second sampling terminal 221 may be nickel sheets.

[0146] Optionally, the number of sampling terminal first sub-components 211 can be one, two, three or more, etc.

[0147] In some embodiments, a plurality of sampling terminals first sub-components 211 are staggered along a first direction X.

[0148] In some embodiments, there are multiple sampling terminal first sub-components 211, and each sampling terminal first sub-component 211 collects the physical parameters of each first battery cell in the first battery cell group 10a via a busbar.

[0149] Optionally, the number of sampling terminal second sub-components 221 can be one, two, three or more, etc.

[0150] In some embodiments, there are multiple sampling terminal second sub-components 221, and each sampling terminal second sub-component 221 collects the physical parameters of each second battery cell in the second battery cell group 10b via a busbar.

[0151] In some embodiments, a plurality of sampling terminal second sub-components 221 are staggered along a first direction X.

[0152] In some embodiments, the wiring assembly 202 may include an insulating substrate layer and electrical wiring carried and / or covered by the insulating substrate layer. In a specific embodiment, the insulating substrate layer forms the assembly body, and electrical wiring is arranged on opposite sides of the assembly body in the thickness direction.

[0153] In some embodiments, the circuit integration component includes a first sub-component 212 and a second sub-component 222.

[0154] Since the integrated component body has electrical wiring on both sides, compared to the case where the integrated component body has electrical wiring on only one side, more electrical wiring can be arranged without increasing the size of the integrated component body. Therefore, it is possible to sample more battery cells or collect more types of physical parameters without increasing the number of components. In addition, since the first power supply line and the second power supply line are electrically connected, the first sampling transmission component 21 and the second sampling transmission component 22 can share a power supply module, which can reduce the number of power supply modules required in the battery device. Furthermore, since the electrical connection between the two power supply lines is achieved at the overlap of the first overlap section and the second overlap section, it is not necessary to set up additional wiring harnesses, connectors, etc. for connecting the power supply lines, thus simplifying the wiring.

[0155] In some embodiments, the battery cell assembly 10 and the sampling transmission element 20 are arranged along the second direction Y, and the first power supply line is welded to the second power supply line.

[0156] In some embodiments, the direction in which the first overlap segment and the second overlap segment overlap is the same as the arrangement direction of the battery cell assembly 10 and the sampling transmission element 20.

[0157] Because the two power supply lines are welded together, the wiring harness, connectors, etc. used to electrically connect the two power supply lines are saved, which can save the space occupied by the components and reduce the overall size of the sampling transmission component first sub-component and the sampling transmission component second sub-component along the first direction X and the second direction Y, thereby improving the space utilization of the battery device.

[0158] In some embodiments, a weld portion is formed between the first lap section and the second lap section along the second direction Y, the weld portion welding the first power supply line and the second power supply line together, and an insulating seal (not shown) is provided around the weld portion.

[0159] In some embodiments, after the first electrical line located in the first overlap section is welded to the second electrical line located in the second overlap section, insulating glue can be injected between the first overlap section and the second overlap section, thereby achieving insulation and sealing of the parts other than the welding part of the first overlap section and the second overlap section.

[0160] Thus, on the one hand, the welded part can be insulated from the outside world, reducing the risk of short circuit; on the other hand, the insulating seal can play a supporting role between the first overlapping section and the second overlapping section, improving the overall stiffness of the whole formed by the first sub-component 21 of the sampling transmission component and the second sub-component 22 of the sampling transmission component along the first direction X.

[0161] In some embodiments, see Figure 7 The first sub-component body 2120 includes a first main body portion 2121 and a first extension portion 2122 connected along a first direction X. The first overlapping section includes the first extension portion 2122. The sampling terminal first sub-component 211 is connected to the side of the first main body portion 2121 along a third direction Z. The third direction Z intersects both the first direction X and the second direction Y. The second sub-component body 2220 includes a second main body portion 2221. The second overlapping section includes a portion of the second main body portion 2221 that is close to the first sub-component body 2120 along the first direction X. The sampling terminal second sub-component 221 is connected to the second main body portion 2221. At least the first extension portion 2122 of the first sub-component body 2120 overlaps with the second main body portion 2221 of the second overlapping section.

[0162] like Figure 7As shown, the portion of the first sub-component body 2120 within the dashed-dot frame O2 is the first main body 2121, the portion of the first sub-component body 2120 within the dashed frame O1 is the first extension 2122, and the portion of the first sub-component body 2120 within the dashed-dot frame O3 is the first overlapping segment. Here, the dashed frame O1, dashed-dot frame O2, and dashed-dot frame O3 are all imaginary frames used for ease of explanation.

[0163] Optionally, the first overlapping section may include a portion of the first extension 2122, all of the first extension 2122, or all of the first extension 2122 and a portion of the first main body 2121.

[0164] In some embodiments, along the third direction Z, the two ends of the first extension 2122 do not extend beyond the two ends of the second sub-body 2220.

[0165] Optionally, the first extension 2122 overlaps with the second main body 2221 of the second overlapping section; or the portion of the first main body 2121 close to the first extension 2122 along the first direction X and the first extension 2122 overlaps with the second main body 2221 of the second overlapping section.

[0166] In some embodiments, the first extension 2122 overlaps with the second overlap section, avoiding the position where the sampling terminal second sub-component 221 is connected to the second overlap section.

[0167] In some embodiments, the farthest distance between the two ends of the first extension 2122 along the third direction Z is less than the farthest distance between the two ends of the first main body 2121 along the third direction Z.

[0168] Since the first sampling terminal sub-component 211 is connected to the first main body, even if the first extension overlaps with the second main body, it is not easy for the first sampling terminal sub-component 211 and the second sampling terminal sub-component 221 to interfere with each other. Moreover, the overlap area between the first extension 2122 and the second overlap section can be formed to be longer along the first direction X, which is beneficial to improve the rigidity of the overlap section and the connection reliability and insulation reliability of the first power supply line and the second power supply line in the overlap section.

[0169] In some embodiments, see Figure 7 The second overlap section also includes a second sampling terminal component 221, at least one second sampling terminal component 221 of the second overlap section is located on the side of the first extension 2122 along the third direction Z.

[0170] Optionally, one, two, three or more sampling terminals of the second overlap section may be located on the side of the first extension 2122 along the third direction Z.

[0171] Therefore, the first extension 2122, the second overlapping section, and the sampling terminal second sub-component 221 of the second overlapping section can share a region along the first direction X, which is beneficial for compactly arranging the sampling transmission first sub-component 21 and the sampling transmission second sub-component 22. Moreover, there is no need to specially adjust the arrangement position of some sampling terminals or the spacing between battery cells in the sampled battery cell assembly 10. Therefore, it is possible to reliably sample battery cell assemblies 10 with a long length along the first direction X.

[0172] It is understandable that the sampling terminal second sub-component 221 of the second overlapping section may not be located on the side of the first extension 2122 along the third direction Z.

[0173] In some embodiments, such as Figure 7 As shown, the first sub-component body 2120 includes a first main body portion 2121, and a first overlapping section includes a portion of the first main body portion 2121 that is close to the second sub-component body 2220 along the first direction X. The sampling terminal first sub-component 211 is electrically connected to the first main body portion 2121. The second sub-component body 2220 includes a second main body portion 2221 and a second extension portion 2222 connected along the first direction X. The second overlapping section includes the second extension portion 2222. The sampling terminal second sub-component 221 is connected to the side of the second main body portion 2221 along the third direction Z. The third direction Z intersects both the first direction X and the second direction Y. At least the second extension portion 2222 of the second sub-component body 2220 overlaps with the first main body portion 2121 of the first overlapping section.

[0174] Optionally, the second sub-component body may also have a second main body portion and a second extension portion. Specifically, Figure 7 In the diagram, the left side is the first sub-component body, and the right side is the second sub-component body. The first sub-component body on the left has an extension (first extension), or conversely, the second sub-component body on the right has an extension (second extension). Its specific structure can be compared with... Figure 7 The structure shown is similar, so it will not be described again here.

[0175] Since the second sub-component 221 of the sampling terminal is connected to the second main body, even if the second extension overlaps with the first main body, it is not easy for the first sub-component 211 of the sampling terminal and the second sub-component 221 of the sampling terminal to interfere with each other. Moreover, the overlap area between the second extension 2222 and the first overlap section can be formed to be longer along the first direction X, which is beneficial to improve the rigidity of the overlap section and the connection reliability and insulation reliability of the first power supply line and the second power supply line in the overlap section.

[0176] In some embodiments, the first overlap section further includes a partial sampling terminal first sub-component 211, at least one sampling terminal first sub-component 211 of the first overlap section being located on the side of the second extension 2222 along the third direction Z.

[0177] Optionally, one, two, three or more sampling terminals 211 of the first overlapping section may be located on the side of the second extension 2222 along the third direction Z.

[0178] Therefore, the second extension, the first overlapping section, and the sampling terminal first sub-component 211 of the first overlapping section can share a region along the first direction X, which is beneficial for compactly arranging the sampling transmission first sub-component 21 and the sampling transmission second sub-component 22. Moreover, there is no need to specially adjust the arrangement position of some sampling terminals or the spacing between battery cells in the sampled battery cell assembly 10. Therefore, it is possible to reliably sample battery cell assemblies 10 with a long length along the first direction X.

[0179] It is understandable that the sampling terminal first sub-component 211 of the first overlapping section may not be located on the side of the second extension along the third direction Z.

[0180] In some embodiments, such as Figure 4 and Figure 14 As shown, the battery device includes at least one sampling module 2, which includes a sampling transmission component 20 and a signal processing component 30. The signal processing component 30 processes the electrical signals of the battery cell 1 collected by the sampling transmission component 20. The signal processing component 30 is electrically connected to both the first sub-component 21 and the second sub-component 22 of the sampling transmission component. The battery device also includes a battery management system, which includes at least one main control module 3. The main control module 3 is communicatively connected to the signal processing component 30.

[0181] The signal processing component 30 converts the analog electrical signals collected by the first sampling transmission component 21 and the second sampling transmission component 22 into digital electrical signals and transmits them to the main control module 3. The main control module 3 monitors and manages the working status of the battery cell 1 according to the electrical signals transmitted by the signal processing component 30.

[0182] For example, the signal processing component 30 is constituted by a printed circuit board (PCB) and electrical components disposed on the printed circuit board. Furthermore, the printed circuit board can be a printed circuit board that is not prone to flexible deformation.

[0183] This enables the monitoring and management of the working status of individual battery cells based on the physical parameters obtained from the sampling and transmission components.

[0184] In some embodiments, such as Figure 4 and Figure 7As shown, the first sub-component 212 of the circuit integration component also includes a first communication connection portion 213 connected to the first sub-component body 2120, and the first communication connection portion 213 is also provided with a first electrical line; the second sub-component 222 of the circuit integration component also includes a second communication connection portion 223 connected to the second sub-component body 2220, and the second communication connection portion 223 is also provided with a second electrical line; the signal processing component 30 is connected to both the first communication connection portion 213 and the second communication connection portion 223, thereby being electrically connected to both the first sub-component 21 of the sampling transmission component and the second sub-component 22 of the sampling transmission component.

[0185] In some embodiments, such as Figure 4 and Figure 7 As shown, the first battery cell 1a is connected to the first sampling terminal sub-component 211, the first sampling terminal sub-component 211 is connected to the first sub-component body 2120, the first sub-component body 2120 is connected to the first communication connection part 213, and the first communication connection part 213 is connected to the signal processing component 30 (e.g., the first signal processing component 30a). Both the first sub-component body 2120 and the first communication connection part 213 are provided with first electrical lines, thereby enabling the transmission of physical parameters such as temperature and / or voltage of the first battery cell group 10a to the battery management system.

[0186] In some embodiments, such as Figure 4 and Figure 7 As shown, the second battery cell 1b is connected to the second sampling terminal sub-component 221, the second sampling terminal sub-component 221 is connected to the second sub-component body 2220, the second sub-component body 2220 is connected to the second communication connection part 223, and the second communication connection part 223 is connected to the signal processing component 30 (e.g., the first signal processing component 30a). Both the second sub-component body 2220 and the second communication connection part 223 are provided with second electrical lines, thereby enabling the transmission of physical parameters such as temperature and / or voltage of the second battery cell group 10b to the battery management system.

[0187] Optionally, the first sub-component body 2120 and the first communication connection part 213 can be an integral structure or a separate structure. For example, the first sub-component body 2120 and the first communication connection part 213 can be welded together; the first sub-component 212 of the circuit integration component can also be integrally bent to form the first sub-component body 2120 and the first communication connection part 213.

[0188] Optionally, the second sub-component body 2220 and the second communication connection part 223 can be an integral structure or a separate structure. For example, the second sub-component body 2220 and the second communication connection part 223 can be welded together; the second sub-component 222 of the circuit integration component can also be integrally bent to form the second sub-component body 2220 and the second communication connection part 223.

[0189] Since the first communication connection part 213 and the second communication connection part 223 are both electrically connected to the signal processing component 30, the first sub-component body 2120 and the second sub-component body 2220 are both electrically connected to the signal processing component 30. This allows the first sampling transmission component 21 and the second sampling transmission component 22 to be electrically connected to the signal processing component 30 and share the signal processing component, which helps to reduce the number of parts and improve the space utilization of the battery device.

[0190] In some embodiments, such as Figure 6 and Figure 7 As shown, along the second direction Y, the signal processing component 30 is located on one side of the first sub-component body 2120 and the second sub-component body 2220. The first sub-component 212 of the circuit integration component is formed such that the first communication connection portion 213 is folded relative to the first sub-component body 2120 toward the side where the signal processing component 30 is located. The second sub-component 222 of the circuit integration component is formed such that the second communication connection portion 223 is folded relative to the second sub-component body 2220 toward the side where the signal processing component 30 is located.

[0191] In some embodiments, such as Figure 7 As shown, the first sub-component 212 of the circuit integration component includes a first sub-component body 2120 and a first communication connection part 213, see [link / reference]. Figure 6 Along the second direction Y, the first sub-component body 2120 is located between the signal processing component 30 and the battery cell assembly 10. The first communication connection portion 213 is folded relative to the first sub-component body 2120, thereby enabling the first communication connection portion 213 to connect with the signal processing component 30. Furthermore, a portion of the first communication connection portion 213 can be folded to the side of the signal processing component 30 opposite to the battery cell assembly 10 along the second direction Y (e.g., Figure 6 (as shown on the upper side).

[0192] In some embodiments, such as Figure 4 See also Figure 11 As shown, the first communication connection portion 213 includes a first communication connection segment 2131 and a second communication connection segment 2132 connected together. The first communication connection segment 2131 is located on the side of the signal processing component 30 facing away from the battery cell assembly 10 along the second direction Y (e.g., Figure 6 (as shown on the upper side), and electrically connected to the signal processing component 30, the second communication connection segment 2132 connects the first communication connection segment 2131 and the first sub-component body 2120.

[0193] In some embodiments, the second communication connection segment 2132 is located on either side of the signal processing component 30 along the third direction Z.

[0194] In some embodiments, such as Figure 7As shown, the second sub-component 222 of the circuit integration component includes a second sub-component body 2220 and a second communication connection part 223, see [link / reference]. Figure 6 Along the second direction Y, the second sub-component body 2220 is located between the signal processing component 30 and the battery cell assembly 10. The second communication connection portion 223 is folded relative to the second sub-component body 2220, thereby enabling the second communication connection portion 223 to connect with the signal processing component 30. Furthermore, a portion of the second communication connection portion 223 can be folded to the side of the signal processing component 30 opposite to the battery cell assembly 10 along the second direction Y (e.g., Figure 6 (as shown on the upper side).

[0195] In some embodiments, such as Figure 4 See also Figure 12 As shown, the second communication connection 223 includes a third communication connection segment 2231 and a fourth communication connection segment 2232 connected together. The third communication connection segment 2231 is located on the side of the signal processing component 30 facing away from the battery cell assembly 10 along the second direction Y (e.g., Figure 6 (as shown on the upper side), and electrically connected to the signal processing component 30, the fourth communication connection segment 2232 is connected to the third communication connection segment 2231 and the second sub-component body 2220.

[0196] In some embodiments, the fourth communication connection segment 2232 is located on either side of the signal processing component 30 along the third direction Z.

[0197] Therefore, by bending a portion of the first sub-component of the circuit integration component and a portion of the second sub-component of the circuit integration component, an electrical connection with the signal processing component can be formed. This results in a simple structure and a reduction in the number of parts.

[0198] In some embodiments, such as Figure 6 and Figure 7 As shown, when projected along the second direction Y into the same projection plane, the projection of the first communication connection part 213 overlaps with the projection of the signal processing component 30, and the projection of the second communication connection part 223 overlaps with the projection of the signal processing component 30.

[0199] In some embodiments, the projection of the first communication connection segment 2131 onto the same projection plane along the second direction Y overlaps with a portion of the projection of the signal processing component 30.

[0200] In some embodiments, the projection of the third communication connection segment 2231 onto the same projection plane along the second direction Y overlaps with a portion of the projection of the signal processing component 30.

[0201] Therefore, the first communication connection part and the second communication connection part only need to be folded to partially overlap with the signal processing component along the second direction to achieve electrical connection, which is simple in structure and reliable in connection; moreover, the signal processing component can also maintain the shape of the first sub-component body and the second sub-component body through the first communication connection part and the second communication connection part.

[0202] In some embodiments, such as Figure 6 and Figure 7 As shown, when projected along the second direction Y into the same projection plane, the projections of the first communication connection part 213, the signal processing component 30, and the first sub-component body 2120 overlap sequentially, and the projections of the second communication connection part 223, the signal processing component 30, and the second sub-component body 2220 overlap sequentially.

[0203] In some embodiments, when projected along the second direction Y into the same projection plane, the projections of the first communication connection portion 213 (e.g., the first communication connection segment 2131), the signal processing component 30, and the first sub-component body 2120 overlap at least partially with each other.

[0204] In some embodiments, the projections along the second direction Y into the same projection plane, the projections of the second communication connection portion 223 (e.g., the third communication connection segment 2231), the signal processing component 30, and the second sub-component body 2220 overlap at least partially with each other.

[0205] This reduces the overall size of the sampling transmission components and signal processing components, saving space occupied by them.

[0206] In some embodiments, such as Figure 4 and Figure 7 As shown, when projected along the second direction Y into the same projection plane, the projections of the first overlapping segment, the second overlapping segment, and the signal processing component 30 partially overlap each other.

[0207] In some embodiments, the projections along the second direction Y onto the same projection plane partially overlap each other with the projections of the first overlapping segment, the second overlapping segment, and the signal processing component 30.

[0208] Therefore, it is easy to realize that the first sub-component of the sampling transmission device and the second sub-component of the sampling transmission device share the signal processing component, which is conducive to the miniaturization of the signal processing component and also conducive to reducing the length of the first communication connection part and the second communication connection part along the first direction.

[0209] For the same battery cell assembly 10, one sampling module 2 can be arranged. However, if the sampling module 2 malfunctions or is damaged, there is a risk that the battery cell assembly 10 corresponding to the sampling module 2 cannot be monitored and managed. To reduce this risk and the frequency of maintenance or replacement due to the malfunction or damage of the sampling module 2, it is considered to set up multiple (e.g., two) sampling modules 2 for the same battery cell assembly 10, each independently sampling the same physical quantity, thus reducing the risk caused by the malfunction of any one sampling module 2. In this paper, this dual-module sampling situation is sometimes referred to as redundancy.

[0210] In some embodiments, such as Figure 8 and Figure 14 As shown, the battery device includes at least two sampling modules 2, which include a first sampling module 2a and a second sampling module 2b. The first sampling module 2a and the second sampling module 2b sample the same physical quantity for the same battery cell assembly 10.

[0211] In some embodiments, both the first sampling module 2a and the second sampling module 2b can sample the same battery cell assembly 10, thereby forming sampling redundancy.

[0212] In some embodiments, such as Figure 8 and Figure 10 As shown, the battery device includes a busbar 5, which connects adjacent battery cells 1 along the first direction X. The sampling terminals 201 of the first sampling module 2a (first sampling terminal sub-component 211 and / or second sampling terminal sub-component 221) and the sampling terminals 201 of the second sampling module 2b (first sampling terminal sub-component 211 and / or second sampling terminal sub-component 221) are respectively connected to both sides of the busbar 5 along the second direction Y (e.g., ...). Figure 8 The upper or lower side (as shown) is connected, so that the first sampling module 2a and the second sampling module 2b can collect physical parameters such as temperature, voltage and current of the same battery cell assembly.

[0213] In some embodiments, such as Figure 10 As shown, the sampling terminals 201 (first sampling terminal sub-component 211 and / or second sampling terminal sub-component 221) of the first sampling module 2a and the sampling terminals 201 (first sampling terminal sub-component 211 and / or second sampling terminal sub-component 221) of the second sampling module 2b are stacked in the second direction Y.

[0214] In some embodiments, such as Figure 10As shown, along the second direction Y, the sampling terminals 201 of the first sampling module 2a and the sampling terminals 201 of the second sampling module 2b are respectively connected to two opposite sides of the circuit integration component (first sub-component and / or second sub-component of the circuit integration component) of the first sampling module 2a and the circuit integration component (first sub-component and / or second sub-component of the circuit integration component) of the second sampling module 2b.

[0215] In some embodiments, within the same projection plane projected along the second direction Y, the projections of different sampling terminals connected to the same busbar have overlapping portions.

[0216] Since the first sampling module 2a and the second sampling module 2b sample the same physical quantity of the same battery cell assembly, that is, two sampling modules 2 are set up for the same battery cell assembly, and the two sampling modules collect the same physical quantity of the battery cell assembly, the probability of missing or inaccurate physical quantity of the battery cell assembly due to damage or abnormality of a single sampling module can be reduced. The battery cell assembly can be monitored and managed more effectively based on at least one of the collected physical parameters such as temperature, voltage, and current, so that the battery cell assembly can work normally, which is conducive to further extending the service life of the battery device, and can also further reduce the probability of thermal runaway of the battery cell assembly.

[0217] In some embodiments, such as Figure 14 As shown, the first sampling module 2a includes a first sampling transmission component 20a and a first signal processing component 30a. The first signal processing component 30a processes the electrical signals of the battery cells collected by the first sampling transmission component 20a. The second sampling module 2b includes a second sampling transmission component 20b and a second signal processing component 30b. The second signal processing component 30b processes the electrical signals of the battery cells 1 collected by the second sampling transmission component 20b. The battery device also includes a battery management system, which includes at least two main control modules 3, including a first main control module 3a and a second main control module 3b. The first signal processing component 30a is communicatively connected to the first main control module 3a, and the second signal processing component 30b is communicatively connected to the second main control module 3b.

[0218] In some embodiments, such as Figure 14 As shown, the battery device includes at least two sampling systems, which respectively collect physical quantities of at least two sets of battery cell components 10. At least two first signal processing components 30a in the at least two sampling systems are communicatively connected to a first main control module 3a, and at least two second signal processing components 30b in the at least two sampling systems are communicatively connected to a second main control module 3b.

[0219] In some embodiments, such as Figure 8As shown, the first sampling transmission element 20a and the second sampling transmission element 20b are arranged along the second direction Y, and the first signal processing component 30a and the second signal processing component 30b are arranged along the first direction X.

[0220] In some embodiments, such as Figure 10 As shown, in the first sampling module 2a, the first sampling transmission component 20a includes a first sampling transmission component 21 and a second sampling transmission component 22.

[0221] In some embodiments, such as Figure 10 As shown, in the second sampling module 2b, the second sampling transmission component 20b includes a first sampling transmission component 21 and a second sampling transmission component 22.

[0222] Since the sampling module includes sampling transmission components and signal processing components, redundancy is set for both sampling transmission and signal processing. In addition, the main control module in the thermal management system is also set with redundancy accordingly. This can further improve the reliability of the thermal management of the battery device.

[0223] In some embodiments, such as Figure 8 and Figure 10 As shown, the first sampling transmission component 20a includes a first sampling terminal 201a and a first line integration component 202a, and the second sampling transmission component 20b includes a second sampling terminal 201b and a second line integration component 202b; the first line integration component 202a and the second line integration component 202b are stacked along the second direction Y; the first signal processing component 30a and the second signal processing component 30b are arranged along the first direction X.

[0224] In some embodiments, in the first sampling transmission component 20a, the first sampling terminal 201a includes a first sampling terminal sub-component 211 and a second sampling terminal sub-component 221, and the first line integration component 202a includes a first line integration component 212 and a second line integration component 222.

[0225] In some embodiments, in the second sampling transmission component 20b, the second sampling terminal 201b includes a first sampling terminal sub-component 211 and a second sampling terminal sub-component 221, and the second line integration component 202b includes a first line integration component 212 and a second line integration component 222.

[0226] In some embodiments, along the second direction Y, a portion of the first line integration 202a and a portion of the second line integration 202b are located between the signal processing component 30 and the battery cell assembly.

[0227] Therefore, not only can the first sampling module 2a and the second sampling module 2b sample the same physical quantity of the same battery cell assembly 10, but also, since the first line integration component 202a and the second line integration component 202b are relatively long components, and they are stacked along the second direction Y, the space in the second direction Y of the battery cell assembly 10 can be fully utilized, reducing the space occupied in the first direction X and the third direction Z. Even if sampling transmission components 20 are set for multiple battery cell assemblies 10 arranged separately, they can be easily arranged. Moreover, since the first signal processing component 30a and the second signal processing component 30b are arranged along the first direction X, the first line integration component 202a and the second line integration component 202b can be easily electrically connected to the first signal processing component 30a and the second signal processing component 30b, respectively.

[0228] In some embodiments, such as Figure 10 As shown, the overlapping portions of the first overlapping segment and the second overlapping segment in the first sampling transmission component 20a and the overlapping portions of the first overlapping segment and the second overlapping segment in the second sampling transmission component 20b are at least partially offset along the first direction X.

[0229] In some embodiments, the portion where the first overlapping segment and the second overlapping segment overlap in the first sampling transmission member 20a are partially or completely offset from the portion where the first overlapping segment and the second overlapping segment overlap in the second sampling transmission member 20b along the first direction X.

[0230] Therefore, the communication connection part in the first sampling transmission member 20a and the communication connection part in the second sampling transmission member 20b can be offset along the first direction X, making it less likely for the communication connection part in the first sampling transmission member 20a and the communication connection part in the second sampling transmission member 20b to interfere with each other. Moreover, each communication connection part can be folded to achieve connection with the signal processing component 30.

[0231] In some embodiments, such as Figure 8 and Figure 10As shown, along the second direction Y, the first line integration component 202a is installed between the second line integration component 202b and the first signal processing component 30a and the second signal processing component 30b. In the first sub-component 212 of the line integration component 202b, the first communication connection portion 213 is folded relative to the first sub-component body 2120 to which it is connected. In the second sub-component 222 of the line integration component 202b, the second communication connection portion 223 is folded relative to the second sub-component body 2220 to which it is connected. The first communication connection portion 213 and the second communication connection portion 223 in the second line integration component 202b are folded relative to the second signal processing component 30b on the same side of the third direction Z to the side of the second signal processing component 30b away from the first sub-component body 2120 and the second sub-component body 2220 of the second line integration component 202b along the second direction Y and are both connected to the second signal processing component 30b.

[0232] In some specific embodiments, such as Figure 10 As shown, in the first line assembly 202a, a first communication connection portion 213 is formed on the first main body portion of the first sub-assembly 212 of the line assembly, and a second communication connection portion 223 is formed on the second extension portion of the second sub-assembly 222 of the line assembly. In the second line assembly 202b, the first communication connection portion 213 is formed on the first extension portion of the first sub-assembly 212 of the line assembly, and the second communication connection portion 223 is formed on the second main body portion of the second sub-assembly 222 of the line assembly.

[0233] In some embodiments, such as Figures 10 to 12 As shown, the second communication connection segment 2132 and the fourth communication connection segment 2232 in the first line assembly 202a are located on the same side of the first signal processing component 30a along the third direction Z, and the second communication connection segment 2132 and the fourth communication connection segment 2232 in the second line assembly 202b are located on the same side or both sides of the second signal processing component 30b along the third direction Z.

[0234] Since the first line integration component 202a is installed between the second line integration component 202b and the first signal processing component 30a and the second signal processing component 30b along the second direction Y, it can share space in the first direction X and the third direction Z, which is beneficial to improving space utilization. In addition, the connection with the second signal processing component 30b can be achieved by folding the first communication connection part 213 and the second communication connection part 223 in the second line integration component 202b, which is simple in structure. Moreover, since the first communication connection part 213 and the second communication connection part 223 are both folded and connected from the same side of the second signal processing component 30b, during the assembly or maintenance stage, the second signal processing component 30b can be flipped with the first communication connection part 213 and the second communication connection part 223 as the connection part to expand the space between the second signal processing component 30b and the body of the second line integration component 202b, which facilitates the installation and maintenance of other components in this space.

[0235] Further details: The first line integration component 202a and the second line integration component 202b are stacked, with the second line integration component 202b located between the first line integration component 202a and the battery cell assembly 10. The first line integration component 202a is located between the first signal processing component 30a and the second signal processing component 30b and the second line integration component 202b, i.e., along the first direction X toward the battery cell assembly 10. The signal processing component 30 (the first signal processing component 30a and the second signal processing component 30b), the first line integration component 202a, and the second line integration component 202b are stacked sequentially.

[0236] To ensure that the communication connection portion in the second line integration component 202b does not obstruct the installation of the first line integration component after being connected to the first sub-component body and the second sub-component body, the first communication connection portion 213 and the second communication connection portion 223 of the second sampling transmission component 20b are arranged on the same side. In this way, after being connected to the second signal processing component 30b, a flexible hinge structure can be formed between the communication connection portion in the second line integration component 202b and the second sampling transmission component 20b, realizing the opening and closing of the second sampling transmission component 20b and the second signal processing component 30b. Therefore, after the assembly of the second sampling transmission component 20b and the second signal processing component 30b is completed, the flexible hinge structure can be opened, and the first sampling transmission component 20a and the first signal processing component 30a can be stacked on the second sampling transmission component 20b. Then, the flexible hinge structure can be closed, and the second signal processing component 30b can be stacked on the first sampling transmission component 20a.

[0237] In some embodiments, in the first sub-component 212 of the first line integration component 202a, the first communication connection portion 213 is folded relative to the first sub-component body 2120 to which it is connected; in the second sub-component 222 of the first line integration component 202a, the second communication connection portion 223 is folded relative to the second sub-component body 2220 to which it is connected; the first communication connection portion 213 and the second communication connection portion 223 in the first line integration component 202a are folded relative to the first signal processing component 30a on the same side or opposite side in the third direction Z to the side of the first signal processing component 30a away from the first sub-component body 2120 and the second sub-component body 2220 in the first line integration component 202a along the second direction Y and are both connected to the first signal processing component 30a.

[0238] This makes it easy to connect the first circuit integration component to the first signal processing component.

[0239] In some embodiments, such as Figure 8 and Figure 9 As shown, the battery device further includes: a bracket 4, including a bracket body 41 and at least one support member 42 connected to the bracket body 41; the battery cell assembly 10, the bracket body 41, the sampling transmission member 20, and the signal processing member 30 are arranged sequentially along the second direction Y. Along the second direction Y, the support member 42 is located on the side of the bracket body 41 opposite to the battery cell assembly 10, and at least a portion of the support member 42 passes through the sampling transmission member 20 and supports the signal processing member 30. The second direction Y intersects the first direction X.

[0240] Optionally, the bracket 4 may include one, two, three or more support members 42.

[0241] Therefore, the bracket 4 can be used to support the sampling transmission component 20 and the signal processing component 30, and the structure is simple.

[0242] In some embodiments, such as Figure 5 As shown, the bracket 4 also includes a positioning member 44 connected to the bracket body 41. Along the second direction Y, the positioning member 44 passes through the first overlapping portion and the second overlapping portion, thereby enabling the relative position of the first overlapping portion and the second overlapping portion to be fixed.

[0243] In some embodiments, such as Figures 8 to 10 As shown, along the second direction Y, the first sub-component body 2120 and / or the second sub-component body 2220 are located between the support body 41 and the signal processing assembly 30, and the first sub-component body 2120 and / or the second sub-component body 2220 are formed with at least one clearance hole 411; the support member passes through the clearance hole 411 to support the signal processing assembly 30.

[0244] In some embodiments, the first sub-component body 2120 is formed with at least one clearance hole 411, and the support member passes through the clearance hole 411 to support the signal processing component 30. The clearance hole 411 may be formed by a recess in the third direction Z of the side portion of the first sub-component body 2120, or the clearance hole 411 may be formed by an opening at the middle position of the first sub-component body 2120.

[0245] In some embodiments, the second sub-component body has at least one clearance hole 411, and the support member 42 supports the signal processing component 30 through the clearance hole 411. The clearance hole 411 may be formed by a recess in the third direction Z of the side portion of the second sub-component body 2220, or the clearance hole 411 may be formed by an opening at the middle position of the second sub-component body 2220.

[0246] This application does not specifically limit the shape and size of the clearance hole 411, as long as it allows part of the support member to pass through the first sub-component body 2120 and / or the second sub-component body 2220.

[0247] In some embodiments, the support includes a support base 421 connected to the bracket body 41 and a through portion 422 connected to the support base 421 on the side opposite to the bracket body 41.

[0248] In some embodiments, along the second direction Y, the support base 421 abuts against the signal processing component 30, and the through portion 422 passes through the signal processing component 30; and / or along the second direction Y, the support base 421 abuts against the signal processing component 30, and the through portion 422 passes through the signal processing component 30 and the first communication connection portion 213 and / or the second communication connection portion 223 in sequence, thereby not only supporting the signal processing component 30, but also using the through portion 422 to position and connect the first communication connection portion 213 and / or the second communication connection portion 223 to the signal processing component 30.

[0249] This allows the support member 42 to easily pass through the first sub-component body 2120 and / or the second sub-component body 2220 and connect to the signal processing component 30.

[0250] In some embodiments, such as Figure 3 , Figure 8 and Figure 13 As shown, multiple battery cells 1 in the same battery cell assembly 10 are arranged along the first direction X. Each battery cell includes a housing 13 and an electrode terminal 14 located on the side of the housing 13 facing the support body 41 along the second direction Y. The battery device also includes at least one busbar 5 located on the side of the support body 41 facing away from the battery cell assembly 10 along the second direction Y. The support body 41 has an electrode terminal clearance hole 43. The busbar connects the electrode terminals 14 of different adjacent battery cells along the first direction X through the electrode terminal clearance hole 43.

[0251] This application does not specifically limit the shape and size of the electrode terminal clearance hole 43, as long as it enables the busbar to connect the electrode terminals 14 of different adjacent battery cells along the first direction X through the electrode terminal clearance hole 411.

[0252] Since the bracket body 41 has an electrode terminal clearance hole 43, the busbar can easily connect the electrode terminals 14 of different battery cells adjacent to each other along the first direction X through the electrode terminal clearance hole, thereby realizing the electrical connection between different battery cells.

[0253] In some embodiments, such as Figure 8 and Figure 9 As shown, the signal processing component 30 has support members 42 at both ends along the third direction Z. Multiple support members 42 are staggered along the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0254] Therefore, the support can provide relatively stable support for the signal processing component 30.

[0255] A second aspect of this application provides an electrical device, which includes the battery device described above.

[0256] Since the electrical device includes the aforementioned battery device, it is beneficial to reduce the number of parts in the electrical device and optimize the space utilization of the electrical device.

[0257] In some embodiments, the electrical device includes an aircraft.

[0258] Therefore, it helps to reduce the number of aircraft parts and optimize the space utilization of the aircraft.

[0259] The following is a specific example of an embodiment of this application.

[0260] In a specific embodiment, such as Figures 4 to 10 As shown, the battery cells need to transmit their voltage, current, and temperature signals to the battery management system for data analysis via the sampling module 2. The sampling module 2 includes sampling transmission components, which come in various forms, including circuit integration components. Circuit integration components are generally made of flexible printed circuit boards (FPCs). Flexible printed circuit boards (FPCs) are available in single-sided, double-sided, and multi-layer types. Single-sided boards are generally used because they are inexpensive and have few limitations in manufacturing processes, and their length can be around 2 meters. Double-sided and multi-layer boards, on the other hand, have length limitations. When the signals from multiple battery cells in a battery module exceed the circuit range that a single-sided board can carry, a double-sided or even multi-layer board is required. Therefore, a structure that solves the length limitation of double-sided or multi-layer boards is needed.

[0261] The sampling transmission component 20 of the sampling module of this application is constructed using a flexible printed circuit board (FPC). The sampling transmission component includes multiple sampling transmission component sub-components (e.g., a first sampling transmission component 21 and a second sampling transmission component 22). Different sampling transmission component sub-components are electrically connected by welding overlap, thereby saving connectors and reducing the height dimension of the battery pack along the second direction Y, thus improving the volumetric energy density of the battery pack. The first overlap segment has a first positioning hole, and the second overlap segment has a second positioning hole. The first positioning hole and the second positioning hole at least partially overlap along the second direction Y, thereby achieving relative positioning of the first overlap segment and the second overlap segment using the first positioning hole and the second positioning hole, improving the interface compatibility of the electrical connection between the first overlap segment and the second overlap segment. A welded part is formed between the first overlap segment and the second overlap segment along the second direction Y, and the welded part welds the first power supply line and the second power supply line together. An insulating seal (not shown) is provided around the welded part to improve the insulation withstand voltage performance of the first overlap segment and the second overlap segment.

[0262] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of this application.

Claims

1. A battery device, characterized in that, include: At least one battery cell assembly includes a plurality of first battery cells and a plurality of second battery cells arranged along a first direction; At least one sampling transmission element extends along the first direction, the sampling transmission element includes at least one first sampling transmission element sub-element and at least one second sampling transmission element sub-element, the first sampling transmission element sub-element and the second sampling transmission element sub-element are arranged along the first direction, the first sampling transmission element sub-element is electrically connected to the first battery cell, and the second sampling transmission element sub-element is electrically connected to the second battery cell; The first sub-component of the sampling transmission device has a first overlapping section on the side of the second sub-component of the sampling transmission device along a first direction, and the second sub-component of the sampling transmission device has a second overlapping section on the side of the first sub-component of the sampling transmission device along a first direction. Along a second direction, the first overlapping section and the second overlapping section overlap each other and are electrically connected. The second direction intersects the first direction.

2. The battery device according to claim 1, characterized in that, The sampling transmission device includes a sampling terminal and a line integration component connected to the sampling terminal. The line integration component includes an integration component body and electrical wiring. The first sub-component of the sampling transmission component includes a first sub-component of sampling terminals and a first sub-component of circuit integration. The first sub-component of circuit integration includes a first sub-component body and a first electrical circuit. The first electrical circuit is located on opposite sides of the first sub-component body along the second direction. The first electrical circuit includes a first communication line and a first power supply line. The first sub-component of sampling terminals is electrically connected to the first battery cell and the first communication line. The second sub-component of the sampling transmission component includes a second sub-component of a sampling terminal and a second sub-component of a circuit integration component. The second sub-component of the circuit integration component includes a second sub-component body and a second electrical circuit. The second electrical circuit is located on opposite sides of the second sub-component body along the second direction. The second electrical circuit includes a second communication line and a second power supply line. The second sub-component of the sampling terminal is electrically connected to the second battery cell and the second communication line. The portion of the first power supply line located at the first overlapping section is electrically connected to the portion of the second power supply line located at the second overlapping section.

3. The battery device according to claim 2, characterized in that, The battery cell assembly and the sampling transmission device are arranged along the second direction, and the first power supply line is welded to the second power supply line.

4. The battery device according to claim 3, characterized in that, A welded portion is formed between the first overlapping section and the second overlapping section along the second direction, the welded portion welding the first power supply line and the second power supply line together, and an insulating seal is provided around the welded portion.

5. The battery device according to claim 2, characterized in that, The first sub-component body includes a first main body portion and a first extension portion connected along a first direction. The first overlapping section includes the first extension portion. The sampling terminal first sub-component is connected to the side of the first main body portion along a third direction, which intersects both the first direction and the second direction. The second sub-component body includes a second main body portion, and the second overlapping section includes a portion of the second main body portion that is close to the first sub-component body along the first direction. The sampling terminal second sub-component is connected to the second main body portion. At least the first extension portion of the first sub-component body overlaps with the second main body portion of the second overlapping segment.

6. The battery device according to claim 5, characterized in that, The second overlap section also includes a portion of the second sampling terminal sub-component, at least one of the second sampling terminal sub-components of the second overlap section being located on the side of the first extension in a third direction.

7. The battery device according to claim 2, characterized in that, The first sub-component body includes a first main body portion, and the first overlapping section includes a portion of the first main body portion that is close to the second sub-component body along the first direction. The sampling terminal first sub-component is electrically connected to the first main body portion. The second sub-component body includes a second main body portion and a second extension portion connected along a first direction. The second overlapping section includes the second extension portion. The sampling terminal second sub-component is connected to the side of the second main body portion along a third direction, which intersects both the first direction and the second direction. At least the second extension portion of the second sub-component body overlaps with the first main body portion of the first overlapping segment.

8. The battery device according to claim 7, characterized in that, The first overlap section also includes a portion of the first sampling terminal component, at least one of the first sampling terminal components of the first overlap section being located on the side of the second extension in a third direction.

9. The battery device according to any one of claims 2 to 8, characterized in that, The battery device includes at least one sampling module, which includes the sampling transmission element and a signal processing component. The signal processing component processes the electrical signals of the individual battery cells collected by the sampling transmission element. The signal processing component is electrically connected to both the first sub-component and the second sub-component of the sampling transmission component. The battery device further includes a battery management system, which includes at least one main control module and is communicatively connected to the signal processing component.

10. The battery device according to claim 9, characterized in that, The first sub-component of the line integration component also includes a first communication connection part connected to the body of the first sub-component, and the first electrical circuit is also provided in the first communication connection part. The second sub-component of the circuit assembly further includes a second communication connection part connected to the body of the second sub-component, and the second electrical circuit is also provided in the second communication connection part; The signal processing component is connected to both the first communication connection and the second communication connection, thereby being electrically connected to both the first sub-component and the second sub-component of the sampling transmission component.

11. The battery device according to claim 10, characterized in that, Along the second direction, the signal processing component is located on one side of the first sub-component body and the second sub-component body. The first sub-component of the line integration component is formed such that the first communication connection portion is folded towards the side where the signal processing component is located relative to the body of the first sub-component. The second sub-component of the line integration component is formed such that the second communication connection portion is folded relative to the body of the second sub-component toward the side where the signal processing component is located.

12. The battery device according to claim 11, characterized in that, Projecting along the second direction onto the same projection plane, the projection of the first communication connection overlaps with the projection of the signal processing component, and the projection of the second communication connection overlaps with the projection of the signal processing component.

13. The battery device according to claim 12, characterized in that, Projecting along the second direction onto the same projection plane, the projections of the first communication connection, the signal processing component, and the first sub-component body overlap sequentially, as do the projections of the second communication connection, the signal processing component, and the second sub-component body.

14. The battery device according to claim 13, characterized in that, Projecting along the second direction onto the same projection plane, the projections of the first overlapping segment, the second overlapping segment, and the signal processing component partially overlap each other.

15. The battery device according to any one of claims 10 to 14, characterized in that, The battery device includes at least two sampling modules, including a first sampling module and a second sampling module, wherein the first sampling module and the second sampling module sample the same physical quantity of the same battery cell assembly.

16. The battery device according to claim 15, characterized in that, The first sampling module includes a first sampling transmission element and a first signal processing component, wherein the first signal processing component processes the electrical signals of the battery cells collected by the first sampling transmission element; The second sampling module includes a second sampling transmission component and a second signal processing component, wherein the second signal processing component processes the electrical signals of the battery cells collected by the second sampling transmission component; The battery device further includes a battery management system, which includes at least two main control modules, including a first main control module and a second main control module. The first signal processing component is communicatively connected to the first main control module, and the second signal processing component is communicatively connected to the second main control module.

17. The battery device according to claim 16, characterized in that, The first sampling transmission device includes a first sampling terminal and a first line integration component, and the second sampling transmission device includes a second sampling terminal and a second line integration component; The first line integration component and the second line integration component are stacked along the second direction; the first signal processing component and the second signal processing component are arranged along the first direction.

18. The battery device according to claim 17, characterized in that, The portion where the first overlapping segment and the second overlapping segment of the first sampling transmission component overlap are at least partially offset from the portion where the first overlapping segment and the second overlapping segment of the second sampling transmission component overlap along the first direction.

19. The battery device according to claim 17 or 18, characterized in that, Along the second direction, the first line integration component is installed between the second line integration component and the first signal processing component and the second signal processing component; In the first sub-component of the second circuit assembly, the first communication connection portion is folded relative to the body of the first sub-component to which it is connected; in the second sub-component of the second circuit assembly, the second communication connection portion is folded relative to the body of the second sub-component to which it is connected. The first communication connection portion and the second communication connection portion in the second line assembly are folded on the same side of the third direction relative to the second signal processing component, to the side of the second signal processing component away from the first sub-component body and the second sub-component body in the second line assembly along the second direction, and are both connected to the second signal processing component. The third direction intersects both the first direction and the second direction.

20. The battery device according to claim 19, characterized in that, In the first sub-component of the first line assembly, the first communication connection portion is folded relative to the body of the first sub-component to which it is connected; in the second sub-component of the first line assembly, the second communication connection portion is folded relative to the body of the second sub-component to which it is connected. The first communication connection portion and the second communication connection portion in the first line assembly are folded on the same side or opposite side of the first signal processing component in the third direction to the side of the first signal processing component away from the first sub-component body and the second sub-component body in the first line assembly along the second direction, and are both connected to the first signal processing component.

21. The battery device according to any one of claims 10 to 14, 16 to 18, and 20, characterized in that, The battery device also includes: A support frame includes a support frame body and at least one support member connected to the support frame body; The battery cell assembly, the support body, the sampling transmission element, and the signal processing component are arranged sequentially along a second direction. Along the second direction, the support element is located on the side of the support body opposite to the battery cell assembly. At least a portion of the support element passes through the sampling transmission element and supports the signal processing component. The second direction intersects the first direction.

22. The battery device according to claim 21, characterized in that, Along the second direction, the first sub-component body and / or the second sub-component body are located between the support body and the signal processing assembly, and the first sub-component body and / or the second sub-component body form at least one clearance hole; the support member passes through the clearance hole to support the signal processing assembly.

23. The battery device according to claim 22, characterized in that, Multiple battery cells in the same battery cell assembly are arranged along a first direction, and each battery cell includes a housing and electrode terminals located on the side of the housing facing the support body along a second direction. The battery device further includes at least one busbar located on the side of the support body opposite to the battery cell assembly along the second direction. The support body has an electrode terminal clearance hole, and the busbar connects to the electrode terminals of the adjacent battery cells along the first direction through the electrode terminal clearance hole.

24. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 23.

25. The electrical appliance according to claim 24, characterized in that, The electrical equipment includes aircraft.

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