Battery assembly, battery pack, and vehicle

Abstract

Provided in the present application are a battery assembly, a battery pack and a vehicle. The battery assembly comprises: a battery module and a connection assembly. The battery module comprises a plurality of battery cells distributed in rows and columns; the battery module extends in a first direction. The connection assembly is connected to the battery module; the connection assembly comprises a first framework and a plurality of connecting members. The first framework comprises a plurality of first sub-frameworks, each first sub-framework being connected to a connecting member. The plurality of first sub-frameworks are distributed in the first direction, and adjacent first sub-frameworks can move relative to each other in the first direction. Thus, during installation, each first sub-framework can be individually positioned with respect to the battery module in the first direction, such that the accumulation of positional errors between the connecting members and the battery cells is reduced, lowering the requirements for the processing and installation accuracy of the battery assembly, and thus reducing the manufacturing cost of the battery module. Thus, by applying the battery assembly in the present embodiments to the battery pack, the manufacturing cost of the battery pack can be reduced.

Description

Battery components, battery packs, and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202422692379.9, filed on November 5, 2024, entitled "Battery Components, Battery Packs and Vehicles", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of battery technology, and particularly to a battery component, a battery pack, and a vehicle. Background Technology

[0003] Because a single battery has a relatively small energy storage capacity, it needs to be connected in series and parallel to form a battery pack before being used in vehicles. In some technologies, the battery pack typically includes a connecting assembly and a battery module. The battery module includes multiple arranged individual cells, and the connecting assembly includes multiple connecting tabs used to connect adjacent individual cells, allowing them to be connected in series or parallel. To facilitate the assembly of the connecting tabs, the connecting assembly includes a frame, and the connecting tabs are connected to the frame to form an integral structure. During assembly, the connecting assembly can be attached to the battery pack, and then the connecting tabs can be welded together.

[0004] However, to meet the range requirements of vehicles, the number of individual battery cells is enormous, and the number of connecting pieces is also considerable. Therefore, when the connecting components are installed as a whole, the positional errors between the connecting pieces and the individual battery cells will accumulate. To ensure the proper installation of the battery pack, the battery components need to have high processing and installation precision, which increases the manufacturing cost of the battery pack. Summary of the Invention

[0005] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0006] This application proposes a battery assembly that can be used in a battery pack to reduce the manufacturing cost of the battery pack.

[0007] This application also provides a battery pack including the above-described battery components.

[0008] This application also provides a vehicle that includes the aforementioned battery pack.

[0009] A battery assembly according to a first aspect of this application includes a battery pack and a connection assembly.

[0010] The battery pack includes a plurality of individual cells arranged along a first direction, and the battery pack extends along the first direction; the connecting component includes a first frame and a plurality of connecting pieces, the first frame includes a plurality of first sub-frames, the plurality of first sub-frames are distributed along the first direction, and adjacent first sub-frames are movable relative to each other along the first direction, each first sub-frame is connected to a connecting piece, the connecting piece is connected to the individual cells, and is used to electrically connect the individual cells in series or in parallel.

[0011] The battery assembly according to the embodiments of this application has at least the following beneficial effects:

[0012] In this embodiment, the first frame in the connecting assembly includes a plurality of first sub-frames distributed along a first direction, and adjacent first sub-frames are movable relative to each other along the first direction. Therefore, during installation, each first sub-frame can be individually positioned relative to the battery pack in the first direction, thereby reducing the cumulative positional errors between the connecting pieces mounted on the first frame and the individual cells, lowering the processing and installation accuracy requirements of the battery assembly, and thus reducing the manufacturing cost of the battery pack. Therefore, when the battery assembly of this embodiment is used in a battery pack, the manufacturing cost of the battery pack can be reduced.

[0013] According to some embodiments of this application, adjacent first sub-frames are separately configured.

[0014] According to some embodiments of this application, the battery assembly further includes a plurality of first limiting members, each of the first sub-frames being connected to at least one first limiting member; the single cell includes a housing and a terminal post, the housing having a first side and a second side, the terminal post being connected to the first side, the connecting component being located on the first side, and the first limiting member being connected to the first sub-frame and abutting against the second side, for limiting the relative position of the connecting component and the single cell.

[0015] According to some embodiments of this application, the single cell is a cylindrical cell, the second side is a cylindrical surface, and the first limiting member has an arc-shaped limiting surface adapted to the second side, the limiting surface abutting against the second side.

[0016] According to some embodiments of this application, the battery assembly includes a second frame, which includes a plurality of second sub-frames, each of which is connected to a sub-circuit board.

[0017] According to some embodiments of this application, the first limiting member and the first frame are an integral structure; or, the first limiting member and the first frame are separate structures.

[0018] According to some embodiments of this application, the battery assembly further includes a data acquisition component, which includes a circuit board. The circuit board includes a first telescopic portion and a plurality of sub-circuit boards. The plurality of sub-circuit boards are distributed along the first direction and connected to the battery pack for acquiring parameter signals of the individual battery cells. The first telescopic portion is connected to adjacent sub-circuit boards and is capable of telescoping along the first direction.

[0019] According to some embodiments of this application, the circuit board is a flexible circuit board, which includes the sub-circuit boards and the first telescopic portion that are alternately connected along the first direction, and the first telescopic portion is a curved portion of the flexible circuit board that is bent along its own thickness direction.

[0020] According to some embodiments of this application, the battery assembly further includes a second frame, which includes a plurality of second sub-frames, each of which is connected to one of the sub-circuit boards, and adjacent second sub-frames are movable relative to each other along the first direction.

[0021] A battery pack according to a second aspect embodiment of this application includes: a bottom shell, a cover plate, and a battery assembly according to a first aspect embodiment. The bottom shell has a receiving groove, the battery assembly is located in the receiving groove, and the cover plate is connected to the bottom shell and seals the receiving groove.

[0022] The battery pack according to the embodiments of this application has at least the following beneficial effects:

[0023] In the battery assembly of the first aspect embodiment, the first frame of the battery assembly includes a plurality of first sub-frames distributed along the first direction, and adjacent first sub-frames are movable relative to each other along the first direction. Therefore, during installation, each first sub-frame can be individually positioned relative to the battery pack in the first direction, thereby reducing the cumulative positional errors between the connecting pieces mounted on the first frame and the individual cells, reducing the processing accuracy and installation accuracy requirements of the battery assembly, thereby reducing the manufacturing cost of the battery pack, and further reducing the manufacturing cost of the battery pack in this embodiment.

[0024] A vehicle according to a third aspect of this application includes: the battery pack described in the second aspect of the embodiment.

[0025] The vehicle according to the embodiments of this application has at least the following beneficial effects:

[0026] In the battery pack of the second aspect embodiment, the first frame of the battery pack includes a plurality of first sub-frames distributed along the first direction, and adjacent first sub-frames are movable relative to each other along the first direction. Therefore, during installation, each first sub-frame can be individually positioned with respect to the battery pack in the first direction, thereby reducing the cumulative positional errors between the connecting pieces mounted on the first frame and the individual battery cells, reducing the processing accuracy and installation accuracy requirements of the battery components, thereby reducing the manufacturing cost of the battery pack, and further reducing the manufacturing cost of the vehicle of this embodiment.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. Other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. Attached Figure Description

[0028] The accompanying drawings are used to provide a further understanding of the technical solutions of this application and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions of this application.

[0029] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 is a schematic diagram of the structure of a battery assembly according to a first aspect of this application;

[0031] Figure 2 is a schematic diagram of the connecting components in Figure 1;

[0032] Figure 3 is an enlarged view of region A in Figure 2;

[0033] Figure 4 is an enlarged view of region B in Figure 2;

[0034] Figure 5 is a structural schematic diagram of a single battery cell and the first limiting member;

[0035] Figure 6 is a schematic diagram of the acquisition component in Figure 1;

[0036] Figure 7 is an enlarged view of region C in Figure 6;

[0037] Figure 8 is a schematic diagram of the structure of a battery pack according to a second aspect embodiment of this application.

[0038] Reference numerals: Battery assembly 1000; Battery pack 100, single cell 110, casing 111, first side 1111, second side 1112, terminal post 120; Connecting assembly 200, connecting piece 210, first frame 220, first sub-frame 221, first limiting hole 2211; First limiting member 300, limiting surface 310, connecting part 320; Acquisition assembly 400, circuit board 410, sub-circuit board 411, first telescopic part 412, second frame 420, second sub-frame 421, second limiting hole 4211; Flexible circuit board 500, bending part 510; Second limiting member 600. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0043] Because a single battery has a relatively small energy storage capacity, it needs to be connected in series and parallel to form a battery pack before being used in vehicles. In some technologies, the battery pack typically includes a connecting assembly and a battery module. The battery module includes multiple arranged individual cells, and the connecting assembly includes multiple connecting tabs used to connect adjacent individual cells, allowing them to be connected in series or parallel. To facilitate the assembly of the connecting tabs, the connecting assembly includes a frame, and the connecting tabs are connected to the frame to form an integral structure. During assembly, the connecting assembly can be attached to the battery pack, and then the connecting tabs can be welded together.

[0044] However, to meet the range requirements of vehicles, the number of individual battery cells is enormous, and the number of connecting pieces is also considerable. Therefore, when the connecting components are installed as a whole, the positional errors between the connecting pieces and the individual battery cells accumulate. These errors stem from various factors, including the manufacturing and installation errors of the individual battery cells, the manufacturing errors of the battery pack frame, the manufacturing and installation errors of the connecting pieces, and so on. For example, if a battery pack has a first end and a second end in a first direction, and the first end is used as the positioning reference during installation, the positional error between the connecting piece and the individual battery cell increases as the positional error accumulates, becoming larger the further away from the first end. To ensure proper installation of the battery pack, high manufacturing and installation precision are required, leading to increased manufacturing costs.

[0045] In view of the above problems, this application proposes a battery component 1000 that can be used in a battery pack to reduce the manufacturing cost of the battery pack.

[0046] Referring to Figures 1 to 3, Figure 1 is a structural schematic diagram of a battery assembly according to a first aspect of this application, Figure 2 is a structural schematic diagram of a connecting component in Figure 1, and Figure 3 is an enlarged view of region A in Figure 2. The battery assembly 1000 of this embodiment includes: a battery pack 100 and a connecting component 200.

[0047] The battery pack 100 includes multiple individual cells 110 arranged along a first direction (as shown in Figure 1). The first direction is, for example, the length or width direction of the battery pack. The individual cells 110 are, for example, square cells, cylindrical cells, or blade cells. The connecting assembly 200 includes a first frame 220 and multiple connecting pieces 210 (as shown in Figure 2). The connecting pieces 210 are, for example, conductive structures such as copper or aluminum sheets. The first frame 220 includes multiple first sub-frames 221, which are distributed along the first direction. Adjacent first sub-frames 221 are separate structures that are not connected to each other (as shown in Figure 3), or adjacent first sub-frames 221 are connected by a second telescopic part that can extend and retract along the first direction, so that adjacent first sub-frames 221 can move relative to each other along the first direction. Each first sub-frame 221 is connected to a connecting piece 210, which is connected to the individual cells 110 to electrically connect the individual cells 110 in series or in parallel. For example, taking a cylindrical battery as an example, a single cell 110 includes a casing 111 and an electrode post 120. The casing 111 is connected to the internal anode as the negative electrode. When adjacent single cells 110 are connected in series, one end of the connecting piece 210 is connected to the electrode post 120 of one single cell 110, and the other end is connected to the casing 111 of the single cell 110. When adjacent cells are connected in parallel, both ends of the connecting piece 210 are connected to the same electrode of the two single cells 110, for example, both are connected to the casing 111 of the battery, or both are connected to the electrode post 120 of the battery. It should be noted that, in the embodiments, the connection between single cells 110 is not limited to a single series or parallel connection; it can also be a combination of some cells connected in series and some cells connected in parallel.

[0048] Specifically, in this embodiment, the first frame 220 in the connecting assembly 200 includes a plurality of first sub-frames 221 distributed along a first direction, and adjacent first sub-frames 221 are movable relative to each other along the first direction. Therefore, during assembly, each first sub-frame 221 can be individually positioned with the battery pack 100 in the first direction, thereby reducing the cumulative positional error between the connecting piece 210 mounted on the first frame 220 and the individual battery cell 110, reducing the processing accuracy and installation accuracy requirements of the battery assembly 1000, and thus reducing the manufacturing cost of the battery pack 100. When the battery assembly 1000 of this embodiment is used in a battery pack, the manufacturing cost of the battery pack can be reduced.

[0049] Optionally, in some embodiments, the first sub-frame 221 includes a plurality of first frame portions distributed along the second direction (perpendicular to the first direction), and adjacent first frame portions can move relative to each other along the second direction, thereby reducing the accumulation of errors of the connecting component 200 in the second direction. The specific principle is the same as that of adjacent first sub-frames 221 being able to move relative to each other along the first direction, and will not be repeated here.

[0050] Referring to Figure 3, in some embodiments, adjacent first sub-frames 221 are separately arranged. That is, in this embodiment, the complete first frame 220 is divided into multiple independent first sub-frames 221, so that the first sub-frames 221 and the connecting pieces 210 connected to the first sub-frames 221 together constitute a sub-connecting assembly, thereby making the connecting assembly 200 include multiple relatively independent sub-connecting assemblies. Therefore, during installation, each sub-connecting assembly can be installed individually. Specifically, the connecting assembly 200 is a thin, large-area structure, which is not only prone to significant error accumulation during installation, but also prone to deformation during handling. This embodiment can effectively improve this problem. This embodiment divides the large-area connecting assembly 200 into multiple small-area sub-connecting assemblies, which can be handled and positioned individually. This not only reduces the risk of deformation of the connecting assembly 200 during handling, but also reduces the accumulation of errors during installation, thereby improving the positional accuracy of each connecting piece 210 and reducing the processing accuracy and installation accuracy requirements of the battery assembly 1000.

[0051] Furthermore, it should be noted that since the first sub-frame 221 in this embodiment is a split structure, it can move independently not only in the first direction but also in the second direction, which further reduces the processing difficulty of the battery module 1000 and thus reduces the manufacturing cost of the battery module 1000.

[0052] Referring to Figures 3 to 5, Figure 4 is an enlarged view of region B in Figure 2, and Figure 5 is a structural schematic diagram of a single battery cell and a first limiting member. In some embodiments, the battery assembly 1000 further includes multiple first limiting members 300, and each first sub-frame 221 is connected to at least one first limiting member 300 (as shown in Figures 3 and 4). The single battery cell 110 includes a housing 111 and a terminal post 120. The housing 111 has a first side 1111 and a second side 1112. The terminal post 120 is connected to the first side 1111. The connecting assembly 200 is located on the first side 1111 of the single battery cell 110. The first limiting member 300 is connected to the first sub-frame 221 and abuts against the second side 1112 (as shown in Figure 5).

[0053] Specifically, it is understandable that, in order to ensure that the single cell 110 has a high energy density, the size of the electrode post 120 protruding from the outer casing 111 is small. Therefore, when the first frame 220 is set on the first side 1111, the space between the first frame 220 and the first side 1111 is small. If the electrode post 120 is used as the positioning structure on the single cell 110, the first limiting member 300 needs to be located between the first side 1111 and the first frame 220, which not only increases the installation difficulty of the limiting structure, but also increases the processing difficulty of the first limiting member 300. Specifically, because the space between the first frame 220 and the first side 1111 is narrow, it is difficult to observe the positioning during installation, which is not conducive to assembly. If the thickness of the first limiting member 300 is too large, it will push up the first frame 220, causing the connecting piece 210 to separate from the single cell 110. If the thickness of the first limiting member 300 is too small, it is easy to cause positioning failure. This embodiment effectively improves this problem. In this embodiment, the first limiting member 300 abuts against the second side 1112, so that the installation of the first limiting member 300 and the installation of the first frame 220 in the direction of the battery pack 100 of the connecting assembly 200 do not interfere with each other. Therefore, the size of the first limiting member is not limited by the distance between the first sub-frame 221 and the first side 1111, thereby reducing the processing requirements of the first limiting member 300 and thus reducing the manufacturing cost.

[0054] Referring to Figure 5, in some embodiments, the single cell 110 is a cylindrical cell, the second side surface 1112 is a cylindrical surface, and the first limiting member 300 has an arc-shaped limiting surface 310 adapted to the second side surface 1112, the limiting surface 310 abutting against the second side surface 1112. Specifically, it can be understood that the limiting surface 310 is a concave curved surface, which can limit the displacement of the first sub-frame 221 and the battery pack 100 in multiple directions. Exemplarily, the battery pack 100 also has a set width, and the first limiting member 300 is engaged with the cylindrical surface of the single cell 110 through the concave limiting surface 310. Thus, not only can the positioning of the first frame 220 and the battery pack 100 in the first direction be realized, but also the positioning of the first sub-frame 221 and the battery pack 100 in the battery width direction can be realized, thereby making the structure of the battery assembly 1000 in this embodiment simpler and reducing the processing cost of the battery assembly 1000.

[0055] Based on the above embodiments, the first limiting member 300 and the first sub-frame 221 are an integral structure. For example, the first limiting member 300 and the first sub-frame 221 are formed by 3D printing, machining or injection molding and other processes. This integral structure can not only eliminate the installation steps between the first sub-frame 221 and the first limiting member 300 to save assembly costs, but also eliminate the installation error between the first limiting member 300 and the first sub-frame 221 to improve the installation accuracy between the first sub-frame 221 and the battery pack 100.

[0056] Referring to Figure 4, in some embodiments, the first limiting member 300 and the first sub-frame 221 are separate structures. For example, the first limiting member 300 and the first sub-frame 221 are connected by snap-fit, threaded connection, or screw connection to form a separate structure. Therefore, during processing, the first sub-frame 221 and the first limiting member 300 can be processed separately, thereby reducing the processing cost of the connecting assembly 200. For example, the first sub-frame 221 and the first limiting member 300 have a dimension L in the thickness direction of the battery pack 100. If the first sub-frame 221 and the first limiting member 300 are formed from the same piece of base material, the thickness of the base material must be at least L. However, since each first sub-frame 221 only has one, two, or three equal numbers of first limiting members 300, a large amount of material needs to be removed from the base material during processing, resulting in material waste. Furthermore, it is understandable that even when the first frame 220 is divided into multiple first sub-frames 221, it still has a large area. Therefore, when directly machining the relatively complex first limiting member 300 onto the first sub-frame 221, fixing the first sub-frame 221 becomes quite troublesome. In this embodiment, the first sub-frame 221 and the first limiting member 300 are designed as separate structures, which allows for the separate machining of the first sub-frame 221 and the first limiting member 300, effectively improving this problem and reducing machining costs.

[0057] The first limiting member 300 includes, for example, a connecting portion 320. The first sub-frame 221 has a first limiting hole 2211. The connecting portion 320 is inserted into the first limiting hole 2211. When the connecting portion 320 is a cylindrical structure, the first limiting member 300 includes at least two connecting portions 320, thereby preventing the first limiting member 300 from rotating relative to the first sub-frame 221 and improving the positional accuracy between the first limiting member 300 and the first sub-frame 221.

[0058] Referring to Figures 1, 6, and 7, Figure 6 is a schematic diagram of the acquisition component in Figure 1, and Figure 7 is an enlarged view of region C in Figure 6. In some embodiments, the battery assembly 1000 further includes an acquisition component 400, which includes a circuit board 410, such as a rigid circuit board or a flexible circuit board. The circuit board 410 includes a first telescopic portion 412 and a plurality of sub-circuit boards 411. The plurality of sub-circuit boards 411 are distributed along a first direction (as shown in Figure 6) and are electrically connected to the battery pack 100 for acquiring parameter signals of the individual battery cells 110. The parameter signals include, for example, voltage, current, temperature, or capacity. The first telescopic portion 412 is, for example, a flexible strip, cable, or conductive metal sheet for conductive connection. The first telescopic portion 412 is connected to adjacent sub-circuit boards 411 (as shown in Figure 7). The first telescopic portion 412 can extend and retract along the first direction so that adjacent sub-circuit boards 411 can move relative to each other along the first direction.

[0059] Specifically, the acquisition component 400 is used to acquire parameter signals from the individual battery 110. The circuit board 410 includes multiple connection points. If the circuit board 410 is a traditional circuit board, the positional error increases due to the accumulation of errors at the connection points far from the positioning point. However, in this example, adjacent sub-circuit boards 411 can move relative to each other in the first direction. Therefore, during the installation of the circuit board 410, the positioning between each sub-circuit board 411 and the battery pack 100 is independent, thereby reducing the accumulation of positional errors between the circuit board 410 and the individual battery 110 during installation. This reduces the processing requirements of the battery pack 1000 and thus reduces processing costs.

[0060] Optionally, the sub-circuit board 411 includes a board body and a third telescopic part that are alternately connected along the second direction. The third telescopic part can extend and retract along the second direction. The specific principle is similar to that of the first telescopic part 412 described above, and will not be repeated here.

[0061] Referring to Figure 7, based on the above embodiment, the circuit board 410 is a flexible circuit board 500. The flexible circuit board 500 includes sub-circuit boards 410 and a first telescopic portion 412 that are alternately connected along a first direction. The first telescopic portion 412 is a bent portion 510 of the flexible circuit board 500 that is bent along its own thickness direction. Therefore, no additional structure is needed to form the first telescopic portion 412, which makes the structure of the circuit board 410 simpler and reduces the installation steps between the first telescopic portion 412 and the sub-circuit board 411, making the assembly of the battery pack 100 simpler and improving the assembly efficiency of the battery pack 100.

[0062] Referring to Figures 6 and 7, based on the above embodiment, the acquisition component 400 further includes a second frame 420, which includes multiple second sub-frames 421. Each second sub-frame 421 is connected to a sub-circuit board 411, thereby improving the overall structural stability of the acquisition component 400 and preventing deformation or damage due to external forces during transportation, installation, and use. Simultaneously, the flexible circuit board 500 is connected to the second frame 420, which improves the positional accuracy of each connection point on the flexible circuit board 500, making the installation of the battery component 1000 in this embodiment more convenient. Adjacent second sub-frames 421 can move relative to each other along a first direction to ensure the extensibility of the flexible circuit board 500 in the first direction.

[0063] In some embodiments, the sub-circuit board 411 includes a plate body and a third telescopic portion alternately connected along a second direction. The third telescopic portion is capable of telescoping along the second direction, and its specific principle is similar to that of the first telescopic portion described above, and will not be repeated here. Correspondingly, the second sub-frame 421 includes a plurality of second frame portions distributed along the second direction, each second frame portion being connected to a plate body. Optionally, when the circuit board 410 is a flexible circuit board 500, the third telescopic portion is formed by bending the flexible circuit board 500 along its own thickness direction.

[0064] Referring to Figures 4 and 6, in some embodiments, the battery assembly 1000 further includes a second limiting member 600, which is connected to the first sub-frame 221 and the second sub-frame 421 for positioning between the second sub-frame 421 and the first sub-frame 221 to achieve positioning of the flexible circuit board 500. Optionally, in some embodiments, the acquisition component 400 is located on the side of the connecting component 200 away from the battery pack 100. The first sub-frame 221 has a through first limiting hole 2211, and the first limiting member 300 has a connecting portion 320. The connecting portion 320 passes through the first limiting hole 2211 and protrudes from the first sub-frame 221 toward the acquisition component 400. The portion of the connecting portion 320 protruding from the first sub-frame 221 toward the acquisition component 400 forms a second limiting member 600. The second sub-frame 421 has a second limiting hole 4211, and the second limiting member 600 is inserted into the second limiting hole 4211 to achieve the positioning of the acquisition component. This eliminates the need for additional components to serve as the second limiting member 600, thereby simplifying the structure of the battery pack 1000 in this embodiment and reducing manufacturing costs.

[0065] Referring to Figure 8, which is a schematic diagram of the structure of a battery pack according to a second aspect embodiment of this application, the battery pack according to the second aspect embodiment includes: a bottom shell, a cover plate, and a plurality of battery components 1000 according to the first aspect embodiment. The bottom shell has a receiving groove, the battery components 1000 are located in the receiving groove, and the cover plate is connected to the bottom shell and seals the receiving groove. The first frame 220 in the battery component 1000 includes a plurality of first sub-frames 221 distributed along a first direction, and adjacent first sub-frames 221 are movable relative to each other along the first direction. Therefore, during installation, each first sub-frame 221 can be individually positioned relative to the battery pack 100 in the first direction, thereby reducing the cumulative positional error of the connecting pieces 210 mounted on the first frame 220, reducing the installation error of the first frame 220, thereby reducing the processing accuracy and installation accuracy requirements of the connecting components 200, thereby reducing the manufacturing cost of the battery pack 100, and further reducing the manufacturing cost of the battery pack in this embodiment.

[0066] It should be noted that this embodiment adopts all the technical features of the battery pack 100 of the first aspect embodiment, and therefore this embodiment has all the beneficial effects brought by the first aspect embodiment, which will not be repeated here.

[0067] According to the third aspect embodiment of this application, the vehicle can be a private car, such as a sedan, SUV, MPV, or pickup truck. The vehicle can also be a commercial vehicle, such as a van, bus, small truck, or large trailer. The vehicle can be a hybrid electric vehicle or a pure electric vehicle. The vehicle in this embodiment includes: a battery pack according to the second aspect embodiment. The first frame 220 in the battery pack includes a plurality of first sub-frames 221 distributed along a first direction, and adjacent first sub-frames 221 are movable relative to each other along the first direction. Therefore, during installation, each first sub-frame 221 can be individually positioned with the battery pack 100 in the first direction, thereby reducing the cumulative positional error of the connecting pieces 210 mounted on the first frame 220, reducing the installation error of the first frame 220, thereby reducing the processing accuracy and installation accuracy requirements of the connecting components 200, thus reducing the manufacturing cost of the battery pack, and consequently reducing the manufacturing cost of the vehicle in this embodiment.

[0068] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of this application. Furthermore, in the description of this application, the reference to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., means that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

Claims

1. Battery assembly, including: A battery pack, comprising multiple individual cells arranged along a first direction; The connecting component includes a first frame and a plurality of connecting pieces. The first frame includes a plurality of first sub-frames, which are distributed along a first direction and adjacent first sub-frames are movable relative to each other along the first direction. Each first sub-frame is connected to the connecting piece, which is connected to the individual battery cell to enable the individual battery cells to be electrically connected in series or in parallel.

2. The battery assembly according to claim 1, wherein, The adjacent first sub-frames are set up separately.

3. The battery assembly according to claim 1 or 2, wherein the battery assembly further comprises a plurality of first limiting members, and each first sub-frame is connected to at least one first limiting member; The single battery includes a casing and a terminal post. The casing has a first side and a second side. The terminal post is connected to the first side. The connecting assembly is located on the first side. The first limiting member abuts against at least one second side of the single battery to limit the relative position of the connecting assembly and the single battery.

4. The battery assembly according to claim 3, wherein, The single cell is a cylindrical cell, the second side is a cylindrical surface, and the first limiting member has an arc-shaped limiting surface adapted to the second side, the limiting surface abutting against the second side.

5. The battery assembly according to claim 3, wherein, The first limiting member and the first sub-frame are an integral structure; or... The first limiting member and the first sub-frame are separate structures.

6. The battery assembly according to any one of claims 1 to 5, the battery assembly further comprising a data acquisition component, the data acquisition component comprising a circuit board, the circuit board comprising a first telescopic portion and a plurality of sub-circuit boards, the plurality of sub-circuit boards being distributed along the first direction and electrically connected to the battery pack for acquiring parameter signals of the individual cells, the first telescopic portion being connected to adjacent sub-circuit boards and being capable of telescoping along the first direction.

7. The battery assembly according to claim 6, wherein, The circuit board is a flexible circuit board, which includes the sub-circuit boards and the first telescopic portion that are alternately connected along the first direction, and the first telescopic portion is a curved portion of the flexible circuit board that is bent along its own thickness direction.

8. The battery assembly according to claim 6 or 7, the battery assembly further comprising a second frame, the second frame comprising a plurality of second sub-frames, each second sub-frame being connected to one of the sub-circuit boards, and adjacent second sub-frames being movable relative to each other along the first direction.

9. Battery pack, including: The battery assembly according to any one of claims 1 to 8; The bottom shell has a receiving groove, and the battery assembly is located in the receiving groove; A cover plate is attached to the bottom shell and seals the receiving groove.

10. A vehicle comprising the battery pack of claim 9.

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