Battery assembly, battery pack and vehicle

Abstract

The utility model discloses a battery assembly, a battery pack and a vehicle, wherein the battery assembly comprises a battery pack and a connecting assembly; the battery pack comprises a plurality of single batteries which are arranged and distributed, and the battery pack extends along a first direction; the connecting assembly is connected to the battery pack, the connecting assembly comprises a first framework and a plurality of connecting pieces, the first framework comprises a plurality of first sub-frameworks, each first sub-framework is connected with the connecting pieces, the first sub-frameworks are distributed in the first direction, and the adjacent first sub-frameworks can relatively move in the first direction. And each first sub-framework can be independently positioned with the battery pack, so that accumulation of position errors of the connecting pieces and the single batteries is reduced, the requirements on processing precision and mounting precision of the battery pack are reduced, and the manufacturing cost of the battery pack is reduced. Therefore, when the battery assembly is used for the battery pack, the manufacturing cost of the battery pack can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery assembly, a battery pack and a vehicle. Background Art

[0002] Because a single battery has a relatively small energy storage capacity, its use in vehicles requires multiple cells connected in series and parallel to form a battery pack. In some technologies, a battery pack typically includes a connector assembly and a battery pack. The battery pack includes multiple arranged cells. The connector assembly includes multiple connector tabs, which are used to connect adjacent cells to allow for series or parallel connection. To facilitate assembly of the connector tabs, the connector assembly includes a frame, which connects the connector tabs to the frame to form an integrated structure. During assembly, the connector assembly can be attached to the battery pack, and then the connector tabs can be welded together.

[0003] However, to meet vehicle range requirements, the number of individual batteries is very large, and so are the number of connectors. Consequently, when the connector assembly is installed as a single piece, the positional errors between the connectors and the individual batteries accumulate. To ensure proper installation of the battery pack, the battery assembly must have high machining and installation precision, which increases the manufacturing cost of the battery pack. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery assembly that can be used in a battery pack to reduce the manufacturing cost of the battery pack.

[0005] The utility model also provides a battery pack including the above battery assembly.

[0006] The utility model also provides a vehicle comprising the battery pack.

[0007] A battery assembly according to an embodiment of the first aspect of the present invention includes: a battery pack and a connection assembly.

[0008] The battery pack includes a plurality of single cells arranged along a first direction, and the battery pack extends along the first direction; the connecting assembly includes a first skeleton and a plurality of connecting plates, the first skeleton includes a plurality of first sub-skeletons, the plurality of first sub-skeletons are distributed along the first direction, and adjacent first sub-skeletons can move relative to each other along the first direction, each of the first sub-skeletons is connected to a connecting plate, and the connecting plate is connected to the single cells for electrically connecting the single cells in series or in parallel.

[0009] The battery assembly according to the embodiment of the present invention has at least the following beneficial effects:

[0010] In this embodiment, the first skeleton of the connecting assembly includes multiple first sub-skeletons distributed along a first direction, and adjacent first sub-skeletons are capable of relative movement along this first direction. Therefore, during installation, each first sub-skeleton can be independently positioned relative to the battery pack in the first direction, thereby reducing the cumulative positional errors between the connecting tabs mounted on the first skeleton and the individual battery cells, lowering the machining and installation precision requirements for 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.

[0011] According to some embodiments of the present invention, adjacent first sub-frames are provided separately.

[0012] According to some embodiments of the present invention, the battery assembly also includes a plurality of first limiting members, and each first sub-skeleton is connected to at least one first limiting member; the single battery includes an outer shell and a pole, the outer shell has a first side surface and a second side surface, the pole is connected to the first side surface, the connecting assembly is located on the first side surface, the first limiting member is connected to the first sub-skeleton and abuts against the second side surface, for limiting the relative position of the connecting assembly and the single battery.

[0013] According to some embodiments of the present invention, the single battery is a cylindrical battery, the second side surface is a cylindrical surface, the first limiting member has an arc-shaped limiting surface adapted to the second side surface, and the limiting surface abuts against the second side surface.

[0014] According to some embodiments of the present invention, the battery assembly includes a second frame, the second frame includes a plurality of second sub-frames, and each of the second sub-frames is connected to one of the sub-circuit boards.

[0015] According to some embodiments of the present invention, the first position-limiting member and the first frame are an integrated structure; or, the first position-limiting member and the first frame are a separate structure.

[0016] According to some embodiments of the present invention, the battery assembly further includes a collection assembly, which includes a circuit board. The circuit board includes a first telescopic portion and multiple sub-circuit boards. The multiple sub-circuit boards are distributed along the first direction and connected to the battery pack for collecting parameter signals of the single cells. The first telescopic portion is connected to the adjacent sub-circuit boards and can be telescoped along the first direction.

[0017] According to some embodiments of the present invention, the circuit board is a flexible circuit board, which includes the sub-circuit boards and the first telescopic parts alternately connected along the first direction, and the first telescopic parts are bent parts of the flexible circuit board along its own thickness direction.

[0018] According to some embodiments of the present invention, the battery assembly includes a second skeleton, the second skeleton includes a plurality of second sub-skeletons, each of the second sub-skeletons is connected to a sub-circuit board, and adjacent second sub-skeletons can move relative to each other along the first direction.

[0019] A battery pack according to a second embodiment of the present invention includes a bottom shell, a cover plate, and several battery assemblies according to the first 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 covers the receiving groove.

[0020] The battery pack according to the embodiment of the present invention has at least the following beneficial effects:

[0021] In the battery assembly of the embodiment of the first aspect, the first skeleton of the battery assembly includes a plurality of first sub-skeletons distributed along the first direction, and adjacent first sub-skeletons are capable of relative movement along the first direction. Therefore, during installation, each first sub-skeleton can be independently positioned relative to the battery pack in the first direction, thereby reducing the cumulative positional errors between the connecting piece mounted on the first skeleton and the individual battery cells, lowering the machining and installation precision requirements of the battery assembly, thereby reducing the manufacturing cost of the battery pack, and further reducing the manufacturing cost of the battery pack of this embodiment.

[0022] A vehicle according to an embodiment of the third aspect of the present invention includes: the battery pack described in the embodiment of the second aspect.

[0023] The vehicle according to the embodiment of the present utility model has at least the following beneficial effects:

[0024] In a battery pack employing an embodiment of the second aspect, the first skeleton of the battery pack includes a plurality of first sub-skeletons distributed along the first direction, and adjacent first sub-skeletons are capable of relative movement along the first direction. Therefore, during installation, each first sub-skeleton can be independently positioned relative to the battery pack in the first direction, thereby reducing the cumulative positional errors between the connecting tabs mounted on the first skeleton and the individual battery cells, lowering the machining and installation precision requirements for the battery assembly, thereby reducing the manufacturing cost of the battery pack, and ultimately, the manufacturing cost of the vehicle of this embodiment.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic structural diagram of a battery assembly according to an embodiment of the first aspect of the present utility model;

[0028] Figure 2 for Figure 1 Schematic diagram of the structure of the connecting components;

[0029] Figure 3 for Figure 2 Magnified view of area A in the middle;

[0030] Figure 4 for Figure 2 Magnified view of area B in the middle;

[0031] Figure 5 It is a structural diagram of a single battery and a first limiting member;

[0032] Figure 6 for Figure 1 Schematic diagram of the acquisition component;

[0033] Figure 7 for Figure 6 Magnified view of area C in the middle;

[0034] Figure 8 This is a schematic structural diagram of a battery pack according to an embodiment of the second aspect of the present invention.

[0035] Reference numerals:

[0036] Battery assembly 1000;

[0037] Battery pack 100, single battery 110, housing 111, first side surface 1111, second side surface 1112, terminal 120;

[0038] Connecting assembly 200, connecting piece 210, first frame 220, first sub-frame 221, first limiting hole 2211;

[0039] First limiting member 300, limiting surface 310, connecting portion 320;

[0040] Collection component 400, circuit board 410, sub-circuit board 411, first telescopic portion 412, second frame 420, second sub-frame 421, second limiting hole 4211;

[0041] Flexible circuit board 500, bending portion 510;

[0042] The second limiting member 600 . DETAILED DESCRIPTION

[0043] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0045] In the description of this utility model, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of the terms "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] Because a single battery has a relatively small energy storage capacity, its use in vehicles requires multiple cells connected in series and parallel to form a battery pack. In some technologies, a battery pack typically includes a connector assembly and a battery pack. The battery pack includes multiple arranged cells. The connector assembly includes multiple connector tabs, which are used to connect adjacent cells to allow for series or parallel connection. To facilitate assembly of the connector tabs, the connector assembly includes a frame, which connects the connector tabs to the frame to form an integrated structure. During assembly, the connector assembly can be attached to the battery pack, and then the connector tabs can be welded together.

[0048] However, in order to meet the vehicle's endurance requirements, the number of single cells is very large, and the number of connecting plates will also be relatively large. Therefore, when the connecting assembly is installed as a whole, the positional errors between the connecting plates and the single cells will accumulate. The processing errors of the single cells, the installation errors of the single cells, the processing errors of the skeleton, the processing errors of the connecting plates, and the installation errors of the connecting plates will all result in positional errors between the connecting plates and the single cells. For example, the battery pack has a first end and a second end relative to each other in a first direction. During installation, the first end is used as a positioning reference. As the positional errors between the connecting plates and the single cells accumulate, the further away from the first end position the connecting plates are from the single cells, the greater the positional errors between the connecting plates and the single cells. In order to ensure the normal installation of the battery pack, the battery assembly needs to have high processing and installation accuracy, which increases the manufacturing cost of the battery pack.

[0049] In view of the above problems, the present invention proposes a battery assembly 1000 that can be used in a battery pack to reduce the manufacturing cost of the battery pack.

[0050] Reference Figures 1 to 3 , Figure 1 This is a schematic structural diagram of a battery assembly according to the first embodiment of the present utility model. Figure 2 for Figure 1 Schematic diagram of the structure of the connection components, Figure 3 for Figure 2 The enlarged view of area A in the middle shows the battery assembly 1000 of this embodiment, including: a battery pack 100 and a connection assembly 200.

[0051] The battery pack 100 includes a plurality of single cells 110 arranged and distributed along a first direction (eg Figure 1 The first direction is, for example, the length direction or width direction of the battery pack, and the single battery 110 is, for example, a square battery, a cylindrical battery or a blade battery. The connecting assembly 200 includes a first skeleton 220 and a plurality of connecting pieces 210 (such as Figure 2 As shown), the connecting piece 210 is a conductive structure such as a copper sheet or an aluminum sheet. The first skeleton 220 includes a plurality of first sub-skeletons 221, and the plurality of first sub-skeletons 221 are distributed along the first direction. The adjacent first sub-skeletons 221 are not connected to each other. Figure 3As shown), or adjacent first sub-skeletons 221 are connected by a second telescopic portion that can be telescoped along the first direction, so that adjacent first sub-skeletons 221 can move relative to each other along the first direction. Each first sub-skeleton 221 is connected to a connecting piece 210, and the connecting piece 210 is connected to the single cell 110, and is used to electrically connect the single cells 110 in series or in parallel. For example, taking a cylindrical battery as an example, the single cell 110 includes a shell 111 and a pole 120, wherein the shell 111 is connected to the internal anode as a negative electrode. When adjacent single cells 110 are connected in series, one end of the connecting piece 210 is connected to the pole 120 of one single cell 110, and the other end is connected to the shell 111 of the single cell 110. When adjacent batteries are connected in parallel, both ends of the connecting piece 210 are connected to the same electrodes of the two single cells 110, for example, both are connected to the shell 111 of the battery, or both are connected to the pole 120 of the battery. It should be noted that, in the embodiment, the connection between the single cells 110 is not limited to a single series connection or a single parallel connection. Some cells may be connected in series and some cells may be connected in parallel.

[0052] Specifically, in this embodiment, the first skeleton 220 in the connecting assembly 200 includes a plurality of first sub-skeletons 221 distributed along a first direction, and adjacent first sub-skeletons 221 are capable of relative movement along the first direction. Therefore, during assembly, each first sub-skeleton 221 can be independently positioned relative to the battery pack 100 in the first direction, thereby reducing the cumulative positional errors between the connecting tabs 210 mounted on the first skeleton 220 and the individual battery cells 110, lowering the machining and assembly precision requirements of the battery assembly 1000 and thereby 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.

[0053] Furthermore, in some embodiments, the first sub-skeleton 221 includes a plurality of first skeleton parts distributed along the second direction (perpendicular to the first direction), and adjacent first skeleton parts 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 the above-mentioned adjacent first sub-skeletons 221 being able to move relative to each other along the first direction, and will not be repeated here.

[0054] Reference Figure 3In some embodiments, adjacent first sub-frames 221 are provided separately. Specifically, 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 tabs 210 connected to the first sub-frames 221 together constitute a sub-connection assembly, thereby making the connection assembly 200 comprise multiple relatively independent sub-connection assemblies. Therefore, during installation, each sub-connection assembly can be installed separately. Specifically, the thin, large-area structure of the connection assembly 200 is not only prone to significant error accumulation during installation, but also prone to deformation during transportation. This embodiment effectively alleviates this problem by dividing the large-area connection assembly 200 into multiple smaller sub-connection assemblies, allowing each sub-connection assembly to be transported and positioned separately. This not only reduces the risk of deformation of the connection assembly 200 during transportation, but also reduces the accumulation of errors during installation, thereby improving the positioning accuracy of each connecting tab 210 and lowering the processing and installation precision requirements of the battery assembly 1000.

[0055] In addition, it should be noted that since the first sub-skeleton 221 of this embodiment is a split structure, it can not only move independently in the first direction, but also move independently in the second direction, further reducing the processing difficulty of the battery assembly 1000, thereby reducing the manufacturing cost of the battery assembly 1000.

[0056] Reference Figures 3 to 5 , Figure 4 for Figure 2 Magnified view of area B in the middle, Figure 5 Schematic diagram of the structure of the single battery and the first limiter. In some embodiments, the battery assembly 1000 further includes a plurality of first limiters 300, and each first sub-frame 221 is connected to at least one first limiter 300 (such as Figure 3 and Figure 4 The single battery 110 includes a housing 111 and a pole 120. The housing 111 has a first side surface 1111 and a second side surface 1112. The pole 120 is connected to the first side surface 1111. The connecting assembly 200 is located on the first side surface 1111 of the single battery 110. The first stopper 300 is connected to the first sub-frame 221 and abuts against the second side surface 1112 (as shown in FIG. Figure 5 shown).

[0057] Specifically, it is understood that to ensure a high energy density for the single cell 110, the terminal 120 protrudes from the housing 111 to a smaller extent. Therefore, when the first frame 220 is positioned on the first side surface 1111, the space between the first frame 220 and the first side surface 1111 is relatively small. If the terminal 120 is used as a positioning structure on the single cell 110, the first retaining member 300 needs to be located between the first side surface 1111 and the first frame 220. This not only increases the difficulty of installing the retaining structure but also increases the difficulty of machining the first retaining member 300. Specifically, due to the narrow space between the first frame 220 and the first side surface 1111, it is difficult to observe and position the retaining member during installation, hindering assembly. If the first retaining member 300 is too thick, it will lift up the first frame 220, causing the connecting piece 210 to separate from the single cell 110. If the first retaining member 300 is too thin, it can easily lead to positioning failure. The present embodiment can effectively improve this problem. The first limit member 300 of the present embodiment abuts against the second side surface 1112, so that the installation of the first limit member 300 and the installation of the first skeleton 220 in the direction of the battery pack 100 of the connecting component 200 do not interfere with each other. Therefore, the size of the first limit member is not limited by the distance between the first sub-skeleton 221 and the first side surface 1111, thereby reducing the processing requirements of the first limit member 300 and thus reducing the manufacturing cost.

[0058] Reference Figure 5 In some embodiments, the single battery cell 110 is a cylindrical battery, the second side surface 1112 is a cylindrical surface, and the first stopper 300 has an arc-shaped stopper surface 310 that matches the second side surface 1112, with the stopper surface 310 abutting the second side surface 1112. Specifically, it is understood that the stopper surface 310 is a concave surface that can limit the displacement of the first sub-frame 221 and the battery pack 100 in multiple directions. For example, the battery pack 100 also has a set width, and the first stopper 300 is engaged with the cylindrical surface of the single battery cell 110 via the concave stopper surface 310. This not only allows the first frame 220 and the battery pack 100 to be positioned in the first direction, but also allows the first sub-frame 221 and the battery pack 100 to be positioned in the battery width direction. This simplifies the structure of the battery assembly 1000 of this embodiment and reduces the processing cost of the battery assembly 1000.

[0059] Based on the above embodiments, the first limiting member 300 and the first sub-skeleton 221 are an integrated structure. For example, the first limiting member 300 and the first sub-skeleton 221 are an integrated structure formed by processes such as 3D printing, machining or injection molding. This not only omits the installation steps between the first sub-skeleton 221 and the first limiting member 300 to save assembly costs, but also eliminates the installation error between the first limiting member 300 and the first sub-skeleton 221 to improve the installation accuracy between the first sub-skeleton 221 and the battery pack 100.

[0060] Reference Figure 4 In some embodiments, the first position limiting member 300 and the first sub-skeleton 221 are split structures. For example, the first position limiting member 300 and the first sub-skeleton 221 are connected by a snap connection, a threaded connection, or a screw connection to form a split structure. Therefore, during processing, the first sub-skeleton 221 and the first position limiting member 300 can be processed separately, thereby reducing the processing cost of the connection assembly 200. Exemplarily, the dimension of the first sub-skeleton 221 and the first position limiting member 300 in the thickness direction of the battery pack 100 is L. If the first sub-skeleton 221 and the first position limiting member 300 are formed by processing the same piece of parent material, the thickness of the parent material is at least L. However, since each first sub-skeleton 221 is only provided with one, two, or three first position limiting members 300, a large amount of material needs to be removed from the parent material during processing, resulting in material waste. Furthermore, it is understood that even if the first frame 220 is divided into a plurality of first sub-frames 221, it still has a relatively large area. Therefore, when the first position-limiting member 300, which has a relatively complex structure, is directly processed on the first sub-frame 221, it is relatively troublesome to fix the first sub-frame 221. In this embodiment, the first sub-frame 221 and the first position-limiting member 300 are provided with a split structure, which allows the first sub-frame 221 and the first position-limiting member 300 to be processed separately, which can effectively improve this problem and reduce processing costs.

[0061] The first limiting member 300, for example, includes a connecting portion 320, and the first sub-skeleton 221 has a first limiting hole 2211. The connecting portion 320 is inserted into the first limiting hole 2211, and 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-skeleton 221, so as to improve the position accuracy between the first limiting member 300 and the first sub-skeleton 221.

[0062] Reference Figure 1 , Figure 6 and Figure 7 , Figure 6 for Figure 1 Schematic diagram of the acquisition component, Figure 7 for Figure 6In the enlarged view of the middle C area, in some embodiments, the battery assembly 1000 further includes a collection assembly 400, which includes a circuit board 410. The circuit board 410 is, for example, 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 the first direction (e.g., Figure 6 As shown), and electrically connected to the battery pack 100, for collecting parameter signals of the single battery 110, the parameter signals include, for example, voltage, current, temperature or capacitance, etc., the first telescopic portion 412 is, for example, a flexible wire row, a cable or a conductive metal sheet, etc. for a conductive connection structure, the first telescopic portion 412 is connected to the adjacent sub-circuit board 411 (as shown Figure 7 As shown), the first telescopic portion 412 can be telescoped along the first direction so that adjacent sub-circuit boards 411 can move relative to each other along the first direction.

[0063] Specifically, the acquisition assembly 400 is used to collect parameter signals from the individual cells 110. The circuit board 410 includes multiple connection points. If the circuit board 410 were a conventional circuit board, the connection points far from the positioning points would accumulate errors, resulting in increased positional errors. In this example, however, adjacent sub-circuit boards 411 are relatively movable in a first direction. Therefore, during the installation of the circuit boards 410, the positioning of each sub-circuit board 411 relative to the battery pack 100 is independent of each other. This reduces the accumulation of positional errors between the circuit boards 410 and the individual cells 110 during installation, thereby reducing the processing requirements and costs of the battery assembly 1000.

[0064] Furthermore, the sub-circuit board 411 includes a board body and a third telescopic portion alternately connected along the second direction. The third telescopic portion can be telescopic along the second direction. The specific principle is similar to that of the first telescopic portion 412 and will not be repeated here.

[0065] Reference Figure 7 Based on the above embodiment, the circuit board 410 is a flexible circuit board 500, which includes sub-circuit boards 410 and first telescopic portions 412 alternately connected along a first direction. The first telescopic portion 412 is a bent portion 510 of the flexible circuit board 500 bent along its own thickness direction. There is no need to provide an additional structure to form the first telescopic portion 412, thereby making the structure of the circuit board 410 simpler and reducing the number of 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.

[0066] Reference Figure 6 and Figure 7In addition to the above embodiment, the collection assembly 400 further includes a second skeleton 420, which comprises multiple second sub-skeletons 421. Each second sub-skeleton 421 is connected to a sub-circuit board 411. This improves the overall structural stability of the collection assembly 400 and prevents deformation or damage due to external forces during transportation, installation, and use. Furthermore, the flexible circuit board 500 is connected to the second skeleton 420, which improves the positional accuracy of each connection point on the flexible circuit board 500, making the installation of the battery assembly 1000 of this embodiment more convenient. Adjacent second sub-skeletons 421 are capable of relative movement along the first direction to ensure the flexibility of the flexible circuit board 500 in the first direction.

[0067] 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. The specific principles are similar to those of the first telescopic portion described above and will not be further described here. Correspondingly, the second sub-frame 421 includes multiple second frame portions distributed along the second direction, each second frame portion connected to a plate body. Furthermore, 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 thickness direction.

[0068] Reference Figure 4 and Figure 6 In some embodiments, the battery assembly 1000 further includes a second limiting member 600 , which is connected to the first sub-skeleton 221 and the second sub-skeleton 421 and is used for positioning between the second sub-skeleton 421 and the first sub-skeleton 221 to achieve positioning of the flexible circuit board 500 . Furthermore, in some embodiments, the collection component 400 is located on the side of the connecting component 200 facing away from the battery pack 100, the first sub-skeleton 221 has a first limiting hole 2211 passing through it, the first limiting member 300 has a connecting portion 320, the connecting portion 320 is passed through the first limiting hole 2211, and protrudes from the first sub-skeleton 221 toward the collection component 400, the part of the connecting portion 320 protruding from the first sub-skeleton 221 toward the collection component 400 forms a second limiting member 600, the second sub-skeleton 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 collection component without the need to additionally set up other components to serve as the second limiting member 600, thereby making the structure of the battery assembly 1000 of this embodiment simpler and reducing manufacturing costs.

[0069] Reference Figure 8 , Figure 8This is a schematic structural diagram of a battery pack according to an embodiment of the second aspect of the present invention. The battery pack according to the embodiment of the second aspect of the present invention comprises: a bottom shell, a cover plate, and several battery assemblies 1000 according to the embodiment of the first aspect. The bottom shell has a receiving groove, and the battery assembly 1000 is located in the receiving groove. The cover plate is connected to the bottom shell and covers the receiving groove. Among them, the first skeleton 220 in the battery assembly 1000 includes a plurality of first sub-skeletons 221 distributed along a first direction, and adjacent first sub-skeletons 221 can move relative to each other along the first direction. Therefore, during installation, in the first direction, each first sub-skeleton 221 can be positioned independently with respect to the battery pack 100, thereby reducing the cumulative position error of the connecting piece 210 installed on the first skeleton 220, thereby reducing the installation error of the first skeleton 220, thereby reducing the processing accuracy and installation accuracy requirements of the connecting assembly 200, thereby reducing the manufacturing cost of the battery pack 100, and further reducing the manufacturing cost of the battery pack of this embodiment.

[0070] It should be noted that this embodiment adopts all the technical features of the battery pack 100 of the first embodiment, so this embodiment has all the beneficial effects brought by the first embodiment, which will not be repeated here.

[0071] According to the vehicle of the third embodiment of the present utility model, the vehicle can be a private car, such as a sedan, SUV, MPV or pickup truck. The vehicle can also be an operating vehicle, such as a van, bus, small truck or large trailer. The vehicle can be a hybrid vehicle or a pure electric vehicle. The vehicle of this embodiment includes: the battery pack of the second embodiment. The first skeleton 220 in the battery pack includes a plurality of first sub-skeletons 221 distributed along the first direction, and adjacent first sub-skeletons 221 can move relative to each other along the first direction. Therefore, during installation, in the first direction, each first sub-skeleton 221 can be positioned separately from the battery pack 100, thereby reducing the accumulation of position errors of the connecting piece 210 installed on the first skeleton 220, so as to reduce the installation error of the first skeleton 220, thereby reducing the processing accuracy and installation accuracy requirements of the connecting assembly 200, thereby reducing the manufacturing cost of the battery pack, and further reducing the manufacturing cost of the vehicle of this embodiment.

[0072] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, in the description of the present invention, the reference terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" are intended to mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples.

Claims

1. A battery assembly, characterized in that include: A battery pack comprising a plurality of single batteries arranged along a first direction; A connecting component includes a first skeleton and multiple connecting plates. The first skeleton includes multiple first sub-skeletons. The multiple first sub-skeletons are distributed along the first direction, and adjacent first sub-skeletons can move relative to each other along the first direction. Each first sub-skeleton is connected to the connecting plate, and the connecting plate is connected to the single cell to electrically connect the single cells in series or in parallel.

2. The battery assembly according to claim 1, wherein: Adjacent first sub-frames are separately arranged.

3. The battery assembly according to claim 1, wherein: The battery assembly further includes a plurality of first limiting members, and each of the first sub-frames is connected to at least one of the first limiting members; The single cell includes a shell and a pole, the shell has a first side surface and a second side surface, the pole is connected to the first side surface, the connecting assembly is located on the first side surface, and the first limiting member abuts against the second side surface of at least one of the single cells to limit the relative position of the connecting assembly and the single cell.

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

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

6. The battery assembly according to any one of claims 1 to 5, characterized in that: The battery assembly also includes a collection assembly, which includes a circuit board. The circuit board includes a first telescopic portion and multiple sub-circuit boards. The multiple sub-circuit boards are distributed along the first direction and are electrically connected to the battery pack for collecting parameter signals of the single cells. The first telescopic portion is connected to the adjacent sub-circuit boards and can be telescoped along the first direction.

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

8. The battery assembly according to claim 7, characterized in that The battery assembly includes a second frame, the second frame includes a plurality of second sub-frames, each of the second sub-frames is connected to one of the sub-circuit boards, and adjacent second sub-frames can move relative to each other along the first direction.

9. A battery pack, characterized in that: include; 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; The cover plate is connected to the bottom shell and covers the accommodating groove.

10. A vehicle, characterized in that Including the battery pack according to claim 9.

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