Battery cell assembly, battery module and battery pack

Abstract

The utility model belongs to the technical field of power batteries, and particularly relates to a battery cell assembly, a battery module and a battery pack. The battery cell assembly comprises a battery cell group; the connector is provided with a plurality of interfaces, and the plurality of interfaces are arranged in two layers in parallel to form an upper layer interface group and a lower layer interface group; the flexible circuit board is provided with an output end and an input end electrically connected with the battery cell group, the output end comprises a first output structure connected with the upper-layer interface group and a second output structure connected with the lower-layer interface group, and the first output structure is provided with a first bending structure; the first output structure is reversed through the first bending structure so as to correspond to and be connected with the sequence of the plurality of interfaces of the upper-layer interface group; and / or the second output structure is provided with a second bending part, and the second output structure is reversed through the second bending part so as to correspond to and be connected with the sequence of the plurality of interfaces of the lower-layer interface group. The flexible circuit board can change the sequence of the etching lines in the output connecting end so as to be matched with the sequence of the interfaces on the connector, thereby facilitating structure simplification and cost reduction.

Description

Technical Field

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

[0002] Currently, in the power system of new energy vehicles, the collected voltage signals of the battery cells are transmitted to the battery management system (BMS) for diagnosis and control through a flexible printed circuit (FPC). To facilitate the collection of the voltage of the battery cells, the input end of the flexible circuit board is connected to the corresponding battery cells through multiple sampling elements, and the output end of the flexible circuit board is connected to the interface of the connector of the battery management system. Since the connector needs to be compatible with the sampling requirements of different battery modules, the interface of the connector is generally set according to the voltage sequence of the battery cells and cannot be changed according to the voltage difference of the battery cells. In order to avoid internal wiring crossing and to correspond to the interface of the connector at the same time, the output end of the flexible circuit board generally needs to be connected through an additional wiring harness, which not only makes the structure more complicated but also increases the cost. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a battery cell assembly, a battery module and a battery pack to solve the problem of difficulty in corresponding connection between the interface connection of the flexible circuit board and the connector in the prior art, so as to simplify the structure and reduce costs.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a battery cell assembly, comprising:

[0005] Battery cell pack;

[0006] A connector having a plurality of interfaces, wherein the plurality of interfaces are juxtaposed in two layers to form an upper layer interface group and a lower layer interface group;

[0007] A flexible circuit board having an input end and an output end, the input end being electrically connected to the battery cell group, the output end including a first output structure and a second output structure, the first output structure being connected to the upper interface group, and the second output structure being connected to the lower interface group;

[0008] Wherein, the first output structure has a first bending portion, and the output connection end of the first output structure is reversed through the first bending portion to correspond to and be connected with the order of the multiple interfaces of the upper interface group; and / or, the second output structure has a second bending portion, and the output connection end of the second output structure is reversed through the second bending portion to correspond to and be connected with the order of the multiple interfaces of the lower interface group.

[0009] Optionally, the battery cell group includes a plurality of battery cells stacked and arranged in sequence, and the input end includes a first input structure and a second input structure, the first input structure connects the first output structure and the odd-numbered battery cells among the plurality of battery cells, and the second input structure connects the second output structure and the even-numbered battery cells among the plurality of battery cells.

[0010] Optionally, the first input structure and the second input structure are an integrated structure.

[0011] Optionally, the first input structure and the second input structure are split structures, and at least partially overlap and are adhesively fixed.

[0012] Optionally, the first bending portion includes a first bend and a second bend distributed sequentially from the input connection end to the output connection end of the first output structure, the input connection end of the first output structure is connected to the first input structure and is located at the top of the battery cell group, the output connection end of the first output structure is reversed through the first bend and extends along the height direction of the battery cell group to be located on the same side of the battery cell group as the connector, and the output connection end of the first output structure is reversed through the second bend and extends along the length direction of the battery cell group to be connected to the upper interface group.

[0013] Optionally, the first bending portion also includes a third bend and a fourth bend, the third bend and the fourth bend are located between the first bend and the second bend, and are successively away from the first bend, the output connection end of the first output structure is reversed through the third bend and extends along the width direction of the battery cell group to approach the connector, and the output connection end of the first output structure is reversed through the fourth bend and extends along the height direction of the battery cell group to be aligned with the upper interface group in the height direction of the battery cell group.

[0014] Optionally, a portion of the output connection end of the first output structure is bent 180° toward the battery cell group to form the third bend, and the angle formed between the third bend and the inner side of the first output structure is 45°; a portion of the output connection end of the first output structure is bent 180° away from the battery cell group to form the fourth bend, and the angle formed between the fourth bend and the inner side of the first output structure is 45°.

[0015] Optionally, the second bending portion includes a fifth bend, a sixth bend, a seventh bend and an eighth bend distributed in sequence from the input connection end to the output connection end of the second output structure, the input connection end of the second output structure is connected to the second input structure and is located at the top of the battery cell group, the output connection end of the second output structure is reversed through the fifth bend and extends along the height direction of the battery cell group to be located on the same side of the battery cell group as the connector, the output connection end of the first output structure is reversed through the sixth bend and extends along the width direction of the battery cell group to be close to the connector, the output connection end of the second output structure is reversed through the seventh bend to change the order of the internal etching lines of the output connection end of the second output structure and correspond to the order of the multiple interfaces of the lower interface group, and the output connection end of the second output structure is reversed through the eighth bend and extends along the length direction of the battery cell group to be connected to the lower interface group.

[0016] Optionally, a portion of the output connection end of the second output structure is bent 180° toward the battery cell group to form the sixth bend, and the angle formed between the sixth bend and the inner side of the second output structure is 135°. A portion of the output connection end of the second output structure is bent 180° toward the battery cell group to form the seventh bend, and the angle formed between the seventh bend and the inner side of the second output structure is 45°.

[0017] Optionally, the second bending portion also includes a ninth bend located between the seventh bend and the eighth bend, and the output connection end of the second output structure is reversed through the ninth bend and extends along the height direction of the battery cell group to be aligned with the lower interface group in the height direction of the battery cell group.

[0018] Optionally, the output connection end of the first output structure and the output connection end of the second output structure partially overlap in the height direction of the battery cell group, and the overlapping portion is bonded and fixed.

[0019] Optionally, a first foam is provided on the first output structure, and the first foam is located on the inner side of the first bending portion; and a second foam is provided on the second output structure, and the second foam is located on the inner side of the second bending portion.

[0020] To achieve the above-mentioned purpose and other related purposes, the present application also provides a battery module, including the battery cell assembly described above.

[0021] To achieve the above-mentioned objectives and other related objectives, the present application also provides a battery pack comprising the battery cell assembly described above.

[0022] As described above, the battery cell assembly, battery module and battery pack of the present invention have at least the following beneficial effects: the flexible circuit board changes the order of the etched lines in the output connection terminal through the first bending portion and / or the second bending portion, so that the order of the etched lines in the output connection terminal can match the order of the interfaces on the connector, so that the etched lines inside the flexible circuit board do not need to be cross-arranged to achieve reversal, and there is no need to set up additional wiring harnesses to achieve reversal switching, which is conducive to simplifying the structure and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a partial structural diagram of an embodiment of a battery cell assembly of the present utility model;

[0024] Figure 2 This is a partial explosion diagram of an embodiment of a battery cell assembly of the present invention;

[0025] Figure 3 for Figure 1 A top view of the battery cell assembly;

[0026] Figure 4 for Figure 1 A schematic diagram showing the arrangement of the multiple interfaces of the connector and the output connection terminals of the flexible circuit board;

[0027] Figure 5 for Figure 1 A schematic structural diagram of the first input structure and the first output structure of the flexible circuit board;

[0028] Figure 6 for Figure 1 A schematic structural diagram of the second input structure and the second output structure of the flexible circuit board;

[0029] Figure 7 for Figure 5 Schematic diagram of the structure of the flexible circuit board after flattening.

[0030] Part Number Description

[0031] Battery cell group 1, battery cell 11, battery management system 2, connector 21, upper interface group 211, lower interface group 212, interface 213, flexible circuit board 3, first output structure 31, first bend 311, second bend 312, third bend 313, fourth bend 314, second output structure 32, fifth bend 321, sixth bend 322, seventh bend 323, eighth bend 324, ninth bend 325, first input structure 33, second input structure 34, nickel sheet 35, blister isolation plate 4. DETAILED DESCRIPTION

[0032] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0033] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0034] See also Figures 1 to 3 In some optional embodiments, the present application provides a battery cell assembly, which includes a battery cell group 1, a battery management system 2, and a flexible circuit board 3. In addition to the above components, the battery cell assembly may also include a blister isolation plate 4. The battery management system 2 includes a connector 21, which has multiple interfaces 213. The multiple interfaces 213 are arranged in two layers to form an upper interface group 211 and a lower interface group 212. The upper interface group 211 and the lower interface group 212 are arranged along the height direction of the battery cell group 1. The upper interface group 211 and the lower interface group 212 each have multiple interfaces 213 arranged side by side along the width direction of the battery cell group 1. The flexible circuit board 3 has an input end and an output end. The input end is electrically connected to the battery cell group 1. The output end includes a first output structure 31 and a second output structure 32. The first output structure 31 is connected to the upper interface group 211, and the second output structure 32 is connected to the lower interface group 212. Among them, the first output structure 31 has a first bending portion, and the output connection end of the first output structure 31 is reversed through the first bending portion to correspond to and connect with the order of multiple interfaces 213 of the upper interface group 211; and / or, the second output structure 32 has a second bending portion, and the output connection end of the second output structure 32 is reversed through the second bending portion to correspond to and connect with the order of multiple interfaces 213 of the lower interface group 212.

[0035] Optionally, the battery cell group 1 includes a plurality of battery cells 11 stacked and arranged in sequence, and the input end includes a first input structure 33 and a second input structure 34. The first input structure 33 extends along the stacking direction of the plurality of battery cells 11 and connects the first output structure 31 and the odd-numbered battery cells among the plurality of battery cells 11. The second input structure 34 extends along the stacking direction of the plurality of battery cells 11 and connects the second output structure 32 and the even-numbered battery cells among the plurality of battery cells 11. The first input structure 33 is welded and fixed to the tabs of the odd-numbered battery cells through a plurality of nickel sheets 35 to collect voltage signals corresponding to the odd-numbered battery cells. The second input structure 34 is welded and fixed to the tabs of the even-numbered battery cells through a plurality of nickel sheets 35 to collect voltage signals corresponding to the even-numbered battery cells. The order of the nickel sheets 35 matches the order of the corresponding connected battery cells 11, that is, the nickel sheets 35 corresponding to the odd-numbered battery cells are ordered in odd numbers, and the nickel sheets 35 corresponding to the even-numbered battery cells are ordered in even numbers. For example, multiple battery cells 11 are sequentially arranged as V0, V1, V2, ..., V13, and the nickel sheets 35 corresponding to each battery cell 11 are sequentially arranged as V0, V1, V2, ..., V13. In this application, the stacking direction of the multiple battery cells 11, the width direction of the battery cells 11, and the length direction of the battery cell group 1 are the same, i.e., the X direction in the drawings; the length direction of the battery cells 11 and the width direction of the battery cell group 1 are the same, i.e., the Y direction in the drawings; and the height direction of the battery cells 11 and the height direction of the battery cell group 1 are the same, i.e., the Z direction in the drawings.

[0036] Optionally, the blister isolation plate 4 is located on the top of the battery cell group 1 and insulates at least a portion of the flexible circuit board 3 from the battery cell group 1 .

[0037] Optionally, the first input structure 33 and the second input structure 34 are integrally formed, that is, the first input structure 33 and the second input structure 34 are each part of the input end of the same flexible circuit board 3, which helps save materials and reduce costs. For example, when the number of battery cells 11 in the battery pack 1 is small, there is sufficient space at the top of the battery pack 1. The etching lines of the first input structure 33 and the etching lines of the second input structure 34 can be laid flat between the two layers of insulating film without crossing each other. The first output structure 33 and the second output structure 32 adopt an integral structure and can share the insulating film, which helps save substrate. Specifically, during the manufacturing process, the first input structure 33, the second input structure 34, the first output structure 31, and the second output structure 32 are combined into a flexible circuit board 3. Before bending, the output end of the flexible circuit board 3 is cut to separate the first output structure 31 and the second output structure 32.

[0038] Optionally, the first input structure 33 and the second input structure 34 are separate structures that at least partially overlap and are secured via double-sided adhesive tape. The first input structure 33 and the second input structure 34 are independently provided, while the first output structure 31 and the second output structure 32 are independently provided. In other words, the first input structure 33 and the first output structure 31 can form one flexible circuit board 3, while the second input structure 34 and the second output structure 32 can form another flexible circuit board 3. The first input structure 33 and the second input structure 34 are separately provided and partially overlap, which helps save installation space. After being glued and secured, the first and second input structures 33, 34 can be heat-riveted to the blister isolation plate 4, which helps ensure the flatness of the first and second input structures 33, 34.

[0039] In the battery cell assembly of the above embodiment, the flexible circuit board 3 has a first bending portion and a second bending portion so that the output connection end of the flexible circuit board 3 can be bent and reversed to achieve the reversal of the internal etching line sequence of the flexible circuit board 3, without the need for switching through an additional wiring harness, which is beneficial to reducing assembly processes and costs; in addition, the first output structure 31 and the second output structure 32 of the flexible circuit board 3 can be flexibly reversed according to needs to change the voltage sequence, which is beneficial to adapt to the sequence of the interface 213 of the connector 21, thereby improving the adaptability and compatibility of the flexible circuit board 3 and the connector 21.

[0040] See also Figures 1 to 5 and Figure 7 In some optional embodiments, the first bending portion includes a first bend 311 and a second bend 312 distributed sequentially from the input connection end to the output connection end of the first output structure 31. The input connection end of the first output structure 31 is connected to the first input structure 33 and is located at the top of the battery cell group 1. The output connection end of the first output structure 31 is reversed through the first bend 311 and extends along the height direction of the battery cell group 1 so as to be located on the same side of the battery cell group 1 as the connector 21. The output connection end of the first output structure 31 is reversed through the second bend 312 and extends along the length direction of the battery cell group 1 to be connected to the upper interface group 211.

[0041] Optionally, the first bending portion also includes a third bend 313 and a fourth bend 314, and the third bend 313 and the fourth bend 314 are located between the first bend 311 and the second bend 312, and are successively away from the first bend 311. The output connection end of the first output structure 31 is reversed by the third bend 313 and extends along the width direction of the battery cell group 1 to approach the connector 21. The output connection end of the first output structure 31 is reversed by the fourth bend 314 and extends along the height direction of the battery cell group 1 to be aligned with the upper interface group 211 in the height direction of the battery cell group 1.

[0042] Optionally, a portion of the output connection end of the first output structure 31 is bent 180° toward the battery cell group 1 to form a third bend 313. The angle formed between the third bend 313 and the inner side of the first output structure 31 is 45°. The inner side of the first output structure 31 refers to the side of the first output structure 31 close to the second output structure 32.

[0043] Optionally, a portion of the output connection end of the first output structure 31 is bent 180° away from the battery cell group 1 to form a fourth bend 314 , and an angle formed between the fourth bend 314 and the inner side of the first output structure 31 is 45°.

[0044] In the battery cell assembly of the above embodiment, the output connection end of the first output structure 31 is flexibly reversed through the first bending portion so that it can be plugged into the interface 213 of the upper interface group 211, which is beneficial to reducing the requirements for installation space and improving the compatibility of the connector 21.

[0045] See also Figures 1 to 4 、 Figure 6 and Figure 7 In some optional embodiments, the second bend portion includes a fifth bend 321, a sixth bend 322, a seventh bend 323, and an eighth bend 324, which are distributed sequentially from the input connection end to the output connection end of the second output structure 32. The input connection end of the second output structure 32 is connected to the second input structure 34 and is located at the top of the battery cell group 1. The output connection end of the second output structure 32 is reversed by the fifth bend 321 and extends along the height direction of the battery cell group 1 so as to be located on the same side of the battery cell group 1 as the connector 21. The output connection end of the first output structure 31 is reversed by the sixth bend 322 and extends along the width direction of the battery cell group 1 to approach the connector 21. The output connection end of the second output structure 32 is reversed by the seventh bend 323 to change the order of the internal etching lines of the output connection end of the second output structure 32 and correspond to the order of the multiple interfaces 213 of the lower interface group 212. The output connection end of the second output structure 32 is reversed by the eighth bend 324 and extends along the length direction of the battery cell group 1 to be connected to the lower interface group 212.

[0046] Optionally, a portion of the output connection end of the second output structure 32 is bent 180° toward the battery cell group 1 to form a sixth bend 322, with the sixth bend 322 and the inner side of the second output structure 32 forming an angle of 135°. A portion of the output connection end of the second output structure 32 is bent 180° toward the battery cell group 1 to form a seventh bend 323, with the seventh bend 323 and the inner side of the second output structure 32 forming an angle of 45°. The inner side of the second output structure 32 refers to the side of the second output structure 32 that is close to the first output structure 31.

[0047] Optionally, the second bending portion also includes a ninth bend 325 located between the seventh bend 323 and the eighth bend 324, and the output connection end of the second output structure 32 is reversed through the ninth bend 325 and extends along the height direction of the battery cell group 1 to be aligned with the lower interface group 212 in the height direction of the battery cell group 1.

[0048] In the battery cell assembly of the above embodiment, the output connection end of the second output structure 32 is flexibly reversed through the second bending portion so that it can be plugged into the interface 213 of the lower interface group 212, which is beneficial to reducing the requirements for installation space and improving the compatibility of the connector 21.

[0049] See also Figures 3 to 7 In some optional embodiments, the internal etching line sequence of the output connection terminal of the first output structure 31 and the internal etching line sequence of the output connection terminal of the second output structure 32 can be reversed as needed. For example, in this embodiment, the internal etching line sequence of the output connection terminal of the first output structure 31 is the same as the internal etching line sequence of the first input structure 33, and the internal etching line sequence of the output connection terminal of the second output structure 32 is opposite to the internal etching line sequence of the second input structure 34. Specifically, the multiple interfaces 213 of the upper interface group 211 of the connector 21 are sequentially arranged as V1, V3, V5, V7, V9, V11 and V13 from left to right, and the multiple interfaces 213 of the lower interface group 212 are sequentially arranged as V0, V2, V4, V6, V8, V10 and V12 from left to right. The internal etching lines of the first input structure 33 are sequentially arranged as V1, V3, V5, V7, V9, V11 and V13 from left to right, corresponding to the order of the interfaces 213 of the upper interface group 211. The internal etching lines of the output connection end of the first output structure 31 do not need to be arranged in reverse order. The output connection end of the first output structure 31 is adjusted in position by the first bending portion to align with the interface 213 of the upper interface group 211 for plugging. That's it; the internal etching lines of the second input structure 34 are sorted from left to right as V12, V10, V8, V6, V4, V2 and V0, which is opposite to the sorting of the interface 213 of the lower interface group 212. The internal etching lines of the output connection end of the second output structure 32 need to be sorted in reverse order to match the sorting of the interface 213 of the lower interface group 212. The output connection end of the second output structure 32 adjusts its position by reversing the second bending portion and makes the internal etching lines of the output connection end of the second output structure 32 sorted from left to right as V0, V2, V4, V6, V8, V10 and V12, thereby achieving the matching of the internal etching line sorting of the output connection end of the second output structure 32 with the sorting of the interface 213 of the lower interface group 212.

[0050] See also Figure 1 、 Figure 5 and Figure 6In some optional embodiments, the output connection end of the first output structure 31 and the output connection end of the second output structure 32 partially overlap in the height direction of the battery cell group 1, and the overlapping portion is fixed by double-sided tape.

[0051] Optionally, a portion between the second bend 312 and the fourth bend 314 of the first output structure 31 overlaps with a portion between the eighth bend 324 and the ninth bend 325 of the second output structure 32 .

[0052] In the battery cell assembly of the above embodiment, the output connection end of the first output structure 31 and the output connection end of the second output structure 32 partially overlap and are fixed. The layout is compact and can correspond to the arrangement position of the upper interface group 211 and the lower interface group 212, which is conducive to improving space utilization and improving the stability of the overall structure.

[0053] See also Figure 1 、 Figure 2 and Figure 5 In some optional embodiments, a first foam is provided on the first output structure 31, and the first foam is located on the inner side of the first bend. The inner side of the first bend includes the inner sides of each bend of the first bend. Each bend of the first bend has a first side and a second side that are opposite to each other. The surface area of ​​the first side is smaller than the surface area of ​​the second side. The first side forms the inner side of the bend. As can be seen, the inner side of the first bend changes with the bending direction of each bend. Arranging the first foam on the inner side of the first bend helps cushion the first bend during bending, reducing the folding stress at the bend and reducing the risk of bending damage to the first output structure 31.

[0054] Optionally, the first foam covers at least the first bend 311, the second bend 312, the third bend 313, and the fourth bend 314 of the first bend portion. Furthermore, the inner side of the first bend portion includes the inner side of the first bend 311, the inner side of the second bend 312, the inner side of the third bend 313, and the inner side of the fourth bend 314.

[0055] See also Figure 1 、 Figure 2 and Figure 6 In some optional embodiments, the second output structure 32 is provided with a second foam, located on the inner side of the second bend. The inner side of the second bend includes the inner sides of each bend of the second bend. Each bend of the second bend has a first side and a second side that are opposite to each other. The surface area of ​​the first side is smaller than that of the second side, and the first side forms the inner side of the bend. As can be seen, the inner side of the second bend changes with the bending direction of each bend. The placement of the second foam on the inner side of the second bend helps cushion the second bend during bending, reducing folding stress at the bend and reducing the risk of bending damage to the second output structure 32.

[0056] Optionally, the second foam covers at least the fifth bend 321, the sixth bend 322, the seventh bend 323, the eighth bend 324, and the ninth bend 325 of the second bend. Furthermore, the inner side of the second bend includes the inner side of the fifth bend 321, the inner side of the sixth bend 322, the inner side of the seventh bend 323, the inner side of the eighth bend 324, and the inner side of the ninth bend 325.

[0057] See also Figures 1 to 7 In some optional embodiments, the present application also provides a battery module, which includes the battery cell assembly in any of the above embodiments.

[0058] See also Figures 1 to 7 In some optional embodiments, the present application also provides a battery pack, which includes the battery cell assembly in any of the above embodiments.

[0059] In the battery cell assembly, battery module and battery pack of the present invention, the output end of the flexible circuit board 3 adopts a first output structure 31 having a first bending portion and a second output structure 32 having a second bending portion to achieve alignment connection with the connector 21. The internal etching line sorting of the output connection end of the first output structure 31 and the internal etching line sorting of the output connection end of the second output structure 32 can be flexibly selected to be reversed according to needs, which reduces the requirements for the arrangement of the etching lines and is conducive to achieving loop connection without cross-arrangement and switching of the etching lines, which is conducive to simplifying the assembly process and improving the compatibility of the connector 21, thereby helping to reduce costs.

[0060] Throughout this specification, references to terms such as "this embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A battery cell assembly, characterized in that: include: Battery cell pack; A connector having a plurality of interfaces, wherein the plurality of interfaces are juxtaposed in two layers to form an upper layer interface group and a lower layer interface group; A flexible circuit board having an input end and an output end, the input end being electrically connected to the battery cell group, the output end including a first output structure and a second output structure, the first output structure being connected to the upper interface group, and the second output structure being connected to the lower interface group; Wherein, the first output structure has a first bending portion, and the output connection end of the first output structure is reversed through the first bending portion to correspond to and be connected with the order of the multiple interfaces of the upper interface group; and / or, the second output structure has a second bending portion, and the output connection end of the second output structure is reversed through the second bending portion to correspond to and be connected with the order of the multiple interfaces of the lower interface group.

2. The battery core assembly according to claim 1, characterized in that The battery cell group includes a plurality of battery cells that are stacked and arranged in sequence, and the input end includes a first input structure and a second input structure, the first input structure connects the first output structure and the odd-numbered battery cells among the plurality of battery cells, and the second input structure connects the second output structure and the even-numbered battery cells among the plurality of battery cells.

3. The battery cell assembly according to claim 2, characterized in that: The first input structure and the second input structure are an integrated structure.

4. The battery core assembly according to claim 2, characterized in that The first input structure and the second input structure are separate structures, and at least partially overlap and are bonded and fixed.

5. The battery core assembly according to claim 2, characterized in that: The first bending portion includes a first bend and a second bend distributed in sequence from the input connection end to the output connection end of the first output structure. The input connection end of the first output structure is connected to the first input structure and is located at the top of the battery cell group. The output connection end of the first output structure is reversed by the first bend and extends along the height direction of the battery cell group to be located on the same side of the battery cell group as the connector. The output connection end of the first output structure is reversed by the second bend and extends along the length direction of the battery cell group to be connected to the upper interface group.

6. The battery core assembly according to claim 5, characterized in that: The first bending portion also includes a third bend and a fourth bend, the third bend and the fourth bend are located between the first bend and the second bend, and are successively away from the first bend, the output connection end of the first output structure is reversed through the third bend and extends along the width direction of the battery cell group to approach the connector, and the output connection end of the first output structure is reversed through the fourth bend and extends along the height direction of the battery cell group to be aligned with the upper interface group in the height direction of the battery cell group.

7. The battery cell assembly according to claim 6, characterized in that: The output connection end of the first output structure is partially bent 180° toward the battery cell group to form the third bend, and the angle formed between the third bend and the inner side of the first output structure is 45°; the output connection end of the first output structure is partially bent 180° away from the battery cell group to form the fourth bend, and the angle formed between the fourth bend and the inner side of the first output structure is 45°.

8. The battery core assembly according to claim 2, characterized in that: The second bending portion includes a fifth bend, a sixth bend, a seventh bend and an eighth bend distributed in sequence from the input connection end to the output connection end of the second output structure. The input connection end of the second output structure is connected to the second input structure and is located at the top of the battery cell group. The output connection end of the second output structure is reversed through the fifth bend and extends along the height direction of the battery cell group to be located on the same side of the battery cell group as the connector. The output connection end of the first output structure is reversed through the sixth bend and extends along the width direction of the battery cell group to be close to the connector. The output connection end of the second output structure is reversed through the seventh bend to change the order of the internal etching lines of the output connection end of the second output structure and correspond to the order of the multiple interfaces of the lower interface group. The output connection end of the second output structure is reversed through the eighth bend and extends along the length direction of the battery cell group to be connected to the lower interface group.

9. The battery cell assembly according to claim 8, characterized in that: The output connection end of the second output structure is partially bent 180° toward the battery cell group to form the sixth bend, and the angle formed between the sixth bend and the inner side of the second output structure is 135°. The output connection end of the second output structure is partially bent 180° toward the battery cell group to form the seventh bend, and the angle formed between the seventh bend and the inner side of the second output structure is 45°.

10. The battery core assembly according to claim 8, characterized in that: The second bending portion also includes a ninth bend located between the seventh bend and the eighth bend. The output connection end of the second output structure changes direction through the ninth bend and extends along the height direction of the battery cell group to be aligned with the lower interface group in the height direction of the battery cell group.

11. The battery core assembly according to any one of claims 1 to 10, characterized in that: The output connection end of the first output structure and the output connection end of the second output structure partially overlap in the height direction of the battery cell group, and the overlapping portions are bonded and fixed.

12. The battery cell assembly according to claim 1, characterized in that The first output structure is provided with a first foam, and the first foam is located on the inner side of the first bending portion; the second output structure is provided with a second foam, and the second foam is located on the inner side of the second bending portion.

13. A battery module, characterized in that: Comprising the battery core assembly according to any one of claims 1 to 12.

14. A battery pack, characterized in that: Comprising the battery core assembly according to any one of claims 1 to 12.

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