Battery module and battery pack with same

Abstract

The utility model discloses a battery module and a battery pack with the battery module, and the battery module comprises a plurality of battery cells, and each battery cell is provided with a tab; a flexible circuit board; the rigid circuit boards are arranged on the flexible circuit board, the rigid circuit boards are arranged at intervals in the extending direction of the flexible circuit board, and the tabs are connected with the flexible circuit board and / or the rigid circuit boards. According to the battery module, the problem that a plurality of tabs are gathered on a nickel sheet and a protection plate in the battery module in the prior art, so that heat dissipation of the protection plate is not facilitated is solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery module structure design, and in particular, to a battery module and a battery pack having the same. Background Art

[0002] At present, with the continuous development of the new energy field, small and lightweight products have gradually become a development trend. Taking the battery module as an example, the commonly used assembly method of the battery module is to place the battery protection board horizontally on the top of the battery cell or to place the protection board horizontally in the top sealing groove, and then package it to form a battery pack.

[0003] However, the above assembly method not only wastes space in the top sealing groove, but also due to the limited volume of the plate body and the limited number of welded nickel sheets, the pole ears and the nickel sheets cannot be welded one by one. It is necessary to merge the pole ears of multiple battery cells together nearby and then weld them with the nickel sheets. This is not only difficult to produce, but also multiple pole ears are gathered on one nickel sheet and protective plate, which is not conducive to the heat dissipation of the protective plate. Utility Model Content

[0004] The main purpose of the present application is to provide a battery module and a battery pack having the same, so as to solve the problem in the prior art that a plurality of tabs are gathered on a nickel sheet and a protective plate, which is not conducive to the heat dissipation of the protective plate.

[0005] According to one aspect of the present application, a battery module is provided, including: a plurality of battery cells, each of which is provided with a pole ear; a flexible circuit board; a rigid circuit board, which is arranged on the flexible circuit board, and there are one or more rigid circuit boards, and the plurality of rigid circuit boards are arranged at intervals along the extension direction of the flexible circuit board, and each pole ear is connected to the flexible circuit board and / or the rigid circuit board.

[0006] Furthermore, the flexible circuit board includes multiple connecting plate segments, which are arranged one-to-one corresponding to multiple battery cells, and the pole ears on each battery cell are connected one-to-one to each connecting plate segment; wherein a rigid circuit board is arranged on any one or more connecting plate segments, and the length of the rigid circuit board is less than the length of the connecting plate segment.

[0007] Furthermore, each connecting plate segment includes a first side surface and a second side surface that are arranged opposite to each other, a connecting sheet is arranged on the first side surface, and the pole ear is connected to the connecting sheet; and the rigid circuit board is arranged on the second side surface.

[0008] Furthermore, the multiple connecting plate segments include a first connecting plate segment, and the battery module further includes: a connector, which is arranged on the first connecting plate segment; and one rigid circuit board, which is arranged on a side surface of the first connecting plate segment.

[0009] Furthermore, the multi-segment connecting plate segment also includes a second connecting plate segment, there are two connectors, and the two connectors are respectively arranged on the first connecting plate segment and the second connecting plate segment; wherein, there are two rigid circuit boards, and the two rigid circuit boards are respectively arranged on the side of the first connecting plate segment and the side of the second connecting plate segment.

[0010] Furthermore, the flexible circuit board includes multiple connecting plate segments, and the rigid circuit board is arranged between two adjacent connecting plate segments; wherein the multiple battery cells include multiple first battery cells and second battery cells, the multiple connecting plate segments are connected to the pole ears on the multiple first battery cells one by one, and the rigid circuit board is connected to the pole ears on the second battery cells.

[0011] Furthermore, multiple battery cells are stacked, and the flexible circuit board includes multiple connecting plate segments; there are multiple rigid circuit boards, and the multiple connecting plate segments and the multiple rigid circuit boards are alternately arranged in sequence along the stacking direction of the battery cells; or, there is one rigid circuit board, and one rigid circuit board is arranged between any two adjacent connecting plate segments.

[0012] Furthermore, the battery cell includes a third battery cell and a fourth battery cell that are stacked; the flexible circuit board includes a connecting plate segment and a bending segment that are connected to each other, the connecting plate segment is connected to the pole ear of the third battery cell, the bending segment is bent relative to the connecting plate segment toward a direction close to the fourth battery cell, the rigid circuit board is connected to an end of the bending segment away from the connecting plate segment, and the pole ear of the fourth battery cell of the rigid circuit board is connected.

[0013] Furthermore, a top sealing groove is provided at the end of the battery cell, and at least a part of the flexible circuit board is arranged in the top sealing groove. The battery module also includes: an adhesive layer, and two sides of the adhesive layer are respectively bonded to the groove wall surface of the top sealing groove and the flexible circuit board.

[0014] On the other hand, the present application also provides a battery pack, including a battery module, and the battery module is the battery module mentioned above.

[0015] Compared with the prior art, the technical solution of this application has at least the following technical effects:

[0016] The battery module in the present application combines a flexible circuit board with a rigid circuit board, that is, it can utilize the space of the top sealing groove on the battery cell, and can also utilize the bendability of the flexible circuit board to adapt to the stacking arrangement or other arrangements of each battery cell. The pole ears on each battery cell can respectively correspond to the connecting pieces on the flexible circuit board and / or the rigid circuit board, and there is no need to weld multiple pole ears together on one connecting piece, so that the flexible circuit board and the rigid circuit board can achieve good heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a battery module of the first prior art;

[0019] Figure 2 A schematic diagram of the structure of a battery module of the second prior art;

[0020] Figure 3 This is a schematic diagram of the structure of the battery module of this application;

[0021] Figure 4 This is an exploded view of the structure of the battery module of this application;

[0022] Figure 5 A schematic diagram of a structure in which multiple battery cells are stacked in a battery module of the present application;

[0023] Figure 6 A partial enlarged view of a plurality of battery cells stacked in a battery module of the present application;

[0024] Figure 7 This is a schematic diagram of the coordination of a flexible circuit board and a rigid circuit board in a battery module of the present application according to a first embodiment;

[0025] Figure 8 It is a structural exploded view of the first embodiment of the flexible circuit board and the rigid circuit board in the battery module of the present application;

[0026] Fig. 9 This is a schematic diagram of the coordination of the flexible circuit board and the rigid circuit board in the battery module of the present application according to the second embodiment;

[0027] Fig.10 This is a schematic diagram of the coordination of the flexible circuit board and the rigid circuit board in the battery module of the present application in a third embodiment;

[0028] Fig.11 This is a schematic diagram of the coordination of the flexible circuit board and the rigid circuit board in the battery module of the present application in a fourth embodiment;

[0029] Fig.12 This is a schematic diagram of the coordination of the flexible circuit board and the rigid circuit board in the battery module of the present application in a fifth embodiment;

[0030] Fig.13 This is a schematic diagram of the coordination of a flexible circuit board and a rigid circuit board in a battery module of the present application in a sixth embodiment.

[0031] The above drawings include the following reference numerals:

[0032] 1. Battery cell; 2. Tab; 3. Flexible circuit board; 4. Rigid circuit board; 30. Connecting plate segment; 301. First side surface; 302. Second side surface; 303. Connecting piece; 304. First connecting plate segment; 5. Connector; 305. Second connecting plate segment; 11. First battery cell; 12. Second battery cell; 31. Bending segment; 10. Top sealing groove; 6. Adhesive layer; 7. Insulating component; 8. Protective film layer. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0036] As mentioned in the background technology, in the battery module of the prior art, Figure 1 As shown, the protection plate is installed in the top sealing groove of the battery cell, or, as shown Figure 2As shown, placing the protection plate horizontally on the top of the battery cell wastes the space of the top sealing groove of the battery cell. Taking installing the protection plate in the top sealing groove of the battery cell as an example, due to the limited volume of the protection plate and the limited number of nickel sheets, the pole ears and the nickel sheets cannot be welded one by one, and multiple pole ears need to be combined together and then welded to the nickel sheets. In this way, multiple pole ears are gathered on one nickel sheet, and the nickel sheet is concentratedly heated, which is not conducive to the heat dissipation of the protection plate. Therefore, in the present application, in order to improve the heat dissipation capacity of the protection plate, the battery module includes a flexible circuit board 3 and one or more rigid circuit boards 4. Due to the bendability of the flexible circuit board 3, during the process of connecting with multiple battery cells 1, it can be connected one-to-one with the pole ears in the multiple battery cells, wherein a rigid circuit board 4 is arranged on the flexible circuit board 3, or multiple rigid circuit boards 4 are arranged on the flexible circuit board 3 at intervals. In the multiple battery cells 1, the pole ears corresponding to the flexible circuit board 3 are connected to the nickel sheet on the flexible circuit board 3, and the pole ears corresponding to the rigid circuit board 4 are connected to the nickel sheet on the rigid circuit board 4. The rigid circuit board 4 is used to enhance the supporting strength of the flexible circuit board 3. The flexible circuit board 3 is used to assemble multiple battery cells 1 in various module forms, such as folding multiple battery cells or arranging multiple battery cells side by side, to achieve one-to-one connection between the pole ears and the nickel sheet, thereby avoiding the occurrence of heat concentration areas on the flexible circuit board 3 and the rigid circuit board 4, which is beneficial to the heat dissipation of the flexible circuit board 3 and the rigid circuit board 4 and improves the safety of the battery.

[0037] See also Figures 3 to 10 As shown, the present application provides a battery module, including: a plurality of battery cells 1, each battery cell 1 is respectively provided with a pole ear 2; a flexible circuit board 3; a rigid circuit board 4, which is arranged on the flexible circuit board 3, and there are one or more rigid circuit boards 4, and the plurality of rigid circuit boards 4 are arranged at intervals along the extension direction of the flexible circuit board 3, and each pole ear 2 is connected to the flexible circuit board 3 and / or the rigid circuit board 4.

[0038] According to the battery module provided by the present application, a plurality of battery cells 1, a flexible circuit board 3 and a rigid circuit board 4 are provided. Each battery cell 1 is provided with a pole ear 2, and a rigid circuit board 4 is provided on the flexible circuit board 3. There are one or more rigid circuit boards 4. When there are multiple rigid circuit boards 4, they are arranged at intervals along the extension direction of the flexible circuit board 3, and each pole ear 2 is connected to the corresponding flexible circuit board 3 and the rigid circuit board 4. In this way, the rigid circuit board 4 is arranged on the flexible circuit board 3 to enhance the support strength of the flexible circuit board 3. The flexibility of the flexible circuit board 3 is used to be suitable for various forms of assembly of multiple battery cells 1. The flexible circuit board 3 can be folded and bent according to the arrangement of the multiple battery cells 1. In this way, the flexible circuit board 3 corresponds to the pole ears on each battery cell 1, and each pole ear can be connected to the nickel sheet one by one. Or when the rigid circuit board 4 corresponds to the pole ears on the battery cell 1, the pole ears can also be connected to the rigid circuit board 4, without connecting multiple pole ears 2 and then connecting to the same nickel sheet, thereby avoiding the situation where the temperature on the flexible circuit board 3 or the rigid circuit board 4 is too high, which is beneficial to the heat dissipation of the flexible circuit board 3 and the rigid circuit board 4, and improves the safety performance of the battery.

[0039] In the first embodiment provided in the present application, the flexible circuit board 3 includes multiple connecting plate segments 30, which are arranged one-to-one with multiple battery cells 1, and the tabs 2 on each battery cell 1 are connected to each connecting plate segment 30 one-to-one; wherein, a rigid circuit board 4 is arranged on any one or more connecting plate segments 30, and the length of the rigid circuit board 4 is less than the length of the connecting plate segment 30. When multiple battery cells 1 are arranged side by side or stacked, each connecting plate segment 30 is arranged one-to-one with each battery cell 1, and a rigid circuit board 4 is arranged on any one or more connecting plate segments 30 to improve the overall structural strength of the flexible circuit board 3.

[0040] Specifically, each connecting plate segment 30 includes a first side surface 301 and a second side surface 302 that are arranged opposite to each other, a connecting piece 303 is arranged on the first side surface 301, and the tab 2 is connected to the connecting piece 303; and the rigid circuit board 4 is arranged on the second side surface 302. This arrangement prevents the rigid circuit board 4 from interfering with the welding of the tab 2 and the connecting piece 303.

[0041] Furthermore, the multi-section connecting plate segment 30 includes a first connecting plate segment 304, and the battery module further includes: a connector 5, which is arranged on the first connecting plate segment 304; and one rigid circuit board 4, which is arranged on the side of the first connecting plate segment 304. Since the connector 5 is arranged on the first connecting plate segment 304, one rigid circuit board 4 is arranged on the first connecting plate segment 304, thereby improving the structural strength of the first connecting plate segment 304 and providing a good support for the connector 5.

[0042] For the current requirement that is too large, one connector 5 cannot meet the current value, and two connectors 5 are required to cooperate. In this case, the multi-section connecting plate segment 30 also includes a second connecting plate segment 305, and there are two connectors 5, which are respectively arranged on the first connecting plate segment 304 and the second connecting plate segment 305; wherein, there are two rigid circuit boards 4, which are respectively arranged on the side of the first connecting plate segment 304 and the side of the second connecting plate segment 305. Preferably, the first connecting plate segment 304 and the second connecting plate segment 305 are respectively located at the two ends of the flexible circuit board 3. In order to ensure the reliability of the connection of the two connectors 5, two rigid circuit boards 4 are arranged, and the two rigid circuit boards 4 are respectively arranged on the first connecting plate segment 304 and the second connecting plate segment 305.

[0043] In the second embodiment provided in this application, Fig. 9 As shown, the flexible circuit board 3 includes multiple connecting plate segments 30, and the rigid circuit board 4 is arranged between two adjacent connecting plate segments 30; wherein the multiple battery cells 1 include multiple first battery cells 11 and second battery cells 12, the multiple connecting plate segments 30 are connected to the pole tabs 2 on the multiple first battery cells 11 in one-to-one correspondence, and the rigid circuit board 4 is connected to the pole tabs 2 on the second battery cells 12. In this embodiment, the flexible circuit board 3 and the rigid circuit board 4 are welded in sequence, and the components can be distributed on the rigid circuit board 4 or the flexible circuit board 3. The length of the rigid circuit board 4 is less than the width of the second battery cell 12. When multiple battery cells 1 are stacked, the flexible circuit board 3 is bent along with the layout of the battery cells 1 to form multiple connecting plate segments 30, so that each connecting plate segment 30 is connected to the pole tabs 2 on the corresponding first battery cells 11. At the same time, the rigid circuit board 4 corresponds to the second battery cell 12, and the rigid circuit board 4 is welded to the pole tabs 2 on the second battery cell 12. Preferably, the rigid circuit board 4 is arranged at the end position, that is, during the assembly process, the first rigid circuit board 4 among the multiple rigid circuit boards 4 is close to the connector 5 relative to the first connecting board section 30. Since the connector 5 is connected to the end of the entire protective plate, setting the rigid circuit board 4 at the end position can better support the connector 5.

[0044] Further, multiple battery cells 1 are stacked, and the flexible circuit board 3 includes multiple connecting board segments 30; there are multiple rigid circuit boards 4, and the multiple connecting board segments 30 and the multiple rigid circuit boards 4 are alternately arranged in sequence along the stacking direction of the battery cells 1; or, there is one rigid circuit board 4, and one rigid circuit board 4 is arranged between any two adjacent connecting board segments 30. By cooperating the flexible circuit board 3 with the rigid circuit board 4, the number of rigid circuit boards 4 is reduced, so that the rigid circuit board 4 can adapt to multiple battery cells 1 arranged in different ways according to the bendability of the flexible circuit board 3.

[0045] Specifically, the battery cell 1 includes a third battery cell and a fourth battery cell which are stacked; the flexible circuit board 3 includes a connecting plate segment 30 and a bending segment 31 which are connected to each other, the connecting plate segment 30 is connected to the pole ear 2 of the third battery cell, the bending segment 31 is bent relative to the connecting plate segment 30 toward the direction close to the fourth battery cell, the rigid circuit board 4 is connected to an end of the bending segment 31 away from the connecting plate segment 30, and the rigid circuit board 4 is connected to the pole ear 2 of the fourth battery cell. When the third battery cell and the fourth battery cell are stacked, the bending segment 31 of the flexible circuit board 3 is bent so that the rigid circuit board 4 connected thereto can correspond to the fourth battery cell, so as to ensure that the pole ear 2 on the fourth battery cell can be connected to the rigid circuit board 4.

[0046] In the third embodiment provided in this application, Fig.10 As shown, when the number of the battery cells 1 is two, the connector 5 is arranged at the end of the flexible circuit board 3 , and the rigid circuit board 4 is preferably arranged on a connecting plate section of the flexible circuit board 3 close to the connector 5 .

[0047] In the fourth embodiment provided in this application, Fig.11 As shown, when the number of battery cells 1 is three, the flexible circuit board 3 includes three connecting board segments 30 , and at this time there are two rigid circuit boards 4 , which are respectively arranged on the two connecting board segments 30 at both ends of the flexible circuit board 3 .

[0048] In the fifth embodiment provided in this application, Fig.12 As shown, the number of battery cells 1 is four, and the flexible circuit board 3 includes four connecting board segments 30, which are arranged one-to-one corresponding to the four battery cells 1, and the number of rigid circuit boards 4 is two, and the two rigid circuit boards 4 are respectively arranged on the first connecting board segment 30 and the third connecting board segment 30.

[0049] In the sixth embodiment provided in this application, Fig.13 As shown, the number of connectors 5 is two, and the number of battery cells is four. At this time, in order to ensure the connection strength of the connector 5, the number of rigid circuit boards 4 is two, and the two rigid circuit boards 4 are respectively arranged on two connecting board sections 30 connected with the connector 5.

[0050] In the present application, a top seal groove 10 is provided at the end of the battery cell 1, and at least a part of the flexible circuit board 3 is provided in the top seal groove 10. The battery module further includes: an adhesive layer 6, and both sides of the adhesive layer 6 are respectively bonded to the groove wall surface of the top seal groove 10 and the flexible circuit board 3. The flexible circuit board 3 is fixed in the top seal groove 10 by the adhesive layer 6, and then the insulating component 7 is buckled on the flexible circuit board 3, the rigid circuit board 4 and each battery cell 1, and finally the protective film layer 8 is pasted. The insulating component 7 and the protective film layer 8 play an insulating and protective role for the battery cell, the flexible circuit board 3 and the rigid circuit board 4.

[0051] The present application also provides a battery pack, including a battery module, and the battery module is the battery module mentioned above.

[0052] In the present application, the flexible circuit board 3 (FPC circuit board) has good flexibility and can be folded, bent and folded, and is suitable for application scenarios that require bending or special shapes; the flexible circuit board 3 and the rigid circuit board 4 are placed upright in the top sealing groove 10, and the height of the top groove can be used to sink part of the protective plate inside the battery, saving some height space and improving product competitiveness.

[0053] In the actual production process, since the rigid circuit board 4 is a rigid structure and cannot be bent, the N battery cell tabs are welded to the protection board assembly. Due to the terminal structure, the battery cells need to be overlapped, such as Figure 3 As shown, if only a rigid circuit board 4 is used, the rigid circuit board 4 cannot be bent. Therefore, the battery module in the present application combines the flexible circuit board 3 with the rigid circuit board 4, that is, the space of the top sealing groove on the battery cell can be utilized, and the bendability of the flexible circuit board 3 can also be utilized to adapt to the stacking arrangement of each battery cell. The pole ears on each battery cell can respectively correspond to the connecting pieces on the flexible circuit board 3 and / or the rigid circuit board 4, so that the flexible circuit board 3 and the rigid circuit board 4 can achieve good heat dissipation effect.

[0054] For example, N cells normally require N hard boards (rigid circuit boards 4), and then a whole soft board (flexible circuit board 3) is used to connect the N hard boards. This application reduces the number of hard boards, that is, uses N1 (N>N1) hard boards, and connects them through soft boards. Figure 7 , Figure 8 , Figures 10 to 12 As shown, the entire flexible board is connected to N cells through 1 or N1 (N>N1) hard boards as flexible board reinforcement boards, and the components are distributed on the flexible board. Fig. 9 As shown, N cells, N1 hard boards, (N-N1) soft boards are used, and the soft boards and hard boards are welded together in sequence. Components can be distributed on hard boards or on soft boards. The pole ears on each cell are first welded to the nickel sheet of the corresponding position of the protection board (flexible circuit board 3 or rigid circuit board 4), and then double-sided tape is pasted on the vertical surface of the top seal groove to fix the protection board assembly (flexible circuit board 3 or rigid circuit board 4) to the cell at the corresponding position. Then paste the head glue (insulating component 7), and finally paste the wrapping film (protective film layer 8). The head glue and wrapping film play the role of insulating protection for the cell and the protection board. The number and placement of hard boards are affected by the following factors: the number of cells, the weight of the cells, the number of components of the protection board assembly, the current size, etc. The number of hard boards, usually: 2 cells, preferably 1 hard board; the number of cells: 3 to 4, preferably 2 hard boards.

[0055] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0056] According to the battery module provided by the present application, a plurality of battery cells 1, a flexible circuit board 3 and a rigid circuit board 4 are provided. Each battery cell 1 is provided with a pole ear 2, and a rigid circuit board 4 is provided on the flexible circuit board 3. There are one or more rigid circuit boards 4. When there are multiple rigid circuit boards 4, they are arranged at intervals along the extension direction of the flexible circuit board 3, and each pole ear 2 is connected to the corresponding flexible circuit board 3 and the rigid circuit board 4. In this way, the rigid circuit board 4 is arranged on the flexible circuit board 3 to enhance the support strength of the flexible circuit board 3. The flexibility of the flexible circuit board 3 is used to be suitable for various forms of assembly of multiple battery cells 1. The flexible circuit board 3 can be folded and bent according to the arrangement of the multiple battery cells 1. In this way, the flexible circuit board 3 corresponds to the pole ears on each battery cell 1, and each pole ear can be connected to the nickel sheet one by one. Or when the rigid circuit board 4 corresponds to the pole ears on the battery cell 1, the pole ears can also be connected to the rigid circuit board 4, without connecting multiple pole ears 2 and then connecting to the same nickel sheet, thereby avoiding the situation where the temperature on the flexible circuit board 3 or the rigid circuit board 4 is too high, which is beneficial to the heat dissipation of the flexible circuit board 3 and the rigid circuit board 4, and improves the safety performance of the battery.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: A plurality of battery cells (1), each of the battery cells (1) being provided with a pole lug (2); Flexible circuit board (3); A rigid circuit board (4) is arranged on the flexible circuit board (3); there are one or more rigid circuit boards (4); a plurality of rigid circuit boards (4) are arranged at intervals along the extension direction of the flexible circuit board (3); and each of the tabs (2) is connected to the flexible circuit board (3) and / or the rigid circuit board (4).

2. The battery module according to claim 1, characterized in that: The flexible circuit board (3) comprises a plurality of connecting plate segments (30), the plurality of connecting plate segments (30) being arranged in one-to-one correspondence with the plurality of battery cells (1), and the tabs (2) on each of the battery cells (1) being connected in one-to-one correspondence with each of the connecting plate segments (30); Wherein, a rigid circuit board (4) is arranged on any one or more of the connecting plate segments (30), and the length of the rigid circuit board (4) is smaller than the length of the connecting plate segment (30).

3. The battery module according to claim 2, characterized in that: Each of the connecting plate segments (30) comprises a first side surface (301) and a second side surface (302) which are arranged opposite to each other; a connecting sheet (303) is arranged on the first side surface (301); and the pole lug (2) is connected to the connecting sheet (303); The rigid circuit board (4) is arranged on the second side surface (302).

4. The battery module according to claim 2, characterized in that: The plurality of connecting plate segments (30) include a first connecting plate segment (304), and the battery module further includes: A connector (5) is arranged on the first connecting plate section (304); and there is one rigid circuit board (4), which is arranged on a side surface of the first connecting plate section (304).

5. The battery module according to claim 4, characterized in that: The plurality of connecting plate segments (30) further include a second connecting plate segment (305), the number of the connectors (5) being two, and the two connectors (5) being respectively arranged on the first connecting plate segment (304) and the second connecting plate segment (305); There are two rigid circuit boards (4), and the two rigid circuit boards (4) are respectively arranged on a side surface of the first connecting plate segment (304) and a side surface of the second connecting plate segment (305).

6. The battery module according to claim 1, characterized in that: The flexible circuit board (3) comprises a plurality of connecting board segments (30), and the rigid circuit board (4) is arranged between two adjacent connecting board segments (30); The plurality of battery cells (1) include a plurality of first battery cells (11) and a plurality of second battery cells (12); a plurality of connecting plate segments (30) are connected one-to-one with the plurality of pole tabs (2) on the first battery cells (11); and the rigid circuit board (4) is connected with the pole tabs (2) on the second battery cells (12).

7. The battery module according to claim 1, characterized in that: A plurality of the battery cells (1) are stacked, and the flexible circuit board (3) comprises a plurality of connecting board sections (30); There are multiple rigid circuit boards (4), and multiple connecting board segments (30) and multiple rigid circuit boards (4) are alternately arranged in sequence along the stacking direction of the battery core (1); or, There is one rigid circuit board (4), and one rigid circuit board (4) is arranged between any two adjacent connecting board sections (30).

8. The battery module according to claim 1, characterized in that: The battery cell (1) comprises a third battery cell and a fourth battery cell which are stacked; The flexible circuit board (3) comprises a connecting plate section (30) and a bending section (31) which are connected to each other; the connecting plate section (30) is connected to the pole ear (2) of the third battery cell; the bending section (31) is bent relative to the connecting plate section (30) in a direction close to the fourth battery cell; the rigid circuit board (4) is connected to an end of the bending section (31) away from the connecting plate section (30), and the rigid circuit board (4) is connected to the pole ear (2) of the fourth battery cell.

9. The battery module according to claim 1, characterized in that: The end of the battery cell (1) is provided with a top sealing groove (10), at least a portion of the flexible circuit board (3) is arranged in the top sealing groove (10), and the battery module further comprises: An adhesive layer (6), two sides of the adhesive layer (6) being respectively bonded to the groove wall surface of the top sealing groove (10) and the flexible circuit board (3).

10. A battery pack, comprising a battery module, characterized in that: The battery module is the battery module according to any one of claims 1 to 9.

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