Battery pack and electronic device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack and electronic equipment.The battery pack comprises a first battery cell, a second battery cell, a printed circuit board and a flexible circuit board, and the first battery cell, the flexible circuit board and the second battery cell are sequentially arranged in the first direction; the first one of the first battery cell and the second battery cell is electrically connected with one side, in the second direction, of the printed circuit board, the flexible circuit board comprises a first part and a second part which are sequentially connected in the third direction, and the first part is electrically connected with the other side, in the second direction, of the printed circuit board; the second one of the first battery cell and the second battery cell is electrically connected with the second part, the first direction intersects with the third direction, and the second direction intersects with a plane defined by the first direction and the third direction. According to the battery pack and the electronic equipment provided by the invention, the packaging size between the first battery cell and the second battery cell can be effectively shortened, so that the space utilization rate of the battery pack in the first direction is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and electronic device. Background Technology

[0002] Miniaturization and thinning of electronic devices are key trends in modern consumer electronics. As one of the heaviest and largest components in these devices, the battery becomes crucial for optimizing space. To achieve thinner designs, batteries are typically laid flat within the electronic device. This not only reduces the device's thickness but also allows the battery to better fit the device's contours, improving space utilization. A "head-to-head" arrangement refers to two or more battery cells with their positive and negative terminals facing each other (i.e.,...). Figure 1 (The battery heads are shown relative to each other). This method can effectively compress the space for electrical connections in the battery cells, which helps to further reduce the overall thickness of the battery pack.

[0003] like Figure 1 The diagram illustrates a modern "head-to-head" battery pack, comprising a printed circuit board (PCB), a first battery cell 1, and a second battery cell 2. The first and second battery cells 1 and 2 are positioned head-to-head along a first direction F1, and are soldered to opposite sides of the PCB 3 along a second direction F2. During the soldering process between the PCB 3 and the tabs, a support block 6 and soldering claws 7 are used to press and fix the tabs of the first battery cell 1, the PCB 3, and the second battery cell 2 along the second direction F2. This ensures that the tabs of the first battery cell 1 and their corresponding pads on the PCB 3 are closely aligned, and that the tabs of the second battery cell 2 and their corresponding pads on the PCB 3 are closely aligned, facilitating the soldering of the PCB 3 to the first and second battery cells 2. However, to avoid interference between the top sealing edges of the first and second battery cells 2 and the support block and soldering claws, a first clearance gap is typically provided between the top sealing edge of the first battery cell 1 and the corresponding pads on the PCB 3 (i.e., ...). Figure 1 As shown in S1), a second clearance gap is reserved between the top sealing edge of the second cell 2 and the corresponding pad of the printed circuit board 3 (i.e., Figure 1 As shown in S2), this makes the package size (i.e., between the first cell 1 and the second cell 2) different. Figure 1 The L shown is too large, which in turn affects the space utilization of the battery pack. Utility Model Content

[0004] The purpose of this application is to provide a battery pack and electronic device to solve, to some extent, the technical problem in the prior art that, in order to avoid interference between the top sealing edge of the first battery cell and the support block and welding claws, a first clearance gap is usually reserved between the top sealing edge of the first battery cell and the corresponding pad of the printed circuit board, and a second clearance gap is reserved between the top sealing edge of the second battery cell and the corresponding pad of the printed circuit board. This results in an excessively large package size between the first battery cell and the second battery cell, which in turn affects the space utilization of the battery pack.

[0005] According to a first aspect of this application, a battery pack is provided, including a first battery cell, a second battery cell, a printed circuit board, and a flexible circuit board, wherein the first battery cell, the flexible circuit board, and the second battery cell are arranged sequentially along a first direction;

[0006] The first of the first battery cell and the second battery cell is electrically connected to one side of the printed circuit board in a second direction. The flexible circuit board includes a first part and a second part connected sequentially along a third direction. The first part is electrically connected to the other side of the printed circuit board in the second direction. The second of the first battery cell and the second battery cell is electrically connected to the second part. The first direction intersects with the third direction, and the second direction intersects with the plane defined by the first direction and the third direction.

[0007] Preferably, the printed circuit board includes a rigid board body, a first connecting portion and a second connecting portion, wherein the first connecting portion and the second connecting portion are respectively disposed on both sides of the rigid board body in a second direction;

[0008] The first connecting part is electrically connected to the flexible circuit board, and the second connecting part is electrically connected to the tab of the first battery cell.

[0009] Preferably, the flexible circuit board includes a flexible board body, a third connecting portion and a fourth connecting portion, the flexible board body includes a first portion and a second portion, the third connecting portion is disposed in the first portion, and the fourth connecting portion is disposed in the second portion;

[0010] The third connecting part is electrically connected to the first connecting part, and the fourth connecting part is electrically connected to the tab of the second battery cell.

[0011] Preferably, the third connecting portion and the fourth connecting portion are disposed on the same side of the flexible board body in the second direction.

[0012] Preferably, the flexible board body further includes a bending portion, which connects the first portion and the second portion, and the bending portion is capable of bending so that the first portion and the second portion overlap in the second direction.

[0013] Preferably, the printed circuit board is disposed within the accommodating space formed by the first part, the bent part, and the second part.

[0014] Preferably, it further includes an insulating portion disposed between the second portion and the printed circuit board.

[0015] Preferably, the insulating portion includes:

[0016] A first insulating layer covers the outer sides of both the second connecting portion and the tab of the first battery cell;

[0017] And / or, a second insulating layer, which covers the outer side of both the fourth connection portion and the tab of the second cell.

[0018] Preferably, the first connecting portion includes a plurality of first welding portions spaced apart along the third direction;

[0019] The second connecting portion includes a plurality of second welding portions spaced apart along the third direction, and the plurality of second welding portions correspond one-to-one with the plurality of first welding portions;

[0020] The third connecting portion includes a plurality of third welding portions spaced apart along the third direction, and the plurality of third welding portions correspond one-to-one with the plurality of first welding portions;

[0021] The fourth connection portion includes a plurality of fourth welding portions spaced apart along the third direction, and the plurality of fourth welding portions correspond one-to-one with the plurality of second welding portions.

[0022] According to a second aspect of this application, an electronic device is provided, comprising the battery pack described in any of the above technical solutions, and thus possesses all the beneficial technical effects of the battery pack, which will not be repeated here.

[0023] Compared with the prior art, the beneficial effects of this application are as follows:

[0024] The battery pack provided in this application is electrically connected to one side of a printed circuit board in a second direction by the first of a first cell and a second cell, and electrically connected to a second part of a flexible circuit board. The first part of the flexible circuit board is connected to one side of the printed circuit board in the second direction. Thus, during the assembly of the first cell, the second cell and the printed circuit board, the first cell and the second cell can be staggered by the first part and the second part connected sequentially along the third direction F3, so that only the first of the first cell and the second cell is connected to the printed circuit board. In other words, only a clearance needs to be reserved on one side of the printed circuit board in the first direction, which effectively saves the number of clearances, thereby effectively shortening the packaging size between the first cell and the second cell, and thus improving the space utilization rate of the battery pack in the first direction F1.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the cross-sectional structure of an existing "head-to-head" battery pack;

[0028] Figure 2 A top view of the flexible circuit board provided in an embodiment of this application;

[0029] Figure 3 A bottom view of the flexible circuit board provided in an embodiment of this application;

[0030] Figure 4 A top view of the printed circuit board provided in an embodiment of this application;

[0031] Figure 5 A bottom view of the printed circuit board provided in an embodiment of this application;

[0032] Figure 6 This is a top view of the battery pack during the assembly process, as provided in an embodiment of this application.

[0033] Figure 7A bottom view of the battery pack during assembly, as provided in an embodiment of this application;

[0034] Figure 8 This is a schematic diagram of the assembly structure of the battery pack provided in an embodiment of this application;

[0035] Figure 9 for Figure 8 A schematic diagram of the cross-sectional structure obtained by cutting the battery pack along the AA direction;

[0036] Figure 10 for Figure 8 Another cross-sectional diagram of the provided battery pack obtained by slicing along the AA direction;

[0037] Figure 11 for Figure 8 Another cross-sectional diagram of the provided battery pack obtained by cutting it along the AA direction.

[0038] Figure label:

[0039] 1-First battery cell; 11-First tab; 2-Second battery cell; 21-Second tab; 3-Printed circuit board; 31-Rigid board body; 32-First connecting part; 321-First pad; 322-Second pad; 33-Second connecting part; 331-Third pad; 332-Fourth pad; 4-Flexible circuit board; 41-Flexible board body; 411-First part; 412-Second part; 413-Bending part; 42-Third connecting part; 421-Fifth pad; 422-Sixth pad; 43-Fourth connecting part; 431-Seventh pad; 432-Eighth pad; 51-First insulating layer; 52-Second insulating layer; 6-Support block; 7-Welding claw.

[0040] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed Implementation

[0041] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0042] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0043] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0046] The following reference Figures 2 to 11 This application describes a battery pack and electronic device according to some embodiments.

[0047] See Figures 2 to 11 As shown, an embodiment of the first aspect of this application provides a battery pack, including a first battery cell 1, a second battery cell 2, and a battery protection board. The battery protection board includes a printed circuit board 3 and a flexible circuit board 4. The first battery cell 1, the flexible circuit board 4, and the second battery cell 2 are arranged sequentially along a first direction F1. The first of the first battery cell 1 and the second battery cell 2 is electrically connected to one side of the printed circuit board 3 in the second direction F2. The flexible circuit board 4 includes a first portion 411 and a second portion 412 sequentially connected along a third direction F3. The first portion 411 is electrically connected to the other side of the printed circuit board 3 in the second direction F2, and the second of the first battery cell 1 and the second battery cell 2 is electrically connected to the second portion 412. The first direction F1 intersects with the third direction F3, and the second direction F2 intersects with the plane defined by the first direction F1 and the third direction F3.

[0048] According to the battery pack provided by the above technical features, the first of the first cell 1 and the second cell 2 is electrically connected to one side of the printed circuit board 3 in the second direction F2, the second of the first cell 1 and the second cell 2 is electrically connected to the second part 412 of the flexible circuit board 4, and the first part 411 of the flexible circuit board 4 is connected to one side of the printed circuit board 3 in the second direction F2. Thus, as... Figure 6 and Figure 7As shown, during the assembly of the first battery cell 1, the second battery cell 2, and the printed circuit board 3, the first battery cell 1 and the second battery cell 2 can be staggered by the first part 411 and the second part 412 connected sequentially along the third direction F3, so that only the first of the first battery cell 1 and the second battery cell 2 is connected to the printed circuit board 3. In other words, only one side of the printed circuit board 3 needs to be reserved for clearance, which effectively saves the number of clearances, thereby effectively shortening the packaging size between the first battery cell 1 and the second battery cell 2, and thus improving the space utilization rate of the battery pack in the first direction F1.

[0049] like Figures 1 to 11 As shown in the figure, F1 can be an example of the first direction F1 mentioned above, F2 can be an example of the second direction F2 mentioned above, and F3 can be an example of the third direction F3 mentioned above. Preferably, any two of the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other, so as to accommodate the form of both the first cell 1 and the second cell 2 being square cells.

[0050] Specifically, such as Figures 6 to 11 As shown, the first battery cell 1 may include a first tab 11 extending from inside the first battery cell 1, which is disposed at one end of the first battery cell 1 in the first direction F1. Similarly, the second battery cell 2 may include a second tab 21 extending from inside the second battery cell 2, which is disposed at one end of the second battery cell 2 in the first direction F1. When the first battery cell 1, the flexible circuit board 4, and the second battery cell 2 are arranged sequentially along the first direction F1, with the first tab 11 disposed at the end of the first battery cell 1 near the flexible circuit board 4 and the second tab 21 disposed at the end of the second battery cell 2 near the flexible circuit board 4, not only is a "head-to-head" arrangement of the battery pack achieved, but it also facilitates the electrical connection of the first battery cell 1 and the second battery cell 2 to the battery protection board respectively.

[0051] like Figures 6 to 11 As shown in the figure, the first one is the first cell 1 and the second one is the second cell 2. The following will use this as an example to describe in detail the specific structure of the battery pack provided in this application.

[0052] Preferably, such as Figure 4 , Figure 5 and Figures 9 to 11As shown, the printed circuit board 3 may include a rigid board body 31, a first connecting part 32 and a second connecting part 33. The first connecting part 32 and the second connecting part 33 are respectively disposed on both sides of the rigid board body 31 in the second direction F2, so as to realize the electrical connection between the printed circuit board 3 and the first battery cell 1 and the flexible circuit board 4 through the first connecting part 32 and the second connecting part 33 respectively.

[0053] Preferably, such as Figure 6 and Figure 7 As shown, the number of the first tabs 11 can be two, so as to realize the separate output of the positive and negative poles of the first cell 1.

[0054] Correspondingly, the aforementioned first connecting portion 32 may include a plurality of first welding portions, such as Figure 4 As shown in the figure, an example of the first connection portion 32 including two first solder portions is illustrated, which are defined as a first solder pad 321 and a second solder pad 322, respectively. The first solder pad 321 and the second solder pad 322 can be disposed at a distance along a third direction F3 on one side of the rigid board body 31 in the second direction F2. Similarly, as... Figure 5 As shown, the second connecting portion 33 may include a plurality of second welding portions, such as... Figure 4 As shown in the figure, an example of the second connection portion 33 including two second solder portions is illustrated, which are defined as a third solder pad 331 and a fourth solder pad 332, respectively. The third solder pad 331 and the fourth solder pad 332 are both disposed at intervals along a third direction F3 on the other side of the rigid board body 31 in the second direction F2.

[0055] Preferably, such as Figures 9 to 11 As shown, the first connecting portion 32 and the second connecting portion 33 can be arranged correspondingly along the second direction F2, which not only facilitates the wiring of the printed circuit board 3, but also facilitates the positioning of the first connecting portion 32 and the second connecting portion 33, making installation easier. It should be noted that the arrangement of the first connecting portion 32 and the second connecting portion 33 facing each other along the second direction F2 can be understood as the arrangement of the first pad 321 and the third pad 331 facing each other in the second direction F2, and the arrangement of the second pad 322 and the fourth pad 332 facing each other in the second direction F2.

[0056] like Figures 9 to 11 As shown in the figure, an example is shown where the first connecting part 32 is electrically connected to the flexible circuit board 4 and the second connecting part 33 is electrically connected to the first electrode 11. However, it is not limited to this. As not shown in the figure, it is also possible that the first connecting part is electrically connected to the first electrode and the second connecting part is electrically connected to the flexible circuit board.

[0057] Preferably, such as Figure 2 , Figure 3 and Figures 9 to 11 As shown, the flexible circuit board 4 may include a flexible board body 41, a third connecting portion 42, and a fourth connecting portion 43. The flexible board body 41 may include the first portion 411 and the second portion 412 described above. The third connecting portion 42 is disposed in the first portion 411, and the fourth connecting portion 43 is disposed in the second portion 412. The third connecting portion 42 can be electrically connected to the first connecting portion 32 to realize the electrical connection between the flexible circuit board 4 and the printed circuit board 3. The fourth connecting portion 43 can be electrically connected to the tab of the second battery cell 2 described above.

[0058] Correspondingly, the aforementioned third connection portion 42 may include multiple third welding portions, such as... Figure 2 and Figures 9 to 11 As shown in the figure, an example of the third connection portion 42 including two third welding portions is illustrated. The two third welding portions are defined as the fifth pad 421 and the sixth pad 422, respectively, so as to be connected to the first pad 321 and the second pad 322 of the first connection portion 32.

[0059] It should be noted that the third connecting part 42 is electrically connected to the first connecting part 32, which can be understood as, for example Figures 9 to 11 As shown, the first pad 321 is connected to the fifth pad 421, and the second pad 322 is connected to the sixth pad 422.

[0060] Similarly, such as Figure 6 and Figure 7 As shown, the number of the second electrode tabs 21 can be two, so as to realize the separate output of the positive and negative electrodes of the second battery cell 2.

[0061] Correspondingly, the aforementioned fourth connection portion 43 may include a plurality of fourth welding portions, such as Figure 2 and Figures 9 to 11 As shown in the figure, an example of the aforementioned fourth connection portion 43 including two fourth solder portions is illustrated. The two fourth solder portions are defined as the seventh solder pad 431 and the eighth solder pad 432, respectively. The seventh solder pad 431 and the eighth solder pad 432 are spaced apart along a third direction F3 to facilitate connection with the two second tabs 21, respectively.

[0062] It should be noted that the aforementioned fourth connection part 43 can be electrically connected to the tab of the aforementioned second battery cell 2, which can be understood as, for example... Figures 9 to 11 As shown, the seventh pad 431 and the eighth pad 432 are respectively connected to the two second tabs 21.

[0063] Preferably, such as Figure 2 and Figure 3As shown, the third connecting portion 42 and the fourth connecting portion 43 can both be disposed on the same side of the flexible circuit board body 41 in the second direction F2. On the one hand, this facilitates the assembly of the flexible circuit board 4; on the other hand, the third connecting portion 42 and the fourth connecting portion 43 can both be disposed on the same side of the flexible circuit board body 41, so that when the first part 411 and the second part 412 are overlapped in the second direction F2 via the bending portion 413, the third connecting portion 42 and the fourth connecting portion 43 can both be disposed within the following receiving space, ensuring the stability and safety of the electrical connection of the flexible circuit board 4.

[0064] Preferably, such as Figure 2 , Figure 3 and Figures 9 to 11 As shown, the flexible circuit board body 41 also includes a bending portion 413, which connects the first portion 411 and the second portion 412, such that the first portion 411 and the second portion 412 overlap in the second direction F2. Thus, the flexible circuit board body 41 is folded by the bending portion 413, as... Figure 8 As shown, the first cell 1 and the second cell 2 of the battery pack are arranged facing each other along the first direction F1 to further save the space occupied by the battery pack.

[0065] Preferably, such as Figures 9 to 11 As shown, the printed circuit board 3 can be disposed within the accommodating space formed by the first part 411, the bent part 413, and the second part 412. In this way, the flexible board body 41 completely encloses the electrical connection structure of the first battery cell 1, the second battery cell 2, and the battery protection board, which can effectively improve the connection stability of the battery pack and the insulation of the electrical connection structure of the first battery cell 1, the second battery cell 2, and the battery protection board.

[0066] Preferably, such as Figures 9 to 11 As shown, the battery pack may also include an insulating part, which may be disposed between the second part 412 and the printed circuit board 3 to insulate between the second connecting part 33 and the tab of the first cell 1 and between the fourth connecting part 43 and the tab of the second cell 2, so as to prevent the second connecting part 33 and the tab of the first cell 1 and the fourth connecting part 43 and the tab of the second cell 2 from coming into contact with each other and short-circuiting after the flexible circuit board 4 is bent.

[0067] Preferably, such as Figure 9 and Figure 10 As shown, the above-mentioned insulating part may include a first insulating layer 51, which may cover the outer side of both the second connecting part 33 and the first electrode 11.

[0068] Optionally, such as Figure 9 and Figure 10As shown, the first insulating layer 51 may include two independent parts, which may respectively cover the third pad 331 and the first tab 11 and the fourth pad 332 and the first tab 11.

[0069] Optionally, as not shown in the figure, the first insulating layer may also completely cover both the third pad and the first tab, and both the fourth pad and the first tab.

[0070] Preferably, such as Figure 9 and Figure 11 As shown, the above-mentioned insulating portion may include a second insulating layer 52, which may cover the outer side of both the second connecting portion 33 and the fourth connecting portion 43.

[0071] It should be noted that the covering method of the second insulating layer 52 is similar to that of the first insulating layer 51 described above, and will not be repeated here.

[0072] Alternatively, the aforementioned insulating part may be insulating tape, insulating cloth, etc.

[0073] An embodiment of the second aspect of this application also provides an electronic device including the battery pack described in any of the above embodiments, and thus has all the beneficial technical effects of the battery pack, which will not be repeated here.

[0074] Optionally, the aforementioned electronic devices may be mobile phones, tablets, electronic photo albums, e-books, smart learning machines, power banks, smart robots, etc.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack characterized by comprising: The battery pack comprises a first cell, a second cell, a printed circuit board and a flexible circuit board, the first cell, the flexible circuit board and the second cell are sequentially arranged along a first direction; A first one of the first cell and the second cell is electrically connected to one side of the printed circuit board in a second direction, the flexible circuit board comprises a first part and a second part which are sequentially connected along a third direction, the first part is electrically connected to the other side of the printed circuit board in the second direction, a second one of the first cell and the second cell is electrically connected to the second part, the first direction intersects the third direction, and the second direction intersects the plane defined by the first direction and the third direction.

2. The battery pack of claim 1, wherein, The printed circuit board comprises a hard board body, a first connecting part and a second connecting part, the first connecting part and the second connecting part are respectively arranged on both sides of the hard board body in the second direction; The first connecting part is electrically connected to the flexible circuit board, and the second connecting part is electrically connected to the tab of the first cell.

3. The battery pack according to claim 2, wherein The flexible circuit board comprises a soft board body, a third connecting part and a fourth connecting part, the soft board body comprises the first part and the second part, the third connecting part is arranged on the first part, and the fourth connecting part is arranged on the second part; The third connecting part is electrically connected to the first connecting part, and the fourth connecting part is electrically connected to the tab of the second cell.

4. The battery pack of claim 3, wherein, The third connecting part and the fourth connecting part are arranged on the same side of the soft board body in the second direction.

5. The battery pack of claim 3, wherein, The soft board body further comprises a bending part, the bending part connects the first part and the second part, and the bending part can be bent so that the first part and the second part are arranged to overlap in the second direction.

6. The battery pack of claim 5, wherein, The printed circuit board is arranged in an accommodation space formed by the first part, the bending part and the second part.

7. The battery pack of claim 6, wherein, Further comprising an insulating part arranged between the second part and the printed circuit board.

8. The battery pack of claim 7, wherein, The insulating part comprises: a first insulating layer covering the outer sides of the second connecting part and the tab of the first cell; and / or a second insulating layer covering the outer sides of the fourth connecting part and the tab of the second cell.

9. The battery pack according to claim 3, wherein The first connecting part comprises a plurality of first welding parts arranged at intervals along the third direction; The second connecting part comprises a plurality of second welding parts arranged at intervals along the third direction, and the plurality of second welding parts correspond one-to-one to the plurality of first welding parts; The third connecting part comprises a plurality of third welding parts arranged at intervals along the third direction, and the plurality of third welding parts correspond one-to-one to the plurality of first welding parts; The fourth connecting part comprises a plurality of fourth welding parts arranged at intervals along the third direction, and the plurality of fourth welding parts correspond one-to-one to the plurality of second welding parts.

10. An electronic device, comprising: The battery pack according to any one of claims 1 to 9.

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