Electronic device
By using integrated circuit boards and electrical connections to connect the battery in electronic devices, the problem of excessive signal transmission path and large wiring space is solved, and the cost reduction and design simplification is achieved.
Patent Information
- Application Number
- CN202411656815.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-02-18
AI Technical Summary
In existing electronic devices, the motherboard, subboard and battery are connected by FPC and BTB, resulting in a long signal transmission path and occupies a lot of wiring space, which increases cost and design difficulty.
An integrated circuit board is adopted, including the main board area, the sub board area and the battery protection board area. The battery body is located in the installation space of the circuit board, and the battery protection board area and the battery body are connected through electrical connections to realize signal transmission.
Reduces FPC and BTB usage, simplifies wiring, reduces cost and design difficulty, improves installation efficiency, and reduces the thickness and size of electronic devices.
Smart Images

Figure CN119486006A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of electronic products, and specifically relates to an electronic device. Background Art
[0002] Some electronic devices in related technologies (such as mobile phones, tablet computers, e-books, etc.) basically adopt a three-section structure, that is, they are mainly composed of a main board, a battery, and a sub-board. The main board and the sub-board are connected through a flexible printed circuit (FPC), and the FPC is connected to the main board or sub-board through a board-to-board (BTB) connection.
[0003] However, the above method will increase the number of FPCs used, invisibly increase the electrical signal transmission path, and increase the cost; and, due to the use of BTB, the wiring space on the main board, sub-board, etc. will be occupied, increasing the design difficulty. Summary of the invention
[0004] The purpose of the embodiments of the present application is to provide an electronic device that can solve the problems of using FPC and BTB connections between the main board, the sub-board and the battery, resulting in a long signal transmission path and occupying more wiring space.
[0005] In order to solve the above technical problems, this application is implemented as follows: The embodiment of the present application provides an electronic device, comprising: a device body, a circuit board, a battery body and an electrical connector; The circuit board is arranged on the device body, and the circuit board includes a main board area, a sub-board area and a battery protection board area which are electrically connected; The circuit board is provided with an installation space, and the battery body is arranged in the installation space; The electrical connector is connected between the battery protection plate area and the battery body.
[0006] In the embodiment of the present application, the electronic device may include an integrated circuit board, the current board includes an electrically connected main board area, a sub-board area and a battery protection board area, and the main board area, the sub-board area and the battery protection board area can be used for signal transmission; the circuit board is provided with an installation space, and the battery body is provided in the installation space, so that the circuit board can avoid interfering with the installation of the battery body, and compared with the way of stacking the battery body and the circuit board, the thickness of the electronic device can be effectively reduced and the appearance can be improved; in addition, the battery protection board area is electrically connected to the battery body through an electrical connector, so that the circuit board can be powered by the battery body. Compared with the way of using multiple FPCs and multiple BTBs in the related art to connect the independent main boards, sub-boards and protection boards together, the integrated circuit board in the embodiment of the present application can realize signal transmission through the integrated circuit board itself without using FPC and BTB to realize basic functions, thereby effectively alleviating the problem of too long signal transmission path and high cost; it can also effectively avoid the problem of BTB occupying too much wiring space on the main board, sub-board and battery protection board, which is conducive to simplifying the wiring difficulty; it can also realize the direct connection of the main board, sub-board and battery protection board through the integrated circuit board without the need for FPC switching. In addition, since the embodiment of the present application uses an integrated circuit board, it can also be installed as a whole without the need to install each part separately, thereby reducing the difficulty of installation and improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 A schematic cross-sectional view of an electronic device disclosed in an embodiment of the present application in the longitudinal direction; Figure 2 A schematic cross-sectional view of an electronic device disclosed in an embodiment of the present application in a horizontal direction; Figure 3 Figure 1 A partial enlarged view of the middle A; Figure 4 A schematic cross-sectional view of a circuit board disclosed in an embodiment of the present application in a horizontal direction; Figure 5 A schematic cross-sectional view of a portion of a circuit board disclosed in an embodiment of the present application; Figure 6 It is a cross-sectional schematic diagram of the circuit board and production line patch disclosed in the embodiment of the present application.
[0008] Description of reference numerals: 10-device body; 11-frame; 20-circuit board; 21-main board area; 22-sub-board area; 23-battery protection board area; 231-first slot; 232-second slot; 241-first electrical connection part; 242-second electrical connection part; 2411-gold layer; 2412-nickel layer; 2413-copper layer; 25-groove; 251-bottom wall; 252-side wall; 26-avoidance hole; 30-battery body; 40-electrical connector; 41-first connecting piece; 42-second connecting piece; 43-arc-shaped piece; 50-Production line patch. DETAILED DESCRIPTION
[0009] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0010] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.
[0011] The embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.
[0012] refer to Figures 1 to 6 An embodiment of the present application discloses an electronic device, which includes a device body 10, a circuit board 20, a battery body 30 and an electrical connector 40.
[0013] The device body 10 is a basic component, which can provide a bearing and installation basis for the circuit board 20, the battery body 30, the electrical connector 40, etc. In some embodiments, the device body 10 may include components such as a frame 11, a housing, a display screen, and of course, other components may also be included, which will not be elaborated here, and specific reference may be made to related technologies.
[0014] The battery body 30 is a power supply component of the electronic device, which can provide electrical energy for the operation of the electronic device.
[0015] The circuit board 20 is one of the core components of the electronic device. The electronic device can be controlled by the circuit board 20 so that the electronic device can operate normally. In some embodiments, the circuit board 20 can be provided in the device body 10 to ensure the installation stability of the circuit board 20 through the device body 10. Exemplarily, the circuit board 20 can be installed to the frame 11.
[0016] To achieve different functions, the circuit board 20 may include a main board area 21, a sub-board area 22 and a battery protection board area 23. Figures 1 to 4 As shown. Among them, the main board area 21 is the main control part of the electronic device, which can receive signals, process signals and send signals to the outside; the sub-board area 22 is the auxiliary control part of the electronic device, which can also receive signals, process signals and send signals to the outside; the battery protection board area 23 is mainly used for signal transmission between the battery body 30. It should be noted here that the respective structures and working principles of the main board area 21, the sub-board area 22 and the battery protection board area 23 can refer to the main board, sub-board and protection board in the relevant technology. It should be noted here that in order to facilitate the distinction between the main board area 21, the sub-board area 22 and the battery protection board area 23, the display type of the main board area 21, the sub-board area 22 and the battery protection board area 23 is distinguished in the drawings of the specification in the embodiment of the present application.
[0017] In an embodiment of the present application, the main board area 21, the sub-board area 22 and the battery protection board area 23 can be electrically connected, including: the sub-board area 22 and the battery protection board area 23 can both be electrically connected to the main board area 21 to transmit signals with the main board area 21 respectively.
[0018] Considering that the battery body 30 is also installed to the device body 10, in order to avoid installation interference between the battery body 30 and the circuit board 20, the circuit board 20 can be provided with an installation space, and the battery body 30 is provided with an installation space. Based on this arrangement, it is possible to effectively avoid the circuit board 20 interfering with the installation of the battery body 30, ensuring that the circuit board 20 and the battery body 30 are each well installed; and, since at least part of the battery body 30 is located in the installation space, compared with the way in which the battery body 30 is superimposed on the surface of the circuit board 20, the overall thickness of the battery body 30 and the circuit board 20 can be reduced to a certain extent, thereby further reducing the thickness of the entire electronic device. Optionally, the installation space can be set along the thickness direction of the circuit board 20 to accommodate the battery body 30.
[0019] Exemplarily, the battery body 30 may be completely located in the installation space, or may be partially located in the installation space, which is selected according to actual working conditions.
[0020] In the embodiment of the present application, the electrical connector 40 is connected between the battery protection board area 23 and the battery body 30, and since the battery protection board area 23 is electrically connected to the main board area 21, and the sub-board area 22 is electrically connected to the main board area 21, the battery body 30 can be electrically connected to the battery protection board area 23, the main board area 21 and the sub-board area 22 respectively through the electrical connector 40 to facilitate power supply.
[0021] In an embodiment of the present application, the electronic device may include an integrated circuit board 20, which includes an electrically connected main board area 21, a sub-board area 22 and a battery protection board area 23, and signals can be transmitted between the main board area 21, the sub-board area 22 and the battery protection board area 23; the circuit board 20 is provided with an installation space, and the battery body 30 is arranged in the installation space, so that the circuit board 20 can avoid interfering with the installation of the battery body 30. Compared with the stacking method of the battery body 30 and the circuit board 20, the thickness of the electronic device can be effectively reduced and the appearance can be improved; in addition, the battery protection board area 23 is electrically connected to the battery body 30 through an electrical connector 40, so as to facilitate the circuit board 20 to be powered by the battery body 30.
[0022] Compared with the method in the related art that multiple FPCs and multiple BTBs are used to connect the independent main board, sub-board and protection board together, the integrated circuit board 20 in the embodiment of the present application can realize signal transmission through the integrated circuit board 20 itself without using FPC and BTB to realize basic functions, thereby effectively alleviating the problem of too long signal transmission path and high cost; it can also effectively avoid the problem of BTB occupying too much wiring space on the main board, sub-board and battery protection board, which is conducive to simplifying the wiring difficulty; it can also realize the direct connection of the main board, sub-board and battery protection board through the integrated circuit board 20 without the need for FPC switching. In addition, since the embodiment of the present application adopts an integrated circuit board 20, it can also realize overall installation without the need to install each part separately, thereby reducing the difficulty of installation and improving installation efficiency.
[0023] Optionally, the electronic device may have a length direction, a width direction and a thickness direction that are perpendicular to each other. Exemplarily, the electronic device may be a rectangular plate, and its thickness direction dimension is smaller than the length direction dimension and the width direction dimension.
[0024] refer to Figure 1 In some embodiments, the main board area 21, the battery protection board area 23 and the auxiliary board area 22 can be arranged in sequence on the circuit board 20, and the battery body 30 is located between the battery protection board area 23 and the auxiliary board area 22. Based on this arrangement, it is possible to avoid installation interference between the battery body 30 and the circuit board 20, and meet the actual installation requirements of each area.
[0025] Exemplarily, the main board area 21, the battery protection board area 23 and the auxiliary board area 22 can be arranged in sequence along the length direction of the electronic device; of course, other arrangement directions are also possible, which are not specifically limited here.
[0026] In some embodiments, the circuit board 20 may be provided with a groove 25 between the battery protection board area 23 and the auxiliary board area 22. Figure 2 and Figure 4 As shown, the groove 25 can have the above-mentioned installation space, and the battery body 30 is arranged in the installation space of the groove 25. In this way, based on the setting of the installation space, the installation interference between the circuit board 20 and the battery body 30 can be avoided, and the overall assembly size of the circuit board 20 and the battery body 30 can also be reduced, which is beneficial to reducing the appearance size of the electronic device, especially to reducing the thickness size of the electronic device.
[0027] In order to ensure that the batteries in the battery protection plate area 23 can be electrically connected through the electrical connector 40, in the embodiment of the present application, a side of the groove 25 close to the battery protection plate area 23 can be provided with an avoidance hole 26, such as Figure 3 As shown, accordingly, the electrical connector 40 is arranged in the avoidance hole 26 and contacts the battery protection plate area 23 and the battery body 30 respectively. Based on this arrangement, it can be ensured that the battery protection plate area 23 and the battery body 30 can be electrically connected without being blocked by the side wall 252 of the groove 25.
[0028] Optionally, the avoidance hole 26 can be opened in a local area of the side wall 252 of the groove 25 close to the battery protection plate area 23. In this way, it can ensure that the electrical connector 40 can pass through, and the side wall 252 around the avoidance hole 26 can limit the battery body 30 to ensure the installation stability of the battery body 30.
[0029] refer to Figure 1 In some embodiments, the groove 25 may include a bottom wall 251 and a plurality of side walls 252 disposed around the bottom wall 251, and the bottom wall 251 and the plurality of side walls 252 together enclose an installation space. Based on this configuration, the plurality of surfaces of the battery body 30 may contact the bottom wall 251 and the plurality of side walls 252, respectively, so that the battery body 30 is limited in position to ensure the installation stability of the battery body 30.
[0030] Furthermore, the bottom wall 251 and at least one of the side walls 252 are used for wiring. Thus, the main board area 21 and the secondary board area 22 can be electrically connected through the wiring of the bottom wall 251 and at least one of the side walls 252 to achieve signal transmission. Exemplarily, wiring can be arranged along the length direction of the electronic device on the bottom wall 251 to connect the main board area 21 and the secondary board area 22 together through wiring; wiring can also be arranged along the length direction of the electronic device on at least one side wall 252 along the width direction of the electronic device, and the main board area 21 and the secondary board area 22 can also be connected together through wiring; of course, wiring can also be arranged along the length direction of the electronic device on the bottom wall 251 and the side walls 252 respectively.
[0031] In other embodiments, the groove 25 may also be a through groove, and this type of groove 25 includes a plurality of side walls 252, and the plurality of side walls 252 together enclose an installation space. Based on this configuration, the plurality of surfaces of the battery body 30 may contact the plurality of side walls 252, respectively, so that the battery body 30 is limited in position to ensure the installation stability of the battery body 30.
[0032] Furthermore, at least one side wall 252 can be used for wiring. Thus, the main board area 21 and the sub-board area 22 can be electrically connected through the wiring on at least one side wall 252 to achieve signal transmission.
[0033] It should be noted here that the wiring on the bottom wall 251 and / or the side wall 252 of the groove 25 can replace the FPC wiring.
[0034] refer to Figure 3 In some embodiments, a first electrical connection portion 241 and a second electrical connection portion 242 may be provided on one side of the battery protection board area 23 close to the battery body 30. The first electrical connection portion 241 is electrically connected to the positive electrode of the battery body 30 through an electrical connector 40, and the second electrical connection portion 242 is electrically connected to the negative electrode of the battery body 30 through another electrical connector 40. Based on this configuration, the electrical connection between the battery body 30 and the battery protection board area 23 can be achieved to realize signal transmission.
[0035] Optionally, the first electrical connection part 241 and the electrical connector 40 may be fixedly connected or detachably connected; the second electrical connection part 242 and the electrical connector 40 may be fixedly connected or detachably connected. In addition, the positive electrode of the battery body 30 and the electrical connector 40 may be fixedly connected or detachably connected; the negative electrode of the battery body 30 and the electrical connector 40 may be fixedly connected or detachably connected. The above-mentioned fixed connection may be welding, riveting, etc., and the detachable connection may be abutting, clamping, screwing, hooking, etc.
[0036] refer to Figure 5In some embodiments, the first electrical connection part 241 and the second electrical connection part 242 may include a gold layer 2411, a nickel layer 2412 and a copper layer 2413. The copper layer 2413, the nickel layer 2412 and the gold layer 2411 are stacked in sequence along the direction from the battery protection plate area 23 to the battery body 30, and the gold layer 2411 is in contact with the electrical connector 40. Based on this arrangement, the stability of signal transmission between the first electrical connection part 241 and the positive electrode of the battery body 30, and the second electrical connection part 242 and the negative electrode of the battery body 30 can be ensured, and it can be beneficial to expand current transmission to a certain extent.
[0037] Optionally, the embodiment of the present application can use electroplating to stack the copper layer 2413, the nickel layer 2412 and the gold layer 2411 in sequence on the side of the battery protection plate area 23 facing the battery body 30 to form a first electrical connection part 241 or a second electrical connection part 242.
[0038] refer to Figure 1 and Figure 3 In other embodiments, the side of the battery protection board area 23 close to the battery body 30 may also be provided with a first slot 231 and a second slot 232, and accordingly, the first electrical connection part 241 is provided in the first slot 231, and the second electrical connection part 242 is provided in the second slot 232. Based on this arrangement, it is beneficial to improve the connection reliability between the first electrical connection part 241 and the second electrical connection part 242 and one side of the battery protection board area 23. It should be noted here that in order to make the contact conduction more reliable, the first slot 231 and the second slot 232 are provided on the side of the battery protection board area 23 close to the battery body 30, and the first metal part and the second metal part are respectively provided in the first slot 231 and the second slot 232, so as to form a reliable and stable connection.
[0039] Optionally, in the embodiment of the present application, the first slot 231 or the second slot 232 may be surface treated by a nickel-gold immersion process, so that a first electrical connection portion 241 and a second electrical connection portion 242 are formed in the first slot 231 and the second slot 232, respectively. In addition, the first slot 231 and the second slot 232 may be opened on one side of the battery protection plate close to the battery body 30 by drilling. Exemplarily, the aperture of the first slot 231 may be 1mm-5mm, for example, including: 1mm, 2mm, 3mm, etc.; the aperture of the second slot 232 may be 1mm-5mm, for example, including: 1mm, 2mm, 3mm, etc.
[0040] In order to achieve a stable connection between the battery protection plate area 23 and the battery body 30, in the embodiment of the present application, the electrical connector 40 may be an elastic member, and the electrical connector 40 elastically abuts between the battery protection plate area 23 and the battery body 30. Based on this, it can be ensured that a reliable connection is formed between the electrical connector 40 and the side of the battery protection plate area 23 close to the battery body 30, further ensuring the stable transmission of signals between the battery protection plate area 23 and the electrical connector 40, and it can also be ensured that a reliable connection is formed between the electrical connector 40 and the battery body 30, further ensuring the stable layer transmission of signals between the battery body 30 and the electrical connector 40.
[0041] In addition, under this configuration, the battery body 30 and the electrical connector 40 , as well as the electrical connector 40 in the battery protection board area 23 , can be separated from each other to facilitate the disassembly, assembly and maintenance of the battery body 30 .
[0042] In other embodiments, the elastic member may also be fixedly connected to the battery protection plate area 23 and the battery body 30 respectively, which is beneficial to improve the reliability of the connection.
[0043] refer to Figure 3 In some more specific embodiments, the electrical connector 40 may include a first connecting piece 41, an arc-shaped piece 43 and a second connecting piece 42 connected in sequence, and at least one of the first connecting piece 41, the arc-shaped piece 43 and the second connecting piece 42 can be elastically deformed. In this way, at least a portion of the electrical connector 40 can be elastically deformed so as to elastically abut between the battery protection plate area 23 and the battery body 30.
[0044] Further, the surface of the first connecting piece 41 away from the second connecting piece 42 can be elastically abutted against one of the battery protection board area 23 and the battery body 30, and the end of the second connecting piece 42 away from the first connecting piece 41 can be elastically abutted against one of the battery protection board area 23 and the battery body 30. This includes: the surface of the first connecting piece 41 is elastically abutted against the battery protection board area 23, and one end of the second connecting piece 42 is elastically abutted against the battery body 30; or the surface of the second connecting piece 42 is elastically abutted against the battery protection board area 23, and one end of the first connecting piece 41 is elastically abutted against the battery body 30, which can be set specifically according to actual working conditions.
[0045] It should be noted here that in the embodiment of the present application, the relevant technical solutions of the electrical connector 40 and the relevant technical solutions of the battery protection board area 23 are not independent of each other, but can be combined with each other to form different implementation methods to adapt to different scenarios.
[0046] In summary, the embodiment of the present application provides an integrated current board which is assembled from at least a main board area 21, a sub-board area 22 and a battery protection board area 23, which can save the main FPC and main BTB mounting connected to the main board area 21, the sub-FPC and sub-BTB mounting connected to the sub-board area 22, and the battery FPC and battery BTB mounting connected to the battery body 30, thereby reducing the number of FPCs and BTBs used, and can also increase the wiring area and wiring space of the main board area 21 and the sub-board area 22, so as to provide more space for accommodating a battery body 30 with a larger capacity; it can also save the use of BTBs to reduce the structural and assembly complexity, make the assembly process simpler, and help reduce costs.
[0047] In addition, by using an integrated circuit board 20 , the battery protection board area 23 can be directly electrically connected to the main board area 21 and the auxiliary board area 22 , thereby reducing the path of the battery FPC and simplifying the connection method with the battery body 30 .
[0048] Of course, the integrated circuit board 20 can be assembled at one time, compared to separately assembling the main board area 21, the sub-board area 22 and the battery protection board area 23, so as to improve the production line patch 50 and assembly efficiency and reduce the assembly cost.
[0049] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.
Claims
1. An electronic device, characterized in that: include: A device body (10), a circuit board (20), a battery body (30), and an electrical connector (40); The circuit board (20) is arranged on the device body (10), and comprises an electrically connected main board area (21), a secondary board area (22), and a battery protection board area (23); The circuit board (20) is provided with an installation space, and the battery body (30) is arranged in the installation space; The electrical connector (40) is connected between the battery protection plate area (23) and the battery body (30).
2. The electronic device according to claim 1, characterized in that: The main board area (21), the battery protection board area (23) and the auxiliary board area (22) are arranged in sequence on the circuit board (20); The battery body (30) is located between the battery protection plate area (23) and the auxiliary plate area (22).
3. The electronic device according to claim 1 or 2, characterized in that: The circuit board (20) is provided with a groove (25) between the battery protection board area (23) and the auxiliary board area (22), and the battery body (30) is arranged in the installation space provided in the groove (25); A side of the groove (25) close to the battery protection plate area (23) is provided with an avoidance hole (26); the electrical connector (40) is passed through the avoidance hole (26) and is in contact with the battery protection plate area (23) and the battery body (30) respectively.
4. The electronic device according to claim 3, characterized in that: The groove (25) comprises a bottom wall (251) and a plurality of side walls (252) arranged around the bottom wall (251), wherein the bottom wall (251) and the plurality of side walls (252) together enclose the installation space; The bottom wall (251) and at least one of the plurality of side walls (252) are used for wiring.
5. The electronic device according to claim 3, characterized in that: The groove (25) comprises a plurality of side walls (252), and the plurality of side walls (252) together enclose the installation space; At least one of the side walls (252) is used for wiring.
6. The electronic device according to claim 1, characterized in that: A first electrical connection portion (241) and a second electrical connection portion (242) are provided on one side of the battery protection plate area (23) close to the battery body (30); The first electrical connection part (241) is electrically connected to the positive electrode of the battery body (30) through the electrical connection part (40), and the second electrical connection part (242) is electrically connected to the negative electrode of the battery body (30) through the electrical connection part (40).
7. The electronic device according to claim 6, characterized in that: A first slot (231) and a second slot (232) are provided on one side of the battery protection plate area (23) close to the battery body (30); The first electrical connection portion (241) is disposed in the first slot (231), and the second electrical connection portion (242) is disposed in the second slot (232).
8. The electronic device according to claim 6, characterized in that: The first electrical connection part (241) and the second electrical connection part (242) both comprise a gold layer (2411), a nickel layer (2412) and a copper layer (2413); Along the direction from the battery protection plate area (23) toward the battery body (30), the copper layer (2413), the nickel layer (2412), and the gold layer (2411) are stacked in sequence, and the gold layer (2411) is in contact with the electrical connector (40).
9. The electronic device according to any one of claims 1 to 8, characterized in that: The electrical connector (40) is an elastic member, and the electrical connector (40) elastically abuts between the battery protection plate area (23) and the battery body (30).
10. The electronic device according to claim 9, characterized in that: The electrical connector (40) comprises a first connecting piece (41), an arc-shaped piece (43) and a second connecting piece (42) which are connected in sequence, and at least one of the first connecting piece (41), the second connecting piece (42) and the arc-shaped piece (43) is elastically deformable; The surface of the first connecting piece (41) facing away from the second connecting piece (42) elastically abuts against one of the battery protection plate area (23) and the battery body (30), and one end of the second connecting piece (42) away from the first connecting piece (41) elastically abuts against the other.