Battery structure and electronic equipment

Abstract

This application discloses a battery structure and electronic device, relating to the field of batteries. A battery structure includes: a battery cell unit and a circuit board; the battery cell unit includes a cell body and a bonding plate, the electrodes of the cell body being connected to the bonding plate; the bonding plate and the circuit board are detachably connected. This application can solve problems such as inconvenient battery assembly and disassembly.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, specifically relating to a battery structure and electronic device. Background Technology

[0002] Currently, batteries in some electronic devices typically adopt an integrated design, where the logo and bracket form the outer casing, and the battery cells and protection circuit modules are installed inside the casing. The advantages of such batteries are high consistency and high space utilization.

[0003] The battery cells and protection circuit modules are primarily connected via laser welding. Laser-welded structures are relatively stable and can withstand a tensile force of at least 25N in a 90° direction. This structure also means that even if only one battery cell fails, users often lack the ability to disassemble and replace the faulty cell, thus causing inconvenience for battery repair or replacement. Utility Model Content

[0004] The purpose of this application is to provide a battery structure and electronic device that can solve problems such as inconvenience in battery installation and removal.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a battery structure, including: a battery cell unit and a circuit board; The battery cell unit includes a battery cell body and a bonding plate, and the electrodes of the battery cell body are connected to the bonding plate; The bonding plate is detachably connected to the circuit board.

[0006] This application also provides an electronic device including the battery structure described above.

[0007] In this embodiment, the electrodes of the battery cell body are connected to the bonding plate to achieve signal transmission. The detachable connection between the bonding plate and the circuit board allows the battery cell unit to be combined or separated from the circuit board, thereby facilitating the assembly and disassembly of the battery cell unit. Compared with the method of fixing the battery cell and the protection circuit module by laser welding, this embodiment can facilitate the repair or replacement of the battery structure. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the battery structure disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the battery structure disclosed in the embodiments of this application without the battery cell body; Figure 3 This is a schematic diagram of the circuit board and bonding board disclosed in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the battery cell unit disclosed in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the bonding plate disclosed in the embodiments of this application.

[0009] Explanation of reference numerals in the attached figures: 10-Cell unit; 11-Cell body; 111-Electrode; 12-Connecting plate; 121-Rigid plate; 1211-Pattern; 122-Flexible plate; 1221-First connecting section; 1222-Second connecting section; 1223-Third connecting section; 123-First connector; 20 - Circuit board; 21 - Second connector; 22 - Opening; 30 - Flexible connecting plate. Detailed Implementation

[0010] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0011] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0012] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0013] refer to Figures 1 to 5 This application discloses a battery structure, which includes a cell unit 10 and a circuit board 20. The circuit board 20 can be a protective board for the battery structure to protect it.

[0014] The battery cell unit 10 includes a battery cell body 11 and a bonding plate 12, with the electrodes 111 of the battery cell body 11 connected to the bonding plate 12. The battery cell body 11 can be used to store or release electrical energy; the bonding plate 12 connects the battery cell body 11 to a circuit board 20 to enable signal transmission between the battery cell body 11 and the circuit board 20. For example, the battery cell body 11 can transmit electrical energy signals to the circuit board 20, and the circuit board 20 can transmit control signals, detection signals, etc., to the battery cell.

[0015] Furthermore, the connecting plate 12 and the circuit board 20 are detachably connected, which facilitates the assembly and disassembly of the connecting plate 12 and the circuit board 20.

[0016] Based on the above settings, in this embodiment of the application, the electrode 111 of the cell body 11 is connected to the bonding plate 12 to realize signal transmission. Through the detachable connection between the bonding plate 12 and the circuit board 20, the cell unit 10 and the circuit board 20 can be combined or separated, thereby facilitating the assembly and disassembly of the cell unit 10. Compared with the method of fixing the cell and the protection circuit module by laser welding, this embodiment of the application can facilitate the repair or replacement of the battery structure.

[0017] refer to Figure 2 and Figure 3 In some embodiments, the bonding plate 12 may include a rigid plate 121 and a flexible plate 122. The electrodes 111 of the battery cell body 11 are connected to the rigid plate 121. Optionally, the electrodes 111 of the battery cell body 11 may be welded or bonded to the rigid plate 121, and the electrodes 111 of the battery cell body 11 are also electrically connected to the rigid plate 121 to facilitate signal transmission.

[0018] For example, the battery cell body 11 may have a positive electrode and a negative electrode. Correspondingly, the rigid plate 121 may be provided with a positive electrode connection point and a negative electrode connection point, so that the positive electrode can be soldered or bonded to the positive electrode fixed point and the negative electrode can be soldered or bonded to the negative electrode fixed point, thereby ensuring the reliability and stability of the connection and further ensuring the stability of signal transmission.

[0019] One end of the flexible plate 122 is connected to the rigid plate 121. Optionally, one end of the flexible plate 122 can be welded or glued to the rigid plate 121, and one end of the flexible plate 122 is also electrically connected to the rigid plate 121 to facilitate signal transmission.

[0020] The other end of the flexible plate 122 is detachably connected to the circuit board 20. This allows for easy assembly or disassembly of the connecting plate 12 and the circuit board 20, facilitating the assembly and disassembly of the connecting plate 12 and further simplifying the assembly and disassembly of the battery cell unit 10. Optionally, the other end of the flexible plate 122 and the circuit board 20 can be connected by a plug-in or snap-fit ​​mechanism. Of course, other detachable connection methods can also be used, as long as the reliability and stability of the mechanical and electrical connections are guaranteed. The specific method is not limited.

[0021] refer to Figure 3 In some more specific embodiments, the other end of the flexible board 122 may be provided with a first connector 123, and correspondingly, the circuit board 20 may be provided with a second connector 21, and the second connector 21 is inserted and engaged with the first connector 123. Based on this arrangement, the insertion and engagement of the first connector 123 and the second connector 21 can ensure both the stability and reliability of the mechanical connection between the other end of the flexible board 122 and the circuit board 20, and also the stability and reliability of the signal transmission between the other end of the flexible board 122 and the circuit board 20.

[0022] To facilitate the assembly of the bonding plate 12 and the circuit board 20, the edge of the circuit board 20 may be provided with an opening 22, and the rigid plate 121 may be embedded in the opening 22 of the circuit board 20, such as... Figure 2 and Figure 3 As shown, after the bonding plate 12 and the circuit board 20 are assembled, interference between the rigid plate 121 and the circuit board 20 can be avoided. Furthermore, the opening 22 provides space for the rigid plate 121. Compared to the method of stacking the rigid plate 121 and the circuit board 20, it is beneficial to reduce the overall thickness of the bonding plate 12 and the circuit board 20 after assembly, and further reduce the overall volume of the battery structure.

[0023] One end of the flexible board 122 can be connected to the edge face of the rigid board 121 and extend a distance away from the rigid board 121 so that the other end of the flexible board 122 can extend out of the opening 22 and be connected to the circuit board 20.

[0024] The other end of the flexible plate 122 extends to one side of the circuit board 20 along the thickness direction, so that the other end of the flexible plate 122 can be connected to one side of the circuit board 20 along the thickness direction.

[0025] Furthermore, the first connector 123 can be disposed on the side of the flexible plate 122 facing the circuit board 20, and the second connector 21 can be disposed on the surface of the circuit board 20 facing the flexible plate 122. Based on this, when the first connector 123 and the second connector 21 are plugged in, the other end of the flexible plate 122 can be located on the side of the circuit board 20. Compared with the entire connecting plate 12 being located on the side of the circuit board 20, the other end of the flexible plate 122 being located on the side of the circuit board 20 can help reduce the space occupied by the flexible plate 122 on the surface of the circuit board 20, thereby providing more space for electrical components on the surface of the circuit board 20. In addition, this connection method can also help improve the reliability and stability of the connection between the first connector 123 and the second connector 21.

[0026] It should be noted that in the above connection method, the insertion direction of the first connector 123 and the second connector 21 is the thickness direction of the circuit board 20, and the rigid plate 121 is located in the opening 22. It is set along the extension direction of the circuit board 20 and perpendicular to the thickness direction. In this way, even if the connecting plate 12 and the circuit board 20 are subjected to a force along the extension direction of the board surface, the first connector 123 and the second connector 21 will not be separated, thereby ensuring the reliability and stability of the connection.

[0027] Optionally, the cross-sectional area of ​​the opening 22 is larger than the cross-sectional area of ​​the rigid plate 121 to ensure that the rigid plate 121 can be inserted into the opening 22 more smoothly; of course, the difference between the cross-sectional area of ​​the opening 22 and the cross-sectional area of ​​the rigid plate 121 should not be too large to prevent the rigid plate 121 from moving significantly in the opening 22 and affecting its installation stability.

[0028] For example, the rigid plate 121 and the opening 22 can be fitted with a transition fit or a clearance fit, which facilitates the installation of the rigid plate 121 and ensures the installation stability of the rigid plate 121.

[0029] In some embodiments, the edge of the circuit board 20 may be provided with multiple openings 22. Correspondingly, the battery structure may include multiple battery cell power supplies, and the rigid plate 121 of each battery cell unit 10 is embedded in the corresponding opening 22. Based on this, multiple battery cell units 10 can be connected to the circuit board 20 respectively.

[0030] For example, the circuit board 20 can be a rectangular board, and multiple openings 22 can be opened at the edge of each long side of the rectangular board. The multiple openings 22 are spaced apart along the long side of each side. In addition, the openings 22 on both sides can be correspondingly arranged to improve the uniformity of the arrangement of the battery cells 10.

[0031] In some more specific embodiments, the openings 22 on both sides of the circuit board 20 are symmetrically arranged, and a plate portion is provided between the two symmetrically arranged openings 22. Two second connectors 21 can be provided at the plate portion. Correspondingly, the first connector 123 at the other end of the flexible plate 122 of the two side connecting plates 12 can be connected to the two second connectors 21 respectively. In this way, the utilization rate of the board surface space of the circuit board 20 can be improved, which is conducive to reducing the width of the circuit board 20.

[0032] Considering that one end of the flexible board 122 is connected to the edge face of the rigid board 121 located in the opening 22, and the other end of the flexible board 122 is connected to the board surface located on the circuit board 20, the flexible board 122 may include a first connecting segment 1221, a second connecting segment 1222, and a third connecting segment 1223 connected in sequence, such as... Figure 5 As shown. The first connecting segment 1221, at one end facing away from the second connecting segment 1222, is connected to the edge face of the rigid plate 121. The second connecting segment 1222 is angled to the first connecting segment 1221 and extends along the thickness direction of the circuit board 20, so that the end of the second connecting segment 1222 facing away from the first connecting segment 1221 can extend out an opening 22. The third connecting segment 1223 is angled to the second connecting segment 1222 and extends along the surface direction of the circuit board 20 to facilitate connection to the surface of the circuit board 20.

[0033] Based on the above configuration, the angle between the second connecting segment 1222 and the first connecting segment 1221 and the angle between the third connecting segment 1223 and the second connecting segment 1222 can enable the flexible plate 122 to turn on both sides, thereby adapting to the relative positional relationship between the rigid plate 121 and the circuit board 20, allowing the flexible plate 122 to extend along the circuit board 20, which helps to reduce the space occupied by the flexible plate 122 on the circuit board 20.

[0034] For example, the second connecting segment 1222 and the first connecting segment 1221 can form a 90° angle, and the third connecting segment 1223 and the second connecting segment 1222 can form a 90° angle. Of course, the two angles can also fluctuate around 90°, such as greater than 85° and less than 95°, to reduce the risk of the flexible plate 122 breaking.

[0035] In some embodiments, the flexible plate 122 has a reserved gap between the plate surface of the circuit board 20 facing the third connecting section 1223 and the plate surface of the circuit board 20 facing the flexible plate 122. This reserved gap can provide a accommodating space for the first connector 123 and the second connector 21 to ensure that the first connector 123 and the second connector 21 can be smoothly inserted and mated, and to prevent the first connector 123 and the second connector 21 from being inserted at an angle.

[0036] Optionally, the reserved gap can range from 0.5mm to 1.0mm, including, for example, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, etc., and of course, other values ​​are also possible, without specific limitations here. Based on this, space loss can be reduced, and it can also act as a heat dissipation channel, which is beneficial to improving the thermal stability of the battery structure.

[0037] In some embodiments, the rigid plate 121 may be provided with a contact piece 1211, and the electrode 111 of the cell body 11 is welded and fixed to the contact piece 1211. In this way, the reliability and stability of the mechanical connection between the cell body 11 and the rigid plate 121 can be guaranteed, and the reliability and stability of the electrical connection between the cell body 11 and the rigid plate 121 can be achieved, thus ensuring stable signal transmission.

[0038] In some embodiments, the tab 1211 may be disposed within one side of the rigid plate 121, and a reserved distance is provided between the edge of the tab 1211 and the edge of the plate, so that copper foil can be laid to make the bonding plate 12.

[0039] For example, the reserved distance may include a horizontal distance and a vertical distance, wherein the horizontal distance may be greater than or equal to 1.2 mm and the vertical distance may be greater than or equal to 0.5 mm. The horizontal direction can be understood as the length direction of the rigid board 121, and the vertical direction can be understood as the width direction of the rigid board 121.

[0040] Furthermore, in the longitudinal direction, one end of the flexible plate 122 is connected to the edge face of the rigid plate 121, and the reserved distance between the edge of the contact piece 1211 and the edge of the rigid plate 121 on the side closer to the flexible plate 122 can be greater than or equal to 1.3 mm, while the reserved distance between the edge of the contact piece 1211 and the edge of the rigid plate 121 on the side away from the flexible plate 122 can be greater than or equal to 0.5 mm, so as to facilitate the laying of copper foil on the surface of the rigid plate 121.

[0041] Alternatively, the contact pad 1211 can be replaced with a solder pad or other components, as long as it can provide a stable connection, and the specific form is not limited.

[0042] It should be noted that in this embodiment of the application, one end of the flexible plate 122 is connected to the edge end face of the rigid plate 121, rather than to the surface of the rigid plate 121, which can provide a sufficiently large setting space for the contact piece 1211.

[0043] refer to Figure 1 and Figure 2In some embodiments, the battery structure may also include a flexible connecting plate 30, one end of which is connected to the circuit board 20, and the other end of which is used to connect to other components of the electronic device, such as the motherboard, to facilitate signal transmission.

[0044] Based on the above battery structure, this application also discloses an electronic device, which includes the above battery structure. The electronic device can be a tablet computer, laptop computer, e-reader, mobile phone, or other devices, and is not specifically limited here.

[0045] In summary, the embodiments of this application can facilitate the convenient replacement or repair of the battery cell unit 10, thereby enabling the possibility of recycling the battery cell unit 10 and reducing material waste.

[0046] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A battery structure, characterized in that, include: Battery cell unit (10) and circuit board (20); The battery cell unit (10) includes a battery cell body (11) and a bonding plate (12), wherein the electrodes (111) of the battery cell body (11) are connected to the bonding plate (12); The bonding plate (12) is detachably connected to the circuit board (20).

2. The battery structure according to claim 1, characterized in that, The bonding plate (12) includes a rigid plate (121) and a flexible plate (122). The electrode (111) of the battery cell body (11) is connected to the rigid plate (121). One end of the flexible plate (122) is connected to the rigid plate (121), and the other end of the flexible plate (122) is detachably connected to the circuit board (20).

3. The battery structure according to claim 2, characterized in that, The other end of the flexible plate (122) is provided with a first connector (123); The circuit board (20) is provided with a second connector (21), which is inserted into the first connector (123).

4. The battery structure according to claim 3, characterized in that, The circuit board (20) has an opening (22) at its edge, and the rigid plate (121) is embedded in the opening (22). One end of the flexible plate (122) is connected to the edge end face of the rigid plate (121), and the other end of the flexible plate (122) extends to one side of the circuit board (20) along the thickness direction; The first connector (123) is located on one side of the flexible plate (122) facing the circuit board (20), and the second connector (21) is located on the surface of the circuit board (20) facing the flexible plate (122).

5. The battery structure according to claim 4, characterized in that, The circuit board (20) has multiple openings (22) on its edge; The battery structure includes a plurality of the battery cells (10), and the rigid plate (121) of each battery cell (10) is embedded in the corresponding opening (22).

6. The battery structure according to any one of claims 2 to 5, characterized in that, The flexible plate (122) includes a first connecting segment (1221), a second connecting segment (1222), and a third connecting segment (1223) connected in sequence. The end of the first connecting segment (1221) facing away from the second connecting segment (1222) is connected to the edge end face of the rigid plate (121); The second connecting segment (1222) is set at an angle to the first connecting segment (1221) and extends along the thickness direction of the circuit board (20); The third connecting segment (1223) is set at an angle to the second connecting segment (1222) and extends along the board surface direction of the circuit board (20).

7. The battery structure according to claim 6, characterized in that, The flexible plate (122) has a reserved gap between the plate surface facing the circuit board (20) at the third connecting section (1223) and the plate surface facing the flexible plate (122) of the circuit board (20).

8. The battery structure according to claim 2, characterized in that, The rigid plate (121) is provided with a contact plate (1211), and the electrode (111) of the battery cell body (11) is welded and fixed to the contact plate (1211).

9. The battery structure according to claim 8, characterized in that, The contact piece (1211) is located within one side of the rigid plate (121), and a reserved distance is provided between the edge of the contact piece (1211) and the edge of the plate.

10. An electronic device, characterized in that, Includes the battery structure described in any one of claims 1 to 9.

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