Rechargeable battery and electronic equipment

Abstract

The utility model relates to a rechargeable battery and electronic equipment. The rechargeable battery comprises a battery shell, a winding battery cell packaged in the battery shell and a degaussing component accommodated in the battery shell. And a positive pole is arranged on the outer side of the battery shell. The winding battery cell comprises a positive plate and a negative plate which are different in length, the negative plate at the ending end of the winding battery cell comprises an extension section exceeding the positive plate, and the positive plate is connected with a positive lug. The degaussing component is connected with the positive lug and the positive pole, and the degaussing component and the extension section extend in parallel. The scheme can counteract a magnetic field generated when current flows through the extension section, further can reduce and even avoid electromagnetic interference of the extension section on peripheral electronic devices, is simple in process, is not easy to short circuit, and is good in magnetic field counteracting effect.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a rechargeable battery and an electronic device. Background Art

[0002] Taking the TWS (True Wireless Stereo) headphone battery as an example, the battery cell can be a stacked battery cell or a wound battery cell. The wound battery cell is a cell in which the positive electrode sheet, the diaphragm and the negative electrode sheet are sequentially wound and extruded into a cylindrical, elliptical or square shape.

[0003] In the current winding process, in order to avoid lithium plating, the negative electrode sheet is often allowed to extend beyond the positive electrode sheet by a certain length at the end of the wound battery cell. When the battery is charging and discharging, opposite currents flow through the positive and negative electrodes respectively, and the magnetic field generated by the current on the extra negative electrode sheet cannot be offset, which will interfere with the surrounding electronic devices.

[0004] The electromagnetic interference caused by the above reasons can be offset by an external nickel sheet or an external circuit, but the external nickel sheet or external circuit can only be set on the outside of the battery casing. The process is complicated and it is very easy to cause a short circuit. It is also difficult to assemble with the system end, and the effect of offsetting the magnetic field is poor. Summary of the invention

[0005] The present application provides a rechargeable battery and an electronic device, which offset the electromagnetic interference generated by the current on the negative electrode sheet by arranging a component inside the battery housing.

[0006] A rechargeable battery comprising:

[0007] A battery shell, wherein a positive electrode column is provided on the outer side of the battery shell;

[0008] A wound battery cell encapsulated in the battery shell, the wound battery cell comprising a positive electrode sheet and a negative electrode sheet of different lengths, at the end of the wound battery cell, the negative electrode sheet comprises an extended section extending beyond the positive electrode sheet, and the positive electrode sheet is provided with a positive electrode ear; and

[0009] A demagnetizing component is housed inside the battery shell, the demagnetizing component is connected to the positive electrode tab and the positive electrode column, and the demagnetizing component also extends in parallel with the extension section.

[0010] Optionally, the battery further comprises a connecting member which is relatively fixed to the wound battery core, and the demagnetizing member is connected to the connecting member.

[0011] Optionally, the connecting component includes a first sub-component and a second sub-component, the first sub-component is arranged at the core of the wound battery cell and extends along the thickness direction of the wound battery cell, the first sub-component is connected to the positive electrode ear, and the second sub-component connects the first sub-component and the demagnetization component.

[0012] Optionally, the second sub-component is disposed below the wound battery core and connected to the lower end of the first sub-component; and / or

[0013] The demagnetizing component is located below the wound battery core and directly below the extended section.

[0014] Optionally, the second sub-component and the demagnetization component are provided with an insulating layer, and the wound battery core is supported by the second sub-component and the demagnetization component.

[0015] Optionally, the rechargeable battery further comprises a positioning member, one end of which is connected to the second sub-member, and the other end of which is insulated and positioned to fit with the battery shell.

[0016] Optionally, the side wall of the battery shell is provided with a first slot that penetrates along the thickness of the side wall of the battery shell, and the positioning member is inserted into the first slot.

[0017] Optionally, the side wall of the battery shell is provided with a second slot extending through the side wall of the battery shell, the demagnetization member extends from the second slot, one end of the demagnetization member extending out of the battery shell is formed as the positive electrode column, and the demagnetization member is insulated from the battery shell.

[0018] Optionally, the negative electrode sheet is provided with a negative electrode ear, and a negative electrode column is connected to the outside of the battery shell, the negative electrode ear is connected to the negative electrode column, and the battery shell and the negative electrode column have the same potential.

[0019] An electronic device comprises the rechargeable battery as described in any one of the above items.

[0020] The present application provides a rechargeable battery and an electronic device, wherein a demagnetizing component is built into the interior of a battery shell and extends in parallel with an extension section, so that a current in the same direction as that on a positive electrode sheet can flow through the demagnetizing component, and the magnetic field generated by the current on the demagnetizing component can offset the magnetic field generated when current flows through the extension section, thereby reducing or even avoiding the electromagnetic interference of the extension section on surrounding electronic devices. The process is simple and short circuit is not easy, and the effect of offsetting the magnetic field is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a rechargeable battery shown in an exemplary embodiment of the present application;

[0022] Figure 2 yes Figure 1 A schematic diagram of the internal structure of a rechargeable battery shown in;

[0023] Figure 3 It is a schematic diagram of the winding structure of the positive electrode sheet and the negative electrode sheet;

[0024] Figure 4 is a schematic diagram showing a demagnetizing component connected to a connecting component according to an exemplary embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a demagnetizing component and a second subcomponent being located below a wound battery core;

[0026] Figure 6 is a cross-sectional view of the battery case at a location where the degaussing member extends;

[0027] Figure 7 It is a schematic diagram of the connection between the negative electrode ear, the negative electrode sheet and the battery shell. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application.

[0029] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one, and will be separately described if only "one" is referred to. "Multiple" or "several" means two or more. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper", "top", "bottom" are only for the convenience of explanation, and are not limited to one position or one spatial orientation. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0030] Please refer to Figure 1 , Figure 1 FIG. 1 is a schematic diagram of a rechargeable battery 100 according to an exemplary embodiment of the present application.

[0031] The present application provides a rechargeable battery 100 (hereinafter referred to as battery 100), which includes a battery shell 10 and a positive electrode column 20 and a negative electrode column 30 arranged outside the battery shell 10, and the positive electrode column 20 and the negative electrode column 30 are used to connect with an external circuit to form a loop. The battery shell 10 may be uncharged, or the battery shell 10 may be at the same potential as the negative electrode column 30. The battery 100 may be a cylindrical lithium-ion battery, but is not limited thereto.

[0032] Please refer to Figure 2 and Figure 3 , Figure 2 for Figure 1 Schematic diagram of the internal structure of the rechargeable battery 100 is shown in FIG. Figure 3 Schematic diagram of the winding structure of the positive electrode sheet 41 and the negative electrode sheet 42.

[0033] The battery 100 further includes a wound cell 40 encapsulated in the battery case 10, wherein the wound cell 40 includes a positive electrode sheet 41 and a negative electrode sheet 42 of different lengths, and the positive electrode sheet 41 and the negative electrode sheet 42 are separated by a separator ( Figure 3 The positive electrode sheet 41 is connected to a positive electrode ear, and the negative electrode sheet 42 is provided with a negative electrode ear. The positive electrode ear is connected to the positive electrode column 20, and the negative electrode ear is connected to the negative electrode column 30. At the end of the wound battery cell 40, the negative electrode sheet 42 includes an extension section 420 extending beyond the positive electrode sheet 41. During the charge and discharge process of the battery 100, the direction A1 of the current flowing through the positive electrode sheet 41 is opposite to the direction A2 of the current flowing through the negative electrode sheet 42 (refer to Figure 3 ).

[0034] The battery 100 further includes a degaussing member 50 received in the battery shell 10, the degaussing member 50 is connected to the positive electrode ear and the positive electrode column 20, for positive current to flow through, and extends in parallel with the extension section 420. In this embodiment, the extension section 420 and the degaussing member 50 are both arc-shaped structures.

[0035] According to the above description, the demagnetization component 50 is built into the battery shell 10 and extends in parallel with the extension section 420. In this way, a current in the same direction as that on the positive electrode 41 can flow through the demagnetization component 50, and the magnetic field generated by the current on the demagnetization component 50 can offset the magnetic field generated when the current flows through the extension section 420, thereby reducing or even avoiding the electromagnetic interference of the extension section 420 to the surrounding electronic devices. Compared with external nickel sheets or circuits, the process is simple and not easy to short-circuit, and the effect of offsetting the magnetic field is good.

[0036] In one embodiment, an insulating plate may be disposed inside the battery housing 10 , and the degaussing member 50 may be supported or fixed by the insulating plate, so that the degaussing member 50 is connected to the positive electrode tab and extends in parallel with the extension section 420 .

[0037] In this embodiment, the battery 100 further includes a connecting member 51 that is relatively fixed to the wound battery cell 40, and the demagnetizing member 50 is connected to the connecting member 51. In this configuration, the connecting member 51 is connected to the wound battery cell 40 and is also connected to the demagnetizing member 50, thereby achieving the stability of the position of the demagnetizing member 50 and reliably achieving the parallel extension of the demagnetizing member 50 and the extension section 420. Among them, the connecting member 51 can be insulated from the positive electrode ear, and the demagnetizing member 50 is directly connected to the positive electrode ear. The specific setting position of the connecting member 51 is not limited.

[0038] Please combine Figure 2 and Figure 4 , Figure 4 It is a schematic diagram showing a demagnetizing component 50 connected to a connecting component 51 according to an exemplary embodiment of the present application.

[0039] In one embodiment, the connecting member 51 is connected to the positive electrode ear, and the demagnetizing member 50 is connected to the positive electrode ear through the connecting member 51. Specifically, the connecting member 51 includes a first sub-member 511 and a second sub-member 512. The first sub-member 511 is arranged at the core of the wound battery core 40 and extends along the thickness direction ( Figure 1 In the Z direction). Figure 1 In the illustrated embodiment, the thickness direction of the wound battery core 40 is consistent with the height direction of the battery case 10 .

[0040] The first subcomponent 511 is connected to the positive pole ear, and the connection method can be laser welding. Among them, the first subcomponent 511 can be made of rod material, and the wound battery cell 40 can be wound around the first subcomponent 511. The second subcomponent 512 connects the first subcomponent 511 and the demagnetization component 50, and the connection method includes but is not limited to welding, riveting or bolting. The second subcomponent 512 can be made of sheet material. In this solution, the first subcomponent 511 is connected to the positive pole ear, which not only realizes the relative fixation of the first subcomponent 511 and the wound battery cell 40, but also realizes the conduction between the demagnetization component 50 and the positive pole ear. In addition, the first subcomponent 511 is arranged at the core of the wound battery cell 40, so that the first subcomponent 511 occupies less space inside the battery shell 10.

[0041] Please refer to Figure 5 , Figure 5 It is a schematic diagram showing that the demagnetizing component 50 and the second sub-component 512 are located below the wound battery core 40 .

[0042] The second sub-component 512 can be connected to the upper end or the lower end of the first sub-component 511, such as Figure 5 As shown, in this embodiment, the latter is adopted. The second sub-component 512 is located below the wound battery cell 40. In this way, during the assembly process of the battery 100, the second sub-component 512 can provide support for the wound battery cell 40, making it convenient to take the wound battery cell 40. It should be noted that in this embodiment, the demagnetization component 50 is also configured as a sheet, which is located in the same plane as the second sub-component 512, located below the wound battery cell 40, and also located directly below the extension section 420, so that space can be saved and the compactness of the structure can be improved. Of course, in some other embodiments, the second sub-component 512 can be arranged around the outside of the extension section 420.

[0043] In order to prevent the second sub-component 512 and the demagnetizing component 50 from short-circuiting when in contact with the negative electrode plate 42, an insulating layer may be provided on the second sub-component 512 and the demagnetizing component 50. The insulating layer may be insulating glue attached to the second sub-component 512 and the demagnetizing component 50, but is not limited thereto.

[0044] In one embodiment, Figure 4 As shown, the battery 100 further includes a positioning member 52, one end of which is connected to the second sub-member 512, and the other end of which is insulated and positioned with the battery shell 10. In this way, by positioning the positioning member 52 and the battery shell 10, the stability of the relative position of the demagnetization member 50 and the extension section 420 can be further ensured, the position of the demagnetization member 50 can be prevented from moving, and the ability of the demagnetization member 50 to offset the magnetic field generated by the extension section 420 can be improved.

[0045] The manner in which the positioning member 52 is positioned and matched with the battery shell 10 is not limited. For example, a slot can be provided on the battery shell 10, and the positioning member 52 is inserted into the slot to achieve positioning. Specifically, the side wall of the battery shell 10 is provided with a first slot 11 that runs through its thickness, and the positioning member 52 is inserted into the first slot 11 to be positioned and matched with the battery shell 10. The positioning structure is simple and the positioning is reliable. It should be noted that one end of the positioning member 52 that is positioned and matched with the battery shell 10 is insulated, so no current passes through the positioning member 52. Of course, the positioning member 52 can also be made of insulating material.

[0046] The positioning member 52 can be connected to the second sub-member 512 through a connecting structure. Figure 4 In the embodiment shown, the demagnetizing member 50, the second sub-member 512 and the positioning member 52 are an integrated structure, and the three are formed at one time by stamping. The end of the positioning member 52 that is positioned and matched with the battery shell 10 is insulated to prevent current from flowing through the positioning member 52.

[0047] Please combine Figure 1 and Figure 6 , Figure 6 1 is a cross-sectional view of the battery case 10 at a location where the degaussing member 50 is extended.

[0048] In one embodiment, the degaussing member 50 extends from the battery case 10, one end of the extension is formed as the positive electrode column 20, and the degaussing member 50 is insulated from the battery case 10. Figure 6 In the illustrated embodiment, the side wall of the battery shell 10 is provided with a second slot 12 that runs through the thickness of the battery shell 10, and the demagnetizing member 50 extends from the second slot 12. The second slot 12 can be hot-pressed with an insulating ring 13, so that the insulating ring 13 fits well with the battery shell 10 at the second slot 12, which not only plays a sealing role to prevent electrolyte leakage, but also plays an insulating role. It should be noted that the same structure as above can also be used at the first slot 11 to ensure that the positioning member 52 is insulated from the battery shell 10, and at the same time, a seal is achieved at the first slot 11. The first slot 11 and the second slot 12 can be set 180° apart, but are not limited to this.

[0049] Please refer to Figure 7 , Figure 7 Schematic diagram of the connection between the negative electrode ear, the negative electrode sheet 42 and the battery case 10.

[0050] The negative electrode sheet 42 is connected to a negative electrode ear 421, and the negative electrode ear 421 is connected to the negative electrode column 30, and the battery shell 10 and the negative electrode column 30 are at the same potential. Figure 7 In the illustrated embodiment, the negative electrode ear 421 is connected to the battery case 10 through the negative electrode pin 60, and further connected to the negative electrode column 30, so as to realize the transmission of negative electrode polarity.

[0051] The positive electrode column 20 and the negative electrode column 30 may be provided with connection holes respectively, through which fasteners pass to achieve connection with an external circuit for easy disassembly. The external circuit may be a circuit board, etc. The battery case 10 may include a lower case and an upper cover, and the lower case and the upper cover may be connected by welding.

[0052] The present application also provides an electronic device, which includes the battery 100 as described above. The electronic device includes but is not limited to a mobile phone, a tablet computer, and a wearable device. The battery 100 includes but is not limited to a button battery.

[0053] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A rechargeable battery, characterized in that: include: A battery shell, wherein a positive electrode column is provided on the outer side of the battery shell; A wound battery cell encapsulated in the battery shell, the wound battery cell comprising a positive electrode sheet and a negative electrode sheet of different lengths, at the end of the wound battery cell, the negative electrode sheet comprises an extended section extending beyond the positive electrode sheet, and the positive electrode sheet is connected to a positive electrode ear; and A demagnetizing component is housed inside the battery shell, the demagnetizing component is connected to the positive electrode tab and the positive electrode column, and the demagnetizing component also extends in parallel with the extension section.

2. The rechargeable battery according to claim 1, characterized in that: The battery further includes a connecting member that is relatively fixed to the wound battery core, and the demagnetizing member is connected to the connecting member.

3. The rechargeable battery according to claim 2, characterized in that: The connecting component includes a first sub-component and a second sub-component. The first sub-component is arranged at the core of the wound battery core and extends along the thickness direction of the wound battery core. The first sub-component is connected to the positive electrode ear. The second sub-component connects the first sub-component and the demagnetizing component.

4. The rechargeable battery according to claim 3, characterized in that: The second sub-component is disposed below the wound battery core and connected to the lower end of the first sub-component; and / or The demagnetizing component is located below the wound battery core and directly below the extended section.

5. The rechargeable battery according to claim 3, characterized in that: The second sub-component and the demagnetizing component are provided with an insulating layer, and the wound battery core is supported by the second sub-component and the demagnetizing component.

6. The rechargeable battery according to claim 3, characterized in that: The rechargeable battery further includes a positioning component, one end of which is connected to the second sub-component, and the other end of which is insulated and positioned to fit with the battery shell.

7. The rechargeable battery according to claim 6, characterized in that: The side wall of the battery shell is provided with a first slot which penetrates through the side wall along the thickness of the battery shell, and the positioning member is inserted into the first slot.

8. The rechargeable battery according to any one of claims 1 to 7, characterized in that: The side wall of the battery shell is provided with a second slot extending through the thickness thereof, the demagnetizing member extends from the second slot, one end of the demagnetizing member extending out of the battery shell is formed as the positive pole, and the demagnetizing member is insulated from the battery shell.

9. The rechargeable battery according to any one of claims 1 to 7, characterized in that: The negative electrode sheet is connected with a negative electrode ear, and a negative electrode column is also arranged on the outside of the battery shell. The negative electrode ear is connected with the negative electrode column, and the battery shell and the negative electrode column have the same potential.

10. An electronic device, characterized in that: The electronic device comprises the rechargeable battery according to any one of claims 1 to 9.

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