Soft package battery and earphone

Abstract

The utility model discloses a soft package battery and an earphone. The soft package battery is applied to the earphone and comprises a battery shell, a battery cell and a flexible circuit board, the battery cell is arranged in the battery shell and comprises a positive plate and a negative plate; the flexible circuit board comprises a demagnetizing part, a first connecting part and a second connecting part, and the demagnetizing part is connected between the first connecting part and the second connecting part; wherein the first connecting part is electrically connected to the negative plate; the battery shell comprises a first power supply end and a second power supply end, the positive plate is electrically connected to the first power supply end, and the second connecting part is connected to the second power supply end; wherein the first power supply end and the second power supply end are used for supplying power to the earphone. The soft package battery provided by the utility model can reduce the bottom noise generated by the magnetic field of the soft package battery, thereby improving the playing quality of the earphone.

Description

Technical Field

[0001] The utility model relates to the technical field of earphone noise reduction, in particular to a soft-pack battery and an earphone. Background Art

[0002] Flexible Printed Circuit (FPC) refers to a conductive circuit board used to connect electronic devices or components. Soft-pack batteries are widely used in some wireless headphones or portable headphones. However, the magnetic field generated by the soft-pack battery when working may interfere with the electronic components and magnetic components in the headphones, thereby affecting the sound quality and performance of the headphones. In order to solve this problem, steel-shell disc batteries are used in related technologies to reduce magnetic field interference and eliminate background noise. However, steel-shell disc batteries are expensive and large in size, which may take up more headphone space.

[0003] Therefore, how to reduce the background noise generated by the magnetic field of the soft-pack battery and thus improve the playback quality of headphones has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a soft-pack battery and earphones, which can reduce the background noise generated by the magnetic field of the soft-pack battery, thereby improving the playback quality of the earphones.

[0005] A soft-pack battery according to the first embodiment of the utility model is applied to earphones, and comprises a battery housing, a battery cell and a flexible circuit board;

[0006] The battery cell is arranged inside the battery housing, and the battery cell comprises a positive electrode sheet and a negative electrode sheet;

[0007] The flexible circuit board comprises a demagnetizing portion, a first connecting portion and a second connecting portion, wherein the demagnetizing portion is connected between the first connecting portion and the second connecting portion; wherein the first connecting portion is electrically connected to the negative electrode sheet;

[0008] The battery housing includes a first power supply end and a second power supply end, the positive electrode sheet is electrically connected to the first power supply end, and the second connecting portion is connected to the second power supply end; wherein the first power supply end and the second power supply end are used to power the earphone.

[0009] According to the soft-pack battery of the embodiment of the utility model, there are at least the following beneficial effects: the battery housing, battery cells and flexible circuit board are integrated into a soft-pack battery, which helps to reduce the number and complexity of components inside the earphone, thereby saving earphone space. In addition, the use of battery cells is generally safer than the use of stacked battery cells because the winding structure can better withstand internal pressure and reduce the risk of short circuit and thermal runaway. The use of a battery housing can protect the internal battery cells from physical damage, which can improve the durability of the soft-pack battery, thereby increasing the service life of the soft-pack battery. The use of a flexible circuit board means that the soft-pack battery can be designed to adapt to the complex shape of the interior of the earphone, which helps to improve the compatibility of the soft-pack battery with the internal structure of the earphone. The first connecting portion of the flexible circuit board is electrically connected to the negative electrode sheet, and the second connecting portion of the flexible circuit board is connected to the second power supply end (i.e., the negative electrode) of the battery housing. The degaussing part of the flexible circuit board is connected between the first connecting part and the second connecting part. The degaussing part is used to connect the negative electrode of the soft-pack battery and the negative electrode plate of the battery cell. It can generate a current and a magnetic field in the opposite direction to the magnetic field of the battery cell to offset the magnetic field interference of the battery cell, effectively reduce the background noise generated by the magnetic field interference of the soft-pack battery on the earphone, and thus improve the playback quality of the earphone.

[0010] According to some embodiments of the present invention, the battery housing is in a first shape, and the negative electrode sheet is in a second shape that matches the first shape.

[0011] According to some embodiments of the present invention, the battery casing is cylindrical, and the negative electrode sheet is wound into a spiral shape coaxial with the cylindrical battery casing.

[0012] According to some embodiments of the utility model, the demagnetization portion of the flexible circuit board is in a sector ring shape, and the sector ring-shaped demagnetization portion is coaxially arranged with the negative electrode sheet.

[0013] According to some embodiments of the present invention, the battery housing further includes a welding portion, and the welding portion is connected to the spiral negative electrode sheet.

[0014] According to some embodiments of the present invention, the curvature of the demagnetizing portion is the same as the winding curvature of the battery core.

[0015] According to some embodiments of the present invention, the positive electrode sheet is wound into a spiral shape coaxial with the negative electrode sheet.

[0016] According to some embodiments of the present invention, the arc length of the demagnetization portion is a first length, and the first length is equal to the difference between the lengths of the negative electrode sheet and the positive electrode sheet.

[0017] According to some embodiments of the present invention, the battery cell further includes a diaphragm, wherein the diaphragm is located between the positive electrode sheet and the negative electrode sheet, and the diaphragm is used to separate the positive electrode sheet from the negative electrode sheet.

[0018] The utility model also provides an earphone with the soft pack battery.

[0019] The earphone according to the second embodiment of the present invention includes:

[0020] A soft-pack battery, wherein the soft-pack battery is the soft-pack battery described in the embodiment of the first aspect.

[0021] The earphones according to the embodiments of the utility model have at least the following beneficial effects: the earphones adopt the above-mentioned soft-pack battery, which can adapt to the compact space requirements of the earphones and provide sufficient energy without significantly increasing the volume or weight of the earphones. The connection relationship between the flexible circuit board of the soft-pack battery and the battery shell and the battery cell can reduce the background noise generated by the magnetic field of the soft-pack battery, thereby improving the playback quality of the earphones.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 A schematic diagram of the structure of a soft-pack battery in some embodiments of the utility model;

[0025] Figure 2A A schematic diagram of a flexible circuit board according to some embodiments of the present utility model;

[0026] Figure 2B A cross-sectional view of a flexible circuit board according to some embodiments of the present utility model;

[0027] Figure 3 A top view of a soft-pack battery of some embodiments of the utility model;

[0028] Figure 4 Another top view of a soft-pack battery according to some embodiments of the present invention;

[0029] Figure 5 A side view of a soft-pack battery of some embodiments of the present utility model;

[0030] Figure 6 A bottom view of a soft-pack battery of some embodiments of the utility model;

[0031] Figure 7 It is a schematic diagram of an exploded view of a soft-pack battery in some embodiments of the present invention.

[0032] Figure numerals: soft-pack battery 100, battery cell 110, flexible circuit board 120, battery housing 130, positive electrode sheet 111, negative electrode sheet 112, demagnetization part 121, first connecting part 122, second connecting part 123, first power supply terminal 131, second power supply terminal 132, welding part 133. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of the first or the second, it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Noise floor: that is, background noise. The "noise floor" of headphones usually refers to the background noise that can be heard in the headphones when no audio signal is played.

[0039] Flexible Printed Circuit (FPC): used to connect electronic devices or components. The flexible circuit board includes a flexible substrate covered with conductive lines for transmitting electrical signals or power. The conductive lines are made using printing technology and have good flexibility and bendability, which can adapt to electronic devices of different shapes and sizes. The flexible circuit board can achieve efficient signal transmission and power transmission, while having a small size and weight, and is suitable for connection applications in various electronic devices.

[0040] Polyimide (PI) is a high-performance polymer material with excellent heat resistance, mechanical strength, chemical stability and electrical insulation properties.

[0041] Flexible Printed Circuit (FPC) refers to a conductive circuit board used to connect electronic devices or components. Soft-pack batteries are widely used in some wireless headphones or portable headphones. However, the magnetic field generated by the soft-pack battery when working may interfere with the electronic components and magnetic components in the headphones, thereby affecting the sound quality and performance of the headphones. In order to solve this problem, steel-shell disc batteries are used in related technologies to reduce magnetic field interference and eliminate background noise. However, steel-shell disc batteries are expensive and large in size, which may take up more headphone space.

[0042] Therefore, how to reduce the background noise generated by the magnetic field of the soft-pack battery and thus improve the playback quality of headphones has become a technical problem that needs to be solved urgently.

[0043] Please refer to Figure 1 , Figure 2A , Figure 3 and Figure 4 The embodiment of the utility model provides a soft-pack battery for earphones, the soft-pack battery includes a battery cell 110, a flexible circuit board 120 and a battery shell 130. The soft-pack battery includes a battery cell 110, the battery cell 110 is arranged inside the battery shell 130, and the battery cell 110 includes a positive electrode sheet 111 and a negative electrode sheet 112. The flexible circuit board 120 includes a demagnetization part 121, a first connection part 122 and a second connection part 123, and the demagnetization part 121 is connected between the first connection part 122 and the second connection part 123; wherein the first connection part 122 is electrically connected to the negative electrode sheet 112. The battery shell 130 includes a first power supply terminal 131, a second power supply terminal 132 and a welding part 133, the positive electrode sheet 111 is electrically connected to the first power supply terminal 131, the second connection part 123 is connected to the second power supply terminal 132, and the welding part 133 is connected to the spiral negative electrode sheet 112. wherein the first power supply terminal 131 and the second power supply terminal 132 are used to power the earphones.

[0044] The embodiment of the utility model integrates the battery housing, the battery cell and the flexible circuit board into a soft-pack battery, which helps to reduce the number and complexity of components inside the earphone, thereby saving earphone space. In addition, using a battery cell is generally safer than using a stacked battery cell because the winding structure can better withstand internal pressure and reduce the risk of short circuit and thermal runaway. The use of a battery housing can protect the internal battery cell from physical damage, which can improve the durability of the soft-pack battery, thereby improving the service life of the soft-pack battery. The use of a flexible circuit board means that the soft-pack battery can be designed to adapt to the complex shape inside the earphone, which helps to improve the compatibility of the soft-pack battery with the internal structure of the earphone. The first connecting portion of the flexible circuit board is electrically connected to the negative electrode sheet, and the second connecting portion of the flexible circuit board is connected to the second power supply end (i.e., the negative electrode) of the battery housing. The demagnetization portion of the flexible circuit board is connected between the first connecting portion and the second connecting portion. The demagnetization portion is used to connect the negative electrode of the soft-pack battery with the negative electrode sheet of the battery cell, and can generate a current and a magnetic field in the opposite direction of the magnetic field of the battery cell to offset the magnetic field interference of the battery cell, effectively reducing the background noise generated by the magnetic field interference of the soft-pack battery to the earphone, thereby improving the playback quality of the earphone.

[0045] It should be noted that the welding portion 133 is connected to the spiral negative electrode sheet 112, and the first connecting portion 122 is electrically connected to the negative electrode sheet 112, so the welding portion 133 is connected to the first connecting portion 122. The setting of the welding portion 133 realizes the electrical connection between the first connecting portion 122 and the negative electrode sheet 112. The welding portion leads the negative electrode sheet to the battery casing. The welding portion 133 can be called a negative electrode welding point, which helps to connect the negative electrode sheet to the flexible circuit board, thereby achieving demagnetization.

[0046] It should be noted that the positive electrode sheet 111 is electrically connected to the first power supply terminal 131, and the first power supply terminal 131 is the positive electrode, and the second power supply terminal 132 is the negative electrode. The first connecting portion 122 of the flexible circuit board 120 is connected to the welding portion 133, and the connection method can be a spot welding connection. The flexible circuit board 120 is arranged below the battery housing 130, and the embodiment of the utility model uses the flexible circuit board 120 to connect the negative electrode of the soft-pack battery (that is, the second power supply terminal 132) through the bottom of the soft-pack battery to the negative electrode welding point of the soft-pack battery (that is, the welding portion 133).

[0047] Please refer to Figure 2A and Figure 2B The embodiment of the utility model provides a flexible circuit board 120 , which includes a demagnetizing portion 121 , a first connecting portion 122 , and a second connecting portion 123 . The demagnetizing portion 121 is located between the first connecting portion 122 and the second connecting portion 123 .

[0048] It should be noted that the first connection part 122 and the second connection part 123 only play a connecting role and do not generate a magnetic field. The demagnetization part 121 only generates a magnetic field in the opposite direction of the battery cell at its location, the purpose of which is to offset the magnetic field interference of the battery cell and effectively reduce the background noise generated by the magnetic field interference of the soft-pack battery on the earphone, thereby improving the playback quality of the earphone.

[0049] For example, please refer to Figure 2A and Figure 4 , Figure 2A A schematic diagram of a surface of a flexible circuit board 120 provided in an embodiment of the utility model. The demagnetization portion 121 of the flexible circuit board 120 is in a fan-shaped ring shape, and the fan-shaped demagnetization portion 121 is coaxially arranged with the negative electrode sheet 112. The fan-shaped demagnetization portion can reduce the electromagnetic interference generated by the soft-pack battery during the charging and discharging process, thereby protecting the electronic components inside the earphone. The demagnetization portion is coaxial with the negative electrode sheet and is arranged in a fan-shaped ring shape, so that the demagnetization portion and the negative electrode sheet are strictly parallel, which can better offset the magnetic field generated by the negative electrode sheet.

[0050] It should be noted that the curvature of the demagnetization portion 121 is the same as the winding curvature of the battery cell 110. In other words, the demagnetization portion is strictly parallel to the internal winding of the battery cell, which can effectively offset the magnetic field generated inside the soft-pack battery and reduce the impact of the magnetic field on the performance of the soft-pack battery.

[0051] Please refer to Figure 2B , Figure 2B for Figure 2A In some embodiments, the flexible circuit board 120 may be a four-layer structure, wherein the first layer is polyimide, the second layer is copper, the third layer is copper, and the fourth layer is polyimide.

[0052] It should be noted that copper foil is a conductive material in flexible circuit boards. The four-layer flexible circuit board composed of polyimide and copper foil has good insulation and can enhance mechanical stability, improve heat resistance, electrical reliability, etc.

[0053] In a specific embodiment, the flexible circuit board can be a three-layer structure, wherein the first layer is polyimide, the second layer is copper, and the third layer is polyimide. Compared with the three-layer flexible circuit board, the four-layer flexible circuit board has two layers of copper, which can disperse heat more effectively and help improve the heat resistance of the flexible circuit board.

[0054] When the flexible circuit board 120 of this embodiment is used, the first connection part 122 is connected to the welding part 133, and the second connection part 123 is connected to the second power supply terminal 132. After power is turned on, the current flows from the second power supply terminal 132 to the second connection part 123, and then flows from the second connection part 123 to the first connection part 122 through the demagnetization part 121, and the first connection part 122 flows to the negative electrode 112. At this time, the flexible circuit board 120 will generate a magnetic field. When the magnetic field generated by the flexible circuit board 120 of the present technical solution overlaps and is opposite to the magnetic field of the battery cell 110, the magnetic field will be offset, thereby solving the technical problem that the magnetic field of the soft-pack battery 100 affects the magnetic field of the earphone to generate background noise.

[0055] Please refer to Figure 3 , Figure 3 This is a top view of a soft-pack battery of an embodiment of the utility model. Specifically, the battery housing 130 is a first shape, and the negative electrode sheet 112 is a second shape that matches the first shape. The second shape of the negative electrode sheet matches the first shape of the battery housing, which can ensure that the space inside the soft-pack battery is used most efficiently and reduce the internal voids, thereby making the soft-pack battery capacity larger. In addition, the second shape of the negative electrode sheet matches the first shape of the battery housing, which can also improve the structural stability of the soft-pack battery, reduce the mechanical stress caused by shape mismatch, and thus reduce the risk of deformation or damage of the soft-pack battery during use.

[0056] It is understandable that when the ratio of the volume occupied by the negative electrode sheet of the second shape to the volume corresponding to the battery housing of the first shape exceeds a fixed threshold, the second shape matches the first shape. The fixed threshold can be set according to actual conditions, for example, it can be 75%, or it can be 80%, and there is no specific limitation. The second shape matches the first shape to ensure that the space inside the soft-pack battery is used most efficiently, which helps to save space inside the earphone.

[0057] Please refer to Figure 4 , Figure 4 This is another top view of the soft-pack battery of the embodiment of the utility model, which is also a schematic diagram. Specifically, the battery housing 130 can be cylindrical, and the negative electrode sheet 112 can be wound into a spiral coaxial with the cylindrical battery housing 130. Among them, the spiral winding can make more full use of the internal space of the battery housing, thereby increasing the effective volume of the soft-pack battery under the same housing size, improving the energy density, and also improving the uniformity of current distribution, which helps to distribute the current more evenly on the negative electrode sheet, reduce overheating or damage caused by excessive local current, and improve the safety and reliability of the soft-pack battery.

[0058] It should be noted that the positive electrode sheet 111 can be wound into a spiral shape coaxial with the negative electrode sheet 112. The spiral winding of the positive electrode sheet can more effectively utilize the internal space of the soft-pack battery, thereby improving the energy density of the soft-pack battery. The coaxial spiral winding of the positive electrode sheet and the negative electrode sheet helps to achieve uniform distribution of current.

[0059] In some embodiments, the negative electrode sheet 112 of the soft-pack battery is longer than the positive electrode sheet 111 . Figure 4 The red spiral is the positive electrode, and the blue spiral is the negative electrode. The winding direction of the negative electrode and the positive electrode is clockwise.

[0060] It should be noted that the battery cell 110 further includes a diaphragm (not shown in the figure), which is located between the positive electrode sheet 111 and the negative electrode sheet 112, and is used to separate the positive electrode sheet 111 from the negative electrode sheet 112. The main function of the diaphragm is to physically separate the positive electrode sheet from the negative electrode sheet, prevent the positive electrode sheet and the negative electrode sheet from directly contacting each other to cause a short circuit, and thus improve the safety of the soft-pack battery.

[0061] When the soft-pack battery 100 is in use (discharging), the current direction in the negative electrode sheet 112 on the battery cell 110 is counterclockwise, and the current direction in the positive electrode sheet 111 on the battery cell 110 is clockwise. According to Ampere's law, the magnetic field generated by the soft-pack battery is perpendicular to the cross-section of the soft-pack battery winding, that is, the direction of the magnetic field can include perpendicular to the paper surface outward and perpendicular to the paper surface inward. Then the direction of the magnetic field generated by the negative electrode sheet 112 on the battery cell 110 is perpendicular to the paper surface outward, and the direction of the magnetic field generated by the positive electrode sheet 111 on the battery cell 110 is perpendicular to the paper surface inward.

[0062] It should be noted that perpendicular to the paper surface is inward: when the paper is upright, the direction parallel to the line of sight is perpendicular to the paper surface inward, which is represented by × in physics. Perpendicular to the paper surface outward: when the paper is upright, the direction parallel to the line of sight is perpendicular to the paper surface outward, which is represented by · in physics.

[0063] However, since the length of the negative electrode sheet 112 in the soft-pack battery is greater than that of the positive electrode sheet 111, the magnetic field generated by the positive electrode sheet of the battery cell 110 cannot completely offset the magnetic field generated by the negative electrode sheet, which will interfere with the magnetic field of the internal components of the earphone, thereby causing the earphone to produce background noise. Therefore, the demagnetization part 121 of the flexible circuit board 120 is correspondingly designed to be attached to the bottom of the battery cell 110, specifically, it is arranged below the outermost circle of the spiral negative electrode sheet 112.

[0064] When the soft pack battery 100 is in use (discharging), the direction of the current inside the flexible circuit board 120 is: from the second power supply end 132 to the second connection part 123, then from the second connection part 123 to the first connection part 122 through the demagnetization part 121, the first connection part 122 to the welding part 133, and the welding part 133 to the negative electrode sheet 112. The direction of the current inside the demagnetization part 121 is clockwise, and the direction of the magnetic field generated is perpendicular to the paper surface and inward, that is, the direction of the current in the demagnetization part 121 is opposite to the current direction of the negative electrode sheet, and the direction of the magnetic field generated is also opposite to the magnetic field direction of the negative electrode sheet, so it can offset the magnetic field generated by the negative electrode sheet 112 above the demagnetization part 121.

[0065] A flexible circuit board is used to connect the negative electrode of the soft-pack battery (i.e., the second power supply terminal 132) and the negative electrode welding point of the soft-pack battery (i.e., the welding portion 133) through the bottom of the soft-pack battery, thereby generating a reverse current and magnetic field to offset the magnetic field interference generated by the negative electrode sheet of the battery cell 110, thereby effectively reducing the background noise generated by the magnetic field interference of the soft-pack battery to the earphone.

[0066] It should be noted that when the winding direction of the negative electrode sheet and the positive electrode sheet is Figure 4 When the winding directions are opposite (i.e., when the negative electrode sheet and the positive electrode sheet are both wound counterclockwise), the direction of the magnetic field generated by the battery cell 110 is also opposite to the direction of the magnetic field of the flexible circuit board 120. This technical solution connects the flexible circuit board 120 via the battery cell 110, and the current direction of the negative electrode sheet 112 of the battery cell 110 is coaxially opposite to the current direction of the flexible circuit board 120, so that the magnetic field generated by the current on the negative electrode sheet 112 of the battery cell 110 and the magnetic field generated on the flexible circuit board 120 offset and demagnetize each other, thereby preventing the magnetic field of the battery cell 110 from affecting the magnetic field of the earphone, causing the earphone to generate noise, hum, etc. The embodiment of the utility model can solve the technical problem in the prior art that the magnetic field of the soft-pack battery affects the magnetic field of the earphone, causing earphone noise.

[0067] It should be noted that, taking lithium-ion soft-pack batteries as an example, the reason why the length of the negative electrode sheet is usually longer than that of the positive electrode sheet is that during the charging and discharging process of lithium-ion batteries, the lithium ions in the material of the positive electrode sheet will detach and embed into the material of the negative electrode sheet. If there are too many positive electrode sheets, then during the discharge process, the lithium ions released from the positive electrode sheet need to find the corresponding position in the negative electrode sheet for embedding. Especially in the case of high current discharge, if the embedding vacancies of the negative electrode sheet just meet the demand, the lithium ions may not be embedded in time, resulting in lithium precipitation on the surface of the negative electrode sheet, which may cause safety problems. In order to ensure the safe operation of the soft-pack battery, the negative electrode sheet is usually designed to be excessive relative to the positive electrode sheet, which helps to avoid the precipitation of lithium ions on the surface of the negative electrode sheet and the formation of branched crystals, thereby improving the safety of the soft-pack battery.

[0068] It should be noted that the arc length of the degaussing portion 121 is the first length, and the first length is equal to the difference between the lengths of the negative electrode sheet 112 and the positive electrode sheet 111. The degaussing portion 121 is arranged at the bottom of the outermost circle of the negative electrode sheet, and the length of the portion of the negative electrode sheet corresponding to the degaussing portion 121 is also the first length, which can offset the magnetic field interference of the portion of the negative electrode sheet in the battery cell where the negative electrode sheet is longer than the positive electrode sheet, effectively reduce the background noise generated by the magnetic field interference of the soft-pack battery to the earphone, thereby improving the playback quality of the earphone.

[0069] Typically, the demagnetizing portion 121 is in a sector ring shape and the arc length satisfies that it is greater than 1 / 4 of the circumference of the soft-pack battery and less than 1 / 2 of the circumference of the soft-pack battery. Exemplarily, the radius of the soft-pack battery can be 7 millimeters (mm). The width of the sector ring demagnetizing portion 121 can be 1.5±0.1 mm.

[0070] Please refer to Figure 5 , Figure 6 and Figure 7 , Figure 5 This is a right side view of a soft pack battery according to an embodiment of the utility model. Figure 6 This is a bottom view of a soft-pack battery according to an embodiment of the utility model. Figure 7 It is a schematic diagram of a decomposed soft-pack battery of an embodiment of the utility model. In the embodiment of the utility model, the flexible circuit board 120 is led out from the outside of the battery housing 130, and the flexible circuit board 120 is welded in parallel with the negative electrode sheet inside the battery cell 110. Specifically, the first connecting portion 122 is connected to the negative electrode sheet 112, passes through the demagnetization portion 121, and then is connected to the second power supply terminal 132 (i.e., the negative electrode of the soft-pack battery) by the second connecting portion 123. Therefore, the path of the flexible circuit board 120 is set to be counterclockwise, which is opposite to the winding direction of the negative electrode sheet 112. After the soft-pack battery 100 is powered, the current drawn out through the negative electrode sheet 112 generates a magnetic field in the flexible circuit board 120. The magnetic field of the flexible circuit board 120 is opposite to the magnetic field generated by the negative electrode sheet 112 inside the battery cell 110, forming a hedge and cancellation.

[0071] In addition, an embodiment of the utility model further discloses an earphone, which includes: a soft-pack battery; the soft-pack battery is such as the soft-pack battery mentioned above.

[0072] It should be noted that the specific structure of the soft-pack battery is the same as the soft-pack battery described above, and will not be repeated here.

[0073] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A soft pack battery, characterized in that: The soft-pack battery is applied to earphones, and the soft-pack battery comprises a battery housing, a battery cell and a flexible circuit board; The battery cell is arranged inside the battery housing, and the battery cell comprises a positive electrode sheet and a negative electrode sheet; The flexible circuit board comprises a demagnetizing portion, a first connecting portion and a second connecting portion, wherein the demagnetizing portion is connected between the first connecting portion and the second connecting portion; wherein the first connecting portion is electrically connected to the negative electrode sheet; The battery housing includes a first power supply end and a second power supply end, the positive electrode sheet is electrically connected to the first power supply end, and the second connecting portion is connected to the second power supply end; wherein the first power supply end and the second power supply end are used to power the earphone.

2. The soft pack battery according to claim 1, characterized in that: The battery housing is in a first shape, and the negative electrode sheet is in a second shape that matches the first shape.

3. The soft pack battery according to claim 2, characterized in that: The battery casing is cylindrical, and the negative electrode sheet is wound into a spiral shape coaxial with the cylindrical battery casing.

4. The soft pack battery according to claim 3, characterized in that: The demagnetization portion of the flexible circuit board is in the shape of a sector ring, and the sector ring-shaped demagnetization portion is coaxially arranged with the negative electrode sheet.

5. The soft pack battery according to claim 3 or 4, characterized in that: The battery case further includes a welding portion connected to the spiral negative electrode sheet.

6. The soft pack battery according to claim 3, characterized in that: The curvature of the demagnetizing portion is the same as the winding curvature of the battery core.

7. The soft pack battery according to claim 6, characterized in that: The positive electrode sheet is wound into a spiral shape coaxial with the negative electrode sheet.

8. The soft pack battery according to claim 7, characterized in that: The arc length of the demagnetization portion is a first length, and the first length is equal to the difference between the lengths of the negative electrode sheet and the positive electrode sheet.

9. The soft pack battery according to claim 1, characterized in that: The battery cell further includes a diaphragm, which is located between the positive electrode sheet and the negative electrode sheet, and is used to separate the positive electrode sheet from the negative electrode sheet.

10. A headset, characterized in that: include: A soft-pack battery, wherein the soft-pack battery is the soft-pack battery according to any one of claims 1 to 9.

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