Magnetic leakage prevention wireless charging receiving module and intelligent terminal

Abstract

The utility model relates to the technical field of wireless charging, and discloses a magnetic leakage prevention wireless charging receiving module, which comprises a first soft magnet, a receiving coil, a flexible circuit board and a radiating fin, and is characterized in that the first soft magnet is provided with a first through hole; the receiving coil is arranged below the first soft magnet; an inner wire circuit of the flexible circuit board is positioned above the first soft magnet and is welded with the first connecting end after passing through the first through hole, and an outer wire circuit is positioned below the first soft magnet and is welded with the second connecting end; the inner wire circuit comprises a plurality of sub-circuits which are arranged in parallel; and the cooling fin is fixed on the first soft magnet and is used for cooling the receiving coil. The utility model further discloses an intelligent terminal which comprises a shell, a battery and the wireless charging receiving module capable of preventing magnetic flux leakage. According to the utility model, the eddy current formed on the inner lead line by the magnetic field of the receiving coil is reduced, the heating value of the wireless charging receiving module is reduced, the temperature rise of the intelligent terminal is reduced, and the charging efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, and in particular to a wireless charging receiver module and smart terminal that prevents magnetic leakage. Background Technology

[0002] The main components of a wireless charging receiver module include a receiving coil, a soft magnet, and a circuit board. The wireless charging receiver module is built into the smart device being charged, such as a mobile phone, tablet, or smartwatch. When the smart device is brought close to the charging base, the transmitting coil in the charging base, powered by alternating current of a certain frequency, induces a current in the receiving coil of the smart device through electromagnetic induction. This transmits energy from the transmitting end to the receiving end, enabling the charging base to charge the smart device. Because current is generated at the receiving end, the smart device being charged will generate heat, causing a temperature rise problem. In severe cases, this can lead to the smart device overheating, malfunctioning, or even exploding.

[0003] To minimize the temperature rise of the smart device being charged, the main charging method for smartphones, tablets, and other smart devices in the current technology is to limit the charging current of the circuit. Limiting the current leads to low charging efficiency for the smart device, giving users the impression that although the product is no longer hot, the charging is significantly slower, thus reducing user satisfaction.

[0004] Given the prevalence of the aforementioned problems in current smart terminals on the market, there is an urgent need for a wireless charging receiver module and smart terminal that prevents magnetic leakage in order to solve these technical issues. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a wireless charging receiver module and smart terminal that prevents magnetic leakage, which can reduce the temperature rise of the smart terminal during the wireless charging process and improve the charging efficiency of the smart terminal.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A wireless charging receiver module with anti-magnetic leakage protection includes:

[0008] A first soft magnet, wherein a first through hole is formed on the upper and lower surfaces of the first soft magnet;

[0009] A receiving coil is disposed below the first soft magnet, and the receiving coil includes a first connecting end wound on the inner side and a second connecting end wound on the outer side;

[0010] A flexible circuit board includes inner conductor lines and outer conductor lines. The inner conductor lines are located above the first soft magnet, pass through the first through hole, and are soldered to the first connecting end. The outer conductor lines are located below the first soft magnet and are soldered to the second connecting end. The inner conductor lines include multiple sub-lines arranged in parallel.

[0011] A heat sink is fixed to the first soft magnet and is used to dissipate heat from the receiving coil.

[0012] In some possible implementations, the wireless charging receiver module further includes a second soft magnet disposed above the first soft magnet and covering the connection point between the inner conductor and the first connection end.

[0013] In some possible implementations, the coverage area of ​​the first soft magnet is larger than the coverage area of ​​the receiving coil, and the coverage area of ​​the second soft magnet is smaller than the coverage area of ​​the receiving coil.

[0014] In some possible implementations, the second soft magnet is circular in shape.

[0015] In some possible implementations, the wireless charging receiver module further includes a reinforcing component fixed to the first soft magnet or the receiving coil.

[0016] In some possible implementations, the inner conductor is a flat conductor, and the portion of the flat conductor above the first soft magnet is divided into multiple parallel and spaced sub-circuits.

[0017] In some possible implementations, the receiving coil is fixed to the first soft magnet, the first soft magnet is fixed to the flexible circuit board, and the second soft magnet is fixed to the first soft magnet by adhesive bonding.

[0018] In some possible implementations, the heat sink is a graphite heat sink or a silicone heat sink.

[0019] In some possible implementations, the flexible circuit board is a single-sided or double-sided FPC circuit board.

[0020] A smart terminal includes a housing, a battery, and a wireless charging receiver module with anti-magnetic leakage as described in any of the above solutions. The battery and the wireless charging receiver module are both installed inside the housing, and the wireless charging receiver module is used to charge the battery.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a wireless charging receiver module with anti-magnetic leakage capability. The inner and outer wires of a flexible circuit board are respectively placed on the upper and lower sides of a first soft magnet. The inner wire is located above the first soft magnet, and the outer wire is located below it. The inner wire passes through a first through-hole and connects to a first connecting end coiled inside the receiving coil below the first soft magnet. The outer wire connects to a second connecting end coiled outside the receiving coil. Since eddy currents are easily generated in the inner wires of a flexible circuit board, this invention uses the first soft magnet to separate the inner wires from the receiving coil, thereby reducing the eddy currents formed by the magnetic field of the receiving coil on the inner wires. Furthermore, this invention subdivides the inner wires into multiple sub-wires, further reducing eddy currents in the inner wires. This effectively reduces the heat generation of the wireless charging receiver module, lowers the temperature rise of the smart terminal during charging, and improves the user experience and charging safety of the smart terminal. In addition, this invention also includes a heat sink to effectively dissipate heat from the receiving coil, further reducing the temperature rise of the smart terminal. This invention can continuously keep the wireless charging receiver module in a stable high-current, full-load working state, effectively improving the efficiency of wireless charging and accelerating the charging speed of smart terminals. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the front structure of a wireless charging receiver module in the prior art;

[0024] Figure 2 This is a schematic diagram of the rear structure of a wireless charging receiver module in the prior art;

[0025] Figure 3 This is a simulation diagram of the temperature rise of a wireless charging receiver module during charging in existing technology;

[0026] Figure 4 This is a front structural diagram of the anti-magnetic leakage wireless charging receiver module provided in this embodiment of the utility model;

[0027] Figure 5 This is a front structural diagram of the anti-magnetic leakage wireless charging receiver module (second soft magnet not shown) provided in this embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of the back structure of the anti-magnetic leakage wireless charging receiver module (connectors not shown) provided in this embodiment of the utility model;

[0029] Figure 7 This is an exploded view of the anti-magnetic leakage wireless charging receiver module provided in this embodiment of the utility model;

[0030] Figure 8This is a schematic diagram of the structure of the receiving coil and flexible circuit board provided in this embodiment of the utility model;

[0031] Figure 9 This is a schematic diagram of the internal conductor circuit of the flexible circuit board provided in this embodiment of the utility model;

[0032] Figure 10 This is a simulation diagram of the temperature rise during charging of the anti-magnetic leakage wireless charging receiver module provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 1' Soft magnet; 2' Receiving coil; 3' Flexible circuit board;

[0035] 1. First soft magnet; 11. First through hole; 12. Second through hole;

[0036] 2. Receiving coil; 21. First connection terminal; 22. Second connection terminal;

[0037] 3. Flexible circuit board; 31. Inner conductor circuit; 311. Sub-circuit; 32. Outer conductor circuit;

[0038] 4. Second soft magnet;

[0039] 5. Connectors. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this utility model, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0044] like Figures 1-3 As shown, existing wireless charging receiver modules include a soft magnet 1', a receiving coil 2', and a flexible circuit board 3'. The lines of both the receiving coil 2' and the flexible circuit board 3' are located on the same side of the soft magnet 1'. This structure easily generates eddy currents in the flexible circuit board 3', leading to high heat generation in the wireless charging receiver module and excessive temperature rise in the smart terminal. While limiting the charging current can reduce overheating, it can also result in lower charging efficiency for the smart terminal.

[0045] To address the aforementioned issues, this embodiment provides a wireless charging receiver module that prevents magnetic leakage. As the receiver of a wireless charging system, it can be applied to smart terminals such as mobile phones, tablets, laptops, smartwatches, and smart glasses, thereby solving the problems of excessive temperature rise and slow charging speed of smart terminals during wireless charging in the prior art.

[0046] like Figures 4 to 10As shown, the anti-magnetic leakage wireless charging receiver module provided in this embodiment includes a first soft magnet 1, a receiving coil 2, a flexible circuit board 3, and a heat sink. The first soft magnet 1 has an electromagnetic shielding function, and a first through hole 11 is formed on the first soft magnet 1, penetrating its upper and lower surfaces. Preferably, the first through hole 11 is located in the middle region of the first soft magnet 1. The receiving coil 2 is located below the first soft magnet 1. The receiving coil 2 is specifically a wound coil containing metal material, which is wound in a ring shape, including a first connecting end 21 wound on the inner side and a second connecting end 22 wound on the outer side. The first connecting end 21 is located below the first through hole 11, and the second connecting end 22 is located near the edge of the first soft magnet 1. The flexible circuit board 3 includes inner conductor lines 31 and outer conductor lines 32. The inner conductor lines 31 are located above the first soft magnet 1, pass through the first through hole 11, and are soldered to the first connecting end 21. The outer conductor lines 32 are located below the first soft magnet 1 and are soldered to the second connecting end 22. This allows the receiving coil 2 and the flexible circuit board 3 to form a closed circuit for charging smart terminals such as mobile phones and tablets. In this embodiment, the flexible circuit board 3 is a single-sided or double-sided FPC circuit board. The inner conductor lines 31 of the flexible circuit board 3 include multiple parallel sub-lines 311. A heat sink is fixed to the first soft magnet 1 to dissipate heat from the receiving coil 2.

[0047] The wireless charging receiver module with anti-magnetic leakage provided in this embodiment places the inner conductor 31 and outer conductor 32 of the flexible circuit board 3 on the upper and lower sides of the first soft magnet 1, respectively. The inner conductor 31 is located above the first soft magnet 1, and the outer conductor 32 is located below the first soft magnet 1. The inner conductor 31 passes through the first through hole 11 and connects to the first connection end 21, which is coiled inside the receiving coil 2 below the first soft magnet 1. The outer conductor 32 connects to the second connection end 22, which is coiled outside the receiving coil 2. Since eddy currents are easily generated in the inner conductor 31 in the flexible circuit board 3, this embodiment uses the first soft magnet 1 to separate the inner conductor 31 from the receiving coil 2, thereby reducing the eddy currents formed by the magnetic field of the receiving coil 2 on the inner conductor 31. This effectively reduces the heat generation of the wireless charging receiver module, reduces the temperature rise of the smart terminal, and improves the user experience and charging safety of the smart terminal. Furthermore, this embodiment can continuously maintain the wireless charging receiver module in a high-current, full-load operating state, effectively improving the efficiency of wireless charging and accelerating the charging speed of the smart terminal. In addition, this embodiment further reduces the temperature rise of the smart terminal by providing a heat sink on the first soft magnet 1. Specifically, the heat sink can be a graphite heat sink or a silicone heat sink, and the heat sink is bonded to the first soft magnet 1 to improve the heat dissipation capacity of the smart terminal.

[0048] In this embodiment, since the area with the strongest magnetic field (i.e., the area most prone to eddy current formation) in the flexible circuit board 3 is the inner conductor line 31, this embodiment subdivides the inner conductor line 31 into multiple sub-lines 311, which can further reduce eddy currents in the circuit. Specifically, the inner conductor line 31 in this embodiment can be Litz wire or self-adhesive enameled wire. It should be noted that the above-mentioned Litz wire refers to a conductor made of multiple independently insulated conductors twisted or braided; the above-mentioned self-adhesive enameled wire refers to a conductor in which the coils are bonded together under appropriate solvent or heating conditions. Exemplarily, the inner conductor line 31 in this embodiment is a flat conductor with a certain width. The flat conductor is divided into multiple parallel and spaced sub-lines 311 in the area directly above the first soft magnet 1. Its structure is simple, easy to process, and has stable performance.

[0049] Optionally, a portion of the outer conductor line 32 is disposed directly below the first soft magnet 1 for connection to the second connection terminal 22 of the receiving coil 2, thereby preventing the second connection terminal 22 from protruding beyond the first soft magnet 1; another portion of the outer conductor line 32 protrudes laterally from the first soft magnet 1 for connection to the inner conductor line 31. Optionally, the portion of the outer conductor line 32 located directly below the first soft magnet 1 is in contact with the lower surface of the first soft magnet 1 to ensure the stability of the connection between the outer conductor line 32 and the first soft magnet 1.

[0050] Furthermore, a portion of the inner conductor line 31 is disposed directly above the first soft magnet 1 for connection to the first connection terminal 21 of the receiving coil 2; another portion of the inner conductor line 31 is laterally exposed above the first soft magnet 1, and the end of the inner conductor line 31 laterally exposed above the first soft magnet 1 is interconnected with the end of the outer conductor line 32 laterally exposed above the first soft magnet 1. Optionally, the portion of the inner conductor line 31 located directly above the first soft magnet 1 is in contact with the upper surface of the first soft magnet 1 to ensure the connection stability between the inner conductor line 31 and the first soft magnet 1.

[0051] Optionally, the wireless charging receiver module of this embodiment further includes a second soft magnet 4, which is disposed above the first soft magnet 1 and covers the connection position between the inner conductor line 31 and the first connection terminal 21. By disposing of the second soft magnet 4 above the inner conductor line 31, this embodiment can shield the leakage magnetic field of the receiving coil 2 at the first through hole 11, further improving the electromagnetic shielding effect and enhancing the performance of the wireless charging receiver module.

[0052] In this embodiment, the coverage area of ​​the first soft magnet 1 is larger than that of the receiving coil 2, allowing the receiving coil 2 to be completely mounted on the first soft magnet 1, effectively providing electromagnetic shielding for the receiving coil 2. Furthermore, the coverage area of ​​the second soft magnet 4 is smaller than that of the receiving coil 2 but larger than the area of ​​the first through hole 11. In this embodiment, the size of the second soft magnet 4 only needs to be sufficient to cover the connection between the internal conductor 31 and the first connecting end 21, without needing to be excessively large to avoid material waste. Optionally, in this embodiment, the receiving coil 2 is annular, the first soft magnet 1 is a rectangular (i.e., one end of the rectangle is rounded) soft magnetic sheet, and the second soft magnet 4 is a circular soft magnetic sheet. Of course, in other embodiments, the shapes of the receiving coil 2, the first soft magnet 1, and the second soft magnet 4 can also be other shapes, and are not limited to this embodiment.

[0053] In this embodiment, the materials of the first soft magnet 1 and the second soft magnet 4 can be ferrite materials, ferrite amorphous materials, ferrite amorphous nanomaterials, or ferrite composite materials, etc. Preferably, the first soft magnet 1 and the second soft magnet 4 in this embodiment are both made of nanocrystalline materials or ferrite. Nanocrystalline materials have high saturation magnetic induction, high permeability, and low magnetic loss, while also being flexible and ultra-thin. Ferrite is prepared and sintered from ferric oxide and one or more other metal oxides (e.g., nickel oxide, zinc oxide, manganese oxide, magnesium oxide, barium oxide, strontium oxide, etc.), and can be mass-produced, has stable performance, and high machinability.

[0054] Optionally, the wireless charging receiver module in this embodiment further includes a connector 5. The connector 5 is disposed on the side of the receiving coil 2 away from the first soft magnet 1 and is used to fix it to the housing of the smart terminal. By providing a connector 5 on one side of the receiving coil 2, this embodiment allows the wireless charging receiver module to be better assembled with mobile phones, tablets, and other devices. Specifically, the connector 5 is a colloid or Mylar. Further, the connector 5 is sheet-shaped, and its shape is the same as that of the first soft magnet 1 to achieve a better connection effect. In this embodiment, when the connector 5 is a colloid, the colloid can be a hot melt adhesive or a pressure-sensitive adhesive, and it can be a double-sided adhesive or a single-sided adhesive; when the connector 5 is Mylar, a second through hole 12 can be opened on the first soft magnet 1, penetrating its upper and lower surfaces, and a connection hole can also be provided on the Mylar, thereby achieving the fastening of the wireless charging receiver module to the housing of the smart terminal by fastening screws.

[0055] Optionally, the receiving coil 2 is fixed to the first soft magnet 1, the first soft magnet 1 is fixed to the flexible circuit board 3, and the second soft magnet 4 is fixed to the first soft magnet 1 by adhesive bonding. For example, it can be bonded by single-sided adhesive or double-sided adhesive. The above connection method is convenient to operate and flexible to assemble.

[0056] Optionally, the wireless charging receiver module in this embodiment further includes a rigid protective film component. The rigid protective film component is disposed on the outside of the first soft magnet 1 to increase the rigidity of the wireless charging receiver module and improve its structural strength. Further, the wireless charging receiver module also includes a reinforcing component, which is fixed to the first soft magnet 1 or the receiving coil 2. Specifically, the reinforcing component can be a reinforcing plate, and the material of the reinforcing plate can be plastic or metal. By setting the reinforcing component, the wireless charging receiver module can have higher strength, is less prone to deformation, and better match the smart terminal.

[0057] Figure 3 Simulation diagram of temperature rise during charging of existing wireless charging receiver modules. Figure 10 A simulation diagram of the temperature rise during charging of the anti-magnetic leakage wireless charging receiver module provided in this embodiment. Figure 3 and Figure 10 The comparison shows that, compared with traditional wireless charging receiver modules, the wireless charging receiver module with anti-magnetic leakage provided in this embodiment reduces the eddy currents formed by the magnetic field of the receiving coil 2 on the inner conductor line 31 because the inner conductor line 31 is on the upper side of the first soft magnet 1. Therefore, it generates less heat, has a more uniform temperature, and does not have concentrated hot spots, resulting in a significant temperature improvement effect.

[0058] Furthermore, as shown in the table below, a comparison of temperature rise data of the prior art and the wireless charging receiver provided in this improved embodiment is presented.

[0059] state Inductance (L) 100kHz = Resistance (R) Q-Factor phase Current (A) B (Tesla) Max: Efficiency_% Max: Temperature rise Before improvement 8.2uH 281mohm 18.38 0 2 0.0395 81％ 58° After improvement 8.2uH 281mohm 18.38 0 2 0.0056 83％ 51°

[0060] This comparative experiment was conducted at a frequency of 100kHz, with the same inductance L, resistance R, and Q values. Inductance L represents the receiving coil's ability to store magnetic field energy; its value indicates the coil's size or the number of coils. Resistance R represents the internal resistance of the coil's conductors. Q is the quality factor, representing the coil's performance at its operating frequency; specifically, Q is the ratio of the coil's self-inductance L to its resistance R, i.e., Q = ωL / R, where ω is the angular frequency (2π multiplied by the frequency). The table clearly shows that, under the same conditions, the improved solution in this embodiment effectively reduces the magnetic flux density B (Tesla) in the internal conductors during wireless charging, lowers temperature rise, improves charging efficiency, and simultaneously ensures device safety and lifespan compared to existing solutions.

[0061] This embodiment also provides a smart terminal, including a housing, a battery, and the aforementioned anti-magnetic leakage wireless charging receiver module. Both the battery and the wireless charging receiver module are installed inside the housing, and the wireless charging receiver module is used to charge the battery. When the smart terminal provided in this embodiment is near a charging base, its charging process is as follows: An alternating current is passed through the transmitting coil inside the charging base to generate a continuously changing magnetic field. The receiving coil 2 senses the changing magnetic field generated by the transmitting coil and generates an induced current. After further processing, the induced current charges the battery. This embodiment reduces the eddy currents formed by the magnetic field of the receiving coil 2 on the inner conductor line 31, reduces the heat generated by the wireless charging receiver module, and lowers the temperature rise of the smart terminal; at the same time, it improves the efficiency of wireless charging and accelerates the charging speed of the smart terminal.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A wireless charging receiver module with anti-magnetic leakage capability, characterized in that, include: A first soft magnet (1) is provided with a first through hole (11) penetrating its upper and lower surfaces; A receiving coil (2) is disposed below the first soft magnet (1). The receiving coil (2) includes a first connecting end (21) coiled on the inner side and a second connecting end (22) coiled on the outer side. The flexible circuit board (3) includes an inner conductor line (31) and an outer conductor line (32). The inner conductor line (31) is located above the first soft magnet (1), passes through the first through hole (11), and is soldered to the first connecting end (21). The outer conductor line (32) is located below the first soft magnet (1) and is soldered to the second connecting end (22). The inner conductor line (31) includes multiple sub-lines (311) arranged in parallel. A heat sink is fixed on the first soft magnet (1) and is used to dissipate heat from the receiving coil (2).

2. The anti-magnetic leakage wireless charging receiver module according to claim 1, characterized in that, The wireless charging receiver module also includes a second soft magnet (4), which is disposed above the first soft magnet (1) and covers the connection position between the inner conductor line (31) and the first connection end (21).

3. The anti-magnetic leakage wireless charging receiver module according to claim 2, characterized in that, The coverage area of ​​the first soft magnet (1) is greater than the coverage area of ​​the receiving coil (2), and the coverage area of ​​the second soft magnet (4) is smaller than the coverage area of ​​the receiving coil (2).

4. The anti-magnetic leakage wireless charging receiver module according to claim 1, characterized in that, The wireless charging receiver module also includes a reinforcing component, which is fixed to the first soft magnet (1) or the receiving coil (2).

5. The anti-magnetic leakage wireless charging receiver module according to claim 1, characterized in that, The inner conductor line (31) is a flat conductor, and the portion of the flat conductor above the first soft magnet (1) is divided into multiple parallel and spaced sub-lines (311).

6. The anti-magnetic leakage wireless charging receiver module according to claim 2, characterized in that, The receiving coil (2) is fixed to the first soft magnet (1), the first soft magnet (1) is fixed to the flexible circuit board (3), and the second soft magnet (4) is fixed to the first soft magnet (1) by adhesive bonding.

7. The anti-magnetic leakage wireless charging receiver module according to claim 1, characterized in that, The heat sink is a graphite heat sink or a silicone heat sink.

8. The anti-magnetic leakage wireless charging receiver module according to claim 1, characterized in that, The flexible circuit board (3) is a single-sided or double-sided FPC circuit board.

9. A smart terminal, characterized in that, The device includes a housing, a battery, and a wireless charging receiver module with anti-magnetic leakage as described in any one of claims 1-8, wherein the battery and the wireless charging receiver module are both installed inside the housing, and the wireless charging receiver module is used to charge the battery.

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