Portable wireless mobile power supply

Abstract

The utility model provides a portable wireless mobile power supply, which comprises a shell, a storage battery, a charging unit with a charging coil and a charging magnetic induction sheet, and a discharging unit with a discharging coil and a discharging magnetic induction sheet, and is characterized in that the shell is provided with a first inlaying groove and a second inlaying groove which are respectively matched with the charging magnetic induction sheet and the discharging magnetic induction sheet; and the charging magnetic sheet and the discharging magnetic sheet are respectively embedded in the first embedding groove and the second embedding groove. According to the wireless mobile power supply, a charging / discharging unit and a shell structure are optimally designed, a traditional layout that a charging / discharging coil and a charging / discharging magnetic induction sheet are sequentially overlaid on the two sides of a storage battery is improved into a mode that embedding grooves are formed in the two opposite sides of the shell respectively, and the charging / discharging magnetic induction sheet is embedded into the embedding grooves to be completely embedded into the wall thickness direction of the shell; the thickness of a discharge positioning magnet and a discharge magnetic sheet is omitted, the distance between the storage battery and the corresponding side of the shell is reduced, the overall thickness of the mobile power supply is greatly reduced, the mobile power supply is convenient to hold when magnetically attracted to external equipment for wireless discharging or charging, and the use experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, and in particular to a portable wireless power bank. Background Technology

[0002] Portable power banks, as common charging devices, offer advantages such as portability and instant charging, and are gradually becoming more widespread in daily life. Traditional portable power banks use a wired connection to connect to electronic devices such as mobile phones and tablets to achieve their discharge function, which has drawbacks such as the inconvenience of using and carrying data cables, and the ease with which they can be lost. In recent years, with the gradual development and maturity of wireless charging technology, wireless charging has also emerged for portable power banks.

[0003] Existing portable power banks include a housing and a battery, a charging unit, and a discharging unit housed within the housing. The charging unit includes a charging coil, a charging positioning magnet, and a charging magnetic sheet located on one side of the battery. The discharging unit includes a discharging coil, a discharging positioning magnet, and a discharging magnetic sheet located on the other side of the battery. Both the charging and discharging positioning magnets are annular and surround the outer edges of the charging and discharging coils, respectively. The charging and discharging magnetic sheets are stacked on the sides of the charging and discharging positioning magnets facing away from the battery, guiding and enhancing the magnetic attraction and positioning effect of the charging and discharging positioning magnets on external devices (such as mobile phones, tablets, and wireless charging devices). This type of portable power bank enables wireless charging of electronic devices and precisely positions the receiving end of the electronic device and the transmitting end of the wireless charging device.

[0004] However, in the face of fierce market competition, users have increasingly higher requirements for the thickness of power banks. Because these power banks stack the charging and discharging magnets on the side of the charging and discharging positioning magnets facing away from the battery, the distance between the charging and discharging positioning magnets and the inner wall of the corresponding side of the casing is increased. This significantly increases the overall thickness of the power bank. As a result, when the power bank is wirelessly discharged to the back of an external device (such as a mobile phone or tablet) or wirelessly charged to a wireless charging device, the overall thickness of the external device and the power bank is relatively large. This makes it inconvenient to hold the external device while it is charging, thus reducing the charging experience of the power bank. Utility Model Content

[0005] This utility model proposes a portable wireless mobile power supply to solve the technical problem that existing wireless mobile power supplies stack the charging magnet and the discharging magnet on the side of the charging positioning magnet and the discharging positioning magnet facing away from the battery, which increases the distance between the charging positioning magnet and the discharging positioning magnet and the inner wall of the corresponding side of the shell, as well as the overall thickness of the mobile power supply.

[0006] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0007] This utility model provides a portable wireless mobile power supply, including a housing and a battery disposed inside the housing, and further including: a charging unit and a discharging unit. The charging unit includes a charging coil and a charging magnet, and the discharging unit includes a discharging coil and a discharging magnet.

[0008] The housing is provided with a first inlay groove and a second inlay groove that match the shape of the charging magnetic sheet and the discharging magnetic sheet respectively, and the charging magnetic sheet and the discharging magnetic sheet are respectively embedded in the first inlay groove and the second inlay groove.

[0009] Preferably, the first and second inlay grooves are located on the inner or outer sidewall of the housing.

[0010] Preferably, the charging unit and the discharging unit are located on opposite sides of the battery facing the casing, and the first inlay groove and the second inlay groove are respectively located on opposite sides of the casing facing the charging unit and the discharging unit.

[0011] Preferably, both the charging and discharging magnetic sheets are made of magnets, and the magnetic poles of the charging and discharging magnetic sheets are opposite to those of the external device.

[0012] Preferably, both the charging magnet and the discharging magnet are made of ferromagnetic material.

[0013] Preferably, both the charging magnetic sheet and the discharging magnetic sheet are annular, and the charging magnetic sheet and the discharging magnetic sheet are respectively arranged around the outer edge of the charging coil and the discharging coil.

[0014] Preferably, both the charging magnet and the discharging magnet have clearance gaps.

[0015] Furthermore, both the charging and discharging magnets are made of ferromagnetic materials, and the discharge unit also includes:

[0016] The discharge positioning magnet is a ring-shaped magnet that matches the shape of the discharge magnetic sheet. The discharge positioning magnet is arranged around the outer edge of the discharge coil and is directly opposite to the discharge magnetic sheet. The magnetic pole of the discharge positioning magnet is opposite to the magnetic pole of the external device.

[0017] The charging unit also includes:

[0018] The charging positioning magnet is a ring-shaped magnet that matches the shape of the charging magnetic sheet. The charging positioning magnet surrounds the outer edge of the charging coil and is directly opposite to the charging magnetic sheet. The magnetic pole of the charging positioning magnet is opposite to the magnetic pole of the external device.

[0019] Preferably, the portable wireless power bank also includes a circuit board disposed inside the housing, and the battery, charging coil and discharging coil are all electrically connected to the circuit board.

[0020] Preferably, the housing is provided with several data interfaces for connecting external devices or power sources, and the data interfaces are electrically connected to the circuit board.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The portable wireless power bank provided by this utility model optimizes the design of the charging unit, discharging unit, and housing structure. The traditional charging / discharging unit layout, where charging / discharging coils and charging / discharging magnetic sheets are sequentially stacked on opposite sides of the battery, is improved by providing first and second embedding slots on the opposite side walls of the housing corresponding to the charging and discharging units, matching the shapes of the charging and discharging magnetic sheets. The charging and discharging magnetic sheets are then embedded into the first and second embedding slots respectively, thus completely embedding them into the housing. By thinning the inner wall of the power bank, the charging and discharging magnetic sheets are fixed at the upper limit of the thickness direction of the casing, thus eliminating the need for the charging positioning magnet and the charging magnetic sheet, as well as the discharging positioning magnet and the discharging magnetic sheet. This reduces the distance between the battery and the inner wall of the corresponding side of the casing, significantly reducing the overall thickness of the power bank. When the power bank is magnetically attached to the back of an external device (such as a mobile phone or tablet) for wireless discharge on the discharging side or to a wireless charging device for wireless charging on the charging side, it is easy to hold and improves the charging experience. Attached Figure Description

[0023] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0024] Figure 1 A three-dimensional structural schematic diagram of a first embodiment of the portable wireless mobile power supply provided by this utility model;

[0025] Figure 2 for Figure 1 An exploded structural diagram of an embodiment of a portable wireless mobile power supply.

[0026] Figure 3 for Figure 1 Another perspective exploded structural diagram of Embodiment 1 of the portable wireless mobile power supply;

[0027] Figure 4 A three-dimensional structural schematic diagram of Embodiment 2 of the portable wireless mobile power supply provided by this utility model;

[0028] Figure 5 for Figure 4 An exploded structural diagram of Embodiment 2 of the portable wireless mobile power supply;

[0029] Figure 6 for Figure 4 Another perspective exploded structural diagram of Embodiment 2 of the portable wireless mobile power supply.

[0030] The main markings in the attached figures are as follows:

[0031] 1. Housing; 11. Bottom housing; 111. Second inlay slot; 12. Top housing; 121. Second inlay slot; 122. Charging positioning mark; 2. Charging unit; 21. Charging coil; 22. Charging magnet; 221. First clearance notch; 23. Charging positioning magnet; 3. Discharge unit; 31. Discharge coil; 32. Discharge magnet; 321. Second clearance notch; 33. Discharge positioning magnet; 4. Battery; 5. Circuit board; 6. Data interface. Detailed Implementation

[0032] Please refer to the following: Figure 1-3 In Embodiment 1 of the portable wireless power bank provided by this utility model:

[0033] The portable wireless power bank includes a housing 1 and a battery 4 disposed within the housing 1, and also includes:

[0034] The charging unit 2 includes a charging coil 21 and a charging magnetic sheet 22, and the discharging unit 3 includes a discharging coil 31 and a discharging magnetic sheet 32.

[0035] The housing 1 is provided with a first inlay groove 111 and a second inlay groove 121 that match the shape of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​respectively. The charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are respectively embedded in the first inlay groove 111 and the second inlay groove 121.

[0036] Please refer to the following: Figure 1-3 In Embodiment 1, the housing 1 includes a top shell 12 and a bottom shell 11 that are joined together. The bottom shell 11 and the top shell 12 are located on opposite sides of the housing 1 facing the charging unit 2 and the discharging unit 3, respectively. The first inlay groove 111 and the second inlay groove 121 are respectively provided on the bottom shell 11 and the top shell 12.

[0037] Please refer to the following: Figure 1-3 In Embodiment 1, the first inlay groove 111 and the second inlay groove 121 are provided on the bottom shell 11 and top shell 12 of the housing 1 facing or away from the inner or outer sidewall of the battery 4.

[0038] Please refer to the following: Figure 1-3 As a preferred embodiment of Example 1, the charging unit 2 and the discharging unit 3 are located on opposite sides of the battery 4 facing the housing 1 (the charging unit 2 and the discharging unit 3 are located on the front and back sides of the battery 4 respectively), and a pair of first inlay grooves 111 and second inlay grooves 121 are respectively provided in the opposite side walls of the housing 1 facing the charging unit 2 and the discharging unit 3 (i.e., the walls of the bottom shell 11 and the top shell 12).

[0039] Please refer to the following: Figure 1-3 As a preferred embodiment of Example 1, the first mounting groove 111 and the second mounting groove 121 are located on the inner sidewalls of the housing 1 facing the charging unit 2 and the discharging unit 3 (i.e., the walls of the bottom shell 11 and the top shell 12). In other words, the outer sidewalls of the housing 1 facing the charging unit 2 and the discharging unit 3 have a certain wall thickness with the bottom surface of the first mounting groove 111 and the second mounting groove 121. Furthermore, the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are embedded in the corresponding first mounting groove. When the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are embedded in the first and second embedding slots 111 and 121, the side of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​facing the battery 4 is flush with the inner sidewall of the opposite side wall of the housing 1 facing the charging unit 2 and the discharging unit 3 (i.e., the wall of the bottom shell 11 and the top shell 12). While fully embedding the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​into the wall thickness direction of the housing 1 and achieving the overall thinning of the power supply, it also achieves the upper limit and fixed embedding of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​in the first embedding slot 111 and the second embedding slot 121 in the thickness direction of the housing 1.

[0040] Please refer to the following: Figure 1-3In another embodiment of Example 1, the first mounting groove 111 and the second mounting groove 121 are located on the opposite side walls of the housing 1 facing the charging unit 2 and the discharging unit 3 (i.e., the walls of the bottom shell 11 and the top shell 12), facing away from the outer side walls of the charging unit 2 and the discharging unit 3. That is, there is a certain wall thickness between the inner side surface (inner side wall) of the opposite side walls of the housing 1 facing the charging unit 2 and the discharging unit 3 (i.e., the walls of the bottom shell 11 and the top shell 12) and the bottom surface of the first mounting groove 111 and the second mounting groove 121, and the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are embedded in the corresponding first mounting groove 111 and the second mounting groove 121. When the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are embedded in the first and second embedding slots 111 and 121 respectively, the side of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​facing away from the battery 4 is flush with the opposite side walls of the housing 1 facing away from the charging unit 2 and the discharging unit 3 (i.e., the walls of the bottom shell 11 and the top shell 12) facing away from the discharging unit 3. Similarly, the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​can be completely embedded in the wall thickness direction of the housing 1, thereby achieving an overall thinning of the power supply and simultaneously achieving upper limit positioning and fixed embedding of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​in the thickness direction of the housing 1.

[0041] In summary, the portable wireless power bank provided by this utility model redesigns the structure of the charging unit 2, the discharging unit 3, and the housing 1. The traditional layout of the discharging unit 3, where charging coils 21 / discharging coils 31 and charging magnets 22 / discharging magnets 32 are sequentially stacked on opposite sides of the battery 4, is improved by setting a first inlay groove 111 and a second inlay groove 121 on the opposite side walls of the housing 1 (i.e., the walls of the bottom shell 11 and the top shell 12) that match the shapes of the charging magnets 22 and the discharging magnets 32. The charging magnets 22 and the discharging magnets 32 are then embedded into the first inlay groove 111 and the second inlay groove 121. In the slot 121, the charging magnet 22 and the discharging magnet 32 ​​are completely embedded inside the wall thickness direction of the housing 1, thereby achieving an overall thinning of the power bank. At the same time, the charging magnet 22 and the discharging magnet 32 ​​are fixed and positioned in the thickness direction of the housing 1. This eliminates the need for the thickness of the charging positioning magnet 23 and the charging magnet 22, as well as the discharging positioning magnet 33 and the discharging magnet 32. As a result, the distance between the battery 4 and the inner wall of the corresponding side of the housing 1 is reduced, significantly reducing the overall thickness of the power bank. This makes it easier to hold the power bank when it is magnetically attached to the back of an external device (such as a mobile phone or tablet) for wireless charging, improving the charging experience.

[0042] Please refer to the following: Figure 1-3 In one embodiment of Example 1, both the charging magnet 22 and the discharging magnet 32 ​​are made of ferromagnetic materials that can be attracted by magnets. For example, iron sheets, cobalt sheets, or nickel sheets made of iron, cobalt, or nickel materials can be used as the charging magnet 22 and the discharging magnet 32.

[0043] Please refer to the following: Figure 1-3 In another embodiment of Example 1, both the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are made of magnetic material, and the magnetic poles of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are opposite to the side of the external device that is magnetically attracted. As a preferred embodiment of this example, both the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are annular, and the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are respectively arranged around the corresponding outer circumference of the charging coil 21 and the discharging coil 31. The first inlay groove 111 and the second inlay groove 121 are annular in shape that matches the shape of the charging coil 21 and the discharging magnetic sheet 32.

[0044] Please refer to the following: Figure 1-3 As a preferred embodiment of the first embodiment, the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are annular in shape, and the first inlay groove 111 and the second inlay groove 121 are annular in shape that matches the shape of the charging magnetic sheet 22 and the discharging magnetic sheet 32.

[0045] Please refer to the following: Figure 1-3 In Embodiment 1, when the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are a ring-shaped integral made of magnetic material, the inner circumference of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​is the N pole or S pole (and the magnetic poles of the inner circumference of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are opposite), and the outer circumference of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​is the N pole or S pole opposite to the inner circumference (and the magnetic poles of the outer circumference of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are opposite). One side of the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are respectively bonded and fixed to the opposite sides of the battery 4 with their respective sides facing inward. The opposite side of the magnetic strip 32 faces outward for alignment and attraction with an external device. Correspondingly, the external device, such as a mobile phone, is equipped with a ring-shaped device positioning magnet (not shown in the figure) that matches the charging magnetic strip 22 and the discharging magnetic strip 32. The inner circumference of the device positioning magnet has an S or N pole opposite to the inner circumference of the charging magnetic strip 22 and the discharging magnetic strip 32, and the outer circumference of the device positioning magnet has an S or N pole that repels the outer circumference of the charging magnetic strip 22 and the discharging magnetic strip 32. This allows the opposite sides of the wireless power bank's charging unit 2 and discharging unit 3 to be magnetically attracted and fixed to the external device.

[0046] In other embodiments of Example 1 (not shown in the figure), the charging magnet 22 and the discharging magnet 32 ​​may also be rectangular or other types of rings.

[0047] In other embodiments of Embodiment 1 (not shown in the figure), multiple charging magnetic sheets 22 and discharging magnetic sheets 32 are provided, and the multiple charging magnetic sheets 22 and discharging magnetic sheets 32 are arranged radially and evenly at intervals around the corresponding outer edges of the charging coil 21 and the discharging coil 31. The multiple charging magnetic sheets 22 and discharging magnetic sheets 32 can be embedded in the same annular first embedding groove 111 and second embedding groove 121, or the housing 1 is provided with multiple first embedding grooves 111 and second embedding grooves 121 that match the number and shape of the charging magnetic sheets 22 and discharging magnetic sheets 32, and each charging magnetic sheet 22 and discharging magnetic sheet 32 ​​is embedded in the corresponding first embedding groove 111 and second embedding groove 121.

[0048] Please refer to the following: Figure 1-3 In Embodiment 1, the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​are respectively provided with a first clearance notch 221 and a second clearance notch 321, so that the lead wires of the charging coil 21 and the discharging coil 31 inside the charging magnetic sheet 22 and the discharging magnetic sheet 32 ​​can pass through the clearance notch 321 and be electrically connected to the circuit board 5 of the mobile power supply.

[0049] Please refer to the following: Figure 4-6 In Embodiment 2 of the portable wireless power bank provided by this utility model:

[0050] Both the charging magnet 22 and the discharging magnet 32 ​​are made of ferromagnetic material that can be attracted by a magnet. The discharge unit 3 also includes:

[0051] The discharge positioning magnet 33 is a ring-shaped magnet that matches the shape of the discharge magnetic sheet 32. The discharge positioning magnet 33 is arranged around the outer edge of the discharge coil 31 and is directly opposite to the discharge magnetic sheet 32 ​​to further enhance the magnetic attraction. The magnetic poles of the discharge positioning magnet 33 are opposite to those of the external device.

[0052] Charging unit 2 also includes:

[0053] The charging positioning magnet 23 is a ring-shaped magnet that matches the shape of the charging magnetic sheet 22. The charging positioning magnet 23 is arranged around the outer edge of the charging coil 21 and is directly opposite to the charging magnetic sheet 22 to further enhance the magnetic attraction. The magnetic poles of the charging positioning magnet 23 are opposite to those of the external device.

[0054] Since the charging magnet 22 and the discharging magnet 32 ​​have a certain magnetizing effect, the charging positioning magnet 23 and the discharging positioning magnet 33 are only set when it is necessary to enhance the magnetic attraction force. The thickness of the charging positioning magnet 23 and the discharging positioning magnet 33 can be greatly reduced, avoiding the addition of the charging positioning magnet 23 and the discharging positioning magnet 33, which would cause a significant increase in the overall thickness of the portable wireless power bank. This maintains the magnetic attraction performance while ensuring the user experience.

[0055] Please refer to the following: Figure 4-6 In Embodiment Two, when the charging magnet 22 and the discharging magnet 32 ​​are a ring-shaped integral made of ferromagnetic material, both the charging positioning magnet 23 and the discharging positioning magnet 33 are ring-shaped. The magnetic poles of the inner and outer circumferences of the charging and discharging positioning magnets 23 and 33 are opposite to those of the charging and discharging magnets 22 and 32, respectively. Simultaneously, the inner and outer circumferences of the device positioning magnets of two external devices (such as a mobile phone (not shown) and a wireless charging device (not shown) on opposite sides of the power bank are opposite to the magnetic poles of the corresponding discharging positioning magnets 33 and charging positioning magnets 23. Because both the discharging positioning magnet 33 and the charging positioning magnet 23 are ring-shaped, and because their magnetic poles are opposite, the wireless power bank provided by this invention can be attracted and positioned with external devices such as mobile phones and wireless charging devices without mutual repulsion. This also reduces the size, width, and thickness of the positioning magnets, further reducing the overall thickness and volume of the power bank.

[0056] Please refer to the following: Figure 1-6 In the common implementation of Embodiments 1 and 2, the portable wireless power supply also includes a circuit board 5 disposed inside the housing 1, and the battery 4, charging coil 21 and discharging coil 31 are all electrically connected to the circuit board 5.

[0057] In the common implementation of Embodiments 1 and 2 (not shown in the figure), the portable wireless power bank also includes a pair of magnetic shielding sheets (not shown in the figure), which are respectively placed between the charging unit 2 and the battery 4, and between the discharging unit 3 and the battery 4, to achieve the magnetic shielding effect of the portable wireless power bank.

[0058] Please refer to the following: Figure 1-6 In the preferred embodiment of both Embodiment 1 and Embodiment 2, the housing 1 is provided with a plurality of data interfaces 6 for connecting external devices or power sources, and the data interfaces 6 are electrically connected to the circuit board 5.

[0059] In the preferred embodiment shared by Examples 1 and 2, the data interface 6 may include common interfaces such as Lightning, Type-C micro-USB, mini-USB, HDMI, and USB. This allows the portable wireless power bank to achieve normal wireless charging while also allowing for wired charging and discharging.

[0060] In the preferred embodiment of both Examples 1 and 2, the storage battery 4 is a lithium battery.

[0061] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable wireless mobile power supply, comprising a housing (1) and a battery (4) disposed within the housing (1), characterized in that, Also includes: The charging unit (2) includes a charging coil (21) and a charging magnet (22), and the discharging unit (3) includes a discharging coil (31) and a discharging magnet (32). The housing (1) is provided with a first inlay groove (111) and a second inlay groove (121) that match the shape of the charging magnetic sheet (22) and the discharging magnetic sheet (32), respectively. The charging magnetic sheet (22) and the discharging magnetic sheet (32) are respectively embedded in the first inlay groove (111) and the second inlay groove (121).

2. The portable wireless power bank as described in claim 1, characterized in that, The first inlay groove (111) and the second inlay groove (121) are provided on the inner or outer side wall of the housing (1).

3. The portable wireless power bank as described in claim 2, characterized in that, The charging unit (2) and the discharging unit (3) are respectively located on opposite sides of the battery (4) facing the housing (1), and the first inlay groove (111) and the second inlay groove (121) are respectively provided on opposite sides of the housing (1) facing the charging unit (2) and the discharging unit (3).

4. The portable wireless power bank as described in any one of claims 1-3, characterized in that, Both the charging magnetic sheet (22) and the discharging magnetic sheet (32) are made of magnet material, and the magnetic poles of the charging magnetic sheet (22) and the discharging magnetic sheet (32) are opposite to the magnetic poles of the external device.

5. The portable wireless power bank as described in any one of claims 1-3, characterized in that, Both the charging magnet (22) and the discharging magnet (32) are made of ferromagnetic material.

6. The portable wireless power bank as described in any one of claims 1-3, characterized in that, The charging magnetic sheet (22) and the discharging magnetic sheet (32) are both annular, and the charging magnetic sheet (22) and the discharging magnetic sheet (32) are respectively arranged around the outer edge of the charging coil (21) and the discharging coil (31).

7. The portable wireless power bank as described in claim 6, characterized in that, The charging magnet (22) and the discharging magnet (32) are respectively provided with a first clearance notch (221) and a second clearance notch (321).

8. The portable wireless power bank as described in claim 6, characterized in that, Both the charging magnet (22) and the discharging magnet (32) are made of ferromagnetic material, and the discharging unit (3) further includes: The discharge positioning magnet (33) is a ring-shaped magnet that matches the shape of the discharge magnetic sheet (32). The discharge positioning magnet (33) is arranged around the outer edge of the discharge coil (31) and is directly opposite to the discharge magnetic sheet (32). The magnetic poles of the discharge positioning magnet (33) are opposite to those of the side of the external device that is magnetically attracted. The charging unit (2) further includes: The charging positioning magnet (23) is a ring-shaped magnet that matches the shape of the charging magnet (22). The charging positioning magnet (23) is arranged around the outer edge of the charging coil (21) and is directly opposite to the charging magnet (22). The magnetic pole of the charging positioning magnet (23) is opposite to the magnetic pole of the external device.

9. The portable wireless power bank as described in claim 8, characterized in that, The portable wireless power bank also includes a circuit board (5) disposed inside the housing (1), and the battery (4), the charging coil (21) and the discharging coil (31) are all electrically connected to the circuit board (5).

10. The portable wireless power bank as described in claim 9, characterized in that, The housing (1) is provided with several data interfaces (6) for connecting external devices or power sources, and the data interfaces (6) are electrically connected to the circuit board (5).

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