TW202110035A - Magnetic wireless charging device - Google Patents

Abstract

A magnetic wireless charging device is disclosed. The magnetic wireless charging device includes a battery module, a wireless charging module, an external charging module and a housing. Due to the special design of a magnet group, the magnetic wireless charging device can be temporarily combined with a smart phone with a wireless power receiving coil without interfering wireless charging. It is not to leave the smartphone or reduce the charging performance due to the uneven position or vibration of the magnetic wireless charging device.

Description

Magnetic suction wireless charging device

The invention relates to a wireless charging device, in particular to a magnetic suction type wireless charging device with a magnet group that can be adsorbed to a mobile communication device for wireless charging.

With the advancement of science and technology, electronic products have become more and more lightweight, and have gradually evolved from the need for external wires to wireless designs. However, after all, electronic products still need power to operate, and these external power needs to be stored in the secondary battery inside. Considering that there is no external wire, wireless charging technology is undoubtedly the mainstream of today's development.

The current wireless charging technology is dominated by technologies led by the AirFuel and WPC alliances. Although the content of the specification is different, the physical operation is all through the use of the magnetic field generated between the coils. The wireless charging device conducts electrical energy to the terminal device, and the terminal device converts the received energy into electrical energy and stores it in the device's secondary battery. The principle of electric energy conduction is inductive coupling, which can ensure that there are no exposed lines, which not only saves the messy transmission lines between equipment, but also is safer for electronic equipment that often comes into contact with conductive media such as liquids.

The most frequently used and most important electronic product in people's lives is the smart phone. As wireless charging technology matures, more and more smartphones have built-in wireless charging modules for wireless charging. However, for smart phone charging, there are the following problems. First, it is not easy to accurately align the wireless charging receiving coil of the smart phone and the wireless charging transmitting coil of the charger, resulting in low charging efficiency. Unless it is a dedicated wireless charger for a smart phone, the general wireless charger will have this problem. Second, the wireless charging environment for wireless chargers and smartphones is not necessarily a stable surface. If the wireless charger is placed on an uneven desktop or is used while driving, there will be bumps, even when charging at the beginning The coil is well positioned. As time goes by, the smart phone will gradually slip out of the optimal charging range, or even detach from the wireless charger.

Therefore, in order to avoid the aforementioned problems in the wireless charging operation of smart phones, the inventors developed the magnetic suction wireless charging device of the present invention based on years of research and development experience in related fields.

The object of the present invention is to provide a magnetically-attracted wireless charging device, which includes: a battery module for storing power from an external power source and releasing the stored power; a wireless charging module The set includes: a wireless charging coil; and a wireless charging circuit, electrically connected to the battery module and the wireless charging coil, for controlling the battery module to discharge, and passing the power from the battery module through the battery module The magnetic field generated by the wireless charging coil is transmitted to a corresponding wireless power receiving coil; and a casing covering the battery module and the wireless charging circuit, and a plurality of magnet groups are arranged on the inner wall for adsorption Corresponding to the magnet installed inside the phone or on the phone case. Wherein, the plurality of magnet groups are arranged around the outside of the wireless charging coil.

The aforementioned magnetic wireless charging device may further include an external charging module, including: an external charging connector exposed in the housing, and electrically connected to the external power source through a power line and a charging plug, for receiving Power from an external power source; and an external charging circuit installed inside the casing and electrically connected to the battery module and the external charging connector for charging the battery module with power from the external power source.

The aforementioned magnet set may further include: a circular magnet; a shielding ring sleeved on the outside of the circular magnet; and a circular shielding plate provided on the bottom of the circular magnet.

According to the present invention, the shielding ring can be made of a high-permeability material that has been processed at a high temperature, and the high-permeability material can be nickel-iron alloy, silicon steel, or cobalt-iron alloy.

According to the present invention, the circular shielding plate can also be made of high-permeability materials treated at high temperature, and the high-permeability materials can also be nickel-iron alloys, silicon steels or cobalt-iron alloys.

Preferably, the external power source is an AC-to-DC transformer, and the battery module may include a secondary battery or a secondary battery pack, and the number of magnet groups may be 4 or 8, distributed in a point-symmetrical manner.

The present invention also provides a magnetically-attracted wireless charging device, including: a battery module for storing power from an external power source and releasing the stored power; a wireless charging module including: a wireless charging coil; and The wireless charging circuit is electrically connected to the battery module and the wireless charging coil to control the battery module to discharge, and transmit the power from the battery module to the corresponding one through the magnetic field generated by the wireless charging coil. Wireless power receiving coil transmission; and a casing that covers the battery module and the wireless charging circuit, and is provided with a plurality of iron sheets on the inner wall for absorbing the correspondingly arranged inside the mobile phone or on the mobile phone case magnet. The plurality of iron sheets are arranged around the outside of the wireless charging coil in a mechanism-fixed, adhesive-fixed or enveloping type.

Due to the special design of the magnet set, the magnetic wireless charging device can be temporarily combined with a smartphone with a wireless power receiving coil without interfering with wireless charging, and will not be affected by the location of the magnetic wireless charging device. It is flattened or vibrated, and the smartphone is dropped or the charging performance is reduced.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

Please refer to FIG. 1, which is a block diagram of components of a magnetic-attractive wireless charging device 1 according to an embodiment of the present invention. The magnetic wireless charging device 1 is composed of a battery module 10, a wireless charging module 20, an external charging module 30 and a casing 40. The functions, installation methods and interactions of the aforementioned components will be described in detail below.

The battery module 10 can be used to store power from an external power source (not shown), and can release the stored power to wirelessly charge an external electronic product having a power module for receiving wireless charging. Since the wireless charging is performed by direct current, the battery module 10 needs to provide direct current. According to the present invention, the battery module 10 may include one secondary battery or one secondary battery pack (two or more secondary batteries). The secondary battery can be, but not limited to, nickel-cadmium battery (Ni-Cd), nickel-hydrogen battery (Ni-MH), lithium ion battery (Li-ion) or lithium polymer battery (Li-polymer, also known as lithium polymer). battery). In terms of type, it can be an 18650 rechargeable battery, or a flat rechargeable battery used in a smart phone can be selected according to the design requirements of the magnetic-attracted wireless charging device 1. Due to the requirements of the battery module 10, the external power supply should also be a device that can provide direct current, such as an AC-to-DC transformer.

The wireless charging module 20 (marked by the short dashed box in Figure 1) is the most important device for the magnetic wireless charging device 1 to wirelessly charge external electronic devices. It includes a wireless charging coil 21 and a wireless charging circuit twenty two. The wireless charging coil 21 is formed by winding an enameled wire around a specific circle center, and its purpose is to form a magnetic field after being energized, so as to form electromagnetic induction with another coil that is connected to it for wireless charging. The wireless charging circuit 22 is a set of power management circuits, which are electrically connected to the battery module 10 and the wireless charging coil 21 to control the battery module 10 for discharging, and can transmit the power from the battery module 10 through the wireless charging coil The magnetic field generated by 21 is transmitted to a corresponding wireless power receiving coil (such as a wireless power receiving coil installed on a smart phone).

The external charging module 30 (marked by the long dashed frame in FIG. 1) is a device for supplementing power to the battery module 10 in the magnetic wireless charging device 1. The external charging module 30 includes an external charging connector 31 and an external charging circuit 32. The external charging connector 31 is exposed from the housing 40 and can be electrically connected to the aforementioned external power source through a power line (not shown) and a charging plug (not shown) to receive power from the external power source. Generally speaking, the specification of the external charging connector 31 can be one of Lightning, USB Type-C (USB-C) and micro USB. The external charging circuit 32 is also a set of power management circuits, installed inside the casing 40, electrically connected to the battery module 10 and the external charging connector 31, and used to charge the battery module 10 with power from the aforementioned external power source.

The housing 40 is a device for protecting the battery module 10, the wireless charging module 20 and the external charging module 30. It completely covers the battery module 10 and the wireless charging module 20 and partially covers the external charging module 30 (exposed part External charging connector 31). The housing 40 may be made of plastic material, such as ABS. It is better not to be made of metals or alloys with better heat dissipation properties, so as not to affect the magnetic field of the wireless charging coil 21. The housing 40 is provided with a plurality of magnet groups on the inner wall. Regarding the composition of the magnet group, please refer to FIG. 2, which is a schematic diagram of a magnet group 41 in the magnetic-attractive wireless charging device 1. The magnet group 41 includes: a circular magnet 411, a shielding ring 412, and a circular shielding plate 413. The circular magnet 411 may be a general permanent magnet, preferably a strong magnet. The shielding ring 412 is sleeved on the outside of the circular magnet 411, and the magnetic field formed by the circular magnet 411 can be limited to the range indicated by the arrow in the opening direction (Figure 2), so as not to interfere with the magnetic field formed by the wireless charging coil 21 and reduce Wireless charging efficiency. In terms of materials, the shielding ring 412 can be made of high-temperature-treated high-permeability materials, such as nickel-iron alloy (permalloy), silicon steel, or cobalt-iron alloy. The circular shielding plate 413 is arranged at the bottom of the circular magnet 411 to limit the magnetic force of the circular magnet 411. In other words, the side of the circular magnet 411 without the circular shielding plate 413 has strong magnetic force and can be used to attract mobile phones or mobile phone cases; the side of the circular magnet 411 with the circular shielding plate 413 has weak magnetic force and faces the case. The electronic components in the body 40 will not affect its function. In terms of materials, the circular shielding plate 413 can also be made of a high-permeability material that has been processed at a high temperature; as mentioned above, the high-permeability material can also be nickel-iron alloy, silicon steel, or cobalt-iron alloy.

To be more precise, the function of the magnet group 41 is to attract the magnets correspondingly arranged inside the mobile phone or on the mobile phone case. In order to understand this, please refer to Fig. 3, which shows the installation and use of the magnetic suction wireless charging device 1 with a smart phone 3 and a mobile phone case 2. In this example, the appearance of the magnetically attracted wireless charging device 1 is a flat rectangular parallelepiped, with 4 magnet groups 41 (shown in the thin circle and dashed frame) arranged on the wireless charging coil 21 (shown in the thick circle and dashed frame). ) Peripheral. The smart phone 3 is also provided with a wireless power receiving coil 5 inside, which can form a magnetic field with the wireless charging coil 21 to generate electric current through electromagnetic induction to charge the smart phone 3. The mobile phone case 2 is tailor-made according to the smart phone 3. In addition to the appearance of the smart phone 3, the control button has a corresponding protrusion design, and the power hole and the speaker position have corresponding slots, the phone case 2 also has four magnets 4 embedded. The position arrangement of the four magnets 4 is the same as the position arrangement of the four magnet groups 41. Therefore, when the smart phone 3 is installed in the phone case 2, it can be temporarily fixed to the magnetically attracted wireless charging device 1 by the way that the magnet 4 and the magnet group 41 are attracted to each other. At this time, the wireless charging coil 21 is facing the wireless power receiving coil 5, that is, at the best wireless charging position. Since several magnet groups 41 are arranged around the outside of the wireless charging coil 21, the magnetic lines of force (magnetic field) of the magnet group 41 have the least influence on the magnetic field between the wireless charging coil 21 and the wireless power receiving coil 5. When the magnetic suction wireless charging device 1 is used, wireless charging can also be performed.

The magnetic wireless charging device 1 and the magnet group 41 thereon also have other combinations. Please refer to Fig. 4, which is a schematic diagram of the appearance of another embodiment of a magnetic-attracted wireless charging device. In this embodiment, the outer appearance of the housing 40 of the magnetic-attracted wireless charging device 1 is an oblate cylinder, and the magnet assembly 41 (shown in the thin circle and dashed frame) is arranged around the wireless charging coil 21 inside. Compared with the previous embodiment, the magnet assembly 41 of this embodiment is more densely divided and has stronger magnetic attraction. It can also be seen from the above two implementation forces that the magnet groups are distributed in a point-symmetrical manner, and the number is 4, 8, or even more.

According to the present invention, in another embodiment, the magnet group 41 on the magnetic-attractive wireless charging device 1 can also be replaced by an iron sheet, and its function is also to attract a magnet corresponding to the inside of the mobile phone or the mobile phone case. The aforementioned several iron sheets can be arranged around the outside of the wireless charging coil 21 in a mechanism fixed, adhesive-fixed or enveloping type.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

1: Magnetic wireless charging device 2: mobile phone case 3: smart phone 4: Magnet 5: Wireless power receiving coil 10: Battery module 20: Wireless charging module 21: Wireless charging coil 22: wireless charging circuit 30: External charging module 31: External charging connector 32: External charging circuit 40: shell 41: Magnet group 411: round magnet 412: Shield Ring 413: Circular shielding plate

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings that need to be used in the embodiments. Fig. 1 is a block diagram of components of a magnetic-attracted wireless charging device according to an embodiment of the present invention, Fig. 2 is a schematic diagram of a magnet group in the magnetic-attracted wireless charging device, and Fig. 3 shows the magnetic-attracted wireless charging device and a smart device For the installation and use of a mobile phone and a mobile phone case, FIG. 4 is a schematic diagram of the appearance of another embodiment of a magnetic suction wireless charging device.

1: Magnetic wireless charging device

10: Battery module

20: Wireless charging module

21: Wireless charging coil

22: wireless charging circuit

30: External charging module

31: External charging connector

32: External charging circuit

40: shell

Claims (10)

A magnetic suction type wireless charging device, including: A battery module to store power from an external power source and release the stored power; A wireless charging module, including: A wireless charging coil; and A wireless charging circuit is electrically connected to the battery module and the wireless charging coil to control the battery module to discharge, and transmit the power from the battery module through the magnetic field generated by the wireless charging coil to the corresponding A wireless power receiving coil transmits; and A casing that covers the battery module and the wireless charging circuit, and is provided with a plurality of magnet groups on the inner wall for attracting magnets corresponding to the inside of the mobile phone or on the mobile phone case, Wherein, the plurality of magnet groups are arranged around the outside of the wireless charging coil. The magnetic suction wireless charging device as described in item 1 of the scope of patent application further includes an external charging module, including: An external charging connector, exposed in the housing, can be electrically connected to the external power source through a power cord and a charging plug, for receiving power from the external power source; and An external charging circuit is installed inside the casing and is electrically connected to the battery module and the external charging connector for charging the battery module with power from the external power source. According to the magnetic suction type wireless charging device described in item 1 of the scope of patent application, the magnet set further includes: A round magnet; A shielding ring sleeved on the outside of the circular magnet; and A circular shielding plate is arranged at the bottom of the circular magnet. As described in the 3rd item of the scope of patent application, the shielding ring is made of high-permeability materials treated with high temperature. As described in item 4 of the scope of patent application, the magnetically-attracted wireless charging device, wherein the high-permeability material is nickel-iron alloy, silicon steel or cobalt-iron alloy. According to the magnetic suction type wireless charging device described in item 3 of the scope of patent application, the circular shielding plate is made of high-temperature-treated high-magnetic-permeability material. As described in item 6 of the scope of patent application, the magnetically attracted wireless charging device, wherein the high magnetic permeability material is nickel-iron alloy, silicon steel or cobalt-iron alloy. As described in the first item of the scope of patent application, the magnetic suction type wireless charging device, wherein the battery module includes a secondary battery or a secondary battery pack. As for the magnetic suction type wireless charging device described in item 1 of the scope of patent application, the number of the magnet groups is 4 or 8, which are distributed in a point-symmetrical manner. A magnetic suction type wireless charging device, including: A battery module to store power from an external power source and release the stored power; A wireless charging module, including: A wireless charging coil; and A wireless charging circuit is electrically connected to the battery module and the wireless charging coil to control the battery module to discharge, and transmit the power from the battery module through the magnetic field generated by the wireless charging coil to the corresponding A wireless power receiving coil transmits; and A casing that covers the battery module and the wireless charging circuit, and is provided with a plurality of iron sheets on the inner wall for absorbing magnets corresponding to the inside of the mobile phone or on the mobile phone case, Wherein, the plurality of iron sheets are arranged around the outside of the wireless charging coil in a mechanism-fixed, adhesive-fixed or enveloping type.

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