Description:TECHNICAL FIELD
[001] The present invention relates generally to a system and method for wireless charging of a portable device.
BACKGROUND
[002] With the development of mobile communication technologies, mobile phones have become necessary communication tools in our daily life. When using a mobile phone, the user often feels inconvenient when using the wired charging of the mobile phone. The power supply can then be disconnected, and the device will continue to run for a short period of time until the battery is depleted. The voltage and power requirements of the different devices vary, and to date there is currently no standardized connector for the devices. As a result of this, each mobile device is invariably sold or distributed bundled with its own charger. The costs associated with these multiple different types and numbers of charger are paid by the consumer indirectly by being incorporated into the prices being charged for the mobile device.
[003] Currently, in the relevant art, many wireless mobile phone charging solutions have been proposed. Among these wireless mobile phone charging solutions, 13.56 MHz induction charging solution has been mature relatively. This solution merely requires to place a mobile phone on an induction base of a charger and can charge the mobile phone by means of induction without plugging. This convenient and rapid charging method has been appreciated by many mobile phone manufacturers. However, the design defect of the above wireless charging solution lies in that during mass manufacture, the key part in this solution, i.e., high permeability material, is easy to fail after long-term use, which brings risks into the charging process of the mobile phone. However, each of these methods suffers from poor power transfer, in that most of the power in the primary is not picked up in the receiver, and thus the overall power efficiency of the charger is very low.
[004] Therefore, there is a need of a system which overcomes the aforementioned problems.
SUMMARY
[005] Embodiments of the present disclosure present technological improvements as solutions to one or more of the above-mentioned technical problems.
[006] Before the present subject matter relating to a system and method for wireless charging of a portable device, it is to be understood that this application is not limited to the particular system described, as there can be multiple possible embodiments which are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the implementations or versions or embodiments only and is not intended to limit the scope of the present subject matter.
[007] This summary is provided to introduce aspects related to a system and method for wireless charging of a portable device. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the present subject matter.
[008] In an embodiment, a wireless charging system for a portable device is provided. The wireless charging system includes a charging base station configured to generate an electromagnetic field for wirelessly transmitting power. Further, the wireless charging system includes a portable device comprising a wireless power receiver module configured to receive power wirelessly from the charging base station, and a communication means facilitating communication between the charging base station and the portable device for optimizing power transmission, wherein the communication means is configured for adjusting power transmission parameters based on the power requirements and charging status of the portable device.
[009] In an embodiment, a system for wireless charging of a portable device, the system includes a plurality of primary coils, a receiver unit and a power supply circuit. The plurality of primary coils includes at least a first primary coil and a second primary coil that are independently capable of transmitting wireless power. The second primary coil is adjacent to the first primary coil. The receiver unit includes a receiver coil which is coupled to or incorporated into a portable device or battery, or a skin, case, or battery door associated therewith. The power supply circuit is configured to supply power to a power receiving device.
[0010] In an embodiment, A method for wirelessly charging a portable device using a charging base station, the method includes the step of generating an electromagnetic field at a charging base station for wireless power transmission. The method includes the step of receiving the wirelessly transmitted power at a portable device equipped with a wireless power receiver module. The method includes the step of communicating between the charging base station and the portable device using a communication means, the communication comprising adjusting power transmission parameters based on the power requirements and charging status of the portable device to optimize power transmission.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0011] The foregoing detailed description of embodiments is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the disclosure, there is shown in the present document example constructions of the disclosure; however, the disclosure is not limited to the specific system or method disclosed in the document and the drawings.
[0012] The present disclosure is described in detail with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer various features of the present subject matter.
[0013] Figure 1 illustrates a pad using multiple transmitter or charger coils in accordance with an embodiment.
[0014] Figure 2 illustrates a wireless charging protection circuit according to an embodiment of the present document.
[0015] Figure 3 illustrates an example wireless power transmission apparatus having multiple layers of primary coils arranged in an overlapping pattern according to some implementations.
[0016] In the above accompanying drawings, a non-underlined number relates to an item identified by a line linking the non-underlined number to the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.
[0017] Further, the figures depict various embodiments of the present subject matter for purposes of illustration only. One skilled in the art will readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the present subject matter described herein.
DETAILED DESCRIPTION
[0018] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. The words "comprising," "having," "containing," and "including," and other forms thereof, are intended to be equivalent in meaning and be open ended in that an item or items following any one of these words is not meant to be an exhaustive listing of such item or items, or meant to be limited to only the listed item or items. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. Although a system and method for wireless charging of a portable device, similar or equivalent to those described herein can be used in the practice or testing of embodiments of the present disclosure, the exemplary, a system and method for wireless charging of a portable device is now described.
[0019] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments. For example, although the present disclosure will be described in the context of a system and method for wireless charging of a portable device, one of ordinary skill in the art will readily recognize a system and method for wireless charging of a portable device can be utilized in any situation. Thus, the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein.
[0020] In an embodiment, a wireless charging system for a portable device is provided. The wireless charging system includes a charging base station configured to generate an electromagnetic field for wirelessly transmitting power. Further, the wireless charging system includes a portable device comprising a wireless power receiver module configured to receive power wirelessly from the charging base station, and a communication means facilitating communication between the charging base station and the portable device for optimizing power transmission, wherein the communication means is configured for adjusting power transmission parameters based on the power requirements and charging status of the portable device.
[0021] In an embodiment, a system for wireless charging of a portable device, the system includes a plurality of primary coils, a receiver unit and a power supply circuit. The plurality of primary coils includes at least a first primary coil and a second primary coil that are independently capable of transmitting wireless power. The second primary coil is adjacent to the first primary coil. The receiver unit includes a receiver coil which is coupled to or incorporated into a portable device or battery, or a skin, case, or battery door associated therewith. The power supply circuit is configured to supply power to a power receiving device.
[0022] In another implementation, the charging base station further includes a control circuitry and a power source. The control circuitry configured to adjust the power transmission parameters based on the communication with the portable device. The power source is configured to provide electrical power to the charging base station.
[0023] In another implementation, the portable device further includes a power management circuitry and a battery. The power management circuitry is configured to regulate the power received from the charging base station. The battery is configured to store the wirelessly transmitted power for later use.
[0024] In another implementation, the wireless power receiver module of the portable device further comprises a power management unit configured to control and optimize the charging process based on the communicated power transmission parameters.
[0025] In another implementation, the communication means employs a feedback loop for dynamically adjusting the electromagnetic field generated by the charging base station based on real-time measurements of the portable device's charging status.
[0026] In another implementation, communication means is further configured to exchange authentication signals between the charging base station and the portable device to ensure secure and authorized power transmission.
[0027] In an embodiment, A method for wirelessly charging a portable device using a charging base station, the method includes the step of generating an electromagnetic field at a charging base station for wireless power transmission. The method includes the step of receiving the wirelessly transmitted power at a portable device equipped with a wireless power receiver module. The method includes the step of communicating between the charging base station and the portable device using a communication means, the communication comprising adjusting power transmission parameters based on the power requirements and charging status of the portable device to optimize power transmission.
[0028] In another implementation, the method includes the step of adjusting power transmission parameters at the charging base station based on the communication with the portable device, and
[0029] In another implementation, the method includes the step of regulating the received power at the portable device using power management circuitry.
[0030] In another implementation, the method includes the step of receiving power wirelessly from the charging base station includes dynamically adjusting the charging rate by the power management unit of the wireless power receiver module based on the communicated power transmission parameters.
[0031] In another implementation, the method includes the step of exchanging authentication signals between the charging base station and the portable device via the communication means to establish secure and authorized power transmission.
[0032] Figure 1 illustrates a pad using multiple transmitter or charger coils in accordance with an embodiment.
[0033] In an embodiment, the mobile device or battery charger or power supply preferably has a substantially flat configuration, such as the configuration of a pad 100, and comprises multiple coils or sets of wires 104. These coils or wires can be the same size as or larger than the coils or wires in the mobile devices, or battery and can have similar or different shapes, including for example a spiral shape. The charger or power supply pad can be powered by plugging into a power source such as a wall socket or itself be powered or charged inductively. The pad can also be powered by another electronic device, such as the pad being powered through the USB outlet of a laptop or by the connector that laptops have at the bottom for interfacing with docking stations, or powering other devices.
[0034] A mobile device can include a receiver that includes one or more coils or wires to receive the power from the mobile device charger or power supply. he receiver can be connected to the power input jack of the mobile device or can bypass the input jack and be directly connected to the battery or charge management circuit inside the mobile device. In any of these configurations, the receiver includes one or more appropriate coil or wire geometries that can receive power from the mobile device charger or power supply when it is placed adjacent to the mobile device charger or power supply. The mobile device charger/power supply or pad, and the various mobile devices or batteries, can communicate with each other to transfer data. In one embodiment, the coils in the mobile device charger/power supply that are used for powering or charging the mobile device, or another set of coils in the same PCB layer or in a separate layer, can be used for data transfer between the mobile device charger/power supply and the mobile device to be charged or powered or the battery directly. Techniques employed in radio and network communication, such as radio frequency identification (RFID), Bluetooth, WiFi, Wireless USB, or others can be used. In one embodiment a chip connected to an antenna (for example, the receiver coil or separate data antenna) or another means of transfer of information can be used to provide information about, for example, the presence of the mobile device or battery, its authenticity (for example its manufacturer code) and the devices' charging/power requirements (such as its required voltage, battery capacity, and charge algorithm profile). Once a mobile device or battery is sensed near a primary coil or section of the mobile device or battery charger or power supply, the mobile device charger or power supply can then activate that primary coil or section to provide power to the receiver coil in the mobile device's battery, shell, receiver module, battery, or the device itself.
[0035] Inductive Charger Pad allows the operation of the mobile device or battery charger or power supply regardless of position of the mobile device or battery, the total area of the mobile device or battery charger or power supply can be covered by coils or by another wire geometry that creates magnetic field.
[0036] Figure 2 illustrates a wireless charging protection circuit according to an embodiment of the present document.
[0037] In an embodiment, a charging protection circuit may include a wireless charging base and a charging receiving circuit, wherein the charging receiving circuit may include first receiving coils which are configured to receive electromagnetic waves from the wireless charging base; a high-permeability magnetic core which is coupled to the first receiving coils and is configured to block electromagnetic waves opposite to the electromagnetic waves from the wireless charging base; a detection circuit which is coupled to the high-permeability magnetic core and is configured to detect whether the high-permeability magnetic core has failed; and a power supply circuit which is coupled to the high-permeability magnetic core and is configured to convert the electromagnetic energy generated by the electromagnetic waves into electric energy to supply power to a power receiving device. A detection circuit is added between a high-permeability magnetic core and a power receiving device in a charging receiving circuit to compare the electromagnetic waves received when the high-permeability magnetic core operates normally and the electromagnetic waves received when the high-permeability magnetic core has failed, so as to determine whether the high-permeability magnetic core has failed. the detection circuit may include: second receiving coils 240 which are configured to receive electromagnetic waves from the wireless charging base; a converter 242 which is coupled to the second receiving coils and configured to convert the electromagnetic energy generated by the electromagnetic waves received by the second receiving coils into an induction current; a first detection sensor 244 which is coupled to the converter and configured to detect the magnitude of the induction current; and a second comparator 246 which is coupled to the first detection sensor and configured to compare the detected induction current with a preset induction current threshold and determine that the high-permeability magnetic core has failed when the detected induction current is greater than the preset induction current threshold.
[0038] However, when the high-permeability magnetic core has failed or itself malfunctions, the magnetic flux induced by the detection circuit will increase, and an induction current will be generated on the detection circuit. An induction current threshold is preset, and it is determined that the high-permeability magnetic core has failed when the detected induction current is greater than the set threshold.
[0039] Figure 3 illustrates an example wireless power transmission apparatus having multiple layers of primary coils arranged in an overlapping pattern according to some implementations.
[0040] In an embodiment, the bottom 151, a number of local controllers 135 are shown, including a first local controller 131 and a second local controller 132. The local controllers do not necessarily need to be placed directly under their associated primary coil. However, for ease of illustration they are shown in the same configuration as their corresponding primary coils which are locate in a first layer 152 and a second layer 153. For example, the first primary coil 121 is shown on the first layer 152, along with several other primary coils. The second primary coil 122 is shown on the second layer 153 with other primary coils. A combined view 154 shows the coils overlapping with their corresponding local controllers in the center of each coil. The first wireless power receiving apparatus 210 may be a movable device (such as a computer mouse, or the like). The charging surface 155 may be a mouse pad, desktop, or the like, on which the movable device operates. A mouse is described as an example of a movable device for brevity in this disclosure. As the mouse moves about the charging surface 155, different primary controllers can charge the mouse. In an embodiment, the ferrite material may be used to evenly distribute the electromagnetic field. In some implementations, the shape of the coils, amount of overlap, and materials may be selected to improve efficiency, reduce dead zones, or both.
[0041] Although the description provides implementations of a system and method for wireless charging of a portable device, it is to be understood that the above descriptions are not necessarily limited to the specific features or methods or systems. Rather, the specific features and methods are disclosed as examples of implementations for a system and method for wireless charging of a portable device.
, Claims:We claim:
1. A wireless charging system for a portable device comprising:
a charging base station configured to generate an electromagnetic field for wirelessly transmitting power;
a portable device comprising a wireless power receiver module configured to receive power wirelessly from the charging base station, and
a communication means facilitating communication between the charging base station and the portable device for optimizing power transmission, and wherein the communication means is further configured for adjusting power transmission parameters based on the power requirements and charging status of the portable device.

2. The system as claimed in claim 1, wherein the charging base station further comprises:
a control circuitry configured to adjust the power transmission parameters based on the communication with the portable device, and
a power source configured to provide electrical power to the charging base station.

3. The system as claimed in claim 1 or 2, wherein the portable device further comprises:
a power management circuitry configured to regulate the power received from the charging base station, and
a battery configured to store the wirelessly transmitted power for later use.

4. The system as claimed in claims 1 to 3, wherein the wireless power receiver module of the portable device further comprises a power management unit configured to control and optimize the charging process based on the communicated power transmission parameters.

5. The system as claimed in claims 1 to 3, wherein the communication means employs a feedback loop for dynamically adjusting the electromagnetic field generated by the charging base station based on real-time measurements of the portable device's charging status.

6. The system as claimed in claim 5, wherein the communication means is further configured to exchange authentication signals between the charging base station and the portable device to ensure secure and authorized power transmission.

7. A method for wirelessly charging a portable device using a charging base station comprising:
generating an electromagnetic field at a charging base station for wireless power transmission;
receiving the wirelessly transmitted power at a portable device equipped with a wireless power receiver module, and
communicating between the charging base station and the portable device using a communication means, the communication comprising adjusting power transmission parameters based on the power requirements and charging status of the portable device to optimize power transmission.

8. The method as claimed in claim 7, further comprising:
adjusting power transmission parameters at the charging base station based on the communication with the portable device, and
regulating the received power at the portable device using power management circuitry.

9. The method as claimed in claim 7, wherein the step of receiving power wirelessly from the charging base station includes dynamically adjusting the charging rate by the power management unit of the wireless power receiver module based on the communicated power transmission parameters.

10. The method as claimed in claim 7, further comprising the step of exchanging authentication signals between the charging base station and the portable device via the communication means to establish secure and authorized power transmission.