Description:TECHNICAL FIELD
[0001] The present invention relates to the field of communications. More particularly, it relates to a system, methods, and apparatus for transferring of power to mobile devices and batteries by a wired charging path and/or a wireless charging path.
BACKGROUND
[0002] There is currently a need for powering portable or mobile devices for use in commercial, business, personal, consumer, and other applications. Examples of such devices include cellular telephones, personal digital assistants (PDAs), notebook computers, mobile email devices, Blackberry devices, Bluetooth headsets, hearing aids, music players (for example, MP3 players), radios, compact disk players, video game consoles, digital cameras, walkie-talkie or other communication devices, GPS devices, laptop computers, electric shavers, and electric toothbrushes.
[0003] As various portable electronic devices are used, batteries and battery charging methods affecting performance and usage time of the portable electronic devices have drawn interest. Accordingly, electronic devices equipped with wireless charging means, as well as wired charging means, have been provided, and attention has also been directed to an electronic device that provides both wired and wireless charging.
[0004] A battery operated electronic device, typically includes a charging circuit, and the electronic device is connected to a wired charging device, and a power supply path from the wired charging device is connected to the charging circuit of the electronic device to charge a battery of the electronic device. When the electronic device is connected with a wireless charging device, a power supply path from the wireless charging device is connected to the charging circuit of the electronic device, thereby charging the battery of the electronic device.
[0005] A charging circuit of an electronic device of the related art can be configured to receive a charging current from the wired charging device or the wireless charging device to charge a battery, but the electronic device is not able to provide power of the battery to the wired or wireless charging device. Also, existing wireless power transfer systems / chargers for portable devices rely mostly on Buck stage for power regulation and a half/full bridge topology for control of Transmitter coil and do not support additional wired USB Battery Charging / Power Delivery Port
.
[0006] In light of the above-stated discussion, it is the need for a single power transfer device for wired charging of portable devices along with wireless power transfer capabilities. Therefore, the present invention provides an integrated charging system for prioritizing a wired charging path and/or a wireless charging path to power the portable device.
[0007] Furthermore, other desirable features and characteristics of the present invention will become apparent from the subsequent detailed description and the appended claims, taken in conjunction with the accompanying drawings and the foregoing technical field and background.

OBJECT OF THE DISCLOSURE
[0008] A primary objective of the present disclosure is to provide an integrated charging system for prioritizing a wired charging path and/or a wireless charging path to power the portable device in an electric vehicle environment.
[0009] Another objective is to provide a charging device for prioritizing the wired charging path and/or the wireless charging path to power the portable device in the electric vehicle environment.
SUMMARY
[0010] An embodiment of the present invention relates to an integrated charging system for prioritizing a wired charging path and/or a wireless charging path to power a portable device in an electric vehicle environment comprising a power source configured with a transmitter module for generating and supplying power for charging, the transmitter module for transmitting a current supplied by the power source, and a receiver module incorporated into the portable device, a skin, a case, a battery, a door associated therewith. In particular, the receiver module receives power transmitted by a prioritized charging path to charge or power the portable device. Further, a wireless connection receives wireless charging power to charge the portable device along the wireless charging path and a wired connection receives a wired charging power to charge the portable device along the wired charging path.
[0011] In accordance with an embodiment of the present invention, the transmitter module comprises a transmitter coil power bridge to convert a DC voltage supplied by the power source to an AC voltage, a transmitter coil for transferring power to a receiver module through Electromagnetic Induction, a buck boost power converter for providing an output power for any given charging voltage, a controller automatically detecting whether any cable is connected to a USB BC/PD port to prioritize anyone of the wired charging path and/or the wireless charging path and a communication channel for establishing a wireless communication or a wired communication with the power portable device. The transmitter module is also configured with a charge cut-off time for charging the portable device.
[0012] In accordance with an embodiment of the present invention, the DC buck-boost power converter works in a buck mode, boost mode and/or a buck-boost mode. Particularly, in the boost mode the charging voltage exceeds input voltage. And, in the buck-mode charging voltage is less than input voltage. Further, the buck-boost power converter is operably configured to the USB BC/PD port for establishing the wired connection.
[0013] In accordance with an embodiment of the present invention, the integrated charging system also comprises a plurality of thermistors configured to cut-off power supply at high temperatures.
[0014] In accordance with an embodiment of the present invention, the integrated charging system is a combination of a wired charging system and a wireless charging system.
[0015] In accordance with an embodiment of the present invention, the integrated charging system charges the portable devices in parallel by a combined charging path. In particular, the combined charging path is a combination of the wired charging path and the wireless charging path.
[0016] In accordance with an embodiment of the present invention, the integrated charging system uses a BPP (Basic Power Profile) mode or an EPP (Extended Power Profile) mode for wireless charging.
[0017] In accordance with an embodiment of the present invention, the integrated charging system uses a USB Type C Connection, USB Type A Connection for wired charging.
[0018] Another embodiment relates to a charging device for prioritizing a wired charging path and/or a wireless charging path to power portable device in an electric vehicle environment.
[0019] In accordance with an embodiment of the present invention, the portable devices includes anyone of a laptop computer, a user computer, a tablet computer, a personal digital assistant (PDA), a cellular telephone, a communication network appliance, a camera, a smartphone, an enhanced general packet radio service (EGPRS) mobile phone, a media player, a navigation device, an email device, a game console, a combination of data processing devices, a wearable electronics including a smart watches, smart patches, smart clothing, and smart helmets, fitness trackers, VR headsets, smart jewellery, web-enabled glasses and Bluetooth headsets, a USB connector, or any wireless portable devices.
[0020] These and other aspects herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawing. It should be understood, however, that the following descriptions are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the invention herein without departing from the spirit thereof.
BRIEF DESCRIPTION OF FIGURE
[0021] Having thus described the disclosure in general terms, reference will now be made to the accompanying figure, wherein
[0022] Fig. 1 is a block diagram illustrating various components of an integrated charging system for use within a vehicle in accordance with an embodiment of the invention;
[0023] Fig. 2A is a pictorial snapshot illustrating a charging device for a wired charging path and/or a wireless charging path to power at least one portable device in an electric vehicle environment;
[0024] Fig. 2B is a pictorial snapshot illustrating a location of a charging device and a portable device in an electric vehicle environment in accordance with an embodiment of the present invention;
[0025] Fig. 3 is pictorial snapshot illustrating schematic representation of the integrated charging system in accordance with an embodiment of the present invention.
[0026] It should be noted that the accompanying figure is intended to present illustrations of a few examples of the present disclosure. The figure is not intended to limit the scope of the present disclosure. It should also be noted that the accompanying figure is not necessarily drawn to scale.
DETAILED DESCRIPTION
[0027] In the following detailed description of the invention, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be obvious to a person skilled in the art that the invention may be practiced with or without these specific details. In other instances, well known methods, procedures and components have not been described in detail so as not to unnecessarily obscure aspects of the invention. Furthermore, it will be clear that the invention is not limited to these alternatives only. Numerous modifications, changes, variations, substitutions and equivalents will be apparent to those skilled in the art, without parting from the scope of the invention.
[0028] The accompanying drawing is used to help easily understand various technical features and it should be understood that the alternatives presented herein are not limited by the accompanying drawing. As such, the present disclosure should be construed to extend to any alterations, equivalents and substitutes in addition to those which are particularly set out in the accompanying drawing. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are generally only used to distinguish one element from another.
[0029] Conditional language used herein, such as, among others, "can," "may," "might," "may," “e.g.,” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain alternatives include, while other alternatives do not include, certain features, elements and/or steps. Thus, such conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more alternatives or that one or more alternatives necessarily include logic for deciding, with or without other input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular alternative. The terms “comprising,” “including,” “having,” and the like are synonymous and are used inclusively, in an open-ended fashion, and do not exclude additional elements, features, acts, operations, and so forth. Also, the term “or” is used in its inclusive sense (and not in its exclusive sense) so that when used, for example, to connect a list of elements, the term “or” means one, some, or all of the elements in the list.
[0030] Fig. 1 is a block diagram illustrating various components of an integrated charging system 100 in accordance with an embodiment of the invention. The integrated charging system 100 prioritizes a wired charging path and/or a wireless charging path to power a portable device in an electric vehicle environment . The integrated charging system 100 includes a power source 105 configured with a transmitter module 110 for generating and supplying power for charging, the transmitter module 110 for transmitting a current supplied by the power source 105, and a receiver module 125 to receive power for charging the portable device and a communication channel 120 for establishing a wireless communication or a wired communication with the power portable device. In particular, a wireless connection receives a wireless charging power to charge the portable device along the wireless charging path and a wired connection receives a wired charging power to charge the portable device along the wired charging path.
[0031] The transmitter module 110 further includes a transmitter coil power bridge 112 to convert a DC voltage supplied by a buck - boost power controller 116 to an AC voltage, a transmitter coil 114 for transferring power to a receiver module 125 through Electromagnetic Induction , the buck- boost power converter 116 for providing an output power for any given charging voltage and a controller 118 automatically detecting whether any cable or portable device is connected to a USB BC/PD port to prioritize anyone of the wired charging path and/or the wireless charging path. In particular, the buck- boost power converter 116 regulates DC Power to a Tx-Coil Power bridge 112 which converts the DC voltage to the AC voltage for transfer of power can be transferred to the receiver module 125 via the transmitter Coil 114. Moreover, the buck – boost power converter 116 also provides required power output to a USB BC/PD connector 132 to be used for portable device battery charging.
[0032] In accordance with an embodiment of the present invention, the transmitter module 110 is configured to establish wired and wireless charging connections.
[0033] In accordance with an embodiment of the present invention, the transmitter module 110 prioritises on either wireless or wired charging path based on the decision through controller.
[0034] In accordance with an embodiment of the present invention, the transmitter module 110 is configured to provide wired and wireless charging.
[0035] In accordance with an embodiment of the present invention, the transmitter module 110 measures currents both at input and at the output of the buck- boost power converter 116 with the help of current sense resistors. Moreover, the transmitter module 110 provides constant current and/or constant voltage supply along with over current and short circuit protections at both the wireless power transfer stage and the USB BC Port. Further, the transmitter module 110 also provides for overvoltage protection at the input stage, the output stage and at the USB BC/PDPort.
[0036] In accordance with an embodiment of the present invention, the transmitter module 110 contains all requisite protections like over current, short circuit, over temperature, over voltage, Fuse, ESD, EFT, etc,. that may be recoverable depending on the fault and timing.
[0037] In accordance with an embodiment of the present invention, the transmitter module 110 provides power to the USB BC/PD port only after detection of cable and/or portable device.
[0038] In an exemplary embodiment of the present invention, the USB BC/PD Port for charging may support BC 1.2 Dedicated Charging Port (DCP) Standard where the Output voltage is regulated at 5 VDC and maximum current is drawn upto 1.5A and 3A. The port can also support USB Type-C PD standard where the Output Voltage is regulated at 5V (1.5A,3A) and 9V (1.67A to 3A) and as per the negotiation from Portable Device via DP and DM Pins.
[0039] In another exemplary configuration, the DCP Port may not support any communication where D+ and D- pins are shorted together by less than 200 ohms resistor. The portable device detects whether it is DCP port by applying some voltage on D+ and checking the voltage on D- , if D+ and D- Voltages are same then the Portable device concludes that it is DCP Port and it will not take more than 1.5/3A of current.
[0040] In yet exemplary another configuration the port communicates with the portable device through D+ and D- on USB type C protocol. Further, CC Pins (CC1 and CC2) can be used to discover and configure VBUS: USB Type-C current modes or USB power delivery.
[0041] Table 1 is a tabular representation showing requirements of the BC 1.2 DCP port configuration -

[0042] Further, the USB BC/PD Port on the transmitter module 110 provides requisite immunity against electrostatic discharge and electrical fast transients.
[0043] The transmitter module 110 may be configured with a time charge cut-off algorithm to disconnect charging of the portable devices.
[0044] The receiver module 125 is incorporated into the portable device, a skin, a case, a battery, a door associated therewith. The receiver module 125 includes a receiver coil 136 , a receiver controller 137 and a receiver communication channel 139. Further, the receiver communication channel 139 and a transmitter communication channel 120 establishes the wireless communication or the wired communication with the portable device.
[0045] In accordance with an embodiment of the present invention, the integrated charging system 100 also comprises a plurality of thermistors configured to cut-off power supply at high temperatures.
[0046] In accordance with an embodiment of the present invention, the integrated charging system 100 is a combination of a wired charging system and a wireless charging system.
[0047] In accordance with an embodiment of the present invention, the integrated charging system 100 charges the portable devices in parallel by a combined charging path. In particular, the combined charging path is a combination of wired charging path and the wireless charging path.
[0048] In accordance with an embodiment of the present invention, the wireless charging path follows a wireless Protocols selected from an Amplitude Shift Keying Protocols or a Frequency Shift Keying Protocols, a Wireless Power Consortium protocol, a Power Matters Alliance protocol, an Alliance for Wireless Power protocol.
[0049] In accordance with an embodiment of the present invention, the integrated charging system is configured to charge rechargeable batteries and battery-operated devices.
[0050] Fig. 2A is a pictorial snapshot illustrating a charging device for a wired charging path and/or a wireless charging path to power at least one portable device in an electric vehicle environment. The charging device includes the power source 105 configured with the transmitter module 110 for generating and supplying power for charging, the transmitter module 110 for transmitting a current supplied by the power source, the transmitter coil 114 for transferring power to a receiver module through Electromagnetic Induction, a USB BC/PD port 140 protected inside a cover 145, a front case 150 and a back case 160. Further, the charging device includes the receiver module 125 to receive power for charging the portable device and the receiver communication channel 139 and the transmitter communication channel 120 for establishing a wireless communication or a wired communication with the receiver module 125/ power portable device. The wireless connection receives wireless charging power to charge the portable device along the wireless charging path and a wired connection receives a wired charging power to charge the portable device along the wired charging path.
[0051] Fig. 2B is a pictorial snapshot illustrating a location of a charging device and a portable device in an electric vehicle environment in accordance with an embodiment of the present invention. The portable device is a smart helmet.
[0052] Examples of the portable device according to various embodiments of the present disclosure may include at least one of a smart helmet, a smartphone, a tablet personal computer (PC), a mobile phone, a video phone, an e-book reader, a desktop PC, a laptop computer, a netbook computer, a workstation, a personal digital assistant (PDA), a portable multimedia player (PMP), a Moving Picture Experts Group phase 1 or phase 2 (MPEG-1 or MPEG-2) audio layer 3 (MP3) player, a mobile medical device, a camera, or a wearable device. According to an embodiment of the present disclosure, the wearable device may include at least one of an accessory-type device (e.g., a watch, a ring, a bracelet, an anklet, a necklace, glasses, contact lenses, or a head-mounted device (HMD)), a fabric- or clothes-integrated device (e.g., electronic clothes), a body attaching-type device (e.g., a skin pad or tattoo), or a body implantable device (e.g., an implantable circuit).
[0053] According to an embodiment of the present disclosure, the portable device is an electronic home appliance such as a television (TV), a digital versatile disc (DVD) player, an audio player, a refrigerator, an air conditioner, a cleaner, an oven, a microwave oven, a washer, a drier, an air cleaner, a set-top box, a home automation control panel, a security control panel, a TV box (e.g., Samsung HomeSync™, Apple TV™, or Google TV™), a gaming console (Xbox™, PlayStation™), an electronic dictionary, an electronic key, a camcorder, or an electronic picture frame.
[0054] According to various embodiments of the disclosure, examples of the portable device may at least one of part of a piece of furniture or building/structure, an electronic board, an electronic signature receiving device, a projector, or various measurement devices (e.g., devices for measuring water, electricity, gas, or electromagnetic waves). According to an embodiment of the present disclosure, the portable device may be one or a combination of the above-listed devices.
[0055] According to an embodiment of the present disclosure, the portable device may be a flexible electronic device. The portable device disclosed herein is not limited to the above-listed devices, and may include new electronic devices depending on the development of technology.
[0056] Fig. 3 is pictorial snapshot illustrating schematic representation of the integrated charging system in accordance with an embodiment of the present invention. The integrated charging system 100 uses a BPP (Basic Power Profile ) mode or an EPP (Extended Power Profile) mode for wireless charging. In the BPP (Basic Power Profile ) mode and an EPP (Extended Power Profile) mode a USB Type C Cable with or without a Portable Device is not connected to the integrated charging system and the mode of operation is normally set as wireless charging mode. During this mode of operation Switch Q9 is turned off and wireless power transfer full bridge switches Q5 & Q8 along with switches Q7 & Q6 are operated close to 50% duty cycle with 180 degree phase shift between the pair. These WPT switches are operated either with fixed or variable switching frequency as required by system gain requirements. The bus voltage to the WPT bridge stage shall also be controlled through the buck boost converter, whenever required.
[0057] In accordance with an embodiment of the present invention, the buck-boost power converter 116 works in a buck mode, boost mode and/or a buck-boost mode. Particularly, in the boost mode the charging voltage exceeds input voltage. And, in the buckmode charging voltage is less than input voltage. Further, the buck-boost power converter is operably configured to the USB BC/PD port for establishing the wired connection.
[0058] During buck mode operation switch Q3 is permanently on and the Q4 is permanently off, voltage regulation is achieved via PWM on Q1 Switch and inverted PWM on Q2 serving as synchronous rectifier along with intrinsic body diode operation of Q2. During Boost mode operation switch Q1 is permanently on and the Q2 is permanently off, voltage regulation is achieved via PWM on Q4 Switch and inverted PWM on Q3 serving as synchronous rectifier along with intrinsic body operation diode of Q3.
[0059] Further, integrated charging system 100 used a USB connection for establishing wired charging. In particular, when the USB Type C Cable with or without the Portable Device is connected to the system, the mode of operation set by the system is wired charging mode. During this mode of operation WPT switches Q5, Q6, Q6 and Q7 are inactive and are turned off. The bus voltage to the USB-C VBUS shall be controlled through the buck boost converter.
[0060] During buck mode operation switch Q3 is permanently on and the Q4 is permanently off, Voltage regulation is achieved via PWM on Q1 Switch and inverted PWM on Q2 serving as synchronous rectifier along with intrinsic body diode operation of Q2.
[0061] During Boost mode operation switch Q1 is permanently on and the Q2 is permanently off, Voltage regulation is achieved via PWM on Q4 Switch and inverted PWM on Q3 serving as synchronous rectifier along with intrinsic body diode operation of Q3. During this mode of operation the USB-C port Data lines D+ and D- are configured to either provide a low impedance short between D+ and D- and/or provide for USB-C communication for other battery charging power capabilities as required by USB Type-C power delivery protocols. Switch Q9 is enables post handshake for power delivery to the USB Port.
[0062] Further, the integrated charging system 100 performs auto detection of portable device when connected to USB port. The USB connection is any of a USB Type C Connection, USB Type A Connection for wired charging.
[0063] In a USB Type C Connector (Having separate GND Pins) the USB Type C cable with or without the portable device is connected to the receptacle all GND pins gets shorted together on the Plug side. Initially before connector engagement 3 internal at the receptacle are connected together on the PCB. The 4th Ground Pin is pulled up via a pull-up resistor and is connected to a GPIO Pin of the MCU and when the cable is inserted the GPIO is connected to down to ground potential and is sensed by the MCU which is input confirming connection of a plug to the USB Port. Power stage for USB BC port is enabled only after the aforementioned operation is complete.
[0064] In the USB Type C Connector having separate Vbus pins isolated the USB Type C cable with portable device is connected to the receptacle all the pins gets shorted together. Initially the 3 internal pins at the receptacle side is shorted on the PCB and connected to a fixed voltage source at the Input side and the 4th pin that is used for detection is pulled to ground with a resistor of known impedance, whenever the cable is connected to the receptacle this pin goes high or experiences a change in potential, this change is sensed by the Microcontroller. The controller takes the decision on enabling power to the USB BC port pins.
[0065] In USB Type C / Type A Connector, a USB Type C / Type Cable/ a CC pin with the portable device is connected to the receptacle the voltage on D+ and D- measures through internal circuitry of the transmitter module 110. The transmitter 110 communicates on D+ and D- via USB communication protocol if required for a handshake. The power may be enabled on the connector post handshake through switch S9 (shown in Fig. 3). It may be noted the handshake may be done as per Portable device manufacturers’ recommendation and other recommendations under USB-IF.
[0066] Further, the integrated charging system 100 also auto detects a wireless power transfer enabled portable devices in alternate embodiments.
[0067] While the detailed description has shown, described, and pointed out novel features as applied to various alternatives, it can be understood that various omissions, substitutions, and changes in the form and details of the devices or algorithms illustrated can be made without departing from the scope of the disclosure. As can be recognized, certain alternatives described herein can be embodied within a form that does not provide all of the features and benefits set forth herein, as some features can be used or practiced separately from others.
[0068] The disclosures and the description herein are intended to be illustrative and are not in any sense limiting the invention, defined in scope by the following claims.
, Claims:We Claim,
1. An integrated charging system for sensing and prioritizing a wired charging path and/or a wireless charging path to power at least one portable device in an electric vehicle environment comprising:
a power source configured with a transmitter module for generating and supplying power for charging ;
the transmitter module for transmitting a current supplied by the power source, the transmitter module comprises:
a transmitter coil power bridge to convert a DC voltage supplied by the power source to an AC voltage;
a transmitter coil for transferring power to a receiver module through Electromagnetic Induction;
a buck-boost power converter for providing an output signal for any given charging voltage;
a controller automatically detecting whether any cable/or portable device is connected to a USB BC/PD port to prioritize anyone of the wired charging path and/or the wireless charging path;
a communication channel for establishing a wireless communication or a wired communication with the at least one power portable device;
the receiver module incorporated into the at least one portable device, a skin, a case, a battery, a door associated therewith, wherein the receiver module receives power transmitted by a prioritized charging path to charge or power the at least one portable device;
wherein a wireless connection receives wireless charging power to charge the at least one portable device along the wireless charging path and a wired connection receives a wired charging power to charge the at least one portable device along the wired charging path.
2. The integrated charging system as claimed in claim 1, wherein the buck-boost power converter works in a buck mode, a boost mode and/or a buck-boost mode.
3. The integrated charging system as claimed in claim 2, wherein in the boost mode the charging voltage exceeds input voltage.
4. The integrated charging system as claimed in claim 2, wherein in the buck mode charging voltage is less than input voltage.
5. The integrated charging system as claimed in claim 1, wherein the buck-boost power converter is operably configured to the USB BC/PD port for establishing the wired connection.
6. The integrated charging system as claimed in claim 1, wherein the integrated charging system also comprises a plurality of thermistors configured to cut-off power supply at high temperatures.
7. The integrated charging system as claimed in claim 1, wherein the integrated charging system is a combination of a wired charging system and an wireless charging system.
8. The integrated charging system as claimed in claim 1, wherein the integrated charging system charges the portable devices in parallel by a combined charging path.
9. The integrated charging system as claimed in claim 8, wherein the combined charging path is a combination of wired charging path and the wireless charging path.
10. The integrated charging system as claimed in claim 1, wherein the integrated charging system uses a BPP (Basic Power Profile ) mode or an EPP (Extended Power Profile) mode for wireless charging.
11. The integrated charging system as claimed in claim 1, wherein the integrated charging system uses a USB Type C Connection , USB Type A Connection for wired charging.
12. The integrated charging system as claimed in claim 1, wherein the transmitter module is configured with a charge cut-off time for charging the at least one portable device.
13. A charging device for sensing and prioritizing a wired charging path and/or a wireless charging path to power at least one portable device in an electric vehicle environment comprising:
a power source configured with a transmitter module for generating and supplying power for charging ;
the transmitter module for transmitting a current supplied by the power source, the transmitter module comprises:
a transmitter coil power bridge to convert a DC voltage supplied by the power source to an AC voltage;
a transmitter coil for transferring power to a receiver module through Electromagnetic Induction;
a buck -boost power converter for providing an output signal for any given charging voltage;
a controller automatically detecting whether any cable or portable device is connected to a USB BC/PD port to prioritize anyone of the wired charging path and/or the wireless charging path;
a communication channel for establishing a wireless communication or a wired communication with the at least one power portable device;
the receiver module incorporated into the at least one portable device, a skin, a case, a battery, a door associated therewith, wherein the receiver module receives power transmitted by a prioritized charging path to charge or power the at least one portable device;
wherein a wireless connection receives wireless charging power to charge the at least one portable device along the wireless charging path and a wired connection receives a wired charging power to charge the at least one portable device along the wired charging path.
14. The charging device as claimed in claim 13, wherein the buck boost power converter works in a buck mode, a boost mode and/or a buck-boost mode.
15. The charging device as claimed in claim 14, wherein, in the boost mode the charging voltage exceeds input voltage.
16. The charging device as claimed in claim 14, wherein, in the buck mode charging voltage is less than input voltage.
17. The charging device as claimed in claim 14, wherein the buck-boost power converter is operably configured to the USB BC/PD port for establishing the wired connection.
18. The charging device as claimed in claim 13, wherein the charging device also comprises a plurality of thermistors configured to cut-off power supply at high temperatures.
19. The charging device as claimed in claim 13, wherein the charging device is a combination of a wired charging system and an wireless charging system.
20. The charging device as claimed in claim 13 wherein the charging device charges the portable devices in parallel by a combined charging path.
21. The charging device as claimed in claim 13, wherein the combined charging path is a combination of wired charging path and the wireless charging path.
22. The charging device as claimed in claim 13, wherein the charging device uses a BPP (Basic Power Profile ) mode or an EPP (Extended Power Profile) mode for wireless charging.
23. The charging device as claimed in claim 13, wherein the charging device uses a USB Type C Connection , USB Type A Connection for wired charging.
24. The charging device as claimed in claim 13, wherein the transmitter module is configured with a charge cut-off time for charging the at least one portable device.