KR101462992B1 - Wireless power transmission system for multi-device charging - Google Patents

Abstract

A multi-node wireless power transmission system comprising a wireless power transmission device and a plurality of wireless charging devices spaced apart from the wireless power transmission device, wherein when the wireless charging device is located in a semi-charging zone where communication is possible, Determining whether the wireless charging device is a target of a wireless power transmission service based on an ID received from the wireless charging device, and when the wireless charging device is located in a charging zone capable of both communication and wireless power transmission, Wherein the wireless power transmission service can be provided in a simultaneous power transmission mode or a time sharing power transmission mode.

Description

Technical Field [0001] The present invention relates to a wireless power transmission system for multi-

The present invention relates to a system for wirelessly transmitting power to a plurality of devices requiring charging based on self-resonant wireless power transmission technology.

A wireless charging system using a magnetic induction phenomenon is being used as a wireless power transmission technology for transferring energy wirelessly.

For example, an electric toothbrush or a wireless shaver is charged with the principle of electromagnetic induction, and recently, wireless charging products capable of charging a portable device such as a mobile phone, a PDA, an MP3 player, and a notebook computer by using electromagnetic induction have been introduced .

However, the magnetic induction method of inducing a current from one coil to another through a magnetic field is very sensitive to the distance between the coils and the relative position thereof, so that the transmission efficiency is rapidly deteriorated even if the distance between the two coils is slightly decreased or turned. Accordingly, such a magnetic induction type charging system has a weak point that it can be used only at a short distance of a few cm or less.

On the other hand, U.S. Patent No. 7,741,735 discloses a non-radiation energy transfer method based on attenuation wave coupling of a resonance field. This is because the resonator with two identical frequencies has a tendency to be coupled to each other without affecting other surrounding non-resonators, and this technique has been introduced as a technology capable of transmitting energy to a far distance as compared with the conventional electromagnetic induction .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless power transmission system having an interface for controlling wireless power transmission to multiple devices.

In order to solve such problems, the present invention defines requirements of an interface for controlling wireless power transmission to a plurality of devices, and provides protocols and procedures of a control interface.

That is, a charging method of a multiple-device wireless charging system according to an aspect of the present invention is a charging method of a multiple-device wireless charging system including a plurality of wireless charging apparatuses including a wireless power transmission apparatus and a wireless power transmission apparatus, Wherein the wireless power transmission device transmits a first test power to the plurality of wireless charging devices and detects a current and a voltage of the wireless power transmission device in accordance with the test power to perform a first impedance matching ; Performing the second impedance matching based on the received power information received from each of the plurality of wireless charging devices, and transmitting the second test power to the plurality of wireless charging devices; And transmitting power to the plurality of wireless chargers simultaneously based on the second impedance matching result.

Further comprising changing the frequency to a wireless power transmission frequency obtained from the wireless charging device information received from at least one of the plurality of wireless charging devices before performing the first impedance matching .

In the step of performing the second impedance matching, the wireless power transmission apparatus may transmit the second test power to the plurality of wireless charging apparatuses and then request the reception power information to the plurality of wireless charging apparatuses, The apparatus may calculate the wireless power transmission efficiency of each of the plurality of wireless charging devices based on the reception power information after receiving the reception power information from each of the plurality of wireless charging devices.

The wireless power transmission apparatus may further include a step of notifying each of the plurality of wireless charging apparatuses of the end of the wireless power transmission when charging is terminated after the step of transmitting the power at the same time, Each of the plurality of wireless charging devices may turn off the power antenna.

According to the present invention, the requirements of the interface for controlling the wireless power transmission to multiple devices are defined, and the protocols and procedures of the control interface are provided so that the multi-device wireless power transmission system can be properly operated.

Figure 1 shows a wireless power transmission overview.
2 shows an overview of a wireless power transmission service.
Figure 3 illustrates the physical / spatial components of a wireless power transmission system in accordance with an embodiment of the present invention.
4 shows a general procedure of time division based wireless power transmission according to an embodiment of the present invention.
5 is a block diagram of a wireless power transmission system according to an embodiment of the present invention.
Figure 6 shows the results of Table 1 -
Figure 7 is a table 2 - Field Descriptions Summary
FIG. 8 is a table showing the frame type value
Figure 9 is a table 4 - request frame
Figure 10 shows the results of Table 5 -
FIG. 11 shows a table 6 -
FIG. 12 shows an example of a reception notification frame
Figure 13 is a table showing the request frame payload format
Figure 14 is a graphical representation of Table 9 - request code and data
Figure 15 is a table showing the response frame payload format
Figure 16 is a table showing the response codes and data
FIG. 17 is a block diagram of the data frame
Figure 18 shows the data codes and blocks
FIG. 19 is a table showing the reception notification frame
Figure 20 shows the power receiver recognition / authentication and charging zone / communication zone
Figure 21 is a graphical representation of the < RTI ID =
Figure 22 shows the time-division power transfer
Figure 23 shows the removal of debris
Figure 24 shows the appearance of the new power receiver and the disappearance of the conventional power receiver.
Fig. 25 is a block diagram of the conventional power receiver buffer
Figure 26 shows the power transfer end
Fig. 27 is a graph showing the power transmission
FIG. 28 is a graph showing changes in battery discharge rate

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Hereinafter, a wireless power transmission system for wireless charging of multiple devices according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the present invention defines an interface for system management that transmits power to a plurality of devices requiring charging based on self-resonant wireless power transmission technology within a few meters.

In the present invention, various types of frequency bands from low frequency (50 kHz) to high frequency (15 MHz) are selectively used for wireless power transmission, and it is necessary to support a communication system capable of exchanging data and control signals for system control .

INDUSTRIAL APPLICABILITY The present invention can be applied to various industrial fields such as a mobile terminal industry using a battery, an electronic appliance using it, a household appliance industry, an electric automobile industry, a medical device industry, and a robot industry.

The present invention contemplates a system capable of transmitting power to one or more multiple devices using a single transmit coil provided with the device.

The terms and abbreviations used in the present invention are as follows.

Wireless power transmission system (Multi-device Wireless Charging System) : to provide a wireless power transmission system in the magnetic field region

Power transmitter (Multi-device Wireless Charging System- Charger): provides a wireless power transmission to the power receiver in a multiple device within the magnetic field zone, and apparatus for managing the entire system

Power receiver (Multi-device Wireless Charging System- Deivce): apparatus that receives a wireless power transmission from the power transmitter in the magnetic field region

Charging area (Charging Zone): an area made an actual wireless power transmission within the magnetic field region, can vary depending upon the size, power requirements, the operating frequency of the application.

Communication areas (Communication Zone): an area for managing a wireless power transmission for the power receiving device within the magnetic field region, wider than the charging area.

MWCS: Multi-device Wireless Charging System

MWCS-C: Multi-device Wireless Charging System-Charger

MWCS-D: Multi-device Wireless Charging System-Deivce

5 Overview

Wireless power transmission is a system for efficiently supplying power wirelessly to multiple power receivers, consisting of one power transmitter and one or more power receivers. In order to efficiently transmit and control power to a plurality of power receivers, an interface capable of managing a complicated wireless power transmission network compared to a 1: 1 wireless power transmission is indispensable. ID recognition, authentication, etc., to determine the current wireless power transmission status based on the exchanged power transmission information, and then selects a power transmission mode that can provide the highest efficiency to each power receiver, and suddenly disappears or emerges Procedures and interfaces for the control and management of unexpected situations, such as responses to receivers, must be accompanied.

Figure 1 shows a wireless power transmission overview.

This technology can be applied to the following industrial fields that use batteries or use electronic devices that require them.

- Mobile terminal industry: Providing charging service to mobile terminal anytime and anywhere

- Household appliance industry: simplify wiring and autonomy of furniture layout while eliminating the complexity and inconvenience of wired lines in the home

- Electric vehicle industry: Avoid the danger of high-voltage charging and provide efficient and convenient charging based on a single standard

- Medical device industry: Provide patients with stable and versatile portable devices

2 shows an overview of a wireless power transmission service.

To provide wireless power transmission to multiple devices, the power transmitter performs wireless power transmission with time-division-based scheduling and also manages the joining, disconnecting, and releasing of power receivers for wireless power transmission environment control.

Provides power transmission function from several W to several hundred watts depending on the type of power receiver, including contact, within a few meters within a short distance and guarantees more than 70% efficiency over the required wireless power transmission distance of each power receiver Should be.

Various frequency bands can be selected and used for efficient wireless power transmission and interoperability.

A wireless communication system capable of exchanging power transmission information and control signals is needed to efficiently provide wireless power transmission service to a plurality of devices. Of the possible communication methods, wireless power transmission using in-band magnetic field communication to exchange information and control signals uses the same frequency as wireless power transmission in the magnetic field area for wireless communication to increase the efficiency of frequency use.

Wireless power transmission is divided into physical components, spatial components and temporal components. The physical components are composed of a power transmitter and a power receiver. The spatial component is composed of a charging zone and a communication zone. The temporal component means a time unit based on a time division method for wireless power transmission to multiple devices.

The physical components that make up the wireless power transmission are the power transmitter and power receiver in a star topology centered on the power transmitter. A wireless power transmission network is a network capable of data communication and wireless power transmission with respective power receivers around a power transmitter. The power transmitter manages the entire wireless power transmission network and there is only one in the network. See Figure 3 for an illustration of the physical components.

In order to manage effective power receivers, a basic preparatory procedure for wireless power transmission must be preceded by recognizing and authenticating power receivers in advance in a communicable area and exchanging data necessary for wireless power transmission. Therefore, there is a virtual space divided into a charging zone and a communication zone, and the power transmitter starts to manage power receivers in the communication zone, which is a communicable zone, and electric power belonging to the charging zone And performs actual wireless power transmission to the receivers. In the case of wireless power transmission using in-band magnetic field communication, spatial charging zones and communication zones can be efficiently formed because of the magnetic field characteristics that can not exist to a long distance. However, when using other communication methods, The number of power receivers to be considered can increase rapidly. To prevent this, it may be necessary to adjust the output power of other communication methods in the power transmitter.

Figure 3 illustrates the physical / spatial components of a wireless power transmission system in accordance with an embodiment of the present invention.

The wireless power transmission network uses a time division multiple access (TDMA) scheme, which is managed by a power transmitter and distributed by the power receiver's request and the power transmitter's judgment. In addition, various procedures such as recognition, authentication, analysis, and provision of wireless power transmission for providing wireless power transmission to a plurality of devices are performed on a time division basis.

4 shows a general procedure of time division based wireless power transmission according to an embodiment of the present invention.

6 Network Components

6.1 General

In order to perform a wireless power transmission to a plurality of power receivers, a power receiver recognition / authentication procedure for determining whether the power receiver recognized by the power transmitter is a device suitable for providing a wireless power transmission service is a priority.

In order to quickly provide wireless power transmission to a plurality of power receivers, it is generally necessary that the power receiver is capable of receiving a wireless power transmission service, but in the case of being in a communication zone capable of wireless communication, Data is exchanged to complete wireless power transmission preparation. When the ready-made power receiver enters the charging zone, the wireless power transmission is performed to save the preparation time for the wireless power transmission to provide quick service.

In order to efficiently provide the wireless power transmission service, the wireless power transmission mode is simultaneously performed to all the devices in the charging zone according to the situation, and the priority is set based on the remaining capacity of the battery or the user selection basis. There is a time division power transfer mode for performing power transmission.

When all of the power receivers are full, the power transmission may be terminated or the user may arbitrarily stop the currently provided power transmission service.

There are frequent and varying incidents that must be considered for wireless power transmission to multiple power receivers. In order to efficiently cope with this problem, when an unexpected situation occurs on the network during the wireless power transmission, the power transmitter recognizes this and stops the wireless power transmission service until the unexpected situation is processed, thereby informing the user of the unexpected situation.

6.2 Power receiver recognition / authentication

The power transmitter periodically transmits a join request signal and the power receivers receiving this signal transmit their ID in response. The power transmitter determines whether the corresponding power receivers are the target of the wireless power transmission service based on the received ID, and requests information about the wireless power transmission to the corresponding power receiver if the target is the service target. And informs the non-service power receiver that it can not provide the service.

6.3 Wireless Power Transmission Mode

The wireless power transmission mode largely consists of a simultaneous power transmission mode and a time sharing power transmission mode. In all modes, the power transmitter grasps the charge status (battery residual amount, battery discharge rate, received power level, voltage / current sensing information, etc.) received from the power receivers through current / voltage sensing and communication, Performs charging frequency band selection, impedance matching, output power level adjustment, and the like to provide a power transmission service

6.3.1 Simultaneous power transfer mode

After the recognition of the power receiver and the exchange of information necessary for power transmission is completed, the wireless power transmission service is started. The simultaneous power transfer mode during wireless power transmission is a mode in which wireless power is simultaneously transmitted to power receivers that require all service present in the charging zone. In order to increase the efficiency of the wireless power transmission, the matching is controlled based on the derived impedance value by sensing the voltage / current flowing through the antenna. More precise control is performed by receiving power received from the power receiver through communication and calculating the efficiency . When the adjustment for charging is completed, the wireless power transmission to all the power receivers is performed at the same time, which continues until the end of the wireless power transmission

6.3.2 Time division power transfer mode

After the recognition of the power receiver and the exchange of information necessary for wireless power transmission is completed, the wireless power transmission service is started. The time-sharing power transmission mode during the wireless power transmission is a mode in which the wireless power transmission is separately transmitted for each power receiver for a given time by dividing the allocated time in priority to the power receivers that need to provide all services present in the charging zone . A wireless power transmission service is provided only for the allocated time for each power receiver, and is terminated when all power receivers are serviced.

6.4 Unexpected situation management

If an unexpected situation occurs during the wireless power transmission service, stop the service and resolve the unexpected situation. The unexpected situation can be classified into foreign matter detection, the emergence of new power receivers and the disappearance of existing power receivers, and the exiting due to the buffering of existing power receivers. All unexpected situations are detected by sensing the voltage / current and impedance changes in the power transmitter from the power transmitter, recognizing the situation more precisely through communication, and then performing actions according to each situation.

6.4.1 Detecting Foreign Objects

When a foreign substance that changes the efficiency of the wireless power transmission appears, it recognizes it and notifies the user of the presence of the foreign substance in the form of an alarm.

6.4.2 The emergence of new power receivers and the disappearance of existing power receivers

If a new power receiver appears or the existing power receiver disappears, it is detected, impedance matching is performed to maximize the efficiency of the wireless power transmission again, and then the wireless power transmission service is restarted.

6.4.3 Buffering of existing power receivers

When the power receiver receiving the wireless power transmission service is buffered, the service is blocked and informs the power transmitter of the buffer through communication. The power transmitter resumes the wireless power transmission service to the remaining power receivers without considering the power receiver after receiving the buffer information.

6.5 Wireless Power Transmission Termination

The termination of the wireless power transmission is divided into a case where there is no power receiver to provide the wireless power transmission service and a case where the user desires to shut down. The presently provided wireless power transmission service is terminated and the power transmitter is put into the standby mode.

6.6 Power Reception Period Wireless Power Transmission

If the power transmitter is not present or the power receiver is not in the charging zone, it may request a wireless power transmission to the adjacent power receiver. Upon receiving the request, the power receiver may transmit the wireless power to the power receiver that requested the power transmission according to the user's selection.

7 Wireless Power Transmission Management

7.1 General

In order to perform wireless power transmission to multiple devices, communication and charge management are required and communication and charge control and functions are mainly performed based on scheduling. The wireless power transmission system can distinguish layers as follows.

5 is a block diagram of a wireless power transmission system according to an embodiment of the present invention.

The application performs overall system operation and management for wireless power transmission to multiple devices. The necessary data to perform this is exchanged between the elements between the power transmitter and the power receiver, and the system management is performed through the manager. It also manages and controls couplers that deliver substantial power through the manager.

This standard focuses on the management of applications, managers, and couplers that manages the charging of multiple devices. It does not address the components of the media access control layer and the physical layer associated with communications and their exchange of relevant parameters.

function


Component
Applicant
Power transmitter Power receiver Application-Manager Manager-Coupler Application-Manager Manager-Coupler Receiver Recognition / Authentication
2.2.1
2.2.2 2.3.1 2.5.1 Charging Zone / Communication Zone 2.2.3
2.2.4 2.3.2 2.5.2 Wireless power transmission Time division 2.2.5
2.2.6 2.3.3
2.3.4
2.3.5
2.3.6
2.3.7 2.4.1
2.4.2
2.4.3
2.4.4
2.4.5 2.5.3
2.5.4
2.5.8 2.6.1
2.6.2 The same time 2.2.5 2.3.3
2.3.4
2.3.5
2.3.6 2.4.1
2.4.2
2.4.3
2.4.5 2.5.4
2.5.8 2.6.2 Unexpected situation

Foreign matter 2.2.7 2.3.7 2.4.5 2.5.5 2.6.3 Appearance and disappearance 2.2.7 2.3.7 2.4.5 2.5.5 2.6.3 Buffer 2.2.8 2.3.8 2.4.6 2.5.7 2.6.5 Wireless power transmission termination 2.2.9 2.3.9 2.4.7 2.5.6 2.6.4

7.2 Application Component

In order to perform the functions defined in Section 6, the parameters including the commands and data for efficient power transmission between the power transmitter and the power receiver application should be exchanged and the management and control of the system based on the exchanged parameters should be involved. The contents exchanged between the applications are as follows.

7.2.1 Power Receiver ID Information

Based on the ID information of the power receiver, the power transmitter determines whether the power receiver is suitable for providing the wireless power transmission service. The definition of the component is as follows.

ATA-SCAN.request {

Req_join,

Dev_id,

}

7.2.1.1 Requesting power receiver ID information

7.2.1.1.1 When it is needed

This is necessary when the power transmitter makes a request to join power receivers in a wireless power transmission system.

7.2.1.1.2 Effect

The power receiver receives an ID information request command of the power transmitter.

7.2.1.2 Power Receiver ID Information Response

7.2.1.2.1 When it is needed

This is necessary if the power receiver is prepared to respond to the request for ID information received from the power transmitter.

7.2.1.2.2 Effect

The power transmitter receives the ID information from the power receiver and this information is used to determine whether the power transmitter desires to receive the wireless power transmission service of the power receiver.

factor type Value range Explanation Req_join Binary decision value 0 or 1 0: Wait state request
1: Receiver request to join Dev_id number 0x00-0xFF Receiver ID TBD

7.2.2 Notification of availability of wireless power transmission service

The power transmitter determines whether each power receiver is suitable for service provision based on the power receiver ID information, and notifies all power receivers. The definition of the component is as follows.

ATA-Service.inform {

Accept_deny,

Dev_num,

}

7.2.2.1 When it is needed

This is necessary when the power transmitter determines whether the service is suitable and notifies the result.

7.2.2.2 Effects

And selects a power receiver suitable for receiving a service to provide future wireless power transmission service only to the corresponding devices.

factor type Value range Explanation Accept_deny Binary decision value 0 or 1 0: Wireless charging disabled
1: Suitable for wireless charging Dev_num number 0x00-0xFF Give number to eligible receiver TBD

7.2.3 Power receiver information

Is a component that is exchanged with the power transmitter during the power reception period in order to recognize the wireless power transmission situation and provide an optimal power transmission according to the situation. The definition of the component is as follows.

ATA-DEV.request {

Frequency,

BattRemain,

BattDischarge,

MaxPwr,

Pwr,

Type,

RSSI,

}

7.2.3.1 Requesting power receiver information

7.2.3.1.1 When it is needed

This is necessary if the power transmitter needs to be aware of the wireless power transmission situation before performing the wireless power transmission.

7.2.3.1.2 Effects

The power transmitter obtains the required charging information from all power receivers.

7.2.3.2 Power receiver information response

7.2.3.2.1 When it is needed

It is necessary when the preparation for transmitting the power receiver information requested from the power transmitter is completed.

7.2.3.2.2 Effects

Management and control are possible for the power transmitter to obtain the required charging information from all power receivers and to provide optimal wireless power transmission.

factor type Value range Explanation Freq number 30kHz to 300MHz In case of a system using multiple wireless power transmission frequency bands, frequency information to be used in the corresponding power transmission BattRemain number 0% to 100% Current battery remaining amount of receiver BattDischarge number 0A to 1000A How much the battery is discharged MaxPwr number -50dBm to 100dBm Receiver can receive acceptable power level information Pwr number -50dBm to 100dBm Received power reception level Type Explanation Receiver Type Type A description that can identify the type of receiver RSSI number -80dBm to 100dBm Communication received signal strength TBD

7.2.4 Charging Zone / Communication Zone Judgment

Based on the information received from the power receiver, the power transmitter determines whether the charging zone or communication zone belongs to all the power receivers and notifies the information. The definition of the component is as follows.

ATA-ZONE.inform {

Zone,

}

7.2.4.1 When it is needed

It is necessary when the power transmitter manager determines whether all the power receivers are located and transmits them to the power transmitter application.

7.2.4.2 Effects

All power receivers identify the area to which they belong and the power transmitter prepares to provide the wireless power transmission to the power receiver belonging to the charging zone and the power receiver belonging to the communication zone maintains the wireless power transmission standby state, Power transmission.

factor type Value range Explanation Zone Binary decision value 0 or 1 0: charge zone
1: communication zone TBD

7.2.5 Notification of power transmission mode information

7.2.5.1.1 When it is needed

This is needed if the power transmitter application will select and inform the power receiver application of the wireless power transmission mode.

7.2.5.1.2 Effect

The power receiver application recognizes the wireless power transfer mode and is ready for the control of the power transmitter.

7.2.5.2 Power transmission mode information reception response

7.2.5.2.1 When it is needed

This is necessary if the power receiver application receives a wireless power transfer mode from a power transmitter application and signals a response thereto.

7.2.5.2.2 Effects

The power transmitter confirms the response of the power receiver and initiates the determined wireless power transmission mode.

factor type Value range Explanation CharMode number 1-5 1: Time division charge mode
2: Simultaneous charging mode
3 ~ 5: TBD TBD

7.2.6 Scheduling Information

The information used in the time-division priority charging mode includes the radio power transmission rank and allocation time information of each power receiver after scheduling. The definition of the component is as follows.

ATA-SCHEDULING.inform {

Priority,

TimeAmount,

}

7.2.6.1 Notification of scheduling information

7.2.6.1.1 When it is needed

This is necessary when the power transmitter informs each device of the scheduling information after the scheduling calculation in the time-division priority charging mode.

7.2.6.1.2 Effects

By notifying the priority information, it is a basis for preventing confusion of wireless charging and performing accurate scheduling.

7.2.6.2 Scheduling information response

7.2.6.2.1 When it is needed

This is necessary when receiving the scheduling information from the power transmitter and responding the acknowledgment to the power transmitter.

7.2.6.2.2 Effects

The power transmitter can verify the response of the power receiver and proceed with scheduling-based wireless power transmission

factor type Value range Explanation Priority number 1 to 100 Order information of each receiver TimeAmount number 1 second to 100000 seconds Time information for each receiver to charge TBD

7.2.7 Incident Management Information and Commands

When an unexpected situation occurs, the power transmitter recognizes the situation and informs the power receiver of the situation and includes information about the command corresponding to each situation. The definition of the component is as follows.

ATA-ABNORMAL.inform {

Abnormal,

CharOff,

Pwr

}

7.2.7.1 Provide information and commands for unexpected situation management

7.2.7.1.1 When it is needed

This is necessary if the power transmitter needs to detect an unexpected situation and resolve it.

7.2.7.1.2 Effects

When an unexpected situation occurs, the power transmitter transmits information and commands for controlling the power receiver to the power receiver application.

7.2.7.2 Unexpected situation management information response

7.2.7.2.1 When it is needed

This is needed if the power receiver needs to provide the power transmitter with the observations and necessary information to resolve the unexpected situation.

7.2.7.2.2 Effects

The power transmitter can obtain the information from the power receiver, and can more accurately and promptly make judgments and cope with the unexpected situation.

factor type Value range Explanation Abnormal Binary decision value 0 or 1 0: Unexpected situation
1: Unexpected situation CharOff Binary decision value 0 or 1 0: charge coil off
1: Charging coil on Pwr -50dBm to 100dBm Received power reception level Receiving power TBD

7.2.8 Power receiver cushion notification

And includes information informing the power transmitter when the power receiver becomes full during the wireless power transmission. The definition of the component is as follows.

ATA-FULL.inform {

Full,

}

7.2.8.1 Power receiver cushion notification

7.2.8.1.1 When it is needed

This is necessary when the power receiver is buffered and needs to be notified to the power transmitter.

7.2.8.1.2 Effects

The power transmitter informs the power transmitter of the buffering of the power receiver, and the power transmitter discontinues power transmission to the power receiver and excludes it from consideration in the future.

7.2.8.2 Power receiver cushion notification response

7.2.8.2.1 When it is needed

7.2.8.2.2 Effects

And notifies the power receiver of the response.

factor type Value range Explanation Full Binary decision value 0 or 1 0: non-buffering
1: buffer TBD

7.2.9 Power transmission termination notification

And terminates the wireless power transmission due to the user's request. The definition of the component is as follows.

ATA-END.inform {

End,

}

7.2.9.1 Notification of power transmission termination

7.2.9.1.1 When it is needed

This is necessary when terminating the wireless power transmission due to the user's request.

7.2.9.1.2 Effect

The wireless power transmission is terminated.

7.2.9.2 Power transmission end reception response

7.2.9.2.1 When it is needed

This is necessary when the power receiver receives a wireless power transfer termination notification from the power transmitter and responds to it.

7.2.9.2.2 Effects

Check whether the power receiver receives the power transmission notification and responds.

factor type Value range Explanation End Binary decision value 0 or 1 0: Exit
1: Continue TBD

7.3 Power transmitter application-to-manager component

The power transmitter application performs management and control to efficiently provide wireless power transmission to a plurality of devices with information received from the power receiver. The management and control of the power transmitter are performed by the application manager together with the manager.

7.3.1 Identifying identity information

The power transmitter application transmits the received power receiver ID information to the power transmitter manager to determine whether the corresponding device is suitable for receiving the wireless power service, notifies the application again, and includes the necessary information. The definition of the component is as follows.

CATM-QUALIFICATION.request {

Req_qualification,

Dev_id,

Rsp_qualification,

}

7.3.1.1 Request Identity Information Confirmation

7.3.1.1.1 When it is needed

This is necessary when the power transmitter application receives the ID information of the power receiver from the power receiver application and determines whether or not to provide the service.

7.3.1.1.2 Effects

The power receiver manager receives all the power receiver ID information from the power transmitter application to determine whether it is suitable for receiving the service.

7.3.1.2 Identity Information Acknowledgment

7.3.1.2.1 When it is needed

This is necessary when the power transmitter administrator determines whether all power receivers are suitable for receiving the service based on the power receiver ID information received from the power transmitter application and informs the application again.

7.3.1.2.2 Effects

And transmits to the power transmitter application whether or not all power receivers are judged to be suitably received by the service.

factor type Value range Explanation Req_qualification Explanation Request for eligibility Determining Eligibility Dev_num number 0x00 to 0xFF Give number to eligible receiver Rsp_qualification Binary decision value 0 or 1 0: Fit
1: Not suitable TBD

7.3.2 Charging Zone / Communication Zone Judgment

When the power transmitter application transmits the received signal strength information among the power receiver information received from the power receiver application to the power transmitter manager, the power transmitter manager determines whether each power receiver is located in the charging zone / communication zone based on the information. . The definition of the component is as follows.

CATM-ZONE.inform {

Req_Zone,

RSSI,

Rsp_Zone

}

7.3.2.1 Charging zone / communication zone discrimination request

7.3.2.1.1 When it is needed

This is necessary when the power transmitter application provides the power transmitter manager with the received signal strength information among the power receiver information to determine the position of the power receiver.

7.3.2.1.2 Effects

The power transmitter manager determines the charging zone / communication zone location of each power receiver based on the received information.

7.3.2.2 Charging zone / communication zone discrimination response

7.3.2.2.1 When it is needed

This is necessary when the power transmitter manager finishes the charging zone / communication zone position determination of each power receiver and transmits it to the power transmitter application.

7.3.2.2.2 Effects

When the discrimination information is transmitted to the power transmitter application, the power transmitter application informs all power receiver application whether the charging zone / communication zone location is determined, and the power transmitter application notifies the power receivers belonging to the charging zone to the wireless power transmission service provision target And prepare.

factor type Value range Explanation Req_zone Explanation Zone discrimination request Charging zone / communication zone discrimination request RSSI number -80dBm to 100dBm Communication received signal strength Rsp_zone Binary decision value 0 or 1 0: charge zone
1: communication zone TBD

7.3.3 Radio Power Transmission Frequency Control

In the case of a power transmitter capable of supporting several wireless power transmission frequency bands, if the wireless power transmission frequency information obtainable from the power receiver is obtained, factors necessary for setting the coupler to perform wireless power transmission at the corresponding frequency can be generated and adjusted Includes information to be delivered to the administrator. The definition of the component is as follows.

CATM-FREQ.control {

Dev_num,

Req_FreqControl,

}

7.3.3.1 When it is needed

This is necessary when it is determined that a change from the current frequency to another frequency is required before performing the wireless power transmission.

7.3.3.2 Effects

And notifies the manager of the frequency information, and the manager controls the coupler so as to perform the wireless power transmission corresponding to the frequency.

factor type Value range Explanation Dev_num number 0x00 to 0xFF Eligible receiver number Req_FreqControl
number
30kHz to 300MHz
Frequency information that the receiver can support TBD

7.3.4 Coupler Controls and Commands

In order to provide wireless power transmission to multiple devices in a situation-specific manner, the coupler of the power transmitter should be controlled so that the device can receive power at the highest radio power transmission efficiency, and information necessary for performing the same is included. The definition of the component is as follows.

CATM-COUPLER.control {

Dev_num,

Req_FreqControl,

}

7.3.4.1 When it is needed

It is necessary when recognizing the radio situation of power receivers or power receivers currently being supplied with wireless power and providing power transmission with the highest wireless power transmission efficiency before performing wireless power transmission.

7.3.4.2 Effects

When the controller informs the manager of the situation information necessary for controlling the current coupler, the manager derives the parameters that control the coupler based on the received information, and performs management and control.

factor type Value range Explanation Dev_num number 0x00 to 0xFF Eligible receiver number Req_FreqControl
number
30kHz to 300MHz
Frequency information that the receiver can support TBD

7.3.5 Output power level control

The output power of the power transmitter should be controlled so as not to damage the power receiver without exceeding the radio wave method and the human body harmfulness criterion. Also, since the power level required for each type of power receiver is different, It contains information necessary for The definition of the component is as follows.

CATM-POWER.control {

Dev_num,

Req_PwrControl,

}

7.3.5.1 When it is needed

This is necessary when the output power of the power transmitter is controlled in consideration of the charging status such as the type, position, inclination angle of the power receiver, regulation of the radio wave method, and human harmful intensity.

7.3.5.2 Effects

When the manager receives the charge status information from the application, it calculates the output power based on the information and informs the coupler of the output power so that the power control can be performed.

factor type Value range Explanation Dev_num number 0x00 to 0xFF Eligible receiver number Req_PwrControl
number
-50dBm to 100dBm
Received test power reception level TBD

7.3.6 Scheduling Information

When receiving the battery remaining amount and the battery discharge rate information of all the power receivers from the application, the manager includes information for calculating the factor values necessary for scheduling based on the information and transmitting the derived result values back to the application. The definition of the component is as follows.

CATM-SCHEDULING.request {

Dev_num,

BattRemain,

BattDischarge,

Priority,

TimeAmount,

}

7.3.6.1 Scheduling Request

7.3.6.1.1 When it is needed

It is necessary to set the sequence number of each device and the amount of each time allocation prior to the wireless power transmission service in case of charging the priority based time division charging mode among various modes for charging the multiple devices.

7.3.6.1.2 Effects

The manager performs the scheduling algorithm based on the information on the remaining battery level and the discharge rate to derive the factor values necessary for the scheduling.

7.3.6.2 Scheduling response

7.3.6.2.1 When it is needed

This is necessary when the scheduling request is received from the application and the manager performs the scheduling and replies the result to the application again.

7.3.6.2.2 Effects

And transmits the scheduling result value to the application to inform all power receivers and controls the coupler of the power transmitter according to the algorithm.

factor type Value range Explanation Dev_Num number 0x00 to 0xFF Receiver number information BattRemain number 0% to 100% Current battery remaining amount of receiver BattDischarge number 0% to 1000% How much the battery is discharged Priority number 1 to 100 Order information of each receiver TimeAmount number 1 second to 100000 seconds Time information for each receiver to charge TBD

7.3.7 Power Transmitter Current / Voltage Sensing

The power transmitter requires current and voltage value sensing to control the coupler for power level adjustment or impedance matching and includes information for performing it. The definition of the component is as follows.

CATM-SENSING.request {

Imp_change,

Current,

Voltage,

Impedance,

Change_inform,

}

7.3.7.1 Power transmitter current / voltage sensing request

7.3.7.1.1 When it is needed

Set the power receiver to always read the value during wireless power transmission.

7.3.7.1.2 Effects

Detects an unexpected condition of the wireless power transmission system, or performs output power level control or impedance matching.

7.3.7.2 Power transmitter current / voltage sensing response

7.3.7.2.1 When it is needed

This is necessary when the measured value and the calculated impedance value are larger than the reference value and the manager notifies the application.

7.3.7.2.2 Effects

And performs an unexpected condition detection, an output power level control, an impedance matching, and the like based on the current and voltage values reported from the manager and the change amount of the calculated impedance value.

factor type Value range Explanation Imp_change number 0 ohms to 10000 ohms The change in the calculated impedance value based on the measured current / voltage value Current number 0A to 1000A Measured current value Voltage number 0V ~ 10000V Measured voltage value Impedance number 0 ohms to 10000 ohms Calculated impedance value Change_inform Explanation Change alert Notify APP if the change is greater than the threshold TBD

7.3.8 Power receiver cushioning

When the power receiver notifies the buffer, the power transmitter includes information necessary to terminate the current wireless power transmission and prepare it to provide a wireless power transmission to the other power receiver. The definition of the component is as follows.

CATM-Full.control {

Dev_Num,

Req_FullControl

}

7.3.8.1 When it is needed

This is necessary when a buffer notification is delivered from the power receiver application to the power transmitter application.

7.3.8.2 Effects

The power transmitter application requests the power transmitter manager to terminate the current wireless power transmission due to the buffer.

factor type Value range Explanation Dev_num number 0x00 to 0xFF Receiver number information Req_fullControl
number
One
Control of the current wireless power transmission termination due to receiver cushioning TBD

7.3.9 Wireless Power Transmission Termination

When the power transmitter application receives the wireless power transmission termination request from the user, it stops the current wireless power transmission and includes information necessary for termination. The definition of the component is as follows.

CATM-Full.control {

Req_EndControl

}

7.3.9.1 When it is needed

This is necessary when the power transmitter application receives a request to end the wireless power transmission from the user.

7.3.9.2 Effects

The power transmitter application requests the power transmitter manager to terminate the user's wireless power transmission.

factor type Value range Explanation Req_EndControl Binary decision value 0 or 1 0: Keep current
1: Exit TBD

7.4 Transmitter Manager - Components Between Couplers

Defines the components between the controller and the coupler required for the coupler management and control of the power transmitter.

7.4.1 Radio Power Transmission Frequency Control

Includes information for selecting the frequency band required for the current wireless power transmission among the plurality of frequency bands that can be supported by the coupler. The definition of the component is as follows.

CMTC-FREQ.control {

Req_FreqControl,

}

7.4.1.1 When it is needed

This is necessary when the manager who is requested to change the frequency from the application calculates the parameter value for frequency change and provides it to the coupler.

7.4.1.2 Effects

The manager calculates and delivers to the coupler the necessary factor values for controlling the wireless power transmission frequency.

factor type Value range Explanation Req_FreqControl number 30kHz to 300MHz In case of a system using multiple wireless power transmission frequency bands, frequency information to be used in the corresponding power transmission TBD

7.4.2 Coupler control

In order to optimize the impedance matching that varies rapidly depending on the situation, impedance matching control of the coupler is necessary and includes necessary information. The definition of the component is as follows.

CMTC-COUPLER.control {

Req_MatchingControl,

}

7.4.2.1 When it is needed

This is necessary when the manager who requests the change of the coupler control from the application calculates the parameter value for changing the coupler and provides it to the coupler.

7.4.2.2 Effects

The controller calculates and delivers to the coupler the necessary factor values for coupler and matching control.

factor type Value range Explanation Req_MatchingControl number 0 ohms to 10000 ohms Change in matching value TBD

7.4.3 Output power level control

The manager includes information for coupler control for output power level control of the power transmitter. The definition of the component is as follows.

CMTC-POWER.control {

Req_PwrControl,

}

7.4.3.1 When it is needed

This is necessary when the manager who is requested to change the output power level control from the application calculates and outputs the factor value for changing the output power level to the coupler.

7.4.3.2 Effects

The manager calculates and delivers to the coupler the necessary factor values for output power level control.

factor type Value range Explanation Req_PwrControl number -50dBm to 100dBm Variation of output power value TBD

7.4.4 Scheduling Control

In order to control the priority in the time-division charge mode, the manager includes information necessary for controlling the coupler. The definition of the component is as follows.

CMTC-SCHEDULING.control {

Req_SchedulingControl,

}

7.4.4.1 When it is needed

This is necessary when the manager who has requested the scheduling from the application calculates and supplies the parameter value necessary for the scheduling to the coupler.

7.4.4.2 Effects

The manager calculates and delivers to the coupler the necessary factor values for scheduling control.

factor type Value range Explanation Req_SchedulingControl Explanation Control command Coupler control for scheduling TBD

7.4.5 Voltage / Current Sensing

Incorporates information necessary for the controller to control the coupler for current / voltage sensing, which is used as an observed value of the unexpected condition detection and matching control. The definition of the component is as follows.

CMTC-SENSING.request {

Current,

Voltage,

}

7.4.5.1 Voltage / Current Sensing Request

7.4.5.2 When is it necessary?

The power transmitter always reads the value while providing the wireless power transmission.

7.4.5.3 Effects

The controller calculates and delivers the parameter values required for voltage / current sensing to the coupler.

7.4.5.4 Voltage / Current Sensing Response

7.4.5.4.1 When it is needed

This is necessary when the voltage / current value observed during wireless power transmission is provided to the manager at regular intervals.

7.4.5.4.2 Effects

And transmits the observed current / voltage value to the manager in response.

factor type Value range Explanation Current number 0A to 1000A Observed current value Voltage number 0V to 1000V Observed voltage value TBD

7.4.6 Power receiver cushioning

When the power receiver notifies the buffer, the power transmitter includes information necessary to terminate the current wireless power transmission and prepare it to provide a wireless power transmission to the other power receiver. The definition of the component is as follows.

CMTC-Full.control {

Req_FullControl

}

7.4.6.1 When it is needed

This is necessary if the power transmitter manager receives the buffering notification from the power transmitter application.

7.4.6.2 Effects

The power transmitter manager requests the power transmitter coupler to terminate the current wireless power transmission due to the buffer.

factor type Value range Explanation Req_FullControl Binary decision value 0 or 1 0: Keep current
1: Exit TBD

7.4.7 End of wireless power transmission

If the power transmitter application receives the wireless power transmission termination request from the user, it stops the current wireless power transmission and includes information necessary for waiting until the next user receives the request. The definition of the component is as follows.

MTC-Full.control {

Req_EndControl

}

7.4.7.1 When it is needed

This is necessary when the power transmitter administrator receives a request to terminate the user's wireless power transmission from the power transmitter application.

7.4.7.2 Effects

The power transmitter manager requests the power transmitter coupler to terminate the user's wireless power transmission.

factor type Value range Explanation Req_EndControl Binary decision value 0 or 1 0: Keep current
1: Exit TBD

7.5 Power Receiver Application-to-Manager Component

At the request of a power transmitter application, a component of the receiver's application and manager is defined to prepare the information necessary for the wireless receiver to charge the wireless receiver or to control the coupler of the power receiver.

7.5.1 Power Receiver ID Information

And preparation information for providing the ID information of the power receiver according to the ID information request of the power transmitter. The definition of the component is as follows.

DATM-DEVID.request {

Req_id,

Rsp_id,

}

7.5.1.1 Requesting power receiver ID information

7.5.1.1.1 When it is needed

This is necessary if a power receiver ID information request is received from the power transmitter application.

7.5.1.1.2 Effect

The application of the power receiver requests the ID information of the power receiver to the manager.

7.5.1.2 Responding to power receiver ID information

7.5.1.2.1 When it is needed

This is necessary when the power receiver manager is ready to provide the ID information to the power receiver application.

7.5.1.2.2 Effects

The power receiver application prepares to transmit the ID information received from the manager to the application of the power transmitter.

factor type Value range Explanation Req_id Explanation Request ID information Request ID information Rsp_id number 0x00 to 0xFF Used for authentication such as receiver ID TBD

7.5.2 Power receiver information

Includes information that the power receiver provides and provides at the request of the power transmitter to recognize the wireless power transmission situation and provide optimal power transmission in accordance with the situation. The definition of the component is as follows.

DATM-DEVINFO.request {

Req_Devinfo,

Freq,

MaxPwr,

BattRemain,

BattDischarge,

Pwr,

Type,

RSSI,

}

7.5.2.1 Requesting power receiver information

7.5.2.1.1 When it is needed

This is necessary if a power receiver information request is received from the application of the power transmitter.

7.5.2.1.2 Effects

An application of the power receiver requests power receiver information to the manager of the power receiver.

7.5.2.2 Power receiver information response

7.5.2.2.1 When it is needed

This is necessary if the power receiver manager is ready to deliver the power receiver information to the power receiver application.

7.5.2.2.2 Effects

The power receiver application prepares to transmit the ID information received from the manager to the application of the power transmitter.

factor type Value range Explanation Req_Devinfo Explanation Receiver information request, all or some of the following parameters can be requested Receiver information request Freq number 30kHz to 300MHz In case of a system using multiple wireless power transmission frequency bands, frequency information to be used in the corresponding power transmission MaxPwr number -50dBm to 100dBm Receiver can receive acceptable power level information BattRemain number 0% to 100% Current battery remaining amount of receiver BattDischarge number 0A to 1000A How much the battery is discharged Pwr number -50dBm to 100dBm Received power reception level Type Explanation Receiver Type Type A description that can identify the type of receiver RSSI number -80dBm to 100dBm Communication signal reception intensity level TBD

7.5.3 Scheduling Control

Based on the scheduling information received from the power transmitter application, the power receiver application controls the power receiver coupler according to the scheduling through the power receiver manager and includes the necessary information. The definition of the component is as follows.

DATM-SCHEDULING.request {

Req_SchedulingControl

Priority,

TimeAmount,

}

7.5.3.1 When it is needed

This is necessary when the power receiver receives the scheduling information from the application of the power transmitter.

7.5.3.2 Effects

The power receiver application transmits the reception scheduling information to the power receiver manager so as to calculate the factor values required for the current coupler control based on the received scheduling information.

factor type Value range Explanation Req_SchedulingControl Binary decision value 0 or 1 0: Keep current
1: control request Priority number 1 to 100 Order information of each receiver TimeAmount number 1 second to 100000 seconds Time information for each receiver to charge TBD

7.5.4 Current / voltage sensing

And includes information for sensing the current / voltage when a request for the received power level is received from the power transmitter application, calculating power and then transmitting the information to the application of the power transmitter. The definition of the component is as follows.

DATM-SENSING.request {

Current,

Voltage,

Pwr,

}

7.5.4.1 Requesting Current / Voltage Sensing

7.5.4.1.1 When it is needed

This is necessary when receiving a test power receive level and a receive power level request from an application of the power transmitter.

7.5.4.1.2 Effect

An application of the power receiver asks the manager of the power receiver for received power level information, which is implemented based on current / voltage sensing.

7.5.4.2 Current / voltage sensing response

7.5.4.2.1 When it is needed

This is necessary when receiving a request from an application of the power receiver and calculating the received power level through current / voltage sensing.

7.5.4.2.2 Effects

The manager of the power receiver delivers the current / voltage sensing information or the received power level information to the application of the power receiver and this information is used to control the output power of the power transmitter.

factor type Value range Explanation Current number 0A to 1000A Measured current value Voltage number 0V to 1000V Measured voltage value Pwr number -50dBm to 100dBm Calculated power value TBD

7.5.5 Unexpected situation control

Based on the unexpected situation control information received from the power transmitter application, the power receiver application includes information for resolving the unexpected situation through the power receiver manager. The definition of the component is as follows.

DATM-ABNORMAL.request {

Req_AbnormalControl,

}

7.5.5.1 When it is needed

This is necessary when the power receiver receives the unexpected situation control information from the application of the power transmitter.

7.5.5.2 Effects

The power receiver application transmits the reception control information to the power receiver manager so as to calculate the factor values required for the current coupler control based on the unexpected situation control information received.

factor type Value range Explanation Req_Abnormal Binary decision value 0 or 1 0: Keep current
1: control request TBD

7.5.6 Power transmission termination control

Upon receipt of the power transfer termination control from the power transmitter application, the power receiver application includes information for power receiver coupler control to effect power termination via the power receiver manager. The definition of the component is as follows.

DATM-END.request {

Req_EndControl,

}

7.5.6.1 When it is needed

This is necessary when the power receiver receives power transmission termination control information from an application of the power transmitter.

7.5.6.2 Effects

The power receiver application communicates control information to the power receiver manager to control the coupler so that it can perform power transfer termination control.

factor type Value range Explanation Req_EndControl Binary decision value 0 or 1 0: Keep current
1: control request TBD

7.5.7 Notification of buffering

The power receiver that has received the wireless power includes information for terminating the reception when the battery is full and delivering the contents to the power transmitter so as to terminate the power transmission and not to consider the power to the corresponding power receiver after the next wireless power transmission. The definition of the component is as follows.

DATM-FULL.request {

Inf_Full

Req_FullControl,

}

7.5.7.1 When it is needed

This is necessary if the administrator of the power receiver has confirmed the battery buffering.

7.5.7.2 Effects

factor type Value range Explanation Inf_Full Binary decision value 0 or 1 0: non-buffering
1: buffer Req_FullControl Binary decision value 0 or 1 0: Keep current
1: control request TBD

7.5.8 Notification of Discharge Rate Change

When the power receiver senses a change in battery discharge rate, it transmits the contents to the power transmitter to thereby include information that is useful for scheduling and power control. The definition of the component is as follows.

DATM-BATT.inform {

Inf_Batt,

Inf_BattChange,

}

7.5.8.1 When it is needed

This is necessary when the administrator of the power receiver confirms the change of the battery discharge rate.

7.5.8.2 Effects

The manager of the power receiver informs the application of the power receiver of the battery charge rate change and the change amount.

factor type Value range Explanation Inf_Batt number 0A to 1000A Current battery discharge rate value Inf_BattChange Binary decision value 0 or 1 0: No change
1: Change TBD

7.6 Power Receiver Manager - Components Between Couplers

Defines the components between the supervisor and the coupler required for coupler management and control of the power receiver.

7.6.1 Scheduling Control

The power receiver manager includes information necessary for controlling the coupler based on the received control command to control the coupler of the power receiver in accordance with the scheduling. The definition of the component is as follows.

DMTC-SCHEDULING.request {

Req_SchedulingControl

}

7.6.1.1 When it is needed

This is necessary when the power receiver receives the scheduling information from the application of the power transmitter.

7.6.1.2 Effects

The power receiver manager controls the current coupler based on the received scheduling information.

factor type Value range Explanation Req_SchedulingControl Binary decision value 0 or 1 0: Keep current
1: control request TBD

7.6.2 Current / voltage sensing

The power receiver manager performs current / voltage sensing to detect changes in the receiving network or to calculate the received power, and defines the information needed to do so. The definition of the component is as follows.

DMTC-SENSING.request {

Req_Sensing,

Current,

Voltage,

}

7.6.2.1 Requesting Current / Voltage Sensing

7.6.2.1.1 When it is needed

It always requests sensing every fixed time while receiving wireless power.

7.6.2.1.2 Effects

The manager of the power receiver sends a control command to the coupler to sense voltage and current during power reception.

7.6.2.2 Current / voltage sensing response

7.6.2.2.1 When it is needed

This is necessary when the power receiver manager requests current / voltage sensing for reception power calculation.

7.6.2.2.2 Effects

The power receiver coupler measures the current / voltage value and delivers it to the manager of the power receiver.

factor type Value range Explanation Req_Sensing Binary decision value 0 or 1 0: No request
1: Transfer request Current number 0A to 1000A Measured current value Voltage number 0V to 1000V Measured voltage value TBD

7.6.3 Unexpected situation control

The power receiver manager controls the coupler of the power receiver with the factor values calculated to solve the unexpected situation and includes the necessary information. The definition of the component is as follows.

DMTC-ABNORMAL.request {

Req_AbnormalControl,

}

7.6.3.1 When it is needed

This is necessary when the unexpected situation control information is received from the application of the power receiver.

7.6.3.2 Effects

The power receiver manager controls the current coupler based on the received unexpected condition control information.

factor type Value range Explanation Req_AbnormalControl Binary decision value 0 or 1 0: No change
1: control request TBD

7.6.4 Power Transmission Termination Control

The power receiver manager controls the coupler for power transmission termination control and includes related information. The definition of the component is as follows.

DMTC-END.request {

Req_EndControl,

}

7.6.4.1 When to Use

This is necessary when the power transmission termination control information is received from the application of the power receiver.

7.6.4.2 Effects

The power receiver manager controls the current coupler based on the received power transmission termination control information.

factor type Value range Explanation Req_EndControl Binary decision value 0 or 1 0: No change
1: control request TBD

7.6.5 Notification of buffering

The power receiver that received the wireless power needs the coupler control to terminate the reception when the battery is fully charged, and it contains relevant information. The definition of the component is as follows.

DMTC-FULL.request {

Req_FullControl,

}

7.6.5.1 When it is needed

This is necessary if the administrator of the power receiver has confirmed the battery buffering.

7.6.5.2 Effects

The manager of the power receiver controls the coupler of the power receiver so that the power receiver no longer receives power.

factor type Value range Explanation Req_FullControl Binary decision value 0 or 1 0: No change
1: control request TBD

8 Wireless Power Transmission Control Interface Protocol

8.1 General

Information to be exchanged in order to efficiently perform wireless power transmission, and data for wireless low power transmission network control and management between the power transmitter and the power receiver is defined in the form of a frame, and the actually transmitted message is defined.

8.2 Frame Format

8.2.1 Frame structure

The frame including the data for the wireless power transmission control is constituted by the elements shown in Table 42. Through the frame configured as shown in Table 1, the power transmitter transmits a control command to the power receiver, and the power receiver transmits the power transmission information to the power transmitter.

Table 1 - Frame structure

8.2.2 Field Descriptions

The start field consists of one byte and represents the beginning of one frame and has a fixed value of 0x7E.

The power receiver number field consists of one byte and the power transmitter is used to identify the power receiver at the application. If the power receiver number is 0xFF, it means all power receivers.

The code field is composed of one byte and is a code allocated to each frame type in order to classify the types of frames to be transmitted. For more information, see 3.3. Refer to the frame type.

The control field is composed of one byte, and provides frame serial number information and payload length information for each code. The serial number refers to a sequential number assigned to each consecutive code frame in order to prevent frames lost during message transmission. The payload length indicates the length, in bytes, of the payload field following the control field. The payload field has a variable length of 0 to N bytes and contains the actual data to be transferred. See payload format.

The CRC field consists of one byte and is used to determine whether the frame body has been received without error. The standard generating polynomial for generating a frame check sequence is as follows.

The end field consists of one byte and represents the end of the frame. Like the start field, it has a fixed value of 0x7F.

Table 2 - Field Description Summary

8.3 Frame Type

As shown in Table 3, the frame type is defined as four types of frames: a request frame, a response frame, a data frame, and an acknowledgment frame.

Table 3 Frame Type Values

8.3.1 Request frame

The request frame is used by the power transmitter to send a request packet to a specific power receiver in a request interval or to broadcast information to all receivers. The request frame format is shown in Table 4. When broadcasting the request frame, the power receiver number in the frame header is 0xFF.

Table 4 - Request Frames

8.3.2 Response frame

The response frame is used to transmit the response packet of the power receiver to the request of the power transmitter. Table 5 shows the response frame format. It is mainly used when the charge information of the power receiver is responded to at the request of the power transmitter.

Table 5 - Response Frames

8.3.3 Data frames

The data frame is used when the power receiver is notified of the buffering of the power receiver or the change of the amount of discharge, even when the power transmitter is not requested, as shown in Table 6.

Table 6 - Data Frame

8.3.4 Receive notification frame

The acknowledgment frame is the acknowledgment frame of the power transmitter for the acknowledgment of the power receiver and the buffer notification for the received charging mode, time division order, charge termination. The data acknowledgment frame consists of only the frame header without the frame body as shown in Table 7.

Table 7 - Receive Notification Frame

8.4 Payload Format

The payload format is configured differently depending on the frame type such as a request frame, a response frame, a data frame, and an acknowledgment frame.

8.4.1 Request frame

The payload format of the request frame consists of a length, a request code, and one or more request blocks, as shown in Table 8. If the power receiver number is 0xFF in the frame header, a response is requested to all power receivers of the group. Each block contains requested data information.

Table 8 - Request Frame Payload Format

8.4.1.1 Length

The length field consists of 1 byte and represents the sum of the request block lengths, and the value of the length field is variable according to the length and the number of request blocks.

8.4.1.2 Request Code and Request Data

The contents of the request code in the payload of the request frame and the request block of the request code are as follows.

Table 9 - Requested Code and Data

8.4.2 Response frame

The payload of the response frame has response data for the request. The response frame payload is shown in Figure 19. The first 1 byte is the group address, the next 1 byte is the response data length (L), the response code, and the next L bytes are response data.

Table 10 - Response Frame Payload Format

8.4.2.1 Length

The length field consists of one byte and represents the length of the response data and is variable depending on the type of response data.

8.4.2.2 Response Codes and Response Data

The contents of the response code in the payload of the response frame and the data of the corresponding response code are as follows.

Table 11 - Response codes and data

8.4.3 Data frames

The payload of the data frame has data that informs the power transmitter of an emergency that the power transmitter is aware of without the request of the power receiver. The response frame payload is shown in Table 12. The first one byte is the data code and the next L bytes are the data.

Table 12 - Data Frame

8.4.3.1 Data codes and blocks

The data code in the payload of the data frame and the data contents of the data code are as follows.

Table 13 - Data codes and blocks

8.4.4 Receive Notification Frame

The response acknowledgment frame payload is used in the case of a reception notification for the wireless power transmission mode of the power receiver, a reception notification for the reception scheduling information, a notification for the wireless power transmission termination notification, and a reception notification for the buffer information of the power transmitter It notifies the sender of its reception by sending only the header without the frame payload. It can be applied in more cases in the future.

Table 14 - Receive Notification Frame

9 Wireless Power Transmission Control Interface Procedure

9.1 General

There are processes such as authentication, power transmission, and termination to provide wireless power transmission services to a plurality of power receivers. Procedures for recognizing and authenticating power receivers and for performing wireless power transmission in a power transmission mode including simultaneous power transmission and time division power transmission, procedures to be performed in distinct charging zones and communication zones, and procedures for power transmission termination And processes that must be accompanied when an unexpected situation occurs during wireless power transmission.

9.2 Power Receiver Recognition / Authentication and Charging Zone / Communication Zone

When the power transmitter sends a join request for the join request, the power receiver receiving the communication signal sends its ID to the join response. The power transmitter checks the ID of the received power receiver and informs that the target is unavailable if it is not the target of the wireless power transmission service, and requests data if the target. The power receiver receiving the data request sends the power receiver information (battery remaining amount, battery discharge rate, charging frequency, required receiving power, etc.) to the power transmitter in the data response. Upon receiving the power receiver information, the power transmitter analyzes the received data and determines whether the corresponding power receiver is currently located in the charging zone / communication zone based on the reception intensity information. If the power receiver is in the communication zone, it is notified to the power receiver and the power receiver informs the user that his location is in the current wireless power transmission communication zone. If the power receiver is in the charging zone, the power receiver is informed that it is in the charging zone and the power transmitter considers the power receiver to be a wireless power transmission service provider.

Figure 6 - Power Receiver Recognition / Authentication and Charging Zone / Communication Zone

9.3 Simultaneous power transmission

The power transmitter that selects the simultaneous power transfer mode performs impedance matching that generates the highest radio transmission efficiency prior to performing the actual wireless power transmission. The frequency is adjusted to the wireless power transmission frequency obtained from the power receiver information and the test power is transmitted to calculate the impedance through the current / voltage sensing value of the power transmitter. This performs a primary impedance match, transmits the test power again, and receives the received power level from the power receiver to perform a secondary fine impedance match. When the optimum impedance matching is completed, the wireless power transmission service starts to be provided and the service continues until the unexpected situation and the end of the wireless power transmission.

Figure 7 - Simultaneous power transfer

9.4 Time-sharing power transmission

The power transmitter selecting the time division power transmission mode performs scheduling calculation based on the power receiver information obtained from the power receiver, calculates the order and time, and notifies all power receivers thereof. For each power receiver based on the calculated order and time, impedance matching is performed to generate the best radio transmission efficiency prior to actual power transmission. The frequency is adjusted to the wireless power transmission frequency obtained from the power receiver information and the test power is transmitted to calculate the impedance through the current / voltage sensing value of the power transmitter. This performs a primary impedance match, transmits the test power again, and receives the received power level from the power receiver to perform a secondary fine impedance match. Upon completion of the optimum impedance matching, the wireless power transmission service starts providing and provides wireless power transmission for the estimated time and provides wireless power transmission to the next power receiver in accordance with the scheduling order. If an unexpected situation occurs during the wireless power transmission, and the wireless power transmission end occurs, the current service is terminated.

Figure 8 - Time-sharing power transmission

9.5 Emergency situation

An important observation to recognize an extreme situation is the current / voltage sensing value. If the measured current, voltage, and calculated impedance value change is severe, the power transmitter determines that an unexpected situation has occurred, and performs a process of recognizing that the sensor is one of three situations: foreign matter, appearance of power receiver, After judging, we will take action according to the rest of the procedure.

9.5.1 Remove foreign matter

If the measured current, the voltage, and the calculated impedance value change significantly, it is determined that an unexpected situation has occurred in the charging environment, the current wireless power transmission is stopped, and charging information is requested to all power receivers. If all power receivers are present, it is judged to be a foreign object. Current / voltage sensing is performed through wireless power transmission several times in order to determine whether the obstruction of wireless power transmission of the foreign matter is temporary or continuous. If the value is continuously maintained, it is judged as continuous foreign matter, Function.

Figure 9 - Removing debris

9.5.2 The emergence of new power receivers and the disappearance of existing power receivers

If the measured current, the voltage, and the calculated impedance value change significantly, it is determined that an unexpected situation has occurred in the charging environment, the current wireless power transmission is stopped, and charging information is requested to all power receivers. If all of the power receivers do not exist or the added power receiver is identified, it is regarded as a change in impedance due to the appearance or disappearance of the power receiver, not the foreign substance, and the changed impedance is grasped and the optimum matching is performed and then the wireless power transmission is performed .

Figure 10 - New power receiver appears and old power receiver disappears

9.5.3 Buffering of existing power receivers

If the power receiver detects a battery buffering while receiving the wireless power, it notifies the power transmitter of its own buffer and the power antenna is cut off. The power transmitter informed of the buffering state notifies the power receiver that the buffering has been informed to start the wireless power transmission to the other power receiver without judging that the wireless power transmission should be considered.

Figure 11 - Buffer existing power receiver

9.6 Power Transmission Termination

When the user requests the power transmitter to terminate the wireless power transmission, the power transmitter stops the current wireless power transmission and waits for the next request in the standby mode.

Figure 12 - Power Transmission Termination

9.7 Transferring power between devices

A power receiver that requires wireless power reception but does not find a power transmitter at an adjacent distance may request a wireless power transmission to a neighboring power receiver. At this time, it provides its basic power receiver information to inform the user that the power receiver receiving the wireless power transmission request has given the power transmission to the requested power receiver. When the user approves, a wireless power request response is sent and both the requested power receiver and the responding power receiver inform the user of the requirements and method for charging the power reception period. When conditions are met for the method, a wireless power transmission is provided from the power receiver to the power receiver.

Figure 13 - Power transfer between devices

9.8 Battery charge rate change notice

When the power receiver confirms the change of the battery discharge rate, it is judged whether there is a person around the power receiver, and the fact is informed to the power transmitter so that the power transmitter can control the wireless power transmission output power which does not exceed the human hazard. If a wireless power transmission is being provided, pause it, control the output power, and send it again.

Figure 14 - Notification of battery discharge rate change

While the invention has been described in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the appended claims are intended to embrace all such modifications and variations as fall within the true spirit of the invention.

Claims (6)

CLAIMS What is claimed is: 1. A method for charging a wireless charging device with a wireless power transmission device in a multiple-device wireless charging system comprising a wireless power transmission device and a plurality of wireless charging devices spaced apart from the wireless power transmission device,
Performing the first impedance matching by transmitting the first test power to the plurality of wireless rechargers and detecting the current and voltage of the wireless power transmitter according to the test power;
Performing the second impedance matching based on the received power information received from each of the plurality of wireless charging devices, and transmitting the second test power to the plurality of wireless charging devices; And
And simultaneously transmitting power to the plurality of wireless chargers based on the second impedance matching result,
Further comprising the step of recognizing an unexpected condition including the presence of a foreign object and the appearance of an electric power receiver or a power-off based on a change amount measuring a current, a voltage and an impedance value flowing through the antenna of the wireless power transmission apparatus,
A second step of requesting a plurality of wireless charging devices to request charging information; a third step of receiving charging information from a plurality of wireless charging devices in response to the request; If there is no change in the amount of change while repeating the fourth step for N times, recognizing the occurrence of the foreign substance as an unexpected situation, transmitting the presence of the foreign substance to the wireless charger, detecting a change in the amount of change , Resumes the power transmission,
If the new charging information is received or the previously received charging information is not received in the third step, it is recognized as an unexpected situation indicating the emergence of a new power receiver or the exiting of the existing power receiver, and the impedance due to appearance or disappearance of the power receiver Wherein the first impedance matching and the second impedance matching are performed after the first impedance matching and the second impedance matching are performed. 2. The method of claim 1, wherein, prior to performing the first impedance matching,
Further comprising changing the frequency of the wireless power transmission apparatus to a wireless power transmission frequency obtained from the wireless charging apparatus information received from at least one of the plurality of wireless charging apparatuses. 2. The method of claim 1, wherein in performing the second impedance matching,
Wherein the wireless power transmission apparatus transmits the second test power to the plurality of wireless charging apparatuses and then requests the received wireless power information to the plurality of wireless charging apparatuses. 2. The method of claim 1, wherein in performing the second impedance matching,
Wherein the wireless power transmission device receives the reception power information from each of the plurality of wireless charging devices and then calculates a wireless power transmission efficiency of each of the plurality of wireless charging devices based on the reception power information Charging method. 2. The method of claim 1, further comprising:
And when the charging is completed, the wireless power transmission apparatus notifies each of the plurality of wireless charging apparatuses of the end of the wireless power transmission. 6. The method of claim 5, wherein after notifying the end of the wireless power transmission,
Wherein each of the plurality of wireless charging devices turns off the power antenna.

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