WO2014176838A1

WO2014176838A1 - Method and system for identifying receiving end of multi-coil array-type wireless power supply system

Info

Publication number: WO2014176838A1
Application number: PCT/CN2013/080784
Authority: WO
Inventors: 李聃; 刘宝; 孙伟; 董秀莲; 张从鹏; 刁德鹏
Original assignee: 海尔集团技术研发中心; 海尔集团公司
Priority date: 2013-04-28
Filing date: 2013-08-05
Publication date: 2014-11-06
Also published as: CN104124768A; CN104124768B

Abstract

A method and system for identifying a receiving end of a multi-coil array-type wireless power supply system. The method comprises: a transmitting end activates transmitting end coils at where a receiving end is located (S10); the transmitting end determines whether or not an RXID signal is received within a predetermined time, t_{first signal timeout} (S20); if yes, then the transmitting end identifies the receiving end as an expected receiving end (S200); and, if not, the transmitting end identifies the receiving end as a foreign object (S201). The method and system employ a time-division multiplexing system with respect to a multi-coil array of the transmitting end, sequentially activate the transmitting end coils at where the receiving end is located, and, by determining whether or not the RXID signal allowing unique identification of the identity of the expected receiving end is received by the transmitting end within the time of t_{first signal timeout}, identify whether or not the receiving end is the expected receiving end, thus achieving the goal of identification of the identity of the receiving end by the multi-coil array-type wireless power supply system, and allowing for implementation of commercialized applications based on receiving end identity.

Description

Multi-coil array type wireless power supply system receiving end identification method and system

The invention belongs to the field of wireless power supply, and in particular relates to a receiving end identification method and system for a multi-coil array type wireless power supply system.

Background technique

With the rapid development of electronic technology, various electronic devices have rapidly entered people's lives. Nowadays, people have several kinds of electronic devices that have become very common. For example, a person can have several electronic devices such as mobile phones, IPAD, and MP4 at the same time. These electronic devices bring great convenience and fun to people's lives, and at the same time, they also have a series of troubles, such as the power supply of these electronic devices. The power supply interfaces of these electronic devices are generally different, which means that people need several different power supply devices when they have several electronic devices. Currently, most power supply devices are connected to the power supply by wire. It is conceivable that the use of current power supply equipment can cause clutter in the indoor environment.

To this end, the wireless power supply system should be produced. The wireless power supply system includes a transmitting end and a receiving end, and the transmitting end is a wireless power supply device, and the receiving end is a variety of electronic devices to be powered. Nowadays, multi-coil array wireless power supply systems have a broader market prospect with their efficient power supply efficiency. As we all know, the wireless power supply system uses electromagnetic fields to transmit energy. When using a wireless power supply system, if there is metal foreign matter near the transmitting end of the wireless power supply system, some energy will be accidentally transmitted to the metal foreign matter, resulting in loss of energy in the wireless power supply system. Moreover, the metal foreign matter receives the energy and the temperature rises, which will affect the normal operation of the wireless power supply system. It can be seen that the identification of the receiving end of the wireless power supply system is crucial. At present, the identification of the receiving end of the multi-coil array type wireless power supply system is still blank. The existing multi-coil array type wireless power supply system cannot identify the receiving end identity, and cannot realize the commercial application based on the receiving end identity. Summary of the invention

In order to solve the problem that the existing multi-coil array type wireless power supply system cannot recognize the identity of the receiving end and cannot realize the commercial application based on the receiving end identity, the present invention provides a receiving end identification method and system for the multi-coil array type wireless power supply system. The present invention is directed to a multi-coil array at the transmitting end, adopts a time division multiplexing system, and sequentially activates the transmitting end coil at the position of the receiving end, and determines whether the transmitting end coil is uniquely capable of identifying the desired receiving end by determining whether the transmitting end coil is received within ^ _3⁄4 . The RXID signal is used to identify whether the receiving end is the desired receiving end, thereby achieving the purpose of identifying the receiving end of the multi-coil array type wireless power supply system, and realizing the commercial application based on the receiving end identity.

The technical scheme of the present invention is as follows:

A receiving method for identifying a receiving end of a multi-coil array type wireless power supply system, comprising: a transmitting end coil at a position where the transmitting end starts the receiving end;

The transmitting end determines whether the RXID signal is received within the preset time t_«, and if so, the transmitting end identifies the receiving end as the desired receiving end, and activates the transmitting end coil at the position of the receiving end to the receiving end Power is supplied; otherwise, the transmitting end recognizes the receiving end as a foreign object, and marks the state of the transmitting end coil at the position of the receiving end as a "foreign matter" state;

The RXID signal is a signal that is expected to be periodically sent by the receiving end to identify the identity of the desired receiving end, and includes command information and data information.

Further, the transmitting end coil at the position where the transmitting end starts the receiving end is specifically configured to start the transmitting end coil at the position of the receiving end by using a time division multiplexing system.

The transmitting end adopts a time division multiplexing system to sequentially start the transmitting end coil at the position of the receiving end, and includes: dividing the transmitting end coil array into N groups;

Dividing the unit time of the communication channel into N time slots;

Allocating a time slot for each group of coils, the transmitting end sequentially cuts the communication channel in the order of the time slots Switching to the group coil corresponding to the current time slot in which the communication channel is located, thereby starting the transmitting end coil at the position where the receiving end is located.

Further, the transmitting end identifies the receiving end as a desired receiving end, and starts the transmitting end coil at the position of the receiving end to supply power to the receiving end, and further includes: the transmitting end determines whether the expected receiving end state is normal. If yes, the transmitting end continues to supply power to the desired receiving end; otherwise, the transmitting end marks the transmitting end coil state at the position where the desired receiving end is located as an "abnormal" state, and stops supplying power to the desired receiving end.

Further, the transmitting end determines whether the expected receiving end state is normal or not: the transmitting end detects whether the transmitting end coil at the position where the desired receiving end is located receives the RXID signal in the RxID timeout period with the maximum time of the preset time N, If so, the desired receiving end state is normal; otherwise, the expected receiving end state is abnormal.

Further, before the transmitting end starts the transmitting end coil at the position of the receiving end, the method further includes: the transmitting end positioning the receiving end, and the transmitting end positioning the receiving end comprises: dividing the transmitting end coil array For a plurality of positioning units, each positioning unit includes a plurality of positioning areas, each of which includes a plurality of coils; one of several coils of each positioning area, one of which is a positioning coil, and the other is a common coil; One of the positioning coils of the unit is selected as a representative positioning coil; the positioning area corresponds to the positioning coil, and the positioning unit corresponds to the representative positioning coil;

The transmitting end periodically detects whether the representative positioning coil of the positioning unit has a receiving end; when detecting that the representative positioning coil has a receiving end, the positioning unit corresponding to the receiving end is found from the representative positioning coil, and all the positioning areas included therein are found from the positioning unit. Finding all the positioning coils corresponding to all the positioning areas from all the found positioning areas, finding the positioning coil closest to the receiving end from all the positioning coils; finding the positioning coil closest to the receiving end, and then finding the positioning coil Describe the nearest pair of positioning coils from the receiving end The positioning area should be located from all the coils of the positioning area to find the coil at the position of the receiving end. A multi-coil array type wireless power supply system receiving end identification system includes: a transmitting end and a receiving end. The transmitting end comprises: an AC/DC module, a controller, a driving detecting module, a transmitting coil array and a communication module, and an output end of the AC/DC module is connected with a power input end of the driving detecting module, and a signal input end and a control of the driving detecting module The control end of the device is connected, the feedback end of the driving detection module is connected with the input end of the communication module, the control detection end of the driving detection module is connected with the transmitting end coil array, and the output end of the communication module is connected with the input end of the controller.

The transmitting end controller controls the transmitting end coil at the position where the detecting module drives the receiving end; the driving detecting module detects the signal received by the transmitting end coil at the position of the receiving end; and the driving detecting module passes the detected signal through the communication module Sending to the transmitting end controller; the transmitting end controller determines whether the RXID signal is received within the preset time t wr^w, and if so, the transmitting end controller recognizes the receiving end as the desired receiving end, and controls the driving detection The module drives the transmitting end coil at the position of the receiving end to supply power to the receiving end; otherwise, the transmitting end controller recognizes the receiving end as a foreign object, and marks the state of the transmitting end coil at the position of the receiving end as " Foreign body "state. The RXID signal is a signal that is expected to be periodically transmitted by the receiving end and can identify the identity of the desired receiving end, and includes command information and data information.

Further, the transmitting end controller sequentially starts the transmitting end coil at the position of the receiving end by using a time division multiplexing system. The transmitting end controller adopts a time division multiplexing system to sequentially start the transmitting end coil at the position of the receiving end, including:

Dividing the array of transmitting coils into N groups;

Dividing the unit time of the communication channel into N time slots;

Allocating a time slot for each group of coils, the transmitting end sequentially switches the communication channel to the group coil corresponding to the current time slot where the communication channel is located in the order of the time slot, thereby starting the location of the receiving end The transmitting coil.

Further, the transmitting end controller identifies the receiving end as a desired receiving end, and controls the driving detecting module to drive the transmitting end coil at the position of the receiving end, and after the receiving end supplies power, the transmitting end controller determines the It is expected that the state of the receiving end is normal. If yes, the transmitting end controller controls the driving detecting module to drive the transmitting end coil at the position of the receiving end to supply power to the receiving end; otherwise, the position of the desired receiving end of the transmitting end controller The transmitter coil state at the location is marked as "abnormal" state, and controls the drive detection module to stop driving the transmitter coil at the location where the desired receiver is located, and stops supplying power to the desired receiver.

Further, the transmitting end controller determines whether the expected receiving end state is normal or not: the transmitting end controller detects whether the transmitting end coil at the location where the desired receiving end is located has received the RxID timeout period of the maximum time of the preset time N To the RXID signal, if any, the desired receiving end state is normal; otherwise, the desired receiving end state is abnormal.

Further, before the transmitting end controller controls the driving detecting module to drive the transmitting end coil at the position of the receiving end, the transmitting end controller divides the transmitting end coil array into a plurality of positioning units, and each positioning unit includes a plurality of positioning areas. Each positioning area includes a plurality of coils; one of the plurality of coils of each positioning area is a positioning coil, and the other is a common coil; the transmitting end controller selects one positioning coil from all the positioning coils of each positioning unit As a representative positioning coil; the positioning area corresponds to the positioning coil, and the positioning unit corresponds to the representative positioning coil;

The transmitting end controller periodically detects whether the representative positioning coil of the positioning unit has a receiving end; when detecting that the representative positioning coil has a receiving end, the positioning unit corresponding to the receiving end is found from the representative positioning coil, and all the positions included in the positioning unit are found from the positioning unit. a region, all the positioning coils corresponding to the all positioning regions are found from all the located positioning regions, and the positioning coil closest to the receiving end is found from all the positioning coils; after finding the positioning coil closest to the receiving end, Find the nearest to the receiving end a positioning area corresponding to the bit coil, and finding a multi-coil array of the present invention for the transmitting end at a position of the receiving end from all the coils of the positioning area, adopting a time division multiplexing system, sequentially starting the transmitting end coil at the position of the receiving end, by transmitting end of the coil is determined whether or receiving the unique identifier can be the identity of the receiving terminal RXID desired signal to identify whether the time t _¾ desired receiving end is the receiving end, so as to achieve a multi-coil array wireless power feeding system to identify the identity of the receiving terminal The purpose is to realize a commercial application based on the identity of the receiver.

DRAWINGS

1 is a flow chart of an embodiment of a method for identifying a receiving end of a multi-coil array type wireless power supply system according to the present invention;

2 is a flow chart of another embodiment of a method for identifying a receiving end of a multi-coil array type wireless power supply system according to the present invention;

3(a) is a schematic diagram showing the state of the receiving end coil after receiving the energy received by the receiving end in the receiving end identification method of the multi-coil array type wireless power supply system according to the present invention;

FIG. 3(b) is a schematic diagram showing the state of the transmitting end coil after receiving the energy received by the receiving end in the receiving end identification method of the multi-coil array type wireless power supply system according to the present invention;

FIG. 3(c) is a simplified schematic diagram showing the state of the transmitting end coil after receiving the energy received by the receiving end in the receiving end identification method of the multi-coil array type wireless power supply system according to the present invention;

FIG. 3(d) is a timing diagram of the transmitting end identifying the receiving end when the transmitting end coil is located at the receiving end of the multi-coil array type wireless power supply system according to the present invention; In the receiving end identification method of the multi-coil array type wireless power supply system of the present invention, when the transmitting end is in the power supply state, and the transmitting end supplies power to the newly added second receiving end, the timing chart of the transmitting end coil; FIG. 3(f) is a timing diagram of the transmitting end coil when the transmitting end is in a power supply state and the transmitting end is powered by the newly added Nth receiving end in the receiving end identification method of the multi-coil array type wireless power supply system according to the present invention; FIG. 3(g) is a timing diagram of the transmitting end coil when the transmitting end is already in the power supply state and the new receiving end needs to be identified in the receiving end identification method of the multi-coil array type wireless power supply system according to the present invention; The invention is a system block diagram of a receiving end identification system of a multi-coil array type wireless power supply system.

detailed description

In order to more clearly illustrate the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, a method for identifying a receiving end of a multi-coil array type wireless power supply system, comprising: S10, a transmitting end coil at a position where a transmitting end starts a receiving end;

In step S10, the transmitting end starts at the transmitting end of the receiving end, and the transmitting end adopts a time division multiplexing system to sequentially start the transmitting end coil at the position of the receiving end.

The transmitting end adopts a time division multiplexing system to sequentially start the transmitting end coil at the position of the receiving end, including: dividing the transmitting end coil array into N groups;

Dividing the unit time of the communication channel into N time slots;

Each slot is assigned a time slot, and the transmitting end sequentially switches the communication channel to the group coil corresponding to the current time slot in which the communication channel is located in the order of the time slot, thereby starting the transmitting end at the position where the receiving end is located. Coil.

In step S10, the transmitting end starts the transmitting end coil at the position of the receiving end, transmits energy to the receiving end, and the receiving end receives the energy start. After the receiving end is started, the RXID signal with the period t ^« is sent to the transmitting end at a certain time, and the signal duration of the RxID is continuous for the signal duration t signal, and the RXID signal is periodically sent by the desired receiving end. The only one that can identify the desired receiving body The signal, including the command information and data information. Referring to FIG. 3(a), FIG. 3(a) is a schematic diagram showing the state of the receiving end coil after the receiving end receives the energy.

S20. The transmitting end determines whether the RXID signal is received within the preset time t. If yes, step S200 is performed; otherwise, step S201 is performed;

In step S20, the transmitting end determines whether the RXID signal is received within the preset time t. As described in step S10, after the receiving end is started, the signal is t signaled to the transmitting end at a certain time t _3⁄4 ^- The RXID signal is periodically transmitted, and the transmitting end receives the RXID signal through the transmitting end coil. Referring to FIG. 3(b), FIG. 3(b) is a schematic diagram showing the state of the transmitting end coil after the receiving end receives the energy. To simplify the diagram, the two signals are combined into the same picture to obtain Figure 3(c). Figure 3(c) is a simplified schematic diagram of the state of the transmitting end coil after the receiving end receives the energy.

For example, the transmitting end in the step S10 starts the transmitting end coil at the position of the receiving end, and the specific one is - the transmitting end uses the time division multiplexing system to sequentially start the transmitting end coil at the position of the receiving end, so when the receiving needs to be started, When there are more transmitting end coils at the position of the end, the transmitting end will start the transmitting end coil at the position of the receiving end in turn according to the time division multiplexing system pre-designed in the system.

The transmitting end adopts a time division multiplexing system to sequentially start the implementation of the transmitting end coil at the position of the receiving end, for example, below -

1. When the transmitting end recognizes the receiving end, when there are more transmitting end coils at the position of the receiving end that needs to be activated, the transmitting end will start the transmitting end coil at the position of the receiving end in turn according to the time sharing sharing system pre-designed in the system. For details, refer to FIG. 3(d). FIG. 3(d) is a timing diagram of the transmitting end identifying the receiving end when there are more transmitting end coils at the position of the receiving end that needs to be activated;

2. When the transmitting end is in the power supply state, when the new receiving end needs to supply power, the transmitting end will start the transmitting end coils at the position of all receiving ends according to the time sharing sharing system pre-designed in the system. See Figures 3(e) and 3(f) for details. Figure 3(e) is a timing diagram of the transmitting end coil when the transmitting end is already in the power supply state and the transmitting end is supplying the new second receiving end; as shown in the figure, the transmitting at the position where the newly added receiving end is started is activated. The end coil has the following requirements: 1. The receiving time of the signal of the newly added receiving end is in the idle interval of the communication channel; 2. The time interval between the signal of the newly added receiving end and the signal of the other receiving end closest to the distance t # _Rx ^ _3⁄4 . "Neighbor Rx minimum time interval" t nearest neighbor minimum time interval, less than "near neighbor Rx maximum time interval" t nearest neighbor maximum time interval.

Fig. 3(f) is a timing diagram of the transmitting end coil when the transmitting end is in the power supply state and the transmitting end supplies power to the newly added Nth receiving end.

3. When the transmitting end is already in the power supply state, when there is a new receiving end to be identified, the transmitting end will start the transmitting end coils at the position of all receiving ends according to the time sharing sharing system pre-designed in the system. See Fig. 3(g), Fig. 3(g) is a timing diagram of the transmitting coil when the transmitting end is already in the power supply state and there is a new receiving end to be identified.

5200. The transmitting end identifies the receiving end as a desired receiving end, and starts a transmitting end coil at a position where the receiving end is located to supply power to the receiving end;

5201. The transmitting end identifies the receiving end as a foreign object, and marks the state of the transmitting end coil at the position of the receiving end as a “foreign object” state.

The present invention is directed to a multi-coil array at the transmitting end, adopts a time division multiplexing system, and sequentially activates the transmitting end coil at the position of the receiving end, and determines whether the transmitting end coil receives the RXID signal uniquely capable of identifying the identity of the desired receiving end. To identify whether the receiving end is the intended receiving end, thereby achieving the purpose of identifying the receiving end of the multi-coil array type wireless power supply system, and realizing the commercial application based on the receiving end identity.

Referring to FIG. 2, a method for identifying a receiving end of a multi-coil array type wireless power supply system includes:

S00. The transmitting end locates the receiving end. In step S00, the transmitting end positioning the receiving end includes:

The transmitting end coil array is divided into a plurality of positioning units, each positioning unit includes a plurality of positioning areas, each positioning area includes a plurality of coils; one of several coils of each positioning area is a positioning coil, and the others are common a coil is selected from a plurality of positioning coils of each positioning unit as a representative positioning coil; the positioning area corresponds to the positioning coil, and the positioning unit corresponds to the representative positioning coil;

The transmitting end periodically detects whether the representative positioning coil of the positioning unit has a receiving end; when detecting that the representative positioning coil has a receiving end, the positioning unit corresponding to the receiving end is found from the representative positioning coil, and all the positioning areas included therein are found from the positioning unit. Finding all the positioning coils corresponding to all the positioning areas from all the found positioning areas, finding the positioning coil closest to the receiving end from all the positioning coils; finding the positioning coil closest to the receiving end, and then finding the positioning coil Describe the positioning area corresponding to the nearest positioning coil of the receiving end, and find the coil at the position of the receiving end from all the coils of the positioning area.

S10. The transmitting end starts the transmitting end coil at the position where the receiving end is located;

S200. The transmitting end identifies the receiving end as a desired receiving end, and starts a transmitting end coil at a position where the receiving end is located to supply power to the receiving end;

The transmitting end of the S20K recognizes the receiving end as a foreign object, and marks the state of the transmitting end coil at the position of the receiving end as a "foreign matter" state;

S30, the transmitting end determines whether the expected receiving end state is normal, and if yes, returns to step S200; otherwise, performs step S301;

In step S30, the transmitting end determines whether the expected receiving end state is normal or not: the transmitting end detects that the transmitting end coil at the position where the desired receiving end is located has the largest RxID timeout week at the preset time N Whether the RXID signal is received during the period, if any, the expected receiving state is normal; otherwise, the expected receiving state is abnormal.

S301. The transmitting end marks the state of the transmitting end coil at the position where the desired receiving end is located as an “abnormal” state, and stops supplying power to the desired receiving end.

In the present invention, when the transmitting end detects that the receiving end is removed, the transmitting end will stop starting all the coils at the position of the receiving end, and clear all the marking states of the coil indicating the receiving end.

In the present invention, when the transmitting end detects the removal of the foreign matter, the transmitting end will clear the "foreign matter" indication state of the transmitting end coil at the position where the foreign object is located, and update the coil state of the transmitting end system.

The invention is directed to a multi-coil array of a transmitting end, which adopts a time division multiplexing system, and sequentially activates a transmitting end coil at a position where the receiving end is located, and determines whether the transmitting end coil receives an RXID signal uniquely capable of identifying the identity of the desired receiving end. To identify whether the receiving end is the intended receiving end, thereby achieving the purpose of identifying the receiving end of the multi-coil array type wireless power supply system, and realizing the commercial application based on the receiving end identity.

Referring to FIG. 4, a multi-coil array type wireless power supply system receiving end identification system includes: a transmitting end and a receiving end.

The transmitting end comprises: an AC/DC module, a controller, a driving detecting module, a transmitting coil array and a communication module, and an output end of the AC/DC module is connected with a power input end of the driving detecting module, and a signal input end and a control of the driving detecting module The control end of the device is connected, the feedback end of the driving detection module is connected with the input end of the communication module, the control detection end of the driving detection module is connected with the transmitting end coil array, and the output end of the communication module is connected with the input end of the controller.

The transmitting end controller controls the transmitting end coil at the position where the detecting module drives the receiving end; the driving detecting module detects the signal received by the transmitting end coil at the position of the receiving end; and the driving detecting module passes the detected signal through the communication module Send to the transmitter controller; The transmitting end controller determines whether the RXID signal is received within the preset time t _iW , and if so, the transmitting end controller identifies the receiving end as the desired receiving end, and controls the driving detecting module to drive the position of the receiving end. The transmitting end coil supplies power to the receiving end; otherwise, the transmitting end controller recognizes the receiving end as a foreign object, and marks the transmitting end coil state at the position of the receiving end as a "foreign matter" state. The RXID signal is a signal that is expected to be periodically sent by the receiving end to identify the identity of the desired receiving end, and includes command information and data information.

Dividing the array of transmitting coils into N groups;

Dividing the unit time of the communication channel into N time slots;

Further, the transmitting end controller determines whether the expected receiving end state is normal or not: the transmitting end controller detects that the transmitting end coil at the position where the desired receiving end is located is the largest at the preset time N Whether the RXID signal is received during the RxID timeout period, and if so, the expected receiving state is normal; otherwise, the expected receiving state is abnormal.

The transmitting end controller periodically detects whether the representative positioning coil of the positioning unit has a receiving end; when detecting that the representative positioning coil has a receiving end, the positioning unit corresponding to the receiving end is found from the representative positioning coil, and all the positions included in the positioning unit are found from the positioning unit. a region, all the positioning coils corresponding to the all positioning regions are found from all the located positioning regions, and the positioning coil closest to the receiving end is found from all the positioning coils; after finding the positioning coil closest to the receiving end, Finding a positioning area corresponding to the positioning coil closest to the receiving end, and finding a coil at a position of the receiving end from all the coils of the positioning area.

The technical principles of the present invention have been described above in connection with specific embodiments. The descriptions are only intended to explain the principles of the invention and are not to be construed as limiting the scope of the invention. Based on the explanation herein, those skilled in the art can associate other articles of the present invention without paying creative labor. The embodiments are all within the scope of the present invention.

Claims

claims

1. A method for identifying the receiving end of a multi-coil array wireless power supply system, which is characterized by including: the transmitting end activates the transmitting end coil at the location of the receiving end;

The transmitting end determines whether the RXID signal is received within the preset time t tr^. If so, the transmitting end identifies the receiving end as the desired receiving end, and activates the transmitting end coil at the location of the receiving end to target the receiving end. To provide power; otherwise, the transmitter identifies the receiver as a foreign object, and marks the transmitter coil status at the location of the receiver as "foreign object" state;

The RXID signal is a signal periodically sent by the desired receiving end that can uniquely identify the identity of the desired receiving end, and includes instruction information and data information.

2. The multi-coil array wireless power supply system receiving end identification method according to claim 1, characterized in that the transmitting end activates the transmitting end coil at the position of the receiving end. Specifically, the transmitting end uses a time division multiplexing system to sequentially activate the receiving end. The transmitting end coil at the position of the transmitting end uses a time division multiplexing system to sequentially activate the transmitting end coil at the position of the receiving end, including:

Divide the transmitter coil array into N groups;

Divide the unit time of the communication channel into N time slots;

A time slot is allocated to each group of coils, and the transmitting end switches the communication channel to the group of coils corresponding to the current time slot where the communication channel is located in the order of the time slots, thereby starting the transmitting end at the location of the receiving end. Coil.

3. The multi-coil array wireless power supply system receiving end identification method according to claim 1, characterized in that the transmitting end identifies the receiving end as the desired receiving end and activates the transmitting end at the location of the receiving end. The coil supplies power to the receiving end, and then includes: The transmitting end determines whether the desired receiving end is in a normal state. If so, the transmitting end continues to provide power to the desired receiving end; otherwise, the transmitting end places the desired receiving end at the location of the coil. The transmitter coil status is marked as "abnormal" and the power supply to the desired receiver is stopped.

4. The multi-coil array wireless power supply system receiving end identification method according to claim 3, characterized in that the transmitting end determines whether the expected receiving end status is normal by: the transmitting end detects the location of the expected receiving end. Whether the transmitting end coil receives the RXID signal within the maximum RxID timeout period of the preset time N, if so, the expected receiving end status is normal; otherwise, the expected receiving end status is abnormal.

5. The multi-coil array wireless power supply system receiving end identification method according to claim 1, characterized in that, before the transmitting end activates the transmitting end coil at the position of the receiving end, the transmitting end further includes: Positioning, the transmitting end positioning the receiving end includes:

The transmitter coil array is divided into several positioning units. Each positioning unit includes several positioning areas. Each positioning area includes several coils. Among the several coils in each positioning area, one of them is a positioning coil and the others are ordinary. Coil; Select one positioning coil from all positioning coils of each positioning unit as the representative positioning coil; The positioning area corresponds to the positioning coil, and the positioning unit corresponds to the representative positioning coil;

The transmitting end regularly detects whether the representative positioning coil of the positioning unit has a receiving end; when it is detected that the representative positioning coil has a receiving end, it finds the positioning unit corresponding to the receiving end from the representative positioning coil, and finds all the positioning areas it includes from the positioning unit. Find all positioning coils corresponding to all the positioning areas found from all the positioning areas, and find the positioning coil closest to the receiving end from all the positioning coils; After finding the positioning coil closest to the receiving end, find all the positioning coils. Describe the positioning area corresponding to the positioning coil closest to the receiving end, and find the coil at the position of the receiving end from all the coils in the positioning area.

6. A multi-coil array wireless power supply system receiving end identification system, characterized in that it includes: a transmitting end and a receiving end, and the transmitting end includes: AC/DC module, controller, drive detection module, transmitting end coil array and communication module, the output end of the AC/DC module is connected to the power input end of the drive detection module, the signal input end of the drive detection module is connected to the control end of the controller, and the feedback end of the drive detection module is connected to The input end of the communication module is connected, the control detection end of the drive detection module is connected to the transmitter coil array, the output end of the communication module is connected to the input end of the controller, where

The transmitter controller controls the drive detection module to drive the transmitter coil at the position of the receiving end; drives the detection module to detect the signal received by the transmitter coil at the position of the receiving end; drives the detection module to pass the detected signal through the communication module Sent to the transmitting end controller; The transmitting end controller determines whether the RXID signal is received within the preset time t tr^ _w . If so, the transmitting end controller identifies the receiving end as the expected receiving end and controls the drive detection. The module drives the transmitter coil at the location of the receiver and supplies power to the receiver; otherwise, the transmitter controller identifies the receiver as a foreign object and marks the status of the transmitter coil at the location of the receiver as ""ForeignObject" state, the RXID signal is a signal periodically sent by the desired receiving end that can uniquely identify the identity of the desired receiving end, and includes instruction information and data information.

7. The multi-coil array wireless power supply system receiving end identification system according to claim 6, characterized in that the transmitting end controller uses a time division multiplexing system to sequentially activate the transmitting end coils at the location of the receiving end, and the transmitting end The controller uses a time-division multiplexing system to sequentially activate the transmitter coil at the location of the receiver, including:

Divide the transmitter coil array into N groups;

Divide the unit time of the communication channel into N time slots;

Each group of coils is assigned a time slot, and the transmitting end switches the communication channel to the group of coils corresponding to the current time slot where the communication channel is located in the order of the time slots, thereby starting the transmitting end at the location of the receiving end. Coil.

8. The multi-coil array wireless power supply system receiving end identification system according to claim 6, characterized in that the transmitting end controller identifies the receiving end as the desired receiving end, and controls the driving detection module to drive the receiving end. The transmitter coil at the position, after powering the receiver, the transmitter controls The controller determines whether the expected receiving end status is normal. If so, the transmitting end controller controls the drive detection module to drive the transmitting end coil at the location of the receiving end and supplies power to the receiving end; otherwise, the transmitting end controller controls the expected receiving end state. The status of the transmitting end coil at the location of the receiving end is marked as "abnormal", and the drive detection module is controlled to stop driving the transmitting end coil at the location of the desired receiving end and stop supplying power to the desired receiving end.

9. The multi-coil array wireless power supply system receiving end identification system according to claim 8, characterized in that, the transmitting end controller determines whether the expected receiving end status is normal: the transmitting end controller detects the expected receiving end. Whether the transmitter coil at the position of the terminal receives the RXID signal within the RxID timeout period with the maximum preset time N. If so, the expected receiving end status is normal; otherwise, the expected receiving end status is abnormal.

10. The multi-coil array wireless power supply system receiving end identification system according to claim 6, characterized in that, before the transmitting end controller controls the driving detection module to drive the transmitting end coil at the position of the receiving end, the transmitting end controller The transmitter coil array is divided into several positioning units. Each positioning unit includes several positioning areas. Each positioning area includes several coils. Among the several coils in each positioning area, one of them is a positioning coil, and the others are. Ordinary coil; The transmitter controller selects one positioning coil from all positioning coils of each positioning unit as the representative positioning coil; the positioning area corresponds to the positioning coil, and the positioning unit corresponds to the representative positioning coil;

The transmitter controller regularly detects whether the representative positioning coil of the positioning unit has a receiving end; when it is detected that the representative positioning coil has a receiving end, it finds the positioning unit corresponding to the receiving end from the representative positioning coil, and finds all the positioning included in it from the positioning unit. area, find all positioning coils corresponding to all positioning areas from all the positioning areas found, find the positioning coil closest to the receiving end from all the positioning coils; after finding the positioning coil closest to the receiving end, Find the positioning area corresponding to the positioning coil closest to the receiving end, and find the coil at the position of the receiving end from all the coils in the positioning area.