KR102095498B1 - Wireless charging system and method in the vehicle - Google Patents

Abstract

The present invention discloses an in-vehicle wireless charging system and method capable of simultaneously wirelessly charging a plurality of portable electronic devices in a vehicle. The present invention installs a wireless charging module in a plurality of locations in a vehicle, detects a user's charging target portable device using BLE communication, and then wirelessly transmits the corresponding charging target portable device through a wireless charging module in the closest position. In addition to being able to charge by transmitting power, each of the plurality of wireless charging modules can charge a portable device, thereby performing charging by connecting a cable to the portable device one by one within a vehicle of the prior art, or one portable Solve the problem that only the device can be wirelessly charged.

Description

Wireless charging system and method in the vehicle

The present invention relates to an in-vehicle wireless charging system and method, and more particularly, to an in-vehicle wireless charging system and method capable of simultaneously wirelessly charging a plurality of portable electronic devices in a vehicle.

As the use of smartphones increases, the frequency of use of various types of portable electronic devices such as tablets, smart watches, and Bluetooth earphones has also increased. As these portable electronic products using lithium ion batteries increase, the importance of battery charging is increasing.

Such portable electronic devices are not only used for natural purposes such as phone calls, but also in automobiles, such as navigation and playing music in conjunction with a speaker of a vehicle, have greatly increased, and thus the need for charging is greatly increased.

In particular, due to the nature of the vehicle, the procedure in which the driver connects the smartphone to the wired cable is cumbersome, and the cable is cluttered inside the vehicle may interfere with the driver. Due to this special environment, the needs of the wireless charger mounted on the vehicle are increasing more than the general living space. However, the existing wireless charger can only charge one smartphone, making it difficult to efficiently use it while the vehicle is moving.

Accordingly, there is a need for an in-vehicle wireless charging system and method capable of simultaneously wirelessly charging a plurality of portable electronic devices in a vehicle.

The problem to be solved by the present invention is to provide a wireless charging system and method in a vehicle capable of charging a plurality of portable electronic devices in a vehicle.

An in-vehicle wireless charging system according to a preferred embodiment of the present invention for solving the above-described problem includes: a boost converter that boosts and outputs power supplied from a vehicle battery; A power converter converting the boosted power into AC power; It is installed at a plurality of locations in the vehicle, and performs communication with a wireless power receiving module included in an adjacent charging target device to exchange charging parameters used for wireless charging, and wirelessly converts AC power input from the power converter. A plurality of wireless charging modules transmitting; And a wireless charging module adjacent to the charging target device according to the status message of the charging target device received from the wireless charging module, and the power conversion unit to the wireless charging module adjacent to the charging target device, from the wireless power receiving module. And a wireless charging MCU that controls to supply AC power corresponding to the power category information included in the received charging parameter.

In addition, the wireless charging MCU, to control the booster converter and the power converter to transmit the maximum power corresponding to the power category information to the charging target device connected to the plurality of wireless charging module, the plurality of wireless charging module When the maximum power cannot be transmitted to all connected charging target devices, power may be distributed at a ratio of the maximum power according to the power category received from each charging target device.

In addition, the wireless charging module, a transmitting antenna for transmitting AC power wirelessly; A power transmission unit that outputs AC power input from the power conversion unit to the transmission antenna; And performing communication with the wireless power receiving module included in the charging target device, receiving a status message and charging parameters of the wireless power receiving module, transmitting the wireless message to the wireless charging MCU, and receiving the charging parameter received from the wireless charging MCU. It may include a BLE communication unit for transmitting to the wireless power receiving module.

In addition, the wireless power receiving module includes: a receiving antenna for wirelessly receiving and outputting AC power from the wireless charging module; A rectifying unit rectifying and outputting AC power input from the receiving antenna; A DC / DC converter that charges or boosts the DC power input from the rectifying unit to charge a battery inside the device to be charged; LDO step-down voltage of the power input from the DC / DC converter; A BLE communication unit driven by the power input from the LDO to perform communication with the wireless charging module; And through the BLE communication unit, transmit the status message and charging parameters to the wireless charging module, receive charging parameters from the wireless charging module, and when wireless charging is started, the voltage of the wireless power received from the wireless charging module. And an MCU that transmits a charging parameter indicating a charging situation including a current.

In addition, the in-vehicle wireless charging system according to a preferred embodiment of the present invention further includes a CAN communication unit connected to a CAN bus of the vehicle to enable the wireless charging MCU to perform CAN communication with a control device and a display in the vehicle. When the wireless power receiving module requests authentication to the wireless charging module, the wireless charging MCU generates an authentication code, transmits it through the CAN communication unit, displays it on a display installed in the vehicle, and receives it from the wireless power receiving module. If the authenticated authentication password matches the authentication password, the device to be charged can be authenticated.

On the other hand, according to a preferred embodiment of the present invention for solving the above-mentioned problems, as a wireless charging method performed in the in-vehicle wireless charging system, (a) low-power beacon in a plurality of wireless charging modules respectively installed in a plurality of locations in the vehicle Generating a signal; (b) receiving a beacon signal generated from an adjacent wireless charging module among a plurality of wireless charging modules in a wireless power receiving module included in a device to be charged, and transmitting its own status message; (c) the wireless charging module receiving the status message sends the status message to the wireless charging MCU included in the in-vehicle wireless charging system, so that the wireless charging MCU checks the wireless charging module adjacent to the device to be charged. step; And (d) the wireless charging MCU exchanges the charging target device and charging parameters with each other through the checked wireless charging module, and the wireless power receiving module of the charging target device through the checked wireless charging module according to the charging parameter. And transmitting wireless power.

In addition, in step (d), the charging parameter received from the wireless power receiving module of the device to be charged includes power category information of the device to be charged, and the wireless charging MCU is configured to receive the wireless charging module through the identified wireless charging module. The maximum power corresponding to the power category information may be transmitted to the charging target device.

In addition, in step (d), when the plurality of wireless charging modules transmit wireless power to a plurality of charging target devices, when all of the maximum power cannot be transmitted to the plurality of charging target devices, each charging target The power may be wirelessly transmitted by distributing power at a ratio of the maximum power according to the power category received from the device.

In addition, prior to step (a), the charging target device requests authentication to the wireless charging module, and the wireless charging module transmits an authentication request to the wireless charging MCU; Generating, by the wireless charging MCU, an authentication code and displaying the vehicle's display through CAN communication; The charging target device receiving the displayed authentication password from a user, transmitting the authentication password to the wireless charging module, and transmitting the authentication password received by the wireless charging module to the wireless charging MCU; And comparing the authentication password received from the wireless charging module with the authentication password displayed on the vehicle display and performing authentication when the wireless charging MCU matches, wherein the steps (a) to (d) include It can only be performed for certified charging devices.

The present invention installs a wireless charging module in a plurality of locations in a vehicle, detects a user's charging target portable device using BLE communication, and then wirelessly transmits the corresponding charging target portable device through a wireless charging module in the closest position. In addition to being able to charge by transmitting power, each of the plurality of wireless charging modules can charge a portable device, thereby performing charging by connecting a cable to the portable device one by one within a vehicle of the prior art, or one portable Solve the problem that only the device can be wirelessly charged.

1 is a view showing the overall configuration of a wireless charging system in a vehicle according to a preferred embodiment of the present invention.
2 is a flowchart illustrating an authentication process between an in-vehicle wireless charging system and a charging target device according to a preferred embodiment of the present invention.
3 is a flowchart illustrating a process of performing wireless charging of a charging target device in an in-vehicle wireless charging system according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view showing the overall configuration of a wireless charging system in a vehicle according to a preferred embodiment of the present invention.

1, the in-vehicle wireless charging system according to a preferred embodiment of the present invention receives the battery power 210 from the vehicle 200, and each component and wireless charging modules 170-1 to 170- Wireless power is transmitted to a plurality of devices to be charged through N). At this time, the plurality of wireless charging modules 170-1 to 170-N may be respectively installed in a plurality of positions of the vehicle (eg, front and rear seat cup holders, door handles of the vehicle, and the like).

Hereinafter, the function of each component of the in-vehicle wireless charging system according to the preferred embodiment of the present invention will be described. First, the in-vehicle wireless charging system according to the preferred embodiment of the present invention is a CAN communication unit 150. , LDO (Low DropOut) 140, a boost converter 110, a power converter 120, a wireless charging MCU 160, and a plurality of wireless charging modules (170-1 ~ 170-N).

The CAN communication unit 150 is connected to the CAN bus of the vehicle to enable the wireless charging MCU 160 to perform CAN communication with the control devices and displays in the vehicle, and in the authentication process, the authentication password from the wireless charging MCU 160 Is input, and transmitted through the CAN bus 230 to display the authentication password through the vehicle display.

The LDO 140 step-downs the power input from the vehicle's IG3 power supply 220 or the boost converter 110 and supplies it to the CAN communication unit 150 and the wireless charging MCU 160 to drive the corresponding components.

The boost converter 110 boosts the power input from the vehicle battery and outputs it to the power converter 120.

The power converter 120 amplifies the power input from the boost converter 110, converts it into AC power, processes the conversion process necessary to wirelessly transmit the battery power 210, such as performing impedance matching, to each Output to the power transmission unit 171 of the wireless charging module (170-1).

The wireless charging MCU 160 communicates with the BLE communication unit 172 included in each wireless charging module 170-1 to generate an authentication password when an authentication request message is received from the wireless charging module 170-1. It is output through the display of the vehicle through the CAN communication unit 150, and authentication is allowed when the authentication password is received through the BLE communication unit 172 from the wireless charging target device.

In addition, when authentication is permitted, it is determined whether a wireless charging module 170-1 is arranged adjacent to a wireless charging module through the BLE communication unit 172, and receives power category information of the charging device from the charging device. In addition, the boost converter 110 and the power converter 120 are controlled according to power category information to perform control for supplying power to a plurality of charging target devices. That is, when there is only one wireless charging target device, wireless power is transmitted to the maximum output that the corresponding wireless charging target device can receive, and when a plurality of charging target devices request charging, the power conversion unit 120 Wireless charging modules 170-1 to control the boost converter 110 and the power converter 120 to receive power from the maximum power that can be provided and to receive power from the power converter 120 170-N).

The plurality of wireless charging modules 170-1 to 170-N perform BLE communication with a charging target device adjacent to them, perform authentication of the charging target device, receive charging parameters of the charging target device from the charging target device, and , It transmits the charging parameters of the wireless charging system to the device to be charged, and wirelessly charges the device to be charged by transmitting wireless power to the device to be charged.

Each of the plurality of wireless charging modules 170-1 to 170-N includes a BLE communication unit 172, a power transmission unit 171, and a transmission antenna (Tx Antenna) 173.

Hereinafter, a case where a portable electronic device equipped with the wireless power receiving module 1 310 through the wireless charging module 1 170-1 performs wireless charging is exemplarily described.

The wireless charging module 170-1 communicates with the portable electronic device to be charged (hereinafter abbreviated as "charging target device") 310 through the BLE communication unit 172, and the authentication procedure of the charging target device, which will be described later. And exchange status messages and charging parameters for transmitting wireless power.

The power transmission unit 171 of the wireless charging module 170-1 outputs AC power received from the power conversion unit 120 to the transmission antenna 173 to transmit wireless power.

Meanwhile, the wireless power receiving module 310 included in the device to be charged includes a receiving antenna 311 (Rx Antenna), a rectifying unit 312, a DC / DC converter 313, an LDO 314, and a BLE communication unit 315, And MCU 316.

The receiving antenna (Rx Antenna) 311 receives the wireless power signal from the transmitting antenna 173 and outputs it to the rectifying unit 312, and the rectifying unit 312 rectifies the AC wireless power received from the receiving antenna 311 to DC The power is output to the DC / DC converter 313.

The DC / DC converter 313 boosts or step-downs the voltage of the DC power received from the rectifying unit 312 to output it to the internal battery 400 of the device to be charged to charge the battery 400, while partially charging LDO ( 140).

The LDO 140 step-downs the voltage of the power received from the DC / DC converter 313 to an appropriate level to provide a driving voltage to the MCU 316 and the BLE communication unit 315.

The BLE communication unit 315 communicates with the BLE communication unit 172 included in the wireless charging module 170-1 to perform an authentication procedure of a charging target device, which will be described later, and status messages and charging parameters for wireless charging. Exchange them.

The MCU 316 of the wireless power receiving module 310 transmits an authentication request message to the wireless charging module 170-1 through the BLE communication unit 315, and when an authentication password is input from the user, the BLE communication unit 315 And transmit to the wireless charging module 170-1.

When authentication is completed, the wireless power receiving module 310 receives the beacon signal from the wireless charging module 170-1 and transmits a status message, and then exchanges the wireless charging module 170-1 with charging parameters to wirelessly Charging starts, and while wireless charging is in progress, transmits its own charging parameters to the wireless charging module 170-1.

So far, a wireless charging system in a vehicle according to a preferred embodiment of the present invention has been briefly described. Hereinafter, the wireless charging system 100 and the wireless charging method performed in the system 100 will be described with reference to FIGS. 2 and 3.

2 is a flowchart illustrating an authentication process between a wireless charging system in a vehicle and a portable electronic device to be charged according to a preferred embodiment of the present invention.

Referring to Figure 2, according to a preferred embodiment of the present invention, a charging target device, such as a smartphone, a smart pad, and a laptop, to perform wireless charging in a vehicle can perform authentication for wireless charging of the present invention in advance. When the application program (hereinafter referred to as "app") is installed, and whenever wireless charging is performed, or when performing the first wireless charging, the wireless charging system of the present invention installed in the vehicle must be authenticated through the app.

Looking at the authentication process, first, in the state in which the app for using the service of the present invention is installed on the device to be charged to be charged, when the user runs the app and requests authentication, the MCU of the wireless power receiving module 310 ( 316 transmits an authentication request signal including the identification information (or identification information of the device to be charged) of the wireless power receiving module 310 through the BLE communication unit 315, and this signal is the wireless charging module ( It is received through the BLE communication unit 172 of 170-1) and transmitted to the wireless charging MCU 160 (S211).

The wireless charging MCU 160 receives the authentication request signal, generates an authentication code corresponding to the identification information, transmits it to the vehicle's main controller (not shown) through CAN communication (S213), and the vehicle's main controller Displays the authentication password through the display of the vehicle (S215).

Then, the user checks the authentication password displayed on the display, enters the authentication password through the app installed on the device to be charged (S221), and the MCU 316 of the device to be charged is BLE with the identification information as described above. Transmitting through the communication unit 315, the BLE communication unit 172 of the wireless charging module 170-1 closest to the device to be charged receives the authentication password and identification information and transmits it to the wireless charging MCU 160 (S223). .

The wireless charging MCU 160 checks whether the received authentication password and identification information match each other with the authentication password and identification information stored therein (S225), and if they match, charges the authentication allowance message through the BLE communication unit 172. It transmits to the target device (S227).

The authentication process is terminated by performing steps S211 to S227 described above, and thereafter, the wireless charging process is performed (S230). Here, the above-described authentication process may be performed each time each wireless charging is performed, the wireless charging is performed only once for the first time, and the wireless charging MCU 160 stores the identification information of the device to be charged therein in the subsequent wireless charging process. It may be omitted. In addition, the wireless charging process (S230) can be performed only for the authorized charging target device.

3 is a flowchart illustrating a process of performing wireless charging of a charging target device in an in-vehicle wireless charging system according to a preferred embodiment of the present invention.

A wireless charging process (corresponding to step S230 of FIG. 2) according to a preferred embodiment of the present invention will be described with reference to FIG. 3.

First, when the authentication process is ended (or when the previously authenticated identification information of the charging target device is received), the user may charge the charging target device in a plurality of in-vehicles in which the transmitting antenna 173 of the wireless charging module 170-1 is installed. Positioned at or near any one of the positions, the plurality of wireless charging modules 170-1 generate low-power beacon signals of a short period (about 500 ms) through the BLE communication unit 172 (S311).

The BLE communication unit 315 of the wireless power receiving module 310 receiving the low power beacon signal outputs it to the MCU 316, and the MCU 316 sends its status message (reception module status message) to the BLE communication unit 315. It is transmitted to the wireless charging module 170-1 through (S313). At this time, the transmitted status message may be a Bluetooth Advertisement message indicating that the wireless power receiving module 310 is a normal receiving module having a BLE communication unit 315.

The wireless charging MCU 316 identifies the BLE communication unit 172 from which a status message has been received among a plurality of wireless charging modules, and checks the wireless charging module 170-1 in which the device to be charged currently requesting charging is located. The process of performing only through the identified wireless charging module (170-1) (S315).

Thereafter, the wireless charging MCU 316 transmits its charging parameters to the wireless power receiving module 310 through the BLE communication unit 172 of the identified wireless charging module 170-1 (S321), and receives it The MCU 316 of the wireless power receiving module 310 transmits its charging parameter to the wireless charging module 170-1 through the BLE communication unit 315 (S323).

The charging parameters that the wireless charging module 170-1 and the wireless power receiving module 310 exchange with each other are the maximum possible that the H / W information, F / W information, protocol version, and wireless charging module 170-1 can transmit. The charging power, the power category of the wireless charging module 170-1, and the like are included as basic information.

Each of the wireless charging module 170-1 and the wireless power receiving module 310 examines the received charging parameters to determine whether the wireless charging methods are mutually compatible (S331), and when they are not mutually compatible, the wireless charging module 170 -1) enters the power saving mode (S333), and the wireless power receiving module 310 ends the wireless charging procedure (S335).

Meanwhile, the MCU 316 of the wireless power receiving module 310 confirming that the wireless charging methods are mutually compatible, connect through the BLE communication unit 315 until a connection allowance message is received from the wireless charging module 170-1. The request message is transmitted at regular time intervals (S341), and the wireless charging MCU 160 receiving the message through the BLE communication unit 172 transmits a connection permission message to the wireless power receiving module 310 (S343).

The wireless power receiving module 310 receiving the connection permission message stops transmitting the connection request message and is connected to the wireless charging module 170-1, and the wireless charging module 170-1 wirelessly transmits through the transmitting antenna 173 Transmitting power, the wireless power receiving module 310 receives wireless power through the receiving antenna 311 (S350).

The wireless power receiving module 310 receiving the wireless power from the receiving antenna 311 converts AC wireless power into direct current in the rectifying unit 312, and boosts the voltage in the DC / DC converter 313 to the battery 400. Charging is performed by outputting (S360).

In the process of wireless charging, the wireless power receiving module 310 continuously transmits charging parameters indicating the current charging state to the wireless charging module 170-1 (S371 to S373), and the wireless charging module 170-1. May adjust the charging power according to the received charging parameters.

In other words, in step S350, the wireless charging MCU 160 adjusts and transmits wireless power according to the charging parameter received from the device to be charged, for example, the wireless charging MCU 160 transmits the wireless power receiving module 310 The size of the wireless power transmitted through the transmit antenna 173 is controlled by controlling the boost converter 110 and the power converter 120 according to the category of.

That is, in step S323 described above, the wireless power receiving module 310 transmits the power category to which it belongs to the wireless charging module 170-1 as charging parameter information, and the wireless charging module 170 -1) controls the boost converter 110 and the power converter 120 to transmit the amount of power corresponding to the category received from the wireless power receiving module 310 to the wireless power receiving module 310.

category Maximum power Devices to be charged One 3.5W Feature phone 2 6.5W Smartphone 3 13W Tablet pc 4 25W Mini laptop pc 5 37.5W Laptop PC

In a preferred embodiment of the present invention, the wireless charging module 170-1 is information about how much power is currently being transmitted from the wireless power receiving module 310 (voltage received from the wireless power receiving module 310) , Current, internal temperature, etc.), and gradually increase the amount of current so as to satisfy the originally required maximum amount of power as summarized in the above table. However, in a preferred embodiment of the present invention, in order to secure the stability of wireless charging, the current amount may be increased in 1% increments up to 95% of the maximum current amount.

In addition, in the case of performing wireless charging with another charging target device in another wireless charging module 170-1 during the above-described wireless charging process, when the maximum current amount can be provided to all wireless charging modules 170-1 Provides maximum current, but otherwise balances wireless charging through voltage distribution. At this time, the power distribution method may be distributed at a ratio of the maximum power according to the power category, or may be distributed according to the remaining time required for charging.

Meanwhile, when an overcurrent or an overvoltage occurs in the wireless power receiving module 310 during wireless charging, the wireless power receiving module 310 transmits a charging error message to the wireless charging module 170-1 (S381) ), The wireless charging MCU 160 receiving the charging error message stops the wireless charging by controlling the power conversion unit 120 to cut off the power supply to the corresponding wireless charging module 170-1 (S383).

So far, the present invention has been focused on the preferred embodiments. Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in terms of explanation, not limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent range should be interpreted as being included in the present invention.

100: wireless charging system in the vehicle
110: boost converter 120: power converter
140: LDO 150: CAN communication unit
160: wireless charging MCU 170-1 ~ 170-N: wireless charging module
171: power transmission unit 172: BLE communication unit
173: transmit antenna
200: vehicle
210: vehicle battery 220: IG3 power
230: CAN bus
310,320: wireless power receiving module
311: receiving antenna 312: rectifier
313: DC / DC converter 314: LDO
316: MCU

Claims (9)

A boost converter that boosts and outputs power supplied from a vehicle battery;
A power converter converting the boosted power into AC power;
It is installed at a plurality of locations in the vehicle, and performs communication with a wireless power receiving module included in an adjacent charging target device to exchange charging parameters used for wireless charging, and wirelessly converts AC power input from the power converter. A plurality of wireless charging modules transmitting; And
According to the status message of the charging target device received from the wireless charging module, the charging target device checks the adjacent wireless charging module, and the power conversion unit receives the wireless charging module adjacent to the charging target device from the wireless power receiving module. And a wireless charging MCU that controls to supply AC power corresponding to the power category information included in the charging parameter.
The wireless charging MCU
The boost converter and the power converter are controlled to transmit the maximum power corresponding to the power category information to the charging target device connected to the plurality of wireless charging modules, but the maximum of all charging target devices connected to the plurality of wireless charging modules When power cannot be transmitted at the same time, the power to be wirelessly transmitted to each charging target device at the ratio of the maximum power according to the power category received from each charging target device is distributed, and the power converter converts the plurality of wireless charging modules Control the power converter to output the power distributed to each at the same time,
A CAN communication unit connected to the CAN bus of the vehicle to further enable the wireless charging MCU to perform CAN communication with a control device and a display in the vehicle,
The wireless charging MCU, when the wireless power receiving module requests authentication to the wireless charging module, generates an authentication code, transmits it through the CAN communication unit, displays it on a display installed in the vehicle, and receives it from the wireless power receiving module. In-vehicle wireless charging system, characterized in that when the authentication password matches the authentication password, the device to be charged is authenticated. delete The method of claim 1, wherein the wireless charging module
A transmitting antenna for transmitting AC power wirelessly;
A power transmission unit that outputs AC power input from the power conversion unit to the transmission antenna; And
By performing communication with the wireless power receiving module included in the device to be charged, the status message and charging parameters of the wireless power receiving module are received and transmitted to the wireless charging MCU, and the charging parameters received from the wireless charging MCU are In-vehicle wireless charging system, characterized in that it comprises a BLE communication unit for transmitting to the wireless power receiving module. The method of claim 3, wherein the wireless power receiving module
A receiving antenna for wirelessly receiving and outputting AC power from the wireless charging module;
A rectifying unit rectifying and outputting AC power input from the receiving antenna;
A DC / DC converter that charges or boosts the DC power input from the rectifying unit to charge a battery inside the device to be charged;
A low dropout (LDO) step-down voltage of power input from the DC / DC converter;
A BLE communication unit driven by the power input from the LDO to perform communication with the wireless charging module; And
Through the BLE communication unit, the status message and charging parameters are transmitted to the wireless charging module, the charging parameters are received from the wireless charging module, and when wireless charging is started, the voltage of the wireless power received from the wireless charging module and In-vehicle wireless charging system, characterized in that it comprises an MCU that transmits a charging parameter indicating the charging situation including the current. delete A wireless charging method performed in an in-vehicle wireless charging system,
(a) generating low-power beacon signals from a plurality of wireless charging modules respectively installed at a plurality of locations in the vehicle;
(b) receiving a beacon signal generated from an adjacent wireless charging module among a plurality of wireless charging modules in a wireless power receiving module included in a device to be charged, and transmitting its own status message;
(c) the wireless charging module receiving the status message sends the status message to the wireless charging MCU included in the in-vehicle wireless charging system, so that the wireless charging MCU checks the wireless charging module adjacent to the device to be charged. step; And
(d) The wireless charging MCU exchanges the charging target device and charging parameters with each other through the checked wireless charging module, and through the checked wireless charging module to the wireless power receiving module of the charging target device according to the charging parameter. Transmitting wireless power;

In step (d) above
The charging parameter received from the wireless power receiving module of the charging target device includes power category information of the charging target device,
The wireless charging MCU transmits the maximum power corresponding to the power category information to the charging target device through the checked wireless charging module,
When the plurality of wireless charging modules transmit wireless power to a plurality of charging target devices, and when all the maximum power cannot be simultaneously transmitted to the plurality of charging target devices, according to the power category received from each charging target device At the same time, the power to be wirelessly transmitted is distributed to the devices to be charged at the rate of maximum power, and wirelessly transmitted.
Before step (a)
A charging target device requesting authentication to the wireless charging module, and the wireless charging module transmitting an authentication request to the wireless charging MCU;
Generating, by the wireless charging MCU, an authentication code and displaying the vehicle's display through CAN communication;
The charging target device receiving the displayed authentication password from a user, transmitting the authentication password to the wireless charging module, and transmitting the authentication password received by the wireless charging module to the wireless charging MCU; And
The wireless charging MCU further comprises the step of performing authentication when the authentication password received from the wireless charging module matches the authentication password displayed on the vehicle display and matches.
The step (a) to (d) is a wireless charging method in-vehicle characterized in that it is performed only for the device to be charged. delete delete delete

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