KR102159362B1 - Interface for wireless power transmission device - Google Patents

Abstract

In the power transmission device installed in the vehicle for charging the vehicle according to the present invention, a user interface module for inputting a set charging time; A display device displaying a user interface for inputting a charging start request; And when the preset charging time is input from the user interface module, transmitting a charging start command for charging the vehicle at the preset charging time to a power transmission module installed outside the vehicle, and charging the charging from the display device. When a start request is input, a power reception module for transmitting the charging start command to the power transmission module before the preset charging time, wherein the power reception module includes, in order to start charging of the vehicle, communication state setting information, Information indicating a standby state of the power transmission module and information indicating a normal state of the power transmission module are received from the power transmission module, information indicating a charge start possible state and a state value of the power receiving module are transmitted to the power transmission module, and the The display device displays charging progress status information including a remaining time compared to full weight and status information of the power transmission module and the power reception module.

Description

Interface of wireless power transmission device {INTERFACE FOR WIRELESS POWER TRANSMISSION DEVICE}

The present invention relates to a user interface of a vehicle power transmission device, and more particularly, provides an interface between a power reception module for wireless power transmission and a user, and data communication between the power reception module and the interface follows the communication protocol of the present invention. Thus, the present invention relates to an interface of a wireless power transmission device for easily charging a high voltage battery vehicle by a user and a charging method using the same.

Currently, automobile manufacturers in each country are developing vehicles using high voltage batteries, and accordingly, various technologies for charging vehicles using the high voltage batteries are being studied. In particular, a technology for wirelessly charging a vehicle using a high-voltage battery is being studied internationally and a technical standard is being established. The technology for wirelessly charging a vehicle using a high-voltage battery, which is currently discussed internationally, is being studied as follows.

1 is a conceptual diagram showing a wireless power transmission device according to the prior art, Figure 2 is a block diagram showing a wireless power transmission device according to the prior art, and Figure 3 is data transmission and reception between a transmission module, a power receiving module and a BMS according to the prior art It is a block diagram showing.

1 to 3, a vehicle wireless power transmission device 1 includes a transmission module 10 that switches a transmission coil by receiving an AC 220V voltage on the ground, and a transmission that transfers energy of the transmission module to the power receiving module through resonance. It consists of a /receiving pickup coil 20, a power receiving module 30 for switching the received energy to match the high voltage battery of the vehicle, and a battery management system (BMS) 40.

The power transmission module 10 installed on the floor in the road or parking lot and the power reception module 30 mounted on the lower part of the vehicle perform wireless data communication according to a communication protocol, thereby performing wireless charging start and wireless charging completion operations.

More specifically, in the wireless data communication between the power transmission module 10 and the power reception module 30, the information provided by the power transmission module 10 to the power reception module 30 refers to the communication protocols of Tables 1 to 4 below. Follows.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX1 CF_COMMUCATION_SET

100ms
0
0 One

Transmission module

Power receiving module Communication status setup
(Communication start) CF_POLLING STATE One One Message for periodic monitoring of power receiving module status CR_ID_CHK 2 16 ABCDE ID confirmation message CR_CHARGER_NUM_CHK 4 32 1234 Charger number confirmation message CR_CUR_FAULT_CHK 6 48 1011 Current fault information confirmation message CAR_NUM 1s 7 56 0~255 Vehicle identification number

Here, XX1 is information transmitted by the power transmission module, and is data regarding a communication status between the power transmission module and the power reception module, a power reception module confirmation message, vehicle information, and the like.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX2 CF_CONTROL_START

100ms 0 0 One

Transmission module

Power receiving module Start wireless charging CR_TX_STATE One 8 0~4 0: normal, 1: abnormal,
2: standby, 3: power transmission
4: Transmission module status value transmission CR_RX_STATE 2 16 0~4 0: normal, 1: abnormal,
2: standby, 3: power transmission
4: Request for transmission module status value CR_TX_FAULT 4 32 1111 Transmission module Colt status message CR_RX_FAULT 6 48 1011 Transmission module Colt status message

Here, XX2 is information transmitted by the power transmission module, and is data related to charging progress status information.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX3 BMS_INFO_REQ

100ms 0 0 One

Transmission module

Power receiving module BMS information request BMS_INFO_RESP_ACK One
8 One BMS information normal response message BMS_INFOR_RESP_NAK 9 One BMS information abnormal negative answer message RX_CHAR_INFO_REQ 2 16 One Request for receiving module information RX_CHAR_INFO_RESP_ACK 3
24 One Receiving module information normal response message RX_CAR_INFO_RESP_NAK 25 One Receiving module information abnormal response message

Here, XX3 is information transmitted by the power transmission module, and is data related to a BMS (Battery Management System) and a request for information related to a power reception module.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT

XX4 CR_TX_AC_VOL

100ms 0 0 0~500

Transmission module

Power receiving module Transmission module input voltage CR_TX_AC_CUR One 8 0-50 Transmission module input current CR_TX_PSFB_IN_CUR 2 16 0-50 Transmission module full bridge input voltage CR_TX_PSFB_IN_VOL 3 24 0~500 Transmission module full bridge input current CR_TX_TEMP 5 40 -40~150 Transmission module temperature

Here, XX4 is information transmitted by the transmission module, and is data related to transmission module information, etc. In addition, in wireless data communication between the transmission module 10 and the transmission module 30, the transmission module 30 is The information provided by 10) follows the communication protocols in Tables 5 to 8 below.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX1 CF_CONTROLLABLE

100ms
0 0 One

Power receiving module

Transmission module Wireless charging start available status information message CF_COMMUNICATION_OK One One Communication status is normal CF_RESP_ACK 2 One Normal response message CF_RESP_NAK 3 One Abnormal response message CR_TX_STATE One 8 0~4 0: normal, 1: abnormal
2; Standby, 3: power transmission
4: Transmission module status value transmission CR_RX_STATE 2 16 0~4 0: normal, 1: abnormal
2; Standby, 3: power transmission
4: Transmission module status value transmission CR_TX_FAULT 4 32 1111 Transmission module fault status message CR_RX_FAULT 6 48 1011 Receiving module fault status message

Here, XX1 is information transmitted by the power receiving module, and is data related to a communication state between the power transmitting module and the power receiving module.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XX2 BMS_CUR_INFOR
100ms 0 8 0~20
Power receiving module
Transmission module BMS control current message BMS_VOL_INFO 2 16 0~500 BMS control voltage message BMS_FAULT_STATE 4 32 1011 BMS fault information message BMS_TEMP 6 48 -40~150 BMS temperature message

Here, XX2 is information transmitted by the power receiving module, and is data related to BMS (Battery Management System) information and the like.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT

XX3 CR_RX_DC_VOL
100ms One 8 0~500

Power receiving module

Transmission module Receiving module output voltage message CR_RX_DC_CUR 2 16 0-50 Receiving module output current message CR_RX_TEMP 4 32 -40~150 Receiving module temperature message

Here, XX3 is information transmitted from the power receiving module, and is data related to information related to the power receiving module.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT

XX4 CR_ID_CHK
100ms 2 16 ABCDE

Power receiving module

Transmission module ID confirmation message CR_CHARGER_NUM_CHK 4 32 1234 Charger number confirmation message CR_CUR_FAULT_CHK 6 48 1011 Current fault information confirmation message CAR_NUM 1s 7 56 0~255 Vehicle identification number

Here, XX4 is information transmitted from the power receiving module, and is data related to vehicle information and ID confirmation.

The power receiving module 30 and the battery management system (BMS) 40 mounted on the lower part of the vehicle exchange related information such as charging status, voltage, current, and command value, and allow the charging operation to be stably performed.

More specifically, in wireless data communication between the power receiving module 30 and the battery management system (BMS) 40, information provided by the power receiving module 30 and the battery management system (BMS) 40 is as follows. According to the communication protocol of Tables 9 to 10 of

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT







XX5 CF_OBC_Rdy


100ms


0 0 One








Power receiving module








BMS Ready (can communication inside the charger, control board preparation command) CF_OBC_Wrn One One Set when a failure situation other than OBC failure occurs CF_OBC_Flt 2 One Fault (set when an OBC fault occurs) CF_OBC_CharMode 3 3 Charge all (CC/CV/CP) 4 CF_OBC_Connection 5 One Charging connector connection CF_OBC_ChgFinished 6 One End of charging
(Value: 1 ends) CF_OBC_PowerEnaStat 7 One Ready to charge notification CR_OBC_FltCode One 8 0~255 Charger error code
(Diagnosis communication code) CR_OBC_Temp 2 16 40~120℃ Charger internal temperature CR_OBC_Effi 3 24 0~110% Charger efficiency CR_OBC_MaxPwr_W 4 32 50W standard Maximum chargeable
Power value CR_OBC_MaxCur_A 5 40 0~150A Maximum chargeable
Current value CR_OBC_MaxVolt_V 6 48 0~1100V Maximum chargeable
Voltage value 7 56

Here, XX5 is information transmitted from the power receiving module, and is data related to internal status information of the power receiving module and state information related to charging.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT



XX1 CF_BMS_RdyForOBC




100ms


0 0 One



BMS



Power receiving module Ready (in-vehicle CAN communication, ready command) CF_BMS_WrnForOBC One One Warning (set when a failure situation other than BMS failure occurs) CF_BMS_FaultForOBC 2 One Fault (set in case of failure in charging impossible) CF_BMS_MainRlyOnStatForOBC 3 One High voltage relay on/off status when charging CF_BMS_PwrLmtForOBC 4 3 Floor cup power limit
5 CF_BMS_AbnorChg 6 One State of charge (0: Normal,
1: Abnormal) CF_BMS_OBCChgFinishedForOBC 7 One Charging complete status CR_BMS_SoForOBC_Pc One 8 5~90% Battery SOC(%) CR_BMS_CharRemainedTime_min 2 16 0~600
min
Remaining charge time
(Remaining time compared to full) 3 24 CR_BMS_OBCcmdCur_A 4 32 0~150A
CC mode constant current value 5 40 CR_BMS_OBCCmdVolt_V 6 48 0~1100V
CV mode constant voltage value 7 56

Here, XX1 is information transmitted from the battery management system (BMS), and is data related to internal state information of the battery management system (BMS) and state information related to charging.

However, the current technology for wirelessly charging a vehicle using a high voltage battery is the wireless power transmission device 1, the communication protocol 2 between the transmission module and the power reception module, and the communication protocol between the power reception module and the battery management system (BMS). Only (3) is defined. That is, there is a problem in that there is no technology for an interface connecting the wireless power transmission device 1 and a user and a communication protocol defining wireless data communication between the wireless power transmission device 1 and the interface.

KR 2014-0061337 A

The present invention has been proposed in order to solve the above problems, by combining a user interface with a wireless power transmission device, defining a communication protocol for operating it, and presenting a charging method through the interface of the wireless power transmission device, An object of the present invention is to provide an interface of a wireless power transmission device that easily charges a high voltage battery vehicle.

In addition, the present invention is a wireless power transmission device for efficiently charging a high-power battery vehicle by combining a user interface with a wireless power transmission device, defining a communication protocol for operating it, and providing a charging method using the interface of the wireless power transmission device. There is another purpose to provide the interface of.

In order to achieve the above object, a first embodiment of an interface of a wireless power transmission device according to the present invention includes a transmission module that transmits power and is installed outside a vehicle; A power receiving module installed in a vehicle and receiving power from the power transmission module; And a user interface module for controlling the position of the vehicle, the transmission module, and the power reception module so as to transmit power from the transmission module to the power reception module. It may be characterized in that it includes a.

In this case, the information transmitted from the power receiving module to the user interface module may be status information of the power receiving module and state information related to charging.

In particular, the information transmitted from the power receiving module to the user interface module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XX7 CF_RXWPT_RdyForOBC
100ms 0 0 One Repair module User interface module Receiving module Ready status
(CAN communication inside charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_BMS_SoForOBC_Pc One 8 5~90% Charge level indication

In addition, the information transmitted from the user interface module to the power receiving module may be status information of a user interface module, a charging-related command, operation-related information of a matching auxiliary module, and charging-related setting information. In particular, the user Information transmitted from the interface module to the power receiving module may be characterized in that it follows the communication protocol according to the following table.

ID
data
Cycle
data State value
(example)

FROM
TO
Contents BYTE BIT


XX8 CF_Navi_Rdy

100ms

0 0 One

User interface module

Power receiving module





Navigator Ready state CF_Navi_ChgStart One One Start charging button CF_Navi_ChgFinished 2 One Charging complete button CF_Navi_PAS_LocMatch_Start 3 One Start PAS position correction CF_Navi_PAS_LocMatch_End 4 One PAS position correction complete CR_WPT_Chr_Time
One 8 0~600min
Set charging time
2 16 CR_WPT_Chr_Power
3 24 0~10kW
Charging power setting 4 32

At this time, the information transmitted from the transmission module to the power reception module includes communication status information of the transmission module, vehicle information related commands of the transmission module, charging related status information, charging related commands, BMS information related commands, power receiving module information related commands, power transmission. It may be characterized as information of a module. In addition, the information transmitted from the power reception module to the power transmission module includes communication status information of the power reception module, response related to vehicle information of the power reception module, status information related to charging, information related to BMS control, information related to power reception module output, information related to vehicle and ID. It can be characterized by being.

In addition, the user interface module displays the location of the transmission coil that is connected to the transmission module to transmit power and the location of the reception coil that is connected to the power reception module to receive power, and guides the vehicle movement path. It may be characterized in that the vehicle is operated to match the transmission coil and the reception coil.

In addition, the user interface module may provide an initial screen for selecting charging by wireless power transmission and an execution screen for executing wireless power transmission.

In addition, the user interface module may be a vehicle navigation device.

A second embodiment of an interface of a wireless power transmission device according to the present invention includes a transmission module that transmits power and is installed outside a vehicle; A power receiving module installed in a vehicle and receiving power from the power transmission module; A user interface module for controlling the position of the vehicle, the power transmission module, and the power reception module so as to transmit power from the power transmission module to the power reception module; And the transmission coil and the reception coil are matched by moving the vehicle using the location information of the transmission coil that is connected to the transmission module to transmit power and the location information of the reception coil that is connected to the reception module to receive power. Matching auxiliary module to let; It may be characterized in that it includes a.

In this case, the information transmitted from the power reception module to the user interface module may be status information of the power reception module and state information related to charging.

In particular, the information transmitted from the power receiving module to the user interface module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XX7 CF_RXWPT_RdyForOBC
100ms 0 0 One Repair module User interface module Receiving module Ready status
(CAN communication inside charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_BMS_SoForOBC_Pc One 8 5~90% Charge level indication

In addition, the information transmitted from the user interface module to the power receiving module may be status information of a user interface module, a charging-related command, operation-related information of a matching auxiliary module, and charging-related setting information. In particular, the user Information transmitted from the interface module to the power receiving module may be characterized in that it follows the communication protocol according to the following table.

ID
data
Cycle
data State value
(example)

FROM
TO
Contents BYTE BIT


XX8 CF_Navi_Rdy

100ms

0 0 One

User interface module

Power receiving module





Navigator Ready state CF_Navi_ChgStart One One Start charging button CF_Navi_ChgFinished 2 One Charging complete button CF_Navi_PAS_LocMatch_Start 3 One Start PAS position correction CF_Navi_PAS_LocMatch_End 4 One PAS position correction complete CR_WPT_Chr_Time
One 8 0~600min
Set charging time
2 16 CR_WPT_Chr_Power
3 24 0~10kW
Charging power setting 4 32

In addition, the information transmitted from the power receiving module to the matching auxiliary module may include status information of the power receiving module, charging progress status information, vehicle location-related information, and vehicle movement-related check information. In particular, from the power receiving module The information transmitted to the matching auxiliary module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX9 CF_RXWPT_RdyForOBC

100ms

0 0 One

Power receiving module

Matching auxiliary module Receiving module Ready status
(CAN communication inside charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_RXWPT_Matching_1 One 8 0~50cm Vehicle position coordinate correction
(front) CR_RXWPT_Matching_2 2 16 0~50cm Vehicle position coordinate correction
(rear) CR_RXWPT_Matching_3 3 24 0~50cm Vehicle position coordinate correction
(Left) CR_RXWPT_Matching_4 4 32 0~50cm Vehicle position coordinate correction
(Right) CR_Matching_info 5 40 3 Vehicle movement ok/nok/removing

In addition, the information transmitted from the matching auxiliary module to the power receiving module may be status information of the matching auxiliary module, charging progress status information, vehicle location-related commands and information, and vehicle movement progress status-related information. Data transmitted from the matching auxiliary module to the power receiving module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XXA CF_PAS_Rdy

100ms

0 0 One

Matching auxiliary module

Power receiving module PAS Ready status information CF_PAS_ChgStart One One Charging start information CF_PAS_ChgFinished 2 One Charging complete information CR_PAS_LOC_Req 3 One Request moving coordinate information CF_PAS_LocMatch_Start 4 One Vehicle start moving CF_PAS_LocMatch_End 5 One Stop vehicle movement

At this time, the information transmitted from the transmission module to the power reception module includes communication status information of the transmission module, vehicle information related commands of the transmission module, charging related status information, charging related commands, BMS information related commands, power receiving module information related commands, power transmission. It may be characterized as information of a module. In addition, the information transmitted from the power reception module to the power transmission module includes communication status information of the power reception module, response related to vehicle information of the power reception module, status information related to charging, information related to BMS control, information related to power reception module output, information related to vehicle and ID. It can be characterized by being.

In addition, the user interface module may provide an initial screen for selecting charging by wireless power transmission and an execution screen for executing wireless power transmission.

In addition, the user interface module may be a vehicle navigation device.

In addition, the matching auxiliary module may automatically move the vehicle so that the positions of the transmission coil and the reception coil are matched with each other.

In addition, the matching auxiliary module may be characterized in that it is a parking assistant system (PAS).

A third embodiment of an interface of a wireless power transmission device according to the present invention includes a transmission module that transmits power and is installed outside a vehicle; A power receiving module installed in a vehicle and receiving power from the power transmission module; A user interface module for controlling the position of the vehicle, the power transmission module, and the power reception module so as to transmit power from the power transmission module to the power reception module; Matching the transmission coil and the reception coil by moving the vehicle using the location information of the transmission coil that is connected to the transmission module to transmit power and the location information of the reception coil that is connected to the power reception module to receive power. Matching auxiliary module; And a display device displaying a charging progress state by the wireless power transmission device. It may be characterized in that it includes a.

Further, the information transmitted from the power receiving module to the user interface module may be status information of the power receiving module and state information related to charging.

In particular, the information transmitted from the power receiving module to the user interface module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XX7 CF_RXWPT_RdyForOBC
100ms 0 0 One Repair module User interface module Receiving module Ready status
(CAN communication inside charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_BMS_SoForOBC_Pc One 8 5~90% Charge level indication

In addition, the information transmitted from the user interface module to the power receiving module may be status information of a user interface module, a charging-related command, operation-related information of a matching auxiliary module, and charging-related setting information. In particular, the user Information transmitted from the interface module to the power receiving module may be characterized in that it follows the communication protocol according to the following table.

ID
data
Cycle
data State value
(example)

FROM
TO
Contents BYTE BIT


XX8 CF_Navi_Rdy

100ms

0 0 One

User interface module

Power receiving module





Navigator Ready state CF_Navi_ChgStart One One Start charging button CF_Navi_ChgFinished 2 One Charging complete button CF_Navi_PAS_LocMatch_Start 3 One Start PAS position correction CF_Navi_PAS_LocMatch_End 4 One PAS position correction complete CR_WPT_Chr_Time
One 8 0~600min
Set charging time
2 16 CR_WPT_Chr_Power
3 24 0~10kW
Charging power setting 4 32

In addition, the information transmitted from the power receiving module to the matching auxiliary module may include status information of the power receiving module, charging progress status information, vehicle location-related information, and vehicle movement-related check information. In particular, from the power receiving module The information transmitted to the matching auxiliary module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX9 CF_RXWPT_RdyForOBC

100ms

0 0 One

Power receiving module

Matching auxiliary module Receiving module Ready status
(CAN communication inside the charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_RXWPT_Matching_1 One 8 0~50cm Vehicle position coordinate correction
(front) CR_RXWPT_Matching_2 2 16 0~50cm Vehicle position coordinate correction
(rear) CR_RXWPT_Matching_3 3 24 0~50cm Vehicle position coordinate correction
(Left) CR_RXWPT_Matching_4 4 32 0~50cm Vehicle position coordinate correction
(Right) CR_Matching_info 5 40 3 Vehicle movement ok/nok/removing

In addition, the information transmitted from the matching auxiliary module to the power receiving module may be status information of the matching auxiliary module, charging progress status information, vehicle location-related commands and information, and vehicle movement progress status-related information. Data transmitted from the matching auxiliary module to the power receiving module may be characterized in that it follows a communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XXA CF_PAS_Rdy

100ms

0 0 One

Matching auxiliary module

Power receiving module PAS Ready status information CF_PAS_ChgStart One One Charging start information CF_PAS_ChgFinished 2 One Charging complete information CR_PAS_LOC_Req 3 One Request moving coordinate information CF_PAS_LocMatch_Start 4 One Vehicle start moving CF_PAS_LocMatch_End 5 One Stop vehicle movement

In addition, the information transmitted from the power reception module to the display device may be charging progress status information and status information of the power reception module and the power transmission module. In particular, the information transmitted from the power reception module to the display device is information. It can be characterized by following the communication protocol according to the following table.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XXB CF_RXWPT_Charging 100ms
0
0 One Power receiving module Display Indication while charging CF_RXWPT_Finish One One Charging complete indication

At this time, the information transmitted from the transmission module to the power reception module includes communication status information of the transmission module, vehicle information related commands of the transmission module, charging related status information, charging related commands, BMS information related commands, power receiving module information related commands, power transmission. It may be characterized as information of a module. In addition, the information transmitted from the power reception module to the power transmission module includes communication status information of the power reception module, response related to vehicle information of the power reception module, status information related to charging, information related to BMS control, information related to power reception module output, information related to vehicle and ID. It can be characterized by being.

In addition, the user interface module may provide an initial screen for selecting charging by wireless power transmission and an execution screen for executing wireless power transmission.

In addition, the user interface module may be a vehicle navigation device.

In this case, the matching auxiliary module may automatically move the vehicle so that the positions of the transmitting coil and the receiving coil are matched with each other.

In addition, the matching auxiliary module may be characterized in that it is a parking assistant system (PAS).

Also, the display device may be a cluster.

An embodiment of a method for charging a vehicle through an interface of a wireless power transmission device according to the present invention includes: a charging request input step of receiving, by a user interface module, a charging request for the vehicle; A coil matching step of matching the transmission coil and the reception coil by moving the vehicle using the location of the transmission coil installed outside the vehicle and the location of the reception coil installed in the vehicle; A charging start step in which the user interface module receives a charging start request for the vehicle; And a charging completion step of completing charging of the vehicle. It may include.

In addition, in the coil matching step, the matching auxiliary module moves the vehicle using the location information of the transmission coil and the location information of the reception coil, so that the transmission coil and the reception coil are matched or the user interface module The location of the transmission coil and the location of the reception coil may be displayed, and a moving path of the vehicle in which the reception coil is installed may be guided so that the transmission coil and the reception coil match each other.

Further, in the coil matching step, the location of the transmission coil may be automatically input by the matching auxiliary module or manually input by the user interface module.

In addition, the coil matching step may include: a power reception module status check step of receiving, by the matching auxiliary module, status information of the power reception module from the power reception module; A vehicle position checking step of the matching auxiliary module receiving the position of the vehicle from the power receiving module; A vehicle moving step in which the vehicle is moved; A matching position determining step of receiving, by the matching auxiliary module, a position of the moving vehicle from the power receiving module, and determining whether the position of the vehicle is a position where the transmitting coil and the receiving coil are matched; And a matching completion step of stopping the movement of the vehicle when the location of the vehicle is a location where the transmission coil and the reception coil match. It may include.

Further, in the matching position determining step, when the position of the vehicle is not a position where the transmitting coil and the receiving coil are matched, the vehicle moving step may be performed again.

In addition, before the charging start step, the charging power setting step in which the user interface module receives the charging power or charging time for the vehicle; It may be characterized in that it further comprises.

In addition, in the charging completion step, the user interface module may receive an input of a charging completion request for the vehicle.

According to the wireless power transmission device for a vehicle according to the present invention, the user can easily charge the vehicle.

Further, according to the wireless power transmission device for a vehicle according to the present invention, it is possible to efficiently charge the vehicle by increasing the transmission efficiency of the receiving coil and the transmitting coil.

1 is a conceptual diagram showing a wireless power transmission apparatus according to the prior art.
Figure 2 is a block diagram showing a wireless power transmission apparatus according to the prior art.
3 is a block diagram showing data transmission and reception between a power transmission module, a power reception module, and a BMS according to the prior art.
4 is a block diagram showing a first embodiment of an interface of a wireless power transmission device according to the present invention.
5 is a block diagram showing a second embodiment of an interface of a wireless power transmission device according to the present invention.
6 is a block diagram showing a third embodiment of an interface of a wireless power transmission device according to the present invention.
7 is a block diagram showing data transmission and reception between a power receiving module, a user interface module, a matching auxiliary device, and a display device according to the present invention.
8 is a conceptual diagram showing a method of charging a vehicle through an interface of a wireless power transmission device according to the present invention.
9 is a block diagram showing an embodiment of a vehicle charging method through an interface of a wireless power transmission device according to the present invention.

It should be noted that the technical terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present specification should be interpreted in the meaning generally understood by those of ordinary skill in the technical field disclosed in the present specification, and excessively comprehensive unless otherwise defined in this specification. Or should not be interpreted in an excessively reduced sense. In addition, the accompanying drawings are for easy understanding of the spirit of the technology disclosed in the present specification, and the spirit of the technology is not limited by the accompanying drawings, and is included in the spirit and scope of the technology disclosed in this specification. It is to be understood to include all modifications, equivalents or substitutes that are made.

Hereinafter, a first embodiment of an interface of a vehicle wireless power transmission device according to the present invention will be described in more detail with reference to the accompanying drawings.

4 is a block diagram showing a first embodiment of an interface of a wireless power transmission device according to the present invention, and FIG. 7 is a block diagram showing data transmission and reception between a power receiving module, a user interface module, a matching auxiliary device, and a display device according to the present invention. Is also.

Referring to FIGS. 4 and 7, a first embodiment of an interface of a wireless power transmission apparatus according to the present invention may include a power transmission module 10, a power reception module 30, and a user interface module 110.

The power transmission module 10 transmits power and is installed outside the vehicle.

The power receiving module 30 receives power from the power transmission module 10 and is installed in a vehicle.

The user interface module 110 controls the position of the vehicle, the power transmission module, and the power reception module so as to transmit power from the power transmission module to the power reception module. That is, the user interface module 110 provides an interface between the power receiving module 30 and a user.

More specifically, the user interface module 110 determines the location of the transmission coil 21 connected to the power transmission module to transmit power and the location of the reception coil 22 connected to the power reception module to receive power. By displaying and guiding the vehicle movement path, the user can drive the vehicle to match the transmission coil and the reception coil. That is, the user interface module 110 may guide the user to move the vehicle and match the receiving coil 22 to the transmitting coil 21 by displaying a moving path of the vehicle. The user interface module 110 may be useful when the matching auxiliary module 120 to be described below is not included, and may be used in parallel with the matching auxiliary module 120. In addition, the user interface module 110 may provide an initial screen for selecting charging by wireless power transmission and an execution screen for executing wireless power transmission.

Here, the user interface module 110 may be a device capable of data communication with the power receiving module 30, and in particular, may be a vehicle navigation device.

In particular, the user interface module 110 can perform data communication so that a user can control the power receiving module 30 to charge a vehicle requiring electric charging or a high voltage battery vehicle. At this time, the user interface module 110 receives power reception module status information, charge status or charging progress status information such as charge amount/charge time/charge power information, and charge-related command/response from the power receiving module 30 can do. In addition, the user interface module 110 transmits a command or response such as status information of the user interface module, charging start/completion command, charging time setting/charging amount setting/charging power setting, etc. to the power receiving module 30. I can.

More specifically, the user interface module 110 may perform data communication with the power receiving module 30 according to a communication protocol according to Tables 22 to 23.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XX7 CF_RXWPT_RdyForOBC
100ms 0 0 One Repair module User interface module Receiving module Ready status
(CAN communication inside the charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_BMS_SoForOBC_Pc One 8 5~90% Charge level indication

Here, XX7 is information transmitted from the power receiving module 30 to the user interface module 110, and is data related to status information and charging-related status information of the power receiving module.

ID
data
Cycle
data State value
(example)

FROM
TO
Contents BYTE BIT


XX8 CF_Navi_Rdy

100ms

0 0 One

User interface module

Power receiving module





Navigator Ready state CF_Navi_ChgStart One One Start charging button CF_Navi_ChgFinished 2 One Charging complete button CF_Navi_PAS_LocMatch_Start 3 One Start PAS position correction CF_Navi_PAS_LocMatch_End 4 One PAS position correction complete CR_WPT_Chr_Time
One 8 0~600min
Set charging time
2 16 CR_WPT_Chr_Power
3 24 0~10kW
Charging power setting 4 32

Here, XX8 is information transmitted from the user interface module 110 to the power receiving module 30, and includes charging progress information of the user interface module, charging related commands, operation progress information of the matching auxiliary module, charging time and power setting information. It is data on the back. When the interface of the wireless power transmission device according to the present invention includes only the user interface module 110, data related to the parking assistant system (PAS) corresponding to the matching auxiliary module 120 in the XX8 is not used. Can be deleted or deleted. On the other hand, when the wireless power transmission interface according to the present invention includes another interface or the user interface module 110 performs more functions, data as necessary may be added to the XX7 and XX8.

Among the communication protocols according to the present invention, data provided by the power transmission module 10 to the power reception module 30 follow Tables 1 to 4 above as in the conventional communication protocol. In addition, among the communication protocols according to the present invention, the data provided by the power receiving module 30 to the power transmission module follows Tables 5 to 8 above in the same manner as in the conventional communication protocol. In addition, among the communication protocols according to the present invention, data mutually provided by the power receiving module 30 and the battery management system (BMS) 40 follow Tables 9 to 10 in the same manner as in the conventional communication protocol. However, in order to easily classify a counterpart module that communicates with the power reception module 30, data IDs XX5 and XX1 mutually provided by the power reception module 30 and the battery management system (BMS) 40 are respectively Change to XX5 and XX6. Here, the information transmitted from the transmission module 10 to the power reception module 30 includes communication status information of the transmission module, vehicle information related commands of the transmission module, charging related status information, charging related commands, BMS information related commands, It may be a command related to power reception module information or information on a power transmission module. In addition, the information transmitted from the power reception module 30 to the power transmission module 10 includes communication status information of the power reception module, response related to vehicle information of the power reception module, status information related to charging, information related to BMS control, information related to the power reception module output , Vehicle and ID-related information.

Hereinafter, a second embodiment of an interface of a wireless power transmission device for a vehicle according to the present invention will be described in more detail with reference to the accompanying drawings.

5 is a block diagram showing a second embodiment of an interface of a wireless power transmission device according to the present invention, and FIG. 7 is a block diagram showing data transmission and reception between a power receiving module, a user interface module, a matching auxiliary device, and a display device according to the present invention. Is also.

5 and 7, a second embodiment of an interface of a wireless power transmission apparatus according to the present invention may include a power receiving module 30, a user interface module 110, and a matching auxiliary module 120. In particular, in the second embodiment of the interface of the wireless power transmission apparatus according to the present invention, the power receiving module 30 and the user interface module 110 of the first embodiment are the same, but the matching auxiliary module 120 is different. That is, in this embodiment, the matching auxiliary module 120 is further included as an interface between the power receiving module 30 and the user. Among the configurations of the present embodiment, reference numerals in FIG. 4 are used for the same configurations as those of the first embodiment according to the present invention, and detailed descriptions thereof will be omitted.

The matching auxiliary module 120 includes location information of the transmission coil 21 connected to the power transmission module 10 to transmit power and the reception coil 22 connected to the power reception module 30 to receive power. By moving the vehicle 60 using the location information, the transmission coil 21 and the reception coil 22 may be matched. That is, the matching auxiliary module 120 moves the vehicle 60 in which the receiving coil 22 is installed in order to charge the high voltage battery of the vehicle 60, thereby moving the receiving coil 22 outside the vehicle. It is to match the transmission coil 21 installed in the. At this time, in order to efficiently charge the vehicle 60 equipped with the high voltage battery, the transmission coil 21 and the reception coil 22 must be accurately matched. Because, as shown in Fig. 1, the transmission coil 21 occupies a certain area on the ground, and the vehicle 60 is properly moved so that the reception coil 22 installed on the vehicle is accurately compared with the transmission coil 21 on the ground. This is because the more matched, the higher the power transmission efficiency of the wireless power transmission device 1 is.

In addition, the matching auxiliary module 120 may automatically move the vehicle 60 so that the positions of the transmission coil 21 and the reception coil 22 match each other. Here, the matching auxiliary module 120 may be a device capable of controlling the movement of the vehicle and performing data communication with the power receiving module 30, and in particular, is a parking assistant system (PAS). I can.

In particular, the matching auxiliary module 120 may receive command/response such as power reception module status information, charging-related status information, vehicle location-related information, vehicle movement coordinate information, and the like from the power reception module 30. In addition, the matching auxiliary module 120 transmits a command/response such as matching auxiliary module status related information, charging related status information, vehicle location related status information, and vehicle movement progress status information to the power receiving module 30. I can.

In more detail, the matching auxiliary module 120 may perform data communication with the power receiving module 30 according to a communication protocol according to Tables 24 to 25.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XX9 CF_RXWPT_RdyForOBC

100ms

0 0 One

Power receiving module

PAS Receiving module Ready status
(CAN communication inside the charger, control board ready) CF_RXWPT_Charging One One Indication while charging CF_RXWPT_Finish 2 One Charging complete indication CR_RXWPT_Matching_1 One 8 0~50cm Vehicle position coordinate correction
(front) CR_RXWPT_Matching_2 2 16 0~50cm Vehicle position coordinate correction
(rear) CR_RXWPT_Matching_3 3 24 0~50cm Vehicle position coordinate correction
(Left) CR_RXWPT_Matching_4 4 32 0~50cm Vehicle position coordinate correction
(Right) CR_Matching_info 5 40 3 Vehicle movement ok/nok/removing

Here, XX9 is information transmitted from the power receiving module 30, and is data related to status information of the power receiving module, charging progress status information, vehicle position movement coordinate information, check information during vehicle movement, and the like.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT


XXA CF_PAS_Rdy

100ms

0 0 One

PAS

Power receiving module PAS Ready status information CF_PAS_ChgStart One One Charging start information CF_PAS_ChgFinished 2 One Charging complete information CR_PAS_LOC_Req 3 One Request moving coordinate information CF_PAS_LocMatch_Start 4 One Vehicle start moving CF_PAS_LocMatch_End 5 One Stop vehicle movement

Here, XXA is information transmitted from the matching auxiliary module 120, and is data regarding status information, charging progress status information, vehicle movement coordinate information request, vehicle movement progress status information, and the like. In addition, when the wireless power transmission interface according to the present invention includes another interface or the matching auxiliary module 120 performs more functions, data as necessary may be added to the XX9 and XXA. Since the power reception module 30 and the user interface module 110 are substantially the same as the first embodiment of the interface of the wireless power transmission apparatus for a vehicle according to the present invention, detailed descriptions are omitted.

Hereinafter, a third embodiment of an interface of a wireless power transmission device for a vehicle according to the present invention will be described in more detail with reference to the accompanying drawings.

6 is a block diagram showing a third embodiment of an interface of a wireless power transmission device according to the present invention, and FIG. 7 is a block diagram showing data transmission and reception between a power receiving module, a user interface module, a matching auxiliary device, and a display device according to the present invention. Is also.

6 and 7, a third embodiment of an interface of a wireless power transmission device according to the present invention is a power receiving module 30, a user interface module 110, a matching auxiliary module 120, and a display device 130. It may include. In particular, in the third embodiment of the interface of the wireless power transmission device according to the present invention, the power receiving module 30, the user interface module 110, and the matching auxiliary module 120 of the second embodiment are the same, but the display device ( 130) is different. Among the configurations of the present embodiment, reference numerals in FIG. 5 are used for the same configurations as those of the second embodiment according to the present invention, and detailed descriptions thereof will be omitted.

The display device 130 may display a charging progress state by the wireless power transmission device. Here, the display device 130 may be a device capable of displaying charging in progress or charging completion, and in particular, may be a cluster.

In particular, when charging is started by the user interface module 110, the display device 130 may display a charging amount by the wireless power transmission device, a charging progress state, and whether or not charging is completed. At this time, the display device 130 may receive charging status or charging progress information from the power receiving module 30, and some functions of the user interface module 110, for example, charging start/charge Command/response such as time setting/charging amount setting/charging power setting, charging, etc. can be transmitted.

In more detail, the display device 130 may perform data communication with the power receiving module 30 according to the communication protocol shown in Table 26.

ID
data
Cycle data State value
(example)
FROM
TO
Contents BYTE BIT
XXB CF_RXWPT_Charging 100ms
0
0 One Power receiving module CLUSTER Indication while charging CF_RXWPT_Finish One One Charging complete indication

Here, XXA is information transmitted by the power receiving module and is data related to charging progress status information. In addition, when the wireless power transmission interface according to the present invention includes another interface or the display device 130 performs more functions, data as necessary may be added to the XXB. The power reception module 30 ), the user interface module 110 and the matching auxiliary module 120 are substantially the same as the second embodiment of the interface of the wireless power transmission device for a vehicle according to the present invention, and thus detailed descriptions thereof will be omitted.

Hereinafter, a method of charging a vehicle through an interface of a wireless power transmission device according to the present invention will be described in more detail with reference to the accompanying drawings.

8 is a conceptual diagram showing a method of charging a vehicle through an interface of a wireless power transmission device according to the present invention, and FIG. 9 is a block showing an embodiment of a method of charging a vehicle through an interface of a wireless power transmission device according to the present invention Is also.

8 and 9, an embodiment of a vehicle charging method through an interface of a wireless power transmission device according to the present invention is a charging request input step (S100), a coil matching step (S200), and a charging power setting step. (S300), may include a charging start step (S400) and a charging completion step (S500).

In the charging request input step (S100), the user interface module 110 receives a charging request for the vehicle. That is, in the charging request input step (S100), the user may input a charging request for the vehicle through the user interface module 110. When the interface module 110 receives a charging request from a user, a process for charging a vehicle including a high voltage battery, etc. described below may be performed. In the charging request input step (S100), data communication may be performed according to communication protocols XX7 and XX8 of Tables 22 and 23.

In the coil matching step (S200), the transmission coil is moved by moving the vehicle 60 using the location information of the transmission coil 21 installed outside the vehicle and the location information of the reception coil 22 installed in the vehicle. (21) and the receiving coil (22) are matched. More specifically, in the coil matching step (S200), the matching auxiliary module 120 uses the location of the transmission coil 21 installed on the ground and the location of the reception coil 22 installed on the vehicle. By moving ), the transmission coil 21 and the reception coil 22 can be matched. In addition, in the coil matching step (S200), the user interface module 110 displays the location of the transmission coil 21 and the location of the reception coil 22 and guides the vehicle movement path, so that the user The transmission coil 21 and the reception coil 22 may be matched by running. Here, the location of the transmission coil 21 may be automatically input by the matching auxiliary module 120 or may be manually input by the user interface module 110. Here, in the coil matching step (S200), data communication may be performed according to the communication protocols XX7, XX8, XX9 and XXA of Tables 22 to 25.

More specifically, the coil matching step (S200) includes a power receiving module status check step (S210), a vehicle position check step (S220), a vehicle movement step (S230), a matching position determination step (S240), and a matching completion step ( S250) may be included. Here, in the power receiving module status check step (S210), vehicle position check step (S220), vehicle movement step (S230), matching position determination step (S240) and matching completion step (S250), in Tables 22 to 25 Data communication may be performed according to communication protocols XX7, XX8, XX9 and XXA.

In the power reception module status checking step (S210), the matching auxiliary module 120 receives status information of the power reception module from the power reception module 30. That is, in the power reception module state checking step (S210), it is possible to check the charging ready state of the power reception module 30.

In the vehicle location checking step (S220), the matching auxiliary module 120 receives the location of the vehicle from the power receiving module 30. More specifically, in the vehicle location checking step (S220), the matching auxiliary module 120 receives the position coordinates of the front, rear, left and right of the vehicle from the power receiving module 30, and the current vehicle 60 The position of and the position of the receiving coil 22 installed in the vehicle 60 can be specified.

In the vehicle moving step (S230), the vehicle is moved. More specifically, in the vehicle moving step (S230), the matching auxiliary module 120 may move the vehicle using the location information of the transmission coil 21 and the location information of the reception coil 22. have. In addition, in the vehicle movement step (S230), the user interface module 110 displays the location of the transmission coil 21 and the location of the reception coil 22 and guides the vehicle movement path, so that the user The vehicle should be allowed to move. Here, the location of the transmission coil 21 may be automatically input by the matching auxiliary module 120 or may be manually input by the user interface module 110.

In the matching position determining step (S240), the matching auxiliary module 120 receives the position of the moving vehicle from the power receiving module 30, and the position of the vehicle 60 is determined by the transmission coil 10 It is determined whether the receiving coil 30 is a matched position. More specifically, in the matching position determination step (S240), the matching auxiliary module 120 collates the position of the transmission coil 10 installed outside the vehicle and the position of the receiving coil 30 installed in the moving vehicle. Thus, it is possible to determine whether the transmission coil 10 and the reception coil 30 match and the degree of matching. In addition, in the matching position determining step (S240), the position of the transmission coil 10 and the position of the receiving coil 30 installed in the moving vehicle according to the vehicle movement path guidance of the user interface module 110 are compared and the It is also possible to determine whether the transmission coil 10 and the reception coil 30 are matched and the degree of matching. In the matching position determination step (S240), the matching position determination may be determined based on whether the transmission coil 10 and the reception coil 30 match and the degree of matching, and in particular, the transmission coil 10 and A condition in which the receiving coil 30 matches 90% or more may be a criterion.

In the matching completion step (S250), when the location of the vehicle 60 is a location where the transmission coil 21 and the reception coil 22 match, the movement of the vehicle is stopped. That is, in the matching completion step (S250), after the transmission coil 21 and the reception coil 22 are matched, the vehicle may be stopped in order to charge the vehicle 60.

In the charging power setting step (S300), the user interface module 110 receives the charging power or charging time for the vehicle. That is, in the charging power setting step (S300), the user may input a charging amount for charging the vehicle, that is, charging power and charging time through the user interface module 110. The charging power setting step (S300) may not be performed as necessary, but in this embodiment, the charging power setting step (S300) is included. Here, in the charging power setting step (S300), data communication may be performed according to communication protocols XX7 and XX8 of Tables 22 and 23.

In the charging start step (S400), the user interface module 110 receives a charging start request for the vehicle. That is, in the charging start step (S400), the user can input the charging start for the vehicle through the user interface module 110. Here, in the charging start step (S400), data communication may be performed according to communication protocols XX7, XX8, XX9 and XXA of Tables 22 to 25.

In the charging completion step (S500), charging of the vehicle 60 is completed. More specifically, in the charging completion step (S500), when the vehicle 60 is fully charged, the charging of the vehicle may be completed. In addition, in the charging completion step (S500), the user interface module 110 may receive a charging completion request for the vehicle. That is, in the charging completion step (S500), the user can arbitrarily input the charging completion for the vehicle through the user interface module 110. Accordingly, the user can complete charging of the vehicle at any time. Here, in the charging completion step (S500), data communication may be performed according to communication protocols XX7, XX8, XX9, and XXA of Tables 22 to 25.

In any of the above steps, data communication may be performed according to the communication protocol XXB of Table 26. In addition, in any of the above steps, data communication may be performed according to the communication protocols of Tables 1 to 10 and Tables 22 to 26 as needed.

As described above, within the scope of the basic technical idea of the present invention, many other modifications are possible for those of ordinary skill in the art, as well as the scope of the present invention based on the appended claims. It will have to be interpreted.

1: Vehicle wireless power transmission device
2: Communication protocol between transmission module and receiving module
3: Communication protocol between the power receiving module and the battery management system (BMS)
10: transmission module
20: transmit/receive pickup coil
21: transmitting coil 22: receiving coil
30: receiving module
40: battery management system
50: power supply device 60: vehicle
100: Interface between power receiving module and user
110: user interface module
120: matching auxiliary module
130: display device

Claims (11)

In the power transmission device installed in the vehicle for charging the vehicle,
A user interface module for inputting a set charging time;
A display device that displays a user interface for inputting a charging start request; And
When the preset charging time is input from the user interface module, a charging start command for charging the vehicle is transmitted to a power transmission module installed outside the vehicle at the preset charging time, and the charging starts from the display device. When a request is input, a power reception module for transmitting the charging start command to the power transmission module before the preset charging time,
The power receiving module,
In order to start charging of the vehicle, communication state setting information, information indicating a standby state of the power transmission module, and information indicating a normal state of the power transmission module are received from the power transmission module,
Transmitting information indicating a charging start possible state and a state value of the power receiving module to the power transmission module,
The display device,
Power transmission device for displaying charging progress status information including a remaining time compared to full weight and status information of the power transmission module and the power reception module. In claim 1,
The display device,
Display the user interface for inputting a charging stop request,
The power receiving module,
When the charging stop request is input from the display device, a charging stop command for stopping charging of the vehicle during charging of the vehicle is transmitted to the power transmission module according to the preset charging time. In claim 1,
The power receiving module,
Power transmission device for receiving power from the power transmission module based on a constant current value or a constant voltage value according to a charging mode. In claim 1,
The power receiving module,
Power transmission device for transmitting a vehicle identification number to the power transmission module to start charging the vehicle. In claim 1,
The power receiving module,
Receiving the charger number of the charger installed outside the vehicle from the transmission module,
Power transmission device for transmitting a charger number confirmation message for the charger number to the power transmission module. In claim 1,
The user interface displayed by the display device,
Power transmission device that is a charging start button for inputting the charging start request. In the power transmission device in the vehicle,
A display device for setting a charging time according to a user input;
A button for instructing to start and stop charging according to a user operation; And
And a power receiving module for generating a first command based on the set charging time and a second command based on starting or stopping charging, and transmitting the generated first and second commands to a transmission module installed outside the vehicle, ,
The power receiving module,
While the vehicle is being charged based on the first command, the power transmission device requests the power transmission module to stop the charging based on the second command. In clause 7,
The power receiving module,
While receiving power from the power transmission module, the second command is transmitted to the power transmission module to stop receiving power from the power transmission module. In clause 7,
The display device,
Displaying a user interface for setting the charging time. In clause 7,
The display device,
The power transmission device to display charging progress status information according to the first and second commands, status information of the power transmission module, and status information of the power reception module. In clause 7,
The power receiving module,
Power transmission device for receiving power from the power transmission module based on a constant current value or a constant voltage value according to a charging mode.

Images