Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: Wireless Power Charger System / Description and operating principle

Hyundai Elantra (CN7) 2021-2024 Service Manual / Body Electrical System / Wireless Power Charger System / Description and operating principle

Description and Operation
Wireless Power Charger System
During ACC or IG ON, battery voltage is supplied to the wireless power charger system to transmit an output of 5 W to mobile phone.
Mobile phones certified with the wireless charging standard WPC (Qi 1.1.2) or equipped with an exclusive wireless charging case can be used.
   
•
WPC : Wireless Power Consortium
•
Qi 1.1.2 : refers to certified product with the capability to transmit power of up to 5 W and detect metal and other impurities to prevent heating.

1.
Power receiver : embedded with the secondary coil designed to receive the induced current from the charging pad.
2.
Charging pad : electrical coils wound inside the plastic cover.
3.
Coil : Rectangular and circular coils generate diverse electromagnetic fields.
A.
Connect power to the charging pad to generate electromagnetic fields in the coil.
B.
Current induced from electromagnetic induction phenomenon is sent to the power receiver to charge the battery.
System Configuration Diagram

1.
Instrument cluster : Alerts about contact with mobile phone
2.
BCM unit : Determines contact with mobile phone
3.
Wireless charging lamp : Displays the charging status
4.
SMK unit : Stops charging during the activation of LF
Major Functions of Wireless Power Charger System
1.
Charging Function
(1)
Activation method
a.
Close all doors of the car.
b.
Switch vehicle power to ACC or IG ON.
c.
Place the wireless charging-enabled mobile phone on the tray.
(2)
Charging status display
Mode
Charging LED display
Remarks
Stand by for charging
LED turned OFF


Charging in process
Amber LED turned ON


Charging completed
Green LED turned ON


Charging error
Amber LED blinks

–
Blinks 10 times for 10 seconds, then LED is turned off for 50 seconds
(total 60 seconds)

2.
Alert for contact with mobile phone
(1)
Activation method
a.
Key OFF while the mobile phone is being charged.
b.
Checks if the mobile phone is placed on the wireless charging unit.
c.
Alert message for contact with mobile phone is displayed on the instrument panel (for about 4 - 5 seconds).

3.
Overheating prevention
(1)
Activation method
a.
If the thermistor temperature inside the wireless charging module rises above a certain level (158°F (70°C)), charging will stop to protect the mobile phone battery.
   
•
The amber LED of the charging display lamp blinks 10 times for 10 seconds, and then it is turned off for 50 seconds (total 60 seconds).
•
The process is repeated for every 60 seconds.
b.
If the thermistor temperature falls below a certain level (149°F (65°C)), charging will restart.
   
When the charging function is restarted, the amber LED of the charging display lamp will be turned on.
4.
Foreign matter detection
(1)
Charging will be stopped if there is a coin or other metallic object between the wireless charging unit and the mobile phone.
[Foreign matter]

   
•
Foreign matter : All metallic objects such as coins, clips, and precious metals
•
The amber LED of the charging display lamp blinks 10 times for 10 seconds, and then it is turned off for 50 seconds (total 60 seconds).
•
The process is repeated for every 60 seconds.
   
Be careful as touching the foreign matter by hand may cause burns.
(2)
After the system has detected foreign matter and stopped charging the mobile phone, the charging will resume in about 60 seconds once the foreign matter has been removed.
   
When the charging function is restarted, the amber LED of the charging display lamp will be turned on.
5.
SMK unit LF frequency interference prevention
This function prevents interference between the wireless charging frequency and smart key unit frequency band.
(1)
Wireless charging is stopped when the door is open or the SMK unit is in LF mode (searching for smart key).
e.g. Wireless charging function is stopped if the driver carries the smart key out of the vehicle during IG ON.

   
Charging will stop and the amber LED of the charging display lamp will turn off.
(2)
It will return to normal operating status when the LF mode of the SMK unit is completed.
6.
Turn the wireless charging function ON/OFF with USM.

※ Tailgate applies to RV vehicle models.
Protection of Wireless Power Charger System
Item
Condition
Status
Protects against low/high voltage
Protects and stops charging under 7.0V and over 16.5V
LED OFF
(Stops operation)
Charges over 7.5 V and under 16.0V
Protects against reverse voltage
Protects and stops charging in case of reverse voltage
LED OFF
(Stops operation)
Protects against overcurrent
Protects and stops charging in case of detecting 4.5A
Amber LED blinks
Protects against overheating
 Protects and stops charging in case of detecting 158°F (70°C) by internal temperature sensor of wireless charging module
Amber LED blinks
Resumes under 149°F (65°C)
Foreign matter
(Coins, clips, precious metals, etc.)
Protects and stops charging in case of detecting foreign matter (overheating prevention)
Amber LED blinks
Prevents frequency interference
Protects and stops charging by activating SMK in case door or tailgate is open
LED OFF
(Stops operation)
Resumes in 3.5 seconds after all doors and tailgate are closed and SMK operation is completed
Alert for contact with mobile phone
During key-off with contact with mobile phone
Displays warning message on the instrument panel
(for about 4-5 seconds)

※ Tailgate applies to RV vehicle models.

    Wireless Power Charger System

    ..

    Components and positions

    Components1. Wireless power charging unit2. Wireless power charging lamp..

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