EUNICYCLES SC-350 User manual

SMART CHARGER
SC-350/360/380(L/V)/580(L)/500
Version v3.12
Advanced Li-Ion battery charger dedicated to popular electric unicycles on the
maket with battery capacity higher than 600Wh

1. asic information
Model SC-350 SC-360 SC-380 SC-380L SC-380V SC-580 SC-580L SC-500
Operating
temp. 0 … 40 C
Input
voltage 230 VAC ±10%
Charge
voltage
58.8V
±0.2V
67.2V
±0.2V 84V ±0.2V 100.8V ±0.2V
Max.
charge
current
5.1A
±0.1A
4.4A
±0.1A 3.5A ±0.1A 6.0A ±0.1A 5.0A ±0.1A
Weight 1 kg 1.2 kg
Dimensions 15.5 x 9 x 5 cm 19 x 9 x 6 cm
Charge
connector
Ninebot
/ Xiaomi GX16-3 GX16-4 Lenovo / Yoga GX12-3 GX16-4 Lenovo / Yoga GX16-5
Special features:
•Built-in LED display
•Charging voltage and current information
•Charge level and energy transferred information
•Adjustable charge cut-off point 60 – 100%
•Adjustable charge current.
•uilt-in micro US port
•Flash memory for logging the charging process
•Estimated charging time algorithm
•Overload, shortcut, overvoltage protection
Contents of the package:
•Charger
•230VAC EU power cable
•Fuse x2
•USB cable with 8mm plug
King Song Poland 1

① 230VAC power socket
② LED display
③ Settings button
④ USB port
⑤ Fuse socket
⑥ Charge cable
⑦ LED diode
⑧ Cooling fan
2King Song Poland

2. User interface
When charger is powered on the LED display ②shows information about charging
voltage and current:
SC-350 SC-360 SC-380(L/V) / 580(L)
58.80
0.00
67.20
0.00
84.00
0.00
or information about battery charge level given in percent [%] and energy transferred to
battery given in Wat hours [Wh].
0
0.00
The third set of parameters includes the charging time and the expected time to complete
charging. When the unicycle is not connected to the charger, the indicated value is 0.
00:00
00:00
The LED diode ⑦should be green.
While charging:
While charging the level of voltage should show values lower or the same like maximum
voltage of charger. The measured current should not exceed configured value.
Examples of display values for model SC-360 when charging is in progress:
64.39
4.47
King Song Poland 3

When button ③ is pressed the LED display shows second information set.
72
476.3
The value in upper line is the battery charge level given in percent [%]. The value in lower
line of display is the total energy transferred to battery given in Wat hours [Wh], measured
from the charger power on.
Another pressing of the button will display the ③delayed charging time and the estimated
time to complete charging.
01:00
03:34
While charging the LED diode ⑦ should be red.
After charging:
Once the set charge level has been reached, the charger will turn off the output circuit and
will report the end of charging displaying the "End" flashing in the bottom line.
100
End
The LED diode ⑦should be green.
By pressing the button ③ you can switch information on the display. NOTE: the displayed
information is frozen when charging is completed. The display shows the voltage,
current and charge level registered at the end of charging.
After charge ends, charging can be resumed only when:
- the button ③ is held down for 3 seconds and the user goes through the whole settings
menu and leaves it.
- the charger will be powered off and after a few seconds will be powered on (hard reset)
4King Song Poland

ATTENTION: when charging up to 100%, it may happen that the LED diode turns⑤
green efore "End" appears on the display. The actual end of charging will however
takes place only when "End" appears on the display.
Switching between fast and slow charging
The charger give possibility to charge with two configurable modes: fast and slow. The
current level can be set for each of the modes in Settings menu. Switching between
modes can be done by fast double click of button ③. The display will show new mode and
then the current level will be automaticaly adjusted to specifed value.
Charge Fast mode:
chrg
fa5t
Charge Slow mode:
chrg
5low
ATTENTION: the setted current can be little different than the real used (± 0.2A). The
charger constantly adjusts the current level during the charging process.
ATTENTION: this function is not available when the Slow charge threshold is setted.
Default screen
When the charger is switched on, the screen will display one of three information screens.
The displayed screen is the default one. When the charger is started for the first time, the
default screen informs about voltage and charging current. To change the default screen,
press the button ③ for 3 seconds until entering the Settings menu. Then go through the
entire menu and leave it. From now on, the screen (information) that was displayed before
entering the setting menu, will be the default.
King Song Poland 5

Settings menu
When the user wants to enter to settings menu the button ③ should be pressed and held
for 3 seconds until „cut” appears in the top line of the display.
cUt
100
By quick pressing button ③ the user can scroll through the menu options.
To enter the parameters edit mode - press and hold the button ③ for 3 seconds. In edit
mode user can adjust parameter by clicking of button ③. After a few seconds, the new
value of parameter will be approved and stored.
Charge cut off level
cUt
85
The charger allows user to set the charging end threshold in the range of 60 - 100%. The II
stage of charge starts at 80 - 85% so to avoid this please setup charge cut off level to 80 -
85%.
ATTENTION: To alance the cells of the attery it is important to charge up to 100%
from time to time.
Hold time (delay)
hold
00:00
The time to hold the charger. When the downtime counter expired the charger will start to
charge. This function can be useful in the night charge, The charge process can be
delayed to be sure it will finish exactly on time.
6King Song Poland

Fast charge current
fa5t
4.40
Currents settings for fast charging mode. Value of settings can be changed in range of
Slow charge current + 0.1A, up to maximium of permissible current for each type of
charger.
Slow charge current
5low
2.60
Currents settings for slow charging mode. Value of settings can be changed in range of
minimal possible to get for charging current (ca. 2.6), up to Fast charge current – 0.1A.
Slow charge threshold
5low
off
This function activate automatic current adjustment. The charger will charge in the fast
mode but when the battery capacity percentage reach this value, the charging current will
be switched to slow mode. The value can be edit in range 50 – 100%. After enable this
function the Switching between fast and slow charging will be disabled.
More settings
more
5ett
To enter to additional settings menu the button should be pressed and held for 3③
seconds.
King Song Poland 7

Display maximum brightness
bMa
70
Percentage value of maximum power for display brightness. Maximal brightness occurs
when the user touches the device (pressing the button and changing the settings).
Display minimal brightness
bmin
20
Percentage value of minimal display brightness. Minimal brightness occurs when the
screen is not active (none of the buttons is pressed) for a longer period of time Dim time.
Dim time
dimT
30s
The time after which the display switches to default and dim the brightness to the set value
of Display minimal brightness. If this parameter has a value of 0s, the display will never
turn into standby mode.
ight alarm of charge end
Alar
on
When charging ends, the blinking sign End appears on the display. When light alarm has a
value on after charging, the display will be additionally blinking between max and min
value of settings for brightness.
8King Song Poland

og entry interval
Ilog
30 5
Specifies the time in seconds as to how much the log in the flash memory should be
written.
Declared battery capacity (Wh)
CAPA
960
The capacity of the battery being charged. The value is used for the algorithm that predicts
the charging time.
Activation of the firmware update
fIRM
UPlD
Activating this option starts the firmware upgrade mode. Description of the update
available in the chapter Firmware update
King Song Poland 9

3. US port
In order to connect the charger to a PC, use a micro USB cable with an extended plug of
8mm or 9mm.
Log loading access
Note: USB connection to the computer should e made when the charger is not
charging the unicycle. Otherwise, the currently saved file - the loading log may e
corrupted and will not e reada le.
After connecting the charger to the computer via the USB port, the device will be available
as a flash drive. Files with the csv extension from the loading process are stored on the
disk. One file contains data from a single loading process. Each file has a sequential
number indicating the number of all charging cycles that the charger has made so far.
You can import a CSV file into an Excel spreadsheet or LibreOffice Calc. The sign
separating the columns is tab. For analyzing logs, you can use our chart generator
available at:
https://eunicycles.eu/SmartCharger
10 King Song Poland
5-6mm 8mm
standard
extended plug

Firmware update
The charger software version is displayed on the screen in the bottom line when the
charger is powered on.
5C38
v3.12
The latest version of the charger software is available on the website:
https://eunicycles.eu/SmartCharger/Firmware
If the version on the website is newer, download it, unpack it and carry out the process of
updating the charger software.
The update process:
1. Download and install the USB DFU drivers
https://eunicycles.eu/SmartCharger/DFU_Drive r.zip
2. Then Activation of the firmware update in the charger settings menu
3. Within 15 seconds, connect the USB charger to the PC. If the cable is not plugged in
within 15 seconds of activating the software update, the charger will restart and return to
normal operation.
4. Run the UPLOAD.bat file from the new version folder. After the upgrade, a set of
messages should appear on the computer screen as below.
4. Then disconnect the charger from the power supply and switch it on again after a few
seconds.
King Song Poland 11

4. Charger errors
Charger shortcut or overload:
When the charger detects a dangerous condition, the LED will flash green or red. This
state will be maintained until the charger is powered off and on again.
Exceeding the current:
When the measuring system detects a charging current higher than the one determined for
the given charger model, the charging process will be switched off and the information
regarding the overload will appear on the display screen.
67.20
OVCr
Errors in measurements:
When the measuring system detects anomalies related to current and voltage
measurements, the error code will appear on the screen as below:
Err
3
Meaning of errors:
Error description Error code
1 2 3 4 5 6 7
Voltage too low. ● ● ● ●
Current too low ● ● ● ●
Voltage too high ● ● ● ●
If any of the above errors occur, please contact the service immediately at
[email protected]
12 King Song Poland

5. Tips for use
Depending on the preferences, select the appropriate charge mode and cut-off level.
Charging Set level of cut-off Approximate charging time
from 0% (680Wh)
Full 100 3.5 h
Optimal 95 3h
Fast 85 2.5h
Charging characteristics for Li-Ion 680Wh
To avoid the second charging phase of Li-Ion (charging with constant voltage), the charging
must be stopped below 87% of full charge
King Song Poland 13

6. Comments
•There is life-threatening voltage inside the device. Please do not open the charger.
Please contact us if in the event of the failure.
•First connect the charger to the 230VAC mains voltage, then to the unicycle.
•Do not expose the device to direct contact with water.
•Do not cover the device during charging. Allow air to flow through the ventilation
gaps.
•Do not use the charger in hot places or directly in the sun.
•Use away from children.
King Song Polska
Support: [email protected]
www.kingsong.pl
14 King Song Poland