dicodes SBS18350Qi Посібник - Сторінка 8

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05 Main Menu (Page 4)

Notes about high power vaping

As the SBS18350-QI can be used up to 60W using special battery tubes, here some explanations for

vaping at high power, i.e. 50-60W with one battery.

It is strongly recommended that only the best in class batteries are used and that all contacts are kept clean.

Always keep in mind that 60W taken even from a high drain battery will create power losses (heat) in the

batteries inner resistance as well as at all mechanical contacts, which finally will reduce the total vape time

and lead to volt drop. The power-losses inside the battery can be significant as a simple calculation shows:

Example (neglegting efficiency of electronic):

Inner battery resistance 25m

Voltage at battery under load 3.3V

Output Power 60W

The box is equipped with different kinds of power reduction mechanisms to keep the operation in a safe

region for the battery and the electronic. If the power is reduced, the actual power output is displayed

instead of the setpoint.

1. The output current is limited to 20A: When the atomizer or coil resistance is comparably low and when

the power is set to high values, the actual output power will be limited according to the formula

Pout<= Imax²* Rcoil

Example: Rcoil=0.12 => Pout,max= (20A)²*0.12 = 48W, regardless of the power setting (unless

it is lower than 48W)

The limitation works dynamically, i.e. if the wire changed (e.g. a TC-wire), the limitation will

adapt to this.During limitation the display shows a blinking "Io" (not to mix with "low").

2. The output voltage is limited to 10V: When the atomizer or coil resistance is high, power is limited

according to

Pout<=Umax²/Rcoil

Example: Rcoil=1.8 => Pout,max=(10V)²/1.8 = 55.5W

The limitation works dynamically. For example when using a TC-wire the initial power can be very high and

as soon as the wire is hot, the power will be reduced. During limitation the display shows a blinking "Uo".

3. The output power is reduced, when the battery voltage drops to a value dependent of parameter

Ubat,min (range 2.5 to 3.0V) according to the formula

Pout,max= the lower of [60W and 10W+(UbL-Ubat,min)*10W/0.1V]

Example: Ubat,min=2.7V, UbL=2.9V (battery voltage including drop during power output)

=> Pout,max = 10W+ (2.9V-2.7V)*10W/0.1V = 30W

During limitation, the display shows a blinking "low".

Note that the power is less reduced, when the battery inner resistance is low. Also note that power is

reduced only if the battery voltage drops below 2.9V in the example (at Ubat,min=2.7V).

The limitation automatically leads to drastic power reduction, when using small 18350 batteries, because

of their high inner resistance , thus preventing the battery from heavy overload.

Please note to set Ubat,min to 2.7V or higher when using 18350 batteries.The default setting is 2.7V.

Power-loss,battery = (60W/3.3V)² * 25mW = 8.3W

(14% of output power)