Batteries

[Mr Ripple]

It's sort of in here undrr load sharing.

https://www.mpoweruk.com/life.htm

• Load SharingCapacitors and Supercapacitors.
  • 
    For pulsed applications the peak load on the battery can be reduced by placing a large value capacitor in parallel with the battery. Energy for large instantaneous loads is supplied by the capacitor effectively reducing the duty cycle and stress on the battery. The capacitor recharges during the quiescent periods. Claims of a sixty percent increase in cycle life are made for this technique.
    
    Another benefit of this arrangement is that since the battery supplies less of the instantaneous peak load current, the voltage drop across the battery will be lower. For high power pulses this voltage drop can be very significant.
    

 

[Richard Winter]

It's sort of in here undrr load sharing.

https://www.mpoweruk.com/life.htm

• Load SharingCapacitors and Supercapacitors.
  • 
    For pulsed applications the peak load on the battery can be reduced by placing a large value capacitor in parallel with the battery. Energy for large instantaneous loads is supplied by the capacitor effectively reducing the duty cycle and stress on the battery. The capacitor recharges during the quiescent periods. Claims of a sixty percent increase in cycle life are made for this technique.
    
    Another benefit of this arrangement is that since the battery supplies less of the instantaneous peak load current, the voltage drop across the battery will be lower. For high power pulses this voltage drop can be very significant.

Correct but a totally different application. This principle relies on the parallel capacitance storing the charge and dissipating hence reducing the load on a battery.

 

[Mr Ripple]

Correct but a totally different application. This principle relies on the parallel capacitance storing the charge and dissipating hence reducing the load on a battery.

Yes but isn't it referencing load sharing as in the heading meaning in multi cell set ups?


" Another benefit of this arrangement is that since the battery supplies less of the instantaneous peak load current, the voltage drop across the battery will be lower. For high power pulses this voltage drop can be very significant."

 

[Simon G]

you'll have less sag at higher watts using a 2 cell mod...... which should mean you can vape for longer before the cut off hits at the same power on an individual cell right?

 

[Richard Winter]

Yes but isn't it referencing load sharing as in the heading meaning in multi cell set ups?


" Another benefit of this arrangement is that since the battery supplies less of the instantaneous peak load current, the voltage drop across the battery will be lower. For high power pulses this voltage drop can be very significant."

It has nothing to do with mulit-cell applications as we know in vaping.
A capacitor in the application they are referencing is an energy stored device and where required can provide power in very short bursts when part of an overal electronic circuit. Because it in principle reduces the work on the battery, they mention it as losd sharing.

 

[Mr Ripple]

It has nothing to do with mulit-cell applications as we know in vaping.
A capacitor in the application they are referencing is an energy stored device and where required can provide power in very short bursts when part of an overal electronic circuit. Because it in principle reduces the work on the battery, they mention it as losd sharing.

Looks like I'm going to have to find my source.
Watch out google foo is imminent.....

 

[Richard Winter]

you'll have less sag at higher watts using a 2 cell mod...... which should mean you can vape for longer before the cut off hits at the same power on an individual cell right?

Not to sure on the battery sag.

 

[Simon G]

Not to sure on the battery sag.

no?

I'm thinking halving the wattage would decrease that a lot, but I don't vape at high enough power to get much sag, so I don't know for sure.

 

[Richard Winter]

Looks like I'm going to have to find my source.
Watch out google foo is imminent.....

I will have a look too as I would be very surprised to read a 20% increase of current when using 2 cells lol.

 

[Richard Winter]

no?

I'm thinking halving the wattage would decrease that a lot, but I don't vape at high enough power to get much sag, so I don't know for sure.

I would of thought battery sag of two cells in parallel would reduce the overall current available from those two cells in true life. For instance, two 2000mA batteries would not provide 4000mA but more like 3800mA.