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BrianG
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09.02.2009, 09:51 PM

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Originally Posted by MetalMan View Post
...3. This is where it gets weird - instead of a CV phase, the 109 pulses the selected current to keep the voltage as close to 4.20v/cell as possible. The pulses become shorter and shorter as the pack nears 100% charge.
Wow, sounds like a cheap/easy way to achieve a sort of CV. Really, how much more CPU would it have taken to do a true CV (or at least an adaptive CV)? Besides, even though the pulses are short, I'm sure there are still some hefty instantaneous currents before the circuit "realizes" the voltage is too high.

On a related note, don't some battery manufacturers specifically not allow pulse chargers?
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lincpimp
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09.02.2009, 10:32 PM

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Originally Posted by BrianG View Post
Wow, sounds like a cheap/easy way to achieve a sort of CV. Really, how much more CPU would it have taken to do a true CV (or at least an adaptive CV)? Besides, even though the pulses are short, I'm sure there are still some hefty instantaneous currents before the circuit "realizes" the voltage is too high.

On a related note, don't some battery manufacturers specifically not allow pulse chargers?
Sounds like astro were not running on all 8 when they designed this charger...
   
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