and if i wanted to get 10mph speed out of 8.5mph groove motors i need to program it? Is that a complex procedure?
(BMS) is not the best charger for dummy use?
Yes, that's why I said "after assembling a pack as you did" (or some such). It really does simplify things. BTW, it would not be difficult to have a microcontroller sense voltage at the Hyperion input and electronically push its button once, or even do a sequence of pushes, and it might even be possible for Hyperion to script this into the init's own MCU. Programming the Roboteq to monitor no-load voltage and safety stop the system, or to just give you an audible or visible alarm by hooking a buzzer or light to a Digital Out pin would be a snap. Of course, Dynamic or P&G etc. could easily program their processors to do that too (though we can't). Ciao, LennyBut BMS also does the following:
Over discharge pack protection -- Volts - but ignores volt drop under load - time based - guessed at some random use and causes problems.
Over discharge pack protection -- Volts under load - correct settings depend on cells, cell count (capacity), actual load in use etc.
Over discharge individual cells (as above - both - depends on cells, count, capacity, C rate, load, etc so always wrong...)
Over discharge Amps over a very short indeterminate time (Depends on Cell count, Capacity, and short pulse C rate)
Over discharge Amps continuous (depends on cell count, capacity, and cont. max rating in amps)
Cell balance DURING USE (A really stupid thing to do but many try to do this regardless)
Disconnect charger when balance volts go above typically 3.9v which is way too high...
Disconnect charger when PACK volts go above some way too high figure...
Etc, etc...
What do you see as the difficulties with this? I thought it would be quite straightforward which is now making me think that I'm missing something obvious!
The only complication I see is in interfacing to the Hyperion with whatever microcontroller one wanted to use - essentially a question of how "open" or easy to reverse engineer the existing interface is... Certainly it is no problem at all to use a microcontroller as a "virtual finger" to push buttons if that's all that's needed....
I still think (and wish you'd suggest it to your contacts there) that they would come up with a "simplified Hyperion" that only had one (or a very small number) of charge profile slots, programmable via computer, but a minimal control panel - presumably a go/no-go LED and a start button...
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