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e*clipse · 08-07-2015, 03:48 AM

Excellent news - thanks for the update.

I think this is a great way to supply a charger. I made a small demo boost converter charger that relied heavily on the batteries to smooth the output. It was based on an Infineon boost controller. When the cells (measured individually with the BMS) reached the constant voltage stage of charging, the BMS would ultimately control the charging. It did this by measuring the cells' voltage and calculating the voltage drop slope curve over time. The BMS would turn off the charger when the cells reached a pre-determined voltage, then turn on again when the voltage drop curve reached a pre-determined slope. Charging was complete when the voltage drop curve slope was low enough to consider the charge complete.

Do you have any #'s regarding boosting for 50kW or 60kW?

Or were you thinking of doing this differently than 'Yota (boosting to 650V, then creating 3ph)

For example were you planning *somehow* to boost to 3 ph directly??

Sorry if you've covered this already, I guess I'm a few steps back.

Thanks a bunch,

E*clipse

08-07-2015, 03:48 AM	#8 (permalink)
e*clipse Permanent Apprentice Join Date: Jul 2010 Location: norcal oosae Posts: 523 Thanks: 351 Thanked 314 Times in 215 Posts	Excellent news - thanks for the update. I think this is a great way to supply a charger. I made a small demo boost converter charger that relied heavily on the batteries to smooth the output. It was based on an Infineon boost controller. When the cells (measured individually with the BMS) reached the constant voltage stage of charging, the BMS would ultimately control the charging. It did this by measuring the cells' voltage and calculating the voltage drop slope curve over time. The BMS would turn off the charger when the cells reached a pre-determined voltage, then turn on again when the voltage drop curve reached a pre-determined slope. Charging was complete when the voltage drop curve slope was low enough to consider the charge complete. Do you have any #'s regarding boosting for 50kW or 60kW? Or were you thinking of doing this differently than 'Yota (boosting to 650V, then creating 3ph) For example were you planning somehow to boost to 3 ph directly?? Sorry if you've covered this already, I guess I'm a few steps back. Thanks a bunch, E*clipse