Setup is as follows:
PSUA (Supply), HP 6632B, CV mode supplying the Batteriser input voltage
PSUB (Load), HP 6632B, CC mode loading/sinking the Batteriser output fixed at 125mA
Do you need a special flavour of power supply (such as your lovely HPs) to do this, or is there a way of doing this with most lab supplies in constant current mode?
I can confirm similar but not as bad behavior with a 1.4V input, 150ohm load (resistor box), and a Rigol DP832 PSU input.I really don't think it is instability. It is "by design" intentional behaviour. At 150 Ohms load, the regulator is going to sleep (to save current) and waking again. This is a common method converters use if they are attempting to have a high efficiency over a wide current range.
Is it possible to better simulate a battery with a PSU by simple using a series resistor to simulate the ESR of a battery? Of course, the resistor needs to be adjusted depending of the output voltage, but can be fixed for a given output voltage, unless the load gets too high. But might be more complicated if you want to do it right. Looks like there is some demand for this, because there is a neat battery simulator device:
http://www.tek.com/tektronix-and-keithley-dc-power-supplies/keithley-series-2281s-battery-simulator
I can confirm similar but not as bad behavior with a 1.4V input, 150ohm load (resistor box), and a Rigol DP832 PSU input.I really don't think it is instability. It is "by design" intentional behaviour. At 150 Ohms load, the regulator is going to sleep (to save current) and waking again. This is a common method converters use if they are attempting to have a high efficiency over a wide current range.
Correct. I though it didn't have any oscillation with the Alakline but did with the PSU & NiMh, but that's because my Alakline was too high a voltage (1.5V) and the regulator simply wasn't on at all.
Repeating test with 1.3V alkaline shows the same oscillation.
So yes, it's the chip going into a sleep type mode and the caps charging.
Until the total collapse, the batteriser output voltage is higher and flatter than the battery only.
But under no circumstances will I get more energy out of the battery !
Looks like a Diode, 0,438V Drop with no battery attached.
So here are two possible Batteriser failure modes that do not involve the clip shorting to the battery cell case. Both could end up with a Batteroo that shorts out the battery.
Out of curiosity, has a batteroo sleeve ever been sent to anyone who can decap the boost converter IC? I did see it being mentioned in the original thread, but I don't know if that ever happened.
Does anyone know?
Out of curiosity, has a batteroo sleeve ever been sent to anyone who can decap the boost converter IC? I did see it being mentioned in the original thread, but I don't know if that ever happened.
Does anyone know?
Not as far as i know, but i can certainly send one of mine if someone can do it?
Out of curiosity, has a batteroo sleeve ever been sent to anyone who can decap the boost converter IC? I did see it being mentioned in the original thread, but I don't know if that ever happened.
Does anyone know?
Not as far as i know, but i can certainly send one of mine if someone can do it?
See here:
https://www.patreon.com/zeptobars
$2.50 per chip.
contact made, package will be leaving next week en-route to Zeptobars
Our friend Ali is kicking up a storm over here:
https://www.linkedin.com/pulse/cool-invention-saves-you-money-frustration-alan-elbanhawy
Still spouting the UL test as if it's the gold standard.
Our friend Ali is kicking up a storm over here:
https://www.linkedin.com/pulse/cool-invention-saves-you-money-frustration-alan-elbanhawy
Still spouting the UL test as if it's the gold standard.A "Power System Architect at Exar Corporation" wrote that?