Question about Solar Lithium Ion/Polymer charger - v1.0

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tablet
 
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Re: Question about Solar Lithium Ion/Polymer charger - v1.0

Post by tablet »

Hello, thanks for reply. Then, How can I charge the battery?
Do I use a bigger solar panel, 12v 10W or 6V 10W?
If I use a 12V solar panel then I have to adjust the output voltage of solar panel to connect the charger.
Thanks,
Regards.

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adafruit_support_bill
 
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Re: Question about Solar Lithium Ion/Polymer charger - v1.0

Post by adafruit_support_bill »

The battery will charge at the lower rate. Just slower.

You can use a larger panel. You can also connect multiple panels - but you should add blocking diodes to prevent reverse current through a shaded cell. Trying to regulate the voltage of a higher voltage cell would be inefficient.

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bridges_pdp
 
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Re: Question about Solar Lithium Ion/Polymer charger - v1.0

Post by bridges_pdp »

I've read the info about setting the charge current but I'm confused. The Prog1 has a SMD resistor already in place that sets the current at 500ma. Adding a 2.2k resistor will, according to the page, set the current to about 950ma. Can someone tell me what configuration would provide for the maximum safe charge current?

Thanks,

Scott

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adafruit_support_bill
 
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Re: Question about Solar Lithium Ion/Polymer charger - v1.0

Post by adafruit_support_bill »

2K in parallel with the existing 2K will give you 1k. Or you can remove the existing SMT resistor and solder in a 1k
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