DIY Solar Panel Handphone Charger not working

[sdold]

I'd probably use something like a 1N4001 instead of a 1N4148. The 1N4148 is just a switching diode, it seems small for something like this.

Thanks you!!

[SunEagle]

I think That since the battery your using is 3.7V and the panel itself is 4V. The panel isnt charging the battery.

On a sunny day that panel might not be producing exactly 4V.

And when charging a battery you need like 5.5 volt. So on a sunny day if you test and see if you making over 5 Volts then it maybe charging the battery then.

But im not the one you should be listening to Im a Newb as well with this stuff.

You need more Volts charging A battery of a 3.7 caliber

I believe your answer is correct. The charging voltage needs to be over 4 for a 3.7v battery system.

I think That since the battery your using is 3.7V and the panel itself is 4V. The panel isnt charging the battery.

On a sunny day that panel might not be producing exactly 4V.

And when charging a battery you need like 5.5 volt. So on a sunny day if you test and see if you making over 5 Volts then it maybe charging the battery then.

But im not the one you should be listening to Im a Newb as well with this stuff.

You need more Volts charging A battery of a 3.7 caliber

[Nakamaru]

by the way, i followed this tutorial online expect i replaced the 2x AA battery with an 18650 battery.

src : www.Kipkaykits.com

[Nakamaru]

Just found out that the diode is reversed. curse you diode!!!!!

You have to have a panel capable of ovderproducing what the charger can consume.

So you're saying that i should strap 2 panels in series or parallel ? or buy a new panel ?

Well those are the ones Ive found and they work. Just givin the guy the right product to buy

[inetdog]

This one is MPPT Capable. These Are the droids you been lookn for.

http://www.ebay.com/itm/281881773155...%3AMEBIDX%3AIT

Except for the fact that this CC requires a minimum of 6V DC and the OP does not have that.

This one is MPPT Capable. These Are the droids you been lookn for.

http://www.ebay.com/itm/281881773155?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[Mike90250]

your chip is not MPPT capable. It wants to have power from a voltage source, and a PV panel is a current source, so it nearly instantly overloads the PV, and crashes the voltage.
You have to have a panel capable of ovderproducing what the charger can consume.

Battery

got 0.2v on the battery

is dangerously discharged, beware, it may ignite after being charged

From my understanding those chips arnt used for solar. But it shouldnt matter. I have the same chips too.
I think maybe your solar panel is to weak to charge the battery. But Im not a expert on this matter I'd wait till Mike or someone like that to tell you what your problem is.
?

Here is the chip on ebay
http://www.ebay.com/itm/141870592094...%3AMEBIDX%3AIT

Input voltage: 0.9V-5V DC
Transfer efficiency:96%(max)
With USB port
With working indicator light
with one AA battery power supply output current can up to 200~300mA,
two AA batteries to the output current of 500~600mA

[Nakamaru]

Oh, by the way the solar panel gets 5.5v on sunlight and gets 0.6v with the battery connected to it.

[Nakamaru]

So, I am currently making a diy solar panel charger with an 18560 2200 mAh battery, a cheap 5v 350 ma solar panel, a random diode i found on a toy electronic kit, and a step up 0.9v-5v to 5v chip thing. once i'm done soldering, i immediately put it outside of my house and let it charge. i left it for like 3 hours and i checked the battery using my multi meter and got 0.2v on the battery. it is not charging is it. can you guys help me found my problem ? oh, and here's some picture and a crappy drawing of mine