For choosing solar cell you must choose.
Li ion solar charger ic.
Here is a tried and tested sample circuit of a li ion battery charger that can be used to charge any 3 7v li ion battery using a 5vdc usb solar panel power supply.
Conditioning constant current and constant voltage with an ic thermal protection and safety timer.
I use same.
The bq24210 device is a highly integrated li ion linear charger targeted at space limited portable applications.
From the batteries you can run any mains appliances using appropriate inverters.
For li ion battery i choose solar cell with 5v and 160 ma.
The above discussed li ion battery solar charger circuit using transistors along with auto cut offs works extremely well for almost any small range solar controller programs for instance for charging cellphone battery packs or other styles of li ion battery packs correctly.
Charging li ion battery can be critical a li ion battery as we all know needs to be charged under controlled conditions if it s charged with ordinary means could lead to damage or even explosion of the battery.
Utilize our battery charger parametric search tools to quickly find the best charger to fit your design specifications.
The second simple design explains a straightforward yet precise automatic li ion battery charger circuit using the ubiquitous ic 555.
Open in new find other battery charger ics description.
As a beginner s solar project i have designed a very simple solar battery charger to charge 18650 li ion batteries.
Voltage of solar cell 1 5 x voltage of battery so 3 7v to 4 2 v of li ion is equivalent of 5 55 v to 6 3 v of solar cell.
Setup an array of solar panels on rooftop connect them to a solar charge controller and charge the batteries.
However ltc4054 should be soldered on an sot 23 adapter with header pins for ease of experimentation and appropriate holder for the 18650 li ion battery is an absolute must.
The charger is made by using a most popular ic tp4056 the tp4056 ic is a complete constant current constant voltage linear charger for single cell lithium ion lithium polymer liion lipo batteries.
Current of solar cell should have 1 10th of capacity battery diveded by 1 hour for ni mh batteries.
The battery is charged in three phases.
Whether you need a single cell linear charger for space constrained applications or a single to multi cell switching charger with high charging current for fast and cool charging our quick search will help you find the right charger.