Difference between revisions of "Lithium Ion Charger"
From Francois Louw
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__TOC__ | __TOC__ | ||
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| − | + | =Basic Single Cell Lithium Ion Battery Charger (MCP73831)= | |
I have a bunch of 18650 lithium cells laying around, empty, but no means of charging them. So lets build a small battery charger to charge them. | I have a bunch of 18650 lithium cells laying around, empty, but no means of charging them. So lets build a small battery charger to charge them. | ||
The purpose is to make a small charger that I can use with any Lithium Ion cell to charge. The 18650 cells that I have are 2700mAh cells, and charging at just under 500mA takes about 6.5 hours to charge a single cell form empty to full. This is not a good solution to charge big cells, but it gets the job done. Maybe in the future I will make a faster charger for those cells. | The purpose is to make a small charger that I can use with any Lithium Ion cell to charge. The 18650 cells that I have are 2700mAh cells, and charging at just under 500mA takes about 6.5 hours to charge a single cell form empty to full. This is not a good solution to charge big cells, but it gets the job done. Maybe in the future I will make a faster charger for those cells. | ||
| − | + | =Specifications= | |
*Single cell charger | *Single cell charger | ||
*Small | *Small | ||
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*Indicator LEDs | *Indicator LEDs | ||
| − | + | =Hardware and Schematic= | |
'''BOM''' | '''BOM''' | ||
*[http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en024903 Microchip MCP73831] | *[http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en024903 Microchip MCP73831] | ||
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I didnt make a proper PCB for this project, I used a small SOIC header board as a base and soldered the components onto it. Not pretty but it works. | I didnt make a proper PCB for this project, I used a small SOIC header board as a base and soldered the components onto it. Not pretty but it works. | ||
| − | + | =Results= | |
That is it. Nothing more needs to be done. Tested and it works. Charged a 280mAh cell in 45min. The 2700mAh cells take forever to charge (6-7 hours) but it works. | That is it. Nothing more needs to be done. Tested and it works. Charged a 280mAh cell in 45min. The 2700mAh cells take forever to charge (6-7 hours) but it works. | ||
