hey all back to the battery stuff. I have a lithium-ion battery which is 3.7v @ 1000mAh.
Any thoughts on how to charge it? Some links perhaps?
I read some stuff but not sure. What is this stuff about cells?
How do i know how many cells are in the battery if its a square solid? Or is that just 1? lol
hey all back to the battery stuff. I have a lithium-ion battery which is 3.7v @ 1000mAh.
Any thoughts on how to charge it? Some links perhaps?
I read some stuff but not sure. What is this stuff about cells?
How do i know how many cells are in the battery if its a square solid? Or is that just 1? lol
The basic Li-ion battery chemistry has a single cell nominal voltage of 3.7vdc, therefore in your case you have a single cell. Basically they have a charge method of using a constant current (amount depends on cell MA rating) followed by using a constant voltage once it approaches 4.2 volts. It's important not to overcharge as fire is a real possibility. Also a cell can suffer permanent damage if over discharged, so most items using these kinds of batteries have a auto-turn off when cell reaches around 3 volts or so.
Lots of literature out on these cells and their proper use. Many devices designed to utilize these type cells have a special charger chip embedded into the device.
Why not use Scott Henion's charger? Very versatile and has been built and used my many....I even built and modified it to charge SLA batteries....link is here: SHDesigns - Lithium Ion Charger
You need a sense circuit to monitor the current flowing into the battery...set the cut off threshold to a value and then arrange some sort of disconnect...could be a relay or you could use a transistor that is placed in the +ve line to the battery which is turned off when the cell is full....
You need a sense circuit to monitor the current flowing into the battery...set the cut off threshold to a value and then arrange some sort of disconnect...could be a relay or you could use a transistor that is placed in the +ve line to the battery which is turned off when the cell is full....