Charging a 3.1V lithium ion cell battery

[surfline]

Hello,

I am trying to charge a 3.1V lithium ion rechargeable battery (The Sekio MS621FE-FL11E). Most information I have found on charging lithium ion batteries talk about charging it to 4.1 to 4.2 Volts in one of the charge cycles. I believe this is for batteries that have nominal voltage of 3.7 Volts? In my situation I'm using a 3.1V battery so certainly I don't want to charge it to 4.2 volts? Are there any battery charger IC's for 3.1V lithium ion batteries?? Or circuit schematics?

Thanks,

Surfline

 

[Hero999]

You need to charge it to 4.2V otherwise it wouldn't fully charge.

Limit the current to 0.5C, charge until the voltage reaches 4.2V, disconnect when the current drops below 0.1C.

 

[bountyhunter]

Hello,

I am trying to charge a 3.1V lithium ion rechargeable battery (The Sekio MS621FE-FL11E). Most information I have found on charging lithium ion batteries talk about charging it to 4.1 to 4.2 Volts in one of the charge cycles. I believe this is for batteries that have nominal voltage of 3.7 Volts? In my situation I'm using a 3.1V battery so certainly I don't want to charge it to 4.2 volts? Are there any battery charger IC's for 3.1V lithium ion batteries?? Or circuit schematics?

Thanks,

Surfline

Do you have a sped sheet for the battery? I never heard of a 3.1V Li battery.

EDIT TO ADD: The ads for the battery do call it a "3.1V rechargeable Li battery". Data sheet:

https://www.electro-tech-online.com/custompdfs/2009/08/321180.pdf.

 

[Hero999]

It looks fairly simple, just connect to a 3.3V regulated supply via a suitable series resistor, see data sheet.

What are you going to power using these tiny cells? They're designed for very low current applications.

 

[tytower]

Looking at that data sheet then I am interested in what it shows.
Here is the specs bit

So what are they saying , on the first line that battery has a normal voltage of 3Volts.
An ability to supply (capacity of) 1milliAmp per second for 1 hour .
Discharge it at 10 micro Amps per second generally and maximum 100 microAmps ?
Charge it at 10 microAmps/sec with a constant voltage of 3.1Volts and regulate the charge current with a resistor to drop it to 10microAmps/sec.
If discharged to 80% of its nominal voltage (which is 3.1V so at 2.8Vrecharge it ) then recharged it will last for 1000 cycles.
If discharged to 0V then recharged you will only get 100 cycles out of it.

Am I reading this right?

 

[audioguru]

It is a tiny useless little battery. It is completely different to a normal lithium rechargeable battery.