Building a Battery using LifePO4 38120 Headways cells

Hey all,

I'm in need of some help building battery using lifepo4 38120 headway cells. They are 3.2v at 8mps per cell. I have (12) Cells. What I need help in is how to connect them so I can get 12v and whatever amperage this becomes.

Can anyone help me with the configuration of the battery?

Thanks

James

Top Replies

Robert Peter Oakes 25 days ago +2

you wont get 12V exactly, your choice would be 9.6V (3 series batteries) by 32 Amps (4 parallel batteries) in series with 2 more packs resulting in a 3S4P set. or 12.8V (4 series batteries) built with…

0 Robert Peter Oakes 25 days ago

you wont get 12V exactly, your choice would be 9.6V (3 series batteries) by 32 Amps (4 parallel batteries) in series with 2 more packs resulting in a 3S4P set. or

12.8V (4 series batteries) built with 3 batteries in parallel for each set resulting in 24 Amps or 4S3P as they say. you will need a balance charger for it
Cancel
Vote Up +2 Vote Down

Sign in to reply

Verify Answer

Cancel
0 michaelkellett 24 days ago

You will need to check the spec of the batteries but one issue with lithium batteries is the greater range of operating voltage than lead acid.

4 batteries will give you 14.4V when fully charged and just under 12V when discharged.

The faster you discharge them the less energy you will get out - this is true for all batteries.

What load will you be driving ?

Robert Peter Oakes is right to suggest that you will need a proper balanced charger.

MK
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Robert Peter Oakes 24 days ago in reply to michaelkellett

These are not LiPo, there lifepo4 and are lower voltage even when charging so more important to get the matching charger/balancer
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 michaelkellett 24 days ago in reply to Robert Peter Oakes

eclipsebikes.com/.../headway-lifepo4-38120hp-32v-8ah-p-194.html

3.6V fully charged, 4 * 3.6 = 14.4

Lithium Ion or polymer closer to 4V so 16V for 4 fully charged.

MK
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Building a Battery using LifePO4 38120 Headways cells

Top Replies

eclipsebikes.com/.../headway-lifepo4-38120hp-32v-8ah-p-194.html