themrbruceguy
10 µW
Hey there! I am new to posting here, but have been a reader for quite some time (as well as watching way too many YouTube videos on the topic :wink: ) I am very interested in (someday) converting a 60's/70's Honda to electric for commuting to and from work, primarily. But before I tackle that big of a job, I would like to get some practice with something smaller.
I own a 1974 Honda CB350F which is in need of a new battery, and I think this would be a great opportunity to start learning about this hobby. For starters, I know that connecting cells in series increases voltage and that connecting cells in parallel increases amperage. But what I can't seem to understand is how to design the pack in order to match the old battery's cold cranking amps.
Here is the old battery that I am aiming to replicate/replace: https://shoraipower.com/lfx14a5-bs12-backorder--p74
Cold cranking amps (CCA) obviously relates to the pack's ability to discharge current. The reference pack claims 210CCA. Could someone help me understand the math behind building a pack that matches 210CCA?
My best guess is this (correct me if I'm wrong, which is very likely):
Am I thinking about this correctly? Or is that completely wrong?
Thanks! Excited to learn!
~ Jake
I own a 1974 Honda CB350F which is in need of a new battery, and I think this would be a great opportunity to start learning about this hobby. For starters, I know that connecting cells in series increases voltage and that connecting cells in parallel increases amperage. But what I can't seem to understand is how to design the pack in order to match the old battery's cold cranking amps.
Here is the old battery that I am aiming to replicate/replace: https://shoraipower.com/lfx14a5-bs12-backorder--p74
Cold cranking amps (CCA) obviously relates to the pack's ability to discharge current. The reference pack claims 210CCA. Could someone help me understand the math behind building a pack that matches 210CCA?
My best guess is this (correct me if I'm wrong, which is very likely):
- Cell - LittoKala 18650 3.7V 3000mAh https://www.aliexpress.com/item/327...o.store_pc_groupList.8148356.1.46a91b09cCL7UY
- A configuration of 3s7p gives a 12.6V pack with 21Ah of capacity
- Each cell (according to the manufacturer's website) is rated at 30A continuous discharge
- So with 7 cells in parallel, assuming they are all discharging at 30A, yields a total discharge of 210A
Am I thinking about this correctly? Or is that completely wrong?
Thanks! Excited to learn!
~ Jake