Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Li ion battery packs with BMS

Li ion battery packs with BMS

Li ion battery packs with BMS


I am to assemble Li Ion battery packs to power my boat motor. I have found batteries (Samsung 30Q, 3000mAh), racks and nickel strips for assemble. However I have difficulties finding a proper BMS system.

My plan was to make 5 modules of 12S10P , giving me approx 48V at 30Ah for each module. Then wire the 5 modules together in parallel and get 150Ah in total. Each module would than have 12S10P BMS for at least 30Ah. But the supplyer could not recommend this setup.

My mayor is mechanical engineering. I did a lot of research on battery packs but still missing out on the BMS.

What sort of BMS system am I looking for?

RE: Li ion battery packs with BMS

Recharge via solar long term, or by plugging into the dock? Or will the boat be left under tarp and be covered up out of the water on a trailer between trips?

RE: Li ion battery packs with BMS

Plan is to charge when in dock. However solar panels are plans for the future ;)

RE: Li ion battery packs with BMS

Motor input should be 48V and it can deliver 9kW.

I do not know. I planned to connect the 5 packs in parallel and charge them all together.

RE: Li ion battery packs with BMS

Batteries I intended to use is Samsung 30Q Li Ion 18650 batteri. Each battery is 3.7V, capacity of 3Ah and CDR (continuous discharge rates) of 15A. Which gives my 5x 10series enough to power the motor.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


eBook - Functional Prototyping Using Metal 3D Printing
Functional prototypes are a key step in product development – they give engineers a chance to test new ideas and designs while also revealing how the product will stand up to real-world use. And when it comes to functional prototypes, 3D printing is rewriting the rules of what’s possible. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close