forum GNU Linux PowerPC Notebook

Hardware => Suggestions => Topic started by: stefano.t on October 29, 2015, 02:29:01 PM

Title: Battery
Post by: stefano.t on October 29, 2015, 02:29:01 PM

Hi all,

Looking for some technical specifications about battery in the forum, I didn't find anything, so I have some questions and suggestions regarding it.

• Has anyone evaluated the total amount of current, in order to define battery requirements?
• In a "Open Hardware" obviously we cannot mount a proprietary cell pack (ex: an HP laptop battery pack), but it's necessary to design a specific one. Some considerations, based on my job experience:
     
  • A custom solution is unfortunately a very expensive solution (I think total cost could be more than 100 euro)
  • For small productions like this project, manufacturers could change package dimensions or close production without any notice.
    
  
  My suggestion is to find possibly more than one manufacturer and a package as common as possible, in order to fit different products in the same area reserved in the chassis.
  Has anyone already looked for battery solutions?

Stefano

Title: Re: Battery
Post by: argoste on November 07, 2015, 05:41:37 PM

Could we go the same solution of used by Novena?
They use RC battery pack. Easy to find, choose the size you want.
A dedicated board manages the power (running a Real Time OS).
http://www.kosagi.com/w/index.php?title=Novena_Main_Page

Title: Re: Battery
Post by: argoste on November 07, 2015, 05:44:28 PM

This is an example of RC battery pack.
[https://images.duckduckgo.com/iu/?u=http%3A%2F%2Fecx.images-amazon.com%2Fimages%2FI%2F41nmQISoymL.jpg&f=1][/img]

Title: Re: Battery
Post by: argoste on November 07, 2015, 05:57:51 PM

My previous post was inaccurate.
Of course a LIPO battery is more appropriate.
http://www.rcplanet.com/Traxxas_5000mAh_11_1_volt_3_cell_25C_LiPo_with_iD_p/tra2872x.htm

Title: Re: Battery
Post by: stefano.t on November 19, 2015, 10:08:54 PM

Hi argoste,

good job! Battery you posted is perfect for a notebook application: voltage, charge, dimensions are all compatible for a notebook. Maybe a different connettor would be better  ;D
Considering the different consumer applications for these types of battery packs, I think it's possible to obtain a custom battery for a notebook without any particular effort.

Stefano

Title: Re: Battery
Post by: cyrano on May 31, 2016, 04:16:04 AM

Please just include a battery holder for standard 18650 cells. That would make it easy to replace for anyone and every one can choose the cheapest or the highest capacity cells.

Even a Tesla is driven by 18650 cells. Probably a bit more than a laptop, though ;-)

Title: Re: Battery
Post by: Carlos on May 31, 2016, 01:08:39 PM

I second that.