FreeLists / 18650 / [18650] Re: BMS Controller

["Davide Andrea" <1davide@xxxxxxx>]

I'm buried in work. I'm off to Germany. Please be patient.
Thanks
Davide

----- Original Message -----
From: "Edward Ang" <EdAng@xxxxxxxxxxxxxx>
To: <18650@xxxxxxxxxxxxx>
Sent: Friday, October 01, 2004 6:02 PM
Subject: [18650] BMS Controller


> Davide,
>
> I think we missed an important component of our system.  On your block
> diagram, you drew a "Pack V and I Sensor Addr:0" block.  But, we do not
have
> any details on this module.  Are you envision this to be another BMS
module
> with special features or are you envision this to be part of the BMS
> controller function?  Or, it is a PIC reading measurement from the Emeter?
>
> On my side, I have gotten my new PFC-30 charger and a few 10k digipots.  I
> am starting to play around with them using a PIC18F258.  This PIC has
USART,
> SPI, and also CAN that could be used at the same time.  We might have to
use
> PIC18F458 which also have parallel port features later.
>
> For now, I plan to modify my PFC-30 to be RS-232 controlled with the
> following features:
> 1)  Increase/reduce charging voltage
> 2)  Increase/reduce charging current
>
> Future features:
> 3)  Accept calibration data
> 4)  Control charger with several different charging curves
> 5)  Record # of completed charge cycles
> 6)  Decide to use a different curve upon completion of a certain number of
> cycles
>
> I have also decided to build a lead acid BMS based on what we have so far.
> Since it is so similar, it would not need a lot of effort.  It is like
> killing 2 birds with one stone.  And, current EVs with lead acid batteries
> do need a complete BMS system.  There isn't a complete system available.
> Any LiIon system is not going to be available for at least a year or 2 or
> more.  And, EV owners might not decide to switch to LiIon later.  This
would
> allow us to put more "beta" units out there to fully debug the high level
> control algorithm and GUI.
>
> Ed Ang
> AIR Lab
> (510)673-7602
>
>
>