12-01-2019, 11:04 AM
|
#81 (permalink)
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203
Thanks: 2,501
Thanked 2,587 Times in 1,554 Posts
|
Thanks guys. Stubby, that is the plan. I think I have an 80A relay kicking around from my old Metro alt delete.
|
|
|
Today
|
|
|
Other popular topics in this forum...
|
|
|
12-30-2019, 05:42 AM
|
#82 (permalink)
|
Master EcoModder
Join Date: Jan 2017
Location: Istanbul
Posts: 1,245
Thanks: 65
Thanked 225 Times in 186 Posts
|
I was just browsing alternators and saw a Valeo unit that claims to have a clutch.
|
|
|
12-30-2019, 01:40 PM
|
#83 (permalink)
|
Master EcoModder
Join Date: Sep 2012
Location: Victoria, BC
Posts: 1,747
Thanks: 75
Thanked 577 Times in 426 Posts
|
Quote:
Originally Posted by teoman
I was just browsing alternators and saw a Valeo unit that claims to have a clutch.
|
One-way clutches are becoming more common on modern engines...it's easier on the belt and gives a small boost in efficiency.
|
|
|
The Following User Says Thank You to Stubby79 For This Useful Post:
|
|
12-30-2019, 02:36 PM
|
#84 (permalink)
|
Not Doug
Join Date: Jun 2012
Location: Show Low, AZ
Posts: 12,230
Thanks: 7,254
Thanked 2,229 Times in 1,719 Posts
|
Both of those advantages seem nice, but when I searched for alternators with clutches I saw a bunch of people complaining theirs went out.
__________________
"Oh if you use math, reason, and logic you will be hated."--OilPan4
|
|
|
12-31-2019, 01:24 AM
|
#85 (permalink)
|
Master EcoModder
Join Date: Jan 2012
Location: United States
Posts: 1,756
Thanks: 104
Thanked 407 Times in 312 Posts
|
The fan and bearings and brush eat up maybe what 100 watts at redline? Okay that's kind of significant but if it really bothers you, you can remove the stamped steel fan and wire in a 12V fan. Active rectifier + higher copper fill stator solve most of the alternator efficiency problem.
|
|
|
12-31-2019, 04:45 PM
|
#86 (permalink)
|
Master EcoModder
Join Date: Dec 2010
Location: USA
Posts: 1,171
Thanks: 352
Thanked 268 Times in 215 Posts
|
When you get the hang of this you should swap to Arduino. Free programming interface, boards are like $10 now, and all of your high low temp guard, high low voltage guard, high low amp guard can all be programmed into the if-then statements of the program body. Its a lot of fun when you get in there. A lot of cheap and easy to implement sensors available.
Raspberry pi is fun too. You can set them up to output to a display as well for live info on your electric system.
__________________
"I feel like the bad decisions come into play when you trade too much of your time for money paying for things you can't really afford."
|
|
|
12-31-2019, 08:56 PM
|
#87 (permalink)
|
Master EcoModder
Join Date: May 2019
Location: California
Posts: 513
2020 - '08 Chevy Tahoe H Last 3: 18.4 mpg (US) 2021 - '08 Chevy Tahoe H 90 day: 17.08 mpg (US) 2022 - '08 chevy Tahoe LT Last 3: 14.38 mpg (US) 2023 - '08 Chevy Tahoe Last 3: 22.61 mpg (US) 2024 - '08 Chevy Tahoe 90 day: 22.35 mpg (US)
Thanks: 2
Thanked 105 Times in 96 Posts
|
Quote:
Originally Posted by MetroMPG
I like this idea!
I'd be surprised if nobody in the history of EcoModder has ever done this before (I once thought about doing it with a DC-DC converter powered by 24v).
But the difference today is the availability of cheap used cells and cheap electronics to make it work - almost plug 'n' play.
Planning to try it out?
|
any Idea if that lithium battery can supply 100-120amps of power?
with everything going were looking at 120-140amps or so in autostop with the A/C on fans going etc..
just the transmission Aux pump requires upto 40-50amps...(sure the peak current is a bit higher)
in that case i would look more into using Super/ULTRA capacitors
to butter up the lead acid battery...
do yo know what the current draw is with the alternator off? if it's more then 10 amps(some rated upto 20amps) you will pop the fuse for the 12 volt socket on the spot
Last edited by Tahoe_Hybrid; 12-31-2019 at 09:16 PM..
|
|
|
04-14-2020, 08:40 PM
|
#88 (permalink)
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203
Thanks: 2,501
Thanked 2,587 Times in 1,554 Posts
|
I picked up this project today and got the pack assembled this time with the bus bars installed. Assembly was a pain in the butt. Getting all the cells to line up correctly just doesn't happen very well. But its together solidly now!
|
|
|
The Following 2 Users Say Thank You to Daox For This Useful Post:
|
|
04-17-2020, 05:21 PM
|
#89 (permalink)
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203
Thanks: 2,501
Thanked 2,587 Times in 1,554 Posts
|
Here is the initial plan for all the components. The pack resides in the bottom because it has the most weight and that'll stabilize things. The yellow blocks are the AC power supplies. The smaller red blocks are the dc/dc converters for the charging side of things. The bigger blue block is the output dc/dc converter. Finally the smaller darker blue block is the low voltage disconnect.
There is still obviously work to do on it (handles, power button, etc), but its getting closer. I'm still debating on adding a fan to this thing.
|
|
|
04-18-2020, 05:29 PM
|
#90 (permalink)
|
Administrator
Join Date: Dec 2007
Location: Germantown, WI
Posts: 11,203
Thanks: 2,501
Thanked 2,587 Times in 1,554 Posts
|
Printed out the dc-dc converter mount. It is installed and is solid and fits perfectly.
|
|
|
|