What are these codes with Check engine light on - Page 3 - Fisker Buzz Forums
Fisker Buzz Forums

User Tag List

Reply
 
LinkBack Thread Tools
Old 12-27-2015, 09:33 PM   #21 (permalink)
Senior Member
 
JCMorrill's Avatar
 
Join Date: Jan 2015
Location: Scottsdale, AZ
Posts: 829
Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 254 Post(s)
Default

Here's my layman's understanding after having 2 modules replaced. Whenever you hook up to a charger, the car's computer will shut down the charger as soon as any cell reaches full charge. If there are other cells that are lagging significantly behind that first "full" one in charge level, the computer may (no way of knowing for sure) go into "cell balancing mode" and keep the charger looking like it's active for hours or days. It is not drawing a lot of power ... it's only doing "slow/trickle charging" of the remaining cells so as not to overcharge the "best charged cell". There isn't a reliable way to force cell balancing to happen, but the best way to hopefully get the computer to go into balance mode is to drive the car down to 0 Stealth miles -- which is more likely to have the computer register the charge imbalance. But, it will only happen if the computer thinks it wants to do it. Leaving it on the charger for an extended period will do nothing, once you see the charger go off. It's done. If it stays "active" for more than 6 hours (on a 220V charger), it's probably balancing and you should leave it for a whole day (or more) until it clicks off.
JCMorrill is offline   Reply With Quote
Old 12-27-2015, 11:50 PM   #22 (permalink)
Liked, but not well liked
 
Join Date: Jul 2015
Posts: 1,172
Mentioned: 132 Post(s)
Tagged: 1 Thread(s)
Quoted: 455 Post(s)
Default

Quote:
Originally Posted by shrowell View Post
Can you explain this "non-active balancing" a little further (or point me to somewhere on the forum where it has already been discussed)? How does keeping the car on the charger achieve this balancing? I assume the current drawn is minimal once the batteries reach full charge. What will keeping the charger active for a week (or so) actually achieve?

Given this advice is coming from you, PowerSource, I guess this is more than just theorizing.

Simon
A123 uses a very primitive way of balancing the pack, basically they are using a bleed resistor to limit current to "balanced" cells this strategy attempts to bring the out of balance cells to the same level. Essentially the pack is limited by the voltage of the weakest "paralleled" cell.

Issue here is it takes a very long time to balance the pack and this balance technique wastes a lot of energy in heat (which also requires extra energy for thermal management). There are many smarter ways to balance the pack. The one on the A123 pack is probably the cheapest way though.
PowerSource is offline   Reply With Quote
Old 12-28-2015, 12:27 AM   #23 (permalink)
Senior Member
 
shrowell's Avatar
 
Join Date: Mar 2015
Location: Southwest Florida
Posts: 349
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 131 Post(s)
Default

So... (and I'm thinking about saving $5k+ in battery module replacement here - sorry Pat), if I leave the charger plugged in and let the car's onboard charger take care of business, there's a chance that all the modules will eventually balance (to the lowest common denominator). Worth a go.

Thank you for the tip!

Simon
__________________
Simon

Fisker Karma EcoChic #1030 : Mercedes CLK63 AMG: Audi Q7 Prestige : Honda CBR1000RR

Forever!
shrowell is offline   Reply With Quote
 
Old 12-28-2015, 06:22 AM   #24 (permalink)
Senior Member
 
FiskerPhilly's Avatar
 
Join Date: Nov 2013
Posts: 1,077
Mentioned: 157 Post(s)
Tagged: 0 Thread(s)
Quoted: 309 Post(s)
Default

@carnutdr I emailed you we will get it taken care of. Love the Gotti story, he's a mafia legend around here lol.
__________________
EVolution Autosports
EV & Hybrid Performance
Fisker Specialists
[email protected]
FiskerPhilly is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Malfunction Indicator Light/Check Engine Light LonePalmBJ Fisker Karma 132 06-14-2020 04:32 AM
check engine light P0A80 icediggity1 Fisker Karma 23 09-07-2016 09:54 AM
Engine check light Fred Crook Fisker Karma 32 03-30-2015 09:11 PM
Engine light check Joe ni Fisker Karma 6 11-04-2014 07:14 PM
Intermittent Check Engine light VancouverKarma Fisker Karma 1 01-04-2014 07:36 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -4. The time now is 03:27 AM.



Powered by vBulletin® Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0 PL2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.