Got a "Battery saver active" message yesterday - Chevy Bolt EV Forum
User Tag List

 9Likes
Reply
 
Thread Tools
post #1 of 11 (permalink) Old 06-10-2019, 09:39 AM Thread Starter
Senior Member
 
Coastal_Cruiser's Avatar
 
Join Date: Dec 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
(Thread Starter)
Got a "Battery saver active" message yesterday

Six months in, 13K miles. Had my first bit of trouble. A "Battery saver active" message appeared on the display several times throughout the day. The high voltage battery was well over half charged. Did not have a volt meter with me to check voltage of 12v battery. The only unusual item was that it was the hottest day of the year in Central CA, and I was running the air conditioner continuously for the first time. However the message continued to pop up later in the day after it had cooled off and AC was no longer in use.

Tried to diagnose via Onstar but was having difficulties that Onstar could not correct at the time. Can't get the car in to the dealer (Plan Z) for a few days. I noticed all the "Battery saver active" threads appear to be from 2017.

Checked 12v battery voltage this morning and it is 13.7v (car was plugged into 120v all night and shows a GOM of 100 miles). Fluid levels all good. I only drive the car on weekends, but will keep watch out next week for any recurrence. Just curious if you guys had any thoughts.

Last edited by Coastal_Cruiser; 06-10-2019 at 09:42 AM.
Coastal_Cruiser is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 06-10-2019, 10:56 AM
Senior Member
 
Join Date: Apr 2018
Posts: 341
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 170 Post(s)
I'm also concerned about the 12v functioning of the Bolt. I recently got a little device that plugs into the "cigarette lighter" of the Bolt that constantly reads the functioning of the 12v system from Amazon (Palumma car charger). Very interesting to watch. It reveals a pattern of recharging the battery after a start to 14.9v for a few seconds, then settles down to about 12.6v after a minute. As the battery drops, you see the cars computer charger kicking in at 12.5 to bring the voltage back to 12.6. Any variation from the above pattern will be easily detectable, and will lead me to do a battery load test to check the integrity of the battery. (There is a separate thread on load testing the battery).

When you think about it, all of the cars' computer electronics and sensors are dependent on the good functioning of a lousy lead acid battery. It seems to me that insuring that it is in good shape is key to proper functioning of the Bolt.
The Other Tom likes this.
psyflyjohn is online now  
post #3 of 11 (permalink) Old 06-10-2019, 11:08 AM Thread Starter
Senior Member
 
Coastal_Cruiser's Avatar
 
Join Date: Dec 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
(Thread Starter)
Quote:
Originally Posted by psyflyjohn View Post
When you think about it, all of the cars' computer electronics and sensors are dependent on the good functioning of a lousy lead acid battery. It seems to me that insuring that it is in good shape is key to proper functioning of the Bolt.
Yeah. As some likely know, Tesla's approach to that issue when they designed the Model 3 was to run more 12v systems off the traction battery via a DC-DC converter. The approach lessens dependence on the 12v battery and also allows for fewer charging/discharging cycles, thereby lengthening the life of the 12v battery.

PS - thanx for the tip on the 12v system reader. Will be ordering today.

Last edited by Coastal_Cruiser; 06-10-2019 at 11:38 AM.
Coastal_Cruiser is offline  
Sponsored Links
Advertisement
 
post #4 of 11 (permalink) Old 06-10-2019, 01:34 PM
Senior Member
 
GregBrew's Avatar
 
Join Date: Jan 2018
Location: Huntington Beach, CA
Posts: 2,202
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 968 Post(s)
Garage
Quote:
Originally Posted by psyflyjohn View Post
I'm also concerned about the 12v functioning of the Bolt. I recently got a little device that plugs into the "cigarette lighter" of the Bolt that constantly reads the functioning of the 12v system from Amazon (Palumma car charger). Very interesting to watch. It reveals a pattern of recharging the battery after a start to 14.9v for a few seconds, then settles down to about 12.6v after a minute. As the battery drops, you see the cars computer charger kicking in at 12.5 to bring the voltage back to 12.6. Any variation from the above pattern will be easily detectable, and will lead me to do a battery load test to check the integrity of the battery. (There is a separate thread on load testing the battery).

When you think about it, all of the cars' computer electronics and sensors are dependent on the good functioning of a lousy lead acid battery. It seems to me that insuring that it is in good shape is key to proper functioning of the Bolt.

In 22 years of driving EVs, I've found that the 12V PbA auxiliary battery is *absolutely* the Achilles Heel of any EV that has one.
psyflyjohn, ZoomZoom and MarksBolt like this.

Driving electric since 1997!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
GregBrew is online now  
post #5 of 11 (permalink) Old 06-10-2019, 01:51 PM Thread Starter
Senior Member
 
Coastal_Cruiser's Avatar
 
Join Date: Dec 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
(Thread Starter)
Quote:
Originally Posted by GregBrew View Post
In 22 years of driving EVs, I've found that the 12V PbA auxiliary battery is *absolutely* the Achilles Heel of any EV that has one.

Two words: Super Capacitor.


As best I can make of the anecdotal evidence turning up, the issue seems quite simple; the DC-DC converter/charger cannot (or software will not allow it to) charge the 12v battery faster than its being drained.

----------------------

Anyway, just got off the phone with the dealer. The best info drawn from the phone call is that they have seen the error before.... it's always because the 12v was low ... and when charged it up all was OK.


As opposed to getting: "In each case it meant the 12v was dying and we replaced it under warranty."


In the latter case I would have made an appointment immediately. Given its the former, I will just drive the car awhile monitoring the low voltage system and see what happens.

Last edited by Coastal_Cruiser; 06-10-2019 at 04:17 PM.
Coastal_Cruiser is offline  
post #6 of 11 (permalink) Old 06-10-2019, 04:12 PM
Senior Member
 
GregBrew's Avatar
 
Join Date: Jan 2018
Location: Huntington Beach, CA
Posts: 2,202
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 968 Post(s)
Garage
Quote:
Originally Posted by Coastal_Cruiser View Post
Two words: Super Capacitor.


As best I can make of the anecdotal evidence turning up, the issue is as quite simple, as the DC-DC converter/charger cannot (or software will not allow) it to charge the 12v battery faster than its being drained.



----------------------

Anyway, just got off the phone with the dealer. The best info drawn from the phone call is that they have seen the error before.... it's always because the 12v was low ... and when charged it up all was OK.


As opposed to getting: "In each case it meant the 12v was dying and we replaced it under warranty."


In the latter case I would have made an appointment immediately. Give its the former, I will just drive the car awhile monitoring the low voltage system and see what happens.

Yup. The auxiliary battery doesn't need CCAs or a high capacity. It just needs a stable, high-enough voltage, under a small load.

Driving electric since 1997!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
GregBrew is online now  
post #7 of 11 (permalink) Old 06-10-2019, 04:27 PM Thread Starter
Senior Member
 
Coastal_Cruiser's Avatar
 
Join Date: Dec 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
(Thread Starter)
Sidebar

Quote:
Originally Posted by GregBrew View Post
Driving electric since 1997!

Greg, I notice your sig line has you in EVs since the 90's. Is it fair to assume your first was an EV-1? Do you have a list of all the EVs you've owned posted somewhere?
Coastal_Cruiser is offline  
post #8 of 11 (permalink) Old 06-11-2019, 12:34 PM
Senior Member
 
GregBrew's Avatar
 
Join Date: Jan 2018
Location: Huntington Beach, CA
Posts: 2,202
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 968 Post(s)
Garage
Quote:
Originally Posted by Coastal_Cruiser View Post
Greg, I notice your sig line has you in EVs since the 90's. Is it fair to assume your first was an EV-1? Do you have a list of all the EVs you've owned posted somewhere?

Yup. Leased three of them. I've posted it before, but have no idea where. I'll do it again, and keep it in a text file this time...

1997 GM PbA EV-1. Leased from 1997-1998. Recalled (and kept by GM) for safety reasons. (One burned.)
1999 GM NiMH EV-1. Leased from 1999-2001.
1997(a) GM PbA EV-1. Leased from 2000-2002. (Recalled and refurbished 1997s were leased again.)
2001 Totota NiMH RAV4-EV. Bought new. Owned 'til 2011. Sold for $20k.
1999 Ford PbA Ranger EV. Bought in 2001 ($6k) off fleet lease. Owned 'til 2003, (PbA died). Sold for $6k.
2001 Derbi PbA E-GPR conversion. Conversion by Todd at Electric Motorsport of Oakland. Still own.
2011 Nissan LiIon Leaf. Bought new. Still own.
2011 Chevrolet LiIon Volt. Bought new. Still own.
2017 Chevrolet LiIon Bolt. Bought new. Still own.

I plan to keep adding to the list...

Driving electric since 1997!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
GregBrew is online now  
post #9 of 11 (permalink) Old 06-11-2019, 02:22 PM Thread Starter
Senior Member
 
Coastal_Cruiser's Avatar
 
Join Date: Dec 2018
Posts: 128
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)
(Thread Starter)
Quote:
Originally Posted by GregBrew View Post
Yup. Leased three of them.
That is fantastic! You definitely have bragging rights. And THREE EV-1s. Interesting lineage in the details about those three cars.

Did you know that FF Coppola still has his EV-1?

Back when first got into EVs, when the Model 3 was announced, I read "The Car That Could" by Michael Shnayerson. He documented the development of the EV-1. What was interesting about the book was that it was published before GM stopped producing and started recalling. So, not politics. Just hard factual reporting.




Coastal_Cruiser is offline  
post #10 of 11 (permalink) Old 06-11-2019, 10:08 PM
Senior Member
 
Join Date: Oct 2018
Posts: 394
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 220 Post(s)
Quote:
Originally Posted by GregBrew View Post
Yup. Leased three of them. I've posted it before, but have no idea where. I'll do it again, and keep it in a text file this time...

1997 GM PbA EV-1. Leased from 1997-1998. Recalled (and kept by GM) for safety reasons. (One burned.)
1999 GM NiMH EV-1. Leased from 1999-2001.
1997(a) GM PbA EV-1. Leased from 2000-2002. (Recalled and refurbished 1997s were leased again.)
2001 Totota NiMH RAV4-EV. Bought new. Owned 'til 2011. Sold for $20k.
1999 Ford PbA Ranger EV. Bought in 2001 ($6k) off fleet lease. Owned 'til 2003, (PbA died). Sold for $6k.
2001 Derbi PbA E-GPR conversion. Conversion by Todd at Electric Motorsport of Oakland. Still own.
2011 Nissan LiIon Leaf. Bought new. Still own.
2011 Chevrolet LiIon Volt. Bought new. Still own.
2017 Chevrolet LiIon Bolt. Bought new. Still own.

I plan to keep adding to the list...
Greg, any idea if you think you'll dabble on what VW is coming out with or maybe a Tesla?
ZoomZoom is online now  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off

 
For the best viewing experience please update your browser to Google Chrome