RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
 

Go Back   Thor Forums > Thor Tech Forums > Motorhome Tech Topics
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 02-18-2019, 10:33 PM   #1
Axis/Vegas Enthusiast
 
JamieGeek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 9,171
THOR #1150
Novel Nissan battery pack

This is interesting: Nissan will be selling the "Roam" a battery pack for campers made up of "used" EV batteries:
https://www.engadget.com/2019/02/18/...mping-trailer/
__________________

__________________
2014 Thor Axis 24.1
2018 Chevy Bolt
blog - https://spareelectrons.wordpress.com/
JamieGeek is offline   Reply With Quote
Old 02-24-2019, 02:15 PM   #2
Senior Member
 
Brand: Still Looking
State: Texas
Posts: 4,822
THOR #2121
Jamie, do-it-yourself repurposing of Nissan batteries by guys with lots of electrical knowledge and experience does not seem that uncommon, so maybe something you may want to look at also.

A friend and I were looking at option of buying Nissan battery modules to assemble a 48-Volt battery, around 10kWh in capacity, and it came out to around $200 per kWh for the used modules. To that you have to add cost of battery management and all connection hardware to connect a bunch of modules in combination of series and parallel.

There is risk involve though. If modules are old they may not perform well, and if newer but from a wrecked car they could have damage. Regardless, itís an idea we are still thinking about in combination with 48-Volt inverter/charger.

The power unit in your post, if accurate that itís only 700 Wh, seems pretty large for whatís no more energy than a common RV battery at roughly 50% discharge. Iím not sure what you get beyond installing an AGM in the trailer and using a small inverter. I suppose portability is a plus, so when done camping it can be taken inside house. Or at campground you can move unit away from RV to power devices. Not something I personally find very useful for our kind of camping.
__________________

__________________
Chance is offline   Reply With Quote
Old 02-25-2019, 03:34 AM   #3
Senior Member
 
Brand: Thor Motor Coach
Model: SOB 2014 Meridian 36M
State: Washington
Posts: 980
THOR #7205
I got to thinking about used battery modules last summer. Not being an electrical guy, I was wondering what it would take to use a "battery pack" from a Ford C-Max like my wife drives. Would it have to be taken apart and reconfigured into a usable size voltage? Or, could it be reduced electronically? It seems like the RV world could use a new source of battery power like this. Lighter, faster charging... I only know enough to drive myself crazy with questions! LOL
__________________
Pat & Becky & now Katie
Wenatchee, WA
99dart is offline   Reply With Quote
Old 02-25-2019, 12:02 PM   #4
Axis/Vegas Enthusiast
 
JamieGeek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 9,171
THOR #1150
Quote:
Originally Posted by 99dart View Post
I got to thinking about used battery modules last summer. Not being an electrical guy, I was wondering what it would take to use a "battery pack" from a Ford C-Max like my wife drives. Would it have to be taken apart and reconfigured into a usable size voltage? Or, could it be reduced electronically? It seems like the RV world could use a new source of battery power like this. Lighter, faster charging... I only know enough to drive myself crazy with questions! LOL
Well there is this: (They took a Tesla battery module and put it in their RV)
__________________
2014 Thor Axis 24.1
2018 Chevy Bolt
blog - https://spareelectrons.wordpress.com/
JamieGeek is offline   Reply With Quote
Old 02-25-2019, 01:28 PM   #5
Senior Member
 
Brand: Still Looking
State: Texas
Posts: 4,822
THOR #2121
Thanks for video, itís very informative. I did not know how Tesla batteries were configured.

Two of those Tesla modules in series would be just about the right size ó about 10 kWh at ~ 48 Volts. He mentioned already having a 24 Volt Inverter/Charger, but I canít see using 24V on a new system when 48V seems to be the future.

One of the advantages often mentioned about using Nissan Leaf battery modules is less sensitivity to cooling and heating. The video, however, mentions that at low power levels (likely encountered in RV use) that cooling shouldnít be required. Thatís really good to know. Keeping a battery from getting too cold is much easier than having to cool it down during high-power utilization.

Economics is still a big issue for me unless the RV just canít handle the extra weight of lead batteries, or you have to be able to recharge really fast. In his case the 5 kWh usable battery capacity could be accomplished with about 300 to 350 pounds of lead batteries if one is willing to replace them more often. And they are safe, simple, and easy to replace anywhere at any time.

There is a lot to consider. One problem is that if you custom build a unique system, how is that going to affect RV resale? Would the next owner want to rebalance battery every couple of weeks, or cover with a heated blanket like mentioned in video? And even if everything is automated, how would the next owner handle any malfunction?
__________________
Chance is offline   Reply With Quote
Old 02-25-2019, 04:35 PM   #6
Axis/Vegas Enthusiast
 
JamieGeek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 9,171
THOR #1150
Funny thing about battery heating and cooling. When I searched for that video the following video also popped up. Note that here they are using 5 battery modules and are using a fish-tank heater to keep them warm in the cold ! LOL
__________________
2014 Thor Axis 24.1
2018 Chevy Bolt
blog - https://spareelectrons.wordpress.com/
JamieGeek is offline   Reply With Quote
Old 02-25-2019, 10:38 PM   #7
Senior Member
 
Brand: Still Looking
State: Texas
Posts: 4,822
THOR #2121
Jamie, the Nissan Leaf air-cooled modules appear to me much easier to rearrange in whatever size battery bank you want. It seems many are going to 7 modules in series to make about 3.5 kWh capacity at 48V nominal (up to 55V fully charged).

You can buy these already assembled on eBay but expect you can build your own also.
Attached Thumbnails
Click image for larger version

Name:	2EED608D-9EB9-4052-BF6E-8FC2CBD98240.jpeg
Views:	43
Size:	32.2 KB
ID:	15845  
__________________
Chance is offline   Reply With Quote
Old 02-25-2019, 10:41 PM   #8
Senior Member
 
Brand: Still Looking
State: Texas
Posts: 4,822
THOR #2121
Or you can install multiple units in parallel for greater energy capacity. A problem I see is that connecting for 12V doesnít seem as practical as the 48V option.
Attached Thumbnails
Click image for larger version

Name:	47483E0A-6CA6-43FF-BB2A-3D40245E34BA.jpg
Views:	46
Size:	149.1 KB
ID:	15846  
__________________
Chance is offline   Reply With Quote
Old 02-25-2019, 11:37 PM   #9
Axis/Vegas Enthusiast
 
JamieGeek's Avatar
 
Brand: Thor Motor Coach
Model: Axis 24.1
State: Michigan
Posts: 9,171
THOR #1150
Interesting, not sure I'm at the point where I want to put EV batteries in the coach.

It is an intriguing option.
__________________

__________________
2014 Thor Axis 24.1
2018 Chevy Bolt
blog - https://spareelectrons.wordpress.com/
JamieGeek is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.




All times are GMT. The time now is 04:14 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2
×