Another Lithium option to consider: 23-24kwh THINK Enerdel battery pack (New In Box)
The price on the remaining packs has dropped substantially.
See below Cross Posting note from Jim Houser's post to the think_ev and Lithium-Ion groups (apologies for this spam, but it is a good deal).
As noted, there's about 50 of these packs remaining (I just bought another one to split between my boat and a friend's boat).
These are available for $5k and include:
· 8 THINK Battery Modules (each containing 2 Enerdel modules and 2 RLEC (Remote Lithium BMS control boards))
o 23-24kwh total energy capacity: Each of the 8 THINK modules rated for nom. 3kwh
o Reconfigurable as either 96v (default for THINK) or 48v (how my boat uses them)
o Essentially each of the 2 Enerdel modules inside each THINK module are like this:
http://elithion.com/pdf/enerdel/MP310-049.pdf
More info here: http://liionbms.com/cgi-bin/moin.py/CustomProducts/EDI/EnerdelBattery
· 2 Current sensors
· 4 (or 6?) relays including 1 or 2 kilovac ones
· Silver-plated slip-fit connectors with ultra-flex cables
· More stuff…
Cost < $210/kwh (including RLEC BMS boards and lots of other hardware as noted above)
The packs are configured for THINK EV cars and may or may not include the Master Lithium Energy Controller circuit board.
My boat has been powered by these THINK modules now for the past 18-months or so.
I wired them in parallel for a battery bank that ranges between 32v and 49v (100%SOC).
Catch: You'll likely have to pay significant shipping cost from INDIANA. Also, neither Enerdel nor THINK USA (bankrupt) will provide interface or other information on the RLEC BMS boards. However, the communication protocol is somewhat detailed and as mentioned below, I have had no problem communicating with the boards via 500kbps CAN.
My boat's status: I have 8 of these battery modules wired in so far (560ah @ 40+v nom) and will ultimately have 10-12 of them. For charging I still don't have an automatic charger setup and I haven't enabled any of the BMS controls yet. I have recently developed SW for Arduino and CAN Shield that successfully communicates with the battery modules and reads all the cell voltages, temperatures and any fault codes. So far I haven't successfully set the lower & upper BMS thresholds but they are supposed to default to 4.1v/cell as long as 12v is applied to the board.
I get nothing out of posting this---just putting it out there as an option for folks.
Please don't email me with lots of questions---but I will help anyone with serious interest.
I'd post pics of these on my boat, but the pics wouldn't be that pretty---OTOH, maybe Capt. Mike has put some up on his blog?
Anyway, there you have it…
-Myles
My company, Hawthorne Auto Clinic, is the warranty service center for TH!NK City EV's in the Pacific Northwest. THINK Electric Vehicles | Think Electric Vehicles – USA | 100% Green. 100% Unique. In the US these cars are powered by an EnerDel 400 VDC, 23,0 kWh/ 70Ah, Li-Ion battery pack. TH!NK is trying to sell @ 50 of these battery packs. The packs are being stored/maintained at EnerDel in Indianapolis, IN. If anyone wants more info on the packs, or on the particulars of the sale, please let me know. Jim Houser, www.hawthorneauto.com, jim@hawthroneauto.com, 503-234-2119.
| |||||||
|
| | | | | | |
THINK Electric Vehicles | Think Electric Vehicles – USA ... The THINK City is a modern urban car—fun to drive, easy to maneuver and park, and economical to operate with zero tailpipe emissions. | |||||||
Preview by Yahoo | |||||||
| |||||||
From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
Sent: Friday, May 08, 2015 12:14 PM
To: electricboats@yahoogroups.com
Subject: Re: [Electric Boats] Re: Powerwall from Tesla, residential battery pack at $0.35/wh
OK OK, I looked at the power wall...its a beautiful white fiberglass fluid dynamic shape, so yes all us sailboat guys love it on site, can just imagine it hanging on the stern of our 30 footer looking "tres kewl" (well maybe thats a little close to the salt water)
I agree if the thing has 400 v DC, use it! lots of industrial big DC motors out there that run on 400 DC, you can buy them cheap, or 3 phase AC.
just be careful if you are swamping, you'll have another danger to seriously consider along with all the other things going on in that emergency.
the thing i don't get is how(or why) it takes 220 volt current and charges the battery at 400V? must be stepped up and rectified at a loss, then to use it, it goes through a step down and inverter at another loss...and then theres also the loss of charging a battery....I wonder how many KWH's you put in to get one KWH back...how efficient is this electro econmically?
If I had a bigger boat and docked with shore power, and had the dough to build an awesome system ....yeah...I'd go with the Musk Machine and a 20 hp dc.the 10yr garantee and maintainance contract thing may not apply to salt water environments
Posted by: "Myles Twete" <matwete@comcast.net>
| Reply via web post | • | Reply to sender | • | Reply to group | • | Start a New Topic | • | Messages in this topic (14) |
No comments:
Post a Comment