Hi:
Please be careful when working with solar system size Lithium packs on the
cell level.
We have been doing on-going testing with Lion battery packs from various
suppliers and even with their built in temp sensors and other BMS
circuits, have already had two thermal events.
Lion is very
I was thinking of mounting the water heat elements into an aluminum
plate, laying the plate flat over a 55 gallon drum and filling the water
level up to the plate. Stratified water may make the top pretty hot but
I guess it will work.
Larry
On 3/17/15 1:07 PM, Ray Walters wrote:
Those look
I am repairing and restoring a pair of poorly designed lithium-ion
battery bank that suffered over discharge, damaging many cells. After
cell replacement I need to perform a discharge test with a 10kW load to
verify the remaining capacity. The battery voltage is 105 volts @ 100%
SoC and 89.6
Thanks, Matt for the details here.
I will be heading out to the site in the next little while and will report back
what was found.
Kevin
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org]On Behalf
Of Matt James
Sent: March 17, 2015 12:22 PM
To:
Load banks are for rent, I am in the generator business and it is a common
requirement to provide a load bank upon installation.
http://www.comrent.com/Solutions/load-bank-rentals.html
On Tue, Mar 17, 2015 at 4:35 PM, Ray Walters r...@solarray.com wrote:
Hi James;
So couldn't Larry weld in
Hi:
I cant put out anything which may show proprietary info, but here are a
couple close up fragments of images of failure trials where the BMS system
was not able to catch the issue before the event went out of bounds
thermal.
As you can see some kind of corrosive gas coated many surfaces
Hi Jarmo,
One of the reasons I chose to sell and install GBS batteries is the
chemistry is safer, they have vent caps (like AGM) and they offer an
integrated solution where the battery, EMS/BMS and CPU are all designed
specifically for each other instead of adding various parts from
Hi Larry,
I think you hit on the best load already: water heater elements rated
for 120 v. We have also used dump loads for wind turbines like the air
heating elements from Bergey, but they are only about 1 kW each.
Another possible source are the resistor banks for old golf carts
(before
I would rent a load bank, it will give you the versatility to change loads
as needed.
On Tue, Mar 17, 2015 at 2:41 PM, Larry la...@starlightsolar.com wrote:
I am repairing and restoring a pair of poorly designed lithium-ion battery
bank that suffered over discharge, damaging many cells. After
Hey Ray,
I remember seeing huge banks of light bulbs as loads back in the early
70's.
I need to test the entire bank as one unit as the first cell of 32 to
reach 2.8 volts determines the capacity for the bank. I just saw Home
Depot has a 2kW 120 volt water heater for $10. Guess I need to do
On 3/17/2015 3:07 PM, Ray Walters wrote:
Those look like your solution. Also water can take more heat with less
trouble than air heaters. I've had air heaters start melting things,
etc. You can just install those in the side of a 55 gal barrel with a
bulkhead fitting, or yes, weld the
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