Maybe the BMS was never tested by Relion for all of the possible failure
modes? Maybe it was tested and it got thru QC.
I know very little about
this company. Do they meet the standards like,
manufacturing facilities
are fully certified to ISO 9001/14001 and OSHA 18001 standards.
Meets UL
9540
CERTIFICATION STANDARDS
* IEC 62133
* UL 1973
* UL 2271
*
CE
* UN 38.3
Not trying to be a pain either Jay. You know the LFP I use!
Good Luck!
Dave Angelini Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [1]
e-mail [email protected]
[2]
text 209 813 0060
On Thu, 17 Jun 2021 11:55:35 -0600, jay wrote: HI
All, The cover never got all the way off before it was blown off, it was
just started to be opened, so no way there was an external ignition source.
If it was an explosion it was all from internal components except for
possibly some O2 coming from the outside. My other question still hasn't
been answered. If the BMS isn't taking care of over/under voltage and over
current what is it doing to prevent damage to the battery? ( this system
was within the input PV or output inverter watts/amps of the battery
specifications) And I just found out that on the day of failure, no one has
been living there for months and only a grundfos SQFlex and a few lights
were on, no big loads. Now maybe I've been under the false understanding
that this is the primary job of the BMS? Yes I know that there is also
cell balancing, % monitoring, blue tooth, wifi etc that can be included in
the BMS but to me thats all secondary. Hopefully someone can clear this
up for me. jay
On Jun 17, 2021, at 9:01 AM, Steve Higgins
wrote:
I have to agree... the gasses that come out of these cells can
still be flammable... My guess is the settings were too high, or a cell or
two were already in thermal runaway, causing internal gassing. When the
cover was pulled off that gas found an Ignition source and ignited.
Inverter and charge controllers all have relays in them and every time
they switch you can ignite flammable gasses if the concentration is enough.
This is why it's always very important to make sure the room that any
battery is installed in is properly ventilated, especially when you are
working in said room.
[4] Steve Higgins ⋅ Technical Services Manager
t +1.902.597.4020 m +1.206.790.5840 f +1.902.597.8447 e [email protected]
[5] [6] [7] [8] [9] [10]
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On Thu,
Jun 17, 2021 at 7:01 AM Dave Angelini Offgrid Solar wrote:
My .02 on
this, and just a guess, the open loop charging parameters were not set
right or charge limits for the battery were too high. The other way to kill
LFP is large loads exceeding the battery max discharge current.
Closing
the loop eliminates just about all of those issues. It brings the battery
into the safety area of LA batteries that are still hard to beat offgrid. I
am not saying you can't blow the top off a LA battery either
Dave
Angelini Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [12]
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[email protected] [13]
text 209 813 0060
On Thu, 17 Jun 2021 07:23:07
-0400, John Blittersdorf wrote: This just proves the weak link is the
BMS. I had the honor of replacing the BMS in that exact model in a stack of
3 batteries. Luckily it was on the bottom shelf so I could pull the monster
out onto the floor to get access to the lid. The lid is sealed shut but
with persistence it opened. I was working with their tech support and
following their instructions. I disconnected it from the other two that
were in a parallel configuration before opening. Battery voltage was zero
at the terminals. I did voltage checks at various checkpoints to confirm it
was the BMS at fault. Relion sent a new BMS which I carefully installed and
it has worked fine since. Had I seen this photo first, I may have not been
so eager to see the inside of that battery. John Blittersdorf
On Wed,
Jun 16, 2021 at 6:13 PM Chris Worcester wrote:
https://www.redwoodmaterials.com/recyclewithus [16] these folks are
seriously getting into recycling lithium batteries, setting up house out by
the Tesla giga factory out east of Reno. Chris Worcester
[email protected] [17] 530-448-9692 Sent from my Samsung Galaxy
s9. -------- Original message -------- From: jay Date: 6/16/21
12:49 PM (GMT-08:00) To: Jeff Clearwater , Jeff Clearwater , RE-wrenches
Subject: Re: [RE-wrenches] Exploding LFP battery Hi Jeff, I don't know
if you saw the photo. No cutting involved. The top is removed with roughly
14 fasteners. No tools or prying was involved in the removal of the top
cover. jay
On Jun 16, 2021, at 12:00 AM, Jeff Clearwater wrote:
Hey Jay,
So I don't believe ReLion batteries are openable - so it's most
likely that when he decided to open it he cut into it and shorted the
leads.
As for recycling - first is health safety! I'd suggest he contact
the manufacturer and get specific instructions for safing the mess. Will
Prowess of DIY Solar Youtube channel had some leaky cells and the
manufacturer sent specific instructions to contain and ship back the unit.
You could contact him and he might know but the manufacturer might know
better for that specific model.
Hope that helps!
Jeff C.
Village Power
Design
frenergy [23] June 15, 2021 at 9:39 PM
Very few
details...What does it mean "he opened it up" I would even know how to do
that with the L-ions I've been around, seems like its something a
manufacturer should be doing. Temperature? charge rate? recent usage
history? Age? Was it disconnected? Did contacts touch a conductor?........
You can probably get water to explode if you abuse it just right.
Bill Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
[24]
Taylorsville, CA 95983 [25]
530.284.7849
CA Lic
874049
www.frenergy.net [26] On 6/15/2021 8:14 PM, Jay wrote: --
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List rules "> Jay [36] June 15, 2021 at 8:14 PM A fellow
installer sent me this just now.
The battery wasn't working, 5v.
He
opened it up and it exploded when he opened it. The lid hit the roof.
Fortunately no one was injured.
Anyone know what to do with this? IE
recycling?
And just another example of non explosive lithium batteries
exploding
Jay
Peltz power.
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