Uploading video of a battle born tear down. get ready guys :D
Opened up a ruixu battery. Not impressed...
- Thread starter Will Prowse
- Start date
MrNatural22
?SW sunshine =⚡️⚡️lit up thru the darkness✌️
However, in both cases, the BMS is contained in a thermally insulating box with no heat management at all that I can see. A single thin fiberglass plate between the two in the first instance is no better (thermally) in my opinion than the later one. It does provide mechanical separation which is a plus, but may not really be necessary. That green battery Will took apart shows how it should be done, with the BMS actually in a separate compartment.
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Fair points indeed. That seems to be the American way these days. Same is true for home builders and developments. They setup an LLC to build a new neighborhood, use shoddy techniques and materials, but promise long warranties. Then as soon as they are done, they dissolve the LLC. I had a friend that just went through this when he tried to chase down the builder for warranty on a new home that developed severe roof leaks and ended up with major damage. makes me so 8-(
Woohoo!!!
Knowing how long it takes for my dinky little videos to upload and process, it must take hours for one of yours!
Its up!!
MrNatural22
?SW sunshine =⚡️⚡️lit up thru the darkness✌️
LiFePo in clear cases ? What a great idea Will ??
No more hidden dissappointments? Just found this.
No more hidden dissappointments? Just found this.
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Rider
Solar Addict
Great review, Will. Good news!
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
Great Review again Will. The price of BB reflects what you are paying for doesn't it. 21650 format is an odd one I don't know how many manufacturers make that size, can't be too many. The BB BMS is likely a proprietary unit as well so I would not bet on finding much about them either I think.
If you keep doing tear downs, seriously consider a playlist for these video's specifically to make it easier for folks to compare and see side x side.
If you keep doing tear downs, seriously consider a playlist for these video's specifically to make it easier for folks to compare and see side x side.
That's a good looking battery!
I would like to see the BMS in a separate compartment. Are there air vents or anything in the top of the case?
Maybe it doesn't matter..
It is 26650 actually, which is a common size. You must have heard him wrong..
Bob142
Build more, learn more.
We need a new thread for this! Battle Born success is hiding under Ruixu's shame...
SolarRat
Solar Addict
Looks like a well built battery...but it better be for nearly a grand!
Wow, copying the BB design could be trivial:
www.alibaba.com
$278 for the batteries.. Would need a spot welder though... and a 3D printer for the battery trays.
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Cb Approved Rechargeable Lithium Ion Battery Pack 26650 3.2v 3.3ah 3.2v 3300mah Li Battery For Head Lamp - Buy Rechargeable Lithium Ion Battery Pack,26650 3.2v 3.3ah,3300mah Li Battery Product on Alibaba.com
SolarRat
Solar Addict
Very easy to DIY them! I like the one that uses a car starter solenoid.
MrNatural22
?SW sunshine =⚡️⚡️lit up thru the darkness✌️
Almost the same battery used in my 8 cell motorcycle 12v battery. These are 26650. Ruined by using the wrong charger ?
3.2v 2500mAh
MrNatural22
?SW sunshine =⚡️⚡️lit up thru the darkness✌️
Ok, I had to see if I got the shoddy Ruixu 100ah so I could sleep. Bought it a couple months ago and it’s been driving me loco wondering.
So psychotically throwing the warranty
aside but forging ahead........?
Yep they sent me the newer cheap build version. ?
Looks like Ruixu can not be trusted!!
Going to take some big time TLC for a long time to gain any trust back?
Ruixu? Are you listening????
Well at least I got good cells but the crappy BMS. I might put it back together with a good BMS in a clear case like Will mentioned that way I could see inside that
$700 box O
So psychotically throwing the warranty
aside but forging ahead........?
Yep they sent me the newer cheap build version. ?
Looks like Ruixu can not be trusted!!
Going to take some big time TLC for a long time to gain any trust back?
Ruixu? Are you listening????
Well at least I got good cells but the crappy BMS. I might put it back together with a good BMS in a clear case like Will mentioned that way I could see inside that
$700 box O
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Freaking China man. What a bummer.
MrNatural22
?SW sunshine =⚡️⚡️lit up thru the darkness✌️
LOL
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
@MrNatural22 it at last appears that an adult with experience soldered things on yours from what I could gleen, compared to that mess Will opened up. GEEZ, my new pack arrives tomorrow (per UPS tracking) and while it's a Shunbin, these "explorations" and Delta-V's forensic dig into his, I must say I'm feeling somewhat edgy having dropped $4K CAD on it.
MrNatural22
?SW sunshine =⚡️⚡️lit up thru the darkness✌️
Here’s a shot of the solder joint out of the 5 BMS wiring to the neg case terminal. Looks ok ?
Four 14g wires in.
Five 16g wire out of BMS.
Logical thinking says for a 100ah LiFePo battery the BMS wiring should be at least 10g even 12g for high safe current use.
gnubie
Solar Wizard
- Joined
- Sep 20, 2019
- Messages
- 3,844
I does look like they got it up to temperature but my concern with it is that there doesn't seem to be any mechanical support there. Electrical solder is there for conductivity, not mechanical support. If enough current flows to heat things up to the point where the solder becomes plastic odds on the wires are going to move due to tension in the cable (bends etc). The joint might start to split increasing resistance, more heat etc or it might outright pop open.Consider where that joint is sitting next. It's probably right in contact with the cells. It's not really a good thing to have a high resistance joint (from splitting etc) getting nice and toasty where it could melt through its own insulation and the thin plastic sheet on the cell and make contact with the metal shell of the cell.
A lot of this is worst case scenario but we are talking about thing that can store over 1kWh of energy so we really don't want uncontrolled current flows.
All up not disastrous, but not really the sort of thing I'd want to see in a battery.
A lot of this is worst case scenario but we are talking about thing that can store over 1kWh of energy so we really don't want uncontrolled current flows.
All up not disastrous, but not really the sort of thing I'd want to see in a battery.
Steve_S
Offgrid Cabineer, N.E. Ontario, Canada
Ohhhh Ughhhhh thanks for those pics. < me happy I didn't get a Riuxu >
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