Lipo Smart Batteries and DIY Powerwall

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wytco0

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Hi All, I am just starting to look at DIY powerwalls, has anyonebuilt anything using different batteries to the 18650 ?

In particular anything like the so called smart batteries such asCharsoon BattGo 14.8V 1500mah 80C 4S Smart Lipo Battery

These batteries seem to have some built in reporting capability and also handle balancing, however I have no idea if they could be used in a DIY Powerwall
 
Thats just normal Pouch cells for RC. You can of course build with them but there is nothing smart about them. You still need bms/balancer and they are 100x more fragile and cause more issues than any 18650 cells.

The "smart" function is optional and thats with external unit...
 
daromer said:
Thats just normal Pouch cells for RC. You can of course build with them but there is nothing smart about them. You still need bms/balancer and they are 100x more fragile and cause more issues than any 18650 cells.

The "smart" function is optional and thats with external unit...
Click to expand...

OK Thanks for the info.

Basically I don't think I have the time or skill to obtain and prepare a large number of 18650s so I am hoping to find a different type of cell that I can use hopefully something that is fairly cheap and can be built up over time.

Has anyone built a DIY powerwall with anything else?

Thanks for your greatvideos, I have been watching them all.
 
Look for LiFepo4 bricks instead. Then you dont have to spend time with 18650 cells. Or go for Valence or other 12V packs that are prebuilt.
 
Sure, they can be used, but it would be stupendously expensive using pre-built RC LiPo batteries for a powerwall.

I recently discovered the BattGo standard myself and saw that amongst ISDT (which seems to be the company producing all the hardware at the moment) and Banggood there is also SLS involved. SLS is StefansLipoShop, a german shop for high quality RC LiPos, and I got in touch with them, asking about this BattGo standard. There isn't that much to tell yet, this is still very new and early.
At the moment I think this could stay a closed standard, strictly for companies to make their products, and with no benefit to the DIY community. However, this wasn't confirmed nor denied because it is too early to tell. I'll keep an eye on it, but I have my doubts.

Also, they don't handle balancing themselves as such. They still need to be balanced externally, the same as it is now.
 
I've seen some people use 3 cell (6V) LiFePo4 bricks but they've quite expensive for bricks with decent mAh rating. I think they got them from a forklift or something like that.

The core reason we use 18650's is because they are arguably the most common cell out there. Laptop's have been using 18650 cells for years and years so the shear volume of used cells is high.
 
They are 3.2V nominal = 9.6V as DarkRaven said if you go 3s. 1 cell of LiFe is always 3.2-3.3V nominal.
 
wytco0 said:
Hi All, I am just starting to look at DIY powerwalls, has anyonebuilt anything using different batteries to the 18650 ?

In particular anything like the so called smart batteries such asCharsoon BattGo 14.8V 1500mah 80C 4S Smart Lipo Battery

These batteries seem to have some built in reporting capability and also handle balancing, however I have no idea if they could be used in a DIY Powerwall
Click to expand...

I have incorporated BattGO into one of my 6S Power Wall batteries. When you connect the battery to a BattGo compatible charger or voltage checker, you will be able to access a lot of crucial information about that battery pack, including:

Battery Brand
Date of Manufacture
Battery type and capacity
Battery C Rating
Cell voltage
Remaining capacity
Temperature
Discharge cycle
Error log about overheat, over-discharging and overcharging

as well balancing the cells.



 
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