Anyone buying these 305ah envision cells?

[Quattrohead]

Hell no, I used the cheapest one I could find on Amazon LOL

 

[#40Fan]

Hell no, I used the cheapest one I could find on Amazon LOL

Yep!

I'd use an old beam scale torque wrench before buying anything Snap-On for this job.

 

[Zwy]

Hell no, I used the cheapest one I could find on Amazon LOL

I knew you would like that.

I never used a torque meter or wrench on any of my cells, both in the camper and house. But I turn wrenches every day since I was 12 and after 45 years you can get a feel for it. I do own many Snap On torque wrenches and torque meters, they get used too when needed.

 

[Zwy]

Yep!

I'd use an old beam scale torque wrench before buying anything Snap-On for this job.

I'm not sure they make a beam scale for that small of torque. I use that 1/4" 30 inch lb torqmeter for setting up bearing preload on differentials.

 

[littleharbor2]

Talk about super fast shipping, ?? ?? 18650 Battery Store. Boo FedEx for leaving 1 box of 4 sit at the local warehouse.
Now to rig up some bus bars tomorrow to get all 16 together for a top balance. My 230ah bus bars are a bit to short...

All look excellent, I'm not concerned about swelling one bit.

Put my spare 230ah in the front, these 305s are a bit thicker.

I just built a 16 cell, 48 volt battery for a friend. Found out that each box of 4 cells comes with an envelope with 3 bus bars and 8 nuts. Problem is you need 15 bus bars to build a 48 volt bank. I have extra bus bars but what if you don't?

 

[42OhmsPA]

I just built a 16 cell, 48 volt battery for a friend. Found out that each box of 4 cells comes with an envelope with 3 bus bars and 8 nuts. Problem is you need 15 bus bars to build a 48 volt bank. I have extra bus bars but what if you don't?

Mine came with enough to make a 16s pack...

 

[#40Fan]

I'm not sure they make a beam scale for that small of torque. I use that 1/4" 30 inch lb torqmeter for setting up bearing preload on differentials.

That is exactly what I use mine for. Going to guess it goes up to 90 in. lbs. and is an older Craftsman.

 

[a619]

I just use a cheap bike torque driver I have for these small torque. I'm fairly certain it is not very accurate, but does the job.

 

[a619]

I just built a 16 cell, 48 volt battery for a friend. Found out that each box of 4 cells comes with an envelope with 3 bus bars and 8 nuts. Problem is you need 15 bus bars to build a 48 volt bank. I have extra bus bars but what if you don't?

My order from 18650 came with 1 busbar per cell.. Maybe ask them to send you the missing ones.

 

[Quattrohead]

!ucking hell,
Finally got the second BMS and built out my second EEL box........and snapped off 2 more cell studs.
Way below 6nm, you can just tell they are going.
PISSED OFF.

 

[42OhmsPA]

!ucking hell,
Finally got the second BMS and built out my second EEL box........and snapped off 2 more cell studs.
Way below 6nm, you can just tell they are going.
PISSED OFF.

I snugged mine up last night with a stubby 1/4" ratchet, I have to tighten the remaining 6 with a combination wrench since I didn't account for the terminals being under the supports on my rack.... (error code dumbass on my part)
One of them gave me a bad feeling with the ratchet but it snugged up fine.
I'll probably break 2 or 3 tonight...

 

[Brucey]

!ucking hell,
Finally got the second BMS and built out my second EEL box........and snapped off 2 more cell studs.
Way below 6nm, you can just tell they are going.
PISSED OFF.

I thought I read somewhere that 6nm was too much for aluminium terminals?

 

[42OhmsPA]

Everything except the main positive is tight. The 1/4" torque wrench stayed in the drawer the entire time with its bigger brothers or sisters.
I used the 1/4 stubby ratchet and stubby combination 10mm pictured, went back over everything with the wrench and gave it a final snug. I can see it now, breaking the main + when I finalize the wiring...

I also finished up my take on 'compression', I might modify it once I think of a better idea.
Edit - glad I looked at the photos, need to snug up 8 more screws.

 

[Quattrohead]

I called around a few places locally to see if anyone would try to weld the studs back, none would touch them.
I looked into aluminium welders on our favorite shopping site but I have not a clue to be honest and they seem to be $400 plus for a decent unit plus goggles etc.
So, I am going to try the MG Chemicals 8331D Silver Conductive Epoxy Adhesive and an M6 helicoil set.
Scrap the 8331D, bought a drill press instead. I could use one anyway.

 

[Surferdudemi]

I called around a few places locally to see if anyone would try to weld the studs back, none would touch them.
I looked into aluminium welders on our favorite shopping site but I have not a clue to be honest and they seem to be $400 plus for a decent unit plus goggles etc.
So, I am going to try the MG Chemicals 8331D Silver Conductive Epoxy Adhesive and an M6 helicoil set.
Scrap the 8331D, bought a drill press instead. I could use one anyway.

Is there a makerspace in your area that has welders? Ours has MIG, TIG, torch, and plasma cutter. Might be able to do it there or ask them to help you

 

[tjstepanian]

UPDATE
ordered 17 - 304aH grade B cells on Wednesday 11 Oct., received shipping order 3 hours later. Batteries not picked up by UPS upon checking this morning, Called James to check status, was told they were out of stock and received refund shortly after.
I was offered a deal on NEW 304 cells at $125 dollars each x 16 + shipping. I accepted the offer and purchased a JK BMS as well, everything shipped to the door for $2400.00. I hope these make it off the shipping dock. Will keep you posted.

UPDATE Wednesday 18 Oct.
Brand new cells arrived, appear to be in great condition, no swelling, all busbars accounted for as well as screws/nuts. I posted pics. Now for the Individual capacity test. More to come

 

[42OhmsPA]

UPDATE Wednesday 18 Oct.
Brand new cells arrived, appear to be in great condition, no swelling, all busbars accounted for as well as screws/nuts. I posted pics. Now for the Individual capacity test. More to come

Aren't those 280ah?
I'd strongly advise putting a 3/4"-1" hardwood board or some other substrate between the shelves and the cells... They will bow when loaded.

 

[houseofancients]

UPDATE Wednesday 18 Oct.
Brand new cells arrived, appear to be in great condition, no swelling, all busbars accounted for as well as screws/nuts. I posted pics. Now for the Individual capacity test. More to come

These are NOT envision cells

 

[tjstepanian]

Aren't those 280ah?
I'd strongly advise putting a 3/4"-1" hardwood board or some other substrate between the shelves and the cells... They will bow when loaded.

These are the EVE 304 Ah cells or at least that is what I'm purchasing, will let you know for sure after capacity test. I just cut some ply to place under the cells, thank you ! Also I will NOT be torquing the cells to 6 Nm but will go with 4 Nm torque

 

[tjstepanian]

These are NOT envision cells

Correct...they sold me the envisions but canceled due to lack of inventory. So, I bought the EVE 304 Ah cells at a great price...I hope