good 48v 16s active balancer?

[marionw]

https://a.co/d/5YOB7H8 Might work?

Actually tried these and they slide up and down the wire. Did use them on the balance lead harnesses I had to replace when installing the new JBD BMS in my ECO-Worthy battery

 

[Skypower]

For size comparison for active balancer(and bms w/active balancer). The EnerKey 4 amp is on top of a 4amp Neey. EnerKey is 3/16” thinner and comes leads that are 1” longer with numbered eyelets. That harness length should be long enough to feed a battery from one end, two rows of eight side by side without a stretch and neatly. Impressed so far.
The Heltec needs the controller for voltage start control. It requires more wiring and the way I like installing, I have to extend the balance leads. I’m doing comparison between the Heltec and EnerKey over the next few weeks. The Heltec setup has been ran and the EnerKey is up next. I’ve got a battery that probably has grade B cells and gets out of whack more than the others. It doesn’t help the it might be weeks before it gets to balance voltage and once it does get there the absorb time is a bit short (15-30 minutes) which I have no control over. Terminals are clean and tried two different JKs so know it’s the cells, a perfect test victim. The plan for this test is to set the balance trigger voltage on the JK to 20mv so the two are not counterproductive and fighting the EnerKey. So basically I’m hoping that it’ll have up to 6 amp balance on the problematic cells when the delta is worse than 20 mv and 4 amps below. I’ll be watching the apps closely on two different phones to make changes as needed to fine tune it. I’ll also test the EnerKey on its own. Likely start balance voltage 3.43 and absorb 55.2 volts.

 

[Skypower]

Just placed another EnerKey order. If it works as well as the Neey has, between both kinds, I’ll have enough to augment additional balancing power for all the batteries into the future.

 

[Skypower]

Another thing I noticed about the EnerKey is that it’s powering wires, both negative and positive are separate from the balance/sense leads. Great idea.

 

[Pierre]

For size comparison for active balancer(and bms w/active balancer). The EnerKey 4 amp is on top of a 4amp Neey. EnerKey is 3/16” thinner and comes leads that are 1” longer with numbered eyelets. That harness length should be long enough to feed a battery from one end, two rows of eight side by side without a stretch and neatly. Impressed so far.
The Heltec needs the controller for voltage start control. It requires more wiring and the way I like installing, I have to extend the balance leads. I’m doing comparison between the Heltec and EnerKey over the next few weeks. The Heltec setup has been ran and the EnerKey is up next. I’ve got a battery that probably has grade B cells and gets out of whack more than the others. It doesn’t help the it might be weeks before it gets to balance voltage and once it does get there the absorb time is a bit short (15-30 minutes) which I have no control over. Terminals are clean and tried two different JKs so know it’s the cells, a perfect test victim. The plan for this test is to set the balance trigger voltage on the JK to 20mv so the two are not counterproductive and fighting the EnerKey. So basically I’m hoping that it’ll have up to 6 amp balance on the problematic cells when the delta is worse than 20 mv and 4 amps below. I’ll be watching the apps closely on two different phones to make changes as needed to fine tune it. I’ll also test the EnerKey on its own. Likely start balance voltage 3.43 and absorb 55.2 volts. View attachment 275505View attachment 275506

I went the Heltec way ( without controller ) on my earlier JBD 16s . Permanently connected - cells are happy @ 3mV Vdelta when full.

 

[AshleyL]

I went the Heltec way ( without controller ) on my earlier JBD 16s . Permanently connected - cells are happy @ 3mV Vdelta when full.

Ah, the A30-U1 relay voltage controller.
I have 3 of A30 in conjunction with Heltec/Enerkey 5A for my Sinopoly and EVE cells.
Work well in keeping the top balance. The voltage correction of A30 is very useful too.

Charged to 56V (trigger voltage is 55.2v) for my 16 cells and stop balance at 55V.
Absorption time around 10 - 15 minutes as per Growatt inverter USE mode algorithm which I cannot set nor control, hence the higher charge voltage.

Cell delta for Sinopoly are 10mv and 15mv (ancient cells with "slightly" higher internal resistance in conjunction with older JK 2A BMS, I don't use the JK 2A active balancer function, it creates voltage spike on my Sinopoly cells which causes Cell Overvoltage disconnect)

Cell delta for EVE is 3mv. Never see the delta lower than 3mv, might be the limit of Heltec/Enerkey 5A capacitive based active balancer?

 

[Skypower]

Av

I went the Heltec way ( without controller ) on my earlier JBD 16s . Permanently connected - cells are happy @ 3mV Vdelta when full.

A lot o people can’t get away without controller, but I believe that it’s because of the individual’s use patterns. What ever works.

 

[Skypower]

Cell delta for Sinopoly are 10mv and 15mv (ancient cells with "slightly" higher internal resistance in conjunction with older JK 2A BMS, I don't use the JK 2A active balancer function, it creates voltage spike on my Sinopoly cells which causes Cell Overvoltage disconnect)

That’s weird, but I’ll file that away for the future.