PCB with integrated bus bars and balance wires from the PowerBlock battery.

[OverkillSolar]

In Will's latest video he pulled this board out of the PowerBlock battery that had all of the bus bars and balance wires integrated.

Good idea or no?



If I had this made for connecting my BMSs to the 280ah cells would you buy it? I can see pros and cons to this design.

Pro: neatly packaged battery assembly, easy connections to the balance wires.

Con: If the fiberglass board material compresses over time it could lead to loose/hot connections.

 

[AussieSim]

Most of my EVE 280Ah cells arrived (xuba + luyuan) undulating on the long sides and concave on the short sides.

As such parallel top balancing already puts tension on the terminal screws with slotted busbars, not so bad when the batteries are in series.

EVE LF280 arrived damaged.

My 4 cells arrived today from Xuba, the packaging was fine, but one of the cells has a dent near the top, about 8mm across and 1.5mm deep.(1st picture) What do people think about this in terms of long term functioning of the cell? Should I be adamant about a replacement? Also is it normal that...

diysolarforum.com

 

[OverkillSolar]

Wow that looks like crap.

 

[OverkillSolar]

Most of my EVE 280Ah cells arrived (xuba + luyuan) undulating on the long sides and concave on the short sides.

As such parallel top balancing already puts tension on the terminal screws with slotted busbars, not so bad when the batteries are in series.

EVE LF280 arrived damaged.

My 4 cells arrived today from Xuba, the packaging was fine, but one of the cells has a dent near the top, about 8mm across and 1.5mm deep.(1st picture) What do people think about this in terms of long term functioning of the cell? Should I be adamant about a replacement? Also is it normal that...

diysolarforum.com

View attachment 26515

I think I could do it with 2 hole patterns, wide and narrow.

 

[AussieSim]

Because the distances between poles is uneven, the cells will have a slight tilt, so the terminals wont all be completely level.

 

[bgflyguy]

Could you support 280a?

 

[BiduleOhm]

Main problem I see with this design is the current carrying capacity.

It all depends on the current you want to handle. If you want to support 1C then even with a 4 layers 2 oz PCB it'll not be good enough. It works well with traces lengths of a few mm but past that you'll get too much heat and voltage drop.

For lower currents like 100-150 A max it would work

Now the cost is another issue, it may or may not be competitive with classic copper busbars, you'd need to run the numbers to know.