Exactly as @Larsb said.
Higher voltage with 14S to reduce current at same power.
8 cells in parallel was the compromise between weight/space/costs/assumed foiling time.
Okay I see, so 12s10p can give me a little bit longer of a run time at the cost of a warmer running pack and a slower top speed?
Hey what kind of bms do you use vor the battery?
Yes, well, it will not run hotter per cell but as there are more cells though you will get slightly more total heat to get rid of. I donât think itâs an issue to worry about with this size of battery - I have never seen my battery hot even when the controller was steaming.
No BMS @ the battery, no possibility of additional failures.
While charging with ISDT K4 Smart Duo Charger the packs get balanced.
Wonderful attention to detail!!!
I am using some of the same components in a build I am starting, the 75200 VESC and the motor.
Iâm curious why you chose to implement your own water cooled heat sink rather than use the FLIPSKY 75200 water cooled version (this is the one I have chosen)?
The water cooled version was sold out when I orderedâŚ
Thanks - that would explain it. I thought perhaps you didnât like the design that FLIPSKY used.
The whole concept of striving to create waterproof compartments and then intentionally pumping water into them is sort of funny!
Some details of the battery.
I spent some time and test to find a (for my pack) best solution for the busbars:
- soldering should have been limited to smaller wire dimensions
- no soldering at the batteries
- direkt connection to the Amphenos Surlock terminal
The result:
Each 2 parallel cells get a 6mm^2 wire soldered to a doubled piece of 0.15mm (2x = 0.30mm) Ni strip
With 8P there are 4x 6mm^2 = 24mm^2 that perfectly fit inside a 25mm^2 crimp connector.
Build completed
Dry testrun:
Today snow again after sunny day yesterday, no further testing outside
Would it be possible that you send some pictures of how you connected the balancer Cable to the cells ?
You´ll see it above:
And here:
Nickel strips left one tab a little bit longer (under the blue shrinktube) for the balancer connector.
(in CAD picture from battery pack not drawn)
Hi Marcus, how did you secure the boxes for the batteries? I am using similar boxes for my batteries. I also see you have a 4th grey wire going into one of the boxes, what is this wire for?
The grey wire is for antispark. Itâs battery plus connected to VESC plus with a resistor to limit current for uncharged VESC capacitors.
The battery boxes are secured with hook tape and additional withe a 3D printed part that ist glued at the hatch cover.
Today maidenflight @ sunshine and 5°C watertemperature
Most time for first ride on knees, 20% standing.
Was not easy, board is very âzappeligâ in german.
Will try some other setups
What app is that you are using for logging?
By the 32 N Have you put anything between your 3d Print and the fluid? So the 32 N doesnât stick to ist?
Directly poured in the 3D mold without any release agent. The Wagnersil silicone is sticking to nothing (maybe only to itself?)
After short time of reaction time (~20 minutes) very easy to peel out of the form without any sticking.
Itâs also possible to mold with undercuts because of the soft Wagnersil.
I love this blue fluid