Recent content by pbert

I have a 4p14s pack that i would like to increase the capacity by adding another parallel group to it. The cells are all of the same manufacturer and model. The existing pack is fairly new only a couple months of use. If i make sure that the voltage of the cells on the assembled pack and the...

So i am guessing that the emmebrusa fork is not compatible with the caisanho version of the OSF. I have to flash both the motor and display with same versions ? Does anyone have images of what the display looks like with the mbrusa version ...

Do you have a link to the mrbusa forked firmaware and also any instructions on how to install it ? Is it the same as installing OSF instructions from eco-ebike.com ? Thanks.

Yes it is a new 2021 version. Does this also apply to the 860C ? And now that my screen wont turn on is it too late to do anything ? It is bricked you think ? Or is there a way to install the forked firmware ? Thanks.

I think I have bricked my 850c screen after attempting to flash the opensource firmware. I have a new motor with the 6 pin output from the motor for the screen. I have another motor which has the 8 pin with the harness that connects to an 850c screen with a 5 pin and i have updated the...

So just reporting back after having tested and ridden the pack. Plugged it into an Electric Motion and went for a ride up and down a ski hill about 9 times. The amps, voltage drops and temperatures were monitored on the bluetooth bms. The pack hit the 120A continuous value a few times and the...

Cool! Do you guys think this battery will hold up for 120 Amp pull ? Or you see any issues with it possibly burning to the ground ? It's going into an Electric Motion trials bike. Either way, for the first ride im going to ride it incrementally with more power. I have a smart BMS with...

Who was LFP ?

thanks! i would have prefered 25R for sure but got a good deal on these used 20R cells ... that is the sad truth :) the cells were already individual, i didnt have to grind the old connections off. If i would buy new cells to make this i would have chosen Samsung 40T, 10P14S would give 40Ah and...

Here is the result. This is going to have a BMS that can allow up to 120 Amps... anyone see any issues with the pack ? Copper sandwhich of 0.15 copper and 0.15 nickel. Used 4 AWG copper buss for the cells that had many cells distance from the next cell in order to support high current. The...

Hi, Im building a 14s12p pack that will be folded in half, basically built out of 2 block and connected at mid point. I've attached a pic of the best battery layout that i could think of. I tried to keep the series connections short. The pack will fold in the middle. Let me know if anyone...

Ok so the copper finally arrived and it was worth the wait. I was able to successfully sandwhich the copper to the cell. Here are the details : copper = 0.15mm nickel = 0.2mm spot welder = malectrics spot welder setting = 26 ms pulse The welds are solid and i fell better havin the 0.15mm...

Ok thanks for the details about using the 01.mm. I'm reading through the posts that you linked and it does look like devmonkey was doing the same thing i am doing :) deja vu indeed. I'll read through those posts and see what the outcome was. Thanks for this.

I just tried the above, nickel plated steel with the 01.mm copper, and it works pretty well. You think that 0.1mm copper is enough for 30A ? I was looking at the ampacity chart i had found on a thread in this forum from Matador and it says that a 10mm by 0.1mm copper is good for 15 amps...

Sure i'd be happy to do a test with 0.15mm copper. Ive ordered my copper from ali express so will take a month before i can get it and post results though. No worries for payapl, thanks for offer but i'm happy to contribute.