Recent content by bengee

I've searched for a replacement BMS, and I'm yet to find one small enough (<50mm width) to fit in the dedicated slot. The current faulty BMS is 47mm in width. The battery has a max current rating of ~47A, so I've been looking for a 60A device. Or would a 45A rated BMS be suitable? I've looked...

Thank you for this! I think I better start looking for a new BMS, preferably one that's configurable.

The readings are inconsistent for cells 13 (+1%) and 14 (+5%). They have identical readings for the remaining 12 cells.

The Active Balancer didn’t do any balancing, as all the cells were within 50mV of each other. I believe it is working, but to be sure I need to push the cells out of balance. Not sure I have the equipment to drain a single cell group. Perhaps I could charge a single cell group instead, as I do...

Thanks for sharing this trick. What do you use to discharge a single cell group at ~4v? I suspect that in the next day or two I'll want to manually draw from the misbehaving cell group and see how this affects the BMS readings. Thanks for confirming wiring and correcting the cell numbering...

Time to try the Active Balancer. Since I'm new to all of this, I've "drawn" a diagram to indicate where I plan to solder each of the 15 wires and married it up to a photo of my battery. Can anyone confirm if this is correct or not? Other developments since my last post: 1. I have...

Oops! :oops: Thank you for putting me straight fechter. I've since built a new version, this time in series, and managed to get the battery down to 60% (according to the BMSapp). In an attempt to get the BMS to balance the cells (balancing kicks in at 50%), I plugged in the charger on the Low...

I have just soldered this contraption. When I turned battery on there was a pop and faint burning smell coming from battery. There are 5 100w 12v halogens in parallel, so should be at 60v? When connected the battery, the battery displays “over current protection”. The battery still powers...

I have lightbulbs for 220-240v applications. Will the voltage not be too high for the 52V battery? I also have a couple of 12v halogens, but I’ll need at least 4 (possibly 5) to meet the required voltage. So I’ve ordered a pack of 100W 12V halogens that should get here by the weekend...

I’m currently without a controller so can’t use the motor to discharge. I’m waiting for a baserunner and a BAC855. I’ve ordered a DMM and a wattmeter, which I will use from now on when charging/discharging. Whilst I wait for those, I plan to wire together 5x12v100w halogens for discharging...

None of the phone apps that can interface with my BMS allow me to change configurations. That’s not to say there isn’t one. It could be that I’ve just not found the correct app. I’m not sure of the model of Smart BMS. I plan to take apart the case later today. The charger I have came with the...

thanks John - that information is extremely helpful. So I’ve just ordered a 14S Active Balancer, should be here on Thursday. In the mean time I’ll learn how to use it. I’ve not changed any battery/charge settings myself, so perhaps the BMS is “faulty”. What’s confusing me now is, the...

I have the 52V 14S7P from em3ev and according to the smart-BMS, I’ve over-charged the battery. In an attempt to discharge, I’ve left the battery switched-on unconnected to any devices and the voltage has decreased slightly. I’m also seeing a voltage diff of 188mV between highest voltage and...

The bike is definitely in need of an upgrade. When I first bought this kit I was on a tight budget. I'm now able to spend much more on the bike. I wish I could get my hands on a phaserunner. They're sold out and according to Grin Tech, not expected to be in stock until Summer 2022 at the...

I’m in need of a new controller. I’ve been powering a MAC 2000W 8T rear hub, with a 52V battery (14S7P). The controller I have been using is a 12fet 3077 and came with the bundle I purchased from em3ev. The controller has now failed me and I’d like to upgrade to something less budget. Not...