Endless Sphere

I think you have hit my particular nail on the head, thanks. In my view, there is no test, however "accurate", that accurately simulates a real life ride. There are no circumstances where I will subject a battery to a continuous current discharge on the bike. The most common is a medium to...

I've re-run my tests, this time with the following adjustments: Full charge set to 4.1V per cell Discharge cut off voltage set to 3.2V per cell Single cell discharge at 1.8A, 4p discharge at 7.2A, so both .58C Disabled balance at end of discharge for the 4p pack (forgot that one before). Results: Si...

Working on it - had to do something else for her indoors yesterday

Remember the saying about opinions are like A55holes....?....every body has one ! My favourite actor - Clint Eastwood :D This is one of the main problems in gathering information in this forum (and Internet in general) - telling actual experience/data apart from opinions. I've just started with DIY...

There are many posts on this forum saying that the best low voltage cut off for Lithium cells is 3.5V. Based on reading these posts I concluded that this was a strategy for prolonging the life of a battery. Is your view that regular discharge to 3.0V per cell will be OK? Or does it depend on the cel...

Thanks for the responses. I'm not trying to determine if the cells are at manufactured spec. I would like to try and find a way of predicting a battery usable capacity from a single cell. Saying a 4p MH1 pack has a capacity of 12400 mAh (i.e 3100 x 4) is meaningless to me, since I would never discha...

I have a batch of MH1 cells - manufactured together so near identical if I understand things correctly. I've done a discharge test on one cell from the batch, and on a 10s4p battery that I built from the batch. The thing that is puzzling me is that I found the single cell provided 2012 mAh on its di...

I recently acquired an iCharger 4010DUO, which provides comprehensive logs for analysis. The documentation for the 4010DUO gives the following web site for the LogView software: http://www.logview.info/forum/ This site is clearly dead, is no more, gone to the great webmaster in the sky, <insert appr...

Many thanks for the suggestions. I hadn't thought of physical protection, so you opened up new possibilities for me here. I think I may still follow up on your suggestion of making a custom balance board connector setup. It appeals to my engineer side. However, it occurred to me that I had a simple ...

No plans to switch to Linux quite yet, but if I were to, I would need to use a sandbox/vm to play Steam games. One of the videos I watched mentioned that Steam is now on Ubuntu and Mint. I'm not a gamer, so I didn't look into it more, but I think you'd be good to go. Unless I'm not fully understand...

Can you calibrate out the voltage drop off the fuse. That's what you are doing when you ad a fuse Gesendet von meinem CPH1911 mit Tapatalk The 4010DUO measures the individual resistance from each of the cells, it has a display showing all of them. It's documentation says it takes the cell resistanc...

But first, is this "balance board" for the charger (or the charger itself) something that combines both of the connectors it has into a single parallel connection? I ask because this is the way most of them work, and it would be bad for your setup to do that. ;) All the BBs I have here fo...

I've attached a diagram showing the wiring of a 10S battery I have built. The charging BMS will be me and a 4010DUO charger. Discharge short protection is via 15 amp fuse - which is the maximum expected load through the e-bike motor controller (UK regs limited). My question is about protecting the b...

I could give you guys a hug if it wasn't for social distancing

Many thanks, I really appreciate it.

I'm feeling a bit stupid about this. I've searched for every form of JST connector I can think of, but I just can't find one that matches the white connector at the bottom of the circuit board in the attached picture. It's hard to order replacements when one can't give a part name :-( Can anyone tel...

.....many of which are illegal on public roads in the UK. All of which are illegal on public roads and pavements in the UK. Anything that isn't a pedal assist bicycle has to get specific type approval, and there is no type for e-scooters and the like. Some limited trials are being run in a few citi...

But that never saved me from putting the wrong polarity connector on a wire, then connecting up to get a KFF. There was a show a while back on UK TV called Scrapheap Challenge. Your reply made me think of it, since whenever a team connected a gearbox to whatever contraption they were building, they...

Wot?
(This was in response to a weird post - which has now gone.)

When pack building, I wear leather gloves. .... Thanks for the response. I'm guessing you use really soft/thin leather gloves? Just wondering how pliable they need to be when soldering balance wires for example. Good point about the nickel being sharp. It seems that good practice is to round off al...

I've been watching a lot of YouTube videos of battery building and electronic circuit building to try and educate myself on best practice (and just learn in general). I see that most presenters who seem to know what they are doing wear some sort of glove. There seem to be two types used mainly: - Ni...

Thanks for the pointers, The EBD-A20H looks really nice. Unfortunately the 30V limit is just short of what I will be using it for most of the time. I searched for ZTE and ZKETECH and my searching skills must suck worse than I thought. I didn't find anything in the 42V category I need. Several quite ...

Thanks for the link to Grin stuff - I'll have a look. Not had good experiences shipping from USA/Canada to UK in the past.

I'm afraid my hillbilly tolerance level isn't high enough to watch the videos through.

I have been thinking of building my own restive load device. I don't need anything fancy, just enough load to discharge a 10S Lipo battery pack safely, although some flexibility would be nice. For context, I'm in the UK, and have a street legal e-bike. Staying legal means I'm in a power range that t...

atop - for overall system usage, quickly picks out hot spots.
htop - for CPU and task monitoring. I like that it shows all threads as well as root task.

Plus, a comprehensive overnight health check that sends me the results in an email. Custom script.

That's a lot of words to say Geek