Search found 38 matches

by pickworthi
Feb 04 2021 1:02pm
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

Re: MH1 18650 Capacity - puzzled

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...
by pickworthi
Feb 03 2021 6:39pm
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

Re: MH1 18650 Capacity - puzzled

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...
by pickworthi
Feb 03 2021 4:40am
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

Re: MH1 18650 Capacity - puzzled

Working on it - had to do something else for her indoors yesterday :(
by pickworthi
Feb 01 2021 2:36pm
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

Re: MH1 18650 Capacity - puzzled

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...
by pickworthi
Feb 01 2021 6:15am
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

Re: MH1 18650 Capacity - puzzled

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...
by pickworthi
Feb 01 2021 5:02am
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

Re: MH1 18650 Capacity - puzzled

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...
by pickworthi
Jan 31 2021 5:35pm
Forum: Battery Technology
Topic: MH1 18650 Capacity - puzzled
Replies: 19
Views: 545

MH1 18650 Capacity - puzzled

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...
by pickworthi
Jan 30 2021 9:18am
Forum: General Discussion
Topic: iCharger LogView -> DataExplorer -> Linux version
Replies: 1
Views: 206

iCharger LogView -> DataExplorer -> Linux version

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...
by pickworthi
Jan 25 2021 10:06am
Forum: Battery Technology
Topic: 10S balance plugs (2x5s) short protection?
Replies: 6
Views: 223

Re: 10S balance plugs (2x5s) short protection?

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 ...
by pickworthi
Jan 25 2021 3:40am
Forum: General Discussion
Topic: Calling All Linux Users(who want to help a newb)
Replies: 19
Views: 1226

Re: Calling All Linux Users(who want to help a newb)

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...
by pickworthi
Jan 24 2021 3:11am
Forum: Battery Technology
Topic: 10S balance plugs (2x5s) short protection?
Replies: 6
Views: 223

Re: 10S balance plugs (2x5s) short protection?

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...
by pickworthi
Jan 24 2021 3:06am
Forum: Battery Technology
Topic: 10S balance plugs (2x5s) short protection?
Replies: 6
Views: 223

Re: 10S balance plugs (2x5s) short protection?

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...
by pickworthi
Jan 23 2021 8:21am
Forum: Battery Technology
Topic: 10S balance plugs (2x5s) short protection?
Replies: 6
Views: 223

10S balance plugs (2x5s) short protection?

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...
by pickworthi
Jan 22 2021 5:16pm
Forum: EBike General Discussion
Topic: Connector name please
Replies: 3
Views: 114

Re: Connector name please

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

Many thanks, I really appreciate it.
by pickworthi
Jan 22 2021 4:20pm
Forum: EBike General Discussion
Topic: Connector name please
Replies: 3
Views: 114

Connector name please

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...
by pickworthi
Jan 22 2021 4:15am
Forum: E-Vehicles General Discussion
Topic: UK petition to legalise personal electric vehicles
Replies: 7
Views: 371

Re: UK petition to legalise personal electric vehicles

.....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...
by pickworthi
Jan 13 2021 8:06am
Forum: General Discussion
Topic: Gloves for working with batteries and electronics
Replies: 9
Views: 711

Re: Gloves for working with batteries and electronics

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...
by pickworthi
Jan 13 2021 4:23am
Forum: General Discussion
Topic: Gloves for working with batteries and electronics
Replies: 9
Views: 711

Re: Gloves for working with batteries and electronics

Wot?
(This was in response to a weird post - which has now gone.)
by pickworthi
Jan 05 2021 9:26am
Forum: General Discussion
Topic: Gloves for working with batteries and electronics
Replies: 9
Views: 711

Re: Gloves for working with batteries and electronics

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...
by pickworthi
Jan 05 2021 8:21am
Forum: General Discussion
Topic: Gloves for working with batteries and electronics
Replies: 9
Views: 711

Gloves for working with batteries and electronics

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...
by pickworthi
Jan 05 2021 4:40am
Forum: General Discussion
Topic: Electronic load for testing - any thoughts on ET5410?
Replies: 6
Views: 1327

Re: Electronic load for testing - any thoughts on ET5410?

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 ...
by pickworthi
Dec 22 2020 4:26am
Forum: General Discussion
Topic: Electronic load for testing - any thoughts on ET5410?
Replies: 6
Views: 1327

Re: Electronic load for testing - any thoughts on ET5410?

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.
by pickworthi
Dec 21 2020 3:37pm
Forum: General Discussion
Topic: Electronic load for testing - any thoughts on ET5410?
Replies: 6
Views: 1327

Electronic load for testing - any thoughts on ET5410?

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...
by pickworthi
Nov 30 2020 6:09pm
Forum: General Discussion
Topic: Linux geeks thread
Replies: 28
Views: 1215

Re: Linux geeks thread

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.
by pickworthi
Nov 29 2020 7:01am
Forum: General Discussion
Topic: Linux geeks thread
Replies: 28
Views: 1215

Re: Linux geeks thread

That's a lot of words to say Geek :)