Search found 294 matches

by NickF23
Aug 29 2020 7:25am
Forum: E-Bike Non-hub Motor Drives
Topic: Panasonic XU1 Mods
Replies: 1
Views: 98

Re: Panasonic XU1 Mods

I don't think Panasonic sell this yet in America or Europe or other English speaking countries so it might be hard to find other users/ mods unless there are Japanese ebike forums somewhere. Looks like it's going to be sold as the GXO according to press releases. I hope they do release it in other m...
by NickF23
Aug 28 2020 9:38am
Forum: E-Bike Build Threads / Photos & Video
Topic: A few of my newer ebikes
Replies: 17
Views: 601

Re: A few of my newer ebikes

I love that first bike, got a 1970's futuristic look to it. Shame it was stolen.
by NickF23
Aug 24 2020 3:17pm
Forum: Battery Technology
Topic: Balance charging 2 x 7s Lipo
Replies: 5
Views: 109

Re: Balance charging 2 x 7s Lipo

Most people I've seen with hobby chargers use cheap mean well clones with screw down terminals. But you could put whatever connectors you like on. If you get a psu that is closer to the output voltage the charger will have to do less work and might be less noisy.
by NickF23
Aug 24 2020 5:55am
Forum: E-Bike General Discussion
Topic: Micro-house ebike build
Replies: 18
Views: 451

Re: Micro-house ebike build

I would choose xps or phenolic foam over expanded polystyrene as they are better insulation. xps is waterproof. Both are available is single sheets from a builders merchants, often with reflective mirroring on both sides. someone probably sells a flexible sheet for the the curve. You might want to s...
by NickF23
Aug 23 2020 6:00pm
Forum: Battery Technology
Topic: Charging voltage cutoff device
Replies: 5
Views: 123

Re: Charging voltage cutoff device

Because you are reducing the voltage you might find it easier to just modify your charger, there's quite a few threads here on that topic , try searching 'adjustable charger mod' 'or 'variable voltage charger' there's also good vids on youtube. Also have a search for your model of charger, many char...
by NickF23
Aug 22 2020 7:28am
Forum: Battery Technology
Topic: What should these BMS settings be?
Replies: 5
Views: 343

Re: What should these BMS settings be?

I'll have a go at answering your questions but bare in mind I'm just building my first lithium pack with a bms with similar settings so I'm just learning as I go along also. Critical responses welcome. >Over Voltage: 4.0v I recommend leaving this setting at stock. If you're vehicle has regen then th...
by NickF23
May 03 2020 8:32pm
Forum: E-Bike Technical
Topic: Are there any decent cheap chargers (13s Lithium ion)?
Replies: 8
Views: 410

Re: Are there any decent cheap chargers (13s Lithium ion)?

meanwell led driver., Highest quality electronic product in the house, no fan and waterproof which is also nice. Variable current and voltage within a certain range which is different for each model. If want to buy then search through the specs sheets to find the model that fits your needs there is ...
by NickF23
Aug 16 2019 10:12am
Forum: Battery Technology
Topic: BMS for a 20s NiMH 9000mAh pack, GP 900 DHC cells.
Replies: 4
Views: 366

Re: BMS for a 20s NiMH 9000mAh pack, GP 900 DHC cells.

Your controller should prevent overdischarge of the string by cutting out at 20 volts or around that. This doesn't protect individual cells but if you have a bad cell you can replace it. This isn't such a serious situation as with lithium, if you overdischarge a lithium cell it becomes a fire risk.
by NickF23
Aug 16 2019 10:06am
Forum: Battery Technology
Topic: BMS for a 20s NiMH 9000mAh pack, GP 900 DHC cells.
Replies: 4
Views: 366

Re: BMS for a 20s NiMH 9000mAh pack, GP 900 DHC cells.

NIMH batteries don't need the kind of battery management systems that lithium batteries use. NIMH are designed to be overcharged which allows a series string to be balanced on charge. Typically a charger will connect to a thermistor (or a few thermistors) inside the pack which will help terminate ch...
by NickF23
Jun 17 2019 2:48pm
Forum: Items for Sale - Used
Topic: Kalkhoff 2008 w/ Panasonic motor (non-working)
Replies: 2
Views: 453

Re: Kalkhoff 2008 w/ Panasonic motor (non-working)

In case your not familiar with the bike it's a power assist with a torque sensor so the motor won't do anything unless you're out on the bike pedalling.
by NickF23
May 14 2019 4:22pm
Forum: Battery Technology
Topic: PANASONIC ebike battery change
Replies: 50
Views: 11091

Re: PANASONIC ebike battery change

Not all Panasonic drive ebikes go into emergency mode. You can test to see if yours will by covering up the data pins with tape and trying to cycle on a fully charged battery.

http://www.flecc.uk/p/li_battery.html to see which pins
by NickF23
Apr 22 2019 5:11pm
Forum: Battery Technology
Topic: Lead acid anyone?
Replies: 51
Views: 3733

Re: Lead acid anyone?

Sealed lead acid batteries are great for mobility / disability scooters. That's because the extra weight is an advantage. By putting the heavy SLA batteries low in the scooter it lowers the centre of gravity and stops the scooter falling over and injuring the rider. Range isn't an issue either 24v 5...
by NickF23
Apr 10 2019 7:08pm
Forum: Battery Technology
Topic: Li-ion battery charger suggestion
Replies: 30
Views: 1597

Re: Li-ion battery charger suggestion

There seems to be an infinite number of meanwell led driver psu models, all with different specs. Here's a thread on 2 types that have a variable output range that could charge both 36 and 48v batteries. https://www.endless-sphere.com/forums/viewtopic.php?t=92316 I have an HLG 150 watt model and its...
by NickF23
Mar 22 2019 11:34am
Forum: E-Bike Technical
Topic: 84V 3A Charger for Li-ion Battery?
Replies: 1
Views: 227

Re: 84V 3A Charger for Li-ion Battery?

you should be able to find an meanwell power supply for most voltages. Here's one but at around 1.7 amps is a bit less than you wanted. There's probably more but you have to search https://www.mouser.co.uk/ProductDetail/MEAN-WELL/ELG-100-C1050B?qs=sGAEpiMZZMvV8Y9YugmIgqWA%2FF1iXuxjo9Xbm7eRkwtDCWNBNe...
by NickF23
Nov 25 2018 10:08pm
Forum: E-Bike General Discussion
Topic: Battery Fire.
Replies: 39
Views: 3142

Re: Battery Fire.

I think Tesla cells are more dangerous than other 18650 cells because they don't have ptc or thermal cutout, this doesn't matter when they are in a module with fuses, bms and cooling system, but when removed they are at least as dangerous as lipo and should be handled with due respect. https://batte...
by NickF23
Mar 10 2018 10:10am
Forum: Items for Sale - New
Topic: SOLD Kepler Drive unused ( UK - South)
Replies: 4
Views: 711

Re: Kepler Drive unused ( UK - South)

Signed delivery to America/Australia and Europe is 14 USD.

Chilltrout has not replied to my messages yet so the drive is still available.
by NickF23
Mar 04 2018 7:33am
Forum: Items for Sale - New
Topic: SOLD Kepler Drive unused ( UK - South)
Replies: 4
Views: 711

SOLD Kepler Drive unused ( UK - South)

I bought this awesome bit of kit in April 2017, but I have too many projects on at the moment and not enough funds :( It's as it was the day it was sent to me. The price is 110 USD. The cost new was 100 dollars, but there is an additional $10 Brexit surcharge because the British pound collapsed in v...
by NickF23
Feb 21 2018 5:32pm
Forum: E-Bike General Discussion
Topic: Cheap high rate 24V pack?
Replies: 11
Views: 1003

Re: Cheap high rate 24V pack?

Have you tried asking em3ev for a custom pack? They fit most of your criteria.
by NickF23
Jan 16 2018 2:16pm
Forum: Battery Technology
Topic: First Vruzend build.. voltage just short of 42v
Replies: 21
Views: 2187

Re: First Vruzend build.. voltage just short of 42v

If you put the string back together with a lower voltage cell it will become back into balance with the rest, reducing the higher voltage cells. I'm not sure how long it would take.
by NickF23
Jan 16 2018 1:15pm
Forum: Battery Technology
Topic: First Vruzend build.. voltage just short of 42v
Replies: 21
Views: 2187

Re: First Vruzend build.. voltage just short of 42v

From your latest results it seems that one cell in string 5 has a very bad connection or is disconnected from the rest of the pack. Thus all the rest of the cells in the string got more charge and therefore are a bit higher. It could also be a bad cell. I still suspect the bms killed the charge. Try...
by NickF23
Jan 15 2018 7:50pm
Forum: Battery Technology
Topic: First Vruzend build.. voltage just short of 42v
Replies: 21
Views: 2187

Re: First Vruzend build.. voltage just short of 42v

Possible sequence of events that caused this. Poor connection in string one and two caused the bms to see higher voltage on string one and two and start burning off the excess charge. bms then trips the pack before the voltage on these strings goes too high causing the whole charge to terminate earl...
by NickF23
Jan 14 2018 9:42am
Forum: E-Bike Non-hub Motor Drives
Topic: Chain tensioner with Shimano Nexus 3 and BBSHD
Replies: 5
Views: 1538

Re: Chain tensioner with Shimano Nexus 3 and BBSHD

I have a Sturmey-Archer tensioner that came with my Alfine 8. They do a series here with similar prices to the Shimano, so far it just works. http://www.sturmey-archer.com/en/products/chain-tensioners I've just ordered a chunkier 1/8 chain in the hopes that it will last longer than the 3/32 chains. ...
by NickF23
Jan 12 2018 8:48am
Forum: Items for Sale - New
Topic: DIY assembly kit for 18650 without spot welding/Soldering
Replies: 505
Views: 84769

Re: DIY assembly kit for 18650 without spot welding/Soldering

The existing kit is limited to 3.5a continuous per cell. This is fine for lower power ebikes like mine (500watt) and I'm going to try to build my own battery using this kit some time this year. I think the excitement has faded a little while people wait for v2 kit with higher discharge rates. I imag...