Search found 296 matches

by flangefrog
Apr 01 2018 9:06am
Forum: Battery Technology
Topic: Bluetooth 10-15s bms review
Replies: 41
Views: 3785

Re: Bluetooth 10-15s bms review

I measured 20mV across the mosfets while putting 17A from C- to P- with 10VGSS. So that works out to just under 6mΩ per mosfet which seems about right.
by flangefrog
Apr 01 2018 5:42am
Forum: Battery Technology
Topic: Bluetooth 10-15s bms review
Replies: 41
Views: 3785

Re: Bluetooth 10-15s bms review

Just a note, the 30A model only comes with an aluminium "heatsink" plate on one side of the PCB. I think the 60A model and probably the 40A model have one on both sides. I'd recommend the ON Semiconductor/Fairchild FDB86363-F085 as a good replacement FET in the same D2Pak package with 2.0mΩ typical ...
by flangefrog
Mar 29 2018 7:11am
Forum: Battery Technology
Topic: Bluetooth 10-15s bms review
Replies: 41
Views: 3785

Re: Bluetooth 10-15s bms review

I recently received one of these BMSs and of course the first thing I did was take it apart. Here are some photos I took. https://i.imgur.com/yemDqH0.jpg https://i.imgur.com/iyxNQp7.jpg https://i.imgur.com/QwCMRD8.jpg https://i.imgur.com/T4ZZhfx.jpg https://i.imgur.com/VxHSTTd.jpg https://i.imgur.co...
by flangefrog
Nov 04 2016 6:07am
Forum: E-Bike General Discussion
Topic: Leaving charger connected but switched off?
Replies: 4
Views: 530

Re: Leaving charger connected but switched off?

It depends on the charger. If it has a relay then it will probably be fine.
by flangefrog
Nov 03 2016 5:45am
Forum: Battery Technology
Topic: 150V 20A 300W CC/CV Electronic Load
Replies: 1
Views: 766

Re: 150V 20A 300W CC/CV Electronic Load

http://i.imgur.com/Ndf5cfm.jpg Modbus ASCII Protocol Serial port configuration Baud rate: 9600 Data Bits: 8 Parity/check bit: none Stop bit: 1 Command format Address Command [ Address Command ]... E.g. ALL-FS-ON 000CC 000ON ALL-CX Write the address then the command with no spaces in between. Make s...
by flangefrog
Nov 02 2016 8:24am
Forum: Battery Technology
Topic: Battery issue and questions
Replies: 18
Views: 1716

Re: Battery issue and questions

I believe Karl posted something a while back about using the battery charging wires to run other DC things like lights. I think he was referencing Anderson connectors or something similar. I wonder if I could do the same thing with a barrel connector providing I maintain the correct polarity? If I ...
by flangefrog
Nov 02 2016 8:15am
Forum: E-Bike General Discussion
Topic: phase wires fixing
Replies: 4
Views: 648

Re: phase wires fixing

Grin Tech sells some nice motor cable with teflon insulation: http://www.ebikes.ca/shop/ebike-parts/w ... cable.html
by flangefrog
Nov 02 2016 6:52am
Forum: Battery Technology
Topic: 150V 20A 300W CC/CV Electronic Load
Replies: 1
Views: 766

150V 20A 300W CC/CV Electronic Load

I recently bought this Sousim LG300WA electronic load from sincerepartner on eBay. They also have a 150W model , and higher current versions (30A/40A) of the 300W model . They probably also have higher current 150W models. The listings seem to come in and out of stock. Search their store for "electr...
by flangefrog
Nov 02 2016 6:37am
Forum: E-Bike Technical
Topic: Changing LVC of controller
Replies: 6
Views: 767

Re: Changing LVC with KT-LCD1?

As far as I know all 48V versions automatically switch between a 36V or 48V LVC. If the controller has the original sticker on it (i.e. not from bmsbattery) it should have 36/48 in the model name. See this post for the resistor to change (at least if your controller has the same board) https://endle...
by flangefrog
Nov 02 2016 5:37am
Forum: E-Bike Technical
Topic: Changing LVC of controller
Replies: 6
Views: 767

Re: Changing LVC with KT-LCD1?

You can change the LVC with the C12 parameter but only by a small amount. You can also modify the LVC resistor in the controller itself.
by flangefrog
Oct 27 2016 12:59am
Forum: E-Bike General Discussion
Topic: Single Gear Stealth Build - Battery in Frame Tubes
Replies: 80
Views: 8784

Re: Single Gear Stealth Build - Battery in Frame Tubes

That controller is sensorless and it might have trouble with these motors, especially with their high eRPM. The main voltage limiting component (other than fets and caps) will be the LM317 which could be replaced with a TL783 (pin compatible, may or may not be a drop in replacement).
by flangefrog
Oct 26 2016 4:30pm
Forum: Battery Technology
Topic: How does a BMS work
Replies: 10
Views: 1290

Re: How does a BMS work

BShady wrote:what power supply supply would you use for a 12s li-ion BMS?
For most lithium chemistries except for LiFePo4 the charging voltage would be 4.2V/cell = 50.4V. You can buy chargers of eBay/AliExpress.
by flangefrog
Oct 23 2016 6:13pm
Forum: Battery Technology
Topic: How does a BMS work
Replies: 10
Views: 1290

Re: How does a BMS work

All the BMS does is balance the cells, protect against too high/low cell voltages and too high charge/discharge current. The balancing circuits cut off the charging current and bleed down any cells which are too high when the battery is being charged. This is called top balancing. It doesn't balance...
by flangefrog
Oct 22 2016 6:44am
Forum: E-Bike General Discussion
Topic: Single Gear Stealth Build - Battery in Frame Tubes
Replies: 80
Views: 8784

Re: Single Gear Stealth Build - Battery in Frame Tubes

There are several tools to help screw the nipple on with deep rims: The IceToolz 12S4 can be had very cheap on eBay: http://www.icetoolz.com/ec99/ushop10074/GoodsDescr.asp?category_id=68&parent_id=50&prod_id=12S4 Some more that are adjustable such as the Problem Solvers driver: http://www.wheelfanat...
by flangefrog
Oct 21 2016 3:15pm
Forum: Resources & EV Related Parts and Services
Topic: Products that you just can't seem to get
Replies: 6
Views: 1554

Re: Products that you just can't seem to get

There's a leather cover for dolphin batteries: http://www.bicyclejunction.co.nz/products/linus-roadster-electric This version is not waterproof but you can probably get one made. This is the manufacturer: http://meniscus.nz/ I'm sure you could find somone local who could make something similar. http...
by flangefrog
Oct 21 2016 1:58am
Forum: Battery Technology
Topic: bms and spot welder
Replies: 5
Views: 673

Re: bms and spot welder

The best spot welder you can get for less than a few thousand dollars is one of these. You can't buy them at the moment but they're not hard to build and cost < $50 USD (plus car battery) without probes. JP spot welder: https://endless-sphere.com/forums/viewtopic.php?f=31&t=68865 DIY spot welder thr...
by flangefrog
Oct 16 2016 4:27pm
Forum: E-Bike Technical
Topic: Sturmey-Archer 5-speed hub, it's real!
Replies: 77
Views: 11319

Re: Sturmey-Archer 5-speed hub, it's real!

I would love to swap my Boris the Brut Sprung rear cassette and hub for a 5 spd IGH in 197mm. Belt drive would be the proverbial icing on the cake. Your bike couldn't support any kind of internal gear hub, no matter the width, because it uses through axles. And of course in order to use a belt driv...
by flangefrog
Oct 16 2016 3:16am
Forum: Battery Technology
Topic: Over-discharged prismatic cells
Replies: 1
Views: 217

Over-discharged prismatic cells

I have been running a small class D amp off 4S CALB-CA40 prismatic cells for a couple of months. I forgot that the cells were only charged to storage voltage and today they finally ran out and puffed up. The voltages ranged from 1V to 1.7V, but after sitting for a few hours they have settled to 1.5V...
by flangefrog
Oct 15 2016 4:12pm
Forum: E-Bike General Discussion
Topic: BB7 Rotor recommendations
Replies: 24
Views: 1088

Re: BB7 Rotor recommendations

I've seen some recommendations for Alligator rotors. Note that some models are very light and may not be good for long descents. I'm not sure how their brake track compares to the G2. Some are probably smaller. You can find them on eBay. Velogear have rotors from several brands including Avid and Al...
by flangefrog
Oct 15 2016 2:12pm
Forum: E-Bike Technical
Topic: Fixed voltage charging question.
Replies: 3
Views: 297

Re: Fixed voltage charging question.

Yes, but the BMS may not balance the cells as it might be set to balance at a higher cell voltage. You can charge it to 100% occasionally and leave the battery connected to the charger for a long time to balance it.
by flangefrog
Oct 14 2016 9:37am
Forum: E-Bike Technical
Topic: Sturmey Archer drums mounted backward
Replies: 8
Views: 792

Re: Sturmey Archer drums mounted backward

I might be misunderstanding what you're doing, but why not simply use the drum brakes that come in a left and right version?
http://www.sturmey-archer.com/en/products/sd-hubs
by flangefrog
Oct 13 2016 12:42pm
Forum: E-Bike Technical
Topic: S06S Controller bypass of LCD for Pedal Assist to work
Replies: 8
Views: 973

Re: S06S Controller bypass of LCD for Pedal Assist to work

Leaving the jumpers in place with the LCD plugged in will prevent the LCD sending information to the controller and also stop the LCD cutting the power from the controller.