Endless Sphere

Very nice Nuxland! Looks like those LiPO's are doing the job nicely, 8kg lighter, 5AH more, while pushing out more amps.

Did you measure any temperatures?

...the added risks of compression joint resistance I do get your point but is it not a bit overrated? I mean there are people (e.g. Shawn McCarty with batteryblocs) who have been using magnets and compression for years without issues apparently. Also we're all using XT90-like connectors to connect/...

Thank you for performing this tests!! There are interesting statistics about these cells. The Sony VTC6 will have reached the 700 cycles soon. The other cells soon after. What cells are you going to test after? That is actually a very good question :) I've always been intrigued about RC LiPO cycle ...

Tesla have a patent that utilises magnets as part of their cell level fuse idea

https://patents.google.com/patent/EP2416405A1

Week bump

I've found a seller on ebay for Nickel Plated Copper Strips but they only supply to NA, I'm looking for similar dimensions of 8mm x 0.3mm, I'm based in the UK

https://rover.ebay.com/rover/0/0/0?mpre ... 3104900615

Hey guys. Hope everyone has had a good holiday and that the fat jolly man brought you all lovely e bike bits you wanted. Searching through the forum I've struggled to really find any ideas for a charger. I've only really found the ones from luna reccomended and don't really want to order from them....

Hi hary, Thank you for your feedback, however, again, this is not a DIY or hack-oriented product. What you are asking for is to be expected if it was... Please note this sales thread was started 4 years ago, when the product was released. Then it was very interesting to get some feedback and these ...

Polycarbonate is a good choice, impact resistant but scratches easily, if scuffs dont matter its a good choice, I opt for black polycarbonate in my battery case builds now.

I would have to recommend the Samsung 20S or Samsung 30T or 40T if you want to tackle this, they punch a lot harder than the VTC6

Inwo wrote: ↑

Nov 28 2019 12:08am

All are AB ready?
That is all I need for now.

CryB4Die wrote: ↑

Nov 28 2019 8:21am

Are all the sevcon gen4 controllers Hall sensor (UVW Sensor) ready?

Thanks in advance

Yep thats right, all of them support AB and UVW, only certain models support Sin/Cos

Anyone know if some Gen4 are specialized in hardware? I have some S4-sevcon 634a83203 Also S6 that have been tested with both induction motors and PMAC. - 634a85203 Would the "203" relate to encoder type? I have a chance to buy S4s - 634a83310 The S6 were matched to 8kw PMAC. If the S4 will work on...

technotony007 wrote: ↑

Nov 27 2019 11:30am

ok , please let me know the cost all in for shipping is to uk ,for the sevcon unit , and a dongle if you have one,

regards

tony

Contact Phil at VoltSport.co.uk, good guy and hes a direct supplier of Sevcon

I literally had this dilemma a couple of weeks ago and settled for the Samsung 20S cells which have a CDR of 30A with 250 cycles, now because the majority of the time you won't be at peak CDR all the time and you can under charge them to 4.1v to gain a few more cycles its not as bad as you may think...

ENNOID wrote: ↑

Sep 28 2019 8:34am

@Upperfoot:

I might have something to offer with my ENNOID-BMS & battery modules, see thread details:
viewtopic.php?f=14&t=92952&start=75

Thanks ENNOID sent you an email

The eltek flatpack is about £200 used for a 3kw supply, a board for it costs £42, I already know how to configure it via CAN with an Ixxat, from the wealth of information out there and the fact I'm a software architect and have programmed Sevcon controllers I am 100% confident it wont be an issue. T...

A problem with RC motors is the lack of torque, they focus on RPM primarily, if it cant provide enough torque you will need to gear it or slap a torque converter on it otherwise it will have trouble moving and will likely overheat. Look at a Motenergy motor, they are far cheaper and more suited to t...

Its an extra layer of connectivity, nothing to be afraid of. i am not afraid, but it is a extral layer of complications and cost that is simply not needed. there is no need for a matched system to have the bms and charger to talk to eachother in the first place. they dont have anything to say to ea...

I will be using the Orion JR bms on the pack, and using an Eltek charger alongside it (they both communicate together via CAN)The idea is two packs connected in series both with their own bms please dont use canbus for this. its totally not needed for the charger to talk to the bms in applications ...

Just had a thought, I could just have the charger and bms as one unit, less weight and less complex battery system and all I need is a connector that will integrate all 16 bms leads and main power. My controller handles under and over voltage and current so I don't exactly need to double up on it, a...

Thanks guys for the input, lots to re-evaluate, if I'm selling these packs on I think high rate 18650 is the best choice for my own piece of mind as they are arguably a safer format. A few comparisons against would be; Turnigy Graphene 8AH 6S 15C - 120 amps cont - 1.1kg - £90 (pack I use now for com...

that is a realy nice toy. what part number sevcon do you have? that makes it more clear in what your limits are. i have a couple size 4 110V here but that can do "only" 300A. if you are looking into replacing the pouches for something more robust and simper to charge its fairly easy to do, do you w...

Do one better, interview about it at 8 minutes, racing in the wet

what are your controller limits in voltage? getting the maximum voltage means you notice less amp losses and the amps are lower in general. you can also use a controller that is "power aware" like a sevcon so you can enact limits based on kW instead of amps (or both) that should even out the perfor...

To be specific LiPo is an issue because of maintenance with storage voltage, LifePo4 is an issue because of extra weight and cost, 18650 has an issue with the steep discharge curve. I'm looking for ways to mitigate those problems so I can evaluate my options with a better understanding. If you want ...