Search found 109 matches

by Upperfoot
Oct 16 2020 7:27am
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 8
Views: 268

Re: 3.8Mw Electric hypercar

Well a dragster was being worked on with those specs (exc range) https://insideevs.com/news/408448/ev-dr ... australia/
by Upperfoot
Oct 03 2020 7:12am
Forum: E-Bike Build Threads / Photos & Video
Topic: Vector bike and frame owners.
Replies: 1079
Views: 165865

Re: Vector bike and frame owners.

Vector is a reseller for Eleek frames FYI, though they do interchange some of their components for higher quality variations (Brakes being an example)
by Upperfoot
Aug 11 2020 10:15am
Forum: Large EV General Discussion
Topic: Go Kart Update
Replies: 77
Views: 12835

Re: Go Kart Update

Hello Hallkbrdz,

The pack has been retired in favor of a custom 18650 pack which is being UN38.3 tested, I'll update you guys with an update as quite a few things have changed as it's now a commercial venture, still want to share the knowledge and experience I've gained over the last 12 months!
by Upperfoot
Jun 29 2020 1:38pm
Forum: Items for Sale - New
Topic: li-ion 18650 Adjustable size BATTERY HOLDER - Honeycomb Layout
Replies: 57
Views: 17806

Re: li-ion 18650 Adjustable size BATTERY HOLDER - Honeycomb Layout

Just purchased some to try out, they fit together brilliantly, come with little tools to help you assemble and disassemble the pack so you don't cut your fingers to shreds, will let you know how pack building goes.
by Upperfoot
Jun 26 2020 2:37am
Forum: Battery Technology
Topic: HobbyKing unable to provide UN38.3 and MSDS
Replies: 13
Views: 341

Re: HobbyKing unable to provide UN38.3 and MSDS

“Enlightening “..?? I think you are a bit late to the game here ? Did you really expect a chinese hobby battery supplier to comply with western regulations, standards, and documentation. ?? You should consider yourself fortunate that you got such an honest reply, and not just a bunch of forged “cut...
by Upperfoot
Jun 25 2020 11:35am
Forum: Battery Technology
Topic: HobbyKing unable to provide UN38.3 and MSDS
Replies: 13
Views: 341

Re: HobbyKing unable to provide UN38.3 and MSDS

Well, this has been an enlightening journey for me. I've passed the information onto the relevant regulatory agencies as it's a public safety risk, especially if those shipments are incorrectly put onto passenger flights. They'll most likely disappear and reappear as another name.
by Upperfoot
Jun 25 2020 11:13am
Forum: Battery Technology
Topic: HobbyKing unable to provide UN38.3 and MSDS
Replies: 13
Views: 341

Re: HobbyKing unable to provide UN38.3 and MSDS

So Lucky Stuff Limited is the distributor in the UK - https://support.hobbyking.com/hc/en-us/articles/360036342033-Do-you-have-a-warranty-return-address-in-Europe- Yuheng, Wu is the current owner - https://beta.companieshouse.gov.uk/company/07555774/officers Yuheng, Wu also works at Hextronik (tradi...
by Upperfoot
Jun 25 2020 10:42am
Forum: Battery Technology
Topic: HobbyKing unable to provide UN38.3 and MSDS
Replies: 13
Views: 341

Re: HobbyKing unable to provide UN38.3 and MSDS

Remember, there's a lot of these battery companies literally selling recycled garbage to their customers, so you can't really think they care about anything beyond money? If someone comes after them they probably just intend to disappear and crop up under some new name. (IIRC BMSBattery has already...
by Upperfoot
Jun 25 2020 9:43am
Forum: Battery Technology
Topic: HobbyKing unable to provide UN38.3 and MSDS
Replies: 13
Views: 341

HobbyKing unable to provide UN38.3 and MSDS

I wanted to send along some unused batteries under IATA PI965 Section IA and requested a UN38.3 certificate and MSDS for one of their LiPO products and I got the below response... how exactly are they shipping goods around without those two things?

Image
by Upperfoot
Jun 09 2020 8:32am
Forum: Battery Technology
Topic: BOSS LEVEL CUSTOM SPOT WELDER
Replies: 460
Views: 59786

Re: BOSS LEVEL CUSTOM SPOT WELDER

rojitor wrote:
Jun 09 2020 3:50am
Sorry guys. I have just buried my mom.
I have no time for this.
Kind wishes to you and your family
by Upperfoot
May 25 2020 12:58pm
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2717

Re: 30Ah 28s LiPo from 7s bricks

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?
by Upperfoot
May 22 2020 2:52am
Forum: Battery Technology
Topic: (semi)-solderless design: Attaching cells with solder tags using brass bolts
Replies: 16
Views: 514

Re: (semi)-solderless design: Attaching cells with solder tags using brass bolts

...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/...
by Upperfoot
Apr 28 2020 8:24am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 472
Views: 52316

Re: Li-ion cells cycle ageing

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 ...
by Upperfoot
Jan 24 2020 5:38pm
Forum: Battery Technology
Topic: Magnets holding copper bus onto cell, no-weld no-solder
Replies: 47
Views: 2958

Re: Covering 18650 cells with epoxy resin

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

https://patents.google.com/patent/EP2416405A1
by Upperfoot
Jan 01 2020 9:01am
Forum: Items Wanted
Topic: Nickel Plated Copper Strip EU Suppliers
Replies: 3
Views: 846

Nickel Plated Copper Strip EU Suppliers

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
by Upperfoot
Dec 30 2019 7:24am
Forum: E-Bike General Discussion
Topic: Which charger for UK
Replies: 7
Views: 455

Re: Which charger for UK

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....
by Upperfoot
Dec 30 2019 7:16am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 245
Views: 46754

Re: 5-16S Smart Tiny BMS preorder - 30/150/750A rated

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 ...
by Upperfoot
Dec 25 2019 4:35pm
Forum: Battery Technology
Topic: Battery case build
Replies: 5
Views: 594

Re: Battery case build

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.
by Upperfoot
Dec 05 2019 1:33pm
Forum: Battery Technology
Topic: High AMP battery build
Replies: 6
Views: 1299

Re: High AMP battery build

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
by Upperfoot
Nov 29 2019 8:23am
Forum: Motor Technology
Topic: Sevcon Gen4 model designations?
Replies: 9
Views: 1403

Re: Sevcon Gen4 model designations?

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
by Upperfoot
Nov 27 2019 3:03pm
Forum: Motor Technology
Topic: Sevcon Gen4 model designations?
Replies: 9
Views: 1403

Re: Sevcon Gen4 model designations?

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...
by Upperfoot
Nov 27 2019 2:25pm
Forum: Items Wanted
Topic: wanted sevcon Gen4 size 6
Replies: 5
Views: 1068

Re: wanted sevcon Gen4 size 6

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
by Upperfoot
Oct 21 2019 7:26am
Forum: Battery Technology
Topic: LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower
Replies: 32
Views: 2167

Re: LiFePO4 / Li ion Parallel pack, A123 hybrid for HighPower

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...
by Upperfoot
Sep 28 2019 9:44am
Forum: Battery Technology
Topic: Battery options for electric kart
Replies: 29
Views: 1342

Re: Battery options for electric kart

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 :thumb: