Search found 42 matches

by Taswegian
Feb 28 2020 1:08am
Forum: E-Bike Technical
Topic: Hub Motor Bafang G310 Replacement Gears
Replies: 1
Views: 50

Re: Hub Motor Bafang G310 Replacement Gears

Hi, I need new nylon gears for my BAFANG G310. I'm looking for supplier other than Grin which is out of stock. Would someone have a good address? Thx :) I've bought motors from FietsUnie and been happy with them I see they have gears listed for the G320 here; https://www.fietsunie.nl/BAFANG-FM-G320...
by Taswegian
Feb 27 2020 3:53am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1035
Views: 140510

Re: kWeld - "Next level" DIY battery spot welder

The shop only appears to have the Kcap that comes prepopulated with 6x BCAP0310, wasn't there previously a board-only version for people supplying their own caps?
by Taswegian
Feb 27 2020 3:41am
Forum: Battery Technology
Topic: LiGo vs LiGo+ Battery Modules
Replies: 3
Views: 111

Re: LiGo vs LiGo+ Battery Modules

Why LiGo Plus is more suitable when using only 2 or 3 modules? Different cells inside. LG MG1 vs Samsung 30Q. The latter are rated for higher current. Fewer modules implies higher current demand per module. Note that higher current is not universally better, cells are always a compromise between en...
by Taswegian
Feb 19 2020 6:58pm
Forum: Battery Technology
Topic: Top 3 (18650 cells) for high continous Amp output?
Replies: 17
Views: 654

Re: Top 3 (18650 cells) for high continous Amp output?

More info needed, it depends what you mean by high amps.
What is the full spec of the bike and how big a pack are you willing to use?
What kind of cycle life are you hoping to see?
etc etc
by Taswegian
Feb 17 2020 3:44pm
Forum: Battery Technology
Topic: 3D Printed Hailong/Reention Style E-Bike Battery Case
Replies: 12
Views: 761

Re: 3D Printed Hailong/Reention Style E-Bike Battery Case

PETG is great. Less ultimate strength than PLA but not brittle. The bit of ductility / flex makes it far more impact resistant so more useful in a lot of utilitarian applications. Print a bit hotter for better layer adhesion, I'm using 90/250 (85/240 first layer) and the print is still very clean wi...
by Taswegian
Feb 15 2020 7:47pm
Forum: E-Bike Technical
Topic: Please review this before I place an order
Replies: 4
Views: 360

Re: Please review this before I place an order

Is a derailleur an option? The sim suggests that in this power class a GMAC can be far stronger than a TCDM at low speed if fed enough current whilst retaining regen.
by Taswegian
Feb 15 2020 6:41pm
Forum: Battery Technology
Topic: 3D Printed Hailong/Reention Style E-Bike Battery Case
Replies: 12
Views: 761

Re: 3D Printed Hailong/Reention Style E-Bike Battery Case

I haven't given much thought to the lock yet. Default option would just be a similar lug extending into a recess in the battery instead of from the battery into the base but I would hope to come up with something more compact. Blutooth is for the smart BMS (long thread in this forum, usually hovers ...
by Taswegian
Feb 11 2020 4:56pm
Forum: Battery Technology
Topic: 3D Printed Hailong/Reention Style E-Bike Battery Case
Replies: 12
Views: 761

Re: 3D Printed Hailong/Reention Style E-Bike Battery Case

I agree, even a material like PETG is quite temperature resistant and easy to print. I really like the idea of having lightweight swappable battery packs, kind of like a drill or an impact gun. I'm going to make them anyways. Most things fail so I don't care if it fails. Its fun to make things anyw...
by Taswegian
Feb 08 2020 12:18pm
Forum: Battery Technology
Topic: 3D Printed Hailong/Reention Style E-Bike Battery Case
Replies: 12
Views: 761

Re: 3D Printed Hailong/Reention Style E-Bike Battery Case

Any of these out there? Removable / Lockable EbIke Battery Case? https://lh3.googleusercontent.com/jjOrqnYqSIITVsSVm98juY4Z_skdZkV9DWYs-ef_IL1bDLNv3hHQ9HeDkbt4L5KXz0U52VG9zyPqotruuqjy2ZpIIgtf7GKDC2we-Wn_ULIN54ocbQlK27Af_aXI_zKd_Hj4sDcVRlNWErEF6r72oWQgikhHJx58dmDWGbyUQwfj37Szg9v5X-zzTA1SZDUtmjD_ZYYh...
by Taswegian
Feb 04 2020 9:25am
Forum: Battery Technology
Topic: BMS question
Replies: 3
Views: 229

Re: BMS question

Note that when using a 16S BMS as a 13S (if supported) its not necessarily the top few wires that are left unconnected. My BMS has a range of 10S to 15S and when used as 10S the connectors excluded are 5,9,10,14,15
by Taswegian
Feb 03 2020 9:50am
Forum: Battery Technology
Topic: Making slotted nickel strips?
Replies: 7
Views: 381

Re: Making slotted nickel strips?

I have made the slots on nickel ribbon with a Dremel using their abrasive disc. DremelDisc1.jpg I once saw a 3D print of a micro table saw using a Dremel with these wheels. I'm going to make one and add a little sliding caddy to make it easy to cut consistent slots. Should also be possible to cut a...
by Taswegian
Nov 07 2019 8:02am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1035
Views: 140510

Re: kWeld - "Next level" DIY battery spot welder

https://i1055.photobucket.com/albums/s515/rkenders/Misc%20Items/pile-gold-bars-17073426.jpg Ahemm... can I get this reward paid out cash instead? 8) 8) After seeing that elephant and pile of poo picture, I'm wondering how that elephant did that in one "squatting". I mean that pile is 1/3rd the size...
by Taswegian
Oct 01 2019 9:54am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1035
Views: 140510

Re: K-weld super cap board experiment with over volting

WARNING: Do this at your own risk and frankly I recommend that you don't!!! WARNING: Please do not do this at all, this is very dangerous and can even lead to permanent injury! These caps can break down violently when being charged beyond their rated voltage! What can legit Maxwell caps handle? [.....
by Taswegian
Jul 29 2019 5:00am
Forum: Battery Technology
Topic: Awesome study / information on NCA battery degradation (Panasonic NCR18650PD)
Replies: 18
Views: 1427

Re: Awesome study / information on NCA battery degradation (Panasonic NCR18650PD)

From this I take the following lessons for my Ebike: I will set my charger end voltage between 4.0 or 4.1 volts and charge whenever I arrive home, less deep discharge is better and with a conservative end voltage the degradation due to storage is not so bad. Only for a big trip I charge it up to 4....
by Taswegian
Jul 25 2019 6:05am
Forum: Battery Technology
Topic: 18650 spot welding -how to- ULTIMATE REPOSITORY
Replies: 759
Views: 171397

Re: 18650 spot welding -how to- ULTIMATE REPOSITORY

Whats the problem with the early K-weld?
I have a relatively recent one and although I've only done a few test welds so far it seems to perform exactly as advertised, ie works great!
by Taswegian
Jul 22 2019 6:41am
Forum: E-Bike Technical
Topic: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers
Replies: 165
Views: 21198

Re: 2018 Torque Arm Tests, Splined Interface Design and Tabbed Washers

Will there be a front wheel GMAC, or is it too crowded to fit this kind of torque arm?
by Taswegian
Jun 26 2019 1:15am
Forum: Battery Technology
Topic: Fantastic BMS And Where To Find Them (?)
Replies: 24
Views: 2068

Re: Fantastic BMS And Where To Find Them (?)

https://www.energusps.com/shop/product/tiny-bms-s516-150a-750a-36 I have several of these, and ran into a number of problems including sloppy support. Biggest problem to date is complete damage of a cell group in a pack out of Nissan Leaf modules due to loss of power to the board - e-mailed them a ...
by Taswegian
Jun 25 2019 1:24am
Forum: Battery Technology
Topic: Fantastic BMS And Where To Find Them (?)
Replies: 24
Views: 2068

Re: Fantastic BMS And Where To Find Them (?)

About 4x the price of a chinese version but given you previous experience & requirements that might be a non issue for you; https://www.energusps.com/shop/product/tiny-bms-s516-150a-750a-36 I haven't used one, but they appear to be well made with top spec parts. Very compact, smallest I've seen with...
by Taswegian
Jun 14 2019 4:46pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1274
Views: 151117

Re: bluetooth BMS?

Could anyone please advise on their approach to soldering the B- & C- wires to these BMS. I have a couple from James at LTT power and the pads for these connections seem very small, there isn't much 'meat' around the hole to solder to. Also, on one side they don't actually even connect to the main a...
by Taswegian
May 29 2019 5:54am
Forum: Battery Technology
Topic: Panny or Sanyo?
Replies: 44
Views: 2176

Re: Panny or Sanyo?

Thanks Matador for taking the time to lay it out so fully and with precise writing, well done, and this does agree with other information on the topic. There are so many variables, and of course shoddy quality, in materials purity or manufacturing QA will override these finer distinctions. So, my c...
by Taswegian
May 28 2019 4:54pm
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 19
Views: 1484

Re: mega copper battery spotwelder

silentflight wrote:
May 28 2019 4:01pm
Just when you wonder if the Sphere is starting to go soft, somebody picks up the reins and goes wholly and appropriately overboard.

Good luck !
Yeah, stay tuned next month for a thread asking where to procure plutonium for a home made reactor powered spot welder.
by Taswegian
May 25 2019 4:50am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1274
Views: 151117

Re: bluetooth BMS?

are there any programmable bluetooth bms that are just 1 cell high? i need to make a flat battery and 7cm is my thickness limit. Do you mean a BMS that fits within the footprint of a single cell, ie 18 x 18 x 65 ? (Edit - or maybe you're asking for longest BMS dimension to be no more than cell leng...
by Taswegian
May 14 2019 2:56am
Forum: Battery Technology
Topic: Clarification on the 20% Rule
Replies: 14
Views: 864

Re: Clarification on the 20% Rule

ahh, so it is also much better to charge it to 50% for overnight storage? i usually charge it to 80% ready for the next morning 80% is fine. Most of the benefit comes from avoiding the top 15%. Below 80% you're into rapidly diminishing returns. 50% is ideal for longer term storage. Vacations, winte...
by Taswegian
May 08 2019 6:02am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1274
Views: 151117

Re: bluetooth BMS?

That's really the job of the charger rather than the BMS. There are sophisticated programmable chargers like the Grin Cycle Satiator that allow you to configure difference charging regimes and switch between them easily. Cheaper option is chargers that have two target charge levels and a physical sw...
by Taswegian
Apr 19 2019 3:50pm
Forum: Battery Technology
Topic: DIY copper/nickel buses for 18650's
Replies: 12
Views: 1058

Re: DIY copper/nickel buses for 18650's

Have you researched the galvanic corrosion issue? Maybe a thin bonding coat of conductive epoxy between, rather than heat. . . Should be a non issue? Nickel & Copper are both very low and very close in anodic index, so neither becomes a preferential site of oxidation/reduction supplying the other.