Search found 58 matches

by la8rat
Jul 27 2019 11:33am
Forum: Battery Technology
Topic: Splitting up a 14s pack to balance
Replies: 14
Views: 302

Re: Splitting up a 14s pack to balance

Got all my charge leads soldiered on today. Im going to use an old 48v 2 amp charger to get the pack most of the way to 4.1 and then use balance charger to top off.
by la8rat
Jul 26 2019 9:58pm
Forum: Battery Technology
Topic: Splitting up a 14s pack to balance
Replies: 14
Views: 302

Re: Splitting up a 14s pack to balance

My amp discharge rate is set at 10 i may up that to 11.

My pack is only 4p so 4 amp charging is as high as id ever want to go.

Id rather have a slower charge and longer pack cycle life.
by la8rat
Jul 26 2019 1:45pm
Forum: Battery Technology
Topic: Splitting up a 14s pack to balance
Replies: 14
Views: 302

Re: Splitting up a 14s pack to balance

If the two balance chargers are coming off the same supply, you can't use them at the same time unless you break the series connection between the pack sections. If you had two separate supplies running separate balance chargers, then you could run them at the same time. Ok cheers. I would probably...
by la8rat
Jul 26 2019 1:09pm
Forum: Battery Technology
Topic: Splitting up a 14s pack to balance
Replies: 14
Views: 302

Re: Splitting up a 14s pack to balance

That option has gone as the pack is built. Plus my charger is dual 6s.
My bulk 52v charger is ok i guess. But i wont be using a bms. The cells are brand new Samsung 35E's

Im only charging up to 4.1 and discharging down to 2.8 for cell life extension
by la8rat
Jul 26 2019 11:15am
Forum: Battery Technology
Topic: Splitting up a 14s pack to balance
Replies: 14
Views: 302

Re: Splitting up a 14s pack to balance

Should work except you have to do one section at a time. You can't do more than one at time unless the balance chargers are isolated. Cheers for the prompt reply. Would charging the two 5 packs at each end together be ok leaving the 4s in the middle to charge on its own after? My charger is the ..H...
by la8rat
Jul 26 2019 9:23am
Forum: Battery Technology
Topic: Splitting up a 14s pack to balance
Replies: 14
Views: 302

Splitting up a 14s pack to balance

Hi. Just got my first ever battery welded together. Went very easy with my diy car battery welder. Ive added 3 balance leads 5s 4s and 5s to make the 14s. Is there any technical reason why i cant and 4 charge leads at cell 1 negative, the join between 5 and 6, the join between 9 and 10 and cell 14 p...
by la8rat
May 31 2019 3:06am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5574
Views: 449762

Re: New "TSDZ2 Torque Sensor Central Motor"

Do these chainrings fit? I want to go 36t from the stock 42 https://www.ebay.com/itm/Road-Bicycle-Folding-Bike-Crankset-110BCD-Aluminum-Chainring-Chain-Wheel-Surpris/233220779618?hash=item364d0aae62:g:-7QAAOSwJoxc0oTz yes it will fit i swapped mine out for a 36 chain ring as well, on 26 inch wheels...
by la8rat
May 30 2019 6:16am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 5574
Views: 449762

Re: New "TSDZ2 Torque Sensor Central Motor"

Do these chainrings fit? I want to go 36t from the stock 42 https://www.ebay.com/itm/Road-Bicycle-Folding-Bike-Crankset-110BCD-Aluminum-Chainring-Chain-Wheel-Surpris/233220779618?hash=item364d0aae62:g:-7QAAOSwJoxc0oTz yes it will fit i swapped mine out for a 36 chain ring as well, on 26 inch wheels...
by la8rat
May 17 2019 11:46pm
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 3337
Views: 154750

Re: TSDZ2 mid drive -- Flexible OpenSource fiwermware for TongSheng TSDZ2 mid drive motor

Well done with helping her.. glad shes ok now must have been very long night for her.
:bigthumb:
by la8rat
May 06 2019 4:36am
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 3337
Views: 154750

Re: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor

Hi! I read that with the tsdz2 engine, if the maximum pedal cadence is low, a 36v system can be driven with a 48v battery. Can someone help you do exactly how to do this WITHOUT using vlcd5 and kt lcd3 displays, only with the help of (for example) st-link reprogramming? I haven't bought a kit yet. ...
by la8rat
Apr 25 2019 1:08pm
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

Postmans been busy today. Cells have arrived so has my 25mm 0.15 nickle and my solid state relay to complete my welder.
Hopefully ill get an early finish tomorrow and be able to spend the weekend productively.
by la8rat
Apr 24 2019 10:25am
Forum: Motor Technology
Topic: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor
Replies: 3337
Views: 154750

Re: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor

ive been wondering about this for a while now and still no closer to finding the answer. given that i can select watts and amps limit in the settings and i know my battery voltage lets say its a freshly charged 48v battery putting out around 52v if i set the watts limit to 600 and the amps limit to ...
by la8rat
Apr 23 2019 3:19pm
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

Image
by la8rat
Apr 23 2019 3:03pm
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

Is better to charge all cells to same voltage. Like put cell in a long parallel string and charge 2 the same voltage. If new should all be very close. But some vendors mix batches. Nice to have a rc charger. Hi 999zip999 Yes ive been looking into how im going to charge this and charge all the cells...
by la8rat
Apr 21 2019 3:04am
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

Ok my cells and nickel should be here in a few days. Also waiting on my ssr relay to arrive then i can finish my welder http://i36.photobucket.com/albums/e29/la8rat1/ebike/20190420_125744_zps7lpr8hv4.jpg http://i36.photobucket.com/albums/e29/la8rat1/ebike/20190420_115647_zps0quqri57.jpg I know peopl...
by la8rat
Apr 19 2019 1:14am
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

When it comes to the actual matching up of the 5p packs. Ive been dreading having to fully charge all 70 cells 2 at a time on my nightcore 18650 charger. Just a thought i had this morning. Ill already have a 14s bms, can i make a 14 cell battery holder and create a temporary 1p14s pack to utilize th...
by la8rat
Apr 19 2019 12:37am
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

Fechter I love the simplicity of your build p+s out of single nickle sheet. Would the fiberglass tape not stop my pack from fitting together neatly given that its not going to be in straight lines as yours is but rather the hexagonal pattern? Point taken about the paper positive end insulator, i sha...
by la8rat
Apr 18 2019 1:50pm
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

Thanks. Ill look again.

No space or ventilation issues. I have a sort of workshop come garage :) id only need it to be waterproof if someone nicked my roof .

You rack stack chargers? Is this linked to all the testing you do?
by la8rat
Apr 17 2019 5:34pm
Forum: Battery Technology
Topic: New batt for TSDZ2 /cold climate/BMS compatibility questions
Replies: 12
Views: 392

Re: New batt for TSDZ2 /cold climate/BMS compatibility questions

Hi Cant coment on the other batteries but im looking at building a pack from Samsung 35e cells. They do look good. Another member on here told me that unless you charge them at 1amp your recharging cycles will take a big hit. Can charge at 2 amps but very bad for the life of the cells. Hope that hel...
by la8rat
Apr 17 2019 4:34pm
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

About the HLG The thing i found was a power source for led lighting fixed at 5.something amps and said nothing about possible adjustments. I did see the luna charger and a post somewhere from a guy complaining they were hard to get hold of. The reply was to use a 60v 5amp lab power supply. Which do ...
by la8rat
Apr 17 2019 6:23am
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

thanks i didnt realise the chargers had pots inside them DOH.. will there be a current pot as well so i can dorm the amps down from 2 to 1?

ill have a look at that hlg charger as well.

i appreciate the the help :bigthumb:
by la8rat
Apr 17 2019 2:44am
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

:thumb: Ok cheers for that flippy. Looking at the data sheet it seems to agree with what you are saying. The bike is purley a leisure bike, no big daily commutes so i could probably live with a poor duty life but i would need a charger that i have more control over. Given my needs could you recommen...
by la8rat
Apr 16 2019 8:36pm
Forum: Battery Technology
Topic: building my first battery
Replies: 28
Views: 1227

Re: building my first battery

My other choice was the lg mj1 as favoured by luna batteries. But it gets bad reviews. The e35 did ok in this test but has low max charge current.
Sanyo was best but a fair bit more expensive.

[youtube]https://youtu.be/fJDuKyXfrQY[/youtube]