Search found 486 matches

by Cephalotus
Jan 18 2021 1:10pm
Forum: Battery Technology
Topic: The Cycle Satiator, universal charger for the enthusiasts
Replies: 839
Views: 151548

Re: The Cycle Satiator, universal charger for the enthusiasts

Hello, I would like it very much if the Cycle Satiator could also evaluate a "temperature signal" (10k NTC) from a lithium-ion battery in the future. On the one hand, I would find such a temperature display interesting, but it is also a safety feature to be able to reduce the charging curr...
by Cephalotus
Jun 28 2020 8:34am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

..., so if any generalization from me then it is this one. "Use HP cell only in apps where you need high continuous discharge rate like 3C or more, if your averege is well below 1C with short peaks, which is the case of the most traction apps, then use HE cells". OR if you want to charge ...
by Cephalotus
Jun 28 2020 7:43am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

VTC6 is definitely NMC, I don't think the LG cells are NCA either. There is way to much wrong information around, so it is very difficult to know. Actually VTC-6 is a NCA cell, while HG2 is (seems to be) a 811 NMC cell, both in combination with a C+Si anode, as spectroscopic analysis shows: https:/...
by Cephalotus
Jun 24 2020 9:32am
Forum: Battery Technology
Topic: Tesla battery day announcement
Replies: 48
Views: 1724

Re: Tesla battery day announcement

Maybe i should have said, “who needs a car battery that lasts 15+ years”... ? Unless all other components on the car are also going to be reliable for 15+ yrs,...its not a big advantage. That's the cool thing about BEV. Nothing inside that brakes... Of course I woul like a car that last 30 years or...
by Cephalotus
Jun 16 2020 5:09am
Forum: EBike Build Threads
Topic: BionX display using Bluetooth
Replies: 4
Views: 321

Re: BionX display using Bluetooth

The BionX DS3 display is just a dumb display. No information is stored there. (it's different with the BionX Gen 2 console/display) Use the standard firmware 4.0 or the firmware 4.1 that includes the debug screen and that's it. No need to "program" anything if the DS3 display does have a f...
by Cephalotus
Jun 14 2020 4:44pm
Forum: EV Business World
Topic: EV charging prices in Europe increase 500%
Replies: 29
Views: 4412

Re: EV charging prices in Europe increase 500%

, if you want to charge for cheap your own solar system is helpful with charging costs for solar electricity at 9ct/kWh. But, every kWh you divert to charge your EV is a kWh you do not have for use in the house !..so you would have to replace it with a grid supplied kWh at market prices. Effectivel...
by Cephalotus
Jun 13 2020 2:50pm
Forum: EV Business World
Topic: GM retreating into its shell ?
Replies: 36
Views: 3093

Re: GM retreating into its shell ?

Punx0r wrote:
Feb 18 2020 1:50pm
Europe missed out on the Bolt because of GM pulling out of Opel/Vauxhall :(
It's called Opel Ampera-E over here. It's a quite good car.

This (Bolt, Ampera-E) cars electric drive train and battery are made by LG Chem anyway, so only the "shell" is not made in Korea.
by Cephalotus
Jun 13 2020 2:44pm
Forum: EV Business World
Topic: EV charging prices in Europe increase 500%
Replies: 29
Views: 4412

Re: EV charging prices in Europe increase 500%

79ct/kWh is the maximum price. You can use other tariffs to use the Ionity system with prices around 30-40ct/kWh, which is not so far away from typical household tarifs and okay for occasional(!) super quick charging. Super fast chargers are not meant for everyday charging if you have other options ...
by Cephalotus
May 26 2020 4:02am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

Very good and very helpful.

Thank you very much!
by Cephalotus
May 24 2020 1:15pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

Hey,

very cool. Thank you.

Do you have cycle 1 vs cycle 700 charts for capacity and Ri for the HG2 cells?
by Cephalotus
May 15 2020 6:15am
Forum: Battery Technology
Topic: Best Li-ion cell model for ebike pack?
Replies: 16
Views: 978

Re: Best Li-ion cell model for ebike pack?

Almost all lage battery packs built with those cells (edit: 30Q) have failed in the pedelecforum.de, as users have reported over here. There is no possibility to repair those packs, the cells fail one after one. Only very few people report no issues. Maybe this 30Q cell was never intended to be used...
by Cephalotus
May 14 2020 9:51am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

Yes it would be good to have another cylce test, with lets say: 5A for LG M36 and MJ1 5-10A for 29E7 and M29 10-15A for HG2 and VTC6 with 2A charge current or so That would be way closer to how the cells usually being used in real world. Typically the battery in an electric bike should/will last fo...
by Cephalotus
Apr 29 2020 3:58am
Forum: EBike General Discussion
Topic: One stop for solar charging ebike info?
Replies: 47
Views: 1897

Re: One stop for solar charging ebike info?

I do recommend "semiflexible" panels wit Sunpower cells. Use moduls with PTFE coating, NOT PET coating. Do NOT treat them as semiflexible panels, they need a very riged surface to mount them. If you let them flex the cells will brake and output power will degrade quicky. Do NOT use high vo...
by Cephalotus
Apr 15 2020 9:42am
Forum: Battery Technology
Topic: Im going RC LiPo - General advice / BMS / Charger (also Build Thread now)
Replies: 35
Views: 1503

Re: Im going RC LiPo - General advice / BMS / Charger

That's my point. 1. Don't use cheap cells, especially do not use cheap cells that are optimized for anything but safety. 2. If you build a battery pack build it as safe as possible. 3. Do not abuse it 4. If it catches fire you better have it in a place where fire and smoke are contained. This is qui...
by Cephalotus
Apr 15 2020 8:32am
Forum: Battery Technology
Topic: Im going RC LiPo - General advice / BMS / Charger (also Build Thread now)
Replies: 35
Views: 1503

Re: Im going RC LiPo - General advice / BMS / Charger

i was thinking more along the lines of this https://youtu.be/Rv_3vwSZmzA?t=51 Useless, too: https://www.youtube.com/watch?v=WR-Rw0PLgpA Every one of us carries a lipo pack in their pocket next to their balls, relying on BMS only. No, this is not a LiPo pack, it is a single cell with voltage and tem...
by Cephalotus
Apr 15 2020 7:56am
Forum: Battery Technology
Topic: Im going RC LiPo - General advice / BMS / Charger (also Build Thread now)
Replies: 35
Views: 1503

Re: Im going RC LiPo - General advice / BMS / Charger

I'll put it in a lipo safe. I know many people are afraid of rc lipo. I belive risk is greatly minimised when the pack is monitored closely. Thats why I'm asking for BMS/Charger recommendations Lipo safe? somthing like that? https://www.youtube.com/watch?v=qQldY7fKn5o Does not even work for small b...
by Cephalotus
Apr 15 2020 4:10am
Forum: Battery Technology
Topic: Im going RC LiPo - General advice / BMS / Charger (also Build Thread now)
Replies: 35
Views: 1503

Re: Im going RC LiPo - General advice / BMS / Charger

You will need a very good fire insurance and this will propably cost much more in the end as the cheap cells.

If just 1 large LiPo pack out of 1000 burns down a house it is a bad idea from the economic point.
by Cephalotus
Apr 15 2020 3:44am
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 53183

Re: Around the world on a solar ebike

Hotspots in modules with cracked cells... IR: 50W_Sunpowerzellen_semiflexibel_b.jpg Thermo when shorted, not maximum sun (rotate picture): lensun_quality_16098M050004005_verybad.jpg It is not so bad under MPP, maybe +20K for the worst cell, but I can't find the picture... So under bad conditions bad...
by Cephalotus
Apr 15 2020 3:17am
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 53183

Re: Around the world on a solar ebike

Hi, good that you have not been caught "somewhere" on the road. Closing of borders did happen very fast and you probably would have lost your bike. very interesting. The F717 is a good and cheap chose. I fail to understand why other solar ebikers do not test their modules. The general know...
by Cephalotus
Apr 13 2020 7:51am
Forum: EBike Build Threads
Topic: Around the world on a solar ebike
Replies: 326
Views: 53183

Re: Around the world on a solar ebike

Hi there,

U assume that Covid-19 destroyed your trip so far :-(

Have you already been on the road?

Any news on the technology of your solar bike?
by Cephalotus
Apr 13 2020 7:33am
Forum: EBike Build Threads
Topic: Bulls green Mover E45 Conversion
Replies: 5
Views: 1327

Re: Bulls green Mover E45 Conversion

If you are able to understand German you might find that E45 conversion interesting: https://www.pedelecforum.de/forum/index.php?threads/umbau-greenmover-e45-2012-auf-crystalyte-hs4080-ebs-freak.60817/ Pictures do start here: https://www.pedelecforum.de/forum/index.php?threads/umbau-greenmover-e45-2...
by Cephalotus
Apr 13 2020 6:13am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

is that right, do you think? is it the same with the usual e-bike batteries? (car) Lithium-ion battery degradation over time Temperature 40% charge 100% charge 0 °C (32 °F) 40% charge: 2% loss after 1 year 100% charge: 6% loss after 1 year 25 °C (77 °F) 40% charge: 4% loss after 1 year 100% charge:...
by Cephalotus
Apr 12 2020 4:19pm
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

Moreover, voltage of fully charged 30Q No3 is falling quite fast, also had some strange discrepancy during after 700 cycles SOC measurement. It seems to me that Cephalotus´s (and SamRich´s) remarks on 30Q bad reputation are based on true facts: https://endless-sphere.com/forums/viewtopic.php?f=14&a...
by Cephalotus
Dec 20 2019 5:01pm
Forum: EBike Technical
Topic: BionX and phase runner and gauge sensor?
Replies: 2
Views: 547

BionX and phase runner and gauge sensor?

Hello @justin_le and others, I watched your Youtube video using an old BioX motor with a phase runner: https://youtu.be/Wc8OJtFRUng 1st question: Do you have any idea if it would be possible to use that 350Ohm gauge sensor on the bionX axcle to make a Pedelec conform e-bike with a BionX hub motor an...
by Cephalotus
Dec 12 2019 5:22am
Forum: Battery Technology
Topic: Li-ion cells cycle ageing
Replies: 514
Views: 58339

Re: Li-ion cells cycle ageing

It takes about 11 weeks to do 500 cycles. My intention is to finish testing at latest 700 cycles. I suppose for most of community will be 700 cycles data informative enough and testing another cells will be more interesting. Moreover, we haven´t enough time frame for long term testing. It is your t...