Search found 18 matches

by Easy_Rider
Jun 10 2019 12:29pm
Forum: Battery Technology
Topic: Which cell for long lasting battery
Replies: 32
Views: 1395

Re: Which cell for long lasting battery

Are your battery cells assembled into plastic cavities, or just connected to eachother with glue?
Do you know, with which materail the cells are welded to eachother? Pure Nickel, or Hilumin?
by Easy_Rider
May 24 2019 12:48am
Forum: Battery Technology
Topic: 14s2p Minicube w/ 21700 batteries
Replies: 5
Views: 369

Re: 14s2p Minicube w/ 21700 batteries

The Samsung 50E are rated at a max discharge rate of 9.8A. The ad is misleading to the novice. Yes the BMS supports a discharge rate of 30A, but the battery only supports a discharge rate of 19.6A (2P) configuration, but I would not run it at more than 10A to expect any usefull lifespan out of it i...
by Easy_Rider
May 24 2019 12:34am
Forum: Battery Technology
Topic: How solar panel impact battery life for ebike?
Replies: 24
Views: 751

Re: How solar panel impact battery life for ebike?

I would not say it is impossible, I would just say it is complicated and might be expensive. You would need between the battery and the solar panel something like this: https://www.amazon.com/GHB-Controller-Intelligent-Temperature-Compensation/dp/B01LZZMDSQ/ref=sr_1_3?__mk_de_DE=%C3%85M%C3%85%C5%BD%...
by Easy_Rider
May 23 2019 8:33am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

I used to be a passionate RC-Freak and gained some experience on Li-polymer at the time, where 18650 could reach maybe 4C the most. :mrgreen: I remember trying to assemble a battery with CGR18650CH for some races...that was really desperating... But in the meanwhile we have battery cells out there, ...
by Easy_Rider
May 23 2019 12:40am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

Are you sure that you agree with Matador ? 😊 Just read carefully his post. 😊 Docware Of course I did and if you read my post, you can see my explanation. I fit my battery to the Motor and controller I use and to the landscape and season I´d like to drive. And as long as I am 80 Kg. battery + motor ...
by Easy_Rider
May 22 2019 2:38pm
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

I agree with you as well Matador! :wink: The reason, why I bought a frog battery, based on the 21700 M50 from LG Chem, is because I use at 48V a motor (Tongsheng TSDZ2) with 250W. On 13S3P I have around 1,80A - 2,20A CDR on every cell...and I ride my bike in the city...and it is really flat (Hannove...
by Easy_Rider
May 22 2019 11:17am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

I think the INR21700-40T is very interesting in small dimensions of batteries like 10S2P, or 10S3P.
I daubt it, if the 50E, or M50 will have more Wh at this configuration on 250W-350W motors?!
by Easy_Rider
May 20 2019 1:05am
Forum: Battery Technology
Topic: Powerful inside-frame battery
Replies: 15
Views: 701

Re: Powerful inside-frame battery

Hey-o! I was just offered a Myatu fatbike for next to nothing, however I was informed the battery had gone bad. I've been scouring the internet for a new one, finding mostly rack- and frame type batteries. I humbly ask for your help to figure out the following: I am not surprised you were offered t...
by Easy_Rider
May 19 2019 5:04am
Forum: Battery Technology
Topic: Small 36V battery recommendations
Replies: 7
Views: 428

Re: Small 36V battery recommendations

Found a very small one here: https://www.ebay.de/itm/ENERpower-Softpack-Akku-Li-Ion-36V-10S2P-30Q-6Ah-Pedelec-Range-Extender-5x4-DC/264115160058?hash=item3d7e7d83fa:g:HsAAAOSw6eRcLO-q Assembled with INR18650-30Q And here is a 10S1P with INR21700-30T to be able to carry according to the manufacturere...
by Easy_Rider
May 17 2019 7:01am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

I don´t know, how the INR21700-50E are doing, I guess the same like the LG INR21700 M50?
But if you are into life-cycle, I guess the INR21700-40T will last for longer time. The discharge current would not harm them at all, and they are better on fast charging according to the specification of SDI.
by Easy_Rider
May 17 2019 12:28am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

Many people read and think, wow this battery cell is used by Tesla, must be good also for my eBike... So if you wish to drive with 7104 cells battery with over 80 kWh you can go for that :mrgreen: , otherwise a battery for an eBike has completly other Challenges. It must have enough power (Discharge...
by Easy_Rider
May 16 2019 2:06pm
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

Samsung claims 2k cycles from the 33J @ 4.1 -->3v . Is that total bull? https://www.imrbatteries.com/samsung-33j-21700-3270mah-3-2a-battery/ On paper they seem to be touting it as 29E's big brother. https://secondlifestorage.com/t-Samsung-33J-a-21700-Li-ion-battery-designed-for-Tesla Usually those ...
by Easy_Rider
May 16 2019 11:02am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

A123 26650 are LFP Totally different chemistry, fantastic longevity if treated well, should use a setpoint-adjustable charger and BMS. and great discharge rate when needed. But less energy dense, what is the use case? 26650 in a little frog? with 48V? With LiFePo4? you need 15S so maybe enough plac...
by Easy_Rider
May 16 2019 10:18am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

you are not going to get any decent cycle life on any of the 2xx cell form factors. if you want hard cycle life you need to dial it back to 18650 and stay under 3000mAh. What do you understand with "decent"? :mrgreen: My first battery was based on Sony Konion US18650V3 and it last at least 6 years ...
by Easy_Rider
May 16 2019 9:59am
Forum: Battery Technology
Topic: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E
Replies: 65
Views: 2522

Re: Panasonic/Sanyo NCR20700B vs Samsung INR21700-50E

In 14S5P you have on 20A discharge exactly 4A peak current on every battery. Both NCR20700B, INR21700-50E, or even LG Chem INR21700 M50 (which I have in my battery) are suitable. The 20A Charging current is too high for life cycle. I would not exceed, if I were you, the 0.3C for the battery. Especia...
by Easy_Rider
May 14 2019 1:49am
Forum: E-Bike General Discussion
Topic: Battery situation in EU
Replies: 12
Views: 797

Re: Battery situation in EU

Finally decided to move to a little frog case due to problems in space and found this thread. I am looking for a 48V with the highest capacity I can get and found those 2, assembled with 21700 cells: With 21700 from Samsung SDI: https://enerprof.de/shop/batteries/ebike-and-pedelec-batteries/48v-li-i...
by Easy_Rider
Apr 14 2019 4:55am
Forum: Battery Technology
Topic: 21700 Battery cell with High-Capacity
Replies: 3
Views: 367

Re: 21700 Battery cell with High-Capacity

I´d like to assemble a 10S4P with 21700. It saves me 2 parallels in comparison to 18650. I am aware, that the 21700 have lower C rate in this capacity, but on 250 Watt motor, I don´t see any problem. I was just wondering if any one around here gained any experience on those types of batteries?! Seco...
by Easy_Rider
Apr 13 2019 10:29am
Forum: Battery Technology
Topic: 21700 Battery cell with High-Capacity
Replies: 3
Views: 367

21700 Battery cell with High-Capacity

I would like to make some new experiments with 21700 batteries. I´d like to have at least 20Ah in 36V (10S). Found the 50E at nkon.nl here: https://www.nkon.nl/samsung-inr21700-50e.html Found a new battery from LG Chem at enerprof.de: https://enerprof.de/shop/batteries/li-ion-batterie-cells/samsung-...