Search found 2040 matches

by parabellum
Oct 09 2018 8:31pm
Forum: Battery Technology
Topic: Build your own charger
Replies: 53
Views: 2866

Re: Build your own charger

Nice Setup. Thanks. It is just such a nice upgrade, after annoying fan action of previous set-up. Can charge any time, anywhere now. As long as can still get 15A out of it and not cost too much. You can look at HLG-600H. They are not super cheap but I have a pile of broken standard CCCV chargers th...
by parabellum
Oct 06 2018 2:05pm
Forum: Battery Technology
Topic: Build your own charger
Replies: 53
Views: 2866

Re: Build your own charger

Sealed and potted = NOT serviceable. No thanks! And that is how your setup could look like :D 10. This series meets the typical life expectancy of >62,000 hours of operation when Tcase, particularly tc point (or TMP, per DLC), is about 75 °C or less. see .pdf and about 100,000hrs if Tcase is under ...
by parabellum
Aug 22 2018 10:49pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 293
Views: 26973

Re: Suzuki GSX-R e899 K2

Rovii wrote:
Aug 20 2018 1:05am
Well I use the time in between to sattle new top speed records with my second toy :

Nice. Do you have a video someone filming you riding? I just can not understand how it could work in sitting position.
by parabellum
Aug 19 2018 12:32am
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

No one has any doubt that your motor spins and can propulse some kind of vehicle. Unfortunately, graph-vice "Duyunov", in explanation of technology I have seen, is referring to fixed frequency, voltage curves and advantages of "Slavyanka" in this case, where in propulsion paradigm asynchronous motor...
by parabellum
Aug 18 2018 7:00pm
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

First QS72V2000W 15.7kg/12.3kg Second QS48V800W 11kg/8kg In this video you can see the data on the rim of the wheel https://youtu.be/6AJtvGOYHUs These electric motors we compare with our wheel-hub motor 318 diameter. (Hanging on the wall) 20000W 20kg Wait for details I wonder how to compare 2kW (ev...
by parabellum
Aug 15 2018 9:13am
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

d7500 Rated output 7.5W (I think an error, need to write 7.5kW) Max output 10,000W DA-90S Rated power 3 kW Maximum in peak to 20 seconds 9,4 kW Is it possible to compare them? That is why I am asking, those are 2 motors, offered by same supplier, with similar dimensions, same mounting topology, for...
by parabellum
Aug 14 2018 10:59am
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

No. I specified. Under the link, the old data, some of them on the electric motor of a different power. Correct data Rated power 3 kW Maximum in peak to 20 seconds 9,4 kW Max. Peak moment at 350A - 74Nm Voltage 72V (60-85V recommended) Weight 10.5 kg Ok. So how is DA-90S motor better than d7500 BLD...
by parabellum
Aug 14 2018 8:23am
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

Yes. I clarify now - this is the data of a serial or test electric motor. I will write later. Rated power 3kW Power in peak about 9kW Voltage 72V Let me try to organize what you said. 1. Original series produced motor you took as base is 3kW rated, 9kW peak and works on 72V. 2. Slavyanka mod of for...
by parabellum
Aug 13 2018 8:04pm
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

So is this exact same motor from http://www.eastgem.net/da-90.html or is it some other modification?
How much does a matched and programmed kit costs, DA-90S+Kelly KAC7230H?
by parabellum
Aug 13 2018 10:48am
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 64
Views: 3241

Re: Duyunov wheel-hub motor

skazburg wrote:
Aug 12 2018 12:57pm
Friends, if anyone wants to order an electric motor DA90S with a winding "Slavyanka", write to me.
Do you have a specs. sheet for this modded motor?
by parabellum
Aug 01 2018 3:40pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2655
Views: 88898

Re: Wind and Solar vs Coal, Gasoline, Nuclear

My concern is the ER/EI of solar PV in Germany performing at 4:1. Other studies have it no higher than 7 worldwide. If the best we can do for the creation of energy is an ER/EI of 4 (even 7) That is what wiki says, backed by several linked studies: https://en.wikipedia.org/wiki/Energy_returned_on_e...
by parabellum
Aug 01 2018 9:15am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2655
Views: 88898

Re: Wind and Solar vs Coal, Gasoline, Nuclear

If anyone does not think these reserchers are in the ball park can you show us where they went wrong? They probably didn’t, in their paradigm. But, today is 2018, not 2013 (think PV prices evolution for ex.) and it is not Germany everywhere in the world (there are to many far better places in the w...
by parabellum
Jul 28 2018 12:33pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 807
Views: 41138

Re: bluetooth BMS?

jumpjack wrote:
Jul 28 2018 11:48am
I see there are some firmwares around, for BT BMS.
Is there any opensource firmware available for this BMS?
It is even worse, there are same type Bms's that only work with its own tier of software. Open source would be so nice, I already miss some settings.
by parabellum
Jul 25 2018 8:58am
Forum: E-Bike General Discussion
Topic: High Amperage BMS Reccomendation
Replies: 10
Views: 510

Re: High Amperage BMS Reccomendation

jktobin1 I would like to ask you some questions. 1) The project consists of a 20s10p battery pack What cells are you using? 2) continuous discharge of 200A Desired peak current is? For how long, your estimation? 3) Balances cells during discharge and charge Why would you balance during discharge? 4)...
by parabellum
Jul 21 2018 1:25pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 293
Views: 26973

Re: Suzuki GSX-R e899 K2

What will you do with the motor? As-is it's nothing more than a boat anchor, but in the right hands it can be made useful. I think, Rovii is a very gifted and handy man and after a season end can take some time, read through some rewind threads on ES, learn more about Kv, Kt, R phase to phase and f...
by parabellum
Jul 14 2018 1:02am
Forum: E-Bike General Discussion
Topic: Are Scooter LG 36V 4.4AH battery packs good for Ebike?
Replies: 32
Views: 3469

Re: Are Scooter LG 36V 4.4AH battery packs good for Ebike?

all the packs I have, have the BMS on the very top(on the four top cells) I got packs with 3 different BMS boards, mine where samsung 22p with 2 different boards on the side and a board in between. Some packs where crushed, but got refund for. I did not found any info on those LG initially so i wen...
by parabellum
Jul 14 2018 12:38am
Forum: Battery Technology
Topic: Li-ion 4.35V: How much do we lose by charging it at 4.20V?
Replies: 9
Views: 359

Re: Li-ion 4.35V: How much do we lose by charging it at 4.20V?

thunderheart wrote:
Jul 13 2018 7:42pm
Plus, i do each test minimum twice to be sure in the results.
Very good info you are providing about cells, following you on several topics.
Your accent does not appear Russian by the way.
by parabellum
Jul 13 2018 11:36pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2655
Views: 88898

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Overtheroad diesel truck engines and farm tractors are operating at 40% efficiency so this is not that bad considering the truck can stop for a 20 minute fuel up and take on 400 gallons of fuel which is 15,000 kWh. Yes, there are many mental deficiencies to overcome in areas of sufficient infrastru...
by parabellum
Jul 13 2018 3:51pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2655
Views: 88898

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Metal is much more useful than stone for tools. I see a ray of sunlight. So, what about 4-5x energy conversion efficiency of EV to ICE. (think 5 stone hammers to 1 metal hammer) Liquid fuel is ideal for moving things around. No, they are ideal to produce heat, it is what they do moving ICE mainly. ...
by parabellum
Jul 13 2018 2:46pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 2655
Views: 88898

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Fuel outlets will not diminish until after liquid fueled vehicles diminish. The liquid fueled vehicle quickly replaced the horse since they quickly became much more useful for transportation than a horse. Stone age ended not because stones where over. There always will be some use fore stone and fo...
by parabellum
Jul 12 2018 1:18pm
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 76
Views: 9707

Re: Fuse-wire for individual cells, DIY Tesla style

Remember, you have to interrupt <4.2V circuit and only a dozen or 2 of A current capability. This depends on the specifics of the battery pack it's used in. With many parallel cells the fault current could get quite high if a single cell were to develop an internal short. 1) The fusible link will b...
by parabellum
Jul 12 2018 12:06pm
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 76
Views: 9707

Re: Fuse-wire for individual cells, DIY Tesla style

I suspect that the tiny chinese glass fuses would not have a high interrupt capacity because the internal volume of the fuse is quite small Remember, you have to interrupt <4.2V circuit and only a dozen or 2 of A current capability. That is not really a plasma danger level and discussed fuses have ...
by parabellum
Jul 12 2018 9:00am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Suzuki GSX-R e899 K2
Replies: 293
Views: 26973

Re: Suzuki GSX-R e899 K2

and my price limit was 1000€. I like the philosophy and service of Kelly Controls much, much more! So here the story of using a hubmotor in a motorcycle ends for me and I will change now to chain drive! You also can use this hub as mid drive, if you have enough space for. Winding job takes several ...
by parabellum
Jul 11 2018 4:25pm
Forum: Battery Technology
Topic: Fuse-wire for individual cells, DIY Tesla style
Replies: 76
Views: 9707

Re: Fuse-wire for individual cells, DIY Tesla style

Fuse wire and mentioned glass fuses are less then ideal for discussed job. Ideally it should be: 1)low heat conducting material with 2)high current conductivity, 3)confined fusible area and 4)protected fusible area What comes to mind is following fuse design with fine, zink based fusible link http:/...
by parabellum
Jul 11 2018 3:48pm
Forum: Battery Technology
Topic: Lightweight lithium battery for car
Replies: 16
Views: 755

Re: Lightweight lithium battery for car

Turns out most of what I thought was charge current was actually being routed to other systems thru the power block on the + terminal. The problem will be if you have almost discharged battery for some reason. After start, generator will try to push in all Amps it can generate. You can end up with ...