Search found 221 matches

by dominik h
Sep 20 2022 7:33am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

4kw R4875 works now with the right plug.
Giving 3 seconds up to 4,4kw.
by dominik h
Sep 20 2022 5:11am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Looking at my picture 4 hours later gives me the solution, I did not make a series connection , I shorted them. :cry:

Now they are working.
20220920_121547.jpg
20220920_121547.jpg (3.31 MiB) Viewed 94 times
by dominik h
Sep 20 2022 12:41am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Does anyone know why the huawei r4850 do not give any voltage when they are connected in series? If I open the serial DC-output connection they imidiatly give me 53.5V.

I use the Eltek FP2 in series without any problems.
20220920_072746.jpg
20220920_072746.jpg (2.55 MiB) Viewed 112 times
by dominik h
Sep 14 2022 2:09am
Forum: Battery Technology
Topic: ULtra Compact 1800W charger + Eltek programming
Replies: 352
Views: 83326

Re: ULtra Compact 1800W charger + Eltek programming

Permanent setting is implementet in the Flaptpack after a certain Rev number. My knowledge ist that it is only possible to set permanent voltage with Rev 3.0 and above
by dominik h
Sep 14 2022 2:04am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I know about the flatpack 24V but they are to expensive for me (used >over 400€) . Can get the huawei for half the price.
by dominik h
Sep 13 2022 4:29pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Great find. :bigthumb: I will try it not tomorrow. :( I first have to get the right plug, my plugs do not have the option to ad that pin. Have you found the manual for the R4875 Do you know how the R24/4850 is switched between 24V and 48V or is this done via CAN? I'm still looking for a 24V rectifier.
by dominik h
Sep 12 2022 11:41pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Same with my three R4875G1 , got them delivered today.

They act like they are R4850
by dominik h
Sep 04 2022 3:43am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

The Huawei are made to work in paralell. If you do not want to make live changes, you only have to set the offline max voltage on both to your needs. The rest will be done by the psus. If you want to make changes on the fly I think you need two separated CAN Controllers. But i did not test this myse...
by dominik h
Sep 02 2022 3:32pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 462
Views: 39652

Re: Yamaha YZ250F

For the Huawei i use a USB to CAN-BUS converter. Canalyst 2 It is a clone but works ok after downloading the software from the link on the package. But i think every other will do the job. You can also look for the eltek Flatpack 2 110-125 2000W adjustable range from the eltek Homepage is 89,2 - 171...
by dominik h
Aug 31 2022 4:38am
Forum: Battery Technology
Topic: Modular Battery suitcase
Replies: 34
Views: 1135

Re: Modular Battery suitcase

I would paralell them with wires 1,5mm² 10-20cm length (awg 15 to awg 16 about 3-6") this should limit the current to values around 20A and should not burn the wires when the cells are within 0,1V.
by dominik h
Aug 29 2022 2:14pm
Forum: EScooters/EMotorcycles
Topic: Lifepo4 battery needed for qs138 70h v3
Replies: 10
Views: 382

Re: Lifepo4 battery needed for qs138 70h v3

For higher discharge rates lifepo4 look for A123 cells.
Or take Li-NMC power pouch cells they have diacharges rates up to 10C.
by dominik h
Aug 28 2022 2:25pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 462
Views: 39652

Re: Yamaha YZ250F

You could go for a setup with two huawei 48V in series with a 24V huawei. Only problem is that you always have to power on the PSUs before you plug in the batterie, as the PSUs could be damaged through unequal charging of the output caps. Megmeet has also a rectifier with 72V 3kW but they have not e...
by dominik h
Aug 28 2022 1:33pm
Forum: Battery Technology
Topic: Modular Battery suitcase
Replies: 34
Views: 1135

Re: Modular Battery suitcase

I also let the bms equalize my 21S5P (100Ah) scooter battery. It took nearly a week, but was much less work for me than clamping 105 cells to an RC-charger and wait up to an hour for each cell until they are at the same voltage level. I checked the cell with the lowest and the highest voltage level ...
by dominik h
Aug 27 2022 1:58pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 462
Views: 39652

Re: Yamaha YZ250F

Huawei is a simple CAN Adress to set the Voltage and an Adress to set the current you want. But only from 48 to 58,5V when offline limits are used. Don't know how to get more volts out of them. They all only have 63V caps. Except the eltek 48-60V 2kW flatpack2 HE these have 80V caps and can do 72V. ...
by dominik h
Aug 27 2022 8:13am
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 462
Views: 39652

Re: Yamaha YZ250F

What power supply are you using as a charger?
by dominik h
Aug 26 2022 8:41am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

The R4850G2 works down to 30V the fan goes to full speed under 40V. Test were done with 27A and 53V setting. I will get a few R4875 in the next weeks and will test them with the electronic load. I'm still working on a small an powerfull charger for my 21S100Ah Scooter. They will be put in series ein...
by dominik h
Aug 02 2022 2:14pm
Forum: Motor Technology
Topic: Nanjing far driver controllers
Replies: 361
Views: 27261

Re: Nanjing far driver controllers

I could only update the Firmware with an IPhone.
My 3 different android systems where not able to find the file in the directory.
Seems to me like a software bug in the english androud app.
by dominik h
Jul 29 2022 7:41am
Forum: EScooter/EMotorcycle Build Threads
Topic: Regenerative brake control
Replies: 17
Views: 915

Re: Regenerative brake control

viewtopic.php?f=12&t=113543#p1679616
viewtopic.php?f=12&t=113543#p1679616

In the rippy scoot thread a pressure transducer is also used
by dominik h
Jul 23 2022 9:14am
Forum: Motor Technology
Topic: Nanjing far driver controllers
Replies: 361
Views: 27261

Re: Nanjing far driver controllers

... the new challenge will be to slowly increase the power without blowing up the motor How do you know when you reach the limit of the motor? I want to measure the acceleration with a 10Hz GPS system and hope to find out when more current does not produce more tourque and only produces more heat. ...
by dominik h
Jul 22 2022 3:38am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 209
Views: 65563

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

There also exist 24V versions and a versions that can do both 24 and 48V called R24/4850N these can be voltage set via CAN.
by dominik h
Jul 22 2022 3:32am
Forum: Motor Technology
Topic: Nanjing far driver controllers
Replies: 361
Views: 27261

Re: Nanjing far driver controllers

How do you communicate with the controller now, by wire and computer? Right now I just don't. I only have the bluetooth dongle, the controller either comees with a cable or a bluetooth dongle. So basically right now I can't do anything, but at least I can ride the bike with the current settings. I ...
by dominik h
Jul 21 2022 10:47am
Forum: EScooter/EMotorcycle Build Threads
Topic: RIPPY SCOOT
Replies: 74
Views: 5577

Re: RIPPY SCOOT

At 3.0V per cell there is not much energy left in the cells and they drift a lot. Here some pictures from my stationary discharge test from my 21S100AH Li-NMC battery with 83A current. Resistance at the controller including wiring is lower than 17mOhm during this test. BMS discharge cut off was set ...
by dominik h
Jul 15 2022 1:33pm
Forum: EBike General Discussion
Topic: far driver nd72800 vs nd72850
Replies: 19
Views: 968

Re: far driver nd72800 vs nd72850

Both of my Sabvoton 72150 have throttle regen and 3-speed switch.
They also have a motorcycle version. :wink:
by dominik h
Jul 12 2022 3:15pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Yamaha YZ250F
Replies: 462
Views: 39652

Re: Yamaha YZ250F

A few more settings, Follow is interesting. It seems I can only get regen on a button or throttle release. The throttle release seems buggy, sometimes I get a delay when I get back on throttle after throttle release. So that seems pretty much unusable as it is, and that is something I really want :...
by dominik h
Jul 05 2022 2:55pm
Forum: EScooters/EMotorcycles
Topic: sabvoton 72200 unlocked over current error
Replies: 7
Views: 355

Re: sabvoton 72200 overcurrent problem

Had this error once on a 72150 after driving 15 minutes uphill with 10-14kW load. Motor wires were already at 180 degrees celcius when the error was set. My motor was not blocked , the controller only stopped the power and had to be reseted. I did not change the controller setup. I never tried this ...