Search found 36 matches

by LuboN
Jul 10 2019 3:27am
Forum: Battery Technology
Topic: Upgrading a DPV Battery
Replies: 8
Views: 405

Re: Upgrading a DPV Battery

Wh is calculated Ah x Voltage. Real life Ah would be little lower value, let us say 3,3Ah. 3,3x13=42,9Ah x 25,2V = 1081Wh. How much current does it consume during dive or what is the wattage of the motor? This is important before making cell choice.
by LuboN
Mar 14 2019 6:12am
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 238
Views: 17274

Re: AliExpress battery pack unboxing

There are few installing 20kW controller and 120A BMS for low power scooter :)
by LuboN
Mar 13 2019 7:40pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 238
Views: 17274

Re: AliExpress battery pack unboxing

Reading the thread made me think this is going to be high power one...
by LuboN
Mar 13 2019 12:24pm
Forum: Battery Technology
Topic: AliExpress battery pack unboxing (for my eZuma project)
Replies: 238
Views: 17274

Re: AliExpress battery pack unboxing

No effort will help with the obvious - improper cells for this job... So much money and effort and so short will it last...
by LuboN
Oct 27 2018 4:10am
Forum: Battery Technology
Topic: RC lipo to replace 24V sla in ups?
Replies: 20
Views: 1822

Re: RC lipo to replace 24V sla in ups?

Placing the batteries outside UPS housing is a good idea (for any type batteries). Electronics inside UPS constantly warms up one side of the battery...
by LuboN
Oct 26 2018 4:28pm
Forum: Battery Technology
Topic: Basic BMS question-no separate charge/load terminals?
Replies: 2
Views: 610

Re: Basic BMS question-no separate charge/load terminals?

BMS will loose its function if charge/load paralelled. The diodes would work. The point is charge port can only block charging and load port can only block discharging. BMS with common charge/discharge port would be best solution.
by LuboN
Oct 26 2018 4:21pm
Forum: Battery Technology
Topic: 36V Battery bms question
Replies: 2
Views: 361

Re: 36V Battery bms question

8,5Ah is capacity. BMS is rated for current. Chose the BMS according to how many amps are You going to draw from Your battery.
by LuboN
Oct 26 2018 4:13pm
Forum: Battery Technology
Topic: Help BMS connections
Replies: 5
Views: 596

Re: Help BMS connections

Battery plus goes directly to charger and load. You only connect B- (battery minus), C- (charger minus) and P- (power-load minus) to the board. BMS is getting plus from the balance wires. They should be chcecked twice and connected last.
by LuboN
Oct 26 2018 4:01pm
Forum: Battery Technology
Topic: A solution to charging Li-ion in winter freezing weather: Testing an outdoor temperature-controlled charging system.
Replies: 7
Views: 674

Re: A solution to charging Li-ion in freezing weather: Testing an outdoor temperature-controlled charging system.

If the battery is frozen, it will take some time to warm up to its core. Because You don´t have temperature sensor inside the battery, the easiest way to sort this out is to delay the charging after the temperature inside the chamber reaches "warm enough". The delay should be longer if the initial t...
by LuboN
Oct 26 2018 3:51pm
Forum: Battery Technology
Topic: Parallel protection 18650 pack
Replies: 6
Views: 621

Re: Parallel protection 18650 pack

Either fuse each cell or don´t bother at all... It is there to prevent parallel cells discharge to damaged (shorted) cell in the group.
by LuboN
Oct 26 2018 3:44pm
Forum: Battery Technology
Topic: 14s3p Battery Build <how's this look?>
Replies: 1
Views: 306

Re: 14s3p Battery Build <how's this look?>

This battery is definitely underrated for use in 1000W system. What controller are You going to use? How many amps would it draw?
Systems with 1000W DD are often set up to 30A. If Your battery should live any longer use it at 10-15A max.
by LuboN
Oct 18 2018 12:32pm
Forum: Items for Sale - New
Topic: [SOLD] Sabvoton (MQCON) SVMC72150 controller
Replies: 5
Views: 837

Re: Sabvoton (MQCON) SVMC72150 controller

I understand... I heard that there are different versions of sabvoton controllers...
Does this one have variable regen?
by LuboN
Oct 18 2018 10:13am
Forum: Items for Sale - New
Topic: [SOLD] Sabvoton (MQCON) SVMC72150 controller
Replies: 5
Views: 837

Re: Sabvoton (MQCON) SVMC72150 controller

What does the bench test reveal? Have You used another controller?
by LuboN
Oct 04 2018 4:42pm
Forum: Items for Sale - New
Topic: CHEAP NEW ORIGINAL CELLS LI-ION 18650
Replies: 790
Views: 204014

Re: CHEAP NEW ORIGINAL CELLS LI-ION 18650

Hi Tumich,
what conversion rate do You use for EUR price calculation? (Would be really nice to have prices in both USD/EUR in Your firs post...)
by LuboN
Mar 07 2018 11:33am
Forum: General Discussion
Topic: Help needed building dummy load device
Replies: 66
Views: 4414

Re: Help needed building dummy load device

I would clamp it with some piece of wood... If any good maybe change to aluminum piece later... Or clamp it between two water cooled heatsinks - the best option :-)
Don´t forget heatsink compound...
by LuboN
Mar 07 2018 6:07am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 970
Views: 117461

Re: kWeld - "Next level" DIY battery spot welder

Today I have received EC8 connectors with housings, rated for 180A continuous it looks like great candidate to upgrade XT-90. It also accepts thick cables up to 7mm diameter.
by LuboN
Mar 17 2017 4:45am
Forum: Items for Sale - New
Topic: Ferrofluid APG1110 - Ultimate Cooling for your Hubbie
Replies: 54
Views: 8021

Re: Ferrofluid APG1110 - Ultimate Cooling for your Hubbie

I can confirm the package arrived OK, thank You Merlin!
by LuboN
Mar 06 2017 6:03am
Forum: Items for Sale - New
Topic: Ferrofluid APG1110 - Ultimate Cooling for your Hubbie
Replies: 54
Views: 8021

Re: Ferrofluid APG1110 - Ultimate Cooling for your Hubbie

Merlin, did You get my PM? I am becoming a bit nervous, it is 2 weeks now...
by LuboN
Feb 19 2017 4:48pm
Forum: Items for Sale - New
Topic: Ferrofluid APG1110 - Ultimate Cooling for your Hubbie
Replies: 54
Views: 8021

Re: Ferrofluid APG1110 - Ultimate Cooling for your Hubbie

Hi, I would like to have 30ml please... Is it on stock?
by LuboN
Feb 19 2017 11:21am
Forum: Motor Technology
Topic: How far can I push 6xTO220 controller
Replies: 10
Views: 1278

Re: How far can I push 6xTO220 controller

Yes, there are separate wires soldered parallel to + and - (not visible on photo). I will add a connector (XT60) to connect it to capacitors outside the housing. This way the wires could be short but there will be no problem with disassembling.
by LuboN
Feb 19 2017 6:31am
Forum: Motor Technology
Topic: How far can I push 6xTO220 controller
Replies: 10
Views: 1278

Re: How far can I push 6xTO220 controller

Would like to add some info about the controller I modified. Last year (2016) I was beating the controller all the time, and with its power my riding style changed and I was often riding "motocross" style... And it still works fine! Recently I am modifying next one for my new e-bike, and this time I...
by LuboN
Jan 12 2016 6:27am
Forum: E-Bike Technical
Topic: Regen braking with S12SN controller
Replies: 10
Views: 1948

Re: Regen braking with S12SN controller

fellow, Your mosfet suggestion is great, I even did not know such transistor existed. The only drawback is its price, but the parameters are superb.
by LuboN
Jan 12 2016 6:24am
Forum: E-Bike Technical
Topic: Regen braking with S12SN controller
Replies: 10
Views: 1948

Re: Regen braking with S12SN controller

Lancer_IV, thanks for photos, is there any chance You could test the controller if the E-ABS works in variable mode? I think if yes it could be done with something giving throttle like signal to the input.
by LuboN
Jan 10 2016 7:13pm
Forum: E-Bike Technical
Topic: Regen braking with S12SN controller
Replies: 10
Views: 1948

Re: Regen braking with S12SN controller

Lancer_IV, thank You very much for the information, do You remember what settings it has from factory? I would like to use it without the lcd so I would not be able to set it through it, I have developed something like cycle analyst for myself to do the measurements. Now I am riding 14s/10Ah with Ma...