What controller is this and what is the max voltage and wattage?

[Hexar]

Hi Guys,
I bought a used scooter today, and it comes with a "unknown" motor controller and a LCD display. The label on the controller is washed out and there is no label on any of the wires, so I am quite at lost on what it is and its specs.

It is quite small and light, with a dimension of 88x52x30mm (not measuring the screw heads). I took one side cover off and found it has 6 MOSFETs, and the outer most one read RU6888r (I assume the other 5 are the same), and the big capacitor (blue in the center in the pic) is rated 63V 680uf, and I can read one more smaller cap rated at 100V (the brown one on the right in the pic).

The LCD comes with it is CD-S886, with a throttle thumb switch.

The previous owner also cut/resolderred/modified some of the plugs/wires to fit the scooter, this includes the power wires, the motor phase wires, and the motor hall sensor wires.

I think I can recognize most if not all the plugs, I am not sure about the PAS and the throttle plug, as the LCD has a throttle switch. The LCD itself has a 5 wire plug.

I would like to know if this is rated at 36V or 48V? Can I assume it is only 250W? The battery that comes with the controller is 12s (at only 12 cells, so probably only 4Ah?), I guess it is 43.2V already, but not quite 48V.

Thanks!
HH

 

[slaphappygamer]

6 mosfet controllers seem to max at 20-25amps. The continuous amp rating would be about half that. The 63v capacitors indicate that a 48v battery would be its max. A 12s battery seems like the way to go. Just not sure what the low voltage cutoff would be. 30-32v?

 

[amberwolf]

What is the scooter model and brand? Often you can get info about it as a whole when you can't get info on the separate parts. Doesn't help with the controller if it's aftermarket, but could tell you what the rest was originally.

12s of which chemistry?

If they are LiFePO4, that's a "36v" battery (~43v full, about 38v nominal, about 33v empty).
Other chemistries will have different voltage ranges.

And are they actually 12 in series, or multiple parallel sets of some other series number?

The controllers' max limit for components doesn't tell you if it has an HVC that turns it off above a certain voltage, or what the LVC is that turns it off below a certain votlage. Those you have to determine experimentally since the label appears unreadable.

Best guess, if the system was working, is it is a 36v controller, or a 36v-48v autosetting type (depends on the voltage at powerup which one it sets itself to).

A quick google of your LCD model

CD-S886 - Google Search

gives a number of controller/LCD kit results, such as this one

https://www.aliexpress.com/i/3256802160076784.html

that comes in several voltage types, from 24v 250w up to 48v 500w, but all are about 10A current limit to get that power level. (in the typical range for 6FET controllers). The "undercurrent" they list is actually LVC. There is also a wiring diagram there you could see if it matches how yours is connected.

 

[Hexar]

6 mosfet controllers seem to max at 20-25amps. The continuous amp rating would be about half that. The 63v capacitors indicate that a 48v battery would be its max. A 12s battery seems like the way to go. Just not sure what the low voltage cutoff would be. 30-32v?

Thanks slaphappygamer! if 10amps continuous, then 350W I am guessing?

 

[Hexar]

What is the scooter model and brand? Often you can get info about it as a whole when you can't get info on the separate parts. Doesn't help with the controller if it's aftermarket, but could tell you what the rest was originally.

12s of which chemistry?

If they are LiFePO4, that's a "36v" battery (~43v full, about 38v nominal, about 33v empty).
Other chemistries will have different voltage ranges.

And are they actually 12 in series, or multiple parallel sets of some other series number?

The controllers' max limit for components doesn't tell you if it has an HVC that turns it off above a certain voltage, or what the LVC is that turns it off below a certain votlage. Those you have to determine experimentally since the label appears unreadable.

Best guess, if the system was working, is it is a 36v controller, or a 36v-48v autosetting type (depends on the voltage at powerup which one it sets itself to).

A quick google of your LCD model

CD-S886 - Google Search

gives a number of controller/LCD kit results, such as this one

https://www.aliexpress.com/i/3256802160076784.html

that comes in several voltage types, from 24v 250w up to 48v 500w, but all are about 10A current limit to get that power level. (in the typical range for 6FET controllers). The "undercurrent" they list is actually LVC. There is also a wiring diagram there you could see if it matches how yours is connected.

Thanks AmberWolf.
I don't know the make and model of the scooter, there is no marking on it either.
I measure the ”battery pack“, and I think the cells are 18650s. The pack is very small, I think there are only 12 cells in total, so I am guess they are all in one series.

Thanks for the AliExpress' link, I think that maybe the same kit as mine, but the same URL contains many options, ranging from 24 to 48v, and 250 to 500w, so I guess I will have to experiment to know "exactly" what I have.

Thanks again.

 

[visor_down19]

Thanks slaphappygamer! if 10amps continuous, then 350W I am guessing?

Bro i just want to ask, how 10A continuous to 350W ?
Please help thanks in advance

 

[amberwolf]

Bro i just want to ask, how 10A continuous to 350W ?

What do you mean?

 

[visor_down19]

What do you mean?

I mean just asking

 

[floydr]

Bro i just want to ask, how 10A continuous to 350W ?
Please help thanks in advance

How do you get from 10A to 350W?
The math would be continuous A x nominal voltage.
10A x 36V = 360W so 350W 10A x 48V = 480W Amps X nominal Volts
Later floyd

 

[amberwolf]

I mean just asking

Just asking what? Your question isn't clear enough for me to understand, as it doesn't contain a full sentence / question:

"how continuous to 350W"

doesn't mean anything.

 

[visor_down19]

Just asking what? Your question isn't clear enough for me to understand, as it doesn't contain a full sentence / question:

"how continuous to 350W"

doesn't mean anything.

Hexar said, i dont get what he mean bro, thats why im asking sorry of may bad english