500w Cyclone Kit drains heaps of power! NO BMS!

[Pete]

This is just an educated guess. Your best bet is to get a data sheet from Cyclone.

Your battery's positive terminal needs to be wired directly to your controller +, and to the charger +

On the BMS, the Batt - terminal is wired directly to the battery - terminal. Both these terminals are the ones that already have wires on them. Ie, the ones at each end of the series string.

PDCH- goes to your controller - (Discharge load)
PCH- goes to the - lead of the charger

Everything else below is just a guess:
The reference to resistors is probably the resistors that will enable the 8 cell BMS to be configured to function properly with 4 to 7 cells (or possibly just shorting links). Specifically, setting the Low Voltage Cutout (LVC) reference point.
The header next to the large resistors will be for connection to each cell to enable balancing during charging and hopefully for cell voltage sensing for the LVC circuit during discharging. Logic says you would wire the header pins to each cell junction, but you know what they say when you ASSume

I don't know which end of the header needs to be connected to the + side of the complete pack, or if that makes any difference at all. Sorry. Maybe a bit more detail of the circuitry that runs to the base of the single, 9 pin header.

No idea what the 3 part header is for. and 6 LED's ? Dunno. If it was 8 I would guess at a state of charge indication. But 6 seems like fault codes, or system status type indications.

 

[dazzassj6]

thanks pete, i understand what you said. So P+ is Discharge/charge positive right? both on the same terminal

How do u connect wires to individual batteries?

hmm i already emailed the guy for more information see what he gives me.

 

[RayB]

I also received a cyclone battery with no BMS attached. Except, I purchased mine directly from Cyclone in Taiwan. A little pissed about it to be honest as on the web page it states the batteries come with a BMS. I will be sending it back to them this week and will post some pictures of it attached once it is back in case that can help you at all. But, by then you may have it all figured out. Anyone know where we can buy more cells like the ones pictured. My battery like this one is also 24V 10ah. I would like to bump it up to 20ah once I get it back from Cyclone.

Thanks.

 

[Pete]

How do u connect wires to individual batteries?

Use crimp terminals, the same way as the main power connections to each end of the cell string. Your BMS _should_ have come with the connector and ribbon cable to plug into the balancing connector on the BMS. If not you will need to find the right connector. I can't help you with that, sorry.

Hopefully they can get back to you with a datasheet for the BMS and the balancing cable.

 

[dazzassj6]

Paco sent me a wiring diagram for the BMS to battery system.

 

[trappermike]

Your Cyclone motor should spin the advertised RPM with nothing(no chain) connected to it,if it is running really slow,then I would say it has a problem.I have a simple inexpensive "vibration" type tachometer that is surprisingly accurate,I would test the motor with that to see if it seems to run at proper speed with no load.
I cannot imagine a Lithium battery pack with no circuit board to control charging and discharging,I custom ordered a Li-ion battery pack,and the circuitry was designed for the amps output I specified.And as far as I know,a lithium battery will not tolerate high amperage draws for long. Also,lithium batteries are very particular about recharging(As in millions recalled in laptops etc.,burn baby burn!),and require their own integrated circuit board .When the circuit board in my Li-ion failed it would not recharge,so I tried to bypass it and charge the batteries,I watched them closely,but as I expected the pack suddenly overheated and I cooked them.... $400 shot to hell...The only thing good I can say about them is they ARE very light and compact,and maybe well suited to a motor without a high amp draw.
And remember,at 24v at 550w you are drawing twice as many amps as a 48v system...
Personally I think that with a motor like a Cyclone that can want to draw heavy amps at times a Lithium battery is not the best idea...
By "Lithium" I'm referring to Li-ion,Li-PO4,etc.
I am going to build a bike with a 650w Cyclone(36v) next,but I will use a Ni-Cad pack(21-24ah),or suffer the wieght of SLA's....

 

[Pete]

Lithium chemistry is perfect for the Cyclone. But the pack must be sized to suit the motor it will be driving. You wouldn't use a volkswagen to tow a semi trailer. Same concept with batteries.

 

[wildnrg]

I've got a Cyclone 24V 10AH batt pack with BMS, does that mean the stardard 2A charger just outputs about 29V and is just dumb charger, ie I can just use any charger that outputs the same voltage (maybe at 10A) instead of buying a dedicated LiFePO4 charger?