Just ordered a 750w BBS02, my first electric bike !

[CroydonTed]

I'm trying to - but theres no definitive source of info about compatible chargers, PSU to run charges, BMS systems etc

It's a minefield! I'm well aware about the inherent dangers of LiPoly but I want concrete info on what charger, PSU and how to program the thing to charge correctly. I can't seem to find anything. It's seems you either know about this stuff or you don't...

 

[Deleted member 4366]

When you mentioned charging as fast as possible, it becomes much more complicated and expensive. You didn't mention a budget. Do you already know the basics of caring for lipos?

 

[CroydonTed]

Yeah - I understand the HVC and LVC - storage charge etc - but what I'm not sure of is what charger and PSU to buy to charge these batteries in a reasonable time frame - time to charge is important but also cost is important if you get my drift!

On my bike I will be using a Cycle Analyst to warn of low voltage so therefore I've read that I will need to balance my cells regularly too to make sure I don't mess the packs up. Therefore charger needs to be able to do this reliably.

Does that make sense - I'm reading a lot but it's quite overwhelming and need some direction...

 

[CroydonTed]

http://www.hyperion-eu.com/products/product/HP-EOS1420iNET3/

I think I need something like this.

 

[mfj197]

That particular one is discontinued and there aren't many around that do more than 10S. I use an iCharger 1010B+ which will do 10S so you could use this and charge each pack separately. You also need a big power supply to drive them - I use this 350W one from Hobbyking.

I have to say that if you're spending big money on chargers why not just get a commercial li-ion pack instead? Made from 18650 cells, safer, come with charger etc.

Michael

 

[Deleted member 4366]

For a 12v power supply, you can convert a server power supply, which costs about £10 from Ebay. That Hyperion charger is 550w max, so you need a power supply of at least 750w. If you charged at 5A, it would be done in about 3.5 hours. That's around 250w, so you could use a 500w power supply.

 

[mfj197]

For a 12v power supply, you can convert a server power supply, which costs about £10 from Ebay. That Hyperion charger is 550w max, so you need a power supply of at least 750w. If you charged at 5A, it would be done in about 3.5 hours. That's around 250w, so you could use a 500w power supply.

Would probably be quieter than my Hobbyking one too. The fan wails like a banshee if I'm pulling high current from it.

 

[Deleted member 4366]

http://www.rcgroups.com/forums/showthread.php?t=1292514

 

[Kinninvie]

Hi - I have just purchased 2 x Multistar High Capacity 6S 16000mAh for my electric bike and I need to charge them as fast as possible and make sure they are balanced - what charger did you get? Sorry I'm a noob to this stuff!

Thanks

Ted

I use a pair of Meanwell NES 350-48 power supplies to charge my Multistars.
http://www.ebay.co.uk/itm/Mean-Well-MW-48V-7-3A-350W-AC-DC-Switching-Power-Supply-NES-350-48-UL-PSU-/370887902167?pt=LH_DefaultDomain_3&hash=item565aa443d7
Wired in parallel they charge at 17.3 amp.
You need to set them to EXACTLY the same voltage and will need to put a wattmeter on the charging cable so you can keep an eye on the charge state.
They are CC/CV so go down to 0A when the batteries are full.

I use one of these to check the balance although as long as you keep the cells above 3.6V they tend to stay in balance anyway.
http://www.ebay.co.uk/itm/400905641576?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT

I also carry it with me to check the batteries if I am getting near to 3.6V.