60v battery charged to 80% for BBSHD?

[slm9s]

Go easy, I'm new to this...

I am building my first ebike, full suspension with BBSHD. I've searched and there a FEW threads about doing this. It seems that a 60v battery charged with a "smart" charger charged 80% would give the best lifetime for the battery and be under max voltage and provide the max miles/power/etc from the BBSHD. Is anyone doing this? There are "shark" shaped 60v batteries available. Are there "smart" 60v chargers that don't cost and arm and a leg?

Any downside to doing this? I would think that if you charged the 60v battery too much you would just get the over-voltage error and have to partially discharge the battery - nothing would be harmed, correct?

Thanks in advance.

 

[JackFlorey]

Go easy, I'm new to this...

I am building my first ebike, full suspension with BBSHD. I've searched and there a FEW threads about doing this. It seems that a 60v battery charged with a "smart" charger charged 80% would give the best lifetime for the battery and be under max voltage and provide the max miles/power/etc from the BBSHD.

The cheapest way is to get one of the Meanwells and trim the voltage to 4.05 or 4.1 volts per cell. Cheap and quick - but not smart.

The best way is with something like the Satiator which is completely programmable so you can get it to terminate whenever you like. Advantage there is faster charge times.

 

[spinningmagnets]

I charge to 90% 4.1V, Using a 52V battery on a BBSHD.

I swapped-in a smaller chainring, and the climbing ability is outstanding without the motor and controller getting hot.

Ive had it for years, and its still going strong.

Do you already have a 60V battery?

 

[gobi]

What battery, specs pls
What configuration?

Meanwell - does not have a 60v unit, you will to put 2 units in series

Where? at home? on the go?

I charge at home using my Riden RD 6018,
the max volts for Riden is 60V

it is pricy but has a lot of cool feature that you will use. This is my go to charger.

Riden will need a power supply to operate

From what I have read, for max batt life 4v max charge is suggested.

 

[E-HP]

Any downside to doing this? I would think that if you charged the 60v battery too much you would just get the over-voltage error and have to partially discharge the battery - nothing would be harmed, correct?

Unless you have a smart BMS that can balance at less than full charge, you will need to fully charge the battery to balance it occasionally, so it may take a while to discharge down from 67V.

 

[Eastwood]

80% would give the best lifetime

Well depends on what your goal is, are you more concerned with range or lifecycles of the battery?

I don’t have a BBSD but it seems like most guys run at 52volts. I’m sure It can handle 60volts but you would need to fully charge the battery to be able to balance the cells, so stopping at 80% every time actually isn’t good.

Personally I Always charge my batteries 100% as I’m more concerned with the range and power. But I get it if you’re trying to make your battery last longer and you don’t need the range then yeah stop around 90%

Edit: also if you end up using the 60 V battery you could just turn down the power settings when the battery is fully charged and limit the current.

 

[slm9s]

What will give more time/distance/power, a 60v 20ah battery starting at 80% or a 52v 20ah battery starting at 100%?

 

[E-HP]

What will give more time/distance/power, a 60v 20ah battery starting at 80% or a 52v 20ah battery starting at 100%?

60 x 20 = 120Wh x 0.8 = 960Wh
52 x 20 = 1040Wh

 

[slm9s]

Could you charge the 60v to 90% and stay under the BBSHD's max volts? I think I've seen 58.x volt max???

Would it be 90% of 60 volts - 54 volts, or 90% of a max charged 60v battery which starts a little higher, maybe 65 volts?

Or should I stop trying to re-invent the wheel and stick with a good 52v battery? :wink:

Sorry if I'm asking dumb questions.

 

[E-HP]

Or should I stop trying to re-invent the wheel and stick with a good 52v battery? :wink:

The short answer is yes, unless you want to complicate your life or fry something inadvertently.

 

[Eastwood]

Could you charge the 60v to 90% and stay under the BBSHD's max volts? I think I've seen 58.x volt max???

Would it be 90% of 60 volts - 54 volts, or 90% of a max charged 60v battery which starts a little higher, maybe 65 volts?

Or should I stop trying to re-invent the wheel and stick with a good 52v battery? :wink:

Sorry if I'm asking dumb questions.

I can certainly see the temptation with the 60v battery since it’s so similar to a 52v pack.
So is there problems reported with frying the motor with a 60 V battery? Like I mentioned you could run the 60 V battery and turn down the power settings until the battery drains down to whatever voltage you’re trying to achieve. That’s only if you charge to 100% to balance the cells.

So so be on the safe side yeah use the 52v battery but I personally would go with 60v because I think more volts and or amps is always better lol

 

[E-HP]

So is there problems reported with frying the motor with a 60 V battery? Like I mentioned you could run the 60 V battery and turn down the power settings until the battery drains down to whatever voltage you’re trying to achieve. That’s only if you charge to 100% to balance the cells.

I don't think it has to do with the motor. I think the issue is the high voltage protection kicking in above 58.8V, and then then the 63V capacitors popping when the 16S battery is fully charged to 67V.

 

[dogman dan]

Yes, just get a 52v battery. If you like, undercharge it by just 10%, but periodically, say once a month at least, charge it full so the bms can balance it. Then immediately ride off the 10%. Its not the charge full that hurts, its sitting there full for long periods, for lithium.

But if you insist on the 60v route, have some method of discharging it once you do those balance charges, if you can't just ride the bike.

 

[slm9s]

I'll probably just get a 52v then. But just for my own education, is there a cheap household/etc item that I could power with a 60v battery to discharge it slowly to get it down to the wanted voltage?

 

[E-HP]

I'll probably just get a 52v then. But just for my own education, is there a cheap household/etc item that I could power with a 60v battery to discharge it slowly to get it down to the wanted voltage?

Not a common item in stores nowadays, but an incandescent light bulb would work for slowly discharging.

 

[sinkking]

You can buy 63v chargers for cheap that aren't smart

 

[sinkking]

I don't think it has to do with the motor. I think the issue is the high voltage protection kicking in above 58.8V, and then then the 63V capacitors popping when the 16S battery is fully charged to 67V.

They don't pop you just get an error message.

 

[sinkking]

Go easy, I'm new to this...

I am building my first ebike, full suspension with BBSHD. I've searched and there a FEW threads about doing this. It seems that a 60v battery charged with a "smart" charger charged 80% would give the best lifetime for the battery and be under max voltage and provide the max miles/power/etc from the BBSHD. Is anyone doing this? There are "shark" shaped 60v batteries available. Are there "smart" 60v chargers that don't cost and arm and a leg?

Any downside to doing this? I would think that if you charged the 60v battery too much you would just get the over-voltage error and have to partially discharge the battery - nothing would be harmed, correct?

Thanks in advance.

Did you ever try this?

 

[E-HP]

They don't pop you just get an error message.

Sure they do. First they start to bulge, then they pop and the electrolyte spits out the top.

 

[sinkking]

Sure they do. First they start to bulge, then they pop and the electrolyte spits out the top.

It won't even let you run the bike above 63v you get an error message. I used a 60v battery for a while and didn't have any problems. I'm using a bbs02 v1 though maybe it's more overbuilt than v2 and HD

 

[amberwolf]

It won't even let you run the bike above 63v you get an error message. I used a 60v battery for a while and didn't have any problems.

Hmmm...just to be sure we're all on the same page:

A "60v" battery is only about half full when it's actually at 60v (depending on the specific configuration and chemistry); assuming non-LFP Li-ion, it fully charges to around 67v, which is above 63v.

So, does that mean you were not fully charging when using that battery?

Or was it a ~60v-when-full battery (such as a 14s "52v" battery that charges to almost 59v)?

 

[999zip999]

Get the 52v battery . And don't make trouble for yourself.
Charge it to 90%, ride your bike. Know exactly what cells are in the pack and don't buy it if the guy says he has Tesla cells he did not put Tesla cells in the pack.
What kind of battery you thinking and what cells are inside not Panasonic not Samsung but Panasonic in the model number Samsung and the model number of the cell. If he's making a good pack he'd be proud to tell you what's inside. K.I.S.S