Eclipsebikes bottle battery pack

[simon_lipari]

Hi. Anyone have experience with the products from Eclipsebikes.com?
They have a 48v 11.6 Ah bottle battery that I could purchase with the 750w mid drive.
The pack is £285.
One alternative for me is to get a 500w mid drive from wooshbikes.co.uk and get their 36v 15 Ah kit, but added £25 for charger and expensive EU shipping it seems.

Thoughts on the eclipse battery?

http://eclipsebikes.com/116ah-lithium-frame-battery-samsung-cells-p-1105.html

 

[patpatbut]

I got the headway cells from them and their support is very good. They even gave me advice via email when I ordered them.

Can't say more about this bottle battery though

 

[Fordulike]

Hi. Anyone have experience with the products from Eclipsebikes.com?
They have a 48v 11.6 Ah bottle battery that I could purchase with the 750w mid drive.

http://eclipsebikes.com/116ah-lithium-frame-battery-samsung-cells-p-1105.html

Exactly the same battery and motor kit that I'll be buying from them.
They're getting some new batteries sometime in February, as they are out of stock at the mo.
Have pestered them with various questions about the products and they have responded in a professional and timely manner.
The battery appears to be one of the Samsung packs that you see all over the web these days. Have done some research and haven't heard a bad word about them, although they are probably bordering on the max discharge rate when used with the 48v 750w BBS02.

 

[simon_lipari]

Exactly the same battery and motor kit that I'll be buying from them.
They're getting some new batteries sometime in February, as they are out of stock at the mo.
Have pestered them with various questions about the products and they have responded in a professional and timely manner.
The battery appears to be one of the Samsung packs that you see all over the web these days. Have done some research and haven't heard a bad word about them, although they are probably bordering on the max discharge rate when used with the 48v 750w BBS02.

You mean the discharge rate is close to too high or too low? I'm learning everyday about these electric things

 

[Fordulike]

You mean the discharge rate is close to too high or too low? I'm learning everyday about these electric things

Although no expert on batteries, I would say that as the Eclipse Bikes Bafang has a 25 amp controller, then this is the maximum current that I would personally be happy to draw from the Samsung battery.
Bear in mind that this would be the peak current drawn from the battery and not continuous, so should be ok.

I don't want to get into C ratings, as I'm not too hot on explaining things and may confuse you, but maybe someone else like flecc or d8veh could briefly touch on this

 

[Deleted member 4366]

The cells in the Eclipse battery are rated at 2C according to the Samsung SDI website. That means they can discharge at a rate of twice their capacity. The capacity is 11.6AH, so they can discharge at a rate of 23.2A. The next consideration is how much continuous current the BMS can give without overheating. Without knowing what BMS, it's impossible to say, but one would expect it to be above the rating of the cells, so the battery is probably a good match for the BBS02 provided that you're sensible. It would definitely be OK for the 500w version. Crank drives can be held at their maximum current by using higher gears, so you have to be a bit more careful that you don't draw the maximum current for too long at constant high speed. For hub motors, the current tends to go down as the bike goes faster. Their problem is at low speed, like when climbing.

 

[simon_lipari]

Thanks both of you, cleared it up a bit

 

[simon_lipari]

The cells in the Eclipse battery are rated at 2C according to the Samsung SDI website. That means they can discharge at a rate of twice their capacity. The capacity is 11.6AH, so they can discharge at a rate of 23.2A. The next consideration is how much continuous current the BMS can give without overheating. Without knowing what BMS, it's impossible to say, but one would expect it to be above the rating of the cells, so the battery is probably a good match for the BBS02 provided that you're sensible. It would definitely be OK for the 500w version. Crank drives can be held at their maximum current by using higher gears, so you have to be a bit more careful that you don't draw the maximum current for too long at constant high speed. For hub motors, the current tends to go down as the bike goes faster. Their problem is at low speed, like when climbing.

One guy on endless sphere tested his bbs02 750 watt drive to the following

PAS Level 1 - Max of 220W assist
PAS Level 2 - Max of 776W assist
PAS Level 3 - Max of 1022W assist
PAS Level 4 - Max of 1022W Assist (No difference from Level 3)
PAS Level 5 - Max of 1156W Assist (25.3A/Max Possible Current)

So those 25.3 Amps on PAS level 5 is what, the most current the motor needed, or that the BMS could supply, when he tested ? What does that mean for the 23.2 Amps you read of the SDI website, theoretically, combined with the same drive? Although on a completely different bike/setup.

 

[Deleted member 4366]

The 25.3A is the maximum that the controller will allow from the battery. My calculation says that level 5 is about 22 amps. Obviously, when you have a lower PAS level, the current will be less. All those power levels are programmable if you get a programming adaptor.

The BMS will probably allow 40A, so it can give a lot more current than you need. The main idea is that you shouldn't draw current continuously above the continuous rating of the battery (20A), so you shouldn't use level 5 continuously, but it's OK to use it in stop start situations or for short periods like hill climbing, but, to be honest, I can't see a couple of amps being much of a problem.

 

[trex]

..
One alternative for me is to get a 500w mid drive from wooshbikes.co.uk and get their 36v 15 Ah kit, but added £25 for charger and expensive EU shipping it seems.l

the woosh battery kit includes charger. There are two prices in their online shop: one for UK and one for EU (at the bottom of the online shop page). For EU:
500W BBS02 + 36V 15AH battery, including delivery to EU address: £379 + £345 = £724

 

[simon_lipari]

Ok. The guy at eclipsebikes said that for general riding with pedaling the bottle battery works with the 750, but for constant high speed and no pedaling, opt for another battery, like you already explained to me. I'm really looking forward to this. End of February he said the batteries and motor kits will be back in stock. Just struck me how many watts a road bike cyclist puts out during climbing bursts.. This will be a rocket ride.