What is the best quick release plug?

[andrenoites]

In the bike I'm building, the battery will be carried it the backpack.

I could use a good quick release plug to break the connection once I fall from the bike.

Any sugestion?

Tnx,
André

 

[spinningmagnets]

The Rosenberger Power/Data (RoPD), is the new European standard for E-bikes and E-wheelchairs for public charging. The leads are held on by magnets. They are rated for 12V-48V and up to 40A of current. I don't know how good they are, or if they would be "best" for your application...

 

[wannesd]

Found a place which supplies these. They don't seem to have the plug that's in the photo though, any idea on that?

About the power rating: they say 48V - 40A, would 100V - 10A also work?

 

[andrenoites]

Nice find
It seems good quality plugs but also seem very expensive.

I recall someone said that Polymax 5.5mm Gold Connectors were easily detachable. Can anyone confirm this?

 

[ambroseliao]

About the power rating: they say 48V - 40A, would 100V - 10A also work?

48Vx40A=1920W

100Vx10A=1000W

Sounds as if it would work with lots of safety margin!

 

[spinningmagnets]

I am not an electrician, but...I believe the issue with higher voltages is that engineers want the pins on each socket to be farther apart. Higher voltages can make contact easier across sketchy resistance in the plug, and they can arc across greater distances in the air. The issue with higher amps is that you need fatter wire/plugs/sockets to handle the higher current, or you risk melting something, or starting a fire.

48V plugs should work fine on 100v, and 40A plugs are definitely fat enough to handle 10A

 

[wannesd]

Just wonder why they specified such a low voltage... would be a great connector otherwise, IF the supply the cover too, to keep the elements out of the female connector.

 

[Ypedal]

Anderson Powerpoles....

 

[ambroseliao]

Anderson Powerpoles....

Ditto. Cheap, reliable, easy.

 

[Chalo]

About the power rating: they say 48V - 40A, would 100V - 10A also work?

48Vx40A=1920W

100Vx10A=1000W

Sounds as if it would work with lots of safety margin!

Lots of safety margin on ampacity, but not so much on spark gap. I reckon it would work, though.

 

[andrenoites]

Sweet
That's the kind of stuff I was looking for.
Cheap and functional

Tks

 

[John in CR]

Figure out a way to neatly and securely attach the backpack to the bike while riding. Backpack batteries seem like a great idea, but that wire between you and the bike really sucks. It sucks while riding. It sucks making the connection to start the ride. It sucks making the disconnection at the end of the ride. The battery being in the backpack, as long as it's not too heavy isn't an issue. It's that damn umbilical cord. If it's too short it's restrictive, especially getting off and on. If it's long, then where does it go so it's not in the way and not going and getting tangled in the chain or the wheel. Connectors are the least of your worries.

 

[wannesd]

About the power rating: they say 48V - 40A, would 100V - 10A also work?

48Vx40A=1920W

100Vx10A=1000W

Sounds as if it would work with lots of safety margin!

Lots of safety margin on ampacity, but not so much on spark gap. I reckon it would work, though.

So what you're saying these are designed for spark gap of 48V?

my 22S charger gives out 92.4V. Say I run my pack down to LVC, at 77V. That's a difference of 15.4V, if the charger is switched on before connecting.
So should work, right?

 

[Chalo]

Lots of safety margin on ampacity, but not so much on spark gap. I reckon it would work, though.

So what you're saying these are designed for spark gap of 48V?

I have no idea what voltage they are designed for. But I know that 100V can jump twice as far as 48V (not very far in either case). I had a similar question about a 24V rated switch recently, and the answer I got was similarly inconclusive.

It's not the size of the gap but the energy passing across it that damages your contacts, so it's best to plug the charger in first, then turn it on.

 

[wannesd]

It's not the size of the gap but the energy passing across it that damages your contacts, so it's best to plug the charger in first, then turn it on.

Doesn't make sense. First plugging charger in and then turning it on makes for a greater dV at the connector.

 

[Chalo]

But no spark at the contacts.

 

[wannesd]

Unless the battery voltage goed to the unpowered charger, to charge its caps or whatnot (really don't know anything about chargers).
My hyperion charger however, clearly says that charger must be powered on before connecting the batteries, to avoid this situation.

 

[andrenoites]

Figure out a way to neatly and securely attach the backpack to the bike while riding. Backpack batteries seem like a great idea, but that wire between you and the bike really sucks. It sucks while riding. It sucks making the connection to start the ride. It sucks making the disconnection at the end of the ride. The battery being in the backpack, as long as it's not too heavy isn't an issue. It's that damn umbilical cord. If it's too short it's restrictive, especially getting off and on. If it's long, then where does it go so it's not in the way and not going and getting tangled in the chain or the wheel. Connectors are the least of your worries.

After a lots of research in this forum I decided the best route for the cable is under the frame onto the handlebar, plugs on the handlebar and then cable directly to the backpack.
We will seed if that works after I receive thar parts to assemble

The spiral power cable also looks like a good upgrade:

http://p.globalsources.com/IMAGES/PDT/B1025937841/Spiral-cable.jpg

 

[dogman dan]

Andersons would work fine. I use that when doing quick tests of bikes with no battery carrier built yet. I just put the connection at the seat, and a battery in a messenger bag. That way once I start riding, the wire is behind me.

Spiral cord would be great, if you can find some in 12 gage.

4mm bullets also pull apart easy enough to use them.

 

[chilledoutuk]

i had an idea of somehow putting a battery pack into one of those small suitcases with wheels and attach that somewhere on the bike.

that way you can detach it and take it into somewhere with an outlet and charge your entire battery pack and if your pack is very big and heavy you can just wheel it along the ground with the wheels.

it would be very stealth as its not uncommon to see people wheeling them around.

In the UK every public library has points where you can plug in your laptops etc that's 13A at 240v shouldn't take to long to charge a biggish pack and be on your way.