Hi, we are an MIT startup developing a portable and programmatic ebike charger. Your input will be critical to the product design. Thank you!
What type is your eBike battery connector?
- Thread starter cyberpika
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XT-90 AS and XT-60
Glenn Goodlett
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3-pin but not XLR.
Fritz Katzenjammer
Well-known member
Some pictures of the differing types might help people answer the question.
A certain plug type does not guarantee what the pin out of that plug is. Any small manufacturer can buy a standard connector from a manufacturer and then decide how they want to configure it for their application. Different manufacturers may not hook the polarity up the same way, I know because I’ve run into it. Will your charger be able to recognize pin out variations across a given connector type and be able to compensate for them?
A certain plug type does not guarantee what the pin out of that plug is. Any small manufacturer can buy a standard connector from a manufacturer and then decide how they want to configure it for their application. Different manufacturers may not hook the polarity up the same way, I know because I’ve run into it. Will your charger be able to recognize pin out variations across a given connector type and be able to compensate for them?
Annieolnie
Well-known member
May I ask, is this for your charging input port or is this for battery output to the bike? It is a bit of an odd duck.
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speaking of duck. that general tsaos chicken with extra tang drink powder on it is quite delicious 
Annieolnie
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Hmm, me thinks you like General Tsao's chicken on a Saturday night. It has come up before.speaking of duck. that general tsaos chicken with extra tang drink powder on it is quite delicious
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It has come up before yet this time with Extra Tang powdered drink mix sprinkled on
Thats the plug on the charger.
I wanted a spare charger, couldnt find one with that plug, so I had to give Ride1Up $100.
I would have rather had an aftermarket charger for less money and less amps for when Im not in a hurry.
I wanted a spare charger, couldnt find one with that plug, so I had to give Ride1Up $100.
I would have rather had an aftermarket charger for less money and less amps for when Im not in a hurry.
Chumley
Well-known member
My oem battery uses xt60 for output, a junlei 3015 3 pin connector on the charger. Junlei is the parent company to Julet, the big maker of those nice little round connectors.
Lectric is using what appears to be a proprietary connector for the charger. I am going to check the battery later to see if I can use a more common connector after Warranty is over.
If a "better charger" was offered, I wouldn't mind an adapter to Lectrics weird port to a more standard port. If I could find this Junlei 3015 connector, I could make my own.
I have very nice, programmable chargers for my Li-Ion RC cars and planes. Wouldn't mind a better charger than supplied as long as it had some useful features (Adjust max state of charge, allow load/capacity testing, varying rates of charge, etc).
Lectric is using what appears to be a proprietary connector for the charger. I am going to check the battery later to see if I can use a more common connector after Warranty is over.
If a "better charger" was offered, I wouldn't mind an adapter to Lectrics weird port to a more standard port. If I could find this Junlei 3015 connector, I could make my own.
I have very nice, programmable chargers for my Li-Ion RC cars and planes. Wouldn't mind a better charger than supplied as long as it had some useful features (Adjust max state of charge, allow load/capacity testing, varying rates of charge, etc).
Totally. Our charger is not yet smart enough to recognize the polarity. This is a cool feature to add. Currently, we just label the polarities on the label for different adapters.
Thanks for sharing!
Thanks for sharing! I think this is junlei 3-pin 2 generation. Their 1st generation is 3 equally divided pins.
Chumley
Well-known member
I'd like to get those connectors somehow , make adapter pigtails to use the charger of my choice.
Fritz Katzenjammer
Well-known member
Using adapters is a bit dangerous. Sooner or later a consumer will use the wrong adapter, if the difference is polarity you could be looking at a fire hazard. I’ve read in an industry publication that the cause of most e-bike fires is the use of non compatible chargers.
For plugs to be safe they can only work one way, if some can be fit more than one way it will sooner or later be incorrectly fit. That is a safety and a liability issue. People get complacent, don’t read instructions or let the kids hook things up.
Trust me on this, you don’t want a member of the public having a “ thermal event “ ( seriously, that’s what it’s called in the automotive industry ) if it can be blamed on the manufacturer the insurance company’s lawyers will have a field day. And heaven forbid if someone gets hurt.
I’ve been down this unpleasant road more than once… be careful, cover your collective butts and be sure all the safeties you can possibly build into the design are in there and work.
Chumley
Well-known member
I understand. I have built battery packs and adapters for other projects. The connectors I use are polarized, so if wired correctly, no chance of reverse polarity. Coming from the Radio Control hobby, I am particular to xt60 connectors. Polarized and capable of carrying charging current without difficulty. I intend to disassemble my oem pack and see if I can change to a more common connector.
FWIW, besides working on large commercial generators (gas turbine, steam turbine, ICE driven equipment , I also play with Radio Control cars. The battery packs, BMS boards, pwm, are all similar to ebikes.
I am careful because the energy contained in all that equipment is tremendous, so careful is the word of the day.
FWIW, besides working on large commercial generators (gas turbine, steam turbine, ICE driven equipment , I also play with Radio Control cars. The battery packs, BMS boards, pwm, are all similar to ebikes.
I am careful because the energy contained in all that equipment is tremendous, so careful is the word of the day.
Fritz Katzenjammer
Well-known member
Working on other people’s bikes all day I’m surprised at how often polarity marked wire is reversed on accessories on bikes from the factory. On one bike the wire with the tracer is connected to positive, on the next the tracer is connected to negative… same make and model of bike.
And then there are the makers that use whatever colour wire comes to hand… pink for ground, purple for the hot lead ( !? ) at the battery.
I have to check polarity with a meter before connecting any accessories to be sure it’s done right.
If we can’t trust the factory to honour some wiring convention how can we trust an after market system to be compatible?
And then there are the makers that use whatever colour wire comes to hand… pink for ground, purple for the hot lead ( !? ) at the battery.
I have to check polarity with a meter before connecting any accessories to be sure it’s done right.
If we can’t trust the factory to honour some wiring convention how can we trust an after market system to be compatible?
Yeah. we are actually launching a smart charger with junlei connector. If you are interested, check out this post: https://ebikesforum.com/threads/int...charging-modes-to-maximize-battery-life.10151
