New battery help!

[Cam3roon2k41999]

Hi, I have just ordered a 60v 25ah battery for my 3kw motor but I'm concerned, it may sound stupid but some people are saying that when you connect the battery you will get a spark but with my 48v 13ah I hard wired that one, so if I hard wire the 60v will that cause a spark or will I be OK as the 60v doesn't have a on/off switch as far as I'm aware of? Thanks for replying

 

[vfr400]

It'll make a spark when you connect it with the battery switched on. The higher the voltage, the bigger the spark. 60v makes a good one, especially if you have a nice big controller.If you're going to attemp to solder with the battery switched on, you need to use a pre-charge resistor between the wires, otherwise it'll blow away the solder.

 

[Cam3roon2k41999]

It'll make a spark when you connect it with the battery switched on. The higher the voltage, the bigger the spark. 60v makes a good one, especially if you have a nice big controller.If you're going to attemp to solder with the battery switched on, you need to use a pre-charge resistor between the wires, otherwise it'll blow away the solder.

I have no experience in soldering so what I am thinking is I've also ordered a EC5 male to female would I be able to cut that in half, splice the wire and crimp my battery wires to it and the same with the controller side? Then just connect them

 

[Cam3roon2k41999]

Also i do have a ignition setup on my bike the red wire from the display connector is connected to my ignition if that would make any difference?

 

[Benjahmin]

I used to work for B.T. many moons ago, their systems worked on 50v D.C. So I can tell you that this sort of voltage can cause serious burns if mishandled. That's why there is a legal limit to e-bike battery voltages - 48v I believe.
Once again what you are doing is not OK. With the scant knowledge , lack of skill and an apparent unwillingness to take advice that you display you are putting yourself and others at risk.
Please just go and buy an electric motorbike, register it, insure it and enjoy it - legally - and stop messing with things that could bite you.

 

[vfr400]

Also i do have a ignition setup on my bike the red wire from the display connector is connected to my ignition if that would make any difference?

The ignition wire makes no difference. It only powers one side of the controller. The big capacitors, which cause the spark are straight across the battery wires.

You can't crimp the battery wires unless you have proper professional equipment and connectors that are designed to be crimped. They're going to be carrying 50A, so they'll overheat and catch fire if not adequately crimped.. EC5 is designed for soldering.

 

[Cam3roon2k41999]

I've just went ahead and ordered a £20 soldering iron lol my friend said he will solder it for me hopefully

 

[Cam3roon2k41999]

Also I seen a YouTube video of someone with a fully charged 72v battery with normal xt90 connectors and the spark didn't look that intense but he was also running it direct to the controller

 

[sjpt]

I used to work for B.T. many moons ago, their systems worked on 50v D.C. So I can tell you that this sort of voltage can cause serious burns if mishandled. That's why there is a legal limit to e-bike battery voltages - 48v I believe.
Once again what you are doing is not OK. With the scant knowledge , lack of skill and an apparent unwillingness to take advice that you display you are putting yourself and others at risk.
Please just go and buy an electric motorbike, register it, insure it and enjoy it - legally - and stop messing with things that could bite you.

I believe there is nothing specific for ebikes, they come under the general low voltage rules, 75V DC.

I may be wrong, and in any case Benjahmin's points remain very pertinent.

 

[Cam3roon2k41999]

I have just connected the battery up and the bike turns on for about 2 seconds and shows error 06 on my sw900 lcd what could this be all the connections are done correctly and battery is brand new and fully charged?

 

[vfr400]

I have just connected the battery up and the bike turns on for about 2 seconds and shows error 06 on my sw900 lcd what could this be all the connections are done correctly and battery is brand new and fully charged?

That'll probably be your motor cable. Check that it's connected properly first, just in case there's an easy solution.

 

[Cam3roon2k41999]

That'll probably be your motor cable. Check that it's connected properly first, just in case there's an easy solution.

Thank you I sorted it now anyway what I had to do is change PO3 setting from 48 to 52v as I changed it to 72v but same thing and now working fine on 52v setting and Po14 setting (amps) was set to 48 but I'm sure it's max is 20?

 

[vfr400]

Error 6 is motor problem - nothing to do with voltage or current.

 

[Cam3roon2k41999]

It's under voltage for the sw900 lcd

 

[Cam3roon2k41999]

Error 6 is motor problem - nothing to do with voltage or current.

Your probably thinking of the KT-lcds

 

[vfr400]

Your probably thinking of the KT-lcds

Your probably thinking of the KT-lcds

Sorry, you're right. I was looking at the SW900 manual, but I must have crooked eyes. It's these bloody cheap verifocals that make straight lines curved.

 

[Cam3roon2k41999]

Sorry, you're right. I was looking at the SW900 manual, but I must have crooked eyes. It's these bloody cheap verifocals that make straight lines curved.

Haha its OK it's all sorted now thankfully but now I'm getting a error 10 lol so I'll have to see if I can sort that now