Many thanks for all your responses
Li Ping sent me a revised wiring diagram saying : -
“The black is "-" for discharge. When you connect the battery to the controller or motor, use the bigger red wire as "+" and black wire as "-". When you connect it to the charger for charging, use the thinner red wire as "+" and blue wire as "-".
I am now getting 39 volts across the terminals were as before I was getting zero as I was measuring the wrong wires!!
I'm glad i asked for advice first or could have damaged the battery.
This was easy to get wrong as both pairs of wires were going in at opposite ends, the correct way was to use one wire from opposite sides, using the thicker of the two reds as positive.
The wire thickness between the two reds was not easy spot untill you looked closely
I am now in the process of wiring in fuses and cut off switches.
One question is can I use my eZee charger on the Ping battery?? I have plenty of suitiable XLR plugs.
Michael
You could always have taken a look on the website - the connection details are shown on there in a very easy to understand form.
Li Ping does supply you with a free charger - why would you want to use something different? Unless you are certain of what you're doing - i.e. that the eZee charger is totally compatible - why take that sort of risk, especially as you didn't understand the connections in the first place. Not only that, when you asked for advice on here you didn't even mention the two red wires! We were led to believe there weren't any. If you want decent advice, you've got to get your facts right.
Any battery has positive at one end and negative at the other - if they appear to come out of one end together, it's because, in effect, the battery has been 'folded' electrically to achieve the necessary size and shape. It's really a 'pile' of cells (that's the old-fashioned word for a battery - originally called a 'pile').
PS - I got curious, and I can now answer your question about the eZee charger more definitely - it's 'NO!'
The eZee range use Lithium Polymer batteries, and the chargers for those (the 36 volt versions) are rated usually at around 42 volts. Mr. Ping specifies that to recharge his 36 volt batteries requires a charger producing 45 to 46 volts. If you tried to use an eZee charger you'd find recharging would be very slow and would probably never complete.
Obviously, don't try things the other way round either - you would possibly destroy both the eZee battery and your Ping charger.
Rog.