ESC Battery balance lead

[crashbash]

Ok you guys, see if you can answer this,
I need to make up a connector with a lipo balance lead on one end and a standard servo plug on the other, problem servo plug 3 wires, balance plug 4 wires, this is for my 4o amp esc which has an individual lipo cell monitor. So basically balance plug of the battery into a female balance plug with 4 wires coming out of it, into the esc which has a servo type plug (3wires).
Do I loose a wire somewhere or connect somewhere else, and if so which wire.

CONFUSED

I new it would'nt be that simple

Rob

 

[Tony]

I'm not quite sure what it is that you are asking. The balance plug should only be used for charging, or for the cell monitor, and it should plug right in. Can you get some pics of what it is that you are wanting to do? Or a drawing or something?

 

[crashbash]

The esc has an individual in flight lipo cell monitor and will not work until the lipo balance plug is plugged in. So I have got a female balance plug but I need to solder it to the three wires coming out of the esc, red, white and black. I could buy the correct adaptor but I would have to wait as it is not local.
The esc is an Acer Lab 40amp

 

[Tony]

okay, if you are flying with only 3 wires, then it's a 2s battery, correct? Honestly, I would order the plug so that you cna unplug it. I have tried a search on the net, and I can't really find any info on that ESC and this connection. I guess you could hard wire it to the battery, but that would be a PITA when you had to charge the battery. Only way I'm seeing this is to order the plug unfortunately.

 

[crashbash]

Thanks Tony,
Its a bit hard to explain but it is for a 3 cell lipo. Of the 4 wires in the balance plug, 1 is a negative wire (black) the other 3 are the balance wires one for balancing each cell.
I think I have it sorted, as there is only 3 wires to connect I presume the negative connection is being picked up by the connection on the deans power plug. All I need to do is omit the negative wire and solder the other three wires to the female balance plug, then just stand well back when I plug it in.
I could order the plug but I would have to wait at least a week pay about 5 pounds sterling, when I could make one for 50 cents, Moto never be beaten by comercialism.

Regards Rob

 

[Tony]

Oh okay, I see what you are saying kinda lol. Yes, the ground is common and will be used through the big wires. If you are doing what I think you are doing, I would just use the servo connection like you are talking about. As long as you have a male and female plug, you should be golden. Then, just solder it onto the battery so there will be two plugs. One for the ESC, and one for the charger. Let us know how it goes when you get it done.

 

[Paulster2]

I cannot say for sure Rob, but what you are saying about eliminating the ground (or earth ) from the mix is probably the right choice. It makes sense. If you could do something on a temp basis and test it, I bet you'd find it's the right approach, then once you have validated, you could go back and make some permanent changes.

 

[crashbash]

I am going to leave the male standard jst-xh balance plug on the battery as all mine have the same plug (align)
I am going to solder a female jst-xh balance plug to the 3 esc wires so I just plug and go, will try over the next few days, Should be ok as I have been on google for the past hour.

Rob

 

[Keith]

The ESC will probably shut down early if it detects a low cell even though the battery has plenty left in it... I think that maybe the idea to keep all cells balanced...

 

[crashbash]

Well, the lead I made did not work for some reason, I need to do a bit more research. On the other hand having gone through the set up for new esc I found out you can use it without this lead, just as a normal esc, so progress has been made.

Rob

 

[Tony]

I would do it without that lead lol. That lead seems like a pain in the butt haha.

 

[Keith]

You only need the lead if you want the ESC to monitor each cell indevidually... It still monitors the total volts of battery....

 

[crashbash]

I wasn't really keen on it anyway just another thing to plug in every time you change the battery, the manual for the esc didn't state you could use it without the lead until you got through about 90% of the setup.
Anyways it is working ok now, just need the time go fly.

Rob