Building your own Lipo Packs

[X34]

This is how it looks after I have finished. It is under going charging and balancing. New built packs are normally unbalance. Some good commercial pack builder charge the cells fully before assembling them, and half discharge it after before shipment.

As you can see one of the balancers are showing read, it means max voltage has reached. It is taking away the charge from that cell and letting the other 2 cells to continue charging.

[X34]

Battery and balsa spacers, the 2nd photo shows the spacers are stick to the batt using thin double sided tape.

[X34]

Stick them together in series if it is a series pack, parallel if it is a parallel pack. next step solder them.

[X34]

If u got any question or suggestion please feel free.

The terminals are soldered and ready for wire to be attached.

[rifqi]

this is really interesting, always wanted to noe the steps to make ur own lipo packs thanks X34!

ok, heres my question, where exactly do u solder? maybe u can elaborate more..

i assume thats a 3s1p pack?? am i right?? correct me if im wrong

rifqi.

[HZM]

Thanks for sharing

Mike

[X34]

this is really interesting, always wanted to noe the steps to make ur own lipo packs thanks X34!

ok, heres my question, where exactly do u solder? maybe u can elaborate more..

i assume thats a 3s1p pack?? am i right?? correct me if im wrong

rifqi.

Rifqi,

It my pleasure, since I m making the packs for the EP 8, thot i just share it.

Will take photo of it in detail.

Yes, its a 3s1p..

[X34]

In post one I showed one balancer flashing, below is another picture showing a second one flashing, the third one voltage is still low so it is not flashing.

The second photo show the terminal being soldered on.

[X34]

Attached are photos showing the soldered tabs. The solder is inbetween the 2 tabs. U would need a soldering iron of 60 to 80 watts

[lu wei yao]

Thanx for sharing james. Really enjoy ur threads. But i have one note of caution, No matter what you do guys, Pls remember that Lipo packs would always be lipo packs. be extra careful when soldering to prevent any major shorts. U would not want to have ur hobby take ur life away, its just not worth it. So pls, be careful ok!

Thanx!

[X34]

Thanks Wei Yao, must be careful not to short them, if in doubt always cover the exposed terminals with insulation tape, like what I did with the battery terminal.

Next part adding the balancing wires.

[X34]

Finally packaging, double sided foam tape is used for protecting the battery terminals, than another layer of electrical tape and finally kapton tape for wrapping the entire pack. I always leave the side uncovered for cooling otherwise the centre cell will be cooked.

Normally takes less than 20min to built a pack, but tonight to many other interuptions.

The pack is now ready for charging and balancing

[rifqi]

great!! thanks bro for the detailed explanations!

rifqi

[Tele]

I can say that these balancers are great and give you some peace of mind.
accedently charged a 3 cell pack at 4 cell rate and the balancer saved it ..they didnt over charge ...

PS I do not recomend that method to test if the banancer works

cheers doug

[mechplas]

Nice work man! I guess this is an eye opener for many....including me. Thank you for sharing.