Need a little bit help.

Chrisfinlayson

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Hi im building a 20S pack that will split into 4X5S packs for parallel charging using xt90 connections charging board and imax charger the only thing im stuggling with is making the wiring look to plug them all into a series. Can anyone give me advice thanks
 

Chrisfinlayson

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Here is some information thst might help

they are lipolymer cells
 

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daromer

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Looks to be correct. You need to create the adaptors your self. Even better is to use 10s batteries and a 10s charger :)
 

Chrisfinlayson

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That is not mine its off a youtube video his is for 5x4s i want mine for 4x5s coul any body maybe spare 5mins to draw a diagram of how it would be wired on the loom and upload for me to make the loom I really dont want this to go wrong.

Attached is a picture of what happend when it went wrong

thanks alot
 

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Chrisfinlayson

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I was also wondering about the 20S BMS wire as that will be attached at all times to each cell tab... will this effect anything while i have the loom disconnected to parallel charge my packs?
For example will it still be joining all the cells together in series while the BMS is unplugged? As you can read full voltage from that connector

i wont be using the BMS to do any charging the battery pack will be took out and charged with the board pictured for a balance charge between the packs every time.
BMS Picture is random to show the cable
 

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Last edited:

daromer

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You need to disconnect it while paralelling it. You basically short it out. So its either or. Not both.
 

Chrisfinlayson

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What if I modify the bms wires? Would this work? It would mean i could disconnect them from the series connection with all the packs but will it still put threw the power to bms with these plugs?
 

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Chrisfinlayson

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And conveniently plug right into the balance board assuming it would be better and more convenient then using crimps and pulling off one by one
 

Chrisfinlayson

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You need to disconnect it while paralelling it. You basically short it out. So its either or. Not both.
I would disconnect from bms but i just dont know if the plug keeps them all together while unplugged failing that seperate the wires from the plug
 

Chrisfinlayson

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I have fell out with this idea with it possibly shorting all my packs with them being attached to bms plug. Need a plan B asap.
 
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