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I want to supply all my circuit boards with one lipo battery. The design is like this. enter image description here

I need a battery connector cable. So, I made my own battery Y-cable like this.

enter image description here

I use XT-90 connector to connect to lipo battery and xt-60 connector for 3 boards. When I connect my vaccum motor, it couldn't run the motor. Is there any problems in the cables? I use 12AWG for XT-90 Connector and 16AWG for XT-60 connector. Is there any connector for this use?

Is the resistance from all wire and connector caused the problem that cannot turn on motor?

The battery is onbo Lipo 6s 22.2 v 22000mAh 25C

Thanks all.

Converter for Vacuum Motor
Converter for Up Board
Converter for controller board

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  • \$\begingroup\$ what's the max current your battery can provide? I see about 17A that it needs to provide if everything is on (not accounting for conversion losses). \$\endgroup\$ – ratchet freak Jun 7 '18 at 12:20
  • \$\begingroup\$ Lipo battery can provide 22A for one hour. And it have 25C discharge rate. \$\endgroup\$ – Daniel Phyo Jun 7 '18 at 12:23
  • \$\begingroup\$ Basically a duplicate of : electronics.stackexchange.com/q/378525/152903 \$\endgroup\$ – Solar Mike Jun 7 '18 at 12:24
  • \$\begingroup\$ @SolarMike I cannot turn on the motor. I haven't put the fuses in the circuit yet. \$\endgroup\$ – Daniel Phyo Jun 7 '18 at 12:26
  • \$\begingroup\$ What step-down converters have you used? Please provide a data sheet link for the battery. \$\endgroup\$ – Andy aka Jun 7 '18 at 12:27

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