This is my new project for a copters powered from several batteries. It is a intelligent battery switcher whitch include support for 3 or more batteries.
Features:
- ON/OFF switch (it is no longer necessary disconnect your battery after flight)
- Measurement of voltage and current for each battery
- Switching between batteries during discharging:
> Automatic mode ( according to consumed voltage and current )
> Manual switch (local or remote controlled by RC)
- No parallel connection of batteries
- Buzzer for last Battery alarm
- Led signalisation
- Serial data monitoring
- FailSafe mode
HW is finished at the moment and I am working on FW.
mobiDrone inteLi Power
Re: mobiDrone inteLi Power
Does it weigh less than 0.5kg?
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Re: mobiDrone inteLi Power
timecop wrote:Does it weigh less than 0.5kg?
Hi,
good question but I'm sure that the weight is less than 100 g.
Re: mobiDrone inteLi Power
I'd be interested to know where you found relays capable of switching 50A+ current for < 100grams each
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Re: mobiDrone inteLi Power
timecop wrote:I'd be interested to know where you found relays capable of switching 50A+ current for < 100grams each
Relays , you are funny man ,but thank you for your interrest. Its based on BTS555 power switch .
Re: mobiDrone inteLi Power
Sounds interesting. How do you plan to provide power to the copter during switching ? (according to datasheet,worst case scenario : 220uS to switch off batt1, 550uS to switch on batt2) You need a big capacitor........
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Re: mobiDrone inteLi Power
EOSBandi wrote:Sounds interesting. How do you plan to provide power to the copter during switching ? (according to datasheet,worst case scenario : 220uS to switch off batt1, 550uS to switch on batt2) You need a big capacitor........
Personally, I power the electronics via the balance plug. That could be an option but I don't have a clue how Micheal is doing it.
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Re: mobiDrone inteLi Power
EOSBandi wrote:Sounds interesting. How do you plan to provide power to the copter during switching ? (according to datasheet,worst case scenario : 220uS to switch off batt1, 550uS to switch on batt2) You need a big capacitor........
During switching two batteries will be connected simultaneously (very shor time) to prevent copter before power-hungry situation.
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Re: mobiDrone inteLi Power
Micheal, please entertain this question, I don't understate the need to switch batteries that power the main motors if the batteries are wired Parallel.
Re: mobiDrone inteLi Power
copterrichie wrote:Micheal, please entertain this question, I don't understate the need to switch batteries that power the main motors if the batteries are wired Parallel.
There is one possible benefit. You can use batteies with different capacities.
You can use different sized batteries in parallel anyway (assumed they have the same cell count) but you will get a quite significant penalty on the larger one.
I don't see any other benefits.
I would rather would like to see a device which measures and logs individual cell voltages during flight. So I can spot dying or defective cells before it impacts overall performance. (Think about a dual 6S setup, when you have to measure 12 cells)