rcaddict Posted March 23, 2017 Share Posted March 23, 2017 would it be ok to put 2 lipos of equal capacity in parallel even if they are different brands Quote Link to comment Share on other sites More sharing options...
Bob Burton Posted March 23, 2017 Share Posted March 23, 2017 Yes, as long as their voltages are reasonably well matched. Quote Link to comment Share on other sites More sharing options...
MattyB Posted March 23, 2017 Share Posted March 23, 2017 They do not even have to be of the same capacity - just the same cell count and a similar C-rating. Quote Link to comment Share on other sites More sharing options...
rcaddict Posted March 24, 2017 Author Share Posted March 24, 2017 cool - this is good news Quote Link to comment Share on other sites More sharing options...
Chris Freeman 3 Posted March 24, 2017 Share Posted March 24, 2017 Keep the flight times a little shorter in the beginning as 1 pack will have higher draw than the other, can be quite a lot if the match is not good. The stronger pack will have a higher utilisation. Quote Link to comment Share on other sites More sharing options...
Charles Pic Posted March 24, 2017 Share Posted March 24, 2017 If more current is being drawn from one pack than the other, wouldn't the voltage of that pack want to reduce more quickly, leading to a balancing current travelling from the other pack (since they are joined in parallel with low resistance cable?) in other words, while joined in parallel, the load must be shared between the batteries in proportion to their capacities, as capacity defines how quickly the voltage decays while current is being drawn? Quote Link to comment Share on other sites More sharing options...
Chris Freeman 3 Posted March 24, 2017 Share Posted March 24, 2017 I thought so too untill I ruined a new pack which was paired with an older one. Quote Link to comment Share on other sites More sharing options...
MattyB Posted March 24, 2017 Share Posted March 24, 2017 Posted by Charles Pic on 24/03/2017 12:40:51: If more current is being drawn from one pack than the other, wouldn't the voltage of that pack want to reduce more quickly, leading to a balancing current travelling from the other pack (since they are joined in parallel with low resistance cable?) in other words, while joined in parallel, the load must be shared between the batteries in proportion to their capacities, as capacity defines how quickly the voltage decays while current is being drawn? In principle you are correct, but the condition of the batteries and ability to deliver current is significantly different you can have issues, especially if you are discharging to a low SOC (i.e. less than ~30% left in battery at the end of the flight). Quote Link to comment Share on other sites More sharing options...
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