New battery cells

those who know their way would write that the samsung 50 S is suitable in very high numbers for trike or for ultra-light thermal concepts up to a maximum of 9 kilowatts of starting power.

the samsung 50 S is unsuitable for eppg standard with a typical 3-4 kilowatt battery size because it is constantly hot and only has 70% capacity after only 20 cycles … :wink:

my posting in facebokk refers to pure thermal concepts with 9 kilowatts of starting power and are mainly used with a maximum of 6 kilowatts in the climb or with 3 kilowatts in the level.
the concept is the apco kitto with a folding propeller without a cage and a 15 S / 10 P battery.

total weight 18.7 kilograms including rescue parachute. with the trike s i see a minimum of 15 S 40 P so that the cells in the housing do not overheat. the samsung 50 s is not a miracle cell for the standard.

you can only use it if the concept is coordinated for it. otherwise it is currently better to stay with the well-known 21700 with around 4000 mah.

It is comparable to the sony VTC 5 and VTC 6:

when the vtc 6 was used for the first time in the same number of units as the vtc 5, there were temperature problems because the total amount of heat that is given off was around 20% more when the sony vtc 6 came the battery at its temp limit by longer running time. only when the internal resistance, and thus the efficiency of the cells, is better, more capacity can also be implemented directly.

At the moment, the withdrawal often has to be reduced or the number of cells increased in the case of cells with more capacity and the same weight and size.

It is important to mention that the samsung 50 s cannot be bought by hobby people. therefore i think it will take another 1-2 years until the molicell and sony / murata in the 5ooo class is available for special eppg applications.

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