電流不夠....引至電壓下降.....再引至電壓保護打開.....
A123/Li-fe....幾多ma....幾多c
xxxx ma X xxC =xxA
i.e. 2200ma =2.2A X 15C =33A
計算一吓是否不夠???
A123/Li-fe 其實不怕過放 所以可以不用 ...
Yes.. that maybe another possibility: A123/Li-fe has a lower operating voltage than Lipo (e.g. 4s A123 = 3.5s Lipo), so if the ESC set "Low Voltage Protection", ESC may sense 5S A123 as "5S Lipo" and cut at high current (e.g. full throttle) while battery voltage drop a bit.
A123 can resist Low voltage of 1V, and normally capacity used up at around 2.5V. So set your LV protection lower should solve the problem...
Hehe... it is a good news to you... the true strength of your car not reached yet... you can use 5S LiPo... this should be your TRUE LIMIT!!!WOW
so after Lipo cut-off switched off, running with A123 5s is smooth, no more previous problem?
5 cell lipo= 4.2x5 = 21V ; 6 cell A123 = 21.6V ; can ESC handle this extra 0.6V....need to test (risk of burning ESC?)... or set a limit of charging to 21V only...
A123 is standardized as 30C....2200mah X 30C -> 66A (over this, temporily ok, just shorten battery cycle life) Even if you use 6 cell A123, Design 電流 limit is still 66A, no change. i.e. not the limit of your ESC yet!haha..
In comparison, 5 cell li-po,30C 4000mah -> 120A (or better 5 cell li-po,30C 5500mah -> 165A).... This should be a good match of ultimate performance...