国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

Aiming at the problem of lead-acid battery internal resistance is small,large current discharge of battery damage too large and the signal of small current discharge is too small,proposes a new method,small current secondary discharge ,to test the internal resistance of battery . The two discharge circuit is composed of switch combination and precision high stability power resistance,two small current discharge in the role of the controller.Collected the voltage of the two discharge resistor through the sample and hold device during the two discharge process,two discharge voltage difference by ultra low offset drift amplifier ICL7650 amplification,by two discharge resistor terminal voltage and the difference,in order to achieve battery internal resistance measurement. The experimental data show that the two small current discharge measuring battery internal resistance and large current discharge measuring battery internal resistance is consistent with the result,the method can realize online detection of battery internal resistance.