Method for measuring internal resistance of high-voltage battery pack based on multi-frequency mixed injection

Method for measuring internal resistance of high-voltage battery pack based on multi-frequency mixed injection

The invention discloses a method for measuring the internal resistance of a high-voltage battery pack based on multi-frequency mixed injection, and the method comprises the following steps: S1, outputting superposed mixed voltage signals, and outputting square wave signals which have the same freque...

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Hauptverfasser: HUANG JIYE, HU CHAO, YANG YUXIANG, GAO MINGYU, HE ZHIWEI, ZHANG XU, XU XUKUN, YU LIANG, LIN HUIPIN
Format: Patent
Sprache:chi ; eng
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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container_title
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creator HUANG JIYE
HU CHAO
YANG YUXIANG
GAO MINGYU
HE ZHIWEI
ZHANG XU
XU XUKUN
YU LIANG
LIN HUIPIN
description The invention discloses a method for measuring the internal resistance of a high-voltage battery pack based on multi-frequency mixed injection, and the method comprises the following steps: S1, outputting superposed mixed voltage signals, and outputting square wave signals which have the same frequency and phase with a single sine wave before synthesis one by one; generating a mixed current signal through a voltage-current conversion circuit; s2, carrying out high-voltage coupling processing on the mixed excitation signal source, and injecting the mixed excitation signal source into the high-voltage battery pack; and S3, amplifying a weak signal by using an amplifying circuit, extracting a small signal in a noise floor by using a synchronous detector, and controlling two analog switches by using a square wave signal. And after passing through the low-pass filter, the output voltage and the battery pure internal resistance have a direct proportion function relationship. S4, an ADC is used for collecting and ou
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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Method for measuring internal resistance of high-voltage battery pack based on multi-frequency mixed injection
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