A calibration method for the initial value of the internal resistance of the battery pack of the pitch system

Abstract

The invention discloses a method for calibrating internal resistance initial value for a pitch system battery pack. The method comprises following steps: (1) setting an internal resistance reference value Rref as a preset internal resistance value Rpara; (2) constantly detecting current internal resistance value Rtest of the battery pack during the operation of the pitch system; (3) setting the current internal resistance value Rtest as the internal reference value Rref if the obtained current internal resistance value Rtest is less than the internal resistance reference value Rref; (4) repeating step (2) to (3), when the obtained current internal resistance value Rtest is larger than or equal to the internal resistance reference value Rref, the internal resistance reference value Rref is not set as the current internal resistance value Rtest, the internal resistance reference value Rref at the moment is the internal resistance initial value. According to the calibration method disclosed in the invention, the internal resistance reference value Rref is constantly updated not always by use of the preset internal resistance value Rpara but according to the current internal resistance value Rtest of the battery pack, so that the internal resistance initial value is as accurate as possible, and in this way, the battery pack health status obtained by comparing the current internal resistance value of the battery pack with the internal resistance initial value is more accurate.

Description

technical field [0001] The invention relates to the field of internal resistance detection of a pitch system battery pack, in particular to a calibration method for an initial value of the internal resistance of a pitch system battery pack in the field. Background technique [0002] Electricity is an indispensable form of energy in daily production and life. Traditional thermal power generation not only consumes a large amount of fossil resources, but also emits a large amount of greenhouse gases; although nuclear power generation does not emit greenhouse gases, it is very dangerous. Once an accident occurs, it will cause irreversible damage to the environment. Therefore, countries in recent years We have been vigorously developing clean energy represented by wind power generation. [0003] At present, the wind rotors of mainstream wind turbines are all in the form of hubs and blades. In order to ensure the constant speed rotation of the wind rotor and realize emergency fea...

AI Technical Summary

Problems solved by technology

[0004] The battery manufacturer will provide the internal resistance value of a certain batch of batteries in the initial state. The internal resistance value is a theoretical value or a value that is actually measured in the test and is applicable in most cases. However, due to the consistency of battery production There are differences, and different batches of batteries will also have differences. There is a large error in the internal resistance value in such an initial state. Comparing the current internal resistance of the battery with the internal resistance in the initial state of the battery cannot accurately obtain the internal resistance of the battery. health status

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