RU2089015C1 - Method for determining frequency characteristics of battery power supply sources - Google Patents

Method for determining frequency characteristics of battery power supply sources Download PDF

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RU2089015C1
RU2089015C1 RU95109340A RU95109340A RU2089015C1 RU 2089015 C1 RU2089015 C1 RU 2089015C1 RU 95109340 A RU95109340 A RU 95109340A RU 95109340 A RU95109340 A RU 95109340A RU 2089015 C1 RU2089015 C1 RU 2089015C1
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voltage
battery
current
frequency characteristics
method
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RU95109340A
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RU95109340A (en
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В.С. Князев
А.Я. Лысцов
В.А. Лысцов
В.А. Мыльников
Е.В. Пугачев
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Сибирская государственная горно-металлургическая академия
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/16Spectrum analysis; Fourier analysis
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

Abstract

FIELD: electrical and radio engineering. SUBSTANCE: nonsinusoidal voltage and current applied to battery are recorded and expanded into harmonic Fourier series. Complex resistances of battery for each harmonic, their active and reactive components are found by values of amplitudes and starting phases of harmonics of voltage and current. Due to frequency characteristics of chemical source of electric energy it is possible to know serviceability of energy sources, their technical condition, degree of charging, and to realize synthesis of systems of automatic control by process of charging. EFFECT: increased accuracy of determining the amplitude- and phase-frequency characteristics of all types of storage batteries in wide ranges of frequencies. 2 dwg

Description

Изобретение относится к электротехнике, в частности к эксплуатации аккумуляторных батарей. The invention relates to electrical engineering, in particular to the use of the battery.

Знание частотных характеристик химических источников тока (ХИТ) позволяет судить о работоспособности источников тока, техническом состоянии, степени заряженности, выполнять синтез систем автоматического управления процессом заряда. Knowledge of the frequency characteristics of chemical current sources (CCS) gives an indication of the current sources of efficiency, condition, state of charge, to perform automatic control of the charge synthesis process systems.

Известны различные способы исследования частотных характеристик аккумуляторных источников питания, в частности путем определения активных и реактивных составляющих ее полного внутреннего сопротивления из условия равенства передаточных функций моделирующей установки и математического выражения полного внутреннего сопротивления батареи в операторной форме [1] Various methods for the study of the frequency characteristics of battery power sources, in particular by determining the active and reactive components of the impedance it from the condition that transfer functions and simulates installing the mathematical expression for total internal resistance of the battery in operator form [1]
Недостатками способа являются малая точность из-за субъективности оценки совпадения переходных характеристик модели и батареи и большое время, затрачиваемое на определение параметров. The disadvantages of this method are low accuracy due to the subjectivity of assessment coincidence transient response model and a large battery and the time required to determine the parameters.

Наиболее близким к изобретению по технической сущности и достигаемому результату является способ определения амплитудно-частотных и фазочастотных характеристик ХИТ на основании измерения амплитуд и сдвига фаз синусоидального тока фиксированной частоты в аккумуляторе и напряжения на его клеммах [2] При этом ток, формируемый генератором синусоидального тока с регулируемой частотой, пропускают через ХИТ. The closest to the invention by the technical essence and attainable result is a method for determining the amplitude-frequency and phase-frequency characteristics HIT by measuring the amplitude and the offset of fixed frequency sinusoidal current phases in the battery and the voltage at its terminals [2] where the current generated by the generator sinusoidal current with variable frequency is passed through the HIT. Переменное напряжение, измеряемое на клеммах ХИТ как отклик на воздействующий ток, подают на специальное измерительное устройство, состоящее из блоков измерения амплитуды и измерения сдвига фаз между напряжением и током. The alternating voltage measured at the terminals in response to the HIT actuating current is supplied to the special metering device consisting of a shift of the amplitude and phase measuring units of measurement between voltage and current.

Для осуществления указанного способа требуется генератор сложной конструкции с целью обеспечения строго синусоидального тока 0,1 10 А различной частоты (0,01 1000 Гц), включающий генераторы напряжений прямоугольной и треугольной формы, формирователь синусоидального напряжения и источник тока, управляемый напряжением. To implement this method requires complicated design generator to provide a strictly sinusoidal current 0.1 to 10 A varying frequency (0.01 to 1000 Hz), comprising a rectangular voltage generator and the triangular sinusoidal voltage generator and a current source controlled by voltage. Для измерения переменного напряжения на клемме аккумулятора необходимы приборы высокой чувствительности при ограничении пропускаемого через аккумулятор тока допустимой плотностью. To measure the alternating voltage on the battery terminal devices requires high sensitivity by limiting throughput allowable current density of the battery.

Способ практически применим для исследования частотных характеристик аккумуляторов малой емкости, так как реализация его при снятии характеристик источников большой емкости и повышенного напряжения, например, тяговых аккумуляторных батарей, требует создания генераторов синусоидального тока большой мощности с большим диапазоном частоты. A method virtually applicable to study the frequency characteristics of the small-capacity battery, since the implementation of its characteristics when removing sources large capacity and high voltage, for example, traction batteries requires the creation of high power sinusoidal current generator with a large range of frequencies.

Задача изобретения повышение точности определения амплитудно-частотных и фазочастотных характеристик всех типов аккумуляторов (включая тяговые аккумуляторные батареи) в широком диапазоне частот при упрощении конструкции измерительного устройства. Object of the invention increase accuracy of determination of the amplitude-frequency and phase-frequency characteristics of all types of batteries (including traction batteries) over a wide frequency range while simplifying the construction of the measuring device.

Сущность изобретения состоит в том, что в способе определения частотных характеристик аккумуляторных источников питания фиксируют несинусоидальные приложенные к батарее напряжение и ток в ней и, разлагая их в гармонический ряд Фурье, по значениям амплитуд и начальных фаз гармоник напряжения и тока определяют комплексные сопротивления батареи для каждой гармоники, их активные и реактивные составляющие. Summary of the invention consists in that in the method of determining the frequency characteristics of the rechargeable power supply is fixed sinusoidal voltage is applied to the battery and current in it, and expanding them in harmonic Fourier series, complex resistance of the battery is determined by the values ​​of the amplitudes and initial voltage harmonics and current phase of each harmonics, their active and reactive components.

Сравнение предлагаемого изобретения не только с прототипом, но и с другими техническими решениями не позволило выявить в них признаки, отличающие предлагаемое решение от прототипа, что позволяет сделать вывод о его соответствии критерию охраноспособности "изобретательский изобретательский уровень". Comparison of the present invention not only with the prototype, but also with other technical solutions are not allowed to reveal to them the signs that distinguish the proposed solution to the prototype that allows making a conclusion about its compliance with the criteria of patentability "inventive inventive step".

На фиг. FIG. 1 представлена структурная схема устройства для реализации способа; 1 is a block diagram of an apparatus for implementing the method; на фиг. FIG. 2 кривые изменения напряжения и тока при питании аккумуляторной батареи от генератора прямоугольных импульсов. 2 the curves of voltage change and a current when the battery is powered by a generator of rectangular pulses.

Устройство содержит источник периодического несинусоидального напряжения 1, аккумулятор с последовательно соединенным безиндуктивным резистором 2, аналого-цифровой преобразователь (АЦП) 3 с двумя входами, на которые подаются ток в аккумуляторе и напряжение на нем, электронную вычислительную машину 4. The apparatus comprises a periodic non-sinusoidal voltage source 1, a battery with a series connected non-inductive resistor 2, analog-to-digital converter (ADC) 3 with two inputs to which a current supplied to the battery and the voltage across it, the electronic computer 4.

Сущность способа определения частотных характеристик аккумуляторных источников питания заключается в следующем: The essence of the method for determining frequency characteristics of rechargeable power sources is the following:
На исследуемый аккумулятор с последовательно включенным образцовым резистором 2 подают периодическое несинусоидальное напряжение от генератора. In the battery with the analyzed sequentially switched exemplary resistor 2 is supplied from a periodic non-sinusoidal voltage generator. В качестве такого генератора может быть применен, например, генератор прямоугольных импульсов (типа Г 5-6А). B may be applied, for example, a rectangular pulse generator (type D 5-6a) such as a generator. Напряжение на безиндуктивном резисторе пропорционально току в аккумуляторе. The voltage at the non-inductive resistor is proportional to the current in the battery. Аналого-цифровой преобразователь с двумя входами или два преобразователя (типа Ф 422) через равные промежутки времени измеряют ток в аккумуляторе и напряжение на его клеммах. Analog-to-digital converter with two inputs or two transmitters (type F 422) at regular intervals measure the current in the battery and the voltage at its terminals. Например, питание аккумуляторной батареи можно осуществлять от генератора прямоугольных импульсов. For example, battery power may be performed by a generator of rectangular pulses.

Возможно применение специального генератора, обеспечивающего форму напряжения с широким спектром высоких гармоник. Possible to use a special generator providing voltage waveform with a wide range of higher harmonics.

Измеренные несинусоидальные ток и напряжение, например, с помощью компьютера 4 раскладываются в ряды Фурье Measured sinusoidal current and voltage, for example, using the computer 4 are expanded in Fourier series

Figure 00000002

По найденным значениям амплитуд тока I mk , амплитуд напряжения U mk и начальным фазам (ψ , ψ ) для отдельных номеров К гармоник ряда вычисляют комплексные внутренние сопротивления аккумулятора For the resulting current amplitude value I mk, voltage amplitudes U mk and initial phases (ψ Ik, ψ Uk) to separate numbers of harmonics K calculated complex number battery internal resistance
Figure 00000003

По комплексным сопротивлениям получают амплитудно-частотные и фазочастотные характеристики аккумуляторных источников питания. As complex impedances obtained amplitude-frequency and phase-frequency characteristics of rechargeable power sources.

В отличие от прототипа в предлагаемом способе отсутствует необходимость в генераторе строго синусоидального тока с регулируемой частотой, вследствие чего повышается точность определения частотных характеристик аккумуляторов, уменьшается время, затрачиваемое на проведение эксперимента и обработку результатов, появляется возможность использования этого способа в автоматизированных системах диагностики аккумуляторных батарей. Unlike the prior art in the present process is not necessary in the generator strictly sinusoidal current with variable frequency, thereby increasing the accuracy of determining the frequency characteristics of the battery, it decreases the time spent in the experiment and processing the results, it is possible to use this method in automated batteries diagnostic systems.

Проведенные исследования различных типов аккумуляторов подтвердили возможность использования предлагаемого способа для получения частотных характеристик и оценки технического состояния, степени заряженности и работоспособности аккумуляторных батарей. Studies of various types of batteries have confirmed the possibility of using the proposed method to obtain the frequency characteristics and evaluation of technical state of charge and health of batteries.

Claims (1)

  1. Способ определения частотных характеристик аккумкуляторных источников питания путем изимерения напряжения и тока батареи, отличающийся тем, что на аккумулятор подают несинусоидальное периодическое напряжение и через равные интервалы времени измеряют ток и напряжение с помощью аналого-цифрового преобразователя, а затем осуществляют разложение тока в аккумуляторе и напряжение на нем в гармонический ряд Фурье, по значениям амплитуд напряжения тока и начальных фаз определяют комплексное внутреннее сопротивление аккумулятора для отде A method for determining frequency characteristics akkumkulyatornyh power sources by izimereniya voltage and current of the battery, characterized in that in the battery is fed non-sinusoidal periodic voltage and at regular time intervals measure the current and voltage via the analog-digital converter, and then carry out expansion battery current and voltage at it harmonic in the Fourier series, the values ​​of the current and initial phases of voltage amplitudes define complex internal battery resistance for otde ьных частот и получают амплитудно-частотные и фазочастотные характеристики. nyh frequency and receive amplitude-frequency and phase-frequency characteristics.
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