SU1767589A1 - Method for determining chemical current source electric conductivity - Google Patents

Abstract

Use to control the parameters of chemical current sources, in particular electrical capacitance. Summary of Invention 1 The electrical capacitance of chemical current sources is monitored by measuring the voltage (IC) of a source under time load and comparing it with a calibration value for the UK f (C) curve. A chemical current source is loaded with a resistance of 10 ohms, and after 5–20 s, the value of its voltage (UK) is measured, the value of which determines the electrical capacitance of chemical current sources. The construction of the calibration curve and testing of the HIT are performed at the same temperature. 2 Il.

Description

The invention relates to a measuring technique and can be used to control the electrophysical parameters of chemical current sources, in particular energy intensity.

There is a known method of controlling the capacity of a battery by controlling the discharge current by means of the PL-indication element, which is described. The method has a low accuracy control of electrical capacity and a complex design of the device that implements the method.

There is also known a method for controlling the electrical capacitance of chemical current sources (HIT) by LED indication of a voltage drop across a capacitor in open-load circuit mode 2. This method has a low measurement stability, low control accuracy, and a complex design of the device that implements the method.

The prototype of the present invention is a method for controlling the electrical capacitance of chemical current sources 3

In the prototype method, the electrical intensity of chemical current sources (HIT) is determined as follows. The battery voltage is read when the load circuit is open, which is then remembered. The voltage on the HIT is read when electric current flows through it in the first direction. The value of the read voltage is compared to the amount of the memorized initial voltage to obtain the difference value first direction. The value of the storage voltage is then adjusted depending on the difference value for the half-pupil of the adjusted voltage value having a connection with the current of the first direction. According to the obtained adjustment, XI | 0s

S cl

00

:

The voltage value is estimated by the electrical capacitance of the HIT.

The disadvantages of the prototype:

1. Low measurement accuracy of HIT electrical capacitance due to the formation of the adjusted voltage value at the transient flow stage.

2. Significant hardware layer implementing the method, including sophisticated digital measuring equipment.-11

The goal and the invention is to simplify and improve the accuracy of measuring the electrical capacitance of chemical current sources.

This goal is achieved by the fact that in the method of determining the electrical capacitance of a chemical current source by measuring the voltage at the source terminals under load and comparing it with the calibration value on the UK f (C) reference curve obtained at a certain HIT temperature, load HIT on active resistance of 10 ohms and after 5-20 s is measured, of course, its voltage (IR), the value of which determines the value of the electrical capacity of the source, and testing the HIT is carried out at a temperature corresponding to eraturnomu mode calibration curve.

Due to the fact that, in the proposed method, the electrical capacitance of chemical current sources is controlled by connecting a 10 Ω resistive load to their external terminals, measuring the final voltage in 5–20 s and comparing it with the calibration value UK f (C), the goal is achieved — greatly simplified the technique and the accuracy of the measurement of electrical capacitance is increased. The error in the measurement of electrical capacitance is reduced. more than 4 times, from 95 (in the prototype) to 20%.

The electrical intensity of chemical current sources (HIT) is determined by the proposed method using a device whose circuit is shown in FIG. one.

Using contact group 1, the active load resistance 3 with a rating of 10 Ω is connected to a chemical source 2, to which a high-precision high-resistance measuring voltmeter 4 is connected in parallel, after a predetermined time of 5-20 s with a voltmeter 4, the final voltage value U HIT 2. Interval 5–20 s, during which the chemical source 2 currents, in the process of determining the electrical capacity, are loaded to the active resistance, 10 ohms, was chosen experimentally in order to obtain the optimum sensitivity for the chemical their current sources of different electric capacity and minimum loss of electrical capacity at measuring discharge. In this case, with an increase in the electric capacitance of the HIT, the time interval increases.

Choose chemical current sources

specified type with tested value

electric capacitances in the range of values (0,5,10,15,

20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80,

85.90.95, 100)%.

For each specific value of the tested electrical capacity HIT, the final value of the voltage of the HIT loaded at 10 ohms in a given time interval is determined

Build a reference calibration curve (Fig. 2) according

UK f (C).

The final voltage value of the controlled chemical current source is compared with the value on the reference calibration curve, as a result of which the exact value of the electric capacity of the controlled HIT is determined,

The sequence of operations is as follows.

1. Chemical Current Source 2, for example, galvanic cells of the SC21 type,

The SC57-for powering the electronic clock is connected via the contact group 1 of the electronic switch (not shown in Fig. 1) to the active load resistance 3 of 10 ohms. After 10 s

A high-precision voltmeter 4 (pointer or electronic) measures the value of the final voltage UK.

2. Compare the value of the voltage UK with the calibration value on the reference

the curve depicted in FIG. 2

3. According to the results of comparison, they determine the exact value of the electric capacitance of chemical current sources,

The accuracy of the electric capacitance measurement by the device that implements the proposed method is 18–20%.

Claims (1)

Claim Method for Determining Electrical Capacity chemical current source by measuring the voltage at the source terminals under load over time and comparing it with the calibration value on the standard curve UK f (C) obtained at a specific HIT temperature, characterized in that, to simplify and improve accuracy, HIT is loaded on active resistance of 10 ohms and after 5-20 s is measured its final voltage UK, according to the value of which the value of the electrical intensity of the source is judged, and the HIT is carried out at a temperature corresponding to the temperature regime of the calibration curve. V: O 20 40 60 30 fffff C}% 1 Fig1