SU743083A1 - Device for testing storage battery capacity - Google Patents

Description

The aim of the invention is to increase the accuracy of monitoring the capacity of the battery.

This is achieved in that the device for monitoring the capacity of the battery is inserted by a self-discharging current sensor connected to the power circuit of one of the integrating motors through the corresponding contacts of the switching unit.

The self-discharge current sensor contains a temperature-dependent element, such as a thermistor.

Accounting for the loss of battery capacity from self-discharge at various ambient temperatures contributes to an increase in the accuracy of battery capacity monitoring.

The drawing is a diagram of a device for monitoring battery capacity.

A device for controlling the capacity of a battery consists of a counter 1 ampere-hour, containing electric motors 2 and 3, kinematically associated with differential 4, on the output axis 5 of which a window disk 6 is fixed, controlling a photo-reading element 7, the output of the latter is connected through a driver 8 pulses with a reversible counter 9, a self-discharge current sensor 10, a shunt 11 connected to the circuit of the battery 12, a switching unit. 13, connected by its input to the shunt 11 and the self-discharge current sensor 10, and the output to the control circuit of the reversal of the counter 9, an additional power source 14 connected in parallel to the electric motor 2 and 3. In addition to the electric motor 2 in series with the power source 14 c The shunt 11 and the self-discharge current sensor 10 are turned on using the contacts of the output relay of the switching unit 13.

The device works as follows.

With the start of the charge of the battery 12 on the shunt 11, a voltage drop proportional to the charging current in the polarity opposite to the voltage on the current sensor 10 from the battery charge appears. The shunt 11 and the self-discharge current sensor 10 by the contacts of the output relay of the switching unit 13 are connected to the electric motor 2 circuit so that the total voltage on the electric motor 2 is equal to the voltage difference of the power supply source 14 and the differential voltage on the series-connected shunt 11 and the sensor 10 current self-discharge yes.

At the same time, the angular velocities of the electric motors 2 and 3 have a different magnitude and the output axis 5 of the differential 4 acquires an angular velocity proportional to the difference of the voltages

on shunt 11 and self-discharge current sensor 10. A disk 6 with Windows is connected to the axis 5 and controls the photo-reading element 7. The latter, through the pulse shaper 8, begin to deliver pulses to the counter 9 with a frequency proportional to the output axis 5 of the differential 4.

If the charge current exceeds the self-discharge current of the battery, and, therefore, the voltage across shunt 11 is greater than the voltage of the self-discharge current sensor 10, then the differential voltage of the series-connected shunt 11 and the self-discharge sensor 10 goes to the input of the switching unit 14 in such a polarity that the relay of the switching unit 13 connects the counter 9 to the driver 8 to add the pulses arriving at its input.

Thus, the frequency of the pulses arriving at the input of the counter 9 is proportional to the difference in currents 1 and the battery self-discharge, and the number of pulses sent to the counter 9 ea is determined by the time interval proportional to the capacity received by the battery. As the direction of the shunt 11 changes (when the battery is discharged), the voltage drop across the shunt 11 folds with the voltage of the self-discharge current sensor 10 and enters the input of the switching unit 13 in such a direction that the output relay of the switching unit 13 connects counter 9 to the former 8 to subtract the pulses arriving at its input. At the same time, the shunt 11 and the self-discharge sensor 10 with the contacts of the output relay of the switching unit 13 are connected to the electric motor 2 circuit so that the total voltage on the electric motor 2 is equal to the difference in the voltage of the power supply source 14 and the total voltage of the current shunt 11 and current sensor 10 samrazr yes.

If there is no charge - discharge of the battery (voltage drop on shunt 11 is zero), the frequency of pulses arriving at the input of counter 9 is proportional to the current, self-discharge aa cumulator battery, and the output relay of switching unit 13 connects counter 9 to driver 8 to subtracting incoming pulses at its input.

When powering the self-discharge current sensor 10 / e.g. from the battery to be tested, its output voltage should be proportional to the sum of the self-discharge current of the battery and the current it consumes from the battery.

Thus, the introduction into the circuit of one of the electric motors of the sensor 65 of the current of the self-discharge of the battery

Claims (1)

Claim A device for monitoring the capacity of the battery, containing a power source, a photo sensing element connected through a pulse shaper, with a reversible counter controlled by a switching unit connected to a shunt in the battery circuit, an additional power supply unit integrating an amp-hour meter, consisting of two integrating electric motors, kinematically connected to each other through a differential, on the output axis of which a disk is mounted, I control the 5th photo-sensing element, both of which are electric motors By connecting to an optional power supply, and one of them through the switching of the output relay contacts Block 10 is connected to the shunt of m and n sistent in that, in order to increase the accuracy of control, it is provided with self discharge current sensor included kontak.- you through said output switching relay unit ^E to said engine.