RU2483401C1 - Method for cycling of alkaline accumulator batteries and device for its realisation - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: electric energy is saved due to realisation of the proposed method - a special technology of simultaneous performance of charging-discharging modes with a single charging converter, additionally equipped with a system of calculation of boosting time t=C₃-C_p/I₃, comprising a division unit and a summator, one input of which is connected to a setter of charging capacitance, a subtracting input - to a counter of discharge capacitance, and an output - to one input of the unit of division of capacitance difference by the charge current value, to the second input of which a charging current setter is connected, and an output - to a timer for getting the time of charged battery boosting.

EFFECT: electric energy saving during cycling of alkaline accumulator batteries and reduction of equipment assortment for performance of charging-discharging cycles.

1 dwg

Description

The invention relates to the field of electrical engineering and can be used in the manufacture, commissioning, and scheduled repair and restoration work with batteries.

Known methods for conducting charge-discharge cycles of batteries when putting them into operation, scheduled repairs and the need to control the actual capacity that changes during operation. One of them is that the battery is connected in series to the charger, then to the discharge devices, or the battery is reversed with respect to the output of the charge-discharge converter. In this case, the discharge is performed with the recovery of the discharge energy into an alternating current network. In another method, the battery is discharged through a discharge current stabilizer to a load resistor (L1, L2).

A disadvantage of the known methods is the low use of the discharge energy of the battery and the appearance of higher harmonics in the network if it is discharged with recovery to the AC network, or a complete loss during discharge to the load resistor.

Closest to this invention in technical essence is a method of cycling batteries using only a charging converter while simultaneously charging one and discharging another battery, described in (L3), which is adopted as a prototype.

The disadvantages of this method include feasibility in the case of charging and discharging only acidic batteries, of the same type in capacity, since their charge and discharge currents are the same and equal to a ten-hour mode, i.e. 0.1 C _n

The essence of the invention lies in the fact that when connecting a series of counter-charged and discharged batteries to the charging converter, the value of the capacitance C _s , which must be reported to the charged battery, and the values of the charge current I _s and discharge I _p are set, the mode is carried out to the minimum allowable voltage of the discharged battery, calculating a value of electrical capacitance C _p discontinued dischargeable battery, it is subtracted from the capacitance value which is necessary to inform a rechargeable battery, the difference C _s -C _p divided by the charge current, Thu To receive the further mode of t = C _s C _p / I _s, is converted in the converter and the pause at the zero current value of the battery charge mode is turned off, and the charged and the charging current setting unit connected to the transducer and include a charge mode. In this case, the batteries may have different operating voltage. The only condition: the voltage of the discharging battery must be less than or equal to the voltage of the recharged. A positive effect of the invention is the saving of electrical energy when charging the battery due to 100% use of the energy of the discharged battery.

Batteries - secondary sources of electrical energy for normal operation require not only a primary charge, but also consecutive charge and discharge modes during the formation, commissioning and periodic repair and restoration work. Alkaline batteries are charged at a normal current of 0.25 C _n for 6 or 12 hours. During this time, they are informed of 1.5 or 3.0 of the nominal capacity C _n, respectively. The discharge is conducted with a current of 0.2 C _n .

The drawing shows a diagram of a device that implements the claimed method.

The device comprises a timer 1, a charge capacity adjuster 2, a division unit 3, an adder 4, a discharge capacity counter with a digital indicator 5, a discharge end control and control device 6, a charge current adjuster 7, a discharge current adjuster 8, a charge current stabilizer 9, to which a rechargeable 11 is connected through a current sensor 10 and discharged 13 batteries connected in turn through a disconnecting contact 12, and a closing contact 14 connecting a rechargeable battery to the output of the charging converter after disconnecting the discharged batteries.

The device operates as follows. A rechargeable battery 11 is connected to the converter 9 through a current sensor. In series with it, through the opening contact 12, a discharged battery 13 is counter-connected and the current value in the serial circuit is set by the discharge current regulator 8. The value of the capacitance removed from the battery is fixed by a counter 5, the inputs of which are continuously fed by a signal from the current sensor 10 and timer 1. The discharge is carried out until the end of the discharge is monitored by device 6. Device 6 disables the discharge current setter 8 and the discharge capacity count, the value of which remains on the digital indicator, puts the converter in the “pause” mode and opens contact 12. The signal from the output of the counter 5 is fed to the subtracting input of the adder 4. The second input of the adder 4 from the setpoint switch 2 receives the set of the initial value of the capacity required to charge the battery 11. The difference between the specified capacity C _s and taken from the discharged battery C _s is divided in the division unit 3 by the value of the charge current I _{s of the} battery 11 and is set in timer 1 time t = C _s -C _p / I _s until the end of battery charge 11. After setting the end time of the charge, timer 1 turns on terminal 14 and charge current adjuster 7. The battery 11 is charged for the time set by timer 1.

All the discharge energy of the battery 13 is used to charge the battery 11 with a 100 percent efficiency. Since the battery discharge time is always shorter than the charge time, the process is certainly feasible with saving electric energy. Cycling batteries is possible using only a charging converter. A dedicated bit converter is not required.

Information sources

1. Zorokhovich A.E., Belsky V.P., Eigel F.I. Devices for charging and discharging batteries. M. Energy. 1975, 208 pp.

2. Vailov A.M., Eigel F.I. Battery operation. Rostov on / D. 2009, 168 p.

3. Vailov A.M., Eigel F.I. Battery monitoring M., Energoatomizdat, 1992 (prototype p. 213-234), 288 p.

Claims (2)

1. The method of cycling alkaline batteries, which consists in the fact that a rechargeable battery is connected to a charging converter operating in the current stabilization mode, the capacitance value C _s required for its charge is set, a discharged battery is connected in turn through a switching contact, and carried out current regimen set point adjuster discharge current until the signs of the end of the discharge, the removed fixed value capacitance C _p, the converter is converted in the "pause" mode disable dischargeable battery discharge current and the dial, characterized in that in step closure subtracted from the original discharge mode set to a capacitance C _of a rechargeable battery removed capacitance value C _p, is divided difference C _of C _p value of the charge current I and the time _of carrying out the regime charge t = C _s -C _p / I _s until a message of a given capacity is connected, the rechargeable battery and the charge current controller are connected to the converter and the mode is carried out until the time t defined above t ends with the current value I _s set by the charge current controller. 2. The device according to claim 1, consisting of a charging converter-stabilizer of the current of the charging capacity setter, a current sensor, a power switching contact, a timer, a discharge capacity counter with a digital indicator, charge and discharge current setting devices, a device for monitoring the end of a discharge and control, characterized in that the dividing unit and the adder are additionally introduced into it, one input of which is connected to the charge capacity master, the subtracting input is to the discharge capacity counter, and the output is to one input of the capacity difference dividing unit by Inu charge current to the second input of which is connected the charging current setting unit, and an output - to a timer for obtaining time then charged rechargeable battery.