SU716109A1 - Storage battery charging-discharging device - Google Patents

Description

(54) DEVICE FOR CHARGING AND DISCHARGING BATTERY BATTERY

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The invention relates to electrotechnical engineering and can be applied in testing, forming and charging batteries.

Charging devices are used, which are used for cycling battery batteries, and are implemented on a basis of thyristor converters, which work on charging batteries in a rectifying mode, and when they are discharged in an inverter mode. Ptrc increased cycling frequency current reversal from charge to discharge, it is advisable to 6; not contact reversive mrsta at the output of the device, as using a converter, performed on counter-pair-parallel thyristor pairs 1.

Dp power on the order of several kilowatts of output voltage of the order of ten volts such devices should be carried out on the basis of single-phase half-bridge rectifier-inverter 1211P converters.

A disadvantage of the known devices is the poor use of the secondary windings of the transformer along the current.

The prototype of the device is a converter made on the basis of a single-phase transformer.

with two according to the connection “1 second half-windings, the common connection point of which forms one output terminal of the device, and the second output mode of the device is formed by the common point of the connection of the opposite-pair pairs. The tori connected by their other anodaccats and cathodes through the windings burned Mwakadego Drossel. to the free end and the beginning of the specified secondary windings of the transformer 4 ..

The drawback of the device is the high installed power of the equipment due to the operation of the secondary half windings of the transformer in a single-step mode.

A: The purpose of the invention is to reduce the installed power of the equipment by the calculated power of the transformer.

This is achieved (by the fact that the device is equipped with two additional output terminals, and the half of the winding of the transformer is made electrically separated, with the beginning of one

The windings are connected to the end by the other through anti-parallel thyristor pairs, and two pairs of output terminals of the device are connected through the windings of the choke to the beginnings and ends of the said half-windings of the transformer, respectively.

The drawing shows a schematic diagram of the proposed device.

The device contains a transformer 1 with secondary semi-windings 2 and 3, thyristors 4-7, windings Drossel 8 and 9 and works on the battery 10 and 11.

The PSs of the windings 2 and 3 of the transformer 1 are made of electrically separated anti-parallel pairs of thyristors 4 and 5, and b and 7, connected between their adjacent beginnings and ends, and the safety terminals of the device for connecting batteries 10 and 11 are connected to the beginnings and the ends are indicated from the semi-transformer of the transformer through the windings Drossel 5 and 8 / respectively.,

. Direct alternate supply of control pulses To thyristors 4 and b with a phase shift in 180 devices, it operates in a rectifying mode, providing in one half period the charge of the battery 10 on the circuit: (Semi-winding 2, thyristor 4, winding drossel 9, and The charge of the battery 11 on the circuit: choke 8, thyristor 4, half winding 3, and in the other half-period of the supply voltage charge of the multiplier battery Yu on the circuit: thyristor b, half winding 3, winding drossel 9, and battery 11 by Circuits: thyristor b, semi-winding 2transformer G, obmbtka drossel eight.

 Drossel 8 and 9 provide the smoothing of the charge current to the required level and waving. on the general magnetic conductor

When switching from charge to discharge, the control pulses are removed from thyristors 4 and b and fed to thyristors 5 and 7, changing the direction of current flow in the aforementioned circuits. In this case, the device operates in the Invert current mode of the batteries in the supply mains. ; ---- The magnitude of the charge and discharge currents is regulated by phase adjustment of the switching angle of the 4IB and 7 thyristors.

Due to the proposed connection of batteries without introducing any additional elements into the device, the operating conditions of the half-windings 2 and 3 of the transformer 1 according to the Two-stroke scheme, i.e. yak in the famous bridge

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rather than half bridge rectification (inversion) circuits. This makes it possible to increase the utilization factor of the current of the said transformator half-windings and to reduce the calculated power of the transformer from 1.48 Pd to 1.11 Pd; ,

A similar continuous current flows through the windings of 8 and 9 drossel. A current flows through thyristors 4-7

Q with a duty cycle of 0.5, as in the known half-bridge converter circuits.

If it is necessary to obtain pulsed 3ar bottom-discharge currents with a frequency that is a multiple of the supply frequency cetH, the inductance of the windings of chokes 8 and 9 must be taken. close to or equal to zero.

Reduction of the transformer rated power from 1.48 Pd to 1.11 Pd, i.e. more than 20% without any complication of the circuit and without the introduction of additional elements gives the proposed scheme with adequate advantages over current air-discharge, made on the basis of single-phase semi-bridge rectifier-inverter converters. ,

Claims (4)

1. Zorokhovich A.E., et al. Devices 5 for charging and discharging batteries, batteries. M., Energie, 1975, pp. 179-186. 2. USSR author's certificate No. 596664, .kl. G 25 D 21/12, 1976. 3. Authors certificate of the USSR 0 №583509, cl. H 02 I 7/10, 1976. 4. For the Germany FRG №2612331, cl. G 08 C 19/6, 1976. rC HS w g j - H I + tt