SU851632A1 - Device for charging storage battery - Google Patents

Description

This invention relates to electrical engineering, namely to devices used for charging and molding. Batteries (AV) are impulsive in current. A device for charging an AB with a pulsed current is known to provide a more economical charge of an AB from a constant voltage source and the ability to smoothly adjust the average value of a pulsed charge current by varying the frequency of alternately turning on its thyristors, which are locked naturally at the time of transition of the current of an inductive circuit. capacitive current limiting the circuit through a zero r value MF The device lack is relatively low voltage, which limits the possibilities using it, the batteries, the voltage of which exceeds the voltage of the power source, is closest to the proposed technical entity is a device that contains two input terminals for connecting a constant voltage source, between which in the forward direction consistently and according to. included two thyristors. Their connection point through a series-connected linear choke and a capacitor is connected to the negative input terminal. Positive input terminal of the device through the winding of the throttle and the connected in the forward direction diode is connected to the positive output terminal of i. When the thyristors are alternately switched on and off in the steady state of the device, an almost sinusoidal alternating voltage is applied, the amplitude value of which is approximately equal to the quality factor LC contour exceeds power supply voltage. When the charging voltage exceeds the voltage of the battery, the diode opens and the battery through the battery connected to the output terminals passes a pulse of current (2J. The disadvantage of this device is low specific energy indicators due to the low output (average charge) power, the arrival per unit of its mass and dimensions, due to the short duration and high porosity of the AB charge current pulses, which is especially noticeable when

small in comparison with the EMF of the voltage of the source, the source itself and the power elements of the charger are significantly underused according to the calculated power, which leads to an unjustified overestimate of the mass and dimensions of the device.

The purpose of the invention is to improve the specific energy indicators of a device for charging ABs by significantly increasing its output power with a slight increase in mass.

The supplied spruce is achieved by the fact that the device for charging the batteries is additionally equipped with five diodes and a capacitor connected in series with the said capacitor. In this case, the first additional diode by the anode is connected to the negative output terminal, and the cathode to the anode of the diode of the device, forming together with it one valve cell, and four detailed additional diodes form another and third valve cells similar to the first one and connected with their extreme leads in parallel The average output of the other cell is connected to the connection point of the thyristors of the device, and the middle output of the third gate cell is connected to the connection point of the capacitors.

The drawing shows a schematic diagram of the device.

The device contains input terminals 1 and 2, thyristors 3 and 4, connected in series and according to between the input terminals, the capacitance 5, made of two series-connected capacitors and a linear choke 6. The first valve cell of the device is made on diodes 7 and ft.

The cathode output of the valve cell is connected to the positive output terminal of the device 9, and the anode output to the negative output terminal 10. The voltage control and control unit 11 controls the operation of the device thyristors. The second and third valve cells consist of diodes 12, 13 and 14, 15 and are connected at the extreme end of the first cell.

The device works following image.

When the thyristor 3 is turned on, the half-wave of current from the power source passes through the linear choke 6 and the capacitance 5, which determine its duration. In the established mode, the voltage on the reactive elements exceeds the voltage of the oscillating circuit many times. At the beginning of the considered half-period, the voltage across the choke 6, being the largest of all voltages applied to the valves of the m-diode1 device, unlocks the diodes 8 and 12 through which the AB charge occurs. When this condition occurs, the recharging of the capacitors 5 occurs. After the voltage on the top of the circuit from the capacitors 5 goes through a zero 5 value, it continues to increase, acts according to the reduction voltage of the droplets 6, opens the diodes 13 and 14, through which the charge d ab At the end of the considered half-period, the greatest of all voltages applied to the diodes of the cells is the upper voltage of the capacitor. Under the action of this voltage, diodes 15 and 8 are unlocked, through which also the charge current of the batteries flows. The half cycle ends by natural turning off the thyristor 3. Then the thyristor 4 and the described

0, the processes are repeated with the difference that diode pairs 8 and 12, 12 and 15 and, finally, 7 and 15 are successively carried out during the п half-cycle of the AB current. As a result, the average value of the charging current of the AB is more than

2.5 times increase in comparison with current of a known device.

Thus, in the proposed device, the output power raises Q s by 2-2.5 times with a very slight increase of it. mass, which allows to improve its specific energy performance.

Claims (2)

1. Canadian Patent O 938665, Cl, 320-2, 197.3 .. 2. USSR author's certificate in accordance with the application If 2632026 / 24-07, cl. H 02J 7/00, 20.-06.78.