RU37884U1 - BATTERY VOLTAGE LEVELING DEVICE - Google Patents

Abstract

1. The device for balancing the voltage in the battery, consisting of at least two series-connected electrical drives, containing a transformer with a common core and the same number of turns of the working windings, control key elements connected in series with each working winding and one of the electrical drives, and a control system in the form of a pulse generator and a shaper of control signals for key elements, characterized in that the working windings are paired in accordance with and bschimi points connected to one of the drive pins and the respective other ends of the windings are connected through the key control elements corresponding to the other terminal nakopiteley.2. The battery voltage equalization device according to claim 1, characterized in that at least two adjacent electrical drives have one common pair of working windings, which is connected by their common point to the common connection point of these electric drives, and this pair of working windings is free ends connected via control key elements to other terminals of the corresponding electrical drives. 3. The voltage equalization device in the battery according to any one of claims 1 and 2, characterized in that the pulse generator is made in the form of a DC voltage converter, and the controlled key elements are made on field-effect transistors.

Description

BATTERY VOLTAGE LEVELING DEVICE

The utility model relates to the field of electrical engineering and can be used in the creation and operation of batteries of electric drives.

Closest to this utility model is a voltage equalization device in a battery of electrical storage devices (accumulators or capacitors), including a transformer having the same working windings on one core, the number of which corresponds to the number of single electrical storage devices, a control key element connected in series with each working winding, and a leveling device control system. Pat. RF, No. 2156533, publ. 09.2000 g.

A disadvantage of the known device for balancing the voltage in the battery is that for the operation of the device requires demagnetization of the transformer core after each duty cycle, which uses additional transformer windings and electrical elements.

The objective of the utility model is to create a device for balancing the voltage in the battery, which eliminates the voltage imbalance of electric drives during battery cycling. The device is applicable both to batteries of single electric drives, and to groups and batteries consisting of modules containing several single drives.

The specified technical result is achieved by the fact that:

In a voltage equalization device in a battery consisting of at least two series-connected electrical drives containing a transformer with a common core and the same number of turns of the working windings, control key elements connected in series with each working

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winding and one of the electric drives, and the control system in the form of a pulse generator and driver for key elements control signals, according to the utility model, the working windings are paired according to and common points are connected to one of the drive terminals, and the other leads of the corresponding windings are connected through control key elements to another conclusion to the corresponding drives.

In a device for equalizing voltage in a battery according to a utility model, at least two adjacent electrical storage devices have one common pair of operating windings, which is connected by their common point to a common connection point of these electrical storage devices, and by their free ends this pair of operating windings is connected through control key elements to other conclusions of the corresponding electric drives.

In the device for balancing the voltage in the battery according to the utility model, the pulse generator is made in the form of a DC-voltage converter, and the controlled key elements are made on field-effect transistors.

An example of a specific implementation.

In FIG. 1 shows one of the possible embodiments of the device for balancing the voltage in the battery, consisting of three series-connected lithium-ion batteries G1, G2 and G3. The device contains a transformer with six working windings T1: 1 ... T1: 6, identical in the number of turns, controlled key elements UKE1 ... UKE6 and a control system for key elements of the control system, consisting of a pulse generator GI and a shaper of control signals for key elements of the FSU. All windings T1: 1 ... T1: 6 are wound on one core and have good mutual induction. Three

In the first cycle, control signals are sent to the FSU output (+ and -) in such a way that UKE2, UKEZ and UKE6 are closed, and UKE1, UKE4 and UKE5 remain in the open state. In this case, the voltage of the battery G1 is supplied to the winding T1: 2 and then through the winding of the transformer T1: 3 to the battery G2, and through the winding of the transformer T1: 6 to the battery G3. If the voltage on the battery G1 is higher than on G2 and / or G3 (taking into account the voltage drop in the switching circuits), then the batteries with a lower voltage (G2 or G3) will be recharged due to the energy of the battery G1, Similarly, redistribution of energy occurs in case of excess voltage on other batteries. In the second clock, the control signals are fed to the FSU output so that UKE2, UKEZ and UKE6 open, and UKE1, UKE4 and UKE5 are closed. In this case, the redistribution of energy between the batteries G1, G2 and G3. occurs through the windings T1: 1, T1: 4 and T1: 5. In the process of equalizing the voltage across all drives, the currents between the batteries are reduced to zero. In this state, the efficiency of the device is determined only by dynamic losses in the control key elements. When the device operates on a push-pull circuit, the magnetization reversal of the transformer core occurs automatically.

The device shown in FIG. 2 works similarly to the device in FIG. 1, and differs from it only in that its windings of the transformer T1: 1 and T1: 2 are common for the battery G1 and G2, which allows to reduce the number of windings, but increases the diameter of the wire, because the current through the winding increases. When the device is operating in the first cycle, the battery G1 is connected to the battery G2 through the windings T1: 2 and T1: 1, and to the battery G3 through the windings T1: 2 and T1: 4. In the second step, these connections are made through the windings T1; 1 - T1: 2, and T1: 1 and T1: 3, respectively.

Claims (3)

1. The device for balancing the voltage in the battery, consisting of at least two series-connected electrical drives, containing a transformer with a common core and the same number of turns of the working windings, control key elements connected in series with each working winding and one of the electrical drives, and a control system in the form of a pulse generator and a shaper of control signals for key elements, characterized in that the working windings are paired in accordance with and bschimi points connected to one of the drive pins and the respective other ends of the windings are connected via control key elements to the other terminal of the respective drives. 2. The device for balancing the voltage in the battery according to claim 1, characterized in that at least two adjacent electric drives have one common pair of working windings, which is connected by a common point to a common connection point of these electric drives, and this pair has free ends working windings is connected through control key elements to other terminals of the corresponding electric drives. 3. The device for equalizing the voltage in the battery according to any one of claims 1 and 2, characterized in that the pulse generator is made in the form of a DC voltage converter, and the controlled key elements are made on field-effect transistors.