KR101174292B1 - High capacity charger and charger-discharger with unbalance output detection feature of battery for battery production - Google Patents

Abstract

PURPOSE: A high capacity battery charger for battery production and a charger-discharger are provided to prevent safety accidents by cutting off charging and discharging operations in the case of an abnormal unbalanced situation. CONSTITUTION: An AC power supply is inputted in a power input unit(10). A charge driving unit(20b) rectifies the AC power supply into a DC power supply. A power detection unit detects voltage and current of a plurality of batteries in real time. A controller(40) controls the operation of the power input unit and the charge driving unit according to the voltage and the current detected in the power detection unit. A voltage acquisition unit obtains an output voltage of the charge driving unit in the on-state of a silicon controlled rectifier. An unbalanced output sensing unit(50) comprises a sensing signal generating unit. The sensing signal generating unit creates a sensing signal for cutting off the operation of the charge driving unit and transmits it to the controller.

Description

High capacity charger and charger-discharger with unbalance output detection feature of battery for battery production}

The present invention relates to a large-capacity charger and charger / discharger for battery production with an output unbalance detection function used when a plurality of batteries produced in a battery factory are connected in series and then charged or discharged at the same time.

In general, a battery refers to a secondary battery capable of finitely repeating a discharge for converting chemical energy into electrical energy and a charge for converting electrical energy into chemical energy.

The battery includes a plurality of anode plates and a plurality of cathode plates, each of which is installed in series in the interior of the precursor, the electrolyte filled in the interior of the precursor, and a separator for isolating the anode and cathode plates in the interior of the precursor, the anode and cathode plates, respectively. It consists of connected both terminals and negative terminals.

Therefore, when DC power is input from the outside to the positive and negative plates through both terminals and negative terminals, the electrical energy is converted into chemical energy, which increases the specific gravity of the electrolyte, and the DC power is externally connected through both terminals and the negative terminals. When it is output as, the chemical energy is converted into electrical energy and discharge is performed while the specific gravity of the electrolyte is reduced.

Such a battery is a large amount through the process of installing the processed electrode plate and the separator plate in the tank, injecting the electrolyte solution into the tank and then connecting the plurality in series to charge or charge / discharge operation using a large-capacity charger or charger Produced as

Here, when charging or charging / discharging a plurality of batteries with a large-capacity charger or a charger / discharger, charging or charging / discharging is performed by connecting the output terminals of the large-capacity charger or the charger / discharger in series.

That is, while both terminals of the battery are connected to the negative terminals of the other battery, and the negative terminals of the battery are connected to both terminals of the other battery, the both ends of the battery and the negative terminal of the latest battery are respectively charged or discharged. Connect to each output terminal of to perform charging or charging / discharging operation.

However, when charging and charging / discharging a plurality of batteries using a large-capacity charger and a charger / discharger that rectify AC power to DC power through a silicon-controlled rectifier (SCR), the output is not constant and is output in pulse form. If the (+) and (-) electrodes inside the battery generate heat due to the high pulse current, the temperature of the electrolyte filled in the battery precursor exceeds the limit temperature. This exhaustion causes a safety accident such as causing a fire.

That is, the large-capacity charger and the charger / discharger of the silicon controlled rectifier (6-phase drive) type are shown in FIG. 4 when the normal output waveform is checked through the oscilloscope when the charging operation is performed as shown in FIG. A malfunction occurs due to the aging and error of wiring, the failure of the insulation pulse transformer, the failure of the input power supply, and the like, and the output waveform of FIG. 5 appears.

In the case of the silicon-controlled rectifier-type large-capacity charger / discharger as shown in FIG. 2, when the power supply is not smoothly supplied to TR1 due to a power failure or MC failure during the discharge operation, the silicon controlled rectifier is in an ON state. As a result, the positive side of the battery, the upper silicon controlled rectifier, TR1, the lower silicon controlled rectifier, and the negative side of the battery form a closed circuit. It causes a bigger problem.

In order to solve this problem, MC should be placed on the secondary side of TR1 as shown in FIG. 3, but in this case, in case of power failure during discharge operation, a time delay occurs when the MC is switched from on state to off state. Since the increased current flows and the TR1 burns out, a condition such as a power outage should be detected quickly and the MC should be turned off as soon as possible.

In addition, even when one or more phases of the three-phase power supply are not supplied, the discharge current is concentrated in one winding and exceeds the allowable current, so that TR1 is burned out.

Excessive pulsed current flows into the battery, which increases the temperature inside the initial production battery and rapidly evaporates the electrolyte, causing the battery to deform or fire.

As described above, the output unbalance phenomenon in which at least one of six voltages is not output during the charging operation of the conventional silicon controlled rectifier type large capacity charger and the charger / discharger or at least one of the three voltages during the discharge operation of the large-capacity charger / discharger is not output. When it occurs, the electrolyte is depleted, a bad battery is produced and a safety accident is caused, as well as a circuit element is burned out and there are problems that occur.

Therefore, the present invention obtains the voltage of the output terminal (P, N) of the battery charger and charger and charger for each output cycle of the silicon controlled rectifier in order to solve all the above problems, the charge operation and charge and discharge when the deviation is more than a certain value Its purpose is to provide a large-capacity charger and charger / discharger for battery production with output unbalance detection with a structure that stops operation and informs operators.

The present invention has been invented to solve the above problems, the output stage voltage is obtained for each output cycle of the phase, when the voltage deviation occurs automatically detects the output unbalanced state to immediately stop the charging operation and charging and discharging operation to the operator quickly It provides a large-capacity charger and charger / discharger for battery production with output unbalance detection.

The present invention obtains data on the output terminal voltage in each cycle during the charging and discharging operation of the battery to stop the charging and discharging operation when the output stage voltage is abnormally unbalanced condition and to inform the operator through a warning light and a speaker In addition, it prevents the production of defective batteries and prevents safety accidents, as well as preventing the failure of large-capacity chargers and chargers.

1 is a schematic diagram of a charging operation of a large-capacity charger and a charger / discharger.
2 is a system diagram according to the discharge operation of a large-capacity charger.
3 is another system diagram according to the discharge operation of the large-capacity charger.
Figure 4 is an illustration of a normal output voltage waveform of the large-capacity charger and charger.
5 is an exemplary diagram of a non-static output stage voltage waveform of a large-capacity charger and a charger / discharger.
6 is a block diagram showing the overall configuration of a large-capacity charger / discharger of the present invention.
7 is a block diagram showing an output unbalance detection unit of the present invention.
Figure 8 is a schematic diagram showing the operation of the present invention detects the output unbalanced state of a large-capacity charger.
Figure 9 is a block diagram showing the overall configuration of a large capacity charger of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is a large-capacity charger and charger / discharger for battery production having an output unbalance detection function, wherein a plurality of batteries manufactured at a battery production plant are connected in series, and a connection terminal of the battery at the end thereof and a battery at the end thereof are connected. It is a high-capacity charger and charger / discharger of a silicon controlled rectifier (SCR) type that performs charging and charging / discharging operations by connecting output terminals to terminals.

In particular, the present invention, when abnormal output occurs during the charging operation or charging and discharging operation of the battery, automatically detects it and stops the charging operation or the discharge operation, and informs the worker of such a situation to prevent the production of defective batteries and safety accidents The main feature is that it prevents the device from malfunctioning.

As shown in FIG. 6, the AC power input unit 10 to which AC power is input and the AC power input to the power input unit 10 through a plurality of silicon-controlled rectifiers are converted into DC power and then connected in series. A charge / discharge driver 20a for regeneratively discharging the charged voltages of a plurality of batteries charged or charged to the KEPCO side, a power detector 30 for detecting voltages and currents of the batteries in real time, and a power detector In the large-capacity charger for battery production, comprising a control unit 40 for controlling the operation of the power input unit 10 and the charge and discharge drive unit 20a through the actual voltage and current of the battery detected by the 30, the charge and discharge Between the driver 20a and the controller 40, the output terminal voltage of the charge / discharge driver 20a is obtained for each output cycle of the silicon controlled rectifier during the charge or discharge operation of the battery. According to the configuration, the output unbalance detection unit 50 to notify the operator through the control unit 40 after stopping the charge and discharge operation by sending a detection signal for the output unbalance to the control unit 40 Is achieved.

That is, in charge-discharge operation, the output terminal voltage of the charge / discharge driver 20a is obtained with the same delay time every 6-phase (charge) or 3-phase (discharge) cycle in the ON state of the silicon control rectifier. When the deviation of comparing the two voltage data or three voltage data is a predetermined value or more, the output terminal voltage is recognized as abnormal and sends a detection signal to the control unit 40 to stop the charge and discharge operation and notify the operator.

At this time, the output unbalance detection unit 50 is a voltage acquisition unit 51 for acquiring the output terminal voltage of the charge-discharge driver 20a for each phase period as shown in FIG. 7, and each phase in the voltage acquisition unit 51. Voltage deviation check unit 52 for checking the mutual deviation with respect to the voltage of each phase of the output terminal voltage of the charge-discharge driving unit 20a obtained every cycle, and the output unbalanced state when the deviation is confirmed by the voltage deviation check unit 52 It is regarded as being composed of a microprocessor including a detection signal generation unit 53 for generating a detection signal for stopping the driving of the charge-discharge driving unit 20a and sends it to the control unit 40.

In addition, as shown in FIG. 6, the controller 42 is connected to the speaker 42 together with the alarm lamp 41 to receive a detection signal transmitted from the output unbalance detection unit 50 to effectively inform the operator that the output is unbalanced. It is.

Therefore, in order to charge and discharge the battery initially produced in the battery production plant, a plurality of batteries are connected in series between the output terminals of the large-capacity charger / discharger, and then the output terminal voltage of the charge / discharge drive unit 20a during the charging / discharging operation is set to silicon. The output unbalance detection unit 50 quickly detects and fills an abnormal shape as shown in FIG. 5 due to a failure of a control rectifier, an aging and error of wiring, a failure of an insulation pulse transformer, a failure of an input power supply, a power failure, and the like. After stopping the discharge operation quickly, it is possible to effectively notify the operator by operating the alarm light 41 and the speaker 42.

Accordingly, by eliminating the electrolyte loss caused by the output of the silicon-controlled rectifier of the abnormal charge and discharge drive unit 20a, the fire caused by the electrolyte loss, the damage of the circuit element, etc., it is possible to prevent the production of defective batteries and to prevent safety accidents. Failure of the charger can be prevented.

Here, the process of automatically detecting the output unbalanced state of the large-capacity charger / discharger and stopping the operation and informing the worker will be described in more detail through the operation process illustrated in FIG. 7.

First, when the charge / discharge operation of the battery is performed, the charge / discharge drive unit 20a is operated to charge the input power with the battery during the charging operation, and during the discharge operation, the charged power of the battery is regeneratively discharged to KEPCO.

At the same time, the voltage acquiring unit 51 acquires the voltage at both ends of the output terminal of the charge / discharge driving unit 20a. In this case, the charging operation is performed by the six-phase control during the charging operation. Since discharge is performed by three-phase control, the output terminal voltage is obtained at each period of the three phases.

That is, when the voltage at the output terminal of the charge / discharge driver 20a is normal, the voltage acquisition unit 51 acquires six voltage waveforms in one cycle during the charging operation, and three voltage waveforms in one cycle during the discharge operation. Will be obtained.

At this time, the time for acquiring the data of the voltage waveform is acquired with the same delay time within 200ms after each silicon-controlled rectifier is turned on.

As described above, in the process of acquiring the output terminal voltage of the charge / discharge driver 20a for each period, the voltage acquisition unit 51 obtains six voltage values passed through the filter during the charging operation, and obtains the voltage values passed through the filter during the discharge operation. In the case of three acquisitions, the voltage deviation checking unit 52 checks the deviation of the six voltage values during the charging operation and checks the deviation of the three voltage values during the discharging operation. The detection signal indicating that the state is unbalanced is generated and sent to the controller 40.

Then, the control unit 40 that receives the detection signal of the output unbalance detection unit 50 controls the charging / discharging driving unit 20a to immediately stop the charging / discharging operation, and then to the operator through the alarm lamp 41 and the speaker 42. You will be notified quickly.

As described above, the present invention automatically detects an abnormal output voltage at the time of charging and discharging, and immediately stops the charging and discharging, thereby promptly informing the operator. Accordingly, it is possible to solve all the problems of the conventional large-capacity charger / discharger without the above-described sensing function.

Here, all of the above configuration and operation effects are for a large capacity charger, and in the case of a large capacity charger, as illustrated in FIG. 9, the charge / discharge driving unit 20a of the large capacity charger discharges the AC power input from the power input unit 10. It is configured to replace the charging drive unit 20b for supplying and charging a plurality of batteries connected in series with a DC power converted through the other configuration is the same. And the effect of the large-capacity charger is also the same as the above-described effect of the large-capacity charger.

The above embodiments are merely exemplary, and those skilled in the art may have other embodiments modified in various ways.

Therefore, the true technical protection scope of the present invention should include not only the above embodiment but also various other embodiments modified by the technical spirit of the invention described in the claims below.

10: power input unit 20a: charge and discharge drive unit
20b: charging drive unit
30: power detector 40: control unit
41: alarm light 42: speaker
50: output unbalance detection unit 51: voltage acquisition unit
52: voltage deviation check unit 53: detection signal generation unit

Claims (2)

The charging drive unit 20b for supplying and charging a plurality of batteries connected in series after rectifying the AC power inputted to the power input unit 10 through a plurality of silicon controlled rectifiers and a plurality of silicon connected rectifiers. ), The power detector 30 that detects the voltages and currents of the plurality of batteries in real time, and the power input unit 10 and the charge driver 20b of the battery through the actual voltages and currents of the batteries detected by the power detector 30. In the high-capacity battery charger for producing a battery comprising a control unit 40 for controlling the operation, between the charging drive unit 20b and the control unit 40, the silicon control rectifier in the on state (ON) of the charge of each phase period Check the deviation between the voltage acquisition unit 51 for acquiring the output voltage of the driver 20b and the voltage of each phase of the output terminal voltage of the charge driver 20b obtained at each phase period of the voltage acquisition unit 51. Ha When the deviation is confirmed by the voltage deviation check unit 52 and the voltage deviation check unit 52, the output signal is regarded as an output unbalanced state, and generates a detection signal for stopping the driving of the charging driver 20b and sends it to the control unit 40. An output unbalance detection unit 50 including a detection signal generation unit 53 is provided; The control unit 40 is connected to the alarm light 41 and the speaker 42 to notify the operator of the output unbalanced state of the large-capacity charger by receiving a detection signal transmitted from the output unbalance detection unit 50; Large capacity charger for battery production with output unbalance detection.
After converting the AC power input to the power input unit 10 through the plurality of silicon control rectifiers to the DC power supply to the AC power input unit 10 and the plurality of batteries connected in series or charged or charged A charge / discharge drive unit 20a for regenerative discharge of the charge voltage of the battery to the KEPCO side, a power detector 30 that detects the voltages and currents of the plurality of batteries in real time, an actual voltage of the battery detected by the power detector 30, and In the large-capacity charger for battery production comprising a control unit 40 for controlling the operation of the power input unit 10 and the charge-discharge driver 20a through a current, between the charge-discharge driver 20a and the controller 40 The voltage acquisition unit 51 for acquiring the output terminal voltage of the charge / discharge driver 20a for each phase period in the ON state of the silicon controlled rectifier and the voltage acquisition unit 51 for each phase period The voltage deviation check unit 52 which checks the mutual deviation with respect to the voltage of each phase of the output terminal voltage of the discharge driver 20a, and when the deviation is confirmed by the voltage deviation check unit 52, it is regarded as an output unbalanced state to charge and discharge An output unbalance detection unit 50 including a detection signal generation unit 53 for generating a detection signal for stopping driving of the driving unit 20a and sending it to the control unit 40; The control unit 40 is connected to the alarm light 41 and the speaker 42 to notify the operator of the output unbalanced state of the large-capacity charger by receiving a detection signal transmitted from the output unbalance detection unit 50; Large capacity charger for battery production with output unbalance detection.

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