JPH0888025A - Charging/discharging device for battery-jar formation of lead-acid battery - Google Patents

Abstract

PURPOSE: To switch positive and negative electrodes without failure and breakage of a constant current circuit and start battery-jar formation by discharging a battery to about 0 volt before the positive and negative electrodes are switched. CONSTITUTION: When a sealed lead-acid battery 6 is reversely charged, positive and negative electrodes are switched, then battery-jar formation is conducted, current for charging is supplied in the opposite direction to regular charging, and voltage immediately after starting falls at first, then gradually rises. The reverse charging is conducted at constant current for 4 hours. Then, charging/discharging switching relay 2 is operated to discharge the battery 6 through a constant load of a discharging resistance 3 to about 0 volt. A positive and negative electrodes switching relay 5 is operated so that terminal polarity becomes opposite, and a charging circuit is connected to regular positive and negative electrodes of the battery 6. Constant current charging is conducted in the same way as regular battery-jar formation. Voltage becomes opposite to the reverse charging and shows regular voltage. Reverse charging is conducted in a constant current circuit 1, and control of the amount of supplied electricity in reverse charging is made easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging / discharging device used for battery case formation of a lead storage battery.

[0002]

2. Description of the Related Art Generally, when a lead storage battery is formed in a battery case, a method of charging an unformed electrode plate group in a battery case by injecting dilute sulfuric acid and continuously energizing in the same direction for a certain period of time is used. Has been adopted. Furthermore, in order to improve the formation efficiency of the positive electrode plate, a method of stopping the energization during the formation of the battery case or performing the discharge while the discharge has been proposed, for example, using a charging / discharging device having a circuit as shown in FIG. Has been. In addition, in order to further improve the formation efficiency of the positive electrode plate, and to reduce the amount of electricity and the time required for forming the battery case, both the positive and negative electrode plates are energized with a certain amount of electricity in the opposite direction of regular charging (hereinafter referred to as "reverse "Charging"),
A method has been proposed in which the positive and negative electrodes are switched as they are to carry out ordinary battery case formation. When this method is used, lead having excellent electric conductivity is reduced and produced particularly on the surface of the positive electrode plate.

[0003]

However, in such a battery case formation method, it is necessary to switch the positive and negative electrodes of the charging and discharging device immediately after the reverse charging, and when the positive and negative electrodes are switched, the reverse voltage is applied to the charging and discharging device. In addition, the circuit of the charging / discharging device was damaged.

[0004]

In order to solve such a problem, in the battery case charging / discharging device for a lead storage battery of the present invention,
After reverse charging, the charging / discharging device is switched between the positive and negative electrodes to form a battery case, and the battery can be discharged to about 0 V before switching the positive and negative electrodes.

That is, in the charging / discharging device for battery case formation of a lead-acid battery of the present invention, an electrode plate group consisting of an unformed positive electrode plate, a negative electrode plate, and a separator is placed in a battery case, and dilute sulfuric acid is injected into the battery case formation. In the charging / discharging device for charging, a positive and negative electrodes are energized with a constant amount of electricity in the opposite direction to normal charging, then the generated potential is discharged to about 0 V, and then the positive and negative electrodes are switched. The feature is that electricity can be supplied in a regular direction.

Further, it is preferable that the device is capable of discharging by a constant resistance.

[0007]

In the charging / discharging device for battery case formation of the lead-acid battery of the present invention, the battery is reversely charged and then discharged to about 0 V, and the battery is formed by switching the positive and negative electrodes. Can be protected.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 shows the above-mentioned conventional standard charging / discharging device for battery case formation. This charging / discharging device has a constant current circuit 1
1, a charge / discharge switching relay 12, a discharging resistor 13, and a backflow prevention diode 14. In the figure, 16 indicates a sealed lead-acid battery. In such a charging / discharging device having the configuration of FIG. 3, it is impossible to automatically switch the positive and negative electrodes to perform battery case formation after reverse charging, and switching the positive and negative terminals reverses the charging and discharging device. Since the voltage is applied, the constant current circuit or the like may be broken or damaged. Particularly, when a plurality of batteries composed of a plurality of cells are connected in series, the generated voltage becomes high and the number of cases of failure or damage increases.

Therefore, in the embodiment of the present invention, as shown in FIG. 1, in addition to the constant current circuit 1, the charging / discharging relay 2, the discharging resistor 3, the backflow prevention diode 4, a positive / negative switching relay 5 is provided. , After reverse charging, the charge / discharge switching relay 2 and the discharging resistor 3 discharge the battery voltage to about 0V.
After that, the positive and negative electrode switching relays 5 are used to switch the positive and negative electrodes of the battery, thereby making it possible to perform battery case formation in which electricity is supplied in the normal direction.

In the embodiment of FIG. 1, 12V, 2.0Ah
FIG. 2 shows the patterns of the battery voltage and the charging / discharging current when the positive and negative electrodes were switched and the battery case was formed after reverse charging using the sealed lead-acid battery 6 of FIG. Charging is started at 0.4A in the opposite direction to normal, but the battery voltage immediately after the start is 16V.
The voltage gradually decreases to about 12V, and then the voltage gradually increases. This reverse charging is carried out at a constant current for 4 hours.
Next, the charge / discharge switching relay 2 is operated and a constant resistance of about 3Ω is used as the discharging resistor 3 to discharge the sealed lead-acid battery 6 as it is and reduce the battery voltage to about 0V. The resistance is determined by the voltage of each battery and the discharge time, but it is desirable to use a constant resistance for management. Next, the positive / negative switching relay 5 is operated so that the polarities of the terminals so far are reversed, and the charging circuit is connected so as to correspond to the normal positive / negative of the battery. After that, charging is performed with a constant current of 0.4 A as in normal battery case formation. As a result, the voltage shows the original voltage behavior though it is opposite to that at the time of the reverse charging. Here, the reverse charging is performed by the constant current circuit 1, but these configurations are also possible by using a constant voltage method or a quasi-constant voltage method. However, it is better to use the constant current method in terms of managing the amount of electricity supplied during reverse charging.

[0012]

As described above, according to the present invention, the battery voltage is reduced to about 0 V by switching the positive and negative electrodes before switching the positive and negative electrodes. It became possible to switch and start battery case formation. Furthermore, by using the battery case charging / discharging device for a lead storage battery of the present invention, since the battery case formation is surely performed after the reverse charging, the conversion efficiency of the positive electrode plate is improved and the total battery case formation time is improved. It has become possible to reduce the amount of electricity and time.

[Brief description of drawings]

FIG. 1 is a configuration diagram according to an embodiment of the present invention.

FIG. 2 is a charge / discharge characteristic diagram according to an embodiment of the present invention.

FIG. 3 is a configuration diagram of a conventional charging / discharging device.

[Explanation of symbols]

 1 constant current circuit 2 charge / discharge switching relay 3 discharge resistor 4 backflow prevention diode 5 positive / negative switching relay 6 sealed lead-acid battery

Claims (2)

[Claims] 1. A charging / discharging device for forming an electrode group comprising an unformed positive electrode plate, a negative electrode plate, and a separator in a battery case and injecting dilute sulfuric acid to form the battery container. After passing a certain amount of electricity in the opposite direction to the charging of the above, the generated potential is discharged until it becomes approximately 0 V, and then the positive and negative electrodes are switched to allow energization in the normal direction by a battery case formation. Charging / discharging device. 2. The charging / discharging device for battery case formation of a lead storage battery according to claim 1, wherein discharging is performed by a constant resistance.